1/*
2 * linux/arch/arm/mach-sa1100/leds-assabet.c
3 *
4 * Copyright (C) 2000 John Dorsey <john+@cs.cmu.edu>
5 *
6 * Original (leds-footbridge.c) by Russell King
7 *
8 * Assabet uses the LEDs as follows:
9 *   - Green - toggles state every 50 timer interrupts
10 *   - Red   - on if system is not idle
11 */
12#include <linux/init.h>
13
14#include <asm/hardware.h>
15#include <asm/leds.h>
16#include <asm/system.h>
17#include <asm/arch/assabet.h>
18
19#include "leds.h"
20
21
22#define LED_STATE_ENABLED	1
23#define LED_STATE_CLAIMED	2
24
25static unsigned int led_state;
26static unsigned int hw_led_state;
27
28#define ASSABET_BCR_LED_MASK	(ASSABET_BCR_LED_GREEN | ASSABET_BCR_LED_RED)
29
30void assabet_leds_event(led_event_t evt)
31{
32	unsigned long flags;
33
34	local_irq_save(flags);
35
36	switch (evt) {
37	case led_start:
38		hw_led_state = ASSABET_BCR_LED_RED | ASSABET_BCR_LED_GREEN;
39		led_state = LED_STATE_ENABLED;
40		break;
41
42	case led_stop:
43		led_state &= ~LED_STATE_ENABLED;
44		hw_led_state = ASSABET_BCR_LED_RED | ASSABET_BCR_LED_GREEN;
45		ASSABET_BCR_frob(ASSABET_BCR_LED_MASK, hw_led_state);
46		break;
47
48	case led_claim:
49		led_state |= LED_STATE_CLAIMED;
50		hw_led_state = ASSABET_BCR_LED_RED | ASSABET_BCR_LED_GREEN;
51		break;
52
53	case led_release:
54		led_state &= ~LED_STATE_CLAIMED;
55		hw_led_state = ASSABET_BCR_LED_RED | ASSABET_BCR_LED_GREEN;
56		break;
57
58#ifdef CONFIG_LEDS_TIMER
59	case led_timer:
60		if (!(led_state & LED_STATE_CLAIMED))
61			hw_led_state ^= ASSABET_BCR_LED_GREEN;
62		break;
63#endif
64
65#ifdef CONFIG_LEDS_CPU
66	case led_idle_start:
67		if (!(led_state & LED_STATE_CLAIMED))
68			hw_led_state |= ASSABET_BCR_LED_RED;
69		break;
70
71	case led_idle_end:
72		if (!(led_state & LED_STATE_CLAIMED))
73			hw_led_state &= ~ASSABET_BCR_LED_RED;
74		break;
75#endif
76
77	case led_halted:
78		break;
79
80	case led_green_on:
81		if (led_state & LED_STATE_CLAIMED)
82			hw_led_state &= ~ASSABET_BCR_LED_GREEN;
83		break;
84
85	case led_green_off:
86		if (led_state & LED_STATE_CLAIMED)
87			hw_led_state |= ASSABET_BCR_LED_GREEN;
88		break;
89
90	case led_amber_on:
91		break;
92
93	case led_amber_off:
94		break;
95
96	case led_red_on:
97		if (led_state & LED_STATE_CLAIMED)
98			hw_led_state &= ~ASSABET_BCR_LED_RED;
99		break;
100
101	case led_red_off:
102		if (led_state & LED_STATE_CLAIMED)
103			hw_led_state |= ASSABET_BCR_LED_RED;
104		break;
105
106	default:
107		break;
108	}
109
110	if  (led_state & LED_STATE_ENABLED)
111		ASSABET_BCR_frob(ASSABET_BCR_LED_MASK, hw_led_state);
112
113	local_irq_restore(flags);
114}
115