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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/arm/mach-pxa/leds-idp.c
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/*

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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 <[email protected]>

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 *

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 * Copyright (c) 2001 Jeff Sutherland <[email protected]>

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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/init.h>

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#include <mach/hardware.h>

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#include <asm/leds.h>

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#include <asm/system.h>

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#include <mach/pxa25x.h>

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#include <mach/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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