1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Auvitek AU0828 USB Bridge (Analog video support)
4  *
5  * Copyright (C) 2009 Devin Heitmueller <dheitmueller@linuxtv.org>
6  * Copyright (C) 2005-2008 Auvitek International, Ltd.
7  */
8 
9 /* Developer Notes:
10  *
11  * The hardware scaler supported is unimplemented
12  * AC97 audio support is unimplemented (only i2s audio mode)
13  *
14  */
15 
16 #include "au0828.h"
17 #include "au8522.h"
18 
19 #include <linux/module.h>
20 #include <linux/slab.h>
21 #include <linux/init.h>
22 #include <linux/device.h>
23 #include <media/v4l2-common.h>
24 #include <media/v4l2-mc.h>
25 #include <media/v4l2-ioctl.h>
26 #include <media/v4l2-event.h>
27 #include <media/tuner.h>
28 #include "au0828-reg.h"
29 
30 static DEFINE_MUTEX(au0828_sysfs_lock);
31 
32 /* ------------------------------------------------------------------
33 	Videobuf operations
34    ------------------------------------------------------------------*/
35 
36 static unsigned int isoc_debug;
37 module_param(isoc_debug, int, 0644);
38 MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
39 
40 #define au0828_isocdbg(fmt, arg...) \
41 do {\
42 	if (isoc_debug) { \
43 		pr_info("au0828 %s :"fmt, \
44 		       __func__ , ##arg);	   \
45 	} \
46   } while (0)
47 
48 static inline void i2c_gate_ctrl(struct au0828_dev *dev, int val)
49 {
50 	if (dev->dvb.frontend && dev->dvb.frontend->ops.analog_ops.i2c_gate_ctrl)
51 		dev->dvb.frontend->ops.analog_ops.i2c_gate_ctrl(dev->dvb.frontend, val);
52 }
53 
54 static inline void print_err_status(struct au0828_dev *dev,
55 				    int packet, int status)
56 {
57 	char *errmsg = "Unknown";
58 
59 	switch (status) {
60 	case -ENOENT:
61 		errmsg = "unlinked synchronously";
62 		break;
63 	case -ECONNRESET:
64 		errmsg = "unlinked asynchronously";
65 		break;
66 	case -ENOSR:
67 		errmsg = "Buffer error (overrun)";
68 		break;
69 	case -EPIPE:
70 		errmsg = "Stalled (device not responding)";
71 		break;
72 	case -EOVERFLOW:
73 		errmsg = "Babble (bad cable?)";
74 		break;
75 	case -EPROTO:
76 		errmsg = "Bit-stuff error (bad cable?)";
77 		break;
78 	case -EILSEQ:
79 		errmsg = "CRC/Timeout (could be anything)";
80 		break;
81 	case -ETIME:
82 		errmsg = "Device does not respond";
83 		break;
84 	}
85 	if (packet < 0) {
86 		au0828_isocdbg("URB status %d [%s].\n",	status, errmsg);
87 	} else {
88 		au0828_isocdbg("URB packet %d, status %d [%s].\n",
89 			       packet, status, errmsg);
90 	}
91 }
92 
93 static int check_dev(struct au0828_dev *dev)
94 {
95 	if (test_bit(DEV_DISCONNECTED, &dev->dev_state)) {
96 		pr_info("v4l2 ioctl: device not present\n");
97 		return -ENODEV;
98 	}
99 
100 	if (test_bit(DEV_MISCONFIGURED, &dev->dev_state)) {
101 		pr_info("v4l2 ioctl: device is misconfigured; close and open it again\n");
102 		return -EIO;
103 	}
104 	return 0;
105 }
106 
107 /*
108  * IRQ callback, called by URB callback
109  */
110 static void au0828_irq_callback(struct urb *urb)
111 {
112 	struct au0828_dmaqueue  *dma_q = urb->context;
113 	struct au0828_dev *dev = container_of(dma_q, struct au0828_dev, vidq);
114 	unsigned long flags = 0;
115 	int i;
116 
117 	switch (urb->status) {
118 	case 0:             /* success */
119 	case -ETIMEDOUT:    /* NAK */
120 		break;
121 	case -ECONNRESET:   /* kill */
122 	case -ENOENT:
123 	case -ESHUTDOWN:
124 		au0828_isocdbg("au0828_irq_callback called: status kill\n");
125 		return;
126 	default:            /* unknown error */
127 		au0828_isocdbg("urb completion error %d.\n", urb->status);
128 		break;
129 	}
130 
131 	/* Copy data from URB */
132 	spin_lock_irqsave(&dev->slock, flags);
133 	dev->isoc_ctl.isoc_copy(dev, urb);
134 	spin_unlock_irqrestore(&dev->slock, flags);
135 
136 	/* Reset urb buffers */
137 	for (i = 0; i < urb->number_of_packets; i++) {
138 		urb->iso_frame_desc[i].status = 0;
139 		urb->iso_frame_desc[i].actual_length = 0;
140 	}
141 	urb->status = 0;
142 
143 	urb->status = usb_submit_urb(urb, GFP_ATOMIC);
144 	if (urb->status) {
145 		au0828_isocdbg("urb resubmit failed (error=%i)\n",
146 			       urb->status);
147 	}
148 	dev->stream_state = STREAM_ON;
149 }
150 
151 /*
152  * Stop and Deallocate URBs
153  */
154 static void au0828_uninit_isoc(struct au0828_dev *dev)
155 {
156 	struct urb *urb;
157 	int i;
158 
159 	au0828_isocdbg("au0828: called au0828_uninit_isoc\n");
160 
161 	dev->isoc_ctl.nfields = -1;
162 	for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
163 		urb = dev->isoc_ctl.urb[i];
164 		if (urb) {
165 			if (!irqs_disabled())
166 				usb_kill_urb(urb);
167 			else
168 				usb_unlink_urb(urb);
169 
170 			if (dev->isoc_ctl.transfer_buffer[i]) {
171 				usb_free_coherent(dev->usbdev,
172 					urb->transfer_buffer_length,
173 					dev->isoc_ctl.transfer_buffer[i],
174 					urb->transfer_dma);
175 			}
176 			usb_free_urb(urb);
177 			dev->isoc_ctl.urb[i] = NULL;
178 		}
179 		dev->isoc_ctl.transfer_buffer[i] = NULL;
180 	}
181 
182 	kfree(dev->isoc_ctl.urb);
183 	kfree(dev->isoc_ctl.transfer_buffer);
184 
185 	dev->isoc_ctl.urb = NULL;
186 	dev->isoc_ctl.transfer_buffer = NULL;
187 	dev->isoc_ctl.num_bufs = 0;
188 
189 	dev->stream_state = STREAM_OFF;
190 }
191 
192 /*
193  * Allocate URBs and start IRQ
194  */
195 static int au0828_init_isoc(struct au0828_dev *dev, int max_packets,
196 			    int num_bufs, int max_pkt_size,
197 			    int (*isoc_copy) (struct au0828_dev *dev, struct urb *urb))
198 {
199 	struct au0828_dmaqueue *dma_q = &dev->vidq;
200 	int i;
201 	int sb_size, pipe;
202 	struct urb *urb;
203 	int j, k;
204 	int rc;
205 
206 	au0828_isocdbg("au0828: called au0828_prepare_isoc\n");
207 
208 	dev->isoc_ctl.isoc_copy = isoc_copy;
209 	dev->isoc_ctl.num_bufs = num_bufs;
210 
211 	dev->isoc_ctl.urb = kcalloc(num_bufs, sizeof(void *),  GFP_KERNEL);
212 	if (!dev->isoc_ctl.urb) {
213 		au0828_isocdbg("cannot alloc memory for usb buffers\n");
214 		return -ENOMEM;
215 	}
216 
217 	dev->isoc_ctl.transfer_buffer = kcalloc(num_bufs, sizeof(void *),
218 						GFP_KERNEL);
219 	if (!dev->isoc_ctl.transfer_buffer) {
220 		au0828_isocdbg("cannot allocate memory for usb transfer\n");
221 		kfree(dev->isoc_ctl.urb);
222 		return -ENOMEM;
223 	}
224 
225 	dev->isoc_ctl.max_pkt_size = max_pkt_size;
226 	dev->isoc_ctl.buf = NULL;
227 
228 	sb_size = max_packets * dev->isoc_ctl.max_pkt_size;
229 
230 	/* allocate urbs and transfer buffers */
231 	for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
232 		urb = usb_alloc_urb(max_packets, GFP_KERNEL);
233 		if (!urb) {
234 			au0828_uninit_isoc(dev);
235 			return -ENOMEM;
236 		}
237 		dev->isoc_ctl.urb[i] = urb;
238 
239 		dev->isoc_ctl.transfer_buffer[i] = usb_alloc_coherent(dev->usbdev,
240 			sb_size, GFP_KERNEL, &urb->transfer_dma);
241 		if (!dev->isoc_ctl.transfer_buffer[i]) {
242 			printk("unable to allocate %i bytes for transfer buffer %i%s\n",
243 					sb_size, i,
244 					in_interrupt() ? " while in int" : "");
245 			au0828_uninit_isoc(dev);
246 			return -ENOMEM;
247 		}
248 		memset(dev->isoc_ctl.transfer_buffer[i], 0, sb_size);
249 
250 		pipe = usb_rcvisocpipe(dev->usbdev,
251 				       dev->isoc_in_endpointaddr),
252 
253 		usb_fill_int_urb(urb, dev->usbdev, pipe,
254 				 dev->isoc_ctl.transfer_buffer[i], sb_size,
255 				 au0828_irq_callback, dma_q, 1);
256 
257 		urb->number_of_packets = max_packets;
258 		urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
259 
260 		k = 0;
261 		for (j = 0; j < max_packets; j++) {
262 			urb->iso_frame_desc[j].offset = k;
263 			urb->iso_frame_desc[j].length =
264 						dev->isoc_ctl.max_pkt_size;
265 			k += dev->isoc_ctl.max_pkt_size;
266 		}
267 	}
268 
269 	/* submit urbs and enables IRQ */
270 	for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
271 		rc = usb_submit_urb(dev->isoc_ctl.urb[i], GFP_ATOMIC);
272 		if (rc) {
