1 /*
2  * Auvitek AU0828 USB Bridge (Analog video support)
3  *
4  * Copyright (C) 2009 Devin Heitmueller <dheitmueller@linuxtv.org>
5  * Copyright (C) 2005-2008 Auvitek International, Ltd.
6  *
7  * This program is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU General Public License
9  * As published by the Free Software Foundation; either version 2
10  * of the License, or (at your option) any later version.
11  *
12  * This program is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  * GNU General Public License for more details.
16  */
17 
18 /* Developer Notes:
19  *
20  * The hardware scaler supported is unimplemented
21  * AC97 audio support is unimplemented (only i2s audio mode)
22  *
23  */
24 
25 #include "au0828.h"
26 #include "au8522.h"
27 
28 #include <linux/module.h>
29 #include <linux/slab.h>
30 #include <linux/init.h>
31 #include <linux/device.h>
32 #include <media/v4l2-common.h>
33 #include <media/v4l2-mc.h>
34 #include <media/v4l2-ioctl.h>
35 #include <media/v4l2-event.h>
36 #include <media/tuner.h>
37 #include "au0828-reg.h"
38 
39 static DEFINE_MUTEX(au0828_sysfs_lock);
40 
41 /* ------------------------------------------------------------------
42 	Videobuf operations
43    ------------------------------------------------------------------*/
44 
45 static unsigned int isoc_debug;
46 module_param(isoc_debug, int, 0644);
47 MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
48 
49 #define au0828_isocdbg(fmt, arg...) \
50 do {\
51 	if (isoc_debug) { \
52 		pr_info("au0828 %s :"fmt, \
53 		       __func__ , ##arg);	   \
54 	} \
55   } while (0)
56 
57 static inline void i2c_gate_ctrl(struct au0828_dev *dev, int val)
58 {
59 	if (dev->dvb.frontend && dev->dvb.frontend->ops.analog_ops.i2c_gate_ctrl)
60 		dev->dvb.frontend->ops.analog_ops.i2c_gate_ctrl(dev->dvb.frontend, val);
61 }
62 
63 static inline void print_err_status(struct au0828_dev *dev,
64 				    int packet, int status)
65 {
66 	char *errmsg = "Unknown";
67 
68 	switch (status) {
69 	case -ENOENT:
70 		errmsg = "unlinked synchronously";
71 		break;
72 	case -ECONNRESET:
73 		errmsg = "unlinked asynchronously";
74 		break;
75 	case -ENOSR:
76 		errmsg = "Buffer error (overrun)";
77 		break;
78 	case -EPIPE:
79 		errmsg = "Stalled (device not responding)";
80 		break;
81 	case -EOVERFLOW:
82 		errmsg = "Babble (bad cable?)";
83 		break;
84 	case -EPROTO:
85 		errmsg = "Bit-stuff error (bad cable?)";
86 		break;
87 	case -EILSEQ:
88 		errmsg = "CRC/Timeout (could be anything)";
89 		break;
90 	case -ETIME:
91 		errmsg = "Device does not respond";
92 		break;
93 	}
94 	if (packet < 0) {
95 		au0828_isocdbg("URB status %d [%s].\n",	status, errmsg);
96 	} else {
97 		au0828_isocdbg("URB packet %d, status %d [%s].\n",
98 			       packet, status, errmsg);
99 	}
100 }
101 
102 static int check_dev(struct au0828_dev *dev)
103 {
104 	if (test_bit(DEV_DISCONNECTED, &dev->dev_state)) {
105 		pr_info("v4l2 ioctl: device not present\n");
106 		return -ENODEV;
107 	}
108 
109 	if (test_bit(DEV_MISCONFIGURED, &dev->dev_state)) {
110 		pr_info("v4l2 ioctl: device is misconfigured; close and open it again\n");
111 		return -EIO;
112 	}
113 	return 0;
114 }
115 
116 /*
117  * IRQ callback, called by URB callback
118  */
119 static void au0828_irq_callback(struct urb *urb)
120 {
121 	struct au0828_dmaqueue  *dma_q = urb->context;
122 	struct au0828_dev *dev = container_of(dma_q, struct au0828_dev, vidq);
123 	unsigned long flags = 0;
124 	int i;
125 
126 	switch (urb->status) {
127 	case 0:             /* success */
128 	case -ETIMEDOUT:    /* NAK */
129 		break;
130 	case -ECONNRESET:   /* kill */
131 	case -ENOENT:
132 	case -ESHUTDOWN:
133 		au0828_isocdbg("au0828_irq_callback called: status kill\n");
134 		return;
135 	default:            /* unknown error */
136 		au0828_isocdbg("urb completion error %d.\n", urb->status);
137 		break;
138 	}
139 
140 	/* Copy data from URB */
141 	spin_lock_irqsave(&dev->slock, flags);
142 	dev->isoc_ctl.isoc_copy(dev, urb);
143 	spin_unlock_irqrestore(&dev->slock, flags);
144 
145 	/* Reset urb buffers */
146 	for (i = 0; i < urb->number_of_packets; i++) {
147 		urb->iso_frame_desc[i].status = 0;
148 		urb->iso_frame_desc[i].actual_length = 0;
149 	}
150 	urb->status = 0;
151 
152 	urb->status = usb_submit_urb(urb, GFP_ATOMIC);
153 	if (urb->status) {
154 		au0828_isocdbg("urb resubmit failed (error=%i)\n",
155 			       urb->status);
156 	}
157 	dev->stream_state = STREAM_ON;
158 }
159 
160 /*
161  * Stop and Deallocate URBs
162  */
163 static void au0828_uninit_isoc(struct au0828_dev *dev)
164 {
165 	struct urb *urb;
166 	int i;
167 
168 	au0828_isocdbg("au0828: called au0828_uninit_isoc\n");
169 
170 	dev->isoc_ctl.nfields = -1;
171 	for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
172 		urb = dev->isoc_ctl.urb[i];
173 		if (urb) {
174 			if (!irqs_disabled())
175 				usb_kill_urb(urb);
176 			else
177 				usb_unlink_urb(urb);
178 
179 			if (dev->isoc_ctl.transfer_buffer[i]) {
180 				usb_free_coherent(dev->usbdev,
181 					urb->transfer_buffer_length,
182 					dev->isoc_ctl.transfer_buffer[i],
183 					urb->transfer_dma);
184 			}
185 			usb_free_urb(urb);
186 			dev->isoc_ctl.urb[i] = NULL;
187 		}
188 		dev->isoc_ctl.transfer_buffer[i] = NULL;
189 	}
190 
191 	kfree(dev->isoc_ctl.urb);
192 	kfree(dev->isoc_ctl.transfer_buffer);
193 
194 	dev->isoc_ctl.urb = NULL;
195 	dev->isoc_ctl.transfer_buffer = NULL;
196 	dev->isoc_ctl.num_bufs = 0;
197 
198 	dev->stream_state = STREAM_OFF;
199 }
200 
201 /*
202  * Allocate URBs and start IRQ
203  */
204 static int au0828_init_isoc(struct au0828_dev *dev, int max_packets,
205 			    int num_bufs, int max_pkt_size,
206 			    int (*isoc_copy) (struct au0828_dev *dev, struct urb *urb))
207 {
208 	struct au0828_dmaqueue *dma_q = &dev->vidq;
209 	int i;
210 	int sb_size, pipe;
211 	struct urb *urb;
212 	int j, k;
213 	int rc;
214 
215 	au0828_isocdbg("au0828: called au0828_prepare_isoc\n");
216 
217 	dev->isoc_ctl.isoc_copy = isoc_copy;
218 	dev->isoc_ctl.num_bufs = num_bufs;
219 
220 	dev->isoc_ctl.urb = kcalloc(num_bufs, sizeof(void *),  GFP_KERNEL);
221 	if (!dev->isoc_ctl.urb) {
222 		au0828_isocdbg("cannot alloc memory for usb buffers\n");
223 		return -ENOMEM;
224 	}
225 
226 	dev->isoc_ctl.transfer_buffer = kcalloc(num_bufs, sizeof(void *),
227 						GFP_KERNEL);
228 	if (!dev->isoc_ctl.transfer_buffer) {
229 		au0828_isocdbg("cannot allocate memory for usb transfer\n");
230 		kfree(dev->isoc_ctl.urb);
231 		return -ENOMEM;
232 	}
233 
234 	dev->isoc_ctl.max_pkt_size = max_pkt_size;
235 	dev->isoc_ctl.buf = NULL;
236 
237 	sb_size = max_packets * dev->isoc_ctl.max_pkt_size;
238 
239 	/* allocate urbs and transfer buffers */
240 	for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
241 		urb = usb_alloc_urb(max_packets, GFP_KERNEL);
242 		if (!urb) {
243 			au0828_uninit_isoc(dev);
244 			return -ENOMEM;
245 		}
246 		dev->isoc_ctl.urb[i] = urb;
247 
248 		dev->isoc_ctl.transfer_buffer[i] = usb_alloc_coherent(dev->usbdev,
249 			sb_size, GFP_KERNEL, &urb->transfer_dma);
250 		if (!dev->isoc_ctl.transfer_buffer[i]) {
251 			printk("unable to allocate %i bytes for transfer buffer %i%s\n",
252 					sb_size, i,
253 					in_interrupt() ? " while in int" : "");
254 			au0828_uninit_isoc(dev);
255 			return -ENOMEM;
256 		}
257 		memset(dev->isoc_ctl.transfer_buffer[i], 0, sb_size);
258 
259 		pipe = usb_rcvisocpipe(dev->usbdev,
260 				       dev->isoc_in_endpointaddr),
261 
262 		usb_fill_int_urb(urb, dev->usbdev, pipe,
263 				 dev->isoc_ctl.transfer_buffer[i], sb_size,
264 				 au0828_irq_callback, dma_q, 1);
265 
266 		urb->number_of_packets = max_packets;
267 		urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
268 
269 		k = 0;
270 		for (j = 0; j < max_packets; j++) {
271 			urb->iso_frame_desc[j].offset = k;
272 			urb->iso_frame_desc[j].length =
273 						dev->isoc_ctl.max_pkt_size;
