6ab3d5624e
Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
193 lines
3.9 KiB
C
193 lines
3.9 KiB
C
/*
|
|
* linux/arch/arm/mach-omap1/leds-osk.c
|
|
*
|
|
* LED driver for OSK, and optionally Mistral QVGA, boards
|
|
*/
|
|
#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);
|
|
}
|