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authorLinus Torvalds <torvalds@linux-foundation.org>2020-03-31 16:18:55 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-03-31 16:18:55 -0700
commit1f944f976d7ef8a29d1ad296253d3a9387c58e62 (patch)
tree454ef4a50ea47c054171cdde6fdc5eb767ab6d4b
parentdfabb077d62552797ca0ae7756cb30d3e195ead5 (diff)
parent8d5b305484e8a3216eeb700ed6c6de870306adbd (diff)
downloadlinux-sh-1f944f976d7ef8a29d1ad296253d3a9387c58e62.tar.gz
Merge tag 'tty-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty/serial updates from Greg KH: "Here is the big set of TTY / Serial patches for 5.7-rc1 Lots of console fixups and reworking in here, serial core tweaks (doesn't that ever get old, why are we still creating new serial devices?), serial driver updates, line-protocol driver updates, and some vt cleanups and fixes included in here as well. All have been in linux-next with no reported issues" * tag 'tty-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (161 commits) serial: 8250: Optimize irq enable after console write serial: 8250: Fix rs485 delay after console write vt: vt_ioctl: fix use-after-free in vt_in_use() vt: vt_ioctl: fix VT_DISALLOCATE freeing in-use virtual console tty: serial: make SERIAL_SPRD depend on COMMON_CLK tty: serial: fsl_lpuart: fix return value checking tty: serial: fsl_lpuart: move dma_request_chan() ARM: dts: tango4: Make /serial compatible with ns16550a ARM: dts: mmp*: Make the serial ports compatible with xscale-uart ARM: dts: mmp*: Fix serial port names ARM: dts: mmp2-brownstone: Don't redeclare phandle references ARM: dts: pxa*: Make the serial ports compatible with xscale-uart ARM: dts: pxa*: Fix serial port names ARM: dts: pxa*: Don't redeclare phandle references serial: omap: drop unused dt-bindings header serial: 8250: 8250_omap: Add DMA support for UARTs on K3 SoCs serial: 8250: 8250_omap: Work around errata causing spurious IRQs with DMA serial: 8250: 8250_omap: Extend driver data to pass FIFO trigger info serial: 8250: 8250_omap: Move locking out from __dma_rx_do_complete() serial: 8250: 8250_omap: Account for data in flight during DMA teardown ...
-rw-r--r--Documentation/ABI/testing/sysfs-tty7
-rw-r--r--Documentation/devicetree/bindings/serial/fsl-imx-uart.txt4
-rw-r--r--Documentation/devicetree/bindings/serial/fsl-lpuart.txt10
-rw-r--r--arch/arm/boot/dts/mmp2-brownstone.dts332
-rw-r--r--arch/arm/boot/dts/mmp2.dtsi16
-rw-r--r--arch/arm/boot/dts/mmp3.dtsi16
-rw-r--r--arch/arm/boot/dts/pxa168-aspenite.dts24
-rw-r--r--arch/arm/boot/dts/pxa168.dtsi15
-rw-r--r--arch/arm/boot/dts/pxa910-dkb.dts286
-rw-r--r--arch/arm/boot/dts/pxa910.dtsi15
-rw-r--r--arch/arm/boot/dts/tango4-common.dtsi2
-rw-r--r--arch/arm64/Kconfig.platforms2
-rw-r--r--arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi73
-rw-r--r--drivers/accessibility/braille/braille_console.c4
-rw-r--r--drivers/tty/hvc/hvc_console.h2
-rw-r--r--drivers/tty/mips_ejtag_fdc.c1
-rw-r--r--drivers/tty/n_gsm.c140
-rw-r--r--drivers/tty/n_hdlc.c549
-rw-r--r--drivers/tty/n_tracesink.h2
-rw-r--r--drivers/tty/n_tty.c6
-rw-r--r--drivers/tty/nozomi.c69
-rw-r--r--drivers/tty/serial/8250/8250.h6
-rw-r--r--drivers/tty/serial/8250/8250_bcm2835aux.c80
-rw-r--r--drivers/tty/serial/8250/8250_core.c15
-rw-r--r--drivers/tty/serial/8250/8250_dwlib.h2
-rw-r--r--drivers/tty/serial/8250/8250_exar.c2
-rw-r--r--drivers/tty/serial/8250/8250_lpss.c6
-rw-r--r--drivers/tty/serial/8250/8250_mtk.c50
-rw-r--r--drivers/tty/serial/8250/8250_of.c67
-rw-r--r--drivers/tty/serial/8250/8250_omap.c263
-rw-r--r--drivers/tty/serial/8250/8250_pci.c2
-rw-r--r--drivers/tty/serial/8250/8250_port.c238
-rw-r--r--drivers/tty/serial/8250/8250_pxa.c2
-rw-r--r--drivers/tty/serial/8250/8250_tegra.c198
-rw-r--r--drivers/tty/serial/8250/Kconfig9
-rw-r--r--drivers/tty/serial/8250/Makefile1
-rw-r--r--drivers/tty/serial/Kconfig14
-rw-r--r--drivers/tty/serial/ar933x_uart.c113
-rw-r--r--drivers/tty/serial/atmel_serial.c23
-rw-r--r--drivers/tty/serial/atmel_serial.h2
-rw-r--r--drivers/tty/serial/cpm_uart/cpm_uart.h6
-rw-r--r--drivers/tty/serial/cpm_uart/cpm_uart_core.c48
-rw-r--r--drivers/tty/serial/earlycon.c11
-rw-r--r--drivers/tty/serial/efm32-uart.c2
-rw-r--r--drivers/tty/serial/fsl_lpuart.c228
-rw-r--r--drivers/tty/serial/icom.h2
-rw-r--r--drivers/tty/serial/ifx6x60.c195
-rw-r--r--drivers/tty/serial/ifx6x60.h15
-rw-r--r--drivers/tty/serial/imx.c44
-rw-r--r--drivers/tty/serial/jsm/jsm.h2
-rw-r--r--drivers/tty/serial/kgdboc.c4
-rw-r--r--drivers/tty/serial/lantiq.c1
-rw-r--r--drivers/tty/serial/omap-serial.c2
-rw-r--r--drivers/tty/serial/pch_uart.c22
-rw-r--r--drivers/tty/serial/pic32_uart.c8
-rw-r--r--drivers/tty/serial/pic32_uart.h2
-rw-r--r--drivers/tty/serial/qcom_geni_serial.c59
-rw-r--r--drivers/tty/serial/sc16is7xx.c2
-rw-r--r--drivers/tty/serial/serial_core.c266
-rw-r--r--drivers/tty/serial/serial_mctrl_gpio.h2
-rw-r--r--drivers/tty/serial/sifive.c55
-rw-r--r--drivers/tty/serial/sirfsoc_uart.h2
-rw-r--r--drivers/tty/serial/sprd_serial.c48
-rw-r--r--drivers/tty/serial/stm32-usart.h2
-rw-r--r--drivers/tty/serial/timbuart.h2
-rw-r--r--drivers/tty/serial/xilinx_uartps.c20
-rw-r--r--drivers/tty/sysrq.c12
-rw-r--r--drivers/tty/vt/selection.c199
-rw-r--r--drivers/tty/vt/vt.c152
-rw-r--r--drivers/tty/vt/vt_ioctl.c75
-rw-r--r--include/linux/console.h1
-rw-r--r--include/linux/selection.h4
-rw-r--r--include/linux/serial_8250.h4
-rw-r--r--include/linux/serial_core.h4
-rw-r--r--include/linux/spi/ifx_modem.h5
-rw-r--r--include/linux/sysrq.h7
-rw-r--r--include/linux/vt_kern.h64
-rw-r--r--kernel/printk/printk.c49
-rw-r--r--kernel/sysctl.c41
-rw-r--r--lib/Kconfig.debug10
80 files changed, 2552 insertions, 1793 deletions
diff --git a/Documentation/ABI/testing/sysfs-tty b/Documentation/ABI/testing/sysfs-tty
index 9eb3c2b6b040..e157130a6792 100644
--- a/Documentation/ABI/testing/sysfs-tty
+++ b/Documentation/ABI/testing/sysfs-tty
@@ -154,3 +154,10 @@ Description:
device specification. For example, when user sets 7bytes on
16550A, which has 1/4/8/14 bytes trigger, the RX trigger is
automatically changed to 4 bytes.
+
+What: /sys/class/tty/ttyS0/console
+Date: February 2020
+Contact: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
+Description:
+ Allows user to detach or attach back the given device as
+ kernel console. It shows and accepts a boolean variable.
diff --git a/Documentation/devicetree/bindings/serial/fsl-imx-uart.txt b/Documentation/devicetree/bindings/serial/fsl-imx-uart.txt
index 35957cbf1571..c8d677f9491f 100644
--- a/Documentation/devicetree/bindings/serial/fsl-imx-uart.txt
+++ b/Documentation/devicetree/bindings/serial/fsl-imx-uart.txt
@@ -8,6 +8,10 @@ Required properties:
Optional properties:
- fsl,dte-mode : Indicate the uart works in DTE mode. The uart works
in DCE mode by default.
+- fsl,inverted-tx , fsl,inverted-rx : Indicate that the hardware attached
+ to the peripheral inverts the signal transmitted or received,
+ respectively, and that the peripheral should invert its output/input
+ using the INVT/INVR registers.
- rs485-rts-delay, rs485-rts-active-low, rs485-rx-during-tx,
linux,rs485-enabled-at-boot-time: see rs485.txt. Note that for RS485
you must enable either the "uart-has-rtscts" or the "rts-gpios"
diff --git a/Documentation/devicetree/bindings/serial/fsl-lpuart.txt b/Documentation/devicetree/bindings/serial/fsl-lpuart.txt
index c904e2e68332..e7448b92dd9d 100644
--- a/Documentation/devicetree/bindings/serial/fsl-lpuart.txt
+++ b/Documentation/devicetree/bindings/serial/fsl-lpuart.txt
@@ -6,6 +6,8 @@ Required properties:
on Vybrid vf610 SoC with 8-bit register organization
- "fsl,ls1021a-lpuart" for lpuart compatible with the one integrated
on LS1021A SoC with 32-bit big-endian register organization
+ - "fsl,ls1028a-lpuart" for lpuart compatible with the one integrated
+ on LS1028A SoC with 32-bit little-endian register organization
- "fsl,imx7ulp-lpuart" for lpuart compatible with the one integrated
on i.MX7ULP SoC with 32-bit little-endian register organization
- "fsl,imx8qxp-lpuart" for lpuart compatible with the one integrated
@@ -15,10 +17,10 @@ Required properties:
- reg : Address and length of the register set for the device
- interrupts : Should contain uart interrupt
- clocks : phandle + clock specifier pairs, one for each entry in clock-names
-- clock-names : For vf610/ls1021a/imx7ulp, "ipg" clock is for uart bus/baud
- clock. For imx8qxp lpuart, "ipg" clock is bus clock that is used to access
- lpuart controller registers, it also requires "baud" clock for module to
- receive/transmit data.
+- clock-names : For vf610/ls1021a/ls1028a/imx7ulp, "ipg" clock is for uart
+ bus/baud clock. For imx8qxp lpuart, "ipg" clock is bus clock that is used
+ to access lpuart controller registers, it also requires "baud" clock for
+ module to receive/transmit data.
Optional properties:
- dmas: A list of two dma specifiers, one for each entry in dma-names.
diff --git a/arch/arm/boot/dts/mmp2-brownstone.dts b/arch/arm/boot/dts/mmp2-brownstone.dts
index aaedc4c742ea..04f1ae1382e7 100644
--- a/arch/arm/boot/dts/mmp2-brownstone.dts
+++ b/arch/arm/boot/dts/mmp2-brownstone.dts
@@ -19,176 +19,174 @@
device_type = "memory";
reg = <0x00000000 0x08000000>;
};
+};
+
+&uart3 {
+ status = "okay";
+};
- soc {
- apb@d4000000 {
- uart3: uart@d4018000 {
- status = "okay";
- };
- twsi1: i2c@d4011000 {
- status = "okay";
- pmic: max8925@3c {
- compatible = "maxium,max8925";
- reg = <0x3c>;
- interrupts = <1>;
- interrupt-parent = <&intcmux4>;
- interrupt-controller;
- #interrupt-cells = <1>;
- maxim,tsc-irq = <0>;
+&twsi1 {
+ status = "okay";
+ pmic: max8925@3c {
+ compatible = "maxium,max8925";
+ reg = <0x3c>;
+ interrupts = <1>;
+ interrupt-parent = <&intcmux4>;
+ interrupt-controller;
+ #interrupt-cells = <1>;
+ maxim,tsc-irq = <0>;
- regulators {
- SDV1 {
- regulator-min-microvolt = <637500>;
- regulator-max-microvolt = <1425000>;
- regulator-boot-on;
- regulator-always-on;
- };
- SDV2 {
- regulator-min-microvolt = <650000>;
- regulator-max-microvolt = <2225000>;
- regulator-boot-on;
- regulator-always-on;
- };
- SDV3 {
- regulator-min-microvolt = <750000>;
- regulator-max-microvolt = <3900000>;
- regulator-boot-on;
- regulator-always-on;
- };
- LDO1 {
- regulator-min-microvolt = <750000>;
- regulator-max-microvolt = <3900000>;
- regulator-boot-on;
- regulator-always-on;
- };
- LDO2 {
- regulator-min-microvolt = <650000>;
- regulator-max-microvolt = <2250000>;
- regulator-boot-on;
- regulator-always-on;
- };
- LDO3 {
- regulator-min-microvolt = <650000>;
- regulator-max-microvolt = <2250000>;
- regulator-boot-on;
- regulator-always-on;
- };
- LDO4 {
- regulator-min-microvolt = <750000>;
- regulator-max-microvolt = <3900000>;
- regulator-boot-on;
- regulator-always-on;
- };
- LDO5 {
- regulator-min-microvolt = <750000>;
- regulator-max-microvolt = <3900000>;
- regulator-boot-on;
- regulator-always-on;
- };
- LDO6 {
- regulator-min-microvolt = <750000>;
- regulator-max-microvolt = <3900000>;
- regulator-boot-on;
- regulator-always-on;
- };
- LDO7 {
- regulator-min-microvolt = <750000>;
- regulator-max-microvolt = <3900000>;
- regulator-boot-on;
- regulator-always-on;
- };
- LDO8 {
- regulator-min-microvolt = <750000>;
- regulator-max-microvolt = <3900000>;
- regulator-boot-on;
- regulator-always-on;
- };
- LDO9 {
- regulator-min-microvolt = <750000>;
- regulator-max-microvolt = <3900000>;
- regulator-boot-on;
- regulator-always-on;
- };
- LDO10 {
- regulator-min-microvolt = <750000>;
- regulator-max-microvolt = <3900000>;
- };
- LDO11 {
- regulator-min-microvolt = <750000>;
- regulator-max-microvolt = <3900000>;
- regulator-boot-on;
- regulator-always-on;
- };
- LDO12 {
- regulator-min-microvolt = <750000>;
- regulator-max-microvolt = <3900000>;
- regulator-boot-on;
- regulator-always-on;
- };
- LDO13 {
- regulator-min-microvolt = <750000>;
- regulator-max-microvolt = <3900000>;
- regulator-boot-on;
- regulator-always-on;
- };
- LDO14 {
- regulator-min-microvolt = <750000>;
- regulator-max-microvolt = <3900000>;
- regulator-boot-on;
- regulator-always-on;
- };
- LDO15 {
- regulator-min-microvolt = <750000>;
- regulator-max-microvolt = <3900000>;
- regulator-boot-on;
- regulator-always-on;
- };
- LDO16 {
- regulator-min-microvolt = <750000>;
- regulator-max-microvolt = <3900000>;
- regulator-boot-on;
- regulator-always-on;
- };
- LDO17 {
- regulator-min-microvolt = <650000>;
- regulator-max-microvolt = <2250000>;
- regulator-boot-on;
- regulator-always-on;
- };
- LDO18 {
- regulator-min-microvolt = <650000>;
- regulator-max-microvolt = <2250000>;
- regulator-boot-on;
- regulator-always-on;
- };
- LDO19 {
- regulator-min-microvolt = <750000>;
- regulator-max-microvolt = <3900000>;
- regulator-boot-on;
- regulator-always-on;
- };
- LDO20 {
- regulator-min-microvolt = <750000>;
- regulator-max-microvolt = <3900000>;
- regulator-boot-on;
- regulator-always-on;
- };
- };
- backlight {
- maxim,max8925-dual-string = <0>;
- };
- charger {
- batt-detect = <0>;
- topoff-threshold = <1>;
- fast-charge = <7>;
- no-temp-support = <0>;
- no-insert-detect = <0>;
- };
- };
- };
- rtc: rtc@d4010000 {
- status = "okay";
+ regulators {
+ SDV1 {
+ regulator-min-microvolt = <637500>;
+ regulator-max-microvolt = <1425000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ SDV2 {
+ regulator-min-microvolt = <650000>;
+ regulator-max-microvolt = <2225000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ SDV3 {
+ regulator-min-microvolt = <750000>;
+ regulator-max-microvolt = <3900000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ LDO1 {
+ regulator-min-microvolt = <750000>;
+ regulator-max-microvolt = <3900000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ LDO2 {
+ regulator-min-microvolt = <650000>;
+ regulator-max-microvolt = <2250000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ LDO3 {
+ regulator-min-microvolt = <650000>;
+ regulator-max-microvolt = <2250000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ LDO4 {
+ regulator-min-microvolt = <750000>;
+ regulator-max-microvolt = <3900000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ LDO5 {
+ regulator-min-microvolt = <750000>;
+ regulator-max-microvolt = <3900000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ LDO6 {
+ regulator-min-microvolt = <750000>;
+ regulator-max-microvolt = <3900000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ LDO7 {
+ regulator-min-microvolt = <750000>;
+ regulator-max-microvolt = <3900000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ LDO8 {
+ regulator-min-microvolt = <750000>;
+ regulator-max-microvolt = <3900000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ LDO9 {
+ regulator-min-microvolt = <750000>;
+ regulator-max-microvolt = <3900000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ LDO10 {
+ regulator-min-microvolt = <750000>;
+ regulator-max-microvolt = <3900000>;
};
+ LDO11 {
+ regulator-min-microvolt = <750000>;
+ regulator-max-microvolt = <3900000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ LDO12 {
+ regulator-min-microvolt = <750000>;
+ regulator-max-microvolt = <3900000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ LDO13 {
+ regulator-min-microvolt = <750000>;
+ regulator-max-microvolt = <3900000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ LDO14 {
+ regulator-min-microvolt = <750000>;
+ regulator-max-microvolt = <3900000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ LDO15 {
+ regulator-min-microvolt = <750000>;
+ regulator-max-microvolt = <3900000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ LDO16 {
+ regulator-min-microvolt = <750000>;
+ regulator-max-microvolt = <3900000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ LDO17 {
+ regulator-min-microvolt = <650000>;
+ regulator-max-microvolt = <2250000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ LDO18 {
+ regulator-min-microvolt = <650000>;
+ regulator-max-microvolt = <2250000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ LDO19 {
+ regulator-min-microvolt = <750000>;
+ regulator-max-microvolt = <3900000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ LDO20 {
+ regulator-min-microvolt = <750000>;
+ regulator-max-microvolt = <3900000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ };
+ backlight {
+ maxim,max8925-dual-string = <0>;
+ };
+ charger {
+ batt-detect = <0>;
+ topoff-threshold = <1>;
+ fast-charge = <7>;
+ no-temp-support = <0>;
+ no-insert-detect = <0>;
};
};
};
+
+&rtc {
+ status = "okay";
+};
diff --git a/arch/arm/boot/dts/mmp2.dtsi b/arch/arm/boot/dts/mmp2.dtsi
index 6a2f072c1d0a..da10567b5aca 100644
--- a/arch/arm/boot/dts/mmp2.dtsi
+++ b/arch/arm/boot/dts/mmp2.dtsi
@@ -208,8 +208,8 @@
clocks = <&soc_clocks MMP2_CLK_TIMER>;
};
- uart1: uart@d4030000 {
- compatible = "mrvl,mmp-uart";
+ uart1: serial@d4030000 {
+ compatible = "mrvl,mmp-uart", "intel,xscale-uart";
reg = <0xd4030000 0x1000>;
interrupts = <27>;
clocks = <&soc_clocks MMP2_CLK_UART0>;
@@ -218,8 +218,8 @@
status = "disabled";
};
- uart2: uart@d4017000 {
- compatible = "mrvl,mmp-uart";
+ uart2: serial@d4017000 {
+ compatible = "mrvl,mmp-uart", "intel,xscale-uart";
reg = <0xd4017000 0x1000>;
interrupts = <28>;
clocks = <&soc_clocks MMP2_CLK_UART1>;
@@ -228,8 +228,8 @@
status = "disabled";
};
- uart3: uart@d4018000 {
- compatible = "mrvl,mmp-uart";
+ uart3: serial@d4018000 {
+ compatible = "mrvl,mmp-uart", "intel,xscale-uart";
reg = <0xd4018000 0x1000>;
interrupts = <24>;
clocks = <&soc_clocks MMP2_CLK_UART2>;
@@ -238,8 +238,8 @@
status = "disabled";
};
- uart4: uart@d4016000 {
- compatible = "mrvl,mmp-uart";
+ uart4: serial@d4016000 {
+ compatible = "mrvl,mmp-uart", "intel,xscale-uart";
reg = <0xd4016000 0x1000>;
interrupts = <46>;
clocks = <&soc_clocks MMP2_CLK_UART3>;
diff --git a/arch/arm/boot/dts/mmp3.dtsi b/arch/arm/boot/dts/mmp3.dtsi
index 59a108e49b41..9b5087a95e73 100644
--- a/arch/arm/boot/dts/mmp3.dtsi
+++ b/arch/arm/boot/dts/mmp3.dtsi
@@ -318,8 +318,8 @@
clocks = <&soc_clocks MMP2_CLK_TIMER>;
};
- uart1: uart@d4030000 {
- compatible = "mrvl,mmp-uart";
+ uart1: serial@d4030000 {
+ compatible = "mrvl,mmp-uart", "intel,xscale-uart";
reg = <0xd4030000 0x1000>;
interrupts = <GIC_SPI 27 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&soc_clocks MMP2_CLK_UART0>;
@@ -328,8 +328,8 @@
status = "disabled";
};
- uart2: uart@d4017000 {
- compatible = "mrvl,mmp-uart";
+ uart2: serial@d4017000 {
+ compatible = "mrvl,mmp-uart", "intel,xscale-uart";
reg = <0xd4017000 0x1000>;
interrupts = <GIC_SPI 28 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&soc_clocks MMP2_CLK_UART1>;
@@ -338,8 +338,8 @@
status = "disabled";
};
- uart3: uart@d4018000 {
- compatible = "mrvl,mmp-uart";
+ uart3: serial@d4018000 {
+ compatible = "mrvl,mmp-uart", "intel,xscale-uart";
reg = <0xd4018000 0x1000>;
interrupts = <GIC_SPI 24 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&soc_clocks MMP2_CLK_UART2>;
@@ -348,8 +348,8 @@
status = "disabled";
};
- uart4: uart@d4016000 {
- compatible = "mrvl,mmp-uart";
+ uart4: serial@d4016000 {
+ compatible = "mrvl,mmp-uart", "intel,xscale-uart";
reg = <0xd4016000 0x1000>;
interrupts = <GIC_SPI 46 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&soc_clocks MMP2_CLK_UART3>;
diff --git a/arch/arm/boot/dts/pxa168-aspenite.dts b/arch/arm/boot/dts/pxa168-aspenite.dts
index 2ad40e373194..8bade6bf395b 100644
--- a/arch/arm/boot/dts/pxa168-aspenite.dts
+++ b/arch/arm/boot/dts/pxa168-aspenite.dts
@@ -18,18 +18,16 @@
memory {
reg = <0x00000000 0x04000000>;
};
+};
- soc {
- apb@d4000000 {
- uart1: uart@d4017000 {
- status = "okay";
- };
- twsi1: i2c@d4011000 {
- status = "okay";
- };
- rtc: rtc@d4010000 {
- status = "okay";
- };
- };
- };
+&uart1 {
+ status = "okay";
+};
+
+&twsi1 {
+ status = "okay";
+};
+
+&rtc {
+ status = "okay";
};
diff --git a/arch/arm/boot/dts/pxa168.dtsi b/arch/arm/boot/dts/pxa168.dtsi
index 72f8cb60cb53..9a9e38245e88 100644
--- a/arch/arm/boot/dts/pxa168.dtsi
+++ b/arch/arm/boot/dts/pxa168.dtsi
@@ -55,27 +55,30 @@
interrupts = <13>;
};
- uart1: uart@d4017000 {
- compatible = "mrvl,mmp-uart";
+ uart1: serial@d4017000 {
+ compatible = "mrvl,mmp-uart", "intel,xscale-uart";
reg = <0xd4017000 0x1000>;
+ reg-shift = <2>;
interrupts = <27>;
clocks = <&soc_clocks PXA168_CLK_UART0>;
resets = <&soc_clocks PXA168_CLK_UART0>;
status = "disabled";
};
- uart2: uart@d4018000 {
- compatible = "mrvl,mmp-uart";
+ uart2: serial@d4018000 {
+ compatible = "mrvl,mmp-uart", "intel,xscale-uart";
reg = <0xd4018000 0x1000>;
+ reg-shift = <2>;
interrupts = <28>;
clocks = <&soc_clocks PXA168_CLK_UART1>;
resets = <&soc_clocks PXA168_CLK_UART1>;
status = "disabled";
};
- uart3: uart@d4026000 {
- compatible = "mrvl,mmp-uart";
+ uart3: serial@d4026000 {
+ compatible = "mrvl,mmp-uart", "intel,xscale-uart";
reg = <0xd4026000 0x1000>;
+ reg-shift = <2>;
interrupts = <29>;
clocks = <&soc_clocks PXA168_CLK_UART2>;
resets = <&soc_clocks PXA168_CLK_UART2>;
diff --git a/arch/arm/boot/dts/pxa910-dkb.dts b/arch/arm/boot/dts/pxa910-dkb.dts
index 0f899e672e82..ce76158867c7 100644
--- a/arch/arm/boot/dts/pxa910-dkb.dts
+++ b/arch/arm/boot/dts/pxa910-dkb.dts
@@ -18,155 +18,153 @@
memory {
reg = <0x00000000 0x10000000>;
};
+};
- soc {
- apb@d4000000 {
- uart1: uart@d4017000 {
- status = "okay";
- };
- twsi1: i2c@d4011000 {
- status = "okay";
+&uart1 {
+ status = "okay";
+};
+
+&twsi1 {
+ status = "okay";
- pmic: 88pm860x@34 {
- compatible = "marvell,88pm860x";
- reg = <0x34>;
- interrupts = <4>;
- interrupt-parent = <&intc>;
- interrupt-controller;
- #interrupt-cells = <1>;
+ pmic: 88pm860x@34 {
+ compatible = "marvell,88pm860x";
+ reg = <0x34>;
+ interrupts = <4>;
+ interrupt-parent = <&intc>;
+ interrupt-controller;
+ #interrupt-cells = <1>;
- marvell,88pm860x-irq-read-clr;
- marvell,88pm860x-slave-addr = <0x11>;
+ marvell,88pm860x-irq-read-clr;
+ marvell,88pm860x-slave-addr = <0x11>;
- regulators {
- BUCK1 {
- regulator-min-microvolt = <1000000>;
- regulator-max-microvolt = <1500000>;
- regulator-boot-on;
- regulator-always-on;
- };
- BUCK2 {
- regulator-min-microvolt = <1000000>;
- regulator-max-microvolt = <1500000>;
- regulator-boot-on;
- regulator-always-on;
- };
- BUCK3 {
- regulator-min-microvolt = <1000000>;
- regulator-max-microvolt = <3000000>;
- regulator-boot-on;
- regulator-always-on;
- };
- LDO1 {
- regulator-min-microvolt = <1200000>;
- regulator-max-microvolt = <2800000>;
- regulator-boot-on;
- regulator-always-on;
- };
- LDO2 {
- regulator-min-microvolt = <1800000>;
- regulator-max-microvolt = <3300000>;
- regulator-boot-on;
- regulator-always-on;
- };
- LDO3 {
- regulator-min-microvolt = <1800000>;
- regulator-max-microvolt = <3300000>;
- regulator-boot-on;
- regulator-always-on;
- };
- LDO4 {
- regulator-min-microvolt = <1800000>;
- regulator-max-microvolt = <3300000>;
- regulator-always-on;
- };
- LDO5 {
- regulator-min-microvolt = <2900000>;
- regulator-max-microvolt = <3300000>;
- regulator-boot-on;
- regulator-always-on;
- };
- LDO6 {
- regulator-min-microvolt = <1800000>;
- regulator-max-microvolt = <3300000>;
- regulator-boot-on;
- regulator-always-on;
- };
- LDO7 {
- regulator-min-microvolt = <1800000>;
- regulator-max-microvolt = <2900000>;
- regulator-boot-on;
- regulator-always-on;
- };
- LDO8 {
- regulator-min-microvolt = <1800000>;
- regulator-max-microvolt = <2900000>;
- regulator-boot-on;
- regulator-always-on;
- };
- LDO9 {
- regulator-min-microvolt = <1800000>;
- regulator-max-microvolt = <3300000>;
- regulator-boot-on;
- regulator-always-on;
- };
- LDO10 {
- regulator-min-microvolt = <1200000>;
- regulator-max-microvolt = <3300000>;
- regulator-boot-on;
- regulator-always-on;
- };
- LDO12 {
- regulator-min-microvolt = <1200000>;
- regulator-max-microvolt = <3300000>;
- regulator-always-on;
- };
- LDO13 {
- regulator-min-microvolt = <1200000>;
- regulator-max-microvolt = <3300000>;
- regulator-always-on;
- };
- LDO14 {
- regulator-min-microvolt = <1800000>;
- regulator-max-microvolt = <3300000>;
- regulator-always-on;
- };
- };
- rtc {
- marvell,88pm860x-vrtc = <1>;
- };
- touch {
- marvell,88pm860x-gpadc-prebias = <1>;
- marvell,88pm860x-gpadc-slot-cycle = <1>;
- marvell,88pm860x-tsi-prebias = <6>;
- marvell,88pm860x-pen-prebias = <16>;
- marvell,88pm860x-pen-prechg = <2>;
- marvell,88pm860x-resistor-X = <300>;
- };
- backlights {
- backlight-0 {
- marvell,88pm860x-iset = <4>;
- marvell,88pm860x-pwm = <3>;
- };
- backlight-2 {
- };
- };
- leds {
- led0-red {
- marvell,88pm860x-iset = <12>;
- };
- led0-green {
- marvell,88pm860x-iset = <12>;
- };
- led0-blue {
- marvell,88pm860x-iset = <12>;
- };
- };
- };
- };
- rtc: rtc@d4010000 {
- status = "okay";
+ regulators {
+ BUCK1 {
+ regulator-min-microvolt = <1000000>;
+ regulator-max-microvolt = <1500000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ BUCK2 {
+ regulator-min-microvolt = <1000000>;
+ regulator-max-microvolt = <1500000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ BUCK3 {
+ regulator-min-microvolt = <1000000>;
+ regulator-max-microvolt = <3000000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ LDO1 {
+ regulator-min-microvolt = <1200000>;
+ regulator-max-microvolt = <2800000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ LDO2 {
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ LDO3 {
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ LDO4 {
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-always-on;
+ };
+ LDO5 {
+ regulator-min-microvolt = <2900000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ LDO6 {
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ LDO7 {
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <2900000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ LDO8 {
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <2900000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ LDO9 {
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ LDO10 {
+ regulator-min-microvolt = <1200000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ LDO12 {
+ regulator-min-microvolt = <1200000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-always-on;
+ };
+ LDO13 {
+ regulator-min-microvolt = <1200000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-always-on;
+ };
+ LDO14 {
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-always-on;
+ };
+ };
+ rtc {
+ marvell,88pm860x-vrtc = <1>;
+ };
+ touch {
+ marvell,88pm860x-gpadc-prebias = <1>;
+ marvell,88pm860x-gpadc-slot-cycle = <1>;
+ marvell,88pm860x-tsi-prebias = <6>;
+ marvell,88pm860x-pen-prebias = <16>;
+ marvell,88pm860x-pen-prechg = <2>;
+ marvell,88pm860x-resistor-X = <300>;
+ };
+ backlights {
+ backlight-0 {
+ marvell,88pm860x-iset = <4>;
+ marvell,88pm860x-pwm = <3>;
+ };
+ backlight-2 {
+ };
+ };
+ leds {
+ led0-red {
+ marvell,88pm860x-iset = <12>;
+ };
+ led0-green {
+ marvell,88pm860x-iset = <12>;
+ };
+ led0-blue {
+ marvell,88pm860x-iset = <12>;
};
};
};
};
+
+&rtc {
+ status = "okay";
+};
diff --git a/arch/arm/boot/dts/pxa910.dtsi b/arch/arm/boot/dts/pxa910.dtsi
index b3d6182d4de4..587a5e7f0702 100644
--- a/arch/arm/boot/dts/pxa910.dtsi
+++ b/arch/arm/boot/dts/pxa910.dtsi
@@ -67,27 +67,30 @@
status = "disabled";
};
- uart1: uart@d4017000 {
- compatible = "mrvl,mmp-uart";
+ uart1: serial@d4017000 {
+ compatible = "mrvl,mmp-uart", "intel,xscale-uart";
reg = <0xd4017000 0x1000>;
+ reg-shift = <2>;
interrupts = <27>;
clocks = <&soc_clocks PXA910_CLK_UART0>;
resets = <&soc_clocks PXA910_CLK_UART0>;
status = "disabled";
};
- uart2: uart@d4018000 {
- compatible = "mrvl,mmp-uart";
+ uart2: serial@d4018000 {
+ compatible = "mrvl,mmp-uart", "intel,xscale-uart";
reg = <0xd4018000 0x1000>;
+ reg-shift = <2>;
interrupts = <28>;
clocks = <&soc_clocks PXA910_CLK_UART1>;
resets = <&soc_clocks PXA910_CLK_UART1>;
status = "disabled";
};
- uart3: uart@d4036000 {
- compatible = "mrvl,mmp-uart";
+ uart3: serial@d4036000 {
+ compatible = "mrvl,mmp-uart", "intel,xscale-uart";
reg = <0xd4036000 0x1000>;
+ reg-shift = <2>;
interrupts = <59>;
clocks = <&soc_clocks PXA910_CLK_UART2>;
resets = <&soc_clocks PXA910_CLK_UART2>;
diff --git a/arch/arm/boot/dts/tango4-common.dtsi b/arch/arm/boot/dts/tango4-common.dtsi
index ff72a8efb73d..54fd522badfc 100644
--- a/arch/arm/boot/dts/tango4-common.dtsi
+++ b/arch/arm/boot/dts/tango4-common.dtsi
@@ -85,7 +85,7 @@
};
uart: serial@10700 {
- compatible = "ralink,rt2880-uart";
+ compatible = "ralink,rt2880-uart", "ns16550a";
reg = <0x10700 0x30>;
interrupts = <1 IRQ_TYPE_LEVEL_HIGH>;
clock-frequency = <7372800>;
diff --git a/arch/arm64/Kconfig.platforms b/arch/arm64/Kconfig.platforms
index b2b504ea6fd6..76778b2f520d 100644
--- a/arch/arm64/Kconfig.platforms
+++ b/arch/arm64/Kconfig.platforms
@@ -249,7 +249,7 @@ config ARCH_TEGRA
This enables support for the NVIDIA Tegra SoC family.
