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1da177e4 LT |
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 | */ | |
1da177e4 LT |
12 | #include <linux/init.h> |
13 | ||
a09e64fb | 14 | #include <mach/hardware.h> |
1da177e4 LT |
15 | #include <asm/leds.h> |
16 | #include <asm/system.h> | |
a09e64fb | 17 | #include <mach/assabet.h> |
1da177e4 LT |
18 | |
19 | #include "leds.h" | |
20 | ||
21 | ||
22 | #define LED_STATE_ENABLED 1 | |
23 | #define LED_STATE_CLAIMED 2 | |
24 | ||
25 | static unsigned int led_state; | |
26 | static unsigned int hw_led_state; | |
27 | ||
28 | #define ASSABET_BCR_LED_MASK (ASSABET_BCR_LED_GREEN | ASSABET_BCR_LED_RED) | |
29 | ||
30 | void 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 | } |