* - S3C2410 and S3C2440 serial support
* - Power Management support
* - Fix console via IrDA devices
- * - SysReq (Herbert Pötzl)
- * - Break character handling (Herbert Pötzl)
+ * - SysReq (Herbert Pötzl)
+ * - Break character handling (Herbert Pötzl)
* - spin-lock initialisation (Dimitry Andric)
* - added clock control
* - updated init code to use platform_device info
* BJD, 04-Nov-2004
*/
-#include <linux/config.h>
#if defined(CONFIG_SERIAL_S3C2410_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
#define SUPPORT_SYSRQ
#include <linux/module.h>
#include <linux/ioport.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/init.h>
#include <linux/sysrq.h>
#include <linux/console.h>
#include <linux/serial_core.h>
#include <linux/serial.h>
#include <linux/delay.h>
+#include <linux/clk.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/hardware.h>
-#include <asm/hardware/clock.h>
-#include <asm/arch/regs-serial.h>
+#include <asm/plat-s3c/regs-serial.h>
#include <asm/arch/regs-gpio.h>
/* structures */
/* UART name and device definitions */
#define S3C24XX_SERIAL_NAME "ttySAC"
-#define S3C24XX_SERIAL_DEVFS "tts/"
#define S3C24XX_SERIAL_MAJOR 204
#define S3C24XX_SERIAL_MINOR 64
/* we can support 3 uarts, but not always use them */
+#ifdef CONFIG_CPU_S3C2400
+#define NR_PORTS (2)
+#else
#define NR_PORTS (3)
+#endif
/* port irq numbers */
#define S3C2410_UERSTAT_PARITY (0x1000)
static irqreturn_t
-s3c24xx_serial_rx_chars(int irq, void *dev_id, struct pt_regs *regs)
+s3c24xx_serial_rx_chars(int irq, void *dev_id)
{
struct s3c24xx_uart_port *ourport = dev_id;
struct uart_port *port = &ourport->port;
if (s3c24xx_serial_rx_fifocnt(ourport, ufstat) == 0)
break;
- if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
- if (tty->low_latency)
- tty_flip_buffer_push(tty);
-
- /*
- * If this failed then we will throw away the
- * bytes but must do so to clear interrupts
- */
- }
-
uerstat = rd_regl(port, S3C2410_UERSTAT);
ch = rd_regb(port, S3C2410_URXH);
flag = TTY_FRAME;
}
- if (uart_handle_sysrq_char(port, ch, regs))
+ if (uart_handle_sysrq_char(port, ch))
goto ignore_char;
uart_insert_char(port, uerstat, S3C2410_UERSTAT_OVERRUN, ch, flag);
return IRQ_HANDLED;
}
-static irqreturn_t s3c24xx_serial_tx_chars(int irq, void *id, struct pt_regs *regs)
+static irqreturn_t s3c24xx_serial_tx_chars(int irq, void *id)
{
struct s3c24xx_uart_port *ourport = id;
struct uart_port *port = &ourport->port;
}
static void s3c24xx_serial_set_termios(struct uart_port *port,
- struct termios *termios,
- struct termios *old)
+ struct ktermios *termios,
+ struct ktermios *old)
{
struct s3c2410_uartcfg *cfg = s3c24xx_port_to_cfg(port);
struct s3c24xx_uart_port *ourport = to_ourport(port);
- struct s3c24xx_uart_clksrc *clksrc;
- struct clk *clk;
+ struct s3c24xx_uart_clksrc *clksrc = NULL;
+ struct clk *clk = NULL;
