1 /*
2  *  cx18 init/start/stop/exit stream functions
3  *
4  *  Derived from ivtv-streams.c
5  *
6  *  Copyright (C) 2007  Hans Verkuil <hverkuil@xs4all.nl>
7  *  Copyright (C) 2008  Andy Walls <awalls@md.metrocast.net>
8  *
9  *  This program is free software; you can redistribute it and/or modify
10  *  it under the terms of the GNU General Public License as published by
11  *  the Free Software Foundation; either version 2 of the License, or
12  *  (at your option) any later version.
13  *
14  *  This program is distributed in the hope that it will be useful,
15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  *  GNU General Public License for more details.
18  *
19  *  You should have received a copy of the GNU General Public License
20  *  along with this program; if not, write to the Free Software
21  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
22  *  02111-1307  USA
23  */
24 
25 #include "cx18-driver.h"
26 #include "cx18-io.h"
27 #include "cx18-fileops.h"
28 #include "cx18-mailbox.h"
29 #include "cx18-i2c.h"
30 #include "cx18-queue.h"
31 #include "cx18-ioctl.h"
32 #include "cx18-streams.h"
33 #include "cx18-cards.h"
34 #include "cx18-scb.h"
35 #include "cx18-dvb.h"
36 
37 #define CX18_DSP0_INTERRUPT_MASK     	0xd0004C
38 
39 static struct v4l2_file_operations cx18_v4l2_enc_fops = {
40 	.owner = THIS_MODULE,
41 	.read = cx18_v4l2_read,
42 	.open = cx18_v4l2_open,
43 	.unlocked_ioctl = video_ioctl2,
44 	.release = cx18_v4l2_close,
45 	.poll = cx18_v4l2_enc_poll,
46 	.mmap = cx18_v4l2_mmap,
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 } cx18_stream_info[] = {
62 	{	/* CX18_ENC_STREAM_TYPE_MPG */
63 		"encoder MPEG",
64 		VFL_TYPE_GRABBER, 0,
65 		PCI_DMA_FROMDEVICE,
66 	},
67 	{	/* CX18_ENC_STREAM_TYPE_TS */
68 		"TS",
69 		VFL_TYPE_GRABBER, -1,
70 		PCI_DMA_FROMDEVICE,
71 	},
72 	{	/* CX18_ENC_STREAM_TYPE_YUV */
73 		"encoder YUV",
74 		VFL_TYPE_GRABBER, CX18_V4L2_ENC_YUV_OFFSET,
75 		PCI_DMA_FROMDEVICE,
76 	},
77 	{	/* CX18_ENC_STREAM_TYPE_VBI */
78 		"encoder VBI",
79 		VFL_TYPE_VBI, 0,
80 		PCI_DMA_FROMDEVICE,
81 	},
82 	{	/* CX18_ENC_STREAM_TYPE_PCM */
83 		"encoder PCM audio",
84 		VFL_TYPE_GRABBER, CX18_V4L2_ENC_PCM_OFFSET,
85 		PCI_DMA_FROMDEVICE,
86 	},
87 	{	/* CX18_ENC_STREAM_TYPE_IDX */
88 		"encoder IDX",
89 		VFL_TYPE_GRABBER, -1,
90 		PCI_DMA_FROMDEVICE,
91 	},
92 	{	/* CX18_ENC_STREAM_TYPE_RAD */
93 		"encoder radio",
94 		VFL_TYPE_RADIO, 0,
95 		PCI_DMA_NONE,
96 	},
97 };
98 
99 
100 static void cx18_dma_free(struct videobuf_queue *q,
101 	struct cx18_stream *s, struct cx18_videobuf_buffer *buf)
102 {
103 	videobuf_waiton(q, &buf->vb, 0, 0);
104 	videobuf_vmalloc_free(&buf->vb);
105 	buf->vb.state = VIDEOBUF_NEEDS_INIT;
106 }
107 
108 static int cx18_prepare_buffer(struct videobuf_queue *q,
109 	struct cx18_stream *s,
110 	struct cx18_videobuf_buffer *buf,
111 	u32 pixelformat,
112 	unsigned int width, unsigned int height,
113 	enum v4l2_field field)
114 {
115         struct cx18 *cx = s->cx;
116 	int rc = 0;
117 
118 	/* check settings */
119 	buf->bytes_used = 0;
120 
121 	if ((width  < 48) || (height < 32))
122 		return -EINVAL;
123 
124 	buf->vb.size = (width * height * 2);
125 	if ((buf->vb.baddr != 0) && (buf->vb.bsize < buf->vb.size))
126 		return -EINVAL;
127 
128 	/* alloc + fill struct (if changed) */
129 	if (buf->vb.width != width || buf->vb.height != height ||
130 	    buf->vb.field != field || s->pixelformat != pixelformat ||
131 	    buf->tvnorm != cx->std) {
132 
133 		buf->vb.width  = width;
134 		buf->vb.height = height;
135 		buf->vb.field  = field;
136 		buf->tvnorm    = cx->std;
137 		s->pixelformat = pixelformat;
138 
139 		/* HM12 YUV size is (Y=(h*720) + UV=(h*(720/2)))
140 		   UYUV YUV size is (Y=(h*720) + UV=(h*(720))) */
141 		if (s->pixelformat == V4L2_PIX_FMT_HM12)
142 			s->vb_bytes_per_frame = height * 720 * 3 / 2;
143 		else
144 			s->vb_bytes_per_frame = height * 720 * 2;
145 		cx18_dma_free(q, s, buf);
146 	}
147 
148 	if ((buf->vb.baddr != 0) && (buf->vb.bsize < buf->vb.size))
149 		return -EINVAL;
150 
151 	if (buf->vb.field == 0)
152 		buf->vb.field = V4L2_FIELD_INTERLACED;
153 
154 	if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
155 		buf->vb.width  = width;
156 		buf->vb.height = height;
157 		buf->vb.field  = field;
158 		buf->tvnorm    = cx->std;
159 		s->pixelformat = pixelformat;
160 
161 		/* HM12 YUV size is (Y=(h*720) + UV=(h*(720/2)))
162 		   UYUV YUV size is (Y=(h*720) + UV=(h*(720))) */
163 		if (s->pixelformat == V4L2_PIX_FMT_HM12)
