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[pohmelfs.git] / drivers / media / video / usbvision / usbvision-core.c
blobf344411a457852e389581e0dd99df8646883f815
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/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 static const int max_imgwidth = MAX_FRAME_WIDTH;
92 static const int max_imgheight = MAX_FRAME_HEIGHT;
93 static const int min_imgwidth = MIN_FRAME_WIDTH;
94 static const int min_imgheight = MIN_FRAME_HEIGHT;
95
96 /* The value of 'scratch_buf_size' affects quality of the picture
97 * in many ways. Shorter buffers may cause loss of data when client
98 * is too slow. Larger buffers are memory-consuming and take longer
99 * to work with. This setting can be adjusted, but the default value
100 * should be OK for most desktop users.
101 */
102 #define DEFAULT_SCRATCH_BUF_SIZE (0x20000) /* 128kB memory scratch buffer */
103 static const int scratch_buf_size = DEFAULT_SCRATCH_BUF_SIZE;
104
105 /* Function prototypes */
106 static int usbvision_request_intra(struct usb_usbvision *usbvision);
107 static int usbvision_unrequest_intra(struct usb_usbvision *usbvision);
108 static int usbvision_adjust_compression(struct usb_usbvision *usbvision);
109 static int usbvision_measure_bandwidth(struct usb_usbvision *usbvision);
110
111 /*******************************/
112 /* Memory management functions */
113 /*******************************/
114
115 /*
116 * Here we want the physical address of the memory.
117 * This is used when initializing the contents of the area.
118 */
119
120 static void *usbvision_rvmalloc(unsigned long size)
121 {
122 void *mem;
123 unsigned long adr;
124
125 size = PAGE_ALIGN(size);
126 mem = vmalloc_32(size);
127 if (!mem)
128 return NULL;
129
130 memset(mem, 0, size); /* Clear the ram out, no junk to the user */
131 adr = (unsigned long) mem;
132 while (size > 0) {
133 SetPageReserved(vmalloc_to_page((void *)adr));
134 adr += PAGE_SIZE;
135 size -= PAGE_SIZE;
136 }
137
138 return mem;
139 }
140
141 static void usbvision_rvfree(void *mem, unsigned long size)
142 {
143 unsigned long adr;
144
145 if (!mem)
146 return;
147
148 size = PAGE_ALIGN(size);
149
150 adr = (unsigned long) mem;
151 while ((long) size > 0) {
152 ClearPageReserved(vmalloc_to_page((void *)adr));
153 adr += PAGE_SIZE;
154 size -= PAGE_SIZE;
155 }
156
157 vfree(mem);
158 }
159
160
161 #if ENABLE_HEXDUMP
162 static void usbvision_hexdump(const unsigned char *data, int len)
163 {
164 char tmp[80];
165 int i, k;
166
167 for (i = k = 0; len > 0; i++, len--) {
168 if (i > 0 && (i % 16 == 0)) {
169 printk("%s\n", tmp);
170 k = 0;
171 }
172 k += sprintf(&tmp[k], "%02x ", data[i]);
173 }
174 if (k > 0)
175 printk(KERN_CONT "%s\n", tmp);
176 }
177 #endif
178
179 /********************************
180 * scratch ring buffer handling
181 ********************************/
182 static int scratch_len(struct usb_usbvision *usbvision) /* This returns the amount of data actually in the buffer */
183 {
184 int len = usbvision->scratch_write_ptr - usbvision->scratch_read_ptr;
185
186 if (len < 0)
187 len += scratch_buf_size;
188 PDEBUG(DBG_SCRATCH, "scratch_len() = %d\n", len);
189
190 return len;
191 }
192
193
194 /* This returns the free space left in the buffer */
195 static int scratch_free(struct usb_usbvision *usbvision)
196 {
197 int free = usbvision->scratch_read_ptr - usbvision->scratch_write_ptr;
198 if (free <= 0)
199 free += scratch_buf_size;
200 if (free) {
201 free -= 1; /* at least one byte in the buffer must */
202 /* left blank, otherwise there is no chance to differ between full and empty */
203 }
204 PDEBUG(DBG_SCRATCH, "return %d\n", free);
205
206 return free;
207 }
208
209
210 /* This puts data into the buffer */
211 static int scratch_put(struct usb_usbvision *usbvision, unsigned char *data,
212 int len)
213 {
214 int len_part;
215
216 if (usbvision->scratch_write_ptr + len < scratch_buf_size) {
217 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len);
218 usbvision->scratch_write_ptr += len;
219 } else {
220 len_part = scratch_buf_size - usbvision->scratch_write_ptr;
221 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len_part);
222 if (len == len_part) {
223 usbvision->scratch_write_ptr = 0; /* just set write_ptr to zero */
224 } else {
225 memcpy(usbvision->scratch, data + len_part, len - len_part);
226 usbvision->scratch_write_ptr = len - len_part;
227 }
228 }
229
230 PDEBUG(DBG_SCRATCH, "len=%d, new write_ptr=%d\n", len, usbvision->scratch_write_ptr);
231
232 return len;
233 }
234
235 /* This marks the write_ptr as position of new frame header */
236 static void scratch_mark_header(struct usb_usbvision *usbvision)
237 {
238 PDEBUG(DBG_SCRATCH, "header at write_ptr=%d\n", usbvision->scratch_headermarker_write_ptr);
239
240 usbvision->scratch_headermarker[usbvision->scratch_headermarker_write_ptr] =
241 usbvision->scratch_write_ptr;
242 usbvision->scratch_headermarker_write_ptr += 1;
243 usbvision->scratch_headermarker_write_ptr %= USBVISION_NUM_HEADERMARKER;
244 }
245
246 /* This gets data from the buffer at the given "ptr" position */
247 static int scratch_get_extra(struct usb_usbvision *usbvision,
248 unsigned char *data, int *ptr, int len)
249 {
250 int len_part;
251
252 if (*ptr + len < scratch_buf_size) {
253 memcpy(data, usbvision->scratch + *ptr, len);
254 *ptr += len;
255 } else {
256 len_part = scratch_buf_size - *ptr;
257 memcpy(data, usbvision->scratch + *ptr, len_part);
258 if (len == len_part) {
259 *ptr = 0; /* just set the y_ptr to zero */
260 } else {
261 memcpy(data + len_part, usbvision->scratch, len - len_part);
262 *ptr = len - len_part;
263 }
264 }
265
266 PDEBUG(DBG_SCRATCH, "len=%d, new ptr=%d\n", len, *ptr);
267
268 return len;
269 }
270
271
272 /* This sets the scratch extra read pointer */
273 static void scratch_set_extra_ptr(struct usb_usbvision *usbvision, int *ptr,
274 int len)
275 {
276 *ptr = (usbvision->scratch_read_ptr + len) % scratch_buf_size;
277
278 PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
279 }
280
281
282 /* This increments the scratch extra read pointer */
283 static void scratch_inc_extra_ptr(int *ptr, int len)
284 {
285 *ptr = (*ptr + len) % scratch_buf_size;
286
287 PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
288 }
289
290
291 /* This gets data from the buffer */
292 static int scratch_get(struct usb_usbvision *usbvision, unsigned char *data,
293 int len)
294 {
295 int len_part;
296
297 if (usbvision->scratch_read_ptr + len < scratch_buf_size) {
298 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len);
299 usbvision->scratch_read_ptr += len;
300 } else {
301 len_part = scratch_buf_size - usbvision->scratch_read_ptr;
302 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len_part);
303 if (len == len_part) {
304 usbvision->scratch_read_ptr = 0; /* just set the read_ptr to zero */
305 } else {
306 memcpy(data + len_part, usbvision->scratch, len - len_part);
307 usbvision->scratch_read_ptr = len - len_part;
308 }
309 }
310
311 PDEBUG(DBG_SCRATCH, "len=%d, new read_ptr=%d\n", len, usbvision->scratch_read_ptr);
312
313 return len;
314 }
315
316
317 /* This sets read pointer to next header and returns it */
318 static int scratch_get_header(struct usb_usbvision *usbvision,
319 struct usbvision_frame_header *header)
320 {
321 int err_code = 0;
322
323 PDEBUG(DBG_SCRATCH, "from read_ptr=%d", usbvision->scratch_headermarker_read_ptr);
324
325 while (usbvision->scratch_headermarker_write_ptr -
326 usbvision->scratch_headermarker_read_ptr != 0) {
327 usbvision->scratch_read_ptr =
328 usbvision->scratch_headermarker[usbvision->scratch_headermarker_read_ptr];
329 usbvision->scratch_headermarker_read_ptr += 1;
330 usbvision->scratch_headermarker_read_ptr %= USBVISION_NUM_HEADERMARKER;
331 scratch_get(usbvision, (unsigned char *)header, USBVISION_HEADER_LENGTH);
332 if ((header->magic_1 == USBVISION_MAGIC_1)
333 && (header->magic_2 == USBVISION_MAGIC_2)
334 && (header->header_length == USBVISION_HEADER_LENGTH)) {
335 err_code = USBVISION_HEADER_LENGTH;
336 header->frame_width = header->frame_width_lo + (header->frame_width_hi << 8);
337 header->frame_height = header->frame_height_lo + (header->frame_height_hi << 8);
338 break;
339 }
340 }
341
342 return err_code;
343 }
344
345
346 /* This removes len bytes of old data from the buffer */
347 static void scratch_rm_old(struct usb_usbvision *usbvision, int len)
348 {
349 usbvision->scratch_read_ptr += len;
350 usbvision->scratch_read_ptr %= scratch_buf_size;
351 PDEBUG(DBG_SCRATCH, "read_ptr is now %d\n", usbvision->scratch_read_ptr);
352 }
353
354
355 /* This resets the buffer - kills all data in it too */
356 static void scratch_reset(struct usb_usbvision *usbvision)
357 {
358 PDEBUG(DBG_SCRATCH, "\n");
359
360 usbvision->scratch_read_ptr = 0;
361 usbvision->scratch_write_ptr = 0;
362 usbvision->scratch_headermarker_read_ptr = 0;
363 usbvision->scratch_headermarker_write_ptr = 0;
364 usbvision->isocstate = isoc_state_no_frame;
365 }
366
367 int usbvision_scratch_alloc(struct usb_usbvision *usbvision)
368 {
369 usbvision->scratch = vmalloc_32(scratch_buf_size);
370 scratch_reset(usbvision);
371 if (usbvision->scratch == NULL) {
372 dev_err(&usbvision->dev->dev,
373 "%s: unable to allocate %d bytes for scratch\n",
374 __func__, scratch_buf_size);
375 return -ENOMEM;
376 }
377 return 0;
378 }
379
380 void usbvision_scratch_free(struct usb_usbvision *usbvision)
381 {
382 vfree(usbvision->scratch);
383 usbvision->scratch = NULL;
384 }
385
386 /*
387 * usbvision_decompress_alloc()
388 *
389 * allocates intermediate buffer for decompression
390 */
391 int usbvision_decompress_alloc(struct usb_usbvision *usbvision)
392 {
393 int IFB_size = MAX_FRAME_WIDTH * MAX_FRAME_HEIGHT * 3 / 2;
394
395 usbvision->intra_frame_buffer = vmalloc_32(IFB_size);
396 if (usbvision->intra_frame_buffer == NULL) {
397 dev_err(&usbvision->dev->dev,
398 "%s: unable to allocate %d for compr. frame buffer\n",
399 __func__, IFB_size);
400 return -ENOMEM;
401 }
402 return 0;
403 }
404
405 /*
406 * usbvision_decompress_free()
407 *
408 * frees intermediate buffer for decompression
409 */
410 void usbvision_decompress_free(struct usb_usbvision *usbvision)
411 {
412 vfree(usbvision->intra_frame_buffer);
413 usbvision->intra_frame_buffer = NULL;
414
415 }
416
417 /************************************************************
418 * Here comes the data parsing stuff that is run as interrupt
419 ************************************************************/
420 /*
421 * usbvision_find_header()
422 *
423 * Locate one of supported header markers in the scratch buffer.
