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sdio: add /proc interface to sdio_uart driver

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This mimics what the serial_core does.  Useful for diagnostics.

Signed-off-by: Nicolas Pitre <npitre@mvista.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
This commit is contained in:
Nicolas Pitre 2007-07-04 23:40:34 -04:00 committed by Pierre Ossman
parent 6e418a9d26
commit 5ed334a1f8
1 changed files with 62 additions and 0 deletions
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62
drivers/mmc/card/sdio_uart.c
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@ -913,6 +913,67 @@ static int sdio_uart_tiocmset(struct tty_struct *tty, struct file *file,
return result;
}
static int sdio_uart_read_proc(char *page, char **start, off_t off,
int count, int *eof, void *data)
{
int i, len = 0;
off_t begin = 0;
len += sprintf(page, "serinfo:1.0 driver%s%s revision:%s\n",
"", "", "");
for (i = 0; i < UART_NR && len < PAGE_SIZE - 96; i++) {
struct sdio_uart_port *port = sdio_uart_port_get(i);
if (port) {
len += sprintf(page+len, "%d: uart:SDIO", i);
if(capable(CAP_SYS_ADMIN)) {
len += sprintf(page + len, " tx:%d rx:%d",
port->icount.tx, port->icount.rx);
if (port->icount.frame)
len += sprintf(page + len, " fe:%d",
port->icount.frame);
if (port->icount.parity)
len += sprintf(page + len, " pe:%d",
port->icount.parity);
if (port->icount.brk)
len += sprintf(page + len, " brk:%d",
port->icount.brk);
if (port->icount.overrun)
len += sprintf(page + len, " oe:%d",
port->icount.overrun);
if (port->icount.cts)
len += sprintf(page + len, " cts:%d",
port->icount.cts);
if (port->icount.dsr)
len += sprintf(page + len, " dsr:%d",
port->icount.dsr);
if (port->icount.rng)
len += sprintf(page + len, " rng:%d",
port->icount.rng);
if (port->icount.dcd)
len += sprintf(page + len, " dcd:%d",
port->icount.dcd);
}
strcat(page, "\n");
len++;
sdio_uart_port_put(port);
}
if (len + begin > off + count)
goto done;
if (len + begin < off) {
begin += len;
len = 0;
}
}
*eof = 1;
done:
if (off >= len + begin)
return 0;
*start = page + (off - begin);
return (count < begin + len - off) ? count : (begin + len - off);
}
static const struct tty_operations sdio_uart_ops = {
.open = sdio_uart_open,
.close = sdio_uart_close,
@ -926,6 +987,7 @@ static const struct tty_operations sdio_uart_ops = {
.break_ctl = sdio_uart_break_ctl,
.tiocmget = sdio_uart_tiocmget,
.tiocmset = sdio_uart_tiocmset,
.read_proc = sdio_uart_read_proc,
};
static struct tty_driver *sdio_uart_tty_driver;