V4L/DVB (10757): cx18, v4l2-chip-ident: Finish conversion of AV decoder core to v4l2_...
[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-av-core.h"
36 #include "cx18-dvb.h"
37
38 #define CX18_DSP0_INTERRUPT_MASK        0xd0004C
39
40 static struct v4l2_file_operations cx18_v4l2_enc_fops = {
41         .owner = THIS_MODULE,
42         .read = cx18_v4l2_read,
43         .open = cx18_v4l2_open,
44         /* FIXME change to video_ioctl2 if serialization lock can be removed */
45         .ioctl = cx18_v4l2_ioctl,
46         .release = cx18_v4l2_close,
47         .poll = cx18_v4l2_enc_poll,
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 static void cx18_stream_init(struct cx18 *cx, int type)
102 {
103         struct cx18_stream *s = &cx->streams[type];
104         struct video_device *video_dev = s->video_dev;
105
106         /* we need to keep video_dev, so restore it afterwards */
107         memset(s, 0, sizeof(*s));
108         s->video_dev = video_dev;
109
110         /* initialize cx18_stream fields */
111         s->cx = cx;
112         s->type = type;
113         s->name = cx18_stream_info[type].name;
114         s->handle = CX18_INVALID_TASK_HANDLE;
115
116         s->dma = cx18_stream_info[type].dma;
117         s->buffers = cx->stream_buffers[type];
118         s->buf_size = cx->stream_buf_size[type];
119
120         mutex_init(&s->qlock);
121         init_waitqueue_head(&s->waitq);
122         s->id = -1;
123         cx18_queue_init(&s->q_free);
124         cx18_queue_init(&s->q_busy);
125         cx18_queue_init(&s->q_full);
126 }
127
128 static int cx18_prep_dev(struct cx18 *cx, int type)
129 {
130         struct cx18_stream *s = &cx->streams[type];
131         u32 cap = cx->v4l2_cap;
132         int num_offset = cx18_stream_info[type].num_offset;
133         int num = cx->instance + cx18_first_minor + num_offset;
134
135         /* These four fields are always initialized. If video_dev == NULL, then
136            this stream is not in use. In that case no other fields but these
137            four can be used. */
138         s->video_dev = NULL;
139         s->cx = cx;
140         s->type = type;
141         s->name = cx18_stream_info[type].name;
142
143         /* Check whether the radio is supported */
144         if (type == CX18_ENC_STREAM_TYPE_RAD && !(cap & V4L2_CAP_RADIO))
145                 return 0;
146
147         /* Check whether VBI is supported */
148         if (type == CX18_ENC_STREAM_TYPE_VBI &&
149             !(cap & (V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_CAPTURE)))
150                 return 0;
151
152         /* User explicitly selected 0 buffers for these streams, so don't
153            create them. */
154         if (cx18_stream_info[type].dma != PCI_DMA_NONE &&
155             cx->stream_buffers[type] == 0) {
156                 CX18_INFO("Disabled %s device\n", cx18_stream_info[type].name);
157                 return 0;
158         }
159
160         cx18_stream_init(cx, type);
161
162         if (num_offset == -1)
163                 return 0;
164
165         /* allocate and initialize the v4l2 video device structure */
166         s->video_dev = video_device_alloc();
167         if (s->video_dev == NULL) {
168                 CX18_ERR("Couldn't allocate v4l2 video_device for %s\n",
169                                 s->name);
170                 return -ENOMEM;
171         }
172
173         snprintf(s->video_dev->name, sizeof(s->video_dev->name), "%s %s",
174                  cx->v4l2_dev.name, s->name);
175
176         s->video_dev->num = num;
177         s->video_dev->v4l2_dev = &cx->v4l2_dev;
178         s->video_dev->fops = &cx18_v4l2_enc_fops;
179         s->video_dev->release = video_device_release;
180         s->video_dev->tvnorms = V4L2_STD_ALL;
181         cx18_set_funcs(s->video_dev);
182         return 0;
183 }
184
185 /* Initialize v4l2 variables and register v4l2 devices */
186 int cx18_streams_setup(struct cx18 *cx)
187 {
188         int type, ret;
189
190         /* Setup V4L2 Devices */
191         for (type = 0; type < CX18_MAX_STREAMS; type++) {
192                 /* Prepare device */
193                 ret = cx18_prep_dev(cx, type);
194                 if (ret < 0)
195                         break;
196
197                 /* Allocate Stream */
198                 ret = cx18_stream_alloc(&cx->streams[type]);
199                 if (ret < 0)
200                         break;
201         }
202         if (type == CX18_MAX_STREAMS)
203                 return 0;
204
205         /* One or more streams could not be initialized. Clean 'em all up. */
206         cx18_streams_cleanup(cx, 0);
207         return ret;
208 }
209
210 static int cx18_reg_dev(struct cx18 *cx, int type)
211 {
212         struct cx18_stream *s = &cx->streams[type];
213         int vfl_type = cx18_stream_info[type].vfl_type;
214         int num, ret;
215
216         /* TODO: Shouldn't this be a VFL_TYPE_TRANSPORT or something?
