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[mirror_ubuntu-artful-kernel.git] / drivers / media / usb / usbvision / usbvision-core.c
1 /*
2 * usbvision-core.c - driver for NT100x USB video capture devices
3 *
4 *
5 * Copyright (c) 1999-2005 Joerg Heckenbach <joerg@heckenbach-aw.de>
6 * Dwaine Garden <dwainegarden@rogers.com>
7 *
8 * This module is part of usbvision driver project.
9 * Updates to driver completed by Dwaine P. Garden
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 */
25
26 #include <linux/kernel.h>
27 #include <linux/list.h>
28 #include <linux/timer.h>
29 #include <linux/gfp.h>
30 #include <linux/mm.h>
31 #include <linux/highmem.h>
32 #include <linux/vmalloc.h>
33 #include <linux/module.h>
34 #include <linux/init.h>
35 #include <linux/spinlock.h>
36 #include <linux/io.h>
37 #include <linux/videodev2.h>
38 #include <linux/i2c.h>
39
40 #include <media/i2c/saa7115.h>
41 #include <media/v4l2-common.h>
42 #include <media/tuner.h>
43
44 #include <linux/workqueue.h>
45
46 #include "usbvision.h"
47
48 static unsigned int core_debug;
49 module_param(core_debug, int, 0644);
50 MODULE_PARM_DESC(core_debug, "enable debug messages [core]");
51
52 static int adjust_compression = 1; /* Set the compression to be adaptive */
53 module_param(adjust_compression, int, 0444);
54 MODULE_PARM_DESC(adjust_compression, " Set the ADPCM compression for the device. Default: 1 (On)");
55
56 /* To help people with Black and White output with using s-video input.
57 * Some cables and input device are wired differently. */
58 static int switch_svideo_input;
59 module_param(switch_svideo_input, int, 0444);
60 MODULE_PARM_DESC(switch_svideo_input, " Set the S-Video input. Some cables and input device are wired differently. Default: 0 (Off)");
61
62 static unsigned int adjust_x_offset = -1;
63 module_param(adjust_x_offset, int, 0644);
64 MODULE_PARM_DESC(adjust_x_offset, "adjust X offset display [core]");
65
66 static unsigned int adjust_y_offset = -1;
67 module_param(adjust_y_offset, int, 0644);
68 MODULE_PARM_DESC(adjust_y_offset, "adjust Y offset display [core]");
69
70
71 #define ENABLE_HEXDUMP 0 /* Enable if you need it */
72
73
74 #ifdef USBVISION_DEBUG
75 #define PDEBUG(level, fmt, args...) { \
76 if (core_debug & (level)) \
77 printk(KERN_INFO KBUILD_MODNAME ":[%s:%d] " fmt, \
78 __func__, __LINE__ , ## args); \
79 }
80 #else
81 #define PDEBUG(level, fmt, args...) do {} while (0)
82 #endif
83
84 #define DBG_HEADER (1 << 0)
85 #define DBG_IRQ (1 << 1)
86 #define DBG_ISOC (1 << 2)
87 #define DBG_PARSE (1 << 3)
88 #define DBG_SCRATCH (1 << 4)
89 #define DBG_FUNC (1 << 5)
90
91 /* The value of 'scratch_buf_size' affects quality of the picture
92 * in many ways. Shorter buffers may cause loss of data when client
93 * is too slow. Larger buffers are memory-consuming and take longer
94 * to work with. This setting can be adjusted, but the default value
95 * should be OK for most desktop users.
96 */
97 #define DEFAULT_SCRATCH_BUF_SIZE (0x20000) /* 128kB memory scratch buffer */
98 static const int scratch_buf_size = DEFAULT_SCRATCH_BUF_SIZE;
99
100 /* Function prototypes */
101 static int usbvision_request_intra(struct usb_usbvision *usbvision);
102 static int usbvision_unrequest_intra(struct usb_usbvision *usbvision);
103 static int usbvision_adjust_compression(struct usb_usbvision *usbvision);
104 static int usbvision_measure_bandwidth(struct usb_usbvision *usbvision);
105
106 /*******************************/
107 /* Memory management functions */
108 /*******************************/
109
110 /*
111 * Here we want the physical address of the memory.
112 * This is used when initializing the contents of the area.
113 */
114
115 static void *usbvision_rvmalloc(unsigned long size)
116 {
117 void *mem;
118 unsigned long adr;
119
120 size = PAGE_ALIGN(size);
121 mem = vmalloc_32(size);
122 if (!mem)
123 return NULL;
124
125 memset(mem, 0, size); /* Clear the ram out, no junk to the user */
126 adr = (unsigned long) mem;
127 while (size > 0) {
128 SetPageReserved(vmalloc_to_page((void *)adr));
129 adr += PAGE_SIZE;
130 size -= PAGE_SIZE;
131 }
132
133 return mem;
134 }
135
136 static void usbvision_rvfree(void *mem, unsigned long size)
137 {
138 unsigned long adr;
139
140 if (!mem)
141 return;
142
143 size = PAGE_ALIGN(size);
144
145 adr = (unsigned long) mem;
146 while ((long) size > 0) {
147 ClearPageReserved(vmalloc_to_page((void *)adr));
148 adr += PAGE_SIZE;
149 size -= PAGE_SIZE;
150 }
151
152 vfree(mem);
153 }
154
155
156 #if ENABLE_HEXDUMP
157 static void usbvision_hexdump(const unsigned char *data, int len)
158 {
159 char tmp[80];
160 int i, k;
161
162 for (i = k = 0; len > 0; i++, len--) {
163 if (i > 0 && (i % 16 == 0)) {
164 printk("%s\n", tmp);
165 k = 0;
166 }
167 k += sprintf(&tmp[k], "%02x ", data[i]);
168 }
169 if (k > 0)
170 printk(KERN_CONT "%s\n", tmp);
171 }
172 #endif
173
174 /********************************
175 * scratch ring buffer handling
176 ********************************/
177 static int scratch_len(struct usb_usbvision *usbvision) /* This returns the amount of data actually in the buffer */
178 {
179 int len = usbvision->scratch_write_ptr - usbvision->scratch_read_ptr;
180
181 if (len < 0)
182 len += scratch_buf_size;
183 PDEBUG(DBG_SCRATCH, "scratch_len() = %d\n", len);
184
185 return len;
186 }
187
188
189 /* This returns the free space left in the buffer */
190 static int scratch_free(struct usb_usbvision *usbvision)
191 {
192 int free = usbvision->scratch_read_ptr - usbvision->scratch_write_ptr;
193 if (free <= 0)
194 free += scratch_buf_size;
195 if (free) {
196 free -= 1; /* at least one byte in the buffer must */
197 /* left blank, otherwise there is no chance to differ between full and empty */
198 }
199 PDEBUG(DBG_SCRATCH, "return %d\n", free);
200
201 return free;
202 }
203
204
205 /* This puts data into the buffer */
206 static int scratch_put(struct usb_usbvision *usbvision, unsigned char *data,
207 int len)
208 {
209 int len_part;
210
211 if (usbvision->scratch_write_ptr + len < scratch_buf_size) {
212 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len);
213 usbvision->scratch_write_ptr += len;
214 } else {
215 len_part = scratch_buf_size - usbvision->scratch_write_ptr;
216 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len_part);
217 if (len == len_part) {
218 usbvision->scratch_write_ptr = 0; /* just set write_ptr to zero */
219 } else {
220 memcpy(usbvision->scratch, data + len_part, len - len_part);
221 usbvision->scratch_write_ptr = len - len_part;
222 }
223 }
224
225 PDEBUG(DBG_SCRATCH, "len=%d, new write_ptr=%d\n", len, usbvision->scratch_write_ptr);
226
227 return len;
228 }
229
230 /* This marks the write_ptr as position of new frame header */
231 static void scratch_mark_header(struct usb_usbvision *usbvision)
232 {
233 PDEBUG(DBG_SCRATCH, "header at write_ptr=%d\n", usbvision->scratch_headermarker_write_ptr);
234
235 usbvision->scratch_headermarker[usbvision->scratch_headermarker_write_ptr] =
236 usbvision->scratch_write_ptr;
237 usbvision->scratch_headermarker_write_ptr += 1;
238 usbvision->scratch_headermarker_write_ptr %= USBVISION_NUM_HEADERMARKER;
239 }
240
241 /* This gets data from the buffer at the given "ptr" position */
242 static int scratch_get_extra(struct usb_usbvision *usbvision,
243 unsigned char *data, int *ptr, int len)
244 {
245 int len_part;
246
247 if (*ptr + len < scratch_buf_size) {
248 memcpy(data, usbvision->scratch + *ptr, len);
249 *ptr += len;
250 } else {
251 len_part = scratch_buf_size - *ptr;
252 memcpy(data, usbvision->scratch + *ptr, len_part);
253 if (len == len_part) {
254 *ptr = 0; /* just set the y_ptr to zero */
255 } else {
256 memcpy(data + len_part, usbvision->scratch, len - len_part);
257 *ptr = len - len_part;
258 }
259 }
260
261 PDEBUG(DBG_SCRATCH, "len=%d, new ptr=%d\n", len, *ptr);
262
263 return len;
264 }
265
266
267 /* This sets the scratch extra read pointer */
268 static void scratch_set_extra_ptr(struct usb_usbvision *usbvision, int *ptr,
269 int len)
270 {
271 *ptr = (usbvision->scratch_read_ptr + len) % scratch_buf_size;
272
273 PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
274 }
275
276
277 /* This increments the scratch extra read pointer */
278 static void scratch_inc_extra_ptr(int *ptr, int len)
279 {
280 *ptr = (*ptr + len) % scratch_buf_size;
281
282 PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
283 }
284
285
286 /* This gets data from the buffer */
287 static int scratch_get(struct usb_usbvision *usbvision, unsigned char *data,
288 int len)
289 {
290 int len_part;
291
292 if (usbvision->scratch_read_ptr + len < scratch_buf_size) {
293 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len);
294 usbvision->scratch_read_ptr += len;
295 } else {
296 len_part = scratch_buf_size - usbvision->scratch_read_ptr;
297 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len_part);
298 if (len == len_part) {
299 usbvision->scratch_read_ptr = 0; /* just set the read_ptr to zero */
300 } else {
301 memcpy(data + len_part, usbvision->scratch, len - len_part);
302 usbvision->scratch_read_ptr = len - len_part;
303 }
304 }
305
306 PDEBUG(DBG_SCRATCH, "len=%d, new read_ptr=%d\n", len, usbvision->scratch_read_ptr);
307
308 return len;
309 }
310
311
312 /* This sets read pointer to next header and returns it */
313 static int scratch_get_header(struct usb_usbvision *usbvision,
314 struct usbvision_frame_header *header)
315 {
316 int err_code = 0;
317
318 PDEBUG(DBG_SCRATCH, "from read_ptr=%d", usbvision->scratch_headermarker_read_ptr);
319
320 while (usbvision->scratch_headermarker_write_ptr -
321 usbvision->scratch_headermarker_read_ptr != 0) {
322 usbvision->scratch_read_ptr =
323 usbvision->scratch_headermarker[usbvision->scratch_headermarker_read_ptr];
324 usbvision->scratch_headermarker_read_ptr += 1;
325 usbvision->scratch_headermarker_read_ptr %= USBVISION_NUM_HEADERMARKER;
326 scratch_get(usbvision, (unsigned char *)header, USBVISION_HEADER_LENGTH);
327 if ((header->magic_1 == USBVISION_MAGIC_1)
328 && (header->magic_2 == USBVISION_MAGIC_2)
329 && (header->header_length == USBVISION_HEADER_LENGTH)) {
330 err_code = USBVISION_HEADER_LENGTH;
331 header->frame_width = header->frame_width_lo + (header->frame_width_hi << 8);
332 header->frame_height = header->frame_height_lo + (header->frame_height_hi << 8);
333 break;
334 }
335 }
336
337 return err_code;
338 }
339
340
341 /* This removes len bytes of old data from the buffer */
342 static void scratch_rm_old(struct usb_usbvision *usbvision, int len)
343 {
344 usbvision->scratch_read_ptr += len;
345 usbvision->scratch_read_ptr %= scratch_buf_size;
346 PDEBUG(DBG_SCRATCH, "read_ptr is now %d\n", usbvision->scratch_read_ptr);
347 }
348
349
350 /* This resets the buffer - kills all data in it too */
351 static void scratch_reset(struct usb_usbvision *usbvision)
352 {
353 PDEBUG(DBG_SCRATCH, "\n");
354
355 usbvision->scratch_read_ptr = 0;
356 usbvision->scratch_write_ptr = 0;
357 usbvision->scratch_headermarker_read_ptr = 0;
358 usbvision->scratch_headermarker_write_ptr = 0;
359 usbvision->isocstate = isoc_state_no_frame;
360 }
361
362 int usbvision_scratch_alloc(struct usb_usbvision *usbvision)
363 {
364 usbvision->scratch = vmalloc_32(scratch_buf_size);
365 scratch_reset(usbvision);
366 if (usbvision->scratch == NULL) {
367 dev_err(&usbvision->dev->dev,
368 "%s: unable to allocate %d bytes for scratch\n",
369 __func__, scratch_buf_size);
370 return -ENOMEM;
371 }
372 return 0;
373 }
374
375 void usbvision_scratch_free(struct usb_usbvision *usbvision)
376 {
377 vfree(usbvision->scratch);
378 usbvision->scratch = NULL;
379 }
380
381 /*
382 * usbvision_decompress_alloc()
383 *
384 * allocates intermediate buffer for decompression
385 */
386 int usbvision_decompress_alloc(struct usb_usbvision *usbvision)
387 {
388 int IFB_size = MAX_FRAME_WIDTH * MAX_FRAME_HEIGHT * 3 / 2;
389
390 usbvision->intra_frame_buffer = vmalloc_32(IFB_size);
391 if (usbvision->intra_frame_buffer == NULL) {
392 dev_err(&usbvision->dev->dev,
393 "%s: unable to allocate %d for compr. frame buffer\n",
394 __func__, IFB_size);
395 return -ENOMEM;
396 }
397 return 0;
398 }
399
400 /*
401 * usbvision_decompress_free()
402 *
403 * frees intermediate buffer for decompression
404 */
405 void usbvision_decompress_free(struct usb_usbvision *usbvision)
406 {
407 vfree(usbvision->intra_frame_buffer);
408 usbvision->intra_frame_buffer = NULL;
409
410 }
411
412 /************************************************************
413 * Here comes the data parsing stuff that is run as interrupt
414 ************************************************************/
415 /*
416 * usbvision_find_header()
417 *
418 * Locate one of supported header markers in the scratch buffer.
