2 * cx18 init/start/stop/exit stream functions
4 * Derived from ivtv-streams.c
6 * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
7 * Copyright (C) 2008 Andy Walls <awalls@radix.net>
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.
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.
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
25 #include "cx18-driver.h"
27 #include "cx18-fileops.h"
28 #include "cx18-mailbox.h"
30 #include "cx18-queue.h"
31 #include "cx18-ioctl.h"
32 #include "cx18-streams.h"
33 #include "cx18-cards.h"
37 #define CX18_DSP0_INTERRUPT_MASK 0xd0004C
39 static struct v4l2_file_operations cx18_v4l2_enc_fops = {
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,
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
61 enum v4l2_buf_type buf_type;
62 } cx18_stream_info[] = {
63 { /* CX18_ENC_STREAM_TYPE_MPG */
66 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
68 { /* CX18_ENC_STREAM_TYPE_TS */
71 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
73 { /* CX18_ENC_STREAM_TYPE_YUV */
75 VFL_TYPE_GRABBER, CX18_V4L2_ENC_YUV_OFFSET,
76 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
78 { /* CX18_ENC_STREAM_TYPE_VBI */
81 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VBI_CAPTURE,
83 { /* CX18_ENC_STREAM_TYPE_PCM */
85 VFL_TYPE_GRABBER, CX18_V4L2_ENC_PCM_OFFSET,
86 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_PRIVATE,
88 { /* CX18_ENC_STREAM_TYPE_IDX */
91 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
93 { /* CX18_ENC_STREAM_TYPE_RAD */
96 PCI_DMA_NONE, V4L2_BUF_TYPE_PRIVATE,
100 static void cx18_stream_init(struct cx18 *cx, int type)
102 struct cx18_stream *s = &cx->streams[type];
103 struct video_device *video_dev = s->video_dev;
105 /* we need to keep video_dev, so restore it afterwards */
106 memset(s, 0, sizeof(*s));
107 s->video_dev = video_dev;
109 /* initialize cx18_stream fields */
112 s->name = cx18_stream_info[type].name;
113 s->handle = CX18_INVALID_TASK_HANDLE;
115 s->dma = cx18_stream_info[type].dma;
116 s->buffers = cx->stream_buffers[type];
117 s->buf_size = cx->stream_buf_size[type];
119 mutex_init(&s->qlock);
120 init_waitqueue_head(&s->waitq);
122 cx18_queue_init(&s->q_free);
123 cx18_queue_init(&s->q_busy);
124 cx18_queue_init(&s->q_full);
127 static int cx18_prep_dev(struct cx18 *cx, int type)
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;
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
140 s->name = cx18_stream_info[type].name;
142 /* Check whether the radio is supported */
143 if (type == CX18_ENC_STREAM_TYPE_RAD && !(cap & V4L2_CAP_RADIO))
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)))
151 /* User explicitly selected 0 buffers for these streams, so don't
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);
159 cx18_stream_init(cx, type);
161 if (num_offset == -1)
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",
172 snprintf(s->video_dev->name, sizeof(s->video_dev->name), "%s %s",
173 cx->v4l2_dev.name, s->name);
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);
184 /* Initialize v4l2 variables and register v4l2 devices */
185 int cx18_streams_setup(struct cx18 *cx)
189 /* Setup V4L2 Devices */
190 for (type = 0; type < CX18_MAX_STREAMS; type++) {
192 ret = cx18_prep_dev(cx, type);
196 /* Allocate Stream */
197 ret = cx18_stream_alloc(&cx->streams[type]);
201 if (type == CX18_MAX_STREAMS)
204 /* One or more streams could not be initialized. Clean 'em all up. */
205 cx18_streams_cleanup(cx, 0);
209 static int cx18_reg_dev(struct cx18 *cx, int type)
211 struct cx18_stream *s = &cx->streams[type];
212 int vfl_type = cx18_stream_info[type].vfl_type;
215 /* TODO: Shouldn't this be a VFL_TYPE_TRANSPORT or something?
216 * We need a VFL_TYPE_TS defined.
