1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *  Driver for the NXP SAA7164 PCIe bridge
4  *
5  *  Copyright (c) 2010-2015 Steven Toth <stoth@kernellabs.com>
6  */
7 
8 #include "saa7164.h"
9 
10 #define ENCODER_MAX_BITRATE 6500000
11 #define ENCODER_MIN_BITRATE 1000000
12 #define ENCODER_DEF_BITRATE 5000000
13 
14 /*
15  * This is a dummy non-zero value for the sizeimage field of v4l2_pix_format.
16  * It is not actually used for anything since this driver does not support
17  * stream I/O, only read(), and because this driver produces an MPEG stream
18  * and not discrete frames. But the V4L2 spec doesn't allow for this value
19  * to be 0, so set it to 0x10000 instead.
20  *
21  * If we ever change this driver to support stream I/O, then this field
22  * will be the size of the streaming buffers.
23  */
24 #define SAA7164_SIZEIMAGE (0x10000)
25 
26 static struct saa7164_tvnorm saa7164_tvnorms[] = {
27 	{
28 		.name      = "NTSC-M",
29 		.id        = V4L2_STD_NTSC_M,
30 	}, {
31 		.name      = "NTSC-JP",
32 		.id        = V4L2_STD_NTSC_M_JP,
33 	}
34 };
35 
36 /* Take the encoder configuration form the port struct and
37  * flush it to the hardware.
38  */
39 static void saa7164_encoder_configure(struct saa7164_port *port)
40 {
41 	struct saa7164_dev *dev = port->dev;
42 	dprintk(DBGLVL_ENC, "%s()\n", __func__);
43 
44 	port->encoder_params.width = port->width;
45 	port->encoder_params.height = port->height;
46 	port->encoder_params.is_50hz =
47 		(port->encodernorm.id & V4L2_STD_625_50) != 0;
48 
49 	/* Set up the DIF (enable it) for analog mode by default */
50 	saa7164_api_initialize_dif(port);
51 
52 	/* Configure the correct video standard */
53 	saa7164_api_configure_dif(port, port->encodernorm.id);
54 
55 	/* Ensure the audio decoder is correct configured */
56 	saa7164_api_set_audio_std(port);
57 }
58 
59 static int saa7164_encoder_buffers_dealloc(struct saa7164_port *port)
60 {
61 	struct list_head *c, *n, *p, *q, *l, *v;
62 	struct saa7164_dev *dev = port->dev;
63 	struct saa7164_buffer *buf;
64 	struct saa7164_user_buffer *ubuf;
65 
66 	/* Remove any allocated buffers */
67 	mutex_lock(&port->dmaqueue_lock);
68 
69 	dprintk(DBGLVL_ENC, "%s(port=%d) dmaqueue\n", __func__, port->nr);
70 	list_for_each_safe(c, n, &port->dmaqueue.list) {
71 		buf = list_entry(c, struct saa7164_buffer, list);
72 		list_del(c);
73 		saa7164_buffer_dealloc(buf);
74 	}
75 
76 	dprintk(DBGLVL_ENC, "%s(port=%d) used\n", __func__, port->nr);
77 	list_for_each_safe(p, q, &port->list_buf_used.list) {
78 		ubuf = list_entry(p, struct saa7164_user_buffer, list);
79 		list_del(p);
80 		saa7164_buffer_dealloc_user(ubuf);
81 	}
82 
83 	dprintk(DBGLVL_ENC, "%s(port=%d) free\n", __func__, port->nr);
84 	list_for_each_safe(l, v, &port->list_buf_free.list) {
85 		ubuf = list_entry(l, struct saa7164_user_buffer, list);
86 		list_del(l);
87 		saa7164_buffer_dealloc_user(ubuf);
88 	}
89 
90 	mutex_unlock(&port->dmaqueue_lock);
91 	dprintk(DBGLVL_ENC, "%s(port=%d) done\n", __func__, port->nr);
92 
93 	return 0;
94 }
95 
96 /* Dynamic buffer switch at encoder start time */
97 static int saa7164_encoder_buffers_alloc(struct saa7164_port *port)
98 {
99 	struct saa7164_dev *dev = port->dev;
100 	struct saa7164_buffer *buf;
101 	struct saa7164_user_buffer *ubuf;
102 	struct tmHWStreamParameters *params = &port->hw_streamingparams;
103 	int result = -ENODEV, i;
104 	int len = 0;
105 
106 	dprintk(DBGLVL_ENC, "%s()\n", __func__);
107 
108 	if (port->encoder_params.stream_type ==
109 		V4L2_MPEG_STREAM_TYPE_MPEG2_PS) {
110 		dprintk(DBGLVL_ENC,
111 			"%s() type=V4L2_MPEG_STREAM_TYPE_MPEG2_PS\n",
112 			__func__);
113 		params->samplesperline = 128;
114 		params->numberoflines = 256;
115 		params->pitch = 128;
116 		params->numpagetables = 2 +
117 			((SAA7164_PS_NUMBER_OF_LINES * 128) / PAGE_SIZE);
118 	} else
119 	if (port->encoder_params.stream_type ==
120 		V4L2_MPEG_STREAM_TYPE_MPEG2_TS) {
121 		dprintk(DBGLVL_ENC,
122 			"%s() type=V4L2_MPEG_STREAM_TYPE_MPEG2_TS\n",
123 			__func__);
124 		params->samplesperline = 188;
125 		params->numberoflines = 312;
126 		params->pitch = 188;
127 		params->numpagetables = 2 +
128 			((SAA7164_TS_NUMBER_OF_LINES * 188) / PAGE_SIZE);
129 	} else
130 		BUG();
131 
132 	/* Init and establish defaults */
133 	params->bitspersample = 8;
134 	params->linethreshold = 0;
135 	params->pagetablelistvirt = NULL;
136 	params->pagetablelistphys = NULL;
137 	params->numpagetableentries = port->hwcfg.buffercount;
138 
139 	/* Allocate the PCI resources, buffers (hard) */
140 	for (i = 0; i < port->hwcfg.buffercount; i++) {
141 		buf = saa7164_buffer_alloc(port,
142 			params->numberoflines *
143 			params->pitch);
144 
145 		if (!buf) {
146 			printk(KERN_ERR "%s() failed (errno = %d), unable to allocate buffer\n",
147 				__func__, result);
148 			result = -ENOMEM;
149 			goto failed;
150 		} else {
151 
152 			mutex_lock(&port->dmaqueue_lock);
153 			list_add_tail(&buf->list, &port->dmaqueue.list);
154 			mutex_unlock(&port->dmaqueue_lock);
155 
156 		}
157 	}
158 
159 	/* Allocate some kernel buffers for copying
160 	 * to userpsace.
