164 lines
3.3 KiB
C
164 lines
3.3 KiB
C
/*
|
|
* arch/arm/kernel/leds-shark.c
|
|
* by Alexander Schulz
|
|
*
|
|
* derived from:
|
|
* arch/arm/kernel/leds-footbridge.c
|
|
* Copyright (C) 1998-1999 Russell King
|
|
*
|
|
* DIGITAL Shark LED control routines.
|
|
*
|
|
* The leds use is as follows:
|
|
* - Green front - toggles state every 50 timer interrupts
|
|
* - Amber front - Unused, this is a dual color led (Amber/Green)
|
|
* - Amber back - On if system is not idle
|
|
*
|
|
* Changelog:
|
|
*/
|
|
#include <linux/config.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/ioport.h>
|
|
|
|
#include <asm/hardware.h>
|
|
#include <asm/leds.h>
|
|
#include <asm/io.h>
|
|
#include <asm/system.h>
|
|
|
|
#define LED_STATE_ENABLED 1
|
|
#define LED_STATE_CLAIMED 2
|
|
static char led_state;
|
|
static short hw_led_state;
|
|
static short saved_state;
|
|
|
|
static DEFINE_SPINLOCK(leds_lock);
|
|
|
|
short sequoia_read(int addr) {
|
|
outw(addr,0x24);
|
|
return inw(0x26);
|
|
}
|
|
|
|
void sequoia_write(short value,short addr) {
|
|
outw(addr,0x24);
|
|
outw(value,0x26);
|
|
}
|
|
|
|
static void sequoia_leds_event(led_event_t evt)
|
|
{
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&leds_lock, flags);
|
|
|
|
hw_led_state = sequoia_read(0x09);
|
|
|
|
switch (evt) {
|
|
case led_start:
|
|
hw_led_state |= SEQUOIA_LED_GREEN;
|
|
hw_led_state |= SEQUOIA_LED_AMBER;
|
|
#ifdef CONFIG_LEDS_CPU
|
|
hw_led_state |= SEQUOIA_LED_BACK;
|
|
#else
|
|
hw_led_state &= ~SEQUOIA_LED_BACK;
|
|
#endif
|
|
led_state |= LED_STATE_ENABLED;
|
|
break;
|
|
|
|
case led_stop:
|
|
hw_led_state &= ~SEQUOIA_LED_BACK;
|
|
hw_led_state |= SEQUOIA_LED_GREEN;
|
|
hw_led_state |= SEQUOIA_LED_AMBER;
|
|
led_state &= ~LED_STATE_ENABLED;
|
|
break;
|
|
|
|
case led_claim:
|
|
led_state |= LED_STATE_CLAIMED;
|
|
saved_state = hw_led_state;
|
|
hw_led_state &= ~SEQUOIA_LED_BACK;
|
|
hw_led_state |= SEQUOIA_LED_GREEN;
|
|
hw_led_state |= SEQUOIA_LED_AMBER;
|
|
break;
|
|
|
|
case led_release:
|
|
led_state &= ~LED_STATE_CLAIMED;
|
|
hw_led_state = saved_state;
|
|
break;
|
|
|
|
#ifdef CONFIG_LEDS_TIMER
|
|
case led_timer:
|
|
if (!(led_state & LED_STATE_CLAIMED))
|
|
hw_led_state ^= SEQUOIA_LED_GREEN;
|
|
break;
|
|
#endif
|
|
|
|
#ifdef CONFIG_LEDS_CPU
|
|
case led_idle_start:
|
|
if (!(led_state & LED_STATE_CLAIMED))
|
|
hw_led_state &= ~SEQUOIA_LED_BACK;
|
|
break;
|
|
|
|
case led_idle_end:
|
|
if (!(led_state & LED_STATE_CLAIMED))
|
|
hw_led_state |= SEQUOIA_LED_BACK;
|
|
break;
|
|
#endif
|
|
|
|
case led_green_on:
|
|
if (led_state & LED_STATE_CLAIMED)
|
|
hw_led_state &= ~SEQUOIA_LED_GREEN;
|
|
break;
|
|
|
|
case led_green_off:
|
|
if (led_state & LED_STATE_CLAIMED)
|
|
hw_led_state |= SEQUOIA_LED_GREEN;
|
|
break;
|
|
|
|
case led_amber_on:
|
|
if (led_state & LED_STATE_CLAIMED)
|
|
hw_led_state &= ~SEQUOIA_LED_AMBER;
|
|
break;
|
|
|
|
case led_amber_off:
|
|
if (led_state & LED_STATE_CLAIMED)
|
|
hw_led_state |= SEQUOIA_LED_AMBER;
|
|
break;
|
|
|
|
case led_red_on:
|
|
if (led_state & LED_STATE_CLAIMED)
|
|
hw_led_state |= SEQUOIA_LED_BACK;
|
|
break;
|
|
|
|
case led_red_off:
|
|
if (led_state & LED_STATE_CLAIMED)
|
|
hw_led_state &= ~SEQUOIA_LED_BACK;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (led_state & LED_STATE_ENABLED)
|
|
sequoia_write(hw_led_state,0x09);
|
|
|
|
spin_unlock_irqrestore(&leds_lock, flags);
|
|
}
|
|
|
|
static int __init leds_init(void)
|
|
{
|
|
extern void (*leds_event)(led_event_t);
|
|
short temp;
|
|
|
|
leds_event = sequoia_leds_event;
|
|
|
|
/* Make LEDs independent of power-state */
|
|
request_region(0x24,4,"sequoia");
|
|
temp = sequoia_read(0x09);
|
|
temp |= 1<<10;
|
|
sequoia_write(temp,0x09);
|
|
leds_event(led_start);
|
|
return 0;
|
|
}
|
|
|
|
__initcall(leds_init);
|