273 			au0828_isocdbg("submit of urb %i failed (error=%i)\n",
274 				       i, rc);
275 			au0828_uninit_isoc(dev);
276 			return rc;
277 		}
278 	}
279 
280 	return 0;
281 }
282 
283 /*
284  * Announces that a buffer were filled and request the next
285  */
286 static inline void buffer_filled(struct au0828_dev *dev,
287 				 struct au0828_dmaqueue *dma_q,
288 				 struct au0828_buffer *buf)
289 {
290 	struct vb2_v4l2_buffer *vb = &buf->vb;
291 	struct vb2_queue *q = vb->vb2_buf.vb2_queue;
292 
293 	/* Advice that buffer was filled */
294 	au0828_isocdbg("[%p/%d] wakeup\n", buf, buf->top_field);
295 
296 	if (q->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
297 		vb->sequence = dev->frame_count++;
298 	else
299 		vb->sequence = dev->vbi_frame_count++;
300 
301 	vb->field = V4L2_FIELD_INTERLACED;
302 	vb->vb2_buf.timestamp = ktime_get_ns();
303 	vb2_buffer_done(&vb->vb2_buf, VB2_BUF_STATE_DONE);
304 }
305 
306 /*
307  * Identify the buffer header type and properly handles
308  */
309 static void au0828_copy_video(struct au0828_dev *dev,
310 			      struct au0828_dmaqueue  *dma_q,
311 			      struct au0828_buffer *buf,
312 			      unsigned char *p,
313 			      unsigned char *outp, unsigned long len)
314 {
315 	void *fieldstart, *startwrite, *startread;
316 	int  linesdone, currlinedone, offset, lencopy, remain;
317 	int bytesperline = dev->width << 1; /* Assumes 16-bit depth @@@@ */
318 
319 	if (len == 0)
320 		return;
321 
322 	if (dma_q->pos + len > buf->length)
323 		len = buf->length - dma_q->pos;
324 
325 	startread = p;
326 	remain = len;
327 
328 	/* Interlaces frame */
329 	if (buf->top_field)
330 		fieldstart = outp;
331 	else
332 		fieldstart = outp + bytesperline;
333 
334 	linesdone = dma_q->pos / bytesperline;
335 	currlinedone = dma_q->pos % bytesperline;
336 	offset = linesdone * bytesperline * 2 + currlinedone;
337 	startwrite = fieldstart + offset;
338 	lencopy = bytesperline - currlinedone;
339 	lencopy = lencopy > remain ? remain : lencopy;
340 
341 	if ((char *)startwrite + lencopy > (char *)outp + buf->length) {
342 		au0828_isocdbg("Overflow of %zi bytes past buffer end (1)\n",
343 			       ((char *)startwrite + lencopy) -
344 			       ((char *)outp + buf->length));
345 		remain = (char *)outp + buf->length - (char *)startwrite;
346 		lencopy = remain;
347 	}
348 	if (lencopy <= 0)
349 		return;
350 	memcpy(startwrite, startread, lencopy);
351 
352 	remain -= lencopy;
353 
354 	while (remain > 0) {
355 		startwrite += lencopy + bytesperline;
356 		startread += lencopy;
357 		if (bytesperline > remain)
358 			lencopy = remain;
359 		else
360 			lencopy = bytesperline;
361 
362 		if ((char *)startwrite + lencopy > (char *)outp +
363 		    buf->length) {
364 			au0828_isocdbg("Overflow %zi bytes past buf end (2)\n",
365 				       ((char *)startwrite + lencopy) -
366 				       ((char *)outp + buf->length));
367 			lencopy = remain = (char *)outp + buf->length -
368 					   (char *)startwrite;
369 		}
370 		if (lencopy <= 0)
371 			break;
372 
373 		memcpy(startwrite, startread, lencopy);
374 
375 		remain -= lencopy;
376 	}
377 
378 	if (offset > 1440) {
379 		/* We have enough data to check for greenscreen */
380 		if (outp[0] < 0x60 && outp[1440] < 0x60)
381 			dev->greenscreen_detected = 1;
382 	}
383 
384 	dma_q->pos += len;
385 }
386 
387 /*
388  * video-buf generic routine to get the next available buffer
389  */
390 static inline void get_next_buf(struct au0828_dmaqueue *dma_q,
391 				struct au0828_buffer **buf)
392 {
393 	struct au0828_dev *dev = container_of(dma_q, struct au0828_dev, vidq);
394 
395 	if (list_empty(&dma_q->active)) {
396 		au0828_isocdbg("No active queue to serve\n");
397 		dev->isoc_ctl.buf = NULL;
398 		*buf = NULL;
399 		return;
400 	}
401 
402 	/* Get the next buffer */
403 	*buf = list_entry(dma_q->active.next, struct au0828_buffer, list);
404 	/* Cleans up buffer - Useful for testing for frame/URB loss */
405 	list_del(&(*buf)->list);
406 	dma_q->pos = 0;
407 	(*buf)->vb_buf = (*buf)->mem;
408 	dev->isoc_ctl.buf = *buf;
409 
410 	return;
411 }
412 
413 static void au0828_copy_vbi(struct au0828_dev *dev,
414 			      struct au0828_dmaqueue  *dma_q,
415 			      struct au0828_buffer *buf,
416 			      unsigned char *p,
417 			      unsigned char *outp, unsigned long len)
418 {
419 	unsigned char *startwrite, *startread;
420 	int bytesperline;
421 	int i, j = 0;
422 
423 	if (dev == NULL) {
424 		au0828_isocdbg("dev is null\n");
425 		return;
426 	}
427 
428 	if (dma_q == NULL) {
429 		au0828_isocdbg("dma_q is null\n");
430 		return;
431 	}
432 	if (buf == NULL)
433 		return;
434 	if (p == NULL) {
435 		au0828_isocdbg("p is null\n");
436 		return;
437 	}
438 	if (outp == NULL) {
439 		au0828_isocdbg("outp is null\n");
440 		return;
441 	}
442 
443 	bytesperline = dev->vbi_width;
444 
445 	if (dma_q->pos + len > buf->length)
446 		len = buf->length - dma_q->pos;
447 
448 	startread = p;
449 	startwrite = outp + (dma_q->pos / 2);
450 
451 	/* Make sure the bottom field populates the second half of the frame */
452 	if (buf->top_field == 0)
453 		startwrite += bytesperline * dev->vbi_height;
454 
455 	for (i = 0; i < len; i += 2)
456 		startwrite[j++] = startread[i+1];
457 
458 	dma_q->pos += len;
459 }
460 
461 
462 /*
463  * video-buf generic routine to get the next available VBI buffer
464  */
465 static inline void vbi_get_next_buf(struct au0828_dmaqueue *dma_q,
466 				    struct au0828_buffer **buf)
467 {
468 	struct au0828_dev *dev = container_of(dma_q, struct au0828_dev, vbiq);
469 
470 	if (list_empty(&dma_q->active)) {
471 		au0828_isocdbg("No active queue to serve\n");
472 		dev->isoc_ctl.vbi_buf = NULL;
473 		*buf = NULL;
474 		return;
475 	}
476 
477 	/* Get the next buffer */
478 	*buf = list_entry(dma_q->active.next, struct au0828_buffer, list);
479 	/* Cleans up buffer - Useful for testing for frame/URB loss */
480 	list_del(&(*buf)->list);
481 	dma_q->pos = 0;
482 	(*buf)->vb_buf = (*buf)->mem;
483 	dev->isoc_ctl.vbi_buf = *buf;
484 	return;
485 }
486 
487 /*
488  * Controls the isoc copy of each urb packet
489  */
490 static inline int au0828_isoc_copy(struct au0828_dev *dev, struct urb *urb)
491 {
492 	struct au0828_buffer    *buf;
493 	struct au0828_buffer    *vbi_buf;
494 	struct au0828_dmaqueue  *dma_q = urb->context;
495 	struct au0828_dmaqueue  *vbi_dma_q = &dev->vbiq;
496 	unsigned char *outp = NULL;
497 	unsigned char *vbioutp = NULL;
498 	int i, len = 0, rc = 1;
499 	unsigned char *p;
500 	unsigned char fbyte;
501 	unsigned int vbi_field_size;
502 	unsigned int remain, lencopy;
503 
504 	if (!dev)
505 		return 0;
506 
507 	if (test_bit(DEV_DISCONNECTED, &dev->dev_state) ||
508 	    test_bit(DEV_MISCONFIGURED, &dev->dev_state))
509 		return 0;
510 
511 	if (urb->status < 0) {
512 		print_err_status(dev, -1, urb->status);
513 		if (urb->status == -ENOENT)
514 			return 0;
515 	}
516 
517 	buf = dev->isoc_ctl.buf;
518 	if (buf != NULL)
519 		outp = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
520 
521 	vbi_buf = dev->isoc_ctl.vbi_buf;
522 	if (vbi_buf != NULL)
523 		vbioutp = vb2_plane_vaddr(&vbi_buf->vb.vb2_buf, 0);
524 
525 	for (i = 0; i < urb->number_of_packets; i++) {
526 		int status = urb->iso_frame_desc[i].status;
527 
528 		if (status < 0) {
529 			print_err_status(dev, i, status);
530 			if (urb->iso_frame_desc[i].status != -EPROTO)
531 				continue;
532 		}
533 
534 		if (urb->iso_frame_desc[i].actual_length <= 0)
535 			continue;
536 
537 		if (urb->iso_frame_desc[i].actual_length >
538 						dev->max_pkt_size) {
539 			au0828_isocdbg("packet bigger than packet size");
540 			continue;
541 		}
542 
543 		p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
544 		fbyte = p[0];
545 		len = urb->iso_frame_desc[i].actual_length - 4;
546 		p += 4;
547 
548 		if (fbyte & 0x80) {