419 */
420 static enum parse_state usbvision_find_header(struct usb_usbvision *usbvision)
421 {
422 struct usbvision_frame *frame;
423 int found_header = 0;
424
425 frame = usbvision->cur_frame;
426
427 while (scratch_get_header(usbvision, &frame->isoc_header) == USBVISION_HEADER_LENGTH) {
428 /* found header in scratch */
429 PDEBUG(DBG_HEADER, "found header: 0x%02x%02x %d %d %d %d %#x 0x%02x %u %u",
430 frame->isoc_header.magic_2,
431 frame->isoc_header.magic_1,
432 frame->isoc_header.header_length,
433 frame->isoc_header.frame_num,
434 frame->isoc_header.frame_phase,
435 frame->isoc_header.frame_latency,
436 frame->isoc_header.data_format,
437 frame->isoc_header.format_param,
438 frame->isoc_header.frame_width,
439 frame->isoc_header.frame_height);
440
441 if (usbvision->request_intra) {
442 if (frame->isoc_header.format_param & 0x80) {
443 found_header = 1;
444 usbvision->last_isoc_frame_num = -1; /* do not check for lost frames this time */
445 usbvision_unrequest_intra(usbvision);
446 break;
447 }
448 } else {
449 found_header = 1;
450 break;
451 }
452 }
453
454 if (found_header) {
455 frame->frmwidth = frame->isoc_header.frame_width * usbvision->stretch_width;
456 frame->frmheight = frame->isoc_header.frame_height * usbvision->stretch_height;
457 frame->v4l2_linesize = (frame->frmwidth * frame->v4l2_format.depth) >> 3;
458 } else { /* no header found */
459 PDEBUG(DBG_HEADER, "skipping scratch data, no header");
460 scratch_reset(usbvision);
461 return parse_state_end_parse;
462 }
463
464 /* found header */
465 if (frame->isoc_header.data_format == ISOC_MODE_COMPRESS) {
466 /* check isoc_header.frame_num for lost frames */
467 if (usbvision->last_isoc_frame_num >= 0) {
468 if (((usbvision->last_isoc_frame_num + 1) % 32) != frame->isoc_header.frame_num) {
469 /* unexpected frame drop: need to request new intra frame */
470 PDEBUG(DBG_HEADER, "Lost frame before %d on USB", frame->isoc_header.frame_num);
471 usbvision_request_intra(usbvision);
472 return parse_state_next_frame;
473 }
474 }
475 usbvision->last_isoc_frame_num = frame->isoc_header.frame_num;
476 }
477 usbvision->header_count++;
478 frame->scanstate = scan_state_lines;
479 frame->curline = 0;
480
481 return parse_state_continue;
482 }
483
484 static enum parse_state usbvision_parse_lines_422(struct usb_usbvision *usbvision,
485 long *pcopylen)
486 {
487 volatile struct usbvision_frame *frame;
488 unsigned char *f;
489 int len;
490 int i;
491 unsigned char yuyv[4] = { 180, 128, 10, 128 }; /* YUV components */
492 unsigned char rv, gv, bv; /* RGB components */
493 int clipmask_index, bytes_per_pixel;
494 int stretch_bytes, clipmask_add;
495
496 frame = usbvision->cur_frame;
497 f = frame->data + (frame->v4l2_linesize * frame->curline);
498
499 /* Make sure there's enough data for the entire line */
500 len = (frame->isoc_header.frame_width * 2) + 5;
501 if (scratch_len(usbvision) < len) {
502 PDEBUG(DBG_PARSE, "out of data in line %d, need %u.\n", frame->curline, len);
503 return parse_state_out;
504 }
505
506 if ((frame->curline + 1) >= frame->frmheight)
507 return parse_state_next_frame;
508
509 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
510 stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
511 clipmask_index = frame->curline * MAX_FRAME_WIDTH;
512 clipmask_add = usbvision->stretch_width;
513
514 for (i = 0; i < frame->frmwidth; i += (2 * usbvision->stretch_width)) {
515 scratch_get(usbvision, &yuyv[0], 4);
516
517 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
518 *f++ = yuyv[0]; /* Y */
519 *f++ = yuyv[3]; /* U */
520 } else {
521 YUV_TO_RGB_BY_THE_BOOK(yuyv[0], yuyv[1], yuyv[3], rv, gv, bv);
522 switch (frame->v4l2_format.format) {
523 case V4L2_PIX_FMT_RGB565:
524 *f++ = (0x1F & rv) |
525 (0xE0 & (gv << 5));
526 *f++ = (0x07 & (gv >> 3)) |
527 (0xF8 & bv);
528 break;
529 case V4L2_PIX_FMT_RGB24:
530 *f++ = rv;
531 *f++ = gv;
532 *f++ = bv;
533 break;
534 case V4L2_PIX_FMT_RGB32:
535 *f++ = rv;
536 *f++ = gv;
537 *f++ = bv;
538 f++;
539 break;
540 case V4L2_PIX_FMT_RGB555:
541 *f++ = (0x1F & rv) |
542 (0xE0 & (gv << 5));
543 *f++ = (0x03 & (gv >> 3)) |
544 (0x7C & (bv << 2));
545 break;
546 }
547 }
548 clipmask_index += clipmask_add;
549 f += stretch_bytes;
550
551 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
552 *f++ = yuyv[2]; /* Y */
553 *f++ = yuyv[1]; /* V */
554 } else {
555 YUV_TO_RGB_BY_THE_BOOK(yuyv[2], yuyv[1], yuyv[3], rv, gv, bv);
556 switch (frame->v4l2_format.format) {
557 case V4L2_PIX_FMT_RGB565:
558 *f++ = (0x1F & rv) |
559 (0xE0 & (gv << 5));
560 *f++ = (0x07 & (gv >> 3)) |
561 (0xF8 & bv);
562 break;
563 case V4L2_PIX_FMT_RGB24:
564 *f++ = rv;
565 *f++ = gv;
566 *f++ = bv;
567 break;
568 case V4L2_PIX_FMT_RGB32:
569 *f++ = rv;
570 *f++ = gv;
571 *f++ = bv;
572 f++;
573 break;
574 case V4L2_PIX_FMT_RGB555:
575 *f++ = (0x1F & rv) |
576 (0xE0 & (gv << 5));
577 *f++ = (0x03 & (gv >> 3)) |
578 (0x7C & (bv << 2));
579 break;
580 }
581 }
582 clipmask_index += clipmask_add;
583 f += stretch_bytes;
584 }
585
586 frame->curline += usbvision->stretch_height;
587 *pcopylen += frame->v4l2_linesize * usbvision->stretch_height;
588
589 if (frame->curline >= frame->frmheight)
590 return parse_state_next_frame;
591 return parse_state_continue;
592 }
593
594 /* The decompression routine */
595 static int usbvision_decompress(struct usb_usbvision *usbvision, unsigned char *compressed,
596 unsigned char *decompressed, int *start_pos,
597 int *block_typestart_pos, int len)
598 {
599 int rest_pixel, idx, pos, extra_pos, block_len, block_type_pos, block_type_len;
600 unsigned char block_byte, block_code, block_type, block_type_byte, integrator;
601
602 integrator = 0;
603 pos = *start_pos;
604 block_type_pos = *block_typestart_pos;
605 extra_pos = pos;
606 block_len = 0;
607 block_byte = 0;
608 block_code = 0;
609 block_type = 0;
610 block_type_byte = 0;
611 block_type_len = 0;
612 rest_pixel = len;
613
614 for (idx = 0; idx < len; idx++) {
615 if (block_len == 0) {
616 if (block_type_len == 0) {
617 block_type_byte = compressed[block_type_pos];
618 block_type_pos++;
619 block_type_len = 4;
620 }
621 block_type = (block_type_byte & 0xC0) >> 6;
622
623 /* statistic: */
624 usbvision->compr_block_types[block_type]++;
625
626 pos = extra_pos;
627 if (block_type == 0) {
628 if (rest_pixel >= 24) {
629 idx += 23;
630 rest_pixel -= 24;
631 integrator = decompressed[idx];
632 } else {
633 idx += rest_pixel - 1;
634 rest_pixel = 0;
635 }
636 } else {
637 block_code = compressed[pos];
638 pos++;
639 if (rest_pixel >= 24)
640 block_len = 24;
641 else
642 block_len = rest_pixel;
643 rest_pixel -= block_len;
644 extra_pos = pos + (block_len / 4);
645 }
646 block_type_byte <<= 2;
647 block_type_len -= 1;
648 }
649 if (block_len > 0) {
650 if ((block_len % 4) == 0) {
651 block_byte = compressed[pos];
652 pos++;
653 }
654 if (block_type == 1) /* inter Block */
655 integrator = decompressed[idx];
656 switch (block_byte & 0xC0) {
657 case 0x03 << 6:
658 integrator += compressed[extra_pos];
659 extra_pos++;
660 break;
661 case 0x02 << 6:
662 integrator += block_code;
663 break;
664 case 0x00:
665 integrator -= block_code;
666 break;
667 }
668 decompressed[idx] = integrator;
669 block_byte <<= 2;
670 block_len -= 1;
671 }
672 }
673 *start_pos = extra_pos;
674 *block_typestart_pos = block_type_pos;
675 return idx;
676 }
677
678
679 /*
680 * usbvision_parse_compress()
681 *
682 * Parse compressed frame from the scratch buffer, put
683 * decoded RGB value into the current frame buffer and add the written
684 * number of bytes (RGB) to the *pcopylen.
