drivers/media/video/zoran_device.c

   1 /*
   2  * Zoran zr36057/zr36067 PCI controller driver, for the
   3  * Pinnacle/Miro DC10/DC10+/DC30/DC30+, Iomega Buz, Linux
   4  * Media Labs LML33/LML33R10.
   5  *
   6  * This part handles device access (PCI/I2C/codec/...)
   7  *
   8  * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
   9  *
  10  * Currently maintained by:
  11  *   Ronald Bultje    <rbultje@ronald.bitfreak.net>
  12  *   Laurent Pinchart <laurent.pinchart@skynet.be>
  13  *   Mailinglist      <mjpeg-users@lists.sf.net>
  14  *
  15  * This program is free software; you can redistribute it and/or modify
  16  * it under the terms of the GNU General Public License as published by
  17  * the Free Software Foundation; either version 2 of the License, or
  18  * (at your option) any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  * GNU General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License
  26  * along with this program; if not, write to the Free Software
  27  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  28  */
  29
  30 #include <linux/types.h>
  31 #include <linux/kernel.h>
  32 #include <linux/module.h>
  33 #include <linux/vmalloc.h>
  34 #include <linux/byteorder/generic.h>
  35
  36 #include <linux/interrupt.h>
  37 #include <linux/proc_fs.h>
  38 #include <linux/i2c.h>
  39 #include <linux/i2c-algo-bit.h>
  40 #include <linux/videodev.h>
  41 #include <linux/spinlock.h>
  42 #include <linux/sem.h>
  43
  44 #include <linux/pci.h>
  45 #include <linux/video_decoder.h>
  46 #include <linux/video_encoder.h>
  47 #include <linux/delay.h>
  48 #include <linux/wait.h>
  49
  50 #include <asm/io.h>
  51
  52 #include "videocodec.h"
  53 #include "zoran.h"
  54 #include "zoran_device.h"
  55
  56 #define IRQ_MASK ( ZR36057_ISR_GIRQ0 | \
  57                    ZR36057_ISR_GIRQ1 | \
  58                    ZR36057_ISR_JPEGRepIRQ )
  59
  60 extern const struct zoran_format zoran_formats[];
  61
  62 extern int *zr_debug;
  63
  64 #define dprintk(num, format, args...) \
  65         do { \
  66                 if (*zr_debug >= num) \
  67                         printk(format, ##args); \
  68         } while (0)
  69
  70 static int lml33dpath = 0;      /* 1 will use digital path in capture
  71                                  * mode instead of analog. It can be
  72                                  * used for picture adjustments using
  73                                  * tool like xawtv while watching image
  74                                  * on TV monitor connected to the output.
  75                                  * However, due to absence of 75 Ohm
  76                                  * load on Bt819 input, there will be
  77                                  * some image imperfections */
  78
  79 module_param(lml33dpath, bool, 0);
  80 MODULE_PARM_DESC(lml33dpath,
  81                  "Use digital path capture mode (on LML33 cards)");
  82
  83 static void
  84 zr36057_init_vfe (struct zoran *zr);
  85
  86 /*
  87  * General Purpose I/O and Guest bus access
  88  */
  89
  90 /*
  91  * This is a bit tricky. When a board lacks a GPIO function, the corresponding
  92  * GPIO bit number in the card_info structure is set to 0.
  93  */
  94
  95 void
  96 GPIO (struct zoran *zr,
  97       int           bit,
  98       unsigned int  value)
  99 {
 100         u32 reg;
 101         u32 mask;
 102
 103         /* Make sure the bit number is legal
 104          * A bit number of -1 (lacking) gives a mask of 0,
 105          * making it harmless */
 106         mask = (1 << (24 + bit)) & 0xff000000;
 107         reg = btread(ZR36057_GPPGCR1) & ~mask;
 108         if (value) {
 109                 reg |= mask;
 110         }
 111         btwrite(reg, ZR36057_GPPGCR1);
 112         udelay(1);
 113 }
 114
 115 /*
 116  * Wait til post office is no longer busy
 117  */
 118
 119 int
 120 post_office_wait (struct zoran *zr)
 121 {
 122         u32 por;
 123
 124 //      while (((por = btread(ZR36057_POR)) & (ZR36057_POR_POPen | ZR36057_POR_POTime)) == ZR36057_POR_POPen) {
 125         while ((por = btread(ZR36057_POR)) & ZR36057_POR_POPen) {
 126                 /* wait for something to happen */
 127         }
 128         if ((por & ZR36057_POR_POTime) && !zr->card.gws_not_connected) {
 129                 /* In LML33/BUZ \GWS line is not connected, so it has always timeout set */
 130                 dprintk(1, KERN_INFO "%s: pop timeout %08x\n", ZR_DEVNAME(zr),
 131                         por);
 132                 return -1;
 133         }
 134
 135         return 0;
 136 }
 137
 138 int
 139 post_office_write (struct zoran *zr,
 140                    unsigned int  guest,
 141                    unsigned int  reg,
 142                    unsigned int  value)
 143 {
 144         u32 por;
 145
 146         por =
 147             ZR36057_POR_PODir | ZR36057_POR_POTime | ((guest & 7) << 20) |
 148             ((reg & 7) << 16) | (value & 0xFF);
 149         btwrite(por, ZR36057_POR);
 150
 151         return post_office_wait(zr);
 152 }
 153
 154 int
 155 post_office_read (struct zoran *zr,
 156                   unsigned int  guest,
 157                   unsigned int  reg)
 158 {
 159         u32 por;
 160
 161         por = ZR36057_POR_POTime | ((guest & 7) << 20) | ((reg & 7) << 16);