164 			s->vb_bytes_per_frame = height * 720 * 3 / 2;
165 		else
166 			s->vb_bytes_per_frame = height * 720 * 2;
167 		rc = videobuf_iolock(q, &buf->vb, NULL);
168 		if (rc != 0)
169 			goto fail;
170 	}
171 	buf->vb.state = VIDEOBUF_PREPARED;
172 	return 0;
173 
174 fail:
175 	cx18_dma_free(q, s, buf);
176 	return rc;
177 
178 }
179 
180 /* VB_MIN_BUFSIZE is lcm(1440 * 480, 1440 * 576)
181    1440 is a single line of 4:2:2 YUV at 720 luma samples wide
182 */
183 #define VB_MIN_BUFFERS 32
184 #define VB_MIN_BUFSIZE 4147200
185 
186 static int buffer_setup(struct videobuf_queue *q,
187 	unsigned int *count, unsigned int *size)
188 {
189 	struct cx18_stream *s = q->priv_data;
190 	struct cx18 *cx = s->cx;
191 
192 	*size = 2 * cx->cxhdl.width * cx->cxhdl.height;
193 	if (*count == 0)
194 		*count = VB_MIN_BUFFERS;
195 
196 	while (*size * *count > VB_MIN_BUFFERS * VB_MIN_BUFSIZE)
197 		(*count)--;
198 
199 	q->field = V4L2_FIELD_INTERLACED;
200 	q->last = V4L2_FIELD_INTERLACED;
201 
202 	return 0;
203 }
204 
205 static int buffer_prepare(struct videobuf_queue *q,
206 	struct videobuf_buffer *vb,
207 	enum v4l2_field field)
208 {
209 	struct cx18_videobuf_buffer *buf =
210 		container_of(vb, struct cx18_videobuf_buffer, vb);
211 	struct cx18_stream *s = q->priv_data;
212 	struct cx18 *cx = s->cx;
213 
214 	return cx18_prepare_buffer(q, s, buf, s->pixelformat,
215 		cx->cxhdl.width, cx->cxhdl.height, field);
216 }
217 
218 static void buffer_release(struct videobuf_queue *q,
219 	struct videobuf_buffer *vb)
220 {
221 	struct cx18_videobuf_buffer *buf =
222 		container_of(vb, struct cx18_videobuf_buffer, vb);
223 	struct cx18_stream *s = q->priv_data;
224 
225 	cx18_dma_free(q, s, buf);
226 }
227 
228 static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
229 {
230 	struct cx18_videobuf_buffer *buf =
231 		container_of(vb, struct cx18_videobuf_buffer, vb);
232 	struct cx18_stream *s = q->priv_data;
233 
234 	buf->vb.state = VIDEOBUF_QUEUED;
235 
236 	list_add_tail(&buf->vb.queue, &s->vb_capture);
237 }
238 
239 static struct videobuf_queue_ops cx18_videobuf_qops = {
240 	.buf_setup    = buffer_setup,
241 	.buf_prepare  = buffer_prepare,
242 	.buf_queue    = buffer_queue,
243 	.buf_release  = buffer_release,
244 };
245 
246 static void cx18_stream_init(struct cx18 *cx, int type)
247 {
248 	struct cx18_stream *s = &cx->streams[type];
249 	struct video_device *video_dev = s->video_dev;
250 
251 	/* we need to keep video_dev, so restore it afterwards */
252 	memset(s, 0, sizeof(*s));
253 	s->video_dev = video_dev;
254 
255 	/* initialize cx18_stream fields */
256 	s->dvb = NULL;
257 	s->cx = cx;
258 	s->type = type;
259 	s->name = cx18_stream_info[type].name;
260 	s->handle = CX18_INVALID_TASK_HANDLE;
261 
262 	s->dma = cx18_stream_info[type].dma;
263 	s->buffers = cx->stream_buffers[type];
264 	s->buf_size = cx->stream_buf_size[type];
265 	INIT_LIST_HEAD(&s->buf_pool);
266 	s->bufs_per_mdl = 1;
267 	s->mdl_size = s->buf_size * s->bufs_per_mdl;
268 
269 	init_waitqueue_head(&s->waitq);
270 	s->id = -1;
271 	spin_lock_init(&s->q_free.lock);
272 	cx18_queue_init(&s->q_free);
273 	spin_lock_init(&s->q_busy.lock);
274 	cx18_queue_init(&s->q_busy);
275 	spin_lock_init(&s->q_full.lock);
276 	cx18_queue_init(&s->q_full);
277 	spin_lock_init(&s->q_idle.lock);
278 	cx18_queue_init(&s->q_idle);
279 
280 	INIT_WORK(&s->out_work_order, cx18_out_work_handler);
281 
282 	INIT_LIST_HEAD(&s->vb_capture);
283 	s->vb_timeout.function = cx18_vb_timeout;
284 	s->vb_timeout.data = (unsigned long)s;
285 	init_timer(&s->vb_timeout);
286 	spin_lock_init(&s->vb_lock);
287 	if (type == CX18_ENC_STREAM_TYPE_YUV) {
288 		spin_lock_init(&s->vbuf_q_lock);
289 
290 		s->vb_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
291 		videobuf_queue_vmalloc_init(&s->vbuf_q, &cx18_videobuf_qops,
292 			&cx->pci_dev->dev, &s->vbuf_q_lock,
293 			V4L2_BUF_TYPE_VIDEO_CAPTURE,
294 			V4L2_FIELD_INTERLACED,
295 			sizeof(struct cx18_videobuf_buffer),
296 			s, &cx->serialize_lock);
297 
298 		/* Assume the previous pixel default */
299 		s->pixelformat = V4L2_PIX_FMT_HM12;
300 		s->vb_bytes_per_frame = cx->cxhdl.height * 720 * 3 / 2;
301 	}
302 }
303 
304 static int cx18_prep_dev(struct cx18 *cx, int type)
305 {
306 	struct cx18_stream *s = &cx->streams[type];
307 	u32 cap = cx->v4l2_cap;
308 	int num_offset = cx18_stream_info[type].num_offset;
309 	int num = cx->instance + cx18_first_minor + num_offset;
310 
311 	/*
312 	 * These five fields are always initialized.
