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linux-stable/drivers/media/i2c/as3645a.c
Sakari Ailus bcb63314e2 [media] media: Drop FSF's postal address from the source code files 
Drop the FSF's postal address from the source code files that typically
contain mostly the license text. Of the 628 removed instances, 578 are
outdated.

The patch has been created with the following command without manual edits:

git grep -l "675 Mass Ave\|59 Temple Place\|51 Franklin St" -- \
	drivers/media/ include/media|while read i; do i=$i perl -e '
open(F,"< $ENV{i}");
$a=join("", <F>);
$a =~ s/[ \t]*\*\n.*You should.*\n.*along with.*\n.*(\n.*USA.*$)?\n//m
	&& $a =~ s/(^.*)Or, (point your browser to) /$1To obtain the license, $2\n$1/m;
close(F);
open(F, "> $ENV{i}");
print F $a;
close(F);'; done

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
2017-01-27 11:38:09 -02:00

880 lines
23 KiB
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/*
* drivers/media/i2c/as3645a.c - AS3645A and LM3555 flash controllers driver
*
* Copyright (C) 2008-2011 Nokia Corporation
* Copyright (c) 2011, Intel Corporation.
*
* Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.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.
*
* TODO:
* - Check hardware FSTROBE control when sensor driver add support for this
*
*/
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <media/i2c/as3645a.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#define AS_TIMER_MS_TO_CODE(t) (((t) - 100) / 50)
#define AS_TIMER_CODE_TO_MS(c) (50 * (c) + 100)
/* Register definitions */
/* Read-only Design info register: Reset state: xxxx 0001 */
#define AS_DESIGN_INFO_REG 0x00
#define AS_DESIGN_INFO_FACTORY(x) (((x) >> 4))
#define AS_DESIGN_INFO_MODEL(x) ((x) & 0x0f)
/* Read-only Version control register: Reset state: 0000 0000
* for first engineering samples
*/
#define AS_VERSION_CONTROL_REG 0x01
#define AS_VERSION_CONTROL_RFU(x) (((x) >> 4))
#define AS_VERSION_CONTROL_VERSION(x) ((x) & 0x0f)
/* Read / Write (Indicator and timer register): Reset state: 0000 1111 */
#define AS_INDICATOR_AND_TIMER_REG 0x02
#define AS_INDICATOR_AND_TIMER_TIMEOUT_SHIFT 0
#define AS_INDICATOR_AND_TIMER_VREF_SHIFT 4
#define AS_INDICATOR_AND_TIMER_INDICATOR_SHIFT 6
/* Read / Write (Current set register): Reset state: 0110 1001 */
#define AS_CURRENT_SET_REG 0x03
#define AS_CURRENT_ASSIST_LIGHT_SHIFT 0
#define AS_CURRENT_LED_DET_ON (1 << 3)
#define AS_CURRENT_FLASH_CURRENT_SHIFT 4
/* Read / Write (Control register): Reset state: 1011 0100 */
#define AS_CONTROL_REG 0x04
#define AS_CONTROL_MODE_SETTING_SHIFT 0
#define AS_CONTROL_STROBE_ON (1 << 2)
#define AS_CONTROL_OUT_ON (1 << 3)
#define AS_CONTROL_EXT_TORCH_ON (1 << 4)
#define AS_CONTROL_STROBE_TYPE_EDGE (0 << 5)
#define AS_CONTROL_STROBE_TYPE_LEVEL (1 << 5)
#define AS_CONTROL_COIL_PEAK_SHIFT 6
/* Read only (D3 is read / write) (Fault and info): Reset state: 0000 x000 */
#define AS_FAULT_INFO_REG 0x05
#define AS_FAULT_INFO_INDUCTOR_PEAK_LIMIT (1 << 1)
#define AS_FAULT_INFO_INDICATOR_LED (1 << 2)
#define AS_FAULT_INFO_LED_AMOUNT (1 << 3)
#define AS_FAULT_INFO_TIMEOUT (1 << 4)
#define AS_FAULT_INFO_OVER_TEMPERATURE (1 << 5)
#define AS_FAULT_INFO_SHORT_CIRCUIT (1 << 6)
#define AS_FAULT_INFO_OVER_VOLTAGE (1 << 7)
/* Boost register */
#define AS_BOOST_REG 0x0d
#define AS_BOOST_CURRENT_DISABLE (0 << 0)
#define AS_BOOST_CURRENT_ENABLE (1 << 0)
/* Password register is used to unlock boost register writing */
#define AS_PASSWORD_REG 0x0f
#define AS_PASSWORD_UNLOCK_VALUE 0x55
enum as_mode {
AS_MODE_EXT_TORCH = 0 << AS_CONTROL_MODE_SETTING_SHIFT,
AS_MODE_INDICATOR = 1 << AS_CONTROL_MODE_SETTING_SHIFT,
AS_MODE_ASSIST = 2 << AS_CONTROL_MODE_SETTING_SHIFT,
AS_MODE_FLASH = 3 << AS_CONTROL_MODE_SETTING_SHIFT,
};
/*
* struct as3645a
*
* @subdev: V4L2 subdev
* @pdata: Flash platform data
* @power_lock: Protects power_count
* @power_count: Power reference count
* @led_mode: V4L2 flash LED mode
* @timeout: Flash timeout in microseconds
* @flash_current: Flash current (0=200mA ... 15=500mA). Maximum
* values are 400mA for two LEDs and 500mA for one LED.
