blob: b72580c38957855434e12c265567864ddf49e583 [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>
Alberto Panizzo96e442c2010-12-02 07:43:37 -030027#include <linux/regulator/consumer.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090028#include <linux/slab.h>
Mauro Carvalho Chehab4f9fb5e2010-05-18 00:46:09 -030029#include <linux/pm_runtime.h>
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -030030#include <linux/vmalloc.h>
31
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -030032#include <media/soc_camera.h>
Guennadi Liakhovetski0fd327b2009-05-07 13:25:32 -030033#include <media/v4l2-common.h>
Guennadi Liakhovetski0fd327b2009-05-07 13:25:32 -030034#include <media/v4l2-ioctl.h>
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -030035#include <media/v4l2-dev.h>
Guennadi Liakhovetski0fd327b2009-05-07 13:25:32 -030036#include <media/videobuf-core.h>
Guennadi Liakhovetski592c2ab2011-01-29 12:44:51 -030037#include <media/videobuf2-core.h>
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -030038#include <media/soc_mediabus.h>
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -030039
Guennadi Liakhovetskidf2ed072009-03-13 06:08:20 -030040/* Default to VGA resolution */
41#define DEFAULT_WIDTH 640
42#define DEFAULT_HEIGHT 480
43
Guennadi Liakhovetskiaee5c2f2011-03-28 13:28:28 -030044#define is_streaming(ici, icd) \
45 (((ici)->ops->init_videobuf) ? \
46 (icd)->vb_vidq.streaming : \
47 vb2_is_streaming(&(icd)->vb2_vidq))
48
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -030049static LIST_HEAD(hosts);
50static LIST_HEAD(devices);
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -030051static DEFINE_MUTEX(list_lock); /* Protects the list of hosts */
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -030052
Guennadi Liakhovetski3dcc7312011-09-05 12:33:21 -030053static int soc_camera_power_on(struct soc_camera_device *icd,
54 struct soc_camera_link *icl)
Alberto Panizzo96e442c2010-12-02 07:43:37 -030055{
Guennadi Liakhovetski7b9d8c32011-09-08 04:36:06 -030056 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
57 int ret = regulator_bulk_enable(icl->num_regulators,
58 icl->regulators);
Guennadi Liakhovetski3dcc7312011-09-05 12:33:21 -030059 if (ret < 0) {
60 dev_err(icd->pdev, "Cannot enable regulators\n");
61 return ret;
62 }
Alberto Panizzo96e442c2010-12-02 07:43:37 -030063
Guennadi Liakhovetski3dcc7312011-09-05 12:33:21 -030064 if (icl->power) {
65 ret = icl->power(icd->pdev, 1);
Alberto Panizzo96e442c2010-12-02 07:43:37 -030066 if (ret < 0) {
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -030067 dev_err(icd->pdev,
Alberto Panizzo96e442c2010-12-02 07:43:37 -030068 "Platform failed to power-on the camera.\n");
Guennadi Liakhovetski7b9d8c32011-09-08 04:36:06 -030069 goto elinkpwr;
Alberto Panizzo96e442c2010-12-02 07:43:37 -030070 }
Guennadi Liakhovetski3dcc7312011-09-05 12:33:21 -030071 }
72
Guennadi Liakhovetski7b9d8c32011-09-08 04:36:06 -030073 ret = v4l2_subdev_call(sd, core, s_power, 1);
74 if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
75 goto esdpwr;
76
77 return 0;
78
79esdpwr:
80 if (icl->power)
81 icl->power(icd->pdev, 0);
82elinkpwr:
83 regulator_bulk_disable(icl->num_regulators,
84 icl->regulators);
Guennadi Liakhovetski3dcc7312011-09-05 12:33:21 -030085 return ret;
86}
87
88static int soc_camera_power_off(struct soc_camera_device *icd,
89 struct soc_camera_link *icl)
90{
Guennadi Liakhovetski7b9d8c32011-09-08 04:36:06 -030091 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
92 int ret = v4l2_subdev_call(sd, core, s_power, 0);
93
94 if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
95 return ret;
Guennadi Liakhovetski3dcc7312011-09-05 12:33:21 -030096
97 if (icl->power) {
98 ret = icl->power(icd->pdev, 0);
Alberto Panizzo96e442c2010-12-02 07:43:37 -030099 if (ret < 0) {
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300100 dev_err(icd->pdev,
Alberto Panizzo96e442c2010-12-02 07:43:37 -0300101 "Platform failed to power-off the camera.\n");
102 return ret;
103 }
Alberto Panizzo96e442c2010-12-02 07:43:37 -0300104 }
105
Guennadi Liakhovetski3dcc7312011-09-05 12:33:21 -0300106 ret = regulator_bulk_disable(icl->num_regulators,
107 icl->regulators);
108 if (ret < 0)
109 dev_err(icd->pdev, "Cannot disable regulators\n");
110
111 return ret;
Alberto Panizzo96e442c2010-12-02 07:43:37 -0300112}
113
Guennadi Liakhovetskic2786ad2008-12-01 09:45:27 -0300114const struct soc_camera_format_xlate *soc_camera_xlate_by_fourcc(
115 struct soc_camera_device *icd, unsigned int fourcc)
116{
117 unsigned int i;
118
119 for (i = 0; i < icd->num_user_formats; i++)
120 if (icd->user_formats[i].host_fmt->fourcc == fourcc)
121 return icd->user_formats + i;
122 return NULL;
123}
124EXPORT_SYMBOL(soc_camera_xlate_by_fourcc);
125
Guennadi Liakhovetskibd73b362008-12-23 05:54:45 -0300126/**
Guennadi Liakhovetski32c69fcc2011-07-26 11:38:01 -0300127 * soc_camera_apply_board_flags() - apply platform SOCAM_SENSOR_INVERT_* flags
128 * @icl: camera platform parameters
129 * @cfg: media bus configuration
130 * @return: resulting flags
131 */
132unsigned long soc_camera_apply_board_flags(struct soc_camera_link *icl,
133 const struct v4l2_mbus_config *cfg)
134{
135 unsigned long f, flags = cfg->flags;
136
137 /* If only one of the two polarities is supported, switch to the opposite */
138 if (icl->flags & SOCAM_SENSOR_INVERT_HSYNC) {
139 f = flags & (V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW);
140 if (f == V4L2_MBUS_HSYNC_ACTIVE_HIGH || f == V4L2_MBUS_HSYNC_ACTIVE_LOW)
141 flags ^= V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW;
142 }
143
144 if (icl->flags & SOCAM_SENSOR_INVERT_VSYNC) {
145 f = flags & (V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW);
146 if (f == V4L2_MBUS_VSYNC_ACTIVE_HIGH || f == V4L2_MBUS_VSYNC_ACTIVE_LOW)
147 flags ^= V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW;
148 }
149
150 if (icl->flags & SOCAM_SENSOR_INVERT_PCLK) {
151 f = flags & (V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING);
152 if (f == V4L2_MBUS_PCLK_SAMPLE_RISING || f == V4L2_MBUS_PCLK_SAMPLE_FALLING)
153 flags ^= V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING;
154 }
155
156 return flags;
157}
158EXPORT_SYMBOL(soc_camera_apply_board_flags);
159
Sergio Aguirredca6b6d2011-04-11 13:14:33 -0300160#define pixfmtstr(x) (x) & 0xff, ((x) >> 8) & 0xff, ((x) >> 16) & 0xff, \
161 ((x) >> 24) & 0xff
162
163static int soc_camera_try_fmt(struct soc_camera_device *icd,
164 struct v4l2_format *f)
165{
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300166 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
Sergio Aguirredca6b6d2011-04-11 13:14:33 -0300167 struct v4l2_pix_format *pix = &f->fmt.pix;
168 int ret;
169
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300170 dev_dbg(icd->pdev, "TRY_FMT(%c%c%c%c, %ux%u)\n",
Sergio Aguirredca6b6d2011-04-11 13:14:33 -0300171 pixfmtstr(pix->pixelformat), pix->width, pix->height);
172
173 pix->bytesperline = 0;
174 pix->sizeimage = 0;
175
176 ret = ici->ops->try_fmt(icd, f);
177 if (ret < 0)
178 return ret;
179
180 if (!pix->sizeimage) {
181 if (!pix->bytesperline) {
182 const struct soc_camera_format_xlate *xlate;
183
184 xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat);
185 if (!xlate)
186 return -EINVAL;
187
188 ret = soc_mbus_bytes_per_line(pix->width,
189 xlate->host_fmt);
190 if (ret > 0)
191 pix->bytesperline = ret;
192 }
193 if (pix->bytesperline)
194 pix->sizeimage = pix->bytesperline * pix->height;
195 }
196
197 return 0;
198}
199
Hans Verkuil72937892008-06-01 10:35:18 -0300200static int soc_camera_try_fmt_vid_cap(struct file *file, void *priv,
Guennadi Liakhovetskiabe4c472008-12-01 09:44:56 -0300201 struct v4l2_format *f)
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300202{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300203 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300204
205 WARN_ON(priv != file->private_data);
206
Guennadi Liakhovetskid366d4a2011-03-21 06:33:25 -0300207 /* Only single-plane capture is supported so far */
208 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
209 return -EINVAL;
210