161 	 */
162 	len = params->numberoflines * params->pitch;
163 
164 	if (encoder_buffers < 16)
165 		encoder_buffers = 16;
166 	if (encoder_buffers > 512)
167 		encoder_buffers = 512;
168 
169 	for (i = 0; i < encoder_buffers; i++) {
170 
171 		ubuf = saa7164_buffer_alloc_user(dev, len);
172 		if (ubuf) {
173 			mutex_lock(&port->dmaqueue_lock);
174 			list_add_tail(&ubuf->list, &port->list_buf_free.list);
175 			mutex_unlock(&port->dmaqueue_lock);
176 		}
177 
178 	}
179 
180 	result = 0;
181 
182 failed:
183 	return result;
184 }
185 
186 static int saa7164_encoder_initialize(struct saa7164_port *port)
187 {
188 	saa7164_encoder_configure(port);
189 	return 0;
190 }
191 
192 /* -- V4L2 --------------------------------------------------------- */
193 int saa7164_s_std(struct saa7164_port *port, v4l2_std_id id)
194 {
195 	struct saa7164_dev *dev = port->dev;
196 	unsigned int i;
197 
198 	dprintk(DBGLVL_ENC, "%s(id=0x%x)\n", __func__, (u32)id);
199 
200 	for (i = 0; i < ARRAY_SIZE(saa7164_tvnorms); i++) {
201 		if (id & saa7164_tvnorms[i].id)
202 			break;
203 	}
204 	if (i == ARRAY_SIZE(saa7164_tvnorms))
205 		return -EINVAL;
206 
207 	port->encodernorm = saa7164_tvnorms[i];
208 	port->std = id;
209 
210 	/* Update the audio decoder while is not running in
211 	 * auto detect mode.
212 	 */
213 	saa7164_api_set_audio_std(port);
214 
215 	dprintk(DBGLVL_ENC, "%s(id=0x%x) OK\n", __func__, (u32)id);
216 
217 	return 0;
218 }
219 
220 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id id)
221 {
222 	struct saa7164_encoder_fh *fh = file->private_data;
223 
224 	return saa7164_s_std(fh->port, id);
225 }
226 
227 int saa7164_g_std(struct saa7164_port *port, v4l2_std_id *id)
228 {
229 	*id = port->std;
230 	return 0;
231 }
232 
233 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *id)
234 {
235 	struct saa7164_encoder_fh *fh = file->private_data;
236 
237 	return saa7164_g_std(fh->port, id);
238 }
239 
240 int saa7164_enum_input(struct file *file, void *priv, struct v4l2_input *i)
241 {
242 	static const char * const inputs[] = {
243 		"tuner", "composite", "svideo", "aux",
244 		"composite 2", "svideo 2", "aux 2"
245 	};
246 	int n;
247 
248 	if (i->index >= 7)
249 		return -EINVAL;
250 
251 	strscpy(i->name, inputs[i->index], sizeof(i->name));
252 
253 	if (i->index == 0)
254 		i->type = V4L2_INPUT_TYPE_TUNER;
255 	else
256 		i->type  = V4L2_INPUT_TYPE_CAMERA;
257 
258 	for (n = 0; n < ARRAY_SIZE(saa7164_tvnorms); n++)
259 		i->std |= saa7164_tvnorms[n].id;
260 
261 	return 0;
262 }
263 
264 int saa7164_g_input(struct saa7164_port *port, unsigned int *i)
265 {
266 	struct saa7164_dev *dev = port->dev;
267 
268 	if (saa7164_api_get_videomux(port) != SAA_OK)
269 		return -EIO;
270 
271 	*i = (port->mux_input - 1);
272 
273 	dprintk(DBGLVL_ENC, "%s() input=%d\n", __func__, *i);
274 
275 	return 0;
276 }
277 
278 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
279 {
280 	struct saa7164_encoder_fh *fh = file->private_data;
281 
282 	return saa7164_g_input(fh->port, i);
283 }
284 
285 int saa7164_s_input(struct saa7164_port *port, unsigned int i)
286 {
287 	struct saa7164_dev *dev = port->dev;
288 
289 	dprintk(DBGLVL_ENC, "%s() input=%d\n", __func__, i);
290 
291 	if (i >= 7)
292 		return -EINVAL;
293 
294 	port->mux_input = i + 1;
295 
296 	if (saa7164_api_set_videomux(port) != SAA_OK)
297 		return -EIO;
298 
299 	return 0;
300 }
301 
302 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
303 {
304 	struct saa7164_encoder_fh *fh = file->private_data;
305 
306 	return saa7164_s_input(fh->port, i);
307 }
308 
309 int saa7164_g_tuner(struct file *file, void *priv, struct v4l2_tuner *t)
310 {
311 	struct saa7164_encoder_fh *fh = file->private_data;
312 	struct saa7164_port *port = fh->port;
313 	struct saa7164_dev *dev = port->dev;
314 
315 	if (0 != t->index)
316 		return -EINVAL;
317 
318 	strscpy(t->name, "tuner", sizeof(t->name));
319 	t->capability = V4L2_TUNER_CAP_NORM | V4L2_TUNER_CAP_STEREO;
320 	t->rangelow = SAA7164_TV_MIN_FREQ;
321 	t->rangehigh = SAA7164_TV_MAX_FREQ;
322 
323 	dprintk(DBGLVL_ENC, "VIDIOC_G_TUNER: tuner type %d\n", t->type);
324 
325 	return 0;
326 }
327 
328 int saa7164_s_tuner(struct file *file, void *priv,
329 			   const struct v4l2_tuner *t)
330 {
331 	if (0 != t->index)
332 		return -EINVAL;
333 
334 	/* Update the A/V core */
335 	return 0;
336 }
337 
338 int saa7164_g_frequency(struct saa7164_port *port, struct v4l2_frequency *f)
339 {
340 	if (f->tuner)
341 		return -EINVAL;
342 
343 	f->frequency = port->freq;
344 	return 0;
345 }
346 
