Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-serial

[pandora-kernel.git] / drivers / serial / 8250.c

diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index bbf78aa..cc2a205 100644 (file)
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -19,7 +19,6 @@
  *  mapbase is the physical address of the IO port.
  *  membase is an 'ioremapped' cookie.
  */
-#include <linux/config.h>
 
 #if defined(CONFIG_SERIAL_8250_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
 #define SUPPORT_SYSRQ
@@ -49,7 +48,7 @@
 
 /*
  * Configuration:
- *   share_irqs - whether we pass SA_SHIRQ to request_irq().  This option
+ *   share_irqs - whether we pass IRQF_SHARED to request_irq().  This option
  *                is unsafe when used on edge-triggered interrupts.
  */
 static unsigned int share_irqs = SERIAL8250_SHARE_IRQS;
@@ -300,6 +299,7 @@ static inline int map_8250_out_reg(struct uart_8250_port *up, int offset)
 
 static unsigned int serial_in(struct uart_8250_port *up, int offset)
 {
+       unsigned int tmp;
        offset = map_8250_in_reg(up, offset) << up->port.regshift;
 
        switch (up->port.iotype) {
@@ -318,6 +318,13 @@ static unsigned int serial_in(struct uart_8250_port *up, int offset)
                return __raw_readl(up->port.membase + offset);
 #endif
 
+       case UPIO_TSI:
+               if (offset == UART_IIR) {
+                       tmp = readl(up->port.membase + (UART_IIR & ~3));
+                       return (tmp >> 16) & 0xff; /* UART_IIR % 4 == 2 */
+               } else
+                       return readb(up->port.membase + offset);
+
        default:
                return inb(up->port.iobase + offset);
        }
@@ -347,6 +354,10 @@ serial_out(struct uart_8250_port *up, int offset, int value)
                __raw_writel(value, up->port.membase + offset);
                break;
 #endif
+       case UPIO_TSI:
+               if (!((offset == UART_IER) && (value & UART_IER_UUE)))
+                       writeb(value, up->port.membase + offset);
+               break;
 
        default:
                outb(value, up->port.iobase + offset);
@@ -1401,7 +1412,7 @@ static void serial_do_unlink(struct irq_info *i, struct uart_8250_port *up)
 static int serial_link_irq_chain(struct uart_8250_port *up)
 {
        struct irq_info *i = irq_lists + up->port.irq;
-       int ret, irq_flags = up->port.flags & UPF_SHARE_IRQ ? SA_SHIRQ : 0;
+       int ret, irq_flags = up->port.flags & UPF_SHARE_IRQ ? IRQF_SHARED : 0;
 
        spin_lock_irq(&i->lock);
 
@@ -1885,6 +1896,17 @@ serial8250_set_termios(struct uart_port *port, struct termios *termios,
                serial_outp(up, UART_EFR, efr);
        }
 
+#ifdef CONFIG_ARCH_OMAP15XX
+       /* Workaround to enable 115200 baud on OMAP1510 internal ports */
+       if (cpu_is_omap1510() && is_omap_port((unsigned int)up->port.membase)) {
+               if (baud == 115200) {
+                       quot = 1;
+                       serial_out(up, UART_OMAP_OSC_12M_SEL, 1);
+               } else
+                       serial_out(up, UART_OMAP_OSC_12M_SEL, 0);
+       }
+#endif
+
        if (up->capabilities & UART_NATSEMI) {
                /* Switch to bank 2 not bank 1, to avoid resetting EXCR2 */
                serial_outp(up, UART_LCR, 0xe0);
@@ -1938,6 +1960,8 @@ static int serial8250_request_std_resource(struct uart_8250_port *up)
        case UPIO_AU:
                size = 0x100000;
                /* fall thru */
+       case UPIO_TSI:
+       case UPIO_MEM32:
        case UPIO_MEM:
                if (!up->port.mapbase)
                        break;
@@ -1973,6 +1997,8 @@ static void serial8250_release_std_resource(struct uart_8250_port *up)
        case UPIO_AU:
                size = 0x100000;
                /* fall thru */
+       case UPIO_TSI:
+       case UPIO_MEM32:
        case UPIO_MEM:
                if (!up->port.mapbase)
                        break;
@@ -1996,17 +2022,15 @@ static int serial8250_request_rsa_resource(struct uart_8250_port *up)
 {
        unsigned long start = UART_RSA_BASE << up->port.regshift;
        unsigned int size = 8 << up->port.regshift;
-       int ret = 0;
+       int ret = -EINVAL;
 