* @assist_current: Torch/Assist light current (0=20mA, 1=40mA ... 7=160mA)
* @indicator_current: Indicator LED current (0=0mA, 1=2.5mA ... 4=10mA)
* @strobe_source: Flash strobe source (software or external)
*/
struct as3645a {
struct v4l2_subdev subdev;
const struct as3645a_platform_data *pdata;
struct mutex power_lock;
int power_count;
/* Controls */
struct v4l2_ctrl_handler ctrls;
enum v4l2_flash_led_mode led_mode;
unsigned int timeout;
u8 flash_current;
u8 assist_current;
u8 indicator_current;
enum v4l2_flash_strobe_source strobe_source;
};
#define to_as3645a(sd) container_of(sd, struct as3645a, subdev)
/* Return negative errno else zero on success */
static int as3645a_write(struct as3645a *flash, u8 addr, u8 val)
{
struct i2c_client *client = v4l2_get_subdevdata(&flash->subdev);
int rval;
rval = i2c_smbus_write_byte_data(client, addr, val);
dev_dbg(&client->dev, "Write Addr:%02X Val:%02X %s\n", addr, val,
rval < 0 ? "fail" : "ok");
return rval;
}
/* Return negative errno else a data byte received from the device. */
static int as3645a_read(struct as3645a *flash, u8 addr)
{
struct i2c_client *client = v4l2_get_subdevdata(&flash->subdev);
int rval;
rval = i2c_smbus_read_byte_data(client, addr);
dev_dbg(&client->dev, "Read Addr:%02X Val:%02X %s\n", addr, rval,
rval < 0 ? "fail" : "ok");
return rval;
}
/* -----------------------------------------------------------------------------
* Hardware configuration and trigger
*/
/*
* as3645a_set_config - Set flash configuration registers
* @flash: The flash
*
* Configure the hardware with flash, assist and indicator currents, as well as
* flash timeout.
*
* Return 0 on success, or a negative error code if an I2C communication error
* occurred.
*/
static int as3645a_set_config(struct as3645a *flash)
{
int ret;
u8 val;
val = (flash->flash_current << AS_CURRENT_FLASH_CURRENT_SHIFT)
| (flash->assist_current << AS_CURRENT_ASSIST_LIGHT_SHIFT)
| AS_CURRENT_LED_DET_ON;
ret = as3645a_write(flash, AS_CURRENT_SET_REG, val);
if (ret < 0)
return ret;
val = AS_TIMER_MS_TO_CODE(flash->timeout / 1000)
<< AS_INDICATOR_AND_TIMER_TIMEOUT_SHIFT;
val |= (flash->pdata->vref << AS_INDICATOR_AND_TIMER_VREF_SHIFT)
| ((flash->indicator_current ? flash->indicator_current - 1 : 0)
<< AS_INDICATOR_AND_TIMER_INDICATOR_SHIFT);
return as3645a_write(flash, AS_INDICATOR_AND_TIMER_REG, val);
}
/*
* as3645a_set_control - Set flash control register
* @flash: The flash
* @mode: Desired output mode
* @on: Desired output state
*
* Configure the hardware with output mode and state.
*
* Return 0 on success, or a negative error code if an I2C communication error
* occurred.
