[PATCH] ARM: 2799/1: OMAP update 4/11: Move OMAP1 LED code into mach-omap1 directory

Patch from Tony Lindgren

This patch by Paul Mundt and other OMAP developers
moves OMAP1 specific LED code into mach-omap1 directory.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 194 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 0000000..4a0e8b9
--- /dev/null
+++ b/arch/arm/mach-omap1/leds-osk.c
@@ -0,0 +1,194 @@
+/*
+ * linux/arch/arm/mach-omap/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_FB_OMAP
+
+/* 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_FB_OMAP
+
+	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_FB_OMAP */
+
+	/* "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);
+}