2 * Generic Platform Camera Driver
4 * Copyright (C) 2008 Magnus Damm
5 * Based on mt9m001 driver,
6 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
13 #include <linux/init.h>
14 #include <linux/module.h>
15 #include <linux/slab.h>
16 #include <linux/delay.h>
17 #include <linux/platform_device.h>
18 #include <linux/videodev2.h>
19 #include <media/v4l2-subdev.h>
20 #include <media/soc_camera.h>
21 #include <media/soc_camera_platform.h>
23 struct soc_camera_platform_priv {
24 struct v4l2_subdev subdev;
25 struct soc_camera_data_format format;
28 static struct soc_camera_platform_priv *get_priv(struct platform_device *pdev)
30 struct v4l2_subdev *subdev = platform_get_drvdata(pdev);
31 return container_of(subdev, struct soc_camera_platform_priv, subdev);
34 static struct soc_camera_platform_info *get_info(struct soc_camera_device *icd)
36 struct platform_device *pdev = to_platform_device(to_soc_camera_control(icd));
37 return pdev->dev.platform_data;
40 static int soc_camera_platform_s_stream(struct v4l2_subdev *sd, int enable)
42 struct soc_camera_platform_info *p = v4l2_get_subdevdata(sd);
43 return p->set_capture(p, enable);
46 static int soc_camera_platform_set_bus_param(struct soc_camera_device *icd,
53 soc_camera_platform_query_bus_param(struct soc_camera_device *icd)
55 struct soc_camera_platform_info *p = get_info(icd);
59 static int soc_camera_platform_try_fmt(struct v4l2_subdev *sd,
60 struct v4l2_format *f)
62 struct soc_camera_platform_info *p = v4l2_get_subdevdata(sd);
63 struct v4l2_pix_format *pix = &f->fmt.pix;
65 pix->width = p->format.width;
66 pix->height = p->format.height;
70 static void soc_camera_platform_video_probe(struct soc_camera_device *icd,
71 struct platform_device *pdev)
73 struct soc_camera_platform_priv *priv = get_priv(pdev);
74 struct soc_camera_platform_info *p = pdev->dev.platform_data;
76 priv->format.name = p->format_name;
77 priv->format.depth = p->format_depth;
78 priv->format.fourcc = p->format.pixelformat;
79 priv->format.colorspace = p->format.colorspace;
81 icd->formats = &priv->format;
85 static struct v4l2_subdev_core_ops platform_subdev_core_ops;
87 static struct v4l2_subdev_video_ops platform_subdev_video_ops = {
88 .s_stream = soc_camera_platform_s_stream,
89 .try_fmt = soc_camera_platform_try_fmt,
92 static struct v4l2_subdev_ops platform_subdev_ops = {
93 .core = &platform_subdev_core_ops,
94 .video = &platform_subdev_video_ops,
97 static struct soc_camera_ops soc_camera_platform_ops = {
98 .set_bus_param = soc_camera_platform_set_bus_param,
99 .query_bus_param = soc_camera_platform_query_bus_param,
102 static int soc_camera_platform_probe(struct platform_device *pdev)
104 struct soc_camera_host *ici;
105 struct soc_camera_platform_priv *priv;
106 struct soc_camera_platform_info *p = pdev->dev.platform_data;
107 struct soc_camera_device *icd;
115 "Platform has not set soc_camera_device pointer!\n");
119 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
123 icd = to_soc_camera_dev(p->dev);
125 /* soc-camera convention: control's drvdata points to the subdev */
126 platform_set_drvdata(pdev, &priv->subdev);
127 /* Set the control device reference */
128 dev_set_drvdata(&icd->dev, &pdev->dev);
131 icd->ops = &soc_camera_platform_ops;
133 ici = to_soc_camera_host(icd->dev.parent);
135 soc_camera_platform_video_probe(icd, pdev);
137 v4l2_subdev_init(&priv->subdev, &platform_subdev_ops);
138 v4l2_set_subdevdata(&priv->subdev, p);
139 priv->subdev.grp_id = (__u32)icd;
140 strncpy(priv->subdev.name, dev_name(&pdev->dev), V4L2_SUBDEV_NAME_SIZE);
142 ret = v4l2_device_register_subdev(&ici->v4l2_dev, &priv->subdev);
150 platform_set_drvdata(pdev, NULL);
155 static int soc_camera_platform_remove(struct platform_device *pdev)
157 struct soc_camera_platform_priv *priv = get_priv(pdev);
158 struct soc_camera_platform_info *p = pdev->dev.platform_data;
159 struct soc_camera_device *icd = to_soc_camera_dev(p->dev);
161 v4l2_device_unregister_subdev(&priv->subdev);
163 platform_set_drvdata(pdev, NULL);
168 static struct platform_driver soc_camera_platform_driver = {
170 .name = "soc_camera_platform",
171 .owner = THIS_MODULE,
173 .probe = soc_camera_platform_probe,
174 .remove = soc_camera_platform_remove,
177 static int __init soc_camera_platform_module_init(void)
179 return platform_driver_register(&soc_camera_platform_driver);
182 static void __exit soc_camera_platform_module_exit(void)
184 platform_driver_unregister(&soc_camera_platform_driver);
187 module_init(soc_camera_platform_module_init);
188 module_exit(soc_camera_platform_module_exit);
190 MODULE_DESCRIPTION("SoC Camera Platform driver");
191 MODULE_AUTHOR("Magnus Damm");
192 MODULE_LICENSE("GPL v2");
193 MODULE_ALIAS("platform:soc_camera_platform");