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Viewing changes to drivers/media/video/usbvision/usbvision-core.c

  • Committer: Bazaar Package Importer
  • Author(s): Amit Kucheria, Amit Kucheria
  • Date: 2010-03-10 02:28:15 UTC
  • Revision ID: james.westby@ubuntu.com-20100310022815-7sd3gwvn5kenaq33
Tags: 2.6.33-500.1
[ Amit Kucheria ]

* Initial release of a 2.6.33-based OMAP kernel
* UBUNTU: [Upstream] Fix omap 1-wire driver compilation
* UBUNTU: ubuntu: AppArmor -- update to mainline 2010-03-04

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drivers/media/video/usbvision/usbvision-core.c
 
1
/*
 
2
 * usbvision-core.c - driver for NT100x USB video capture devices
 
3
 *
 
4
 *
 
5
 * Copyright (c) 1999-2005 Joerg Heckenbach <joerg@heckenbach-aw.de>
 
6
 *                         Dwaine Garden <dwainegarden@rogers.com>
 
7
 *
 
8
 * This module is part of usbvision driver project.
 
9
 * Updates to driver completed by Dwaine P. Garden
 
10
 *
 
11
 * This program is free software; you can redistribute it and/or modify
 
12
 * it under the terms of the GNU General Public License as published by
 
13
 * the Free Software Foundation; either version 2 of the License, or
 
14
 * (at your option) any later version.
 
15
 *
 
16
 * This program is distributed in the hope that it will be useful,
 
17
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 
18
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
19
 * GNU General Public License for more details.
 
20
 *
 
21
 * You should have received a copy of the GNU General Public License
 
22
 * along with this program; if not, write to the Free Software
 
23
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
24
 */
 
25
 
 
26
#include <linux/kernel.h>
 
27
#include <linux/list.h>
 
28
#include <linux/timer.h>
 
29
#include <linux/slab.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 <asm/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 adjustCompression = 1;       /* Set the compression to be adaptive */
 
57
module_param(adjustCompression, int, 0444);
 
58
MODULE_PARM_DESC(adjustCompression, " 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 SwitchSVideoInput;
 
63
module_param(SwitchSVideoInput, int, 0444);
 
64
MODULE_PARM_DESC(SwitchSVideoInput, " 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("%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
        if (len < 0) {
 
190
                len += scratch_buf_size;
 
191
        }
 
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
        }
 
205
        if (free) {
 
206
                free -= 1;                                                      /* at least one byte in the buffer must */
 
207
                                                                                /* left blank, otherwise there is no chance to differ between full and empty */
 
208
        }
 
209
        PDEBUG(DBG_SCRATCH, "return %d\n", free);
 
210
 
 
211
        return free;
 
212
}
 
213
 
 
214
 
 
215
/* This puts data into the buffer */
 
216
static int scratch_put(struct usb_usbvision *usbvision, unsigned char *data,
 
217
                       int len)
 
218
{
 
219
        int len_part;
 
220
 
 
221
        if (usbvision->scratch_write_ptr + len < scratch_buf_size) {
 
222
                memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len);
 
223
                usbvision->scratch_write_ptr += len;
 
224
        }
 
225
        else {
 
226
                len_part = scratch_buf_size - usbvision->scratch_write_ptr;
 
227
                memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len_part);
 
228
                if (len == len_part) {
 
229
                        usbvision->scratch_write_ptr = 0;                       /* just set write_ptr to zero */
 
230
                }
 
231
                else {
 
232
                        memcpy(usbvision->scratch, data + len_part, len - len_part);
 
233
                        usbvision->scratch_write_ptr = len - len_part;
 
234
                }
 
235
        }
 
236
 
 
237
        PDEBUG(DBG_SCRATCH, "len=%d, new write_ptr=%d\n", len, usbvision->scratch_write_ptr);
 
238
 
 
239
        return len;
 
240
}
 
241
 
 
242
/* This marks the write_ptr as position of new frame header */
 
243
static void scratch_mark_header(struct usb_usbvision *usbvision)
 
244
{
 
245
        PDEBUG(DBG_SCRATCH, "header at write_ptr=%d\n", usbvision->scratch_headermarker_write_ptr);
 
246
 
 
247
        usbvision->scratch_headermarker[usbvision->scratch_headermarker_write_ptr] =
 
248
                                usbvision->scratch_write_ptr;
 
249
        usbvision->scratch_headermarker_write_ptr += 1;
 
250
        usbvision->scratch_headermarker_write_ptr %= USBVISION_NUM_HEADERMARKER;
 
251
}
 
252
 
 
253
/* This gets data from the buffer at the given "ptr" position */
 
254
static int scratch_get_extra(struct usb_usbvision *usbvision,
 
255
                             unsigned char *data, int *ptr, int len)
 
256
{
 
257
        int len_part;
 
258
        if (*ptr + len < scratch_buf_size) {
 
259
                memcpy(data, usbvision->scratch + *ptr, len);
 
260
                *ptr += len;
 
261
        }
 
262
        else {
 
263
                len_part = scratch_buf_size - *ptr;
 
264
                memcpy(data, usbvision->scratch + *ptr, len_part);
 
265
                if (len == len_part) {
 
266
                        *ptr = 0;                                                       /* just set the y_ptr to zero */
 
267
                }
 
268
                else {
 
269
                        memcpy(data + len_part, usbvision->scratch, len - len_part);
 
270
                        *ptr = len - len_part;
 
271
                }
 
272
        }
 
273
 
 
274
        PDEBUG(DBG_SCRATCH, "len=%d, new ptr=%d\n", len, *ptr);
 
275
 
 
276
        return len;
 
277
}
 
278
 
 
279
 
 
280
/* This sets the scratch extra read pointer */
 
281
static void scratch_set_extra_ptr(struct usb_usbvision *usbvision, int *ptr,
 
282
                                  int len)
 
283
{
 
284
        *ptr = (usbvision->scratch_read_ptr + len)%scratch_buf_size;
 
285
 
 
286
        PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
 
287
}
 
288
 
 
289
 
 
290
/*This increments the scratch extra read pointer */
 
291
static void scratch_inc_extra_ptr(int *ptr, int len)
 
292
{
 
293
        *ptr = (*ptr + len) % scratch_buf_size;
 
294
 
 
295
        PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
 
296
}
 
297
 
 
298
 
 
299
/* This gets data from the buffer */
 
300
static int scratch_get(struct usb_usbvision *usbvision, unsigned char *data,
 
301
                       int len)
 
302
{
 
303
        int len_part;
 
304
        if (usbvision->scratch_read_ptr + len < scratch_buf_size) {
 
305
                memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len);
 
306
                usbvision->scratch_read_ptr += len;
 
307
        }
 
308
        else {
 
309
                len_part = scratch_buf_size - usbvision->scratch_read_ptr;
 
310
                memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len_part);
 
311
                if (len == len_part) {
 
312
                        usbvision->scratch_read_ptr = 0;                                /* just set the read_ptr to zero */
 
313
                }
 
314
                else {
 
315
                        memcpy(data + len_part, usbvision->scratch, len - len_part);
 
316
                        usbvision->scratch_read_ptr = len - len_part;
 
317
                }
 
318
        }
 
319
 
 
320
        PDEBUG(DBG_SCRATCH, "len=%d, new read_ptr=%d\n", len, usbvision->scratch_read_ptr);
 
321
 
 
322
        return len;
 
323
}
 
324
 
 
325
 
 
326
/* This sets read pointer to next header and returns it */
 
327
static int scratch_get_header(struct usb_usbvision *usbvision,
 
328
                              struct usbvision_frame_header *header)
 
329
{
 
330
        int errCode = 0;
 
331
 
 
332
        PDEBUG(DBG_SCRATCH, "from read_ptr=%d", usbvision->scratch_headermarker_read_ptr);
 
333
 
 
334
        while (usbvision->scratch_headermarker_write_ptr -
 
335
                usbvision->scratch_headermarker_read_ptr != 0) {
 
336
                usbvision->scratch_read_ptr =
 
337
                        usbvision->scratch_headermarker[usbvision->scratch_headermarker_read_ptr];
 
338
                usbvision->scratch_headermarker_read_ptr += 1;
 
339
                usbvision->scratch_headermarker_read_ptr %= USBVISION_NUM_HEADERMARKER;
 
340
                scratch_get(usbvision, (unsigned char *)header, USBVISION_HEADER_LENGTH);
 
341
                if ((header->magic_1 == USBVISION_MAGIC_1)
 
342
                         && (header->magic_2 == USBVISION_MAGIC_2)
 
343
                         && (header->headerLength == USBVISION_HEADER_LENGTH)) {
 
344
                        errCode = USBVISION_HEADER_LENGTH;
 
345
                        header->frameWidth  = header->frameWidthLo  + (header->frameWidthHi << 8);
 
346
                        header->frameHeight = header->frameHeightLo + (header->frameHeightHi << 8);
 
347
                        break;
 
348
                }
 
349
        }
 
350
 
 
351
        return errCode;
 
352
}
 
353
 
 
354
 
 
355
/*This removes len bytes of old data from the buffer */
 
356
static void scratch_rm_old(struct usb_usbvision *usbvision, int len)
 
357
{
 
358
 
 
359
        usbvision->scratch_read_ptr += len;
 
360
        usbvision->scratch_read_ptr %= scratch_buf_size;
 
361
        PDEBUG(DBG_SCRATCH, "read_ptr is now %d\n", usbvision->scratch_read_ptr);
 
362
}
 
363
 
 
364
 
 
365
/*This resets the buffer - kills all data in it too */
 
366
static void scratch_reset(struct usb_usbvision *usbvision)
 
367
{
 
368
        PDEBUG(DBG_SCRATCH, "\n");
 
369
 
 
370
        usbvision->scratch_read_ptr = 0;
 
371
        usbvision->scratch_write_ptr = 0;
 
372
        usbvision->scratch_headermarker_read_ptr = 0;
 
373
        usbvision->scratch_headermarker_write_ptr = 0;
 
374
        usbvision->isocstate = IsocState_NoFrame;
 
375
}
 
376
 
 
377
int usbvision_scratch_alloc(struct usb_usbvision *usbvision)
 
378
{
 
379
        usbvision->scratch = vmalloc_32(scratch_buf_size);
 
380
        scratch_reset(usbvision);
 
381
        if(usbvision->scratch == NULL) {
 
382
                dev_err(&usbvision->dev->dev,
 
383
                        "%s: unable to allocate %d bytes for scratch\n",
 
384
                                __func__, scratch_buf_size);
 
385
                return -ENOMEM;
 
386
        }
 
387
        return 0;
 
388
}
 
389
 
 
390
void usbvision_scratch_free(struct usb_usbvision *usbvision)
 
391
{
 
392
        vfree(usbvision->scratch);
 
393
        usbvision->scratch = NULL;
 
394
 
 
395
}
 
396
 
 
397
/*
 
398
 * usbvision_testpattern()
 
399
 *
 
400
 * Procedure forms a test pattern (yellow grid on blue background).
 
401
 *
 
402
 * Parameters:
 
403
 * fullframe:   if TRUE then entire frame is filled, otherwise the procedure
 
404
 *              continues from the current scanline.
 
405
 * pmode        0: fill the frame with solid blue color (like on VCR or TV)
 
406
 *              1: Draw a colored grid
 
407
 *
 
408
 */
 
409
static void usbvision_testpattern(struct usb_usbvision *usbvision,
 
410
                                  int fullframe, int pmode)
 
411
{
 
412
        static const char proc[] = "usbvision_testpattern";
 
413
        struct usbvision_frame *frame;
 
414
        unsigned char *f;
 
415
        int num_cell = 0;
 
416
        int scan_length = 0;
 
417
        static int num_pass;
 
418
 
 
419
        if (usbvision == NULL) {
 
420
                printk(KERN_ERR "%s: usbvision == NULL\n", proc);
 
421
                return;
 
422
        }
 
423
        if (usbvision->curFrame == NULL) {
 
424
                printk(KERN_ERR "%s: usbvision->curFrame is NULL.\n", proc);
 
425
                return;
 
426
        }
 
427
 
 
428
        /* Grab the current frame */
 
429
        frame = usbvision->curFrame;
 
430
 
 
431
        /* Optionally start at the beginning */
 
432
        if (fullframe) {
 
433
                frame->curline = 0;
 
434
                frame->scanlength = 0;
 
435
        }
 
436
 
 
437
        /* Form every scan line */
 
438
        for (; frame->curline < frame->frmheight; frame->curline++) {
 
439
                int i;
 
440
 
 
441
                f = frame->data + (usbvision->curwidth * 3 * frame->curline);
 
442
                for (i = 0; i < usbvision->curwidth; i++) {
 
443
                        unsigned char cb = 0x80;
 
444
                        unsigned char cg = 0;
 
445
                        unsigned char cr = 0;
 
446
 
 
447
                        if (pmode == 1) {
 
448
                                if (frame->curline % 32 == 0)
 
449
                                        cb = 0, cg = cr = 0xFF;
 
450
                                else if (i % 32 == 0) {
 
451
                                        if (frame->curline % 32 == 1)
 
452
                                                num_cell++;
 
453
                                        cb = 0, cg = cr = 0xFF;
 
454
                                } else {
 
455
                                        cb =
 
456
                                            ((num_cell * 7) +
 
457
                                             num_pass) & 0xFF;
 
458
                                        cg =
 
459
                                            ((num_cell * 5) +
 
460
                                             num_pass * 2) & 0xFF;
 
461
                                        cr =
 
462
                                            ((num_cell * 3) +
 
463
                                             num_pass * 3) & 0xFF;
 
464
                                }
 
465
                        } else {
 
466
                                /* Just the blue screen */
 
467
                        }
 
468
 
 
469
                        *f++ = cb;
 
470
                        *f++ = cg;
 
471
                        *f++ = cr;
 
472
                        scan_length += 3;
 
473
                }
 
474
        }
 
475
 
 
476
        frame->grabstate = FrameState_Done;
 
477
        frame->scanlength += scan_length;
 
478
        ++num_pass;
 
479
 
 
480
}
 
481
 
 
482
/*
 
483
 * usbvision_decompress_alloc()
 
484
 *
 
485
 * allocates intermediate buffer for decompression
 
486
 */
 
487
int usbvision_decompress_alloc(struct usb_usbvision *usbvision)
 
488
{
 
489
        int IFB_size = MAX_FRAME_WIDTH * MAX_FRAME_HEIGHT * 3 / 2;
 
490
        usbvision->IntraFrameBuffer = vmalloc_32(IFB_size);
 
491
        if (usbvision->IntraFrameBuffer == NULL) {
 
492
                dev_err(&usbvision->dev->dev,
 
493
                        "%s: unable to allocate %d for compr. frame buffer\n",
 
494
                                __func__, IFB_size);
 
495
                return -ENOMEM;
 
496
        }
 
497
        return 0;
 
498
}
 
499
 
 
500
/*
 
501
 * usbvision_decompress_free()
 
502
 *
 
503
 * frees intermediate buffer for decompression
 
504
 */
 
505
void usbvision_decompress_free(struct usb_usbvision *usbvision)
 
506
{
 
507
        vfree(usbvision->IntraFrameBuffer);
 
508
        usbvision->IntraFrameBuffer = NULL;
 
509
 
 
510
}
 
511
 
 
512
/************************************************************
 
513
 * Here comes the data parsing stuff that is run as interrupt
 
514
 ************************************************************/
 
515
/*
 
516
 * usbvision_find_header()
 
517
 *
 
518
 * Locate one of supported header markers in the scratch buffer.
 
