blob: c11a080b06ad449f9cb20dbadc649353a33ba488 [file] [log] [blame]
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001/*
2 * camera image capture (abstract) bus driver
3 *
4 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
5 *
6 * This driver provides an interface between platform-specific camera
7 * busses and camera devices. It should be used if the camera is
8 * connected not over a "proper" bus like PCI or USB, but over a
9 * special bus, like, for example, the Quick Capture interface on PXA270
10 * SoCs. Later it should also be used for i.MX31 SoCs from Freescale.
11 * It can handle multiple cameras and / or multiple busses, which can
12 * be used, e.g., in stereo-vision applications.
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation.
17 */
18
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -030019#include <linux/device.h>
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -030020#include <linux/err.h>
Guennadi Liakhovetski0fd327b2009-05-07 13:25:32 -030021#include <linux/i2c.h>
22#include <linux/init.h>
23#include <linux/list.h>
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -030024#include <linux/mutex.h>
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -030025#include <linux/module.h>
Guennadi Liakhovetski0fd327b2009-05-07 13:25:32 -030026#include <linux/platform_device.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090027#include <linux/slab.h>
Mauro Carvalho Chehab4f9fb5e2010-05-18 00:46:09 -030028#include <linux/pm_runtime.h>
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -030029#include <linux/vmalloc.h>
30
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -030031#include <media/soc_camera.h>
Guennadi Liakhovetski0fd327b2009-05-07 13:25:32 -030032#include <media/v4l2-common.h>
Guennadi Liakhovetski0fd327b2009-05-07 13:25:32 -030033#include <media/v4l2-ioctl.h>
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -030034#include <media/v4l2-dev.h>
Guennadi Liakhovetski0fd327b2009-05-07 13:25:32 -030035#include <media/videobuf-core.h>
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -030036#include <media/soc_mediabus.h>
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -030037
Guennadi Liakhovetskidf2ed072009-03-13 06:08:20 -030038/* Default to VGA resolution */
39#define DEFAULT_WIDTH 640
40#define DEFAULT_HEIGHT 480
41
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -030042static LIST_HEAD(hosts);
43static LIST_HEAD(devices);
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -030044static DEFINE_MUTEX(list_lock); /* Protects the list of hosts */
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -030045
Guennadi Liakhovetskic2786ad2008-12-01 09:45:27 -030046const struct soc_camera_format_xlate *soc_camera_xlate_by_fourcc(
47 struct soc_camera_device *icd, unsigned int fourcc)
48{
49 unsigned int i;
50
51 for (i = 0; i < icd->num_user_formats; i++)
52 if (icd->user_formats[i].host_fmt->fourcc == fourcc)
53 return icd->user_formats + i;
54 return NULL;
55}
56EXPORT_SYMBOL(soc_camera_xlate_by_fourcc);
57
Guennadi Liakhovetskibd73b362008-12-23 05:54:45 -030058/**
59 * soc_camera_apply_sensor_flags() - apply platform SOCAM_SENSOR_INVERT_* flags
60 * @icl: camera platform parameters
61 * @flags: flags to be inverted according to platform configuration
62 * @return: resulting flags
63 */
64unsigned long soc_camera_apply_sensor_flags(struct soc_camera_link *icl,
65 unsigned long flags)
66{
67 unsigned long f;
68
69 /* If only one of the two polarities is supported, switch to the opposite */
70 if (icl->flags & SOCAM_SENSOR_INVERT_HSYNC) {
71 f = flags & (SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW);
72 if (f == SOCAM_HSYNC_ACTIVE_HIGH || f == SOCAM_HSYNC_ACTIVE_LOW)
73 flags ^= SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW;
74 }
75
76 if (icl->flags & SOCAM_SENSOR_INVERT_VSYNC) {
77 f = flags & (SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW);
78 if (f == SOCAM_VSYNC_ACTIVE_HIGH || f == SOCAM_VSYNC_ACTIVE_LOW)
79 flags ^= SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW;
80 }
81
82 if (icl->flags & SOCAM_SENSOR_INVERT_PCLK) {
83 f = flags & (SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING);
84 if (f == SOCAM_PCLK_SAMPLE_RISING || f == SOCAM_PCLK_SAMPLE_FALLING)
85 flags ^= SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING;
86 }
87
88 return flags;
89}
90EXPORT_SYMBOL(soc_camera_apply_sensor_flags);
91
Hans Verkuil72937892008-06-01 10:35:18 -030092static int soc_camera_try_fmt_vid_cap(struct file *file, void *priv,
Guennadi Liakhovetskiabe4c472008-12-01 09:44:56 -030093 struct v4l2_format *f)
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -030094{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -030095 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetski64f59052008-12-18 11:51:55 -030096 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -030097
98 WARN_ON(priv != file->private_data);
99
Guennadi Liakhovetskiad5f2e82008-03-07 21:57:18 -0300100 /* limit format to hardware capabilities */
Guennadi Liakhovetski06daa1a2008-12-18 12:52:08 -0300101 return ici->ops->try_fmt(icd, f);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300102}
103
104static int soc_camera_enum_input(struct file *file, void *priv,
105 struct v4l2_input *inp)
106{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300107 struct soc_camera_device *icd = file->private_data;
Kuninori Morimoto34d359d2008-12-18 12:47:46 -0300108 int ret = 0;
109
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300110 if (inp->index != 0)
111 return -EINVAL;
112
Kuninori Morimoto34d359d2008-12-18 12:47:46 -0300113 if (icd->ops->enum_input)
114 ret = icd->ops->enum_input(icd, inp);
115 else {
116 /* default is camera */
117 inp->type = V4L2_INPUT_TYPE_CAMERA;
118 inp->std = V4L2_STD_UNKNOWN;
119 strcpy(inp->name, "Camera");
120 }
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300121
Kuninori Morimoto34d359d2008-12-18 12:47:46 -0300122 return ret;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300123}
124
125static int soc_camera_g_input(struct file *file, void *priv, unsigned int *i)
126{
127 *i = 0;
128
129 return 0;
130}
131
132static int soc_camera_s_input(struct file *file, void *priv, unsigned int i)
133{
134 if (i > 0)
135 return -EINVAL;
136
137 return 0;
138}
139
140static int soc_camera_s_std(struct file *file, void *priv, v4l2_std_id *a)
141{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300142 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetskic9c1f1c2009-08-25 11:46:59 -0300143 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
Kuninori Morimoto513791a2008-12-18 12:46:45 -0300144
Guennadi Liakhovetskic9c1f1c2009-08-25 11:46:59 -0300145 return v4l2_subdev_call(sd, core, s_std, *a);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300146}
147
148static int soc_camera_reqbufs(struct file *file, void *priv,
149 struct v4l2_requestbuffers *p)
150{
151 int ret;
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300152 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetski64f59052008-12-18 11:51:55 -0300153 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300154
155 WARN_ON(priv != file->private_data);
156
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300157 if (icd->streamer && icd->streamer != file)
158 return -EBUSY;
159
160 ret = videobuf_reqbufs(&icd->vb_vidq, p);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300161 if (ret < 0)
162 return ret;
163
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300164 ret = ici->ops->reqbufs(icd, p);
165 if (!ret && !icd->streamer)
166 icd->streamer = file;
167
168 return ret;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300169}
170
171static int soc_camera_querybuf(struct file *file, void *priv,
172 struct v4l2_buffer *p)
173{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300174 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300175
176 WARN_ON(priv != file->private_data);
177
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300178 return videobuf_querybuf(&icd->vb_vidq, p);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300179}
180
181static int soc_camera_qbuf(struct file *file, void *priv,
182 struct v4l2_buffer *p)
183{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300184 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300185
186 WARN_ON(priv != file->private_data);
187
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300188 if (icd->streamer != file)
