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gerrit-public.fairphone.software / kernel / msm-4.9 / 9f97da78bf018206fb623cd351d454af2f105fe0 / . / arch / arm / mach-sa1100 / leds-assabet.c
blob: 3699176bca94fc141a34a3294bd10a7d7afc5ca9 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]12#include <linux/init.h>
13
Russell Kinga09e64f2008-08-05 16:14:15 +0100[diff] [blame]14#include <mach/hardware.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]15#include <asm/leds.h>
Russell Kinga09e64f2008-08-05 16:14:15 +0100[diff] [blame]16#include <mach/assabet.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]17
18#include "leds.h"
19
20
21#define LED_STATE_ENABLED 1
22#define LED_STATE_CLAIMED 2
23
24static unsigned int led_state;
25static unsigned int hw_led_state;
26
27#define ASSABET_BCR_LED_MASK (ASSABET_BCR_LED_GREEN | ASSABET_BCR_LED_RED)
28
29void assabet_leds_event(led_event_t evt)
30{
31 unsigned long flags;
32
33 local_irq_save(flags);
34
35 switch (evt) {
36 case led_start:
37 hw_led_state = ASSABET_BCR_LED_RED | ASSABET_BCR_LED_GREEN;
38 led_state = LED_STATE_ENABLED;
39 break;
40
41 case led_stop:
42 led_state &= ~LED_STATE_ENABLED;
43 hw_led_state = ASSABET_BCR_LED_RED | ASSABET_BCR_LED_GREEN;
44 ASSABET_BCR_frob(ASSABET_BCR_LED_MASK, hw_led_state);
45 break;
46
47 case led_claim:
48 led_state |= LED_STATE_CLAIMED;
49 hw_led_state = ASSABET_BCR_LED_RED | ASSABET_BCR_LED_GREEN;
50 break;
51
52 case led_release:
53 led_state &= ~LED_STATE_CLAIMED;
54 hw_led_state = ASSABET_BCR_LED_RED | ASSABET_BCR_LED_GREEN;
55 break;
56
57#ifdef CONFIG_LEDS_TIMER
58 case led_timer:
59 if (!(led_state & LED_STATE_CLAIMED))
60 hw_led_state ^= ASSABET_BCR_LED_GREEN;
61 break;
62#endif
63
64#ifdef CONFIG_LEDS_CPU
65 case led_idle_start:
66 if (!(led_state & LED_STATE_CLAIMED))
67 hw_led_state |= ASSABET_BCR_LED_RED;
68 break;
69
70 case led_idle_end:
71 if (!(led_state & LED_STATE_CLAIMED))
72 hw_led_state &= ~ASSABET_BCR_LED_RED;
73 break;
74#endif
75
76 case led_halted:
77 break;
78
79 case led_green_on:
80 if (led_state & LED_STATE_CLAIMED)
81 hw_led_state &= ~ASSABET_BCR_LED_GREEN;
82 break;
83
84 case led_green_off:
85 if (led_state & LED_STATE_CLAIMED)
86 hw_led_state |= ASSABET_BCR_LED_GREEN;
87 break;
88
89 case led_amber_on:
90 break;
91
92 case led_amber_off:
93 break;
94
95 case led_red_on:
96 if (led_state & LED_STATE_CLAIMED)
97 hw_led_state &= ~ASSABET_BCR_LED_RED;
98 break;
99
100 case led_red_off:
101 if (led_state & LED_STATE_CLAIMED)
102 hw_led_state |= ASSABET_BCR_LED_RED;
103 break;
104
105 default:
106 break;
107 }
108
109 if (led_state & LED_STATE_ENABLED)
110 ASSABET_BCR_frob(ASSABET_BCR_LED_MASK, hw_led_state);
111
112 local_irq_restore(flags);
113}