1 files changed, 113 insertions, 0 deletions
diff --git a/arch/arm/mach-omap1/leds-osk.c b/arch/arm/mach-omap1/leds-osk.c
new file mode 100644
index 00000000..936ed426
--- /dev/null
+++ b/arch/arm/mach-omap1/leds-osk.c
@@ -0,0 +1,113 @@
+/*
+ * linux/arch/arm/mach-omap1/leds-osk.c
+ *
+ * LED driver for OSK with optional Mistral QVGA board
+ */
+#include <linux/gpio.h>
+#include <linux/init.h>
+
+#include <mach/hardware.h>
+#include <asm/leds.h>
+
+#include "leds.h"
+
+
+#define LED_STATE_ENABLED	(1 << 0)
+#define LED_STATE_CLAIMED	(1 << 1)
+static u8 led_state;
+
+#define	TIMER_LED		(1 << 3)	/* Mistral board */
+#define	IDLE_LED		(1 << 4)	/* Mistral board */
+static u8 hw_led_state;
+
+
+#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 */
+
+	gpio_set_value(GPIO_LED_GREEN, green);
+	gpio_set_value(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;
+		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:	/* idle == off */
+		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 */
+
+	default:
+		break;
+	}
+
+	leds ^= hw_led_state;
+
+done:
+	local_irq_restore(flags);
+}