3995af71b820a3ad4da36938655ae3c096a00787
[linux-2.6.git] / drivers / media / video / cx18 / cx18-streams.c
1 /*
2  *  cx18 init/start/stop/exit stream functions
3  *
4  *  Derived from ivtv-streams.c
5  *
6  *  Copyright (C) 2007  Hans Verkuil <hverkuil@xs4all.nl>
7  *  Copyright (C) 2008  Andy Walls <awalls@md.metrocast.net>
8  *
9  *  This program is free software; you can redistribute it and/or modify
10  *  it under the terms of the GNU General Public License as published by
11  *  the Free Software Foundation; either version 2 of the License, or
12  *  (at your option) any later version.
13  *
14  *  This program is distributed in the hope that it will be useful,
15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  *  GNU General Public License for more details.
18  *
19  *  You should have received a copy of the GNU General Public License
20  *  along with this program; if not, write to the Free Software
21  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
22  *  02111-1307  USA
23  */
24
25 #include "cx18-driver.h"
26 #include "cx18-io.h"
27 #include "cx18-fileops.h"
28 #include "cx18-mailbox.h"
29 #include "cx18-i2c.h"
30 #include "cx18-queue.h"
31 #include "cx18-ioctl.h"
32 #include "cx18-streams.h"
33 #include "cx18-cards.h"
34 #include "cx18-scb.h"
35 #include "cx18-dvb.h"
36
37 #define CX18_DSP0_INTERRUPT_MASK        0xd0004C
38
39 static struct v4l2_file_operations cx18_v4l2_enc_fops = {
40         .owner = THIS_MODULE,
41         .read = cx18_v4l2_read,
42         .open = cx18_v4l2_open,
43         /* FIXME change to video_ioctl2 if serialization lock can be removed */
44         .unlocked_ioctl = cx18_v4l2_ioctl,
45         .release = cx18_v4l2_close,
46         .poll = cx18_v4l2_enc_poll,
47         .mmap = cx18_v4l2_mmap,
48 };
49
50 /* offset from 0 to register ts v4l2 minors on */
51 #define CX18_V4L2_ENC_TS_OFFSET   16
52 /* offset from 0 to register pcm v4l2 minors on */
53 #define CX18_V4L2_ENC_PCM_OFFSET  24
54 /* offset from 0 to register yuv v4l2 minors on */
55 #define CX18_V4L2_ENC_YUV_OFFSET  32
56
57 static struct {
58         const char *name;
59         int vfl_type;
60         int num_offset;
61         int dma;
62         enum v4l2_buf_type buf_type;
63 } cx18_stream_info[] = {
64         {       /* CX18_ENC_STREAM_TYPE_MPG */
65                 "encoder MPEG",
66                 VFL_TYPE_GRABBER, 0,
67                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
68         },
69         {       /* CX18_ENC_STREAM_TYPE_TS */
70                 "TS",
71                 VFL_TYPE_GRABBER, -1,
72                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
73         },
74         {       /* CX18_ENC_STREAM_TYPE_YUV */
75                 "encoder YUV",
76                 VFL_TYPE_GRABBER, CX18_V4L2_ENC_YUV_OFFSET,
77                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
78         },
79         {       /* CX18_ENC_STREAM_TYPE_VBI */
80                 "encoder VBI",
81                 VFL_TYPE_VBI, 0,
82                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VBI_CAPTURE,
83         },
84         {       /* CX18_ENC_STREAM_TYPE_PCM */
85                 "encoder PCM audio",
86                 VFL_TYPE_GRABBER, CX18_V4L2_ENC_PCM_OFFSET,
87                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_PRIVATE,
88         },
89         {       /* CX18_ENC_STREAM_TYPE_IDX */
90                 "encoder IDX",
91                 VFL_TYPE_GRABBER, -1,
92                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
93         },
94         {       /* CX18_ENC_STREAM_TYPE_RAD */
95                 "encoder radio",
96                 VFL_TYPE_RADIO, 0,
97                 PCI_DMA_NONE, V4L2_BUF_TYPE_PRIVATE,
98         },
99 };
100
101
102 void cx18_dma_free(struct videobuf_queue *q,
103         struct cx18_stream *s, struct cx18_videobuf_buffer *buf)
104 {
105         videobuf_waiton(q, &buf->vb, 0, 0);
106         videobuf_vmalloc_free(&buf->vb);
107         buf->vb.state = VIDEOBUF_NEEDS_INIT;
108 }
109
110 static int cx18_prepare_buffer(struct videobuf_queue *q,
111         struct cx18_stream *s,
112         struct cx18_videobuf_buffer *buf,
113         u32 pixelformat,
114         unsigned int width, unsigned int height,
115         enum v4l2_field field)
116 {
117         struct cx18 *cx = s->cx;
118         int rc = 0;
119
120         /* check settings */
121         buf->bytes_used = 0;
122
123         if ((width  < 48) || (height < 32))
124                 return -EINVAL;
125
126         buf->vb.size = (width * height * 2);
127         if ((buf->vb.baddr != 0) && (buf->vb.bsize < buf->vb.size))
128                 return -EINVAL;
129
130         /* alloc + fill struct (if changed) */
131         if (buf->vb.width != width || buf->vb.height != height ||
132             buf->vb.field != field || s->pixelformat != pixelformat ||
133             buf->tvnorm != cx->std) {
134
135                 buf->vb.width  = width;
136                 buf->vb.height = height;
137                 buf->vb.field  = field;
138                 buf->tvnorm    = cx->std;
139                 s->pixelformat = pixelformat;
140
141                 cx18_dma_free(q, s, buf);
142         }
143
144         if ((buf->vb.baddr != 0) && (buf->vb.bsize < buf->vb.size))
145                 return -EINVAL;
146
147         if (buf->vb.field == 0)
