Full support for Ginger Console
[linux-ginger.git] / drivers / media / video / cx18 / cx18-streams.c
blob7df513a2dba847393dc22da10be89efc0f1b3d6d
1 /*
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
22 * 02111-1307 USA
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"
37 #define CX18_DSP0_INTERRUPT_MASK 0xd0004C
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,
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
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,
68 { /* CX18_ENC_STREAM_TYPE_TS */
69 "TS",
70 VFL_TYPE_GRABBER, -1,
71 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
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,
78 { /* CX18_ENC_STREAM_TYPE_VBI */
79 "encoder VBI",
80 VFL_TYPE_VBI, 0,
81 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VBI_CAPTURE,
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,
88 { /* CX18_ENC_STREAM_TYPE_IDX */
89 "encoder IDX",
90 VFL_TYPE_GRABBER, -1,
91 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
93 { /* CX18_ENC_STREAM_TYPE_RAD */
94 "encoder radio",
95 VFL_TYPE_RADIO, 0,
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 */
110 s->cx = cx;
111 s->type = type;
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 init_waitqueue_head(&s->waitq);
120 s->id = -1;
121 spin_lock_init(&s->q_free.lock);
122 cx18_queue_init(&s->q_free);
123 spin_lock_init(&s->q_busy.lock);
124 cx18_queue_init(&s->q_busy);
125 spin_lock_init(&s->q_full.lock);
126 cx18_queue_init(&s->q_full);
128 INIT_WORK(&s->out_work_order, cx18_out_work_handler);
131 static int cx18_prep_dev(struct cx18 *cx, int type)
133 struct cx18_stream *s = &cx->streams[type];
134 u32 cap = cx->v4l2_cap;
135 int num_offset = cx18_stream_info[type].num_offset;
136 int num = cx->instance + cx18_first_minor + num_offset;
138 /* These four fields are always initialized. If video_dev == NULL, then
139 this stream is not in use. In that case no other fields but these
140 four can be used. */
141 s->video_dev = NULL;
142 s->cx = cx;
143 s->type = type;
144 s->name = cx18_stream_info[type].name;
146 /* Check whether the radio is supported */
147 if (type == CX18_ENC_STREAM_TYPE_RAD && !(cap & V4L2_CAP_RADIO))
148 return 0;
150 /* Check whether VBI is supported */
151 if (type == CX18_ENC_STREAM_TYPE_VBI &&
152 !(cap & (V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_CAPTURE)))
153 return 0;
155 /* User explicitly selected 0 buffers for these streams, so don't
156 create them. */
157 if (cx18_stream_info[type].dma != PCI_DMA_NONE &&
158 cx->stream_buffers[type] == 0) {
159 CX18_INFO("Disabled %s device\n", cx18_stream_info[type].name);
160 return 0;
163 cx18_stream_init(cx, type);
165 if (num_offset == -1)
166 return 0;
168 /* allocate and initialize the v4l2 video device structure */
169 s->video_dev = video_device_alloc();
170 if (s->video_dev == NULL) {
171 CX18_ERR("Couldn't allocate v4l2 video_device for %s\n",
172 s->name);
173 return -ENOMEM;
176 snprintf(s->video_dev->name, sizeof(s->video_dev->name), "%s %s",
177 cx->v4l2_dev.name, s->name);
179 s->video_dev->num = num;
180 s->video_dev->v4l2_dev = &cx->v4l2_dev;
181 s->video_dev->fops = &cx18_v4l2_enc_fops;
182 s->video_dev->release = video_device_release;
183 s->video_dev->tvnorms = V4L2_STD_ALL;
184 cx18_set_funcs(s->video_dev);
185 return 0;
188 /* Initialize v4l2 variables and register v4l2 devices */
189 int cx18_streams_setup(struct cx18 *cx)
191 int type, ret;
193 /* Setup V4L2 Devices */
194 for (type = 0; type < CX18_MAX_STREAMS; type++) {
195 /* Prepare device */
196 ret = cx18_prep_dev(cx, type);
197 if (ret < 0)
198 break;
200 /* Allocate Stream */
201 ret = cx18_stream_alloc(&cx->streams[type]);
202 if (ret < 0)
203 break;
205 if (type == CX18_MAX_STREAMS)
206 return 0;
208 /* One or more streams could not be initialized. Clean 'em all up. */
209 cx18_streams_cleanup(cx, 0);
210 return ret;
213 static int cx18_reg_dev(struct cx18 *cx, int type)
215 struct cx18_stream *s = &cx->streams[type];
216 int vfl_type = cx18_stream_info[type].vfl_type;
217 int num, ret;
219 /* TODO: Shouldn't this be a VFL_TYPE_TRANSPORT or something?