Guennadi Liakhovetskiad5f2e82008-03-07 21:57:18 -0300211 /* limit format to hardware capabilities */
Sergio Aguirredca6b6d2011-04-11 13:14:33 -0300212 return soc_camera_try_fmt(icd, f);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300213}
214
215static int soc_camera_enum_input(struct file *file, void *priv,
216 struct v4l2_input *inp)
217{
218 if (inp->index != 0)
219 return -EINVAL;
220
Guennadi Liakhovetski8318a642011-06-07 06:24:32 -0300221 /* default is camera */
222 inp->type = V4L2_INPUT_TYPE_CAMERA;
223 inp->std = V4L2_STD_UNKNOWN;
224 strcpy(inp->name, "Camera");
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300225
Guennadi Liakhovetski8318a642011-06-07 06:24:32 -0300226 return 0;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300227}
228
229static int soc_camera_g_input(struct file *file, void *priv, unsigned int *i)
230{
231 *i = 0;
232
233 return 0;
234}
235
236static int soc_camera_s_input(struct file *file, void *priv, unsigned int i)
237{
238 if (i > 0)
239 return -EINVAL;
240
241 return 0;
242}
243
244static int soc_camera_s_std(struct file *file, void *priv, v4l2_std_id *a)
245{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300246 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetskic9c1f1c2009-08-25 11:46:59 -0300247 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
Kuninori Morimoto513791a2008-12-18 12:46:45 -0300248
Guennadi Liakhovetskic9c1f1c2009-08-25 11:46:59 -0300249 return v4l2_subdev_call(sd, core, s_std, *a);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300250}
251
Guennadi Liakhovetski2f0babb2011-09-09 13:39:20 -0300252static int soc_camera_g_std(struct file *file, void *priv, v4l2_std_id *a)
253{
254 struct soc_camera_device *icd = file->private_data;
255 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
256
257 return v4l2_subdev_call(sd, core, g_std, a);
258}
259
Qing Xued5b65d2011-01-20 05:19:40 -0300260static int soc_camera_enum_fsizes(struct file *file, void *fh,
261 struct v4l2_frmsizeenum *fsize)
262{
263 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300264 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
Qing Xued5b65d2011-01-20 05:19:40 -0300265
266 return ici->ops->enum_fsizes(icd, fsize);
267}
268
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300269static int soc_camera_reqbufs(struct file *file, void *priv,
270 struct v4l2_requestbuffers *p)
271{
272 int ret;
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300273 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300274 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300275
276 WARN_ON(priv != file->private_data);
277
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300278 if (icd->streamer && icd->streamer != file)
279 return -EBUSY;
280
Guennadi Liakhovetski592c2ab2011-01-29 12:44:51 -0300281 if (ici->ops->init_videobuf) {
282 ret = videobuf_reqbufs(&icd->vb_vidq, p);
283 if (ret < 0)
284 return ret;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300285
Guennadi Liakhovetski592c2ab2011-01-29 12:44:51 -0300286 ret = ici->ops->reqbufs(icd, p);
287 } else {
288 ret = vb2_reqbufs(&icd->vb2_vidq, p);
289 }
290
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300291 if (!ret && !icd->streamer)
292 icd->streamer = file;
293
294 return ret;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300295}
296
297static int soc_camera_querybuf(struct file *file, void *priv,
298 struct v4l2_buffer *p)
299{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300300 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300301 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300302
303 WARN_ON(priv != file->private_data);
304
Guennadi Liakhovetski592c2ab2011-01-29 12:44:51 -0300305 if (ici->ops->init_videobuf)
306 return videobuf_querybuf(&icd->vb_vidq, p);
307 else
308 return vb2_querybuf(&icd->vb2_vidq, p);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300309}
310
311static int soc_camera_qbuf(struct file *file, void *priv,
312 struct v4l2_buffer *p)
313{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300314 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300315 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300316
317 WARN_ON(priv != file->private_data);
318
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300319 if (icd->streamer != file)
320 return -EBUSY;
321
Guennadi Liakhovetski592c2ab2011-01-29 12:44:51 -0300322 if (ici->ops->init_videobuf)
323 return videobuf_qbuf(&icd->vb_vidq, p);
324 else
325 return vb2_qbuf(&icd->vb2_vidq, p);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300326}
327
328static int soc_camera_dqbuf(struct file *file, void *priv,
329 struct v4l2_buffer *p)
330{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300331 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300332 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300333
334 WARN_ON(priv != file->private_data);
335
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300336 if (icd->streamer != file)
337 return -EBUSY;
338
Guennadi Liakhovetski592c2ab2011-01-29 12:44:51 -0300339 if (ici->ops->init_videobuf)
340 return videobuf_dqbuf(&icd->vb_vidq, p, file->f_flags & O_NONBLOCK);
341 else
342 return vb2_dqbuf(&icd->vb2_vidq, p, file->f_flags & O_NONBLOCK);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300343}
344
Guennadi Liakhovetski7ae77ee2011-09-28 09:25:28 -0300345static int soc_camera_create_bufs(struct file *file, void *priv,
346 struct v4l2_create_buffers *create)
347{
348 struct soc_camera_device *icd = file->private_data;
349 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
350
351 /* videobuf2 only */
352 if (ici->ops->init_videobuf)
353 return -EINVAL;
354 else
355 return vb2_create_bufs(&icd->vb2_vidq, create);
356}
357
358static int soc_camera_prepare_buf(struct file *file, void *priv,
359 struct v4l2_buffer *b)
360{
361 struct soc_camera_device *icd = file->private_data;
362 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
363
364 /* videobuf2 only */
365 if (ici->ops->init_videobuf)
366 return -EINVAL;
367 else
368 return vb2_prepare_buf(&icd->vb2_vidq, b);
369}
370
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300371/* Always entered with .video_lock held */
Guennadi Liakhovetskic2786ad2008-12-01 09:45:27 -0300372static int soc_camera_init_user_formats(struct soc_camera_device *icd)
373{
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -0300374 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300375 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
Hans Verkuil3805f202010-05-08 17:55:00 -0300376 unsigned int i, fmts = 0, raw_fmts = 0;
377 int ret;
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -0300378 enum v4l2_mbus_pixelcode code;
379
380 while (!v4l2_subdev_call(sd, video, enum_mbus_fmt, raw_fmts, &code))
381 raw_fmts++;
Guennadi Liakhovetskic2786ad2008-12-01 09:45:27 -0300382
383 if (!ici->ops->get_formats)
384 /*
385 * Fallback mode - the host will have to serve all
386 * sensor-provided formats one-to-one to the user
387 */
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -0300388 fmts = raw_fmts;
Guennadi Liakhovetskic2786ad2008-12-01 09:45:27 -0300389 else
390 /*
391 * First pass - only count formats this host-sensor
392 * configuration can provide
393 */
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -0300394 for (i = 0; i < raw_fmts; i++) {
Guennadi Liakhovetskifa489842009-08-25 11:46:43 -0300395 ret = ici->ops->get_formats(icd, i, NULL);
396 if (ret < 0)
397 return ret;
398 fmts += ret;
399 }
Guennadi Liakhovetskic2786ad2008-12-01 09:45:27 -0300400
401 if (!fmts)
402 return -ENXIO;
403
404 icd->user_formats =
405 vmalloc(fmts * sizeof(struct soc_camera_format_xlate));
406 if (!icd->user_formats)
407 return -ENOMEM;
408
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300409 dev_dbg(icd->pdev, "Found %d supported formats.\n", fmts);
Guennadi Liakhovetskic2786ad2008-12-01 09:45:27 -0300410
411 /* Second pass - actually fill data formats */
Stefan Herbrechtsmeier14df2cc2009-06-24 10:31:25 -0300412 fmts = 0;
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -0300413 for (i = 0; i < raw_fmts; i++)
Guennadi Liakhovetskic2786ad2008-12-01 09:45:27 -0300414 if (!ici->ops->get_formats) {
