7bc495e4ece259ddc0a23b4248c7d774a41744a1
[sfrench/cifs-2.6.git] / drivers / media / pci / cx25821 / cx25821-video.c
1 /*
2  *  Driver for the Conexant CX25821 PCIe bridge
3  *
4  *  Copyright (C) 2009 Conexant Systems Inc.
5  *  Authors  <shu.lin@conexant.com>, <hiep.huynh@conexant.com>
6  *  Based on Steven Toth <stoth@linuxtv.org> cx25821 driver
7  *  Parts adapted/taken from Eduardo Moscoso Rubino
8  *  Copyright (C) 2009 Eduardo Moscoso Rubino <moscoso@TopoLogica.com>
9  *
10  *
11  *  This program is free software; you can redistribute it and/or modify
12  *  it under the terms of the GNU General Public License as published by
13  *  the Free Software Foundation; either version 2 of the License, or
14  *  (at your option) any later version.
15  *
16  *  This program is distributed in the hope that it will be useful,
17  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
18  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19  *
20  *  GNU General Public License for more details.
21  *
22  *  You should have received a copy of the GNU General Public License
23  *  along with this program; if not, write to the Free Software
24  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25  */
26
27 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
28
29 #include "cx25821-video.h"
30
31 MODULE_DESCRIPTION("v4l2 driver module for cx25821 based TV cards");
32 MODULE_AUTHOR("Hiep Huynh <hiep.huynh@conexant.com>");
33 MODULE_LICENSE("GPL");
34
35 static unsigned int video_nr[] = {[0 ... (CX25821_MAXBOARDS - 1)] = UNSET };
36
37 module_param_array(video_nr, int, NULL, 0444);
38
39 MODULE_PARM_DESC(video_nr, "video device numbers");
40
41 static unsigned int video_debug = VIDEO_DEBUG;
42 module_param(video_debug, int, 0644);
43 MODULE_PARM_DESC(video_debug, "enable debug messages [video]");
44
45 static unsigned int irq_debug;
46 module_param(irq_debug, int, 0644);
47 MODULE_PARM_DESC(irq_debug, "enable debug messages [IRQ handler]");
48
49 #define FORMAT_FLAGS_PACKED       0x01
50
51 static const struct cx25821_fmt formats[] = {
52         {
53                 .name = "4:1:1, packed, Y41P",
54                 .fourcc = V4L2_PIX_FMT_Y41P,
55                 .depth = 12,
56                 .flags = FORMAT_FLAGS_PACKED,
57         }, {
58                 .name = "4:2:2, packed, YUYV",
59                 .fourcc = V4L2_PIX_FMT_YUYV,
60                 .depth = 16,
61                 .flags = FORMAT_FLAGS_PACKED,
62         },
63 };
64
65 static const struct cx25821_fmt *cx25821_format_by_fourcc(unsigned int fourcc)
66 {
67         unsigned int i;
68
69         for (i = 0; i < ARRAY_SIZE(formats); i++)
70                 if (formats[i].fourcc == fourcc)
71                         return formats + i;
72         return NULL;
73 }
74
75 int cx25821_start_video_dma(struct cx25821_dev *dev,
76                             struct cx25821_dmaqueue *q,
77                             struct cx25821_buffer *buf,
78                             const struct sram_channel *channel)
79 {
80         int tmp = 0;
81
82         /* setup fifo + format */
83         cx25821_sram_channel_setup(dev, channel, buf->bpl, buf->risc.dma);
84
85         /* reset counter */
86         cx_write(channel->gpcnt_ctl, 3);
87
88         /* enable irq */
89         cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) | (1 << channel->i));
90         cx_set(channel->int_msk, 0x11);
91
92         /* start dma */
93         cx_write(channel->dma_ctl, 0x11);       /* FIFO and RISC enable */
94
95         /* make sure upstream setting if any is reversed */
96         tmp = cx_read(VID_CH_MODE_SEL);
97         cx_write(VID_CH_MODE_SEL, tmp & 0xFFFFFE00);
98
99         return 0;
100 }
101
102 int cx25821_video_irq(struct cx25821_dev *dev, int chan_num, u32 status)
103 {
104         int handled = 0;
105         u32 mask;
106         const struct sram_channel *channel = dev->channels[chan_num].sram_channels;