217          * We need a VFL_TYPE_TS defined.
218          */
219         if (strcmp("TS", s->name) == 0) {
220                 /* just return if no DVB is supported */
221                 if ((cx->card->hw_all & CX18_HW_DVB) == 0)
222                         return 0;
223                 ret = cx18_dvb_register(s);
224                 if (ret < 0) {
225                         CX18_ERR("DVB failed to register\n");
226                         return ret;
227                 }
228         }
229
230         if (s->video_dev == NULL)
231                 return 0;
232
233         num = s->video_dev->num;
234         /* card number + user defined offset + device offset */
235         if (type != CX18_ENC_STREAM_TYPE_MPG) {
236                 struct cx18_stream *s_mpg = &cx->streams[CX18_ENC_STREAM_TYPE_MPG];
237
238                 if (s_mpg->video_dev)
239                         num = s_mpg->video_dev->num
240                             + cx18_stream_info[type].num_offset;
241         }
242         video_set_drvdata(s->video_dev, s);
243
244         /* Register device. First try the desired minor, then any free one. */
245         ret = video_register_device(s->video_dev, vfl_type, num);
246         if (ret < 0) {
247                 CX18_ERR("Couldn't register v4l2 device for %s kernel number %d\n",
248                         s->name, num);
249                 video_device_release(s->video_dev);
250                 s->video_dev = NULL;
251                 return ret;
252         }
253         num = s->video_dev->num;
254
255         switch (vfl_type) {
256         case VFL_TYPE_GRABBER:
257                 CX18_INFO("Registered device video%d for %s (%d x %d kB)\n",
258                           num, s->name, cx->stream_buffers[type],
259                           cx->stream_buf_size[type]/1024);
260                 break;
261
262         case VFL_TYPE_RADIO:
263                 CX18_INFO("Registered device radio%d for %s\n",
264                         num, s->name);
265                 break;
266
267         case VFL_TYPE_VBI:
268                 if (cx->stream_buffers[type])
269                         CX18_INFO("Registered device vbi%d for %s "
270                                   "(%d x %d bytes)\n",
271                                   num, s->name, cx->stream_buffers[type],
272                                   cx->stream_buf_size[type]);
273                 else
274                         CX18_INFO("Registered device vbi%d for %s\n",
275                                 num, s->name);
276                 break;
277         }
278
279         return 0;
280 }
281
282 /* Register v4l2 devices */
283 int cx18_streams_register(struct cx18 *cx)
284 {
285         int type;
286         int err;
287         int ret = 0;
288
289         /* Register V4L2 devices */
290         for (type = 0; type < CX18_MAX_STREAMS; type++) {
291                 err = cx18_reg_dev(cx, type);
292                 if (err && ret == 0)
293                         ret = err;
294         }
295
296         if (ret == 0)
297                 return 0;
298
299         /* One or more streams could not be initialized. Clean 'em all up. */
300         cx18_streams_cleanup(cx, 1);
301         return ret;
302 }
303
304 /* Unregister v4l2 devices */
305 void cx18_streams_cleanup(struct cx18 *cx, int unregister)
306 {
307         struct video_device *vdev;
308         int type;
309
310         /* Teardown all streams */
311         for (type = 0; type < CX18_MAX_STREAMS; type++) {
312                 if (cx->streams[type].dvb.enabled) {
313                         cx18_dvb_unregister(&cx->streams[type]);
314                         cx->streams[type].dvb.enabled = false;
315                 }
316
317                 vdev = cx->streams[type].video_dev;
318
319                 cx->streams[type].video_dev = NULL;
320                 if (vdev == NULL)
321                         continue;
322
323                 cx18_stream_free(&cx->streams[type]);
324
325                 /* Unregister or release device */
326                 if (unregister)
327                         video_unregister_device(vdev);
328                 else
329                         video_device_release(vdev);
