Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
7c38cf02 | 2 | * linux/arch/arm/mach-omap1/leds-h2p2-debug.c |
1da177e4 LT |
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 | */ | |
1da177e4 LT |
12 | #include <linux/init.h> |
13 | #include <linux/kernel_stat.h> | |
14 | #include <linux/sched.h> | |
1da177e4 LT |
15 | |
16 | #include <asm/io.h> | |
17 | #include <asm/hardware.h> | |
18 | #include <asm/leds.h> | |
19 | #include <asm/system.h> | |
3179a019 | 20 | #include <asm/mach-types.h> |
1da177e4 LT |
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 | ||
40 | void 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 */ | |
3179a019 TL |
66 | |
67 | if (! machine_is_omap_perseus2()) { | |
68 | omap_set_gpio_dataout(GPIO_TIMER, 0); | |
69 | omap_set_gpio_dataout(GPIO_IDLE, 0); | |
70 | } | |
71 | ||
1da177e4 LT |
72 | __raw_writew(~0, &fpga->leds); |
73 | led_state &= ~LED_STATE_ENABLED; | |
74 | if (evt == led_halted) { | |
75 | iounmap(fpga); | |
76 | fpga = NULL; | |
77 | } | |
3179a019 | 78 | |
1da177e4 LT |
79 | 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; | |
3179a019 TL |
93 | |
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; | |
1da177e4 LT |
102 | #endif |
103 | ||
104 | #ifdef CONFIG_LEDS_CPU | |
105 | case led_idle_start: | |
3179a019 TL |
106 | 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; | |
1da177e4 LT |
114 | |
115 | case led_idle_end: | |
3179a019 TL |
116 | 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; | |
1da177e4 LT |
124 | #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 | */ | |
3179a019 | 162 | if (led_state & LED_STATE_ENABLED) |
1da177e4 LT |
163 | __raw_writew(~hw_led_state, &fpga->leds); |
164 | ||
165 | done: | |
166 | local_irq_restore(flags); | |
167 | } |