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[media] solo6x10: move out of staging into drivers/media/pci.
[deliverable/linux.git] / drivers / media / pci / solo6x10 / solo6x10-v4l2.c
1 /*
2 * Copyright (C) 2010-2013 Bluecherry, LLC <http://www.bluecherrydvr.com>
3 *
4 * Original author:
5 * Ben Collins <bcollins@ubuntu.com>
6 *
7 * Additional work by:
8 * John Brooks <john.brooks@bluecherry.net>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 */
20
21 #include <linux/kernel.h>
22 #include <linux/module.h>
23 #include <linux/kthread.h>
24 #include <linux/freezer.h>
25
26 #include <media/v4l2-ioctl.h>
27 #include <media/v4l2-common.h>
28 #include <media/v4l2-event.h>
29 #include <media/videobuf2-dma-contig.h>
30
31 #include "solo6x10.h"
32 #include "solo6x10-tw28.h"
33
34 /* Image size is two fields, SOLO_HW_BPL is one horizontal line in hardware */
35 #define SOLO_HW_BPL 2048
36 #define solo_vlines(__solo) (__solo->video_vsize * 2)
37 #define solo_image_size(__solo) (solo_bytesperline(__solo) * \
38 solo_vlines(__solo))
39 #define solo_bytesperline(__solo) (__solo->video_hsize * 2)
40
41 #define MIN_VID_BUFFERS 2
42
43 static inline void erase_on(struct solo_dev *solo_dev)
44 {
45 solo_reg_write(solo_dev, SOLO_VO_DISP_ERASE, SOLO_VO_DISP_ERASE_ON);
46 solo_dev->erasing = 1;
47 solo_dev->frame_blank = 0;
48 }
49
50 static inline int erase_off(struct solo_dev *solo_dev)
51 {
52 if (!solo_dev->erasing)
53 return 0;
54
55 /* First time around, assert erase off */
56 if (!solo_dev->frame_blank)
57 solo_reg_write(solo_dev, SOLO_VO_DISP_ERASE, 0);
58 /* Keep the erasing flag on for 8 frames minimum */
59 if (solo_dev->frame_blank++ >= 8)
60 solo_dev->erasing = 0;
61
62 return 1;
63 }
64
65 void solo_video_in_isr(struct solo_dev *solo_dev)
66 {
67 wake_up_interruptible_all(&solo_dev->disp_thread_wait);
68 }
69
70 static void solo_win_setup(struct solo_dev *solo_dev, u8 ch,
71 int sx, int sy, int ex, int ey, int scale)
72 {
73 if (ch >= solo_dev->nr_chans)
74 return;
75
76 /* Here, we just keep window/channel the same */
77 solo_reg_write(solo_dev, SOLO_VI_WIN_CTRL0(ch),
78 SOLO_VI_WIN_CHANNEL(ch) |
79 SOLO_VI_WIN_SX(sx) |
80 SOLO_VI_WIN_EX(ex) |
81 SOLO_VI_WIN_SCALE(scale));
82
83 solo_reg_write(solo_dev, SOLO_VI_WIN_CTRL1(ch),
84 SOLO_VI_WIN_SY(sy) |
85 SOLO_VI_WIN_EY(ey));
86 }
87
88 static int solo_v4l2_ch_ext_4up(struct solo_dev *solo_dev, u8 idx, int on)
89 {
90 u8 ch = idx * 4;
91
92 if (ch >= solo_dev->nr_chans)
93 return -EINVAL;
94
95 if (!on) {
96 u8 i;
97
98 for (i = ch; i < ch + 4; i++)
99 solo_win_setup(solo_dev, i, solo_dev->video_hsize,
100 solo_vlines(solo_dev),
101 solo_dev->video_hsize,
102 solo_vlines(solo_dev), 0);
103 return 0;
104 }
105
106 /* Row 1 */
107 solo_win_setup(solo_dev, ch, 0, 0, solo_dev->video_hsize / 2,
108 solo_vlines(solo_dev) / 2, 3);
109 solo_win_setup(solo_dev, ch + 1, solo_dev->video_hsize / 2, 0,
110 solo_dev->video_hsize, solo_vlines(solo_dev) / 2, 3);
111 /* Row 2 */