519
 */
 
520
static enum ParseState usbvision_find_header(struct usb_usbvision *usbvision)
 
521
{
 
522
        struct usbvision_frame *frame;
 
523
        int foundHeader = 0;
 
524
 
 
525
        frame = usbvision->curFrame;
 
526
 
 
527
        while (scratch_get_header(usbvision, &frame->isocHeader) == USBVISION_HEADER_LENGTH) {
 
528
                // found header in scratch
 
529
                PDEBUG(DBG_HEADER, "found header: 0x%02x%02x %d %d %d %d %#x 0x%02x %u %u",
 
530
                                frame->isocHeader.magic_2,
 
531
                                frame->isocHeader.magic_1,
 
532
                                frame->isocHeader.headerLength,
 
533
                                frame->isocHeader.frameNum,
 
534
                                frame->isocHeader.framePhase,
 
535
                                frame->isocHeader.frameLatency,
 
536
                                frame->isocHeader.dataFormat,
 
537
                                frame->isocHeader.formatParam,
 
538
                                frame->isocHeader.frameWidth,
 
539
                                frame->isocHeader.frameHeight);
 
540
 
 
541
                if (usbvision->requestIntra) {
 
542
                        if (frame->isocHeader.formatParam & 0x80) {
 
543
                                foundHeader = 1;
 
544
                                usbvision->lastIsocFrameNum = -1; // do not check for lost frames this time
 
545
                                usbvision_unrequest_intra(usbvision);
 
546
                                break;
 
547
                        }
 
548
                }
 
549
                else {
 
550
                        foundHeader = 1;
 
551
                        break;
 
552
                }
 
553
        }
 
554
 
 
555
        if (foundHeader) {
 
556
                frame->frmwidth = frame->isocHeader.frameWidth * usbvision->stretch_width;
 
557
                frame->frmheight = frame->isocHeader.frameHeight * usbvision->stretch_height;
 
558
                frame->v4l2_linesize = (frame->frmwidth * frame->v4l2_format.depth)>> 3;
 
559
        }
 
560
        else { // no header found
 
561
                PDEBUG(DBG_HEADER, "skipping scratch data, no header");
 
562
                scratch_reset(usbvision);
 
563
                return ParseState_EndParse;
 
564
        }
 
565
 
 
566
        // found header
 
567
        if (frame->isocHeader.dataFormat==ISOC_MODE_COMPRESS) {
 
568
                //check isocHeader.frameNum for lost frames
 
569
                if (usbvision->lastIsocFrameNum >= 0) {
 
570
                        if (((usbvision->lastIsocFrameNum + 1) % 32) != frame->isocHeader.frameNum) {
 
571
                                // unexpected frame drop: need to request new intra frame
 
572
                                PDEBUG(DBG_HEADER, "Lost frame before %d on USB", frame->isocHeader.frameNum);
 
573
                                usbvision_request_intra(usbvision);
 
574
                                return ParseState_NextFrame;
 
575
                        }
 
576
                }
 
577
                usbvision->lastIsocFrameNum = frame->isocHeader.frameNum;
 
578
        }
 
579
        usbvision->header_count++;
 
580
        frame->scanstate = ScanState_Lines;
 
581
        frame->curline = 0;
 
582
 
 
583
        if (force_testpattern) {
 
584
                usbvision_testpattern(usbvision, 1, 1);
 
585
                return ParseState_NextFrame;
 
586
        }
 
587
        return ParseState_Continue;
 
588
}
 
589
 
 
590
static enum ParseState usbvision_parse_lines_422(struct usb_usbvision *usbvision,
 
591
                                           long *pcopylen)
 
592
{
 
593
        volatile struct usbvision_frame *frame;
 
594
        unsigned char *f;
 
595
        int len;
 
596
        int i;
 
597
        unsigned char yuyv[4]={180, 128, 10, 128}; // YUV components
 
598
        unsigned char rv, gv, bv;       // RGB components
 
599
        int clipmask_index, bytes_per_pixel;
 
600
        int stretch_bytes, clipmask_add;
 
601
 
 
602
        frame  = usbvision->curFrame;
 
603
        f = frame->data + (frame->v4l2_linesize * frame->curline);
 
604
 
 
605
        /* Make sure there's enough data for the entire line */
 
606
        len = (frame->isocHeader.frameWidth * 2)+5;
 
607
        if (scratch_len(usbvision) < len) {
 
608
                PDEBUG(DBG_PARSE, "out of data in line %d, need %u.\n", frame->curline, len);
 
609
                return ParseState_Out;
 
610
        }
 
611
 
 
612
        if ((frame->curline + 1) >= frame->frmheight) {
 
613
                return ParseState_NextFrame;
 
614
        }
 
615
 
 
616
        bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
 
617
        stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
 
618
        clipmask_index = frame->curline * MAX_FRAME_WIDTH;
 
619
        clipmask_add = usbvision->stretch_width;
 
620
 
 
621
        for (i = 0; i < frame->frmwidth; i+=(2 * usbvision->stretch_width)) {
 
622
 
 
623
                scratch_get(usbvision, &yuyv[0], 4);
 
624
 
 
625
                if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
 
626
                        *f++ = yuyv[0]; // Y
 
627
                        *f++ = yuyv[3]; // U
 
628
                }
 
629
                else {
 
630
 
 
631
                        YUV_TO_RGB_BY_THE_BOOK(yuyv[0], yuyv[1], yuyv[3], rv, gv, bv);
 
632
                        switch (frame->v4l2_format.format) {
 
633
                        case V4L2_PIX_FMT_RGB565:
 
634
                                *f++ = (0x1F & rv) |
 
635
                                        (0xE0 & (gv << 5));
 
636
                                *f++ = (0x07 & (gv >> 3)) |
 
637
                                        (0xF8 &  bv);
 
638
                                break;
 
639
                        case V4L2_PIX_FMT_RGB24:
 
640
                                *f++ = rv;
 
641
                                *f++ = gv;
 
642
                                *f++ = bv;
 
643
                                break;
 
644
                        case V4L2_PIX_FMT_RGB32:
 
645
                                *f++ = rv;
 
646
                                *f++ = gv;
 
647
                                *f++ = bv;
 
648
                                f++;
 
649
                                break;
 
650
                        case V4L2_PIX_FMT_RGB555:
 
651
                                *f++ = (0x1F & rv) |
 
652
                                        (0xE0 & (gv << 5));
 
653
                                *f++ = (0x03 & (gv >> 3)) |
 
654
                                        (0x7C & (bv << 2));
 
655
                                break;
 
656
                        }
 
657
                }
 
658
                clipmask_index += clipmask_add;
 
659
                f += stretch_bytes;
 
660
 
 
661
                if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
 
662
                        *f++ = yuyv[2]; // Y
 
663
                        *f++ = yuyv[1]; // V
 
664
                }
 
665
                else {
 
666
 
 
667
                        YUV_TO_RGB_BY_THE_BOOK(yuyv[2], yuyv[1], yuyv[3], rv, gv, bv);
 
668
                        switch (frame->v4l2_format.format) {
 
669
                        case V4L2_PIX_FMT_RGB565:
 
670
                                *f++ = (0x1F & rv) |
 
671
                                        (0xE0 & (gv << 5));
 
672
                                *f++ = (0x07 & (gv >> 3)) |
 
673
                                        (0xF8 &  bv);
 
674
                                break;
 
675
                        case V4L2_PIX_FMT_RGB24:
 
676
                                *f++ = rv;
 
677
                                *f++ = gv;
 
678
                                *f++ = bv;
 
679
                                break;
 
680
                        case V4L2_PIX_FMT_RGB32:
 
681
                                *f++ = rv;
 
682
                                *f++ = gv;
 
683
                                *f++ = bv;
 
684
                                f++;
 
685
                                break;
 
686
                        case V4L2_PIX_FMT_RGB555:
 
687
                                *f++ = (0x1F & rv) |
 
688
                                        (0xE0 & (gv << 5));
 
689
                                *f++ = (0x03 & (gv >> 3)) |
 
690
                                        (0x7C & (bv << 2));
 
691
                                break;
 
692
                        }
 
693
                }
 
694
                clipmask_index += clipmask_add;
 
695
                f += stretch_bytes;
 
696
        }
 
697
 
 
698
        frame->curline += usbvision->stretch_height;
 
699
        *pcopylen += frame->v4l2_linesize * usbvision->stretch_height;
 
700
 
 
701
        if (frame->curline >= frame->frmheight) {
 
702
                return ParseState_NextFrame;
 
703
        }
 
704
        else {
 
705
                return ParseState_Continue;
 
706
        }
 
707
}
 
708
 
 
709
/* The decompression routine  */
 
710
static int usbvision_decompress(struct usb_usbvision *usbvision,unsigned char *Compressed,
 
711
                                                                unsigned char *Decompressed, int *StartPos,
 
712
                                                                int *BlockTypeStartPos, int Len)
 
713
{
 
714
        int RestPixel, Idx, MaxPos, Pos, ExtraPos, BlockLen, BlockTypePos, BlockTypeLen;
 
715
        unsigned char BlockByte, BlockCode, BlockType, BlockTypeByte, Integrator;
 
716
 
 
717
        Integrator = 0;
 
718
        Pos = *StartPos;
 
719
        BlockTypePos = *BlockTypeStartPos;
 
720
        MaxPos = 396; //Pos + Len;
 
721
        ExtraPos = Pos;
 
722
        BlockLen = 0;
 
723
        BlockByte = 0;
 
724
        BlockCode = 0;
 
725
        BlockType = 0;
 
726
        BlockTypeByte = 0;
 
727
        BlockTypeLen = 0;
 
728
        RestPixel = Len;
 
729
 
 
730
        for (Idx = 0; Idx < Len; Idx++) {
 
731
 
 
732
                if (BlockLen == 0) {
 
733
                        if (BlockTypeLen==0) {
 
734
                                BlockTypeByte = Compressed[BlockTypePos];
 
735
                                BlockTypePos++;
 
736
                                BlockTypeLen = 4;
 
737
                        }
 
738
                        BlockType = (BlockTypeByte & 0xC0) >> 6;
 
739
 
 
740
                        //statistic:
 
741
                        usbvision->ComprBlockTypes[BlockType]++;
 
742
 
 
743
                        Pos = ExtraPos;
 
744
                        if (BlockType == 0) {
 
745
                                if(RestPixel >= 24) {
 
746
                                        Idx += 23;
 
747
                                        RestPixel -= 24;
 
748
                                        Integrator = Decompressed[Idx];
 
749
                                } else {
 
750
                                        Idx += RestPixel - 1;
 
751
                                        RestPixel = 0;
 
752
                                }
 
753
                        } else {
 
754
                                BlockCode = Compressed[Pos];
 
755
                                Pos++;
 
756
                                if (RestPixel >= 24) {
 
757
                                        BlockLen  = 24;
 
758
                                } else {
 
759
                                        BlockLen = RestPixel;
 
760
                                }
 
761
                                RestPixel -= BlockLen;
 
762
                                ExtraPos = Pos + (BlockLen / 4);
 
763
                        }
 
764
                        BlockTypeByte <<= 2;
 
765
                        BlockTypeLen -= 1;
 
766
                }
 
767
                if (BlockLen > 0) {
 
768
                        if ((BlockLen%4) == 0) {
 
769
                                BlockByte = Compressed[Pos];
 
770
                                Pos++;
 
771
                        }
 
772
                        if (BlockType == 1) { //inter Block
 
773
                                Integrator = Decompressed[Idx];
 
774
                        }
 
775
                        switch (BlockByte & 0xC0) {
 
776
                                case 0x03<<6:
 
777
                                        Integrator += Compressed[ExtraPos];
 
778
                                        ExtraPos++;
 
779
                                        break;
 
780
                                case 0x02<<6:
 
781
                                        Integrator += BlockCode;
 
782
                                        break;
 
783
                                case 0x00:
 
784
                                        Integrator -= BlockCode;
 
785
                                        break;
 
786
                        }
 
787
                        Decompressed[Idx] = Integrator;
 
788
                        BlockByte <<= 2;
 
789
                        BlockLen -= 1;
 
790
                }
 
791
        }
 
792
        *StartPos = ExtraPos;
 
793
        *BlockTypeStartPos = BlockTypePos;
 
794
        return Idx;
 
795
}
 
796
 
 
797
 
 
798
/*
 
799
 * usbvision_parse_compress()
 
800
 *
 
801
 * Parse compressed frame from the scratch buffer, put
 
802
 * decoded RGB value into the current frame buffer and add the written
 
803
 * number of bytes (RGB) to the *pcopylen.
 
804
 *
 
805
 */
 
806
static enum ParseState usbvision_parse_compress(struct usb_usbvision *usbvision,
 
807
                                           long *pcopylen)
 
808
{
 
809
#define USBVISION_STRIP_MAGIC           0x5A
 
810
#define USBVISION_STRIP_LEN_MAX         400
 
811
#define USBVISION_STRIP_HEADER_LEN      3
 
812
 
 
813
        struct usbvision_frame *frame;
 
814
        unsigned char *f,*u = NULL ,*v = NULL;
 
815
        unsigned char StripData[USBVISION_STRIP_LEN_MAX];
 
816
        unsigned char StripHeader[USBVISION_STRIP_HEADER_LEN];
 
817
        int Idx, IdxEnd, StripLen, StripPtr, StartBlockPos, BlockPos, BlockTypePos;
 
818
        int clipmask_index, bytes_per_pixel, rc;
 
819
        int imageSize;
 
820
        unsigned char rv, gv, bv;
 
821
        static unsigned char *Y, *U, *V;
 
822
 
 
823
        frame  = usbvision->curFrame;
 
824
        imageSize = frame->frmwidth * frame->frmheight;
 
825
        if ( (frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) ||
 
826
             (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) ) {       // this is a planar format
 
827
                //... v4l2_linesize not used here.
 