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -0300415 v4l2_subdev_call(sd, video, enum_mbus_fmt, i, &code);
Guennadi Liakhovetskid2dcad42011-05-18 06:49:54 -0300416 icd->user_formats[fmts].host_fmt =
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -0300417 soc_mbus_get_fmtdesc(code);
Guennadi Liakhovetskid2dcad42011-05-18 06:49:54 -0300418 if (icd->user_formats[fmts].host_fmt)
419 icd->user_formats[fmts++].code = code;
Guennadi Liakhovetskic2786ad2008-12-01 09:45:27 -0300420 } else {
Guennadi Liakhovetskifa489842009-08-25 11:46:43 -0300421 ret = ici->ops->get_formats(icd, i,
422 &icd->user_formats[fmts]);
423 if (ret < 0)
424 goto egfmt;
425 fmts += ret;
Guennadi Liakhovetskic2786ad2008-12-01 09:45:27 -0300426 }
427
Guennadi Liakhovetskid2dcad42011-05-18 06:49:54 -0300428 icd->num_user_formats = fmts;
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -0300429 icd->current_fmt = &icd->user_formats[0];
Guennadi Liakhovetskic2786ad2008-12-01 09:45:27 -0300430
431 return 0;
Guennadi Liakhovetskifa489842009-08-25 11:46:43 -0300432
433egfmt:
Guennadi Liakhovetskifa489842009-08-25 11:46:43 -0300434 vfree(icd->user_formats);
435 return ret;
Guennadi Liakhovetskic2786ad2008-12-01 09:45:27 -0300436}
437
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300438/* Always entered with .video_lock held */
Guennadi Liakhovetskic2786ad2008-12-01 09:45:27 -0300439static void soc_camera_free_user_formats(struct soc_camera_device *icd)
440{
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300441 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
Guennadi Liakhovetskifa489842009-08-25 11:46:43 -0300442
443 if (ici->ops->put_formats)
444 ici->ops->put_formats(icd);
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300445 icd->current_fmt = NULL;
Guennadi Liakhovetskifa489842009-08-25 11:46:43 -0300446 icd->num_user_formats = 0;
Guennadi Liakhovetskic2786ad2008-12-01 09:45:27 -0300447 vfree(icd->user_formats);
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300448 icd->user_formats = NULL;
Guennadi Liakhovetskic2786ad2008-12-01 09:45:27 -0300449}
450
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -0300451/* Called with .vb_lock held, or from the first open(2), see comment there */
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300452static int soc_camera_set_fmt(struct soc_camera_device *icd,
Guennadi Liakhovetskidf2ed072009-03-13 06:08:20 -0300453 struct v4l2_format *f)
454{
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300455 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
Guennadi Liakhovetskidf2ed072009-03-13 06:08:20 -0300456 struct v4l2_pix_format *pix = &f->fmt.pix;
457 int ret;
458
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300459 dev_dbg(icd->pdev, "S_FMT(%c%c%c%c, %ux%u)\n",
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -0300460 pixfmtstr(pix->pixelformat), pix->width, pix->height);
461
Guennadi Liakhovetskidf2ed072009-03-13 06:08:20 -0300462 /* We always call try_fmt() before set_fmt() or set_crop() */
Sergio Aguirredca6b6d2011-04-11 13:14:33 -0300463 ret = soc_camera_try_fmt(icd, f);
Guennadi Liakhovetskidf2ed072009-03-13 06:08:20 -0300464 if (ret < 0)
465 return ret;
466
467 ret = ici->ops->set_fmt(icd, f);
468 if (ret < 0) {
469 return ret;
470 } else if (!icd->current_fmt ||
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -0300471 icd->current_fmt->host_fmt->fourcc != pix->pixelformat) {
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300472 dev_err(icd->pdev,
Guennadi Liakhovetskidf2ed072009-03-13 06:08:20 -0300473 "Host driver hasn't set up current format correctly!\n");
474 return -EINVAL;
475 }
476
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -0300477 icd->user_width = pix->width;
478 icd->user_height = pix->height;
Sergio Aguirre0e4c1802011-03-07 21:49:48 -0300479 icd->bytesperline = pix->bytesperline;
480 icd->sizeimage = pix->sizeimage;
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -0300481 icd->colorspace = pix->colorspace;
Guennadi Liakhovetski592c2ab2011-01-29 12:44:51 -0300482 icd->field = pix->field;
483 if (ici->ops->init_videobuf)
484 icd->vb_vidq.field = pix->field;
Guennadi Liakhovetski025c18a2009-03-13 06:08:20 -0300485
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300486 dev_dbg(icd->pdev, "set width: %d height: %d\n",
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -0300487 icd->user_width, icd->user_height);
Guennadi Liakhovetskidf2ed072009-03-13 06:08:20 -0300488
489 /* set physical bus parameters */
490 return ici->ops->set_bus_param(icd, pix->pixelformat);
491}
492
Hans Verkuilbec43662008-12-30 06:58:20 -0300493static int soc_camera_open(struct file *file)
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300494{
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300495 struct video_device *vdev = video_devdata(file);
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300496 struct soc_camera_device *icd = dev_get_drvdata(vdev->parent);
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300497 struct soc_camera_link *icl = to_soc_camera_link(icd);
Guennadi Liakhovetski9dc4e482008-04-22 14:45:32 -0300498 struct soc_camera_host *ici;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300499 int ret;
500
Guennadi Liakhovetskib0050e42011-07-28 13:57:53 -0300501 if (!to_soc_camera_control(icd))
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300502 /* No device driver attached */
503 return -ENODEV;
504
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300505 ici = to_soc_camera_host(icd->parent);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300506
Guennadi Liakhovetskib8d99042008-04-04 13:41:25 -0300507 if (!try_module_get(ici->ops->owner)) {
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300508 dev_err(icd->pdev, "Couldn't lock capture bus driver.\n");
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300509 return -EINVAL;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300510 }
511
Guennadi Liakhovetski1a0063a2008-04-04 13:46:34 -0300512 icd->use_count++;
513
Guennadi Liakhovetski9dc4e482008-04-22 14:45:32 -0300514 /* Now we really have to activate the camera */
515 if (icd->use_count == 1) {
Guennadi Liakhovetski025c18a2009-03-13 06:08:20 -0300516 /* Restore parameters before the last close() per V4L2 API */
Guennadi Liakhovetskidf2ed072009-03-13 06:08:20 -0300517 struct v4l2_format f = {
518 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
519 .fmt.pix = {
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -0300520 .width = icd->user_width,
521 .height = icd->user_height,
Guennadi Liakhovetski025c18a2009-03-13 06:08:20 -0300522 .field = icd->field,
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -0300523 .colorspace = icd->colorspace,
524 .pixelformat =
525 icd->current_fmt->host_fmt->fourcc,
Guennadi Liakhovetskidf2ed072009-03-13 06:08:20 -0300526 },
527 };
528
Guennadi Liakhovetski3dcc7312011-09-05 12:33:21 -0300529 ret = soc_camera_power_on(icd, icl);
Alberto Panizzo96e442c2010-12-02 07:43:37 -0300530 if (ret < 0)
531 goto epower;
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300532
533 /* The camera could have been already on, try to reset */
534 if (icl->reset)
535 icl->reset(icd->pdev);
536
Guennadi Liakhovetskib8d99042008-04-04 13:41:25 -0300537 ret = ici->ops->add(icd);
Guennadi Liakhovetski9dc4e482008-04-22 14:45:32 -0300538 if (ret < 0) {
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300539 dev_err(icd->pdev, "Couldn't activate the camera: %d\n", ret);
Guennadi Liakhovetski9dc4e482008-04-22 14:45:32 -0300540 goto eiciadd;
541 }
Guennadi Liakhovetskidf2ed072009-03-13 06:08:20 -0300542
Mauro Carvalho Chehab4f9fb5e2010-05-18 00:46:09 -0300543 pm_runtime_enable(&icd->vdev->dev);
544 ret = pm_runtime_resume(&icd->vdev->dev);
545 if (ret < 0 && ret != -ENOSYS)
546 goto eresume;
547
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -0300548 /*
549 * Try to configure with default parameters. Notice: this is the
550 * very first open, so, we cannot race against other calls,
551 * apart from someone else calling open() simultaneously, but
552 * .video_lock is protecting us against it.
