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
usbvision_rvmalloc(unsigned long size)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
usbvision_rvfree(void * mem,unsigned long size)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
usbvision_hexdump(const unsigned char * data,int len)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 ********************************/
scratch_len(struct usb_usbvision * usbvision)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 */
scratch_free(struct usb_usbvision * usbvision)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 */
scratch_put(struct usb_usbvision * usbvision,unsigned char * data,int len)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 */
scratch_mark_header(struct usb_usbvision * usbvision)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 */
scratch_get_extra(struct usb_usbvision * usbvision,unsigned char * data,int * ptr,int len)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 */
scratch_set_extra_ptr(struct usb_usbvision * usbvision,int * ptr,int len)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 */
scratch_inc_extra_ptr(int * ptr,int len)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 */
scratch_get(struct usb_usbvision * usbvision,unsigned char * data,int len)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 */
scratch_get_header(struct usb_usbvision * usbvision,struct usbvision_frame_header * header)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 */
scratch_rm_old(struct usb_usbvision * usbvision,int len)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 */
scratch_reset(struct usb_usbvision * usbvision)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
usbvision_scratch_alloc(struct usb_usbvision * usbvision)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
usbvision_scratch_free(struct usb_usbvision * usbvision)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 */
usbvision_decompress_alloc(struct usb_usbvision * usbvision)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 */
usbvision_decompress_free(struct usb_usbvision * usbvision)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 */
usbvision_find_header(struct usb_usbvision * usbvision)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
usbvision_parse_lines_422(struct usb_usbvision * usbvision,long * pcopylen)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 */
usbvision_decompress(struct usb_usbvision * usbvision,unsigned char * compressed,unsigned char * decompressed,int * start_pos,int * block_typestart_pos,int len)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, 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 extra_pos = pos;
611 block_len = 0;
612 block_byte = 0;
613 block_code = 0;
614 block_type = 0;
615 block_type_byte = 0;
616 block_type_len = 0;
617 rest_pixel = len;
618
619 for (idx = 0; idx < len; idx++) {
620 if (block_len == 0) {
621 if (block_type_len == 0) {
622 block_type_byte = compressed[block_type_pos];
623 block_type_pos++;
624 block_type_len = 4;
625 }
626 block_type = (block_type_byte & 0xC0) >> 6;
627
628 /* statistic: */
629 usbvision->compr_block_types[block_type]++;
630
631 pos = extra_pos;
632 if (block_type == 0) {
633 if (rest_pixel >= 24) {
634 idx += 23;
635 rest_pixel -= 24;
636 integrator = decompressed[idx];
637 } else {
638 idx += rest_pixel - 1;
639 rest_pixel = 0;
640 }
641 } else {
642 block_code = compressed[pos];
643 pos++;
644 if (rest_pixel >= 24)
645 block_len = 24;
646 else
647 block_len = rest_pixel;
648 rest_pixel -= block_len;
649 extra_pos = pos + (block_len / 4);
650 }
651 block_type_byte <<= 2;
652 block_type_len -= 1;
653 }
654 if (block_len > 0) {
655 if ((block_len % 4) == 0) {
656 block_byte = compressed[pos];
657 pos++;
658 }
659 if (block_type == 1) /* inter Block */
660 integrator = decompressed[idx];
661 switch (block_byte & 0xC0) {
662 case 0x03 << 6:
663 integrator += compressed[extra_pos];
664 extra_pos++;
665 break;
666 case 0x02 << 6:
667 integrator += block_code;
668 break;
669 case 0x00:
670 integrator -= block_code;
671 break;
672 }
673 decompressed[idx] = integrator;
674 block_byte <<= 2;
675 block_len -= 1;
676 }
677 }
678 *start_pos = extra_pos;
679 *block_typestart_pos = block_type_pos;
680 return idx;
681 }
682
683
684 /*
685 * usbvision_parse_compress()
686 *
687 * Parse compressed frame from the scratch buffer, put
688 * decoded RGB value into the current frame buffer and add the written
689 * number of bytes (RGB) to the *pcopylen.
690 *
691 */
usbvision_parse_compress(struct usb_usbvision * usbvision,long * pcopylen)692 static enum parse_state usbvision_parse_compress(struct usb_usbvision *usbvision,
693 long *pcopylen)
694 {
695 #define USBVISION_STRIP_MAGIC 0x5A
696 #define USBVISION_STRIP_LEN_MAX 400
697 #define USBVISION_STRIP_HEADER_LEN 3
698
699 struct usbvision_frame *frame;
700 unsigned char *f, *u = NULL, *v = NULL;
701 unsigned char strip_data[USBVISION_STRIP_LEN_MAX];
702 unsigned char strip_header[USBVISION_STRIP_HEADER_LEN];
703 int idx, idx_end, strip_len, strip_ptr, startblock_pos, block_pos, block_type_pos;
704 int clipmask_index;
705 int image_size;
706 unsigned char rv, gv, bv;
707 static unsigned char *Y, *U, *V;
708
709 frame = usbvision->cur_frame;
710 image_size = frame->frmwidth * frame->frmheight;
711 if ((frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) ||
712 (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420)) { /* this is a planar format */
713 /* ... v4l2_linesize not used here. */
714 f = frame->data + (frame->width * frame->curline);
715 } else
716 f = frame->data + (frame->v4l2_linesize * frame->curline);
717
718 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { /* initialise u and v pointers */
719 /* get base of u and b planes add halfoffset */
720 u = frame->data
721 + image_size
722 + (frame->frmwidth >> 1) * frame->curline;
723 v = u + (image_size >> 1);
724 } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) {
725 v = frame->data + image_size + ((frame->curline * (frame->width)) >> 2);
726 u = v + (image_size >> 2);
727 }
728
729 if (frame->curline == 0)
730 usbvision_adjust_compression(usbvision);
731
732 if (scratch_len(usbvision) < USBVISION_STRIP_HEADER_LEN)
733 return parse_state_out;
734
735 /* get strip header without changing the scratch_read_ptr */
736 scratch_set_extra_ptr(usbvision, &strip_ptr, 0);
737 scratch_get_extra(usbvision, &strip_header[0], &strip_ptr,
738 USBVISION_STRIP_HEADER_LEN);
739
740 if (strip_header[0] != USBVISION_STRIP_MAGIC) {
741 /* wrong strip magic */
742 usbvision->strip_magic_errors++;
743 return parse_state_next_frame;
744 }
745
746 if (frame->curline != (int)strip_header[2]) {
747 /* line number mismatch error */
748 usbvision->strip_line_number_errors++;
749 }
750
751 strip_len = 2 * (unsigned int)strip_header[1];
752 if (strip_len > USBVISION_STRIP_LEN_MAX) {
753 /* strip overrun */
754 /* I think this never happens */
755 usbvision_request_intra(usbvision);
756 }
757
758 if (scratch_len(usbvision) < strip_len) {
759 /* there is not enough data for the strip */
760 return parse_state_out;
761 }
762
763 if (usbvision->intra_frame_buffer) {
764 Y = usbvision->intra_frame_buffer + frame->frmwidth * frame->curline;
765 U = usbvision->intra_frame_buffer + image_size + (frame->frmwidth / 2) * (frame->curline / 2);
766 V = usbvision->intra_frame_buffer + image_size / 4 * 5 + (frame->frmwidth / 2) * (frame->curline / 2);
767 } else {
768 return parse_state_next_frame;
769 }
770
771 clipmask_index = frame->curline * MAX_FRAME_WIDTH;
772
773 scratch_get(usbvision, strip_data, strip_len);
774
775 idx_end = frame->frmwidth;
776 block_type_pos = USBVISION_STRIP_HEADER_LEN;
777 startblock_pos = block_type_pos + (idx_end - 1) / 96 + (idx_end / 2 - 1) / 96 + 2;
778 block_pos = startblock_pos;
779
780 usbvision->block_pos = block_pos;
781
782 usbvision_decompress(usbvision, strip_data, Y, &block_pos, &block_type_pos, idx_end);
783 if (strip_len > usbvision->max_strip_len)
784 usbvision->max_strip_len = strip_len;
785
786 if (frame->curline % 2)
787 usbvision_decompress(usbvision, strip_data, V, &block_pos, &block_type_pos, idx_end / 2);
788 else
789 usbvision_decompress(usbvision, strip_data, U, &block_pos, &block_type_pos, idx_end / 2);
790
791 if (block_pos > usbvision->comprblock_pos)
792 usbvision->comprblock_pos = block_pos;
793 if (block_pos > strip_len)
794 usbvision->strip_len_errors++;
795
796 for (idx = 0; idx < idx_end; idx++) {
797 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
798 *f++ = Y[idx];
799 *f++ = idx & 0x01 ? U[idx / 2] : V[idx / 2];
800 } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) {
801 *f++ = Y[idx];
802 if (idx & 0x01)
803 *u++ = U[idx >> 1];
804 else
805 *v++ = V[idx >> 1];
806 } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) {
807 *f++ = Y[idx];
808 if (!((idx & 0x01) | (frame->curline & 0x01))) {
809 /* only need do this for 1 in 4 pixels */
810 /* intraframe buffer is YUV420 format */
811 *u++ = U[idx >> 1];
812 *v++ = V[idx >> 1];
813 }
814 } else {
815 YUV_TO_RGB_BY_THE_BOOK(Y[idx], U[idx / 2], V[idx / 2], rv, gv, bv);
816 switch (frame->v4l2_format.format) {
817 case V4L2_PIX_FMT_GREY:
818 *f++ = Y[idx];
819 break;
820 case V4L2_PIX_FMT_RGB555:
821 *f++ = (0x1F & rv) |
822 (0xE0 & (gv << 5));
823 *f++ = (0x03 & (gv >> 3)) |
824 (0x7C & (bv << 2));
825 break;
826 case V4L2_PIX_FMT_RGB565:
827 *f++ = (0x1F & rv) |
828 (0xE0 & (gv << 5));
829 *f++ = (0x07 & (gv >> 3)) |
830 (0xF8 & bv);
831 break;
832 case V4L2_PIX_FMT_RGB24:
833 *f++ = rv;
834 *f++ = gv;
835 *f++ = bv;
836 break;
837 case V4L2_PIX_FMT_RGB32:
838 *f++ = rv;
839 *f++ = gv;
840 *f++ = bv;
841 f++;
842 break;
843 }
844 }
845 clipmask_index++;
846 }
847 /* Deal with non-integer no. of bytes for YUV420P */
848 if (frame->v4l2_format.format != V4L2_PIX_FMT_YVU420)
849 *pcopylen += frame->v4l2_linesize;
850 else
851 *pcopylen += frame->curline & 0x01 ? frame->v4l2_linesize : frame->v4l2_linesize << 1;
852
853 frame->curline += 1;
854
855 if (frame->curline >= frame->frmheight)
856 return parse_state_next_frame;
857 return parse_state_continue;
858
859 }
860
861
862 /*
863 * usbvision_parse_lines_420()
864 *
865 * Parse two lines from the scratch buffer, put
866 * decoded RGB value into the current frame buffer and add the written
867 * number of bytes (RGB) to the *pcopylen.
