1 /*
2    cx231xx-video.c - driver for Conexant Cx23100/101/102
3 		     USB video capture devices
4 
5    Copyright (C) 2008 <srinivasa.deevi at conexant dot com>
6 	Based on em28xx driver
7 	Based on cx23885 driver
8 	Based on cx88 driver
9 
10    This program is free software; you can redistribute it and/or modify
11    it under the terms of the GNU General Public License as published by
12    the Free Software Foundation; either version 2 of the License, or
13    (at your option) any later version.
14 
15    This program is distributed in the hope that it will be useful,
16    but WITHOUT ANY WARRANTY; without even the implied warranty of
17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18    GNU General Public License for more details.
19 
20    You should have received a copy of the GNU General Public License
21    along with this program; if not, write to the Free Software
22    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23  */
24 
25 #include <linux/init.h>
26 #include <linux/list.h>
27 #include <linux/module.h>
28 #include <linux/kernel.h>
29 #include <linux/bitmap.h>
30 #include <linux/usb.h>
31 #include <linux/i2c.h>
32 #include <linux/mm.h>
33 #include <linux/mutex.h>
34 #include <linux/slab.h>
35 
36 #include <media/v4l2-common.h>
37 #include <media/v4l2-ioctl.h>
38 #include <media/v4l2-event.h>
39 #include <media/msp3400.h>
40 #include <media/tuner.h>
41 
42 #include "dvb_frontend.h"
43 
44 #include "cx231xx.h"
45 #include "cx231xx-vbi.h"
46 
47 #define CX231XX_VERSION "0.0.2"
48 
49 #define DRIVER_AUTHOR   "Srinivasa Deevi <srinivasa.deevi@conexant.com>"
50 #define DRIVER_DESC     "Conexant cx231xx based USB video device driver"
51 
52 #define cx231xx_videodbg(fmt, arg...) do {\
53 	if (video_debug) \
54 		printk(KERN_INFO "%s %s :"fmt, \
55 			 dev->name, __func__ , ##arg); } while (0)
56 
57 static unsigned int isoc_debug;
58 module_param(isoc_debug, int, 0644);
59 MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
60 
61 #define cx231xx_isocdbg(fmt, arg...) \
62 do {\
63 	if (isoc_debug) { \
64 		printk(KERN_INFO "%s %s :"fmt, \
65 			 dev->name, __func__ , ##arg); \
66 	} \
67   } while (0)
68 
69 MODULE_AUTHOR(DRIVER_AUTHOR);
70 MODULE_DESCRIPTION(DRIVER_DESC);
71 MODULE_LICENSE("GPL");
72 MODULE_VERSION(CX231XX_VERSION);
73 
74 static unsigned int card[]     = {[0 ... (CX231XX_MAXBOARDS - 1)] = UNSET };
75 static unsigned int video_nr[] = {[0 ... (CX231XX_MAXBOARDS - 1)] = UNSET };
76 static unsigned int vbi_nr[]   = {[0 ... (CX231XX_MAXBOARDS - 1)] = UNSET };
77 static unsigned int radio_nr[] = {[0 ... (CX231XX_MAXBOARDS - 1)] = UNSET };
78 
79 module_param_array(card, int, NULL, 0444);
80 module_param_array(video_nr, int, NULL, 0444);
81 module_param_array(vbi_nr, int, NULL, 0444);
82 module_param_array(radio_nr, int, NULL, 0444);
83 
84 MODULE_PARM_DESC(card, "card type");
85 MODULE_PARM_DESC(video_nr, "video device numbers");
86 MODULE_PARM_DESC(vbi_nr, "vbi device numbers");
87 MODULE_PARM_DESC(radio_nr, "radio device numbers");
88 
89 static unsigned int video_debug;
90 module_param(video_debug, int, 0644);
91 MODULE_PARM_DESC(video_debug, "enable debug messages [video]");
92 
93 /* supported video standards */
94 static struct cx231xx_fmt format[] = {
95 	{
96 	 .name = "16bpp YUY2, 4:2:2, packed",
97 	 .fourcc = V4L2_PIX_FMT_YUYV,
98 	 .depth = 16,
99 	 .reg = 0,
100 	 },
101 };
102 
103 
104 /* ------------------------------------------------------------------
105 	Video buffer and parser functions
106    ------------------------------------------------------------------*/
107 
108 /*
109  * Announces that a buffer were filled and request the next
110  */
111 static inline void buffer_filled(struct cx231xx *dev,
112 				 struct cx231xx_dmaqueue *dma_q,
113 				 struct cx231xx_buffer *buf)
114 {
115 	/* Advice that buffer was filled */
116 	cx231xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i);
117 	buf->vb.state = VIDEOBUF_DONE;
118 	buf->vb.field_count++;
119 	v4l2_get_timestamp(&buf->vb.ts);
120 
121 	if (dev->USE_ISO)
122 		dev->video_mode.isoc_ctl.buf = NULL;
123 	else
124 		dev->video_mode.bulk_ctl.buf = NULL;
125 
126 	list_del(&buf->vb.queue);
127 	wake_up(&buf->vb.done);
128 }
129 
130 static inline void print_err_status(struct cx231xx *dev, int packet, int status)
131 {
132 	char *errmsg = "Unknown";
133 
134 	switch (status) {
135 	case -ENOENT:
136 		errmsg = "unlinked synchronuously";
137 		break;
138 	case -ECONNRESET:
139 		errmsg = "unlinked asynchronuously";
140 		break;
141 	case -ENOSR:
142 		errmsg = "Buffer error (overrun)";
143 		break;
144 	case -EPIPE:
145 		errmsg = "Stalled (device not responding)";
146 		break;
147 	case -EOVERFLOW:
148 		errmsg = "Babble (bad cable?)";
149 		break;
150 	case -EPROTO:
151 		errmsg = "Bit-stuff error (bad cable?)";
152 		break;
153 	case -EILSEQ:
154 		errmsg = "CRC/Timeout (could be anything)";
155 		break;
156 	case -ETIME:
157 		errmsg = "Device does not respond";
158 		break;
159 	}
160 	if (packet < 0) {
161 		cx231xx_isocdbg("URB status %d [%s].\n", status, errmsg);
162 	} else {
163 		cx231xx_isocdbg("URB packet %d, status %d [%s].\n",
164 				packet, status, errmsg);
165 	}
166 }
167 
168 /*
169  * video-buf generic routine to get the next available buffer
170  */
171 static inline void get_next_buf(struct cx231xx_dmaqueue *dma_q,
172 				struct cx231xx_buffer **buf)
173 {
174 	struct cx231xx_video_mode *vmode =
175 	    container_of(dma_q, struct cx231xx_video_mode, vidq);
176 	struct cx231xx *dev = container_of(vmode, struct cx231xx, video_mode);
177 
178 	char *outp;
179 
180 	if (list_empty(&dma_q->active)) {
181 		cx231xx_isocdbg("No active queue to serve\n");
182 		if (dev->USE_ISO)
183 			dev->video_mode.isoc_ctl.buf = NULL;
184 		else
185 			dev->video_mode.bulk_ctl.buf = NULL;
186 		*buf = NULL;
187 		return;
188 	}
189 
190 	/* Get the next buffer */
191 	*buf = list_entry(dma_q->active.next, struct cx231xx_buffer, vb.queue);
192 
193 	/* Cleans up buffer - Useful for testing for frame/URB loss */
194 	outp = videobuf_to_vmalloc(&(*buf)->vb);
195 	memset(outp, 0, (*buf)->vb.size);
196 
197 	if (dev->USE_ISO)
198 		dev->video_mode.isoc_ctl.buf = *buf;
199 	else
200 		dev->video_mode.bulk_ctl.buf = *buf;
201 
202 	return;
203 }
204 
205 /*
206  * Controls the isoc copy of each urb packet
207  */
208 static inline int cx231xx_isoc_copy(struct cx231xx *dev, struct urb *urb)
209 {
210 	struct cx231xx_dmaqueue *dma_q = urb->context;
211 	int i;
212 	unsigned char *p_buffer;
213 	u32 bytes_parsed = 0, buffer_size = 0;
214 	u8 sav_eav = 0;
215 
216 	if (!dev)
217 		return 0;
218 
219 	if (dev->state & DEV_DISCONNECTED)
220 		return 0;
221 
222 	if (urb->status < 0) {
223 		print_err_status(dev, -1, urb->status);
224 		if (urb->status == -ENOENT)
225 			return 0;
226 	}
227 
228 	for (i = 0; i < urb->number_of_packets; i++) {
229 		int status = urb->iso_frame_desc[i].status;
230 
231 		if (status < 0) {
232 			print_err_status(dev, i, status);
233 			if (urb->iso_frame_desc[i].status != -EPROTO)
234 				continue;
235 		}
236 
237 		if (urb->iso_frame_desc[i].actual_length <= 0) {
238 			/* cx231xx_isocdbg("packet %d is empty",i); - spammy */
239 			continue;
240 		}
241 		if (urb->iso_frame_desc[i].actual_length >
242 		    dev->video_mode.max_pkt_size) {
243 			cx231xx_isocdbg("packet bigger than packet size");
244 			continue;
245 		}
246 
247 		/*  get buffer pointer and length */
248 		p_buffer = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
249 		buffer_size = urb->iso_frame_desc[i].actual_length;
250 		bytes_parsed = 0;
251 
252 		if (dma_q->is_partial_line) {
253 			/* Handle the case of a partial line */
254 			sav_eav = dma_q->last_sav;
255 		} else {
256 			/* Check for a SAV/EAV overlapping
257 				the buffer boundary */
