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 "cx231xx.h"
26 #include <linux/init.h>
27 #include <linux/list.h>
28 #include <linux/module.h>
29 #include <linux/kernel.h>
30 #include <linux/bitmap.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-vbi.h"
45 
46 #define CX231XX_VERSION "0.0.3"
47 
48 #define DRIVER_AUTHOR   "Srinivasa Deevi <srinivasa.deevi@conexant.com>"
49 #define DRIVER_DESC     "Conexant cx231xx based USB video device driver"
50 
51 #define cx231xx_videodbg(fmt, arg...) do {\
52 	if (video_debug) \
53 		printk(KERN_INFO "%s %s :"fmt, \
54 			 dev->name, __func__ , ##arg); } while (0)
55 
56 static unsigned int isoc_debug;
57 module_param(isoc_debug, int, 0644);
58 MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
59 
60 #define cx231xx_isocdbg(fmt, arg...) \
61 do {\
62 	if (isoc_debug) { \
63 		printk(KERN_INFO "%s %s :"fmt, \
64 			 dev->name, __func__ , ##arg); \
65 	} \
66   } while (0)
67 
68 MODULE_AUTHOR(DRIVER_AUTHOR);
69 MODULE_DESCRIPTION(DRIVER_DESC);
70 MODULE_LICENSE("GPL");
71 MODULE_VERSION(CX231XX_VERSION);
72 
73 static unsigned int card[]     = {[0 ... (CX231XX_MAXBOARDS - 1)] = UNSET };
74 static unsigned int video_nr[] = {[0 ... (CX231XX_MAXBOARDS - 1)] = UNSET };
75 static unsigned int vbi_nr[]   = {[0 ... (CX231XX_MAXBOARDS - 1)] = UNSET };
76 static unsigned int radio_nr[] = {[0 ... (CX231XX_MAXBOARDS - 1)] = UNSET };
77 
78 module_param_array(card, int, NULL, 0444);
79 module_param_array(video_nr, int, NULL, 0444);
80 module_param_array(vbi_nr, int, NULL, 0444);
81 module_param_array(radio_nr, int, NULL, 0444);
82 
83 MODULE_PARM_DESC(card, "card type");
84 MODULE_PARM_DESC(video_nr, "video device numbers");
85 MODULE_PARM_DESC(vbi_nr, "vbi device numbers");
86 MODULE_PARM_DESC(radio_nr, "radio device numbers");
87 
88 static unsigned int video_debug;
89 module_param(video_debug, int, 0644);
90 MODULE_PARM_DESC(video_debug, "enable debug messages [video]");
91 
92 /* supported video standards */
93 static struct cx231xx_fmt format[] = {
94 	{
95 	 .name = "16bpp YUY2, 4:2:2, packed",
96 	 .fourcc = V4L2_PIX_FMT_YUYV,
97 	 .depth = 16,
98 	 .reg = 0,
99 	 },
100 };
101 
102 
103 /* ------------------------------------------------------------------
104 	Video buffer and parser functions
105    ------------------------------------------------------------------*/
106 
107 /*
108  * Announces that a buffer were filled and request the next
109  */
110 static inline void buffer_filled(struct cx231xx *dev,
111 				 struct cx231xx_dmaqueue *dma_q,
112 				 struct cx231xx_buffer *buf)
113 {
114 	/* Advice that buffer was filled */
115 	cx231xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i);
116 	buf->vb.state = VIDEOBUF_DONE;
117 	buf->vb.field_count++;
118 	v4l2_get_timestamp(&buf->vb.ts);
119 
120 	if (dev->USE_ISO)
121 		dev->video_mode.isoc_ctl.buf = NULL;
122 	else
123 		dev->video_mode.bulk_ctl.buf = NULL;
124 
125 	list_del(&buf->vb.queue);
126 	wake_up(&buf->vb.done);
127 }
128 
129 static inline void print_err_status(struct cx231xx *dev, int packet, int status)
130 {
131 	char *errmsg = "Unknown";
132 
133 	switch (status) {
134 	case -ENOENT:
135 		errmsg = "unlinked synchronuously";
136 		break;
137 	case -ECONNRESET:
138 		errmsg = "unlinked asynchronuously";
139 		break;
140 	case -ENOSR:
141 		errmsg = "Buffer error (overrun)";
142 		break;
143 	case -EPIPE:
144 		errmsg = "Stalled (device not responding)";
145 		break;
146 	case -EOVERFLOW:
147 		errmsg = "Babble (bad cable?)";
148 		break;
149 	case -EPROTO:
150 		errmsg = "Bit-stuff error (bad cable?)";
151 		break;
152 	case -EILSEQ:
153 		errmsg = "CRC/Timeout (could be anything)";
154 		break;
155 	case -ETIME:
156 		errmsg = "Device does not respond";
157 		break;
158 	}
159 	if (packet < 0) {
160 		cx231xx_isocdbg("URB status %d [%s].\n", status, errmsg);
161 	} else {
162 		cx231xx_isocdbg("URB packet %d, status %d [%s].\n",
163 				packet, status, errmsg);
164 	}
165 }
166 
167 /*
168  * video-buf generic routine to get the next available buffer
169  */
170 static inline void get_next_buf(struct cx231xx_dmaqueue *dma_q,
171 				struct cx231xx_buffer **buf)
172 {
173 	struct cx231xx_video_mode *vmode =
174 	    container_of(dma_q, struct cx231xx_video_mode, vidq);
175 	struct cx231xx *dev = container_of(vmode, struct cx231xx, video_mode);
176 
177 	char *outp;
178 
179 	if (list_empty(&dma_q->active)) {
180 		cx231xx_isocdbg("No active queue to serve\n");
181 		if (dev->USE_ISO)
182 			dev->video_mode.isoc_ctl.buf = NULL;
183 		else
184 			dev->video_mode.bulk_ctl.buf = NULL;
185 		*buf = NULL;
186 		return;
187 	}
188 
189 	/* Get the next buffer */
190 	*buf = list_entry(dma_q->active.next, struct cx231xx_buffer, vb.queue);
191 
192 	/* Cleans up buffer - Useful for testing for frame/URB loss */
193 	outp = videobuf_to_vmalloc(&(*buf)->vb);
194 	memset(outp, 0, (*buf)->vb.size);
195 
196 	if (dev->USE_ISO)
197 		dev->video_mode.isoc_ctl.buf = *buf;
198 	else
199 		dev->video_mode.bulk_ctl.buf = *buf;
200 
201 	return;
202 }
203 
204 /*
205  * Controls the isoc copy of each urb packet
206  */
207 static inline int cx231xx_isoc_copy(struct cx231xx *dev, struct urb *urb)
208 {
209 	struct cx231xx_dmaqueue *dma_q = urb->context;
210 	int i;
211 	unsigned char *p_buffer;
212 	u32 bytes_parsed = 0, buffer_size = 0;
213 	u8 sav_eav = 0;
214 
215 	if (!dev)
216 		return 0;
217 
218 	if (dev->state & DEV_DISCONNECTED)
219 		return 0;
220 
221 	if (urb->status < 0) {
222 		print_err_status(dev, -1, urb->status);
223 		if (urb->status == -ENOENT)
224 			return 0;
225 	}
226 
227 	for (i = 0; i < urb->number_of_packets; i++) {
228 		int status = urb->iso_frame_desc[i].status;
229 
230 		if (status < 0) {
231 			print_err_status(dev, i, status);
232 			if (urb->iso_frame_desc[i].status != -EPROTO)
233 				continue;
234 		}
235 
236 		if (urb->iso_frame_desc[i].actual_length <= 0) {
237 			/* cx231xx_isocdbg("packet %d is empty",i); - spammy */
238 			continue;
239 		}
240 		if (urb->iso_frame_desc[i].actual_length >
241 		    dev->video_mode.max_pkt_size) {
242 			cx231xx_isocdbg("packet bigger than packet size");
243 			continue;
244 		}
245 
246 		/*  get buffer pointer and length */
247 		p_buffer = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
248 		buffer_size = urb->iso_frame_desc[i].actual_length;
249 		bytes_parsed = 0;
250 
251 		if (dma_q->is_partial_line) {
252 			/* Handle the case of a partial line */
253 			sav_eav = dma_q->last_sav;
254 		} else {
255 			/* Check for a SAV/EAV overlapping
256 				the buffer boundary */
257 			sav_eav =
258 			    cx231xx_find_boundary_SAV_EAV(p_buffer,
259 							  dma_q->partial_buf,
260 							  &bytes_parsed);
261 		}
262 
263 		sav_eav &= 0xF0;
264 		/* Get the first line if we have some portion of an SAV/EAV from
265 		   the last buffer or a partial line  */
266 		if (sav_eav) {
267 			bytes_parsed += cx231xx_get_video_line(dev, dma_q,
268 				sav_eav,	/* SAV/EAV */
269 				p_buffer + bytes_parsed,	/* p_buffer */
270 				buffer_size - bytes_parsed);/* buf size */
271 		}
272 
273 		/* Now parse data that is completely in this buffer */
274 		/* dma_q->is_partial_line = 0;  */
275 
