[linux-2.6-block.git] / arch / arm / mach-shark / leds.c

/*
 * arch/arm/mach-shark/leds.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/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/ioport.h>
#include <linux/io.h>

#include <asm/leds.h>
#include <asm/system.h>

#define LED_STATE_ENABLED	1
#define LED_STATE_CLAIMED	2

#define SEQUOIA_LED_GREEN       (1<<6)
#define SEQUOIA_LED_AMBER       (1<<5)
#define SEQUOIA_LED_BACK        (1<<7)

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);
Commit	Line	Data
1da177e4	1	/*
f30c2269	2	* arch/arm/mach-shark/leds.c
1da177e4 LT	3	* by Alexander Schulz
	4	*
	5	* derived from:
	6	* arch/arm/kernel/leds-footbridge.c
	7	* Copyright (C) 1998-1999 Russell King
	8	*
	9	* DIGITAL Shark LED control routines.
	10	*
	11	* The leds use is as follows:
	12	* - Green front - toggles state every 50 timer interrupts
	13	* - Amber front - Unused, this is a dual color led (Amber/Green)
	14	* - Amber back - On if system is not idle
	15	*
	16	* Changelog:
	17	*/
1da177e4 LT	18	#include <linux/kernel.h>
	19	#include <linux/module.h>
	20	#include <linux/init.h>
	21	#include <linux/spinlock.h>
	22	#include <linux/ioport.h>
fced80c7	23	#include <linux/io.h>
1da177e4	24
1da177e4	25	#include <asm/leds.h>
1da177e4 LT	26	#include <asm/system.h>
	27
	28	#define LED_STATE_ENABLED 1
	29	#define LED_STATE_CLAIMED 2
eab184c2 AS	30
	31	#define SEQUOIA_LED_GREEN (1<<6)
	32	#define SEQUOIA_LED_AMBER (1<<5)
	33	#define SEQUOIA_LED_BACK (1<<7)
	34
1da177e4 LT	35	static char led_state;
	36	static short hw_led_state;
	37	static short saved_state;
	38
	39	static DEFINE_SPINLOCK(leds_lock);
	40
	41	short sequoia_read(int addr) {
	42	outw(addr,0x24);
	43	return inw(0x26);
	44	}
	45
	46	void sequoia_write(short value,short addr) {
	47	outw(addr,0x24);
	48	outw(value,0x26);
	49	}
	50
	51	static void sequoia_leds_event(led_event_t evt)
	52	{
	53	unsigned long flags;
	54
	55	spin_lock_irqsave(&leds_lock, flags);
	56
	57	hw_led_state = sequoia_read(0x09);
	58
	59	switch (evt) {
	60	case led_start:
	61	hw_led_state \|= SEQUOIA_LED_GREEN;
	62	hw_led_state \|= SEQUOIA_LED_AMBER;
	63	#ifdef CONFIG_LEDS_CPU
	64	hw_led_state \|= SEQUOIA_LED_BACK;
	65	#else
	66	hw_led_state &= ~SEQUOIA_LED_BACK;
	67	#endif
	68	led_state \|= LED_STATE_ENABLED;
	69	break;
	70
	71	case led_stop:
	72	hw_led_state &= ~SEQUOIA_LED_BACK;
	73	hw_led_state \|= SEQUOIA_LED_GREEN;
	74	hw_led_state \|= SEQUOIA_LED_AMBER;
	75	led_state &= ~LED_STATE_ENABLED;
	76	break;
	77
	78	case led_claim:
	79	led_state \|= LED_STATE_CLAIMED;
	80	saved_state = hw_led_state;
	81	hw_led_state &= ~SEQUOIA_LED_BACK;
	82	hw_led_state \|= SEQUOIA_LED_GREEN;
	83	hw_led_state \|= SEQUOIA_LED_AMBER;
	84	break;
	85
	86	case led_release:
	87	led_state &= ~LED_STATE_CLAIMED;
	88	hw_led_state = saved_state;
	89	break;
	90
	91	#ifdef CONFIG_LEDS_TIMER
	92	case led_timer:
	93	if (!(led_state & LED_STATE_CLAIMED))
	94	hw_led_state ^= SEQUOIA_LED_GREEN;
	95	break;
	96	#endif
	97
	98	#ifdef CONFIG_LEDS_CPU
99	case led_idle_start:
100	if (!(led_state & LED_STATE_CLAIMED))
101	hw_led_state &= ~SEQUOIA_LED_BACK;
102	break;
103
104	case led_idle_end:
105	if (!(led_state & LED_STATE_CLAIMED))
106	hw_led_state \|= SEQUOIA_LED_BACK;
107	break;
108	#endif
109
110	case led_green_on:
111	if (led_state & LED_STATE_CLAIMED)
112	hw_led_state &= ~SEQUOIA_LED_GREEN;
113	break;
114
115	case led_green_off:
116	if (led_state & LED_STATE_CLAIMED)
117	hw_led_state \|= SEQUOIA_LED_GREEN;
118	break;
119
120	case led_amber_on:
121	if (led_state & LED_STATE_CLAIMED)
122	hw_led_state &= ~SEQUOIA_LED_AMBER;
123	break;
124
125	case led_amber_off:
126	if (led_state & LED_STATE_CLAIMED)
127	hw_led_state \|= SEQUOIA_LED_AMBER;
128	break;
129
130	case led_red_on:
131	if (led_state & LED_STATE_CLAIMED)
132	hw_led_state \|= SEQUOIA_LED_BACK;
133	break;
134
135	case led_red_off:
136	if (led_state & LED_STATE_CLAIMED)
137	hw_led_state &= ~SEQUOIA_LED_BACK;
138	break;
139
140	default:
141	break;
142	}
143
144	if (led_state & LED_STATE_ENABLED)
145	sequoia_write(hw_led_state,0x09);
146
147	spin_unlock_irqrestore(&leds_lock, flags);
148	}
149
150	static int __init leds_init(void)
151	{
152	extern void (*leds_event)(led_event_t);
153	short temp;
154
155	leds_event = sequoia_leds_event;
156
157	/* Make LEDs independent of power-state */
158	request_region(0x24,4,"sequoia");
159	temp = sequoia_read(0x09);
160	temp \|= 1<<10;
161	sequoia_write(temp,0x09);
162	leds_event(led_start);
163	return 0;
164	}
165
166	__initcall(leds_init);