274 			k += dev->isoc_ctl.max_pkt_size;
275 		}
276 	}
277 
278 	/* submit urbs and enables IRQ */
279 	for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
280 		rc = usb_submit_urb(dev->isoc_ctl.urb[i], GFP_ATOMIC);
281 		if (rc) {
282 			au0828_isocdbg("submit of urb %i failed (error=%i)\n",
283 				       i, rc);
284 			au0828_uninit_isoc(dev);
285 			return rc;
286 		}
287 	}
288 
289 	return 0;
290 }
291 
292 /*
293  * Announces that a buffer were filled and request the next
294  */
295 static inline void buffer_filled(struct au0828_dev *dev,
296 				 struct au0828_dmaqueue *dma_q,
297 				 struct au0828_buffer *buf)
298 {
299 	struct vb2_v4l2_buffer *vb = &buf->vb;
300 	struct vb2_queue *q = vb->vb2_buf.vb2_queue;
301 
302 	/* Advice that buffer was filled */
303 	au0828_isocdbg("[%p/%d] wakeup\n", buf, buf->top_field);
304 
305 	if (q->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
306 		vb->sequence = dev->frame_count++;
307 	else
308 		vb->sequence = dev->vbi_frame_count++;
309 
310 	vb->field = V4L2_FIELD_INTERLACED;
311 	vb->vb2_buf.timestamp = ktime_get_ns();
312 	vb2_buffer_done(&vb->vb2_buf, VB2_BUF_STATE_DONE);
313 }
314 
315 /*
316  * Identify the buffer header type and properly handles
317  */
318 static void au0828_copy_video(struct au0828_dev *dev,
319 			      struct au0828_dmaqueue  *dma_q,
320 			      struct au0828_buffer *buf,
321 			      unsigned char *p,
322 			      unsigned char *outp, unsigned long len)
323 {
324 	void *fieldstart, *startwrite, *startread;
325 	int  linesdone, currlinedone, offset, lencopy, remain;
326 	int bytesperline = dev->width << 1; /* Assumes 16-bit depth @@@@ */
327 
328 	if (len == 0)
329 		return;
330 
331 	if (dma_q->pos + len > buf->length)
332 		len = buf->length - dma_q->pos;
333 
334 	startread = p;
335 	remain = len;
336 
337 	/* Interlaces frame */
338 	if (buf->top_field)
339 		fieldstart = outp;
340 	else
341 		fieldstart = outp + bytesperline;
342 
343 	linesdone = dma_q->pos / bytesperline;
344 	currlinedone = dma_q->pos % bytesperline;
345 	offset = linesdone * bytesperline * 2 + currlinedone;
346 	startwrite = fieldstart + offset;
347 	lencopy = bytesperline - currlinedone;
348 	lencopy = lencopy > remain ? remain : lencopy;
349 
350 	if ((char *)startwrite + lencopy > (char *)outp + buf->length) {
351 		au0828_isocdbg("Overflow of %zi bytes past buffer end (1)\n",
352 			       ((char *)startwrite + lencopy) -
353 			       ((char *)outp + buf->length));
354 		remain = (char *)outp + buf->length - (char *)startwrite;
355 		lencopy = remain;
356 	}
357 	if (lencopy <= 0)
358 		return;
359 	memcpy(startwrite, startread, lencopy);
360 
361 	remain -= lencopy;
362 
363 	while (remain > 0) {
364 		startwrite += lencopy + bytesperline;
365 		startread += lencopy;
366 		if (bytesperline > remain)
367 			lencopy = remain;
368 		else
369 			lencopy = bytesperline;
370 
371 		if ((char *)startwrite + lencopy > (char *)outp +
372 		    buf->length) {
373 			au0828_isocdbg("Overflow %zi bytes past buf end (2)\n",
374 				       ((char *)startwrite + lencopy) -
375 				       ((char *)outp + buf->length));
376 			lencopy = remain = (char *)outp + buf->length -
377 					   (char *)startwrite;
378 		}
379 		if (lencopy <= 0)
380 			break;
381 
382 		memcpy(startwrite, startread, lencopy);
383 
384 		remain -= lencopy;
385 	}
386 
387 	if (offset > 1440) {
388 		/* We have enough data to check for greenscreen */
389 		if (outp[0] < 0x60 && outp[1440] < 0x60)
390 			dev->greenscreen_detected = 1;
391 	}
392 
393 	dma_q->pos += len;
394 }
395 
396 /*
397  * video-buf generic routine to get the next available buffer
398  */
399 static inline void get_next_buf(struct au0828_dmaqueue *dma_q,
400 				struct au0828_buffer **buf)
401 {
402 	struct au0828_dev *dev = container_of(dma_q, struct au0828_dev, vidq);
403 
404 	if (list_empty(&dma_q->active)) {
405 		au0828_isocdbg("No active queue to serve\n");
406 		dev->isoc_ctl.buf = NULL;
407 		*buf = NULL;
408 		return;
409 	}
410 
411 	/* Get the next buffer */
412 	*buf = list_entry(dma_q->active.next, struct au0828_buffer, list);
413 	/* Cleans up buffer - Useful for testing for frame/URB loss */
414 	list_del(&(*buf)->list);
415 	dma_q->pos = 0;
416 	(*buf)->vb_buf = (*buf)->mem;
417 	dev->isoc_ctl.buf = *buf;
418 
419 	return;
420 }
421 
422 static void au0828_copy_vbi(struct au0828_dev *dev,
423 			      struct au0828_dmaqueue  *dma_q,
424 			      struct au0828_buffer *buf,
425 			      unsigned char *p,
426 			      unsigned char *outp, unsigned long len)
427 {
428 	unsigned char *startwrite, *startread;
429 	int bytesperline;
430 	int i, j = 0;
431 
432 	if (dev == NULL) {
433 		au0828_isocdbg("dev is null\n");
434 		return;
435 	}
436 
437 	if (dma_q == NULL) {
438 		au0828_isocdbg("dma_q is null\n");
439 		return;
440 	}
441 	if (buf == NULL)
442 		return;
443 	if (p == NULL) {
444 		au0828_isocdbg("p is null\n");
445 		return;
446 	}
447 	if (outp == NULL) {
448 		au0828_isocdbg("outp is null\n");
449 		return;
450 	}
451 
452 	bytesperline = dev->vbi_width;
453 
454 	if (dma_q->pos + len > buf->length)
455 		len = buf->length - dma_q->pos;
456 
457 	startread = p;
458 	startwrite = outp + (dma_q->pos / 2);
459 
460 	/* Make sure the bottom field populates the second half of the frame */
461 	if (buf->top_field == 0)
462 		startwrite += bytesperline * dev->vbi_height;
463 
464 	for (i = 0; i < len; i += 2)
465 		startwrite[j++] = startread[i+1];
466 
467 	dma_q->pos += len;
468 }
469 
470 
471 /*
472  * video-buf generic routine to get the next available VBI buffer
473  */
474 static inline void vbi_get_next_buf(struct au0828_dmaqueue *dma_q,
475 				    struct au0828_buffer **buf)
476 {
477 	struct au0828_dev *dev = container_of(dma_q, struct au0828_dev, vbiq);
478 
479 	if (list_empty(&dma_q->active)) {
480 		au0828_isocdbg("No active queue to serve\n");
481 		dev->isoc_ctl.vbi_buf = NULL;
482 		*buf = NULL;
483 		return;
484 	}
485 
486 	/* Get the next buffer */
487 	*buf = list_entry(dma_q->active.next, struct au0828_buffer, list);
488 	/* Cleans up buffer - Useful for testing for frame/URB loss */
489 	list_del(&(*buf)->list);
490 	dma_q->pos = 0;
491 	(*buf)->vb_buf = (*buf)->mem;
492 	dev->isoc_ctl.vbi_buf = *buf;
493 	return;
494 }
495 
496 /*
497  * Controls the isoc copy of each urb packet
498  */
499 static inline int au0828_isoc_copy(struct au0828_dev *dev, struct urb *urb)
500 {
501 	struct au0828_buffer    *buf;
502 	struct au0828_buffer    *vbi_buf;
503 	struct au0828_dmaqueue  *dma_q = urb->context;
504 	struct au0828_dmaqueue  *vbi_dma_q = &dev->vbiq;
505 	unsigned char *outp = NULL;
506 	unsigned char *vbioutp = NULL;
507 	int i, len = 0, rc = 1;
508 	unsigned char *p;
509 	unsigned char fbyte;
510 	unsigned int vbi_field_size;
511 	unsigned int remain, lencopy;
512 
513 	if (!dev)
514 		return 0;
515 
516 	if (test_bit(DEV_DISCONNECTED, &dev->dev_state) ||
517 	    test_bit(DEV_MISCONFIGURED, &dev->dev_state))
518 		return 0;
519 
520 	if (urb->status < 0) {
521 		print_err_status(dev, -1, urb->status);
522 		if (urb->status == -ENOENT)
523 			return 0;
524 	}
525 
526 	buf = dev->isoc_ctl.buf;
527 	if (buf != NULL)
528 		outp = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
529 
530 	vbi_buf = dev->isoc_ctl.vbi_buf;
531 	if (vbi_buf != NULL)
532 		vbioutp = vb2_plane_vaddr(&vbi_buf->vb.vb2_buf, 0);
533 
534 	for (i = 0; i < urb->number_of_packets; i++) {
535 		int status = urb->iso_frame_desc[i].status;
536 
537 		if (status < 0) {
538 			print_err_status(dev, i, status);
539 			if (urb->iso_frame_desc[i].status != -EPROTO)
540 				continue;
541 		}
542 
543 		if (urb->iso_frame_desc[i].actual_length <= 0)
544 			continue;
545 
546 		if (urb->iso_frame_desc[i].actual_length >
547 						dev->max_pkt_size) {
548 			au0828_isocdbg("packet bigger than packet size");
549 			continue;
550 		}
551 