276 		while (bytes_parsed < buffer_size) {
277 			u32 bytes_used = 0;
278 
279 			sav_eav = cx231xx_find_next_SAV_EAV(
280 				p_buffer + bytes_parsed,	/* p_buffer */
281 				buffer_size - bytes_parsed,	/* buf size */
282 				&bytes_used);/* bytes used to get SAV/EAV */
283 
284 			bytes_parsed += bytes_used;
285 
286 			sav_eav &= 0xF0;
287 			if (sav_eav && (bytes_parsed < buffer_size)) {
288 				bytes_parsed += cx231xx_get_video_line(dev,
289 					dma_q, sav_eav,	/* SAV/EAV */
290 					p_buffer + bytes_parsed,/* p_buffer */
291 					buffer_size - bytes_parsed);/*buf size*/
292 			}
293 		}
294 
295 		/* Save the last four bytes of the buffer so we can check the
296 		   buffer boundary condition next time */
297 		memcpy(dma_q->partial_buf, p_buffer + buffer_size - 4, 4);
298 		bytes_parsed = 0;
299 
300 	}
301 	return 1;
302 }
303 
304 static inline int cx231xx_bulk_copy(struct cx231xx *dev, struct urb *urb)
305 {
306 	struct cx231xx_dmaqueue *dma_q = urb->context;
307 	unsigned char *p_buffer;
308 	u32 bytes_parsed = 0, buffer_size = 0;
309 	u8 sav_eav = 0;
310 
311 	if (!dev)
312 		return 0;
313 
314 	if (dev->state & DEV_DISCONNECTED)
315 		return 0;
316 
317 	if (urb->status < 0) {
318 		print_err_status(dev, -1, urb->status);
319 		if (urb->status == -ENOENT)
320 			return 0;
321 	}
322 
323 	if (1) {
324 
325 		/*  get buffer pointer and length */
326 		p_buffer = urb->transfer_buffer;
327 		buffer_size = urb->actual_length;
328 		bytes_parsed = 0;
329 
330 		if (dma_q->is_partial_line) {
331 			/* Handle the case of a partial line */
332 			sav_eav = dma_q->last_sav;
333 		} else {
334 			/* Check for a SAV/EAV overlapping
335 				the buffer boundary */
336 			sav_eav =
337 			    cx231xx_find_boundary_SAV_EAV(p_buffer,
338 							  dma_q->partial_buf,
339 							  &bytes_parsed);
340 		}
341 
342 		sav_eav &= 0xF0;
343 		/* Get the first line if we have some portion of an SAV/EAV from
344 		   the last buffer or a partial line  */
345 		if (sav_eav) {
346 			bytes_parsed += cx231xx_get_video_line(dev, dma_q,
347 				sav_eav,	/* SAV/EAV */
348 				p_buffer + bytes_parsed,	/* p_buffer */
349 				buffer_size - bytes_parsed);/* buf size */
350 		}
351 
352 		/* Now parse data that is completely in this buffer */
353 		/* dma_q->is_partial_line = 0;  */
354 
355 		while (bytes_parsed < buffer_size) {
356 			u32 bytes_used = 0;
357 
358 			sav_eav = cx231xx_find_next_SAV_EAV(
359 				p_buffer + bytes_parsed,	/* p_buffer */
360 				buffer_size - bytes_parsed,	/* buf size */
361 				&bytes_used);/* bytes used to get SAV/EAV */
362 
363 			bytes_parsed += bytes_used;
364 
365 			sav_eav &= 0xF0;
366 			if (sav_eav && (bytes_parsed < buffer_size)) {
367 				bytes_parsed += cx231xx_get_video_line(dev,
368 					dma_q, sav_eav,	/* SAV/EAV */
369 					p_buffer + bytes_parsed,/* p_buffer */
370 					buffer_size - bytes_parsed);/*buf size*/
371 			}
372 		}
373 
374 		/* Save the last four bytes of the buffer so we can check the
375 		   buffer boundary condition next time */
376 		memcpy(dma_q->partial_buf, p_buffer + buffer_size - 4, 4);
377 		bytes_parsed = 0;
378 
379 	}
380 	return 1;
381 }
382 
383 
384 u8 cx231xx_find_boundary_SAV_EAV(u8 *p_buffer, u8 *partial_buf,
385 				 u32 *p_bytes_used)
386 {
387 	u32 bytes_used;
388 	u8 boundary_bytes[8];
389 	u8 sav_eav = 0;
390 
391 	*p_bytes_used = 0;
392 
393 	/* Create an array of the last 4 bytes of the last buffer and the first
394 	   4 bytes of the current buffer. */
395 
396 	memcpy(boundary_bytes, partial_buf, 4);
397 	memcpy(boundary_bytes + 4, p_buffer, 4);
398 
399 	/* Check for the SAV/EAV in the boundary buffer */
400 	sav_eav = cx231xx_find_next_SAV_EAV((u8 *)&boundary_bytes, 8,
401 					    &bytes_used);
402 
403 	if (sav_eav) {
404 		/* found a boundary SAV/EAV.  Updates the bytes used to reflect
405 		   only those used in the new buffer */
406 		*p_bytes_used = bytes_used - 4;
407 	}
408 
409 	return sav_eav;
410 }
411 
412 u8 cx231xx_find_next_SAV_EAV(u8 *p_buffer, u32 buffer_size, u32 *p_bytes_used)
413 {
414 	u32 i;
415 	u8 sav_eav = 0;
416 
417 	/*
418 	 * Don't search if the buffer size is less than 4.  It causes a page
419 	 * fault since buffer_size - 4 evaluates to a large number in that
420 	 * case.
421 	 */
422 	if (buffer_size < 4) {
423 		*p_bytes_used = buffer_size;
424 		return 0;
425 	}
426 
427 	for (i = 0; i < (buffer_size - 3); i++) {
428 
429 		if ((p_buffer[i] == 0xFF) &&
430 		    (p_buffer[i + 1] == 0x00) && (p_buffer[i + 2] == 0x00)) {
431 
432 			*p_bytes_used = i + 4;
433 			sav_eav = p_buffer[i + 3];
434 			return sav_eav;
435 		}
436 	}
437 
438 	*p_bytes_used = buffer_size;
439 	return 0;
440 }
441 
442 u32 cx231xx_get_video_line(struct cx231xx *dev,
443 			   struct cx231xx_dmaqueue *dma_q, u8 sav_eav,
444 			   u8 *p_buffer, u32 buffer_size)
445 {
446 	u32 bytes_copied = 0;
447 	int current_field = -1;
448 
449 	switch (sav_eav) {
450 	case SAV_ACTIVE_VIDEO_FIELD1:
451 		/* looking for skipped line which occurred in PAL 720x480 mode.
452 		   In this case, there will be no active data contained
453 		   between the SAV and EAV */
454 		if ((buffer_size > 3) && (p_buffer[0] == 0xFF) &&
455 		    (p_buffer[1] == 0x00) && (p_buffer[2] == 0x00) &&
456 		    ((p_buffer[3] == EAV_ACTIVE_VIDEO_FIELD1) ||
457 		     (p_buffer[3] == EAV_ACTIVE_VIDEO_FIELD2) ||
458 		     (p_buffer[3] == EAV_VBLANK_FIELD1) ||
459 		     (p_buffer[3] == EAV_VBLANK_FIELD2)))
460 			return bytes_copied;
461 		current_field = 1;
462 		break;
463 
464 	case SAV_ACTIVE_VIDEO_FIELD2:
465 		/* looking for skipped line which occurred in PAL 720x480 mode.
466 		   In this case, there will be no active data contained between
467 		   the SAV and EAV */
468 		if ((buffer_size > 3) && (p_buffer[0] == 0xFF) &&
469 		    (p_buffer[1] == 0x00) && (p_buffer[2] == 0x00) &&
470 		    ((p_buffer[3] == EAV_ACTIVE_VIDEO_FIELD1) ||
471 		     (p_buffer[3] == EAV_ACTIVE_VIDEO_FIELD2) ||
472 		     (p_buffer[3] == EAV_VBLANK_FIELD1)       ||
473 		     (p_buffer[3] == EAV_VBLANK_FIELD2)))
474 			return bytes_copied;
475 		current_field = 2;
476 		break;
477 	}
478 
479 	dma_q->last_sav = sav_eav;
480 
481 	bytes_copied = cx231xx_copy_video_line(dev, dma_q, p_buffer,
482 					       buffer_size, current_field);
483 
484 	return bytes_copied;
485 }
486 
487 u32 cx231xx_copy_video_line(struct cx231xx *dev,
488 			    struct cx231xx_dmaqueue *dma_q, u8 *p_line,
489 			    u32 length, int field_number)
490 {
491 	u32 bytes_to_copy;
492 	struct cx231xx_buffer *buf;
493 	u32 _line_size = dev->width * 2;
494 
495 	if (dma_q->current_field != field_number)
496 		cx231xx_reset_video_buffer(dev, dma_q);
497 
498 	/* get the buffer pointer */
499 	if (dev->USE_ISO)
500 		buf = dev->video_mode.isoc_ctl.buf;
501 	else
502 		buf = dev->video_mode.bulk_ctl.buf;
503 
504 	/* Remember the field number for next time */
505 	dma_q->current_field = field_number;
506 
507 	bytes_to_copy = dma_q->bytes_left_in_line;
508 	if (bytes_to_copy > length)
509 		bytes_to_copy = length;
510 
511 	if (dma_q->lines_completed >= dma_q->lines_per_field) {
512 		dma_q->bytes_left_in_line -= bytes_to_copy;
513 		dma_q->is_partial_line = (dma_q->bytes_left_in_line == 0) ?
