root/include/media/adp1653.h

/*
 * include/media/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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 *
 */

#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 */
        u32 max_torch_intensity;        /* led intensity, torch mode */
        u32 max_indicator_intensity;    /* indicator led intensity */
};

#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 */