347 static int vidioc_g_frequency(struct file *file, void *priv,
348 	struct v4l2_frequency *f)
349 {
350 	struct saa7164_encoder_fh *fh = file->private_data;
351 
352 	return saa7164_g_frequency(fh->port, f);
353 }
354 
355 int saa7164_s_frequency(struct saa7164_port *port,
356 			const struct v4l2_frequency *f)
357 {
358 	struct saa7164_dev *dev = port->dev;
359 	struct saa7164_port *tsport;
360 	struct dvb_frontend *fe;
361 
362 	/* TODO: Pull this for the std */
363 	struct analog_parameters params = {
364 		.mode      = V4L2_TUNER_ANALOG_TV,
365 		.audmode   = V4L2_TUNER_MODE_STEREO,
366 		.std       = port->encodernorm.id,
367 		.frequency = f->frequency
368 	};
369 
370 	/* Stop the encoder */
371 	dprintk(DBGLVL_ENC, "%s() frequency=%d tuner=%d\n", __func__,
372 		f->frequency, f->tuner);
373 
374 	if (f->tuner != 0)
375 		return -EINVAL;
376 
377 	port->freq = clamp(f->frequency,
378 			   SAA7164_TV_MIN_FREQ, SAA7164_TV_MAX_FREQ);
379 
380 	/* Update the hardware */
381 	if (port->nr == SAA7164_PORT_ENC1)
382 		tsport = &dev->ports[SAA7164_PORT_TS1];
383 	else if (port->nr == SAA7164_PORT_ENC2)
384 		tsport = &dev->ports[SAA7164_PORT_TS2];
385 	else
386 		BUG();
387 
388 	fe = tsport->dvb.frontend;
389 
390 	if (fe && fe->ops.tuner_ops.set_analog_params)
391 		fe->ops.tuner_ops.set_analog_params(fe, &params);
392 	else
393 		printk(KERN_ERR "%s() No analog tuner, aborting\n", __func__);
394 
395 	saa7164_encoder_initialize(port);
396 
397 	return 0;
398 }
399 
400 static int vidioc_s_frequency(struct file *file, void *priv,
401 			      const struct v4l2_frequency *f)
402 {
403 	struct saa7164_encoder_fh *fh = file->private_data;
404 
405 	return saa7164_s_frequency(fh->port, f);
406 }
407 
408 static int saa7164_s_ctrl(struct v4l2_ctrl *ctrl)
409 {
410 	struct saa7164_port *port =
411 		container_of(ctrl->handler, struct saa7164_port, ctrl_handler);
412 	struct saa7164_encoder_params *params = &port->encoder_params;
413 	int ret = 0;
414 
415 	switch (ctrl->id) {
416 	case V4L2_CID_BRIGHTNESS:
417 		port->ctl_brightness = ctrl->val;
418 		saa7164_api_set_usercontrol(port, PU_BRIGHTNESS_CONTROL);
419 		break;
420 	case V4L2_CID_CONTRAST:
421 		port->ctl_contrast = ctrl->val;
422 		saa7164_api_set_usercontrol(port, PU_CONTRAST_CONTROL);
423 		break;
424 	case V4L2_CID_SATURATION:
425 		port->ctl_saturation = ctrl->val;
426 		saa7164_api_set_usercontrol(port, PU_SATURATION_CONTROL);
427 		break;
428 	case V4L2_CID_HUE:
429 		port->ctl_hue = ctrl->val;
430 		saa7164_api_set_usercontrol(port, PU_HUE_CONTROL);
431 		break;
432 	case V4L2_CID_SHARPNESS:
433 		port->ctl_sharpness = ctrl->val;
434 		saa7164_api_set_usercontrol(port, PU_SHARPNESS_CONTROL);
435 		break;
436 	case V4L2_CID_AUDIO_VOLUME:
437 		port->ctl_volume = ctrl->val;
438 		saa7164_api_set_audio_volume(port, port->ctl_volume);
439 		break;
440 	case V4L2_CID_MPEG_VIDEO_BITRATE:
441 		params->bitrate = ctrl->val;
442 		break;
443 	case V4L2_CID_MPEG_STREAM_TYPE:
444 		params->stream_type = ctrl->val;
445 		break;
446 	case V4L2_CID_MPEG_AUDIO_MUTE:
447 		params->ctl_mute = ctrl->val;
448 		ret = saa7164_api_audio_mute(port, params->ctl_mute);
449 		if (ret != SAA_OK) {
450 			printk(KERN_ERR "%s() error, ret = 0x%x\n", __func__,
451 				ret);
452 			ret = -EIO;
453 		}
454 		break;
455 	case V4L2_CID_MPEG_VIDEO_ASPECT:
456 		params->ctl_aspect = ctrl->val;
457 		ret = saa7164_api_set_aspect_ratio(port);
458 		if (ret != SAA_OK) {
459 			printk(KERN_ERR "%s() error, ret = 0x%x\n", __func__,
460 				ret);
461 			ret = -EIO;
462 		}
463 		break;
464 	case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
465 		params->bitrate_mode = ctrl->val;
466 		break;
467 	case V4L2_CID_MPEG_VIDEO_B_FRAMES:
468 		params->refdist = ctrl->val;
469 		break;
470 	case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK:
471 		params->bitrate_peak = ctrl->val;
472 		break;
473 	case V4L2_CID_MPEG_VIDEO_GOP_SIZE:
474 		params->gop_size = ctrl->val;
475 		break;
476 	default:
477 		ret = -EINVAL;
478 	}
479 
480 	return ret;
481 }
482 
483 static int vidioc_querycap(struct file *file, void  *priv,
484 	struct v4l2_capability *cap)
485 {
486 	struct saa7164_encoder_fh *fh = file->private_data;
487 	struct saa7164_port *port = fh->port;
488 	struct saa7164_dev *dev = port->dev;
489 
490 	strscpy(cap->driver, dev->name, sizeof(cap->driver));
491 	strscpy(cap->card, saa7164_boards[dev->board].name,
492 		sizeof(cap->card));
493 	sprintf(cap->bus_info, "PCI:%s", pci_name(dev->pci));
494 	cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
