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_isocdbg("cannot allocate URB\n");
235 			au0828_uninit_isoc(dev);
236 			return -ENOMEM;
237 		}
238 		dev->isoc_ctl.urb[i] = urb;
239 
240 		dev->isoc_ctl.transfer_buffer[i] = usb_alloc_coherent(dev->usbdev,
241 			sb_size, GFP_KERNEL, &urb->transfer_dma);
242 		if (!dev->isoc_ctl.transfer_buffer[i]) {
243 			au0828_isocdbg("cannot allocate transfer buffer\n");
244 			au0828_uninit_isoc(dev);
245 			return -ENOMEM;
246 		}
247 		memset(dev->isoc_ctl.transfer_buffer[i], 0, sb_size);
248 
249 		pipe = usb_rcvisocpipe(dev->usbdev,
250 				       dev->isoc_in_endpointaddr);
251 
252 		usb_fill_int_urb(urb, dev->usbdev, pipe,
253 				 dev->isoc_ctl.transfer_buffer[i], sb_size,
254 				 au0828_irq_callback, dma_q, 1);
255 
256 		urb->number_of_packets = max_packets;
257 		urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
258 
259 		k = 0;
260 		for (j = 0; j < max_packets; j++) {
261 			urb->iso_frame_desc[j].offset = k;
262 			urb->iso_frame_desc[j].length =
263 						dev->isoc_ctl.max_pkt_size;
264 			k += dev->isoc_ctl.max_pkt_size;
265 		}
266 	}
267 
268 	/* submit urbs and enables IRQ */
269 	for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
270 		rc = usb_submit_urb(dev->isoc_ctl.urb[i], GFP_ATOMIC);
271 		if (rc) {
272 			au0828_isocdbg("submit of urb %i failed (error=%i)\n",
273 				       i, rc);
274 			au0828_uninit_isoc(dev);
275 			return rc;
276 		}
277 	}
278 
279 	return 0;
280 }
281 
282 /*
283  * Announces that a buffer were filled and request the next
284  */
285 static inline void buffer_filled(struct au0828_dev *dev,
286 				 struct au0828_dmaqueue *dma_q,
287 				 struct au0828_buffer *buf)
288 {
289 	struct vb2_v4l2_buffer *vb = &buf->vb;
290 	struct vb2_queue *q = vb->vb2_buf.vb2_queue;
291 
292 	/* Advice that buffer was filled */
293 	au0828_isocdbg("[%p/%d] wakeup\n", buf, buf->top_field);
294 
295 	if (q->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
296 		vb->sequence = dev->frame_count++;
297 	else
298 		vb->sequence = dev->vbi_frame_count++;
299 
300 	vb->field = V4L2_FIELD_INTERLACED;
301 	vb->vb2_buf.timestamp = ktime_get_ns();
302 	vb2_buffer_done(&vb->vb2_buf, VB2_BUF_STATE_DONE);
303 }
304 
305 /*
306  * Identify the buffer header type and properly handles
307  */
308 static void au0828_copy_video(struct au0828_dev *dev,
309 			      struct au0828_dmaqueue  *dma_q,
310 			      struct au0828_buffer *buf,
311 			      unsigned char *p,
312 			      unsigned char *outp, unsigned long len)
313 {
314 	void *fieldstart, *startwrite, *startread;
315 	int  linesdone, currlinedone, offset, lencopy, remain;
316 	int bytesperline = dev->width << 1; /* Assumes 16-bit depth @@@@ */
317 
318 	if (len == 0)
319 		return;
320 
321 	if (dma_q->pos + len > buf->length)
322 		len = buf->length - dma_q->pos;
323 
324 	startread = p;
325 	remain = len;
326 
327 	/* Interlaces frame */
328 	if (buf->top_field)
329 		fieldstart = outp;
330 	else
331 		fieldstart = outp + bytesperline;
332 
333 	linesdone = dma_q->pos / bytesperline;
334 	currlinedone = dma_q->pos % bytesperline;
335 	offset = linesdone * bytesperline * 2 + currlinedone;
336 	startwrite = fieldstart + offset;
337 	lencopy = bytesperline - currlinedone;
338 	lencopy = lencopy > remain ? remain : lencopy;
339 
340 	if ((char *)startwrite + lencopy > (char *)outp + buf->length) {
341 		au0828_isocdbg("Overflow of %zi bytes past buffer end (1)\n",
342 			       ((char *)startwrite + lencopy) -
343 			       ((char *)outp + buf->length));
344 		remain = (char *)outp + buf->length - (char *)startwrite;
345 		lencopy = remain;
346 	}
347 	if (lencopy <= 0)
348 		return;
349 	memcpy(startwrite, startread, lencopy);
350 
351 	remain -= lencopy;
352 
353 	while (remain > 0) {
354 		startwrite += lencopy + bytesperline;
355 		startread += lencopy;
356 		if (bytesperline > remain)
357 			lencopy = remain;
358 		else
359 			lencopy = bytesperline;
360 
361 		if ((char *)startwrite + lencopy > (char *)outp +
362 		    buf->length) {
363 			au0828_isocdbg("Overflow %zi bytes past buf end (2)\n",
364 				       ((char *)startwrite + lencopy) -
365 				       ((char *)outp + buf->length));
366 			lencopy = remain = (char *)outp + buf->length -
367 					   (char *)startwrite;
368 		}
369 		if (lencopy <= 0)
370 			break;
371 
372 		memcpy(startwrite, startread, lencopy);
373 
374 		remain -= lencopy;
375 	}
376 
377 	if (offset > 1440) {
378 		/* We have enough data to check for greenscreen */
379 		if (outp[0] < 0x60 && outp[1440] < 0x60)
380 			dev->greenscreen_detected = 1;
381 	}
382 
383 	dma_q->pos += len;
384 }
385 
386 /*
387  * generic routine to get the next available buffer
388  */
389 static inline void get_next_buf(struct au0828_dmaqueue *dma_q,
390 				struct au0828_buffer **buf)
391 {
392 	struct au0828_dev *dev = container_of(dma_q, struct au0828_dev, vidq);
393 
394 	if (list_empty(&dma_q->active)) {
395 		au0828_isocdbg("No active queue to serve\n");
396 		dev->isoc_ctl.buf = NULL;
397 		*buf = NULL;
398 		return;
399 	}
400 
401 	/* Get the next buffer */
402 	*buf = list_entry(dma_q->active.next, struct au0828_buffer, list);
403 	/* Cleans up buffer - Useful for testing for frame/URB loss */
404 	list_del(&(*buf)->list);
405 	dma_q->pos = 0;
406 	(*buf)->vb_buf = (*buf)->mem;
407 	dev->isoc_ctl.buf = *buf;
408 
409 	return;
410 }
411 
412 static void au0828_copy_vbi(struct au0828_dev *dev,
413 			      struct au0828_dmaqueue  *dma_q,
414 			      struct au0828_buffer *buf,
415 			      unsigned char *p,
416 			      unsigned char *outp, unsigned long len)
417 {
418 	unsigned char *startwrite, *startread;
419 	int bytesperline;
420 	int i, j = 0;
421 
422 	if (dev == NULL) {
423 		au0828_isocdbg("dev is null\n");
424 		return;
425 	}
426 
427 	if (dma_q == NULL) {
428 		au0828_isocdbg("dma_q is null\n");
429 		return;
430 	}
431 	if (buf == NULL)
432 		return;
433 	if (p == NULL) {
434 		au0828_isocdbg("p is null\n");
435 		return;
436 	}
437 	if (outp == NULL) {
438 		au0828_isocdbg("outp is null\n");
439 		return;
440 	}
441 
442 	bytesperline = dev->vbi_width;
443 
444 	if (dma_q->pos + len > buf->length)
445 		len = buf->length - dma_q->pos;
446 
447 	startread = p;
448 	startwrite = outp + (dma_q->pos / 2);
449 
450 	/* Make sure the bottom field populates the second half of the frame */
451 	if (buf->top_field == 0)
452 		startwrite += bytesperline * dev->vbi_height;
453 
454 	for (i = 0; i < len; i += 2)
455 		startwrite[j++] = startread[i+1];
456 
457 	dma_q->pos += len;
458 }
459 
460 
461 /*
462  * generic routine to get the next available VBI buffer
463  */
464 static inline void vbi_get_next_buf(struct au0828_dmaqueue *dma_q,
465 				    struct au0828_buffer **buf)
