X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=drivers%2Fserial%2Fs3c2410.c;h=45de19366030f248dbda1e33d457e8c75cac7e93;hb=f8d9d654fcc7dd87f5d0b222e233eaab15d650c4;hp=036792328d499d4f6286174855897e4bb021ece1;hpb=d052d1beff706920e82c5d55006b08e256b5df09;p=safe%2Fjmp%2Flinux-2.6 diff --git a/drivers/serial/s3c2410.c b/drivers/serial/s3c2410.c index 0367923..45de193 100644 --- a/drivers/serial/s3c2410.c +++ b/drivers/serial/s3c2410.c @@ -20,8 +20,8 @@ * - 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 @@ -55,7 +55,6 @@ * BJD, 04-Nov-2004 */ -#include #if defined(CONFIG_SERIAL_S3C2410_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) #define SUPPORT_SYSRQ @@ -72,14 +71,14 @@ #include #include #include +#include #include #include #include -#include -#include +#include #include /* structures */ @@ -149,7 +148,6 @@ s3c24xx_serial_dbg(const char *fmt, ...) /* 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 @@ -161,7 +159,11 @@ s3c24xx_serial_dbg(const char *fmt, ...) /* 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 */ @@ -308,7 +310,7 @@ static int s3c24xx_serial_rx_fifocnt(struct s3c24xx_uart_port *ourport, #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; @@ -323,16 +325,6 @@ s3c24xx_serial_rx_chars(int irq, void *dev_id, struct pt_regs *regs) 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); @@ -387,7 +379,7 @@ s3c24xx_serial_rx_chars(int irq, void *dev_id, struct pt_regs *regs) 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); @@ -401,7 +393,7 @@ s3c24xx_serial_rx_chars(int irq, void *dev_id, struct pt_regs *regs) 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; @@ -746,8 +738,8 @@ static unsigned int s3c24xx_serial_getclk(struct uart_port *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); @@ -782,11 +774,9 @@ static void s3c24xx_serial_set_termios(struct uart_port *port, 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; @@ -880,6 +870,8 @@ static const char *s3c24xx_serial_type(struct uart_port *port) return "S3C2410"; case PORT_S3C2440: return "S3C2440"; + case PORT_S3C2412: + return "S3C2412"; default: return NULL; } @@ -958,7 +950,6 @@ static struct uart_driver s3c24xx_uart_drv = { .nr = 3, .cons = S3C24XX_SERIAL_CONSOLE, .driver_name = S3C24XX_SERIAL_NAME, - .devfs_name = S3C24XX_SERIAL_DEVFS, .major = S3C24XX_SERIAL_MAJOR, .minor = S3C24XX_SERIAL_MINOR, }; @@ -966,7 +957,7 @@ static struct uart_driver s3c24xx_uart_drv = { 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, @@ -978,7 +969,7 @@ static struct s3c24xx_uart_port s3c24xx_serial_ports[NR_PORTS] = { }, [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, @@ -992,7 +983,7 @@ static struct s3c24xx_uart_port s3c24xx_serial_ports[NR_PORTS] = { [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, @@ -1072,14 +1063,13 @@ static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport, 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); @@ -1092,14 +1082,13 @@ static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport, static int probe_index = 0; -static int s3c24xx_serial_probe(struct device *_dev, +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++; @@ -1112,7 +1101,7 @@ static int s3c24xx_serial_probe(struct device *_dev, 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; @@ -1120,9 +1109,9 @@ static int s3c24xx_serial_probe(struct device *_dev, return ret; } -static 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); @@ -1134,9 +1123,9 @@ static int s3c24xx_serial_remove(struct device *_dev) #ifdef CONFIG_PM -static int s3c24xx_serial_suspend(struct device *dev, pm_message_t state) +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) uart_suspend_port(&s3c24xx_uart_drv, port); @@ -1144,9 +1133,9 @@ static int s3c24xx_serial_suspend(struct device *dev, pm_message_t state) return 0; } -static int s3c24xx_serial_resume(struct device *dev) +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) { @@ -1165,11 +1154,11 @@ static int s3c24xx_serial_resume(struct device *dev) #define s3c24xx_serial_resume NULL #endif -static int s3c24xx_serial_init(struct device_driver *drv, +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); } @@ -1228,19 +1217,20 @@ static struct s3c24xx_uart_info s3c2400_uart_inf = { .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", - .owner = THIS_MODULE, - .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) @@ -1250,7 +1240,7 @@ 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 @@ -1332,19 +1322,20 @@ static struct s3c24xx_uart_info s3c2410_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", - .owner = THIS_MODULE, - .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) @@ -1354,7 +1345,7 @@ 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 @@ -1373,7 +1364,7 @@ static inline void s3c2410_serial_exit(void) #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) @@ -1493,20 +1484,21 @@ static struct s3c24xx_uart_info s3c2440_uart_inf = { /* 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", - .owner = THIS_MODULE, - .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, + }, }; @@ -1517,7 +1509,7 @@ static inline int s3c2440_serial_init(void) 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 @@ -1535,6 +1527,141 @@ static inline void s3c2440_serial_exit(void) #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) @@ -1549,6 +1676,7 @@ static int __init s3c24xx_serial_modinit(void) s3c2400_serial_init(); s3c2410_serial_init(); + s3c2412_serial_init(); s3c2440_serial_init(); return 0; @@ -1558,6 +1686,7 @@ static void __exit s3c24xx_serial_modexit(void) { s3c2400_serial_exit(); s3c2410_serial_exit(); + s3c2412_serial_exit(); s3c2440_serial_exit(); uart_unregister_driver(&s3c24xx_uart_drv); @@ -1593,25 +1722,19 @@ s3c24xx_serial_console_txrdy(struct uart_port *port, unsigned int ufcon) } 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 @@ -1786,6 +1909,8 @@ static int s3c24xx_serial_initconsole(void) 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; @@ -1809,4 +1934,4 @@ console_initcall(s3c24xx_serial_initconsole); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Ben Dooks "); -MODULE_DESCRIPTION("Samsung S3C2410/S3C2440 Serial port driver"); +MODULE_DESCRIPTION("Samsung S3C2410/S3C2440/S3C2412 Serial port driver");