drivers/usb/media/ov511.c

   1 /*
   2  * OmniVision OV511 Camera-to-USB Bridge Driver
   3  *
   4  * Copyright (c) 1999-2003 Mark W. McClelland
   5  * Original decompression code Copyright 1998-2000 OmniVision Technologies
   6  * Many improvements by Bret Wallach <bwallac1@san.rr.com>
   7  * Color fixes by by Orion Sky Lawlor <olawlor@acm.org> (2/26/2000)
   8  * Snapshot code by Kevin Moore
   9  * OV7620 fixes by Charl P. Botha <cpbotha@ieee.org>
  10  * Changes by Claudio Matsuoka <claudio@conectiva.com>
  11  * Original SAA7111A code by Dave Perks <dperks@ibm.net>
  12  * URB error messages from pwc driver by Nemosoft
  13  * generic_ioctl() code from videodev.c by Gerd Knorr and Alan Cox
  14  * Memory management (rvmalloc) code from bttv driver, by Gerd Knorr and others
  15  *
  16  * Based on the Linux CPiA driver written by Peter Pregler,
  17  * Scott J. Bertin and Johannes Erdfelt.
  18  *
  19  * Please see the file: Documentation/usb/ov511.txt
  20  * and the website at:  http://alpha.dyndns.org/ov511
  21  * for more info.
  22  *
  23  * This program is free software; you can redistribute it and/or modify it
  24  * under the terms of the GNU General Public License as published by the
  25  * Free Software Foundation; either version 2 of the License, or (at your
  26  * option) any later version.
  27  *
  28  * This program is distributed in the hope that it will be useful, but
  29  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  30  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  31  * for more details.
  32  *
  33  * You should have received a copy of the GNU General Public License
  34  * along with this program; if not, write to the Free Software Foundation,
  35  * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  36  */
  37
  38 #include <linux/config.h>
  39 #include <linux/module.h>
  40 #include <linux/init.h>
  41 #include <linux/vmalloc.h>
  42 #include <linux/slab.h>
  43 #include <linux/ctype.h>
  44 #include <linux/pagemap.h>
  45 #include <asm/semaphore.h>
  46 #include <asm/processor.h>
  47 #include <linux/mm.h>
  48 #include <linux/device.h>
  49
  50 #if defined (__i386__)
  51         #include <asm/cpufeature.h>
  52 #endif
  53
  54 #include "ov511.h"
  55
  56 /*
  57  * Version Information
  58  */
  59 #define DRIVER_VERSION "v1.64 for Linux 2.5"
  60 #define EMAIL "mark@alpha.dyndns.org"
  61 #define DRIVER_AUTHOR "Mark McClelland <mark@alpha.dyndns.org> & Bret Wallach \
  62         & Orion Sky Lawlor <olawlor@acm.org> & Kevin Moore & Charl P. Botha \
  63         <cpbotha@ieee.org> & Claudio Matsuoka <claudio@conectiva.com>"
  64 #define DRIVER_DESC "ov511 USB Camera Driver"
  65
  66 #define OV511_I2C_RETRIES 3
  67 #define ENABLE_Y_QUANTABLE 1
  68 #define ENABLE_UV_QUANTABLE 1
  69
  70 #define OV511_MAX_UNIT_VIDEO 16
  71
  72 /* Pixel count * bytes per YUV420 pixel (1.5) */
  73 #define MAX_FRAME_SIZE(w, h) ((w) * (h) * 3 / 2)
  74
  75 #define MAX_DATA_SIZE(w, h) (MAX_FRAME_SIZE(w, h) + sizeof(struct timeval))
  76
  77 /* Max size * bytes per YUV420 pixel (1.5) + one extra isoc frame for safety */
  78 #define MAX_RAW_DATA_SIZE(w, h) ((w) * (h) * 3 / 2 + 1024)
  79
  80 #define FATAL_ERROR(rc) ((rc) < 0 && (rc) != -EPERM)
  81
  82 /**********************************************************************
  83  * Module Parameters
  84  * (See ov511.txt for detailed descriptions of these)
  85  **********************************************************************/
  86
  87 /* These variables (and all static globals) default to zero */
  88 static int autobright           = 1;
  89 static int autogain             = 1;
  90 static int autoexp              = 1;
  91 static int debug;
  92 static int snapshot;
  93 static int cams                 = 1;
  94 static int compress;
  95 static int testpat;
  96 static int dumppix;
  97 static int led                  = 1;
  98 static int dump_bridge;
  99 static int dump_sensor;
 100 static int printph;
 101 static int phy                  = 0x1f;
 102 static int phuv                 = 0x05;
 103 static int pvy                  = 0x06;
 104 static int pvuv                 = 0x06;
 105 static int qhy                  = 0x14;
 106 static int qhuv                 = 0x03;
 107 static int qvy                  = 0x04;
 108 static int qvuv                 = 0x04;
 109 static int lightfreq;
 110 static int bandingfilter;
 111 static int clockdiv             = -1;
 112 static int packetsize           = -1;
 113 static int framedrop            = -1;
 114 static int fastset;
 115 static int force_palette;
 116 static int backlight;
 117 static int unit_video[OV511_MAX_UNIT_VIDEO];
 118 static int remove_zeros;
 119 static int mirror;
 120 static int ov518_color;
 121
 122 module_param(autobright, int, 0);
 123 MODULE_PARM_DESC(autobright, "Sensor automatically changes brightness");
 124 module_param(autogain, int, 0);
 125 MODULE_PARM_DESC(autogain, "Sensor automatically changes gain");
 126 module_param(autoexp, int, 0);
 127 MODULE_PARM_DESC(autoexp, "Sensor automatically changes exposure");
 128 module_param(debug, int, 0);
 129 MODULE_PARM_DESC(debug,
 130   "Debug level: 0=none, 1=inits, 2=warning, 3=config, 4=functions, 5=max");
 131 module_param(snapshot, int, 0);
 132 MODULE_PARM_DESC(snapshot, "Enable snapshot mode");
 133 module_param(cams, int, 0);
 134 MODULE_PARM_DESC(cams, "Number of simultaneous cameras");
 135 module_param(compress, int, 0);
 136 MODULE_PARM_DESC(compress, "Turn on compression");
 137 module_param(testpat, int, 0);
 138 MODULE_PARM_DESC(testpat,
 139   "Replace image with vertical bar testpattern (only partially working)");
 140 module_param(dumppix, int, 0);
 141 MODULE_PARM_DESC(dumppix, "Dump raw pixel data");
 142 module_param(led, int, 0);
 143 MODULE_PARM_DESC(led,
 144   "LED policy (OV511+ or later). 0=off, 1=on (default), 2=auto (on when open)");
 145 module_param(dump_bridge, int, 0);
 146 MODULE_PARM_DESC(dump_bridge, "Dump the bridge registers");
 147 module_param(dump_sensor, int, 0);
 148 MODULE_PARM_DESC(dump_sensor, "Dump the sensor registers");
 149 module_param(printph, int, 0);
 150 MODULE_PARM_DESC(printph, "Print frame start/end headers");
 151 module_param(phy, int, 0);
 152 MODULE_PARM_DESC(phy, "Prediction range (horiz. Y)");
 153 module_param(phuv, int, 0);
 154 MODULE_PARM_DESC(phuv, "Prediction range (horiz. UV)");
 155 module_param(pvy, int, 0);
 156 MODULE_PARM_DESC(pvy, "Prediction range (vert. Y)");
 157 module_param(pvuv, int, 0);
 158 MODULE_PARM_DESC(pvuv, "Prediction range (vert. UV)");
 159 module_param(qhy, int, 0);
 160 MODULE_PARM_DESC(qhy, "Quantization threshold (horiz. Y)");
 161 module_param(qhuv, int, 0);
 162 MODULE_PARM_DESC(qhuv, "Quantization threshold (horiz. UV)");
 163 module_param(qvy, int, 0);
 164 MODULE_PARM_DESC(qvy, "Quantization threshold (vert. Y)");
 165 module_param(qvuv, int, 0);
 166 MODULE_PARM_DESC(qvuv, "Quantization threshold (vert. UV)");
 167 module_param(lightfreq, int, 0);
 168 MODULE_PARM_DESC(lightfreq,
 169   "Light frequency. Set to 50 or 60 Hz, or zero for default settings");
 170 module_param(bandingfilter, int, 0);
 171 MODULE_PARM_DESC(bandingfilter,
 172   "Enable banding filter (to reduce effects of fluorescent lighting)");
 173 module_param(clockdiv, int, 0);
 174 MODULE_PARM_DESC(clockdiv, "Force pixel clock divisor to a specific value");
 175 module_param(packetsize, int, 0);
 176 MODULE_PARM_DESC(packetsize, "Force a specific isoc packet size");
 177 module_param(framedrop, int, 0);
 178 MODULE_PARM_DESC(framedrop, "Force a specific frame drop register setting");
 179 module_param(fastset, int, 0);
 180 MODULE_PARM_DESC(fastset, "Allows picture settings to take effect immediately");
 181 module_param(force_palette, int, 0);
 182 MODULE_PARM_DESC(force_palette, "Force the palette to a specific value");
 183 module_param(backlight, int, 0);
 184 MODULE_PARM_DESC(backlight, "For objects that are lit from behind");
 185 static int num_uv;
 186 module_param_array(unit_video, int, &num_uv, 0);
 187 MODULE_PARM_DESC(unit_video,
 188   "Force use of specific minor number(s). 0 is not allowed.");
 189 module_param(remove_zeros, int, 0);
 190 MODULE_PARM_DESC(remove_zeros,
 191   "Remove zero-padding from uncompressed incoming data");
 192 module_param(mirror, int, 0);
 193 MODULE_PARM_DESC(mirror, "Reverse image horizontally");
 194 module_param(ov518_color, int, 0);
 195 MODULE_PARM_DESC(ov518_color, "Enable OV518 color (experimental)");
 196
 197 MODULE_AUTHOR(DRIVER_AUTHOR);
 198 MODULE_DESCRIPTION(DRIVER_DESC);
 199 MODULE_LICENSE("GPL");
 200
 201 /**********************************************************************
 202  * Miscellaneous Globals
 203  **********************************************************************/
 204
 205 static struct usb_driver ov511_driver;
 206
 207 static struct ov51x_decomp_ops *ov511_decomp_ops;
 208 static struct ov51x_decomp_ops *ov511_mmx_decomp_ops;
 209 static struct ov51x_decomp_ops *ov518_decomp_ops;
 210 static struct ov51x_decomp_ops *ov518_mmx_decomp_ops;
 211
 212 /* Number of times to retry a failed I2C transaction. Increase this if you
 213  * are getting "Failed to read sensor ID..." */
 214 static int i2c_detect_tries = 5;
 215
 216 /* MMX support is present in kernel and CPU. Checked upon decomp module load. */
 217 #if defined(__i386__) || defined(__x86_64__)
 218 #define ov51x_mmx_available (cpu_has_mmx)
 219 #else
 220 #define ov51x_mmx_available (0)
 221 #endif
 222
 223 static struct usb_device_id device_table [] = {
 224         { USB_DEVICE(VEND_OMNIVISION, PROD_OV511) },
 225         { USB_DEVICE(VEND_OMNIVISION, PROD_OV511PLUS) },
 226         { USB_DEVICE(VEND_OMNIVISION, PROD_OV518) },
 227         { USB_DEVICE(VEND_OMNIVISION, PROD_OV518PLUS) },
 228         { USB_DEVICE(VEND_MATTEL, PROD_ME2CAM) },
 229         { }  /* Terminating entry */
 230 };
 231
 232 MODULE_DEVICE_TABLE (usb, device_table);
 233
 234 static unsigned char yQuanTable511[] = OV511_YQUANTABLE;
 235 static unsigned char uvQuanTable511[] = OV511_UVQUANTABLE;
 236 static unsigned char yQuanTable518[] = OV518_YQUANTABLE;
 237 static unsigned char uvQuanTable518[] = OV518_UVQUANTABLE;
 238
 239 /**********************************************************************
 240  * Symbolic Names
 241  **********************************************************************/
 242
 243 /* Known OV511-based cameras */
 244 static struct symbolic_list camlist[] = {
 245         {   0, "Generic Camera (no ID)" },
 246         {   1, "Mustek WCam 3X" },
 247         {   3, "D-Link DSB-C300" },
 248         {   4, "Generic OV511/OV7610" },
 249         {   5, "Puretek PT-6007" },
 250         {   6, "Lifeview USB Life TV (NTSC)" },
 251         {  21, "Creative Labs WebCam 3" },
 252         {  22, "Lifeview USB Life TV (PAL D/K+B/G)" },
 253         {  36, "Koala-Cam" },
 254         {  38, "Lifeview USB Life TV (PAL)" },
 255         {  41, "Samsung Anycam MPC-M10" },
 256         {  43, "Mtekvision Zeca MV402" },
 257         {  46, "Suma eON" },
 258         {  70, "Lifeview USB Life TV (PAL/SECAM)" },
 259         { 100, "Lifeview RoboCam" },
 260         { 102, "AverMedia InterCam Elite" },
 261         { 112, "MediaForte MV300" },    /* or OV7110 evaluation kit */
 262         { 134, "Ezonics EZCam II" },
 263         { 192, "Webeye 2000B" },
 264         { 253, "Alpha Vision Tech. AlphaCam SE" },
 265         {  -1, NULL }
 266 };
 267
 268 /* Video4Linux1 Palettes */
 269 static struct symbolic_list v4l1_plist[] = {
 270         { VIDEO_PALETTE_GREY,   "GREY" },
 271         { VIDEO_PALETTE_HI240,  "HI240" },
 272         { VIDEO_PALETTE_RGB565, "RGB565" },
 273         { VIDEO_PALETTE_RGB24,  "RGB24" },
 274         { VIDEO_PALETTE_RGB32,  "RGB32" },
 275         { VIDEO_PALETTE_RGB555, "RGB555" },
 276         { VIDEO_PALETTE_YUV422, "YUV422" },
 277         { VIDEO_PALETTE_YUYV,   "YUYV" },
 278         { VIDEO_PALETTE_UYVY,   "UYVY" },
 279         { VIDEO_PALETTE_YUV420, "YUV420" },
 280         { VIDEO_PALETTE_YUV411, "YUV411" },
 281         { VIDEO_PALETTE_RAW,    "RAW" },
 282         { VIDEO_PALETTE_YUV422P,"YUV422P" },
 283         { VIDEO_PALETTE_YUV411P,"YUV411P" },
 284         { VIDEO_PALETTE_YUV420P,"YUV420P" },
 285         { VIDEO_PALETTE_YUV410P,"YUV410P" },
 286         { -1, NULL }
 287 };
 288
 289 static struct symbolic_list brglist[] = {
 290         { BRG_OV511,            "OV511" },
 291         { BRG_OV511PLUS,        "OV511+" },
 292         { BRG_OV518,            "OV518" },
 293         { BRG_OV518PLUS,        "OV518+" },
 294         { -1, NULL }
 295 };
 296
 297 static struct symbolic_list senlist[] = {
 298         { SEN_OV76BE,   "OV76BE" },
 299         { SEN_OV7610,   "OV7610" },
 300         { SEN_OV7620,   "OV7620" },
 301         { SEN_OV7620AE, "OV7620AE" },
 302         { SEN_OV6620,   "OV6620" },
 303         { SEN_OV6630,   "OV6630" },
 304         { SEN_OV6630AE, "OV6630AE" },
 305         { SEN_OV6630AF, "OV6630AF" },
 306         { SEN_OV8600,   "OV8600" },
 307         { SEN_KS0127,   "KS0127" },
 308         { SEN_KS0127B,  "KS0127B" },
 309         { SEN_SAA7111A, "SAA7111A" },
 310         { -1, NULL }
 311 };
 312
 313 /* URB error codes: */
 314 static struct symbolic_list urb_errlist[] = {
 315         { -ENOSR,       "Buffer error (overrun)" },
 316         { -EPIPE,       "Stalled (device not responding)" },
 317         { -EOVERFLOW,   "Babble (bad cable?)" },
 318         { -EPROTO,      "Bit-stuff error (bad cable?)" },
 319         { -EILSEQ,      "CRC/Timeout" },
 320         { -ETIMEDOUT,   "NAK (device does not respond)" },
 321         { -1, NULL }
 322 };
 323
 324 /**********************************************************************
 325  * Memory management
 326  **********************************************************************/
 327 static void *
 328 rvmalloc(unsigned long size)
 329 {
 330         void *mem;
 331         unsigned long adr;
 332
 333         size = PAGE_ALIGN(size);
 334         mem = vmalloc_32(size);
 335         if (!mem)
 336                 return NULL;
 337
 338         memset(mem, 0, size); /* Clear the ram out, no junk to the user */
 339         adr = (unsigned long) mem;
 340         while (size > 0) {
 341                 SetPageReserved(vmalloc_to_page((void *)adr));
 342                 adr += PAGE_SIZE;
 343                 size -= PAGE_SIZE;
 344         }
 345
 346         return mem;
 347 }
 348
 349 static void
 350 rvfree(void *mem, unsigned long size)
 351 {
 352         unsigned long adr;
 353
 354         if (!mem)
 355                 return;
 356
 357         adr = (unsigned long) mem;
 358         while ((long) size > 0) {
 359                 ClearPageReserved(vmalloc_to_page((void *)adr));
 360                 adr += PAGE_SIZE;
 361                 size -= PAGE_SIZE;
 362         }
 363         vfree(mem);
 364 }
 365
 366 /**********************************************************************
 367  *
 368  * Register I/O
 369  *
 370  **********************************************************************/
 371
 372 /* Write an OV51x register */
 373 static int
 374 reg_w(struct usb_ov511 *ov, unsigned char reg, unsigned char value)
 375 {
 376         int rc;
 377
 378         PDEBUG(5, "0x%02X:0x%02X", reg, value);
 379
 380         down(&ov->cbuf_lock);
 381         ov->cbuf[0] = value;
 382         rc = usb_control_msg(ov->dev,
 383                              usb_sndctrlpipe(ov->dev, 0),
 384                              (ov->bclass == BCL_OV518)?1:2 /* REG_IO */,
 385                              USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 386                              0, (__u16)reg, &ov->cbuf[0], 1, 1000);
 387         up(&ov->cbuf_lock);
 388
 389         if (rc < 0)
 390                 err("reg write: error %d: %s", rc, symbolic(urb_errlist, rc));
 391
 392         return rc;
 393 }
 394
 395 /* Read from an OV51x register */
 396 /* returns: negative is error, pos or zero is data */
 397 static int
 398 reg_r(struct usb_ov511 *ov, unsigned char reg)
 399 {
 400         int rc;
 401
 402         down(&ov->cbuf_lock);
 403         rc = usb_control_msg(ov->dev,
 404                              usb_rcvctrlpipe(ov->dev, 0),
 405                              (ov->bclass == BCL_OV518)?1:3 /* REG_IO */,
 406                              USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 407                              0, (__u16)reg, &ov->cbuf[0], 1, 1000);
 408
 409         if (rc < 0) {
 410                 err("reg read: error %d: %s", rc, symbolic(urb_errlist, rc));
 411         } else {
 412                 rc = ov->cbuf[0];
 413                 PDEBUG(5, "0x%02X:0x%02X", reg, ov->cbuf[0]);
 414         }
 415
 416         up(&ov->cbuf_lock);
 417
 418         return rc;
 419 }
 420
 421 /*
 422  * Writes bits at positions specified by mask to an OV51x reg. Bits that are in
 423  * the same position as 1's in "mask" are cleared and set to "value". Bits
 424  * that are in the same position as 0's in "mask" are preserved, regardless
 425  * of their respective state in "value".
 426  */
 427 static int
 428 reg_w_mask(struct usb_ov511 *ov,
 429            unsigned char reg,
 430            unsigned char value,
 431            unsigned char mask)
 432 {
 433         int ret;
 434         unsigned char oldval, newval;
 435
 436         ret = reg_r(ov, reg);
 437         if (ret < 0)
 438                 return ret;
 439
 440         oldval = (unsigned char) ret;
 441         oldval &= (~mask);              /* Clear the masked bits */
 442         value &= mask;                  /* Enforce mask on value */
 443         newval = oldval | value;        /* Set the desired bits */
 444
 445         return (reg_w(ov, reg, newval));
 446 }
 447
 448 /*
 449  * Writes multiple (n) byte value to a single register. Only valid with certain
 450  * registers (0x30 and 0xc4 - 0xce).
 451  */
 452 static int
 453 ov518_reg_w32(struct usb_ov511 *ov, unsigned char reg, u32 val, int n)
 454 {
 455         int rc;
 456
 457         PDEBUG(5, "0x%02X:%7d, n=%d", reg, val, n);
 458
 459         down(&ov->cbuf_lock);
 460
 461         *((__le32 *)ov->cbuf) = __cpu_to_le32(val);
 462
 463         rc = usb_control_msg(ov->dev,
 464                              usb_sndctrlpipe(ov->dev, 0),
 465                              1 /* REG_IO */,
 466                              USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 467                              0, (__u16)reg, ov->cbuf, n, 1000);
 468         up(&ov->cbuf_lock);
 469
 470         if (rc < 0)
 471                 err("reg write multiple: error %d: %s", rc,
 472                     symbolic(urb_errlist, rc));
 473
 474         return rc;
 475 }
 476
 477 static int
 478 ov511_upload_quan_tables(struct usb_ov511 *ov)
 479 {
 480         unsigned char *pYTable = yQuanTable511;
 481         unsigned char *pUVTable = uvQuanTable511;
 482         unsigned char val0, val1;
 483         int i, rc, reg = R511_COMP_LUT_BEGIN;
 484
 485         PDEBUG(4, "Uploading quantization tables");
 486
 487         for (i = 0; i < OV511_QUANTABLESIZE / 2; i++) {
 488                 if (ENABLE_Y_QUANTABLE) {
 489                         val0 = *pYTable++;
 490                         val1 = *pYTable++;
 491                         val0 &= 0x0f;
 492                         val1 &= 0x0f;
 493                         val0 |= val1 << 4;
 494                         rc = reg_w(ov, reg, val0);
 495                         if (rc < 0)
 496                                 return rc;
 497                 }
 498
 499                 if (ENABLE_UV_QUANTABLE) {
 500                         val0 = *pUVTable++;
 501                         val1 = *pUVTable++;
 502                         val0 &= 0x0f;
 503                         val1 &= 0x0f;
 504                         val0 |= val1 << 4;
 505                         rc = reg_w(ov, reg + OV511_QUANTABLESIZE/2, val0);
 506                         if (rc < 0)
 507                                 return rc;
 508                 }
 509
 510                 reg++;
 511         }
 512
 513         return 0;
 514 }
 515
 516 /* OV518 quantization tables are 8x4 (instead of 8x8) */
 517 static int
 518 ov518_upload_quan_tables(struct usb_ov511 *ov)
 519 {
 520         unsigned char *pYTable = yQuanTable518;
 521         unsigned char *pUVTable = uvQuanTable518;
 522         unsigned char val0, val1;
 523         int i, rc, reg = R511_COMP_LUT_BEGIN;
 524
 525         PDEBUG(4, "Uploading quantization tables");
 526
 527         for (i = 0; i < OV518_QUANTABLESIZE / 2; i++) {
 528                 if (ENABLE_Y_QUANTABLE) {
 529                         val0 = *pYTable++;
 530                         val1 = *pYTable++;
 531                         val0 &= 0x0f;
 532                         val1 &= 0x0f;
 533                         val0 |= val1 << 4;
 534                         rc = reg_w(ov, reg, val0);
 535                         if (rc < 0)
 536                                 return rc;
 537                 }
 538
 539                 if (ENABLE_UV_QUANTABLE) {
 540                         val0 = *pUVTable++;
 541                         val1 = *pUVTable++;
 542                         val0 &= 0x0f;
 543                         val1 &= 0x0f;
 544                         val0 |= val1 << 4;
 545                         rc = reg_w(ov, reg + OV518_QUANTABLESIZE/2, val0);
 546                         if (rc < 0)
 547                                 return rc;
 548                 }
 549
 550                 reg++;
 551         }
 552
 553         return 0;
 554 }
 555
 556 static int
 557 ov51x_reset(struct usb_ov511 *ov, unsigned char reset_type)
 558 {
 559         int rc;
 560
 561         /* Setting bit 0 not allowed on 518/518Plus */
 562         if (ov->bclass == BCL_OV518)
 563                 reset_type &= 0xfe;
 564
 565         PDEBUG(4, "Reset: type=0x%02X", reset_type);
 566
 567         rc = reg_w(ov, R51x_SYS_RESET, reset_type);
 568         rc = reg_w(ov, R51x_SYS_RESET, 0);
 569
 570         if (rc < 0)
 571                 err("reset: command failed");
 572
 573         return rc;
 574 }
 575
 576 /**********************************************************************
 577  *
 578  * Low-level I2C I/O functions
 579  *
 580  **********************************************************************/
 581
 582 /* NOTE: Do not call this function directly!
 583  * The OV518 I2C I/O procedure is different, hence, this function.
 584  * This is normally only called from i2c_w(). Note that this function
 585  * always succeeds regardless of whether the sensor is present and working.
 586  */
 587 static int
 588 ov518_i2c_write_internal(struct usb_ov511 *ov,
 589                          unsigned char reg,
 590                          unsigned char value)
 591 {
 592         int rc;
 593
 594         PDEBUG(5, "0x%02X:0x%02X", reg, value);
 595
 596         /* Select camera register */
 597         rc = reg_w(ov, R51x_I2C_SADDR_3, reg);
 598         if (rc < 0)
 599                 return rc;
 600
 601         /* Write "value" to I2C data port of OV511 */
 602         rc = reg_w(ov, R51x_I2C_DATA, value);
 603         if (rc < 0)
 604                 return rc;
 605
 606         /* Initiate 3-byte write cycle */
 607         rc = reg_w(ov, R518_I2C_CTL, 0x01);
 608         if (rc < 0)
 609                 return rc;
 610
 611         return 0;
 612 }
 613
 614 /* NOTE: Do not call this function directly! */
 615 static int
 616 ov511_i2c_write_internal(struct usb_ov511 *ov,
 617                          unsigned char reg,
 618                          unsigned char value)
 619 {
 620         int rc, retries;
 621
 622         PDEBUG(5, "0x%02X:0x%02X", reg, value);
 623
 624         /* Three byte write cycle */
 625         for (retries = OV511_I2C_RETRIES; ; ) {
 626                 /* Select camera register */
 627                 rc = reg_w(ov, R51x_I2C_SADDR_3, reg);
 628                 if (rc < 0)
 629                         break;
 630
 631                 /* Write "value" to I2C data port of OV511 */
 632                 rc = reg_w(ov, R51x_I2C_DATA, value);
 633                 if (rc < 0)
 634                         break;
 635
 636                 /* Initiate 3-byte write cycle */
 637                 rc = reg_w(ov, R511_I2C_CTL, 0x01);
 638                 if (rc < 0)
 639                         break;
 640
 641                 /* Retry until idle */
 642                 do
 643                         rc = reg_r(ov, R511_I2C_CTL);
 644                 while (rc > 0 && ((rc&1) == 0));
 645                 if (rc < 0)
 646                         break;
 647
 648                 /* Ack? */
 649                 if ((rc&2) == 0) {
 650                         rc = 0;
 651                         break;
 652                 }
 653 #if 0
 654                 /* I2C abort */
 655                 reg_w(ov, R511_I2C_CTL, 0x10);
 656 #endif
 657                 if (--retries < 0) {
 658                         err("i2c write retries exhausted");
 659                         rc = -1;
 660                         break;
 661                 }
 662         }
 663
 664         return rc;
 665 }
 666
 667 /* NOTE: Do not call this function directly!
 668  * The OV518 I2C I/O procedure is different, hence, this function.
 669  * This is normally only called from i2c_r(). Note that this function
 670  * always succeeds regardless of whether the sensor is present and working.
 671  */
 672 static int
 673 ov518_i2c_read_internal(struct usb_ov511 *ov, unsigned char reg)
 674 {
 675         int rc, value;
 676
 677         /* Select camera register */
 678         rc = reg_w(ov, R51x_I2C_SADDR_2, reg);
 679         if (rc < 0)
 680                 return rc;
 681
 682         /* Initiate 2-byte write cycle */
 683         rc = reg_w(ov, R518_I2C_CTL, 0x03);
 684         if (rc < 0)
 685                 return rc;
 686
 687         /* Initiate 2-byte read cycle */
 688         rc = reg_w(ov, R518_I2C_CTL, 0x05);
 689         if (rc < 0)
 690                 return rc;
 691
 692         value = reg_r(ov, R51x_I2C_DATA);
 693
 694         PDEBUG(5, "0x%02X:0x%02X", reg, value);
 695
 696         return value;
 697 }
 698
 699 /* NOTE: Do not call this function directly!