549 			len -= 4;
550 			p += 4;
551 			au0828_isocdbg("Video frame %s\n",
552 				       (fbyte & 0x40) ? "odd" : "even");
553 			if (fbyte & 0x40) {
554 				/* VBI */
555 				if (vbi_buf != NULL)
556 					buffer_filled(dev, vbi_dma_q, vbi_buf);
557 				vbi_get_next_buf(vbi_dma_q, &vbi_buf);
558 				if (vbi_buf == NULL)
559 					vbioutp = NULL;
560 				else
561 					vbioutp = vb2_plane_vaddr(
562 						&vbi_buf->vb.vb2_buf, 0);
563 
564 				/* Video */
565 				if (buf != NULL)
566 					buffer_filled(dev, dma_q, buf);
567 				get_next_buf(dma_q, &buf);
568 				if (buf == NULL)
569 					outp = NULL;
570 				else
571 					outp = vb2_plane_vaddr(
572 						&buf->vb.vb2_buf, 0);
573 
574 				/* As long as isoc traffic is arriving, keep
575 				   resetting the timer */
576 				if (dev->vid_timeout_running)
577 					mod_timer(&dev->vid_timeout,
578 						  jiffies + (HZ / 10));
579 				if (dev->vbi_timeout_running)
580 					mod_timer(&dev->vbi_timeout,
581 						  jiffies + (HZ / 10));
582 			}
583 
584 			if (buf != NULL) {
585 				if (fbyte & 0x40)
586 					buf->top_field = 1;
587 				else
588 					buf->top_field = 0;
589 			}
590 
591 			if (vbi_buf != NULL) {
592 				if (fbyte & 0x40)
593 					vbi_buf->top_field = 1;
594 				else
595 					vbi_buf->top_field = 0;
596 			}
597 
598 			dev->vbi_read = 0;
599 			vbi_dma_q->pos = 0;
600 			dma_q->pos = 0;
601 		}
602 
603 		vbi_field_size = dev->vbi_width * dev->vbi_height * 2;
604 		if (dev->vbi_read < vbi_field_size) {
605 			remain  = vbi_field_size - dev->vbi_read;
606 			if (len < remain)
607 				lencopy = len;
608 			else
609 				lencopy = remain;
610 
611 			if (vbi_buf != NULL)
612 				au0828_copy_vbi(dev, vbi_dma_q, vbi_buf, p,
613 						vbioutp, len);
614 
615 			len -= lencopy;
616 			p += lencopy;
617 			dev->vbi_read += lencopy;
618 		}
619 
620 		if (dev->vbi_read >= vbi_field_size && buf != NULL)
621 			au0828_copy_video(dev, dma_q, buf, p, outp, len);
622 	}
623 	return rc;
624 }
625 
626 void au0828_usb_v4l2_media_release(struct au0828_dev *dev)
627 {
628 #ifdef CONFIG_MEDIA_CONTROLLER
629 	int i;
630 
631 	for (i = 0; i < AU0828_MAX_INPUT; i++) {
632 		if (AUVI_INPUT(i).type == AU0828_VMUX_UNDEFINED)
633 			return;
634 		media_device_unregister_entity(&dev->input_ent[i]);
635 	}
636 #endif
637 }
638 
639 static void au0828_usb_v4l2_release(struct v4l2_device *v4l2_dev)
640 {
641 	struct au0828_dev *dev =
642 		container_of(v4l2_dev, struct au0828_dev, v4l2_dev);
643 
644 	v4l2_ctrl_handler_free(&dev->v4l2_ctrl_hdl);
645 	v4l2_device_unregister(&dev->v4l2_dev);
646 	au0828_usb_v4l2_media_release(dev);
647 	au0828_usb_release(dev);
648 }
649 
650 int au0828_v4l2_device_register(struct usb_interface *interface,
651 				struct au0828_dev *dev)
652 {
653 	int retval;
654 
655 	if (AUVI_INPUT(0).type == AU0828_VMUX_UNDEFINED)
656 		return 0;
657 
658 	/* Create the v4l2_device */
659 #ifdef CONFIG_MEDIA_CONTROLLER
660 	dev->v4l2_dev.mdev = dev->media_dev;
661 #endif
662 	retval = v4l2_device_register(&interface->dev, &dev->v4l2_dev);
663 	if (retval) {
664 		pr_err("%s() v4l2_device_register failed\n",
665 		       __func__);
666 		return retval;
667 	}
668 
669 	dev->v4l2_dev.release = au0828_usb_v4l2_release;
670 
671 	/* This control handler will inherit the controls from au8522 */
672 	retval = v4l2_ctrl_handler_init(&dev->v4l2_ctrl_hdl, 4);
673 	if (retval) {
674 		pr_err("%s() v4l2_ctrl_handler_init failed\n",
675 		       __func__);
676 		return retval;
677 	}
678 	dev->v4l2_dev.ctrl_handler = &dev->v4l2_ctrl_hdl;
679 
680 	return 0;
681 }
682 
683 static int queue_setup(struct vb2_queue *vq,
684 		       unsigned int *nbuffers, unsigned int *nplanes,
685 		       unsigned int sizes[], struct device *alloc_devs[])
686 {
687 	struct au0828_dev *dev = vb2_get_drv_priv(vq);
688 	unsigned long size = dev->height * dev->bytesperline;
689 
690 	if (*nplanes)
691 		return sizes[0] < size ? -EINVAL : 0;
692 	*nplanes = 1;
693 	sizes[0] = size;
694 	return 0;
695 }
696 
697 static int
698 buffer_prepare(struct vb2_buffer *vb)
699 {
700 	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
701 	struct au0828_buffer *buf = container_of(vbuf,
702 				struct au0828_buffer, vb);
703 	struct au0828_dev    *dev = vb2_get_drv_priv(vb->vb2_queue);
704 
705 	buf->length = dev->height * dev->bytesperline;
706 
707 	if (vb2_plane_size(vb, 0) < buf->length) {
708 		pr_err("%s data will not fit into plane (%lu < %lu)\n",
709 			__func__, vb2_plane_size(vb, 0), buf->length);
710 		return -EINVAL;
711 	}
712 	vb2_set_plane_payload(&buf->vb.vb2_buf, 0, buf->length);
713 	return 0;
714 }
715 
716 static void
717 buffer_queue(struct vb2_buffer *vb)
718 {
719 	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
720 	struct au0828_buffer    *buf     = container_of(vbuf,
721 							struct au0828_buffer,
722 							vb);
723 	struct au0828_dev       *dev     = vb2_get_drv_priv(vb->vb2_queue);
724 	struct au0828_dmaqueue  *vidq    = &dev->vidq;
725 	unsigned long flags = 0;
726 
727 	buf->mem = vb2_plane_vaddr(vb, 0);
728 	buf->length = vb2_plane_size(vb, 0);
729 
730 	spin_lock_irqsave(&dev->slock, flags);
731 	list_add_tail(&buf->list, &vidq->active);
732 	spin_unlock_irqrestore(&dev->slock, flags);
733 }
734 
735 static int au0828_i2s_init(struct au0828_dev *dev)
736 {
737 	/* Enable i2s mode */
738 	au0828_writereg(dev, AU0828_AUDIOCTRL_50C, 0x01);
739 	return 0;
740 }
741 
742 /*
743  * Auvitek au0828 analog stream enable
744  */
745 static int au0828_analog_stream_enable(struct au0828_dev *d)
746 {
747 	struct usb_interface *iface;
748 	int ret, h, w;
749 
750 	dprintk(1, "au0828_analog_stream_enable called\n");
751 
752 	if (test_bit(DEV_DISCONNECTED, &d->dev_state))
753 		return -ENODEV;
754 
755 	iface = usb_ifnum_to_if(d->usbdev, 0);
756 	if (iface && iface->cur_altsetting->desc.bAlternateSetting != 5) {
757 		dprintk(1, "Changing intf#0 to alt 5\n");
758 		/* set au0828 interface0 to AS5 here again */
759 		ret = usb_set_interface(d->usbdev, 0, 5);
760 		if (ret < 0) {
761 			pr_info("Au0828 can't set alt setting to 5!\n");
762 			return -EBUSY;
763 		}
764 	}
765 
766 	h = d->height / 2 + 2;
767 	w = d->width * 2;
768 
769 	au0828_writereg(d, AU0828_SENSORCTRL_VBI_103, 0x00);
770 	au0828_writereg(d, 0x106, 0x00);
771 	/* set x position */
772 	au0828_writereg(d, 0x110, 0x00);
773 	au0828_writereg(d, 0x111, 0x00);
774 	au0828_writereg(d, 0x114, w & 0xff);
775 	au0828_writereg(d, 0x115, w >> 8);
776 	/* set y position */
777 	au0828_writereg(d, 0x112, 0x00);
778 	au0828_writereg(d, 0x113, 0x00);
779 	au0828_writereg(d, 0x116, h & 0xff);
780 	au0828_writereg(d, 0x117, h >> 8);
781 	au0828_writereg(d, AU0828_SENSORCTRL_100, 0xb3);
782 
783 	return 0;
784 }
785 
786 static int au0828_analog_stream_disable(struct au0828_dev *d)
787 {
788 	dprintk(1, "au0828_analog_stream_disable called\n");
789 	au0828_writereg(d, AU0828_SENSORCTRL_100, 0x0);
790 	return 0;
791 }
792 
793 static void au0828_analog_stream_reset(struct au0828_dev *dev)
794 {
795 	dprintk(1, "au0828_analog_stream_reset called\n");
796 	au0828_writereg(dev, AU0828_SENSORCTRL_100, 0x0);
797 	mdelay(30);
798 	au0828_writereg(dev, AU0828_SENSORCTRL_100, 0xb3);
799 }
800 
801 /*
802  * Some operations needs to stop current streaming
803  */
804 static int au0828_stream_interrupt(struct au0828_dev *dev)
805 {
806 	dev->stream_state = STREAM_INTERRUPT;
807 	if (test_bit(DEV_DISCONNECTED, &dev->dev_state))
808 		return -ENODEV;
809 	return 0;
810 }
811 
812 int au0828_start_analog_streaming(struct vb2_queue *vq, unsigned int count)
813 {
814 	struct au0828_dev *dev = vb2_get_drv_priv(vq);
815 	int rc = 0;
816 
817 	dprintk(1, "au0828_start_analog_streaming called %d\n",
818 		dev->streaming_users);
819 
820 	if (vq->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