107
108         mask = cx_read(channel->int_msk);
109         if (0 == (status & mask))
110                 return handled;
111
112         cx_write(channel->int_stat, status);
113
114         /* risc op code error */
115         if (status & (1 << 16)) {
116                 pr_warn("%s, %s: video risc op code error\n",
117                         dev->name, channel->name);
118                 cx_clear(channel->dma_ctl, 0x11);
119                 cx25821_sram_channel_dump(dev, channel);
120         }
121
122         /* risc1 y */
123         if (status & FLD_VID_DST_RISC1) {
124                 struct cx25821_dmaqueue *dmaq =
125                         &dev->channels[channel->i].dma_vidq;
126                 struct cx25821_buffer *buf;
127
128                 spin_lock(&dev->slock);
129                 if (!list_empty(&dmaq->active)) {
130                         buf = list_entry(dmaq->active.next,
131                                          struct cx25821_buffer, queue);
132
133                         v4l2_get_timestamp(&buf->vb.v4l2_buf.timestamp);
134                         buf->vb.v4l2_buf.sequence = dmaq->count++;
135                         list_del(&buf->queue);
136                         vb2_buffer_done(&buf->vb, VB2_BUF_STATE_DONE);
137                 }
138                 spin_unlock(&dev->slock);
139                 handled++;
140         }
141         return handled;
142 }
143
144 static int cx25821_queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
145                            unsigned int *num_buffers, unsigned int *num_planes,
146                            unsigned int sizes[], void *alloc_ctxs[])
147 {
148         struct cx25821_channel *chan = q->drv_priv;
149         unsigned size = (chan->fmt->depth * chan->width * chan->height) >> 3;
150
151         if (fmt && fmt->fmt.pix.sizeimage < size)
152                 return -EINVAL;
153
154         *num_planes = 1;
155         sizes[0] = fmt ? fmt->fmt.pix.sizeimage : size;
156         alloc_ctxs[0] = chan->dev->alloc_ctx;
157         return 0;
158 }
159
160 static int cx25821_buffer_prepare(struct vb2_buffer *vb)
161 {
162         struct cx25821_channel *chan = vb->vb2_queue->drv_priv;
163         struct cx25821_dev *dev = chan->dev;
164         struct cx25821_buffer *buf =
165                 container_of(vb, struct cx25821_buffer, vb);
166         struct sg_table *sgt = vb2_dma_sg_plane_desc(vb, 0);
167         u32 line0_offset;
168         int bpl_local = LINE_SIZE_D1;
169         int ret;
170
171         if (chan->pixel_formats == PIXEL_FRMT_411)
172                 buf->bpl = (chan->fmt->depth * chan->width) >> 3;
173         else
174                 buf->bpl = (chan->fmt->depth >> 3) * chan->width;
175
176         if (vb2_plane_size(vb, 0) < chan->height * buf->bpl)
177                 return -EINVAL;
178         vb2_set_plane_payload(vb, 0, chan->height * buf->bpl);
179         buf->vb.v4l2_buf.field = chan->field;
180
181         if (chan->pixel_formats == PIXEL_FRMT_411) {
182                 bpl_local = buf->bpl;
183         } else {
184                 bpl_local = buf->bpl;   /* Default */
185
186                 if (chan->use_cif_resolution) {
187                         if (dev->tvnorm & V4L2_STD_625_50)
188                                 bpl_local = 352 << 1;
189                         else
190                                 bpl_local = chan->cif_width << 1;
191                 }
192         }
193
194         switch (chan->field) {
195         case V4L2_FIELD_TOP:
196                 ret = cx25821_risc_buffer(dev->pci, &buf->risc,
197                                 sgt->sgl, 0, UNSET,
198                                 buf->bpl, 0, chan->height);
199                 break;
200         case V4L2_FIELD_BOTTOM:
201                 ret = cx25821_risc_buffer(dev->pci, &buf->risc,
