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Merge branch 'firewire-kernel-streaming' of git://git.alsa-project.org/alsa-kprivate
[firewire-audio.git] / drivers / media / video / usbvision / usbvision-core.c
blobc8feb0d6fccf5148770d71b52d120017e43ea7eb
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 unsigned int force_testpattern;
53 module_param(force_testpattern, int, 0644);
54 MODULE_PARM_DESC(force_testpattern, "enable test pattern display [core]");
55
56 static int adjust_compression = 1; /* Set the compression to be adaptive */
57 module_param(adjust_compression, int, 0444);
58 MODULE_PARM_DESC(adjust_compression, " Set the ADPCM compression for the device. Default: 1 (On)");
59
60 /* To help people with Black and White output with using s-video input.
61 * Some cables and input device are wired differently. */
62 static int switch_svideo_input;
63 module_param(switch_svideo_input, int, 0444);
64 MODULE_PARM_DESC(switch_svideo_input, " Set the S-Video input. Some cables and input device are wired differently. Default: 0 (Off)");
65
66 static unsigned int adjust_x_offset = -1;
67 module_param(adjust_x_offset, int, 0644);
68 MODULE_PARM_DESC(adjust_x_offset, "adjust X offset display [core]");
69
70 static unsigned int adjust_y_offset = -1;
71 module_param(adjust_y_offset, int, 0644);
72 MODULE_PARM_DESC(adjust_y_offset, "adjust Y offset display [core]");
73
74
75 #define ENABLE_HEXDUMP 0 /* Enable if you need it */
76
77
78 #ifdef USBVISION_DEBUG
79 #define PDEBUG(level, fmt, args...) { \
80 if (core_debug & (level)) \
81 printk(KERN_INFO KBUILD_MODNAME ":[%s:%d] " fmt, \
82 __func__, __LINE__ , ## args); \
83 }
84 #else
85 #define PDEBUG(level, fmt, args...) do {} while (0)
86 #endif
87
88 #define DBG_HEADER (1 << 0)
89 #define DBG_IRQ (1 << 1)
90 #define DBG_ISOC (1 << 2)
91 #define DBG_PARSE (1 << 3)
92 #define DBG_SCRATCH (1 << 4)
93 #define DBG_FUNC (1 << 5)
94
95 static const int max_imgwidth = MAX_FRAME_WIDTH;
96 static const int max_imgheight = MAX_FRAME_HEIGHT;
97 static const int min_imgwidth = MIN_FRAME_WIDTH;
98 static const int min_imgheight = MIN_FRAME_HEIGHT;
99
100 /* The value of 'scratch_buf_size' affects quality of the picture
101 * in many ways. Shorter buffers may cause loss of data when client
102 * is too slow. Larger buffers are memory-consuming and take longer
103 * to work with. This setting can be adjusted, but the default value
104 * should be OK for most desktop users.
105 */
106 #define DEFAULT_SCRATCH_BUF_SIZE (0x20000) /* 128kB memory scratch buffer */
107 static const int scratch_buf_size = DEFAULT_SCRATCH_BUF_SIZE;
108
109 /* Function prototypes */
110 static int usbvision_request_intra(struct usb_usbvision *usbvision);
111 static int usbvision_unrequest_intra(struct usb_usbvision *usbvision);
112 static int usbvision_adjust_compression(struct usb_usbvision *usbvision);
113 static int usbvision_measure_bandwidth(struct usb_usbvision *usbvision);
114
115 /*******************************/
116 /* Memory management functions */
117 /*******************************/
118
119 /*
120 * Here we want the physical address of the memory.
121 * This is used when initializing the contents of the area.
122 */
123
124 static void *usbvision_rvmalloc(unsigned long size)
125 {
126 void *mem;
127 unsigned long adr;
128
129 size = PAGE_ALIGN(size);
130 mem = vmalloc_32(size);
131 if (!mem)
132 return NULL;
133
134 memset(mem, 0, size); /* Clear the ram out, no junk to the user */
135 adr = (unsigned long) mem;
136 while (size > 0) {
137 SetPageReserved(vmalloc_to_page((void *)adr));
138 adr += PAGE_SIZE;
139 size -= PAGE_SIZE;
140 }
141
142 return mem;
143 }
144
145 static void usbvision_rvfree(void *mem, unsigned long size)
146 {
147 unsigned long adr;
148
149 if (!mem)
150 return;
151
152 size = PAGE_ALIGN(size);
153
154 adr = (unsigned long) mem;
155 while ((long) size > 0) {
156 ClearPageReserved(vmalloc_to_page((void *)adr));
157 adr += PAGE_SIZE;
158 size -= PAGE_SIZE;
159 }
160
161 vfree(mem);
162 }
163
164
165 #if ENABLE_HEXDUMP
166 static void usbvision_hexdump(const unsigned char *data, int len)
167 {
168 char tmp[80];
169 int i, k;
170
171 for (i = k = 0; len > 0; i++, len--) {
172 if (i > 0 && (i % 16 == 0)) {
173 printk("%s\n", tmp);
174 k = 0;
175 }
176 k += sprintf(&tmp[k], "%02x ", data[i]);
177 }
178 if (k > 0)
179 printk(KERN_CONT "%s\n", tmp);
180 }
181 #endif
182
183 /********************************
184 * scratch ring buffer handling
185 ********************************/
186 static int scratch_len(struct usb_usbvision *usbvision) /* This returns the amount of data actually in the buffer */
187 {
188 int len = usbvision->scratch_write_ptr - usbvision->scratch_read_ptr;
189
190 if (len < 0)
191 len += scratch_buf_size;
192 PDEBUG(DBG_SCRATCH, "scratch_len() = %d\n", len);
193
194 return len;
195 }
196
197
198 /* This returns the free space left in the buffer */
199 static int scratch_free(struct usb_usbvision *usbvision)
200 {
201 int free = usbvision->scratch_read_ptr - usbvision->scratch_write_ptr;
202 if (free <= 0)
203 free += scratch_buf_size;
204 if (free) {
205 free -= 1; /* at least one byte in the buffer must */
206 /* left blank, otherwise there is no chance to differ between full and empty */
207 }
208 PDEBUG(DBG_SCRATCH, "return %d\n", free);
209
210 return free;
211 }
212
213
214 /* This puts data into the buffer */
215 static int scratch_put(struct usb_usbvision *usbvision, unsigned char *data,
216 int len)
217 {
218 int len_part;
219
220 if (usbvision->scratch_write_ptr + len < scratch_buf_size) {
221 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len);
222 usbvision->scratch_write_ptr += len;
223 } else {
224 len_part = scratch_buf_size - usbvision->scratch_write_ptr;
225 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len_part);
226 if (len == len_part) {
227 usbvision->scratch_write_ptr = 0; /* just set write_ptr to zero */
228 } else {
229 memcpy(usbvision->scratch, data + len_part, len - len_part);
230 usbvision->scratch_write_ptr = len - len_part;
231 }
232 }
233
234 PDEBUG(DBG_SCRATCH, "len=%d, new write_ptr=%d\n", len, usbvision->scratch_write_ptr);
235
236 return len;
237 }
238
239 /* This marks the write_ptr as position of new frame header */
240 static void scratch_mark_header(struct usb_usbvision *usbvision)
241 {
242 PDEBUG(DBG_SCRATCH, "header at write_ptr=%d\n", usbvision->scratch_headermarker_write_ptr);
243
244 usbvision->scratch_headermarker[usbvision->scratch_headermarker_write_ptr] =
245 usbvision->scratch_write_ptr;
246 usbvision->scratch_headermarker_write_ptr += 1;
247 usbvision->scratch_headermarker_write_ptr %= USBVISION_NUM_HEADERMARKER;
248 }
249
250 /* This gets data from the buffer at the given "ptr" position */
251 static int scratch_get_extra(struct usb_usbvision *usbvision,
252 unsigned char *data, int *ptr, int len)
253 {
254 int len_part;
255
256 if (*ptr + len < scratch_buf_size) {
257 memcpy(data, usbvision->scratch + *ptr, len);
258 *ptr += len;
259 } else {
260 len_part = scratch_buf_size - *ptr;
261 memcpy(data, usbvision->scratch + *ptr, len_part);
262 if (len == len_part) {
263 *ptr = 0; /* just set the y_ptr to zero */
264 } else {
265 memcpy(data + len_part, usbvision->scratch, len - len_part);
266 *ptr = len - len_part;
267 }
268 }
269
270 PDEBUG(DBG_SCRATCH, "len=%d, new ptr=%d\n", len, *ptr);
271
272 return len;
273 }
274
275
276 /* This sets the scratch extra read pointer */
277 static void scratch_set_extra_ptr(struct usb_usbvision *usbvision, int *ptr,
278 int len)
279 {
280 *ptr = (usbvision->scratch_read_ptr + len) % scratch_buf_size;
281
282 PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
283 }
284
285
286 /* This increments the scratch extra read pointer */
287 static void scratch_inc_extra_ptr(int *ptr, int len)
288 {
289 *ptr = (*ptr + len) % scratch_buf_size;
290
291 PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
292 }
293
294
295 /* This gets data from the buffer */
296 static int scratch_get(struct usb_usbvision *usbvision, unsigned char *data,
297 int len)
298 {
299 int len_part;
300
301 if (usbvision->scratch_read_ptr + len < scratch_buf_size) {
302 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len);
303 usbvision->scratch_read_ptr += len;
304 } else {
305 len_part = scratch_buf_size - usbvision->scratch_read_ptr;
306 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len_part);
307 if (len == len_part) {
308 usbvision->scratch_read_ptr = 0; /* just set the read_ptr to zero */
309 } else {
310 memcpy(data + len_part, usbvision->scratch, len - len_part);
311 usbvision->scratch_read_ptr = len - len_part;
312 }
313 }
314
315 PDEBUG(DBG_SCRATCH, "len=%d, new read_ptr=%d\n", len, usbvision->scratch_read_ptr);
316
317 return len;
318 }
319
320
321 /* This sets read pointer to next header and returns it */
322 static int scratch_get_header(struct usb_usbvision *usbvision,
323 struct usbvision_frame_header *header)
324 {
325 int err_code = 0;
326
327 PDEBUG(DBG_SCRATCH, "from read_ptr=%d", usbvision->scratch_headermarker_read_ptr);
328
329 while (usbvision->scratch_headermarker_write_ptr -
330 usbvision->scratch_headermarker_read_ptr != 0) {
331 usbvision->scratch_read_ptr =
332 usbvision->scratch_headermarker[usbvision->scratch_headermarker_read_ptr];
333 usbvision->scratch_headermarker_read_ptr += 1;
334 usbvision->scratch_headermarker_read_ptr %= USBVISION_NUM_HEADERMARKER;
335 scratch_get(usbvision, (unsigned char *)header, USBVISION_HEADER_LENGTH);
336 if ((header->magic_1 == USBVISION_MAGIC_1)
337 && (header->magic_2 == USBVISION_MAGIC_2)
338 && (header->header_length == USBVISION_HEADER_LENGTH)) {
339 err_code = USBVISION_HEADER_LENGTH;
340 header->frame_width = header->frame_width_lo + (header->frame_width_hi << 8);
341 header->frame_height = header->frame_height_lo + (header->frame_height_hi << 8);
342 break;
343 }
344 }
345
346 return err_code;
347 }
348
349
350 /* This removes len bytes of old data from the buffer */
351 static void scratch_rm_old(struct usb_usbvision *usbvision, int len)
352 {
353 usbvision->scratch_read_ptr += len;
354 usbvision->scratch_read_ptr %= scratch_buf_size;
355 PDEBUG(DBG_SCRATCH, "read_ptr is now %d\n", usbvision->scratch_read_ptr);
356 }
357
358
359 /* This resets the buffer - kills all data in it too */
360 static void scratch_reset(struct usb_usbvision *usbvision)
361 {
362 PDEBUG(DBG_SCRATCH, "\n");
363
364 usbvision->scratch_read_ptr = 0;
365 usbvision->scratch_write_ptr = 0;
366 usbvision->scratch_headermarker_read_ptr = 0;
367 usbvision->scratch_headermarker_write_ptr = 0;
368 usbvision->isocstate = isoc_state_no_frame;
369 }
370
371 int usbvision_scratch_alloc(struct usb_usbvision *usbvision)
372 {
373 usbvision->scratch = vmalloc_32(scratch_buf_size);
374 scratch_reset(usbvision);
375 if (usbvision->scratch == NULL) {
376 dev_err(&usbvision->dev->dev,
377 "%s: unable to allocate %d bytes for scratch\n",
378 __func__, scratch_buf_size);
379 return -ENOMEM;
380 }
381 return 0;
382 }
383
384 void usbvision_scratch_free(struct usb_usbvision *usbvision)
385 {
386 vfree(usbvision->scratch);
387 usbvision->scratch = NULL;
388 }
389
390 /*
391 * usbvision_testpattern()
392 *
393 * Procedure forms a test pattern (yellow grid on blue background).