*/
static int
as3645a_set_control(struct as3645a *flash, enum as_mode mode, bool on)
{
u8 reg;
/* Configure output parameters and operation mode. */
reg = (flash->pdata->peak << AS_CONTROL_COIL_PEAK_SHIFT)
| (on ? AS_CONTROL_OUT_ON : 0)
| mode;
if (flash->led_mode == V4L2_FLASH_LED_MODE_FLASH &&
flash->strobe_source == V4L2_FLASH_STROBE_SOURCE_EXTERNAL) {
reg |= AS_CONTROL_STROBE_TYPE_LEVEL
| AS_CONTROL_STROBE_ON;
}
return as3645a_write(flash, AS_CONTROL_REG, reg);
}
/*
* as3645a_set_output - Configure output and operation mode
* @flash: Flash controller
* @strobe: Strobe the flash (only valid in flash mode)
*
* Turn the LEDs output on/off and set the operation mode based on the current
* parameters.
*
* The AS3645A can't control the indicator LED independently of the flash/torch
* LED. If the flash controller is in V4L2_FLASH_LED_MODE_NONE mode, set the
* chip to indicator mode. Otherwise set it to assist light (torch) or flash
* mode.
*
* In indicator and assist modes, turn the output on/off based on the indicator
* and torch currents. In software strobe flash mode, turn the output on/off
* based on the strobe parameter.
*/
static int as3645a_set_output(struct as3645a *flash, bool strobe)
{
enum as_mode mode;
bool on;
switch (flash->led_mode) {
case V4L2_FLASH_LED_MODE_NONE:
on = flash->indicator_current != 0;
mode = AS_MODE_INDICATOR;
break;
case V4L2_FLASH_LED_MODE_TORCH:
on = true;
mode = AS_MODE_ASSIST;
break;
case V4L2_FLASH_LED_MODE_FLASH:
on = strobe;
mode = AS_MODE_FLASH;
break;
default:
BUG();
}
/* Configure output parameters and operation mode. */
return as3645a_set_control(flash, mode, on);
}
/* -----------------------------------------------------------------------------
* V4L2 controls
*/
static int as3645a_is_active(struct as3645a *flash)
{
int ret;
ret = as3645a_read(flash, AS_CONTROL_REG);
return ret < 0 ? ret : !!(ret & AS_CONTROL_OUT_ON);
}
static int as3645a_read_fault(struct as3645a *flash)
{
struct i2c_client *client = v4l2_get_subdevdata(&flash->subdev);
int rval;
/* NOTE: reading register clear fault status */
rval = as3645a_read(flash, AS_FAULT_INFO_REG);
if (rval < 0)
return rval;
if (rval & AS_FAULT_INFO_INDUCTOR_PEAK_LIMIT)
dev_dbg(&client->dev, "Inductor Peak limit fault\n");
if (rval & AS_FAULT_INFO_INDICATOR_LED)
dev_dbg(&client->dev, "Indicator LED fault: "
"Short circuit or open loop\n");
dev_dbg(&client->dev, "%u connected LEDs\n",
rval & AS_FAULT_INFO_LED_AMOUNT ? 2 : 1);
if (rval & AS_FAULT_INFO_TIMEOUT)
dev_dbg(&client->dev, "Timeout fault\n");
if (rval & AS_FAULT_INFO_OVER_TEMPERATURE)
dev_dbg(&client->dev, "Over temperature fault\n");
if (rval & AS_FAULT_INFO_SHORT_CIRCUIT)
dev_dbg(&client->dev, "Short circuit fault\n");
if (rval & AS_FAULT_INFO_OVER_VOLTAGE)
dev_dbg(&client->dev, "Over voltage fault: "
"Indicates missing capacitor or open connection\n");
return rval;
}
static int as3645a_get_ctrl(struct v4l2_ctrl *ctrl)
{
struct as3645a *flash =
container_of(ctrl->handler, struct as3645a, ctrls);
struct i2c_client *client = v4l2_get_subdevdata(&flash->subdev);
int value;
switch (ctrl->id) {
case V4L2_CID_FLASH_FAULT:
value = as3645a_read_fault(flash);
if (value < 0)
return value;
ctrl->cur.val = 0;
if (value & AS_FAULT_INFO_SHORT_CIRCUIT)
