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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* |
3 | * linux/arch/arm/mach-footbridge/ebsa285.c | |
4 | * | |
5 | * EBSA285 machine fixup | |
6 | */ | |
7 | #include <linux/init.h> | |
43024ed6 | 8 | #include <linux/io.h> |
70d13e08 | 9 | #include <linux/spinlock.h> |
cf6856d6 BW |
10 | #include <linux/slab.h> |
11 | #include <linux/leds.h> | |
1da177e4 LT |
12 | |
13 | #include <asm/hardware/dec21285.h> | |
14 | #include <asm/mach-types.h> | |
15 | ||
16 | #include <asm/mach/arch.h> | |
17 | ||
18 | #include "common.h" | |
19 | ||
cf6856d6 BW |
20 | /* LEDs */ |
21 | #if defined(CONFIG_NEW_LEDS) && defined(CONFIG_LEDS_CLASS) | |
43024ed6 RK |
22 | #define XBUS_AMBER_L BIT(0) |
23 | #define XBUS_GREEN_L BIT(1) | |
24 | #define XBUS_RED_L BIT(2) | |
25 | #define XBUS_TOGGLE BIT(7) | |
26 | ||
cf6856d6 BW |
27 | struct ebsa285_led { |
28 | struct led_classdev cdev; | |
29 | u8 mask; | |
30 | }; | |
31 | ||
32 | /* | |
33 | * The triggers lines up below will only be used if the | |
34 | * LED triggers are compiled in. | |
35 | */ | |
36 | static const struct { | |
37 | const char *name; | |
38 | const char *trigger; | |
39 | } ebsa285_leds[] = { | |
67130c54 RK |
40 | { "ebsa285:amber", "cpu0", }, |
41 | { "ebsa285:green", "heartbeat", }, | |
cf6856d6 BW |
42 | { "ebsa285:red",}, |
43 | }; | |
44 | ||
67130c54 | 45 | static unsigned char hw_led_state; |
43024ed6 | 46 | static void __iomem *xbus; |
67130c54 | 47 | |
cf6856d6 BW |
48 | static void ebsa285_led_set(struct led_classdev *cdev, |
49 | enum led_brightness b) | |
50 | { | |
51 | struct ebsa285_led *led = container_of(cdev, | |
52 | struct ebsa285_led, cdev); | |
53 | ||
67130c54 RK |
54 | if (b == LED_OFF) |
55 | hw_led_state |= led->mask; | |
cf6856d6 | 56 | else |
67130c54 | 57 | hw_led_state &= ~led->mask; |
43024ed6 | 58 | writeb(hw_led_state, xbus); |
cf6856d6 BW |
59 | } |
60 | ||
61 | static enum led_brightness ebsa285_led_get(struct led_classdev *cdev) | |
62 | { | |
63 | struct ebsa285_led *led = container_of(cdev, | |
64 | struct ebsa285_led, cdev); | |
65 | ||
67130c54 | 66 | return hw_led_state & led->mask ? LED_OFF : LED_FULL; |
cf6856d6 BW |
67 | } |
68 | ||
69 | static int __init ebsa285_leds_init(void) | |
70 | { | |
71 | int i; | |
72 | ||
67130c54 | 73 | if (!machine_is_ebsa285()) |
cf6856d6 BW |
74 | return -ENODEV; |
75 | ||
43024ed6 RK |
76 | xbus = ioremap(XBUS_CS2, SZ_4K); |
77 | if (!xbus) | |
78 | return -ENOMEM; | |
79 | ||
67130c54 | 80 | /* 3 LEDS all off */ |
43024ed6 RK |
81 | hw_led_state = XBUS_AMBER_L | XBUS_GREEN_L | XBUS_RED_L; |
82 | writeb(hw_led_state, xbus); | |
cf6856d6 BW |
83 | |
84 | for (i = 0; i < ARRAY_SIZE(ebsa285_leds); i++) { | |
85 | struct ebsa285_led *led; | |
86 | ||
87 | led = kzalloc(sizeof(*led), GFP_KERNEL); | |
88 | if (!led) | |
89 | break; | |
90 | ||
91 | led->cdev.name = ebsa285_leds[i].name; | |
92 | led->cdev.brightness_set = ebsa285_led_set; | |
93 | led->cdev.brightness_get = ebsa285_led_get; | |
94 | led->cdev.default_trigger = ebsa285_leds[i].trigger; | |
95 | led->mask = BIT(i); | |
96 | ||
97 | if (led_classdev_register(NULL, &led->cdev) < 0) { | |
98 | kfree(led); | |
99 | break; | |
100 | } | |
101 | } | |
102 | ||
103 | return 0; | |
104 | } | |
105 | ||
106 | /* | |
107 | * Since we may have triggers on any subsystem, defer registration | |
108 | * until after subsystem_init. | |
109 | */ | |
110 | fs_initcall(ebsa285_leds_init); | |
111 | #endif | |
112 | ||
1da177e4 | 113 | MACHINE_START(EBSA285, "EBSA285") |
e9dea0c6 | 114 | /* Maintainer: Russell King */ |
93ef8883 | 115 | .atag_offset = 0x100, |
e9dea0c6 RK |
116 | .video_start = 0x000a0000, |
117 | .video_end = 0x000bffff, | |
118 | .map_io = footbridge_map_io, | |
6cefe92f | 119 | .init_early = footbridge_sched_clock, |
e9dea0c6 | 120 | .init_irq = footbridge_init_irq, |
6bb27d73 | 121 | .init_time = footbridge_timer_init, |
6fca1e17 | 122 | .restart = footbridge_restart, |
1da177e4 LT |
123 | MACHINE_END |
124 |