394 *
395 * Parameters:
396 * fullframe: if TRUE then entire frame is filled, otherwise the procedure
397 * continues from the current scanline.
398 * pmode 0: fill the frame with solid blue color (like on VCR or TV)
399 * 1: Draw a colored grid
400 *
401 */
402 static void usbvision_testpattern(struct usb_usbvision *usbvision,
403 int fullframe, int pmode)
404 {
405 static const char proc[] = "usbvision_testpattern";
406 struct usbvision_frame *frame;
407 unsigned char *f;
408 int num_cell = 0;
409 int scan_length = 0;
410 static int num_pass;
411
412 if (usbvision == NULL) {
413 printk(KERN_ERR "%s: usbvision == NULL\n", proc);
414 return;
415 }
416 if (usbvision->cur_frame == NULL) {
417 printk(KERN_ERR "%s: usbvision->cur_frame is NULL.\n", proc);
418 return;
419 }
420
421 /* Grab the current frame */
422 frame = usbvision->cur_frame;
423
424 /* Optionally start at the beginning */
425 if (fullframe) {
426 frame->curline = 0;
427 frame->scanlength = 0;
428 }
429
430 /* Form every scan line */
431 for (; frame->curline < frame->frmheight; frame->curline++) {
432 int i;
433
434 f = frame->data + (usbvision->curwidth * 3 * frame->curline);
435 for (i = 0; i < usbvision->curwidth; i++) {
436 unsigned char cb = 0x80;
437 unsigned char cg = 0;
438 unsigned char cr = 0;
439
440 if (pmode == 1) {
441 if (frame->curline % 32 == 0)
442 cb = 0, cg = cr = 0xFF;
443 else if (i % 32 == 0) {
444 if (frame->curline % 32 == 1)
445 num_cell++;
446 cb = 0, cg = cr = 0xFF;
447 } else {
448 cb =
449 ((num_cell * 7) +
450 num_pass) & 0xFF;
451 cg =
452 ((num_cell * 5) +
453 num_pass * 2) & 0xFF;
454 cr =
455 ((num_cell * 3) +
456 num_pass * 3) & 0xFF;
457 }
458 } else {
459 /* Just the blue screen */
460 }
461
462 *f++ = cb;
463 *f++ = cg;
464 *f++ = cr;
465 scan_length += 3;
466 }
467 }
468
469 frame->grabstate = frame_state_done;
470 frame->scanlength += scan_length;
471 ++num_pass;
472 }
473
474 /*
475 * usbvision_decompress_alloc()
476 *
477 * allocates intermediate buffer for decompression
478 */
479 int usbvision_decompress_alloc(struct usb_usbvision *usbvision)
480 {
481 int IFB_size = MAX_FRAME_WIDTH * MAX_FRAME_HEIGHT * 3 / 2;
482
483 usbvision->intra_frame_buffer = vmalloc_32(IFB_size);
484 if (usbvision->intra_frame_buffer == NULL) {
485 dev_err(&usbvision->dev->dev,
486 "%s: unable to allocate %d for compr. frame buffer\n",
487 __func__, IFB_size);
488 return -ENOMEM;
489 }
490 return 0;
491 }
492
493 /*
494 * usbvision_decompress_free()
495 *
496 * frees intermediate buffer for decompression
497 */
498 void usbvision_decompress_free(struct usb_usbvision *usbvision)
499 {
500 vfree(usbvision->intra_frame_buffer);
501 usbvision->intra_frame_buffer = NULL;
502
503 }
504
505 /************************************************************
506 * Here comes the data parsing stuff that is run as interrupt
507 ************************************************************/
508 /*
509 * usbvision_find_header()
510 *
511 * Locate one of supported header markers in the scratch buffer.
512 */
513 static enum parse_state usbvision_find_header(struct usb_usbvision *usbvision)
514 {
515 struct usbvision_frame *frame;
516 int found_header = 0;
517
518 frame = usbvision->cur_frame;
519
520 while (scratch_get_header(usbvision, &frame->isoc_header) == USBVISION_HEADER_LENGTH) {
521 /* found header in scratch */
522 PDEBUG(DBG_HEADER, "found header: 0x%02x%02x %d %d %d %d %#x 0x%02x %u %u",
523 frame->isoc_header.magic_2,
524 frame->isoc_header.magic_1,
525 frame->isoc_header.header_length,
526 frame->isoc_header.frame_num,
527 frame->isoc_header.frame_phase,
528 frame->isoc_header.frame_latency,
529 frame->isoc_header.data_format,
530 frame->isoc_header.format_param,
531 frame->isoc_header.frame_width,
532 frame->isoc_header.frame_height);
533
534 if (usbvision->request_intra) {
535 if (frame->isoc_header.format_param & 0x80) {
536 found_header = 1;
537 usbvision->last_isoc_frame_num = -1; /* do not check for lost frames this time */
538 usbvision_unrequest_intra(usbvision);
539 break;
540 }
541 } else {
542 found_header = 1;
543 break;
544 }
545 }
546
547 if (found_header) {
548 frame->frmwidth = frame->isoc_header.frame_width * usbvision->stretch_width;
549 frame->frmheight = frame->isoc_header.frame_height * usbvision->stretch_height;
550 frame->v4l2_linesize = (frame->frmwidth * frame->v4l2_format.depth) >> 3;
551 } else { /* no header found */
552 PDEBUG(DBG_HEADER, "skipping scratch data, no header");
553 scratch_reset(usbvision);
554 return parse_state_end_parse;
555 }
556
557 /* found header */
558 if (frame->isoc_header.data_format == ISOC_MODE_COMPRESS) {
559 /* check isoc_header.frame_num for lost frames */
560 if (usbvision->last_isoc_frame_num >= 0) {
561 if (((usbvision->last_isoc_frame_num + 1) % 32) != frame->isoc_header.frame_num) {
562 /* unexpected frame drop: need to request new intra frame */
563 PDEBUG(DBG_HEADER, "Lost frame before %d on USB", frame->isoc_header.frame_num);
564 usbvision_request_intra(usbvision);
565 return parse_state_next_frame;
566 }
567 }
568 usbvision->last_isoc_frame_num = frame->isoc_header.frame_num;
569 }
570 usbvision->header_count++;
571 frame->scanstate = scan_state_lines;
572 frame->curline = 0;
573
574 if (force_testpattern) {
575 usbvision_testpattern(usbvision, 1, 1);
576 return parse_state_next_frame;
577 }
578 return parse_state_continue;
579 }
580
581 static enum parse_state usbvision_parse_lines_422(struct usb_usbvision *usbvision,
582 long *pcopylen)
583 {
584 volatile struct usbvision_frame *frame;
585 unsigned char *f;
586 int len;
587 int i;
588 unsigned char yuyv[4] = { 180, 128, 10, 128 }; /* YUV components */
589 unsigned char rv, gv, bv; /* RGB components */
590 int clipmask_index, bytes_per_pixel;
591 int stretch_bytes, clipmask_add;
592
593 frame = usbvision->cur_frame;
594 f = frame->data + (frame->v4l2_linesize * frame->curline);
595
596 /* Make sure there's enough data for the entire line */
597 len = (frame->isoc_header.frame_width * 2) + 5;
598 if (scratch_len(usbvision) < len) {
599 PDEBUG(DBG_PARSE, "out of data in line %d, need %u.\n", frame->curline, len);
600 return parse_state_out;
601 }
602
603 if ((frame->curline + 1) >= frame->frmheight)
604 return parse_state_next_frame;
605
606 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
607 stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
608 clipmask_index = frame->curline * MAX_FRAME_WIDTH;
609 clipmask_add = usbvision->stretch_width;
610
611 for (i = 0; i < frame->frmwidth; i += (2 * usbvision->stretch_width)) {
612 scratch_get(usbvision, &yuyv[0], 4);
613
614 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
615 *f++ = yuyv[0]; /* Y */
616 *f++ = yuyv[3]; /* U */
617 } else {
618 YUV_TO_RGB_BY_THE_BOOK(yuyv[0], yuyv[1], yuyv[3], rv, gv, bv);
619 switch (frame->v4l2_format.format) {
620 case V4L2_PIX_FMT_RGB565:
621 *f++ = (0x1F & rv) |
622 (0xE0 & (gv << 5));
623 *f++ = (0x07 & (gv >> 3)) |
624 (0xF8 & bv);
625 break;
626 case V4L2_PIX_FMT_RGB24:
627 *f++ = rv;
628 *f++ = gv;
629 *f++ = bv;
630 break;
631 case V4L2_PIX_FMT_RGB32:
632 *f++ = rv;
633 *f++ = gv;
634 *f++ = bv;
635 f++;
636 break;
637 case V4L2_PIX_FMT_RGB555:
638 *f++ = (0x1F & rv) |
639 (0xE0 & (gv << 5));
640 *f++ = (0x03 & (gv >> 3)) |
641 (0x7C & (bv << 2));
642 break;
643 }
644 }
645 clipmask_index += clipmask_add;
646 f += stretch_bytes;
647
648 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
649 *f++ = yuyv[2]; /* Y */
650 *f++ = yuyv[1]; /* V */
651 } else {
652 YUV_TO_RGB_BY_THE_BOOK(yuyv[2], yuyv[1], yuyv[3], rv, gv, bv);
653 switch (frame->v4l2_format.format) {
654 case V4L2_PIX_FMT_RGB565:
655 *f++ = (0x1F & rv) |
656 (0xE0 & (gv << 5));
657 *f++ = (0x07 & (gv >> 3)) |
658 (0xF8 & bv);
659 break;
660 case V4L2_PIX_FMT_RGB24:
661 *f++ = rv;
662 *f++ = gv;
663 *f++ = bv;
664 break;
665 case V4L2_PIX_FMT_RGB32:
666 *f++ = rv;
667 *f++ = gv;
668 *f++ = bv;
669 f++;
670 break;
671 case V4L2_PIX_FMT_RGB555:
672 *f++ = (0x1F & rv) |
673 (0xE0 & (gv << 5));
674 *f++ = (0x03 & (gv >> 3)) |
675 (0x7C & (bv << 2));
676 break;
677 }
678 }
679 clipmask_index += clipmask_add;
680 f += stretch_bytes;
681 }
682
683 frame->curline += usbvision->stretch_height;
684 *pcopylen += frame->v4l2_linesize * usbvision->stretch_height;
685
686 if (frame->curline >= frame->frmheight)
687 return parse_state_next_frame;
688 return parse_state_continue;
689 }
690
691 /* The decompression routine */
692 static int usbvision_decompress(struct usb_usbvision *usbvision, unsigned char *compressed,
693 unsigned char *decompressed, int *start_pos,
694 int *block_typestart_pos, int len)
695 {
696 int rest_pixel, idx, max_pos, pos, extra_pos, block_len, block_type_pos, block_type_len;
697 unsigned char block_byte, block_code, block_type, block_type_byte, integrator;
698
699 integrator = 0;
700 pos = *start_pos;
701 block_type_pos = *block_typestart_pos;
702 max_pos = 396; /* pos + len; */
703 extra_pos = pos;
704 block_len = 0;
705 block_byte = 0;
706 block_code = 0;
707 block_type = 0;
708 block_type_byte = 0;
709 block_type_len = 0;
710 rest_pixel = len;
711
712 for (idx = 0; idx < len; idx++) {
713 if (block_len == 0) {
714 if (block_type_len == 0) {
715 block_type_byte = compressed[block_type_pos];
716 block_type_pos++;
717 block_type_len = 4;
718 }
719 block_type = (block_type_byte & 0xC0) >> 6;
720
721 /* statistic: */
722 usbvision->compr_block_types[block_type]++;
723
724 pos = extra_pos;
725 if (block_type == 0) {
726 if (rest_pixel >= 24) {
727 idx += 23;
728 rest_pixel -= 24;
729 integrator = decompressed[idx];
730 } else {
731 idx += rest_pixel - 1;
732 rest_pixel = 0;
733 }
734 } else {
735 block_code = compressed[pos];
736 pos++;
737 if (rest_pixel >= 24)
738 block_len = 24;
739 else
740 block_len = rest_pixel;
741 rest_pixel -= block_len;
742 extra_pos = pos + (block_len / 4);
743 }
744 block_type_byte <<= 2;
745 block_type_len -= 1;
746 }
747 if (block_len > 0) {
748 if ((block_len % 4) == 0) {
749 block_byte = compressed[pos];
750 pos++;
751 }
752 if (block_type == 1) /* inter Block */
753 integrator = decompressed[idx];
754 switch (block_byte & 0xC0) {
755 case 0x03 << 6:
756 integrator += compressed[extra_pos];
757 extra_pos++;
758 break;
759 case 0x02 << 6:
760 integrator += block_code;
761 break;
762 case 0x00:
763 integrator -= block_code;
764 break;
765 }
766 decompressed[idx] = integrator;
767 block_byte <<= 2;
768 block_len -= 1;
769 }
770 }
771 *start_pos = extra_pos;
772 *block_typestart_pos = block_type_pos;
773 return idx;
774 }
775
776
777 /*
778 * usbvision_parse_compress()
779 *
780 * Parse compressed frame from the scratch buffer, put
781 * decoded RGB value into the current frame buffer and add the written
782 * number of bytes (RGB) to the *pcopylen.
