/*
 * Copyright (c) 2012, Google Inc. All rights reserved.
 * SPDX-License-Identifier:	GPL-2.0
 */

#ifndef _X86_GPIO_H_
#define _X86_GPIO_H_

#include <linux/compiler.h>
#include <asm-generic/gpio.h>

struct ich6_bank_platdata {
	uint16_t base_addr;
	const char *bank_name;
	int offset;
};

#define GPIO_MODE_NATIVE	0
#define GPIO_MODE_GPIO		1
#define GPIO_MODE_NONE		1

#define GPIO_DIR_OUTPUT		0
#define GPIO_DIR_INPUT		1

#define GPIO_NO_INVERT		0
#define GPIO_INVERT		1

#define GPIO_LEVEL_LOW		0
#define GPIO_LEVEL_HIGH		1

#define GPIO_NO_BLINK		0
#define GPIO_BLINK		1

#define GPIO_RESET_PWROK	0
#define GPIO_RESET_RSMRST	1

struct pch_gpio_set1 {
	u32 gpio0:1;
	u32 gpio1:1;
	u32 gpio2:1;
	u32 gpio3:1;
	u32 gpio4:1;
	u32 gpio5:1;
	u32 gpio6:1;
	u32 gpio7:1;
	u32 gpio8:1;
	u32 gpio9:1;
	u32 gpio10:1;
	u32 gpio11:1;
	u32 gpio12:1;
	u32 gpio13:1;
	u32 gpio14:1;
	u32 gpio15:1;
	u32 gpio16:1;
	u32 gpio17:1;
	u32 gpio18:1;
	u32 gpio19:1;
	u32 gpio20:1;
	u32 gpio21:1;
	u32 gpio22:1;
	u32 gpio23:1;
	u32 gpio24:1;
	u32 gpio25:1;
	u32 gpio26:1;
	u32 gpio27:1;
	u32 gpio28:1;
	u32 gpio29:1;
	u32 gpio30:1;
	u32 gpio31:1;
} __packed;

struct pch_gpio_set2 {
	u32 gpio32:1;
	u32 gpio33:1;
	u32 gpio34:1;
	u32 gpio35:1;
	u32 gpio36:1;
	u32 gpio37:1;
	u32 gpio38:1;
	u32 gpio39:1;
	u32 gpio40:1;
	u32 gpio41:1;
	u32 gpio42:1;
	u32 gpio43:1;
	u32 gpio44:1;
	u32 gpio45:1;
	u32 gpio46:1;
	u32 gpio47:1;
	u32 gpio48:1;
	u32 gpio49:1;
	u32 gpio50:1;
	u32 gpio51:1;
	u32 gpio52:1;
	u32 gpio53:1;
	u32 gpio54:1;
	u32 gpio55:1;
	u32 gpio56:1;
	u32 gpio57:1;
	u32 gpio58:1;
	u32 gpio59:1;
	u32 gpio60:1;
	u32 gpio61:1;
	u32 gpio62:1;
	u32 gpio63:1;
} __packed;

struct pch_gpio_set3 {
	u32 gpio64:1;
	u32 gpio65:1;
	u32 gpio66:1;
	u32 gpio67:1;
	u32 gpio68:1;
	u32 gpio69:1;
	u32 gpio70:1;
	u32 gpio71:1;
	u32 gpio72:1;
	u32 gpio73:1;
	u32 gpio74:1;
	u32 gpio75:1;
} __packed;

/*
 * This hilariously complex structure came from Coreboot. The
 * setup_pch_gpios() function uses it. It could be move to device tree, or
 * adjust to use masks instead of bitfields.
 */
struct pch_gpio_map {
	struct {
		const struct pch_gpio_set1 *mode;
		const struct pch_gpio_set1 *direction;
		const struct pch_gpio_set1 *level;
		const struct pch_gpio_set1 *reset;
		const struct pch_gpio_set1 *invert;
		const struct pch_gpio_set1 *blink;
	} set1;
	struct {
		const struct pch_gpio_set2 *mode;
		const struct pch_gpio_set2 *direction;
		const struct pch_gpio_set2 *level;
		const struct pch_gpio_set2 *reset;
	} set2;
	struct {
		const struct pch_gpio_set3 *mode;
		const struct pch_gpio_set3 *direction;
		const struct pch_gpio_set3 *level;
		const struct pch_gpio_set3 *reset;
	} set3;
};

/*
 * Deprecated functions to set up the GPIO map. The device tree should be used
 * instead.
 */
int gpio_ich6_pinctrl_init(void);
void setup_pch_gpios(u16 gpiobase, const struct pch_gpio_map *gpio);
void ich_gpio_set_gpio_map(const struct pch_gpio_map *map);

#endif /* _X86_GPIO_H_ */