424 */
425 static enum parse_state usbvision_find_header(struct usb_usbvision *usbvision)
426 {
427 struct usbvision_frame *frame;
428 int found_header = 0;
429
430 frame = usbvision->cur_frame;
431
432 while (scratch_get_header(usbvision, &frame->isoc_header) == USBVISION_HEADER_LENGTH) {
433 /* found header in scratch */
434 PDEBUG(DBG_HEADER, "found header: 0x%02x%02x %d %d %d %d %#x 0x%02x %u %u",
435 frame->isoc_header.magic_2,
436 frame->isoc_header.magic_1,
437 frame->isoc_header.header_length,
438 frame->isoc_header.frame_num,
439 frame->isoc_header.frame_phase,
440 frame->isoc_header.frame_latency,
441 frame->isoc_header.data_format,
442 frame->isoc_header.format_param,
443 frame->isoc_header.frame_width,
444 frame->isoc_header.frame_height);
445
446 if (usbvision->request_intra) {
447 if (frame->isoc_header.format_param & 0x80) {
448 found_header = 1;
449 usbvision->last_isoc_frame_num = -1; /* do not check for lost frames this time */
450 usbvision_unrequest_intra(usbvision);
451 break;
452 }
453 } else {
454 found_header = 1;
455 break;
456 }
457 }
458
459 if (found_header) {
460 frame->frmwidth = frame->isoc_header.frame_width * usbvision->stretch_width;
461 frame->frmheight = frame->isoc_header.frame_height * usbvision->stretch_height;
462 frame->v4l2_linesize = (frame->frmwidth * frame->v4l2_format.depth) >> 3;
463 } else { /* no header found */
464 PDEBUG(DBG_HEADER, "skipping scratch data, no header");
465 scratch_reset(usbvision);
466 return parse_state_end_parse;
467 }
468
469 /* found header */
470 if (frame->isoc_header.data_format == ISOC_MODE_COMPRESS) {
471 /* check isoc_header.frame_num for lost frames */
472 if (usbvision->last_isoc_frame_num >= 0) {
473 if (((usbvision->last_isoc_frame_num + 1) % 32) != frame->isoc_header.frame_num) {
474 /* unexpected frame drop: need to request new intra frame */
475 PDEBUG(DBG_HEADER, "Lost frame before %d on USB", frame->isoc_header.frame_num);
476 usbvision_request_intra(usbvision);
477 return parse_state_next_frame;
478 }
479 }
480 usbvision->last_isoc_frame_num = frame->isoc_header.frame_num;
481 }
482 usbvision->header_count++;
483 frame->scanstate = scan_state_lines;
484 frame->curline = 0;
485
486 return parse_state_continue;
487 }
488
489 static enum parse_state usbvision_parse_lines_422(struct usb_usbvision *usbvision,
490 long *pcopylen)
491 {
492 volatile struct usbvision_frame *frame;
493 unsigned char *f;
494 int len;
495 int i;
496 unsigned char yuyv[4] = { 180, 128, 10, 128 }; /* YUV components */
497 unsigned char rv, gv, bv; /* RGB components */
498 int clipmask_index, bytes_per_pixel;
499 int stretch_bytes, clipmask_add;
500
501 frame = usbvision->cur_frame;
502 f = frame->data + (frame->v4l2_linesize * frame->curline);
503
504 /* Make sure there's enough data for the entire line */
505 len = (frame->isoc_header.frame_width * 2) + 5;
506 if (scratch_len(usbvision) < len) {
507 PDEBUG(DBG_PARSE, "out of data in line %d, need %u.\n", frame->curline, len);
508 return parse_state_out;
509 }
510
511 if ((frame->curline + 1) >= frame->frmheight)
512 return parse_state_next_frame;
513
514 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
515 stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
516 clipmask_index = frame->curline * MAX_FRAME_WIDTH;
517 clipmask_add = usbvision->stretch_width;
518
519 for (i = 0; i < frame->frmwidth; i += (2 * usbvision->stretch_width)) {
520 scratch_get(usbvision, &yuyv[0], 4);
521
522 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
523 *f++ = yuyv[0]; /* Y */
524 *f++ = yuyv[3]; /* U */
525 } else {
526 YUV_TO_RGB_BY_THE_BOOK(yuyv[0], yuyv[1], yuyv[3], rv, gv, bv);
527 switch (frame->v4l2_format.format) {
528 case V4L2_PIX_FMT_RGB565:
529 *f++ = (0x1F & rv) |
530 (0xE0 & (gv << 5));
531 *f++ = (0x07 & (gv >> 3)) |
532 (0xF8 & bv);
533 break;
534 case V4L2_PIX_FMT_RGB24:
535 *f++ = rv;
536 *f++ = gv;
537 *f++ = bv;
538 break;
539 case V4L2_PIX_FMT_RGB32:
540 *f++ = rv;
541 *f++ = gv;
542 *f++ = bv;
543 f++;
544 break;
545 case V4L2_PIX_FMT_RGB555:
546 *f++ = (0x1F & rv) |
547 (0xE0 & (gv << 5));
548 *f++ = (0x03 & (gv >> 3)) |
549 (0x7C & (bv << 2));
550 break;
551 }
552 }
553 clipmask_index += clipmask_add;
554 f += stretch_bytes;
555
556 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
557 *f++ = yuyv[2]; /* Y */
558 *f++ = yuyv[1]; /* V */
559 } else {
560 YUV_TO_RGB_BY_THE_BOOK(yuyv[2], yuyv[1], yuyv[3], rv, gv, bv);
561 switch (frame->v4l2_format.format) {
562 case V4L2_PIX_FMT_RGB565:
563 *f++ = (0x1F & rv) |
564 (0xE0 & (gv << 5));
565 *f++ = (0x07 & (gv >> 3)) |
566 (0xF8 & bv);
567 break;
568 case V4L2_PIX_FMT_RGB24:
569 *f++ = rv;
570 *f++ = gv;
571 *f++ = bv;
572 break;
573 case V4L2_PIX_FMT_RGB32:
574 *f++ = rv;
575 *f++ = gv;
576 *f++ = bv;
577 f++;
578 break;
579 case V4L2_PIX_FMT_RGB555:
580 *f++ = (0x1F & rv) |
581 (0xE0 & (gv << 5));
582 *f++ = (0x03 & (gv >> 3)) |
583 (0x7C & (bv << 2));
584 break;
585 }
586 }
587 clipmask_index += clipmask_add;
588 f += stretch_bytes;
589 }
590
591 frame->curline += usbvision->stretch_height;
592 *pcopylen += frame->v4l2_linesize * usbvision->stretch_height;
593
594 if (frame->curline >= frame->frmheight)
595 return parse_state_next_frame;
596 return parse_state_continue;
597 }
598
599 /* The decompression routine */
600 static int usbvision_decompress(struct usb_usbvision *usbvision, unsigned char *compressed,
601 unsigned char *decompressed, int *start_pos,
602 int *block_typestart_pos, int len)
603 {
604 int rest_pixel, idx, max_pos, pos, extra_pos, block_len, block_type_pos, block_type_len;
605 unsigned char block_byte, block_code, block_type, block_type_byte, integrator;
606
607 integrator = 0;
608 pos = *start_pos;
609 block_type_pos = *block_typestart_pos;
610 max_pos = 396; /* pos + len; */
611 extra_pos = pos;
612 block_len = 0;
613 block_byte = 0;
614 block_code = 0;
615 block_type = 0;
616 block_type_byte = 0;
617 block_type_len = 0;
618 rest_pixel = len;
619
620 for (idx = 0; idx < len; idx++) {
621 if (block_len == 0) {
622 if (block_type_len == 0) {
623 block_type_byte = compressed[block_type_pos];
624 block_type_pos++;
625 block_type_len = 4;
626 }
627 block_type = (block_type_byte & 0xC0) >> 6;
628
629 /* statistic: */
630 usbvision->compr_block_types[block_type]++;
631
632 pos = extra_pos;
633 if (block_type == 0) {
634 if (rest_pixel >= 24) {
635 idx += 23;
636 rest_pixel -= 24;
637 integrator = decompressed[idx];
638 } else {
639 idx += rest_pixel - 1;
640 rest_pixel = 0;
641 }
642 } else {
643 block_code = compressed[pos];
644 pos++;
645 if (rest_pixel >= 24)
646 block_len = 24;
647 else
648 block_len = rest_pixel;
649 rest_pixel -= block_len;
650 extra_pos = pos + (block_len / 4);
651 }
652 block_type_byte <<= 2;
653 block_type_len -= 1;
654 }
655 if (block_len > 0) {
656 if ((block_len % 4) == 0) {
657 block_byte = compressed[pos];
658 pos++;
659 }
660 if (block_type == 1) /* inter Block */
661 integrator = decompressed[idx];
662 switch (block_byte & 0xC0) {
663 case 0x03 << 6:
664 integrator += compressed[extra_pos];
665 extra_pos++;
666 break;
667 case 0x02 << 6:
668 integrator += block_code;
669 break;
670 case 0x00:
671 integrator -= block_code;
672 break;
673 }
674 decompressed[idx] = integrator;
675 block_byte <<= 2;
676 block_len -= 1;
677 }
678 }
679 *start_pos = extra_pos;
680 *block_typestart_pos = block_type_pos;
681 return idx;
682 }
683
684
685 /*
686 * usbvision_parse_compress()
687 *
688 * Parse compressed frame from the scratch buffer, put
689 * decoded RGB value into the current frame buffer and add the written
690 * number of bytes (RGB) to the *pcopylen.