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)
222 ret = cx18_dvb_register(s);
224 CX18_ERR("DVB failed to register\n");
229 if (s->video_dev == NULL)
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];
237 if (s_mpg->video_dev)
238 num = s_mpg->video_dev->num
239 + cx18_stream_info[type].num_offset;
241 video_set_drvdata(s->video_dev, s);
243 /* Register device. First try the desired minor, then any free one. */
244 ret = video_register_device(s->video_dev, vfl_type, num);
246 CX18_ERR("Couldn't register v4l2 device for %s kernel number %d\n",
248 video_device_release(s->video_dev);
252 num = s->video_dev->num;
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);
262 CX18_INFO("Registered device radio%d for %s\n",
267 if (cx->stream_buffers[type])
268 CX18_INFO("Registered device vbi%d for %s "
270 num, s->name, cx->stream_buffers[type],
271 cx->stream_buf_size[type]);
273 CX18_INFO("Registered device vbi%d for %s\n",
281 /* Register v4l2 devices */
282 int cx18_streams_register(struct cx18 *cx)
288 /* Register V4L2 devices */
289 for (type = 0; type < CX18_MAX_STREAMS; type++) {
290 err = cx18_reg_dev(cx, type);
298 /* One or more streams could not be initialized. Clean 'em all up. */
299 cx18_streams_cleanup(cx, 1);
303 /* Unregister v4l2 devices */
304 void cx18_streams_cleanup(struct cx18 *cx, int unregister)
306 struct video_device *vdev;
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;
316 vdev = cx->streams[type].video_dev;
318 cx->streams[type].video_dev = NULL;
322 cx18_stream_free(&cx->streams[type]);
324 /* Unregister or release device */
326 video_unregister_device(vdev);
328 video_device_release(vdev);
332 static void cx18_vbi_setup(struct cx18_stream *s)
334 struct cx18 *cx = s->cx;
335 int raw = cx18_raw_vbi(cx);
336 u32 data[CX2341X_MBOX_MAX_DATA];
341 cx->vbi.start[0] = 10;
342 cx->vbi.start[1] = 273;
343 } else { /* PAL/SECAM */
345 cx->vbi.start[0] = 6;
346 cx->vbi.start[1] = 318;
349 /* setup VBI registers */
350 v4l2_subdev_call(cx->sd_av, video, s_fmt, &cx->vbi.in);
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
361 lines = cx->vbi.count * 2;
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.
370 * FIXME - revisit for 625/50 systems
372 lines = cx->is_60hz ? (21 - 4 + 1) * 2 : 38;
376 /* Lines per field */
377 data[1] = (lines / 2) | ((lines / 2) << 16);
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) */
386 * Set the SAV/EAV RP codes to look for as start/stop points
387 * when in VIP-1.1 mode
391 * Start codes for beginning of "active" line in vertical blank
392 * 0x20 ( VerticalBlank )
393 * 0x60 ( EvenField VerticalBlank )
395 data[4] = 0x20602060;
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)
403 data[5] = 0x307090d0;
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)
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
413 * 0x90 (Task HorizontalBlank)
414 * 0xd0 (Task EvenField HorizontalBlank)
416 * We have set the digitzer such that we don't have to worry
417 * about these problem codes.
