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326c9862 MD |
1 | /* |
2 | * Generic Platform Camera Driver | |
3 | * | |
4 | * Copyright (C) 2008 Magnus Damm | |
5 | * Based on mt9m001 driver, | |
6 | * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de> | |
7 | * | |
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. | |
11 | */ | |
12 | ||
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-common.h> | |
20 | #include <media/soc_camera.h> | |
50c616fd | 21 | #include <media/soc_camera_platform.h> |
326c9862 MD |
22 | |
23 | struct soc_camera_platform_priv { | |
24 | struct soc_camera_platform_info *info; | |
25 | struct soc_camera_device icd; | |
26 | struct soc_camera_data_format format; | |
27 | }; | |
28 | ||
29 | static struct soc_camera_platform_info * | |
30 | soc_camera_platform_get_info(struct soc_camera_device *icd) | |
31 | { | |
32 | struct soc_camera_platform_priv *priv; | |
33 | priv = container_of(icd, struct soc_camera_platform_priv, icd); | |
34 | return priv->info; | |
35 | } | |
36 | ||
37 | static int soc_camera_platform_init(struct soc_camera_device *icd) | |
38 | { | |
50c616fd GL |
39 | struct soc_camera_platform_info *p = soc_camera_platform_get_info(icd); |
40 | ||
41 | if (p->power) | |
42 | p->power(1); | |
43 | ||
326c9862 MD |
44 | return 0; |
45 | } | |
46 | ||
47 | static int soc_camera_platform_release(struct soc_camera_device *icd) | |
48 | { | |
50c616fd GL |
49 | struct soc_camera_platform_info *p = soc_camera_platform_get_info(icd); |
50 | ||
51 | if (p->power) | |
52 | p->power(0); | |
53 | ||
326c9862 MD |
54 | return 0; |
55 | } | |
56 | ||
57 | static int soc_camera_platform_start_capture(struct soc_camera_device *icd) | |
58 | { | |
59 | struct soc_camera_platform_info *p = soc_camera_platform_get_info(icd); | |
60 | return p->set_capture(p, 1); | |
61 | } | |
62 | ||
63 | static int soc_camera_platform_stop_capture(struct soc_camera_device *icd) | |
64 | { | |
65 | struct soc_camera_platform_info *p = soc_camera_platform_get_info(icd); | |
66 | return p->set_capture(p, 0); | |
67 | } | |
68 | ||
69 | static int soc_camera_platform_set_bus_param(struct soc_camera_device *icd, | |
70 | unsigned long flags) | |
71 | { | |
72 | return 0; | |
73 | } | |
74 | ||
75 | static unsigned long | |
76 | soc_camera_platform_query_bus_param(struct soc_camera_device *icd) | |
77 | { | |
78 | struct soc_camera_platform_info *p = soc_camera_platform_get_info(icd); | |
79 | return p->bus_param; | |
80 | } | |
81 | ||
d8fac217 GL |
82 | static int soc_camera_platform_set_fmt(struct soc_camera_device *icd, |
83 | __u32 pixfmt, struct v4l2_rect *rect) | |
326c9862 MD |
84 | { |
85 | return 0; | |
86 | } | |
87 | ||
d8fac217 GL |
88 | static int soc_camera_platform_try_fmt(struct soc_camera_device *icd, |
89 | struct v4l2_format *f) | |
326c9862 MD |
90 | { |
91 | struct soc_camera_platform_info *p = soc_camera_platform_get_info(icd); | |
64f5905e | 92 | struct v4l2_pix_format *pix = &f->fmt.pix; |
326c9862 | 93 | |
64f5905e GL |
94 | pix->width = p->format.width; |
95 | pix->height = p->format.height; | |
326c9862 MD |
96 | return 0; |
97 | } | |
98 | ||
99 | static int soc_camera_platform_video_probe(struct soc_camera_device *icd) | |
100 | { | |
101 | struct soc_camera_platform_priv *priv; | |
102 | priv = container_of(icd, struct soc_camera_platform_priv, icd); | |
103 | ||
104 | priv->format.name = priv->info->format_name; | |