258 			sav_eav =
259 			    cx231xx_find_boundary_SAV_EAV(p_buffer,
260 							  dma_q->partial_buf,
261 							  &bytes_parsed);
262 		}
263 
264 		sav_eav &= 0xF0;
265 		/* Get the first line if we have some portion of an SAV/EAV from
266 		   the last buffer or a partial line  */
267 		if (sav_eav) {
268 			bytes_parsed += cx231xx_get_video_line(dev, dma_q,
269 				sav_eav,	/* SAV/EAV */
270 				p_buffer + bytes_parsed,	/* p_buffer */
271 				buffer_size - bytes_parsed);/* buf size */
272 		}
273 
274 		/* Now parse data that is completely in this buffer */
275 		/* dma_q->is_partial_line = 0;  */
276 
277 		while (bytes_parsed < buffer_size) {
278 			u32 bytes_used = 0;
279 
280 			sav_eav = cx231xx_find_next_SAV_EAV(
281 				p_buffer + bytes_parsed,	/* p_buffer */
282 				buffer_size - bytes_parsed,	/* buf size */
283 				&bytes_used);/* bytes used to get SAV/EAV */
284 
285 			bytes_parsed += bytes_used;
286 
287 			sav_eav &= 0xF0;
288 			if (sav_eav && (bytes_parsed < buffer_size)) {
289 				bytes_parsed += cx231xx_get_video_line(dev,
290 					dma_q, sav_eav,	/* SAV/EAV */
291 					p_buffer + bytes_parsed,/* p_buffer */
292 					buffer_size - bytes_parsed);/*buf size*/
293 			}
294 		}
295 
296 		/* Save the last four bytes of the buffer so we can check the
297 		   buffer boundary condition next time */
298 		memcpy(dma_q->partial_buf, p_buffer + buffer_size - 4, 4);
299 		bytes_parsed = 0;
300 
301 	}
302 	return 1;
303 }
304 
305 static inline int cx231xx_bulk_copy(struct cx231xx *dev, struct urb *urb)
306 {
307 	struct cx231xx_dmaqueue *dma_q = urb->context;
308 	unsigned char *p_buffer;
309 	u32 bytes_parsed = 0, buffer_size = 0;
310 	u8 sav_eav = 0;
311 
312 	if (!dev)
313 		return 0;
314 
315 	if (dev->state & DEV_DISCONNECTED)
316 		return 0;
317 
318 	if (urb->status < 0) {
319 		print_err_status(dev, -1, urb->status);
320 		if (urb->status == -ENOENT)
321 			return 0;
322 	}
323 
324 	if (1) {
325 
326 		/*  get buffer pointer and length */
327 		p_buffer = urb->transfer_buffer;
328 		buffer_size = urb->actual_length;
329 		bytes_parsed = 0;
330 
331 		if (dma_q->is_partial_line) {
332 			/* Handle the case of a partial line */
333 			sav_eav = dma_q->last_sav;
334 		} else {
335 			/* Check for a SAV/EAV overlapping
336 				the buffer boundary */
337 			sav_eav =
338 			    cx231xx_find_boundary_SAV_EAV(p_buffer,
339 							  dma_q->partial_buf,
340 							  &bytes_parsed);
341 		}
342 
343 		sav_eav &= 0xF0;
344 		/* Get the first line if we have some portion of an SAV/EAV from
345 		   the last buffer or a partial line  */
346 		if (sav_eav) {
347 			bytes_parsed += cx231xx_get_video_line(dev, dma_q,
348 				sav_eav,	/* SAV/EAV */
349 				p_buffer + bytes_parsed,	/* p_buffer */
350 				buffer_size - bytes_parsed);/* buf size */
351 		}
352 
353 		/* Now parse data that is completely in this buffer */
354 		/* dma_q->is_partial_line = 0;  */
355 
356 		while (bytes_parsed < buffer_size) {
357 			u32 bytes_used = 0;
358 
359 			sav_eav = cx231xx_find_next_SAV_EAV(
360 				p_buffer + bytes_parsed,	/* p_buffer */
361 				buffer_size - bytes_parsed,	/* buf size */
362 				&bytes_used);/* bytes used to get SAV/EAV */
363 
364 			bytes_parsed += bytes_used;
365 
366 			sav_eav &= 0xF0;
367 			if (sav_eav && (bytes_parsed < buffer_size)) {
368 				bytes_parsed += cx231xx_get_video_line(dev,
369 					dma_q, sav_eav,	/* SAV/EAV */
370 					p_buffer + bytes_parsed,/* p_buffer */
371 					buffer_size - bytes_parsed);/*buf size*/
372 			}
373 		}
374 
375 		/* Save the last four bytes of the buffer so we can check the
376 		   buffer boundary condition next time */
377 		memcpy(dma_q->partial_buf, p_buffer + buffer_size - 4, 4);
378 		bytes_parsed = 0;
379 
380 	}
381 	return 1;
382 }
383 
384 
385 u8 cx231xx_find_boundary_SAV_EAV(u8 *p_buffer, u8 *partial_buf,
386 				 u32 *p_bytes_used)
387 {
388 	u32 bytes_used;
389 	u8 boundary_bytes[8];
390 	u8 sav_eav = 0;
391 
392 	*p_bytes_used = 0;
393 
394 	/* Create an array of the last 4 bytes of the last buffer and the first
395 	   4 bytes of the current buffer. */
396 
397 	memcpy(boundary_bytes, partial_buf, 4);
398 	memcpy(boundary_bytes + 4, p_buffer, 4);
399 
400 	/* Check for the SAV/EAV in the boundary buffer */
401 	sav_eav = cx231xx_find_next_SAV_EAV((u8 *)&boundary_bytes, 8,
402 					    &bytes_used);
403 
404 	if (sav_eav) {
405 		/* found a boundary SAV/EAV.  Updates the bytes used to reflect
406 		   only those used in the new buffer */
407 		*p_bytes_used = bytes_used - 4;
408 	}
409 
410 	return sav_eav;
411 }
412 
413 u8 cx231xx_find_next_SAV_EAV(u8 *p_buffer, u32 buffer_size, u32 *p_bytes_used)
414 {
415 	u32 i;
416 	u8 sav_eav = 0;
417 
418 	/*
419 	 * Don't search if the buffer size is less than 4.  It causes a page
420 	 * fault since buffer_size - 4 evaluates to a large number in that
421 	 * case.
422 	 */
423 	if (buffer_size < 4) {
424 		*p_bytes_used = buffer_size;
425 		return 0;
426 	}
427 
428 	for (i = 0; i < (buffer_size - 3); i++) {
429 
430 		if ((p_buffer[i] == 0xFF) &&
431 		    (p_buffer[i + 1] == 0x00) && (p_buffer[i + 2] == 0x00)) {
432 
433 			*p_bytes_used = i + 4;
434 			sav_eav = p_buffer[i + 3];
435 			return sav_eav;
436 		}
437 	}
438 
439 	*p_bytes_used = buffer_size;
440 	return 0;
441 }
442 
443 u32 cx231xx_get_video_line(struct cx231xx *dev,
444 			   struct cx231xx_dmaqueue *dma_q, u8 sav_eav,
445 			   u8 *p_buffer, u32 buffer_size)
446 {
447 	u32 bytes_copied = 0;
448 	int current_field = -1;
449 
450 	switch (sav_eav) {
451 	case SAV_ACTIVE_VIDEO_FIELD1:
452 		/* looking for skipped line which occurred in PAL 720x480 mode.
453 		   In this case, there will be no active data contained
454 		   between the SAV and EAV */
455 		if ((buffer_size > 3) && (p_buffer[0] == 0xFF) &&
456 		    (p_buffer[1] == 0x00) && (p_buffer[2] == 0x00) &&
457 		    ((p_buffer[3] == EAV_ACTIVE_VIDEO_FIELD1) ||
458 		     (p_buffer[3] == EAV_ACTIVE_VIDEO_FIELD2) ||
459 		     (p_buffer[3] == EAV_VBLANK_FIELD1) ||
460 		     (p_buffer[3] == EAV_VBLANK_FIELD2)))
461 			return bytes_copied;
462 		current_field = 1;
463 		break;
464 
465 	case SAV_ACTIVE_VIDEO_FIELD2:
466 		/* looking for skipped line which occurred in PAL 720x480 mode.
467 		   In this case, there will be no active data contained between
468 		   the SAV and EAV */
469 		if ((buffer_size > 3) && (p_buffer[0] == 0xFF) &&
470 		    (p_buffer[1] == 0x00) && (p_buffer[2] == 0x00) &&
471 		    ((p_buffer[3] == EAV_ACTIVE_VIDEO_FIELD1) ||
472 		     (p_buffer[3] == EAV_ACTIVE_VIDEO_FIELD2) ||
473 		     (p_buffer[3] == EAV_VBLANK_FIELD1)       ||
474 		     (p_buffer[3] == EAV_VBLANK_FIELD2)))
475 			return bytes_copied;
476 		current_field = 2;
477 		break;
478 	}
479 
480 	dma_q->last_sav = sav_eav;
481 
482 	bytes_copied = cx231xx_copy_video_line(dev, dma_q, p_buffer,
483 					       buffer_size, current_field);
484 
485 	return bytes_copied;
486 }
487 
488 u32 cx231xx_copy_video_line(struct cx231xx *dev,
489 			    struct cx231xx_dmaqueue *dma_q, u8 *p_line,
490 			    u32 length, int field_number)
491 {
492 	u32 bytes_to_copy;
493 	struct cx231xx_buffer *buf;
494 	u32 _line_size = dev->width * 2;
495 
496 	if (dma_q->current_field != field_number)
497 		cx231xx_reset_video_buffer(dev, dma_q);
498 
499 	/* get the buffer pointer */
500 	if (dev->USE_ISO)
501 		buf = dev->video_mode.isoc_ctl.buf;
502 	else
503 		buf = dev->video_mode.bulk_ctl.buf;
504 
505 	/* Remember the field number for next time */
506 	dma_q->current_field = field_number;
507 
508 	bytes_to_copy = dma_q->bytes_left_in_line;
509 	if (bytes_to_copy > length)
510 		bytes_to_copy = length;
511 
512 	if (dma_q->lines_completed >= dma_q->lines_per_field) {
513 		dma_q->bytes_left_in_line -= bytes_to_copy;
514 		dma_q->is_partial_line = (dma_q->bytes_left_in_line == 0) ?