466 {
467 	struct au0828_dev *dev = container_of(dma_q, struct au0828_dev, vbiq);
468 
469 	if (list_empty(&dma_q->active)) {
470 		au0828_isocdbg("No active queue to serve\n");
471 		dev->isoc_ctl.vbi_buf = NULL;
472 		*buf = NULL;
473 		return;
474 	}
475 
476 	/* Get the next buffer */
477 	*buf = list_entry(dma_q->active.next, struct au0828_buffer, list);
478 	/* Cleans up buffer - Useful for testing for frame/URB loss */
479 	list_del(&(*buf)->list);
480 	dma_q->pos = 0;
481 	(*buf)->vb_buf = (*buf)->mem;
482 	dev->isoc_ctl.vbi_buf = *buf;
483 	return;
484 }
485 
486 /*
487  * Controls the isoc copy of each urb packet
488  */
489 static inline int au0828_isoc_copy(struct au0828_dev *dev, struct urb *urb)
490 {
491 	struct au0828_buffer    *buf;
492 	struct au0828_buffer    *vbi_buf;
493 	struct au0828_dmaqueue  *dma_q = urb->context;
494 	struct au0828_dmaqueue  *vbi_dma_q = &dev->vbiq;
495 	unsigned char *outp = NULL;
496 	unsigned char *vbioutp = NULL;
497 	int i, len = 0, rc = 1;
498 	unsigned char *p;
499 	unsigned char fbyte;
500 	unsigned int vbi_field_size;
501 	unsigned int remain, lencopy;
502 
503 	if (!dev)
504 		return 0;
505 
506 	if (test_bit(DEV_DISCONNECTED, &dev->dev_state) ||
507 	    test_bit(DEV_MISCONFIGURED, &dev->dev_state))
508 		return 0;
509 
510 	if (urb->status < 0) {
511 		print_err_status(dev, -1, urb->status);
512 		if (urb->status == -ENOENT)
513 			return 0;
514 	}
515 
516 	buf = dev->isoc_ctl.buf;
517 	if (buf != NULL)
518 		outp = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
519 
520 	vbi_buf = dev->isoc_ctl.vbi_buf;
521 	if (vbi_buf != NULL)
522 		vbioutp = vb2_plane_vaddr(&vbi_buf->vb.vb2_buf, 0);
523 
524 	for (i = 0; i < urb->number_of_packets; i++) {
525 		int status = urb->iso_frame_desc[i].status;
526 
527 		if (status < 0) {
528 			print_err_status(dev, i, status);
529 			if (urb->iso_frame_desc[i].status != -EPROTO)
530 				continue;
531 		}
532 
533 		if (urb->iso_frame_desc[i].actual_length <= 0)
534 			continue;
535 
536 		if (urb->iso_frame_desc[i].actual_length >
537 						dev->max_pkt_size) {
538 			au0828_isocdbg("packet bigger than packet size");
539 			continue;
540 		}
541 
542 		p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
543 		fbyte = p[0];
544 		len = urb->iso_frame_desc[i].actual_length - 4;
545 		p += 4;
546 
547 		if (fbyte & 0x80) {
548 			len -= 4;
549 			p += 4;
550 			au0828_isocdbg("Video frame %s\n",
551 				       (fbyte & 0x40) ? "odd" : "even");
552 			if (fbyte & 0x40) {
553 				/* VBI */
554 				if (vbi_buf != NULL)
555 					buffer_filled(dev, vbi_dma_q, vbi_buf);
556 				vbi_get_next_buf(vbi_dma_q, &vbi_buf);
557 				if (vbi_buf == NULL)
558 					vbioutp = NULL;
559 				else
560 					vbioutp = vb2_plane_vaddr(
561 						&vbi_buf->vb.vb2_buf, 0);
562 
563 				/* Video */
564 				if (buf != NULL)
565 					buffer_filled(dev, dma_q, buf);
566 				get_next_buf(dma_q, &buf);
567 				if (buf == NULL)
568 					outp = NULL;
569 				else
570 					outp = vb2_plane_vaddr(
571 						&buf->vb.vb2_buf, 0);
572 
573 				/* As long as isoc traffic is arriving, keep
574 				   resetting the timer */
575 				if (dev->vid_timeout_running)
576 					mod_timer(&dev->vid_timeout,
577 						  jiffies + (HZ / 10));
578 				if (dev->vbi_timeout_running)
579 					mod_timer(&dev->vbi_timeout,
580 						  jiffies + (HZ / 10));
581 			}
582 
583 			if (buf != NULL) {
584 				if (fbyte & 0x40)
585 					buf->top_field = 1;
586 				else
587 					buf->top_field = 0;
588 			}
589 
590 			if (vbi_buf != NULL) {
591 				if (fbyte & 0x40)
592 					vbi_buf->top_field = 1;
593 				else
594 					vbi_buf->top_field = 0;
595 			}
596 
597 			dev->vbi_read = 0;
598 			vbi_dma_q->pos = 0;
599 			dma_q->pos = 0;
600 		}
601 
602 		vbi_field_size = dev->vbi_width * dev->vbi_height * 2;
603 		if (dev->vbi_read < vbi_field_size) {
604 			remain  = vbi_field_size - dev->vbi_read;
605 			if (len < remain)
606 				lencopy = len;
607 			else
608 				lencopy = remain;
609 
610 			if (vbi_buf != NULL)
611 				au0828_copy_vbi(dev, vbi_dma_q, vbi_buf, p,
612 						vbioutp, len);
613 
614 			len -= lencopy;
615 			p += lencopy;
616 			dev->vbi_read += lencopy;
617 		}
618 
619 		if (dev->vbi_read >= vbi_field_size && buf != NULL)
620 			au0828_copy_video(dev, dma_q, buf, p, outp, len);
621 	}
622 	return rc;
623 }
624 
625 void au0828_usb_v4l2_media_release(struct au0828_dev *dev)
626 {
627 #ifdef CONFIG_MEDIA_CONTROLLER
628 	int i;
629 
630 	for (i = 0; i < AU0828_MAX_INPUT; i++) {
631 		if (AUVI_INPUT(i).type == AU0828_VMUX_UNDEFINED)
632 			return;
633 		media_device_unregister_entity(&dev->input_ent[i]);
634 	}
635 #endif
636 }
637 
638 static void au0828_usb_v4l2_release(struct v4l2_device *v4l2_dev)
639 {
640 	struct au0828_dev *dev =
641 		container_of(v4l2_dev, struct au0828_dev, v4l2_dev);
642 
643 	v4l2_ctrl_handler_free(&dev->v4l2_ctrl_hdl);
644 	v4l2_device_unregister(&dev->v4l2_dev);
645 	au0828_usb_v4l2_media_release(dev);
646 	au0828_usb_release(dev);
647 }
648 
649 int au0828_v4l2_device_register(struct usb_interface *interface,
650 				struct au0828_dev *dev)
651 {
652 	int retval;
653 
654 	if (AUVI_INPUT(0).type == AU0828_VMUX_UNDEFINED)
655 		return 0;
656 
657 	/* Create the v4l2_device */
658 #ifdef CONFIG_MEDIA_CONTROLLER
659 	dev->v4l2_dev.mdev = dev->media_dev;
660 #endif
661 	retval = v4l2_device_register(&interface->dev, &dev->v4l2_dev);
662 	if (retval) {
663 		pr_err("%s() v4l2_device_register failed\n",
664 		       __func__);
665 		return retval;
666 	}
667 
668 	dev->v4l2_dev.release = au0828_usb_v4l2_release;
669 
670 	/* This control handler will inherit the controls from au8522 */
671 	retval = v4l2_ctrl_handler_init(&dev->v4l2_ctrl_hdl, 4);
672 	if (retval) {
673 		pr_err("%s() v4l2_ctrl_handler_init failed\n",
674 		       __func__);
675 		return retval;
676 	}
677 	dev->v4l2_dev.ctrl_handler = &dev->v4l2_ctrl_hdl;
678 
679 	return 0;
680 }
681 
682 static int queue_setup(struct vb2_queue *vq,
683 		       unsigned int *nbuffers, unsigned int *nplanes,
684 		       unsigned int sizes[], struct device *alloc_devs[])
685 {
686 	struct au0828_dev *dev = vb2_get_drv_priv(vq);
687 	unsigned long size = dev->height * dev->bytesperline;
688 
689 	if (*nplanes)
690 		return sizes[0] < size ? -EINVAL : 0;
691 	*nplanes = 1;
692 	sizes[0] = size;
693 	return 0;
694 }
695 
696 static int
697 buffer_prepare(struct vb2_buffer *vb)
698 {
699 	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
700 	struct au0828_buffer *buf = container_of(vbuf,
701 				struct au0828_buffer, vb);
702 	struct au0828_dev    *dev = vb2_get_drv_priv(vb->vb2_queue);
703 
704 	buf->length = dev->height * dev->bytesperline;
705 
706 	if (vb2_plane_size(vb, 0) < buf->length) {