868 *
869 */
usbvision_parse_lines_420(struct usb_usbvision * usbvision,long * pcopylen)870 static enum parse_state usbvision_parse_lines_420(struct usb_usbvision *usbvision,
871 long *pcopylen)
872 {
873 struct usbvision_frame *frame;
874 unsigned char *f_even = NULL, *f_odd = NULL;
875 unsigned int pixel_per_line, block;
876 int pixel, block_split;
877 int y_ptr, u_ptr, v_ptr, y_odd_offset;
878 const int y_block_size = 128;
879 const int uv_block_size = 64;
880 const int sub_block_size = 32;
881 const int y_step[] = { 0, 0, 0, 2 }, y_step_size = 4;
882 const int uv_step[] = { 0, 0, 0, 4 }, uv_step_size = 4;
883 unsigned char y[2], u, v; /* YUV components */
884 int y_, u_, v_, vb, uvg, ur;
885 int r_, g_, b_; /* RGB components */
886 unsigned char g;
887 int clipmask_even_index, clipmask_odd_index, bytes_per_pixel;
888 int clipmask_add, stretch_bytes;
889
890 frame = usbvision->cur_frame;
891 f_even = frame->data + (frame->v4l2_linesize * frame->curline);
892 f_odd = f_even + frame->v4l2_linesize * usbvision->stretch_height;
893
894 /* Make sure there's enough data for the entire line */
895 /* In this mode usbvision transfer 3 bytes for every 2 pixels */
896 /* I need two lines to decode the color */
897 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
898 stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
899 clipmask_even_index = frame->curline * MAX_FRAME_WIDTH;
900 clipmask_odd_index = clipmask_even_index + MAX_FRAME_WIDTH;
901 clipmask_add = usbvision->stretch_width;
902 pixel_per_line = frame->isoc_header.frame_width;
903
904 if (scratch_len(usbvision) < (int)pixel_per_line * 3) {
905 /* printk(KERN_DEBUG "out of data, need %d\n", len); */
906 return parse_state_out;
907 }
908
909 if ((frame->curline + 1) >= frame->frmheight)
910 return parse_state_next_frame;
911
912 block_split = (pixel_per_line%y_block_size) ? 1 : 0; /* are some blocks splitted into different lines? */
913
914 y_odd_offset = (pixel_per_line / y_block_size) * (y_block_size + uv_block_size)
915 + block_split * uv_block_size;
916
917 scratch_set_extra_ptr(usbvision, &y_ptr, y_odd_offset);
918 scratch_set_extra_ptr(usbvision, &u_ptr, y_block_size);
919 scratch_set_extra_ptr(usbvision, &v_ptr, y_odd_offset
920 + (4 - block_split) * sub_block_size);
921
922 for (block = 0; block < (pixel_per_line / sub_block_size); block++) {
923 for (pixel = 0; pixel < sub_block_size; pixel += 2) {
924 scratch_get(usbvision, &y[0], 2);
925 scratch_get_extra(usbvision, &u, &u_ptr, 1);
926 scratch_get_extra(usbvision, &v, &v_ptr, 1);
927
928 /* I don't use the YUV_TO_RGB macro for better performance */
929 v_ = v - 128;
930 u_ = u - 128;
931 vb = 132252 * v_;
932 uvg = -53281 * u_ - 25625 * v_;
933 ur = 104595 * u_;
934
935 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
936 *f_even++ = y[0];
937 *f_even++ = v;
938 } else {
939 y_ = 76284 * (y[0] - 16);
940
941 b_ = (y_ + vb) >> 16;
942 g_ = (y_ + uvg) >> 16;
943 r_ = (y_ + ur) >> 16;
944
945 switch (frame->v4l2_format.format) {
946 case V4L2_PIX_FMT_RGB565:
947 g = LIMIT_RGB(g_);
948 *f_even++ =
949 (0x1F & LIMIT_RGB(r_)) |
950 (0xE0 & (g << 5));
951 *f_even++ =
952 (0x07 & (g >> 3)) |
953 (0xF8 & LIMIT_RGB(b_));
954 break;
955 case V4L2_PIX_FMT_RGB24:
956 *f_even++ = LIMIT_RGB(r_);
957 *f_even++ = LIMIT_RGB(g_);
958 *f_even++ = LIMIT_RGB(b_);
959 break;
960 case V4L2_PIX_FMT_RGB32:
961 *f_even++ = LIMIT_RGB(r_);
962 *f_even++ = LIMIT_RGB(g_);
963 *f_even++ = LIMIT_RGB(b_);
964 f_even++;
965 break;
966 case V4L2_PIX_FMT_RGB555:
967 g = LIMIT_RGB(g_);
968 *f_even++ = (0x1F & LIMIT_RGB(r_)) |
969 (0xE0 & (g << 5));
970 *f_even++ = (0x03 & (g >> 3)) |
971 (0x7C & (LIMIT_RGB(b_) << 2));
972 break;
973 }
974 }
975 clipmask_even_index += clipmask_add;
976 f_even += stretch_bytes;
977
978 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
979 *f_even++ = y[1];
980 *f_even++ = u;
981 } else {
982 y_ = 76284 * (y[1] - 16);
983
984 b_ = (y_ + vb) >> 16;
985 g_ = (y_ + uvg) >> 16;
986 r_ = (y_ + ur) >> 16;
987
988 switch (frame->v4l2_format.format) {
989 case V4L2_PIX_FMT_RGB565:
990 g = LIMIT_RGB(g_);
991 *f_even++ =
992 (0x1F & LIMIT_RGB(r_)) |
993 (0xE0 & (g << 5));
994 *f_even++ =
995 (0x07 & (g >> 3)) |
996 (0xF8 & LIMIT_RGB(b_));
997 break;
998 case V4L2_PIX_FMT_RGB24:
999 *f_even++ = LIMIT_RGB(r_);
1000 *f_even++ = LIMIT_RGB(g_);
1001 *f_even++ = LIMIT_RGB(b_);
1002 break;
1003 case V4L2_PIX_FMT_RGB32:
1004 *f_even++ = LIMIT_RGB(r_);
1005 *f_even++ = LIMIT_RGB(g_);
1006 *f_even++ = LIMIT_RGB(b_);
1007 f_even++;
1008 break;
1009 case V4L2_PIX_FMT_RGB555:
1010 g = LIMIT_RGB(g_);
1011 *f_even++ = (0x1F & LIMIT_RGB(r_)) |
1012 (0xE0 & (g << 5));
1013 *f_even++ = (0x03 & (g >> 3)) |
1014 (0x7C & (LIMIT_RGB(b_) << 2));
1015 break;
1016 }
1017 }
1018 clipmask_even_index += clipmask_add;
1019 f_even += stretch_bytes;
1020
1021 scratch_get_extra(usbvision, &y[0], &y_ptr, 2);
1022
1023 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1024 *f_odd++ = y[0];
1025 *f_odd++ = v;
1026 } else {
1027 y_ = 76284 * (y[0] - 16);
1028
1029 b_ = (y_ + vb) >> 16;
1030 g_ = (y_ + uvg) >> 16;
1031 r_ = (y_ + ur) >> 16;
1032
1033 switch (frame->v4l2_format.format) {
1034 case V4L2_PIX_FMT_RGB565:
1035 g = LIMIT_RGB(g_);
1036 *f_odd++ =
1037 (0x1F & LIMIT_RGB(r_)) |
1038 (0xE0 & (g << 5));
1039 *f_odd++ =
1040 (0x07 & (g >> 3)) |
1041 (0xF8 & LIMIT_RGB(b_));
1042 break;
1043 case V4L2_PIX_FMT_RGB24:
1044 *f_odd++ = LIMIT_RGB(r_);
1045 *f_odd++ = LIMIT_RGB(g_);
1046 *f_odd++ = LIMIT_RGB(b_);
1047 break;
1048 case V4L2_PIX_FMT_RGB32:
1049 *f_odd++ = LIMIT_RGB(r_);
1050 *f_odd++ = LIMIT_RGB(g_);
1051 *f_odd++ = LIMIT_RGB(b_);
1052 f_odd++;
1053 break;
1054 case V4L2_PIX_FMT_RGB555:
1055 g = LIMIT_RGB(g_);
1056 *f_odd++ = (0x1F & LIMIT_RGB(r_)) |
1057 (0xE0 & (g << 5));
1058 *f_odd++ = (0x03 & (g >> 3)) |
1059 (0x7C & (LIMIT_RGB(b_) << 2));
1060 break;
1061 }
1062 }
1063 clipmask_odd_index += clipmask_add;
1064 f_odd += stretch_bytes;
1065
1066 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1067 *f_odd++ = y[1];
1068 *f_odd++ = u;
1069 } else {
1070 y_ = 76284 * (y[1] - 16);
1071
1072 b_ = (y_ + vb) >> 16;
1073 g_ = (y_ + uvg) >> 16;
1074 r_ = (y_ + ur) >> 16;
1075
1076 switch (frame->v4l2_format.format) {
1077 case V4L2_PIX_FMT_RGB565:
1078 g = LIMIT_RGB(g_);
1079 *f_odd++ =
1080 (0x1F & LIMIT_RGB(r_)) |
1081 (0xE0 & (g << 5));
1082 *f_odd++ =
1083 (0x07 & (g >> 3)) |
1084 (0xF8 & LIMIT_RGB(b_));
1085 break;
1086 case V4L2_PIX_FMT_RGB24:
1087 *f_odd++ = LIMIT_RGB(r_);
1088 *f_odd++ = LIMIT_RGB(g_);
1089 *f_odd++ = LIMIT_RGB(b_);
1090 break;
1091 case V4L2_PIX_FMT_RGB32:
1092 *f_odd++ = LIMIT_RGB(r_);
1093 *f_odd++ = LIMIT_RGB(g_);
1094 *f_odd++ = LIMIT_RGB(b_);
1095 f_odd++;
1096 break;
1097 case V4L2_PIX_FMT_RGB555:
1098 g = LIMIT_RGB(g_);
1099 *f_odd++ = (0x1F & LIMIT_RGB(r_)) |
1100 (0xE0 & (g << 5));
1101 *f_odd++ = (0x03 & (g >> 3)) |
1102 (0x7C & (LIMIT_RGB(b_) << 2));
1103 break;
1104 }
1105 }
1106 clipmask_odd_index += clipmask_add;
1107 f_odd += stretch_bytes;
1108 }
1109
1110 scratch_rm_old(usbvision, y_step[block % y_step_size] * sub_block_size);
1111 scratch_inc_extra_ptr(&y_ptr, y_step[(block + 2 * block_split) % y_step_size]
1112 * sub_block_size);
1113 scratch_inc_extra_ptr(&u_ptr, uv_step[block % uv_step_size]
1114 * sub_block_size);
1115 scratch_inc_extra_ptr(&v_ptr, uv_step[(block + 2 * block_split) % uv_step_size]
1116 * sub_block_size);
1117 }
1118
1119 scratch_rm_old(usbvision, pixel_per_line * 3 / 2
1120 + block_split * sub_block_size);
1121
1122 frame->curline += 2 * usbvision->stretch_height;
1123 *pcopylen += frame->v4l2_linesize * 2 * usbvision->stretch_height;
1124
1125 if (frame->curline >= frame->frmheight)
1126 return parse_state_next_frame;
1127 return parse_state_continue;
1128 }
1129
1130 /*
1131 * usbvision_parse_data()
1132 *
1133 * Generic routine to parse the scratch buffer. It employs either
1134 * usbvision_find_header() or usbvision_parse_lines() to do most
1135 * of work.
