ARM: OMAP: switch to standard gpio get/set calls
[linux-2.6.git] / arch / arm / mach-omap1 / leds-osk.c
1 /*
2  * linux/arch/arm/mach-omap1/leds-osk.c
3  *
4  * LED driver for OSK with optional Mistral QVGA board
5  */
6 #include <linux/init.h>
7
8 #include <mach/hardware.h>
9 #include <asm/leds.h>
10 #include <asm/system.h>
11
12 #include <mach/gpio.h>
13
14 #include "leds.h"
15
16
17 #define LED_STATE_ENABLED       (1 << 0)
18 #define LED_STATE_CLAIMED       (1 << 1)
19 static u8 led_state;
20
21 #define TIMER_LED               (1 << 3)        /* Mistral board */
22 #define IDLE_LED                (1 << 4)        /* Mistral board */
23 static u8 hw_led_state;
24
25
26 #ifdef  CONFIG_OMAP_OSK_MISTRAL
27
28 /* For now, all system indicators require the Mistral board, since that
29  * LED can be manipulated without a task context.  This LED is either red,
30  * or green, but not both; it can't give the full "disco led" effect.
31  */
32
33 #define GPIO_LED_RED            3
34 #define GPIO_LED_GREEN          OMAP_MPUIO(4)
35
36 static void mistral_setled(void)
37 {
38         int     red = 0;
39         int     green = 0;
40
41         if (hw_led_state & TIMER_LED)
42                 red = 1;
43         else if (hw_led_state & IDLE_LED)
44                 green = 1;
45         /* else both sides are disabled */
46
47         gpio_set_value(GPIO_LED_GREEN, green);
48         gpio_set_value(GPIO_LED_RED, red);
49 }
50
51 #endif
52
53 void osk_leds_event(led_event_t evt)
54 {
55         unsigned long   flags;
56         u16             leds;
57
58         local_irq_save(flags);
59
60         if (!(led_state & LED_STATE_ENABLED) && evt != led_start)
61                 goto done;
62
63         leds = hw_led_state;
64         switch (evt) {
65         case led_start:
66                 led_state |= LED_STATE_ENABLED;
67                 hw_led_state = 0;
68                 leds = ~0;
69                 break;
70
71         case led_halted:
72         case led_stop:
73                 led_state &= ~LED_STATE_ENABLED;
74                 hw_led_state = 0;
75                 break;
76
77         case led_claim:
78                 led_state |= LED_STATE_CLAIMED;
79                 hw_led_state = 0;
80                 leds = ~0;
81                 break;
82
83         case led_release:
84                 led_state &= ~LED_STATE_CLAIMED;
85                 hw_led_state = 0;
86                 break;
87
88 #ifdef  CONFIG_OMAP_OSK_MISTRAL
89
90         case led_timer:
91                 hw_led_state ^= TIMER_LED;
92                 mistral_setled();
93                 break;
94
95         case led_idle_start:    /* idle == off */
96                 hw_led_state &= ~IDLE_LED;
97                 mistral_setled();
98                 break;
99
100         case led_idle_end:
101                 hw_led_state |= IDLE_LED;
102                 mistral_setled();
103                 break;
104
105 #endif  /* CONFIG_OMAP_OSK_MISTRAL */
106
107         default:
108                 break;
109         }
110
111         leds ^= hw_led_state;
112
113 done:
114         local_irq_restore(flags);
115 }