korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-18 17:54:13 +08:00
Code Issues Packages Projects Releases Wiki Activity
b5dcee225c
linux/drivers/media/i2c/adp1653.c
Mauro Carvalho Chehab b5dcee225c [media] include/media: split I2C headers from V4L2 core 
Currently, include/media is messy, as it contains both the V4L2 core
headers and some driver-specific headers on the same place. That makes
harder to identify what core headers should be documented and what
headers belong to I2C drivers that are included only by bridge/main
drivers that would require the functions provided by them.

Let's move those i2c specific files to its own subdirectory.

The files to move were produced via the following script:
	mkdir include/media/i2c
	(cd include/media; for i in *.h; do n=`echo $i|sed s/.h$/.c/`; if [ -e ../../drivers/media/i2c/$n ]; then echo $i; git mv $i i2c/; fi; done)
	(cd include/media; for i in *.h; do n=`echo $i|sed s/.h$/.c/`; if [ -e ../../drivers/media/*/i2c/$n ]; then echo $i; git mv $i i2c/; fi; done)
	for i in include/media/*.h; do n=`basename $i`;  (for j in $(git grep -l $n); do dirname $j; done)|sort|uniq|grep -ve '^.$' > list; num=$(wc -l list|cut -d' ' -f1); if [ $num == 1 ]; then if [ "`grep i2c list`" != "" ]; then git mv $i include/media/i2c; fi; fi; done

And the references corrected via this script:
    MAIN_DIR="media/"
    PREV_DIR="media/"
    DIRS="i2c/"

    echo "Checking affected files" >&2
    for i in $DIRS; do
	for j in $(find include/$MAIN_DIR/$i -type f -name '*.h'); do
		 n=`basename $j`
		git grep -l $n
	done
    done|sort|uniq >files && (
	echo "Handling files..." >&2;
	echo "for i in \$(cat files|grep -v Documentation); do cat \$i | \\";
	(
		cd include/$MAIN_DIR;
		for j in $DIRS; do
			for i in $(ls $j); do
				echo "perl -ne 's,(include [\\\"\\<])$PREV_DIR($i)([\\\"\\>]),\1$MAIN_DIR$j\2\3,; print \$_' |\\";
			done;
		done;
		echo "cat > a && mv a \$i; done";
	);
	echo "Handling documentation..." >&2;
	echo "for i in MAINTAINERS \$(cat files); do cat \$i | \\";
	(
		cd include/$MAIN_DIR;
		for j in $DIRS; do
			for i in $(ls $j); do
				echo "  perl -ne 's,include/$PREV_DIR($i)\b,include/$MAIN_DIR$j\1,; print \$_' |\\";
			done;
		done;
		echo "cat > a && mv a \$i; done"
	);
    ) >script && . ./script

Merged Sakari Ailus patch that moves smiapp.h to include/media/i2c.

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2015-11-17 06:57:11 -02:00

567 lines
14 KiB
C
Raw Blame History

/*
* drivers/media/i2c/adp1653.c
*
* 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>
* Pavel Machek <pavel@ucw.cz>
*
* 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
*
* TODO:
* - fault interrupt handling
* - hardware strobe
* - power doesn't need to be ON if all lights are off
*
*/
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/gpio/consumer.h>
#include <media/i2c/adp1653.h>
#include <media/v4l2-device.h>
#define TIMEOUT_MAX 820000
#define TIMEOUT_STEP 54600
#define TIMEOUT_MIN (TIMEOUT_MAX - ADP1653_REG_CONFIG_TMR_SET_MAX \
* TIMEOUT_STEP)
#define TIMEOUT_US_TO_CODE(t) ((TIMEOUT_MAX + (TIMEOUT_STEP / 2) - (t)) \