1136 *
1137 */
usbvision_parse_data(struct usb_usbvision * usbvision)1138 static void usbvision_parse_data(struct usb_usbvision *usbvision)
1139 {
1140 struct usbvision_frame *frame;
1141 enum parse_state newstate;
1142 long copylen = 0;
1143 unsigned long lock_flags;
1144
1145 frame = usbvision->cur_frame;
1146
1147 PDEBUG(DBG_PARSE, "parsing len=%d\n", scratch_len(usbvision));
1148
1149 while (1) {
1150 newstate = parse_state_out;
1151 if (scratch_len(usbvision)) {
1152 if (frame->scanstate == scan_state_scanning) {
1153 newstate = usbvision_find_header(usbvision);
1154 } else if (frame->scanstate == scan_state_lines) {
1155 if (usbvision->isoc_mode == ISOC_MODE_YUV420)
1156 newstate = usbvision_parse_lines_420(usbvision, ©len);
1157 else if (usbvision->isoc_mode == ISOC_MODE_YUV422)
1158 newstate = usbvision_parse_lines_422(usbvision, ©len);
1159 else if (usbvision->isoc_mode == ISOC_MODE_COMPRESS)
1160 newstate = usbvision_parse_compress(usbvision, ©len);
1161 }
1162 }
1163 if (newstate == parse_state_continue)
1164 continue;
1165 if ((newstate == parse_state_next_frame) || (newstate == parse_state_out))
1166 break;
1167 return; /* parse_state_end_parse */
1168 }
1169
1170 if (newstate == parse_state_next_frame) {
1171 frame->grabstate = frame_state_done;
1172 v4l2_get_timestamp(&(frame->timestamp));
1173 frame->sequence = usbvision->frame_num;
1174
1175 spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
1176 list_move_tail(&(frame->frame), &usbvision->outqueue);
1177 usbvision->cur_frame = NULL;
1178 spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
1179
1180 usbvision->frame_num++;
1181
1182 /* This will cause the process to request another frame. */
1183 if (waitqueue_active(&usbvision->wait_frame)) {
1184 PDEBUG(DBG_PARSE, "Wake up !");
1185 wake_up_interruptible(&usbvision->wait_frame);
1186 }
1187 } else {
1188 frame->grabstate = frame_state_grabbing;
1189 }
1190
1191 /* Update the frame's uncompressed length. */
1192 frame->scanlength += copylen;
1193 }
1194
1195
1196 /*
1197 * Make all of the blocks of data contiguous
1198 */
usbvision_compress_isochronous(struct usb_usbvision * usbvision,struct urb * urb)1199 static int usbvision_compress_isochronous(struct usb_usbvision *usbvision,
1200 struct urb *urb)
1201 {
1202 unsigned char *packet_data;
1203 int i, totlen = 0;
1204
1205 for (i = 0; i < urb->number_of_packets; i++) {
1206 int packet_len = urb->iso_frame_desc[i].actual_length;
1207 int packet_stat = urb->iso_frame_desc[i].status;
1208
1209 packet_data = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
1210
1211 /* Detect and ignore errored packets */
1212 if (packet_stat) { /* packet_stat != 0 ????????????? */
1213 PDEBUG(DBG_ISOC, "data error: [%d] len=%d, status=%X", i, packet_len, packet_stat);
1214 usbvision->isoc_err_count++;
1215 continue;
1216 }
1217
1218 /* Detect and ignore empty packets */
1219 if (packet_len < 0) {
1220 PDEBUG(DBG_ISOC, "error packet [%d]", i);
1221 usbvision->isoc_skip_count++;
1222 continue;
1223 } else if (packet_len == 0) { /* Frame end ????? */
1224 PDEBUG(DBG_ISOC, "null packet [%d]", i);
1225 usbvision->isocstate = isoc_state_no_frame;
1226 usbvision->isoc_skip_count++;
1227 continue;
1228 } else if (packet_len > usbvision->isoc_packet_size) {
1229 PDEBUG(DBG_ISOC, "packet[%d] > isoc_packet_size", i);
1230 usbvision->isoc_skip_count++;
1231 continue;
1232 }
1233
1234 PDEBUG(DBG_ISOC, "packet ok [%d] len=%d", i, packet_len);
1235
1236 if (usbvision->isocstate == isoc_state_no_frame) { /* new frame begins */
1237 usbvision->isocstate = isoc_state_in_frame;
1238 scratch_mark_header(usbvision);
1239 usbvision_measure_bandwidth(usbvision);
1240 PDEBUG(DBG_ISOC, "packet with header");
1241 }
1242
1243 /*
1244 * If usbvision continues to feed us with data but there is no
1245 * consumption (if, for example, V4L client fell asleep) we
1246 * may overflow the buffer. We have to move old data over to
1247 * free room for new data. This is bad for old data. If we
1248 * just drop new data then it's bad for new data... choose
1249 * your favorite evil here.