220 * We need a VFL_TYPE_TS defined.
222 if (strcmp("TS", s->name) == 0) {
223 /* just return if no DVB is supported */
224 if ((cx->card->hw_all & CX18_HW_DVB) == 0)
225 return 0;
226 ret = cx18_dvb_register(s);
227 if (ret < 0) {
228 CX18_ERR("DVB failed to register\n");
229 return ret;
233 if (s->video_dev == NULL)
234 return 0;
236 num = s->video_dev->num;
237 /* card number + user defined offset + device offset */
238 if (type != CX18_ENC_STREAM_TYPE_MPG) {
239 struct cx18_stream *s_mpg = &cx->streams[CX18_ENC_STREAM_TYPE_MPG];
241 if (s_mpg->video_dev)
242 num = s_mpg->video_dev->num
243 + cx18_stream_info[type].num_offset;
245 video_set_drvdata(s->video_dev, s);
247 /* Register device. First try the desired minor, then any free one. */
248 ret = video_register_device_no_warn(s->video_dev, vfl_type, num);
249 if (ret < 0) {
250 CX18_ERR("Couldn't register v4l2 device for %s (device node number %d)\n",
251 s->name, num);
252 video_device_release(s->video_dev);
253 s->video_dev = NULL;
254 return ret;
256 num = s->video_dev->num;
258 switch (vfl_type) {
259 case VFL_TYPE_GRABBER:
260 CX18_INFO("Registered device video%d for %s (%d x %d kB)\n",
261 num, s->name, cx->stream_buffers[type],
262 cx->stream_buf_size[type]/1024);
263 break;
265 case VFL_TYPE_RADIO:
266 CX18_INFO("Registered device radio%d for %s\n",
267 num, s->name);
268 break;
270 case VFL_TYPE_VBI:
271 if (cx->stream_buffers[type])
272 CX18_INFO("Registered device vbi%d for %s "
273 "(%d x %d bytes)\n",
274 num, s->name, cx->stream_buffers[type],
275 cx->stream_buf_size[type]);
276 else
277 CX18_INFO("Registered device vbi%d for %s\n",
278 num, s->name);
279 break;
282 return 0;
285 /* Register v4l2 devices */
286 int cx18_streams_register(struct cx18 *cx)
288 int type;
289 int err;
290 int ret = 0;
292 /* Register V4L2 devices */
293 for (type = 0; type < CX18_MAX_STREAMS; type++) {
294 err = cx18_reg_dev(cx, type);
295 if (err && ret == 0)
296 ret = err;
299 if (ret == 0)
300 return 0;
302 /* One or more streams could not be initialized. Clean 'em all up. */
303 cx18_streams_cleanup(cx, 1);
304 return ret;
307 /* Unregister v4l2 devices */
308 void cx18_streams_cleanup(struct cx18 *cx, int unregister)
310 struct video_device *vdev;
311 int type;
313 /* Teardown all streams */
314 for (type = 0; type < CX18_MAX_STREAMS; type++) {
315 if (cx->streams[type].dvb.enabled) {
316 cx18_dvb_unregister(&cx->streams[type]);
317 cx->streams[type].dvb.enabled = false;
320 vdev = cx->streams[type].video_dev;
322 cx->streams[type].video_dev = NULL;
323 if (vdev == NULL)
324 continue;
326 cx18_stream_free(&cx->streams[type]);
328 /* Unregister or release device */
329 if (unregister)
330 video_unregister_device(vdev);
331 else
332 video_device_release(vdev);
336 static void cx18_vbi_setup(struct cx18_stream *s)
338 struct cx18 *cx = s->cx;
339 int raw = cx18_raw_vbi(cx);
