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path: root/drivers/tty/serial/samsung.c
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Diffstat (limited to 'drivers/tty/serial/samsung.c')
-rw-r--r--drivers/tty/serial/samsung.c147
1 files changed, 74 insertions, 73 deletions
diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c
index c78f43a481ce..107e80722575 100644
--- a/drivers/tty/serial/samsung.c
+++ b/drivers/tty/serial/samsung.c
@@ -199,12 +199,14 @@ static void s3c24xx_serial_stop_rx(struct uart_port *port)
}
}
-static inline struct s3c24xx_uart_info *s3c24xx_port_to_info(struct uart_port *port)
+static inline struct s3c24xx_uart_info
+ *s3c24xx_port_to_info(struct uart_port *port)
{
return to_ourport(port)->info;
}
-static inline struct s3c2410_uartcfg *s3c24xx_port_to_cfg(struct uart_port *port)
+static inline struct s3c2410_uartcfg
+ *s3c24xx_port_to_cfg(struct uart_port *port)
{
struct s3c24xx_uart_port *ourport;
@@ -237,7 +239,7 @@ s3c24xx_serial_rx_chars(int irq, void *dev_id)
struct uart_port *port = &ourport->port;
unsigned int ufcon, ch, flag, ufstat, uerstat;
unsigned long flags;
- int max_count = 64;
+ int max_count = port->fifosize;
spin_lock_irqsave(&port->lock, flags);
@@ -311,14 +313,14 @@ s3c24xx_serial_rx_chars(int irq, void *dev_id)
uart_insert_char(port, uerstat, S3C2410_UERSTAT_OVERRUN,
ch, flag);
- ignore_char:
+ignore_char:
continue;
}
spin_unlock_irqrestore(&port->lock, flags);
tty_flip_buffer_push(&port->state->port);
- out:
+out:
return IRQ_HANDLED;
}
@@ -328,7 +330,7 @@ static irqreturn_t s3c24xx_serial_tx_chars(int irq, void *id)
struct uart_port *port = &ourport->port;
struct circ_buf *xmit = &port->state->xmit;
unsigned long flags;
- int count = 256;
+ int count = port->fifosize;
spin_lock_irqsave(&port->lock, flags);
@@ -368,7 +370,7 @@ static irqreturn_t s3c24xx_serial_tx_chars(int irq, void *id)
if (uart_circ_empty(xmit))
s3c24xx_serial_stop_tx(port);
- out:
+out:
spin_unlock_irqrestore(&port->lock, flags);
return IRQ_HANDLED;
}
@@ -519,7 +521,7 @@ static int s3c24xx_serial_startup(struct uart_port *port)
return ret;
- err:
+err:
s3c24xx_serial_shutdown(port);
return ret;
}
@@ -559,11 +561,15 @@ static void s3c24xx_serial_pm(struct uart_port *port, unsigned int level,
unsigned int old)
{
struct s3c24xx_uart_port *ourport = to_ourport(port);
+ int timeout = 10000;
ourport->pm_level = level;
switch (level) {
case 3:
+ while (--timeout && !s3c24xx_serial_txempty_nofifo(port))
+ udelay(100);
+
if (!IS_ERR(ourport->baudclk))
clk_disable_unprepare(ourport->baudclk);
@@ -841,8 +847,8 @@ static void s3c24xx_serial_set_termios(struct uart_port *port,
*/
port->read_status_mask = S3C2410_UERSTAT_OVERRUN;
if (termios->c_iflag & INPCK)
- port->read_status_mask |= S3C2410_UERSTAT_FRAME | S3C2410_UERSTAT_PARITY;
-
+ port->read_status_mask |= S3C2410_UERSTAT_FRAME |
+ S3C2410_UERSTAT_PARITY;
/*
* Which character status flags should we ignore?