1250 */
1251 if (scratch_free(usbvision) < packet_len) {
1252 usbvision->scratch_ovf_count++;
1253 PDEBUG(DBG_ISOC, "scratch buf overflow! scr_len: %d, n: %d",
1254 scratch_len(usbvision), packet_len);
1255 scratch_rm_old(usbvision, packet_len - scratch_free(usbvision));
1256 }
1257
1258 /* Now we know that there is enough room in scratch buffer */
1259 scratch_put(usbvision, packet_data, packet_len);
1260 totlen += packet_len;
1261 usbvision->isoc_data_count += packet_len;
1262 usbvision->isoc_packet_count++;
1263 }
1264 #if ENABLE_HEXDUMP
1265 if (totlen > 0) {
1266 static int foo;
1267
1268 if (foo < 1) {
1269 printk(KERN_DEBUG "+%d.\n", usbvision->scratchlen);
1270 usbvision_hexdump(data0, (totlen > 64) ? 64 : totlen);
1271 ++foo;
1272 }
1273 }
1274 #endif
1275 return totlen;
1276 }
1277
usbvision_isoc_irq(struct urb * urb)1278 static void usbvision_isoc_irq(struct urb *urb)
1279 {
1280 int err_code = 0;
1281 int len;
1282 struct usb_usbvision *usbvision = urb->context;
1283 int i;
1284 unsigned long start_time = jiffies;
1285 struct usbvision_frame **f;
1286
1287 /* We don't want to do anything if we are about to be removed! */
1288 if (!USBVISION_IS_OPERATIONAL(usbvision))
1289 return;
1290
1291 /* any urb with wrong status is ignored without acknowledgement */
1292 if (urb->status == -ENOENT)
1293 return;
1294
1295 f = &usbvision->cur_frame;
1296
1297 /* Manage streaming interruption */
1298 if (usbvision->streaming == stream_interrupt) {
1299 usbvision->streaming = stream_idle;
1300 if ((*f)) {
1301 (*f)->grabstate = frame_state_ready;
1302 (*f)->scanstate = scan_state_scanning;
1303 }
1304 PDEBUG(DBG_IRQ, "stream interrupted");
1305 wake_up_interruptible(&usbvision->wait_stream);
1306 }
1307
1308 /* Copy the data received into our scratch buffer */
1309 len = usbvision_compress_isochronous(usbvision, urb);
1310
1311 usbvision->isoc_urb_count++;
1312 usbvision->urb_length = len;
1313
1314 if (usbvision->streaming == stream_on) {
1315 /* If we collected enough data let's parse! */
1316 if (scratch_len(usbvision) > USBVISION_HEADER_LENGTH &&
1317 !list_empty(&(usbvision->inqueue))) {
1318 if (!(*f)) {
1319 (*f) = list_entry(usbvision->inqueue.next,
1320 struct usbvision_frame,
1321 frame);
1322 }
1323 usbvision_parse_data(usbvision);
1324 } else {
1325 /* If we don't have a frame
1326 we're current working on, complain */
1327 PDEBUG(DBG_IRQ,
1328 "received data, but no one needs it");
1329 scratch_reset(usbvision);
1330 }
1331 } else {
1332 PDEBUG(DBG_IRQ, "received data, but no one needs it");
1333 scratch_reset(usbvision);
1334 }
1335
1336 usbvision->time_in_irq += jiffies - start_time;
1337
1338 for (i = 0; i < USBVISION_URB_FRAMES; i++) {
1339 urb->iso_frame_desc[i].status = 0;
1340 urb->iso_frame_desc[i].actual_length = 0;
1341 }
1342
1343 urb->status = 0;
1344 urb->dev = usbvision->dev;
1345 err_code = usb_submit_urb(urb, GFP_ATOMIC);
1346
1347 if (err_code) {
1348 dev_err(&usbvision->dev->dev,
1349 "%s: usb_submit_urb failed: error %d\n",
1350 __func__, err_code);
1351 }
1352
1353 return;
1354 }
1355
1356 /*************************************/
1357 /* Low level usbvision access functions */
1358 /*************************************/
1359
1360 /*
1361 * usbvision_read_reg()
1362 *
1363 * return < 0 -> Error
1364 * >= 0 -> Data
1365 */
1366
usbvision_read_reg(struct usb_usbvision * usbvision,unsigned char reg)1367 int usbvision_read_reg(struct usb_usbvision *usbvision, unsigned char reg)
1368 {
1369 int err_code = 0;
1370 unsigned char *buffer = usbvision->ctrl_urb_buffer;
1371
1372 if (!USBVISION_IS_OPERATIONAL(usbvision))
1373 return -1;
1374
1375 err_code = usb_control_msg(usbvision->dev, usb_rcvctrlpipe(usbvision->dev, 1),
1376 USBVISION_OP_CODE,
1377 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1378 0, (__u16) reg, buffer, 1, HZ);
1379
1380 if (err_code < 0) {
1381 dev_err(&usbvision->dev->dev,
1382 "%s: failed: error %d\n", __func__, err_code);
1383 return err_code;
1384 }
1385 return buffer[0];
1386 }
1387
1388 /*
1389 * usbvision_write_reg()
1390 *
1391 * return 1 -> Reg written
1392 * 0 -> usbvision is not yet ready
1393 * -1 -> Something went wrong
1394 */
1395
usbvision_write_reg(struct usb_usbvision * usbvision,unsigned char reg,unsigned char value)1396 int usbvision_write_reg(struct usb_usbvision *usbvision, unsigned char reg,
1397 unsigned char value)
1398 {
1399 int err_code = 0;
1400
1401 if (!USBVISION_IS_OPERATIONAL(usbvision))
1402 return 0;
1403
1404 usbvision->ctrl_urb_buffer[0] = value;
1405 err_code = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1406 USBVISION_OP_CODE,
1407 USB_DIR_OUT | USB_TYPE_VENDOR |
1408 USB_RECIP_ENDPOINT, 0, (__u16) reg,
1409 usbvision->ctrl_urb_buffer, 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
usbvision_ctrl_urb_complete(struct urb * urb)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
usbvision_write_reg_irq(struct usb_usbvision * usbvision,int address,unsigned char * data,int len)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
usbvision_init_compression(struct usb_usbvision * usbvision)1466 static int usbvision_init_compression(struct usb_usbvision *usbvision)
1467 {
1468 usbvision->last_isoc_frame_num = -1;
1469 usbvision->isoc_data_count = 0;
1470 usbvision->isoc_packet_count = 0;
1471 usbvision->isoc_skip_count = 0;
1472 usbvision->compr_level = 50;
1473 usbvision->last_compr_level = -1;
1474 usbvision->isoc_urb_count = 0;
1475 usbvision->request_intra = 1;
1476 usbvision->isoc_measure_bandwidth_count = 0;
1477
1478 return 0;
1479 }
1480
1481 /* this function measures the used bandwidth since last call
1482 * return: 0 : no error
1483 * sets used_bandwidth to 1-100 : 1-100% of full bandwidth resp. to isoc_packet_size
1484 */
usbvision_measure_bandwidth(struct usb_usbvision * usbvision)1485 static int usbvision_measure_bandwidth(struct usb_usbvision *usbvision)
1486 {
1487 if (usbvision->isoc_measure_bandwidth_count < 2) { /* this gives an average bandwidth of 3 frames */
1488 usbvision->isoc_measure_bandwidth_count++;
1489 return 0;
1490 }
1491 if ((usbvision->isoc_packet_size > 0) && (usbvision->isoc_packet_count > 0)) {
1492 usbvision->used_bandwidth = usbvision->isoc_data_count /
1493 (usbvision->isoc_packet_count + usbvision->isoc_skip_count) *
1494 100 / usbvision->isoc_packet_size;
1495 }
1496 usbvision->isoc_measure_bandwidth_count = 0;
1497 usbvision->isoc_data_count = 0;
1498 usbvision->isoc_packet_count = 0;
1499 usbvision->isoc_skip_count = 0;
1500 return 0;
1501 }
1502
usbvision_adjust_compression(struct usb_usbvision * usbvision)1503 static int usbvision_adjust_compression(struct usb_usbvision *usbvision)
1504 {
1505 int err_code = 0;
1506 unsigned char buffer[6];
1507
1508 PDEBUG(DBG_IRQ, "");
1509 if ((adjust_compression) && (usbvision->used_bandwidth > 0)) {
1510 usbvision->compr_level += (usbvision->used_bandwidth - 90) / 2;
1511 RESTRICT_TO_RANGE(usbvision->compr_level, 0, 100);
1512 if (usbvision->compr_level != usbvision->last_compr_level) {
1513 int distortion;
1514
1515 if (usbvision->bridge_type == BRIDGE_NT1004 || usbvision->bridge_type == BRIDGE_NT1005) {
1516 buffer[0] = (unsigned char)(4 + 16 * usbvision->compr_level / 100); /* PCM Threshold 1 */
1517 buffer[1] = (unsigned char)(4 + 8 * usbvision->compr_level / 100); /* PCM Threshold 2 */
1518 distortion = 7 + 248 * usbvision->compr_level / 100;
1519 buffer[2] = (unsigned char)(distortion & 0xFF); /* Average distortion Threshold (inter) */
1520 buffer[3] = (unsigned char)(distortion & 0xFF); /* Average distortion Threshold (intra) */
1521 distortion = 1 + 42 * usbvision->compr_level / 100;
1522 buffer[4] = (unsigned char)(distortion & 0xFF); /* Maximum distortion Threshold (inter) */
1523 buffer[5] = (unsigned char)(distortion & 0xFF); /* Maximum distortion Threshold (intra) */
1524 } else { /* BRIDGE_NT1003 */
1525 buffer[0] = (unsigned char)(4 + 16 * usbvision->compr_level / 100); /* PCM threshold 1 */
1526 buffer[1] = (unsigned char)(4 + 8 * usbvision->compr_level / 100); /* PCM threshold 2 */
1527 distortion = 2 + 253 * usbvision->compr_level / 100;
1528 buffer[2] = (unsigned char)(distortion & 0xFF); /* distortion threshold bit0-7 */
1529 buffer[3] = 0; /* (unsigned char)((distortion >> 8) & 0x0F); distortion threshold bit 8-11 */
1530 distortion = 0 + 43 * usbvision->compr_level / 100;
1531 buffer[4] = (unsigned char)(distortion & 0xFF); /* maximum distortion bit0-7 */
1532 buffer[5] = 0; /* (unsigned char)((distortion >> 8) & 0x01); maximum distortion bit 8 */
1533 }
1534 err_code = usbvision_write_reg_irq(usbvision, USBVISION_PCM_THR1, buffer, 6);
1535 if (err_code == 0) {