515 					  0 : 1;
516 		return 0;
517 	}
518 
519 	dma_q->is_partial_line = 1;
520 
521 	/* If we don't have a buffer, just return the number of bytes we would
522 	   have copied if we had a buffer. */
523 	if (!buf) {
524 		dma_q->bytes_left_in_line -= bytes_to_copy;
525 		dma_q->is_partial_line = (dma_q->bytes_left_in_line == 0)
526 					 ? 0 : 1;
527 		return bytes_to_copy;
528 	}
529 
530 	/* copy the data to video buffer */
531 	cx231xx_do_copy(dev, dma_q, p_line, bytes_to_copy);
532 
533 	dma_q->pos += bytes_to_copy;
534 	dma_q->bytes_left_in_line -= bytes_to_copy;
535 
536 	if (dma_q->bytes_left_in_line == 0) {
537 		dma_q->bytes_left_in_line = _line_size;
538 		dma_q->lines_completed++;
539 		dma_q->is_partial_line = 0;
540 
541 		if (cx231xx_is_buffer_done(dev, dma_q) && buf) {
542 			buffer_filled(dev, dma_q, buf);
543 
544 			dma_q->pos = 0;
545 			buf = NULL;
546 			dma_q->lines_completed = 0;
547 		}
548 	}
549 
550 	return bytes_to_copy;
551 }
552 
553 void cx231xx_reset_video_buffer(struct cx231xx *dev,
554 				struct cx231xx_dmaqueue *dma_q)
555 {
556 	struct cx231xx_buffer *buf;
557 
558 	/* handle the switch from field 1 to field 2 */
559 	if (dma_q->current_field == 1) {
560 		if (dma_q->lines_completed >= dma_q->lines_per_field)
561 			dma_q->field1_done = 1;
562 		else
563 			dma_q->field1_done = 0;
564 	}
565 
566 	if (dev->USE_ISO)
567 		buf = dev->video_mode.isoc_ctl.buf;
568 	else
569 		buf = dev->video_mode.bulk_ctl.buf;
570 
571 	if (buf == NULL) {
572 		/* first try to get the buffer */
573 		get_next_buf(dma_q, &buf);
574 
575 		dma_q->pos = 0;
576 		dma_q->field1_done = 0;
577 		dma_q->current_field = -1;
578 	}
579 
580 	/* reset the counters */
581 	dma_q->bytes_left_in_line = dev->width << 1;
582 	dma_q->lines_completed = 0;
583 }
584 
585 int cx231xx_do_copy(struct cx231xx *dev, struct cx231xx_dmaqueue *dma_q,
586 		    u8 *p_buffer, u32 bytes_to_copy)
587 {
588 	u8 *p_out_buffer = NULL;
589 	u32 current_line_bytes_copied = 0;
590 	struct cx231xx_buffer *buf;
591 	u32 _line_size = dev->width << 1;
592 	void *startwrite;
593 	int offset, lencopy;
594 
595 	if (dev->USE_ISO)
596 		buf = dev->video_mode.isoc_ctl.buf;
597 	else
598 		buf = dev->video_mode.bulk_ctl.buf;
599 
600 	if (buf == NULL)
601 		return -1;
602 
603 	p_out_buffer = videobuf_to_vmalloc(&buf->vb);
604 
605 	current_line_bytes_copied = _line_size - dma_q->bytes_left_in_line;
606 
607 	/* Offset field 2 one line from the top of the buffer */
608 	offset = (dma_q->current_field == 1) ? 0 : _line_size;
609 
610 	/* Offset for field 2 */
611 	startwrite = p_out_buffer + offset;
612 
613 	/* lines already completed in the current field */
614 	startwrite += (dma_q->lines_completed * _line_size * 2);
615 
616 	/* bytes already completed in the current line */
617 	startwrite += current_line_bytes_copied;
618 
619 	lencopy = dma_q->bytes_left_in_line > bytes_to_copy ?
620 		  bytes_to_copy : dma_q->bytes_left_in_line;
621 
622 	if ((u8 *)(startwrite + lencopy) > (u8 *)(p_out_buffer + buf->vb.size))
623 		return 0;
624 
625 	/* The below copies the UYVY data straight into video buffer */
626 	cx231xx_swab((u16 *) p_buffer, (u16 *) startwrite, (u16) lencopy);
627 
628 	return 0;
629 }
630 
631 void cx231xx_swab(u16 *from, u16 *to, u16 len)
632 {
633 	u16 i;
634 
635 	if (len <= 0)
636 		return;
637 
638 	for (i = 0; i < len / 2; i++)
639 		to[i] = (from[i] << 8) | (from[i] >> 8);
640 }
641 
642 u8 cx231xx_is_buffer_done(struct cx231xx *dev, struct cx231xx_dmaqueue *dma_q)
643 {
644 	u8 buffer_complete = 0;
645 
646 	/* Dual field stream */
647 	buffer_complete = ((dma_q->current_field == 2) &&
648 			   (dma_q->lines_completed >= dma_q->lines_per_field) &&
649 			    dma_q->field1_done);
650 
651 	return buffer_complete;
652 }
653 
654 /* ------------------------------------------------------------------
655 	Videobuf operations
656    ------------------------------------------------------------------*/
657 
658 static int
659 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
660 {
661 	struct cx231xx_fh *fh = vq->priv_data;
662 	struct cx231xx *dev = fh->dev;
663 
664 	*size = (fh->dev->width * fh->dev->height * dev->format->depth + 7)>>3;
665 	if (0 == *count)
666 		*count = CX231XX_DEF_BUF;
667 
668 	if (*count < CX231XX_MIN_BUF)
669 		*count = CX231XX_MIN_BUF;
670 
671 	return 0;
672 }
673 
674 /* This is called *without* dev->slock held; please keep it that way */
675 static void free_buffer(struct videobuf_queue *vq, struct cx231xx_buffer *buf)
676 {
677 	struct cx231xx_fh *fh = vq->priv_data;
678 	struct cx231xx *dev = fh->dev;
679 	unsigned long flags = 0;
680 
681 	if (in_interrupt())
682 		BUG();
683 
684 	/* We used to wait for the buffer to finish here, but this didn't work
685 	   because, as we were keeping the state as VIDEOBUF_QUEUED,
686 	   videobuf_queue_cancel marked it as finished for us.
687 	   (Also, it could wedge forever if the hardware was misconfigured.)
688 
689 	   This should be safe; by the time we get here, the buffer isn't
690 	   queued anymore. If we ever start marking the buffers as
691 	   VIDEOBUF_ACTIVE, it won't be, though.
692 	 */
693 	spin_lock_irqsave(&dev->video_mode.slock, flags);
694 	if (dev->USE_ISO) {
695 		if (dev->video_mode.isoc_ctl.buf == buf)
696 			dev->video_mode.isoc_ctl.buf = NULL;
697 	} else {
698 		if (dev->video_mode.bulk_ctl.buf == buf)
699 			dev->video_mode.bulk_ctl.buf = NULL;
700 	}
701 	spin_unlock_irqrestore(&dev->video_mode.slock, flags);
702 
703 	videobuf_vmalloc_free(&buf->vb);
704 	buf->vb.state = VIDEOBUF_NEEDS_INIT;
705 }
706 
707 static int
708 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
709 	       enum v4l2_field field)
710 {
711 	struct cx231xx_fh *fh = vq->priv_data;
712 	struct cx231xx_buffer *buf =
713 	    container_of(vb, struct cx231xx_buffer, vb);
714 	struct cx231xx *dev = fh->dev;
715 	int rc = 0, urb_init = 0;
716 
717 	/* The only currently supported format is 16 bits/pixel */
718 	buf->vb.size = (fh->dev->width * fh->dev->height * dev->format->depth
719 			+ 7) >> 3;
720 	if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
721 		return -EINVAL;
722 
723 	buf->vb.width = dev->width;
724 	buf->vb.height = dev->height;
725 	buf->vb.field = field;
726 
727 	if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
728 		rc = videobuf_iolock(vq, &buf->vb, NULL);
729 		if (rc < 0)
730 			goto fail;
731 	}
732 
733 	if (dev->USE_ISO) {
734 		if (!dev->video_mode.isoc_ctl.num_bufs)
735 			urb_init = 1;
736 	} else {
737 		if (!dev->video_mode.bulk_ctl.num_bufs)
738 			urb_init = 1;
739 	}
740 	/*cx231xx_info("urb_init=%d dev->video_mode.max_pkt_size=%d\n",
741 		urb_init, dev->video_mode.max_pkt_size);*/
742 	if (urb_init) {
743 		dev->mode_tv = 0;
744 		if (dev->USE_ISO)
745 			rc = cx231xx_init_isoc(dev, CX231XX_NUM_PACKETS,
746 				       CX231XX_NUM_BUFS,
747 				       dev->video_mode.max_pkt_size,
748 				       cx231xx_isoc_copy);
749 		else
750 			rc = cx231xx_init_bulk(dev, CX231XX_NUM_PACKETS,
751 				       CX231XX_NUM_BUFS,
752 				       dev->video_mode.max_pkt_size,
753 				       cx231xx_bulk_copy);
754 		if (rc < 0)
755 			goto fail;
756 	}
757 
758 	buf->vb.state = VIDEOBUF_PREPARED;
759 	return 0;
760 
761 fail:
762 	free_buffer(vq, buf);
763 	return rc;
764 }
765 
766 static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
767 {
768 	struct cx231xx_buffer *buf =
769 	    container_of(vb, struct cx231xx_buffer, vb);
770 	struct cx231xx_fh *fh = vq->priv_data;
771 	struct cx231xx *dev = fh->dev;
772 	struct cx231xx_dmaqueue *vidq = &dev->video_mode.vidq;
773 
774 	buf->vb.state = VIDEOBUF_QUEUED;
775 	list_add_tail(&buf->vb.queue, &vidq->active);
776 
777 }
778 
779 static void buffer_release(struct videobuf_queue *vq,
780 			   struct videobuf_buffer *vb)
781 {
782 	struct cx231xx_buffer *buf =
783 	    container_of(vb, struct cx231xx_buffer, vb);
784 	struct cx231xx_fh *fh = vq->priv_data;
785 	struct cx231xx *dev = (struct cx231xx *)fh->dev;
786 
787 	cx231xx_isocdbg("cx231xx: called buffer_release\n");
788 
789 	free_buffer(vq, buf);
790 }
791 
792 static struct videobuf_queue_ops cx231xx_video_qops = {
793 	.buf_setup = buffer_setup,
794 	.buf_prepare = buffer_prepare,
795 	.buf_queue = buffer_queue,
796 	.buf_release = buffer_release,
797 };
798 
799 /*********************  v4l2 interface  **************************************/