ctrl->cur.val |= V4L2_FLASH_FAULT_SHORT_CIRCUIT;
if (value & AS_FAULT_INFO_OVER_TEMPERATURE)
ctrl->cur.val |= V4L2_FLASH_FAULT_OVER_TEMPERATURE;
if (value & AS_FAULT_INFO_TIMEOUT)
ctrl->cur.val |= V4L2_FLASH_FAULT_TIMEOUT;
if (value & AS_FAULT_INFO_OVER_VOLTAGE)
ctrl->cur.val |= V4L2_FLASH_FAULT_OVER_VOLTAGE;
if (value & AS_FAULT_INFO_INDUCTOR_PEAK_LIMIT)
ctrl->cur.val |= V4L2_FLASH_FAULT_OVER_CURRENT;
if (value & AS_FAULT_INFO_INDICATOR_LED)
ctrl->cur.val |= V4L2_FLASH_FAULT_INDICATOR;
break;
case V4L2_CID_FLASH_STROBE_STATUS:
if (flash->led_mode != V4L2_FLASH_LED_MODE_FLASH) {
ctrl->cur.val = 0;
break;
}
value = as3645a_is_active(flash);
if (value < 0)
return value;
ctrl->cur.val = value;
break;
}
dev_dbg(&client->dev, "G_CTRL %08x:%d\n", ctrl->id, ctrl->cur.val);
return 0;
}
static int as3645a_set_ctrl(struct v4l2_ctrl *ctrl)
{
struct as3645a *flash =
container_of(ctrl->handler, struct as3645a, ctrls);
struct i2c_client *client = v4l2_get_subdevdata(&flash->subdev);
int ret;
dev_dbg(&client->dev, "S_CTRL %08x:%d\n", ctrl->id, ctrl->val);
/* If a control that doesn't apply to the current mode is modified,
* we store the value and return immediately. The setting will be
* applied when the LED mode is changed. Otherwise we apply the setting
* immediately.
*/
switch (ctrl->id) {
case V4L2_CID_FLASH_LED_MODE:
if (flash->indicator_current)
return -EBUSY;
ret = as3645a_set_config(flash);
if (ret < 0)
return ret;
flash->led_mode = ctrl->val;
return as3645a_set_output(flash, false);
case V4L2_CID_FLASH_STROBE_SOURCE:
flash->strobe_source = ctrl->val;
/* Applies to flash mode only. */
if (flash->led_mode != V4L2_FLASH_LED_MODE_FLASH)
break;
return as3645a_set_output(flash, false);
case V4L2_CID_FLASH_STROBE:
if (flash->led_mode != V4L2_FLASH_LED_MODE_FLASH)
return -EBUSY;
return as3645a_set_output(flash, true);
case V4L2_CID_FLASH_STROBE_STOP:
if (flash->led_mode != V4L2_FLASH_LED_MODE_FLASH)
return -EBUSY;
return as3645a_set_output(flash, false);
case V4L2_CID_FLASH_TIMEOUT:
flash->timeout = ctrl->val;
/* Applies to flash mode only. */
if (flash->led_mode != V4L2_FLASH_LED_MODE_FLASH)
break;
return as3645a_set_config(flash);
case V4L2_CID_FLASH_INTENSITY:
flash->flash_current = (ctrl->val - AS3645A_FLASH_INTENSITY_MIN)
/ AS3645A_FLASH_INTENSITY_STEP;
/* Applies to flash mode only. */
if (flash->led_mode != V4L2_FLASH_LED_MODE_FLASH)
break;
return as3645a_set_config(flash);
case V4L2_CID_FLASH_TORCH_INTENSITY:
flash->assist_current =
(ctrl->val - AS3645A_TORCH_INTENSITY_MIN)
/ AS3645A_TORCH_INTENSITY_STEP;
/* Applies to torch mode only. */
if (flash->led_mode != V4L2_FLASH_LED_MODE_TORCH)
break;
return as3645a_set_config(flash);
case V4L2_CID_FLASH_INDICATOR_INTENSITY:
if (flash->led_mode != V4L2_FLASH_LED_MODE_NONE)
return -EBUSY;
flash->indicator_current =
(ctrl->val - AS3645A_INDICATOR_INTENSITY_MIN)
/ AS3645A_INDICATOR_INTENSITY_STEP;
ret = as3645a_set_config(flash);
if (ret < 0)
return ret;
if ((ctrl->val == 0) == (ctrl->cur.val == 0))
break;
return as3645a_set_output(flash, false);
}
return 0;
}
static const struct v4l2_ctrl_ops as3645a_ctrl_ops = {
.g_volatile_ctrl = as3645a_get_ctrl,
.s_ctrl = as3645a_set_ctrl,
};
/* -----------------------------------------------------------------------------