707 		pr_err("%s data will not fit into plane (%lu < %lu)\n",
708 			__func__, vb2_plane_size(vb, 0), buf->length);
709 		return -EINVAL;
710 	}
711 	vb2_set_plane_payload(&buf->vb.vb2_buf, 0, buf->length);
712 	return 0;
713 }
714 
715 static void
716 buffer_queue(struct vb2_buffer *vb)
717 {
718 	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
719 	struct au0828_buffer    *buf     = container_of(vbuf,
720 							struct au0828_buffer,
721 							vb);
722 	struct au0828_dev       *dev     = vb2_get_drv_priv(vb->vb2_queue);
723 	struct au0828_dmaqueue  *vidq    = &dev->vidq;
724 	unsigned long flags = 0;
725 
726 	buf->mem = vb2_plane_vaddr(vb, 0);
727 	buf->length = vb2_plane_size(vb, 0);
728 
729 	spin_lock_irqsave(&dev->slock, flags);
730 	list_add_tail(&buf->list, &vidq->active);
731 	spin_unlock_irqrestore(&dev->slock, flags);
732 }
733 
734 static int au0828_i2s_init(struct au0828_dev *dev)
735 {
736 	/* Enable i2s mode */
737 	au0828_writereg(dev, AU0828_AUDIOCTRL_50C, 0x01);
738 	return 0;
739 }
740 
741 /*
742  * Auvitek au0828 analog stream enable
743  */
744 static int au0828_analog_stream_enable(struct au0828_dev *d)
745 {
746 	struct usb_interface *iface;
747 	int ret, h, w;
748 
749 	dprintk(1, "au0828_analog_stream_enable called\n");
750 
751 	if (test_bit(DEV_DISCONNECTED, &d->dev_state))
752 		return -ENODEV;
753 
754 	iface = usb_ifnum_to_if(d->usbdev, 0);
755 	if (iface && iface->cur_altsetting->desc.bAlternateSetting != 5) {
756 		dprintk(1, "Changing intf#0 to alt 5\n");
757 		/* set au0828 interface0 to AS5 here again */
758 		ret = usb_set_interface(d->usbdev, 0, 5);
759 		if (ret < 0) {
760 			pr_info("Au0828 can't set alt setting to 5!\n");
761 			return -EBUSY;
762 		}
763 	}
764 
765 	h = d->height / 2 + 2;
766 	w = d->width * 2;
767 
768 	au0828_writereg(d, AU0828_SENSORCTRL_VBI_103, 0x00);
769 	au0828_writereg(d, 0x106, 0x00);
770 	/* set x position */
771 	au0828_writereg(d, 0x110, 0x00);
772 	au0828_writereg(d, 0x111, 0x00);
773 	au0828_writereg(d, 0x114, w & 0xff);
774 	au0828_writereg(d, 0x115, w >> 8);
775 	/* set y position */
776 	au0828_writereg(d, 0x112, 0x00);
777 	au0828_writereg(d, 0x113, 0x00);
778 	au0828_writereg(d, 0x116, h & 0xff);
779 	au0828_writereg(d, 0x117, h >> 8);
780 	au0828_writereg(d, AU0828_SENSORCTRL_100, 0xb3);
781 
782 	return 0;
783 }
784 
785 static int au0828_analog_stream_disable(struct au0828_dev *d)
786 {
787 	dprintk(1, "au0828_analog_stream_disable called\n");
788 	au0828_writereg(d, AU0828_SENSORCTRL_100, 0x0);
789 	return 0;
790 }
791 
792 static void au0828_analog_stream_reset(struct au0828_dev *dev)
793 {
794 	dprintk(1, "au0828_analog_stream_reset called\n");
795 	au0828_writereg(dev, AU0828_SENSORCTRL_100, 0x0);
796 	mdelay(30);
797 	au0828_writereg(dev, AU0828_SENSORCTRL_100, 0xb3);
798 }
799 
800 /*
801  * Some operations needs to stop current streaming
802  */
803 static int au0828_stream_interrupt(struct au0828_dev *dev)
804 {
805 	dev->stream_state = STREAM_INTERRUPT;
806 	if (test_bit(DEV_DISCONNECTED, &dev->dev_state))
807 		return -ENODEV;
808 	return 0;
809 }
810 
811 int au0828_start_analog_streaming(struct vb2_queue *vq, unsigned int count)
812 {
813 	struct au0828_dev *dev = vb2_get_drv_priv(vq);
814 	int rc = 0;
815 
816 	dprintk(1, "au0828_start_analog_streaming called %d\n",
817 		dev->streaming_users);
818 
819 	if (vq->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
820 		dev->frame_count = 0;
821 	else
822 		dev->vbi_frame_count = 0;
823 
824 	if (dev->streaming_users == 0) {
825 		/* If we were doing ac97 instead of i2s, it would go here...*/
826 		au0828_i2s_init(dev);
827 		rc = au0828_init_isoc(dev, AU0828_ISO_PACKETS_PER_URB,
828 				   AU0828_MAX_ISO_BUFS, dev->max_pkt_size,
829 				   au0828_isoc_copy);
830 		if (rc < 0) {
831 			pr_info("au0828_init_isoc failed\n");
832 			return rc;
833 		}
834 
835 		v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 1);
836 
837 		if (vq->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
838 			dev->vid_timeout_running = 1;
839 			mod_timer(&dev->vid_timeout, jiffies + (HZ / 10));
840 		} else if (vq->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
841 			dev->vbi_timeout_running = 1;
842 			mod_timer(&dev->vbi_timeout, jiffies + (HZ / 10));
843 		}
844 	}
845 	dev->streaming_users++;
846 	return rc;
847 }
848 
849 static void au0828_stop_streaming(struct vb2_queue *vq)
850 {
851 	struct au0828_dev *dev = vb2_get_drv_priv(vq);
852 	struct au0828_dmaqueue *vidq = &dev->vidq;
853 	unsigned long flags = 0;
854 
855 	dprintk(1, "au0828_stop_streaming called %d\n", dev->streaming_users);
856 
857 	if (dev->streaming_users-- == 1) {
858 		au0828_uninit_isoc(dev);
859 		v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 0);
860 	}
861 
862 	dev->vid_timeout_running = 0;
863 	del_timer_sync(&dev->vid_timeout);
864 
865 	spin_lock_irqsave(&dev->slock, flags);
866 	if (dev->isoc_ctl.buf != NULL) {
867 		vb2_buffer_done(&dev->isoc_ctl.buf->vb.vb2_buf,
868 				VB2_BUF_STATE_ERROR);
869 		dev->isoc_ctl.buf = NULL;
870 	}
871 	while (!list_empty(&vidq->active)) {
872 		struct au0828_buffer *buf;
873 
874 		buf = list_entry(vidq->active.next, struct au0828_buffer, list);
875 		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
876 		list_del(&buf->list);
877 	}
878 	spin_unlock_irqrestore(&dev->slock, flags);
879 }
880 
881 void au0828_stop_vbi_streaming(struct vb2_queue *vq)
882 {
883 	struct au0828_dev *dev = vb2_get_drv_priv(vq);
884 	struct au0828_dmaqueue *vbiq = &dev->vbiq;
885 	unsigned long flags = 0;
886 
887 	dprintk(1, "au0828_stop_vbi_streaming called %d\n",
888 		dev->streaming_users);
889 
890 	if (dev->streaming_users-- == 1) {
891 		au0828_uninit_isoc(dev);
892 		v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 0);
893 	}
894 
895 	spin_lock_irqsave(&dev->slock, flags);
896 	if (dev->isoc_ctl.vbi_buf != NULL) {
897 		vb2_buffer_done(&dev->isoc_ctl.vbi_buf->vb.vb2_buf,
898 				VB2_BUF_STATE_ERROR);
899 		dev->isoc_ctl.vbi_buf = NULL;
900 	}
901 	while (!list_empty(&vbiq->active)) {
902 		struct au0828_buffer *buf;
903 
904 		buf = list_entry(vbiq->active.next, struct au0828_buffer, list);
905 		list_del(&buf->list);
906 		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
907 	}
908 	spin_unlock_irqrestore(&dev->slock, flags);
909 
910 	dev->vbi_timeout_running = 0;
911 	del_timer_sync(&dev->vbi_timeout);
912 }
913 
914 static const struct vb2_ops au0828_video_qops = {
915 	.queue_setup     = queue_setup,
916 	.buf_prepare     = buffer_prepare,
917 	.buf_queue       = buffer_queue,
918 	.start_streaming = au0828_start_analog_streaming,
919 	.stop_streaming  = au0828_stop_streaming,
920 	.wait_prepare    = vb2_ops_wait_prepare,