514 					  0 : 1;
515 		return 0;
516 	}
517 
518 	dma_q->is_partial_line = 1;
519 
520 	/* If we don't have a buffer, just return the number of bytes we would
521 	   have copied if we had a buffer. */
522 	if (!buf) {
523 		dma_q->bytes_left_in_line -= bytes_to_copy;
524 		dma_q->is_partial_line = (dma_q->bytes_left_in_line == 0)
525 					 ? 0 : 1;
526 		return bytes_to_copy;
527 	}
528 
529 	/* copy the data to video buffer */
530 	cx231xx_do_copy(dev, dma_q, p_line, bytes_to_copy);
531 
532 	dma_q->pos += bytes_to_copy;
533 	dma_q->bytes_left_in_line -= bytes_to_copy;
534 
535 	if (dma_q->bytes_left_in_line == 0) {
536 		dma_q->bytes_left_in_line = _line_size;
537 		dma_q->lines_completed++;
538 		dma_q->is_partial_line = 0;
539 
540 		if (cx231xx_is_buffer_done(dev, dma_q) && buf) {
541 			buffer_filled(dev, dma_q, buf);
542 
543 			dma_q->pos = 0;
544 			buf = NULL;
545 			dma_q->lines_completed = 0;
546 		}
547 	}
548 
549 	return bytes_to_copy;
550 }
551 
552 void cx231xx_reset_video_buffer(struct cx231xx *dev,
553 				struct cx231xx_dmaqueue *dma_q)
554 {
555 	struct cx231xx_buffer *buf;
556 
557 	/* handle the switch from field 1 to field 2 */
558 	if (dma_q->current_field == 1) {
559 		if (dma_q->lines_completed >= dma_q->lines_per_field)
560 			dma_q->field1_done = 1;
561 		else
562 			dma_q->field1_done = 0;
563 	}
564 
565 	if (dev->USE_ISO)
566 		buf = dev->video_mode.isoc_ctl.buf;
567 	else
568 		buf = dev->video_mode.bulk_ctl.buf;
569 
570 	if (buf == NULL) {
571 		/* first try to get the buffer */
572 		get_next_buf(dma_q, &buf);
573 
574 		dma_q->pos = 0;
575 		dma_q->field1_done = 0;
576 		dma_q->current_field = -1;
577 	}
578 
579 	/* reset the counters */
580 	dma_q->bytes_left_in_line = dev->width << 1;
581 	dma_q->lines_completed = 0;
582 }
583 
584 int cx231xx_do_copy(struct cx231xx *dev, struct cx231xx_dmaqueue *dma_q,
585 		    u8 *p_buffer, u32 bytes_to_copy)
586 {
587 	u8 *p_out_buffer = NULL;
588 	u32 current_line_bytes_copied = 0;
589 	struct cx231xx_buffer *buf;
590 	u32 _line_size = dev->width << 1;
591 	void *startwrite;
592 	int offset, lencopy;
593 
594 	if (dev->USE_ISO)
595 		buf = dev->video_mode.isoc_ctl.buf;
596 	else
597 		buf = dev->video_mode.bulk_ctl.buf;
598 
599 	if (buf == NULL)
600 		return -1;
601 
602 	p_out_buffer = videobuf_to_vmalloc(&buf->vb);
603 
604 	current_line_bytes_copied = _line_size - dma_q->bytes_left_in_line;
605 
606 	/* Offset field 2 one line from the top of the buffer */
607 	offset = (dma_q->current_field == 1) ? 0 : _line_size;
608 
609 	/* Offset for field 2 */
610 	startwrite = p_out_buffer + offset;
611 
612 	/* lines already completed in the current field */
613 	startwrite += (dma_q->lines_completed * _line_size * 2);
614 
615 	/* bytes already completed in the current line */
616 	startwrite += current_line_bytes_copied;
617 
618 	lencopy = dma_q->bytes_left_in_line > bytes_to_copy ?
619 		  bytes_to_copy : dma_q->bytes_left_in_line;
620 
621 	if ((u8 *)(startwrite + lencopy) > (u8 *)(p_out_buffer + buf->vb.size))
622 		return 0;
623 
624 	/* The below copies the UYVY data straight into video buffer */
625 	cx231xx_swab((u16 *) p_buffer, (u16 *) startwrite, (u16) lencopy);
626 
627 	return 0;
628 }
629 
630 void cx231xx_swab(u16 *from, u16 *to, u16 len)
631 {
632 	u16 i;
633 
634 	if (len <= 0)
635 		return;
636 
637 	for (i = 0; i < len / 2; i++)
638 		to[i] = (from[i] << 8) | (from[i] >> 8);
639 }
640 
641 u8 cx231xx_is_buffer_done(struct cx231xx *dev, struct cx231xx_dmaqueue *dma_q)
642 {
643 	u8 buffer_complete = 0;
644 
645 	/* Dual field stream */
646 	buffer_complete = ((dma_q->current_field == 2) &&
647 			   (dma_q->lines_completed >= dma_q->lines_per_field) &&
648 			    dma_q->field1_done);
649 
650 	return buffer_complete;
651 }
652 
653 /* ------------------------------------------------------------------
654 	Videobuf operations
655    ------------------------------------------------------------------*/
656 
657 static int
658 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
659 {
660 	struct cx231xx_fh *fh = vq->priv_data;
661 	struct cx231xx *dev = fh->dev;
662 
663 	*size = (fh->dev->width * fh->dev->height * dev->format->depth + 7)>>3;
664 	if (0 == *count)
665 		*count = CX231XX_DEF_BUF;
666 
667 	if (*count < CX231XX_MIN_BUF)
668 		*count = CX231XX_MIN_BUF;
669 
670 	return 0;
671 }
672 
673 /* This is called *without* dev->slock held; please keep it that way */
674 static void free_buffer(struct videobuf_queue *vq, struct cx231xx_buffer *buf)
675 {
676 	struct cx231xx_fh *fh = vq->priv_data;
677 	struct cx231xx *dev = fh->dev;
678 	unsigned long flags = 0;
679 
680 	if (in_interrupt())
681 		BUG();
682 
683 	/* We used to wait for the buffer to finish here, but this didn't work
684 	   because, as we were keeping the state as VIDEOBUF_QUEUED,
685 	   videobuf_queue_cancel marked it as finished for us.
686 	   (Also, it could wedge forever if the hardware was misconfigured.)
687 
688 	   This should be safe; by the time we get here, the buffer isn't
689 	   queued anymore. If we ever start marking the buffers as
690 	   VIDEOBUF_ACTIVE, it won't be, though.
691 	 */
692 	spin_lock_irqsave(&dev->video_mode.slock, flags);
693 	if (dev->USE_ISO) {
694 		if (dev->video_mode.isoc_ctl.buf == buf)
695 			dev->video_mode.isoc_ctl.buf = NULL;
696 	} else {
697 		if (dev->video_mode.bulk_ctl.buf == buf)
698 			dev->video_mode.bulk_ctl.buf = NULL;
699 	}
700 	spin_unlock_irqrestore(&dev->video_mode.slock, flags);
701 
702 	videobuf_vmalloc_free(&buf->vb);
703 	buf->vb.state = VIDEOBUF_NEEDS_INIT;
704 }
705 
706 static int
707 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
708 	       enum v4l2_field field)
709 {
710 	struct cx231xx_fh *fh = vq->priv_data;
711 	struct cx231xx_buffer *buf =
712 	    container_of(vb, struct cx231xx_buffer, vb);
713 	struct cx231xx *dev = fh->dev;
714 	int rc = 0, urb_init = 0;
715 
716 	/* The only currently supported format is 16 bits/pixel */
717 	buf->vb.size = (fh->dev->width * fh->dev->height * dev->format->depth
718 			+ 7) >> 3;
719 	if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
720 		return -EINVAL;
721 
722 	buf->vb.width = dev->width;
723 	buf->vb.height = dev->height;
724 	buf->vb.field = field;
725 
726 	if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
727 		rc = videobuf_iolock(vq, &buf->vb, NULL);
728 		if (rc < 0)
729 			goto fail;
730 	}
731 
732 	if (dev->USE_ISO) {
733 		if (!dev->video_mode.isoc_ctl.num_bufs)
734 			urb_init = 1;
735 	} else {
736 		if (!dev->video_mode.bulk_ctl.num_bufs)
737 			urb_init = 1;
738 	}
739 	dev_dbg(dev->dev,
740 		"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 	dev_dbg(dev->dev, "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 		dev_err(dev->dev, "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 		dev_err(dev->dev, "%s: queue busy\n", __func__);
957 		return -EBUSY;
958 	}
959 
960 	if (dev->stream_on && !fh->stream_on) {
961 		dev_err(dev->dev,
962 			"%s: device in use by another fh\n", __func__);
963 		return -EBUSY;
964 	}
965 
966 	/* set new image size */
967 	dev->width = f->fmt.pix.width;
968 	dev->height = f->fmt.pix.height;
969 	dev->format = fmt;
970 
971 	v4l2_fill_mbus_format(&mbus_fmt, &f->fmt.pix, MEDIA_BUS_FMT_FIXED);
972 	call_all(dev, video, s_mbus_fmt, &mbus_fmt);
973 	v4l2_fill_pix_format(&f->fmt.pix, &mbus_fmt);
974 
975 	return rc;
976 }
977 
978 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *id)