105 | priv->format.depth = priv->info->format_depth; | |
106 | priv->format.fourcc = priv->info->format.pixelformat; | |
107 | priv->format.colorspace = priv->info->format.colorspace; | |
108 | ||
109 | icd->formats = &priv->format; | |
110 | icd->num_formats = 1; | |
111 | ||
112 | return soc_camera_video_start(icd); | |
113 | } | |
114 | ||
115 | static void soc_camera_platform_video_remove(struct soc_camera_device *icd) | |
116 | { | |
117 | soc_camera_video_stop(icd); | |
118 | } | |
119 | ||
120 | static struct soc_camera_ops soc_camera_platform_ops = { | |
121 | .owner = THIS_MODULE, | |
122 | .probe = soc_camera_platform_video_probe, | |
123 | .remove = soc_camera_platform_video_remove, | |
124 | .init = soc_camera_platform_init, | |
125 | .release = soc_camera_platform_release, | |
126 | .start_capture = soc_camera_platform_start_capture, | |
127 | .stop_capture = soc_camera_platform_stop_capture, | |
d8fac217 GL |
128 | .set_fmt = soc_camera_platform_set_fmt, |
129 | .try_fmt = soc_camera_platform_try_fmt, | |
326c9862 MD |
130 | .set_bus_param = soc_camera_platform_set_bus_param, |
131 | .query_bus_param = soc_camera_platform_query_bus_param, | |
132 | }; | |
133 | ||
134 | static int soc_camera_platform_probe(struct platform_device *pdev) | |
135 | { | |
136 | struct soc_camera_platform_priv *priv; | |
137 | struct soc_camera_platform_info *p; | |
138 | struct soc_camera_device *icd; | |
139 | int ret; | |
140 | ||
141 | p = pdev->dev.platform_data; | |
142 | if (!p) | |
143 | return -EINVAL; | |
144 | ||
145 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); | |
146 | if (!priv) | |
147 | return -ENOMEM; | |
148 | ||
149 | priv->info = p; | |
150 | platform_set_drvdata(pdev, priv); | |
151 | ||
152 | icd = &priv->icd; | |
153 | icd->ops = &soc_camera_platform_ops; | |
154 | icd->control = &pdev->dev; | |
155 | icd->width_min = 0; | |
156 | icd->width_max = priv->info->format.width; | |
157 | icd->height_min = 0; | |
158 | icd->height_max = priv->info->format.height; | |
159 | icd->y_skip_top = 0; | |
160 | icd->iface = priv->info->iface; | |
161 | ||
162 | ret = soc_camera_device_register(icd); | |
163 | if (ret) | |
164 | kfree(priv); | |
165 | ||
166 | return ret; | |
167 | } | |
168 | ||
169 | static int soc_camera_platform_remove(struct platform_device *pdev) | |
170 | { | |
171 | struct soc_camera_platform_priv *priv = platform_get_drvdata(pdev); | |
172 | ||
173 | soc_camera_device_unregister(&priv->icd); | |
174 | kfree(priv); | |
175 | return 0; | |
176 | } | |
177 | ||
178 | static struct platform_driver soc_camera_platform_driver = { | |
179 | .driver = { | |
180 | .name = "soc_camera_platform", | |
181 | }, | |
182 | .probe = soc_camera_platform_probe, | |
183 | .remove = soc_camera_platform_remove, | |
184 | }; | |
185 | ||
186 | static int __init soc_camera_platform_module_init(void) | |
187 | { | |
188 | return platform_driver_register(&soc_camera_platform_driver); | |
189 | } | |
190 | ||
191 | static void __exit soc_camera_platform_module_exit(void) | |
192 | { | |
01c1e4ca | 193 | platform_driver_unregister(&soc_camera_platform_driver); |
326c9862 MD |
194 | } |
195 | ||
196 | module_init(soc_camera_platform_module_init); | |
197 | module_exit(soc_camera_platform_module_exit); | |
198 | ||
199 | MODULE_DESCRIPTION("SoC Camera Platform driver"); | |
200 | MODULE_AUTHOR("Magnus Damm"); | |
201 | MODULE_LICENSE("GPL v2"); |