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15#include <linux/device.h>
16#include <linux/err.h>
17#include <linux/i2c.h>
18#include <linux/init.h>
19#include <linux/list.h>
20#include <linux/module.h>
21#include <linux/mutex.h>
22#include <linux/of_graph.h>
23#include <linux/platform_device.h>
24#include <linux/pm_runtime.h>
25#include <linux/regulator/consumer.h>
26#include <linux/slab.h>
27#include <linux/vmalloc.h>
28
29#include <media/soc_camera.h>
30#include <media/drv-intf/soc_mediabus.h>
31#include <media/v4l2-async.h>
32#include <media/v4l2-clk.h>
33#include <media/v4l2-common.h>
34#include <media/v4l2-ioctl.h>
35#include <media/v4l2-dev.h>
36#include <media/v4l2-fwnode.h>
37#include <media/videobuf2-v4l2.h>
38
39
40#define DEFAULT_WIDTH 640
41#define DEFAULT_HEIGHT 480
42
43#define MAP_MAX_NUM 32
44static DECLARE_BITMAP(device_map, MAP_MAX_NUM);
45static LIST_HEAD(hosts);
46static LIST_HEAD(devices);
47
48
49
50
51static DEFINE_MUTEX(list_lock);
52
53struct soc_camera_async_client {
54 struct v4l2_async_subdev *sensor;
55 struct v4l2_async_notifier notifier;
56 struct platform_device *pdev;
57 struct list_head list;
58};
59
60static int soc_camera_video_start(struct soc_camera_device *icd);
61static int video_dev_create(struct soc_camera_device *icd);
62
63int soc_camera_power_on(struct device *dev, struct soc_camera_subdev_desc *ssdd,
64 struct v4l2_clk *clk)
65{
66 int ret;
67 bool clock_toggle;
68
69 if (clk && (!ssdd->unbalanced_power ||
70 !test_and_set_bit(0, &ssdd->clock_state))) {
71 ret = v4l2_clk_enable(clk);
72 if (ret < 0) {
73 dev_err(dev, "Cannot enable clock: %d\n", ret);
74 return ret;
75 }
76 clock_toggle = true;
77 } else {
78 clock_toggle = false;
79 }
80
81 ret = regulator_bulk_enable(ssdd->sd_pdata.num_regulators,
82 ssdd->sd_pdata.regulators);
83 if (ret < 0) {
84 dev_err(dev, "Cannot enable regulators\n");
85 goto eregenable;
86 }
87
88 if (ssdd->power) {
89 ret = ssdd->power(dev, 1);
90 if (ret < 0) {
91 dev_err(dev,
92 "Platform failed to power-on the camera.\n");
93 goto epwron;
94 }
95 }
96
97 return 0;
98
99epwron:
100 regulator_bulk_disable(ssdd->sd_pdata.num_regulators,
101 ssdd->sd_pdata.regulators);
102eregenable:
103 if (clock_toggle)
104 v4l2_clk_disable(clk);
105
106 return ret;
107}
108EXPORT_SYMBOL(soc_camera_power_on);
109
110int soc_camera_power_off(struct device *dev, struct soc_camera_subdev_desc *ssdd,
111 struct v4l2_clk *clk)
112{
113 int ret = 0;
114 int err;
115
116 if (ssdd->power) {
117 err = ssdd->power(dev, 0);
118 if (err < 0) {
119 dev_err(dev,
120 "Platform failed to power-off the camera.\n");
121 ret = err;
122 }
123 }
124
125 err = regulator_bulk_disable(ssdd->sd_pdata.num_regulators,
126 ssdd->sd_pdata.regulators);
127 if (err < 0) {
128 dev_err(dev, "Cannot disable regulators\n");
129 ret = ret ? : err;
130 }
131
132 if (clk && (!ssdd->unbalanced_power || test_and_clear_bit(0, &ssdd->clock_state)))
133 v4l2_clk_disable(clk);
134
135 return ret;
136}
137EXPORT_SYMBOL(soc_camera_power_off);
138
139int soc_camera_power_init(struct device *dev, struct soc_camera_subdev_desc *ssdd)
140{
141
142 return devm_regulator_bulk_get(dev, ssdd->sd_pdata.num_regulators,
143 ssdd->sd_pdata.regulators);
144}
145EXPORT_SYMBOL(soc_camera_power_init);
146
147static int __soc_camera_power_on(struct soc_camera_device *icd)
148{
149 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
150 int ret;
151
152 ret = v4l2_subdev_call(sd, core, s_power, 1);
153 if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
154 return ret;
155
156 return 0;
157}
158
159static int __soc_camera_power_off(struct soc_camera_device *icd)
160{
161 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
162 int ret;
163
164 ret = v4l2_subdev_call(sd, core, s_power, 0);
165 if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
166 return ret;
167
168 return 0;
169}
170
171static int soc_camera_clock_start(struct soc_camera_host *ici)
172{
173 int ret;
174
175 if (!ici->ops->clock_start)
176 return 0;
177
178 mutex_lock(&ici->clk_lock);
179 ret = ici->ops->clock_start(ici);
180 mutex_unlock(&ici->clk_lock);
181
182 return ret;
183}
184
185static void soc_camera_clock_stop(struct soc_camera_host *ici)
186{
187 if (!ici->ops->clock_stop)
188 return;
189
190 mutex_lock(&ici->clk_lock);
191 ici->ops->clock_stop(ici);
192 mutex_unlock(&ici->clk_lock);
193}
194
195const struct soc_camera_format_xlate *soc_camera_xlate_by_fourcc(
196 struct soc_camera_device *icd, unsigned int fourcc)
197{
198 unsigned int i;
199
200 for (i = 0; i < icd->num_user_formats; i++)
201 if (icd->user_formats[i].host_fmt->fourcc == fourcc)
202 return icd->user_formats + i;
203 return NULL;
204}
205EXPORT_SYMBOL(soc_camera_xlate_by_fourcc);
206
207
208
209
210
211
212
213unsigned long soc_camera_apply_board_flags(struct soc_camera_subdev_desc *ssdd,
214 const struct v4l2_mbus_config *cfg)
215{
216 unsigned long f, flags = cfg->flags;
217
218
219 if (ssdd->flags & SOCAM_SENSOR_INVERT_HSYNC) {
220 f = flags & (V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW);
221 if (f == V4L2_MBUS_HSYNC_ACTIVE_HIGH || f == V4L2_MBUS_HSYNC_ACTIVE_LOW)
222 flags ^= V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW;
223 }
224
225 if (ssdd->flags & SOCAM_SENSOR_INVERT_VSYNC) {
226 f = flags & (V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW);
227 if (f == V4L2_MBUS_VSYNC_ACTIVE_HIGH || f == V4L2_MBUS_VSYNC_ACTIVE_LOW)
228 flags ^= V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW;
229 }
230
231 if (ssdd->flags & SOCAM_SENSOR_INVERT_PCLK) {
232 f = flags & (V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING);
233 if (f == V4L2_MBUS_PCLK_SAMPLE_RISING || f == V4L2_MBUS_PCLK_SAMPLE_FALLING)
234 flags ^= V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING;
235 }
236
237 return flags;
238}
239EXPORT_SYMBOL(soc_camera_apply_board_flags);
240
241#define pixfmtstr(x) (x) & 0xff, ((x) >> 8) & 0xff, ((x) >> 16) & 0xff, \
242 ((x) >> 24) & 0xff
243
244static int soc_camera_try_fmt(struct soc_camera_device *icd,
245 struct v4l2_format *f)
246{
247 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
248 const struct soc_camera_format_xlate *xlate;
249 struct v4l2_pix_format *pix = &f->fmt.pix;
250 int ret;
251
252 dev_dbg(icd->pdev, "TRY_FMT(%c%c%c%c, %ux%u)\n",
253 pixfmtstr(pix->pixelformat), pix->width, pix->height);
254
255 if (pix->pixelformat != V4L2_PIX_FMT_JPEG &&
256 !(ici->capabilities & SOCAM_HOST_CAP_STRIDE)) {
257 pix->bytesperline = 0;
258 pix->sizeimage = 0;
259 }
260
261 ret = ici->ops->try_fmt(icd, f);
262 if (ret < 0)
263 return ret;
264
265 xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat);
