?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / media / usb / usbvision / usbvision-core.c
blobf05a5c84dc188f74891ee2f75249cbea864e5e86
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * usbvision-core.c - driver for NT100x USB video capture devices
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
12 #include <linux/kernel.h>
13 #include <linux/list.h>
14 #include <linux/timer.h>
15 #include <linux/gfp.h>
16 #include <linux/mm.h>
17 #include <linux/highmem.h>
18 #include <linux/vmalloc.h>
19 #include <linux/module.h>
20 #include <linux/init.h>
21 #include <linux/spinlock.h>
22 #include <linux/io.h>
23 #include <linux/videodev2.h>
24 #include <linux/i2c.h>
25
26 #include <media/i2c/saa7115.h>
27 #include <media/v4l2-common.h>
28 #include <media/tuner.h>
29
30 #include <linux/workqueue.h>
31
32 #include "usbvision.h"
33
34 static unsigned int core_debug;
35 module_param(core_debug, int, 0644);
36 MODULE_PARM_DESC(core_debug, "enable debug messages [core]");
37
38 static int adjust_compression = 1; /* Set the compression to be adaptive */
39 module_param(adjust_compression, int, 0444);
40 MODULE_PARM_DESC(adjust_compression, " Set the ADPCM compression for the device. Default: 1 (On)");
41
42 /* To help people with Black and White output with using s-video input.
43 * Some cables and input device are wired differently. */
44 static int switch_svideo_input;
45 module_param(switch_svideo_input, int, 0444);
46 MODULE_PARM_DESC(switch_svideo_input, " Set the S-Video input. Some cables and input device are wired differently. Default: 0 (Off)");
47
48 static unsigned int adjust_x_offset = -1;
49 module_param(adjust_x_offset, int, 0644);
50 MODULE_PARM_DESC(adjust_x_offset, "adjust X offset display [core]");
51
52 static unsigned int adjust_y_offset = -1;
53 module_param(adjust_y_offset, int, 0644);
54 MODULE_PARM_DESC(adjust_y_offset, "adjust Y offset display [core]");
55
56
57 #define ENABLE_HEXDUMP 0 /* Enable if you need it */
58
59
60 #ifdef USBVISION_DEBUG
61 #define PDEBUG(level, fmt, args...) { \
62 if (core_debug & (level)) \
63 printk(KERN_INFO KBUILD_MODNAME ":[%s:%d] " fmt, \
64 __func__, __LINE__ , ## args); \
65 }
66 #else
67 #define PDEBUG(level, fmt, args...) do {} while (0)
68 #endif
69
70 #define DBG_HEADER (1 << 0)
71 #define DBG_IRQ (1 << 1)
72 #define DBG_ISOC (1 << 2)
73 #define DBG_PARSE (1 << 3)
74 #define DBG_SCRATCH (1 << 4)
75 #define DBG_FUNC (1 << 5)
76
77 /* The value of 'scratch_buf_size' affects quality of the picture
78 * in many ways. Shorter buffers may cause loss of data when client
79 * is too slow. Larger buffers are memory-consuming and take longer
80 * to work with. This setting can be adjusted, but the default value
81 * should be OK for most desktop users.
82 */
83 #define DEFAULT_SCRATCH_BUF_SIZE (0x20000) /* 128kB memory scratch buffer */
84 static const int scratch_buf_size = DEFAULT_SCRATCH_BUF_SIZE;
85
86 /* Function prototypes */
87 static int usbvision_request_intra(struct usb_usbvision *usbvision);
88 static int usbvision_unrequest_intra(struct usb_usbvision *usbvision);
89 static int usbvision_adjust_compression(struct usb_usbvision *usbvision);
90 static int usbvision_measure_bandwidth(struct usb_usbvision *usbvision);
91
92 /*******************************/
93 /* Memory management functions */
94 /*******************************/
95
96 /*
97 * Here we want the physical address of the memory.
98 * This is used when initializing the contents of the area.
99 */
100
101 static void *usbvision_rvmalloc(unsigned long size)
102 {
103 void *mem;
104 unsigned long adr;
105
106 size = PAGE_ALIGN(size);
107 mem = vmalloc_32(size);
108 if (!mem)
109 return NULL;
110
111 memset(mem, 0, size); /* Clear the ram out, no junk to the user */
112 adr = (unsigned long) mem;
113 while (size > 0) {
114 SetPageReserved(vmalloc_to_page((void *)adr));
115 adr += PAGE_SIZE;
116 size -= PAGE_SIZE;
117 }
118
119 return mem;
120 }
121
122 static void usbvision_rvfree(void *mem, unsigned long size)
123 {
124 unsigned long adr;
125
126 if (!mem)
127 return;
128
129 size = PAGE_ALIGN(size);
130
131 adr = (unsigned long) mem;
132 while ((long) size > 0) {
133 ClearPageReserved(vmalloc_to_page((void *)adr));
134 adr += PAGE_SIZE;
135 size -= PAGE_SIZE;
136 }
137
138 vfree(mem);
139 }
140
141
142 #if ENABLE_HEXDUMP
143 static void usbvision_hexdump(const unsigned char *data, int len)
144 {
145 char tmp[80];
146 int i, k;
147
148 for (i = k = 0; len > 0; i++, len--) {
149 if (i > 0 && (i % 16 == 0)) {
150 printk("%s\n", tmp);
151 k = 0;
152 }
153 k += sprintf(&tmp[k], "%02x ", data[i]);
154 }
155 if (k > 0)
156 printk(KERN_CONT "%s\n", tmp);
157 }
158 #endif
159
160 /********************************
161 * scratch ring buffer handling
162 ********************************/
163 static int scratch_len(struct usb_usbvision *usbvision) /* This returns the amount of data actually in the buffer */
164 {
165 int len = usbvision->scratch_write_ptr - usbvision->scratch_read_ptr;
166
167 if (len < 0)
168 len += scratch_buf_size;
169 PDEBUG(DBG_SCRATCH, "scratch_len() = %d\n", len);
170
171 return len;
172 }
173
174
175 /* This returns the free space left in the buffer */
176 static int scratch_free(struct usb_usbvision *usbvision)
177 {
178 int free = usbvision->scratch_read_ptr - usbvision->scratch_write_ptr;
179 if (free <= 0)
180 free += scratch_buf_size;
181 if (free) {
182 free -= 1; /* at least one byte in the buffer must */
183 /* left blank, otherwise there is no chance to differ between full and empty */
184 }
185 PDEBUG(DBG_SCRATCH, "return %d\n", free);
186
187 return free;
188 }
189
190
191 /* This puts data into the buffer */
192 static int scratch_put(struct usb_usbvision *usbvision, unsigned char *data,
193 int len)
194 {
195 int len_part;
196
197 if (usbvision->scratch_write_ptr + len < scratch_buf_size) {
198 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len);
199 usbvision->scratch_write_ptr += len;
200 } else {
201 len_part = scratch_buf_size - usbvision->scratch_write_ptr;
202 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len_part);
203 if (len == len_part) {
204 usbvision->scratch_write_ptr = 0; /* just set write_ptr to zero */
205 } else {
206 memcpy(usbvision->scratch, data + len_part, len - len_part);
207 usbvision->scratch_write_ptr = len - len_part;
208 }
209 }
210
211 PDEBUG(DBG_SCRATCH, "len=%d, new write_ptr=%d\n", len, usbvision->scratch_write_ptr);
212
213 return len;
214 }
215
216 /* This marks the write_ptr as position of new frame header */
217 static void scratch_mark_header(struct usb_usbvision *usbvision)
218 {
219 PDEBUG(DBG_SCRATCH, "header at write_ptr=%d\n", usbvision->scratch_headermarker_write_ptr);
220
221 usbvision->scratch_headermarker[usbvision->scratch_headermarker_write_ptr] =
222 usbvision->scratch_write_ptr;
223 usbvision->scratch_headermarker_write_ptr += 1;
224 usbvision->scratch_headermarker_write_ptr %= USBVISION_NUM_HEADERMARKER;
225 }
226
227 /* This gets data from the buffer at the given "ptr" position */
228 static int scratch_get_extra(struct usb_usbvision *usbvision,
229 unsigned char *data, int *ptr, int len)
230 {
231 int len_part;
232
233 if (*ptr + len < scratch_buf_size) {
234 memcpy(data, usbvision->scratch + *ptr, len);
235 *ptr += len;
236 } else {
237 len_part = scratch_buf_size - *ptr;
238 memcpy(data, usbvision->scratch + *ptr, len_part);
239 if (len == len_part) {
240 *ptr = 0; /* just set the y_ptr to zero */
241 } else {
242 memcpy(data + len_part, usbvision->scratch, len - len_part);
243 *ptr = len - len_part;
244 }
245 }
246
247 PDEBUG(DBG_SCRATCH, "len=%d, new ptr=%d\n", len, *ptr);
248
249 return len;
250 }
251
252
253 /* This sets the scratch extra read pointer */
254 static void scratch_set_extra_ptr(struct usb_usbvision *usbvision, int *ptr,
255 int len)
256 {
257 *ptr = (usbvision->scratch_read_ptr + len) % scratch_buf_size;
258
259 PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
260 }
261
262
263 /* This increments the scratch extra read pointer */
264 static void scratch_inc_extra_ptr(int *ptr, int len)
265 {
266 *ptr = (*ptr + len) % scratch_buf_size;
267
268 PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
269 }
270
271
272 /* This gets data from the buffer */
273 static int scratch_get(struct usb_usbvision *usbvision, unsigned char *data,
274 int len)
275 {
276 int len_part;
277
278 if (usbvision->scratch_read_ptr + len < scratch_buf_size) {
279 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len);
280 usbvision->scratch_read_ptr += len;
281 } else {
282 len_part = scratch_buf_size - usbvision->scratch_read_ptr;
283 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len_part);
284 if (len == len_part) {
285 usbvision->scratch_read_ptr = 0; /* just set the read_ptr to zero */
286 } else {
287 memcpy(data + len_part, usbvision->scratch, len - len_part);
288 usbvision->scratch_read_ptr = len - len_part;
289 }
290 }
291
292 PDEBUG(DBG_SCRATCH, "len=%d, new read_ptr=%d\n", len, usbvision->scratch_read_ptr);
293
294 return len;
295 }
296
297
298 /* This sets read pointer to next header and returns it */
299 static int scratch_get_header(struct usb_usbvision *usbvision,
300 struct usbvision_frame_header *header)
301 {
302 int err_code = 0;
303
304 PDEBUG(DBG_SCRATCH, "from read_ptr=%d", usbvision->scratch_headermarker_read_ptr);
305
306 while (usbvision->scratch_headermarker_write_ptr -
307 usbvision->scratch_headermarker_read_ptr != 0) {
308 usbvision->scratch_read_ptr =
309 usbvision->scratch_headermarker[usbvision->scratch_headermarker_read_ptr];
310 usbvision->scratch_headermarker_read_ptr += 1;
311 usbvision->scratch_headermarker_read_ptr %= USBVISION_NUM_HEADERMARKER;
312 scratch_get(usbvision, (unsigned char *)header, USBVISION_HEADER_LENGTH);
313 if ((header->magic_1 == USBVISION_MAGIC_1)
314 && (header->magic_2 == USBVISION_MAGIC_2)
315 && (header->header_length == USBVISION_HEADER_LENGTH)) {
316 err_code = USBVISION_HEADER_LENGTH;
317 header->frame_width = header->frame_width_lo + (header->frame_width_hi << 8);
318 header->frame_height = header->frame_height_lo + (header->frame_height_hi << 8);
319 break;
320 }
321 }
322
323 return err_code;
324 }
325
326
327 /* This removes len bytes of old data from the buffer */
328 static void scratch_rm_old(struct usb_usbvision *usbvision, int len)
329 {
330 usbvision->scratch_read_ptr += len;
331 usbvision->scratch_read_ptr %= scratch_buf_size;
332 PDEBUG(DBG_SCRATCH, "read_ptr is now %d\n", usbvision->scratch_read_ptr);
333 }
334
335
336 /* This resets the buffer - kills all data in it too */
337 static void scratch_reset(struct usb_usbvision *usbvision)
338 {
339 PDEBUG(DBG_SCRATCH, "\n");
340
341 usbvision->scratch_read_ptr = 0;
342 usbvision->scratch_write_ptr = 0;
343 usbvision->scratch_headermarker_read_ptr = 0;
344 usbvision->scratch_headermarker_write_ptr = 0;
345 usbvision->isocstate = isoc_state_no_frame;
346 }
347
348 int usbvision_scratch_alloc(struct usb_usbvision *usbvision)
349 {
350 usbvision->scratch = vmalloc_32(scratch_buf_size);
351 scratch_reset(usbvision);
352 if (usbvision->scratch == NULL) {
353 dev_err(&usbvision->dev->dev,
354 "%s: unable to allocate %d bytes for scratch\n",
355 __func__, scratch_buf_size);
356 return -ENOMEM;
357 }
358 return 0;
359 }
360
361 void usbvision_scratch_free(struct usb_usbvision *usbvision)
362 {
363 vfree(usbvision->scratch);
364 usbvision->scratch = NULL;
365 }
366
367 /*
368 * usbvision_decompress_alloc()
369 *
370 * allocates intermediate buffer for decompression
371 */
372 int usbvision_decompress_alloc(struct usb_usbvision *usbvision)
373 {
374 int IFB_size = MAX_FRAME_WIDTH * MAX_FRAME_HEIGHT * 3 / 2;
375
376 usbvision->intra_frame_buffer = vmalloc_32(IFB_size);
377 if (usbvision->intra_frame_buffer == NULL) {
378 dev_err(&usbvision->dev->dev,
379 "%s: unable to allocate %d for compr. frame buffer\n",
380 __func__, IFB_size);
381 return -ENOMEM;
382 }
383 return 0;
384 }
385
386 /*
387 * usbvision_decompress_free()
388 *
389 * frees intermediate buffer for decompression
390 */
391 void usbvision_decompress_free(struct usb_usbvision *usbvision)
392 {
393 vfree(usbvision->intra_frame_buffer);
394 usbvision->intra_frame_buffer = NULL;
395
396 }
397
398 /************************************************************
399 * Here comes the data parsing stuff that is run as interrupt
400 ************************************************************/
401 /*
402 * usbvision_find_header()
403 *
404 * Locate one of supported header markers in the scratch buffer.