* V4L2 subdev core operations
*/
/* Put device into know state. */
static int as3645a_setup(struct as3645a *flash)
{
struct i2c_client *client = v4l2_get_subdevdata(&flash->subdev);
int ret;
/* clear errors */
ret = as3645a_read(flash, AS_FAULT_INFO_REG);
if (ret < 0)
return ret;
dev_dbg(&client->dev, "Fault info: %02x\n", ret);
ret = as3645a_set_config(flash);
if (ret < 0)
return ret;
ret = as3645a_set_output(flash, false);
if (ret < 0)
return ret;
/* read status */
ret = as3645a_read_fault(flash);
if (ret < 0)
return ret;
dev_dbg(&client->dev, "AS_INDICATOR_AND_TIMER_REG: %02x\n",
as3645a_read(flash, AS_INDICATOR_AND_TIMER_REG));
dev_dbg(&client->dev, "AS_CURRENT_SET_REG: %02x\n",
as3645a_read(flash, AS_CURRENT_SET_REG));
dev_dbg(&client->dev, "AS_CONTROL_REG: %02x\n",
as3645a_read(flash, AS_CONTROL_REG));
return ret & ~AS_FAULT_INFO_LED_AMOUNT ? -EIO : 0;
}
static int __as3645a_set_power(struct as3645a *flash, int on)
{
int ret;
if (!on)
as3645a_set_control(flash, AS_MODE_EXT_TORCH, false);
if (flash->pdata->set_power) {
ret = flash->pdata->set_power(&flash->subdev, on);
if (ret < 0)
return ret;
}
if (!on)
return 0;
ret = as3645a_setup(flash);
if (ret < 0) {
if (flash->pdata->set_power)
flash->pdata->set_power(&flash->subdev, 0);
}
return ret;
}
static int as3645a_set_power(struct v4l2_subdev *sd, int on)
{
struct as3645a *flash = to_as3645a(sd);
int ret = 0;
mutex_lock(&flash->power_lock);
if (flash->power_count == !on) {
ret = __as3645a_set_power(flash, !!on);
if (ret < 0)
goto done;
}
flash->power_count += on ? 1 : -1;
WARN_ON(flash->power_count < 0);
done:
mutex_unlock(&flash->power_lock);
return ret;
}
static int as3645a_registered(struct v4l2_subdev *sd)
{
struct as3645a *flash = to_as3645a(sd);
struct i2c_client *client = v4l2_get_subdevdata(sd);
int rval, man, model, rfu, version;
const char *vendor;
/* Power up the flash driver and read manufacturer ID, model ID, RFU
* and version.
*/
rval = as3645a_set_power(&flash->subdev, 1);
if (rval < 0)
return rval;
rval = as3645a_read(flash, AS_DESIGN_INFO_REG);
if (rval < 0)
goto power_off;
man = AS_DESIGN_INFO_FACTORY(rval);
model = AS_DESIGN_INFO_MODEL(rval);
rval = as3645a_read(flash, AS_VERSION_CONTROL_REG);
if (rval < 0)
goto power_off;
rfu = AS_VERSION_CONTROL_RFU(rval);
version = AS_VERSION_CONTROL_VERSION(rval);
/* Verify the chip model and version. */
if (model != 0x01 || rfu != 0x00) {
dev_err(&client->dev, "AS3645A not detected "
"(model %d rfu %d)\n", model, rfu);
rval = -ENODEV;
goto power_off;
}
switch (man) {
case 1:
vendor = "AMS, Austria Micro Systems";
break;
case 2:
vendor = "ADI, Analog Devices Inc.";
break;
case 3:
vendor = "NSC, National Semiconductor";
break;
case 4:
vendor = "NXP";
break;
case 5:
vendor = "TI, Texas Instrument";
break;
default:
vendor = "Unknown";
}
dev_info(&client->dev, "Chip vendor: %s (%d) Version: %d\n", vendor,
man, version);
rval = as3645a_write(flash, AS_PASSWORD_REG, AS_PASSWORD_UNLOCK_VALUE);
if (rval < 0)
goto power_off;
rval = as3645a_write(flash, AS_BOOST_REG, AS_BOOST_CURRENT_DISABLE);
if (rval < 0)
goto power_off;
/* Setup default values. This makes sure that the chip is in a known
* state, in case the power rail can't be controlled.