266 if (!xlate)
267 return -EINVAL;
268
269 ret = soc_mbus_bytes_per_line(pix->width, xlate->host_fmt);
270 if (ret < 0)
271 return ret;
272
273 pix->bytesperline = max_t(u32, pix->bytesperline, ret);
274
275 ret = soc_mbus_image_size(xlate->host_fmt, pix->bytesperline,
276 pix->height);
277 if (ret < 0)
278 return ret;
279
280 pix->sizeimage = max_t(u32, pix->sizeimage, ret);
281
282 return 0;
283}
284
285static int soc_camera_try_fmt_vid_cap(struct file *file, void *priv,
286 struct v4l2_format *f)
287{
288 struct soc_camera_device *icd = file->private_data;
289
290 WARN_ON(priv != file->private_data);
291
292
293 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
294 return -EINVAL;
295
296
297 return soc_camera_try_fmt(icd, f);
298}
299
300static int soc_camera_enum_input(struct file *file, void *priv,
301 struct v4l2_input *inp)
302{
303 struct soc_camera_device *icd = file->private_data;
304
305 if (inp->index != 0)
306 return -EINVAL;
307
308
309 inp->type = V4L2_INPUT_TYPE_CAMERA;
310 inp->std = icd->vdev->tvnorms;
311 strscpy(inp->name, "Camera", sizeof(inp->name));
312
313 return 0;
314}
315
316static int soc_camera_g_input(struct file *file, void *priv, unsigned int *i)
317{
318 *i = 0;
319
320 return 0;
321}
322
323static int soc_camera_s_input(struct file *file, void *priv, unsigned int i)
324{
325 if (i > 0)
326 return -EINVAL;
327
328 return 0;
329}
330
331static int soc_camera_s_std(struct file *file, void *priv, v4l2_std_id a)
332{
333 struct soc_camera_device *icd = file->private_data;
334 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
335
336 return v4l2_subdev_call(sd, video, s_std, a);
337}
338
339static int soc_camera_g_std(struct file *file, void *priv, v4l2_std_id *a)
340{
341 struct soc_camera_device *icd = file->private_data;
342 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
343
344 return v4l2_subdev_call(sd, video, g_std, a);
345}
346
347static int soc_camera_enum_framesizes(struct file *file, void *fh,
348 struct v4l2_frmsizeenum *fsize)
349{
350 struct soc_camera_device *icd = file->private_data;
351 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
352
353 return ici->ops->enum_framesizes(icd, fsize);
354}
355
356static int soc_camera_reqbufs(struct file *file, void *priv,
357 struct v4l2_requestbuffers *p)
358{
359 int ret;
360 struct soc_camera_device *icd = file->private_data;
361
362 WARN_ON(priv != file->private_data);
363
364 if (icd->streamer && icd->streamer != file)
365 return -EBUSY;
366
367 ret = vb2_reqbufs(&icd->vb2_vidq, p);
368 if (!ret)
369 icd->streamer = p->count ? file : NULL;
370 return ret;
371}
372
373static int soc_camera_querybuf(struct file *file, void *priv,
374 struct v4l2_buffer *p)
375{
376 struct soc_camera_device *icd = file->private_data;
377
378 WARN_ON(priv != file->private_data);
379
380 return vb2_querybuf(&icd->vb2_vidq, p);
381}
382
383static int soc_camera_qbuf(struct file *file, void *priv,
384 struct v4l2_buffer *p)
385{
386 struct soc_camera_device *icd = file->private_data;
387
388 WARN_ON(priv != file->private_data);
389
390 if (icd->streamer != file)
391 return -EBUSY;
392
393 return vb2_qbuf(&icd->vb2_vidq, NULL, p);
394}
395
396static int soc_camera_dqbuf(struct file *file, void *priv,
397 struct v4l2_buffer *p)
398{
399 struct soc_camera_device *icd = file->private_data;
400
401 WARN_ON(priv != file->private_data);
402
403 if (icd->streamer != file)
404 return -EBUSY;
405
406 return vb2_dqbuf(&icd->vb2_vidq, p, file->f_flags & O_NONBLOCK);
407}
408
409static int soc_camera_create_bufs(struct file *file, void *priv,
410 struct v4l2_create_buffers *create)
411{
412 struct soc_camera_device *icd = file->private_data;
413 int ret;
414
415 if (icd->streamer && icd->streamer != file)
416 return -EBUSY;
417
418 ret = vb2_create_bufs(&icd->vb2_vidq, create);
419 if (!ret)
420 icd->streamer = file;
421 return ret;
422}
423
424static int soc_camera_prepare_buf(struct file *file, void *priv,
425 struct v4l2_buffer *b)
426{
427 struct soc_camera_device *icd = file->private_data;
428
429 return vb2_prepare_buf(&icd->vb2_vidq, NULL, b);
430}
431
432static int soc_camera_expbuf(struct file *file, void *priv,
433 struct v4l2_exportbuffer *p)
434{
435 struct soc_camera_device *icd = file->private_data;
436
437 if (icd->streamer && icd->streamer != file)
438 return -EBUSY;
439 return vb2_expbuf(&icd->vb2_vidq, p);
440}
441
442
443static int soc_camera_init_user_formats(struct soc_camera_device *icd)
444{
445 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
446 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
447 unsigned int i, fmts = 0, raw_fmts = 0;
448 int ret;
449 struct v4l2_subdev_mbus_code_enum code = {
450 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
451 };
452
453 while (!v4l2_subdev_call(sd, pad, enum_mbus_code, NULL, &code)) {
454 raw_fmts++;
455 code.index++;
456 }
457
458 if (!ici->ops->get_formats)
459
460
461
462
463 fmts = raw_fmts;
464 else
465
466
467
468
469 for (i = 0; i < raw_fmts; i++) {
470 ret = ici->ops->get_formats(icd, i, NULL);
471 if (ret < 0)
472 return ret;
473 fmts += ret;
474 }
475
476 if (!fmts)
477 return -ENXIO;
478
479 icd->user_formats =
480 vmalloc(array_size(fmts,
481 sizeof(struct soc_camera_format_xlate)));
482 if (!icd->user_formats)
483 return -ENOMEM;
484
485 dev_dbg(icd->pdev, "Found %d supported formats.\n", fmts);
486
487
488 fmts = 0;
489 for (i = 0; i < raw_fmts; i++)
490 if (!ici->ops->get_formats) {
491 code.index = i;
492 v4l2_subdev_call(sd, pad, enum_mbus_code, NULL, &code);
493 icd->user_formats[fmts].host_fmt =
494 soc_mbus_get_fmtdesc(code.code);
495 if (icd->user_formats[fmts].host_fmt)
496 icd->user_formats[fmts++].code = code.code;
497 } else {
498 ret = ici->ops->get_formats(icd, i,
499 &icd->user_formats[fmts]);
500 if (ret < 0)
501 goto egfmt;
502 fmts += ret;
503 }
504
505 icd->num_user_formats = fmts;
506 icd->current_fmt = &icd->user_formats[0];
507
508 return 0;
509
510egfmt:
511 vfree(icd->user_formats);
512 return ret;
513}
514
515
516static void soc_camera_free_user_formats(struct soc_camera_device *icd)
517{
518 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
519
520 if (ici->ops->put_formats)
521 ici->ops->put_formats(icd);
522 icd->current_fmt = NULL;
523 icd->num_user_formats = 0;
524 vfree(icd->user_formats);
525 icd->user_formats = NULL;
526}
527
528
529static int soc_camera_set_fmt(struct soc_camera_device *icd,
530 struct v4l2_format *f)
531{
532 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
533 struct v4l2_pix_format *pix = &f->fmt.pix;
534 int ret;
535
536 dev_dbg(icd->pdev, "S_FMT(%c%c%c%c, %ux%u)\n",