148                 buf->vb.field = V4L2_FIELD_INTERLACED;
149
150         if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
151                 buf->vb.width  = width;
152                 buf->vb.height = height;
153                 buf->vb.field  = field;
154                 buf->tvnorm    = cx->std;
155                 s->pixelformat = pixelformat;
156
157                 rc = videobuf_iolock(q, &buf->vb, NULL);
158                 if (rc != 0)
159                         goto fail;
160         }
161         buf->vb.state = VIDEOBUF_PREPARED;
162         return 0;
163
164 fail:
165         cx18_dma_free(q, s, buf);
166         return rc;
167
168 }
169
170 /* VB_MIN_BUFSIZE is lcm(1440 * 480, 1440 * 576)
171    1440 is a single line of 4:2:2 YUV at 720 luma samples wide
172 */
173 #define VB_MIN_BUFFERS 32
174 #define VB_MIN_BUFSIZE 4147200
175
176 static int buffer_setup(struct videobuf_queue *q,
177         unsigned int *count, unsigned int *size)
178 {
179         struct cx18_stream *s = q->priv_data;
180         struct cx18 *cx = s->cx;
181
182         *size = 2 * cx->cxhdl.width * cx->cxhdl.height;
183         if (*count == 0)
184                 *count = VB_MIN_BUFFERS;
185
186         while (*size * *count > VB_MIN_BUFFERS * VB_MIN_BUFSIZE)
187                 (*count)--;
188
189         q->field = V4L2_FIELD_INTERLACED;
190         q->last = V4L2_FIELD_INTERLACED;
191
192         return 0;
193 }
194
195 static int buffer_prepare(struct videobuf_queue *q,
196         struct videobuf_buffer *vb,
197         enum v4l2_field field)
198 {
199         struct cx18_videobuf_buffer *buf =
200                 container_of(vb, struct cx18_videobuf_buffer, vb);
201         struct cx18_stream *s = q->priv_data;
202         struct cx18 *cx = s->cx;
203
204         return cx18_prepare_buffer(q, s, buf, s->pixelformat,
205                 cx->cxhdl.width, cx->cxhdl.height, field);
206 }
207
208 static void buffer_release(struct videobuf_queue *q,
209         struct videobuf_buffer *vb)
210 {
211         struct cx18_videobuf_buffer *buf =
212                 container_of(vb, struct cx18_videobuf_buffer, vb);
213         struct cx18_stream *s = q->priv_data;
214
215         cx18_dma_free(q, s, buf);
216 }
217
218 static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
219 {
220         struct cx18_videobuf_buffer *buf =
221                 container_of(vb, struct cx18_videobuf_buffer, vb);
222         struct cx18_stream *s = q->priv_data;
223
224         buf->vb.state = VIDEOBUF_QUEUED;
225
226         list_add_tail(&buf->vb.queue, &s->vb_capture);
227 }
228
229 static struct videobuf_queue_ops cx18_videobuf_qops = {
230         .buf_setup    = buffer_setup,
231         .buf_prepare  = buffer_prepare,
232         .buf_queue    = buffer_queue,
233         .buf_release  = buffer_release,
234 };
235
236 static void cx18_stream_init(struct cx18 *cx, int type)
237 {
238         struct cx18_stream *s = &cx->streams[type];
239         struct video_device *video_dev = s->video_dev;
240
241         /* we need to keep video_dev, so restore it afterwards */
242         memset(s, 0, sizeof(*s));
243         s->video_dev = video_dev;
244
245         /* initialize cx18_stream fields */
246         s->dvb = NULL;
247         s->cx = cx;
248         s->type = type;
249         s->name = cx18_stream_info[type].name;
250         s->handle = CX18_INVALID_TASK_HANDLE;
251
252         s->dma = cx18_stream_info[type].dma;
253         s->buffers = cx->stream_buffers[type];
254         s->buf_size = cx->stream_buf_size[type];
255         INIT_LIST_HEAD(&s->buf_pool);
256         s->bufs_per_mdl = 1;
257         s->mdl_size = s->buf_size * s->bufs_per_mdl;
258
259         init_waitqueue_head(&s->waitq);
260         s->id = -1;
261         spin_lock_init(&s->q_free.lock);
262         cx18_queue_init(&s->q_free);
263         spin_lock_init(&s->q_busy.lock);
264         cx18_queue_init(&s->q_busy);
265         spin_lock_init(&s->q_full.lock);
266         cx18_queue_init(&s->q_full);
267         spin_lock_init(&s->q_idle.lock);
268         cx18_queue_init(&s->q_idle);
269
270         INIT_WORK(&s->out_work_order, cx18_out_work_handler);
271
272         INIT_LIST_HEAD(&s->vb_capture);
273         s->vb_timeout.function = cx18_vb_timeout;
274         s->vb_timeout.data = (unsigned long)s;
275         init_timer(&s->vb_timeout);
276         spin_lock_init(&s->vb_lock);
277         if (type == CX18_ENC_STREAM_TYPE_YUV) {
278                 s->vb_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
279                 videobuf_queue_vmalloc_init(&s->vbuf_q, &cx18_videobuf_qops,
280                         &cx->pci_dev->dev, &s->vbuf_q_lock,
281                         V4L2_BUF_TYPE_VIDEO_CAPTURE,
282                         V4L2_FIELD_INTERLACED,
283                         sizeof(struct cx18_videobuf_buffer),
284                         s, &cx->serialize_lock);
285
286                 /* Assume the previous pixel default */
287                 s->pixelformat = V4L2_PIX_FMT_HM12;
288         }
289 }
290
291 static int cx18_prep_dev(struct cx18 *cx, int type)
292 {
293         struct cx18_stream *s = &cx->streams[type];
294         u32 cap = cx->v4l2_cap;
295         int num_offset = cx18_stream_info[type].num_offset;
296         int num = cx->instance + cx18_first_minor + num_offset;
297
298         /*
299          * These five fields are always initialized.
