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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 | ||
e7d403f5 KM |
59 | static int soc_camera_platform_fill_fmt(struct v4l2_subdev *sd, |
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; | |
e7d403f5 | 68 | mf->field = p->format.field; |
760697be | 69 | |
326c9862 MD |
70 | return 0; |
71 | } | |
72 | ||
760697be GL |
73 | static struct v4l2_subdev_core_ops platform_subdev_core_ops; |
74 | ||
3805f201 | 75 | static int soc_camera_platform_enum_fmt(struct v4l2_subdev *sd, unsigned int index, |
760697be | 76 | enum v4l2_mbus_pixelcode *code) |
326c9862 | 77 | { |
760697be | 78 | struct soc_camera_platform_info *p = v4l2_get_subdevdata(sd); |
326c9862 | 79 | |
760697be GL |
80 | if (index) |
81 | return -EINVAL; | |
326c9862 | 82 | |
760697be GL |
83 | *code = p->format.code; |
84 | return 0; | |
326c9862 MD |
85 | } |
86 | ||
e7d403f5 KM |
87 | static int soc_camera_platform_g_crop(struct v4l2_subdev *sd, |
88 | struct v4l2_crop *a) | |
89 | { | |
90 | struct soc_camera_platform_info *p = v4l2_get_subdevdata(sd); | |
91 | ||
92 | a->c.left = 0; | |
93 | a->c.top = 0; | |
94 | a->c.width = p->format.width; | |
95 | a->c.height = p->format.height; | |
96 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
97 | ||
98 | return 0; | |
99 | } | |
100 | ||
101 | static int soc_camera_platform_cropcap(struct v4l2_subdev *sd, | |
102 | struct v4l2_cropcap *a) | |
103 | { | |
104 | struct soc_camera_platform_info *p = v4l2_get_subdevdata(sd); | |
105 | ||
106 | a->bounds.left = 0; | |
107 | a->bounds.top = 0; | |
108 | a->bounds.width = p->format.width; | |
109 | a->bounds.height = p->format.height; | |
110 | a->defrect = a->bounds; | |
111 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
112 | a->pixelaspect.numerator = 1; | |
113 | a->pixelaspect.denominator = 1; | |
114 | ||
115 | return 0; | |
116 | } | |
117 | ||
979ea1dd GL |
118 | static struct v4l2_subdev_video_ops platform_subdev_video_ops = { |
119 | .s_stream = soc_camera_platform_s_stream, | |
760697be | 120 | .enum_mbus_fmt = soc_camera_platform_enum_fmt, |
e7d403f5 KM |
121 | .cropcap = soc_camera_platform_cropcap, |
122 | .g_crop = soc_camera_platform_g_crop, | |
123 | .try_mbus_fmt = soc_camera_platform_fill_fmt, | |
124 | .g_mbus_fmt = soc_camera_platform_fill_fmt, | |
125 | .s_mbus_fmt = soc_camera_platform_fill_fmt, | |
979ea1dd GL |
126 | }; |
127 | ||
128 | static struct v4l2_subdev_ops platform_subdev_ops = { | |
129 | .core = &platform_subdev_core_ops, | |
130 | .video = &platform_subdev_video_ops, | |
131 | }; | |
132 | ||
326c9862 | 133 | static struct soc_camera_ops soc_camera_platform_ops = { |
326c9862 MD |
134 | .set_bus_param = soc_camera_platform_set_bus_param, |
135 | .query_bus_param = soc_camera_platform_query_bus_param, | |
136 | }; | |
137 | ||
138 | static int soc_camera_platform_probe(struct platform_device *pdev) | |
139 | { | |
979ea1dd | 140 | struct soc_camera_host *ici; |
326c9862 | 141 | struct soc_camera_platform_priv *priv; |
40e2e092 | 142 | struct soc_camera_platform_info *p = pdev->dev.platform_data; |
