Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/arch/arm/mach-footbridge/ebsa285.c | |
3 | * | |
4 | * EBSA285 machine fixup | |
5 | */ | |
6 | #include <linux/init.h> | |
43024ed6 | 7 | #include <linux/io.h> |
70d13e08 | 8 | #include <linux/spinlock.h> |
cf6856d6 BW |
9 | #include <linux/slab.h> |
10 | #include <linux/leds.h> | |
1da177e4 LT |
11 | |
12 | #include <asm/hardware/dec21285.h> | |
13 | #include <asm/mach-types.h> | |
14 | ||
15 | #include <asm/mach/arch.h> | |
16 | ||
17 | #include "common.h" | |
18 | ||
cf6856d6 BW |
19 | /* LEDs */ |
20 | #if defined(CONFIG_NEW_LEDS) && defined(CONFIG_LEDS_CLASS) | |
43024ed6 RK |
21 | #define XBUS_AMBER_L BIT(0) |
22 | #define XBUS_GREEN_L BIT(1) | |
23 | #define XBUS_RED_L BIT(2) | |
24 | #define XBUS_TOGGLE BIT(7) | |
25 | ||
cf6856d6 BW |
26 | struct ebsa285_led { |
27 | struct led_classdev cdev; | |
28 | u8 mask; | |
29 | }; | |
30 | ||
31 | /* | |
32 | * The triggers lines up below will only be used if the | |
33 | * LED triggers are compiled in. | |
34 | */ | |
35 | static const struct { | |
36 | const char *name; | |
37 | const char *trigger; | |
38 | } ebsa285_leds[] = { | |
67130c54 RK |
39 | { "ebsa285:amber", "cpu0", }, |
40 | { "ebsa285:green", "heartbeat", }, | |
cf6856d6 BW |
41 | { "ebsa285:red",}, |
42 | }; | |
43 | ||
67130c54 | 44 | static unsigned char hw_led_state; |
43024ed6 | 45 | static void __iomem *xbus; |
67130c54 | 46 | |
cf6856d6 BW |
47 | static void ebsa285_led_set(struct led_classdev *cdev, |
48 | enum led_brightness b) | |
49 | { | |
50 | struct ebsa285_led *led = container_of(cdev, | |
51 | struct ebsa285_led, cdev); | |
52 | ||
67130c54 RK |
53 | if (b == LED_OFF) |
54 | hw_led_state |= led->mask; | |
cf6856d6 | 55 | else |
67130c54 | 56 | hw_led_state &= ~led->mask; |
43024ed6 | 57 | writeb(hw_led_state, xbus); |
cf6856d6 BW |
58 | } |
59 | ||
60 | static enum led_brightness ebsa285_led_get(struct led_classdev *cdev) | |
61 | { | |
62 | struct ebsa285_led *led = container_of(cdev, | |
63 | struct ebsa285_led, cdev); | |
64 | ||
67130c54 | 65 | return hw_led_state & led->mask ? LED_OFF : LED_FULL; |
cf6856d6 BW |
66 | } |
67 | ||
68 | static int __init ebsa285_leds_init(void) | |
69 | { | |
70 | int i; | |
71 | ||
67130c54 | 72 | if (!machine_is_ebsa285()) |
cf6856d6 BW |
73 | return -ENODEV; |
74 | ||
43024ed6 RK |
75 | xbus = ioremap(XBUS_CS2, SZ_4K); |
76 | if (!xbus) | |
77 | return -ENOMEM; | |
78 | ||
67130c54 | 79 | /* 3 LEDS all off */ |
43024ed6 RK |
80 | hw_led_state = XBUS_AMBER_L | XBUS_GREEN_L | XBUS_RED_L; |
81 | writeb(hw_led_state, xbus); | |
cf6856d6 BW |
82 | |
83 | for (i = 0; i < ARRAY_SIZE(ebsa285_leds); i++) { | |
84 | struct ebsa285_led *led; | |
85 | ||
86 | led = kzalloc(sizeof(*led), GFP_KERNEL); | |
87 | if (!led) | |
88 | break; | |
89 | ||
90 | led->cdev.name = ebsa285_leds[i].name; | |
91 | led->cdev.brightness_set = ebsa285_led_set; | |
92 | led->cdev.brightness_get = ebsa285_led_get; | |
93 | led->cdev.default_trigger = ebsa285_leds[i].trigger; | |
94 | led->mask = BIT(i); | |
95 | ||
96 | if (led_classdev_register(NULL, &led->cdev) < 0) { | |
97 | kfree(led); | |
98 | break; | |
99 | } | |
100 | } | |
101 | ||
102 | return 0; | |
103 | } | |
104 | ||
105 | /* | |
106 | * Since we may have triggers on any subsystem, defer registration | |
107 | * until after subsystem_init. | |
108 | */ | |
109 | fs_initcall(ebsa285_leds_init); | |
110 | #endif | |
111 | ||
1da177e4 | 112 | MACHINE_START(EBSA285, "EBSA285") |
e9dea0c6 | 113 | /* Maintainer: Russell King */ |
93ef8883 | 114 | .atag_offset = 0x100, |
e9dea0c6 RK |
115 | .video_start = 0x000a0000, |
116 | .video_end = 0x000bffff, | |
117 | .map_io = footbridge_map_io, | |
6cefe92f | 118 | .init_early = footbridge_sched_clock, |
e9dea0c6 | 119 | .init_irq = footbridge_init_irq, |
6bb27d73 | 120 | .init_time = footbridge_timer_init, |
6fca1e17 | 121 | .restart = footbridge_restart, |
1da177e4 LT |
122 | MACHINE_END |
123 |