419 data[4] = 0xB0F0B0F0;
421 * Start codes for beginning of active line in vertical blank
422 * 0xa0 (Task VerticalBlank )
423 * 0xe0 (Task EvenField VerticalBlank )
425 data[5] = 0xA0E0A0E0;
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]);
431 cx18_api(cx, CX18_CPU_SET_RAW_VBI_PARAM, 6, data);
435 struct cx18_queue *_cx18_stream_put_buf_fw(struct cx18_stream *s,
436 struct cx18_buffer *buf)
438 struct cx18 *cx = s->cx;
439 struct cx18_queue *q;
441 /* Don't give it to the firmware, if we're not running a capture */
442 if (s->handle == CX18_INVALID_TASK_HANDLE ||
443 test_bit(CX18_F_S_STOPPING, &s->s_flags) ||
444 !test_bit(CX18_F_S_STREAMING, &s->s_flags))
445 return cx18_enqueue(s, buf, &s->q_free);
447 q = cx18_enqueue(s, buf, &s->q_busy);
449 return q; /* The firmware has the max buffers it can handle */
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);
459 void _cx18_stream_load_fw_queue(struct cx18_stream *s)
461 struct cx18_queue *q;
462 struct cx18_buffer *buf;
464 if (atomic_read(&s->q_free.buffers) == 0 ||
465 atomic_read(&s->q_busy.buffers) >= CX18_MAX_FW_MDLS_PER_STREAM)
468 /* Move from q_free to q_busy notifying the firmware, until the limit */
470 buf = cx18_dequeue(s, &s->q_free);
473 q = _cx18_stream_put_buf_fw(s, buf);
474 } while (atomic_read(&s->q_busy.buffers) < CX18_MAX_FW_MDLS_PER_STREAM
479 void free_out_work_order(struct cx18_out_work_order *order)
481 atomic_set(&order->pending, 0);
484 void cx18_out_work_handler(struct work_struct *work)
486 struct cx18_out_work_order *order =
487 container_of(work, struct cx18_out_work_order, work);
488 struct cx18_stream *s = order->s;
489 struct cx18_buffer *buf = order->buf;
491 free_out_work_order(order);
494 _cx18_stream_load_fw_queue(s);
496 _cx18_stream_put_buf_fw(s, buf);
500 struct cx18_out_work_order *alloc_out_work_order(struct cx18 *cx)
503 struct cx18_out_work_order *order = NULL;
505 for (i = 0; i < CX18_MAX_OUT_WORK_ORDERS; i++) {
507 * We need "pending" to be atomic to inspect & set its contents
508 * 1. "pending" is only set to 1 here, but needs multiple access
510 * 2. work handler threads only clear "pending" and only
511 * on one, particular work order at a time, per handler thread.
513 if (atomic_add_unless(&cx->out_work_order[i].pending, 1, 1)) {
514 order = &cx->out_work_order[i];
521 struct cx18_queue *cx18_stream_put_buf_fw(struct cx18_stream *s,
522 struct cx18_buffer *buf)
524 struct cx18 *cx = s->cx;
525 struct cx18_out_work_order *order;
527 order = alloc_out_work_order(cx);
529 CX18_DEBUG_WARN("No blank, outgoing-mailbox, deferred-work, "
530 "order forms available; sending buffer %u back "
531 "to the firmware immediately for stream %s\n",
533 return _cx18_stream_put_buf_fw(s, buf);
537 queue_work(cx->out_work_queue, &order->work);
541 void cx18_stream_load_fw_queue(struct cx18_stream *s)
543 struct cx18 *cx = s->cx;
544 struct cx18_out_work_order *order;
546 order = alloc_out_work_order(cx);
548 CX18_DEBUG_WARN("No blank, outgoing-mailbox, deferred-work, "
549 "order forms available; filling the firmware "
550 "buffer queue immediately for stream %s\n",
552 _cx18_stream_load_fw_queue(s);
556 order->buf = NULL; /* Indicates to load the fw queue */
557 queue_work(cx->out_work_queue, &order->work);
560 int cx18_start_v4l2_encode_stream(struct cx18_stream *s)
562 u32 data[MAX_MB_ARGUMENTS];
563 struct cx18 *cx = s->cx;
564 struct cx18_buffer *buf;
566 struct cx18_api_func_private priv;
568 if (s->video_dev == NULL && s->dvb.enabled == 0)
571 CX18_DEBUG_INFO("Start encoder stream %s\n", s->name);
574 case CX18_ENC_STREAM_TYPE_MPG:
575 captype = CAPTURE_CHANNEL_TYPE_MPEG;
576 cx->mpg_data_received = cx->vbi_data_inserted = 0;
577 cx->dualwatch_jiffies = jiffies;
578 cx->dualwatch_stereo_mode = cx->params.audio_properties & 0x300;
579 cx->search_pack_header = 0;
582 case CX18_ENC_STREAM_TYPE_TS:
583 captype = CAPTURE_CHANNEL_TYPE_TS;
585 case CX18_ENC_STREAM_TYPE_YUV:
586 captype = CAPTURE_CHANNEL_TYPE_YUV;
588 case CX18_ENC_STREAM_TYPE_PCM:
589 captype = CAPTURE_CHANNEL_TYPE_PCM;
591 case CX18_ENC_STREAM_TYPE_VBI:
592 #ifdef CX18_ENCODER_PARSES_SLICED
593 captype = cx18_raw_vbi(cx) ?