1536 PDEBUG(DBG_IRQ, "new compr params %#02x %#02x %#02x %#02x %#02x %#02x", buffer[0],
1537 buffer[1], buffer[2], buffer[3], buffer[4], buffer[5]);
1538 usbvision->last_compr_level = usbvision->compr_level;
1539 }
1540 }
1541 }
1542 return err_code;
1543 }
1544
usbvision_request_intra(struct usb_usbvision * usbvision)1545 static int usbvision_request_intra(struct usb_usbvision *usbvision)
1546 {
1547 unsigned char buffer[1];
1548
1549 PDEBUG(DBG_IRQ, "");
1550 usbvision->request_intra = 1;
1551 buffer[0] = 1;
1552 usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1553 return 0;
1554 }
1555
usbvision_unrequest_intra(struct usb_usbvision * usbvision)1556 static int usbvision_unrequest_intra(struct usb_usbvision *usbvision)
1557 {
1558 unsigned char buffer[1];
1559
1560 PDEBUG(DBG_IRQ, "");
1561 usbvision->request_intra = 0;
1562 buffer[0] = 0;
1563 usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1564 return 0;
1565 }
1566
1567 /*******************************
1568 * usbvision utility functions
1569 *******************************/
1570
usbvision_power_off(struct usb_usbvision * usbvision)1571 int usbvision_power_off(struct usb_usbvision *usbvision)
1572 {
1573 int err_code = 0;
1574
1575 PDEBUG(DBG_FUNC, "");
1576
1577 err_code = usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
1578 if (err_code == 1)
1579 usbvision->power = 0;
1580 PDEBUG(DBG_FUNC, "%s: err_code %d", (err_code != 1) ? "ERROR" : "power is off", err_code);
1581 return err_code;
1582 }
1583
1584 /* configure webcam image sensor using the serial port */
usbvision_init_webcam(struct usb_usbvision * usbvision)1585 static int usbvision_init_webcam(struct usb_usbvision *usbvision)
1586 {
1587 int rc;
1588 int i;
1589 static char init_values[38][3] = {
1590 { 0x04, 0x12, 0x08 }, { 0x05, 0xff, 0xc8 }, { 0x06, 0x18, 0x07 }, { 0x07, 0x90, 0x00 },
1591 { 0x09, 0x00, 0x00 }, { 0x0a, 0x00, 0x00 }, { 0x0b, 0x08, 0x00 }, { 0x0d, 0xcc, 0xcc },
1592 { 0x0e, 0x13, 0x14 }, { 0x10, 0x9b, 0x83 }, { 0x11, 0x5a, 0x3f }, { 0x12, 0xe4, 0x73 },
1593 { 0x13, 0x88, 0x84 }, { 0x14, 0x89, 0x80 }, { 0x15, 0x00, 0x20 }, { 0x16, 0x00, 0x00 },
1594 { 0x17, 0xff, 0xa0 }, { 0x18, 0x6b, 0x20 }, { 0x19, 0x22, 0x40 }, { 0x1a, 0x10, 0x07 },
1595 { 0x1b, 0x00, 0x47 }, { 0x1c, 0x03, 0xe0 }, { 0x1d, 0x00, 0x00 }, { 0x1e, 0x00, 0x00 },
1596 { 0x1f, 0x00, 0x00 }, { 0x20, 0x00, 0x00 }, { 0x21, 0x00, 0x00 }, { 0x22, 0x00, 0x00 },
1597 { 0x23, 0x00, 0x00 }, { 0x24, 0x00, 0x00 }, { 0x25, 0x00, 0x00 }, { 0x26, 0x00, 0x00 },
1598 { 0x27, 0x00, 0x00 }, { 0x28, 0x00, 0x00 }, { 0x29, 0x00, 0x00 }, { 0x08, 0x80, 0x60 },
1599 { 0x0f, 0x2d, 0x24 }, { 0x0c, 0x80, 0x80 }
1600 };
1601 unsigned char *value = usbvision->ctrl_urb_buffer;
1602
1603 /* the only difference between PAL and NTSC init_values */
1604 if (usbvision_device_data[usbvision->dev_model].video_norm == V4L2_STD_NTSC)
1605 init_values[4][1] = 0x34;
1606
1607 for (i = 0; i < sizeof(init_values) / 3; i++) {
1608 usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT);
1609 memcpy(value, init_values[i], 3);
1610 rc = usb_control_msg(usbvision->dev,
1611 usb_sndctrlpipe(usbvision->dev, 1),
1612 USBVISION_OP_CODE,
1613 USB_DIR_OUT | USB_TYPE_VENDOR |
1614 USB_RECIP_ENDPOINT, 0,
1615 (__u16) USBVISION_SER_DAT1, value,
1616 3, HZ);
1617 if (rc < 0)
1618 return rc;
1619 usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SIO);
1620 /* write 3 bytes to the serial port using SIO mode */
1621 usbvision_write_reg(usbvision, USBVISION_SER_CONT, 3 | 0x10);
1622 usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, 0);
1623 usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT);
1624 usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, USBVISION_IO_2);
1625 usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT | USBVISION_CLK_OUT);
1626 usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT | USBVISION_DAT_IO);
1627 usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT | USBVISION_CLK_OUT | USBVISION_DAT_IO);
1628 }
1629
1630 return 0;
1631 }
1632
1633 /*
1634 * usbvision_set_video_format()
1635 *
1636 */
usbvision_set_video_format(struct usb_usbvision * usbvision,int format)1637 static int usbvision_set_video_format(struct usb_usbvision *usbvision, int format)
1638 {
1639 static const char proc[] = "usbvision_set_video_format";
1640 unsigned char *value = usbvision->ctrl_urb_buffer;
1641 int rc;
1642
1643 if (!USBVISION_IS_OPERATIONAL(usbvision))
1644 return 0;
1645
1646 PDEBUG(DBG_FUNC, "isoc_mode %#02x", format);
1647
1648 if ((format != ISOC_MODE_YUV422)
1649 && (format != ISOC_MODE_YUV420)
1650 && (format != ISOC_MODE_COMPRESS)) {
1651 printk(KERN_ERR "usbvision: unknown video format %02x, using default YUV420",
1652 format);
1653 format = ISOC_MODE_YUV420;
1654 }
1655 value[0] = 0x0A; /* TODO: See the effect of the filter */
1656 value[1] = format; /* Sets the VO_MODE register which follows FILT_CONT */
1657 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1658 USBVISION_OP_CODE,
1659 USB_DIR_OUT | USB_TYPE_VENDOR |
1660 USB_RECIP_ENDPOINT, 0,
1661 (__u16) USBVISION_FILT_CONT, value, 2, HZ);
1662
1663 if (rc < 0) {
1664 printk(KERN_ERR "%s: ERROR=%d. USBVISION stopped - "
1665 "reconnect or reload driver.\n", proc, rc);
1666 }
1667 usbvision->isoc_mode = format;
1668 return rc;
1669 }
1670
1671 /*
1672 * usbvision_set_output()
1673 *
1674 */
1675
usbvision_set_output(struct usb_usbvision * usbvision,int width,int height)1676 int usbvision_set_output(struct usb_usbvision *usbvision, int width,
1677 int height)
1678 {
1679 int err_code = 0;
1680 int usb_width, usb_height;
1681 unsigned int frame_rate = 0, frame_drop = 0;
1682 unsigned char *value = usbvision->ctrl_urb_buffer;
1683
1684 if (!USBVISION_IS_OPERATIONAL(usbvision))
1685 return 0;
1686
1687 if (width > MAX_USB_WIDTH) {
1688 usb_width = width / 2;
1689 usbvision->stretch_width = 2;
1690 } else {
1691 usb_width = width;
1692 usbvision->stretch_width = 1;
1693 }
1694
1695 if (height > MAX_USB_HEIGHT) {
1696 usb_height = height / 2;
1697 usbvision->stretch_height = 2;
1698 } else {
1699 usb_height = height;
1700 usbvision->stretch_height = 1;
1701 }
1702
1703 RESTRICT_TO_RANGE(usb_width, MIN_FRAME_WIDTH, MAX_USB_WIDTH);
1704 usb_width &= ~(MIN_FRAME_WIDTH-1);
1705 RESTRICT_TO_RANGE(usb_height, MIN_FRAME_HEIGHT, MAX_USB_HEIGHT);
1706 usb_height &= ~(1);
1707
1708 PDEBUG(DBG_FUNC, "usb %dx%d; screen %dx%d; stretch %dx%d",
1709 usb_width, usb_height, width, height,
1710 usbvision->stretch_width, usbvision->stretch_height);
1711
1712 /* I'll not rewrite the same values */
1713 if ((usb_width != usbvision->curwidth) || (usb_height != usbvision->curheight)) {
1714 value[0] = usb_width & 0xff; /* LSB */
1715 value[1] = (usb_width >> 8) & 0x03; /* MSB */
1716 value[2] = usb_height & 0xff; /* LSB */
1717 value[3] = (usb_height >> 8) & 0x03; /* MSB */
1718
1719 err_code = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1720 USBVISION_OP_CODE,
1721 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1722 0, (__u16) USBVISION_LXSIZE_O, value, 4, HZ);
1723
1724 if (err_code < 0) {
1725 dev_err(&usbvision->dev->dev,
1726 "%s failed: error %d\n", __func__, err_code);
1727 return err_code;
1728 }
1729 usbvision->curwidth = usbvision->stretch_width * usb_width;
1730 usbvision->curheight = usbvision->stretch_height * usb_height;
1731 }
1732
1733 if (usbvision->isoc_mode == ISOC_MODE_YUV422)
1734 frame_rate = (usbvision->isoc_packet_size * 1000) / (usb_width * usb_height * 2);
1735 else if (usbvision->isoc_mode == ISOC_MODE_YUV420)
1736 frame_rate = (usbvision->isoc_packet_size * 1000) / ((usb_width * usb_height * 12) / 8);
1737 else
1738 frame_rate = FRAMERATE_MAX;
1739
1740 if (usbvision->tvnorm_id & V4L2_STD_625_50)
1741 frame_drop = frame_rate * 32 / 25 - 1;
1742 else if (usbvision->tvnorm_id & V4L2_STD_525_60)
1743 frame_drop = frame_rate * 32 / 30 - 1;
1744
1745 RESTRICT_TO_RANGE(frame_drop, FRAMERATE_MIN, FRAMERATE_MAX);
1746
1747 PDEBUG(DBG_FUNC, "frame_rate %d fps, frame_drop %d", frame_rate, frame_drop);
1748
1749 frame_drop = FRAMERATE_MAX; /* We can allow the maximum here, because dropping is controlled */
1750
1751 if (usbvision_device_data[usbvision->dev_model].codec == CODEC_WEBCAM) {
1752 if (usbvision_device_data[usbvision->dev_model].video_norm == V4L2_STD_PAL)
1753 frame_drop = 25;
1754 else
1755 frame_drop = 30;
1756 }
1757
1758 /* frame_drop = 7; => frame_phase = 1, 5, 9, 13, 17, 21, 25, 0, 4, 8, ...
1759 => frame_skip = 4;
1760 => frame_rate = (7 + 1) * 25 / 32 = 200 / 32 = 6.25;
1761
1762 frame_drop = 9; => frame_phase = 1, 5, 8, 11, 14, 17, 21, 24, 27, 1, 4, 8, ...
1763 => frame_skip = 4, 3, 3, 3, 3, 4, 3, 3, 3, 3, 4, ...