685 *
686 */
687 static enum parse_state usbvision_parse_compress(struct usb_usbvision *usbvision,
688 long *pcopylen)
689 {
690 #define USBVISION_STRIP_MAGIC 0x5A
691 #define USBVISION_STRIP_LEN_MAX 400
692 #define USBVISION_STRIP_HEADER_LEN 3
693
694 struct usbvision_frame *frame;
695 unsigned char *f, *u = NULL, *v = NULL;
696 unsigned char strip_data[USBVISION_STRIP_LEN_MAX];
697 unsigned char strip_header[USBVISION_STRIP_HEADER_LEN];
698 int idx, idx_end, strip_len, strip_ptr, startblock_pos, block_pos, block_type_pos;
699 int clipmask_index;
700 int image_size;
701 unsigned char rv, gv, bv;
702 static unsigned char *Y, *U, *V;
703
704 frame = usbvision->cur_frame;
705 image_size = frame->frmwidth * frame->frmheight;
706 if ((frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) ||
707 (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420)) { /* this is a planar format */
708 /* ... v4l2_linesize not used here. */
709 f = frame->data + (frame->width * frame->curline);
710 } else
711 f = frame->data + (frame->v4l2_linesize * frame->curline);
712
713 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { /* initialise u and v pointers */
714 /* get base of u and b planes add halfoffset */
715 u = frame->data
716 + image_size
717 + (frame->frmwidth >> 1) * frame->curline;
718 v = u + (image_size >> 1);
719 } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) {
720 v = frame->data + image_size + ((frame->curline * (frame->width)) >> 2);
721 u = v + (image_size >> 2);
722 }
723
724 if (frame->curline == 0)
725 usbvision_adjust_compression(usbvision);
726
727 if (scratch_len(usbvision) < USBVISION_STRIP_HEADER_LEN)
728 return parse_state_out;
729
730 /* get strip header without changing the scratch_read_ptr */
731 scratch_set_extra_ptr(usbvision, &strip_ptr, 0);
732 scratch_get_extra(usbvision, &strip_header[0], &strip_ptr,
733 USBVISION_STRIP_HEADER_LEN);
734
735 if (strip_header[0] != USBVISION_STRIP_MAGIC) {
736 /* wrong strip magic */
737 usbvision->strip_magic_errors++;
738 return parse_state_next_frame;
739 }
740
741 if (frame->curline != (int)strip_header[2]) {
742 /* line number mismatch error */
743 usbvision->strip_line_number_errors++;
744 }
745
746 strip_len = 2 * (unsigned int)strip_header[1];
747 if (strip_len > USBVISION_STRIP_LEN_MAX) {
748 /* strip overrun */
749 /* I think this never happens */
750 usbvision_request_intra(usbvision);
751 }
752
753 if (scratch_len(usbvision) < strip_len) {
754 /* there is not enough data for the strip */
755 return parse_state_out;
756 }
757
758 if (usbvision->intra_frame_buffer) {
759 Y = usbvision->intra_frame_buffer + frame->frmwidth * frame->curline;
760 U = usbvision->intra_frame_buffer + image_size + (frame->frmwidth / 2) * (frame->curline / 2);
761 V = usbvision->intra_frame_buffer + image_size / 4 * 5 + (frame->frmwidth / 2) * (frame->curline / 2);
762 } else {
763 return parse_state_next_frame;
764 }
765
766 clipmask_index = frame->curline * MAX_FRAME_WIDTH;
767
768 scratch_get(usbvision, strip_data, strip_len);
769
770 idx_end = frame->frmwidth;
771 block_type_pos = USBVISION_STRIP_HEADER_LEN;
772 startblock_pos = block_type_pos + (idx_end - 1) / 96 + (idx_end / 2 - 1) / 96 + 2;
773 block_pos = startblock_pos;
774
775 usbvision->block_pos = block_pos;
776
777 usbvision_decompress(usbvision, strip_data, Y, &block_pos, &block_type_pos, idx_end);
778 if (strip_len > usbvision->max_strip_len)
779 usbvision->max_strip_len = strip_len;
780
781 if (frame->curline % 2)
782 usbvision_decompress(usbvision, strip_data, V, &block_pos, &block_type_pos, idx_end / 2);
783 else
784 usbvision_decompress(usbvision, strip_data, U, &block_pos, &block_type_pos, idx_end / 2);
785
786 if (block_pos > usbvision->comprblock_pos)
787 usbvision->comprblock_pos = block_pos;
788 if (block_pos > strip_len)
789 usbvision->strip_len_errors++;
790
791 for (idx = 0; idx < idx_end; idx++) {
792 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
793 *f++ = Y[idx];
794 *f++ = idx & 0x01 ? U[idx / 2] : V[idx / 2];
795 } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) {
796 *f++ = Y[idx];
797 if (idx & 0x01)
798 *u++ = U[idx >> 1];
799 else
800 *v++ = V[idx >> 1];
801 } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) {
802 *f++ = Y[idx];
803 if (!((idx & 0x01) | (frame->curline & 0x01))) {
804 /* only need do this for 1 in 4 pixels */
805 /* intraframe buffer is YUV420 format */
806 *u++ = U[idx >> 1];
807 *v++ = V[idx >> 1];
808 }
809 } else {
810 YUV_TO_RGB_BY_THE_BOOK(Y[idx], U[idx / 2], V[idx / 2], rv, gv, bv);
811 switch (frame->v4l2_format.format) {
812 case V4L2_PIX_FMT_GREY:
813 *f++ = Y[idx];
814 break;
815 case V4L2_PIX_FMT_RGB555:
816 *f++ = (0x1F & rv) |
817 (0xE0 & (gv << 5));
818 *f++ = (0x03 & (gv >> 3)) |
819 (0x7C & (bv << 2));
820 break;
821 case V4L2_PIX_FMT_RGB565:
822 *f++ = (0x1F & rv) |
823 (0xE0 & (gv << 5));
824 *f++ = (0x07 & (gv >> 3)) |
825 (0xF8 & bv);
826 break;
827 case V4L2_PIX_FMT_RGB24:
828 *f++ = rv;
829 *f++ = gv;
830 *f++ = bv;
831 break;
832 case V4L2_PIX_FMT_RGB32:
833 *f++ = rv;
834 *f++ = gv;
835 *f++ = bv;
836 f++;
837 break;
838 }
839 }
840 clipmask_index++;
841 }
842 /* Deal with non-integer no. of bytes for YUV420P */
843 if (frame->v4l2_format.format != V4L2_PIX_FMT_YVU420)
844 *pcopylen += frame->v4l2_linesize;
845 else
846 *pcopylen += frame->curline & 0x01 ? frame->v4l2_linesize : frame->v4l2_linesize << 1;
847
848 frame->curline += 1;
849
850 if (frame->curline >= frame->frmheight)
851 return parse_state_next_frame;
852 return parse_state_continue;
853
854 }
855
856
857 /*
858 * usbvision_parse_lines_420()
859 *
860 * Parse two lines from the scratch buffer, put
861 * decoded RGB value into the current frame buffer and add the written
862 * number of bytes (RGB) to the *pcopylen.
863 *
864 */
865 static enum parse_state usbvision_parse_lines_420(struct usb_usbvision *usbvision,
866 long *pcopylen)
867 {
868 struct usbvision_frame *frame;
869 unsigned char *f_even = NULL, *f_odd = NULL;
870 unsigned int pixel_per_line, block;
871 int pixel, block_split;
872 int y_ptr, u_ptr, v_ptr, y_odd_offset;
873 const int y_block_size = 128;
874 const int uv_block_size = 64;
875 const int sub_block_size = 32;
876 const int y_step[] = { 0, 0, 0, 2 }, y_step_size = 4;
877 const int uv_step[] = { 0, 0, 0, 4 }, uv_step_size = 4;
878 unsigned char y[2], u, v; /* YUV components */
879 int y_, u_, v_, vb, uvg, ur;
880 int r_, g_, b_; /* RGB components */
881 unsigned char g;
882 int clipmask_even_index, clipmask_odd_index, bytes_per_pixel;
883 int clipmask_add, stretch_bytes;
884
885 frame = usbvision->cur_frame;
886 f_even = frame->data + (frame->v4l2_linesize * frame->curline);
887 f_odd = f_even + frame->v4l2_linesize * usbvision->stretch_height;
888
889 /* Make sure there's enough data for the entire line */
890 /* In this mode usbvision transfer 3 bytes for every 2 pixels */
891 /* I need two lines to decode the color */
892 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
893 stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
894 clipmask_even_index = frame->curline * MAX_FRAME_WIDTH;
895 clipmask_odd_index = clipmask_even_index + MAX_FRAME_WIDTH;
896 clipmask_add = usbvision->stretch_width;
897 pixel_per_line = frame->isoc_header.frame_width;
898
899 if (scratch_len(usbvision) < (int)pixel_per_line * 3) {
900 /* printk(KERN_DEBUG "out of data, need %d\n", len); */
901 return parse_state_out;
902 }
903
904 if ((frame->curline + 1) >= frame->frmheight)
905 return parse_state_next_frame;
906
907 block_split = (pixel_per_line%y_block_size) ? 1 : 0; /* are some blocks splitted into different lines? */
908
909 y_odd_offset = (pixel_per_line / y_block_size) * (y_block_size + uv_block_size)
910 + block_split * uv_block_size;
911
912 scratch_set_extra_ptr(usbvision, &y_ptr, y_odd_offset);
913 scratch_set_extra_ptr(usbvision, &u_ptr, y_block_size);
914 scratch_set_extra_ptr(usbvision, &v_ptr, y_odd_offset
915 + (4 - block_split) * sub_block_size);
916
917 for (block = 0; block < (pixel_per_line / sub_block_size); block++) {
918 for (pixel = 0; pixel < sub_block_size; pixel += 2) {
919 scratch_get(usbvision, &y[0], 2);
920 scratch_get_extra(usbvision, &u, &u_ptr, 1);
921 scratch_get_extra(usbvision, &v, &v_ptr, 1);
922
923 /* I don't use the YUV_TO_RGB macro for better performance */
924 v_ = v - 128;
925 u_ = u - 128;
926 vb = 132252 * v_;
927 uvg = -53281 * u_ - 25625 * v_;
928 ur = 104595 * u_;
929
930 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
931 *f_even++ = y[0];
932 *f_even++ = v;
933 } else {
934 y_ = 76284 * (y[0] - 16);
935
936 b_ = (y_ + vb) >> 16;
937 g_ = (y_ + uvg) >> 16;
938 r_ = (y_ + ur) >> 16;
939
940 switch (frame->v4l2_format.format) {
941 case V4L2_PIX_FMT_RGB565:
942 g = LIMIT_RGB(g_);
943 *f_even++ =
944 (0x1F & LIMIT_RGB(r_)) |