config ARCH_SPRD
- bool "Spreadtrum SoC platform"
+ tristate "Spreadtrum SoC platform"
help
Support for Spreadtrum ARM based SoCs
diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi b/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi
index 55b71bb4baf8..c28a25b145ae 100644
--- a/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi
+++ b/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi
@@ -333,6 +333,79 @@
status = "disabled";
};
+
+ lpuart0: serial@2260000 {
+ compatible = "fsl,ls1028a-lpuart";
+ reg = <0x0 0x2260000 0x0 0x1000>;
+ interrupts = <GIC_SPI 232 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&clockgen 4 1>;
+ clock-names = "ipg";
+ dma-names = "rx","tx";
+ dmas = <&edma0 1 32>,
+ <&edma0 1 33>;
+ status = "disabled";
+ };
+
+ lpuart1: serial@2270000 {
+ compatible = "fsl,ls1028a-lpuart";
+ reg = <0x0 0x2270000 0x0 0x1000>;
+ interrupts = <GIC_SPI 233 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&clockgen 4 1>;
+ clock-names = "ipg";
+ dma-names = "rx","tx";
+ dmas = <&edma0 1 30>,
+ <&edma0 1 31>;
+ status = "disabled";
+ };
+
+ lpuart2: serial@2280000 {
+ compatible = "fsl,ls1028a-lpuart";
+ reg = <0x0 0x2280000 0x0 0x1000>;
+ interrupts = <GIC_SPI 234 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&clockgen 4 1>;
+ clock-names = "ipg";
+ dma-names = "rx","tx";
+ dmas = <&edma0 1 28>,
+ <&edma0 1 29>;
+ status = "disabled";
+ };
+
+ lpuart3: serial@2290000 {
+ compatible = "fsl,ls1028a-lpuart";
+ reg = <0x0 0x2290000 0x0 0x1000>;
+ interrupts = <GIC_SPI 235 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&clockgen 4 1>;
+ clock-names = "ipg";
+ dma-names = "rx","tx";
+ dmas = <&edma0 1 26>,
+ <&edma0 1 27>;
+ status = "disabled";
+ };
+
+ lpuart4: serial@22a0000 {
+ compatible = "fsl,ls1028a-lpuart";
+ reg = <0x0 0x22a0000 0x0 0x1000>;
+ interrupts = <GIC_SPI 236 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&clockgen 4 1>;
+ clock-names = "ipg";
+ dma-names = "rx","tx";
+ dmas = <&edma0 1 24>,
+ <&edma0 1 25>;
+ status = "disabled";
+ };
+
+ lpuart5: serial@22b0000 {
+ compatible = "fsl,ls1028a-lpuart";
+ reg = <0x0 0x22b0000 0x0 0x1000>;
+ interrupts = <GIC_SPI 237 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&clockgen 4 1>;
+ clock-names = "ipg";
+ dma-names = "rx","tx";
+ dmas = <&edma0 1 22>,
+ <&edma0 1 23>;
+ status = "disabled";
+ };
+
edma0: dma-controller@22c0000 {
#dma-cells = <2>;
compatible = "fsl,ls1028a-edma";
diff --git a/drivers/accessibility/braille/braille_console.c b/drivers/accessibility/braille/braille_console.c
index 1339c586bf64..a8f7c278b691 100644
--- a/drivers/accessibility/braille/braille_console.c
+++ b/drivers/accessibility/braille/braille_console.c
@@ -347,8 +347,6 @@ int braille_register_console(struct console *console, int index,
{
int ret;
- if (!(console->flags & CON_BRL))
- return 0;
if (!console_options)
/* Only support VisioBraille for now */
console_options = "57600o8";
@@ -371,8 +369,6 @@ int braille_unregister_console(struct console *console)
{
if (braille_co != console)
return -EINVAL;
- if (!(console->flags & CON_BRL))
- return 0;
unregister_keyboard_notifier(&keyboard_notifier_block);
unregister_vt_notifier(&vt_notifier_block);
braille_co = NULL;
diff --git a/drivers/tty/hvc/hvc_console.h b/drivers/tty/hvc/hvc_console.h
index e9319954c832..18d005814e4b 100644
--- a/drivers/tty/hvc/hvc_console.h
+++ b/drivers/tty/hvc/hvc_console.h
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0+
+/* SPDX-License-Identifier: GPL-2.0+ */
/*
* hvc_console.h
* Copyright (C) 2005 IBM Corporation
diff --git a/drivers/tty/mips_ejtag_fdc.c b/drivers/tty/mips_ejtag_fdc.c
index 620d8488b83e..21e76a2ec182 100644
--- a/drivers/tty/mips_ejtag_fdc.c
+++ b/drivers/tty/mips_ejtag_fdc.c
@@ -243,6 +243,7 @@ done:
/* Fall back to a 3 byte encoding */
word.bytes = 3;
word.word &= 0x00ffffff;
+ /* Fall through */
case 3:
/* 3 byte encoding */
word.word |= 0x82000000;
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index f1c90fa2978e..d77ed82a4840 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -97,7 +97,19 @@ struct gsm_msg {
u8 ctrl; /* Control byte + flags */
unsigned int len; /* Length of data block (can be zero) */
unsigned char *data; /* Points into buffer but not at the start */
- unsigned char buffer[0];
+ unsigned char buffer[];
+};
+
+enum gsm_dlci_state {
+ DLCI_CLOSED,
+ DLCI_OPENING, /* Sending SABM not seen UA */
+ DLCI_OPEN, /* SABM/UA complete */
+ DLCI_CLOSING, /* Sending DISC not seen UA/DM */
+};
+
+enum gsm_dlci_mode {
+ DLCI_MODE_ABM, /* Normal Asynchronous Balanced Mode */
+ DLCI_MODE_ADM, /* Asynchronous Disconnected Mode */
};
/*
@@ -113,32 +125,25 @@ struct gsm_msg {
struct gsm_dlci {
struct gsm_mux *gsm;
int addr;
- int state;
-#define DLCI_CLOSED 0
-#define DLCI_OPENING 1 /* Sending SABM not seen UA */
-#define DLCI_OPEN 2 /* SABM/UA complete */
-#define DLCI_CLOSING 3 /* Sending DISC not seen UA/DM */
+ enum gsm_dlci_state state;
struct mutex mutex;
/* Link layer */
- int mode;
-#define DLCI_MODE_ABM 0 /* Normal Asynchronous Balanced Mode */
-#define DLCI_MODE_ADM 1 /* Asynchronous Disconnected Mode */
+ enum gsm_dlci_mode mode;
spinlock_t lock; /* Protects the internal state */
struct timer_list t1; /* Retransmit timer for SABM and UA */
int retries;
/* Uplink tty if active */
struct tty_port port; /* The tty bound to this DLCI if there is one */
- struct kfifo *fifo; /* Queue fifo for the DLCI */
- struct kfifo _fifo; /* For new fifo API porting only */
+ struct kfifo fifo; /* Queue fifo for the DLCI */
int adaption; /* Adaption layer in use */
int prev_adaption;
u32 modem_rx; /* Our incoming virtual modem lines */
u32 modem_tx; /* Our outgoing modem lines */
- int dead; /* Refuse re-open */
+ bool dead; /* Refuse re-open */
/* Flow control */
- int throttled; /* Private copy of throttle state */
- int constipated; /* Throttle status for outgoing */
+ bool throttled; /* Private copy of throttle state */
+ bool constipated; /* Throttle status for outgoing */
/* Packetised I/O */
struct sk_buff *skb; /* Frame being sent */
struct sk_buff_head skb_list; /* Queued frames */
@@ -168,6 +173,20 @@ struct gsm_control {
int error; /* Error if any */
};
+enum gsm_mux_state {
+ GSM_SEARCH,
+ GSM_START,
+ GSM_ADDRESS,
+ GSM_CONTROL,
+ GSM_LEN,
+ GSM_DATA,
+ GSM_FCS,
+ GSM_OVERRUN,
+ GSM_LEN0,
+ GSM_LEN1,
+ GSM_SSOF,
+};
+
/*
* Each GSM mux we have is represented by this structure. If we are
* operating as an ldisc then we use this structure as our ldisc
@@ -192,22 +211,11 @@ struct gsm_mux {
/* Framing Layer */
unsigned char *buf;
- int state;
-#define GSM_SEARCH 0
-#define GSM_START 1
-#define GSM_ADDRESS 2
-#define GSM_CONTROL 3
-#define GSM_LEN 4
-#define GSM_DATA 5
-#define GSM_FCS 6
-#define GSM_OVERRUN 7
-#define GSM_LEN0 8
-#define GSM_LEN1 9
-#define GSM_SSOF 10
+ enum gsm_mux_state state;
unsigned int len;
unsigned int address;
unsigned int count;
- int escape;
+ bool escape;
int encoding;
u8 control;
u8 fcs;
@@ -224,9 +232,9 @@ struct gsm_mux {
unsigned int mru;
unsigned int mtu;
int initiator; /* Did we initiate connection */
- int dead; /* Has the mux been shut down */
+ bool dead; /* Has the mux been shut down */
struct gsm_dlci *dlci[NUM_DLCI];
- int constipated; /* Asked by remote to shut up */
+ bool constipated; /* Asked by remote to shut up */
spinlock_t tx_lock;
unsigned int tx_bytes; /* TX data outstanding */
@@ -796,7 +804,7 @@ static int gsm_dlci_data_output(struct gsm_mux *gsm, struct gsm_dlci *dlci)
total_size = 0;
while (1) {
- len = kfifo_len(dlci->fifo);
+ len = kfifo_len(&dlci->fifo);
if (len == 0)
return total_size;
@@ -820,7 +828,7 @@ static int gsm_dlci_data_output(struct gsm_mux *gsm, struct gsm_dlci *dlci)
*dp++ = gsm_encode_modem(dlci);
break;
}
- WARN_ON(kfifo_out_locked(dlci->fifo, dp , len, &dlci->lock) != len);
+ WARN_ON(kfifo_out_locked(&dlci->fifo, dp , len, &dlci->lock) != len);
__gsm_data_queue(dlci, msg);
total_size += size;
}
@@ -1034,9 +1042,9 @@ static void gsm_process_modem(struct tty_struct *tty, struct gsm_dlci *dlci,
fc = (modem & MDM_FC) || !(modem & MDM_RTR);
if (fc && !dlci->constipated) {
/* Need to throttle our output on this device */
- dlci->constipated = 1;
+ dlci->constipated = true;
} else if (!fc && dlci->constipated) {
- dlci->constipated = 0;
+ dlci->constipated = false;
gsm_dlci_data_kick(dlci);
}
@@ -1199,8 +1207,8 @@ static void gsm_control_message(struct gsm_mux *gsm, unsigned int command,
struct gsm_dlci *dlci = gsm->dlci[0];
/* Modem wishes to close down */
if (dlci) {
- dlci->dead = 1;
- gsm->dead = 1;
+ dlci->dead = true;
+ gsm->dead = true;
gsm_dlci_begin_close(dlci);
}
}
@@ -1211,7 +1219,7 @@ static void gsm_control_message(struct gsm_mux *gsm, unsigned int command,
break;
case CMD_FCON:
/* Modem can accept data again */
- gsm->constipated = 0;
+ gsm->constipated = false;
gsm_control_reply(gsm, CMD_FCON, NULL, 0);
/* Kick the link in case it is idling */
spin_lock_irqsave(&gsm->tx_lock, flags);
@@ -1220,7 +1228,7 @@ static void gsm_control_message(struct gsm_mux *gsm, unsigned int command,
break;
case CMD_FCOFF:
/* Modem wants us to STFU */
- gsm->constipated = 1;
+ gsm->constipated = true;
gsm_control_reply(gsm, CMD_FCOFF, NULL, 0);
break;
case CMD_MSC:
@@ -1424,9 +1432,9 @@ static void gsm_dlci_close(struct gsm_dlci *dlci)
dlci->state = DLCI_CLOSED;
if (dlci->addr != 0) {
tty_port_tty_hangup(&dlci->port, false);
- kfifo_reset(dlci->fifo);
+ kfifo_reset(&dlci->fifo);
} else
- dlci->gsm->dead = 1;
+ dlci->gsm->dead = true;
wake_up(&dlci->gsm->event);
/* A DLCI 0 close is a MUX termination so we need to kick that
back to userspace somehow */
@@ -1496,6 +1504,9 @@ static void gsm_dlci_t1(struct timer_list *t)
} else
gsm_dlci_close(dlci);
break;
+ default:
+ pr_debug("%s: unhandled state: %d\n", __func__, dlci->state);
+ break;
}
}
@@ -1645,8 +1656,7 @@ static struct gsm_dlci *gsm_dlci_alloc(struct gsm_mux *gsm, int addr)
return NULL;
spin_lock_init(&dlci->lock);
mutex_init(&dlci->mutex);
- dlci->fifo = &dlci->_fifo;
- if (kfifo_alloc(&dlci->_fifo, 4096, GFP_KERNEL) < 0) {
+ if (kfifo_alloc(&dlci->fifo, 4096, GFP_KERNEL) < 0) {
kfree(dlci);
return NULL;
}
@@ -1681,7 +1691,7 @@ static void gsm_dlci_free(struct tty_port *port)
del_timer_sync(&dlci->t1);
dlci->gsm->dlci[dlci->addr] = NULL;
- kfifo_free(dlci->fifo);
+ kfifo_free(&dlci->fifo);
while ((dlci->skb = skb_dequeue(&dlci->skb_list)))
dev_kfree_skb(dlci->skb);
kfree(dlci);
@@ -1810,6 +1820,10 @@ static void gsm_queue(struct gsm_mux *gsm)
case DLCI_OPENING:
gsm_dlci_open(dlci);
break;
+ default:
+ pr_debug("%s: unhandled state: %d\n", __func__,
+ dlci->state);
+ break;
}
break;
case DM: /* DM can be valid unsolicited */
@@ -1923,6 +1937,9 @@ static void gsm0_receive(struct gsm_mux *gsm, unsigned char c)
break;
}
break;
+ default:
+ pr_debug("%s: unhandled state: %d\n", __func__, gsm->state);
+ break;
}
}
@@ -1959,7 +1976,7 @@ static void gsm1_receive(struct gsm_mux *gsm, unsigned char c)
}
if (c == GSM1_ESCAPE) {
- gsm->escape = 1;
+ gsm->escape = true;
return;
}
@@ -1969,7 +1986,7 @@ static void gsm1_receive(struct gsm_mux *gsm, unsigned char c)
if (gsm->escape) {
c ^= GSM1_ESCAPE_BITS;
- gsm->escape = 0;
+ gsm->escape = false;
}
switch (gsm->state) {
case GSM_START: /* First byte after SOF */
@@ -1997,6 +2014,9 @@ static void gsm1_receive(struct gsm_mux *gsm, unsigned char c)
break;
case GSM_OVERRUN: /* Over-long - eg a dropped SOF */
break;
+ default:
+ pr_debug("%s: unhandled state: %d\n", __func__, gsm->state);
+ break;
}
}
@@ -2061,7 +2081,7 @@ static void gsm_cleanup_mux(struct gsm_mux *gsm)
struct gsm_dlci *dlci = gsm->dlci[0];
struct gsm_msg *txq, *ntxq;
- gsm->dead = 1;
+ gsm->dead = true;
spin_lock(&gsm_mux_lock);
for (i = 0; i < MAX_MUX; i++) {
@@ -2078,7 +2098,7 @@ static void gsm_cleanup_mux(struct gsm_mux *gsm)
del_timer_sync(&gsm->t2_timer);
/* Now we are sure T2 has stopped */
if (dlci)
- dlci->dead = 1;
+ dlci->dead = true;
/* Free up any link layer users */
mutex_lock(&gsm->mutex);
@@ -2132,7 +2152,7 @@ static int gsm_activate_mux(struct gsm_mux *gsm)
dlci = gsm_dlci_alloc(gsm, 0);
if (dlci == NULL)
return -ENOMEM;
- gsm->dead = 0; /* Tty opens are now permissible */
+ gsm->dead = false; /* Tty opens are now permissible */
return 0;
}
@@ -2216,7 +2236,7 @@ static struct gsm_mux *gsm_alloc_mux(void)
gsm->encoding = 1;
gsm->mru = 64; /* Default to encoding 1 so these should be 64 */
gsm->mtu = 64;
- gsm->dead = 1; /* Avoid early tty opens */
+ gsm->dead = true; /* Avoid early tty opens */
return gsm;
}
@@ -2618,11 +2638,11 @@ static int gsmld_ioctl(struct tty_struct *tty, struct file *file,
switch (cmd) {
case GSMIOC_GETCONF:
gsm_copy_config_values(gsm, &c);
- if (copy_to_user((void *)arg, &c, sizeof(c)))
+ if (copy_to_user((void __user *)arg, &c, sizeof(c)))
return -EFAULT;
return 0;
case GSMIOC_SETCONF:
- if (copy_from_user(&c, (void *)arg, sizeof(c)))
+ if (copy_from_user(&c, (void __user *)arg, sizeof(c)))
return -EFAULT;
return gsm_config(gsm, &c);
case GSMIOC_GETFIRST:
@@ -2769,7 +2789,7 @@ static void gsm_destroy_network(struct gsm_dlci *dlci)
{
struct gsm_mux_net *mux_net;
- pr_debug("destroy network interface");
+ pr_debug("destroy network interface\n");
if (!dlci->net)
return;
mux_net = netdev_priv(dlci->net);
@@ -2798,7 +2818,7 @@ static int gsm_create_network(struct gsm_dlci *dlci, struct gsm_netconfig *nc)
if (nc->adaption != 3 && nc->adaption != 4)
return -EPROTONOSUPPORT;
- pr_debug("create network interface");
+ pr_debug("create network interface\n");
netname = "gsm%d";
if (nc->if_name[0] != '\0')
@@ -2806,7 +2826,7 @@ static int gsm_create_network(struct gsm_dlci *dlci, struct gsm_netconfig *nc)
net = alloc_netdev(sizeof(struct gsm_mux_net), netname,
NET_NAME_UNKNOWN, gsm_mux_net_init);
if (!net) {
- pr_err("alloc_netdev failed");
+ pr_err("alloc_netdev failed\n");
return -ENOMEM;
}
net->mtu = dlci->gsm->mtu;
@@ -2824,7 +2844,7 @@ static int gsm_create_network(struct gsm_dlci *dlci, struct gsm_netconfig *nc)
dlci->data = gsm_mux_rx_netchar;
dlci->net = net;
- pr_debug("register netdev");
+ pr_debug("register netdev\n");
retval = register_netdev(net);
if (retval) {
pr_err("network register fail %d\n", retval);
@@ -3030,7 +3050,7 @@ static int gsmtty_write(struct tty_struct *tty, const unsigned char *buf,
if (dlci->state == DLCI_CLOSED)
return -EINVAL;
/* Stuff the bytes into the fifo queue */
- sent = kfifo_in_locked(dlci->fifo, buf, len, &dlci->lock);
+ sent = kfifo_in_locked(&dlci->fifo, buf, len, &dlci->lock);
/* Need to kick the channel */
gsm_dlci_data_kick(dlci);
return sent;
@@ -3041,7 +3061,7 @@ static int gsmtty_write_room(struct tty_struct *tty)
struct gsm_dlci *dlci = tty->driver_data;
if (dlci->state == DLCI_CLOSED)
return -EINVAL;
- return TX_SIZE - kfifo_len(dlci->fifo);
+ return TX_SIZE - kfifo_len(&dlci->fifo);
}
static int gsmtty_chars_in_buffer(struct tty_struct *tty)
@@ -3049,7 +3069,7 @@ static int gsmtty_chars_in_buffer(struct tty_struct *tty)
struct gsm_dlci *dlci = tty->driver_data;
if (dlci->state == DLCI_CLOSED)
return -EINVAL;
- return kfifo_len(dlci->fifo);
+ return kfifo_len(&dlci->fifo);
}
static void gsmtty_flush_buffer(struct tty_struct *tty)
@@ -3061,7 +3081,7 @@ static void gsmtty_flush_buffer(struct tty_struct *tty)
then the data being transmitted can't simply be junked once
it has first hit the stack. Until then we can just blow it
away */
- kfifo_reset(dlci->fifo);
+ kfifo_reset(&dlci->fifo);
/* Need to unhook this DLCI from the transmit queue logic */
}
@@ -3152,7 +3172,7 @@ static void gsmtty_throttle(struct tty_struct *tty)
return;
if (C_CRTSCTS(tty))
dlci->modem_tx &= ~TIOCM_DTR;
- dlci->throttled = 1;
+ dlci->throttled = true;
/* Send an MSC with DTR cleared */
gsmtty_modem_update(dlci, 0);
}
@@ -3164,7 +3184,7 @@ static void gsmtty_unthrottle(struct tty_struct *tty)
return;
if (C_CRTSCTS(tty))
dlci->modem_tx |= TIOCM_DTR;
- dlci->throttled = 0;
+ dlci->throttled = false;
/* Send an MSC with DTR set */
gsmtty_modem_update(dlci, 0);
}
diff --git a/drivers/tty/n_hdlc.c b/drivers/tty/n_hdlc.c
index 27b506bf03ce..991f49ee4026 100644
--- a/drivers/tty/n_hdlc.c
+++ b/drivers/tty/n_hdlc.c
@@ -18,7 +18,7 @@
* All HDLC data is frame oriented which means:
*
* 1. tty write calls represent one complete transmit frame of data
- * The device driver should accept the complete frame or none of
+ * The device driver should accept the complete frame or none of
* the frame (busy) in the write method. Each write call should have
* a byte count in the range of 2-65535 bytes (2 is min HDLC frame
* with 1 addr byte and 1 ctrl byte). The max byte count of 65535
@@ -39,7 +39,7 @@
* tty read calls.
*
* 3. tty read calls returns an entire frame of data or nothing.
- *
+ *
* 4. all send and receive data is considered raw. No processing
* or translation is performed by the line discipline, regardless
* of the tty flags
@@ -87,9 +87,6 @@
#include <linux/interrupt.h>
#include <linux/ptrace.h>
-#undef VERSION
-#define VERSION(major,minor,patch) (((((major)<<8)+(minor))<<8)+(patch))
-
#include <linux/poll.h>
#include <linux/in.h>
#include <linux/ioctl.h>
@@ -107,7 +104,7 @@
/*
* Buffers for individual HDLC frames
*/
-#define MAX_HDLC_FRAME_SIZE 65535
+#define MAX_HDLC_FRAME_SIZE 65535
#define DEFAULT_RX_BUF_COUNT 10
#define MAX_RX_BUF_COUNT 60
#define DEFAULT_TX_BUF_COUNT 3
@@ -127,11 +124,8 @@ struct n_hdlc_buf_list {
/**
* struct n_hdlc - per device instance data structure
* @magic - magic value for structure
- * @flags - miscellaneous control flags
- * @tty - ptr to TTY structure
- * @backup_tty - TTY to use if tty gets closed
* @tbusy - reentrancy flag for tx wakeup code
- * @woke_up - FIXME: describe this field
+ * @woke_up - tx wakeup needs to be run again as it was called while @tbusy
* @tx_buf_list - list of pending transmit frame buffers
* @rx_buf_list - list of received frame buffers
* @tx_free_buf_list - list unused transmit frame buffers
@@ -139,11 +133,8 @@ struct n_hdlc_buf_list {
*/
struct n_hdlc {
int magic;
- __u32 flags;
- struct tty_struct *tty;
- struct tty_struct *backup_tty;
- int tbusy;
- int woke_up;
+ bool tbusy;
+ bool woke_up;
struct n_hdlc_buf_list tx_buf_list;
struct n_hdlc_buf_list rx_buf_list;
struct n_hdlc_buf_list tx_free_buf_list;
@@ -161,39 +152,14 @@ static struct n_hdlc_buf *n_hdlc_buf_get(struct n_hdlc_buf_list *list);
/* Local functions */
-static struct n_hdlc *n_hdlc_alloc (void);
-
-/* debug level can be set by insmod for debugging purposes */
-#define DEBUG_LEVEL_INFO 1
-static int debuglevel;
+static struct n_hdlc *n_hdlc_alloc(void);
/* max frame size for memory allocations */
static int maxframe = 4096;
-/* TTY callbacks */
-
-static ssize_t n_hdlc_tty_read(struct tty_struct *tty, struct file *file,
- __u8 __user *buf, size_t nr);
-static ssize_t n_hdlc_tty_write(struct tty_struct *tty, struct file *file,
- const unsigned char *buf, size_t nr);
-static int n_hdlc_tty_ioctl(struct tty_struct *tty, struct file *file,
- unsigned int cmd, unsigned long arg);
-static __poll_t n_hdlc_tty_poll(struct tty_struct *tty, struct file *filp,
- poll_table *wait);
-static int n_hdlc_tty_open(struct tty_struct *tty);
-static void n_hdlc_tty_close(struct tty_struct *tty);
-static void n_hdlc_tty_receive(struct tty_struct *tty, const __u8 *cp,
- char *fp, int count);
-static void n_hdlc_tty_wakeup(struct tty_struct *tty);
-
-#define bset(p,b) ((p)[(b) >> 5] |= (1 << ((b) & 0x1f)))
-
-#define tty2n_hdlc(tty) ((struct n_hdlc *) ((tty)->disc_data))
-#define n_hdlc2tty(n_hdlc) ((n_hdlc)->tty)
-
static void flush_rx_queue(struct tty_struct *tty)
{
- struct n_hdlc *n_hdlc = tty2n_hdlc(tty);
+ struct n_hdlc *n_hdlc = tty->disc_data;
struct n_hdlc_buf *buf;
while ((buf = n_hdlc_buf_get(&n_hdlc->rx_buf_list)))
@@ -202,79 +168,22 @@ static void flush_rx_queue(struct tty_struct *tty)
static void flush_tx_queue(struct tty_struct *tty)
{
- struct n_hdlc *n_hdlc = tty2n_hdlc(tty);
+ struct n_hdlc *n_hdlc = tty->disc_data;
struct n_hdlc_buf *buf;
while ((buf = n_hdlc_buf_get(&n_hdlc->tx_buf_list)))
n_hdlc_buf_put(&n_hdlc->tx_free_buf_list, buf);
}
-static struct tty_ldisc_ops n_hdlc_ldisc = {
- .owner = THIS_MODULE,
- .magic = TTY_LDISC_MAGIC,
- .name = "hdlc",
- .open = n_hdlc_tty_open,
- .close = n_hdlc_tty_close,
- .read = n_hdlc_tty_read,
- .write = n_hdlc_tty_write,
- .ioctl = n_hdlc_tty_ioctl,
- .poll = n_hdlc_tty_poll,
- .receive_buf = n_hdlc_tty_receive,
- .write_wakeup = n_hdlc_tty_wakeup,
- .flush_buffer = flush_rx_queue,
-};
-
-/**
- * n_hdlc_release - release an n_hdlc per device line discipline info structure
- * @n_hdlc - per device line discipline info structure
- */
-static void n_hdlc_release(struct n_hdlc *n_hdlc)
+static void n_hdlc_free_buf_list(struct n_hdlc_buf_list *list)
{
- struct tty_struct *tty = n_hdlc2tty (n_hdlc);
struct n_hdlc_buf *buf;
-
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)n_hdlc_release() called\n",__FILE__,__LINE__);
-
- /* Ensure that the n_hdlcd process is not hanging on select()/poll() */
- wake_up_interruptible (&tty->read_wait);
- wake_up_interruptible (&tty->write_wait);
-
- if (tty->disc_data == n_hdlc)
- tty->disc_data = NULL; /* Break the tty->n_hdlc link */
-
- /* Release transmit and receive buffers */
- for(;;) {
- buf = n_hdlc_buf_get(&n_hdlc->rx_free_buf_list);
- if (buf) {
- kfree(buf);
- } else
- break;
- }
- for(;;) {
- buf = n_hdlc_buf_get(&n_hdlc->tx_free_buf_list);
- if (buf) {
- kfree(buf);
- } else
- break;
- }
- for(;;) {
- buf = n_hdlc_buf_get(&n_hdlc->rx_buf_list);
- if (buf) {
- kfree(buf);
- } else
- break;
- }
- for(;;) {
- buf = n_hdlc_buf_get(&n_hdlc->tx_buf_list);
- if (buf) {
- kfree(buf);
- } else
- break;
- }
- kfree(n_hdlc);
-
-} /* end of n_hdlc_release() */
+
+ do {
+ buf = n_hdlc_buf_get(list);
+ kfree(buf);
+ } while (buf);
+}
/**
* n_hdlc_tty_close - line discipline close
@@ -285,34 +194,26 @@ static void n_hdlc_release(struct n_hdlc *n_hdlc)
*/
static void n_hdlc_tty_close(struct tty_struct *tty)
{
- struct n_hdlc *n_hdlc = tty2n_hdlc (tty);
-
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)n_hdlc_tty_close() called\n",__FILE__,__LINE__);
-
- if (n_hdlc != NULL) {
- if (n_hdlc->magic != HDLC_MAGIC) {
- printk (KERN_WARNING"n_hdlc: trying to close unopened tty!\n");
- return;
- }
+ struct n_hdlc *n_hdlc = tty->disc_data;
+
+ if (n_hdlc->magic != HDLC_MAGIC) {
+ pr_warn("n_hdlc: trying to close unopened tty!\n");
+ return;
+ }
#if defined(TTY_NO_WRITE_SPLIT)
- clear_bit(TTY_NO_WRITE_SPLIT,&tty->flags);
+ clear_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
#endif
- tty->disc_data = NULL;
- if (tty == n_hdlc->backup_tty)
- n_hdlc->backup_tty = NULL;
- if (tty != n_hdlc->tty)
- return;
- if (n_hdlc->backup_tty) {
- n_hdlc->tty = n_hdlc->backup_tty;
- } else {
- n_hdlc_release (n_hdlc);
- }
- }
-
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)n_hdlc_tty_close() success\n",__FILE__,__LINE__);
-
+ tty->disc_data = NULL;
+
+ /* Ensure that the n_hdlcd process is not hanging on select()/poll() */
+ wake_up_interruptible(&tty->read_wait);
+ wake_up_interruptible(&tty->write_wait);
+
+ n_hdlc_free_buf_list(&n_hdlc->rx_free_buf_list);
+ n_hdlc_free_buf_list(&n_hdlc->tx_free_buf_list);
+ n_hdlc_free_buf_list(&n_hdlc->rx_buf_list);
+ n_hdlc_free_buf_list(&n_hdlc->tx_buf_list);
+ kfree(n_hdlc);
} /* end of n_hdlc_tty_close() */
/**
@@ -321,44 +222,35 @@ static void n_hdlc_tty_close(struct tty_struct *tty)
*
* Returns 0 if success, otherwise error code
*/
-static int n_hdlc_tty_open (struct tty_struct *tty)
+static int n_hdlc_tty_open(struct tty_struct *tty)
{
- struct n_hdlc *n_hdlc = tty2n_hdlc (tty);
+ struct n_hdlc *n_hdlc = tty->disc_data;
+
+ pr_debug("%s() called (device=%s)\n", __func__, tty->name);
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)n_hdlc_tty_open() called (device=%s)\n",
- __FILE__,__LINE__,
- tty->name);
-
/* There should not be an existing table for this slot. */
if (n_hdlc) {
- printk (KERN_ERR"n_hdlc_tty_open:tty already associated!\n" );
+ pr_err("%s: tty already associated!\n", __func__);
return -EEXIST;
}
-
+
n_hdlc = n_hdlc_alloc();
if (!n_hdlc) {
- printk (KERN_ERR "n_hdlc_alloc failed\n");
+ pr_err("%s: n_hdlc_alloc failed\n", __func__);
return -ENFILE;
}
-
+
tty->disc_data = n_hdlc;
- n_hdlc->tty = tty;
tty->receive_room = 65536;
-
-#if defined(TTY_NO_WRITE_SPLIT)
+
/* change tty_io write() to not split large writes into 8K chunks */
- set_bit(TTY_NO_WRITE_SPLIT,&tty->flags);
-#endif
-
+ set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
+
/* flush receive data from driver */
tty_driver_flush_buffer(tty);
-
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)n_hdlc_tty_open() success\n",__FILE__,__LINE__);
-
+
return 0;
-
+
} /* end of n_tty_hdlc_open() */
/**
@@ -376,26 +268,22 @@ static void n_hdlc_send_frames(struct n_hdlc *n_hdlc, struct tty_struct *tty)
unsigned long flags;
struct n_hdlc_buf *tbuf;
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)n_hdlc_send_frames() called\n",__FILE__,__LINE__);
- check_again:
-
- spin_lock_irqsave(&n_hdlc->tx_buf_list.spinlock, flags);
+check_again:
+
+ spin_lock_irqsave(&n_hdlc->tx_buf_list.spinlock, flags);
if (n_hdlc->tbusy) {
- n_hdlc->woke_up = 1;
- spin_unlock_irqrestore(&n_hdlc->tx_buf_list.spinlock, flags);
+ n_hdlc->woke_up = true;
+ spin_unlock_irqrestore(&n_hdlc->tx_buf_list.spinlock, flags);
return;
}
- n_hdlc->tbusy = 1;
- n_hdlc->woke_up = 0;
+ n_hdlc->tbusy = true;
+ n_hdlc->woke_up = false;
spin_unlock_irqrestore(&n_hdlc->tx_buf_list.spinlock, flags);
tbuf = n_hdlc_buf_get(&n_hdlc->tx_buf_list);
while (tbuf) {
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)sending frame %p, count=%d\n",
- __FILE__,__LINE__,tbuf,tbuf->count);
-
+ pr_debug("sending frame %p, count=%d\n", tbuf, tbuf->count);
+
/* Send the next block of data to device */
set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
actual = tty->ops->write(tty, tbuf->buf, tbuf->count);
@@ -409,24 +297,20 @@ static void n_hdlc_send_frames(struct n_hdlc *n_hdlc, struct tty_struct *tty)
/* pretending it was accepted by driver */
if (actual < 0)
actual = tbuf->count;
-
+
if (actual == tbuf->count) {
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)frame %p completed\n",
- __FILE__,__LINE__,tbuf);
-
+ pr_debug("frame %p completed\n", tbuf);
+
/* free current transmit buffer */
n_hdlc_buf_put(&n_hdlc->tx_free_buf_list, tbuf);
/* wait up sleeping writers */
wake_up_interruptible(&tty->write_wait);
-
+
/* get next pending transmit buffer */
tbuf = n_hdlc_buf_get(&n_hdlc->tx_buf_list);
} else {
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)frame %p pending\n",
- __FILE__,__LINE__,tbuf);
+ pr_debug("frame %p pending\n", tbuf);
/*
* the buffer was not accepted by driver,
@@ -436,21 +320,17 @@ static void n_hdlc_send_frames(struct n_hdlc *n_hdlc, struct tty_struct *tty)
break;
}
}
-
+
if (!tbuf)
clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
-
+
/* Clear the re-entry flag */
spin_lock_irqsave(&n_hdlc->tx_buf_list.spinlock, flags);
- n_hdlc->tbusy = 0;
- spin_unlock_irqrestore(&n_hdlc->tx_buf_list.spinlock, flags);
-
- if (n_hdlc->woke_up)
- goto check_again;
-
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)n_hdlc_send_frames() exit\n",__FILE__,__LINE__);
-
+ n_hdlc->tbusy = false;
+ spin_unlock_irqrestore(&n_hdlc->tx_buf_list.spinlock, flags);
+
+ if (n_hdlc->woke_up)
+ goto check_again;
} /* end of n_hdlc_send_frames() */
/**
@@ -461,21 +341,9 @@ static void n_hdlc_send_frames(struct n_hdlc *n_hdlc, struct tty_struct *tty)
*/
static void n_hdlc_tty_wakeup(struct tty_struct *tty)
{
- struct n_hdlc *n_hdlc = tty2n_hdlc(tty);
+ struct n_hdlc *n_hdlc = tty->disc_data;
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)n_hdlc_tty_wakeup() called\n",__FILE__,__LINE__);
-
- if (!n_hdlc)
- return;
-
- if (tty != n_hdlc->tty) {
- clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
- return;
- }
-
- n_hdlc_send_frames (n_hdlc, tty);
-
+ n_hdlc_send_frames(n_hdlc, tty);
} /* end of n_hdlc_tty_wakeup() */
/**
@@ -491,59 +359,50 @@ static void n_hdlc_tty_wakeup(struct tty_struct *tty)
static void n_hdlc_tty_receive(struct tty_struct *tty, const __u8 *data,
char *flags, int count)
{
- register struct n_hdlc *n_hdlc = tty2n_hdlc (tty);
+ register struct n_hdlc *n_hdlc = tty->disc_data;
register struct n_hdlc_buf *buf;
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)n_hdlc_tty_receive() called count=%d\n",
- __FILE__,__LINE__, count);
-
- /* This can happen if stuff comes in on the backup tty */
- if (!n_hdlc || tty != n_hdlc->tty)
- return;
-
+ pr_debug("%s() called count=%d\n", __func__, count);
+
/* verify line is using HDLC discipline */
if (n_hdlc->magic != HDLC_MAGIC) {
- printk("%s(%d) line not using HDLC discipline\n",
- __FILE__,__LINE__);
+ pr_err("line not using HDLC discipline\n");
return;
}
-
- if ( count>maxframe ) {
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d) rx count>maxframesize, data discarded\n",
- __FILE__,__LINE__);
+
+ if (count > maxframe) {
+ pr_debug("rx count>maxframesize, data discarded\n");
return;
}
- /* get a free HDLC buffer */
+ /* get a free HDLC buffer */
buf = n_hdlc_buf_get(&n_hdlc->rx_free_buf_list);
if (!buf) {
- /* no buffers in free list, attempt to allocate another rx buffer */
- /* unless the maximum count has been reached */
+ /*
+ * no buffers in free list, attempt to allocate another rx
+ * buffer unless the maximum count has been reached
+ */
if (n_hdlc->rx_buf_list.count < MAX_RX_BUF_COUNT)
buf = kmalloc(struct_size(buf, buf, maxframe),
GFP_ATOMIC);
}
-
+
if (!buf) {
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d) no more rx buffers, data discarded\n",
- __FILE__,__LINE__);
+ pr_debug("no more rx buffers, data discarded\n");
return;
}
-
+
/* copy received data to HDLC buffer */
- memcpy(buf->buf,data,count);
- buf->count=count;
+ memcpy(buf->buf, data, count);
+ buf->count = count;
/* add HDLC buffer to list of received frames */
n_hdlc_buf_put(&n_hdlc->rx_buf_list, buf);
-
+
/* wake up any blocked reads and perform async signalling */
- wake_up_interruptible (&tty->read_wait);
- if (n_hdlc->tty->fasync != NULL)
- kill_fasync (&n_hdlc->tty->fasync, SIGIO, POLL_IN);
+ wake_up_interruptible(&tty->read_wait);
+ if (tty->fasync != NULL)
+ kill_fasync(&tty->fasync, SIGIO, POLL_IN);
} /* end of n_hdlc_tty_receive() */
@@ -553,28 +412,21 @@ static void n_hdlc_tty_receive(struct tty_struct *tty, const __u8 *data,
* @file - pointer to open file object
* @buf - pointer to returned data buffer
* @nr - size of returned data buffer
- *
+ *
* Returns the number of bytes returned or error code.
*/
static ssize_t n_hdlc_tty_read(struct tty_struct *tty, struct file *file,
__u8 __user *buf, size_t nr)
{
- struct n_hdlc *n_hdlc = tty2n_hdlc(tty);
+ struct n_hdlc *n_hdlc = tty->disc_data;
int ret = 0;
struct n_hdlc_buf *rbuf;
DECLARE_WAITQUEUE(wait, current);
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)n_hdlc_tty_read() called\n",__FILE__,__LINE__);
-
- /* Validate the pointers */
- if (!n_hdlc)
- return -EIO;
-
/* verify user access to buffer */
if (!access_ok(buf, nr)) {
- printk(KERN_WARNING "%s(%d) n_hdlc_tty_read() can't verify user "
- "buffer\n", __FILE__, __LINE__);
+ pr_warn("%s(%d) %s() can't verify user buffer\n",
+ __FILE__, __LINE__, __func__);
return -EFAULT;
}
@@ -610,7 +462,7 @@ static ssize_t n_hdlc_tty_read(struct tty_struct *tty, struct file *file,
n_hdlc_buf_put(&n_hdlc->rx_free_buf_list, rbuf);
break;
}
-
+
/* no data */
if (tty_io_nonblock(tty, file)) {
ret = -EAGAIN;
@@ -629,7 +481,7 @@ static ssize_t n_hdlc_tty_read(struct tty_struct *tty, struct file *file,
__set_current_state(TASK_RUNNING);
return ret;
-
+
} /* end of n_hdlc_tty_read() */
/**
@@ -638,43 +490,34 @@ static ssize_t n_hdlc_tty_read(struct tty_struct *tty, struct file *file,
* @file - pointer to file object data
* @data - pointer to transmit data (one frame)
* @count - size of transmit frame in bytes
- *
+ *
* Returns the number of bytes written (or error code).
