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Commit 5ed334a1 authored by Nicolas Pitre's avatar Nicolas Pitre Committed by Pierre Ossman
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sdio: add /proc interface to sdio_uart driver 



This mimics what the serial_core does.  Useful for diagnostics.

Signed-off-by: default avatarNicolas Pitre <npitre@mvista.com>
Signed-off-by: default avatarPierre Ossman <drzeus@drzeus.cx>
parent 6e418a9d

drivers/mmc/card/sdio_uart.c

+62 −0
Original line number Diff line number Diff line
@@ -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;