405 */
406 static enum parse_state usbvision_find_header(struct usb_usbvision *usbvision)
407 {
408 struct usbvision_frame *frame;
409 int found_header = 0;
410
411 frame = usbvision->cur_frame;
412
413 while (scratch_get_header(usbvision, &frame->isoc_header) == USBVISION_HEADER_LENGTH) {
414 /* found header in scratch */
415 PDEBUG(DBG_HEADER, "found header: 0x%02x%02x %d %d %d %d %#x 0x%02x %u %u",
416 frame->isoc_header.magic_2,
417 frame->isoc_header.magic_1,
418 frame->isoc_header.header_length,
419 frame->isoc_header.frame_num,
420 frame->isoc_header.frame_phase,
421 frame->isoc_header.frame_latency,
422 frame->isoc_header.data_format,
423 frame->isoc_header.format_param,
424 frame->isoc_header.frame_width,
425 frame->isoc_header.frame_height);
426
427 if (usbvision->request_intra) {
428 if (frame->isoc_header.format_param & 0x80) {
429 found_header = 1;
430 usbvision->last_isoc_frame_num = -1; /* do not check for lost frames this time */
431 usbvision_unrequest_intra(usbvision);
432 break;
433 }
434 } else {
435 found_header = 1;
436 break;
437 }
438 }
439
440 if (found_header) {
441 frame->frmwidth = frame->isoc_header.frame_width * usbvision->stretch_width;
442 frame->frmheight = frame->isoc_header.frame_height * usbvision->stretch_height;
443 frame->v4l2_linesize = (frame->frmwidth * frame->v4l2_format.depth) >> 3;
444 } else { /* no header found */
445 PDEBUG(DBG_HEADER, "skipping scratch data, no header");
446 scratch_reset(usbvision);
447 return parse_state_end_parse;
448 }
449
450 /* found header */
451 if (frame->isoc_header.data_format == ISOC_MODE_COMPRESS) {
452 /* check isoc_header.frame_num for lost frames */
453 if (usbvision->last_isoc_frame_num >= 0) {
454 if (((usbvision->last_isoc_frame_num + 1) % 32) != frame->isoc_header.frame_num) {
455 /* unexpected frame drop: need to request new intra frame */
456 PDEBUG(DBG_HEADER, "Lost frame before %d on USB", frame->isoc_header.frame_num);
457 usbvision_request_intra(usbvision);
458 return parse_state_next_frame;
459 }
460 }
461 usbvision->last_isoc_frame_num = frame->isoc_header.frame_num;
462 }
463 usbvision->header_count++;
464 frame->scanstate = scan_state_lines;
465 frame->curline = 0;
466
467 return parse_state_continue;
468 }
469
470 static enum parse_state usbvision_parse_lines_422(struct usb_usbvision *usbvision,
471 long *pcopylen)
472 {
473 volatile struct usbvision_frame *frame;
474 unsigned char *f;
475 int len;
476 int i;
477 unsigned char yuyv[4] = { 180, 128, 10, 128 }; /* YUV components */
478 unsigned char rv, gv, bv; /* RGB components */
479 int clipmask_index, bytes_per_pixel;
480 int stretch_bytes, clipmask_add;
481
482 frame = usbvision->cur_frame;
483 f = frame->data + (frame->v4l2_linesize * frame->curline);
484
485 /* Make sure there's enough data for the entire line */
486 len = (frame->isoc_header.frame_width * 2) + 5;
487 if (scratch_len(usbvision) < len) {
488 PDEBUG(DBG_PARSE, "out of data in line %d, need %u.\n", frame->curline, len);
489 return parse_state_out;
490 }
491
492 if ((frame->curline + 1) >= frame->frmheight)
493 return parse_state_next_frame;
494
495 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
496 stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
497 clipmask_index = frame->curline * MAX_FRAME_WIDTH;
498 clipmask_add = usbvision->stretch_width;
499
500 for (i = 0; i < frame->frmwidth; i += (2 * usbvision->stretch_width)) {
501 scratch_get(usbvision, &yuyv[0], 4);
502
503 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
504 *f++ = yuyv[0]; /* Y */
505 *f++ = yuyv[3]; /* U */
506 } else {
507 YUV_TO_RGB_BY_THE_BOOK(yuyv[0], yuyv[1], yuyv[3], rv, gv, bv);
508 switch (frame->v4l2_format.format) {
509 case V4L2_PIX_FMT_RGB565:
510 *f++ = (0x1F & rv) |
511 (0xE0 & (gv << 5));
512 *f++ = (0x07 & (gv >> 3)) |
513 (0xF8 & bv);
514 break;
515 case V4L2_PIX_FMT_RGB24:
516 *f++ = rv;
517 *f++ = gv;
518 *f++ = bv;
519 break;
520 case V4L2_PIX_FMT_RGB32:
521 *f++ = rv;
522 *f++ = gv;
523 *f++ = bv;
524 f++;
525 break;
526 case V4L2_PIX_FMT_RGB555:
527 *f++ = (0x1F & rv) |
528 (0xE0 & (gv << 5));
529 *f++ = (0x03 & (gv >> 3)) |
530 (0x7C & (bv << 2));
531 break;
532 }
533 }
534 clipmask_index += clipmask_add;
535 f += stretch_bytes;
536
537 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
538 *f++ = yuyv[2]; /* Y */
539 *f++ = yuyv[1]; /* V */
540 } else {
541 YUV_TO_RGB_BY_THE_BOOK(yuyv[2], yuyv[1], yuyv[3], rv, gv, bv);
542 switch (frame->v4l2_format.format) {
543 case V4L2_PIX_FMT_RGB565:
544 *f++ = (0x1F & rv) |
545 (0xE0 & (gv << 5));
546 *f++ = (0x07 & (gv >> 3)) |
547 (0xF8 & bv);
548 break;
549 case V4L2_PIX_FMT_RGB24:
550 *f++ = rv;
551 *f++ = gv;
552 *f++ = bv;
553 break;
554 case V4L2_PIX_FMT_RGB32:
555 *f++ = rv;
556 *f++ = gv;
557 *f++ = bv;
558 f++;
559 break;
560 case V4L2_PIX_FMT_RGB555:
561 *f++ = (0x1F & rv) |
562 (0xE0 & (gv << 5));
563 *f++ = (0x03 & (gv >> 3)) |
564 (0x7C & (bv << 2));
565 break;
566 }
567 }
568 clipmask_index += clipmask_add;
569 f += stretch_bytes;
570 }
571
572 frame->curline += usbvision->stretch_height;
573 *pcopylen += frame->v4l2_linesize * usbvision->stretch_height;
574
575 if (frame->curline >= frame->frmheight)
576 return parse_state_next_frame;
577 return parse_state_continue;
578 }
579
580 /* The decompression routine */
581 static int usbvision_decompress(struct usb_usbvision *usbvision, unsigned char *compressed,
582 unsigned char *decompressed, int *start_pos,
583 int *block_typestart_pos, int len)
584 {
585 int rest_pixel, idx, pos, extra_pos, block_len, block_type_pos, block_type_len;
586 unsigned char block_byte, block_code, block_type, block_type_byte, integrator;
587
588 integrator = 0;
589 pos = *start_pos;
590 block_type_pos = *block_typestart_pos;
591 extra_pos = pos;
592 block_len = 0;
593 block_byte = 0;
594 block_code = 0;
595 block_type = 0;
596 block_type_byte = 0;
597 block_type_len = 0;
598 rest_pixel = len;
599
600 for (idx = 0; idx < len; idx++) {
601 if (block_len == 0) {
602 if (block_type_len == 0) {
603 block_type_byte = compressed[block_type_pos];
604 block_type_pos++;
605 block_type_len = 4;
606 }
607 block_type = (block_type_byte & 0xC0) >> 6;
608
609 /* statistic: */
610 usbvision->compr_block_types[block_type]++;
611
612 pos = extra_pos;
613 if (block_type == 0) {
614 if (rest_pixel >= 24) {
615 idx += 23;
616 rest_pixel -= 24;
617 integrator = decompressed[idx];
618 } else {
619 idx += rest_pixel - 1;
620 rest_pixel = 0;
621 }
622 } else {
623 block_code = compressed[pos];
624 pos++;
625 if (rest_pixel >= 24)
626 block_len = 24;
627 else
628 block_len = rest_pixel;
629 rest_pixel -= block_len;
630 extra_pos = pos + (block_len / 4);
631 }
632 block_type_byte <<= 2;
633 block_type_len -= 1;
634 }
635 if (block_len > 0) {
636 if ((block_len % 4) == 0) {
637 block_byte = compressed[pos];
638 pos++;
639 }
640 if (block_type == 1) /* inter Block */
641 integrator = decompressed[idx];
642 switch (block_byte & 0xC0) {
643 case 0x03 << 6:
644 integrator += compressed[extra_pos];
645 extra_pos++;
646 break;
647 case 0x02 << 6:
648 integrator += block_code;
649 break;
650 case 0x00:
651 integrator -= block_code;
652 break;
653 }
654 decompressed[idx] = integrator;
655 block_byte <<= 2;
656 block_len -= 1;
657 }
658 }
659 *start_pos = extra_pos;
660 *block_typestart_pos = block_type_pos;
661 return idx;
662 }
663
664
665 /*
666 * usbvision_parse_compress()
667 *
668 * Parse compressed frame from the scratch buffer, put
669 * decoded RGB value into the current frame buffer and add the written
670 * number of bytes (RGB) to the *pcopylen.