691 *
692 */
693 static enum parse_state usbvision_parse_compress(struct usb_usbvision *usbvision,
694 long *pcopylen)
695 {
696 #define USBVISION_STRIP_MAGIC 0x5A
697 #define USBVISION_STRIP_LEN_MAX 400
698 #define USBVISION_STRIP_HEADER_LEN 3
699
700 struct usbvision_frame *frame;
701 unsigned char *f, *u = NULL, *v = NULL;
702 unsigned char strip_data[USBVISION_STRIP_LEN_MAX];
703 unsigned char strip_header[USBVISION_STRIP_HEADER_LEN];
704 int idx, idx_end, strip_len, strip_ptr, startblock_pos, block_pos, block_type_pos;
705 int clipmask_index, bytes_per_pixel, rc;
706 int image_size;
707 unsigned char rv, gv, bv;
708 static unsigned char *Y, *U, *V;
709
710 frame = usbvision->cur_frame;
711 image_size = frame->frmwidth * frame->frmheight;
712 if ((frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) ||
713 (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420)) { /* this is a planar format */
714 /* ... v4l2_linesize not used here. */
715 f = frame->data + (frame->width * frame->curline);
716 } else
717 f = frame->data + (frame->v4l2_linesize * frame->curline);
718
719 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { /* initialise u and v pointers */
720 /* get base of u and b planes add halfoffset */
721 u = frame->data
722 + image_size
723 + (frame->frmwidth >> 1) * frame->curline;
724 v = u + (image_size >> 1);
725 } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) {
726 v = frame->data + image_size + ((frame->curline * (frame->width)) >> 2);
727 u = v + (image_size >> 2);
728 }
729
730 if (frame->curline == 0)
731 usbvision_adjust_compression(usbvision);
732
733 if (scratch_len(usbvision) < USBVISION_STRIP_HEADER_LEN)
734 return parse_state_out;
735
736 /* get strip header without changing the scratch_read_ptr */
737 scratch_set_extra_ptr(usbvision, &strip_ptr, 0);
738 scratch_get_extra(usbvision, &strip_header[0], &strip_ptr,
739 USBVISION_STRIP_HEADER_LEN);
740
741 if (strip_header[0] != USBVISION_STRIP_MAGIC) {
742 /* wrong strip magic */
743 usbvision->strip_magic_errors++;
744 return parse_state_next_frame;
745 }
746
747 if (frame->curline != (int)strip_header[2]) {
748 /* line number mismatch error */
749 usbvision->strip_line_number_errors++;
750 }
751
752 strip_len = 2 * (unsigned int)strip_header[1];
753 if (strip_len > USBVISION_STRIP_LEN_MAX) {
754 /* strip overrun */
755 /* I think this never happens */
756 usbvision_request_intra(usbvision);
757 }
758
759 if (scratch_len(usbvision) < strip_len) {
760 /* there is not enough data for the strip */
761 return parse_state_out;
762 }
763
764 if (usbvision->intra_frame_buffer) {
765 Y = usbvision->intra_frame_buffer + frame->frmwidth * frame->curline;
766 U = usbvision->intra_frame_buffer + image_size + (frame->frmwidth / 2) * (frame->curline / 2);
767 V = usbvision->intra_frame_buffer + image_size / 4 * 5 + (frame->frmwidth / 2) * (frame->curline / 2);
768 } else {
769 return parse_state_next_frame;
770 }
771
772 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
773 clipmask_index = frame->curline * MAX_FRAME_WIDTH;
774
775 scratch_get(usbvision, strip_data, strip_len);
776
777 idx_end = frame->frmwidth;
778 block_type_pos = USBVISION_STRIP_HEADER_LEN;
779 startblock_pos = block_type_pos + (idx_end - 1) / 96 + (idx_end / 2 - 1) / 96 + 2;
780 block_pos = startblock_pos;
781
782 usbvision->block_pos = block_pos;
783
784 rc = usbvision_decompress(usbvision, strip_data, Y, &block_pos, &block_type_pos, idx_end);
785 if (strip_len > usbvision->max_strip_len)
786 usbvision->max_strip_len = strip_len;
787
788 if (frame->curline % 2)
789 rc = usbvision_decompress(usbvision, strip_data, V, &block_pos, &block_type_pos, idx_end / 2);
790 else
791 rc = usbvision_decompress(usbvision, strip_data, U, &block_pos, &block_type_pos, idx_end / 2);
792
793 if (block_pos > usbvision->comprblock_pos)
794 usbvision->comprblock_pos = block_pos;
795 if (block_pos > strip_len)
796 usbvision->strip_len_errors++;
797
798 for (idx = 0; idx < idx_end; idx++) {
799 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
800 *f++ = Y[idx];
801 *f++ = idx & 0x01 ? U[idx / 2] : V[idx / 2];
802 } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) {
803 *f++ = Y[idx];
804 if (idx & 0x01)
805 *u++ = U[idx >> 1];
806 else
807 *v++ = V[idx >> 1];
808 } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) {
809 *f++ = Y[idx];
810 if (!((idx & 0x01) | (frame->curline & 0x01))) {
811 /* only need do this for 1 in 4 pixels */
812 /* intraframe buffer is YUV420 format */
813 *u++ = U[idx >> 1];
814 *v++ = V[idx >> 1];
815 }
816 } else {
817 YUV_TO_RGB_BY_THE_BOOK(Y[idx], U[idx / 2], V[idx / 2], rv, gv, bv);
818 switch (frame->v4l2_format.format) {
819 case V4L2_PIX_FMT_GREY:
820 *f++ = Y[idx];
821 break;
822 case V4L2_PIX_FMT_RGB555:
823 *f++ = (0x1F & rv) |
824 (0xE0 & (gv << 5));
825 *f++ = (0x03 & (gv >> 3)) |
826 (0x7C & (bv << 2));
827 break;
828 case V4L2_PIX_FMT_RGB565:
829 *f++ = (0x1F & rv) |
830 (0xE0 & (gv << 5));
831 *f++ = (0x07 & (gv >> 3)) |
832 (0xF8 & bv);
833 break;
834 case V4L2_PIX_FMT_RGB24:
835 *f++ = rv;
836 *f++ = gv;
837 *f++ = bv;
838 break;
839 case V4L2_PIX_FMT_RGB32:
840 *f++ = rv;
841 *f++ = gv;
842 *f++ = bv;
843 f++;
844 break;
845 }
846 }
847 clipmask_index++;
848 }
849 /* Deal with non-integer no. of bytes for YUV420P */
850 if (frame->v4l2_format.format != V4L2_PIX_FMT_YVU420)
851 *pcopylen += frame->v4l2_linesize;
852 else
853 *pcopylen += frame->curline & 0x01 ? frame->v4l2_linesize : frame->v4l2_linesize << 1;
854
855 frame->curline += 1;
856
857 if (frame->curline >= frame->frmheight)
858 return parse_state_next_frame;
859 return parse_state_continue;
860
861 }
862
863
864 /*
865 * usbvision_parse_lines_420()
866 *
867 * Parse two lines from the scratch buffer, put
868 * decoded RGB value into the current frame buffer and add the written
869 * number of bytes (RGB) to the *pcopylen.
870 *
871 */
872 static enum parse_state usbvision_parse_lines_420(struct usb_usbvision *usbvision,
873 long *pcopylen)
874 {
875 struct usbvision_frame *frame;
876 unsigned char *f_even = NULL, *f_odd = NULL;
877 unsigned int pixel_per_line, block;
878 int pixel, block_split;
879 int y_ptr, u_ptr, v_ptr, y_odd_offset;
880 const int y_block_size = 128;
881 const int uv_block_size = 64;
882 const int sub_block_size = 32;
883 const int y_step[] = { 0, 0, 0, 2 }, y_step_size = 4;
884 const int uv_step[] = { 0, 0, 0, 4 }, uv_step_size = 4;
885 unsigned char y[2], u, v; /* YUV components */
886 int y_, u_, v_, vb, uvg, ur;
887 int r_, g_, b_; /* RGB components */
888 unsigned char g;
889 int clipmask_even_index, clipmask_odd_index, bytes_per_pixel;
890 int clipmask_add, stretch_bytes;
891
892 frame = usbvision->cur_frame;
893 f_even = frame->data + (frame->v4l2_linesize * frame->curline);
894 f_odd = f_even + frame->v4l2_linesize * usbvision->stretch_height;
895
896 /* Make sure there's enough data for the entire line */
897 /* In this mode usbvision transfer 3 bytes for every 2 pixels */
898 /* I need two lines to decode the color */
899 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
900 stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
901 clipmask_even_index = frame->curline * MAX_FRAME_WIDTH;
902 clipmask_odd_index = clipmask_even_index + MAX_FRAME_WIDTH;
903 clipmask_add = usbvision->stretch_width;
904 pixel_per_line = frame->isoc_header.frame_width;
905
906 if (scratch_len(usbvision) < (int)pixel_per_line * 3) {
907 /* printk(KERN_DEBUG "out of data, need %d\n", len); */
908 return parse_state_out;
909 }
910
911 if ((frame->curline + 1) >= frame->frmheight)
912 return parse_state_next_frame;
913
914 block_split = (pixel_per_line%y_block_size) ? 1 : 0; /* are some blocks splitted into different lines? */
915
916 y_odd_offset = (pixel_per_line / y_block_size) * (y_block_size + uv_block_size)
917 + block_split * uv_block_size;
918
919 scratch_set_extra_ptr(usbvision, &y_ptr, y_odd_offset);
920 scratch_set_extra_ptr(usbvision, &u_ptr, y_block_size);
921 scratch_set_extra_ptr(usbvision, &v_ptr, y_odd_offset
922 + (4 - block_split) * sub_block_size);
923
924 for (block = 0; block < (pixel_per_line / sub_block_size); block++) {
925 for (pixel = 0; pixel < sub_block_size; pixel += 2) {
926 scratch_get(usbvision, &y[0], 2);
927 scratch_get_extra(usbvision, &u, &u_ptr, 1);
928 scratch_get_extra(usbvision, &v, &v_ptr, 1);
929
930 /* I don't use the YUV_TO_RGB macro for better performance */
931 v_ = v - 128;
932 u_ = u - 128;
933 vb = 132252 * v_;
934 uvg = -53281 * u_ - 25625 * v_;
935 ur = 104595 * u_;
936
937 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
938 *f_even++ = y[0];
939 *f_even++ = v;
940 } else {
941 y_ = 76284 * (y[0] - 16);
942
943 b_ = (y_ + vb) >> 16;
944 g_ = (y_ + uvg) >> 16;
945 r_ = (y_ + ur) >> 16;
946
947 switch (frame->v4l2_format.format) {
948 case V4L2_PIX_FMT_RGB565:
949 g = LIMIT_RGB(g_);
950 *f_even++ =
951 (0x1F & LIMIT_RGB(r_)) |
952 (0xE0 & (g << 5));
953 *f_even++ =
954 (0x07 & (g >> 3)) |
955 (0xF8 & LIMIT_RGB(b_));
956 break;
957 case V4L2_PIX_FMT_RGB24:
958 *f_even++ = LIMIT_RGB(r_);
959 *f_even++ = LIMIT_RGB(g_);
960 *f_even++ = LIMIT_RGB(b_);
961 break;
962 case V4L2_PIX_FMT_RGB32:
963 *f_even++ = LIMIT_RGB(r_);
964 *f_even++ = LIMIT_RGB(g_);
965 *f_even++ = LIMIT_RGB(b_);
966 f_even++;
967 break;
968 case V4L2_PIX_FMT_RGB555:
969 g = LIMIT_RGB(g_);
970 *f_even++ = (0x1F & LIMIT_RGB(r_)) |
971 (0xE0 & (g << 5));
972 *f_even++ = (0x03 & (g >> 3)) |
973 (0x7C & (LIMIT_RGB(b_) << 2));
974 break;
975 }
976 }
977 clipmask_even_index += clipmask_add;
978 f_even += stretch_bytes;
979
980 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
981 *f_even++ = y[1];
982 *f_even++ = u;
983 } else {
984 y_ = 76284 * (y[1] - 16);
985
986 b_ = (y_ + vb) >> 16;
987 g_ = (y_ + uvg) >> 16;
988 r_ = (y_ + ur) >> 16;
989
990 switch (frame->v4l2_format.format) {
991 case V4L2_PIX_FMT_RGB565:
992 g = LIMIT_RGB(g_);
993 *f_even++ =
994 (0x1F & LIMIT_RGB(r_)) |
995 (0xE0 & (g << 5));
996 *f_even++ =
997 (0x07 & (g >> 3)) |
998 (0xF8 & LIMIT_RGB(b_));
999 break;
1000 case V4L2_PIX_FMT_RGB24:
1001 *f_even++ = LIMIT_RGB(r_);
1002 *f_even++ = LIMIT_RGB(g_);
1003 *f_even++ = LIMIT_RGB(b_);
1004 break;
1005 case V4L2_PIX_FMT_RGB32:
1006 *f_even++ = LIMIT_RGB(r_);
1007 *f_even++ = LIMIT_RGB(g_);
1008 *f_even++ = LIMIT_RGB(b_);
1009 f_even++;
1010 break;
1011 case V4L2_PIX_FMT_RGB555:
1012 g = LIMIT_RGB(g_);
1013 *f_even++ = (0x1F & LIMIT_RGB(r_)) |
1014 (0xE0 & (g << 5));
1015 *f_even++ = (0x03 & (g >> 3)) |
1016 (0x7C & (LIMIT_RGB(b_) << 2));
1017 break;
1018 }
1019 }
1020 clipmask_even_index += clipmask_add;
1021 f_even += stretch_bytes;
1022
1023 scratch_get_extra(usbvision, &y[0], &y_ptr, 2);
1024
1025 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1026 *f_odd++ = y[0];
1027 *f_odd++ = v;
1028 } else {
1029 y_ = 76284 * (y[0] - 16);
1030
1031 b_ = (y_ + vb) >> 16;
1032 g_ = (y_ + uvg) >> 16;
1033 r_ = (y_ + ur) >> 16;
1034
1035 switch (frame->v4l2_format.format) {
1036 case V4L2_PIX_FMT_RGB565:
1037 g = LIMIT_RGB(g_);
1038 *f_odd++ =
1039 (0x1F & LIMIT_RGB(r_)) |
1040 (0xE0 & (g << 5));
1041 *f_odd++ =
1042 (0x07 & (g >> 3)) |
1043 (0xF8 & LIMIT_RGB(b_));
1044 break;
1045 case V4L2_PIX_FMT_RGB24:
1046 *f_odd++ = LIMIT_RGB(r_);
1047 *f_odd++ = LIMIT_RGB(g_);
1048 *f_odd++ = LIMIT_RGB(b_);
1049 break;
1050 case V4L2_PIX_FMT_RGB32:
1051 *f_odd++ = LIMIT_RGB(r_);
1052 *f_odd++ = LIMIT_RGB(g_);
1053 *f_odd++ = LIMIT_RGB(b_);
1054 f_odd++;
1055 break;
1056 case V4L2_PIX_FMT_RGB555:
1057 g = LIMIT_RGB(g_);
1058 *f_odd++ = (0x1F & LIMIT_RGB(r_)) |
1059 (0xE0 & (g << 5));
1060 *f_odd++ = (0x03 & (g >> 3)) |
1061 (0x7C & (LIMIT_RGB(b_) << 2));
1062 break;
1063 }
1064 }
1065 clipmask_odd_index += clipmask_add;
1066 f_odd += stretch_bytes;
1067
1068 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1069 *f_odd++ = y[1];
1070 *f_odd++ = u;
1071 } else {
1072 y_ = 76284 * (y[1] - 16);
1073
1074 b_ = (y_ + vb) >> 16;
1075 g_ = (y_ + uvg) >> 16;
1076 r_ = (y_ + ur) >> 16;
1077
1078 switch (frame->v4l2_format.format) {
1079 case V4L2_PIX_FMT_RGB565:
1080 g = LIMIT_RGB(g_);
1081 *f_odd++ =
1082 (0x1F & LIMIT_RGB(r_)) |
1083 (0xE0 & (g << 5));
1084 *f_odd++ =
1085 (0x07 & (g >> 3)) |
1086 (0xF8 & LIMIT_RGB(b_));
1087 break;
1088 case V4L2_PIX_FMT_RGB24:
1089 *f_odd++ = LIMIT_RGB(r_);
1090 *f_odd++ = LIMIT_RGB(g_);
1091 *f_odd++ = LIMIT_RGB(b_);
1092 break;
1093 case V4L2_PIX_FMT_RGB32:
1094 *f_odd++ = LIMIT_RGB(r_);
1095 *f_odd++ = LIMIT_RGB(g_);
1096 *f_odd++ = LIMIT_RGB(b_);
1097 f_odd++;
1098 break;
1099 case V4L2_PIX_FMT_RGB555:
1100 g = LIMIT_RGB(g_);
1101 *f_odd++ = (0x1F & LIMIT_RGB(r_)) |
1102 (0xE0 & (g << 5));
1103 *f_odd++ = (0x03 & (g >> 3)) |
1104 (0x7C & (LIMIT_RGB(b_) << 2));
1105 break;
1106 }
1107 }
1108 clipmask_odd_index += clipmask_add;
1109 f_odd += stretch_bytes;
1110 }
1111
1112 scratch_rm_old(usbvision, y_step[block % y_step_size] * sub_block_size);
1113 scratch_inc_extra_ptr(&y_ptr, y_step[(block + 2 * block_split) % y_step_size]
1114 * sub_block_size);
1115 scratch_inc_extra_ptr(&u_ptr, uv_step[block % uv_step_size]
1116 * sub_block_size);
1117 scratch_inc_extra_ptr(&v_ptr, uv_step[(block + 2 * block_split) % uv_step_size]
1118 * sub_block_size);
1119 }
1120
1121 scratch_rm_old(usbvision, pixel_per_line * 3 / 2
1122 + block_split * sub_block_size);
1123
1124 frame->curline += 2 * usbvision->stretch_height;
1125 *pcopylen += frame->v4l2_linesize * 2 * usbvision->stretch_height;
1126
1127 if (frame->curline >= frame->frmheight)
1128 return parse_state_next_frame;
1129 return parse_state_continue;
1130 }
1131
1132 /*
1133 * usbvision_parse_data()
1134 *
1135 * Generic routine to parse the scratch buffer. It employs either
1136 * usbvision_find_header() or usbvision_parse_lines() to do most
1137 * of work.
