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[media] tvp7002: use control framework 

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil 2010-12-12 08:46:15 -03:00 committed by Mauro Carvalho Chehab
parent 9a775323ee
commit 0eb73de019
1 changed files with 43 additions and 74 deletions
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117
drivers/media/video/tvp7002.c
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@ -32,6 +32,7 @@
#include <media/v4l2-device.h>
#include <media/v4l2-chip-ident.h>
#include <media/v4l2-common.h>
#include <media/v4l2-ctrls.h>
#include "tvp7002_reg.h"
MODULE_DESCRIPTION("TI TVP7002 Video and Graphics Digitizer driver");
@ -421,13 +422,13 @@ static const struct tvp7002_preset_definition tvp7002_presets[] = {
/* Device definition */
struct tvp7002 {
struct v4l2_subdev sd;
struct v4l2_ctrl_handler hdl;
const struct tvp7002_config *pdata;
int ver;
int streaming;
const struct tvp7002_preset_definition *current_preset;
u8 gain;
};
/*
@ -441,6 +442,11 @@ static inline struct tvp7002 *to_tvp7002(struct v4l2_subdev *sd)
return container_of(sd, struct tvp7002, sd);
}
static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
{
return &container_of(ctrl->handler, struct tvp7002, hdl)->sd;
}
/*
* tvp7002_read - Read a value from a register in an TVP7002
* @sd: ptr to v4l2_subdev struct
@ -605,79 +611,26 @@ static int tvp7002_s_dv_preset(struct v4l2_subdev *sd,
return -EINVAL;
}
/*
* tvp7002_g_ctrl() - Get a control
* @sd: ptr to v4l2_subdev struct
* @ctrl: ptr to v4l2_control struct
*
* Get a control for a TVP7002 decoder device.
* Returns zero when successful or -EINVAL if register access fails.
*/
static int tvp7002_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
{
struct tvp7002 *device = to_tvp7002(sd);
switch (ctrl->id) {
case V4L2_CID_GAIN:
ctrl->value = device->gain;
return 0;
default:
return -EINVAL;
}
}
/*
* tvp7002_s_ctrl() - Set a control
* @sd: ptr to v4l2_subdev struct
* @ctrl: ptr to v4l2_control struct
* @ctrl: ptr to v4l2_ctrl struct
*
* Set a control in TVP7002 decoder device.
* Returns zero when successful or -EINVAL if register access fails.
*/
static int tvp7002_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
static int tvp7002_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct tvp7002 *device = to_tvp7002(sd);
struct v4l2_subdev *sd = to_sd(ctrl);
int error = 0;
switch (ctrl->id) {
case V4L2_CID_GAIN:
tvp7002_write_err(sd, TVP7002_R_FINE_GAIN,
ctrl->value & 0xff, &error);
tvp7002_write_err(sd, TVP7002_G_FINE_GAIN,
ctrl->value & 0xff, &error);
tvp7002_write_err(sd, TVP7002_B_FINE_GAIN,
ctrl->value & 0xff, &error);
if (error < 0)
return error;
/* Set only after knowing there is no error */
device->gain = ctrl->value & 0xff;
return 0;
default:
return -EINVAL;
}
}
/*
* tvp7002_queryctrl() - Query a control
* @sd: ptr to v4l2_subdev struct
* @qc: ptr to v4l2_queryctrl struct
*
* Query a control of a TVP7002 decoder device.
* Returns zero when successful or -EINVAL if register read fails.