800 
801 void video_mux(struct cx231xx *dev, int index)
802 {
803 	dev->video_input = index;
804 	dev->ctl_ainput = INPUT(index)->amux;
805 
806 	cx231xx_set_video_input_mux(dev, index);
807 
808 	cx25840_call(dev, video, s_routing, INPUT(index)->vmux, 0, 0);
809 
810 	cx231xx_set_audio_input(dev, dev->ctl_ainput);
811 
812 	cx231xx_info("video_mux : %d\n", index);
813 
814 	/* do mode control overrides if required */
815 	cx231xx_do_mode_ctrl_overrides(dev);
816 }
817 
818 /* Usage lock check functions */
819 static int res_get(struct cx231xx_fh *fh)
820 {
821 	struct cx231xx *dev = fh->dev;
822 	int rc = 0;
823 
824 	/* This instance already has stream_on */
825 	if (fh->stream_on)
826 		return rc;
827 
828 	if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
829 		if (dev->stream_on)
830 			return -EBUSY;
831 		dev->stream_on = 1;
832 	} else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
833 		if (dev->vbi_stream_on)
834 			return -EBUSY;
835 		dev->vbi_stream_on = 1;
836 	} else
837 		return -EINVAL;
838 
839 	fh->stream_on = 1;
840 
841 	return rc;
842 }
843 
844 static int res_check(struct cx231xx_fh *fh)
845 {
846 	return fh->stream_on;
847 }
848 
849 static void res_free(struct cx231xx_fh *fh)
850 {
851 	struct cx231xx *dev = fh->dev;
852 
853 	fh->stream_on = 0;
854 
855 	if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
856 		dev->stream_on = 0;
857 	if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE)
858 		dev->vbi_stream_on = 0;
859 }
860 
861 static int check_dev(struct cx231xx *dev)
862 {
863 	if (dev->state & DEV_DISCONNECTED) {
864 		cx231xx_errdev("v4l2 ioctl: device not present\n");
865 		return -ENODEV;
866 	}
867 	return 0;
868 }
869 
870 /* ------------------------------------------------------------------
871 	IOCTL vidioc handling
872    ------------------------------------------------------------------*/
873 
874 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
875 				struct v4l2_format *f)
876 {
877 	struct cx231xx_fh *fh = priv;
878 	struct cx231xx *dev = fh->dev;
879 
880 	f->fmt.pix.width = dev->width;
881 	f->fmt.pix.height = dev->height;
882 	f->fmt.pix.pixelformat = dev->format->fourcc;
883 	f->fmt.pix.bytesperline = (dev->width * dev->format->depth + 7) >> 3;
884 	f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * dev->height;
885 	f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
886 
887 	f->fmt.pix.field = V4L2_FIELD_INTERLACED;
888 
889 	return 0;
890 }
891 
892 static struct cx231xx_fmt *format_by_fourcc(unsigned int fourcc)
893 {
894 	unsigned int i;
895 
896 	for (i = 0; i < ARRAY_SIZE(format); i++)
897 		if (format[i].fourcc == fourcc)
898 			return &format[i];
899 
900 	return NULL;
901 }
902 
903 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
904 				  struct v4l2_format *f)
905 {
906 	struct cx231xx_fh *fh = priv;
907 	struct cx231xx *dev = fh->dev;
908 	unsigned int width = f->fmt.pix.width;
909 	unsigned int height = f->fmt.pix.height;
910 	unsigned int maxw = norm_maxw(dev);
911 	unsigned int maxh = norm_maxh(dev);
912 	struct cx231xx_fmt *fmt;
913 
914 	fmt = format_by_fourcc(f->fmt.pix.pixelformat);
915 	if (!fmt) {
916 		cx231xx_videodbg("Fourcc format (%08x) invalid.\n",
917 				 f->fmt.pix.pixelformat);
918 		return -EINVAL;
919 	}
920 
921 	/* width must even because of the YUYV format
922 	   height must be even because of interlacing */
923 	v4l_bound_align_image(&width, 48, maxw, 1, &height, 32, maxh, 1, 0);
924 
925 	f->fmt.pix.width = width;
926 	f->fmt.pix.height = height;
927 	f->fmt.pix.pixelformat = fmt->fourcc;
928 	f->fmt.pix.bytesperline = (width * fmt->depth + 7) >> 3;
929 	f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * height;
930 	f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
931 	f->fmt.pix.field = V4L2_FIELD_INTERLACED;
932 
933 	return 0;
934 }
935 
936 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
937 				struct v4l2_format *f)
938 {
939 	struct cx231xx_fh *fh = priv;
940 	struct cx231xx *dev = fh->dev;
941 	int rc;
942 	struct cx231xx_fmt *fmt;
943 	struct v4l2_mbus_framefmt mbus_fmt;
944 
945 	rc = check_dev(dev);
946 	if (rc < 0)
947 		return rc;
948 
949 	vidioc_try_fmt_vid_cap(file, priv, f);
950 
951 	fmt = format_by_fourcc(f->fmt.pix.pixelformat);
952 	if (!fmt)
953 		return -EINVAL;
954 
955 	if (videobuf_queue_is_busy(&fh->vb_vidq)) {
956 		cx231xx_errdev("%s queue busy\n", __func__);
957 		return -EBUSY;
958 	}
959 
960 	if (dev->stream_on && !fh->stream_on) {
961 		cx231xx_errdev("%s device in use by another fh\n", __func__);
962 		return -EBUSY;
963 	}
964 
965 	/* set new image size */
966 	dev->width = f->fmt.pix.width;
967 	dev->height = f->fmt.pix.height;
968 	dev->format = fmt;
969 
970 	v4l2_fill_mbus_format(&mbus_fmt, &f->fmt.pix, V4L2_MBUS_FMT_FIXED);
971 	call_all(dev, video, s_mbus_fmt, &mbus_fmt);
972 	v4l2_fill_pix_format(&f->fmt.pix, &mbus_fmt);
973 
974 	return rc;
975 }
976 
977 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *id)
978 {
979 	struct cx231xx_fh *fh = priv;
980 	struct cx231xx *dev = fh->dev;
981 
982 	*id = dev->norm;
983 	return 0;
984 }
985 
986 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm)
987 {
988 	struct cx231xx_fh *fh = priv;
989 	struct cx231xx *dev = fh->dev;
990 	struct v4l2_mbus_framefmt mbus_fmt;
991 	int rc;
992 
993 	rc = check_dev(dev);
994 	if (rc < 0)
995 		return rc;
996 
997 	if (dev->norm == norm)
998 		return 0;
999 
1000 	if (videobuf_queue_is_busy(&fh->vb_vidq))
1001 		return -EBUSY;
1002 
1003 	dev->norm = norm;
1004 
1005 	/* Adjusts width/height, if needed */
1006 	dev->width = 720;
1007 	dev->height = (dev->norm & V4L2_STD_625_50) ? 576 : 480;
1008 
1009 	call_all(dev, video, s_std, dev->norm);
1010 
1011 	/* We need to reset basic properties in the decoder related to
1012 	   resolution (since a standard change effects things like the number
1013 	   of lines in VACT, etc) */
1014 	memset(&mbus_fmt, 0, sizeof(mbus_fmt));
1015 	mbus_fmt.code = V4L2_MBUS_FMT_FIXED;
1016 	mbus_fmt.width = dev->width;
1017 	mbus_fmt.height = dev->height;
1018 	call_all(dev, video, s_mbus_fmt, &mbus_fmt);
1019 
1020 	/* do mode control overrides */
1021 	cx231xx_do_mode_ctrl_overrides(dev);
1022 
1023 	return 0;
1024 }
1025 
1026 static const char *iname[] = {
1027 	[CX231XX_VMUX_COMPOSITE1] = "Composite1",
1028 	[CX231XX_VMUX_SVIDEO]     = "S-Video",
1029 	[CX231XX_VMUX_TELEVISION] = "Television",
1030 	[CX231XX_VMUX_CABLE]      = "Cable TV",
1031 	[CX231XX_VMUX_DVB]        = "DVB",
1032 	[CX231XX_VMUX_DEBUG]      = "for debug only",
1033 };
1034 
1035 int cx231xx_enum_input(struct file *file, void *priv,
1036 			     struct v4l2_input *i)
1037 {
1038 	struct cx231xx_fh *fh = priv;
1039 	struct cx231xx *dev = fh->dev;
1040 	u32 gen_stat;
1041 	unsigned int ret, n;
1042 
1043 	n = i->index;
1044 	if (n >= MAX_CX231XX_INPUT)
1045 		return -EINVAL;
1046 	if (0 == INPUT(n)->type)
1047 		return -EINVAL;
1048 
1049 	i->index = n;
1050 	i->type = V4L2_INPUT_TYPE_CAMERA;
1051 
1052 	strcpy(i->name, iname[INPUT(n)->type]);
1053 
1054 	if ((CX231XX_VMUX_TELEVISION == INPUT(n)->type) ||
1055 	    (CX231XX_VMUX_CABLE == INPUT(n)->type))
1056 		i->type = V4L2_INPUT_TYPE_TUNER;
1057 
1058 	i->std = dev->vdev->tvnorms;
1059 
1060 	/* If they are asking about the active input, read signal status */
1061 	if (n == dev->video_input) {
1062 		ret = cx231xx_read_i2c_data(dev, VID_BLK_I2C_ADDRESS,
1063 					    GEN_STAT, 2, &gen_stat, 4);
1064 		if (ret > 0) {
1065 			if ((gen_stat & FLD_VPRES) == 0x00)
1066 				i->status |= V4L2_IN_ST_NO_SIGNAL;
1067 			if ((gen_stat & FLD_HLOCK) == 0x00)
1068 				i->status |= V4L2_IN_ST_NO_H_LOCK;
1069 		}
1070 	}
1071 
1072 	return 0;
1073 }
1074 
1075 int cx231xx_g_input(struct file *file, void *priv, unsigned int *i)
1076 {
1077 	struct cx231xx_fh *fh = priv;
1078 	struct cx231xx *dev = fh->dev;
1079 
1080 	*i = dev->video_input;
1081 
1082 	return 0;
1083 }
1084 
1085 int cx231xx_s_input(struct file *file, void *priv, unsigned int i)
1086 {
1087 	struct cx231xx_fh *fh = priv;
1088 	struct cx231xx *dev = fh->dev;
1089 	int rc;
1090 
1091 	dev->mode_tv = 0;
1092 	rc = check_dev(dev);
1093 	if (rc < 0)
1094 		return rc;
1095 
1096 	if (i >= MAX_CX231XX_INPUT)
1097 		return -EINVAL;
1098 	if (0 == INPUT(i)->type)
1099 		return -EINVAL;
1100 
1101 	video_mux(dev, i);
1102 
1103 	if (INPUT(i)->type == CX231XX_VMUX_TELEVISION ||
