![Mauro Carvalho Chehab](/assets/img/avatar_default.png)
As warned: drivers/media/i2c/dw9714.c: warning: incorrect type in initializer (different base types): => 64:19 Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
285 lines
7.5 KiB
C
285 lines
7.5 KiB
C
/*
|
|
* Copyright (c) 2015--2017 Intel Corporation.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <linux/delay.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/module.h>
|
|
#include <linux/pm_runtime.h>
|
|
#include <media/v4l2-ctrls.h>
|
|
#include <media/v4l2-device.h>
|
|
|
|
#define DW9714_NAME "dw9714"
|
|
#define DW9714_MAX_FOCUS_POS 1023
|
|
/*
|
|
* This sets the minimum granularity for the focus positions.
|
|
* A value of 1 gives maximum accuracy for a desired focus position
|
|
*/
|
|
#define DW9714_FOCUS_STEPS 1
|
|
/*
|
|
* This acts as the minimum granularity of lens movement.
|
|
* Keep this value power of 2, so the control steps can be
|
|
* uniformly adjusted for gradual lens movement, with desired
|
|
* number of control steps.
|
|
*/
|
|
#define DW9714_CTRL_STEPS 16
|
|
#define DW9714_CTRL_DELAY_US 1000
|
|
/*
|
|
* S[3:2] = 0x00, codes per step for "Linear Slope Control"
|
|
* S[1:0] = 0x00, step period
|
|
*/
|
|
#define DW9714_DEFAULT_S 0x0
|
|
#define DW9714_VAL(data, s) ((data) << 4 | (s))
|
|
|
|
/* dw9714 device structure */
|
|
struct dw9714_device {
|
|
struct v4l2_ctrl_handler ctrls_vcm;
|
|
struct v4l2_subdev sd;
|
|
u16 current_val;
|
|
};
|
|
|
|
static inline struct dw9714_device *to_dw9714_vcm(struct v4l2_ctrl *ctrl)
|
|
{
|
|
return container_of(ctrl->handler, struct dw9714_device, ctrls_vcm);
|
|
}
|
|
|
|
static inline struct dw9714_device *sd_to_dw9714_vcm(struct v4l2_subdev *subdev)
|
|
{
|
|
return container_of(subdev, struct dw9714_device, sd);
|
|
}
|
|
|
|
static int dw9714_i2c_write(struct i2c_client *client, u16 data)
|
|
{
|
|
int ret;
|
|
__be16 val = cpu_to_be16(data);
|
|
|
|
ret = i2c_master_send(client, (const char *)&val, sizeof(val));
|
|
if (ret != sizeof(val)) {
|
|
dev_err(&client->dev, "I2C write fail\n");
|
|
return -EIO;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int dw9714_t_focus_vcm(struct dw9714_device *dw9714_dev, u16 val)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(&dw9714_dev->sd);
|
|
|
|
dw9714_dev->current_val = val;
|
|
|
|
return dw9714_i2c_write(client, DW9714_VAL(val, DW9714_DEFAULT_S));
|
|
}
|
|
|
|
static int dw9714_set_ctrl(struct v4l2_ctrl *ctrl)
|
|
{
|
|
struct dw9714_device *dev_vcm = to_dw9714_vcm(ctrl);
|
|
|
|
if (ctrl->id == V4L2_CID_FOCUS_ABSOLUTE)
|
|
return dw9714_t_focus_vcm(dev_vcm, ctrl->val);
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static const struct v4l2_ctrl_ops dw9714_vcm_ctrl_ops = {
|
|
.s_ctrl = dw9714_set_ctrl,
|
|
};
|
|
|
|
static int dw9714_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
|
|
{
|
|
int rval;
|
|
|
|
rval = pm_runtime_get_sync(sd->dev);
|
|
if (rval < 0) {
|
|
pm_runtime_put_noidle(sd->dev);
|
|
return rval;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dw9714_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
|
|
{
|
|
pm_runtime_put(sd->dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct v4l2_subdev_internal_ops dw9714_int_ops = {
|
|
.open = dw9714_open,
|
|
.close = dw9714_close,
|
|
};
|
|
|
|
static const struct v4l2_subdev_ops dw9714_ops = { };
|
|
|
|
static void dw9714_subdev_cleanup(struct dw9714_device *dw9714_dev)
|
|
{
|
|
v4l2_async_unregister_subdev(&dw9714_dev->sd);
|
|
v4l2_ctrl_handler_free(&dw9714_dev->ctrls_vcm);
|
|
media_entity_cleanup(&dw9714_dev->sd.entity);
|
|
}
|
|
|
|
static int dw9714_init_controls(struct dw9714_device *dev_vcm)
|
|
{
|
|
struct v4l2_ctrl_handler *hdl = &dev_vcm->ctrls_vcm;
|
|
const struct v4l2_ctrl_ops *ops = &dw9714_vcm_ctrl_ops;
|
|
|
|
v4l2_ctrl_handler_init(hdl, 1);
|
|
|
|
v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FOCUS_ABSOLUTE,
|
|
0, DW9714_MAX_FOCUS_POS, DW9714_FOCUS_STEPS, 0);
|
|
|
|
if (hdl->error)
|
|
dev_err(dev_vcm->sd.dev, "%s fail error: 0x%x\n",
|
|
__func__, hdl->error);
|
|
dev_vcm->sd.ctrl_handler = hdl;
|
|
return hdl->error;
|
|
}
|
|
|
|
static int dw9714_probe(struct i2c_client *client)
|
|
{
|
|
struct dw9714_device *dw9714_dev;