313 	 * For analog capture related streams, if video_dev == NULL then the
314 	 * stream is not in use.
315 	 * For the TS stream, if dvb == NULL then the stream is not in use.
316 	 * In those cases no other fields but these four can be used.
317 	 */
318 	s->video_dev = NULL;
319 	s->dvb = NULL;
320 	s->cx = cx;
321 	s->type = type;
322 	s->name = cx18_stream_info[type].name;
323 
324 	/* Check whether the radio is supported */
325 	if (type == CX18_ENC_STREAM_TYPE_RAD && !(cap & V4L2_CAP_RADIO))
326 		return 0;
327 
328 	/* Check whether VBI is supported */
329 	if (type == CX18_ENC_STREAM_TYPE_VBI &&
330 	    !(cap & (V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_CAPTURE)))
331 		return 0;
332 
333 	/* User explicitly selected 0 buffers for these streams, so don't
334 	   create them. */
335 	if (cx18_stream_info[type].dma != PCI_DMA_NONE &&
336 	    cx->stream_buffers[type] == 0) {
337 		CX18_INFO("Disabled %s device\n", cx18_stream_info[type].name);
338 		return 0;
339 	}
340 
341 	cx18_stream_init(cx, type);
342 
343 	/* Allocate the cx18_dvb struct only for the TS on cards with DTV */
344 	if (type == CX18_ENC_STREAM_TYPE_TS) {
345 		if (cx->card->hw_all & CX18_HW_DVB) {
346 			s->dvb = kzalloc(sizeof(struct cx18_dvb), GFP_KERNEL);
347 			if (s->dvb == NULL) {
348 				CX18_ERR("Couldn't allocate cx18_dvb structure"
349 					 " for %s\n", s->name);
350 				return -ENOMEM;
351 			}
352 		} else {
353 			/* Don't need buffers for the TS, if there is no DVB */
354 			s->buffers = 0;
355 		}
356 	}
357 
358 	if (num_offset == -1)
359 		return 0;
360 
361 	/* allocate and initialize the v4l2 video device structure */
362 	s->video_dev = video_device_alloc();
363 	if (s->video_dev == NULL) {
364 		CX18_ERR("Couldn't allocate v4l2 video_device for %s\n",
365 				s->name);
366 		return -ENOMEM;
367 	}
368 
369 	snprintf(s->video_dev->name, sizeof(s->video_dev->name), "%s %s",
370 		 cx->v4l2_dev.name, s->name);
371 
372 	s->video_dev->num = num;
373 	s->video_dev->v4l2_dev = &cx->v4l2_dev;
374 	s->video_dev->fops = &cx18_v4l2_enc_fops;
375 	s->video_dev->release = video_device_release;
376 	s->video_dev->tvnorms = V4L2_STD_ALL;
377 	s->video_dev->lock = &cx->serialize_lock;
378 	set_bit(V4L2_FL_USE_FH_PRIO, &s->video_dev->flags);
379 	cx18_set_funcs(s->video_dev);
380 	return 0;
381 }
382 
383 /* Initialize v4l2 variables and register v4l2 devices */
384 int cx18_streams_setup(struct cx18 *cx)
385 {
386 	int type, ret;
387 
388 	/* Setup V4L2 Devices */
389 	for (type = 0; type < CX18_MAX_STREAMS; type++) {
390 		/* Prepare device */
391 		ret = cx18_prep_dev(cx, type);
392 		if (ret < 0)
393 			break;
394 
395 		/* Allocate Stream */
396 		ret = cx18_stream_alloc(&cx->streams[type]);
397 		if (ret < 0)
398 			break;
399 	}
400 	if (type == CX18_MAX_STREAMS)
401 		return 0;
402 
403 	/* One or more streams could not be initialized. Clean 'em all up. */
404 	cx18_streams_cleanup(cx, 0);
405 	return ret;
406 }
407 
408 static int cx18_reg_dev(struct cx18 *cx, int type)
409 {
410 	struct cx18_stream *s = &cx->streams[type];
411 	int vfl_type = cx18_stream_info[type].vfl_type;
412 	const char *name;
413 	int num, ret;
414 
415 	if (type == CX18_ENC_STREAM_TYPE_TS && s->dvb != NULL) {
416 		ret = cx18_dvb_register(s);
417 		if (ret < 0) {
418 			CX18_ERR("DVB failed to register\n");
419 			return ret;
420 		}
421 	}
422 
423 	if (s->video_dev == NULL)
424 		return 0;
425 
426 	num = s->video_dev->num;
427 	/* card number + user defined offset + device offset */
428 	if (type != CX18_ENC_STREAM_TYPE_MPG) {
429 		struct cx18_stream *s_mpg = &cx->streams[CX18_ENC_STREAM_TYPE_MPG];
430 
431 		if (s_mpg->video_dev)
432 			num = s_mpg->video_dev->num
433 			    + cx18_stream_info[type].num_offset;
434 	}
435 	video_set_drvdata(s->video_dev, s);
436 
437 	/* Register device. First try the desired minor, then any free one. */
438 	ret = video_register_device_no_warn(s->video_dev, vfl_type, num);
439 	if (ret < 0) {
440 		CX18_ERR("Couldn't register v4l2 device for %s (device node number %d)\n",
441 			s->name, num);
442 		video_device_release(s->video_dev);
443 		s->video_dev = NULL;
444 		return ret;
445 	}
446 
447 	name = video_device_node_name(s->video_dev);
448 
449 	switch (vfl_type) {
450 	case VFL_TYPE_GRABBER:
451 		CX18_INFO("Registered device %s for %s (%d x %d.%02d kB)\n",
452 			  name, s->name, cx->stream_buffers[type],
453 			  cx->stream_buf_size[type] / 1024,
454 			  (cx->stream_buf_size[type] * 100 / 1024) % 100);
455 		break;
456 
457 	case VFL_TYPE_RADIO:
458 		CX18_INFO("Registered device %s for %s\n", name, s->name);
459 		break;
460 
461 	case VFL_TYPE_VBI:
462 		if (cx->stream_buffers[type])
463 			CX18_INFO("Registered device %s for %s "
464 				  "(%d x %d bytes)\n",
465 				  name, s->name, cx->stream_buffers[type],
466 				  cx->stream_buf_size[type]);
467 		else
468 			CX18_INFO("Registered device %s for %s\n",
469 				name, s->name);
470 		break;
471 	}
472 
473 	return 0;
474 }
475 
476 /* Register v4l2 devices */
477 int cx18_streams_register(struct cx18 *cx)
478 {
479 	int type;
480 	int err;
481 	int ret = 0;
482 
483 	/* Register V4L2 devices */
484 	for (type = 0; type < CX18_MAX_STREAMS; type++) {
485 		err = cx18_reg_dev(cx, type);
486 		if (err && ret == 0)
487 			ret = err;
488 	}
489 
490 	if (ret == 0)
491 		return 0;
492 
493 	/* One or more streams could not be initialized. Clean 'em all up. */
494 	cx18_streams_cleanup(cx, 1);
495 	return ret;
496 }
497 
498 /* Unregister v4l2 devices */
499 void cx18_streams_cleanup(struct cx18 *cx, int unregister)
500 {
501 	struct video_device *vdev;
502 	int type;
503 
504 	/* Teardown all streams */
505 	for (type = 0; type < CX18_MAX_STREAMS; type++) {
506 
507 		/* The TS has a cx18_dvb structure, not a video_device */
508 		if (type == CX18_ENC_STREAM_TYPE_TS) {
509 			if (cx->streams[type].dvb != NULL) {
510 				if (unregister)
511 					cx18_dvb_unregister(&cx->streams[type]);
512 				kfree(cx->streams[type].dvb);
513 				cx->streams[type].dvb = NULL;
514 				cx18_stream_free(&cx->streams[type]);
515 			}
516 			continue;
517 		}
518 
519 		/* No struct video_device, but can have buffers allocated */
520 		if (type == CX18_ENC_STREAM_TYPE_IDX) {
521 			/* If the module params didn't inhibit IDX ... */
522 			if (cx->stream_buffers[type] != 0) {
523 				cx->stream_buffers[type] = 0;
524 				/*
525 				 * Before calling cx18_stream_free(),
526 				 * check if the IDX stream was actually set up.
527 				 * Needed, since the cx18_probe() error path
528 				 * exits through here as well as normal clean up
529 				 */
530 				if (cx->streams[type].buffers != 0)
531 					cx18_stream_free(&cx->streams[type]);
532 			}
533 			continue;
534 		}
535 
536 		/* If struct video_device exists, can have buffers allocated */
537 		vdev = cx->streams[type].video_dev;
538 
539 		cx->streams[type].video_dev = NULL;
540 		if (vdev == NULL)
541 			continue;
542 
543 		if (type == CX18_ENC_STREAM_TYPE_YUV)
544 			videobuf_mmap_free(&cx->streams[type].vbuf_q);
545 
546 		cx18_stream_free(&cx->streams[type]);
547 
548 		/* Unregister or release device */
549 		if (unregister)
550 			video_unregister_device(vdev);
551 		else
552 			video_device_release(vdev);
553 	}
554 }
555 
556 static void cx18_vbi_setup(struct cx18_stream *s)
557 {
558 	struct cx18 *cx = s->cx;
559 	int raw = cx18_raw_vbi(cx);
560 	u32 data[CX2341X_MBOX_MAX_DATA];
561 	int lines;
562 
563 	if (cx->is_60hz) {
564 		cx->vbi.count = 12;
565 		cx->vbi.start[0] = 10;
566 		cx->vbi.start[1] = 273;
567 	} else {        /* PAL/SECAM */
568 		cx->vbi.count = 18;
569 		cx->vbi.start[0] = 6;
570 		cx->vbi.start[1] = 318;
571 	}
572 
573 	/* setup VBI registers */
574 	if (raw)
575 		v4l2_subdev_call(cx->sd_av, vbi, s_raw_fmt, &cx->vbi.in.fmt.vbi);
576 	else
577 		v4l2_subdev_call(cx->sd_av, vbi, s_sliced_fmt, &cx->vbi.in.fmt.sliced);
578 
579 	/*
580 	 * Send the CX18_CPU_SET_RAW_VBI_PARAM API command to setup Encoder Raw
581 	 * VBI when the first analog capture channel starts, as once it starts
582 	 * (e.g. MPEG), we can't effect any change in the Encoder Raw VBI setup
583 	 * (i.e. for the VBI capture channels).  We also send it for each
584 	 * analog capture channel anyway just to make sure we get the proper
585 	 * behavior
586 	 */
587 	if (raw) {
588 		lines = cx->vbi.count * 2;
589 	} else {
590 		/*
591 		 * For 525/60 systems, according to the VIP 2 & BT.656 std:
592 		 * The EAV RP code's Field bit toggles on line 4, a few lines
593 		 * after the Vertcal Blank bit has already toggled.