553 */
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300554 ret = soc_camera_set_fmt(icd, &f);
Guennadi Liakhovetskidf2ed072009-03-13 06:08:20 -0300555 if (ret < 0)
556 goto esfmt;
Guennadi Liakhovetski24d8c022010-12-25 18:29:52 -0300557
Guennadi Liakhovetski592c2ab2011-01-29 12:44:51 -0300558 if (ici->ops->init_videobuf) {
559 ici->ops->init_videobuf(&icd->vb_vidq, icd);
560 } else {
561 ret = ici->ops->init_videobuf2(&icd->vb2_vidq, icd);
562 if (ret < 0)
563 goto einitvb;
564 }
Hans Verkuilee02da62011-09-06 12:36:39 -0300565 v4l2_ctrl_handler_setup(&icd->ctrl_handler);
Guennadi Liakhovetski9dc4e482008-04-22 14:45:32 -0300566 }
567
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300568 file->private_data = icd;
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300569 dev_dbg(icd->pdev, "camera device open\n");
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300570
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300571 return 0;
572
Guennadi Liakhovetskidf2ed072009-03-13 06:08:20 -0300573 /*
Mauro Carvalho Chehab4f9fb5e2010-05-18 00:46:09 -0300574 * First four errors are entered with the .video_lock held
Guennadi Liakhovetskidf2ed072009-03-13 06:08:20 -0300575 * and use_count == 1
576 */
Guennadi Liakhovetski592c2ab2011-01-29 12:44:51 -0300577einitvb:
Guennadi Liakhovetskidf2ed072009-03-13 06:08:20 -0300578esfmt:
Mauro Carvalho Chehab4f9fb5e2010-05-18 00:46:09 -0300579 pm_runtime_disable(&icd->vdev->dev);
580eresume:
Guennadi Liakhovetskidf2ed072009-03-13 06:08:20 -0300581 ici->ops->remove(icd);
Guennadi Liakhovetski9dc4e482008-04-22 14:45:32 -0300582eiciadd:
Guennadi Liakhovetski3dcc7312011-09-05 12:33:21 -0300583 soc_camera_power_off(icd, icl);
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300584epower:
Guennadi Liakhovetskic2786ad2008-12-01 09:45:27 -0300585 icd->use_count--;
Guennadi Liakhovetskib8d99042008-04-04 13:41:25 -0300586 module_put(ici->ops->owner);
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300587
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300588 return ret;
589}
590
Hans Verkuilbec43662008-12-30 06:58:20 -0300591static int soc_camera_close(struct file *file)
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300592{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300593 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300594 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300595
Guennadi Liakhovetski9dc4e482008-04-22 14:45:32 -0300596 icd->use_count--;
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300597 if (!icd->use_count) {
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300598 struct soc_camera_link *icl = to_soc_camera_link(icd);
599
Mauro Carvalho Chehab4f9fb5e2010-05-18 00:46:09 -0300600 pm_runtime_suspend(&icd->vdev->dev);
601 pm_runtime_disable(&icd->vdev->dev);
602
Guennadi Liakhovetskib8d99042008-04-04 13:41:25 -0300603 ici->ops->remove(icd);
Guennadi Liakhovetski592c2ab2011-01-29 12:44:51 -0300604 if (ici->ops->init_videobuf2)
605 vb2_queue_release(&icd->vb2_vidq);
Mauro Carvalho Chehab4f9fb5e2010-05-18 00:46:09 -0300606
Guennadi Liakhovetski3dcc7312011-09-05 12:33:21 -0300607 soc_camera_power_off(icd, icl);
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300608 }
Guennadi Liakhovetski025c18a2009-03-13 06:08:20 -0300609
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300610 if (icd->streamer == file)
611 icd->streamer = NULL;
612
Guennadi Liakhovetskib8d99042008-04-04 13:41:25 -0300613 module_put(ici->ops->owner);
Guennadi Liakhovetski9dc4e482008-04-22 14:45:32 -0300614
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300615 dev_dbg(icd->pdev, "camera device close\n");
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300616
617 return 0;
618}
619
Andrew Mortonaba360d2008-04-22 14:45:59 -0300620static ssize_t soc_camera_read(struct file *file, char __user *buf,
Guennadi Liakhovetskiabe4c472008-12-01 09:44:56 -0300621 size_t count, loff_t *ppos)
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300622{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300623 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300624 int err = -EINVAL;
625
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300626 dev_err(icd->pdev, "camera device read not implemented\n");
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300627
628 return err;
629}
630
631static int soc_camera_mmap(struct file *file, struct vm_area_struct *vma)
632{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300633 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300634 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300635 int err;
636
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300637 dev_dbg(icd->pdev, "mmap called, vma=0x%08lx\n", (unsigned long)vma);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300638
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300639 if (icd->streamer != file)
640 return -EBUSY;
641
Guennadi Liakhovetski592c2ab2011-01-29 12:44:51 -0300642 if (ici->ops->init_videobuf)
643 err = videobuf_mmap_mapper(&icd->vb_vidq, vma);
644 else
645 err = vb2_mmap(&icd->vb2_vidq, vma);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300646
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300647 dev_dbg(icd->pdev, "vma start=0x%08lx, size=%ld, ret=%d\n",
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300648 (unsigned long)vma->vm_start,
649 (unsigned long)vma->vm_end - (unsigned long)vma->vm_start,
650 err);
651
652 return err;
653}
654
655static unsigned int soc_camera_poll(struct file *file, poll_table *pt)
656{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300657 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300658 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300659
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300660 if (icd->streamer != file)
661 return -EBUSY;
662
Guennadi Liakhovetski592c2ab2011-01-29 12:44:51 -0300663 if (ici->ops->init_videobuf && list_empty(&icd->vb_vidq.stream)) {
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300664 dev_err(icd->pdev, "Trying to poll with no queued buffers!\n");
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300665 return POLLERR;
666 }
667
Guennadi Liakhovetskib8d99042008-04-04 13:41:25 -0300668 return ici->ops->poll(file, pt);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300669}
670
Guennadi Liakhovetski592c2ab2011-01-29 12:44:51 -0300671void soc_camera_lock(struct vb2_queue *vq)
672{
673 struct soc_camera_device *icd = vb2_get_drv_priv(vq);
674 mutex_lock(&icd->video_lock);
675}
676EXPORT_SYMBOL(soc_camera_lock);
677
678void soc_camera_unlock(struct vb2_queue *vq)
679{
680 struct soc_camera_device *icd = vb2_get_drv_priv(vq);
681 mutex_unlock(&icd->video_lock);
682}
683EXPORT_SYMBOL(soc_camera_unlock);
684
Hans Verkuilbec43662008-12-30 06:58:20 -0300685static struct v4l2_file_operations soc_camera_fops = {
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300686 .owner = THIS_MODULE,
687 .open = soc_camera_open,
688 .release = soc_camera_close,
Guennadi Liakhovetskib6a633c2010-12-25 17:40:26 -0300689 .unlocked_ioctl = video_ioctl2,
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300690 .read = soc_camera_read,
691 .mmap = soc_camera_mmap,
692 .poll = soc_camera_poll,
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300693};
694
Hans Verkuil72937892008-06-01 10:35:18 -0300695static int soc_camera_s_fmt_vid_cap(struct file *file, void *priv,
Guennadi Liakhovetskiabe4c472008-12-01 09:44:56 -0300696 struct v4l2_format *f)
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300697{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300698 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300699 int ret;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300700
701 WARN_ON(priv != file->private_data);
702
Guennadi Liakhovetskid366d4a2011-03-21 06:33:25 -0300703 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300704 dev_warn(icd->pdev, "Wrong buf-type %d\n", f->type);
Guennadi Liakhovetskid366d4a2011-03-21 06:33:25 -0300705 return -EINVAL;
706 }
707
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300708 if (icd->streamer && icd->streamer != file)
709 return -EBUSY;
Guennadi Liakhovetski1c3bb742008-12-18 12:28:54 -0300710
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300711 if (is_streaming(to_soc_camera_host(icd->parent), icd)) {
712 dev_err(icd->pdev, "S_FMT denied: queue initialised\n");
Guennadi Liakhovetskib6a633c2010-12-25 17:40:26 -0300713 return -EBUSY;
Guennadi Liakhovetski1c3bb742008-12-18 12:28:54 -0300714 }
715
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300716 ret = soc_camera_set_fmt(icd, f);
717
718 if (!ret && !icd->streamer)
719 icd->streamer = file;
Guennadi Liakhovetski1c3bb742008-12-18 12:28:54 -0300720
Guennadi Liakhovetski1c3bb742008-12-18 12:28:54 -0300721 return ret;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300722}
723
Hans Verkuil72937892008-06-01 10:35:18 -0300724static int soc_camera_enum_fmt_vid_cap(struct file *file, void *priv,
Guennadi Liakhovetskiabe4c472008-12-01 09:44:56 -0300725 struct v4l2_fmtdesc *f)
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300726{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300727 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -0300728 const struct soc_mbus_pixelfmt *format;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300729
730 WARN_ON(priv != file->private_data);
731
Guennadi Liakhovetskic2786ad2008-12-01 09:45:27 -0300732 if (f->index >= icd->num_user_formats)
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300733 return -EINVAL;
734
Guennadi Liakhovetskic2786ad2008-12-01 09:45:27 -0300735 format = icd->user_formats[f->index].host_fmt;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300736
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -0300737 if (format->name)
738 strlcpy(f->description, format->name, sizeof(f->description));
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300739 f->pixelformat = format->fourcc;
740 return 0;
741}
742