/ TIMEOUT_STEP)
#define TIMEOUT_CODE_TO_US(c) (TIMEOUT_MAX - (c) * TIMEOUT_STEP)
/* Write values into ADP1653 registers. */
static int adp1653_update_hw(struct adp1653_flash *flash)
{
struct i2c_client *client = v4l2_get_subdevdata(&flash->subdev);
u8 out_sel;
u8 config = 0;
int rval;
out_sel = ADP1653_INDICATOR_INTENSITY_uA_TO_REG(
flash->indicator_intensity->val)
<< ADP1653_REG_OUT_SEL_ILED_SHIFT;
switch (flash->led_mode->val) {
case V4L2_FLASH_LED_MODE_NONE:
break;
case V4L2_FLASH_LED_MODE_FLASH:
/* Flash mode, light on with strobe, duration from timer */
config = ADP1653_REG_CONFIG_TMR_CFG;
config |= TIMEOUT_US_TO_CODE(flash->flash_timeout->val)
<< ADP1653_REG_CONFIG_TMR_SET_SHIFT;
break;
case V4L2_FLASH_LED_MODE_TORCH:
/* Torch mode, light immediately on, duration indefinite */
out_sel |= ADP1653_FLASH_INTENSITY_mA_TO_REG(
flash->torch_intensity->val)
<< ADP1653_REG_OUT_SEL_HPLED_SHIFT;
break;
}
rval = i2c_smbus_write_byte_data(client, ADP1653_REG_OUT_SEL, out_sel);
if (rval < 0)
return rval;
rval = i2c_smbus_write_byte_data(client, ADP1653_REG_CONFIG, config);
if (rval < 0)
return rval;
return 0;
}
static int adp1653_get_fault(struct adp1653_flash *flash)
{
struct i2c_client *client = v4l2_get_subdevdata(&flash->subdev);
int fault;
int rval;
fault = i2c_smbus_read_byte_data(client, ADP1653_REG_FAULT);
if (IS_ERR_VALUE(fault))
return fault;
flash->fault |= fault;
if (!flash->fault)
return 0;
/* Clear faults. */
rval = i2c_smbus_write_byte_data(client, ADP1653_REG_OUT_SEL, 0);
if (IS_ERR_VALUE(rval))
return rval;
flash->led_mode->val = V4L2_FLASH_LED_MODE_NONE;
rval = adp1653_update_hw(flash);
if (IS_ERR_VALUE(rval))
return rval;
return flash->fault;
}
static int adp1653_strobe(struct adp1653_flash *flash, int enable)
{
struct i2c_client *client = v4l2_get_subdevdata(&flash->subdev);
u8 out_sel = ADP1653_INDICATOR_INTENSITY_uA_TO_REG(
flash->indicator_intensity->val)
<< ADP1653_REG_OUT_SEL_ILED_SHIFT;
int rval;
if (flash->led_mode->val != V4L2_FLASH_LED_MODE_FLASH)
return -EBUSY;
if (!enable)
return i2c_smbus_write_byte_data(client, ADP1653_REG_OUT_SEL,
out_sel);
out_sel |= ADP1653_FLASH_INTENSITY_mA_TO_REG(
flash->flash_intensity->val)
<< ADP1653_REG_OUT_SEL_HPLED_SHIFT;
rval = i2c_smbus_write_byte_data(client, ADP1653_REG_OUT_SEL, out_sel);
if (rval)
return rval;
/* Software strobe using i2c */
rval = i2c_smbus_write_byte_data(client, ADP1653_REG_SW_STROBE,
ADP1653_REG_SW_STROBE_SW_STROBE);
if (rval)
return rval;
return i2c_smbus_write_byte_data(client, ADP1653_REG_SW_STROBE, 0);
}
/* --------------------------------------------------------------------------
* V4L2 controls
*/
static int adp1653_get_ctrl(struct v4l2_ctrl *ctrl)
{
struct adp1653_flash *flash =
container_of(ctrl->handler, struct adp1653_flash, ctrls);
int rval;
rval = adp1653_get_fault(flash);
if (IS_ERR_VALUE(rval))
return rval;
ctrl->cur.val = 0;
if (flash->fault & ADP1653_REG_FAULT_FLT_SCP)
ctrl->cur.val |= V4L2_FLASH_FAULT_SHORT_CIRCUIT;
if (flash->fault & ADP1653_REG_FAULT_FLT_OT)
ctrl->cur.val |= V4L2_FLASH_FAULT_OVER_TEMPERATURE;