202                                 sgt->sgl, UNSET, 0,
203                                 buf->bpl, 0, chan->height);
204                 break;
205         case V4L2_FIELD_INTERLACED:
206                 /* All other formats are top field first */
207                 line0_offset = 0;
208                 dprintk(1, "top field first\n");
209
210                 ret = cx25821_risc_buffer(dev->pci, &buf->risc,
211                                 sgt->sgl, line0_offset,
212                                 bpl_local, bpl_local, bpl_local,
213                                 chan->height >> 1);
214                 break;
215         case V4L2_FIELD_SEQ_TB:
216                 ret = cx25821_risc_buffer(dev->pci, &buf->risc,
217                                 sgt->sgl,
218                                 0, buf->bpl * (chan->height >> 1),
219                                 buf->bpl, 0, chan->height >> 1);
220                 break;
221         case V4L2_FIELD_SEQ_BT:
222                 ret = cx25821_risc_buffer(dev->pci, &buf->risc,
223                                 sgt->sgl,
224                                 buf->bpl * (chan->height >> 1), 0,
225                                 buf->bpl, 0, chan->height >> 1);
226                 break;
227         default:
228                 WARN_ON(1);
229                 ret = -EINVAL;
230                 break;
231         }
232
233         dprintk(2, "[%p/%d] buffer_prep - %dx%d %dbpp \"%s\" - dma=0x%08lx\n",
234                 buf, buf->vb.v4l2_buf.index, chan->width, chan->height,
235                 chan->fmt->depth, chan->fmt->name,
236                 (unsigned long)buf->risc.dma);
237
238         return ret;
239 }
240
241 static void cx25821_buffer_finish(struct vb2_buffer *vb)
242 {
243         struct cx25821_buffer *buf =
244                 container_of(vb, struct cx25821_buffer, vb);
245         struct cx25821_channel *chan = vb->vb2_queue->drv_priv;
246         struct cx25821_dev *dev = chan->dev;
247
248         cx25821_free_buffer(dev, buf);
249 }
250
251 static void cx25821_buffer_queue(struct vb2_buffer *vb)
252 {
253         struct cx25821_buffer *buf =
254                 container_of(vb, struct cx25821_buffer, vb);
255         struct cx25821_channel *chan = vb->vb2_queue->drv_priv;
256         struct cx25821_dev *dev = chan->dev;
257         struct cx25821_buffer *prev;
258         struct cx25821_dmaqueue *q = &dev->channels[chan->id].dma_vidq;
259
260         buf->risc.cpu[1] = cpu_to_le32(buf->risc.dma + 12);
261         buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_CNT_INC);
262         buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma + 12);
263         buf->risc.jmp[2] = cpu_to_le32(0); /* bits 63-32 */
264
265         if (list_empty(&q->active)) {
266                 list_add_tail(&buf->queue, &q->active);
267         } else {
268                 buf->risc.cpu[0] |= cpu_to_le32(RISC_IRQ1);
269                 prev = list_entry(q->active.prev, struct cx25821_buffer,
270                                 queue);
271                 list_add_tail(&buf->queue, &q->active);
272                 prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
273         }
274 }
275
276 static int cx25821_start_streaming(struct vb2_queue *q, unsigned int count)
277 {
278         struct cx25821_channel *chan = q->drv_priv;
279         struct cx25821_dev *dev = chan->dev;
280         struct cx25821_dmaqueue *dmaq = &dev->channels[chan->id].dma_vidq;
281         struct cx25821_buffer *buf = list_entry(dmaq->active.next,
282                         struct cx25821_buffer, queue);
283
284         dmaq->count = 0;
285         cx25821_start_video_dma(dev, dmaq, buf, chan->sram_channels);
286         return 0;
287 }
288
289 static void cx25821_stop_streaming(struct vb2_queue *q)
290 {
291         struct cx25821_channel *chan = q->drv_priv;
292         struct cx25821_dev *dev = chan->dev;