671 *
672 */
673 static enum parse_state usbvision_parse_compress(struct usb_usbvision *usbvision,
674 long *pcopylen)
675 {
676 #define USBVISION_STRIP_MAGIC 0x5A
677 #define USBVISION_STRIP_LEN_MAX 400
678 #define USBVISION_STRIP_HEADER_LEN 3
679
680 struct usbvision_frame *frame;
681 unsigned char *f, *u = NULL, *v = NULL;
682 unsigned char strip_data[USBVISION_STRIP_LEN_MAX];
683 unsigned char strip_header[USBVISION_STRIP_HEADER_LEN];
684 int idx, idx_end, strip_len, strip_ptr, startblock_pos, block_pos, block_type_pos;
685 int clipmask_index;
686 int image_size;
687 unsigned char rv, gv, bv;
688 static unsigned char *Y, *U, *V;
689
690 frame = usbvision->cur_frame;
691 image_size = frame->frmwidth * frame->frmheight;
692 if ((frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) ||
693 (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420)) { /* this is a planar format */
694 /* ... v4l2_linesize not used here. */
695 f = frame->data + (frame->width * frame->curline);
696 } else
697 f = frame->data + (frame->v4l2_linesize * frame->curline);
698
699 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { /* initialise u and v pointers */
700 /* get base of u and b planes add halfoffset */
701 u = frame->data
702 + image_size
703 + (frame->frmwidth >> 1) * frame->curline;
704 v = u + (image_size >> 1);
705 } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) {
706 v = frame->data + image_size + ((frame->curline * (frame->width)) >> 2);
707 u = v + (image_size >> 2);
708 }
709
710 if (frame->curline == 0)
711 usbvision_adjust_compression(usbvision);
712
713 if (scratch_len(usbvision) < USBVISION_STRIP_HEADER_LEN)
714 return parse_state_out;
715
716 /* get strip header without changing the scratch_read_ptr */
717 scratch_set_extra_ptr(usbvision, &strip_ptr, 0);
718 scratch_get_extra(usbvision, &strip_header[0], &strip_ptr,
719 USBVISION_STRIP_HEADER_LEN);
720
721 if (strip_header[0] != USBVISION_STRIP_MAGIC) {
722 /* wrong strip magic */
723 usbvision->strip_magic_errors++;
724 return parse_state_next_frame;
725 }
726
727 if (frame->curline != (int)strip_header[2]) {
728 /* line number mismatch error */
729 usbvision->strip_line_number_errors++;
730 }
731
732 strip_len = 2 * (unsigned int)strip_header[1];
733 if (strip_len > USBVISION_STRIP_LEN_MAX) {
734 /* strip overrun */
735 /* I think this never happens */
736 usbvision_request_intra(usbvision);
737 }
738
739 if (scratch_len(usbvision) < strip_len) {
740 /* there is not enough data for the strip */
741 return parse_state_out;
742 }
743
744 if (usbvision->intra_frame_buffer) {
745 Y = usbvision->intra_frame_buffer + frame->frmwidth * frame->curline;
746 U = usbvision->intra_frame_buffer + image_size + (frame->frmwidth / 2) * (frame->curline / 2);
747 V = usbvision->intra_frame_buffer + image_size / 4 * 5 + (frame->frmwidth / 2) * (frame->curline / 2);
748 } else {
749 return parse_state_next_frame;
750 }
751
752 clipmask_index = frame->curline * MAX_FRAME_WIDTH;
753
754 scratch_get(usbvision, strip_data, strip_len);
755
756 idx_end = frame->frmwidth;
757 block_type_pos = USBVISION_STRIP_HEADER_LEN;
758 startblock_pos = block_type_pos + (idx_end - 1) / 96 + (idx_end / 2 - 1) / 96 + 2;
759 block_pos = startblock_pos;
760
761 usbvision->block_pos = block_pos;
762
763 usbvision_decompress(usbvision, strip_data, Y, &block_pos, &block_type_pos, idx_end);
764 if (strip_len > usbvision->max_strip_len)
765 usbvision->max_strip_len = strip_len;
766
767 if (frame->curline % 2)
768 usbvision_decompress(usbvision, strip_data, V, &block_pos, &block_type_pos, idx_end / 2);
769 else
770 usbvision_decompress(usbvision, strip_data, U, &block_pos, &block_type_pos, idx_end / 2);
771
772 if (block_pos > usbvision->comprblock_pos)
773 usbvision->comprblock_pos = block_pos;
774 if (block_pos > strip_len)
775 usbvision->strip_len_errors++;
776
777 for (idx = 0; idx < idx_end; idx++) {
778 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
779 *f++ = Y[idx];
780 *f++ = idx & 0x01 ? U[idx / 2] : V[idx / 2];
781 } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) {
782 *f++ = Y[idx];
783 if (idx & 0x01)
784 *u++ = U[idx >> 1];
785 else
786 *v++ = V[idx >> 1];
787 } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) {
788 *f++ = Y[idx];
789 if (!((idx & 0x01) | (frame->curline & 0x01))) {
790 /* only need do this for 1 in 4 pixels */
791 /* intraframe buffer is YUV420 format */
792 *u++ = U[idx >> 1];
793 *v++ = V[idx >> 1];
794 }
795 } else {
796 YUV_TO_RGB_BY_THE_BOOK(Y[idx], U[idx / 2], V[idx / 2], rv, gv, bv);
797 switch (frame->v4l2_format.format) {
798 case V4L2_PIX_FMT_GREY:
799 *f++ = Y[idx];
800 break;
801 case V4L2_PIX_FMT_RGB555:
802 *f++ = (0x1F & rv) |
803 (0xE0 & (gv << 5));
804 *f++ = (0x03 & (gv >> 3)) |
805 (0x7C & (bv << 2));
806 break;
807 case V4L2_PIX_FMT_RGB565:
808 *f++ = (0x1F & rv) |
809 (0xE0 & (gv << 5));
810 *f++ = (0x07 & (gv >> 3)) |
811 (0xF8 & bv);
812 break;
813 case V4L2_PIX_FMT_RGB24:
814 *f++ = rv;
815 *f++ = gv;
816 *f++ = bv;
817 break;
818 case V4L2_PIX_FMT_RGB32:
819 *f++ = rv;
820 *f++ = gv;
821 *f++ = bv;
822 f++;
823 break;
824 }
825 }
826 clipmask_index++;
827 }
828 /* Deal with non-integer no. of bytes for YUV420P */
829 if (frame->v4l2_format.format != V4L2_PIX_FMT_YVU420)
830 *pcopylen += frame->v4l2_linesize;
831 else
832 *pcopylen += frame->curline & 0x01 ? frame->v4l2_linesize : frame->v4l2_linesize << 1;
833
834 frame->curline += 1;
835
836 if (frame->curline >= frame->frmheight)
837 return parse_state_next_frame;
838 return parse_state_continue;
839
840 }
841
842
843 /*
844 * usbvision_parse_lines_420()
845 *
846 * Parse two lines from the scratch buffer, put
847 * decoded RGB value into the current frame buffer and add the written
848 * number of bytes (RGB) to the *pcopylen.
849 *
850 */
851 static enum parse_state usbvision_parse_lines_420(struct usb_usbvision *usbvision,
852 long *pcopylen)
853 {
854 struct usbvision_frame *frame;
855 unsigned char *f_even = NULL, *f_odd = NULL;
856 unsigned int pixel_per_line, block;
857 int pixel, block_split;
858 int y_ptr, u_ptr, v_ptr, y_odd_offset;
859 const int y_block_size = 128;
860 const int uv_block_size = 64;
861 const int sub_block_size = 32;
862 const int y_step[] = { 0, 0, 0, 2 }, y_step_size = 4;
863 const int uv_step[] = { 0, 0, 0, 4 }, uv_step_size = 4;
864 unsigned char y[2], u, v; /* YUV components */
865 int y_, u_, v_, vb, uvg, ur;
866 int r_, g_, b_; /* RGB components */
867 unsigned char g;
868 int clipmask_even_index, clipmask_odd_index, bytes_per_pixel;
869 int clipmask_add, stretch_bytes;
870
871 frame = usbvision->cur_frame;
872 f_even = frame->data + (frame->v4l2_linesize * frame->curline);
873 f_odd = f_even + frame->v4l2_linesize * usbvision->stretch_height;
874
875 /* Make sure there's enough data for the entire line */
876 /* In this mode usbvision transfer 3 bytes for every 2 pixels */
877 /* I need two lines to decode the color */
878 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
879 stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
880 clipmask_even_index = frame->curline * MAX_FRAME_WIDTH;
881 clipmask_odd_index = clipmask_even_index + MAX_FRAME_WIDTH;
882 clipmask_add = usbvision->stretch_width;
883 pixel_per_line = frame->isoc_header.frame_width;
884
885 if (scratch_len(usbvision) < (int)pixel_per_line * 3) {
886 /* printk(KERN_DEBUG "out of data, need %d\n", len); */
887 return parse_state_out;
888 }
889
890 if ((frame->curline + 1) >= frame->frmheight)
891 return parse_state_next_frame;
892
893 block_split = (pixel_per_line%y_block_size) ? 1 : 0; /* are some blocks split into different lines? */
894
895 y_odd_offset = (pixel_per_line / y_block_size) * (y_block_size + uv_block_size)
896 + block_split * uv_block_size;
897
898 scratch_set_extra_ptr(usbvision, &y_ptr, y_odd_offset);
899 scratch_set_extra_ptr(usbvision, &u_ptr, y_block_size);
900 scratch_set_extra_ptr(usbvision, &v_ptr, y_odd_offset
901 + (4 - block_split) * sub_block_size);
902
903 for (block = 0; block < (pixel_per_line / sub_block_size); block++) {
904 for (pixel = 0; pixel < sub_block_size; pixel += 2) {
905 scratch_get(usbvision, &y[0], 2);
906 scratch_get_extra(usbvision, &u, &u_ptr, 1);
907 scratch_get_extra(usbvision, &v, &v_ptr, 1);
908
909 /* I don't use the YUV_TO_RGB macro for better performance */
910 v_ = v - 128;
911 u_ = u - 128;
912 vb = 132252 * v_;
913 uvg = -53281 * u_ - 25625 * v_;
914 ur = 104595 * u_;
915
916 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
917 *f_even++ = y[0];
918 *f_even++ = v;
919 } else {
920 y_ = 76284 * (y[0] - 16);
921
922 b_ = (y_ + vb) >> 16;
923 g_ = (y_ + uvg) >> 16;
924 r_ = (y_ + ur) >> 16;
925
926 switch (frame->v4l2_format.format) {
927 case V4L2_PIX_FMT_RGB565:
928 g = LIMIT_RGB(g_);
929 *f_even++ =
930 (0x1F & LIMIT_RGB(r_)) |