537 pixfmtstr(pix->pixelformat), pix->width, pix->height);
538
539
540 ret = soc_camera_try_fmt(icd, f);
541 if (ret < 0)
542 return ret;
543
544 ret = ici->ops->set_fmt(icd, f);
545 if (ret < 0) {
546 return ret;
547 } else if (!icd->current_fmt ||
548 icd->current_fmt->host_fmt->fourcc != pix->pixelformat) {
549 dev_err(icd->pdev,
550 "Host driver hasn't set up current format correctly!\n");
551 return -EINVAL;
552 }
553
554 icd->user_width = pix->width;
555 icd->user_height = pix->height;
556 icd->bytesperline = pix->bytesperline;
557 icd->sizeimage = pix->sizeimage;
558 icd->colorspace = pix->colorspace;
559 icd->field = pix->field;
560
561 dev_dbg(icd->pdev, "set width: %d height: %d\n",
562 icd->user_width, icd->user_height);
563
564
565 return ici->ops->set_bus_param(icd);
566}
567
568static int soc_camera_add_device(struct soc_camera_device *icd)
569{
570 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
571 int ret;
572
573 if (ici->icd)
574 return -EBUSY;
575
576 if (!icd->clk) {
577 ret = soc_camera_clock_start(ici);
578 if (ret < 0)
579 return ret;
580 }
581
582 if (ici->ops->add) {
583 ret = ici->ops->add(icd);
584 if (ret < 0)
585 goto eadd;
586 }
587
588 ici->icd = icd;
589
590 return 0;
591
592eadd:
593 if (!icd->clk)
594 soc_camera_clock_stop(ici);
595 return ret;
596}
597
598static void soc_camera_remove_device(struct soc_camera_device *icd)
599{
600 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
601
602 if (WARN_ON(icd != ici->icd))
603 return;
604
605 if (ici->ops->remove)
606 ici->ops->remove(icd);
607 if (!icd->clk)
608 soc_camera_clock_stop(ici);
609 ici->icd = NULL;
610}
611
612static int soc_camera_open(struct file *file)
613{
614 struct video_device *vdev = video_devdata(file);
615 struct soc_camera_device *icd;
616 struct soc_camera_host *ici;
617 int ret;
618
619
620
621
622
623
624 if (mutex_lock_interruptible(&list_lock))
625 return -ERESTARTSYS;
626
627 if (!vdev || !video_is_registered(vdev)) {
628 mutex_unlock(&list_lock);
629 return -ENODEV;
630 }
631
632 icd = video_get_drvdata(vdev);
633 ici = to_soc_camera_host(icd->parent);
634
635 ret = try_module_get(ici->ops->owner) ? 0 : -ENODEV;
636 mutex_unlock(&list_lock);
637
638 if (ret < 0) {
639 dev_err(icd->pdev, "Couldn't lock capture bus driver.\n");
640 return ret;
641 }
642
643 if (!to_soc_camera_control(icd)) {
644
645 ret = -ENODEV;
646 goto econtrol;
647 }
648
649 if (mutex_lock_interruptible(&ici->host_lock)) {
650 ret = -ERESTARTSYS;
651 goto elockhost;
652 }
653 icd->use_count++;
654
655
656 if (icd->use_count == 1) {
657 struct soc_camera_desc *sdesc = to_soc_camera_desc(icd);
658
659 struct v4l2_format f = {
660 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
661 .fmt.pix = {
662 .width = icd->user_width,
663 .height = icd->user_height,
664 .field = icd->field,
665 .colorspace = icd->colorspace,
666 .pixelformat =
667 icd->current_fmt->host_fmt->fourcc,
668 },
669 };
670
671
672 if (sdesc->subdev_desc.reset)
673 if (icd->control)
674 sdesc->subdev_desc.reset(icd->control);
675
676 ret = soc_camera_add_device(icd);
677 if (ret < 0) {
678 dev_err(icd->pdev, "Couldn't activate the camera: %d\n", ret);
679 goto eiciadd;
680 }
681
682 ret = __soc_camera_power_on(icd);
683 if (ret < 0)
684 goto epower;
685
686 pm_runtime_enable(&icd->vdev->dev);
687 ret = pm_runtime_resume(&icd->vdev->dev);
688 if (ret < 0 && ret != -ENOSYS)
689 goto eresume;
690
691
692
693
694
695
696
697 ret = soc_camera_set_fmt(icd, &f);
698 if (ret < 0)
699 goto esfmt;
700
701 ret = ici->ops->init_videobuf2(&icd->vb2_vidq, icd);
702 if (ret < 0)
703 goto einitvb;
704 v4l2_ctrl_handler_setup(&icd->ctrl_handler);
705 }
706 mutex_unlock(&ici->host_lock);
707
708 file->private_data = icd;
709 dev_dbg(icd->pdev, "camera device open\n");
710
711 return 0;
712
713
714
715
716
717einitvb:
718esfmt:
719 pm_runtime_disable(&icd->vdev->dev);
720eresume:
721 __soc_camera_power_off(icd);
722epower:
723 soc_camera_remove_device(icd);
724eiciadd:
725 icd->use_count--;
726 mutex_unlock(&ici->host_lock);
727elockhost:
728econtrol:
729 module_put(ici->ops->owner);
730
731 return ret;
732}
733
734static int soc_camera_close(struct file *file)
735{
736 struct soc_camera_device *icd = file->private_data;
737 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
738
739 mutex_lock(&ici->host_lock);
740 if (icd->streamer == file) {
741 if (ici->ops->init_videobuf2)
742 vb2_queue_release(&icd->vb2_vidq);
743 icd->streamer = NULL;
744 }
745 icd->use_count--;
746 if (!icd->use_count) {
747 pm_runtime_suspend(&icd->vdev->dev);
748 pm_runtime_disable(&icd->vdev->dev);
749
750 __soc_camera_power_off(icd);
751
752 soc_camera_remove_device(icd);
753 }
754
755 mutex_unlock(&ici->host_lock);
756
757 module_put(ici->ops->owner);
758
759 dev_dbg(icd->pdev, "camera device close\n");
760
761 return 0;
762}
763
764static ssize_t soc_camera_read(struct file *file, char __user *buf,
765 size_t count, loff_t *ppos)
766{
767 struct soc_camera_device *icd = file->private_data;
768 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
769
770 dev_dbg(icd->pdev, "read called, buf %p\n", buf);
771
772 if (ici->ops->init_videobuf2 && icd->vb2_vidq.io_modes & VB2_READ)
773 return vb2_read(&icd->vb2_vidq, buf, count, ppos,
774 file->f_flags & O_NONBLOCK);
775
776 dev_err(icd->pdev, "camera device read not implemented\n");
777
778 return -EINVAL;
779}
780
781static int soc_camera_mmap(struct file *file, struct vm_area_struct *vma)
782{
783 struct soc_camera_device *icd = file->private_data;
784 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
785 int err;
786
787 dev_dbg(icd->pdev, "mmap called, vma=%p\n", vma);
788
789 if (icd->streamer != file)
790 return -EBUSY;
791
792 if (mutex_lock_interruptible(&ici->host_lock))
793 return -ERESTARTSYS;
794 err = vb2_mmap(&icd->vb2_vidq, vma);
795 mutex_unlock(&ici->host_lock);
796
797 dev_dbg(icd->pdev, "vma start=0x%08lx, size=%ld, ret=%d\n",
798 (unsigned long)vma->vm_start,
799 (unsigned long)vma->vm_end - (unsigned long)vma->vm_start,
800 err);
801
802 return err;
803}
804
805static __poll_t soc_camera_poll(struct file *file, poll_table *pt)
806{
807 struct soc_camera_device *icd = file->private_data;
808 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
809 __poll_t res = EPOLLERR;
810
811 if (icd->streamer != file)
812 return EPOLLERR;
813
814 mutex_lock(&ici->host_lock);
815 res = ici->ops->poll(file, pt);
816 mutex_unlock(&ici->host_lock);
817 return res;
818}
819
820static const struct v4l2_file_operations soc_camera_fops = {
821 .owner = THIS_MODULE,
822 .open = soc_camera_open,
823 .release = soc_camera_close,
824 .unlocked_ioctl = video_ioctl2,
825 .read = soc_camera_read,