 700  * returns: negative is error, pos or zero is data */
 701 static int
 702 ov511_i2c_read_internal(struct usb_ov511 *ov, unsigned char reg)
 703 {
 704         int rc, value, retries;
 705
 706         /* Two byte write cycle */
 707         for (retries = OV511_I2C_RETRIES; ; ) {
 708                 /* Select camera register */
 709                 rc = reg_w(ov, R51x_I2C_SADDR_2, reg);
 710                 if (rc < 0)
 711                         return rc;
 712
 713                 /* Initiate 2-byte write cycle */
 714                 rc = reg_w(ov, R511_I2C_CTL, 0x03);
 715                 if (rc < 0)
 716                         return rc;
 717
 718                 /* Retry until idle */
 719                 do
 720                          rc = reg_r(ov, R511_I2C_CTL);
 721                 while (rc > 0 && ((rc&1) == 0));
 722                 if (rc < 0)
 723                         return rc;
 724
 725                 if ((rc&2) == 0) /* Ack? */
 726                         break;
 727
 728                 /* I2C abort */
 729                 reg_w(ov, R511_I2C_CTL, 0x10);
 730
 731                 if (--retries < 0) {
 732                         err("i2c write retries exhausted");
 733                         return -1;
 734                 }
 735         }
 736
 737         /* Two byte read cycle */
 738         for (retries = OV511_I2C_RETRIES; ; ) {
 739                 /* Initiate 2-byte read cycle */
 740                 rc = reg_w(ov, R511_I2C_CTL, 0x05);
 741                 if (rc < 0)
 742                         return rc;
 743
 744                 /* Retry until idle */
 745                 do
 746                         rc = reg_r(ov, R511_I2C_CTL);
 747                 while (rc > 0 && ((rc&1) == 0));
 748                 if (rc < 0)
 749                         return rc;
 750
 751                 if ((rc&2) == 0) /* Ack? */
 752                         break;
 753
 754                 /* I2C abort */
 755                 rc = reg_w(ov, R511_I2C_CTL, 0x10);
 756                 if (rc < 0)
 757                         return rc;
 758
 759                 if (--retries < 0) {
 760                         err("i2c read retries exhausted");
 761                         return -1;
 762                 }
 763         }
 764
 765         value = reg_r(ov, R51x_I2C_DATA);
 766
 767         PDEBUG(5, "0x%02X:0x%02X", reg, value);
 768
 769         /* This is needed to make i2c_w() work */
 770         rc = reg_w(ov, R511_I2C_CTL, 0x05);
 771         if (rc < 0)
 772                 return rc;
 773
 774         return value;
 775 }
 776
 777 /* returns: negative is error, pos or zero is data */
 778 static int
 779 i2c_r(struct usb_ov511 *ov, unsigned char reg)
 780 {
 781         int rc;
 782
 783         down(&ov->i2c_lock);
 784
 785         if (ov->bclass == BCL_OV518)
 786                 rc = ov518_i2c_read_internal(ov, reg);
 787         else
 788                 rc = ov511_i2c_read_internal(ov, reg);
 789
 790         up(&ov->i2c_lock);
 791
 792         return rc;
 793 }
 794
 795 static int
 796 i2c_w(struct usb_ov511 *ov, unsigned char reg, unsigned char value)
 797 {
 798         int rc;
 799
 800         down(&ov->i2c_lock);
 801
 802         if (ov->bclass == BCL_OV518)
 803                 rc = ov518_i2c_write_internal(ov, reg, value);
 804         else
 805                 rc = ov511_i2c_write_internal(ov, reg, value);
 806
 807         up(&ov->i2c_lock);
 808
 809         return rc;
 810 }
 811
 812 /* Do not call this function directly! */
 813 static int
 814 ov51x_i2c_write_mask_internal(struct usb_ov511 *ov,
 815                               unsigned char reg,
 816                               unsigned char value,
 817                               unsigned char mask)
 818 {
 819         int rc;
 820         unsigned char oldval, newval;
 821
 822         if (mask == 0xff) {
 823                 newval = value;
 824         } else {
 825                 if (ov->bclass == BCL_OV518)
 826                         rc = ov518_i2c_read_internal(ov, reg);
 827                 else
 828                         rc = ov511_i2c_read_internal(ov, reg);
 829                 if (rc < 0)
 830                         return rc;
 831
 832                 oldval = (unsigned char) rc;
 833                 oldval &= (~mask);              /* Clear the masked bits */
 834                 value &= mask;                  /* Enforce mask on value */
 835                 newval = oldval | value;        /* Set the desired bits */
 836         }
 837
 838         if (ov->bclass == BCL_OV518)
 839                 return (ov518_i2c_write_internal(ov, reg, newval));
 840         else
 841                 return (ov511_i2c_write_internal(ov, reg, newval));
 842 }
 843
 844 /* Writes bits at positions specified by mask to an I2C reg. Bits that are in
 845  * the same position as 1's in "mask" are cleared and set to "value". Bits
 846  * that are in the same position as 0's in "mask" are preserved, regardless
 847  * of their respective state in "value".
 848  */
 849 static int
 850 i2c_w_mask(struct usb_ov511 *ov,
 851            unsigned char reg,
 852            unsigned char value,
 853            unsigned char mask)
 854 {
 855         int rc;
 856
 857         down(&ov->i2c_lock);
 858         rc = ov51x_i2c_write_mask_internal(ov, reg, value, mask);
 859         up(&ov->i2c_lock);
 860
 861         return rc;
 862 }
 863
 864 /* Set the read and write slave IDs. The "slave" argument is the write slave,
 865  * and the read slave will be set to (slave + 1). ov->i2c_lock should be held
 866  * when calling this. This should not be called from outside the i2c I/O
 867  * functions.
 868  */
 869 static int
 870 i2c_set_slave_internal(struct usb_ov511 *ov, unsigned char slave)
 871 {
 872         int rc;
 873
 874         rc = reg_w(ov, R51x_I2C_W_SID, slave);
 875         if (rc < 0)
 876                 return rc;
 877
 878         rc = reg_w(ov, R51x_I2C_R_SID, slave + 1);
 879         if (rc < 0)
 880                 return rc;
 881
 882         return 0;
 883 }
 884
 885 /* Write to a specific I2C slave ID and register, using the specified mask */
 886 static int
 887 i2c_w_slave(struct usb_ov511 *ov,
 888             unsigned char slave,
 889             unsigned char reg,
 890             unsigned char value,
 891             unsigned char mask)
 892 {
 893         int rc = 0;
 894
 895         down(&ov->i2c_lock);
 896
 897         /* Set new slave IDs */
 898         rc = i2c_set_slave_internal(ov, slave);
 899         if (rc < 0)
 900                 goto out;
 901
 902         rc = ov51x_i2c_write_mask_internal(ov, reg, value, mask);
 903
 904 out:
 905         /* Restore primary IDs */
 906         if (i2c_set_slave_internal(ov, ov->primary_i2c_slave) < 0)
 907                 err("Couldn't restore primary I2C slave");
 908
 909         up(&ov->i2c_lock);
 910         return rc;
 911 }
 912
 913 /* Read from a specific I2C slave ID and register */
 914 static int
 915 i2c_r_slave(struct usb_ov511 *ov,
 916             unsigned char slave,
 917             unsigned char reg)
 918 {
 919         int rc;
 920
 921         down(&ov->i2c_lock);
 922
 923         /* Set new slave IDs */
 924         rc = i2c_set_slave_internal(ov, slave);
 925         if (rc < 0)
 926                 goto out;
 927
 928         if (ov->bclass == BCL_OV518)
 929                 rc = ov518_i2c_read_internal(ov, reg);
 930         else
 931                 rc = ov511_i2c_read_internal(ov, reg);
 932
 933 out:
 934         /* Restore primary IDs */
 935         if (i2c_set_slave_internal(ov, ov->primary_i2c_slave) < 0)
 936                 err("Couldn't restore primary I2C slave");
 937
 938         up(&ov->i2c_lock);
 939         return rc;
 940 }
 941
 942 /* Sets I2C read and write slave IDs. Returns <0 for error */
 943 static int
 944 ov51x_set_slave_ids(struct usb_ov511 *ov, unsigned char sid)
 945 {
 946         int rc;
 947
 948         down(&ov->i2c_lock);
 949
 950         rc = i2c_set_slave_internal(ov, sid);
 951         if (rc < 0)
 952                 goto out;
 953
 954         // FIXME: Is this actually necessary?
 955         rc = ov51x_reset(ov, OV511_RESET_NOREGS);
 956 out:
 957         up(&ov->i2c_lock);
 958         return rc;
 959 }
 960
 961 static int
 962 write_regvals(struct usb_ov511 *ov, struct ov511_regvals * pRegvals)
 963 {
 964         int rc;
 965
 966         while (pRegvals->bus != OV511_DONE_BUS) {
 967                 if (pRegvals->bus == OV511_REG_BUS) {
 968                         if ((rc = reg_w(ov, pRegvals->reg, pRegvals->val)) < 0)
 969                                 return rc;
 970                 } else if (pRegvals->bus == OV511_I2C_BUS) {
 971                         if ((rc = i2c_w(ov, pRegvals->reg, pRegvals->val)) < 0)
 972                                 return rc;
 973                 } else {
 974                         err("Bad regval array");
 975                         return -1;
 976                 }
 977                 pRegvals++;
 978         }
 979         return 0;
 980 }
 981
 982 #ifdef OV511_DEBUG
 983 static void
 984 dump_i2c_range(struct usb_ov511 *ov, int reg1, int regn)
 985 {
 986         int i, rc;
 987
 988         for (i = reg1; i <= regn; i++) {
 989                 rc = i2c_r(ov, i);
 990                 info("Sensor[0x%02X] = 0x%02X", i, rc);
 991         }
 992 }
 993
 994 static void
 995 dump_i2c_regs(struct usb_ov511 *ov)
 996 {
 997         info("I2C REGS");
 998         dump_i2c_range(ov, 0x00, 0x7C);
 999 }
1000
1001 static void
1002 dump_reg_range(struct usb_ov511 *ov, int reg1, int regn)
1003 {
1004         int i, rc;
1005
1006         for (i = reg1; i <= regn; i++) {
1007                 rc = reg_r(ov, i);
1008                 info("OV511[0x%02X] = 0x%02X", i, rc);
1009         }
1010 }
1011
1012 static void
1013 ov511_dump_regs(struct usb_ov511 *ov)
1014 {
1015         info("CAMERA INTERFACE REGS");
1016         dump_reg_range(ov, 0x10, 0x1f);
1017         info("DRAM INTERFACE REGS");
1018         dump_reg_range(ov, 0x20, 0x23);
1019         info("ISO FIFO REGS");
1020         dump_reg_range(ov, 0x30, 0x31);
1021         info("PIO REGS");
1022         dump_reg_range(ov, 0x38, 0x39);
1023         dump_reg_range(ov, 0x3e, 0x3e);
1024         info("I2C REGS");
1025         dump_reg_range(ov, 0x40, 0x49);
1026         info("SYSTEM CONTROL REGS");
1027         dump_reg_range(ov, 0x50, 0x55);
1028         dump_reg_range(ov, 0x5e, 0x5f);
1029         info("OmniCE REGS");
1030         dump_reg_range(ov, 0x70, 0x79);
1031         /* NOTE: Quantization tables are not readable. You will get the value
1032          * in reg. 0x79 for every table register */
1033         dump_reg_range(ov, 0x80, 0x9f);
1034         dump_reg_range(ov, 0xa0, 0xbf);
1035
1036 }
1037
1038 static void
1039 ov518_dump_regs(struct usb_ov511 *ov)
1040 {
1041         info("VIDEO MODE REGS");
1042         dump_reg_range(ov, 0x20, 0x2f);
1043         info("DATA PUMP AND SNAPSHOT REGS");
1044         dump_reg_range(ov, 0x30, 0x3f);
1045         info("I2C REGS");
1046         dump_reg_range(ov, 0x40, 0x4f);
1047         info("SYSTEM CONTROL AND VENDOR REGS");
1048         dump_reg_range(ov, 0x50, 0x5f);
1049         info("60 - 6F");
1050         dump_reg_range(ov, 0x60, 0x6f);
1051         info("70 - 7F");
1052         dump_reg_range(ov, 0x70, 0x7f);
1053         info("Y QUANTIZATION TABLE");
1054         dump_reg_range(ov, 0x80, 0x8f);
1055         info("UV QUANTIZATION TABLE");
1056         dump_reg_range(ov, 0x90, 0x9f);
1057         info("A0 - BF");
1058         dump_reg_range(ov, 0xa0, 0xbf);
1059         info("CBR");
1060         dump_reg_range(ov, 0xc0, 0xcf);
1061 }
1062 #endif
1063
1064 /*****************************************************************************/
1065
1066 /* Temporarily stops OV511 from functioning. Must do this before changing
1067  * registers while the camera is streaming */
1068 static inline int
1069 ov51x_stop(struct usb_ov511 *ov)
1070 {
1071         PDEBUG(4, "stopping");
1072         ov->stopped = 1;
1073         if (ov->bclass == BCL_OV518)
1074                 return (reg_w_mask(ov, R51x_SYS_RESET, 0x3a, 0x3a));
1075         else
1076                 return (reg_w(ov, R51x_SYS_RESET, 0x3d));
1077 }
1078
1079 /* Restarts OV511 after ov511_stop() is called. Has no effect if it is not
1080  * actually stopped (for performance). */
1081 static inline int
1082 ov51x_restart(struct usb_ov511 *ov)
1083 {
1084         if (ov->stopped) {
1085                 PDEBUG(4, "restarting");
1086                 ov->stopped = 0;
1087
1088                 /* Reinitialize the stream */
1089                 if (ov->bclass == BCL_OV518)
1090                         reg_w(ov, 0x2f, 0x80);
1091
1092                 return (reg_w(ov, R51x_SYS_RESET, 0x00));
1093         }
1094
1095         return 0;
1096 }
1097
1098 /* Sleeps until no frames are active. Returns !0 if got signal */
1099 static int
1100 ov51x_wait_frames_inactive(struct usb_ov511 *ov)
1101 {
1102         return wait_event_interruptible(ov->wq, ov->curframe < 0);
1103 }
1104
1105 /* Resets the hardware snapshot button */
1106 static void
1107 ov51x_clear_snapshot(struct usb_ov511 *ov)
1108 {
1109         if (ov->bclass == BCL_OV511) {
1110                 reg_w(ov, R51x_SYS_SNAP, 0x00);
1111                 reg_w(ov, R51x_SYS_SNAP, 0x02);
1112                 reg_w(ov, R51x_SYS_SNAP, 0x00);
1113         } else if (ov->bclass == BCL_OV518) {
1114                 warn("snapshot reset not supported yet on OV518(+)");
1115         } else {
1116                 err("clear snap: invalid bridge type");
1117         }
1118 }
1119
1120 #if 0
1121 /* Checks the status of the snapshot button. Returns 1 if it was pressed since
1122  * it was last cleared, and zero in all other cases (including errors) */
1123 static int
1124 ov51x_check_snapshot(struct usb_ov511 *ov)
1125 {
1126         int ret, status = 0;
1127
1128         if (ov->bclass == BCL_OV511) {
1129                 ret = reg_r(ov, R51x_SYS_SNAP);
1130                 if (ret < 0) {
1131                         err("Error checking snspshot status (%d)", ret);
1132                 } else if (ret & 0x08) {
1133                         status = 1;
1134                 }
1135         } else if (ov->bclass == BCL_OV518) {
1136                 warn("snapshot check not supported yet on OV518(+)");
1137         } else {
1138                 err("check snap: invalid bridge type");
1139         }
1140
1141         return status;
1142 }
1143 #endif
1144
1145 /* This does an initial reset of an OmniVision sensor and ensures that I2C
1146  * is synchronized. Returns <0 for failure.
1147  */
1148 static int
1149 init_ov_sensor(struct usb_ov511 *ov)
1150 {
1151         int i, success;
1152
1153         /* Reset the sensor */
1154         if (i2c_w(ov, 0x12, 0x80) < 0)
1155                 return -EIO;
1156
1157         /* Wait for it to initialize */
1158         msleep(150);
1159
1160         for (i = 0, success = 0; i < i2c_detect_tries && !success; i++) {
1161                 if ((i2c_r(ov, OV7610_REG_ID_HIGH) == 0x7F) &&
1162                     (i2c_r(ov, OV7610_REG_ID_LOW) == 0xA2)) {
1163                         success = 1;
1164                         continue;
1165                 }
1166
1167                 /* Reset the sensor */
1168                 if (i2c_w(ov, 0x12, 0x80) < 0)
1169                         return -EIO;
1170                 /* Wait for it to initialize */
1171                 msleep(150);
1172                 /* Dummy read to sync I2C */
1173                 if (i2c_r(ov, 0x00) < 0)
1174                         return -EIO;
1175         }
1176
1177         if (!success)
1178                 return -EIO;
1179
1180         PDEBUG(1, "I2C synced in %d attempt(s)", i);
1181
1182         return 0;
1183 }
1184
1185 static int
1186 ov511_set_packet_size(struct usb_ov511 *ov, int size)
1187 {
1188         int alt, mult;
1189
1190         if (ov51x_stop(ov) < 0)
1191                 return -EIO;
1192
1193         mult = size >> 5;
1194
1195         if (ov->bridge == BRG_OV511) {
1196                 if (size == 0)
1197                         alt = OV511_ALT_SIZE_0;
1198                 else if (size == 257)
1199                         alt = OV511_ALT_SIZE_257;
1200                 else if (size == 513)
1201                         alt = OV511_ALT_SIZE_513;
1202                 else if (size == 769)
1203                         alt = OV511_ALT_SIZE_769;
1204                 else if (size == 993)
1205                         alt = OV511_ALT_SIZE_993;
1206                 else {
1207                         err("Set packet size: invalid size (%d)", size);
1208                         return -EINVAL;
1209                 }
1210         } else if (ov->bridge == BRG_OV511PLUS) {
1211                 if (size == 0)
1212                         alt = OV511PLUS_ALT_SIZE_0;
1213                 else if (size == 33)
1214                         alt = OV511PLUS_ALT_SIZE_33;
1215                 else if (size == 129)
1216                         alt = OV511PLUS_ALT_SIZE_129;
1217                 else if (size == 257)
1218                         alt = OV511PLUS_ALT_SIZE_257;
1219                 else if (size == 385)
1220                         alt = OV511PLUS_ALT_SIZE_385;
1221                 else if (size == 513)
1222                         alt = OV511PLUS_ALT_SIZE_513;
1223                 else if (size == 769)
1224                         alt = OV511PLUS_ALT_SIZE_769;
1225                 else if (size == 961)
1226                         alt = OV511PLUS_ALT_SIZE_961;
1227                 else {
1228                         err("Set packet size: invalid size (%d)", size);
1229                         return -EINVAL;
1230                 }
1231         } else {
1232                 err("Set packet size: Invalid bridge type");
1233                 return -EINVAL;
1234         }
1235
1236         PDEBUG(3, "%d, mult=%d, alt=%d", size, mult, alt);
1237
1238         if (reg_w(ov, R51x_FIFO_PSIZE, mult) < 0)
1239                 return -EIO;
1240
1241         if (usb_set_interface(ov->dev, ov->iface, alt) < 0) {
1242                 err("Set packet size: set interface error");
1243                 return -EBUSY;
1244         }
1245
1246         if (ov51x_reset(ov, OV511_RESET_NOREGS) < 0)
1247                 return -EIO;
1248
1249         ov->packet_size = size;
1250
1251         if (ov51x_restart(ov) < 0)
1252                 return -EIO;
1253
1254         return 0;
1255 }
1256
1257 /* Note: Unlike the OV511/OV511+, the size argument does NOT include the
1258  * optional packet number byte. The actual size *is* stored in ov->packet_size,
1259  * though. */
1260 static int
1261 ov518_set_packet_size(struct usb_ov511 *ov, int size)
1262 {
1263         int alt;
1264
1265         if (ov51x_stop(ov) < 0)
1266                 return -EIO;
1267
1268         if (ov->bclass == BCL_OV518) {
1269                 if (size == 0)
1270                         alt = OV518_ALT_SIZE_0;
1271                 else if (size == 128)
1272                         alt = OV518_ALT_SIZE_128;
1273                 else if (size == 256)
1274                         alt = OV518_ALT_SIZE_256;
1275                 else if (size == 384)
1276                         alt = OV518_ALT_SIZE_384;
1277                 else if (size == 512)
1278                         alt = OV518_ALT_SIZE_512;
1279                 else if (size == 640)
1280                         alt = OV518_ALT_SIZE_640;
1281                 else if (size == 768)
1282                         alt = OV518_ALT_SIZE_768;
1283                 else if (size == 896)
1284                         alt = OV518_ALT_SIZE_896;
1285                 else {
1286                         err("Set packet size: invalid size (%d)", size);
1287                         return -EINVAL;
1288                 }
1289         } else {
1290                 err("Set packet size: Invalid bridge type");
1291                 return -EINVAL;
1292         }
1293
1294         PDEBUG(3, "%d, alt=%d", size, alt);
1295
1296         ov->packet_size = size;
1297         if (size > 0) {
1298                 /* Program ISO FIFO size reg (packet number isn't included) */
1299                 ov518_reg_w32(ov, 0x30, size, 2);
1300
1301                 if (ov->packet_numbering)
1302                         ++ov->packet_size;
1303         }
1304
1305         if (usb_set_interface(ov->dev, ov->iface, alt) < 0) {
1306                 err("Set packet size: set interface error");
1307                 return -EBUSY;
1308         }
1309
1310         /* Initialize the stream */
1311         if (reg_w(ov, 0x2f, 0x80) < 0)
1312                 return -EIO;
1313
1314         if (ov51x_restart(ov) < 0)
1315                 return -EIO;
1316
1317         if (ov51x_reset(ov, OV511_RESET_NOREGS) < 0)
1318                 return -EIO;
1319
1320         return 0;
1321 }
1322
1323 /* Upload compression params and quantization tables. Returns 0 for success. */
1324 static int
1325 ov511_init_compression(struct usb_ov511 *ov)
1326 {
1327         int rc = 0;
1328
1329         if (!ov->compress_inited) {
1330                 reg_w(ov, 0x70, phy);
1331                 reg_w(ov, 0x71, phuv);
1332                 reg_w(ov, 0x72, pvy);
1333                 reg_w(ov, 0x73, pvuv);
1334                 reg_w(ov, 0x74, qhy);
1335                 reg_w(ov, 0x75, qhuv);
1336                 reg_w(ov, 0x76, qvy);
1337                 reg_w(ov, 0x77, qvuv);
1338
1339                 if (ov511_upload_quan_tables(ov) < 0) {
1340                         err("Error uploading quantization tables");
1341                         rc = -EIO;
1342                         goto out;
1343                 }
1344         }
1345
1346         ov->compress_inited = 1;
1347 out:
1348         return rc;
1349 }
1350
1351 /* Upload compression params and quantization tables. Returns 0 for success. */
1352 static int
1353 ov518_init_compression(struct usb_ov511 *ov)
1354 {
1355         int rc = 0;
1356
1357         if (!ov->compress_inited) {
1358                 if (ov518_upload_quan_tables(ov) < 0) {
1359                         err("Error uploading quantization tables");
1360                         rc = -EIO;
1361                         goto out;
1362                 }
1363         }
1364
1365         ov->compress_inited = 1;
1366 out:
1367         return rc;
1368 }
1369
1370 /* -------------------------------------------------------------------------- */
1371
1372 /* Sets sensor's contrast setting to "val" */
1373 static int
1374 sensor_set_contrast(struct usb_ov511 *ov, unsigned short val)
1375 {
1376         int rc;
1377
1378         PDEBUG(3, "%d", val);
1379
1380         if (ov->stop_during_set)
1381                 if (ov51x_stop(ov) < 0)
1382                         return -EIO;
1383
1384         switch (ov->sensor) {
1385         case SEN_OV7610:
1386         case SEN_OV6620:
1387         {
1388                 rc = i2c_w(ov, OV7610_REG_CNT, val >> 8);
1389                 if (rc < 0)
1390                         goto out;
1391                 break;
1392         }
1393         case SEN_OV6630:
1394         {
1395                 rc = i2c_w_mask(ov, OV7610_REG_CNT, val >> 12, 0x0f);
1396                 if (rc < 0)
1397                         goto out;
1398                 break;
1399         }
1400         case SEN_OV7620:
1401         {
1402                 unsigned char ctab[] = {
1403                         0x01, 0x05, 0x09, 0x11, 0x15, 0x35, 0x37, 0x57,
1404                         0x5b, 0xa5, 0xa7, 0xc7, 0xc9, 0xcf, 0xef, 0xff
1405                 };
1406
1407                 /* Use Y gamma control instead. Bit 0 enables it. */
1408                 rc = i2c_w(ov, 0x64, ctab[val>>12]);
1409                 if (rc < 0)
1410                         goto out;
1411                 break;
1412         }
1413         case SEN_SAA7111A:
1414         {
1415                 rc = i2c_w(ov, 0x0b, val >> 9);
1416                 if (rc < 0)
1417                         goto out;
1418                 break;
1419         }
1420         default:
1421         {
1422                 PDEBUG(3, "Unsupported with this sensor");
1423                 rc = -EPERM;
1424                 goto out;
1425         }
1426         }
1427
1428         rc = 0;         /* Success */
1429         ov->contrast = val;
1430 out:
1431         if (ov51x_restart(ov) < 0)
1432                 return -EIO;
1433
1434         return rc;
1435 }
1436
1437 /* Gets sensor's contrast setting */
1438 static int
1439 sensor_get_contrast(struct usb_ov511 *ov, unsigned short *val)
1440 {
1441         int rc;
1442
1443         switch (ov->sensor) {
1444         case SEN_OV7610:
1445         case SEN_OV6620:
1446                 rc = i2c_r(ov, OV7610_REG_CNT);
1447                 if (rc < 0)
1448                         return rc;
1449                 else
1450                         *val = rc << 8;
1451                 break;
1452         case SEN_OV6630:
1453                 rc = i2c_r(ov, OV7610_REG_CNT);
1454                 if (rc < 0)
1455                         return rc;
1456                 else
1457                         *val = rc << 12;
1458                 break;
1459         case SEN_OV7620:
1460                 /* Use Y gamma reg instead. Bit 0 is the enable bit. */
1461                 rc = i2c_r(ov, 0x64);
1462                 if (rc < 0)
1463                         return rc;
1464                 else
1465                         *val = (rc & 0xfe) << 8;
1466                 break;
1467         case SEN_SAA7111A:
1468                 *val = ov->contrast;
1469                 break;
1470         default:
1471                 PDEBUG(3, "Unsupported with this sensor");
1472                 return -EPERM;
1473         }
1474
1475         PDEBUG(3, "%d", *val);
1476         ov->contrast = *val;
1477
1478         return 0;
1479 }
1480
1481 /* -------------------------------------------------------------------------- */
1482
1483 /* Sets sensor's brightness setting to "val" */
1484 static int
1485 sensor_set_brightness(struct usb_ov511 *ov, unsigned short val)
1486 {
1487         int rc;
1488
1489         PDEBUG(4, "%d", val);
1490
1491         if (ov->stop_during_set)
1492                 if (ov51x_stop(ov) < 0)
1493                         return -EIO;
1494
1495         switch (ov->sensor) {
1496         case SEN_OV7610:
1497         case SEN_OV76BE:
1498         case SEN_OV6620:
1499         case SEN_OV6630:
1500                 rc = i2c_w(ov, OV7610_REG_BRT, val >> 8);
1501                 if (rc < 0)
1502                         goto out;
1503                 break;
1504         case SEN_OV7620:
1505                 /* 7620 doesn't like manual changes when in auto mode */
1506                 if (!ov->auto_brt) {
1507                         rc = i2c_w(ov, OV7610_REG_BRT, val >> 8);
1508                         if (rc < 0)
1509                                 goto out;
1510                 }
1511                 break;
1512         case SEN_SAA7111A:
1513                 rc = i2c_w(ov, 0x0a, val >> 8);
1514                 if (rc < 0)
1515                         goto out;
1516                 break;
1517         default:
1518                 PDEBUG(3, "Unsupported with this sensor");
1519                 rc = -EPERM;
1520                 goto out;
1521         }
1522
1523         rc = 0;         /* Success */
1524         ov->brightness = val;
1525 out:
1526         if (ov51x_restart(ov) < 0)
1527                 return -EIO;
1528
1529         return rc;
1530 }
1531
1532 /* Gets sensor's brightness setting */
1533 static int
1534 sensor_get_brightness(struct usb_ov511 *ov, unsigned short *val)
1535 {
1536         int rc;
1537
1538         switch (ov->sensor) {
1539         case SEN_OV7610:
1540         case SEN_OV76BE:
1541         case SEN_OV7620:
1542         case SEN_OV6620:
1543         case SEN_OV6630:
1544                 rc = i2c_r(ov, OV7610_REG_BRT);
1545                 if (rc < 0)
1546                         return rc;
1547                 else
1548                         *val = rc << 8;
1549                 break;
1550         case SEN_SAA7111A:
1551                 *val = ov->brightness;
1552                 break;
1553         default:
1554                 PDEBUG(3, "Unsupported with this sensor");
1555                 return -EPERM;
1556         }
1557
1558         PDEBUG(3, "%d", *val);
1559         ov->brightness = *val;
1560
1561         return 0;
1562 }
1563
1564 /* -------------------------------------------------------------------------- */
1565
1566 /* Sets sensor's saturation (color intensity) setting to "val" */
1567 static int
1568 sensor_set_saturation(struct usb_ov511 *ov, unsigned short val)
1569 {
1570         int rc;
1571
1572         PDEBUG(3, "%d", val);
1573
1574         if (ov->stop_during_set)
1575                 if (ov51x_stop(ov) < 0)
1576                         return -EIO;
1577
1578         switch (ov->sensor) {
1579         case SEN_OV7610:
1580         case SEN_OV76BE:
1581         case SEN_OV6620:
1582         case SEN_OV6630:
1583                 rc = i2c_w(ov, OV7610_REG_SAT, val >> 8);
1584                 if (rc < 0)
1585                         goto out;
1586                 break;
1587         case SEN_OV7620:
1588 //              /* Use UV gamma control instead. Bits 0 & 7 are reserved. */
1589 //              rc = ov_i2c_write(ov->dev, 0x62, (val >> 9) & 0x7e);
1590 //              if (rc < 0)
1591 //                      goto out;
1592                 rc = i2c_w(ov, OV7610_REG_SAT, val >> 8);
1593                 if (rc < 0)
1594                         goto out;
1595                 break;
1596         case SEN_SAA7111A:
1597                 rc = i2c_w(ov, 0x0c, val >> 9);
1598                 if (rc < 0)
1599                         goto out;
1600                 break;
1601         default:
1602                 PDEBUG(3, "Unsupported with this sensor");
1603                 rc = -EPERM;
1604                 goto out;
1605         }
1606
1607         rc = 0;         /* Success */
1608         ov->colour = val;
1609 out:
1610         if (ov51x_restart(ov) < 0)
1611                 return -EIO;
1612
1613         return rc;
1614 }
1615
1616 /* Gets sensor's saturation (color intensity) setting */
1617 static int
1618 sensor_get_saturation(struct usb_ov511 *ov, unsigned short *val)
1619 {
1620         int rc;
1621
1622         switch (ov->sensor) {
1623         case SEN_OV7610:
1624         case SEN_OV76BE:
1625         case SEN_OV6620:
1626         case SEN_OV6630:
1627                 rc = i2c_r(ov, OV7610_REG_SAT);
1628                 if (rc < 0)
1629                         return rc;
1630                 else
1631                         *val = rc << 8;
1632                 break;
1633         case SEN_OV7620:
1634 //              /* Use UV gamma reg instead. Bits 0 & 7 are reserved. */
1635 //              rc = i2c_r(ov, 0x62);
1636 //              if (rc < 0)
1637 //                      return rc;
1638 //              else
1639 //                      *val = (rc & 0x7e) << 9;
1640                 rc = i2c_r(ov, OV7610_REG_SAT);
1641                 if (rc < 0)
1642                         return rc;
1643                 else
1644                         *val = rc << 8;
1645                 break;
1646         case SEN_SAA7111A:
1647                 *val = ov->colour;
1648                 break;
1649         default:
1650                 PDEBUG(3, "Unsupported with this sensor");
1651                 return -EPERM;
1652         }
1653
1654         PDEBUG(3, "%d", *val);
1655         ov->colour = *val;
1656
1657         return 0;
1658 }
1659
1660 /* -------------------------------------------------------------------------- */
1661
1662 /* Sets sensor's hue (red/blue balance) setting to "val" */
1663 static int
1664 sensor_set_hue(struct usb_ov511 *ov, unsigned short val)
1665 {
1666         int rc;
1667
1668         PDEBUG(3, "%d", val);
1669
1670         if (ov->stop_during_set)
1671                 if (ov51x_stop(ov) < 0)
1672                         return -EIO;
1673
1674         switch (ov->sensor) {
1675         case SEN_OV7610:
1676         case SEN_OV6620:
1677         case SEN_OV6630:
1678                 rc = i2c_w(ov, OV7610_REG_RED, 0xFF - (val >> 8));
1679                 if (rc < 0)
1680                         goto out;
1681
1682                 rc = i2c_w(ov, OV7610_REG_BLUE, val >> 8);
1683                 if (rc < 0)
1684                         goto out;
1685                 break;
1686         case SEN_OV7620:
1687 // Hue control is causing problems. I will enable it once it's fixed.
