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gerrit-public.fairphone.software / kernel / msm-5.4 / a7918f39bbe59fe76f43743bdb6bb8b0bdefd94a / . / arch / arm / mach-omap1 / leds-h2p2-debug.c
blob: 399010c140369e31d40c85cca9166d260de8dd76 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1/*
Tony Lindgren7c38cf02005-09-08 23:07:38 +0100[diff] [blame]2 * linux/arch/arm/mach-omap1/leds-h2p2-debug.c
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]3 *
4 * Copyright 2003 by Texas Instruments Incorporated
5 *
6 * There are 16 LEDs on the debug board (all green); four may be used
7 * for logical 'green', 'amber', 'red', and 'blue' (after "claiming").
8 *
9 * The "surfer" expansion board and H2 sample board also have two-color
10 * green+red LEDs (in parallel), used here for timer and idle indicators.
11 */
12#include <linux/config.h>
13#include <linux/init.h>
14#include <linux/kernel_stat.h>
15#include <linux/sched.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]16
17#include <asm/io.h>
18#include <asm/hardware.h>
19#include <asm/leds.h>
20#include <asm/system.h>
21
22#include <asm/arch/fpga.h>
23#include <asm/arch/gpio.h>
24
25#include "leds.h"
26
27
28#define GPIO_LED_RED 3
29#define GPIO_LED_GREEN OMAP_MPUIO(4)
30
31
32#define LED_STATE_ENABLED 0x01
33#define LED_STATE_CLAIMED 0x02
34#define LED_TIMER_ON 0x04
35
36#define GPIO_IDLE GPIO_LED_GREEN
37#define GPIO_TIMER GPIO_LED_RED
38
39
40void h2p2_dbg_leds_event(led_event_t evt)
41{
42 unsigned long flags;
43
44 static struct h2p2_dbg_fpga __iomem *fpga;
45 static u16 led_state, hw_led_state;
46
47 local_irq_save(flags);
48
49 if (!(led_state & LED_STATE_ENABLED) && evt != led_start)
50 goto done;
51
52 switch (evt) {
53 case led_start:
54 if (!fpga)
55 fpga = ioremap(H2P2_DBG_FPGA_START,
56 H2P2_DBG_FPGA_SIZE);
57 if (fpga) {
58 led_state |= LED_STATE_ENABLED;
59 __raw_writew(~0, &fpga->leds);
60 }
61 break;
62
63 case led_stop:
64 case led_halted:
65 /* all leds off during suspend or shutdown */
66 omap_set_gpio_dataout(GPIO_TIMER, 0);
67 omap_set_gpio_dataout(GPIO_IDLE, 0);
68 __raw_writew(~0, &fpga->leds);
69 led_state &= ~LED_STATE_ENABLED;
70 if (evt == led_halted) {
71 iounmap(fpga);
72 fpga = NULL;
73 }
74 goto done;
75
76 case led_claim:
77 led_state |= LED_STATE_CLAIMED;
78 hw_led_state = 0;
79 break;
80
81 case led_release:
82 led_state &= ~LED_STATE_CLAIMED;
83 break;
84
85#ifdef CONFIG_LEDS_TIMER
86 case led_timer:
87 led_state ^= LED_TIMER_ON;
88 omap_set_gpio_dataout(GPIO_TIMER, led_state & LED_TIMER_ON);
89 goto done;
90#endif
91
92#ifdef CONFIG_LEDS_CPU
93 case led_idle_start:
94 omap_set_gpio_dataout(GPIO_IDLE, 1);
95 goto done;
96
97 case led_idle_end:
98 omap_set_gpio_dataout(GPIO_IDLE, 0);
99 goto done;
100#endif
101
102 case led_green_on:
103 hw_led_state |= H2P2_DBG_FPGA_LED_GREEN;
104 break;
105 case led_green_off:
106 hw_led_state &= ~H2P2_DBG_FPGA_LED_GREEN;
107 break;
108
109 case led_amber_on:
110 hw_led_state |= H2P2_DBG_FPGA_LED_AMBER;
111 break;
112 case led_amber_off:
113 hw_led_state &= ~H2P2_DBG_FPGA_LED_AMBER;
114 break;
115
116 case led_red_on:
117 hw_led_state |= H2P2_DBG_FPGA_LED_RED;
118 break;
119 case led_red_off:
120 hw_led_state &= ~H2P2_DBG_FPGA_LED_RED;
121 break;
122
123 case led_blue_on:
124 hw_led_state |= H2P2_DBG_FPGA_LED_BLUE;
125 break;
126 case led_blue_off:
127 hw_led_state &= ~H2P2_DBG_FPGA_LED_BLUE;
128 break;
129
130 default:
131 break;
132 }
133
134
135 /*
136 * Actually burn the LEDs
137 */
138 if (led_state & LED_STATE_CLAIMED)
139 __raw_writew(~hw_led_state, &fpga->leds);
140
141done:
142 local_irq_restore(flags);
143}