300          * For analog capture related streams, if video_dev == NULL then the
301          * stream is not in use.
302          * For the TS stream, if dvb == NULL then the stream is not in use.
303          * In those cases no other fields but these four can be used.
304          */
305         s->video_dev = NULL;
306         s->dvb = NULL;
307         s->cx = cx;
308         s->type = type;
309         s->name = cx18_stream_info[type].name;
310
311         /* Check whether the radio is supported */
312         if (type == CX18_ENC_STREAM_TYPE_RAD && !(cap & V4L2_CAP_RADIO))
313                 return 0;
314
315         /* Check whether VBI is supported */
316         if (type == CX18_ENC_STREAM_TYPE_VBI &&
317             !(cap & (V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_CAPTURE)))
318                 return 0;
319
320         /* User explicitly selected 0 buffers for these streams, so don't
321            create them. */
322         if (cx18_stream_info[type].dma != PCI_DMA_NONE &&
323             cx->stream_buffers[type] == 0) {
324                 CX18_INFO("Disabled %s device\n", cx18_stream_info[type].name);
325                 return 0;
326         }
327
328         cx18_stream_init(cx, type);
329
330         /* Allocate the cx18_dvb struct only for the TS on cards with DTV */
331         if (type == CX18_ENC_STREAM_TYPE_TS) {
332                 if (cx->card->hw_all & CX18_HW_DVB) {
333                         s->dvb = kzalloc(sizeof(struct cx18_dvb), GFP_KERNEL);
334                         if (s->dvb == NULL) {
335                                 CX18_ERR("Couldn't allocate cx18_dvb structure"
336                                          " for %s\n", s->name);
337                                 return -ENOMEM;
338                         }
339                 } else {
340                         /* Don't need buffers for the TS, if there is no DVB */
341                         s->buffers = 0;
342                 }
343         }
344
345         if (num_offset == -1)
346                 return 0;
347
348         /* allocate and initialize the v4l2 video device structure */
349         s->video_dev = video_device_alloc();
350         if (s->video_dev == NULL) {
351                 CX18_ERR("Couldn't allocate v4l2 video_device for %s\n",
352                                 s->name);
353                 return -ENOMEM;
354         }
355
356         snprintf(s->video_dev->name, sizeof(s->video_dev->name), "%s %s",
357                  cx->v4l2_dev.name, s->name);
358
359         s->video_dev->num = num;
360         s->video_dev->v4l2_dev = &cx->v4l2_dev;
361         s->video_dev->fops = &cx18_v4l2_enc_fops;
362         s->video_dev->release = video_device_release;
363         s->video_dev->tvnorms = V4L2_STD_ALL;
364         set_bit(V4L2_FL_USE_FH_PRIO, &s->video_dev->flags);
365         cx18_set_funcs(s->video_dev);
366         return 0;
367 }
368
369 /* Initialize v4l2 variables and register v4l2 devices */
370 int cx18_streams_setup(struct cx18 *cx)
371 {
372         int type, ret;
373
374         /* Setup V4L2 Devices */
375         for (type = 0; type < CX18_MAX_STREAMS; type++) {
376                 /* Prepare device */
377                 ret = cx18_prep_dev(cx, type);
378                 if (ret < 0)
379                         break;
380
381                 /* Allocate Stream */
382                 ret = cx18_stream_alloc(&cx->streams[type]);
383                 if (ret < 0)
384                         break;
385         }
386         if (type == CX18_MAX_STREAMS)
387                 return 0;
388
389         /* One or more streams could not be initialized. Clean 'em all up. */
390         cx18_streams_cleanup(cx, 0);
391         return ret;
392 }
393
394 static int cx18_reg_dev(struct cx18 *cx, int type)
395 {
396         struct cx18_stream *s = &cx->streams[type];
397         int vfl_type = cx18_stream_info[type].vfl_type;
398         const char *name;
399         int num, ret;
400
401         if (type == CX18_ENC_STREAM_TYPE_TS && s->dvb != NULL) {
402                 ret = cx18_dvb_register(s);
403                 if (ret < 0) {
404                         CX18_ERR("DVB failed to register\n");
405                         return ret;
406                 }
407         }
408
409         if (s->video_dev == NULL)
410                 return 0;
411
412         num = s->video_dev->num;
413         /* card number + user defined offset + device offset */
414         if (type != CX18_ENC_STREAM_TYPE_MPG) {
415                 struct cx18_stream *s_mpg = &cx->streams[CX18_ENC_STREAM_TYPE_MPG];
416
417                 if (s_mpg->video_dev)
418                         num = s_mpg->video_dev->num
419                             + cx18_stream_info[type].num_offset;
420         }
421         video_set_drvdata(s->video_dev, s);
422
423         /* Register device. First try the desired minor, then any free one. */
424         ret = video_register_device_no_warn(s->video_dev, vfl_type, num);
425         if (ret < 0) {
426                 CX18_ERR("Couldn't register v4l2 device for %s (device node number %d)\n",
427                         s->name, num);
428                 video_device_release(s->video_dev);
429                 s->video_dev = NULL;
430                 return ret;
431         }
432
433         name = video_device_node_name(s->video_dev);
434
435         switch (vfl_type) {
436         case VFL_TYPE_GRABBER:
437                 CX18_INFO("Registered device %s for %s (%d x %d.%02d kB)\n",
438                           name, s->name, cx->stream_buffers[type],
439                           cx->stream_buf_size[type] / 1024,