*/
rval = as3645a_setup(flash);
power_off:
as3645a_set_power(&flash->subdev, 0);
return rval;
}
static int as3645a_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
{
return as3645a_set_power(sd, 1);
}
static int as3645a_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
{
return as3645a_set_power(sd, 0);
}
static const struct v4l2_subdev_core_ops as3645a_core_ops = {
.s_power = as3645a_set_power,
};
static const struct v4l2_subdev_ops as3645a_ops = {
.core = &as3645a_core_ops,
};
static const struct v4l2_subdev_internal_ops as3645a_internal_ops = {
.registered = as3645a_registered,
.open = as3645a_open,
.close = as3645a_close,
};
/* -----------------------------------------------------------------------------
* I2C driver
*/
#ifdef CONFIG_PM
static int as3645a_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct v4l2_subdev *subdev = i2c_get_clientdata(client);
struct as3645a *flash = to_as3645a(subdev);
int rval;
if (flash->power_count == 0)
return 0;
rval = __as3645a_set_power(flash, 0);
dev_dbg(&client->dev, "Suspend %s\n", rval < 0 ? "failed" : "ok");
return rval;
}
static int as3645a_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct v4l2_subdev *subdev = i2c_get_clientdata(client);
struct as3645a *flash = to_as3645a(subdev);
int rval;
if (flash->power_count == 0)
return 0;
rval = __as3645a_set_power(flash, 1);
dev_dbg(&client->dev, "Resume %s\n", rval < 0 ? "fail" : "ok");
return rval;
}
#else
#define as3645a_suspend NULL
#define as3645a_resume NULL
#endif /* CONFIG_PM */
/*
* as3645a_init_controls - Create controls
* @flash: The flash
*
* The number of LEDs reported in platform data is used to compute default
* limits. Parameters passed through platform data can override those limits.
*/
static int as3645a_init_controls(struct as3645a *flash)
{
const struct as3645a_platform_data *pdata = flash->pdata;
struct v4l2_ctrl *ctrl;
int maximum;
v4l2_ctrl_handler_init(&flash->ctrls, 10);
/* V4L2_CID_FLASH_LED_MODE */
v4l2_ctrl_new_std_menu(&flash->ctrls, &as3645a_ctrl_ops,
V4L2_CID_FLASH_LED_MODE, 2, ~7,
V4L2_FLASH_LED_MODE_NONE);
/* V4L2_CID_FLASH_STROBE_SOURCE */
v4l2_ctrl_new_std_menu(&flash->ctrls, &as3645a_ctrl_ops,
V4L2_CID_FLASH_STROBE_SOURCE,
pdata->ext_strobe ? 1 : 0,
pdata->ext_strobe ? ~3 : ~1,
V4L2_FLASH_STROBE_SOURCE_SOFTWARE);
flash->strobe_source = V4L2_FLASH_STROBE_SOURCE_SOFTWARE;
/* V4L2_CID_FLASH_STROBE */
v4l2_ctrl_new_std(&flash->ctrls, &as3645a_ctrl_ops,
V4L2_CID_FLASH_STROBE, 0, 0, 0, 0);
/* V4L2_CID_FLASH_STROBE_STOP */
v4l2_ctrl_new_std(&flash->ctrls, &as3645a_ctrl_ops,
V4L2_CID_FLASH_STROBE_STOP, 0, 0, 0, 0);
/* V4L2_CID_FLASH_STROBE_STATUS */
ctrl = v4l2_ctrl_new_std(&flash->ctrls, &as3645a_ctrl_ops,
V4L2_CID_FLASH_STROBE_STATUS, 0, 1, 1, 1);
if (ctrl != NULL)
ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
/* V4L2_CID_FLASH_TIMEOUT */
maximum = pdata->timeout_max;
v4l2_ctrl_new_std(&flash->ctrls, &as3645a_ctrl_ops,
V4L2_CID_FLASH_TIMEOUT, AS3645A_FLASH_TIMEOUT_MIN,
maximum, AS3645A_FLASH_TIMEOUT_STEP, maximum);
flash->timeout = maximum;
/* V4L2_CID_FLASH_INTENSITY */