921 	.wait_finish     = vb2_ops_wait_finish,
922 };
923 
924 /* ------------------------------------------------------------------
925    V4L2 interface
926    ------------------------------------------------------------------*/
927 /*
928  * au0828_analog_unregister
929  * unregister v4l2 devices
930  */
931 int au0828_analog_unregister(struct au0828_dev *dev)
932 {
933 	dprintk(1, "au0828_analog_unregister called\n");
934 
935 	/* No analog TV */
936 	if (AUVI_INPUT(0).type == AU0828_VMUX_UNDEFINED)
937 		return 0;
938 
939 	mutex_lock(&au0828_sysfs_lock);
940 	vb2_video_unregister_device(&dev->vdev);
941 	vb2_video_unregister_device(&dev->vbi_dev);
942 	mutex_unlock(&au0828_sysfs_lock);
943 
944 	v4l2_device_disconnect(&dev->v4l2_dev);
945 	v4l2_device_put(&dev->v4l2_dev);
946 
947 	return 1;
948 }
949 
950 /* This function ensures that video frames continue to be delivered even if
951    the ITU-656 input isn't receiving any data (thereby preventing applications
952    such as tvtime from hanging) */
953 static void au0828_vid_buffer_timeout(struct timer_list *t)
954 {
955 	struct au0828_dev *dev = from_timer(dev, t, vid_timeout);
956 	struct au0828_dmaqueue *dma_q = &dev->vidq;
957 	struct au0828_buffer *buf;
958 	unsigned char *vid_data;
959 	unsigned long flags = 0;
960 
961 	spin_lock_irqsave(&dev->slock, flags);
962 
963 	buf = dev->isoc_ctl.buf;
964 	if (buf != NULL) {
965 		vid_data = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
966 		memset(vid_data, 0x00, buf->length); /* Blank green frame */
967 		buffer_filled(dev, dma_q, buf);
968 	}
969 	get_next_buf(dma_q, &buf);
970 
971 	if (dev->vid_timeout_running == 1)
972 		mod_timer(&dev->vid_timeout, jiffies + (HZ / 10));
973 
974 	spin_unlock_irqrestore(&dev->slock, flags);
975 }
976 
977 static void au0828_vbi_buffer_timeout(struct timer_list *t)
978 {
979 	struct au0828_dev *dev = from_timer(dev, t, vbi_timeout);
980 	struct au0828_dmaqueue *dma_q = &dev->vbiq;
981 	struct au0828_buffer *buf;
982 	unsigned char *vbi_data;
983 	unsigned long flags = 0;
984 
985 	spin_lock_irqsave(&dev->slock, flags);
986 
987 	buf = dev->isoc_ctl.vbi_buf;
988 	if (buf != NULL) {
989 		vbi_data = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
990 		memset(vbi_data, 0x00, buf->length);
991 		buffer_filled(dev, dma_q, buf);
992 	}
993 	vbi_get_next_buf(dma_q, &buf);
994 
995 	if (dev->vbi_timeout_running == 1)
996 		mod_timer(&dev->vbi_timeout, jiffies + (HZ / 10));
997 	spin_unlock_irqrestore(&dev->slock, flags);
998 }
999 
1000 static int au0828_v4l2_open(struct file *filp)
1001 {
1002 	struct au0828_dev *dev = video_drvdata(filp);
1003 	int ret;
1004 
1005 	dprintk(1,
1006 		"%s called std_set %d dev_state %ld stream users %d users %d\n",
1007 		__func__, dev->std_set_in_tuner_core, dev->dev_state,
1008 		dev->streaming_users, dev->users);
1009 
1010 	if (mutex_lock_interruptible(&dev->lock))
1011 		return -ERESTARTSYS;
1012 
1013 	ret = v4l2_fh_open(filp);
1014 	if (ret) {
1015 		au0828_isocdbg("%s: v4l2_fh_open() returned error %d\n",
1016 				__func__, ret);
1017 		mutex_unlock(&dev->lock);
1018 		return ret;
1019 	}
1020 
1021 	if (dev->users == 0) {
1022 		au0828_analog_stream_enable(dev);
1023 		au0828_analog_stream_reset(dev);
1024 		dev->stream_state = STREAM_OFF;
1025 		set_bit(DEV_INITIALIZED, &dev->dev_state);
1026 	}
1027 	dev->users++;
1028 	mutex_unlock(&dev->lock);
1029 	return ret;
1030 }
1031 
1032 static int au0828_v4l2_close(struct file *filp)
1033 {
1034 	int ret;
1035 	struct au0828_dev *dev = video_drvdata(filp);
1036 	struct video_device *vdev = video_devdata(filp);
1037 
1038 	dprintk(1,
1039 		"%s called std_set %d dev_state %ld stream users %d users %d\n",
1040 		__func__, dev->std_set_in_tuner_core, dev->dev_state,
1041 		dev->streaming_users, dev->users);
1042 
1043 	mutex_lock(&dev->lock);
1044 	if (vdev->vfl_type == VFL_TYPE_VIDEO && dev->vid_timeout_running) {
1045 		/* Cancel timeout thread in case they didn't call streamoff */
1046 		dev->vid_timeout_running = 0;
1047 		del_timer_sync(&dev->vid_timeout);
1048 	} else if (vdev->vfl_type == VFL_TYPE_VBI &&
1049 			dev->vbi_timeout_running) {
1050 		/* Cancel timeout thread in case they didn't call streamoff */
1051 		dev->vbi_timeout_running = 0;
1052 		del_timer_sync(&dev->vbi_timeout);
1053 	}
1054 
1055 	if (test_bit(DEV_DISCONNECTED, &dev->dev_state))
1056 		goto end;
1057 
1058 	if (dev->users == 1) {
1059 		/*
1060 		 * Avoid putting tuner in sleep if DVB or ALSA are
1061 		 * streaming.
1062 		 *
1063 		 * On most USB devices  like au0828 the tuner can
1064 		 * be safely put in sleep state here if ALSA isn't
1065 		 * streaming. Exceptions are some very old USB tuner
1066 		 * models such as em28xx-based WinTV USB2 which have
1067 		 * a separate audio output jack. The devices that have
1068 		 * a separate audio output jack have analog tuners,
1069 		 * like Philips FM1236. Those devices are always on,
1070 		 * so the s_power callback are silently ignored.
1071 		 * So, the current logic here does the following:
1072 		 * Disable (put tuner to sleep) when
1073 		 * - ALSA and DVB aren't streaming.
1074 		 * - the last V4L2 file handler is closed.
1075 		 *
1076 		 * FIXME:
1077 		 *
1078 		 * Additionally, this logic could be improved to
1079 		 * disable the media source if the above conditions
1080 		 * are met and if the device:
1081 		 * - doesn't have a separate audio out plug (or
1082 		 * - doesn't use a silicon tuner like xc2028/3028/4000/5000).
1083 		 *
1084 		 * Once this additional logic is in place, a callback
1085 		 * is needed to enable the media source and power on
1086 		 * the tuner, for radio to work.
1087 		*/
1088 		ret = v4l_enable_media_source(vdev);
1089 		if (ret == 0)
1090 			v4l2_device_call_all(&dev->v4l2_dev, 0, tuner,
1091 					     standby);
1092 		dev->std_set_in_tuner_core = 0;
1093 
1094 		/* When close the device, set the usb intf0 into alt0 to free
1095 		   USB bandwidth */
1096 		ret = usb_set_interface(dev->usbdev, 0, 0);
1097 		if (ret < 0)
1098 			pr_info("Au0828 can't set alternate to 0!\n");
1099 	}
1100 end:
1101 	_vb2_fop_release(filp, NULL);
1102 	dev->users--;
1103 	mutex_unlock(&dev->lock);
1104 	return 0;
1105 }
1106 
1107 /* Must be called with dev->lock held */
1108 static void au0828_init_tuner(struct au0828_dev *dev)
1109 {
1110 	struct v4l2_frequency f = {
1111 		.frequency = dev->ctrl_freq,
1112 		.type = V4L2_TUNER_ANALOG_TV,
1113 	};
1114 
1115 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1116 		dev->std_set_in_tuner_core, dev->dev_state);
1117 
1118 	if (dev->std_set_in_tuner_core)
1119 		return;
1120 	dev->std_set_in_tuner_core = 1;
1121 	i2c_gate_ctrl(dev, 1);
1122 	/* If we've never sent the standard in tuner core, do so now.