340 u32 data[CX2341X_MBOX_MAX_DATA];
341 int lines;
343 if (cx->is_60hz) {
344 cx->vbi.count = 12;
345 cx->vbi.start[0] = 10;
346 cx->vbi.start[1] = 273;
347 } else { /* PAL/SECAM */
348 cx->vbi.count = 18;
349 cx->vbi.start[0] = 6;
350 cx->vbi.start[1] = 318;
353 /* setup VBI registers */
354 v4l2_subdev_call(cx->sd_av, video, s_fmt, &cx->vbi.in);
357 * Send the CX18_CPU_SET_RAW_VBI_PARAM API command to setup Encoder Raw
358 * VBI when the first analog capture channel starts, as once it starts
359 * (e.g. MPEG), we can't effect any change in the Encoder Raw VBI setup
360 * (i.e. for the VBI capture channels). We also send it for each
361 * analog capture channel anyway just to make sure we get the proper
362 * behavior
364 if (raw) {
365 lines = cx->vbi.count * 2;
366 } else {
368 * For 525/60 systems, according to the VIP 2 & BT.656 std:
369 * The EAV RP code's Field bit toggles on line 4, a few lines
370 * after the Vertcal Blank bit has already toggled.
371 * Tell the encoder to capture 21-4+1=18 lines per field,
372 * since we want lines 10 through 21.
374 * For 625/50 systems, according to the VIP 2 & BT.656 std:
375 * The EAV RP code's Field bit toggles on line 1, a few lines
376 * after the Vertcal Blank bit has already toggled.
377 * (We've actually set the digitizer so that the Field bit
378 * toggles on line 2.) Tell the encoder to capture 23-2+1=22
379 * lines per field, since we want lines 6 through 23.
381 lines = cx->is_60hz ? (21 - 4 + 1) * 2 : (23 - 2 + 1) * 2;
384 data[0] = s->handle;
385 /* Lines per field */
386 data[1] = (lines / 2) | ((lines / 2) << 16);
387 /* bytes per line */
388 data[2] = (raw ? vbi_active_samples
389 : (cx->is_60hz ? vbi_hblank_samples_60Hz
390 : vbi_hblank_samples_50Hz));
391 /* Every X number of frames a VBI interrupt arrives
392 (frames as in 25 or 30 fps) */
393 data[3] = 1;
395 * Set the SAV/EAV RP codes to look for as start/stop points
396 * when in VIP-1.1 mode
398 if (raw) {
400 * Start codes for beginning of "active" line in vertical blank
401 * 0x20 ( VerticalBlank )
402 * 0x60 ( EvenField VerticalBlank )
404 data[4] = 0x20602060;
406 * End codes for end of "active" raw lines and regular lines
407 * 0x30 ( VerticalBlank HorizontalBlank)
408 * 0x70 ( EvenField VerticalBlank HorizontalBlank)
409 * 0x90 (Task HorizontalBlank)
410 * 0xd0 (Task EvenField HorizontalBlank)
412 data[5] = 0x307090d0;
413 } else {
415 * End codes for active video, we want data in the hblank region
416 * 0xb0 (Task 0 VerticalBlank HorizontalBlank)
417 * 0xf0 (Task EvenField VerticalBlank HorizontalBlank)
419 * Since the V bit is only allowed to toggle in the EAV RP code,
420 * just before the first active region line, these two
421 * are problematic:
422 * 0x90 (Task HorizontalBlank)
423 * 0xd0 (Task EvenField HorizontalBlank)
425 * We have set the digitzer such that we don't have to worry
426 * about these problem codes.