*/
static ssize_t n_hdlc_tty_write(struct tty_struct *tty, struct file *file,
const unsigned char *data, size_t count)
{
- struct n_hdlc *n_hdlc = tty2n_hdlc (tty);
+ struct n_hdlc *n_hdlc = tty->disc_data;
int error = 0;
DECLARE_WAITQUEUE(wait, current);
struct n_hdlc_buf *tbuf;
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)n_hdlc_tty_write() called count=%zd\n",
- __FILE__,__LINE__,count);
-
- /* Verify pointers */
- if (!n_hdlc)
- return -EIO;
+ pr_debug("%s() called count=%zd\n", __func__, count);
if (n_hdlc->magic != HDLC_MAGIC)
return -EIO;
/* verify frame size */
- if (count > maxframe ) {
- if (debuglevel & DEBUG_LEVEL_INFO)
- printk (KERN_WARNING
- "n_hdlc_tty_write: truncating user packet "
- "from %lu to %d\n", (unsigned long) count,
- maxframe );
+ if (count > maxframe) {
+ pr_debug("%s: truncating user packet from %zu to %d\n",
+ __func__, count, maxframe);
count = maxframe;
}
-
+
add_wait_queue(&tty->write_wait, &wait);
for (;;) {
set_current_state(TASK_INTERRUPTIBLE);
-
+
tbuf = n_hdlc_buf_get(&n_hdlc->tx_free_buf_list);
if (tbuf)
break;
@@ -684,15 +527,7 @@ static ssize_t n_hdlc_tty_write(struct tty_struct *tty, struct file *file,
break;
}
schedule();
-
- n_hdlc = tty2n_hdlc (tty);
- if (!n_hdlc || n_hdlc->magic != HDLC_MAGIC ||
- tty != n_hdlc->tty) {
- printk("n_hdlc_tty_write: %p invalid after wait!\n", n_hdlc);
- error = -EIO;
- break;
- }
-
+
if (signal_pending(current)) {
error = -EINTR;
break;
@@ -702,18 +537,18 @@ static ssize_t n_hdlc_tty_write(struct tty_struct *tty, struct file *file,
__set_current_state(TASK_RUNNING);
remove_wait_queue(&tty->write_wait, &wait);
- if (!error) {
+ if (!error) {
/* Retrieve the user's buffer */
memcpy(tbuf->buf, data, count);
/* Send the data */
tbuf->count = error = count;
- n_hdlc_buf_put(&n_hdlc->tx_buf_list,tbuf);
- n_hdlc_send_frames(n_hdlc,tty);
+ n_hdlc_buf_put(&n_hdlc->tx_buf_list, tbuf);
+ n_hdlc_send_frames(n_hdlc, tty);
}
return error;
-
+
} /* end of n_hdlc_tty_write() */
/**
@@ -728,32 +563,30 @@ static ssize_t n_hdlc_tty_write(struct tty_struct *tty, struct file *file,
static int n_hdlc_tty_ioctl(struct tty_struct *tty, struct file *file,
unsigned int cmd, unsigned long arg)
{
- struct n_hdlc *n_hdlc = tty2n_hdlc (tty);
+ struct n_hdlc *n_hdlc = tty->disc_data;
int error = 0;
int count;
unsigned long flags;
struct n_hdlc_buf *buf = NULL;
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)n_hdlc_tty_ioctl() called %d\n",
- __FILE__,__LINE__,cmd);
-
+ pr_debug("%s() called %d\n", __func__, cmd);
+
/* Verify the status of the device */
- if (!n_hdlc || n_hdlc->magic != HDLC_MAGIC)
+ if (n_hdlc->magic != HDLC_MAGIC)
return -EBADF;
switch (cmd) {
case FIONREAD:
/* report count of read data available */
/* in next available frame (if any) */
- spin_lock_irqsave(&n_hdlc->rx_buf_list.spinlock,flags);
+ spin_lock_irqsave(&n_hdlc->rx_buf_list.spinlock, flags);
buf = list_first_entry_or_null(&n_hdlc->rx_buf_list.list,
struct n_hdlc_buf, list_item);
if (buf)
count = buf->count;
else
count = 0;
- spin_unlock_irqrestore(&n_hdlc->rx_buf_list.spinlock,flags);
+ spin_unlock_irqrestore(&n_hdlc->rx_buf_list.spinlock, flags);
error = put_user(count, (int __user *)arg);
break;
@@ -761,12 +594,12 @@ static int n_hdlc_tty_ioctl(struct tty_struct *tty, struct file *file,
/* get the pending tx byte count in the driver */
count = tty_chars_in_buffer(tty);
/* add size of next output frame in queue */
- spin_lock_irqsave(&n_hdlc->tx_buf_list.spinlock,flags);
+ spin_lock_irqsave(&n_hdlc->tx_buf_list.spinlock, flags);
buf = list_first_entry_or_null(&n_hdlc->tx_buf_list.list,
struct n_hdlc_buf, list_item);
if (buf)
count += buf->count;
- spin_unlock_irqrestore(&n_hdlc->tx_buf_list.spinlock,flags);
+ spin_unlock_irqrestore(&n_hdlc->tx_buf_list.spinlock, flags);
error = put_user(count, (int __user *)arg);
break;
@@ -783,7 +616,7 @@ static int n_hdlc_tty_ioctl(struct tty_struct *tty, struct file *file,
break;
}
return error;
-
+
} /* end of n_hdlc_tty_ioctl() */
/**
@@ -791,7 +624,7 @@ static int n_hdlc_tty_ioctl(struct tty_struct *tty, struct file *file,
* @tty - pointer to tty instance data
* @filp - pointer to open file object for device
* @poll_table - wait queue for operations
- *
+ *
* Determine which operations (read/write) will not block and return info
* to caller.
* Returns a bit mask containing info on which ops will not block.
@@ -799,33 +632,50 @@ static int n_hdlc_tty_ioctl(struct tty_struct *tty, struct file *file,
static __poll_t n_hdlc_tty_poll(struct tty_struct *tty, struct file *filp,
poll_table *wait)
{
- struct n_hdlc *n_hdlc = tty2n_hdlc (tty);
+ struct n_hdlc *n_hdlc = tty->disc_data;
__poll_t mask = 0;
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)n_hdlc_tty_poll() called\n",__FILE__,__LINE__);
-
- if (n_hdlc && n_hdlc->magic == HDLC_MAGIC && tty == n_hdlc->tty) {
- /* queue current process into any wait queue that */
- /* may awaken in the future (read and write) */
-
- poll_wait(filp, &tty->read_wait, wait);
- poll_wait(filp, &tty->write_wait, wait);
-
- /* set bits for operations that won't block */
- if (!list_empty(&n_hdlc->rx_buf_list.list))
- mask |= EPOLLIN | EPOLLRDNORM; /* readable */
- if (test_bit(TTY_OTHER_CLOSED, &tty->flags))
- mask |= EPOLLHUP;
- if (tty_hung_up_p(filp))
- mask |= EPOLLHUP;
- if (!tty_is_writelocked(tty) &&
- !list_empty(&n_hdlc->tx_free_buf_list.list))
- mask |= EPOLLOUT | EPOLLWRNORM; /* writable */
- }
+ if (n_hdlc->magic != HDLC_MAGIC)
+ return 0;
+
+ /*
+ * queue the current process into any wait queue that may awaken in the
+ * future (read and write)
+ */
+ poll_wait(filp, &tty->read_wait, wait);
+ poll_wait(filp, &tty->write_wait, wait);
+
+ /* set bits for operations that won't block */
+ if (!list_empty(&n_hdlc->rx_buf_list.list))
+ mask |= EPOLLIN | EPOLLRDNORM; /* readable */
+ if (test_bit(TTY_OTHER_CLOSED, &tty->flags))
+ mask |= EPOLLHUP;
+ if (tty_hung_up_p(filp))
+ mask |= EPOLLHUP;
+ if (!tty_is_writelocked(tty) &&
+ !list_empty(&n_hdlc->tx_free_buf_list.list))
+ mask |= EPOLLOUT | EPOLLWRNORM; /* writable */
+
return mask;
} /* end of n_hdlc_tty_poll() */
+static void n_hdlc_alloc_buf(struct n_hdlc_buf_list *list, unsigned int count,
+ const char *name)
+{
+ struct n_hdlc_buf *buf;
+ unsigned int i;
+
+ for (i = 0; i < count; i++) {
+ buf = kmalloc(struct_size(buf, buf, maxframe), GFP_KERNEL);
+ if (!buf) {
+ pr_debug("%s(), kmalloc() failed for %s buffer %u\n",
+ __func__, name, i);
+ return;
+ }
+ n_hdlc_buf_put(list, buf);
+ }
+}
+
/**
* n_hdlc_alloc - allocate an n_hdlc instance data structure
*
@@ -833,8 +683,6 @@ static __poll_t n_hdlc_tty_poll(struct tty_struct *tty, struct file *filp,
*/
static struct n_hdlc *n_hdlc_alloc(void)
{
- struct n_hdlc_buf *buf;
- int i;
struct n_hdlc *n_hdlc = kzalloc(sizeof(*n_hdlc), GFP_KERNEL);
if (!n_hdlc)
@@ -850,30 +698,14 @@ static struct n_hdlc *n_hdlc_alloc(void)
INIT_LIST_HEAD(&n_hdlc->rx_buf_list.list);
INIT_LIST_HEAD(&n_hdlc->tx_buf_list.list);
- /* allocate free rx buffer list */
- for(i=0;i<DEFAULT_RX_BUF_COUNT;i++) {
- buf = kmalloc(struct_size(buf, buf, maxframe), GFP_KERNEL);
- if (buf)
- n_hdlc_buf_put(&n_hdlc->rx_free_buf_list,buf);
- else if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)n_hdlc_alloc(), kalloc() failed for rx buffer %d\n",__FILE__,__LINE__, i);
- }
-
- /* allocate free tx buffer list */
- for(i=0;i<DEFAULT_TX_BUF_COUNT;i++) {
- buf = kmalloc(struct_size(buf, buf, maxframe), GFP_KERNEL);
- if (buf)
- n_hdlc_buf_put(&n_hdlc->tx_free_buf_list,buf);
- else if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)n_hdlc_alloc(), kalloc() failed for tx buffer %d\n",__FILE__,__LINE__, i);
- }
-
+ n_hdlc_alloc_buf(&n_hdlc->rx_free_buf_list, DEFAULT_RX_BUF_COUNT, "rx");
+ n_hdlc_alloc_buf(&n_hdlc->tx_free_buf_list, DEFAULT_TX_BUF_COUNT, "tx");
+
/* Initialize the control block */
n_hdlc->magic = HDLC_MAGIC;
- n_hdlc->flags = 0;
-
+
return n_hdlc;
-
+
} /* end of n_hdlc_alloc() */
/**
@@ -915,7 +747,7 @@ static void n_hdlc_buf_put(struct n_hdlc_buf_list *buf_list,
/**
* n_hdlc_buf_get - remove and return an HDLC buffer from list
* @buf_list - pointer to HDLC buffer list
- *
+ *
* Remove and return an HDLC buffer from the head of the specified HDLC buffer
* list.
* Returns a pointer to HDLC buffer if available, otherwise %NULL.
@@ -938,44 +770,39 @@ static struct n_hdlc_buf *n_hdlc_buf_get(struct n_hdlc_buf_list *buf_list)
return buf;
} /* end of n_hdlc_buf_get() */
-static const char hdlc_banner[] __initconst =
- KERN_INFO "HDLC line discipline maxframe=%u\n";
-static const char hdlc_register_ok[] __initconst =
- KERN_INFO "N_HDLC line discipline registered.\n";
-static const char hdlc_register_fail[] __initconst =
- KERN_ERR "error registering line discipline: %d\n";
+static struct tty_ldisc_ops n_hdlc_ldisc = {
+ .owner = THIS_MODULE,
+ .magic = TTY_LDISC_MAGIC,
+ .name = "hdlc",
+ .open = n_hdlc_tty_open,
+ .close = n_hdlc_tty_close,
+ .read = n_hdlc_tty_read,
+ .write = n_hdlc_tty_write,
+ .ioctl = n_hdlc_tty_ioctl,
+ .poll = n_hdlc_tty_poll,
+ .receive_buf = n_hdlc_tty_receive,
+ .write_wakeup = n_hdlc_tty_wakeup,
+ .flush_buffer = flush_rx_queue,
+};
static int __init n_hdlc_init(void)
{
int status;
/* range check maxframe arg */
- if (maxframe < 4096)
- maxframe = 4096;
- else if (maxframe > 65535)
- maxframe = 65535;
-
- printk(hdlc_banner, maxframe);
+ maxframe = clamp(maxframe, 4096, MAX_HDLC_FRAME_SIZE);
status = tty_register_ldisc(N_HDLC, &n_hdlc_ldisc);
if (!status)
- printk(hdlc_register_ok);
+ pr_info("N_HDLC line discipline registered with maxframe=%d\n",
+ maxframe);
else
- printk(hdlc_register_fail, status);
+ pr_err("N_HDLC: error registering line discipline: %d\n",
+ status);
return status;
-
-} /* end of init_module() */
-
-#ifdef CONFIG_SPARC
-#undef __exitdata
-#define __exitdata
-#endif
-static const char hdlc_unregister_ok[] __exitdata =
- KERN_INFO "N_HDLC: line discipline unregistered\n";
-static const char hdlc_unregister_fail[] __exitdata =
- KERN_ERR "N_HDLC: can't unregister line discipline (err = %d)\n";
+} /* end of init_module() */
static void __exit n_hdlc_exit(void)
{
@@ -983,9 +810,10 @@ static void __exit n_hdlc_exit(void)
int status = tty_unregister_ldisc(N_HDLC);
if (status)
- printk(hdlc_unregister_fail, status);
+ pr_err("N_HDLC: can't unregister line discipline (err = %d)\n",
+ status);
else
- printk(hdlc_unregister_ok);
+ pr_info("N_HDLC: line discipline unregistered\n");
}
module_init(n_hdlc_init);
@@ -993,6 +821,5 @@ module_exit(n_hdlc_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Paul Fulghum paulkf@microgate.com");
-module_param(debuglevel, int, 0);
module_param(maxframe, int, 0);
MODULE_ALIAS_LDISC(N_HDLC);
diff --git a/drivers/tty/n_tracesink.h b/drivers/tty/n_tracesink.h
index 1b846330c855..7031d515a700 100644
--- a/drivers/tty/n_tracesink.h
+++ b/drivers/tty/n_tracesink.h
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0
+/* SPDX-License-Identifier: GPL-2.0 */
/*
* n_tracesink.h - Kernel driver API to route trace data in kernel space.
*
diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index f9c584244f72..1794d84e7bf6 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -84,7 +84,7 @@
#ifdef N_TTY_TRACE
# define n_tty_trace(f, args...) trace_printk(f, ##args)
#else
-# define n_tty_trace(f, args...)
+# define n_tty_trace(f, args...) no_printk(f, ##args)
#endif
struct n_tty_data {
@@ -654,9 +654,9 @@ static size_t __process_echoes(struct tty_struct *tty)
op = echo_buf(ldata, tail + 1);
switch (op) {
+ case ECHO_OP_ERASE_TAB: {
unsigned int num_chars, num_bs;
- case ECHO_OP_ERASE_TAB:
if (MASK(ldata->echo_commit) == MASK(tail + 2))
goto not_yet_stored;
num_chars = echo_buf(ldata, tail + 2);
@@ -687,7 +687,7 @@ static size_t __process_echoes(struct tty_struct *tty)
}
tail += 3;
break;
-
+ }
case ECHO_OP_SET_CANON_COL:
ldata->canon_column = ldata->column;
tail += 2;
diff --git a/drivers/tty/nozomi.c b/drivers/tty/nozomi.c
index ed99948f3b7f..d42b854cb7df 100644
--- a/drivers/tty/nozomi.c
+++ b/drivers/tty/nozomi.c
@@ -301,7 +301,7 @@ struct ctrl_dl {
unsigned int DCD:1;
unsigned int RI:1;
unsigned int CTS:1;
- unsigned int reserverd:4;
+ unsigned int reserved:4;
u8 port;
} __attribute__ ((packed));
@@ -839,40 +839,39 @@ static char *interrupt2str(u16 interrupt)
static char buf[TMP_BUF_MAX];
char *p = buf;
- interrupt & MDM_DL1 ? p += snprintf(p, TMP_BUF_MAX, "MDM_DL1 ") : NULL;
- interrupt & MDM_DL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
- "MDM_DL2 ") : NULL;
-
- interrupt & MDM_UL1 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
- "MDM_UL1 ") : NULL;
- interrupt & MDM_UL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
- "MDM_UL2 ") : NULL;
-
- interrupt & DIAG_DL1 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
- "DIAG_DL1 ") : NULL;
- interrupt & DIAG_DL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
- "DIAG_DL2 ") : NULL;
-
- interrupt & DIAG_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
- "DIAG_UL ") : NULL;
-
- interrupt & APP1_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
- "APP1_DL ") : NULL;
- interrupt & APP2_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
- "APP2_DL ") : NULL;
-
- interrupt & APP1_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
- "APP1_UL ") : NULL;
- interrupt & APP2_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
- "APP2_UL ") : NULL;
-
- interrupt & CTRL_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
- "CTRL_DL ") : NULL;
- interrupt & CTRL_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
- "CTRL_UL ") : NULL;
-
- interrupt & RESET ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
- "RESET ") : NULL;
+ if (interrupt & MDM_DL1)
+ p += scnprintf(p, TMP_BUF_MAX, "MDM_DL1 ");
+ if (interrupt & MDM_DL2)
+ p += scnprintf(p, TMP_BUF_MAX - (p - buf), "MDM_DL2 ");
+ if (interrupt & MDM_UL1)
+ p += scnprintf(p, TMP_BUF_MAX - (p - buf), "MDM_UL1 ");
+ if (interrupt & MDM_UL2)
+ p += scnprintf(p, TMP_BUF_MAX - (p - buf), "MDM_UL2 ");
+ if (interrupt & DIAG_DL1)
+ p += scnprintf(p, TMP_BUF_MAX - (p - buf), "DIAG_DL1 ");
+ if (interrupt & DIAG_DL2)
+ p += scnprintf(p, TMP_BUF_MAX - (p - buf), "DIAG_DL2 ");
+
+ if (interrupt & DIAG_UL)
+ p += scnprintf(p, TMP_BUF_MAX - (p - buf), "DIAG_UL ");
+
+ if (interrupt & APP1_DL)
+ p += scnprintf(p, TMP_BUF_MAX - (p - buf), "APP1_DL ");
+ if (interrupt & APP2_DL)
+ p += scnprintf(p, TMP_BUF_MAX - (p - buf), "APP2_DL ");
+
+ if (interrupt & APP1_UL)
+ p += scnprintf(p, TMP_BUF_MAX - (p - buf), "APP1_UL ");
+ if (interrupt & APP2_UL)
+ p += scnprintf(p, TMP_BUF_MAX - (p - buf), "APP2_UL ");
+
+ if (interrupt & CTRL_DL)
+ p += scnprintf(p, TMP_BUF_MAX - (p - buf), "CTRL_DL ");
+ if (interrupt & CTRL_UL)
+ p += scnprintf(p, TMP_BUF_MAX - (p - buf), "CTRL_UL ");
+
+ if (interrupt & RESET)
+ p += scnprintf(p, TMP_BUF_MAX - (p - buf), "RESET ");
return buf;
}
diff --git a/drivers/tty/serial/8250/8250.h b/drivers/tty/serial/8250/8250.h
index 33ad9d6de532..52bb21205bb6 100644
--- a/drivers/tty/serial/8250/8250.h
+++ b/drivers/tty/serial/8250/8250.h
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0+
+/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Driver for 8250/16550-type serial ports
*
@@ -156,7 +156,9 @@ void serial8250_rpm_put(struct uart_8250_port *p);
void serial8250_rpm_get_tx(struct uart_8250_port *p);
void serial8250_rpm_put_tx(struct uart_8250_port *p);
-int serial8250_em485_init(struct uart_8250_port *p);
+int serial8250_em485_config(struct uart_port *port, struct serial_rs485 *rs485);
+void serial8250_em485_start_tx(struct uart_8250_port *p);
+void serial8250_em485_stop_tx(struct uart_8250_port *p);
void serial8250_em485_destroy(struct uart_8250_port *p);
/* MCR <-> TIOCM conversion */
diff --git a/drivers/tty/serial/8250/8250_bcm2835aux.c b/drivers/tty/serial/8250/8250_bcm2835aux.c
index e70e3cc30050..12d03e678295 100644
--- a/drivers/tty/serial/8250/8250_bcm2835aux.c
+++ b/drivers/tty/serial/8250/8250_bcm2835aux.c
@@ -6,6 +6,10 @@
*
* Based on 8250_lpc18xx.c:
* Copyright (C) 2015 Joachim Eastwood <manabian@gmail.com>
+ *
+ * The bcm2835aux is capable of RTS auto flow-control, but this driver doesn't
+ * take advantage of it yet. When adding support, be sure not to enable it
+ * simultaneously to rs485.
*/
#include <linux/clk.h>
@@ -16,16 +20,64 @@
#include "8250.h"
+#define BCM2835_AUX_UART_CNTL 8
+#define BCM2835_AUX_UART_CNTL_RXEN 0x01 /* Receiver enable */
+#define BCM2835_AUX_UART_CNTL_TXEN 0x02 /* Transmitter enable */
+#define BCM2835_AUX_UART_CNTL_AUTORTS 0x04 /* RTS set by RX fill level */
+#define BCM2835_AUX_UART_CNTL_AUTOCTS 0x08 /* CTS stops transmitter */
+#define BCM2835_AUX_UART_CNTL_RTS3 0x00 /* RTS set until 3 chars left */
+#define BCM2835_AUX_UART_CNTL_RTS2 0x10 /* RTS set until 2 chars left */
+#define BCM2835_AUX_UART_CNTL_RTS1 0x20 /* RTS set until 1 chars left */
+#define BCM2835_AUX_UART_CNTL_RTS4 0x30 /* RTS set until 4 chars left */
+#define BCM2835_AUX_UART_CNTL_RTSINV 0x40 /* Invert auto RTS polarity */
+#define BCM2835_AUX_UART_CNTL_CTSINV 0x80 /* Invert auto CTS polarity */
+
/**
* struct bcm2835aux_data - driver private data of BCM2835 auxiliary UART
* @clk: clock producer of the port's uartclk
* @line: index of the port's serial8250_ports[] entry
+ * @cntl: cached copy of CNTL register
*/
struct bcm2835aux_data {
struct clk *clk;
int line;
+ u32 cntl;
};
+static void bcm2835aux_rs485_start_tx(struct uart_8250_port *up)
+{
+ if (!(up->port.rs485.flags & SER_RS485_RX_DURING_TX)) {
+ struct bcm2835aux_data *data = dev_get_drvdata(up->port.dev);
+
+ data->cntl &= ~BCM2835_AUX_UART_CNTL_RXEN;
+ serial_out(up, BCM2835_AUX_UART_CNTL, data->cntl);
+ }
+
+ /*
+ * On the bcm2835aux, the MCR register contains no other
+ * flags besides RTS. So no need for a read-modify-write.
+ */
+ if (up->port.rs485.flags & SER_RS485_RTS_ON_SEND)
+ serial8250_out_MCR(up, 0);
+ else
+ serial8250_out_MCR(up, UART_MCR_RTS);
+}
+
+static void bcm2835aux_rs485_stop_tx(struct uart_8250_port *up)
+{
+ if (up->port.rs485.flags & SER_RS485_RTS_AFTER_SEND)
+ serial8250_out_MCR(up, 0);
+ else
+ serial8250_out_MCR(up, UART_MCR_RTS);
+
+ if (!(up->port.rs485.flags & SER_RS485_RX_DURING_TX)) {
+ struct bcm2835aux_data *data = dev_get_drvdata(up->port.dev);
+
+ data->cntl |= BCM2835_AUX_UART_CNTL_RXEN;
+ serial_out(up, BCM2835_AUX_UART_CNTL, data->cntl);
+ }
+}
+
static int bcm2835aux_serial_probe(struct platform_device *pdev)
{
struct uart_8250_port up = { };
@@ -47,6 +99,14 @@ static int bcm2835aux_serial_probe(struct platform_device *pdev)
up.port.fifosize = 8;
up.port.flags = UPF_SHARE_IRQ | UPF_FIXED_PORT | UPF_FIXED_TYPE |
UPF_SKIP_TEST | UPF_IOREMAP;
+ up.port.rs485_config = serial8250_em485_config;
+ up.rs485_start_tx = bcm2835aux_rs485_start_tx;
+ up.rs485_stop_tx = bcm2835aux_rs485_stop_tx;
+
+ /* initialize cached copy with power-on reset value */
+ data->cntl = BCM2835_AUX_UART_CNTL_RXEN | BCM2835_AUX_UART_CNTL_TXEN;
+
+ platform_set_drvdata(pdev, data);
/* get the clock - this also enables the HW */
data->clk = devm_clk_get(&pdev->dev, NULL);
@@ -102,8 +162,6 @@ static int bcm2835aux_serial_probe(struct platform_device *pdev)
}
data->line = ret;
- platform_set_drvdata(pdev, data);
-
return 0;
dis_clk:
@@ -137,6 +195,24 @@ static struct platform_driver bcm2835aux_serial_driver = {
};
module_platform_driver(bcm2835aux_serial_driver);
+#ifdef CONFIG_SERIAL_8250_CONSOLE
+
+static int __init early_bcm2835aux_setup(struct earlycon_device *device,
+ const char *options)
+{
+ if (!device->port.membase)
+ return -ENODEV;
+
+ device->port.iotype = UPIO_MEM32;
+ device->port.regshift = 2;
+
+ return early_serial8250_setup(device, NULL);
+}
+
+OF_EARLYCON_DECLARE(bcm2835aux, "brcm,bcm2835-aux-uart",
+ early_bcm2835aux_setup);
+#endif
+
MODULE_DESCRIPTION("BCM2835 auxiliar UART driver");
MODULE_AUTHOR("Martin Sperl <kernel@martin.sperl.org>");
MODULE_LICENSE("GPL v2");
diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c
index f2a33c9082a6..45d9117cab68 100644
--- a/drivers/tty/serial/8250/8250_core.c
+++ b/drivers/tty/serial/8250/8250_core.c
@@ -608,6 +608,14 @@ static int univ8250_console_setup(struct console *co, char *options)
return retval;
}
+static int univ8250_console_exit(struct console *co)
+{
+ struct uart_port *port;
+
+ port = &serial8250_ports[co->index].port;
+ return serial8250_console_exit(port);
+}
+
/**
* univ8250_console_match - non-standard console matching
* @co: registering console
@@ -666,6 +674,7 @@ static struct console univ8250_console = {
.write = univ8250_console_write,
.device = uart_console_device,
.setup = univ8250_console_setup,
+ .exit = univ8250_console_exit,
.match = univ8250_console_match,
.flags = CON_PRINTBUFFER | CON_ANYTIME,
.index = -1,
@@ -1007,14 +1016,18 @@ int serial8250_register_8250_port(struct uart_8250_port *up)
uart->port.unthrottle = up->port.unthrottle;
uart->port.rs485_config = up->port.rs485_config;
uart->port.rs485 = up->port.rs485;
+ uart->rs485_start_tx = up->rs485_start_tx;
+ uart->rs485_stop_tx = up->rs485_stop_tx;
uart->dma = up->dma;
/* Take tx_loadsz from fifosize if it wasn't set separately */
if (uart->port.fifosize && !uart->tx_loadsz)
uart->tx_loadsz = uart->port.fifosize;
- if (up->port.dev)
+ if (up->port.dev) {
uart->port.dev = up->port.dev;
+ uart_get_rs485_mode(uart->port.dev, &uart->port.rs485);
+ }
if (up->port.flags & UPF_FIXED_TYPE)
uart->port.type = up->port.type;
diff --git a/drivers/tty/serial/8250/8250_dwlib.h b/drivers/tty/serial/8250/8250_dwlib.h
index 87a4db2a8aba..9a12953832d3 100644
--- a/drivers/tty/serial/8250/8250_dwlib.h
+++ b/drivers/tty/serial/8250/8250_dwlib.h
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0+
+/* SPDX-License-Identifier: GPL-2.0+ */
/* Synopsys DesignWare 8250 library header file. */
#include <linux/types.h>
diff --git a/drivers/tty/serial/8250/8250_exar.c b/drivers/tty/serial/8250/8250_exar.c
index d330da76d6b6..59449b6500cd 100644
--- a/drivers/tty/serial/8250/8250_exar.c
+++ b/drivers/tty/serial/8250/8250_exar.c
@@ -135,7 +135,7 @@ struct exar8250 {
unsigned int nr;
struct exar8250_board *board;
void __iomem *virt;
- int line[0];
+ int line[];
};
static void exar_pm(struct uart_port *port, unsigned int state, unsigned int old)
diff --git a/drivers/tty/serial/8250/8250_lpss.c b/drivers/tty/serial/8250/8250_lpss.c
index 60eff3240c8a..4dee8a9e0c95 100644
--- a/drivers/tty/serial/8250/8250_lpss.c
+++ b/drivers/tty/serial/8250/8250_lpss.c
@@ -156,6 +156,11 @@ static int byt_serial_setup(struct lpss8250 *lpss, struct uart_port *port)
return 0;
}
+static int ehl_serial_setup(struct lpss8250 *lpss, struct uart_port *port)
+{
+ return 0;
+}
+
#ifdef CONFIG_SERIAL_8250_DMA
static const struct dw_dma_platform_data qrk_serial_dma_pdata = {
.nr_channels = 2,
@@ -356,6 +361,7 @@ static const struct lpss8250_board byt_board = {
static const struct lpss8250_board ehl_board = {
.freq = 200000000,
.base_baud = 12500000,
+ .setup = ehl_serial_setup,
};
static const struct lpss8250_board qrk_board = {
diff --git a/drivers/tty/serial/8250/8250_mtk.c b/drivers/tty/serial/8250/8250_mtk.c
index 4d067f515f74..f839380c2f4c 100644
--- a/drivers/tty/serial/8250/8250_mtk.c
+++ b/drivers/tty/serial/8250/8250_mtk.c
@@ -32,6 +32,7 @@
#define MTK_UART_RXTRI_AD 0x14 /* RX Trigger address */
#define MTK_UART_FRACDIV_L 0x15 /* Fractional divider LSB address */
#define MTK_UART_FRACDIV_M 0x16 /* Fractional divider MSB address */
+#define MTK_UART_DEBUG0 0x18
#define MTK_UART_IER_XOFFI 0x20 /* Enable XOFF character interrupt */
#define MTK_UART_IER_RTSI 0x40 /* Enable RTS Modem status interrupt */
#define MTK_UART_IER_CTSI 0x80 /* Enable CTS Modem status interrupt */
@@ -388,9 +389,18 @@ mtk8250_set_termios(struct uart_port *port, struct ktermios *termios,
static int __maybe_unused mtk8250_runtime_suspend(struct device *dev)
{
struct mtk8250_data *data = dev_get_drvdata(dev);
+ struct uart_8250_port *up = serial8250_get_port(data->line);
- clk_disable_unprepare(data->uart_clk);
- clk_disable_unprepare(data->bus_clk);
+ /* wait until UART in idle status */
+ while
+ (serial_in(up, MTK_UART_DEBUG0));
+
+ if (data->clk_count == 0U) {
+ dev_dbg(dev, "%s clock count is 0\n", __func__);
+ } else {
+ clk_disable_unprepare(data->bus_clk);
+ data->clk_count--;
+ }
return 0;
}
@@ -400,16 +410,16 @@ static int __maybe_unused mtk8250_runtime_resume(struct device *dev)
struct mtk8250_data *data = dev_get_drvdata(dev);
int err;
- err = clk_prepare_enable(data->uart_clk);
- if (err) {
- dev_warn(dev, "Can't enable clock\n");
- return err;
- }
-
- err = clk_prepare_enable(data->bus_clk);
- if (err) {
- dev_warn(dev, "Can't enable bus clock\n");
- return err;
+ if (data->clk_count > 0U) {
+ dev_dbg(dev, "%s clock count is %d\n", __func__,
+ data->clk_count);
+ } else {
+ err = clk_prepare_enable(data->bus_clk);
+ if (err) {
+ dev_warn(dev, "Can't enable bus clock\n");
+ return err;
+ }
+ data->clk_count++;
}
return 0;
@@ -419,12 +429,14 @@ static void
mtk8250_do_pm(struct uart_port *port, unsigned int state, unsigned int old)
{
if (!state)
- pm_runtime_get_sync(port->dev);
+ if (!mtk8250_runtime_resume(port->dev))
+ pm_runtime_get_sync(port->dev);
serial8250_do_pm(port, state, old);
if (state)
- pm_runtime_put_sync_suspend(port->dev);
+ if (!pm_runtime_put_sync_suspend(port->dev))
+ mtk8250_runtime_suspend(port->dev);
}
#ifdef CONFIG_SERIAL_8250_DMA
@@ -501,6 +513,8 @@ static int mtk8250_probe(struct platform_device *pdev)
if (!data)
return -ENOMEM;
+ data->clk_count = 0;
+
if (pdev->dev.of_node) {
err = mtk8250_probe_of(pdev, &uart.port, data);
if (err)
@@ -533,6 +547,7 @@ static int mtk8250_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, data);
+ pm_runtime_enable(&pdev->dev);
err = mtk8250_runtime_resume(&pdev->dev);
if (err)
return err;
@@ -541,9 +556,6 @@ static int mtk8250_probe(struct platform_device *pdev)
if (data->line < 0)
return data->line;
- pm_runtime_set_active(&pdev->dev);
- pm_runtime_enable(&pdev->dev);
-
data->rx_wakeup_irq = platform_get_irq_optional(pdev, 1);
return 0;
@@ -556,11 +568,13 @@ static int mtk8250_remove(struct platform_device *pdev)
pm_runtime_get_sync(&pdev->dev);
serial8250_unregister_port(data->line);
- mtk8250_runtime_suspend(&pdev->dev);
pm_runtime_disable(&pdev->dev);
pm_runtime_put_noidle(&pdev->dev);
+ if (!pm_runtime_status_suspended(&pdev->dev))
+ mtk8250_runtime_suspend(&pdev->dev);
+
return 0;
}
diff --git a/drivers/tty/serial/8250/8250_of.c b/drivers/tty/serial/8250/8250_of.c
index f6687756ec5e..65e9045dafe6 100644
--- a/drivers/tty/serial/8250/8250_of.c
+++ b/drivers/tty/serial/8250/8250_of.c
@@ -7,7 +7,6 @@
#include <linux/console.h>
#include <linux/module.h>
#include <linux/slab.h>
-#include <linux/delay.h>
#include <linux/serial_core.h>
#include <linux/serial_reg.h>
#include <linux/of_address.h>
@@ -26,67 +25,16 @@ struct of_serial_info {
int line;
};
-#ifdef CONFIG_ARCH_TEGRA
-static void tegra_serial_handle_break(struct uart_port *p)
-{
- unsigned int status, tmout = 10000;
-
- do {
- status = p->serial_in(p, UART_LSR);
- if (status & (UART_LSR_FIFOE | UART_LSR_BRK_ERROR_BITS))
- status = p->serial_in(p, UART_RX);
- else
- break;
- if (--tmout == 0)
- break;
- udelay(1);
- } while (1);
-}
-#else
-static inline void tegra_serial_handle_break(struct uart_port *port)
-{
-}
-#endif
-
-static int of_8250_rs485_config(struct uart_port *port,
- struct serial_rs485 *rs485)
-{
- struct uart_8250_port *up = up_to_u8250p(port);
-
- /* Clamp the delays to [0, 100ms] */
- rs485->delay_rts_before_send = min(rs485->delay_rts_before_send, 100U);
- rs485->delay_rts_after_send = min(rs485->delay_rts_after_send, 100U);
-
- port->rs485 = *rs485;
-
- /*
- * Both serial8250_em485_init and serial8250_em485_destroy
- * are idempotent
- */
- if (rs485->flags & SER_RS485_ENABLED) {
- int ret = serial8250_em485_init(up);
-
- if (ret) {
- rs485->flags &= ~SER_RS485_ENABLED;
- port->rs485.flags &= ~SER_RS485_ENABLED;
- }
- return ret;
- }
-
- serial8250_em485_destroy(up);
-
- return 0;
-}
-
/*
* Fill a struct uart_port for a given device node
*/
static int of_platform_serial_setup(struct platform_device *ofdev,
- int type, struct uart_port *port,
+ int type, struct uart_8250_port *up,
struct of_serial_info *info)
{
struct resource resource;
struct device_node *np = ofdev->dev.of_node;
+ struct uart_port *port = &up->port;
u32 clk, spd, prop;
int ret, irq;
@@ -207,13 +155,11 @@ static int of_platform_serial_setup(struct platform_device *ofdev,
port->flags |= UPF_SKIP_TEST;
port->dev = &ofdev->dev;
- port->rs485_config = of_8250_rs485_config;
+ port->rs485_config = serial8250_em485_config;
+ up->rs485_start_tx = serial8250_em485_start_tx;
+ up->rs485_stop_tx = serial8250_em485_stop_tx;
switch (type) {
- case PORT_TEGRA:
- port->handle_break = tegra_serial_handle_break;
- break;
-
case PORT_RT2880:
port->iotype = UPIO_AU;
break;
@@ -258,7 +204,7 @@ static int of_platform_serial_probe(struct platform_device *ofdev)
return -ENOMEM;
memset(&port8250, 0, sizeof(port8250));
- ret = of_platform_serial_setup(ofdev, port_type, &port8250.port, info);
+ ret = of_platform_serial_setup(ofdev, port_type, &port8250, info);
if (ret)
goto err_free;
@@ -358,7 +304,6 @@ static const struct of_device_id of_platform_serial_table[] = {
{ .compatible = "ns16550", .data = (void *)PORT_16550, },
{ .compatible = "ns16750", .data = (void *)PORT_16750, },
{ .compatible = "ns16850", .data = (void *)PORT_16850, },
- { .compatible = "nvidia,tegra20-uart", .data = (void *)PORT_TEGRA, },
{ .compatible = "nxp,lpc3220-uart", .data = (void *)PORT_LPC3220, },
{ .compatible = "ralink,rt2880-uart", .data = (void *)PORT_RT2880, },
{ .compatible = "intel,xscale-uart", .data = (void *)PORT_XSCALE, },
diff --git a/drivers/tty/serial/8250/8250_omap.c b/drivers/tty/serial/8250/8250_omap.c
index 76fe72bfb8bb..16cfb887c5a3 100644
--- a/drivers/tty/serial/8250/8250_omap.c
+++ b/drivers/tty/serial/8250/8250_omap.c
@@ -40,6 +40,7 @@
* The same errata is applicable to AM335x and DRA7x processors too.