1688 #if 0
1689                 rc = i2c_w(ov, 0x7a, (unsigned char)(val >> 8) + 0xb);
1690                 if (rc < 0)
1691                         goto out;
1692
1693                 rc = i2c_w(ov, 0x79, (unsigned char)(val >> 8) + 0xb);
1694                 if (rc < 0)
1695                         goto out;
1696 #endif
1697                 break;
1698         case SEN_SAA7111A:
1699                 rc = i2c_w(ov, 0x0d, (val + 32768) >> 8);
1700                 if (rc < 0)
1701                         goto out;
1702                 break;
1703         default:
1704                 PDEBUG(3, "Unsupported with this sensor");
1705                 rc = -EPERM;
1706                 goto out;
1707         }
1708
1709         rc = 0;         /* Success */
1710         ov->hue = val;
1711 out:
1712         if (ov51x_restart(ov) < 0)
1713                 return -EIO;
1714
1715         return rc;
1716 }
1717
1718 /* Gets sensor's hue (red/blue balance) setting */
1719 static int
1720 sensor_get_hue(struct usb_ov511 *ov, unsigned short *val)
1721 {
1722         int rc;
1723
1724         switch (ov->sensor) {
1725         case SEN_OV7610:
1726         case SEN_OV6620:
1727         case SEN_OV6630:
1728                 rc = i2c_r(ov, OV7610_REG_BLUE);
1729                 if (rc < 0)
1730                         return rc;
1731                 else
1732                         *val = rc << 8;
1733                 break;
1734         case SEN_OV7620:
1735                 rc = i2c_r(ov, 0x7a);
1736                 if (rc < 0)
1737                         return rc;
1738                 else
1739                         *val = rc << 8;
1740                 break;
1741         case SEN_SAA7111A:
1742                 *val = ov->hue;
1743                 break;
1744         default:
1745                 PDEBUG(3, "Unsupported with this sensor");
1746                 return -EPERM;
1747         }
1748
1749         PDEBUG(3, "%d", *val);
1750         ov->hue = *val;
1751
1752         return 0;
1753 }
1754
1755 /* -------------------------------------------------------------------------- */
1756
1757 static int
1758 sensor_set_picture(struct usb_ov511 *ov, struct video_picture *p)
1759 {
1760         int rc;
1761
1762         PDEBUG(4, "sensor_set_picture");
1763
1764         ov->whiteness = p->whiteness;
1765
1766         /* Don't return error if a setting is unsupported, or rest of settings
1767          * will not be performed */
1768
1769         rc = sensor_set_contrast(ov, p->contrast);
1770         if (FATAL_ERROR(rc))
1771                 return rc;
1772
1773         rc = sensor_set_brightness(ov, p->brightness);
1774         if (FATAL_ERROR(rc))
1775                 return rc;
1776
1777         rc = sensor_set_saturation(ov, p->colour);
1778         if (FATAL_ERROR(rc))
1779                 return rc;
1780
1781         rc = sensor_set_hue(ov, p->hue);
1782         if (FATAL_ERROR(rc))
1783                 return rc;
1784
1785         return 0;
1786 }
1787
1788 static int
1789 sensor_get_picture(struct usb_ov511 *ov, struct video_picture *p)
1790 {
1791         int rc;
1792
1793         PDEBUG(4, "sensor_get_picture");
1794
1795         /* Don't return error if a setting is unsupported, or rest of settings
1796          * will not be performed */
1797
1798         rc = sensor_get_contrast(ov, &(p->contrast));
1799         if (FATAL_ERROR(rc))
1800                 return rc;
1801
1802         rc = sensor_get_brightness(ov, &(p->brightness));
1803         if (FATAL_ERROR(rc))
1804                 return rc;
1805
1806         rc = sensor_get_saturation(ov, &(p->colour));
1807         if (FATAL_ERROR(rc))
1808                 return rc;
1809
1810         rc = sensor_get_hue(ov, &(p->hue));
1811         if (FATAL_ERROR(rc))
1812                 return rc;
1813
1814         p->whiteness = 105 << 8;
1815
1816         return 0;
1817 }
1818
1819 #if 0
1820 // FIXME: Exposure range is only 0x00-0x7f in interlace mode
1821 /* Sets current exposure for sensor. This only has an effect if auto-exposure
1822  * is off */
1823 static inline int
1824 sensor_set_exposure(struct usb_ov511 *ov, unsigned char val)
1825 {
1826         int rc;
1827
1828         PDEBUG(3, "%d", val);
1829
1830         if (ov->stop_during_set)
1831                 if (ov51x_stop(ov) < 0)
1832                         return -EIO;
1833
1834         switch (ov->sensor) {
1835         case SEN_OV6620:
1836         case SEN_OV6630:
1837         case SEN_OV7610:
1838         case SEN_OV7620:
1839         case SEN_OV76BE:
1840         case SEN_OV8600:
1841                 rc = i2c_w(ov, 0x10, val);
1842                 if (rc < 0)
1843                         goto out;
1844
1845                 break;
1846         case SEN_KS0127:
1847         case SEN_KS0127B:
1848         case SEN_SAA7111A:
1849                 PDEBUG(3, "Unsupported with this sensor");
1850                 return -EPERM;
1851         default:
1852                 err("Sensor not supported for set_exposure");
1853                 return -EINVAL;
1854         }
1855
1856         rc = 0;         /* Success */
1857         ov->exposure = val;
1858 out:
1859         if (ov51x_restart(ov) < 0)
1860                 return -EIO;
1861
1862         return rc;
1863 }
1864 #endif
1865
1866 /* Gets current exposure level from sensor, regardless of whether it is under
1867  * manual control. */
1868 static int
1869 sensor_get_exposure(struct usb_ov511 *ov, unsigned char *val)
1870 {
1871         int rc;
1872
1873         switch (ov->sensor) {
1874         case SEN_OV7610:
1875         case SEN_OV6620:
1876         case SEN_OV6630:
1877         case SEN_OV7620:
1878         case SEN_OV76BE:
1879         case SEN_OV8600:
1880                 rc = i2c_r(ov, 0x10);
1881                 if (rc < 0)
1882                         return rc;
1883                 else
1884                         *val = rc;
1885                 break;
1886         case SEN_KS0127:
1887         case SEN_KS0127B:
1888         case SEN_SAA7111A:
1889                 val = NULL;
1890                 PDEBUG(3, "Unsupported with this sensor");
1891                 return -EPERM;
1892         default:
1893                 err("Sensor not supported for get_exposure");
1894                 return -EINVAL;
1895         }
1896
1897         PDEBUG(3, "%d", *val);
1898         ov->exposure = *val;
1899
1900         return 0;
1901 }
1902
1903 /* Turns on or off the LED. Only has an effect with OV511+/OV518(+) */
1904 static void
1905 ov51x_led_control(struct usb_ov511 *ov, int enable)
1906 {
1907         PDEBUG(4, " (%s)", enable ? "turn on" : "turn off");
1908
1909         if (ov->bridge == BRG_OV511PLUS)
1910                 reg_w(ov, R511_SYS_LED_CTL, enable ? 1 : 0);
1911         else if (ov->bclass == BCL_OV518)
1912                 reg_w_mask(ov, R518_GPIO_OUT, enable ? 0x02 : 0x00, 0x02);
1913
1914         return;
1915 }
1916
1917 /* Matches the sensor's internal frame rate to the lighting frequency.
1918  * Valid frequencies are:
1919  *      50 - 50Hz, for European and Asian lighting
1920  *      60 - 60Hz, for American lighting
1921  *
1922  * Tested with: OV7610, OV7620, OV76BE, OV6620
1923  * Unsupported: KS0127, KS0127B, SAA7111A
1924  * Returns: 0 for success
1925  */
1926 static int
1927 sensor_set_light_freq(struct usb_ov511 *ov, int freq)
1928 {
1929         int sixty;
1930
1931         PDEBUG(4, "%d Hz", freq);
1932
1933         if (freq == 60)
1934                 sixty = 1;
1935         else if (freq == 50)
1936                 sixty = 0;
1937         else {
1938                 err("Invalid light freq (%d Hz)", freq);
1939                 return -EINVAL;
1940         }
1941
1942         switch (ov->sensor) {
1943         case SEN_OV7610:
1944                 i2c_w_mask(ov, 0x2a, sixty?0x00:0x80, 0x80);
1945                 i2c_w(ov, 0x2b, sixty?0x00:0xac);
1946                 i2c_w_mask(ov, 0x13, 0x10, 0x10);
1947                 i2c_w_mask(ov, 0x13, 0x00, 0x10);
1948                 break;
1949         case SEN_OV7620:
1950         case SEN_OV76BE:
1951         case SEN_OV8600:
1952                 i2c_w_mask(ov, 0x2a, sixty?0x00:0x80, 0x80);
1953                 i2c_w(ov, 0x2b, sixty?0x00:0xac);
1954                 i2c_w_mask(ov, 0x76, 0x01, 0x01);
1955                 break;
1956         case SEN_OV6620:
1957         case SEN_OV6630:
1958                 i2c_w(ov, 0x2b, sixty?0xa8:0x28);
1959                 i2c_w(ov, 0x2a, sixty?0x84:0xa4);
1960                 break;
1961         case SEN_KS0127:
1962         case SEN_KS0127B:
1963         case SEN_SAA7111A:
1964                 PDEBUG(5, "Unsupported with this sensor");
1965                 return -EPERM;
1966         default:
1967                 err("Sensor not supported for set_light_freq");
1968                 return -EINVAL;
1969         }
1970
1971         ov->lightfreq = freq;
1972
1973         return 0;
1974 }
1975
1976 /* If enable is true, turn on the sensor's banding filter, otherwise turn it
1977  * off. This filter tries to reduce the pattern of horizontal light/dark bands
1978  * caused by some (usually fluorescent) lighting. The light frequency must be
1979  * set either before or after enabling it with ov51x_set_light_freq().
1980  *
1981  * Tested with: OV7610, OV7620, OV76BE, OV6620.
1982  * Unsupported: KS0127, KS0127B, SAA7111A
1983  * Returns: 0 for success
1984  */
1985 static int
1986 sensor_set_banding_filter(struct usb_ov511 *ov, int enable)
1987 {
1988         int rc;
1989
1990         PDEBUG(4, " (%s)", enable ? "turn on" : "turn off");
1991
1992         if (ov->sensor == SEN_KS0127 || ov->sensor == SEN_KS0127B
1993                 || ov->sensor == SEN_SAA7111A) {
1994                 PDEBUG(5, "Unsupported with this sensor");
1995                 return -EPERM;
1996         }
1997
1998         rc = i2c_w_mask(ov, 0x2d, enable?0x04:0x00, 0x04);
1999         if (rc < 0)
2000                 return rc;
2001
2002         ov->bandfilt = enable;
2003
2004         return 0;
2005 }
2006
2007 /* If enable is true, turn on the sensor's auto brightness control, otherwise
2008  * turn it off.
2009  *
2010  * Unsupported: KS0127, KS0127B, SAA7111A
2011  * Returns: 0 for success
2012  */
2013 static int
2014 sensor_set_auto_brightness(struct usb_ov511 *ov, int enable)
2015 {
2016         int rc;
2017
2018         PDEBUG(4, " (%s)", enable ? "turn on" : "turn off");
2019
2020         if (ov->sensor == SEN_KS0127 || ov->sensor == SEN_KS0127B
2021                 || ov->sensor == SEN_SAA7111A) {
2022                 PDEBUG(5, "Unsupported with this sensor");
2023                 return -EPERM;
2024         }
2025
2026         rc = i2c_w_mask(ov, 0x2d, enable?0x10:0x00, 0x10);
2027         if (rc < 0)
2028                 return rc;
2029
2030         ov->auto_brt = enable;
2031
2032         return 0;
2033 }
2034
2035 /* If enable is true, turn on the sensor's auto exposure control, otherwise
2036  * turn it off.
2037  *
2038  * Unsupported: KS0127, KS0127B, SAA7111A
2039  * Returns: 0 for success
2040  */
2041 static int
2042 sensor_set_auto_exposure(struct usb_ov511 *ov, int enable)
2043 {
2044         PDEBUG(4, " (%s)", enable ? "turn on" : "turn off");
2045
2046         switch (ov->sensor) {
2047         case SEN_OV7610:
2048                 i2c_w_mask(ov, 0x29, enable?0x00:0x80, 0x80);
2049                 break;
2050         case SEN_OV6620:
2051         case SEN_OV7620:
2052         case SEN_OV76BE:
2053         case SEN_OV8600:
2054                 i2c_w_mask(ov, 0x13, enable?0x01:0x00, 0x01);
2055                 break;
2056         case SEN_OV6630:
2057                 i2c_w_mask(ov, 0x28, enable?0x00:0x10, 0x10);
2058                 break;
2059         case SEN_KS0127:
2060         case SEN_KS0127B:
2061         case SEN_SAA7111A:
2062                 PDEBUG(5, "Unsupported with this sensor");
2063                 return -EPERM;
2064         default:
2065                 err("Sensor not supported for set_auto_exposure");
2066                 return -EINVAL;
2067         }
2068
2069         ov->auto_exp = enable;
2070
2071         return 0;
2072 }
2073
2074 /* Modifies the sensor's exposure algorithm to allow proper exposure of objects
2075  * that are illuminated from behind.
2076  *
2077  * Tested with: OV6620, OV7620
2078  * Unsupported: OV7610, OV76BE, KS0127, KS0127B, SAA7111A
2079  * Returns: 0 for success
2080  */
2081 static int
2082 sensor_set_backlight(struct usb_ov511 *ov, int enable)
2083 {
2084         PDEBUG(4, " (%s)", enable ? "turn on" : "turn off");
2085
2086         switch (ov->sensor) {
2087         case SEN_OV7620:
2088         case SEN_OV8600:
2089                 i2c_w_mask(ov, 0x68, enable?0xe0:0xc0, 0xe0);
2090                 i2c_w_mask(ov, 0x29, enable?0x08:0x00, 0x08);
2091                 i2c_w_mask(ov, 0x28, enable?0x02:0x00, 0x02);
2092                 break;
2093         case SEN_OV6620:
2094                 i2c_w_mask(ov, 0x4e, enable?0xe0:0xc0, 0xe0);
2095                 i2c_w_mask(ov, 0x29, enable?0x08:0x00, 0x08);
2096                 i2c_w_mask(ov, 0x0e, enable?0x80:0x00, 0x80);
2097                 break;
2098         case SEN_OV6630:
2099                 i2c_w_mask(ov, 0x4e, enable?0x80:0x60, 0xe0);
2100                 i2c_w_mask(ov, 0x29, enable?0x08:0x00, 0x08);
2101                 i2c_w_mask(ov, 0x28, enable?0x02:0x00, 0x02);
2102                 break;
2103         case SEN_OV7610:
2104         case SEN_OV76BE:
2105         case SEN_KS0127:
2106         case SEN_KS0127B:
2107         case SEN_SAA7111A:
2108                 PDEBUG(5, "Unsupported with this sensor");
2109                 return -EPERM;
2110         default:
2111                 err("Sensor not supported for set_backlight");
2112                 return -EINVAL;
2113         }
2114
2115         ov->backlight = enable;
2116
2117         return 0;
2118 }
2119
2120 static int
2121 sensor_set_mirror(struct usb_ov511 *ov, int enable)
2122 {
2123         PDEBUG(4, " (%s)", enable ? "turn on" : "turn off");
2124
2125         switch (ov->sensor) {
2126         case SEN_OV6620:
2127         case SEN_OV6630:
2128         case SEN_OV7610:
2129         case SEN_OV7620:
2130         case SEN_OV76BE:
2131         case SEN_OV8600:
2132                 i2c_w_mask(ov, 0x12, enable?0x40:0x00, 0x40);
2133                 break;
2134         case SEN_KS0127:
2135         case SEN_KS0127B:
2136         case SEN_SAA7111A:
2137                 PDEBUG(5, "Unsupported with this sensor");
2138                 return -EPERM;
2139         default:
2140                 err("Sensor not supported for set_mirror");
2141                 return -EINVAL;
2142         }
2143
2144         ov->mirror = enable;
2145
2146         return 0;
2147 }
2148
2149 /* Returns number of bits per pixel (regardless of where they are located;
2150  * planar or not), or zero for unsupported format.
2151  */
2152 static inline int
2153 get_depth(int palette)
2154 {
2155         switch (palette) {
2156         case VIDEO_PALETTE_GREY:    return 8;
2157         case VIDEO_PALETTE_YUV420:  return 12;
2158         case VIDEO_PALETTE_YUV420P: return 12; /* Planar */
2159         default:                    return 0;  /* Invalid format */
2160         }
2161 }
2162
2163 /* Bytes per frame. Used by read(). Return of 0 indicates error */
2164 static inline long int
2165 get_frame_length(struct ov511_frame *frame)
2166 {
2167         if (!frame)
2168                 return 0;
2169         else
2170                 return ((frame->width * frame->height
2171                          * get_depth(frame->format)) >> 3);
2172 }
2173
2174 static int
2175 mode_init_ov_sensor_regs(struct usb_ov511 *ov, int width, int height,
2176                          int mode, int sub_flag, int qvga)
2177 {
2178         int clock;
2179
2180         /******** Mode (VGA/QVGA) and sensor specific regs ********/
2181
2182         switch (ov->sensor) {
2183         case SEN_OV7610:
2184                 i2c_w(ov, 0x14, qvga?0x24:0x04);
2185 // FIXME: Does this improve the image quality or frame rate?
2186 #if 0
2187                 i2c_w_mask(ov, 0x28, qvga?0x00:0x20, 0x20);
2188                 i2c_w(ov, 0x24, 0x10);
2189                 i2c_w(ov, 0x25, qvga?0x40:0x8a);
2190                 i2c_w(ov, 0x2f, qvga?0x30:0xb0);
2191                 i2c_w(ov, 0x35, qvga?0x1c:0x9c);
2192 #endif
2193                 break;
2194         case SEN_OV7620:
2195 //              i2c_w(ov, 0x2b, 0x00);
2196                 i2c_w(ov, 0x14, qvga?0xa4:0x84);
2197                 i2c_w_mask(ov, 0x28, qvga?0x00:0x20, 0x20);
2198                 i2c_w(ov, 0x24, qvga?0x20:0x3a);
2199                 i2c_w(ov, 0x25, qvga?0x30:0x60);
2200                 i2c_w_mask(ov, 0x2d, qvga?0x40:0x00, 0x40);
2201                 i2c_w_mask(ov, 0x67, qvga?0xf0:0x90, 0xf0);
2202                 i2c_w_mask(ov, 0x74, qvga?0x20:0x00, 0x20);
2203                 break;
2204         case SEN_OV76BE:
2205 //              i2c_w(ov, 0x2b, 0x00);
2206                 i2c_w(ov, 0x14, qvga?0xa4:0x84);
2207 // FIXME: Enable this once 7620AE uses 7620 initial settings
2208 #if 0
2209                 i2c_w_mask(ov, 0x28, qvga?0x00:0x20, 0x20);
2210                 i2c_w(ov, 0x24, qvga?0x20:0x3a);
2211                 i2c_w(ov, 0x25, qvga?0x30:0x60);
2212                 i2c_w_mask(ov, 0x2d, qvga?0x40:0x00, 0x40);
2213                 i2c_w_mask(ov, 0x67, qvga?0xb0:0x90, 0xf0);
2214                 i2c_w_mask(ov, 0x74, qvga?0x20:0x00, 0x20);
2215 #endif
2216                 break;
2217         case SEN_OV6620:
2218                 i2c_w(ov, 0x14, qvga?0x24:0x04);
2219                 break;
2220         case SEN_OV6630:
2221                 i2c_w(ov, 0x14, qvga?0xa0:0x80);
2222                 break;
2223         default:
2224                 err("Invalid sensor");
2225                 return -EINVAL;
2226         }
2227
2228         /******** Palette-specific regs ********/
2229
2230         if (mode == VIDEO_PALETTE_GREY) {
2231                 if (ov->sensor == SEN_OV7610 || ov->sensor == SEN_OV76BE) {
2232                         /* these aren't valid on the OV6620/OV7620/6630? */
2233                         i2c_w_mask(ov, 0x0e, 0x40, 0x40);
2234                 }
2235
2236                 if (ov->sensor == SEN_OV6630 && ov->bridge == BRG_OV518
2237                     && ov518_color) {
2238                         i2c_w_mask(ov, 0x12, 0x00, 0x10);
2239                         i2c_w_mask(ov, 0x13, 0x00, 0x20);
2240                 } else {
2241                         i2c_w_mask(ov, 0x13, 0x20, 0x20);
2242                 }
2243         } else {
2244                 if (ov->sensor == SEN_OV7610 || ov->sensor == SEN_OV76BE) {
2245                         /* not valid on the OV6620/OV7620/6630? */
2246                         i2c_w_mask(ov, 0x0e, 0x00, 0x40);
2247                 }
2248
2249                 /* The OV518 needs special treatment. Although both the OV518
2250                  * and the OV6630 support a 16-bit video bus, only the 8 bit Y
2251                  * bus is actually used. The UV bus is tied to ground.
2252                  * Therefore, the OV6630 needs to be in 8-bit multiplexed
2253                  * output mode */
2254
2255                 if (ov->sensor == SEN_OV6630 && ov->bridge == BRG_OV518
2256                     && ov518_color) {
2257                         i2c_w_mask(ov, 0x12, 0x10, 0x10);
2258                         i2c_w_mask(ov, 0x13, 0x20, 0x20);
2259                 } else {
2260                         i2c_w_mask(ov, 0x13, 0x00, 0x20);
2261                 }
2262         }
2263
2264         /******** Clock programming ********/
2265
2266         /* The OV6620 needs special handling. This prevents the
2267          * severe banding that normally occurs */
2268         if (ov->sensor == SEN_OV6620 || ov->sensor == SEN_OV6630)
2269         {
2270                 /* Clock down */
2271
2272                 i2c_w(ov, 0x2a, 0x04);
2273
2274                 if (ov->compress) {
2275 //                      clock = 0;    /* This ensures the highest frame rate */
2276                         clock = 3;
2277                 } else if (clockdiv == -1) {   /* If user didn't override it */
2278                         clock = 3;    /* Gives better exposure time */
2279                 } else {
2280                         clock = clockdiv;
2281                 }
2282
2283                 PDEBUG(4, "Setting clock divisor to %d", clock);
2284
2285                 i2c_w(ov, 0x11, clock);
2286
2287                 i2c_w(ov, 0x2a, 0x84);
2288                 /* This next setting is critical. It seems to improve
2289                  * the gain or the contrast. The "reserved" bits seem
2290                  * to have some effect in this case. */
2291                 i2c_w(ov, 0x2d, 0x85);
2292         }
2293         else
2294         {
2295                 if (ov->compress) {
2296                         clock = 1;    /* This ensures the highest frame rate */
2297                 } else if (clockdiv == -1) {   /* If user didn't override it */
2298                         /* Calculate and set the clock divisor */
2299                         clock = ((sub_flag ? ov->subw * ov->subh
2300                                   : width * height)
2301                                  * (mode == VIDEO_PALETTE_GREY ? 2 : 3) / 2)
2302                                  / 66000;
2303                 } else {
2304                         clock = clockdiv;
2305                 }
2306
2307                 PDEBUG(4, "Setting clock divisor to %d", clock);
2308
2309                 i2c_w(ov, 0x11, clock);
2310         }
2311
2312         /******** Special Features ********/
2313
2314         if (framedrop >= 0)
2315                 i2c_w(ov, 0x16, framedrop);
2316
2317         /* Test Pattern */
2318         i2c_w_mask(ov, 0x12, (testpat?0x02:0x00), 0x02);
2319
2320         /* Enable auto white balance */
2321         i2c_w_mask(ov, 0x12, 0x04, 0x04);
2322
2323         // This will go away as soon as ov51x_mode_init_sensor_regs()
2324         // is fully tested.
2325         /* 7620/6620/6630? don't have register 0x35, so play it safe */
2326         if (ov->sensor == SEN_OV7610 || ov->sensor == SEN_OV76BE) {
2327                 if (width == 640 && height == 480)
2328                         i2c_w(ov, 0x35, 0x9e);
2329                 else
2330                         i2c_w(ov, 0x35, 0x1e);
2331         }
2332
2333         return 0;
2334 }
2335
2336 static int
2337 set_ov_sensor_window(struct usb_ov511 *ov, int width, int height, int mode,
2338                      int sub_flag)
2339 {
2340         int ret;
2341         int hwsbase, hwebase, vwsbase, vwebase, hwsize, vwsize;
2342         int hoffset, voffset, hwscale = 0, vwscale = 0;
2343
2344         /* The different sensor ICs handle setting up of window differently.
2345          * IF YOU SET IT WRONG, YOU WILL GET ALL ZERO ISOC DATA FROM OV51x!!! */
2346         switch (ov->sensor) {
2347         case SEN_OV7610:
2348         case SEN_OV76BE:
2349                 hwsbase = 0x38;
2350                 hwebase = 0x3a;
2351                 vwsbase = vwebase = 0x05;
2352                 break;
2353         case SEN_OV6620:
2354         case SEN_OV6630:
2355                 hwsbase = 0x38;
2356                 hwebase = 0x3a;
2357                 vwsbase = 0x05;
2358                 vwebase = 0x06;
2359                 break;
2360         case SEN_OV7620:
2361                 hwsbase = 0x2f;         /* From 7620.SET (spec is wrong) */
2362                 hwebase = 0x2f;
2363                 vwsbase = vwebase = 0x05;
2364                 break;
2365         default:
2366                 err("Invalid sensor");
2367                 return -EINVAL;
2368         }
2369
2370         if (ov->sensor == SEN_OV6620 || ov->sensor == SEN_OV6630) {
2371                 /* Note: OV518(+) does downsample on its own) */
2372                 if ((width > 176 && height > 144)
2373                     || ov->bclass == BCL_OV518) {  /* CIF */
2374                         ret = mode_init_ov_sensor_regs(ov, width, height,
2375                                 mode, sub_flag, 0);
2376                         if (ret < 0)
2377                                 return ret;
2378                         hwscale = 1;
2379                         vwscale = 1;  /* The datasheet says 0; it's wrong */
2380                         hwsize = 352;
2381                         vwsize = 288;
2382                 } else if (width > 176 || height > 144) {
2383                         err("Illegal dimensions");
2384                         return -EINVAL;
2385                 } else {                            /* QCIF */
2386                         ret = mode_init_ov_sensor_regs(ov, width, height,
2387                                 mode, sub_flag, 1);
2388                         if (ret < 0)
2389                                 return ret;
2390                         hwsize = 176;
2391                         vwsize = 144;
2392                 }
2393         } else {
2394                 if (width > 320 && height > 240) {  /* VGA */
2395                         ret = mode_init_ov_sensor_regs(ov, width, height,
2396                                 mode, sub_flag, 0);
2397                         if (ret < 0)
2398                                 return ret;
2399                         hwscale = 2;
2400                         vwscale = 1;
2401                         hwsize = 640;
2402                         vwsize = 480;
2403                 } else if (width > 320 || height > 240) {
2404                         err("Illegal dimensions");
2405                         return -EINVAL;
2406                 } else {                            /* QVGA */
2407                         ret = mode_init_ov_sensor_regs(ov, width, height,
2408                                 mode, sub_flag, 1);
2409                         if (ret < 0)
2410                                 return ret;
2411                         hwscale = 1;
2412                         hwsize = 320;
2413                         vwsize = 240;
2414                 }
2415         }
2416
2417         /* Center the window */
2418         hoffset = ((hwsize - width) / 2) >> hwscale;
2419         voffset = ((vwsize - height) / 2) >> vwscale;
2420
2421         /* FIXME! - This needs to be changed to support 160x120 and 6620!!! */
2422         if (sub_flag) {
2423                 i2c_w(ov, 0x17, hwsbase+(ov->subx>>hwscale));
2424                 i2c_w(ov, 0x18, hwebase+((ov->subx+ov->subw)>>hwscale));
2425                 i2c_w(ov, 0x19, vwsbase+(ov->suby>>vwscale));
2426                 i2c_w(ov, 0x1a, vwebase+((ov->suby+ov->subh)>>vwscale));
2427         } else {
2428                 i2c_w(ov, 0x17, hwsbase + hoffset);
2429                 i2c_w(ov, 0x18, hwebase + hoffset + (hwsize>>hwscale));
2430                 i2c_w(ov, 0x19, vwsbase + voffset);
2431                 i2c_w(ov, 0x1a, vwebase + voffset + (vwsize>>vwscale));
2432         }
2433
2434 #ifdef OV511_DEBUG
2435         if (dump_sensor)
2436                 dump_i2c_regs(ov);
2437 #endif
2438
2439         return 0;
2440 }
2441
2442 /* Set up the OV511/OV511+ with the given image parameters.
