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;
27 static struct soc_camera_platform_priv *get_priv(struct platform_device *pdev)
29 struct v4l2_subdev *subdev = platform_get_drvdata(pdev);
30 return container_of(subdev, struct soc_camera_platform_priv, subdev);
33 static struct soc_camera_platform_info *get_info(struct soc_camera_device *icd)
35 struct platform_device *pdev =
36 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_fill_fmt(struct v4l2_subdev *sd,
60 struct v4l2_mbus_framefmt *mf)
62 struct soc_camera_platform_info *p = v4l2_get_subdevdata(sd);
64 mf->width = p->format.width;
65 mf->height = p->format.height;
66 mf->code = p->format.code;
67 mf->colorspace = p->format.colorspace;
68 mf->field = p->format.field;
73 static struct v4l2_subdev_core_ops platform_subdev_core_ops;
75 static int soc_camera_platform_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
76 enum v4l2_mbus_pixelcode *code)
78 struct soc_camera_platform_info *p = v4l2_get_subdevdata(sd);
83 *code = p->format.code;
87 static int soc_camera_platform_g_crop(struct v4l2_subdev *sd,
90 struct soc_camera_platform_info *p = v4l2_get_subdevdata(sd);
94 a->c.width = p->format.width;
95 a->c.height = p->format.height;
96 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
101 static int soc_camera_platform_cropcap(struct v4l2_subdev *sd,
102 struct v4l2_cropcap *a)
104 struct soc_camera_platform_info *p = v4l2_get_subdevdata(sd);
108 a->bounds.width = p->format.width;
109 a->bounds.height = p->format.height;
110 a->defrect = a->bounds;
111 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
112 a->pixelaspect.numerator = 1;
113 a->pixelaspect.denominator = 1;
118 static struct v4l2_subdev_video_ops platform_subdev_video_ops = {
119 .s_stream = soc_camera_platform_s_stream,
120 .enum_mbus_fmt = soc_camera_platform_enum_fmt,
121 .cropcap = soc_camera_platform_cropcap,
122 .g_crop = soc_camera_platform_g_crop,
123 .try_mbus_fmt = soc_camera_platform_fill_fmt,
124 .g_mbus_fmt = soc_camera_platform_fill_fmt,
125 .s_mbus_fmt = soc_camera_platform_fill_fmt,
128 static struct v4l2_subdev_ops platform_subdev_ops = {
129 .core = &platform_subdev_core_ops,
130 .video = &platform_subdev_video_ops,
133 static struct soc_camera_ops soc_camera_platform_ops = {
134 .set_bus_param = soc_camera_platform_set_bus_param,
135 .query_bus_param = soc_camera_platform_query_bus_param,
138 static int soc_camera_platform_probe(struct platform_device *pdev)
140 struct soc_camera_host *ici;
141 struct soc_camera_platform_priv *priv;
142 struct soc_camera_platform_info *p = pdev->dev.platform_data;
143 struct soc_camera_device *icd;
151 "Platform has not set soc_camera_device pointer!\n");
155 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
159 icd = to_soc_camera_dev(p->dev);
161 /* soc-camera convention: control's drvdata points to the subdev */
162 platform_set_drvdata(pdev, &priv->subdev);
163 /* Set the control device reference */
164 dev_set_drvdata(&icd->dev, &pdev->dev);
166 icd->ops = &soc_camera_platform_ops;
168 ici = to_soc_camera_host(icd->dev.parent);
170 v4l2_subdev_init(&priv->subdev, &platform_subdev_ops);
171 v4l2_set_subdevdata(&priv->subdev, p);
172 strncpy(priv->subdev.name, dev_name(&pdev->dev), V4L2_SUBDEV_NAME_SIZE);
174 ret = v4l2_device_register_subdev(&ici->v4l2_dev, &priv->subdev);
182 platform_set_drvdata(pdev, NULL);
187 static int soc_camera_platform_remove(struct platform_device *pdev)
189 struct soc_camera_platform_priv *priv = get_priv(pdev);
190 struct soc_camera_platform_info *p = pdev->dev.platform_data;
191 struct soc_camera_device *icd = to_soc_camera_dev(p->dev);
193 v4l2_device_unregister_subdev(&priv->subdev);
195 platform_set_drvdata(pdev, NULL);
200 static struct platform_driver soc_camera_platform_driver = {
202 .name = "soc_camera_platform",
203 .owner = THIS_MODULE,
205 .probe = soc_camera_platform_probe,
206 .remove = soc_camera_platform_remove,
209 static int __init soc_camera_platform_module_init(void)
211 return platform_driver_register(&soc_camera_platform_driver);
214 static void __exit soc_camera_platform_module_exit(void)
216 platform_driver_unregister(&soc_camera_platform_driver);
219 module_init(soc_camera_platform_module_init);
220 module_exit(soc_camera_platform_module_exit);
222 MODULE_DESCRIPTION("SoC Camera Platform driver");
223 MODULE_AUTHOR("Magnus Damm");
224 MODULE_LICENSE("GPL v2");
225 MODULE_ALIAS("platform:soc_camera_platform");