326c9862 MD |
143 | struct soc_camera_device *icd; |
144 | int ret; | |
145 | ||
326c9862 MD |
146 | if (!p) |
147 | return -EINVAL; | |
148 | ||
7dfff953 | 149 | if (!p->icd) { |
979ea1dd GL |
150 | dev_err(&pdev->dev, |
151 | "Platform has not set soc_camera_device pointer!\n"); | |
152 | return -EINVAL; | |
153 | } | |
154 | ||
326c9862 MD |
155 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
156 | if (!priv) | |
157 | return -ENOMEM; | |
158 | ||
7dfff953 | 159 | icd = p->icd; |
40e2e092 | 160 | |
08590b96 GL |
161 | /* soc-camera convention: control's drvdata points to the subdev */ |
162 | platform_set_drvdata(pdev, &priv->subdev); | |
163 | /* Set the control device reference */ | |
7dfff953 | 164 | icd->control = &pdev->dev; |
979ea1dd | 165 | |
760697be | 166 | icd->ops = &soc_camera_platform_ops; |
326c9862 | 167 | |
7dfff953 | 168 | ici = to_soc_camera_host(icd->parent); |
979ea1dd | 169 | |
979ea1dd GL |
170 | v4l2_subdev_init(&priv->subdev, &platform_subdev_ops); |
171 | v4l2_set_subdevdata(&priv->subdev, p); | |
979ea1dd GL |
172 | strncpy(priv->subdev.name, dev_name(&pdev->dev), V4L2_SUBDEV_NAME_SIZE); |
173 | ||
174 | ret = v4l2_device_register_subdev(&ici->v4l2_dev, &priv->subdev); | |
175 | if (ret) | |
176 | goto evdrs; | |
326c9862 MD |
177 | |
178 | return ret; | |
40e2e092 | 179 | |
979ea1dd GL |
180 | evdrs: |
181 | icd->ops = NULL; | |
182 | platform_set_drvdata(pdev, NULL); | |
40e2e092 | 183 | kfree(priv); |
979ea1dd | 184 | return ret; |
326c9862 MD |
185 | } |
186 | ||
187 | static int soc_camera_platform_remove(struct platform_device *pdev) | |
188 | { | |
08590b96 | 189 | struct soc_camera_platform_priv *priv = get_priv(pdev); |
40e2e092 | 190 | struct soc_camera_platform_info *p = pdev->dev.platform_data; |
7dfff953 | 191 | struct soc_camera_device *icd = p->icd; |
326c9862 | 192 | |
979ea1dd | 193 | v4l2_device_unregister_subdev(&priv->subdev); |
40e2e092 | 194 | icd->ops = NULL; |
979ea1dd | 195 | platform_set_drvdata(pdev, NULL); |
326c9862 MD |
196 | kfree(priv); |
197 | return 0; | |
198 | } | |
199 | ||
200 | static struct platform_driver soc_camera_platform_driver = { | |
201 | .driver = { | |
202 | .name = "soc_camera_platform", | |
979ea1dd | 203 | .owner = THIS_MODULE, |
326c9862 MD |
204 | }, |
205 | .probe = soc_camera_platform_probe, | |
206 | .remove = soc_camera_platform_remove, | |
207 | }; | |
208 | ||
209 | static int __init soc_camera_platform_module_init(void) | |
210 | { | |
211 | return platform_driver_register(&soc_camera_platform_driver); | |
212 | } | |
213 | ||
214 | static void __exit soc_camera_platform_module_exit(void) | |
215 | { | |
01c1e4ca | 216 | platform_driver_unregister(&soc_camera_platform_driver); |
326c9862 MD |
217 | } |
218 | ||
219 | module_init(soc_camera_platform_module_init); | |
220 | module_exit(soc_camera_platform_module_exit); | |
221 | ||
222 | MODULE_DESCRIPTION("SoC Camera Platform driver"); | |
223 | MODULE_AUTHOR("Magnus Damm"); | |
224 | MODULE_LICENSE("GPL v2"); | |
40e2e092 | 225 | MODULE_ALIAS("platform:soc_camera_platform"); |