1104 	    INPUT(i)->type == CX231XX_VMUX_CABLE) {
1105 		/* There's a tuner, so reset the standard and put it on the
1106 		   last known frequency (since it was probably powered down
1107 		   until now */
1108 		call_all(dev, video, s_std, dev->norm);
1109 	}
1110 
1111 	return 0;
1112 }
1113 
1114 int cx231xx_g_tuner(struct file *file, void *priv, struct v4l2_tuner *t)
1115 {
1116 	struct cx231xx_fh *fh = priv;
1117 	struct cx231xx *dev = fh->dev;
1118 	int rc;
1119 
1120 	rc = check_dev(dev);
1121 	if (rc < 0)
1122 		return rc;
1123 
1124 	if (0 != t->index)
1125 		return -EINVAL;
1126 
1127 	strcpy(t->name, "Tuner");
1128 
1129 	t->type = V4L2_TUNER_ANALOG_TV;
1130 	t->capability = V4L2_TUNER_CAP_NORM;
1131 	t->rangehigh = 0xffffffffUL;
1132 	t->signal = 0xffff;	/* LOCKED */
1133 	call_all(dev, tuner, g_tuner, t);
1134 
1135 	return 0;
1136 }
1137 
1138 int cx231xx_s_tuner(struct file *file, void *priv, const struct v4l2_tuner *t)
1139 {
1140 	struct cx231xx_fh *fh = priv;
1141 	struct cx231xx *dev = fh->dev;
1142 	int rc;
1143 
1144 	rc = check_dev(dev);
1145 	if (rc < 0)
1146 		return rc;
1147 
1148 	if (0 != t->index)
1149 		return -EINVAL;
1150 #if 0
1151 	call_all(dev, tuner, s_tuner, t);
1152 #endif
1153 	return 0;
1154 }
1155 
1156 int cx231xx_g_frequency(struct file *file, void *priv,
1157 			      struct v4l2_frequency *f)
1158 {
1159 	struct cx231xx_fh *fh = priv;
1160 	struct cx231xx *dev = fh->dev;
1161 
1162 	if (f->tuner)
1163 		return -EINVAL;
1164 
1165 	f->frequency = dev->ctl_freq;
1166 
1167 	return 0;
1168 }
1169 
1170 int cx231xx_s_frequency(struct file *file, void *priv,
1171 			      const struct v4l2_frequency *f)
1172 {
1173 	struct cx231xx_fh *fh = priv;
1174 	struct cx231xx *dev = fh->dev;
1175 	struct v4l2_frequency new_freq = *f;
1176 	int rc;
1177 	u32 if_frequency = 5400000;
1178 
1179 	cx231xx_info("Enter vidioc_s_frequency()f->frequency=%d;f->type=%d\n",
1180 		 f->frequency, f->type);
1181 	/*cx231xx_info("f->type:  1-radio 2-analogTV 3-digitalTV\n");*/
1182 
1183 	rc = check_dev(dev);
1184 	if (rc < 0)
1185 		return rc;
1186 
1187 	if (0 != f->tuner)
1188 		return -EINVAL;
1189 
1190 	/* set pre channel change settings in DIF first */
1191 	rc = cx231xx_tuner_pre_channel_change(dev);
1192 
1193 	call_all(dev, tuner, s_frequency, f);
1194 	call_all(dev, tuner, g_frequency, &new_freq);
1195 	dev->ctl_freq = new_freq.frequency;
1196 
1197 	/* set post channel change settings in DIF first */
1198 	rc = cx231xx_tuner_post_channel_change(dev);
1199 
1200 	if (dev->tuner_type == TUNER_NXP_TDA18271) {
1201 		if (dev->norm & (V4L2_STD_MN | V4L2_STD_NTSC_443))
1202 			if_frequency = 5400000;  /*5.4MHz	*/
1203 		else if (dev->norm & V4L2_STD_B)
1204 			if_frequency = 6000000;  /*6.0MHz	*/
1205 		else if (dev->norm & (V4L2_STD_PAL_DK | V4L2_STD_SECAM_DK))
1206 			if_frequency = 6900000;  /*6.9MHz	*/
1207 		else if (dev->norm & V4L2_STD_GH)
1208 			if_frequency = 7100000;  /*7.1MHz	*/
1209 		else if (dev->norm & V4L2_STD_PAL_I)
1210 			if_frequency = 7250000;  /*7.25MHz	*/
1211 		else if (dev->norm & V4L2_STD_SECAM_L)
1212 			if_frequency = 6900000;  /*6.9MHz	*/
1213 		else if (dev->norm & V4L2_STD_SECAM_LC)
1214 			if_frequency = 1250000;  /*1.25MHz	*/
1215 
1216 		cx231xx_info("if_frequency is set to %d\n", if_frequency);
1217 		cx231xx_set_Colibri_For_LowIF(dev, if_frequency, 1, 1);
1218 
1219 		update_HH_register_after_set_DIF(dev);
1220 	}
1221 
1222 	cx231xx_info("Set New FREQUENCY to %d\n", f->frequency);
1223 
1224 	return rc;
1225 }
1226 
1227 #ifdef CONFIG_VIDEO_ADV_DEBUG
1228 
1229 int cx231xx_g_chip_info(struct file *file, void *fh,
1230 			struct v4l2_dbg_chip_info *chip)
1231 {
1232 	switch (chip->match.addr) {
1233 	case 0:	/* Cx231xx - internal registers */
1234 		return 0;
1235 	case 1:	/* AFE - read byte */
1236 		strlcpy(chip->name, "AFE (byte)", sizeof(chip->name));
1237 		return 0;
1238 	case 2:	/* Video Block - read byte */
1239 		strlcpy(chip->name, "Video (byte)", sizeof(chip->name));
1240 		return 0;
1241 	case 3:	/* I2S block - read byte */
1242 		strlcpy(chip->name, "I2S (byte)", sizeof(chip->name));
1243 		return 0;
1244 	case 4: /* AFE - read dword */
1245 		strlcpy(chip->name, "AFE (dword)", sizeof(chip->name));
1246 		return 0;
1247 	case 5: /* Video Block - read dword */
1248 		strlcpy(chip->name, "Video (dword)", sizeof(chip->name));
1249 		return 0;
1250 	case 6: /* I2S Block - read dword */
1251 		strlcpy(chip->name, "I2S (dword)", sizeof(chip->name));
1252 		return 0;
1253 	}
1254 	return -EINVAL;
1255 }
1256 
1257 int cx231xx_g_register(struct file *file, void *priv,
1258 			     struct v4l2_dbg_register *reg)
1259 {
1260 	struct cx231xx_fh *fh = priv;
1261 	struct cx231xx *dev = fh->dev;
1262 	int ret;
1263 	u8 value[4] = { 0, 0, 0, 0 };
1264 	u32 data = 0;
1265 
1266 	switch (reg->match.addr) {
1267 	case 0:	/* Cx231xx - internal registers */
1268 		ret = cx231xx_read_ctrl_reg(dev, VRT_GET_REGISTER,
1269 				(u16)reg->reg, value, 4);
1270 		reg->val = value[0] | value[1] << 8 |
1271 			value[2] << 16 | value[3] << 24;
1272 		reg->size = 4;
1273 		break;
1274 	case 1:	/* AFE - read byte */
1275 		ret = cx231xx_read_i2c_data(dev, AFE_DEVICE_ADDRESS,
1276 				(u16)reg->reg, 2, &data, 1);
1277 		reg->val = data;
1278 		reg->size = 1;
1279 		break;
1280 	case 2:	/* Video Block - read byte */
1281 		ret = cx231xx_read_i2c_data(dev, VID_BLK_I2C_ADDRESS,
1282 				(u16)reg->reg, 2, &data, 1);
1283 		reg->val = data;
1284 		reg->size = 1;
1285 		break;
1286 	case 3:	/* I2S block - read byte */
1287 		ret = cx231xx_read_i2c_data(dev, I2S_BLK_DEVICE_ADDRESS,
1288 				(u16)reg->reg, 1, &data, 1);
1289 		reg->val = data;
1290 		reg->size = 1;
1291 		break;
1292 	case 4: /* AFE - read dword */
1293 		ret = cx231xx_read_i2c_data(dev, AFE_DEVICE_ADDRESS,
1294 				(u16)reg->reg, 2, &data, 4);
1295 		reg->val = data;
1296 		reg->size = 4;
1297 		break;
1298 	case 5: /* Video Block - read dword */
1299 		ret = cx231xx_read_i2c_data(dev, VID_BLK_I2C_ADDRESS,
1300 				(u16)reg->reg, 2, &data, 4);
1301 		reg->val = data;
1302 		reg->size = 4;
1303 		break;
1304 	case 6: /* I2S Block - read dword */
1305 		ret = cx231xx_read_i2c_data(dev, I2S_BLK_DEVICE_ADDRESS,
1306 				(u16)reg->reg, 1, &data, 4);
1307 		reg->val = data;
1308 		reg->size = 4;
1309 		break;
1310 	default:
1311 		return -EINVAL;
1312 	}
1313 	return ret < 0 ? ret : 0;
1314 }
1315 
1316 int cx231xx_s_register(struct file *file, void *priv,
1317 			     const struct v4l2_dbg_register *reg)
1318 {
1319 	struct cx231xx_fh *fh = priv;
1320 	struct cx231xx *dev = fh->dev;
1321 	int ret;
1322 	u8 data[4] = { 0, 0, 0, 0 };
1323 
1324 	switch (reg->match.addr) {
1325 	case 0:	/* cx231xx internal registers */
1326 		data[0] = (u8) reg->val;
1327 		data[1] = (u8) (reg->val >> 8);
1328 		data[2] = (u8) (reg->val >> 16);
1329 		data[3] = (u8) (reg->val >> 24);
1330 		ret = cx231xx_write_ctrl_reg(dev, VRT_SET_REGISTER,
1331 				(u16)reg->reg, data, 4);
1332 		break;
1333 	case 1:	/* AFE - write byte */
1334 		ret = cx231xx_write_i2c_data(dev, AFE_DEVICE_ADDRESS,
1335 				(u16)reg->reg, 2, reg->val, 1);
1336 		break;
1337 	case 2:	/* Video Block - write byte */
1338 		ret = cx231xx_write_i2c_data(dev, VID_BLK_I2C_ADDRESS,
1339 				(u16)reg->reg, 2, reg->val, 1);
1340 		break;
1341 	case 3:	/* I2S block - write byte */
1342 		ret = cx231xx_write_i2c_data(dev, I2S_BLK_DEVICE_ADDRESS,
1343 				(u16)reg->reg, 1, reg->val, 1);
1344 		break;
1345 	case 4: /* AFE - write dword */
1346 		ret = cx231xx_write_i2c_data(dev, AFE_DEVICE_ADDRESS,
1347 				(u16)reg->reg, 2, reg->val, 4);
1348 		break;
1349 	case 5: /* Video Block - write dword */
1350 		ret = cx231xx_write_i2c_data(dev, VID_BLK_I2C_ADDRESS,
1351 				(u16)reg->reg, 2, reg->val, 4);
1352 		break;
1353 	case 6: /* I2S block - write dword */
1354 		ret = cx231xx_write_i2c_data(dev, I2S_BLK_DEVICE_ADDRESS,
1355 				(u16)reg->reg, 1, reg->val, 4);
1356 		break;
1357 	default:
1358 		return -EINVAL;
1359 	}
1360 	return ret < 0 ? ret : 0;
1361 }
1362 #endif
1363 
1364 static int vidioc_cropcap(struct file *file, void *priv,
1365 			  struct v4l2_cropcap *cc)
1366 {
1367 	struct cx231xx_fh *fh = priv;
1368 	struct cx231xx *dev = fh->dev;
1369 
1370 	if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1371 		return -EINVAL;
1372 
1373 	cc->bounds.left = 0;