979 {
980 	struct cx231xx_fh *fh = priv;
981 	struct cx231xx *dev = fh->dev;
982 
983 	*id = dev->norm;
984 	return 0;
985 }
986 
987 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm)
988 {
989 	struct cx231xx_fh *fh = priv;
990 	struct cx231xx *dev = fh->dev;
991 	struct v4l2_mbus_framefmt mbus_fmt;
992 	int rc;
993 
994 	rc = check_dev(dev);
995 	if (rc < 0)
996 		return rc;
997 
998 	if (dev->norm == norm)
999 		return 0;
1000 
1001 	if (videobuf_queue_is_busy(&fh->vb_vidq))
1002 		return -EBUSY;
1003 
1004 	dev->norm = norm;
1005 
1006 	/* Adjusts width/height, if needed */
1007 	dev->width = 720;
1008 	dev->height = (dev->norm & V4L2_STD_625_50) ? 576 : 480;
1009 
1010 	call_all(dev, video, s_std, dev->norm);
1011 
1012 	/* We need to reset basic properties in the decoder related to
1013 	   resolution (since a standard change effects things like the number
1014 	   of lines in VACT, etc) */
1015 	memset(&mbus_fmt, 0, sizeof(mbus_fmt));
1016 	mbus_fmt.code = MEDIA_BUS_FMT_FIXED;
1017 	mbus_fmt.width = dev->width;
1018 	mbus_fmt.height = dev->height;
1019 	call_all(dev, video, s_mbus_fmt, &mbus_fmt);
1020 
1021 	/* do mode control overrides */
1022 	cx231xx_do_mode_ctrl_overrides(dev);
1023 
1024 	return 0;
1025 }
1026 
1027 static const char *iname[] = {
1028 	[CX231XX_VMUX_COMPOSITE1] = "Composite1",
1029 	[CX231XX_VMUX_SVIDEO]     = "S-Video",
1030 	[CX231XX_VMUX_TELEVISION] = "Television",
1031 	[CX231XX_VMUX_CABLE]      = "Cable TV",
1032 	[CX231XX_VMUX_DVB]        = "DVB",
1033 	[CX231XX_VMUX_DEBUG]      = "for debug only",
1034 };
1035 
1036 int cx231xx_enum_input(struct file *file, void *priv,
1037 			     struct v4l2_input *i)
1038 {
1039 	struct cx231xx_fh *fh = priv;
1040 	struct cx231xx *dev = fh->dev;
1041 	u32 gen_stat;
1042 	unsigned int ret, n;
1043 
1044 	n = i->index;
1045 	if (n >= MAX_CX231XX_INPUT)
1046 		return -EINVAL;
1047 	if (0 == INPUT(n)->type)
1048 		return -EINVAL;
1049 
1050 	i->index = n;
1051 	i->type = V4L2_INPUT_TYPE_CAMERA;
1052 
1053 	strcpy(i->name, iname[INPUT(n)->type]);
1054 
1055 	if ((CX231XX_VMUX_TELEVISION == INPUT(n)->type) ||
1056 	    (CX231XX_VMUX_CABLE == INPUT(n)->type))
1057 		i->type = V4L2_INPUT_TYPE_TUNER;
1058 
1059 	i->std = dev->vdev->tvnorms;
1060 
1061 	/* If they are asking about the active input, read signal status */
1062 	if (n == dev->video_input) {
1063 		ret = cx231xx_read_i2c_data(dev, VID_BLK_I2C_ADDRESS,
1064 					    GEN_STAT, 2, &gen_stat, 4);
1065 		if (ret > 0) {
1066 			if ((gen_stat & FLD_VPRES) == 0x00)
1067 				i->status |= V4L2_IN_ST_NO_SIGNAL;
1068 			if ((gen_stat & FLD_HLOCK) == 0x00)
1069 				i->status |= V4L2_IN_ST_NO_H_LOCK;
1070 		}
1071 	}
1072 
1073 	return 0;
1074 }
1075 
1076 int cx231xx_g_input(struct file *file, void *priv, unsigned int *i)
1077 {
1078 	struct cx231xx_fh *fh = priv;
1079 	struct cx231xx *dev = fh->dev;
1080 
1081 	*i = dev->video_input;
1082 
1083 	return 0;
1084 }
1085 
1086 int cx231xx_s_input(struct file *file, void *priv, unsigned int i)
1087 {
1088 	struct cx231xx_fh *fh = priv;
1089 	struct cx231xx *dev = fh->dev;
1090 	int rc;
1091 
1092 	dev->mode_tv = 0;
1093 	rc = check_dev(dev);
1094 	if (rc < 0)
1095 		return rc;
1096 
1097 	if (i >= MAX_CX231XX_INPUT)
1098 		return -EINVAL;
1099 	if (0 == INPUT(i)->type)
1100 		return -EINVAL;
1101 
1102 	video_mux(dev, i);
1103 
1104 	if (INPUT(i)->type == CX231XX_VMUX_TELEVISION ||
1105 	    INPUT(i)->type == CX231XX_VMUX_CABLE) {
1106 		/* There's a tuner, so reset the standard and put it on the
1107 		   last known frequency (since it was probably powered down
1108 		   until now */
1109 		call_all(dev, video, s_std, dev->norm);
1110 	}
1111 
1112 	return 0;
1113 }
1114 
1115 int cx231xx_g_tuner(struct file *file, void *priv, struct v4l2_tuner *t)
1116 {
1117 	struct cx231xx_fh *fh = priv;
1118 	struct cx231xx *dev = fh->dev;
1119 	int rc;
1120 
1121 	rc = check_dev(dev);
1122 	if (rc < 0)
1123 		return rc;
1124 
1125 	if (0 != t->index)
1126 		return -EINVAL;
1127 
1128 	strcpy(t->name, "Tuner");
1129 
1130 	t->type = V4L2_TUNER_ANALOG_TV;
1131 	t->capability = V4L2_TUNER_CAP_NORM;
1132 	t->rangehigh = 0xffffffffUL;
1133 	t->signal = 0xffff;	/* LOCKED */
1134 	call_all(dev, tuner, g_tuner, t);
1135 
1136 	return 0;
1137 }
1138 
1139 int cx231xx_s_tuner(struct file *file, void *priv, const struct v4l2_tuner *t)
1140 {
1141 	struct cx231xx_fh *fh = priv;
1142 	struct cx231xx *dev = fh->dev;
1143 	int rc;
1144 
1145 	rc = check_dev(dev);
1146 	if (rc < 0)
1147 		return rc;
1148 
1149 	if (0 != t->index)
1150 		return -EINVAL;
1151 #if 0
1152 	call_all(dev, tuner, s_tuner, t);
1153 #endif
1154 	return 0;
1155 }
1156 
1157 int cx231xx_g_frequency(struct file *file, void *priv,
1158 			      struct v4l2_frequency *f)
1159 {
1160 	struct cx231xx_fh *fh = priv;
1161 	struct cx231xx *dev = fh->dev;
1162 
1163 	if (f->tuner)
1164 		return -EINVAL;
1165 
1166 	f->frequency = dev->ctl_freq;
1167 
1168 	return 0;
1169 }
1170 
1171 int cx231xx_s_frequency(struct file *file, void *priv,
1172 			      const struct v4l2_frequency *f)
1173 {
1174 	struct cx231xx_fh *fh = priv;
1175 	struct cx231xx *dev = fh->dev;
1176 	struct v4l2_frequency new_freq = *f;
1177 	int rc;
1178 	u32 if_frequency = 5400000;
1179 
1180 	dev_dbg(dev->dev,
1181 		"Enter vidioc_s_frequency()f->frequency=%d;f->type=%d\n",
1182 		f->frequency, f->type);
1183 
1184 	rc = check_dev(dev);
1185 	if (rc < 0)
1186 		return rc;
1187 
1188 	if (0 != f->tuner)
1189 		return -EINVAL;
1190 
1191 	/* set pre channel change settings in DIF first */
1192 	rc = cx231xx_tuner_pre_channel_change(dev);
1193 
1194 	call_all(dev, tuner, s_frequency, f);
1195 	call_all(dev, tuner, g_frequency, &new_freq);
1196 	dev->ctl_freq = new_freq.frequency;
1197 
1198 	/* set post channel change settings in DIF first */
1199 	rc = cx231xx_tuner_post_channel_change(dev);
1200 
1201 	if (dev->tuner_type == TUNER_NXP_TDA18271) {
1202 		if (dev->norm & (V4L2_STD_MN | V4L2_STD_NTSC_443))
1203 			if_frequency = 5400000;  /*5.4MHz	*/
1204 		else if (dev->norm & V4L2_STD_B)
1205 			if_frequency = 6000000;  /*6.0MHz	*/
1206 		else if (dev->norm & (V4L2_STD_PAL_DK | V4L2_STD_SECAM_DK))
1207 			if_frequency = 6900000;  /*6.9MHz	*/
1208 		else if (dev->norm & V4L2_STD_GH)
1209 			if_frequency = 7100000;  /*7.1MHz	*/
1210 		else if (dev->norm & V4L2_STD_PAL_I)
1211 			if_frequency = 7250000;  /*7.25MHz	*/
1212 		else if (dev->norm & V4L2_STD_SECAM_L)
1213 			if_frequency = 6900000;  /*6.9MHz	*/
1214 		else if (dev->norm & V4L2_STD_SECAM_LC)
1215 			if_frequency = 1250000;  /*1.25MHz	*/
1216 
1217 		dev_dbg(dev->dev,
1218 			"if_frequency is set to %d\n", if_frequency);
1219 		cx231xx_set_Colibri_For_LowIF(dev, if_frequency, 1, 1);
1220 
1221 		update_HH_register_after_set_DIF(dev);
1222 	}
1223 
1224 	dev_dbg(dev->dev, "Set New FREQUENCY to %d\n", f->frequency);
1225 
1226 	return rc;
1227 }
1228 
1229 #ifdef CONFIG_VIDEO_ADV_DEBUG
1230 
1231 int cx231xx_g_chip_info(struct file *file, void *fh,
1232 			struct v4l2_dbg_chip_info *chip)
1233 {
1234 	switch (chip->match.addr) {
1235 	case 0:	/* Cx231xx - internal registers */
1236 		return 0;
1237 	case 1:	/* AFE - read byte */
1238 		strlcpy(chip->name, "AFE (byte)", sizeof(chip->name));
1239 		return 0;
1240 	case 2:	/* Video Block - read byte */
1241 		strlcpy(chip->name, "Video (byte)", sizeof(chip->name));
1242 		return 0;
1243 	case 3:	/* I2S block - read byte */