826 .mmap = soc_camera_mmap,
827 .poll = soc_camera_poll,
828};
829
830static int soc_camera_s_fmt_vid_cap(struct file *file, void *priv,
831 struct v4l2_format *f)
832{
833 struct soc_camera_device *icd = file->private_data;
834 int ret;
835
836 WARN_ON(priv != file->private_data);
837
838 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
839 dev_warn(icd->pdev, "Wrong buf-type %d\n", f->type);
840 return -EINVAL;
841 }
842
843 if (icd->streamer && icd->streamer != file)
844 return -EBUSY;
845
846 if (vb2_is_streaming(&icd->vb2_vidq)) {
847 dev_err(icd->pdev, "S_FMT denied: queue initialised\n");
848 return -EBUSY;
849 }
850
851 ret = soc_camera_set_fmt(icd, f);
852
853 if (!ret && !icd->streamer)
854 icd->streamer = file;
855
856 return ret;
857}
858
859static int soc_camera_enum_fmt_vid_cap(struct file *file, void *priv,
860 struct v4l2_fmtdesc *f)
861{
862 struct soc_camera_device *icd = file->private_data;
863 const struct soc_mbus_pixelfmt *format;
864
865 WARN_ON(priv != file->private_data);
866
867 if (f->index >= icd->num_user_formats)
868 return -EINVAL;
869
870 format = icd->user_formats[f->index].host_fmt;
871
872 if (format->name)
873 strscpy(f->description, format->name, sizeof(f->description));
874 f->pixelformat = format->fourcc;
875 return 0;
876}
877
878static int soc_camera_g_fmt_vid_cap(struct file *file, void *priv,
879 struct v4l2_format *f)
880{
881 struct soc_camera_device *icd = file->private_data;
882 struct v4l2_pix_format *pix = &f->fmt.pix;
883
884 WARN_ON(priv != file->private_data);
885
886 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
887 return -EINVAL;
888
889 pix->width = icd->user_width;
890 pix->height = icd->user_height;
891 pix->bytesperline = icd->bytesperline;
892 pix->sizeimage = icd->sizeimage;
893 pix->field = icd->field;
894 pix->pixelformat = icd->current_fmt->host_fmt->fourcc;
895 pix->colorspace = icd->colorspace;
896 dev_dbg(icd->pdev, "current_fmt->fourcc: 0x%08x\n",
897 icd->current_fmt->host_fmt->fourcc);
898 return 0;
899}
900
901static int soc_camera_querycap(struct file *file, void *priv,
902 struct v4l2_capability *cap)
903{
904 struct soc_camera_device *icd = file->private_data;
905 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
906
907 WARN_ON(priv != file->private_data);
908
909 strscpy(cap->driver, ici->drv_name, sizeof(cap->driver));
910 return ici->ops->querycap(ici, cap);
911}
912
913static int soc_camera_streamon(struct file *file, void *priv,
914 enum v4l2_buf_type i)
915{
916 struct soc_camera_device *icd = file->private_data;
917 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
918 int ret;
919
920 WARN_ON(priv != file->private_data);
921
922 if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE)
923 return -EINVAL;
924
925 if (icd->streamer != file)
926 return -EBUSY;
927
928
929 ret = vb2_streamon(&icd->vb2_vidq, i);
930 if (!ret)
931 v4l2_subdev_call(sd, video, s_stream, 1);
932
933 return ret;
934}
935
936static int soc_camera_streamoff(struct file *file, void *priv,
937 enum v4l2_buf_type i)
938{
939 struct soc_camera_device *icd = file->private_data;
940 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
941 int ret;
942
943 WARN_ON(priv != file->private_data);
944
945 if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE)
946 return -EINVAL;
947
948 if (icd->streamer != file)
949 return -EBUSY;
950
951
952
953
954
955 ret = vb2_streamoff(&icd->vb2_vidq, i);
956
957 v4l2_subdev_call(sd, video, s_stream, 0);
958
959 return ret;
960}
961
962static int soc_camera_g_selection(struct file *file, void *fh,
963 struct v4l2_selection *s)
964{
965 struct soc_camera_device *icd = file->private_data;
966 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
967
968
969 if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
970 return -EINVAL;
971
972 return ici->ops->get_selection(icd, s);
973}
974
975static int soc_camera_s_selection(struct file *file, void *fh,
976 struct v4l2_selection *s)
977{
978 struct soc_camera_device *icd = file->private_data;
979 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
980 int ret;
981
982
983 if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
984 (s->target != V4L2_SEL_TGT_COMPOSE &&
985 s->target != V4L2_SEL_TGT_CROP))
986 return -EINVAL;
987
988 if (s->target == V4L2_SEL_TGT_COMPOSE) {
989
990 if (vb2_is_streaming(&icd->vb2_vidq) &&
991 (icd->user_width != s->r.width ||
992 icd->user_height != s->r.height))
993 return -EBUSY;
994
995
996
997
998
999 if (icd->streamer && icd->streamer != file)
1000 return -EBUSY;
1001 }
1002
1003 if (s->target == V4L2_SEL_TGT_CROP &&
1004 vb2_is_streaming(&icd->vb2_vidq) &&
1005 ici->ops->set_liveselection)
1006 ret = ici->ops->set_liveselection(icd, s);
1007 else
1008 ret = ici->ops->set_selection(icd, s);
1009 if (!ret &&
1010 s->target == V4L2_SEL_TGT_COMPOSE) {
1011 icd->user_width = s->r.width;
1012 icd->user_height = s->r.height;
1013 if (!icd->streamer)
1014 icd->streamer = file;
1015 }
1016
1017 return ret;
1018}
1019
1020static int soc_camera_g_parm(struct file *file, void *fh,
1021 struct v4l2_streamparm *a)
1022{
1023 struct soc_camera_device *icd = file->private_data;
1024 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1025
1026 if (ici->ops->get_parm)
1027 return ici->ops->get_parm(icd, a);
1028
1029 return -ENOIOCTLCMD;
1030}
1031
1032static int soc_camera_s_parm(struct file *file, void *fh,
1033 struct v4l2_streamparm *a)
1034{
1035 struct soc_camera_device *icd = file->private_data;
1036 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1037
1038 if (ici->ops->set_parm)
1039 return ici->ops->set_parm(icd, a);
1040
1041 return -ENOIOCTLCMD;
1042}
1043
1044static int soc_camera_probe(struct soc_camera_host *ici,
1045 struct soc_camera_device *icd);
1046
1047
1048static void scan_add_host(struct soc_camera_host *ici)
1049{
1050 struct soc_camera_device *icd;
1051
1052 mutex_lock(&list_lock);
1053
1054 list_for_each_entry(icd, &devices, list)
1055 if (icd->iface == ici->nr) {
1056 struct soc_camera_desc *sdesc = to_soc_camera_desc(icd);
1057 struct soc_camera_subdev_desc *ssdd = &sdesc->subdev_desc;
1058
1059
1060 if (ssdd->reset)
1061 if (icd->control)
1062 ssdd->reset(icd->control);
1063
1064 icd->parent = ici->v4l2_dev.dev;
1065
1066
1067 soc_camera_probe(ici, icd);
1068 }
1069
1070 mutex_unlock(&list_lock);
1071}
1072
1073
1074
1075
1076
1077static int soc_camera_clk_enable(struct v4l2_clk *clk)
1078{
1079 struct soc_camera_device *icd = clk->priv;
1080 struct soc_camera_host *ici;
1081
1082 if (!icd || !icd->parent)
1083 return -ENODEV;
1084
1085 ici = to_soc_camera_host(icd->parent);
1086
1087 if (!try_module_get(ici->ops->owner))
