aboutsummaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-omap1/leds-h2p2-debug.c
blob: 8976fbb21f7cb1059b45a88ed986b7e7a6ac9824 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
/*
 * linux/arch/arm/mach-omap1/leds-h2p2-debug.c
 *
 * Copyright 2003 by Texas Instruments Incorporated
 *
 * There are 16 LEDs on the debug board (all green); four may be used
 * for logical 'green', 'amber', 'red', and 'blue' (after "claiming").
 *
 * The "surfer" expansion board and H2 sample board also have two-color
 * green+red LEDs (in parallel), used here for timer and idle indicators.
 */
#include <linux/init.h>
#include <linux/kernel_stat.h>
#include <linux/sched.h>

#include <asm/io.h>
#include <asm/hardware.h>
#include <asm/leds.h>
#include <asm/system.h>
#include <asm/mach-types.h>

#include <asm/arch/fpga.h>
#include <asm/arch/gpio.h>

#include "leds.h"


#define GPIO_LED_RED		3
#define GPIO_LED_GREEN		OMAP_MPUIO(4)


#define LED_STATE_ENABLED	0x01
#define LED_STATE_CLAIMED	0x02
#define LED_TIMER_ON		0x04

#define GPIO_IDLE		GPIO_LED_GREEN
#define GPIO_TIMER		GPIO_LED_RED


void h2p2_dbg_leds_event(led_event_t evt)
{
	unsigned long flags;

	static struct h2p2_dbg_fpga __iomem *fpga;
	static u16 led_state, hw_led_state;

	local_irq_save(flags);

	if (!(led_state & LED_STATE_ENABLED) && evt != led_start)
		goto done;

	switch (evt) {
	case led_start:
		if (!fpga)
			fpga = ioremap(H2P2_DBG_FPGA_START,
						H2P2_DBG_FPGA_SIZE);
		if (fpga) {
			led_state |= LED_STATE_ENABLED;
			__raw_writew(~0, &fpga->leds);
		}
		break;

	case led_stop:
	case led_halted:
		/* all leds off during suspend or shutdown */

		if (! machine_is_omap_perseus2()) {
			omap_set_gpio_dataout(GPIO_TIMER, 0);
			omap_set_gpio_dataout(GPIO_IDLE, 0);
		}

		__raw_writew(~0, &fpga->leds);
		led_state &= ~LED_STATE_ENABLED;
		if (evt == led_halted) {
			iounmap(fpga);
			fpga = NULL;
		}

		goto done;

	case led_claim:
		led_state |= LED_STATE_CLAIMED;
		hw_led_state = 0;
		break;

	case led_release:
		led_state &= ~LED_STATE_CLAIMED;
		break;

#ifdef CONFIG_LEDS_TIMER
	case led_timer:
		led_state ^= LED_TIMER_ON;

		if (machine_is_omap_perseus2())
			hw_led_state ^= H2P2_DBG_FPGA_P2_LED_TIMER;
		else {
			omap_set_gpio_dataout(GPIO_TIMER, led_state & LED_TIMER_ON);
			goto done;
		}

		break;
#endif

#ifdef CONFIG_LEDS_CPU
	case led_idle_start:
		if (machine_is_omap_perseus2())
			hw_led_state |= H2P2_DBG_FPGA_P2_LED_IDLE;
		else {
			omap_set_gpio_dataout(GPIO_IDLE, 1);
			goto done;
		}

		break;

	case led_idle_end:
		if (machine_is_omap_perseus2())
			hw_led_state &= ~H2P2_DBG_FPGA_P2_LED_IDLE;
		else {
			omap_set_gpio_dataout(GPIO_IDLE, 0);
			goto done;
		}

		break;
#endif

	case led_green_on:
		hw_led_state |= H2P2_DBG_FPGA_LED_GREEN;
		break;
	case led_green_off:
		hw_led_state &= ~H2P2_DBG_FPGA_LED_GREEN;
		break;

	case led_amber_on:
		hw_led_state |= H2P2_DBG_FPGA_LED_AMBER;
		break;
	case led_amber_off:
		hw_led_state &= ~H2P2_DBG_FPGA_LED_AMBER;
		break;

	case led_red_on:
		hw_led_state |= H2P2_DBG_FPGA_LED_RED;
		break;
	case led_red_off:
		hw_led_state &= ~H2P2_DBG_FPGA_LED_RED;
		break;

	case led_blue_on:
		hw_led_state |= H2P2_DBG_FPGA_LED_BLUE;
		break;
	case led_blue_off:
		hw_led_state &= ~H2P2_DBG_FPGA_LED_BLUE;
		break;

	default:
		break;
	}


	/*
	 *  Actually burn the LEDs
	 */
	if (led_state & LED_STATE_ENABLED)
		__raw_writew(~hw_led_state, &fpga->leds);

done:
	local_irq_restore(flags);
}