828
                f = frame->data + (frame->width * frame->curline);
 
829
        } else
 
830
                f = frame->data + (frame->v4l2_linesize * frame->curline);
 
831
 
 
832
        if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV){ //initialise u and v pointers
 
833
                // get base of u and b planes add halfoffset
 
834
 
 
835
                u = frame->data
 
836
                        + imageSize
 
837
                        + (frame->frmwidth >>1) * frame->curline ;
 
838
                v = u + (imageSize >>1 );
 
839
 
 
840
        } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420){
 
841
 
 
842
                v = frame->data + imageSize + ((frame->curline* (frame->width))>>2) ;
 
843
                u = v + (imageSize >>2) ;
 
844
        }
 
845
 
 
846
        if (frame->curline == 0) {
 
847
                usbvision_adjust_compression(usbvision);
 
848
        }
 
849
 
 
850
        if (scratch_len(usbvision) < USBVISION_STRIP_HEADER_LEN) {
 
851
                return ParseState_Out;
 
852
        }
 
853
 
 
854
        //get strip header without changing the scratch_read_ptr
 
855
        scratch_set_extra_ptr(usbvision, &StripPtr, 0);
 
856
        scratch_get_extra(usbvision, &StripHeader[0], &StripPtr,
 
857
                                USBVISION_STRIP_HEADER_LEN);
 
858
 
 
859
        if (StripHeader[0] != USBVISION_STRIP_MAGIC) {
 
860
                // wrong strip magic
 
861
                usbvision->stripMagicErrors++;
 
862
                return ParseState_NextFrame;
 
863
        }
 
864
 
 
865
        if (frame->curline != (int)StripHeader[2]) {
 
866
                //line number missmatch error
 
867
                usbvision->stripLineNumberErrors++;
 
868
        }
 
869
 
 
870
        StripLen = 2 * (unsigned int)StripHeader[1];
 
871
        if (StripLen > USBVISION_STRIP_LEN_MAX) {
 
872
                // strip overrun
 
873
                // I think this never happens
 
874
                usbvision_request_intra(usbvision);
 
875
        }
 
876
 
 
877
        if (scratch_len(usbvision) < StripLen) {
 
878
                //there is not enough data for the strip
 
879
                return ParseState_Out;
 
880
        }
 
881
 
 
882
        if (usbvision->IntraFrameBuffer) {
 
883
                Y = usbvision->IntraFrameBuffer + frame->frmwidth * frame->curline;
 
884
                U = usbvision->IntraFrameBuffer + imageSize + (frame->frmwidth / 2) * (frame->curline / 2);
 
885
                V = usbvision->IntraFrameBuffer + imageSize / 4 * 5 + (frame->frmwidth / 2) * (frame->curline / 2);
 
886
        }
 
887
        else {
 
888
                return ParseState_NextFrame;
 
889
        }
 
890
 
 
891
        bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
 
892
        clipmask_index = frame->curline * MAX_FRAME_WIDTH;
 
893
 
 
894
        scratch_get(usbvision, StripData, StripLen);
 
895
 
 
896
        IdxEnd = frame->frmwidth;
 
897
        BlockTypePos = USBVISION_STRIP_HEADER_LEN;
 
898
        StartBlockPos = BlockTypePos + (IdxEnd - 1) / 96 + (IdxEnd / 2 - 1) / 96 + 2;
 
899
        BlockPos = StartBlockPos;
 
900
 
 
901
        usbvision->BlockPos = BlockPos;
 
902
 
 
903
        if ((rc = usbvision_decompress(usbvision, StripData, Y, &BlockPos, &BlockTypePos, IdxEnd)) != IdxEnd) {
 
904
                //return ParseState_Continue;
 
905
        }
 
906
        if (StripLen > usbvision->maxStripLen) {
 
907
                usbvision->maxStripLen = StripLen;
 
908
        }
 
909
 
 
910
        if (frame->curline%2) {
 
911
                if ((rc = usbvision_decompress(usbvision, StripData, V, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) {
 
912
                //return ParseState_Continue;
 
913
                }
 
914
        }
 
915
        else {
 
916
                if ((rc = usbvision_decompress(usbvision, StripData, U, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) {
 
917
                        //return ParseState_Continue;
 
918
                }
 
919
        }
 
920
 
 
921
        if (BlockPos > usbvision->comprBlockPos) {
 
922
                usbvision->comprBlockPos = BlockPos;
 
923
        }
 
924
        if (BlockPos > StripLen) {
 
925
                usbvision->stripLenErrors++;
 
926
        }
 
927
 
 
928
        for (Idx = 0; Idx < IdxEnd; Idx++) {
 
929
                if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
 
930
                        *f++ = Y[Idx];
 
931
                        *f++ = Idx & 0x01 ? U[Idx/2] : V[Idx/2];
 
932
                }
 
933
                else if(frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) {
 
934
                        *f++ = Y[Idx];
 
935
                        if ( Idx & 0x01)
 
936
                                *u++ = U[Idx>>1] ;
 
937
                        else
 
938
                                *v++ = V[Idx>>1];
 
939
                }
 
940
                else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) {
 
941
                        *f++ = Y [Idx];
 
942
                        if ( !((  Idx & 0x01  ) | (  frame->curline & 0x01  )) ){
 
943
 
 
944
/*                               only need do this for 1 in 4 pixels */
 
945
/*                               intraframe buffer is YUV420 format */
 
946
 
 
947
                                *u++ = U[Idx >>1];
 
948
                                *v++ = V[Idx >>1];
 
949
                        }
 
950
 
 
951
                }
 
952
                else {
 
953
                        YUV_TO_RGB_BY_THE_BOOK(Y[Idx], U[Idx/2], V[Idx/2], rv, gv, bv);
 
954
                        switch (frame->v4l2_format.format) {
 
955
                                case V4L2_PIX_FMT_GREY:
 
956
                                        *f++ = Y[Idx];
 
957
                                        break;
 
958
                                case V4L2_PIX_FMT_RGB555:
 
959
                                        *f++ = (0x1F & rv) |
 
960
                                                (0xE0 & (gv << 5));
 
961
                                        *f++ = (0x03 & (gv >> 3)) |
 
962
                                                (0x7C & (bv << 2));
 
963
                                        break;
 
964
                                case V4L2_PIX_FMT_RGB565:
 
965
                                        *f++ = (0x1F & rv) |
 
966
                                                (0xE0 & (gv << 5));
 
967
                                        *f++ = (0x07 & (gv >> 3)) |
 
968
                                                (0xF8 &  bv);
 
969
                                        break;
 
970
                                case V4L2_PIX_FMT_RGB24:
 
971
                                        *f++ = rv;
 
972
                                        *f++ = gv;
 
973
                                        *f++ = bv;
 
974
                                        break;
 
975
                                case V4L2_PIX_FMT_RGB32:
 
976
                                        *f++ = rv;
 
977
                                        *f++ = gv;
 
978
                                        *f++ = bv;
 
979
                                        f++;
 
980
                                        break;
 
981
                        }
 
982
                }
 
983
                clipmask_index++;
 
984
        }
 
985
        /* Deal with non-integer no. of bytes for YUV420P */
 
986
        if (frame->v4l2_format.format != V4L2_PIX_FMT_YVU420 )
 
987
                *pcopylen += frame->v4l2_linesize;
 
988
        else
 
989
                *pcopylen += frame->curline & 0x01 ? frame->v4l2_linesize : frame->v4l2_linesize << 1;
 
990
 
 
991
        frame->curline += 1;
 
992
 
 
993
        if (frame->curline >= frame->frmheight) {
 
994
                return ParseState_NextFrame;
 
995
        }
 
996
        else {
 
997
                return ParseState_Continue;
 
998
        }
 
999
 
 
1000
}
 
1001
 
 
1002
 
 
1003
/*
 
1004
 * usbvision_parse_lines_420()
 
1005
 *
 
1006
 * Parse two lines from the scratch buffer, put
 
1007
 * decoded RGB value into the current frame buffer and add the written
 
1008
 * number of bytes (RGB) to the *pcopylen.
 
1009
 *
 
1010
 */
 
1011
static enum ParseState usbvision_parse_lines_420(struct usb_usbvision *usbvision,
 
1012
                                           long *pcopylen)
 
1013
{
 
1014
        struct usbvision_frame *frame;
 
1015
        unsigned char *f_even = NULL, *f_odd = NULL;
 
1016
        unsigned int pixel_per_line, block;
 
1017
        int pixel, block_split;
 
1018
        int y_ptr, u_ptr, v_ptr, y_odd_offset;
 
1019
        const int   y_block_size = 128;
 
1020
        const int  uv_block_size = 64;
 
1021
        const int sub_block_size = 32;
 
1022
        const int y_step[] = { 0, 0, 0, 2 },  y_step_size = 4;
 
1023
        const int uv_step[]= { 0, 0, 0, 4 }, uv_step_size = 4;
 
1024
        unsigned char y[2], u, v;       /* YUV components */
 
1025
        int y_, u_, v_, vb, uvg, ur;
 
1026
        int r_, g_, b_;                 /* RGB components */
 
1027
        unsigned char g;
 
1028
        int clipmask_even_index, clipmask_odd_index, bytes_per_pixel;
 
1029
        int clipmask_add, stretch_bytes;
 
1030
 
 
1031
        frame  = usbvision->curFrame;
 
1032
        f_even = frame->data + (frame->v4l2_linesize * frame->curline);
 
1033
        f_odd  = f_even + frame->v4l2_linesize * usbvision->stretch_height;
 
1034
 
 
1035
        /* Make sure there's enough data for the entire line */
 
1036
        /* In this mode usbvision transfer 3 bytes for every 2 pixels */
 
1037
        /* I need two lines to decode the color */
 
1038
        bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
 
1039
        stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
 
1040
        clipmask_even_index = frame->curline * MAX_FRAME_WIDTH;
 
1041
        clipmask_odd_index  = clipmask_even_index + MAX_FRAME_WIDTH;
 
1042
        clipmask_add = usbvision->stretch_width;
 
1043
        pixel_per_line = frame->isocHeader.frameWidth;
 
1044
 
 
1045
        if (scratch_len(usbvision) < (int)pixel_per_line * 3) {
 
1046
                //printk(KERN_DEBUG "out of data, need %d\n", len);
 
1047
                return ParseState_Out;
 
1048
        }
 
1049
 
 
1050
        if ((frame->curline + 1) >= frame->frmheight) {
 
1051
                return ParseState_NextFrame;
 
1052
        }
 
1053
 
 
1054
        block_split = (pixel_per_line%y_block_size) ? 1 : 0;    //are some blocks splitted into different lines?
 
1055
 
 
1056
        y_odd_offset = (pixel_per_line / y_block_size) * (y_block_size + uv_block_size)
 
1057
                        + block_split * uv_block_size;
 
1058
 
 
1059
        scratch_set_extra_ptr(usbvision, &y_ptr, y_odd_offset);
 
1060
        scratch_set_extra_ptr(usbvision, &u_ptr, y_block_size);
 
1061
        scratch_set_extra_ptr(usbvision, &v_ptr, y_odd_offset
 
1062
                        + (4 - block_split) * sub_block_size);
 
1063
 
 
1064
        for (block = 0; block < (pixel_per_line / sub_block_size);
 
1065
             block++) {
 
1066
 
 
1067
 
 
1068
                for (pixel = 0; pixel < sub_block_size; pixel +=2) {
 
1069
                        scratch_get(usbvision, &y[0], 2);
 
1070
                        scratch_get_extra(usbvision, &u, &u_ptr, 1);
 
1071
                        scratch_get_extra(usbvision, &v, &v_ptr, 1);
 
1072
 
 
1073
                        //I don't use the YUV_TO_RGB macro for better performance
 
1074
                        v_ = v - 128;
 
1075
                        u_ = u - 128;
 
1076
                        vb =              132252 * v_;
 
1077
                        uvg= -53281 * u_ - 25625 * v_;
 
1078
                        ur = 104595 * u_;
 
1079
 
 
1080
                        if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
 
1081
                                *f_even++ = y[0];
 
1082
                                *f_even++ = v;
 
1083
                        }
 
1084
                        else {
 
1085
                                y_ = 76284 * (y[0] - 16);
 
1086
 
 
1087
                                b_ = (y_ + vb) >> 16;
 
1088
                                g_ = (y_ + uvg)>> 16;
 
1089
                                r_ = (y_ + ur) >> 16;
 
1090
 
 
1091
                                switch (frame->v4l2_format.format) {
 
1092
                                case V4L2_PIX_FMT_RGB565:
 
1093
                                        g = LIMIT_RGB(g_);
 
1094
                                        *f_even++ =
 
1095
                                                (0x1F & LIMIT_RGB(r_)) |
 
1096
                                                (0xE0 & (g << 5));
 
1097
                                        *f_even++ =
 
1098
                                                (0x07 & (g >> 3)) |
 
1099
                                                (0xF8 &  LIMIT_RGB(b_));
 
1100
                                        break;
 
1101
                                case V4L2_PIX_FMT_RGB24:
 
1102
                                        *f_even++ = LIMIT_RGB(r_);
 
1103
                                        *f_even++ = LIMIT_RGB(g_);
 
1104
                                        *f_even++ = LIMIT_RGB(b_);
 
1105
                                        break;
 
1106
                                case V4L2_PIX_FMT_RGB32:
 
1107
                                        *f_even++ = LIMIT_RGB(r_);
 
1108
                                        *f_even++ = LIMIT_RGB(g_);
 
1109
                                        *f_even++ = LIMIT_RGB(b_);
 
1110
                                        f_even++;
 
1111
                                        break;
 
1112
                                case V4L2_PIX_FMT_RGB555:
 
1113
                                        g = LIMIT_RGB(g_);
 
1114
                                        *f_even++ = (0x1F & LIMIT_RGB(r_)) |
 
1115
                                                (0xE0 & (g << 5));
 
1116
                                        *f_even++ = (0x03 & (g >> 3)) |
 
1117
                                                (0x7C & (LIMIT_RGB(b_) << 2));
 
1118
                                        break;
 
1119
                                }
 
1120
                        }
 
1121
                        clipmask_even_index += clipmask_add;
 
1122
                        f_even += stretch_bytes;
 
1123
 
 
1124
                        if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
 
1125
                                *f_even++ = y[1];
 
1126
                                *f_even++ = u;
 
1127
                        }
 
1128
                        else {
 
1129
                                y_ = 76284 * (y[1] - 16);
 
1130
 
 
1131
                                b_ = (y_ + vb) >> 16;
 
1132
                                g_ = (y_ + uvg)>> 16;
 
