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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> | |
979ea1dd | 19 | #include <media/v4l2-subdev.h> |
326c9862 | 20 | #include <media/soc_camera.h> |
50c616fd | 21 | #include <media/soc_camera_platform.h> |
326c9862 MD |
22 | |
23 | struct soc_camera_platform_priv { | |
979ea1dd | 24 | struct v4l2_subdev subdev; |
326c9862 MD |
25 | struct soc_camera_data_format format; |
26 | }; | |
27 | ||
08590b96 | 28 | static struct soc_camera_platform_priv *get_priv(struct platform_device *pdev) |
326c9862 | 29 | { |
08590b96 GL |
30 | struct v4l2_subdev *subdev = platform_get_drvdata(pdev); |
31 | return container_of(subdev, struct soc_camera_platform_priv, subdev); | |
32 | } | |
33 | ||
34 | static struct soc_camera_platform_info *get_info(struct soc_camera_device *icd) | |
35 | { | |
96c75399 GL |
36 | struct platform_device *pdev = |
37 | to_platform_device(to_soc_camera_control(icd)); | |
40e2e092 | 38 | return pdev->dev.platform_data; |
326c9862 MD |
39 | } |
40 | ||
979ea1dd | 41 | static int soc_camera_platform_s_stream(struct v4l2_subdev *sd, int enable) |
326c9862 | 42 | { |
979ea1dd GL |
43 | struct soc_camera_platform_info *p = v4l2_get_subdevdata(sd); |
44 | return p->set_capture(p, enable); | |
326c9862 MD |
45 | } |
46 | ||
47 | static int soc_camera_platform_set_bus_param(struct soc_camera_device *icd, | |
48 | unsigned long flags) | |
49 | { | |
50 | return 0; | |
51 | } | |
52 | ||
53 | static unsigned long | |
54 | soc_camera_platform_query_bus_param(struct soc_camera_device *icd) | |
55 | { | |
08590b96 | 56 | struct soc_camera_platform_info *p = get_info(icd); |
326c9862 MD |
57 | return p->bus_param; |
58 | } | |
59 | ||
979ea1dd | 60 | static int soc_camera_platform_try_fmt(struct v4l2_subdev *sd, |
09e231b3 | 61 | struct v4l2_format *f) |
326c9862 | 62 | { |
979ea1dd | 63 | struct soc_camera_platform_info *p = v4l2_get_subdevdata(sd); |
64f5905e | 64 | struct v4l2_pix_format *pix = &f->fmt.pix; |
326c9862 | 65 | |
64f5905e GL |
66 | pix->width = p->format.width; |
67 | pix->height = p->format.height; | |
326c9862 MD |
68 | return 0; |
69 | } | |
70 | ||
979ea1dd GL |
71 | static void soc_camera_platform_video_probe(struct soc_camera_device *icd, |
72 | struct platform_device *pdev) | |
326c9862 | 73 | { |
08590b96 | 74 | struct soc_camera_platform_priv *priv = get_priv(pdev); |
40e2e092 | 75 | struct soc_camera_platform_info *p = pdev->dev.platform_data; |
326c9862 | 76 | |
40e2e092 GL |
77 | priv->format.name = p->format_name; |
78 | priv->format.depth = p->format_depth; | |
79 | priv->format.fourcc = p->format.pixelformat; | |
80 | priv->format.colorspace = p->format.colorspace; | |
326c9862 MD |
81 | |
82 | icd->formats = &priv->format; | |
83 | icd->num_formats = 1; | |
326c9862 MD |
84 | } |
85 | ||
979ea1dd GL |
86 | static struct v4l2_subdev_core_ops platform_subdev_core_ops; |
87 | ||
88 | static struct v4l2_subdev_video_ops platform_subdev_video_ops = { | |
89 | .s_stream = soc_camera_platform_s_stream, | |
90 | .try_fmt = soc_camera_platform_try_fmt, | |
91 | }; | |
92 | ||
93 | static struct v4l2_subdev_ops platform_subdev_ops = { | |
94 | .core = &platform_subdev_core_ops, | |
95 | .video = &platform_subdev_video_ops, | |
96 | }; | |
97 | ||
326c9862 | 98 | static struct soc_camera_ops soc_camera_platform_ops = { |
326c9862 MD |
99 | .set_bus_param = soc_camera_platform_set_bus_param, |
100 | .query_bus_param = soc_camera_platform_query_bus_param, | |
101 | }; | |