783 *
784 */
785 static enum parse_state usbvision_parse_compress(struct usb_usbvision *usbvision,
786 long *pcopylen)
787 {
788 #define USBVISION_STRIP_MAGIC 0x5A
789 #define USBVISION_STRIP_LEN_MAX 400
790 #define USBVISION_STRIP_HEADER_LEN 3
791
792 struct usbvision_frame *frame;
793 unsigned char *f, *u = NULL, *v = NULL;
794 unsigned char strip_data[USBVISION_STRIP_LEN_MAX];
795 unsigned char strip_header[USBVISION_STRIP_HEADER_LEN];
796 int idx, idx_end, strip_len, strip_ptr, startblock_pos, block_pos, block_type_pos;
797 int clipmask_index, bytes_per_pixel, rc;
798 int image_size;
799 unsigned char rv, gv, bv;
800 static unsigned char *Y, *U, *V;
801
802 frame = usbvision->cur_frame;
803 image_size = frame->frmwidth * frame->frmheight;
804 if ((frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) ||
805 (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420)) { /* this is a planar format */
806 /* ... v4l2_linesize not used here. */
807 f = frame->data + (frame->width * frame->curline);
808 } else
809 f = frame->data + (frame->v4l2_linesize * frame->curline);
810
811 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { /* initialise u and v pointers */
812 /* get base of u and b planes add halfoffset */
813 u = frame->data
814 + image_size
815 + (frame->frmwidth >> 1) * frame->curline;
816 v = u + (image_size >> 1);
817 } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) {
818 v = frame->data + image_size + ((frame->curline * (frame->width)) >> 2);
819 u = v + (image_size >> 2);
820 }
821
822 if (frame->curline == 0)
823 usbvision_adjust_compression(usbvision);
824
825 if (scratch_len(usbvision) < USBVISION_STRIP_HEADER_LEN)
826 return parse_state_out;
827
828 /* get strip header without changing the scratch_read_ptr */
829 scratch_set_extra_ptr(usbvision, &strip_ptr, 0);
830 scratch_get_extra(usbvision, &strip_header[0], &strip_ptr,
831 USBVISION_STRIP_HEADER_LEN);
832
833 if (strip_header[0] != USBVISION_STRIP_MAGIC) {
834 /* wrong strip magic */
835 usbvision->strip_magic_errors++;
836 return parse_state_next_frame;
837 }
838
839 if (frame->curline != (int)strip_header[2]) {
840 /* line number mismatch error */
841 usbvision->strip_line_number_errors++;
842 }
843
844 strip_len = 2 * (unsigned int)strip_header[1];
845 if (strip_len > USBVISION_STRIP_LEN_MAX) {
846 /* strip overrun */
847 /* I think this never happens */
848 usbvision_request_intra(usbvision);
849 }
850
851 if (scratch_len(usbvision) < strip_len) {
852 /* there is not enough data for the strip */
853 return parse_state_out;
854 }
855
856 if (usbvision->intra_frame_buffer) {
857 Y = usbvision->intra_frame_buffer + frame->frmwidth * frame->curline;
858 U = usbvision->intra_frame_buffer + image_size + (frame->frmwidth / 2) * (frame->curline / 2);
859 V = usbvision->intra_frame_buffer + image_size / 4 * 5 + (frame->frmwidth / 2) * (frame->curline / 2);
860 } else {
861 return parse_state_next_frame;
862 }
863
864 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
865 clipmask_index = frame->curline * MAX_FRAME_WIDTH;
866
867 scratch_get(usbvision, strip_data, strip_len);
868
869 idx_end = frame->frmwidth;
870 block_type_pos = USBVISION_STRIP_HEADER_LEN;
871 startblock_pos = block_type_pos + (idx_end - 1) / 96 + (idx_end / 2 - 1) / 96 + 2;
872 block_pos = startblock_pos;
873
874 usbvision->block_pos = block_pos;
875
876 rc = usbvision_decompress(usbvision, strip_data, Y, &block_pos, &block_type_pos, idx_end);
877 if (strip_len > usbvision->max_strip_len)
878 usbvision->max_strip_len = strip_len;
879
880 if (frame->curline % 2)
881 rc = usbvision_decompress(usbvision, strip_data, V, &block_pos, &block_type_pos, idx_end / 2);
882 else
883 rc = usbvision_decompress(usbvision, strip_data, U, &block_pos, &block_type_pos, idx_end / 2);
884
885 if (block_pos > usbvision->comprblock_pos)
886 usbvision->comprblock_pos = block_pos;
887 if (block_pos > strip_len)
888 usbvision->strip_len_errors++;
889
890 for (idx = 0; idx < idx_end; idx++) {
891 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
892 *f++ = Y[idx];
893 *f++ = idx & 0x01 ? U[idx / 2] : V[idx / 2];
894 } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) {
895 *f++ = Y[idx];
896 if (idx & 0x01)
897 *u++ = U[idx >> 1];
898 else
899 *v++ = V[idx >> 1];
900 } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) {
901 *f++ = Y[idx];
902 if (!((idx & 0x01) | (frame->curline & 0x01))) {
903 /* only need do this for 1 in 4 pixels */
904 /* intraframe buffer is YUV420 format */
905 *u++ = U[idx >> 1];
906 *v++ = V[idx >> 1];
907 }
908 } else {
909 YUV_TO_RGB_BY_THE_BOOK(Y[idx], U[idx / 2], V[idx / 2], rv, gv, bv);
910 switch (frame->v4l2_format.format) {
911 case V4L2_PIX_FMT_GREY:
912 *f++ = Y[idx];
913 break;
914 case V4L2_PIX_FMT_RGB555:
915 *f++ = (0x1F & rv) |
916 (0xE0 & (gv << 5));
917 *f++ = (0x03 & (gv >> 3)) |
918 (0x7C & (bv << 2));
919 break;
920 case V4L2_PIX_FMT_RGB565:
921 *f++ = (0x1F & rv) |
922 (0xE0 & (gv << 5));
923 *f++ = (0x07 & (gv >> 3)) |
924 (0xF8 & bv);
925 break;
926 case V4L2_PIX_FMT_RGB24:
927 *f++ = rv;
928 *f++ = gv;
929 *f++ = bv;
930 break;
931 case V4L2_PIX_FMT_RGB32:
932 *f++ = rv;
933 *f++ = gv;
934 *f++ = bv;
935 f++;
936 break;
937 }
938 }
939 clipmask_index++;
940 }
941 /* Deal with non-integer no. of bytes for YUV420P */
942 if (frame->v4l2_format.format != V4L2_PIX_FMT_YVU420)
943 *pcopylen += frame->v4l2_linesize;
944 else
945 *pcopylen += frame->curline & 0x01 ? frame->v4l2_linesize : frame->v4l2_linesize << 1;
946
947 frame->curline += 1;
948
949 if (frame->curline >= frame->frmheight)
950 return parse_state_next_frame;
951 return parse_state_continue;
952
953 }
954
955
956 /*
957 * usbvision_parse_lines_420()
958 *
959 * Parse two lines from the scratch buffer, put
960 * decoded RGB value into the current frame buffer and add the written
961 * number of bytes (RGB) to the *pcopylen.
962 *
963 */
964 static enum parse_state usbvision_parse_lines_420(struct usb_usbvision *usbvision,
965 long *pcopylen)
966 {
967 struct usbvision_frame *frame;
968 unsigned char *f_even = NULL, *f_odd = NULL;
969 unsigned int pixel_per_line, block;
970 int pixel, block_split;
971 int y_ptr, u_ptr, v_ptr, y_odd_offset;
972 const int y_block_size = 128;
973 const int uv_block_size = 64;
974 const int sub_block_size = 32;
975 const int y_step[] = { 0, 0, 0, 2 }, y_step_size = 4;
976 const int uv_step[] = { 0, 0, 0, 4 }, uv_step_size = 4;
977 unsigned char y[2], u, v; /* YUV components */
978 int y_, u_, v_, vb, uvg, ur;
979 int r_, g_, b_; /* RGB components */
980 unsigned char g;
981 int clipmask_even_index, clipmask_odd_index, bytes_per_pixel;
982 int clipmask_add, stretch_bytes;
983
984 frame = usbvision->cur_frame;
985 f_even = frame->data + (frame->v4l2_linesize * frame->curline);
986 f_odd = f_even + frame->v4l2_linesize * usbvision->stretch_height;
987
988 /* Make sure there's enough data for the entire line */
989 /* In this mode usbvision transfer 3 bytes for every 2 pixels */
990 /* I need two lines to decode the color */
991 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
992 stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
993 clipmask_even_index = frame->curline * MAX_FRAME_WIDTH;
994 clipmask_odd_index = clipmask_even_index + MAX_FRAME_WIDTH;
995 clipmask_add = usbvision->stretch_width;
996 pixel_per_line = frame->isoc_header.frame_width;
997
998 if (scratch_len(usbvision) < (int)pixel_per_line * 3) {
999 /* printk(KERN_DEBUG "out of data, need %d\n", len); */
1000 return parse_state_out;
1001 }
1002
1003 if ((frame->curline + 1) >= frame->frmheight)
1004 return parse_state_next_frame;
1005
1006 block_split = (pixel_per_line%y_block_size) ? 1 : 0; /* are some blocks splitted into different lines? */
1007
1008 y_odd_offset = (pixel_per_line / y_block_size) * (y_block_size + uv_block_size)
1009 + block_split * uv_block_size;
1010
1011 scratch_set_extra_ptr(usbvision, &y_ptr, y_odd_offset);
1012 scratch_set_extra_ptr(usbvision, &u_ptr, y_block_size);
1013 scratch_set_extra_ptr(usbvision, &v_ptr, y_odd_offset
1014 + (4 - block_split) * sub_block_size);
1015
1016 for (block = 0; block < (pixel_per_line / sub_block_size); block++) {
1017 for (pixel = 0; pixel < sub_block_size; pixel += 2) {
1018 scratch_get(usbvision, &y[0], 2);
1019 scratch_get_extra(usbvision, &u, &u_ptr, 1);
1020 scratch_get_extra(usbvision, &v, &v_ptr, 1);
1021
1022 /* I don't use the YUV_TO_RGB macro for better performance */
1023 v_ = v - 128;
1024 u_ = u - 128;
1025 vb = 132252 * v_;
1026 uvg = -53281 * u_ - 25625 * v_;
1027 ur = 104595 * u_;
1028
1029 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1030 *f_even++ = y[0];
1031 *f_even++ = v;
1032 } else {
1033 y_ = 76284 * (y[0] - 16);
1034
1035 b_ = (y_ + vb) >> 16;
1036 g_ = (y_ + uvg) >> 16;
1037 r_ = (y_ + ur) >> 16;
1038
1039 switch (frame->v4l2_format.format) {
1040 case V4L2_PIX_FMT_RGB565:
1041 g = LIMIT_RGB(g_);
1042 *f_even++ =