821 		dev->frame_count = 0;
822 	else
823 		dev->vbi_frame_count = 0;
824 
825 	if (dev->streaming_users == 0) {
826 		/* If we were doing ac97 instead of i2s, it would go here...*/
827 		au0828_i2s_init(dev);
828 		rc = au0828_init_isoc(dev, AU0828_ISO_PACKETS_PER_URB,
829 				   AU0828_MAX_ISO_BUFS, dev->max_pkt_size,
830 				   au0828_isoc_copy);
831 		if (rc < 0) {
832 			pr_info("au0828_init_isoc failed\n");
833 			return rc;
834 		}
835 
836 		v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 1);
837 
838 		if (vq->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
839 			dev->vid_timeout_running = 1;
840 			mod_timer(&dev->vid_timeout, jiffies + (HZ / 10));
841 		} else if (vq->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
842 			dev->vbi_timeout_running = 1;
843 			mod_timer(&dev->vbi_timeout, jiffies + (HZ / 10));
844 		}
845 	}
846 	dev->streaming_users++;
847 	return rc;
848 }
849 
850 static void au0828_stop_streaming(struct vb2_queue *vq)
851 {
852 	struct au0828_dev *dev = vb2_get_drv_priv(vq);
853 	struct au0828_dmaqueue *vidq = &dev->vidq;
854 	unsigned long flags = 0;
855 
856 	dprintk(1, "au0828_stop_streaming called %d\n", dev->streaming_users);
857 
858 	if (dev->streaming_users-- == 1) {
859 		au0828_uninit_isoc(dev);
860 		v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 0);
861 	}
862 
863 	dev->vid_timeout_running = 0;
864 	del_timer_sync(&dev->vid_timeout);
865 
866 	spin_lock_irqsave(&dev->slock, flags);
867 	if (dev->isoc_ctl.buf != NULL) {
868 		vb2_buffer_done(&dev->isoc_ctl.buf->vb.vb2_buf,
869 				VB2_BUF_STATE_ERROR);
870 		dev->isoc_ctl.buf = NULL;
871 	}
872 	while (!list_empty(&vidq->active)) {
873 		struct au0828_buffer *buf;
874 
875 		buf = list_entry(vidq->active.next, struct au0828_buffer, list);
876 		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
877 		list_del(&buf->list);
878 	}
879 	spin_unlock_irqrestore(&dev->slock, flags);
880 }
881 
882 void au0828_stop_vbi_streaming(struct vb2_queue *vq)
883 {
884 	struct au0828_dev *dev = vb2_get_drv_priv(vq);
885 	struct au0828_dmaqueue *vbiq = &dev->vbiq;
886 	unsigned long flags = 0;
887 
888 	dprintk(1, "au0828_stop_vbi_streaming called %d\n",
889 		dev->streaming_users);
890 
891 	if (dev->streaming_users-- == 1) {
892 		au0828_uninit_isoc(dev);
893 		v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 0);
894 	}
895 
896 	spin_lock_irqsave(&dev->slock, flags);
897 	if (dev->isoc_ctl.vbi_buf != NULL) {
898 		vb2_buffer_done(&dev->isoc_ctl.vbi_buf->vb.vb2_buf,
899 				VB2_BUF_STATE_ERROR);
900 		dev->isoc_ctl.vbi_buf = NULL;
901 	}
902 	while (!list_empty(&vbiq->active)) {
903 		struct au0828_buffer *buf;
904 
905 		buf = list_entry(vbiq->active.next, struct au0828_buffer, list);
906 		list_del(&buf->list);
907 		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
908 	}
909 	spin_unlock_irqrestore(&dev->slock, flags);
910 
911 	dev->vbi_timeout_running = 0;
912 	del_timer_sync(&dev->vbi_timeout);
913 }
914 
915 static const struct vb2_ops au0828_video_qops = {
916 	.queue_setup     = queue_setup,
917 	.buf_prepare     = buffer_prepare,
918 	.buf_queue       = buffer_queue,
919 	.start_streaming = au0828_start_analog_streaming,
920 	.stop_streaming  = au0828_stop_streaming,
921 	.wait_prepare    = vb2_ops_wait_prepare,
922 	.wait_finish     = vb2_ops_wait_finish,
923 };
924 
925 /* ------------------------------------------------------------------
926    V4L2 interface
927    ------------------------------------------------------------------*/
928 /*
929  * au0828_analog_unregister
930  * unregister v4l2 devices
931  */
932 int au0828_analog_unregister(struct au0828_dev *dev)
933 {
934 	dprintk(1, "au0828_analog_unregister called\n");
935 
936 	/* No analog TV */
937 	if (AUVI_INPUT(0).type == AU0828_VMUX_UNDEFINED)
938 		return 0;
939 
940 	mutex_lock(&au0828_sysfs_lock);
941 	vb2_video_unregister_device(&dev->vdev);
942 	vb2_video_unregister_device(&dev->vbi_dev);
943 	mutex_unlock(&au0828_sysfs_lock);
944 
945 	v4l2_device_disconnect(&dev->v4l2_dev);
946 	v4l2_device_put(&dev->v4l2_dev);
947 
948 	return 1;
949 }
950 
951 /* This function ensures that video frames continue to be delivered even if
952    the ITU-656 input isn't receiving any data (thereby preventing applications
953    such as tvtime from hanging) */
954 static void au0828_vid_buffer_timeout(struct timer_list *t)
955 {
956 	struct au0828_dev *dev = from_timer(dev, t, vid_timeout);
957 	struct au0828_dmaqueue *dma_q = &dev->vidq;
958 	struct au0828_buffer *buf;
959 	unsigned char *vid_data;
960 	unsigned long flags = 0;
961 
962 	spin_lock_irqsave(&dev->slock, flags);
963 
964 	buf = dev->isoc_ctl.buf;
965 	if (buf != NULL) {
966 		vid_data = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
967 		memset(vid_data, 0x00, buf->length); /* Blank green frame */
968 		buffer_filled(dev, dma_q, buf);
969 	}
970 	get_next_buf(dma_q, &buf);
971 
972 	if (dev->vid_timeout_running == 1)
973 		mod_timer(&dev->vid_timeout, jiffies + (HZ / 10));
974 
975 	spin_unlock_irqrestore(&dev->slock, flags);
976 }
977 
978 static void au0828_vbi_buffer_timeout(struct timer_list *t)
979 {
980 	struct au0828_dev *dev = from_timer(dev, t, vbi_timeout);
981 	struct au0828_dmaqueue *dma_q = &dev->vbiq;
982 	struct au0828_buffer *buf;
983 	unsigned char *vbi_data;
984 	unsigned long flags = 0;
985 
986 	spin_lock_irqsave(&dev->slock, flags);
987 
988 	buf = dev->isoc_ctl.vbi_buf;
989 	if (buf != NULL) {
990 		vbi_data = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
991 		memset(vbi_data, 0x00, buf->length);
992 		buffer_filled(dev, dma_q, buf);
993 	}
994 	vbi_get_next_buf(dma_q, &buf);
995 
996 	if (dev->vbi_timeout_running == 1)
997 		mod_timer(&dev->vbi_timeout, jiffies + (HZ / 10));
998 	spin_unlock_irqrestore(&dev->slock, flags);
999 }
1000 
1001 static int au0828_v4l2_open(struct file *filp)
1002 {
1003 	struct au0828_dev *dev = video_drvdata(filp);
1004 	int ret;
1005 
1006 	dprintk(1,
1007 		"%s called std_set %d dev_state %ld stream users %d users %d\n",
1008 		__func__, dev->std_set_in_tuner_core, dev->dev_state,
1009 		dev->streaming_users, dev->users);
1010 
1011 	if (mutex_lock_interruptible(&dev->lock))
1012 		return -ERESTARTSYS;
1013 
1014 	ret = v4l2_fh_open(filp);
1015 	if (ret) {
1016 		au0828_isocdbg("%s: v4l2_fh_open() returned error %d\n",
1017 				__func__, ret);
1018 		mutex_unlock(&dev->lock);
1019 		return ret;
1020 	}
1021 
1022 	if (dev->users == 0) {
1023 		au0828_analog_stream_enable(dev);
1024 		au0828_analog_stream_reset(dev);
1025 		dev->stream_state = STREAM_OFF;
1026 		set_bit(DEV_INITIALIZED, &dev->dev_state);
1027 	}
1028 	dev->users++;
1029 	mutex_unlock(&dev->lock);
1030 	return ret;
1031 }
1032 
1033 static int au0828_v4l2_close(struct file *filp)
1034 {
1035 	int ret;
1036 	struct au0828_dev *dev = video_drvdata(filp);
1037 	struct video_device *vdev = video_devdata(filp);
1038 
1039 	dprintk(1,
1040 		"%s called std_set %d dev_state %ld stream users %d users %d\n",
1041 		__func__, dev->std_set_in_tuner_core, dev->dev_state,
1042 		dev->streaming_users, dev->users);
1043 
1044 	mutex_lock(&dev->lock);
1045 	if (vdev->vfl_type == VFL_TYPE_VIDEO && dev->vid_timeout_running) {
1046 		/* Cancel timeout thread in case they didn't call streamoff */
1047 		dev->vid_timeout_running = 0;
1048 		del_timer_sync(&dev->vid_timeout);
1049 	} else if (vdev->vfl_type == VFL_TYPE_VBI &&
1050 			dev->vbi_timeout_running) {
1051 		/* Cancel timeout thread in case they didn't call streamoff */
1052 		dev->vbi_timeout_running = 0;
1053 		del_timer_sync(&dev->vbi_timeout);
1054 	}
1055 
1056 	if (test_bit(DEV_DISCONNECTED, &dev->dev_state))
1057 		goto end;
1058 
1059 	if (dev->users == 1) {
1060 		/*
1061 		 * Avoid putting tuner in sleep if DVB or ALSA are
1062 		 * streaming.