1133
                                r_ = (y_ + ur) >> 16;
 
1134
 
 
1135
                                switch (frame->v4l2_format.format) {
 
1136
                                case V4L2_PIX_FMT_RGB565:
 
1137
                                        g = LIMIT_RGB(g_);
 
1138
                                        *f_even++ =
 
1139
                                                (0x1F & LIMIT_RGB(r_)) |
 
1140
                                                (0xE0 & (g << 5));
 
1141
                                        *f_even++ =
 
1142
                                                (0x07 & (g >> 3)) |
 
1143
                                                (0xF8 &  LIMIT_RGB(b_));
 
1144
                                        break;
 
1145
                                case V4L2_PIX_FMT_RGB24:
 
1146
                                        *f_even++ = LIMIT_RGB(r_);
 
1147
                                        *f_even++ = LIMIT_RGB(g_);
 
1148
                                        *f_even++ = LIMIT_RGB(b_);
 
1149
                                        break;
 
1150
                                case V4L2_PIX_FMT_RGB32:
 
1151
                                        *f_even++ = LIMIT_RGB(r_);
 
1152
                                        *f_even++ = LIMIT_RGB(g_);
 
1153
                                        *f_even++ = LIMIT_RGB(b_);
 
1154
                                        f_even++;
 
1155
                                        break;
 
1156
                                case V4L2_PIX_FMT_RGB555:
 
1157
                                        g = LIMIT_RGB(g_);
 
1158
                                        *f_even++ = (0x1F & LIMIT_RGB(r_)) |
 
1159
                                                (0xE0 & (g << 5));
 
1160
                                        *f_even++ = (0x03 & (g >> 3)) |
 
1161
                                                (0x7C & (LIMIT_RGB(b_) << 2));
 
1162
                                        break;
 
1163
                                }
 
1164
                        }
 
1165
                        clipmask_even_index += clipmask_add;
 
1166
                        f_even += stretch_bytes;
 
1167
 
 
1168
                        scratch_get_extra(usbvision, &y[0], &y_ptr, 2);
 
1169
 
 
1170
                        if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
 
1171
                                *f_odd++ = y[0];
 
1172
                                *f_odd++ = v;
 
1173
                        }
 
1174
                        else {
 
1175
                                y_ = 76284 * (y[0] - 16);
 
1176
 
 
1177
                                b_ = (y_ + vb) >> 16;
 
1178
                                g_ = (y_ + uvg)>> 16;
 
1179
                                r_ = (y_ + ur) >> 16;
 
1180
 
 
1181
                                switch (frame->v4l2_format.format) {
 
1182
                                case V4L2_PIX_FMT_RGB565:
 
1183
                                        g = LIMIT_RGB(g_);
 
1184
                                        *f_odd++ =
 
1185
                                                (0x1F & LIMIT_RGB(r_)) |
 
1186
                                                (0xE0 & (g << 5));
 
1187
                                        *f_odd++ =
 
1188
                                                (0x07 & (g >> 3)) |
 
1189
                                                (0xF8 &  LIMIT_RGB(b_));
 
1190
                                        break;
 
1191
                                case V4L2_PIX_FMT_RGB24:
 
1192
                                        *f_odd++ = LIMIT_RGB(r_);
 
1193
                                        *f_odd++ = LIMIT_RGB(g_);
 
1194
                                        *f_odd++ = LIMIT_RGB(b_);
 
1195
                                        break;
 
1196
                                case V4L2_PIX_FMT_RGB32:
 
1197
                                        *f_odd++ = LIMIT_RGB(r_);
 
1198
                                        *f_odd++ = LIMIT_RGB(g_);
 
1199
                                        *f_odd++ = LIMIT_RGB(b_);
 
1200
                                        f_odd++;
 
1201
                                        break;
 
1202
                                case V4L2_PIX_FMT_RGB555:
 
1203
                                        g = LIMIT_RGB(g_);
 
1204
                                        *f_odd++ = (0x1F & LIMIT_RGB(r_)) |
 
1205
                                                (0xE0 & (g << 5));
 
1206
                                        *f_odd++ = (0x03 & (g >> 3)) |
 
1207
                                                (0x7C & (LIMIT_RGB(b_) << 2));
 
1208
                                        break;
 
1209
                                }
 
1210
                        }
 
1211
                        clipmask_odd_index += clipmask_add;
 
1212
                        f_odd += stretch_bytes;
 
1213
 
 
1214
                        if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
 
1215
                                *f_odd++ = y[1];
 
1216
                                *f_odd++ = u;
 
1217
                        }
 
1218
                        else {
 
1219
                                y_ = 76284 * (y[1] - 16);
 
1220
 
 
1221
                                b_ = (y_ + vb) >> 16;
 
1222
                                g_ = (y_ + uvg)>> 16;
 
1223
                                r_ = (y_ + ur) >> 16;
 
1224
 
 
1225
                                switch (frame->v4l2_format.format) {
 
1226
                                case V4L2_PIX_FMT_RGB565:
 
1227
                                        g = LIMIT_RGB(g_);
 
1228
                                        *f_odd++ =
 
1229
                                                (0x1F & LIMIT_RGB(r_)) |
 
1230
                                                (0xE0 & (g << 5));
 
1231
                                        *f_odd++ =
 
1232
                                                (0x07 & (g >> 3)) |
 
1233
                                                (0xF8 &  LIMIT_RGB(b_));
 
1234
                                        break;
 
1235
                                case V4L2_PIX_FMT_RGB24:
 
1236
                                        *f_odd++ = LIMIT_RGB(r_);
 
1237
                                        *f_odd++ = LIMIT_RGB(g_);
 
1238
                                        *f_odd++ = LIMIT_RGB(b_);
 
1239
                                        break;
 
1240
                                case V4L2_PIX_FMT_RGB32:
 
1241
                                        *f_odd++ = LIMIT_RGB(r_);
 
1242
                                        *f_odd++ = LIMIT_RGB(g_);
 
1243
                                        *f_odd++ = LIMIT_RGB(b_);
 
1244
                                        f_odd++;
 
1245
                                        break;
 
1246
                                case V4L2_PIX_FMT_RGB555:
 
1247
                                        g = LIMIT_RGB(g_);
 
1248
                                        *f_odd++ = (0x1F & LIMIT_RGB(r_)) |
 
1249
                                                (0xE0 & (g << 5));
 
1250
                                        *f_odd++ = (0x03 & (g >> 3)) |
 
1251
                                                (0x7C & (LIMIT_RGB(b_) << 2));
 
1252
                                        break;
 
1253
                                }
 
1254
                        }
 
1255
                        clipmask_odd_index += clipmask_add;
 
1256
                        f_odd += stretch_bytes;
 
1257
                }
 
1258
 
 
1259
                scratch_rm_old(usbvision,y_step[block % y_step_size] * sub_block_size);
 
1260
                scratch_inc_extra_ptr(&y_ptr, y_step[(block + 2 * block_split) % y_step_size]
 
1261
                                * sub_block_size);
 
1262
                scratch_inc_extra_ptr(&u_ptr, uv_step[block % uv_step_size]
 
1263
                                * sub_block_size);
 
1264
                scratch_inc_extra_ptr(&v_ptr, uv_step[(block + 2 * block_split) % uv_step_size]
 
1265
                                * sub_block_size);
 
1266
        }
 
1267
 
 
1268
        scratch_rm_old(usbvision, pixel_per_line * 3 / 2
 
1269
                        + block_split * sub_block_size);
 
1270
 
 
1271
        frame->curline += 2 * usbvision->stretch_height;
 
1272
        *pcopylen += frame->v4l2_linesize * 2 * usbvision->stretch_height;
 
1273
 
 
1274
        if (frame->curline >= frame->frmheight)
 
1275
                return ParseState_NextFrame;
 
1276
        else
 
1277
                return ParseState_Continue;
 
1278
}
 
1279
 
 
1280
/*
 
1281
 * usbvision_parse_data()
 
1282
 *
 
1283
 * Generic routine to parse the scratch buffer. It employs either
 
1284
 * usbvision_find_header() or usbvision_parse_lines() to do most
 
1285
 * of work.
 
1286
 *
 
1287
 */
 
1288
static void usbvision_parse_data(struct usb_usbvision *usbvision)
 
1289
{
 
1290
        struct usbvision_frame *frame;
 
1291
        enum ParseState newstate;
 
1292
        long copylen = 0;
 
1293
        unsigned long lock_flags;
 
1294
 
 
1295
        frame = usbvision->curFrame;
 
1296
 
 
1297
        PDEBUG(DBG_PARSE, "parsing len=%d\n", scratch_len(usbvision));
 
1298
 
 
1299
        while (1) {
 
1300
 
 
1301
                newstate = ParseState_Out;
 
1302
                if (scratch_len(usbvision)) {
 
1303
                        if (frame->scanstate == ScanState_Scanning) {
 
1304
                                newstate = usbvision_find_header(usbvision);
 
1305
                        }
 
1306
                        else if (frame->scanstate == ScanState_Lines) {
 
1307
                                if (usbvision->isocMode == ISOC_MODE_YUV420) {
 
1308
                                        newstate = usbvision_parse_lines_420(usbvision, &copylen);
 
1309
                                }
 
1310
                                else if (usbvision->isocMode == ISOC_MODE_YUV422) {
 
1311
                                        newstate = usbvision_parse_lines_422(usbvision, &copylen);
 
1312
                                }
 
1313
                                else if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
 
1314
                                        newstate = usbvision_parse_compress(usbvision, &copylen);
 
1315
                                }
 
1316
 
 
1317
                        }
 
1318
                }
 
1319
                if (newstate == ParseState_Continue) {
 
1320
                        continue;
 
1321
                }
 
1322
                else if ((newstate == ParseState_NextFrame) || (newstate == ParseState_Out)) {
 
1323
                        break;
 
1324
                }
 
1325
                else {
 
1326
                        return; /* ParseState_EndParse */
 
1327
                }
 
1328
        }
 
1329
 
 
1330
        if (newstate == ParseState_NextFrame) {
 
1331
                frame->grabstate = FrameState_Done;
 
1332
                do_gettimeofday(&(frame->timestamp));
 
1333
                frame->sequence = usbvision->frame_num;
 
1334
 
 
1335
                spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
 
1336
                list_move_tail(&(frame->frame), &usbvision->outqueue);
 
1337
                usbvision->curFrame = NULL;
 
1338
                spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
 
1339
 
 
1340
                usbvision->frame_num++;
 
1341
 
 
1342
                /* This will cause the process to request another frame. */
 
1343
                if (waitqueue_active(&usbvision->wait_frame)) {
 
1344
                        PDEBUG(DBG_PARSE, "Wake up !");
 
1345
                        wake_up_interruptible(&usbvision->wait_frame);
 
1346
                }
 
1347
        }
 
1348
        else
 
1349
                frame->grabstate = FrameState_Grabbing;
 
1350
 
 
1351
 
 
1352
        /* Update the frame's uncompressed length. */
 
1353
        frame->scanlength += copylen;
 
1354
}
 
1355
 
 
1356
 
 
1357
/*
 
1358
 * Make all of the blocks of data contiguous
 
1359
 */
 
1360
static int usbvision_compress_isochronous(struct usb_usbvision *usbvision,
 
1361
                                          struct urb *urb)
 
1362
{
 
1363
        unsigned char *packet_data;
 
1364
        int i, totlen = 0;
 
1365
 
 
1366
        for (i = 0; i < urb->number_of_packets; i++) {
 
1367
                int packet_len = urb->iso_frame_desc[i].actual_length;
 
1368
                int packet_stat = urb->iso_frame_desc[i].status;
 
1369
 
 
1370
                packet_data = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 
1371
 
 
1372
                /* Detect and ignore errored packets */
 
1373
                if (packet_stat) {      // packet_stat != 0 ?????????????
 
1374
                        PDEBUG(DBG_ISOC, "data error: [%d] len=%d, status=%X", i, packet_len, packet_stat);
 
1375
                        usbvision->isocErrCount++;
 
1376
                        continue;
 
1377
                }
 
1378
 
 
1379
                /* Detect and ignore empty packets */
 
1380
                if (packet_len < 0) {
 
1381
                        PDEBUG(DBG_ISOC, "error packet [%d]", i);
 
1382
                        usbvision->isocSkipCount++;
 
1383
                        continue;
 
1384
                }
 
1385
                else if (packet_len == 0) {     /* Frame end ????? */
 
1386
                        PDEBUG(DBG_ISOC, "null packet [%d]", i);
 
1387
                        usbvision->isocstate=IsocState_NoFrame;
 
1388
                        usbvision->isocSkipCount++;
 
1389
                        continue;
 
1390
                }
 
1391
                else if (packet_len > usbvision->isocPacketSize) {
 
1392
                        PDEBUG(DBG_ISOC, "packet[%d] > isocPacketSize", i);
 
1393
                        usbvision->isocSkipCount++;
 
1394
                        continue;
 
1395
                }
 
1396
 
 
1397
                PDEBUG(DBG_ISOC, "packet ok [%d] len=%d", i, packet_len);
 
1398
 
 
1399
                if (usbvision->isocstate==IsocState_NoFrame) { //new frame begins
 
1400
                        usbvision->isocstate=IsocState_InFrame;
 
1401
                        scratch_mark_header(usbvision);
 
1402
                        usbvision_measure_bandwidth(usbvision);
 
1403
                        PDEBUG(DBG_ISOC, "packet with header");
 
1404
                }
 
1405
 
 
1406
                /*
 
1407
                 * If usbvision continues to feed us with data but there is no
 
1408
                 * consumption (if, for example, V4L client fell asleep) we
 
1409
                 * may overflow the buffer. We have to move old data over to
 
1410
                 * free room for new data. This is bad for old data. If we
 
1411
                 * just drop new data then it's bad for new data... choose
 
1412
                 * your favorite evil here.
 
