linux/drivers/media/video/soc_camera_platform.c

213 lines
5.4 KiB
C
Raw Normal View History

/*
* 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-common.h>
#include <media/soc_camera.h>
#include <media/soc_camera_platform.h>
struct soc_camera_platform_priv {
struct soc_camera_data_format format;
};
static struct soc_camera_platform_info *
soc_camera_platform_get_info(struct soc_camera_device *icd)
{
struct platform_device *pdev = to_platform_device(dev_get_drvdata(&icd->dev));
return pdev->dev.platform_data;
}
static int soc_camera_platform_init(struct soc_camera_device *icd)
{
struct soc_camera_link *icl = to_soc_camera_link(icd);
if (icl->power)
icl->power(dev_get_drvdata(&icd->dev), 1);
return 0;
}
static int soc_camera_platform_release(struct soc_camera_device *icd)
{
struct soc_camera_link *icl = to_soc_camera_link(icd);
if (icl->power)
icl->power(dev_get_drvdata(&icd->dev), 0);
return 0;
}
static int soc_camera_platform_start_capture(struct soc_camera_device *icd)
{
struct soc_camera_platform_info *p = soc_camera_platform_get_info(icd);
return p->set_capture(p, 1);
}
static int soc_camera_platform_stop_capture(struct soc_camera_device *icd)
{
struct soc_camera_platform_info *p = soc_camera_platform_get_info(icd);
return p->set_capture(p, 0);
}
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 = soc_camera_platform_get_info(icd);
return p->bus_param;
}
static int soc_camera_platform_set_crop(struct soc_camera_device *icd,
struct v4l2_rect *rect)
{
return 0;
}
static int soc_camera_platform_set_fmt(struct soc_camera_device *icd,
struct v4l2_format *f)
{
return 0;
}
static int soc_camera_platform_try_fmt(struct soc_camera_device *icd,
struct v4l2_format *f)
{
struct soc_camera_platform_info *p = soc_camera_platform_get_info(icd);
struct v4l2_pix_format *pix = &f->fmt.pix;
pix->width = p->format.width;
pix->height = p->format.height;
return 0;
}
static int soc_camera_platform_video_probe(struct soc_camera_device *icd,
struct platform_device *pdev)
{
struct soc_camera_platform_priv *priv = platform_get_drvdata(pdev);
struct soc_camera_platform_info *p = pdev->dev.platform_data;
int ret;
priv->format.name = p->format_name;
priv->format.depth = p->format_depth;
priv->format.fourcc = p->format.pixelformat;
priv->format.colorspace = p->format.colorspace;
icd->formats = &priv->format;
icd->num_formats = 1;
/* ..._video_start() does dev_set_drvdata(&icd->dev, &pdev->dev) */
ret = soc_camera_video_start(icd, &pdev->dev);
soc_camera_video_stop(icd);
return ret;
}
static struct soc_camera_ops soc_camera_platform_ops = {
.owner = THIS_MODULE,
.init = soc_camera_platform_init,
.release = soc_camera_platform_release,
.start_capture = soc_camera_platform_start_capture,
.stop_capture = soc_camera_platform_stop_capture,
.set_crop = soc_camera_platform_set_crop,
.set_fmt = soc_camera_platform_set_fmt,
.try_fmt = soc_camera_platform_try_fmt,
.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_platform_priv *priv;
struct soc_camera_platform_info *p = pdev->dev.platform_data;
struct soc_camera_device *icd;
int ret;
if (!p)
return -EINVAL;
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
platform_set_drvdata(pdev, priv);
icd = to_soc_camera_dev(p->dev);
if (!icd)
goto enoicd;
icd->ops = &soc_camera_platform_ops;
dev_set_drvdata(&icd->dev, &pdev->dev);
icd->width_min = 0;
icd->width_max = p->format.width;
icd->height_min = 0;
icd->height_max = p->format.height;
icd->y_skip_top = 0;
ret = soc_camera_platform_video_probe(icd, pdev);
if (ret) {
icd->ops = NULL;
kfree(priv);
}
return ret;
enoicd:
kfree(priv);
return -EINVAL;
}
static int soc_camera_platform_remove(struct platform_device *pdev)
{
struct soc_camera_platform_priv *priv = platform_get_drvdata(pdev);
struct soc_camera_platform_info *p = pdev->dev.platform_data;
struct soc_camera_device *icd = to_soc_camera_dev(p->dev);
icd->ops = NULL;
kfree(priv);
return 0;
}
static struct platform_driver soc_camera_platform_driver = {
.driver = {
.name = "soc_camera_platform",
},
.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");