1088 return -ENODEV;
1089
1090
1091
1092
1093
1094 return soc_camera_clock_start(ici);
1095}
1096
1097static void soc_camera_clk_disable(struct v4l2_clk *clk)
1098{
1099 struct soc_camera_device *icd = clk->priv;
1100 struct soc_camera_host *ici;
1101
1102 if (!icd || !icd->parent)
1103 return;
1104
1105 ici = to_soc_camera_host(icd->parent);
1106
1107 soc_camera_clock_stop(ici);
1108
1109 module_put(ici->ops->owner);
1110}
1111
1112
1113
1114
1115
1116
1117
1118static const struct v4l2_clk_ops soc_camera_clk_ops = {
1119 .owner = THIS_MODULE,
1120 .enable = soc_camera_clk_enable,
1121 .disable = soc_camera_clk_disable,
1122};
1123
1124static int soc_camera_dyn_pdev(struct soc_camera_desc *sdesc,
1125 struct soc_camera_async_client *sasc)
1126{
1127 struct platform_device *pdev;
1128 int ret, i;
1129
1130 mutex_lock(&list_lock);
1131 i = find_first_zero_bit(device_map, MAP_MAX_NUM);
1132 if (i < MAP_MAX_NUM)
1133 set_bit(i, device_map);
1134 mutex_unlock(&list_lock);
1135 if (i >= MAP_MAX_NUM)
1136 return -ENOMEM;
1137
1138 pdev = platform_device_alloc("soc-camera-pdrv", i);
1139 if (!pdev)
1140 return -ENOMEM;
1141
1142 ret = platform_device_add_data(pdev, sdesc, sizeof(*sdesc));
1143 if (ret < 0) {
1144 platform_device_put(pdev);
1145 return ret;
1146 }
1147
1148 sasc->pdev = pdev;
1149
1150 return 0;
1151}
1152
1153static struct soc_camera_device *soc_camera_add_pdev(struct soc_camera_async_client *sasc)
1154{
1155 struct platform_device *pdev = sasc->pdev;
1156 int ret;
1157
1158 ret = platform_device_add(pdev);
1159 if (ret < 0 || !pdev->dev.driver)
1160 return NULL;
1161
1162 return platform_get_drvdata(pdev);
1163}
1164
1165
1166static int soc_camera_probe_finish(struct soc_camera_device *icd)
1167{
1168 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1169 struct v4l2_subdev_format fmt = {
1170 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
1171 };
1172 struct v4l2_mbus_framefmt *mf = &fmt.format;
1173 int ret;
1174
1175 sd->grp_id = soc_camera_grp_id(icd);
1176 v4l2_set_subdev_hostdata(sd, icd);
1177
1178 v4l2_subdev_call(sd, video, g_tvnorms, &icd->vdev->tvnorms);
1179
1180 ret = v4l2_ctrl_add_handler(&icd->ctrl_handler, sd->ctrl_handler,
1181 NULL, true);
1182 if (ret < 0)
1183 return ret;
1184
1185 ret = soc_camera_add_device(icd);
1186 if (ret < 0) {
1187 dev_err(icd->pdev, "Couldn't activate the camera: %d\n", ret);
1188 return ret;
1189 }
1190
1191
1192 ret = soc_camera_init_user_formats(icd);
1193 if (ret < 0)
1194 goto eusrfmt;
1195
1196 icd->field = V4L2_FIELD_ANY;
1197
1198 ret = soc_camera_video_start(icd);
1199 if (ret < 0)
1200 goto evidstart;
1201
1202
1203 if (!v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt)) {
1204 icd->user_width = mf->width;
1205 icd->user_height = mf->height;
1206 icd->colorspace = mf->colorspace;
1207 icd->field = mf->field;
1208 }
1209 soc_camera_remove_device(icd);
1210
1211 return 0;
1212
1213evidstart:
1214 soc_camera_free_user_formats(icd);
1215eusrfmt:
1216 soc_camera_remove_device(icd);
1217
1218 return ret;
1219}
1220
1221#ifdef CONFIG_I2C_BOARDINFO
1222static int soc_camera_i2c_init(struct soc_camera_device *icd,
1223 struct soc_camera_desc *sdesc)
1224{
1225 struct soc_camera_subdev_desc *ssdd;
1226 struct i2c_client *client;
1227 struct soc_camera_host *ici;
1228 struct soc_camera_host_desc *shd = &sdesc->host_desc;
1229 struct i2c_adapter *adap;
1230 struct v4l2_subdev *subdev;
1231 char clk_name[V4L2_CLK_NAME_SIZE];
1232 int ret;
1233
1234
1235 if (icd->sasc) {
1236
1237 return -EPROBE_DEFER;
1238 }
1239
1240 ici = to_soc_camera_host(icd->parent);
1241 adap = i2c_get_adapter(shd->i2c_adapter_id);
1242 if (!adap) {
1243 dev_err(icd->pdev, "Cannot get I2C adapter #%d. No driver?\n",
1244 shd->i2c_adapter_id);
1245 return -ENODEV;
1246 }
1247
1248 ssdd = kmemdup(&sdesc->subdev_desc, sizeof(*ssdd), GFP_KERNEL);
1249 if (!ssdd) {
1250 ret = -ENOMEM;
1251 goto ealloc;
1252 }
1253
1254
1255
1256
1257
1258 ssdd->sd_pdata.num_regulators = 0;
1259 ssdd->sd_pdata.regulators = NULL;
1260 shd->board_info->platform_data = ssdd;
1261
1262 v4l2_clk_name_i2c(clk_name, sizeof(clk_name),
1263 shd->i2c_adapter_id, shd->board_info->addr);
1264
1265 icd->clk = v4l2_clk_register(&soc_camera_clk_ops, clk_name, icd);
1266 if (IS_ERR(icd->clk)) {
1267 ret = PTR_ERR(icd->clk);
1268 goto eclkreg;
1269 }
1270
1271 subdev = v4l2_i2c_new_subdev_board(&ici->v4l2_dev, adap,
1272 shd->board_info, NULL);
1273 if (!subdev) {
1274 ret = -ENODEV;
1275 goto ei2cnd;
1276 }
1277
1278 client = v4l2_get_subdevdata(subdev);
1279
1280
1281 icd->control = &client->dev;
1282
1283 return 0;
1284ei2cnd:
1285 v4l2_clk_unregister(icd->clk);
1286 icd->clk = NULL;
1287eclkreg:
1288 kfree(ssdd);
1289ealloc:
1290 i2c_put_adapter(adap);
1291 return ret;
1292}
1293
1294static void soc_camera_i2c_free(struct soc_camera_device *icd)
1295{
1296 struct i2c_client *client =
1297 to_i2c_client(to_soc_camera_control(icd));
1298 struct i2c_adapter *adap;
1299 struct soc_camera_subdev_desc *ssdd;
1300
1301 icd->control = NULL;
1302 if (icd->sasc)
1303 return;
1304
1305 adap = client->adapter;
1306 ssdd = client->dev.platform_data;
1307 v4l2_device_unregister_subdev(i2c_get_clientdata(client));
1308 i2c_unregister_device(client);
1309 i2c_put_adapter(adap);
1310 kfree(ssdd);
1311 v4l2_clk_unregister(icd->clk);
1312 icd->clk = NULL;
1313}
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323static int soc_camera_async_bound(struct v4l2_async_notifier *notifier,
1324 struct v4l2_subdev *sd,
1325 struct v4l2_async_subdev *asd)
1326{
1327 struct soc_camera_async_client *sasc = container_of(notifier,
1328 struct soc_camera_async_client, notifier);
1329 struct soc_camera_device *icd = platform_get_drvdata(sasc->pdev);
1330
1331 if (asd == sasc->sensor && !WARN_ON(icd->control)) {
1332 struct i2c_client *client = v4l2_get_subdevdata(sd);
1333
1334
1335
1336
1337
1338 if (client) {
1339 struct soc_camera_desc *sdesc = to_soc_camera_desc(icd);
1340 struct soc_camera_subdev_desc *ssdd =
1341 soc_camera_i2c_to_desc(client);
1342 if (ssdd) {
1343 memcpy(&sdesc->subdev_desc, ssdd,
1344 sizeof(sdesc->subdev_desc));
1345 if (ssdd->reset)
1346 ssdd->reset(&client->dev);
1347 }
1348
1349 icd->control = &client->dev;
1350 }
1351 }
1352
1353 return 0;
1354}
1355
1356static void soc_camera_async_unbind(struct v4l2_async_notifier *notifier,
1357 struct v4l2_subdev *sd,
1358 struct v4l2_async_subdev *asd)
1359{
1360 struct soc_camera_async_client *sasc = container_of(notifier,
1361 struct soc_camera_async_client, notifier);
1362 struct soc_camera_device *icd = platform_get_drvdata(sasc->pdev);
1363