unsigned long flags;
unsigned int baud, quot;
unsigned int ulcon;
if (ourport->baudclk != NULL && !IS_ERR(ourport->baudclk)) {
clk_disable(ourport->baudclk);
- clk_unuse(ourport->baudclk);
ourport->baudclk = NULL;
}
- clk_use(clk);
clk_enable(clk);
ourport->clksrc = clksrc;
return "S3C2410";
case PORT_S3C2440:
return "S3C2440";
+ case PORT_S3C2412:
+ return "S3C2412";
default:
return NULL;
}
.nr = 3,
.cons = S3C24XX_SERIAL_CONSOLE,
.driver_name = S3C24XX_SERIAL_NAME,
- .devfs_name = S3C24XX_SERIAL_DEVFS,
.major = S3C24XX_SERIAL_MAJOR,
.minor = S3C24XX_SERIAL_MINOR,
};
static struct s3c24xx_uart_port s3c24xx_serial_ports[NR_PORTS] = {
[0] = {
.port = {
- .lock = SPIN_LOCK_UNLOCKED,
+ .lock = __SPIN_LOCK_UNLOCKED(s3c24xx_serial_ports[0].port.lock),
.iotype = UPIO_MEM,
.irq = IRQ_S3CUART_RX0,
.uartclk = 0,
},
[1] = {
.port = {
- .lock = SPIN_LOCK_UNLOCKED,
+ .lock = __SPIN_LOCK_UNLOCKED(s3c24xx_serial_ports[1].port.lock),
.iotype = UPIO_MEM,
.irq = IRQ_S3CUART_RX1,
.uartclk = 0,
[2] = {
.port = {
- .lock = SPIN_LOCK_UNLOCKED,
+ .lock = __SPIN_LOCK_UNLOCKED(s3c24xx_serial_ports[2].port.lock),
.iotype = UPIO_MEM,
.irq = IRQ_S3CUART_RX2,
.uartclk = 0,
dbg("resource %p (%lx..%lx)\n", res, res->start, res->end);
port->mapbase = res->start;
- port->membase = S3C24XX_VA_UART + (res->start - S3C2410_PA_UART);
+ port->membase = S3C24XX_VA_UART + (res->start - S3C24XX_PA_UART);
port->irq = platform_get_irq(platdev, 0);
+ if (port->irq < 0)
+ port->irq = 0;
ourport->clk = clk_get(&platdev->dev, "uart");
- if (ourport->clk != NULL && !IS_ERR(ourport->clk))
- clk_use(ourport->clk);
-
dbg("port: map=%08x, mem=%08x, irq=%d, clock=%ld\n",
port->mapbase, port->membase, port->irq, port->uartclk);
static int probe_index = 0;
-int s3c24xx_serial_probe(struct device *_dev,
- struct s3c24xx_uart_info *info)
+static int s3c24xx_serial_probe(struct platform_device *dev,
+ struct s3c24xx_uart_info *info)
{
struct s3c24xx_uart_port *ourport;
- struct platform_device *dev = to_platform_device(_dev);
int ret;
- dbg("s3c24xx_serial_probe(%p, %p) %d\n", _dev, info, probe_index);
+ dbg("s3c24xx_serial_probe(%p, %p) %d\n", dev, info, probe_index);
ourport = &s3c24xx_serial_ports[probe_index];
probe_index++;
dbg("%s: adding port\n", __FUNCTION__);
uart_add_one_port(&s3c24xx_uart_drv, &ourport->port);
- dev_set_drvdata(_dev, &ourport->port);
+ platform_set_drvdata(dev, &ourport->port);
return 0;
return ret;
}
-int s3c24xx_serial_remove(struct device *_dev)
+static int s3c24xx_serial_remove(struct platform_device *dev)
{
- struct uart_port *port = s3c24xx_dev_to_port(_dev);
+ struct uart_port *port = s3c24xx_dev_to_port(&dev->dev);
if (port)
uart_remove_one_port(&s3c24xx_uart_drv, port);
#ifdef CONFIG_PM
-int s3c24xx_serial_suspend(struct device *dev, pm_message_t state, u32 level)
+static int s3c24xx_serial_suspend(struct platform_device *dev, pm_message_t state)
