1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
/*
* 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_fill_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;
mf->field = p->format.field;
return 0;
}
static struct v4l2_subdev_core_ops platform_subdev_core_ops;
static int soc_camera_platform_enum_fmt(struct v4l2_subdev *sd, unsigned 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 int soc_camera_platform_g_crop(struct v4l2_subdev *sd,
struct v4l2_crop *a)
{
struct soc_camera_platform_info *p = v4l2_get_subdevdata(sd);
a->c.left = 0;
a->c.top = 0;
a->c.width = p->format.width;
a->c.height = p->format.height;
a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
return 0;
}
static int soc_camera_platform_cropcap(struct v4l2_subdev *sd,
struct v4l2_cropcap *a)
{
struct soc_camera_platform_info *p = v4l2_get_subdevdata(sd);
a->bounds.left = 0;
a->bounds.top = 0;
a->bounds.width = p->format.width;
a->bounds.height = p->format.height;
a->defrect = a->bounds;
a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
a->pixelaspect.numerator = 1;
a->pixelaspect.denominator = 1;
return 0;
}
static struct v4l2_subdev_video_ops platform_subdev_video_ops = {
.s_stream = soc_camera_platform_s_stream,
.enum_mbus_fmt = soc_camera_platform_enum_fmt,
.cropcap = soc_camera_platform_cropcap,
.g_crop = soc_camera_platform_g_crop,
.try_mbus_fmt = soc_camera_platform_fill_fmt,
.g_mbus_fmt = soc_camera_platform_fill_fmt,
.s_mbus_fmt = soc_camera_platform_fill_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");
|
