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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 | }; |
26 | ||
08590b96 | 27 | static struct soc_camera_platform_priv *get_priv(struct platform_device *pdev) |
326c9862 | 28 | { |
08590b96 GL |
29 | struct v4l2_subdev *subdev = platform_get_drvdata(pdev); |
30 | return container_of(subdev, struct soc_camera_platform_priv, subdev); | |
31 | } | |
32 | ||
33 | static struct soc_camera_platform_info *get_info(struct soc_camera_device *icd) | |
34 | { | |
96c75399 GL |
35 | struct platform_device *pdev = |
36 | to_platform_device(to_soc_camera_control(icd)); | |
40e2e092 | 37 | return pdev->dev.platform_data; |
326c9862 MD |
38 | } |
39 | ||
979ea1dd | 40 | static int soc_camera_platform_s_stream(struct v4l2_subdev *sd, int enable) |
326c9862 | 41 | { |
979ea1dd GL |
42 | struct soc_camera_platform_info *p = v4l2_get_subdevdata(sd); |
43 | return p->set_capture(p, enable); | |
326c9862 MD |
44 | } |
45 | ||
46 | static int soc_camera_platform_set_bus_param(struct soc_camera_device *icd, | |
47 | unsigned long flags) | |
48 | { | |
49 | return 0; | |
50 | } | |
51 | ||
52 | static unsigned long | |
53 | soc_camera_platform_query_bus_param(struct soc_camera_device *icd) | |
54 | { | |
08590b96 | 55 | struct soc_camera_platform_info *p = get_info(icd); |
326c9862 MD |
56 | return p->bus_param; |
57 | } | |
58 | ||
979ea1dd | 59 | static int soc_camera_platform_try_fmt(struct v4l2_subdev *sd, |
760697be | 60 | struct v4l2_mbus_framefmt *mf) |
326c9862 | 61 | { |
979ea1dd | 62 | struct soc_camera_platform_info *p = v4l2_get_subdevdata(sd); |
326c9862 | 63 | |
760697be GL |
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 | ||
326c9862 MD |
69 | return 0; |
70 | } | |
71 | ||
760697be GL |
72 | static struct v4l2_subdev_core_ops platform_subdev_core_ops; |
73 | ||
3805f201 | 74 | static int soc_camera_platform_enum_fmt(struct v4l2_subdev *sd, unsigned int index, |
760697be | 75 | enum v4l2_mbus_pixelcode *code) |
326c9862 | 76 | { |
760697be | 77 | struct soc_camera_platform_info *p = v4l2_get_subdevdata(sd); |
326c9862 | 78 | |
760697be GL |
79 | if (index) |
80 | return -EINVAL; | |
326c9862 | 81 | |
760697be GL |
82 | *code = p->format.code; |
83 | return 0; | |
326c9862 MD |
84 | } |
85 | ||
979ea1dd GL |
86 | static struct v4l2_subdev_video_ops platform_subdev_video_ops = { |
87 | .s_stream = soc_camera_platform_s_stream, | |
760697be GL |
88 | .try_mbus_fmt = soc_camera_platform_try_fmt, |
89 | .enum_mbus_fmt = soc_camera_platform_enum_fmt, | |
979ea1dd GL |
90 | }; |
91 | ||
92 | static struct v4l2_subdev_ops platform_subdev_ops = { | |
93 | .core = &platform_subdev_core_ops, | |
94 | .video = &platform_subdev_video_ops, | |
95 | }; | |
96 | ||
326c9862 | 97 | static struct soc_camera_ops soc_camera_platform_ops = { |
326c9862 MD |
98 | .set_bus_param = soc_camera_platform_set_bus_param, |
99 | .query_bus_param = soc_camera_platform_query_bus_param, | |
100 | }; | |
101 | ||
102 | static int soc_camera_platform_probe(struct platform_device *pdev) | |
103 | { | |
979ea1dd | 104 | struct soc_camera_host *ici; |
326c9862 | 105 | struct soc_camera_platform_priv *priv; |