*/
#define UART_ERRATA_CLOCK_DISABLE (1 << 3)
+#define UART_HAS_EFR2 BIT(4)
#define OMAP_UART_FCR_RX_TRIG 6
#define OMAP_UART_FCR_TX_TRIG 4
@@ -93,6 +94,10 @@
#define OMAP_UART_REV_52 0x0502
#define OMAP_UART_REV_63 0x0603
+/* Enhanced features register 2 */
+#define UART_OMAP_EFR2 0x23
+#define UART_OMAP_EFR2_TIMEOUT_BEHAVE BIT(6)
+
struct omap8250_priv {
int line;
u8 habit;
@@ -105,6 +110,8 @@ struct omap8250_priv {
u8 delayed_restore;
u16 quot;
+ u8 tx_trigger;
+ u8 rx_trigger;
bool is_suspending;
int wakeirq;
int wakeups_enabled;
@@ -118,6 +125,17 @@ struct omap8250_priv {
bool throttled;
};
+struct omap8250_dma_params {
+ u32 rx_size;
+ u8 rx_trigger;
+ u8 tx_trigger;
+};
+
+struct omap8250_platdata {
+ struct omap8250_dma_params *dma_params;
+ u8 habit;
+};
+
#ifdef CONFIG_SERIAL_8250_DMA
static void omap_8250_rx_dma_flush(struct uart_8250_port *p);
#else
@@ -295,8 +313,8 @@ static void omap8250_restore_regs(struct uart_8250_port *up)
serial_out(up, UART_TI752_TCR, OMAP_UART_TCR_RESTORE(16) |
OMAP_UART_TCR_HALT(52));
serial_out(up, UART_TI752_TLR,
- TRIGGER_TLR_MASK(TX_TRIGGER) << UART_TI752_TLR_TX |
- TRIGGER_TLR_MASK(RX_TRIGGER) << UART_TI752_TLR_RX);
+ TRIGGER_TLR_MASK(priv->tx_trigger) << UART_TI752_TLR_TX |
+ TRIGGER_TLR_MASK(priv->rx_trigger) << UART_TI752_TLR_RX);
serial_out(up, UART_LCR, 0);
@@ -435,8 +453,8 @@ static void omap_8250_set_termios(struct uart_port *port,
* This is because threshold and trigger values are the same.
*/
up->fcr = UART_FCR_ENABLE_FIFO;
- up->fcr |= TRIGGER_FCR_MASK(TX_TRIGGER) << OMAP_UART_FCR_TX_TRIG;
- up->fcr |= TRIGGER_FCR_MASK(RX_TRIGGER) << OMAP_UART_FCR_RX_TRIG;
+ up->fcr |= TRIGGER_FCR_MASK(priv->tx_trigger) << OMAP_UART_FCR_TX_TRIG;
+ up->fcr |= TRIGGER_FCR_MASK(priv->rx_trigger) << OMAP_UART_FCR_RX_TRIG;
priv->scr = OMAP_UART_SCR_RX_TRIG_GRANU1_MASK | OMAP_UART_SCR_TX_EMPTY |
OMAP_UART_SCR_TX_TRIG_GRANU1_MASK;
@@ -651,7 +669,7 @@ static int omap_8250_startup(struct uart_port *port)
priv->wer |= OMAP_UART_TX_WAKEUP_EN;
serial_out(up, UART_OMAP_WER, priv->wer);
- if (up->dma)
+ if (up->dma && !(priv->habit & UART_HAS_EFR2))
up->dma->rx_dma(up);
pm_runtime_mark_last_busy(port->dev);
@@ -676,6 +694,8 @@ static void omap_8250_shutdown(struct uart_port *port)
pm_runtime_get_sync(port->dev);
serial_out(up, UART_OMAP_WER, 0);
+ if (priv->habit & UART_HAS_EFR2)
+ serial_out(up, UART_OMAP_EFR2, 0x0);
up->ier = 0;
serial_out(up, UART_IER, 0);
@@ -699,14 +719,12 @@ static void omap_8250_shutdown(struct uart_port *port)
static void omap_8250_throttle(struct uart_port *port)
{
struct omap8250_priv *priv = port->private_data;
- struct uart_8250_port *up = up_to_u8250p(port);
unsigned long flags;
pm_runtime_get_sync(port->dev);
spin_lock_irqsave(&port->lock, flags);
- up->ier &= ~(UART_IER_RLSI | UART_IER_RDI);
- serial_out(up, UART_IER, up->ier);
+ port->ops->stop_rx(port);
priv->throttled = true;
spin_unlock_irqrestore(&port->lock, flags);
@@ -714,36 +732,6 @@ static void omap_8250_throttle(struct uart_port *port)
pm_runtime_put_autosuspend(port->dev);
}
-static int omap_8250_rs485_config(struct uart_port *port,
- struct serial_rs485 *rs485)
-{
- struct uart_8250_port *up = up_to_u8250p(port);
-
- /* Clamp the delays to [0, 100ms] */
- rs485->delay_rts_before_send = min(rs485->delay_rts_before_send, 100U);
- rs485->delay_rts_after_send = min(rs485->delay_rts_after_send, 100U);
-
- port->rs485 = *rs485;
-
- /*
- * Both serial8250_em485_init and serial8250_em485_destroy
- * are idempotent
- */
- if (rs485->flags & SER_RS485_ENABLED) {
- int ret = serial8250_em485_init(up);
-
- if (ret) {
- rs485->flags &= ~SER_RS485_ENABLED;
- port->rs485.flags &= ~SER_RS485_ENABLED;
- }
- return ret;
- }
-
- serial8250_em485_destroy(up);
-
- return 0;
-}
-
static void omap_8250_unthrottle(struct uart_port *port)
{
struct omap8250_priv *priv = port->private_data;
@@ -757,6 +745,7 @@ static void omap_8250_unthrottle(struct uart_port *port)
if (up->dma)
up->dma->rx_dma(up);
up->ier |= UART_IER_RLSI | UART_IER_RDI;
+ port->read_status_mask |= UART_LSR_DR;
serial_out(up, UART_IER, up->ier);
spin_unlock_irqrestore(&port->lock, flags);
@@ -767,32 +756,50 @@ static void omap_8250_unthrottle(struct uart_port *port)
#ifdef CONFIG_SERIAL_8250_DMA
static int omap_8250_rx_dma(struct uart_8250_port *p);
+/* Must be called while priv->rx_dma_lock is held */
static void __dma_rx_do_complete(struct uart_8250_port *p)
{
- struct omap8250_priv *priv = p->port.private_data;
struct uart_8250_dma *dma = p->dma;
struct tty_port *tty_port = &p->port.state->port;
+ struct dma_chan *rxchan = dma->rxchan;
+ dma_cookie_t cookie;
struct dma_tx_state state;
int count;
- unsigned long flags;
int ret;
- spin_lock_irqsave(&priv->rx_dma_lock, flags);
-
if (!dma->rx_running)
- goto unlock;
+ goto out;
+ cookie = dma->rx_cookie;
dma->rx_running = 0;
- dmaengine_tx_status(dma->rxchan, dma->rx_cookie, &state);
+ dmaengine_tx_status(rxchan, cookie, &state);
+
+ count = dma->rx_size - state.residue + state.in_flight_bytes;
+ if (count < dma->rx_size) {
+ dmaengine_terminate_async(rxchan);
+
+ /*
+ * Poll for teardown to complete which guarantees in
+ * flight data is drained.
+ */
+ if (state.in_flight_bytes) {
+ int poll_count = 25;
- count = dma->rx_size - state.residue;
+ while (dmaengine_tx_status(rxchan, cookie, NULL) &&
+ poll_count--)
+ cpu_relax();
+ if (!poll_count)
+ dev_err(p->port.dev, "teardown incomplete\n");
+ }
+ }
+ if (!count)
+ goto out;
ret = tty_insert_flip_string(tty_port, dma->rx_buf, count);
p->port.icount.rx += ret;
p->port.icount.buf_overrun += count - ret;
-unlock:
- spin_unlock_irqrestore(&priv->rx_dma_lock, flags);
+out:
tty_flip_buffer_push(tty_port);
}
@@ -818,8 +825,12 @@ static void __dma_rx_complete(void *param)
return;
}
__dma_rx_do_complete(p);
- if (!priv->throttled)
- omap_8250_rx_dma(p);
+ if (!priv->throttled) {
+ p->ier |= UART_IER_RLSI | UART_IER_RDI;
+ serial_out(p, UART_IER, p->ier);
+ if (!(priv->habit & UART_HAS_EFR2))
+ omap_8250_rx_dma(p);
+ }
spin_unlock_irqrestore(&p->port.lock, flags);
}
@@ -845,10 +856,8 @@ static void omap_8250_rx_dma_flush(struct uart_8250_port *p)
if (WARN_ON_ONCE(ret))
priv->rx_dma_broken = true;
}
- spin_unlock_irqrestore(&priv->rx_dma_lock, flags);
-
__dma_rx_do_complete(p);
- dmaengine_terminate_all(dma->rxchan);
+ spin_unlock_irqrestore(&priv->rx_dma_lock, flags);
}
static int omap_8250_rx_dma(struct uart_8250_port *p)
@@ -864,8 +873,20 @@ static int omap_8250_rx_dma(struct uart_8250_port *p)
spin_lock_irqsave(&priv->rx_dma_lock, flags);
- if (dma->rx_running)
+ if (dma->rx_running) {
+ enum dma_status state;
+
+ state = dmaengine_tx_status(dma->rxchan, dma->rx_cookie, NULL);
+ if (state == DMA_COMPLETE) {
+ /*
+ * Disable RX interrupts to allow RX DMA completion
+ * callback to run.
+ */
+ p->ier &= ~(UART_IER_RLSI | UART_IER_RDI);
+ serial_out(p, UART_IER, p->ier);
+ }
goto out;
+ }
desc = dmaengine_prep_slave_single(dma->rxchan, dma->rx_addr,
dma->rx_size, DMA_DEV_TO_MEM,
@@ -1036,6 +1057,46 @@ static bool handle_rx_dma(struct uart_8250_port *up, unsigned int iir)
return omap_8250_rx_dma(up);
}
+static unsigned char omap_8250_handle_rx_dma(struct uart_8250_port *up,
+ u8 iir, unsigned char status)
+{
+ if ((status & (UART_LSR_DR | UART_LSR_BI)) &&
+ (iir & UART_IIR_RDI)) {
+ if (handle_rx_dma(up, iir)) {
+ status = serial8250_rx_chars(up, status);
+ omap_8250_rx_dma(up);
+ }
+ }
+
+ return status;
+}
+
+static void am654_8250_handle_rx_dma(struct uart_8250_port *up, u8 iir,
+ unsigned char status)
+{
+ /*
+ * Queue a new transfer if FIFO has data.
+ */
+ if ((status & (UART_LSR_DR | UART_LSR_BI)) &&
+ (up->ier & UART_IER_RDI)) {
+ omap_8250_rx_dma(up);
+ serial_out(up, UART_OMAP_EFR2, UART_OMAP_EFR2_TIMEOUT_BEHAVE);
+ } else if ((iir & 0x3f) == UART_IIR_RX_TIMEOUT) {
+ /*
+ * Disable RX timeout, read IIR to clear
+ * current timeout condition, clear EFR2 to
+ * periodic timeouts, re-enable interrupts.
+ */
+ up->ier &= ~(UART_IER_RLSI | UART_IER_RDI);
+ serial_out(up, UART_IER, up->ier);
+ omap_8250_rx_dma_flush(up);
+ serial_in(up, UART_IIR);
+ serial_out(up, UART_OMAP_EFR2, 0x0);
+ up->ier |= UART_IER_RLSI | UART_IER_RDI;
+ serial_out(up, UART_IER, up->ier);
+ }
+}
+
/*
* This is mostly serial8250_handle_irq(). We have a slightly different DMA
* hoook for RX/TX and need different logic for them in the ISR. Therefore we
@@ -1044,6 +1105,7 @@ static bool handle_rx_dma(struct uart_8250_port *up, unsigned int iir)
static int omap_8250_dma_handle_irq(struct uart_port *port)
{
struct uart_8250_port *up = up_to_u8250p(port);
+ struct omap8250_priv *priv = up->port.private_data;
unsigned char status;
unsigned long flags;
u8 iir;
@@ -1053,19 +1115,18 @@ static int omap_8250_dma_handle_irq(struct uart_port *port)
iir = serial_port_in(port, UART_IIR);
if (iir & UART_IIR_NO_INT) {
serial8250_rpm_put(up);
- return 0;
+ return IRQ_HANDLED;
}
spin_lock_irqsave(&port->lock, flags);
status = serial_port_in(port, UART_LSR);
- if (status & (UART_LSR_DR | UART_LSR_BI)) {
- if (handle_rx_dma(up, iir)) {
- status = serial8250_rx_chars(up, status);
- omap_8250_rx_dma(up);
- }
- }
+ if (priv->habit & UART_HAS_EFR2)
+ am654_8250_handle_rx_dma(up, iir, status);
+ else
+ status = omap_8250_handle_rx_dma(up, iir, status);
+
serial8250_modem_status(up);
if (status & UART_LSR_THRE && up->dma->tx_err) {
if (uart_tx_stopped(&up->port) ||
@@ -1107,18 +1168,41 @@ static int omap8250_no_handle_irq(struct uart_port *port)
return 0;
}
-static const u8 omap4_habit = UART_ERRATA_CLOCK_DISABLE;
-static const u8 am3352_habit = OMAP_DMA_TX_KICK | UART_ERRATA_CLOCK_DISABLE;
-static const u8 dra742_habit = UART_ERRATA_CLOCK_DISABLE;
+static struct omap8250_dma_params am654_dma = {
+ .rx_size = SZ_2K,
+ .rx_trigger = 1,
+ .tx_trigger = TX_TRIGGER,
+};
+
+static struct omap8250_dma_params am33xx_dma = {
+ .rx_size = RX_TRIGGER,
+ .rx_trigger = RX_TRIGGER,
+ .tx_trigger = TX_TRIGGER,
+};
+
+static struct omap8250_platdata am654_platdata = {
+ .dma_params = &am654_dma,
+ .habit = UART_HAS_EFR2,
+};
+
+static struct omap8250_platdata am33xx_platdata = {
+ .dma_params = &am33xx_dma,
+ .habit = OMAP_DMA_TX_KICK | UART_ERRATA_CLOCK_DISABLE,
+};
+
+static struct omap8250_platdata omap4_platdata = {
+ .dma_params = &am33xx_dma,
+ .habit = UART_ERRATA_CLOCK_DISABLE,
+};
static const struct of_device_id omap8250_dt_ids[] = {
- { .compatible = "ti,am654-uart" },
+ { .compatible = "ti,am654-uart", .data = &am654_platdata, },
{ .compatible = "ti,omap2-uart" },
{ .compatible = "ti,omap3-uart" },
- { .compatible = "ti,omap4-uart", .data = &omap4_habit, },
- { .compatible = "ti,am3352-uart", .data = &am3352_habit, },
- { .compatible = "ti,am4372-uart", .data = &am3352_habit, },
- { .compatible = "ti,dra742-uart", .data = &dra742_habit, },
+ { .compatible = "ti,omap4-uart", .data = &omap4_platdata, },
+ { .compatible = "ti,am3352-uart", .data = &am33xx_platdata, },
+ { .compatible = "ti,am4372-uart", .data = &am33xx_platdata, },
+ { .compatible = "ti,dra742-uart", .data = &omap4_platdata, },
{},
};
MODULE_DEVICE_TABLE(of, omap8250_dt_ids);
@@ -1129,10 +1213,10 @@ static int omap8250_probe(struct platform_device *pdev)
struct resource *irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
struct device_node *np = pdev->dev.of_node;
struct omap8250_priv *priv;
+ const struct omap8250_platdata *pdata;
struct uart_8250_port up;
int ret;
void __iomem *membase;
- const struct of_device_id *id;
if (!regs || !irq) {
dev_err(&pdev->dev, "missing registers or irq\n");
@@ -1187,7 +1271,9 @@ static int omap8250_probe(struct platform_device *pdev)
up.port.shutdown = omap_8250_shutdown;
up.port.throttle = omap_8250_throttle;
up.port.unthrottle = omap_8250_unthrottle;
- up.port.rs485_config = omap_8250_rs485_config;
+ up.port.rs485_config = serial8250_em485_config;
+ up.rs485_start_tx = serial8250_em485_start_tx;
+ up.rs485_stop_tx = serial8250_em485_stop_tx;
up.port.has_sysrq = IS_ENABLED(CONFIG_SERIAL_8250_CONSOLE);
ret = of_alias_get_id(np, "serial");
@@ -1211,9 +1297,9 @@ static int omap8250_probe(struct platform_device *pdev)
priv->wakeirq = irq_of_parse_and_map(np, 1);
- id = of_match_device(of_match_ptr(omap8250_dt_ids), &pdev->dev);
- if (id && id->data)
- priv->habit |= *(u8 *)id->data;
+ pdata = of_device_get_match_data(&pdev->dev);
+ if (pdata)
+ priv->habit |= pdata->habit;
if (!up.port.uartclk) {
up.port.uartclk = DEFAULT_CLK_SPEED;
@@ -1230,6 +1316,7 @@ static int omap8250_probe(struct platform_device *pdev)
spin_lock_init(&priv->rx_dma_lock);
device_init_wakeup(&pdev->dev, true);
+ pm_runtime_enable(&pdev->dev);
pm_runtime_use_autosuspend(&pdev->dev);
/*
@@ -1243,12 +1330,13 @@ static int omap8250_probe(struct platform_device *pdev)
pm_runtime_set_autosuspend_delay(&pdev->dev, -1);
pm_runtime_irq_safe(&pdev->dev);
- pm_runtime_enable(&pdev->dev);
pm_runtime_get_sync(&pdev->dev);
omap_serial_fill_features_erratas(&up, priv);
up.port.handle_irq = omap8250_no_handle_irq;
+ priv->rx_trigger = RX_TRIGGER;
+ priv->tx_trigger = TX_TRIGGER;
#ifdef CONFIG_SERIAL_8250_DMA
/*
* Oh DMA support. If there are no DMA properties in the DT then
@@ -1260,13 +1348,26 @@ static int omap8250_probe(struct platform_device *pdev)
*/
ret = of_property_count_strings(np, "dma-names");
if (ret == 2) {
+ struct omap8250_dma_params *dma_params = NULL;
+
up.dma = &priv->omap8250_dma;
- priv->omap8250_dma.fn = the_no_dma_filter_fn;
- priv->omap8250_dma.tx_dma = omap_8250_tx_dma;
- priv->omap8250_dma.rx_dma = omap_8250_rx_dma;
- priv->omap8250_dma.rx_size = RX_TRIGGER;
- priv->omap8250_dma.rxconf.src_maxburst = RX_TRIGGER;
- priv->omap8250_dma.txconf.dst_maxburst = TX_TRIGGER;
+ up.dma->fn = the_no_dma_filter_fn;
+ up.dma->tx_dma = omap_8250_tx_dma;
+ up.dma->rx_dma = omap_8250_rx_dma;
+ if (pdata)
+ dma_params = pdata->dma_params;
+
+ if (dma_params) {
+ up.dma->rx_size = dma_params->rx_size;
+ up.dma->rxconf.src_maxburst = dma_params->rx_trigger;
+ up.dma->txconf.dst_maxburst = dma_params->tx_trigger;
+ priv->rx_trigger = dma_params->rx_trigger;
+ priv->tx_trigger = dma_params->tx_trigger;
+ } else {
+ up.dma->rx_size = RX_TRIGGER;
+ up.dma->rxconf.src_maxburst = RX_TRIGGER;
+ up.dma->txconf.dst_maxburst = TX_TRIGGER;
+ }
}
#endif
ret = serial8250_register_8250_port(&up);
@@ -1464,7 +1565,7 @@ static int omap8250_runtime_resume(struct device *dev)
if (omap8250_lost_context(up))
omap8250_restore_regs(up);
- if (up->dma && up->dma->rxchan)
+ if (up->dma && up->dma->rxchan && !(priv->habit & UART_HAS_EFR2))
omap_8250_rx_dma(up);
priv->latency = priv->calc_latency;
diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c
index 939685fed396..0804469ff052 100644
--- a/drivers/tty/serial/8250/8250_pci.c
+++ b/drivers/tty/serial/8250/8250_pci.c
@@ -53,7 +53,7 @@ struct serial_private {
unsigned int nr;
struct pci_serial_quirk *quirk;
const struct pciserial_board *board;
- int line[0];
+ int line[];
};
static const struct pci_device_id pci_use_msi[] = {
diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index 0325f2e53b74..f77bf820b7a3 100644
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -557,17 +557,6 @@ static void serial8250_clear_fifos(struct uart_8250_port *p)
}
}
-static inline void serial8250_em485_rts_after_send(struct uart_8250_port *p)
-{
- unsigned char mcr = serial8250_in_MCR(p);
-
- if (p->port.rs485.flags & SER_RS485_RTS_AFTER_SEND)
- mcr |= UART_MCR_RTS;
- else
- mcr &= ~UART_MCR_RTS;
- serial8250_out_MCR(p, mcr);
-}
-
static enum hrtimer_restart serial8250_em485_handle_start_tx(struct hrtimer *t);
static enum hrtimer_restart serial8250_em485_handle_stop_tx(struct hrtimer *t);
@@ -615,7 +604,7 @@ EXPORT_SYMBOL_GPL(serial8250_rpm_put);
*
* Return 0 - success, -errno - otherwise
*/
-int serial8250_em485_init(struct uart_8250_port *p)
+static int serial8250_em485_init(struct uart_8250_port *p)
{
if (p->em485)
return 0;
@@ -632,11 +621,12 @@ int serial8250_em485_init(struct uart_8250_port *p)
p->em485->start_tx_timer.function = &serial8250_em485_handle_start_tx;
p->em485->port = p;
p->em485->active_timer = NULL;
- serial8250_em485_rts_after_send(p);
+ p->em485->tx_stopped = true;
+
+ p->rs485_stop_tx(p);
return 0;
}
-EXPORT_SYMBOL_GPL(serial8250_em485_init);
/**
* serial8250_em485_destroy() - put uart_8250_port into normal state
@@ -664,6 +654,52 @@ void serial8250_em485_destroy(struct uart_8250_port *p)
}
EXPORT_SYMBOL_GPL(serial8250_em485_destroy);
+/**
+ * serial8250_em485_config() - generic ->rs485_config() callback
+ * @port: uart port
+ * @rs485: rs485 settings
+ *
+ * Generic callback usable by 8250 uart drivers to activate rs485 settings
+ * if the uart is incapable of driving RTS as a Transmit Enable signal in
+ * hardware, relying on software emulation instead.
+ */
+int serial8250_em485_config(struct uart_port *port, struct serial_rs485 *rs485)
+{
+ struct uart_8250_port *up = up_to_u8250p(port);
+
+ /* pick sane settings if the user hasn't */
+ if (!!(rs485->flags & SER_RS485_RTS_ON_SEND) ==
+ !!(rs485->flags & SER_RS485_RTS_AFTER_SEND)) {
+ rs485->flags |= SER_RS485_RTS_ON_SEND;
+ rs485->flags &= ~SER_RS485_RTS_AFTER_SEND;
+ }
+
+ /* clamp the delays to [0, 100ms] */
+ rs485->delay_rts_before_send = min(rs485->delay_rts_before_send, 100U);
+ rs485->delay_rts_after_send = min(rs485->delay_rts_after_send, 100U);
+
+ memset(rs485->padding, 0, sizeof(rs485->padding));
+ port->rs485 = *rs485;
+
+ /*
+ * Both serial8250_em485_init() and serial8250_em485_destroy()
+ * are idempotent.
+ */
+ if (rs485->flags & SER_RS485_ENABLED) {
+ int ret = serial8250_em485_init(up);
+
+ if (ret) {
+ rs485->flags &= ~SER_RS485_ENABLED;
+ port->rs485.flags &= ~SER_RS485_ENABLED;
+ }
+ return ret;
+ }
+
+ serial8250_em485_destroy(up);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(serial8250_em485_config);
+
/*
* These two wrappers ensure that enable_runtime_pm_tx() can be called more than
* once and disable_runtime_pm_tx() will still disable RPM because the fifo is
@@ -1318,8 +1354,8 @@ out_lock:
fintek_8250_probe(up);
if (up->capabilities != old_capabilities) {
- pr_warn("%s: detected caps %08x should be %08x\n",
- port->name, old_capabilities, up->capabilities);
+ dev_warn(port->dev, "detected caps %08x should be %08x\n",
+ old_capabilities, up->capabilities);
}
out:
DEBUG_AUTOCONF("iir=%d ", scratch);
@@ -1394,9 +1430,21 @@ static void serial8250_stop_rx(struct uart_port *port)
serial8250_rpm_put(up);
}
-static void __do_stop_tx_rs485(struct uart_8250_port *p)
+/**
+ * serial8250_em485_stop_tx() - generic ->rs485_stop_tx() callback
+ * @up: uart 8250 port
+ *
+ * Generic callback usable by 8250 uart drivers to stop rs485 transmission.
+ */
+void serial8250_em485_stop_tx(struct uart_8250_port *p)
{
- serial8250_em485_rts_after_send(p);
+ unsigned char mcr = serial8250_in_MCR(p);
+
+ if (p->port.rs485.flags & SER_RS485_RTS_AFTER_SEND)
+ mcr |= UART_MCR_RTS;
+ else
+ mcr &= ~UART_MCR_RTS;
+ serial8250_out_MCR(p, mcr);
/*
* Empty the RX FIFO, we are not interested in anything
@@ -1410,6 +1458,8 @@ static void __do_stop_tx_rs485(struct uart_8250_port *p)
serial_port_out(&p->port, UART_IER, p->ier);
}
}
+EXPORT_SYMBOL_GPL(serial8250_em485_stop_tx);
+
static enum hrtimer_restart serial8250_em485_handle_stop_tx(struct hrtimer *t)
{
struct uart_8250_em485 *em485;
@@ -1422,8 +1472,9 @@ static enum hrtimer_restart serial8250_em485_handle_stop_tx(struct hrtimer *t)
serial8250_rpm_get(p);
spin_lock_irqsave(&p->port.lock, flags);
if (em485->active_timer == &em485->stop_tx_timer) {
- __do_stop_tx_rs485(p);
+ p->rs485_stop_tx(p);
em485->active_timer = NULL;
+ em485->tx_stopped = true;
}
spin_unlock_irqrestore(&p->port.lock, flags);
serial8250_rpm_put(p);
@@ -1444,7 +1495,7 @@ static void __stop_tx_rs485(struct uart_8250_port *p)
struct uart_8250_em485 *em485 = p->em485;
/*
- * __do_stop_tx_rs485 is going to set RTS according to config
+ * rs485_stop_tx() is going to set RTS according to config
* AND flush RX FIFO if required.
*/
if (p->port.rs485.delay_rts_after_send > 0) {
@@ -1452,7 +1503,9 @@ static void __stop_tx_rs485(struct uart_8250_port *p)
start_hrtimer_ms(&em485->stop_tx_timer,
p->port.rs485.delay_rts_after_send);
} else {
- __do_stop_tx_rs485(p);
+ p->rs485_stop_tx(p);
+ em485->active_timer = NULL;
+ em485->tx_stopped = true;
}
}
@@ -1477,8 +1530,6 @@ static inline void __stop_tx(struct uart_8250_port *p)
if ((lsr & BOTH_EMPTY) != BOTH_EMPTY)
return;
- em485->active_timer = NULL;
-
__stop_tx_rs485(p);
}
__do_stop_tx(p);
@@ -1528,25 +1579,42 @@ static inline void __start_tx(struct uart_port *port)
}
}
-static inline void start_tx_rs485(struct uart_port *port)
+/**
+ * serial8250_em485_start_tx() - generic ->rs485_start_tx() callback
+ * @up: uart 8250 port
+ *
+ * Generic callback usable by 8250 uart drivers to start rs485 transmission.
+ * Assumes that setting the RTS bit in the MCR register means RTS is high.
+ * (Some chips use inverse semantics.) Further assumes that reception is
+ * stoppable by disabling the UART_IER_RDI interrupt. (Some chips set the
+ * UART_LSR_DR bit even when UART_IER_RDI is disabled, foiling this approach.)
+ */
+void serial8250_em485_start_tx(struct uart_8250_port *up)
{
- struct uart_8250_port *up = up_to_u8250p(port);
- struct uart_8250_em485 *em485 = up->em485;
- unsigned char mcr;
+ unsigned char mcr = serial8250_in_MCR(up);
if (!(up->port.rs485.flags & SER_RS485_RX_DURING_TX))
serial8250_stop_rx(&up->port);
+ if (up->port.rs485.flags & SER_RS485_RTS_ON_SEND)
+ mcr |= UART_MCR_RTS;
+ else
+ mcr &= ~UART_MCR_RTS;
+ serial8250_out_MCR(up, mcr);
+}
+EXPORT_SYMBOL_GPL(serial8250_em485_start_tx);
+
+static inline void start_tx_rs485(struct uart_port *port)
+{
+ struct uart_8250_port *up = up_to_u8250p(port);
+ struct uart_8250_em485 *em485 = up->em485;
+
em485->active_timer = NULL;
- mcr = serial8250_in_MCR(up);
- if (!!(up->port.rs485.flags & SER_RS485_RTS_ON_SEND) !=
- !!(mcr & UART_MCR_RTS)) {
- if (up->port.rs485.flags & SER_RS485_RTS_ON_SEND)
- mcr |= UART_MCR_RTS;
- else
- mcr &= ~UART_MCR_RTS;
- serial8250_out_MCR(up, mcr);
+ if (em485->tx_stopped) {
+ em485->tx_stopped = false;
+
+ up->rs485_start_tx(up);
if (up->port.rs485.delay_rts_before_send > 0) {
em485->active_timer = &em485->start_tx_timer;
@@ -1683,7 +1751,7 @@ void serial8250_read_char(struct uart_8250_port *up, unsigned char lsr)
lsr &= port->read_status_mask;
if (lsr & UART_LSR_BI) {
- pr_debug("%s: handling break\n", __func__);
+ dev_dbg(port->dev, "handling break\n");
flag = TTY_BREAK;
} else if (lsr & UART_LSR_PE)
flag = TTY_PARITY;
@@ -1815,6 +1883,7 @@ int serial8250_handle_irq(struct uart_port *port, unsigned int iir)
unsigned char status;
unsigned long flags;
struct uart_8250_port *up = up_to_u8250p(port);
+ bool skip_rx = false;
if (iir & UART_IIR_NO_INT)
return 0;
@@ -1823,7 +1892,20 @@ int serial8250_handle_irq(struct uart_port *port, unsigned int iir)
status = serial_port_in(port, UART_LSR);
- if (status & (UART_LSR_DR | UART_LSR_BI)) {
+ /*
+ * If port is stopped and there are no error conditions in the
+ * FIFO, then don't drain the FIFO, as this may lead to TTY buffer
+ * overflow. Not servicing, RX FIFO would trigger auto HW flow
+ * control when FIFO occupancy reaches preset threshold, thus
+ * halting RX. This only works when auto HW flow control is
+ * available.
+ */
+ if (!(status & (UART_LSR_FIFOE | UART_LSR_BRK_ERROR_BITS)) &&
+ (port->status & (UPSTAT_AUTOCTS | UPSTAT_AUTORTS)) &&
+ !(port->read_status_mask & UART_LSR_DR))
+ skip_rx = true;
+
+ if (status & (UART_LSR_DR | UART_LSR_BI) && !skip_rx) {
if (!up->dma || handle_rx_dma(up, iir))
status = serial8250_rx_chars(up, status);
}
@@ -1924,6 +2006,13 @@ void serial8250_do_set_mctrl(struct uart_port *port, unsigned int mctrl)
struct uart_8250_port *up = up_to_u8250p(port);
unsigned char mcr;
+ if (port->rs485.flags & SER_RS485_ENABLED) {
+ if (serial8250_in_MCR(up) & UART_MCR_RTS)
+ mctrl |= TIOCM_RTS;
+ else
+ mctrl &= ~TIOCM_RTS;
+ }
+
mcr = serial8250_TIOCM_to_MCR(mctrl);
mcr = (mcr & up->mcr_mask) | up->mcr_force | up->mcr;
@@ -2134,7 +2223,7 @@ int serial8250_do_startup(struct uart_port *port)
*/
if (!(port->flags & UPF_BUGGY_UART) &&
(serial_port_in(port, UART_LSR) == 0xff)) {
- pr_info_ratelimited("%s: LSR safety check engaged!\n", port->name);
+ dev_info_ratelimited(port->dev, "LSR safety check engaged!\n");
retval = -ENODEV;
goto out;
}
@@ -2166,8 +2255,7 @@ int serial8250_do_startup(struct uart_port *port)
(port->type == PORT_ALTR_16550_F128)) && (port->fifosize > 1)) {
/* Bounds checking of TX threshold (valid 0 to fifosize-2) */
if ((up->tx_loadsz < 2) || (up->tx_loadsz > port->fifosize)) {
- pr_err("%s TX FIFO Threshold errors, skipping\n",
- port->name);
+ dev_err(port->dev, "TX FIFO Threshold errors, skipping\n");
} else {
serial_port_out(port, UART_ALTR_AFR,
UART_ALTR_EN_TXFIFO_LW);
@@ -2268,8 +2356,7 @@ int serial8250_do_startup(struct uart_port *port)
if (lsr & UART_LSR_TEMT && iir & UART_IIR_NO_INT) {
if (!(up->bugs & UART_BUG_TXEN)) {
up->bugs |= UART_BUG_TXEN;
- pr_debug("%s - enabling bad tx status workarounds\n",
- port->name);
+ dev_dbg(port->dev, "enabling bad tx status workarounds\n");
}
} else {
up->bugs &= ~UART_BUG_TXEN;
@@ -2294,10 +2381,14 @@ dont_test_tx_en:
* Request DMA channels for both RX and TX.
*/
if (up->dma) {
- retval = serial8250_request_dma(up);
- if (retval) {
- pr_warn_ratelimited("%s - failed to request DMA\n",
- port->name);
+ const char *msg = NULL;
+
+ if (uart_console(port))
+ msg = "forbid DMA for kernel console";
+ else if (serial8250_request_dma(up))
+ msg = "failed to request DMA";
+ if (msg) {
+ dev_warn_ratelimited(port->dev, "%s\n", msg);
up->dma = NULL;
}
}
@@ -2880,7 +2971,7 @@ static int do_serial8250_get_rxtrig(struct tty_port *port)
return rxtrig_bytes;
}
-static ssize_t serial8250_get_attr_rx_trig_bytes(struct device *dev,
+static ssize_t rx_trig_bytes_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct tty_port *port = dev_get_drvdata(dev);
@@ -2926,7 +3017,7 @@ static int do_serial8250_set_rxtrig(struct tty_port *port, unsigned char bytes)
return ret;
}
-static ssize_t serial8250_set_attr_rx_trig_bytes(struct device *dev,
+static ssize_t rx_trig_bytes_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct tty_port *port = dev_get_drvdata(dev);
@@ -2947,18 +3038,16 @@ static ssize_t serial8250_set_attr_rx_trig_bytes(struct device *dev,
return count;
}
-static DEVICE_ATTR(rx_trig_bytes, S_IRUSR | S_IWUSR | S_IRGRP,
- serial8250_get_attr_rx_trig_bytes,
- serial8250_set_attr_rx_trig_bytes);
+static DEVICE_ATTR_RW(rx_trig_bytes);
static struct attribute *serial8250_dev_attrs[] = {
&dev_attr_rx_trig_bytes.attr,
- NULL,
- };
+ NULL
+};
static struct attribute_group serial8250_dev_attr_group = {
.attrs = serial8250_dev_attrs,
- };
+};
static void register_dev_spec_attr_grp(struct uart_8250_port *up)
{
@@ -2987,6 +3076,9 @@ static void serial8250_config_port(struct uart_port *port, int flags)
if (flags & UART_CONFIG_TYPE)
autoconfig(up);
+ if (port->rs485.flags & SER_RS485_ENABLED)
+ port->rs485_config(port, &port->rs485);
+
/* if access method is AU, it is a 16550 with a quirk */
if (port->type == PORT_16550A && port->iotype == UPIO_AU)
up->bugs |= UART_BUG_NOMSR;
@@ -3127,10 +3219,14 @@ static void serial8250_console_restore(struct uart_8250_port *up)
* any possible real use of the port...
*
* The console_lock must be held when we get here.
+ *
+ * Doing runtime PM is really a bad idea for the kernel console.
+ * Thus, we assume the function is called when device is powered up.
*/
void serial8250_console_write(struct uart_8250_port *up, const char *s,
unsigned int count)
{
+ struct uart_8250_em485 *em485 = up->em485;
struct uart_port *port = &up->port;
unsigned long flags;
unsigned int ier;
@@ -3138,8 +3234,6 @@ void serial8250_console_write(struct uart_8250_port *up, const char *s,
touch_nmi_watchdog();
- serial8250_rpm_get(up);
-
if (oops_in_progress)
locked = spin_trylock_irqsave(&port->lock, flags);
else
@@ -3161,6 +3255,12 @@ void serial8250_console_write(struct uart_8250_port *up, const char *s,
up->canary = 0;
}
+ if (em485) {
+ if (em485->tx_stopped)
+ up->rs485_start_tx(up);
+ mdelay(port->rs485.delay_rts_before_send);
+ }
+
uart_console_write(port, s, count, serial8250_console_putchar);
/*
@@ -3168,6 +3268,13 @@ void serial8250_console_write(struct uart_8250_port *up, const char *s,
* and restore the IER
*/
wait_for_xmitr(up, BOTH_EMPTY);
+
+ if (em485) {
+ mdelay(port->rs485.delay_rts_after_send);
+ if (em485->tx_stopped)
+ up->rs485_stop_tx(up);
+ }
+
serial_port_out(port, UART_IER, ier);
/*
@@ -3182,7 +3289,6 @@ void serial8250_console_write(struct uart_8250_port *up, const char *s,
if (locked)
spin_unlock_irqrestore(&port->lock, flags);
- serial8250_rpm_put(up);
}
static unsigned int probe_baud(struct uart_port *port)
@@ -3206,6 +3312,7 @@ int serial8250_console_setup(struct uart_port *port, char *options, bool probe)
int bits = 8;
int parity = 'n';
int flow = 'n';
+ int ret;
if (!port->iobase && !port->membase)
return -ENODEV;
@@ -3215,7 +3322,22 @@ int serial8250_console_setup(struct uart_port *port, char *options, bool probe)
else if (probe)
baud = probe_baud(port);
- return uart_set_options(port, port->cons, baud, parity, bits, flow);
+ ret = uart_set_options(port, port->cons, baud, parity, bits, flow);
+ if (ret)
+ return ret;
+
+ if (port->dev)
+ pm_runtime_get_sync(port->dev);
+
+ return 0;
+}
+
+int serial8250_console_exit(struct uart_port *port)
+{
+ if (port->dev)
+ pm_runtime_put_sync(port->dev);
+
+ return 0;
}
#endif /* CONFIG_SERIAL_8250_CONSOLE */
diff --git a/drivers/tty/serial/8250/8250_pxa.c b/drivers/tty/serial/8250/8250_pxa.c
index c47188860e32..11612d174716 100644
--- a/drivers/tty/serial/8250/8250_pxa.c
+++ b/drivers/tty/serial/8250/8250_pxa.c
@@ -123,7 +123,7 @@ static int serial_pxa_probe(struct platform_device *pdev)
uart.port.regshift = 2;
uart.port.irq = irqres->start;
uart.port.fifosize = 64;
- uart.port.flags = UPF_IOREMAP | UPF_SKIP_TEST;
+ uart.port.flags = UPF_IOREMAP | UPF_SKIP_TEST | UPF_FIXED_TYPE;
uart.port.dev = &pdev->dev;
uart.port.uartclk = clk_get_rate(data->clk);
uart.port.pm = serial_pxa_pm;
diff --git a/drivers/tty/serial/8250/8250_tegra.c b/drivers/tty/serial/8250/8250_tegra.c
new file mode 100644
index 000000000000..c0ffad1572c6
--- /dev/null
+++ b/drivers/tty/serial/8250/8250_tegra.c
@@ -0,0 +1,198 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Serial Port driver for Tegra devices
+ *
+ * Copyright (c) 2020, NVIDIA CORPORATION. All rights reserved.