Hans Verkuil72937892008-06-01 10:35:18 -0300743static int soc_camera_g_fmt_vid_cap(struct file *file, void *priv,
Guennadi Liakhovetskiabe4c472008-12-01 09:44:56 -0300744 struct v4l2_format *f)
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300745{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300746 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetski64f59052008-12-18 11:51:55 -0300747 struct v4l2_pix_format *pix = &f->fmt.pix;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300748
749 WARN_ON(priv != file->private_data);
750
Guennadi Liakhovetskid366d4a2011-03-21 06:33:25 -0300751 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
752 return -EINVAL;
753
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -0300754 pix->width = icd->user_width;
755 pix->height = icd->user_height;
Sergio Aguirre0e4c1802011-03-07 21:49:48 -0300756 pix->bytesperline = icd->bytesperline;
757 pix->sizeimage = icd->sizeimage;
Guennadi Liakhovetski592c2ab2011-01-29 12:44:51 -0300758 pix->field = icd->field;
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -0300759 pix->pixelformat = icd->current_fmt->host_fmt->fourcc;
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -0300760 pix->colorspace = icd->colorspace;
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300761 dev_dbg(icd->pdev, "current_fmt->fourcc: 0x%08x\n",
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -0300762 icd->current_fmt->host_fmt->fourcc);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300763 return 0;
764}
765
766static int soc_camera_querycap(struct file *file, void *priv,
767 struct v4l2_capability *cap)
768{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300769 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300770 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300771
772 WARN_ON(priv != file->private_data);
773
774 strlcpy(cap->driver, ici->drv_name, sizeof(cap->driver));
Guennadi Liakhovetskib8d99042008-04-04 13:41:25 -0300775 return ici->ops->querycap(ici, cap);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300776}
777
778static int soc_camera_streamon(struct file *file, void *priv,
779 enum v4l2_buf_type i)
780{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300781 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300782 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
Guennadi Liakhovetskic9c1f1c2009-08-25 11:46:59 -0300783 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
Guennadi Liakhovetski1c3bb742008-12-18 12:28:54 -0300784 int ret;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300785
786 WARN_ON(priv != file->private_data);
787
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300788 if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE)
789 return -EINVAL;
790
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300791 if (icd->streamer != file)
792 return -EBUSY;
793
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300794 /* This calls buf_queue from host driver's videobuf_queue_ops */
Guennadi Liakhovetski592c2ab2011-01-29 12:44:51 -0300795 if (ici->ops->init_videobuf)
796 ret = videobuf_streamon(&icd->vb_vidq);
797 else
798 ret = vb2_streamon(&icd->vb2_vidq, i);
799
Anatolij Gustschin7fdbd852011-01-31 09:19:32 -0300800 if (!ret)
801 v4l2_subdev_call(sd, video, s_stream, 1);
Guennadi Liakhovetski1c3bb742008-12-18 12:28:54 -0300802
Guennadi Liakhovetski1c3bb742008-12-18 12:28:54 -0300803 return ret;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300804}
805
806static int soc_camera_streamoff(struct file *file, void *priv,
807 enum v4l2_buf_type i)
808{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300809 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetskic9c1f1c2009-08-25 11:46:59 -0300810 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300811 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300812
813 WARN_ON(priv != file->private_data);
814
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300815 if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE)
816 return -EINVAL;
817
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300818 if (icd->streamer != file)
819 return -EBUSY;
820
Guennadi Liakhovetski5d28d522009-12-11 11:15:05 -0300821 /*
822 * This calls buf_release from host driver's videobuf_queue_ops for all
823 * remaining buffers. When the last buffer is freed, stop capture
824 */
Guennadi Liakhovetski592c2ab2011-01-29 12:44:51 -0300825 if (ici->ops->init_videobuf)
826 videobuf_streamoff(&icd->vb_vidq);
827 else
828 vb2_streamoff(&icd->vb2_vidq, i);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300829
Guennadi Liakhovetskic9c1f1c2009-08-25 11:46:59 -0300830 v4l2_subdev_call(sd, video, s_stream, 0);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300831
832 return 0;
833}
834
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300835static int soc_camera_cropcap(struct file *file, void *fh,
836 struct v4l2_cropcap *a)
837{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300838 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300839 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300840
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -0300841 return ici->ops->cropcap(icd, a);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300842}
843
844static int soc_camera_g_crop(struct file *file, void *fh,
845 struct v4l2_crop *a)
846{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300847 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300848 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -0300849 int ret;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300850
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -0300851 ret = ici->ops->get_crop(icd, a);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300852
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -0300853 return ret;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300854}
855
Guennadi Liakhovetski68a54f02009-08-25 11:46:52 -0300856/*
857 * According to the V4L2 API, drivers shall not update the struct v4l2_crop
858 * argument with the actual geometry, instead, the user shall use G_CROP to
Guennadi Liakhovetskiab56d5e2010-03-23 11:31:46 -0300859 * retrieve it.
Guennadi Liakhovetski68a54f02009-08-25 11:46:52 -0300860 */
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300861static int soc_camera_s_crop(struct file *file, void *fh,
862 struct v4l2_crop *a)
863{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300864 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300865 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -0300866 struct v4l2_rect *rect = &a->c;
867 struct v4l2_crop current_crop;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300868 int ret;
869
870 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
871 return -EINVAL;
872
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300873 dev_dbg(icd->pdev, "S_CROP(%ux%u@%u:%u)\n",
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -0300874 rect->width, rect->height, rect->left, rect->top);
875
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -0300876 /* If get_crop fails, we'll let host and / or client drivers decide */
877 ret = ici->ops->get_crop(icd, &current_crop);
878
Guennadi Liakhovetskib897a912009-08-25 11:46:53 -0300879 /* Prohibit window size change with initialised buffers */
Guennadi Liakhovetski103754a2010-08-05 19:23:44 -0300880 if (ret < 0) {
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300881 dev_err(icd->pdev,
Guennadi Liakhovetski103754a2010-08-05 19:23:44 -0300882 "S_CROP denied: getting current crop failed\n");
Guennadi Liakhovetskiaee5c2f2011-03-28 13:28:28 -0300883 } else if ((a->c.width == current_crop.c.width &&
884 a->c.height == current_crop.c.height) ||
885 !is_streaming(ici, icd)) {
886 /* same size or not streaming - use .set_crop() */
887 ret = ici->ops->set_crop(icd, a);
888 } else if (ici->ops->set_livecrop) {
889 ret = ici->ops->set_livecrop(icd, a);
890 } else {
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300891 dev_err(icd->pdev,
Guennadi Liakhovetskib897a912009-08-25 11:46:53 -0300892 "S_CROP denied: queue initialised and sizes differ\n");
893 ret = -EBUSY;
Guennadi Liakhovetskib897a912009-08-25 11:46:53 -0300894 }
895
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300896 return ret;
897}
898
Guennadi Liakhovetskic9f6ef62010-02-09 18:00:30 +0100899static int soc_camera_g_parm(struct file *file, void *fh,
900 struct v4l2_streamparm *a)
901{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300902 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300903 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
Guennadi Liakhovetskic9f6ef62010-02-09 18:00:30 +0100904
905 if (ici->ops->get_parm)
906 return ici->ops->get_parm(icd, a);
907
908 return -ENOIOCTLCMD;
909}
910
911static int soc_camera_s_parm(struct file *file, void *fh,
912 struct v4l2_streamparm *a)
913{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300914 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300915 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
Guennadi Liakhovetskic9f6ef62010-02-09 18:00:30 +0100916
917 if (ici->ops->set_parm)
918 return ici->ops->set_parm(icd, a);
919
920 return -ENOIOCTLCMD;
921}
922
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300923static int soc_camera_g_chip_ident(struct file *file, void *fh,
Hans Verkuilaecde8b52008-12-30 07:14:19 -0300924 struct v4l2_dbg_chip_ident *id)
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300925{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300926 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetskic9c1f1c2009-08-25 11:46:59 -0300927 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300928
Guennadi Liakhovetskic9c1f1c2009-08-25 11:46:59 -0300929 return v4l2_subdev_call(sd, core, g_chip_ident, id);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300930}
931
932#ifdef CONFIG_VIDEO_ADV_DEBUG
933static int soc_camera_g_register(struct file *file, void *fh,
Hans Verkuilaecde8b52008-12-30 07:14:19 -0300934 struct v4l2_dbg_register *reg)