2443  *
2444  * Do not put any sensor-specific code in here (including I2C I/O functions)
2445  */
2446 static int
2447 ov511_mode_init_regs(struct usb_ov511 *ov,
2448                      int width, int height, int mode, int sub_flag)
2449 {
2450         int hsegs, vsegs;
2451
2452         if (sub_flag) {
2453                 width = ov->subw;
2454                 height = ov->subh;
2455         }
2456
2457         PDEBUG(3, "width:%d, height:%d, mode:%d, sub:%d",
2458                width, height, mode, sub_flag);
2459
2460         // FIXME: This should be moved to a 7111a-specific function once
2461         // subcapture is dealt with properly
2462         if (ov->sensor == SEN_SAA7111A) {
2463                 if (width == 320 && height == 240) {
2464                         /* No need to do anything special */
2465                 } else if (width == 640 && height == 480) {
2466                         /* Set the OV511 up as 320x480, but keep the
2467                          * V4L resolution as 640x480 */
2468                         width = 320;
2469                 } else {
2470                         err("SAA7111A only allows 320x240 or 640x480");
2471                         return -EINVAL;
2472                 }
2473         }
2474
2475         /* Make sure width and height are a multiple of 8 */
2476         if (width % 8 || height % 8) {
2477                 err("Invalid size (%d, %d) (mode = %d)", width, height, mode);
2478                 return -EINVAL;
2479         }
2480
2481         if (width < ov->minwidth || height < ov->minheight) {
2482                 err("Requested dimensions are too small");
2483                 return -EINVAL;
2484         }
2485
2486         if (ov51x_stop(ov) < 0)
2487                 return -EIO;
2488
2489         if (mode == VIDEO_PALETTE_GREY) {
2490                 reg_w(ov, R511_CAM_UV_EN, 0x00);
2491                 reg_w(ov, R511_SNAP_UV_EN, 0x00);
2492                 reg_w(ov, R511_SNAP_OPTS, 0x01);
2493         } else {
2494                 reg_w(ov, R511_CAM_UV_EN, 0x01);
2495                 reg_w(ov, R511_SNAP_UV_EN, 0x01);
2496                 reg_w(ov, R511_SNAP_OPTS, 0x03);
2497         }
2498
2499         /* Here I'm assuming that snapshot size == image size.
2500          * I hope that's always true. --claudio
2501          */
2502         hsegs = (width >> 3) - 1;
2503         vsegs = (height >> 3) - 1;
2504
2505         reg_w(ov, R511_CAM_PXCNT, hsegs);
2506         reg_w(ov, R511_CAM_LNCNT, vsegs);
2507         reg_w(ov, R511_CAM_PXDIV, 0x00);
2508         reg_w(ov, R511_CAM_LNDIV, 0x00);
2509
2510         /* YUV420, low pass filter on */
2511         reg_w(ov, R511_CAM_OPTS, 0x03);
2512
2513         /* Snapshot additions */
2514         reg_w(ov, R511_SNAP_PXCNT, hsegs);
2515         reg_w(ov, R511_SNAP_LNCNT, vsegs);
2516         reg_w(ov, R511_SNAP_PXDIV, 0x00);
2517         reg_w(ov, R511_SNAP_LNDIV, 0x00);
2518
2519         if (ov->compress) {
2520                 /* Enable Y and UV quantization and compression */
2521                 reg_w(ov, R511_COMP_EN, 0x07);
2522                 reg_w(ov, R511_COMP_LUT_EN, 0x03);
2523                 ov51x_reset(ov, OV511_RESET_OMNICE);
2524         }
2525
2526         if (ov51x_restart(ov) < 0)
2527                 return -EIO;
2528
2529         return 0;
2530 }
2531
2532 /* Sets up the OV518/OV518+ with the given image parameters
2533  *
2534  * OV518 needs a completely different approach, until we can figure out what
2535  * the individual registers do. Also, only 15 FPS is supported now.
2536  *
2537  * Do not put any sensor-specific code in here (including I2C I/O functions)
2538  */
2539 static int
2540 ov518_mode_init_regs(struct usb_ov511 *ov,
2541                      int width, int height, int mode, int sub_flag)
2542 {
2543         int hsegs, vsegs, hi_res;
2544
2545         if (sub_flag) {
2546                 width = ov->subw;
2547                 height = ov->subh;
2548         }
2549
2550         PDEBUG(3, "width:%d, height:%d, mode:%d, sub:%d",
2551                width, height, mode, sub_flag);
2552
2553         if (width % 16 || height % 8) {
2554                 err("Invalid size (%d, %d)", width, height);
2555                 return -EINVAL;
2556         }
2557
2558         if (width < ov->minwidth || height < ov->minheight) {
2559                 err("Requested dimensions are too small");
2560                 return -EINVAL;
2561         }
2562
2563         if (width >= 320 && height >= 240) {
2564                 hi_res = 1;
2565         } else if (width >= 320 || height >= 240) {
2566                 err("Invalid width/height combination (%d, %d)", width, height);
2567                 return -EINVAL;
2568         } else {
2569                 hi_res = 0;
2570         }
2571
2572         if (ov51x_stop(ov) < 0)
2573                 return -EIO;
2574
2575         /******** Set the mode ********/
2576
2577         reg_w(ov, 0x2b, 0);
2578         reg_w(ov, 0x2c, 0);
2579         reg_w(ov, 0x2d, 0);
2580         reg_w(ov, 0x2e, 0);
2581         reg_w(ov, 0x3b, 0);
2582         reg_w(ov, 0x3c, 0);
2583         reg_w(ov, 0x3d, 0);
2584         reg_w(ov, 0x3e, 0);
2585
2586         if (ov->bridge == BRG_OV518 && ov518_color) {
2587                 /* OV518 needs U and V swapped */
2588                 i2c_w_mask(ov, 0x15, 0x00, 0x01);
2589
2590                 if (mode == VIDEO_PALETTE_GREY) {
2591                         /* Set 16-bit input format (UV data are ignored) */
2592                         reg_w_mask(ov, 0x20, 0x00, 0x08);
2593
2594                         /* Set 8-bit (4:0:0) output format */
2595                         reg_w_mask(ov, 0x28, 0x00, 0xf0);
2596                         reg_w_mask(ov, 0x38, 0x00, 0xf0);
2597                 } else {
2598                         /* Set 8-bit (YVYU) input format */
2599                         reg_w_mask(ov, 0x20, 0x08, 0x08);
2600
2601                         /* Set 12-bit (4:2:0) output format */
2602                         reg_w_mask(ov, 0x28, 0x80, 0xf0);
2603                         reg_w_mask(ov, 0x38, 0x80, 0xf0);
2604                 }
2605         } else {
2606                 reg_w(ov, 0x28, (mode == VIDEO_PALETTE_GREY) ? 0x00:0x80);
2607                 reg_w(ov, 0x38, (mode == VIDEO_PALETTE_GREY) ? 0x00:0x80);
2608         }
2609
2610         hsegs = width / 16;
2611         vsegs = height / 4;
2612
2613         reg_w(ov, 0x29, hsegs);
2614         reg_w(ov, 0x2a, vsegs);
2615
2616         reg_w(ov, 0x39, hsegs);
2617         reg_w(ov, 0x3a, vsegs);
2618
2619         /* Windows driver does this here; who knows why */
2620         reg_w(ov, 0x2f, 0x80);
2621
2622         /******** Set the framerate (to 15 FPS) ********/
2623
2624         /* Mode independent, but framerate dependent, regs */
2625         reg_w(ov, 0x51, 0x02);  /* Clock divider; lower==faster */
2626         reg_w(ov, 0x22, 0x18);
2627         reg_w(ov, 0x23, 0xff);
2628
2629         if (ov->bridge == BRG_OV518PLUS)
2630                 reg_w(ov, 0x21, 0x19);
2631         else
2632                 reg_w(ov, 0x71, 0x19);  /* Compression-related? */
2633
2634         // FIXME: Sensor-specific
2635         /* Bit 5 is what matters here. Of course, it is "reserved" */
2636         i2c_w(ov, 0x54, 0x23);
2637
2638         reg_w(ov, 0x2f, 0x80);
2639
2640         if (ov->bridge == BRG_OV518PLUS) {
2641                 reg_w(ov, 0x24, 0x94);
2642                 reg_w(ov, 0x25, 0x90);
2643                 ov518_reg_w32(ov, 0xc4,    400, 2);     /* 190h   */
2644                 ov518_reg_w32(ov, 0xc6,    540, 2);     /* 21ch   */
2645                 ov518_reg_w32(ov, 0xc7,    540, 2);     /* 21ch   */
2646                 ov518_reg_w32(ov, 0xc8,    108, 2);     /* 6ch    */
2647                 ov518_reg_w32(ov, 0xca, 131098, 3);     /* 2001ah */
2648                 ov518_reg_w32(ov, 0xcb,    532, 2);     /* 214h   */
2649                 ov518_reg_w32(ov, 0xcc,   2400, 2);     /* 960h   */
2650                 ov518_reg_w32(ov, 0xcd,     32, 2);     /* 20h    */
2651                 ov518_reg_w32(ov, 0xce,    608, 2);     /* 260h   */
2652         } else {
2653                 reg_w(ov, 0x24, 0x9f);
2654                 reg_w(ov, 0x25, 0x90);
2655                 ov518_reg_w32(ov, 0xc4,    400, 2);     /* 190h   */
2656                 ov518_reg_w32(ov, 0xc6,    500, 2);     /* 1f4h   */
2657                 ov518_reg_w32(ov, 0xc7,    500, 2);     /* 1f4h   */
2658                 ov518_reg_w32(ov, 0xc8,    142, 2);     /* 8eh    */
2659                 ov518_reg_w32(ov, 0xca, 131098, 3);     /* 2001ah */
2660                 ov518_reg_w32(ov, 0xcb,    532, 2);     /* 214h   */
2661                 ov518_reg_w32(ov, 0xcc,   2000, 2);     /* 7d0h   */
2662                 ov518_reg_w32(ov, 0xcd,     32, 2);     /* 20h    */
2663                 ov518_reg_w32(ov, 0xce,    608, 2);     /* 260h   */
2664         }
2665
2666         reg_w(ov, 0x2f, 0x80);
2667
2668         if (ov51x_restart(ov) < 0)
2669                 return -EIO;
2670
2671         /* Reset it just for good measure */
2672         if (ov51x_reset(ov, OV511_RESET_NOREGS) < 0)
2673                 return -EIO;
2674
2675         return 0;
2676 }
2677
2678 /* This is a wrapper around the OV511, OV518, and sensor specific functions */
2679 static int
2680 mode_init_regs(struct usb_ov511 *ov,
2681                int width, int height, int mode, int sub_flag)
2682 {
2683         int rc = 0;
2684
2685         if (!ov || !ov->dev)
2686                 return -EFAULT;
2687
2688         if (ov->bclass == BCL_OV518) {
2689                 rc = ov518_mode_init_regs(ov, width, height, mode, sub_flag);
2690         } else {
2691                 rc = ov511_mode_init_regs(ov, width, height, mode, sub_flag);
2692         }
2693
2694         if (FATAL_ERROR(rc))
2695                 return rc;
2696
2697         switch (ov->sensor) {
2698         case SEN_OV7610:
2699         case SEN_OV7620:
2700         case SEN_OV76BE:
2701         case SEN_OV8600:
2702         case SEN_OV6620:
2703         case SEN_OV6630:
2704                 rc = set_ov_sensor_window(ov, width, height, mode, sub_flag);
2705                 break;
2706         case SEN_KS0127:
2707         case SEN_KS0127B:
2708                 err("KS0127-series decoders not supported yet");
2709                 rc = -EINVAL;
2710                 break;
2711         case SEN_SAA7111A:
2712 //              rc = mode_init_saa_sensor_regs(ov, width, height, mode,
2713 //                                             sub_flag);
2714
2715                 PDEBUG(1, "SAA status = 0x%02X", i2c_r(ov, 0x1f));
2716                 break;
2717         default:
2718                 err("Unknown sensor");
2719                 rc = -EINVAL;
2720         }
2721
2722         if (FATAL_ERROR(rc))
2723                 return rc;
2724
2725         /* Sensor-independent settings */
2726         rc = sensor_set_auto_brightness(ov, ov->auto_brt);
2727         if (FATAL_ERROR(rc))
2728                 return rc;
2729
2730         rc = sensor_set_auto_exposure(ov, ov->auto_exp);
2731         if (FATAL_ERROR(rc))
2732                 return rc;
2733
2734         rc = sensor_set_banding_filter(ov, bandingfilter);
2735         if (FATAL_ERROR(rc))
2736                 return rc;
2737
2738         if (ov->lightfreq) {
2739                 rc = sensor_set_light_freq(ov, lightfreq);
2740                 if (FATAL_ERROR(rc))
2741                         return rc;
2742         }
2743
2744         rc = sensor_set_backlight(ov, ov->backlight);
2745         if (FATAL_ERROR(rc))
2746                 return rc;
2747
2748         rc = sensor_set_mirror(ov, ov->mirror);
2749         if (FATAL_ERROR(rc))
2750                 return rc;
2751
2752         return 0;
2753 }
2754
2755 /* This sets the default image parameters. This is useful for apps that use
2756  * read() and do not set these.
2757  */
2758 static int
2759 ov51x_set_default_params(struct usb_ov511 *ov)
2760 {
2761         int i;
2762
2763         /* Set default sizes in case IOCTL (VIDIOCMCAPTURE) is not used
2764          * (using read() instead). */
2765         for (i = 0; i < OV511_NUMFRAMES; i++) {
2766                 ov->frame[i].width = ov->maxwidth;
2767                 ov->frame[i].height = ov->maxheight;
2768                 ov->frame[i].bytes_read = 0;
2769                 if (force_palette)
2770                         ov->frame[i].format = force_palette;
2771                 else
2772                         ov->frame[i].format = VIDEO_PALETTE_YUV420;
2773
2774                 ov->frame[i].depth = get_depth(ov->frame[i].format);
2775         }
2776
2777         PDEBUG(3, "%dx%d, %s", ov->maxwidth, ov->maxheight,
2778                symbolic(v4l1_plist, ov->frame[0].format));
2779
2780         /* Initialize to max width/height, YUV420 or RGB24 (if supported) */
2781         if (mode_init_regs(ov, ov->maxwidth, ov->maxheight,
2782                            ov->frame[0].format, 0) < 0)
2783                 return -EINVAL;
2784
2785         return 0;
2786 }
2787
2788 /**********************************************************************
2789  *
2790  * Video decoder stuff
2791  *
2792  **********************************************************************/
2793
2794 /* Set analog input port of decoder */
2795 static int
2796 decoder_set_input(struct usb_ov511 *ov, int input)
2797 {
2798         PDEBUG(4, "port %d", input);
2799
2800         switch (ov->sensor) {
2801         case SEN_SAA7111A:
2802         {
2803                 /* Select mode */
2804                 i2c_w_mask(ov, 0x02, input, 0x07);
2805                 /* Bypass chrominance trap for modes 4..7 */
2806                 i2c_w_mask(ov, 0x09, (input > 3) ? 0x80:0x00, 0x80);
2807                 break;
2808         }
2809         default:
2810                 return -EINVAL;
2811         }
2812
2813         return 0;
2814 }
2815
2816 /* Get ASCII name of video input */
2817 static int
2818 decoder_get_input_name(struct usb_ov511 *ov, int input, char *name)
2819 {
2820         switch (ov->sensor) {
2821         case SEN_SAA7111A:
2822         {
2823                 if (input < 0 || input > 7)
2824                         return -EINVAL;
2825                 else if (input < 4)
2826                         sprintf(name, "CVBS-%d", input);
2827                 else // if (input < 8)
2828                         sprintf(name, "S-Video-%d", input - 4);
2829                 break;
2830         }
2831         default:
2832                 sprintf(name, "%s", "Camera");
2833         }
2834
2835         return 0;
2836 }
2837
2838 /* Set norm (NTSC, PAL, SECAM, AUTO) */
2839 static int
2840 decoder_set_norm(struct usb_ov511 *ov, int norm)
2841 {
2842         PDEBUG(4, "%d", norm);
2843
2844         switch (ov->sensor) {
2845         case SEN_SAA7111A:
2846         {
2847                 int reg_8, reg_e;
2848
2849                 if (norm == VIDEO_MODE_NTSC) {
2850                         reg_8 = 0x40;   /* 60 Hz */
2851                         reg_e = 0x00;   /* NTSC M / PAL BGHI */
2852                 } else if (norm == VIDEO_MODE_PAL) {
2853                         reg_8 = 0x00;   /* 50 Hz */
2854                         reg_e = 0x00;   /* NTSC M / PAL BGHI */
2855                 } else if (norm == VIDEO_MODE_AUTO) {
2856                         reg_8 = 0x80;   /* Auto field detect */
2857                         reg_e = 0x00;   /* NTSC M / PAL BGHI */
2858                 } else if (norm == VIDEO_MODE_SECAM) {
2859                         reg_8 = 0x00;   /* 50 Hz */
2860                         reg_e = 0x50;   /* SECAM / PAL 4.43 */
2861                 } else {
2862                         return -EINVAL;
2863                 }
2864
2865                 i2c_w_mask(ov, 0x08, reg_8, 0xc0);
2866                 i2c_w_mask(ov, 0x0e, reg_e, 0x70);
2867                 break;
2868         }
2869         default:
2870                 return -EINVAL;
2871         }
2872
2873         return 0;
2874 }
2875
2876 /**********************************************************************
2877  *
2878  * Raw data parsing
2879  *
2880  **********************************************************************/
2881
2882 /* Copies a 64-byte segment at pIn to an 8x8 block at pOut. The width of the
2883  * image at pOut is specified by w.
2884  */
2885 static inline void
2886 make_8x8(unsigned char *pIn, unsigned char *pOut, int w)
2887 {
2888         unsigned char *pOut1 = pOut;
2889         int x, y;
2890
2891         for (y = 0; y < 8; y++) {
2892                 pOut1 = pOut;
2893                 for (x = 0; x < 8; x++) {
2894                         *pOut1++ = *pIn++;
2895                 }
2896                 pOut += w;
2897         }
2898 }
2899
2900 /*
2901  * For RAW BW (YUV 4:0:0) images, data show up in 256 byte segments.
2902  * The segments represent 4 squares of 8x8 pixels as follows:
2903  *
2904  *      0  1 ...  7    64  65 ...  71   ...  192 193 ... 199
2905  *      8  9 ... 15    72  73 ...  79        200 201 ... 207
2906  *           ...              ...                    ...
2907  *     56 57 ... 63   120 121 ... 127        248 249 ... 255
2908  *
2909  */
2910 static void
2911 yuv400raw_to_yuv400p(struct ov511_frame *frame,
2912                      unsigned char *pIn0, unsigned char *pOut0)
2913 {
2914         int x, y;
2915         unsigned char *pIn, *pOut, *pOutLine;
2916
2917         /* Copy Y */
2918         pIn = pIn0;
2919         pOutLine = pOut0;
2920         for (y = 0; y < frame->rawheight - 1; y += 8) {
2921                 pOut = pOutLine;
2922                 for (x = 0; x < frame->rawwidth - 1; x += 8) {
2923                         make_8x8(pIn, pOut, frame->rawwidth);
2924                         pIn += 64;
2925                         pOut += 8;
2926                 }
2927                 pOutLine += 8 * frame->rawwidth;
2928         }
2929 }
2930
2931 /*
2932  * For YUV 4:2:0 images, the data show up in 384 byte segments.
2933  * The first 64 bytes of each segment are U, the next 64 are V.  The U and
2934  * V are arranged as follows:
2935  *
2936  *      0  1 ...  7
2937  *      8  9 ... 15
2938  *           ...
2939  *     56 57 ... 63
2940  *
2941  * U and V are shipped at half resolution (1 U,V sample -> one 2x2 block).
2942  *
2943  * The next 256 bytes are full resolution Y data and represent 4 squares
2944  * of 8x8 pixels as follows:
2945  *
2946  *      0  1 ...  7    64  65 ...  71   ...  192 193 ... 199
2947  *      8  9 ... 15    72  73 ...  79        200 201 ... 207
2948  *           ...              ...                    ...
2949  *     56 57 ... 63   120 121 ... 127   ...  248 249 ... 255
2950  *
2951  * Note that the U and V data in one segment represent a 16 x 16 pixel
2952  * area, but the Y data represent a 32 x 8 pixel area. If the width is not an
2953  * even multiple of 32, the extra 8x8 blocks within a 32x8 block belong to the
2954  * next horizontal stripe.
2955  *
2956  * If dumppix module param is set, _parse_data just dumps the incoming segments,
2957  * verbatim, in order, into the frame. When used with vidcat -f ppm -s 640x480
2958  * this puts the data on the standard output and can be analyzed with the
2959  * parseppm.c utility I wrote.  That's a much faster way for figuring out how
2960  * these data are scrambled.
2961  */
2962
2963 /* Converts from raw, uncompressed segments at pIn0 to a YUV420P frame at pOut0.
2964  *
2965  * FIXME: Currently only handles width and height that are multiples of 16
2966  */
2967 static void
2968 yuv420raw_to_yuv420p(struct ov511_frame *frame,
2969                      unsigned char *pIn0, unsigned char *pOut0)
2970 {
2971         int k, x, y;
2972         unsigned char *pIn, *pOut, *pOutLine;
2973         const unsigned int a = frame->rawwidth * frame->rawheight;
2974         const unsigned int w = frame->rawwidth / 2;
2975
2976         /* Copy U and V */
2977         pIn = pIn0;
2978         pOutLine = pOut0 + a;
2979         for (y = 0; y < frame->rawheight - 1; y += 16) {
2980                 pOut = pOutLine;
2981                 for (x = 0; x < frame->rawwidth - 1; x += 16) {
2982                         make_8x8(pIn, pOut, w);
2983                         make_8x8(pIn + 64, pOut + a/4, w);
2984                         pIn += 384;
2985                         pOut += 8;
2986                 }
2987                 pOutLine += 8 * w;
2988         }
2989
2990         /* Copy Y */
2991         pIn = pIn0 + 128;
2992         pOutLine = pOut0;
2993         k = 0;
2994         for (y = 0; y < frame->rawheight - 1; y += 8) {
2995                 pOut = pOutLine;
2996                 for (x = 0; x < frame->rawwidth - 1; x += 8) {
2997                         make_8x8(pIn, pOut, frame->rawwidth);
2998                         pIn += 64;
2999                         pOut += 8;
3000                         if ((++k) > 3) {
3001                                 k = 0;
3002                                 pIn += 128;
3003                         }
3004                 }
3005                 pOutLine += 8 * frame->rawwidth;
3006         }
3007 }
3008
3009 /**********************************************************************
3010  *
3011  * Decompression
3012  *
3013  **********************************************************************/
3014
3015 /* Chooses a decompression module, locks it, and sets ov->decomp_ops
3016  * accordingly. Returns -ENXIO if decompressor is not available, otherwise
3017  * returns 0 if no other error.
3018  */
3019 static int
3020 request_decompressor(struct usb_ov511 *ov)
3021 {
3022         if (!ov)
3023                 return -ENODEV;
3024
3025         if (ov->decomp_ops) {
3026                 err("ERROR: Decompressor already requested!");
3027                 return -EINVAL;
3028         }
3029
3030         lock_kernel();
3031
3032         /* Try to get MMX, and fall back on no-MMX if necessary */
3033         if (ov->bclass == BCL_OV511) {
3034                 if (ov511_mmx_decomp_ops) {
3035                         PDEBUG(3, "Using OV511 MMX decompressor");
3036                         ov->decomp_ops = ov511_mmx_decomp_ops;
3037                 } else if (ov511_decomp_ops) {
3038                         PDEBUG(3, "Using OV511 decompressor");
3039                         ov->decomp_ops = ov511_decomp_ops;
3040                 } else {
3041                         err("No decompressor available");
3042                 }
3043         } else if (ov->bclass == BCL_OV518) {
3044                 if (ov518_mmx_decomp_ops) {
3045                         PDEBUG(3, "Using OV518 MMX decompressor");
3046                         ov->decomp_ops = ov518_mmx_decomp_ops;
3047                 } else if (ov518_decomp_ops) {
3048                         PDEBUG(3, "Using OV518 decompressor");
3049                         ov->decomp_ops = ov518_decomp_ops;
3050                 } else {
3051                         err("No decompressor available");
3052                 }
3053         } else {
3054                 err("Unknown bridge");
3055         }
3056
3057         if (!ov->decomp_ops)
3058                 goto nosys;
3059
3060         if (!ov->decomp_ops->owner) {
3061                 ov->decomp_ops = NULL;
3062                 goto nosys;
3063         }
3064
3065         if (!try_module_get(ov->decomp_ops->owner))
3066                 goto nosys;
3067
3068         unlock_kernel();
3069         return 0;
3070
3071  nosys:
3072         unlock_kernel();
3073         return -ENOSYS;
3074 }
3075
3076 /* Unlocks decompression module and nulls ov->decomp_ops. Safe to call even
3077  * if ov->decomp_ops is NULL.
3078  */
3079 static void
3080 release_decompressor(struct usb_ov511 *ov)
3081 {
3082         int released = 0;       /* Did we actually do anything? */
3083
3084         if (!ov)
3085                 return;
3086
3087         lock_kernel();
3088
3089         if (ov->decomp_ops) {
3090                 module_put(ov->decomp_ops->owner);
3091                 released = 1;
3092         }
3093
3094         ov->decomp_ops = NULL;
3095
3096         unlock_kernel();
3097
3098         if (released)
3099                 PDEBUG(3, "Decompressor released");
3100 }
3101
3102 static void
3103 decompress(struct usb_ov511 *ov, struct ov511_frame *frame,
3104            unsigned char *pIn0, unsigned char *pOut0)
3105 {
3106         if (!ov->decomp_ops)
3107                 if (request_decompressor(ov))
3108                         return;
3109
3110         PDEBUG(4, "Decompressing %d bytes", frame->bytes_recvd);
3111
3112         if (frame->format == VIDEO_PALETTE_GREY
3113             && ov->decomp_ops->decomp_400) {
3114                 int ret = ov->decomp_ops->decomp_400(
3115                         pIn0,
3116                         pOut0,
3117                         frame->compbuf,
3118                         frame->rawwidth,
3119                         frame->rawheight,
3120                         frame->bytes_recvd);
3121                 PDEBUG(4, "DEBUG: decomp_400 returned %d", ret);
3122         } else if (frame->format != VIDEO_PALETTE_GREY
3123                    && ov->decomp_ops->decomp_420) {
3124                 int ret = ov->decomp_ops->decomp_420(
3125                         pIn0,
3126                         pOut0,
3127                         frame->compbuf,
3128                         frame->rawwidth,
3129                         frame->rawheight,
3130                         frame->bytes_recvd);
3131                 PDEBUG(4, "DEBUG: decomp_420 returned %d", ret);
3132         } else {
3133                 err("Decompressor does not support this format");
3134         }
3135 }
3136
3137 /**********************************************************************
3138  *
3139  * Format conversion
3140  *
3141  **********************************************************************/
3142
3143 /* Fuses even and odd fields together, and doubles width.