1413
                 */
 
1414
                if (scratch_free(usbvision) < packet_len) {
 
1415
 
 
1416
                        usbvision->scratch_ovf_count++;
 
1417
                        PDEBUG(DBG_ISOC, "scratch buf overflow! scr_len: %d, n: %d",
 
1418
                               scratch_len(usbvision), packet_len);
 
1419
                        scratch_rm_old(usbvision, packet_len - scratch_free(usbvision));
 
1420
                }
 
1421
 
 
1422
                /* Now we know that there is enough room in scratch buffer */
 
1423
                scratch_put(usbvision, packet_data, packet_len);
 
1424
                totlen += packet_len;
 
1425
                usbvision->isocDataCount += packet_len;
 
1426
                usbvision->isocPacketCount++;
 
1427
        }
 
1428
#if ENABLE_HEXDUMP
 
1429
        if (totlen > 0) {
 
1430
                static int foo;
 
1431
                if (foo < 1) {
 
1432
                        printk(KERN_DEBUG "+%d.\n", usbvision->scratchlen);
 
1433
                        usbvision_hexdump(data0, (totlen > 64) ? 64 : totlen);
 
1434
                        ++foo;
 
1435
                }
 
1436
        }
 
1437
#endif
 
1438
 return totlen;
 
1439
}
 
1440
 
 
1441
static void usbvision_isocIrq(struct urb *urb)
 
1442
{
 
1443
        int errCode = 0;
 
1444
        int len;
 
1445
        struct usb_usbvision *usbvision = urb->context;
 
1446
        int i;
 
1447
        unsigned long startTime = jiffies;
 
1448
        struct usbvision_frame **f;
 
1449
 
 
1450
        /* We don't want to do anything if we are about to be removed! */
 
1451
        if (!USBVISION_IS_OPERATIONAL(usbvision))
 
1452
                return;
 
1453
 
 
1454
        /* any urb with wrong status is ignored without acknowledgement */
 
1455
        if (urb->status == -ENOENT) {
 
1456
                return;
 
1457
        }
 
1458
 
 
1459
        f = &usbvision->curFrame;
 
1460
 
 
1461
        /* Manage streaming interruption */
 
1462
        if (usbvision->streaming == Stream_Interrupt) {
 
1463
                usbvision->streaming = Stream_Idle;
 
1464
                if ((*f)) {
 
1465
                        (*f)->grabstate = FrameState_Ready;
 
1466
                        (*f)->scanstate = ScanState_Scanning;
 
1467
                }
 
1468
                PDEBUG(DBG_IRQ, "stream interrupted");
 
1469
                wake_up_interruptible(&usbvision->wait_stream);
 
1470
        }
 
1471
 
 
1472
        /* Copy the data received into our scratch buffer */
 
1473
        len = usbvision_compress_isochronous(usbvision, urb);
 
1474
 
 
1475
        usbvision->isocUrbCount++;
 
1476
        usbvision->urb_length = len;
 
1477
 
 
1478
        if (usbvision->streaming == Stream_On) {
 
1479
 
 
1480
                /* If we collected enough data let's parse! */
 
1481
                if ((scratch_len(usbvision) > USBVISION_HEADER_LENGTH) &&
 
1482
                    (!list_empty(&(usbvision->inqueue))) ) {
 
1483
                        if (!(*f)) {
 
1484
                                (*f) = list_entry(usbvision->inqueue.next,
 
1485
                                                  struct usbvision_frame,
 
1486
                                                  frame);
 
1487
                        }
 
1488
                        usbvision_parse_data(usbvision);
 
1489
                }
 
1490
                else {
 
1491
                        /*If we don't have a frame
 
1492
                          we're current working on, complain */
 
1493
                        PDEBUG(DBG_IRQ,
 
1494
                               "received data, but no one needs it");
 
1495
                        scratch_reset(usbvision);
 
1496
                }
 
1497
        }
 
1498
        else {
 
1499
                PDEBUG(DBG_IRQ, "received data, but no one needs it");
 
1500
                scratch_reset(usbvision);
 
1501
        }
 
1502
 
 
1503
        usbvision->timeInIrq += jiffies - startTime;
 
1504
 
 
1505
        for (i = 0; i < USBVISION_URB_FRAMES; i++) {
 
1506
                urb->iso_frame_desc[i].status = 0;
 
1507
                urb->iso_frame_desc[i].actual_length = 0;
 
1508
        }
 
1509
 
 
1510
        urb->status = 0;
 
1511
        urb->dev = usbvision->dev;
 
1512
        errCode = usb_submit_urb (urb, GFP_ATOMIC);
 
1513
 
 
1514
        if(errCode) {
 
1515
                dev_err(&usbvision->dev->dev,
 
1516
                        "%s: usb_submit_urb failed: error %d\n",
 
1517
                                __func__, errCode);
 
1518
        }
 
1519
 
 
1520
        return;
 
1521
}
 
1522
 
 
1523
/*************************************/
 
1524
/* Low level usbvision access functions */
 
1525
/*************************************/
 
1526
 
 
1527
/*
 
1528
 * usbvision_read_reg()
 
1529
 *
 
1530
 * return  < 0 -> Error
 
1531
 *        >= 0 -> Data
 
1532
 */
 
1533
 
 
1534
int usbvision_read_reg(struct usb_usbvision *usbvision, unsigned char reg)
 
1535
{
 
1536
        int errCode = 0;
 
1537
        unsigned char buffer[1];
 
1538
 
 
1539
        if (!USBVISION_IS_OPERATIONAL(usbvision))
 
1540
                return -1;
 
1541
 
 
1542
        errCode = usb_control_msg(usbvision->dev, usb_rcvctrlpipe(usbvision->dev, 1),
 
1543
                                USBVISION_OP_CODE,
 
1544
                                USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
 
1545
                                0, (__u16) reg, buffer, 1, HZ);
 
1546
 
 
1547
        if (errCode < 0) {
 
1548
                dev_err(&usbvision->dev->dev,
 
1549
                        "%s: failed: error %d\n", __func__, errCode);
 
1550
                return errCode;
 
1551
        }
 
1552
        return buffer[0];
 
1553
}
 
1554
 
 
1555
/*
 
1556
 * usbvision_write_reg()
 
1557
 *
 
1558
 * return 1 -> Reg written
 
1559
 *        0 -> usbvision is not yet ready
 
1560
 *       -1 -> Something went wrong
 
1561
 */
 
1562
 
 
1563
int usbvision_write_reg(struct usb_usbvision *usbvision, unsigned char reg,
 
1564
                            unsigned char value)
 
1565
{
 
1566
        int errCode = 0;
 
1567
 
 
1568
        if (!USBVISION_IS_OPERATIONAL(usbvision))
 
1569
                return 0;
 
1570
 
 
1571
        errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
 
1572
                                USBVISION_OP_CODE,
 
1573
                                USB_DIR_OUT | USB_TYPE_VENDOR |
 
1574
                                USB_RECIP_ENDPOINT, 0, (__u16) reg, &value, 1, HZ);
 
1575
 
 
1576
        if (errCode < 0) {
 
1577
                dev_err(&usbvision->dev->dev,
 
1578
                        "%s: failed: error %d\n", __func__, errCode);
 
1579
        }
 
1580
        return errCode;
 
1581
}
 
1582
 
 
1583
 
 
1584
static void usbvision_ctrlUrb_complete(struct urb *urb)
 
1585
{
 
1586
        struct usb_usbvision *usbvision = (struct usb_usbvision *)urb->context;
 
1587
 
 
1588
        PDEBUG(DBG_IRQ, "");
 
1589
        usbvision->ctrlUrbBusy = 0;
 
1590
        if (waitqueue_active(&usbvision->ctrlUrb_wq)) {
 
1591
                wake_up_interruptible(&usbvision->ctrlUrb_wq);
 
1592
        }
 
1593
}
 
1594
 
 
1595
 
 
1596
static int usbvision_write_reg_irq(struct usb_usbvision *usbvision,int address,
 
1597
                                                                        unsigned char *data, int len)
 
1598
{
 
1599
        int errCode = 0;
 
1600
 
 
1601
        PDEBUG(DBG_IRQ, "");
 
1602
        if (len > 8) {
 
1603
                return -EFAULT;
 
1604
        }
 
1605
        if (usbvision->ctrlUrbBusy) {
 
1606
                return -EBUSY;
 
1607
        }
 
1608
        usbvision->ctrlUrbBusy = 1;
 
1609
 
 
1610
        usbvision->ctrlUrbSetup.bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT;
 
1611
        usbvision->ctrlUrbSetup.bRequest     = USBVISION_OP_CODE;
 
1612
        usbvision->ctrlUrbSetup.wValue       = 0;
 
1613
        usbvision->ctrlUrbSetup.wIndex       = cpu_to_le16(address);
 
1614
        usbvision->ctrlUrbSetup.wLength      = cpu_to_le16(len);
 
1615
        usb_fill_control_urb (usbvision->ctrlUrb, usbvision->dev,
 
1616
                                                        usb_sndctrlpipe(usbvision->dev, 1),
 
1617
                                                        (unsigned char *)&usbvision->ctrlUrbSetup,
 
1618
                                                        (void *)usbvision->ctrlUrbBuffer, len,
 
1619
                                                        usbvision_ctrlUrb_complete,
 
1620
                                                        (void *)usbvision);
 
1621
 
 
1622
        memcpy(usbvision->ctrlUrbBuffer, data, len);
 
1623
 
 
1624
        errCode = usb_submit_urb(usbvision->ctrlUrb, GFP_ATOMIC);
 
1625
        if (errCode < 0) {
 
1626
                // error in usb_submit_urb()
 
1627
                usbvision->ctrlUrbBusy = 0;
 
1628
        }
 
1629
        PDEBUG(DBG_IRQ, "submit %d byte: error %d", len, errCode);
 
1630
        return errCode;
 
1631
}
 
1632
 
 
1633
 
 
1634
static int usbvision_init_compression(struct usb_usbvision *usbvision)
 
1635
{
 
1636
        int errCode = 0;
 
1637
 
 
1638
        usbvision->lastIsocFrameNum = -1;
 
1639
        usbvision->isocDataCount = 0;
 
1640
        usbvision->isocPacketCount = 0;
 
1641
        usbvision->isocSkipCount = 0;
 
1642
        usbvision->comprLevel = 50;
 
1643
        usbvision->lastComprLevel = -1;
 
1644
        usbvision->isocUrbCount = 0;
 
1645
        usbvision->requestIntra = 1;
 
1646
        usbvision->isocMeasureBandwidthCount = 0;
 
1647
 
 
1648
        return errCode;
 
1649
}
 
1650
 
 
1651
/* this function measures the used bandwidth since last call
 
1652
 * return:    0 : no error
 
1653
 * sets usedBandwidth to 1-100 : 1-100% of full bandwidth resp. to isocPacketSize
 
1654
 */
 
1655
static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision)
 
1656
{
 
1657
        int errCode = 0;
 
1658
 
 
1659
        if (usbvision->isocMeasureBandwidthCount < 2) { // this gives an average bandwidth of 3 frames
 
1660
                usbvision->isocMeasureBandwidthCount++;
 
1661
                return errCode;
 
1662
        }
 
1663
        if ((usbvision->isocPacketSize > 0) && (usbvision->isocPacketCount > 0)) {
 
1664
                usbvision->usedBandwidth = usbvision->isocDataCount /
 
1665
                                        (usbvision->isocPacketCount + usbvision->isocSkipCount) *
 
1666
                                        100 / usbvision->isocPacketSize;
 
1667
        }
 
1668
        usbvision->isocMeasureBandwidthCount = 0;
 
1669
        usbvision->isocDataCount = 0;
 
1670
        usbvision->isocPacketCount = 0;
 
1671
        usbvision->isocSkipCount = 0;
 
1672
        return errCode;
 
1673
}
 
1674
 
 
1675
static int usbvision_adjust_compression (struct usb_usbvision *usbvision)
 
1676
{
 
1677
        int errCode = 0;
 
1678
        unsigned char buffer[6];
 
1679
 
 
1680
        PDEBUG(DBG_IRQ, "");
 
1681
        if ((adjustCompression) && (usbvision->usedBandwidth > 0)) {
 
1682
                usbvision->comprLevel += (usbvision->usedBandwidth - 90) / 2;
 
1683
                RESTRICT_TO_RANGE(usbvision->comprLevel, 0, 100);
 
1684
                if (usbvision->comprLevel != usbvision->lastComprLevel) {
 
1685
                        int distorsion;
 
1686
                        if (usbvision->bridgeType == BRIDGE_NT1004 || usbvision->bridgeType == BRIDGE_NT1005) {
 
1687
                                buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100);      // PCM Threshold 1
 
1688
                                buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100);       // PCM Threshold 2
 
1689
                                distorsion = 7 + 248 * usbvision->comprLevel / 100;
 
1690
                                buffer[2] = (unsigned char)(distorsion & 0xFF);                         // Average distorsion Threshold (inter)
 
1691
                                buffer[3] = (unsigned char)(distorsion & 0xFF);                         // Average distorsion Threshold (intra)
 
1692
                                distorsion = 1 + 42 * usbvision->comprLevel / 100;
 
1693
                                buffer[4] = (unsigned char)(distorsion & 0xFF);                         // Maximum distorsion Threshold (inter)
 
1694
                                buffer[5] = (unsigned char)(distorsion & 0xFF);                         // Maximum distorsion Threshold (intra)
 
1695
                        }
 
1696
                        else { //BRIDGE_NT1003
 
1697
                                buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100);      // PCM threshold 1
 
1698
                                buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100);       // PCM threshold 2
 
1699
                                distorsion = 2 + 253 * usbvision->comprLevel / 100;
 
1700
                                buffer[2] = (unsigned char)(distorsion & 0xFF);                         // distorsion threshold bit0-7
 
1701
                                buffer[3] = 0;  //(unsigned char)((distorsion >> 8) & 0x0F);            // distorsion threshold bit 8-11
 
1702
                                distorsion = 0 + 43 * usbvision->comprLevel / 100;
 
1703
                                buffer[4] = (unsigned char)(distorsion & 0xFF);                         // maximum distorsion bit0-7
 
1704
                                buffer[5] = 0; //(unsigned char)((distorsion >> 8) & 0x01);             // maximum distorsion bit 8
 
1705
                        }
 
1706
                        errCode = usbvision_write_reg_irq(usbvision, USBVISION_PCM_THR1, buffer, 6);
 
1707
                        if (errCode == 0){
 
1708
                                PDEBUG(DBG_IRQ, "new compr params %#02x %#02x %#02x %#02x %#02x %#02x", buffer[0],
 
1709
                                                                buffer[1], buffer[2], buffer[3], buffer[4], buffer[5]);
 
1710
                                usbvision->lastComprLevel = usbvision->comprLevel;
 
1711
                        }
 
1712
                }
 
1713
        }
 
1714
        return errCode;
 
1715
}
 
1716
 
 
1717
static int usbvision_request_intra (struct usb_usbvision *usbvision)
 
1718
{
 
1719
        int errCode = 0;
 
1720
        unsigned char buffer[1];
 
1721
 
 
1722
        PDEBUG(DBG_IRQ, "");
 
1723
        usbvision->requestIntra = 1;
 
1724
        buffer[0] = 1;
 
1725
        usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
 
1726
        return errCode;
 
1727
}
 
1728
 
 
1729
static int usbvision_unrequest_intra (struct usb_usbvision *usbvision)
 
1730
{
 
1731
        int errCode = 0;
 