495 			    V4L2_CAP_TUNER | V4L2_CAP_VBI_CAPTURE |
496 			    V4L2_CAP_DEVICE_CAPS;
497 	return 0;
498 }
499 
500 static int vidioc_enum_fmt_vid_cap(struct file *file, void  *priv,
501 	struct v4l2_fmtdesc *f)
502 {
503 	if (f->index != 0)
504 		return -EINVAL;
505 
506 	f->pixelformat = V4L2_PIX_FMT_MPEG;
507 
508 	return 0;
509 }
510 
511 static int vidioc_fmt_vid_cap(struct file *file, void *priv,
512 				struct v4l2_format *f)
513 {
514 	struct saa7164_encoder_fh *fh = file->private_data;
515 	struct saa7164_port *port = fh->port;
516 
517 	f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
518 	f->fmt.pix.bytesperline = 0;
519 	f->fmt.pix.sizeimage    = SAA7164_SIZEIMAGE;
520 	f->fmt.pix.field        = V4L2_FIELD_INTERLACED;
521 	f->fmt.pix.colorspace   = V4L2_COLORSPACE_SMPTE170M;
522 	f->fmt.pix.width        = port->width;
523 	f->fmt.pix.height       = port->height;
524 	return 0;
525 }
526 
527 static int saa7164_encoder_stop_port(struct saa7164_port *port)
528 {
529 	struct saa7164_dev *dev = port->dev;
530 	int ret;
531 
532 	ret = saa7164_api_transition_port(port, SAA_DMASTATE_STOP);
533 	if ((ret != SAA_OK) && (ret != SAA_ERR_ALREADY_STOPPED)) {
534 		printk(KERN_ERR "%s() stop transition failed, ret = 0x%x\n",
535 			__func__, ret);
536 		ret = -EIO;
537 	} else {
538 		dprintk(DBGLVL_ENC, "%s()    Stopped\n", __func__);
539 		ret = 0;
540 	}
541 
542 	return ret;
543 }
544 
545 static int saa7164_encoder_acquire_port(struct saa7164_port *port)
546 {
547 	struct saa7164_dev *dev = port->dev;
548 	int ret;
549 
550 	ret = saa7164_api_transition_port(port, SAA_DMASTATE_ACQUIRE);
551 	if ((ret != SAA_OK) && (ret != SAA_ERR_ALREADY_STOPPED)) {
552 		printk(KERN_ERR "%s() acquire transition failed, ret = 0x%x\n",
553 			__func__, ret);
554 		ret = -EIO;
555 	} else {
556 		dprintk(DBGLVL_ENC, "%s() Acquired\n", __func__);
557 		ret = 0;
558 	}
559 
560 	return ret;
561 }
562 
563 static int saa7164_encoder_pause_port(struct saa7164_port *port)
564 {
565 	struct saa7164_dev *dev = port->dev;
566 	int ret;
567 
568 	ret = saa7164_api_transition_port(port, SAA_DMASTATE_PAUSE);
569 	if ((ret != SAA_OK) && (ret != SAA_ERR_ALREADY_STOPPED)) {
570 		printk(KERN_ERR "%s() pause transition failed, ret = 0x%x\n",
571 			__func__, ret);
572 		ret = -EIO;
573 	} else {
574 		dprintk(DBGLVL_ENC, "%s()   Paused\n", __func__);
575 		ret = 0;
576 	}
577 
578 	return ret;
579 }
580 
581 /* Firmware is very windows centric, meaning you have to transition
582  * the part through AVStream / KS Windows stages, forwards or backwards.
583  * States are: stopped, acquired (h/w), paused, started.
584  * We have to leave here will all of the soft buffers on the free list,
585  * else the cfg_post() func won't have soft buffers to correctly configure.
586  */
587 static int saa7164_encoder_stop_streaming(struct saa7164_port *port)
588 {
589 	struct saa7164_dev *dev = port->dev;
590 	struct saa7164_buffer *buf;
591 	struct saa7164_user_buffer *ubuf;
592 	struct list_head *c, *n;
593 	int ret;
594 
595 	dprintk(DBGLVL_ENC, "%s(port=%d)\n", __func__, port->nr);
596 
597 	ret = saa7164_encoder_pause_port(port);
598 	ret = saa7164_encoder_acquire_port(port);
599 	ret = saa7164_encoder_stop_port(port);
600 
601 	dprintk(DBGLVL_ENC, "%s(port=%d) Hardware stopped\n", __func__,
602 		port->nr);
603 
604 	/* Reset the state of any allocated buffer resources */
605 	mutex_lock(&port->dmaqueue_lock);
606 
607 	/* Reset the hard and soft buffer state */
608 	list_for_each_safe(c, n, &port->dmaqueue.list) {
609 		buf = list_entry(c, struct saa7164_buffer, list);
610 		buf->flags = SAA7164_BUFFER_FREE;
611 		buf->pos = 0;
612 	}
613 
614 	list_for_each_safe(c, n, &port->list_buf_used.list) {
615 		ubuf = list_entry(c, struct saa7164_user_buffer, list);
616 		ubuf->pos = 0;
617 		list_move_tail(&ubuf->list, &port->list_buf_free.list);
618 	}
619 
620 	mutex_unlock(&port->dmaqueue_lock);
621 
622 	/* Free any allocated resources */
623 	saa7164_encoder_buffers_dealloc(port);
624 
625 	dprintk(DBGLVL_ENC, "%s(port=%d) Released\n", __func__, port->nr);
626 
627 	return ret;
628 }
629 
630 static int saa7164_encoder_start_streaming(struct saa7164_port *port)
631 {
632 	struct saa7164_dev *dev = port->dev;
633 	int result, ret = 0;
634 
635 	dprintk(DBGLVL_ENC, "%s(port=%d)\n", __func__, port->nr);
636 
637 	port->done_first_interrupt = 0;
638 
639 	/* allocate all of the PCIe DMA buffer resources on the fly,
640 	 * allowing switching between TS and PS payloads without
641 	 * requiring a complete driver reload.
