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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 | { | |
36 | struct platform_device *pdev = 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, |
09e231b3 | 60 | struct v4l2_format *f) |
326c9862 | 61 | { |
979ea1dd | 62 | struct soc_camera_platform_info *p = v4l2_get_subdevdata(sd); |
64f5905e | 63 | struct v4l2_pix_format *pix = &f->fmt.pix; |
326c9862 | 64 | |
64f5905e GL |
65 | pix->width = p->format.width; |
66 | pix->height = p->format.height; | |
326c9862 MD |
67 | return 0; |
68 | } | |
69 | ||
979ea1dd GL |
70 | static void soc_camera_platform_video_probe(struct soc_camera_device *icd, |
71 | struct platform_device *pdev) | |
326c9862 | 72 | { |
08590b96 | 73 | struct soc_camera_platform_priv *priv = get_priv(pdev); |
40e2e092 | 74 | struct soc_camera_platform_info *p = pdev->dev.platform_data; |
326c9862 | 75 | |
40e2e092 GL |
76 | priv->format.name = p->format_name; |
77 | priv->format.depth = p->format_depth; | |
78 | priv->format.fourcc = p->format.pixelformat; | |
79 | priv->format.colorspace = p->format.colorspace; | |
326c9862 MD |
80 | |
81 | icd->formats = &priv->format; | |
82 | icd->num_formats = 1; | |
326c9862 MD |
83 | } |
84 | ||
979ea1dd GL |
85 | static struct v4l2_subdev_core_ops platform_subdev_core_ops; |
86 | ||
87 | static struct v4l2_subdev_video_ops platform_subdev_video_ops = { | |
88 | .s_stream = soc_camera_platform_s_stream, | |
89 | .try_fmt = soc_camera_platform_try_fmt, | |
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 | |
a0705b07 GL |
130 | icd->width_min = 0; |
131 | icd->rect_max.width = p->format.width; | |
132 | icd->height_min = 0; | |
133 | icd->rect_max.height = p->format.height; | |
134 | icd->y_skip_top = 0; | |
135 | icd->ops = &soc_camera_platform_ops; | |
326c9862 | 136 | |
979ea1dd GL |
137 | ici = to_soc_camera_host(icd->dev.parent); |
138 | ||
139 | soc_camera_platform_video_probe(icd, pdev); | |
140 | ||
141 | v4l2_subdev_init(&priv->subdev, &platform_subdev_ops); | |
142 | v4l2_set_subdevdata(&priv->subdev, p); | |
143 | priv->subdev.grp_id = (__u32)icd; | |
144 | strncpy(priv->subdev.name, dev_name(&pdev->dev), V4L2_SUBDEV_NAME_SIZE); | |
145 | ||
146 | ret = v4l2_device_register_subdev(&ici->v4l2_dev, &priv->subdev); | |
147 | if (ret) | |
148 | goto evdrs; | |
326c9862 MD |
149 | |
150 | return ret; | |
40e2e092 | 151 | |
979ea1dd GL |
152 | evdrs: |
153 | icd->ops = NULL; | |
154 | platform_set_drvdata(pdev, NULL); | |
40e2e092 | 155 | kfree(priv); |
979ea1dd | 156 | return ret; |
326c9862 MD |
157 | } |
158 | ||
159 | static int soc_camera_platform_remove(struct platform_device *pdev) | |
160 | { | |
08590b96 | 161 | struct soc_camera_platform_priv *priv = get_priv(pdev); |
40e2e092 GL |
162 | struct soc_camera_platform_info *p = pdev->dev.platform_data; |
163 | struct soc_camera_device *icd = to_soc_camera_dev(p->dev); | |
326c9862 | 164 | |
979ea1dd | 165 | v4l2_device_unregister_subdev(&priv->subdev); |
40e2e092 | 166 | icd->ops = NULL; |
979ea1dd | 167 | platform_set_drvdata(pdev, NULL); |
326c9862 MD |
168 | kfree(priv); |
169 | return 0; | |
170 | } | |
171 | ||
172 | static struct platform_driver soc_camera_platform_driver = { | |
173 | .driver = { | |
174 | .name = "soc_camera_platform", | |
979ea1dd | 175 | .owner = THIS_MODULE, |
326c9862 MD |
176 | }, |
177 | .probe = soc_camera_platform_probe, | |
178 | .remove = soc_camera_platform_remove, | |
179 | }; | |
180 | ||
181 | static int __init soc_camera_platform_module_init(void) | |
182 | { | |
183 | return platform_driver_register(&soc_camera_platform_driver); | |
184 | } | |
185 | ||
186 | static void __exit soc_camera_platform_module_exit(void) | |
187 | { | |
01c1e4ca | 188 | platform_driver_unregister(&soc_camera_platform_driver); |
326c9862 MD |
189 | } |
190 | ||
191 | module_init(soc_camera_platform_module_init); | |
192 | module_exit(soc_camera_platform_module_exit); | |
193 | ||
194 | MODULE_DESCRIPTION("SoC Camera Platform driver"); | |
195 | MODULE_AUTHOR("Magnus Damm"); | |
196 | MODULE_LICENSE("GPL v2"); | |
40e2e092 | 197 | MODULE_ALIAS("platform:soc_camera_platform"); |