594 		 * Tell the encoder to capture 21-4+1=18 lines per field,
595 		 * since we want lines 10 through 21.
596 		 *
597 		 * For 625/50 systems, according to the VIP 2 & BT.656 std:
598 		 * The EAV RP code's Field bit toggles on line 1, a few lines
599 		 * after the Vertcal Blank bit has already toggled.
600 		 * (We've actually set the digitizer so that the Field bit
601 		 * toggles on line 2.) Tell the encoder to capture 23-2+1=22
602 		 * lines per field, since we want lines 6 through 23.
603 		 */
604 		lines = cx->is_60hz ? (21 - 4 + 1) * 2 : (23 - 2 + 1) * 2;
605 	}
606 
607 	data[0] = s->handle;
608 	/* Lines per field */
609 	data[1] = (lines / 2) | ((lines / 2) << 16);
610 	/* bytes per line */
611 	data[2] = (raw ? vbi_active_samples
612 		       : (cx->is_60hz ? vbi_hblank_samples_60Hz
613 				      : vbi_hblank_samples_50Hz));
614 	/* Every X number of frames a VBI interrupt arrives
615 	   (frames as in 25 or 30 fps) */
616 	data[3] = 1;
617 	/*
618 	 * Set the SAV/EAV RP codes to look for as start/stop points
619 	 * when in VIP-1.1 mode
620 	 */
621 	if (raw) {
622 		/*
623 		 * Start codes for beginning of "active" line in vertical blank
624 		 * 0x20 (               VerticalBlank                )
625 		 * 0x60 (     EvenField VerticalBlank                )
626 		 */
627 		data[4] = 0x20602060;
628 		/*
629 		 * End codes for end of "active" raw lines and regular lines
630 		 * 0x30 (               VerticalBlank HorizontalBlank)
631 		 * 0x70 (     EvenField VerticalBlank HorizontalBlank)
632 		 * 0x90 (Task                         HorizontalBlank)
633 		 * 0xd0 (Task EvenField               HorizontalBlank)
634 		 */
635 		data[5] = 0x307090d0;
636 	} else {
637 		/*
638 		 * End codes for active video, we want data in the hblank region
639 		 * 0xb0 (Task         0 VerticalBlank HorizontalBlank)
640 		 * 0xf0 (Task EvenField VerticalBlank HorizontalBlank)
641 		 *
642 		 * Since the V bit is only allowed to toggle in the EAV RP code,
643 		 * just before the first active region line, these two
644 		 * are problematic:
645 		 * 0x90 (Task                         HorizontalBlank)
646 		 * 0xd0 (Task EvenField               HorizontalBlank)
647 		 *
648 		 * We have set the digitzer such that we don't have to worry
649 		 * about these problem codes.