293         struct cx25821_dmaqueue *dmaq = &dev->channels[chan->id].dma_vidq;
294         unsigned long flags;
295
296         cx_write(chan->sram_channels->dma_ctl, 0); /* FIFO and RISC disable */
297         spin_lock_irqsave(&dev->slock, flags);
298         while (!list_empty(&dmaq->active)) {
299                 struct cx25821_buffer *buf = list_entry(dmaq->active.next,
300                         struct cx25821_buffer, queue);
301
302                 list_del(&buf->queue);
303                 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
304         }
305         spin_unlock_irqrestore(&dev->slock, flags);
306 }
307
308 static struct vb2_ops cx25821_video_qops = {
309         .queue_setup    = cx25821_queue_setup,
310         .buf_prepare  = cx25821_buffer_prepare,
311         .buf_finish = cx25821_buffer_finish,
312         .buf_queue    = cx25821_buffer_queue,
313         .wait_prepare = vb2_ops_wait_prepare,
314         .wait_finish = vb2_ops_wait_finish,
315         .start_streaming = cx25821_start_streaming,
316         .stop_streaming = cx25821_stop_streaming,
317 };
318
319 /* VIDEO IOCTLS */
320
321 static int cx25821_vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
322                             struct v4l2_fmtdesc *f)
323 {
324         if (unlikely(f->index >= ARRAY_SIZE(formats)))
325                 return -EINVAL;
326
327         strlcpy(f->description, formats[f->index].name, sizeof(f->description));
328         f->pixelformat = formats[f->index].fourcc;
329
330         return 0;
331 }
332
333 static int cx25821_vidioc_g_fmt_vid_cap(struct file *file, void *priv,
334                                  struct v4l2_format *f)
335 {
336         struct cx25821_channel *chan = video_drvdata(file);
337
338         f->fmt.pix.width = chan->width;
339         f->fmt.pix.height = chan->height;
340         f->fmt.pix.field = chan->field;
341         f->fmt.pix.pixelformat = chan->fmt->fourcc;
342         f->fmt.pix.bytesperline = (chan->width * chan->fmt->depth) >> 3;
343         f->fmt.pix.sizeimage = chan->height * f->fmt.pix.bytesperline;
344         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
345
346         return 0;
347 }
348
349 static int cx25821_vidioc_try_fmt_vid_cap(struct file *file, void *priv,
350                                    struct v4l2_format *f)
351 {
352         struct cx25821_channel *chan = video_drvdata(file);
353         struct cx25821_dev *dev = chan->dev;
354         const struct cx25821_fmt *fmt;
355         enum v4l2_field field = f->fmt.pix.field;
356         unsigned int maxh;
357         unsigned w;
358
359         fmt = cx25821_format_by_fourcc(f->fmt.pix.pixelformat);
360         if (NULL == fmt)
361                 return -EINVAL;
362         maxh = (dev->tvnorm & V4L2_STD_625_50) ? 576 : 480;
363
364         w = f->fmt.pix.width;
365         if (field != V4L2_FIELD_BOTTOM)
366                 field = V4L2_FIELD_TOP;
367         if (w < 352) {
368                 w = 176;
369                 f->fmt.pix.height = maxh / 4;
370         } else if (w < 720) {
371                 w = 352;
372                 f->fmt.pix.height = maxh / 2;
373         } else {
374                 w = 720;
375                 f->fmt.pix.height = maxh;
376                 field = V4L2_FIELD_INTERLACED;
377         }
378         f->fmt.pix.field = field;
379         f->fmt.pix.width = w;
380         f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3;
381         f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
382         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
383
384         return 0;
385 }
386
387 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
388                                 struct v4l2_format *f)
389 {
390         struct cx25821_channel *chan = video_drvdata(file);
391         struct cx25821_dev *dev = chan->dev;
