147 lines
4.3 KiB
C
147 lines
4.3 KiB
C
/*
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* include/media/lm3642.h
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*
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* Copyright (c) 2010-2014 Intel Corporation. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version
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* 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*
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*/
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#ifndef _LM3642_H_
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#define _LM3642_H_
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#include <linux/videodev2.h>
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#include <media/v4l2-subdev.h>
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#define LM3642_NAME "lm3642"
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#define LM3642_ID 3642
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#define v4l2_queryctrl_entry_integer(_id, _name,\
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_minimum, _maximum, _step, \
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_default_value, _flags) \
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{\
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.id = (_id), \
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.type = V4L2_CTRL_TYPE_INTEGER, \
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.name = _name, \
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.minimum = (_minimum), \
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.maximum = (_maximum), \
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.step = (_step), \
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.default_value = (_default_value),\
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.flags = (_flags),\
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}
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#define v4l2_queryctrl_entry_boolean(_id, _name,\
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_default_value, _flags) \
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{\
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.id = (_id), \
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.type = V4L2_CTRL_TYPE_BOOLEAN, \
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.name = _name, \
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.minimum = 0, \
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.maximum = 1, \
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.step = 1, \
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.default_value = (_default_value),\
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.flags = (_flags),\
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}
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#define s_ctrl_id_entry_integer(_id, _name, \
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_minimum, _maximum, _step, \
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_default_value, _flags, \
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_s_ctrl, _g_ctrl) \
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{\
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.qc = v4l2_queryctrl_entry_integer(_id, _name,\
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_minimum, _maximum, _step,\
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_default_value, _flags), \
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.s_ctrl = _s_ctrl, \
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.g_ctrl = _g_ctrl, \
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}
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#define s_ctrl_id_entry_boolean(_id, _name, \
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_default_value, _flags, \
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_s_ctrl, _g_ctrl) \
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{\
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.qc = v4l2_queryctrl_entry_boolean(_id, _name,\
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_default_value, _flags), \
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.s_ctrl = _s_ctrl, \
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.g_ctrl = _g_ctrl, \
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}
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/* Default Values */
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#define LM3642_DEFAULT_TIMEOUT 300U
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#define LM3642_DEFAULT_RAMP_TIME 0x10 /* 1.024ms */
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#define LM3642_DEFAULT_INDICATOR_CURRENT 0x01 /* 1.88A */
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#define LM3642_DEFAULT_FLASH_CURRENT 0x0f /* 1500mA */
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/* Value settings for Flash Time-out Duration*/
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#define LM3642_MIN_TIMEOUT 100U
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#define LM3642_MAX_TIMEOUT 800U
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#define LM3642_TIMEOUT_STEPSIZE 100U
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/* Flash modes */
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#define LM3642_MODE_SHUTDOWN 0
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#define LM3642_MODE_INDICATOR 1
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#define LM3642_MODE_TORCH 2
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#define LM3642_MODE_FLASH 3
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/* timer delay time */
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#define LM3642_TIMER_DELAY 5
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/* Percentage <-> value macros */
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#define LM3642_MIN_PERCENT 0U
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#define LM3642_MAX_PERCENT 100U
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#define LM3642_CLAMP_PERCENTAGE(val) \
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clamp(val, LM3642_MIN_PERCENT, LM3642_MAX_PERCENT)
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#define LM3642_VALUE_TO_PERCENT(v, step) (((((unsigned long)((v)+1))*(step))+50)/100)
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#define LM3642_PERCENT_TO_VALUE(p, step) (((((unsigned long)(p))*100)+((step)>>1))/(step)-1)
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/* Product specific limits
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* TODO: get these from platform data */
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#define LM3642_FLASH_MAX_LVL 0x0F /* 1500mA */
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#define LM3642_TORCH_MAX_LVL 0x07 /* 187mA */
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#define LM3642_INDICATOR_MAX_LVL 0x01 /* 1.88A */
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/* Flash brightness, input is percentage, output is [0..15] */
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#define LM3642_FLASH_STEP \
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((100ul*(LM3642_MAX_PERCENT)+((LM3642_FLASH_MAX_LVL+1)>>1))/((LM3642_FLASH_MAX_LVL+1)))
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#define LM3642_FLASH_DEFAULT_BRIGHTNESS \
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LM3642_VALUE_TO_PERCENT(15, LM3642_FLASH_STEP)
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/* Torch brightness, input is percentage, output is [0..7] */
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#define LM3642_TORCH_STEP \
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((100ul*(LM3642_MAX_PERCENT)+((LM3642_TORCH_MAX_LVL+1)>>1))/((LM3642_TORCH_MAX_LVL+1)))
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#define LM3642_TORCH_DEFAULT_BRIGHTNESS \
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LM3642_VALUE_TO_PERCENT(0, LM3642_TORCH_STEP)
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/* Indicator brightness, input is percentage, output is [0..1] */
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#define LM3642_INDICATOR_STEP \
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((100ul*(LM3642_MAX_PERCENT)+((LM3642_INDICATOR_MAX_LVL+1)>>1))/((LM3642_INDICATOR_MAX_LVL+1)))
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#define LM3642_INDICATOR_DEFAULT_BRIGHTNESS \
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LM3642_VALUE_TO_PERCENT(1, LM3642_INDICATOR_STEP)
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/*
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* lm3642_platform_data - Flash controller platform data
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*/
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struct lm3642_platform_data {
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int gpio_torch;
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int gpio_strobe;
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unsigned int torch_en;
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unsigned int flash_en;
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unsigned int tx_en;
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unsigned int ivfm_en;
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};
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#endif /* _LM3642_H_ */
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