330         }
331 }
332
333 static void cx18_vbi_setup(struct cx18_stream *s)
334 {
335         struct cx18 *cx = s->cx;
336         int raw = cx18_raw_vbi(cx);
337         u32 data[CX2341X_MBOX_MAX_DATA];
338         int lines;
339
340         if (cx->is_60hz) {
341                 cx->vbi.count = 12;
342                 cx->vbi.start[0] = 10;
343                 cx->vbi.start[1] = 273;
344         } else {        /* PAL/SECAM */
345                 cx->vbi.count = 18;
346                 cx->vbi.start[0] = 6;
347                 cx->vbi.start[1] = 318;
348         }
349
350         /* setup VBI registers */
351         v4l2_subdev_call(cx->sd_av, video, s_fmt, &cx->vbi.in);
352
353         /*
354          * Send the CX18_CPU_SET_RAW_VBI_PARAM API command to setup Encoder Raw
355          * VBI when the first analog capture channel starts, as once it starts
356          * (e.g. MPEG), we can't effect any change in the Encoder Raw VBI setup
357          * (i.e. for the VBI capture channels).  We also send it for each
358          * analog capture channel anyway just to make sure we get the proper
359          * behavior
360          */
361         if (raw) {
362                 lines = cx->vbi.count * 2;
363         } else {
364                 /*
365                  * For 525/60 systems, according to the VIP 2 & BT.656 std:
366                  * The EAV RP code's Field bit toggles on line 4, a few lines
367                  * after the Vertcal Blank bit has already toggled.
368                  * Tell the encoder to capture 21-4+1=18 lines per field,
369                  * since we want lines 10 through 21.
370                  *
371                  * FIXME - revisit for 625/50 systems
372                  */
373                 lines = cx->is_60hz ? (21 - 4 + 1) * 2 : 38;
374         }
375
376         data[0] = s->handle;
377         /* Lines per field */
378         data[1] = (lines / 2) | ((lines / 2) << 16);
379         /* bytes per line */
380         data[2] = (raw ? vbi_active_samples
381                        : (cx->is_60hz ? vbi_hblank_samples_60Hz
382                                       : vbi_hblank_samples_50Hz));
383         /* Every X number of frames a VBI interrupt arrives
384            (frames as in 25 or 30 fps) */
385         data[3] = 1;
386         /*
387          * Set the SAV/EAV RP codes to look for as start/stop points
388          * when in VIP-1.1 mode
389          */
390         if (raw) {
391                 /*
392                  * Start codes for beginning of "active" line in vertical blank
393                  * 0x20 (               VerticalBlank                )
394                  * 0x60 (     EvenField VerticalBlank                )
395                  */
396                 data[4] = 0x20602060;
397                 /*
398                  * End codes for end of "active" raw lines and regular lines
399                  * 0x30 (               VerticalBlank HorizontalBlank)
400                  * 0x70 (     EvenField VerticalBlank HorizontalBlank)
401                  * 0x90 (Task                         HorizontalBlank)
402                  * 0xd0 (Task EvenField               HorizontalBlank)
403                  */
404                 data[5] = 0x307090d0;
405         } else {
406                 /*
407                  * End codes for active video, we want data in the hblank region
408                  * 0xb0 (Task         0 VerticalBlank HorizontalBlank)
409                  * 0xf0 (Task EvenField VerticalBlank HorizontalBlank)
410                  *
411                  * Since the V bit is only allowed to toggle in the EAV RP code,
412                  * just before the first active region line, these two
413                  * are problematic:
414                  * 0x90 (Task                         HorizontalBlank)
415                  * 0xd0 (Task EvenField               HorizontalBlank)
416                  *
417                  * We have set the digitzer to consider the first active line
418                  * as part of VerticalBlank as well so we don't have to look for
419                  * these problem codes nor lose the last line of sliced data.