392         int pix_format = PIXEL_FRMT_422;
393         int err;
394
395         err = cx25821_vidioc_try_fmt_vid_cap(file, priv, f);
396
397         if (0 != err)
398                 return err;
399
400         chan->fmt = cx25821_format_by_fourcc(f->fmt.pix.pixelformat);
401         chan->field = f->fmt.pix.field;
402         chan->width = f->fmt.pix.width;
403         chan->height = f->fmt.pix.height;
404
405         if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_Y41P)
406                 pix_format = PIXEL_FRMT_411;
407         else
408                 pix_format = PIXEL_FRMT_422;
409
410         cx25821_set_pixel_format(dev, SRAM_CH00, pix_format);
411
412         /* check if cif resolution */
413         if (chan->width == 320 || chan->width == 352)
414                 chan->use_cif_resolution = 1;
415         else
416                 chan->use_cif_resolution = 0;
417
418         chan->cif_width = chan->width;
419         medusa_set_resolution(dev, chan->width, SRAM_CH00);
420         return 0;
421 }
422
423 static int vidioc_log_status(struct file *file, void *priv)
424 {
425         struct cx25821_channel *chan = video_drvdata(file);
426         struct cx25821_dev *dev = chan->dev;
427         const struct sram_channel *sram_ch = chan->sram_channels;
428         u32 tmp = 0;
429
430         tmp = cx_read(sram_ch->dma_ctl);
431         pr_info("Video input 0 is %s\n",
432                 (tmp & 0x11) ? "streaming" : "stopped");
433         return 0;
434 }
435
436
437 static int cx25821_vidioc_querycap(struct file *file, void *priv,
438                             struct v4l2_capability *cap)
439 {
440         struct cx25821_channel *chan = video_drvdata(file);
441         struct cx25821_dev *dev = chan->dev;
442         const u32 cap_input = V4L2_CAP_VIDEO_CAPTURE |
443                         V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
444         const u32 cap_output = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_READWRITE;
445
446         strcpy(cap->driver, "cx25821");
447         strlcpy(cap->card, cx25821_boards[dev->board].name, sizeof(cap->card));
448         sprintf(cap->bus_info, "PCIe:%s", pci_name(dev->pci));
449         if (chan->id >= VID_CHANNEL_NUM)
450                 cap->device_caps = cap_output;
451         else
452                 cap->device_caps = cap_input;
453         cap->capabilities = cap_input | cap_output | V4L2_CAP_DEVICE_CAPS;
454         return 0;
455 }
456
457 static int cx25821_vidioc_g_std(struct file *file, void *priv, v4l2_std_id *tvnorms)
458 {
459         struct cx25821_channel *chan = video_drvdata(file);
460
461         *tvnorms = chan->dev->tvnorm;
462         return 0;
463 }
464
465 static int cx25821_vidioc_s_std(struct file *file, void *priv,
466                                 v4l2_std_id tvnorms)
467 {
468         struct cx25821_channel *chan = video_drvdata(file);
469         struct cx25821_dev *dev = chan->dev;
470
471         if (dev->tvnorm == tvnorms)
472                 return 0;
473
474         dev->tvnorm = tvnorms;
475         chan->width = 720;
476         chan->height = (dev->tvnorm & V4L2_STD_625_50) ? 576 : 480;
477
478         medusa_set_videostandard(dev);
479
480         return 0;
481 }
482
483 static int cx25821_vidioc_enum_input(struct file *file, void *priv,
484                               struct v4l2_input *i)
485 {
486         if (i->index)
487                 return -EINVAL;
488
489         i->type = V4L2_INPUT_TYPE_CAMERA;
490         i->std = CX25821_NORMS;
491         strcpy(i->name, "Composite");
492         return 0;
493 }
494
495 static int cx25821_vidioc_g_input(struct file *file, void *priv, unsigned int *i)
496 {
497         *i = 0;
498         return 0;
499 }
500
501 static int cx25821_vidioc_s_input(struct file *file, void *priv, unsigned int i)
502 {
503         return i ? -EINVAL : 0;
504 }
505