650 		 */
651 		data[4] = 0xB0F0B0F0;
652 		/*
653 		 * Start codes for beginning of active line in vertical blank
654 		 * 0xa0 (Task           VerticalBlank                )
655 		 * 0xe0 (Task EvenField VerticalBlank                )
656 		 */
657 		data[5] = 0xA0E0A0E0;
658 	}
659 
660 	CX18_DEBUG_INFO("Setup VBI h: %d lines %x bpl %d fr %d %x %x\n",
661 			data[0], data[1], data[2], data[3], data[4], data[5]);
662 
663 	cx18_api(cx, CX18_CPU_SET_RAW_VBI_PARAM, 6, data);
664 }
665 
666 void cx18_stream_rotate_idx_mdls(struct cx18 *cx)
667 {
668 	struct cx18_stream *s = &cx->streams[CX18_ENC_STREAM_TYPE_IDX];
669 	struct cx18_mdl *mdl;
670 
671 	if (!cx18_stream_enabled(s))
672 		return;
673 
674 	/* Return if the firmware is not running low on MDLs */
675 	if ((atomic_read(&s->q_free.depth) + atomic_read(&s->q_busy.depth)) >=
676 					    CX18_ENC_STREAM_TYPE_IDX_FW_MDL_MIN)
677 		return;
678 
679 	/* Return if there are no MDLs to rotate back to the firmware */
680 	if (atomic_read(&s->q_full.depth) < 2)
681 		return;
682 
683 	/*
684 	 * Take the oldest IDX MDL still holding data, and discard its index
685 	 * entries by scheduling the MDL to go back to the firmware
686 	 */
687 	mdl = cx18_dequeue(s, &s->q_full);
688 	if (mdl != NULL)
689 		cx18_enqueue(s, mdl, &s->q_free);
690 }
691 
692 static
693 struct cx18_queue *_cx18_stream_put_mdl_fw(struct cx18_stream *s,
694 					   struct cx18_mdl *mdl)
695 {
696 	struct cx18 *cx = s->cx;
697 	struct cx18_queue *q;
698 
699 	/* Don't give it to the firmware, if we're not running a capture */
700 	if (s->handle == CX18_INVALID_TASK_HANDLE ||
701 	    test_bit(CX18_F_S_STOPPING, &s->s_flags) ||
702 	    !test_bit(CX18_F_S_STREAMING, &s->s_flags))
703 		return cx18_enqueue(s, mdl, &s->q_free);
704 
705 	q = cx18_enqueue(s, mdl, &s->q_busy);
706 	if (q != &s->q_busy)
707 		return q; /* The firmware has the max MDLs it can handle */
708 
709 	cx18_mdl_sync_for_device(s, mdl);
710 	cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, s->handle,
711 		  (void __iomem *) &cx->scb->cpu_mdl[mdl->id] - cx->enc_mem,
712 		  s->bufs_per_mdl, mdl->id, s->mdl_size);
713 	return q;
714 }
715 
716 static
717 void _cx18_stream_load_fw_queue(struct cx18_stream *s)
718 {
719 	struct cx18_queue *q;
720 	struct cx18_mdl *mdl;
721 
722 	if (atomic_read(&s->q_free.depth) == 0 ||
723 	    atomic_read(&s->q_busy.depth) >= CX18_MAX_FW_MDLS_PER_STREAM)
724 		return;
725 
726 	/* Move from q_free to q_busy notifying the firmware, until the limit */
727 	do {
728 		mdl = cx18_dequeue(s, &s->q_free);
729 		if (mdl == NULL)
730 			break;
731 		q = _cx18_stream_put_mdl_fw(s, mdl);
732 	} while (atomic_read(&s->q_busy.depth) < CX18_MAX_FW_MDLS_PER_STREAM
733 		 && q == &s->q_busy);
734 }
735 
736 void cx18_out_work_handler(struct work_struct *work)
737 {
738 	struct cx18_stream *s =
739 			 container_of(work, struct cx18_stream, out_work_order);
740 
741 	_cx18_stream_load_fw_queue(s);
742 }
743 
744 static void cx18_stream_configure_mdls(struct cx18_stream *s)
745 {
746 	cx18_unload_queues(s);
747 
748 	switch (s->type) {
749 	case CX18_ENC_STREAM_TYPE_YUV:
750 		/*
751 		 * Height should be a multiple of 32 lines.
752 		 * Set the MDL size to the exact size needed for one frame.
753 		 * Use enough buffers per MDL to cover the MDL size
754 		 */
755 		if (s->pixelformat == V4L2_PIX_FMT_HM12)
756 			s->mdl_size = 720 * s->cx->cxhdl.height * 3 / 2;
757 		else
758 			s->mdl_size = 720 * s->cx->cxhdl.height * 2;
759 		s->bufs_per_mdl = s->mdl_size / s->buf_size;
760 		if (s->mdl_size % s->buf_size)
761 			s->bufs_per_mdl++;
762 		break;
763 	case CX18_ENC_STREAM_TYPE_VBI:
764 		s->bufs_per_mdl = 1;
765 		if  (cx18_raw_vbi(s->cx)) {
766 			s->mdl_size = (s->cx->is_60hz ? 12 : 18)
767 						       * 2 * vbi_active_samples;
768 		} else {
769 			/*
770 			 * See comment in cx18_vbi_setup() below about the
771 			 * extra lines we capture in sliced VBI mode due to
772 			 * the lines on which EAV RP codes toggle.
773 			*/
774 			s->mdl_size = s->cx->is_60hz
775 				   ? (21 - 4 + 1) * 2 * vbi_hblank_samples_60Hz
776 				   : (23 - 2 + 1) * 2 * vbi_hblank_samples_50Hz;
777 		}
778 		break;
779 	default:
780 		s->bufs_per_mdl = 1;
781 		s->mdl_size = s->buf_size * s->bufs_per_mdl;
782 		break;
783 	}
784 
785 	cx18_load_queues(s);
786 }
787 
788 int cx18_start_v4l2_encode_stream(struct cx18_stream *s)
789 {
790 	u32 data[MAX_MB_ARGUMENTS];
791 	struct cx18 *cx = s->cx;
792 	int captype = 0;
793 	struct cx18_stream *s_idx;
794 
795 	if (!cx18_stream_enabled(s))
796 		return -EINVAL;
797 
798 	CX18_DEBUG_INFO("Start encoder stream %s\n", s->name);
799 
800 	switch (s->type) {
801 	case CX18_ENC_STREAM_TYPE_MPG:
802 		captype = CAPTURE_CHANNEL_TYPE_MPEG;
803 		cx->mpg_data_received = cx->vbi_data_inserted = 0;
804 		cx->dualwatch_jiffies = jiffies;
805 		cx->dualwatch_stereo_mode = v4l2_ctrl_g_ctrl(cx->cxhdl.audio_mode);
806 		cx->search_pack_header = 0;
807 		break;
808 
809 	case CX18_ENC_STREAM_TYPE_IDX:
810 		captype = CAPTURE_CHANNEL_TYPE_INDEX;
811 		break;
812 	case CX18_ENC_STREAM_TYPE_TS:
813 		captype = CAPTURE_CHANNEL_TYPE_TS;
814 		break;
815 	case CX18_ENC_STREAM_TYPE_YUV:
816 		captype = CAPTURE_CHANNEL_TYPE_YUV;
817 		break;
818 	case CX18_ENC_STREAM_TYPE_PCM:
819 		captype = CAPTURE_CHANNEL_TYPE_PCM;
820 		break;
821 	case CX18_ENC_STREAM_TYPE_VBI:
822 #ifdef CX18_ENCODER_PARSES_SLICED
823 		captype = cx18_raw_vbi(cx) ?