{
- struct uart_port *port = s3c24xx_dev_to_port(dev);
+ struct uart_port *port = s3c24xx_dev_to_port(&dev->dev);
- if (port && level == SUSPEND_DISABLE)
+ if (port)
uart_suspend_port(&s3c24xx_uart_drv, port);
return 0;
}
-int s3c24xx_serial_resume(struct device *dev, u32 level)
+static int s3c24xx_serial_resume(struct platform_device *dev)
{
- struct uart_port *port = s3c24xx_dev_to_port(dev);
+ struct uart_port *port = s3c24xx_dev_to_port(&dev->dev);
struct s3c24xx_uart_port *ourport = to_ourport(port);
- if (port && level == RESUME_ENABLE) {
+ if (port) {
clk_enable(ourport->clk);
s3c24xx_serial_resetport(port, s3c24xx_port_to_cfg(port));
clk_disable(ourport->clk);
#define s3c24xx_serial_resume NULL
#endif
-int s3c24xx_serial_init(struct device_driver *drv,
- struct s3c24xx_uart_info *info)
+static int s3c24xx_serial_init(struct platform_driver *drv,
+ struct s3c24xx_uart_info *info)
{
dbg("s3c24xx_serial_init(%p,%p)\n", drv, info);
- return driver_register(drv);
+ return platform_driver_register(drv);
}
.reset_port = s3c2400_serial_resetport,
};
-static int s3c2400_serial_probe(struct device *dev)
+static int s3c2400_serial_probe(struct platform_device *dev)
{
return s3c24xx_serial_probe(dev, &s3c2400_uart_inf);
}
-static struct device_driver s3c2400_serial_drv = {
- .name = "s3c2400-uart",
- .bus = &platform_bus_type,
+static struct platform_driver s3c2400_serial_drv = {
.probe = s3c2400_serial_probe,
.remove = s3c24xx_serial_remove,
.suspend = s3c24xx_serial_suspend,
.resume = s3c24xx_serial_resume,
+ .driver = {
+ .name = "s3c2400-uart",
+ .owner = THIS_MODULE,
+ },
};
static inline int s3c2400_serial_init(void)
static inline void s3c2400_serial_exit(void)
{
- driver_unregister(&s3c2400_serial_drv);
+ platform_driver_unregister(&s3c2400_serial_drv);
}
#define s3c2400_uart_inf_at &s3c2400_uart_inf
/* device management */
-static int s3c2410_serial_probe(struct device *dev)
+static int s3c2410_serial_probe(struct platform_device *dev)
{
return s3c24xx_serial_probe(dev, &s3c2410_uart_inf);
}
-static struct device_driver s3c2410_serial_drv = {
- .name = "s3c2410-uart",
- .bus = &platform_bus_type,
+static struct platform_driver s3c2410_serial_drv = {
.probe = s3c2410_serial_probe,
.remove = s3c24xx_serial_remove,
.suspend = s3c24xx_serial_suspend,
.resume = s3c24xx_serial_resume,
+ .driver = {
+ .name = "s3c2410-uart",
+ .owner = THIS_MODULE,
+ },
};
static inline int s3c2410_serial_init(void)
static inline void s3c2410_serial_exit(void)
{
- driver_unregister(&s3c2410_serial_drv);
+ platform_driver_unregister(&s3c2410_serial_drv);
}
#define s3c2410_uart_inf_at &s3c2410_uart_inf
#endif /* CONFIG_CPU_S3C2410 */
-#ifdef CONFIG_CPU_S3C2440
+#if defined(CONFIG_CPU_S3C2440) || defined(CONFIG_CPU_S3C2442)
static int s3c2440_serial_setsource(struct uart_port *port,