1364 icd->control = NULL;
1365
1366 if (icd->clk) {
1367 v4l2_clk_unregister(icd->clk);
1368 icd->clk = NULL;
1369 }
1370}
1371
1372static int soc_camera_async_complete(struct v4l2_async_notifier *notifier)
1373{
1374 struct soc_camera_async_client *sasc = container_of(notifier,
1375 struct soc_camera_async_client, notifier);
1376 struct soc_camera_device *icd = platform_get_drvdata(sasc->pdev);
1377
1378 if (to_soc_camera_control(icd)) {
1379 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1380 int ret;
1381
1382 mutex_lock(&list_lock);
1383 ret = soc_camera_probe(ici, icd);
1384 mutex_unlock(&list_lock);
1385 if (ret < 0)
1386 return ret;
1387 }
1388
1389 return 0;
1390}
1391
1392static const struct v4l2_async_notifier_operations soc_camera_async_ops = {
1393 .bound = soc_camera_async_bound,
1394 .unbind = soc_camera_async_unbind,
1395 .complete = soc_camera_async_complete,
1396};
1397
1398static int scan_async_group(struct soc_camera_host *ici,
1399 struct v4l2_async_subdev **asd, unsigned int size)
1400{
1401 struct soc_camera_async_subdev *sasd;
1402 struct soc_camera_async_client *sasc;
1403 struct soc_camera_device *icd;
1404 struct soc_camera_desc sdesc = {.host_desc.bus_id = ici->nr,};
1405 char clk_name[V4L2_CLK_NAME_SIZE];
1406 unsigned int i;
1407 int ret;
1408
1409
1410 for (i = 0; i < size; i++) {
1411 sasd = container_of(asd[i], struct soc_camera_async_subdev, asd);
1412 if (sasd->role == SOCAM_SUBDEV_DATA_SOURCE)
1413 break;
1414 }
1415
1416 if (i >= size || asd[i]->match_type != V4L2_ASYNC_MATCH_I2C) {
1417
1418 dev_err(ici->v4l2_dev.dev, "No I2C data source found!\n");
1419 return -ENODEV;
1420 }
1421
1422
1423 sasc = devm_kzalloc(ici->v4l2_dev.dev, sizeof(*sasc), GFP_KERNEL);
1424 if (!sasc)
1425 return -ENOMEM;
1426
1427
1428 sdesc.host_desc.board_info = ERR_PTR(-ENODATA);
1429
1430 ret = soc_camera_dyn_pdev(&sdesc, sasc);
1431 if (ret < 0)
1432 goto eallocpdev;
1433
1434 sasc->sensor = &sasd->asd;
1435
1436 icd = soc_camera_add_pdev(sasc);
1437 if (!icd) {
1438 ret = -ENOMEM;
1439 goto eaddpdev;
1440 }
1441
1442 v4l2_async_notifier_init(&sasc->notifier);
1443
1444 for (i = 0; i < size; i++) {
1445 ret = v4l2_async_notifier_add_subdev(&sasc->notifier, asd[i]);
1446 if (ret)
1447 goto eaddasd;
1448 }
1449
1450 sasc->notifier.ops = &soc_camera_async_ops;
1451
1452 icd->sasc = sasc;
1453 icd->parent = ici->v4l2_dev.dev;
1454
1455 v4l2_clk_name_i2c(clk_name, sizeof(clk_name),
1456 sasd->asd.match.i2c.adapter_id,
1457 sasd->asd.match.i2c.address);
1458
1459 icd->clk = v4l2_clk_register(&soc_camera_clk_ops, clk_name, icd);
1460 if (IS_ERR(icd->clk)) {
1461 ret = PTR_ERR(icd->clk);
1462 goto eclkreg;
1463 }
1464
1465 ret = v4l2_async_notifier_register(&ici->v4l2_dev, &sasc->notifier);
1466 if (!ret)
1467 return 0;
1468
1469 v4l2_clk_unregister(icd->clk);
1470eclkreg:
1471 icd->clk = NULL;
1472eaddasd:
1473 v4l2_async_notifier_cleanup(&sasc->notifier);
1474 platform_device_del(sasc->pdev);
1475eaddpdev:
1476 platform_device_put(sasc->pdev);
1477eallocpdev:
1478 devm_kfree(ici->v4l2_dev.dev, sasc);
1479 dev_err(ici->v4l2_dev.dev, "group probe failed: %d\n", ret);
1480
1481 return ret;
1482}
1483
1484static void scan_async_host(struct soc_camera_host *ici)
1485{
1486 struct v4l2_async_subdev **asd;
1487 int j;
1488
1489 for (j = 0, asd = ici->asd; ici->asd_sizes[j]; j++) {
1490 scan_async_group(ici, asd, ici->asd_sizes[j]);
1491 asd += ici->asd_sizes[j];
1492 }
1493}
1494#else
1495#define soc_camera_i2c_init(icd, sdesc) (-ENODEV)
1496#define soc_camera_i2c_free(icd) do {} while (0)
1497#define scan_async_host(ici) do {} while (0)
1498#endif
1499
1500#ifdef CONFIG_OF
1501
1502struct soc_of_info {
1503 struct soc_camera_async_subdev sasd;
1504 struct soc_camera_async_client sasc;
1505 struct v4l2_async_subdev *subdev;
1506};
1507
1508static int soc_of_bind(struct soc_camera_host *ici,
1509 struct device_node *ep,
1510 struct device_node *remote)
1511{
1512 struct soc_camera_device *icd;
1513 struct soc_camera_desc sdesc = {.host_desc.bus_id = ici->nr,};
1514 struct soc_camera_async_client *sasc;
1515 struct soc_of_info *info;
1516 struct i2c_client *client;
1517 char clk_name[V4L2_CLK_NAME_SIZE];
1518 int ret;
1519
1520
1521 info = devm_kzalloc(ici->v4l2_dev.dev, sizeof(struct soc_of_info),
1522 GFP_KERNEL);
1523 if (!info)
1524 return -ENOMEM;
1525
1526 info->sasd.asd.match.fwnode = of_fwnode_handle(remote);
1527 info->sasd.asd.match_type = V4L2_ASYNC_MATCH_FWNODE;
1528 info->subdev = &info->sasd.asd;
1529
1530
1531 sasc = &info->sasc;
1532
1533
1534 sdesc.host_desc.board_info = ERR_PTR(-ENODATA);
1535
1536 ret = soc_camera_dyn_pdev(&sdesc, sasc);
1537 if (ret < 0)
1538 goto eallocpdev;
1539
1540 sasc->sensor = &info->sasd.asd;
1541
1542 icd = soc_camera_add_pdev(sasc);
1543 if (!icd) {
1544 ret = -ENOMEM;
1545 goto eaddpdev;
1546 }
1547
1548 v4l2_async_notifier_init(&sasc->notifier);
1549
1550 ret = v4l2_async_notifier_add_subdev(&sasc->notifier, info->subdev);
1551 if (ret) {
1552 of_node_put(remote);
1553 goto eaddasd;
1554 }
1555
1556 sasc->notifier.ops = &soc_camera_async_ops;
1557
1558 icd->sasc = sasc;
1559 icd->parent = ici->v4l2_dev.dev;
1560
1561 client = of_find_i2c_device_by_node(remote);
1562
1563 if (client)
1564 v4l2_clk_name_i2c(clk_name, sizeof(clk_name),
1565 client->adapter->nr, client->addr);
1566 else
1567 v4l2_clk_name_of(clk_name, sizeof(clk_name), remote);
1568
1569 icd->clk = v4l2_clk_register(&soc_camera_clk_ops, clk_name, icd);
1570 if (IS_ERR(icd->clk)) {
1571 ret = PTR_ERR(icd->clk);
1572 goto eclkreg;
1573 }
1574
1575 ret = v4l2_async_notifier_register(&ici->v4l2_dev, &sasc->notifier);
1576 if (!ret)
1577 return 0;
1578
1579 v4l2_clk_unregister(icd->clk);
1580eclkreg:
1581 icd->clk = NULL;
1582eaddasd:
1583 v4l2_async_notifier_cleanup(&sasc->notifier);
1584 platform_device_del(sasc->pdev);
1585eaddpdev:
1586 platform_device_put(sasc->pdev);
1587eallocpdev:
1588 devm_kfree(ici->v4l2_dev.dev, info);
1589 dev_err(ici->v4l2_dev.dev, "group probe failed: %d\n", ret);
1590
1591 return ret;
1592}
1593
1594static void scan_of_host(struct soc_camera_host *ici)
1595{
1596 struct device *dev = ici->v4l2_dev.dev;
1597 struct device_node *np = dev->of_node;
1598 struct device_node *epn = NULL, *rem;
1599 unsigned int i;
1600
1601 for (i = 0; ; i++) {
1602 epn = of_graph_get_next_endpoint(np, epn);
1603 if (!epn)
1604 break;
1605
1606 rem = of_graph_get_remote_port_parent(epn);
1607 if (!rem) {
1608 dev_notice(dev, "no remote for %pOF\n", epn);
1609 continue;
1610 }
1611
1612
1613 if (!i)
1614 soc_of_bind(ici, epn, rem);
1615
1616 if (i) {
1617 dev_err(dev, "multiple subdevices aren't supported yet!\n");