1244 		strlcpy(chip->name, "I2S (byte)", sizeof(chip->name));
1245 		return 0;
1246 	case 4: /* AFE - read dword */
1247 		strlcpy(chip->name, "AFE (dword)", sizeof(chip->name));
1248 		return 0;
1249 	case 5: /* Video Block - read dword */
1250 		strlcpy(chip->name, "Video (dword)", sizeof(chip->name));
1251 		return 0;
1252 	case 6: /* I2S Block - read dword */
1253 		strlcpy(chip->name, "I2S (dword)", sizeof(chip->name));
1254 		return 0;
1255 	}
1256 	return -EINVAL;
1257 }
1258 
1259 int cx231xx_g_register(struct file *file, void *priv,
1260 			     struct v4l2_dbg_register *reg)
1261 {
1262 	struct cx231xx_fh *fh = priv;
1263 	struct cx231xx *dev = fh->dev;
1264 	int ret;
1265 	u8 value[4] = { 0, 0, 0, 0 };
1266 	u32 data = 0;
1267 
1268 	switch (reg->match.addr) {
1269 	case 0:	/* Cx231xx - internal registers */
1270 		ret = cx231xx_read_ctrl_reg(dev, VRT_GET_REGISTER,
1271 				(u16)reg->reg, value, 4);
1272 		reg->val = value[0] | value[1] << 8 |
1273 			value[2] << 16 | value[3] << 24;
1274 		reg->size = 4;
1275 		break;
1276 	case 1:	/* AFE - read byte */
1277 		ret = cx231xx_read_i2c_data(dev, AFE_DEVICE_ADDRESS,
1278 				(u16)reg->reg, 2, &data, 1);
1279 		reg->val = data;
1280 		reg->size = 1;
1281 		break;
1282 	case 2:	/* Video Block - read byte */
1283 		ret = cx231xx_read_i2c_data(dev, VID_BLK_I2C_ADDRESS,
1284 				(u16)reg->reg, 2, &data, 1);
1285 		reg->val = data;
1286 		reg->size = 1;
1287 		break;
1288 	case 3:	/* I2S block - read byte */
1289 		ret = cx231xx_read_i2c_data(dev, I2S_BLK_DEVICE_ADDRESS,
1290 				(u16)reg->reg, 1, &data, 1);
1291 		reg->val = data;
1292 		reg->size = 1;
1293 		break;
1294 	case 4: /* AFE - read dword */
1295 		ret = cx231xx_read_i2c_data(dev, AFE_DEVICE_ADDRESS,
1296 				(u16)reg->reg, 2, &data, 4);
1297 		reg->val = data;
1298 		reg->size = 4;
1299 		break;
1300 	case 5: /* Video Block - read dword */
1301 		ret = cx231xx_read_i2c_data(dev, VID_BLK_I2C_ADDRESS,
1302 				(u16)reg->reg, 2, &data, 4);
1303 		reg->val = data;
1304 		reg->size = 4;
1305 		break;
1306 	case 6: /* I2S Block - read dword */
1307 		ret = cx231xx_read_i2c_data(dev, I2S_BLK_DEVICE_ADDRESS,
1308 				(u16)reg->reg, 1, &data, 4);
1309 		reg->val = data;
1310 		reg->size = 4;
1311 		break;
1312 	default:
1313 		return -EINVAL;
1314 	}
1315 	return ret < 0 ? ret : 0;
1316 }
1317 
1318 int cx231xx_s_register(struct file *file, void *priv,
1319 			     const struct v4l2_dbg_register *reg)
1320 {
1321 	struct cx231xx_fh *fh = priv;
1322 	struct cx231xx *dev = fh->dev;
1323 	int ret;
1324 	u8 data[4] = { 0, 0, 0, 0 };
1325 
1326 	switch (reg->match.addr) {
1327 	case 0:	/* cx231xx internal registers */
1328 		data[0] = (u8) reg->val;
1329 		data[1] = (u8) (reg->val >> 8);
1330 		data[2] = (u8) (reg->val >> 16);
1331 		data[3] = (u8) (reg->val >> 24);
1332 		ret = cx231xx_write_ctrl_reg(dev, VRT_SET_REGISTER,
1333 				(u16)reg->reg, data, 4);
1334 		break;
1335 	case 1:	/* AFE - write byte */
1336 		ret = cx231xx_write_i2c_data(dev, AFE_DEVICE_ADDRESS,
1337 				(u16)reg->reg, 2, reg->val, 1);
1338 		break;
1339 	case 2:	/* Video Block - write byte */
1340 		ret = cx231xx_write_i2c_data(dev, VID_BLK_I2C_ADDRESS,
1341 				(u16)reg->reg, 2, reg->val, 1);
1342 		break;
1343 	case 3:	/* I2S block - write byte */
1344 		ret = cx231xx_write_i2c_data(dev, I2S_BLK_DEVICE_ADDRESS,
1345 				(u16)reg->reg, 1, reg->val, 1);
1346 		break;
1347 	case 4: /* AFE - write dword */
1348 		ret = cx231xx_write_i2c_data(dev, AFE_DEVICE_ADDRESS,
1349 				(u16)reg->reg, 2, reg->val, 4);
1350 		break;
1351 	case 5: /* Video Block - write dword */
1352 		ret = cx231xx_write_i2c_data(dev, VID_BLK_I2C_ADDRESS,
1353 				(u16)reg->reg, 2, reg->val, 4);
1354 		break;
1355 	case 6: /* I2S block - write dword */
1356 		ret = cx231xx_write_i2c_data(dev, I2S_BLK_DEVICE_ADDRESS,
1357 				(u16)reg->reg, 1, reg->val, 4);
1358 		break;
1359 	default:
1360 		return -EINVAL;
1361 	}
1362 	return ret < 0 ? ret : 0;
1363 }
1364 #endif
1365 
1366 static int vidioc_cropcap(struct file *file, void *priv,
1367 			  struct v4l2_cropcap *cc)
1368 {
1369 	struct cx231xx_fh *fh = priv;
1370 	struct cx231xx *dev = fh->dev;
1371 
1372 	if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1373 		return -EINVAL;
1374 
1375 	cc->bounds.left = 0;
1376 	cc->bounds.top = 0;
1377 	cc->bounds.width = dev->width;
1378 	cc->bounds.height = dev->height;
1379 	cc->defrect = cc->bounds;
1380 	cc->pixelaspect.numerator = 54;	/* 4:3 FIXME: remove magic numbers */
1381 	cc->pixelaspect.denominator = 59;
1382 
1383 	return 0;
1384 }
1385 
1386 static int vidioc_streamon(struct file *file, void *priv,
1387 			   enum v4l2_buf_type type)
1388 {
1389 	struct cx231xx_fh *fh = priv;
1390 	struct cx231xx *dev = fh->dev;
1391 	int rc;
1392 
1393 	rc = check_dev(dev);
1394 	if (rc < 0)
1395 		return rc;
1396 
1397 	rc = res_get(fh);
1398 
1399 	if (likely(rc >= 0))
1400 		rc = videobuf_streamon(&fh->vb_vidq);
1401 
1402 	call_all(dev, video, s_stream, 1);
1403 
1404 	return rc;
1405 }
1406 
1407 static int vidioc_streamoff(struct file *file, void *priv,
1408 			    enum v4l2_buf_type type)
1409 {
1410 	struct cx231xx_fh *fh = priv;
1411 	struct cx231xx *dev = fh->dev;
1412 	int rc;
1413 
1414 	rc = check_dev(dev);
1415 	if (rc < 0)
1416 		return rc;
1417 
1418 	if (type != fh->type)
1419 		return -EINVAL;
1420 
1421 	cx25840_call(dev, video, s_stream, 0);
1422 
1423 	videobuf_streamoff(&fh->vb_vidq);
1424 	res_free(fh);
1425 
1426 	return 0;
1427 }
1428 
1429 int cx231xx_querycap(struct file *file, void *priv,
1430 			   struct v4l2_capability *cap)
1431 {
1432 	struct video_device *vdev = video_devdata(file);
1433 	struct cx231xx_fh *fh = priv;
1434 	struct cx231xx *dev = fh->dev;
1435 
1436 	strlcpy(cap->driver, "cx231xx", sizeof(cap->driver));
1437 	strlcpy(cap->card, cx231xx_boards[dev->model].name, sizeof(cap->card));
1438 	usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
1439 
1440 	if (vdev->vfl_type == VFL_TYPE_RADIO)
1441 		cap->device_caps = V4L2_CAP_RADIO;
1442 	else {
1443 		cap->device_caps = V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1444 		if (vdev->vfl_type == VFL_TYPE_VBI)
1445 			cap->device_caps |= V4L2_CAP_VBI_CAPTURE;
1446 		else
1447 			cap->device_caps |= V4L2_CAP_VIDEO_CAPTURE;
1448 	}
1449 	if (dev->tuner_type != TUNER_ABSENT)
1450 		cap->device_caps |= V4L2_CAP_TUNER;
1451 	cap->capabilities = cap->device_caps | V4L2_CAP_READWRITE |
1452 		V4L2_CAP_VBI_CAPTURE | V4L2_CAP_VIDEO_CAPTURE |
1453 		V4L2_CAP_STREAMING | V4L2_CAP_DEVICE_CAPS;
1454 	if (dev->radio_dev)
1455 		cap->capabilities |= V4L2_CAP_RADIO;
1456 
1457 	return 0;
1458 }
1459 
1460 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
1461 				   struct v4l2_fmtdesc *f)
1462 {
1463 	if (unlikely(f->index >= ARRAY_SIZE(format)))
1464 		return -EINVAL;
1465 
1466 	strlcpy(f->description, format[f->index].name, sizeof(f->description));
1467 	f->pixelformat = format[f->index].fourcc;
1468 
1469 	return 0;
1470 }
1471 
1472 /* RAW VBI ioctls */
1473 
1474 static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
1475 				struct v4l2_format *f)
1476 {
1477 	struct cx231xx_fh *fh = priv;
1478 	struct cx231xx *dev = fh->dev;
1479 
1480 	f->fmt.vbi.sampling_rate = 6750000 * 4;
1481 	f->fmt.vbi.samples_per_line = VBI_LINE_LENGTH;
1482 	f->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
1483 	f->fmt.vbi.offset = 0;
1484 	f->fmt.vbi.start[0] = (dev->norm & V4L2_STD_625_50) ?
