This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / arm / mach-omap1 / leds-osk.c

diff --git a/arch/arm/mach-omap1/leds-osk.c b/arch/arm/mach-omap1/leds-osk.c
new file mode 100644 (file)
index 0000000..2c8bda8
--- /dev/null
+++ b/arch/arm/mach-omap1/leds-osk.c
@@ -0,0 +1,194 @@
+/*
+ * linux/arch/arm/mach-omap1/leds-osk.c
+ *
+ * LED driver for OSK, and optionally Mistral QVGA, boards
+ */
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/workqueue.h>
+
+#include <asm/hardware.h>
+#include <asm/leds.h>
+#include <asm/system.h>
+
+#include <asm/arch/gpio.h>
+#include <asm/arch/tps65010.h>
+
+#include "leds.h"
+
+
+#define LED_STATE_ENABLED      (1 << 0)
+#define LED_STATE_CLAIMED      (1 << 1)
+static u8 led_state;
+
+#define        GREEN_LED               (1 << 0)        /* TPS65010 LED1 */
+#define        AMBER_LED               (1 << 1)        /* TPS65010 LED2 */
+#define        RED_LED                 (1 << 2)        /* TPS65010 GPIO2 */
+#define        TIMER_LED               (1 << 3)        /* Mistral board */
+#define        IDLE_LED                (1 << 4)        /* Mistral board */
+static u8 hw_led_state;
+
+
+/* TPS65010 leds are changed using i2c -- from a task context.
+ * Using one of these for the "idle" LED would be impractical...
+ */
+#define        TPS_LEDS        (GREEN_LED | RED_LED | AMBER_LED)
+
+static u8 tps_leds_change;
+
+static void tps_work(void *unused)
+{
+       for (;;) {
+               u8      leds;
+
+               local_irq_disable();
+               leds = tps_leds_change;
+               tps_leds_change = 0;
+               local_irq_enable();
+
+               if (!leds)
+                       break;
+
+               /* careful:  the set_led() value is on/off/blink */
+               if (leds & GREEN_LED)
+                       tps65010_set_led(LED1, !!(hw_led_state & GREEN_LED));
+               if (leds & AMBER_LED)
+                       tps65010_set_led(LED2, !!(hw_led_state & AMBER_LED));
+
+               /* the gpio led doesn't have that issue */
+               if (leds & RED_LED)
+                       tps65010_set_gpio_out_value(GPIO2,
+                                       !(hw_led_state & RED_LED));
+       }
+}
+
+static DECLARE_WORK(work, tps_work, NULL);
+
+#ifdef CONFIG_OMAP_OSK_MISTRAL
+
+/* For now, all system indicators require the Mistral board, since that
+ * LED can be manipulated without a task context.  This LED is either red,
+ * or green, but not both; it can't give the full "disco led" effect.
+ */
+
+#define GPIO_LED_RED           3
+#define GPIO_LED_GREEN         OMAP_MPUIO(4)
+
+static void mistral_setled(void)
+{
+       int     red = 0;
+       int     green = 0;
+
+       if (hw_led_state & TIMER_LED)
+               red = 1;
+       else if (hw_led_state & IDLE_LED)
+               green = 1;
+       // else both sides are disabled
+
+       omap_set_gpio_dataout(GPIO_LED_GREEN, green);
+       omap_set_gpio_dataout(GPIO_LED_RED, red);
+}
+
+#endif
+
+void osk_leds_event(led_event_t evt)
+{
+       unsigned long   flags;
+       u16             leds;
+
+       local_irq_save(flags);
+
+       if (!(led_state & LED_STATE_ENABLED) && evt != led_start)
+               goto done;
+
+       leds = hw_led_state;
+       switch (evt) {
+       case led_start:
+               led_state |= LED_STATE_ENABLED;
+               hw_led_state = 0;
+               leds = ~0;
+               break;
+
+       case led_halted:
+       case led_stop:
+               led_state &= ~LED_STATE_ENABLED;
+               hw_led_state = 0;
+               // NOTE:  work may still be pending!!
+               break;
+
+       case led_claim:
+               led_state |= LED_STATE_CLAIMED;
+               hw_led_state = 0;
+               leds = ~0;
+               break;
+
+       case led_release:
+               led_state &= ~LED_STATE_CLAIMED;
+               hw_led_state = 0;
+               break;
+
+#ifdef CONFIG_OMAP_OSK_MISTRAL
+
+       case led_timer:
+               hw_led_state ^= TIMER_LED;
+               mistral_setled();
+               break;
+
+       case led_idle_start:
+               hw_led_state |= IDLE_LED;
+               mistral_setled();
+               break;
+
+       case led_idle_end:
+               hw_led_state &= ~IDLE_LED;
+               mistral_setled();
+               break;
+
+#endif /* CONFIG_OMAP_OSK_MISTRAL */
+
+       /* "green" == tps LED1 (leftmost, normally power-good)
+        * works only with DC adapter, not on battery power!
+        */
+       case led_green_on:
+               if (led_state & LED_STATE_CLAIMED)
+                       hw_led_state |= GREEN_LED;
+               break;
+       case led_green_off:
+               if (led_state & LED_STATE_CLAIMED)
+                       hw_led_state &= ~GREEN_LED;
+               break;
+
+       /* "amber" == tps LED2 (middle) */
+       case led_amber_on:
+               if (led_state & LED_STATE_CLAIMED)
+                       hw_led_state |= AMBER_LED;
+               break;
+       case led_amber_off:
+               if (led_state & LED_STATE_CLAIMED)
+                       hw_led_state &= ~AMBER_LED;
+               break;
+
+       /* "red" == LED on tps gpio3 (rightmost) */
+       case led_red_on:
+               if (led_state & LED_STATE_CLAIMED)
+                       hw_led_state |= RED_LED;
+               break;
+       case led_red_off:
+               if (led_state & LED_STATE_CLAIMED)
+                       hw_led_state &= ~RED_LED;
+               break;
+
+       default:
+               break;
+       }
+
+       leds ^= hw_led_state;
+       leds &= TPS_LEDS;
+       if (leds && (led_state & LED_STATE_CLAIMED)) {
+               tps_leds_change |= leds;
+               schedule_work(&work);
+       }
+
+done:
+       local_irq_restore(flags);
+}