112 solo_win_setup(solo_dev, ch + 2, 0, solo_vlines(solo_dev) / 2,
113 solo_dev->video_hsize / 2, solo_vlines(solo_dev), 3);
114 solo_win_setup(solo_dev, ch + 3, solo_dev->video_hsize / 2,
115 solo_vlines(solo_dev) / 2, solo_dev->video_hsize,
116 solo_vlines(solo_dev), 3);
117
118 return 0;
119 }
120
121 static int solo_v4l2_ch_ext_16up(struct solo_dev *solo_dev, int on)
122 {
123 int sy, ysize, hsize, i;
124
125 if (!on) {
126 for (i = 0; i < 16; i++)
127 solo_win_setup(solo_dev, i, solo_dev->video_hsize,
128 solo_vlines(solo_dev),
129 solo_dev->video_hsize,
130 solo_vlines(solo_dev), 0);
131 return 0;
132 }
133
134 ysize = solo_vlines(solo_dev) / 4;
135 hsize = solo_dev->video_hsize / 4;
136
137 for (sy = 0, i = 0; i < 4; i++, sy += ysize) {
138 solo_win_setup(solo_dev, i * 4, 0, sy, hsize,
139 sy + ysize, 5);
140 solo_win_setup(solo_dev, (i * 4) + 1, hsize, sy,
141 hsize * 2, sy + ysize, 5);
142 solo_win_setup(solo_dev, (i * 4) + 2, hsize * 2, sy,
143 hsize * 3, sy + ysize, 5);
144 solo_win_setup(solo_dev, (i * 4) + 3, hsize * 3, sy,
145 solo_dev->video_hsize, sy + ysize, 5);
146 }
147
148 return 0;
149 }
150
151 static int solo_v4l2_ch(struct solo_dev *solo_dev, u8 ch, int on)
152 {
153 u8 ext_ch;
154
155 if (ch < solo_dev->nr_chans) {
156 solo_win_setup(solo_dev, ch, on ? 0 : solo_dev->video_hsize,
157 on ? 0 : solo_vlines(solo_dev),
158 solo_dev->video_hsize, solo_vlines(solo_dev),
159 on ? 1 : 0);
160 return 0;
161 }
162
163 if (ch >= solo_dev->nr_chans + solo_dev->nr_ext)
164 return -EINVAL;
165
166 ext_ch = ch - solo_dev->nr_chans;
167
168 /* 4up's first */
169 if (ext_ch < 4)
170 return solo_v4l2_ch_ext_4up(solo_dev, ext_ch, on);
171
172 /* Remaining case is 16up for 16-port */
173 return solo_v4l2_ch_ext_16up(solo_dev, on);
174 }
175
176 static int solo_v4l2_set_ch(struct solo_dev *solo_dev, u8 ch)
177 {
178 if (ch >= solo_dev->nr_chans + solo_dev->nr_ext)
179 return -EINVAL;
180
181 erase_on(solo_dev);
182
183 solo_v4l2_ch(solo_dev, solo_dev->cur_disp_ch, 0);
184 solo_v4l2_ch(solo_dev, ch, 1);
185
186 solo_dev->cur_disp_ch = ch;
187
188 return 0;
189 }
190
191 static void solo_fillbuf(struct solo_dev *solo_dev,
192 struct vb2_buffer *vb)
193 {
194 dma_addr_t vbuf;
195 unsigned int fdma_addr;
196 int error = -1;
197 int i;
198
199 vbuf = vb2_dma_contig_plane_dma_addr(vb, 0);
200 if (!vbuf)
201 goto finish_buf;
202
203 if (erase_off(solo_dev)) {
204 void *p = vb2_plane_vaddr(vb, 0);
205 int image_size = solo_image_size(solo_dev);
206
207 for (i = 0; i < image_size; i += 2) {
208 ((u8 *)p)[i] = 0x80;
209 ((u8 *)p)[i + 1] = 0x00;
210 }
211 error = 0;
212 } else {
213 fdma_addr = SOLO_DISP_EXT_ADDR + (solo_dev->old_write *
214 (SOLO_HW_BPL * solo_vlines(solo_dev)));
215
216 error = solo_p2m_dma_t(solo_dev, 0, vbuf, fdma_addr,
217 solo_bytesperline(solo_dev),
218 solo_vlines(solo_dev), SOLO_HW_BPL);
219 }
220
221 finish_buf:
222 if (!error) {
223 vb2_set_plane_payload(vb, 0,
224 solo_vlines(solo_dev) * solo_bytesperline(solo_dev));
