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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 */
Russell King2f8163b2011-07-26 10:53:52 +010012#include <linux/gpio.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070013#include <linux/init.h>
14#include <linux/kernel_stat.h>
15#include <linux/sched.h>
Russell Kingfced80c2008-09-06 12:10:45 +010016#include <linux/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017
Russell Kinga09e64f2008-08-05 16:14:15 +010018#include <mach/hardware.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#include <asm/leds.h>
Tony Lindgren3179a012005-11-10 14:26:48 +000020#include <asm/mach-types.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070021
Tony Lindgrence491cf2009-10-20 09:40:47 -070022#include <plat/fpga.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070023
24#include "leds.h"
25
26
27#define GPIO_LED_RED 3
28#define GPIO_LED_GREEN OMAP_MPUIO(4)
29
30
31#define LED_STATE_ENABLED 0x01
32#define LED_STATE_CLAIMED 0x02
33#define LED_TIMER_ON 0x04
34
35#define GPIO_IDLE GPIO_LED_GREEN
36#define GPIO_TIMER GPIO_LED_RED
37
38
39void h2p2_dbg_leds_event(led_event_t evt)
40{
41 unsigned long flags;
42
43 static struct h2p2_dbg_fpga __iomem *fpga;
44 static u16 led_state, hw_led_state;
45
46 local_irq_save(flags);
47
48 if (!(led_state & LED_STATE_ENABLED) && evt != led_start)
49 goto done;
50
51 switch (evt) {
52 case led_start:
53 if (!fpga)
54 fpga = ioremap(H2P2_DBG_FPGA_START,
55 H2P2_DBG_FPGA_SIZE);
56 if (fpga) {
57 led_state |= LED_STATE_ENABLED;
58 __raw_writew(~0, &fpga->leds);
59 }
60 break;
61
62 case led_stop:
63 case led_halted:
64 /* all leds off during suspend or shutdown */
Tony Lindgren3179a012005-11-10 14:26:48 +000065
66 if (! machine_is_omap_perseus2()) {
David Brownell0b84b5c2008-12-10 17:35:25 -080067 gpio_set_value(GPIO_TIMER, 0);
68 gpio_set_value(GPIO_IDLE, 0);
Tony Lindgren3179a012005-11-10 14:26:48 +000069 }
70
Linus Torvalds1da177e2005-04-16 15:20:36 -070071 led_state &= ~LED_STATE_ENABLED;
Paul Walmsleya032d332012-08-03 09:21:10 -060072 if (fpga) {
73 __raw_writew(~0, &fpga->leds);
74 if (evt == led_halted) {
75 iounmap(fpga);
76 fpga = NULL;
77 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070078 }
Tony Lindgren3179a012005-11-10 14:26:48 +000079
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 goto done;
81
82 case led_claim:
83 led_state |= LED_STATE_CLAIMED;
84 hw_led_state = 0;
85 break;
86
87 case led_release:
88 led_state &= ~LED_STATE_CLAIMED;
89 break;
90
91#ifdef CONFIG_LEDS_TIMER
92 case led_timer:
93 led_state ^= LED_TIMER_ON;
Tony Lindgren3179a012005-11-10 14:26:48 +000094
95 if (machine_is_omap_perseus2())
96 hw_led_state ^= H2P2_DBG_FPGA_P2_LED_TIMER;
97 else {
David Brownell0b84b5c2008-12-10 17:35:25 -080098 gpio_set_value(GPIO_TIMER, led_state & LED_TIMER_ON);
Tony Lindgren3179a012005-11-10 14:26:48 +000099 goto done;
100 }
101
102 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103#endif
104
105#ifdef CONFIG_LEDS_CPU
106 case led_idle_start:
Tony Lindgren3179a012005-11-10 14:26:48 +0000107 if (machine_is_omap_perseus2())
108 hw_led_state |= H2P2_DBG_FPGA_P2_LED_IDLE;
109 else {
David Brownell0b84b5c2008-12-10 17:35:25 -0800110 gpio_set_value(GPIO_IDLE, 1);
Tony Lindgren3179a012005-11-10 14:26:48 +0000111 goto done;
112 }
113
114 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115
116 case led_idle_end:
Tony Lindgren3179a012005-11-10 14:26:48 +0000117 if (machine_is_omap_perseus2())
118 hw_led_state &= ~H2P2_DBG_FPGA_P2_LED_IDLE;
119 else {
David Brownell0b84b5c2008-12-10 17:35:25 -0800120 gpio_set_value(GPIO_IDLE, 0);
Tony Lindgren3179a012005-11-10 14:26:48 +0000121 goto done;
122 }
123
124 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125#endif
126
127 case led_green_on:
128 hw_led_state |= H2P2_DBG_FPGA_LED_GREEN;
129 break;
130 case led_green_off:
131 hw_led_state &= ~H2P2_DBG_FPGA_LED_GREEN;
132 break;
133
134 case led_amber_on:
135 hw_led_state |= H2P2_DBG_FPGA_LED_AMBER;
136 break;
137 case led_amber_off:
138 hw_led_state &= ~H2P2_DBG_FPGA_LED_AMBER;
139 break;
140
141 case led_red_on:
142 hw_led_state |= H2P2_DBG_FPGA_LED_RED;
143 break;
144 case led_red_off:
145 hw_led_state &= ~H2P2_DBG_FPGA_LED_RED;
146 break;
147
148 case led_blue_on:
149 hw_led_state |= H2P2_DBG_FPGA_LED_BLUE;
150 break;
151 case led_blue_off:
152 hw_led_state &= ~H2P2_DBG_FPGA_LED_BLUE;
153 break;
154
155 default:
156 break;
157 }
158
159
160 /*
161 * Actually burn the LEDs
162 */
Paul Walmsleya032d332012-08-03 09:21:10 -0600163 if (led_state & LED_STATE_ENABLED && fpga)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 __raw_writew(~hw_led_state, &fpga->leds);
165
166done:
167 local_irq_restore(flags);
168}