1123 	   We don't do this at device probe because we don't want to
1124 	   incur the cost of a firmware load */
1125 	v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_std, dev->std);
1126 	v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, &f);
1127 	i2c_gate_ctrl(dev, 0);
1128 }
1129 
1130 static int au0828_set_format(struct au0828_dev *dev, unsigned int cmd,
1131 			     struct v4l2_format *format)
1132 {
1133 	int ret;
1134 	int width = format->fmt.pix.width;
1135 	int height = format->fmt.pix.height;
1136 
1137 	/* If they are demanding a format other than the one we support,
1138 	   bail out (tvtime asks for UYVY and then retries with YUYV) */
1139 	if (format->fmt.pix.pixelformat != V4L2_PIX_FMT_UYVY)
1140 		return -EINVAL;
1141 
1142 	/* format->fmt.pix.width only support 720 and height 480 */
1143 	if (width != 720)
1144 		width = 720;
1145 	if (height != 480)
1146 		height = 480;
1147 
1148 	format->fmt.pix.width = width;
1149 	format->fmt.pix.height = height;
1150 	format->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY;
1151 	format->fmt.pix.bytesperline = width * 2;
1152 	format->fmt.pix.sizeimage = width * height * 2;
1153 	format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1154 	format->fmt.pix.field = V4L2_FIELD_INTERLACED;
1155 
1156 	if (cmd == VIDIOC_TRY_FMT)
1157 		return 0;
1158 
1159 	/* maybe set new image format, driver current only support 720*480 */
1160 	dev->width = width;
1161 	dev->height = height;
1162 	dev->frame_size = width * height * 2;
1163 	dev->field_size = width * height;
1164 	dev->bytesperline = width * 2;
1165 
1166 	if (dev->stream_state == STREAM_ON) {
1167 		dprintk(1, "VIDIOC_SET_FMT: interrupting stream!\n");
1168 		ret = au0828_stream_interrupt(dev);
1169 		if (ret != 0) {
1170 			dprintk(1, "error interrupting video stream!\n");
1171 			return ret;
1172 		}
1173 	}
1174 
1175 	au0828_analog_stream_enable(dev);
1176 
1177 	return 0;
1178 }
1179 
1180 static int vidioc_querycap(struct file *file, void  *priv,
1181 			   struct v4l2_capability *cap)
1182 {
1183 	struct au0828_dev *dev = video_drvdata(file);
1184 
1185 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1186 		dev->std_set_in_tuner_core, dev->dev_state);
1187 
1188 	strscpy(cap->driver, "au0828", sizeof(cap->driver));
1189 	strscpy(cap->card, dev->board.name, sizeof(cap->card));
1190 	usb_make_path(dev->usbdev, cap->bus_info, sizeof(cap->bus_info));
1191 
1192 	/* set the device capabilities */
1193 	cap->capabilities =
1194 		V4L2_CAP_AUDIO | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING |
1195 		V4L2_CAP_TUNER | V4L2_CAP_VBI_CAPTURE | V4L2_CAP_VIDEO_CAPTURE |
1196 		V4L2_CAP_DEVICE_CAPS;
1197 	return 0;
1198 }
1199 
1200 static int vidioc_enum_fmt_vid_cap(struct file *file, void  *priv,
1201 					struct v4l2_fmtdesc *f)
1202 {
1203 	if (f->index)
1204 		return -EINVAL;
1205 
1206 	dprintk(1, "%s called\n", __func__);
1207 
1208 	f->pixelformat = V4L2_PIX_FMT_UYVY;
1209 
1210 	return 0;
1211 }
1212 
1213 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
1214 					struct v4l2_format *f)
1215 {
1216 	struct au0828_dev *dev = video_drvdata(file);
1217 
1218 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1219 		dev->std_set_in_tuner_core, dev->dev_state);
1220 
1221 	f->fmt.pix.width = dev->width;
1222 	f->fmt.pix.height = dev->height;
1223 	f->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY;
1224 	f->fmt.pix.bytesperline = dev->bytesperline;
1225 	f->fmt.pix.sizeimage = dev->frame_size;
1226 	f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; /* NTSC/PAL */
1227 	f->fmt.pix.field = V4L2_FIELD_INTERLACED;
1228 	return 0;
1229 }
1230 
1231 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
1232 				  struct v4l2_format *f)
1233 {
1234 	struct au0828_dev *dev = video_drvdata(file);
1235 
1236 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1237 		dev->std_set_in_tuner_core, dev->dev_state);
1238 
1239 	return au0828_set_format(dev, VIDIOC_TRY_FMT, f);
1240 }
1241 
1242 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1243 				struct v4l2_format *f)
1244 {
1245 	struct au0828_dev *dev = video_drvdata(file);
1246 	int rc;
1247 
1248 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1249 		dev->std_set_in_tuner_core, dev->dev_state);
1250 
1251 	rc = check_dev(dev);
1252 	if (rc < 0)
1253 		return rc;
1254 
1255 	if (vb2_is_busy(&dev->vb_vidq)) {
1256 		pr_info("%s queue busy\n", __func__);
1257 		rc = -EBUSY;
1258 		goto out;
1259 	}
1260 
1261 	rc = au0828_set_format(dev, VIDIOC_S_FMT, f);
1262 out:
1263 	return rc;
1264 }
1265 
1266 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm)
1267 {
1268 	struct au0828_dev *dev = video_drvdata(file);
1269 
1270 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1271 		dev->std_set_in_tuner_core, dev->dev_state);
1272 
1273 	if (norm == dev->std)
1274 		return 0;
1275 
1276 	if (dev->streaming_users > 0)
1277 		return -EBUSY;
1278 
1279 	dev->std = norm;
1280 
1281 	au0828_init_tuner(dev);
1282 
1283 	i2c_gate_ctrl(dev, 1);
1284 
1285 	/*
1286 	 * FIXME: when we support something other than 60Hz standards,
1287 	 * we are going to have to make the au0828 bridge adjust the size
1288 	 * of its capture buffer, which is currently hardcoded at 720x480
1289 	 */
1290 
1291 	v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_std, norm);
1292 
1293 	i2c_gate_ctrl(dev, 0);
1294 
1295 	return 0;
1296 }
1297 
1298 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm)
1299 {
1300 	struct au0828_dev *dev = video_drvdata(file);
1301 
1302 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1303 		dev->std_set_in_tuner_core, dev->dev_state);
1304 
1305 	*norm = dev->std;
1306 	return 0;
1307 }
1308 
1309 static int vidioc_enum_input(struct file *file, void *priv,
1310 				struct v4l2_input *input)
1311 {
1312 	struct au0828_dev *dev = video_drvdata(file);
1313 	unsigned int tmp;
1314 
1315 	static const char *inames[] = {
1316 		[AU0828_VMUX_UNDEFINED] = "Undefined",
1317 		[AU0828_VMUX_COMPOSITE] = "Composite",
1318 		[AU0828_VMUX_SVIDEO] = "S-Video",
1319 		[AU0828_VMUX_CABLE] = "Cable TV",
1320 		[AU0828_VMUX_TELEVISION] = "Television",
1321 		[AU0828_VMUX_DVB] = "DVB",
1322 	};
1323 
1324 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1325 		dev->std_set_in_tuner_core, dev->dev_state);
1326 
1327 	tmp = input->index;
1328 
1329 	if (tmp >= AU0828_MAX_INPUT)
1330 		return -EINVAL;
1331 	if (AUVI_INPUT(tmp).type == 0)
1332 		return -EINVAL;
1333 
1334 	input->index = tmp;
1335 	strscpy(input->name, inames[AUVI_INPUT(tmp).type], sizeof(input->name));
1336 	if ((AUVI_INPUT(tmp).type == AU0828_VMUX_TELEVISION) ||
1337 	    (AUVI_INPUT(tmp).type == AU0828_VMUX_CABLE)) {
1338 		input->type |= V4L2_INPUT_TYPE_TUNER;
1339 		input->audioset = 1;
1340 	} else {
1341 		input->type |= V4L2_INPUT_TYPE_CAMERA;
1342 		input->audioset = 2;
1343 	}
1344 
1345 	input->std = dev->vdev.tvnorms;
1346 
1347 	return 0;
1348 }
1349 
1350 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1351 {
1352 	struct au0828_dev *dev = video_drvdata(file);
1353 
1354 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1355 		dev->std_set_in_tuner_core, dev->dev_state);
1356 
1357 	*i = dev->ctrl_input;
1358 	return 0;
1359 }
1360 