225 vb->v4l2_buf.sequence = solo_dev->sequence++;
226 v4l2_get_timestamp(&vb->v4l2_buf.timestamp);
227 }
228
229 vb2_buffer_done(vb, error ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
230 }
231
232 static void solo_thread_try(struct solo_dev *solo_dev)
233 {
234 struct solo_vb2_buf *vb;
235
236 /* Only "break" from this loop if slock is held, otherwise
237 * just return. */
238 for (;;) {
239 unsigned int cur_write;
240
241 cur_write = SOLO_VI_STATUS0_PAGE(
242 solo_reg_read(solo_dev, SOLO_VI_STATUS0));
243 if (cur_write == solo_dev->old_write)
244 return;
245
246 spin_lock(&solo_dev->slock);
247
248 if (list_empty(&solo_dev->vidq_active))
249 break;
250
251 vb = list_first_entry(&solo_dev->vidq_active, struct solo_vb2_buf,
252 list);
253
254 solo_dev->old_write = cur_write;
255 list_del(&vb->list);
256
257 spin_unlock(&solo_dev->slock);
258
259 solo_fillbuf(solo_dev, &vb->vb);
260 }
261
262 assert_spin_locked(&solo_dev->slock);
263 spin_unlock(&solo_dev->slock);
264 }
265
266 static int solo_thread(void *data)
267 {
268 struct solo_dev *solo_dev = data;
269 DECLARE_WAITQUEUE(wait, current);
270
271 set_freezable();
272 add_wait_queue(&solo_dev->disp_thread_wait, &wait);
273
274 for (;;) {
275 long timeout = schedule_timeout_interruptible(HZ);
276
277 if (timeout == -ERESTARTSYS || kthread_should_stop())
278 break;
279 solo_thread_try(solo_dev);
280 try_to_freeze();
281 }
282
283 remove_wait_queue(&solo_dev->disp_thread_wait, &wait);
284
285 return 0;
286 }
287
288 static int solo_start_thread(struct solo_dev *solo_dev)
289 {
290 int ret = 0;
291
292 solo_dev->kthread = kthread_run(solo_thread, solo_dev, SOLO6X10_NAME "_disp");
293
294 if (IS_ERR(solo_dev->kthread)) {
295 ret = PTR_ERR(solo_dev->kthread);
296 solo_dev->kthread = NULL;
297 return ret;
298 }
299 solo_irq_on(solo_dev, SOLO_IRQ_VIDEO_IN);
300
301 return ret;
302 }
303
304 static void solo_stop_thread(struct solo_dev *solo_dev)
305 {
306 if (!solo_dev->kthread)
307 return;
308
309 solo_irq_off(solo_dev, SOLO_IRQ_VIDEO_IN);
310 kthread_stop(solo_dev->kthread);
311 solo_dev->kthread = NULL;
312 }
313
314 static int solo_queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
315 unsigned int *num_buffers, unsigned int *num_planes,
316 unsigned int sizes[], void *alloc_ctxs[])
317 {
318 struct solo_dev *solo_dev = vb2_get_drv_priv(q);
319
320 sizes[0] = solo_image_size(solo_dev);
321 alloc_ctxs[0] = solo_dev->alloc_ctx;
322 *num_planes = 1;
323
324 if (*num_buffers < MIN_VID_BUFFERS)
325 *num_buffers = MIN_VID_BUFFERS;
326
327 return 0;
328 }
329
330 static int solo_start_streaming(struct vb2_queue *q, unsigned int count)
331 {
332 struct solo_dev *solo_dev = vb2_get_drv_priv(q);
333
334 solo_dev->sequence = 0;
335 return solo_start_thread(solo_dev);
336 }
337
338 static void solo_stop_streaming(struct vb2_queue *q)
339 {
340 struct solo_dev *solo_dev = vb2_get_drv_priv(q);
341
342 solo_stop_thread(solo_dev);