642 	 */
643 	saa7164_encoder_buffers_alloc(port);
644 
645 	/* Configure the encoder with any cache values */
646 	saa7164_api_set_encoder(port);
647 	saa7164_api_get_encoder(port);
648 
649 	/* Place the empty buffers on the hardware */
650 	saa7164_buffer_cfg_port(port);
651 
652 	/* Acquire the hardware */
653 	result = saa7164_api_transition_port(port, SAA_DMASTATE_ACQUIRE);
654 	if ((result != SAA_OK) && (result != SAA_ERR_ALREADY_STOPPED)) {
655 		printk(KERN_ERR "%s() acquire transition failed, res = 0x%x\n",
656 			__func__, result);
657 
658 		/* Stop the hardware, regardless */
659 		result = saa7164_api_transition_port(port, SAA_DMASTATE_STOP);
660 		if ((result != SAA_OK) && (result != SAA_ERR_ALREADY_STOPPED)) {
661 			printk(KERN_ERR "%s() acquire/forced stop transition failed, res = 0x%x\n",
662 			       __func__, result);
663 		}
664 		ret = -EIO;
665 		goto out;
666 	} else
667 		dprintk(DBGLVL_ENC, "%s()   Acquired\n", __func__);
668 
669 	/* Pause the hardware */
670 	result = saa7164_api_transition_port(port, SAA_DMASTATE_PAUSE);
671 	if ((result != SAA_OK) && (result != SAA_ERR_ALREADY_STOPPED)) {
672 		printk(KERN_ERR "%s() pause transition failed, res = 0x%x\n",
673 				__func__, result);
674 
675 		/* Stop the hardware, regardless */
676 		result = saa7164_api_transition_port(port, SAA_DMASTATE_STOP);
677 		if ((result != SAA_OK) && (result != SAA_ERR_ALREADY_STOPPED)) {
678 			printk(KERN_ERR "%s() pause/forced stop transition failed, res = 0x%x\n",
679 			       __func__, result);
680 		}
681 
682 		ret = -EIO;
683 		goto out;
684 	} else
685 		dprintk(DBGLVL_ENC, "%s()   Paused\n", __func__);
686 
687 	/* Start the hardware */
688 	result = saa7164_api_transition_port(port, SAA_DMASTATE_RUN);
689 	if ((result != SAA_OK) && (result != SAA_ERR_ALREADY_STOPPED)) {
690 		printk(KERN_ERR "%s() run transition failed, result = 0x%x\n",
691 				__func__, result);
692 
693 		/* Stop the hardware, regardless */
694 		result = saa7164_api_transition_port(port, SAA_DMASTATE_STOP);
695 		if ((result != SAA_OK) && (result != SAA_ERR_ALREADY_STOPPED)) {
696 			printk(KERN_ERR "%s() run/forced stop transition failed, res = 0x%x\n",
697 			       __func__, result);
698 		}
699 
700 		ret = -EIO;
701 	} else
702 		dprintk(DBGLVL_ENC, "%s()   Running\n", __func__);
703 
704 out:
705 	return ret;
706 }
707 
708 static int fops_open(struct file *file)
709 {
710 	struct saa7164_dev *dev;
711 	struct saa7164_port *port;
712 	struct saa7164_encoder_fh *fh;
713 
714 	port = (struct saa7164_port *)video_get_drvdata(video_devdata(file));
715 	if (!port)
716 		return -ENODEV;
717 
718 	dev = port->dev;
719 
720 	dprintk(DBGLVL_ENC, "%s()\n", __func__);
721 
722 	/* allocate + initialize per filehandle data */
723 	fh = kzalloc(sizeof(*fh), GFP_KERNEL);
724 	if (NULL == fh)
725 		return -ENOMEM;
726 
727 	fh->port = port;
728 	v4l2_fh_init(&fh->fh, video_devdata(file));
729 	v4l2_fh_add(&fh->fh);
730 	file->private_data = fh;
731 
732 	return 0;
733 }
734 
735 static int fops_release(struct file *file)
736 {
737 	struct saa7164_encoder_fh *fh = file->private_data;
738 	struct saa7164_port *port = fh->port;
739 	struct saa7164_dev *dev = port->dev;
740 
741 	dprintk(DBGLVL_ENC, "%s()\n", __func__);
742 
743 	/* Shut device down on last close */
744 	if (atomic_cmpxchg(&fh->v4l_reading, 1, 0) == 1) {
745 		if (atomic_dec_return(&port->v4l_reader_count) == 0) {
746 			/* stop mpeg capture then cancel buffers */
747 			saa7164_encoder_stop_streaming(port);
748 		}
749 	}
750 
751 	v4l2_fh_del(&fh->fh);
752 	v4l2_fh_exit(&fh->fh);
753 	kfree(fh);
754 
755 	return 0;
756 }
757 
758 static struct
759 saa7164_user_buffer *saa7164_enc_next_buf(struct saa7164_port *port)
760 {
761 	struct saa7164_user_buffer *ubuf = NULL;
762 	struct saa7164_dev *dev = port->dev;
763 	u32 crc;
764 
765 	mutex_lock(&port->dmaqueue_lock);
766 	if (!list_empty(&port->list_buf_used.list)) {
767 		ubuf = list_first_entry(&port->list_buf_used.list,
768 			struct saa7164_user_buffer, list);
