Linux-2.6.12-rc2
[linux-2.6.git] / arch / arm / mach-pxa / leds-mainstone.c
1 /*
2  * linux/arch/arm/mach-pxa/leds-mainstone.c
3  *
4  * Author:     Nicolas Pitre
5  * Created:    Nov 05, 2002
6  * Copyright:  MontaVista Software Inc.
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License version 2 as
10  * published by the Free Software Foundation.
11  */
12
13 #include <linux/config.h>
14 #include <linux/init.h>
15
16 #include <asm/hardware.h>
17 #include <asm/leds.h>
18 #include <asm/system.h>
19
20 #include <asm/arch/pxa-regs.h>
21 #include <asm/arch/mainstone.h>
22
23 #include "leds.h"
24
25
26 /* 8 discrete leds available for general use: */
27 #define D28                     (1 << 0)
28 #define D27                     (1 << 1)
29 #define D26                     (1 << 2)
30 #define D25                     (1 << 3)
31 #define D24                     (1 << 4)
32 #define D23                     (1 << 5)
33 #define D22                     (1 << 6)
34 #define D21                     (1 << 7)
35
36 #define LED_STATE_ENABLED       1
37 #define LED_STATE_CLAIMED       2
38
39 static unsigned int led_state;
40 static unsigned int hw_led_state;
41
42 void mainstone_leds_event(led_event_t evt)
43 {
44         unsigned long flags;
45
46         local_irq_save(flags);
47
48         switch (evt) {
49         case led_start:
50                 hw_led_state = 0;
51                 led_state = LED_STATE_ENABLED;
52                 break;
53
54         case led_stop:
55                 led_state &= ~LED_STATE_ENABLED;
56                 break;
57
58         case led_claim:
59                 led_state |= LED_STATE_CLAIMED;
60                 hw_led_state = 0;
61                 break;
62
63         case led_release:
64                 led_state &= ~LED_STATE_CLAIMED;
65                 hw_led_state = 0;
66                 break;
67
68 #ifdef CONFIG_LEDS_TIMER
69         case led_timer:
70                 hw_led_state ^= D26;
71                 break;
72 #endif
73
74 #ifdef CONFIG_LEDS_CPU
75         case led_idle_start:
76                 hw_led_state &= ~D27;
77                 break;
78
79         case led_idle_end:
80                 hw_led_state |= D27;
81                 break;
82 #endif
83
84         case led_halted:
85                 break;
86
87         case led_green_on:
88                 hw_led_state |= D21;;
89                 break;
90
91         case led_green_off:
92                 hw_led_state &= ~D21;
93                 break;
94
95         case led_amber_on:
96                 hw_led_state |= D22;;
97                 break;
98
99         case led_amber_off:
100                 hw_led_state &= ~D22;
101                 break;
102
103         case led_red_on:
104                 hw_led_state |= D23;;
105                 break;
106
107         case led_red_off:
108                 hw_led_state &= ~D23;
109                 break;
110
111         default:
112                 break;
113         }
114
115         if  (led_state & LED_STATE_ENABLED)
116                 MST_LEDCTRL = (MST_LEDCTRL | 0xff) & ~hw_led_state;
117         else
118                 MST_LEDCTRL |= 0xff;
119
120         local_irq_restore(flags);
121 }