189 return -EBUSY;
190
191 return videobuf_qbuf(&icd->vb_vidq, p);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300192}
193
194static int soc_camera_dqbuf(struct file *file, void *priv,
195 struct v4l2_buffer *p)
196{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300197 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300198
199 WARN_ON(priv != file->private_data);
200
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300201 if (icd->streamer != file)
202 return -EBUSY;
203
204 return videobuf_dqbuf(&icd->vb_vidq, p, file->f_flags & O_NONBLOCK);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300205}
206
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300207/* Always entered with .video_lock held */
Guennadi Liakhovetskic2786ad2008-12-01 09:45:27 -0300208static int soc_camera_init_user_formats(struct soc_camera_device *icd)
209{
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -0300210 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
Guennadi Liakhovetskic2786ad2008-12-01 09:45:27 -0300211 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
Hans Verkuil3805f202010-05-08 17:55:00 -0300212 unsigned int i, fmts = 0, raw_fmts = 0;
213 int ret;
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -0300214 enum v4l2_mbus_pixelcode code;
215
216 while (!v4l2_subdev_call(sd, video, enum_mbus_fmt, raw_fmts, &code))
217 raw_fmts++;
Guennadi Liakhovetskic2786ad2008-12-01 09:45:27 -0300218
219 if (!ici->ops->get_formats)
220 /*
221 * Fallback mode - the host will have to serve all
222 * sensor-provided formats one-to-one to the user
223 */
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -0300224 fmts = raw_fmts;
Guennadi Liakhovetskic2786ad2008-12-01 09:45:27 -0300225 else
226 /*
227 * First pass - only count formats this host-sensor
228 * configuration can provide
229 */
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -0300230 for (i = 0; i < raw_fmts; i++) {
Guennadi Liakhovetskifa489842009-08-25 11:46:43 -0300231 ret = ici->ops->get_formats(icd, i, NULL);
232 if (ret < 0)
233 return ret;
234 fmts += ret;
235 }
Guennadi Liakhovetskic2786ad2008-12-01 09:45:27 -0300236
237 if (!fmts)
238 return -ENXIO;
239
240 icd->user_formats =
241 vmalloc(fmts * sizeof(struct soc_camera_format_xlate));
242 if (!icd->user_formats)
243 return -ENOMEM;
244
245 icd->num_user_formats = fmts;
Guennadi Liakhovetskic2786ad2008-12-01 09:45:27 -0300246
247 dev_dbg(&icd->dev, "Found %d supported formats.\n", fmts);
248
249 /* Second pass - actually fill data formats */
Stefan Herbrechtsmeier14df2cc2009-06-24 10:31:25 -0300250 fmts = 0;
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -0300251 for (i = 0; i < raw_fmts; i++)
Guennadi Liakhovetskic2786ad2008-12-01 09:45:27 -0300252 if (!ici->ops->get_formats) {
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -0300253 v4l2_subdev_call(sd, video, enum_mbus_fmt, i, &code);
254 icd->user_formats[i].host_fmt =
255 soc_mbus_get_fmtdesc(code);
256 icd->user_formats[i].code = code;
Guennadi Liakhovetskic2786ad2008-12-01 09:45:27 -0300257 } else {
Guennadi Liakhovetskifa489842009-08-25 11:46:43 -0300258 ret = ici->ops->get_formats(icd, i,
259 &icd->user_formats[fmts]);
260 if (ret < 0)
261 goto egfmt;
262 fmts += ret;
Guennadi Liakhovetskic2786ad2008-12-01 09:45:27 -0300263 }
264
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -0300265 icd->current_fmt = &icd->user_formats[0];
Guennadi Liakhovetskic2786ad2008-12-01 09:45:27 -0300266
267 return 0;
Guennadi Liakhovetskifa489842009-08-25 11:46:43 -0300268
269egfmt:
270 icd->num_user_formats = 0;
271 vfree(icd->user_formats);
272 return ret;
Guennadi Liakhovetskic2786ad2008-12-01 09:45:27 -0300273}
274
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300275/* Always entered with .video_lock held */
Guennadi Liakhovetskic2786ad2008-12-01 09:45:27 -0300276static void soc_camera_free_user_formats(struct soc_camera_device *icd)
277{
Guennadi Liakhovetskifa489842009-08-25 11:46:43 -0300278 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
279
280 if (ici->ops->put_formats)
281 ici->ops->put_formats(icd);
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300282 icd->current_fmt = NULL;
Guennadi Liakhovetskifa489842009-08-25 11:46:43 -0300283 icd->num_user_formats = 0;
Guennadi Liakhovetskic2786ad2008-12-01 09:45:27 -0300284 vfree(icd->user_formats);
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300285 icd->user_formats = NULL;
Guennadi Liakhovetskic2786ad2008-12-01 09:45:27 -0300286}
287
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -0300288#define pixfmtstr(x) (x) & 0xff, ((x) >> 8) & 0xff, ((x) >> 16) & 0xff, \
289 ((x) >> 24) & 0xff
290
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -0300291/* Called with .vb_lock held, or from the first open(2), see comment there */
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300292static int soc_camera_set_fmt(struct soc_camera_device *icd,
Guennadi Liakhovetskidf2ed072009-03-13 06:08:20 -0300293 struct v4l2_format *f)
294{
Guennadi Liakhovetskidf2ed072009-03-13 06:08:20 -0300295 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
296 struct v4l2_pix_format *pix = &f->fmt.pix;
297 int ret;
298
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -0300299 dev_dbg(&icd->dev, "S_FMT(%c%c%c%c, %ux%u)\n",
300 pixfmtstr(pix->pixelformat), pix->width, pix->height);
301
Guennadi Liakhovetskidf2ed072009-03-13 06:08:20 -0300302 /* We always call try_fmt() before set_fmt() or set_crop() */
303 ret = ici->ops->try_fmt(icd, f);
304 if (ret < 0)
305 return ret;
306
307 ret = ici->ops->set_fmt(icd, f);
308 if (ret < 0) {
309 return ret;
310 } else if (!icd->current_fmt ||
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -0300311 icd->current_fmt->host_fmt->fourcc != pix->pixelformat) {
Guennadi Liakhovetski2aa58db2009-08-25 11:47:00 -0300312 dev_err(&icd->dev,
Guennadi Liakhovetskidf2ed072009-03-13 06:08:20 -0300313 "Host driver hasn't set up current format correctly!\n");
314 return -EINVAL;
315 }
316
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -0300317 icd->user_width = pix->width;
318 icd->user_height = pix->height;
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -0300319 icd->colorspace = pix->colorspace;
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300320 icd->vb_vidq.field =
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -0300321 icd->field = pix->field;
Guennadi Liakhovetski025c18a2009-03-13 06:08:20 -0300322
Guennadi Liakhovetskidf2ed072009-03-13 06:08:20 -0300323 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
324 dev_warn(&icd->dev, "Attention! Wrong buf-type %d\n",
325 f->type);
326
327 dev_dbg(&icd->dev, "set width: %d height: %d\n",
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -0300328 icd->user_width, icd->user_height);
Guennadi Liakhovetskidf2ed072009-03-13 06:08:20 -0300329
330 /* set physical bus parameters */
331 return ici->ops->set_bus_param(icd, pix->pixelformat);
332}
333
Hans Verkuilbec43662008-12-30 06:58:20 -0300334static int soc_camera_open(struct file *file)
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300335{
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300336 struct video_device *vdev = video_devdata(file);
Guennadi Liakhovetski96c75392009-08-25 11:53:23 -0300337 struct soc_camera_device *icd = container_of(vdev->parent,
338 struct soc_camera_device,
339 dev);
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300340 struct soc_camera_link *icl = to_soc_camera_link(icd);
Guennadi Liakhovetski9dc4e482008-04-22 14:45:32 -0300341 struct soc_camera_host *ici;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300342 int ret;
343
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300344 if (!icd->ops)
345 /* No device driver attached */
346 return -ENODEV;
347
Guennadi Liakhovetski9dc4e482008-04-22 14:45:32 -0300348 ici = to_soc_camera_host(icd->dev.parent);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300349
Guennadi Liakhovetskib8d99042008-04-04 13:41:25 -0300350 if (!try_module_get(ici->ops->owner)) {
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300351 dev_err(&icd->dev, "Couldn't lock capture bus driver.\n");
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300352 return -EINVAL;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300353 }
354
Guennadi Liakhovetski96c75392009-08-25 11:53:23 -0300355 /*
356 * Protect against icd->ops->remove() until we module_get() both
357 * drivers.