420                  */
421                 data[4] = 0xB0F0B0F0;
422                 /*
423                  * Start codes for beginning of active line in vertical blank
424                  * 0xa0 (Task           VerticalBlank                )
425                  * 0xe0 (Task EvenField VerticalBlank                )
426                  */
427                 data[5] = 0xA0E0A0E0;
428         }
429
430         CX18_DEBUG_INFO("Setup VBI h: %d lines %x bpl %d fr %d %x %x\n",
431                         data[0], data[1], data[2], data[3], data[4], data[5]);
432
433         cx18_api(cx, CX18_CPU_SET_RAW_VBI_PARAM, 6, data);
434 }
435
436 struct cx18_queue *cx18_stream_put_buf_fw(struct cx18_stream *s,
437                                           struct cx18_buffer *buf)
438 {
439         struct cx18 *cx = s->cx;
440         struct cx18_queue *q;
441
442         /* Don't give it to the firmware, if we're not running a capture */
443         if (s->handle == CX18_INVALID_TASK_HANDLE ||
444             !test_bit(CX18_F_S_STREAMING, &s->s_flags))
445                 return cx18_enqueue(s, buf, &s->q_free);
446
447         q = cx18_enqueue(s, buf, &s->q_busy);
448         if (q != &s->q_busy)
449                 return q; /* The firmware has the max buffers it can handle */
450
451         cx18_buf_sync_for_device(s, buf);
452         cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, s->handle,
453                   (void __iomem *) &cx->scb->cpu_mdl[buf->id] - cx->enc_mem,
454                   1, buf->id, s->buf_size);
455         return q;
456 }
457
458 void cx18_stream_load_fw_queue(struct cx18_stream *s)
459 {
460         struct cx18_queue *q;
461         struct cx18_buffer *buf;
462
463         if (atomic_read(&s->q_free.buffers) == 0 ||
464             atomic_read(&s->q_busy.buffers) >= CX18_MAX_FW_MDLS_PER_STREAM)
465                 return;
466
467         /* Move from q_free to q_busy notifying the firmware, until the limit */
468         do {
469                 buf = cx18_dequeue(s, &s->q_free);
470                 if (buf == NULL)
471                         break;
472                 q = cx18_stream_put_buf_fw(s, buf);
473         } while (atomic_read(&s->q_busy.buffers) < CX18_MAX_FW_MDLS_PER_STREAM
474                  && q == &s->q_busy);
475 }
476
477 int cx18_start_v4l2_encode_stream(struct cx18_stream *s)
478 {
479         u32 data[MAX_MB_ARGUMENTS];
480         struct cx18 *cx = s->cx;
481         struct cx18_buffer *buf;
482         int captype = 0;
483         struct cx18_api_func_private priv;
484
485         if (s->video_dev == NULL && s->dvb.enabled == 0)
486                 return -EINVAL;
487
488         CX18_DEBUG_INFO("Start encoder stream %s\n", s->name);
489
490         switch (s->type) {
491         case CX18_ENC_STREAM_TYPE_MPG:
492                 captype = CAPTURE_CHANNEL_TYPE_MPEG;
493                 cx->mpg_data_received = cx->vbi_data_inserted = 0;
494                 cx->dualwatch_jiffies = jiffies;
495                 cx->dualwatch_stereo_mode = cx->params.audio_properties & 0x300;
496                 cx->search_pack_header = 0;
497                 break;
498
499         case CX18_ENC_STREAM_TYPE_TS:
500                 captype = CAPTURE_CHANNEL_TYPE_TS;
501                 break;
502         case CX18_ENC_STREAM_TYPE_YUV:
503                 captype = CAPTURE_CHANNEL_TYPE_YUV;
504                 break;
505         case CX18_ENC_STREAM_TYPE_PCM:
506                 captype = CAPTURE_CHANNEL_TYPE_PCM;
507                 break;
508         case CX18_ENC_STREAM_TYPE_VBI:
509 #ifdef CX18_ENCODER_PARSES_SLICED
510                 captype = cx18_raw_vbi(cx) ?