428 data[4] = 0xB0F0B0F0;
430 * Start codes for beginning of active line in vertical blank
431 * 0xa0 (Task VerticalBlank )
432 * 0xe0 (Task EvenField VerticalBlank )
434 data[5] = 0xA0E0A0E0;
437 CX18_DEBUG_INFO("Setup VBI h: %d lines %x bpl %d fr %d %x %x\n",
438 data[0], data[1], data[2], data[3], data[4], data[5]);
440 cx18_api(cx, CX18_CPU_SET_RAW_VBI_PARAM, 6, data);
443 static
444 struct cx18_queue *_cx18_stream_put_buf_fw(struct cx18_stream *s,
445 struct cx18_buffer *buf)
447 struct cx18 *cx = s->cx;
448 struct cx18_queue *q;
450 /* Don't give it to the firmware, if we're not running a capture */
451 if (s->handle == CX18_INVALID_TASK_HANDLE ||
452 test_bit(CX18_F_S_STOPPING, &s->s_flags) ||
453 !test_bit(CX18_F_S_STREAMING, &s->s_flags))
454 return cx18_enqueue(s, buf, &s->q_free);
456 q = cx18_enqueue(s, buf, &s->q_busy);
457 if (q != &s->q_busy)
458 return q; /* The firmware has the max buffers it can handle */
460 cx18_buf_sync_for_device(s, buf);
461 cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, s->handle,
462 (void __iomem *) &cx->scb->cpu_mdl[buf->id] - cx->enc_mem,
463 1, buf->id, s->buf_size);
464 return q;
467 static
468 void _cx18_stream_load_fw_queue(struct cx18_stream *s)
470 struct cx18_queue *q;
471 struct cx18_buffer *buf;
473 if (atomic_read(&s->q_free.buffers) == 0 ||
474 atomic_read(&s->q_busy.buffers) >= CX18_MAX_FW_MDLS_PER_STREAM)
475 return;
477 /* Move from q_free to q_busy notifying the firmware, until the limit */
478 do {
479 buf = cx18_dequeue(s, &s->q_free);
480 if (buf == NULL)
481 break;
482 q = _cx18_stream_put_buf_fw(s, buf);
483 } while (atomic_read(&s->q_busy.buffers) < CX18_MAX_FW_MDLS_PER_STREAM
484 && q == &s->q_busy);
487 void cx18_out_work_handler(struct work_struct *work)
489 struct cx18_stream *s =
490 container_of(work, struct cx18_stream, out_work_order);
492 _cx18_stream_load_fw_queue(s);
495 int cx18_start_v4l2_encode_stream(struct cx18_stream *s)
497 u32 data[MAX_MB_ARGUMENTS];
498 struct cx18 *cx = s->cx;
499 struct cx18_buffer *buf;
500 int captype = 0;
501 struct cx18_api_func_private priv;
503 if (s->video_dev == NULL && s->dvb.enabled == 0)
504 return -EINVAL;
506 CX18_DEBUG_INFO("Start encoder stream %s\n", s->name);
508 switch (s->type) {
509 case CX18_ENC_STREAM_TYPE_MPG:
510 captype = CAPTURE_CHANNEL_TYPE_MPEG;
511 cx->mpg_data_received = cx->vbi_data_inserted = 0;
512 cx->dualwatch_jiffies = jiffies;
513 cx->dualwatch_stereo_mode = cx->params.audio_properties & 0x300;
514 cx->search_pack_header = 0;
515 break;
517 case CX18_ENC_STREAM_TYPE_TS:
518 captype = CAPTURE_CHANNEL_TYPE_TS;
519 break;
520 case CX18_ENC_STREAM_TYPE_YUV:
521 captype = CAPTURE_CHANNEL_TYPE_YUV;
522 break;
523 case CX18_ENC_STREAM_TYPE_PCM:
524 captype = CAPTURE_CHANNEL_TYPE_PCM;
525 break;
526 case CX18_ENC_STREAM_TYPE_VBI:
527 #ifdef CX18_ENCODER_PARSES_SLICED
528 captype = cx18_raw_vbi(cx) ?