1361 static void au0828_s_input(struct au0828_dev *dev, int index)
1362 {
1363 	int i;
1364 
1365 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1366 		dev->std_set_in_tuner_core, dev->dev_state);
1367 
1368 	switch (AUVI_INPUT(index).type) {
1369 	case AU0828_VMUX_SVIDEO:
1370 		dev->input_type = AU0828_VMUX_SVIDEO;
1371 		dev->ctrl_ainput = 1;
1372 		break;
1373 	case AU0828_VMUX_COMPOSITE:
1374 		dev->input_type = AU0828_VMUX_COMPOSITE;
1375 		dev->ctrl_ainput = 1;
1376 		break;
1377 	case AU0828_VMUX_TELEVISION:
1378 		dev->input_type = AU0828_VMUX_TELEVISION;
1379 		dev->ctrl_ainput = 0;
1380 		break;
1381 	default:
1382 		dprintk(1, "unknown input type set [%d]\n",
1383 			AUVI_INPUT(index).type);
1384 		return;
1385 	}
1386 
1387 	dev->ctrl_input = index;
1388 
1389 	v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_routing,
1390 			AUVI_INPUT(index).vmux, 0, 0);
1391 
1392 	for (i = 0; i < AU0828_MAX_INPUT; i++) {
1393 		int enable = 0;
1394 		if (AUVI_INPUT(i).audio_setup == NULL)
1395 			continue;
1396 
1397 		if (i == index)
1398 			enable = 1;
1399 		else
1400 			enable = 0;
1401 		if (enable) {
1402 			(AUVI_INPUT(i).audio_setup)(dev, enable);
1403 		} else {
1404 			/* Make sure we leave it turned on if some
1405 			   other input is routed to this callback */
1406 			if ((AUVI_INPUT(i).audio_setup) !=
1407 			    ((AUVI_INPUT(index).audio_setup))) {
1408 				(AUVI_INPUT(i).audio_setup)(dev, enable);
1409 			}
1410 		}
1411 	}
1412 
1413 	v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing,
1414 			AUVI_INPUT(index).amux, 0, 0);
1415 }
1416 
1417 static int vidioc_s_input(struct file *file, void *priv, unsigned int index)
1418 {
1419 	struct au0828_dev *dev = video_drvdata(file);
1420 	struct video_device *vfd = video_devdata(file);
1421 
1422 	dprintk(1, "VIDIOC_S_INPUT in function %s, input=%d\n", __func__,
1423 		index);
1424 	if (index >= AU0828_MAX_INPUT)
1425 		return -EINVAL;
1426 	if (AUVI_INPUT(index).type == 0)
1427 		return -EINVAL;
1428 
1429 	if (dev->ctrl_input == index)
1430 		return 0;
1431 
1432 	au0828_s_input(dev, index);
1433 
1434 	/*
1435 	 * Input has been changed. Disable the media source
1436 	 * associated with the old input and enable source
1437 	 * for the newly set input
1438 	 */
1439 	v4l_disable_media_source(vfd);
1440 	return v4l_enable_media_source(vfd);
1441 }
1442 
1443 static int vidioc_enumaudio(struct file *file, void *priv, struct v4l2_audio *a)
1444 {
1445 	if (a->index > 1)
1446 		return -EINVAL;
1447 
1448 	dprintk(1, "%s called\n", __func__);
1449 
1450 	if (a->index == 0)
1451 		strscpy(a->name, "Television", sizeof(a->name));
1452 	else
1453 		strscpy(a->name, "Line in", sizeof(a->name));
1454 
1455 	a->capability = V4L2_AUDCAP_STEREO;
1456 	return 0;
1457 }
1458 
1459 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1460 {
1461 	struct au0828_dev *dev = video_drvdata(file);
1462 
1463 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1464 		dev->std_set_in_tuner_core, dev->dev_state);
1465 
1466 	a->index = dev->ctrl_ainput;
1467 	if (a->index == 0)
1468 		strscpy(a->name, "Television", sizeof(a->name));
1469 	else
1470 		strscpy(a->name, "Line in", sizeof(a->name));
1471 
1472 	a->capability = V4L2_AUDCAP_STEREO;
1473 	return 0;
1474 }
1475 
1476 static int vidioc_s_audio(struct file *file, void *priv, const struct v4l2_audio *a)
1477 {
1478 	struct au0828_dev *dev = video_drvdata(file);
1479 
1480 	if (a->index != dev->ctrl_ainput)
1481 		return -EINVAL;
1482 
1483 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1484 		dev->std_set_in_tuner_core, dev->dev_state);
1485 	return 0;
1486 }
1487 
1488 static int vidioc_g_tuner(struct file *file, void *priv, struct v4l2_tuner *t)
1489 {
1490 	struct au0828_dev *dev = video_drvdata(file);
1491 	struct video_device *vfd = video_devdata(file);
1492 	int ret;
1493 
1494 	if (t->index != 0)
1495 		return -EINVAL;
1496 
1497 	ret = v4l_enable_media_source(vfd);
1498 	if (ret)
1499 		return ret;
1500 
1501 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1502 		dev->std_set_in_tuner_core, dev->dev_state);
1503 
1504 	strscpy(t->name, "Auvitek tuner", sizeof(t->name));
1505 
1506 	au0828_init_tuner(dev);
1507 	i2c_gate_ctrl(dev, 1);
1508 	v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t);
1509 	i2c_gate_ctrl(dev, 0);
1510 	return 0;
1511 }
1512 
1513 static int vidioc_s_tuner(struct file *file, void *priv,
1514 				const struct v4l2_tuner *t)
1515 {
1516 	struct au0828_dev *dev = video_drvdata(file);
1517 
1518 	if (t->index != 0)
1519 		return -EINVAL;
1520 
1521 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1522 		dev->std_set_in_tuner_core, dev->dev_state);
1523 
1524 	au0828_init_tuner(dev);
1525 	i2c_gate_ctrl(dev, 1);
1526 	v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t);
1527 	i2c_gate_ctrl(dev, 0);
1528 
1529 	dprintk(1, "VIDIOC_S_TUNER: signal = %x, afc = %x\n", t->signal,
1530 		t->afc);
1531 
1532 	return 0;
1533 
1534 }
1535 
1536 static int vidioc_g_frequency(struct file *file, void *priv,
1537 				struct v4l2_frequency *freq)
1538 {
1539 	struct au0828_dev *dev = video_drvdata(file);
1540 
1541 	if (freq->tuner != 0)
1542 		return -EINVAL;
1543 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1544 		dev->std_set_in_tuner_core, dev->dev_state);
1545 	freq->frequency = dev->ctrl_freq;
1546 	return 0;
1547 }
1548 
1549 static int vidioc_s_frequency(struct file *file, void *priv,
1550 				const struct v4l2_frequency *freq)
1551 {
1552 	struct au0828_dev *dev = video_drvdata(file);
1553 	struct v4l2_frequency new_freq = *freq;
1554 
1555 	if (freq->tuner != 0)
1556 		return -EINVAL;
1557 
1558 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1559 		dev->std_set_in_tuner_core, dev->dev_state);
1560 
1561 	au0828_init_tuner(dev);
1562 	i2c_gate_ctrl(dev, 1);
1563 
1564 	v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, freq);
1565 	/* Get the actual set (and possibly clamped) frequency */
1566 	v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_frequency, &new_freq);
1567 	dev->ctrl_freq = new_freq.frequency;
1568 
1569 	i2c_gate_ctrl(dev, 0);
1570 
1571 	au0828_analog_stream_reset(dev);
1572 
1573 	return 0;
1574 }
1575 
1576 
1577 /* RAW VBI ioctls */
1578 
1579 static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
1580 				struct v4l2_format *format)
1581 {
1582 	struct au0828_dev *dev = video_drvdata(file);
1583 
1584 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1585 		dev->std_set_in_tuner_core, dev->dev_state);
1586 
1587 	format->fmt.vbi.samples_per_line = dev->vbi_width;
1588 	format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
1589 	format->fmt.vbi.offset = 0;
1590 	format->fmt.vbi.flags = 0;
1591 	format->fmt.vbi.sampling_rate = 6750000 * 4 / 2;
1592 
1593 	format->fmt.vbi.count[0] = dev->vbi_height;
1594 	format->fmt.vbi.count[1] = dev->vbi_height;
1595 	format->fmt.vbi.start[0] = 21;
1596 	format->fmt.vbi.start[1] = 284;
1597 	memset(format->fmt.vbi.reserved, 0, sizeof(format->fmt.vbi.reserved));
1598 
1599 	return 0;
1600 }
1601 
1602 static int vidioc_g_pixelaspect(struct file *file, void *priv,
1603 				int type, struct v4l2_fract *f)
1604 {
1605 	struct au0828_dev *dev = video_drvdata(file);
1606 
1607 	if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1608 		return -EINVAL;
