/* linux/arch/mips/include/asm/mach-loongson/gsc3280/gpio-core.h
 *
 * Copyright 2012 Loongson. co LTD
 *				  Ansonn.wang <ansonn.wang@gmail.com>
 *
 * GSC3280 - GPIO core
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
*/
#ifndef _GSC3280_GPIO_PLAT_H
#define _GSC3280_GPIO_PLAT_H

#include <linux/gpio.h>


struct GSC3280_gpio_chip;

#ifdef CONFIG_PM
/**
 * struct GSC3280_gpio_pm - power management (suspend/resume) information
 * @save: Routine to save the state of the GPIO block
 * @resume: Routine to resume the GPIO block.
 */
struct GSC3280_gpio_pm {
	void (*save)(struct gsc3280_gpio_chip *chip);
	void (*resume)(struct gsc32800_gpio_chip *chip);
};

#endif
/**
 * struct gsc3280_gpio_pm - wrapper for specific implementation of gpio
 * @chip: The chip structure to be exported via gpiolib.
 * @base: The base pointer to the gpio configuration registers.
 * @irq_base: The base irq number.
 * @lock: Lock for exclusive access to this gpio bank.
 * @pm_save: Save information for suspend/resume support.
 *
 */

struct gsc3280_gpio_chip {
	struct gpio_chip	chip;
#ifdef CONFIG_PM
	struct gsc3280_gpio_pm	*pm;
#endif
	void __iomem		*base;
	int					irq_base;
	spinlock_t		 	lock;
#ifdef CONFIG_PM
	u32					pm_save[4];
#endif
};

static inline 
struct gsc3280_gpio_chip *to_gsc3280_gpio(struct gpio_chip *gpc)
{
	return container_of(gpc, struct gsc3280_gpio_chip, chip);
}


/* locking wrappers to deal with multiple access to the same gpio bank */
#define gsc3280_gpio_lock(_oc, _fl) \
					spin_lock_irqsave(&(_oc)->lock, _fl)
#define gsc3280_gpio_unlock(_oc, _fl) \
					spin_unlock_irqrestore(&(_oc)->lock, _fl)

#if 0
#define GSC3280_BANK_BASE(bank_nr) \
		((volatile __iomem void *)(GSC3280_GPIO_BASEADDR + ((bank_nr) * 0x0c)))
#endif

#ifdef CONFIG_PM
void gsc3280_gpio_pm_save(struct gsc3280_gpio_chip *chip);
void gsc3280_gpio_pm_resume(struct gsc3280_gpio_chip *chip);
#endif

#endif