/*
 * Copyright (C) ST-Ericsson SA 2010
 *
 * License Terms: GNU General Public License, version 2
 * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
 */

#ifndef __LINUX_MFD_STMPE_H
#define __LINUX_MFD_STMPE_H

#include <linux/mutex.h>

struct device;
struct regulator;

enum stmpe_block {
	STMPE_BLOCK_GPIO	= 1 << 0,
	STMPE_BLOCK_KEYPAD	= 1 << 1,
	STMPE_BLOCK_TOUCHSCREEN	= 1 << 2,
	STMPE_BLOCK_ADC		= 1 << 3,
	STMPE_BLOCK_PWM		= 1 << 4,
	STMPE_BLOCK_ROTATOR	= 1 << 5,
};

enum stmpe_partnum {
	STMPE610,
	STMPE801,
	STMPE811,
	STMPE1601,
	STMPE1801,
	STMPE2401,
	STMPE2403,
	STMPE_NBR_PARTS
};

/*
 * For registers whose locations differ on variants,  the correct address is
 * obtained by indexing stmpe->regs with one of the following.
 */
enum {
	STMPE_IDX_CHIP_ID,
	STMPE_IDX_ICR_LSB,
	STMPE_IDX_IER_LSB,
	STMPE_IDX_ISR_LSB,
	STMPE_IDX_ISR_MSB,
	STMPE_IDX_GPMR_LSB,
	STMPE_IDX_GPSR_LSB,
	STMPE_IDX_GPCR_LSB,
	STMPE_IDX_GPDR_LSB,
	STMPE_IDX_GPEDR_MSB,
	STMPE_IDX_GPRER_LSB,
	STMPE_IDX_GPFER_LSB,
	STMPE_IDX_GPPUR_LSB,
	STMPE_IDX_GPPDR_LSB,
	STMPE_IDX_GPAFR_U_MSB,
	STMPE_IDX_IEGPIOR_LSB,
	STMPE_IDX_ISGPIOR_LSB,
	STMPE_IDX_ISGPIOR_MSB,
	STMPE_IDX_MAX,
};


struct stmpe_variant_info;
struct stmpe_client_info;

/**
 * struct stmpe - STMPE MFD structure
 * @vcc: optional VCC regulator
 * @vio: optional VIO regulator
 * @lock: lock protecting I/O operations
 * @irq_lock: IRQ bus lock
 * @dev: device, mostly for dev_dbg()
 * @irq_domain: IRQ domain
 * @client: client - i2c or spi
 * @ci: client specific information
 * @partnum: part number
 * @variant: the detected STMPE model number
 * @regs: list of addresses of registers which are at different addresses on
 *	  different variants.  Indexed by one of STMPE_IDX_*.
 * @irq: irq number for stmpe
 * @num_gpios: number of gpios, differs for variants
 * @ier: cache of IER registers for bus_lock
 * @oldier: cache of IER registers for bus_lock
 * @pdata: platform data
 */
struct stmpe {
	struct regulator *vcc;
	struct regulator *vio;
	struct mutex lock;
	struct mutex irq_lock;
	struct device *dev;
	struct irq_domain *domain;
	void *client;
	struct stmpe_client_info *ci;
	enum stmpe_partnum partnum;
	struct stmpe_variant_info *variant;
	const u8 *regs;

	int irq;
	int num_gpios;
	u8 ier[2];
	u8 oldier[2];
	struct stmpe_platform_data *pdata;
};

extern int stmpe_reg_write(struct stmpe *stmpe, u8 reg, u8 data);
extern int stmpe_reg_read(struct stmpe *stmpe, u8 reg);
extern int stmpe_block_read(struct stmpe *stmpe, u8 reg, u8 length,
			    u8 *values);
extern int stmpe_block_write(struct stmpe *stmpe, u8 reg, u8 length,
			     const u8 *values);
extern int stmpe_set_bits(struct stmpe *stmpe, u8 reg, u8 mask, u8 val);
extern int stmpe_set_altfunc(struct stmpe *stmpe, u32 pins,
			     enum stmpe_block block);
extern int stmpe_enable(struct stmpe *stmpe, unsigned int blocks);
extern int stmpe_disable(struct stmpe *stmpe, unsigned int blocks);

#define STMPE_GPIO_NOREQ_811_TOUCH	(0xf0)

/**
 * struct stmpe_platform_data - STMPE platform data
 * @id: device id to distinguish between multiple STMPEs on the same board
 * @blocks: bitmask of blocks to enable (use STMPE_BLOCK_*)
 * @irq_trigger: IRQ trigger to use for the interrupt to the host
 * @autosleep: bool to enable/disable stmpe autosleep
 * @autosleep_timeout: inactivity timeout in milliseconds for autosleep
 * @irq_over_gpio: true if gpio is used to get irq
 * @irq_gpio: gpio number over which irq will be requested (significant only if
 *	      irq_over_gpio is true)
 */
struct stmpe_platform_data {
	int id;
	unsigned int blocks;
	unsigned int irq_trigger;
	bool autosleep;
	bool irq_over_gpio;
	int irq_gpio;
	int autosleep_timeout;
};

#endif