1609 
1610 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1611 		dev->std_set_in_tuner_core, dev->dev_state);
1612 
1613 	f->numerator = 54;
1614 	f->denominator = 59;
1615 
1616 	return 0;
1617 }
1618 
1619 static int vidioc_g_selection(struct file *file, void *priv,
1620 			      struct v4l2_selection *s)
1621 {
1622 	struct au0828_dev *dev = video_drvdata(file);
1623 
1624 	if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1625 		return -EINVAL;
1626 
1627 	switch (s->target) {
1628 	case V4L2_SEL_TGT_CROP_BOUNDS:
1629 	case V4L2_SEL_TGT_CROP_DEFAULT:
1630 		s->r.left = 0;
1631 		s->r.top = 0;
1632 		s->r.width = dev->width;
1633 		s->r.height = dev->height;
1634 		break;
1635 	default:
1636 		return -EINVAL;
1637 	}
1638 	return 0;
1639 }
1640 
1641 #ifdef CONFIG_VIDEO_ADV_DEBUG
1642 static int vidioc_g_register(struct file *file, void *priv,
1643 			     struct v4l2_dbg_register *reg)
1644 {
1645 	struct au0828_dev *dev = video_drvdata(file);
1646 
1647 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1648 		dev->std_set_in_tuner_core, dev->dev_state);
1649 
1650 	reg->val = au0828_read(dev, reg->reg);
1651 	reg->size = 1;
1652 	return 0;
1653 }
1654 
1655 static int vidioc_s_register(struct file *file, void *priv,
1656 			     const struct v4l2_dbg_register *reg)
1657 {
1658 	struct au0828_dev *dev = video_drvdata(file);
1659 
1660 	dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
1661 		dev->std_set_in_tuner_core, dev->dev_state);
1662 
1663 	return au0828_writereg(dev, reg->reg, reg->val);
1664 }
1665 #endif
1666 
1667 static int vidioc_log_status(struct file *file, void *fh)
1668 {
1669 	struct video_device *vdev = video_devdata(file);
1670 
1671 	dprintk(1, "%s called\n", __func__);
1672 
1673 	v4l2_ctrl_log_status(file, fh);
1674 	v4l2_device_call_all(vdev->v4l2_dev, 0, core, log_status);
1675 	return 0;
1676 }
1677 
1678 void au0828_v4l2_suspend(struct au0828_dev *dev)
1679 {
1680 	struct urb *urb;
1681 	int i;
1682 
1683 	pr_info("stopping V4L2\n");
1684 
1685 	if (dev->stream_state == STREAM_ON) {
1686 		pr_info("stopping V4L2 active URBs\n");
1687 		au0828_analog_stream_disable(dev);
1688 		/* stop urbs */
1689 		for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
1690 			urb = dev->isoc_ctl.urb[i];
1691 			if (urb) {
1692 				if (!irqs_disabled())
1693 					usb_kill_urb(urb);
1694 				else
1695 					usb_unlink_urb(urb);
1696 			}
1697 		}
1698 	}
1699 
1700 	if (dev->vid_timeout_running)
1701 		del_timer_sync(&dev->vid_timeout);
1702 	if (dev->vbi_timeout_running)
1703 		del_timer_sync(&dev->vbi_timeout);
1704 }
1705 
1706 void au0828_v4l2_resume(struct au0828_dev *dev)
1707 {
1708 	int i, rc;
1709 
1710 	pr_info("restarting V4L2\n");
1711 
1712 	if (dev->stream_state == STREAM_ON) {
1713 		au0828_stream_interrupt(dev);
1714 		au0828_init_tuner(dev);
1715 	}
1716 
1717 	if (dev->vid_timeout_running)
1718 		mod_timer(&dev->vid_timeout, jiffies + (HZ / 10));
1719 	if (dev->vbi_timeout_running)
1720 		mod_timer(&dev->vbi_timeout, jiffies + (HZ / 10));
1721 
1722 	/* If we were doing ac97 instead of i2s, it would go here...*/
1723 	au0828_i2s_init(dev);
1724 
1725 	au0828_analog_stream_enable(dev);
1726 
1727 	if (!(dev->stream_state == STREAM_ON)) {
1728 		au0828_analog_stream_reset(dev);
1729 		/* submit urbs */
1730 		for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
1731 			rc = usb_submit_urb(dev->isoc_ctl.urb[i], GFP_ATOMIC);
1732 			if (rc) {
1733 				au0828_isocdbg("submit of urb %i failed (error=%i)\n",
1734 					       i, rc);
1735 				au0828_uninit_isoc(dev);
1736 			}
1737 		}
1738 	}
1739 }
1740 
1741 static const struct v4l2_file_operations au0828_v4l_fops = {
1742 	.owner      = THIS_MODULE,
1743 	.open       = au0828_v4l2_open,
1744 	.release    = au0828_v4l2_close,
1745 	.read       = vb2_fop_read,
1746 	.poll       = vb2_fop_poll,
1747 	.mmap       = vb2_fop_mmap,
1748 	.unlocked_ioctl = video_ioctl2,
1749 };
1750 
1751 static const struct v4l2_ioctl_ops video_ioctl_ops = {
1752 	.vidioc_querycap            = vidioc_querycap,
1753 	.vidioc_enum_fmt_vid_cap    = vidioc_enum_fmt_vid_cap,
1754 	.vidioc_g_fmt_vid_cap       = vidioc_g_fmt_vid_cap,
1755 	.vidioc_try_fmt_vid_cap     = vidioc_try_fmt_vid_cap,
1756 	.vidioc_s_fmt_vid_cap       = vidioc_s_fmt_vid_cap,
1757 	.vidioc_g_fmt_vbi_cap       = vidioc_g_fmt_vbi_cap,
1758 	.vidioc_try_fmt_vbi_cap     = vidioc_g_fmt_vbi_cap,
1759 	.vidioc_s_fmt_vbi_cap       = vidioc_g_fmt_vbi_cap,
1760 	.vidioc_enumaudio           = vidioc_enumaudio,
1761 	.vidioc_g_audio             = vidioc_g_audio,
1762 	.vidioc_s_audio             = vidioc_s_audio,
1763 	.vidioc_g_pixelaspect       = vidioc_g_pixelaspect,
1764 	.vidioc_g_selection         = vidioc_g_selection,
1765 
1766 	.vidioc_reqbufs             = vb2_ioctl_reqbufs,
1767 	.vidioc_create_bufs         = vb2_ioctl_create_bufs,
1768 	.vidioc_prepare_buf         = vb2_ioctl_prepare_buf,
1769 	.vidioc_querybuf            = vb2_ioctl_querybuf,
1770 	.vidioc_qbuf                = vb2_ioctl_qbuf,
1771 	.vidioc_dqbuf               = vb2_ioctl_dqbuf,
1772 	.vidioc_expbuf               = vb2_ioctl_expbuf,
1773 
1774 	.vidioc_s_std               = vidioc_s_std,
1775 	.vidioc_g_std               = vidioc_g_std,
1776 	.vidioc_enum_input          = vidioc_enum_input,
1777 	.vidioc_g_input             = vidioc_g_input,
1778 	.vidioc_s_input             = vidioc_s_input,
1779 
1780 	.vidioc_streamon            = vb2_ioctl_streamon,
1781 	.vidioc_streamoff           = vb2_ioctl_streamoff,
1782 
1783 	.vidioc_g_tuner             = vidioc_g_tuner,
1784 	.vidioc_s_tuner             = vidioc_s_tuner,
1785 	.vidioc_g_frequency         = vidioc_g_frequency,
1786 	.vidioc_s_frequency         = vidioc_s_frequency,
1787 #ifdef CONFIG_VIDEO_ADV_DEBUG
1788 	.vidioc_g_register          = vidioc_g_register,
1789 	.vidioc_s_register          = vidioc_s_register,
1790 #endif
1791 	.vidioc_log_status	    = vidioc_log_status,
1792 	.vidioc_subscribe_event     = v4l2_ctrl_subscribe_event,
1793 	.vidioc_unsubscribe_event   = v4l2_event_unsubscribe,
1794 };
1795 
1796 static const struct video_device au0828_video_template = {
1797 	.fops                       = &au0828_v4l_fops,
1798 	.release                    = video_device_release_empty,
1799 	.ioctl_ops		    = &video_ioctl_ops,
1800 	.tvnorms                    = V4L2_STD_NTSC_M | V4L2_STD_PAL_M,
1801 };
1802 
1803 static int au0828_vb2_setup(struct au0828_dev *dev)
1804 {
1805 	int rc;
1806 	struct vb2_queue *q;
1807 
1808 	/* Setup Videobuf2 for Video capture */
1809 	q = &dev->vb_vidq;
1810 	q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1811 	q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1812 	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1813 	q->drv_priv = dev;
1814 	q->buf_struct_size = sizeof(struct au0828_buffer);
1815 	q->ops = &au0828_video_qops;
1816 	q->mem_ops = &vb2_vmalloc_memops;
1817 
1818 	rc = vb2_queue_init(q);
1819 	if (rc < 0)
1820 		return rc;
1821 
1822 	/* Setup Videobuf2 for VBI capture */
1823 	q = &dev->vb_vbiq;
1824 	q->type = V4L2_BUF_TYPE_VBI_CAPTURE;
1825 	q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1826 	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1827 	q->drv_priv = dev;
1828 	q->buf_struct_size = sizeof(struct au0828_buffer);