1063 		 *
1064 		 * On most USB devices  like au0828 the tuner can
1065 		 * be safely put in sleep state here if ALSA isn't
1066 		 * streaming. Exceptions are some very old USB tuner
1067 		 * models such as em28xx-based WinTV USB2 which have
1068 		 * a separate audio output jack. The devices that have
1069 		 * a separate audio output jack have analog tuners,
1070 		 * like Philips FM1236. Those devices are always on,
1071 		 * so the s_power callback are silently ignored.
1072 		 * So, the current logic here does the following:
1073 		 * Disable (put tuner to sleep) when
1074 		 * - ALSA and DVB aren't streaming.
1075 		 * - the last V4L2 file handler is closed.
1076 		 *
1077 		 * FIXME:
1078 		 *
1079 		 * Additionally, this logic could be improved to
1080 		 * disable the media source if the above conditions
1081 		 * are met and if the device:
1082 		 * - doesn't have a separate audio out plug (or
1083 		 * - doesn't use a silicon tuner like xc2028/3028/4000/5000).
1084 		 *
1085 		 * Once this additional logic is in place, a callback
1086 		 * is needed to enable the media source and power on
1087 		 * the tuner, for radio to work.
1088 		*/
1089 		ret = v4l_enable_media_source(vdev);
1090 		if (ret == 0)
1091 			v4l2_device_call_all(&dev->v4l2_dev, 0, tuner,
1092 					     standby);
1093 		dev->std_set_in_tuner_core = 0;
1094 
1095 		/* When close the device, set the usb intf0 into alt0 to free
1096 		   USB bandwidth */
1097 		ret = usb_set_interface(dev->usbdev, 0, 0);
1098 		if (ret < 0)
1099 			pr_info("Au0828 can't set alternate to 0!\n");
1100 	}
1101 end:
1102 	_vb2_fop_release(filp, NULL);
1103 	dev->users--;
1104 	mutex_unlock(&dev->lock);
1105 	return 0;
1106 }
1107 
1108 /* Must be called with dev->lock held */
1109 static void au0828_init_tuner(struct au0828_dev *dev)
1110 {
1111 	struct v4l2_frequency f = {
1112 		.frequency = dev->ctrl_freq,
1113 		.type = V4L2_TUNER_ANALOG_TV,
1114 	};
1115 
1116 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1117 		dev->std_set_in_tuner_core, dev->dev_state);
1118 
1119 	if (dev->std_set_in_tuner_core)
1120 		return;
1121 	dev->std_set_in_tuner_core = 1;
1122 	i2c_gate_ctrl(dev, 1);
1123 	/* If we've never sent the standard in tuner core, do so now.
1124 	   We don't do this at device probe because we don't want to
1125 	   incur the cost of a firmware load */
1126 	v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_std, dev->std);
1127 	v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, &f);
1128 	i2c_gate_ctrl(dev, 0);
1129 }
1130 
1131 static int au0828_set_format(struct au0828_dev *dev, unsigned int cmd,
1132 			     struct v4l2_format *format)
1133 {
1134 	int ret;
1135 	int width = format->fmt.pix.width;
1136 	int height = format->fmt.pix.height;
1137 
1138 	/* If they are demanding a format other than the one we support,
1139 	   bail out (tvtime asks for UYVY and then retries with YUYV) */
1140 	if (format->fmt.pix.pixelformat != V4L2_PIX_FMT_UYVY)
1141 		return -EINVAL;
1142 
1143 	/* format->fmt.pix.width only support 720 and height 480 */
1144 	if (width != 720)
1145 		width = 720;
1146 	if (height != 480)
1147 		height = 480;
1148 
1149 	format->fmt.pix.width = width;
1150 	format->fmt.pix.height = height;
1151 	format->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY;
1152 	format->fmt.pix.bytesperline = width * 2;
1153 	format->fmt.pix.sizeimage = width * height * 2;
1154 	format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1155 	format->fmt.pix.field = V4L2_FIELD_INTERLACED;
1156 
1157 	if (cmd == VIDIOC_TRY_FMT)
1158 		return 0;
1159 
1160 	/* maybe set new image format, driver current only support 720*480 */
1161 	dev->width = width;
1162 	dev->height = height;
1163 	dev->frame_size = width * height * 2;
1164 	dev->field_size = width * height;
1165 	dev->bytesperline = width * 2;
1166 
1167 	if (dev->stream_state == STREAM_ON) {
1168 		dprintk(1, "VIDIOC_SET_FMT: interrupting stream!\n");
1169 		ret = au0828_stream_interrupt(dev);
1170 		if (ret != 0) {
1171 			dprintk(1, "error interrupting video stream!\n");
1172 			return ret;
1173 		}
1174 	}
1175 
1176 	au0828_analog_stream_enable(dev);
1177 
1178 	return 0;
1179 }
1180 
1181 static int vidioc_querycap(struct file *file, void  *priv,
1182 			   struct v4l2_capability *cap)
1183 {
1184 	struct au0828_dev *dev = video_drvdata(file);
1185 
1186 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1187 		dev->std_set_in_tuner_core, dev->dev_state);
1188 
1189 	strscpy(cap->driver, "au0828", sizeof(cap->driver));
1190 	strscpy(cap->card, dev->board.name, sizeof(cap->card));
1191 	usb_make_path(dev->usbdev, cap->bus_info, sizeof(cap->bus_info));
1192 
1193 	/* set the device capabilities */
1194 	cap->capabilities =
1195 		V4L2_CAP_AUDIO | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING |
1196 		V4L2_CAP_TUNER | V4L2_CAP_VBI_CAPTURE | V4L2_CAP_VIDEO_CAPTURE |
1197 		V4L2_CAP_DEVICE_CAPS;
1198 	return 0;
1199 }
1200 
1201 static int vidioc_enum_fmt_vid_cap(struct file *file, void  *priv,
1202 					struct v4l2_fmtdesc *f)
1203 {
1204 	if (f->index)
1205 		return -EINVAL;
1206 
1207 	dprintk(1, "%s called\n", __func__);
1208 
1209 	f->pixelformat = V4L2_PIX_FMT_UYVY;
1210 
1211 	return 0;
1212 }
1213 
1214 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
1215 					struct v4l2_format *f)
1216 {
1217 	struct au0828_dev *dev = video_drvdata(file);
1218 
1219 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1220 		dev->std_set_in_tuner_core, dev->dev_state);
1221 
1222 	f->fmt.pix.width = dev->width;
1223 	f->fmt.pix.height = dev->height;
1224 	f->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY;
1225 	f->fmt.pix.bytesperline = dev->bytesperline;
1226 	f->fmt.pix.sizeimage = dev->frame_size;
1227 	f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; /* NTSC/PAL */
1228 	f->fmt.pix.field = V4L2_FIELD_INTERLACED;
1229 	return 0;
1230 }
1231 
1232 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
1233 				  struct v4l2_format *f)
1234 {
1235 	struct au0828_dev *dev = video_drvdata(file);
1236 
1237 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1238 		dev->std_set_in_tuner_core, dev->dev_state);
1239 
1240 	return au0828_set_format(dev, VIDIOC_TRY_FMT, f);
1241 }
1242 
1243 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1244 				struct v4l2_format *f)
1245 {
1246 	struct au0828_dev *dev = video_drvdata(file);
1247 	int rc;
1248 
1249 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1250 		dev->std_set_in_tuner_core, dev->dev_state);
1251 
1252 	rc = check_dev(dev);
1253 	if (rc < 0)
1254 		return rc;
1255 
1256 	if (vb2_is_busy(&dev->vb_vidq)) {
1257 		pr_info("%s queue busy\n", __func__);
1258 		rc = -EBUSY;
1259 		goto out;
1260 	}
1261 
1262 	rc = au0828_set_format(dev, VIDIOC_S_FMT, f);
1263 out:
1264 	return rc;
1265 }
1266 
1267 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm)
1268 {
1269 	struct au0828_dev *dev = video_drvdata(file);
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 	if (norm == dev->std)
1275 		return 0;
1276 
1277 	if (dev->streaming_users > 0)
1278 		return -EBUSY;
1279 
1280 	dev->std = norm;
1281 
1282 	au0828_init_tuner(dev);
1283 
1284 	i2c_gate_ctrl(dev, 1);
1285 
1286 	/*
1287 	 * FIXME: when we support something other than 60Hz standards,
1288 	 * we are going to have to make the au0828 bridge adjust the size
1289 	 * of its capture buffer, which is currently hardcoded at 720x480
1290 	 */
1291 
1292 	v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_std, norm);
1293 
1294 	i2c_gate_ctrl(dev, 0);
1295 
1296 	return 0;
1297 }
1298 
1299 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm)
1300 {
1301 	struct au0828_dev *dev = video_drvdata(file);
1302 
1303 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1304 		dev->std_set_in_tuner_core, dev->dev_state);
