remarkable-linux/include/media/i2c/adp1653.h

/*
 * include/media/i2c/adp1653.h
 *
 * Copyright (C) 2008--2011 Nokia Corporation
 *
 * Contact: Sakari Ailus <sakari.ailus@iki.fi>
 *
 * Contributors:
 *	Sakari Ailus <sakari.ailus@iki.fi>
 *	Tuukka Toivonen <tuukkat76@gmail.com>
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 */

#ifndef ADP1653_H
#define ADP1653_H

#include <linux/i2c.h>
#include <linux/mutex.h>
#include <linux/videodev2.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-subdev.h>

#define ADP1653_NAME				"adp1653"
#define ADP1653_I2C_ADDR			(0x60 >> 1)

/* Register definitions */
#define ADP1653_REG_OUT_SEL			0x00
#define ADP1653_REG_OUT_SEL_HPLED_TORCH_MIN	0x01
#define ADP1653_REG_OUT_SEL_HPLED_TORCH_MAX	0x0b
#define ADP1653_REG_OUT_SEL_HPLED_FLASH_MIN	0x0c
#define ADP1653_REG_OUT_SEL_HPLED_FLASH_MAX	0x1f
#define ADP1653_REG_OUT_SEL_HPLED_SHIFT		3
#define ADP1653_REG_OUT_SEL_ILED_MAX		0x07
#define ADP1653_REG_OUT_SEL_ILED_SHIFT		0

#define ADP1653_REG_CONFIG			0x01
#define ADP1653_REG_CONFIG_TMR_CFG		(1 << 4)
#define ADP1653_REG_CONFIG_TMR_SET_MAX		0x0f
#define ADP1653_REG_CONFIG_TMR_SET_SHIFT	0

#define ADP1653_REG_SW_STROBE			0x02
#define ADP1653_REG_SW_STROBE_SW_STROBE		(1 << 0)

#define ADP1653_REG_FAULT			0x03
#define ADP1653_REG_FAULT_FLT_SCP		(1 << 3)
#define ADP1653_REG_FAULT_FLT_OT		(1 << 2)
#define ADP1653_REG_FAULT_FLT_TMR		(1 << 1)
#define ADP1653_REG_FAULT_FLT_OV		(1 << 0)

#define ADP1653_INDICATOR_INTENSITY_MIN		0
#define ADP1653_INDICATOR_INTENSITY_STEP	2500
#define ADP1653_INDICATOR_INTENSITY_MAX		\
	(ADP1653_REG_OUT_SEL_ILED_MAX * ADP1653_INDICATOR_INTENSITY_STEP)
#define ADP1653_INDICATOR_INTENSITY_uA_TO_REG(a) \
	((a) / ADP1653_INDICATOR_INTENSITY_STEP)
#define ADP1653_INDICATOR_INTENSITY_REG_TO_uA(a) \
	((a) * ADP1653_INDICATOR_INTENSITY_STEP)

#define ADP1653_FLASH_INTENSITY_BASE		35
#define ADP1653_FLASH_INTENSITY_STEP		15
#define ADP1653_FLASH_INTENSITY_MIN					\
	(ADP1653_FLASH_INTENSITY_BASE					\
	 + ADP1653_REG_OUT_SEL_HPLED_FLASH_MIN * ADP1653_FLASH_INTENSITY_STEP)
#define ADP1653_FLASH_INTENSITY_MAX			\
	(ADP1653_FLASH_INTENSITY_MIN +			\
	 (ADP1653_REG_OUT_SEL_HPLED_FLASH_MAX -		\
	  ADP1653_REG_OUT_SEL_HPLED_FLASH_MIN + 1) *	\
	 ADP1653_FLASH_INTENSITY_STEP)

#define ADP1653_FLASH_INTENSITY_mA_TO_REG(a)				\
	((a) < ADP1653_FLASH_INTENSITY_BASE ? 0 :			\
	 (((a) - ADP1653_FLASH_INTENSITY_BASE) / ADP1653_FLASH_INTENSITY_STEP))
#define ADP1653_FLASH_INTENSITY_REG_TO_mA(a)		\
	((a) * ADP1653_FLASH_INTENSITY_STEP + ADP1653_FLASH_INTENSITY_BASE)

#define ADP1653_TORCH_INTENSITY_MIN					\
	(ADP1653_FLASH_INTENSITY_BASE					\
	 + ADP1653_REG_OUT_SEL_HPLED_TORCH_MIN * ADP1653_FLASH_INTENSITY_STEP)
#define ADP1653_TORCH_INTENSITY_MAX			\
	(ADP1653_TORCH_INTENSITY_MIN +			\
	 (ADP1653_REG_OUT_SEL_HPLED_TORCH_MAX -		\
	  ADP1653_REG_OUT_SEL_HPLED_TORCH_MIN + 1) *	\
	 ADP1653_FLASH_INTENSITY_STEP)

struct adp1653_platform_data {
	int (*power)(struct v4l2_subdev *sd, int on);

	u32 max_flash_timeout;		/* flash light timeout in us */
	u32 max_flash_intensity;	/* led intensity, flash mode, mA */
	u32 max_torch_intensity;	/* led intensity, torch mode, mA */
	u32 max_indicator_intensity;	/* indicator led intensity, uA */

	struct gpio_desc *enable_gpio;	/* for device-tree based boot */
};

#define to_adp1653_flash(sd)	container_of(sd, struct adp1653_flash, subdev)

struct adp1653_flash {
	struct v4l2_subdev subdev;
	struct adp1653_platform_data *platform_data;

	struct v4l2_ctrl_handler ctrls;
	struct v4l2_ctrl *led_mode;
	struct v4l2_ctrl *flash_timeout;
	struct v4l2_ctrl *flash_intensity;
	struct v4l2_ctrl *torch_intensity;
	struct v4l2_ctrl *indicator_intensity;

	struct mutex power_lock;
	int power_count;
	int fault;
};

#endif /* ADP1653_H */