1732
        unsigned char buffer[1];
 
1733
 
 
1734
        PDEBUG(DBG_IRQ, "");
 
1735
        usbvision->requestIntra = 0;
 
1736
        buffer[0] = 0;
 
1737
        usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
 
1738
        return errCode;
 
1739
}
 
1740
 
 
1741
/*******************************
 
1742
 * usbvision utility functions
 
1743
 *******************************/
 
1744
 
 
1745
int usbvision_power_off(struct usb_usbvision *usbvision)
 
1746
{
 
1747
        int errCode = 0;
 
1748
 
 
1749
        PDEBUG(DBG_FUNC, "");
 
1750
 
 
1751
        errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
 
1752
        if (errCode == 1) {
 
1753
                usbvision->power = 0;
 
1754
        }
 
1755
        PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode!=1)?"ERROR":"power is off", errCode);
 
1756
        return errCode;
 
1757
}
 
1758
 
 
1759
/*
 
1760
 * usbvision_set_video_format()
 
1761
 *
 
1762
 */
 
1763
static int usbvision_set_video_format(struct usb_usbvision *usbvision, int format)
 
1764
{
 
1765
        static const char proc[] = "usbvision_set_video_format";
 
1766
        int rc;
 
1767
        unsigned char value[2];
 
1768
 
 
1769
        if (!USBVISION_IS_OPERATIONAL(usbvision))
 
1770
                return 0;
 
1771
 
 
1772
        PDEBUG(DBG_FUNC, "isocMode %#02x", format);
 
1773
 
 
1774
        if ((format != ISOC_MODE_YUV422)
 
1775
            && (format != ISOC_MODE_YUV420)
 
1776
            && (format != ISOC_MODE_COMPRESS)) {
 
1777
                printk(KERN_ERR "usbvision: unknown video format %02x, using default YUV420",
 
1778
                       format);
 
1779
                format = ISOC_MODE_YUV420;
 
1780
        }
 
1781
        value[0] = 0x0A;  //TODO: See the effect of the filter
 
1782
        value[1] = format; // Sets the VO_MODE register which follows FILT_CONT
 
1783
        rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
 
1784
                             USBVISION_OP_CODE,
 
1785
                             USB_DIR_OUT | USB_TYPE_VENDOR |
 
1786
                             USB_RECIP_ENDPOINT, 0,
 
1787
                             (__u16) USBVISION_FILT_CONT, value, 2, HZ);
 
1788
 
 
1789
        if (rc < 0) {
 
1790
                printk(KERN_ERR "%s: ERROR=%d. USBVISION stopped - "
 
1791
                       "reconnect or reload driver.\n", proc, rc);
 
1792
        }
 
1793
        usbvision->isocMode = format;
 
1794
        return rc;
 
1795
}
 
1796
 
 
1797
/*
 
1798
 * usbvision_set_output()
 
1799
 *
 
1800
 */
 
1801
 
 
1802
int usbvision_set_output(struct usb_usbvision *usbvision, int width,
 
1803
                         int height)
 
1804
{
 
1805
        int errCode = 0;
 
1806
        int UsbWidth, UsbHeight;
 
1807
        unsigned int frameRate=0, frameDrop=0;
 
1808
        unsigned char value[4];
 
1809
 
 
1810
        if (!USBVISION_IS_OPERATIONAL(usbvision)) {
 
1811
                return 0;
 
1812
        }
 
1813
 
 
1814
        if (width > MAX_USB_WIDTH) {
 
1815
                UsbWidth = width / 2;
 
1816
                usbvision->stretch_width = 2;
 
1817
        }
 
1818
        else {
 
1819
                UsbWidth = width;
 
1820
                usbvision->stretch_width = 1;
 
1821
        }
 
1822
 
 
1823
        if (height > MAX_USB_HEIGHT) {
 
1824
                UsbHeight = height / 2;
 
1825
                usbvision->stretch_height = 2;
 
1826
        }
 
1827
        else {
 
1828
                UsbHeight = height;
 
1829
                usbvision->stretch_height = 1;
 
1830
        }
 
1831
 
 
1832
        RESTRICT_TO_RANGE(UsbWidth, MIN_FRAME_WIDTH, MAX_USB_WIDTH);
 
1833
        UsbWidth &= ~(MIN_FRAME_WIDTH-1);
 
1834
        RESTRICT_TO_RANGE(UsbHeight, MIN_FRAME_HEIGHT, MAX_USB_HEIGHT);
 
1835
        UsbHeight &= ~(1);
 
1836
 
 
1837
        PDEBUG(DBG_FUNC, "usb %dx%d; screen %dx%d; stretch %dx%d",
 
1838
                                                UsbWidth, UsbHeight, width, height,
 
1839
                                                usbvision->stretch_width, usbvision->stretch_height);
 
1840
 
 
1841
        /* I'll not rewrite the same values */
 
1842
        if ((UsbWidth != usbvision->curwidth) || (UsbHeight != usbvision->curheight)) {
 
1843
                value[0] = UsbWidth & 0xff;             //LSB
 
1844
                value[1] = (UsbWidth >> 8) & 0x03;      //MSB
 
1845
                value[2] = UsbHeight & 0xff;            //LSB
 
1846
                value[3] = (UsbHeight >> 8) & 0x03;     //MSB
 
1847
 
 
1848
                errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
 
1849
                             USBVISION_OP_CODE,
 
1850
                             USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
 
1851
                                 0, (__u16) USBVISION_LXSIZE_O, value, 4, HZ);
 
1852
 
 
1853
                if (errCode < 0) {
 
1854
                        dev_err(&usbvision->dev->dev,
 
1855
                                "%s failed: error %d\n", __func__, errCode);
 
1856
                        return errCode;
 
1857
                }
 
1858
                usbvision->curwidth = usbvision->stretch_width * UsbWidth;
 
1859
                usbvision->curheight = usbvision->stretch_height * UsbHeight;
 
1860
        }
 
1861
 
 
1862
        if (usbvision->isocMode == ISOC_MODE_YUV422) {
 
1863
                frameRate = (usbvision->isocPacketSize * 1000) / (UsbWidth * UsbHeight * 2);
 
1864
        }
 
1865
        else if (usbvision->isocMode == ISOC_MODE_YUV420) {
 
1866
                frameRate = (usbvision->isocPacketSize * 1000) / ((UsbWidth * UsbHeight * 12) / 8);
 
1867
        }
 
1868
        else {
 
1869
                frameRate = FRAMERATE_MAX;
 
1870
        }
 
1871
 
 
1872
        if (usbvision->tvnormId & V4L2_STD_625_50) {
 
1873
                frameDrop = frameRate * 32 / 25 - 1;
 
1874
        }
 
1875
        else if (usbvision->tvnormId & V4L2_STD_525_60) {
 
1876
                frameDrop = frameRate * 32 / 30 - 1;
 
1877
        }
 
1878
 
 
1879
        RESTRICT_TO_RANGE(frameDrop, FRAMERATE_MIN, FRAMERATE_MAX);
 
1880
 
 
1881
        PDEBUG(DBG_FUNC, "frameRate %d fps, frameDrop %d", frameRate, frameDrop);
 
1882
 
 
1883
        frameDrop = FRAMERATE_MAX;      // We can allow the maximum here, because dropping is controlled
 
1884
 
 
1885
        /* frameDrop = 7; => framePhase = 1, 5, 9, 13, 17, 21, 25, 0, 4, 8, ...
 
1886
                => frameSkip = 4;
 
1887
                => frameRate = (7 + 1) * 25 / 32 = 200 / 32 = 6.25;
 
1888
 
 
1889
           frameDrop = 9; => framePhase = 1, 5, 8, 11, 14, 17, 21, 24, 27, 1, 4, 8, ...
 
1890
            => frameSkip = 4, 3, 3, 3, 3, 4, 3, 3, 3, 3, 4, ...
 
1891
                => frameRate = (9 + 1) * 25 / 32 = 250 / 32 = 7.8125;
 
1892
        */
 
1893
        errCode = usbvision_write_reg(usbvision, USBVISION_FRM_RATE, frameDrop);
 
1894
        return errCode;
 
1895
}
 
1896
 
 
1897
 
 
1898
/*
 
1899
 * usbvision_frames_alloc
 
1900
 * allocate the required frames
 
1901
 */
 
1902
int usbvision_frames_alloc(struct usb_usbvision *usbvision, int number_of_frames)
 
1903
{
 
1904
        int i;
 
1905
 
 
1906
        /*needs to be page aligned cause the buffers can be mapped individually! */
 
1907
        usbvision->max_frame_size =  PAGE_ALIGN(usbvision->curwidth *
 
1908
                                                usbvision->curheight *
 
1909
                                                usbvision->palette.bytes_per_pixel);
 
1910
 
 
1911
        /* Try to do my best to allocate the frames the user want in the remaining memory */
 
1912
        usbvision->num_frames = number_of_frames;
 
1913
        while (usbvision->num_frames > 0) {
 
1914
                usbvision->fbuf_size = usbvision->num_frames * usbvision->max_frame_size;
 
1915
                if((usbvision->fbuf = usbvision_rvmalloc(usbvision->fbuf_size))) {
 
1916
                        break;
 
1917
                }
 
1918
                usbvision->num_frames--;
 
1919
        }
 
1920
 
 
1921
        spin_lock_init(&usbvision->queue_lock);
 
1922
        init_waitqueue_head(&usbvision->wait_frame);
 
1923
        init_waitqueue_head(&usbvision->wait_stream);
 
1924
 
 
1925
        /* Allocate all buffers */
 
1926
        for (i = 0; i < usbvision->num_frames; i++) {
 
1927
                usbvision->frame[i].index = i;
 
1928
                usbvision->frame[i].grabstate = FrameState_Unused;
 
1929
                usbvision->frame[i].data = usbvision->fbuf +
 
1930
                        i * usbvision->max_frame_size;
 
1931
                /*
 
1932
                 * Set default sizes for read operation.
 
1933
                 */
 
1934
                usbvision->stretch_width = 1;
 
1935
                usbvision->stretch_height = 1;
 
1936
                usbvision->frame[i].width = usbvision->curwidth;
 
1937
                usbvision->frame[i].height = usbvision->curheight;
 
1938
                usbvision->frame[i].bytes_read = 0;
 
1939
        }
 
1940
        PDEBUG(DBG_FUNC, "allocated %d frames (%d bytes per frame)",usbvision->num_frames,usbvision->max_frame_size);
 
1941
        return usbvision->num_frames;
 
1942
}
 
1943
 
 
1944
/*
 
1945
 * usbvision_frames_free
 
1946
 * frees memory allocated for the frames
 
1947
 */
 
1948
void usbvision_frames_free(struct usb_usbvision *usbvision)
 
1949
{
 
1950
        /* Have to free all that memory */
 
1951
        PDEBUG(DBG_FUNC, "free %d frames",usbvision->num_frames);
 
1952
 
 
1953
        if (usbvision->fbuf != NULL) {
 
1954
                usbvision_rvfree(usbvision->fbuf, usbvision->fbuf_size);
 
1955
                usbvision->fbuf = NULL;
 
1956
 
 
1957
                usbvision->num_frames = 0;
 
1958
        }
 
1959
}
 
1960
/*
 
1961
 * usbvision_empty_framequeues()
 
1962
 * prepare queues for incoming and outgoing frames
 
1963
 */
 
1964
void usbvision_empty_framequeues(struct usb_usbvision *usbvision)
 
1965
{
 
1966
        u32 i;
 
1967
 
 
1968
        INIT_LIST_HEAD(&(usbvision->inqueue));
 
1969
        INIT_LIST_HEAD(&(usbvision->outqueue));
 
1970
 
 
1971
        for (i = 0; i < USBVISION_NUMFRAMES; i++) {
 
1972
                usbvision->frame[i].grabstate = FrameState_Unused;
 
1973
                usbvision->frame[i].bytes_read = 0;
 
1974
        }
 
1975
}
 
1976
 
 
1977
/*
 
1978
 * usbvision_stream_interrupt()
 
1979
 * stops streaming
 
1980
 */
 
1981
int usbvision_stream_interrupt(struct usb_usbvision *usbvision)
 
1982
{
 
1983
        int ret = 0;
 
1984
 
 
1985
        /* stop reading from the device */
 
1986
 
 
1987
        usbvision->streaming = Stream_Interrupt;
 
1988
        ret = wait_event_timeout(usbvision->wait_stream,
 
1989
                                 (usbvision->streaming == Stream_Idle),
 
1990
                                 msecs_to_jiffies(USBVISION_NUMSBUF*USBVISION_URB_FRAMES));
 
1991
        return ret;
 
1992
}
 
1993
 
 
1994
/*
 
1995
 * usbvision_set_compress_params()
 
1996
 *
 
1997
 */
 
1998
 
 
1999
static int usbvision_set_compress_params(struct usb_usbvision *usbvision)
 
2000
{
 
2001
        static const char proc[] = "usbvision_set_compresion_params: ";
 
2002
        int rc;
 
2003
        unsigned char value[6];
 
2004
 
 
2005
        value[0] = 0x0F;    // Intra-Compression cycle
 
2006
        value[1] = 0x01;    // Reg.45 one line per strip
 
2007
        value[2] = 0x00;    // Reg.46 Force intra mode on all new frames
 
2008
        value[3] = 0x00;    // Reg.47 FORCE_UP <- 0 normal operation (not force)
 
2009
        value[4] = 0xA2;    // Reg.48 BUF_THR I'm not sure if this does something in not compressed mode.
 