1138 *
1139 */
1140 static void usbvision_parse_data(struct usb_usbvision *usbvision)
1141 {
1142 struct usbvision_frame *frame;
1143 enum parse_state newstate;
1144 long copylen = 0;
1145 unsigned long lock_flags;
1146
1147 frame = usbvision->cur_frame;
1148
1149 PDEBUG(DBG_PARSE, "parsing len=%d\n", scratch_len(usbvision));
1150
1151 while (1) {
1152 newstate = parse_state_out;
1153 if (scratch_len(usbvision)) {
1154 if (frame->scanstate == scan_state_scanning) {
1155 newstate = usbvision_find_header(usbvision);
1156 } else if (frame->scanstate == scan_state_lines) {
1157 if (usbvision->isoc_mode == ISOC_MODE_YUV420)
1158 newstate = usbvision_parse_lines_420(usbvision, &copylen);
1159 else if (usbvision->isoc_mode == ISOC_MODE_YUV422)
1160 newstate = usbvision_parse_lines_422(usbvision, &copylen);
1161 else if (usbvision->isoc_mode == ISOC_MODE_COMPRESS)
1162 newstate = usbvision_parse_compress(usbvision, &copylen);
1163 }
1164 }
1165 if (newstate == parse_state_continue)
1166 continue;
1167 if ((newstate == parse_state_next_frame) || (newstate == parse_state_out))
1168 break;
1169 return; /* parse_state_end_parse */
1170 }
1171
1172 if (newstate == parse_state_next_frame) {
1173 frame->grabstate = frame_state_done;
1174 do_gettimeofday(&(frame->timestamp));
1175 frame->sequence = usbvision->frame_num;
1176
1177 spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
1178 list_move_tail(&(frame->frame), &usbvision->outqueue);
1179 usbvision->cur_frame = NULL;
1180 spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
1181
1182 usbvision->frame_num++;
1183
1184 /* This will cause the process to request another frame. */
1185 if (waitqueue_active(&usbvision->wait_frame)) {
1186 PDEBUG(DBG_PARSE, "Wake up !");
1187 wake_up_interruptible(&usbvision->wait_frame);
1188 }
1189 } else {
1190 frame->grabstate = frame_state_grabbing;
1191 }
1192
1193 /* Update the frame's uncompressed length. */
1194 frame->scanlength += copylen;
1195 }
1196
1197
1198 /*
1199 * Make all of the blocks of data contiguous
1200 */
1201 static int usbvision_compress_isochronous(struct usb_usbvision *usbvision,
1202 struct urb *urb)
1203 {
1204 unsigned char *packet_data;
1205 int i, totlen = 0;
1206
1207 for (i = 0; i < urb->number_of_packets; i++) {
1208 int packet_len = urb->iso_frame_desc[i].actual_length;
1209 int packet_stat = urb->iso_frame_desc[i].status;
1210
1211 packet_data = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
1212
1213 /* Detect and ignore errored packets */
1214 if (packet_stat) { /* packet_stat != 0 ????????????? */
1215 PDEBUG(DBG_ISOC, "data error: [%d] len=%d, status=%X", i, packet_len, packet_stat);
1216 usbvision->isoc_err_count++;
1217 continue;
1218 }
1219
1220 /* Detect and ignore empty packets */
1221 if (packet_len < 0) {
1222 PDEBUG(DBG_ISOC, "error packet [%d]", i);
1223 usbvision->isoc_skip_count++;
1224 continue;
1225 } else if (packet_len == 0) { /* Frame end ????? */
1226 PDEBUG(DBG_ISOC, "null packet [%d]", i);
1227 usbvision->isocstate = isoc_state_no_frame;
1228 usbvision->isoc_skip_count++;
1229 continue;
1230 } else if (packet_len > usbvision->isoc_packet_size) {
1231 PDEBUG(DBG_ISOC, "packet[%d] > isoc_packet_size", i);
1232 usbvision->isoc_skip_count++;
1233 continue;
1234 }
1235
1236 PDEBUG(DBG_ISOC, "packet ok [%d] len=%d", i, packet_len);
1237
1238 if (usbvision->isocstate == isoc_state_no_frame) { /* new frame begins */
1239 usbvision->isocstate = isoc_state_in_frame;
1240 scratch_mark_header(usbvision);
1241 usbvision_measure_bandwidth(usbvision);
1242 PDEBUG(DBG_ISOC, "packet with header");
1243 }
1244
1245 /*
1246 * If usbvision continues to feed us with data but there is no
1247 * consumption (if, for example, V4L client fell asleep) we
1248 * may overflow the buffer. We have to move old data over to
1249 * free room for new data. This is bad for old data. If we
1250 * just drop new data then it's bad for new data... choose
1251 * your favorite evil here.
1252 */
1253 if (scratch_free(usbvision) < packet_len) {
1254 usbvision->scratch_ovf_count++;
1255 PDEBUG(DBG_ISOC, "scratch buf overflow! scr_len: %d, n: %d",
1256 scratch_len(usbvision), packet_len);
1257 scratch_rm_old(usbvision, packet_len - scratch_free(usbvision));
1258 }
1259
1260 /* Now we know that there is enough room in scratch buffer */
1261 scratch_put(usbvision, packet_data, packet_len);
1262 totlen += packet_len;
1263 usbvision->isoc_data_count += packet_len;
1264 usbvision->isoc_packet_count++;
1265 }
1266 #if ENABLE_HEXDUMP
1267 if (totlen > 0) {
1268 static int foo;
1269
1270 if (foo < 1) {
1271 printk(KERN_DEBUG "+%d.\n", usbvision->scratchlen);
1272 usbvision_hexdump(data0, (totlen > 64) ? 64 : totlen);
1273 ++foo;
1274 }
1275 }
1276 #endif
1277 return totlen;
1278 }
1279
1280 static void usbvision_isoc_irq(struct urb *urb)
1281 {
1282 int err_code = 0;
1283 int len;
1284 struct usb_usbvision *usbvision = urb->context;
1285 int i;
1286 unsigned long start_time = jiffies;
1287 struct usbvision_frame **f;
1288
1289 /* We don't want to do anything if we are about to be removed! */
1290 if (!USBVISION_IS_OPERATIONAL(usbvision))
1291 return;
1292
1293 /* any urb with wrong status is ignored without acknowledgement */
1294 if (urb->status == -ENOENT)
1295 return;
1296
1297 f = &usbvision->cur_frame;
1298
1299 /* Manage streaming interruption */
1300 if (usbvision->streaming == stream_interrupt) {
1301 usbvision->streaming = stream_idle;
1302 if ((*f)) {
1303 (*f)->grabstate = frame_state_ready;
1304 (*f)->scanstate = scan_state_scanning;
1305 }
1306 PDEBUG(DBG_IRQ, "stream interrupted");
1307 wake_up_interruptible(&usbvision->wait_stream);
1308 }
1309
1310 /* Copy the data received into our scratch buffer */
1311 len = usbvision_compress_isochronous(usbvision, urb);
1312
1313 usbvision->isoc_urb_count++;
1314 usbvision->urb_length = len;
1315
1316 if (usbvision->streaming == stream_on) {
1317 /* If we collected enough data let's parse! */
1318 if (scratch_len(usbvision) > USBVISION_HEADER_LENGTH &&
1319 !list_empty(&(usbvision->inqueue))) {
1320 if (!(*f)) {
1321 (*f) = list_entry(usbvision->inqueue.next,
1322 struct usbvision_frame,
1323 frame);
1324 }
1325 usbvision_parse_data(usbvision);
1326 } else {
1327 /* If we don't have a frame
1328 we're current working on, complain */
1329 PDEBUG(DBG_IRQ,
1330 "received data, but no one needs it");
1331 scratch_reset(usbvision);
1332 }
1333 } else {
1334 PDEBUG(DBG_IRQ, "received data, but no one needs it");
1335 scratch_reset(usbvision);
1336 }
1337
1338 usbvision->time_in_irq += jiffies - start_time;
1339
1340 for (i = 0; i < USBVISION_URB_FRAMES; i++) {
1341 urb->iso_frame_desc[i].status = 0;
1342 urb->iso_frame_desc[i].actual_length = 0;
1343 }
1344
1345 urb->status = 0;
1346 urb->dev = usbvision->dev;
1347 err_code = usb_submit_urb(urb, GFP_ATOMIC);
1348
1349 if (err_code) {
1350 dev_err(&usbvision->dev->dev,
1351 "%s: usb_submit_urb failed: error %d\n",
1352 __func__, err_code);
1353 }
1354
1355 return;
1356 }
1357
1358 /*************************************/
1359 /* Low level usbvision access functions */
1360 /*************************************/
1361
1362 /*
1363 * usbvision_read_reg()
1364 *
1365 * return < 0 -> Error
1366 * >= 0 -> Data
1367 */
1368
1369 int usbvision_read_reg(struct usb_usbvision *usbvision, unsigned char reg)
1370 {
1371 int err_code = 0;
1372 unsigned char buffer[1];
1373
1374 if (!USBVISION_IS_OPERATIONAL(usbvision))
1375 return -1;
1376
1377 err_code = usb_control_msg(usbvision->dev, usb_rcvctrlpipe(usbvision->dev, 1),
1378 USBVISION_OP_CODE,
1379 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1380 0, (__u16) reg, buffer, 1, HZ);
1381
1382 if (err_code < 0) {
1383 dev_err(&usbvision->dev->dev,
1384 "%s: failed: error %d\n", __func__, err_code);
1385 return err_code;
1386 }
1387 return buffer[0];
1388 }
1389
1390 /*
1391 * usbvision_write_reg()
1392 *
1393 * return 1 -> Reg written
1394 * 0 -> usbvision is not yet ready
1395 * -1 -> Something went wrong
1396 */
1397
1398 int usbvision_write_reg(struct usb_usbvision *usbvision, unsigned char reg,
1399 unsigned char value)
1400 {
1401 int err_code = 0;
1402
1403 if (!USBVISION_IS_OPERATIONAL(usbvision))
1404 return 0;
1405
1406 err_code = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1407 USBVISION_OP_CODE,
1408 USB_DIR_OUT | USB_TYPE_VENDOR |
1409 USB_RECIP_ENDPOINT, 0, (__u16) reg, &value, 1, HZ);
1410
1411 if (err_code < 0) {
1412 dev_err(&usbvision->dev->dev,
1413 "%s: failed: error %d\n", __func__, err_code);
1414 }
1415 return err_code;
1416 }
1417
1418
1419 static void usbvision_ctrl_urb_complete(struct urb *urb)
1420 {
1421 struct usb_usbvision *usbvision = (struct usb_usbvision *)urb->context;
1422
1423 PDEBUG(DBG_IRQ, "");
1424 usbvision->ctrl_urb_busy = 0;
1425 if (waitqueue_active(&usbvision->ctrl_urb_wq))
1426 wake_up_interruptible(&usbvision->ctrl_urb_wq);
1427 }
1428
1429
1430 static int usbvision_write_reg_irq(struct usb_usbvision *usbvision, int address,
1431 unsigned char *data, int len)
1432 {
1433 int err_code = 0;
1434
1435 PDEBUG(DBG_IRQ, "");
1436 if (len > 8)
1437 return -EFAULT;
1438 if (usbvision->ctrl_urb_busy)
1439 return -EBUSY;
1440 usbvision->ctrl_urb_busy = 1;
1441
1442 usbvision->ctrl_urb_setup.bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT;
1443 usbvision->ctrl_urb_setup.bRequest = USBVISION_OP_CODE;
