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Message-Id: <1412798258-23655-11-git-send-email-ricardo.ribalda@gmail.com>
Date: Wed, 8 Oct 2014 21:57:36 +0200
From: Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>
To: One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>,
Alan Cox <alan@...ux.intel.com>, linux-serial@...r.kernel.org
Cc: Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Jiri Slaby <jslaby@...e.cz>, linux-kernel@...r.kernel.org
Subject: [PATCH 10/12] serial/omap: Use the rs485 functions on serial_core
In order to unify all the rs485 ioctl handling
Use the implementation of TIOC[GS]RS485 ioctl handling on serial_core.
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Jiri Slaby <jslaby@...e.cz>
Cc: linux-serial@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>
---
drivers/tty/serial/omap-serial.c | 71 +++++++++++++---------------------------
1 file changed, 23 insertions(+), 48 deletions(-)
diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index 18c30ca..9d4726f 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -163,7 +163,6 @@ struct uart_omap_port {
u8 wakeups_enabled;
u32 features;
- struct serial_rs485 rs485;
int rts_gpio;
struct pm_qos_request pm_qos_request;
@@ -316,7 +315,7 @@ static void serial_omap_stop_tx(struct uart_port *port)
pm_runtime_get_sync(up->dev);
/* Handle RS-485 */
- if (up->rs485.flags & SER_RS485_ENABLED) {
+ if (port->rs485.flags & SER_RS485_ENABLED) {
if (up->scr & OMAP_UART_SCR_TX_EMPTY) {
/* THR interrupt is fired when both TX FIFO and TX
* shift register are empty. This means there's nothing
@@ -327,11 +326,13 @@ static void serial_omap_stop_tx(struct uart_port *port)
*/
up->scr &= ~OMAP_UART_SCR_TX_EMPTY;
serial_out(up, UART_OMAP_SCR, up->scr);
- res = (up->rs485.flags & SER_RS485_RTS_AFTER_SEND) ? 1 : 0;
+ res = (port->rs485.flags & SER_RS485_RTS_AFTER_SEND) ?
+ 1 : 0;
if (gpio_get_value(up->rts_gpio) != res) {
- if (up->rs485.delay_rts_after_send > 0)
- mdelay(up->rs485.delay_rts_after_send);
- gpio_set_value(up->rts_gpio, res);
+ if (port->rs485.delay_rts_after_send > 0)
+ mdelay(
+ port->rs485.delay_rts_after_send);
+ gpio_set_value(port->rts_gpio, res);
}
} else {
/* We're asked to stop, but there's still stuff in the
@@ -353,8 +354,8 @@ static void serial_omap_stop_tx(struct uart_port *port)
serial_out(up, UART_IER, up->ier);
}
- if ((up->rs485.flags & SER_RS485_ENABLED) &&
- !(up->rs485.flags & SER_RS485_RX_DURING_TX)) {
+ if ((port->rs485.flags & SER_RS485_ENABLED) &&
+ !(port->rs485.flags & SER_RS485_RX_DURING_TX)) {
/*
* Empty the RX FIFO, we are not interested in anything
* received during the half-duplex transmission.
@@ -429,22 +430,22 @@ static void serial_omap_start_tx(struct uart_port *port)
pm_runtime_get_sync(up->dev);
/* Handle RS-485 */
- if (up->rs485.flags & SER_RS485_ENABLED) {
+ if (port->rs485.flags & SER_RS485_ENABLED) {
/* Fire THR interrupts when FIFO is below trigger level */
up->scr &= ~OMAP_UART_SCR_TX_EMPTY;
serial_out(up, UART_OMAP_SCR, up->scr);
/* if rts not already enabled */
- res = (up->rs485.flags & SER_RS485_RTS_ON_SEND) ? 1 : 0;
+ res = (port->rs485.flags & SER_RS485_RTS_ON_SEND) ? 1 : 0;
if (gpio_get_value(up->rts_gpio) != res) {
gpio_set_value(up->rts_gpio, res);
- if (up->rs485.delay_rts_before_send > 0)
- mdelay(up->rs485.delay_rts_before_send);
+ if (port->rs485.delay_rts_before_send > 0)
+ mdelay(port->rs485.delay_rts_before_send);
}
}
- if ((up->rs485.flags & SER_RS485_ENABLED) &&
- !(up->rs485.flags & SER_RS485_RX_DURING_TX))
+ if ((port->rs485.flags & SER_RS485_ENABLED) &&
+ !(port->rs485.flags & SER_RS485_RX_DURING_TX))
serial_omap_stop_rx(port);
serial_omap_enable_ier_thri(up);
@@ -1355,7 +1356,7 @@ static inline void serial_omap_add_console_port(struct uart_omap_port *up)
#endif
/* Enable or disable the rs485 support */
-static void
+static int
serial_omap_config_rs485(struct uart_port *port, struct serial_rs485 *rs485conf)
{
struct uart_omap_port *up = to_uart_omap_port(port);
@@ -1372,7 +1373,7 @@ serial_omap_config_rs485(struct uart_port *port, struct serial_rs485 *rs485conf)
serial_out(up, UART_IER, 0);
/* store new config */
- up->rs485 = *rs485conf;
+ port->rs485 = *rs485conf;
/*
* Just as a precaution, only allow rs485
@@ -1380,12 +1381,12 @@ serial_omap_config_rs485(struct uart_port *port, struct serial_rs485 *rs485conf)
*/
if (gpio_is_valid(up->rts_gpio)) {
/* enable / disable rts */
- val = (up->rs485.flags & SER_RS485_ENABLED) ?