529 CAPTURE_CHANNEL_TYPE_VBI : CAPTURE_CHANNEL_TYPE_SLICED_VBI;
530 #else
532 * Currently we set things up so that Sliced VBI from the
533 * digitizer is handled as Raw VBI by the encoder
535 captype = CAPTURE_CHANNEL_TYPE_VBI;
536 #endif
537 cx->vbi.frame = 0;
538 cx->vbi.inserted_frame = 0;
539 memset(cx->vbi.sliced_mpeg_size,
540 0, sizeof(cx->vbi.sliced_mpeg_size));
541 break;
542 default:
543 return -EINVAL;
546 /* Clear Streamoff flags in case left from last capture */
547 clear_bit(CX18_F_S_STREAMOFF, &s->s_flags);
549 cx18_vapi_result(cx, data, CX18_CREATE_TASK, 1, CPU_CMD_MASK_CAPTURE);
550 s->handle = data[0];
551 cx18_vapi(cx, CX18_CPU_SET_CHANNEL_TYPE, 2, s->handle, captype);
554 * For everything but CAPTURE_CHANNEL_TYPE_TS, play it safe and
555 * set up all the parameters, as it is not obvious which parameters the
556 * firmware shares across capture channel types and which it does not.
558 * Some of the cx18_vapi() calls below apply to only certain capture
559 * channel types. We're hoping there's no harm in calling most of them
560 * anyway, as long as the values are all consistent. Setting some
561 * shared parameters will have no effect once an analog capture channel
562 * has started streaming.
564 if (captype != CAPTURE_CHANNEL_TYPE_TS) {
565 cx18_vapi(cx, CX18_CPU_SET_VER_CROP_LINE, 2, s->handle, 0);
566 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 3, 1);
567 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 8, 0);
568 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 4, 1);
571 * Audio related reset according to
572 * Documentation/video4linux/cx2341x/fw-encoder-api.txt
574 if (atomic_read(&cx->ana_capturing) == 0)
575 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2,
576 s->handle, 12);
579 * Number of lines for Field 1 & Field 2 according to
580 * Documentation/video4linux/cx2341x/fw-encoder-api.txt
581 * Field 1 is 312 for 625 line systems in BT.656
582 * Field 2 is 313 for 625 line systems in BT.656
584 cx18_vapi(cx, CX18_CPU_SET_CAPTURE_LINE_NO, 3,
585 s->handle, 312, 313);
587 if (cx->v4l2_cap & V4L2_CAP_VBI_CAPTURE)
588 cx18_vbi_setup(s);
591 * assign program index info.
592 * Mask 7: select I/P/B, Num_req: 400 max
593 * FIXME - currently we have this hardcoded as disabled
595 cx18_vapi_result(cx, data, CX18_CPU_SET_INDEXTABLE, 1, 0);
597 /* Call out to the common CX2341x API setup for user controls */
598 priv.cx = cx;
599 priv.s = s;
600 cx2341x_update(&priv, cx18_api_func, NULL, &cx->params);
603 * When starting a capture and we're set for radio,
604 * ensure the video is muted, despite the user control.
606 if (!cx->params.video_mute &&
607 test_bit(CX18_F_I_RADIO_USER, &cx->i_flags))
608 cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2, s->handle,
609 (cx->params.video_mute_yuv << 8) | 1);
612 if (atomic_read(&cx->tot_capturing) == 0) {
613 clear_bit(CX18_F_I_EOS, &cx->i_flags);
614 cx18_write_reg(cx, 7, CX18_DSP0_INTERRUPT_MASK);
617 cx18_vapi(cx, CX18_CPU_DE_SET_MDL_ACK, 3, s->handle,
618 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][0] - cx->enc_mem,
619 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][1] - cx->enc_mem);
621 /* Init all the cpu_mdls for this stream */
622 cx18_flush_queues(s);
623 spin_lock(&s->q_free.lock);
624 list_for_each_entry(buf, &s->q_free.list, list) {
625 cx18_writel(cx, buf->dma_handle,
626 &cx->scb->cpu_mdl[buf->id].paddr);
627 cx18_writel(cx, s->buf_size, &cx->scb->cpu_mdl[buf->id].length);
629 spin_unlock(&s->q_free.lock);
630 _cx18_stream_load_fw_queue(s);