1444 usbvision->ctrl_urb_setup.wValue = 0;
1445 usbvision->ctrl_urb_setup.wIndex = cpu_to_le16(address);
1446 usbvision->ctrl_urb_setup.wLength = cpu_to_le16(len);
1447 usb_fill_control_urb(usbvision->ctrl_urb, usbvision->dev,
1448 usb_sndctrlpipe(usbvision->dev, 1),
1449 (unsigned char *)&usbvision->ctrl_urb_setup,
1450 (void *)usbvision->ctrl_urb_buffer, len,
1451 usbvision_ctrl_urb_complete,
1452 (void *)usbvision);
1453
1454 memcpy(usbvision->ctrl_urb_buffer, data, len);
1455
1456 err_code = usb_submit_urb(usbvision->ctrl_urb, GFP_ATOMIC);
1457 if (err_code < 0) {
1458 /* error in usb_submit_urb() */
1459 usbvision->ctrl_urb_busy = 0;
1460 }
1461 PDEBUG(DBG_IRQ, "submit %d byte: error %d", len, err_code);
1462 return err_code;
1463 }
1464
1465
1466 static int usbvision_init_compression(struct usb_usbvision *usbvision)
1467 {
1468 int err_code = 0;
1469
1470 usbvision->last_isoc_frame_num = -1;
1471 usbvision->isoc_data_count = 0;
1472 usbvision->isoc_packet_count = 0;
1473 usbvision->isoc_skip_count = 0;
1474 usbvision->compr_level = 50;
1475 usbvision->last_compr_level = -1;
1476 usbvision->isoc_urb_count = 0;
1477 usbvision->request_intra = 1;
1478 usbvision->isoc_measure_bandwidth_count = 0;
1479
1480 return err_code;
1481 }
1482
1483 /* this function measures the used bandwidth since last call
1484 * return: 0 : no error
1485 * sets used_bandwidth to 1-100 : 1-100% of full bandwidth resp. to isoc_packet_size
1486 */
1487 static int usbvision_measure_bandwidth(struct usb_usbvision *usbvision)
1488 {
1489 int err_code = 0;
1490
1491 if (usbvision->isoc_measure_bandwidth_count < 2) { /* this gives an average bandwidth of 3 frames */
1492 usbvision->isoc_measure_bandwidth_count++;
1493 return err_code;
1494 }
1495 if ((usbvision->isoc_packet_size > 0) && (usbvision->isoc_packet_count > 0)) {
1496 usbvision->used_bandwidth = usbvision->isoc_data_count /
1497 (usbvision->isoc_packet_count + usbvision->isoc_skip_count) *
1498 100 / usbvision->isoc_packet_size;
1499 }
1500 usbvision->isoc_measure_bandwidth_count = 0;
1501 usbvision->isoc_data_count = 0;
1502 usbvision->isoc_packet_count = 0;
1503 usbvision->isoc_skip_count = 0;
1504 return err_code;
1505 }
1506
1507 static int usbvision_adjust_compression(struct usb_usbvision *usbvision)
1508 {
1509 int err_code = 0;
1510 unsigned char buffer[6];
1511
1512 PDEBUG(DBG_IRQ, "");
1513 if ((adjust_compression) && (usbvision->used_bandwidth > 0)) {
1514 usbvision->compr_level += (usbvision->used_bandwidth - 90) / 2;
1515 RESTRICT_TO_RANGE(usbvision->compr_level, 0, 100);
1516 if (usbvision->compr_level != usbvision->last_compr_level) {
1517 int distortion;
1518
1519 if (usbvision->bridge_type == BRIDGE_NT1004 || usbvision->bridge_type == BRIDGE_NT1005) {
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 = 7 + 248 * usbvision->compr_level / 100;
1523 buffer[2] = (unsigned char)(distortion & 0xFF); /* Average distortion Threshold (inter) */
1524 buffer[3] = (unsigned char)(distortion & 0xFF); /* Average distortion Threshold (intra) */
1525 distortion = 1 + 42 * usbvision->compr_level / 100;
1526 buffer[4] = (unsigned char)(distortion & 0xFF); /* Maximum distortion Threshold (inter) */
1527 buffer[5] = (unsigned char)(distortion & 0xFF); /* Maximum distortion Threshold (intra) */
1528 } else { /* BRIDGE_NT1003 */
1529 buffer[0] = (unsigned char)(4 + 16 * usbvision->compr_level / 100); /* PCM threshold 1 */
1530 buffer[1] = (unsigned char)(4 + 8 * usbvision->compr_level / 100); /* PCM threshold 2 */
1531 distortion = 2 + 253 * usbvision->compr_level / 100;
1532 buffer[2] = (unsigned char)(distortion & 0xFF); /* distortion threshold bit0-7 */
1533 buffer[3] = 0; /* (unsigned char)((distortion >> 8) & 0x0F); distortion threshold bit 8-11 */
1534 distortion = 0 + 43 * usbvision->compr_level / 100;
1535 buffer[4] = (unsigned char)(distortion & 0xFF); /* maximum distortion bit0-7 */
1536 buffer[5] = 0; /* (unsigned char)((distortion >> 8) & 0x01); maximum distortion bit 8 */
1537 }
1538 err_code = usbvision_write_reg_irq(usbvision, USBVISION_PCM_THR1, buffer, 6);
1539 if (err_code == 0) {
1540 PDEBUG(DBG_IRQ, "new compr params %#02x %#02x %#02x %#02x %#02x %#02x", buffer[0],
1541 buffer[1], buffer[2], buffer[3], buffer[4], buffer[5]);
1542 usbvision->last_compr_level = usbvision->compr_level;
1543 }
1544 }
1545 }
1546 return err_code;
1547 }
1548
1549 static int usbvision_request_intra(struct usb_usbvision *usbvision)
1550 {
1551 int err_code = 0;
1552 unsigned char buffer[1];
1553
1554 PDEBUG(DBG_IRQ, "");
1555 usbvision->request_intra = 1;
1556 buffer[0] = 1;
1557 usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1558 return err_code;
1559 }
1560
1561 static int usbvision_unrequest_intra(struct usb_usbvision *usbvision)
1562 {
1563 int err_code = 0;
1564 unsigned char buffer[1];
1565
1566 PDEBUG(DBG_IRQ, "");
1567 usbvision->request_intra = 0;
1568 buffer[0] = 0;
1569 usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1570 return err_code;
1571 }
1572
1573 /*******************************
1574 * usbvision utility functions
1575 *******************************/
1576
1577 int usbvision_power_off(struct usb_usbvision *usbvision)
1578 {
1579 int err_code = 0;
1580
1581 PDEBUG(DBG_FUNC, "");
1582
1583 err_code = usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
1584 if (err_code == 1)
1585 usbvision->power = 0;
1586 PDEBUG(DBG_FUNC, "%s: err_code %d", (err_code != 1) ? "ERROR" : "power is off", err_code);
1587 return err_code;
1588 }
1589
1590 /* configure webcam image sensor using the serial port */
1591 static int usbvision_init_webcam(struct usb_usbvision *usbvision)
1592 {
1593 int rc;
1594 int i;
1595 static char init_values[38][3] = {
1596 { 0x04, 0x12, 0x08 }, { 0x05, 0xff, 0xc8 }, { 0x06, 0x18, 0x07 }, { 0x07, 0x90, 0x00 },
1597 { 0x09, 0x00, 0x00 }, { 0x0a, 0x00, 0x00 }, { 0x0b, 0x08, 0x00 }, { 0x0d, 0xcc, 0xcc },
1598 { 0x0e, 0x13, 0x14 }, { 0x10, 0x9b, 0x83 }, { 0x11, 0x5a, 0x3f }, { 0x12, 0xe4, 0x73 },
1599 { 0x13, 0x88, 0x84 }, { 0x14, 0x89, 0x80 }, { 0x15, 0x00, 0x20 }, { 0x16, 0x00, 0x00 },
1600 { 0x17, 0xff, 0xa0 }, { 0x18, 0x6b, 0x20 }, { 0x19, 0x22, 0x40 }, { 0x1a, 0x10, 0x07 },
1601 { 0x1b, 0x00, 0x47 }, { 0x1c, 0x03, 0xe0 }, { 0x1d, 0x00, 0x00 }, { 0x1e, 0x00, 0x00 },
1602 { 0x1f, 0x00, 0x00 }, { 0x20, 0x00, 0x00 }, { 0x21, 0x00, 0x00 }, { 0x22, 0x00, 0x00 },
1603 { 0x23, 0x00, 0x00 }, { 0x24, 0x00, 0x00 }, { 0x25, 0x00, 0x00 }, { 0x26, 0x00, 0x00 },
1604 { 0x27, 0x00, 0x00 }, { 0x28, 0x00, 0x00 }, { 0x29, 0x00, 0x00 }, { 0x08, 0x80, 0x60 },
1605 { 0x0f, 0x2d, 0x24 }, { 0x0c, 0x80, 0x80 }
1606 };
1607 char value[3];
1608
1609 /* the only difference between PAL and NTSC init_values */
1610 if (usbvision_device_data[usbvision->dev_model].video_norm == V4L2_STD_NTSC)
1611 init_values[4][1] = 0x34;
1612
1613 for (i = 0; i < sizeof(init_values) / 3; i++) {
1614 usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT);
1615 memcpy(value, init_values[i], 3);
1616 rc = usb_control_msg(usbvision->dev,
1617 usb_sndctrlpipe(usbvision->dev, 1),
1618 USBVISION_OP_CODE,
1619 USB_DIR_OUT | USB_TYPE_VENDOR |
1620 USB_RECIP_ENDPOINT, 0,
1621 (__u16) USBVISION_SER_DAT1, value,
1622 3, HZ);
1623 if (rc < 0)
1624 return rc;
1625 usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SIO);
1626 /* write 3 bytes to the serial port using SIO mode */
1627 usbvision_write_reg(usbvision, USBVISION_SER_CONT, 3 | 0x10);
1628 usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, 0);
1629 usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT);
1630 usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, USBVISION_IO_2);
1631 usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT | USBVISION_CLK_OUT);
1632 usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT | USBVISION_DAT_IO);
1633 usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT | USBVISION_CLK_OUT | USBVISION_DAT_IO);
1634 }
1635
1636 return 0;
1637 }
1638
1639 /*
1640 * usbvision_set_video_format()
1641 *
1642 */
1643 static int usbvision_set_video_format(struct usb_usbvision *usbvision, int format)
1644 {
1645 static const char proc[] = "usbvision_set_video_format";
1646 int rc;
1647 unsigned char value[2];
1648
1649 if (!USBVISION_IS_OPERATIONAL(usbvision))
1650 return 0;
1651
1652 PDEBUG(DBG_FUNC, "isoc_mode %#02x", format);
1653
1654 if ((format != ISOC_MODE_YUV422)
1655 && (format != ISOC_MODE_YUV420)
1656 && (format != ISOC_MODE_COMPRESS)) {
1657 printk(KERN_ERR "usbvision: unknown video format %02x, using default YUV420",
1658 format);
1659 format = ISOC_MODE_YUV420;
1660 }
1661 value[0] = 0x0A; /* TODO: See the effect of the filter */
1662 value[1] = format; /* Sets the VO_MODE register which follows FILT_CONT */
1663 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1664 USBVISION_OP_CODE,
1665 USB_DIR_OUT | USB_TYPE_VENDOR |
1666 USB_RECIP_ENDPOINT, 0,
1667 (__u16) USBVISION_FILT_CONT, value, 2, HZ);
1668
1669 if (rc < 0) {
1670 printk(KERN_ERR "%s: ERROR=%d. USBVISION stopped - "
1671 "reconnect or reload driver.\n", proc, rc);
1672 }
1673 usbvision->isoc_mode = format;
1674 return rc;
1675 }
1676
1677 /*
1678 * usbvision_set_output()
1679 *
1680 */
1681
1682 int usbvision_set_output(struct usb_usbvision *usbvision, int width,
1683 int height)
1684 {
1685 int err_code = 0;
1686 int usb_width, usb_height;
1687 unsigned int frame_rate = 0, frame_drop = 0;