945 (0xE0 & (g << 5));
946 *f_even++ =
947 (0x07 & (g >> 3)) |
948 (0xF8 & LIMIT_RGB(b_));
949 break;
950 case V4L2_PIX_FMT_RGB24:
951 *f_even++ = LIMIT_RGB(r_);
952 *f_even++ = LIMIT_RGB(g_);
953 *f_even++ = LIMIT_RGB(b_);
954 break;
955 case V4L2_PIX_FMT_RGB32:
956 *f_even++ = LIMIT_RGB(r_);
957 *f_even++ = LIMIT_RGB(g_);
958 *f_even++ = LIMIT_RGB(b_);
959 f_even++;
960 break;
961 case V4L2_PIX_FMT_RGB555:
962 g = LIMIT_RGB(g_);
963 *f_even++ = (0x1F & LIMIT_RGB(r_)) |
964 (0xE0 & (g << 5));
965 *f_even++ = (0x03 & (g >> 3)) |
966 (0x7C & (LIMIT_RGB(b_) << 2));
967 break;
968 }
969 }
970 clipmask_even_index += clipmask_add;
971 f_even += stretch_bytes;
972
973 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
974 *f_even++ = y[1];
975 *f_even++ = u;
976 } else {
977 y_ = 76284 * (y[1] - 16);
978
979 b_ = (y_ + vb) >> 16;
980 g_ = (y_ + uvg) >> 16;
981 r_ = (y_ + ur) >> 16;
982
983 switch (frame->v4l2_format.format) {
984 case V4L2_PIX_FMT_RGB565:
985 g = LIMIT_RGB(g_);
986 *f_even++ =
987 (0x1F & LIMIT_RGB(r_)) |
988 (0xE0 & (g << 5));
989 *f_even++ =
990 (0x07 & (g >> 3)) |
991 (0xF8 & LIMIT_RGB(b_));
992 break;
993 case V4L2_PIX_FMT_RGB24:
994 *f_even++ = LIMIT_RGB(r_);
995 *f_even++ = LIMIT_RGB(g_);
996 *f_even++ = LIMIT_RGB(b_);
997 break;
998 case V4L2_PIX_FMT_RGB32:
999 *f_even++ = LIMIT_RGB(r_);
1000 *f_even++ = LIMIT_RGB(g_);
1001 *f_even++ = LIMIT_RGB(b_);
1002 f_even++;
1003 break;
1004 case V4L2_PIX_FMT_RGB555:
1005 g = LIMIT_RGB(g_);
1006 *f_even++ = (0x1F & LIMIT_RGB(r_)) |
1007 (0xE0 & (g << 5));
1008 *f_even++ = (0x03 & (g >> 3)) |
1009 (0x7C & (LIMIT_RGB(b_) << 2));
1010 break;
1011 }
1012 }
1013 clipmask_even_index += clipmask_add;
1014 f_even += stretch_bytes;
1015
1016 scratch_get_extra(usbvision, &y[0], &y_ptr, 2);
1017
1018 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1019 *f_odd++ = y[0];
1020 *f_odd++ = v;
1021 } else {
1022 y_ = 76284 * (y[0] - 16);
1023
1024 b_ = (y_ + vb) >> 16;
1025 g_ = (y_ + uvg) >> 16;
1026 r_ = (y_ + ur) >> 16;
1027
1028 switch (frame->v4l2_format.format) {
1029 case V4L2_PIX_FMT_RGB565:
1030 g = LIMIT_RGB(g_);
1031 *f_odd++ =
1032 (0x1F & LIMIT_RGB(r_)) |
1033 (0xE0 & (g << 5));
1034 *f_odd++ =
1035 (0x07 & (g >> 3)) |
1036 (0xF8 & LIMIT_RGB(b_));
1037 break;
1038 case V4L2_PIX_FMT_RGB24:
1039 *f_odd++ = LIMIT_RGB(r_);
1040 *f_odd++ = LIMIT_RGB(g_);
1041 *f_odd++ = LIMIT_RGB(b_);
1042 break;
1043 case V4L2_PIX_FMT_RGB32:
1044 *f_odd++ = LIMIT_RGB(r_);
1045 *f_odd++ = LIMIT_RGB(g_);
1046 *f_odd++ = LIMIT_RGB(b_);
1047 f_odd++;
1048 break;
1049 case V4L2_PIX_FMT_RGB555:
1050 g = LIMIT_RGB(g_);
1051 *f_odd++ = (0x1F & LIMIT_RGB(r_)) |
1052 (0xE0 & (g << 5));
1053 *f_odd++ = (0x03 & (g >> 3)) |
1054 (0x7C & (LIMIT_RGB(b_) << 2));
1055 break;
1056 }
1057 }
1058 clipmask_odd_index += clipmask_add;
1059 f_odd += stretch_bytes;
1060
1061 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1062 *f_odd++ = y[1];
1063 *f_odd++ = u;
1064 } else {
1065 y_ = 76284 * (y[1] - 16);
1066
1067 b_ = (y_ + vb) >> 16;
1068 g_ = (y_ + uvg) >> 16;
1069 r_ = (y_ + ur) >> 16;
1070
1071 switch (frame->v4l2_format.format) {
1072 case V4L2_PIX_FMT_RGB565:
1073 g = LIMIT_RGB(g_);
1074 *f_odd++ =
1075 (0x1F & LIMIT_RGB(r_)) |
1076 (0xE0 & (g << 5));
1077 *f_odd++ =
1078 (0x07 & (g >> 3)) |
1079 (0xF8 & LIMIT_RGB(b_));
1080 break;
1081 case V4L2_PIX_FMT_RGB24:
1082 *f_odd++ = LIMIT_RGB(r_);
1083 *f_odd++ = LIMIT_RGB(g_);
1084 *f_odd++ = LIMIT_RGB(b_);
1085 break;
1086 case V4L2_PIX_FMT_RGB32:
1087 *f_odd++ = LIMIT_RGB(r_);
1088 *f_odd++ = LIMIT_RGB(g_);
1089 *f_odd++ = LIMIT_RGB(b_);
1090 f_odd++;
1091 break;
1092 case V4L2_PIX_FMT_RGB555:
1093 g = LIMIT_RGB(g_);
1094 *f_odd++ = (0x1F & LIMIT_RGB(r_)) |
1095 (0xE0 & (g << 5));
1096 *f_odd++ = (0x03 & (g >> 3)) |
1097 (0x7C & (LIMIT_RGB(b_) << 2));
1098 break;
1099 }
1100 }
1101 clipmask_odd_index += clipmask_add;
1102 f_odd += stretch_bytes;
1103 }
1104
1105 scratch_rm_old(usbvision, y_step[block % y_step_size] * sub_block_size);
1106 scratch_inc_extra_ptr(&y_ptr, y_step[(block + 2 * block_split) % y_step_size]
1107 * sub_block_size);
1108 scratch_inc_extra_ptr(&u_ptr, uv_step[block % uv_step_size]
1109 * sub_block_size);
1110 scratch_inc_extra_ptr(&v_ptr, uv_step[(block + 2 * block_split) % uv_step_size]
1111 * sub_block_size);
1112 }
1113
1114 scratch_rm_old(usbvision, pixel_per_line * 3 / 2
1115 + block_split * sub_block_size);
1116
1117 frame->curline += 2 * usbvision->stretch_height;
1118 *pcopylen += frame->v4l2_linesize * 2 * usbvision->stretch_height;
1119
1120 if (frame->curline >= frame->frmheight)
1121 return parse_state_next_frame;
1122 return parse_state_continue;
1123 }
1124
1125 /*
1126 * usbvision_parse_data()
1127 *
1128 * Generic routine to parse the scratch buffer. It employs either
1129 * usbvision_find_header() or usbvision_parse_lines() to do most
1130 * of work.
1131 *
1132 */
1133 static void usbvision_parse_data(struct usb_usbvision *usbvision)
1134 {
1135 struct usbvision_frame *frame;
1136 enum parse_state newstate;
1137 long copylen = 0;
1138 unsigned long lock_flags;
1139
1140 frame = usbvision->cur_frame;
1141
1142 PDEBUG(DBG_PARSE, "parsing len=%d\n", scratch_len(usbvision));
1143
1144 while (1) {
1145 newstate = parse_state_out;
1146 if (scratch_len(usbvision)) {
1147 if (frame->scanstate == scan_state_scanning) {
1148 newstate = usbvision_find_header(usbvision);
1149 } else if (frame->scanstate == scan_state_lines) {
1150 if (usbvision->isoc_mode == ISOC_MODE_YUV420)
1151 newstate = usbvision_parse_lines_420(usbvision, &copylen);
1152 else if (usbvision->isoc_mode == ISOC_MODE_YUV422)
1153 newstate = usbvision_parse_lines_422(usbvision, &copylen);
1154 else if (usbvision->isoc_mode == ISOC_MODE_COMPRESS)
1155 newstate = usbvision_parse_compress(usbvision, &copylen);
1156 }
1157 }
1158 if (newstate == parse_state_continue)
1159 continue;
1160 if ((newstate == parse_state_next_frame) || (newstate == parse_state_out))
1161 break;
1162 return; /* parse_state_end_parse */
1163 }
1164
1165 if (newstate == parse_state_next_frame) {
1166 frame->grabstate = frame_state_done;
1167 v4l2_get_timestamp(&(frame->timestamp));
1168 frame->sequence = usbvision->frame_num;
1169
1170 spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
1171 list_move_tail(&(frame->frame), &usbvision->outqueue);
1172 usbvision->cur_frame = NULL;
1173 spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
1174
1175 usbvision->frame_num++;
1176
1177 /* This will cause the process to request another frame. */
1178 if (waitqueue_active(&usbvision->wait_frame)) {
1179 PDEBUG(DBG_PARSE, "Wake up !");
1180 wake_up_interruptible(&usbvision->wait_frame);
1181 }
1182 } else {
1183 frame->grabstate = frame_state_grabbing;
1184 }
1185
1186 /* Update the frame's uncompressed length. */
1187 frame->scanlength += copylen;
1188 }
1189
1190
1191 /*
1192 * Make all of the blocks of data contiguous
1193 */
1194 static int usbvision_compress_isochronous(struct usb_usbvision *usbvision,
1195 struct urb *urb)
1196 {
1197 unsigned char *packet_data;
1198 int i, totlen = 0;
1199
1200 for (i = 0; i < urb->number_of_packets; i++) {
1201 int packet_len = urb->iso_frame_desc[i].actual_length;
1202 int packet_stat = urb->iso_frame_desc[i].status;
1203
1204 packet_data = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
1205
1206 /* Detect and ignore errored packets */
1207 if (packet_stat) { /* packet_stat != 0 ????????????? */
1208 PDEBUG(DBG_ISOC, "data error: [%d] len=%d, status=%X", i, packet_len, packet_stat);
1209 usbvision->isoc_err_count++;
1210 continue;
1211 }
1212
1213 /* Detect and ignore empty packets */
1214 if (packet_len < 0) {
1215 PDEBUG(DBG_ISOC, "error packet [%d]", i);
1216 usbvision->isoc_skip_count++;
1217 continue;
1218 } else if (packet_len == 0) { /* Frame end ????? */
1219 PDEBUG(DBG_ISOC, "null packet [%d]", i);
1220 usbvision->isocstate = isoc_state_no_frame;
1221 usbvision->isoc_skip_count++;
1222 continue;
1223 } else if (packet_len > usbvision->isoc_packet_size) {
1224 PDEBUG(DBG_ISOC, "packet[%d] > isoc_packet_size", i);
1225 usbvision->isoc_skip_count++;
1226 continue;
1227 }
1228
1229 PDEBUG(DBG_ISOC, "packet ok [%d] len=%d", i, packet_len);
1230
1231 if (usbvision->isocstate == isoc_state_no_frame) { /* new frame begins */
1232 usbvision->isocstate = isoc_state_in_frame;
1233 scratch_mark_header(usbvision);
1234 usbvision_measure_bandwidth(usbvision);
1235 PDEBUG(DBG_ISOC, "packet with header");
1236 }
1237
1238 /*
1239 * If usbvision continues to feed us with data but there is no
1240 * consumption (if, for example, V4L client fell asleep) we
1241 * may overflow the buffer. We have to move old data over to
1242 * free room for new data. This is bad for old data. If we
1243 * just drop new data then it's bad for new data... choose
1244 * your favorite evil here.