if (flash->fault & ADP1653_REG_FAULT_FLT_TMR)
ctrl->cur.val |= V4L2_FLASH_FAULT_TIMEOUT;
if (flash->fault & ADP1653_REG_FAULT_FLT_OV)
ctrl->cur.val |= V4L2_FLASH_FAULT_OVER_VOLTAGE;
flash->fault = 0;
return 0;
}
static int adp1653_set_ctrl(struct v4l2_ctrl *ctrl)
{
struct adp1653_flash *flash =
container_of(ctrl->handler, struct adp1653_flash, ctrls);
int rval;
rval = adp1653_get_fault(flash);
if (IS_ERR_VALUE(rval))
return rval;
if ((rval & (ADP1653_REG_FAULT_FLT_SCP |
ADP1653_REG_FAULT_FLT_OT |
ADP1653_REG_FAULT_FLT_OV)) &&
(ctrl->id == V4L2_CID_FLASH_STROBE ||
ctrl->id == V4L2_CID_FLASH_TORCH_INTENSITY ||
ctrl->id == V4L2_CID_FLASH_LED_MODE))
return -EBUSY;
switch (ctrl->id) {
case V4L2_CID_FLASH_STROBE:
return adp1653_strobe(flash, 1);
case V4L2_CID_FLASH_STROBE_STOP:
return adp1653_strobe(flash, 0);
}
return adp1653_update_hw(flash);
}
static const struct v4l2_ctrl_ops adp1653_ctrl_ops = {
.g_volatile_ctrl = adp1653_get_ctrl,
.s_ctrl = adp1653_set_ctrl,
};
static int adp1653_init_controls(struct adp1653_flash *flash)
{
struct v4l2_ctrl *fault;
v4l2_ctrl_handler_init(&flash->ctrls, 9);
flash->led_mode =
v4l2_ctrl_new_std_menu(&flash->ctrls, &adp1653_ctrl_ops,
V4L2_CID_FLASH_LED_MODE,
V4L2_FLASH_LED_MODE_TORCH, ~0x7, 0);
v4l2_ctrl_new_std_menu(&flash->ctrls, &adp1653_ctrl_ops,
V4L2_CID_FLASH_STROBE_SOURCE,
V4L2_FLASH_STROBE_SOURCE_SOFTWARE, ~0x1, 0);
v4l2_ctrl_new_std(&flash->ctrls, &adp1653_ctrl_ops,
V4L2_CID_FLASH_STROBE, 0, 0, 0, 0);
v4l2_ctrl_new_std(&flash->ctrls, &adp1653_ctrl_ops,
V4L2_CID_FLASH_STROBE_STOP, 0, 0, 0, 0);
flash->flash_timeout =
v4l2_ctrl_new_std(&flash->ctrls, &adp1653_ctrl_ops,
V4L2_CID_FLASH_TIMEOUT, TIMEOUT_MIN,
flash->platform_data->max_flash_timeout,
TIMEOUT_STEP,
flash->platform_data->max_flash_timeout);
flash->flash_intensity =
v4l2_ctrl_new_std(&flash->ctrls, &adp1653_ctrl_ops,
V4L2_CID_FLASH_INTENSITY,
ADP1653_FLASH_INTENSITY_MIN,
flash->platform_data->max_flash_intensity,
1, flash->platform_data->max_flash_intensity);
flash->torch_intensity =
v4l2_ctrl_new_std(&flash->ctrls, &adp1653_ctrl_ops,
V4L2_CID_FLASH_TORCH_INTENSITY,
ADP1653_TORCH_INTENSITY_MIN,
flash->platform_data->max_torch_intensity,
ADP1653_FLASH_INTENSITY_STEP,
flash->platform_data->max_torch_intensity);
flash->indicator_intensity =
v4l2_ctrl_new_std(&flash->ctrls, &adp1653_ctrl_ops,
V4L2_CID_FLASH_INDICATOR_INTENSITY,
ADP1653_INDICATOR_INTENSITY_MIN,
flash->platform_data->max_indicator_intensity,
ADP1653_INDICATOR_INTENSITY_STEP,
ADP1653_INDICATOR_INTENSITY_MIN);
fault = v4l2_ctrl_new_std(&flash->ctrls, &adp1653_ctrl_ops,
V4L2_CID_FLASH_FAULT, 0,
V4L2_FLASH_FAULT_OVER_VOLTAGE
| V4L2_FLASH_FAULT_OVER_TEMPERATURE
| V4L2_FLASH_FAULT_SHORT_CIRCUIT, 0, 0);
if (flash->ctrls.error)
return flash->ctrls.error;
fault->flags |= V4L2_CTRL_FLAG_VOLATILE;
flash->subdev.ctrl_handler = &flash->ctrls;
return 0;
}
/* --------------------------------------------------------------------------
* V4L2 subdev operations
*/
static int
adp1653_init_device(struct adp1653_flash *flash)
{
struct i2c_client *client = v4l2_get_subdevdata(&flash->subdev);
int rval;