824 		     CAPTURE_CHANNEL_TYPE_VBI : CAPTURE_CHANNEL_TYPE_SLICED_VBI;
825 #else
826 		/*
827 		 * Currently we set things up so that Sliced VBI from the
828 		 * digitizer is handled as Raw VBI by the encoder
829 		 */
830 		captype = CAPTURE_CHANNEL_TYPE_VBI;
831 #endif
832 		cx->vbi.frame = 0;
833 		cx->vbi.inserted_frame = 0;
834 		memset(cx->vbi.sliced_mpeg_size,
835 			0, sizeof(cx->vbi.sliced_mpeg_size));
836 		break;
837 	default:
838 		return -EINVAL;
839 	}
840 
841 	/* Clear Streamoff flags in case left from last capture */
842 	clear_bit(CX18_F_S_STREAMOFF, &s->s_flags);
843 
844 	cx18_vapi_result(cx, data, CX18_CREATE_TASK, 1, CPU_CMD_MASK_CAPTURE);
845 	s->handle = data[0];
846 	cx18_vapi(cx, CX18_CPU_SET_CHANNEL_TYPE, 2, s->handle, captype);
847 
848 	/*
849 	 * For everything but CAPTURE_CHANNEL_TYPE_TS, play it safe and
850 	 * set up all the parameters, as it is not obvious which parameters the
851 	 * firmware shares across capture channel types and which it does not.
852 	 *
853 	 * Some of the cx18_vapi() calls below apply to only certain capture
854 	 * channel types.  We're hoping there's no harm in calling most of them
855 	 * anyway, as long as the values are all consistent.  Setting some
856 	 * shared parameters will have no effect once an analog capture channel
857 	 * has started streaming.
858 	 */
859 	if (captype != CAPTURE_CHANNEL_TYPE_TS) {
860 		cx18_vapi(cx, CX18_CPU_SET_VER_CROP_LINE, 2, s->handle, 0);
861 		cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 3, 1);
862 		cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 8, 0);
863 		cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 4, 1);
864 
865 		/*
866 		 * Audio related reset according to
867 		 * Documentation/video4linux/cx2341x/fw-encoder-api.txt
868 		 */
869 		if (atomic_read(&cx->ana_capturing) == 0)
870 			cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2,
871 				  s->handle, 12);
872 
873 		/*
874 		 * Number of lines for Field 1 & Field 2 according to
875 		 * Documentation/video4linux/cx2341x/fw-encoder-api.txt
876 		 * Field 1 is 312 for 625 line systems in BT.656
877 		 * Field 2 is 313 for 625 line systems in BT.656
878 		 */
879 		cx18_vapi(cx, CX18_CPU_SET_CAPTURE_LINE_NO, 3,
880 			  s->handle, 312, 313);
881 
882 		if (cx->v4l2_cap & V4L2_CAP_VBI_CAPTURE)
883 			cx18_vbi_setup(s);
884 
885 		/*
886 		 * Select to receive I, P, and B frame index entries, if the
887 		 * index stream is enabled.  Otherwise disable index entry
888 		 * generation.
889 		 */
890 		s_idx = &cx->streams[CX18_ENC_STREAM_TYPE_IDX];
891 		cx18_vapi_result(cx, data, CX18_CPU_SET_INDEXTABLE, 2,
892 				 s->handle, cx18_stream_enabled(s_idx) ? 7 : 0);
893 
894 		/* Call out to the common CX2341x API setup for user controls */
895 		cx->cxhdl.priv = s;
896 		cx2341x_handler_setup(&cx->cxhdl);
897 
898 		/*
899 		 * When starting a capture and we're set for radio,
900 		 * ensure the video is muted, despite the user control.
901 		 */
902 		if (!cx->cxhdl.video_mute &&
903 		    test_bit(CX18_F_I_RADIO_USER, &cx->i_flags))
904 			cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2, s->handle,
905 			  (v4l2_ctrl_g_ctrl(cx->cxhdl.video_mute_yuv) << 8) | 1);
906 
907 		/* Enable the Video Format Converter for UYVY 4:2:2 support,
908 		 * rather than the default HM12 Macroblovk 4:2:0 support.