1245 */
1246 if (scratch_free(usbvision) < packet_len) {
1247 usbvision->scratch_ovf_count++;
1248 PDEBUG(DBG_ISOC, "scratch buf overflow! scr_len: %d, n: %d",
1249 scratch_len(usbvision), packet_len);
1250 scratch_rm_old(usbvision, packet_len - scratch_free(usbvision));
1251 }
1252
1253 /* Now we know that there is enough room in scratch buffer */
1254 scratch_put(usbvision, packet_data, packet_len);
1255 totlen += packet_len;
1256 usbvision->isoc_data_count += packet_len;
1257 usbvision->isoc_packet_count++;
1258 }
1259 #if ENABLE_HEXDUMP
1260 if (totlen > 0) {
1261 static int foo;
1262
1263 if (foo < 1) {
1264 printk(KERN_DEBUG "+%d.\n", usbvision->scratchlen);
1265 usbvision_hexdump(data0, (totlen > 64) ? 64 : totlen);
1266 ++foo;
1267 }
1268 }
1269 #endif
1270 return totlen;
1271 }
1272
1273 static void usbvision_isoc_irq(struct urb *urb)
1274 {
1275 int err_code = 0;
1276 int len;
1277 struct usb_usbvision *usbvision = urb->context;
1278 int i;
1279 unsigned long start_time = jiffies;
1280 struct usbvision_frame **f;
1281
1282 /* We don't want to do anything if we are about to be removed! */
1283 if (!USBVISION_IS_OPERATIONAL(usbvision))
1284 return;
1285
1286 /* any urb with wrong status is ignored without acknowledgement */
1287 if (urb->status == -ENOENT)
1288 return;
1289
1290 f = &usbvision->cur_frame;
1291
1292 /* Manage streaming interruption */
1293 if (usbvision->streaming == stream_interrupt) {
1294 usbvision->streaming = stream_idle;
1295 if ((*f)) {
1296 (*f)->grabstate = frame_state_ready;
1297 (*f)->scanstate = scan_state_scanning;
1298 }
1299 PDEBUG(DBG_IRQ, "stream interrupted");
1300 wake_up_interruptible(&usbvision->wait_stream);
1301 }
1302
1303 /* Copy the data received into our scratch buffer */
1304 len = usbvision_compress_isochronous(usbvision, urb);
1305
1306 usbvision->isoc_urb_count++;
1307 usbvision->urb_length = len;
1308
1309 if (usbvision->streaming == stream_on) {
1310 /* If we collected enough data let's parse! */
1311 if (scratch_len(usbvision) > USBVISION_HEADER_LENGTH &&
1312 !list_empty(&(usbvision->inqueue))) {
1313 if (!(*f)) {
1314 (*f) = list_entry(usbvision->inqueue.next,
1315 struct usbvision_frame,
1316 frame);
1317 }
1318 usbvision_parse_data(usbvision);
1319 } else {
1320 /* If we don't have a frame
1321 we're current working on, complain */
1322 PDEBUG(DBG_IRQ,
1323 "received data, but no one needs it");
1324 scratch_reset(usbvision);
1325 }
1326 } else {
1327 PDEBUG(DBG_IRQ, "received data, but no one needs it");
1328 scratch_reset(usbvision);
1329 }
1330
1331 usbvision->time_in_irq += jiffies - start_time;
1332
1333 for (i = 0; i < USBVISION_URB_FRAMES; i++) {
1334 urb->iso_frame_desc[i].status = 0;
1335 urb->iso_frame_desc[i].actual_length = 0;
1336 }
1337
1338 urb->status = 0;
1339 urb->dev = usbvision->dev;
1340 err_code = usb_submit_urb(urb, GFP_ATOMIC);
1341
1342 if (err_code) {
1343 dev_err(&usbvision->dev->dev,
1344 "%s: usb_submit_urb failed: error %d\n",
1345 __func__, err_code);
1346 }
1347
1348 return;
1349 }
1350
1351 /*************************************/
1352 /* Low level usbvision access functions */
1353 /*************************************/
1354
1355 /*
1356 * usbvision_read_reg()
1357 *
1358 * return < 0 -> Error
1359 * >= 0 -> Data
1360 */
1361
1362 int usbvision_read_reg(struct usb_usbvision *usbvision, unsigned char reg)
1363 {
1364 int err_code = 0;
1365 unsigned char *buffer = usbvision->ctrl_urb_buffer;
1366
1367 if (!USBVISION_IS_OPERATIONAL(usbvision))
1368 return -1;
1369
1370 err_code = usb_control_msg(usbvision->dev, usb_rcvctrlpipe(usbvision->dev, 1),
1371 USBVISION_OP_CODE,
1372 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1373 0, (__u16) reg, buffer, 1, HZ);
1374
1375 if (err_code < 0) {
1376 dev_err(&usbvision->dev->dev,
1377 "%s: failed: error %d\n", __func__, err_code);
1378 return err_code;
1379 }
1380 return buffer[0];
1381 }
1382
1383 /*
1384 * usbvision_write_reg()
1385 *
1386 * return 1 -> Reg written
1387 * 0 -> usbvision is not yet ready
1388 * -1 -> Something went wrong
1389 */
1390
1391 int usbvision_write_reg(struct usb_usbvision *usbvision, unsigned char reg,
1392 unsigned char value)
1393 {
1394 int err_code = 0;
1395
1396 if (!USBVISION_IS_OPERATIONAL(usbvision))
1397 return 0;
1398
1399 usbvision->ctrl_urb_buffer[0] = value;
1400 err_code = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1401 USBVISION_OP_CODE,
1402 USB_DIR_OUT | USB_TYPE_VENDOR |
1403 USB_RECIP_ENDPOINT, 0, (__u16) reg,
1404 usbvision->ctrl_urb_buffer, 1, HZ);
1405
1406 if (err_code < 0) {
1407 dev_err(&usbvision->dev->dev,
1408 "%s: failed: error %d\n", __func__, err_code);
1409 }
1410 return err_code;
1411 }
1412
1413
1414 static void usbvision_ctrl_urb_complete(struct urb *urb)
1415 {
1416 struct usb_usbvision *usbvision = (struct usb_usbvision *)urb->context;
1417
1418 PDEBUG(DBG_IRQ, "");
1419 usbvision->ctrl_urb_busy = 0;
1420 if (waitqueue_active(&usbvision->ctrl_urb_wq))
1421 wake_up_interruptible(&usbvision->ctrl_urb_wq);
1422 }
1423
1424
1425 static int usbvision_write_reg_irq(struct usb_usbvision *usbvision, int address,
1426 unsigned char *data, int len)
1427 {
1428 int err_code = 0;
1429
1430 PDEBUG(DBG_IRQ, "");
1431 if (len > 8)
1432 return -EFAULT;
1433 if (usbvision->ctrl_urb_busy)
1434 return -EBUSY;
1435 usbvision->ctrl_urb_busy = 1;
1436
1437 usbvision->ctrl_urb_setup.bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT;
1438 usbvision->ctrl_urb_setup.bRequest = USBVISION_OP_CODE;
1439 usbvision->ctrl_urb_setup.wValue = 0;
1440 usbvision->ctrl_urb_setup.wIndex = cpu_to_le16(address);
1441 usbvision->ctrl_urb_setup.wLength = cpu_to_le16(len);
1442 usb_fill_control_urb(usbvision->ctrl_urb, usbvision->dev,
1443 usb_sndctrlpipe(usbvision->dev, 1),
1444 (unsigned char *)&usbvision->ctrl_urb_setup,
1445 (void *)usbvision->ctrl_urb_buffer, len,
1446 usbvision_ctrl_urb_complete,
1447 (void *)usbvision);
1448
1449 memcpy(usbvision->ctrl_urb_buffer, data, len);
1450
1451 err_code = usb_submit_urb(usbvision->ctrl_urb, GFP_ATOMIC);
1452 if (err_code < 0) {
1453 /* error in usb_submit_urb() */
1454 usbvision->ctrl_urb_busy = 0;
1455 }
1456 PDEBUG(DBG_IRQ, "submit %d byte: error %d", len, err_code);
1457 return err_code;
1458 }
1459
1460
1461 static int usbvision_init_compression(struct usb_usbvision *usbvision)
1462 {
1463 usbvision->last_isoc_frame_num = -1;
1464 usbvision->isoc_data_count = 0;
1465 usbvision->isoc_packet_count = 0;
1466 usbvision->isoc_skip_count = 0;
1467 usbvision->compr_level = 50;
1468 usbvision->last_compr_level = -1;
1469 usbvision->isoc_urb_count = 0;
1470 usbvision->request_intra = 1;
1471 usbvision->isoc_measure_bandwidth_count = 0;
1472
1473 return 0;
1474 }
1475
1476 /* this function measures the used bandwidth since last call
1477 * return: 0 : no error
1478 * sets used_bandwidth to 1-100 : 1-100% of full bandwidth resp. to isoc_packet_size
1479 */
1480 static int usbvision_measure_bandwidth(struct usb_usbvision *usbvision)
1481 {
1482 if (usbvision->isoc_measure_bandwidth_count < 2) { /* this gives an average bandwidth of 3 frames */
1483 usbvision->isoc_measure_bandwidth_count++;
1484 return 0;
1485 }
1486 if ((usbvision->isoc_packet_size > 0) && (usbvision->isoc_packet_count > 0)) {
1487 usbvision->used_bandwidth = usbvision->isoc_data_count /
1488 (usbvision->isoc_packet_count + usbvision->isoc_skip_count) *
1489 100 / usbvision->isoc_packet_size;
1490 }
1491 usbvision->isoc_measure_bandwidth_count = 0;
1492 usbvision->isoc_data_count = 0;
1493 usbvision->isoc_packet_count = 0;
1494 usbvision->isoc_skip_count = 0;
1495 return 0;
1496 }
1497
1498 static int usbvision_adjust_compression(struct usb_usbvision *usbvision)
1499 {
1500 int err_code = 0;
1501 unsigned char buffer[6];
1502
1503 PDEBUG(DBG_IRQ, "");
1504 if ((adjust_compression) && (usbvision->used_bandwidth > 0)) {
1505 usbvision->compr_level += (usbvision->used_bandwidth - 90) / 2;
1506 RESTRICT_TO_RANGE(usbvision->compr_level, 0, 100);
1507 if (usbvision->compr_level != usbvision->last_compr_level) {
1508 int distortion;
1509
1510 if (usbvision->bridge_type == BRIDGE_NT1004 || usbvision->bridge_type == BRIDGE_NT1005) {
1511 buffer[0] = (unsigned char)(4 + 16 * usbvision->compr_level / 100); /* PCM Threshold 1 */
1512 buffer[1] = (unsigned char)(4 + 8 * usbvision->compr_level / 100); /* PCM Threshold 2 */
1513 distortion = 7 + 248 * usbvision->compr_level / 100;
1514 buffer[2] = (unsigned char)(distortion & 0xFF); /* Average distortion Threshold (inter) */
1515 buffer[3] = (unsigned char)(distortion & 0xFF); /* Average distortion Threshold (intra) */
1516 distortion = 1 + 42 * usbvision->compr_level / 100;
1517 buffer[4] = (unsigned char)(distortion & 0xFF); /* Maximum distortion Threshold (inter) */
1518 buffer[5] = (unsigned char)(distortion & 0xFF); /* Maximum distortion Threshold (intra) */
1519 } else { /* BRIDGE_NT1003 */
1520 buffer[0] = (unsigned char)(4 + 16 * usbvision->compr_level / 100); /* PCM threshold 1 */
1521 buffer[1] = (unsigned char)(4 + 8 * usbvision->compr_level / 100); /* PCM threshold 2 */
1522 distortion = 2 + 253 * usbvision->compr_level / 100;
1523 buffer[2] = (unsigned char)(distortion & 0xFF); /* distortion threshold bit0-7 */
1524 buffer[3] = 0; /* (unsigned char)((distortion >> 8) & 0x0F); distortion threshold bit 8-11 */
1525 distortion = 0 + 43 * usbvision->compr_level / 100;
1526 buffer[4] = (unsigned char)(distortion & 0xFF); /* maximum distortion bit0-7 */
1527 buffer[5] = 0; /* (unsigned char)((distortion >> 8) & 0x01); maximum distortion bit 8 */
1528 }
1529 err_code = usbvision_write_reg_irq(usbvision, USBVISION_PCM_THR1, buffer, 6);