552 		p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
553 		fbyte = p[0];
554 		len = urb->iso_frame_desc[i].actual_length - 4;
555 		p += 4;
556 
557 		if (fbyte & 0x80) {
558 			len -= 4;
559 			p += 4;
560 			au0828_isocdbg("Video frame %s\n",
561 				       (fbyte & 0x40) ? "odd" : "even");
562 			if (fbyte & 0x40) {
563 				/* VBI */
564 				if (vbi_buf != NULL)
565 					buffer_filled(dev, vbi_dma_q, vbi_buf);
566 				vbi_get_next_buf(vbi_dma_q, &vbi_buf);
567 				if (vbi_buf == NULL)
568 					vbioutp = NULL;
569 				else
570 					vbioutp = vb2_plane_vaddr(
571 						&vbi_buf->vb.vb2_buf, 0);
572 
573 				/* Video */
574 				if (buf != NULL)
575 					buffer_filled(dev, dma_q, buf);
576 				get_next_buf(dma_q, &buf);
577 				if (buf == NULL)
578 					outp = NULL;
579 				else
580 					outp = vb2_plane_vaddr(
581 						&buf->vb.vb2_buf, 0);
582 
583 				/* As long as isoc traffic is arriving, keep
584 				   resetting the timer */
585 				if (dev->vid_timeout_running)
586 					mod_timer(&dev->vid_timeout,
587 						  jiffies + (HZ / 10));
588 				if (dev->vbi_timeout_running)
589 					mod_timer(&dev->vbi_timeout,
590 						  jiffies + (HZ / 10));
591 			}
592 
593 			if (buf != NULL) {
594 				if (fbyte & 0x40)
595 					buf->top_field = 1;
596 				else
597 					buf->top_field = 0;
598 			}
599 
600 			if (vbi_buf != NULL) {
601 				if (fbyte & 0x40)
602 					vbi_buf->top_field = 1;
603 				else
604 					vbi_buf->top_field = 0;
605 			}
606 
607 			dev->vbi_read = 0;
608 			vbi_dma_q->pos = 0;
609 			dma_q->pos = 0;
610 		}
611 
612 		vbi_field_size = dev->vbi_width * dev->vbi_height * 2;
613 		if (dev->vbi_read < vbi_field_size) {
614 			remain  = vbi_field_size - dev->vbi_read;
615 			if (len < remain)
616 				lencopy = len;
617 			else
618 				lencopy = remain;
619 
620 			if (vbi_buf != NULL)
621 				au0828_copy_vbi(dev, vbi_dma_q, vbi_buf, p,
622 						vbioutp, len);
623 
624 			len -= lencopy;
625 			p += lencopy;
626 			dev->vbi_read += lencopy;
627 		}
628 
629 		if (dev->vbi_read >= vbi_field_size && buf != NULL)
630 			au0828_copy_video(dev, dma_q, buf, p, outp, len);
631 	}
632 	return rc;
633 }
634 
635 void au0828_usb_v4l2_media_release(struct au0828_dev *dev)
636 {
637 #ifdef CONFIG_MEDIA_CONTROLLER
638 	int i;
639 
640 	for (i = 0; i < AU0828_MAX_INPUT; i++) {
641 		if (AUVI_INPUT(i).type == AU0828_VMUX_UNDEFINED)
642 			return;
643 		media_device_unregister_entity(&dev->input_ent[i]);
644 	}
645 #endif
646 }
647 
648 static void au0828_usb_v4l2_release(struct v4l2_device *v4l2_dev)
649 {
650 	struct au0828_dev *dev =
651 		container_of(v4l2_dev, struct au0828_dev, v4l2_dev);
652 
653 	v4l2_ctrl_handler_free(&dev->v4l2_ctrl_hdl);
654 	v4l2_device_unregister(&dev->v4l2_dev);
655 	au0828_usb_v4l2_media_release(dev);
656 	au0828_usb_release(dev);
657 }
658 
659 int au0828_v4l2_device_register(struct usb_interface *interface,
660 				struct au0828_dev *dev)
661 {
662 	int retval;
663 
664 	if (AUVI_INPUT(0).type == AU0828_VMUX_UNDEFINED)
665 		return 0;
666 
667 	/* Create the v4l2_device */
668 #ifdef CONFIG_MEDIA_CONTROLLER
669 	dev->v4l2_dev.mdev = dev->media_dev;
670 #endif
671 	retval = v4l2_device_register(&interface->dev, &dev->v4l2_dev);
672 	if (retval) {
673 		pr_err("%s() v4l2_device_register failed\n",
674 		       __func__);
675 		return retval;
676 	}
677 
678 	dev->v4l2_dev.release = au0828_usb_v4l2_release;
679 
680 	/* This control handler will inherit the controls from au8522 */
681 	retval = v4l2_ctrl_handler_init(&dev->v4l2_ctrl_hdl, 4);
682 	if (retval) {
683 		pr_err("%s() v4l2_ctrl_handler_init failed\n",
684 		       __func__);
685 		return retval;
686 	}
687 	dev->v4l2_dev.ctrl_handler = &dev->v4l2_ctrl_hdl;
688 
689 	return 0;
690 }
691 
692 static int queue_setup(struct vb2_queue *vq,
693 		       unsigned int *nbuffers, unsigned int *nplanes,
694 		       unsigned int sizes[], struct device *alloc_devs[])
695 {
696 	struct au0828_dev *dev = vb2_get_drv_priv(vq);
697 	unsigned long size = dev->height * dev->bytesperline;
698 
699 	if (*nplanes)
700 		return sizes[0] < size ? -EINVAL : 0;
701 	*nplanes = 1;
702 	sizes[0] = size;
703 	return 0;
704 }
705 
706 static int
707 buffer_prepare(struct vb2_buffer *vb)
708 {
709 	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
710 	struct au0828_buffer *buf = container_of(vbuf,
711 				struct au0828_buffer, vb);
712 	struct au0828_dev    *dev = vb2_get_drv_priv(vb->vb2_queue);
713 
714 	buf->length = dev->height * dev->bytesperline;
715 
716 	if (vb2_plane_size(vb, 0) < buf->length) {
717 		pr_err("%s data will not fit into plane (%lu < %lu)\n",
718 			__func__, vb2_plane_size(vb, 0), buf->length);
719 		return -EINVAL;
720 	}
721 	vb2_set_plane_payload(&buf->vb.vb2_buf, 0, buf->length);
722 	return 0;
723 }
724 
725 static void
726 buffer_queue(struct vb2_buffer *vb)
727 {
728 	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
729 	struct au0828_buffer    *buf     = container_of(vbuf,
730 							struct au0828_buffer,
731 							vb);
732 	struct au0828_dev       *dev     = vb2_get_drv_priv(vb->vb2_queue);
733 	struct au0828_dmaqueue  *vidq    = &dev->vidq;
734 	unsigned long flags = 0;
735 
736 	buf->mem = vb2_plane_vaddr(vb, 0);
737 	buf->length = vb2_plane_size(vb, 0);
738 
739 	spin_lock_irqsave(&dev->slock, flags);
740 	list_add_tail(&buf->list, &vidq->active);
741 	spin_unlock_irqrestore(&dev->slock, flags);
742 }
743 
744 static int au0828_i2s_init(struct au0828_dev *dev)
745 {
746 	/* Enable i2s mode */
747 	au0828_writereg(dev, AU0828_AUDIOCTRL_50C, 0x01);
748 	return 0;
749 }
750 
751 /*
752  * Auvitek au0828 analog stream enable
753  */
754 static int au0828_analog_stream_enable(struct au0828_dev *d)
755 {
756 	struct usb_interface *iface;
757 	int ret, h, w;
758 
759 	dprintk(1, "au0828_analog_stream_enable called\n");
760 
761 	if (test_bit(DEV_DISCONNECTED, &d->dev_state))
762 		return -ENODEV;
763 
764 	iface = usb_ifnum_to_if(d->usbdev, 0);
765 	if (iface && iface->cur_altsetting->desc.bAlternateSetting != 5) {
766 		dprintk(1, "Changing intf#0 to alt 5\n");
767 		/* set au0828 interface0 to AS5 here again */
768 		ret = usb_set_interface(d->usbdev, 0, 5);
769 		if (ret < 0) {
770 			pr_info("Au0828 can't set alt setting to 5!\n");
771 			return -EBUSY;
772 		}
773 	}
774 
775 	h = d->height / 2 + 2;
776 	w = d->width * 2;
777 
778 	au0828_writereg(d, AU0828_SENSORCTRL_VBI_103, 0x00);
779 	au0828_writereg(d, 0x106, 0x00);
780 	/* set x position */
781 	au0828_writereg(d, 0x110, 0x00);
782 	au0828_writereg(d, 0x111, 0x00);
783 	au0828_writereg(d, 0x114, w & 0xff);
784 	au0828_writereg(d, 0x115, w >> 8);
785 	/* set y position */
786 	au0828_writereg(d, 0x112, 0x00);
787 	au0828_writereg(d, 0x113, 0x00);
788 	au0828_writereg(d, 0x116, h & 0xff);
789 	au0828_writereg(d, 0x117, h >> 8);
790 	au0828_writereg(d, AU0828_SENSORCTRL_100, 0xb3);
791 
792 	return 0;
793 }
794 
795 static int au0828_analog_stream_disable(struct au0828_dev *d)
796 {
797 	dprintk(1, "au0828_analog_stream_disable called\n");
798 	au0828_writereg(d, AU0828_SENSORCTRL_100, 0x0);
799 	return 0;
800 }
801 
802 static void au0828_analog_stream_reset(struct au0828_dev *dev)
803 {
804 	dprintk(1, "au0828_analog_stream_reset called\n");
805 	au0828_writereg(dev, AU0828_SENSORCTRL_100, 0x0);
806 	mdelay(30);
807 	au0828_writereg(dev, AU0828_SENSORCTRL_100, 0xb3);
808 }
809 
810 /*
811  * Some operations needs to stop current streaming
812  */
813 static int au0828_stream_interrupt(struct au0828_dev *dev)
814 {
815 	dev->stream_state = STREAM_INTERRUPT;
816 	if (test_bit(DEV_DISCONNECTED, &dev->dev_state))
817 		return -ENODEV;
818 	return 0;
819 }
820 
821 int au0828_start_analog_streaming(struct vb2_queue *vq, unsigned int count)
822 {
823 	struct au0828_dev *dev = vb2_get_drv_priv(vq);
824 	int rc = 0;
825 
826 	dprintk(1, "au0828_start_analog_streaming called %d\n",
827 		dev->streaming_users);