506 static int cx25821_s_ctrl(struct v4l2_ctrl *ctrl)
507 {
508         struct cx25821_channel *chan =
509                 container_of(ctrl->handler, struct cx25821_channel, hdl);
510         struct cx25821_dev *dev = chan->dev;
511
512         switch (ctrl->id) {
513         case V4L2_CID_BRIGHTNESS:
514                 medusa_set_brightness(dev, ctrl->val, chan->id);
515                 break;
516         case V4L2_CID_HUE:
517                 medusa_set_hue(dev, ctrl->val, chan->id);
518                 break;
519         case V4L2_CID_CONTRAST:
520                 medusa_set_contrast(dev, ctrl->val, chan->id);
521                 break;
522         case V4L2_CID_SATURATION:
523                 medusa_set_saturation(dev, ctrl->val, chan->id);
524                 break;
525         default:
526                 return -EINVAL;
527         }
528         return 0;
529 }
530
531 static int cx25821_vidioc_enum_output(struct file *file, void *priv,
532                               struct v4l2_output *o)
533 {
534         if (o->index)
535                 return -EINVAL;
536
537         o->type = V4L2_INPUT_TYPE_CAMERA;
538         o->std = CX25821_NORMS;
539         strcpy(o->name, "Composite");
540         return 0;
541 }
542
543 static int cx25821_vidioc_g_output(struct file *file, void *priv, unsigned int *o)
544 {
545         *o = 0;
546         return 0;
547 }
548
549 static int cx25821_vidioc_s_output(struct file *file, void *priv, unsigned int o)
550 {
551         return o ? -EINVAL : 0;
552 }
553
554 static int cx25821_vidioc_try_fmt_vid_out(struct file *file, void *priv,
555                                    struct v4l2_format *f)
556 {
557         struct cx25821_channel *chan = video_drvdata(file);
558         struct cx25821_dev *dev = chan->dev;
559         const struct cx25821_fmt *fmt;
560
561         fmt = cx25821_format_by_fourcc(f->fmt.pix.pixelformat);
562         if (NULL == fmt)
563                 return -EINVAL;
564         f->fmt.pix.width = 720;
565         f->fmt.pix.height = (dev->tvnorm & V4L2_STD_625_50) ? 576 : 480;
566         f->fmt.pix.field = V4L2_FIELD_INTERLACED;
567         f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3;
568         f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
569         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
570         return 0;
571 }
572
573 static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
574                                 struct v4l2_format *f)
575 {
576         struct cx25821_channel *chan = video_drvdata(file);
577         int err;
578
579         err = cx25821_vidioc_try_fmt_vid_out(file, priv, f);
580
581         if (0 != err)
582                 return err;
583
584         chan->fmt = cx25821_format_by_fourcc(f->fmt.pix.pixelformat);
585         chan->field = f->fmt.pix.field;
586         chan->width = f->fmt.pix.width;
587         chan->height = f->fmt.pix.height;
588         if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_Y41P)
589                 chan->pixel_formats = PIXEL_FRMT_411;
590         else
591                 chan->pixel_formats = PIXEL_FRMT_422;
592         return 0;
593 }
594
595 static const struct v4l2_ctrl_ops cx25821_ctrl_ops = {
596         .s_ctrl = cx25821_s_ctrl,
597 };
598
599 static const struct v4l2_file_operations video_fops = {
600         .owner = THIS_MODULE,
601         .open = v4l2_fh_open,
602         .release        = vb2_fop_release,
603         .read           = vb2_fop_read,
604         .poll           = vb2_fop_poll,
605         .unlocked_ioctl = video_ioctl2,
606         .mmap           = vb2_fop_mmap,
607 };
608
609 static const struct v4l2_ioctl_ops video_ioctl_ops = {
610         .vidioc_querycap = cx25821_vidioc_querycap,
611         .vidioc_enum_fmt_vid_cap = cx25821_vidioc_enum_fmt_vid_cap,
612         .vidioc_g_fmt_vid_cap = cx25821_vidioc_g_fmt_vid_cap,