1530 if (err_code == 0) {
1531 PDEBUG(DBG_IRQ, "new compr params %#02x %#02x %#02x %#02x %#02x %#02x", buffer[0],
1532 buffer[1], buffer[2], buffer[3], buffer[4], buffer[5]);
1533 usbvision->last_compr_level = usbvision->compr_level;
1534 }
1535 }
1536 }
1537 return err_code;
1538 }
1539
1540 static int usbvision_request_intra(struct usb_usbvision *usbvision)
1541 {
1542 unsigned char buffer[1];
1543
1544 PDEBUG(DBG_IRQ, "");
1545 usbvision->request_intra = 1;
1546 buffer[0] = 1;
1547 usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1548 return 0;
1549 }
1550
1551 static int usbvision_unrequest_intra(struct usb_usbvision *usbvision)
1552 {
1553 unsigned char buffer[1];
1554
1555 PDEBUG(DBG_IRQ, "");
1556 usbvision->request_intra = 0;
1557 buffer[0] = 0;
1558 usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1559 return 0;
1560 }
1561
1562 /*******************************
1563 * usbvision utility functions
1564 *******************************/
1565
1566 int usbvision_power_off(struct usb_usbvision *usbvision)
1567 {
1568 int err_code = 0;
1569
1570 PDEBUG(DBG_FUNC, "");
1571
1572 err_code = usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
1573 if (err_code == 1)
1574 usbvision->power = 0;
1575 PDEBUG(DBG_FUNC, "%s: err_code %d", (err_code != 1) ? "ERROR" : "power is off", err_code);
1576 return err_code;
1577 }
1578
1579 /* configure webcam image sensor using the serial port */
1580 static int usbvision_init_webcam(struct usb_usbvision *usbvision)
1581 {
1582 int rc;
1583 int i;
1584 static char init_values[38][3] = {
1585 { 0x04, 0x12, 0x08 }, { 0x05, 0xff, 0xc8 }, { 0x06, 0x18, 0x07 }, { 0x07, 0x90, 0x00 },
1586 { 0x09, 0x00, 0x00 }, { 0x0a, 0x00, 0x00 }, { 0x0b, 0x08, 0x00 }, { 0x0d, 0xcc, 0xcc },
1587 { 0x0e, 0x13, 0x14 }, { 0x10, 0x9b, 0x83 }, { 0x11, 0x5a, 0x3f }, { 0x12, 0xe4, 0x73 },
1588 { 0x13, 0x88, 0x84 }, { 0x14, 0x89, 0x80 }, { 0x15, 0x00, 0x20 }, { 0x16, 0x00, 0x00 },
1589 { 0x17, 0xff, 0xa0 }, { 0x18, 0x6b, 0x20 }, { 0x19, 0x22, 0x40 }, { 0x1a, 0x10, 0x07 },
1590 { 0x1b, 0x00, 0x47 }, { 0x1c, 0x03, 0xe0 }, { 0x1d, 0x00, 0x00 }, { 0x1e, 0x00, 0x00 },
1591 { 0x1f, 0x00, 0x00 }, { 0x20, 0x00, 0x00 }, { 0x21, 0x00, 0x00 }, { 0x22, 0x00, 0x00 },
1592 { 0x23, 0x00, 0x00 }, { 0x24, 0x00, 0x00 }, { 0x25, 0x00, 0x00 }, { 0x26, 0x00, 0x00 },
1593 { 0x27, 0x00, 0x00 }, { 0x28, 0x00, 0x00 }, { 0x29, 0x00, 0x00 }, { 0x08, 0x80, 0x60 },
1594 { 0x0f, 0x2d, 0x24 }, { 0x0c, 0x80, 0x80 }
1595 };
1596 unsigned char *value = usbvision->ctrl_urb_buffer;
1597
1598 /* the only difference between PAL and NTSC init_values */
1599 if (usbvision_device_data[usbvision->dev_model].video_norm == V4L2_STD_NTSC)
1600 init_values[4][1] = 0x34;
1601
1602 for (i = 0; i < sizeof(init_values) / 3; i++) {
1603 usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT);
1604 memcpy(value, init_values[i], 3);
1605 rc = usb_control_msg(usbvision->dev,
1606 usb_sndctrlpipe(usbvision->dev, 1),
1607 USBVISION_OP_CODE,
1608 USB_DIR_OUT | USB_TYPE_VENDOR |
1609 USB_RECIP_ENDPOINT, 0,
1610 (__u16) USBVISION_SER_DAT1, value,
1611 3, HZ);
1612 if (rc < 0)
1613 return rc;
1614 usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SIO);
1615 /* write 3 bytes to the serial port using SIO mode */
1616 usbvision_write_reg(usbvision, USBVISION_SER_CONT, 3 | 0x10);
1617 usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, 0);
1618 usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT);
1619 usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, USBVISION_IO_2);
1620 usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT | USBVISION_CLK_OUT);
1621 usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT | USBVISION_DAT_IO);
1622 usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT | USBVISION_CLK_OUT | USBVISION_DAT_IO);
1623 }
1624
1625 return 0;
1626 }
1627
1628 /*
1629 * usbvision_set_video_format()
1630 *
1631 */
1632 static int usbvision_set_video_format(struct usb_usbvision *usbvision, int format)
1633 {
1634 static const char proc[] = "usbvision_set_video_format";
1635 unsigned char *value = usbvision->ctrl_urb_buffer;
1636 int rc;
1637
1638 if (!USBVISION_IS_OPERATIONAL(usbvision))
1639 return 0;
1640
1641 PDEBUG(DBG_FUNC, "isoc_mode %#02x", format);
1642
1643 if ((format != ISOC_MODE_YUV422)
1644 && (format != ISOC_MODE_YUV420)
1645 && (format != ISOC_MODE_COMPRESS)) {
1646 printk(KERN_ERR "usbvision: unknown video format %02x, using default YUV420",
1647 format);
1648 format = ISOC_MODE_YUV420;
1649 }
1650 value[0] = 0x0A; /* TODO: See the effect of the filter */
1651 value[1] = format; /* Sets the VO_MODE register which follows FILT_CONT */
1652 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1653 USBVISION_OP_CODE,
1654 USB_DIR_OUT | USB_TYPE_VENDOR |
1655 USB_RECIP_ENDPOINT, 0,
1656 (__u16) USBVISION_FILT_CONT, value, 2, HZ);
1657
1658 if (rc < 0) {
1659 printk(KERN_ERR "%s: ERROR=%d. USBVISION stopped - reconnect or reload driver.\n",
1660 proc, rc);
1661 }
1662 usbvision->isoc_mode = format;
1663 return rc;
1664 }
1665
1666 /*
1667 * usbvision_set_output()
1668 *
1669 */
1670
1671 int usbvision_set_output(struct usb_usbvision *usbvision, int width,
1672 int height)
1673 {
1674 int err_code = 0;
1675 int usb_width, usb_height;
1676 unsigned int frame_rate = 0, frame_drop = 0;
1677 unsigned char *value = usbvision->ctrl_urb_buffer;
1678
1679 if (!USBVISION_IS_OPERATIONAL(usbvision))
1680 return 0;
1681
1682 if (width > MAX_USB_WIDTH) {
1683 usb_width = width / 2;
1684 usbvision->stretch_width = 2;
1685 } else {
1686 usb_width = width;
1687 usbvision->stretch_width = 1;
1688 }
1689
1690 if (height > MAX_USB_HEIGHT) {
1691 usb_height = height / 2;
1692 usbvision->stretch_height = 2;
1693 } else {
1694 usb_height = height;
1695 usbvision->stretch_height = 1;
1696 }
1697
1698 RESTRICT_TO_RANGE(usb_width, MIN_FRAME_WIDTH, MAX_USB_WIDTH);
1699 usb_width &= ~(MIN_FRAME_WIDTH-1);
1700 RESTRICT_TO_RANGE(usb_height, MIN_FRAME_HEIGHT, MAX_USB_HEIGHT);
1701 usb_height &= ~(1);
1702
1703 PDEBUG(DBG_FUNC, "usb %dx%d; screen %dx%d; stretch %dx%d",
1704 usb_width, usb_height, width, height,
1705 usbvision->stretch_width, usbvision->stretch_height);
1706
1707 /* I'll not rewrite the same values */
1708 if ((usb_width != usbvision->curwidth) || (usb_height != usbvision->curheight)) {
1709 value[0] = usb_width & 0xff; /* LSB */
1710 value[1] = (usb_width >> 8) & 0x03; /* MSB */
1711 value[2] = usb_height & 0xff; /* LSB */
1712 value[3] = (usb_height >> 8) & 0x03; /* MSB */
1713
1714 err_code = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1715 USBVISION_OP_CODE,
1716 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1717 0, (__u16) USBVISION_LXSIZE_O, value, 4, HZ);
1718
1719 if (err_code < 0) {
1720 dev_err(&usbvision->dev->dev,
1721 "%s failed: error %d\n", __func__, err_code);
1722 return err_code;
1723 }
1724 usbvision->curwidth = usbvision->stretch_width * usb_width;
1725 usbvision->curheight = usbvision->stretch_height * usb_height;
1726 }
1727
1728 if (usbvision->isoc_mode == ISOC_MODE_YUV422)
1729 frame_rate = (usbvision->isoc_packet_size * 1000) / (usb_width * usb_height * 2);
1730 else if (usbvision->isoc_mode == ISOC_MODE_YUV420)
1731 frame_rate = (usbvision->isoc_packet_size * 1000) / ((usb_width * usb_height * 12) / 8);
1732 else
1733 frame_rate = FRAMERATE_MAX;
1734
1735 if (usbvision->tvnorm_id & V4L2_STD_625_50)
1736 frame_drop = frame_rate * 32 / 25 - 1;
1737 else if (usbvision->tvnorm_id & V4L2_STD_525_60)
1738 frame_drop = frame_rate * 32 / 30 - 1;
1739
1740 RESTRICT_TO_RANGE(frame_drop, FRAMERATE_MIN, FRAMERATE_MAX);
1741
1742 PDEBUG(DBG_FUNC, "frame_rate %d fps, frame_drop %d", frame_rate, frame_drop);
1743
1744 frame_drop = FRAMERATE_MAX; /* We can allow the maximum here, because dropping is controlled */
1745
1746 if (usbvision_device_data[usbvision->dev_model].codec == CODEC_WEBCAM) {
1747 if (usbvision_device_data[usbvision->dev_model].video_norm == V4L2_STD_PAL)
1748 frame_drop = 25;
1749 else
1750 frame_drop = 30;
1751 }
1752
1753 /* frame_drop = 7; => frame_phase = 1, 5, 9, 13, 17, 21, 25, 0, 4, 8, ...
1754 => frame_skip = 4;
1755 => frame_rate = (7 + 1) * 25 / 32 = 200 / 32 = 6.25;
1756
1757 frame_drop = 9; => frame_phase = 1, 5, 8, 11, 14, 17, 21, 24, 27, 1, 4, 8, ...
1758 => frame_skip = 4, 3, 3, 3, 3, 4, 3, 3, 3, 3, 4, ...
1759 => frame_rate = (9 + 1) * 25 / 32 = 250 / 32 = 7.8125;
1760 */
1761 err_code = usbvision_write_reg(usbvision, USBVISION_FRM_RATE, frame_drop);
1762 return err_code;
1763 }
1764
1765
1766 /*
1767 * usbvision_frames_alloc
1768 * allocate the required frames
1769 */
1770 int usbvision_frames_alloc(struct usb_usbvision *usbvision, int number_of_frames)
1771 {
1772 int i;
1773
1774 /* needs to be page aligned cause the buffers can be mapped individually! */
1775 usbvision->max_frame_size = PAGE_ALIGN(usbvision->curwidth *
1776 usbvision->curheight *
1777 usbvision->palette.bytes_per_pixel);
1778
1779 /* Try to do my best to allocate the frames the user want in the remaining memory */
1780 usbvision->num_frames = number_of_frames;
1781 while (usbvision->num_frames > 0) {
1782 usbvision->fbuf_size = usbvision->num_frames * usbvision->max_frame_size;
1783 usbvision->fbuf = usbvision_rvmalloc(usbvision->fbuf_size);
1784 if (usbvision->fbuf)
1785 break;
1786 usbvision->num_frames--;
1787 }
1788
1789 /* Allocate all buffers */
1790 for (i = 0; i < usbvision->num_frames; i++) {
1791 usbvision->frame[i].index = i;
1792 usbvision->frame[i].grabstate = frame_state_unused;
1793 usbvision->frame[i].data = usbvision->fbuf +
1794 i * usbvision->max_frame_size;
1795 /*
1796 * Set default sizes for read operation.