1374 	cc->bounds.top = 0;
1375 	cc->bounds.width = dev->width;
1376 	cc->bounds.height = dev->height;
1377 	cc->defrect = cc->bounds;
1378 	cc->pixelaspect.numerator = 54;	/* 4:3 FIXME: remove magic numbers */
1379 	cc->pixelaspect.denominator = 59;
1380 
1381 	return 0;
1382 }
1383 
1384 static int vidioc_streamon(struct file *file, void *priv,
1385 			   enum v4l2_buf_type type)
1386 {
1387 	struct cx231xx_fh *fh = priv;
1388 	struct cx231xx *dev = fh->dev;
1389 	int rc;
1390 
1391 	rc = check_dev(dev);
1392 	if (rc < 0)
1393 		return rc;
1394 
1395 	rc = res_get(fh);
1396 
1397 	if (likely(rc >= 0))
1398 		rc = videobuf_streamon(&fh->vb_vidq);
1399 
1400 	call_all(dev, video, s_stream, 1);
1401 
1402 	return rc;
1403 }
1404 
1405 static int vidioc_streamoff(struct file *file, void *priv,
1406 			    enum v4l2_buf_type type)
1407 {
1408 	struct cx231xx_fh *fh = priv;
1409 	struct cx231xx *dev = fh->dev;
1410 	int rc;
1411 
1412 	rc = check_dev(dev);
1413 	if (rc < 0)
1414 		return rc;
1415 
1416 	if (type != fh->type)
1417 		return -EINVAL;
1418 
1419 	cx25840_call(dev, video, s_stream, 0);
1420 
1421 	videobuf_streamoff(&fh->vb_vidq);
1422 	res_free(fh);
1423 
1424 	return 0;
1425 }
1426 
1427 int cx231xx_querycap(struct file *file, void *priv,
1428 			   struct v4l2_capability *cap)
1429 {
1430 	struct video_device *vdev = video_devdata(file);
1431 	struct cx231xx_fh *fh = priv;
1432 	struct cx231xx *dev = fh->dev;
1433 
1434 	strlcpy(cap->driver, "cx231xx", sizeof(cap->driver));
1435 	strlcpy(cap->card, cx231xx_boards[dev->model].name, sizeof(cap->card));
1436 	usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
1437 
1438 	if (vdev->vfl_type == VFL_TYPE_RADIO)
1439 		cap->device_caps = V4L2_CAP_RADIO;
1440 	else {
1441 		cap->device_caps = V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1442 		if (vdev->vfl_type == VFL_TYPE_VBI)
1443 			cap->device_caps |= V4L2_CAP_VBI_CAPTURE;
1444 		else
1445 			cap->device_caps |= V4L2_CAP_VIDEO_CAPTURE;
1446 	}
1447 	if (dev->tuner_type != TUNER_ABSENT)
1448 		cap->device_caps |= V4L2_CAP_TUNER;
1449 	cap->capabilities = cap->device_caps | V4L2_CAP_READWRITE |
1450 		V4L2_CAP_VBI_CAPTURE | V4L2_CAP_VIDEO_CAPTURE |
1451 		V4L2_CAP_STREAMING | V4L2_CAP_DEVICE_CAPS;
1452 	if (dev->radio_dev)
1453 		cap->capabilities |= V4L2_CAP_RADIO;
1454 
1455 	return 0;
1456 }
1457 
1458 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
1459 				   struct v4l2_fmtdesc *f)
1460 {
1461 	if (unlikely(f->index >= ARRAY_SIZE(format)))
1462 		return -EINVAL;
1463 
1464 	strlcpy(f->description, format[f->index].name, sizeof(f->description));
1465 	f->pixelformat = format[f->index].fourcc;
1466 
1467 	return 0;
1468 }
1469 
1470 /* RAW VBI ioctls */
1471 
1472 static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
1473 				struct v4l2_format *f)
1474 {
1475 	struct cx231xx_fh *fh = priv;
1476 	struct cx231xx *dev = fh->dev;
1477 
1478 	f->fmt.vbi.sampling_rate = 6750000 * 4;
1479 	f->fmt.vbi.samples_per_line = VBI_LINE_LENGTH;
1480 	f->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
1481 	f->fmt.vbi.offset = 0;
1482 	f->fmt.vbi.start[0] = (dev->norm & V4L2_STD_625_50) ?
1483 	    PAL_VBI_START_LINE : NTSC_VBI_START_LINE;
1484 	f->fmt.vbi.count[0] = (dev->norm & V4L2_STD_625_50) ?
1485 	    PAL_VBI_LINES : NTSC_VBI_LINES;
1486 	f->fmt.vbi.start[1] = (dev->norm & V4L2_STD_625_50) ?
1487 	    PAL_VBI_START_LINE + 312 : NTSC_VBI_START_LINE + 263;
1488 	f->fmt.vbi.count[1] = f->fmt.vbi.count[0];
1489 	memset(f->fmt.vbi.reserved, 0, sizeof(f->fmt.vbi.reserved));
1490 
1491 	return 0;
1492 
1493 }
1494 
1495 static int vidioc_try_fmt_vbi_cap(struct file *file, void *priv,
1496 				  struct v4l2_format *f)
1497 {
1498 	struct cx231xx_fh *fh = priv;
1499 	struct cx231xx *dev = fh->dev;
1500 
1501 	f->fmt.vbi.sampling_rate = 6750000 * 4;
1502 	f->fmt.vbi.samples_per_line = VBI_LINE_LENGTH;
1503 	f->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
1504 	f->fmt.vbi.offset = 0;
1505 	f->fmt.vbi.flags = 0;
1506 	f->fmt.vbi.start[0] = (dev->norm & V4L2_STD_625_50) ?
1507 	    PAL_VBI_START_LINE : NTSC_VBI_START_LINE;
1508 	f->fmt.vbi.count[0] = (dev->norm & V4L2_STD_625_50) ?
1509 	    PAL_VBI_LINES : NTSC_VBI_LINES;
1510 	f->fmt.vbi.start[1] = (dev->norm & V4L2_STD_625_50) ?
1511 	    PAL_VBI_START_LINE + 312 : NTSC_VBI_START_LINE + 263;
1512 	f->fmt.vbi.count[1] = f->fmt.vbi.count[0];
1513 	memset(f->fmt.vbi.reserved, 0, sizeof(f->fmt.vbi.reserved));
1514 
1515 	return 0;
1516 
1517 }
1518 
1519 static int vidioc_s_fmt_vbi_cap(struct file *file, void *priv,
1520 				  struct v4l2_format *f)
1521 {
1522 	struct cx231xx_fh *fh = priv;
1523 	struct cx231xx *dev = fh->dev;
1524 
1525 	if (dev->vbi_stream_on && !fh->stream_on) {
1526 		cx231xx_errdev("%s device in use by another fh\n", __func__);
1527 		return -EBUSY;
1528 	}
1529 	return vidioc_try_fmt_vbi_cap(file, priv, f);
1530 }
1531 
1532 static int vidioc_reqbufs(struct file *file, void *priv,
1533 			  struct v4l2_requestbuffers *rb)
1534 {
1535 	struct cx231xx_fh *fh = priv;
1536 	struct cx231xx *dev = fh->dev;
1537 	int rc;
1538 
1539 	rc = check_dev(dev);
1540 	if (rc < 0)
1541 		return rc;
1542 
1543 	return videobuf_reqbufs(&fh->vb_vidq, rb);
1544 }
1545 
1546 static int vidioc_querybuf(struct file *file, void *priv, struct v4l2_buffer *b)
1547 {
1548 	struct cx231xx_fh *fh = priv;
1549 	struct cx231xx *dev = fh->dev;
1550 	int rc;
1551 
1552 	rc = check_dev(dev);
1553 	if (rc < 0)
1554 		return rc;
1555 
1556 	return videobuf_querybuf(&fh->vb_vidq, b);
1557 }
1558 
1559 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1560 {
1561 	struct cx231xx_fh *fh = priv;
1562 	struct cx231xx *dev = fh->dev;
1563 	int rc;
1564 
1565 	rc = check_dev(dev);
1566 	if (rc < 0)
1567 		return rc;
1568 
1569 	return videobuf_qbuf(&fh->vb_vidq, b);
1570 }
1571 
1572 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1573 {
1574 	struct cx231xx_fh *fh = priv;
1575 	struct cx231xx *dev = fh->dev;
1576 	int rc;
1577 
1578 	rc = check_dev(dev);
1579 	if (rc < 0)
1580 		return rc;
1581 
1582 	return videobuf_dqbuf(&fh->vb_vidq, b, file->f_flags & O_NONBLOCK);
1583 }
1584 
1585 /* ----------------------------------------------------------- */
1586 /* RADIO ESPECIFIC IOCTLS                                      */
1587 /* ----------------------------------------------------------- */
1588 
1589 static int radio_g_tuner(struct file *file, void *priv, struct v4l2_tuner *t)
1590 {
1591 	struct cx231xx *dev = ((struct cx231xx_fh *)priv)->dev;
1592 
1593 	if (t->index)
1594 		return -EINVAL;
1595 
1596 	strcpy(t->name, "Radio");
1597 
1598 	call_all(dev, tuner, g_tuner, t);
1599 
1600 	return 0;
1601 }
1602 static int radio_s_tuner(struct file *file, void *priv, const struct v4l2_tuner *t)
1603 {
1604 	struct cx231xx *dev = ((struct cx231xx_fh *)priv)->dev;
1605 
1606 	if (t->index)
1607 		return -EINVAL;
1608 
1609 	call_all(dev, tuner, s_tuner, t);
1610 
1611 	return 0;
1612 }
1613 
1614 /*
1615  * cx231xx_v4l2_open()
1616  * inits the device and starts isoc transfer
1617  */
1618 static int cx231xx_v4l2_open(struct file *filp)
1619 {
1620 	int radio = 0;
1621 	struct video_device *vdev = video_devdata(filp);
1622 	struct cx231xx *dev = video_drvdata(filp);
1623 	struct cx231xx_fh *fh;
1624 	enum v4l2_buf_type fh_type = 0;
1625 
1626 	switch (vdev->vfl_type) {
1627 	case VFL_TYPE_GRABBER:
1628 		fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1629 		break;
1630 	case VFL_TYPE_VBI:
1631 		fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
1632 		break;
1633 	case VFL_TYPE_RADIO:
1634 		radio = 1;
1635 		break;
1636 	}
1637 
1638 	cx231xx_videodbg("open dev=%s type=%s users=%d\n",
1639 			 video_device_node_name(vdev), v4l2_type_names[fh_type],
1640 			 dev->users);
1641 
1642 #if 0
1643 	errCode = cx231xx_set_mode(dev, CX231XX_ANALOG_MODE);
1644 	if (errCode < 0) {
1645 		cx231xx_errdev
1646 		    ("Device locked on digital mode. Can't open analog\n");
1647 		return -EBUSY;
1648 	}
1649 #endif
1650 
1651 	fh = kzalloc(sizeof(struct cx231xx_fh), GFP_KERNEL);
1652 	if (!fh) {
1653 		cx231xx_errdev("cx231xx-video.c: Out of memory?!\n");
1654 		return -ENOMEM;
1655 	}
1656 	if (mutex_lock_interruptible(&dev->lock)) {
1657 		kfree(fh);
1658 		return -ERESTARTSYS;
1659 	}
1660 	fh->dev = dev;
1661 	fh->type = fh_type;
1662 	filp->private_data = fh;
1663 	v4l2_fh_init(&fh->fh, vdev);