+ */
+
+#include <linux/acpi.h>
+#include <linux/clk.h>
+#include <linux/console.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/reset.h>
+#include <linux/slab.h>
+
+#include "8250.h"
+
+struct tegra_uart {
+ struct clk *clk;
+ struct reset_control *rst;
+ int line;
+};
+
+static void tegra_uart_handle_break(struct uart_port *p)
+{
+ unsigned int status, tmout = 10000;
+
+ do {
+ status = p->serial_in(p, UART_LSR);
+ if (status & (UART_LSR_FIFOE | UART_LSR_BRK_ERROR_BITS))
+ status = p->serial_in(p, UART_RX);
+ else
+ break;
+ if (--tmout == 0)
+ break;
+ udelay(1);
+ } while (1);
+}
+
+static int tegra_uart_probe(struct platform_device *pdev)
+{
+ struct uart_8250_port port8250;
+ struct tegra_uart *uart;
+ struct uart_port *port;
+ struct resource *res;
+ int ret;
+
+ uart = devm_kzalloc(&pdev->dev, sizeof(*uart), GFP_KERNEL);
+ if (!uart)
+ return -ENOMEM;
+
+ memset(&port8250, 0, sizeof(port8250));
+
+ port = &port8250.port;
+ spin_lock_init(&port->lock);
+
+ port->flags = UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF | UPF_FIXED_PORT |
+ UPF_FIXED_TYPE;
+ port->iotype = UPIO_MEM32;
+ port->regshift = 2;
+ port->type = PORT_TEGRA;
+ port->irqflags |= IRQF_SHARED;
+ port->dev = &pdev->dev;
+ port->handle_break = tegra_uart_handle_break;
+
+ ret = of_alias_get_id(pdev->dev.of_node, "serial");
+ if (ret >= 0)
+ port->line = ret;
+
+ ret = platform_get_irq(pdev, 0);
+ if (ret < 0)
+ return ret;
+
+ port->irq = ret;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -ENODEV;
+
+ port->membase = devm_ioremap(&pdev->dev, res->start,
+ resource_size(res));
+ if (!port->membase)
+ return -ENOMEM;
+
+ port->mapbase = res->start;
+ port->mapsize = resource_size(res);
+
+ uart->rst = devm_reset_control_get_optional_shared(&pdev->dev, NULL);
+ if (IS_ERR(uart->rst))
+ return PTR_ERR(uart->rst);
+
+ if (device_property_read_u32(&pdev->dev, "clock-frequency",
+ &port->uartclk)) {
+ uart->clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(uart->clk)) {
+ dev_err(&pdev->dev, "failed to get clock!\n");
+ return -ENODEV;
+ }
+
+ ret = clk_prepare_enable(uart->clk);
+ if (ret < 0)
+ return ret;
+
+ port->uartclk = clk_get_rate(uart->clk);
+ }
+
+ ret = reset_control_deassert(uart->rst);
+ if (ret)
+ goto err_clkdisable;
+
+ ret = serial8250_register_8250_port(&port8250);
+ if (ret < 0)
+ goto err_clkdisable;
+
+ platform_set_drvdata(pdev, uart);
+ uart->line = ret;
+
+ return 0;
+
+err_clkdisable:
+ clk_disable_unprepare(uart->clk);
+
+ return ret;
+}
+
+static int tegra_uart_remove(struct platform_device *pdev)
+{
+ struct tegra_uart *uart = platform_get_drvdata(pdev);
+
+ serial8250_unregister_port(uart->line);
+ reset_control_assert(uart->rst);
+ clk_disable_unprepare(uart->clk);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int tegra_uart_suspend(struct device *dev)
+{
+ struct tegra_uart *uart = dev_get_drvdata(dev);
+ struct uart_8250_port *port8250 = serial8250_get_port(uart->line);
+ struct uart_port *port = &port8250->port;
+
+ serial8250_suspend_port(uart->line);
+
+ if (!uart_console(port) || console_suspend_enabled)
+ clk_disable_unprepare(uart->clk);
+
+ return 0;
+}
+
+static int tegra_uart_resume(struct device *dev)
+{
+ struct tegra_uart *uart = dev_get_drvdata(dev);
+ struct uart_8250_port *port8250 = serial8250_get_port(uart->line);
+ struct uart_port *port = &port8250->port;
+
+ if (!uart_console(port) || console_suspend_enabled)
+ clk_prepare_enable(uart->clk);
+
+ serial8250_resume_port(uart->line);
+
+ return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(tegra_uart_pm_ops, tegra_uart_suspend,
+ tegra_uart_resume);
+
+static const struct of_device_id tegra_uart_of_match[] = {
+ { .compatible = "nvidia,tegra20-uart", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, tegra_uart_of_match);
+
+static const struct acpi_device_id tegra_uart_acpi_match[] = {
+ { "NVDA0100", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(acpi, tegra_uart_acpi_match);
+
+static struct platform_driver tegra_uart_driver = {
+ .driver = {
+ .name = "tegra-uart",
+ .pm = &tegra_uart_pm_ops,
+ .of_match_table = tegra_uart_of_match,
+ .acpi_match_table = ACPI_PTR(tegra_uart_acpi_match),
+ },
+ .probe = tegra_uart_probe,
+ .remove = tegra_uart_remove,
+};
+
+module_platform_driver(tegra_uart_driver);
+
+MODULE_AUTHOR("Jeff Brasen <jbrasen@nvidia.com>");
+MODULE_DESCRIPTION("NVIDIA Tegra 8250 Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig
index f16824bbb573..af0688156dd0 100644
--- a/drivers/tty/serial/8250/Kconfig
+++ b/drivers/tty/serial/8250/Kconfig
@@ -500,6 +500,15 @@ config SERIAL_8250_PXA
applicable to both devicetree and legacy boards, and early console is
part of its support.
+config SERIAL_8250_TEGRA
+ tristate "8250 support for Tegra serial ports"
+ default SERIAL_8250
+ depends on SERIAL_8250
+ depends on ARCH_TEGRA || COMPILE_TEST
+ help
+ Select this option if you have machine with an NVIDIA Tegra SoC and
+ wish to enable 8250 serial driver for the Tegra serial interfaces.
+
config SERIAL_OF_PLATFORM
tristate "Devicetree based probing for 8250 ports"
depends on SERIAL_8250 && OF
diff --git a/drivers/tty/serial/8250/Makefile b/drivers/tty/serial/8250/Makefile
index 51a6079d3f1f..a8bfb654d490 100644
--- a/drivers/tty/serial/8250/Makefile
+++ b/drivers/tty/serial/8250/Makefile
@@ -37,6 +37,7 @@ obj-$(CONFIG_SERIAL_8250_INGENIC) += 8250_ingenic.o
obj-$(CONFIG_SERIAL_8250_LPSS) += 8250_lpss.o
obj-$(CONFIG_SERIAL_8250_MID) += 8250_mid.o
obj-$(CONFIG_SERIAL_8250_PXA) += 8250_pxa.o
+obj-$(CONFIG_SERIAL_8250_TEGRA) += 8250_tegra.o
obj-$(CONFIG_SERIAL_OF_PLATFORM) += 8250_of.o
CFLAGS_8250_ingenic.o += -I$(srctree)/scripts/dtc/libfdt
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 52eaac21ff9f..d6644f3d81fc 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -260,15 +260,6 @@ config SERIAL_SAMSUNG_UARTS
help
Select the number of available UART ports for the Samsung S3C
serial driver
-
-config SERIAL_SAMSUNG_DEBUG
- bool "Samsung SoC serial debug"
- depends on SERIAL_SAMSUNG && DEBUG_LL
- help
- Add support for debugging the serial driver. Since this is
- generally being used as a console, we use our own output
- routines that go via the low-level debug printascii()
- function.
config SERIAL_SAMSUNG_CONSOLE
bool "Support for console on Samsung SoC serial port"
@@ -1111,7 +1102,7 @@ config SERIAL_SC16IS7XX_SPI
help
Enable SC16IS7xx driver on SPI bus,
If required say y, and say n to spi if not required,
- This is additional support to exsisting driver.
+ This is additional support to existing driver.
You must select at least one bus for the driver to be built.
config SERIAL_TIMBERDALE
@@ -1279,6 +1270,7 @@ config SERIAL_AR933X
tristate "AR933X serial port support"
depends on HAVE_CLK && ATH79
select SERIAL_CORE
+ select SERIAL_MCTRL_GPIO if GPIOLIB
help
If you have an Atheros AR933X SOC based board and want to use the
built-in UART of the SoC, say Y to this option.
@@ -1452,8 +1444,8 @@ config SERIAL_MEN_Z135
config SERIAL_SPRD
tristate "Support for Spreadtrum serial"
- depends on ARCH_SPRD
select SERIAL_CORE
+ depends on COMMON_CLK
help
This enables the driver for the Spreadtrum's serial.
diff --git a/drivers/tty/serial/ar933x_uart.c b/drivers/tty/serial/ar933x_uart.c
index ea12f10610b6..7e7f1398019f 100644
--- a/drivers/tty/serial/ar933x_uart.c
+++ b/drivers/tty/serial/ar933x_uart.c
@@ -13,6 +13,7 @@
#include <linux/console.h>
#include <linux/sysrq.h>
#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
#include <linux/platform_device.h>
#include <linux/of.h>
#include <linux/of_platform.h>
@@ -29,6 +30,8 @@
#include <asm/mach-ath79/ar933x_uart.h>
+#include "serial_mctrl_gpio.h"
+
#define DRIVER_NAME "ar933x-uart"
#define AR933X_UART_MAX_SCALE 0xff
@@ -47,6 +50,8 @@ struct ar933x_uart_port {
unsigned int min_baud;
unsigned int max_baud;
struct clk *clk;
+ struct mctrl_gpios *gpios;
+ struct gpio_desc *rts_gpiod;
};
static inline unsigned int ar933x_uart_read(struct ar933x_uart_port *up,
@@ -100,6 +105,18 @@ static inline void ar933x_uart_stop_tx_interrupt(struct ar933x_uart_port *up)
ar933x_uart_write(up, AR933X_UART_INT_EN_REG, up->ier);
}
+static inline void ar933x_uart_start_rx_interrupt(struct ar933x_uart_port *up)
+{
+ up->ier |= AR933X_UART_INT_RX_VALID;
+ ar933x_uart_write(up, AR933X_UART_INT_EN_REG, up->ier);
+}
+
+static inline void ar933x_uart_stop_rx_interrupt(struct ar933x_uart_port *up)
+{
+ up->ier &= ~AR933X_UART_INT_RX_VALID;
+ ar933x_uart_write(up, AR933X_UART_INT_EN_REG, up->ier);
+}
+
static inline void ar933x_uart_putc(struct ar933x_uart_port *up, int ch)
{
unsigned int rdata;
@@ -125,11 +142,21 @@ static unsigned int ar933x_uart_tx_empty(struct uart_port *port)
static unsigned int ar933x_uart_get_mctrl(struct uart_port *port)
{
- return TIOCM_CAR;
+ struct ar933x_uart_port *up =
+ container_of(port, struct ar933x_uart_port, port);
+ int ret = TIOCM_CTS | TIOCM_DSR | TIOCM_CAR;
+
+ mctrl_gpio_get(up->gpios, &ret);
+
+ return ret;
}
static void ar933x_uart_set_mctrl(struct uart_port *port, unsigned int mctrl)
{
+ struct ar933x_uart_port *up =
+ container_of(port, struct ar933x_uart_port, port);
+
+ mctrl_gpio_set(up->gpios, mctrl);
}
static void ar933x_uart_start_tx(struct uart_port *port)
@@ -140,6 +167,37 @@ static void ar933x_uart_start_tx(struct uart_port *port)
ar933x_uart_start_tx_interrupt(up);
}
+static void ar933x_uart_wait_tx_complete(struct ar933x_uart_port *up)
+{
+ unsigned int status;
+ unsigned int timeout = 60000;
+
+ /* Wait up to 60ms for the character(s) to be sent. */
+ do {
+ status = ar933x_uart_read(up, AR933X_UART_CS_REG);
+ if (--timeout == 0)
+ break;
+ udelay(1);
+ } while (status & AR933X_UART_CS_TX_BUSY);
+
+ if (timeout == 0)
+ dev_err(up->port.dev, "waiting for TX timed out\n");
+}
+
+static void ar933x_uart_rx_flush(struct ar933x_uart_port *up)
+{
+ unsigned int status;
+
+ /* clear RX_VALID interrupt */
+ ar933x_uart_write(up, AR933X_UART_INT_REG, AR933X_UART_INT_RX_VALID);
+
+ /* remove characters from the RX FIFO */
+ do {
+ ar933x_uart_write(up, AR933X_UART_DATA_REG, AR933X_UART_DATA_RX_CSR);
+ status = ar933x_uart_read(up, AR933X_UART_DATA_REG);
+ } while (status & AR933X_UART_DATA_RX_CSR);
+}
+
static void ar933x_uart_stop_tx(struct uart_port *port)
{
struct ar933x_uart_port *up =
@@ -153,8 +211,7 @@ static void ar933x_uart_stop_rx(struct uart_port *port)
struct ar933x_uart_port *up =
container_of(port, struct ar933x_uart_port, port);
- up->ier &= ~AR933X_UART_INT_RX_VALID;
- ar933x_uart_write(up, AR933X_UART_INT_EN_REG, up->ier);
+ ar933x_uart_stop_rx_interrupt(up);
}
static void ar933x_uart_break_ctl(struct uart_port *port, int break_state)
@@ -336,11 +393,20 @@ static void ar933x_uart_rx_chars(struct ar933x_uart_port *up)
static void ar933x_uart_tx_chars(struct ar933x_uart_port *up)
{
struct circ_buf *xmit = &up->port.state->xmit;
+ struct serial_rs485 *rs485conf = &up->port.rs485;
int count;
+ bool half_duplex_send = false;
if (uart_tx_stopped(&up->port))
return;
+ if ((rs485conf->flags & SER_RS485_ENABLED) &&
+ (up->port.x_char || !uart_circ_empty(xmit))) {
+ ar933x_uart_stop_rx_interrupt(up);
+ gpiod_set_value(up->rts_gpiod, !!(rs485conf->flags & SER_RS485_RTS_ON_SEND));
+ half_duplex_send = true;
+ }
+
count = up->port.fifosize;
do {
unsigned int rdata;
@@ -368,8 +434,14 @@ static void ar933x_uart_tx_chars(struct ar933x_uart_port *up)
if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
uart_write_wakeup(&up->port);
- if (!uart_circ_empty(xmit))
+ if (!uart_circ_empty(xmit)) {
ar933x_uart_start_tx_interrupt(up);
+ } else if (half_duplex_send) {
+ ar933x_uart_wait_tx_complete(up);
+ ar933x_uart_rx_flush(up);
+ ar933x_uart_start_rx_interrupt(up);
+ gpiod_set_value(up->rts_gpiod, !!(rs485conf->flags & SER_RS485_RTS_AFTER_SEND));
+ }
}
static irqreturn_t ar933x_uart_interrupt(int irq, void *dev_id)
@@ -427,8 +499,7 @@ static int ar933x_uart_startup(struct uart_port *port)
AR933X_UART_CS_TX_READY_ORIDE | AR933X_UART_CS_RX_READY_ORIDE);
/* Enable RX interrupts */
- up->ier = AR933X_UART_INT_RX_VALID;
- ar933x_uart_write(up, AR933X_UART_INT_EN_REG, up->ier);
+ ar933x_uart_start_rx_interrupt(up);
spin_unlock_irqrestore(&up->port.lock, flags);
@@ -511,6 +582,21 @@ static const struct uart_ops ar933x_uart_ops = {
.verify_port = ar933x_uart_verify_port,
};
+static int ar933x_config_rs485(struct uart_port *port,
+ struct serial_rs485 *rs485conf)
+{
+ struct ar933x_uart_port *up =
+ container_of(port, struct ar933x_uart_port, port);
+
+ if ((rs485conf->flags & SER_RS485_ENABLED) &&
+ !up->rts_gpiod) {
+ dev_err(port->dev, "RS485 needs rts-gpio\n");
+ return 1;
+ }
+ port->rs485 = *rs485conf;
+ return 0;
+}
+
#ifdef CONFIG_SERIAL_AR933X_CONSOLE
static struct ar933x_uart_port *
ar933x_console_ports[CONFIG_SERIAL_AR933X_NR_UARTS];
@@ -680,6 +766,8 @@ static int ar933x_uart_probe(struct platform_device *pdev)
goto err_disable_clk;
}
+ uart_get_rs485_mode(&pdev->dev, &port->rs485);
+
port->mapbase = mem_res->start;
port->line = id;
port->irq = irq_res->start;
@@ -690,6 +778,7 @@ static int ar933x_uart_probe(struct platform_device *pdev)
port->regshift = 2;
port->fifosize = AR933X_UART_FIFO_SIZE;
port->ops = &ar933x_uart_ops;
+ port->rs485_config = ar933x_config_rs485;
baud = ar933x_uart_get_baud(port->uartclk, AR933X_UART_MAX_SCALE, 1);
up->min_baud = max_t(unsigned int, baud, AR933X_UART_MIN_BAUD);
@@ -697,6 +786,18 @@ static int ar933x_uart_probe(struct platform_device *pdev)
baud = ar933x_uart_get_baud(port->uartclk, 0, AR933X_UART_MAX_STEP);
up->max_baud = min_t(unsigned int, baud, AR933X_UART_MAX_BAUD);
+ up->gpios = mctrl_gpio_init(port, 0);
+ if (IS_ERR(up->gpios) && PTR_ERR(up->gpios) != -ENOSYS)
+ return PTR_ERR(up->gpios);
+
+ up->rts_gpiod = mctrl_gpio_to_gpiod(up->gpios, UART_GPIO_RTS);
+
+ if ((port->rs485.flags & SER_RS485_ENABLED) &&
+ !up->rts_gpiod) {
+ dev_err(&pdev->dev, "lacking rts-gpio, disabling RS485\n");
+ port->rs485.flags &= ~SER_RS485_ENABLED;
+ }
+
#ifdef CONFIG_SERIAL_AR933X_CONSOLE
ar933x_console_ports[up->port.line] = up;
#endif
diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c
index a39c87a7c2e1..8d7080efad9b 100644
--- a/drivers/tty/serial/atmel_serial.c
+++ b/drivers/tty/serial/atmel_serial.c
@@ -20,15 +20,12 @@
#include <linux/platform_device.h>
#include <linux/of.h>
#include <linux/of_device.h>
-#include <linux/of_gpio.h>
#include <linux/dma-mapping.h>
#include <linux/dmaengine.h>
#include <linux/atmel_pdc.h>
#include <linux/uaccess.h>
#include <linux/platform_data/atmel.h>
#include <linux/timer.h>
-#include <linux/gpio.h>
-#include <linux/gpio/consumer.h>
#include <linux/err.h>
#include <linux/irq.h>
#include <linux/suspend.h>
@@ -2679,18 +2676,8 @@ static struct console atmel_console = {
#define ATMEL_CONSOLE_DEVICE (&atmel_console)
-static inline bool atmel_is_console_port(struct uart_port *port)
-{
- return port->cons && port->cons->index == port->line;
-}
-
#else
#define ATMEL_CONSOLE_DEVICE NULL
-
-static inline bool atmel_is_console_port(struct uart_port *port)
-{
- return false;
-}
#endif
static struct uart_driver atmel_uart = {
@@ -2719,14 +2706,14 @@ static int atmel_serial_suspend(struct platform_device *pdev,
struct uart_port *port = platform_get_drvdata(pdev);
struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
- if (atmel_is_console_port(port) && console_suspend_enabled) {
+ if (uart_console(port) && console_suspend_enabled) {
/* Drain the TX shifter */
while (!(atmel_uart_readl(port, ATMEL_US_CSR) &
ATMEL_US_TXEMPTY))
cpu_relax();
}
- if (atmel_is_console_port(port) && !console_suspend_enabled) {
+ if (uart_console(port) && !console_suspend_enabled) {
/* Cache register values as we won't get a full shutdown/startup
* cycle
*/
@@ -2762,7 +2749,7 @@ static int atmel_serial_resume(struct platform_device *pdev)
struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
unsigned long flags;
- if (atmel_is_console_port(port) && !console_suspend_enabled) {
+ if (uart_console(port) && !console_suspend_enabled) {
atmel_uart_writel(port, ATMEL_US_MR, atmel_port->cache.mr);
atmel_uart_writel(port, ATMEL_US_IER, atmel_port->cache.imr);
atmel_uart_writel(port, ATMEL_US_BRGR, atmel_port->cache.brgr);
@@ -2916,7 +2903,7 @@ static int atmel_serial_probe(struct platform_device *pdev)
goto err_add_port;
#ifdef CONFIG_SERIAL_ATMEL_CONSOLE
- if (atmel_is_console_port(&atmel_port->uart)
+ if (uart_console(&atmel_port->uart)
&& ATMEL_CONSOLE_DEVICE->flags & CON_ENABLED) {
/*
* The serial core enabled the clock for us, so undo
@@ -2959,7 +2946,7 @@ err_add_port:
kfree(atmel_port->rx_ring.buf);
atmel_port->rx_ring.buf = NULL;
err_alloc_ring:
- if (!atmel_is_console_port(&atmel_port->uart)) {
+ if (!uart_console(&atmel_port->uart)) {
clk_put(atmel_port->clk);
atmel_port->clk = NULL;
}
diff --git a/drivers/tty/serial/atmel_serial.h b/drivers/tty/serial/atmel_serial.h
index d811d4f2d0c0..0d8a0f9cc5c3 100644
--- a/drivers/tty/serial/atmel_serial.h
+++ b/drivers/tty/serial/atmel_serial.h
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0+
+/* SPDX-License-Identifier: GPL-2.0+ */
/*
* include/linux/atmel_serial.h
*
diff --git a/drivers/tty/serial/cpm_uart/cpm_uart.h b/drivers/tty/serial/cpm_uart/cpm_uart.h
index 9f175a92fb5d..6113b953ce25 100644
--- a/drivers/tty/serial/cpm_uart/cpm_uart.h
+++ b/drivers/tty/serial/cpm_uart/cpm_uart.h
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0
+/* SPDX-License-Identifier: GPL-2.0 */
/*
* Driver for CPM (SCC/SMC) serial ports
*
@@ -13,6 +13,8 @@
#include <linux/platform_device.h>
#include <linux/fs_uart_pd.h>
+struct gpio_desc;
+
#if defined(CONFIG_CPM2)
#include "cpm_uart_cpm2.h"
#elif defined(CONFIG_CPM1)
@@ -80,7 +82,7 @@ struct uart_cpm_port {
int wait_closing;
/* value to combine with opcode to form cpm command */
u32 command;
- int gpios[NUM_GPIOS];
+ struct gpio_desc *gpios[NUM_GPIOS];
};
extern int cpm_uart_nr;
diff --git a/drivers/tty/serial/cpm_uart/cpm_uart_core.c b/drivers/tty/serial/cpm_uart/cpm_uart_core.c
index d4b81b06e0cb..a04f74d2e854 100644
--- a/drivers/tty/serial/cpm_uart/cpm_uart_core.c
+++ b/drivers/tty/serial/cpm_uart/cpm_uart_core.c
@@ -30,8 +30,7 @@
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
-#include <linux/gpio.h>
-#include <linux/of_gpio.h>
+#include <linux/gpio/consumer.h>
#include <linux/clk.h>
#include <asm/io.h>
@@ -88,11 +87,11 @@ static void cpm_uart_set_mctrl(struct uart_port *port, unsigned int mctrl)
struct uart_cpm_port *pinfo =
container_of(port, struct uart_cpm_port, port);
- if (pinfo->gpios[GPIO_RTS] >= 0)
- gpio_set_value(pinfo->gpios[GPIO_RTS], !(mctrl & TIOCM_RTS));
+ if (pinfo->gpios[GPIO_RTS])
+ gpiod_set_value(pinfo->gpios[GPIO_RTS], !(mctrl & TIOCM_RTS));
- if (pinfo->gpios[GPIO_DTR] >= 0)
- gpio_set_value(pinfo->gpios[GPIO_DTR], !(mctrl & TIOCM_DTR));
+ if (pinfo->gpios[GPIO_DTR])
+ gpiod_set_value(pinfo->gpios[GPIO_DTR], !(mctrl & TIOCM_DTR));
}
static unsigned int cpm_uart_get_mctrl(struct uart_port *port)
@@ -101,23 +100,23 @@ static unsigned int cpm_uart_get_mctrl(struct uart_port *port)
container_of(port, struct uart_cpm_port, port);
unsigned int mctrl = TIOCM_CTS | TIOCM_DSR | TIOCM_CAR;
- if (pinfo->gpios[GPIO_CTS] >= 0) {
- if (gpio_get_value(pinfo->gpios[GPIO_CTS]))
+ if (pinfo->gpios[GPIO_CTS]) {
+ if (gpiod_get_value(pinfo->gpios[GPIO_CTS]))
mctrl &= ~TIOCM_CTS;
}
- if (pinfo->gpios[GPIO_DSR] >= 0) {
- if (gpio_get_value(pinfo->gpios[GPIO_DSR]))
+ if (pinfo->gpios[GPIO_DSR]) {
+ if (gpiod_get_value(pinfo->gpios[GPIO_DSR]))
mctrl &= ~TIOCM_DSR;
}
- if (pinfo->gpios[GPIO_DCD] >= 0) {
- if (gpio_get_value(pinfo->gpios[GPIO_DCD]))
+ if (pinfo->gpios[GPIO_DCD]) {
+ if (gpiod_get_value(pinfo->gpios[GPIO_DCD]))
mctrl &= ~TIOCM_CAR;
}
- if (pinfo->gpios[GPIO_RI] >= 0) {
- if (!gpio_get_value(pinfo->gpios[GPIO_RI]))
+ if (pinfo->gpios[GPIO_RI]) {
+ if (!gpiod_get_value(pinfo->gpios[GPIO_RI]))
mctrl |= TIOCM_RNG;
}
@@ -1139,6 +1138,7 @@ static int cpm_uart_init_port(struct device_node *np,
{
const u32 *data;
void __iomem *mem, *pram;
+ struct device *dev = pinfo->port.dev;
int len;
int ret;
int i;
@@ -1211,29 +1211,23 @@ static int cpm_uart_init_port(struct device_node *np,
}
for (i = 0; i < NUM_GPIOS; i++) {
- int gpio;
+ struct gpio_desc *gpiod;
- pinfo->gpios[i] = -1;
+ pinfo->gpios[i] = NULL;
- gpio = of_get_gpio(np, i);
+ gpiod = devm_gpiod_get_index(dev, NULL, i, GPIOD_ASIS);
- if (gpio_is_valid(gpio)) {
- ret = gpio_request(gpio, "cpm_uart");
- if (ret) {
- pr_err("can't request gpio #%d: %d\n", i, ret);
- continue;
- }
+ if (gpiod) {
if (i == GPIO_RTS || i == GPIO_DTR)
- ret = gpio_direction_output(gpio, 0);
+ ret = gpiod_direction_output(gpiod, 0);
else
- ret = gpio_direction_input(gpio);
+ ret = gpiod_direction_input(gpiod);
if (ret) {
pr_err("can't set direction for gpio #%d: %d\n",
i, ret);
- gpio_free(gpio);
continue;
}
- pinfo->gpios[i] = gpio;
+ pinfo->gpios[i] = gpiod;
}
}
diff --git a/drivers/tty/serial/earlycon.c b/drivers/tty/serial/earlycon.c
index c14873b67803..2ae9190b64bb 100644
--- a/drivers/tty/serial/earlycon.c
+++ b/drivers/tty/serial/earlycon.c
@@ -170,6 +170,7 @@ static int __init register_earlycon(char *buf, const struct earlycon_id *match)
int __init setup_earlycon(char *buf)
{
const struct earlycon_id **p_match;
+ bool empty_compatible = true;
if (!buf || !buf[0])
return -EINVAL;
@@ -177,6 +178,7 @@ int __init setup_earlycon(char *buf)
if (early_con.flags & CON_ENABLED)
return -EALREADY;
+again:
for (p_match = __earlycon_table; p_match < __earlycon_table_end;
p_match++) {
const struct earlycon_id *match = *p_match;
@@ -185,6 +187,10 @@ int __init setup_earlycon(char *buf)
if (strncmp(buf, match->name, len))
continue;
+ /* prefer entries with empty compatible */
+ if (empty_compatible && *match->compatible)
+ continue;
+
if (buf[len]) {
if (buf[len] != ',')
continue;
@@ -195,6 +201,11 @@ int __init setup_earlycon(char *buf)
return register_earlycon(buf, match);
}
+ if (empty_compatible) {
+ empty_compatible = false;
+ goto again;
+ }
+
return -ENOENT;
}
diff --git a/drivers/tty/serial/efm32-uart.c b/drivers/tty/serial/efm32-uart.c
index 2ac87128d7fd..f12f29cf4f31 100644
--- a/drivers/tty/serial/efm32-uart.c
+++ b/drivers/tty/serial/efm32-uart.c
@@ -200,7 +200,7 @@ static void efm32_uart_rx_chars(struct efm32_uart_port *efm_port)
/*
* This is a reserved bit and I only saw it read as 0. But to be
* sure not to be confused too much by new devices adhere to the
- * warning in the reference manual that reserverd bits might
+ * warning in the reference manual that reserved bits might
* read as 1 in the future.
*/
rxdata &= ~SW_UARTn_RXDATAX_BERR;
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index c31b8f3db6bf..5d41075964f2 100644
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -234,6 +234,7 @@ static DEFINE_IDA(fsl_lpuart_ida);
enum lpuart_type {
VF610_LPUART,
LS1021A_LPUART,
+ LS1028A_LPUART,
IMX7ULP_LPUART,
IMX8QXP_LPUART,
};
@@ -278,11 +279,16 @@ static const struct lpuart_soc_data vf_data = {
.iotype = UPIO_MEM,
};
-static const struct lpuart_soc_data ls_data = {
+static const struct lpuart_soc_data ls1021a_data = {
.devtype = LS1021A_LPUART,
.iotype = UPIO_MEM32BE,
};
+static const struct lpuart_soc_data ls1028a_data = {
+ .devtype = LS1028A_LPUART,
+ .iotype = UPIO_MEM32,
+};
+
static struct lpuart_soc_data imx7ulp_data = {
.devtype = IMX7ULP_LPUART,
.iotype = UPIO_MEM32,
@@ -297,7 +303,8 @@ static struct lpuart_soc_data imx8qxp_data = {
static const struct of_device_id lpuart_dt_ids[] = {
{ .compatible = "fsl,vf610-lpuart", .data = &vf_data, },
- { .compatible = "fsl,ls1021a-lpuart", .data = &ls_data, },
+ { .compatible = "fsl,ls1021a-lpuart", .data = &ls1021a_data, },
+ { .compatible = "fsl,ls1028a-lpuart", .data = &ls1028a_data, },
{ .compatible = "fsl,imx7ulp-lpuart", .data = &imx7ulp_data, },
{ .compatible = "fsl,imx8qxp-lpuart", .data = &imx8qxp_data, },
{ /* sentinel */ }
@@ -307,6 +314,11 @@ MODULE_DEVICE_TABLE(of, lpuart_dt_ids);
/* Forward declare this for the dma callbacks*/
static void lpuart_dma_tx_complete(void *arg);
+static inline bool is_ls1028a_lpuart(struct lpuart_port *sport)
+{
+ return sport->devtype == LS1028A_LPUART;
+}
+
static inline bool is_imx8qxp_lpuart(struct lpuart_port *sport)
{
return sport->devtype == IMX8QXP_LPUART;
@@ -409,6 +421,7 @@ static void lpuart_dma_tx(struct lpuart_port *sport)
struct circ_buf *xmit = &sport->port.state->xmit;
struct scatterlist *sgl = sport->tx_sgl;
struct device *dev = sport->port.dev;
+ struct dma_chan *chan = sport->dma_tx_chan;
int ret;
if (sport->dma_tx_in_progress)
@@ -427,17 +440,19 @@ static void lpuart_dma_tx(struct lpuart_port *sport)
sg_set_buf(sgl + 1, xmit->buf, xmit->head);
}
- ret = dma_map_sg(dev, sgl, sport->dma_tx_nents, DMA_TO_DEVICE);
+ ret = dma_map_sg(chan->device->dev, sgl, sport->dma_tx_nents,
+ DMA_TO_DEVICE);
if (!ret) {
dev_err(dev, "DMA mapping error for TX.\n");
return;
}
- sport->dma_tx_desc = dmaengine_prep_slave_sg(sport->dma_tx_chan, sgl,
+ sport->dma_tx_desc = dmaengine_prep_slave_sg(chan, sgl,
ret, DMA_MEM_TO_DEV,
DMA_PREP_INTERRUPT);
if (!sport->dma_tx_desc) {
- dma_unmap_sg(dev, sgl, sport->dma_tx_nents, DMA_TO_DEVICE);
+ dma_unmap_sg(chan->device->dev, sgl, sport->dma_tx_nents,
+ DMA_TO_DEVICE);
dev_err(dev, "Cannot prepare TX slave DMA!\n");
return;
}
@@ -446,7 +461,7 @@ static void lpuart_dma_tx(struct lpuart_port *sport)
sport->dma_tx_desc->callback_param = sport;
sport->dma_tx_in_progress = true;
sport->dma_tx_cookie = dmaengine_submit(sport->dma_tx_desc);
- dma_async_issue_pending(sport->dma_tx_chan);
+ dma_async_issue_pending(chan);
}
static bool lpuart_stopped_or_empty(struct uart_port *port)
@@ -459,11 +474,13 @@ static void lpuart_dma_tx_complete(void *arg)
struct lpuart_port *sport = arg;
struct scatterlist *sgl = &sport->tx_sgl[0];
struct circ_buf *xmit = &sport->port.state->xmit;
+ struct dma_chan *chan = sport->dma_tx_chan;
unsigned long flags;
spin_lock_irqsave(&sport->port.lock, flags);
- dma_unmap_sg(sport->port.dev, sgl, sport->dma_tx_nents, DMA_TO_DEVICE);
+ dma_unmap_sg(chan->device->dev, sgl, sport->dma_tx_nents,
+ DMA_TO_DEVICE);
xmit->tail = (xmit->tail + sport->dma_tx_bytes) & (UART_XMIT_SIZE - 1);
@@ -529,15 +546,16 @@ static bool lpuart_is_32(struct lpuart_port *sport)
static void lpuart_flush_buffer(struct uart_port *port)
{
struct lpuart_port *sport = container_of(port, struct lpuart_port, port);
+ struct dma_chan *chan = sport->dma_tx_chan;
u32 val;
if (sport->lpuart_dma_tx_use) {
if (sport->dma_tx_in_progress) {
- dma_unmap_sg(sport->port.dev, &sport->tx_sgl[0],
+ dma_unmap_sg(chan->device->dev, &sport->tx_sgl[0],
sport->dma_tx_nents, DMA_TO_DEVICE);
sport->dma_tx_in_progress = false;
}
- dmaengine_terminate_all(sport->dma_tx_chan);
+ dmaengine_terminate_all(chan);
}
if (lpuart_is_32(sport)) {
@@ -993,6 +1011,7 @@ static void lpuart_copy_rx_to_tty(struct lpuart_port *sport)
struct tty_port *port = &sport->port.state->port;
struct dma_tx_state state;
enum dma_status dmastat;
+ struct dma_chan *chan = sport->dma_rx_chan;
struct circ_buf *ring = &sport->rx_ring;
unsigned long flags;
int count = 0;
@@ -1053,10 +1072,7 @@ static void lpuart_copy_rx_to_tty(struct lpuart_port *sport)
spin_lock_irqsave(&sport->port.lock, flags);
- dmastat = dmaengine_tx_status(sport->dma_rx_chan,
- sport->dma_rx_cookie,
- &state);
-
+ dmastat = dmaengine_tx_status(chan, sport->dma_rx_cookie, &state);
if (dmastat == DMA_ERROR) {
dev_err(sport->port.dev, "Rx DMA transfer failed!\n");
spin_unlock_irqrestore(&sport->port.lock, flags);
@@ -1064,7 +1080,8 @@ static void lpuart_copy_rx_to_tty(struct lpuart_port *sport)
}
/* CPU claims ownership of RX DMA buffer */
- dma_sync_sg_for_cpu(sport->port.dev, &sport->rx_sgl, 1, DMA_FROM_DEVICE);
+ dma_sync_sg_for_cpu(chan->device->dev, &sport->rx_sgl, 1,
+ DMA_FROM_DEVICE);
/*
* ring->head points to the end of data already written by the DMA.