358 */
Guennadi Liakhovetski1c3bb742008-12-18 12:28:54 -0300359 mutex_lock(&icd->video_lock);
360
Guennadi Liakhovetski1a0063a2008-04-04 13:46:34 -0300361 icd->use_count++;
362
Guennadi Liakhovetski9dc4e482008-04-22 14:45:32 -0300363 /* Now we really have to activate the camera */
364 if (icd->use_count == 1) {
Guennadi Liakhovetski025c18a2009-03-13 06:08:20 -0300365 /* Restore parameters before the last close() per V4L2 API */
Guennadi Liakhovetskidf2ed072009-03-13 06:08:20 -0300366 struct v4l2_format f = {
367 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
368 .fmt.pix = {
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -0300369 .width = icd->user_width,
370 .height = icd->user_height,
Guennadi Liakhovetski025c18a2009-03-13 06:08:20 -0300371 .field = icd->field,
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -0300372 .colorspace = icd->colorspace,
373 .pixelformat =
374 icd->current_fmt->host_fmt->fourcc,
Guennadi Liakhovetskidf2ed072009-03-13 06:08:20 -0300375 },
376 };
377
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300378 if (icl->power) {
379 ret = icl->power(icd->pdev, 1);
380 if (ret < 0)
381 goto epower;
382 }
383
384 /* The camera could have been already on, try to reset */
385 if (icl->reset)
386 icl->reset(icd->pdev);
387
Guennadi Liakhovetskib8d99042008-04-04 13:41:25 -0300388 ret = ici->ops->add(icd);
Guennadi Liakhovetski9dc4e482008-04-22 14:45:32 -0300389 if (ret < 0) {
390 dev_err(&icd->dev, "Couldn't activate the camera: %d\n", ret);
Guennadi Liakhovetski9dc4e482008-04-22 14:45:32 -0300391 goto eiciadd;
392 }
Guennadi Liakhovetskidf2ed072009-03-13 06:08:20 -0300393
Mauro Carvalho Chehab4f9fb5e2010-05-18 00:46:09 -0300394 pm_runtime_enable(&icd->vdev->dev);
395 ret = pm_runtime_resume(&icd->vdev->dev);
396 if (ret < 0 && ret != -ENOSYS)
397 goto eresume;
398
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -0300399 /*
400 * Try to configure with default parameters. Notice: this is the
401 * very first open, so, we cannot race against other calls,
402 * apart from someone else calling open() simultaneously, but
403 * .video_lock is protecting us against it.
404 */
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300405 ret = soc_camera_set_fmt(icd, &f);
Guennadi Liakhovetskidf2ed072009-03-13 06:08:20 -0300406 if (ret < 0)
407 goto esfmt;
Guennadi Liakhovetski9dc4e482008-04-22 14:45:32 -0300408 }
409
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300410 file->private_data = icd;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300411 dev_dbg(&icd->dev, "camera device open\n");
412
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300413 ici->ops->init_videobuf(&icd->vb_vidq, icd);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300414
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300415 mutex_unlock(&icd->video_lock);
416
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300417 return 0;
418
Guennadi Liakhovetskidf2ed072009-03-13 06:08:20 -0300419 /*
Mauro Carvalho Chehab4f9fb5e2010-05-18 00:46:09 -0300420 * First four errors are entered with the .video_lock held
Guennadi Liakhovetskidf2ed072009-03-13 06:08:20 -0300421 * and use_count == 1
422 */
423esfmt:
Mauro Carvalho Chehab4f9fb5e2010-05-18 00:46:09 -0300424 pm_runtime_disable(&icd->vdev->dev);
425eresume:
Guennadi Liakhovetskidf2ed072009-03-13 06:08:20 -0300426 ici->ops->remove(icd);
Guennadi Liakhovetski9dc4e482008-04-22 14:45:32 -0300427eiciadd:
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300428 if (icl->power)
429 icl->power(icd->pdev, 0);
430epower:
Guennadi Liakhovetskic2786ad2008-12-01 09:45:27 -0300431 icd->use_count--;
Guennadi Liakhovetski1c3bb742008-12-18 12:28:54 -0300432 mutex_unlock(&icd->video_lock);
Guennadi Liakhovetskib8d99042008-04-04 13:41:25 -0300433 module_put(ici->ops->owner);
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300434
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300435 return ret;
436}
437
Hans Verkuilbec43662008-12-30 06:58:20 -0300438static int soc_camera_close(struct file *file)
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300439{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300440 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300441 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300442
Guennadi Liakhovetski1c3bb742008-12-18 12:28:54 -0300443 mutex_lock(&icd->video_lock);
Guennadi Liakhovetski9dc4e482008-04-22 14:45:32 -0300444 icd->use_count--;
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300445 if (!icd->use_count) {
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300446 struct soc_camera_link *icl = to_soc_camera_link(icd);
447
Mauro Carvalho Chehab4f9fb5e2010-05-18 00:46:09 -0300448 pm_runtime_suspend(&icd->vdev->dev);
449 pm_runtime_disable(&icd->vdev->dev);
450
Guennadi Liakhovetskib8d99042008-04-04 13:41:25 -0300451 ici->ops->remove(icd);
Mauro Carvalho Chehab4f9fb5e2010-05-18 00:46:09 -0300452
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300453 if (icl->power)
454 icl->power(icd->pdev, 0);
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300455 }
Guennadi Liakhovetski025c18a2009-03-13 06:08:20 -0300456
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300457 if (icd->streamer == file)
458 icd->streamer = NULL;
459
Guennadi Liakhovetski1c3bb742008-12-18 12:28:54 -0300460 mutex_unlock(&icd->video_lock);
461
Guennadi Liakhovetskib8d99042008-04-04 13:41:25 -0300462 module_put(ici->ops->owner);
Guennadi Liakhovetski9dc4e482008-04-22 14:45:32 -0300463
Guennadi Liakhovetski2aa58db2009-08-25 11:47:00 -0300464 dev_dbg(&icd->dev, "camera device close\n");
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300465
466 return 0;
467}
468
Andrew Mortonaba360d2008-04-22 14:45:59 -0300469static ssize_t soc_camera_read(struct file *file, char __user *buf,
Guennadi Liakhovetskiabe4c472008-12-01 09:44:56 -0300470 size_t count, loff_t *ppos)
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300471{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300472 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300473 int err = -EINVAL;
474
Guennadi Liakhovetski2aa58db2009-08-25 11:47:00 -0300475 dev_err(&icd->dev, "camera device read not implemented\n");
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300476
477 return err;
478}
479
480static int soc_camera_mmap(struct file *file, struct vm_area_struct *vma)
481{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300482 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300483 int err;
484
485 dev_dbg(&icd->dev, "mmap called, vma=0x%08lx\n", (unsigned long)vma);
486
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300487 if (icd->streamer != file)
488 return -EBUSY;
489
490 err = videobuf_mmap_mapper(&icd->vb_vidq, vma);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300491
492 dev_dbg(&icd->dev, "vma start=0x%08lx, size=%ld, ret=%d\n",
493 (unsigned long)vma->vm_start,
494 (unsigned long)vma->vm_end - (unsigned long)vma->vm_start,
495 err);
496
497 return err;
498}
499
500static unsigned int soc_camera_poll(struct file *file, poll_table *pt)
501{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300502 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetski64f59052008-12-18 11:51:55 -0300503 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300504
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300505 if (icd->streamer != file)
506 return -EBUSY;
507
508 if (list_empty(&icd->vb_vidq.stream)) {
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300509 dev_err(&icd->dev, "Trying to poll with no queued buffers!\n");
510 return POLLERR;
511 }
512
Guennadi Liakhovetskib8d99042008-04-04 13:41:25 -0300513 return ici->ops->poll(file, pt);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300514}
515
Hans Verkuilbec43662008-12-30 06:58:20 -0300516static struct v4l2_file_operations soc_camera_fops = {
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300517 .owner = THIS_MODULE,
518 .open = soc_camera_open,
519 .release = soc_camera_close,
520 .ioctl = video_ioctl2,
521 .read = soc_camera_read,
522 .mmap = soc_camera_mmap,
523 .poll = soc_camera_poll,
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300524};
525
Hans Verkuil72937892008-06-01 10:35:18 -0300526static int soc_camera_s_fmt_vid_cap(struct file *file, void *priv,
Guennadi Liakhovetskiabe4c472008-12-01 09:44:56 -0300527 struct v4l2_format *f)
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300528{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300529 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300530 int ret;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300531
532 WARN_ON(priv != file->private_data);
533
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300534 if (icd->streamer && icd->streamer != file)
535 return -EBUSY;
Guennadi Liakhovetski1c3bb742008-12-18 12:28:54 -0300536
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300537 mutex_lock(&icd->vb_vidq.vb_lock);
538
539 if (icd->vb_vidq.bufs[0]) {
Guennadi Liakhovetskib897a912009-08-25 11:46:53 -0300540 dev_err(&icd->dev, "S_FMT denied: queue initialised\n");
Guennadi Liakhovetski1c3bb742008-12-18 12:28:54 -0300541 ret = -EBUSY;
542 goto unlock;
543 }
544
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300545 ret = soc_camera_set_fmt(icd, f);
546
547 if (!ret && !icd->streamer)
548 icd->streamer = file;
Guennadi Liakhovetski1c3bb742008-12-18 12:28:54 -0300549
550unlock:
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300551 mutex_unlock(&icd->vb_vidq.vb_lock);
Guennadi Liakhovetski1c3bb742008-12-18 12:28:54 -0300552
553 return ret;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300554}
555
Hans Verkuil72937892008-06-01 10:35:18 -0300556static int soc_camera_enum_fmt_vid_cap(struct file *file, void *priv,
Guennadi Liakhovetskiabe4c472008-12-01 09:44:56 -0300557 struct v4l2_fmtdesc *f)
