2 * linux/arch/arm/mach-omap1/leds-h2p2-debug.c
4 * Copyright 2003 by Texas Instruments Incorporated
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").
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.
12 #include <linux/gpio.h>
13 #include <linux/init.h>
14 #include <linux/kernel_stat.h>
15 #include <linux/sched.h>
17 #include <linux/platform_data/gpio-omap.h>
19 #include <mach/hardware.h>
21 #include <asm/mach-types.h>
23 #include <plat/fpga.h>
28 #define GPIO_LED_RED 3
29 #define GPIO_LED_GREEN OMAP_MPUIO(4)
32 #define LED_STATE_ENABLED 0x01
33 #define LED_STATE_CLAIMED 0x02
34 #define LED_TIMER_ON 0x04
36 #define GPIO_IDLE GPIO_LED_GREEN
37 #define GPIO_TIMER GPIO_LED_RED
40 void h2p2_dbg_leds_event(led_event_t evt)
44 static struct h2p2_dbg_fpga __iomem *fpga;
45 static u16 led_state, hw_led_state;
47 local_irq_save(flags);
49 if (!(led_state & LED_STATE_ENABLED) && evt != led_start)
55 fpga = ioremap(H2P2_DBG_FPGA_START,
58 led_state |= LED_STATE_ENABLED;
59 __raw_writew(~0, &fpga->leds);
65 /* all leds off during suspend or shutdown */
67 if (! machine_is_omap_perseus2()) {
68 gpio_set_value(GPIO_TIMER, 0);
69 gpio_set_value(GPIO_IDLE, 0);
72 __raw_writew(~0, &fpga->leds);
73 led_state &= ~LED_STATE_ENABLED;
74 if (evt == led_halted) {
82 led_state |= LED_STATE_CLAIMED;
87 led_state &= ~LED_STATE_CLAIMED;
90 #ifdef CONFIG_LEDS_TIMER
92 led_state ^= LED_TIMER_ON;
94 if (machine_is_omap_perseus2())
95 hw_led_state ^= H2P2_DBG_FPGA_P2_LED_TIMER;
97 gpio_set_value(GPIO_TIMER, led_state & LED_TIMER_ON);
104 #ifdef CONFIG_LEDS_CPU
106 if (machine_is_omap_perseus2())
107 hw_led_state |= H2P2_DBG_FPGA_P2_LED_IDLE;
109 gpio_set_value(GPIO_IDLE, 1);
116 if (machine_is_omap_perseus2())
117 hw_led_state &= ~H2P2_DBG_FPGA_P2_LED_IDLE;
119 gpio_set_value(GPIO_IDLE, 0);
127 hw_led_state |= H2P2_DBG_FPGA_LED_GREEN;
130 hw_led_state &= ~H2P2_DBG_FPGA_LED_GREEN;
134 hw_led_state |= H2P2_DBG_FPGA_LED_AMBER;
137 hw_led_state &= ~H2P2_DBG_FPGA_LED_AMBER;
141 hw_led_state |= H2P2_DBG_FPGA_LED_RED;
144 hw_led_state &= ~H2P2_DBG_FPGA_LED_RED;
148 hw_led_state |= H2P2_DBG_FPGA_LED_BLUE;
151 hw_led_state &= ~H2P2_DBG_FPGA_LED_BLUE;
160 * Actually burn the LEDs
162 if (led_state & LED_STATE_ENABLED)
163 __raw_writew(~hw_led_state, &fpga->leds);
166 local_irq_restore(flags);