1618 break;
1619 }
1620 }
1621
1622 of_node_put(epn);
1623}
1624
1625#else
1626static inline void scan_of_host(struct soc_camera_host *ici) { }
1627#endif
1628
1629
1630static int soc_camera_probe(struct soc_camera_host *ici,
1631 struct soc_camera_device *icd)
1632{
1633 struct soc_camera_desc *sdesc = to_soc_camera_desc(icd);
1634 struct soc_camera_host_desc *shd = &sdesc->host_desc;
1635 struct device *control = NULL;
1636 int ret;
1637
1638 dev_info(icd->pdev, "Probing %s\n", dev_name(icd->pdev));
1639
1640
1641
1642
1643
1644
1645
1646
1647 ret = v4l2_ctrl_handler_init(&icd->ctrl_handler, 16);
1648 if (ret < 0)
1649 return ret;
1650
1651
1652 ret = video_dev_create(icd);
1653 if (ret < 0)
1654 goto evdc;
1655
1656
1657
1658
1659
1660
1661
1662
1663 if (shd->board_info) {
1664 ret = soc_camera_i2c_init(icd, sdesc);
1665 if (ret < 0 && ret != -EPROBE_DEFER)
1666 goto eadd;
1667 } else if (!shd->add_device || !shd->del_device) {
1668 ret = -EINVAL;
1669 goto eadd;
1670 } else {
1671 ret = soc_camera_clock_start(ici);
1672 if (ret < 0)
1673 goto eadd;
1674
1675 if (shd->module_name)
1676 ret = request_module(shd->module_name);
1677
1678 ret = shd->add_device(icd);
1679 if (ret < 0)
1680 goto eadddev;
1681
1682
1683
1684
1685
1686 control = to_soc_camera_control(icd);
1687 if (!control || !control->driver || !dev_get_drvdata(control) ||
1688 !try_module_get(control->driver->owner)) {
1689 shd->del_device(icd);
1690 ret = -ENODEV;
1691 goto enodrv;
1692 }
1693 }
1694
1695 mutex_lock(&ici->host_lock);
1696 ret = soc_camera_probe_finish(icd);
1697 mutex_unlock(&ici->host_lock);
1698 if (ret < 0)
1699 goto efinish;
1700
1701 return 0;
1702
1703efinish:
1704 if (shd->board_info) {
1705 soc_camera_i2c_free(icd);
1706 } else {
1707 shd->del_device(icd);
1708 module_put(control->driver->owner);
1709enodrv:
1710eadddev:
1711 soc_camera_clock_stop(ici);
1712 }
1713eadd:
1714 if (icd->vdev) {
1715 video_device_release(icd->vdev);
1716 icd->vdev = NULL;
1717 }
1718evdc:
1719 v4l2_ctrl_handler_free(&icd->ctrl_handler);
1720 return ret;
1721}
1722
1723
1724
1725
1726
1727
1728
1729static int soc_camera_remove(struct soc_camera_device *icd)
1730{
1731 struct soc_camera_desc *sdesc = to_soc_camera_desc(icd);
1732 struct video_device *vdev = icd->vdev;
1733
1734 v4l2_ctrl_handler_free(&icd->ctrl_handler);
1735 if (vdev) {
1736 video_unregister_device(vdev);
1737 icd->vdev = NULL;
1738 }
1739
1740 if (sdesc->host_desc.board_info) {
1741 soc_camera_i2c_free(icd);
1742 } else {
1743 struct device *dev = to_soc_camera_control(icd);
1744 struct device_driver *drv = dev ? dev->driver : NULL;
1745 if (drv) {
1746 sdesc->host_desc.del_device(icd);
1747 module_put(drv->owner);
1748 }
1749 }
1750
1751 if (icd->num_user_formats)
1752 soc_camera_free_user_formats(icd);
1753
1754 if (icd->clk) {
1755
1756 v4l2_clk_unregister(icd->clk);
1757 icd->clk = NULL;
1758 }
1759
1760 if (icd->sasc)
1761 platform_device_unregister(icd->sasc->pdev);
1762
1763 return 0;
1764}
1765
1766static int default_g_selection(struct soc_camera_device *icd,
1767 struct v4l2_selection *sel)
1768{
1769 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1770 struct v4l2_subdev_selection sdsel = {
1771 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
1772 .target = sel->target,
1773 };
1774 int ret;
1775
1776 ret = v4l2_subdev_call(sd, pad, get_selection, NULL, &sdsel);
1777 if (ret)
1778 return ret;
1779 sel->r = sdsel.r;
1780 return 0;
1781}
1782
1783static int default_s_selection(struct soc_camera_device *icd,
1784 struct v4l2_selection *sel)
1785{
1786 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1787 struct v4l2_subdev_selection sdsel = {
1788 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
1789 .target = sel->target,
1790 .flags = sel->flags,
1791 .r = sel->r,
1792 };
1793 int ret;
1794
1795 ret = v4l2_subdev_call(sd, pad, set_selection, NULL, &sdsel);
1796 if (ret)
1797 return ret;
1798 sel->r = sdsel.r;
1799 return 0;
1800}
1801
1802static int default_g_parm(struct soc_camera_device *icd,
1803 struct v4l2_streamparm *a)
1804{
1805 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1806
1807 return v4l2_g_parm_cap(icd->vdev, sd, a);
1808}
1809
1810static int default_s_parm(struct soc_camera_device *icd,
1811 struct v4l2_streamparm *a)
1812{
1813 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1814
1815 return v4l2_s_parm_cap(icd->vdev, sd, a);
1816}
1817
1818static int default_enum_framesizes(struct soc_camera_device *icd,
1819 struct v4l2_frmsizeenum *fsize)
1820{
1821 int ret;
1822 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1823 const struct soc_camera_format_xlate *xlate;
1824 struct v4l2_subdev_frame_size_enum fse = {
1825 .index = fsize->index,
1826 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
1827 };
1828
1829 xlate = soc_camera_xlate_by_fourcc(icd, fsize->pixel_format);
1830 if (!xlate)
1831 return -EINVAL;
1832 fse.code = xlate->code;
1833
1834 ret = v4l2_subdev_call(sd, pad, enum_frame_size, NULL, &fse);
1835 if (ret < 0)
1836 return ret;
1837
1838 if (fse.min_width == fse.max_width &&
1839 fse.min_height == fse.max_height) {
1840 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1841 fsize->discrete.width = fse.min_width;
1842 fsize->discrete.height = fse.min_height;
1843 return 0;
1844 }
1845 fsize->type = V4L2_FRMSIZE_TYPE_CONTINUOUS;
1846 fsize->stepwise.min_width = fse.min_width;
1847 fsize->stepwise.max_width = fse.max_width;
1848 fsize->stepwise.min_height = fse.min_height;
1849 fsize->stepwise.max_height = fse.max_height;
1850 fsize->stepwise.step_width = 1;
1851 fsize->stepwise.step_height = 1;
1852 return 0;
1853}
1854
1855int soc_camera_host_register(struct soc_camera_host *ici)
1856{
1857 struct soc_camera_host *ix;
1858 int ret;
1859
1860 if (!ici || !ici->ops ||
1861 !ici->ops->try_fmt ||
1862 !ici->ops->set_fmt ||
1863 !ici->ops->set_bus_param ||
1864 !ici->ops->querycap ||
1865 !ici->ops->init_videobuf2 ||
1866 !ici->ops->poll ||
1867 !ici->v4l2_dev.dev)
1868 return -EINVAL;
1869
1870 if (!ici->ops->set_selection)
1871 ici->ops->set_selection = default_s_selection;
1872 if (!ici->ops->get_selection)
1873 ici->ops->get_selection = default_g_selection;
1874 if (!ici->ops->set_parm)
1875 ici->ops->set_parm = default_s_parm;
1876 if (!ici->ops->get_parm)
1877 ici->ops->get_parm = default_g_parm;
1878 if (!ici->ops->enum_framesizes)
1879 ici->ops->enum_framesizes = default_enum_framesizes;
1880
1881 mutex_lock(&list_lock);
1882 list_for_each_entry(ix, &hosts, list) {
1883 if (ix->nr == ici->nr) {
1884 ret = -EBUSY;
1885 goto edevreg;
1886 }
1887 }
1888
1889 ret = v4l2_device_register(ici->v4l2_dev.dev, &ici->v4l2_dev);