*/
static int tvp7002_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
{
switch (qc->id) {
case V4L2_CID_GAIN:
/*
* Gain is supported [0-255, default=0, step=1]
*/
return v4l2_ctrl_query_fill(qc, 0, 255, 1, 0);
default:
return -EINVAL;
tvp7002_write_err(sd, TVP7002_R_FINE_GAIN, ctrl->val, &error);
tvp7002_write_err(sd, TVP7002_G_FINE_GAIN, ctrl->val, &error);
tvp7002_write_err(sd, TVP7002_B_FINE_GAIN, ctrl->val, &error);
return error;
}
return -EINVAL;
}
/*
@ -924,7 +877,7 @@ static int tvp7002_log_status(struct v4l2_subdev *sd)
device->streaming ? "yes" : "no");
/* Print the current value of the gain control */
v4l2_info(sd, "Gain: %u\n", device->gain);
v4l2_ctrl_handler_log_status(&device->hdl, sd->name);
return 0;
}
@ -946,13 +899,21 @@ static int tvp7002_enum_dv_presets(struct v4l2_subdev *sd,
return v4l_fill_dv_preset_info(tvp7002_presets[preset->index].preset, preset);
}
static const struct v4l2_ctrl_ops tvp7002_ctrl_ops = {
.s_ctrl = tvp7002_s_ctrl,
};
/* V4L2 core operation handlers */
static const struct v4l2_subdev_core_ops tvp7002_core_ops = {
.g_chip_ident = tvp7002_g_chip_ident,
.log_status = tvp7002_log_status,
.g_ctrl = tvp7002_g_ctrl,
.s_ctrl = tvp7002_s_ctrl,
.queryctrl = tvp7002_queryctrl,
.g_ext_ctrls = v4l2_subdev_g_ext_ctrls,
.try_ext_ctrls = v4l2_subdev_try_ext_ctrls,
.s_ext_ctrls = v4l2_subdev_s_ext_ctrls,
.g_ctrl = v4l2_subdev_g_ctrl,
.s_ctrl = v4l2_subdev_s_ctrl,
.queryctrl = v4l2_subdev_queryctrl,
.querymenu = v4l2_subdev_querymenu,
#ifdef CONFIG_VIDEO_ADV_DEBUG
.g_register = tvp7002_g_register,
.s_register = tvp7002_s_register,
@ -977,12 +938,6 @@ static const struct v4l2_subdev_ops tvp7002_ops = {
.video = &tvp7002_video_ops,
};
static struct tvp7002 tvp7002_dev = {
.streaming = 0,
.current_preset = tvp7002_presets,
.gain = 0,
};
/*
* tvp7002_probe - Probe a TVP7002 device
* @c: ptr to i2c_client struct
@ -1013,14 +968,14 @@ static int tvp7002_probe(struct i2c_client *c, const struct i2c_device_id *id)
return -ENODEV;
}
device = kmalloc(sizeof(struct tvp7002), GFP_KERNEL);
device = kzalloc(sizeof(struct tvp7002), GFP_KERNEL);
if (!device)
return -ENOMEM;
*device = tvp7002_dev;
sd = &device->sd;
device->pdata = c->dev.platform_data;
device->current_preset = tvp7002_presets;
/* Tell v4l2 the device is ready */
v4l2_i2c_subdev_init(sd, c, &tvp7002_ops);
@ -1060,6 +1015,19 @@ static int tvp7002_probe(struct i2c_client *c, const struct i2c_device_id *id)
preset.preset = device->current_preset->preset;
error = tvp7002_s_dv_preset(sd, &preset);
v4l2_ctrl_handler_init(&device->hdl, 1);
v4l2_ctrl_new_std(&device->hdl, &tvp7002_ctrl_ops,
V4L2_CID_GAIN, 0, 255, 1, 0);
sd->ctrl_handler = &device->hdl;
if (device->hdl.error) {
int err = device->hdl.error;
v4l2_ctrl_handler_free(&device->hdl);
kfree(device);
return err;
}
v4l2_ctrl_handler_setup(&device->hdl);
found_error:
if (error < 0)
kfree(device);
@ -1083,6 +1051,7 @@ static int tvp7002_remove(struct i2c_client *c)
"on address 0x%x\n", c->addr);
v4l2_device_unregister_subdev(sd);
v4l2_ctrl_handler_free(&device->hdl);
kfree(device);
return 0;
}