2010
        value[5] = 0x00;    // Reg.49 DVI_YUV This has nothing to do with compression
 
2011
 
 
2012
        //catched values for NT1004
 
2013
        // value[0] = 0xFF; // Never apply intra mode automatically
 
2014
        // value[1] = 0xF1; // Use full frame height for virtual strip width; One line per strip
 
2015
        // value[2] = 0x01; // Force intra mode on all new frames
 
2016
        // value[3] = 0x00; // Strip size 400 Bytes; do not force up
 
2017
        // value[4] = 0xA2; //
 
2018
        if (!USBVISION_IS_OPERATIONAL(usbvision))
 
2019
                return 0;
 
2020
 
 
2021
        rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
 
2022
                             USBVISION_OP_CODE,
 
2023
                             USB_DIR_OUT | USB_TYPE_VENDOR |
 
2024
                             USB_RECIP_ENDPOINT, 0,
 
2025
                             (__u16) USBVISION_INTRA_CYC, value, 5, HZ);
 
2026
 
 
2027
        if (rc < 0) {
 
2028
                printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
 
2029
                       "reconnect or reload driver.\n", proc, rc);
 
2030
                return rc;
 
2031
        }
 
2032
 
 
2033
        if (usbvision->bridgeType == BRIDGE_NT1004) {
 
2034
                value[0] =  20; // PCM Threshold 1
 
2035
                value[1] =  12; // PCM Threshold 2
 
2036
                value[2] = 255; // Distorsion Threshold inter
 
2037
                value[3] = 255; // Distorsion Threshold intra
 
2038
                value[4] =  43; // Max Distorsion inter
 
2039
                value[5] =  43; // Max Distorsion intra
 
2040
        }
 
2041
        else {
 
2042
                value[0] =  20; // PCM Threshold 1
 
2043
                value[1] =  12; // PCM Threshold 2
 
2044
                value[2] = 255; // Distorsion Threshold d7-d0
 
2045
                value[3] =   0; // Distorsion Threshold d11-d8
 
2046
                value[4] =  43; // Max Distorsion d7-d0
 
2047
                value[5] =   0; // Max Distorsion d8
 
2048
        }
 
2049
 
 
2050
        if (!USBVISION_IS_OPERATIONAL(usbvision))
 
2051
                return 0;
 
2052
 
 
2053
        rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
 
2054
                             USBVISION_OP_CODE,
 
2055
                             USB_DIR_OUT | USB_TYPE_VENDOR |
 
2056
                             USB_RECIP_ENDPOINT, 0,
 
2057
                             (__u16) USBVISION_PCM_THR1, value, 6, HZ);
 
2058
 
 
2059
        if (rc < 0) {
 
2060
                printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
 
2061
                       "reconnect or reload driver.\n", proc, rc);
 
2062
                return rc;
 
2063
        }
 
2064
 
 
2065
 
 
2066
        return rc;
 
2067
}
 
2068
 
 
2069
 
 
2070
/*
 
2071
 * usbvision_set_input()
 
2072
 *
 
2073
 * Set the input (saa711x, ...) size x y and other misc input params
 
2074
 * I've no idea if this parameters are right
 
2075
 *
 
2076
 */
 
2077
int usbvision_set_input(struct usb_usbvision *usbvision)
 
2078
{
 
2079
        static const char proc[] = "usbvision_set_input: ";
 
2080
        int rc;
 
2081
        unsigned char value[8];
 
2082
        unsigned char dvi_yuv_value;
 
2083
 
 
2084
        if (!USBVISION_IS_OPERATIONAL(usbvision))
 
2085
                return 0;
 
2086
 
 
2087
        /* Set input format expected from decoder*/
 
2088
        if (usbvision_device_data[usbvision->DevModel].Vin_Reg1_override) {
 
2089
                value[0] = usbvision_device_data[usbvision->DevModel].Vin_Reg1;
 
2090
        } else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) {
 
2091
                /* SAA7113 uses 8 bit output */
 
2092
                value[0] = USBVISION_8_422_SYNC;
 
2093
        } else {
 
2094
                /* I'm sure only about d2-d0 [010] 16 bit 4:2:2 usin sync pulses
 
2095
                 * as that is how saa7111 is configured */
 
2096
                value[0] = USBVISION_16_422_SYNC;
 
2097
                /* | USBVISION_VSNC_POL | USBVISION_VCLK_POL);*/
 
2098
        }
 
2099
 
 
2100
        rc = usbvision_write_reg(usbvision, USBVISION_VIN_REG1, value[0]);
 
2101
        if (rc < 0) {
 
2102
                printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
 
2103
                       "reconnect or reload driver.\n", proc, rc);
 
2104
                return rc;
 
2105
        }
 
2106
 
 
2107
 
 
2108
        if (usbvision->tvnormId & V4L2_STD_PAL) {
 
2109
                value[0] = 0xC0;
 
2110
                value[1] = 0x02;        //0x02C0 -> 704 Input video line length
 
2111
                value[2] = 0x20;
 
2112
                value[3] = 0x01;        //0x0120 -> 288 Input video n. of lines
 
2113
                value[4] = 0x60;
 
2114
                value[5] = 0x00;        //0x0060 -> 96 Input video h offset
 
2115
                value[6] = 0x16;
 
2116
                value[7] = 0x00;        //0x0016 -> 22 Input video v offset
 
2117
        } else if (usbvision->tvnormId & V4L2_STD_SECAM) {
 
2118
                value[0] = 0xC0;
 
2119
                value[1] = 0x02;        //0x02C0 -> 704 Input video line length
 
2120
                value[2] = 0x20;
 
2121
                value[3] = 0x01;        //0x0120 -> 288 Input video n. of lines
 
2122
                value[4] = 0x01;
 
2123
                value[5] = 0x00;        //0x0001 -> 01 Input video h offset
 
2124
                value[6] = 0x01;
 
2125
                value[7] = 0x00;        //0x0001 -> 01 Input video v offset
 
2126
        } else {        /* V4L2_STD_NTSC */
 
2127
                value[0] = 0xD0;
 
2128
                value[1] = 0x02;        //0x02D0 -> 720 Input video line length
 
2129
                value[2] = 0xF0;
 
2130
                value[3] = 0x00;        //0x00F0 -> 240 Input video number of lines
 
2131
                value[4] = 0x50;
 
2132
                value[5] = 0x00;        //0x0050 -> 80 Input video h offset
 
2133
                value[6] = 0x10;
 
2134
                value[7] = 0x00;        //0x0010 -> 16 Input video v offset
 
2135
        }
 
2136
 
 
2137
        if (usbvision_device_data[usbvision->DevModel].X_Offset >= 0) {
 
2138
                value[4]=usbvision_device_data[usbvision->DevModel].X_Offset & 0xff;
 
2139
                value[5]=(usbvision_device_data[usbvision->DevModel].X_Offset & 0x0300) >> 8;
 
2140
        }
 
2141
 
 
2142
        if (adjust_X_Offset != -1) {
 
2143
                value[4] = adjust_X_Offset & 0xff;
 
2144
                value[5] = (adjust_X_Offset & 0x0300) >> 8;
 
2145
        }
 
2146
 
 
2147
        if (usbvision_device_data[usbvision->DevModel].Y_Offset >= 0) {
 
2148
                value[6]=usbvision_device_data[usbvision->DevModel].Y_Offset & 0xff;
 
2149
                value[7]=(usbvision_device_data[usbvision->DevModel].Y_Offset & 0x0300) >> 8;
 
2150
        }
 
2151
 
 
2152
        if (adjust_Y_Offset != -1) {
 
2153
                value[6] = adjust_Y_Offset & 0xff;
 
2154
                value[7] = (adjust_Y_Offset & 0x0300) >> 8;
 
2155
        }
 
2156
 
 
2157
        rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
 
2158
                             USBVISION_OP_CODE, /* USBVISION specific code */
 
2159
                             USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0,
 
2160
                             (__u16) USBVISION_LXSIZE_I, value, 8, HZ);
 
2161
        if (rc < 0) {
 
2162
                printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
 
2163
                       "reconnect or reload driver.\n", proc, rc);
 
2164
                return rc;
 
2165
        }
 
2166
 
 
2167
 
 
2168
        dvi_yuv_value = 0x00;   /* U comes after V, Ya comes after U/V, Yb comes after Yb */
 
2169
 
 
2170
        if(usbvision_device_data[usbvision->DevModel].Dvi_yuv_override){
 
2171
                dvi_yuv_value = usbvision_device_data[usbvision->DevModel].Dvi_yuv;
 
2172
        }
 
2173
        else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) {
 
2174
        /* This changes as the fine sync control changes. Further investigation necessary */
 
2175
                dvi_yuv_value = 0x06;
 
2176
        }
 
2177
 
 
2178
        return (usbvision_write_reg(usbvision, USBVISION_DVI_YUV, dvi_yuv_value));
 
2179
}
 
2180
 
 
2181
 
 
2182
/*
 
2183
 * usbvision_set_dram_settings()
 
2184
 *
 
2185
 * Set the buffer address needed by the usbvision dram to operate
 
2186
 * This values has been taken with usbsnoop.
 
2187
 *
 
2188
 */
 
2189
 
 
2190
static int usbvision_set_dram_settings(struct usb_usbvision *usbvision)
 
2191
{
 
2192
        int rc;
 
2193
        unsigned char value[8];
 
2194
 
 
2195
        if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
 
2196
                value[0] = 0x42;
 
2197
                value[1] = 0x71;
 
2198
                value[2] = 0xff;
 
2199
                value[3] = 0x00;
 
2200
                value[4] = 0x98;
 
2201
                value[5] = 0xe0;
 
2202
                value[6] = 0x71;
 
2203
                value[7] = 0xff;
 
2204
                // UR:  0x0E200-0x3FFFF = 204288 Words (1 Word = 2 Byte)
 
2205
                // FDL: 0x00000-0x0E099 =  57498 Words
 
2206
                // VDW: 0x0E3FF-0x3FFFF
 
2207
        }
 
2208
        else {
 
2209
                value[0] = 0x42;
 
2210
                value[1] = 0x00;
 
2211
                value[2] = 0xff;
 
2212
                value[3] = 0x00;
 
2213
                value[4] = 0x00;
 
2214
                value[5] = 0x00;
 
2215
                value[6] = 0x00;
 
2216
                value[7] = 0xff;
 
2217
        }
 
2218
        /* These are the values of the address of the video buffer,
 
2219
         * they have to be loaded into the USBVISION_DRM_PRM1-8
 
2220
         *
 
2221
         * Start address of video output buffer for read:       drm_prm1-2 -> 0x00000
 
2222
         * End address of video output buffer for read:         drm_prm1-3 -> 0x1ffff
 
2223
         * Start address of video frame delay buffer:           drm_prm1-4 -> 0x20000
 
2224
         *    Only used in compressed mode
 
2225
         * End address of video frame delay buffer:             drm_prm1-5-6 -> 0x3ffff
 
2226
         *    Only used in compressed mode
 
2227
         * Start address of video output buffer for write:      drm_prm1-7 -> 0x00000
 
2228
         * End address of video output buffer for write:        drm_prm1-8 -> 0x1ffff
 
2229
         */
 
2230
 
 
2231
        if (!USBVISION_IS_OPERATIONAL(usbvision))
 
2232
                return 0;
 
2233
 
 
2234
        rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
 
2235
                             USBVISION_OP_CODE, /* USBVISION specific code */
 
2236
                             USB_DIR_OUT | USB_TYPE_VENDOR |
 
2237
                             USB_RECIP_ENDPOINT, 0,
 
2238
                             (__u16) USBVISION_DRM_PRM1, value, 8, HZ);
 
2239
 
 
2240
        if (rc < 0) {
 
2241
                dev_err(&usbvision->dev->dev, "%sERROR=%d\n", __func__, rc);
 
2242
                return rc;
 
2243
        }
 
2244
 
 
2245
        /* Restart the video buffer logic */
 
2246
        if ((rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, USBVISION_RES_UR |
 
2247
                                   USBVISION_RES_FDL | USBVISION_RES_VDW)) < 0)
 
2248
                return rc;
 
2249
        rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, 0x00);
 
2250
 
 
2251
        return rc;
 
2252
}
 
2253
 
 
2254
/*
 
2255
 * ()
 
2256
 *
 
2257
 * Power on the device, enables suspend-resume logic
 
2258
 * &  reset the isoc End-Point
 
2259
 *
 
2260
 */
 
2261
 
 
2262
int usbvision_power_on(struct usb_usbvision *usbvision)
 
2263
{
 
2264
        int errCode = 0;
 
2265
 
 
2266
        PDEBUG(DBG_FUNC, "");
 
2267
 
 
2268
        usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
 
2269
        usbvision_write_reg(usbvision, USBVISION_PWR_REG,
 
2270
                         USBVISION_SSPND_EN | USBVISION_RES2);
 
2271
 
 
2272
        usbvision_write_reg(usbvision, USBVISION_PWR_REG,
 
2273
                         USBVISION_SSPND_EN | USBVISION_PWR_VID);
 
2274
        errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
 
2275
                                                USBVISION_SSPND_EN | USBVISION_PWR_VID | USBVISION_RES2);
 
2276
        if (errCode == 1) {
 
2277
                usbvision->power = 1;
 
2278
        }
 
2279
        PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode<0)?"ERROR":"power is on", errCode);
 
2280
        return errCode;
 
2281
}
 
2282
 
 
2283
 
 
2284
/*
 
2285
 * usbvision timer stuff
 
2286
 */
 
2287
 
 
2288
// to call usbvision_power_off from task queue
 
2289
static void call_usbvision_power_off(struct work_struct *work)
 
2290
{
 
2291
        struct usb_usbvision *usbvision = container_of(work, struct usb_usbvision, powerOffWork);
 
2292
 
 
2293
        PDEBUG(DBG_FUNC, "");
 
2294
        if(mutex_lock_interruptible(&usbvision->lock)) {
 
2295
                return;
 
2296
        }
 
2297
 
 
2298
 
 
2299
        if(usbvision->user == 0) {
 
2300
                usbvision_i2c_unregister(usbvision);
 
2301
 
 
2302
                usbvision_power_off(usbvision);
 
2303
                usbvision->initialized = 0;
 
2304
        }
 
2305
        mutex_unlock(&usbvision->lock);
 
2306
}
 
2307
 
 
2308
static void usbvision_powerOffTimer(unsigned long data)
 
2309
{
 
2310
        struct usb_usbvision *usbvision = (void *) data;
 
2311
 
 
2312
        PDEBUG(DBG_FUNC, "");
 
2313
        del_timer(&usbvision->powerOffTimer);
 
2314
        INIT_WORK(&usbvision->powerOffWork, call_usbvision_power_off);
 
2315
        (void) schedule_work(&usbvision->powerOffWork);
 
2316
}
 
2317
 
 
2318
void usbvision_init_powerOffTimer(struct usb_usbvision *usbvision)
 
2319
{
 
2320
        init_timer(&usbvision->powerOffTimer);
 
2321
        usbvision->powerOffTimer.data = (long) usbvision;
 
2322
        usbvision->powerOffTimer.function = usbvision_powerOffTimer;
 
2323
}
 
2324
 
 
2325
void usbvision_set_powerOffTimer(struct usb_usbvision *usbvision)
 
2326
{
 
2327
        mod_timer(&usbvision->powerOffTimer, jiffies + USBVISION_POWEROFF_TIME);
 
2328
}
 
2329
 
 
2330
void usbvision_reset_powerOffTimer(struct usb_usbvision *usbvision)
 
2331
{
 
2332
        if (timer_pending(&usbvision->powerOffTimer)) {
 
2333
                del_timer(&usbvision->powerOffTimer);
 
2334
        }
 
2335
}
 
2336
 
 
2337
/*
 
2338
 * usbvision_begin_streaming()
 