613         .vidioc_try_fmt_vid_cap = cx25821_vidioc_try_fmt_vid_cap,
614         .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
615         .vidioc_reqbufs       = vb2_ioctl_reqbufs,
616         .vidioc_prepare_buf   = vb2_ioctl_prepare_buf,
617         .vidioc_create_bufs   = vb2_ioctl_create_bufs,
618         .vidioc_querybuf      = vb2_ioctl_querybuf,
619         .vidioc_qbuf          = vb2_ioctl_qbuf,
620         .vidioc_dqbuf         = vb2_ioctl_dqbuf,
621         .vidioc_streamon      = vb2_ioctl_streamon,
622         .vidioc_streamoff     = vb2_ioctl_streamoff,
623         .vidioc_g_std = cx25821_vidioc_g_std,
624         .vidioc_s_std = cx25821_vidioc_s_std,
625         .vidioc_enum_input = cx25821_vidioc_enum_input,
626         .vidioc_g_input = cx25821_vidioc_g_input,
627         .vidioc_s_input = cx25821_vidioc_s_input,
628         .vidioc_log_status = vidioc_log_status,
629         .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
630         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
631 };
632
633 static const struct video_device cx25821_video_device = {
634         .name = "cx25821-video",
635         .fops = &video_fops,
636         .release = video_device_release_empty,
637         .minor = -1,
638         .ioctl_ops = &video_ioctl_ops,
639         .tvnorms = CX25821_NORMS,
640 };
641
642 static const struct v4l2_file_operations video_out_fops = {
643         .owner = THIS_MODULE,
644         .open = v4l2_fh_open,
645         .release        = vb2_fop_release,
646         .write          = vb2_fop_write,
647         .poll           = vb2_fop_poll,
648         .unlocked_ioctl = video_ioctl2,
649         .mmap           = vb2_fop_mmap,
650 };
651
652 static const struct v4l2_ioctl_ops video_out_ioctl_ops = {
653         .vidioc_querycap = cx25821_vidioc_querycap,
654         .vidioc_enum_fmt_vid_out = cx25821_vidioc_enum_fmt_vid_cap,
655         .vidioc_g_fmt_vid_out = cx25821_vidioc_g_fmt_vid_cap,
656         .vidioc_try_fmt_vid_out = cx25821_vidioc_try_fmt_vid_out,
657         .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
658         .vidioc_g_std = cx25821_vidioc_g_std,
659         .vidioc_s_std = cx25821_vidioc_s_std,
660         .vidioc_enum_output = cx25821_vidioc_enum_output,
661         .vidioc_g_output = cx25821_vidioc_g_output,
662         .vidioc_s_output = cx25821_vidioc_s_output,
663         .vidioc_log_status = vidioc_log_status,
664 };
665
666 static const struct video_device cx25821_video_out_device = {
667         .name = "cx25821-video",
668         .fops = &video_out_fops,
669         .release = video_device_release_empty,
670         .minor = -1,
671         .ioctl_ops = &video_out_ioctl_ops,
672         .tvnorms = CX25821_NORMS,
673 };
674
675 void cx25821_video_unregister(struct cx25821_dev *dev, int chan_num)
676 {
677         cx_clear(PCI_INT_MSK, 1);
678
679         if (video_is_registered(&dev->channels[chan_num].vdev)) {
680                 video_unregister_device(&dev->channels[chan_num].vdev);
681                 v4l2_ctrl_handler_free(&dev->channels[chan_num].hdl);
682         }
683 }
684
685 int cx25821_video_register(struct cx25821_dev *dev)
686 {
687         int err;
688         int i;
689
690         /* initial device configuration */
691         dev->tvnorm = V4L2_STD_NTSC_M;
692
693         spin_lock_init(&dev->slock);
694
695         for (i = 0; i < MAX_VID_CAP_CHANNEL_NUM - 1; ++i) {
696                 struct cx25821_channel *chan = &dev->channels[i];
697                 struct video_device *vdev = &chan->vdev;
698                 struct v4l2_ctrl_handler *hdl = &chan->hdl;
699                 struct vb2_queue *q;
700                 bool is_output = i > SRAM_CH08;
701
702                 if (i == SRAM_CH08) /* audio channel */
703                         continue;
704
705                 if (!is_output) {
706                         v4l2_ctrl_handler_init(hdl, 4);
