blob: 71fe2cc7f7cf536e28725214c979339369086c9c [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Tony Lindgren7c38cf02005-09-08 23:07:38 +01002 * linux/arch/arm/mach-omap1/leds-h2p2-debug.c
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 *
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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#include <linux/init.h>
13#include <linux/kernel_stat.h>
14#include <linux/sched.h>
Russell Kingfced80c2008-09-06 12:10:45 +010015#include <linux/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016
Russell Kinga09e64f2008-08-05 16:14:15 +010017#include <mach/hardware.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include <asm/leds.h>
19#include <asm/system.h>
Tony Lindgren3179a012005-11-10 14:26:48 +000020#include <asm/mach-types.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070021
Russell Kinga09e64f2008-08-05 16:14:15 +010022#include <mach/fpga.h>
23#include <mach/gpio.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024
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 */
Tony Lindgren3179a012005-11-10 14:26:48 +000066
67 if (! machine_is_omap_perseus2()) {
68 omap_set_gpio_dataout(GPIO_TIMER, 0);
69 omap_set_gpio_dataout(GPIO_IDLE, 0);
70 }
71
Linus Torvalds1da177e2005-04-16 15:20:36 -070072 __raw_writew(~0, &fpga->leds);
73 led_state &= ~LED_STATE_ENABLED;
74 if (evt == led_halted) {
75 iounmap(fpga);
76 fpga = NULL;
77 }
Tony Lindgren3179a012005-11-10 14:26:48 +000078
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 goto done;
80
81 case led_claim:
82 led_state |= LED_STATE_CLAIMED;
83 hw_led_state = 0;
84 break;
85
86 case led_release:
87 led_state &= ~LED_STATE_CLAIMED;
88 break;
89
90#ifdef CONFIG_LEDS_TIMER
91 case led_timer:
92 led_state ^= LED_TIMER_ON;
Tony Lindgren3179a012005-11-10 14:26:48 +000093
94 if (machine_is_omap_perseus2())
95 hw_led_state ^= H2P2_DBG_FPGA_P2_LED_TIMER;
96 else {
97 omap_set_gpio_dataout(GPIO_TIMER, led_state & LED_TIMER_ON);
98 goto done;
99 }
100
101 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102#endif
103
104#ifdef CONFIG_LEDS_CPU
105 case led_idle_start:
Tony Lindgren3179a012005-11-10 14:26:48 +0000106 if (machine_is_omap_perseus2())
107 hw_led_state |= H2P2_DBG_FPGA_P2_LED_IDLE;
108 else {
109 omap_set_gpio_dataout(GPIO_IDLE, 1);
110 goto done;
111 }
112
113 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114
115 case led_idle_end:
Tony Lindgren3179a012005-11-10 14:26:48 +0000116 if (machine_is_omap_perseus2())
117 hw_led_state &= ~H2P2_DBG_FPGA_P2_LED_IDLE;
118 else {
119 omap_set_gpio_dataout(GPIO_IDLE, 0);
120 goto done;
121 }
122
123 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124#endif
125
126 case led_green_on:
127 hw_led_state |= H2P2_DBG_FPGA_LED_GREEN;
128 break;
129 case led_green_off:
130 hw_led_state &= ~H2P2_DBG_FPGA_LED_GREEN;
131 break;
132
133 case led_amber_on:
134 hw_led_state |= H2P2_DBG_FPGA_LED_AMBER;
135 break;
136 case led_amber_off:
137 hw_led_state &= ~H2P2_DBG_FPGA_LED_AMBER;
138 break;
139
140 case led_red_on:
141 hw_led_state |= H2P2_DBG_FPGA_LED_RED;
142 break;
143 case led_red_off:
144 hw_led_state &= ~H2P2_DBG_FPGA_LED_RED;
145 break;
146
147 case led_blue_on:
148 hw_led_state |= H2P2_DBG_FPGA_LED_BLUE;
149 break;
150 case led_blue_off:
151 hw_led_state &= ~H2P2_DBG_FPGA_LED_BLUE;
152 break;
153
154 default:
155 break;
156 }
157
158
159 /*
160 * Actually burn the LEDs
161 */
Tony Lindgren3179a012005-11-10 14:26:48 +0000162 if (led_state & LED_STATE_ENABLED)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 __raw_writew(~hw_led_state, &fpga->leds);
164
165done:
166 local_irq_restore(flags);
167}