1688 unsigned char value[4];
1689
1690 if (!USBVISION_IS_OPERATIONAL(usbvision))
1691 return 0;
1692
1693 if (width > MAX_USB_WIDTH) {
1694 usb_width = width / 2;
1695 usbvision->stretch_width = 2;
1696 } else {
1697 usb_width = width;
1698 usbvision->stretch_width = 1;
1699 }
1700
1701 if (height > MAX_USB_HEIGHT) {
1702 usb_height = height / 2;
1703 usbvision->stretch_height = 2;
1704 } else {
1705 usb_height = height;
1706 usbvision->stretch_height = 1;
1707 }
1708
1709 RESTRICT_TO_RANGE(usb_width, MIN_FRAME_WIDTH, MAX_USB_WIDTH);
1710 usb_width &= ~(MIN_FRAME_WIDTH-1);
1711 RESTRICT_TO_RANGE(usb_height, MIN_FRAME_HEIGHT, MAX_USB_HEIGHT);
1712 usb_height &= ~(1);
1713
1714 PDEBUG(DBG_FUNC, "usb %dx%d; screen %dx%d; stretch %dx%d",
1715 usb_width, usb_height, width, height,
1716 usbvision->stretch_width, usbvision->stretch_height);
1717
1718 /* I'll not rewrite the same values */
1719 if ((usb_width != usbvision->curwidth) || (usb_height != usbvision->curheight)) {
1720 value[0] = usb_width & 0xff; /* LSB */
1721 value[1] = (usb_width >> 8) & 0x03; /* MSB */
1722 value[2] = usb_height & 0xff; /* LSB */
1723 value[3] = (usb_height >> 8) & 0x03; /* MSB */
1724
1725 err_code = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1726 USBVISION_OP_CODE,
1727 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1728 0, (__u16) USBVISION_LXSIZE_O, value, 4, HZ);
1729
1730 if (err_code < 0) {
1731 dev_err(&usbvision->dev->dev,
1732 "%s failed: error %d\n", __func__, err_code);
1733 return err_code;
1734 }
1735 usbvision->curwidth = usbvision->stretch_width * usb_width;
1736 usbvision->curheight = usbvision->stretch_height * usb_height;
1737 }
1738
1739 if (usbvision->isoc_mode == ISOC_MODE_YUV422)
1740 frame_rate = (usbvision->isoc_packet_size * 1000) / (usb_width * usb_height * 2);
1741 else if (usbvision->isoc_mode == ISOC_MODE_YUV420)
1742 frame_rate = (usbvision->isoc_packet_size * 1000) / ((usb_width * usb_height * 12) / 8);
1743 else
1744 frame_rate = FRAMERATE_MAX;
1745
1746 if (usbvision->tvnorm_id & V4L2_STD_625_50)
1747 frame_drop = frame_rate * 32 / 25 - 1;
1748 else if (usbvision->tvnorm_id & V4L2_STD_525_60)
1749 frame_drop = frame_rate * 32 / 30 - 1;
1750
1751 RESTRICT_TO_RANGE(frame_drop, FRAMERATE_MIN, FRAMERATE_MAX);
1752
1753 PDEBUG(DBG_FUNC, "frame_rate %d fps, frame_drop %d", frame_rate, frame_drop);
1754
1755 frame_drop = FRAMERATE_MAX; /* We can allow the maximum here, because dropping is controlled */
1756
1757 if (usbvision_device_data[usbvision->dev_model].codec == CODEC_WEBCAM) {
1758 if (usbvision_device_data[usbvision->dev_model].video_norm == V4L2_STD_PAL)
1759 frame_drop = 25;
1760 else
1761 frame_drop = 30;
1762 }
1763
1764 /* frame_drop = 7; => frame_phase = 1, 5, 9, 13, 17, 21, 25, 0, 4, 8, ...
1765 => frame_skip = 4;
1766 => frame_rate = (7 + 1) * 25 / 32 = 200 / 32 = 6.25;
1767
1768 frame_drop = 9; => frame_phase = 1, 5, 8, 11, 14, 17, 21, 24, 27, 1, 4, 8, ...
1769 => frame_skip = 4, 3, 3, 3, 3, 4, 3, 3, 3, 3, 4, ...
1770 => frame_rate = (9 + 1) * 25 / 32 = 250 / 32 = 7.8125;
1771 */
1772 err_code = usbvision_write_reg(usbvision, USBVISION_FRM_RATE, frame_drop);
1773 return err_code;
1774 }
1775
1776
1777 /*
1778 * usbvision_frames_alloc
1779 * allocate the required frames
1780 */
1781 int usbvision_frames_alloc(struct usb_usbvision *usbvision, int number_of_frames)
1782 {
1783 int i;
1784
1785 /* needs to be page aligned cause the buffers can be mapped individually! */
1786 usbvision->max_frame_size = PAGE_ALIGN(usbvision->curwidth *
1787 usbvision->curheight *
1788 usbvision->palette.bytes_per_pixel);
1789
1790 /* Try to do my best to allocate the frames the user want in the remaining memory */
1791 usbvision->num_frames = number_of_frames;
1792 while (usbvision->num_frames > 0) {
1793 usbvision->fbuf_size = usbvision->num_frames * usbvision->max_frame_size;
1794 usbvision->fbuf = usbvision_rvmalloc(usbvision->fbuf_size);
1795 if (usbvision->fbuf)
1796 break;
1797 usbvision->num_frames--;
1798 }
1799
1800 spin_lock_init(&usbvision->queue_lock);
1801 init_waitqueue_head(&usbvision->wait_frame);
1802 init_waitqueue_head(&usbvision->wait_stream);
1803
1804 /* Allocate all buffers */
1805 for (i = 0; i < usbvision->num_frames; i++) {
1806 usbvision->frame[i].index = i;
1807 usbvision->frame[i].grabstate = frame_state_unused;
1808 usbvision->frame[i].data = usbvision->fbuf +
1809 i * usbvision->max_frame_size;
1810 /*
1811 * Set default sizes for read operation.
1812 */
1813 usbvision->stretch_width = 1;
1814 usbvision->stretch_height = 1;
1815 usbvision->frame[i].width = usbvision->curwidth;
1816 usbvision->frame[i].height = usbvision->curheight;
1817 usbvision->frame[i].bytes_read = 0;
1818 }
1819 PDEBUG(DBG_FUNC, "allocated %d frames (%d bytes per frame)",
1820 usbvision->num_frames, usbvision->max_frame_size);
1821 return usbvision->num_frames;
1822 }
1823
1824 /*
1825 * usbvision_frames_free
1826 * frees memory allocated for the frames
1827 */
1828 void usbvision_frames_free(struct usb_usbvision *usbvision)
1829 {
1830 /* Have to free all that memory */
1831 PDEBUG(DBG_FUNC, "free %d frames", usbvision->num_frames);
1832
1833 if (usbvision->fbuf != NULL) {
1834 usbvision_rvfree(usbvision->fbuf, usbvision->fbuf_size);
1835 usbvision->fbuf = NULL;
1836
1837 usbvision->num_frames = 0;
1838 }
1839 }
1840 /*
1841 * usbvision_empty_framequeues()
1842 * prepare queues for incoming and outgoing frames
1843 */
1844 void usbvision_empty_framequeues(struct usb_usbvision *usbvision)
1845 {
1846 u32 i;
1847
1848 INIT_LIST_HEAD(&(usbvision->inqueue));
1849 INIT_LIST_HEAD(&(usbvision->outqueue));
1850
1851 for (i = 0; i < USBVISION_NUMFRAMES; i++) {
1852 usbvision->frame[i].grabstate = frame_state_unused;
1853 usbvision->frame[i].bytes_read = 0;
1854 }
1855 }
1856
1857 /*
1858 * usbvision_stream_interrupt()
1859 * stops streaming
1860 */
1861 int usbvision_stream_interrupt(struct usb_usbvision *usbvision)
1862 {
1863 int ret = 0;
1864
1865 /* stop reading from the device */
1866
1867 usbvision->streaming = stream_interrupt;
1868 ret = wait_event_timeout(usbvision->wait_stream,
1869 (usbvision->streaming == stream_idle),
1870 msecs_to_jiffies(USBVISION_NUMSBUF*USBVISION_URB_FRAMES));
1871 return ret;
1872 }
1873
1874 /*
1875 * usbvision_set_compress_params()
1876 *
1877 */
1878
1879 static int usbvision_set_compress_params(struct usb_usbvision *usbvision)
1880 {
1881 static const char proc[] = "usbvision_set_compresion_params: ";
1882 int rc;
1883 unsigned char value[6];
1884
1885 value[0] = 0x0F; /* Intra-Compression cycle */
1886 value[1] = 0x01; /* Reg.45 one line per strip */
1887 value[2] = 0x00; /* Reg.46 Force intra mode on all new frames */
1888 value[3] = 0x00; /* Reg.47 FORCE_UP <- 0 normal operation (not force) */
1889 value[4] = 0xA2; /* Reg.48 BUF_THR I'm not sure if this does something in not compressed mode. */
1890 value[5] = 0x00; /* Reg.49 DVI_YUV This has nothing to do with compression */
1891
1892 /* catched values for NT1004 */
1893 /* value[0] = 0xFF; Never apply intra mode automatically */
1894 /* value[1] = 0xF1; Use full frame height for virtual strip width; One line per strip */
1895 /* value[2] = 0x01; Force intra mode on all new frames */
1896 /* value[3] = 0x00; Strip size 400 Bytes; do not force up */
1897 /* value[4] = 0xA2; */
1898 if (!USBVISION_IS_OPERATIONAL(usbvision))
1899 return 0;
1900
1901 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1902 USBVISION_OP_CODE,
1903 USB_DIR_OUT | USB_TYPE_VENDOR |
1904 USB_RECIP_ENDPOINT, 0,
1905 (__u16) USBVISION_INTRA_CYC, value, 5, HZ);
1906
1907 if (rc < 0) {
1908 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
1909 "reconnect or reload driver.\n", proc, rc);
1910 return rc;
1911 }
1912
1913 if (usbvision->bridge_type == BRIDGE_NT1004) {
1914 value[0] = 20; /* PCM Threshold 1 */
1915 value[1] = 12; /* PCM Threshold 2 */
1916 value[2] = 255; /* Distortion Threshold inter */
1917 value[3] = 255; /* Distortion Threshold intra */
1918 value[4] = 43; /* Max Distortion inter */
1919 value[5] = 43; /* Max Distortion intra */
1920 } else {
1921 value[0] = 20; /* PCM Threshold 1 */
1922 value[1] = 12; /* PCM Threshold 2 */
1923 value[2] = 255; /* Distortion Threshold d7-d0 */
1924 value[3] = 0; /* Distortion Threshold d11-d8 */
1925 value[4] = 43; /* Max Distortion d7-d0 */
1926 value[5] = 0; /* Max Distortion d8 */
1927 }
1928
1929 if (!USBVISION_IS_OPERATIONAL(usbvision))
1930 return 0;
1931
1932 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1933 USBVISION_OP_CODE,
1934 USB_DIR_OUT | USB_TYPE_VENDOR |
1935 USB_RECIP_ENDPOINT, 0,
1936 (__u16) USBVISION_PCM_THR1, value, 6, HZ);
1937
1938 if (rc < 0) {
1939 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
1940 "reconnect or reload driver.\n", proc, rc);
1941 }
1942 return rc;
1943 }
1944
1945
1946 /*
1947 * usbvision_set_input()
1948 *
1949 * Set the input (saa711x, ...) size x y and other misc input params
1950 * I've no idea if this parameters are right
1951 *
1952 */
1953 int usbvision_set_input(struct usb_usbvision *usbvision)
1954 {
1955 static const char proc[] = "usbvision_set_input: ";
1956 int rc;
1957 unsigned char value[8];
1958 unsigned char dvi_yuv_value;
1959
1960 if (!USBVISION_IS_OPERATIONAL(usbvision))
1961 return 0;
1962
1963 /* Set input format expected from decoder*/