2339
 * Sure you have to put bit 7 to 0, if not incoming frames are droped, but no
 
2340
 * idea about the rest
 
2341
 */
 
2342
int usbvision_begin_streaming(struct usb_usbvision *usbvision)
 
2343
{
 
2344
        int errCode = 0;
 
2345
 
 
2346
        if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
 
2347
                usbvision_init_compression(usbvision);
 
2348
        }
 
2349
        errCode = usbvision_write_reg(usbvision, USBVISION_VIN_REG2, USBVISION_NOHVALID |
 
2350
                                                                                usbvision->Vin_Reg2_Preset);
 
2351
        return errCode;
 
2352
}
 
2353
 
 
2354
/*
 
2355
 * usbvision_restart_isoc()
 
2356
 * Not sure yet if touching here PWR_REG make loose the config
 
2357
 */
 
2358
 
 
2359
int usbvision_restart_isoc(struct usb_usbvision *usbvision)
 
2360
{
 
2361
        int ret;
 
2362
 
 
2363
        if (
 
2364
            (ret =
 
2365
             usbvision_write_reg(usbvision, USBVISION_PWR_REG,
 
2366
                              USBVISION_SSPND_EN | USBVISION_PWR_VID)) < 0)
 
2367
                return ret;
 
2368
        if (
 
2369
            (ret =
 
2370
             usbvision_write_reg(usbvision, USBVISION_PWR_REG,
 
2371
                              USBVISION_SSPND_EN | USBVISION_PWR_VID |
 
2372
                              USBVISION_RES2)) < 0)
 
2373
                return ret;
 
2374
        if (
 
2375
            (ret =
 
2376
             usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
 
2377
                              USBVISION_KEEP_BLANK | USBVISION_NOHVALID |
 
2378
                                  usbvision->Vin_Reg2_Preset)) < 0) return ret;
 
2379
 
 
2380
        /* TODO: schedule timeout */
 
2381
        while ((usbvision_read_reg(usbvision, USBVISION_STATUS_REG) & 0x01) != 1);
 
2382
 
 
2383
        return 0;
 
2384
}
 
2385
 
 
2386
int usbvision_audio_off(struct usb_usbvision *usbvision)
 
2387
{
 
2388
        if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, USBVISION_AUDIO_MUTE) < 0) {
 
2389
                printk(KERN_ERR "usbvision_audio_off: can't wirte reg\n");
 
2390
                return -1;
 
2391
        }
 
2392
        usbvision->AudioMute = 0;
 
2393
        usbvision->AudioChannel = USBVISION_AUDIO_MUTE;
 
2394
        return 0;
 
2395
}
 
2396
 
 
2397
int usbvision_set_audio(struct usb_usbvision *usbvision, int AudioChannel)
 
2398
{
 
2399
        if (!usbvision->AudioMute) {
 
2400
                if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, AudioChannel) < 0) {
 
2401
                        printk(KERN_ERR "usbvision_set_audio: can't write iopin register for audio switching\n");
 
2402
                        return -1;
 
2403
                }
 
2404
        }
 
2405
        usbvision->AudioChannel = AudioChannel;
 
2406
        return 0;
 
2407
}
 
2408
 
 
2409
int usbvision_setup(struct usb_usbvision *usbvision,int format)
 
2410
{
 
2411
        usbvision_set_video_format(usbvision, format);
 
2412
        usbvision_set_dram_settings(usbvision);
 
2413
        usbvision_set_compress_params(usbvision);
 
2414
        usbvision_set_input(usbvision);
 
2415
        usbvision_set_output(usbvision, MAX_USB_WIDTH, MAX_USB_HEIGHT);
 
2416
        usbvision_restart_isoc(usbvision);
 
2417
 
 
2418
        /* cosas del PCM */
 
2419
        return USBVISION_IS_OPERATIONAL(usbvision);
 
2420
}
 
2421
 
 
2422
int usbvision_set_alternate(struct usb_usbvision *dev)
 
2423
{
 
2424
        int errCode, prev_alt = dev->ifaceAlt;
 
2425
        int i;
 
2426
 
 
2427
        dev->ifaceAlt=0;
 
2428
        for(i=0;i< dev->num_alt; i++)
 
2429
                if(dev->alt_max_pkt_size[i]>dev->alt_max_pkt_size[dev->ifaceAlt])
 
2430
                        dev->ifaceAlt=i;
 
2431
 
 
2432
        if (dev->ifaceAlt != prev_alt) {
 
2433
                dev->isocPacketSize = dev->alt_max_pkt_size[dev->ifaceAlt];
 
2434
                PDEBUG(DBG_FUNC,"setting alternate %d with wMaxPacketSize=%u", dev->ifaceAlt,dev->isocPacketSize);
 
2435
                errCode = usb_set_interface(dev->dev, dev->iface, dev->ifaceAlt);
 
2436
                if (errCode < 0) {
 
2437
                        dev_err(&dev->dev->dev,
 
2438
                                "cannot change alternate number to %d (error=%i)\n",
 
2439
                                        dev->ifaceAlt, errCode);
 
2440
                        return errCode;
 
2441
                }
 
2442
        }
 
2443
 
 
2444
        PDEBUG(DBG_ISOC, "ISO Packet Length:%d", dev->isocPacketSize);
 
2445
 
 
2446
        return 0;
 
2447
}
 
2448
 
 
2449
/*
 
2450
 * usbvision_init_isoc()
 
2451
 *
 
2452
 */
 
2453
int usbvision_init_isoc(struct usb_usbvision *usbvision)
 
2454
{
 
2455
        struct usb_device *dev = usbvision->dev;
 
2456
        int bufIdx, errCode, regValue;
 
2457
        int sb_size;
 
2458
 
 
2459
        if (!USBVISION_IS_OPERATIONAL(usbvision))
 
2460
                return -EFAULT;
 
2461
 
 
2462
        usbvision->curFrame = NULL;
 
2463
        scratch_reset(usbvision);
 
2464
 
 
2465
        /* Alternate interface 1 is is the biggest frame size */
 
2466
        errCode = usbvision_set_alternate(usbvision);
 
2467
        if (errCode < 0) {
 
2468
                usbvision->last_error = errCode;
 
2469
                return -EBUSY;
 
2470
        }
 
2471
        sb_size = USBVISION_URB_FRAMES * usbvision->isocPacketSize;
 
2472
 
 
2473
        regValue = (16 - usbvision_read_reg(usbvision,
 
2474
                                            USBVISION_ALTER_REG)) & 0x0F;
 
2475
 
 
2476
        usbvision->usb_bandwidth = regValue >> 1;
 
2477
        PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec",
 
2478
               usbvision->usb_bandwidth);
 
2479
 
 
2480
 
 
2481
 
 
2482
        /* We double buffer the Iso lists */
 
2483
 
 
2484
        for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
 
2485
                int j, k;
 
2486
                struct urb *urb;
 
2487
 
 
2488
                urb = usb_alloc_urb(USBVISION_URB_FRAMES, GFP_KERNEL);
 
2489
                if (urb == NULL) {
 
2490
                        dev_err(&usbvision->dev->dev,
 
2491
                                "%s: usb_alloc_urb() failed\n", __func__);
 
2492
                        return -ENOMEM;
 
2493
                }
 
2494
                usbvision->sbuf[bufIdx].urb = urb;
 
2495
                usbvision->sbuf[bufIdx].data =
 
2496
                        usb_buffer_alloc(usbvision->dev,
 
2497
                                         sb_size,
 
2498
                                         GFP_KERNEL,
 
2499
                                         &urb->transfer_dma);
 
2500
                urb->dev = dev;
 
2501
                urb->context = usbvision;
 
2502
                urb->pipe = usb_rcvisocpipe(dev, usbvision->video_endp);
 
2503
                urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
 
2504
                urb->interval = 1;
 
2505
                urb->transfer_buffer = usbvision->sbuf[bufIdx].data;
 
2506
                urb->complete = usbvision_isocIrq;
 
2507
                urb->number_of_packets = USBVISION_URB_FRAMES;
 
2508
                urb->transfer_buffer_length =
 
2509
                    usbvision->isocPacketSize * USBVISION_URB_FRAMES;
 
2510
                for (j = k = 0; j < USBVISION_URB_FRAMES; j++,
 
2511
                     k += usbvision->isocPacketSize) {
 
2512
                        urb->iso_frame_desc[j].offset = k;
 
2513
                        urb->iso_frame_desc[j].length =
 
2514
                                usbvision->isocPacketSize;
 
2515
                }
 
2516
        }
 
2517
 
 
2518
        /* Submit all URBs */
 
2519
        for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
 
2520
                        errCode = usb_submit_urb(usbvision->sbuf[bufIdx].urb,
 
2521
                                                 GFP_KERNEL);
 
2522
                if (errCode) {
 
2523
                        dev_err(&usbvision->dev->dev,
 
2524
                                "%s: usb_submit_urb(%d) failed: error %d\n",
 
2525
                                        __func__, bufIdx, errCode);
 
2526
                }
 
2527
        }
 
2528
 
 
2529
        usbvision->streaming = Stream_Idle;
 
2530
        PDEBUG(DBG_ISOC, "%s: streaming=1 usbvision->video_endp=$%02x",
 
2531
               __func__,
 
2532
               usbvision->video_endp);
 
2533
        return 0;
 
2534
}
 
2535
 
 
2536
/*
 
2537
 * usbvision_stop_isoc()
 
2538
 *
 
2539
 * This procedure stops streaming and deallocates URBs. Then it
 
2540
 * activates zero-bandwidth alt. setting of the video interface.
 
2541
 *
 
2542
 */
 
2543
void usbvision_stop_isoc(struct usb_usbvision *usbvision)
 
2544
{
 
2545
        int bufIdx, errCode, regValue;
 
2546
        int sb_size = USBVISION_URB_FRAMES * usbvision->isocPacketSize;
 
2547
 
 
2548
        if ((usbvision->streaming == Stream_Off) || (usbvision->dev == NULL))
 
2549
                return;
 
2550
 
 
2551
        /* Unschedule all of the iso td's */
 
2552
        for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
 
2553
                usb_kill_urb(usbvision->sbuf[bufIdx].urb);
 
2554
                if (usbvision->sbuf[bufIdx].data){
 
2555
                        usb_buffer_free(usbvision->dev,
 
2556
                                        sb_size,
 
2557
                                        usbvision->sbuf[bufIdx].data,
 
2558
                                        usbvision->sbuf[bufIdx].urb->transfer_dma);
 
2559
                }
 
2560
                usb_free_urb(usbvision->sbuf[bufIdx].urb);
 
2561
                usbvision->sbuf[bufIdx].urb = NULL;
 
2562
        }
 
2563
 
 
2564
        PDEBUG(DBG_ISOC, "%s: streaming=Stream_Off\n", __func__);
 
2565
        usbvision->streaming = Stream_Off;
 
2566
 
 
2567
        if (!usbvision->remove_pending) {
 
2568
 
 
2569
                /* Set packet size to 0 */
 
2570
                usbvision->ifaceAlt=0;
 
2571
                errCode = usb_set_interface(usbvision->dev, usbvision->iface,
 
2572
                                            usbvision->ifaceAlt);
 
2573
                if (errCode < 0) {
 
2574
                        dev_err(&usbvision->dev->dev,
 
2575
                                "%s: usb_set_interface() failed: error %d\n",
 
2576
                                        __func__, errCode);
 
2577
                        usbvision->last_error = errCode;
 
2578
                }
 
2579
                regValue = (16-usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F;
 
2580
                usbvision->isocPacketSize =
 
2581
                        (regValue == 0) ? 0 : (regValue * 64) - 1;
 
2582
                PDEBUG(DBG_ISOC, "ISO Packet Length:%d",
 
2583
                       usbvision->isocPacketSize);
 
2584
 
 
2585
                usbvision->usb_bandwidth = regValue >> 1;
 
2586
                PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec",
 
2587
                       usbvision->usb_bandwidth);
 
2588
        }
 
2589
}
 
2590
 
 
2591
int usbvision_muxsel(struct usb_usbvision *usbvision, int channel)
 
2592
{
 
2593
        /* inputs #0 and #3 are constant for every SAA711x. */
 
2594
        /* inputs #1 and #2 are variable for SAA7111 and SAA7113 */
 
2595
        int mode[4]= {SAA7115_COMPOSITE0, 0, 0, SAA7115_COMPOSITE3};
 
2596
        int audio[]= {1, 0, 0, 0};
 
2597
        //channel 0 is TV with audiochannel 1 (tuner mono)
 
2598
        //channel 1 is Composite with audio channel 0 (line in)
 
2599
        //channel 2 is S-Video with audio channel 0 (line in)
 
2600
        //channel 3 is additional video inputs to the device with audio channel 0 (line in)
 
2601
 
 
2602
        RESTRICT_TO_RANGE(channel, 0, usbvision->video_inputs);
 
2603
        usbvision->ctl_input = channel;
 
2604
 
 
2605
        // set the new channel
 
2606
        // Regular USB TV Tuners -> channel: 0 = Television, 1 = Composite, 2 = S-Video
 
2607
        // Four video input devices -> channel: 0 = Chan White, 1 = Chan Green, 2 = Chan Yellow, 3 = Chan Red
 
2608
 
 
2609
        switch (usbvision_device_data[usbvision->DevModel].Codec) {
 
2610
                case CODEC_SAA7113:
 
2611
                        mode[1] = SAA7115_COMPOSITE2;
 
2612
                        if (SwitchSVideoInput) {
 
2613
                                /* To handle problems with S-Video Input for
 
2614
                                 * some devices.  Use SwitchSVideoInput
 
2615
                                 * parameter when loading the module.*/
 
2616
                                mode[2] = SAA7115_COMPOSITE1;
 
2617
                        }
 
2618
                        else {
 
2619
                                mode[2] = SAA7115_SVIDEO1;
 
2620
                        }
 
2621
                        break;
 
2622
                case CODEC_SAA7111:
 
2623
                default:
 
2624
                        /* modes for saa7111 */
 
2625
                        mode[1] = SAA7115_COMPOSITE1;
 
2626
                        mode[2] = SAA7115_SVIDEO1;
 
2627
                        break;
 
2628
        }
 
2629
        call_all(usbvision, video, s_routing, mode[channel], 0, 0);
 
2630
        usbvision_set_audio(usbvision, audio[channel]);
 
2631
        return 0;
 
2632
}
 
2633
 
 
2634
/*
 
2635
 * Overrides for Emacs so that we follow Linus's tabbing style.
 
2636
 * ---------------------------------------------------------------------------
 
2637
 * Local variables:
 
2638
 * c-basic-offset: 8
 
2639
 * End:
 
2640
 */