931 (0xE0 & (g << 5));
932 *f_even++ =
933 (0x07 & (g >> 3)) |
934 (0xF8 & LIMIT_RGB(b_));
935 break;
936 case V4L2_PIX_FMT_RGB24:
937 *f_even++ = LIMIT_RGB(r_);
938 *f_even++ = LIMIT_RGB(g_);
939 *f_even++ = LIMIT_RGB(b_);
940 break;
941 case V4L2_PIX_FMT_RGB32:
942 *f_even++ = LIMIT_RGB(r_);
943 *f_even++ = LIMIT_RGB(g_);
944 *f_even++ = LIMIT_RGB(b_);
945 f_even++;
946 break;
947 case V4L2_PIX_FMT_RGB555:
948 g = LIMIT_RGB(g_);
949 *f_even++ = (0x1F & LIMIT_RGB(r_)) |
950 (0xE0 & (g << 5));
951 *f_even++ = (0x03 & (g >> 3)) |
952 (0x7C & (LIMIT_RGB(b_) << 2));
953 break;
954 }
955 }
956 clipmask_even_index += clipmask_add;
957 f_even += stretch_bytes;
958
959 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
960 *f_even++ = y[1];
961 *f_even++ = u;
962 } else {
963 y_ = 76284 * (y[1] - 16);
964
965 b_ = (y_ + vb) >> 16;
966 g_ = (y_ + uvg) >> 16;
967 r_ = (y_ + ur) >> 16;
968
969 switch (frame->v4l2_format.format) {
970 case V4L2_PIX_FMT_RGB565:
971 g = LIMIT_RGB(g_);
972 *f_even++ =
973 (0x1F & LIMIT_RGB(r_)) |
974 (0xE0 & (g << 5));
975 *f_even++ =
976 (0x07 & (g >> 3)) |
977 (0xF8 & LIMIT_RGB(b_));
978 break;
979 case V4L2_PIX_FMT_RGB24:
980 *f_even++ = LIMIT_RGB(r_);
981 *f_even++ = LIMIT_RGB(g_);
982 *f_even++ = LIMIT_RGB(b_);
983 break;
984 case V4L2_PIX_FMT_RGB32:
985 *f_even++ = LIMIT_RGB(r_);
986 *f_even++ = LIMIT_RGB(g_);
987 *f_even++ = LIMIT_RGB(b_);
988 f_even++;
989 break;
990 case V4L2_PIX_FMT_RGB555:
991 g = LIMIT_RGB(g_);
992 *f_even++ = (0x1F & LIMIT_RGB(r_)) |
993 (0xE0 & (g << 5));
994 *f_even++ = (0x03 & (g >> 3)) |
995 (0x7C & (LIMIT_RGB(b_) << 2));
996 break;
997 }
998 }
999 clipmask_even_index += clipmask_add;
1000 f_even += stretch_bytes;
1001
1002 scratch_get_extra(usbvision, &y[0], &y_ptr, 2);
1003
1004 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1005 *f_odd++ = y[0];
1006 *f_odd++ = v;
1007 } else {
1008 y_ = 76284 * (y[0] - 16);
1009
1010 b_ = (y_ + vb) >> 16;
1011 g_ = (y_ + uvg) >> 16;
1012 r_ = (y_ + ur) >> 16;
1013
1014 switch (frame->v4l2_format.format) {
1015 case V4L2_PIX_FMT_RGB565:
1016 g = LIMIT_RGB(g_);
1017 *f_odd++ =
1018 (0x1F & LIMIT_RGB(r_)) |
1019 (0xE0 & (g << 5));
1020 *f_odd++ =
1021 (0x07 & (g >> 3)) |
1022 (0xF8 & LIMIT_RGB(b_));
1023 break;
1024 case V4L2_PIX_FMT_RGB24:
1025 *f_odd++ = LIMIT_RGB(r_);
1026 *f_odd++ = LIMIT_RGB(g_);
1027 *f_odd++ = LIMIT_RGB(b_);
1028 break;
1029 case V4L2_PIX_FMT_RGB32:
1030 *f_odd++ = LIMIT_RGB(r_);
1031 *f_odd++ = LIMIT_RGB(g_);
1032 *f_odd++ = LIMIT_RGB(b_);
1033 f_odd++;
1034 break;
1035 case V4L2_PIX_FMT_RGB555:
1036 g = LIMIT_RGB(g_);
1037 *f_odd++ = (0x1F & LIMIT_RGB(r_)) |
1038 (0xE0 & (g << 5));
1039 *f_odd++ = (0x03 & (g >> 3)) |
1040 (0x7C & (LIMIT_RGB(b_) << 2));
1041 break;
1042 }
1043 }
1044 clipmask_odd_index += clipmask_add;
1045 f_odd += stretch_bytes;
1046
1047 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1048 *f_odd++ = y[1];
1049 *f_odd++ = u;
1050 } else {
1051 y_ = 76284 * (y[1] - 16);
1052
1053 b_ = (y_ + vb) >> 16;
1054 g_ = (y_ + uvg) >> 16;
1055 r_ = (y_ + ur) >> 16;
1056
1057 switch (frame->v4l2_format.format) {
1058 case V4L2_PIX_FMT_RGB565:
1059 g = LIMIT_RGB(g_);
1060 *f_odd++ =
1061 (0x1F & LIMIT_RGB(r_)) |
1062 (0xE0 & (g << 5));
1063 *f_odd++ =
1064 (0x07 & (g >> 3)) |
1065 (0xF8 & LIMIT_RGB(b_));
1066 break;
1067 case V4L2_PIX_FMT_RGB24:
1068 *f_odd++ = LIMIT_RGB(r_);
1069 *f_odd++ = LIMIT_RGB(g_);
1070 *f_odd++ = LIMIT_RGB(b_);
1071 break;
1072 case V4L2_PIX_FMT_RGB32:
1073 *f_odd++ = LIMIT_RGB(r_);
1074 *f_odd++ = LIMIT_RGB(g_);
1075 *f_odd++ = LIMIT_RGB(b_);
1076 f_odd++;
1077 break;
1078 case V4L2_PIX_FMT_RGB555:
1079 g = LIMIT_RGB(g_);
1080 *f_odd++ = (0x1F & LIMIT_RGB(r_)) |
1081 (0xE0 & (g << 5));
1082 *f_odd++ = (0x03 & (g >> 3)) |
1083 (0x7C & (LIMIT_RGB(b_) << 2));
1084 break;
1085 }
1086 }
1087 clipmask_odd_index += clipmask_add;
1088 f_odd += stretch_bytes;
1089 }
1090
1091 scratch_rm_old(usbvision, y_step[block % y_step_size] * sub_block_size);
1092 scratch_inc_extra_ptr(&y_ptr, y_step[(block + 2 * block_split) % y_step_size]
1093 * sub_block_size);
1094 scratch_inc_extra_ptr(&u_ptr, uv_step[block % uv_step_size]
1095 * sub_block_size);
1096 scratch_inc_extra_ptr(&v_ptr, uv_step[(block + 2 * block_split) % uv_step_size]
1097 * sub_block_size);
1098 }
1099
1100 scratch_rm_old(usbvision, pixel_per_line * 3 / 2
1101 + block_split * sub_block_size);
1102
1103 frame->curline += 2 * usbvision->stretch_height;
1104 *pcopylen += frame->v4l2_linesize * 2 * usbvision->stretch_height;
1105
1106 if (frame->curline >= frame->frmheight)
1107 return parse_state_next_frame;
1108 return parse_state_continue;
1109 }
1110
1111 /*
1112 * usbvision_parse_data()
1113 *
1114 * Generic routine to parse the scratch buffer. It employs either
1115 * usbvision_find_header() or usbvision_parse_lines() to do most
1116 * of work.
1117 *
1118 */
1119 static void usbvision_parse_data(struct usb_usbvision *usbvision)
1120 {
1121 struct usbvision_frame *frame;
1122 enum parse_state newstate;
1123 long copylen = 0;
1124 unsigned long lock_flags;
1125
1126 frame = usbvision->cur_frame;
1127
1128 PDEBUG(DBG_PARSE, "parsing len=%d\n", scratch_len(usbvision));
1129
1130 while (1) {
1131 newstate = parse_state_out;
1132 if (scratch_len(usbvision)) {
1133 if (frame->scanstate == scan_state_scanning) {
1134 newstate = usbvision_find_header(usbvision);
1135 } else if (frame->scanstate == scan_state_lines) {
1136 if (usbvision->isoc_mode == ISOC_MODE_YUV420)
1137 newstate = usbvision_parse_lines_420(usbvision, &copylen);
1138 else if (usbvision->isoc_mode == ISOC_MODE_YUV422)
1139 newstate = usbvision_parse_lines_422(usbvision, &copylen);
1140 else if (usbvision->isoc_mode == ISOC_MODE_COMPRESS)
1141 newstate = usbvision_parse_compress(usbvision, &copylen);
1142 }
1143 }
1144 if (newstate == parse_state_continue)
1145 continue;
1146 if ((newstate == parse_state_next_frame) || (newstate == parse_state_out))
1147 break;
1148 return; /* parse_state_end_parse */
1149 }
1150
1151 if (newstate == parse_state_next_frame) {
1152 frame->grabstate = frame_state_done;
1153 frame->ts = ktime_get_ns();
1154 frame->sequence = usbvision->frame_num;
1155
1156 spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
1157 list_move_tail(&(frame->frame), &usbvision->outqueue);
1158 usbvision->cur_frame = NULL;
1159 spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
1160
1161 usbvision->frame_num++;
1162
1163 /* This will cause the process to request another frame. */
1164 if (waitqueue_active(&usbvision->wait_frame)) {
1165 PDEBUG(DBG_PARSE, "Wake up !");
1166 wake_up_interruptible(&usbvision->wait_frame);
1167 }
1168 } else {
1169 frame->grabstate = frame_state_grabbing;
1170 }
1171
1172 /* Update the frame's uncompressed length. */
1173 frame->scanlength += copylen;
1174 }
1175
1176
1177 /*
1178 * Make all of the blocks of data contiguous
1179 */
1180 static int usbvision_compress_isochronous(struct usb_usbvision *usbvision,
1181 struct urb *urb)
1182 {
1183 unsigned char *packet_data;
1184 int i, totlen = 0;
1185
1186 for (i = 0; i < urb->number_of_packets; i++) {
1187 int packet_len = urb->iso_frame_desc[i].actual_length;
1188 int packet_stat = urb->iso_frame_desc[i].status;
1189
1190 packet_data = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
1191
1192 /* Detect and ignore errored packets */
1193 if (packet_stat) { /* packet_stat != 0 ????????????? */
1194 PDEBUG(DBG_ISOC, "data error: [%d] len=%d, status=%X", i, packet_len, packet_stat);
1195 usbvision->isoc_err_count++;
1196 continue;
1197 }
1198
1199 /* Detect and ignore empty packets */
1200 if (packet_len < 0) {
1201 PDEBUG(DBG_ISOC, "error packet [%d]", i);
1202 usbvision->isoc_skip_count++;
1203 continue;
1204 } else if (packet_len == 0) { /* Frame end ????? */
1205 PDEBUG(DBG_ISOC, "null packet [%d]", i);
1206 usbvision->isocstate = isoc_state_no_frame;
1207 usbvision->isoc_skip_count++;
1208 continue;
1209 } else if (packet_len > usbvision->isoc_packet_size) {
1210 PDEBUG(DBG_ISOC, "packet[%d] > isoc_packet_size", i);
1211 usbvision->isoc_skip_count++;
1212 continue;
1213 }
1214
1215 PDEBUG(DBG_ISOC, "packet ok [%d] len=%d", i, packet_len);
1216
1217 if (usbvision->isocstate == isoc_state_no_frame) { /* new frame begins */
1218 usbvision->isocstate = isoc_state_in_frame;
1219 scratch_mark_header(usbvision);
1220 usbvision_measure_bandwidth(usbvision);
1221 PDEBUG(DBG_ISOC, "packet with header");
1222 }
1223
1224 /*
1225 * If usbvision continues to feed us with data but there is no
1226 * consumption (if, for example, V4L client fell asleep) we
1227 * may overflow the buffer. We have to move old data over to
1228 * free room for new data. This is bad for old data. If we
1229 * just drop new data then it's bad for new data... choose
1230 * your favorite evil here.
