167 lines
3.1 KiB
C
167 lines
3.1 KiB
C
/*
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* linux/arch/arm/mach-omap1/leds-h2p2-debug.c
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*
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* Copyright 2003 by Texas Instruments Incorporated
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*
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* There are 16 LEDs on the debug board (all green); four may be used
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* for logical 'green', 'amber', 'red', and 'blue' (after "claiming").
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*
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* The "surfer" expansion board and H2 sample board also have two-color
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* green+red LEDs (in parallel), used here for timer and idle indicators.
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*/
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#include <linux/gpio.h>
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#include <linux/init.h>
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#include <linux/kernel_stat.h>
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#include <linux/sched.h>
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#include <linux/io.h>
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#include <mach/hardware.h>
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#include <asm/leds.h>
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#include <asm/mach-types.h>
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#include <plat/fpga.h>
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#include "leds.h"
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#define GPIO_LED_RED 3
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#define GPIO_LED_GREEN OMAP_MPUIO(4)
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#define LED_STATE_ENABLED 0x01
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#define LED_STATE_CLAIMED 0x02
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#define LED_TIMER_ON 0x04
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#define GPIO_IDLE GPIO_LED_GREEN
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#define GPIO_TIMER GPIO_LED_RED
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void h2p2_dbg_leds_event(led_event_t evt)
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{
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unsigned long flags;
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static struct h2p2_dbg_fpga __iomem *fpga;
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static u16 led_state, hw_led_state;
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local_irq_save(flags);
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if (!(led_state & LED_STATE_ENABLED) && evt != led_start)
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goto done;
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switch (evt) {
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case led_start:
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if (!fpga)
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fpga = ioremap(H2P2_DBG_FPGA_START,
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H2P2_DBG_FPGA_SIZE);
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if (fpga) {
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led_state |= LED_STATE_ENABLED;
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__raw_writew(~0, &fpga->leds);
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}
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break;
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case led_stop:
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case led_halted:
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/* all leds off during suspend or shutdown */
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if (! machine_is_omap_perseus2()) {
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gpio_set_value(GPIO_TIMER, 0);
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gpio_set_value(GPIO_IDLE, 0);
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}
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__raw_writew(~0, &fpga->leds);
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led_state &= ~LED_STATE_ENABLED;
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if (evt == led_halted) {
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iounmap(fpga);
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fpga = NULL;
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}
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goto done;
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case led_claim:
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led_state |= LED_STATE_CLAIMED;
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hw_led_state = 0;
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break;
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case led_release:
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led_state &= ~LED_STATE_CLAIMED;
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break;
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#ifdef CONFIG_LEDS_TIMER
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case led_timer:
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led_state ^= LED_TIMER_ON;
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if (machine_is_omap_perseus2())
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hw_led_state ^= H2P2_DBG_FPGA_P2_LED_TIMER;
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else {
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gpio_set_value(GPIO_TIMER, led_state & LED_TIMER_ON);
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goto done;
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}
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break;
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#endif
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#ifdef CONFIG_LEDS_CPU
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case led_idle_start:
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if (machine_is_omap_perseus2())
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hw_led_state |= H2P2_DBG_FPGA_P2_LED_IDLE;
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else {
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gpio_set_value(GPIO_IDLE, 1);
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goto done;
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}
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break;
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case led_idle_end:
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if (machine_is_omap_perseus2())
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hw_led_state &= ~H2P2_DBG_FPGA_P2_LED_IDLE;
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else {
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gpio_set_value(GPIO_IDLE, 0);
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goto done;
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}
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break;
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#endif
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case led_green_on:
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hw_led_state |= H2P2_DBG_FPGA_LED_GREEN;
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break;
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case led_green_off:
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hw_led_state &= ~H2P2_DBG_FPGA_LED_GREEN;
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break;
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case led_amber_on:
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hw_led_state |= H2P2_DBG_FPGA_LED_AMBER;
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break;
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case led_amber_off:
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hw_led_state &= ~H2P2_DBG_FPGA_LED_AMBER;
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break;
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case led_red_on:
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hw_led_state |= H2P2_DBG_FPGA_LED_RED;
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break;
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case led_red_off:
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hw_led_state &= ~H2P2_DBG_FPGA_LED_RED;
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break;
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case led_blue_on:
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hw_led_state |= H2P2_DBG_FPGA_LED_BLUE;
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break;
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case led_blue_off:
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hw_led_state &= ~H2P2_DBG_FPGA_LED_BLUE;
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break;
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default:
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break;
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}
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/*
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* Actually burn the LEDs
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*/
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if (led_state & LED_STATE_ENABLED)
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__raw_writew(~hw_led_state, &fpga->leds);
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done:
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local_irq_restore(flags);
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}
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