1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
114 lines
2.3 KiB
C
114 lines
2.3 KiB
C
/*
|
|
* linux/arch/arm/mach-sa1100/leds-hackkit.c
|
|
*
|
|
* based on leds-lart.c
|
|
*
|
|
* (C) Erik Mouw (J.A.K.Mouw@its.tudelft.nl), April 21, 2000
|
|
* (C) Stefan Eletzhofer <stefan.eletzhofer@eletztrick.de>, 2002
|
|
*
|
|
* The HackKit has two leds (GPIO 22/23). The red led (gpio 22) is used
|
|
* as cpu led, the green one is used as timer led.
|
|
*/
|
|
#include <linux/config.h>
|
|
#include <linux/init.h>
|
|
|
|
#include <asm/hardware.h>
|
|
#include <asm/leds.h>
|
|
#include <asm/system.h>
|
|
|
|
#include "leds.h"
|
|
|
|
|
|
#define LED_STATE_ENABLED 1
|
|
#define LED_STATE_CLAIMED 2
|
|
|
|
static unsigned int led_state;
|
|
static unsigned int hw_led_state;
|
|
|
|
#define LED_GREEN GPIO_GPIO23
|
|
#define LED_RED GPIO_GPIO22
|
|
#define LED_MASK (LED_RED | LED_GREEN)
|
|
|
|
void hackkit_leds_event(led_event_t evt)
|
|
{
|
|
unsigned long flags;
|
|
|
|
local_irq_save(flags);
|
|
|
|
switch(evt) {
|
|
case led_start:
|
|
/* pin 22/23 are outputs */
|
|
GPDR |= LED_MASK;
|
|
hw_led_state = LED_MASK;
|
|
led_state = LED_STATE_ENABLED;
|
|
break;
|
|
|
|
case led_stop:
|
|
led_state &= ~LED_STATE_ENABLED;
|
|
break;
|
|
|
|
case led_claim:
|
|
led_state |= LED_STATE_CLAIMED;
|
|
hw_led_state = LED_MASK;
|
|
break;
|
|
|
|
case led_release:
|
|
led_state &= ~LED_STATE_CLAIMED;
|
|
hw_led_state = LED_MASK;
|
|
break;
|
|
|
|
#ifdef CONFIG_LEDS_TIMER
|
|
case led_timer:
|
|
if (!(led_state & LED_STATE_CLAIMED))
|
|
hw_led_state ^= LED_GREEN;
|
|
break;
|
|
#endif
|
|
|
|
#ifdef CONFIG_LEDS_CPU
|
|
case led_idle_start:
|
|
/* The LART people like the LED to be off when the
|
|
system is idle... */
|
|
if (!(led_state & LED_STATE_CLAIMED))
|
|
hw_led_state &= ~LED_RED;
|
|
break;
|
|
|
|
case led_idle_end:
|
|
/* ... and on if the system is not idle */
|
|
if (!(led_state & LED_STATE_CLAIMED))
|
|
hw_led_state |= LED_RED;
|
|
break;
|
|
#endif
|
|
|
|
case led_red_on:
|
|
if (led_state & LED_STATE_CLAIMED)
|
|
hw_led_state &= ~LED_RED;
|
|
break;
|
|
|
|
case led_red_off:
|
|
if (led_state & LED_STATE_CLAIMED)
|
|
hw_led_state |= LED_RED;
|
|
break;
|
|
|
|
case led_green_on:
|
|
if (led_state & LED_STATE_CLAIMED)
|
|
hw_led_state &= ~LED_GREEN;
|
|
break;
|
|
|
|
case led_green_off:
|
|
if (led_state & LED_STATE_CLAIMED)
|
|
hw_led_state |= LED_GREEN;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/* Now set the GPIO state, or nothing will happen at all */
|
|
if (led_state & LED_STATE_ENABLED) {
|
|
GPSR = hw_led_state;
|
|
GPCR = hw_led_state ^ LED_MASK;
|
|
}
|
|
|
|
local_irq_restore(flags);
|
|
}
|