1043 (0x1F & LIMIT_RGB(r_)) |
1044 (0xE0 & (g << 5));
1045 *f_even++ =
1046 (0x07 & (g >> 3)) |
1047 (0xF8 & LIMIT_RGB(b_));
1048 break;
1049 case V4L2_PIX_FMT_RGB24:
1050 *f_even++ = LIMIT_RGB(r_);
1051 *f_even++ = LIMIT_RGB(g_);
1052 *f_even++ = LIMIT_RGB(b_);
1053 break;
1054 case V4L2_PIX_FMT_RGB32:
1055 *f_even++ = LIMIT_RGB(r_);
1056 *f_even++ = LIMIT_RGB(g_);
1057 *f_even++ = LIMIT_RGB(b_);
1058 f_even++;
1059 break;
1060 case V4L2_PIX_FMT_RGB555:
1061 g = LIMIT_RGB(g_);
1062 *f_even++ = (0x1F & LIMIT_RGB(r_)) |
1063 (0xE0 & (g << 5));
1064 *f_even++ = (0x03 & (g >> 3)) |
1065 (0x7C & (LIMIT_RGB(b_) << 2));
1066 break;
1067 }
1068 }
1069 clipmask_even_index += clipmask_add;
1070 f_even += stretch_bytes;
1071
1072 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1073 *f_even++ = y[1];
1074 *f_even++ = u;
1075 } else {
1076 y_ = 76284 * (y[1] - 16);
1077
1078 b_ = (y_ + vb) >> 16;
1079 g_ = (y_ + uvg) >> 16;
1080 r_ = (y_ + ur) >> 16;
1081
1082 switch (frame->v4l2_format.format) {
1083 case V4L2_PIX_FMT_RGB565:
1084 g = LIMIT_RGB(g_);
1085 *f_even++ =
1086 (0x1F & LIMIT_RGB(r_)) |
1087 (0xE0 & (g << 5));
1088 *f_even++ =
1089 (0x07 & (g >> 3)) |
1090 (0xF8 & LIMIT_RGB(b_));
1091 break;
1092 case V4L2_PIX_FMT_RGB24:
1093 *f_even++ = LIMIT_RGB(r_);
1094 *f_even++ = LIMIT_RGB(g_);
1095 *f_even++ = LIMIT_RGB(b_);
1096 break;
1097 case V4L2_PIX_FMT_RGB32:
1098 *f_even++ = LIMIT_RGB(r_);
1099 *f_even++ = LIMIT_RGB(g_);
1100 *f_even++ = LIMIT_RGB(b_);
1101 f_even++;
1102 break;
1103 case V4L2_PIX_FMT_RGB555:
1104 g = LIMIT_RGB(g_);
1105 *f_even++ = (0x1F & LIMIT_RGB(r_)) |
1106 (0xE0 & (g << 5));
1107 *f_even++ = (0x03 & (g >> 3)) |
1108 (0x7C & (LIMIT_RGB(b_) << 2));
1109 break;
1110 }
1111 }
1112 clipmask_even_index += clipmask_add;
1113 f_even += stretch_bytes;
1114
1115 scratch_get_extra(usbvision, &y[0], &y_ptr, 2);
1116
1117 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1118 *f_odd++ = y[0];
1119 *f_odd++ = v;
1120 } else {
1121 y_ = 76284 * (y[0] - 16);
1122
1123 b_ = (y_ + vb) >> 16;
1124 g_ = (y_ + uvg) >> 16;
1125 r_ = (y_ + ur) >> 16;
1126
1127 switch (frame->v4l2_format.format) {
1128 case V4L2_PIX_FMT_RGB565:
1129 g = LIMIT_RGB(g_);
1130 *f_odd++ =
1131 (0x1F & LIMIT_RGB(r_)) |
1132 (0xE0 & (g << 5));
1133 *f_odd++ =
1134 (0x07 & (g >> 3)) |
1135 (0xF8 & LIMIT_RGB(b_));
1136 break;
1137 case V4L2_PIX_FMT_RGB24:
1138 *f_odd++ = LIMIT_RGB(r_);
1139 *f_odd++ = LIMIT_RGB(g_);
1140 *f_odd++ = LIMIT_RGB(b_);
1141 break;
1142 case V4L2_PIX_FMT_RGB32:
1143 *f_odd++ = LIMIT_RGB(r_);
1144 *f_odd++ = LIMIT_RGB(g_);
1145 *f_odd++ = LIMIT_RGB(b_);
1146 f_odd++;
1147 break;
1148 case V4L2_PIX_FMT_RGB555:
1149 g = LIMIT_RGB(g_);
1150 *f_odd++ = (0x1F & LIMIT_RGB(r_)) |
1151 (0xE0 & (g << 5));
1152 *f_odd++ = (0x03 & (g >> 3)) |
1153 (0x7C & (LIMIT_RGB(b_) << 2));
1154 break;
1155 }
1156 }
1157 clipmask_odd_index += clipmask_add;
1158 f_odd += stretch_bytes;
1159
1160 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1161 *f_odd++ = y[1];
1162 *f_odd++ = u;
1163 } else {
1164 y_ = 76284 * (y[1] - 16);
1165
1166 b_ = (y_ + vb) >> 16;
1167 g_ = (y_ + uvg) >> 16;
1168 r_ = (y_ + ur) >> 16;
1169
1170 switch (frame->v4l2_format.format) {
1171 case V4L2_PIX_FMT_RGB565:
1172 g = LIMIT_RGB(g_);
1173 *f_odd++ =
1174 (0x1F & LIMIT_RGB(r_)) |
1175 (0xE0 & (g << 5));
1176 *f_odd++ =
1177 (0x07 & (g >> 3)) |
1178 (0xF8 & LIMIT_RGB(b_));
1179 break;
1180 case V4L2_PIX_FMT_RGB24:
1181 *f_odd++ = LIMIT_RGB(r_);
1182 *f_odd++ = LIMIT_RGB(g_);
1183 *f_odd++ = LIMIT_RGB(b_);
1184 break;
1185 case V4L2_PIX_FMT_RGB32:
1186 *f_odd++ = LIMIT_RGB(r_);
1187 *f_odd++ = LIMIT_RGB(g_);
1188 *f_odd++ = LIMIT_RGB(b_);
1189 f_odd++;
1190 break;
1191 case V4L2_PIX_FMT_RGB555:
1192 g = LIMIT_RGB(g_);
1193 *f_odd++ = (0x1F & LIMIT_RGB(r_)) |
1194 (0xE0 & (g << 5));
1195 *f_odd++ = (0x03 & (g >> 3)) |
1196 (0x7C & (LIMIT_RGB(b_) << 2));
1197 break;
1198 }
1199 }
1200 clipmask_odd_index += clipmask_add;
1201 f_odd += stretch_bytes;
1202 }
1203
1204 scratch_rm_old(usbvision, y_step[block % y_step_size] * sub_block_size);
1205 scratch_inc_extra_ptr(&y_ptr, y_step[(block + 2 * block_split) % y_step_size]
1206 * sub_block_size);
1207 scratch_inc_extra_ptr(&u_ptr, uv_step[block % uv_step_size]
1208 * sub_block_size);
1209 scratch_inc_extra_ptr(&v_ptr, uv_step[(block + 2 * block_split) % uv_step_size]
1210 * sub_block_size);
1211 }
1212
1213 scratch_rm_old(usbvision, pixel_per_line * 3 / 2
1214 + block_split * sub_block_size);
1215
1216 frame->curline += 2 * usbvision->stretch_height;
1217 *pcopylen += frame->v4l2_linesize * 2 * usbvision->stretch_height;
1218
1219 if (frame->curline >= frame->frmheight)
1220 return parse_state_next_frame;
1221 return parse_state_continue;
1222 }
1223
1224 /*
1225 * usbvision_parse_data()
1226 *
1227 * Generic routine to parse the scratch buffer. It employs either
1228 * usbvision_find_header() or usbvision_parse_lines() to do most
1229 * of work.
1230 *
1231 */
1232 static void usbvision_parse_data(struct usb_usbvision *usbvision)
1233 {
1234 struct usbvision_frame *frame;
1235 enum parse_state newstate;
1236 long copylen = 0;
1237 unsigned long lock_flags;
1238
1239 frame = usbvision->cur_frame;
1240
1241 PDEBUG(DBG_PARSE, "parsing len=%d\n", scratch_len(usbvision));
1242
1243 while (1) {
1244 newstate = parse_state_out;
1245 if (scratch_len(usbvision)) {
1246 if (frame->scanstate == scan_state_scanning) {
1247 newstate = usbvision_find_header(usbvision);
1248 } else if (frame->scanstate == scan_state_lines) {
1249 if (usbvision->isoc_mode == ISOC_MODE_YUV420)
1250 newstate = usbvision_parse_lines_420(usbvision, &copylen);
1251 else if (usbvision->isoc_mode == ISOC_MODE_YUV422)
1252 newstate = usbvision_parse_lines_422(usbvision, &copylen);
1253 else if (usbvision->isoc_mode == ISOC_MODE_COMPRESS)
1254 newstate = usbvision_parse_compress(usbvision, &copylen);
1255 }
1256 }
1257 if (newstate == parse_state_continue)
1258 continue;
1259 if ((newstate == parse_state_next_frame) || (newstate == parse_state_out))
1260 break;
1261 return; /* parse_state_end_parse */
1262 }
1263
1264 if (newstate == parse_state_next_frame) {
1265 frame->grabstate = frame_state_done;
1266 do_gettimeofday(&(frame->timestamp));
1267 frame->sequence = usbvision->frame_num;
1268
1269 spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
1270 list_move_tail(&(frame->frame), &usbvision->outqueue);
1271 usbvision->cur_frame = NULL;
1272 spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
1273
1274 usbvision->frame_num++;
1275
1276 /* This will cause the process to request another frame. */
1277 if (waitqueue_active(&usbvision->wait_frame)) {
1278 PDEBUG(DBG_PARSE, "Wake up !");
1279 wake_up_interruptible(&usbvision->wait_frame);
1280 }
1281 } else {
1282 frame->grabstate = frame_state_grabbing;
1283 }
1284
1285 /* Update the frame's uncompressed length. */
1286 frame->scanlength += copylen;
1287 }
1288
1289
1290 /*
1291 * Make all of the blocks of data contiguous
1292 */
1293 static int usbvision_compress_isochronous(struct usb_usbvision *usbvision,
1294 struct urb *urb)
1295 {
1296 unsigned char *packet_data;
1297 int i, totlen = 0;
1298
1299 for (i = 0; i < urb->number_of_packets; i++) {
1300 int packet_len = urb->iso_frame_desc[i].actual_length;
1301 int packet_stat = urb->iso_frame_desc[i].status;
1302
1303 packet_data = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
1304
1305 /* Detect and ignore errored packets */
1306 if (packet_stat) { /* packet_stat != 0 ????????????? */
1307 PDEBUG(DBG_ISOC, "data error: [%d] len=%d, status=%X", i, packet_len, packet_stat);
1308 usbvision->isoc_err_count++;
1309 continue;
1310 }
1311
1312 /* Detect and ignore empty packets */
1313 if (packet_len < 0) {
1314 PDEBUG(DBG_ISOC, "error packet [%d]", i);
1315 usbvision->isoc_skip_count++;
1316 continue;
1317 } else if (packet_len == 0) { /* Frame end ????? */
1318 PDEBUG(DBG_ISOC, "null packet [%d]", i);
1319 usbvision->isocstate = isoc_state_no_frame;
1320 usbvision->isoc_skip_count++;
1321 continue;
1322 } else if (packet_len > usbvision->isoc_packet_size) {
1323 PDEBUG(DBG_ISOC, "packet[%d] > isoc_packet_size", i);
1324 usbvision->isoc_skip_count++;
1325 continue;
1326 }
1327
1328 PDEBUG(DBG_ISOC, "packet ok [%d] len=%d", i, packet_len);
1329
1330 if (usbvision->isocstate == isoc_state_no_frame) { /* new frame begins */
1331 usbvision->isocstate = isoc_state_in_frame;
1332 scratch_mark_header(usbvision);
1333 usbvision_measure_bandwidth(usbvision);
1334 PDEBUG(DBG_ISOC, "packet with header");
1335 }
1336
1337 /*
1338 * If usbvision continues to feed us with data but there is no
1339 * consumption (if, for example, V4L client fell asleep) we
1340 * may overflow the buffer. We have to move old data over to
1341 * free room for new data. This is bad for old data. If we
1342 * just drop new data then it's bad for new data... choose
1343 * your favorite evil here.