909 		 */
910 		if (captype == CAPTURE_CHANNEL_TYPE_YUV) {
911 			if (s->pixelformat == V4L2_PIX_FMT_UYVY)
912 				cx18_vapi(cx, CX18_CPU_SET_VFC_PARAM, 2,
913 					s->handle, 1);
914 			else
915 				/* If in doubt, default to HM12 */
916 				cx18_vapi(cx, CX18_CPU_SET_VFC_PARAM, 2,
917 					s->handle, 0);
918 		}
919 	}
920 
921 	if (atomic_read(&cx->tot_capturing) == 0) {
922 		cx2341x_handler_set_busy(&cx->cxhdl, 1);
923 		clear_bit(CX18_F_I_EOS, &cx->i_flags);
924 		cx18_write_reg(cx, 7, CX18_DSP0_INTERRUPT_MASK);
925 	}
926 
927 	cx18_vapi(cx, CX18_CPU_DE_SET_MDL_ACK, 3, s->handle,
928 		(void __iomem *)&cx->scb->cpu_mdl_ack[s->type][0] - cx->enc_mem,
929 		(void __iomem *)&cx->scb->cpu_mdl_ack[s->type][1] - cx->enc_mem);
930 
931 	/* Init all the cpu_mdls for this stream */
932 	cx18_stream_configure_mdls(s);
933 	_cx18_stream_load_fw_queue(s);
934 
935 	/* begin_capture */
936 	if (cx18_vapi(cx, CX18_CPU_CAPTURE_START, 1, s->handle)) {
937 		CX18_DEBUG_WARN("Error starting capture!\n");
938 		/* Ensure we're really not capturing before releasing MDLs */
939 		set_bit(CX18_F_S_STOPPING, &s->s_flags);
940 		if (s->type == CX18_ENC_STREAM_TYPE_MPG)
941 			cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, 1);
942 		else
943 			cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
944 		clear_bit(CX18_F_S_STREAMING, &s->s_flags);
945 		/* FIXME - CX18_F_S_STREAMOFF as well? */
946 		cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
947 		cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
948 		s->handle = CX18_INVALID_TASK_HANDLE;
949 		clear_bit(CX18_F_S_STOPPING, &s->s_flags);
950 		if (atomic_read(&cx->tot_capturing) == 0) {
951 			set_bit(CX18_F_I_EOS, &cx->i_flags);
952 			cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
953 		}
954 		return -EINVAL;
955 	}
956 
957 	/* you're live! sit back and await interrupts :) */
958 	if (captype != CAPTURE_CHANNEL_TYPE_TS)
959 		atomic_inc(&cx->ana_capturing);
960 	atomic_inc(&cx->tot_capturing);
961 	return 0;
962 }
963 EXPORT_SYMBOL(cx18_start_v4l2_encode_stream);
964 
965 void cx18_stop_all_captures(struct cx18 *cx)
966 {
967 	int i;
968 
969 	for (i = CX18_MAX_STREAMS - 1; i >= 0; i--) {
970 		struct cx18_stream *s = &cx->streams[i];
971 
972 		if (!cx18_stream_enabled(s))
973 			continue;
974 		if (test_bit(CX18_F_S_STREAMING, &s->s_flags))
975 			cx18_stop_v4l2_encode_stream(s, 0);
976 	}
977 }
978 
979 int cx18_stop_v4l2_encode_stream(struct cx18_stream *s, int gop_end)
980 {
981 	struct cx18 *cx = s->cx;
982 
983 	if (!cx18_stream_enabled(s))
984 		return -EINVAL;
985 
986 	/* This function assumes that you are allowed to stop the capture
987 	   and that we are actually capturing */
988 
989 	CX18_DEBUG_INFO("Stop Capture\n");
990 
991 	if (atomic_read(&cx->tot_capturing) == 0)
992 		return 0;
993 
994 	set_bit(CX18_F_S_STOPPING, &s->s_flags);
995 	if (s->type == CX18_ENC_STREAM_TYPE_MPG)
996 		cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, !gop_end);
997 	else
998 		cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
999 
1000 	if (s->type == CX18_ENC_STREAM_TYPE_MPG && gop_end) {
1001 		CX18_INFO("ignoring gop_end: not (yet?) supported by the firmware\n");
1002 	}
1003 
1004 	if (s->type != CX18_ENC_STREAM_TYPE_TS)
1005 		atomic_dec(&cx->ana_capturing);
1006 	atomic_dec(&cx->tot_capturing);
1007 
1008 	/* Clear capture and no-read bits */
1009 	clear_bit(CX18_F_S_STREAMING, &s->s_flags);
1010 
1011 	/* Tell the CX23418 it can't use our buffers anymore */
1012 	cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
1013 
1014 	cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
1015 	s->handle = CX18_INVALID_TASK_HANDLE;
1016 	clear_bit(CX18_F_S_STOPPING, &s->s_flags);
1017 
1018 	if (atomic_read(&cx->tot_capturing) > 0)
1019 		return 0;
1020 
1021 	cx2341x_handler_set_busy(&cx->cxhdl, 0);
1022 	cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
1023 	wake_up(&s->waitq);
1024 
1025 	return 0;
1026 }
1027 EXPORT_SYMBOL(cx18_stop_v4l2_encode_stream);
1028 
1029 u32 cx18_find_handle(struct cx18 *cx)
1030 {
1031 	int i;
1032 
1033 	/* find first available handle to be used for global settings */
1034 	for (i = 0; i < CX18_MAX_STREAMS; i++) {
1035 		struct cx18_stream *s = &cx->streams[i];
1036 
1037 		if (s->video_dev && (s->handle != CX18_INVALID_TASK_HANDLE))
1038 			return s->handle;
1039 	}
1040 	return CX18_INVALID_TASK_HANDLE;
1041 }
1042 
1043 struct cx18_stream *cx18_handle_to_stream(struct cx18 *cx, u32 handle)
1044 {
1045 	int i;
1046 	struct cx18_stream *s;
1047 
1048 	if (handle == CX18_INVALID_TASK_HANDLE)
1049 		return NULL;
1050 
1051 	for (i = 0; i < CX18_MAX_STREAMS; i++) {
1052 		s = &cx->streams[i];
1053 		if (s->handle != handle)
1054 			continue;
1055 		if (cx18_stream_enabled(s))
1056 			return s;
1057 	}
1058 	return NULL;
1059 }
1060