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300558{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300559 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -0300560 const struct soc_mbus_pixelfmt *format;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300561
562 WARN_ON(priv != file->private_data);
563
Guennadi Liakhovetskic2786ad2008-12-01 09:45:27 -0300564 if (f->index >= icd->num_user_formats)
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300565 return -EINVAL;
566
Guennadi Liakhovetskic2786ad2008-12-01 09:45:27 -0300567 format = icd->user_formats[f->index].host_fmt;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300568
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -0300569 if (format->name)
570 strlcpy(f->description, format->name, sizeof(f->description));
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300571 f->pixelformat = format->fourcc;
572 return 0;
573}
574
Hans Verkuil72937892008-06-01 10:35:18 -0300575static int soc_camera_g_fmt_vid_cap(struct file *file, void *priv,
Guennadi Liakhovetskiabe4c472008-12-01 09:44:56 -0300576 struct v4l2_format *f)
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300577{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300578 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetski64f59052008-12-18 11:51:55 -0300579 struct v4l2_pix_format *pix = &f->fmt.pix;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300580
581 WARN_ON(priv != file->private_data);
582
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -0300583 pix->width = icd->user_width;
584 pix->height = icd->user_height;
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300585 pix->field = icd->vb_vidq.field;
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -0300586 pix->pixelformat = icd->current_fmt->host_fmt->fourcc;
587 pix->bytesperline = soc_mbus_bytes_per_line(pix->width,
588 icd->current_fmt->host_fmt);
589 pix->colorspace = icd->colorspace;
590 if (pix->bytesperline < 0)
591 return pix->bytesperline;
Guennadi Liakhovetski64f59052008-12-18 11:51:55 -0300592 pix->sizeimage = pix->height * pix->bytesperline;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300593 dev_dbg(&icd->dev, "current_fmt->fourcc: 0x%08x\n",
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -0300594 icd->current_fmt->host_fmt->fourcc);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300595 return 0;
596}
597
598static int soc_camera_querycap(struct file *file, void *priv,
599 struct v4l2_capability *cap)
600{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300601 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetski64f59052008-12-18 11:51:55 -0300602 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300603
604 WARN_ON(priv != file->private_data);
605
606 strlcpy(cap->driver, ici->drv_name, sizeof(cap->driver));
Guennadi Liakhovetskib8d99042008-04-04 13:41:25 -0300607 return ici->ops->querycap(ici, cap);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300608}
609
610static int soc_camera_streamon(struct file *file, void *priv,
611 enum v4l2_buf_type i)
612{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300613 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetskic9c1f1c2009-08-25 11:46:59 -0300614 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
Guennadi Liakhovetski1c3bb742008-12-18 12:28:54 -0300615 int ret;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300616
617 WARN_ON(priv != file->private_data);
618
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300619 if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE)
620 return -EINVAL;
621
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300622 if (icd->streamer != file)
623 return -EBUSY;
624
Guennadi Liakhovetski1c3bb742008-12-18 12:28:54 -0300625 mutex_lock(&icd->video_lock);
626
Guennadi Liakhovetskic9c1f1c2009-08-25 11:46:59 -0300627 v4l2_subdev_call(sd, video, s_stream, 1);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300628
629 /* This calls buf_queue from host driver's videobuf_queue_ops */
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300630 ret = videobuf_streamon(&icd->vb_vidq);
Guennadi Liakhovetski1c3bb742008-12-18 12:28:54 -0300631
632 mutex_unlock(&icd->video_lock);
633
634 return ret;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300635}
636
637static int soc_camera_streamoff(struct file *file, void *priv,
638 enum v4l2_buf_type i)
639{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300640 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetskic9c1f1c2009-08-25 11:46:59 -0300641 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300642
643 WARN_ON(priv != file->private_data);
644
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300645 if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE)
646 return -EINVAL;
647
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300648 if (icd->streamer != file)
649 return -EBUSY;
650
Guennadi Liakhovetski1c3bb742008-12-18 12:28:54 -0300651 mutex_lock(&icd->video_lock);
652
Guennadi Liakhovetski5d28d522009-12-11 11:15:05 -0300653 /*
654 * This calls buf_release from host driver's videobuf_queue_ops for all
655 * remaining buffers. When the last buffer is freed, stop capture
656 */
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300657 videobuf_streamoff(&icd->vb_vidq);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300658
Guennadi Liakhovetskic9c1f1c2009-08-25 11:46:59 -0300659 v4l2_subdev_call(sd, video, s_stream, 0);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300660
Guennadi Liakhovetski1c3bb742008-12-18 12:28:54 -0300661 mutex_unlock(&icd->video_lock);
662
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300663 return 0;
664}
665
666static int soc_camera_queryctrl(struct file *file, void *priv,
667 struct v4l2_queryctrl *qc)
668{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300669 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetski2840d242009-08-25 11:44:15 -0300670 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300671 int i;
672
673 WARN_ON(priv != file->private_data);
674
675 if (!qc->id)
676 return -EINVAL;
677
Guennadi Liakhovetski2840d242009-08-25 11:44:15 -0300678 /* First check host controls */
679 for (i = 0; i < ici->ops->num_controls; i++)
680 if (qc->id == ici->ops->controls[i].id) {
681 memcpy(qc, &(ici->ops->controls[i]),
682 sizeof(*qc));
683 return 0;
684 }
685
686 /* Then device controls */
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300687 for (i = 0; i < icd->ops->num_controls; i++)
688 if (qc->id == icd->ops->controls[i].id) {
689 memcpy(qc, &(icd->ops->controls[i]),
690 sizeof(*qc));
691 return 0;
692 }
693
694 return -EINVAL;
695}
696
697static int soc_camera_g_ctrl(struct file *file, void *priv,
698 struct v4l2_control *ctrl)
699{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300700 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300701 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
Guennadi Liakhovetskic9c1f1c2009-08-25 11:46:59 -0300702 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
Guennadi Liakhovetski2840d242009-08-25 11:44:15 -0300703 int ret;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300704
705 WARN_ON(priv != file->private_data);
706
Guennadi Liakhovetski2840d242009-08-25 11:44:15 -0300707 if (ici->ops->get_ctrl) {
708 ret = ici->ops->get_ctrl(icd, ctrl);
709 if (ret != -ENOIOCTLCMD)
710 return ret;
711 }
712
Guennadi Liakhovetskic9c1f1c2009-08-25 11:46:59 -0300713 return v4l2_subdev_call(sd, core, g_ctrl, ctrl);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300714}
715
716static int soc_camera_s_ctrl(struct file *file, void *priv,
717 struct v4l2_control *ctrl)
718{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300719 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300720 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
Guennadi Liakhovetskic9c1f1c2009-08-25 11:46:59 -0300721 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
Guennadi Liakhovetski2840d242009-08-25 11:44:15 -0300722 int ret;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300723
724 WARN_ON(priv != file->private_data);
725
Guennadi Liakhovetski2840d242009-08-25 11:44:15 -0300726 if (ici->ops->set_ctrl) {
727 ret = ici->ops->set_ctrl(icd, ctrl);
728 if (ret != -ENOIOCTLCMD)
729 return ret;
730 }
731
Guennadi Liakhovetskic9c1f1c2009-08-25 11:46:59 -0300732 return v4l2_subdev_call(sd, core, s_ctrl, ctrl);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300733}
734
735static int soc_camera_cropcap(struct file *file, void *fh,
736 struct v4l2_cropcap *a)
737{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300738 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -0300739 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300740
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -0300741 return ici->ops->cropcap(icd, a);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300742}
743
744static int soc_camera_g_crop(struct file *file, void *fh,
745 struct v4l2_crop *a)
746{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300747 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -0300748 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
749 int ret;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300750
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300751 mutex_lock(&icd->vb_vidq.vb_lock);
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -0300752 ret = ici->ops->get_crop(icd, a);
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300753 mutex_unlock(&icd->vb_vidq.vb_lock);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300754
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -0300755 return ret;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300756}
757
Guennadi Liakhovetski68a54f02009-08-25 11:46:52 -0300758/*
759 * According to the V4L2 API, drivers shall not update the struct v4l2_crop
760 * argument with the actual geometry, instead, the user shall use G_CROP to
Guennadi Liakhovetskiab56d5e2010-03-23 11:31:46 -0300761 * retrieve it.