*/
@@ -969,10 +975,13 @@ static struct uart_driver s3c24xx_uart_drv = {
.minor = S3C24XX_SERIAL_MINOR,
};
-static struct s3c24xx_uart_port s3c24xx_serial_ports[CONFIG_SERIAL_SAMSUNG_UARTS] = {
+#define __PORT_LOCK_UNLOCKED(i) \
+ __SPIN_LOCK_UNLOCKED(s3c24xx_serial_ports[i].port.lock)
+static struct s3c24xx_uart_port
+s3c24xx_serial_ports[CONFIG_SERIAL_SAMSUNG_UARTS] = {
[0] = {
.port = {
- .lock = __SPIN_LOCK_UNLOCKED(s3c24xx_serial_ports[0].port.lock),
+ .lock = __PORT_LOCK_UNLOCKED(0),
.iotype = UPIO_MEM,
.uartclk = 0,
.fifosize = 16,
@@ -983,7 +992,7 @@ static struct s3c24xx_uart_port s3c24xx_serial_ports[CONFIG_SERIAL_SAMSUNG_UARTS
},
[1] = {
.port = {
- .lock = __SPIN_LOCK_UNLOCKED(s3c24xx_serial_ports[1].port.lock),
+ .lock = __PORT_LOCK_UNLOCKED(1),
.iotype = UPIO_MEM,
.uartclk = 0,
.fifosize = 16,
@@ -996,7 +1005,7 @@ static struct s3c24xx_uart_port s3c24xx_serial_ports[CONFIG_SERIAL_SAMSUNG_UARTS
[2] = {
.port = {
- .lock = __SPIN_LOCK_UNLOCKED(s3c24xx_serial_ports[2].port.lock),
+ .lock = __PORT_LOCK_UNLOCKED(2),
.iotype = UPIO_MEM,
.uartclk = 0,
.fifosize = 16,
@@ -1009,7 +1018,7 @@ static struct s3c24xx_uart_port s3c24xx_serial_ports[CONFIG_SERIAL_SAMSUNG_UARTS
#if CONFIG_SERIAL_SAMSUNG_UARTS > 3
[3] = {
.port = {
- .lock = __SPIN_LOCK_UNLOCKED(s3c24xx_serial_ports[3].port.lock),
+ .lock = __PORT_LOCK_UNLOCKED(3),
.iotype = UPIO_MEM,
.uartclk = 0,
.fifosize = 16,
@@ -1020,6 +1029,7 @@ static struct s3c24xx_uart_port s3c24xx_serial_ports[CONFIG_SERIAL_SAMSUNG_UARTS
}
#endif
};
+#undef __PORT_LOCK_UNLOCKED
/* s3c24xx_serial_resetport
*
@@ -1102,11 +1112,12 @@ static int s3c24xx_serial_cpufreq_transition(struct notifier_block *nb,
s3c24xx_serial_set_termios(uport, termios, NULL);
}
- exit:
+exit:
return 0;
}
-static inline int s3c24xx_serial_cpufreq_register(struct s3c24xx_uart_port *port)
+static inline int
+s3c24xx_serial_cpufreq_register(struct s3c24xx_uart_port *port)
{
port->freq_transition.notifier_call = s3c24xx_serial_cpufreq_transition;
@@ -1114,19 +1125,22 @@ static inline int s3c24xx_serial_cpufreq_register(struct s3c24xx_uart_port *port
CPUFREQ_TRANSITION_NOTIFIER);
}
-static inline void s3c24xx_serial_cpufreq_deregister(struct s3c24xx_uart_port *port)
+static inline void
+s3c24xx_serial_cpufreq_deregister(struct s3c24xx_uart_port *port)
{
cpufreq_unregister_notifier(&port->freq_transition,
CPUFREQ_TRANSITION_NOTIFIER);
}
#else
-static inline int s3c24xx_serial_cpufreq_register(struct s3c24xx_uart_port *port)
+static inline int
+s3c24xx_serial_cpufreq_register(struct s3c24xx_uart_port *port)
{
return 0;
}
-static inline void s3c24xx_serial_cpufreq_deregister(struct s3c24xx_uart_port *port)
+static inline void
+s3c24xx_serial_cpufreq_deregister(struct s3c24xx_uart_port *port)
{
}
#endif
@@ -1226,24 +1240,6 @@ static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport,
return 0;
}
-#ifdef CONFIG_SAMSUNG_CLOCK
-static ssize_t s3c24xx_serial_show_clksrc(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct uart_port *port = s3c24xx_dev_to_port(dev);
- struct s3c24xx_uart_port *ourport = to_ourport(port);
-
- if (IS_ERR(ourport->baudclk))
- return -EINVAL;
-
- return snprintf(buf, PAGE_SIZE, "* %s\n",
- ourport->baudclk->name ?: "(null)");
-}
-
-static DEVICE_ATTR(clock_source, S_IRUGO, s3c24xx_serial_show_clksrc, NULL);
-#endif
-
/* Device driver serial port probe */
static const struct of_device_id s3c24xx_uart_dt_match[];
@@ -1296,11 +1292,10 @@ static int s3c24xx_serial_probe(struct platform_device *pdev)
of_property_read_u32(np,
"samsung,uart-fifosize", &ourport->port.fifosize);
- if (!ourport->port.fifosize) {
- ourport->port.fifosize = (ourport->info->fifosize) ?