1344 */
1345 if (scratch_free(usbvision) < packet_len) {
1346 usbvision->scratch_ovf_count++;
1347 PDEBUG(DBG_ISOC, "scratch buf overflow! scr_len: %d, n: %d",
1348 scratch_len(usbvision), packet_len);
1349 scratch_rm_old(usbvision, packet_len - scratch_free(usbvision));
1350 }
1351
1352 /* Now we know that there is enough room in scratch buffer */
1353 scratch_put(usbvision, packet_data, packet_len);
1354 totlen += packet_len;
1355 usbvision->isoc_data_count += packet_len;
1356 usbvision->isoc_packet_count++;
1357 }
1358 #if ENABLE_HEXDUMP
1359 if (totlen > 0) {
1360 static int foo;
1361
1362 if (foo < 1) {
1363 printk(KERN_DEBUG "+%d.\n", usbvision->scratchlen);
1364 usbvision_hexdump(data0, (totlen > 64) ? 64 : totlen);
1365 ++foo;
1366 }
1367 }
1368 #endif
1369 return totlen;
1370 }
1371
1372 static void usbvision_isoc_irq(struct urb *urb)
1373 {
1374 int err_code = 0;
1375 int len;
1376 struct usb_usbvision *usbvision = urb->context;
1377 int i;
1378 unsigned long start_time = jiffies;
1379 struct usbvision_frame **f;
1380
1381 /* We don't want to do anything if we are about to be removed! */
1382 if (!USBVISION_IS_OPERATIONAL(usbvision))
1383 return;
1384
1385 /* any urb with wrong status is ignored without acknowledgement */
1386 if (urb->status == -ENOENT)
1387 return;
1388
1389 f = &usbvision->cur_frame;
1390
1391 /* Manage streaming interruption */
1392 if (usbvision->streaming == stream_interrupt) {
1393 usbvision->streaming = stream_idle;
1394 if ((*f)) {
1395 (*f)->grabstate = frame_state_ready;
1396 (*f)->scanstate = scan_state_scanning;
1397 }
1398 PDEBUG(DBG_IRQ, "stream interrupted");
1399 wake_up_interruptible(&usbvision->wait_stream);
1400 }
1401
1402 /* Copy the data received into our scratch buffer */
1403 len = usbvision_compress_isochronous(usbvision, urb);
1404
1405 usbvision->isoc_urb_count++;
1406 usbvision->urb_length = len;
1407
1408 if (usbvision->streaming == stream_on) {
1409 /* If we collected enough data let's parse! */
1410 if (scratch_len(usbvision) > USBVISION_HEADER_LENGTH &&
1411 !list_empty(&(usbvision->inqueue))) {
1412 if (!(*f)) {
1413 (*f) = list_entry(usbvision->inqueue.next,
1414 struct usbvision_frame,
1415 frame);
1416 }
1417 usbvision_parse_data(usbvision);
1418 } else {
1419 /* If we don't have a frame
1420 we're current working on, complain */
1421 PDEBUG(DBG_IRQ,
1422 "received data, but no one needs it");
1423 scratch_reset(usbvision);
1424 }
1425 } else {
1426 PDEBUG(DBG_IRQ, "received data, but no one needs it");
1427 scratch_reset(usbvision);
1428 }
1429
1430 usbvision->time_in_irq += jiffies - start_time;
1431
1432 for (i = 0; i < USBVISION_URB_FRAMES; i++) {
1433 urb->iso_frame_desc[i].status = 0;
1434 urb->iso_frame_desc[i].actual_length = 0;
1435 }
1436
1437 urb->status = 0;
1438 urb->dev = usbvision->dev;
1439 err_code = usb_submit_urb(urb, GFP_ATOMIC);
1440
1441 if (err_code) {
1442 dev_err(&usbvision->dev->dev,
1443 "%s: usb_submit_urb failed: error %d\n",
1444 __func__, err_code);
1445 }
1446
1447 return;
1448 }
1449
1450 /*************************************/
1451 /* Low level usbvision access functions */
1452 /*************************************/
1453
1454 /*
1455 * usbvision_read_reg()
1456 *
1457 * return < 0 -> Error
1458 * >= 0 -> Data
1459 */
1460
1461 int usbvision_read_reg(struct usb_usbvision *usbvision, unsigned char reg)
1462 {
1463 int err_code = 0;
1464 unsigned char buffer[1];
1465
1466 if (!USBVISION_IS_OPERATIONAL(usbvision))
1467 return -1;
1468
1469 err_code = usb_control_msg(usbvision->dev, usb_rcvctrlpipe(usbvision->dev, 1),
1470 USBVISION_OP_CODE,
1471 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1472 0, (__u16) reg, buffer, 1, HZ);
1473
1474 if (err_code < 0) {
1475 dev_err(&usbvision->dev->dev,
1476 "%s: failed: error %d\n", __func__, err_code);
1477 return err_code;
1478 }
1479 return buffer[0];
1480 }
1481
1482 /*
1483 * usbvision_write_reg()
1484 *
1485 * return 1 -> Reg written
1486 * 0 -> usbvision is not yet ready
1487 * -1 -> Something went wrong
1488 */
1489
1490 int usbvision_write_reg(struct usb_usbvision *usbvision, unsigned char reg,
1491 unsigned char value)
1492 {
1493 int err_code = 0;
1494
1495 if (!USBVISION_IS_OPERATIONAL(usbvision))
1496 return 0;
1497
1498 err_code = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1499 USBVISION_OP_CODE,
1500 USB_DIR_OUT | USB_TYPE_VENDOR |
1501 USB_RECIP_ENDPOINT, 0, (__u16) reg, &value, 1, HZ);
1502
1503 if (err_code < 0) {
1504 dev_err(&usbvision->dev->dev,
1505 "%s: failed: error %d\n", __func__, err_code);
1506 }
1507 return err_code;
1508 }
1509
1510
1511 static void usbvision_ctrl_urb_complete(struct urb *urb)
1512 {
1513 struct usb_usbvision *usbvision = (struct usb_usbvision *)urb->context;
1514
1515 PDEBUG(DBG_IRQ, "");
1516 usbvision->ctrl_urb_busy = 0;
1517 if (waitqueue_active(&usbvision->ctrl_urb_wq))
1518 wake_up_interruptible(&usbvision->ctrl_urb_wq);
1519 }
1520
1521
1522 static int usbvision_write_reg_irq(struct usb_usbvision *usbvision, int address,
1523 unsigned char *data, int len)
1524 {
1525 int err_code = 0;
1526
1527 PDEBUG(DBG_IRQ, "");
1528 if (len > 8)
1529 return -EFAULT;
1530 if (usbvision->ctrl_urb_busy)
1531 return -EBUSY;
1532 usbvision->ctrl_urb_busy = 1;
1533
1534 usbvision->ctrl_urb_setup.bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT;
1535 usbvision->ctrl_urb_setup.bRequest = USBVISION_OP_CODE;
1536 usbvision->ctrl_urb_setup.wValue = 0;
1537 usbvision->ctrl_urb_setup.wIndex = cpu_to_le16(address);
1538 usbvision->ctrl_urb_setup.wLength = cpu_to_le16(len);
1539 usb_fill_control_urb(usbvision->ctrl_urb, usbvision->dev,
1540 usb_sndctrlpipe(usbvision->dev, 1),
1541 (unsigned char *)&usbvision->ctrl_urb_setup,
1542 (void *)usbvision->ctrl_urb_buffer, len,
1543 usbvision_ctrl_urb_complete,
1544 (void *)usbvision);
1545
1546 memcpy(usbvision->ctrl_urb_buffer, data, len);
1547
1548 err_code = usb_submit_urb(usbvision->ctrl_urb, GFP_ATOMIC);
1549 if (err_code < 0) {
1550 /* error in usb_submit_urb() */
1551 usbvision->ctrl_urb_busy = 0;
1552 }
1553 PDEBUG(DBG_IRQ, "submit %d byte: error %d", len, err_code);
1554 return err_code;
1555 }
1556
1557
1558 static int usbvision_init_compression(struct usb_usbvision *usbvision)
1559 {
1560 int err_code = 0;
1561
1562 usbvision->last_isoc_frame_num = -1;
1563 usbvision->isoc_data_count = 0;
1564 usbvision->isoc_packet_count = 0;
1565 usbvision->isoc_skip_count = 0;
1566 usbvision->compr_level = 50;
1567 usbvision->last_compr_level = -1;
1568 usbvision->isoc_urb_count = 0;
1569 usbvision->request_intra = 1;
1570 usbvision->isoc_measure_bandwidth_count = 0;
1571
1572 return err_code;
1573 }
1574
1575 /* this function measures the used bandwidth since last call
1576 * return: 0 : no error
1577 * sets used_bandwidth to 1-100 : 1-100% of full bandwidth resp. to isoc_packet_size
1578 */
1579 static int usbvision_measure_bandwidth(struct usb_usbvision *usbvision)
1580 {
1581 int err_code = 0;
1582
1583 if (usbvision->isoc_measure_bandwidth_count < 2) { /* this gives an average bandwidth of 3 frames */
1584 usbvision->isoc_measure_bandwidth_count++;
1585 return err_code;
1586 }
1587 if ((usbvision->isoc_packet_size > 0) && (usbvision->isoc_packet_count > 0)) {
1588 usbvision->used_bandwidth = usbvision->isoc_data_count /
1589 (usbvision->isoc_packet_count + usbvision->isoc_skip_count) *
1590 100 / usbvision->isoc_packet_size;
1591 }
1592 usbvision->isoc_measure_bandwidth_count = 0;
1593 usbvision->isoc_data_count = 0;
1594 usbvision->isoc_packet_count = 0;
1595 usbvision->isoc_skip_count = 0;
1596 return err_code;
1597 }
1598
1599 static int usbvision_adjust_compression(struct usb_usbvision *usbvision)
1600 {
1601 int err_code = 0;
1602 unsigned char buffer[6];
1603
1604 PDEBUG(DBG_IRQ, "");
1605 if ((adjust_compression) && (usbvision->used_bandwidth > 0)) {
1606 usbvision->compr_level += (usbvision->used_bandwidth - 90) / 2;
1607 RESTRICT_TO_RANGE(usbvision->compr_level, 0, 100);
1608 if (usbvision->compr_level != usbvision->last_compr_level) {
1609 int distortion;
1610
1611 if (usbvision->bridge_type == BRIDGE_NT1004 || usbvision->bridge_type == BRIDGE_NT1005) {
1612 buffer[0] = (unsigned char)(4 + 16 * usbvision->compr_level / 100); /* PCM Threshold 1 */
1613 buffer[1] = (unsigned char)(4 + 8 * usbvision->compr_level / 100); /* PCM Threshold 2 */
1614 distortion = 7 + 248 * usbvision->compr_level / 100;
1615 buffer[2] = (unsigned char)(distortion & 0xFF); /* Average distortion Threshold (inter) */
1616 buffer[3] = (unsigned char)(distortion & 0xFF); /* Average distortion Threshold (intra) */
1617 distortion = 1 + 42 * usbvision->compr_level / 100;
1618 buffer[4] = (unsigned char)(distortion & 0xFF); /* Maximum distortion Threshold (inter) */
1619 buffer[5] = (unsigned char)(distortion & 0xFF); /* Maximum distortion Threshold (intra) */
1620 } else { /* BRIDGE_NT1003 */
1621 buffer[0] = (unsigned char)(4 + 16 * usbvision->compr_level / 100); /* PCM threshold 1 */
1622 buffer[1] = (unsigned char)(4 + 8 * usbvision->compr_level / 100); /* PCM threshold 2 */
1623 distortion = 2 + 253 * usbvision->compr_level / 100;
1624 buffer[2] = (unsigned char)(distortion & 0xFF); /* distortion threshold bit0-7 */
1625 buffer[3] = 0; /* (unsigned char)((distortion >> 8) & 0x0F); distortion threshold bit 8-11 */
1626 distortion = 0 + 43 * usbvision->compr_level / 100;
1627 buffer[4] = (unsigned char)(distortion & 0xFF); /* maximum distortion bit0-7 */
1628 buffer[5] = 0; /* (unsigned char)((distortion >> 8) & 0x01); maximum distortion bit 8 */
1629 }
1630 err_code = usbvision_write_reg_irq(usbvision, USBVISION_PCM_THR1, buffer, 6);
1631 if (err_code == 0) {
1632 PDEBUG(DBG_IRQ, "new compr params %#02x %#02x %#02x %#02x %#02x %#02x", buffer[0],
1633 buffer[1], buffer[2], buffer[3], buffer[4], buffer[5]);
1634 usbvision->last_compr_level = usbvision->compr_level;
1635 }
1636 }
1637 }
1638 return err_code;
1639 }
1640