343 INIT_LIST_HEAD(&solo_dev->vidq_active);
344 }
345
346 static void solo_buf_queue(struct vb2_buffer *vb)
347 {
348 struct vb2_queue *vq = vb->vb2_queue;
349 struct solo_dev *solo_dev = vb2_get_drv_priv(vq);
350 struct solo_vb2_buf *solo_vb =
351 container_of(vb, struct solo_vb2_buf, vb);
352
353 spin_lock(&solo_dev->slock);
354 list_add_tail(&solo_vb->list, &solo_dev->vidq_active);
355 spin_unlock(&solo_dev->slock);
356 wake_up_interruptible(&solo_dev->disp_thread_wait);
357 }
358
359 static const struct vb2_ops solo_video_qops = {
360 .queue_setup = solo_queue_setup,
361 .buf_queue = solo_buf_queue,
362 .start_streaming = solo_start_streaming,
363 .stop_streaming = solo_stop_streaming,
364 .wait_prepare = vb2_ops_wait_prepare,
365 .wait_finish = vb2_ops_wait_finish,
366 };
367
368 static int solo_querycap(struct file *file, void *priv,
369 struct v4l2_capability *cap)
370 {
371 struct solo_dev *solo_dev = video_drvdata(file);
372
373 strcpy(cap->driver, SOLO6X10_NAME);
374 strcpy(cap->card, "Softlogic 6x10");
375 snprintf(cap->bus_info, sizeof(cap->bus_info), "PCI:%s",
376 pci_name(solo_dev->pdev));
377 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE |
378 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
379 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
380 return 0;
381 }
382
383 static int solo_enum_ext_input(struct solo_dev *solo_dev,
384 struct v4l2_input *input)
385 {
386 static const char * const dispnames_1[] = { "4UP" };
387 static const char * const dispnames_2[] = { "4UP-1", "4UP-2" };
388 static const char * const dispnames_5[] = {
389 "4UP-1", "4UP-2", "4UP-3", "4UP-4", "16UP"
390 };
391 const char * const *dispnames;
392
393 if (input->index >= (solo_dev->nr_chans + solo_dev->nr_ext))
394 return -EINVAL;
395
396 if (solo_dev->nr_ext == 5)
397 dispnames = dispnames_5;
398 else if (solo_dev->nr_ext == 2)
399 dispnames = dispnames_2;
400 else
401 dispnames = dispnames_1;
402
403 snprintf(input->name, sizeof(input->name), "Multi %s",
404 dispnames[input->index - solo_dev->nr_chans]);
405
406 return 0;
407 }
408
409 static int solo_enum_input(struct file *file, void *priv,
410 struct v4l2_input *input)
411 {
412 struct solo_dev *solo_dev = video_drvdata(file);
413
414 if (input->index >= solo_dev->nr_chans) {
415 int ret = solo_enum_ext_input(solo_dev, input);
416
417 if (ret < 0)
418 return ret;
419 } else {
420 snprintf(input->name, sizeof(input->name), "Camera %d",
421 input->index + 1);
422
423 /* We can only check this for normal inputs */
424 if (!tw28_get_video_status(solo_dev, input->index))
425 input->status = V4L2_IN_ST_NO_SIGNAL;
426 }
427
428 input->type = V4L2_INPUT_TYPE_CAMERA;
429 input->std = solo_dev->vfd->tvnorms;
430 return 0;
431 }
432
433 static int solo_set_input(struct file *file, void *priv, unsigned int index)
434 {
435 struct solo_dev *solo_dev = video_drvdata(file);
436 int ret = solo_v4l2_set_ch(solo_dev, index);
437
438 if (!ret) {
439 while (erase_off(solo_dev))
440 /* Do nothing */;