3144  * INPUT: an odd field followed by an even field at pIn0, in YUV planar format
3145  * OUTPUT: a normal YUV planar image, with correct aspect ratio
3146  */
3147 static void
3148 deinterlace(struct ov511_frame *frame, int rawformat,
3149             unsigned char *pIn0, unsigned char *pOut0)
3150 {
3151         const int fieldheight = frame->rawheight / 2;
3152         const int fieldpix = fieldheight * frame->rawwidth;
3153         const int w = frame->width;
3154         int x, y;
3155         unsigned char *pInEven, *pInOdd, *pOut;
3156
3157         PDEBUG(5, "fieldheight=%d", fieldheight);
3158
3159         if (frame->rawheight != frame->height) {
3160                 err("invalid height");
3161                 return;
3162         }
3163
3164         if ((frame->rawwidth * 2) != frame->width) {
3165                 err("invalid width");
3166                 return;
3167         }
3168
3169         /* Y */
3170         pInOdd = pIn0;
3171         pInEven = pInOdd + fieldpix;
3172         pOut = pOut0;
3173         for (y = 0; y < fieldheight; y++) {
3174                 for (x = 0; x < frame->rawwidth; x++) {
3175                         *pOut = *pInEven;
3176                         *(pOut+1) = *pInEven++;
3177                         *(pOut+w) = *pInOdd;
3178                         *(pOut+w+1) = *pInOdd++;
3179                         pOut += 2;
3180                 }
3181                 pOut += w;
3182         }
3183
3184         if (rawformat == RAWFMT_YUV420) {
3185         /* U */
3186                 pInOdd = pIn0 + fieldpix * 2;
3187                 pInEven = pInOdd + fieldpix / 4;
3188                 for (y = 0; y < fieldheight / 2; y++) {
3189                         for (x = 0; x < frame->rawwidth / 2; x++) {
3190                                 *pOut = *pInEven;
3191                                 *(pOut+1) = *pInEven++;
3192                                 *(pOut+w/2) = *pInOdd;
3193                                 *(pOut+w/2+1) = *pInOdd++;
3194                                 pOut += 2;
3195                         }
3196                         pOut += w/2;
3197                 }
3198         /* V */
3199                 pInOdd = pIn0 + fieldpix * 2 + fieldpix / 2;
3200                 pInEven = pInOdd + fieldpix / 4;
3201                 for (y = 0; y < fieldheight / 2; y++) {
3202                         for (x = 0; x < frame->rawwidth / 2; x++) {
3203                                 *pOut = *pInEven;
3204                                 *(pOut+1) = *pInEven++;
3205                                 *(pOut+w/2) = *pInOdd;
3206                                 *(pOut+w/2+1) = *pInOdd++;
3207                                 pOut += 2;
3208                         }
3209                         pOut += w/2;
3210                 }
3211         }
3212 }
3213
3214 static void
3215 ov51x_postprocess_grey(struct usb_ov511 *ov, struct ov511_frame *frame)
3216 {
3217                 /* Deinterlace frame, if necessary */
3218                 if (ov->sensor == SEN_SAA7111A && frame->rawheight >= 480) {
3219                         if (frame->compressed)
3220                                 decompress(ov, frame, frame->rawdata,
3221                                                  frame->tempdata);
3222                         else
3223                                 yuv400raw_to_yuv400p(frame, frame->rawdata,
3224                                                      frame->tempdata);
3225
3226                         deinterlace(frame, RAWFMT_YUV400, frame->tempdata,
3227                                     frame->data);
3228                 } else {
3229                         if (frame->compressed)
3230                                 decompress(ov, frame, frame->rawdata,
3231                                                  frame->data);
3232                         else
3233                                 yuv400raw_to_yuv400p(frame, frame->rawdata,
3234                                                      frame->data);
3235                 }
3236 }
3237
3238 /* Process raw YUV420 data into standard YUV420P */
3239 static void
3240 ov51x_postprocess_yuv420(struct usb_ov511 *ov, struct ov511_frame *frame)
3241 {
3242         /* Deinterlace frame, if necessary */
3243         if (ov->sensor == SEN_SAA7111A && frame->rawheight >= 480) {
3244                 if (frame->compressed)
3245                         decompress(ov, frame, frame->rawdata, frame->tempdata);
3246                 else
3247                         yuv420raw_to_yuv420p(frame, frame->rawdata,
3248                                              frame->tempdata);
3249
3250                 deinterlace(frame, RAWFMT_YUV420, frame->tempdata,
3251                             frame->data);
3252         } else {
3253                 if (frame->compressed)
3254                         decompress(ov, frame, frame->rawdata, frame->data);
3255                 else
3256                         yuv420raw_to_yuv420p(frame, frame->rawdata,
3257                                              frame->data);
3258         }
3259 }
3260
3261 /* Post-processes the specified frame. This consists of:
3262  *      1. Decompress frame, if necessary
3263  *      2. Deinterlace frame and scale to proper size, if necessary
3264  *      3. Convert from YUV planar to destination format, if necessary
3265  *      4. Fix the RGB offset, if necessary
3266  */
3267 static void
3268 ov51x_postprocess(struct usb_ov511 *ov, struct ov511_frame *frame)
3269 {
3270         if (dumppix) {
3271                 memset(frame->data, 0,
3272                         MAX_DATA_SIZE(ov->maxwidth, ov->maxheight));
3273                 PDEBUG(4, "Dumping %d bytes", frame->bytes_recvd);
3274                 memcpy(frame->data, frame->rawdata, frame->bytes_recvd);
3275         } else {
3276                 switch (frame->format) {
3277                 case VIDEO_PALETTE_GREY:
3278                         ov51x_postprocess_grey(ov, frame);
3279                         break;
3280                 case VIDEO_PALETTE_YUV420:
3281                 case VIDEO_PALETTE_YUV420P:
3282                         ov51x_postprocess_yuv420(ov, frame);
3283                         break;
3284                 default:
3285                         err("Cannot convert data to %s",
3286                             symbolic(v4l1_plist, frame->format));
3287                 }
3288         }
3289 }
3290
3291 /**********************************************************************
3292  *
3293  * OV51x data transfer, IRQ handler
3294  *
3295  **********************************************************************/
3296
3297 static inline void
3298 ov511_move_data(struct usb_ov511 *ov, unsigned char *in, int n)
3299 {
3300         int num, offset;
3301         int pnum = in[ov->packet_size - 1];             /* Get packet number */
3302         int max_raw = MAX_RAW_DATA_SIZE(ov->maxwidth, ov->maxheight);
3303         struct ov511_frame *frame = &ov->frame[ov->curframe];
3304         struct timeval *ts;
3305
3306         /* SOF/EOF packets have 1st to 8th bytes zeroed and the 9th
3307          * byte non-zero. The EOF packet has image width/height in the
3308          * 10th and 11th bytes. The 9th byte is given as follows:
3309          *
3310          * bit 7: EOF
3311          *     6: compression enabled
3312          *     5: 422/420/400 modes
3313          *     4: 422/420/400 modes
3314          *     3: 1
3315          *     2: snapshot button on
3316          *     1: snapshot frame
3317          *     0: even/odd field
3318          */
3319
3320         if (printph) {
3321                 info("ph(%3d): %2x %2x %2x %2x %2x %2x %2x %2x %2x %2x %2x %2x",
3322                      pnum, in[0], in[1], in[2], in[3], in[4], in[5], in[6],
3323                      in[7], in[8], in[9], in[10], in[11]);
3324         }
3325
3326         /* Check for SOF/EOF packet */
3327         if ((in[0] | in[1] | in[2] | in[3] | in[4] | in[5] | in[6] | in[7]) ||
3328             (~in[8] & 0x08))
3329                 goto check_middle;
3330
3331         /* Frame end */
3332         if (in[8] & 0x80) {
3333                 ts = (struct timeval *)(frame->data
3334                       + MAX_FRAME_SIZE(ov->maxwidth, ov->maxheight));
3335                 do_gettimeofday(ts);
3336
3337                 /* Get the actual frame size from the EOF header */
3338                 frame->rawwidth = ((int)(in[9]) + 1) * 8;
3339                 frame->rawheight = ((int)(in[10]) + 1) * 8;
3340
3341                 PDEBUG(4, "Frame end, frame=%d, pnum=%d, w=%d, h=%d, recvd=%d",
3342                         ov->curframe, pnum, frame->rawwidth, frame->rawheight,
3343                         frame->bytes_recvd);
3344
3345                 /* Validate the header data */
3346                 RESTRICT_TO_RANGE(frame->rawwidth, ov->minwidth, ov->maxwidth);
3347                 RESTRICT_TO_RANGE(frame->rawheight, ov->minheight,
3348                                   ov->maxheight);
3349
3350                 /* Don't allow byte count to exceed buffer size */
3351                 RESTRICT_TO_RANGE(frame->bytes_recvd, 8, max_raw);
3352
3353                 if (frame->scanstate == STATE_LINES) {
3354                         int nextf;
3355
3356                         frame->grabstate = FRAME_DONE;
3357                         wake_up_interruptible(&frame->wq);
3358
3359                         /* If next frame is ready or grabbing,
3360                          * point to it */
3361                         nextf = (ov->curframe + 1) % OV511_NUMFRAMES;
3362                         if (ov->frame[nextf].grabstate == FRAME_READY
3363                             || ov->frame[nextf].grabstate == FRAME_GRABBING) {
3364                                 ov->curframe = nextf;
3365                                 ov->frame[nextf].scanstate = STATE_SCANNING;
3366                         } else {
3367                                 if (frame->grabstate == FRAME_DONE) {
3368                                         PDEBUG(4, "** Frame done **");
3369                                 } else {
3370                                         PDEBUG(4, "Frame not ready? state = %d",
3371                                                 ov->frame[nextf].grabstate);
3372                                 }
3373
3374                                 ov->curframe = -1;
3375                         }
3376                 } else {
3377                         PDEBUG(5, "Frame done, but not scanning");
3378                 }
3379                 /* Image corruption caused by misplaced frame->segment = 0
3380                  * fixed by carlosf@conectiva.com.br
3381                  */
3382         } else {
3383                 /* Frame start */
3384                 PDEBUG(4, "Frame start, framenum = %d", ov->curframe);
3385
3386                 /* Check to see if it's a snapshot frame */
3387                 /* FIXME?? Should the snapshot reset go here? Performance? */
3388                 if (in[8] & 0x02) {
3389                         frame->snapshot = 1;
3390                         PDEBUG(3, "snapshot detected");
3391                 }
3392
3393                 frame->scanstate = STATE_LINES;
3394                 frame->bytes_recvd = 0;
3395                 frame->compressed = in[8] & 0x40;
3396         }
3397
3398 check_middle:
3399         /* Are we in a frame? */
3400         if (frame->scanstate != STATE_LINES) {
3401                 PDEBUG(5, "Not in a frame; packet skipped");
3402                 return;
3403         }
3404
3405         /* If frame start, skip header */
3406         if (frame->bytes_recvd == 0)
3407                 offset = 9;
3408         else
3409                 offset = 0;
3410
3411         num = n - offset - 1;
3412
3413         /* Dump all data exactly as received */
3414         if (dumppix == 2) {
3415                 frame->bytes_recvd += n - 1;
3416                 if (frame->bytes_recvd <= max_raw)
3417                         memcpy(frame->rawdata + frame->bytes_recvd - (n - 1),
3418                                 in, n - 1);
3419                 else
3420                         PDEBUG(3, "Raw data buffer overrun!! (%d)",
3421                                 frame->bytes_recvd - max_raw);
3422         } else if (!frame->compressed && !remove_zeros) {
3423                 frame->bytes_recvd += num;
3424                 if (frame->bytes_recvd <= max_raw)
3425                         memcpy(frame->rawdata + frame->bytes_recvd - num,
3426                                 in + offset, num);
3427                 else
3428                         PDEBUG(3, "Raw data buffer overrun!! (%d)",
3429                                 frame->bytes_recvd - max_raw);
3430         } else { /* Remove all-zero FIFO lines (aligned 32-byte blocks) */
3431                 int b, read = 0, allzero, copied = 0;
3432                 if (offset) {
3433                         frame->bytes_recvd += 32 - offset;      // Bytes out
3434                         memcpy(frame->rawdata,  in + offset, 32 - offset);
3435                         read += 32;
3436                 }
3437
3438                 while (read < n - 1) {
3439                         allzero = 1;
3440                         for (b = 0; b < 32; b++) {
3441                                 if (in[read + b]) {
3442                                         allzero = 0;
3443                                         break;
3444                                 }
3445                         }
3446
3447                         if (allzero) {
3448                                 /* Don't copy it */
3449                         } else {
3450                                 if (frame->bytes_recvd + copied + 32 <= max_raw)
3451                                 {
3452                                         memcpy(frame->rawdata
3453                                                 + frame->bytes_recvd + copied,
3454                                                 in + read, 32);
3455                                         copied += 32;
3456                                 } else {
3457                                         PDEBUG(3, "Raw data buffer overrun!!");
3458                                 }
3459                         }
3460                         read += 32;
3461                 }
3462
3463                 frame->bytes_recvd += copied;
3464         }
3465 }
3466
3467 static inline void
3468 ov518_move_data(struct usb_ov511 *ov, unsigned char *in, int n)
3469 {
3470         int max_raw = MAX_RAW_DATA_SIZE(ov->maxwidth, ov->maxheight);
3471         struct ov511_frame *frame = &ov->frame[ov->curframe];
3472         struct timeval *ts;
3473
3474         /* Don't copy the packet number byte */
3475         if (ov->packet_numbering)
3476                 --n;
3477
3478         /* A false positive here is likely, until OVT gives me
3479          * the definitive SOF/EOF format */
3480         if ((!(in[0] | in[1] | in[2] | in[3] | in[5])) && in[6]) {
3481                 if (printph) {
3482                         info("ph: %2x %2x %2x %2x %2x %2x %2x %2x", in[0],
3483                              in[1], in[2], in[3], in[4], in[5], in[6], in[7]);
3484                 }
3485
3486                 if (frame->scanstate == STATE_LINES) {
3487                         PDEBUG(4, "Detected frame end/start");
3488                         goto eof;
3489                 } else { //scanstate == STATE_SCANNING
3490                         /* Frame start */
3491                         PDEBUG(4, "Frame start, framenum = %d", ov->curframe);
3492                         goto sof;
3493                 }
3494         } else {
3495                 goto check_middle;
3496         }
3497
3498 eof:
3499         ts = (struct timeval *)(frame->data
3500               + MAX_FRAME_SIZE(ov->maxwidth, ov->maxheight));
3501         do_gettimeofday(ts);
3502
3503         PDEBUG(4, "Frame end, curframe = %d, hw=%d, vw=%d, recvd=%d",
3504                 ov->curframe,
3505                 (int)(in[9]), (int)(in[10]), frame->bytes_recvd);
3506
3507         // FIXME: Since we don't know the header formats yet,
3508         // there is no way to know what the actual image size is
3509         frame->rawwidth = frame->width;
3510         frame->rawheight = frame->height;
3511
3512         /* Validate the header data */
3513         RESTRICT_TO_RANGE(frame->rawwidth, ov->minwidth, ov->maxwidth);
3514         RESTRICT_TO_RANGE(frame->rawheight, ov->minheight, ov->maxheight);
3515
3516         /* Don't allow byte count to exceed buffer size */
3517         RESTRICT_TO_RANGE(frame->bytes_recvd, 8, max_raw);
3518
3519         if (frame->scanstate == STATE_LINES) {
3520                 int nextf;
3521
3522                 frame->grabstate = FRAME_DONE;
3523                 wake_up_interruptible(&frame->wq);
3524
3525                 /* If next frame is ready or grabbing,
3526                  * point to it */
3527                 nextf = (ov->curframe + 1) % OV511_NUMFRAMES;
3528                 if (ov->frame[nextf].grabstate == FRAME_READY
3529                     || ov->frame[nextf].grabstate == FRAME_GRABBING) {
3530                         ov->curframe = nextf;
3531                         ov->frame[nextf].scanstate = STATE_SCANNING;
3532                         frame = &ov->frame[nextf];
3533                 } else {
3534                         if (frame->grabstate == FRAME_DONE) {
3535                                 PDEBUG(4, "** Frame done **");
3536                         } else {
3537                                 PDEBUG(4, "Frame not ready? state = %d",
3538                                        ov->frame[nextf].grabstate);
3539                         }
3540
3541                         ov->curframe = -1;
3542                         PDEBUG(4, "SOF dropped (no active frame)");
3543                         return;  /* Nowhere to store this frame */
3544                 }
3545         }
3546 sof:
3547         PDEBUG(4, "Starting capture on frame %d", frame->framenum);
3548
3549 // Snapshot not reverse-engineered yet.
3550 #if 0
3551         /* Check to see if it's a snapshot frame */
3552         /* FIXME?? Should the snapshot reset go here? Performance? */
3553         if (in[8] & 0x02) {
3554                 frame->snapshot = 1;
3555                 PDEBUG(3, "snapshot detected");
3556         }
3557 #endif
3558         frame->scanstate = STATE_LINES;
3559         frame->bytes_recvd = 0;
3560         frame->compressed = 1;
3561
3562 check_middle:
3563         /* Are we in a frame? */
3564         if (frame->scanstate != STATE_LINES) {
3565                 PDEBUG(4, "scanstate: no SOF yet");
3566                 return;
3567         }
3568
3569         /* Dump all data exactly as received */
3570         if (dumppix == 2) {
3571                 frame->bytes_recvd += n;
3572                 if (frame->bytes_recvd <= max_raw)
3573                         memcpy(frame->rawdata + frame->bytes_recvd - n, in, n);
3574                 else
3575                         PDEBUG(3, "Raw data buffer overrun!! (%d)",
3576                                 frame->bytes_recvd - max_raw);
3577         } else {
3578                 /* All incoming data are divided into 8-byte segments. If the
3579                  * segment contains all zero bytes, it must be skipped. These
3580                  * zero-segments allow the OV518 to mainain a constant data rate
3581                  * regardless of the effectiveness of the compression. Segments
3582                  * are aligned relative to the beginning of each isochronous
3583                  * packet. The first segment in each image is a header (the
3584                  * decompressor skips it later).
3585                  */
3586
3587                 int b, read = 0, allzero, copied = 0;
3588
3589                 while (read < n) {
3590                         allzero = 1;
3591                         for (b = 0; b < 8; b++) {
3592                                 if (in[read + b]) {
3593                                         allzero = 0;
3594                                         break;
3595                                 }
3596                         }
3597
3598                         if (allzero) {
3599                         /* Don't copy it */
3600                         } else {
3601                                 if (frame->bytes_recvd + copied + 8 <= max_raw)
3602                                 {
3603                                         memcpy(frame->rawdata
3604                                                 + frame->bytes_recvd + copied,
3605                                                 in + read, 8);
3606                                         copied += 8;
3607                                 } else {
3608                                         PDEBUG(3, "Raw data buffer overrun!!");
3609                                 }
3610                         }
3611                         read += 8;
3612                 }
3613                 frame->bytes_recvd += copied;
3614         }
3615 }
3616
3617 static void
3618 ov51x_isoc_irq(struct urb *urb, struct pt_regs *regs)
3619 {
3620         int i;
3621         struct usb_ov511 *ov;
3622         struct ov511_sbuf *sbuf;
3623
3624         if (!urb->context) {
3625                 PDEBUG(4, "no context");
3626                 return;
3627         }
3628
3629         sbuf = urb->context;
3630         ov = sbuf->ov;
3631
3632         if (!ov || !ov->dev || !ov->user) {
3633                 PDEBUG(4, "no device, or not open");
3634                 return;
3635         }
3636
3637         if (!ov->streaming) {
3638                 PDEBUG(4, "hmmm... not streaming, but got interrupt");
3639                 return;
3640         }
3641
3642         if (urb->status == -ENOENT || urb->status == -ECONNRESET) {
3643                 PDEBUG(4, "URB unlinked");
3644                 return;
3645         }
3646
3647         if (urb->status != -EINPROGRESS && urb->status != 0) {
3648                 err("ERROR: urb->status=%d: %s", urb->status,
3649                     symbolic(urb_errlist, urb->status));
3650         }
3651
3652         /* Copy the data received into our frame buffer */
3653         PDEBUG(5, "sbuf[%d]: Moving %d packets", sbuf->n,
3654                urb->number_of_packets);
3655         for (i = 0; i < urb->number_of_packets; i++) {
3656                 /* Warning: Don't call *_move_data() if no frame active! */
3657                 if (ov->curframe >= 0) {
3658                         int n = urb->iso_frame_desc[i].actual_length;
3659                         int st = urb->iso_frame_desc[i].status;
3660                         unsigned char *cdata;
3661
3662                         urb->iso_frame_desc[i].actual_length = 0;
3663                         urb->iso_frame_desc[i].status = 0;
3664
3665                         cdata = urb->transfer_buffer
3666                                 + urb->iso_frame_desc[i].offset;
3667
3668                         if (!n) {
3669                                 PDEBUG(4, "Zero-length packet");
3670                                 continue;
3671                         }
3672
3673                         if (st)
3674                                 PDEBUG(2, "data error: [%d] len=%d, status=%d",
3675                                        i, n, st);
3676
3677                         if (ov->bclass == BCL_OV511)
3678                                 ov511_move_data(ov, cdata, n);
3679                         else if (ov->bclass == BCL_OV518)
3680                                 ov518_move_data(ov, cdata, n);
3681                         else
3682                                 err("Unknown bridge device (%d)", ov->bridge);
3683
3684                 } else if (waitqueue_active(&ov->wq)) {
3685                         wake_up_interruptible(&ov->wq);
3686                 }
3687         }
3688
3689         /* Resubmit this URB */
3690         urb->dev = ov->dev;
3691         if ((i = usb_submit_urb(urb, GFP_ATOMIC)) != 0)
3692                 err("usb_submit_urb() ret %d", i);
3693
3694         return;
3695 }
3696
3697 /****************************************************************************
3698  *
3699  * Stream initialization and termination
3700  *
3701  ***************************************************************************/
3702
3703 static int
3704 ov51x_init_isoc(struct usb_ov511 *ov)
3705 {
3706         struct urb *urb;
3707         int fx, err, n, size;
3708
3709         PDEBUG(3, "*** Initializing capture ***");
3710
3711         ov->curframe = -1;
3712
3713         if (ov->bridge == BRG_OV511) {
3714                 if (cams == 1)
3715                         size = 993;
3716                 else if (cams == 2)
3717                         size = 513;
3718                 else if (cams == 3 || cams == 4)
3719                         size = 257;
3720                 else {
3721                         err("\"cams\" parameter too high!");
3722                         return -1;
3723                 }
3724         } else if (ov->bridge == BRG_OV511PLUS) {
3725                 if (cams == 1)
3726                         size = 961;
3727                 else if (cams == 2)
3728                         size = 513;
3729                 else if (cams == 3 || cams == 4)
3730                         size = 257;
3731                 else if (cams >= 5 && cams <= 8)
3732                         size = 129;
3733                 else if (cams >= 9 && cams <= 31)
3734                         size = 33;
3735                 else {
3736                         err("\"cams\" parameter too high!");
3737                         return -1;
3738                 }
3739         } else if (ov->bclass == BCL_OV518) {
3740                 if (cams == 1)
3741                         size = 896;
3742                 else if (cams == 2)
3743                         size = 512;
3744                 else if (cams == 3 || cams == 4)
3745                         size = 256;
3746                 else if (cams >= 5 && cams <= 8)
3747                         size = 128;
3748                 else {
3749                         err("\"cams\" parameter too high!");
3750                         return -1;
3751                 }
3752         } else {
3753                 err("invalid bridge type");
3754                 return -1;
3755         }
3756
3757         // FIXME: OV518 is hardcoded to 15 FPS (alternate 5) for now
3758         if (ov->bclass == BCL_OV518) {
3759                 if (packetsize == -1) {
3760                         ov518_set_packet_size(ov, 640);
3761                 } else {
3762                         info("Forcing packet size to %d", packetsize);
3763                         ov518_set_packet_size(ov, packetsize);
3764                 }
3765         } else {
3766                 if (packetsize == -1) {
3767                         ov511_set_packet_size(ov, size);
3768                 } else {
3769                         info("Forcing packet size to %d", packetsize);
3770                         ov511_set_packet_size(ov, packetsize);
3771                 }
3772         }
3773
3774         for (n = 0; n < OV511_NUMSBUF; n++) {
3775                 urb = usb_alloc_urb(FRAMES_PER_DESC, GFP_KERNEL);
3776                 if (!urb) {
3777                         err("init isoc: usb_alloc_urb ret. NULL");
3778                         return -ENOMEM;
3779                 }
3780                 ov->sbuf[n].urb = urb;
3781                 urb->dev = ov->dev;
3782                 urb->context = &ov->sbuf[n];
3783                 urb->pipe = usb_rcvisocpipe(ov->dev, OV511_ENDPOINT_ADDRESS);
3784                 urb->transfer_flags = URB_ISO_ASAP;
3785                 urb->transfer_buffer = ov->sbuf[n].data;
3786                 urb->complete = ov51x_isoc_irq;
3787                 urb->number_of_packets = FRAMES_PER_DESC;
3788                 urb->transfer_buffer_length = ov->packet_size * FRAMES_PER_DESC;
3789                 urb->interval = 1;
3790                 for (fx = 0; fx < FRAMES_PER_DESC; fx++) {
3791                         urb->iso_frame_desc[fx].offset = ov->packet_size * fx;
3792                         urb->iso_frame_desc[fx].length = ov->packet_size;
3793                 }
3794         }
3795
3796         ov->streaming = 1;
3797
3798         for (n = 0; n < OV511_NUMSBUF; n++) {
3799                 ov->sbuf[n].urb->dev = ov->dev;
3800                 err = usb_submit_urb(ov->sbuf[n].urb, GFP_KERNEL);
3801                 if (err) {
3802                         err("init isoc: usb_submit_urb(%d) ret %d", n, err);
3803                         return err;
3804                 }
3805         }
3806
3807         return 0;
3808 }
3809
3810 static void
3811 ov51x_unlink_isoc(struct usb_ov511 *ov)
3812 {
3813         int n;
3814
3815         /* Unschedule all of the iso td's */
3816         for (n = OV511_NUMSBUF - 1; n >= 0; n--) {
3817                 if (ov->sbuf[n].urb) {
3818                         usb_kill_urb(ov->sbuf[n].urb);
3819                         usb_free_urb(ov->sbuf[n].urb);
3820                         ov->sbuf[n].urb = NULL;
3821                 }
3822         }
3823 }
3824
3825 static void
3826 ov51x_stop_isoc(struct usb_ov511 *ov)
3827 {
3828         if (!ov->streaming || !ov->dev)
3829                 return;
3830
3831         PDEBUG(3, "*** Stopping capture ***");
3832
3833         if (ov->bclass == BCL_OV518)
3834                 ov518_set_packet_size(ov, 0);
3835         else
3836                 ov511_set_packet_size(ov, 0);
3837
3838         ov->streaming = 0;
3839
3840         ov51x_unlink_isoc(ov);
3841 }
3842
3843 static int
3844 ov51x_new_frame(struct usb_ov511 *ov, int framenum)
3845 {
3846         struct ov511_frame *frame;
3847         int newnum;
3848
3849         PDEBUG(4, "ov->curframe = %d, framenum = %d", ov->curframe, framenum);
3850
3851         if (!ov->dev)
3852                 return -1;
3853
3854         /* If we're not grabbing a frame right now and the other frame is */
3855         /* ready to be grabbed into, then use it instead */
3856         if (ov->curframe == -1) {
3857                 newnum = (framenum - 1 + OV511_NUMFRAMES) % OV511_NUMFRAMES;
3858                 if (ov->frame[newnum].grabstate == FRAME_READY)
3859                         framenum = newnum;
3860         } else
3861                 return 0;
3862
3863         frame = &ov->frame[framenum];
3864
3865         PDEBUG(4, "framenum = %d, width = %d, height = %d", framenum,
3866                frame->width, frame->height);
3867
3868         frame->grabstate = FRAME_GRABBING;
3869         frame->scanstate = STATE_SCANNING;
3870         frame->snapshot = 0;
3871
3872         ov->curframe = framenum;
3873
3874         /* Make sure it's not too big */
3875         if (frame->width > ov->maxwidth)
3876                 frame->width = ov->maxwidth;
3877
3878         frame->width &= ~7L;            /* Multiple of 8 */
3879
3880         if (frame->height > ov->maxheight)
3881                 frame->height = ov->maxheight;
3882
3883         frame->height &= ~3L;           /* Multiple of 4 */
3884
3885         return 0;
3886 }
3887
3888 /****************************************************************************
3889  *
3890  * Buffer management
3891  *
3892  ***************************************************************************/
3893
3894 /*
3895  * - You must acquire buf_lock before entering this function.
3896  * - Because this code will free any non-null pointer, you must be sure to null
3897  *   them if you explicitly free them somewhere else!