1641 static int usbvision_request_intra(struct usb_usbvision *usbvision)
1642 {
1643 int err_code = 0;
1644 unsigned char buffer[1];
1645
1646 PDEBUG(DBG_IRQ, "");
1647 usbvision->request_intra = 1;
1648 buffer[0] = 1;
1649 usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1650 return err_code;
1651 }
1652
1653 static int usbvision_unrequest_intra(struct usb_usbvision *usbvision)
1654 {
1655 int err_code = 0;
1656 unsigned char buffer[1];
1657
1658 PDEBUG(DBG_IRQ, "");
1659 usbvision->request_intra = 0;
1660 buffer[0] = 0;
1661 usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1662 return err_code;
1663 }
1664
1665 /*******************************
1666 * usbvision utility functions
1667 *******************************/
1668
1669 int usbvision_power_off(struct usb_usbvision *usbvision)
1670 {
1671 int err_code = 0;
1672
1673 PDEBUG(DBG_FUNC, "");
1674
1675 err_code = usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
1676 if (err_code == 1)
1677 usbvision->power = 0;
1678 PDEBUG(DBG_FUNC, "%s: err_code %d", (err_code != 1) ? "ERROR" : "power is off", err_code);
1679 return err_code;
1680 }
1681
1682 /*
1683 * usbvision_set_video_format()
1684 *
1685 */
1686 static int usbvision_set_video_format(struct usb_usbvision *usbvision, int format)
1687 {
1688 static const char proc[] = "usbvision_set_video_format";
1689 int rc;
1690 unsigned char value[2];
1691
1692 if (!USBVISION_IS_OPERATIONAL(usbvision))
1693 return 0;
1694
1695 PDEBUG(DBG_FUNC, "isoc_mode %#02x", format);
1696
1697 if ((format != ISOC_MODE_YUV422)
1698 && (format != ISOC_MODE_YUV420)
1699 && (format != ISOC_MODE_COMPRESS)) {
1700 printk(KERN_ERR "usbvision: unknown video format %02x, using default YUV420",
1701 format);
1702 format = ISOC_MODE_YUV420;
1703 }
1704 value[0] = 0x0A; /* TODO: See the effect of the filter */
1705 value[1] = format; /* Sets the VO_MODE register which follows FILT_CONT */
1706 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1707 USBVISION_OP_CODE,
1708 USB_DIR_OUT | USB_TYPE_VENDOR |
1709 USB_RECIP_ENDPOINT, 0,
1710 (__u16) USBVISION_FILT_CONT, value, 2, HZ);
1711
1712 if (rc < 0) {
1713 printk(KERN_ERR "%s: ERROR=%d. USBVISION stopped - "
1714 "reconnect or reload driver.\n", proc, rc);
1715 }
1716 usbvision->isoc_mode = format;
1717 return rc;
1718 }
1719
1720 /*
1721 * usbvision_set_output()
1722 *
1723 */
1724
1725 int usbvision_set_output(struct usb_usbvision *usbvision, int width,
1726 int height)
1727 {
1728 int err_code = 0;
1729 int usb_width, usb_height;
1730 unsigned int frame_rate = 0, frame_drop = 0;
1731 unsigned char value[4];
1732
1733 if (!USBVISION_IS_OPERATIONAL(usbvision))
1734 return 0;
1735
1736 if (width > MAX_USB_WIDTH) {
1737 usb_width = width / 2;
1738 usbvision->stretch_width = 2;
1739 } else {
1740 usb_width = width;
1741 usbvision->stretch_width = 1;
1742 }
1743
1744 if (height > MAX_USB_HEIGHT) {
1745 usb_height = height / 2;
1746 usbvision->stretch_height = 2;
1747 } else {
1748 usb_height = height;
1749 usbvision->stretch_height = 1;
1750 }
1751
1752 RESTRICT_TO_RANGE(usb_width, MIN_FRAME_WIDTH, MAX_USB_WIDTH);
1753 usb_width &= ~(MIN_FRAME_WIDTH-1);
1754 RESTRICT_TO_RANGE(usb_height, MIN_FRAME_HEIGHT, MAX_USB_HEIGHT);
1755 usb_height &= ~(1);
1756
1757 PDEBUG(DBG_FUNC, "usb %dx%d; screen %dx%d; stretch %dx%d",
1758 usb_width, usb_height, width, height,
1759 usbvision->stretch_width, usbvision->stretch_height);
1760
1761 /* I'll not rewrite the same values */
1762 if ((usb_width != usbvision->curwidth) || (usb_height != usbvision->curheight)) {
1763 value[0] = usb_width & 0xff; /* LSB */
1764 value[1] = (usb_width >> 8) & 0x03; /* MSB */
1765 value[2] = usb_height & 0xff; /* LSB */
1766 value[3] = (usb_height >> 8) & 0x03; /* MSB */
1767
1768 err_code = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1769 USBVISION_OP_CODE,
1770 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1771 0, (__u16) USBVISION_LXSIZE_O, value, 4, HZ);
1772
1773 if (err_code < 0) {
1774 dev_err(&usbvision->dev->dev,
1775 "%s failed: error %d\n", __func__, err_code);
1776 return err_code;
1777 }
1778 usbvision->curwidth = usbvision->stretch_width * usb_width;
1779 usbvision->curheight = usbvision->stretch_height * usb_height;
1780 }
1781
1782 if (usbvision->isoc_mode == ISOC_MODE_YUV422)
1783 frame_rate = (usbvision->isoc_packet_size * 1000) / (usb_width * usb_height * 2);
1784 else if (usbvision->isoc_mode == ISOC_MODE_YUV420)
1785 frame_rate = (usbvision->isoc_packet_size * 1000) / ((usb_width * usb_height * 12) / 8);
1786 else
1787 frame_rate = FRAMERATE_MAX;
1788
1789 if (usbvision->tvnorm_id & V4L2_STD_625_50)
1790 frame_drop = frame_rate * 32 / 25 - 1;
1791 else if (usbvision->tvnorm_id & V4L2_STD_525_60)
1792 frame_drop = frame_rate * 32 / 30 - 1;
1793
1794 RESTRICT_TO_RANGE(frame_drop, FRAMERATE_MIN, FRAMERATE_MAX);
1795
1796 PDEBUG(DBG_FUNC, "frame_rate %d fps, frame_drop %d", frame_rate, frame_drop);
1797
1798 frame_drop = FRAMERATE_MAX; /* We can allow the maximum here, because dropping is controlled */
1799
1800 /* frame_drop = 7; => frame_phase = 1, 5, 9, 13, 17, 21, 25, 0, 4, 8, ...
1801 => frame_skip = 4;
1802 => frame_rate = (7 + 1) * 25 / 32 = 200 / 32 = 6.25;
1803
1804 frame_drop = 9; => frame_phase = 1, 5, 8, 11, 14, 17, 21, 24, 27, 1, 4, 8, ...
1805 => frame_skip = 4, 3, 3, 3, 3, 4, 3, 3, 3, 3, 4, ...
1806 => frame_rate = (9 + 1) * 25 / 32 = 250 / 32 = 7.8125;
1807 */
1808 err_code = usbvision_write_reg(usbvision, USBVISION_FRM_RATE, frame_drop);
1809 return err_code;
1810 }
1811
1812
1813 /*
1814 * usbvision_frames_alloc
1815 * allocate the required frames
1816 */
1817 int usbvision_frames_alloc(struct usb_usbvision *usbvision, int number_of_frames)
1818 {
1819 int i;
1820
1821 /* needs to be page aligned cause the buffers can be mapped individually! */
1822 usbvision->max_frame_size = PAGE_ALIGN(usbvision->curwidth *
1823 usbvision->curheight *
1824 usbvision->palette.bytes_per_pixel);
1825
1826 /* Try to do my best to allocate the frames the user want in the remaining memory */
1827 usbvision->num_frames = number_of_frames;
1828 while (usbvision->num_frames > 0) {
1829 usbvision->fbuf_size = usbvision->num_frames * usbvision->max_frame_size;
1830 usbvision->fbuf = usbvision_rvmalloc(usbvision->fbuf_size);
1831 if (usbvision->fbuf)
1832 break;
1833 usbvision->num_frames--;
1834 }
1835
1836 spin_lock_init(&usbvision->queue_lock);
1837 init_waitqueue_head(&usbvision->wait_frame);
1838 init_waitqueue_head(&usbvision->wait_stream);
1839
1840 /* Allocate all buffers */
1841 for (i = 0; i < usbvision->num_frames; i++) {
1842 usbvision->frame[i].index = i;
1843 usbvision->frame[i].grabstate = frame_state_unused;
1844 usbvision->frame[i].data = usbvision->fbuf +
1845 i * usbvision->max_frame_size;
1846 /*
1847 * Set default sizes for read operation.
1848 */
1849 usbvision->stretch_width = 1;
1850 usbvision->stretch_height = 1;
1851 usbvision->frame[i].width = usbvision->curwidth;
1852 usbvision->frame[i].height = usbvision->curheight;
1853 usbvision->frame[i].bytes_read = 0;
1854 }
1855 PDEBUG(DBG_FUNC, "allocated %d frames (%d bytes per frame)",
1856 usbvision->num_frames, usbvision->max_frame_size);
1857 return usbvision->num_frames;
1858 }
1859
1860 /*
1861 * usbvision_frames_free
1862 * frees memory allocated for the frames
1863 */
1864 void usbvision_frames_free(struct usb_usbvision *usbvision)
1865 {
1866 /* Have to free all that memory */
1867 PDEBUG(DBG_FUNC, "free %d frames", usbvision->num_frames);
1868
1869 if (usbvision->fbuf != NULL) {
1870 usbvision_rvfree(usbvision->fbuf, usbvision->fbuf_size);
1871 usbvision->fbuf = NULL;
1872
1873 usbvision->num_frames = 0;
1874 }
1875 }
1876 /*
1877 * usbvision_empty_framequeues()
1878 * prepare queues for incoming and outgoing frames
1879 */
1880 void usbvision_empty_framequeues(struct usb_usbvision *usbvision)
1881 {
1882 u32 i;
1883
1884 INIT_LIST_HEAD(&(usbvision->inqueue));
1885 INIT_LIST_HEAD(&(usbvision->outqueue));
1886
1887 for (i = 0; i < USBVISION_NUMFRAMES; i++) {
1888 usbvision->frame[i].grabstate = frame_state_unused;
1889 usbvision->frame[i].bytes_read = 0;
1890 }
1891 }
1892
1893 /*
1894 * usbvision_stream_interrupt()
1895 * stops streaming
1896 */
1897 int usbvision_stream_interrupt(struct usb_usbvision *usbvision)
1898 {
1899 int ret = 0;
1900
1901 /* stop reading from the device */
1902
1903 usbvision->streaming = stream_interrupt;
1904 ret = wait_event_timeout(usbvision->wait_stream,
1905 (usbvision->streaming == stream_idle),
1906 msecs_to_jiffies(USBVISION_NUMSBUF*USBVISION_URB_FRAMES));
1907 return ret;
1908 }
1909
1910 /*
1911 * usbvision_set_compress_params()
1912 *
1913 */
1914
1915 static int usbvision_set_compress_params(struct usb_usbvision *usbvision)
1916 {
1917 static const char proc[] = "usbvision_set_compresion_params: ";
1918 int rc;
1919 unsigned char value[6];
1920
1921 value[0] = 0x0F; /* Intra-Compression cycle */
1922 value[1] = 0x01; /* Reg.45 one line per strip */
1923 value[2] = 0x00; /* Reg.46 Force intra mode on all new frames */
1924 value[3] = 0x00; /* Reg.47 FORCE_UP <- 0 normal operation (not force) */
1925 value[4] = 0xA2; /* Reg.48 BUF_THR I'm not sure if this does something in not compressed mode. */
1926 value[5] = 0x00; /* Reg.49 DVI_YUV This has nothing to do with compression */
1927
1928 /* catched values for NT1004 */
1929 /* value[0] = 0xFF; Never apply intra mode automatically */
1930 /* value[1] = 0xF1; Use full frame height for virtual strip width; One line per strip */
1931 /* value[2] = 0x01; Force intra mode on all new frames */
1932 /* value[3] = 0x00; Strip size 400 Bytes; do not force up */
1933 /* value[4] = 0xA2; */
1934 if (!USBVISION_IS_OPERATIONAL(usbvision))
1935 return 0;
1936
1937 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1938 USBVISION_OP_CODE,
1939 USB_DIR_OUT | USB_TYPE_VENDOR |
1940 USB_RECIP_ENDPOINT, 0,
1941 (__u16) USBVISION_INTRA_CYC, value, 5, HZ);
1942