594 CAPTURE_CHANNEL_TYPE_VBI : CAPTURE_CHANNEL_TYPE_SLICED_VBI;
597 * Currently we set things up so that Sliced VBI from the
598 * digitizer is handled as Raw VBI by the encoder
600 captype = CAPTURE_CHANNEL_TYPE_VBI;
603 cx->vbi.inserted_frame = 0;
604 memset(cx->vbi.sliced_mpeg_size,
605 0, sizeof(cx->vbi.sliced_mpeg_size));
611 /* Clear Streamoff flags in case left from last capture */
612 clear_bit(CX18_F_S_STREAMOFF, &s->s_flags);
614 cx18_vapi_result(cx, data, CX18_CREATE_TASK, 1, CPU_CMD_MASK_CAPTURE);
616 cx18_vapi(cx, CX18_CPU_SET_CHANNEL_TYPE, 2, s->handle, captype);
619 * For everything but CAPTURE_CHANNEL_TYPE_TS, play it safe and
620 * set up all the parameters, as it is not obvious which parameters the
621 * firmware shares across capture channel types and which it does not.
623 * Some of the cx18_vapi() calls below apply to only certain capture
624 * channel types. We're hoping there's no harm in calling most of them
625 * anyway, as long as the values are all consistent. Setting some
626 * shared parameters will have no effect once an analog capture channel
627 * has started streaming.
629 if (captype != CAPTURE_CHANNEL_TYPE_TS) {
630 cx18_vapi(cx, CX18_CPU_SET_VER_CROP_LINE, 2, s->handle, 0);
631 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 3, 1);
632 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 8, 0);
633 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 4, 1);
636 * Audio related reset according to
637 * Documentation/video4linux/cx2341x/fw-encoder-api.txt
639 if (atomic_read(&cx->ana_capturing) == 0)
640 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2,
644 * Number of lines for Field 1 & Field 2 according to
645 * Documentation/video4linux/cx2341x/fw-encoder-api.txt
646 * Field 1 is 312 for 625 line systems in BT.656
647 * Field 2 is 313 for 625 line systems in BT.656
649 cx18_vapi(cx, CX18_CPU_SET_CAPTURE_LINE_NO, 3,
650 s->handle, 312, 313);
652 if (cx->v4l2_cap & V4L2_CAP_VBI_CAPTURE)
656 * assign program index info.
657 * Mask 7: select I/P/B, Num_req: 400 max
658 * FIXME - currently we have this hardcoded as disabled
660 cx18_vapi_result(cx, data, CX18_CPU_SET_INDEXTABLE, 1, 0);
662 /* Call out to the common CX2341x API setup for user controls */
665 cx2341x_update(&priv, cx18_api_func, NULL, &cx->params);
668 * When starting a capture and we're set for radio,
669 * ensure the video is muted, despite the user control.