maximum = pdata->flash_max_current;
v4l2_ctrl_new_std(&flash->ctrls, &as3645a_ctrl_ops,
V4L2_CID_FLASH_INTENSITY, AS3645A_FLASH_INTENSITY_MIN,
maximum, AS3645A_FLASH_INTENSITY_STEP, maximum);
flash->flash_current = (maximum - AS3645A_FLASH_INTENSITY_MIN)
/ AS3645A_FLASH_INTENSITY_STEP;
/* V4L2_CID_FLASH_TORCH_INTENSITY */
maximum = pdata->torch_max_current;
v4l2_ctrl_new_std(&flash->ctrls, &as3645a_ctrl_ops,
V4L2_CID_FLASH_TORCH_INTENSITY,
AS3645A_TORCH_INTENSITY_MIN, maximum,
AS3645A_TORCH_INTENSITY_STEP,
AS3645A_TORCH_INTENSITY_MIN);
flash->assist_current = 0;
/* V4L2_CID_FLASH_INDICATOR_INTENSITY */
v4l2_ctrl_new_std(&flash->ctrls, &as3645a_ctrl_ops,
V4L2_CID_FLASH_INDICATOR_INTENSITY,
AS3645A_INDICATOR_INTENSITY_MIN,
AS3645A_INDICATOR_INTENSITY_MAX,
AS3645A_INDICATOR_INTENSITY_STEP,
AS3645A_INDICATOR_INTENSITY_MIN);
flash->indicator_current = 0;
/* V4L2_CID_FLASH_FAULT */
ctrl = v4l2_ctrl_new_std(&flash->ctrls, &as3645a_ctrl_ops,
V4L2_CID_FLASH_FAULT, 0,
V4L2_FLASH_FAULT_OVER_VOLTAGE |
V4L2_FLASH_FAULT_TIMEOUT |
V4L2_FLASH_FAULT_OVER_TEMPERATURE |
V4L2_FLASH_FAULT_SHORT_CIRCUIT, 0, 0);
if (ctrl != NULL)
ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
flash->subdev.ctrl_handler = &flash->ctrls;
return flash->ctrls.error;
}
static int as3645a_probe(struct i2c_client *client,
const struct i2c_device_id *devid)
{
struct as3645a *flash;
int ret;
if (client->dev.platform_data == NULL)
return -ENODEV;
flash = devm_kzalloc(&client->dev, sizeof(*flash), GFP_KERNEL);
if (flash == NULL)
return -ENOMEM;
flash->pdata = client->dev.platform_data;
v4l2_i2c_subdev_init(&flash->subdev, client, &as3645a_ops);
flash->subdev.internal_ops = &as3645a_internal_ops;
flash->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
ret = as3645a_init_controls(flash);
if (ret < 0)
goto done;
ret = media_entity_pads_init(&flash->subdev.entity, 0, NULL);
if (ret < 0)
goto done;
flash->subdev.entity.function = MEDIA_ENT_F_FLASH;
mutex_init(&flash->power_lock);
flash->led_mode = V4L2_FLASH_LED_MODE_NONE;
done:
if (ret < 0)
v4l2_ctrl_handler_free(&flash->ctrls);
return ret;
}
static int as3645a_remove(struct i2c_client *client)
{
struct v4l2_subdev *subdev = i2c_get_clientdata(client);
struct as3645a *flash = to_as3645a(subdev);
v4l2_device_unregister_subdev(subdev);
v4l2_ctrl_handler_free(&flash->ctrls);
media_entity_cleanup(&flash->subdev.entity);
mutex_destroy(&flash->power_lock);
return 0;
}
static const struct i2c_device_id as3645a_id_table[] = {
{ AS3645A_NAME, 0 },
{ },
};
MODULE_DEVICE_TABLE(i2c, as3645a_id_table);
static const struct dev_pm_ops as3645a_pm_ops = {
.suspend = as3645a_suspend,
.resume = as3645a_resume,
};
static struct i2c_driver as3645a_i2c_driver = {
.driver = {
.name = AS3645A_NAME,
.pm = &as3645a_pm_ops,
},
.probe = as3645a_probe,
.remove = as3645a_remove,
.id_table = as3645a_id_table,
};
module_i2c_driver(as3645a_i2c_driver);
MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
MODULE_DESCRIPTION("LED flash driver for AS3645A, LM3555 and their clones");
MODULE_LICENSE("GPL");
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