1305 
1306 	*norm = dev->std;
1307 	return 0;
1308 }
1309 
1310 static int vidioc_enum_input(struct file *file, void *priv,
1311 				struct v4l2_input *input)
1312 {
1313 	struct au0828_dev *dev = video_drvdata(file);
1314 	unsigned int tmp;
1315 
1316 	static const char *inames[] = {
1317 		[AU0828_VMUX_UNDEFINED] = "Undefined",
1318 		[AU0828_VMUX_COMPOSITE] = "Composite",
1319 		[AU0828_VMUX_SVIDEO] = "S-Video",
1320 		[AU0828_VMUX_CABLE] = "Cable TV",
1321 		[AU0828_VMUX_TELEVISION] = "Television",
1322 		[AU0828_VMUX_DVB] = "DVB",
1323 	};
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 	tmp = input->index;
1329 
1330 	if (tmp >= AU0828_MAX_INPUT)
1331 		return -EINVAL;
1332 	if (AUVI_INPUT(tmp).type == 0)
1333 		return -EINVAL;
1334 
1335 	input->index = tmp;
1336 	strscpy(input->name, inames[AUVI_INPUT(tmp).type], sizeof(input->name));
1337 	if ((AUVI_INPUT(tmp).type == AU0828_VMUX_TELEVISION) ||
1338 	    (AUVI_INPUT(tmp).type == AU0828_VMUX_CABLE)) {
1339 		input->type |= V4L2_INPUT_TYPE_TUNER;
1340 		input->audioset = 1;
1341 	} else {
1342 		input->type |= V4L2_INPUT_TYPE_CAMERA;
1343 		input->audioset = 2;
1344 	}
1345 
1346 	input->std = dev->vdev.tvnorms;
1347 
1348 	return 0;
1349 }
1350 
1351 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1352 {
1353 	struct au0828_dev *dev = video_drvdata(file);
1354 
1355 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1356 		dev->std_set_in_tuner_core, dev->dev_state);
1357 
1358 	*i = dev->ctrl_input;
1359 	return 0;
1360 }
1361 
1362 static void au0828_s_input(struct au0828_dev *dev, int index)
1363 {
1364 	int i;
1365 
1366 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1367 		dev->std_set_in_tuner_core, dev->dev_state);
1368 
1369 	switch (AUVI_INPUT(index).type) {
1370 	case AU0828_VMUX_SVIDEO:
1371 		dev->input_type = AU0828_VMUX_SVIDEO;
1372 		dev->ctrl_ainput = 1;
1373 		break;
1374 	case AU0828_VMUX_COMPOSITE:
1375 		dev->input_type = AU0828_VMUX_COMPOSITE;
1376 		dev->ctrl_ainput = 1;
1377 		break;
1378 	case AU0828_VMUX_TELEVISION:
1379 		dev->input_type = AU0828_VMUX_TELEVISION;
1380 		dev->ctrl_ainput = 0;
1381 		break;
1382 	default:
1383 		dprintk(1, "unknown input type set [%d]\n",
1384 			AUVI_INPUT(index).type);
1385 		return;
1386 	}
1387 
1388 	dev->ctrl_input = index;
1389 
1390 	v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_routing,
1391 			AUVI_INPUT(index).vmux, 0, 0);
1392 
1393 	for (i = 0; i < AU0828_MAX_INPUT; i++) {
1394 		int enable = 0;
1395 		if (AUVI_INPUT(i).audio_setup == NULL)
1396 			continue;
1397 
1398 		if (i == index)
1399 			enable = 1;
1400 		else
1401 			enable = 0;
1402 		if (enable) {
1403 			(AUVI_INPUT(i).audio_setup)(dev, enable);
1404 		} else {
1405 			/* Make sure we leave it turned on if some
1406 			   other input is routed to this callback */
1407 			if ((AUVI_INPUT(i).audio_setup) !=
1408 			    ((AUVI_INPUT(index).audio_setup))) {
1409 				(AUVI_INPUT(i).audio_setup)(dev, enable);
1410 			}
1411 		}
1412 	}
1413 
1414 	v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing,
1415 			AUVI_INPUT(index).amux, 0, 0);
1416 }
1417 
1418 static int vidioc_s_input(struct file *file, void *priv, unsigned int index)
1419 {
1420 	struct au0828_dev *dev = video_drvdata(file);
1421 	struct video_device *vfd = video_devdata(file);
1422 
1423 	dprintk(1, "VIDIOC_S_INPUT in function %s, input=%d\n", __func__,
1424 		index);
1425 	if (index >= AU0828_MAX_INPUT)
1426 		return -EINVAL;
1427 	if (AUVI_INPUT(index).type == 0)
1428 		return -EINVAL;
1429 
1430 	if (dev->ctrl_input == index)
1431 		return 0;
1432 
1433 	au0828_s_input(dev, index);
1434 
1435 	/*
1436 	 * Input has been changed. Disable the media source
1437 	 * associated with the old input and enable source
1438 	 * for the newly set input
1439 	 */
1440 	v4l_disable_media_source(vfd);
1441 	return v4l_enable_media_source(vfd);
1442 }
1443 
1444 static int vidioc_enumaudio(struct file *file, void *priv, struct v4l2_audio *a)
1445 {
1446 	if (a->index > 1)
1447 		return -EINVAL;
1448 
1449 	dprintk(1, "%s called\n", __func__);
1450 
1451 	if (a->index == 0)
1452 		strscpy(a->name, "Television", sizeof(a->name));
1453 	else
1454 		strscpy(a->name, "Line in", sizeof(a->name));
1455 
1456 	a->capability = V4L2_AUDCAP_STEREO;
1457 	return 0;
1458 }
1459 
1460 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1461 {
1462 	struct au0828_dev *dev = video_drvdata(file);
1463 
1464 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1465 		dev->std_set_in_tuner_core, dev->dev_state);
1466 
1467 	a->index = dev->ctrl_ainput;
1468 	if (a->index == 0)
1469 		strscpy(a->name, "Television", sizeof(a->name));
1470 	else
1471 		strscpy(a->name, "Line in", sizeof(a->name));
1472 
1473 	a->capability = V4L2_AUDCAP_STEREO;
1474 	return 0;
1475 }
1476 
1477 static int vidioc_s_audio(struct file *file, void *priv, const struct v4l2_audio *a)
1478 {
1479 	struct au0828_dev *dev = video_drvdata(file);
1480 
1481 	if (a->index != dev->ctrl_ainput)
1482 		return -EINVAL;
1483 
1484 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1485 		dev->std_set_in_tuner_core, dev->dev_state);
1486 	return 0;
1487 }
1488 
1489 static int vidioc_g_tuner(struct file *file, void *priv, struct v4l2_tuner *t)
1490 {
1491 	struct au0828_dev *dev = video_drvdata(file);
1492 	struct video_device *vfd = video_devdata(file);
1493 	int ret;
1494 
1495 	if (t->index != 0)
1496 		return -EINVAL;
1497 
1498 	ret = v4l_enable_media_source(vfd);
1499 	if (ret)
1500 		return ret;
1501 
1502 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1503 		dev->std_set_in_tuner_core, dev->dev_state);
1504 
1505 	strscpy(t->name, "Auvitek tuner", sizeof(t->name));
1506 
1507 	au0828_init_tuner(dev);
1508 	i2c_gate_ctrl(dev, 1);
1509 	v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t);
1510 	i2c_gate_ctrl(dev, 0);
1511 	return 0;
1512 }
1513 
1514 static int vidioc_s_tuner(struct file *file, void *priv,
1515 				const struct v4l2_tuner *t)
1516 {
1517 	struct au0828_dev *dev = video_drvdata(file);
1518 
1519 	if (t->index != 0)
1520 		return -EINVAL;
1521 
1522 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1523 		dev->std_set_in_tuner_core, dev->dev_state);
1524 
1525 	au0828_init_tuner(dev);
1526 	i2c_gate_ctrl(dev, 1);
1527 	v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t);
1528 	i2c_gate_ctrl(dev, 0);
1529 
1530 	dprintk(1, "VIDIOC_S_TUNER: signal = %x, afc = %x\n", t->signal,
1531 		t->afc);
1532 
1533 	return 0;
1534 
1535 }
1536 
1537 static int vidioc_g_frequency(struct file *file, void *priv,
1538 				struct v4l2_frequency *freq)
1539 {
1540 	struct au0828_dev *dev = video_drvdata(file);
1541 
1542 	if (freq->tuner != 0)
1543 		return -EINVAL;
1544 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1545 		dev->std_set_in_tuner_core, dev->dev_state);
1546 	freq->frequency = dev->ctrl_freq;
1547 	return 0;
1548 }
1549 
1550 static int vidioc_s_frequency(struct file *file, void *priv,
1551 				const struct v4l2_frequency *freq)
1552 {
1553 	struct au0828_dev *dev = video_drvdata(file);
1554 	struct v4l2_frequency new_freq = *freq;
1555 
1556 	if (freq->tuner != 0)
1557 		return -EINVAL;
1558 
1559 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1560 		dev->std_set_in_tuner_core, dev->dev_state);
1561 
1562 	au0828_init_tuner(dev);
1563 	i2c_gate_ctrl(dev, 1);
1564 
1565 	v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, freq);
1566 	/* Get the actual set (and possibly clamped) frequency */
1567 	v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_frequency, &new_freq);
1568 	dev->ctrl_freq = new_freq.frequency;
1569 
1570 	i2c_gate_ctrl(dev, 0);
1571 
1572 	au0828_analog_stream_reset(dev);
1573 
1574 	return 0;
1575 }
1576 
1577 
1578 /* RAW VBI ioctls */
1579 
