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gerrit-public.fairphone.software / kernel / msm-4.9 / 0e6dcde7288f1de8e2a5896349342de5d316d3cb / . / arch / arm / mach-pxa / leds-lubbock.c
blob: 0bd85c884a7c39dcfdfe2bbb39c551240e77bf8c [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1/*
2 * linux/arch/arm/mach-pxa/leds-lubbock.c
3 *
4 * Copyright (C) 2000 John Dorsey <john+@cs.cmu.edu>
5 *
6 * Copyright (c) 2001 Jeff Sutherland <jeffs@accelent.com>
7 *
8 * Original (leds-footbridge.c) by Russell King
9 *
10 * Major surgery on April 2004 by Nicolas Pitre for less global
11 * namespace collision. Mostly adapted the Mainstone version.
12 */
13
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]14#include <linux/init.h>
15
Russell Kinga09e64f2008-08-05 16:14:15 +0100[diff] [blame]16#include <mach/hardware.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]17#include <asm/leds.h>
Eric Miao51c62982009-01-02 23:17:22 +0800[diff] [blame]18#include <mach/pxa25x.h>
Russell Kinga09e64f2008-08-05 16:14:15 +0100[diff] [blame]19#include <mach/lubbock.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]20
21#include "leds.h"
22
23/*
24 * 8 discrete leds available for general use:
25 *
26 * Note: bits [15-8] are used to enable/blank the 8 7 segment hex displays
27 * so be sure to not monkey with them here.
28 */
29
30#define D28 (1 << 0)
31#define D27 (1 << 1)
32#define D26 (1 << 2)
33#define D25 (1 << 3)
34#define D24 (1 << 4)
35#define D23 (1 << 5)
36#define D22 (1 << 6)
37#define D21 (1 << 7)
38
39#define LED_STATE_ENABLED 1
40#define LED_STATE_CLAIMED 2
41
42static unsigned int led_state;
43static unsigned int hw_led_state;
44
45void lubbock_leds_event(led_event_t evt)
46{
47 unsigned long flags;
48
49 local_irq_save(flags);
50
51 switch (evt) {
52 case led_start:
53 hw_led_state = 0;
54 led_state = LED_STATE_ENABLED;
55 break;
56
57 case led_stop:
58 led_state &= ~LED_STATE_ENABLED;
59 break;
60
61 case led_claim:
62 led_state |= LED_STATE_CLAIMED;
63 hw_led_state = 0;
64 break;
65
66 case led_release:
67 led_state &= ~LED_STATE_CLAIMED;
68 hw_led_state = 0;
69 break;
70
71#ifdef CONFIG_LEDS_TIMER
72 case led_timer:
73 hw_led_state ^= D26;
74 break;
75#endif
76
77#ifdef CONFIG_LEDS_CPU
78 case led_idle_start:
79 hw_led_state &= ~D27;
80 break;
81
82 case led_idle_end:
83 hw_led_state |= D27;
84 break;
85#endif
86
87 case led_halted:
88 break;
89
90 case led_green_on:
91 hw_led_state |= D21;
92 break;
93
94 case led_green_off:
95 hw_led_state &= ~D21;
96 break;
97
98 case led_amber_on:
99 hw_led_state |= D22;
100 break;
101
102 case led_amber_off:
103 hw_led_state &= ~D22;
104 break;
105
106 case led_red_on:
107 hw_led_state |= D23;
108 break;
109
110 case led_red_off:
111 hw_led_state &= ~D23;
112 break;
113
114 default:
115 break;
116 }
117
118 if (led_state & LED_STATE_ENABLED)
119 LUB_DISC_BLNK_LED = (LUB_DISC_BLNK_LED | 0xff) & ~hw_led_state;
120 else
121 LUB_DISC_BLNK_LED |= 0xff;
122
123 local_irq_restore(flags);
124}