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/* uuterm, Copyright (C) 2006 Rich Felker; licensed under GNU GPL v2 only */
#include <unistd.h>
#include <fcntl.h>
#include <sys/select.h>
#include <signal.h>
#include <termios.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
#include <sys/kd.h>
#include <linux/fb.h>
#include "uuterm.h"
#include "dblbuf.h"
struct priv
{
/* common to all double buffered fb targets */
struct dblbuf b;
/* fbcon-specific */
int fb;
int kb;
int ms;
struct termios tio;
int kbmode;
int mod;
int xres, yres;
void *buf_mem;
};
static int get_fb_size(struct uudisp *d)
{
struct priv *p = (struct priv *)&d->priv;
struct fb_fix_screeninfo fix;
struct fb_var_screeninfo var;
if (ioctl(p->fb, FBIOGET_FSCREENINFO, &fix) < 0
|| ioctl(p->fb, FBIOGET_VSCREENINFO, &var) < 0
|| fix.type != FB_TYPE_PACKED_PIXELS)
return -1;
p->b.bytes_per_pixel = (var.bits_per_pixel+7)>>3;
p->b.line_stride = fix.line_length;
p->b.row_stride = fix.line_length * d->cell_h;
if (var.xres != p->xres || var.yres != p->yres) {
int w = var.xres / d->cell_w;
int h = var.yres / d->cell_h;
void *buf = uuterm_alloc(SLICE_BUF_SIZE(w, h, (d->cell_w+7)/8, d->cell_h));
if (!buf) return -1;
if (p->buf_mem) uuterm_free(p->buf_mem);
p->buf_mem = buf;
p->b.slices = dblbuf_setup_buf(w, h, (d->cell_w+7)/8, d->cell_h, buf);
p->xres = var.xres;
p->yres = var.yres;
d->w = w;
d->h = h;
}
return 0;
}
static void dummy(int x)
{
}
static int mapkey(unsigned *m, unsigned k, unsigned char *s)
{
#define LSHIFT "\200"
#define LCTRL "\201"
#define LALT "\202"
#define RSHIFT "\203"
#define RCTRL "\204"
#define RALT "\205"
#define CAPSLK "\206"
#define NUMLK "\207"
#define SCRLK "\210"
#define WTF "\377"
static const unsigned char keymap[] =
"\0\033" "1234567890-=\177"
"\t" "qwertyuiop[]\r"
LCTRL "asdfghjkl;'`"
LSHIFT "\\zxcvbnm,./" RSHIFT "*"
LALT " " CAPSLK
"\301\302\303\304\305\306\307\310\311\312"
NUMLK SCRLK;
static const unsigned char keymap_sh[] =
"\0\033" "!@#$%^&*()_+\177"
"\t" "QWERTYUIOP{}\r"
LCTRL "ASDFGHJKL:\"~"
LSHIFT "|ZXCVBNM<>?" RSHIFT "*"
LALT " " CAPSLK
"\301\302\303\304\305\306\307\310\311\312"
NUMLK SCRLK;
//71...
static const unsigned char keypad[] = "789-456+1230.";
//64..95 useless
//96...
static const unsigned char keypad2[] = "\r" RCTRL WTF "/" RALT WTF;
//102...
static const unsigned char cursblk[] = "1A5DC4B623";
unsigned c;
unsigned rel = k & 0x80;
int i = 0;
k &= 0x7f;
if (*m & 4) s[i++] = '\033';
if (k < sizeof(keymap)) {
c = keymap[k];
if (c-0200 < 6) {
c &= 15;
if (rel) *m &= ~(1<<c);
else *m |= 1<<c;
return 0;
}
if (rel) return 0;
if (c > 0300) {
c -= 0300;
s[i++] = '\033';
s[i++] = '[';
if (c < 6) s[i++] = '[';
else if (c < 9) s[i++] = '1';
else s[i++] = '2';
s[i++] = "ABCDE7890134"[c-1];
if (c >= 6) s[i++] = '~';
return i;
}
if (c > 0x80) return 0;
if (*m & 9) c = keymap_sh[k];
if (*m & 18) {
if (keymap_sh[k] >= '@') c = keymap_sh[k] & 0x1f;
else c &= 0x1f;
}
s[i++] = c;
return i;
}
if (k-102 < sizeof(cursblk)) {
if (rel) return 0;
s[i++] = '\033';
s[i++] = '[';
c = cursblk[k-102];
s[i++] = c;
if (c < 'A') s[i++] = '~';
return i;
}
return 0;
}
int uudisp_open(struct uudisp *d)
{
struct priv *p = (void *)&d->priv;
struct fb_fix_screeninfo fix;
struct termios tio;
p->fb = p->kb = p->ms = -1;
p->b.vidmem = MAP_FAILED;
if ((p->fb = open("/dev/fb0", O_RDWR)) < 0 || get_fb_size(d) < 0
|| ioctl(p->fb, FBIOGET_FSCREENINFO, &fix) < 0)
goto error;
p->b.vidmem = mmap(0, fix.smem_len, PROT_WRITE|PROT_READ, MAP_SHARED, p->fb, 0);
if (p->b.vidmem == MAP_FAILED)
goto error;
if ((p->kb = open("/dev/tty", O_RDONLY)) < 0
|| ioctl(p->kb, KDGKBMODE, &p->kbmode) < 0
|| ioctl(p->kb, KDSKBMODE, K_MEDIUMRAW) < 0)
goto error;
/* If the above succeeds, the below cannot fail */
ioctl(p->kb, KDSETMODE, KD_GRAPHICS);
tcgetattr(p->kb, &p->tio);
tio = p->tio;
tio.c_cflag = B38400 | CS8 | CLOCAL | CREAD;
tio.c_iflag = 0;
tio.c_oflag = 0;
tio.c_lflag = 0;
tcsetattr(p->kb, TCSANOW, &tio);
signal(SIGWINCH, dummy); /* just to interrupt select! */
signal(SIGTSTP, SIG_IGN);
signal(SIGTTIN, SIG_IGN);
signal(SIGTTOU, SIG_IGN);
return 0;
error:
if (p->b.vidmem != MAP_FAILED) munmap(p->b.vidmem, fix.smem_len);
close(p->fb);
close(p->kb);
close(p->ms);
return -1;
}
int uudisp_fd_set(struct uudisp *d, int tty, void *fds)
{
struct priv *p = (struct priv *)&d->priv;
if (p->ms >= 0) FD_SET(p->ms, (fd_set *)fds);
FD_SET(p->kb, (fd_set *)fds);
return p->kb > tty ? p->kb+1 : tty+1;
}
void uudisp_next_event(struct uudisp *d, void *fds)
{
struct priv *p = (struct priv *)&d->priv;
unsigned char b;
get_fb_size(d);
d->inlen = 0;
d->intext = d->inbuf;
if (FD_ISSET(p->kb, (fd_set *)fds) && read(p->kb, &b, 1) == 1)
d->inlen = mapkey(&p->mod, b, d->intext);
}
void uudisp_close(struct uudisp *d)
{
struct priv *p = (struct priv *)&d->priv;
tcsetattr(p->kb, TCSANOW, &p->tio);
ioctl(p->kb, KDSKBMODE, p->kbmode);
ioctl(p->kb, KDSETMODE, KD_TEXT);
close(p->fb);
close(p->kb);
close(p->ms);
}
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