511                      CAPTURE_CHANNEL_TYPE_VBI : CAPTURE_CHANNEL_TYPE_SLICED_VBI;
512 #else
513                 /*
514                  * Currently we set things up so that Sliced VBI from the
515                  * digitizer is handled as Raw VBI by the encoder
516                  */
517                 captype = CAPTURE_CHANNEL_TYPE_VBI;
518 #endif
519                 cx->vbi.frame = 0;
520                 cx->vbi.inserted_frame = 0;
521                 memset(cx->vbi.sliced_mpeg_size,
522                         0, sizeof(cx->vbi.sliced_mpeg_size));
523                 break;
524         default:
525                 return -EINVAL;
526         }
527
528         /* Clear Streamoff flags in case left from last capture */
529         clear_bit(CX18_F_S_STREAMOFF, &s->s_flags);
530
531         cx18_vapi_result(cx, data, CX18_CREATE_TASK, 1, CPU_CMD_MASK_CAPTURE);
532         s->handle = data[0];
533         cx18_vapi(cx, CX18_CPU_SET_CHANNEL_TYPE, 2, s->handle, captype);
534
535         /*
536          * For everything but CAPTURE_CHANNEL_TYPE_TS, play it safe and
537          * set up all the parameters, as it is not obvious which parameters the
538          * firmware shares across capture channel types and which it does not.
539          *
540          * Some of the cx18_vapi() calls below apply to only certain capture
541          * channel types.  We're hoping there's no harm in calling most of them
542          * anyway, as long as the values are all consistent.  Setting some
543          * shared parameters will have no effect once an analog capture channel
544          * has started streaming.
545          */
546         if (captype != CAPTURE_CHANNEL_TYPE_TS) {
547                 cx18_vapi(cx, CX18_CPU_SET_VER_CROP_LINE, 2, s->handle, 0);
548                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 3, 1);
549                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 8, 0);
550                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 4, 1);
551
552                 /*
553                  * Audio related reset according to
554                  * Documentation/video4linux/cx2341x/fw-encoder-api.txt
555                  */
556                 if (atomic_read(&cx->ana_capturing) == 0)
557                         cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2,
558                                   s->handle, 12);
559
560                 /*
561                  * Number of lines for Field 1 & Field 2 according to
562                  * Documentation/video4linux/cx2341x/fw-encoder-api.txt
563                  * Field 1 is 312 for 625 line systems in BT.656
564                  * Field 2 is 313 for 625 line systems in BT.656
565                  */
566                 cx18_vapi(cx, CX18_CPU_SET_CAPTURE_LINE_NO, 3,
567                           s->handle, 312, 313);
568
569                 if (cx->v4l2_cap & V4L2_CAP_VBI_CAPTURE)
570                         cx18_vbi_setup(s);
571
572                 /*
573                  * assign program index info.
574                  * Mask 7: select I/P/B, Num_req: 400 max
575                  * FIXME - currently we have this hardcoded as disabled
576                  */
577                 cx18_vapi_result(cx, data, CX18_CPU_SET_INDEXTABLE, 1, 0);
578
579                 /* Call out to the common CX2341x API setup for user controls */
580                 priv.cx = cx;
581                 priv.s = s;
582                 cx2341x_update(&priv, cx18_api_func, NULL, &cx->params);
583
584                 /*
585                  * When starting a capture and we're set for radio,
586                  * ensure the video is muted, despite the user control.