Guennadi Liakhovetski68a54f02009-08-25 11:46:52 -0300762 */
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300763static int soc_camera_s_crop(struct file *file, void *fh,
764 struct v4l2_crop *a)
765{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300766 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetski64f59052008-12-18 11:51:55 -0300767 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -0300768 struct v4l2_rect *rect = &a->c;
769 struct v4l2_crop current_crop;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300770 int ret;
771
772 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
773 return -EINVAL;
774
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -0300775 dev_dbg(&icd->dev, "S_CROP(%ux%u@%u:%u)\n",
776 rect->width, rect->height, rect->left, rect->top);
777
Guennadi Liakhovetski1c3bb742008-12-18 12:28:54 -0300778 /* Cropping is allowed during a running capture, guard consistency */
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300779 mutex_lock(&icd->vb_vidq.vb_lock);
Guennadi Liakhovetski1c3bb742008-12-18 12:28:54 -0300780
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -0300781 /* If get_crop fails, we'll let host and / or client drivers decide */
782 ret = ici->ops->get_crop(icd, &current_crop);
783
Guennadi Liakhovetskib897a912009-08-25 11:46:53 -0300784 /* Prohibit window size change with initialised buffers */
Guennadi Liakhovetski103754a2010-08-05 19:23:44 -0300785 if (ret < 0) {
786 dev_err(&icd->dev,
787 "S_CROP denied: getting current crop failed\n");
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300788 } else if (icd->vb_vidq.bufs[0] &&
Guennadi Liakhovetski103754a2010-08-05 19:23:44 -0300789 (a->c.width != current_crop.c.width ||
790 a->c.height != current_crop.c.height)) {
Guennadi Liakhovetskib897a912009-08-25 11:46:53 -0300791 dev_err(&icd->dev,
792 "S_CROP denied: queue initialised and sizes differ\n");
793 ret = -EBUSY;
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -0300794 } else {
795 ret = ici->ops->set_crop(icd, a);
Guennadi Liakhovetskib897a912009-08-25 11:46:53 -0300796 }
797
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300798 mutex_unlock(&icd->vb_vidq.vb_lock);
Guennadi Liakhovetski1c3bb742008-12-18 12:28:54 -0300799
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300800 return ret;
801}
802
Guennadi Liakhovetskic9f6ef62010-02-09 18:00:30 +0100803static int soc_camera_g_parm(struct file *file, void *fh,
804 struct v4l2_streamparm *a)
805{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300806 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetskic9f6ef62010-02-09 18:00:30 +0100807 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
808
809 if (ici->ops->get_parm)
810 return ici->ops->get_parm(icd, a);
811
812 return -ENOIOCTLCMD;
813}
814
815static int soc_camera_s_parm(struct file *file, void *fh,
816 struct v4l2_streamparm *a)
817{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300818 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetskic9f6ef62010-02-09 18:00:30 +0100819 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
820
821 if (ici->ops->set_parm)
822 return ici->ops->set_parm(icd, a);
823
824 return -ENOIOCTLCMD;
825}
826
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300827static int soc_camera_g_chip_ident(struct file *file, void *fh,
Hans Verkuilaecde8b52008-12-30 07:14:19 -0300828 struct v4l2_dbg_chip_ident *id)
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300829{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300830 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetskic9c1f1c2009-08-25 11:46:59 -0300831 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300832
Guennadi Liakhovetskic9c1f1c2009-08-25 11:46:59 -0300833 return v4l2_subdev_call(sd, core, g_chip_ident, id);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300834}
835
836#ifdef CONFIG_VIDEO_ADV_DEBUG
837static int soc_camera_g_register(struct file *file, void *fh,
Hans Verkuilaecde8b52008-12-30 07:14:19 -0300838 struct v4l2_dbg_register *reg)
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300839{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300840 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetskic9c1f1c2009-08-25 11:46:59 -0300841 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300842
Guennadi Liakhovetskic9c1f1c2009-08-25 11:46:59 -0300843 return v4l2_subdev_call(sd, core, g_register, reg);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300844}
845
846static int soc_camera_s_register(struct file *file, void *fh,
Hans Verkuilaecde8b52008-12-30 07:14:19 -0300847 struct v4l2_dbg_register *reg)
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300848{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300849 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetskic9c1f1c2009-08-25 11:46:59 -0300850 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300851
Guennadi Liakhovetskic9c1f1c2009-08-25 11:46:59 -0300852 return v4l2_subdev_call(sd, core, s_register, reg);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300853}
854#endif
855
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300856/* So far this function cannot fail */
857static void scan_add_host(struct soc_camera_host *ici)
858{
859 struct soc_camera_device *icd;
860
861 mutex_lock(&list_lock);
862
863 list_for_each_entry(icd, &devices, list) {
864 if (icd->iface == ici->nr) {
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300865 int ret;
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300866 icd->dev.parent = ici->v4l2_dev.dev;
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300867 dev_set_name(&icd->dev, "%u-%u", icd->iface,
868 icd->devnum);
869 ret = device_register(&icd->dev);
870 if (ret < 0) {
871 icd->dev.parent = NULL;
872 dev_err(&icd->dev,
873 "Cannot register device: %d\n", ret);
874 }
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300875 }
876 }
877
878 mutex_unlock(&list_lock);
879}
880
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300881#ifdef CONFIG_I2C_BOARDINFO
882static int soc_camera_init_i2c(struct soc_camera_device *icd,
883 struct soc_camera_link *icl)
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300884{
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300885 struct i2c_client *client;
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300886 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300887 struct i2c_adapter *adap = i2c_get_adapter(icl->i2c_adapter_id);
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300888 struct v4l2_subdev *subdev;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300889
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300890 if (!adap) {
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300891 dev_err(&icd->dev, "Cannot get I2C adapter #%d. No driver?\n",
892 icl->i2c_adapter_id);
893 goto ei2cga;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300894 }
895
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300896 icl->board_info->platform_data = icd;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300897
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300898 subdev = v4l2_i2c_new_subdev_board(&ici->v4l2_dev, adap,
899 icl->module_name, icl->board_info, NULL);
Magnus Dammd74f8412010-02-09 17:40:40 +0900900 if (!subdev)
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300901 goto ei2cnd;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300902
Laurent Pinchartc4ce6d12010-07-30 17:24:54 -0300903 client = v4l2_get_subdevdata(subdev);
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300904
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300905 /* Use to_i2c_client(dev) to recover the i2c client */
906 dev_set_drvdata(&icd->dev, &client->dev);
907
908 return 0;
909ei2cnd:
910 i2c_put_adapter(adap);
911ei2cga:
Magnus Dammd74f8412010-02-09 17:40:40 +0900912 return -ENODEV;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300913}