1829 	q->ops = &au0828_vbi_qops;
1830 	q->mem_ops = &vb2_vmalloc_memops;
1831 
1832 	rc = vb2_queue_init(q);
1833 	if (rc < 0)
1834 		return rc;
1835 
1836 	return 0;
1837 }
1838 
1839 static void au0828_analog_create_entities(struct au0828_dev *dev)
1840 {
1841 #if defined(CONFIG_MEDIA_CONTROLLER)
1842 	static const char * const inames[] = {
1843 		[AU0828_VMUX_COMPOSITE] = "Composite",
1844 		[AU0828_VMUX_SVIDEO] = "S-Video",
1845 		[AU0828_VMUX_CABLE] = "Cable TV",
1846 		[AU0828_VMUX_TELEVISION] = "Television",
1847 		[AU0828_VMUX_DVB] = "DVB",
1848 	};
1849 	int ret, i;
1850 
1851 	/* Initialize Video and VBI pads */
1852 	dev->video_pad.flags = MEDIA_PAD_FL_SINK;
1853 	ret = media_entity_pads_init(&dev->vdev.entity, 1, &dev->video_pad);
1854 	if (ret < 0)
1855 		pr_err("failed to initialize video media entity!\n");
1856 
1857 	dev->vbi_pad.flags = MEDIA_PAD_FL_SINK;
1858 	ret = media_entity_pads_init(&dev->vbi_dev.entity, 1, &dev->vbi_pad);
1859 	if (ret < 0)
1860 		pr_err("failed to initialize vbi media entity!\n");
1861 
1862 	/* Create entities for each input connector */
1863 	for (i = 0; i < AU0828_MAX_INPUT; i++) {
1864 		struct media_entity *ent = &dev->input_ent[i];
1865 
1866 		if (AUVI_INPUT(i).type == AU0828_VMUX_UNDEFINED)
1867 			break;
1868 
1869 		ent->name = inames[AUVI_INPUT(i).type];
1870 		ent->flags = MEDIA_ENT_FL_CONNECTOR;
1871 		dev->input_pad[i].flags = MEDIA_PAD_FL_SOURCE;
1872 
1873 		switch (AUVI_INPUT(i).type) {
1874 		case AU0828_VMUX_COMPOSITE:
1875 			ent->function = MEDIA_ENT_F_CONN_COMPOSITE;
1876 			break;
1877 		case AU0828_VMUX_SVIDEO:
1878 			ent->function = MEDIA_ENT_F_CONN_SVIDEO;
1879 			break;
1880 		case AU0828_VMUX_CABLE:
1881 		case AU0828_VMUX_TELEVISION:
1882 		case AU0828_VMUX_DVB:
1883 		default: /* Just to shut up a warning */
1884 			ent->function = MEDIA_ENT_F_CONN_RF;
1885 			break;
1886 		}
1887 
1888 		ret = media_entity_pads_init(ent, 1, &dev->input_pad[i]);
1889 		if (ret < 0)
1890 			pr_err("failed to initialize input pad[%d]!\n", i);
1891 
1892 		ret = media_device_register_entity(dev->media_dev, ent);
1893 		if (ret < 0)
1894 			pr_err("failed to register input entity %d!\n", i);
1895 	}
1896 #endif
1897 }
1898 
1899 /**************************************************************************/
1900 
1901 int au0828_analog_register(struct au0828_dev *dev,
1902 			   struct usb_interface *interface)
1903 {
1904 	int retval = -ENOMEM;
1905 	struct usb_host_interface *iface_desc;
1906 	struct usb_endpoint_descriptor *endpoint;
1907 	int i, ret;
1908 
1909 	dprintk(1, "au0828_analog_register called for intf#%d!\n",
1910 		interface->cur_altsetting->desc.bInterfaceNumber);
1911 
1912 	/* No analog TV */
1913 	if (AUVI_INPUT(0).type == AU0828_VMUX_UNDEFINED)
1914 		return 0;
1915 
1916 	/* set au0828 usb interface0 to as5 */
1917 	retval = usb_set_interface(dev->usbdev,
1918 			interface->cur_altsetting->desc.bInterfaceNumber, 5);
1919 	if (retval != 0) {
1920 		pr_info("Failure setting usb interface0 to as5\n");
1921 		return retval;
1922 	}
1923 
1924 	/* Figure out which endpoint has the isoc interface */
1925 	iface_desc = interface->cur_altsetting;
1926 	for (i = 0; i < iface_desc->desc.bNumEndpoints; i++) {
1927 		endpoint = &iface_desc->endpoint[i].desc;
1928 		if (((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
1929 		     == USB_DIR_IN) &&
1930 		    ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
1931 		     == USB_ENDPOINT_XFER_ISOC)) {
1932 
1933 			/* we find our isoc in endpoint */
1934 			u16 tmp = le16_to_cpu(endpoint->wMaxPacketSize);
1935 			dev->max_pkt_size = (tmp & 0x07ff) *
1936 				(((tmp & 0x1800) >> 11) + 1);
1937 			dev->isoc_in_endpointaddr = endpoint->bEndpointAddress;
1938 			dprintk(1,
1939 				"Found isoc endpoint 0x%02x, max size = %d\n",
1940 				dev->isoc_in_endpointaddr, dev->max_pkt_size);
1941 		}
1942 	}
1943 	if (!(dev->isoc_in_endpointaddr)) {
1944 		pr_info("Could not locate isoc endpoint\n");
1945 		return -ENODEV;
1946 	}
1947 
1948 	init_waitqueue_head(&dev->open);
1949 	spin_lock_init(&dev->slock);
1950 
1951 	/* init video dma queues */
1952 	INIT_LIST_HEAD(&dev->vidq.active);
1953 	INIT_LIST_HEAD(&dev->vbiq.active);
1954 
1955 	timer_setup(&dev->vid_timeout, au0828_vid_buffer_timeout, 0);
1956 	timer_setup(&dev->vbi_timeout, au0828_vbi_buffer_timeout, 0);
1957 
1958 	dev->width = NTSC_STD_W;
1959 	dev->height = NTSC_STD_H;
1960 	dev->field_size = dev->width * dev->height;
1961 	dev->frame_size = dev->field_size << 1;
1962 	dev->bytesperline = dev->width << 1;
1963 	dev->vbi_width = 720;
1964 	dev->vbi_height = 1;
1965 	dev->ctrl_ainput = 0;
1966 	dev->ctrl_freq = 960;
1967 	dev->std = V4L2_STD_NTSC_M;
1968 	/* Default input is TV Tuner */
1969 	au0828_s_input(dev, 0);
1970 
1971 	mutex_init(&dev->vb_queue_lock);
1972 	mutex_init(&dev->vb_vbi_queue_lock);
1973 
1974 	/* Fill the video capture device struct */
1975 	dev->vdev = au0828_video_template;
1976 	dev->vdev.v4l2_dev = &dev->v4l2_dev;
1977 	dev->vdev.lock = &dev->lock;
1978 	dev->vdev.queue = &dev->vb_vidq;
1979 	dev->vdev.queue->lock = &dev->vb_queue_lock;
1980 	dev->vdev.device_caps =
1981 		V4L2_CAP_AUDIO | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING |
1982 		V4L2_CAP_TUNER | V4L2_CAP_VIDEO_CAPTURE;
1983 	strscpy(dev->vdev.name, "au0828a video", sizeof(dev->vdev.name));
1984 
1985 	/* Setup the VBI device */
1986 	dev->vbi_dev = au0828_video_template;
1987 	dev->vbi_dev.v4l2_dev = &dev->v4l2_dev;
1988 	dev->vbi_dev.lock = &dev->lock;
1989 	dev->vbi_dev.queue = &dev->vb_vbiq;
1990 	dev->vbi_dev.queue->lock = &dev->vb_vbi_queue_lock;
1991 	dev->vbi_dev.device_caps =
1992 		V4L2_CAP_AUDIO | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING |
1993 		V4L2_CAP_TUNER | V4L2_CAP_VBI_CAPTURE;
1994 	strscpy(dev->vbi_dev.name, "au0828a vbi", sizeof(dev->vbi_dev.name));
1995 
1996 	/* Init entities at the Media Controller */
1997 	au0828_analog_create_entities(dev);
1998 
1999 	/* initialize videobuf2 stuff */
2000 	retval = au0828_vb2_setup(dev);
2001 	if (retval != 0) {
2002 		dprintk(1, "unable to setup videobuf2 queues (error = %d).\n",
2003 			retval);
2004 		return -ENODEV;
2005 	}
2006 
2007 	/* Register the v4l2 device */
2008 	video_set_drvdata(&dev->vdev, dev);
2009 	retval = video_register_device(&dev->vdev, VFL_TYPE_VIDEO, -1);
2010 	if (retval != 0) {
2011 		dprintk(1, "unable to register video device (error = %d).\n",
2012 			retval);
2013 		return -ENODEV;
2014 	}
2015 
2016 	/* Register the vbi device */
2017 	video_set_drvdata(&dev->vbi_dev, dev);
2018 	retval = video_register_device(&dev->vbi_dev, VFL_TYPE_VBI, -1);
2019 	if (retval != 0) {
2020 		dprintk(1, "unable to register vbi device (error = %d).\n",
2021 			retval);
2022 		ret = -ENODEV;
2023 		goto err_reg_vbi_dev;
2024 	}
2025 
2026 #ifdef CONFIG_MEDIA_CONTROLLER
2027 	retval = v4l2_mc_create_media_graph(dev->media_dev);
2028 	if (retval) {
2029 		pr_err("%s() au0282_dev_register failed to create graph\n",
2030 			__func__);
2031 		ret = -ENODEV;
2032 		goto err_reg_vbi_dev;
2033 	}
2034 #endif
2035 
2036 	dprintk(1, "%s completed!\n", __func__);
2037 
2038 	return 0;
2039 
2040 err_reg_vbi_dev:
2041 	vb2_video_unregister_device(&dev->vdev);
2042 	return ret;
2043 }
2044 
2045