1231 */
1232 if (scratch_free(usbvision) < packet_len) {
1233 usbvision->scratch_ovf_count++;
1234 PDEBUG(DBG_ISOC, "scratch buf overflow! scr_len: %d, n: %d",
1235 scratch_len(usbvision), packet_len);
1236 scratch_rm_old(usbvision, packet_len - scratch_free(usbvision));
1237 }
1238
1239 /* Now we know that there is enough room in scratch buffer */
1240 scratch_put(usbvision, packet_data, packet_len);
1241 totlen += packet_len;
1242 usbvision->isoc_data_count += packet_len;
1243 usbvision->isoc_packet_count++;
1244 }
1245 #if ENABLE_HEXDUMP
1246 if (totlen > 0) {
1247 static int foo;
1248
1249 if (foo < 1) {
1250 printk(KERN_DEBUG "+%d.\n", usbvision->scratchlen);
1251 usbvision_hexdump(data0, (totlen > 64) ? 64 : totlen);
1252 ++foo;
1253 }
1254 }
1255 #endif
1256 return totlen;
1257 }
1258
1259 static void usbvision_isoc_irq(struct urb *urb)
1260 {
1261 int err_code = 0;
1262 int len;
1263 struct usb_usbvision *usbvision = urb->context;
1264 int i;
1265 struct usbvision_frame **f;
1266
1267 /* We don't want to do anything if we are about to be removed! */
1268 if (!USBVISION_IS_OPERATIONAL(usbvision))
1269 return;
1270
1271 /* any urb with wrong status is ignored without acknowledgement */
1272 if (urb->status == -ENOENT)
1273 return;
1274
1275 f = &usbvision->cur_frame;
1276
1277 /* Manage streaming interruption */
1278 if (usbvision->streaming == stream_interrupt) {
1279 usbvision->streaming = stream_idle;
1280 if ((*f)) {
1281 (*f)->grabstate = frame_state_ready;
1282 (*f)->scanstate = scan_state_scanning;
1283 }
1284 PDEBUG(DBG_IRQ, "stream interrupted");
1285 wake_up_interruptible(&usbvision->wait_stream);
1286 }
1287
1288 /* Copy the data received into our scratch buffer */
1289 len = usbvision_compress_isochronous(usbvision, urb);
1290
1291 usbvision->isoc_urb_count++;
1292 usbvision->urb_length = len;
1293
1294 if (usbvision->streaming == stream_on) {
1295 /* If we collected enough data let's parse! */
1296 if (scratch_len(usbvision) > USBVISION_HEADER_LENGTH &&
1297 !list_empty(&(usbvision->inqueue))) {
1298 if (!(*f)) {
1299 (*f) = list_entry(usbvision->inqueue.next,
1300 struct usbvision_frame,
1301 frame);
1302 }
1303 usbvision_parse_data(usbvision);
1304 } else {
1305 /* If we don't have a frame
1306 we're current working on, complain */
1307 PDEBUG(DBG_IRQ,
1308 "received data, but no one needs it");
1309 scratch_reset(usbvision);
1310 }
1311 } else {
1312 PDEBUG(DBG_IRQ, "received data, but no one needs it");
1313 scratch_reset(usbvision);
1314 }
1315
1316 for (i = 0; i < USBVISION_URB_FRAMES; i++) {
1317 urb->iso_frame_desc[i].status = 0;
1318 urb->iso_frame_desc[i].actual_length = 0;
1319 }
1320
1321 urb->status = 0;
1322 urb->dev = usbvision->dev;
1323 err_code = usb_submit_urb(urb, GFP_ATOMIC);
1324
1325 if (err_code) {
1326 dev_err(&usbvision->dev->dev,
1327 "%s: usb_submit_urb failed: error %d\n",
1328 __func__, err_code);
1329 }
1330
1331 return;
1332 }
1333
1334 /*************************************/
1335 /* Low level usbvision access functions */
1336 /*************************************/
1337
1338 /*
1339 * usbvision_read_reg()
1340 *
1341 * return < 0 -> Error
1342 * >= 0 -> Data
1343 */
1344
1345 int usbvision_read_reg(struct usb_usbvision *usbvision, unsigned char reg)
1346 {
1347 int err_code = 0;
1348 unsigned char *buffer = usbvision->ctrl_urb_buffer;
1349
1350 if (!USBVISION_IS_OPERATIONAL(usbvision))
1351 return -1;
1352
1353 err_code = usb_control_msg(usbvision->dev, usb_rcvctrlpipe(usbvision->dev, 1),
1354 USBVISION_OP_CODE,
1355 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1356 0, (__u16) reg, buffer, 1, HZ);
1357
1358 if (err_code < 0) {
1359 dev_err(&usbvision->dev->dev,
1360 "%s: failed: error %d\n", __func__, err_code);
1361 return err_code;
1362 }
1363 return buffer[0];
1364 }
1365
1366 /*
1367 * usbvision_write_reg()
1368 *
1369 * return 1 -> Reg written
1370 * 0 -> usbvision is not yet ready
1371 * -1 -> Something went wrong
1372 */
1373
1374 int usbvision_write_reg(struct usb_usbvision *usbvision, unsigned char reg,
1375 unsigned char value)
1376 {
1377 int err_code = 0;
1378
1379 if (!USBVISION_IS_OPERATIONAL(usbvision))
1380 return 0;
1381
1382 usbvision->ctrl_urb_buffer[0] = value;
1383 err_code = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1384 USBVISION_OP_CODE,
1385 USB_DIR_OUT | USB_TYPE_VENDOR |
1386 USB_RECIP_ENDPOINT, 0, (__u16) reg,
1387 usbvision->ctrl_urb_buffer, 1, HZ);
1388
1389 if (err_code < 0) {
1390 dev_err(&usbvision->dev->dev,
1391 "%s: failed: error %d\n", __func__, err_code);
1392 }
1393 return err_code;
1394 }
1395
1396
1397 static void usbvision_ctrl_urb_complete(struct urb *urb)
1398 {
1399 struct usb_usbvision *usbvision = (struct usb_usbvision *)urb->context;
1400
1401 PDEBUG(DBG_IRQ, "");
1402 usbvision->ctrl_urb_busy = 0;
1403 }
1404
1405
1406 static int usbvision_write_reg_irq(struct usb_usbvision *usbvision, int address,
1407 unsigned char *data, int len)
1408 {
1409 int err_code = 0;
1410
1411 PDEBUG(DBG_IRQ, "");
1412 if (len > 8)
1413 return -EFAULT;
1414 if (usbvision->ctrl_urb_busy)
1415 return -EBUSY;
1416 usbvision->ctrl_urb_busy = 1;
1417
1418 usbvision->ctrl_urb_setup.bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT;
1419 usbvision->ctrl_urb_setup.bRequest = USBVISION_OP_CODE;
1420 usbvision->ctrl_urb_setup.wValue = 0;
1421 usbvision->ctrl_urb_setup.wIndex = cpu_to_le16(address);
1422 usbvision->ctrl_urb_setup.wLength = cpu_to_le16(len);
1423 usb_fill_control_urb(usbvision->ctrl_urb, usbvision->dev,
1424 usb_sndctrlpipe(usbvision->dev, 1),
1425 (unsigned char *)&usbvision->ctrl_urb_setup,
1426 (void *)usbvision->ctrl_urb_buffer, len,
1427 usbvision_ctrl_urb_complete,
1428 (void *)usbvision);
1429
1430 memcpy(usbvision->ctrl_urb_buffer, data, len);
1431
1432 err_code = usb_submit_urb(usbvision->ctrl_urb, GFP_ATOMIC);
1433 if (err_code < 0) {
1434 /* error in usb_submit_urb() */
1435 usbvision->ctrl_urb_busy = 0;
1436 }
1437 PDEBUG(DBG_IRQ, "submit %d byte: error %d", len, err_code);
1438 return err_code;
1439 }
1440
1441
1442 static int usbvision_init_compression(struct usb_usbvision *usbvision)
1443 {
1444 usbvision->last_isoc_frame_num = -1;
1445 usbvision->isoc_data_count = 0;
1446 usbvision->isoc_packet_count = 0;
1447 usbvision->isoc_skip_count = 0;
1448 usbvision->compr_level = 50;
1449 usbvision->last_compr_level = -1;
1450 usbvision->isoc_urb_count = 0;
1451 usbvision->request_intra = 1;
1452 usbvision->isoc_measure_bandwidth_count = 0;
1453
1454 return 0;
1455 }
1456
1457 /* this function measures the used bandwidth since last call
1458 * return: 0 : no error
1459 * sets used_bandwidth to 1-100 : 1-100% of full bandwidth resp. to isoc_packet_size
1460 */
1461 static int usbvision_measure_bandwidth(struct usb_usbvision *usbvision)
1462 {
1463 if (usbvision->isoc_measure_bandwidth_count < 2) { /* this gives an average bandwidth of 3 frames */
1464 usbvision->isoc_measure_bandwidth_count++;
1465 return 0;
1466 }
1467 if ((usbvision->isoc_packet_size > 0) && (usbvision->isoc_packet_count > 0)) {
1468 usbvision->used_bandwidth = usbvision->isoc_data_count /
1469 (usbvision->isoc_packet_count + usbvision->isoc_skip_count) *
1470 100 / usbvision->isoc_packet_size;
1471 }
1472 usbvision->isoc_measure_bandwidth_count = 0;
1473 usbvision->isoc_data_count = 0;
1474 usbvision->isoc_packet_count = 0;
1475 usbvision->isoc_skip_count = 0;
1476 return 0;
1477 }
1478
1479 static int usbvision_adjust_compression(struct usb_usbvision *usbvision)
1480 {
1481 int err_code = 0;
1482 unsigned char buffer[6];
1483
1484 PDEBUG(DBG_IRQ, "");
1485 if ((adjust_compression) && (usbvision->used_bandwidth > 0)) {
1486 usbvision->compr_level += (usbvision->used_bandwidth - 90) / 2;
1487 RESTRICT_TO_RANGE(usbvision->compr_level, 0, 100);
1488 if (usbvision->compr_level != usbvision->last_compr_level) {
1489 int distortion;
1490
1491 if (usbvision->bridge_type == BRIDGE_NT1004 || usbvision->bridge_type == BRIDGE_NT1005) {
1492 buffer[0] = (unsigned char)(4 + 16 * usbvision->compr_level / 100); /* PCM Threshold 1 */
1493 buffer[1] = (unsigned char)(4 + 8 * usbvision->compr_level / 100); /* PCM Threshold 2 */
1494 distortion = 7 + 248 * usbvision->compr_level / 100;
1495 buffer[2] = (unsigned char)(distortion & 0xFF); /* Average distortion Threshold (inter) */
1496 buffer[3] = (unsigned char)(distortion & 0xFF); /* Average distortion Threshold (intra) */
1497 distortion = 1 + 42 * usbvision->compr_level / 100;
1498 buffer[4] = (unsigned char)(distortion & 0xFF); /* Maximum distortion Threshold (inter) */
1499 buffer[5] = (unsigned char)(distortion & 0xFF); /* Maximum distortion Threshold (intra) */
1500 } else { /* BRIDGE_NT1003 */
1501 buffer[0] = (unsigned char)(4 + 16 * usbvision->compr_level / 100); /* PCM threshold 1 */
1502 buffer[1] = (unsigned char)(4 + 8 * usbvision->compr_level / 100); /* PCM threshold 2 */
1503 distortion = 2 + 253 * usbvision->compr_level / 100;
1504 buffer[2] = (unsigned char)(distortion & 0xFF); /* distortion threshold bit0-7 */
1505 buffer[3] = 0; /* (unsigned char)((distortion >> 8) & 0x0F); distortion threshold bit 8-11 */
1506 distortion = 0 + 43 * usbvision->compr_level / 100;
1507 buffer[4] = (unsigned char)(distortion & 0xFF); /* maximum distortion bit0-7 */
1508 buffer[5] = 0; /* (unsigned char)((distortion >> 8) & 0x01); maximum distortion bit 8 */
1509 }
1510 err_code = usbvision_write_reg_irq(usbvision, USBVISION_PCM_THR1, buffer, 6);
1511 if (err_code == 0) {
1512 PDEBUG(DBG_IRQ, "new compr params %#02x %#02x %#02x %#02x %#02x %#02x", buffer[0],