/* Clear FAULT register by writing zero to OUT_SEL */
rval = i2c_smbus_write_byte_data(client, ADP1653_REG_OUT_SEL, 0);
if (rval < 0) {
dev_err(&client->dev, "failed writing fault register\n");
return -EIO;
}
mutex_lock(flash->ctrls.lock);
/* Reset faults before reading new ones. */
flash->fault = 0;
rval = adp1653_get_fault(flash);
mutex_unlock(flash->ctrls.lock);
if (rval > 0) {
dev_err(&client->dev, "faults detected: 0x%1.1x\n", rval);
return -EIO;
}
mutex_lock(flash->ctrls.lock);
rval = adp1653_update_hw(flash);
mutex_unlock(flash->ctrls.lock);
if (rval) {
dev_err(&client->dev,
"adp1653_update_hw failed at %s\n", __func__);
return -EIO;
}
return 0;
}
static int
__adp1653_set_power(struct adp1653_flash *flash, int on)
{
int ret;
if (flash->platform_data->power) {
ret = flash->platform_data->power(&flash->subdev, on);
if (ret < 0)
return ret;
} else {
gpiod_set_value(flash->platform_data->enable_gpio, on);
if (on)
/* Some delay is apparently required. */
udelay(20);
}
if (!on)
return 0;
ret = adp1653_init_device(flash);
if (ret >= 0)
return ret;
if (flash->platform_data->power)
flash->platform_data->power(&flash->subdev, 0);
else
gpiod_set_value(flash->platform_data->enable_gpio, 0);
return ret;
}
static int
adp1653_set_power(struct v4l2_subdev *subdev, int on)
{
struct adp1653_flash *flash = to_adp1653_flash(subdev);
int ret = 0;
mutex_lock(&flash->power_lock);
/* If the power count is modified from 0 to != 0 or from != 0 to 0,
* update the power state.
*/
if (flash->power_count == !on) {
ret = __adp1653_set_power(flash, !!on);
if (ret < 0)
goto done;
}
/* Update the power count. */
flash->power_count += on ? 1 : -1;
WARN_ON(flash->power_count < 0);
done:
mutex_unlock(&flash->power_lock);
return ret;
}
static int adp1653_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
{
return adp1653_set_power(sd, 1);
}
static int adp1653_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
{
return adp1653_set_power(sd, 0);
}
static const struct v4l2_subdev_core_ops adp1653_core_ops = {
.s_power = adp1653_set_power,
};
static const struct v4l2_subdev_ops adp1653_ops = {
.core = &adp1653_core_ops,
};
static const struct v4l2_subdev_internal_ops adp1653_internal_ops = {
.open = adp1653_open,
.close = adp1653_close,
};
/* --------------------------------------------------------------------------
* I2C driver
*/
#ifdef CONFIG_PM
static int adp1653_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct v4l2_subdev *subdev = i2c_get_clientdata(client);
struct adp1653_flash *flash = to_adp1653_flash(subdev);
if (!flash->power_count)
return 0;
return __adp1653_set_power(flash, 0);
}
static int adp1653_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct v4l2_subdev *subdev = i2c_get_clientdata(client);
struct adp1653_flash *flash = to_adp1653_flash(subdev);
if (!flash->power_count)
return 0;
return __adp1653_set_power(flash, 1);
}
#else
#define adp1653_suspend NULL
#define adp1653_resume NULL
#endif /* CONFIG_PM */
static int adp1653_of_init(struct i2c_client *client,
struct adp1653_flash *flash,
struct device_node *node)
{
struct adp1653_platform_data *pd;