441 }
442
443 return ret;
444 }
445
446 static int solo_get_input(struct file *file, void *priv, unsigned int *index)
447 {
448 struct solo_dev *solo_dev = video_drvdata(file);
449
450 *index = solo_dev->cur_disp_ch;
451
452 return 0;
453 }
454
455 static int solo_enum_fmt_cap(struct file *file, void *priv,
456 struct v4l2_fmtdesc *f)
457 {
458 if (f->index)
459 return -EINVAL;
460
461 f->pixelformat = V4L2_PIX_FMT_UYVY;
462 strlcpy(f->description, "UYUV 4:2:2 Packed", sizeof(f->description));
463
464 return 0;
465 }
466
467 static int solo_try_fmt_cap(struct file *file, void *priv,
468 struct v4l2_format *f)
469 {
470 struct solo_dev *solo_dev = video_drvdata(file);
471 struct v4l2_pix_format *pix = &f->fmt.pix;
472 int image_size = solo_image_size(solo_dev);
473
474 if (pix->pixelformat != V4L2_PIX_FMT_UYVY)
475 return -EINVAL;
476
477 pix->width = solo_dev->video_hsize;
478 pix->height = solo_vlines(solo_dev);
479 pix->sizeimage = image_size;
480 pix->field = V4L2_FIELD_INTERLACED;
481 pix->pixelformat = V4L2_PIX_FMT_UYVY;
482 pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
483 pix->priv = 0;
484 return 0;
485 }
486
487 static int solo_set_fmt_cap(struct file *file, void *priv,
488 struct v4l2_format *f)
489 {
490 struct solo_dev *solo_dev = video_drvdata(file);
491
492 if (vb2_is_busy(&solo_dev->vidq))
493 return -EBUSY;
494
495 /* For right now, if it doesn't match our running config,
496 * then fail */
497 return solo_try_fmt_cap(file, priv, f);
498 }
499
500 static int solo_get_fmt_cap(struct file *file, void *priv,
501 struct v4l2_format *f)
502 {
503 struct solo_dev *solo_dev = video_drvdata(file);
504 struct v4l2_pix_format *pix = &f->fmt.pix;
505
506 pix->width = solo_dev->video_hsize;
507 pix->height = solo_vlines(solo_dev);
508 pix->pixelformat = V4L2_PIX_FMT_UYVY;
509 pix->field = V4L2_FIELD_INTERLACED;
510 pix->sizeimage = solo_image_size(solo_dev);
511 pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
512 pix->bytesperline = solo_bytesperline(solo_dev);
513 pix->priv = 0;
514
515 return 0;
516 }
517
518 static int solo_g_std(struct file *file, void *priv, v4l2_std_id *i)
519 {
520 struct solo_dev *solo_dev = video_drvdata(file);
521
522 if (solo_dev->video_type == SOLO_VO_FMT_TYPE_NTSC)
523 *i = V4L2_STD_NTSC_M;
524 else
525 *i = V4L2_STD_PAL;
526 return 0;
527 }
528
529 int solo_set_video_type(struct solo_dev *solo_dev, bool is_50hz)
530 {
531 int i;
532
533 /* Make sure all video nodes are idle */
534 if (vb2_is_busy(&solo_dev->vidq))
535 return -EBUSY;
536 for (i = 0; i < solo_dev->nr_chans; i++)
537 if (vb2_is_busy(&solo_dev->v4l2_enc[i]->vidq))
538 return -EBUSY;
539 solo_dev->video_type = is_50hz ? SOLO_VO_FMT_TYPE_PAL :
540 SOLO_VO_FMT_TYPE_NTSC;
541 /* Reconfigure for the new standard */
542 solo_disp_init(solo_dev);
543 solo_enc_init(solo_dev);
544 solo_tw28_init(solo_dev);
545 for (i = 0; i < solo_dev->nr_chans; i++)
546 solo_update_mode(solo_dev->v4l2_enc[i]);