1797 */
1798 usbvision->stretch_width = 1;
1799 usbvision->stretch_height = 1;
1800 usbvision->frame[i].width = usbvision->curwidth;
1801 usbvision->frame[i].height = usbvision->curheight;
1802 usbvision->frame[i].bytes_read = 0;
1803 }
1804 PDEBUG(DBG_FUNC, "allocated %d frames (%d bytes per frame)",
1805 usbvision->num_frames, usbvision->max_frame_size);
1806 return usbvision->num_frames;
1807 }
1808
1809 /*
1810 * usbvision_frames_free
1811 * frees memory allocated for the frames
1812 */
1813 void usbvision_frames_free(struct usb_usbvision *usbvision)
1814 {
1815 /* Have to free all that memory */
1816 PDEBUG(DBG_FUNC, "free %d frames", usbvision->num_frames);
1817
1818 if (usbvision->fbuf != NULL) {
1819 usbvision_rvfree(usbvision->fbuf, usbvision->fbuf_size);
1820 usbvision->fbuf = NULL;
1821
1822 usbvision->num_frames = 0;
1823 }
1824 }
1825 /*
1826 * usbvision_empty_framequeues()
1827 * prepare queues for incoming and outgoing frames
1828 */
1829 void usbvision_empty_framequeues(struct usb_usbvision *usbvision)
1830 {
1831 u32 i;
1832
1833 INIT_LIST_HEAD(&(usbvision->inqueue));
1834 INIT_LIST_HEAD(&(usbvision->outqueue));
1835
1836 for (i = 0; i < USBVISION_NUMFRAMES; i++) {
1837 usbvision->frame[i].grabstate = frame_state_unused;
1838 usbvision->frame[i].bytes_read = 0;
1839 }
1840 }
1841
1842 /*
1843 * usbvision_stream_interrupt()
1844 * stops streaming
1845 */
1846 int usbvision_stream_interrupt(struct usb_usbvision *usbvision)
1847 {
1848 int ret = 0;
1849
1850 /* stop reading from the device */
1851
1852 usbvision->streaming = stream_interrupt;
1853 ret = wait_event_timeout(usbvision->wait_stream,
1854 (usbvision->streaming == stream_idle),
1855 msecs_to_jiffies(USBVISION_NUMSBUF*USBVISION_URB_FRAMES));
1856 return ret;
1857 }
1858
1859 /*
1860 * usbvision_set_compress_params()
1861 *
1862 */
1863
1864 static int usbvision_set_compress_params(struct usb_usbvision *usbvision)
1865 {
1866 static const char proc[] = "usbvision_set_compresion_params: ";
1867 int rc;
1868 unsigned char *value = usbvision->ctrl_urb_buffer;
1869
1870 value[0] = 0x0F; /* Intra-Compression cycle */
1871 value[1] = 0x01; /* Reg.45 one line per strip */
1872 value[2] = 0x00; /* Reg.46 Force intra mode on all new frames */
1873 value[3] = 0x00; /* Reg.47 FORCE_UP <- 0 normal operation (not force) */
1874 value[4] = 0xA2; /* Reg.48 BUF_THR I'm not sure if this does something in not compressed mode. */
1875 value[5] = 0x00; /* Reg.49 DVI_YUV This has nothing to do with compression */
1876
1877 /* catched values for NT1004 */
1878 /* value[0] = 0xFF; Never apply intra mode automatically */
1879 /* value[1] = 0xF1; Use full frame height for virtual strip width; One line per strip */
1880 /* value[2] = 0x01; Force intra mode on all new frames */
1881 /* value[3] = 0x00; Strip size 400 Bytes; do not force up */
1882 /* value[4] = 0xA2; */
1883 if (!USBVISION_IS_OPERATIONAL(usbvision))
1884 return 0;
1885
1886 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1887 USBVISION_OP_CODE,
1888 USB_DIR_OUT | USB_TYPE_VENDOR |
1889 USB_RECIP_ENDPOINT, 0,
1890 (__u16) USBVISION_INTRA_CYC, value, 5, HZ);
1891
1892 if (rc < 0) {
1893 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - reconnect or reload driver.\n",
1894 proc, rc);
1895 return rc;
1896 }
1897
1898 if (usbvision->bridge_type == BRIDGE_NT1004) {
1899 value[0] = 20; /* PCM Threshold 1 */
1900 value[1] = 12; /* PCM Threshold 2 */
1901 value[2] = 255; /* Distortion Threshold inter */
1902 value[3] = 255; /* Distortion Threshold intra */
1903 value[4] = 43; /* Max Distortion inter */
1904 value[5] = 43; /* Max Distortion intra */
1905 } else {
1906 value[0] = 20; /* PCM Threshold 1 */
1907 value[1] = 12; /* PCM Threshold 2 */
1908 value[2] = 255; /* Distortion Threshold d7-d0 */
1909 value[3] = 0; /* Distortion Threshold d11-d8 */
1910 value[4] = 43; /* Max Distortion d7-d0 */
1911 value[5] = 0; /* Max Distortion d8 */
1912 }
1913
1914 if (!USBVISION_IS_OPERATIONAL(usbvision))
1915 return 0;
1916
1917 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1918 USBVISION_OP_CODE,
1919 USB_DIR_OUT | USB_TYPE_VENDOR |
1920 USB_RECIP_ENDPOINT, 0,
1921 (__u16) USBVISION_PCM_THR1, value, 6, HZ);
1922
1923 if (rc < 0) {
1924 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - reconnect or reload driver.\n",
1925 proc, rc);
1926 }
1927 return rc;
1928 }
1929
1930
1931 /*
1932 * usbvision_set_input()
1933 *
1934 * Set the input (saa711x, ...) size x y and other misc input params
1935 * I've no idea if this parameters are right
1936 *
1937 */
1938 int usbvision_set_input(struct usb_usbvision *usbvision)
1939 {
1940 static const char proc[] = "usbvision_set_input: ";
1941 int rc;
1942 unsigned char *value = usbvision->ctrl_urb_buffer;
1943 unsigned char dvi_yuv_value;
1944
1945 if (!USBVISION_IS_OPERATIONAL(usbvision))
1946 return 0;
1947
1948 /* Set input format expected from decoder*/
1949 if (usbvision_device_data[usbvision->dev_model].vin_reg1_override) {
1950 value[0] = usbvision_device_data[usbvision->dev_model].vin_reg1;
1951 } else if (usbvision_device_data[usbvision->dev_model].codec == CODEC_SAA7113) {
1952 /* SAA7113 uses 8 bit output */
1953 value[0] = USBVISION_8_422_SYNC;
1954 } else {
1955 /* I'm sure only about d2-d0 [010] 16 bit 4:2:2 usin sync pulses
1956 * as that is how saa7111 is configured */
1957 value[0] = USBVISION_16_422_SYNC;
1958 /* | USBVISION_VSNC_POL | USBVISION_VCLK_POL);*/
1959 }
1960
1961 rc = usbvision_write_reg(usbvision, USBVISION_VIN_REG1, value[0]);
1962 if (rc < 0) {
1963 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - reconnect or reload driver.\n",
1964 proc, rc);
1965 return rc;
1966 }
1967
1968
1969 if (usbvision->tvnorm_id & V4L2_STD_PAL) {
1970 value[0] = 0xC0;
1971 value[1] = 0x02; /* 0x02C0 -> 704 Input video line length */
1972 value[2] = 0x20;
1973 value[3] = 0x01; /* 0x0120 -> 288 Input video n. of lines */
1974 value[4] = 0x60;
1975 value[5] = 0x00; /* 0x0060 -> 96 Input video h offset */
1976 value[6] = 0x16;
1977 value[7] = 0x00; /* 0x0016 -> 22 Input video v offset */
1978 } else if (usbvision->tvnorm_id & V4L2_STD_SECAM) {
1979 value[0] = 0xC0;
1980 value[1] = 0x02; /* 0x02C0 -> 704 Input video line length */
1981 value[2] = 0x20;
1982 value[3] = 0x01; /* 0x0120 -> 288 Input video n. of lines */
1983 value[4] = 0x01;
1984 value[5] = 0x00; /* 0x0001 -> 01 Input video h offset */
1985 value[6] = 0x01;
1986 value[7] = 0x00; /* 0x0001 -> 01 Input video v offset */
1987 } else { /* V4L2_STD_NTSC */
1988 value[0] = 0xD0;
1989 value[1] = 0x02; /* 0x02D0 -> 720 Input video line length */
1990 value[2] = 0xF0;
1991 value[3] = 0x00; /* 0x00F0 -> 240 Input video number of lines */
1992 value[4] = 0x50;
1993 value[5] = 0x00; /* 0x0050 -> 80 Input video h offset */
1994 value[6] = 0x10;
1995 value[7] = 0x00; /* 0x0010 -> 16 Input video v offset */
1996 }
1997
1998 /* webcam is only 480 pixels wide, both PAL and NTSC version */
1999 if (usbvision_device_data[usbvision->dev_model].codec == CODEC_WEBCAM) {
2000 value[0] = 0xe0;
2001 value[1] = 0x01; /* 0x01E0 -> 480 Input video line length */
2002 }
2003
2004 if (usbvision_device_data[usbvision->dev_model].x_offset >= 0) {
2005 value[4] = usbvision_device_data[usbvision->dev_model].x_offset & 0xff;
2006 value[5] = (usbvision_device_data[usbvision->dev_model].x_offset & 0x0300) >> 8;
2007 }
2008
2009 if (adjust_x_offset != -1) {
2010 value[4] = adjust_x_offset & 0xff;
2011 value[5] = (adjust_x_offset & 0x0300) >> 8;
2012 }
2013
2014 if (usbvision_device_data[usbvision->dev_model].y_offset >= 0) {
2015 value[6] = usbvision_device_data[usbvision->dev_model].y_offset & 0xff;
2016 value[7] = (usbvision_device_data[usbvision->dev_model].y_offset & 0x0300) >> 8;
2017 }
2018
2019 if (adjust_y_offset != -1) {
2020 value[6] = adjust_y_offset & 0xff;
2021 value[7] = (adjust_y_offset & 0x0300) >> 8;
2022 }
2023
2024 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2025 USBVISION_OP_CODE, /* USBVISION specific code */
2026 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0,
2027 (__u16) USBVISION_LXSIZE_I, value, 8, HZ);
2028 if (rc < 0) {
2029 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - reconnect or reload driver.\n",
2030 proc, rc);
2031 return rc;
2032 }
2033
2034
2035 dvi_yuv_value = 0x00; /* U comes after V, Ya comes after U/V, Yb comes after Yb */
2036
2037 if (usbvision_device_data[usbvision->dev_model].dvi_yuv_override) {
2038 dvi_yuv_value = usbvision_device_data[usbvision->dev_model].dvi_yuv;
2039 } else if (usbvision_device_data[usbvision->dev_model].codec == CODEC_SAA7113) {
2040 /* This changes as the fine sync control changes. Further investigation necessary */
2041 dvi_yuv_value = 0x06;
2042 }
2043
2044 return usbvision_write_reg(usbvision, USBVISION_DVI_YUV, dvi_yuv_value);
2045 }
2046
2047
2048 /*
2049 * usbvision_set_dram_settings()
2050 *
2051 * Set the buffer address needed by the usbvision dram to operate
2052 * This values has been taken with usbsnoop.