|
|
int rval;
|
|
|
|
dw9714_dev = devm_kzalloc(&client->dev, sizeof(*dw9714_dev),
|
|
GFP_KERNEL);
|
|
if (dw9714_dev == NULL)
|
|
return -ENOMEM;
|
|
|
|
v4l2_i2c_subdev_init(&dw9714_dev->sd, client, &dw9714_ops);
|
|
dw9714_dev->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
|
|
dw9714_dev->sd.internal_ops = &dw9714_int_ops;
|
|
|
|
rval = dw9714_init_controls(dw9714_dev);
|
|
if (rval)
|
|
goto err_cleanup;
|
|
|
|
rval = media_entity_pads_init(&dw9714_dev->sd.entity, 0, NULL);
|
|
if (rval < 0)
|
|
goto err_cleanup;
|
|
|
|
dw9714_dev->sd.entity.function = MEDIA_ENT_F_LENS;
|
|
|
|
rval = v4l2_async_register_subdev(&dw9714_dev->sd);
|
|
if (rval < 0)
|
|
goto err_cleanup;
|
|
|
|
pm_runtime_set_active(&client->dev);
|
|
pm_runtime_enable(&client->dev);
|
|
pm_runtime_idle(&client->dev);
|
|
|
|
return 0;
|
|
|
|
err_cleanup:
|
|
dw9714_subdev_cleanup(dw9714_dev);
|
|
dev_err(&client->dev, "Probe failed: %d\n", rval);
|
|
return rval;
|
|
}
|
|
|
|
static int dw9714_remove(struct i2c_client *client)
|
|
{
|
|
struct v4l2_subdev *sd = i2c_get_clientdata(client);
|
|
struct dw9714_device *dw9714_dev = sd_to_dw9714_vcm(sd);
|
|
|
|
pm_runtime_disable(&client->dev);
|
|
dw9714_subdev_cleanup(dw9714_dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This function sets the vcm position, so it consumes least current
|
|
* The lens position is gradually moved in units of DW9714_CTRL_STEPS,
|
|
* to make the movements smoothly.
|
|
*/
|
|
static int __maybe_unused dw9714_vcm_suspend(struct device *dev)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct v4l2_subdev *sd = i2c_get_clientdata(client);
|
|
struct dw9714_device *dw9714_dev = sd_to_dw9714_vcm(sd);
|
|
int ret, val;
|
|
|
|
for (val = dw9714_dev->current_val & ~(DW9714_CTRL_STEPS - 1);
|
|
val >= 0; val -= DW9714_CTRL_STEPS) {
|
|
ret = dw9714_i2c_write(client,
|
|
DW9714_VAL(val, DW9714_DEFAULT_S));
|
|
if (ret)
|
|
dev_err_once(dev, "%s I2C failure: %d", __func__, ret);
|
|
usleep_range(DW9714_CTRL_DELAY_US, DW9714_CTRL_DELAY_US + 10);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This function sets the vcm position to the value set by the user
|
|
* through v4l2_ctrl_ops s_ctrl handler
|
|
* The lens position is gradually moved in units of DW9714_CTRL_STEPS,
|
|
* to make the movements smoothly.
|
|
*/
|
|
static int __maybe_unused dw9714_vcm_resume(struct device *dev)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct v4l2_subdev *sd = i2c_get_clientdata(client);
|
|
struct dw9714_device *dw9714_dev = sd_to_dw9714_vcm(sd);
|
|
int ret, val;
|
|
|
|
for (val = dw9714_dev->current_val % DW9714_CTRL_STEPS;
|
|
val < dw9714_dev->current_val + DW9714_CTRL_STEPS - 1;
|
|
val += DW9714_CTRL_STEPS) {
|
|
ret = dw9714_i2c_write(client,
|
|
DW9714_VAL(val, DW9714_DEFAULT_S));
|
|
if (ret)
|
|
dev_err_ratelimited(dev, "%s I2C failure: %d",
|
|
__func__, ret);
|
|
usleep_range(DW9714_CTRL_DELAY_US, DW9714_CTRL_DELAY_US + 10);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id dw9714_id_table[] = {
|
|
{ DW9714_NAME, 0 },
|
|
{ { 0 } }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, dw9714_id_table);
|
|
|
|
static const struct of_device_id dw9714_of_table[] = {
|
|
{ .compatible = "dongwoon,dw9714" },
|
|
{ { 0 } }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, dw9714_of_table);
|
|
|
|
static const struct dev_pm_ops dw9714_pm_ops = {
|
|
SET_SYSTEM_SLEEP_PM_OPS(dw9714_vcm_suspend, dw9714_vcm_resume)
|
|
SET_RUNTIME_PM_OPS(dw9714_vcm_suspend, dw9714_vcm_resume, NULL)
|
|
};
|
|
|
|
static struct i2c_driver dw9714_i2c_driver = {
|
|
.driver = {
|
|
.name = DW9714_NAME,
|
|
.pm = &dw9714_pm_ops,
|
|
.of_match_table = dw9714_of_table,
|
|
},
|
|
.probe_new = dw9714_probe,
|
|
.remove = dw9714_remove,
|
|
.id_table = dw9714_id_table,
|
|
};
|
|
|
|
module_i2c_driver(dw9714_i2c_driver);
|
|
|
|
MODULE_AUTHOR("Tianshu Qiu <tian.shu.qiu@intel.com>");
|
|
MODULE_AUTHOR("Jian Xu Zheng <jian.xu.zheng@intel.com>");
|
|
MODULE_AUTHOR("Yuning Pu <yuning.pu@intel.com>");
|
|
MODULE_AUTHOR("Jouni Ukkonen <jouni.ukkonen@intel.com>");
|
|
MODULE_AUTHOR("Tommi Franttila <tommi.franttila@intel.com>");
|
|
MODULE_DESCRIPTION("DW9714 VCM driver");
|
|
MODULE_LICENSE("GPL v2");
|