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300935{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300936 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetskic9c1f1c2009-08-25 11:46:59 -0300937 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300938
Guennadi Liakhovetskic9c1f1c2009-08-25 11:46:59 -0300939 return v4l2_subdev_call(sd, core, g_register, reg);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300940}
941
942static int soc_camera_s_register(struct file *file, void *fh,
Hans Verkuilaecde8b52008-12-30 07:14:19 -0300943 struct v4l2_dbg_register *reg)
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300944{
Guennadi Liakhovetski57bee292010-08-17 14:29:51 -0300945 struct soc_camera_device *icd = file->private_data;
Guennadi Liakhovetskic9c1f1c2009-08-25 11:46:59 -0300946 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300947
Guennadi Liakhovetskic9c1f1c2009-08-25 11:46:59 -0300948 return v4l2_subdev_call(sd, core, s_register, reg);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300949}
950#endif
951
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300952static int soc_camera_probe(struct soc_camera_device *icd);
953
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300954/* So far this function cannot fail */
955static void scan_add_host(struct soc_camera_host *ici)
956{
957 struct soc_camera_device *icd;
958
959 mutex_lock(&list_lock);
960
961 list_for_each_entry(icd, &devices, list) {
962 if (icd->iface == ici->nr) {
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300963 int ret;
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300964
965 icd->parent = ici->v4l2_dev.dev;
966 ret = soc_camera_probe(icd);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300967 }
968 }
969
970 mutex_unlock(&list_lock);
971}
972
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300973#ifdef CONFIG_I2C_BOARDINFO
974static int soc_camera_init_i2c(struct soc_camera_device *icd,
975 struct soc_camera_link *icl)
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300976{
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300977 struct i2c_client *client;
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300978 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300979 struct i2c_adapter *adap = i2c_get_adapter(icl->i2c_adapter_id);
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300980 struct v4l2_subdev *subdev;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300981
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300982 if (!adap) {
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300983 dev_err(icd->pdev, "Cannot get I2C adapter #%d. No driver?\n",
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300984 icl->i2c_adapter_id);
985 goto ei2cga;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300986 }
987
Guennadi Liakhovetski2f0babb2011-09-09 13:39:20 -0300988 icl->board_info->platform_data = icl;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300989
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300990 subdev = v4l2_i2c_new_subdev_board(&ici->v4l2_dev, adap,
Laurent Pinchart9a1f8b32010-09-24 10:16:44 -0300991 icl->board_info, NULL);
Magnus Dammd74f8412010-02-09 17:40:40 +0900992 if (!subdev)
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300993 goto ei2cnd;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -0300994
Laurent Pinchartc4ce6d12010-07-30 17:24:54 -0300995 client = v4l2_get_subdevdata(subdev);
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300996
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300997 /* Use to_i2c_client(dev) to recover the i2c client */
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -0300998 icd->control = &client->dev;
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300999
1000 return 0;
1001ei2cnd:
1002 i2c_put_adapter(adap);
1003ei2cga:
Magnus Dammd74f8412010-02-09 17:40:40 +09001004 return -ENODEV;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001005}
1006
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001007static void soc_camera_free_i2c(struct soc_camera_device *icd)
1008{
1009 struct i2c_client *client =
1010 to_i2c_client(to_soc_camera_control(icd));
Guennadi Liakhovetskic8dd7072011-03-23 05:26:11 -03001011 struct i2c_adapter *adap = client->adapter;
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -03001012
1013 icd->control = NULL;
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001014 v4l2_device_unregister_subdev(i2c_get_clientdata(client));
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001015 i2c_unregister_device(client);
Guennadi Liakhovetskic8dd7072011-03-23 05:26:11 -03001016 i2c_put_adapter(adap);
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001017}
1018#else
1019#define soc_camera_init_i2c(icd, icl) (-ENODEV)
1020#define soc_camera_free_i2c(icd) do {} while (0)
1021#endif
1022
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001023static int soc_camera_video_start(struct soc_camera_device *icd);
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001024static int video_dev_create(struct soc_camera_device *icd);
1025/* Called during host-driver probe */
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -03001026static int soc_camera_probe(struct soc_camera_device *icd)
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001027{
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -03001028 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001029 struct soc_camera_link *icl = to_soc_camera_link(icd);
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001030 struct device *control = NULL;
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -03001031 struct v4l2_subdev *sd;
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -03001032 struct v4l2_mbus_framefmt mf;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001033 int ret;
1034
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -03001035 dev_info(icd->pdev, "Probing %s\n", dev_name(icd->pdev));
Guennadi Liakhovetski1c3bb742008-12-18 12:28:54 -03001036
Hans Verkuilee02da62011-09-06 12:36:39 -03001037 /*
1038 * Currently the subdev with the largest number of controls (13) is
1039 * ov6550. So let's pick 16 as a hint for the control handler. Note
1040 * that this is a hint only: too large and you waste some memory, too
1041 * small and there is a (very) small performance hit when looking up
1042 * controls in the internal hash.
1043 */
1044 ret = v4l2_ctrl_handler_init(&icd->ctrl_handler, 16);
1045 if (ret < 0)
1046 return ret;
1047
Alberto Panizzo96e442c2010-12-02 07:43:37 -03001048 ret = regulator_bulk_get(icd->pdev, icl->num_regulators,
1049 icl->regulators);
1050 if (ret < 0)
1051 goto ereg;
1052
Guennadi Liakhovetski7b9d8c32011-09-08 04:36:06 -03001053 /*
1054 * This will not yet call v4l2_subdev_core_ops::s_power(1), because the
1055 * subdevice has not been initialised yet. We'll have to call it once
1056 * again after initialisation, even though it shouldn't be needed, we
1057 * don't do any IO here.
1058 */
Guennadi Liakhovetski3dcc7312011-09-05 12:33:21 -03001059 ret = soc_camera_power_on(icd, icl);
Alberto Panizzo96e442c2010-12-02 07:43:37 -03001060 if (ret < 0)
1061 goto epower;
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001062
1063 /* The camera could have been already on, try to reset */
1064 if (icl->reset)
1065 icl->reset(icd->pdev);
1066
1067 ret = ici->ops->add(icd);
1068 if (ret < 0)
1069 goto eadd;
1070
1071 /* Must have icd->vdev before registering the device */
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001072 ret = video_dev_create(icd);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001073 if (ret < 0)
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001074 goto evdc;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001075
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001076 /* Non-i2c cameras, e.g., soc_camera_platform, have no board_info */
1077 if (icl->board_info) {
1078 ret = soc_camera_init_i2c(icd, icl);
1079 if (ret < 0)
1080 goto eadddev;
1081 } else if (!icl->add_device || !icl->del_device) {
1082 ret = -EINVAL;
1083 goto eadddev;
1084 } else {
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001085 if (icl->module_name)
1086 ret = request_module(icl->module_name);
1087
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -03001088 ret = icl->add_device(icd);
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001089 if (ret < 0)
1090 goto eadddev;
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001091
Guennadi Liakhovetski96c75392009-08-25 11:53:23 -03001092 /*
1093 * FIXME: this is racy, have to use driver-binding notification,
1094 * when it is available
1095 */
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001096 control = to_soc_camera_control(icd);
Guennadi Liakhovetski08590b92009-08-25 11:46:54 -03001097 if (!control || !control->driver || !dev_get_drvdata(control) ||
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001098 !try_module_get(control->driver->owner)) {
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -03001099 icl->del_device(icd);
Guennadi Liakhovetski7ae77ee2011-09-28 09:25:28 -03001100 ret = -ENODEV;
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001101 goto enodrv;
1102 }
Guennadi Liakhovetski025c18a2009-03-13 06:08:20 -03001103 }
1104
Guennadi Liakhovetski24105eb2011-03-23 05:41:28 -03001105 sd = soc_camera_to_subdev(icd);
1106 sd->grp_id = (long)icd;
1107
Hans Verkuilee02da62011-09-06 12:36:39 -03001108 if (v4l2_ctrl_add_handler(&icd->ctrl_handler, sd->ctrl_handler))
1109 goto ectrl;
1110
Guennadi Liakhovetskifa489842009-08-25 11:46:43 -03001111 /* At this point client .probe() should have run already */
1112 ret = soc_camera_init_user_formats(icd);
1113 if (ret < 0)
1114 goto eiufmt;
1115
Guennadi Liakhovetskifa489842009-08-25 11:46:43 -03001116 icd->field = V4L2_FIELD_ANY;
1117
Guennadi Liakhovetskib6a633c2010-12-25 17:40:26 -03001118 /*
1119 * ..._video_start() will create a device node, video_register_device()
1120 * itself is protected against concurrent open() calls, but we also have
1121 * to protect our data.