547 return solo_v4l2_set_ch(solo_dev, solo_dev->cur_disp_ch);
548 }
549
550 static int solo_s_std(struct file *file, void *priv, v4l2_std_id std)
551 {
552 struct solo_dev *solo_dev = video_drvdata(file);
553
554 return solo_set_video_type(solo_dev, std & V4L2_STD_625_50);
555 }
556
557 static int solo_s_ctrl(struct v4l2_ctrl *ctrl)
558 {
559 struct solo_dev *solo_dev =
560 container_of(ctrl->handler, struct solo_dev, disp_hdl);
561
562 switch (ctrl->id) {
563 case V4L2_CID_MOTION_TRACE:
564 if (ctrl->val) {
565 solo_reg_write(solo_dev, SOLO_VI_MOTION_BORDER,
566 SOLO_VI_MOTION_Y_ADD |
567 SOLO_VI_MOTION_Y_VALUE(0x20) |
568 SOLO_VI_MOTION_CB_VALUE(0x10) |
569 SOLO_VI_MOTION_CR_VALUE(0x10));
570 solo_reg_write(solo_dev, SOLO_VI_MOTION_BAR,
571 SOLO_VI_MOTION_CR_ADD |
572 SOLO_VI_MOTION_Y_VALUE(0x10) |
573 SOLO_VI_MOTION_CB_VALUE(0x80) |
574 SOLO_VI_MOTION_CR_VALUE(0x10));
575 } else {
576 solo_reg_write(solo_dev, SOLO_VI_MOTION_BORDER, 0);
577 solo_reg_write(solo_dev, SOLO_VI_MOTION_BAR, 0);
578 }
579 return 0;
580 default:
581 break;
582 }
583 return -EINVAL;
584 }
585
586 static const struct v4l2_file_operations solo_v4l2_fops = {
587 .owner = THIS_MODULE,
588 .open = v4l2_fh_open,
589 .release = vb2_fop_release,
590 .read = vb2_fop_read,
591 .poll = vb2_fop_poll,
592 .mmap = vb2_fop_mmap,
593 .unlocked_ioctl = video_ioctl2,
594 };
595
596 static const struct v4l2_ioctl_ops solo_v4l2_ioctl_ops = {
597 .vidioc_querycap = solo_querycap,
598 .vidioc_s_std = solo_s_std,
599 .vidioc_g_std = solo_g_std,
600 /* Input callbacks */
601 .vidioc_enum_input = solo_enum_input,
602 .vidioc_s_input = solo_set_input,
603 .vidioc_g_input = solo_get_input,
604 /* Video capture format callbacks */
605 .vidioc_enum_fmt_vid_cap = solo_enum_fmt_cap,
606 .vidioc_try_fmt_vid_cap = solo_try_fmt_cap,
607 .vidioc_s_fmt_vid_cap = solo_set_fmt_cap,
608 .vidioc_g_fmt_vid_cap = solo_get_fmt_cap,
609 /* Streaming I/O */
610 .vidioc_reqbufs = vb2_ioctl_reqbufs,
611 .vidioc_querybuf = vb2_ioctl_querybuf,
612 .vidioc_qbuf = vb2_ioctl_qbuf,
613 .vidioc_dqbuf = vb2_ioctl_dqbuf,
614 .vidioc_streamon = vb2_ioctl_streamon,
615 .vidioc_streamoff = vb2_ioctl_streamoff,
616 /* Logging and events */
617 .vidioc_log_status = v4l2_ctrl_log_status,
618 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
619 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
620 };
621
622 static struct video_device solo_v4l2_template = {
623 .name = SOLO6X10_NAME,
624 .fops = &solo_v4l2_fops,
625 .ioctl_ops = &solo_v4l2_ioctl_ops,
626 .minor = -1,
627 .release = video_device_release,
628 .tvnorms = V4L2_STD_NTSC_M | V4L2_STD_PAL,
629 };
630
631 static const struct v4l2_ctrl_ops solo_ctrl_ops = {
632 .s_ctrl = solo_s_ctrl,
633 };
634
635 static const struct v4l2_ctrl_config solo_motion_trace_ctrl = {
636 .ops = &solo_ctrl_ops,
637 .id = V4L2_CID_MOTION_TRACE,
638 .name = "Motion Detection Trace",
639 .type = V4L2_CTRL_TYPE_BOOLEAN,
640 .max = 1,
641 .step = 1,
642 };
643