struct s3c24xx_uart_clksrc *clk)
/* device management */
-static int s3c2440_serial_probe(struct device *dev)
+static int s3c2440_serial_probe(struct platform_device *dev)
{
dbg("s3c2440_serial_probe: dev=%p\n", dev);
return s3c24xx_serial_probe(dev, &s3c2440_uart_inf);
}
-static struct device_driver s3c2440_serial_drv = {
- .name = "s3c2440-uart",
- .bus = &platform_bus_type,
+static struct platform_driver s3c2440_serial_drv = {
.probe = s3c2440_serial_probe,
.remove = s3c24xx_serial_remove,
.suspend = s3c24xx_serial_suspend,
.resume = s3c24xx_serial_resume,
+ .driver = {
+ .name = "s3c2440-uart",
+ .owner = THIS_MODULE,
+ },
};
static inline void s3c2440_serial_exit(void)
{
- driver_unregister(&s3c2440_serial_drv);
+ platform_driver_unregister(&s3c2440_serial_drv);
}
#define s3c2440_uart_inf_at &s3c2440_uart_inf
#define s3c2440_uart_inf_at NULL
#endif /* CONFIG_CPU_S3C2440 */
+#if defined(CONFIG_CPU_S3C2412)
+
+static int s3c2412_serial_setsource(struct uart_port *port,
+ struct s3c24xx_uart_clksrc *clk)
+{
+ unsigned long ucon = rd_regl(port, S3C2410_UCON);
+
+ ucon &= ~S3C2412_UCON_CLKMASK;
+
+ if (strcmp(clk->name, "uclk") == 0)
+ ucon |= S3C2440_UCON_UCLK;
+ else if (strcmp(clk->name, "pclk") == 0)
+ ucon |= S3C2440_UCON_PCLK;
+ else if (strcmp(clk->name, "usysclk") == 0)
+ ucon |= S3C2412_UCON_USYSCLK;
+ else {
+ printk(KERN_ERR "unknown clock source %s\n", clk->name);
+ return -EINVAL;
+ }
+
+ wr_regl(port, S3C2410_UCON, ucon);
+ return 0;
+}
+
+
+static int s3c2412_serial_getsource(struct uart_port *port,
+ struct s3c24xx_uart_clksrc *clk)
+{
+ unsigned long ucon = rd_regl(port, S3C2410_UCON);
+
+ switch (ucon & S3C2412_UCON_CLKMASK) {
+ case S3C2412_UCON_UCLK:
+ clk->divisor = 1;
+ clk->name = "uclk";
+ break;
+
+ case S3C2412_UCON_PCLK:
+ case S3C2412_UCON_PCLK2:
+ clk->divisor = 1;
+ clk->name = "pclk";
+ break;
+
+ case S3C2412_UCON_USYSCLK:
+ clk->divisor = 1;
+ clk->name = "usysclk";
+ break;
+ }
+
+ return 0;
+}
+
+static int s3c2412_serial_resetport(struct uart_port *port,
+ struct s3c2410_uartcfg *cfg)
+{
+ unsigned long ucon = rd_regl(port, S3C2410_UCON);
+
+ dbg("%s: port=%p (%08lx), cfg=%p\n",
+ __FUNCTION__, port, port->mapbase, cfg);
+
+ /* ensure we don't change the clock settings... */
+
+ ucon &= S3C2412_UCON_CLKMASK;
+
+ wr_regl(port, S3C2410_UCON, ucon | cfg->ucon);
+ wr_regl(port, S3C2410_ULCON, cfg->ulcon);
+
+ /* reset both fifos */
+
+ wr_regl(port, S3C2410_UFCON, cfg->ufcon | S3C2410_UFCON_RESETBOTH);
+ wr_regl(port, S3C2410_UFCON, cfg->ufcon);
+
+ return 0;
+}
+
+static struct s3c24xx_uart_info s3c2412_uart_inf = {
+ .name = "Samsung S3C2412 UART",
+ .type = PORT_S3C2412,
+ .fifosize = 64,
+ .rx_fifomask = S3C2440_UFSTAT_RXMASK,
+ .rx_fifoshift = S3C2440_UFSTAT_RXSHIFT,
+ .rx_fifofull = S3C2440_UFSTAT_RXFULL,
+ .tx_fifofull = S3C2440_UFSTAT_TXFULL,