1964 if (usbvision_device_data[usbvision->dev_model].vin_reg1_override) {
1965 value[0] = usbvision_device_data[usbvision->dev_model].vin_reg1;
1966 } else if (usbvision_device_data[usbvision->dev_model].codec == CODEC_SAA7113) {
1967 /* SAA7113 uses 8 bit output */
1968 value[0] = USBVISION_8_422_SYNC;
1969 } else {
1970 /* I'm sure only about d2-d0 [010] 16 bit 4:2:2 usin sync pulses
1971 * as that is how saa7111 is configured */
1972 value[0] = USBVISION_16_422_SYNC;
1973 /* | USBVISION_VSNC_POL | USBVISION_VCLK_POL);*/
1974 }
1975
1976 rc = usbvision_write_reg(usbvision, USBVISION_VIN_REG1, value[0]);
1977 if (rc < 0) {
1978 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
1979 "reconnect or reload driver.\n", proc, rc);
1980 return rc;
1981 }
1982
1983
1984 if (usbvision->tvnorm_id & V4L2_STD_PAL) {
1985 value[0] = 0xC0;
1986 value[1] = 0x02; /* 0x02C0 -> 704 Input video line length */
1987 value[2] = 0x20;
1988 value[3] = 0x01; /* 0x0120 -> 288 Input video n. of lines */
1989 value[4] = 0x60;
1990 value[5] = 0x00; /* 0x0060 -> 96 Input video h offset */
1991 value[6] = 0x16;
1992 value[7] = 0x00; /* 0x0016 -> 22 Input video v offset */
1993 } else if (usbvision->tvnorm_id & V4L2_STD_SECAM) {
1994 value[0] = 0xC0;
1995 value[1] = 0x02; /* 0x02C0 -> 704 Input video line length */
1996 value[2] = 0x20;
1997 value[3] = 0x01; /* 0x0120 -> 288 Input video n. of lines */
1998 value[4] = 0x01;
1999 value[5] = 0x00; /* 0x0001 -> 01 Input video h offset */
2000 value[6] = 0x01;
2001 value[7] = 0x00; /* 0x0001 -> 01 Input video v offset */
2002 } else { /* V4L2_STD_NTSC */
2003 value[0] = 0xD0;
2004 value[1] = 0x02; /* 0x02D0 -> 720 Input video line length */
2005 value[2] = 0xF0;
2006 value[3] = 0x00; /* 0x00F0 -> 240 Input video number of lines */
2007 value[4] = 0x50;
2008 value[5] = 0x00; /* 0x0050 -> 80 Input video h offset */
2009 value[6] = 0x10;
2010 value[7] = 0x00; /* 0x0010 -> 16 Input video v offset */
2011 }
2012
2013 /* webcam is only 480 pixels wide, both PAL and NTSC version */
2014 if (usbvision_device_data[usbvision->dev_model].codec == CODEC_WEBCAM) {
2015 value[0] = 0xe0;
2016 value[1] = 0x01; /* 0x01E0 -> 480 Input video line length */
2017 }
2018
2019 if (usbvision_device_data[usbvision->dev_model].x_offset >= 0) {
2020 value[4] = usbvision_device_data[usbvision->dev_model].x_offset & 0xff;
2021 value[5] = (usbvision_device_data[usbvision->dev_model].x_offset & 0x0300) >> 8;
2022 }
2023
2024 if (adjust_x_offset != -1) {
2025 value[4] = adjust_x_offset & 0xff;
2026 value[5] = (adjust_x_offset & 0x0300) >> 8;
2027 }
2028
2029 if (usbvision_device_data[usbvision->dev_model].y_offset >= 0) {
2030 value[6] = usbvision_device_data[usbvision->dev_model].y_offset & 0xff;
2031 value[7] = (usbvision_device_data[usbvision->dev_model].y_offset & 0x0300) >> 8;
2032 }
2033
2034 if (adjust_y_offset != -1) {
2035 value[6] = adjust_y_offset & 0xff;
2036 value[7] = (adjust_y_offset & 0x0300) >> 8;
2037 }
2038
2039 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2040 USBVISION_OP_CODE, /* USBVISION specific code */
2041 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0,
2042 (__u16) USBVISION_LXSIZE_I, value, 8, HZ);
2043 if (rc < 0) {
2044 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2045 "reconnect or reload driver.\n", proc, rc);
2046 return rc;
2047 }
2048
2049
2050 dvi_yuv_value = 0x00; /* U comes after V, Ya comes after U/V, Yb comes after Yb */
2051
2052 if (usbvision_device_data[usbvision->dev_model].dvi_yuv_override) {
2053 dvi_yuv_value = usbvision_device_data[usbvision->dev_model].dvi_yuv;
2054 } else if (usbvision_device_data[usbvision->dev_model].codec == CODEC_SAA7113) {
2055 /* This changes as the fine sync control changes. Further investigation necessary */
2056 dvi_yuv_value = 0x06;
2057 }
2058
2059 return usbvision_write_reg(usbvision, USBVISION_DVI_YUV, dvi_yuv_value);
2060 }
2061
2062
2063 /*
2064 * usbvision_set_dram_settings()
2065 *
2066 * Set the buffer address needed by the usbvision dram to operate
2067 * This values has been taken with usbsnoop.
2068 *
2069 */
2070
2071 static int usbvision_set_dram_settings(struct usb_usbvision *usbvision)
2072 {
2073 int rc;
2074 unsigned char value[8];
2075
2076 if (usbvision->isoc_mode == ISOC_MODE_COMPRESS) {
2077 value[0] = 0x42;
2078 value[1] = 0x71;
2079 value[2] = 0xff;
2080 value[3] = 0x00;
2081 value[4] = 0x98;
2082 value[5] = 0xe0;
2083 value[6] = 0x71;
2084 value[7] = 0xff;
2085 /* UR: 0x0E200-0x3FFFF = 204288 Words (1 Word = 2 Byte) */
2086 /* FDL: 0x00000-0x0E099 = 57498 Words */
2087 /* VDW: 0x0E3FF-0x3FFFF */
2088 } else {
2089 value[0] = 0x42;
2090 value[1] = 0x00;
2091 value[2] = 0xff;
2092 value[3] = 0x00;
2093 value[4] = 0x00;
2094 value[5] = 0x00;
2095 value[6] = 0x00;
2096 value[7] = 0xff;
2097 }
2098 /* These are the values of the address of the video buffer,
2099 * they have to be loaded into the USBVISION_DRM_PRM1-8
2100 *
2101 * Start address of video output buffer for read: drm_prm1-2 -> 0x00000
2102 * End address of video output buffer for read: drm_prm1-3 -> 0x1ffff
2103 * Start address of video frame delay buffer: drm_prm1-4 -> 0x20000
2104 * Only used in compressed mode
2105 * End address of video frame delay buffer: drm_prm1-5-6 -> 0x3ffff
2106 * Only used in compressed mode
2107 * Start address of video output buffer for write: drm_prm1-7 -> 0x00000
2108 * End address of video output buffer for write: drm_prm1-8 -> 0x1ffff
2109 */
2110
2111 if (!USBVISION_IS_OPERATIONAL(usbvision))
2112 return 0;
2113
2114 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2115 USBVISION_OP_CODE, /* USBVISION specific code */
2116 USB_DIR_OUT | USB_TYPE_VENDOR |
2117 USB_RECIP_ENDPOINT, 0,
2118 (__u16) USBVISION_DRM_PRM1, value, 8, HZ);
2119
2120 if (rc < 0) {
2121 dev_err(&usbvision->dev->dev, "%s: ERROR=%d\n", __func__, rc);
2122 return rc;
2123 }
2124
2125 /* Restart the video buffer logic */
2126 rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, USBVISION_RES_UR |
2127 USBVISION_RES_FDL | USBVISION_RES_VDW);
2128 if (rc < 0)
2129 return rc;
2130 rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, 0x00);
2131
2132 return rc;
2133 }
2134
2135 /*
2136 * ()
2137 *
2138 * Power on the device, enables suspend-resume logic
2139 * & reset the isoc End-Point
2140 *
2141 */
2142
2143 int usbvision_power_on(struct usb_usbvision *usbvision)
2144 {
2145 int err_code = 0;
2146
2147 PDEBUG(DBG_FUNC, "");
2148
2149 usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
2150 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2151 USBVISION_SSPND_EN | USBVISION_RES2);
2152
2153 if (usbvision_device_data[usbvision->dev_model].codec == CODEC_WEBCAM) {
2154 usbvision_write_reg(usbvision, USBVISION_VIN_REG1,
2155 USBVISION_16_422_SYNC | USBVISION_HVALID_PO);
2156 usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
2157 USBVISION_NOHVALID | USBVISION_KEEP_BLANK);
2158 }
2159 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2160 USBVISION_SSPND_EN | USBVISION_PWR_VID);
2161 mdelay(10);
2162 err_code = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2163 USBVISION_SSPND_EN | USBVISION_PWR_VID | USBVISION_RES2);
2164 if (err_code == 1)
2165 usbvision->power = 1;
2166 PDEBUG(DBG_FUNC, "%s: err_code %d", (err_code < 0) ? "ERROR" : "power is on", err_code);
2167 return err_code;
2168 }
2169
2170
2171 /*
2172 * usbvision timer stuff
2173 */
2174
2175 /* to call usbvision_power_off from task queue */
2176 static void call_usbvision_power_off(struct work_struct *work)
2177 {
2178 struct usb_usbvision *usbvision = container_of(work, struct usb_usbvision, power_off_work);
2179
2180 PDEBUG(DBG_FUNC, "");
2181 if (mutex_lock_interruptible(&usbvision->v4l2_lock))
2182 return;
2183
2184 if (usbvision->user == 0) {
2185 usbvision_i2c_unregister(usbvision);
2186
2187 usbvision_power_off(usbvision);
2188 usbvision->initialized = 0;
2189 }
2190 mutex_unlock(&usbvision->v4l2_lock);
2191 }
2192
2193 static void usbvision_power_off_timer(unsigned long data)
2194 {
2195 struct usb_usbvision *usbvision = (void *)data;
2196
2197 PDEBUG(DBG_FUNC, "");
2198 del_timer(&usbvision->power_off_timer);
2199 INIT_WORK(&usbvision->power_off_work, call_usbvision_power_off);
2200 (void) schedule_work(&usbvision->power_off_work);
2201 }
2202
2203 void usbvision_init_power_off_timer(struct usb_usbvision *usbvision)
2204 {
2205 init_timer(&usbvision->power_off_timer);
2206 usbvision->power_off_timer.data = (long)usbvision;
2207 usbvision->power_off_timer.function = usbvision_power_off_timer;
2208 }
2209
2210 void usbvision_set_power_off_timer(struct usb_usbvision *usbvision)
2211 {
2212 mod_timer(&usbvision->power_off_timer, jiffies + USBVISION_POWEROFF_TIME);
2213 }
2214
2215 void usbvision_reset_power_off_timer(struct usb_usbvision *usbvision)
2216 {
2217 if (timer_pending(&usbvision->power_off_timer))
2218 del_timer(&usbvision->power_off_timer);
2219 }
2220
2221 /*
2222 * usbvision_begin_streaming()
2223 * Sure you have to put bit 7 to 0, if not incoming frames are droped, but no
2224 * idea about the rest
2225 */
2226 int usbvision_begin_streaming(struct usb_usbvision *usbvision)
2227 {
2228 if (usbvision->isoc_mode == ISOC_MODE_COMPRESS)
2229 usbvision_init_compression(usbvision);
2230 return usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
2231 USBVISION_NOHVALID | usbvision->vin_reg2_preset);
2232 }
2233
2234 /*