1122 */
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001123 mutex_lock(&icd->video_lock);
1124
1125 ret = soc_camera_video_start(icd);
1126 if (ret < 0)
1127 goto evidstart;
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001128
Guennadi Liakhovetski7b9d8c32011-09-08 04:36:06 -03001129 ret = v4l2_subdev_call(sd, core, s_power, 1);
1130 if (ret < 0 && ret != -ENOIOCTLCMD)
1131 goto esdpwr;
1132
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -03001133 /* Try to improve our guess of a reasonable window format */
Guennadi Liakhovetski760697b2009-12-11 11:46:49 -03001134 if (!v4l2_subdev_call(sd, video, g_mbus_fmt, &mf)) {
1135 icd->user_width = mf.width;
1136 icd->user_height = mf.height;
1137 icd->colorspace = mf.colorspace;
1138 icd->field = mf.field;
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -03001139 }
1140
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001141 ici->ops->remove(icd);
1142
Guennadi Liakhovetski3dcc7312011-09-05 12:33:21 -03001143 soc_camera_power_off(icd, icl);
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001144
1145 mutex_unlock(&icd->video_lock);
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001146
1147 return 0;
1148
Guennadi Liakhovetski7b9d8c32011-09-08 04:36:06 -03001149esdpwr:
1150 video_unregister_device(icd->vdev);
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001151evidstart:
1152 mutex_unlock(&icd->video_lock);
Guennadi Liakhovetskifa489842009-08-25 11:46:43 -03001153 soc_camera_free_user_formats(icd);
1154eiufmt:
Hans Verkuilee02da62011-09-06 12:36:39 -03001155ectrl:
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001156 if (icl->board_info) {
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001157 soc_camera_free_i2c(icd);
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001158 } else {
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -03001159 icl->del_device(icd);
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001160 module_put(control->driver->owner);
1161 }
1162enodrv:
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001163eadddev:
1164 video_device_release(icd->vdev);
Guennadi Liakhovetski7b9d8c32011-09-08 04:36:06 -03001165 icd->vdev = NULL;
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001166evdc:
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001167 ici->ops->remove(icd);
1168eadd:
Guennadi Liakhovetski3dcc7312011-09-05 12:33:21 -03001169 soc_camera_power_off(icd, icl);
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001170epower:
Alberto Panizzo96e442c2010-12-02 07:43:37 -03001171 regulator_bulk_free(icl->num_regulators, icl->regulators);
1172ereg:
Hans Verkuilee02da62011-09-06 12:36:39 -03001173 v4l2_ctrl_handler_free(&icd->ctrl_handler);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001174 return ret;
1175}
1176
Guennadi Liakhovetski5d28d522009-12-11 11:15:05 -03001177/*
1178 * This is called on device_unregister, which only means we have to disconnect
1179 * from the host, but not remove ourselves from the device list
1180 */
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -03001181static int soc_camera_remove(struct soc_camera_device *icd)
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001182{
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001183 struct soc_camera_link *icl = to_soc_camera_link(icd);
1184 struct video_device *vdev = icd->vdev;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001185
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -03001186 BUG_ON(!icd->parent);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001187
Hans Verkuilee02da62011-09-06 12:36:39 -03001188 v4l2_ctrl_handler_free(&icd->ctrl_handler);
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001189 if (vdev) {
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001190 video_unregister_device(vdev);
1191 icd->vdev = NULL;
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001192 }
1193
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001194 if (icl->board_info) {
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001195 soc_camera_free_i2c(icd);
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001196 } else {
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -03001197 struct device_driver *drv = to_soc_camera_control(icd)->driver;
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001198 if (drv) {
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -03001199 icl->del_device(icd);
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001200 module_put(drv->owner);
1201 }
1202 }
Guennadi Liakhovetskifa489842009-08-25 11:46:43 -03001203 soc_camera_free_user_formats(icd);
Guennadi Liakhovetski025c18a2009-03-13 06:08:20 -03001204
Alberto Panizzo96e442c2010-12-02 07:43:37 -03001205 regulator_bulk_free(icl->num_regulators, icl->regulators);
1206
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001207 return 0;
1208}
1209
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -03001210static int default_cropcap(struct soc_camera_device *icd,
1211 struct v4l2_cropcap *a)
1212{
1213 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1214 return v4l2_subdev_call(sd, video, cropcap, a);
1215}
1216
1217static int default_g_crop(struct soc_camera_device *icd, struct v4l2_crop *a)
1218{
1219 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1220 return v4l2_subdev_call(sd, video, g_crop, a);
1221}
1222
1223static int default_s_crop(struct soc_camera_device *icd, struct v4l2_crop *a)
1224{
1225 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1226 return v4l2_subdev_call(sd, video, s_crop, a);
1227}
1228
Janusz Krzysztofik06e17822010-09-10 22:26:16 -03001229static int default_g_parm(struct soc_camera_device *icd,
1230 struct v4l2_streamparm *parm)
1231{
1232 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1233 return v4l2_subdev_call(sd, video, g_parm, parm);
1234}
1235
1236static int default_s_parm(struct soc_camera_device *icd,
1237 struct v4l2_streamparm *parm)
1238{
1239 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1240 return v4l2_subdev_call(sd, video, s_parm, parm);
1241}
1242
Qing Xued5b65d2011-01-20 05:19:40 -03001243static int default_enum_fsizes(struct soc_camera_device *icd,
1244 struct v4l2_frmsizeenum *fsize)
1245{
1246 int ret;
1247 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1248 const struct soc_camera_format_xlate *xlate;
1249 __u32 pixfmt = fsize->pixel_format;
1250 struct v4l2_frmsizeenum fsize_mbus = *fsize;
1251
1252 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1253 if (!xlate)
1254 return -EINVAL;
1255 /* map xlate-code to pixel_format, sensor only handle xlate-code*/
1256 fsize_mbus.pixel_format = xlate->code;
1257
1258 ret = v4l2_subdev_call(sd, video, enum_mbus_fsizes, &fsize_mbus);
1259 if (ret < 0)
1260 return ret;
1261
1262 *fsize = fsize_mbus;
1263 fsize->pixel_format = pixfmt;
1264
1265 return 0;
1266}
1267
Guennadi Liakhovetskib8d99042008-04-04 13:41:25 -03001268int soc_camera_host_register(struct soc_camera_host *ici)
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001269{
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001270 struct soc_camera_host *ix;
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001271 int ret;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001272
Guennadi Liakhovetski64f59052008-12-18 11:51:55 -03001273 if (!ici || !ici->ops ||
1274 !ici->ops->try_fmt ||
1275 !ici->ops->set_fmt ||
1276 !ici->ops->set_bus_param ||
1277 !ici->ops->querycap ||
Guennadi Liakhovetski592c2ab2011-01-29 12:44:51 -03001278 ((!ici->ops->init_videobuf ||
1279 !ici->ops->reqbufs) &&
1280 !ici->ops->init_videobuf2) ||
Guennadi Liakhovetski64f59052008-12-18 11:51:55 -03001281 !ici->ops->add ||
1282 !ici->ops->remove ||
Guennadi Liakhovetskieff505f2009-04-24 12:55:48 -03001283 !ici->ops->poll ||
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001284 !ici->v4l2_dev.dev)
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001285 return -EINVAL;
1286
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -03001287 if (!ici->ops->set_crop)
1288 ici->ops->set_crop = default_s_crop;
1289 if (!ici->ops->get_crop)
1290 ici->ops->get_crop = default_g_crop;
1291 if (!ici->ops->cropcap)
1292 ici->ops->cropcap = default_cropcap;
Janusz Krzysztofik06e17822010-09-10 22:26:16 -03001293 if (!ici->ops->set_parm)
1294 ici->ops->set_parm = default_s_parm;
1295 if (!ici->ops->get_parm)
1296 ici->ops->get_parm = default_g_parm;
Qing Xued5b65d2011-01-20 05:19:40 -03001297 if (!ici->ops->enum_fsizes)
1298 ici->ops->enum_fsizes = default_enum_fsizes;
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -03001299
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001300 mutex_lock(&list_lock);
1301 list_for_each_entry(ix, &hosts, list) {
1302 if (ix->nr == ici->nr) {
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001303 ret = -EBUSY;
1304 goto edevreg;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001305 }
1306 }
1307
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001308 ret = v4l2_device_register(ici->v4l2_dev.dev, &ici->v4l2_dev);
1309 if (ret < 0)
1310 goto edevreg;
Guennadi Liakhovetskieff505f2009-04-24 12:55:48 -03001311
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001312 list_add_tail(&ici->list, &hosts);
1313 mutex_unlock(&list_lock);
1314
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001315 scan_add_host(ici);
1316
1317 return 0;
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001318
1319edevreg:
1320 mutex_unlock(&list_lock);
1321 return ret;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001322}
1323EXPORT_SYMBOL(soc_camera_host_register);
1324
1325/* Unregister all clients! */
1326void soc_camera_host_unregister(struct soc_camera_host *ici)
1327{
1328 struct soc_camera_device *icd;
1329
1330 mutex_lock(&list_lock);
1331
1332 list_del(&ici->list);
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -03001333 list_for_each_entry(icd, &devices, list)
1334 if (icd->iface == ici->nr && to_soc_camera_control(icd))
1335 soc_camera_remove(icd);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001336
1337 mutex_unlock(&list_lock);
1338
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001339 v4l2_device_unregister(&ici->v4l2_dev);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001340}
1341EXPORT_SYMBOL(soc_camera_host_unregister);
1342
1343/* Image capture device */
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001344static int soc_camera_device_register(struct soc_camera_device *icd)
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001345{
1346 struct soc_camera_device *ix;
1347 int num = -1, i;
1348
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001349 for (i = 0; i < 256 && num < 0; i++) {
1350 num = i;
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001351 /* Check if this index is available on this interface */
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001352 list_for_each_entry(ix, &devices, list) {
1353 if (ix->iface == icd->iface && ix->devnum == i) {
1354 num = -1;
1355 break;
1356 }
1357 }
1358 }
1359
1360 if (num < 0)
Guennadi Liakhovetski5d28d522009-12-11 11:15:05 -03001361 /*
1362 * ok, we have 256 cameras on this host...
1363 * man, stay reasonable...