1764 => frame_rate = (9 + 1) * 25 / 32 = 250 / 32 = 7.8125;
1765 */
1766 err_code = usbvision_write_reg(usbvision, USBVISION_FRM_RATE, frame_drop);
1767 return err_code;
1768 }
1769
1770
1771 /*
1772 * usbvision_frames_alloc
1773 * allocate the required frames
1774 */
usbvision_frames_alloc(struct usb_usbvision * usbvision,int number_of_frames)1775 int usbvision_frames_alloc(struct usb_usbvision *usbvision, int number_of_frames)
1776 {
1777 int i;
1778
1779 /* needs to be page aligned cause the buffers can be mapped individually! */
1780 usbvision->max_frame_size = PAGE_ALIGN(usbvision->curwidth *
1781 usbvision->curheight *
1782 usbvision->palette.bytes_per_pixel);
1783
1784 /* Try to do my best to allocate the frames the user want in the remaining memory */
1785 usbvision->num_frames = number_of_frames;
1786 while (usbvision->num_frames > 0) {
1787 usbvision->fbuf_size = usbvision->num_frames * usbvision->max_frame_size;
1788 usbvision->fbuf = usbvision_rvmalloc(usbvision->fbuf_size);
1789 if (usbvision->fbuf)
1790 break;
1791 usbvision->num_frames--;
1792 }
1793
1794 /* Allocate all buffers */
1795 for (i = 0; i < usbvision->num_frames; i++) {
1796 usbvision->frame[i].index = i;
1797 usbvision->frame[i].grabstate = frame_state_unused;
1798 usbvision->frame[i].data = usbvision->fbuf +
1799 i * usbvision->max_frame_size;
1800 /*
1801 * Set default sizes for read operation.
1802 */
1803 usbvision->stretch_width = 1;
1804 usbvision->stretch_height = 1;
1805 usbvision->frame[i].width = usbvision->curwidth;
1806 usbvision->frame[i].height = usbvision->curheight;
1807 usbvision->frame[i].bytes_read = 0;
1808 }
1809 PDEBUG(DBG_FUNC, "allocated %d frames (%d bytes per frame)",
1810 usbvision->num_frames, usbvision->max_frame_size);
1811 return usbvision->num_frames;
1812 }
1813
1814 /*
1815 * usbvision_frames_free
1816 * frees memory allocated for the frames
1817 */
usbvision_frames_free(struct usb_usbvision * usbvision)1818 void usbvision_frames_free(struct usb_usbvision *usbvision)
1819 {
1820 /* Have to free all that memory */
1821 PDEBUG(DBG_FUNC, "free %d frames", usbvision->num_frames);
1822
1823 if (usbvision->fbuf != NULL) {
1824 usbvision_rvfree(usbvision->fbuf, usbvision->fbuf_size);
1825 usbvision->fbuf = NULL;
1826
1827 usbvision->num_frames = 0;
1828 }
1829 }
1830 /*
1831 * usbvision_empty_framequeues()
1832 * prepare queues for incoming and outgoing frames
1833 */
usbvision_empty_framequeues(struct usb_usbvision * usbvision)1834 void usbvision_empty_framequeues(struct usb_usbvision *usbvision)
1835 {
1836 u32 i;
1837
1838 INIT_LIST_HEAD(&(usbvision->inqueue));
1839 INIT_LIST_HEAD(&(usbvision->outqueue));
1840
1841 for (i = 0; i < USBVISION_NUMFRAMES; i++) {
1842 usbvision->frame[i].grabstate = frame_state_unused;
1843 usbvision->frame[i].bytes_read = 0;
1844 }
1845 }
1846
1847 /*
1848 * usbvision_stream_interrupt()
1849 * stops streaming
1850 */
usbvision_stream_interrupt(struct usb_usbvision * usbvision)1851 int usbvision_stream_interrupt(struct usb_usbvision *usbvision)
1852 {
1853 int ret = 0;
1854
1855 /* stop reading from the device */
1856
1857 usbvision->streaming = stream_interrupt;
1858 ret = wait_event_timeout(usbvision->wait_stream,
1859 (usbvision->streaming == stream_idle),
1860 msecs_to_jiffies(USBVISION_NUMSBUF*USBVISION_URB_FRAMES));
1861 return ret;
1862 }
1863
1864 /*
1865 * usbvision_set_compress_params()
1866 *
1867 */
1868
usbvision_set_compress_params(struct usb_usbvision * usbvision)1869 static int usbvision_set_compress_params(struct usb_usbvision *usbvision)
1870 {
1871 static const char proc[] = "usbvision_set_compresion_params: ";
1872 int rc;
1873 unsigned char *value = usbvision->ctrl_urb_buffer;
1874
1875 value[0] = 0x0F; /* Intra-Compression cycle */
1876 value[1] = 0x01; /* Reg.45 one line per strip */
1877 value[2] = 0x00; /* Reg.46 Force intra mode on all new frames */
1878 value[3] = 0x00; /* Reg.47 FORCE_UP <- 0 normal operation (not force) */
1879 value[4] = 0xA2; /* Reg.48 BUF_THR I'm not sure if this does something in not compressed mode. */
1880 value[5] = 0x00; /* Reg.49 DVI_YUV This has nothing to do with compression */
1881
1882 /* catched values for NT1004 */
1883 /* value[0] = 0xFF; Never apply intra mode automatically */
1884 /* value[1] = 0xF1; Use full frame height for virtual strip width; One line per strip */
1885 /* value[2] = 0x01; Force intra mode on all new frames */
1886 /* value[3] = 0x00; Strip size 400 Bytes; do not force up */
1887 /* value[4] = 0xA2; */
1888 if (!USBVISION_IS_OPERATIONAL(usbvision))
1889 return 0;
1890
1891 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1892 USBVISION_OP_CODE,
1893 USB_DIR_OUT | USB_TYPE_VENDOR |
1894 USB_RECIP_ENDPOINT, 0,
1895 (__u16) USBVISION_INTRA_CYC, value, 5, HZ);
1896
1897 if (rc < 0) {
1898 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
1899 "reconnect or reload driver.\n", proc, rc);
1900 return rc;
1901 }
1902
1903 if (usbvision->bridge_type == BRIDGE_NT1004) {
1904 value[0] = 20; /* PCM Threshold 1 */
1905 value[1] = 12; /* PCM Threshold 2 */
1906 value[2] = 255; /* Distortion Threshold inter */
1907 value[3] = 255; /* Distortion Threshold intra */
1908 value[4] = 43; /* Max Distortion inter */
1909 value[5] = 43; /* Max Distortion intra */
1910 } else {
1911 value[0] = 20; /* PCM Threshold 1 */
1912 value[1] = 12; /* PCM Threshold 2 */
1913 value[2] = 255; /* Distortion Threshold d7-d0 */
1914 value[3] = 0; /* Distortion Threshold d11-d8 */
1915 value[4] = 43; /* Max Distortion d7-d0 */
1916 value[5] = 0; /* Max Distortion d8 */
1917 }
1918
1919 if (!USBVISION_IS_OPERATIONAL(usbvision))
1920 return 0;
1921
1922 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1923 USBVISION_OP_CODE,
1924 USB_DIR_OUT | USB_TYPE_VENDOR |
1925 USB_RECIP_ENDPOINT, 0,
1926 (__u16) USBVISION_PCM_THR1, value, 6, HZ);
1927
1928 if (rc < 0) {
1929 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
1930 "reconnect or reload driver.\n", proc, rc);
1931 }
1932 return rc;
1933 }
1934
1935
1936 /*
1937 * usbvision_set_input()
1938 *
1939 * Set the input (saa711x, ...) size x y and other misc input params
1940 * I've no idea if this parameters are right
1941 *
1942 */
usbvision_set_input(struct usb_usbvision * usbvision)1943 int usbvision_set_input(struct usb_usbvision *usbvision)
1944 {
1945 static const char proc[] = "usbvision_set_input: ";
1946 int rc;
1947 unsigned char *value = usbvision->ctrl_urb_buffer;
1948 unsigned char dvi_yuv_value;
1949
1950 if (!USBVISION_IS_OPERATIONAL(usbvision))
1951 return 0;
1952
1953 /* Set input format expected from decoder*/
1954 if (usbvision_device_data[usbvision->dev_model].vin_reg1_override) {
1955 value[0] = usbvision_device_data[usbvision->dev_model].vin_reg1;
1956 } else if (usbvision_device_data[usbvision->dev_model].codec == CODEC_SAA7113) {
1957 /* SAA7113 uses 8 bit output */
1958 value[0] = USBVISION_8_422_SYNC;
1959 } else {
1960 /* I'm sure only about d2-d0 [010] 16 bit 4:2:2 usin sync pulses
1961 * as that is how saa7111 is configured */
1962 value[0] = USBVISION_16_422_SYNC;
1963 /* | USBVISION_VSNC_POL | USBVISION_VCLK_POL);*/
1964 }
1965
1966 rc = usbvision_write_reg(usbvision, USBVISION_VIN_REG1, value[0]);
1967 if (rc < 0) {
1968 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
1969 "reconnect or reload driver.\n", proc, rc);
1970 return rc;
1971 }
1972
1973
1974 if (usbvision->tvnorm_id & V4L2_STD_PAL) {
1975 value[0] = 0xC0;
1976 value[1] = 0x02; /* 0x02C0 -> 704 Input video line length */
1977 value[2] = 0x20;
1978 value[3] = 0x01; /* 0x0120 -> 288 Input video n. of lines */
1979 value[4] = 0x60;
1980 value[5] = 0x00; /* 0x0060 -> 96 Input video h offset */
1981 value[6] = 0x16;
1982 value[7] = 0x00; /* 0x0016 -> 22 Input video v offset */
1983 } else if (usbvision->tvnorm_id & V4L2_STD_SECAM) {
1984 value[0] = 0xC0;
1985 value[1] = 0x02; /* 0x02C0 -> 704 Input video line length */
1986 value[2] = 0x20;
1987 value[3] = 0x01; /* 0x0120 -> 288 Input video n. of lines */
1988 value[4] = 0x01;
1989 value[5] = 0x00; /* 0x0001 -> 01 Input video h offset */
1990 value[6] = 0x01;
1991 value[7] = 0x00; /* 0x0001 -> 01 Input video v offset */
1992 } else { /* V4L2_STD_NTSC */
1993 value[0] = 0xD0;
1994 value[1] = 0x02; /* 0x02D0 -> 720 Input video line length */
1995 value[2] = 0xF0;
1996 value[3] = 0x00; /* 0x00F0 -> 240 Input video number of lines */
1997 value[4] = 0x50;
1998 value[5] = 0x00; /* 0x0050 -> 80 Input video h offset */
1999 value[6] = 0x10;
2000 value[7] = 0x00; /* 0x0010 -> 16 Input video v offset */
2001 }
2002
2003 /* webcam is only 480 pixels wide, both PAL and NTSC version */
2004 if (usbvision_device_data[usbvision->dev_model].codec == CODEC_WEBCAM) {
2005 value[0] = 0xe0;
2006 value[1] = 0x01; /* 0x01E0 -> 480 Input video line length */
2007 }
2008
2009 if (usbvision_device_data[usbvision->dev_model].x_offset >= 0) {
2010 value[4] = usbvision_device_data[usbvision->dev_model].x_offset & 0xff;
2011 value[5] = (usbvision_device_data[usbvision->dev_model].x_offset & 0x0300) >> 8;
2012 }
2013
2014 if (adjust_x_offset != -1) {
2015 value[4] = adjust_x_offset & 0xff;
2016 value[5] = (adjust_x_offset & 0x0300) >> 8;
2017 }
2018
2019 if (usbvision_device_data[usbvision->dev_model].y_offset >= 0) {
2020 value[6] = usbvision_device_data[usbvision->dev_model].y_offset & 0xff;
2021 value[7] = (usbvision_device_data[usbvision->dev_model].y_offset & 0x0300) >> 8;
2022 }
2023
2024 if (adjust_y_offset != -1) {
2025 value[6] = adjust_y_offset & 0xff;
2026 value[7] = (adjust_y_offset & 0x0300) >> 8;
2027 }
2028
2029 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2030 USBVISION_OP_CODE, /* USBVISION specific code */
2031 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0,
2032 (__u16) USBVISION_LXSIZE_I, value, 8, HZ);
2033 if (rc < 0) {
2034 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2035 "reconnect or reload driver.\n", proc, rc);
2036 return rc;
2037 }
2038
2039
2040 dvi_yuv_value = 0x00; /* U comes after V, Ya comes after U/V, Yb comes after Yb */
2041
2042 if (usbvision_device_data[usbvision->dev_model].dvi_yuv_override) {
2043 dvi_yuv_value = usbvision_device_data[usbvision->dev_model].dvi_yuv;
2044 } else if (usbvision_device_data[usbvision->dev_model].codec == CODEC_SAA7113) {
2045 /* This changes as the fine sync control changes. Further investigation necessary */
2046 dvi_yuv_value = 0x06;
2047 }
2048
2049 return usbvision_write_reg(usbvision, USBVISION_DVI_YUV, dvi_yuv_value);
2050 }
2051
2052
2053 /*
2054 * usbvision_set_dram_settings()
2055 *
2056 * Set the buffer address needed by the usbvision dram to operate
2057 * This values has been taken with usbsnoop.