828 
829 	if (vq->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
830 		dev->frame_count = 0;
831 	else
832 		dev->vbi_frame_count = 0;
833 
834 	if (dev->streaming_users == 0) {
835 		/* If we were doing ac97 instead of i2s, it would go here...*/
836 		au0828_i2s_init(dev);
837 		rc = au0828_init_isoc(dev, AU0828_ISO_PACKETS_PER_URB,
838 				   AU0828_MAX_ISO_BUFS, dev->max_pkt_size,
839 				   au0828_isoc_copy);
840 		if (rc < 0) {
841 			pr_info("au0828_init_isoc failed\n");
842 			return rc;
843 		}
844 
845 		v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 1);
846 
847 		if (vq->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
848 			dev->vid_timeout_running = 1;
849 			mod_timer(&dev->vid_timeout, jiffies + (HZ / 10));
850 		} else if (vq->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
851 			dev->vbi_timeout_running = 1;
852 			mod_timer(&dev->vbi_timeout, jiffies + (HZ / 10));
853 		}
854 	}
855 	dev->streaming_users++;
856 	return rc;
857 }
858 
859 static void au0828_stop_streaming(struct vb2_queue *vq)
860 {
861 	struct au0828_dev *dev = vb2_get_drv_priv(vq);
862 	struct au0828_dmaqueue *vidq = &dev->vidq;
863 	unsigned long flags = 0;
864 
865 	dprintk(1, "au0828_stop_streaming called %d\n", dev->streaming_users);
866 
867 	if (dev->streaming_users-- == 1) {
868 		au0828_uninit_isoc(dev);
869 		v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 0);
870 	}
871 
872 	dev->vid_timeout_running = 0;
873 	del_timer_sync(&dev->vid_timeout);
874 
875 	spin_lock_irqsave(&dev->slock, flags);
876 	if (dev->isoc_ctl.buf != NULL) {
877 		vb2_buffer_done(&dev->isoc_ctl.buf->vb.vb2_buf,
878 				VB2_BUF_STATE_ERROR);
879 		dev->isoc_ctl.buf = NULL;
880 	}
881 	while (!list_empty(&vidq->active)) {
882 		struct au0828_buffer *buf;
883 
884 		buf = list_entry(vidq->active.next, struct au0828_buffer, list);
885 		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
886 		list_del(&buf->list);
887 	}
888 	spin_unlock_irqrestore(&dev->slock, flags);
889 }
890 
891 void au0828_stop_vbi_streaming(struct vb2_queue *vq)
892 {
893 	struct au0828_dev *dev = vb2_get_drv_priv(vq);
894 	struct au0828_dmaqueue *vbiq = &dev->vbiq;
895 	unsigned long flags = 0;
896 
897 	dprintk(1, "au0828_stop_vbi_streaming called %d\n",
898 		dev->streaming_users);
899 
900 	if (dev->streaming_users-- == 1) {
901 		au0828_uninit_isoc(dev);
902 		v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 0);
903 	}
904 
905 	spin_lock_irqsave(&dev->slock, flags);
906 	if (dev->isoc_ctl.vbi_buf != NULL) {
907 		vb2_buffer_done(&dev->isoc_ctl.vbi_buf->vb.vb2_buf,
908 				VB2_BUF_STATE_ERROR);
909 		dev->isoc_ctl.vbi_buf = NULL;
910 	}
911 	while (!list_empty(&vbiq->active)) {
912 		struct au0828_buffer *buf;
913 
914 		buf = list_entry(vbiq->active.next, struct au0828_buffer, list);
915 		list_del(&buf->list);
916 		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
917 	}
918 	spin_unlock_irqrestore(&dev->slock, flags);
919 
920 	dev->vbi_timeout_running = 0;
921 	del_timer_sync(&dev->vbi_timeout);
922 }
923 
924 static const struct vb2_ops au0828_video_qops = {
925 	.queue_setup     = queue_setup,
926 	.buf_prepare     = buffer_prepare,
927 	.buf_queue       = buffer_queue,
928 	.start_streaming = au0828_start_analog_streaming,
929 	.stop_streaming  = au0828_stop_streaming,
930 	.wait_prepare    = vb2_ops_wait_prepare,
931 	.wait_finish     = vb2_ops_wait_finish,
932 };
933 
934 /* ------------------------------------------------------------------
935    V4L2 interface
936    ------------------------------------------------------------------*/
937 /*
938  * au0828_analog_unregister
939  * unregister v4l2 devices
940  */
941 int au0828_analog_unregister(struct au0828_dev *dev)
942 {
943 	dprintk(1, "au0828_analog_unregister called\n");
944 
945 	/* No analog TV */
946 	if (AUVI_INPUT(0).type == AU0828_VMUX_UNDEFINED)
947 		return 0;
948 
949 	mutex_lock(&au0828_sysfs_lock);
950 	video_unregister_device(&dev->vdev);
951 	video_unregister_device(&dev->vbi_dev);
952 	mutex_unlock(&au0828_sysfs_lock);
953 
954 	v4l2_device_disconnect(&dev->v4l2_dev);
955 	v4l2_device_put(&dev->v4l2_dev);
956 
957 	return 1;
958 }
959 
960 /* This function ensures that video frames continue to be delivered even if
961    the ITU-656 input isn't receiving any data (thereby preventing applications
962    such as tvtime from hanging) */
963 static void au0828_vid_buffer_timeout(struct timer_list *t)
964 {
965 	struct au0828_dev *dev = from_timer(dev, t, vid_timeout);
966 	struct au0828_dmaqueue *dma_q = &dev->vidq;
967 	struct au0828_buffer *buf;
968 	unsigned char *vid_data;
969 	unsigned long flags = 0;
970 
971 	spin_lock_irqsave(&dev->slock, flags);
972 
973 	buf = dev->isoc_ctl.buf;
974 	if (buf != NULL) {
975 		vid_data = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
976 		memset(vid_data, 0x00, buf->length); /* Blank green frame */
977 		buffer_filled(dev, dma_q, buf);
978 	}
979 	get_next_buf(dma_q, &buf);
980 
981 	if (dev->vid_timeout_running == 1)
982 		mod_timer(&dev->vid_timeout, jiffies + (HZ / 10));
983 
984 	spin_unlock_irqrestore(&dev->slock, flags);
985 }
986 
987 static void au0828_vbi_buffer_timeout(struct timer_list *t)
988 {
989 	struct au0828_dev *dev = from_timer(dev, t, vbi_timeout);
990 	struct au0828_dmaqueue *dma_q = &dev->vbiq;
991 	struct au0828_buffer *buf;
992 	unsigned char *vbi_data;
993 	unsigned long flags = 0;
994 
995 	spin_lock_irqsave(&dev->slock, flags);
996 
997 	buf = dev->isoc_ctl.vbi_buf;
998 	if (buf != NULL) {
999 		vbi_data = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
1000 		memset(vbi_data, 0x00, buf->length);
1001 		buffer_filled(dev, dma_q, buf);
1002 	}
1003 	vbi_get_next_buf(dma_q, &buf);
1004 
1005 	if (dev->vbi_timeout_running == 1)
1006 		mod_timer(&dev->vbi_timeout, jiffies + (HZ / 10));
1007 	spin_unlock_irqrestore(&dev->slock, flags);
1008 }
1009 
1010 static int au0828_v4l2_open(struct file *filp)
1011 {
1012 	struct au0828_dev *dev = video_drvdata(filp);
1013 	int ret;
1014 
1015 	dprintk(1,
1016 		"%s called std_set %d dev_state %ld stream users %d users %d\n",
1017 		__func__, dev->std_set_in_tuner_core, dev->dev_state,
1018 		dev->streaming_users, dev->users);
1019 
1020 	if (mutex_lock_interruptible(&dev->lock))
1021 		return -ERESTARTSYS;
1022 
1023 	ret = v4l2_fh_open(filp);
1024 	if (ret) {
1025 		au0828_isocdbg("%s: v4l2_fh_open() returned error %d\n",
1026 				__func__, ret);
1027 		mutex_unlock(&dev->lock);
1028 		return ret;
1029 	}
1030 
1031 	if (dev->users == 0) {
1032 		au0828_analog_stream_enable(dev);
1033 		au0828_analog_stream_reset(dev);
1034 		dev->stream_state = STREAM_OFF;
1035 		set_bit(DEV_INITIALIZED, &dev->dev_state);
1036 	}
1037 	dev->users++;
1038 	mutex_unlock(&dev->lock);
1039 	return ret;
1040 }
1041 
1042 static int au0828_v4l2_close(struct file *filp)
1043 {
1044 	int ret;
1045 	struct au0828_dev *dev = video_drvdata(filp);
1046 	struct video_device *vdev = video_devdata(filp);
1047 
1048 	dprintk(1,
1049 		"%s called std_set %d dev_state %ld stream users %d users %d\n",
1050 		__func__, dev->std_set_in_tuner_core, dev->dev_state,
1051 		dev->streaming_users, dev->users);
1052 
1053 	mutex_lock(&dev->lock);
1054 	if (vdev->vfl_type == VFL_TYPE_GRABBER && dev->vid_timeout_running) {
1055 		/* Cancel timeout thread in case they didn't call streamoff */
1056 		dev->vid_timeout_running = 0;
1057 		del_timer_sync(&dev->vid_timeout);
1058 	} else if (vdev->vfl_type == VFL_TYPE_VBI &&
1059 			dev->vbi_timeout_running) {
1060 		/* Cancel timeout thread in case they didn't call streamoff */
1061 		dev->vbi_timeout_running = 0;
1062 		del_timer_sync(&dev->vbi_timeout);
1063 	}
1064 
1065 	if (test_bit(DEV_DISCONNECTED, &dev->dev_state))
1066 		goto end;
1067 
1068 	if (dev->users == 1) {
1069 		/*
1070 		 * Avoid putting tuner in sleep if DVB or ALSA are
1071 		 * streaming.