3898  */
3899 static void
3900 ov51x_do_dealloc(struct usb_ov511 *ov)
3901 {
3902         int i;
3903         PDEBUG(4, "entered");
3904
3905         if (ov->fbuf) {
3906                 rvfree(ov->fbuf, OV511_NUMFRAMES
3907                        * MAX_DATA_SIZE(ov->maxwidth, ov->maxheight));
3908                 ov->fbuf = NULL;
3909         }
3910
3911         vfree(ov->rawfbuf);
3912         ov->rawfbuf = NULL;
3913
3914         vfree(ov->tempfbuf);
3915         ov->tempfbuf = NULL;
3916
3917         for (i = 0; i < OV511_NUMSBUF; i++) {
3918                 kfree(ov->sbuf[i].data);
3919                 ov->sbuf[i].data = NULL;
3920         }
3921
3922         for (i = 0; i < OV511_NUMFRAMES; i++) {
3923                 ov->frame[i].data = NULL;
3924                 ov->frame[i].rawdata = NULL;
3925                 ov->frame[i].tempdata = NULL;
3926                 if (ov->frame[i].compbuf) {
3927                         free_page((unsigned long) ov->frame[i].compbuf);
3928                         ov->frame[i].compbuf = NULL;
3929                 }
3930         }
3931
3932         PDEBUG(4, "buffer memory deallocated");
3933         ov->buf_state = BUF_NOT_ALLOCATED;
3934         PDEBUG(4, "leaving");
3935 }
3936
3937 static int
3938 ov51x_alloc(struct usb_ov511 *ov)
3939 {
3940         int i;
3941         const int w = ov->maxwidth;
3942         const int h = ov->maxheight;
3943         const int data_bufsize = OV511_NUMFRAMES * MAX_DATA_SIZE(w, h);
3944         const int raw_bufsize = OV511_NUMFRAMES * MAX_RAW_DATA_SIZE(w, h);
3945
3946         PDEBUG(4, "entered");
3947         down(&ov->buf_lock);
3948
3949         if (ov->buf_state == BUF_ALLOCATED)
3950                 goto out;
3951
3952         ov->fbuf = rvmalloc(data_bufsize);
3953         if (!ov->fbuf)
3954                 goto error;
3955
3956         ov->rawfbuf = vmalloc(raw_bufsize);
3957         if (!ov->rawfbuf)
3958                 goto error;
3959
3960         memset(ov->rawfbuf, 0, raw_bufsize);
3961
3962         ov->tempfbuf = vmalloc(raw_bufsize);
3963         if (!ov->tempfbuf)
3964                 goto error;
3965
3966         memset(ov->tempfbuf, 0, raw_bufsize);
3967
3968         for (i = 0; i < OV511_NUMSBUF; i++) {
3969                 ov->sbuf[i].data = kmalloc(FRAMES_PER_DESC *
3970                         MAX_FRAME_SIZE_PER_DESC, GFP_KERNEL);
3971                 if (!ov->sbuf[i].data)
3972                         goto error;
3973
3974                 PDEBUG(4, "sbuf[%d] @ %p", i, ov->sbuf[i].data);
3975         }
3976
3977         for (i = 0; i < OV511_NUMFRAMES; i++) {
3978                 ov->frame[i].data = ov->fbuf + i * MAX_DATA_SIZE(w, h);
3979                 ov->frame[i].rawdata = ov->rawfbuf
3980                  + i * MAX_RAW_DATA_SIZE(w, h);
3981                 ov->frame[i].tempdata = ov->tempfbuf
3982                  + i * MAX_RAW_DATA_SIZE(w, h);
3983
3984                 ov->frame[i].compbuf =
3985                  (unsigned char *) __get_free_page(GFP_KERNEL);
3986                 if (!ov->frame[i].compbuf)
3987                         goto error;
3988
3989                 PDEBUG(4, "frame[%d] @ %p", i, ov->frame[i].data);
3990         }
3991
3992         ov->buf_state = BUF_ALLOCATED;
3993 out:
3994         up(&ov->buf_lock);
3995         PDEBUG(4, "leaving");
3996         return 0;
3997 error:
3998         ov51x_do_dealloc(ov);
3999         up(&ov->buf_lock);
4000         PDEBUG(4, "errored");
4001         return -ENOMEM;
4002 }
4003
4004 static void
4005 ov51x_dealloc(struct usb_ov511 *ov)
4006 {
4007         PDEBUG(4, "entered");
4008         down(&ov->buf_lock);
4009         ov51x_do_dealloc(ov);
4010         up(&ov->buf_lock);
4011         PDEBUG(4, "leaving");
4012 }
4013
4014 /****************************************************************************
4015  *
4016  * V4L 1 API
4017  *
4018  ***************************************************************************/
4019
4020 static int
4021 ov51x_v4l1_open(struct inode *inode, struct file *file)
4022 {
4023         struct video_device *vdev = video_devdata(file);
4024         struct usb_ov511 *ov = video_get_drvdata(vdev);
4025         int err, i;
4026
4027         PDEBUG(4, "opening");
4028
4029         down(&ov->lock);
4030
4031         err = -EBUSY;
4032         if (ov->user)
4033                 goto out;
4034
4035         ov->sub_flag = 0;
4036
4037         /* In case app doesn't set them... */
4038         err = ov51x_set_default_params(ov);
4039         if (err < 0)
4040                 goto out;
4041
4042         /* Make sure frames are reset */
4043         for (i = 0; i < OV511_NUMFRAMES; i++) {
4044                 ov->frame[i].grabstate = FRAME_UNUSED;
4045                 ov->frame[i].bytes_read = 0;
4046         }
4047
4048         /* If compression is on, make sure now that a
4049          * decompressor can be loaded */
4050         if (ov->compress && !ov->decomp_ops) {
4051                 err = request_decompressor(ov);
4052                 if (err && !dumppix)
4053                         goto out;
4054         }
4055
4056         err = ov51x_alloc(ov);
4057         if (err < 0)
4058                 goto out;
4059
4060         err = ov51x_init_isoc(ov);
4061         if (err) {
4062                 ov51x_dealloc(ov);
4063                 goto out;
4064         }
4065
4066         ov->user++;
4067         file->private_data = vdev;
4068
4069         if (ov->led_policy == LED_AUTO)
4070                 ov51x_led_control(ov, 1);
4071
4072 out:
4073         up(&ov->lock);
4074         return err;
4075 }
4076
4077 static int
4078 ov51x_v4l1_close(struct inode *inode, struct file *file)
4079 {
4080         struct video_device *vdev = file->private_data;
4081         struct usb_ov511 *ov = video_get_drvdata(vdev);
4082
4083         PDEBUG(4, "ov511_close");
4084
4085         down(&ov->lock);
4086
4087         ov->user--;
4088         ov51x_stop_isoc(ov);
4089
4090         release_decompressor(ov);
4091
4092         if (ov->led_policy == LED_AUTO)
4093                 ov51x_led_control(ov, 0);
4094
4095         if (ov->dev)
4096                 ov51x_dealloc(ov);
4097
4098         up(&ov->lock);
4099
4100         /* Device unplugged while open. Only a minimum of unregistration is done
4101          * here; the disconnect callback already did the rest. */
4102         if (!ov->dev) {
4103                 down(&ov->cbuf_lock);
4104                 kfree(ov->cbuf);
4105                 ov->cbuf = NULL;
4106                 up(&ov->cbuf_lock);
4107
4108                 ov51x_dealloc(ov);
4109                 kfree(ov);
4110                 ov = NULL;
4111         }
4112
4113         file->private_data = NULL;
4114         return 0;
4115 }
4116
4117 /* Do not call this function directly! */
4118 static int
4119 ov51x_v4l1_ioctl_internal(struct inode *inode, struct file *file,
4120                           unsigned int cmd, void *arg)
4121 {
4122         struct video_device *vdev = file->private_data;
4123         struct usb_ov511 *ov = video_get_drvdata(vdev);
4124         PDEBUG(5, "IOCtl: 0x%X", cmd);
4125
4126         if (!ov->dev)
4127                 return -EIO;
4128
4129         switch (cmd) {
4130         case VIDIOCGCAP:
4131         {
4132                 struct video_capability *b = arg;
4133
4134                 PDEBUG(4, "VIDIOCGCAP");
4135
4136                 memset(b, 0, sizeof(struct video_capability));
4137                 sprintf(b->name, "%s USB Camera",
4138                         symbolic(brglist, ov->bridge));
4139                 b->type = VID_TYPE_CAPTURE | VID_TYPE_SUBCAPTURE;
4140                 b->channels = ov->num_inputs;
4141                 b->audios = 0;
4142                 b->maxwidth = ov->maxwidth;
4143                 b->maxheight = ov->maxheight;
4144                 b->minwidth = ov->minwidth;
4145                 b->minheight = ov->minheight;
4146
4147                 return 0;
4148         }
4149         case VIDIOCGCHAN:
4150         {
4151                 struct video_channel *v = arg;
4152
4153                 PDEBUG(4, "VIDIOCGCHAN");
4154
4155                 if ((unsigned)(v->channel) >= ov->num_inputs) {
4156                         err("Invalid channel (%d)", v->channel);
4157                         return -EINVAL;
4158                 }
4159
4160                 v->norm = ov->norm;
4161                 v->type = VIDEO_TYPE_CAMERA;
4162                 v->flags = 0;
4163 //              v->flags |= (ov->has_decoder) ? VIDEO_VC_NORM : 0;
4164                 v->tuners = 0;
4165                 decoder_get_input_name(ov, v->channel, v->name);
4166
4167                 return 0;
4168         }
4169         case VIDIOCSCHAN:
4170         {
4171                 struct video_channel *v = arg;
4172                 int err;
4173
4174                 PDEBUG(4, "VIDIOCSCHAN");
4175
4176                 /* Make sure it's not a camera */
4177                 if (!ov->has_decoder) {
4178                         if (v->channel == 0)
4179                                 return 0;
4180                         else
4181                                 return -EINVAL;
4182                 }
4183
4184                 if (v->norm != VIDEO_MODE_PAL &&
4185                     v->norm != VIDEO_MODE_NTSC &&
4186                     v->norm != VIDEO_MODE_SECAM &&
4187                     v->norm != VIDEO_MODE_AUTO) {
4188                         err("Invalid norm (%d)", v->norm);
4189                         return -EINVAL;
4190                 }
4191
4192                 if ((unsigned)(v->channel) >= ov->num_inputs) {
4193                         err("Invalid channel (%d)", v->channel);
4194                         return -EINVAL;
4195                 }
4196
4197                 err = decoder_set_input(ov, v->channel);
4198                 if (err)
4199                         return err;
4200
4201                 err = decoder_set_norm(ov, v->norm);
4202                 if (err)
4203                         return err;
4204
4205                 return 0;
4206         }
4207         case VIDIOCGPICT:
4208         {
4209                 struct video_picture *p = arg;
4210
4211                 PDEBUG(4, "VIDIOCGPICT");
4212
4213                 memset(p, 0, sizeof(struct video_picture));
4214                 if (sensor_get_picture(ov, p))
4215                         return -EIO;
4216
4217                 /* Can we get these from frame[0]? -claudio? */
4218                 p->depth = ov->frame[0].depth;
4219                 p->palette = ov->frame[0].format;
4220
4221                 return 0;
4222         }
4223         case VIDIOCSPICT:
4224         {
4225                 struct video_picture *p = arg;
4226                 int i, rc;
4227
4228                 PDEBUG(4, "VIDIOCSPICT");
4229
4230                 if (!get_depth(p->palette))
4231                         return -EINVAL;
4232
4233                 if (sensor_set_picture(ov, p))
4234                         return -EIO;
4235
4236                 if (force_palette && p->palette != force_palette) {
4237                         info("Palette rejected (%s)",
4238                              symbolic(v4l1_plist, p->palette));
4239                         return -EINVAL;
4240                 }
4241
4242                 // FIXME: Format should be independent of frames
4243                 if (p->palette != ov->frame[0].format) {
4244                         PDEBUG(4, "Detected format change");
4245
4246                         rc = ov51x_wait_frames_inactive(ov);
4247                         if (rc)
4248                                 return rc;
4249
4250                         mode_init_regs(ov, ov->frame[0].width,
4251                                 ov->frame[0].height, p->palette, ov->sub_flag);
4252                 }
4253
4254                 PDEBUG(4, "Setting depth=%d, palette=%s",
4255                        p->depth, symbolic(v4l1_plist, p->palette));
4256
4257                 for (i = 0; i < OV511_NUMFRAMES; i++) {
4258                         ov->frame[i].depth = p->depth;
4259                         ov->frame[i].format = p->palette;
4260                 }
4261
4262                 return 0;
4263         }
4264         case VIDIOCGCAPTURE:
4265         {
4266                 int *vf = arg;
4267
4268                 PDEBUG(4, "VIDIOCGCAPTURE");
4269
4270                 ov->sub_flag = *vf;
4271                 return 0;
4272         }
4273         case VIDIOCSCAPTURE:
4274         {
4275                 struct video_capture *vc = arg;
4276
4277                 PDEBUG(4, "VIDIOCSCAPTURE");
4278
4279                 if (vc->flags)
4280                         return -EINVAL;
4281                 if (vc->decimation)
4282                         return -EINVAL;
4283
4284                 vc->x &= ~3L;
4285                 vc->y &= ~1L;
4286                 vc->y &= ~31L;
4287
4288                 if (vc->width == 0)
4289                         vc->width = 32;
4290
4291                 vc->height /= 16;
4292                 vc->height *= 16;
4293                 if (vc->height == 0)
4294                         vc->height = 16;
4295
4296                 ov->subx = vc->x;
4297                 ov->suby = vc->y;
4298                 ov->subw = vc->width;
4299                 ov->subh = vc->height;
4300
4301                 return 0;
4302         }
4303         case VIDIOCSWIN:
4304         {
4305                 struct video_window *vw = arg;
4306                 int i, rc;
4307
4308                 PDEBUG(4, "VIDIOCSWIN: %dx%d", vw->width, vw->height);
4309
4310 #if 0
4311                 if (vw->flags)
4312                         return -EINVAL;
4313                 if (vw->clipcount)
4314                         return -EINVAL;
4315                 if (vw->height != ov->maxheight)
4316                         return -EINVAL;
4317                 if (vw->width != ov->maxwidth)
4318                         return -EINVAL;
4319 #endif
4320
4321                 rc = ov51x_wait_frames_inactive(ov);
4322                 if (rc)
4323                         return rc;
4324
4325                 rc = mode_init_regs(ov, vw->width, vw->height,
4326                         ov->frame[0].format, ov->sub_flag);
4327                 if (rc < 0)
4328                         return rc;
4329
4330                 for (i = 0; i < OV511_NUMFRAMES; i++) {
4331                         ov->frame[i].width = vw->width;
4332                         ov->frame[i].height = vw->height;
4333                 }
4334
4335                 return 0;
4336         }
4337         case VIDIOCGWIN:
4338         {
4339                 struct video_window *vw = arg;
4340
4341                 memset(vw, 0, sizeof(struct video_window));
4342                 vw->x = 0;              /* FIXME */
4343                 vw->y = 0;
4344                 vw->width = ov->frame[0].width;
4345                 vw->height = ov->frame[0].height;
4346                 vw->flags = 30;
4347
4348                 PDEBUG(4, "VIDIOCGWIN: %dx%d", vw->width, vw->height);
4349
4350                 return 0;
4351         }
4352         case VIDIOCGMBUF:
4353         {
4354                 struct video_mbuf *vm = arg;
4355                 int i;
4356
4357                 PDEBUG(4, "VIDIOCGMBUF");
4358
4359                 memset(vm, 0, sizeof(struct video_mbuf));
4360                 vm->size = OV511_NUMFRAMES
4361                            * MAX_DATA_SIZE(ov->maxwidth, ov->maxheight);
4362                 vm->frames = OV511_NUMFRAMES;
4363
4364                 vm->offsets[0] = 0;
4365                 for (i = 1; i < OV511_NUMFRAMES; i++) {
4366                         vm->offsets[i] = vm->offsets[i-1]
4367                            + MAX_DATA_SIZE(ov->maxwidth, ov->maxheight);
4368                 }
4369
4370                 return 0;
4371         }
4372         case VIDIOCMCAPTURE:
4373         {
4374                 struct video_mmap *vm = arg;
4375                 int rc, depth;
4376                 unsigned int f = vm->frame;
4377
4378                 PDEBUG(4, "VIDIOCMCAPTURE: frame: %d, %dx%d, %s", f, vm->width,
4379                         vm->height, symbolic(v4l1_plist, vm->format));
4380
4381                 depth = get_depth(vm->format);
4382                 if (!depth) {
4383                         PDEBUG(2, "VIDIOCMCAPTURE: invalid format (%s)",
4384                                symbolic(v4l1_plist, vm->format));
4385                         return -EINVAL;
4386                 }
4387
4388                 if (f >= OV511_NUMFRAMES) {
4389                         err("VIDIOCMCAPTURE: invalid frame (%d)", f);
4390                         return -EINVAL;
4391                 }
4392
4393                 if (vm->width > ov->maxwidth
4394                     || vm->height > ov->maxheight) {
4395                         err("VIDIOCMCAPTURE: requested dimensions too big");
4396                         return -EINVAL;
4397                 }
4398
4399                 if (ov->frame[f].grabstate == FRAME_GRABBING) {
4400                         PDEBUG(4, "VIDIOCMCAPTURE: already grabbing");
4401                         return -EBUSY;
4402                 }
4403
4404                 if (force_palette && (vm->format != force_palette)) {
4405                         PDEBUG(2, "palette rejected (%s)",
4406                                symbolic(v4l1_plist, vm->format));
4407                         return -EINVAL;
4408                 }
4409
4410                 if ((ov->frame[f].width != vm->width) ||
4411                     (ov->frame[f].height != vm->height) ||
4412                     (ov->frame[f].format != vm->format) ||
4413                     (ov->frame[f].sub_flag != ov->sub_flag) ||
4414                     (ov->frame[f].depth != depth)) {
4415                         PDEBUG(4, "VIDIOCMCAPTURE: change in image parameters");
4416
4417                         rc = ov51x_wait_frames_inactive(ov);
4418                         if (rc)
4419                                 return rc;
4420
4421                         rc = mode_init_regs(ov, vm->width, vm->height,
4422                                 vm->format, ov->sub_flag);
4423 #if 0
4424                         if (rc < 0) {
4425                                 PDEBUG(1, "Got error while initializing regs ");
4426                                 return ret;
4427                         }
4428 #endif
4429                         ov->frame[f].width = vm->width;
4430                         ov->frame[f].height = vm->height;
4431                         ov->frame[f].format = vm->format;
4432                         ov->frame[f].sub_flag = ov->sub_flag;
4433                         ov->frame[f].depth = depth;
4434                 }
4435
4436                 /* Mark it as ready */
4437                 ov->frame[f].grabstate = FRAME_READY;
4438
4439                 PDEBUG(4, "VIDIOCMCAPTURE: renewing frame %d", f);
4440
4441                 return ov51x_new_frame(ov, f);
4442         }
4443         case VIDIOCSYNC:
4444         {
4445                 unsigned int fnum = *((unsigned int *) arg);
4446                 struct ov511_frame *frame;
4447                 int rc;
4448
4449                 if (fnum >= OV511_NUMFRAMES) {
4450                         err("VIDIOCSYNC: invalid frame (%d)", fnum);
4451                         return -EINVAL;
4452                 }
4453
4454                 frame = &ov->frame[fnum];
4455
4456                 PDEBUG(4, "syncing to frame %d, grabstate = %d", fnum,
4457                        frame->grabstate);
4458
4459                 switch (frame->grabstate) {
4460                 case FRAME_UNUSED:
4461                         return -EINVAL;
4462                 case FRAME_READY:
4463                 case FRAME_GRABBING:
4464                 case FRAME_ERROR:
4465 redo:
4466                         if (!ov->dev)
4467                                 return -EIO;
4468
4469                         rc = wait_event_interruptible(frame->wq,
4470                             (frame->grabstate == FRAME_DONE)
4471                             || (frame->grabstate == FRAME_ERROR));
4472
4473                         if (rc)
4474                                 return rc;
4475
4476                         if (frame->grabstate == FRAME_ERROR) {
4477                                 if ((rc = ov51x_new_frame(ov, fnum)) < 0)
4478                                         return rc;
4479                                 goto redo;
4480                         }
4481                         /* Fall through */
4482                 case FRAME_DONE:
4483                         if (ov->snap_enabled && !frame->snapshot) {
4484                                 if ((rc = ov51x_new_frame(ov, fnum)) < 0)
4485                                         return rc;
4486                                 goto redo;
4487                         }
4488
4489                         frame->grabstate = FRAME_UNUSED;
4490
4491                         /* Reset the hardware snapshot button */
4492                         /* FIXME - Is this the best place for this? */
4493                         if ((ov->snap_enabled) && (frame->snapshot)) {
4494                                 frame->snapshot = 0;
4495                                 ov51x_clear_snapshot(ov);
4496                         }
4497
4498                         /* Decompression, format conversion, etc... */
4499                         ov51x_postprocess(ov, frame);
4500
4501                         break;
4502                 } /* end switch */
4503
4504                 return 0;
4505         }
4506         case VIDIOCGFBUF:
4507         {
4508                 struct video_buffer *vb = arg;
4509
4510                 PDEBUG(4, "VIDIOCGFBUF");
4511
4512                 memset(vb, 0, sizeof(struct video_buffer));
4513
4514                 return 0;
4515         }
4516         case VIDIOCGUNIT:
4517         {
4518                 struct video_unit *vu = arg;
4519
4520                 PDEBUG(4, "VIDIOCGUNIT");
4521
4522                 memset(vu, 0, sizeof(struct video_unit));
4523
4524                 vu->video = ov->vdev->minor;
4525                 vu->vbi = VIDEO_NO_UNIT;
4526                 vu->radio = VIDEO_NO_UNIT;
4527                 vu->audio = VIDEO_NO_UNIT;
4528                 vu->teletext = VIDEO_NO_UNIT;
4529
4530                 return 0;
4531         }
4532         case OV511IOC_WI2C:
4533         {
4534                 struct ov511_i2c_struct *w = arg;
4535
4536                 return i2c_w_slave(ov, w->slave, w->reg, w->value, w->mask);
4537         }
4538         case OV511IOC_RI2C:
4539         {
4540                 struct ov511_i2c_struct *r = arg;
4541                 int rc;
4542
4543                 rc = i2c_r_slave(ov, r->slave, r->reg);
4544                 if (rc < 0)
4545                         return rc;
4546
4547                 r->value = rc;
4548                 return 0;
4549         }
4550         default:
4551                 PDEBUG(3, "Unsupported IOCtl: 0x%X", cmd);
4552                 return -ENOIOCTLCMD;
4553         } /* end switch */
4554
4555         return 0;
4556 }
4557
4558 static int
4559 ov51x_v4l1_ioctl(struct inode *inode, struct file *file,
4560                  unsigned int cmd, unsigned long arg)
4561 {
4562         struct video_device *vdev = file->private_data;
4563         struct usb_ov511 *ov = video_get_drvdata(vdev);
4564         int rc;
4565
4566         if (down_interruptible(&ov->lock))
4567                 return -EINTR;
4568
4569         rc = video_usercopy(inode, file, cmd, arg, ov51x_v4l1_ioctl_internal);
4570
4571         up(&ov->lock);
4572         return rc;
4573 }
4574
4575 static ssize_t
4576 ov51x_v4l1_read(struct file *file, char __user *buf, size_t cnt, loff_t *ppos)
4577 {
4578         struct video_device *vdev = file->private_data;
4579         int noblock = file->f_flags&O_NONBLOCK;
4580         unsigned long count = cnt;
4581         struct usb_ov511 *ov = video_get_drvdata(vdev);
4582         int i, rc = 0, frmx = -1;
4583         struct ov511_frame *frame;
4584
4585         if (down_interruptible(&ov->lock))
4586                 return -EINTR;
4587
4588         PDEBUG(4, "%ld bytes, noblock=%d", count, noblock);
4589
4590         if (!vdev || !buf) {
4591                 rc = -EFAULT;
4592                 goto error;
4593         }
4594
4595         if (!ov->dev) {
4596                 rc = -EIO;
4597                 goto error;
4598         }
4599
4600 // FIXME: Only supports two frames
4601         /* See if a frame is completed, then use it. */
4602         if (ov->frame[0].grabstate >= FRAME_DONE)       /* _DONE or _ERROR */
4603                 frmx = 0;
4604         else if (ov->frame[1].grabstate >= FRAME_DONE)/* _DONE or _ERROR */
4605                 frmx = 1;
4606
4607         /* If nonblocking we return immediately */
4608         if (noblock && (frmx == -1)) {
4609                 rc = -EAGAIN;
4610                 goto error;
4611         }
4612
4613         /* If no FRAME_DONE, look for a FRAME_GRABBING state. */
4614         /* See if a frame is in process (grabbing), then use it. */
4615         if (frmx == -1) {
4616                 if (ov->frame[0].grabstate == FRAME_GRABBING)
4617                         frmx = 0;
4618                 else if (ov->frame[1].grabstate == FRAME_GRABBING)
4619                         frmx = 1;
4620         }
4621
4622         /* If no frame is active, start one. */
4623         if (frmx == -1) {
4624                 if ((rc = ov51x_new_frame(ov, frmx = 0))) {
4625                         err("read: ov51x_new_frame error");
4626                         goto error;
4627                 }
4628         }
4629
4630         frame = &ov->frame[frmx];
4631
4632 restart:
4633         if (!ov->dev) {
4634                 rc = -EIO;
4635                 goto error;
4636         }
4637
4638         /* Wait while we're grabbing the image */
4639         PDEBUG(4, "Waiting image grabbing");
4640         rc = wait_event_interruptible(frame->wq,
4641                 (frame->grabstate == FRAME_DONE)
4642                 || (frame->grabstate == FRAME_ERROR));
4643
4644         if (rc)
4645                 goto error;
4646
4647         PDEBUG(4, "Got image, frame->grabstate = %d", frame->grabstate);
4648         PDEBUG(4, "bytes_recvd = %d", frame->bytes_recvd);
4649
4650         if (frame->grabstate == FRAME_ERROR) {
4651                 frame->bytes_read = 0;
4652                 err("** ick! ** Errored frame %d", ov->curframe);
4653                 if (ov51x_new_frame(ov, frmx)) {
4654                         err("read: ov51x_new_frame error");
4655                         goto error;
4656                 }
4657                 goto restart;
4658         }
4659
4660
4661         /* Repeat until we get a snapshot frame */
4662         if (ov->snap_enabled)
4663                 PDEBUG(4, "Waiting snapshot frame");
4664         if (ov->snap_enabled && !frame->snapshot) {
4665                 frame->bytes_read = 0;
4666                 if ((rc = ov51x_new_frame(ov, frmx))) {
4667                         err("read: ov51x_new_frame error");
4668                         goto error;
4669                 }
4670                 goto restart;
4671         }
4672
4673         /* Clear the snapshot */
4674         if (ov->snap_enabled && frame->snapshot) {
4675                 frame->snapshot = 0;
4676                 ov51x_clear_snapshot(ov);
4677         }
4678
4679         /* Decompression, format conversion, etc... */
4680         ov51x_postprocess(ov, frame);
4681
4682         PDEBUG(4, "frmx=%d, bytes_read=%ld, length=%ld", frmx,
4683                 frame->bytes_read,
4684                 get_frame_length(frame));
4685
4686         /* copy bytes to user space; we allow for partials reads */
4687 //      if ((count + frame->bytes_read)
4688 //          > get_frame_length((struct ov511_frame *)frame))
4689 //              count = frame->scanlength - frame->bytes_read;
4690
4691         /* FIXME - count hardwired to be one frame... */
4692         count = get_frame_length(frame);
4693
4694         PDEBUG(4, "Copy to user space: %ld bytes", count);
4695         if ((i = copy_to_user(buf, frame->data + frame->bytes_read, count))) {
4696                 PDEBUG(4, "Copy failed! %d bytes not copied", i);
4697                 rc = -EFAULT;
4698                 goto error;
4699         }
4700
4701         frame->bytes_read += count;
4702         PDEBUG(4, "{copy} count used=%ld, new bytes_read=%ld",
4703                 count, frame->bytes_read);
4704
4705         /* If all data have been read... */
4706         if (frame->bytes_read
4707             >= get_frame_length(frame)) {
4708                 frame->bytes_read = 0;
4709
4710 // FIXME: Only supports two frames
4711                 /* Mark it as available to be used again. */
4712                 ov->frame[frmx].grabstate = FRAME_UNUSED;
4713                 if ((rc = ov51x_new_frame(ov, !frmx))) {
4714                         err("ov51x_new_frame returned error");
4715                         goto error;
4716                 }
4717         }
4718
4719         PDEBUG(4, "read finished, returning %ld (sweet)", count);
4720
4721         up(&ov->lock);
4722         return count;
4723
4724 error:
4725         up(&ov->lock);
4726         return rc;
4727 }
4728
4729 static int
4730 ov51x_v4l1_mmap(struct file *file, struct vm_area_struct *vma)
4731 {
4732         struct video_device *vdev = file->private_data;
4733         unsigned long start = vma->vm_start;
4734         unsigned long size  = vma->vm_end - vma->vm_start;
4735         struct usb_ov511 *ov = video_get_drvdata(vdev);
4736         unsigned long page, pos;
4737
4738         if (ov->dev == NULL)
4739                 return -EIO;
4740
4741         PDEBUG(4, "mmap: %ld (%lX) bytes", size, size);
4742
4743         if (size > (((OV511_NUMFRAMES
4744                       * MAX_DATA_SIZE(ov->maxwidth, ov->maxheight)
4745                       + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1))))
4746                 return -EINVAL;
4747
4748         if (down_interruptible(&ov->lock))
4749                 return -EINTR;
4750
4751         pos = (unsigned long)ov->fbuf;
4752         while (size > 0) {
4753                 page = vmalloc_to_pfn((void *)pos);
4754                 if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) {
4755                         up(&ov->lock);
4756                         return -EAGAIN;
4757                 }
4758                 start += PAGE_SIZE;
4759                 pos += PAGE_SIZE;
4760                 if (size > PAGE_SIZE)
4761                         size -= PAGE_SIZE;
4762                 else
4763                         size = 0;
4764         }
4765
4766         up(&ov->lock);
4767         return 0;
4768 }
4769
4770 static struct file_operations ov511_fops = {
4771         .owner =        THIS_MODULE,
4772         .open =         ov51x_v4l1_open,
4773         .release =      ov51x_v4l1_close,
4774         .read =         ov51x_v4l1_read,
4775         .mmap =         ov51x_v4l1_mmap,
4776         .ioctl =        ov51x_v4l1_ioctl,
4777         .llseek =       no_llseek,
4778 };
4779
4780 static struct video_device vdev_template = {
4781         .owner =        THIS_MODULE,
4782         .name =         "OV511 USB Camera",
4783         .type =         VID_TYPE_CAPTURE,
4784         .hardware =     VID_HARDWARE_OV511,
4785         .fops =         &ov511_fops,
4786         .release =      video_device_release,
4787         .minor =        -1,
4788 };
4789
4790 /****************************************************************************
4791  *
4792  * OV511 and sensor configuration
4793  *
4794  ***************************************************************************/
4795
4796 /* This initializes the OV7610, OV7620, or OV76BE sensor. The OV76BE uses
4797  * the same register settings as the OV7610, since they are very similar.