2058 *
2059 */
2060
usbvision_set_dram_settings(struct usb_usbvision * usbvision)2061 static int usbvision_set_dram_settings(struct usb_usbvision *usbvision)
2062 {
2063 unsigned char *value = usbvision->ctrl_urb_buffer;
2064 int rc;
2065
2066 if (usbvision->isoc_mode == ISOC_MODE_COMPRESS) {
2067 value[0] = 0x42;
2068 value[1] = 0x71;
2069 value[2] = 0xff;
2070 value[3] = 0x00;
2071 value[4] = 0x98;
2072 value[5] = 0xe0;
2073 value[6] = 0x71;
2074 value[7] = 0xff;
2075 /* UR: 0x0E200-0x3FFFF = 204288 Words (1 Word = 2 Byte) */
2076 /* FDL: 0x00000-0x0E099 = 57498 Words */
2077 /* VDW: 0x0E3FF-0x3FFFF */
2078 } else {
2079 value[0] = 0x42;
2080 value[1] = 0x00;
2081 value[2] = 0xff;
2082 value[3] = 0x00;
2083 value[4] = 0x00;
2084 value[5] = 0x00;
2085 value[6] = 0x00;
2086 value[7] = 0xff;
2087 }
2088 /* These are the values of the address of the video buffer,
2089 * they have to be loaded into the USBVISION_DRM_PRM1-8
2090 *
2091 * Start address of video output buffer for read: drm_prm1-2 -> 0x00000
2092 * End address of video output buffer for read: drm_prm1-3 -> 0x1ffff
2093 * Start address of video frame delay buffer: drm_prm1-4 -> 0x20000
2094 * Only used in compressed mode
2095 * End address of video frame delay buffer: drm_prm1-5-6 -> 0x3ffff
2096 * Only used in compressed mode
2097 * Start address of video output buffer for write: drm_prm1-7 -> 0x00000
2098 * End address of video output buffer for write: drm_prm1-8 -> 0x1ffff
2099 */
2100
2101 if (!USBVISION_IS_OPERATIONAL(usbvision))
2102 return 0;
2103
2104 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2105 USBVISION_OP_CODE, /* USBVISION specific code */
2106 USB_DIR_OUT | USB_TYPE_VENDOR |
2107 USB_RECIP_ENDPOINT, 0,
2108 (__u16) USBVISION_DRM_PRM1, value, 8, HZ);
2109
2110 if (rc < 0) {
2111 dev_err(&usbvision->dev->dev, "%s: ERROR=%d\n", __func__, rc);
2112 return rc;
2113 }
2114
2115 /* Restart the video buffer logic */
2116 rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, USBVISION_RES_UR |
2117 USBVISION_RES_FDL | USBVISION_RES_VDW);
2118 if (rc < 0)
2119 return rc;
2120 rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, 0x00);
2121
2122 return rc;
2123 }
2124
2125 /*
2126 * ()
2127 *
2128 * Power on the device, enables suspend-resume logic
2129 * & reset the isoc End-Point
2130 *
2131 */
2132
usbvision_power_on(struct usb_usbvision * usbvision)2133 int usbvision_power_on(struct usb_usbvision *usbvision)
2134 {
2135 int err_code = 0;
2136
2137 PDEBUG(DBG_FUNC, "");
2138
2139 usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
2140 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2141 USBVISION_SSPND_EN | USBVISION_RES2);
2142
2143 if (usbvision_device_data[usbvision->dev_model].codec == CODEC_WEBCAM) {
2144 usbvision_write_reg(usbvision, USBVISION_VIN_REG1,
2145 USBVISION_16_422_SYNC | USBVISION_HVALID_PO);
2146 usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
2147 USBVISION_NOHVALID | USBVISION_KEEP_BLANK);
2148 }
2149 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2150 USBVISION_SSPND_EN | USBVISION_PWR_VID);
2151 mdelay(10);
2152 err_code = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2153 USBVISION_SSPND_EN | USBVISION_PWR_VID | USBVISION_RES2);
2154 if (err_code == 1)
2155 usbvision->power = 1;
2156 PDEBUG(DBG_FUNC, "%s: err_code %d", (err_code < 0) ? "ERROR" : "power is on", err_code);
2157 return err_code;
2158 }
2159
2160
2161 /*
2162 * usbvision_begin_streaming()
2163 * Sure you have to put bit 7 to 0, if not incoming frames are droped, but no
2164 * idea about the rest
2165 */
usbvision_begin_streaming(struct usb_usbvision * usbvision)2166 int usbvision_begin_streaming(struct usb_usbvision *usbvision)
2167 {
2168 if (usbvision->isoc_mode == ISOC_MODE_COMPRESS)
2169 usbvision_init_compression(usbvision);
2170 return usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
2171 USBVISION_NOHVALID | usbvision->vin_reg2_preset);
2172 }
2173
2174 /*
2175 * usbvision_restart_isoc()
2176 * Not sure yet if touching here PWR_REG make loose the config
2177 */
2178
usbvision_restart_isoc(struct usb_usbvision * usbvision)2179 int usbvision_restart_isoc(struct usb_usbvision *usbvision)
2180 {
2181 int ret;
2182
2183 ret = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2184 USBVISION_SSPND_EN | USBVISION_PWR_VID);
2185 if (ret < 0)
2186 return ret;
2187 ret = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2188 USBVISION_SSPND_EN | USBVISION_PWR_VID |
2189 USBVISION_RES2);
2190 if (ret < 0)
2191 return ret;
2192 ret = usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
2193 USBVISION_KEEP_BLANK | USBVISION_NOHVALID |
2194 usbvision->vin_reg2_preset);
2195 if (ret < 0)
2196 return ret;
2197
2198 /* TODO: schedule timeout */
2199 while ((usbvision_read_reg(usbvision, USBVISION_STATUS_REG) & 0x01) != 1)
2200 ;
2201
2202 return 0;
2203 }
2204
usbvision_audio_off(struct usb_usbvision * usbvision)2205 int usbvision_audio_off(struct usb_usbvision *usbvision)
2206 {
2207 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, USBVISION_AUDIO_MUTE) < 0) {
2208 printk(KERN_ERR "usbvision_audio_off: can't write reg\n");
2209 return -1;
2210 }
2211 usbvision->audio_mute = 0;
2212 usbvision->audio_channel = USBVISION_AUDIO_MUTE;
2213 return 0;
2214 }
2215
usbvision_set_audio(struct usb_usbvision * usbvision,int audio_channel)2216 int usbvision_set_audio(struct usb_usbvision *usbvision, int audio_channel)
2217 {
2218 if (!usbvision->audio_mute) {
2219 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, audio_channel) < 0) {
2220 printk(KERN_ERR "usbvision_set_audio: can't write iopin register for audio switching\n");
2221 return -1;
2222 }
2223 }
2224 usbvision->audio_channel = audio_channel;
2225 return 0;
2226 }
2227
usbvision_setup(struct usb_usbvision * usbvision,int format)2228 int usbvision_setup(struct usb_usbvision *usbvision, int format)
2229 {
2230 if (usbvision_device_data[usbvision->dev_model].codec == CODEC_WEBCAM)
2231 usbvision_init_webcam(usbvision);
2232 usbvision_set_video_format(usbvision, format);
2233 usbvision_set_dram_settings(usbvision);
2234 usbvision_set_compress_params(usbvision);
2235 usbvision_set_input(usbvision);
2236 usbvision_set_output(usbvision, MAX_USB_WIDTH, MAX_USB_HEIGHT);
2237 usbvision_restart_isoc(usbvision);
2238
2239 /* cosas del PCM */
2240 return USBVISION_IS_OPERATIONAL(usbvision);
2241 }
2242
usbvision_set_alternate(struct usb_usbvision * dev)2243 int usbvision_set_alternate(struct usb_usbvision *dev)
2244 {
2245 int err_code, prev_alt = dev->iface_alt;
2246 int i;
2247
2248 dev->iface_alt = 0;
2249 for (i = 0; i < dev->num_alt; i++)
2250 if (dev->alt_max_pkt_size[i] > dev->alt_max_pkt_size[dev->iface_alt])
2251 dev->iface_alt = i;
2252
2253 if (dev->iface_alt != prev_alt) {
