Merge branch 'next/soc-exynos5250-arch' of git://git.kernel.org/pub/scm/linux/kernel...
[linux-2.6.git] / arch / arm / mach-sa1100 / leds-assabet.c
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 <mach/hardware.h>
15 #include <asm/leds.h>
16 #include <asm/system.h>
17 #include <mach/assabet.h>
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 }