587                  */
588                 if (!cx->params.video_mute &&
589                     test_bit(CX18_F_I_RADIO_USER, &cx->i_flags))
590                         cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2, s->handle,
591                                   (cx->params.video_mute_yuv << 8) | 1);
592         }
593
594         if (atomic_read(&cx->tot_capturing) == 0) {
595                 clear_bit(CX18_F_I_EOS, &cx->i_flags);
596                 cx18_write_reg(cx, 7, CX18_DSP0_INTERRUPT_MASK);
597         }
598
599         cx18_vapi(cx, CX18_CPU_DE_SET_MDL_ACK, 3, s->handle,
600                 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][0] - cx->enc_mem,
601                 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][1] - cx->enc_mem);
602
603         /* Init all the cpu_mdls for this stream */
604         cx18_flush_queues(s);
605         mutex_lock(&s->qlock);
606         list_for_each_entry(buf, &s->q_free.list, list) {
607                 cx18_writel(cx, buf->dma_handle,
608                                         &cx->scb->cpu_mdl[buf->id].paddr);
609                 cx18_writel(cx, s->buf_size, &cx->scb->cpu_mdl[buf->id].length);
610         }
611         mutex_unlock(&s->qlock);
612         cx18_stream_load_fw_queue(s);
613
614         /* begin_capture */
615         if (cx18_vapi(cx, CX18_CPU_CAPTURE_START, 1, s->handle)) {
616                 CX18_DEBUG_WARN("Error starting capture!\n");
617                 /* Ensure we're really not capturing before releasing MDLs */
618                 if (s->type == CX18_ENC_STREAM_TYPE_MPG)
619                         cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, 1);
620                 else
621                         cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
622                 clear_bit(CX18_F_S_STREAMING, &s->s_flags);
623                 /* FIXME - CX18_F_S_STREAMOFF as well? */
624                 cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
625                 cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
626                 s->handle = CX18_INVALID_TASK_HANDLE;
627                 if (atomic_read(&cx->tot_capturing) == 0) {
628                         set_bit(CX18_F_I_EOS, &cx->i_flags);
629                         cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
630                 }
631                 return -EINVAL;
632         }
633
634         /* you're live! sit back and await interrupts :) */
635         if (captype != CAPTURE_CHANNEL_TYPE_TS)
636                 atomic_inc(&cx->ana_capturing);
637         atomic_inc(&cx->tot_capturing);
638         return 0;
639 }
640
641 void cx18_stop_all_captures(struct cx18 *cx)
642 {
643         int i;
644
645         for (i = CX18_MAX_STREAMS - 1; i >= 0; i--) {
646                 struct cx18_stream *s = &cx->streams[i];
647
648                 if (s->video_dev == NULL && s->dvb.enabled == 0)
649                         continue;
650                 if (test_bit(CX18_F_S_STREAMING, &s->s_flags))
651                         cx18_stop_v4l2_encode_stream(s, 0);
652         }
653 }
654
655 int cx18_stop_v4l2_encode_stream(struct cx18_stream *s, int gop_end)
656 {
657         struct cx18 *cx = s->cx;
658         unsigned long then;
659
660         if (s->video_dev == NULL && s->dvb.enabled == 0)
661                 return -EINVAL;
662
663         /* This function assumes that you are allowed to stop the capture
664            and that we are actually capturing */
665
666         CX18_DEBUG_INFO("Stop Capture\n");
667
668         if (atomic_read(&cx->tot_capturing) == 0)
669                 return 0;
670
671         if (s->type == CX18_ENC_STREAM_TYPE_MPG)
672                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, !gop_end);
673         else
674                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
675
676         then = jiffies;
677
678         if (s->type == CX18_ENC_STREAM_TYPE_MPG && gop_end) {
679                 CX18_INFO("ignoring gop_end: not (yet?) supported by the firmware\n");
680         }
681
682         if (s->type != CX18_ENC_STREAM_TYPE_TS)
683                 atomic_dec(&cx->ana_capturing);
684         atomic_dec(&cx->tot_capturing);
685
686         /* Clear capture and no-read bits */
687         clear_bit(CX18_F_S_STREAMING, &s->s_flags);
688
689         /* Tell the CX23418 it can't use our buffers anymore */
690         cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
691
692         cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
693         s->handle = CX18_INVALID_TASK_HANDLE;
694
695         if (atomic_read(&cx->tot_capturing) > 0)
696                 return 0;
697
698         cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
699         wake_up(&s->waitq);
700
701         return 0;
702 }
703
704 u32 cx18_find_handle(struct cx18 *cx)
705 {
706         int i;
707
708         /* find first available handle to be used for global settings */
709         for (i = 0; i < CX18_MAX_STREAMS; i++) {
710                 struct cx18_stream *s = &cx->streams[i];
711
712                 if (s->video_dev && (s->handle != CX18_INVALID_TASK_HANDLE))
713                         return s->handle;
714         }
715         return CX18_INVALID_TASK_HANDLE;
716 }
717
718 struct cx18_stream *cx18_handle_to_stream(struct cx18 *cx, u32 handle)
719 {
720         int i;
721         struct cx18_stream *s;
722
723         if (handle == CX18_INVALID_TASK_HANDLE)
724                 return NULL;
725
726         for (i = 0; i < CX18_MAX_STREAMS; i++) {
727                 s = &cx->streams[i];
728                 if (s->handle != handle)
729                         continue;
730                 if (s->video_dev || s->dvb.enabled)
731                         return s;
732         }
733         return NULL;
734 }