671 if (!cx->params.video_mute &&
672 test_bit(CX18_F_I_RADIO_USER, &cx->i_flags))
673 cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2, s->handle,
674 (cx->params.video_mute_yuv << 8) | 1);
677 if (atomic_read(&cx->tot_capturing) == 0) {
678 clear_bit(CX18_F_I_EOS, &cx->i_flags);
679 cx18_write_reg(cx, 7, CX18_DSP0_INTERRUPT_MASK);
682 cx18_vapi(cx, CX18_CPU_DE_SET_MDL_ACK, 3, s->handle,
683 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][0] - cx->enc_mem,
684 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][1] - cx->enc_mem);
686 /* Init all the cpu_mdls for this stream */
687 cx18_flush_queues(s);
688 mutex_lock(&s->qlock);
689 list_for_each_entry(buf, &s->q_free.list, list) {
690 cx18_writel(cx, buf->dma_handle,
691 &cx->scb->cpu_mdl[buf->id].paddr);
692 cx18_writel(cx, s->buf_size, &cx->scb->cpu_mdl[buf->id].length);
694 mutex_unlock(&s->qlock);
695 _cx18_stream_load_fw_queue(s);
698 if (cx18_vapi(cx, CX18_CPU_CAPTURE_START, 1, s->handle)) {
699 CX18_DEBUG_WARN("Error starting capture!\n");
700 /* Ensure we're really not capturing before releasing MDLs */
701 set_bit(CX18_F_S_STOPPING, &s->s_flags);
702 if (s->type == CX18_ENC_STREAM_TYPE_MPG)
703 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, 1);
705 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
706 clear_bit(CX18_F_S_STREAMING, &s->s_flags);
707 /* FIXME - CX18_F_S_STREAMOFF as well? */
708 cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
709 cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
710 s->handle = CX18_INVALID_TASK_HANDLE;
711 clear_bit(CX18_F_S_STOPPING, &s->s_flags);
712 if (atomic_read(&cx->tot_capturing) == 0) {
713 set_bit(CX18_F_I_EOS, &cx->i_flags);
714 cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
719 /* you're live! sit back and await interrupts :) */
720 if (captype != CAPTURE_CHANNEL_TYPE_TS)
721 atomic_inc(&cx->ana_capturing);
722 atomic_inc(&cx->tot_capturing);
726 void cx18_stop_all_captures(struct cx18 *cx)
730 for (i = CX18_MAX_STREAMS - 1; i >= 0; i--) {
731 struct cx18_stream *s = &cx->streams[i];
733 if (s->video_dev == NULL && s->dvb.enabled == 0)
735 if (test_bit(CX18_F_S_STREAMING, &s->s_flags))
736 cx18_stop_v4l2_encode_stream(s, 0);
740 int cx18_stop_v4l2_encode_stream(struct cx18_stream *s, int gop_end)
742 struct cx18 *cx = s->cx;
745 if (s->video_dev == NULL && s->dvb.enabled == 0)
748 /* This function assumes that you are allowed to stop the capture
749 and that we are actually capturing */
751 CX18_DEBUG_INFO("Stop Capture\n");
753 if (atomic_read(&cx->tot_capturing) == 0)
756 set_bit(CX18_F_S_STOPPING, &s->s_flags);
757 if (s->type == CX18_ENC_STREAM_TYPE_MPG)
758 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, !gop_end);
760 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
764 if (s->type == CX18_ENC_STREAM_TYPE_MPG && gop_end) {
765 CX18_INFO("ignoring gop_end: not (yet?) supported by the firmware\n");
768 if (s->type != CX18_ENC_STREAM_TYPE_TS)
769 atomic_dec(&cx->ana_capturing);
770 atomic_dec(&cx->tot_capturing);
772 /* Clear capture and no-read bits */
773 clear_bit(CX18_F_S_STREAMING, &s->s_flags);
775 /* Tell the CX23418 it can't use our buffers anymore */
776 cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
778 cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
779 s->handle = CX18_INVALID_TASK_HANDLE;
780 clear_bit(CX18_F_S_STOPPING, &s->s_flags);
782 if (atomic_read(&cx->tot_capturing) > 0)
785 cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
791 u32 cx18_find_handle(struct cx18 *cx)
795 /* find first available handle to be used for global settings */
796 for (i = 0; i < CX18_MAX_STREAMS; i++) {
797 struct cx18_stream *s = &cx->streams[i];
799 if (s->video_dev && (s->handle != CX18_INVALID_TASK_HANDLE))
802 return CX18_INVALID_TASK_HANDLE;
805 struct cx18_stream *cx18_handle_to_stream(struct cx18 *cx, u32 handle)
808 struct cx18_stream *s;
810 if (handle == CX18_INVALID_TASK_HANDLE)
813 for (i = 0; i < CX18_MAX_STREAMS; i++) {
815 if (s->handle != handle)
817 if (s->video_dev || s->dvb.enabled)