440                           (cx->stream_buf_size[type] * 100 / 1024) % 100);
441                 break;
442
443         case VFL_TYPE_RADIO:
444                 CX18_INFO("Registered device %s for %s\n", name, s->name);
445                 break;
446
447         case VFL_TYPE_VBI:
448                 if (cx->stream_buffers[type])
449                         CX18_INFO("Registered device %s for %s "
450                                   "(%d x %d bytes)\n",
451                                   name, s->name, cx->stream_buffers[type],
452                                   cx->stream_buf_size[type]);
453                 else
454                         CX18_INFO("Registered device %s for %s\n",
455                                 name, s->name);
456                 break;
457         }
458
459         return 0;
460 }
461
462 /* Register v4l2 devices */
463 int cx18_streams_register(struct cx18 *cx)
464 {
465         int type;
466         int err;
467         int ret = 0;
468
469         /* Register V4L2 devices */
470         for (type = 0; type < CX18_MAX_STREAMS; type++) {
471                 err = cx18_reg_dev(cx, type);
472                 if (err && ret == 0)
473                         ret = err;
474         }
475
476         if (ret == 0)
477                 return 0;
478
479         /* One or more streams could not be initialized. Clean 'em all up. */
480         cx18_streams_cleanup(cx, 1);
481         return ret;
482 }
483
484 /* Unregister v4l2 devices */
485 void cx18_streams_cleanup(struct cx18 *cx, int unregister)
486 {
487         struct video_device *vdev;
488         int type;
489
490         /* Teardown all streams */
491         for (type = 0; type < CX18_MAX_STREAMS; type++) {
492
493                 /* The TS has a cx18_dvb structure, not a video_device */
494                 if (type == CX18_ENC_STREAM_TYPE_TS) {
495                         if (cx->streams[type].dvb != NULL) {
496                                 if (unregister)
497                                         cx18_dvb_unregister(&cx->streams[type]);
498                                 kfree(cx->streams[type].dvb);
499                                 cx->streams[type].dvb = NULL;
500                                 cx18_stream_free(&cx->streams[type]);
501                         }
502                         continue;
503                 }
504
505                 /* No struct video_device, but can have buffers allocated */
506                 if (type == CX18_ENC_STREAM_TYPE_IDX) {
507                         /* If the module params didn't inhibit IDX ... */
508                         if (cx->stream_buffers[type] != 0) {
509                                 cx->stream_buffers[type] = 0;
510                                 /*
511                                  * Before calling cx18_stream_free(),
512                                  * check if the IDX stream was actually set up.
513                                  * Needed, since the cx18_probe() error path
514                                  * exits through here as well as normal clean up
515                                  */
516                                 if (cx->streams[type].buffers != 0)
517                                         cx18_stream_free(&cx->streams[type]);
518                         }
519                         continue;
520                 }
521
522                 /* If struct video_device exists, can have buffers allocated */
523                 vdev = cx->streams[type].video_dev;
524
525                 cx->streams[type].video_dev = NULL;
526                 if (vdev == NULL)
527                         continue;
528
529                 if (type == CX18_ENC_STREAM_TYPE_YUV)
530                         videobuf_mmap_free(&cx->streams[type].vbuf_q);
531
532                 cx18_stream_free(&cx->streams[type]);
533
534                 /* Unregister or release device */
535                 if (unregister)
536                         video_unregister_device(vdev);
537                 else
538                         video_device_release(vdev);
539         }
540 }
541
542 static void cx18_vbi_setup(struct cx18_stream *s)
543 {
544         struct cx18 *cx = s->cx;
545         int raw = cx18_raw_vbi(cx);
546         u32 data[CX2341X_MBOX_MAX_DATA];
547         int lines;
548
549         if (cx->is_60hz) {
550                 cx->vbi.count = 12;
551                 cx->vbi.start[0] = 10;
552                 cx->vbi.start[1] = 273;
553         } else {        /* PAL/SECAM */
554                 cx->vbi.count = 18;
555                 cx->vbi.start[0] = 6;
556                 cx->vbi.start[1] = 318;
557         }
558
559         /* setup VBI registers */
560         if (raw)
561                 v4l2_subdev_call(cx->sd_av, vbi, s_raw_fmt, &cx->vbi.in.fmt.vbi);
562         else
563                 v4l2_subdev_call(cx->sd_av, vbi, s_sliced_fmt, &cx->vbi.in.fmt.sliced);
564
565         /*
566          * Send the CX18_CPU_SET_RAW_VBI_PARAM API command to setup Encoder Raw
567          * VBI when the first analog capture channel starts, as once it starts
568          * (e.g. MPEG), we can't effect any change in the Encoder Raw VBI setup
569          * (i.e. for the VBI capture channels).  We also send it for each
570          * analog capture channel anyway just to make sure we get the proper
571          * behavior
572          */
573         if (raw) {
574                 lines = cx->vbi.count * 2;
575         } else {
576                 /*
577                  * For 525/60 systems, according to the VIP 2 & BT.656 std:
578                  * The EAV RP code's Field bit toggles on line 4, a few lines
579                  * after the Vertcal Blank bit has already toggled.