1664 
1665 	if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
1666 		/* Power up in Analog TV mode */
1667 		if (dev->board.external_av)
1668 			cx231xx_set_power_mode(dev,
1669 				 POLARIS_AVMODE_ENXTERNAL_AV);
1670 		else
1671 			cx231xx_set_power_mode(dev, POLARIS_AVMODE_ANALOGT_TV);
1672 
1673 #if 0
1674 		cx231xx_set_mode(dev, CX231XX_ANALOG_MODE);
1675 #endif
1676 
1677 		/* set video alternate setting */
1678 		cx231xx_set_video_alternate(dev);
1679 
1680 		/* Needed, since GPIO might have disabled power of
1681 		   some i2c device */
1682 		cx231xx_config_i2c(dev);
1683 
1684 		/* device needs to be initialized before isoc transfer */
1685 		dev->video_input = dev->video_input > 2 ? 2 : dev->video_input;
1686 
1687 	}
1688 	if (radio) {
1689 		cx231xx_videodbg("video_open: setting radio device\n");
1690 
1691 		/* cx231xx_start_radio(dev); */
1692 
1693 		call_all(dev, tuner, s_radio);
1694 	}
1695 
1696 	dev->users++;
1697 
1698 	if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1699 		videobuf_queue_vmalloc_init(&fh->vb_vidq, &cx231xx_video_qops,
1700 					    NULL, &dev->video_mode.slock,
1701 					    fh->type, V4L2_FIELD_INTERLACED,
1702 					    sizeof(struct cx231xx_buffer),
1703 					    fh, &dev->lock);
1704 	if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
1705 		/* Set the required alternate setting  VBI interface works in
1706 		   Bulk mode only */
1707 		cx231xx_set_alt_setting(dev, INDEX_VANC, 0);
1708 
1709 		videobuf_queue_vmalloc_init(&fh->vb_vidq, &cx231xx_vbi_qops,
1710 					    NULL, &dev->vbi_mode.slock,
1711 					    fh->type, V4L2_FIELD_SEQ_TB,
1712 					    sizeof(struct cx231xx_buffer),
1713 					    fh, &dev->lock);
1714 	}
1715 	mutex_unlock(&dev->lock);
1716 	v4l2_fh_add(&fh->fh);
1717 
1718 	return 0;
1719 }
1720 
1721 /*
1722  * cx231xx_realease_resources()
1723  * unregisters the v4l2,i2c and usb devices
1724  * called when the device gets disconected or at module unload
1725 */
1726 void cx231xx_release_analog_resources(struct cx231xx *dev)
1727 {
1728 
1729 	/*FIXME: I2C IR should be disconnected */
1730 
1731 	if (dev->radio_dev) {
1732 		if (video_is_registered(dev->radio_dev))
1733 			video_unregister_device(dev->radio_dev);
1734 		else
1735 			video_device_release(dev->radio_dev);
1736 		dev->radio_dev = NULL;
1737 	}
1738 	if (dev->vbi_dev) {
1739 		cx231xx_info("V4L2 device %s deregistered\n",
1740 			     video_device_node_name(dev->vbi_dev));
1741 		if (video_is_registered(dev->vbi_dev))
1742 			video_unregister_device(dev->vbi_dev);
1743 		else
1744 			video_device_release(dev->vbi_dev);
1745 		dev->vbi_dev = NULL;
1746 	}
1747 	if (dev->vdev) {
1748 		cx231xx_info("V4L2 device %s deregistered\n",
1749 			     video_device_node_name(dev->vdev));
1750 
1751 		if (dev->board.has_417)
1752 			cx231xx_417_unregister(dev);
1753 
1754 		if (video_is_registered(dev->vdev))
1755 			video_unregister_device(dev->vdev);
1756 		else
1757 			video_device_release(dev->vdev);
1758 		dev->vdev = NULL;
1759 	}
1760 	v4l2_ctrl_handler_free(&dev->ctrl_handler);
1761 	v4l2_ctrl_handler_free(&dev->radio_ctrl_handler);
1762 }
1763 
1764 /*
1765  * cx231xx_close()
1766  * stops streaming and deallocates all resources allocated by the v4l2
1767  * calls and ioctls
1768  */
1769 static int cx231xx_close(struct file *filp)
1770 {
1771 	struct cx231xx_fh *fh = filp->private_data;
1772 	struct cx231xx *dev = fh->dev;
1773 
1774 	cx231xx_videodbg("users=%d\n", dev->users);
1775 
1776 	cx231xx_videodbg("users=%d\n", dev->users);
1777 	if (res_check(fh))
1778 		res_free(fh);
1779 
1780 	/*
1781 	 * To workaround error number=-71 on EP0 for VideoGrabber,
1782 	 *	 need exclude following.
1783 	 * FIXME: It is probably safe to remove most of these, as we're
1784 	 * now avoiding the alternate setting for INDEX_VANC
1785 	 */
1786 	if (!dev->board.no_alt_vanc)
1787 		if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
1788 			videobuf_stop(&fh->vb_vidq);
1789 			videobuf_mmap_free(&fh->vb_vidq);
1790 
1791 			/* the device is already disconnect,
1792 			   free the remaining resources */
1793 			if (dev->state & DEV_DISCONNECTED) {
1794 				if (atomic_read(&dev->devlist_count) > 0) {
1795 					cx231xx_release_resources(dev);
1796 					fh->dev = NULL;
1797 					return 0;
1798 				}
1799 				return 0;
1800 			}
1801 
1802 			/* do this before setting alternate! */
1803 			cx231xx_uninit_vbi_isoc(dev);
1804 
1805 			/* set alternate 0 */
1806 			if (!dev->vbi_or_sliced_cc_mode)
1807 				cx231xx_set_alt_setting(dev, INDEX_VANC, 0);
1808 			else
1809 				cx231xx_set_alt_setting(dev, INDEX_HANC, 0);
1810 
1811 			v4l2_fh_del(&fh->fh);
1812 			v4l2_fh_exit(&fh->fh);
1813 			kfree(fh);
1814 			dev->users--;
1815 			wake_up_interruptible_nr(&dev->open, 1);
1816 			return 0;
1817 		}
1818 
1819 	v4l2_fh_del(&fh->fh);
1820 	dev->users--;
1821 	if (!dev->users) {
1822 		videobuf_stop(&fh->vb_vidq);
1823 		videobuf_mmap_free(&fh->vb_vidq);
1824 
1825 		/* the device is already disconnect,
1826 		   free the remaining resources */
1827 		if (dev->state & DEV_DISCONNECTED) {
1828 			cx231xx_release_resources(dev);
1829 			fh->dev = NULL;
1830 			return 0;
1831 		}
1832 
1833 		/* Save some power by putting tuner to sleep */
1834 		call_all(dev, core, s_power, 0);
1835 
1836 		/* do this before setting alternate! */
1837 		if (dev->USE_ISO)
1838 			cx231xx_uninit_isoc(dev);
1839 		else
1840 			cx231xx_uninit_bulk(dev);
1841 		cx231xx_set_mode(dev, CX231XX_SUSPEND);
1842 
1843 		/* set alternate 0 */
1844 		cx231xx_set_alt_setting(dev, INDEX_VIDEO, 0);
1845 	}
1846 	v4l2_fh_exit(&fh->fh);
1847 	kfree(fh);
1848 	wake_up_interruptible_nr(&dev->open, 1);
1849 	return 0;
1850 }
1851 
1852 static int cx231xx_v4l2_close(struct file *filp)
1853 {
1854 	struct cx231xx_fh *fh = filp->private_data;
1855 	struct cx231xx *dev = fh->dev;
1856 	int rc;
1857 
1858 	mutex_lock(&dev->lock);
1859 	rc = cx231xx_close(filp);
1860 	mutex_unlock(&dev->lock);
1861 	return rc;
1862 }
1863 
1864 /*
1865  * cx231xx_v4l2_read()
1866  * will allocate buffers when called for the first time
1867  */
1868 static ssize_t
1869 cx231xx_v4l2_read(struct file *filp, char __user *buf, size_t count,
1870 		  loff_t *pos)
1871 {
1872 	struct cx231xx_fh *fh = filp->private_data;
1873 	struct cx231xx *dev = fh->dev;
1874 	int rc;
1875 
1876 	rc = check_dev(dev);
1877 	if (rc < 0)
1878 		return rc;
1879 
1880 	if ((fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) ||
1881 	    (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE)) {
1882 		rc = res_get(fh);
1883 
1884 		if (unlikely(rc < 0))
1885 			return rc;
1886 
1887 		if (mutex_lock_interruptible(&dev->lock))
1888 			return -ERESTARTSYS;
1889 		rc = videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0,
1890 					    filp->f_flags & O_NONBLOCK);
1891 		mutex_unlock(&dev->lock);
1892 		return rc;
1893 	}
1894 	return 0;
1895 }
1896 
1897 /*
1898  * cx231xx_v4l2_poll()
1899  * will allocate buffers when called for the first time
1900  */
1901 static unsigned int cx231xx_v4l2_poll(struct file *filp, poll_table *wait)
1902 {
1903 	unsigned long req_events = poll_requested_events(wait);
1904 	struct cx231xx_fh *fh = filp->private_data;
1905 	struct cx231xx *dev = fh->dev;
1906 	unsigned res = 0;
1907 	int rc;
1908 
1909 	rc = check_dev(dev);
1910 	if (rc < 0)
1911 		return POLLERR;
1912 
1913 	rc = res_get(fh);
1914 
1915 	if (unlikely(rc < 0))
1916 		return POLLERR;
1917 
1918 	if (v4l2_event_pending(&fh->fh))
1919 		res |= POLLPRI;
1920 	else
1921 		poll_wait(filp, &fh->fh.wait, wait);
1922 
1923 	if (!(req_events & (POLLIN | POLLRDNORM)))
1924 		return res;
1925 
1926 	if ((V4L2_BUF_TYPE_VIDEO_CAPTURE == fh->type) ||
1927 	    (V4L2_BUF_TYPE_VBI_CAPTURE == fh->type)) {
1928 		mutex_lock(&dev->lock);
1929 		res |= videobuf_poll_stream(filp, &fh->vb_vidq, wait);
1930 		mutex_unlock(&dev->lock);
1931 		return res;
1932 	}
1933 	return res | POLLERR;
1934 }
1935 
1936 /*
1937  * cx231xx_v4l2_mmap()
1938  */
1939 static int cx231xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
1940 {
1941 	struct cx231xx_fh *fh = filp->private_data;
1942 	struct cx231xx *dev = fh->dev;
1943 	int rc;
1944 
1945 	rc = check_dev(dev);
1946 	if (rc < 0)
1947 		return rc;
1948 
1949 	rc = res_get(fh);
1950 
1951 	if (unlikely(rc < 0))
1952 		return rc;
1953 
1954 	if (mutex_lock_interruptible(&dev->lock))