4798  */
4799 static int
4800 ov7xx0_configure(struct usb_ov511 *ov)
4801 {
4802         int i, success;
4803         int rc;
4804
4805         /* Lawrence Glaister <lg@jfm.bc.ca> reports:
4806          *
4807          * Register 0x0f in the 7610 has the following effects:
4808          *
4809          * 0x85 (AEC method 1): Best overall, good contrast range
4810          * 0x45 (AEC method 2): Very overexposed
4811          * 0xa5 (spec sheet default): Ok, but the black level is
4812          *      shifted resulting in loss of contrast
4813          * 0x05 (old driver setting): very overexposed, too much
4814          *      contrast
4815          */
4816         static struct ov511_regvals aRegvalsNorm7610[] = {
4817                 { OV511_I2C_BUS, 0x10, 0xff },
4818                 { OV511_I2C_BUS, 0x16, 0x06 },
4819                 { OV511_I2C_BUS, 0x28, 0x24 },
4820                 { OV511_I2C_BUS, 0x2b, 0xac },
4821                 { OV511_I2C_BUS, 0x12, 0x00 },
4822                 { OV511_I2C_BUS, 0x38, 0x81 },
4823                 { OV511_I2C_BUS, 0x28, 0x24 },  /* 0c */
4824                 { OV511_I2C_BUS, 0x0f, 0x85 },  /* lg's setting */
4825                 { OV511_I2C_BUS, 0x15, 0x01 },
4826                 { OV511_I2C_BUS, 0x20, 0x1c },
4827                 { OV511_I2C_BUS, 0x23, 0x2a },
4828                 { OV511_I2C_BUS, 0x24, 0x10 },
4829                 { OV511_I2C_BUS, 0x25, 0x8a },
4830                 { OV511_I2C_BUS, 0x26, 0xa2 },
4831                 { OV511_I2C_BUS, 0x27, 0xc2 },
4832                 { OV511_I2C_BUS, 0x2a, 0x04 },
4833                 { OV511_I2C_BUS, 0x2c, 0xfe },
4834                 { OV511_I2C_BUS, 0x2d, 0x93 },
4835                 { OV511_I2C_BUS, 0x30, 0x71 },
4836                 { OV511_I2C_BUS, 0x31, 0x60 },
4837                 { OV511_I2C_BUS, 0x32, 0x26 },
4838                 { OV511_I2C_BUS, 0x33, 0x20 },
4839                 { OV511_I2C_BUS, 0x34, 0x48 },
4840                 { OV511_I2C_BUS, 0x12, 0x24 },
4841                 { OV511_I2C_BUS, 0x11, 0x01 },
4842                 { OV511_I2C_BUS, 0x0c, 0x24 },
4843                 { OV511_I2C_BUS, 0x0d, 0x24 },
4844                 { OV511_DONE_BUS, 0x0, 0x00 },
4845         };
4846
4847         static struct ov511_regvals aRegvalsNorm7620[] = {
4848                 { OV511_I2C_BUS, 0x00, 0x00 },
4849                 { OV511_I2C_BUS, 0x01, 0x80 },
4850                 { OV511_I2C_BUS, 0x02, 0x80 },
4851                 { OV511_I2C_BUS, 0x03, 0xc0 },
4852                 { OV511_I2C_BUS, 0x06, 0x60 },
4853                 { OV511_I2C_BUS, 0x07, 0x00 },
4854                 { OV511_I2C_BUS, 0x0c, 0x24 },
4855                 { OV511_I2C_BUS, 0x0c, 0x24 },
4856                 { OV511_I2C_BUS, 0x0d, 0x24 },
4857                 { OV511_I2C_BUS, 0x11, 0x01 },
4858                 { OV511_I2C_BUS, 0x12, 0x24 },
4859                 { OV511_I2C_BUS, 0x13, 0x01 },
4860                 { OV511_I2C_BUS, 0x14, 0x84 },
4861                 { OV511_I2C_BUS, 0x15, 0x01 },
4862                 { OV511_I2C_BUS, 0x16, 0x03 },
4863                 { OV511_I2C_BUS, 0x17, 0x2f },
4864                 { OV511_I2C_BUS, 0x18, 0xcf },
4865                 { OV511_I2C_BUS, 0x19, 0x06 },
4866                 { OV511_I2C_BUS, 0x1a, 0xf5 },
4867                 { OV511_I2C_BUS, 0x1b, 0x00 },
4868                 { OV511_I2C_BUS, 0x20, 0x18 },
4869                 { OV511_I2C_BUS, 0x21, 0x80 },
4870                 { OV511_I2C_BUS, 0x22, 0x80 },
4871                 { OV511_I2C_BUS, 0x23, 0x00 },
4872                 { OV511_I2C_BUS, 0x26, 0xa2 },
4873                 { OV511_I2C_BUS, 0x27, 0xea },
4874                 { OV511_I2C_BUS, 0x28, 0x20 },
4875                 { OV511_I2C_BUS, 0x29, 0x00 },
4876                 { OV511_I2C_BUS, 0x2a, 0x10 },
4877                 { OV511_I2C_BUS, 0x2b, 0x00 },
4878                 { OV511_I2C_BUS, 0x2c, 0x88 },
4879                 { OV511_I2C_BUS, 0x2d, 0x91 },
4880                 { OV511_I2C_BUS, 0x2e, 0x80 },
4881                 { OV511_I2C_BUS, 0x2f, 0x44 },
4882                 { OV511_I2C_BUS, 0x60, 0x27 },
4883                 { OV511_I2C_BUS, 0x61, 0x02 },
4884                 { OV511_I2C_BUS, 0x62, 0x5f },
4885                 { OV511_I2C_BUS, 0x63, 0xd5 },
4886                 { OV511_I2C_BUS, 0x64, 0x57 },
4887                 { OV511_I2C_BUS, 0x65, 0x83 },
4888                 { OV511_I2C_BUS, 0x66, 0x55 },
4889                 { OV511_I2C_BUS, 0x67, 0x92 },
4890                 { OV511_I2C_BUS, 0x68, 0xcf },
4891                 { OV511_I2C_BUS, 0x69, 0x76 },
4892                 { OV511_I2C_BUS, 0x6a, 0x22 },
4893                 { OV511_I2C_BUS, 0x6b, 0x00 },
4894                 { OV511_I2C_BUS, 0x6c, 0x02 },
4895                 { OV511_I2C_BUS, 0x6d, 0x44 },
4896                 { OV511_I2C_BUS, 0x6e, 0x80 },
4897                 { OV511_I2C_BUS, 0x6f, 0x1d },
4898                 { OV511_I2C_BUS, 0x70, 0x8b },
4899                 { OV511_I2C_BUS, 0x71, 0x00 },
4900                 { OV511_I2C_BUS, 0x72, 0x14 },
4901                 { OV511_I2C_BUS, 0x73, 0x54 },
4902                 { OV511_I2C_BUS, 0x74, 0x00 },
4903                 { OV511_I2C_BUS, 0x75, 0x8e },
4904                 { OV511_I2C_BUS, 0x76, 0x00 },
4905                 { OV511_I2C_BUS, 0x77, 0xff },
4906                 { OV511_I2C_BUS, 0x78, 0x80 },
4907                 { OV511_I2C_BUS, 0x79, 0x80 },
4908                 { OV511_I2C_BUS, 0x7a, 0x80 },
4909                 { OV511_I2C_BUS, 0x7b, 0xe2 },
4910                 { OV511_I2C_BUS, 0x7c, 0x00 },
4911                 { OV511_DONE_BUS, 0x0, 0x00 },
4912         };
4913
4914         PDEBUG(4, "starting configuration");
4915
4916         /* This looks redundant, but is necessary for WebCam 3 */
4917         ov->primary_i2c_slave = OV7xx0_SID;
4918         if (ov51x_set_slave_ids(ov, OV7xx0_SID) < 0)
4919                 return -1;
4920
4921         if (init_ov_sensor(ov) >= 0) {
4922                 PDEBUG(1, "OV7xx0 sensor initalized (method 1)");
4923         } else {
4924                 /* Reset the 76xx */
4925                 if (i2c_w(ov, 0x12, 0x80) < 0)
4926                         return -1;
4927
4928                 /* Wait for it to initialize */
4929                 msleep(150);
4930
4931                 i = 0;
4932                 success = 0;
4933                 while (i <= i2c_detect_tries) {
4934                         if ((i2c_r(ov, OV7610_REG_ID_HIGH) == 0x7F) &&
4935                             (i2c_r(ov, OV7610_REG_ID_LOW) == 0xA2)) {
4936                                 success = 1;
4937                                 break;
4938                         } else {
4939                                 i++;
4940                         }
4941                 }
4942
4943 // Was (i == i2c_detect_tries) previously. This obviously used to always report
4944 // success. Whether anyone actually depended on that bug is unknown
4945                 if ((i >= i2c_detect_tries) && (success == 0)) {
4946                         err("Failed to read sensor ID. You might not have an");
4947                         err("OV7610/20, or it may be not responding. Report");
4948                         err("this to " EMAIL);
4949                         err("This is only a warning. You can attempt to use");
4950                         err("your camera anyway");
4951 // Only issue a warning for now
4952 //                      return -1;
4953                 } else {
4954                         PDEBUG(1, "OV7xx0 initialized (method 2, %dx)", i+1);
4955                 }
4956         }
4957
4958         /* Detect sensor (sub)type */
4959         rc = i2c_r(ov, OV7610_REG_COM_I);
4960
4961         if (rc < 0) {
4962                 err("Error detecting sensor type");
4963                 return -1;
4964         } else if ((rc & 3) == 3) {
4965                 info("Sensor is an OV7610");
4966                 ov->sensor = SEN_OV7610;
4967         } else if ((rc & 3) == 1) {
4968                 /* I don't know what's different about the 76BE yet. */
4969                 if (i2c_r(ov, 0x15) & 1)
4970                         info("Sensor is an OV7620AE");
4971                 else
4972                         info("Sensor is an OV76BE");
4973
4974                 /* OV511+ will return all zero isoc data unless we
4975                  * configure the sensor as a 7620. Someone needs to
4976                  * find the exact reg. setting that causes this. */
4977                 if (ov->bridge == BRG_OV511PLUS) {
4978                         info("Enabling 511+/7620AE workaround");
4979                         ov->sensor = SEN_OV7620;
4980                 } else {
4981                         ov->sensor = SEN_OV76BE;
4982                 }
4983         } else if ((rc & 3) == 0) {
4984                 info("Sensor is an OV7620");
4985                 ov->sensor = SEN_OV7620;
4986         } else {
4987                 err("Unknown image sensor version: %d", rc & 3);
4988                 return -1;
4989         }
4990
4991         if (ov->sensor == SEN_OV7620) {
4992                 PDEBUG(4, "Writing 7620 registers");
4993                 if (write_regvals(ov, aRegvalsNorm7620))
4994                         return -1;
4995         } else {
4996                 PDEBUG(4, "Writing 7610 registers");
4997                 if (write_regvals(ov, aRegvalsNorm7610))
4998                         return -1;
4999         }
5000
5001         /* Set sensor-specific vars */
5002         ov->maxwidth = 640;
5003         ov->maxheight = 480;
5004         ov->minwidth = 64;
5005         ov->minheight = 48;
5006
5007         // FIXME: These do not match the actual settings yet
5008         ov->brightness = 0x80 << 8;
5009         ov->contrast = 0x80 << 8;
5010         ov->colour = 0x80 << 8;
5011         ov->hue = 0x80 << 8;
5012
5013         return 0;
5014 }
5015
5016 /* This initializes the OV6620, OV6630, OV6630AE, or OV6630AF sensor. */
5017 static int
5018 ov6xx0_configure(struct usb_ov511 *ov)
5019 {
5020         int rc;
5021
5022         static struct ov511_regvals aRegvalsNorm6x20[] = {
5023                 { OV511_I2C_BUS, 0x12, 0x80 }, /* reset */
5024                 { OV511_I2C_BUS, 0x11, 0x01 },
5025                 { OV511_I2C_BUS, 0x03, 0x60 },
5026                 { OV511_I2C_BUS, 0x05, 0x7f }, /* For when autoadjust is off */
5027                 { OV511_I2C_BUS, 0x07, 0xa8 },
5028                 /* The ratio of 0x0c and 0x0d  controls the white point */
5029                 { OV511_I2C_BUS, 0x0c, 0x24 },
5030                 { OV511_I2C_BUS, 0x0d, 0x24 },
5031                 { OV511_I2C_BUS, 0x0f, 0x15 }, /* COMS */
5032                 { OV511_I2C_BUS, 0x10, 0x75 }, /* AEC Exposure time */
5033                 { OV511_I2C_BUS, 0x12, 0x24 }, /* Enable AGC */
5034                 { OV511_I2C_BUS, 0x14, 0x04 },
5035                 /* 0x16: 0x06 helps frame stability with moving objects */
5036                 { OV511_I2C_BUS, 0x16, 0x06 },
5037 //              { OV511_I2C_BUS, 0x20, 0x30 }, /* Aperture correction enable */
5038                 { OV511_I2C_BUS, 0x26, 0xb2 }, /* BLC enable */
5039                 /* 0x28: 0x05 Selects RGB format if RGB on */
5040                 { OV511_I2C_BUS, 0x28, 0x05 },
5041                 { OV511_I2C_BUS, 0x2a, 0x04 }, /* Disable framerate adjust */
5042 //              { OV511_I2C_BUS, 0x2b, 0xac }, /* Framerate; Set 2a[7] first */
5043                 { OV511_I2C_BUS, 0x2d, 0x99 },
5044                 { OV511_I2C_BUS, 0x33, 0xa0 }, /* Color Processing Parameter */
5045                 { OV511_I2C_BUS, 0x34, 0xd2 }, /* Max A/D range */
5046                 { OV511_I2C_BUS, 0x38, 0x8b },
5047                 { OV511_I2C_BUS, 0x39, 0x40 },
5048
5049                 { OV511_I2C_BUS, 0x3c, 0x39 }, /* Enable AEC mode changing */
5050                 { OV511_I2C_BUS, 0x3c, 0x3c }, /* Change AEC mode */
5051                 { OV511_I2C_BUS, 0x3c, 0x24 }, /* Disable AEC mode changing */
5052
5053                 { OV511_I2C_BUS, 0x3d, 0x80 },
5054                 /* These next two registers (0x4a, 0x4b) are undocumented. They
5055                  * control the color balance */
5056                 { OV511_I2C_BUS, 0x4a, 0x80 },
5057                 { OV511_I2C_BUS, 0x4b, 0x80 },
5058                 { OV511_I2C_BUS, 0x4d, 0xd2 }, /* This reduces noise a bit */
5059                 { OV511_I2C_BUS, 0x4e, 0xc1 },
5060                 { OV511_I2C_BUS, 0x4f, 0x04 },
5061 // Do 50-53 have any effect?
5062 // Toggle 0x12[2] off and on here?
5063                 { OV511_DONE_BUS, 0x0, 0x00 },  /* END MARKER */
5064         };
5065
5066         static struct ov511_regvals aRegvalsNorm6x30[] = {
5067         /*OK*/  { OV511_I2C_BUS, 0x12, 0x80 }, /* reset */
5068                 { OV511_I2C_BUS, 0x11, 0x00 },
5069         /*OK*/  { OV511_I2C_BUS, 0x03, 0x60 },
5070         /*0A?*/ { OV511_I2C_BUS, 0x05, 0x7f }, /* For when autoadjust is off */
5071                 { OV511_I2C_BUS, 0x07, 0xa8 },
5072                 /* The ratio of 0x0c and 0x0d  controls the white point */
5073         /*OK*/  { OV511_I2C_BUS, 0x0c, 0x24 },
5074         /*OK*/  { OV511_I2C_BUS, 0x0d, 0x24 },
5075         /*A*/   { OV511_I2C_BUS, 0x0e, 0x20 },
5076 //      /*04?*/ { OV511_I2C_BUS, 0x14, 0x80 },
5077                 { OV511_I2C_BUS, 0x16, 0x03 },
5078 //      /*OK*/  { OV511_I2C_BUS, 0x20, 0x30 }, /* Aperture correction enable */
5079                 // 21 & 22? The suggested values look wrong. Go with default
5080         /*A*/   { OV511_I2C_BUS, 0x23, 0xc0 },
5081         /*A*/   { OV511_I2C_BUS, 0x25, 0x9a }, // Check this against default
5082 //      /*OK*/  { OV511_I2C_BUS, 0x26, 0xb2 }, /* BLC enable */
5083
5084                 /* 0x28: 0x05 Selects RGB format if RGB on */
5085 //      /*04?*/ { OV511_I2C_BUS, 0x28, 0x05 },
5086 //      /*04?*/ { OV511_I2C_BUS, 0x28, 0x45 }, // DEBUG: Tristate UV bus
5087
5088         /*OK*/  { OV511_I2C_BUS, 0x2a, 0x04 }, /* Disable framerate adjust */
5089 //      /*OK*/  { OV511_I2C_BUS, 0x2b, 0xac }, /* Framerate; Set 2a[7] first */
5090                 { OV511_I2C_BUS, 0x2d, 0x99 },
5091 //      /*A*/   { OV511_I2C_BUS, 0x33, 0x26 }, // Reserved bits on 6620
5092 //      /*d2?*/ { OV511_I2C_BUS, 0x34, 0x03 }, /* Max A/D range */
5093 //      /*8b?*/ { OV511_I2C_BUS, 0x38, 0x83 },
5094 //      /*40?*/ { OV511_I2C_BUS, 0x39, 0xc0 }, // 6630 adds bit 7
5095 //              { OV511_I2C_BUS, 0x3c, 0x39 }, /* Enable AEC mode changing */
5096 //              { OV511_I2C_BUS, 0x3c, 0x3c }, /* Change AEC mode */
5097 //              { OV511_I2C_BUS, 0x3c, 0x24 }, /* Disable AEC mode changing */
5098                 { OV511_I2C_BUS, 0x3d, 0x80 },
5099 //      /*A*/   { OV511_I2C_BUS, 0x3f, 0x0e },
5100
5101                 /* These next two registers (0x4a, 0x4b) are undocumented. They
5102                  * control the color balance */
5103 //      /*OK?*/ { OV511_I2C_BUS, 0x4a, 0x80 }, // Check these
5104 //      /*OK?*/ { OV511_I2C_BUS, 0x4b, 0x80 },
5105                 { OV511_I2C_BUS, 0x4d, 0x10 }, /* U = 0.563u, V = 0.714v */
5106         /*c1?*/ { OV511_I2C_BUS, 0x4e, 0x40 },
5107
5108                 /* UV average mode, color killer: strongest */
5109                 { OV511_I2C_BUS, 0x4f, 0x07 },
5110
5111                 { OV511_I2C_BUS, 0x54, 0x23 }, /* Max AGC gain: 18dB */
5112                 { OV511_I2C_BUS, 0x57, 0x81 }, /* (default) */
5113                 { OV511_I2C_BUS, 0x59, 0x01 }, /* AGC dark current comp: +1 */
5114                 { OV511_I2C_BUS, 0x5a, 0x2c }, /* (undocumented) */
5115                 { OV511_I2C_BUS, 0x5b, 0x0f }, /* AWB chrominance levels */
5116 //              { OV511_I2C_BUS, 0x5c, 0x10 },
5117                 { OV511_DONE_BUS, 0x0, 0x00 },  /* END MARKER */
5118         };
5119
5120         PDEBUG(4, "starting sensor configuration");
5121
5122         if (init_ov_sensor(ov) < 0) {
5123                 err("Failed to read sensor ID. You might not have an OV6xx0,");
5124                 err("or it may be not responding. Report this to " EMAIL);
5125                 return -1;
5126         } else {
5127                 PDEBUG(1, "OV6xx0 sensor detected");
5128         }
5129
5130         /* Detect sensor (sub)type */
5131         rc = i2c_r(ov, OV7610_REG_COM_I);
5132
5133         if (rc < 0) {
5134                 err("Error detecting sensor type");
5135                 return -1;
5136         }
5137
5138         if ((rc & 3) == 0) {
5139                 ov->sensor = SEN_OV6630;
5140                 info("Sensor is an OV6630");
5141         } else if ((rc & 3) == 1) {
5142                 ov->sensor = SEN_OV6620;
5143                 info("Sensor is an OV6620");
5144         } else if ((rc & 3) == 2) {
5145                 ov->sensor = SEN_OV6630;
5146                 info("Sensor is an OV6630AE");
5147         } else if ((rc & 3) == 3) {
5148                 ov->sensor = SEN_OV6630;
5149                 info("Sensor is an OV6630AF");
5150         }
5151
5152         /* Set sensor-specific vars */
5153         ov->maxwidth = 352;
5154         ov->maxheight = 288;
5155         ov->minwidth = 64;
5156         ov->minheight = 48;
5157
5158         // FIXME: These do not match the actual settings yet
5159         ov->brightness = 0x80 << 8;
5160         ov->contrast = 0x80 << 8;
5161         ov->colour = 0x80 << 8;
5162         ov->hue = 0x80 << 8;
5163
5164         if (ov->sensor == SEN_OV6620) {
5165                 PDEBUG(4, "Writing 6x20 registers");
5166                 if (write_regvals(ov, aRegvalsNorm6x20))
5167                         return -1;
5168         } else {
5169                 PDEBUG(4, "Writing 6x30 registers");
5170                 if (write_regvals(ov, aRegvalsNorm6x30))
5171                         return -1;
5172         }
5173
5174         return 0;
5175 }
5176
5177 /* This initializes the KS0127 and KS0127B video decoders. */
5178 static int
5179 ks0127_configure(struct usb_ov511 *ov)
5180 {
5181         int rc;
5182
5183 // FIXME: I don't know how to sync or reset it yet
5184 #if 0
5185         if (ov51x_init_ks_sensor(ov) < 0) {
5186                 err("Failed to initialize the KS0127");
5187                 return -1;
5188         } else {
5189                 PDEBUG(1, "KS012x(B) sensor detected");
5190         }
5191 #endif
5192
5193         /* Detect decoder subtype */
5194         rc = i2c_r(ov, 0x00);
5195         if (rc < 0) {
5196                 err("Error detecting sensor type");
5197                 return -1;
5198         } else if (rc & 0x08) {
5199                 rc = i2c_r(ov, 0x3d);
5200                 if (rc < 0) {
5201                         err("Error detecting sensor type");
5202                         return -1;
5203                 } else if ((rc & 0x0f) == 0) {
5204                         info("Sensor is a KS0127");
5205                         ov->sensor = SEN_KS0127;
5206                 } else if ((rc & 0x0f) == 9) {
5207                         info("Sensor is a KS0127B Rev. A");
5208                         ov->sensor = SEN_KS0127B;
5209                 }
5210         } else {
5211                 err("Error: Sensor is an unsupported KS0122");
5212                 return -1;
5213         }
5214
5215         /* Set sensor-specific vars */
5216         ov->maxwidth = 640;
5217         ov->maxheight = 480;
5218         ov->minwidth = 64;
5219         ov->minheight = 48;
5220
5221         // FIXME: These do not match the actual settings yet
5222         ov->brightness = 0x80 << 8;
5223         ov->contrast = 0x80 << 8;
5224         ov->colour = 0x80 << 8;
5225         ov->hue = 0x80 << 8;
5226
5227         /* This device is not supported yet. Bail out now... */
5228         err("This sensor is not supported yet.");
5229         return -1;
5230
5231         return 0;
5232 }
5233
5234 /* This initializes the SAA7111A video decoder. */
5235 static int
5236 saa7111a_configure(struct usb_ov511 *ov)
5237 {
5238         int rc;
5239
5240         /* Since there is no register reset command, all registers must be
5241          * written, otherwise gives erratic results */
5242         static struct ov511_regvals aRegvalsNormSAA7111A[] = {
5243                 { OV511_I2C_BUS, 0x06, 0xce },
5244                 { OV511_I2C_BUS, 0x07, 0x00 },
5245                 { OV511_I2C_BUS, 0x10, 0x44 }, /* YUV422, 240/286 lines */
5246                 { OV511_I2C_BUS, 0x0e, 0x01 }, /* NTSC M or PAL BGHI */
5247                 { OV511_I2C_BUS, 0x00, 0x00 },
5248                 { OV511_I2C_BUS, 0x01, 0x00 },
5249                 { OV511_I2C_BUS, 0x03, 0x23 },
5250                 { OV511_I2C_BUS, 0x04, 0x00 },
5251                 { OV511_I2C_BUS, 0x05, 0x00 },
5252                 { OV511_I2C_BUS, 0x08, 0xc8 }, /* Auto field freq */
5253                 { OV511_I2C_BUS, 0x09, 0x01 }, /* Chrom. trap off, APER=0.25 */
5254                 { OV511_I2C_BUS, 0x0a, 0x80 }, /* BRIG=128 */
5255                 { OV511_I2C_BUS, 0x0b, 0x40 }, /* CONT=1.0 */
5256                 { OV511_I2C_BUS, 0x0c, 0x40 }, /* SATN=1.0 */
5257                 { OV511_I2C_BUS, 0x0d, 0x00 }, /* HUE=0 */
5258                 { OV511_I2C_BUS, 0x0f, 0x00 },
5259                 { OV511_I2C_BUS, 0x11, 0x0c },
5260                 { OV511_I2C_BUS, 0x12, 0x00 },
5261                 { OV511_I2C_BUS, 0x13, 0x00 },
5262                 { OV511_I2C_BUS, 0x14, 0x00 },
5263                 { OV511_I2C_BUS, 0x15, 0x00 },
5264                 { OV511_I2C_BUS, 0x16, 0x00 },
5265                 { OV511_I2C_BUS, 0x17, 0x00 },
5266                 { OV511_I2C_BUS, 0x02, 0xc0 },  /* Composite input 0 */
5267                 { OV511_DONE_BUS, 0x0, 0x00 },
5268         };
5269
5270 // FIXME: I don't know how to sync or reset it yet
5271 #if 0
5272         if (ov51x_init_saa_sensor(ov) < 0) {
5273                 err("Failed to initialize the SAA7111A");
5274                 return -1;
5275         } else {
5276                 PDEBUG(1, "SAA7111A sensor detected");
5277         }
5278 #endif
5279
5280         /* 640x480 not supported with PAL */
5281         if (ov->pal) {
5282                 ov->maxwidth = 320;
5283                 ov->maxheight = 240;            /* Even field only */
5284         } else {
5285                 ov->maxwidth = 640;
5286                 ov->maxheight = 480;            /* Even/Odd fields */
5287         }
5288
5289         ov->minwidth = 320;
5290         ov->minheight = 240;            /* Even field only */
5291
5292         ov->has_decoder = 1;
5293         ov->num_inputs = 8;
5294         ov->norm = VIDEO_MODE_AUTO;
5295         ov->stop_during_set = 0;        /* Decoder guarantees stable image */
5296
5297         /* Decoder doesn't change these values, so we use these instead of
5298          * acutally reading the registers (which doesn't work) */
5299         ov->brightness = 0x80 << 8;
5300         ov->contrast = 0x40 << 9;
5301         ov->colour = 0x40 << 9;
5302         ov->hue = 32768;
5303
5304         PDEBUG(4, "Writing SAA7111A registers");
5305         if (write_regvals(ov, aRegvalsNormSAA7111A))
5306                 return -1;
5307
5308         /* Detect version of decoder. This must be done after writing the
5309          * initial regs or the decoder will lock up. */
5310         rc = i2c_r(ov, 0x00);
5311
5312         if (rc < 0) {
5313                 err("Error detecting sensor version");
5314                 return -1;
5315         } else {
5316                 info("Sensor is an SAA7111A (version 0x%x)", rc);
5317                 ov->sensor = SEN_SAA7111A;
5318         }
5319
5320         // FIXME: Fix this for OV518(+)
5321         /* Latch to negative edge of clock. Otherwise, we get incorrect
5322          * colors and jitter in the digital signal. */
5323         if (ov->bclass == BCL_OV511)
5324                 reg_w(ov, 0x11, 0x00);
5325         else
5326                 warn("SAA7111A not yet supported with OV518/OV518+");
5327
5328         return 0;
5329 }
5330
5331 /* This initializes the OV511/OV511+ and the sensor */
5332 static int
5333 ov511_configure(struct usb_ov511 *ov)
5334 {
5335         static struct ov511_regvals aRegvalsInit511[] = {
5336                 { OV511_REG_BUS, R51x_SYS_RESET,        0x7f },
5337                 { OV511_REG_BUS, R51x_SYS_INIT,         0x01 },
5338                 { OV511_REG_BUS, R51x_SYS_RESET,        0x7f },
5339                 { OV511_REG_BUS, R51x_SYS_INIT,         0x01 },
5340                 { OV511_REG_BUS, R51x_SYS_RESET,        0x3f },
5341                 { OV511_REG_BUS, R51x_SYS_INIT,         0x01 },
5342                 { OV511_REG_BUS, R51x_SYS_RESET,        0x3d },
5343                 { OV511_DONE_BUS, 0x0, 0x00},
5344         };
5345
5346         static struct ov511_regvals aRegvalsNorm511[] = {
5347                 { OV511_REG_BUS, R511_DRAM_FLOW_CTL,    0x01 },
5348                 { OV511_REG_BUS, R51x_SYS_SNAP,         0x00 },
5349                 { OV511_REG_BUS, R51x_SYS_SNAP,         0x02 },
5350                 { OV511_REG_BUS, R51x_SYS_SNAP,         0x00 },
5351                 { OV511_REG_BUS, R511_FIFO_OPTS,        0x1f },
5352                 { OV511_REG_BUS, R511_COMP_EN,          0x00 },
5353                 { OV511_REG_BUS, R511_COMP_LUT_EN,      0x03 },
5354                 { OV511_DONE_BUS, 0x0, 0x00 },
5355         };
5356
5357         static struct ov511_regvals aRegvalsNorm511Plus[] = {
5358                 { OV511_REG_BUS, R511_DRAM_FLOW_CTL,    0xff },
5359                 { OV511_REG_BUS, R51x_SYS_SNAP,         0x00 },
5360                 { OV511_REG_BUS, R51x_SYS_SNAP,         0x02 },
5361                 { OV511_REG_BUS, R51x_SYS_SNAP,         0x00 },
5362                 { OV511_REG_BUS, R511_FIFO_OPTS,        0xff },
5363                 { OV511_REG_BUS, R511_COMP_EN,          0x00 },
5364                 { OV511_REG_BUS, R511_COMP_LUT_EN,      0x03 },
5365                 { OV511_DONE_BUS, 0x0, 0x00 },
5366         };
5367
5368         PDEBUG(4, "");
5369
5370         ov->customid = reg_r(ov, R511_SYS_CUST_ID);
5371         if (ov->customid < 0) {
5372                 err("Unable to read camera bridge registers");
5373                 goto error;
5374         }
5375
5376         PDEBUG (1, "CustomID = %d", ov->customid);
5377         ov->desc = symbolic(camlist, ov->customid);
5378         info("model: %s", ov->desc);
5379
5380         if (0 == strcmp(ov->desc, NOT_DEFINED_STR)) {
5381                 err("Camera type (%d) not recognized", ov->customid);
5382                 err("Please notify " EMAIL " of the name,");
5383                 err("manufacturer, model, and this number of your camera.");
5384                 err("Also include the output of the detection process.");
5385         }
5386
5387         if (ov->customid == 70)         /* USB Life TV (PAL/SECAM) */
5388                 ov->pal = 1;
5389
5390         if (write_regvals(ov, aRegvalsInit511))
5391                 goto error;
5392
5393         if (ov->led_policy == LED_OFF || ov->led_policy == LED_AUTO)
5394                 ov51x_led_control(ov, 0);
5395
5396         /* The OV511+ has undocumented bits in the flow control register.