580                  * Tell the encoder to capture 21-4+1=18 lines per field,
581                  * since we want lines 10 through 21.
582                  *
583                  * For 625/50 systems, according to the VIP 2 & BT.656 std:
584                  * The EAV RP code's Field bit toggles on line 1, a few lines
585                  * after the Vertcal Blank bit has already toggled.
586                  * (We've actually set the digitizer so that the Field bit
587                  * toggles on line 2.) Tell the encoder to capture 23-2+1=22
588                  * lines per field, since we want lines 6 through 23.
589                  */
590                 lines = cx->is_60hz ? (21 - 4 + 1) * 2 : (23 - 2 + 1) * 2;
591         }
592
593         data[0] = s->handle;
594         /* Lines per field */
595         data[1] = (lines / 2) | ((lines / 2) << 16);
596         /* bytes per line */
597         data[2] = (raw ? vbi_active_samples
598                        : (cx->is_60hz ? vbi_hblank_samples_60Hz
599                                       : vbi_hblank_samples_50Hz));
600         /* Every X number of frames a VBI interrupt arrives
601            (frames as in 25 or 30 fps) */
602         data[3] = 1;
603         /*
604          * Set the SAV/EAV RP codes to look for as start/stop points
605          * when in VIP-1.1 mode
606          */
607         if (raw) {
608                 /*
609                  * Start codes for beginning of "active" line in vertical blank
610                  * 0x20 (               VerticalBlank                )
611                  * 0x60 (     EvenField VerticalBlank                )
612                  */
613                 data[4] = 0x20602060;
614                 /*
615                  * End codes for end of "active" raw lines and regular lines
616                  * 0x30 (               VerticalBlank HorizontalBlank)
617                  * 0x70 (     EvenField VerticalBlank HorizontalBlank)
618                  * 0x90 (Task                         HorizontalBlank)
619                  * 0xd0 (Task EvenField               HorizontalBlank)
620                  */
621                 data[5] = 0x307090d0;
622         } else {
623                 /*
624                  * End codes for active video, we want data in the hblank region
625                  * 0xb0 (Task         0 VerticalBlank HorizontalBlank)
626                  * 0xf0 (Task EvenField VerticalBlank HorizontalBlank)
627                  *
628                  * Since the V bit is only allowed to toggle in the EAV RP code,
629                  * just before the first active region line, these two
630                  * are problematic:
631                  * 0x90 (Task                         HorizontalBlank)
632                  * 0xd0 (Task EvenField               HorizontalBlank)
633                  *
634                  * We have set the digitzer such that we don't have to worry
635                  * about these problem codes.
636                  */
637                 data[4] = 0xB0F0B0F0;
638                 /*
639                  * Start codes for beginning of active line in vertical blank
640                  * 0xa0 (Task           VerticalBlank                )
641                  * 0xe0 (Task EvenField VerticalBlank                )
642                  */
643                 data[5] = 0xA0E0A0E0;
644         }
645
646         CX18_DEBUG_INFO("Setup VBI h: %d lines %x bpl %d fr %d %x %x\n",
647                         data[0], data[1], data[2], data[3], data[4], data[5]);
648
649         cx18_api(cx, CX18_CPU_SET_RAW_VBI_PARAM, 6, data);
650 }
651
652 void cx18_stream_rotate_idx_mdls(struct cx18 *cx)
653 {
654         struct cx18_stream *s = &cx->streams[CX18_ENC_STREAM_TYPE_IDX];
655         struct cx18_mdl *mdl;
656
657         if (!cx18_stream_enabled(s))
658                 return;
659
660         /* Return if the firmware is not running low on MDLs */
661         if ((atomic_read(&s->q_free.depth) + atomic_read(&s->q_busy.depth)) >=
662                                             CX18_ENC_STREAM_TYPE_IDX_FW_MDL_MIN)
663                 return;
664
665         /* Return if there are no MDLs to rotate back to the firmware */
666         if (atomic_read(&s->q_full.depth) < 2)
667                 return;
668
669         /*
670          * Take the oldest IDX MDL still holding data, and discard its index
671          * entries by scheduling the MDL to go back to the firmware
672          */
673         mdl = cx18_dequeue(s, &s->q_full);
674         if (mdl != NULL)
675                 cx18_enqueue(s, mdl, &s->q_free);
676 }
677
678 static
679 struct cx18_queue *_cx18_stream_put_mdl_fw(struct cx18_stream *s,
680                                            struct cx18_mdl *mdl)
681 {
682         struct cx18 *cx = s->cx;
683         struct cx18_queue *q;
684
685         /* Don't give it to the firmware, if we're not running a capture */
686         if (s->handle == CX18_INVALID_TASK_HANDLE ||
