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

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 * linux/arch/arm/mach-pxa/leds-lubbock.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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 * Major surgery on April 2004 by Nicolas Pitre for less global

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 * namespace collision.  Mostly adapted the Mainstone version.

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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/lubbock.h>

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#include "leds.h"

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/*

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 * 8 discrete leds available for general use:

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 *

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 * Note: bits [15-8] are used to enable/blank the 8 7 segment hex displays

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 * so be sure to not monkey with them here.

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 */

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#define D28			(1 << 0)

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#define D27			(1 << 1)

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#define D26			(1 << 2)

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#define D25			(1 << 3)

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#define D24			(1 << 4)

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#define D23			(1 << 5)

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#define D22			(1 << 6)

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#define D21			(1 << 7)

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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 lubbock_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 = 0;

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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 = 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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		hw_led_state = 0;

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		break;

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#ifdef CONFIG_LEDS_TIMER

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	case led_timer:

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		hw_led_state ^= D26;

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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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		hw_led_state &= ~D27;

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		break;

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	case led_idle_end:

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		hw_led_state |= D27;

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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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		hw_led_state |= D21;

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		break;

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	case led_green_off:

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		hw_led_state &= ~D21;

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		break;

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	case led_amber_on:

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		hw_led_state |= D22;

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		break;

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	case led_amber_off:

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		hw_led_state &= ~D22;

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		break;

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	case led_red_on:

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		hw_led_state |= D23;

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		break;

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	case led_red_off:

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		hw_led_state &= ~D23;

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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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		LUB_DISC_BLNK_LED = (LUB_DISC_BLNK_LED | 0xff) & ~hw_led_state;

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	else

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		LUB_DISC_BLNK_LED |= 0xff;

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	local_irq_restore(flags);

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}

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