2254 dev->isoc_packet_size = dev->alt_max_pkt_size[dev->iface_alt];
2255 PDEBUG(DBG_FUNC, "setting alternate %d with max_packet_size=%u",
2256 dev->iface_alt, dev->isoc_packet_size);
2257 err_code = usb_set_interface(dev->dev, dev->iface, dev->iface_alt);
2258 if (err_code < 0) {
2259 dev_err(&dev->dev->dev,
2260 "cannot change alternate number to %d (error=%i)\n",
2261 dev->iface_alt, err_code);
2262 return err_code;
2263 }
2264 }
2265
2266 PDEBUG(DBG_ISOC, "ISO Packet Length:%d", dev->isoc_packet_size);
2267
2268 return 0;
2269 }
2270
2271 /*
2272 * usbvision_init_isoc()
2273 *
2274 */
usbvision_init_isoc(struct usb_usbvision * usbvision)2275 int usbvision_init_isoc(struct usb_usbvision *usbvision)
2276 {
2277 struct usb_device *dev = usbvision->dev;
2278 int buf_idx, err_code, reg_value;
2279 int sb_size;
2280
2281 if (!USBVISION_IS_OPERATIONAL(usbvision))
2282 return -EFAULT;
2283
2284 usbvision->cur_frame = NULL;
2285 scratch_reset(usbvision);
2286
2287 /* Alternate interface 1 is is the biggest frame size */
2288 err_code = usbvision_set_alternate(usbvision);
2289 if (err_code < 0) {
2290 usbvision->last_error = err_code;
2291 return -EBUSY;
2292 }
2293 sb_size = USBVISION_URB_FRAMES * usbvision->isoc_packet_size;
2294
2295 reg_value = (16 - usbvision_read_reg(usbvision,
2296 USBVISION_ALTER_REG)) & 0x0F;
2297
2298 usbvision->usb_bandwidth = reg_value >> 1;
2299 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec",
2300 usbvision->usb_bandwidth);
2301
2302
2303
2304 /* We double buffer the Iso lists */
2305
2306 for (buf_idx = 0; buf_idx < USBVISION_NUMSBUF; buf_idx++) {
2307 int j, k;
2308 struct urb *urb;
2309
2310 urb = usb_alloc_urb(USBVISION_URB_FRAMES, GFP_KERNEL);
2311 if (urb == NULL) {
2312 dev_err(&usbvision->dev->dev,
2313 "%s: usb_alloc_urb() failed\n", __func__);
2314 return -ENOMEM;
2315 }
2316 usbvision->sbuf[buf_idx].urb = urb;
2317 usbvision->sbuf[buf_idx].data =
2318 usb_alloc_coherent(usbvision->dev,
2319 sb_size,
2320 GFP_KERNEL,
2321 &urb->transfer_dma);
2322 urb->dev = dev;
2323 urb->context = usbvision;
2324 urb->pipe = usb_rcvisocpipe(dev, usbvision->video_endp);
2325 urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
2326 urb->interval = 1;
2327 urb->transfer_buffer = usbvision->sbuf[buf_idx].data;
2328 urb->complete = usbvision_isoc_irq;
2329 urb->number_of_packets = USBVISION_URB_FRAMES;
2330 urb->transfer_buffer_length =
2331 usbvision->isoc_packet_size * USBVISION_URB_FRAMES;
2332 for (j = k = 0; j < USBVISION_URB_FRAMES; j++,
2333 k += usbvision->isoc_packet_size) {
2334 urb->iso_frame_desc[j].offset = k;
2335 urb->iso_frame_desc[j].length =
2336 usbvision->isoc_packet_size;
2337 }
2338 }
2339
2340 /* Submit all URBs */
2341 for (buf_idx = 0; buf_idx < USBVISION_NUMSBUF; buf_idx++) {
2342 err_code = usb_submit_urb(usbvision->sbuf[buf_idx].urb,
2343 GFP_KERNEL);
2344 if (err_code) {
2345 dev_err(&usbvision->dev->dev,
2346 "%s: usb_submit_urb(%d) failed: error %d\n",
2347 __func__, buf_idx, err_code);
2348 }
2349 }
2350
2351 usbvision->streaming = stream_idle;
2352 PDEBUG(DBG_ISOC, "%s: streaming=1 usbvision->video_endp=$%02x",
2353 __func__,
2354 usbvision->video_endp);
2355 return 0;
2356 }
2357
2358 /*
2359 * usbvision_stop_isoc()
2360 *
2361 * This procedure stops streaming and deallocates URBs. Then it
2362 * activates zero-bandwidth alt. setting of the video interface.
2363 *
2364 */
usbvision_stop_isoc(struct usb_usbvision * usbvision)2365 void usbvision_stop_isoc(struct usb_usbvision *usbvision)
2366 {
2367 int buf_idx, err_code, reg_value;
2368 int sb_size = USBVISION_URB_FRAMES * usbvision->isoc_packet_size;
2369
2370 if ((usbvision->streaming == stream_off) || (usbvision->dev == NULL))
2371 return;
2372
2373 /* Unschedule all of the iso td's */
2374 for (buf_idx = 0; buf_idx < USBVISION_NUMSBUF; buf_idx++) {
2375 usb_kill_urb(usbvision->sbuf[buf_idx].urb);
2376 if (usbvision->sbuf[buf_idx].data) {
2377 usb_free_coherent(usbvision->dev,
2378 sb_size,
2379 usbvision->sbuf[buf_idx].data,
2380 usbvision->sbuf[buf_idx].urb->transfer_dma);
2381 }
2382 usb_free_urb(usbvision->sbuf[buf_idx].urb);
2383 usbvision->sbuf[buf_idx].urb = NULL;
2384 }
2385
2386 PDEBUG(DBG_ISOC, "%s: streaming=stream_off\n", __func__);
2387 usbvision->streaming = stream_off;
2388
2389 if (!usbvision->remove_pending) {
2390 /* Set packet size to 0 */
2391 usbvision->iface_alt = 0;
2392 err_code = usb_set_interface(usbvision->dev, usbvision->iface,
2393 usbvision->iface_alt);
2394 if (err_code < 0) {
2395 dev_err(&usbvision->dev->dev,
2396 "%s: usb_set_interface() failed: error %d\n",
2397 __func__, err_code);
2398 usbvision->last_error = err_code;
2399 }
2400 reg_value = (16-usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F;
2401 usbvision->isoc_packet_size =
2402 (reg_value == 0) ? 0 : (reg_value * 64) - 1;
2403 PDEBUG(DBG_ISOC, "ISO Packet Length:%d",
2404 usbvision->isoc_packet_size);
2405
2406 usbvision->usb_bandwidth = reg_value >> 1;
2407 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec",
2408 usbvision->usb_bandwidth);
2409 }
2410 }
2411
usbvision_muxsel(struct usb_usbvision * usbvision,int channel)2412 int usbvision_muxsel(struct usb_usbvision *usbvision, int channel)
2413 {
2414 /* inputs #0 and #3 are constant for every SAA711x. */
2415 /* inputs #1 and #2 are variable for SAA7111 and SAA7113 */
2416 int mode[4] = { SAA7115_COMPOSITE0, 0, 0, SAA7115_COMPOSITE3 };
2417 int audio[] = { 1, 0, 0, 0 };
2418 /* channel 0 is TV with audiochannel 1 (tuner mono) */
2419 /* channel 1 is Composite with audio channel 0 (line in) */
2420 /* channel 2 is S-Video with audio channel 0 (line in) */
2421 /* channel 3 is additional video inputs to the device with audio channel 0 (line in) */
2422
2423 RESTRICT_TO_RANGE(channel, 0, usbvision->video_inputs);
2424 usbvision->ctl_input = channel;
2425
2426 /* set the new channel */
2427 /* Regular USB TV Tuners -> channel: 0 = Television, 1 = Composite, 2 = S-Video */
2428 /* Four video input devices -> channel: 0 = Chan White, 1 = Chan Green, 2 = Chan Yellow, 3 = Chan Red */
2429
2430 switch (usbvision_device_data[usbvision->dev_model].codec) {
2431 case CODEC_SAA7113:
2432 mode[1] = SAA7115_COMPOSITE2;
2433 if (switch_svideo_input) {
2434 /* To handle problems with S-Video Input for
2435 * some devices. Use switch_svideo_input
2436 * parameter when loading the module.*/
2437 mode[2] = SAA7115_COMPOSITE1;
2438 } else {
2439 mode[2] = SAA7115_SVIDEO1;
2440 }
2441 break;
2442 case CODEC_SAA7111:
2443 default:
2444 /* modes for saa7111 */
2445 mode[1] = SAA7115_COMPOSITE1;
2446 mode[2] = SAA7115_SVIDEO1;
2447 break;
2448 }
2449 call_all(usbvision, video, s_routing, mode[channel], 0, 0);
2450 usbvision_set_audio(usbvision, audio[channel]);
2451 return 0;
2452 }
2453