1513 buffer[1], buffer[2], buffer[3], buffer[4], buffer[5]);
1514 usbvision->last_compr_level = usbvision->compr_level;
1515 }
1516 }
1517 }
1518 return err_code;
1519 }
1520
1521 static int usbvision_request_intra(struct usb_usbvision *usbvision)
1522 {
1523 unsigned char buffer[1];
1524
1525 PDEBUG(DBG_IRQ, "");
1526 usbvision->request_intra = 1;
1527 buffer[0] = 1;
1528 usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1529 return 0;
1530 }
1531
1532 static int usbvision_unrequest_intra(struct usb_usbvision *usbvision)
1533 {
1534 unsigned char buffer[1];
1535
1536 PDEBUG(DBG_IRQ, "");
1537 usbvision->request_intra = 0;
1538 buffer[0] = 0;
1539 usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1540 return 0;
1541 }
1542
1543 /*******************************
1544 * usbvision utility functions
1545 *******************************/
1546
1547 int usbvision_power_off(struct usb_usbvision *usbvision)
1548 {
1549 int err_code = 0;
1550
1551 PDEBUG(DBG_FUNC, "");
1552
1553 err_code = usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
1554 if (err_code == 1)
1555 usbvision->power = 0;
1556 PDEBUG(DBG_FUNC, "%s: err_code %d", (err_code != 1) ? "ERROR" : "power is off", err_code);
1557 return err_code;
1558 }
1559
1560 /* configure webcam image sensor using the serial port */
1561 static int usbvision_init_webcam(struct usb_usbvision *usbvision)
1562 {
1563 int rc;
1564 int i;
1565 static char init_values[38][3] = {
1566 { 0x04, 0x12, 0x08 }, { 0x05, 0xff, 0xc8 }, { 0x06, 0x18, 0x07 }, { 0x07, 0x90, 0x00 },
1567 { 0x09, 0x00, 0x00 }, { 0x0a, 0x00, 0x00 }, { 0x0b, 0x08, 0x00 }, { 0x0d, 0xcc, 0xcc },
1568 { 0x0e, 0x13, 0x14 }, { 0x10, 0x9b, 0x83 }, { 0x11, 0x5a, 0x3f }, { 0x12, 0xe4, 0x73 },
1569 { 0x13, 0x88, 0x84 }, { 0x14, 0x89, 0x80 }, { 0x15, 0x00, 0x20 }, { 0x16, 0x00, 0x00 },
1570 { 0x17, 0xff, 0xa0 }, { 0x18, 0x6b, 0x20 }, { 0x19, 0x22, 0x40 }, { 0x1a, 0x10, 0x07 },
1571 { 0x1b, 0x00, 0x47 }, { 0x1c, 0x03, 0xe0 }, { 0x1d, 0x00, 0x00 }, { 0x1e, 0x00, 0x00 },
1572 { 0x1f, 0x00, 0x00 }, { 0x20, 0x00, 0x00 }, { 0x21, 0x00, 0x00 }, { 0x22, 0x00, 0x00 },
1573 { 0x23, 0x00, 0x00 }, { 0x24, 0x00, 0x00 }, { 0x25, 0x00, 0x00 }, { 0x26, 0x00, 0x00 },
1574 { 0x27, 0x00, 0x00 }, { 0x28, 0x00, 0x00 }, { 0x29, 0x00, 0x00 }, { 0x08, 0x80, 0x60 },
1575 { 0x0f, 0x2d, 0x24 }, { 0x0c, 0x80, 0x80 }
1576 };
1577 unsigned char *value = usbvision->ctrl_urb_buffer;
1578
1579 /* the only difference between PAL and NTSC init_values */
1580 if (usbvision_device_data[usbvision->dev_model].video_norm == V4L2_STD_NTSC)
1581 init_values[4][1] = 0x34;
1582
1583 for (i = 0; i < sizeof(init_values) / 3; i++) {
1584 usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT);
1585 memcpy(value, init_values[i], 3);
1586 rc = usb_control_msg(usbvision->dev,
1587 usb_sndctrlpipe(usbvision->dev, 1),
1588 USBVISION_OP_CODE,
1589 USB_DIR_OUT | USB_TYPE_VENDOR |
1590 USB_RECIP_ENDPOINT, 0,
1591 (__u16) USBVISION_SER_DAT1, value,
1592 3, HZ);
1593 if (rc < 0)
1594 return rc;
1595 usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SIO);
1596 /* write 3 bytes to the serial port using SIO mode */
1597 usbvision_write_reg(usbvision, USBVISION_SER_CONT, 3 | 0x10);
1598 usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, 0);
1599 usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT);
1600 usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, USBVISION_IO_2);
1601 usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT | USBVISION_CLK_OUT);
1602 usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT | USBVISION_DAT_IO);
1603 usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT | USBVISION_CLK_OUT | USBVISION_DAT_IO);
1604 }
1605
1606 return 0;
1607 }
1608
1609 /*
1610 * usbvision_set_video_format()
1611 *
1612 */
1613 static int usbvision_set_video_format(struct usb_usbvision *usbvision, int format)
1614 {
1615 static const char proc[] = "usbvision_set_video_format";
1616 unsigned char *value = usbvision->ctrl_urb_buffer;
1617 int rc;
1618
1619 if (!USBVISION_IS_OPERATIONAL(usbvision))
1620 return 0;
1621
1622 PDEBUG(DBG_FUNC, "isoc_mode %#02x", format);
1623
1624 if ((format != ISOC_MODE_YUV422)
1625 && (format != ISOC_MODE_YUV420)
1626 && (format != ISOC_MODE_COMPRESS)) {
1627 printk(KERN_ERR "usbvision: unknown video format %02x, using default YUV420",
1628 format);
1629 format = ISOC_MODE_YUV420;
1630 }
1631 value[0] = 0x0A; /* TODO: See the effect of the filter */
1632 value[1] = format; /* Sets the VO_MODE register which follows FILT_CONT */
1633 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1634 USBVISION_OP_CODE,
1635 USB_DIR_OUT | USB_TYPE_VENDOR |
1636 USB_RECIP_ENDPOINT, 0,
1637 (__u16) USBVISION_FILT_CONT, value, 2, HZ);
1638
1639 if (rc < 0) {
1640 printk(KERN_ERR "%s: ERROR=%d. USBVISION stopped - reconnect or reload driver.\n",
1641 proc, rc);
1642 }
1643 usbvision->isoc_mode = format;
1644 return rc;
1645 }
1646
1647 /*
1648 * usbvision_set_output()
1649 *
1650 */
1651
1652 int usbvision_set_output(struct usb_usbvision *usbvision, int width,
1653 int height)
1654 {
1655 int err_code = 0;
1656 int usb_width, usb_height;
1657 unsigned int frame_rate = 0, frame_drop = 0;
1658 unsigned char *value = usbvision->ctrl_urb_buffer;
1659
1660 if (!USBVISION_IS_OPERATIONAL(usbvision))
1661 return 0;
1662
1663 if (width > MAX_USB_WIDTH) {
1664 usb_width = width / 2;
1665 usbvision->stretch_width = 2;
1666 } else {
1667 usb_width = width;
1668 usbvision->stretch_width = 1;
1669 }
1670
1671 if (height > MAX_USB_HEIGHT) {
1672 usb_height = height / 2;
1673 usbvision->stretch_height = 2;
1674 } else {
1675 usb_height = height;
1676 usbvision->stretch_height = 1;
1677 }
1678
1679 RESTRICT_TO_RANGE(usb_width, MIN_FRAME_WIDTH, MAX_USB_WIDTH);
1680 usb_width &= ~(MIN_FRAME_WIDTH-1);
1681 RESTRICT_TO_RANGE(usb_height, MIN_FRAME_HEIGHT, MAX_USB_HEIGHT);
1682 usb_height &= ~(1);
1683
1684 PDEBUG(DBG_FUNC, "usb %dx%d; screen %dx%d; stretch %dx%d",
1685 usb_width, usb_height, width, height,
1686 usbvision->stretch_width, usbvision->stretch_height);
1687
1688 /* I'll not rewrite the same values */
1689 if ((usb_width != usbvision->curwidth) || (usb_height != usbvision->curheight)) {
1690 value[0] = usb_width & 0xff; /* LSB */
1691 value[1] = (usb_width >> 8) & 0x03; /* MSB */
1692 value[2] = usb_height & 0xff; /* LSB */
1693 value[3] = (usb_height >> 8) & 0x03; /* MSB */
1694
1695 err_code = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1696 USBVISION_OP_CODE,
1697 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1698 0, (__u16) USBVISION_LXSIZE_O, value, 4, HZ);
1699
1700 if (err_code < 0) {
1701 dev_err(&usbvision->dev->dev,
1702 "%s failed: error %d\n", __func__, err_code);
1703 return err_code;
1704 }
1705 usbvision->curwidth = usbvision->stretch_width * usb_width;
1706 usbvision->curheight = usbvision->stretch_height * usb_height;
1707 }
1708
1709 if (usbvision->isoc_mode == ISOC_MODE_YUV422)
1710 frame_rate = (usbvision->isoc_packet_size * 1000) / (usb_width * usb_height * 2);
1711 else if (usbvision->isoc_mode == ISOC_MODE_YUV420)
1712 frame_rate = (usbvision->isoc_packet_size * 1000) / ((usb_width * usb_height * 12) / 8);
1713 else
1714 frame_rate = FRAMERATE_MAX;
1715
1716 if (usbvision->tvnorm_id & V4L2_STD_625_50)
1717 frame_drop = frame_rate * 32 / 25 - 1;
1718 else if (usbvision->tvnorm_id & V4L2_STD_525_60)
1719 frame_drop = frame_rate * 32 / 30 - 1;
1720
1721 RESTRICT_TO_RANGE(frame_drop, FRAMERATE_MIN, FRAMERATE_MAX);
1722
1723 PDEBUG(DBG_FUNC, "frame_rate %d fps, frame_drop %d", frame_rate, frame_drop);
1724
1725 frame_drop = FRAMERATE_MAX; /* We can allow the maximum here, because dropping is controlled */
1726
1727 if (usbvision_device_data[usbvision->dev_model].codec == CODEC_WEBCAM) {
1728 if (usbvision_device_data[usbvision->dev_model].video_norm == V4L2_STD_PAL)
1729 frame_drop = 25;
1730 else
1731 frame_drop = 30;
1732 }
1733
1734 /* frame_drop = 7; => frame_phase = 1, 5, 9, 13, 17, 21, 25, 0, 4, 8, ...
1735 => frame_skip = 4;
1736 => frame_rate = (7 + 1) * 25 / 32 = 200 / 32 = 6.25;
1737
1738 frame_drop = 9; => frame_phase = 1, 5, 8, 11, 14, 17, 21, 24, 27, 1, 4, 8, ...
1739 => frame_skip = 4, 3, 3, 3, 3, 4, 3, 3, 3, 3, 4, ...
1740 => frame_rate = (9 + 1) * 25 / 32 = 250 / 32 = 7.8125;
1741 */
1742 err_code = usbvision_write_reg(usbvision, USBVISION_FRM_RATE, frame_drop);
1743 return err_code;
1744 }
1745
1746
1747 /*
1748 * usbvision_frames_alloc
1749 * allocate the required frames
1750 */
1751 int usbvision_frames_alloc(struct usb_usbvision *usbvision, int number_of_frames)
1752 {
1753 int i;
1754
1755 /* needs to be page aligned cause the buffers can be mapped individually! */
1756 usbvision->max_frame_size = PAGE_ALIGN(usbvision->curwidth *
1757 usbvision->curheight *
1758 usbvision->palette.bytes_per_pixel);
1759
1760 /* Try to do my best to allocate the frames the user want in the remaining memory */
1761 usbvision->num_frames = number_of_frames;
1762 while (usbvision->num_frames > 0) {
1763 usbvision->fbuf_size = usbvision->num_frames * usbvision->max_frame_size;
1764 usbvision->fbuf = usbvision_rvmalloc(usbvision->fbuf_size);
1765 if (usbvision->fbuf)
1766 break;
1767 usbvision->num_frames--;
1768 }
1769
1770 /* Allocate all buffers */
1771 for (i = 0; i < usbvision->num_frames; i++) {
1772 usbvision->frame[i].index = i;
1773 usbvision->frame[i].grabstate = frame_state_unused;
1774 usbvision->frame[i].data = usbvision->fbuf +
1775 i * usbvision->max_frame_size;
1776 /*
1777 * Set default sizes for read operation.