@@ -1106,7 +1123,7 @@ static void lpuart_copy_rx_to_tty(struct lpuart_port *sport)
sport->port.icount.rx += count;
}
- dma_sync_sg_for_device(sport->port.dev, &sport->rx_sgl, 1,
+ dma_sync_sg_for_device(chan->device->dev, &sport->rx_sgl, 1,
DMA_FROM_DEVICE);
spin_unlock_irqrestore(&sport->port.lock, flags);
@@ -1138,6 +1155,7 @@ static inline int lpuart_start_rx_dma(struct lpuart_port *sport)
struct tty_port *port = &sport->port.state->port;
struct tty_struct *tty = port->tty;
struct ktermios *termios = &tty->termios;
+ struct dma_chan *chan = sport->dma_rx_chan;
baud = tty_get_baud_rate(tty);
@@ -1159,7 +1177,8 @@ static inline int lpuart_start_rx_dma(struct lpuart_port *sport)
return -ENOMEM;
sg_init_one(&sport->rx_sgl, ring->buf, sport->rx_dma_rng_buf_len);
- nent = dma_map_sg(sport->port.dev, &sport->rx_sgl, 1, DMA_FROM_DEVICE);
+ nent = dma_map_sg(chan->device->dev, &sport->rx_sgl, 1,
+ DMA_FROM_DEVICE);
if (!nent) {
dev_err(sport->port.dev, "DMA Rx mapping error\n");
@@ -1170,7 +1189,7 @@ static inline int lpuart_start_rx_dma(struct lpuart_port *sport)
dma_rx_sconfig.src_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
dma_rx_sconfig.src_maxburst = 1;
dma_rx_sconfig.direction = DMA_DEV_TO_MEM;
- ret = dmaengine_slave_config(sport->dma_rx_chan, &dma_rx_sconfig);
+ ret = dmaengine_slave_config(chan, &dma_rx_sconfig);
if (ret < 0) {
dev_err(sport->port.dev,
@@ -1178,7 +1197,7 @@ static inline int lpuart_start_rx_dma(struct lpuart_port *sport)
return ret;
}
- sport->dma_rx_desc = dmaengine_prep_dma_cyclic(sport->dma_rx_chan,
+ sport->dma_rx_desc = dmaengine_prep_dma_cyclic(chan,
sg_dma_address(&sport->rx_sgl),
sport->rx_sgl.length,
sport->rx_sgl.length / 2,
@@ -1192,7 +1211,7 @@ static inline int lpuart_start_rx_dma(struct lpuart_port *sport)
sport->dma_rx_desc->callback = lpuart_dma_rx_complete;
sport->dma_rx_desc->callback_param = sport;
sport->dma_rx_cookie = dmaengine_submit(sport->dma_rx_desc);
- dma_async_issue_pending(sport->dma_rx_chan);
+ dma_async_issue_pending(chan);
if (lpuart_is_32(sport)) {
unsigned long temp = lpuart32_read(&sport->port, UARTBAUD);
@@ -1210,11 +1229,12 @@ static void lpuart_dma_rx_free(struct uart_port *port)
{
struct lpuart_port *sport = container_of(port,
struct lpuart_port, port);
+ struct dma_chan *chan = sport->dma_rx_chan;
- if (sport->dma_rx_chan)
- dmaengine_terminate_all(sport->dma_rx_chan);
+ if (chan)
+ dmaengine_terminate_all(chan);
- dma_unmap_sg(sport->port.dev, &sport->rx_sgl, 1, DMA_FROM_DEVICE);
+ dma_unmap_sg(chan->device->dev, &sport->rx_sgl, 1, DMA_FROM_DEVICE);
kfree(sport->rx_ring.buf);
sport->rx_ring.tail = 0;
sport->rx_ring.head = 0;
@@ -1490,39 +1510,77 @@ static void rx_dma_timer_init(struct lpuart_port *sport)
add_timer(&sport->lpuart_timer);
}
+static void lpuart_request_dma(struct lpuart_port *sport)
+{
+ sport->dma_tx_chan = dma_request_chan(sport->port.dev, "tx");
+ if (IS_ERR(sport->dma_tx_chan)) {
+ dev_info_once(sport->port.dev,
+ "DMA tx channel request failed, operating without tx DMA (%ld)\n",
+ PTR_ERR(sport->dma_tx_chan));
+ sport->dma_tx_chan = NULL;
+ }
+
+ sport->dma_rx_chan = dma_request_chan(sport->port.dev, "rx");
+ if (IS_ERR(sport->dma_rx_chan)) {
+ dev_info_once(sport->port.dev,
+ "DMA rx channel request failed, operating without rx DMA (%ld)\n",
+ PTR_ERR(sport->dma_rx_chan));
+ sport->dma_rx_chan = NULL;
+ }
+}
+
static void lpuart_tx_dma_startup(struct lpuart_port *sport)
{
u32 uartbaud;
+ int ret;
- if (sport->dma_tx_chan && !lpuart_dma_tx_request(&sport->port)) {
- init_waitqueue_head(&sport->dma_wait);
- sport->lpuart_dma_tx_use = true;
- if (lpuart_is_32(sport)) {
- uartbaud = lpuart32_read(&sport->port, UARTBAUD);
- lpuart32_write(&sport->port,
- uartbaud | UARTBAUD_TDMAE, UARTBAUD);
- } else {
- writeb(readb(sport->port.membase + UARTCR5) |
- UARTCR5_TDMAS, sport->port.membase + UARTCR5);
- }
+ if (!sport->dma_tx_chan)
+ goto err;
+
+ ret = lpuart_dma_tx_request(&sport->port);
+ if (ret)
+ goto err;
+
+ init_waitqueue_head(&sport->dma_wait);
+ sport->lpuart_dma_tx_use = true;
+ if (lpuart_is_32(sport)) {
+ uartbaud = lpuart32_read(&sport->port, UARTBAUD);
+ lpuart32_write(&sport->port,
+ uartbaud | UARTBAUD_TDMAE, UARTBAUD);
} else {
- sport->lpuart_dma_tx_use = false;
+ writeb(readb(sport->port.membase + UARTCR5) |
+ UARTCR5_TDMAS, sport->port.membase + UARTCR5);
}
+
+ return;
+
+err:
+ sport->lpuart_dma_tx_use = false;
}
static void lpuart_rx_dma_startup(struct lpuart_port *sport)
{
- if (sport->dma_rx_chan && !lpuart_start_rx_dma(sport)) {
- /* set Rx DMA timeout */
- sport->dma_rx_timeout = msecs_to_jiffies(DMA_RX_TIMEOUT);
- if (!sport->dma_rx_timeout)
- sport->dma_rx_timeout = 1;
+ int ret;
- sport->lpuart_dma_rx_use = true;
- rx_dma_timer_init(sport);
- } else {
- sport->lpuart_dma_rx_use = false;
- }
+ if (!sport->dma_rx_chan)
+ goto err;
+
+ ret = lpuart_start_rx_dma(sport);
+ if (ret)
+ goto err;
+
+ /* set Rx DMA timeout */
+ sport->dma_rx_timeout = msecs_to_jiffies(DMA_RX_TIMEOUT);
+ if (!sport->dma_rx_timeout)
+ sport->dma_rx_timeout = 1;
+
+ sport->lpuart_dma_rx_use = true;
+ rx_dma_timer_init(sport);
+
+ return;
+
+err:
+ sport->lpuart_dma_rx_use = false;
}
static int lpuart_startup(struct uart_port *port)
@@ -1541,6 +1599,8 @@ static int lpuart_startup(struct uart_port *port)
sport->rxfifo_size = UARTFIFO_DEPTH((temp >> UARTPFIFO_RXSIZE_OFF) &
UARTPFIFO_FIFOSIZE_MASK);
+ lpuart_request_dma(sport);
+
spin_lock_irqsave(&sport->port.lock, flags);
lpuart_setup_watermark_enable(sport);
@@ -1587,11 +1647,23 @@ static int lpuart32_startup(struct uart_port *port)
sport->rxfifo_size = UARTFIFO_DEPTH((temp >> UARTFIFO_RXSIZE_OFF) &
UARTFIFO_FIFOSIZE_MASK);
+ /*
+ * The LS1028A has a fixed length of 16 words. Although it supports the
+ * RX/TXSIZE fields their encoding is different. Eg the reference manual
+ * states 0b101 is 16 words.
+ */
+ if (is_ls1028a_lpuart(sport)) {
+ sport->rxfifo_size = 16;
+ sport->txfifo_size = 16;
+ sport->port.fifosize = sport->txfifo_size;
+ }
+
+ lpuart_request_dma(sport);
+
spin_lock_irqsave(&sport->port.lock, flags);
lpuart32_setup_watermark_enable(sport);
-
lpuart_rx_dma_startup(sport);
lpuart_tx_dma_startup(sport);
@@ -1615,6 +1687,11 @@ static void lpuart_dma_shutdown(struct lpuart_port *sport)
dmaengine_terminate_all(sport->dma_tx_chan);
}
}
+
+ if (sport->dma_tx_chan)
+ dma_release_channel(sport->dma_tx_chan);
+ if (sport->dma_rx_chan)
+ dma_release_channel(sport->dma_rx_chan);
}
static void lpuart_shutdown(struct uart_port *port)
@@ -1811,11 +1888,12 @@ lpuart_set_termios(struct uart_port *port, struct ktermios *termios,
spin_unlock_irqrestore(&sport->port.lock, flags);
}
-static void
-lpuart32_serial_setbrg(struct lpuart_port *sport, unsigned int baudrate)
+static void __lpuart32_serial_setbrg(struct uart_port *port,
+ unsigned int baudrate, bool use_rx_dma,
+ bool use_tx_dma)
{
u32 sbr, osr, baud_diff, tmp_osr, tmp_sbr, tmp_diff, tmp;
- u32 clk = sport->port.uartclk;
+ u32 clk = port->uartclk;
/*
* The idea is to use the best OSR (over-sampling rate) possible.
@@ -1861,10 +1939,10 @@ lpuart32_serial_setbrg(struct lpuart_port *sport, unsigned int baudrate)
/* handle buadrate outside acceptable rate */
if (baud_diff > ((baudrate / 100) * 3))
- dev_warn(sport->port.dev,
+ dev_warn(port->dev,
"unacceptable baud rate difference of more than 3%%\n");
- tmp = lpuart32_read(&sport->port, UARTBAUD);
+ tmp = lpuart32_read(port, UARTBAUD);
if ((osr > 3) && (osr < 8))
tmp |= UARTBAUD_BOTHEDGE;
@@ -1875,14 +1953,23 @@ lpuart32_serial_setbrg(struct lpuart_port *sport, unsigned int baudrate)
tmp &= ~UARTBAUD_SBR_MASK;
tmp |= sbr & UARTBAUD_SBR_MASK;
- if (!sport->lpuart_dma_rx_use)
+ if (!use_rx_dma)
tmp &= ~UARTBAUD_RDMAE;
- if (!sport->lpuart_dma_tx_use)
+ if (!use_tx_dma)
tmp &= ~UARTBAUD_TDMAE;
- lpuart32_write(&sport->port, tmp, UARTBAUD);
+ lpuart32_write(port, tmp, UARTBAUD);
+}
+
+static void lpuart32_serial_setbrg(struct lpuart_port *sport,
+ unsigned int baudrate)
+{
+ __lpuart32_serial_setbrg(&sport->port, baudrate,
+ sport->lpuart_dma_rx_use,
+ sport->lpuart_dma_tx_use);
}
+
static void
lpuart32_set_termios(struct uart_port *port, struct ktermios *termios,
struct ktermios *old)
@@ -2376,6 +2463,30 @@ static int __init lpuart32_early_console_setup(struct earlycon_device *device,
return 0;
}
+static int __init ls1028a_early_console_setup(struct earlycon_device *device,
+ const char *opt)
+{
+ u32 cr;
+
+ if (!device->port.membase)
+ return -ENODEV;
+
+ device->port.iotype = UPIO_MEM32;
+ device->con->write = lpuart32_early_write;
+
+ /* set the baudrate */
+ if (device->port.uartclk && device->baud)
+ __lpuart32_serial_setbrg(&device->port, device->baud,
+ false, false);
+
+ /* enable transmitter */
+ cr = lpuart32_read(&device->port, UARTCTRL);
+ cr |= UARTCTRL_TE;
+ lpuart32_write(&device->port, cr, UARTCTRL);
+
+ return 0;
+}
+
static int __init lpuart32_imx_early_console_setup(struct earlycon_device *device,
const char *opt)
{
@@ -2390,6 +2501,7 @@ static int __init lpuart32_imx_early_console_setup(struct earlycon_device *devic
}
OF_EARLYCON_DECLARE(lpuart, "fsl,vf610-lpuart", lpuart_early_console_setup);
OF_EARLYCON_DECLARE(lpuart32, "fsl,ls1021a-lpuart", lpuart32_early_console_setup);
+OF_EARLYCON_DECLARE(lpuart32, "fsl,ls1028a-lpuart", ls1028a_early_console_setup);
OF_EARLYCON_DECLARE(lpuart32, "fsl,imx7ulp-lpuart", lpuart32_imx_early_console_setup);
EARLYCON_DECLARE(lpuart, lpuart_early_console_setup);
EARLYCON_DECLARE(lpuart32, lpuart32_early_console_setup);
@@ -2520,16 +2632,6 @@ static int lpuart_probe(struct platform_device *pdev)
sport->port.rs485_config(&sport->port, &sport->port.rs485);
- sport->dma_tx_chan = dma_request_slave_channel(sport->port.dev, "tx");
- if (!sport->dma_tx_chan)
- dev_info(sport->port.dev, "DMA tx channel request failed, "
- "operating without tx DMA\n");
-
- sport->dma_rx_chan = dma_request_slave_channel(sport->port.dev, "rx");
- if (!sport->dma_rx_chan)
- dev_info(sport->port.dev, "DMA rx channel request failed, "
- "operating without rx DMA\n");
-
return 0;
failed_attach_port:
diff --git a/drivers/tty/serial/icom.h b/drivers/tty/serial/icom.h
index 8a77e739b333..26e3aa7b01e2 100644
--- a/drivers/tty/serial/icom.h
+++ b/drivers/tty/serial/icom.h
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0+
+/* SPDX-License-Identifier: GPL-2.0+ */
/*
* icom.h
*
diff --git a/drivers/tty/serial/ifx6x60.c b/drivers/tty/serial/ifx6x60.c
index 31033d517e82..7d16fe41932f 100644
--- a/drivers/tty/serial/ifx6x60.c
+++ b/drivers/tty/serial/ifx6x60.c
@@ -39,7 +39,7 @@
#include <linux/fs.h>
#include <linux/ip.h>
#include <linux/dmapool.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
#include <linux/sched.h>
#include <linux/time.h>
#include <linux/wait.h>
@@ -61,7 +61,6 @@
#define IFX_SPI_HEADER_F (-2)
#define PO_POST_DELAY 200
-#define IFX_MDM_RST_PMU 4
/* forward reference */
static void ifx_spi_handle_srdy(struct ifx_spi_device *ifx_dev);
@@ -81,7 +80,7 @@ static struct notifier_block ifx_modem_reboot_notifier_block = {
static int ifx_modem_power_off(struct ifx_spi_device *ifx_dev)
{
- gpio_set_value(IFX_MDM_RST_PMU, 1);
+ gpiod_set_value(ifx_dev->gpio.pmu_reset, 1);
msleep(PO_POST_DELAY);
return 0;
@@ -107,7 +106,7 @@ static int ifx_modem_reboot_callback(struct notifier_block *nfb,
*/
static inline void mrdy_set_high(struct ifx_spi_device *ifx)
{
- gpio_set_value(ifx->gpio.mrdy, 1);
+ gpiod_set_value(ifx->gpio.mrdy, 1);
}
/**
@@ -117,7 +116,7 @@ static inline void mrdy_set_high(struct ifx_spi_device *ifx)
*/
static inline void mrdy_set_low(struct ifx_spi_device *ifx)
{
- gpio_set_value(ifx->gpio.mrdy, 0);
+ gpiod_set_value(ifx->gpio.mrdy, 0);
}
/**
@@ -244,7 +243,7 @@ static inline void swap_buf_32(unsigned char *buf, int len, void *end)
*/
static void mrdy_assert(struct ifx_spi_device *ifx_dev)
{
- int val = gpio_get_value(ifx_dev->gpio.srdy);
+ int val = gpiod_get_value(ifx_dev->gpio.srdy);
if (!val) {
if (!test_and_set_bit(IFX_SPI_STATE_TIMER_PENDING,
&ifx_dev->flags)) {
@@ -691,7 +690,7 @@ complete_exit:
clear_bit(IFX_SPI_STATE_IO_IN_PROGRESS, &(ifx_dev->flags));
queue_length = kfifo_len(&ifx_dev->tx_fifo);
- srdy = gpio_get_value(ifx_dev->gpio.srdy);
+ srdy = gpiod_get_value(ifx_dev->gpio.srdy);
if (!srdy)
ifx_spi_power_state_clear(ifx_dev, IFX_SPI_POWER_SRDY);
@@ -898,7 +897,7 @@ static irqreturn_t ifx_spi_srdy_interrupt(int irq, void *dev)
static irqreturn_t ifx_spi_reset_interrupt(int irq, void *dev)
{
struct ifx_spi_device *ifx_dev = dev;
- int val = gpio_get_value(ifx_dev->gpio.reset_out);
+ int val = gpiod_get_value(ifx_dev->gpio.reset_out);
int solreset = test_bit(MR_START, &ifx_dev->mdm_reset_state);
if (val == 0) {
@@ -954,14 +953,14 @@ static int ifx_spi_reset(struct ifx_spi_device *ifx_dev)
* to reset properly
*/
set_bit(MR_START, &ifx_dev->mdm_reset_state);
- gpio_set_value(ifx_dev->gpio.po, 0);
- gpio_set_value(ifx_dev->gpio.reset, 0);
+ gpiod_set_value(ifx_dev->gpio.po, 0);
+ gpiod_set_value(ifx_dev->gpio.reset, 0);
msleep(25);
- gpio_set_value(ifx_dev->gpio.reset, 1);
+ gpiod_set_value(ifx_dev->gpio.reset, 1);
msleep(1);
- gpio_set_value(ifx_dev->gpio.po, 1);
+ gpiod_set_value(ifx_dev->gpio.po, 1);
msleep(1);
- gpio_set_value(ifx_dev->gpio.po, 0);
+ gpiod_set_value(ifx_dev->gpio.po, 0);
ret = wait_event_timeout(ifx_dev->mdm_reset_wait,
test_bit(MR_COMPLETE,
&ifx_dev->mdm_reset_state),
@@ -992,22 +991,23 @@ static int ifx_spi_spi_probe(struct spi_device *spi)
int srdy;
struct ifx_modem_platform_data *pl_data;
struct ifx_spi_device *ifx_dev;
+ struct device *dev = &spi->dev;
if (saved_ifx_dev) {
- dev_dbg(&spi->dev, "ignoring subsequent detection");
+ dev_dbg(dev, "ignoring subsequent detection");
return -ENODEV;
}
- pl_data = dev_get_platdata(&spi->dev);
+ pl_data = dev_get_platdata(dev);
if (!pl_data) {
- dev_err(&spi->dev, "missing platform data!");
+ dev_err(dev, "missing platform data!");
return -ENODEV;
}
/* initialize structure to hold our device variables */
ifx_dev = kzalloc(sizeof(struct ifx_spi_device), GFP_KERNEL);
if (!ifx_dev) {
- dev_err(&spi->dev, "spi device allocation failed");
+ dev_err(dev, "spi device allocation failed");
return -ENOMEM;
}
saved_ifx_dev = ifx_dev;
@@ -1026,7 +1026,7 @@ static int ifx_spi_spi_probe(struct spi_device *spi)
spi->bits_per_word = spi_bpw;
ret = spi_setup(spi);
if (ret) {
- dev_err(&spi->dev, "SPI setup wasn't successful %d", ret);
+ dev_err(dev, "SPI setup wasn't successful %d", ret);
kfree(ifx_dev);
return -ENODEV;
}
@@ -1049,7 +1049,7 @@ static int ifx_spi_spi_probe(struct spi_device *spi)
&ifx_dev->tx_bus,
GFP_KERNEL);
if (!ifx_dev->tx_buffer) {
- dev_err(&spi->dev, "DMA-TX buffer allocation failed");
+ dev_err(dev, "DMA-TX buffer allocation failed");
ret = -ENOMEM;
goto error_ret;
}
@@ -1058,7 +1058,7 @@ static int ifx_spi_spi_probe(struct spi_device *spi)
&ifx_dev->rx_bus,
GFP_KERNEL);
if (!ifx_dev->rx_buffer) {
- dev_err(&spi->dev, "DMA-RX buffer allocation failed");
+ dev_err(dev, "DMA-RX buffer allocation failed");
ret = -ENOMEM;
goto error_ret;
}
@@ -1075,122 +1075,83 @@ static int ifx_spi_spi_probe(struct spi_device *spi)
/* create our tty port */
ret = ifx_spi_create_port(ifx_dev);
if (ret != 0) {
- dev_err(&spi->dev, "create default tty port failed");
+ dev_err(dev, "create default tty port failed");
goto error_ret;
}
- ifx_dev->gpio.reset = pl_data->rst_pmu;
- ifx_dev->gpio.po = pl_data->pwr_on;
- ifx_dev->gpio.mrdy = pl_data->mrdy;
- ifx_dev->gpio.srdy = pl_data->srdy;
- ifx_dev->gpio.reset_out = pl_data->rst_out;
-
- dev_info(&spi->dev, "gpios %d, %d, %d, %d, %d",
- ifx_dev->gpio.reset, ifx_dev->gpio.po, ifx_dev->gpio.mrdy,
- ifx_dev->gpio.srdy, ifx_dev->gpio.reset_out);
-
- /* Configure gpios */
- ret = gpio_request(ifx_dev->gpio.reset, "ifxModem");
- if (ret < 0) {
- dev_err(&spi->dev, "Unable to allocate GPIO%d (RESET)",
- ifx_dev->gpio.reset);
+ ifx_dev->gpio.reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
+ if (IS_ERR(ifx_dev->gpio.reset)) {
+ dev_err(dev, "could not obtain reset GPIO\n");
+ ret = PTR_ERR(ifx_dev->gpio.reset);
goto error_ret;
}
- ret += gpio_direction_output(ifx_dev->gpio.reset, 0);
- ret += gpio_export(ifx_dev->gpio.reset, 1);
- if (ret) {
- dev_err(&spi->dev, "Unable to configure GPIO%d (RESET)",
- ifx_dev->gpio.reset);
- ret = -EBUSY;
- goto error_ret2;
- }
-
- ret = gpio_request(ifx_dev->gpio.po, "ifxModem");
- ret += gpio_direction_output(ifx_dev->gpio.po, 0);
- ret += gpio_export(ifx_dev->gpio.po, 1);
- if (ret) {
- dev_err(&spi->dev, "Unable to configure GPIO%d (ON)",
- ifx_dev->gpio.po);
- ret = -EBUSY;
- goto error_ret3;
- }
-
- ret = gpio_request(ifx_dev->gpio.mrdy, "ifxModem");
- if (ret < 0) {
- dev_err(&spi->dev, "Unable to allocate GPIO%d (MRDY)",
- ifx_dev->gpio.mrdy);
- goto error_ret3;
- }
- ret += gpio_export(ifx_dev->gpio.mrdy, 1);
- ret += gpio_direction_output(ifx_dev->gpio.mrdy, 0);
- if (ret) {
- dev_err(&spi->dev, "Unable to configure GPIO%d (MRDY)",
- ifx_dev->gpio.mrdy);
- ret = -EBUSY;
- goto error_ret4;
+ gpiod_set_consumer_name(ifx_dev->gpio.reset, "ifxModem reset");
+ ifx_dev->gpio.po = devm_gpiod_get(dev, "power", GPIOD_OUT_LOW);
+ if (IS_ERR(ifx_dev->gpio.po)) {
+ dev_err(dev, "could not obtain power GPIO\n");
+ ret = PTR_ERR(ifx_dev->gpio.po);
+ goto error_ret;
}
-
- ret = gpio_request(ifx_dev->gpio.srdy, "ifxModem");
- if (ret < 0) {
- dev_err(&spi->dev, "Unable to allocate GPIO%d (SRDY)",
- ifx_dev->gpio.srdy);
- ret = -EBUSY;
- goto error_ret4;
+ gpiod_set_consumer_name(ifx_dev->gpio.po, "ifxModem power");
+ ifx_dev->gpio.mrdy = devm_gpiod_get(dev, "mrdy", GPIOD_OUT_LOW);
+ if (IS_ERR(ifx_dev->gpio.mrdy)) {
+ dev_err(dev, "could not obtain mrdy GPIO\n");
+ ret = PTR_ERR(ifx_dev->gpio.mrdy);
+ goto error_ret;
}
- ret += gpio_export(ifx_dev->gpio.srdy, 1);
- ret += gpio_direction_input(ifx_dev->gpio.srdy);
- if (ret) {
- dev_err(&spi->dev, "Unable to configure GPIO%d (SRDY)",
- ifx_dev->gpio.srdy);
- ret = -EBUSY;
- goto error_ret5;
+ gpiod_set_consumer_name(ifx_dev->gpio.mrdy, "ifxModem mrdy");
+ ifx_dev->gpio.srdy = devm_gpiod_get(dev, "srdy", GPIOD_IN);
+ if (IS_ERR(ifx_dev->gpio.srdy)) {
+ dev_err(dev, "could not obtain srdy GPIO\n");
+ ret = PTR_ERR(ifx_dev->gpio.srdy);
+ goto error_ret;
}
-
- ret = gpio_request(ifx_dev->gpio.reset_out, "ifxModem");
- if (ret < 0) {
- dev_err(&spi->dev, "Unable to allocate GPIO%d (RESET_OUT)",
- ifx_dev->gpio.reset_out);
- goto error_ret5;
+ gpiod_set_consumer_name(ifx_dev->gpio.srdy, "ifxModem srdy");
+ ifx_dev->gpio.reset_out = devm_gpiod_get(dev, "rst_out", GPIOD_IN);
+ if (IS_ERR(ifx_dev->gpio.reset_out)) {
+ dev_err(dev, "could not obtain rst_out GPIO\n");
+ ret = PTR_ERR(ifx_dev->gpio.reset_out);
+ goto error_ret;
}
- ret += gpio_export(ifx_dev->gpio.reset_out, 1);
- ret += gpio_direction_input(ifx_dev->gpio.reset_out);
- if (ret) {
- dev_err(&spi->dev, "Unable to configure GPIO%d (RESET_OUT)",
- ifx_dev->gpio.reset_out);
- ret = -EBUSY;
- goto error_ret6;
+ gpiod_set_consumer_name(ifx_dev->gpio.reset_out, "ifxModem reset out");
+ ifx_dev->gpio.pmu_reset = devm_gpiod_get(dev, "pmu_reset", GPIOD_ASIS);
+ if (IS_ERR(ifx_dev->gpio.pmu_reset)) {
+ dev_err(dev, "could not obtain pmu_reset GPIO\n");
+ ret = PTR_ERR(ifx_dev->gpio.pmu_reset);
+ goto error_ret;
}
+ gpiod_set_consumer_name(ifx_dev->gpio.pmu_reset, "ifxModem PMU reset");
- ret = request_irq(gpio_to_irq(ifx_dev->gpio.reset_out),
+ ret = request_irq(gpiod_to_irq(ifx_dev->gpio.reset_out),
ifx_spi_reset_interrupt,
IRQF_TRIGGER_RISING|IRQF_TRIGGER_FALLING, DRVNAME,
ifx_dev);
if (ret) {
- dev_err(&spi->dev, "Unable to get irq %x\n",
- gpio_to_irq(ifx_dev->gpio.reset_out));
- goto error_ret6;
+ dev_err(dev, "Unable to get irq %x\n",
+ gpiod_to_irq(ifx_dev->gpio.reset_out));
+ goto error_ret;
}
ret = ifx_spi_reset(ifx_dev);
- ret = request_irq(gpio_to_irq(ifx_dev->gpio.srdy),
+ ret = request_irq(gpiod_to_irq(ifx_dev->gpio.srdy),
ifx_spi_srdy_interrupt, IRQF_TRIGGER_RISING, DRVNAME,
ifx_dev);
if (ret) {
- dev_err(&spi->dev, "Unable to get irq %x",
- gpio_to_irq(ifx_dev->gpio.srdy));
- goto error_ret7;
+ dev_err(dev, "Unable to get irq %x",
+ gpiod_to_irq(ifx_dev->gpio.srdy));
+ goto error_ret2;
}
/* set pm runtime power state and register with power system */
- pm_runtime_set_active(&spi->dev);
- pm_runtime_enable(&spi->dev);
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
/* handle case that modem is already signaling SRDY */
/* no outgoing tty open at this point, this just satisfies the
* modem's read and should reset communication properly
*/
- srdy = gpio_get_value(ifx_dev->gpio.srdy);
+ srdy = gpiod_get_value(ifx_dev->gpio.srdy);
if (srdy) {
mrdy_assert(ifx_dev);
@@ -1199,18 +1160,8 @@ static int ifx_spi_spi_probe(struct spi_device *spi)
mrdy_set_low(ifx_dev);
return 0;
-error_ret7:
- free_irq(gpio_to_irq(ifx_dev->gpio.reset_out), ifx_dev);
-error_ret6:
- gpio_free(ifx_dev->gpio.srdy);
-error_ret5:
- gpio_free(ifx_dev->gpio.mrdy);
-error_ret4:
- gpio_free(ifx_dev->gpio.reset);
-error_ret3:
- gpio_free(ifx_dev->gpio.po);
error_ret2:
- gpio_free(ifx_dev->gpio.reset_out);
+ free_irq(gpiod_to_irq(ifx_dev->gpio.reset_out), ifx_dev);
error_ret:
ifx_spi_free_device(ifx_dev);
saved_ifx_dev = NULL;
@@ -1234,14 +1185,8 @@ static int ifx_spi_spi_remove(struct spi_device *spi)
pm_runtime_disable(&spi->dev);
/* free irq */
- free_irq(gpio_to_irq(ifx_dev->gpio.reset_out), ifx_dev);
- free_irq(gpio_to_irq(ifx_dev->gpio.srdy), ifx_dev);
-
- gpio_free(ifx_dev->gpio.srdy);
- gpio_free(ifx_dev->gpio.mrdy);
- gpio_free(ifx_dev->gpio.reset);
- gpio_free(ifx_dev->gpio.po);
- gpio_free(ifx_dev->gpio.reset_out);
+ free_irq(gpiod_to_irq(ifx_dev->gpio.reset_out), ifx_dev);
+ free_irq(gpiod_to_irq(ifx_dev->gpio.srdy), ifx_dev);
/* free allocations */
ifx_spi_free_device(ifx_dev);
diff --git a/drivers/tty/serial/ifx6x60.h b/drivers/tty/serial/ifx6x60.h
index c5a2514212ff..ecb841d928a7 100644
--- a/drivers/tty/serial/ifx6x60.h
+++ b/drivers/tty/serial/ifx6x60.h
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0
+/* SPDX-License-Identifier: GPL-2.0 */
/****************************************************************************
*
* Driver for the IFX spi modem.
@@ -10,6 +10,8 @@
#ifndef _IFX6X60_H
#define _IFX6X60_H
+struct gpio_desc;
+
#define DRVNAME "ifx6x60"
#define TTYNAME "ttyIFX"
@@ -94,11 +96,12 @@ struct ifx_spi_device {
struct {
/* gpio lines */
- unsigned short srdy; /* slave-ready gpio */
- unsigned short mrdy; /* master-ready gpio */
- unsigned short reset; /* modem-reset gpio */
- unsigned short po; /* modem-on gpio */
- unsigned short reset_out; /* modem-in-reset gpio */
+ struct gpio_desc *srdy; /* slave-ready gpio */
+ struct gpio_desc *mrdy; /* master-ready gpio */
+ struct gpio_desc *reset; /* modem-reset gpio */
+ struct gpio_desc *po; /* modem-on gpio */
+ struct gpio_desc *reset_out; /* modem-in-reset gpio */
+ struct gpio_desc *pmu_reset; /* PMU reset gpio */
/* state/stats */
int unack_srdy_int_nb;
} gpio;
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index d337782b3648..f4d68109bc8b 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -195,6 +195,8 @@ struct imx_port {
unsigned int have_rtscts:1;
unsigned int have_rtsgpio:1;
unsigned int dte_mode:1;
+ unsigned int inverted_tx:1;
+ unsigned int inverted_rx:1;
struct clk *clk_ipg;
struct clk *clk_per;
const struct imx_uart_data *devdata;
@@ -1335,7 +1337,7 @@ static int imx_uart_startup(struct uart_port *port)
int retval, i;
unsigned long flags;
int dma_is_inited = 0;
- u32 ucr1, ucr2, ucr4;
+ u32 ucr1, ucr2, ucr3, ucr4;
retval = clk_prepare_enable(sport->clk_per);
if (retval)
@@ -1387,11 +1389,29 @@ static int imx_uart_startup(struct uart_port *port)
imx_uart_writel(sport, ucr1, UCR1);
- ucr4 = imx_uart_readl(sport, UCR4) & ~UCR4_OREN;
+ ucr4 = imx_uart_readl(sport, UCR4) & ~(UCR4_OREN | UCR4_INVR);
if (!sport->dma_is_enabled)
ucr4 |= UCR4_OREN;
+ if (sport->inverted_rx)
+ ucr4 |= UCR4_INVR;
imx_uart_writel(sport, ucr4, UCR4);
+ ucr3 = imx_uart_readl(sport, UCR3) & ~UCR3_INVT;
+ /*
+ * configure tx polarity before enabling tx
+ */
+ if (sport->inverted_tx)
+ ucr3 |= UCR3_INVT;
+
+ if (!imx_uart_is_imx1(sport)) {
+ ucr3 |= UCR3_DTRDEN | UCR3_RI | UCR3_DCD;
+
+ if (sport->dte_mode)
+ /* disable broken interrupts */
+ ucr3 &= ~(UCR3_RI | UCR3_DCD);
+ }
+ imx_uart_writel(sport, ucr3, UCR3);
+
ucr2 = imx_uart_readl(sport, UCR2) & ~UCR2_ATEN;
ucr2 |= (UCR2_RXEN | UCR2_TXEN);
if (!sport->have_rtscts)
@@ -1404,20 +1424,6 @@ static int imx_uart_startup(struct uart_port *port)
ucr2 &= ~UCR2_RTSEN;
imx_uart_writel(sport, ucr2, UCR2);
- if (!imx_uart_is_imx1(sport)) {
- u32 ucr3;
-
- ucr3 = imx_uart_readl(sport, UCR3);
-
- ucr3 |= UCR3_DTRDEN | UCR3_RI | UCR3_DCD;
-
- if (sport->dte_mode)
- /* disable broken interrupts */
- ucr3 &= ~(UCR3_RI | UCR3_DCD);
-
- imx_uart_writel(sport, ucr3, UCR3);
- }
-
/*
* Enable modem status interrupts
*/
@@ -2184,6 +2190,12 @@ static int imx_uart_probe_dt(struct imx_port *sport,
if (of_get_property(np, "rts-gpios", NULL))
sport->have_rtsgpio = 1;
+ if (of_get_property(np, "fsl,inverted-tx", NULL))
+ sport->inverted_tx = 1;
+
+ if (of_get_property(np, "fsl,inverted-rx", NULL))
+ sport->inverted_rx = 1;
+
return 0;
}
#else
diff --git a/drivers/tty/serial/jsm/jsm.h b/drivers/tty/serial/jsm/jsm.h
index 7a128aaa3a66..8489c07f4cd5 100644
--- a/drivers/tty/serial/jsm/jsm.h
+++ b/drivers/tty/serial/jsm/jsm.h
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0+
+/* SPDX-License-Identifier: GPL-2.0+ */
/************************************************************************
* Copyright 2003 Digi International (www.digi.com)
*
diff --git a/drivers/tty/serial/kgdboc.c b/drivers/tty/serial/kgdboc.c
index c7d51b51898f..c9f94fa82be4 100644
--- a/drivers/tty/serial/kgdboc.c
+++ b/drivers/tty/serial/kgdboc.c
@@ -169,15 +169,13 @@ static int configure_kgdboc(void)
if (!p)
goto noconfig;
- cons = console_drivers;
- while (cons) {
+ for_each_console(cons) {
int idx;
if (cons->device && cons->device(cons, &idx) == p &&
idx == tty_line) {
kgdboc_io_ops.is_console = 1;
break;
}
- cons = cons->next;
}
kgdb_tty_driver = p;
diff --git a/drivers/tty/serial/lantiq.c b/drivers/tty/serial/lantiq.c
index f67226df30d4..c5e46ff972e4 100644
--- a/drivers/tty/serial/lantiq.c
+++ b/drivers/tty/serial/lantiq.c
@@ -11,7 +11,6 @@
#include <linux/clk.h>
#include <linux/console.h>
#include <linux/device.h>
-#include <linux/gpio.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/ioport.h>
diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index e0b720ac754b..f7d6b3c9ea45 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -37,8 +37,6 @@
#include <linux/of_gpio.h>
#include <linux/platform_data/serial-omap.h>
-#include <dt-bindings/gpio/gpio.h>
-
#define OMAP_MAX_HSUART_PORTS 10
#define UART_BUILD_REVISION(x, y) (((x) << 8) | (y))
diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c
index 0a96217dba67..40fa7a27722d 100644
--- a/drivers/tty/serial/pch_uart.c
+++ b/drivers/tty/serial/pch_uart.c
@@ -310,32 +310,32 @@ static ssize_t port_show_regs(struct file *file, char __user *user_buf,
if (!buf)
return 0;
- len += snprintf(buf + len, PCH_REGS_BUFSIZE - len,
+ len += scnprintf(buf + len, PCH_REGS_BUFSIZE - len,
"PCH EG20T port[%d] regs:\n", priv->port.line);
- len += snprintf(buf + len, PCH_REGS_BUFSIZE - len,
+ len += scnprintf(buf + len, PCH_REGS_BUFSIZE - len,
"=================================\n");
- len += snprintf(buf + len, PCH_REGS_BUFSIZE - len,
+ len += scnprintf(buf + len, PCH_REGS_BUFSIZE - len,
"IER: \t0x%02x\n", ioread8(priv->membase + UART_IER));
- len += snprintf(buf + len, PCH_REGS_BUFSIZE - len,
+ len += scnprintf(buf + len, PCH_REGS_BUFSIZE - len,
"IIR: \t0x%02x\n", ioread8(priv->membase + UART_IIR));
- len += snprintf(buf + len, PCH_REGS_BUFSIZE - len,
+ len += scnprintf(buf + len, PCH_REGS_BUFSIZE - len,
"LCR: \t0x%02x\n", ioread8(priv->membase + UART_LCR));
- len += snprintf(buf + len, PCH_REGS_BUFSIZE - len,
+ len += scnprintf(buf + len, PCH_REGS_BUFSIZE - len,
"MCR: \t0x%02x\n", ioread8(priv->membase + UART_MCR));
- len += snprintf(buf + len, PCH_REGS_BUFSIZE - len,
+ len += scnprintf(buf + len, PCH_REGS_BUFSIZE - len,
"LSR: \t0x%02x\n", ioread8(priv->membase + UART_LSR));
- len += snprintf(buf + len, PCH_REGS_BUFSIZE - len,
+ len += scnprintf(buf + len, PCH_REGS_BUFSIZE - len,
"MSR: \t0x%02x\n", ioread8(priv->membase + UART_MSR));
- len += snprintf(buf + len, PCH_REGS_BUFSIZE - len,
+ len += scnprintf(buf + len, PCH_REGS_BUFSIZE - len,
"BRCSR: \t0x%02x\n",
ioread8(priv->membase + PCH_UART_BRCSR));
lcr = ioread8(priv->membase + UART_LCR);
iowrite8(PCH_UART_LCR_DLAB, priv->membase + UART_LCR);
- len += snprintf(buf + len, PCH_REGS_BUFSIZE - len,
+ len += scnprintf(buf + len, PCH_REGS_BUFSIZE - len,
"DLL: \t0x%02x\n", ioread8(priv->membase + UART_DLL));
- len += snprintf(buf + len, PCH_REGS_BUFSIZE - len,
+ len += scnprintf(buf + len, PCH_REGS_BUFSIZE - len,
"DLM: \t0x%02x\n", ioread8(priv->membase + UART_DLM));
iowrite8(lcr, priv->membase + UART_LCR);
diff --git a/drivers/tty/serial/pic32_uart.c b/drivers/tty/serial/pic32_uart.c
index 484b7e8d5381..0a12fb11e698 100644
--- a/drivers/tty/serial/pic32_uart.c
+++ b/drivers/tty/serial/pic32_uart.c
@@ -768,11 +768,6 @@ static int __init pic32_console_init(void)
}
console_initcall(pic32_console_init);
-static inline bool is_pic32_console_port(struct uart_port *port)
-{
- return port->cons && port->cons->index == port->line;
-}
-
/*
* Late console initialization.