1485 	    PAL_VBI_START_LINE : NTSC_VBI_START_LINE;
1486 	f->fmt.vbi.count[0] = (dev->norm & V4L2_STD_625_50) ?
1487 	    PAL_VBI_LINES : NTSC_VBI_LINES;
1488 	f->fmt.vbi.start[1] = (dev->norm & V4L2_STD_625_50) ?
1489 	    PAL_VBI_START_LINE + 312 : NTSC_VBI_START_LINE + 263;
1490 	f->fmt.vbi.count[1] = f->fmt.vbi.count[0];
1491 	memset(f->fmt.vbi.reserved, 0, sizeof(f->fmt.vbi.reserved));
1492 
1493 	return 0;
1494 
1495 }
1496 
1497 static int vidioc_try_fmt_vbi_cap(struct file *file, void *priv,
1498 				  struct v4l2_format *f)
1499 {
1500 	struct cx231xx_fh *fh = priv;
1501 	struct cx231xx *dev = fh->dev;
1502 
1503 	f->fmt.vbi.sampling_rate = 6750000 * 4;
1504 	f->fmt.vbi.samples_per_line = VBI_LINE_LENGTH;
1505 	f->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
1506 	f->fmt.vbi.offset = 0;
1507 	f->fmt.vbi.flags = 0;
1508 	f->fmt.vbi.start[0] = (dev->norm & V4L2_STD_625_50) ?
1509 	    PAL_VBI_START_LINE : NTSC_VBI_START_LINE;
1510 	f->fmt.vbi.count[0] = (dev->norm & V4L2_STD_625_50) ?
1511 	    PAL_VBI_LINES : NTSC_VBI_LINES;
1512 	f->fmt.vbi.start[1] = (dev->norm & V4L2_STD_625_50) ?
1513 	    PAL_VBI_START_LINE + 312 : NTSC_VBI_START_LINE + 263;
1514 	f->fmt.vbi.count[1] = f->fmt.vbi.count[0];
1515 	memset(f->fmt.vbi.reserved, 0, sizeof(f->fmt.vbi.reserved));
1516 
1517 	return 0;
1518 
1519 }
1520 
1521 static int vidioc_s_fmt_vbi_cap(struct file *file, void *priv,
1522 				  struct v4l2_format *f)
1523 {
1524 	struct cx231xx_fh *fh = priv;
1525 	struct cx231xx *dev = fh->dev;
1526 
1527 	if (dev->vbi_stream_on && !fh->stream_on) {
1528 		dev_err(dev->dev,
1529 			"%s device in use by another fh\n", __func__);
1530 		return -EBUSY;
1531 	}
1532 	return vidioc_try_fmt_vbi_cap(file, priv, f);
1533 }
1534 
1535 static int vidioc_reqbufs(struct file *file, void *priv,
1536 			  struct v4l2_requestbuffers *rb)
1537 {
1538 	struct cx231xx_fh *fh = priv;
1539 	struct cx231xx *dev = fh->dev;
1540 	int rc;
1541 
1542 	rc = check_dev(dev);
1543 	if (rc < 0)
1544 		return rc;
1545 
1546 	return videobuf_reqbufs(&fh->vb_vidq, rb);
1547 }
1548 
1549 static int vidioc_querybuf(struct file *file, void *priv, struct v4l2_buffer *b)
1550 {
1551 	struct cx231xx_fh *fh = priv;
1552 	struct cx231xx *dev = fh->dev;
1553 	int rc;
1554 
1555 	rc = check_dev(dev);
1556 	if (rc < 0)
1557 		return rc;
1558 
1559 	return videobuf_querybuf(&fh->vb_vidq, b);
1560 }
1561 
1562 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1563 {
1564 	struct cx231xx_fh *fh = priv;
1565 	struct cx231xx *dev = fh->dev;
1566 	int rc;
1567 
1568 	rc = check_dev(dev);
1569 	if (rc < 0)
1570 		return rc;
1571 
1572 	return videobuf_qbuf(&fh->vb_vidq, b);
1573 }
1574 
1575 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1576 {
1577 	struct cx231xx_fh *fh = priv;
1578 	struct cx231xx *dev = fh->dev;
1579 	int rc;
1580 
1581 	rc = check_dev(dev);
1582 	if (rc < 0)
1583 		return rc;
1584 
1585 	return videobuf_dqbuf(&fh->vb_vidq, b, file->f_flags & O_NONBLOCK);
1586 }
1587 
1588 /* ----------------------------------------------------------- */
1589 /* RADIO ESPECIFIC IOCTLS                                      */
1590 /* ----------------------------------------------------------- */
1591 
1592 static int radio_g_tuner(struct file *file, void *priv, struct v4l2_tuner *t)
1593 {
1594 	struct cx231xx *dev = ((struct cx231xx_fh *)priv)->dev;
1595 
1596 	if (t->index)
1597 		return -EINVAL;
1598 
1599 	strcpy(t->name, "Radio");
1600 
1601 	call_all(dev, tuner, g_tuner, t);
1602 
1603 	return 0;
1604 }
1605 static int radio_s_tuner(struct file *file, void *priv, const struct v4l2_tuner *t)
1606 {
1607 	struct cx231xx *dev = ((struct cx231xx_fh *)priv)->dev;
1608 
1609 	if (t->index)
1610 		return -EINVAL;
1611 
1612 	call_all(dev, tuner, s_tuner, t);
1613 
1614 	return 0;
1615 }
1616 
1617 /*
1618  * cx231xx_v4l2_open()
1619  * inits the device and starts isoc transfer
1620  */
1621 static int cx231xx_v4l2_open(struct file *filp)
1622 {
1623 	int radio = 0;
1624 	struct video_device *vdev = video_devdata(filp);
1625 	struct cx231xx *dev = video_drvdata(filp);
1626 	struct cx231xx_fh *fh;
1627 	enum v4l2_buf_type fh_type = 0;
1628 
1629 	switch (vdev->vfl_type) {
1630 	case VFL_TYPE_GRABBER:
1631 		fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1632 		break;
1633 	case VFL_TYPE_VBI:
1634 		fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
1635 		break;
1636 	case VFL_TYPE_RADIO:
1637 		radio = 1;
1638 		break;
1639 	}
1640 
1641 	cx231xx_videodbg("open dev=%s type=%s users=%d\n",
1642 			 video_device_node_name(vdev), v4l2_type_names[fh_type],
1643 			 dev->users);
1644 
1645 #if 0
1646 	errCode = cx231xx_set_mode(dev, CX231XX_ANALOG_MODE);
1647 	if (errCode < 0) {
1648 		dev_err(dev->dev,
1649 			"Device locked on digital mode. Can't open analog\n");
1650 		return -EBUSY;
1651 	}
1652 #endif
1653 
1654 	fh = kzalloc(sizeof(struct cx231xx_fh), GFP_KERNEL);
1655 	if (!fh)
1656 		return -ENOMEM;
1657 	if (mutex_lock_interruptible(&dev->lock)) {
1658 		kfree(fh);
1659 		return -ERESTARTSYS;
1660 	}
1661 	fh->dev = dev;
1662 	fh->type = fh_type;
1663 	filp->private_data = fh;
1664 	v4l2_fh_init(&fh->fh, vdev);
1665 
1666 	if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
1667 		/* Power up in Analog TV mode */
1668 		if (dev->board.external_av)
1669 			cx231xx_set_power_mode(dev,
1670 				 POLARIS_AVMODE_ENXTERNAL_AV);
1671 		else
1672 			cx231xx_set_power_mode(dev, POLARIS_AVMODE_ANALOGT_TV);
1673 
1674 #if 0
1675 		cx231xx_set_mode(dev, CX231XX_ANALOG_MODE);
1676 #endif
1677 
1678 		/* set video alternate setting */
1679 		cx231xx_set_video_alternate(dev);
1680 
1681 		/* Needed, since GPIO might have disabled power of
1682 		   some i2c device */
1683 		cx231xx_config_i2c(dev);
1684 
1685 		/* device needs to be initialized before isoc transfer */
1686 		dev->video_input = dev->video_input > 2 ? 2 : dev->video_input;
1687 
1688 	}
1689 	if (radio) {
1690 		cx231xx_videodbg("video_open: setting radio device\n");
1691 
1692 		/* cx231xx_start_radio(dev); */
1693 
1694 		call_all(dev, tuner, s_radio);
1695 	}
1696 
1697 	dev->users++;
1698 
1699 	if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1700 		videobuf_queue_vmalloc_init(&fh->vb_vidq, &cx231xx_video_qops,
1701 					    NULL, &dev->video_mode.slock,
1702 					    fh->type, V4L2_FIELD_INTERLACED,
1703 					    sizeof(struct cx231xx_buffer),
1704 					    fh, &dev->lock);
1705 	if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
1706 		/* Set the required alternate setting  VBI interface works in
1707 		   Bulk mode only */
1708 		cx231xx_set_alt_setting(dev, INDEX_VANC, 0);
1709 
1710 		videobuf_queue_vmalloc_init(&fh->vb_vidq, &cx231xx_vbi_qops,
1711 					    NULL, &dev->vbi_mode.slock,
1712 					    fh->type, V4L2_FIELD_SEQ_TB,