1778 */
1779 usbvision->stretch_width = 1;
1780 usbvision->stretch_height = 1;
1781 usbvision->frame[i].width = usbvision->curwidth;
1782 usbvision->frame[i].height = usbvision->curheight;
1783 usbvision->frame[i].bytes_read = 0;
1784 }
1785 PDEBUG(DBG_FUNC, "allocated %d frames (%d bytes per frame)",
1786 usbvision->num_frames, usbvision->max_frame_size);
1787 return usbvision->num_frames;
1788 }
1789
1790 /*
1791 * usbvision_frames_free
1792 * frees memory allocated for the frames
1793 */
1794 void usbvision_frames_free(struct usb_usbvision *usbvision)
1795 {
1796 /* Have to free all that memory */
1797 PDEBUG(DBG_FUNC, "free %d frames", usbvision->num_frames);
1798
1799 if (usbvision->fbuf != NULL) {
1800 usbvision_rvfree(usbvision->fbuf, usbvision->fbuf_size);
1801 usbvision->fbuf = NULL;
1802
1803 usbvision->num_frames = 0;
1804 }
1805 }
1806 /*
1807 * usbvision_empty_framequeues()
1808 * prepare queues for incoming and outgoing frames
1809 */
1810 void usbvision_empty_framequeues(struct usb_usbvision *usbvision)
1811 {
1812 u32 i;
1813
1814 INIT_LIST_HEAD(&(usbvision->inqueue));
1815 INIT_LIST_HEAD(&(usbvision->outqueue));
1816
1817 for (i = 0; i < USBVISION_NUMFRAMES; i++) {
1818 usbvision->frame[i].grabstate = frame_state_unused;
1819 usbvision->frame[i].bytes_read = 0;
1820 }
1821 }
1822
1823 /*
1824 * usbvision_stream_interrupt()
1825 * stops streaming
1826 */
1827 int usbvision_stream_interrupt(struct usb_usbvision *usbvision)
1828 {
1829 int ret = 0;
1830
1831 /* stop reading from the device */
1832
1833 usbvision->streaming = stream_interrupt;
1834 ret = wait_event_timeout(usbvision->wait_stream,
1835 (usbvision->streaming == stream_idle),
1836 msecs_to_jiffies(USBVISION_NUMSBUF*USBVISION_URB_FRAMES));
1837 return ret;
1838 }
1839
1840 /*
1841 * usbvision_set_compress_params()
1842 *
1843 */
1844
1845 static int usbvision_set_compress_params(struct usb_usbvision *usbvision)
1846 {
1847 static const char proc[] = "usbvision_set_compression_params: ";
1848 int rc;
1849 unsigned char *value = usbvision->ctrl_urb_buffer;
1850
1851 value[0] = 0x0F; /* Intra-Compression cycle */
1852 value[1] = 0x01; /* Reg.45 one line per strip */
1853 value[2] = 0x00; /* Reg.46 Force intra mode on all new frames */
1854 value[3] = 0x00; /* Reg.47 FORCE_UP <- 0 normal operation (not force) */
1855 value[4] = 0xA2; /* Reg.48 BUF_THR I'm not sure if this does something in not compressed mode. */
1856 value[5] = 0x00; /* Reg.49 DVI_YUV This has nothing to do with compression */
1857
1858 /* caught values for NT1004 */
1859 /* value[0] = 0xFF; Never apply intra mode automatically */
1860 /* value[1] = 0xF1; Use full frame height for virtual strip width; One line per strip */
1861 /* value[2] = 0x01; Force intra mode on all new frames */
1862 /* value[3] = 0x00; Strip size 400 Bytes; do not force up */
1863 /* value[4] = 0xA2; */
1864 if (!USBVISION_IS_OPERATIONAL(usbvision))
1865 return 0;
1866
1867 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1868 USBVISION_OP_CODE,
1869 USB_DIR_OUT | USB_TYPE_VENDOR |
1870 USB_RECIP_ENDPOINT, 0,
1871 (__u16) USBVISION_INTRA_CYC, value, 5, HZ);
1872
1873 if (rc < 0) {
1874 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - reconnect or reload driver.\n",
1875 proc, rc);
1876 return rc;
1877 }
1878
1879 if (usbvision->bridge_type == BRIDGE_NT1004) {
1880 value[0] = 20; /* PCM Threshold 1 */
1881 value[1] = 12; /* PCM Threshold 2 */
1882 value[2] = 255; /* Distortion Threshold inter */
1883 value[3] = 255; /* Distortion Threshold intra */
1884 value[4] = 43; /* Max Distortion inter */
1885 value[5] = 43; /* Max Distortion intra */
1886 } else {
1887 value[0] = 20; /* PCM Threshold 1 */
1888 value[1] = 12; /* PCM Threshold 2 */
1889 value[2] = 255; /* Distortion Threshold d7-d0 */
1890 value[3] = 0; /* Distortion Threshold d11-d8 */
1891 value[4] = 43; /* Max Distortion d7-d0 */
1892 value[5] = 0; /* Max Distortion d8 */
1893 }
1894
1895 if (!USBVISION_IS_OPERATIONAL(usbvision))
1896 return 0;
1897
1898 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1899 USBVISION_OP_CODE,
1900 USB_DIR_OUT | USB_TYPE_VENDOR |
1901 USB_RECIP_ENDPOINT, 0,
1902 (__u16) USBVISION_PCM_THR1, value, 6, HZ);
1903
1904 if (rc < 0) {
1905 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - reconnect or reload driver.\n",
1906 proc, rc);
1907 }
1908 return rc;
1909 }
1910
1911
1912 /*
1913 * usbvision_set_input()
1914 *
1915 * Set the input (saa711x, ...) size x y and other misc input params
1916 * I've no idea if this parameters are right
1917 *
1918 */
1919 int usbvision_set_input(struct usb_usbvision *usbvision)
1920 {
1921 static const char proc[] = "usbvision_set_input: ";
1922 int rc;
1923 unsigned char *value = usbvision->ctrl_urb_buffer;
1924 unsigned char dvi_yuv_value;
1925
1926 if (!USBVISION_IS_OPERATIONAL(usbvision))
1927 return 0;
1928
1929 /* Set input format expected from decoder*/
1930 if (usbvision_device_data[usbvision->dev_model].vin_reg1_override) {
1931 value[0] = usbvision_device_data[usbvision->dev_model].vin_reg1;
1932 } else if (usbvision_device_data[usbvision->dev_model].codec == CODEC_SAA7113) {
1933 /* SAA7113 uses 8 bit output */
1934 value[0] = USBVISION_8_422_SYNC;
1935 } else {
1936 /* I'm sure only about d2-d0 [010] 16 bit 4:2:2 using sync pulses
1937 * as that is how saa7111 is configured */
1938 value[0] = USBVISION_16_422_SYNC;
1939 /* | USBVISION_VSNC_POL | USBVISION_VCLK_POL);*/
1940 }
1941
1942 rc = usbvision_write_reg(usbvision, USBVISION_VIN_REG1, value[0]);
1943 if (rc < 0) {
1944 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - reconnect or reload driver.\n",
1945 proc, rc);
1946 return rc;
1947 }
1948
1949
1950 if (usbvision->tvnorm_id & V4L2_STD_PAL) {
1951 value[0] = 0xC0;
1952 value[1] = 0x02; /* 0x02C0 -> 704 Input video line length */
1953 value[2] = 0x20;
1954 value[3] = 0x01; /* 0x0120 -> 288 Input video n. of lines */
1955 value[4] = 0x60;
1956 value[5] = 0x00; /* 0x0060 -> 96 Input video h offset */
1957 value[6] = 0x16;
1958 value[7] = 0x00; /* 0x0016 -> 22 Input video v offset */
1959 } else if (usbvision->tvnorm_id & V4L2_STD_SECAM) {
1960 value[0] = 0xC0;
1961 value[1] = 0x02; /* 0x02C0 -> 704 Input video line length */
1962 value[2] = 0x20;
1963 value[3] = 0x01; /* 0x0120 -> 288 Input video n. of lines */
1964 value[4] = 0x01;
1965 value[5] = 0x00; /* 0x0001 -> 01 Input video h offset */
1966 value[6] = 0x01;
1967 value[7] = 0x00; /* 0x0001 -> 01 Input video v offset */
1968 } else { /* V4L2_STD_NTSC */
1969 value[0] = 0xD0;
1970 value[1] = 0x02; /* 0x02D0 -> 720 Input video line length */
1971 value[2] = 0xF0;
1972 value[3] = 0x00; /* 0x00F0 -> 240 Input video number of lines */
1973 value[4] = 0x50;
1974 value[5] = 0x00; /* 0x0050 -> 80 Input video h offset */
1975 value[6] = 0x10;
1976 value[7] = 0x00; /* 0x0010 -> 16 Input video v offset */
1977 }
1978
1979 /* webcam is only 480 pixels wide, both PAL and NTSC version */
1980 if (usbvision_device_data[usbvision->dev_model].codec == CODEC_WEBCAM) {
1981 value[0] = 0xe0;
1982 value[1] = 0x01; /* 0x01E0 -> 480 Input video line length */
1983 }
1984
1985 if (usbvision_device_data[usbvision->dev_model].x_offset >= 0) {
1986 value[4] = usbvision_device_data[usbvision->dev_model].x_offset & 0xff;
1987 value[5] = (usbvision_device_data[usbvision->dev_model].x_offset & 0x0300) >> 8;
1988 }
1989
1990 if (adjust_x_offset != -1) {
1991 value[4] = adjust_x_offset & 0xff;
1992 value[5] = (adjust_x_offset & 0x0300) >> 8;
1993 }
1994
1995 if (usbvision_device_data[usbvision->dev_model].y_offset >= 0) {
1996 value[6] = usbvision_device_data[usbvision->dev_model].y_offset & 0xff;
1997 value[7] = (usbvision_device_data[usbvision->dev_model].y_offset & 0x0300) >> 8;
1998 }
1999
2000 if (adjust_y_offset != -1) {
2001 value[6] = adjust_y_offset & 0xff;
2002 value[7] = (adjust_y_offset & 0x0300) >> 8;
2003 }
2004
2005 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2006 USBVISION_OP_CODE, /* USBVISION specific code */
2007 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0,
2008 (__u16) USBVISION_LXSIZE_I, value, 8, HZ);
2009 if (rc < 0) {
2010 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - reconnect or reload driver.\n",
2011 proc, rc);
2012 return rc;
2013 }
2014
2015
2016 dvi_yuv_value = 0x00; /* U comes after V, Ya comes after U/V, Yb comes after Yb */
2017
2018 if (usbvision_device_data[usbvision->dev_model].dvi_yuv_override) {
2019 dvi_yuv_value = usbvision_device_data[usbvision->dev_model].dvi_yuv;
2020 } else if (usbvision_device_data[usbvision->dev_model].codec == CODEC_SAA7113) {
2021 /* This changes as the fine sync control changes. Further investigation necessary */
2022 dvi_yuv_value = 0x06;
2023 }
2024
2025 return usbvision_write_reg(usbvision, USBVISION_DVI_YUV, dvi_yuv_value);
2026 }
2027
2028
2029 /*
2030 * usbvision_set_dram_settings()
2031 *
2032 * Set the buffer address needed by the usbvision dram to operate
2033 * This values has been taken with usbsnoop.
2034 *
2035 */
2036
2037 static int usbvision_set_dram_settings(struct usb_usbvision *usbvision)
2038 {
2039 unsigned char *value = usbvision->ctrl_urb_buffer;
2040 int rc;
2041
2042 if (usbvision->isoc_mode == ISOC_MODE_COMPRESS) {
2043 value[0] = 0x42;
2044 value[1] = 0x71;
2045 value[2] = 0xff;
2046 value[3] = 0x00;
2047 value[4] = 0x98;
2048 value[5] = 0xe0;
2049 value[6] = 0x71;
2050 value[7] = 0xff;
2051 /* UR: 0x0E200-0x3FFFF = 204288 Words (1 Word = 2 Byte) */
2052 /* FDL: 0x00000-0x0E099 = 57498 Words */
2053 /* VDW: 0x0E3FF-0x3FFFF */
2054 } else {
2055 value[0] = 0x42;
2056 value[1] = 0x00;
2057 value[2] = 0xff;
2058 value[3] = 0x00;
2059 value[4] = 0x00;
2060 value[5] = 0x00;
2061 value[6] = 0x00;
2062 value[7] = 0xff;
2063 }
2064 /* These are the values of the address of the video buffer,
2065 * they have to be loaded into the USBVISION_DRM_PRM1-8
2066 *
2067 * Start address of video output buffer for read: drm_prm1-2 -> 0x00000
2068 * End address of video output buffer for read: drm_prm1-3 -> 0x1ffff
2069 * Start address of video frame delay buffer: drm_prm1-4 -> 0x20000
2070 * Only used in compressed mode
2071 * End address of video frame delay buffer: drm_prm1-5-6 -> 0x3ffff
2072 * Only used in compressed mode
2073 * Start address of video output buffer for write: drm_prm1-7 -> 0x00000
2074 * End address of video output buffer for write: drm_prm1-8 -> 0x1ffff
2075 */
2076
2077 if (!USBVISION_IS_OPERATIONAL(usbvision))
2078 return 0;
2079
2080 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2081 USBVISION_OP_CODE, /* USBVISION specific code */
2082 USB_DIR_OUT | USB_TYPE_VENDOR |
2083 USB_RECIP_ENDPOINT, 0,
2084 (__u16) USBVISION_DRM_PRM1, value, 8, HZ);
2085
2086 if (rc < 0) {
2087 dev_err(&usbvision->dev->dev, "%s: ERROR=%d\n", __func__, rc);
2088 return rc;
2089 }
2090
2091 /* Restart the video buffer logic */
2092 rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, USBVISION_RES_UR |