1580 static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
1581 				struct v4l2_format *format)
1582 {
1583 	struct au0828_dev *dev = video_drvdata(file);
1584 
1585 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1586 		dev->std_set_in_tuner_core, dev->dev_state);
1587 
1588 	format->fmt.vbi.samples_per_line = dev->vbi_width;
1589 	format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
1590 	format->fmt.vbi.offset = 0;
1591 	format->fmt.vbi.flags = 0;
1592 	format->fmt.vbi.sampling_rate = 6750000 * 4 / 2;
1593 
1594 	format->fmt.vbi.count[0] = dev->vbi_height;
1595 	format->fmt.vbi.count[1] = dev->vbi_height;
1596 	format->fmt.vbi.start[0] = 21;
1597 	format->fmt.vbi.start[1] = 284;
1598 	memset(format->fmt.vbi.reserved, 0, sizeof(format->fmt.vbi.reserved));
1599 
1600 	return 0;
1601 }
1602 
1603 static int vidioc_g_pixelaspect(struct file *file, void *priv,
1604 				int type, struct v4l2_fract *f)
1605 {
1606 	struct au0828_dev *dev = video_drvdata(file);
1607 
1608 	if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1609 		return -EINVAL;
1610 
1611 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1612 		dev->std_set_in_tuner_core, dev->dev_state);
1613 
1614 	f->numerator = 54;
1615 	f->denominator = 59;
1616 
1617 	return 0;
1618 }
1619 
1620 static int vidioc_g_selection(struct file *file, void *priv,
1621 			      struct v4l2_selection *s)
1622 {
1623 	struct au0828_dev *dev = video_drvdata(file);
1624 
1625 	if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1626 		return -EINVAL;
1627 
1628 	switch (s->target) {
1629 	case V4L2_SEL_TGT_CROP_BOUNDS:
1630 	case V4L2_SEL_TGT_CROP_DEFAULT:
1631 		s->r.left = 0;
1632 		s->r.top = 0;
1633 		s->r.width = dev->width;
1634 		s->r.height = dev->height;
1635 		break;
1636 	default:
1637 		return -EINVAL;
1638 	}
1639 	return 0;
1640 }
1641 
1642 #ifdef CONFIG_VIDEO_ADV_DEBUG
1643 static int vidioc_g_register(struct file *file, void *priv,
1644 			     struct v4l2_dbg_register *reg)
1645 {
1646 	struct au0828_dev *dev = video_drvdata(file);
1647 
1648 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1649 		dev->std_set_in_tuner_core, dev->dev_state);
1650 
1651 	reg->val = au0828_read(dev, reg->reg);
1652 	reg->size = 1;
1653 	return 0;
1654 }
1655 
1656 static int vidioc_s_register(struct file *file, void *priv,
1657 			     const struct v4l2_dbg_register *reg)
1658 {
1659 	struct au0828_dev *dev = video_drvdata(file);
1660 
1661 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1662 		dev->std_set_in_tuner_core, dev->dev_state);
1663 
1664 	return au0828_writereg(dev, reg->reg, reg->val);
1665 }
1666 #endif
1667 
1668 static int vidioc_log_status(struct file *file, void *fh)
1669 {
1670 	struct video_device *vdev = video_devdata(file);
1671 
1672 	dprintk(1, "%s called\n", __func__);
1673 
1674 	v4l2_ctrl_log_status(file, fh);
1675 	v4l2_device_call_all(vdev->v4l2_dev, 0, core, log_status);
1676 	return 0;
1677 }
1678 
1679 void au0828_v4l2_suspend(struct au0828_dev *dev)
1680 {
1681 	struct urb *urb;
1682 	int i;
1683 
1684 	pr_info("stopping V4L2\n");
1685 
1686 	if (dev->stream_state == STREAM_ON) {
1687 		pr_info("stopping V4L2 active URBs\n");
1688 		au0828_analog_stream_disable(dev);
1689 		/* stop urbs */
1690 		for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
1691 			urb = dev->isoc_ctl.urb[i];
1692 			if (urb) {
1693 				if (!irqs_disabled())
1694 					usb_kill_urb(urb);
1695 				else
1696 					usb_unlink_urb(urb);
1697 			}
1698 		}
1699 	}
1700 
1701 	if (dev->vid_timeout_running)
1702 		del_timer_sync(&dev->vid_timeout);
1703 	if (dev->vbi_timeout_running)
1704 		del_timer_sync(&dev->vbi_timeout);
1705 }
1706 
1707 void au0828_v4l2_resume(struct au0828_dev *dev)
1708 {
1709 	int i, rc;
1710 
1711 	pr_info("restarting V4L2\n");
1712 
1713 	if (dev->stream_state == STREAM_ON) {
1714 		au0828_stream_interrupt(dev);
1715 		au0828_init_tuner(dev);
1716 	}
1717 
1718 	if (dev->vid_timeout_running)
1719 		mod_timer(&dev->vid_timeout, jiffies + (HZ / 10));
1720 	if (dev->vbi_timeout_running)
1721 		mod_timer(&dev->vbi_timeout, jiffies + (HZ / 10));
1722 
1723 	/* If we were doing ac97 instead of i2s, it would go here...*/
1724 	au0828_i2s_init(dev);
1725 
1726 	au0828_analog_stream_enable(dev);
1727 
1728 	if (!(dev->stream_state == STREAM_ON)) {
1729 		au0828_analog_stream_reset(dev);
1730 		/* submit urbs */
1731 		for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
1732 			rc = usb_submit_urb(dev->isoc_ctl.urb[i], GFP_ATOMIC);
1733 			if (rc) {
1734 				au0828_isocdbg("submit of urb %i failed (error=%i)\n",
1735 					       i, rc);
1736 				au0828_uninit_isoc(dev);
1737 			}
1738 		}
1739 	}
1740 }
1741 
1742 static const struct v4l2_file_operations au0828_v4l_fops = {
1743 	.owner      = THIS_MODULE,
1744 	.open       = au0828_v4l2_open,
1745 	.release    = au0828_v4l2_close,
1746 	.read       = vb2_fop_read,
1747 	.poll       = vb2_fop_poll,
1748 	.mmap       = vb2_fop_mmap,
1749 	.unlocked_ioctl = video_ioctl2,
1750 };
1751 
1752 static const struct v4l2_ioctl_ops video_ioctl_ops = {
1753 	.vidioc_querycap            = vidioc_querycap,
1754 	.vidioc_enum_fmt_vid_cap    = vidioc_enum_fmt_vid_cap,
1755 	.vidioc_g_fmt_vid_cap       = vidioc_g_fmt_vid_cap,
1756 	.vidioc_try_fmt_vid_cap     = vidioc_try_fmt_vid_cap,
1757 	.vidioc_s_fmt_vid_cap       = vidioc_s_fmt_vid_cap,
1758 	.vidioc_g_fmt_vbi_cap       = vidioc_g_fmt_vbi_cap,
1759 	.vidioc_try_fmt_vbi_cap     = vidioc_g_fmt_vbi_cap,
1760 	.vidioc_s_fmt_vbi_cap       = vidioc_g_fmt_vbi_cap,
1761 	.vidioc_enumaudio           = vidioc_enumaudio,
1762 	.vidioc_g_audio             = vidioc_g_audio,
1763 	.vidioc_s_audio             = vidioc_s_audio,
1764 	.vidioc_g_pixelaspect       = vidioc_g_pixelaspect,
1765 	.vidioc_g_selection         = vidioc_g_selection,
1766 
1767 	.vidioc_reqbufs             = vb2_ioctl_reqbufs,
1768 	.vidioc_create_bufs         = vb2_ioctl_create_bufs,
1769 	.vidioc_prepare_buf         = vb2_ioctl_prepare_buf,
1770 	.vidioc_querybuf            = vb2_ioctl_querybuf,
1771 	.vidioc_qbuf                = vb2_ioctl_qbuf,
1772 	.vidioc_dqbuf               = vb2_ioctl_dqbuf,
1773 	.vidioc_expbuf               = vb2_ioctl_expbuf,
1774 
1775 	.vidioc_s_std               = vidioc_s_std,
1776 	.vidioc_g_std               = vidioc_g_std,
1777 	.vidioc_enum_input          = vidioc_enum_input,
1778 	.vidioc_g_input             = vidioc_g_input,
1779 	.vidioc_s_input             = vidioc_s_input,
1780 
1781 	.vidioc_streamon            = vb2_ioctl_streamon,
1782 	.vidioc_streamoff           = vb2_ioctl_streamoff,
1783 
1784 	.vidioc_g_tuner             = vidioc_g_tuner,
1785 	.vidioc_s_tuner             = vidioc_s_tuner,
1786 	.vidioc_g_frequency         = vidioc_g_frequency,
1787 	.vidioc_s_frequency         = vidioc_s_frequency,
1788 #ifdef CONFIG_VIDEO_ADV_DEBUG
1789 	.vidioc_g_register          = vidioc_g_register,
1790 	.vidioc_s_register          = vidioc_s_register,
1791 #endif
1792 	.vidioc_log_status	    = vidioc_log_status,
1793 	.vidioc_subscribe_event     = v4l2_ctrl_subscribe_event,
1794 	.vidioc_unsubscribe_event   = v4l2_event_unsubscribe,
1795 };
1796 
1797 static const struct video_device au0828_video_template = {
1798 	.fops                       = &au0828_v4l_fops,
1799 	.release                    = video_device_release_empty,
1800 	.ioctl_ops		    = &video_ioctl_ops,
1801 	.tvnorms                    = V4L2_STD_NTSC_M | V4L2_STD_PAL_M,
1802 };
1803 
1804 static int au0828_vb2_setup(struct au0828_dev *dev)
1805 {
1806 	int rc;
1807 	struct vb2_queue *q;
1808 
1809 	/* Setup Videobuf2 for Video capture */
1810 	q = &dev->vb_vidq;
1811 	q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1812 	q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1813 	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1814 	q->drv_priv = dev;