914
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300915static void soc_camera_free_i2c(struct soc_camera_device *icd)
916{
917 struct i2c_client *client =
918 to_i2c_client(to_soc_camera_control(icd));
919 dev_set_drvdata(&icd->dev, NULL);
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300920 v4l2_device_unregister_subdev(i2c_get_clientdata(client));
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300921 i2c_unregister_device(client);
922 i2c_put_adapter(client->adapter);
923}
924#else
925#define soc_camera_init_i2c(icd, icl) (-ENODEV)
926#define soc_camera_free_i2c(icd) do {} while (0)
927#endif
928
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300929static int soc_camera_video_start(struct soc_camera_device *icd);
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300930static int video_dev_create(struct soc_camera_device *icd);
931/* Called during host-driver probe */
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300932static int soc_camera_probe(struct device *dev)
933{
934 struct soc_camera_device *icd = to_soc_camera_dev(dev);
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300935 struct soc_camera_host *ici = to_soc_camera_host(dev->parent);
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300936 struct soc_camera_link *icl = to_soc_camera_link(icd);
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300937 struct device *control = NULL;
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -0300938 struct v4l2_subdev *sd;
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -0300939 struct v4l2_mbus_framefmt mf;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300940 int ret;
941
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300942 dev_info(dev, "Probing %s\n", dev_name(dev));
Guennadi Liakhovetski1c3bb742008-12-18 12:28:54 -0300943
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300944 if (icl->power) {
945 ret = icl->power(icd->pdev, 1);
946 if (ret < 0) {
947 dev_err(dev,
948 "Platform failed to power-on the camera.\n");
949 goto epower;
950 }
951 }
952
953 /* The camera could have been already on, try to reset */
954 if (icl->reset)
955 icl->reset(icd->pdev);
956
957 ret = ici->ops->add(icd);
958 if (ret < 0)
959 goto eadd;
960
961 /* Must have icd->vdev before registering the device */
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300962 ret = video_dev_create(icd);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300963 if (ret < 0)
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300964 goto evdc;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300965
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300966 /* Non-i2c cameras, e.g., soc_camera_platform, have no board_info */
967 if (icl->board_info) {
968 ret = soc_camera_init_i2c(icd, icl);
969 if (ret < 0)
970 goto eadddev;
971 } else if (!icl->add_device || !icl->del_device) {
972 ret = -EINVAL;
973 goto eadddev;
974 } else {
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300975 if (icl->module_name)
976 ret = request_module(icl->module_name);
977
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300978 ret = icl->add_device(icl, &icd->dev);
979 if (ret < 0)
980 goto eadddev;
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300981
Guennadi Liakhovetski96c75392009-08-25 11:53:23 -0300982 /*
983 * FIXME: this is racy, have to use driver-binding notification,
984 * when it is available
985 */
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300986 control = to_soc_camera_control(icd);
Guennadi Liakhovetski08590b92009-08-25 11:46:54 -0300987 if (!control || !control->driver || !dev_get_drvdata(control) ||
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300988 !try_module_get(control->driver->owner)) {
989 icl->del_device(icl);
990 goto enodrv;
991 }
Guennadi Liakhovetski025c18a2009-03-13 06:08:20 -0300992 }
993
Guennadi Liakhovetskifa489842009-08-25 11:46:43 -0300994 /* At this point client .probe() should have run already */
995 ret = soc_camera_init_user_formats(icd);
996 if (ret < 0)
997 goto eiufmt;
998
Guennadi Liakhovetskifa489842009-08-25 11:46:43 -0300999 icd->field = V4L2_FIELD_ANY;
1000
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001001 /* ..._video_start() will create a device node, so we have to protect */
1002 mutex_lock(&icd->video_lock);
1003
1004 ret = soc_camera_video_start(icd);
1005 if (ret < 0)
1006 goto evidstart;
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001007
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -03001008 /* Try to improve our guess of a reasonable window format */
1009 sd = soc_camera_to_subdev(icd);
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -03001010 if (!v4l2_subdev_call(sd, video, g_mbus_fmt, &mf)) {
1011 icd->user_width = mf.width;
1012 icd->user_height = mf.height;
1013 icd->colorspace = mf.colorspace;
1014 icd->field = mf.field;
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -03001015 }
1016
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001017 /* Do we have to sysfs_remove_link() before device_unregister()? */
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -03001018 if (sysfs_create_link(&icd->dev.kobj, &to_soc_camera_control(icd)->kobj,
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001019 "control"))
1020 dev_warn(&icd->dev, "Failed creating the control symlink\n");
1021
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001022 ici->ops->remove(icd);
1023
1024 if (icl->power)
1025 icl->power(icd->pdev, 0);
1026
1027 mutex_unlock(&icd->video_lock);
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001028
1029 return 0;
1030
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001031evidstart:
1032 mutex_unlock(&icd->video_lock);
Guennadi Liakhovetskifa489842009-08-25 11:46:43 -03001033 soc_camera_free_user_formats(icd);
1034eiufmt:
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001035 if (icl->board_info) {
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001036 soc_camera_free_i2c(icd);
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001037 } else {
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001038 icl->del_device(icl);
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001039 module_put(control->driver->owner);
1040 }
1041enodrv:
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001042eadddev:
1043 video_device_release(icd->vdev);
1044evdc:
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001045 ici->ops->remove(icd);
1046eadd:
1047 if (icl->power)
1048 icl->power(icd->pdev, 0);
1049epower:
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001050 return ret;
1051}
1052
Guennadi Liakhovetski5d28d522009-12-11 11:15:05 -03001053/*
1054 * This is called on device_unregister, which only means we have to disconnect
1055 * from the host, but not remove ourselves from the device list
1056 */
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001057static int soc_camera_remove(struct device *dev)
1058{
1059 struct soc_camera_device *icd = to_soc_camera_dev(dev);
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001060 struct soc_camera_link *icl = to_soc_camera_link(icd);
1061 struct video_device *vdev = icd->vdev;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001062
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001063 BUG_ON(!dev->parent);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001064
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001065 if (vdev) {
1066 mutex_lock(&icd->video_lock);
1067 video_unregister_device(vdev);
1068 icd->vdev = NULL;
1069 mutex_unlock(&icd->video_lock);
1070 }
1071
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001072 if (icl->board_info) {
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001073 soc_camera_free_i2c(icd);
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001074 } else {
1075 struct device_driver *drv = to_soc_camera_control(icd) ?