*/
@@ -873,8 +868,7 @@ static int pic32_uart_probe(struct platform_device *pdev)
}
#ifdef CONFIG_SERIAL_PIC32_CONSOLE
- if (is_pic32_console_port(port) &&
- (pic32_console.flags & CON_ENABLED)) {
+ if (uart_console(port) && (pic32_console.flags & CON_ENABLED)) {
/* The peripheral clock has been enabled by console_setup,
* so disable it till the port is used.
*/
diff --git a/drivers/tty/serial/pic32_uart.h b/drivers/tty/serial/pic32_uart.h
index 2f2b56927dc6..b15639cc336b 100644
--- a/drivers/tty/serial/pic32_uart.h
+++ b/drivers/tty/serial/pic32_uart.h
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0+
+/* SPDX-License-Identifier: GPL-2.0+ */
/*
* PIC32 Integrated Serial Driver.
*
diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index 0bd1684cabb3..6119090ce045 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -21,6 +21,7 @@
/* UART specific GENI registers */
#define SE_UART_LOOPBACK_CFG 0x22c
+#define SE_UART_IO_MACRO_CTRL 0x240
#define SE_UART_TX_TRANS_CFG 0x25c
#define SE_UART_TX_WORD_LEN 0x268
#define SE_UART_TX_STOP_BIT_LEN 0x26c
@@ -95,6 +96,12 @@
#define CTS_RTS_SORTED BIT(1)
#define RX_TX_CTS_RTS_SORTED (RX_TX_SORTED | CTS_RTS_SORTED)
+/* UART pin swap value */
+#define DEFAULT_IO_MACRO_IO0_IO1_MASK GENMASK(3, 0)
+#define IO_MACRO_IO0_SEL 0x3
+#define DEFAULT_IO_MACRO_IO2_IO3_MASK GENMASK(15, 4)
+#define IO_MACRO_IO2_IO3_SWAP 0x4640
+
#ifdef CONFIG_CONSOLE_POLL
#define CONSOLE_RX_BYTES_PW 1
#else
@@ -113,12 +120,14 @@ struct qcom_geni_serial_port {
unsigned int baud;
unsigned int tx_bytes_pw;
unsigned int rx_bytes_pw;
- u32 *rx_fifo;
+ void *rx_fifo;
u32 loopback;
bool brk;
unsigned int tx_remaining;
int wakeup_irq;
+ bool rx_tx_swap;
+ bool cts_rts_swap;
};
static const struct uart_ops qcom_geni_console_pops;
@@ -505,7 +514,6 @@ static int handle_rx_console(struct uart_port *uport, u32 bytes, bool drop)
static int handle_rx_uart(struct uart_port *uport, u32 bytes, bool drop)
{
- unsigned char *buf;
struct tty_port *tport;
struct qcom_geni_serial_port *port = to_dev_port(uport, uport);
u32 num_bytes_pw = port->tx_fifo_width / BITS_PER_BYTE;
@@ -517,8 +525,7 @@ static int handle_rx_uart(struct uart_port *uport, u32 bytes, bool drop)
if (drop)
return 0;
- buf = (unsigned char *)port->rx_fifo;
- ret = tty_insert_flip_string(tport, buf, bytes);
+ ret = tty_insert_flip_string(tport, port->rx_fifo, bytes);
if (ret != bytes) {
dev_err(uport->dev, "%s:Unable to push data ret %d_bytes %d\n",
__func__, ret, bytes);
@@ -818,17 +825,7 @@ static void get_tx_fifo_size(struct qcom_geni_serial_port *port)
static void qcom_geni_serial_shutdown(struct uart_port *uport)
{
- unsigned long flags;
-
- /* Stop the console before stopping the current tx */
- if (uart_console(uport))
- console_stop(uport->cons);
-
disable_irq(uport->irq);
- spin_lock_irqsave(&uport->lock, flags);
- qcom_geni_serial_stop_tx(uport);
- qcom_geni_serial_stop_rx(uport);
- spin_unlock_irqrestore(&uport->lock, flags);
}
static int qcom_geni_serial_port_setup(struct uart_port *uport)
@@ -836,6 +833,7 @@ static int qcom_geni_serial_port_setup(struct uart_port *uport)
struct qcom_geni_serial_port *port = to_dev_port(uport, uport);
u32 rxstale = DEFAULT_BITS_PER_CHAR * STALE_TIMEOUT;
u32 proto;
+ u32 pin_swap;
if (uart_console(uport)) {
port->tx_bytes_pw = 1;
@@ -856,6 +854,20 @@ static int qcom_geni_serial_port_setup(struct uart_port *uport)
get_tx_fifo_size(port);
writel(rxstale, uport->membase + SE_UART_RX_STALE_CNT);
+
+ pin_swap = readl(uport->membase + SE_UART_IO_MACRO_CTRL);
+ if (port->rx_tx_swap) {
+ pin_swap &= ~DEFAULT_IO_MACRO_IO2_IO3_MASK;
+ pin_swap |= IO_MACRO_IO2_IO3_SWAP;
+ }
+ if (port->cts_rts_swap) {
+ pin_swap &= ~DEFAULT_IO_MACRO_IO0_IO1_MASK;
+ pin_swap |= IO_MACRO_IO0_SEL;
+ }
+ /* Configure this register if RX-TX, CTS-RTS pins are swapped */
+ if (port->rx_tx_swap || port->cts_rts_swap)
+ writel(pin_swap, uport->membase + SE_UART_IO_MACRO_CTRL);
+
/*
* Make an unconditional cancel on the main sequencer to reset
* it else we could end up in data loss scenarios.
@@ -868,12 +880,6 @@ static int qcom_geni_serial_port_setup(struct uart_port *uport)
false, false, true);
geni_se_init(&port->se, UART_RX_WM, port->rx_fifo_depth - 2);
geni_se_select_mode(&port->se, GENI_SE_FIFO);
- if (!uart_console(uport)) {
- port->rx_fifo = devm_kcalloc(uport->dev,
- port->rx_fifo_depth, sizeof(u32), GFP_KERNEL);
- if (!port->rx_fifo)
- return -ENOMEM;
- }
port->setup = true;
return 0;
@@ -1284,6 +1290,13 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
port->rx_fifo_depth = DEF_FIFO_DEPTH_WORDS;
port->tx_fifo_width = DEF_FIFO_WIDTH_BITS;
+ if (!console) {
+ port->rx_fifo = devm_kcalloc(uport->dev,
+ port->rx_fifo_depth, sizeof(u32), GFP_KERNEL);
+ if (!port->rx_fifo)
+ return -ENOMEM;
+ }
+
port->name = devm_kasprintf(uport->dev, GFP_KERNEL,
"qcom_geni_serial_%s%d",
uart_console(uport) ? "console" : "uart", uport->line);
@@ -1299,6 +1312,12 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
if (!console)
port->wakeup_irq = platform_get_irq_optional(pdev, 1);
+ if (of_property_read_bool(pdev->dev.of_node, "rx-tx-swap"))
+ port->rx_tx_swap = true;
+
+ if (of_property_read_bool(pdev->dev.of_node, "cts-rts-swap"))
+ port->cts_rts_swap = true;
+
uport->private_data = drv;
platform_set_drvdata(pdev, port);
port->handle_rx = console ? handle_rx_console : handle_rx_uart;
diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c
index 7d3ae31cc720..06e8071d5601 100644
--- a/drivers/tty/serial/sc16is7xx.c
+++ b/drivers/tty/serial/sc16is7xx.c
@@ -329,7 +329,7 @@ struct sc16is7xx_port {
struct task_struct *kworker_task;
struct kthread_work irq_work;
struct mutex efr_lock;
- struct sc16is7xx_one p[0];
+ struct sc16is7xx_one p[];
};
static unsigned long sc16is7xx_lines;
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 76e506ee335c..66a5e2faf57e 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -20,6 +20,7 @@
#include <linux/device.h>
#include <linux/serial.h> /* for serial_state and serial_icounter_struct */
#include <linux/serial_core.h>
+#include <linux/sysrq.h>
#include <linux/delay.h>
#include <linux/mutex.h>
#include <linux/security.h>
@@ -40,6 +41,8 @@ static struct lock_class_key port_lock_key;
#define HIGH_BITS_OFFSET ((sizeof(long)-sizeof(int))*8)
+#define SYSRQ_TIMEOUT (HZ * 5)
+
static void uart_change_speed(struct tty_struct *tty, struct uart_state *state,
struct ktermios *old_termios);
static void uart_wait_until_sent(struct tty_struct *tty, int timeout);
@@ -1908,6 +1911,24 @@ static int uart_proc_show(struct seq_file *m, void *v)
}
#endif
+static inline bool uart_console_enabled(struct uart_port *port)
+{
+ return uart_console(port) && (port->cons->flags & CON_ENABLED);
+}
+
+/*
+ * Ensure that the serial console lock is initialised early.
+ * If this port is a console, then the spinlock is already initialised.
+ */
+static inline void uart_port_spin_lock_init(struct uart_port *port)
+{
+ if (uart_console(port))
+ return;
+
+ spin_lock_init(&port->lock);
+ lockdep_set_class(&port->lock, &port_lock_key);
+}
+
#if defined(CONFIG_SERIAL_CORE_CONSOLE) || defined(CONFIG_CONSOLE_POLL)
/**
* uart_console_write - write a console message to a serial port
@@ -2060,16 +2081,7 @@ uart_set_options(struct uart_port *port, struct console *co,
struct ktermios termios;
static struct ktermios dummy;
- /*
- * Ensure that the serial console lock is initialised
- * early.
- * If this port is a console, then the spinlock is already
- * initialised.
- */
- if (!(uart_console(port) && (port->cons->flags & CON_ENABLED))) {
- spin_lock_init(&port->lock);
- lockdep_set_class(&port->lock, &port_lock_key);
- }
+ uart_port_spin_lock_init(port);
memset(&termios, 0, sizeof(struct ktermios));
@@ -2605,7 +2617,7 @@ struct tty_driver *uart_console_device(struct console *co, int *index)
}
EXPORT_SYMBOL_GPL(uart_console_device);
-static ssize_t uart_get_attr_uartclk(struct device *dev,
+static ssize_t uartclk_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct serial_struct tmp;
@@ -2615,7 +2627,7 @@ static ssize_t uart_get_attr_uartclk(struct device *dev,
return snprintf(buf, PAGE_SIZE, "%d\n", tmp.baud_base * 16);
}
-static ssize_t uart_get_attr_type(struct device *dev,
+static ssize_t type_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct serial_struct tmp;
@@ -2624,7 +2636,8 @@ static ssize_t uart_get_attr_type(struct device *dev,
uart_get_info(port, &tmp);
return snprintf(buf, PAGE_SIZE, "%d\n", tmp.type);
}
-static ssize_t uart_get_attr_line(struct device *dev,
+
+static ssize_t line_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct serial_struct tmp;
@@ -2634,7 +2647,7 @@ static ssize_t uart_get_attr_line(struct device *dev,
return snprintf(buf, PAGE_SIZE, "%d\n", tmp.line);
}
-static ssize_t uart_get_attr_port(struct device *dev,
+static ssize_t port_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct serial_struct tmp;
@@ -2648,7 +2661,7 @@ static ssize_t uart_get_attr_port(struct device *dev,
return snprintf(buf, PAGE_SIZE, "0x%lX\n", ioaddr);
}
-static ssize_t uart_get_attr_irq(struct device *dev,
+static ssize_t irq_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct serial_struct tmp;
@@ -2658,7 +2671,7 @@ static ssize_t uart_get_attr_irq(struct device *dev,
return snprintf(buf, PAGE_SIZE, "%d\n", tmp.irq);
}
-static ssize_t uart_get_attr_flags(struct device *dev,
+static ssize_t flags_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct serial_struct tmp;
@@ -2668,7 +2681,7 @@ static ssize_t uart_get_attr_flags(struct device *dev,
return snprintf(buf, PAGE_SIZE, "0x%X\n", tmp.flags);
}
-static ssize_t uart_get_attr_xmit_fifo_size(struct device *dev,
+static ssize_t xmit_fifo_size_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct serial_struct tmp;
@@ -2678,8 +2691,7 @@ static ssize_t uart_get_attr_xmit_fifo_size(struct device *dev,
return snprintf(buf, PAGE_SIZE, "%d\n", tmp.xmit_fifo_size);
}
-
-static ssize_t uart_get_attr_close_delay(struct device *dev,
+static ssize_t close_delay_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct serial_struct tmp;
@@ -2689,8 +2701,7 @@ static ssize_t uart_get_attr_close_delay(struct device *dev,
return snprintf(buf, PAGE_SIZE, "%d\n", tmp.close_delay);
}
-
-static ssize_t uart_get_attr_closing_wait(struct device *dev,
+static ssize_t closing_wait_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct serial_struct tmp;
@@ -2700,7 +2711,7 @@ static ssize_t uart_get_attr_closing_wait(struct device *dev,
return snprintf(buf, PAGE_SIZE, "%d\n", tmp.closing_wait);
}
-static ssize_t uart_get_attr_custom_divisor(struct device *dev,
+static ssize_t custom_divisor_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct serial_struct tmp;
@@ -2710,7 +2721,7 @@ static ssize_t uart_get_attr_custom_divisor(struct device *dev,
return snprintf(buf, PAGE_SIZE, "%d\n", tmp.custom_divisor);
}
-static ssize_t uart_get_attr_io_type(struct device *dev,
+static ssize_t io_type_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct serial_struct tmp;
@@ -2720,7 +2731,7 @@ static ssize_t uart_get_attr_io_type(struct device *dev,
return snprintf(buf, PAGE_SIZE, "%d\n", tmp.io_type);
}
-static ssize_t uart_get_attr_iomem_base(struct device *dev,
+static ssize_t iomem_base_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct serial_struct tmp;
@@ -2730,7 +2741,7 @@ static ssize_t uart_get_attr_iomem_base(struct device *dev,
return snprintf(buf, PAGE_SIZE, "0x%lX\n", (unsigned long)tmp.iomem_base);
}
-static ssize_t uart_get_attr_iomem_reg_shift(struct device *dev,
+static ssize_t iomem_reg_shift_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct serial_struct tmp;
@@ -2740,40 +2751,92 @@ static ssize_t uart_get_attr_iomem_reg_shift(struct device *dev,
return snprintf(buf, PAGE_SIZE, "%d\n", tmp.iomem_reg_shift);
}
-static DEVICE_ATTR(type, S_IRUSR | S_IRGRP, uart_get_attr_type, NULL);
-static DEVICE_ATTR(line, S_IRUSR | S_IRGRP, uart_get_attr_line, NULL);
-static DEVICE_ATTR(port, S_IRUSR | S_IRGRP, uart_get_attr_port, NULL);
-static DEVICE_ATTR(irq, S_IRUSR | S_IRGRP, uart_get_attr_irq, NULL);
-static DEVICE_ATTR(flags, S_IRUSR | S_IRGRP, uart_get_attr_flags, NULL);
-static DEVICE_ATTR(xmit_fifo_size, S_IRUSR | S_IRGRP, uart_get_attr_xmit_fifo_size, NULL);
-static DEVICE_ATTR(uartclk, S_IRUSR | S_IRGRP, uart_get_attr_uartclk, NULL);
-static DEVICE_ATTR(close_delay, S_IRUSR | S_IRGRP, uart_get_attr_close_delay, NULL);
-static DEVICE_ATTR(closing_wait, S_IRUSR | S_IRGRP, uart_get_attr_closing_wait, NULL);
-static DEVICE_ATTR(custom_divisor, S_IRUSR | S_IRGRP, uart_get_attr_custom_divisor, NULL);
-static DEVICE_ATTR(io_type, S_IRUSR | S_IRGRP, uart_get_attr_io_type, NULL);
-static DEVICE_ATTR(iomem_base, S_IRUSR | S_IRGRP, uart_get_attr_iomem_base, NULL);
-static DEVICE_ATTR(iomem_reg_shift, S_IRUSR | S_IRGRP, uart_get_attr_iomem_reg_shift, NULL);
+static ssize_t console_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct tty_port *port = dev_get_drvdata(dev);
+ struct uart_state *state = container_of(port, struct uart_state, port);
+ struct uart_port *uport;
+ bool console = false;
+
+ mutex_lock(&port->mutex);
+ uport = uart_port_check(state);
+ if (uport)
+ console = uart_console_enabled(uport);
+ mutex_unlock(&port->mutex);
+
+ return sprintf(buf, "%c\n", console ? 'Y' : 'N');
+}
+
+static ssize_t console_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct tty_port *port = dev_get_drvdata(dev);
+ struct uart_state *state = container_of(port, struct uart_state, port);
+ struct uart_port *uport;
+ bool oldconsole, newconsole;
+ int ret;
+
+ ret = kstrtobool(buf, &newconsole);
+ if (ret)
+ return ret;
+
+ mutex_lock(&port->mutex);
+ uport = uart_port_check(state);
+ if (uport) {
+ oldconsole = uart_console_enabled(uport);
+ if (oldconsole && !newconsole) {
+ ret = unregister_console(uport->cons);
+ } else if (!oldconsole && newconsole) {
+ if (uart_console(uport))
+ register_console(uport->cons);
+ else
+ ret = -ENOENT;
+ }
+ } else {
+ ret = -ENXIO;
+ }
+ mutex_unlock(&port->mutex);
+
+ return ret < 0 ? ret : count;
+}
+
+static DEVICE_ATTR_RO(uartclk);
+static DEVICE_ATTR_RO(type);
+static DEVICE_ATTR_RO(line);
+static DEVICE_ATTR_RO(port);
+static DEVICE_ATTR_RO(irq);
+static DEVICE_ATTR_RO(flags);
+static DEVICE_ATTR_RO(xmit_fifo_size);
+static DEVICE_ATTR_RO(close_delay);
+static DEVICE_ATTR_RO(closing_wait);
+static DEVICE_ATTR_RO(custom_divisor);
+static DEVICE_ATTR_RO(io_type);
+static DEVICE_ATTR_RO(iomem_base);
+static DEVICE_ATTR_RO(iomem_reg_shift);
+static DEVICE_ATTR_RW(console);
static struct attribute *tty_dev_attrs[] = {
+ &dev_attr_uartclk.attr,
&dev_attr_type.attr,
&dev_attr_line.attr,
&dev_attr_port.attr,
&dev_attr_irq.attr,
&dev_attr_flags.attr,
&dev_attr_xmit_fifo_size.attr,
- &dev_attr_uartclk.attr,
&dev_attr_close_delay.attr,
&dev_attr_closing_wait.attr,
&dev_attr_custom_divisor.attr,
&dev_attr_io_type.attr,
&dev_attr_iomem_base.attr,
&dev_attr_iomem_reg_shift.attr,
- NULL,
- };
+ &dev_attr_console.attr,
+ NULL
+};
static const struct attribute_group tty_dev_attr_group = {
.attrs = tty_dev_attrs,
- };
+};
/**
* uart_add_one_port - attach a driver-defined port structure
@@ -2824,14 +2887,8 @@ int uart_add_one_port(struct uart_driver *drv, struct uart_port *uport)
goto out;
}
- /*
- * If this port is a console, then the spinlock is already
- * initialised.
- */
- if (!(uart_console(uport) && (uport->cons->flags & CON_ENABLED))) {
- spin_lock_init(&uport->lock);
- lockdep_set_class(&uport->lock, &port_lock_key);
- }
+ uart_port_spin_lock_init(uport);
+
if (uport->cons && uport->dev)
of_console_check(uport->dev->of_node, uport->cons->name, uport->line);
@@ -3082,6 +3139,60 @@ void uart_insert_char(struct uart_port *port, unsigned int status,
}
EXPORT_SYMBOL_GPL(uart_insert_char);
+#ifdef CONFIG_MAGIC_SYSRQ_SERIAL
+static const char sysrq_toggle_seq[] = CONFIG_MAGIC_SYSRQ_SERIAL_SEQUENCE;
+
+static void uart_sysrq_on(struct work_struct *w)
+{
+ int sysrq_toggle_seq_len = strlen(sysrq_toggle_seq);
+
+ sysrq_toggle_support(1);
+ pr_info("SysRq is enabled by magic sequence '%*pE' on serial\n",
+ sysrq_toggle_seq_len, sysrq_toggle_seq);
+}
+static DECLARE_WORK(sysrq_enable_work, uart_sysrq_on);
+
+/**
+ * uart_try_toggle_sysrq - Enables SysRq from serial line
+ * @port: uart_port structure where char(s) after BREAK met
+ * @ch: new character in the sequence after received BREAK
+ *
+ * Enables magic SysRq when the required sequence is met on port
+ * (see CONFIG_MAGIC_SYSRQ_SERIAL_SEQUENCE).
+ *
+ * Returns false if @ch is out of enabling sequence and should be
+ * handled some other way, true if @ch was consumed.
+ */
+static bool uart_try_toggle_sysrq(struct uart_port *port, unsigned int ch)
+{
+ int sysrq_toggle_seq_len = strlen(sysrq_toggle_seq);
+
+ if (!sysrq_toggle_seq_len)
+ return false;
+
+ BUILD_BUG_ON(ARRAY_SIZE(sysrq_toggle_seq) >= U8_MAX);
+ if (sysrq_toggle_seq[port->sysrq_seq] != ch) {
+ port->sysrq_seq = 0;
+ return false;
+ }
+
+ if (++port->sysrq_seq < sysrq_toggle_seq_len) {
+ port->sysrq = jiffies + SYSRQ_TIMEOUT;
+ return true;
+ }
+
+ schedule_work(&sysrq_enable_work);
+
+ port->sysrq = 0;
+ return true;
+}
+#else
+static inline bool uart_try_toggle_sysrq(struct uart_port *port, unsigned int ch)
+{
+ return false;
+}
+#endif
+
int uart_handle_sysrq_char(struct uart_port *port, unsigned int ch)
{
if (!IS_ENABLED(CONFIG_MAGIC_SYSRQ_SERIAL))
@@ -3091,9 +3202,13 @@ int uart_handle_sysrq_char(struct uart_port *port, unsigned int ch)
return 0;
if (ch && time_before(jiffies, port->sysrq)) {
- handle_sysrq(ch);
- port->sysrq = 0;
- return 1;
+ if (sysrq_mask()) {
+ handle_sysrq(ch);
+ port->sysrq = 0;
+ return 1;
+ }
+ if (uart_try_toggle_sysrq(port, ch))
+ return 1;
}
port->sysrq = 0;
@@ -3110,9 +3225,13 @@ int uart_prepare_sysrq_char(struct uart_port *port, unsigned int ch)
return 0;
if (ch && time_before(jiffies, port->sysrq)) {
- port->sysrq_ch = ch;
- port->sysrq = 0;
- return 1;
+ if (sysrq_mask()) {
+ port->sysrq_ch = ch;
+ port->sysrq = 0;
+ return 1;
+ }
+ if (uart_try_toggle_sysrq(port, ch))
+ return 1;
}
port->sysrq = 0;
@@ -3120,22 +3239,19 @@ int uart_prepare_sysrq_char(struct uart_port *port, unsigned int ch)
}
EXPORT_SYMBOL_GPL(uart_prepare_sysrq_char);
-void uart_unlock_and_check_sysrq(struct uart_port *port, unsigned long irqflags)
+void uart_unlock_and_check_sysrq(struct uart_port *port, unsigned long flags)
+__releases(&port->lock)
{
- int sysrq_ch;
+ if (port->has_sysrq) {
+ int sysrq_ch = port->sysrq_ch;
- if (!port->has_sysrq) {
- spin_unlock_irqrestore(&port->lock, irqflags);
- return;
+ port->sysrq_ch = 0;
+ spin_unlock_irqrestore(&port->lock, flags);
+ if (sysrq_ch)
+ handle_sysrq(sysrq_ch);
+ } else {
+ spin_unlock_irqrestore(&port->lock, flags);
}
-
- sysrq_ch = port->sysrq_ch;
- port->sysrq_ch = 0;
-
- spin_unlock_irqrestore(&port->lock, irqflags);
-
- if (sysrq_ch)
- handle_sysrq(sysrq_ch);
}
EXPORT_SYMBOL_GPL(uart_unlock_and_check_sysrq);
@@ -3149,14 +3265,12 @@ int uart_handle_break(struct uart_port *port)
if (port->handle_break)
port->handle_break(port);
- if (port->has_sysrq) {
- if (port->cons && port->cons->index == port->line) {
- if (!port->sysrq) {
- port->sysrq = jiffies + HZ*5;
- return 1;
- }
- port->sysrq = 0;
+ if (port->has_sysrq && uart_console(port)) {
+ if (!port->sysrq) {
+ port->sysrq = jiffies + SYSRQ_TIMEOUT;
+ return 1;
}
+ port->sysrq = 0;
}
if (port->flags & UPF_SAK)
diff --git a/drivers/tty/serial/serial_mctrl_gpio.h b/drivers/tty/serial/serial_mctrl_gpio.h
index 1b2ff503b2c2..b134a0ffc894 100644
--- a/drivers/tty/serial/serial_mctrl_gpio.h
+++ b/drivers/tty/serial/serial_mctrl_gpio.h
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0+
+/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Helpers for controlling modem lines via GPIO
*
diff --git a/drivers/tty/serial/sifive.c b/drivers/tty/serial/sifive.c
index d5f81b98e4d7..13eadcb8aec4 100644
--- a/drivers/tty/serial/sifive.c
+++ b/drivers/tty/serial/sifive.c
@@ -618,10 +618,10 @@ static void sifive_serial_shutdown(struct uart_port *port)
*
* On the V0 SoC, the UART IP block is derived from the CPU clock source
* after a synchronous divide-by-two divider, so any CPU clock rate change
- * requires the UART baud rate to be updated. This presumably could corrupt any
- * serial word currently being transmitted or received. It would probably
- * be better to stop receives and transmits, then complete the baud rate
- * change, then re-enable them.
+ * requires the UART baud rate to be updated. This presumably corrupts any
+ * serial word currently being transmitted or received. In order to avoid
+ * corrupting the output data stream, we drain the transmit queue before
+ * allowing the clock's rate to be changed.
*/
static int sifive_serial_clk_notifier(struct notifier_block *nb,
unsigned long event, void *data)
@@ -629,6 +629,26 @@ static int sifive_serial_clk_notifier(struct notifier_block *nb,
struct clk_notifier_data *cnd = data;
struct sifive_serial_port *ssp = notifier_to_sifive_serial_port(nb);
+ if (event == PRE_RATE_CHANGE) {
+ /*
+ * The TX watermark is always set to 1 by this driver, which
+ * means that the TX busy bit will lower when there are 0 bytes
+ * left in the TX queue -- in other words, when the TX FIFO is
+ * empty.
+ */
+ __ssp_wait_for_xmitr(ssp);
+ /*
+ * On the cycle the TX FIFO goes empty there is still a full
+ * UART frame left to be transmitted in the shift register.
+ * The UART provides no way for software to directly determine
+ * when that last frame has been transmitted, so we just sleep
+ * here instead. As we're not tracking the number of stop bits
+ * they're just worst cased here. The rest of the serial
+ * framing parameters aren't configurable by software.
+ */
+ udelay(DIV_ROUND_UP(12 * 1000 * 1000, ssp->baud_rate));
+ }
+
if (event == POST_RATE_CHANGE && ssp->clkin_rate != cnd->new_rate) {
ssp->clkin_rate = cnd->new_rate;
__ssp_update_div(ssp);
@@ -709,6 +729,29 @@ static const char *sifive_serial_type(struct uart_port *port)
return port->type == PORT_SIFIVE_V0 ? "SiFive UART v0" : NULL;
}
+#ifdef CONFIG_CONSOLE_POLL
+static int sifive_serial_poll_get_char(struct uart_port *port)
+{
+ struct sifive_serial_port *ssp = port_to_sifive_serial_port(port);
+ char is_empty, ch;
+
+ ch = __ssp_receive_char(ssp, &is_empty);
+ if (is_empty)
+ return NO_POLL_CHAR;
+
+ return ch;
+}
+
+static void sifive_serial_poll_put_char(struct uart_port *port,
+ unsigned char c)
+{
+ struct sifive_serial_port *ssp = port_to_sifive_serial_port(port);
+
+ __ssp_wait_for_xmitr(ssp);
+ __ssp_transmit_char(ssp, c);
+}
+#endif /* CONFIG_CONSOLE_POLL */
+
/*
* Early console support
*/
@@ -877,6 +920,10 @@ static const struct uart_ops sifive_serial_uops = {
.request_port = sifive_serial_request_port,
.config_port = sifive_serial_config_port,
.verify_port = sifive_serial_verify_port,
+#ifdef CONFIG_CONSOLE_POLL
+ .poll_get_char = sifive_serial_poll_get_char,
+ .poll_put_char = sifive_serial_poll_put_char,
+#endif
};
static struct uart_driver sifive_serial_uart_driver = {
diff --git a/drivers/tty/serial/sirfsoc_uart.h b/drivers/tty/serial/sirfsoc_uart.h
index 637b09d3fe79..fb88ac565227 100644
--- a/drivers/tty/serial/sirfsoc_uart.h
+++ b/drivers/tty/serial/sirfsoc_uart.h
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0+
+/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Drivers for CSR SiRFprimaII onboard UARTs.
*
diff --git a/drivers/tty/serial/sprd_serial.c b/drivers/tty/serial/sprd_serial.c
index 3d3c70634589..9a7ae6384edf 100644
--- a/drivers/tty/serial/sprd_serial.c
+++ b/drivers/tty/serial/sprd_serial.c
@@ -1013,7 +1013,7 @@ static void sprd_console_write(struct console *co, const char *s,
spin_unlock_irqrestore(&port->lock, flags);
}
-static int __init sprd_console_setup(struct console *co, char *options)
+static int sprd_console_setup(struct console *co, char *options)
{
struct sprd_uart_port *sprd_uart_port;
int baud = 115200;
@@ -1102,29 +1102,6 @@ static struct uart_driver sprd_uart_driver = {
.cons = SPRD_CONSOLE,
};
-static int sprd_probe_dt_alias(int index, struct device *dev)
-{
- struct device_node *np;
- int ret = index;
-
- if (!IS_ENABLED(CONFIG_OF))
- return ret;
-
- np = dev->of_node;
- if (!np)
- return ret;
-
- ret = of_alias_get_id(np, "serial");
- if (ret < 0)
- ret = index;
- else if (ret >= ARRAY_SIZE(sprd_port) || sprd_port[ret] != NULL) {
- dev_warn(dev, "requested serial port %d not available.\n", ret);
- ret = index;
- }
-
- return ret;
-}
-
static int sprd_remove(struct platform_device *dev)
{
struct sprd_uart_port *sup = platform_get_drvdata(dev);
@@ -1132,14 +1109,13 @@ static int sprd_remove(struct platform_device *dev)
if (sup) {
uart_remove_one_port(&sprd_uart_driver, &sup->port);
sprd_port[sup->port.line] = NULL;
+ sprd_rx_free_buf(sup);
sprd_ports_num--;
}
if (!sprd_ports_num)
uart_unregister_driver(&sprd_uart_driver);
- sprd_rx_free_buf(sup);
-
return 0;
}
@@ -1147,7 +1123,8 @@ static bool sprd_uart_is_console(struct uart_port *uport)
{
struct console *cons = sprd_uart_driver.cons;
- if (cons && cons->index >= 0 && cons->index == uport->line)
+ if ((cons && cons->index >= 0 && cons->index == uport->line) ||
+ of_console_check(uport->dev->of_node, SPRD_TTY_NAME, uport->line))
return true;
return false;
@@ -1203,14 +1180,11 @@ static int sprd_probe(struct platform_device *pdev)
int index;
int ret;
- for (index = 0; index < ARRAY_SIZE(sprd_port); index++)
- if (sprd_port[index] == NULL)
- break;
-
- if (index == ARRAY_SIZE(sprd_port))
- return -EBUSY;
-
- index = sprd_probe_dt_alias(index, &pdev->dev);
+ index = of_alias_get_id(pdev->dev.of_node, "serial");
+ if (index < 0 || index >= ARRAY_SIZE(sprd_port)) {
+ dev_err(&pdev->dev, "got a wrong serial alias id %d\n", index);
+ return -EINVAL;
+ }
sprd_port[index] = devm_kzalloc(&pdev->dev, sizeof(*sprd_port[index]),
GFP_KERNEL);
@@ -1262,10 +1236,8 @@ static int sprd_probe(struct platform_device *pdev)
sprd_ports_num++;
ret = uart_add_one_port(&sprd_uart_driver, up);
- if (ret) {
- sprd_port[index] = NULL;
+ if (ret)
sprd_remove(pdev);
- }
platform_set_drvdata(pdev, up);
diff --git a/drivers/tty/serial/stm32-usart.h b/drivers/tty/serial/stm32-usart.h
index a175c1094dc8..db8bf0d4982d 100644
--- a/drivers/tty/serial/stm32-usart.h
+++ b/drivers/tty/serial/stm32-usart.h
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0
+/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) Maxime Coquelin 2015
* Copyright (C) STMicroelectronics SA 2017
diff --git a/drivers/tty/serial/timbuart.h b/drivers/tty/serial/timbuart.h
index fb00b172117d..007e59af636d 100644
--- a/drivers/tty/serial/timbuart.h
+++ b/drivers/tty/serial/timbuart.h
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0
+/* SPDX-License-Identifier: GPL-2.0 */
/*
* timbuart.c timberdale FPGA GPIO driver
* Copyright (c) 2009 Intel Corporation
diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c
index 98db9dc168ff..6b26f767768e 100644
--- a/drivers/tty/serial/xilinx_uartps.c
+++ b/drivers/tty/serial/xilinx_uartps.c
@@ -650,8 +650,8 @@ static unsigned int cdns_uart_tx_empty(struct uart_port *port)
unsigned int status;
status = readl(port->membase + CDNS_UART_SR) &
- CDNS_UART_SR_TXEMPTY;
- return status ? TIOCSER_TEMT : 0;
+ (CDNS_UART_SR_TXEMPTY | CDNS_UART_SR_TACTIVE);
+ return (status == CDNS_UART_SR_TXEMPTY) ? TIOCSER_TEMT : 0;
}
/**
@@ -693,20 +693,8 @@ static void cdns_uart_set_termios(struct uart_port *port,
u32 cval = 0;
unsigned int baud, minbaud, maxbaud;
unsigned long flags;
- unsigned int ctrl_reg, mode_reg, val;
- int err;
-
- /* Wait for the transmit FIFO to empty before making changes */
- if (!(readl(port->membase + CDNS_UART_CR) &
- CDNS_UART_CR_TX_DIS)) {
- err = readl_poll_timeout(port->membase + CDNS_UART_SR,
- val, (val & CDNS_UART_SR_TXEMPTY),
- 1000, TX_TIMEOUT);
- if (err) {
- dev_err(port->dev, "timed out waiting for tx empty");
- return;
- }
- }
+ unsigned int ctrl_reg, mode_reg;
+
spin_lock_irqsave(&port->lock, flags);
/* Disable the TX and RX to set baud rate */
diff --git a/drivers/tty/sysrq.c b/drivers/tty/sysrq.c
index f724962a5906..5e0d0813da55 100644
--- a/drivers/tty/sysrq.c
+++ b/drivers/tty/sysrq.c
@@ -63,6 +63,18 @@ static bool sysrq_on(void)
return sysrq_enabled || sysrq_always_enabled;
}
+/**
+ * sysrq_mask - Getter for sysrq_enabled mask.
+ *
+ * Return: 1 if sysrq is always enabled, enabled sysrq_key_op mask otherwise.