        switch (up->port.iotype) {
-       case UPIO_MEM:
-               ret = -EINVAL;
-               break;
-
        case UPIO_HUB6:
        case UPIO_PORT:
                start += up->port.iobase;
-               if (!request_region(start, size, "serial-rsa"))
+               if (request_region(start, size, "serial-rsa"))
+                       ret = 0;
+               else
                        ret = -EBUSY;
                break;
        }
@@ -2020,9 +2044,6 @@ static void serial8250_release_rsa_resource(struct uart_8250_port *up)
        unsigned int size = 8 << up->port.regshift;
 
        switch (up->port.iotype) {
-       case UPIO_MEM:
-               break;
-
        case UPIO_HUB6:
        case UPIO_PORT:
                release_region(up->port.iobase + offset, size);
@@ -2211,9 +2232,10 @@ static inline void wait_for_xmitr(struct uart_8250_port *up, int bits)
        /* Wait up to 1s for flow control if necessary */
        if (up->port.flags & UPF_CONS_FLOW) {
                tmout = 1000000;
-               while (--tmout &&
-                      ((serial_in(up, UART_MSR) & UART_MSR_CTS) == 0))
+               while (!(serial_in(up, UART_MSR) & UART_MSR_CTS) && --tmout) {
                        udelay(1);
+                       touch_nmi_watchdog();
+               }
        }
 }
 
@@ -2241,10 +2263,14 @@ serial8250_console_write(struct console *co, const char *s, unsigned int count)
 
        touch_nmi_watchdog();
 
-       if (oops_in_progress) {
-               locked = spin_trylock_irqsave(&up->port.lock, flags);
+       local_irq_save(flags);
+       if (up->port.sysrq) {
+               /* serial8250_handle_port() already took the lock */
+               locked = 0;
+       } else if (oops_in_progress) {
+               locked = spin_trylock(&up->port.lock);
        } else
-               spin_lock_irqsave(&up->port.lock, flags);
+               spin_lock(&up->port.lock);
 
        /*
         *      First save the IER then disable the interrupts
@@ -2266,7 +2292,8 @@ serial8250_console_write(struct console *co, const char *s, unsigned int count)
        serial_out(up, UART_IER, ier);
 
        if (locked)
-               spin_unlock_irqrestore(&up->port.lock, flags);
+               spin_unlock(&up->port.lock);
+       local_irq_restore(flags);
 }
 
 static int serial8250_console_setup(struct console *co, char *options)
@@ -2354,7 +2381,6 @@ int __init serial8250_start_console(struct uart_port *port, char *options)
 static struct uart_driver serial8250_reg = {
        .owner                  = THIS_MODULE,
        .driver_name            = "serial",
-       .devfs_name             = "tts/",
        .dev_name               = "ttyS",
        .major                  = TTY_MAJOR,
        .minor                  = 64,
@@ -2382,7 +2408,6 @@ int __init early_serial_setup(struct uart_port *port)
 /**
  *     serial8250_suspend_port - suspend one serial port
  *     @line:  serial line number
- *      @level: the level of port suspension, as per uart_suspend_port
  *
  *     Suspend one serial port.
  */
@@ -2394,7 +2419,6 @@ void serial8250_suspend_port(int line)
 /**
  *     serial8250_resume_port - resume one serial port
  *     @line:  serial line number
- *      @level: the level of port resumption, as per uart_resume_port
  *
  *     Resume one serial port.
  */