1713 					    sizeof(struct cx231xx_buffer),
1714 					    fh, &dev->lock);
1715 	}
1716 	mutex_unlock(&dev->lock);
1717 	v4l2_fh_add(&fh->fh);
1718 
1719 	return 0;
1720 }
1721 
1722 /*
1723  * cx231xx_realease_resources()
1724  * unregisters the v4l2,i2c and usb devices
1725  * called when the device gets disconected or at module unload
1726 */
1727 void cx231xx_release_analog_resources(struct cx231xx *dev)
1728 {
1729 
1730 	/*FIXME: I2C IR should be disconnected */
1731 
1732 	if (dev->radio_dev) {
1733 		if (video_is_registered(dev->radio_dev))
1734 			video_unregister_device(dev->radio_dev);
1735 		else
1736 			video_device_release(dev->radio_dev);
1737 		dev->radio_dev = NULL;
1738 	}
1739 	if (dev->vbi_dev) {
1740 		dev_info(dev->dev, "V4L2 device %s deregistered\n",
1741 			video_device_node_name(dev->vbi_dev));
1742 		if (video_is_registered(dev->vbi_dev))
1743 			video_unregister_device(dev->vbi_dev);
1744 		else
1745 			video_device_release(dev->vbi_dev);
1746 		dev->vbi_dev = NULL;
1747 	}
1748 	if (dev->vdev) {
1749 		dev_info(dev->dev, "V4L2 device %s deregistered\n",
1750 			video_device_node_name(dev->vdev));
1751 
1752 		if (dev->board.has_417)
1753 			cx231xx_417_unregister(dev);
1754 
1755 		if (video_is_registered(dev->vdev))
1756 			video_unregister_device(dev->vdev);
1757 		else
1758 			video_device_release(dev->vdev);
1759 		dev->vdev = NULL;
1760 	}
1761 	v4l2_ctrl_handler_free(&dev->ctrl_handler);
1762 	v4l2_ctrl_handler_free(&dev->radio_ctrl_handler);
1763 }
1764 
1765 /*
1766  * cx231xx_close()
1767  * stops streaming and deallocates all resources allocated by the v4l2
1768  * calls and ioctls
1769  */
1770 static int cx231xx_close(struct file *filp)
1771 {
1772 	struct cx231xx_fh *fh = filp->private_data;
1773 	struct cx231xx *dev = fh->dev;
1774 
1775 	cx231xx_videodbg("users=%d\n", dev->users);
1776 
1777 	cx231xx_videodbg("users=%d\n", dev->users);
1778 	if (res_check(fh))
1779 		res_free(fh);
1780 
1781 	/*
1782 	 * To workaround error number=-71 on EP0 for VideoGrabber,
1783 	 *	 need exclude following.
1784 	 * FIXME: It is probably safe to remove most of these, as we're
1785 	 * now avoiding the alternate setting for INDEX_VANC
1786 	 */
1787 	if (!dev->board.no_alt_vanc)
1788 		if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
1789 			videobuf_stop(&fh->vb_vidq);
1790 			videobuf_mmap_free(&fh->vb_vidq);
1791 
1792 			/* the device is already disconnect,
1793 			   free the remaining resources */
1794 			if (dev->state & DEV_DISCONNECTED) {
1795 				if (atomic_read(&dev->devlist_count) > 0) {
1796 					cx231xx_release_resources(dev);
1797 					fh->dev = NULL;
1798 					return 0;
1799 				}
1800 				return 0;
1801 			}
1802 
1803 			/* do this before setting alternate! */
1804 			cx231xx_uninit_vbi_isoc(dev);
1805 
1806 			/* set alternate 0 */
1807 			if (!dev->vbi_or_sliced_cc_mode)
1808 				cx231xx_set_alt_setting(dev, INDEX_VANC, 0);
1809 			else
1810 				cx231xx_set_alt_setting(dev, INDEX_HANC, 0);
1811 
1812 			v4l2_fh_del(&fh->fh);
1813 			v4l2_fh_exit(&fh->fh);
1814 			kfree(fh);
1815 			dev->users--;
1816 			wake_up_interruptible_nr(&dev->open, 1);
1817 			return 0;
1818 		}
1819 
1820 	v4l2_fh_del(&fh->fh);
1821 	dev->users--;
1822 	if (!dev->users) {
1823 		videobuf_stop(&fh->vb_vidq);
1824 		videobuf_mmap_free(&fh->vb_vidq);
1825 
1826 		/* the device is already disconnect,
1827 		   free the remaining resources */
1828 		if (dev->state & DEV_DISCONNECTED) {
1829 			cx231xx_release_resources(dev);
1830 			fh->dev = NULL;
1831 			return 0;
1832 		}
1833 
1834 		/* Save some power by putting tuner to sleep */
1835 		call_all(dev, core, s_power, 0);
1836 
1837 		/* do this before setting alternate! */
1838 		if (dev->USE_ISO)
1839 			cx231xx_uninit_isoc(dev);
1840 		else
1841 			cx231xx_uninit_bulk(dev);
1842 		cx231xx_set_mode(dev, CX231XX_SUSPEND);
1843 
1844 		/* set alternate 0 */
1845 		cx231xx_set_alt_setting(dev, INDEX_VIDEO, 0);
1846 	}
1847 	v4l2_fh_exit(&fh->fh);
1848 	kfree(fh);
1849 	wake_up_interruptible_nr(&dev->open, 1);
1850 	return 0;
1851 }
1852 
1853 static int cx231xx_v4l2_close(struct file *filp)
1854 {
1855 	struct cx231xx_fh *fh = filp->private_data;
1856 	struct cx231xx *dev = fh->dev;
1857 	int rc;
1858 
1859 	mutex_lock(&dev->lock);
1860 	rc = cx231xx_close(filp);
1861 	mutex_unlock(&dev->lock);
1862 	return rc;
1863 }
1864 
1865 /*
1866  * cx231xx_v4l2_read()
1867  * will allocate buffers when called for the first time
1868  */
1869 static ssize_t
1870 cx231xx_v4l2_read(struct file *filp, char __user *buf, size_t count,
1871 		  loff_t *pos)
1872 {
1873 	struct cx231xx_fh *fh = filp->private_data;
1874 	struct cx231xx *dev = fh->dev;
1875 	int rc;
1876 
1877 	rc = check_dev(dev);
1878 	if (rc < 0)
1879 		return rc;
1880 
1881 	if ((fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) ||
1882 	    (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE)) {
1883 		rc = res_get(fh);
1884 
1885 		if (unlikely(rc < 0))
1886 			return rc;
1887 
1888 		if (mutex_lock_interruptible(&dev->lock))
1889 			return -ERESTARTSYS;
1890 		rc = videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0,
1891 					    filp->f_flags & O_NONBLOCK);
1892 		mutex_unlock(&dev->lock);
1893 		return rc;
1894 	}
1895 	return 0;
1896 }
1897 
1898 /*
1899  * cx231xx_v4l2_poll()
1900  * will allocate buffers when called for the first time
1901  */
1902 static unsigned int cx231xx_v4l2_poll(struct file *filp, poll_table *wait)
1903 {
1904 	unsigned long req_events = poll_requested_events(wait);
1905 	struct cx231xx_fh *fh = filp->private_data;
1906 	struct cx231xx *dev = fh->dev;
1907 	unsigned res = 0;
1908 	int rc;
1909 
1910 	rc = check_dev(dev);
1911 	if (rc < 0)
1912 		return POLLERR;
1913 
1914 	rc = res_get(fh);
1915 
1916 	if (unlikely(rc < 0))
1917 		return POLLERR;
1918 
1919 	if (v4l2_event_pending(&fh->fh))
1920 		res |= POLLPRI;
1921 	else
1922 		poll_wait(filp, &fh->fh.wait, wait);
1923 
1924 	if (!(req_events & (POLLIN | POLLRDNORM)))
1925 		return res;
1926 
1927 	if ((V4L2_BUF_TYPE_VIDEO_CAPTURE == fh->type) ||
1928 	    (V4L2_BUF_TYPE_VBI_CAPTURE == fh->type)) {
1929 		mutex_lock(&dev->lock);
1930 		res |= videobuf_poll_stream(filp, &fh->vb_vidq, wait);
1931 		mutex_unlock(&dev->lock);
1932 		return res;
1933 	}
1934 	return res | POLLERR;
1935 }
1936 
1937 /*
1938  * cx231xx_v4l2_mmap()
1939  */
1940 static int cx231xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
1941 {
1942 	struct cx231xx_fh *fh = filp->private_data;
1943 	struct cx231xx *dev = fh->dev;
1944 	int rc;
1945 
1946 	rc = check_dev(dev);
1947 	if (rc < 0)
1948 		return rc;
1949 
1950 	rc = res_get(fh);
1951 
1952 	if (unlikely(rc < 0))
1953 		return rc;
1954 
1955 	if (mutex_lock_interruptible(&dev->lock))
1956 		return -ERESTARTSYS;
