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Commit 34cc662f authored by Aurelien Jarno's avatar Aurelien Jarno Committed by Ralf Baechle
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[MIPS] Add gpio support to the BCM47XX platform 



Add GPIO support to the BCM47XX platform.  It will be used by a GPIO
LED driver.

Signed-off-by: default avatarAurelien Jarno <aurelien@aurel32.net>
Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 25e5fb97

arch/mips/bcm47xx/Makefile

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@@ -3,4 +3,4 @@ 
# under Linux.

#



obj-y := irq.o prom.o serial.o setup.o time.o
 
obj-y := gpio.o irq.o prom.o serial.o setup.o time.o

arch/mips/bcm47xx/gpio.c

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/*

 * This file is subject to the terms and conditions of the GNU General Public

 * License.  See the file "COPYING" in the main directory of this archive

 * for more details.

 *

 * Copyright (C) 2007 Aurelien Jarno <aurelien@aurel32.net>

 */



#include <linux/ssb/ssb.h>

#include <linux/ssb/ssb_driver_chipcommon.h>

#include <linux/ssb/ssb_driver_extif.h>

#include <asm/mach-bcm47xx/bcm47xx.h>

#include <asm/mach-bcm47xx/gpio.h>



int bcm47xx_gpio_to_irq(unsigned gpio)

{

	if (ssb_bcm47xx.chipco.dev)

		return ssb_mips_irq(ssb_bcm47xx.chipco.dev) + 2;

	else if (ssb_bcm47xx.extif.dev)

		return ssb_mips_irq(ssb_bcm47xx.extif.dev) + 2;

	else

		return -EINVAL;

}

EXPORT_SYMBOL_GPL(bcm47xx_gpio_to_irq);



int bcm47xx_gpio_get_value(unsigned gpio)

{

	if (ssb_bcm47xx.chipco.dev)

		return ssb_chipco_gpio_in(&ssb_bcm47xx.chipco, 1 << gpio);

	else if (ssb_bcm47xx.extif.dev)

		return ssb_extif_gpio_in(&ssb_bcm47xx.extif, 1 << gpio);

	else

		return 0;

}

EXPORT_SYMBOL_GPL(bcm47xx_gpio_get_value);



void bcm47xx_gpio_set_value(unsigned gpio, int value)

{

	if (ssb_bcm47xx.chipco.dev)

		ssb_chipco_gpio_out(&ssb_bcm47xx.chipco,

				    1 << gpio,

				    value ? 1 << gpio : 0);

	else if (ssb_bcm47xx.extif.dev)

		ssb_extif_gpio_out(&ssb_bcm47xx.extif,

				   1 << gpio,

				   value ? 1 << gpio : 0);

}

EXPORT_SYMBOL_GPL(bcm47xx_gpio_set_value);



int bcm47xx_gpio_direction_input(unsigned gpio)

{

	if (ssb_bcm47xx.chipco.dev && (gpio < BCM47XX_CHIPCO_GPIO_LINES))

		ssb_chipco_gpio_outen(&ssb_bcm47xx.chipco,

				      1 << gpio, 0);

	else if (ssb_bcm47xx.extif.dev && (gpio < BCM47XX_EXTIF_GPIO_LINES))

		ssb_extif_gpio_outen(&ssb_bcm47xx.extif,

				     1 << gpio, 0);

	else

		return -EINVAL;

	return 0;

}

EXPORT_SYMBOL_GPL(bcm47xx_gpio_direction_input);



int bcm47xx_gpio_direction_output(unsigned gpio, int value)

{

	bcm47xx_gpio_set_value(gpio, value);



	if (ssb_bcm47xx.chipco.dev && (gpio < BCM47XX_CHIPCO_GPIO_LINES))

		ssb_chipco_gpio_outen(&ssb_bcm47xx.chipco,

				      1 << gpio, 1 << gpio);

	else if (ssb_bcm47xx.extif.dev && (gpio < BCM47XX_EXTIF_GPIO_LINES))

		ssb_extif_gpio_outen(&ssb_bcm47xx.extif,

				     1 << gpio, 1 << gpio);

	else

		return -EINVAL;

	return 0;

}

EXPORT_SYMBOL_GPL(bcm47xx_gpio_direction_output);

include/asm-mips/mach-bcm47xx/gpio.h

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/*

 * This file is subject to the terms and conditions of the GNU General Public

 * License.  See the file "COPYING" in the main directory of this archive

 * for more details.

 *

 * Copyright (C) 2007 Aurelien Jarno <aurelien@aurel32.net>

 */



#ifndef __BCM47XX_GPIO_H

#define __BCM47XX_GPIO_H



#define BCM47XX_EXTIF_GPIO_LINES	5

#define BCM47XX_CHIPCO_GPIO_LINES	16



extern int bcm47xx_gpio_to_irq(unsigned gpio);

extern int bcm47xx_gpio_get_value(unsigned gpio);

extern void bcm47xx_gpio_set_value(unsigned gpio, int value);

extern int bcm47xx_gpio_direction_input(unsigned gpio);

extern int bcm47xx_gpio_direction_output(unsigned gpio, int value);



static inline int gpio_request(unsigned gpio, const char *label)

{

       return 0;

}



static inline void gpio_free(unsigned gpio)

{

}



static inline int gpio_to_irq(unsigned gpio)

{

	return bcm47xx_gpio_to_irq(gpio);

}



static inline int gpio_get_value(unsigned gpio)

{

	return bcm47xx_gpio_get_value(gpio);

}



static inline void gpio_set_value(unsigned gpio, int value)

{

	bcm47xx_gpio_set_value(gpio, value);

}



static inline int gpio_direction_input(unsigned gpio)

{

	return bcm47xx_gpio_direction_input(gpio);

}



static inline int gpio_direction_output(unsigned gpio, int value)

{

	return bcm47xx_gpio_direction_output(gpio, value);

}





/* cansleep wrappers */

#include <asm-generic/gpio.h>



#endif /* __BCM47XX_GPIO_H */