769 
770 		if (crc_checking) {
771 			crc = crc32(0, ubuf->data, ubuf->actual_size);
772 			if (crc != ubuf->crc) {
773 				printk(KERN_ERR
774 		"%s() ubuf %p crc became invalid, was 0x%x became 0x%x\n",
775 					__func__,
776 					ubuf, ubuf->crc, crc);
777 			}
778 		}
779 
780 	}
781 	mutex_unlock(&port->dmaqueue_lock);
782 
783 	dprintk(DBGLVL_ENC, "%s() returns %p\n", __func__, ubuf);
784 
785 	return ubuf;
786 }
787 
788 static ssize_t fops_read(struct file *file, char __user *buffer,
789 	size_t count, loff_t *pos)
790 {
791 	struct saa7164_encoder_fh *fh = file->private_data;
792 	struct saa7164_port *port = fh->port;
793 	struct saa7164_user_buffer *ubuf = NULL;
794 	struct saa7164_dev *dev = port->dev;
795 	int ret = 0;
796 	int rem, cnt;
797 	u8 *p;
798 
799 	port->last_read_msecs_diff = port->last_read_msecs;
800 	port->last_read_msecs = jiffies_to_msecs(jiffies);
801 	port->last_read_msecs_diff = port->last_read_msecs -
802 		port->last_read_msecs_diff;
803 
804 	saa7164_histogram_update(&port->read_interval,
805 		port->last_read_msecs_diff);
806 
807 	if (*pos) {
808 		printk(KERN_ERR "%s() ESPIPE\n", __func__);
809 		return -ESPIPE;
810 	}
811 
812 	if (atomic_cmpxchg(&fh->v4l_reading, 0, 1) == 0) {
813 		if (atomic_inc_return(&port->v4l_reader_count) == 1) {
814 
815 			if (saa7164_encoder_initialize(port) < 0) {
816 				printk(KERN_ERR "%s() EINVAL\n", __func__);
817 				return -EINVAL;
818 			}
819 
820 			saa7164_encoder_start_streaming(port);
821 			msleep(200);
822 		}
823 	}
824 
825 	/* blocking wait for buffer */
826 	if ((file->f_flags & O_NONBLOCK) == 0) {
827 		if (wait_event_interruptible(port->wait_read,
828 			saa7164_enc_next_buf(port))) {
829 				printk(KERN_ERR "%s() ERESTARTSYS\n", __func__);
830 				return -ERESTARTSYS;
831 		}
832 	}
833 
834 	/* Pull the first buffer from the used list */
835 	ubuf = saa7164_enc_next_buf(port);
836 
837 	while ((count > 0) && ubuf) {
838 
839 		/* set remaining bytes to copy */
840 		rem = ubuf->actual_size - ubuf->pos;
841 		cnt = rem > count ? count : rem;
842 
843 		p = ubuf->data + ubuf->pos;
844 
845 		dprintk(DBGLVL_ENC,
846 			"%s() count=%d cnt=%d rem=%d buf=%p buf->pos=%d\n",
847 			__func__, (int)count, cnt, rem, ubuf, ubuf->pos);
848 
849 		if (copy_to_user(buffer, p, cnt)) {
850 			printk(KERN_ERR "%s() copy_to_user failed\n", __func__);
851 			if (!ret) {
852 				printk(KERN_ERR "%s() EFAULT\n", __func__);
853 				ret = -EFAULT;
854 			}
855 			goto err;
856 		}
857 
858 		ubuf->pos += cnt;
859 		count -= cnt;
860 		buffer += cnt;
861 		ret += cnt;
862 
863 		if (ubuf->pos > ubuf->actual_size)
864 			printk(KERN_ERR "read() pos > actual, huh?\n");
865 
866 		if (ubuf->pos == ubuf->actual_size) {
867 
868 			/* finished with current buffer, take next buffer */
869 
870 			/* Requeue the buffer on the free list */
871 			ubuf->pos = 0;
872 
873 			mutex_lock(&port->dmaqueue_lock);
874 			list_move_tail(&ubuf->list, &port->list_buf_free.list);
875 			mutex_unlock(&port->dmaqueue_lock);
876 
877 			/* Dequeue next */
878 			if ((file->f_flags & O_NONBLOCK) == 0) {
879 				if (wait_event_interruptible(port->wait_read,
880 					saa7164_enc_next_buf(port))) {
881 						break;
882 				}
883 			}
884 			ubuf = saa7164_enc_next_buf(port);
885 		}
886 	}
887 err:
888 	if (!ret && !ubuf)
889 		ret = -EAGAIN;
890 
891 	return ret;
892 }
893 
894 static __poll_t fops_poll(struct file *file, poll_table *wait)
895 {
896 	__poll_t req_events = poll_requested_events(wait);
897 	struct saa7164_encoder_fh *fh =
898 		(struct saa7164_encoder_fh *)file->private_data;
899 	struct saa7164_port *port = fh->port;
900 	__poll_t mask = v4l2_ctrl_poll(file, wait);
901 
902 	port->last_poll_msecs_diff = port->last_poll_msecs;
903 	port->last_poll_msecs = jiffies_to_msecs(jiffies);
904 	port->last_poll_msecs_diff = port->last_poll_msecs -
905 		port->last_poll_msecs_diff;
906 
907 	saa7164_histogram_update(&port->poll_interval,
908 		port->last_poll_msecs_diff);
909 
910 	if (!(req_events & (EPOLLIN | EPOLLRDNORM)))
