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1da177e4 LT |
1 | /* |
2 | * linux/arch/arm/mach-sa1100/leds-hackkit.c | |
3 | * | |
4 | * based on leds-lart.c | |
5 | * | |
6 | * (C) Erik Mouw (J.A.K.Mouw@its.tudelft.nl), April 21, 2000 | |
7 | * (C) Stefan Eletzhofer <stefan.eletzhofer@eletztrick.de>, 2002 | |
8 | * | |
9 | * The HackKit has two leds (GPIO 22/23). The red led (gpio 22) is used | |
10 | * as cpu led, the green one is used as timer led. | |
11 | */ | |
1da177e4 LT |
12 | #include <linux/init.h> |
13 | ||
a09e64fb | 14 | #include <mach/hardware.h> |
1da177e4 LT |
15 | #include <asm/leds.h> |
16 | #include <asm/system.h> | |
17 | ||
18 | #include "leds.h" | |
19 | ||
20 | ||
21 | #define LED_STATE_ENABLED 1 | |
22 | #define LED_STATE_CLAIMED 2 | |
23 | ||
24 | static unsigned int led_state; | |
25 | static unsigned int hw_led_state; | |
26 | ||
27 | #define LED_GREEN GPIO_GPIO23 | |
28 | #define LED_RED GPIO_GPIO22 | |
29 | #define LED_MASK (LED_RED | LED_GREEN) | |
30 | ||
31 | void hackkit_leds_event(led_event_t evt) | |
32 | { | |
33 | unsigned long flags; | |
34 | ||
35 | local_irq_save(flags); | |
36 | ||
37 | switch(evt) { | |
38 | case led_start: | |
39 | /* pin 22/23 are outputs */ | |
40 | GPDR |= LED_MASK; | |
41 | hw_led_state = LED_MASK; | |
42 | led_state = LED_STATE_ENABLED; | |
43 | break; | |
44 | ||
45 | case led_stop: | |
46 | led_state &= ~LED_STATE_ENABLED; | |
47 | break; | |
48 | ||
49 | case led_claim: | |
50 | led_state |= LED_STATE_CLAIMED; | |
51 | hw_led_state = LED_MASK; | |
52 | break; | |
53 | ||
54 | case led_release: | |
55 | led_state &= ~LED_STATE_CLAIMED; | |
56 | hw_led_state = LED_MASK; | |
57 | break; | |
58 | ||
59 | #ifdef CONFIG_LEDS_TIMER | |
60 | case led_timer: | |
61 | if (!(led_state & LED_STATE_CLAIMED)) | |
62 | hw_led_state ^= LED_GREEN; | |
63 | break; | |
64 | #endif | |
65 | ||
66 | #ifdef CONFIG_LEDS_CPU | |
67 | case led_idle_start: | |
68 | /* The LART people like the LED to be off when the | |
69 | system is idle... */ | |
70 | if (!(led_state & LED_STATE_CLAIMED)) | |
71 | hw_led_state &= ~LED_RED; | |
72 | break; | |
73 | ||
74 | case led_idle_end: | |
75 | /* ... and on if the system is not idle */ | |
76 | if (!(led_state & LED_STATE_CLAIMED)) | |
77 | hw_led_state |= LED_RED; | |
78 | break; | |
79 | #endif | |
80 | ||
81 | case led_red_on: | |
82 | if (led_state & LED_STATE_CLAIMED) | |
83 | hw_led_state &= ~LED_RED; | |
84 | break; | |
85 | ||
86 | case led_red_off: | |
87 | if (led_state & LED_STATE_CLAIMED) | |
88 | hw_led_state |= LED_RED; | |
89 | break; | |
90 | ||
91 | case led_green_on: | |
92 | if (led_state & LED_STATE_CLAIMED) | |
93 | hw_led_state &= ~LED_GREEN; | |
94 | break; | |
95 | ||
96 | case led_green_off: | |
97 | if (led_state & LED_STATE_CLAIMED) | |
98 | hw_led_state |= LED_GREEN; | |
99 | break; | |
100 | ||
101 | default: | |
102 | break; | |
103 | } | |
104 | ||
105 | /* Now set the GPIO state, or nothing will happen at all */ | |
106 | if (led_state & LED_STATE_ENABLED) { | |
107 | GPSR = hw_led_state; | |
108 | GPCR = hw_led_state ^ LED_MASK; | |
109 | } | |
110 | ||
111 | local_irq_restore(flags); | |
112 | } |