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/*
* include/media/lm3642.h
*
* Copyright (c) 2010-2012 Intel Corporation. All Rights Reserved.
*
* 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.
*/
#ifndef _LM3642_H_
#define _LM3642_H_
#include <linux/videodev2.h>
#include <media/v4l2-subdev.h>
#define LM3642_NAME "lm3642"
#define LM3642_ID 3642
#define v4l2_queryctrl_entry_integer(_id, _name,\
_minimum, _maximum, _step, \
_default_value, _flags) \
{\
.id = (_id), \
.type = V4L2_CTRL_TYPE_INTEGER, \
.name = _name, \
.minimum = (_minimum), \
.maximum = (_maximum), \
.step = (_step), \
.default_value = (_default_value),\
.flags = (_flags),\
}
#define v4l2_queryctrl_entry_boolean(_id, _name,\
_default_value, _flags) \
{\
.id = (_id), \
.type = V4L2_CTRL_TYPE_BOOLEAN, \
.name = _name, \
.minimum = 0, \
.maximum = 1, \
.step = 1, \
.default_value = (_default_value),\
.flags = (_flags),\
}
#define s_ctrl_id_entry_integer(_id, _name, \
_minimum, _maximum, _step, \
_default_value, _flags, \
_s_ctrl, _g_ctrl) \
{\
.qc = v4l2_queryctrl_entry_integer(_id, _name,\
_minimum, _maximum, _step,\
_default_value, _flags), \
.s_ctrl = _s_ctrl, \
.g_ctrl = _g_ctrl, \
}
#define s_ctrl_id_entry_boolean(_id, _name, \
_default_value, _flags, \
_s_ctrl, _g_ctrl) \
{\
.qc = v4l2_queryctrl_entry_boolean(_id, _name,\
_default_value, _flags), \
.s_ctrl = _s_ctrl, \
.g_ctrl = _g_ctrl, \
}
/* Default Values */
#define LM3642_DEFAULT_TIMEOUT 300U
#define LM3642_DEFAULT_RAMP_TIME 0x10 /* 1.024ms */
#define LM3642_DEFAULT_INDICATOR_CURRENT 0x01 /* 1.88A */
#define LM3642_DEFAULT_FLASH_CURRENT 0x0f /* 1500mA */
/* Value settings for Flash Time-out Duration*/
#define LM3642_MIN_TIMEOUT 100U
#define LM3642_MAX_TIMEOUT 800U
#define LM3642_TIMEOUT_STEPSIZE 100U
/* Flash modes */
#define LM3642_MODE_SHUTDOWN 0
#define LM3642_MODE_INDICATOR 1
#define LM3642_MODE_TORCH 2
#define LM3642_MODE_FLASH 3
/* timer delay time */
#define LM3642_TIMER_DELAY 5
/* Percentage <-> value macros */
#define LM3642_MIN_PERCENT 0U
#define LM3642_MAX_PERCENT 100U
#define LM3642_CLAMP_PERCENTAGE(val) \
clamp(val, LM3642_MIN_PERCENT, LM3642_MAX_PERCENT)
#define LM3642_VALUE_TO_PERCENT(v, step) \
(((((unsigned long)((v)+1))*(step))+50)/100)
#define LM3642_PERCENT_TO_VALUE(p, step) \
(((((unsigned long)(p))*100)+((step)>>1))/(step)-1)
/* Product specific limits
* TODO: get these from platform data */
#define LM3642_FLASH_MAX_LVL 0x0F /* 1500mA */
#define LM3642_TORCH_MAX_LVL 0x07 /* 187mA */
#define LM3642_INDICATOR_MAX_LVL 0x01 /* 1.88A */
/* Flash brightness, input is percentage, output is [0..15] */
#define LM3642_FLASH_STEP \
((100ul*(LM3642_MAX_PERCENT) \
+((LM3642_FLASH_MAX_LVL+1)>>1)) \
/((LM3642_FLASH_MAX_LVL+1)))
#define LM3642_FLASH_DEFAULT_BRIGHTNESS \
LM3642_VALUE_TO_PERCENT(15, LM3642_FLASH_STEP)
/* Torch brightness, input is percentage, output is [0..7] */
#define LM3642_TORCH_STEP \
((100ul*(LM3642_MAX_PERCENT) \
+((LM3642_TORCH_MAX_LVL+1)>>1)) \
/((LM3642_TORCH_MAX_LVL+1)))
#define LM3642_TORCH_DEFAULT_BRIGHTNESS \
LM3642_VALUE_TO_PERCENT(0, LM3642_TORCH_STEP)
/* Indicator brightness, input is percentage, output is [0..1] */
#define LM3642_INDICATOR_STEP \
((100ul*(LM3642_MAX_PERCENT) \
+((LM3642_INDICATOR_MAX_LVL+1)>>1)) \
/((LM3642_INDICATOR_MAX_LVL+1)))
#define LM3642_INDICATOR_DEFAULT_BRIGHTNESS \
LM3642_VALUE_TO_PERCENT(1, LM3642_INDICATOR_STEP)
/*
* lm3642_platform_data - Flash controller platform data
*/
struct lm3642_platform_data {
int gpio_torch;
int gpio_strobe;
int (*power_ctrl)(struct v4l2_subdev *subdev, int on);
unsigned int torch_en;
unsigned int flash_en;
unsigned int tx_en;
unsigned int ivfm_en;
};
#endif /* _LM3642_H_ */
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