2053 *
2054 */
2055
2056 static int usbvision_set_dram_settings(struct usb_usbvision *usbvision)
2057 {
2058 unsigned char *value = usbvision->ctrl_urb_buffer;
2059 int rc;
2060
2061 if (usbvision->isoc_mode == ISOC_MODE_COMPRESS) {
2062 value[0] = 0x42;
2063 value[1] = 0x71;
2064 value[2] = 0xff;
2065 value[3] = 0x00;
2066 value[4] = 0x98;
2067 value[5] = 0xe0;
2068 value[6] = 0x71;
2069 value[7] = 0xff;
2070 /* UR: 0x0E200-0x3FFFF = 204288 Words (1 Word = 2 Byte) */
2071 /* FDL: 0x00000-0x0E099 = 57498 Words */
2072 /* VDW: 0x0E3FF-0x3FFFF */
2073 } else {
2074 value[0] = 0x42;
2075 value[1] = 0x00;
2076 value[2] = 0xff;
2077 value[3] = 0x00;
2078 value[4] = 0x00;
2079 value[5] = 0x00;
2080 value[6] = 0x00;
2081 value[7] = 0xff;
2082 }
2083 /* These are the values of the address of the video buffer,
2084 * they have to be loaded into the USBVISION_DRM_PRM1-8
2085 *
2086 * Start address of video output buffer for read: drm_prm1-2 -> 0x00000
2087 * End address of video output buffer for read: drm_prm1-3 -> 0x1ffff
2088 * Start address of video frame delay buffer: drm_prm1-4 -> 0x20000
2089 * Only used in compressed mode
2090 * End address of video frame delay buffer: drm_prm1-5-6 -> 0x3ffff
2091 * Only used in compressed mode
2092 * Start address of video output buffer for write: drm_prm1-7 -> 0x00000
2093 * End address of video output buffer for write: drm_prm1-8 -> 0x1ffff
2094 */
2095
2096 if (!USBVISION_IS_OPERATIONAL(usbvision))
2097 return 0;
2098
2099 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2100 USBVISION_OP_CODE, /* USBVISION specific code */
2101 USB_DIR_OUT | USB_TYPE_VENDOR |
2102 USB_RECIP_ENDPOINT, 0,
2103 (__u16) USBVISION_DRM_PRM1, value, 8, HZ);
2104
2105 if (rc < 0) {
2106 dev_err(&usbvision->dev->dev, "%s: ERROR=%d\n", __func__, rc);
2107 return rc;
2108 }
2109
2110 /* Restart the video buffer logic */
2111 rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, USBVISION_RES_UR |
2112 USBVISION_RES_FDL | USBVISION_RES_VDW);
2113 if (rc < 0)
2114 return rc;
2115 rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, 0x00);
2116
2117 return rc;
2118 }
2119
2120 /*
2121 * ()
2122 *
2123 * Power on the device, enables suspend-resume logic
2124 * & reset the isoc End-Point
2125 *
2126 */
2127
2128 int usbvision_power_on(struct usb_usbvision *usbvision)
2129 {
2130 int err_code = 0;
2131
2132 PDEBUG(DBG_FUNC, "");
2133
2134 usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
2135 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2136 USBVISION_SSPND_EN | USBVISION_RES2);
2137
2138 if (usbvision_device_data[usbvision->dev_model].codec == CODEC_WEBCAM) {
2139 usbvision_write_reg(usbvision, USBVISION_VIN_REG1,
2140 USBVISION_16_422_SYNC | USBVISION_HVALID_PO);
2141 usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
2142 USBVISION_NOHVALID | USBVISION_KEEP_BLANK);
2143 }
2144 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2145 USBVISION_SSPND_EN | USBVISION_PWR_VID);
2146 mdelay(10);
2147 err_code = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2148 USBVISION_SSPND_EN | USBVISION_PWR_VID | USBVISION_RES2);
2149 if (err_code == 1)
2150 usbvision->power = 1;
2151 PDEBUG(DBG_FUNC, "%s: err_code %d", (err_code < 0) ? "ERROR" : "power is on", err_code);
2152 return err_code;
2153 }
2154
2155
2156 /*
2157 * usbvision_begin_streaming()
2158 * Sure you have to put bit 7 to 0, if not incoming frames are droped, but no
2159 * idea about the rest
2160 */
2161 int usbvision_begin_streaming(struct usb_usbvision *usbvision)
2162 {
2163 if (usbvision->isoc_mode == ISOC_MODE_COMPRESS)
2164 usbvision_init_compression(usbvision);
2165 return usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
2166 USBVISION_NOHVALID | usbvision->vin_reg2_preset);
2167 }
2168
2169 /*
2170 * usbvision_restart_isoc()
2171 * Not sure yet if touching here PWR_REG make loose the config
2172 */
2173
2174 int usbvision_restart_isoc(struct usb_usbvision *usbvision)
2175 {
2176 int ret;
2177
2178 ret = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2179 USBVISION_SSPND_EN | USBVISION_PWR_VID);
2180 if (ret < 0)
2181 return ret;
2182 ret = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2183 USBVISION_SSPND_EN | USBVISION_PWR_VID |
2184 USBVISION_RES2);
2185 if (ret < 0)
2186 return ret;
2187 ret = usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
2188 USBVISION_KEEP_BLANK | USBVISION_NOHVALID |
2189 usbvision->vin_reg2_preset);
2190 if (ret < 0)
2191 return ret;
2192
2193 /* TODO: schedule timeout */
2194 while ((usbvision_read_reg(usbvision, USBVISION_STATUS_REG) & 0x01) != 1)
2195 ;
2196
2197 return 0;
2198 }
2199
2200 int usbvision_audio_off(struct usb_usbvision *usbvision)
2201 {
2202 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, USBVISION_AUDIO_MUTE) < 0) {
2203 printk(KERN_ERR "usbvision_audio_off: can't write reg\n");
2204 return -1;
2205 }
2206 usbvision->audio_mute = 0;
2207 usbvision->audio_channel = USBVISION_AUDIO_MUTE;
2208 return 0;
2209 }
2210
2211 int usbvision_set_audio(struct usb_usbvision *usbvision, int audio_channel)
2212 {
2213 if (!usbvision->audio_mute) {
2214 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, audio_channel) < 0) {
2215 printk(KERN_ERR "usbvision_set_audio: can't write iopin register for audio switching\n");
2216 return -1;
2217 }
2218 }
2219 usbvision->audio_channel = audio_channel;
2220 return 0;
2221 }
2222
2223 int usbvision_setup(struct usb_usbvision *usbvision, int format)
2224 {
2225 if (usbvision_device_data[usbvision->dev_model].codec == CODEC_WEBCAM)
2226 usbvision_init_webcam(usbvision);
2227 usbvision_set_video_format(usbvision, format);
2228 usbvision_set_dram_settings(usbvision);
2229 usbvision_set_compress_params(usbvision);
2230 usbvision_set_input(usbvision);
2231 usbvision_set_output(usbvision, MAX_USB_WIDTH, MAX_USB_HEIGHT);
2232 usbvision_restart_isoc(usbvision);
2233
2234 /* cosas del PCM */
2235 return USBVISION_IS_OPERATIONAL(usbvision);
2236 }
2237
2238 int usbvision_set_alternate(struct usb_usbvision *dev)
2239 {
2240 int err_code, prev_alt = dev->iface_alt;
2241 int i;
2242
2243 dev->iface_alt = 0;
2244 for (i = 0; i < dev->num_alt; i++)
2245 if (dev->alt_max_pkt_size[i] > dev->alt_max_pkt_size[dev->iface_alt])
2246 dev->iface_alt = i;
2247
2248 if (dev->iface_alt != prev_alt) {
2249 dev->isoc_packet_size = dev->alt_max_pkt_size[dev->iface_alt];
2250 PDEBUG(DBG_FUNC, "setting alternate %d with max_packet_size=%u",
2251 dev->iface_alt, dev->isoc_packet_size);
2252 err_code = usb_set_interface(dev->dev, dev->iface, dev->iface_alt);
2253 if (err_code < 0) {
2254 dev_err(&dev->dev->dev,
2255 "cannot change alternate number to %d (error=%i)\n",
2256 dev->iface_alt, err_code);
2257 return err_code;
2258 }
2259 }
2260
2261 PDEBUG(DBG_ISOC, "ISO Packet Length:%d", dev->isoc_packet_size);
2262
2263 return 0;
2264 }
2265
2266 /*
2267 * usbvision_init_isoc()
2268 *
2269 */
2270 int usbvision_init_isoc(struct usb_usbvision *usbvision)
2271 {
2272 struct usb_device *dev = usbvision->dev;
2273 int buf_idx, err_code, reg_value;
2274 int sb_size;
2275
2276 if (!USBVISION_IS_OPERATIONAL(usbvision))
2277 return -EFAULT;
2278
2279 usbvision->cur_frame = NULL;
2280 scratch_reset(usbvision);
2281
2282 /* Alternate interface 1 is is the biggest frame size */
2283 err_code = usbvision_set_alternate(usbvision);
2284 if (err_code < 0) {
2285 usbvision->last_error = err_code;
2286 return -EBUSY;
2287 }
2288 sb_size = USBVISION_URB_FRAMES * usbvision->isoc_packet_size;
2289
2290 reg_value = (16 - usbvision_read_reg(usbvision,
2291 USBVISION_ALTER_REG)) & 0x0F;
2292
2293 usbvision->usb_bandwidth = reg_value >> 1;
2294 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec",
2295 usbvision->usb_bandwidth);
2296
2297
2298
2299 /* We double buffer the Iso lists */
2300
2301 for (buf_idx = 0; buf_idx < USBVISION_NUMSBUF; buf_idx++) {
2302 int j, k;
2303 struct urb *urb;
2304
2305 urb = usb_alloc_urb(USBVISION_URB_FRAMES, GFP_KERNEL);
2306 if (urb == NULL)
2307 return -ENOMEM;
2308 usbvision->sbuf[buf_idx].urb = urb;
2309 usbvision->sbuf[buf_idx].data =
2310 usb_alloc_coherent(usbvision->dev,
2311 sb_size,
2312 GFP_KERNEL,
2313 &urb->transfer_dma);
2314 urb->dev = dev;
2315 urb->context = usbvision;
2316 urb->pipe = usb_rcvisocpipe(dev, usbvision->video_endp);
2317 urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
2318 urb->interval = 1;
2319 urb->transfer_buffer = usbvision->sbuf[buf_idx].data;
2320 urb->complete = usbvision_isoc_irq;
2321 urb->number_of_packets = USBVISION_URB_FRAMES;
2322 urb->transfer_buffer_length =
2323 usbvision->isoc_packet_size * USBVISION_URB_FRAMES;
2324 for (j = k = 0; j < USBVISION_URB_FRAMES; j++,
2325 k += usbvision->isoc_packet_size) {
2326 urb->iso_frame_desc[j].offset = k;
2327 urb->iso_frame_desc[j].length =
2328 usbvision->isoc_packet_size;
2329 }
2330 }
2331
2332 /* Submit all URBs */
2333 for (buf_idx = 0; buf_idx < USBVISION_NUMSBUF; buf_idx++) {
2334 err_code = usb_submit_urb(usbvision->sbuf[buf_idx].urb,
2335 GFP_KERNEL);
2336 if (err_code) {
2337 dev_err(&usbvision->dev->dev,
2338 "%s: usb_submit_urb(%d) failed: error %d\n",
2339 __func__, buf_idx, err_code);
2340 }
2341 }
2342
2343 usbvision->streaming = stream_idle;
2344 PDEBUG(DBG_ISOC, "%s: streaming=1 usbvision->video_endp=$%02x",
2345 __func__,
2346 usbvision->video_endp);
2347 return 0;
2348 }
2349
2350 /*
2351 * usbvision_stop_isoc()
2352 *
2353 * This procedure stops streaming and deallocates URBs. Then it
2354 * activates zero-bandwidth alt. setting of the video interface.
2355 *
2356 */
2357 void usbvision_stop_isoc(struct usb_usbvision *usbvision)
2358 {
2359 int buf_idx, err_code, reg_value;
2360 int sb_size = USBVISION_URB_FRAMES * usbvision->isoc_packet_size;
2361
2362 if ((usbvision->streaming == stream_off) || (usbvision->dev == NULL))
2363 return;
2364
2365 /* Unschedule all of the iso td's */
2366 for (buf_idx = 0; buf_idx < USBVISION_NUMSBUF; buf_idx++) {
2367 usb_kill_urb(usbvision->sbuf[buf_idx].urb);
2368 if (usbvision->sbuf[buf_idx].data) {
2369 usb_free_coherent(usbvision->dev,
2370 sb_size,
2371 usbvision->sbuf[buf_idx].data,
2372 usbvision->sbuf[buf_idx].urb->transfer_dma);
2373 }
2374 usb_free_urb(usbvision->sbuf[buf_idx].urb);
2375 usbvision->sbuf[buf_idx].urb = NULL;
2376 }
2377
2378 PDEBUG(DBG_ISOC, "%s: streaming=stream_off\n", __func__);
2379 usbvision->streaming = stream_off;
2380
2381 if (!usbvision->remove_pending) {
2382 /* Set packet size to 0 */
2383 usbvision->iface_alt = 0;
2384 err_code = usb_set_interface(usbvision->dev, usbvision->iface,
2385 usbvision->iface_alt);
2386 if (err_code < 0) {
2387 dev_err(&usbvision->dev->dev,
2388 "%s: usb_set_interface() failed: error %d\n",
2389 __func__, err_code);
2390 usbvision->last_error = err_code;
2391 }
2392 reg_value = (16-usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F;
2393 usbvision->isoc_packet_size =
2394 (reg_value == 0) ? 0 : (reg_value * 64) - 1;
2395 PDEBUG(DBG_ISOC, "ISO Packet Length:%d",
2396 usbvision->isoc_packet_size);
2397
2398 usbvision->usb_bandwidth = reg_value >> 1;
2399 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec",
2400 usbvision->usb_bandwidth);
2401 }
2402 }
2403
2404 int usbvision_muxsel(struct usb_usbvision *usbvision, int channel)
2405 {
2406 /* inputs #0 and #3 are constant for every SAA711x. */
2407 /* inputs #1 and #2 are variable for SAA7111 and SAA7113 */
2408 int mode[4] = { SAA7115_COMPOSITE0, 0, 0, SAA7115_COMPOSITE3 };
2409 int audio[] = { 1, 0, 0, 0 };
2410 /* channel 0 is TV with audiochannel 1 (tuner mono) */
2411 /* channel 1 is Composite with audio channel 0 (line in) */
2412 /* channel 2 is S-Video with audio channel 0 (line in) */
2413 /* channel 3 is additional video inputs to the device with audio channel 0 (line in) */
2414
2415 RESTRICT_TO_RANGE(channel, 0, usbvision->video_inputs);
2416 usbvision->ctl_input = channel;
2417
2418 /* set the new channel */
2419 /* Regular USB TV Tuners -> channel: 0 = Television, 1 = Composite, 2 = S-Video */
2420 /* Four video input devices -> channel: 0 = Chan White, 1 = Chan Green, 2 = Chan Yellow, 3 = Chan Red */
2421
2422 switch (usbvision_device_data[usbvision->dev_model].codec) {
2423 case CODEC_SAA7113:
2424 mode[1] = SAA7115_COMPOSITE2;
2425 if (switch_svideo_input) {
2426 /* To handle problems with S-Video Input for
2427 * some devices. Use switch_svideo_input
2428 * parameter when loading the module.*/
2429 mode[2] = SAA7115_COMPOSITE1;
2430 } else {
2431 mode[2] = SAA7115_SVIDEO1;
2432 }
2433 break;
2434 case CODEC_SAA7111:
2435 default:
2436 /* modes for saa7111 */
2437 mode[1] = SAA7115_COMPOSITE1;
2438 mode[2] = SAA7115_SVIDEO1;
2439 break;
2440 }
2441 call_all(usbvision, video, s_routing, mode[channel], 0, 0);
2442 usbvision_set_audio(usbvision, audio[channel]);
2443 return 0;
2444 }
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