102 lines
2.0 KiB
C
102 lines
2.0 KiB
C
/*
|
|
* linux/arch/arm/mach-sa1100/leds-lart.c
|
|
*
|
|
* (C) Erik Mouw (J.A.K.Mouw@its.tudelft.nl), April 21, 2000
|
|
*
|
|
* LART uses the LED as follows:
|
|
* - GPIO23 is the LED, on if system is not idle
|
|
* You can use both CONFIG_LEDS_CPU and CONFIG_LEDS_TIMER at the same
|
|
* time, but in that case the timer events will still dictate the
|
|
* pace of the LED.
|
|
*/
|
|
#include <linux/init.h>
|
|
|
|
#include <mach/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_23 GPIO_GPIO23
|
|
#define LED_MASK (LED_23)
|
|
|
|
void lart_leds_event(led_event_t evt)
|
|
{
|
|
unsigned long flags;
|
|
|
|
local_irq_save(flags);
|
|
|
|
switch(evt) {
|
|
case led_start:
|
|
/* pin 23 is output pin */
|
|
GPDR |= LED_23;
|
|
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_23;
|
|
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_23;
|
|
break;
|
|
|
|
case led_idle_end:
|
|
/* ... and on if the system is not idle */
|
|
if (!(led_state & LED_STATE_CLAIMED))
|
|
hw_led_state |= LED_23;
|
|
break;
|
|
#endif
|
|
|
|
case led_red_on:
|
|
if (led_state & LED_STATE_CLAIMED)
|
|
hw_led_state &= ~LED_23;
|
|
break;
|
|
|
|
case led_red_off:
|
|
if (led_state & LED_STATE_CLAIMED)
|
|
hw_led_state |= LED_23;
|
|
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);
|
|
}
|