2093 USBVISION_RES_FDL | USBVISION_RES_VDW);
2094 if (rc < 0)
2095 return rc;
2096 rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, 0x00);
2097
2098 return rc;
2099 }
2100
2101 /*
2102 * ()
2103 *
2104 * Power on the device, enables suspend-resume logic
2105 * & reset the isoc End-Point
2106 *
2107 */
2108
2109 int usbvision_power_on(struct usb_usbvision *usbvision)
2110 {
2111 int err_code = 0;
2112
2113 PDEBUG(DBG_FUNC, "");
2114
2115 usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
2116 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2117 USBVISION_SSPND_EN | USBVISION_RES2);
2118
2119 if (usbvision_device_data[usbvision->dev_model].codec == CODEC_WEBCAM) {
2120 usbvision_write_reg(usbvision, USBVISION_VIN_REG1,
2121 USBVISION_16_422_SYNC | USBVISION_HVALID_PO);
2122 usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
2123 USBVISION_NOHVALID | USBVISION_KEEP_BLANK);
2124 }
2125 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2126 USBVISION_SSPND_EN | USBVISION_PWR_VID);
2127 mdelay(10);
2128 err_code = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2129 USBVISION_SSPND_EN | USBVISION_PWR_VID | USBVISION_RES2);
2130 if (err_code == 1)
2131 usbvision->power = 1;
2132 PDEBUG(DBG_FUNC, "%s: err_code %d", (err_code < 0) ? "ERROR" : "power is on", err_code);
2133 return err_code;
2134 }
2135
2136
2137 /*
2138 * usbvision_begin_streaming()
2139 * Sure you have to put bit 7 to 0, if not incoming frames are dropped, but no
2140 * idea about the rest
2141 */
2142 int usbvision_begin_streaming(struct usb_usbvision *usbvision)
2143 {
2144 if (usbvision->isoc_mode == ISOC_MODE_COMPRESS)
2145 usbvision_init_compression(usbvision);
2146 return usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
2147 USBVISION_NOHVALID | usbvision->vin_reg2_preset);
2148 }
2149
2150 /*
2151 * usbvision_restart_isoc()
2152 * Not sure yet if touching here PWR_REG make loose the config
2153 */
2154
2155 int usbvision_restart_isoc(struct usb_usbvision *usbvision)
2156 {
2157 int ret;
2158
2159 ret = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2160 USBVISION_SSPND_EN | USBVISION_PWR_VID);
2161 if (ret < 0)
2162 return ret;
2163 ret = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2164 USBVISION_SSPND_EN | USBVISION_PWR_VID |
2165 USBVISION_RES2);
2166 if (ret < 0)
2167 return ret;
2168 ret = usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
2169 USBVISION_KEEP_BLANK | USBVISION_NOHVALID |
2170 usbvision->vin_reg2_preset);
2171 if (ret < 0)
2172 return ret;
2173
2174 /* TODO: schedule timeout */
2175 while ((usbvision_read_reg(usbvision, USBVISION_STATUS_REG) & 0x01) != 1)
2176 ;
2177
2178 return 0;
2179 }
2180
2181 int usbvision_audio_off(struct usb_usbvision *usbvision)
2182 {
2183 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, USBVISION_AUDIO_MUTE) < 0) {
2184 printk(KERN_ERR "usbvision_audio_off: can't write reg\n");
2185 return -1;
2186 }
2187 usbvision->audio_mute = 0;
2188 usbvision->audio_channel = USBVISION_AUDIO_MUTE;
2189 return 0;
2190 }
2191
2192 int usbvision_set_audio(struct usb_usbvision *usbvision, int audio_channel)
2193 {
2194 if (!usbvision->audio_mute) {
2195 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, audio_channel) < 0) {
2196 printk(KERN_ERR "usbvision_set_audio: can't write iopin register for audio switching\n");
2197 return -1;
2198 }
2199 }
2200 usbvision->audio_channel = audio_channel;
2201 return 0;
2202 }
2203
2204 int usbvision_setup(struct usb_usbvision *usbvision, int format)
2205 {
2206 if (usbvision_device_data[usbvision->dev_model].codec == CODEC_WEBCAM)
2207 usbvision_init_webcam(usbvision);
2208 usbvision_set_video_format(usbvision, format);
2209 usbvision_set_dram_settings(usbvision);
2210 usbvision_set_compress_params(usbvision);
2211 usbvision_set_input(usbvision);
2212 usbvision_set_output(usbvision, MAX_USB_WIDTH, MAX_USB_HEIGHT);
2213 usbvision_restart_isoc(usbvision);
2214
2215 /* cosas del PCM */
2216 return USBVISION_IS_OPERATIONAL(usbvision);
2217 }
2218
2219 int usbvision_set_alternate(struct usb_usbvision *dev)
2220 {
2221 int err_code, prev_alt = dev->iface_alt;
2222 int i;
2223
2224 dev->iface_alt = 0;
2225 for (i = 0; i < dev->num_alt; i++)
2226 if (dev->alt_max_pkt_size[i] > dev->alt_max_pkt_size[dev->iface_alt])
2227 dev->iface_alt = i;
2228
2229 if (dev->iface_alt != prev_alt) {
2230 dev->isoc_packet_size = dev->alt_max_pkt_size[dev->iface_alt];
2231 PDEBUG(DBG_FUNC, "setting alternate %d with max_packet_size=%u",
2232 dev->iface_alt, dev->isoc_packet_size);
2233 err_code = usb_set_interface(dev->dev, dev->iface, dev->iface_alt);
2234 if (err_code < 0) {
2235 dev_err(&dev->dev->dev,
2236 "cannot change alternate number to %d (error=%i)\n",
2237 dev->iface_alt, err_code);
2238 return err_code;
2239 }
2240 }
2241
2242 PDEBUG(DBG_ISOC, "ISO Packet Length:%d", dev->isoc_packet_size);
2243
2244 return 0;
2245 }
2246
2247 /*
2248 * usbvision_init_isoc()
2249 *
2250 */
2251 int usbvision_init_isoc(struct usb_usbvision *usbvision)
2252 {
2253 struct usb_device *dev = usbvision->dev;
2254 int buf_idx, err_code, reg_value;
2255 int sb_size;
2256
2257 if (!USBVISION_IS_OPERATIONAL(usbvision))
2258 return -EFAULT;
2259
2260 usbvision->cur_frame = NULL;
2261 scratch_reset(usbvision);
2262
2263 /* Alternate interface 1 is is the biggest frame size */
2264 err_code = usbvision_set_alternate(usbvision);
2265 if (err_code < 0) {
2266 usbvision->last_error = err_code;
2267 return -EBUSY;
2268 }
2269 sb_size = USBVISION_URB_FRAMES * usbvision->isoc_packet_size;
2270
2271 reg_value = (16 - usbvision_read_reg(usbvision,
2272 USBVISION_ALTER_REG)) & 0x0F;
2273
2274 usbvision->usb_bandwidth = reg_value >> 1;
2275 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec",
2276 usbvision->usb_bandwidth);
2277
2278
2279
2280 /* We double buffer the Iso lists */
2281
2282 for (buf_idx = 0; buf_idx < USBVISION_NUMSBUF; buf_idx++) {
2283 int j, k;
2284 struct urb *urb;
2285
2286 urb = usb_alloc_urb(USBVISION_URB_FRAMES, GFP_KERNEL);
2287 if (urb == NULL)
2288 return -ENOMEM;
2289 usbvision->sbuf[buf_idx].urb = urb;
2290 usbvision->sbuf[buf_idx].data =
2291 usb_alloc_coherent(usbvision->dev,
2292 sb_size,
2293 GFP_KERNEL,
2294 &urb->transfer_dma);
2295 if (!usbvision->sbuf[buf_idx].data)
2296 return -ENOMEM;
2297
2298 urb->dev = dev;
2299 urb->context = usbvision;
2300 urb->pipe = usb_rcvisocpipe(dev, usbvision->video_endp);
2301 urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
2302 urb->interval = 1;
2303 urb->transfer_buffer = usbvision->sbuf[buf_idx].data;
2304 urb->complete = usbvision_isoc_irq;
2305 urb->number_of_packets = USBVISION_URB_FRAMES;
2306 urb->transfer_buffer_length =
2307 usbvision->isoc_packet_size * USBVISION_URB_FRAMES;
2308 for (j = k = 0; j < USBVISION_URB_FRAMES; j++,
2309 k += usbvision->isoc_packet_size) {
2310 urb->iso_frame_desc[j].offset = k;
2311 urb->iso_frame_desc[j].length =
2312 usbvision->isoc_packet_size;
2313 }
2314 }
2315
2316 /* Submit all URBs */
2317 for (buf_idx = 0; buf_idx < USBVISION_NUMSBUF; buf_idx++) {
2318 err_code = usb_submit_urb(usbvision->sbuf[buf_idx].urb,
2319 GFP_KERNEL);
2320 if (err_code) {
2321 dev_err(&usbvision->dev->dev,
2322 "%s: usb_submit_urb(%d) failed: error %d\n",
2323 __func__, buf_idx, err_code);
2324 }
2325 }
2326
2327 usbvision->streaming = stream_idle;
2328 PDEBUG(DBG_ISOC, "%s: streaming=1 usbvision->video_endp=$%02x",
2329 __func__,
2330 usbvision->video_endp);
2331 return 0;
2332 }
2333
2334 /*
2335 * usbvision_stop_isoc()
2336 *
2337 * This procedure stops streaming and deallocates URBs. Then it
2338 * activates zero-bandwidth alt. setting of the video interface.
2339 *
2340 */
2341 void usbvision_stop_isoc(struct usb_usbvision *usbvision)
2342 {
2343 int buf_idx, err_code, reg_value;
2344 int sb_size = USBVISION_URB_FRAMES * usbvision->isoc_packet_size;
2345
2346 if ((usbvision->streaming == stream_off) || (usbvision->dev == NULL))
2347 return;
2348
2349 /* Unschedule all of the iso td's */
2350 for (buf_idx = 0; buf_idx < USBVISION_NUMSBUF; buf_idx++) {
2351 usb_kill_urb(usbvision->sbuf[buf_idx].urb);
2352 if (usbvision->sbuf[buf_idx].data) {
2353 usb_free_coherent(usbvision->dev,
2354 sb_size,
2355 usbvision->sbuf[buf_idx].data,
2356 usbvision->sbuf[buf_idx].urb->transfer_dma);
2357 }
2358 usb_free_urb(usbvision->sbuf[buf_idx].urb);
2359 usbvision->sbuf[buf_idx].urb = NULL;
2360 }
2361
2362 PDEBUG(DBG_ISOC, "%s: streaming=stream_off\n", __func__);
2363 usbvision->streaming = stream_off;
2364
2365 if (!usbvision->remove_pending) {
2366 /* Set packet size to 0 */
2367 usbvision->iface_alt = 0;
2368 err_code = usb_set_interface(usbvision->dev, usbvision->iface,
2369 usbvision->iface_alt);
2370 if (err_code < 0) {
2371 dev_err(&usbvision->dev->dev,
2372 "%s: usb_set_interface() failed: error %d\n",
2373 __func__, err_code);
2374 usbvision->last_error = err_code;
2375 }
2376 reg_value = (16-usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F;
2377 usbvision->isoc_packet_size =
2378 (reg_value == 0) ? 0 : (reg_value * 64) - 1;
2379 PDEBUG(DBG_ISOC, "ISO Packet Length:%d",
2380 usbvision->isoc_packet_size);
2381
2382 usbvision->usb_bandwidth = reg_value >> 1;
2383 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec",
2384 usbvision->usb_bandwidth);
2385 }
2386 }
2387
2388 int usbvision_muxsel(struct usb_usbvision *usbvision, int channel)
2389 {
2390 /* inputs #0 and #3 are constant for every SAA711x. */
2391 /* inputs #1 and #2 are variable for SAA7111 and SAA7113 */
2392 int mode[4] = { SAA7115_COMPOSITE0, 0, 0, SAA7115_COMPOSITE3 };
2393 int audio[] = { 1, 0, 0, 0 };
2394 /* channel 0 is TV with audiochannel 1 (tuner mono) */
2395 /* channel 1 is Composite with audio channel 0 (line in) */
2396 /* channel 2 is S-Video with audio channel 0 (line in) */
2397 /* channel 3 is additional video inputs to the device with audio channel 0 (line in) */
2398
2399 RESTRICT_TO_RANGE(channel, 0, usbvision->video_inputs);
2400 usbvision->ctl_input = channel;
2401
2402 /* set the new channel */
2403 /* Regular USB TV Tuners -> channel: 0 = Television, 1 = Composite, 2 = S-Video */
2404 /* Four video input devices -> channel: 0 = Chan White, 1 = Chan Green, 2 = Chan Yellow, 3 = Chan Red */
2405
2406 switch (usbvision_device_data[usbvision->dev_model].codec) {
2407 case CODEC_SAA7113:
2408 mode[1] = SAA7115_COMPOSITE2;
2409 if (switch_svideo_input) {
2410 /* To handle problems with S-Video Input for
2411 * some devices. Use switch_svideo_input
2412 * parameter when loading the module.*/
2413 mode[2] = SAA7115_COMPOSITE1;
2414 } else {
2415 mode[2] = SAA7115_SVIDEO1;
2416 }
2417 break;
2418 case CODEC_SAA7111:
2419 default:
2420 /* modes for saa7111 */
2421 mode[1] = SAA7115_COMPOSITE1;
2422 mode[2] = SAA7115_SVIDEO1;
2423 break;
2424 }
2425 call_all(usbvision, video, s_routing, mode[channel], 0, 0);
2426 usbvision_set_audio(usbvision, audio[channel]);
2427 return 0;
2428 }
Linux with added FPC-III support