1957 	rc = videobuf_mmap_mapper(&fh->vb_vidq, vma);
1958 	mutex_unlock(&dev->lock);
1959 
1960 	cx231xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n",
1961 			 (unsigned long)vma->vm_start,
1962 			 (unsigned long)vma->vm_end -
1963 			 (unsigned long)vma->vm_start, rc);
1964 
1965 	return rc;
1966 }
1967 
1968 static const struct v4l2_file_operations cx231xx_v4l_fops = {
1969 	.owner   = THIS_MODULE,
1970 	.open    = cx231xx_v4l2_open,
1971 	.release = cx231xx_v4l2_close,
1972 	.read    = cx231xx_v4l2_read,
1973 	.poll    = cx231xx_v4l2_poll,
1974 	.mmap    = cx231xx_v4l2_mmap,
1975 	.unlocked_ioctl   = video_ioctl2,
1976 };
1977 
1978 static const struct v4l2_ioctl_ops video_ioctl_ops = {
1979 	.vidioc_querycap               = cx231xx_querycap,
1980 	.vidioc_enum_fmt_vid_cap       = vidioc_enum_fmt_vid_cap,
1981 	.vidioc_g_fmt_vid_cap          = vidioc_g_fmt_vid_cap,
1982 	.vidioc_try_fmt_vid_cap        = vidioc_try_fmt_vid_cap,
1983 	.vidioc_s_fmt_vid_cap          = vidioc_s_fmt_vid_cap,
1984 	.vidioc_g_fmt_vbi_cap          = vidioc_g_fmt_vbi_cap,
1985 	.vidioc_try_fmt_vbi_cap        = vidioc_try_fmt_vbi_cap,
1986 	.vidioc_s_fmt_vbi_cap          = vidioc_s_fmt_vbi_cap,
1987 	.vidioc_cropcap                = vidioc_cropcap,
1988 	.vidioc_reqbufs                = vidioc_reqbufs,
1989 	.vidioc_querybuf               = vidioc_querybuf,
1990 	.vidioc_qbuf                   = vidioc_qbuf,
1991 	.vidioc_dqbuf                  = vidioc_dqbuf,
1992 	.vidioc_s_std                  = vidioc_s_std,
1993 	.vidioc_g_std                  = vidioc_g_std,
1994 	.vidioc_enum_input             = cx231xx_enum_input,
1995 	.vidioc_g_input                = cx231xx_g_input,
1996 	.vidioc_s_input                = cx231xx_s_input,
1997 	.vidioc_streamon               = vidioc_streamon,
1998 	.vidioc_streamoff              = vidioc_streamoff,
1999 	.vidioc_g_tuner                = cx231xx_g_tuner,
2000 	.vidioc_s_tuner                = cx231xx_s_tuner,
2001 	.vidioc_g_frequency            = cx231xx_g_frequency,
2002 	.vidioc_s_frequency            = cx231xx_s_frequency,
2003 #ifdef CONFIG_VIDEO_ADV_DEBUG
2004 	.vidioc_g_chip_info            = cx231xx_g_chip_info,
2005 	.vidioc_g_register             = cx231xx_g_register,
2006 	.vidioc_s_register             = cx231xx_s_register,
2007 #endif
2008 	.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
2009 	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
2010 };
2011 
2012 static struct video_device cx231xx_vbi_template;
2013 
2014 static const struct video_device cx231xx_video_template = {
2015 	.fops         = &cx231xx_v4l_fops,
2016 	.release      = video_device_release,
2017 	.ioctl_ops    = &video_ioctl_ops,
2018 	.tvnorms      = V4L2_STD_ALL,
2019 };
2020 
2021 static const struct v4l2_file_operations radio_fops = {
2022 	.owner   = THIS_MODULE,
2023 	.open   = cx231xx_v4l2_open,
2024 	.release = cx231xx_v4l2_close,
2025 	.poll = v4l2_ctrl_poll,
2026 	.unlocked_ioctl = video_ioctl2,
2027 };
2028 
2029 static const struct v4l2_ioctl_ops radio_ioctl_ops = {
2030 	.vidioc_querycap    = cx231xx_querycap,
2031 	.vidioc_g_tuner     = radio_g_tuner,
2032 	.vidioc_s_tuner     = radio_s_tuner,
2033 	.vidioc_g_frequency = cx231xx_g_frequency,
2034 	.vidioc_s_frequency = cx231xx_s_frequency,
2035 #ifdef CONFIG_VIDEO_ADV_DEBUG
2036 	.vidioc_g_chip_info = cx231xx_g_chip_info,
2037 	.vidioc_g_register  = cx231xx_g_register,
2038 	.vidioc_s_register  = cx231xx_s_register,
2039 #endif
2040 	.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
2041 	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
2042 };
2043 
2044 static struct video_device cx231xx_radio_template = {
2045 	.name      = "cx231xx-radio",
2046 	.fops      = &radio_fops,
2047 	.ioctl_ops = &radio_ioctl_ops,
2048 };
2049 
2050 /******************************** usb interface ******************************/
2051 
2052 static struct video_device *cx231xx_vdev_init(struct cx231xx *dev,
2053 		const struct video_device
2054 		*template, const char *type_name)
2055 {
2056 	struct video_device *vfd;
2057 
2058 	vfd = video_device_alloc();
2059 	if (NULL == vfd)
2060 		return NULL;
2061 
2062 	*vfd = *template;
2063 	vfd->v4l2_dev = &dev->v4l2_dev;
2064 	vfd->release = video_device_release;
2065 	vfd->debug = video_debug;
2066 	vfd->lock = &dev->lock;
2067 
2068 	snprintf(vfd->name, sizeof(vfd->name), "%s %s", dev->name, type_name);
2069 
2070 	video_set_drvdata(vfd, dev);
2071 	if (dev->tuner_type == TUNER_ABSENT) {
2072 		v4l2_disable_ioctl(vfd, VIDIOC_G_FREQUENCY);
2073 		v4l2_disable_ioctl(vfd, VIDIOC_S_FREQUENCY);
2074 		v4l2_disable_ioctl(vfd, VIDIOC_G_TUNER);
2075 		v4l2_disable_ioctl(vfd, VIDIOC_S_TUNER);
2076 	}
2077 	return vfd;
2078 }
2079 
2080 int cx231xx_register_analog_devices(struct cx231xx *dev)
2081 {
2082 	int ret;
2083 
2084 	dev_info(dev->dev, "v4l2 driver version %s\n", 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 		dev_err(dev->dev, "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 		dev_err(dev->dev,
2132 			"unable to register video device (error=%i).\n",
2133 			ret);
2134 		return ret;
2135 	}
2136 
2137 	dev_info(dev->dev, "Registered video device %s [v4l2]\n",
2138 		video_device_node_name(dev->vdev));
2139 
2140 	/* Initialize VBI template */
2141 	cx231xx_vbi_template = cx231xx_video_template;
2142 	strcpy(cx231xx_vbi_template.name, "cx231xx-vbi");
2143 
2144 	/* Allocate and fill vbi video_device struct */
2145 	dev->vbi_dev = cx231xx_vdev_init(dev, &cx231xx_vbi_template, "vbi");
2146 
2147 	if (!dev->vbi_dev) {
2148 		dev_err(dev->dev, "cannot allocate video_device.\n");
2149 		return -ENODEV;
2150 	}
2151 	dev->vbi_dev->ctrl_handler = &dev->ctrl_handler;
2152 	/* register v4l2 vbi video_device */
2153 	ret = video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
2154 				    vbi_nr[dev->devno]);
2155 	if (ret < 0) {
2156 		dev_err(dev->dev, "unable to register vbi device\n");
2157 		return ret;
2158 	}
2159 
2160 	dev_info(dev->dev, "Registered VBI device %s\n",
2161 		video_device_node_name(dev->vbi_dev));
2162 
2163 	if (cx231xx_boards[dev->model].radio.type == CX231XX_RADIO) {
2164 		dev->radio_dev = cx231xx_vdev_init(dev, &cx231xx_radio_template,
2165 						   "radio");
2166 		if (!dev->radio_dev) {
2167 			dev_err(dev->dev,
2168 				"cannot allocate video_device.\n");
2169 			return -ENODEV;
2170 		}
2171 		dev->radio_dev->ctrl_handler = &dev->radio_ctrl_handler;
2172 		ret = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
2173 					    radio_nr[dev->devno]);
2174 		if (ret < 0) {
2175 			dev_err(dev->dev,
2176 				"can't register radio device\n");
2177 			return ret;
2178 		}
2179 		dev_info(dev->dev, "Registered radio device as %s\n",
2180 			video_device_node_name(dev->radio_dev));
2181 	}
2182 
2183 	return 0;
2184 }
2185