1815 	q->buf_struct_size = sizeof(struct au0828_buffer);
1816 	q->ops = &au0828_video_qops;
1817 	q->mem_ops = &vb2_vmalloc_memops;
1818 
1819 	rc = vb2_queue_init(q);
1820 	if (rc < 0)
1821 		return rc;
1822 
1823 	/* Setup Videobuf2 for VBI capture */
1824 	q = &dev->vb_vbiq;
1825 	q->type = V4L2_BUF_TYPE_VBI_CAPTURE;
1826 	q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1827 	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1828 	q->drv_priv = dev;
1829 	q->buf_struct_size = sizeof(struct au0828_buffer);
1830 	q->ops = &au0828_vbi_qops;
1831 	q->mem_ops = &vb2_vmalloc_memops;
1832 
1833 	rc = vb2_queue_init(q);
1834 	if (rc < 0)
1835 		return rc;
1836 
1837 	return 0;
1838 }
1839 
1840 static void au0828_analog_create_entities(struct au0828_dev *dev)
1841 {
1842 #if defined(CONFIG_MEDIA_CONTROLLER)
1843 	static const char * const inames[] = {
1844 		[AU0828_VMUX_COMPOSITE] = "Composite",
1845 		[AU0828_VMUX_SVIDEO] = "S-Video",
1846 		[AU0828_VMUX_CABLE] = "Cable TV",
1847 		[AU0828_VMUX_TELEVISION] = "Television",
1848 		[AU0828_VMUX_DVB] = "DVB",
1849 	};
1850 	int ret, i;
1851 
1852 	/* Initialize Video and VBI pads */
1853 	dev->video_pad.flags = MEDIA_PAD_FL_SINK;
1854 	ret = media_entity_pads_init(&dev->vdev.entity, 1, &dev->video_pad);
1855 	if (ret < 0)
1856 		pr_err("failed to initialize video media entity!\n");
1857 
1858 	dev->vbi_pad.flags = MEDIA_PAD_FL_SINK;
1859 	ret = media_entity_pads_init(&dev->vbi_dev.entity, 1, &dev->vbi_pad);
1860 	if (ret < 0)
1861 		pr_err("failed to initialize vbi media entity!\n");
1862 
1863 	/* Create entities for each input connector */
1864 	for (i = 0; i < AU0828_MAX_INPUT; i++) {
1865 		struct media_entity *ent = &dev->input_ent[i];
1866 
1867 		if (AUVI_INPUT(i).type == AU0828_VMUX_UNDEFINED)
1868 			break;
1869 
1870 		ent->name = inames[AUVI_INPUT(i).type];
1871 		ent->flags = MEDIA_ENT_FL_CONNECTOR;
1872 		dev->input_pad[i].flags = MEDIA_PAD_FL_SOURCE;
1873 
1874 		switch (AUVI_INPUT(i).type) {
1875 		case AU0828_VMUX_COMPOSITE:
1876 			ent->function = MEDIA_ENT_F_CONN_COMPOSITE;
1877 			break;
1878 		case AU0828_VMUX_SVIDEO:
1879 			ent->function = MEDIA_ENT_F_CONN_SVIDEO;
1880 			break;
1881 		case AU0828_VMUX_CABLE:
1882 		case AU0828_VMUX_TELEVISION:
1883 		case AU0828_VMUX_DVB:
1884 		default: /* Just to shut up a warning */
1885 			ent->function = MEDIA_ENT_F_CONN_RF;
1886 			break;
1887 		}
1888 
1889 		ret = media_entity_pads_init(ent, 1, &dev->input_pad[i]);
1890 		if (ret < 0)
1891 			pr_err("failed to initialize input pad[%d]!\n", i);
1892 
1893 		ret = media_device_register_entity(dev->media_dev, ent);
1894 		if (ret < 0)
1895 			pr_err("failed to register input entity %d!\n", i);
1896 	}
1897 #endif
1898 }
1899 
1900 /**************************************************************************/
1901 
1902 int au0828_analog_register(struct au0828_dev *dev,
1903 			   struct usb_interface *interface)
1904 {
1905 	int retval = -ENOMEM;
1906 	struct usb_host_interface *iface_desc;
1907 	struct usb_endpoint_descriptor *endpoint;
1908 	int i, ret;
1909 
1910 	dprintk(1, "au0828_analog_register called for intf#%d!\n",
1911 		interface->cur_altsetting->desc.bInterfaceNumber);
1912 
1913 	/* No analog TV */
1914 	if (AUVI_INPUT(0).type == AU0828_VMUX_UNDEFINED)
1915 		return 0;
1916 
1917 	/* set au0828 usb interface0 to as5 */
1918 	retval = usb_set_interface(dev->usbdev,
1919 			interface->cur_altsetting->desc.bInterfaceNumber, 5);
1920 	if (retval != 0) {
1921 		pr_info("Failure setting usb interface0 to as5\n");
1922 		return retval;
1923 	}
1924 
1925 	/* Figure out which endpoint has the isoc interface */
1926 	iface_desc = interface->cur_altsetting;
1927 	for (i = 0; i < iface_desc->desc.bNumEndpoints; i++) {
1928 		endpoint = &iface_desc->endpoint[i].desc;
1929 		if (((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
1930 		     == USB_DIR_IN) &&
1931 		    ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
1932 		     == USB_ENDPOINT_XFER_ISOC)) {
1933 
1934 			/* we find our isoc in endpoint */
1935 			u16 tmp = le16_to_cpu(endpoint->wMaxPacketSize);
1936 			dev->max_pkt_size = (tmp & 0x07ff) *
1937 				(((tmp & 0x1800) >> 11) + 1);
1938 			dev->isoc_in_endpointaddr = endpoint->bEndpointAddress;
1939 			dprintk(1,
1940 				"Found isoc endpoint 0x%02x, max size = %d\n",
1941 				dev->isoc_in_endpointaddr, dev->max_pkt_size);
1942 		}
1943 	}
1944 	if (!(dev->isoc_in_endpointaddr)) {
1945 		pr_info("Could not locate isoc endpoint\n");
1946 		return -ENODEV;
1947 	}
1948 
1949 	init_waitqueue_head(&dev->open);
1950 	spin_lock_init(&dev->slock);
1951 
1952 	/* init video dma queues */
1953 	INIT_LIST_HEAD(&dev->vidq.active);
1954 	INIT_LIST_HEAD(&dev->vbiq.active);
1955 
1956 	timer_setup(&dev->vid_timeout, au0828_vid_buffer_timeout, 0);
1957 	timer_setup(&dev->vbi_timeout, au0828_vbi_buffer_timeout, 0);
1958 
1959 	dev->width = NTSC_STD_W;
1960 	dev->height = NTSC_STD_H;
1961 	dev->field_size = dev->width * dev->height;
1962 	dev->frame_size = dev->field_size << 1;
1963 	dev->bytesperline = dev->width << 1;
1964 	dev->vbi_width = 720;
1965 	dev->vbi_height = 1;
1966 	dev->ctrl_ainput = 0;
1967 	dev->ctrl_freq = 960;
1968 	dev->std = V4L2_STD_NTSC_M;
1969 	/* Default input is TV Tuner */
1970 	au0828_s_input(dev, 0);
1971 
1972 	mutex_init(&dev->vb_queue_lock);
1973 	mutex_init(&dev->vb_vbi_queue_lock);
1974 
1975 	/* Fill the video capture device struct */
1976 	dev->vdev = au0828_video_template;
1977 	dev->vdev.v4l2_dev = &dev->v4l2_dev;
1978 	dev->vdev.lock = &dev->lock;
1979 	dev->vdev.queue = &dev->vb_vidq;
1980 	dev->vdev.queue->lock = &dev->vb_queue_lock;
1981 	dev->vdev.device_caps =
1982 		V4L2_CAP_AUDIO | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING |
1983 		V4L2_CAP_TUNER | V4L2_CAP_VIDEO_CAPTURE;
1984 	strscpy(dev->vdev.name, "au0828a video", sizeof(dev->vdev.name));
1985 
1986 	/* Setup the VBI device */
1987 	dev->vbi_dev = au0828_video_template;
1988 	dev->vbi_dev.v4l2_dev = &dev->v4l2_dev;
1989 	dev->vbi_dev.lock = &dev->lock;
1990 	dev->vbi_dev.queue = &dev->vb_vbiq;
1991 	dev->vbi_dev.queue->lock = &dev->vb_vbi_queue_lock;
1992 	dev->vbi_dev.device_caps =
1993 		V4L2_CAP_AUDIO | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING |
1994 		V4L2_CAP_TUNER | V4L2_CAP_VBI_CAPTURE;
1995 	strscpy(dev->vbi_dev.name, "au0828a vbi", sizeof(dev->vbi_dev.name));
1996 
1997 	/* Init entities at the Media Controller */
1998 	au0828_analog_create_entities(dev);
1999 
2000 	/* initialize videobuf2 stuff */
2001 	retval = au0828_vb2_setup(dev);
2002 	if (retval != 0) {
2003 		dprintk(1, "unable to setup videobuf2 queues (error = %d).\n",
2004 			retval);
2005 		return -ENODEV;
2006 	}
2007 
2008 	/* Register the v4l2 device */
2009 	video_set_drvdata(&dev->vdev, dev);
2010 	retval = video_register_device(&dev->vdev, VFL_TYPE_VIDEO, -1);
2011 	if (retval != 0) {
2012 		dprintk(1, "unable to register video device (error = %d).\n",
2013 			retval);
2014 		return -ENODEV;
2015 	}
2016 
2017 	/* Register the vbi device */
2018 	video_set_drvdata(&dev->vbi_dev, dev);
2019 	retval = video_register_device(&dev->vbi_dev, VFL_TYPE_VBI, -1);
2020 	if (retval != 0) {
2021 		dprintk(1, "unable to register vbi device (error = %d).\n",
2022 			retval);
2023 		ret = -ENODEV;
2024 		goto err_reg_vbi_dev;
2025 	}
2026 
2027 #ifdef CONFIG_MEDIA_CONTROLLER
2028 	retval = v4l2_mc_create_media_graph(dev->media_dev);
2029 	if (retval) {
2030 		pr_err("%s() au0282_dev_register failed to create graph\n",
2031 			__func__);
2032 		ret = -ENODEV;
2033 		goto err_reg_vbi_dev;
2034 	}
2035 #endif
2036 
2037 	dprintk(1, "%s completed!\n", __func__);
2038 
2039 	return 0;
2040 
2041 err_reg_vbi_dev:
2042 	vb2_video_unregister_device(&dev->vdev);
2043 	return ret;
2044 }
2045 
2046