1076 to_soc_camera_control(icd)->driver : NULL;
1077 if (drv) {
1078 icl->del_device(icl);
1079 module_put(drv->owner);
1080 }
1081 }
Guennadi Liakhovetskifa489842009-08-25 11:46:43 -03001082 soc_camera_free_user_formats(icd);
Guennadi Liakhovetski025c18a2009-03-13 06:08:20 -03001083
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001084 return 0;
1085}
1086
Robert Jarzmik2e521062008-08-01 20:14:50 -03001087static int soc_camera_suspend(struct device *dev, pm_message_t state)
1088{
1089 struct soc_camera_device *icd = to_soc_camera_dev(dev);
1090 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
1091 int ret = 0;
1092
1093 if (ici->ops->suspend)
1094 ret = ici->ops->suspend(icd, state);
1095
1096 return ret;
1097}
1098
1099static int soc_camera_resume(struct device *dev)
1100{
1101 struct soc_camera_device *icd = to_soc_camera_dev(dev);
1102 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
1103 int ret = 0;
1104
1105 if (ici->ops->resume)
1106 ret = ici->ops->resume(icd);
1107
1108 return ret;
1109}
1110
Guennadi Liakhovetski52d268a2010-07-26 11:37:13 -03001111struct bus_type soc_camera_bus_type = {
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001112 .name = "soc-camera",
1113 .probe = soc_camera_probe,
1114 .remove = soc_camera_remove,
Robert Jarzmik2e521062008-08-01 20:14:50 -03001115 .suspend = soc_camera_suspend,
1116 .resume = soc_camera_resume,
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001117};
Guennadi Liakhovetski52d268a2010-07-26 11:37:13 -03001118EXPORT_SYMBOL_GPL(soc_camera_bus_type);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001119
1120static struct device_driver ic_drv = {
1121 .name = "camera",
1122 .bus = &soc_camera_bus_type,
1123 .owner = THIS_MODULE,
1124};
1125
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001126static void dummy_release(struct device *dev)
1127{
1128}
1129
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -03001130static int default_cropcap(struct soc_camera_device *icd,
1131 struct v4l2_cropcap *a)
1132{
1133 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1134 return v4l2_subdev_call(sd, video, cropcap, a);
1135}
1136
1137static int default_g_crop(struct soc_camera_device *icd, struct v4l2_crop *a)
1138{
1139 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1140 return v4l2_subdev_call(sd, video, g_crop, a);
1141}
1142
1143static int default_s_crop(struct soc_camera_device *icd, struct v4l2_crop *a)
1144{
1145 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1146 return v4l2_subdev_call(sd, video, s_crop, a);
1147}
1148
Janusz Krzysztofik06e17822010-09-10 22:26:16 -03001149static int default_g_parm(struct soc_camera_device *icd,
1150 struct v4l2_streamparm *parm)
1151{
1152 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1153 return v4l2_subdev_call(sd, video, g_parm, parm);
1154}
1155
1156static int default_s_parm(struct soc_camera_device *icd,
1157 struct v4l2_streamparm *parm)
1158{
1159 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1160 return v4l2_subdev_call(sd, video, s_parm, parm);
1161}
1162
Guennadi Liakhovetski64ff9ba2009-11-09 16:12:37 -03001163static void soc_camera_device_init(struct device *dev, void *pdata)
1164{
1165 dev->platform_data = pdata;
1166 dev->bus = &soc_camera_bus_type;
1167 dev->release = dummy_release;
1168}
1169
Guennadi Liakhovetskib8d99042008-04-04 13:41:25 -03001170int soc_camera_host_register(struct soc_camera_host *ici)
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001171{
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001172 struct soc_camera_host *ix;
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001173 int ret;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001174
Guennadi Liakhovetski64f59052008-12-18 11:51:55 -03001175 if (!ici || !ici->ops ||
1176 !ici->ops->try_fmt ||
1177 !ici->ops->set_fmt ||
1178 !ici->ops->set_bus_param ||
1179 !ici->ops->querycap ||
1180 !ici->ops->init_videobuf ||
1181 !ici->ops->reqbufs ||
1182 !ici->ops->add ||
1183 !ici->ops->remove ||
Guennadi Liakhovetskieff505f2009-04-24 12:55:48 -03001184 !ici->ops->poll ||
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001185 !ici->v4l2_dev.dev)
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001186 return -EINVAL;
1187
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -03001188 if (!ici->ops->set_crop)
1189 ici->ops->set_crop = default_s_crop;
1190 if (!ici->ops->get_crop)
1191 ici->ops->get_crop = default_g_crop;
1192 if (!ici->ops->cropcap)
1193 ici->ops->cropcap = default_cropcap;
Janusz Krzysztofik06e17822010-09-10 22:26:16 -03001194 if (!ici->ops->set_parm)
1195 ici->ops->set_parm = default_s_parm;
1196 if (!ici->ops->get_parm)
1197 ici->ops->get_parm = default_g_parm;
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -03001198
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001199 mutex_lock(&list_lock);
1200 list_for_each_entry(ix, &hosts, list) {
1201 if (ix->nr == ici->nr) {
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001202 ret = -EBUSY;
1203 goto edevreg;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001204 }
1205 }
1206
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001207 ret = v4l2_device_register(ici->v4l2_dev.dev, &ici->v4l2_dev);
1208 if (ret < 0)
1209 goto edevreg;
Guennadi Liakhovetskieff505f2009-04-24 12:55:48 -03001210
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001211 list_add_tail(&ici->list, &hosts);
1212 mutex_unlock(&list_lock);
1213
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001214 scan_add_host(ici);
1215
1216 return 0;
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001217
1218edevreg:
1219 mutex_unlock(&list_lock);
1220 return ret;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001221}
1222EXPORT_SYMBOL(soc_camera_host_register);
1223
1224/* Unregister all clients! */
1225void soc_camera_host_unregister(struct soc_camera_host *ici)
1226{
1227 struct soc_camera_device *icd;
1228
1229 mutex_lock(&list_lock);
1230
1231 list_del(&ici->list);
1232
1233 list_for_each_entry(icd, &devices, list) {
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001234 if (icd->iface == ici->nr) {
Guennadi Liakhovetski64ff9ba2009-11-09 16:12:37 -03001235 void *pdata = icd->dev.platform_data;
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001236 /* The bus->remove will be called */
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001237 device_unregister(&icd->dev);
Guennadi Liakhovetski76823b72009-10-05 12:54:54 -03001238 /*
1239 * Not before device_unregister(), .remove
1240 * needs parent to call ici->ops->remove().
1241 * If the host module is loaded again, device_register()
1242 * would complain "already initialised," since 2.6.32
1243 * this is also needed to prevent use-after-free of the
1244 * device private data.
1245 */
1246 memset(&icd->dev, 0, sizeof(icd->dev));
Guennadi Liakhovetski64ff9ba2009-11-09 16:12:37 -03001247 soc_camera_device_init(&icd->dev, pdata);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001248 }
1249 }
1250
1251 mutex_unlock(&list_lock);
1252
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001253 v4l2_device_unregister(&ici->v4l2_dev);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001254}
1255EXPORT_SYMBOL(soc_camera_host_unregister);
1256
1257/* Image capture device */
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001258static int soc_camera_device_register(struct soc_camera_device *icd)
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001259{
1260 struct soc_camera_device *ix;
1261 int num = -1, i;
1262
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001263 for (i = 0; i < 256 && num < 0; i++) {
1264 num = i;
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001265 /* Check if this index is available on this interface */
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001266 list_for_each_entry(ix, &devices, list) {
1267 if (ix->iface == icd->iface && ix->devnum == i) {
1268 num = -1;
1269 break;
1270 }
1271 }
1272 }
1273
1274 if (num < 0)
Guennadi Liakhovetski5d28d522009-12-11 11:15:05 -03001275 /*
1276 * ok, we have 256 cameras on this host...
1277 * man, stay reasonable...
