Merge current mainline tree into linux-omap tree

[linux-2.6-omap-h63xx.git] / drivers / serial / 8250.c

diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index 342e12fb1c2525f74bb15d0e21ca4e473962ecd1..39aca22e57a843e821e777fb1d1edf394f1840c8 100644 (file)
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -1513,7 +1513,11 @@ static irqreturn_t serial8250_interrupt(int irq, void *dev_id)
 
        DEBUG_INTR("end.\n");
 
+#ifdef CONFIG_ARCH_OMAP15XX
+       return IRQ_HANDLED;     /* FIXME: iir status not ready on 1510 */
+#else
        return IRQ_RETVAL(handled);
+#endif
 }
 
 /*
@@ -1908,14 +1912,22 @@ static int serial8250_startup(struct uart_port *port)
                 * kick the UART on a regular basis.
                 */
                if (!(iir1 & UART_IIR_NO_INT) && (iir & UART_IIR_NO_INT)) {
+                       up->bugs |= UART_BUG_THRE;
                        pr_debug("ttyS%d - using backup timer\n", port->line);
-                       up->timer.function = serial8250_backup_timeout;
-                       up->timer.data = (unsigned long)up;
-                       mod_timer(&up->timer, jiffies +
-                               poll_timeout(up->port.timeout) + HZ / 5);
                }
        }
 
+       /*
+        * The above check will only give an accurate result the first time
+        * the port is opened so this value needs to be preserved.
+        */
+       if (up->bugs & UART_BUG_THRE) {
+               up->timer.function = serial8250_backup_timeout;
+               up->timer.data = (unsigned long)up;
+               mod_timer(&up->timer, jiffies +
+                         poll_timeout(up->port.timeout) + HZ / 5);
+       }
+
        /*
         * If the "interrupt" for this port doesn't correspond with any
         * hardware interrupt, we use a timer-based system.  The original
@@ -2203,9 +2215,9 @@ serial8250_set_termios(struct uart_port *port, struct ktermios *termios,
                serial_outp(up, UART_EFR, efr);
        }
 
-#ifdef CONFIG_ARCH_OMAP15XX
+#ifdef CONFIG_ARCH_OMAP
        /* Workaround to enable 115200 baud on OMAP1510 internal ports */
-       if (cpu_is_omap1510() && is_omap_port((unsigned int)up->port.membase)) {
+       if (cpu_is_omap1510() && is_omap_port(up)) {
                if (baud == 115200) {
                        quot = 1;
                        serial_out(up, UART_OMAP_OSC_12M_SEL, 1);
@@ -2237,6 +2249,19 @@ serial8250_set_termios(struct uart_port *port, struct ktermios *termios,
                        /* emulated UARTs (Lucent Venus 167x) need two steps */
                        serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO);
                }
+
+               /* Note that we need to set ECB to access write water mark
+                * bits. First allow FCR tx fifo write, then set fcr with
+                * possible TX fifo settings. */
+               if (uart_config[up->port.type].flags & UART_CAP_EFR) {
+                       serial_outp(up, UART_LCR, 0xbf);        /* Access EFR */
+                       serial_outp(up, UART_EFR, UART_EFR_ECB);
+                       serial_outp(up, UART_LCR, 0x0);         /* Access FCR */
+                       serial_outp(up, UART_FCR, fcr);
+                       serial_outp(up, UART_LCR, 0xbf);        /* Access EFR */
+                       serial_outp(up, UART_EFR, 0);
+                       serial_outp(up, UART_LCR, cval);        /* Access FCR */
+        } else
                serial_outp(up, UART_FCR, fcr);         /* set fcr */
        }
        serial8250_set_mctrl(&up->port, up->port.mctrl);
@@ -2258,18 +2283,27 @@ serial8250_pm(struct uart_port *port, unsigned int state,
                p->pm(port, state, oldstate);
 }
 
+static unsigned int serial8250_port_size(struct uart_8250_port *pt)
+{
+       if (pt->port.iotype == UPIO_AU)
+               return 0x100000;
+#ifdef CONFIG_ARCH_OMAP
+       if (is_omap_port(pt))
+               return 0x16 << pt->port.regshift;
+#endif
+       return 8 << pt->port.regshift;
+}
+
 /*
  * Resource handling.
  */
 static int serial8250_request_std_resource(struct uart_8250_port *up)
 {
-       unsigned int size = 8 << up->port.regshift;
+       unsigned int size = serial8250_port_size(up);
        int ret = 0;
 
        switch (up->port.iotype) {
        case UPIO_AU:
-               size = 0x100000;
-               /* fall thru */
        case UPIO_TSI:
        case UPIO_MEM32:
        case UPIO_MEM:
@@ -2303,12 +2337,10 @@ static int serial8250_request_std_resource(struct uart_8250_port *up)
 
 static void serial8250_release_std_resource(struct uart_8250_port *up)
 {
-       unsigned int size = 8 << up->port.regshift;
+       unsigned int size = serial8250_port_size(up);
 
        switch (up->port.iotype) {
        case UPIO_AU:
-               size = 0x100000;
-               /* fall thru */
        case UPIO_TSI:
        case UPIO_MEM32:
        case UPIO_MEM: