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/*
* Generic Platform Camera Driver
*
* Copyright (C) 2008 Magnus Damm
* Based on mt9m001 driver,
* Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
*
* 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.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/videodev2.h>
#include <media/v4l2-subdev.h>
#include <media/soc_camera.h>
#include <media/soc_camera_platform.h>
struct soc_camera_platform_priv {
struct v4l2_subdev subdev;
};
static struct soc_camera_platform_priv *get_priv(struct platform_device *pdev)
{
struct v4l2_subdev *subdev = platform_get_drvdata(pdev);
return container_of(subdev, struct soc_camera_platform_priv, subdev);
}
static struct soc_camera_platform_info *get_info(struct soc_camera_device *icd)
{
struct platform_device *pdev =
to_platform_device(to_soc_camera_control(icd));
return pdev->dev.platform_data;
}
static int soc_camera_platform_s_stream(struct v4l2_subdev *sd, int enable)
{
struct soc_camera_platform_info *p = v4l2_get_subdevdata(sd);
return p->set_capture(p, enable);
}
static int soc_camera_platform_set_bus_param(struct soc_camera_device *icd,
unsigned long flags)
{
return 0;
}
static unsigned long
soc_camera_platform_query_bus_param(struct soc_camera_device *icd)
{
struct soc_camera_platform_info *p = get_info(icd);
return p->bus_param;
}
static int soc_camera_platform_try_fmt(struct v4l2_subdev *sd,
struct v4l2_mbus_framefmt *mf)
{
struct soc_camera_platform_info *p = v4l2_get_subdevdata(sd);
mf->width = p->format.width;
mf->height = p->format.height;
mf->code = p->format.code;
mf->colorspace = p->format.colorspace;
return 0;
}
static struct v4l2_subdev_core_ops platform_subdev_core_ops;
static int soc_camera_platform_enum_fmt(struct v4l2_subdev *sd, int index,
enum v4l2_mbus_pixelcode *code)
{
struct soc_camera_platform_info *p = v4l2_get_subdevdata(sd);
if (index)
return -EINVAL;
*code = p->format.code;
return 0;
}
static struct v4l2_subdev_video_ops platform_subdev_video_ops = {
.s_stream = soc_camera_platform_s_stream,
.try_mbus_fmt = soc_camera_platform_try_fmt,
.enum_mbus_fmt = soc_camera_platform_enum_fmt,
};
static struct v4l2_subdev_ops platform_subdev_ops = {
.core = &platform_subdev_core_ops,
.video = &platform_subdev_video_ops,
};
static struct soc_camera_ops soc_camera_platform_ops = {
.set_bus_param = soc_camera_platform_set_bus_param,
.query_bus_param = soc_camera_platform_query_bus_param,
};
static int soc_camera_platform_probe(struct platform_device *pdev)
{
struct soc_camera_host *ici;
struct soc_camera_platform_priv *priv;
struct soc_camera_platform_info *p = pdev->dev.platform_data;
struct soc_camera_device *icd;
int ret;
if (!p)
return -EINVAL;
if (!p->dev) {
dev_err(&pdev->dev,
"Platform has not set soc_camera_device pointer!\n");
return -EINVAL;
}
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
icd = to_soc_camera_dev(p->dev);
/* soc-camera convention: control's drvdata points to the subdev */
platform_set_drvdata(pdev, &priv->subdev);
/* Set the control device reference */
dev_set_drvdata(&icd->dev, &pdev->dev);
icd->ops = &soc_camera_platform_ops;
ici = to_soc_camera_host(icd->dev.parent);
v4l2_subdev_init(&priv->subdev, &platform_subdev_ops);
v4l2_set_subdevdata(&priv->subdev, p);
strncpy(priv->subdev.name, dev_name(&pdev->dev), V4L2_SUBDEV_NAME_SIZE);
ret = v4l2_device_register_subdev(&ici->v4l2_dev, &priv->subdev);
if (ret)
goto evdrs;
return ret;
evdrs:
icd->ops = NULL;
platform_set_drvdata(pdev, NULL);
kfree(priv);
return ret;
}
static int soc_camera_platform_remove(struct platform_device *pdev)
{
struct soc_camera_platform_priv *priv = get_priv(pdev);
struct soc_camera_platform_info *p = pdev->dev.platform_data;
struct soc_camera_device *icd = to_soc_camera_dev(p->dev);
v4l2_device_unregister_subdev(&priv->subdev);
icd->ops = NULL;
platform_set_drvdata(pdev, NULL);
kfree(priv);
return 0;
}
static struct platform_driver soc_camera_platform_driver = {
.driver = {
.name = "soc_camera_platform",
.owner = THIS_MODULE,
},
.probe = soc_camera_platform_probe,
.remove = soc_camera_platform_remove,
};
static int __init soc_camera_platform_module_init(void)
{
return platform_driver_register(&soc_camera_platform_driver);
}
static void __exit soc_camera_platform_module_exit(void)
{
platform_driver_unregister(&soc_camera_platform_driver);
}
module_init(soc_camera_platform_module_init);
module_exit(soc_camera_platform_module_exit);
MODULE_DESCRIPTION("SoC Camera Platform driver");
MODULE_AUTHOR("Magnus Damm");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:soc_camera_platform");
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