+ .tx_fifomask = S3C2440_UFSTAT_TXMASK,
+ .tx_fifoshift = S3C2440_UFSTAT_TXSHIFT,
+ .get_clksrc = s3c2412_serial_getsource,
+ .set_clksrc = s3c2412_serial_setsource,
+ .reset_port = s3c2412_serial_resetport,
+};
+
+/* device management */
+
+static int s3c2412_serial_probe(struct platform_device *dev)
+{
+ dbg("s3c2440_serial_probe: dev=%p\n", dev);
+ return s3c24xx_serial_probe(dev, &s3c2412_uart_inf);
+}
+
+static struct platform_driver s3c2412_serial_drv = {
+ .probe = s3c2412_serial_probe,
+ .remove = s3c24xx_serial_remove,
+ .suspend = s3c24xx_serial_suspend,
+ .resume = s3c24xx_serial_resume,
+ .driver = {
+ .name = "s3c2412-uart",
+ .owner = THIS_MODULE,
+ },
+};
+
+
+static inline int s3c2412_serial_init(void)
+{
+ return s3c24xx_serial_init(&s3c2412_serial_drv, &s3c2412_uart_inf);
+}
+
+static inline void s3c2412_serial_exit(void)
+{
+ platform_driver_unregister(&s3c2412_serial_drv);
+}
+
+#define s3c2412_uart_inf_at &s3c2412_uart_inf
+#else
+
+static inline int s3c2412_serial_init(void)
+{
+ return 0;
+}
+
+static inline void s3c2412_serial_exit(void)
+{
+}
+
+#define s3c2412_uart_inf_at NULL
+#endif /* CONFIG_CPU_S3C2440 */
+
+
/* module initialisation code */
static int __init s3c24xx_serial_modinit(void)
s3c2400_serial_init();
s3c2410_serial_init();
+ s3c2412_serial_init();
s3c2440_serial_init();
return 0;
{
s3c2400_serial_exit();
s3c2410_serial_exit();
+ s3c2412_serial_exit();
s3c2440_serial_exit();
uart_unregister_driver(&s3c24xx_uart_drv);
}
static void
-s3c24xx_serial_console_write(struct console *co, const char *s,
- unsigned int count)
+s3c24xx_serial_console_putchar(struct uart_port *port, int ch)
{
- int i;
unsigned int ufcon = rd_regl(cons_uart, S3C2410_UFCON);
+ while (!s3c24xx_serial_console_txrdy(port, ufcon))
+ barrier();
+ wr_regb(cons_uart, S3C2410_UTXH, ch);
+}
- for (i = 0; i < count; i++) {
- while (!s3c24xx_serial_console_txrdy(cons_uart, ufcon))
- barrier();
-
- wr_regb(cons_uart, S3C2410_UTXH, s[i]);
-
- if (s[i] == '\n') {
- while (!s3c24xx_serial_console_txrdy(cons_uart, ufcon))
- barrier();
-
- wr_regb(cons_uart, S3C2410_UTXH, '\r');
- }
- }
+static void
+s3c24xx_serial_console_write(struct console *co, const char *s,
+ unsigned int count)
+{
+ uart_console_write(cons_uart, s, count, s3c24xx_serial_console_putchar);
}
static void __init
info = s3c2410_uart_inf_at;
} else if (strcmp(dev->name, "s3c2440-uart") == 0) {
info = s3c2440_uart_inf_at;
+ } else if (strcmp(dev->name, "s3c2412-uart") == 0) {
+ info = s3c2412_uart_inf_at;
} else {
printk(KERN_ERR "s3c24xx: no driver for %s\n", dev->name);
return 0;
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
-MODULE_DESCRIPTION("Samsung S3C2410/S3C2440 Serial port driver");
+MODULE_DESCRIPTION("Samsung S3C2410/S3C2440/S3C2412 Serial port driver");
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff