Merge branch 'topic/hda' into for-linus
[linux-2.6] / 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@radix.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         .ioctl = cx18_v4l2_ioctl,
45         .release = cx18_v4l2_close,
46         .poll = cx18_v4l2_enc_poll,
47 };
48
49 /* offset from 0 to register ts v4l2 minors on */
50 #define CX18_V4L2_ENC_TS_OFFSET   16
51 /* offset from 0 to register pcm v4l2 minors on */
52 #define CX18_V4L2_ENC_PCM_OFFSET  24
53 /* offset from 0 to register yuv v4l2 minors on */
54 #define CX18_V4L2_ENC_YUV_OFFSET  32
55
56 static struct {
57         const char *name;
58         int vfl_type;
59         int num_offset;
60         int dma;
61         enum v4l2_buf_type buf_type;
62 } cx18_stream_info[] = {
63         {       /* CX18_ENC_STREAM_TYPE_MPG */
64                 "encoder MPEG",
65                 VFL_TYPE_GRABBER, 0,
66                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
67         },
68         {       /* CX18_ENC_STREAM_TYPE_TS */
69                 "TS",
70                 VFL_TYPE_GRABBER, -1,
71                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
72         },
73         {       /* CX18_ENC_STREAM_TYPE_YUV */
74                 "encoder YUV",
75                 VFL_TYPE_GRABBER, CX18_V4L2_ENC_YUV_OFFSET,
76                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
77         },
78         {       /* CX18_ENC_STREAM_TYPE_VBI */
79                 "encoder VBI",
80                 VFL_TYPE_VBI, 0,
81                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VBI_CAPTURE,
82         },
83         {       /* CX18_ENC_STREAM_TYPE_PCM */
84                 "encoder PCM audio",
85                 VFL_TYPE_GRABBER, CX18_V4L2_ENC_PCM_OFFSET,
86                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_PRIVATE,
87         },
88         {       /* CX18_ENC_STREAM_TYPE_IDX */
89                 "encoder IDX",
90                 VFL_TYPE_GRABBER, -1,
91                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
92         },
93         {       /* CX18_ENC_STREAM_TYPE_RAD */
94                 "encoder radio",
95                 VFL_TYPE_RADIO, 0,
96                 PCI_DMA_NONE, V4L2_BUF_TYPE_PRIVATE,
97         },
98 };
99
100 static void cx18_stream_init(struct cx18 *cx, int type)
101 {
102         struct cx18_stream *s = &cx->streams[type];
103         struct video_device *video_dev = s->video_dev;
104
105         /* we need to keep video_dev, so restore it afterwards */
106         memset(s, 0, sizeof(*s));
107         s->video_dev = video_dev;
108
109         /* initialize cx18_stream fields */
110         s->cx = cx;
111         s->type = type;
112         s->name = cx18_stream_info[type].name;
113         s->handle = CX18_INVALID_TASK_HANDLE;
114
115         s->dma = cx18_stream_info[type].dma;
116         s->buffers = cx->stream_buffers[type];
117         s->buf_size = cx->stream_buf_size[type];
118
119         mutex_init(&s->qlock);
120         init_waitqueue_head(&s->waitq);
121         s->id = -1;
122         cx18_queue_init(&s->q_free);
123         cx18_queue_init(&s->q_busy);
124         cx18_queue_init(&s->q_full);
125 }
126
127 static int cx18_prep_dev(struct cx18 *cx, int type)
128 {
129         struct cx18_stream *s = &cx->streams[type];
130         u32 cap = cx->v4l2_cap;
131         int num_offset = cx18_stream_info[type].num_offset;
132         int num = cx->instance + cx18_first_minor + num_offset;
133
134         /* These four fields are always initialized. If video_dev == NULL, then
135            this stream is not in use. In that case no other fields but these
136            four can be used. */
137         s->video_dev = NULL;
138         s->cx = cx;
139         s->type = type;
140         s->name = cx18_stream_info[type].name;
141
142         /* Check whether the radio is supported */
143         if (type == CX18_ENC_STREAM_TYPE_RAD && !(cap & V4L2_CAP_RADIO))
144                 return 0;
145
146         /* Check whether VBI is supported */
147         if (type == CX18_ENC_STREAM_TYPE_VBI &&
148             !(cap & (V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_CAPTURE)))
149                 return 0;
150
151         /* User explicitly selected 0 buffers for these streams, so don't
152            create them. */
153         if (cx18_stream_info[type].dma != PCI_DMA_NONE &&
154             cx->stream_buffers[type] == 0) {
155                 CX18_INFO("Disabled %s device\n", cx18_stream_info[type].name);
156                 return 0;
157         }
158
159         cx18_stream_init(cx, type);
160
161         if (num_offset == -1)
162                 return 0;
163
164         /* allocate and initialize the v4l2 video device structure */
165         s->video_dev = video_device_alloc();
166         if (s->video_dev == NULL) {
167                 CX18_ERR("Couldn't allocate v4l2 video_device for %s\n",
168                                 s->name);
169                 return -ENOMEM;
170         }
171
172         snprintf(s->video_dev->name, sizeof(s->video_dev->name), "%s %s",
173                  cx->v4l2_dev.name, s->name);
174
175         s->video_dev->num = num;
176         s->video_dev->v4l2_dev = &cx->v4l2_dev;
177         s->video_dev->fops = &cx18_v4l2_enc_fops;
178         s->video_dev->release = video_device_release;
179         s->video_dev->tvnorms = V4L2_STD_ALL;
180         cx18_set_funcs(s->video_dev);
181         return 0;
182 }
183
184 /* Initialize v4l2 variables and register v4l2 devices */
185 int cx18_streams_setup(struct cx18 *cx)
186 {
187         int type, ret;
188
189         /* Setup V4L2 Devices */
190         for (type = 0; type < CX18_MAX_STREAMS; type++) {
191                 /* Prepare device */
192                 ret = cx18_prep_dev(cx, type);
193                 if (ret < 0)
194                         break;
195
196                 /* Allocate Stream */
197                 ret = cx18_stream_alloc(&cx->streams[type]);
198                 if (ret < 0)
199                         break;
200         }
201         if (type == CX18_MAX_STREAMS)
202                 return 0;
203
204         /* One or more streams could not be initialized. Clean 'em all up. */
205         cx18_streams_cleanup(cx, 0);
206         return ret;
207 }
208
209 static int cx18_reg_dev(struct cx18 *cx, int type)
210 {
211         struct cx18_stream *s = &cx->streams[type];
212         int vfl_type = cx18_stream_info[type].vfl_type;
213         int num, ret;
214
215         /* TODO: Shouldn't this be a VFL_TYPE_TRANSPORT or something?
216          * We need a VFL_TYPE_TS defined.
217          */
218         if (strcmp("TS", s->name) == 0) {
219                 /* just return if no DVB is supported */
220                 if ((cx->card->hw_all & CX18_HW_DVB) == 0)
221                         return 0;
222                 ret = cx18_dvb_register(s);
223                 if (ret < 0) {
224                         CX18_ERR("DVB failed to register\n");
225                         return ret;
226                 }
227         }
228
229         if (s->video_dev == NULL)
230                 return 0;
231
232         num = s->video_dev->num;
233         /* card number + user defined offset + device offset */
234         if (type != CX18_ENC_STREAM_TYPE_MPG) {
235                 struct cx18_stream *s_mpg = &cx->streams[CX18_ENC_STREAM_TYPE_MPG];
236
237                 if (s_mpg->video_dev)
238                         num = s_mpg->video_dev->num
239                             + cx18_stream_info[type].num_offset;
240         }
241         video_set_drvdata(s->video_dev, s);
242
243         /* Register device. First try the desired minor, then any free one. */
244         ret = video_register_device(s->video_dev, vfl_type, num);
245         if (ret < 0) {
246                 CX18_ERR("Couldn't register v4l2 device for %s kernel number %d\n",
247                         s->name, num);
248                 video_device_release(s->video_dev);
249                 s->video_dev = NULL;
250                 return ret;
251         }
252         num = s->video_dev->num;
253
254         switch (vfl_type) {
255         case VFL_TYPE_GRABBER:
256                 CX18_INFO("Registered device video%d for %s (%d x %d kB)\n",
257                           num, s->name, cx->stream_buffers[type],
258                           cx->stream_buf_size[type]/1024);
259                 break;
260
261         case VFL_TYPE_RADIO:
262                 CX18_INFO("Registered device radio%d for %s\n",
263                         num, s->name);
264                 break;
265
266         case VFL_TYPE_VBI:
267                 if (cx->stream_buffers[type])
268                         CX18_INFO("Registered device vbi%d for %s "
269                                   "(%d x %d bytes)\n",
270                                   num, s->name, cx->stream_buffers[type],
271                                   cx->stream_buf_size[type]);
272                 else
273                         CX18_INFO("Registered device vbi%d for %s\n",
274                                 num, s->name);
275                 break;
276         }
277
278         return 0;
279 }
280
281 /* Register v4l2 devices */
282 int cx18_streams_register(struct cx18 *cx)
283 {
284         int type;
285         int err;
286         int ret = 0;
287
288         /* Register V4L2 devices */
289         for (type = 0; type < CX18_MAX_STREAMS; type++) {
290                 err = cx18_reg_dev(cx, type);
291                 if (err && ret == 0)
292                         ret = err;
293         }
294
295         if (ret == 0)
296                 return 0;
297
298         /* One or more streams could not be initialized. Clean 'em all up. */
299         cx18_streams_cleanup(cx, 1);
300         return ret;
301 }
302
303 /* Unregister v4l2 devices */
304 void cx18_streams_cleanup(struct cx18 *cx, int unregister)
305 {
306         struct video_device *vdev;
307         int type;
308
309         /* Teardown all streams */
310         for (type = 0; type < CX18_MAX_STREAMS; type++) {
311                 if (cx->streams[type].dvb.enabled) {
312                         cx18_dvb_unregister(&cx->streams[type]);
313                         cx->streams[type].dvb.enabled = false;
314                 }
315
316                 vdev = cx->streams[type].video_dev;
317
318                 cx->streams[type].video_dev = NULL;
319                 if (vdev == NULL)
320                         continue;
321
322                 cx18_stream_free(&cx->streams[type]);
323
324                 /* Unregister or release device */
325                 if (unregister)
326                         video_unregister_device(vdev);
327                 else
328                         video_device_release(vdev);
329         }
330 }
331
332 static void cx18_vbi_setup(struct cx18_stream *s)
333 {
334         struct cx18 *cx = s->cx;
335         int raw = cx18_raw_vbi(cx);
336         u32 data[CX2341X_MBOX_MAX_DATA];
337         int lines;
338
339         if (cx->is_60hz) {
340                 cx->vbi.count = 12;
341                 cx->vbi.start[0] = 10;
342                 cx->vbi.start[1] = 273;
343         } else {        /* PAL/SECAM */
344                 cx->vbi.count = 18;
345                 cx->vbi.start[0] = 6;
346                 cx->vbi.start[1] = 318;
347         }
348
349         /* setup VBI registers */
350         v4l2_subdev_call(cx->sd_av, video, s_fmt, &cx->vbi.in);
351
352         /*
353          * Send the CX18_CPU_SET_RAW_VBI_PARAM API command to setup Encoder Raw
354          * VBI when the first analog capture channel starts, as once it starts
355          * (e.g. MPEG), we can't effect any change in the Encoder Raw VBI setup
356          * (i.e. for the VBI capture channels).  We also send it for each
357          * analog capture channel anyway just to make sure we get the proper
358          * behavior
359          */
360         if (raw) {
361                 lines = cx->vbi.count * 2;
362         } else {
363                 /*
364                  * For 525/60 systems, according to the VIP 2 & BT.656 std:
365                  * The EAV RP code's Field bit toggles on line 4, a few lines
366                  * after the Vertcal Blank bit has already toggled.
367                  * Tell the encoder to capture 21-4+1=18 lines per field,
368                  * since we want lines 10 through 21.
369                  *
370                  * FIXME - revisit for 625/50 systems
371                  */
372                 lines = cx->is_60hz ? (21 - 4 + 1) * 2 : 38;
373         }
374
375         data[0] = s->handle;
376         /* Lines per field */
377         data[1] = (lines / 2) | ((lines / 2) << 16);
378         /* bytes per line */
379         data[2] = (raw ? vbi_active_samples
380                        : (cx->is_60hz ? vbi_hblank_samples_60Hz
381                                       : vbi_hblank_samples_50Hz));
382         /* Every X number of frames a VBI interrupt arrives
383            (frames as in 25 or 30 fps) */
384         data[3] = 1;
385         /*
386          * Set the SAV/EAV RP codes to look for as start/stop points
387          * when in VIP-1.1 mode
388          */
389         if (raw) {
390                 /*
391                  * Start codes for beginning of "active" line in vertical blank
392                  * 0x20 (               VerticalBlank                )
393                  * 0x60 (     EvenField VerticalBlank                )
394                  */
395                 data[4] = 0x20602060;
396                 /*
397                  * End codes for end of "active" raw lines and regular lines
398                  * 0x30 (               VerticalBlank HorizontalBlank)
399                  * 0x70 (     EvenField VerticalBlank HorizontalBlank)
400                  * 0x90 (Task                         HorizontalBlank)
401                  * 0xd0 (Task EvenField               HorizontalBlank)
402                  */
403                 data[5] = 0x307090d0;
404         } else {
405                 /*
406                  * End codes for active video, we want data in the hblank region
407                  * 0xb0 (Task         0 VerticalBlank HorizontalBlank)
408                  * 0xf0 (Task EvenField VerticalBlank HorizontalBlank)
409                  *
410                  * Since the V bit is only allowed to toggle in the EAV RP code,
411                  * just before the first active region line, these two
412                  * are problematic:
413                  * 0x90 (Task                         HorizontalBlank)
414                  * 0xd0 (Task EvenField               HorizontalBlank)
415                  *
416                  * We have set the digitzer such that we don't have to worry
417                  * about these problem codes.
418                  */
419                 data[4] = 0xB0F0B0F0;
420                 /*
421                  * Start codes for beginning of active line in vertical blank
422                  * 0xa0 (Task           VerticalBlank                )
423                  * 0xe0 (Task EvenField VerticalBlank                )
424                  */
425                 data[5] = 0xA0E0A0E0;
426         }
427
428         CX18_DEBUG_INFO("Setup VBI h: %d lines %x bpl %d fr %d %x %x\n",
429                         data[0], data[1], data[2], data[3], data[4], data[5]);
430
431         cx18_api(cx, CX18_CPU_SET_RAW_VBI_PARAM, 6, data);
432 }
433
434 struct cx18_queue *cx18_stream_put_buf_fw(struct cx18_stream *s,
435                                           struct cx18_buffer *buf)
436 {
437         struct cx18 *cx = s->cx;
438         struct cx18_queue *q;
439
440         /* Don't give it to the firmware, if we're not running a capture */
441         if (s->handle == CX18_INVALID_TASK_HANDLE ||
442             !test_bit(CX18_F_S_STREAMING, &s->s_flags))
443                 return cx18_enqueue(s, buf, &s->q_free);
444
445         q = cx18_enqueue(s, buf, &s->q_busy);
446         if (q != &s->q_busy)
447                 return q; /* The firmware has the max buffers it can handle */
448
449         cx18_buf_sync_for_device(s, buf);
450         cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, s->handle,
451                   (void __iomem *) &cx->scb->cpu_mdl[buf->id] - cx->enc_mem,
452                   1, buf->id, s->buf_size);
453         return q;
454 }
455
456 void cx18_stream_load_fw_queue(struct cx18_stream *s)
457 {
458         struct cx18_queue *q;
459         struct cx18_buffer *buf;
460
461         if (atomic_read(&s->q_free.buffers) == 0 ||
462             atomic_read(&s->q_busy.buffers) >= CX18_MAX_FW_MDLS_PER_STREAM)
463                 return;
464
465         /* Move from q_free to q_busy notifying the firmware, until the limit */
466         do {
467                 buf = cx18_dequeue(s, &s->q_free);
468                 if (buf == NULL)
469                         break;
470                 q = cx18_stream_put_buf_fw(s, buf);
471         } while (atomic_read(&s->q_busy.buffers) < CX18_MAX_FW_MDLS_PER_STREAM
472                  && q == &s->q_busy);
473 }
474
475 int cx18_start_v4l2_encode_stream(struct cx18_stream *s)
476 {
477         u32 data[MAX_MB_ARGUMENTS];
478         struct cx18 *cx = s->cx;
479         struct cx18_buffer *buf;
480         int captype = 0;
481         struct cx18_api_func_private priv;
482
483         if (s->video_dev == NULL && s->dvb.enabled == 0)
484                 return -EINVAL;
485
486         CX18_DEBUG_INFO("Start encoder stream %s\n", s->name);
487
488         switch (s->type) {
489         case CX18_ENC_STREAM_TYPE_MPG:
490                 captype = CAPTURE_CHANNEL_TYPE_MPEG;
491                 cx->mpg_data_received = cx->vbi_data_inserted = 0;
492                 cx->dualwatch_jiffies = jiffies;
493                 cx->dualwatch_stereo_mode = cx->params.audio_properties & 0x300;
494                 cx->search_pack_header = 0;
495                 break;
496
497         case CX18_ENC_STREAM_TYPE_TS:
498                 captype = CAPTURE_CHANNEL_TYPE_TS;
499                 break;
500         case CX18_ENC_STREAM_TYPE_YUV:
501                 captype = CAPTURE_CHANNEL_TYPE_YUV;
502                 break;
503         case CX18_ENC_STREAM_TYPE_PCM:
504                 captype = CAPTURE_CHANNEL_TYPE_PCM;
505                 break;
506         case CX18_ENC_STREAM_TYPE_VBI:
507 #ifdef CX18_ENCODER_PARSES_SLICED
508                 captype = cx18_raw_vbi(cx) ?
509                      CAPTURE_CHANNEL_TYPE_VBI : CAPTURE_CHANNEL_TYPE_SLICED_VBI;
510 #else
511                 /*
512                  * Currently we set things up so that Sliced VBI from the
513                  * digitizer is handled as Raw VBI by the encoder
514                  */
515                 captype = CAPTURE_CHANNEL_TYPE_VBI;
516 #endif
517                 cx->vbi.frame = 0;
518                 cx->vbi.inserted_frame = 0;
519                 memset(cx->vbi.sliced_mpeg_size,
520                         0, sizeof(cx->vbi.sliced_mpeg_size));
521                 break;
522         default:
523                 return -EINVAL;
524         }
525
526         /* Clear Streamoff flags in case left from last capture */
527         clear_bit(CX18_F_S_STREAMOFF, &s->s_flags);
528
529         cx18_vapi_result(cx, data, CX18_CREATE_TASK, 1, CPU_CMD_MASK_CAPTURE);
530         s->handle = data[0];
531         cx18_vapi(cx, CX18_CPU_SET_CHANNEL_TYPE, 2, s->handle, captype);
532
533         /*
534          * For everything but CAPTURE_CHANNEL_TYPE_TS, play it safe and
535          * set up all the parameters, as it is not obvious which parameters the
536          * firmware shares across capture channel types and which it does not.
537          *
538          * Some of the cx18_vapi() calls below apply to only certain capture
539          * channel types.  We're hoping there's no harm in calling most of them
540          * anyway, as long as the values are all consistent.  Setting some
541          * shared parameters will have no effect once an analog capture channel
542          * has started streaming.
543          */
544         if (captype != CAPTURE_CHANNEL_TYPE_TS) {
545                 cx18_vapi(cx, CX18_CPU_SET_VER_CROP_LINE, 2, s->handle, 0);
546                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 3, 1);
547                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 8, 0);
548                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 4, 1);
549
550                 /*
551                  * Audio related reset according to
552                  * Documentation/video4linux/cx2341x/fw-encoder-api.txt
553                  */
554                 if (atomic_read(&cx->ana_capturing) == 0)
555                         cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2,
556                                   s->handle, 12);
557
558                 /*
559                  * Number of lines for Field 1 & Field 2 according to
560                  * Documentation/video4linux/cx2341x/fw-encoder-api.txt
561                  * Field 1 is 312 for 625 line systems in BT.656
562                  * Field 2 is 313 for 625 line systems in BT.656
563                  */
564                 cx18_vapi(cx, CX18_CPU_SET_CAPTURE_LINE_NO, 3,
565                           s->handle, 312, 313);
566
567                 if (cx->v4l2_cap & V4L2_CAP_VBI_CAPTURE)
568                         cx18_vbi_setup(s);
569
570                 /*
571                  * assign program index info.
572                  * Mask 7: select I/P/B, Num_req: 400 max
573                  * FIXME - currently we have this hardcoded as disabled
574                  */
575                 cx18_vapi_result(cx, data, CX18_CPU_SET_INDEXTABLE, 1, 0);
576
577                 /* Call out to the common CX2341x API setup for user controls */
578                 priv.cx = cx;
579                 priv.s = s;
580                 cx2341x_update(&priv, cx18_api_func, NULL, &cx->params);
581
582                 /*
583                  * When starting a capture and we're set for radio,
584                  * ensure the video is muted, despite the user control.
585                  */
586                 if (!cx->params.video_mute &&
587                     test_bit(CX18_F_I_RADIO_USER, &cx->i_flags))
588                         cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2, s->handle,
589                                   (cx->params.video_mute_yuv << 8) | 1);
590         }
591
592         if (atomic_read(&cx->tot_capturing) == 0) {
593                 clear_bit(CX18_F_I_EOS, &cx->i_flags);
594                 cx18_write_reg(cx, 7, CX18_DSP0_INTERRUPT_MASK);
595         }
596
597         cx18_vapi(cx, CX18_CPU_DE_SET_MDL_ACK, 3, s->handle,
598                 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][0] - cx->enc_mem,
599                 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][1] - cx->enc_mem);
600
601         /* Init all the cpu_mdls for this stream */
602         cx18_flush_queues(s);
603         mutex_lock(&s->qlock);
604         list_for_each_entry(buf, &s->q_free.list, list) {
605                 cx18_writel(cx, buf->dma_handle,
606                                         &cx->scb->cpu_mdl[buf->id].paddr);
607                 cx18_writel(cx, s->buf_size, &cx->scb->cpu_mdl[buf->id].length);
608         }
609         mutex_unlock(&s->qlock);
610         cx18_stream_load_fw_queue(s);
611
612         /* begin_capture */
613         if (cx18_vapi(cx, CX18_CPU_CAPTURE_START, 1, s->handle)) {
614                 CX18_DEBUG_WARN("Error starting capture!\n");
615                 /* Ensure we're really not capturing before releasing MDLs */
616                 if (s->type == CX18_ENC_STREAM_TYPE_MPG)
617                         cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, 1);
618                 else
619                         cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
620                 clear_bit(CX18_F_S_STREAMING, &s->s_flags);
621                 /* FIXME - CX18_F_S_STREAMOFF as well? */
622                 cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
623                 cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
624                 s->handle = CX18_INVALID_TASK_HANDLE;
625                 if (atomic_read(&cx->tot_capturing) == 0) {
626                         set_bit(CX18_F_I_EOS, &cx->i_flags);
627                         cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
628                 }
629                 return -EINVAL;
630         }
631
632         /* you're live! sit back and await interrupts :) */
633         if (captype != CAPTURE_CHANNEL_TYPE_TS)
634                 atomic_inc(&cx->ana_capturing);
635         atomic_inc(&cx->tot_capturing);
636         return 0;
637 }
638
639 void cx18_stop_all_captures(struct cx18 *cx)
640 {
641         int i;
642
643         for (i = CX18_MAX_STREAMS - 1; i >= 0; i--) {
644                 struct cx18_stream *s = &cx->streams[i];
645
646                 if (s->video_dev == NULL && s->dvb.enabled == 0)
647                         continue;
648                 if (test_bit(CX18_F_S_STREAMING, &s->s_flags))
649                         cx18_stop_v4l2_encode_stream(s, 0);
650         }
651 }
652
653 int cx18_stop_v4l2_encode_stream(struct cx18_stream *s, int gop_end)
654 {
655         struct cx18 *cx = s->cx;
656         unsigned long then;
657
658         if (s->video_dev == NULL && s->dvb.enabled == 0)
659                 return -EINVAL;
660
661         /* This function assumes that you are allowed to stop the capture
662            and that we are actually capturing */
663
664         CX18_DEBUG_INFO("Stop Capture\n");
665
666         if (atomic_read(&cx->tot_capturing) == 0)
667                 return 0;
668
669         if (s->type == CX18_ENC_STREAM_TYPE_MPG)
670                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, !gop_end);
671         else
672                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
673
674         then = jiffies;
675
676         if (s->type == CX18_ENC_STREAM_TYPE_MPG && gop_end) {
677                 CX18_INFO("ignoring gop_end: not (yet?) supported by the firmware\n");
678         }
679
680         if (s->type != CX18_ENC_STREAM_TYPE_TS)
681                 atomic_dec(&cx->ana_capturing);
682         atomic_dec(&cx->tot_capturing);
683
684         /* Clear capture and no-read bits */
685         clear_bit(CX18_F_S_STREAMING, &s->s_flags);
686
687         /* Tell the CX23418 it can't use our buffers anymore */
688         cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
689
690         cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
691         s->handle = CX18_INVALID_TASK_HANDLE;
692
693         if (atomic_read(&cx->tot_capturing) > 0)
694                 return 0;
695
696         cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
697         wake_up(&s->waitq);
698
699         return 0;
700 }
701
702 u32 cx18_find_handle(struct cx18 *cx)
703 {
704         int i;
705
706         /* find first available handle to be used for global settings */
707         for (i = 0; i < CX18_MAX_STREAMS; i++) {
708                 struct cx18_stream *s = &cx->streams[i];
709
710                 if (s->video_dev && (s->handle != CX18_INVALID_TASK_HANDLE))
711                         return s->handle;
712         }
713         return CX18_INVALID_TASK_HANDLE;
714 }
715
716 struct cx18_stream *cx18_handle_to_stream(struct cx18 *cx, u32 handle)
717 {
718         int i;
719         struct cx18_stream *s;
720
721         if (handle == CX18_INVALID_TASK_HANDLE)
722                 return NULL;
723
724         for (i = 0; i < CX18_MAX_STREAMS; i++) {
725                 s = &cx->streams[i];
726                 if (s->handle != handle)
727                         continue;
728                 if (s->video_dev || s->dvb.enabled)
729                         return s;
730         }
731         return NULL;
732 }