911 		return mask;
912 
913 	if (atomic_cmpxchg(&fh->v4l_reading, 0, 1) == 0) {
914 		if (atomic_inc_return(&port->v4l_reader_count) == 1) {
915 			if (saa7164_encoder_initialize(port) < 0)
916 				return mask | EPOLLERR;
917 			saa7164_encoder_start_streaming(port);
918 			msleep(200);
919 		}
920 	}
921 
922 	/* Pull the first buffer from the used list */
923 	if (!list_empty(&port->list_buf_used.list))
924 		mask |= EPOLLIN | EPOLLRDNORM;
925 
926 	return mask;
927 }
928 
929 static const struct v4l2_ctrl_ops saa7164_ctrl_ops = {
930 	.s_ctrl = saa7164_s_ctrl,
931 };
932 
933 static const struct v4l2_file_operations mpeg_fops = {
934 	.owner		= THIS_MODULE,
935 	.open		= fops_open,
936 	.release	= fops_release,
937 	.read		= fops_read,
938 	.poll		= fops_poll,
939 	.unlocked_ioctl	= video_ioctl2,
940 };
941 
942 static const struct v4l2_ioctl_ops mpeg_ioctl_ops = {
943 	.vidioc_s_std		 = vidioc_s_std,
944 	.vidioc_g_std		 = vidioc_g_std,
945 	.vidioc_enum_input	 = saa7164_enum_input,
946 	.vidioc_g_input		 = vidioc_g_input,
947 	.vidioc_s_input		 = vidioc_s_input,
948 	.vidioc_g_tuner		 = saa7164_g_tuner,
949 	.vidioc_s_tuner		 = saa7164_s_tuner,
950 	.vidioc_g_frequency	 = vidioc_g_frequency,
951 	.vidioc_s_frequency	 = vidioc_s_frequency,
952 	.vidioc_querycap	 = vidioc_querycap,
953 	.vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
954 	.vidioc_g_fmt_vid_cap	 = vidioc_fmt_vid_cap,
955 	.vidioc_try_fmt_vid_cap	 = vidioc_fmt_vid_cap,
956 	.vidioc_s_fmt_vid_cap	 = vidioc_fmt_vid_cap,
957 	.vidioc_log_status	 = v4l2_ctrl_log_status,
958 	.vidioc_subscribe_event  = v4l2_ctrl_subscribe_event,
959 	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
960 };
961 
962 static struct video_device saa7164_mpeg_template = {
963 	.name          = "saa7164",
964 	.fops          = &mpeg_fops,
965 	.ioctl_ops     = &mpeg_ioctl_ops,
966 	.minor         = -1,
967 	.tvnorms       = SAA7164_NORMS,
968 	.device_caps   = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
969 			 V4L2_CAP_TUNER,
970 };
971 
972 static struct video_device *saa7164_encoder_alloc(
973 	struct saa7164_port *port,
974 	struct pci_dev *pci,
975 	struct video_device *template,
976 	char *type)
977 {
978 	struct video_device *vfd;
979 	struct saa7164_dev *dev = port->dev;
980 
981 	dprintk(DBGLVL_ENC, "%s()\n", __func__);
982 
983 	vfd = video_device_alloc();
984 	if (NULL == vfd)
985 		return NULL;
986 
987 	*vfd = *template;
988 	snprintf(vfd->name, sizeof(vfd->name), "%s %s (%s)", dev->name,
989 		type, saa7164_boards[dev->board].name);
990 
991 	vfd->v4l2_dev  = &dev->v4l2_dev;
992 	vfd->release = video_device_release;
993 	return vfd;
994 }
995 
996 int saa7164_encoder_register(struct saa7164_port *port)
997 {
998 	struct saa7164_dev *dev = port->dev;
999 	struct v4l2_ctrl_handler *hdl = &port->ctrl_handler;
1000 	int result = -ENODEV;
1001 
1002 	dprintk(DBGLVL_ENC, "%s()\n", __func__);
1003 
1004 	BUG_ON(port->type != SAA7164_MPEG_ENCODER);
1005 
1006 	/* Sanity check that the PCI configuration space is active */
1007 	if (port->hwcfg.BARLocation == 0) {
1008 		printk(KERN_ERR "%s() failed (errno = %d), NO PCI configuration\n",
1009 			__func__, result);
1010 		result = -ENOMEM;
1011 		goto fail_pci;
1012 	}
1013 
1014 	/* Establish encoder defaults here */
1015 	/* Set default TV standard */
1016 	port->encodernorm = saa7164_tvnorms[0];
1017 	port->width = 720;
1018 	port->mux_input = 1; /* Composite */
1019 	port->video_format = EU_VIDEO_FORMAT_MPEG_2;
1020 	port->audio_format = 0;
1021 	port->video_resolution = 0;
1022 	port->freq = SAA7164_TV_MIN_FREQ;
1023 
1024 	v4l2_ctrl_handler_init(hdl, 14);
1025 	v4l2_ctrl_new_std(hdl, &saa7164_ctrl_ops,
1026 			  V4L2_CID_BRIGHTNESS, 0, 255, 1, 127);
1027 	v4l2_ctrl_new_std(hdl, &saa7164_ctrl_ops,
1028 			  V4L2_CID_CONTRAST, 0, 255, 1, 66);
1029 	v4l2_ctrl_new_std(hdl, &saa7164_ctrl_ops,
1030 			  V4L2_CID_SATURATION, 0, 255, 1, 62);
1031 	v4l2_ctrl_new_std(hdl, &saa7164_ctrl_ops,
1032 			  V4L2_CID_HUE, 0, 255, 1, 128);