1364 */
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001365 return -ENOMEM;
1366
Guennadi Liakhovetski64ff9ba2009-11-09 16:12:37 -03001367 icd->devnum = num;
Guennadi Liakhovetski64f59052008-12-18 11:51:55 -03001368 icd->use_count = 0;
1369 icd->host_priv = NULL;
Guennadi Liakhovetski1c3bb742008-12-18 12:28:54 -03001370 mutex_init(&icd->video_lock);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001371
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001372 list_add_tail(&icd->list, &devices);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001373
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001374 return 0;
1375}
1376
Hans Verkuila3998102008-07-21 02:57:38 -03001377static const struct v4l2_ioctl_ops soc_camera_ioctl_ops = {
1378 .vidioc_querycap = soc_camera_querycap,
Guennadi Liakhovetski7ae77ee2011-09-28 09:25:28 -03001379 .vidioc_try_fmt_vid_cap = soc_camera_try_fmt_vid_cap,
Hans Verkuila3998102008-07-21 02:57:38 -03001380 .vidioc_g_fmt_vid_cap = soc_camera_g_fmt_vid_cap,
Hans Verkuila3998102008-07-21 02:57:38 -03001381 .vidioc_s_fmt_vid_cap = soc_camera_s_fmt_vid_cap,
Guennadi Liakhovetski7ae77ee2011-09-28 09:25:28 -03001382 .vidioc_enum_fmt_vid_cap = soc_camera_enum_fmt_vid_cap,
Hans Verkuila3998102008-07-21 02:57:38 -03001383 .vidioc_enum_input = soc_camera_enum_input,
1384 .vidioc_g_input = soc_camera_g_input,
1385 .vidioc_s_input = soc_camera_s_input,
1386 .vidioc_s_std = soc_camera_s_std,
Guennadi Liakhovetski2f0babb2011-09-09 13:39:20 -03001387 .vidioc_g_std = soc_camera_g_std,
Qing Xued5b65d2011-01-20 05:19:40 -03001388 .vidioc_enum_framesizes = soc_camera_enum_fsizes,
Hans Verkuila3998102008-07-21 02:57:38 -03001389 .vidioc_reqbufs = soc_camera_reqbufs,
Hans Verkuila3998102008-07-21 02:57:38 -03001390 .vidioc_querybuf = soc_camera_querybuf,
1391 .vidioc_qbuf = soc_camera_qbuf,
1392 .vidioc_dqbuf = soc_camera_dqbuf,
Guennadi Liakhovetski7ae77ee2011-09-28 09:25:28 -03001393 .vidioc_create_bufs = soc_camera_create_bufs,
1394 .vidioc_prepare_buf = soc_camera_prepare_buf,
Hans Verkuila3998102008-07-21 02:57:38 -03001395 .vidioc_streamon = soc_camera_streamon,
1396 .vidioc_streamoff = soc_camera_streamoff,
Hans Verkuila3998102008-07-21 02:57:38 -03001397 .vidioc_cropcap = soc_camera_cropcap,
1398 .vidioc_g_crop = soc_camera_g_crop,
1399 .vidioc_s_crop = soc_camera_s_crop,
Guennadi Liakhovetskic9f6ef62010-02-09 18:00:30 +01001400 .vidioc_g_parm = soc_camera_g_parm,
1401 .vidioc_s_parm = soc_camera_s_parm,
Hans Verkuila3998102008-07-21 02:57:38 -03001402 .vidioc_g_chip_ident = soc_camera_g_chip_ident,
1403#ifdef CONFIG_VIDEO_ADV_DEBUG
1404 .vidioc_g_register = soc_camera_g_register,
1405 .vidioc_s_register = soc_camera_s_register,
1406#endif
1407};
1408
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001409static int video_dev_create(struct soc_camera_device *icd)
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001410{
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -03001411 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001412 struct video_device *vdev = video_device_alloc();
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001413
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001414 if (!vdev)
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001415 return -ENOMEM;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001416
1417 strlcpy(vdev->name, ici->drv_name, sizeof(vdev->name));
Guennadi Liakhovetski1c3bb742008-12-18 12:28:54 -03001418
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -03001419 vdev->parent = icd->pdev;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001420 vdev->current_norm = V4L2_STD_UNKNOWN;
1421 vdev->fops = &soc_camera_fops;
Hans Verkuila3998102008-07-21 02:57:38 -03001422 vdev->ioctl_ops = &soc_camera_ioctl_ops;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001423 vdev->release = video_device_release;
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001424 vdev->tvnorms = V4L2_STD_UNKNOWN;
Hans Verkuilee02da62011-09-06 12:36:39 -03001425 vdev->ctrl_handler = &icd->ctrl_handler;
Guennadi Liakhovetski7a05dfe2011-06-29 07:46:40 -03001426 vdev->lock = &icd->video_lock;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001427
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001428 icd->vdev = vdev;
1429
1430 return 0;
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001431}
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001432
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001433/*
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001434 * Called from soc_camera_probe() above (with .video_lock held???)
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001435 */
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001436static int soc_camera_video_start(struct soc_camera_device *icd)
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001437{
Mauro Carvalho Chehabd364ee42011-06-01 15:03:56 -03001438 const struct device_type *type = icd->vdev->dev.type;
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001439 int ret;
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001440
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -03001441 if (!icd->parent)
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001442 return -ENODEV;
1443
Laurent Pinchart46b21092009-12-10 11:51:38 -02001444 ret = video_register_device(icd->vdev, VFL_TYPE_GRABBER, -1);
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001445 if (ret < 0) {
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -03001446 dev_err(icd->pdev, "video_register_device failed: %d\n", ret);
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001447 return ret;
1448 }
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001449
Mauro Carvalho Chehab4f9fb5e2010-05-18 00:46:09 -03001450 /* Restore device type, possibly set by the subdevice driver */
1451 icd->vdev->dev.type = type;
1452
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001453 return 0;
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001454}
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001455
Guennadi Liakhovetskic41deba2009-08-25 11:06:21 -03001456static int __devinit soc_camera_pdrv_probe(struct platform_device *pdev)
1457{
1458 struct soc_camera_link *icl = pdev->dev.platform_data;
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001459 struct soc_camera_device *icd;
1460 int ret;
Guennadi Liakhovetskic41deba2009-08-25 11:06:21 -03001461
1462 if (!icl)
1463 return -EINVAL;
1464
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001465 icd = kzalloc(sizeof(*icd), GFP_KERNEL);
1466 if (!icd)
1467 return -ENOMEM;
Guennadi Liakhovetskic41deba2009-08-25 11:06:21 -03001468
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001469 icd->iface = icl->bus_id;
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -03001470 icd->link = icl;
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -03001471 icd->pdev = &pdev->dev;
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001472 platform_set_drvdata(pdev, icd);
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001473
1474 ret = soc_camera_device_register(icd);
1475 if (ret < 0)
1476 goto escdevreg;
1477
Guennadi Liakhovetski6a6c8782009-08-25 11:50:46 -03001478 icd->user_width = DEFAULT_WIDTH;
1479 icd->user_height = DEFAULT_HEIGHT;
1480
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001481 return 0;
1482
1483escdevreg:
1484 kfree(icd);
1485
1486 return ret;
Guennadi Liakhovetskic41deba2009-08-25 11:06:21 -03001487}
1488
Guennadi Liakhovetski5d28d522009-12-11 11:15:05 -03001489/*
1490 * Only called on rmmod for each platform device, since they are not
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001491 * hot-pluggable. Now we know, that all our users - hosts and devices have
Guennadi Liakhovetski5d28d522009-12-11 11:15:05 -03001492 * been unloaded already
1493 */
Guennadi Liakhovetskic41deba2009-08-25 11:06:21 -03001494static int __devexit soc_camera_pdrv_remove(struct platform_device *pdev)
1495{
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001496 struct soc_camera_device *icd = platform_get_drvdata(pdev);
Guennadi Liakhovetskic41deba2009-08-25 11:06:21 -03001497
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001498 if (!icd)
1499 return -EINVAL;
1500
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -03001501 list_del(&icd->list);
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001502
1503 kfree(icd);
1504
Guennadi Liakhovetski0fd327b2009-05-07 13:25:32 -03001505 return 0;
1506}
1507
1508static struct platform_driver __refdata soc_camera_pdrv = {
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -03001509 .remove = __devexit_p(soc_camera_pdrv_remove),
1510 .driver = {
1511 .name = "soc-camera-pdrv",
1512 .owner = THIS_MODULE,
Guennadi Liakhovetski0fd327b2009-05-07 13:25:32 -03001513 },
1514};
1515
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001516static int __init soc_camera_init(void)
1517{
Guennadi Liakhovetski7dfff952011-07-15 20:03:38 -03001518 return platform_driver_probe(&soc_camera_pdrv, soc_camera_pdrv_probe);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001519}
1520
1521static void __exit soc_camera_exit(void)
1522{
Guennadi Liakhovetski0fd327b2009-05-07 13:25:32 -03001523 platform_driver_unregister(&soc_camera_pdrv);
Guennadi Liakhovetskie55222e2008-04-22 14:42:03 -03001524}
1525
1526module_init(soc_camera_init);
1527module_exit(soc_camera_exit);
1528
1529MODULE_DESCRIPTION("Image capture bus driver");
1530MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
1531MODULE_LICENSE("GPL");
Guennadi Liakhovetski0fd327b2009-05-07 13:25:32 -03001532MODULE_ALIAS("platform:soc-camera-pdrv");