2235 * usbvision_restart_isoc()
2236 * Not sure yet if touching here PWR_REG make loose the config
2237 */
2238
2239 int usbvision_restart_isoc(struct usb_usbvision *usbvision)
2240 {
2241 int ret;
2242
2243 ret = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2244 USBVISION_SSPND_EN | USBVISION_PWR_VID);
2245 if (ret < 0)
2246 return ret;
2247 ret = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2248 USBVISION_SSPND_EN | USBVISION_PWR_VID |
2249 USBVISION_RES2);
2250 if (ret < 0)
2251 return ret;
2252 ret = usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
2253 USBVISION_KEEP_BLANK | USBVISION_NOHVALID |
2254 usbvision->vin_reg2_preset);
2255 if (ret < 0)
2256 return ret;
2257
2258 /* TODO: schedule timeout */
2259 while ((usbvision_read_reg(usbvision, USBVISION_STATUS_REG) & 0x01) != 1)
2260 ;
2261
2262 return 0;
2263 }
2264
2265 int usbvision_audio_off(struct usb_usbvision *usbvision)
2266 {
2267 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, USBVISION_AUDIO_MUTE) < 0) {
2268 printk(KERN_ERR "usbvision_audio_off: can't write reg\n");
2269 return -1;
2270 }
2271 usbvision->audio_mute = 0;
2272 usbvision->audio_channel = USBVISION_AUDIO_MUTE;
2273 return 0;
2274 }
2275
2276 int usbvision_set_audio(struct usb_usbvision *usbvision, int audio_channel)
2277 {
2278 if (!usbvision->audio_mute) {
2279 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, audio_channel) < 0) {
2280 printk(KERN_ERR "usbvision_set_audio: can't write iopin register for audio switching\n");
2281 return -1;
2282 }
2283 }
2284 usbvision->audio_channel = audio_channel;
2285 return 0;
2286 }
2287
2288 int usbvision_setup(struct usb_usbvision *usbvision, int format)
2289 {
2290 if (usbvision_device_data[usbvision->dev_model].codec == CODEC_WEBCAM)
2291 usbvision_init_webcam(usbvision);
2292 usbvision_set_video_format(usbvision, format);
2293 usbvision_set_dram_settings(usbvision);
2294 usbvision_set_compress_params(usbvision);
2295 usbvision_set_input(usbvision);
2296 usbvision_set_output(usbvision, MAX_USB_WIDTH, MAX_USB_HEIGHT);
2297 usbvision_restart_isoc(usbvision);
2298
2299 /* cosas del PCM */
2300 return USBVISION_IS_OPERATIONAL(usbvision);
2301 }
2302
2303 int usbvision_set_alternate(struct usb_usbvision *dev)
2304 {
2305 int err_code, prev_alt = dev->iface_alt;
2306 int i;
2307
2308 dev->iface_alt = 0;
2309 for (i = 0; i < dev->num_alt; i++)
2310 if (dev->alt_max_pkt_size[i] > dev->alt_max_pkt_size[dev->iface_alt])
2311 dev->iface_alt = i;
2312
2313 if (dev->iface_alt != prev_alt) {
2314 dev->isoc_packet_size = dev->alt_max_pkt_size[dev->iface_alt];
2315 PDEBUG(DBG_FUNC, "setting alternate %d with max_packet_size=%u",
2316 dev->iface_alt, dev->isoc_packet_size);
2317 err_code = usb_set_interface(dev->dev, dev->iface, dev->iface_alt);
2318 if (err_code < 0) {
2319 dev_err(&dev->dev->dev,
2320 "cannot change alternate number to %d (error=%i)\n",
2321 dev->iface_alt, err_code);
2322 return err_code;
2323 }
2324 }
2325
2326 PDEBUG(DBG_ISOC, "ISO Packet Length:%d", dev->isoc_packet_size);
2327
2328 return 0;
2329 }
2330
2331 /*
2332 * usbvision_init_isoc()
2333 *
2334 */
2335 int usbvision_init_isoc(struct usb_usbvision *usbvision)
2336 {
2337 struct usb_device *dev = usbvision->dev;
2338 int buf_idx, err_code, reg_value;
2339 int sb_size;
2340
2341 if (!USBVISION_IS_OPERATIONAL(usbvision))
2342 return -EFAULT;
2343
2344 usbvision->cur_frame = NULL;
2345 scratch_reset(usbvision);
2346
2347 /* Alternate interface 1 is is the biggest frame size */
2348 err_code = usbvision_set_alternate(usbvision);
2349 if (err_code < 0) {
2350 usbvision->last_error = err_code;
2351 return -EBUSY;
2352 }
2353 sb_size = USBVISION_URB_FRAMES * usbvision->isoc_packet_size;
2354
2355 reg_value = (16 - usbvision_read_reg(usbvision,
2356 USBVISION_ALTER_REG)) & 0x0F;
2357
2358 usbvision->usb_bandwidth = reg_value >> 1;
2359 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec",
2360 usbvision->usb_bandwidth);
2361
2362
2363
2364 /* We double buffer the Iso lists */
2365
2366 for (buf_idx = 0; buf_idx < USBVISION_NUMSBUF; buf_idx++) {
2367 int j, k;
2368 struct urb *urb;
2369
2370 urb = usb_alloc_urb(USBVISION_URB_FRAMES, GFP_KERNEL);
2371 if (urb == NULL) {
2372 dev_err(&usbvision->dev->dev,
2373 "%s: usb_alloc_urb() failed\n", __func__);
2374 return -ENOMEM;
2375 }
2376 usbvision->sbuf[buf_idx].urb = urb;
2377 usbvision->sbuf[buf_idx].data =
2378 usb_alloc_coherent(usbvision->dev,
2379 sb_size,
2380 GFP_KERNEL,
2381 &urb->transfer_dma);
2382 urb->dev = dev;
2383 urb->context = usbvision;
2384 urb->pipe = usb_rcvisocpipe(dev, usbvision->video_endp);
2385 urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
2386 urb->interval = 1;
2387 urb->transfer_buffer = usbvision->sbuf[buf_idx].data;
2388 urb->complete = usbvision_isoc_irq;
2389 urb->number_of_packets = USBVISION_URB_FRAMES;
2390 urb->transfer_buffer_length =
2391 usbvision->isoc_packet_size * USBVISION_URB_FRAMES;
2392 for (j = k = 0; j < USBVISION_URB_FRAMES; j++,
2393 k += usbvision->isoc_packet_size) {
2394 urb->iso_frame_desc[j].offset = k;
2395 urb->iso_frame_desc[j].length =
2396 usbvision->isoc_packet_size;
2397 }
2398 }
2399
2400 /* Submit all URBs */
2401 for (buf_idx = 0; buf_idx < USBVISION_NUMSBUF; buf_idx++) {
2402 err_code = usb_submit_urb(usbvision->sbuf[buf_idx].urb,
2403 GFP_KERNEL);
2404 if (err_code) {
2405 dev_err(&usbvision->dev->dev,
2406 "%s: usb_submit_urb(%d) failed: error %d\n",
2407 __func__, buf_idx, err_code);
2408 }
2409 }
2410
2411 usbvision->streaming = stream_idle;
2412 PDEBUG(DBG_ISOC, "%s: streaming=1 usbvision->video_endp=$%02x",
2413 __func__,
2414 usbvision->video_endp);
2415 return 0;
2416 }
2417
2418 /*
2419 * usbvision_stop_isoc()
2420 *
2421 * This procedure stops streaming and deallocates URBs. Then it
2422 * activates zero-bandwidth alt. setting of the video interface.
2423 *
2424 */
2425 void usbvision_stop_isoc(struct usb_usbvision *usbvision)
2426 {
2427 int buf_idx, err_code, reg_value;
2428 int sb_size = USBVISION_URB_FRAMES * usbvision->isoc_packet_size;
2429
2430 if ((usbvision->streaming == stream_off) || (usbvision->dev == NULL))
2431 return;
2432
2433 /* Unschedule all of the iso td's */
2434 for (buf_idx = 0; buf_idx < USBVISION_NUMSBUF; buf_idx++) {
2435 usb_kill_urb(usbvision->sbuf[buf_idx].urb);
2436 if (usbvision->sbuf[buf_idx].data) {
2437 usb_free_coherent(usbvision->dev,
2438 sb_size,
2439 usbvision->sbuf[buf_idx].data,
2440 usbvision->sbuf[buf_idx].urb->transfer_dma);
2441 }
2442 usb_free_urb(usbvision->sbuf[buf_idx].urb);
2443 usbvision->sbuf[buf_idx].urb = NULL;
2444 }
2445
2446 PDEBUG(DBG_ISOC, "%s: streaming=stream_off\n", __func__);
2447 usbvision->streaming = stream_off;
2448
2449 if (!usbvision->remove_pending) {
2450 /* Set packet size to 0 */
2451 usbvision->iface_alt = 0;
2452 err_code = usb_set_interface(usbvision->dev, usbvision->iface,
2453 usbvision->iface_alt);
2454 if (err_code < 0) {
2455 dev_err(&usbvision->dev->dev,
2456 "%s: usb_set_interface() failed: error %d\n",
2457 __func__, err_code);
2458 usbvision->last_error = err_code;
2459 }
2460 reg_value = (16-usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F;
2461 usbvision->isoc_packet_size =
2462 (reg_value == 0) ? 0 : (reg_value * 64) - 1;
2463 PDEBUG(DBG_ISOC, "ISO Packet Length:%d",
2464 usbvision->isoc_packet_size);
2465
2466 usbvision->usb_bandwidth = reg_value >> 1;
2467 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec",
2468 usbvision->usb_bandwidth);
2469 }
2470 }
2471
2472 int usbvision_muxsel(struct usb_usbvision *usbvision, int channel)
2473 {
2474 /* inputs #0 and #3 are constant for every SAA711x. */
2475 /* inputs #1 and #2 are variable for SAA7111 and SAA7113 */
2476 int mode[4] = { SAA7115_COMPOSITE0, 0, 0, SAA7115_COMPOSITE3 };
2477 int audio[] = { 1, 0, 0, 0 };
2478 /* channel 0 is TV with audiochannel 1 (tuner mono) */
2479 /* channel 1 is Composite with audio channel 0 (line in) */
2480 /* channel 2 is S-Video with audio channel 0 (line in) */
2481 /* channel 3 is additional video inputs to the device with audio channel 0 (line in) */
2482
2483 RESTRICT_TO_RANGE(channel, 0, usbvision->video_inputs);
2484 usbvision->ctl_input = channel;
2485
2486 /* set the new channel */
2487 /* Regular USB TV Tuners -> channel: 0 = Television, 1 = Composite, 2 = S-Video */
2488 /* Four video input devices -> channel: 0 = Chan White, 1 = Chan Green, 2 = Chan Yellow, 3 = Chan Red */
2489
2490 switch (usbvision_device_data[usbvision->dev_model].codec) {
2491 case CODEC_SAA7113:
2492 mode[1] = SAA7115_COMPOSITE2;
2493 if (switch_svideo_input) {
2494 /* To handle problems with S-Video Input for
2495 * some devices. Use switch_svideo_input
2496 * parameter when loading the module.*/
2497 mode[2] = SAA7115_COMPOSITE1;
2498 } else {
2499 mode[2] = SAA7115_SVIDEO1;
2500 }
2501 break;
2502 case CODEC_SAA7111:
2503 default:
2504 /* modes for saa7111 */
2505 mode[1] = SAA7115_COMPOSITE1;
2506 mode[2] = SAA7115_SVIDEO1;
2507 break;
2508 }
2509 call_all(usbvision, video, s_routing, mode[channel], 0, 0);
2510 usbvision_set_audio(usbvision, audio[channel]);
2511 return 0;
2512 }
2513
2514 /*
2515 * Overrides for Emacs so that we follow Linus's tabbing style.
2516 * ---------------------------------------------------------------------------
2517 * Local variables:
2518 * c-basic-offset: 8
2519 * End:
2520 */