Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 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 | } |