- ourport->info->fifosize :
- ourport->drv_data->fifosize[index];
- }
+ if (ourport->drv_data->fifosize[index])
+ ourport->port.fifosize = ourport->drv_data->fifosize[index];
+ else if (ourport->info->fifosize)
+ ourport->port.fifosize = ourport->info->fifosize;
probe_index++;
@@ -1329,12 +1324,6 @@ static int s3c24xx_serial_probe(struct platform_device *pdev)
*/
clk_disable_unprepare(ourport->clk);
-#ifdef CONFIG_SAMSUNG_CLOCK
- ret = device_create_file(&pdev->dev, &dev_attr_clock_source);
- if (ret < 0)
- dev_err(&pdev->dev, "failed to add clock source attr.\n");
-#endif
-
ret = s3c24xx_serial_cpufreq_register(ourport);
if (ret < 0)
dev_err(&pdev->dev, "failed to add cpufreq notifier\n");
@@ -1348,9 +1337,6 @@ static int s3c24xx_serial_remove(struct platform_device *dev)
if (port) {
s3c24xx_serial_cpufreq_deregister(to_ourport(port));
-#ifdef CONFIG_SAMSUNG_CLOCK
- device_remove_file(&dev->dev, &dev_attr_clock_source);
-#endif
uart_remove_one_port(&s3c24xx_uart_drv, port);
}
@@ -1771,32 +1757,43 @@ static struct s3c24xx_serial_drv_data s5pv210_serial_drv_data = {
#endif
#if defined(CONFIG_ARCH_EXYNOS)
+#define EXYNOS_COMMON_SERIAL_DRV_DATA \
+ .info = &(struct s3c24xx_uart_info) { \
+ .name = "Samsung Exynos UART", \
+ .type = PORT_S3C6400, \
+ .has_divslot = 1, \
+ .rx_fifomask = S5PV210_UFSTAT_RXMASK, \
+ .rx_fifoshift = S5PV210_UFSTAT_RXSHIFT, \
+ .rx_fifofull = S5PV210_UFSTAT_RXFULL, \
+ .tx_fifofull = S5PV210_UFSTAT_TXFULL, \
+ .tx_fifomask = S5PV210_UFSTAT_TXMASK, \
+ .tx_fifoshift = S5PV210_UFSTAT_TXSHIFT, \
+ .def_clk_sel = S3C2410_UCON_CLKSEL0, \
+ .num_clks = 1, \
+ .clksel_mask = 0, \
+ .clksel_shift = 0, \
+ }, \
+ .def_cfg = &(struct s3c2410_uartcfg) { \
+ .ucon = S5PV210_UCON_DEFAULT, \
+ .ufcon = S5PV210_UFCON_DEFAULT, \
+ .has_fracval = 1, \
+ } \
+
static struct s3c24xx_serial_drv_data exynos4210_serial_drv_data = {
- .info = &(struct s3c24xx_uart_info) {
- .name = "Samsung Exynos4 UART",
- .type = PORT_S3C6400,
- .has_divslot = 1,
- .rx_fifomask = S5PV210_UFSTAT_RXMASK,
- .rx_fifoshift = S5PV210_UFSTAT_RXSHIFT,
- .rx_fifofull = S5PV210_UFSTAT_RXFULL,
- .tx_fifofull = S5PV210_UFSTAT_TXFULL,
- .tx_fifomask = S5PV210_UFSTAT_TXMASK,
- .tx_fifoshift = S5PV210_UFSTAT_TXSHIFT,
- .def_clk_sel = S3C2410_UCON_CLKSEL0,
- .num_clks = 1,
- .clksel_mask = 0,
- .clksel_shift = 0,
- },
- .def_cfg = &(struct s3c2410_uartcfg) {
- .ucon = S5PV210_UCON_DEFAULT,
- .ufcon = S5PV210_UFCON_DEFAULT,
- .has_fracval = 1,
- },
+ EXYNOS_COMMON_SERIAL_DRV_DATA,
.fifosize = { 256, 64, 16, 16 },
};
+
+static struct s3c24xx_serial_drv_data exynos5433_serial_drv_data = {
+ EXYNOS_COMMON_SERIAL_DRV_DATA,
+ .fifosize = { 64, 256, 16, 256 },
+};
+
#define EXYNOS4210_SERIAL_DRV_DATA ((kernel_ulong_t)&exynos4210_serial_drv_data)
+#define EXYNOS5433_SERIAL_DRV_DATA ((kernel_ulong_t)&exynos5433_serial_drv_data)
#else
#define EXYNOS4210_SERIAL_DRV_DATA (kernel_ulong_t)NULL
+#define EXYNOS5433_SERIAL_DRV_DATA (kernel_ulong_t)NULL
#endif
static struct platform_device_id s3c24xx_serial_driver_ids[] = {
@@ -1818,6 +1815,9 @@ static struct platform_device_id s3c24xx_serial_driver_ids[] = {
}, {
.name = "exynos4210-uart",
.driver_data = EXYNOS4210_SERIAL_DRV_DATA,
+ }, {
+ .name = "exynos5433-uart",
+ .driver_data = EXYNOS5433_SERIAL_DRV_DATA,
},
{ },
};
@@ -1837,6 +1837,8 @@ static const struct of_device_id s3c24xx_uart_dt_match[] = {
.data = (void *)S5PV210_SERIAL_DRV_DATA },
{ .compatible = "samsung,exynos4210-uart",
.data = (void *)EXYNOS4210_SERIAL_DRV_DATA },
+ { .compatible = "samsung,exynos5433-uart",
+ .data = (void *)EXYNOS5433_SERIAL_DRV_DATA },
{},
};
MODULE_DEVICE_TABLE(of, s3c24xx_uart_dt_match);
@@ -1848,7 +1850,6 @@ static struct platform_driver samsung_serial_driver = {
.id_table = s3c24xx_serial_driver_ids,
.driver = {
.name = "samsung-uart",
- .owner = THIS_MODULE,
.pm = SERIAL_SAMSUNG_PM_OPS,
.of_match_table = of_match_ptr(s3c24xx_uart_dt_match),
},
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.