687             test_bit(CX18_F_S_STOPPING, &s->s_flags) ||
688             !test_bit(CX18_F_S_STREAMING, &s->s_flags))
689                 return cx18_enqueue(s, mdl, &s->q_free);
690
691         q = cx18_enqueue(s, mdl, &s->q_busy);
692         if (q != &s->q_busy)
693                 return q; /* The firmware has the max MDLs it can handle */
694
695         cx18_mdl_sync_for_device(s, mdl);
696         cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, s->handle,
697                   (void __iomem *) &cx->scb->cpu_mdl[mdl->id] - cx->enc_mem,
698                   s->bufs_per_mdl, mdl->id, s->mdl_size);
699         return q;
700 }
701
702 static
703 void _cx18_stream_load_fw_queue(struct cx18_stream *s)
704 {
705         struct cx18_queue *q;
706         struct cx18_mdl *mdl;
707
708         if (atomic_read(&s->q_free.depth) == 0 ||
709             atomic_read(&s->q_busy.depth) >= CX18_MAX_FW_MDLS_PER_STREAM)
710                 return;
711
712         /* Move from q_free to q_busy notifying the firmware, until the limit */
713         do {
714                 mdl = cx18_dequeue(s, &s->q_free);
715                 if (mdl == NULL)
716                         break;
717                 q = _cx18_stream_put_mdl_fw(s, mdl);
718         } while (atomic_read(&s->q_busy.depth) < CX18_MAX_FW_MDLS_PER_STREAM
719                  && q == &s->q_busy);
720 }
721
722 void cx18_out_work_handler(struct work_struct *work)
723 {
724         struct cx18_stream *s =
725                          container_of(work, struct cx18_stream, out_work_order);
726
727         _cx18_stream_load_fw_queue(s);
728 }
729
730 static void cx18_stream_configure_mdls(struct cx18_stream *s)
731 {
732         cx18_unload_queues(s);
733
734         switch (s->type) {
735         case CX18_ENC_STREAM_TYPE_YUV:
736                 /*
737                  * Height should be a multiple of 32 lines.
738                  * Set the MDL size to the exact size needed for one frame.
739                  * Use enough buffers per MDL to cover the MDL size
740                  */
741                 if (s->pixelformat == V4L2_PIX_FMT_HM12)
742                         s->mdl_size = 720 * s->cx->cxhdl.height * 3 / 2;
743                 else
744                         s->mdl_size = 720 * s->cx->cxhdl.height * 2;
745                 s->bufs_per_mdl = s->mdl_size / s->buf_size;
746                 if (s->mdl_size % s->buf_size)
747                         s->bufs_per_mdl++;
748                 break;
749         case CX18_ENC_STREAM_TYPE_VBI:
750                 s->bufs_per_mdl = 1;
751                 if  (cx18_raw_vbi(s->cx)) {
752                         s->mdl_size = (s->cx->is_60hz ? 12 : 18)
753                                                        * 2 * vbi_active_samples;
754                 } else {
755                         /*
756                          * See comment in cx18_vbi_setup() below about the
757                          * extra lines we capture in sliced VBI mode due to
758                          * the lines on which EAV RP codes toggle.
759                         */
760                         s->mdl_size = s->cx->is_60hz
761                                    ? (21 - 4 + 1) * 2 * vbi_hblank_samples_60Hz
762                                    : (23 - 2 + 1) * 2 * vbi_hblank_samples_50Hz;
763                 }
764                 break;
765         default:
766                 s->bufs_per_mdl = 1;
767                 s->mdl_size = s->buf_size * s->bufs_per_mdl;
768                 break;
769         }
770
771         cx18_load_queues(s);
772 }
773
774 int cx18_start_v4l2_encode_stream(struct cx18_stream *s)
775 {
776         u32 data[MAX_MB_ARGUMENTS];
777         struct cx18 *cx = s->cx;
778         int captype = 0;
779         struct cx18_stream *s_idx;
780
781         if (!cx18_stream_enabled(s))
782                 return -EINVAL;
783
784         CX18_DEBUG_INFO("Start encoder stream %s\n", s->name);
785
786         switch (s->type) {
787         case CX18_ENC_STREAM_TYPE_MPG:
788                 captype = CAPTURE_CHANNEL_TYPE_MPEG;
789                 cx->mpg_data_received = cx->vbi_data_inserted = 0;
790                 cx->dualwatch_jiffies = jiffies;
791                 cx->dualwatch_stereo_mode = v4l2_ctrl_g_ctrl(cx->cxhdl.audio_mode);
792                 cx->search_pack_header = 0;
793                 break;
794
795         case CX18_ENC_STREAM_TYPE_IDX:
796                 captype = CAPTURE_CHANNEL_TYPE_INDEX;
797                 break;
798         case CX18_ENC_STREAM_TYPE_TS:
799                 captype = CAPTURE_CHANNEL_TYPE_TS;
800                 break;
801         case CX18_ENC_STREAM_TYPE_YUV:
802                 captype = CAPTURE_CHANNEL_TYPE_YUV;
803                 break;
804         case CX18_ENC_STREAM_TYPE_PCM:
805                 captype = CAPTURE_CHANNEL_TYPE_PCM;
806                 break;
807         case CX18_ENC_STREAM_TYPE_VBI:
808 #ifdef CX18_ENCODER_PARSES_SLICED
809                 captype = cx18_raw_vbi(cx) ?