5397          * Setting it to 0xff fixes the corruption with moving objects. */
5398         if (ov->bridge == BRG_OV511) {
5399                 if (write_regvals(ov, aRegvalsNorm511))
5400                         goto error;
5401         } else if (ov->bridge == BRG_OV511PLUS) {
5402                 if (write_regvals(ov, aRegvalsNorm511Plus))
5403                         goto error;
5404         } else {
5405                 err("Invalid bridge");
5406         }
5407
5408         if (ov511_init_compression(ov))
5409                 goto error;
5410
5411         ov->packet_numbering = 1;
5412         ov511_set_packet_size(ov, 0);
5413
5414         ov->snap_enabled = snapshot;
5415
5416         /* Test for 7xx0 */
5417         PDEBUG(3, "Testing for 0V7xx0");
5418         ov->primary_i2c_slave = OV7xx0_SID;
5419         if (ov51x_set_slave_ids(ov, OV7xx0_SID) < 0)
5420                 goto error;
5421
5422         if (i2c_w(ov, 0x12, 0x80) < 0) {
5423                 /* Test for 6xx0 */
5424                 PDEBUG(3, "Testing for 0V6xx0");
5425                 ov->primary_i2c_slave = OV6xx0_SID;
5426                 if (ov51x_set_slave_ids(ov, OV6xx0_SID) < 0)
5427                         goto error;
5428
5429                 if (i2c_w(ov, 0x12, 0x80) < 0) {
5430                         /* Test for 8xx0 */
5431                         PDEBUG(3, "Testing for 0V8xx0");
5432                         ov->primary_i2c_slave = OV8xx0_SID;
5433                         if (ov51x_set_slave_ids(ov, OV8xx0_SID) < 0)
5434                                 goto error;
5435
5436                         if (i2c_w(ov, 0x12, 0x80) < 0) {
5437                                 /* Test for SAA7111A */
5438                                 PDEBUG(3, "Testing for SAA7111A");
5439                                 ov->primary_i2c_slave = SAA7111A_SID;
5440                                 if (ov51x_set_slave_ids(ov, SAA7111A_SID) < 0)
5441                                         goto error;
5442
5443                                 if (i2c_w(ov, 0x0d, 0x00) < 0) {
5444                                         /* Test for KS0127 */
5445                                         PDEBUG(3, "Testing for KS0127");
5446                                         ov->primary_i2c_slave = KS0127_SID;
5447                                         if (ov51x_set_slave_ids(ov, KS0127_SID) < 0)
5448                                                 goto error;
5449
5450                                         if (i2c_w(ov, 0x10, 0x00) < 0) {
5451                                                 err("Can't determine sensor slave IDs");
5452                                                 goto error;
5453                                         } else {
5454                                                 if (ks0127_configure(ov) < 0) {
5455                                                         err("Failed to configure KS0127");
5456                                                         goto error;
5457                                                 }
5458                                         }
5459                                 } else {
5460                                         if (saa7111a_configure(ov) < 0) {
5461                                                 err("Failed to configure SAA7111A");
5462                                                 goto error;
5463                                         }
5464                                 }
5465                         } else {
5466                                 err("Detected unsupported OV8xx0 sensor");
5467                                 goto error;
5468                         }
5469                 } else {
5470                         if (ov6xx0_configure(ov) < 0) {
5471                                 err("Failed to configure OV6xx0");
5472                                 goto error;
5473                         }
5474                 }
5475         } else {
5476                 if (ov7xx0_configure(ov) < 0) {
5477                         err("Failed to configure OV7xx0");
5478                         goto error;
5479                 }
5480         }
5481
5482         return 0;
5483
5484 error:
5485         err("OV511 Config failed");
5486
5487         return -EBUSY;
5488 }
5489
5490 /* This initializes the OV518/OV518+ and the sensor */
5491 static int
5492 ov518_configure(struct usb_ov511 *ov)
5493 {
5494         /* For 518 and 518+ */
5495         static struct ov511_regvals aRegvalsInit518[] = {
5496                 { OV511_REG_BUS, R51x_SYS_RESET,        0x40 },
5497                 { OV511_REG_BUS, R51x_SYS_INIT,         0xe1 },
5498                 { OV511_REG_BUS, R51x_SYS_RESET,        0x3e },
5499                 { OV511_REG_BUS, R51x_SYS_INIT,         0xe1 },
5500                 { OV511_REG_BUS, R51x_SYS_RESET,        0x00 },
5501                 { OV511_REG_BUS, R51x_SYS_INIT,         0xe1 },
5502                 { OV511_REG_BUS, 0x46,                  0x00 },
5503                 { OV511_REG_BUS, 0x5d,                  0x03 },
5504                 { OV511_DONE_BUS, 0x0, 0x00},
5505         };
5506
5507         static struct ov511_regvals aRegvalsNorm518[] = {
5508                 { OV511_REG_BUS, R51x_SYS_SNAP,         0x02 }, /* Reset */
5509                 { OV511_REG_BUS, R51x_SYS_SNAP,         0x01 }, /* Enable */
5510                 { OV511_REG_BUS, 0x31,                  0x0f },
5511                 { OV511_REG_BUS, 0x5d,                  0x03 },
5512                 { OV511_REG_BUS, 0x24,                  0x9f },
5513                 { OV511_REG_BUS, 0x25,                  0x90 },
5514                 { OV511_REG_BUS, 0x20,                  0x00 },
5515                 { OV511_REG_BUS, 0x51,                  0x04 },
5516                 { OV511_REG_BUS, 0x71,                  0x19 },
5517                 { OV511_DONE_BUS, 0x0, 0x00 },
5518         };
5519
5520         static struct ov511_regvals aRegvalsNorm518Plus[] = {
5521                 { OV511_REG_BUS, R51x_SYS_SNAP,         0x02 }, /* Reset */
5522                 { OV511_REG_BUS, R51x_SYS_SNAP,         0x01 }, /* Enable */
5523                 { OV511_REG_BUS, 0x31,                  0x0f },
5524                 { OV511_REG_BUS, 0x5d,                  0x03 },
5525                 { OV511_REG_BUS, 0x24,                  0x9f },
5526                 { OV511_REG_BUS, 0x25,                  0x90 },
5527                 { OV511_REG_BUS, 0x20,                  0x60 },
5528                 { OV511_REG_BUS, 0x51,                  0x02 },
5529                 { OV511_REG_BUS, 0x71,                  0x19 },
5530                 { OV511_REG_BUS, 0x40,                  0xff },
5531                 { OV511_REG_BUS, 0x41,                  0x42 },
5532                 { OV511_REG_BUS, 0x46,                  0x00 },
5533                 { OV511_REG_BUS, 0x33,                  0x04 },
5534                 { OV511_REG_BUS, 0x21,                  0x19 },
5535                 { OV511_REG_BUS, 0x3f,                  0x10 },
5536                 { OV511_DONE_BUS, 0x0, 0x00 },
5537         };
5538
5539         PDEBUG(4, "");
5540
5541         /* First 5 bits of custom ID reg are a revision ID on OV518 */
5542         info("Device revision %d", 0x1F & reg_r(ov, R511_SYS_CUST_ID));
5543
5544         /* Give it the default description */
5545         ov->desc = symbolic(camlist, 0);
5546
5547         if (write_regvals(ov, aRegvalsInit518))
5548                 goto error;
5549
5550         /* Set LED GPIO pin to output mode */
5551         if (reg_w_mask(ov, 0x57, 0x00, 0x02) < 0)
5552                 goto error;
5553
5554         /* LED is off by default with OV518; have to explicitly turn it on */
5555         if (ov->led_policy == LED_OFF || ov->led_policy == LED_AUTO)
5556                 ov51x_led_control(ov, 0);
5557         else
5558                 ov51x_led_control(ov, 1);
5559
5560         /* Don't require compression if dumppix is enabled; otherwise it's
5561          * required. OV518 has no uncompressed mode, to save RAM. */
5562         if (!dumppix && !ov->compress) {
5563                 ov->compress = 1;
5564                 warn("Compression required with OV518...enabling");
5565         }
5566
5567         if (ov->bridge == BRG_OV518) {
5568                 if (write_regvals(ov, aRegvalsNorm518))
5569                         goto error;
5570         } else if (ov->bridge == BRG_OV518PLUS) {
5571                 if (write_regvals(ov, aRegvalsNorm518Plus))
5572                         goto error;
5573         } else {
5574                 err("Invalid bridge");
5575         }
5576
5577         if (reg_w(ov, 0x2f, 0x80) < 0)
5578                 goto error;
5579
5580         if (ov518_init_compression(ov))
5581                 goto error;
5582
5583         if (ov->bridge == BRG_OV518)
5584         {
5585                 struct usb_interface *ifp;
5586                 struct usb_host_interface *alt;
5587                 __u16 mxps = 0;
5588
5589                 ifp = usb_ifnum_to_if(ov->dev, 0);
5590                 if (ifp) {
5591                         alt = usb_altnum_to_altsetting(ifp, 7);
5592                         if (alt)
5593                                 mxps = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);
5594                 }
5595
5596                 /* Some OV518s have packet numbering by default, some don't */
5597                 if (mxps == 897)
5598                         ov->packet_numbering = 1;
5599                 else
5600                         ov->packet_numbering = 0;
5601         } else {
5602                 /* OV518+ has packet numbering turned on by default */
5603                 ov->packet_numbering = 1;
5604         }
5605
5606         ov518_set_packet_size(ov, 0);
5607
5608         ov->snap_enabled = snapshot;
5609
5610         /* Test for 76xx */
5611         ov->primary_i2c_slave = OV7xx0_SID;
5612         if (ov51x_set_slave_ids(ov, OV7xx0_SID) < 0)
5613                 goto error;
5614
5615         /* The OV518 must be more aggressive about sensor detection since
5616          * I2C write will never fail if the sensor is not present. We have
5617          * to try to initialize the sensor to detect its presence */
5618
5619         if (init_ov_sensor(ov) < 0) {
5620                 /* Test for 6xx0 */
5621                 ov->primary_i2c_slave = OV6xx0_SID;
5622                 if (ov51x_set_slave_ids(ov, OV6xx0_SID) < 0)
5623                         goto error;
5624
5625                 if (init_ov_sensor(ov) < 0) {
5626                         /* Test for 8xx0 */
5627                         ov->primary_i2c_slave = OV8xx0_SID;
5628                         if (ov51x_set_slave_ids(ov, OV8xx0_SID) < 0)
5629                                 goto error;
5630
5631                         if (init_ov_sensor(ov) < 0) {
5632                                 err("Can't determine sensor slave IDs");
5633                                 goto error;
5634                         } else {
5635                                 err("Detected unsupported OV8xx0 sensor");
5636                                 goto error;
5637                         }
5638                 } else {
5639                         if (ov6xx0_configure(ov) < 0) {
5640                                 err("Failed to configure OV6xx0");
5641                                 goto error;
5642                         }
5643                 }
5644         } else {
5645                 if (ov7xx0_configure(ov) < 0) {
5646                         err("Failed to configure OV7xx0");
5647                         goto error;
5648                 }
5649         }
5650
5651         ov->maxwidth = 352;
5652         ov->maxheight = 288;
5653
5654         // The OV518 cannot go as low as the sensor can
5655         ov->minwidth = 160;
5656         ov->minheight = 120;
5657
5658         return 0;
5659
5660 error:
5661         err("OV518 Config failed");
5662
5663         return -EBUSY;
5664 }
5665
5666 /****************************************************************************
5667  *  sysfs
5668  ***************************************************************************/
5669
5670 static inline struct usb_ov511 *cd_to_ov(struct class_device *cd)
5671 {
5672         struct video_device *vdev = to_video_device(cd);
5673         return video_get_drvdata(vdev);
5674 }
5675
5676 static ssize_t show_custom_id(struct class_device *cd, char *buf)
5677 {
5678         struct usb_ov511 *ov = cd_to_ov(cd);
5679         return sprintf(buf, "%d\n", ov->customid);
5680 }
5681 static CLASS_DEVICE_ATTR(custom_id, S_IRUGO, show_custom_id, NULL);
5682
5683 static ssize_t show_model(struct class_device *cd, char *buf)
5684 {
5685         struct usb_ov511 *ov = cd_to_ov(cd);
5686         return sprintf(buf, "%s\n", ov->desc);
5687 }
5688 static CLASS_DEVICE_ATTR(model, S_IRUGO, show_model, NULL);
5689
5690 static ssize_t show_bridge(struct class_device *cd, char *buf)
5691 {
5692         struct usb_ov511 *ov = cd_to_ov(cd);
5693         return sprintf(buf, "%s\n", symbolic(brglist, ov->bridge));
5694 }
5695 static CLASS_DEVICE_ATTR(bridge, S_IRUGO, show_bridge, NULL);
5696
5697 static ssize_t show_sensor(struct class_device *cd, char *buf)
5698 {
5699         struct usb_ov511 *ov = cd_to_ov(cd);
5700         return sprintf(buf, "%s\n", symbolic(senlist, ov->sensor));
5701 }
5702 static CLASS_DEVICE_ATTR(sensor, S_IRUGO, show_sensor, NULL);
5703
5704 static ssize_t show_brightness(struct class_device *cd, char *buf)
5705 {
5706         struct usb_ov511 *ov = cd_to_ov(cd);
5707         unsigned short x;
5708
5709         if (!ov->dev)
5710                 return -ENODEV;
5711         sensor_get_brightness(ov, &x);
5712         return sprintf(buf, "%d\n", x >> 8);
5713 }
5714 static CLASS_DEVICE_ATTR(brightness, S_IRUGO, show_brightness, NULL);
5715
5716 static ssize_t show_saturation(struct class_device *cd, char *buf)
5717 {
5718         struct usb_ov511 *ov = cd_to_ov(cd);
5719         unsigned short x;
5720
5721         if (!ov->dev)
5722                 return -ENODEV;
5723         sensor_get_saturation(ov, &x);
5724         return sprintf(buf, "%d\n", x >> 8);
5725 }
5726 static CLASS_DEVICE_ATTR(saturation, S_IRUGO, show_saturation, NULL);
5727
5728 static ssize_t show_contrast(struct class_device *cd, char *buf)
5729 {
5730         struct usb_ov511 *ov = cd_to_ov(cd);
5731         unsigned short x;
5732
5733         if (!ov->dev)
5734                 return -ENODEV;
5735         sensor_get_contrast(ov, &x);
5736         return sprintf(buf, "%d\n", x >> 8);
5737 }
5738 static CLASS_DEVICE_ATTR(contrast, S_IRUGO, show_contrast, NULL);
5739
5740 static ssize_t show_hue(struct class_device *cd, char *buf)
5741 {
5742         struct usb_ov511 *ov = cd_to_ov(cd);
5743         unsigned short x;
5744
5745         if (!ov->dev)
5746                 return -ENODEV;
5747         sensor_get_hue(ov, &x);
5748         return sprintf(buf, "%d\n", x >> 8);
5749 }
5750 static CLASS_DEVICE_ATTR(hue, S_IRUGO, show_hue, NULL);
5751
5752 static ssize_t show_exposure(struct class_device *cd, char *buf)
5753 {
5754         struct usb_ov511 *ov = cd_to_ov(cd);
5755         unsigned char exp;
5756
5757         if (!ov->dev)
5758                 return -ENODEV;
5759         sensor_get_exposure(ov, &exp);
5760         return sprintf(buf, "%d\n", exp >> 8);
5761 }
5762 static CLASS_DEVICE_ATTR(exposure, S_IRUGO, show_exposure, NULL);
5763
5764 static void ov_create_sysfs(struct video_device *vdev)
5765 {
5766         video_device_create_file(vdev, &class_device_attr_custom_id);
5767         video_device_create_file(vdev, &class_device_attr_model);
5768         video_device_create_file(vdev, &class_device_attr_bridge);
5769         video_device_create_file(vdev, &class_device_attr_sensor);
5770         video_device_create_file(vdev, &class_device_attr_brightness);
5771         video_device_create_file(vdev, &class_device_attr_saturation);
5772         video_device_create_file(vdev, &class_device_attr_contrast);
5773         video_device_create_file(vdev, &class_device_attr_hue);
5774         video_device_create_file(vdev, &class_device_attr_exposure);
5775 }
5776
5777 /****************************************************************************
5778  *  USB routines
5779  ***************************************************************************/
5780
5781 static int
5782 ov51x_probe(struct usb_interface *intf, const struct usb_device_id *id)
5783 {
5784         struct usb_device *dev = interface_to_usbdev(intf);
5785         struct usb_interface_descriptor *idesc;
5786         struct usb_ov511 *ov;
5787         int i;
5788
5789         PDEBUG(1, "probing for device...");
5790
5791         /* We don't handle multi-config cameras */
5792         if (dev->descriptor.bNumConfigurations != 1)
5793                 return -ENODEV;
5794
5795         idesc = &intf->cur_altsetting->desc;
5796
5797         if (idesc->bInterfaceClass != 0xFF)
5798                 return -ENODEV;
5799         if (idesc->bInterfaceSubClass != 0x00)
5800                 return -ENODEV;
5801
5802         if ((ov = kmalloc(sizeof(*ov), GFP_KERNEL)) == NULL) {
5803                 err("couldn't kmalloc ov struct");
5804                 goto error_out;
5805         }
5806
5807         memset(ov, 0, sizeof(*ov));
5808
5809         ov->dev = dev;
5810         ov->iface = idesc->bInterfaceNumber;
5811         ov->led_policy = led;
5812         ov->compress = compress;
5813         ov->lightfreq = lightfreq;
5814         ov->num_inputs = 1;        /* Video decoder init functs. change this */
5815         ov->stop_during_set = !fastset;
5816         ov->backlight = backlight;
5817         ov->mirror = mirror;
5818         ov->auto_brt = autobright;
5819         ov->auto_gain = autogain;
5820         ov->auto_exp = autoexp;
5821
5822         switch (le16_to_cpu(dev->descriptor.idProduct)) {
5823         case PROD_OV511:
5824                 ov->bridge = BRG_OV511;
5825                 ov->bclass = BCL_OV511;
5826                 break;
5827         case PROD_OV511PLUS:
5828                 ov->bridge = BRG_OV511PLUS;
5829                 ov->bclass = BCL_OV511;
5830                 break;
5831         case PROD_OV518:
5832                 ov->bridge = BRG_OV518;
5833                 ov->bclass = BCL_OV518;
5834                 break;
5835         case PROD_OV518PLUS:
5836                 ov->bridge = BRG_OV518PLUS;
5837                 ov->bclass = BCL_OV518;
5838                 break;
5839         case PROD_ME2CAM:
5840                 if (le16_to_cpu(dev->descriptor.idVendor) != VEND_MATTEL)
5841                         goto error;
5842                 ov->bridge = BRG_OV511PLUS;
5843                 ov->bclass = BCL_OV511;
5844                 break;
5845         default:
5846                 err("Unknown product ID 0x%04x", le16_to_cpu(dev->descriptor.idProduct));
5847                 goto error;
5848         }
5849
5850         info("USB %s video device found", symbolic(brglist, ov->bridge));
5851
5852         init_waitqueue_head(&ov->wq);
5853
5854         init_MUTEX(&ov->lock);  /* to 1 == available */
5855         init_MUTEX(&ov->buf_lock);
5856         init_MUTEX(&ov->param_lock);
5857         init_MUTEX(&ov->i2c_lock);
5858         init_MUTEX(&ov->cbuf_lock);
5859
5860         ov->buf_state = BUF_NOT_ALLOCATED;
5861
5862         if (usb_make_path(dev, ov->usb_path, OV511_USB_PATH_LEN) < 0) {
5863                 err("usb_make_path error");
5864                 goto error;
5865         }
5866
5867         /* Allocate control transfer buffer. */
5868         /* Must be kmalloc()'ed, for DMA compatibility */
5869         ov->cbuf = kmalloc(OV511_CBUF_SIZE, GFP_KERNEL);
5870         if (!ov->cbuf)
5871                 goto error;
5872
5873         if (ov->bclass == BCL_OV518) {
5874                 if (ov518_configure(ov) < 0)
5875                         goto error;
5876         } else {
5877                 if (ov511_configure(ov) < 0)
5878                         goto error;
5879         }
5880
5881         for (i = 0; i < OV511_NUMFRAMES; i++) {
5882                 ov->frame[i].framenum = i;
5883                 init_waitqueue_head(&ov->frame[i].wq);
5884         }
5885
5886         for (i = 0; i < OV511_NUMSBUF; i++) {
5887                 ov->sbuf[i].ov = ov;
5888                 spin_lock_init(&ov->sbuf[i].lock);
5889                 ov->sbuf[i].n = i;
5890         }
5891
5892         /* Unnecessary? (This is done on open(). Need to make sure variables
5893          * are properly initialized without this before removing it, though). */
5894         if (ov51x_set_default_params(ov) < 0)
5895                 goto error;
5896
5897 #ifdef OV511_DEBUG
5898         if (dump_bridge) {
5899                 if (ov->bclass == BCL_OV511)
5900                         ov511_dump_regs(ov);
5901                 else
5902                         ov518_dump_regs(ov);
5903         }
5904 #endif
5905
5906         ov->vdev = video_device_alloc();
5907         if (!ov->vdev)
5908                 goto error;
5909
5910         memcpy(ov->vdev, &vdev_template, sizeof(*ov->vdev));
5911         ov->vdev->dev = &dev->dev;
5912         video_set_drvdata(ov->vdev, ov);
5913
5914         for (i = 0; i < OV511_MAX_UNIT_VIDEO; i++) {
5915                 /* Minor 0 cannot be specified; assume user wants autodetect */
5916                 if (unit_video[i] == 0)
5917                         break;
5918
5919                 if (video_register_device(ov->vdev, VFL_TYPE_GRABBER,
5920                         unit_video[i]) >= 0) {
5921                         break;
5922                 }
5923         }
5924
5925         /* Use the next available one */
5926         if ((ov->vdev->minor == -1) &&
5927             video_register_device(ov->vdev, VFL_TYPE_GRABBER, -1) < 0) {
5928                 err("video_register_device failed");
5929                 goto error;
5930         }
5931
5932         info("Device at %s registered to minor %d", ov->usb_path,
5933              ov->vdev->minor);
5934
5935         usb_set_intfdata(intf, ov);
5936         ov_create_sysfs(ov->vdev);
5937         return 0;
5938
5939 error:
5940         if (ov->vdev) {
5941                 if (-1 == ov->vdev->minor)
5942                         video_device_release(ov->vdev);
5943                 else
5944                         video_unregister_device(ov->vdev);
5945                 ov->vdev = NULL;
5946         }
5947
5948         if (ov->cbuf) {
5949                 down(&ov->cbuf_lock);
5950                 kfree(ov->cbuf);
5951                 ov->cbuf = NULL;
5952                 up(&ov->cbuf_lock);
5953         }
5954
5955         kfree(ov);
5956         ov = NULL;
5957
5958 error_out:
5959         err("Camera initialization failed");
5960         return -EIO;
5961 }
5962
5963 static void
5964 ov51x_disconnect(struct usb_interface *intf)
5965 {
5966         struct usb_ov511 *ov = usb_get_intfdata(intf);
5967         int n;
5968
5969         PDEBUG(3, "");
5970
5971         usb_set_intfdata (intf, NULL);
5972
5973         if (!ov)
5974                 return;
5975
5976         if (ov->vdev)
5977                 video_unregister_device(ov->vdev);
5978
5979         for (n = 0; n < OV511_NUMFRAMES; n++)
5980                 ov->frame[n].grabstate = FRAME_ERROR;
5981
5982         ov->curframe = -1;
5983
5984         /* This will cause the process to request another frame */
5985         for (n = 0; n < OV511_NUMFRAMES; n++)
5986                 wake_up_interruptible(&ov->frame[n].wq);
5987
5988         wake_up_interruptible(&ov->wq);
5989
5990         ov->streaming = 0;
5991         ov51x_unlink_isoc(ov);
5992
5993         ov->dev = NULL;
5994
5995         /* Free the memory */
5996         if (ov && !ov->user) {
5997                 down(&ov->cbuf_lock);
5998                 kfree(ov->cbuf);
5999                 ov->cbuf = NULL;
6000                 up(&ov->cbuf_lock);
6001
6002                 ov51x_dealloc(ov);
6003                 kfree(ov);
6004                 ov = NULL;
6005         }
6006
6007         PDEBUG(3, "Disconnect complete");
6008 }
6009
6010 static struct usb_driver ov511_driver = {
6011         .owner =        THIS_MODULE,
6012         .name =         "ov511",
6013         .id_table =     device_table,
6014         .probe =        ov51x_probe,
6015         .disconnect =   ov51x_disconnect
6016 };
6017
6018 /****************************************************************************
6019  *
6020  *  Module routines
6021  *
6022  ***************************************************************************/
6023
6024 /* Returns 0 for success */
6025 int
6026 ov511_register_decomp_module(int ver, struct ov51x_decomp_ops *ops, int ov518,
6027                              int mmx)
6028 {
6029         if (ver != DECOMP_INTERFACE_VER) {
6030                 err("Decompression module has incompatible");
6031                 err("interface version %d", ver);
6032                 err("Interface version %d is required", DECOMP_INTERFACE_VER);
6033                 return -EINVAL;
6034         }
6035
6036         if (!ops)
6037                 return -EFAULT;
6038
6039         if (mmx && !ov51x_mmx_available) {
6040                 err("MMX not available on this system or kernel");
6041                 return -EINVAL;
6042         }
6043
6044         lock_kernel();
6045
6046         if (ov518) {
6047                 if (mmx) {
6048                         if (ov518_mmx_decomp_ops)
6049                                 goto err_in_use;
6050                         else
6051                                 ov518_mmx_decomp_ops = ops;
6052                 } else {
6053                         if (ov518_decomp_ops)
6054                                 goto err_in_use;
6055                         else
6056                                 ov518_decomp_ops = ops;
6057                 }
6058         } else {
6059                 if (mmx) {
6060                         if (ov511_mmx_decomp_ops)
6061                                 goto err_in_use;
6062                         else
6063                                 ov511_mmx_decomp_ops = ops;
6064                 } else {
6065                         if (ov511_decomp_ops)
6066                                 goto err_in_use;
6067                         else
6068                                 ov511_decomp_ops = ops;
6069                 }
6070         }
6071
6072         unlock_kernel();
6073         return 0;
6074
6075 err_in_use:
6076         unlock_kernel();
6077         return -EBUSY;
6078 }
6079
6080 void
6081 ov511_deregister_decomp_module(int ov518, int mmx)
6082 {
6083         lock_kernel();
6084
6085         if (ov518) {
6086                 if (mmx)
6087                         ov518_mmx_decomp_ops = NULL;
6088                 else
6089                         ov518_decomp_ops = NULL;
6090         } else {
6091                 if (mmx)
6092                         ov511_mmx_decomp_ops = NULL;
6093                 else
6094                         ov511_decomp_ops = NULL;
6095         }
6096
6097         unlock_kernel();
6098 }
6099
6100 static int __init
6101 usb_ov511_init(void)
6102 {
6103         int retval;
6104
6105         retval = usb_register(&ov511_driver);
6106         if (retval)
6107                 goto out;
6108
6109         info(DRIVER_VERSION " : " DRIVER_DESC);
6110
6111 out:
6112         return retval;
6113 }
6114
6115 static void __exit
6116 usb_ov511_exit(void)
6117 {
6118         usb_deregister(&ov511_driver);
6119         info("driver deregistered");
6120
6121 }
6122
6123 module_init(usb_ov511_init);
6124 module_exit(usb_ov511_exit);
6125
6126 EXPORT_SYMBOL(ov511_register_decomp_module);
6127 EXPORT_SYMBOL(ov511_deregister_decomp_module);