1072 		 *
1073 		 * On most USB devices  like au0828 the tuner can
1074 		 * be safely put in sleep state here if ALSA isn't
1075 		 * streaming. Exceptions are some very old USB tuner
1076 		 * models such as em28xx-based WinTV USB2 which have
1077 		 * a separate audio output jack. The devices that have
1078 		 * a separate audio output jack have analog tuners,
1079 		 * like Philips FM1236. Those devices are always on,
1080 		 * so the s_power callback are silently ignored.
1081 		 * So, the current logic here does the following:
1082 		 * Disable (put tuner to sleep) when
1083 		 * - ALSA and DVB aren't streaming.
1084 		 * - the last V4L2 file handler is closed.
1085 		 *
1086 		 * FIXME:
1087 		 *
1088 		 * Additionally, this logic could be improved to
1089 		 * disable the media source if the above conditions
1090 		 * are met and if the device:
1091 		 * - doesn't have a separate audio out plug (or
1092 		 * - doesn't use a silicon tuner like xc2028/3028/4000/5000).
1093 		 *
1094 		 * Once this additional logic is in place, a callback
1095 		 * is needed to enable the media source and power on
1096 		 * the tuner, for radio to work.
1097 		*/
1098 		ret = v4l_enable_media_source(vdev);
1099 		if (ret == 0)
1100 			v4l2_device_call_all(&dev->v4l2_dev, 0, tuner,
1101 					     standby);
1102 		dev->std_set_in_tuner_core = 0;
1103 
1104 		/* When close the device, set the usb intf0 into alt0 to free
1105 		   USB bandwidth */
1106 		ret = usb_set_interface(dev->usbdev, 0, 0);
1107 		if (ret < 0)
1108 			pr_info("Au0828 can't set alternate to 0!\n");
1109 	}
1110 end:
1111 	_vb2_fop_release(filp, NULL);
1112 	dev->users--;
1113 	mutex_unlock(&dev->lock);
1114 	return 0;
1115 }
1116 
1117 /* Must be called with dev->lock held */
1118 static void au0828_init_tuner(struct au0828_dev *dev)
1119 {
1120 	struct v4l2_frequency f = {
1121 		.frequency = dev->ctrl_freq,
1122 		.type = V4L2_TUNER_ANALOG_TV,
1123 	};
1124 
1125 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1126 		dev->std_set_in_tuner_core, dev->dev_state);
1127 
1128 	if (dev->std_set_in_tuner_core)
1129 		return;
1130 	dev->std_set_in_tuner_core = 1;
1131 	i2c_gate_ctrl(dev, 1);
1132 	/* If we've never sent the standard in tuner core, do so now.
1133 	   We don't do this at device probe because we don't want to
1134 	   incur the cost of a firmware load */
1135 	v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_std, dev->std);
1136 	v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, &f);
1137 	i2c_gate_ctrl(dev, 0);
1138 }
1139 
1140 static int au0828_set_format(struct au0828_dev *dev, unsigned int cmd,
1141 			     struct v4l2_format *format)
1142 {
1143 	int ret;
1144 	int width = format->fmt.pix.width;
1145 	int height = format->fmt.pix.height;
1146 
1147 	/* If they are demanding a format other than the one we support,
1148 	   bail out (tvtime asks for UYVY and then retries with YUYV) */
1149 	if (format->fmt.pix.pixelformat != V4L2_PIX_FMT_UYVY)
1150 		return -EINVAL;
1151 
1152 	/* format->fmt.pix.width only support 720 and height 480 */
1153 	if (width != 720)
1154 		width = 720;
1155 	if (height != 480)
1156 		height = 480;
1157 
1158 	format->fmt.pix.width = width;
1159 	format->fmt.pix.height = height;
1160 	format->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY;
1161 	format->fmt.pix.bytesperline = width * 2;
1162 	format->fmt.pix.sizeimage = width * height * 2;
1163 	format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1164 	format->fmt.pix.field = V4L2_FIELD_INTERLACED;
1165 	format->fmt.pix.priv = 0;
1166 
1167 	if (cmd == VIDIOC_TRY_FMT)
1168 		return 0;
1169 
1170 	/* maybe set new image format, driver current only support 720*480 */
1171 	dev->width = width;
1172 	dev->height = height;
1173 	dev->frame_size = width * height * 2;
1174 	dev->field_size = width * height;
1175 	dev->bytesperline = width * 2;
1176 
1177 	if (dev->stream_state == STREAM_ON) {
1178 		dprintk(1, "VIDIOC_SET_FMT: interrupting stream!\n");
1179 		ret = au0828_stream_interrupt(dev);
1180 		if (ret != 0) {
1181 			dprintk(1, "error interrupting video stream!\n");
1182 			return ret;
1183 		}
1184 	}
1185 
1186 	au0828_analog_stream_enable(dev);
1187 
1188 	return 0;
1189 }
1190 
1191 static int vidioc_querycap(struct file *file, void  *priv,
1192 			   struct v4l2_capability *cap)
1193 {
1194 	struct video_device *vdev = video_devdata(file);
1195 	struct au0828_dev *dev = video_drvdata(file);
1196 
1197 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1198 		dev->std_set_in_tuner_core, dev->dev_state);
1199 
1200 	strscpy(cap->driver, "au0828", sizeof(cap->driver));
1201 	strscpy(cap->card, dev->board.name, sizeof(cap->card));
1202 	usb_make_path(dev->usbdev, cap->bus_info, sizeof(cap->bus_info));
1203 
1204 	/* set the device capabilities */
1205 	cap->device_caps = V4L2_CAP_AUDIO |
1206 		V4L2_CAP_READWRITE |
1207 		V4L2_CAP_STREAMING |
1208 		V4L2_CAP_TUNER;
1209 	if (vdev->vfl_type == VFL_TYPE_GRABBER)
1210 		cap->device_caps |= V4L2_CAP_VIDEO_CAPTURE;
1211 	else
1212 		cap->device_caps |= V4L2_CAP_VBI_CAPTURE;
1213 	cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS |
1214 		V4L2_CAP_VBI_CAPTURE | V4L2_CAP_VIDEO_CAPTURE;
1215 	return 0;
1216 }
1217 
1218 static int vidioc_enum_fmt_vid_cap(struct file *file, void  *priv,
1219 					struct v4l2_fmtdesc *f)
1220 {
1221 	if (f->index)
1222 		return -EINVAL;
1223 
1224 	dprintk(1, "%s called\n", __func__);
1225 
1226 	f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1227 	strscpy(f->description, "Packed YUV2", sizeof(f->description));
1228 
1229 	f->flags = 0;
1230 	f->pixelformat = V4L2_PIX_FMT_UYVY;
1231 
1232 	return 0;
1233 }
1234 
1235 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
1236 					struct v4l2_format *f)
1237 {
1238 	struct au0828_dev *dev = video_drvdata(file);
1239 
1240 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1241 		dev->std_set_in_tuner_core, dev->dev_state);
1242 
1243 	f->fmt.pix.width = dev->width;
1244 	f->fmt.pix.height = dev->height;
1245 	f->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY;
1246 	f->fmt.pix.bytesperline = dev->bytesperline;
1247 	f->fmt.pix.sizeimage = dev->frame_size;
1248 	f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; /* NTSC/PAL */
1249 	f->fmt.pix.field = V4L2_FIELD_INTERLACED;
1250 	f->fmt.pix.priv = 0;
1251 	return 0;
1252 }
1253 
1254 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
1255 				  struct v4l2_format *f)
1256 {
1257 	struct au0828_dev *dev = video_drvdata(file);
1258 
1259 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1260 		dev->std_set_in_tuner_core, dev->dev_state);
1261 
1262 	return au0828_set_format(dev, VIDIOC_TRY_FMT, f);
1263 }
1264 
1265 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1266 				struct v4l2_format *f)
1267 {
1268 	struct au0828_dev *dev = video_drvdata(file);
1269 	int rc;
1270 
1271 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1272 		dev->std_set_in_tuner_core, dev->dev_state);
1273 
1274 	rc = check_dev(dev);
1275 	if (rc < 0)
1276 		return rc;
1277 
1278 	if (vb2_is_busy(&dev->vb_vidq)) {
1279 		pr_info("%s queue busy\n", __func__);
1280 		rc = -EBUSY;
1281 		goto out;
1282 	}
1283 
1284 	rc = au0828_set_format(dev, VIDIOC_S_FMT, f);
1285 out:
1286 	return rc;
1287 }
1288 
1289 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm)
1290 {
1291 	struct au0828_dev *dev = video_drvdata(file);
1292 
1293 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1294 		dev->std_set_in_tuner_core, dev->dev_state);
1295 
1296 	if (norm == dev->std)
1297 		return 0;
1298 
1299 	if (dev->streaming_users > 0)
1300 		return -EBUSY;
1301 
1302 	dev->std = norm;
1303 
1304 	au0828_init_tuner(dev);
1305 
1306 	i2c_gate_ctrl(dev, 1);
1307 
1308 	/*
1309 	 * FIXME: when we support something other than 60Hz standards,
1310 	 * we are going to have to make the au0828 bridge adjust the size
