Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/arch/arm/mach-omap/leds-h2p2-debug.c | |
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> | |
16 | #include <linux/version.h> | |
17 | ||
18 | #include <asm/io.h> | |
19 | #include <asm/hardware.h> | |
20 | #include <asm/leds.h> | |
21 | #include <asm/system.h> | |
22 | ||
23 | #include <asm/arch/fpga.h> | |
24 | #include <asm/arch/gpio.h> | |
25 | ||
26 | #include "leds.h" | |
27 | ||
28 | ||
29 | #define GPIO_LED_RED 3 | |
30 | #define GPIO_LED_GREEN OMAP_MPUIO(4) | |
31 | ||
32 | ||
33 | #define LED_STATE_ENABLED 0x01 | |
34 | #define LED_STATE_CLAIMED 0x02 | |
35 | #define LED_TIMER_ON 0x04 | |
36 | ||
37 | #define GPIO_IDLE GPIO_LED_GREEN | |
38 | #define GPIO_TIMER GPIO_LED_RED | |
39 | ||
40 | ||
41 | void h2p2_dbg_leds_event(led_event_t evt) | |
42 | { | |
43 | unsigned long flags; | |
44 | ||
45 | static struct h2p2_dbg_fpga __iomem *fpga; | |
46 | static u16 led_state, hw_led_state; | |
47 | ||
48 | local_irq_save(flags); | |
49 | ||
50 | if (!(led_state & LED_STATE_ENABLED) && evt != led_start) | |
51 | goto done; | |
52 | ||
53 | switch (evt) { | |
54 | case led_start: | |
55 | if (!fpga) | |
56 | fpga = ioremap(H2P2_DBG_FPGA_START, | |
57 | H2P2_DBG_FPGA_SIZE); | |
58 | if (fpga) { | |
59 | led_state |= LED_STATE_ENABLED; | |
60 | __raw_writew(~0, &fpga->leds); | |
61 | } | |
62 | break; | |
63 | ||
64 | case led_stop: | |
65 | case led_halted: | |
66 | /* all leds off during suspend or shutdown */ | |
67 | omap_set_gpio_dataout(GPIO_TIMER, 0); | |
68 | omap_set_gpio_dataout(GPIO_IDLE, 0); | |
69 | __raw_writew(~0, &fpga->leds); | |
70 | led_state &= ~LED_STATE_ENABLED; | |
71 | if (evt == led_halted) { | |
72 | iounmap(fpga); | |
73 | fpga = NULL; | |
74 | } | |
75 | goto done; | |
76 | ||
77 | case led_claim: | |
78 | led_state |= LED_STATE_CLAIMED; | |
79 | hw_led_state = 0; | |
80 | break; | |
81 | ||
82 | case led_release: | |
83 | led_state &= ~LED_STATE_CLAIMED; | |
84 | break; | |
85 | ||
86 | #ifdef CONFIG_LEDS_TIMER | |
87 | case led_timer: | |
88 | led_state ^= LED_TIMER_ON; | |
89 | omap_set_gpio_dataout(GPIO_TIMER, led_state & LED_TIMER_ON); | |
90 | goto done; | |
91 | #endif | |
92 | ||
93 | #ifdef CONFIG_LEDS_CPU | |
94 | case led_idle_start: | |
95 | omap_set_gpio_dataout(GPIO_IDLE, 1); | |
96 | goto done; | |
97 | ||
98 | case led_idle_end: | |
99 | omap_set_gpio_dataout(GPIO_IDLE, 0); | |
100 | goto done; | |
101 | #endif | |
102 | ||
103 | case led_green_on: | |
104 | hw_led_state |= H2P2_DBG_FPGA_LED_GREEN; | |
105 | break; | |
106 | case led_green_off: | |
107 | hw_led_state &= ~H2P2_DBG_FPGA_LED_GREEN; | |
108 | break; | |
109 | ||
110 | case led_amber_on: | |
111 | hw_led_state |= H2P2_DBG_FPGA_LED_AMBER; | |
112 | break; | |
113 | case led_amber_off: | |
114 | hw_led_state &= ~H2P2_DBG_FPGA_LED_AMBER; | |
115 | break; | |
116 | ||
117 | case led_red_on: | |
118 | hw_led_state |= H2P2_DBG_FPGA_LED_RED; | |
119 | break; | |
120 | case led_red_off: | |
121 | hw_led_state &= ~H2P2_DBG_FPGA_LED_RED; | |
122 | break; | |
123 | ||
124 | case led_blue_on: | |
125 | hw_led_state |= H2P2_DBG_FPGA_LED_BLUE; | |
126 | break; | |
127 | case led_blue_off: | |
128 | hw_led_state &= ~H2P2_DBG_FPGA_LED_BLUE; | |
129 | break; | |
130 | ||
131 | default: | |
132 | break; | |
133 | } | |
134 | ||
135 | ||
136 | /* | |
137 | * Actually burn the LEDs | |
138 | */ | |
139 | if (led_state & LED_STATE_CLAIMED) | |
140 | __raw_writew(~hw_led_state, &fpga->leds); | |
141 | ||
142 | done: | |
143 | local_irq_restore(flags); | |
144 | } |