40e2e092 | 106 | struct soc_camera_platform_info *p = pdev->dev.platform_data; |
326c9862 MD |
107 | struct soc_camera_device *icd; |
108 | int ret; | |
109 | ||
326c9862 MD |
110 | if (!p) |
111 | return -EINVAL; | |
112 | ||
979ea1dd GL |
113 | if (!p->dev) { |
114 | dev_err(&pdev->dev, | |
115 | "Platform has not set soc_camera_device pointer!\n"); | |
116 | return -EINVAL; | |
117 | } | |
118 | ||
326c9862 MD |
119 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
120 | if (!priv) | |
121 | return -ENOMEM; | |
122 | ||
40e2e092 | 123 | icd = to_soc_camera_dev(p->dev); |
40e2e092 | 124 | |
08590b96 GL |
125 | /* soc-camera convention: control's drvdata points to the subdev */ |
126 | platform_set_drvdata(pdev, &priv->subdev); | |
127 | /* Set the control device reference */ | |
40e2e092 | 128 | dev_set_drvdata(&icd->dev, &pdev->dev); |
979ea1dd | 129 | |
760697be | 130 | icd->ops = &soc_camera_platform_ops; |
326c9862 | 131 | |
979ea1dd GL |
132 | ici = to_soc_camera_host(icd->dev.parent); |
133 | ||
979ea1dd GL |
134 | v4l2_subdev_init(&priv->subdev, &platform_subdev_ops); |
135 | v4l2_set_subdevdata(&priv->subdev, p); | |
979ea1dd GL |
136 | strncpy(priv->subdev.name, dev_name(&pdev->dev), V4L2_SUBDEV_NAME_SIZE); |
137 | ||
138 | ret = v4l2_device_register_subdev(&ici->v4l2_dev, &priv->subdev); | |
139 | if (ret) | |
140 | goto evdrs; | |
326c9862 MD |
141 | |
142 | return ret; | |
40e2e092 | 143 | |
979ea1dd GL |
144 | evdrs: |
145 | icd->ops = NULL; | |
146 | platform_set_drvdata(pdev, NULL); | |
40e2e092 | 147 | kfree(priv); |
979ea1dd | 148 | return ret; |
326c9862 MD |
149 | } |
150 | ||
151 | static int soc_camera_platform_remove(struct platform_device *pdev) | |
152 | { | |
08590b96 | 153 | struct soc_camera_platform_priv *priv = get_priv(pdev); |
40e2e092 GL |
154 | struct soc_camera_platform_info *p = pdev->dev.platform_data; |
155 | struct soc_camera_device *icd = to_soc_camera_dev(p->dev); | |
326c9862 | 156 | |
979ea1dd | 157 | v4l2_device_unregister_subdev(&priv->subdev); |
40e2e092 | 158 | icd->ops = NULL; |
979ea1dd | 159 | platform_set_drvdata(pdev, NULL); |
326c9862 MD |
160 | kfree(priv); |
161 | return 0; | |
162 | } | |
163 | ||
164 | static struct platform_driver soc_camera_platform_driver = { | |
165 | .driver = { | |
166 | .name = "soc_camera_platform", | |
979ea1dd | 167 | .owner = THIS_MODULE, |
326c9862 MD |
168 | }, |
169 | .probe = soc_camera_platform_probe, | |
170 | .remove = soc_camera_platform_remove, | |
171 | }; | |
172 | ||
173 | static int __init soc_camera_platform_module_init(void) | |
174 | { | |
175 | return platform_driver_register(&soc_camera_platform_driver); | |
176 | } | |
177 | ||
178 | static void __exit soc_camera_platform_module_exit(void) | |
179 | { | |
01c1e4ca | 180 | platform_driver_unregister(&soc_camera_platform_driver); |
326c9862 MD |
181 | } |
182 | ||
183 | module_init(soc_camera_platform_module_init); | |
184 | module_exit(soc_camera_platform_module_exit); | |
185 | ||
186 | MODULE_DESCRIPTION("SoC Camera Platform driver"); | |
187 | MODULE_AUTHOR("Magnus Damm"); | |
188 | MODULE_LICENSE("GPL v2"); | |
40e2e092 | 189 | MODULE_ALIAS("platform:soc_camera_platform"); |