1311 	 * of its capture buffer, which is currently hardcoded at 720x480
1312 	 */
1313 
1314 	v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_std, norm);
1315 
1316 	i2c_gate_ctrl(dev, 0);
1317 
1318 	return 0;
1319 }
1320 
1321 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm)
1322 {
1323 	struct au0828_dev *dev = video_drvdata(file);
1324 
1325 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1326 		dev->std_set_in_tuner_core, dev->dev_state);
1327 
1328 	*norm = dev->std;
1329 	return 0;
1330 }
1331 
1332 static int vidioc_enum_input(struct file *file, void *priv,
1333 				struct v4l2_input *input)
1334 {
1335 	struct au0828_dev *dev = video_drvdata(file);
1336 	unsigned int tmp;
1337 
1338 	static const char *inames[] = {
1339 		[AU0828_VMUX_UNDEFINED] = "Undefined",
1340 		[AU0828_VMUX_COMPOSITE] = "Composite",
1341 		[AU0828_VMUX_SVIDEO] = "S-Video",
1342 		[AU0828_VMUX_CABLE] = "Cable TV",
1343 		[AU0828_VMUX_TELEVISION] = "Television",
1344 		[AU0828_VMUX_DVB] = "DVB",
1345 	};
1346 
1347 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1348 		dev->std_set_in_tuner_core, dev->dev_state);
1349 
1350 	tmp = input->index;
1351 
1352 	if (tmp >= AU0828_MAX_INPUT)
1353 		return -EINVAL;
1354 	if (AUVI_INPUT(tmp).type == 0)
1355 		return -EINVAL;
1356 
1357 	input->index = tmp;
1358 	strscpy(input->name, inames[AUVI_INPUT(tmp).type], sizeof(input->name));
1359 	if ((AUVI_INPUT(tmp).type == AU0828_VMUX_TELEVISION) ||
1360 	    (AUVI_INPUT(tmp).type == AU0828_VMUX_CABLE)) {
1361 		input->type |= V4L2_INPUT_TYPE_TUNER;
1362 		input->audioset = 1;
1363 	} else {
1364 		input->type |= V4L2_INPUT_TYPE_CAMERA;
1365 		input->audioset = 2;
1366 	}
1367 
1368 	input->std = dev->vdev.tvnorms;
1369 
1370 	return 0;
1371 }
1372 
1373 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1374 {
1375 	struct au0828_dev *dev = video_drvdata(file);
1376 
1377 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1378 		dev->std_set_in_tuner_core, dev->dev_state);
1379 
1380 	*i = dev->ctrl_input;
1381 	return 0;
1382 }
1383 
1384 static void au0828_s_input(struct au0828_dev *dev, int index)
1385 {
1386 	int i;
1387 
1388 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1389 		dev->std_set_in_tuner_core, dev->dev_state);
1390 
1391 	switch (AUVI_INPUT(index).type) {
1392 	case AU0828_VMUX_SVIDEO:
1393 		dev->input_type = AU0828_VMUX_SVIDEO;
1394 		dev->ctrl_ainput = 1;
1395 		break;
1396 	case AU0828_VMUX_COMPOSITE:
1397 		dev->input_type = AU0828_VMUX_COMPOSITE;
1398 		dev->ctrl_ainput = 1;
1399 		break;
1400 	case AU0828_VMUX_TELEVISION:
1401 		dev->input_type = AU0828_VMUX_TELEVISION;
1402 		dev->ctrl_ainput = 0;
1403 		break;
1404 	default:
1405 		dprintk(1, "unknown input type set [%d]\n",
1406 			AUVI_INPUT(index).type);
1407 		return;
1408 	}
1409 
1410 	dev->ctrl_input = index;
1411 
1412 	v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_routing,
1413 			AUVI_INPUT(index).vmux, 0, 0);
1414 
1415 	for (i = 0; i < AU0828_MAX_INPUT; i++) {
1416 		int enable = 0;
1417 		if (AUVI_INPUT(i).audio_setup == NULL)
1418 			continue;
1419 
1420 		if (i == index)
1421 			enable = 1;
1422 		else
1423 			enable = 0;
1424 		if (enable) {
1425 			(AUVI_INPUT(i).audio_setup)(dev, enable);
1426 		} else {
1427 			/* Make sure we leave it turned on if some
1428 			   other input is routed to this callback */
1429 			if ((AUVI_INPUT(i).audio_setup) !=
1430 			    ((AUVI_INPUT(index).audio_setup))) {
1431 				(AUVI_INPUT(i).audio_setup)(dev, enable);
1432 			}
1433 		}
1434 	}
1435 
1436 	v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing,
1437 			AUVI_INPUT(index).amux, 0, 0);
1438 }
1439 
1440 static int vidioc_s_input(struct file *file, void *priv, unsigned int index)
1441 {
1442 	struct au0828_dev *dev = video_drvdata(file);
1443 	struct video_device *vfd = video_devdata(file);
1444 
1445 	dprintk(1, "VIDIOC_S_INPUT in function %s, input=%d\n", __func__,
1446 		index);
1447 	if (index >= AU0828_MAX_INPUT)
1448 		return -EINVAL;
1449 	if (AUVI_INPUT(index).type == 0)
1450 		return -EINVAL;
1451 
1452 	if (dev->ctrl_input == index)
1453 		return 0;
1454 
1455 	au0828_s_input(dev, index);
1456 
1457 	/*
1458 	 * Input has been changed. Disable the media source
1459 	 * associated with the old input and enable source
1460 	 * for the newly set input
1461 	 */
1462 	v4l_disable_media_source(vfd);
1463 	return v4l_enable_media_source(vfd);
1464 }
1465 
1466 static int vidioc_enumaudio(struct file *file, void *priv, struct v4l2_audio *a)
1467 {
1468 	if (a->index > 1)
1469 		return -EINVAL;
1470 
1471 	dprintk(1, "%s called\n", __func__);
1472 
1473 	if (a->index == 0)
1474 		strscpy(a->name, "Television", sizeof(a->name));
1475 	else
1476 		strscpy(a->name, "Line in", sizeof(a->name));
1477 
1478 	a->capability = V4L2_AUDCAP_STEREO;
1479 	return 0;
1480 }
1481 
1482 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1483 {
1484 	struct au0828_dev *dev = video_drvdata(file);
1485 
1486 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1487 		dev->std_set_in_tuner_core, dev->dev_state);
1488 
1489 	a->index = dev->ctrl_ainput;
1490 	if (a->index == 0)
1491 		strscpy(a->name, "Television", sizeof(a->name));
1492 	else
1493 		strscpy(a->name, "Line in", sizeof(a->name));
1494 
1495 	a->capability = V4L2_AUDCAP_STEREO;
1496 	return 0;
1497 }
1498 
1499 static int vidioc_s_audio(struct file *file, void *priv, const struct v4l2_audio *a)
1500 {
1501 	struct au0828_dev *dev = video_drvdata(file);
1502 
1503 	if (a->index != dev->ctrl_ainput)
1504 		return -EINVAL;
1505 
1506 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1507 		dev->std_set_in_tuner_core, dev->dev_state);
1508 	return 0;
1509 }
1510 
1511 static int vidioc_g_tuner(struct file *file, void *priv, struct v4l2_tuner *t)
1512 {
1513 	struct au0828_dev *dev = video_drvdata(file);
1514 	struct video_device *vfd = video_devdata(file);
1515 	int ret;
1516 
1517 	if (t->index != 0)
1518 		return -EINVAL;
1519 
1520 	ret = v4l_enable_media_source(vfd);
1521 	if (ret)
1522 		return ret;
1523 
1524 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1525 		dev->std_set_in_tuner_core, dev->dev_state);
1526 
1527 	strscpy(t->name, "Auvitek tuner", sizeof(t->name));
1528 
1529 	au0828_init_tuner(dev);
1530 	i2c_gate_ctrl(dev, 1);
1531 	v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t);
1532 	i2c_gate_ctrl(dev, 0);
1533 	return 0;
1534 }
1535 
1536 static int vidioc_s_tuner(struct file *file, void *priv,
1537 				const struct v4l2_tuner *t)
1538 {
1539 	struct au0828_dev *dev = video_drvdata(file);
1540 
1541 	if (t->index != 0)
1542 		return -EINVAL;
1543 
1544 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1545 		dev->std_set_in_tuner_core, dev->dev_state);
1546 
1547 	au0828_init_tuner(dev);
1548 	i2c_gate_ctrl(dev, 1);
1549 	v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t);
1550 	i2c_gate_ctrl(dev, 0);
1551 
1552 	dprintk(1, "VIDIOC_S_TUNER: signal = %x, afc = %x\n", t->signal,
1553 		t->afc);
1554 
1555 	return 0;
1556 
1557 }
1558 
1559 static int vidioc_g_frequency(struct file *file, void *priv,
1560 				struct v4l2_frequency *freq)
1561 {
1562 	struct au0828_dev *dev = video_drvdata(file);
1563 
1564 	if (freq->tuner != 0)
1565 		return -EINVAL;
1566 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1567 		dev->std_set_in_tuner_core, dev->dev_state);
1568 	freq->frequency = dev->ctrl_freq;
1569 	return 0;
1570 }
1571 
1572 static int vidioc_s_frequency(struct file *file, void *priv,
1573 				const struct v4l2_frequency *freq)
1574 {
1575 	struct au0828_dev *dev = video_drvdata(file);
1576 	struct v4l2_frequency new_freq = *freq;
1577 
1578 	if (freq->tuner != 0)
1579 		return -EINVAL;
1580 
1581 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1582 		dev->std_set_in_tuner_core, dev->dev_state);
1583 
1584 	au0828_init_tuner(dev);
1585 	i2c_gate_ctrl(dev, 1);
1586 