810                      CAPTURE_CHANNEL_TYPE_VBI : CAPTURE_CHANNEL_TYPE_SLICED_VBI;
811 #else
812                 /*
813                  * Currently we set things up so that Sliced VBI from the
814                  * digitizer is handled as Raw VBI by the encoder
815                  */
816                 captype = CAPTURE_CHANNEL_TYPE_VBI;
817 #endif
818                 cx->vbi.frame = 0;
819                 cx->vbi.inserted_frame = 0;
820                 memset(cx->vbi.sliced_mpeg_size,
821                         0, sizeof(cx->vbi.sliced_mpeg_size));
822                 break;
823         default:
824                 return -EINVAL;
825         }
826
827         /* Clear Streamoff flags in case left from last capture */
828         clear_bit(CX18_F_S_STREAMOFF, &s->s_flags);
829
830         cx18_vapi_result(cx, data, CX18_CREATE_TASK, 1, CPU_CMD_MASK_CAPTURE);
831         s->handle = data[0];
832         cx18_vapi(cx, CX18_CPU_SET_CHANNEL_TYPE, 2, s->handle, captype);
833
834         /*
835          * For everything but CAPTURE_CHANNEL_TYPE_TS, play it safe and
836          * set up all the parameters, as it is not obvious which parameters the
837          * firmware shares across capture channel types and which it does not.
838          *
839          * Some of the cx18_vapi() calls below apply to only certain capture
840          * channel types.  We're hoping there's no harm in calling most of them
841          * anyway, as long as the values are all consistent.  Setting some
842          * shared parameters will have no effect once an analog capture channel
843          * has started streaming.
844          */
845         if (captype != CAPTURE_CHANNEL_TYPE_TS) {
846                 cx18_vapi(cx, CX18_CPU_SET_VER_CROP_LINE, 2, s->handle, 0);
847                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 3, 1);
848                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 8, 0);
849                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 4, 1);
850
851                 /*
852                  * Audio related reset according to
853                  * Documentation/video4linux/cx2341x/fw-encoder-api.txt
854                  */
855                 if (atomic_read(&cx->ana_capturing) == 0)
856                         cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2,
857                                   s->handle, 12);
858
859                 /*
860                  * Number of lines for Field 1 & Field 2 according to
861                  * Documentation/video4linux/cx2341x/fw-encoder-api.txt
862                  * Field 1 is 312 for 625 line systems in BT.656
863                  * Field 2 is 313 for 625 line systems in BT.656
864                  */
865                 cx18_vapi(cx, CX18_CPU_SET_CAPTURE_LINE_NO, 3,
866                           s->handle, 312, 313);
867
868                 if (cx->v4l2_cap & V4L2_CAP_VBI_CAPTURE)
869                         cx18_vbi_setup(s);
870
871                 /*
872                  * Select to receive I, P, and B frame index entries, if the
873                  * index stream is enabled.  Otherwise disable index entry
874                  * generation.
875                  */
876                 s_idx = &cx->streams[CX18_ENC_STREAM_TYPE_IDX];
877                 cx18_vapi_result(cx, data, CX18_CPU_SET_INDEXTABLE, 2,
878                                  s->handle, cx18_stream_enabled(s_idx) ? 7 : 0);
879
880                 /* Call out to the common CX2341x API setup for user controls */
881                 cx->cxhdl.priv = s;
882                 cx2341x_handler_setup(&cx->cxhdl);
883
884                 /*
885                  * When starting a capture and we're set for radio,
886                  * ensure the video is muted, despite the user control.
887                  */
888                 if (!cx->cxhdl.video_mute &&
889                     test_bit(CX18_F_I_RADIO_USER, &cx->i_flags))
890                         cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2, s->handle,
891                           (v4l2_ctrl_g_ctrl(cx->cxhdl.video_mute_yuv) << 8) | 1);
892
893                 /* Enable the Video Format Converter for UYVY 4:2:2 support,
894                  * rather than the default HM12 Macroblovk 4:2:0 support.
895                  */
896                 if (captype == CAPTURE_CHANNEL_TYPE_YUV) {
897                         if (s->pixelformat == V4L2_PIX_FMT_UYVY)
898                                 cx18_vapi(cx, CX18_CPU_SET_VFC_PARAM, 2,
899                                         s->handle, 1);
900                         else
901                                 /* If in doubt, default to HM12 */
902                                 cx18_vapi(cx, CX18_CPU_SET_VFC_PARAM, 2,
903                                         s->handle, 0);
904                 }
905         }
906
907         if (atomic_read(&cx->tot_capturing) == 0) {
908                 cx2341x_handler_set_busy(&cx->cxhdl, 1);
909                 clear_bit(CX18_F_I_EOS, &cx->i_flags);
910                 cx18_write_reg(cx, 7, CX18_DSP0_INTERRUPT_MASK);
911         }
912
913         cx18_vapi(cx, CX18_CPU_DE_SET_MDL_ACK, 3, s->handle,
914                 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][0] - cx->enc_mem,
915                 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][1] - cx->enc_mem);
916
917         /* Init all the cpu_mdls for this stream */
918         cx18_stream_configure_mdls(s);
919         _cx18_stream_load_fw_queue(s);
920
921         /* begin_capture */
922         if (cx18_vapi(cx, CX18_CPU_CAPTURE_START, 1, s->handle)) {
923                 CX18_DEBUG_WARN("Error starting capture!\n");
924                 /* Ensure we're really not capturing before releasing MDLs */
925                 set_bit(CX18_F_S_STOPPING, &s->s_flags);
926                 if (s->type == CX18_ENC_STREAM_TYPE_MPG)
927                         cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, 1);
928                 else
929                         cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
930                 clear_bit(CX18_F_S_STREAMING, &s->s_flags);
931                 /* FIXME - CX18_F_S_STREAMOFF as well? */
932                 cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
933                 cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
934                 s->handle = CX18_INVALID_TASK_HANDLE;
935                 clear_bit(CX18_F_S_STOPPING, &s->s_flags);
936                 if (atomic_read(&cx->tot_capturing) == 0) {
937                         set_bit(CX18_F_I_EOS, &cx->i_flags);
938                         cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
939                 }
940                 return -EINVAL;
941         }
942
943         /* you're live! sit back and await interrupts :) */
944         if (captype != CAPTURE_CHANNEL_TYPE_TS)
945                 atomic_inc(&cx->ana_capturing);
946         atomic_inc(&cx->tot_capturing);
947         return 0;
948 }
949 EXPORT_SYMBOL(cx18_start_v4l2_encode_stream);
950
951 void cx18_stop_all_captures(struct cx18 *cx)
952 {
953         int i;
954
955         for (i = CX18_MAX_STREAMS - 1; i >= 0; i--) {
956                 struct cx18_stream *s = &cx->streams[i];
957
958                 if (!cx18_stream_enabled(s))
959                         continue;
960                 if (test_bit(CX18_F_S_STREAMING, &s->s_flags))
961                         cx18_stop_v4l2_encode_stream(s, 0);
962         }
963 }
964
965 int cx18_stop_v4l2_encode_stream(struct cx18_stream *s, int gop_end)
966 {
967         struct cx18 *cx = s->cx;
968         unsigned long then;
969
970         if (!cx18_stream_enabled(s))
971                 return -EINVAL;
972
973         /* This function assumes that you are allowed to stop the capture
974            and that we are actually capturing */
975
976         CX18_DEBUG_INFO("Stop Capture\n");
977
978         if (atomic_read(&cx->tot_capturing) == 0)
979                 return 0;
980
981         set_bit(CX18_F_S_STOPPING, &s->s_flags);
982         if (s->type == CX18_ENC_STREAM_TYPE_MPG)
983                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, !gop_end);
984         else
985                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
986
987         then = jiffies;
988
989         if (s->type == CX18_ENC_STREAM_TYPE_MPG && gop_end) {
990                 CX18_INFO("ignoring gop_end: not (yet?) supported by the firmware\n");
991         }
992
993         if (s->type != CX18_ENC_STREAM_TYPE_TS)
994                 atomic_dec(&cx->ana_capturing);
995         atomic_dec(&cx->tot_capturing);
996
997         /* Clear capture and no-read bits */
998         clear_bit(CX18_F_S_STREAMING, &s->s_flags);
999
1000         /* Tell the CX23418 it can't use our buffers anymore */
1001         cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
1002
1003         cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
1004         s->handle = CX18_INVALID_TASK_HANDLE;
1005         clear_bit(CX18_F_S_STOPPING, &s->s_flags);
1006
1007         if (atomic_read(&cx->tot_capturing) > 0)
1008                 return 0;
1009
1010         cx2341x_handler_set_busy(&cx->cxhdl, 0);
1011         cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
1012         wake_up(&s->waitq);
1013
1014         return 0;
1015 }
1016 EXPORT_SYMBOL(cx18_stop_v4l2_encode_stream);
1017
1018 u32 cx18_find_handle(struct cx18 *cx)
1019 {
1020         int i;
1021
1022         /* find first available handle to be used for global settings */
1023         for (i = 0; i < CX18_MAX_STREAMS; i++) {
1024                 struct cx18_stream *s = &cx->streams[i];
1025
1026                 if (s->video_dev && (s->handle != CX18_INVALID_TASK_HANDLE))
1027                         return s->handle;
1028         }
1029         return CX18_INVALID_TASK_HANDLE;
1030 }
1031
1032 struct cx18_stream *cx18_handle_to_stream(struct cx18 *cx, u32 handle)
1033 {
1034         int i;
1035         struct cx18_stream *s;
1036
1037         if (handle == CX18_INVALID_TASK_HANDLE)
1038                 return NULL;
1039
1040         for (i = 0; i < CX18_MAX_STREAMS; i++) {
1041                 s = &cx->streams[i];
1042                 if (s->handle != handle)
1043                         continue;
1044                 if (cx18_stream_enabled(s))
1045                         return s;
1046         }
1047         return NULL;
1048 }