Merge branch 'work'

[powerpc.git] / arch / arm / mach-omap1 / serial.c

diff --git a/arch/arm/mach-omap1/serial.c b/arch/arm/mach-omap1/serial.c
index 214e5d1..7a68f09 100644 (file)
--- a/arch/arm/mach-omap1/serial.c
+++ b/arch/arm/mach-omap1/serial.c
@@ -17,14 +17,18 @@
 #include <linux/tty.h>
 #include <linux/serial_8250.h>
 #include <linux/serial_reg.h>
+#include <linux/clk.h>
 
 #include <asm/io.h>
 #include <asm/mach-types.h>
-#include <asm/hardware/clock.h>
 
 #include <asm/arch/board.h>
 #include <asm/arch/mux.h>
+#include <asm/arch/gpio.h>
 #include <asm/arch/fpga.h>
+#ifdef CONFIG_PM
+#include <asm/arch/pm.h>
+#endif
 
 static struct clk * uart1_ck = NULL;
 static struct clk * uart2_ck = NULL;
@@ -94,7 +98,7 @@ static struct plat_serial8250_port serial_platform_data[] = {
 
 static struct platform_device serial_device = {
        .name                   = "serial8250",
-       .id                     = 0,
+       .id                     = PLAT8250_DEV_PLATFORM,
        .dev                    = {
                .platform_data  = serial_platform_data,
        },
@@ -105,9 +109,10 @@ static struct platform_device serial_device = {
  * By default UART2 does not work on Innovator-1510 if you have
  * USB OHCI enabled. To use UART2, you must disable USB2 first.
  */
-void __init omap_serial_init(int ports[OMAP_MAX_NR_PORTS])
+void __init omap_serial_init(void)
 {
        int i;
+       const struct omap_uart_config *info;
 
        if (cpu_is_omap730()) {
                serial_platform_data[0].regshift = 0;
@@ -122,10 +127,14 @@ void __init omap_serial_init(int ports[OMAP_MAX_NR_PORTS])
                serial_platform_data[2].uartclk = OMAP1510_BASE_BAUD * 16;
        }
 
+       info = omap_get_config(OMAP_TAG_UART, struct omap_uart_config);
+       if (info == NULL)
+               return;
+
        for (i = 0; i < OMAP_MAX_NR_PORTS; i++) {
                unsigned char reg;
 
-               if (ports[i] == 0) {
+               if (!((1 << i) & info->enabled_uarts)) {
                        serial_platform_data[i].membase = NULL;
                        serial_platform_data[i].mapbase = 0;
                        continue;
@@ -193,6 +202,85 @@ void __init omap_serial_init(int ports[OMAP_MAX_NR_PORTS])
        }
 }
 
+#ifdef CONFIG_OMAP_SERIAL_WAKE
+
+static irqreturn_t omap_serial_wake_interrupt(int irq, void *dev_id,
+                                             struct pt_regs *regs)
+{
+       /* Need to do something with serial port right after wake-up? */
+       return IRQ_HANDLED;
+}
+
+/*
+ * Reroutes serial RX lines to GPIO lines for the duration of
+ * sleep to allow waking up the device from serial port even
+ * in deep sleep.
+ */
+void omap_serial_wake_trigger(int enable)
+{
+       if (!cpu_is_omap16xx())
+               return;
+
+       if (uart1_ck != NULL) {
+               if (enable)
+                       omap_cfg_reg(V14_16XX_GPIO37);
+               else
+                       omap_cfg_reg(V14_16XX_UART1_RX);
+       }
+       if (uart2_ck != NULL) {
+               if (enable)
+                       omap_cfg_reg(R9_16XX_GPIO18);
+               else
+                       omap_cfg_reg(R9_16XX_UART2_RX);
+       }
+       if (uart3_ck != NULL) {
+               if (enable)
+                       omap_cfg_reg(L14_16XX_GPIO49);
+               else
+                       omap_cfg_reg(L14_16XX_UART3_RX);
+       }
+}
+
+static void __init omap_serial_set_port_wakeup(int gpio_nr)
+{
+       int ret;
+
+       ret = omap_request_gpio(gpio_nr);
+       if (ret < 0) {
+               printk(KERN_ERR "Could not request UART wake GPIO: %i\n",
+                      gpio_nr);
+               return;
+       }
+       omap_set_gpio_direction(gpio_nr, 1);
+       ret = request_irq(OMAP_GPIO_IRQ(gpio_nr), &omap_serial_wake_interrupt,
+                         SA_TRIGGER_RISING, "serial wakeup", NULL);
+       if (ret) {
+               omap_free_gpio(gpio_nr);
+               printk(KERN_ERR "No interrupt for UART wake GPIO: %i\n",
+                      gpio_nr);
+               return;
+       }
+       enable_irq_wake(OMAP_GPIO_IRQ(gpio_nr));
+}
+
+static int __init omap_serial_wakeup_init(void)
+{
+       if (!cpu_is_omap16xx())
+               return 0;
+
+       if (uart1_ck != NULL)
+               omap_serial_set_port_wakeup(37);
+       if (uart2_ck != NULL)
+               omap_serial_set_port_wakeup(18);
+       if (uart3_ck != NULL)
+               omap_serial_set_port_wakeup(49);
+
+       return 0;
+}
+late_initcall(omap_serial_wakeup_init);
+
+#endif /* CONFIG_OMAP_SERIAL_WAKE */
+
 static int __init omap_init(void)
 {
        return platform_device_register(&serial_device);