From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alan Cox Subject: [PATCH 11/11] sdio_uart: add modem functionality Date: Tue, 03 Nov 2009 14:19:40 +0000 Message-ID: <20091103141903.31032.28460.stgit@localhost.localdomain> References: <20091103141525.31032.45206.stgit@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Return-path: Received: from earthlight.etchedpixels.co.uk ([81.2.110.250]:55434 "EHLO bob.linux.org.uk" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752614AbZKCOdE (ORCPT ); Tue, 3 Nov 2009 09:33:04 -0500 In-Reply-To: <20091103141525.31032.45206.stgit@localhost.localdomain> Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, nico@cam.org Add the POSIX block for carrier Linux TIOCMIWAIT functionality is still lacking from the driver. Signed-off-by: Alan Cox --- drivers/mmc/card/sdio_uart.c | 33 ++++++++++++++++++++++++++++++++- 1 files changed, 32 insertions(+), 1 deletions(-) diff --git a/drivers/mmc/card/sdio_uart.c b/drivers/mmc/card/sdio_uart.c index 0a3acfb..e72e2f2 100644 --- a/drivers/mmc/card/sdio_uart.c +++ b/drivers/mmc/card/sdio_uart.c @@ -29,6 +29,7 @@ #include #include #include +#include #include #include #include @@ -214,6 +216,8 @@ static unsigned int sdio_uart_get_mctrl(struct sdio_uart_port *port) unsigned char status; unsigned int ret; + /* FIXME: What stops this losing the delta bits and breaking + sdio_uart_check_modem_status ? */ status = sdio_in(port, UART_MSR); ret = 0; @@ -495,8 +499,20 @@ static void sdio_uart_check_modem_status(struct sdio_uart_port *port) port->icount.rng++; if (status & UART_MSR_DDSR) port->icount.dsr++; - if (status & UART_MSR_DDCD) + if (status & UART_MSR_DDCD) { port->icount.dcd++; + /* DCD raise - wake for open */ + if (status & UART_MSR_DCD) + wake_up_interruptible(&port->port.open_wait); + else { + /* DCD drop - hang up if tty attached */ + tty = tty_port_tty_get(&port->port); + if (tty) { + tty_hangup(tty); + tty_kref_put(tty); + } + } + } if (status & UART_MSR_DCTS) { port->icount.cts++; tty = tty_port_tty_get(&port->port); @@ -552,6 +568,20 @@ static void sdio_uart_irq(struct sdio_func *func) port->in_sdio_uart_irq = NULL; } +static int uart_carrier_raised(struct tty_port *tport) +{ + struct sdio_uart_port *port = + container_of(tport, struct sdio_uart_port, port); + unsigned int ret = sdio_uart_claim_func(port); + if (ret) /* Missing hardware shoudn't block for carrier */ + return 1; + ret = sdio_uart_get_mctrl(port); + sdio_uart_release_func(port); + if (ret & TIOCM_CAR) + return 1; + return 0; +} + /** * uart_dtr_rts - port helper to set uart signals * @tport: tty port to be updated @@ -1011,6 +1041,7 @@ static const struct file_operations sdio_uart_proc_fops = { static const struct tty_port_operations sdio_uart_port_ops = { .dtr_rts = uart_dtr_rts, + .carrier_raised = uart_carrier_raised, .shutdown = sdio_uart_shutdown, .activate = sdio_uart_activate, };