1955 		return -ERESTARTSYS;
1956 	rc = videobuf_mmap_mapper(&fh->vb_vidq, vma);
1957 	mutex_unlock(&dev->lock);
1958 
1959 	cx231xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n",
1960 			 (unsigned long)vma->vm_start,
1961 			 (unsigned long)vma->vm_end -
1962 			 (unsigned long)vma->vm_start, rc);
1963 
1964 	return rc;
1965 }
1966 
1967 static const struct v4l2_file_operations cx231xx_v4l_fops = {
1968 	.owner   = THIS_MODULE,
1969 	.open    = cx231xx_v4l2_open,
1970 	.release = cx231xx_v4l2_close,
1971 	.read    = cx231xx_v4l2_read,
1972 	.poll    = cx231xx_v4l2_poll,
1973 	.mmap    = cx231xx_v4l2_mmap,
1974 	.unlocked_ioctl   = video_ioctl2,
1975 };
1976 
1977 static const struct v4l2_ioctl_ops video_ioctl_ops = {
1978 	.vidioc_querycap               = cx231xx_querycap,
1979 	.vidioc_enum_fmt_vid_cap       = vidioc_enum_fmt_vid_cap,
1980 	.vidioc_g_fmt_vid_cap          = vidioc_g_fmt_vid_cap,
1981 	.vidioc_try_fmt_vid_cap        = vidioc_try_fmt_vid_cap,
1982 	.vidioc_s_fmt_vid_cap          = vidioc_s_fmt_vid_cap,
1983 	.vidioc_g_fmt_vbi_cap          = vidioc_g_fmt_vbi_cap,
1984 	.vidioc_try_fmt_vbi_cap        = vidioc_try_fmt_vbi_cap,
1985 	.vidioc_s_fmt_vbi_cap          = vidioc_s_fmt_vbi_cap,
1986 	.vidioc_cropcap                = vidioc_cropcap,
1987 	.vidioc_reqbufs                = vidioc_reqbufs,
1988 	.vidioc_querybuf               = vidioc_querybuf,
1989 	.vidioc_qbuf                   = vidioc_qbuf,
1990 	.vidioc_dqbuf                  = vidioc_dqbuf,
1991 	.vidioc_s_std                  = vidioc_s_std,
1992 	.vidioc_g_std                  = vidioc_g_std,
1993 	.vidioc_enum_input             = cx231xx_enum_input,
1994 	.vidioc_g_input                = cx231xx_g_input,
1995 	.vidioc_s_input                = cx231xx_s_input,
1996 	.vidioc_streamon               = vidioc_streamon,
1997 	.vidioc_streamoff              = vidioc_streamoff,
1998 	.vidioc_g_tuner                = cx231xx_g_tuner,
1999 	.vidioc_s_tuner                = cx231xx_s_tuner,
2000 	.vidioc_g_frequency            = cx231xx_g_frequency,
2001 	.vidioc_s_frequency            = cx231xx_s_frequency,
2002 #ifdef CONFIG_VIDEO_ADV_DEBUG
2003 	.vidioc_g_chip_info            = cx231xx_g_chip_info,
2004 	.vidioc_g_register             = cx231xx_g_register,
2005 	.vidioc_s_register             = cx231xx_s_register,
2006 #endif
2007 	.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
2008 	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
2009 };
2010 
2011 static struct video_device cx231xx_vbi_template;
2012 
2013 static const struct video_device cx231xx_video_template = {
2014 	.fops         = &cx231xx_v4l_fops,
2015 	.release      = video_device_release,
2016 	.ioctl_ops    = &video_ioctl_ops,
2017 	.tvnorms      = V4L2_STD_ALL,
2018 };
2019 
2020 static const struct v4l2_file_operations radio_fops = {
2021 	.owner   = THIS_MODULE,
2022 	.open   = cx231xx_v4l2_open,
2023 	.release = cx231xx_v4l2_close,
2024 	.poll = v4l2_ctrl_poll,
2025 	.unlocked_ioctl = video_ioctl2,
2026 };
2027 
2028 static const struct v4l2_ioctl_ops radio_ioctl_ops = {
2029 	.vidioc_querycap    = cx231xx_querycap,
2030 	.vidioc_g_tuner     = radio_g_tuner,
2031 	.vidioc_s_tuner     = radio_s_tuner,
2032 	.vidioc_g_frequency = cx231xx_g_frequency,
2033 	.vidioc_s_frequency = cx231xx_s_frequency,
2034 #ifdef CONFIG_VIDEO_ADV_DEBUG
2035 	.vidioc_g_chip_info = cx231xx_g_chip_info,
2036 	.vidioc_g_register  = cx231xx_g_register,
2037 	.vidioc_s_register  = cx231xx_s_register,
2038 #endif
2039 	.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
2040 	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
2041 };
2042 
2043 static struct video_device cx231xx_radio_template = {
2044 	.name      = "cx231xx-radio",
2045 	.fops      = &radio_fops,
2046 	.ioctl_ops = &radio_ioctl_ops,
2047 };
2048 
2049 /******************************** usb interface ******************************/
2050 
2051 static struct video_device *cx231xx_vdev_init(struct cx231xx *dev,
2052 		const struct video_device
2053 		*template, const char *type_name)
2054 {
2055 	struct video_device *vfd;
2056 
2057 	vfd = video_device_alloc();
2058 	if (NULL == vfd)
2059 		return NULL;
2060 
2061 	*vfd = *template;
2062 	vfd->v4l2_dev = &dev->v4l2_dev;
2063 	vfd->release = video_device_release;
2064 	vfd->debug = video_debug;
2065 	vfd->lock = &dev->lock;
2066 
2067 	snprintf(vfd->name, sizeof(vfd->name), "%s %s", dev->name, type_name);
2068 
2069 	video_set_drvdata(vfd, dev);
2070 	if (dev->tuner_type == TUNER_ABSENT) {
2071 		v4l2_disable_ioctl(vfd, VIDIOC_G_FREQUENCY);
2072 		v4l2_disable_ioctl(vfd, VIDIOC_S_FREQUENCY);
2073 		v4l2_disable_ioctl(vfd, VIDIOC_G_TUNER);
2074 		v4l2_disable_ioctl(vfd, VIDIOC_S_TUNER);
2075 	}
2076 	return vfd;
2077 }
2078 
2079 int cx231xx_register_analog_devices(struct cx231xx *dev)
2080 {
2081 	int ret;
2082 
2083 	cx231xx_info("%s: v4l2 driver version %s\n",
2084 		     dev->name, CX231XX_VERSION);
2085 
2086 	/* set default norm */
2087 	dev->norm = V4L2_STD_PAL;
2088 	dev->width = norm_maxw(dev);
2089 	dev->height = norm_maxh(dev);
2090 	dev->interlaced = 0;
2091 
2092 	/* Analog specific initialization */
2093 	dev->format = &format[0];
2094 
2095 	/* Set the initial input */
2096 	video_mux(dev, dev->video_input);
2097 
2098 	call_all(dev, video, s_std, dev->norm);
2099 
2100 	v4l2_ctrl_handler_init(&dev->ctrl_handler, 10);
2101 	v4l2_ctrl_handler_init(&dev->radio_ctrl_handler, 5);
2102 
2103 	if (dev->sd_cx25840) {
2104 		v4l2_ctrl_add_handler(&dev->ctrl_handler,
2105 				dev->sd_cx25840->ctrl_handler, NULL);
2106 		v4l2_ctrl_add_handler(&dev->radio_ctrl_handler,
2107 				dev->sd_cx25840->ctrl_handler,
2108 				v4l2_ctrl_radio_filter);
2109 	}
2110 
2111 	if (dev->ctrl_handler.error)
2112 		return dev->ctrl_handler.error;
2113 	if (dev->radio_ctrl_handler.error)
2114 		return dev->radio_ctrl_handler.error;
2115 
2116 	/* enable vbi capturing */
2117 	/* write code here...  */
2118 
2119 	/* allocate and fill video video_device struct */
2120 	dev->vdev = cx231xx_vdev_init(dev, &cx231xx_video_template, "video");
2121 	if (!dev->vdev) {
2122 		cx231xx_errdev("cannot allocate video_device.\n");
2123 		return -ENODEV;
2124 	}
2125 
2126 	dev->vdev->ctrl_handler = &dev->ctrl_handler;
2127 	/* register v4l2 video video_device */
2128 	ret = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
2129 				    video_nr[dev->devno]);
2130 	if (ret) {
2131 		cx231xx_errdev("unable to register video device (error=%i).\n",
2132 			       ret);
2133 		return ret;
2134 	}
2135 
2136 	cx231xx_info("%s/0: registered device %s [v4l2]\n",
2137 		     dev->name, video_device_node_name(dev->vdev));
2138 
2139 	/* Initialize VBI template */
2140 	cx231xx_vbi_template = cx231xx_video_template;
2141 	strcpy(cx231xx_vbi_template.name, "cx231xx-vbi");
2142 
2143 	/* Allocate and fill vbi video_device struct */
2144 	dev->vbi_dev = cx231xx_vdev_init(dev, &cx231xx_vbi_template, "vbi");
2145 
2146 	if (!dev->vbi_dev) {
2147 		cx231xx_errdev("cannot allocate video_device.\n");
2148 		return -ENODEV;
2149 	}
2150 	dev->vbi_dev->ctrl_handler = &dev->ctrl_handler;
2151 	/* register v4l2 vbi video_device */
2152 	ret = video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
2153 				    vbi_nr[dev->devno]);
2154 	if (ret < 0) {
2155 		cx231xx_errdev("unable to register vbi device\n");
2156 		return ret;
2157 	}
2158 
2159 	cx231xx_info("%s/0: registered device %s\n",
2160 		     dev->name, video_device_node_name(dev->vbi_dev));
2161 
2162 	if (cx231xx_boards[dev->model].radio.type == CX231XX_RADIO) {
2163 		dev->radio_dev = cx231xx_vdev_init(dev, &cx231xx_radio_template,
2164 						   "radio");
2165 		if (!dev->radio_dev) {
2166 			cx231xx_errdev("cannot allocate video_device.\n");
2167 			return -ENODEV;
2168 		}
2169 		dev->radio_dev->ctrl_handler = &dev->radio_ctrl_handler;
2170 		ret = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
2171 					    radio_nr[dev->devno]);
2172 		if (ret < 0) {
2173 			cx231xx_errdev("can't register radio device\n");
2174 			return ret;
2175 		}
2176 		cx231xx_info("Registered radio device as %s\n",
2177 			     video_device_node_name(dev->radio_dev));
2178 	}
2179 
2180 	cx231xx_info("V4L2 device registered as %s and %s\n",
2181 		     video_device_node_name(dev->vdev),
2182 		     video_device_node_name(dev->vbi_dev));
2183 
2184 	return 0;
2185 }
2186