1943 if (rc < 0) {
1944 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
1945 "reconnect or reload driver.\n", proc, rc);
1946 return rc;
1947 }
1948
1949 if (usbvision->bridge_type == BRIDGE_NT1004) {
1950 value[0] = 20; /* PCM Threshold 1 */
1951 value[1] = 12; /* PCM Threshold 2 */
1952 value[2] = 255; /* Distortion Threshold inter */
1953 value[3] = 255; /* Distortion Threshold intra */
1954 value[4] = 43; /* Max Distortion inter */
1955 value[5] = 43; /* Max Distortion intra */
1956 } else {
1957 value[0] = 20; /* PCM Threshold 1 */
1958 value[1] = 12; /* PCM Threshold 2 */
1959 value[2] = 255; /* Distortion Threshold d7-d0 */
1960 value[3] = 0; /* Distortion Threshold d11-d8 */
1961 value[4] = 43; /* Max Distortion d7-d0 */
1962 value[5] = 0; /* Max Distortion d8 */
1963 }
1964
1965 if (!USBVISION_IS_OPERATIONAL(usbvision))
1966 return 0;
1967
1968 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1969 USBVISION_OP_CODE,
1970 USB_DIR_OUT | USB_TYPE_VENDOR |
1971 USB_RECIP_ENDPOINT, 0,
1972 (__u16) USBVISION_PCM_THR1, value, 6, HZ);
1973
1974 if (rc < 0) {
1975 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
1976 "reconnect or reload driver.\n", proc, rc);
1977 }
1978 return rc;
1979 }
1980
1981
1982 /*
1983 * usbvision_set_input()
1984 *
1985 * Set the input (saa711x, ...) size x y and other misc input params
1986 * I've no idea if this parameters are right
1987 *
1988 */
1989 int usbvision_set_input(struct usb_usbvision *usbvision)
1990 {
1991 static const char proc[] = "usbvision_set_input: ";
1992 int rc;
1993 unsigned char value[8];
1994 unsigned char dvi_yuv_value;
1995
1996 if (!USBVISION_IS_OPERATIONAL(usbvision))
1997 return 0;
1998
1999 /* Set input format expected from decoder*/
2000 if (usbvision_device_data[usbvision->dev_model].vin_reg1_override) {
2001 value[0] = usbvision_device_data[usbvision->dev_model].vin_reg1;
2002 } else if (usbvision_device_data[usbvision->dev_model].codec == CODEC_SAA7113) {
2003 /* SAA7113 uses 8 bit output */
2004 value[0] = USBVISION_8_422_SYNC;
2005 } else {
2006 /* I'm sure only about d2-d0 [010] 16 bit 4:2:2 usin sync pulses
2007 * as that is how saa7111 is configured */
2008 value[0] = USBVISION_16_422_SYNC;
2009 /* | USBVISION_VSNC_POL | USBVISION_VCLK_POL);*/
2010 }
2011
2012 rc = usbvision_write_reg(usbvision, USBVISION_VIN_REG1, value[0]);
2013 if (rc < 0) {
2014 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2015 "reconnect or reload driver.\n", proc, rc);
2016 return rc;
2017 }
2018
2019
2020 if (usbvision->tvnorm_id & V4L2_STD_PAL) {
2021 value[0] = 0xC0;
2022 value[1] = 0x02; /* 0x02C0 -> 704 Input video line length */
2023 value[2] = 0x20;
2024 value[3] = 0x01; /* 0x0120 -> 288 Input video n. of lines */
2025 value[4] = 0x60;
2026 value[5] = 0x00; /* 0x0060 -> 96 Input video h offset */
2027 value[6] = 0x16;
2028 value[7] = 0x00; /* 0x0016 -> 22 Input video v offset */
2029 } else if (usbvision->tvnorm_id & V4L2_STD_SECAM) {
2030 value[0] = 0xC0;
2031 value[1] = 0x02; /* 0x02C0 -> 704 Input video line length */
2032 value[2] = 0x20;
2033 value[3] = 0x01; /* 0x0120 -> 288 Input video n. of lines */
2034 value[4] = 0x01;
2035 value[5] = 0x00; /* 0x0001 -> 01 Input video h offset */
2036 value[6] = 0x01;
2037 value[7] = 0x00; /* 0x0001 -> 01 Input video v offset */
2038 } else { /* V4L2_STD_NTSC */
2039 value[0] = 0xD0;
2040 value[1] = 0x02; /* 0x02D0 -> 720 Input video line length */
2041 value[2] = 0xF0;
2042 value[3] = 0x00; /* 0x00F0 -> 240 Input video number of lines */
2043 value[4] = 0x50;
2044 value[5] = 0x00; /* 0x0050 -> 80 Input video h offset */
2045 value[6] = 0x10;
2046 value[7] = 0x00; /* 0x0010 -> 16 Input video v offset */
2047 }
2048
2049 if (usbvision_device_data[usbvision->dev_model].x_offset >= 0) {
2050 value[4] = usbvision_device_data[usbvision->dev_model].x_offset & 0xff;
2051 value[5] = (usbvision_device_data[usbvision->dev_model].x_offset & 0x0300) >> 8;
2052 }
2053
2054 if (adjust_x_offset != -1) {
2055 value[4] = adjust_x_offset & 0xff;
2056 value[5] = (adjust_x_offset & 0x0300) >> 8;
2057 }
2058
2059 if (usbvision_device_data[usbvision->dev_model].y_offset >= 0) {
2060 value[6] = usbvision_device_data[usbvision->dev_model].y_offset & 0xff;
2061 value[7] = (usbvision_device_data[usbvision->dev_model].y_offset & 0x0300) >> 8;
2062 }
2063
2064 if (adjust_y_offset != -1) {
2065 value[6] = adjust_y_offset & 0xff;
2066 value[7] = (adjust_y_offset & 0x0300) >> 8;
2067 }
2068
2069 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2070 USBVISION_OP_CODE, /* USBVISION specific code */
2071 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0,
2072 (__u16) USBVISION_LXSIZE_I, value, 8, HZ);
2073 if (rc < 0) {
2074 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2075 "reconnect or reload driver.\n", proc, rc);
2076 return rc;
2077 }
2078
2079
2080 dvi_yuv_value = 0x00; /* U comes after V, Ya comes after U/V, Yb comes after Yb */
2081
2082 if (usbvision_device_data[usbvision->dev_model].dvi_yuv_override) {
2083 dvi_yuv_value = usbvision_device_data[usbvision->dev_model].dvi_yuv;
2084 } else if (usbvision_device_data[usbvision->dev_model].codec == CODEC_SAA7113) {
2085 /* This changes as the fine sync control changes. Further investigation necessary */
2086 dvi_yuv_value = 0x06;
2087 }
2088
2089 return usbvision_write_reg(usbvision, USBVISION_DVI_YUV, dvi_yuv_value);
2090 }
2091
2092
2093 /*
2094 * usbvision_set_dram_settings()
2095 *
2096 * Set the buffer address needed by the usbvision dram to operate
2097 * This values has been taken with usbsnoop.
2098 *
2099 */
2100
2101 static int usbvision_set_dram_settings(struct usb_usbvision *usbvision)
2102 {
2103 int rc;
2104 unsigned char value[8];
2105
2106 if (usbvision->isoc_mode == ISOC_MODE_COMPRESS) {
2107 value[0] = 0x42;
2108 value[1] = 0x71;
2109 value[2] = 0xff;
2110 value[3] = 0x00;
2111 value[4] = 0x98;
2112 value[5] = 0xe0;
2113 value[6] = 0x71;
2114 value[7] = 0xff;
2115 /* UR: 0x0E200-0x3FFFF = 204288 Words (1 Word = 2 Byte) */
2116 /* FDL: 0x00000-0x0E099 = 57498 Words */
2117 /* VDW: 0x0E3FF-0x3FFFF */
2118 } else {
2119 value[0] = 0x42;
2120 value[1] = 0x00;
2121 value[2] = 0xff;
2122 value[3] = 0x00;
2123 value[4] = 0x00;
2124 value[5] = 0x00;
2125 value[6] = 0x00;
2126 value[7] = 0xff;
2127 }
2128 /* These are the values of the address of the video buffer,
2129 * they have to be loaded into the USBVISION_DRM_PRM1-8
2130 *
2131 * Start address of video output buffer for read: drm_prm1-2 -> 0x00000
2132 * End address of video output buffer for read: drm_prm1-3 -> 0x1ffff
2133 * Start address of video frame delay buffer: drm_prm1-4 -> 0x20000
2134 * Only used in compressed mode
2135 * End address of video frame delay buffer: drm_prm1-5-6 -> 0x3ffff
2136 * Only used in compressed mode
2137 * Start address of video output buffer for write: drm_prm1-7 -> 0x00000
2138 * End address of video output buffer for write: drm_prm1-8 -> 0x1ffff
2139 */
2140
2141 if (!USBVISION_IS_OPERATIONAL(usbvision))
2142 return 0;
2143
2144 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2145 USBVISION_OP_CODE, /* USBVISION specific code */
2146 USB_DIR_OUT | USB_TYPE_VENDOR |
2147 USB_RECIP_ENDPOINT, 0,
2148 (__u16) USBVISION_DRM_PRM1, value, 8, HZ);
2149
2150 if (rc < 0) {
2151 dev_err(&usbvision->dev->dev, "%sERROR=%d\n", __func__, rc);
2152 return rc;
2153 }
2154
2155 /* Restart the video buffer logic */
2156 rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, USBVISION_RES_UR |
2157 USBVISION_RES_FDL | USBVISION_RES_VDW);
2158 if (rc < 0)
2159 return rc;
2160 rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, 0x00);
2161
2162 return rc;
2163 }
2164
2165 /*
2166 * ()
2167 *
2168 * Power on the device, enables suspend-resume logic
2169 * & reset the isoc End-Point
2170 *
2171 */
2172
2173 int usbvision_power_on(struct usb_usbvision *usbvision)
2174 {
2175 int err_code = 0;
2176
2177 PDEBUG(DBG_FUNC, "");
2178
2179 usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
2180 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2181 USBVISION_SSPND_EN | USBVISION_RES2);
2182
2183 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2184 USBVISION_SSPND_EN | USBVISION_PWR_VID);
2185 err_code = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2186 USBVISION_SSPND_EN | USBVISION_PWR_VID | USBVISION_RES2);
2187 if (err_code == 1)
2188 usbvision->power = 1;
2189 PDEBUG(DBG_FUNC, "%s: err_code %d", (err_code < 0) ? "ERROR" : "power is on", err_code);
2190 return err_code;
2191 }
2192
2193
2194 /*
2195 * usbvision timer stuff
2196 */
2197
2198 /* to call usbvision_power_off from task queue */
2199 static void call_usbvision_power_off(struct work_struct *work)
2200 {
2201 struct usb_usbvision *usbvision = container_of(work, struct usb_usbvision, power_off_work);
2202
2203 PDEBUG(DBG_FUNC, "");
2204 if (mutex_lock_interruptible(&usbvision->v4l2_lock))
2205 return;
2206
2207 if (usbvision->user == 0) {
2208 usbvision_i2c_unregister(usbvision);
2209
2210 usbvision_power_off(usbvision);
2211 usbvision->initialized = 0;
2212 }
2213 mutex_unlock(&usbvision->v4l2_lock);
2214 }
2215
2216 static void usbvision_power_off_timer(unsigned long data)
2217 {
2218 struct usb_usbvision *usbvision = (void *)data;
2219
2220 PDEBUG(DBG_FUNC, "");
2221 del_timer(&usbvision->power_off_timer);
2222 INIT_WORK(&usbvision->power_off_work, call_usbvision_power_off);
2223 (void) schedule_work(&usbvision->power_off_work);
2224 }
2225
2226 void usbvision_init_power_off_timer(struct usb_usbvision *usbvision)
2227 {
2228 init_timer(&usbvision->power_off_timer);
2229 usbvision->power_off_timer.data = (long)usbvision;
2230 usbvision->power_off_timer.function = usbvision_power_off_timer;
2231 }
2232
2233 void usbvision_set_power_off_timer(struct usb_usbvision *usbvision)
2234 {
2235 mod_timer(&usbvision->power_off_timer, jiffies + USBVISION_POWEROFF_TIME);
2236 }
2237
2238 void usbvision_reset_power_off_timer(struct usb_usbvision *usbvision)