1890 if (ret < 0)
1891 goto edevreg;
1892
1893 list_add_tail(&ici->list, &hosts);
1894 mutex_unlock(&list_lock);
1895
1896 mutex_init(&ici->host_lock);
1897 mutex_init(&ici->clk_lock);
1898
1899 if (ici->v4l2_dev.dev->of_node)
1900 scan_of_host(ici);
1901 else if (ici->asd_sizes)
1902
1903
1904
1905
1906
1907 scan_async_host(ici);
1908 else
1909
1910 scan_add_host(ici);
1911
1912 return 0;
1913
1914edevreg:
1915 mutex_unlock(&list_lock);
1916 return ret;
1917}
1918EXPORT_SYMBOL(soc_camera_host_register);
1919
1920
1921void soc_camera_host_unregister(struct soc_camera_host *ici)
1922{
1923 struct soc_camera_device *icd, *tmp;
1924 struct soc_camera_async_client *sasc;
1925 LIST_HEAD(notifiers);
1926
1927 mutex_lock(&list_lock);
1928 list_del(&ici->list);
1929 list_for_each_entry(icd, &devices, list)
1930 if (icd->iface == ici->nr && icd->sasc) {
1931
1932 get_device(icd->pdev);
1933 list_add(&icd->sasc->list, ¬ifiers);
1934 }
1935 mutex_unlock(&list_lock);
1936
1937 list_for_each_entry(sasc, ¬ifiers, list) {
1938
1939 v4l2_async_notifier_unregister(&sasc->notifier);
1940 v4l2_async_notifier_cleanup(&sasc->notifier);
1941 put_device(&sasc->pdev->dev);
1942 }
1943
1944 mutex_lock(&list_lock);
1945
1946 list_for_each_entry_safe(icd, tmp, &devices, list)
1947 if (icd->iface == ici->nr)
1948 soc_camera_remove(icd);
1949
1950 mutex_unlock(&list_lock);
1951
1952 v4l2_device_unregister(&ici->v4l2_dev);
1953}
1954EXPORT_SYMBOL(soc_camera_host_unregister);
1955
1956
1957static int soc_camera_device_register(struct soc_camera_device *icd)
1958{
1959 struct soc_camera_device *ix;
1960 int num = -1, i;
1961
1962 mutex_lock(&list_lock);
1963 for (i = 0; i < 256 && num < 0; i++) {
1964 num = i;
1965
1966 list_for_each_entry(ix, &devices, list) {
1967 if (ix->iface == icd->iface && ix->devnum == i) {
1968 num = -1;
1969 break;
1970 }
1971 }
1972 }
1973
1974 if (num < 0) {
1975
1976
1977
1978
1979 mutex_unlock(&list_lock);
1980 return -ENOMEM;
1981 }
1982
1983 icd->devnum = num;
1984 icd->use_count = 0;
1985 icd->host_priv = NULL;
1986
1987
1988
1989
1990
1991 i = to_platform_device(icd->pdev)->id;
1992 if (i < 0)
1993
1994 i = 0;
1995 if (i >= MAP_MAX_NUM) {
1996 mutex_unlock(&list_lock);
1997 return -EBUSY;
1998 }
1999 set_bit(i, device_map);
2000 list_add_tail(&icd->list, &devices);
2001 mutex_unlock(&list_lock);
2002
2003 return 0;
2004}
2005
2006static const struct v4l2_ioctl_ops soc_camera_ioctl_ops = {
2007 .vidioc_querycap = soc_camera_querycap,
2008 .vidioc_try_fmt_vid_cap = soc_camera_try_fmt_vid_cap,
2009 .vidioc_g_fmt_vid_cap = soc_camera_g_fmt_vid_cap,
2010 .vidioc_s_fmt_vid_cap = soc_camera_s_fmt_vid_cap,
2011 .vidioc_enum_fmt_vid_cap = soc_camera_enum_fmt_vid_cap,
2012 .vidioc_enum_input = soc_camera_enum_input,
2013 .vidioc_g_input = soc_camera_g_input,
2014 .vidioc_s_input = soc_camera_s_input,
2015 .vidioc_s_std = soc_camera_s_std,
2016 .vidioc_g_std = soc_camera_g_std,
2017 .vidioc_enum_framesizes = soc_camera_enum_framesizes,
2018 .vidioc_reqbufs = soc_camera_reqbufs,
2019 .vidioc_querybuf = soc_camera_querybuf,
2020 .vidioc_qbuf = soc_camera_qbuf,
2021 .vidioc_dqbuf = soc_camera_dqbuf,
2022 .vidioc_create_bufs = soc_camera_create_bufs,
2023 .vidioc_prepare_buf = soc_camera_prepare_buf,
2024 .vidioc_expbuf = soc_camera_expbuf,
2025 .vidioc_streamon = soc_camera_streamon,
2026 .vidioc_streamoff = soc_camera_streamoff,
2027 .vidioc_g_selection = soc_camera_g_selection,
2028 .vidioc_s_selection = soc_camera_s_selection,
2029 .vidioc_g_parm = soc_camera_g_parm,
2030 .vidioc_s_parm = soc_camera_s_parm,
2031};
2032
2033static int video_dev_create(struct soc_camera_device *icd)
2034{
2035 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
2036 struct video_device *vdev = video_device_alloc();
2037
2038 if (!vdev)
2039 return -ENOMEM;
2040
2041 strscpy(vdev->name, ici->drv_name, sizeof(vdev->name));
2042
2043 vdev->v4l2_dev = &ici->v4l2_dev;
2044 vdev->fops = &soc_camera_fops;
2045 vdev->ioctl_ops = &soc_camera_ioctl_ops;
2046 vdev->release = video_device_release;
2047 vdev->ctrl_handler = &icd->ctrl_handler;
2048 vdev->lock = &ici->host_lock;
2049
2050 icd->vdev = vdev;
2051
2052 return 0;
2053}
2054
2055
2056
2057
2058static int soc_camera_video_start(struct soc_camera_device *icd)
2059{
2060 const struct device_type *type = icd->vdev->dev.type;
2061 int ret;
2062
2063 if (!icd->parent)
2064 return -ENODEV;
2065
2066 video_set_drvdata(icd->vdev, icd);
2067 if (icd->vdev->tvnorms == 0) {
2068
2069 v4l2_disable_ioctl(icd->vdev, VIDIOC_G_STD);
2070 v4l2_disable_ioctl(icd->vdev, VIDIOC_S_STD);
2071 v4l2_disable_ioctl(icd->vdev, VIDIOC_ENUMSTD);
2072 }
2073 ret = video_register_device(icd->vdev, VFL_TYPE_GRABBER, -1);
2074 if (ret < 0) {
2075 dev_err(icd->pdev, "video_register_device failed: %d\n", ret);
2076 return ret;
2077 }
2078
2079
2080 icd->vdev->dev.type = type;
2081
2082 return 0;
2083}
2084
2085static int soc_camera_pdrv_probe(struct platform_device *pdev)
2086{
2087 struct soc_camera_desc *sdesc = pdev->dev.platform_data;
2088 struct soc_camera_subdev_desc *ssdd = &sdesc->subdev_desc;
2089 struct soc_camera_device *icd;
2090 int ret;
2091
2092 if (!sdesc)
2093 return -EINVAL;
2094
2095 icd = devm_kzalloc(&pdev->dev, sizeof(*icd), GFP_KERNEL);
2096 if (!icd)
2097 return -ENOMEM;
2098
2099
2100
2101
2102
2103
2104
2105
2106 ret = devm_regulator_bulk_get(&pdev->dev, ssdd->sd_pdata.num_regulators,
2107 ssdd->sd_pdata.regulators);
2108 if (ret < 0)
2109 return ret;
2110
2111 icd->iface = sdesc->host_desc.bus_id;
2112 icd->sdesc = sdesc;
2113 icd->pdev = &pdev->dev;
2114 platform_set_drvdata(pdev, icd);
2115
2116 icd->user_width = DEFAULT_WIDTH;
2117 icd->user_height = DEFAULT_HEIGHT;
2118
2119 return soc_camera_device_register(icd);
2120}
2121
2122
2123
2124
2125
2126
2127static int soc_camera_pdrv_remove(struct platform_device *pdev)
2128{
2129 struct soc_camera_device *icd = platform_get_drvdata(pdev);
2130 int i;
2131
2132 if (!icd)
2133 return -EINVAL;
2134
2135 i = pdev->id;
2136 if (i < 0)
2137 i = 0;
2138
2139
2140
2141
2142
2143
2144
2145 if (test_bit(i, device_map)) {
2146 clear_bit(i, device_map);
2147 list_del(&icd->list);
2148 }
2149
2150 return 0;
2151}
2152
2153static struct platform_driver __refdata soc_camera_pdrv = {
2154 .probe = soc_camera_pdrv_probe,
2155 .remove = soc_camera_pdrv_remove,
2156 .driver = {
2157 .name = "soc-camera-pdrv",
2158 },
2159};
2160
2161module_platform_driver(soc_camera_pdrv);
2162
2163MODULE_DESCRIPTION("Image capture bus driver");
2164MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
2165MODULE_LICENSE("GPL");
2166MODULE_ALIAS("platform:soc-camera-pdrv");
2167