+ val = (port->rs485.flags & SER_RS485_ENABLED) ?
SER_RS485_RTS_AFTER_SEND : SER_RS485_RTS_ON_SEND;
- val = (up->rs485.flags & val) ? 1 : 0;
+ val = (port->rs485.flags & val) ? 1 : 0;
gpio_set_value(up->rts_gpio, val);
} else
- up->rs485.flags &= ~SER_RS485_ENABLED;
+ port->rs485.flags &= ~SER_RS485_ENABLED;
/* Enable interrupts */
up->ier = mode;
@@ -1394,7 +1395,7 @@ serial_omap_config_rs485(struct uart_port *port, struct serial_rs485 *rs485conf)
/* If RS-485 is disabled, make sure the THR interrupt is fired when
* TX FIFO is below the trigger level.
*/
- if (!(up->rs485.flags & SER_RS485_ENABLED) &&
+ if (!(port->rs485.flags & SER_RS485_ENABLED) &&
(up->scr & OMAP_UART_SCR_TX_EMPTY)) {
up->scr &= ~OMAP_UART_SCR_TX_EMPTY;
serial_out(up, UART_OMAP_SCR, up->scr);
@@ -1403,36 +1404,10 @@ serial_omap_config_rs485(struct uart_port *port, struct serial_rs485 *rs485conf)
spin_unlock_irqrestore(&up->port.lock, flags);
pm_runtime_mark_last_busy(up->dev);
pm_runtime_put_autosuspend(up->dev);
-}
-
-static int
-serial_omap_ioctl(struct uart_port *port, unsigned int cmd, unsigned long arg)
-{
- struct serial_rs485 rs485conf;
-
- switch (cmd) {
- case TIOCSRS485:
- if (copy_from_user(&rs485conf, (void __user *) arg,
- sizeof(rs485conf)))
- return -EFAULT;
- serial_omap_config_rs485(port, &rs485conf);
- break;
-
- case TIOCGRS485:
- if (copy_to_user((void __user *) arg,
- &(to_uart_omap_port(port)->rs485),
- sizeof(rs485conf)))
- return -EFAULT;
- break;
-
- default:
- return -ENOIOCTLCMD;
- }
return 0;
}
-
static struct uart_ops serial_omap_pops = {
.tx_empty = serial_omap_tx_empty,
.set_mctrl = serial_omap_set_mctrl,
@@ -1453,7 +1428,6 @@ static struct uart_ops serial_omap_pops = {
.request_port = serial_omap_request_port,
.config_port = serial_omap_config_port,
.verify_port = serial_omap_verify_port,
- .ioctl = serial_omap_ioctl,
#ifdef CONFIG_CONSOLE_POLL
.poll_put_char = serial_omap_poll_put_char,
.poll_get_char = serial_omap_poll_get_char,
@@ -1587,7 +1561,7 @@ static struct omap_uart_port_info *of_get_uart_port_info(struct device *dev)
static int serial_omap_probe_rs485(struct uart_omap_port *up,
struct device_node *np)
{
- struct serial_rs485 *rs485conf = &up->rs485;
+ struct serial_rs485 *rs485conf = &up->port.rs485;
u32 rs485_delay[2];
enum of_gpio_flags flags;
int ret;
@@ -1702,6 +1676,7 @@ static int serial_omap_probe(struct platform_device *pdev)
up->port.membase = base;
up->port.flags = omap_up_info->flags;
up->port.uartclk = omap_up_info->uartclk;
+ up->port.rs485_config = serial_omap_config_rs485;
if (!up->port.uartclk) {
up->port.uartclk = DEFAULT_CLK_SPEED;
dev_warn(&pdev->dev,
--
2.1.1
--
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