102 | ||
103 | static int soc_camera_platform_probe(struct platform_device *pdev) | |
104 | { | |
979ea1dd | 105 | struct soc_camera_host *ici; |
326c9862 | 106 | struct soc_camera_platform_priv *priv; |
40e2e092 | 107 | struct soc_camera_platform_info *p = pdev->dev.platform_data; |
326c9862 MD |
108 | struct soc_camera_device *icd; |
109 | int ret; | |
110 | ||
326c9862 MD |
111 | if (!p) |
112 | return -EINVAL; | |
113 | ||
979ea1dd GL |
114 | if (!p->dev) { |
115 | dev_err(&pdev->dev, | |
116 | "Platform has not set soc_camera_device pointer!\n"); | |
117 | return -EINVAL; | |
118 | } | |
119 | ||
326c9862 MD |
120 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
121 | if (!priv) | |
122 | return -ENOMEM; | |
123 | ||
40e2e092 | 124 | icd = to_soc_camera_dev(p->dev); |
40e2e092 | 125 | |
08590b96 GL |
126 | /* soc-camera convention: control's drvdata points to the subdev */ |
127 | platform_set_drvdata(pdev, &priv->subdev); | |
128 | /* Set the control device reference */ | |
40e2e092 | 129 | dev_set_drvdata(&icd->dev, &pdev->dev); |
979ea1dd | 130 | |
a0705b07 GL |
131 | icd->y_skip_top = 0; |
132 | icd->ops = &soc_camera_platform_ops; | |
326c9862 | 133 | |
979ea1dd GL |
134 | ici = to_soc_camera_host(icd->dev.parent); |
135 | ||
136 | soc_camera_platform_video_probe(icd, pdev); | |
137 | ||
138 | v4l2_subdev_init(&priv->subdev, &platform_subdev_ops); | |
139 | v4l2_set_subdevdata(&priv->subdev, p); | |
140 | priv->subdev.grp_id = (__u32)icd; | |
141 | strncpy(priv->subdev.name, dev_name(&pdev->dev), V4L2_SUBDEV_NAME_SIZE); | |
142 | ||
143 | ret = v4l2_device_register_subdev(&ici->v4l2_dev, &priv->subdev); | |
144 | if (ret) | |
145 | goto evdrs; | |
326c9862 MD |
146 | |
147 | return ret; | |
40e2e092 | 148 | |
979ea1dd GL |
149 | evdrs: |
150 | icd->ops = NULL; | |
151 | platform_set_drvdata(pdev, NULL); | |
40e2e092 | 152 | kfree(priv); |
979ea1dd | 153 | return ret; |
326c9862 MD |
154 | } |
155 | ||
156 | static int soc_camera_platform_remove(struct platform_device *pdev) | |
157 | { | |
08590b96 | 158 | struct soc_camera_platform_priv *priv = get_priv(pdev); |
40e2e092 GL |
159 | struct soc_camera_platform_info *p = pdev->dev.platform_data; |
160 | struct soc_camera_device *icd = to_soc_camera_dev(p->dev); | |
326c9862 | 161 | |
979ea1dd | 162 | v4l2_device_unregister_subdev(&priv->subdev); |
40e2e092 | 163 | icd->ops = NULL; |
979ea1dd | 164 | platform_set_drvdata(pdev, NULL); |
326c9862 MD |
165 | kfree(priv); |
166 | return 0; | |
167 | } | |
168 | ||
169 | static struct platform_driver soc_camera_platform_driver = { | |
170 | .driver = { | |
171 | .name = "soc_camera_platform", | |
979ea1dd | 172 | .owner = THIS_MODULE, |
326c9862 MD |
173 | }, |
174 | .probe = soc_camera_platform_probe, | |
175 | .remove = soc_camera_platform_remove, | |
176 | }; | |
177 | ||
178 | static int __init soc_camera_platform_module_init(void) | |
179 | { | |
180 | return platform_driver_register(&soc_camera_platform_driver); | |
181 | } | |
182 | ||
183 | static void __exit soc_camera_platform_module_exit(void) | |
184 | { | |
01c1e4ca | 185 | platform_driver_unregister(&soc_camera_platform_driver); |
326c9862 MD |
186 | } |
187 | ||
188 | module_init(soc_camera_platform_module_init); | |
189 | module_exit(soc_camera_platform_module_exit); | |
190 | ||
191 | MODULE_DESCRIPTION("SoC Camera Platform driver"); | |
192 | MODULE_AUTHOR("Magnus Damm"); | |
193 | MODULE_LICENSE("GPL v2"); | |
40e2e092 | 194 | MODULE_ALIAS("platform:soc_camera_platform"); |