Remove obsolete #include <linux/config.h>
[linux-3.10.git] / arch / arm / mach-omap1 / leds-osk.c
1 /*
2  * linux/arch/arm/mach-omap1/leds-osk.c
3  *
4  * LED driver for OSK, and optionally Mistral QVGA, boards
5  */
6 #include <linux/init.h>
7 #include <linux/workqueue.h>
8
9 #include <asm/hardware.h>
10 #include <asm/leds.h>
11 #include <asm/system.h>
12
13 #include <asm/arch/gpio.h>
14 #include <asm/arch/tps65010.h>
15
16 #include "leds.h"
17
18
19 #define LED_STATE_ENABLED       (1 << 0)
20 #define LED_STATE_CLAIMED       (1 << 1)
21 static u8 led_state;
22
23 #define GREEN_LED               (1 << 0)        /* TPS65010 LED1 */
24 #define AMBER_LED               (1 << 1)        /* TPS65010 LED2 */
25 #define RED_LED                 (1 << 2)        /* TPS65010 GPIO2 */
26 #define TIMER_LED               (1 << 3)        /* Mistral board */
27 #define IDLE_LED                (1 << 4)        /* Mistral board */
28 static u8 hw_led_state;
29
30
31 /* TPS65010 leds are changed using i2c -- from a task context.
32  * Using one of these for the "idle" LED would be impractical...
33  */
34 #define TPS_LEDS        (GREEN_LED | RED_LED | AMBER_LED)
35
36 static u8 tps_leds_change;
37
38 static void tps_work(void *unused)
39 {
40         for (;;) {
41                 u8      leds;
42
43                 local_irq_disable();
44                 leds = tps_leds_change;
45                 tps_leds_change = 0;
46                 local_irq_enable();
47
48                 if (!leds)
49                         break;
50
51                 /* careful:  the set_led() value is on/off/blink */
52                 if (leds & GREEN_LED)
53                         tps65010_set_led(LED1, !!(hw_led_state & GREEN_LED));
54                 if (leds & AMBER_LED)
55                         tps65010_set_led(LED2, !!(hw_led_state & AMBER_LED));
56
57                 /* the gpio led doesn't have that issue */
58                 if (leds & RED_LED)
59                         tps65010_set_gpio_out_value(GPIO2,
60                                         !(hw_led_state & RED_LED));
61         }
62 }
63
64 static DECLARE_WORK(work, tps_work, NULL);
65
66 #ifdef  CONFIG_OMAP_OSK_MISTRAL
67
68 /* For now, all system indicators require the Mistral board, since that
69  * LED can be manipulated without a task context.  This LED is either red,
70  * or green, but not both; it can't give the full "disco led" effect.
71  */
72
73 #define GPIO_LED_RED            3
74 #define GPIO_LED_GREEN          OMAP_MPUIO(4)
75
76 static void mistral_setled(void)
77 {
78         int     red = 0;
79         int     green = 0;
80
81         if (hw_led_state & TIMER_LED)
82                 red = 1;
83         else if (hw_led_state & IDLE_LED)
84                 green = 1;
85         // else both sides are disabled
86
87         omap_set_gpio_dataout(GPIO_LED_GREEN, green);
88         omap_set_gpio_dataout(GPIO_LED_RED, red);
89 }
90
91 #endif
92
93 void osk_leds_event(led_event_t evt)
94 {
95         unsigned long   flags;
96         u16             leds;
97
98         local_irq_save(flags);
99
100         if (!(led_state & LED_STATE_ENABLED) && evt != led_start)
101                 goto done;
102
103         leds = hw_led_state;
104         switch (evt) {
105         case led_start:
106                 led_state |= LED_STATE_ENABLED;
107                 hw_led_state = 0;
108                 leds = ~0;
109                 break;
110
111         case led_halted:
112         case led_stop:
113                 led_state &= ~LED_STATE_ENABLED;
114                 hw_led_state = 0;
115                 // NOTE:  work may still be pending!!
116                 break;
117
118         case led_claim:
119                 led_state |= LED_STATE_CLAIMED;
120                 hw_led_state = 0;
121                 leds = ~0;
122                 break;
123
124         case led_release:
125                 led_state &= ~LED_STATE_CLAIMED;
126                 hw_led_state = 0;
127                 break;
128
129 #ifdef  CONFIG_OMAP_OSK_MISTRAL
130
131         case led_timer:
132                 hw_led_state ^= TIMER_LED;
133                 mistral_setled();
134                 break;
135
136         case led_idle_start:
137                 hw_led_state |= IDLE_LED;
138                 mistral_setled();
139                 break;
140
141         case led_idle_end:
142                 hw_led_state &= ~IDLE_LED;
143                 mistral_setled();
144                 break;
145
146 #endif  /* CONFIG_OMAP_OSK_MISTRAL */
147
148         /* "green" == tps LED1 (leftmost, normally power-good)
149          * works only with DC adapter, not on battery power!
150          */
151         case led_green_on:
152                 if (led_state & LED_STATE_CLAIMED)
153                         hw_led_state |= GREEN_LED;
154                 break;
155         case led_green_off:
156                 if (led_state & LED_STATE_CLAIMED)
157                         hw_led_state &= ~GREEN_LED;
158                 break;
159
160         /* "amber" == tps LED2 (middle) */
161         case led_amber_on:
162                 if (led_state & LED_STATE_CLAIMED)
163                         hw_led_state |= AMBER_LED;
164                 break;
165         case led_amber_off:
166                 if (led_state & LED_STATE_CLAIMED)
167                         hw_led_state &= ~AMBER_LED;
168                 break;
169
170         /* "red" == LED on tps gpio3 (rightmost) */
171         case led_red_on:
172                 if (led_state & LED_STATE_CLAIMED)
173                         hw_led_state |= RED_LED;
174                 break;
175         case led_red_off:
176                 if (led_state & LED_STATE_CLAIMED)
177                         hw_led_state &= ~RED_LED;
178                 break;
179
180         default:
181                 break;
182         }
183
184         leds ^= hw_led_state;
185         leds &= TPS_LEDS;
186         if (leds && (led_state & LED_STATE_CLAIMED)) {
187                 tps_leds_change |= leds;
188                 schedule_work(&work);
189         }
190
191 done:
192         local_irq_restore(flags);
193 }