1587 	v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, freq);
1588 	/* Get the actual set (and possibly clamped) frequency */
1589 	v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_frequency, &new_freq);
1590 	dev->ctrl_freq = new_freq.frequency;
1591 
1592 	i2c_gate_ctrl(dev, 0);
1593 
1594 	au0828_analog_stream_reset(dev);
1595 
1596 	return 0;
1597 }
1598 
1599 
1600 /* RAW VBI ioctls */
1601 
1602 static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
1603 				struct v4l2_format *format)
1604 {
1605 	struct au0828_dev *dev = video_drvdata(file);
1606 
1607 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1608 		dev->std_set_in_tuner_core, dev->dev_state);
1609 
1610 	format->fmt.vbi.samples_per_line = dev->vbi_width;
1611 	format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
1612 	format->fmt.vbi.offset = 0;
1613 	format->fmt.vbi.flags = 0;
1614 	format->fmt.vbi.sampling_rate = 6750000 * 4 / 2;
1615 
1616 	format->fmt.vbi.count[0] = dev->vbi_height;
1617 	format->fmt.vbi.count[1] = dev->vbi_height;
1618 	format->fmt.vbi.start[0] = 21;
1619 	format->fmt.vbi.start[1] = 284;
1620 	memset(format->fmt.vbi.reserved, 0, sizeof(format->fmt.vbi.reserved));
1621 
1622 	return 0;
1623 }
1624 
1625 static int vidioc_g_pixelaspect(struct file *file, void *priv,
1626 				int type, struct v4l2_fract *f)
1627 {
1628 	struct au0828_dev *dev = video_drvdata(file);
1629 
1630 	if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1631 		return -EINVAL;
1632 
1633 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1634 		dev->std_set_in_tuner_core, dev->dev_state);
1635 
1636 	f->numerator = 54;
1637 	f->denominator = 59;
1638 
1639 	return 0;
1640 }
1641 
1642 static int vidioc_g_selection(struct file *file, void *priv,
1643 			      struct v4l2_selection *s)
1644 {
1645 	struct au0828_dev *dev = video_drvdata(file);
1646 
1647 	if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1648 		return -EINVAL;
1649 
1650 	switch (s->target) {
1651 	case V4L2_SEL_TGT_CROP_BOUNDS:
1652 	case V4L2_SEL_TGT_CROP_DEFAULT:
1653 		s->r.left = 0;
1654 		s->r.top = 0;
1655 		s->r.width = dev->width;
1656 		s->r.height = dev->height;
1657 		break;
1658 	default:
1659 		return -EINVAL;
1660 	}
1661 	return 0;
1662 }
1663 
1664 #ifdef CONFIG_VIDEO_ADV_DEBUG
1665 static int vidioc_g_register(struct file *file, void *priv,
1666 			     struct v4l2_dbg_register *reg)
1667 {
1668 	struct au0828_dev *dev = video_drvdata(file);
1669 
1670 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1671 		dev->std_set_in_tuner_core, dev->dev_state);
1672 
1673 	reg->val = au0828_read(dev, reg->reg);
1674 	reg->size = 1;
1675 	return 0;
1676 }
1677 
1678 static int vidioc_s_register(struct file *file, void *priv,
1679 			     const struct v4l2_dbg_register *reg)
1680 {
1681 	struct au0828_dev *dev = video_drvdata(file);
1682 
1683 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1684 		dev->std_set_in_tuner_core, dev->dev_state);
1685 
1686 	return au0828_writereg(dev, reg->reg, reg->val);
1687 }
1688 #endif
1689 
1690 static int vidioc_log_status(struct file *file, void *fh)
1691 {
1692 	struct video_device *vdev = video_devdata(file);
1693 
1694 	dprintk(1, "%s called\n", __func__);
1695 
1696 	v4l2_ctrl_log_status(file, fh);
1697 	v4l2_device_call_all(vdev->v4l2_dev, 0, core, log_status);
1698 	return 0;
1699 }
1700 
1701 void au0828_v4l2_suspend(struct au0828_dev *dev)
1702 {
1703 	struct urb *urb;
1704 	int i;
1705 
1706 	pr_info("stopping V4L2\n");
1707 
1708 	if (dev->stream_state == STREAM_ON) {
1709 		pr_info("stopping V4L2 active URBs\n");
1710 		au0828_analog_stream_disable(dev);
1711 		/* stop urbs */
1712 		for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
1713 			urb = dev->isoc_ctl.urb[i];
1714 			if (urb) {
1715 				if (!irqs_disabled())
1716 					usb_kill_urb(urb);
1717 				else
1718 					usb_unlink_urb(urb);
1719 			}
1720 		}
1721 	}
1722 
1723 	if (dev->vid_timeout_running)
1724 		del_timer_sync(&dev->vid_timeout);
1725 	if (dev->vbi_timeout_running)
1726 		del_timer_sync(&dev->vbi_timeout);
1727 }
1728 
1729 void au0828_v4l2_resume(struct au0828_dev *dev)
1730 {
1731 	int i, rc;
1732 
1733 	pr_info("restarting V4L2\n");
1734 
1735 	if (dev->stream_state == STREAM_ON) {
1736 		au0828_stream_interrupt(dev);
1737 		au0828_init_tuner(dev);
1738 	}
1739 
1740 	if (dev->vid_timeout_running)
1741 		mod_timer(&dev->vid_timeout, jiffies + (HZ / 10));
1742 	if (dev->vbi_timeout_running)
1743 		mod_timer(&dev->vbi_timeout, jiffies + (HZ / 10));
1744 
1745 	/* If we were doing ac97 instead of i2s, it would go here...*/
1746 	au0828_i2s_init(dev);
1747 
1748 	au0828_analog_stream_enable(dev);
1749 
1750 	if (!(dev->stream_state == STREAM_ON)) {
1751 		au0828_analog_stream_reset(dev);
1752 		/* submit urbs */
1753 		for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
1754 			rc = usb_submit_urb(dev->isoc_ctl.urb[i], GFP_ATOMIC);
1755 			if (rc) {
1756 				au0828_isocdbg("submit of urb %i failed (error=%i)\n",
1757 					       i, rc);
1758 				au0828_uninit_isoc(dev);
1759 			}
1760 		}
1761 	}
1762 }
1763 
1764 static const struct v4l2_file_operations au0828_v4l_fops = {
1765 	.owner      = THIS_MODULE,
1766 	.open       = au0828_v4l2_open,
1767 	.release    = au0828_v4l2_close,
1768 	.read       = vb2_fop_read,
1769 	.poll       = vb2_fop_poll,
1770 	.mmap       = vb2_fop_mmap,
1771 	.unlocked_ioctl = video_ioctl2,
1772 };
1773 
1774 static const struct v4l2_ioctl_ops video_ioctl_ops = {
1775 	.vidioc_querycap            = vidioc_querycap,
1776 	.vidioc_enum_fmt_vid_cap    = vidioc_enum_fmt_vid_cap,
1777 	.vidioc_g_fmt_vid_cap       = vidioc_g_fmt_vid_cap,
1778 	.vidioc_try_fmt_vid_cap     = vidioc_try_fmt_vid_cap,
1779 	.vidioc_s_fmt_vid_cap       = vidioc_s_fmt_vid_cap,
1780 	.vidioc_g_fmt_vbi_cap       = vidioc_g_fmt_vbi_cap,
1781 	.vidioc_try_fmt_vbi_cap     = vidioc_g_fmt_vbi_cap,
1782 	.vidioc_s_fmt_vbi_cap       = vidioc_g_fmt_vbi_cap,
1783 	.vidioc_enumaudio           = vidioc_enumaudio,
1784 	.vidioc_g_audio             = vidioc_g_audio,
1785 	.vidioc_s_audio             = vidioc_s_audio,
1786 	.vidioc_g_pixelaspect       = vidioc_g_pixelaspect,
1787 	.vidioc_g_selection         = vidioc_g_selection,
1788 
1789 	.vidioc_reqbufs             = vb2_ioctl_reqbufs,
1790 	.vidioc_create_bufs         = vb2_ioctl_create_bufs,
1791 	.vidioc_prepare_buf         = vb2_ioctl_prepare_buf,
1792 	.vidioc_querybuf            = vb2_ioctl_querybuf,
1793 	.vidioc_qbuf                = vb2_ioctl_qbuf,
1794 	.vidioc_dqbuf               = vb2_ioctl_dqbuf,
1795 	.vidioc_expbuf               = vb2_ioctl_expbuf,
1796 
1797 	.vidioc_s_std               = vidioc_s_std,
1798 	.vidioc_g_std               = vidioc_g_std,
1799 	.vidioc_enum_input          = vidioc_enum_input,
1800 	.vidioc_g_input             = vidioc_g_input,
1801 	.vidioc_s_input             = vidioc_s_input,
1802 
1803 	.vidioc_streamon            = vb2_ioctl_streamon,
1804 	.vidioc_streamoff           = vb2_ioctl_streamoff,
1805 
1806 	.vidioc_g_tuner             = vidioc_g_tuner,
1807 	.vidioc_s_tuner             = vidioc_s_tuner,
1808 	.vidioc_g_frequency         = vidioc_g_frequency,
1809 	.vidioc_s_frequency         = vidioc_s_frequency,
1810 #ifdef CONFIG_VIDEO_ADV_DEBUG
1811 	.vidioc_g_register          = vidioc_g_register,
1812 	.vidioc_s_register          = vidioc_s_register,
1813 #endif
1814 	.vidioc_log_status	    = vidioc_log_status,
1815 	.vidioc_subscribe_event     = v4l2_ctrl_subscribe_event,
1816 	.vidioc_unsubscribe_event   = v4l2_event_unsubscribe,
1817 };
1818 
1819 static const struct video_device au0828_video_template = {
1820 	.fops                       = &au0828_v4l_fops,
1821 	.release                    = video_device_release_empty,
1822 	.ioctl_ops		    = &video_ioctl_ops,
1823 	.tvnorms                    = V4L2_STD_NTSC_M | V4L2_STD_PAL_M,
1824 };
1825 
1826 static int au0828_vb2_setup(struct au0828_dev *dev)