2239 {
2240 if (timer_pending(&usbvision->power_off_timer))
2241 del_timer(&usbvision->power_off_timer);
2242 }
2243
2244 /*
2245 * usbvision_begin_streaming()
2246 * Sure you have to put bit 7 to 0, if not incoming frames are droped, but no
2247 * idea about the rest
2248 */
2249 int usbvision_begin_streaming(struct usb_usbvision *usbvision)
2250 {
2251 if (usbvision->isoc_mode == ISOC_MODE_COMPRESS)
2252 usbvision_init_compression(usbvision);
2253 return usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
2254 USBVISION_NOHVALID | usbvision->vin_reg2_preset);
2255 }
2256
2257 /*
2258 * usbvision_restart_isoc()
2259 * Not sure yet if touching here PWR_REG make loose the config
2260 */
2261
2262 int usbvision_restart_isoc(struct usb_usbvision *usbvision)
2263 {
2264 int ret;
2265
2266 ret = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2267 USBVISION_SSPND_EN | USBVISION_PWR_VID);
2268 if (ret < 0)
2269 return ret;
2270 ret = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2271 USBVISION_SSPND_EN | USBVISION_PWR_VID |
2272 USBVISION_RES2);
2273 if (ret < 0)
2274 return ret;
2275 ret = usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
2276 USBVISION_KEEP_BLANK | USBVISION_NOHVALID |
2277 usbvision->vin_reg2_preset);
2278 if (ret < 0)
2279 return ret;
2280
2281 /* TODO: schedule timeout */
2282 while ((usbvision_read_reg(usbvision, USBVISION_STATUS_REG) & 0x01) != 1)
2283 ;
2284
2285 return 0;
2286 }
2287
2288 int usbvision_audio_off(struct usb_usbvision *usbvision)
2289 {
2290 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, USBVISION_AUDIO_MUTE) < 0) {
2291 printk(KERN_ERR "usbvision_audio_off: can't write reg\n");
2292 return -1;
2293 }
2294 usbvision->audio_mute = 0;
2295 usbvision->audio_channel = USBVISION_AUDIO_MUTE;
2296 return 0;
2297 }
2298
2299 int usbvision_set_audio(struct usb_usbvision *usbvision, int audio_channel)
2300 {
2301 if (!usbvision->audio_mute) {
2302 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, audio_channel) < 0) {
2303 printk(KERN_ERR "usbvision_set_audio: can't write iopin register for audio switching\n");
2304 return -1;
2305 }
2306 }
2307 usbvision->audio_channel = audio_channel;
2308 return 0;
2309 }
2310
2311 int usbvision_setup(struct usb_usbvision *usbvision, int format)
2312 {
2313 usbvision_set_video_format(usbvision, format);
2314 usbvision_set_dram_settings(usbvision);
2315 usbvision_set_compress_params(usbvision);
2316 usbvision_set_input(usbvision);
2317 usbvision_set_output(usbvision, MAX_USB_WIDTH, MAX_USB_HEIGHT);
2318 usbvision_restart_isoc(usbvision);
2319
2320 /* cosas del PCM */
2321 return USBVISION_IS_OPERATIONAL(usbvision);
2322 }
2323
2324 int usbvision_set_alternate(struct usb_usbvision *dev)
2325 {
2326 int err_code, prev_alt = dev->iface_alt;
2327 int i;
2328
2329 dev->iface_alt = 0;
2330 for (i = 0; i < dev->num_alt; i++)
2331 if (dev->alt_max_pkt_size[i] > dev->alt_max_pkt_size[dev->iface_alt])
2332 dev->iface_alt = i;
2333
2334 if (dev->iface_alt != prev_alt) {
2335 dev->isoc_packet_size = dev->alt_max_pkt_size[dev->iface_alt];
2336 PDEBUG(DBG_FUNC, "setting alternate %d with max_packet_size=%u",
2337 dev->iface_alt, dev->isoc_packet_size);
2338 err_code = usb_set_interface(dev->dev, dev->iface, dev->iface_alt);
2339 if (err_code < 0) {
2340 dev_err(&dev->dev->dev,
2341 "cannot change alternate number to %d (error=%i)\n",
2342 dev->iface_alt, err_code);
2343 return err_code;
2344 }
2345 }
2346
2347 PDEBUG(DBG_ISOC, "ISO Packet Length:%d", dev->isoc_packet_size);
2348
2349 return 0;
2350 }
2351
2352 /*
2353 * usbvision_init_isoc()
2354 *
2355 */
2356 int usbvision_init_isoc(struct usb_usbvision *usbvision)
2357 {
2358 struct usb_device *dev = usbvision->dev;
2359 int buf_idx, err_code, reg_value;
2360 int sb_size;
2361
2362 if (!USBVISION_IS_OPERATIONAL(usbvision))
2363 return -EFAULT;
2364
2365 usbvision->cur_frame = NULL;
2366 scratch_reset(usbvision);
2367
2368 /* Alternate interface 1 is is the biggest frame size */
2369 err_code = usbvision_set_alternate(usbvision);
2370 if (err_code < 0) {
2371 usbvision->last_error = err_code;
2372 return -EBUSY;
2373 }
2374 sb_size = USBVISION_URB_FRAMES * usbvision->isoc_packet_size;
2375
2376 reg_value = (16 - usbvision_read_reg(usbvision,
2377 USBVISION_ALTER_REG)) & 0x0F;
2378
2379 usbvision->usb_bandwidth = reg_value >> 1;
2380 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec",
2381 usbvision->usb_bandwidth);
2382
2383
2384
2385 /* We double buffer the Iso lists */
2386
2387 for (buf_idx = 0; buf_idx < USBVISION_NUMSBUF; buf_idx++) {
2388 int j, k;
2389 struct urb *urb;
2390
2391 urb = usb_alloc_urb(USBVISION_URB_FRAMES, GFP_KERNEL);
2392 if (urb == NULL) {
2393 dev_err(&usbvision->dev->dev,
2394 "%s: usb_alloc_urb() failed\n", __func__);
2395 return -ENOMEM;
2396 }
2397 usbvision->sbuf[buf_idx].urb = urb;
2398 usbvision->sbuf[buf_idx].data =
2399 usb_alloc_coherent(usbvision->dev,
2400 sb_size,
2401 GFP_KERNEL,
2402 &urb->transfer_dma);
2403 urb->dev = dev;
2404 urb->context = usbvision;
2405 urb->pipe = usb_rcvisocpipe(dev, usbvision->video_endp);
2406 urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
2407 urb->interval = 1;
2408 urb->transfer_buffer = usbvision->sbuf[buf_idx].data;
2409 urb->complete = usbvision_isoc_irq;
2410 urb->number_of_packets = USBVISION_URB_FRAMES;
2411 urb->transfer_buffer_length =
2412 usbvision->isoc_packet_size * USBVISION_URB_FRAMES;
2413 for (j = k = 0; j < USBVISION_URB_FRAMES; j++,
2414 k += usbvision->isoc_packet_size) {
2415 urb->iso_frame_desc[j].offset = k;
2416 urb->iso_frame_desc[j].length =
2417 usbvision->isoc_packet_size;
2418 }
2419 }
2420
2421 /* Submit all URBs */
2422 for (buf_idx = 0; buf_idx < USBVISION_NUMSBUF; buf_idx++) {
2423 err_code = usb_submit_urb(usbvision->sbuf[buf_idx].urb,
2424 GFP_KERNEL);
2425 if (err_code) {
2426 dev_err(&usbvision->dev->dev,
2427 "%s: usb_submit_urb(%d) failed: error %d\n",
2428 __func__, buf_idx, err_code);
2429 }
2430 }
2431
2432 usbvision->streaming = stream_idle;
2433 PDEBUG(DBG_ISOC, "%s: streaming=1 usbvision->video_endp=$%02x",
2434 __func__,
2435 usbvision->video_endp);
2436 return 0;
2437 }
2438
2439 /*
2440 * usbvision_stop_isoc()
2441 *
2442 * This procedure stops streaming and deallocates URBs. Then it
2443 * activates zero-bandwidth alt. setting of the video interface.
2444 *
2445 */
2446 void usbvision_stop_isoc(struct usb_usbvision *usbvision)
2447 {
2448 int buf_idx, err_code, reg_value;
2449 int sb_size = USBVISION_URB_FRAMES * usbvision->isoc_packet_size;
2450
2451 if ((usbvision->streaming == stream_off) || (usbvision->dev == NULL))
2452 return;
2453
2454 /* Unschedule all of the iso td's */
2455 for (buf_idx = 0; buf_idx < USBVISION_NUMSBUF; buf_idx++) {
2456 usb_kill_urb(usbvision->sbuf[buf_idx].urb);
2457 if (usbvision->sbuf[buf_idx].data) {
2458 usb_free_coherent(usbvision->dev,
2459 sb_size,
2460 usbvision->sbuf[buf_idx].data,
2461 usbvision->sbuf[buf_idx].urb->transfer_dma);
2462 }
2463 usb_free_urb(usbvision->sbuf[buf_idx].urb);
2464 usbvision->sbuf[buf_idx].urb = NULL;
2465 }
2466
2467 PDEBUG(DBG_ISOC, "%s: streaming=stream_off\n", __func__);
2468 usbvision->streaming = stream_off;
2469
2470 if (!usbvision->remove_pending) {
2471 /* Set packet size to 0 */
2472 usbvision->iface_alt = 0;
2473 err_code = usb_set_interface(usbvision->dev, usbvision->iface,
2474 usbvision->iface_alt);
2475 if (err_code < 0) {
2476 dev_err(&usbvision->dev->dev,
2477 "%s: usb_set_interface() failed: error %d\n",
2478 __func__, err_code);
2479 usbvision->last_error = err_code;
2480 }
2481 reg_value = (16-usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F;
2482 usbvision->isoc_packet_size =
2483 (reg_value == 0) ? 0 : (reg_value * 64) - 1;
2484 PDEBUG(DBG_ISOC, "ISO Packet Length:%d",
2485 usbvision->isoc_packet_size);
2486
2487 usbvision->usb_bandwidth = reg_value >> 1;
2488 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec",
2489 usbvision->usb_bandwidth);
2490 }
2491 }
2492
2493 int usbvision_muxsel(struct usb_usbvision *usbvision, int channel)
2494 {
2495 /* inputs #0 and #3 are constant for every SAA711x. */
2496 /* inputs #1 and #2 are variable for SAA7111 and SAA7113 */
2497 int mode[4] = { SAA7115_COMPOSITE0, 0, 0, SAA7115_COMPOSITE3 };
2498 int audio[] = { 1, 0, 0, 0 };
2499 /* channel 0 is TV with audiochannel 1 (tuner mono) */
2500 /* channel 1 is Composite with audio channel 0 (line in) */
2501 /* channel 2 is S-Video with audio channel 0 (line in) */
2502 /* channel 3 is additional video inputs to the device with audio channel 0 (line in) */
2503
2504 RESTRICT_TO_RANGE(channel, 0, usbvision->video_inputs);
2505 usbvision->ctl_input = channel;
2506
2507 /* set the new channel */
2508 /* Regular USB TV Tuners -> channel: 0 = Television, 1 = Composite, 2 = S-Video */
2509 /* Four video input devices -> channel: 0 = Chan White, 1 = Chan Green, 2 = Chan Yellow, 3 = Chan Red */
2510
2511 switch (usbvision_device_data[usbvision->dev_model].codec) {
2512 case CODEC_SAA7113:
2513 mode[1] = SAA7115_COMPOSITE2;
2514 if (switch_svideo_input) {
2515 /* To handle problems with S-Video Input for
2516 * some devices. Use switch_svideo_input
2517 * parameter when loading the module.*/
2518 mode[2] = SAA7115_COMPOSITE1;
2519 } else {
2520 mode[2] = SAA7115_SVIDEO1;
2521 }
2522 break;
2523 case CODEC_SAA7111:
2524 default:
2525 /* modes for saa7111 */
2526 mode[1] = SAA7115_COMPOSITE1;
2527 mode[2] = SAA7115_SVIDEO1;
2528 break;
2529 }
2530 call_all(usbvision, video, s_routing, mode[channel], 0, 0);
2531 usbvision_set_audio(usbvision, audio[channel]);
2532 return 0;
2533 }
2534
2535 /*
2536 * Overrides for Emacs so that we follow Linus's tabbing style.
2537 * ---------------------------------------------------------------------------
2538 * Local variables:
2539 * c-basic-offset: 8
2540 * End:
2541 */
AMDTP streaming driver for the Linux FireWire stack (Juju)