644 int solo_v4l2_init(struct solo_dev *solo_dev, unsigned nr)
645 {
646 int ret;
647 int i;
648
649 init_waitqueue_head(&solo_dev->disp_thread_wait);
650 spin_lock_init(&solo_dev->slock);
651 mutex_init(&solo_dev->lock);
652 INIT_LIST_HEAD(&solo_dev->vidq_active);
653
654 solo_dev->vfd = video_device_alloc();
655 if (!solo_dev->vfd)
656 return -ENOMEM;
657
658 *solo_dev->vfd = solo_v4l2_template;
659 solo_dev->vfd->v4l2_dev = &solo_dev->v4l2_dev;
660 solo_dev->vfd->queue = &solo_dev->vidq;
661 solo_dev->vfd->lock = &solo_dev->lock;
662 v4l2_ctrl_handler_init(&solo_dev->disp_hdl, 1);
663 v4l2_ctrl_new_custom(&solo_dev->disp_hdl, &solo_motion_trace_ctrl, NULL);
664 if (solo_dev->disp_hdl.error) {
665 ret = solo_dev->disp_hdl.error;
666 goto fail;
667 }
668 solo_dev->vfd->ctrl_handler = &solo_dev->disp_hdl;
669
670 video_set_drvdata(solo_dev->vfd, solo_dev);
671
672 solo_dev->vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
673 solo_dev->vidq.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
674 solo_dev->vidq.ops = &solo_video_qops;
675 solo_dev->vidq.mem_ops = &vb2_dma_contig_memops;
676 solo_dev->vidq.drv_priv = solo_dev;
677 solo_dev->vidq.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
678 solo_dev->vidq.gfp_flags = __GFP_DMA32;
679 solo_dev->vidq.buf_struct_size = sizeof(struct solo_vb2_buf);
680 solo_dev->vidq.lock = &solo_dev->lock;
681 ret = vb2_queue_init(&solo_dev->vidq);
682 if (ret < 0)
683 goto fail;
684
685 solo_dev->alloc_ctx = vb2_dma_contig_init_ctx(&solo_dev->pdev->dev);
686 if (IS_ERR(solo_dev->alloc_ctx)) {
687 dev_err(&solo_dev->pdev->dev, "Can't allocate buffer context");
688 return PTR_ERR(solo_dev->alloc_ctx);
689 }
690
691 /* Cycle all the channels and clear */
692 for (i = 0; i < solo_dev->nr_chans; i++) {
693 solo_v4l2_set_ch(solo_dev, i);
694 while (erase_off(solo_dev))
695 /* Do nothing */;
696 }
697
698 /* Set the default display channel */
699 solo_v4l2_set_ch(solo_dev, 0);
700 while (erase_off(solo_dev))
701 /* Do nothing */;
702
703 ret = video_register_device(solo_dev->vfd, VFL_TYPE_GRABBER, nr);
704 if (ret < 0)
705 goto fail;
706
707 snprintf(solo_dev->vfd->name, sizeof(solo_dev->vfd->name), "%s (%i)",
708 SOLO6X10_NAME, solo_dev->vfd->num);
709
710 dev_info(&solo_dev->pdev->dev, "Display as /dev/video%d with "
711 "%d inputs (%d extended)\n", solo_dev->vfd->num,
712 solo_dev->nr_chans, solo_dev->nr_ext);
713
714 return 0;
715
716 fail:
717 video_device_release(solo_dev->vfd);
718 vb2_dma_contig_cleanup_ctx(solo_dev->alloc_ctx);
719 v4l2_ctrl_handler_free(&solo_dev->disp_hdl);
720 solo_dev->vfd = NULL;
721 return ret;
722 }
723
724 void solo_v4l2_exit(struct solo_dev *solo_dev)
725 {
726 if (solo_dev->vfd == NULL)
727 return;
728
729 video_unregister_device(solo_dev->vfd);
730 vb2_dma_contig_cleanup_ctx(solo_dev->alloc_ctx);
731 v4l2_ctrl_handler_free(&solo_dev->disp_hdl);
732 solo_dev->vfd = NULL;
733 }
Linux kernel - Deliverables
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