118 строки
2.2 KiB
C
118 строки
2.2 KiB
C
/*
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* linux/arch/arm/mach-pxa/leds-idp.c
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*
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* Copyright (C) 2000 John Dorsey <john+@cs.cmu.edu>
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*
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* Copyright (c) 2001 Jeff Sutherland <jeffs@accelent.com>
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*
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* Original (leds-footbridge.c) by Russell King
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*
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* Macros for actual LED manipulation should be in machine specific
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* files in this 'mach' directory.
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*/
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#include <linux/config.h>
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#include <linux/init.h>
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#include <asm/hardware.h>
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#include <asm/leds.h>
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#include <asm/system.h>
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#include <asm/arch/pxa-regs.h>
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#include <asm/arch/idp.h>
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#include "leds.h"
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#define LED_STATE_ENABLED 1
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#define LED_STATE_CLAIMED 2
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static unsigned int led_state;
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static unsigned int hw_led_state;
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void idp_leds_event(led_event_t evt)
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{
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unsigned long flags;
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local_irq_save(flags);
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switch (evt) {
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case led_start:
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hw_led_state = IDP_HB_LED | IDP_BUSY_LED;
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led_state = LED_STATE_ENABLED;
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break;
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case led_stop:
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led_state &= ~LED_STATE_ENABLED;
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break;
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case led_claim:
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led_state |= LED_STATE_CLAIMED;
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hw_led_state = IDP_HB_LED | IDP_BUSY_LED;
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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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hw_led_state = IDP_HB_LED | IDP_BUSY_LED;
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break;
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#ifdef CONFIG_LEDS_TIMER
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case led_timer:
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if (!(led_state & LED_STATE_CLAIMED))
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hw_led_state ^= IDP_HB_LED;
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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 (!(led_state & LED_STATE_CLAIMED))
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hw_led_state &= ~IDP_BUSY_LED;
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break;
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case led_idle_end:
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if (!(led_state & LED_STATE_CLAIMED))
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hw_led_state |= IDP_BUSY_LED;
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break;
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#endif
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case led_halted:
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break;
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case led_green_on:
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if (led_state & LED_STATE_CLAIMED)
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hw_led_state |= IDP_HB_LED;
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break;
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case led_green_off:
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if (led_state & LED_STATE_CLAIMED)
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hw_led_state &= ~IDP_HB_LED;
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break;
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case led_amber_on:
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break;
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case led_amber_off:
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break;
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case led_red_on:
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if (led_state & LED_STATE_CLAIMED)
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hw_led_state |= IDP_BUSY_LED;
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break;
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case led_red_off:
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if (led_state & LED_STATE_CLAIMED)
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hw_led_state &= ~IDP_BUSY_LED;
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break;
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default:
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break;
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}
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if (led_state & LED_STATE_ENABLED)
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IDP_CPLD_LED_CONTROL = ( (IDP_CPLD_LED_CONTROL | IDP_LEDS_MASK) & ~hw_led_state);
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else
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IDP_CPLD_LED_CONTROL |= IDP_LEDS_MASK;
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local_irq_restore(flags);
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}
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