struct device_node *child;
pd = devm_kzalloc(&client->dev, sizeof(*pd), GFP_KERNEL);
if (!pd)
return -ENOMEM;
flash->platform_data = pd;
child = of_get_child_by_name(node, "flash");
if (!child)
return -EINVAL;
if (of_property_read_u32(child, "flash-timeout-us",
&pd->max_flash_timeout))
goto err;
if (of_property_read_u32(child, "flash-max-microamp",
&pd->max_flash_intensity))
goto err;
pd->max_flash_intensity /= 1000;
if (of_property_read_u32(child, "led-max-microamp",
&pd->max_torch_intensity))
goto err;
pd->max_torch_intensity /= 1000;
of_node_put(child);
child = of_get_child_by_name(node, "indicator");
if (!child)
return -EINVAL;
if (of_property_read_u32(child, "led-max-microamp",
&pd->max_indicator_intensity))
goto err;
of_node_put(child);
pd->enable_gpio = devm_gpiod_get(&client->dev, "enable", GPIOD_OUT_LOW);
if (!pd->enable_gpio) {
dev_err(&client->dev, "Error getting GPIO\n");
return -EINVAL;
}
return 0;
err:
dev_err(&client->dev, "Required property not found\n");
of_node_put(child);
return -EINVAL;
}
static int adp1653_probe(struct i2c_client *client,
const struct i2c_device_id *devid)
{
struct adp1653_flash *flash;
int ret;
flash = devm_kzalloc(&client->dev, sizeof(*flash), GFP_KERNEL);
if (flash == NULL)
return -ENOMEM;
if (client->dev.of_node) {
ret = adp1653_of_init(client, flash, client->dev.of_node);
if (ret)
return ret;
} else {
if (!client->dev.platform_data) {
dev_err(&client->dev,
"Neither DT not platform data provided\n");
return EINVAL;
}
flash->platform_data = client->dev.platform_data;
}
mutex_init(&flash->power_lock);
v4l2_i2c_subdev_init(&flash->subdev, client, &adp1653_ops);
flash->subdev.internal_ops = &adp1653_internal_ops;
flash->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
ret = adp1653_init_controls(flash);
if (ret)
goto free_and_quit;
ret = media_entity_init(&flash->subdev.entity, 0, NULL, 0);
if (ret < 0)
goto free_and_quit;
flash->subdev.entity.type = MEDIA_ENT_T_V4L2_SUBDEV_FLASH;
return 0;
free_and_quit:
dev_err(&client->dev, "adp1653: failed to register device\n");
v4l2_ctrl_handler_free(&flash->ctrls);
return ret;
}
static int adp1653_remove(struct i2c_client *client)
{
struct v4l2_subdev *subdev = i2c_get_clientdata(client);
struct adp1653_flash *flash = to_adp1653_flash(subdev);
v4l2_device_unregister_subdev(&flash->subdev);
v4l2_ctrl_handler_free(&flash->ctrls);
media_entity_cleanup(&flash->subdev.entity);
return 0;
}
static const struct i2c_device_id adp1653_id_table[] = {
{ ADP1653_NAME, 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, adp1653_id_table);
static const struct dev_pm_ops adp1653_pm_ops = {
.suspend = adp1653_suspend,
.resume = adp1653_resume,
};
static struct i2c_driver adp1653_i2c_driver = {
.driver = {
.name = ADP1653_NAME,
.pm = &adp1653_pm_ops,
},
.probe = adp1653_probe,
.remove = adp1653_remove,
.id_table = adp1653_id_table,
};
module_i2c_driver(adp1653_i2c_driver);
MODULE_AUTHOR("Sakari Ailus <sakari.ailus@nokia.com>");
MODULE_DESCRIPTION("Analog Devices ADP1653 LED flash driver");
MODULE_LICENSE("GPL");
Reference in New Issue View Git Blame Copy Permalink