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path: root/drivers/tty/serial/omap-serial.c
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Diffstat (limited to 'drivers/tty/serial/omap-serial.c')
-rw-r--r--drivers/tty/serial/omap-serial.c93
1 files changed, 35 insertions, 58 deletions
diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index 18c30cabe27f..435478a245d3 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -46,7 +46,7 @@
#include <dt-bindings/gpio/gpio.h>
-#define OMAP_MAX_HSUART_PORTS 6
+#define OMAP_MAX_HSUART_PORTS 10
#define UART_BUILD_REVISION(x, y) (((x) << 8) | (y))
@@ -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
@@ -327,10 +326,12 @@ 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);
+ if (port->rs485.delay_rts_after_send > 0)
+ mdelay(
+ port->rs485.delay_rts_after_send);
gpio_set_value(up->rts_gpio, res);
}
} else {
@@ -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);
@@ -1355,16 +1356,14 @@ 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);
- unsigned long flags;
unsigned int mode;
int val;
pm_runtime_get_sync(up->dev);
- spin_lock_irqsave(&up->port.lock, flags);
/* Disable interrupts from this port */
mode = up->ier;
@@ -1372,7 +1371,7 @@ 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 +1379,12 @@ 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;
@@ -1394,45 +1393,18 @@ 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);
}
- 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 +1425,6 @@ 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 +1558,7 @@ 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;
@@ -1682,14 +1653,21 @@ static int serial_omap_probe(struct platform_device *pdev)
up->port.ops = &serial_omap_pops;
if (pdev->dev.of_node)
- up->port.line = of_alias_get_id(pdev->dev.of_node, "serial");
+ ret = of_alias_get_id(pdev->dev.of_node, "serial");
else
- up->port.line = pdev->id;
+ ret = pdev->id;
- if (up->port.line < 0) {
+ if (ret < 0) {
dev_err(&pdev->dev, "failed to get alias/pdev id, errno %d\n",
- up->port.line);
- ret = -ENODEV;
+ ret);
+ goto err_port_line;
+ }
+ up->port.line = ret;
+
+ if (up->port.line >= OMAP_MAX_HSUART_PORTS) {
+ dev_err(&pdev->dev, "uart ID %d > MAX %d.\n", up->port.line,
+ OMAP_MAX_HSUART_PORTS);
+ ret = -ENXIO;
goto err_port_line;
}
@@ -1702,6 +1680,7 @@ 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,
@@ -1747,8 +1726,6 @@ err_add_port:
pm_runtime_disable(&pdev->dev);
err_rs485:
err_port_line:
- dev_err(&pdev->dev, "[UART%d]: failure [%s]: %d\n",
- pdev->id, __func__, ret);
return ret;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-27 00:01:45 +0100