632 /* begin_capture */
633 if (cx18_vapi(cx, CX18_CPU_CAPTURE_START, 1, s->handle)) {
634 CX18_DEBUG_WARN("Error starting capture!\n");
635 /* Ensure we're really not capturing before releasing MDLs */
636 set_bit(CX18_F_S_STOPPING, &s->s_flags);
637 if (s->type == CX18_ENC_STREAM_TYPE_MPG)
638 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, 1);
639 else
640 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
641 clear_bit(CX18_F_S_STREAMING, &s->s_flags);
642 /* FIXME - CX18_F_S_STREAMOFF as well? */
643 cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
644 cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
645 s->handle = CX18_INVALID_TASK_HANDLE;
646 clear_bit(CX18_F_S_STOPPING, &s->s_flags);
647 if (atomic_read(&cx->tot_capturing) == 0) {
648 set_bit(CX18_F_I_EOS, &cx->i_flags);
649 cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
651 return -EINVAL;
654 /* you're live! sit back and await interrupts :) */
655 if (captype != CAPTURE_CHANNEL_TYPE_TS)
656 atomic_inc(&cx->ana_capturing);
657 atomic_inc(&cx->tot_capturing);
658 return 0;
661 void cx18_stop_all_captures(struct cx18 *cx)
663 int i;
665 for (i = CX18_MAX_STREAMS - 1; i >= 0; i--) {
666 struct cx18_stream *s = &cx->streams[i];
668 if (s->video_dev == NULL && s->dvb.enabled == 0)
669 continue;
670 if (test_bit(CX18_F_S_STREAMING, &s->s_flags))
671 cx18_stop_v4l2_encode_stream(s, 0);
675 int cx18_stop_v4l2_encode_stream(struct cx18_stream *s, int gop_end)
677 struct cx18 *cx = s->cx;
678 unsigned long then;
680 if (s->video_dev == NULL && s->dvb.enabled == 0)
681 return -EINVAL;
683 /* This function assumes that you are allowed to stop the capture
684 and that we are actually capturing */
686 CX18_DEBUG_INFO("Stop Capture\n");
688 if (atomic_read(&cx->tot_capturing) == 0)
689 return 0;
691 set_bit(CX18_F_S_STOPPING, &s->s_flags);
692 if (s->type == CX18_ENC_STREAM_TYPE_MPG)
693 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, !gop_end);
694 else
695 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
697 then = jiffies;
699 if (s->type == CX18_ENC_STREAM_TYPE_MPG && gop_end) {
700 CX18_INFO("ignoring gop_end: not (yet?) supported by the firmware\n");
703 if (s->type != CX18_ENC_STREAM_TYPE_TS)
704 atomic_dec(&cx->ana_capturing);
705 atomic_dec(&cx->tot_capturing);
707 /* Clear capture and no-read bits */
708 clear_bit(CX18_F_S_STREAMING, &s->s_flags);
710 /* Tell the CX23418 it can't use our buffers anymore */
711 cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
713 cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
714 s->handle = CX18_INVALID_TASK_HANDLE;
715 clear_bit(CX18_F_S_STOPPING, &s->s_flags);
717 if (atomic_read(&cx->tot_capturing) > 0)
718 return 0;
720 cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
721 wake_up(&s->waitq);
723 return 0;
726 u32 cx18_find_handle(struct cx18 *cx)
728 int i;
730 /* find first available handle to be used for global settings */
731 for (i = 0; i < CX18_MAX_STREAMS; i++) {
732 struct cx18_stream *s = &cx->streams[i];
734 if (s->video_dev && (s->handle != CX18_INVALID_TASK_HANDLE))
735 return s->handle;
737 return CX18_INVALID_TASK_HANDLE;
740 struct cx18_stream *cx18_handle_to_stream(struct cx18 *cx, u32 handle)
742 int i;
743 struct cx18_stream *s;
745 if (handle == CX18_INVALID_TASK_HANDLE)
746 return NULL;
748 for (i = 0; i < CX18_MAX_STREAMS; i++) {
749 s = &cx->streams[i];
750 if (s->handle != handle)
751 continue;
752 if (s->video_dev || s->dvb.enabled)
753 return s;
755 return NULL;