Commit | Line | Data |
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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 | */ | |
12 | #include <linux/config.h> | |
13 | #include <linux/init.h> | |
14 | ||
15 | #include <asm/hardware.h> | |
16 | #include <asm/leds.h> | |
17 | #include <asm/system.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 LED_GREEN GPIO_GPIO23 | |
29 | #define LED_RED GPIO_GPIO22 | |
30 | #define LED_MASK (LED_RED | LED_GREEN) | |
31 | ||
32 | void hackkit_leds_event(led_event_t evt) | |
33 | { | |
34 | unsigned long flags; | |
35 | ||
36 | local_irq_save(flags); | |
37 | ||
38 | switch(evt) { | |
39 | case led_start: | |
40 | /* pin 22/23 are outputs */ | |
41 | GPDR |= LED_MASK; | |
42 | hw_led_state = LED_MASK; | |
43 | led_state = LED_STATE_ENABLED; | |
44 | break; | |
45 | ||
46 | case led_stop: | |
47 | led_state &= ~LED_STATE_ENABLED; | |
48 | break; | |
49 | ||
50 | case led_claim: | |
51 | led_state |= LED_STATE_CLAIMED; | |
52 | hw_led_state = LED_MASK; | |
53 | break; | |
54 | ||
55 | case led_release: | |
56 | led_state &= ~LED_STATE_CLAIMED; | |
57 | hw_led_state = LED_MASK; | |
58 | break; | |
59 | ||
60 | #ifdef CONFIG_LEDS_TIMER | |
61 | case led_timer: | |
62 | if (!(led_state & LED_STATE_CLAIMED)) | |
63 | hw_led_state ^= LED_GREEN; | |
64 | break; | |
65 | #endif | |
66 | ||
67 | #ifdef CONFIG_LEDS_CPU | |
68 | case led_idle_start: | |
69 | /* The LART people like the LED to be off when the | |
70 | system is idle... */ | |
71 | if (!(led_state & LED_STATE_CLAIMED)) | |
72 | hw_led_state &= ~LED_RED; | |
73 | break; | |
74 | ||
75 | case led_idle_end: | |
76 | /* ... and on if the system is not idle */ | |
77 | if (!(led_state & LED_STATE_CLAIMED)) | |
78 | hw_led_state |= LED_RED; | |
79 | break; | |
80 | #endif | |
81 | ||
82 | case led_red_on: | |
83 | if (led_state & LED_STATE_CLAIMED) | |
84 | hw_led_state &= ~LED_RED; | |
85 | break; | |
86 | ||
87 | case led_red_off: | |
88 | if (led_state & LED_STATE_CLAIMED) | |
89 | hw_led_state |= LED_RED; | |
90 | break; | |
91 | ||
92 | case led_green_on: | |
93 | if (led_state & LED_STATE_CLAIMED) | |
94 | hw_led_state &= ~LED_GREEN; | |
95 | break; | |
96 | ||
97 | case led_green_off: | |
98 | if (led_state & LED_STATE_CLAIMED) | |
99 | hw_led_state |= LED_GREEN; | |
100 | break; | |
101 | ||
102 | default: | |
103 | break; | |
104 | } | |
105 | ||
106 | /* Now set the GPIO state, or nothing will happen at all */ | |
107 | if (led_state & LED_STATE_ENABLED) { | |
108 | GPSR = hw_led_state; | |
109 | GPCR = hw_led_state ^ LED_MASK; | |
110 | } | |
111 | ||
112 | local_irq_restore(flags); | |
113 | } |