1278 */
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001279 return -ENOMEM;
1280
Guennadi Liakhovetski64ff9ba2009-11-09 16:12:37 -03001281 icd->devnum = num;
Guennadi Liakhovetski64f59052008-12-18 11:51:55 -03001282 icd->use_count = 0;
1283 icd->host_priv = NULL;
Guennadi Liakhovetski1c3bb742008-12-18 12:28:54 -03001284 mutex_init(&icd->video_lock);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001285
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001286 list_add_tail(&icd->list, &devices);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001287
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001288 return 0;
1289}
1290
1291static void soc_camera_device_unregister(struct soc_camera_device *icd)
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001292{
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001293 list_del(&icd->list);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001294}
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001295
Hans Verkuila3998102008-07-21 02:57:38 -03001296static const struct v4l2_ioctl_ops soc_camera_ioctl_ops = {
1297 .vidioc_querycap = soc_camera_querycap,
1298 .vidioc_g_fmt_vid_cap = soc_camera_g_fmt_vid_cap,
1299 .vidioc_enum_fmt_vid_cap = soc_camera_enum_fmt_vid_cap,
1300 .vidioc_s_fmt_vid_cap = soc_camera_s_fmt_vid_cap,
1301 .vidioc_enum_input = soc_camera_enum_input,
1302 .vidioc_g_input = soc_camera_g_input,
1303 .vidioc_s_input = soc_camera_s_input,
1304 .vidioc_s_std = soc_camera_s_std,
1305 .vidioc_reqbufs = soc_camera_reqbufs,
1306 .vidioc_try_fmt_vid_cap = soc_camera_try_fmt_vid_cap,
1307 .vidioc_querybuf = soc_camera_querybuf,
1308 .vidioc_qbuf = soc_camera_qbuf,
1309 .vidioc_dqbuf = soc_camera_dqbuf,
1310 .vidioc_streamon = soc_camera_streamon,
1311 .vidioc_streamoff = soc_camera_streamoff,
1312 .vidioc_queryctrl = soc_camera_queryctrl,
1313 .vidioc_g_ctrl = soc_camera_g_ctrl,
1314 .vidioc_s_ctrl = soc_camera_s_ctrl,
1315 .vidioc_cropcap = soc_camera_cropcap,
1316 .vidioc_g_crop = soc_camera_g_crop,
1317 .vidioc_s_crop = soc_camera_s_crop,
Guennadi Liakhovetskic9f6ef62010-02-09 18:00:30 +01001318 .vidioc_g_parm = soc_camera_g_parm,
1319 .vidioc_s_parm = soc_camera_s_parm,
Hans Verkuila3998102008-07-21 02:57:38 -03001320 .vidioc_g_chip_ident = soc_camera_g_chip_ident,
1321#ifdef CONFIG_VIDEO_ADV_DEBUG
1322 .vidioc_g_register = soc_camera_g_register,
1323 .vidioc_s_register = soc_camera_s_register,
1324#endif
1325};
1326
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001327static int video_dev_create(struct soc_camera_device *icd)
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001328{
1329 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001330 struct video_device *vdev = video_device_alloc();
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001331
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001332 if (!vdev)
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001333 return -ENOMEM;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001334
1335 strlcpy(vdev->name, ici->drv_name, sizeof(vdev->name));
Guennadi Liakhovetski1c3bb742008-12-18 12:28:54 -03001336
Hans Verkuil5e85e732008-07-20 06:31:39 -03001337 vdev->parent = &icd->dev;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001338 vdev->current_norm = V4L2_STD_UNKNOWN;
1339 vdev->fops = &soc_camera_fops;
Hans Verkuila3998102008-07-21 02:57:38 -03001340 vdev->ioctl_ops = &soc_camera_ioctl_ops;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001341 vdev->release = video_device_release;
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001342 vdev->tvnorms = V4L2_STD_UNKNOWN;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001343
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001344 icd->vdev = vdev;
1345
1346 return 0;
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001347}
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001348
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001349/*
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001350 * Called from soc_camera_probe() above (with .video_lock held???)
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001351 */
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001352static int soc_camera_video_start(struct soc_camera_device *icd)
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001353{
Mauro Carvalho Chehab4f9fb5e2010-05-18 00:46:09 -03001354 struct device_type *type = icd->vdev->dev.type;
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001355 int ret;
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001356
1357 if (!icd->dev.parent)
1358 return -ENODEV;
1359
1360 if (!icd->ops ||
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001361 !icd->ops->query_bus_param ||
1362 !icd->ops->set_bus_param)
1363 return -EINVAL;
1364
Laurent Pinchart46b21092009-12-10 11:51:38 -02001365 ret = video_register_device(icd->vdev, VFL_TYPE_GRABBER, -1);
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001366 if (ret < 0) {
1367 dev_err(&icd->dev, "video_register_device failed: %d\n", ret);
1368 return ret;
1369 }
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001370
Mauro Carvalho Chehab4f9fb5e2010-05-18 00:46:09 -03001371 /* Restore device type, possibly set by the subdevice driver */
1372 icd->vdev->dev.type = type;
1373
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001374 return 0;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001375}
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001376
Guennadi Liakhovetskic41deba2009-08-25 11:06:21 -03001377static int __devinit soc_camera_pdrv_probe(struct platform_device *pdev)
1378{
1379 struct soc_camera_link *icl = pdev->dev.platform_data;
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001380 struct soc_camera_device *icd;
1381 int ret;
Guennadi Liakhovetskic41deba2009-08-25 11:06:21 -03001382
1383 if (!icl)
1384 return -EINVAL;
1385
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001386 icd = kzalloc(sizeof(*icd), GFP_KERNEL);
1387 if (!icd)
1388 return -ENOMEM;
Guennadi Liakhovetskic41deba2009-08-25 11:06:21 -03001389
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001390 icd->iface = icl->bus_id;
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001391 icd->pdev = &pdev->dev;
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001392 platform_set_drvdata(pdev, icd);
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001393
1394 ret = soc_camera_device_register(icd);
1395 if (ret < 0)
1396 goto escdevreg;
1397
Guennadi Liakhovetski64ff9ba2009-11-09 16:12:37 -03001398 soc_camera_device_init(&icd->dev, icl);
1399
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -03001400 icd->user_width = DEFAULT_WIDTH;
1401 icd->user_height = DEFAULT_HEIGHT;
1402
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001403 return 0;
1404
1405escdevreg:
1406 kfree(icd);
1407
1408 return ret;
Guennadi Liakhovetskic41deba2009-08-25 11:06:21 -03001409}
1410
Guennadi Liakhovetski5d28d522009-12-11 11:15:05 -03001411/*
1412 * Only called on rmmod for each platform device, since they are not
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001413 * hot-pluggable. Now we know, that all our users - hosts and devices have
Guennadi Liakhovetski5d28d522009-12-11 11:15:05 -03001414 * been unloaded already
1415 */
Guennadi Liakhovetskic41deba2009-08-25 11:06:21 -03001416static int __devexit soc_camera_pdrv_remove(struct platform_device *pdev)
1417{
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001418 struct soc_camera_device *icd = platform_get_drvdata(pdev);
Guennadi Liakhovetskic41deba2009-08-25 11:06:21 -03001419
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001420 if (!icd)
1421 return -EINVAL;
1422
1423 soc_camera_device_unregister(icd);
1424
1425 kfree(icd);
1426
Guennadi Liakhovetski0fd327b2009-05-07 13:25:32 -03001427 return 0;
1428}
1429
1430static struct platform_driver __refdata soc_camera_pdrv = {
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001431 .remove = __devexit_p(soc_camera_pdrv_remove),
1432 .driver = {
1433 .name = "soc-camera-pdrv",
1434 .owner = THIS_MODULE,
Guennadi Liakhovetski0fd327b2009-05-07 13:25:32 -03001435 },
1436};
1437
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001438static int __init soc_camera_init(void)
1439{
1440 int ret = bus_register(&soc_camera_bus_type);
1441 if (ret)
1442 return ret;
1443 ret = driver_register(&ic_drv);
1444 if (ret)
1445 goto edrvr;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001446
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001447 ret = platform_driver_probe(&soc_camera_pdrv, soc_camera_pdrv_probe);
Guennadi Liakhovetski0fd327b2009-05-07 13:25:32 -03001448 if (ret)
1449 goto epdr;
1450
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001451 return 0;
1452
Guennadi Liakhovetski0fd327b2009-05-07 13:25:32 -03001453epdr:
1454 driver_unregister(&ic_drv);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001455edrvr:
1456 bus_unregister(&soc_camera_bus_type);
1457 return ret;
1458}
1459
1460static void __exit soc_camera_exit(void)
1461{
Guennadi Liakhovetski0fd327b2009-05-07 13:25:32 -03001462 platform_driver_unregister(&soc_camera_pdrv);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001463 driver_unregister(&ic_drv);
1464 bus_unregister(&soc_camera_bus_type);
1465}
1466
1467module_init(soc_camera_init);
1468module_exit(soc_camera_exit);
1469
1470MODULE_DESCRIPTION("Image capture bus driver");
1471MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
1472MODULE_LICENSE("GPL");
Guennadi Liakhovetski0fd327b2009-05-07 13:25:32 -03001473MODULE_ALIAS("platform:soc-camera-pdrv");