sdio: add /proc interface to sdio_uart driver (5ed334a1) · Commits · 戴 / test

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;

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