707                         v4l2_ctrl_new_std(hdl, &cx25821_ctrl_ops,
708                                         V4L2_CID_BRIGHTNESS, 0, 10000, 1, 6200);
709                         v4l2_ctrl_new_std(hdl, &cx25821_ctrl_ops,
710                                         V4L2_CID_CONTRAST, 0, 10000, 1, 5000);
711                         v4l2_ctrl_new_std(hdl, &cx25821_ctrl_ops,
712                                         V4L2_CID_SATURATION, 0, 10000, 1, 5000);
713                         v4l2_ctrl_new_std(hdl, &cx25821_ctrl_ops,
714                                         V4L2_CID_HUE, 0, 10000, 1, 5000);
715                         if (hdl->error) {
716                                 err = hdl->error;
717                                 goto fail_unreg;
718                         }
719                         err = v4l2_ctrl_handler_setup(hdl);
720                         if (err)
721                                 goto fail_unreg;
722                 } else {
723                         chan->out = &dev->vid_out_data[i - SRAM_CH09];
724                         chan->out->chan = chan;
725                 }
726
727                 chan->sram_channels = &cx25821_sram_channels[i];
728                 chan->width = 720;
729                 chan->field = V4L2_FIELD_INTERLACED;
730                 if (dev->tvnorm & V4L2_STD_625_50)
731                         chan->height = 576;
732                 else
733                         chan->height = 480;
734
735                 if (chan->pixel_formats == PIXEL_FRMT_411)
736                         chan->fmt = cx25821_format_by_fourcc(V4L2_PIX_FMT_Y41P);
737                 else
738                         chan->fmt = cx25821_format_by_fourcc(V4L2_PIX_FMT_YUYV);
739
740                 cx_write(chan->sram_channels->int_stat, 0xffffffff);
741
742                 INIT_LIST_HEAD(&chan->dma_vidq.active);
743
744                 q = &chan->vidq;
745
746                 q->type = is_output ? V4L2_BUF_TYPE_VIDEO_OUTPUT :
747                                       V4L2_BUF_TYPE_VIDEO_CAPTURE;
748                 q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
749                 q->io_modes |= is_output ? VB2_WRITE : VB2_READ;
750                 q->gfp_flags = GFP_DMA32;
751                 q->min_buffers_needed = 2;
752                 q->drv_priv = chan;
753                 q->buf_struct_size = sizeof(struct cx25821_buffer);
754                 q->ops = &cx25821_video_qops;
755                 q->mem_ops = &vb2_dma_sg_memops;
756                 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
757                 q->lock = &dev->lock;
758
759                 if (!is_output) {
760                         err = vb2_queue_init(q);
761                         if (err < 0)
762                                 goto fail_unreg;
763                 }
764
765                 /* register v4l devices */
766                 *vdev = is_output ? cx25821_video_out_device : cx25821_video_device;
767                 vdev->v4l2_dev = &dev->v4l2_dev;
768                 if (!is_output)
769                         vdev->ctrl_handler = hdl;
770                 else
771                         vdev->vfl_dir = VFL_DIR_TX;
772                 vdev->lock = &dev->lock;
773                 vdev->queue = q;
774                 snprintf(vdev->name, sizeof(vdev->name), "%s #%d", dev->name, i);
775                 video_set_drvdata(vdev, chan);
776
777                 err = video_register_device(vdev, VFL_TYPE_GRABBER,
778                                             video_nr[dev->nr]);
779
780                 if (err < 0)
781                         goto fail_unreg;
782         }
783
784         /* set PCI interrupt */
785         cx_set(PCI_INT_MSK, 0xff);
786
787         return 0;
788
789 fail_unreg:
790         while (i >= 0)
791                 cx25821_video_unregister(dev, i--);
792         return err;
793 }