1033 	v4l2_ctrl_new_std(hdl, &saa7164_ctrl_ops,
1034 			  V4L2_CID_SHARPNESS, 0x0, 0x0f, 1, 8);
1035 	v4l2_ctrl_new_std(hdl, &saa7164_ctrl_ops,
1036 			  V4L2_CID_MPEG_AUDIO_MUTE, 0x0, 0x01, 1, 0);
1037 	v4l2_ctrl_new_std(hdl, &saa7164_ctrl_ops,
1038 			  V4L2_CID_AUDIO_VOLUME, -83, 24, 1, 20);
1039 	v4l2_ctrl_new_std(hdl, &saa7164_ctrl_ops,
1040 			  V4L2_CID_MPEG_VIDEO_BITRATE,
1041 			  ENCODER_MIN_BITRATE, ENCODER_MAX_BITRATE,
1042 			  100000, ENCODER_DEF_BITRATE);
1043 	v4l2_ctrl_new_std_menu(hdl, &saa7164_ctrl_ops,
1044 			       V4L2_CID_MPEG_STREAM_TYPE,
1045 			       V4L2_MPEG_STREAM_TYPE_MPEG2_TS, 0,
1046 			       V4L2_MPEG_STREAM_TYPE_MPEG2_PS);
1047 	v4l2_ctrl_new_std_menu(hdl, &saa7164_ctrl_ops,
1048 			       V4L2_CID_MPEG_VIDEO_ASPECT,
1049 			       V4L2_MPEG_VIDEO_ASPECT_221x100, 0,
1050 			       V4L2_MPEG_VIDEO_ASPECT_4x3);
1051 	v4l2_ctrl_new_std(hdl, &saa7164_ctrl_ops,
1052 			  V4L2_CID_MPEG_VIDEO_GOP_SIZE, 1, 255, 1, 15);
1053 	v4l2_ctrl_new_std_menu(hdl, &saa7164_ctrl_ops,
1054 			       V4L2_CID_MPEG_VIDEO_BITRATE_MODE,
1055 			       V4L2_MPEG_VIDEO_BITRATE_MODE_CBR, 0,
1056 			       V4L2_MPEG_VIDEO_BITRATE_MODE_VBR);
1057 	v4l2_ctrl_new_std(hdl, &saa7164_ctrl_ops,
1058 			  V4L2_CID_MPEG_VIDEO_B_FRAMES, 1, 3, 1, 1);
1059 	v4l2_ctrl_new_std(hdl, &saa7164_ctrl_ops,
1060 			  V4L2_CID_MPEG_VIDEO_BITRATE_PEAK,
1061 			  ENCODER_MIN_BITRATE, ENCODER_MAX_BITRATE,
1062 			  100000, ENCODER_DEF_BITRATE);
1063 	if (hdl->error) {
1064 		result = hdl->error;
1065 		goto fail_hdl;
1066 	}
1067 
1068 	port->std = V4L2_STD_NTSC_M;
1069 
1070 	if (port->encodernorm.id & V4L2_STD_525_60)
1071 		port->height = 480;
1072 	else
1073 		port->height = 576;
1074 
1075 	/* Allocate and register the video device node */
1076 	port->v4l_device = saa7164_encoder_alloc(port,
1077 		dev->pci, &saa7164_mpeg_template, "mpeg");
1078 
1079 	if (!port->v4l_device) {
1080 		printk(KERN_INFO "%s: can't allocate mpeg device\n",
1081 			dev->name);
1082 		result = -ENOMEM;
1083 		goto fail_hdl;
1084 	}
1085 
1086 	port->v4l_device->ctrl_handler = hdl;
1087 	v4l2_ctrl_handler_setup(hdl);
1088 	video_set_drvdata(port->v4l_device, port);
1089 	result = video_register_device(port->v4l_device,
1090 		VFL_TYPE_VIDEO, -1);
1091 	if (result < 0) {
1092 		printk(KERN_INFO "%s: can't register mpeg device\n",
1093 			dev->name);
1094 		goto fail_reg;
1095 	}
1096 
1097 	printk(KERN_INFO "%s: registered device video%d [mpeg]\n",
1098 		dev->name, port->v4l_device->num);
1099 
1100 	/* Configure the hardware defaults */
1101 	saa7164_api_set_videomux(port);
1102 	saa7164_api_set_usercontrol(port, PU_BRIGHTNESS_CONTROL);
1103 	saa7164_api_set_usercontrol(port, PU_CONTRAST_CONTROL);
1104 	saa7164_api_set_usercontrol(port, PU_HUE_CONTROL);
1105 	saa7164_api_set_usercontrol(port, PU_SATURATION_CONTROL);
1106 	saa7164_api_set_usercontrol(port, PU_SHARPNESS_CONTROL);
1107 	saa7164_api_audio_mute(port, 0);
1108 	saa7164_api_set_audio_volume(port, 20);
1109 	saa7164_api_set_aspect_ratio(port);
1110 
1111 	/* Disable audio standard detection, it's buggy */
1112 	saa7164_api_set_audio_detection(port, 0);
1113 
1114 	saa7164_api_set_encoder(port);
1115 	saa7164_api_get_encoder(port);
1116 	return 0;
1117 
1118 fail_reg:
1119 	video_device_release(port->v4l_device);
1120 	port->v4l_device = NULL;
1121 fail_hdl:
1122 	v4l2_ctrl_handler_free(hdl);
1123 fail_pci:
1124 	return result;
1125 }
1126 
1127 void saa7164_encoder_unregister(struct saa7164_port *port)
1128 {
1129 	struct saa7164_dev *dev = port->dev;
1130 
1131 	dprintk(DBGLVL_ENC, "%s(port=%d)\n", __func__, port->nr);
1132 
1133 	BUG_ON(port->type != SAA7164_MPEG_ENCODER);
1134 
1135 	if (port->v4l_device) {
1136 		if (port->v4l_device->minor != -1)
1137 			video_unregister_device(port->v4l_device);
1138 		else
1139 			video_device_release(port->v4l_device);
1140 
1141 		port->v4l_device = NULL;
1142 	}
1143 	v4l2_ctrl_handler_free(&port->ctrl_handler);
1144 
1145 	dprintk(DBGLVL_ENC, "%s(port=%d) done\n", __func__, port->nr);
1146 }
1147 
1148