+ */
+int sysrq_mask(void)
+{
+ if (sysrq_always_enabled)
+ return 1;
+ return sysrq_enabled;
+}
+
/*
* A value of 1 means 'all', other nonzero values are an op mask:
*/
diff --git a/drivers/tty/vt/selection.c b/drivers/tty/vt/selection.c
index d7d2e4b844bc..d54a549c5892 100644
--- a/drivers/tty/vt/selection.c
+++ b/drivers/tty/vt/selection.c
@@ -35,18 +35,18 @@
/* Don't take this from <ctype.h>: 011-015 on the screen aren't spaces */
#define isspace(c) ((c) == ' ')
-extern void poke_blanked_console(void);
-
/* FIXME: all this needs locking */
-/* Variables for selection control. */
-/* Use a dynamic buffer, instead of static (Dec 1994) */
-struct vc_data *sel_cons; /* must not be deallocated */
-static int use_unicode;
-static volatile int sel_start = -1; /* cleared by clear_selection */
-static int sel_end;
-static int sel_buffer_lth;
-static char *sel_buffer;
-static DEFINE_MUTEX(sel_lock);
+static struct vc_selection {
+ struct mutex lock;
+ struct vc_data *cons; /* must not be deallocated */
+ char *buffer;
+ unsigned int buf_len;
+ volatile int start; /* cleared by clear_selection */
+ int end;
+} vc_sel = {
+ .lock = __MUTEX_INITIALIZER(vc_sel.lock),
+ .start = -1,
+};
/* clear_selection, highlight and highlight_pointer can be called
from interrupt (via scrollback/front) */
@@ -54,22 +54,21 @@ static DEFINE_MUTEX(sel_lock);
/* set reverse video on characters s-e of console with selection. */
static inline void highlight(const int s, const int e)
{
- invert_screen(sel_cons, s, e-s+2, 1);
+ invert_screen(vc_sel.cons, s, e-s+2, 1);
}
/* use complementary color to show the pointer */
static inline void highlight_pointer(const int where)
{
- complement_pos(sel_cons, where);
+ complement_pos(vc_sel.cons, where);
}
static u32
-sel_pos(int n)
+sel_pos(int n, bool unicode)
{
- if (use_unicode)
- return screen_glyph_unicode(sel_cons, n / 2);
- return inverse_translate(sel_cons, screen_glyph(sel_cons, n),
- 0);
+ if (unicode)
+ return screen_glyph_unicode(vc_sel.cons, n / 2);
+ return inverse_translate(vc_sel.cons, screen_glyph(vc_sel.cons, n), 0);
}
/**
@@ -81,13 +80,18 @@ sel_pos(int n)
void clear_selection(void)
{
highlight_pointer(-1); /* hide the pointer */
- if (sel_start != -1) {
- highlight(sel_start, sel_end);
- sel_start = -1;
+ if (vc_sel.start != -1) {
+ highlight(vc_sel.start, vc_sel.end);
+ vc_sel.start = -1;
}
}
EXPORT_SYMBOL_GPL(clear_selection);
+bool vc_is_sel(struct vc_data *vc)
+{
+ return vc == vc_sel.cons;
+}
+
/*
* User settable table: what characters are to be considered alphabetic?
* 128 bits. Locked by the console lock.
@@ -186,9 +190,10 @@ static int __set_selection_kernel(struct tiocl_selection *v, struct tty_struct *
struct vc_data *vc = vc_cons[fg_console].d;
int new_sel_start, new_sel_end, spc;
char *bp, *obp;
- int i, ps, pe, multiplier;
+ int i, ps, pe;
u32 c;
- int mode, ret = 0;
+ int ret = 0;
+ bool unicode;
poke_blanked_console();
@@ -211,57 +216,51 @@ static int __set_selection_kernel(struct tiocl_selection *v, struct tty_struct *
return 0;
}
- if (ps > pe) /* make sel_start <= sel_end */
+ if (ps > pe) /* make vc_sel.start <= vc_sel.end */
swap(ps, pe);
- if (sel_cons != vc_cons[fg_console].d) {
+ if (vc_sel.cons != vc_cons[fg_console].d) {
clear_selection();
- sel_cons = vc_cons[fg_console].d;
+ vc_sel.cons = vc_cons[fg_console].d;
}
- mode = vt_do_kdgkbmode(fg_console);
- if (mode == K_UNICODE)
- use_unicode = 1;
- else
- use_unicode = 0;
-
- switch (v->sel_mode)
- {
- case TIOCL_SELCHAR: /* character-by-character selection */
+ unicode = vt_do_kdgkbmode(fg_console) == K_UNICODE;
+
+ switch (v->sel_mode) {
+ case TIOCL_SELCHAR: /* character-by-character selection */
+ new_sel_start = ps;
+ new_sel_end = pe;
+ break;
+ case TIOCL_SELWORD: /* word-by-word selection */
+ spc = isspace(sel_pos(ps, unicode));
+ for (new_sel_start = ps; ; ps -= 2) {
+ if ((spc && !isspace(sel_pos(ps, unicode))) ||
+ (!spc && !inword(sel_pos(ps, unicode))))
+ break;
new_sel_start = ps;
+ if (!(ps % vc->vc_size_row))
+ break;
+ }
+
+ spc = isspace(sel_pos(pe, unicode));
+ for (new_sel_end = pe; ; pe += 2) {
+ if ((spc && !isspace(sel_pos(pe, unicode))) ||
+ (!spc && !inword(sel_pos(pe, unicode))))
+ break;
new_sel_end = pe;
- break;
- case TIOCL_SELWORD: /* word-by-word selection */
- spc = isspace(sel_pos(ps));
- for (new_sel_start = ps; ; ps -= 2)
- {
- if ((spc && !isspace(sel_pos(ps))) ||
- (!spc && !inword(sel_pos(ps))))
- break;
- new_sel_start = ps;
- if (!(ps % vc->vc_size_row))
- break;
- }
- spc = isspace(sel_pos(pe));
- for (new_sel_end = pe; ; pe += 2)
- {
- if ((spc && !isspace(sel_pos(pe))) ||
- (!spc && !inword(sel_pos(pe))))
- break;
- new_sel_end = pe;
- if (!((pe + 2) % vc->vc_size_row))
- break;
- }
- break;
- case TIOCL_SELLINE: /* line-by-line selection */
- new_sel_start = ps - ps % vc->vc_size_row;
- new_sel_end = pe + vc->vc_size_row
- - pe % vc->vc_size_row - 2;
- break;
- case TIOCL_SELPOINTER:
- highlight_pointer(pe);
- return 0;
- default:
- return -EINVAL;
+ if (!((pe + 2) % vc->vc_size_row))
+ break;
+ }
+ break;
+ case TIOCL_SELLINE: /* line-by-line selection */
+ new_sel_start = rounddown(ps, vc->vc_size_row);
+ new_sel_end = rounddown(pe, vc->vc_size_row) +
+ vc->vc_size_row - 2;
+ break;
+ case TIOCL_SELPOINTER:
+ highlight_pointer(pe);
+ return 0;
+ default:
+ return -EINVAL;
}
/* remove the pointer */
@@ -270,56 +269,56 @@ static int __set_selection_kernel(struct tiocl_selection *v, struct tty_struct *
/* select to end of line if on trailing space */
if (new_sel_end > new_sel_start &&
!atedge(new_sel_end, vc->vc_size_row) &&
- isspace(sel_pos(new_sel_end))) {
+ isspace(sel_pos(new_sel_end, unicode))) {
for (pe = new_sel_end + 2; ; pe += 2)
- if (!isspace(sel_pos(pe)) ||
+ if (!isspace(sel_pos(pe, unicode)) ||
atedge(pe, vc->vc_size_row))
break;
- if (isspace(sel_pos(pe)))
+ if (isspace(sel_pos(pe, unicode)))
new_sel_end = pe;
}
- if (sel_start == -1) /* no current selection */
+ if (vc_sel.start == -1) /* no current selection */
highlight(new_sel_start, new_sel_end);
- else if (new_sel_start == sel_start)
+ else if (new_sel_start == vc_sel.start)
{
- if (new_sel_end == sel_end) /* no action required */
+ if (new_sel_end == vc_sel.end) /* no action required */
return 0;
- else if (new_sel_end > sel_end) /* extend to right */
- highlight(sel_end + 2, new_sel_end);
+ else if (new_sel_end > vc_sel.end) /* extend to right */
+ highlight(vc_sel.end + 2, new_sel_end);
else /* contract from right */
- highlight(new_sel_end + 2, sel_end);
+ highlight(new_sel_end + 2, vc_sel.end);
}
- else if (new_sel_end == sel_end)
+ else if (new_sel_end == vc_sel.end)
{
- if (new_sel_start < sel_start) /* extend to left */
- highlight(new_sel_start, sel_start - 2);
+ if (new_sel_start < vc_sel.start) /* extend to left */
+ highlight(new_sel_start, vc_sel.start - 2);
else /* contract from left */
- highlight(sel_start, new_sel_start - 2);
+ highlight(vc_sel.start, new_sel_start - 2);
}
else /* some other case; start selection from scratch */
{
clear_selection();
highlight(new_sel_start, new_sel_end);
}
- sel_start = new_sel_start;
- sel_end = new_sel_end;
+ vc_sel.start = new_sel_start;
+ vc_sel.end = new_sel_end;
/* Allocate a new buffer before freeing the old one ... */
- multiplier = use_unicode ? 4 : 1; /* chars can take up to 4 bytes */
- bp = kmalloc_array((sel_end - sel_start) / 2 + 1, multiplier,
+ /* chars can take up to 4 bytes with unicode */
+ bp = kmalloc_array((vc_sel.end - vc_sel.start) / 2 + 1, unicode ? 4 : 1,
GFP_KERNEL);
if (!bp) {
printk(KERN_WARNING "selection: kmalloc() failed\n");
clear_selection();
return -ENOMEM;
}
- kfree(sel_buffer);
- sel_buffer = bp;
+ kfree(vc_sel.buffer);
+ vc_sel.buffer = bp;
obp = bp;
- for (i = sel_start; i <= sel_end; i += 2) {
- c = sel_pos(i);
- if (use_unicode)
+ for (i = vc_sel.start; i <= vc_sel.end; i += 2) {
+ c = sel_pos(i, unicode);
+ if (unicode)
bp += store_utf8(c, bp);
else
*bp++ = c;
@@ -335,7 +334,7 @@ static int __set_selection_kernel(struct tiocl_selection *v, struct tty_struct *
obp = bp;
}
}
- sel_buffer_lth = bp - sel_buffer;
+ vc_sel.buf_len = bp - vc_sel.buffer;
return ret;
}
@@ -344,11 +343,11 @@ int set_selection_kernel(struct tiocl_selection *v, struct tty_struct *tty)
{
int ret;
- mutex_lock(&sel_lock);
+ mutex_lock(&vc_sel.lock);
console_lock();
ret = __set_selection_kernel(v, tty);
console_unlock();
- mutex_unlock(&sel_lock);
+ mutex_unlock(&vc_sel.lock);
return ret;
}
@@ -380,26 +379,26 @@ int paste_selection(struct tty_struct *tty)
tty_buffer_lock_exclusive(&vc->port);
add_wait_queue(&vc->paste_wait, &wait);
- mutex_lock(&sel_lock);
- while (sel_buffer && sel_buffer_lth > pasted) {
+ mutex_lock(&vc_sel.lock);
+ while (vc_sel.buffer && vc_sel.buf_len > pasted) {
set_current_state(TASK_INTERRUPTIBLE);
if (signal_pending(current)) {
ret = -EINTR;
break;
}
if (tty_throttled(tty)) {
- mutex_unlock(&sel_lock);
+ mutex_unlock(&vc_sel.lock);
schedule();
- mutex_lock(&sel_lock);
+ mutex_lock(&vc_sel.lock);
continue;
}
__set_current_state(TASK_RUNNING);
- count = sel_buffer_lth - pasted;
- count = tty_ldisc_receive_buf(ld, sel_buffer + pasted, NULL,
+ count = vc_sel.buf_len - pasted;
+ count = tty_ldisc_receive_buf(ld, vc_sel.buffer + pasted, NULL,
count);
pasted += count;
}
- mutex_unlock(&sel_lock);
+ mutex_unlock(&vc_sel.lock);
remove_wait_queue(&vc->paste_wait, &wait);
__set_current_state(TASK_RUNNING);
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index 15d27698054a..309a39197be0 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -890,8 +890,9 @@ static void hide_softcursor(struct vc_data *vc)
static void hide_cursor(struct vc_data *vc)
{
- if (vc == sel_cons)
+ if (vc_is_sel(vc))
clear_selection();
+
vc->vc_sw->con_cursor(vc, CM_ERASE);
hide_softcursor(vc);
}
@@ -901,7 +902,7 @@ static void set_cursor(struct vc_data *vc)
if (!con_is_fg(vc) || console_blanked || vc->vc_mode == KD_GRAPHICS)
return;
if (vc->vc_deccm) {
- if (vc == sel_cons)
+ if (vc_is_sel(vc))
clear_selection();
add_softcursor(vc);
if ((vc->vc_cursor_type & 0x0f) != 1)
@@ -1074,6 +1075,17 @@ static void visual_deinit(struct vc_data *vc)
module_put(vc->vc_sw->owner);
}
+static void vc_port_destruct(struct tty_port *port)
+{
+ struct vc_data *vc = container_of(port, struct vc_data, port);
+
+ kfree(vc);
+}
+
+static const struct tty_port_operations vc_port_ops = {
+ .destruct = vc_port_destruct,
+};
+
int vc_allocate(unsigned int currcons) /* return 0 on success */
{
struct vt_notifier_param param;
@@ -1099,6 +1111,7 @@ int vc_allocate(unsigned int currcons) /* return 0 on success */
vc_cons[currcons].d = vc;
tty_port_init(&vc->port);
+ vc->port.ops = &vc_port_ops;
INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
visual_init(vc, currcons, 1);
@@ -1207,7 +1220,7 @@ static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
}
}
- if (vc == sel_cons)
+ if (vc_is_sel(vc))
clear_selection();
old_rows = vc->vc_rows;
@@ -1901,67 +1914,65 @@ static void set_mode(struct vc_data *vc, int on_off)
/* console_lock is held */
static void setterm_command(struct vc_data *vc)
{
- switch(vc->vc_par[0]) {
- case 1: /* set color for underline mode */
- if (vc->vc_can_do_color &&
- vc->vc_par[1] < 16) {
- vc->vc_ulcolor = color_table[vc->vc_par[1]];
- if (vc->vc_underline)
- update_attr(vc);
- }
- break;
- case 2: /* set color for half intensity mode */
- if (vc->vc_can_do_color &&
- vc->vc_par[1] < 16) {
- vc->vc_halfcolor = color_table[vc->vc_par[1]];
- if (vc->vc_intensity == 0)
- update_attr(vc);
- }
- break;
- case 8: /* store colors as defaults */
- vc->vc_def_color = vc->vc_attr;
- if (vc->vc_hi_font_mask == 0x100)
- vc->vc_def_color >>= 1;
- default_attr(vc);
- update_attr(vc);
- break;
- case 9: /* set blanking interval */
- blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60;
- poke_blanked_console();
- break;
- case 10: /* set bell frequency in Hz */
- if (vc->vc_npar >= 1)
- vc->vc_bell_pitch = vc->vc_par[1];
- else
- vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
- break;
- case 11: /* set bell duration in msec */
- if (vc->vc_npar >= 1)
- vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
- msecs_to_jiffies(vc->vc_par[1]) : 0;
- else
- vc->vc_bell_duration = DEFAULT_BELL_DURATION;
- break;
- case 12: /* bring specified console to the front */
- if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
- set_console(vc->vc_par[1] - 1);
- break;
- case 13: /* unblank the screen */
- poke_blanked_console();
- break;
- case 14: /* set vesa powerdown interval */
- vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
- break;
- case 15: /* activate the previous console */
- set_console(last_console);
- break;
- case 16: /* set cursor blink duration in msec */
- if (vc->vc_npar >= 1 && vc->vc_par[1] >= 50 &&
- vc->vc_par[1] <= USHRT_MAX)
- vc->vc_cur_blink_ms = vc->vc_par[1];
- else
- vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS;
- break;
+ switch (vc->vc_par[0]) {
+ case 1: /* set color for underline mode */
+ if (vc->vc_can_do_color && vc->vc_par[1] < 16) {
+ vc->vc_ulcolor = color_table[vc->vc_par[1]];
+ if (vc->vc_underline)
+ update_attr(vc);
+ }
+ break;
+ case 2: /* set color for half intensity mode */
+ if (vc->vc_can_do_color && vc->vc_par[1] < 16) {
+ vc->vc_halfcolor = color_table[vc->vc_par[1]];
+ if (vc->vc_intensity == 0)
+ update_attr(vc);
+ }
+ break;
+ case 8: /* store colors as defaults */
+ vc->vc_def_color = vc->vc_attr;
+ if (vc->vc_hi_font_mask == 0x100)
+ vc->vc_def_color >>= 1;
+ default_attr(vc);
+ update_attr(vc);
+ break;
+ case 9: /* set blanking interval */
+ blankinterval = min(vc->vc_par[1], 60U) * 60;
+ poke_blanked_console();
+ break;
+ case 10: /* set bell frequency in Hz */
+ if (vc->vc_npar >= 1)
+ vc->vc_bell_pitch = vc->vc_par[1];
+ else
+ vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
+ break;
+ case 11: /* set bell duration in msec */
+ if (vc->vc_npar >= 1)
+ vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
+ msecs_to_jiffies(vc->vc_par[1]) : 0;
+ else
+ vc->vc_bell_duration = DEFAULT_BELL_DURATION;
+ break;
+ case 12: /* bring specified console to the front */
+ if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
+ set_console(vc->vc_par[1] - 1);
+ break;
+ case 13: /* unblank the screen */
+ poke_blanked_console();
+ break;
+ case 14: /* set vesa powerdown interval */
+ vesa_off_interval = min(vc->vc_par[1], 60U) * 60 * HZ;
+ break;
+ case 15: /* activate the previous console */
+ set_console(last_console);
+ break;
+ case 16: /* set cursor blink duration in msec */
+ if (vc->vc_npar >= 1 && vc->vc_par[1] >= 50 &&
+ vc->vc_par[1] <= USHRT_MAX)
+ vc->vc_cur_blink_ms = vc->vc_par[1];
+ else
+ vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS;
+ break;
}
}
@@ -2576,8 +2587,6 @@ static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int co
if (in_interrupt())
return count;
- might_sleep();
-
console_lock();
vc = tty->driver_data;
if (vc == NULL) {
@@ -3253,6 +3262,7 @@ static int con_install(struct tty_driver *driver, struct tty_struct *tty)
tty->driver_data = vc;
vc->port.tty = tty;
+ tty_port_get(&vc->port);
if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
@@ -3288,6 +3298,13 @@ static void con_shutdown(struct tty_struct *tty)
console_unlock();
}
+static void con_cleanup(struct tty_struct *tty)
+{
+ struct vc_data *vc = tty->driver_data;
+
+ tty_port_put(&vc->port);
+}
+
static int default_color = 7; /* white */
static int default_italic_color = 2; // green (ASCII)
static int default_underline_color = 3; // cyan (ASCII)
@@ -3413,7 +3430,8 @@ static const struct tty_operations con_ops = {
.throttle = con_throttle,
.unthrottle = con_unthrottle,
.resize = vt_resize,
- .shutdown = con_shutdown
+ .shutdown = con_shutdown,
+ .cleanup = con_cleanup,
};
static struct cdev vc0_cdev;
diff --git a/drivers/tty/vt/vt_ioctl.c b/drivers/tty/vt/vt_ioctl.c
index ee6c91ef1f6c..daf61c28ba76 100644
--- a/drivers/tty/vt/vt_ioctl.c
+++ b/drivers/tty/vt/vt_ioctl.c
@@ -39,11 +39,32 @@
#include <linux/kbd_diacr.h>
#include <linux/selection.h>
-char vt_dont_switch;
-extern struct tty_driver *console_driver;
+bool vt_dont_switch;
-#define VT_IS_IN_USE(i) (console_driver->ttys[i] && console_driver->ttys[i]->count)
-#define VT_BUSY(i) (VT_IS_IN_USE(i) || i == fg_console || vc_cons[i].d == sel_cons)
+static inline bool vt_in_use(unsigned int i)
+{
+ const struct vc_data *vc = vc_cons[i].d;
+
+ /*
+ * console_lock must be held to prevent the vc from being deallocated
+ * while we're checking whether it's in-use.
+ */
+ WARN_CONSOLE_UNLOCKED();
+
+ return vc && kref_read(&vc->port.kref) > 1;
+}
+
+static inline bool vt_busy(int i)
+{
+ if (vt_in_use(i))
+ return true;
+ if (i == fg_console)
+ return true;
+ if (vc_is_sel(vc_cons[i].d))
+ return true;
+
+ return false;
+}
/*
* Console (vt and kd) routines, as defined by USL SVR4 manual, and by
@@ -289,16 +310,14 @@ static int vt_disallocate(unsigned int vc_num)
int ret = 0;
console_lock();
- if (VT_BUSY(vc_num))
+ if (vt_busy(vc_num))
ret = -EBUSY;
else if (vc_num)
vc = vc_deallocate(vc_num);
console_unlock();
- if (vc && vc_num >= MIN_NR_CONSOLES) {
- tty_port_destroy(&vc->port);
- kfree(vc);
- }
+ if (vc && vc_num >= MIN_NR_CONSOLES)
+ tty_port_put(&vc->port);
return ret;
}
@@ -311,17 +330,15 @@ static void vt_disallocate_all(void)
console_lock();
for (i = 1; i < MAX_NR_CONSOLES; i++)
- if (!VT_BUSY(i))
+ if (!vt_busy(i))
vc[i] = vc_deallocate(i);
else
vc[i] = NULL;
console_unlock();
for (i = 1; i < MAX_NR_CONSOLES; i++) {
- if (vc[i] && i >= MIN_NR_CONSOLES) {
- tty_port_destroy(&vc[i]->port);
- kfree(vc[i]);
- }
+ if (vc[i] && i >= MIN_NR_CONSOLES)
+ tty_port_put(&vc[i]->port);
}
}
@@ -335,22 +352,13 @@ int vt_ioctl(struct tty_struct *tty,
{
struct vc_data *vc = tty->driver_data;
struct console_font_op op; /* used in multiple places here */
- unsigned int console;
+ unsigned int console = vc->vc_num;
unsigned char ucval;
unsigned int uival;
void __user *up = (void __user *)arg;
int i, perm;
int ret = 0;
- console = vc->vc_num;
-
-
- if (!vc_cons_allocated(console)) { /* impossible? */
- ret = -ENOIOCTLCMD;
- goto out;
- }
-
-
/*
* To have permissions to do most of the vt ioctls, we either have
* to be the owner of the tty, or have CAP_SYS_TTY_CONFIG.
@@ -641,15 +649,16 @@ int vt_ioctl(struct tty_struct *tty,
struct vt_stat __user *vtstat = up;
unsigned short state, mask;
- /* Review: FIXME: Console lock ? */
if (put_user(fg_console + 1, &vtstat->v_active))
ret = -EFAULT;
else {
state = 1; /* /dev/tty0 is always open */
+ console_lock(); /* required by vt_in_use() */
for (i = 0, mask = 2; i < MAX_NR_CONSOLES && mask;
++i, mask <<= 1)
- if (VT_IS_IN_USE(i))
+ if (vt_in_use(i))
state |= mask;
+ console_unlock();
ret = put_user(state, &vtstat->v_state);
}
break;
@@ -659,10 +668,11 @@ int vt_ioctl(struct tty_struct *tty,
* Returns the first available (non-opened) console.
*/
case VT_OPENQRY:
- /* FIXME: locking ? - but then this is a stupid API */
+ console_lock(); /* required by vt_in_use() */
for (i = 0; i < MAX_NR_CONSOLES; ++i)
- if (! VT_IS_IN_USE(i))
+ if (!vt_in_use(i))
break;
+ console_unlock();
uival = i < MAX_NR_CONSOLES ? (i+1) : -1;
goto setint;
@@ -1011,12 +1021,12 @@ int vt_ioctl(struct tty_struct *tty,
case VT_LOCKSWITCH:
if (!capable(CAP_SYS_TTY_CONFIG))
return -EPERM;
- vt_dont_switch = 1;
+ vt_dont_switch = true;
break;
case VT_UNLOCKSWITCH:
if (!capable(CAP_SYS_TTY_CONFIG))
return -EPERM;
- vt_dont_switch = 0;
+ vt_dont_switch = false;
break;
case VT_GETHIFONTMASK:
ret = put_user(vc->vc_hi_font_mask,
@@ -1180,14 +1190,9 @@ long vt_compat_ioctl(struct tty_struct *tty,
{
struct vc_data *vc = tty->driver_data;
struct console_font_op op; /* used in multiple places here */
- unsigned int console = vc->vc_num;
void __user *up = compat_ptr(arg);
int perm;
-
- if (!vc_cons_allocated(console)) /* impossible? */
- return -ENOIOCTLCMD;
-
/*
* To have permissions to do most of the vt ioctls, we either have
* to be the owner of the tty, or have CAP_SYS_TTY_CONFIG.
diff --git a/include/linux/console.h b/include/linux/console.h
index f33016b3a401..7a140f4e5d0c 100644
--- a/include/linux/console.h
+++ b/include/linux/console.h
@@ -148,6 +148,7 @@ struct console {
struct tty_driver *(*device)(struct console *, int *);
void (*unblank)(void);
int (*setup)(struct console *, char *);
+ int (*exit)(struct console *);
int (*match)(struct console *, char *name, int idx, char *options);
short flags;
short index;
diff --git a/include/linux/selection.h b/include/linux/selection.h
index e2c1f96bf059..5b890ef5b59f 100644
--- a/include/linux/selection.h
+++ b/include/linux/selection.h
@@ -11,8 +11,8 @@
#include <linux/tiocl.h>
#include <linux/vt_buffer.h>
-extern struct vc_data *sel_cons;
struct tty_struct;
+struct vc_data;
extern void clear_selection(void);
extern int set_selection_user(const struct tiocl_selection __user *sel,
@@ -24,6 +24,8 @@ extern int sel_loadlut(char __user *p);
extern int mouse_reporting(void);
extern void mouse_report(struct tty_struct * tty, int butt, int mrx, int mry);
+bool vc_is_sel(struct vc_data *vc);
+
extern int console_blanked;
extern const unsigned char color_table[];
diff --git a/include/linux/serial_8250.h b/include/linux/serial_8250.h
index 6a8e8c48c882..6545f8cfc8fa 100644
--- a/include/linux/serial_8250.h
+++ b/include/linux/serial_8250.h
@@ -81,6 +81,7 @@ struct uart_8250_em485 {
struct hrtimer stop_tx_timer; /* "rs485 stop tx" timer */
struct hrtimer *active_timer; /* pointer to active timer */
struct uart_8250_port *port; /* for hrtimer callbacks */
+ unsigned int tx_stopped:1; /* tx is currently stopped */
};
/*
@@ -132,6 +133,8 @@ struct uart_8250_port {
void (*dl_write)(struct uart_8250_port *, int);
struct uart_8250_em485 *em485;
+ void (*rs485_start_tx)(struct uart_8250_port *);
+ void (*rs485_stop_tx)(struct uart_8250_port *);
/* Serial port overrun backoff */
struct delayed_work overrun_backoff;
@@ -176,6 +179,7 @@ void serial8250_set_defaults(struct uart_8250_port *up);
void serial8250_console_write(struct uart_8250_port *up, const char *s,
unsigned int count);
int serial8250_console_setup(struct uart_port *port, char *options, bool probe);
+int serial8250_console_exit(struct uart_port *port);
extern void serial8250_set_isa_configurator(void (*v)
(int port, struct uart_port *up,
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index 52404ef1694e..92f5eba86052 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -243,6 +243,7 @@ struct uart_port {
unsigned long sysrq; /* sysrq timeout */
unsigned int sysrq_ch; /* char for sysrq */
unsigned char has_sysrq;
+ unsigned char sysrq_seq; /* index in sysrq_toggle_seq */
unsigned char hub6; /* this should be in the 8250 driver */
unsigned char suspended;
@@ -461,8 +462,7 @@ extern void uart_insert_char(struct uart_port *port, unsigned int status,
extern int uart_handle_sysrq_char(struct uart_port *port, unsigned int ch);
extern int uart_prepare_sysrq_char(struct uart_port *port, unsigned int ch);
-extern void uart_unlock_and_check_sysrq(struct uart_port *port,
- unsigned long irqflags);
+extern void uart_unlock_and_check_sysrq(struct uart_port *port, unsigned long flags);
extern int uart_handle_break(struct uart_port *port);
/*
diff --git a/include/linux/spi/ifx_modem.h b/include/linux/spi/ifx_modem.h
index 694268c78d5d..6d19b09139d0 100644
--- a/include/linux/spi/ifx_modem.h
+++ b/include/linux/spi/ifx_modem.h
@@ -3,12 +3,7 @@
#define LINUX_IFX_MODEM_H
struct ifx_modem_platform_data {
- unsigned short rst_out; /* modem reset out */
- unsigned short pwr_on; /* power on */
- unsigned short rst_pmu; /* reset modem */
unsigned short tx_pwr; /* modem power threshold */
- unsigned short srdy; /* SRDY */
- unsigned short mrdy; /* MRDY */
unsigned char modem_type; /* Modem type */
unsigned long max_hz; /* max SPI frequency */
unsigned short use_dma:1; /* spi protocol driver supplies
diff --git a/include/linux/sysrq.h b/include/linux/sysrq.h
index 8c71874e8485..8e159e16850f 100644
--- a/include/linux/sysrq.h
+++ b/include/linux/sysrq.h
@@ -50,6 +50,7 @@ int unregister_sysrq_key(int key, struct sysrq_key_op *op);
struct sysrq_key_op *__sysrq_get_key_op(int key);
int sysrq_toggle_support(int enable_mask);
+int sysrq_mask(void);
#else
@@ -71,6 +72,12 @@ static inline int unregister_sysrq_key(int key, struct sysrq_key_op *op)
return -EINVAL;
}
+static inline int sysrq_mask(void)
+{
+ /* Magic SysRq disabled mask */
+ return 0;
+}
+
#endif
#endif /* _LINUX_SYSRQ_H */
diff --git a/include/linux/vt_kern.h b/include/linux/vt_kern.h
index 8dc77e40bc03..abf5bccf906a 100644
--- a/include/linux/vt_kern.h
+++ b/include/linux/vt_kern.h
@@ -28,8 +28,9 @@
#define BROKEN_GRAPHICS_PROGRAMS 1
#endif
-extern void kd_mksound(unsigned int hz, unsigned int ticks);
-extern int kbd_rate(struct kbd_repeat *rep);
+void kd_mksound(unsigned int hz, unsigned int ticks);
+int kbd_rate(struct kbd_repeat *rep);
+
extern int fg_console, last_console, want_console;
/* console.c */
@@ -131,11 +132,11 @@ void vt_event_post(unsigned int event, unsigned int old, unsigned int new);
int vt_waitactive(int n);
void change_console(struct vc_data *new_vc);
void reset_vc(struct vc_data *vc);
-extern int do_unbind_con_driver(const struct consw *csw, int first, int last,
- int deflt);
+int do_unbind_con_driver(const struct consw *csw, int first, int last,
+ int deflt);
int vty_init(const struct file_operations *console_fops);
-extern char vt_dont_switch;
+extern bool vt_dont_switch;
extern int default_utf8;
extern int global_cursor_default;
@@ -146,7 +147,7 @@ struct vt_spawn_console {
};
extern struct vt_spawn_console vt_spawn_con;
-extern int vt_move_to_console(unsigned int vt, int alloc);
+int vt_move_to_console(unsigned int vt, int alloc);
/* Interfaces for VC notification of character events (for accessibility etc) */
@@ -155,35 +156,34 @@ struct vt_notifier_param {
unsigned int c; /* Printed char */
};
-extern int register_vt_notifier(struct notifier_block *nb);
-extern int unregister_vt_notifier(struct notifier_block *nb);
+int register_vt_notifier(struct notifier_block *nb);
+int unregister_vt_notifier(struct notifier_block *nb);
-extern void hide_boot_cursor(bool hide);
+void hide_boot_cursor(bool hide);
/* keyboard provided interfaces */
-extern int vt_do_diacrit(unsigned int cmd, void __user *up, int eperm);
-extern int vt_do_kdskbmode(int console, unsigned int arg);
-extern int vt_do_kdskbmeta(int console, unsigned int arg);
-extern int vt_do_kbkeycode_ioctl(int cmd, struct kbkeycode __user *user_kbkc,
- int perm);
-extern int vt_do_kdsk_ioctl(int cmd, struct kbentry __user *user_kbe,
- int perm, int console);
-extern int vt_do_kdgkb_ioctl(int cmd, struct kbsentry __user *user_kdgkb,
- int perm);
-extern int vt_do_kdskled(int console, int cmd, unsigned long arg, int perm);
-extern int vt_do_kdgkbmode(int console);
-extern int vt_do_kdgkbmeta(int console);
-extern void vt_reset_unicode(int console);
-extern int vt_get_shift_state(void);
-extern void vt_reset_keyboard(int console);
-extern int vt_get_leds(int console, int flag);
-extern int vt_get_kbd_mode_bit(int console, int bit);
-extern void vt_set_kbd_mode_bit(int console, int bit);
-extern void vt_clr_kbd_mode_bit(int console, int bit);
-extern void vt_set_led_state(int console, int leds);
-extern void vt_set_led_state(int console, int leds);
-extern void vt_kbd_con_start(int console);
-extern void vt_kbd_con_stop(int console);
+int vt_do_diacrit(unsigned int cmd, void __user *up, int eperm);
+int vt_do_kdskbmode(int console, unsigned int arg);
+int vt_do_kdskbmeta(int console, unsigned int arg);
+int vt_do_kbkeycode_ioctl(int cmd, struct kbkeycode __user *user_kbkc,
+ int perm);
+int vt_do_kdsk_ioctl(int cmd, struct kbentry __user *user_kbe, int perm,
+ int console);
+int vt_do_kdgkb_ioctl(int cmd, struct kbsentry __user *user_kdgkb, int perm);
+int vt_do_kdskled(int console, int cmd, unsigned long arg, int perm);
+int vt_do_kdgkbmode(int console);
+int vt_do_kdgkbmeta(int console);
+void vt_reset_unicode(int console);
+int vt_get_shift_state(void);
+void vt_reset_keyboard(int console);
+int vt_get_leds(int console, int flag);
+int vt_get_kbd_mode_bit(int console, int bit);
+void vt_set_kbd_mode_bit(int console, int bit);
+void vt_clr_kbd_mode_bit(int console, int bit);
+void vt_set_led_state(int console, int leds);
+void vt_set_led_state(int console, int leds);
+void vt_kbd_con_start(int console);
+void vt_kbd_con_stop(int console);
void vc_scrolldelta_helper(struct vc_data *c, int lines,
unsigned int rolled_over, void *_base, unsigned int size);
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index fada22dc4ab6..633f41a11d75 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -1772,9 +1772,6 @@ static void call_console_drivers(const char *ext_text, size_t ext_len,
trace_console_rcuidle(text, len);
- if (!console_drivers)
- return;
-
for_each_console(con) {
if (exclusive_console && con != exclusive_console)
continue;
@@ -2653,19 +2650,17 @@ void register_console(struct console *newcon)
struct console_cmdline *c;
static bool has_preferred;
- if (console_drivers)
- for_each_console(bcon)
- if (WARN(bcon == newcon,
- "console '%s%d' already registered\n",
- bcon->name, bcon->index))
- return;
+ for_each_console(bcon) {
+ if (WARN(bcon == newcon, "console '%s%d' already registered\n",
+ bcon->name, bcon->index))
+ return;
+ }
/*
* before we register a new CON_BOOT console, make sure we don't
* already have a valid console
*/
- if (console_drivers && newcon->flags & CON_BOOT) {
- /* find the last or real console */
+ if (newcon->flags & CON_BOOT) {
for_each_console(bcon) {
if (!(bcon->flags & CON_BOOT)) {
pr_info("Too late to register bootconsole %s%d\n",
@@ -2813,7 +2808,7 @@ EXPORT_SYMBOL(register_console);
int unregister_console(struct console *console)
{
- struct console *a, *b;
+ struct console *con;
int res;
pr_info("%sconsole [%s%d] disabled\n",
@@ -2821,26 +2816,30 @@ int unregister_console(struct console *console)
console->name, console->index);
res = _braille_unregister_console(console);
- if (res)
+ if (res < 0)
return res;
+ if (res > 0)
+ return 0;
- res = 1;
+ res = -ENODEV;
console_lock();
if (console_drivers == console) {
console_drivers=console->next;
res = 0;
- } else if (console_drivers) {
- for (a=console_drivers->next, b=console_drivers ;
- a; b=a, a=b->next) {
- if (a == console) {
- b->next = a->next;
+ } else {
+ for_each_console(con) {
+ if (con->next == console) {
+ con->next = console->next;
res = 0;
break;
}
}
}
- if (!res && (console->flags & CON_EXTENDED))
+ if (res)
+ goto out_disable_unlock;
+
+ if (console->flags & CON_EXTENDED)
nr_ext_console_drivers--;
/*
@@ -2853,6 +2852,16 @@ int unregister_console(struct console *console)
console->flags &= ~CON_ENABLED;
console_unlock();
console_sysfs_notify();
+
+ if (console->exit)
+ res = console->exit(console);
+
+ return res;
+
+out_disable_unlock:
+ console->flags &= ~CON_ENABLED;
+ console_unlock();
+
return res;
}
EXPORT_SYMBOL(unregister_console);
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index ad5b88a53c5a..94638f695e60 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -229,25 +229,8 @@ static int proc_dopipe_max_size(struct ctl_table *table, int write,
void __user *buffer, size_t *lenp, loff_t *ppos);
#ifdef CONFIG_MAGIC_SYSRQ
-/* Note: sysrq code uses its own private copy */
-static int __sysrq_enabled = CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE;
-
static int sysrq_sysctl_handler(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp,
- loff_t *ppos)
-{
- int error;
-
- error = proc_dointvec(table, write, buffer, lenp, ppos);
- if (error)
- return error;
-
- if (write)
- sysrq_toggle_support(__sysrq_enabled);
-
- return 0;
-}
-
+ void __user *buffer, size_t *lenp, loff_t *ppos);
#endif
static struct ctl_table kern_table[];
@@ -747,7 +730,7 @@ static struct ctl_table kern_table[] = {
#ifdef CONFIG_MAGIC_SYSRQ
{
.procname = "sysrq",
- .data = &__sysrq_enabled,
+ .data = NULL,
.maxlen = sizeof (int),
.mode = 0644,
.proc_handler = sysrq_sysctl_handler,
@@ -2835,6 +2818,26 @@ static int proc_dostring_coredump(struct ctl_table *table, int write,
}
#endif
+#ifdef CONFIG_MAGIC_SYSRQ
+static int sysrq_sysctl_handler(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ int tmp, ret;
+
+ tmp = sysrq_mask();
+
+ ret = __do_proc_dointvec(&tmp, table, write, buffer,
+ lenp, ppos, NULL, NULL);
+ if (ret || !write)
+ return ret;
+
+ if (write)
+ sysrq_toggle_support(tmp);
+
+ return 0;
+}
+#endif
+
static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write,
void __user *buffer,
size_t *lenp, loff_t *ppos,
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 1ae560370581..a85a6a423bf4 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -430,6 +430,16 @@ config MAGIC_SYSRQ_SERIAL
This option allows you to decide whether you want to enable the
magic SysRq key.
+config MAGIC_SYSRQ_SERIAL_SEQUENCE
+ string "Char sequence that enables magic SysRq over serial"
+ depends on MAGIC_SYSRQ_SERIAL
+ default ""
+ help
+ Specifies a sequence of characters that can follow BREAK to enable
+ SysRq on a serial console.
+
+ If unsure, leave an empty string and the option will not be enabled.
+
config DEBUG_FS
bool "Debug Filesystem"
help