1827 {
1828 	int rc;
1829 	struct vb2_queue *q;
1830 
1831 	/* Setup Videobuf2 for Video capture */
1832 	q = &dev->vb_vidq;
1833 	q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1834 	q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1835 	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1836 	q->drv_priv = dev;
1837 	q->buf_struct_size = sizeof(struct au0828_buffer);
1838 	q->ops = &au0828_video_qops;
1839 	q->mem_ops = &vb2_vmalloc_memops;
1840 
1841 	rc = vb2_queue_init(q);
1842 	if (rc < 0)
1843 		return rc;
1844 
1845 	/* Setup Videobuf2 for VBI capture */
1846 	q = &dev->vb_vbiq;
1847 	q->type = V4L2_BUF_TYPE_VBI_CAPTURE;
1848 	q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1849 	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1850 	q->drv_priv = dev;
1851 	q->buf_struct_size = sizeof(struct au0828_buffer);
1852 	q->ops = &au0828_vbi_qops;
1853 	q->mem_ops = &vb2_vmalloc_memops;
1854 
1855 	rc = vb2_queue_init(q);
1856 	if (rc < 0)
1857 		return rc;
1858 
1859 	return 0;
1860 }
1861 
1862 static void au0828_analog_create_entities(struct au0828_dev *dev)
1863 {
1864 #if defined(CONFIG_MEDIA_CONTROLLER)
1865 	static const char * const inames[] = {
1866 		[AU0828_VMUX_COMPOSITE] = "Composite",
1867 		[AU0828_VMUX_SVIDEO] = "S-Video",
1868 		[AU0828_VMUX_CABLE] = "Cable TV",
1869 		[AU0828_VMUX_TELEVISION] = "Television",
1870 		[AU0828_VMUX_DVB] = "DVB",
1871 	};
1872 	int ret, i;
1873 
1874 	/* Initialize Video and VBI pads */
1875 	dev->video_pad.flags = MEDIA_PAD_FL_SINK;
1876 	ret = media_entity_pads_init(&dev->vdev.entity, 1, &dev->video_pad);
1877 	if (ret < 0)
1878 		pr_err("failed to initialize video media entity!\n");
1879 
1880 	dev->vbi_pad.flags = MEDIA_PAD_FL_SINK;
1881 	ret = media_entity_pads_init(&dev->vbi_dev.entity, 1, &dev->vbi_pad);
1882 	if (ret < 0)
1883 		pr_err("failed to initialize vbi media entity!\n");
1884 
1885 	/* Create entities for each input connector */
1886 	for (i = 0; i < AU0828_MAX_INPUT; i++) {
1887 		struct media_entity *ent = &dev->input_ent[i];
1888 
1889 		if (AUVI_INPUT(i).type == AU0828_VMUX_UNDEFINED)
1890 			break;
1891 
1892 		ent->name = inames[AUVI_INPUT(i).type];
1893 		ent->flags = MEDIA_ENT_FL_CONNECTOR;
1894 		dev->input_pad[i].flags = MEDIA_PAD_FL_SOURCE;
1895 
1896 		switch (AUVI_INPUT(i).type) {
1897 		case AU0828_VMUX_COMPOSITE:
1898 			ent->function = MEDIA_ENT_F_CONN_COMPOSITE;
1899 			break;
1900 		case AU0828_VMUX_SVIDEO:
1901 			ent->function = MEDIA_ENT_F_CONN_SVIDEO;
1902 			break;
1903 		case AU0828_VMUX_CABLE:
1904 		case AU0828_VMUX_TELEVISION:
1905 		case AU0828_VMUX_DVB:
1906 		default: /* Just to shut up a warning */
1907 			ent->function = MEDIA_ENT_F_CONN_RF;
1908 			break;
1909 		}
1910 
1911 		ret = media_entity_pads_init(ent, 1, &dev->input_pad[i]);
1912 		if (ret < 0)
1913 			pr_err("failed to initialize input pad[%d]!\n", i);
1914 
1915 		ret = media_device_register_entity(dev->media_dev, ent);
1916 		if (ret < 0)
1917 			pr_err("failed to register input entity %d!\n", i);
1918 	}
1919 #endif
1920 }
1921 
1922 /**************************************************************************/
1923 
1924 int au0828_analog_register(struct au0828_dev *dev,
1925 			   struct usb_interface *interface)
1926 {
1927 	int retval = -ENOMEM;
1928 	struct usb_host_interface *iface_desc;
1929 	struct usb_endpoint_descriptor *endpoint;
1930 	int i, ret;
1931 
1932 	dprintk(1, "au0828_analog_register called for intf#%d!\n",
1933 		interface->cur_altsetting->desc.bInterfaceNumber);
1934 
1935 	/* No analog TV */
1936 	if (AUVI_INPUT(0).type == AU0828_VMUX_UNDEFINED)
1937 		return 0;
1938 
1939 	/* set au0828 usb interface0 to as5 */
1940 	retval = usb_set_interface(dev->usbdev,
1941 			interface->cur_altsetting->desc.bInterfaceNumber, 5);
1942 	if (retval != 0) {
1943 		pr_info("Failure setting usb interface0 to as5\n");
1944 		return retval;
1945 	}
1946 
1947 	/* Figure out which endpoint has the isoc interface */
1948 	iface_desc = interface->cur_altsetting;
1949 	for (i = 0; i < iface_desc->desc.bNumEndpoints; i++) {
1950 		endpoint = &iface_desc->endpoint[i].desc;
1951 		if (((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
1952 		     == USB_DIR_IN) &&
1953 		    ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
1954 		     == USB_ENDPOINT_XFER_ISOC)) {
1955 
1956 			/* we find our isoc in endpoint */
1957 			u16 tmp = le16_to_cpu(endpoint->wMaxPacketSize);
1958 			dev->max_pkt_size = (tmp & 0x07ff) *
1959 				(((tmp & 0x1800) >> 11) + 1);
1960 			dev->isoc_in_endpointaddr = endpoint->bEndpointAddress;
1961 			dprintk(1,
1962 				"Found isoc endpoint 0x%02x, max size = %d\n",
1963 				dev->isoc_in_endpointaddr, dev->max_pkt_size);
1964 		}
1965 	}
1966 	if (!(dev->isoc_in_endpointaddr)) {
1967 		pr_info("Could not locate isoc endpoint\n");
1968 		return -ENODEV;
1969 	}
1970 
1971 	init_waitqueue_head(&dev->open);
1972 	spin_lock_init(&dev->slock);
1973 
1974 	/* init video dma queues */
1975 	INIT_LIST_HEAD(&dev->vidq.active);
1976 	INIT_LIST_HEAD(&dev->vbiq.active);
1977 
1978 	timer_setup(&dev->vid_timeout, au0828_vid_buffer_timeout, 0);
1979 	timer_setup(&dev->vbi_timeout, au0828_vbi_buffer_timeout, 0);
1980 
1981 	dev->width = NTSC_STD_W;
1982 	dev->height = NTSC_STD_H;
1983 	dev->field_size = dev->width * dev->height;
1984 	dev->frame_size = dev->field_size << 1;
1985 	dev->bytesperline = dev->width << 1;
1986 	dev->vbi_width = 720;
1987 	dev->vbi_height = 1;
1988 	dev->ctrl_ainput = 0;
1989 	dev->ctrl_freq = 960;
1990 	dev->std = V4L2_STD_NTSC_M;
1991 	/* Default input is TV Tuner */
1992 	au0828_s_input(dev, 0);
1993 
1994 	mutex_init(&dev->vb_queue_lock);
1995 	mutex_init(&dev->vb_vbi_queue_lock);
1996 
1997 	/* Fill the video capture device struct */
1998 	dev->vdev = au0828_video_template;
1999 	dev->vdev.v4l2_dev = &dev->v4l2_dev;
2000 	dev->vdev.lock = &dev->lock;
2001 	dev->vdev.queue = &dev->vb_vidq;
2002 	dev->vdev.queue->lock = &dev->vb_queue_lock;
2003 	strscpy(dev->vdev.name, "au0828a video", sizeof(dev->vdev.name));
2004 
2005 	/* Setup the VBI device */
2006 	dev->vbi_dev = au0828_video_template;
2007 	dev->vbi_dev.v4l2_dev = &dev->v4l2_dev;
2008 	dev->vbi_dev.lock = &dev->lock;
2009 	dev->vbi_dev.queue = &dev->vb_vbiq;
2010 	dev->vbi_dev.queue->lock = &dev->vb_vbi_queue_lock;
2011 	strscpy(dev->vbi_dev.name, "au0828a vbi", sizeof(dev->vbi_dev.name));
2012 
2013 	/* Init entities at the Media Controller */
2014 	au0828_analog_create_entities(dev);
2015 
2016 	/* initialize videobuf2 stuff */
2017 	retval = au0828_vb2_setup(dev);
2018 	if (retval != 0) {
2019 		dprintk(1, "unable to setup videobuf2 queues (error = %d).\n",
2020 			retval);
2021 		return -ENODEV;
2022 	}
2023 
2024 	/* Register the v4l2 device */
2025 	video_set_drvdata(&dev->vdev, dev);
2026 	retval = video_register_device(&dev->vdev, VFL_TYPE_GRABBER, -1);
2027 	if (retval != 0) {
2028 		dprintk(1, "unable to register video device (error = %d).\n",
2029 			retval);
2030 		ret = -ENODEV;
2031 		goto err_reg_vdev;
2032 	}
2033 
2034 	/* Register the vbi device */
2035 	video_set_drvdata(&dev->vbi_dev, dev);
2036 	retval = video_register_device(&dev->vbi_dev, VFL_TYPE_VBI, -1);
2037 	if (retval != 0) {
2038 		dprintk(1, "unable to register vbi device (error = %d).\n",
2039 			retval);
2040 		ret = -ENODEV;
2041 		goto err_reg_vbi_dev;
2042 	}
2043 
2044 #ifdef CONFIG_MEDIA_CONTROLLER
2045 	retval = v4l2_mc_create_media_graph(dev->media_dev);
2046 	if (retval) {
2047 		pr_err("%s() au0282_dev_register failed to create graph\n",
2048 			__func__);
2049 		ret = -ENODEV;
2050 		goto err_reg_vbi_dev;
2051 	}
2052 #endif
2053 
2054 	dprintk(1, "%s completed!\n", __func__);
2055 
2056 	return 0;
2057 
2058 err_reg_vbi_dev:
2059 	video_unregister_device(&dev->vdev);
2060 err_reg_vdev:
2061 	vb2_queue_release(&dev->vb_vidq);
2062 	vb2_queue_release(&dev->vb_vbiq);
2063 	return ret;
2064 }
2065 
2066