 162         btwrite(por, ZR36057_POR);
 163         if (post_office_wait(zr) < 0) {
 164                 return -1;
 165         }
 166
 167         return btread(ZR36057_POR) & 0xFF;
 168 }
 169
 170 /*
 171  * detect guests
 172  */
 173
 174 static void
 175 dump_guests (struct zoran *zr)
 176 {
 177         if (*zr_debug > 2) {
 178                 int i, guest[8];
 179
 180                 for (i = 1; i < 8; i++) {       // Don't read jpeg codec here
 181                         guest[i] = post_office_read(zr, i, 0);
 182                 }
 183
 184                 printk(KERN_INFO "%s: Guests:", ZR_DEVNAME(zr));
 185
 186                 for (i = 1; i < 8; i++) {
 187                         printk(" 0x%02x", guest[i]);
 188                 }
 189                 printk("\n");
 190         }
 191 }
 192
 193 static inline unsigned long
 194 get_time (void)
 195 {
 196         struct timeval tv;
 197
 198         do_gettimeofday(&tv);
 199         return (1000000 * tv.tv_sec + tv.tv_usec);
 200 }
 201
 202 void
 203 detect_guest_activity (struct zoran *zr)
 204 {
 205         int timeout, i, j, res, guest[8], guest0[8], change[8][3];
 206         unsigned long t0, t1;
 207
 208         dump_guests(zr);
 209         printk(KERN_INFO "%s: Detecting guests activity, please wait...\n",
 210                ZR_DEVNAME(zr));
 211         for (i = 1; i < 8; i++) {       // Don't read jpeg codec here
 212                 guest0[i] = guest[i] = post_office_read(zr, i, 0);
 213         }
 214
 215         timeout = 0;
 216         j = 0;
 217         t0 = get_time();
 218         while (timeout < 10000) {
 219                 udelay(10);
 220                 timeout++;
 221                 for (i = 1; (i < 8) && (j < 8); i++) {
 222                         res = post_office_read(zr, i, 0);
 223                         if (res != guest[i]) {
 224                                 t1 = get_time();
 225                                 change[j][0] = (t1 - t0);
 226                                 t0 = t1;
 227                                 change[j][1] = i;
 228                                 change[j][2] = res;
 229                                 j++;
 230                                 guest[i] = res;
 231                         }
 232                 }
 233                 if (j >= 8)
 234                         break;
 235         }
 236         printk(KERN_INFO "%s: Guests:", ZR_DEVNAME(zr));
 237
 238         for (i = 1; i < 8; i++) {
 239                 printk(" 0x%02x", guest0[i]);
 240         }
 241         printk("\n");
 242         if (j == 0) {
 243                 printk(KERN_INFO "%s: No activity detected.\n", ZR_DEVNAME(zr));
 244                 return;
 245         }
 246         for (i = 0; i < j; i++) {
 247                 printk(KERN_INFO "%s: %6d: %d => 0x%02x\n", ZR_DEVNAME(zr),
 248                        change[i][0], change[i][1], change[i][2]);
 249         }
 250 }
 251
 252 /*
 253  * JPEG Codec access
 254  */
 255
 256 void
 257 jpeg_codec_sleep (struct zoran *zr,
 258                   int           sleep)
 259 {
 260         GPIO(zr, zr->card.gpio[GPIO_JPEG_SLEEP], !sleep);
 261         if (!sleep) {
 262                 dprintk(3,
 263                         KERN_DEBUG
 264                         "%s: jpeg_codec_sleep() - wake GPIO=0x%08x\n",
 265                         ZR_DEVNAME(zr), btread(ZR36057_GPPGCR1));
 266                 udelay(500);
 267         } else {
 268                 dprintk(3,
 269                         KERN_DEBUG
 270                         "%s: jpeg_codec_sleep() - sleep GPIO=0x%08x\n",
 271                         ZR_DEVNAME(zr), btread(ZR36057_GPPGCR1));
 272                 udelay(2);
 273         }
 274 }
 275
 276 int
 277 jpeg_codec_reset (struct zoran *zr)
 278 {
 279         /* Take the codec out of sleep */
 280         jpeg_codec_sleep(zr, 0);
 281
 282         if (zr->card.gpcs[GPCS_JPEG_RESET] != 0xff) {
 283                 post_office_write(zr, zr->card.gpcs[GPCS_JPEG_RESET], 0,
 284                                   0);
 285                 udelay(2);
 286         } else {
 287                 GPIO(zr, zr->card.gpio[GPIO_JPEG_RESET], 0);
 288                 udelay(2);
 289                 GPIO(zr, zr->card.gpio[GPIO_JPEG_RESET], 1);
 290                 udelay(2);
 291         }
 292
 293         return 0;
 294 }
 295
 296 /*
 297  *   Set the registers for the size we have specified. Don't bother
 298  *   trying to understand this without the ZR36057 manual in front of
 299  *   you [AC].
 300  *
 301  *   PS: The manual is free for download in .pdf format from
 302  *   www.zoran.com - nicely done those folks.
 303  */
 304
 305 static void
 306 zr36057_adjust_vfe (struct zoran          *zr,
 307                     enum zoran_codec_mode  mode)
 308 {
 309         u32 reg;
 310
 311         switch (mode) {
 312         case BUZ_MODE_MOTION_DECOMPRESS:
 313                 btand(~ZR36057_VFESPFR_ExtFl, ZR36057_VFESPFR);
 314                 reg = btread(ZR36057_VFEHCR);
 315                 if ((reg & (1 << 10)) && zr->card.type != LML33R10) {
 316                         reg += ((1 << 10) | 1);
 317                 }
 318                 btwrite(reg, ZR36057_VFEHCR);
 319                 break;
 320         case BUZ_MODE_MOTION_COMPRESS:
 321         case BUZ_MODE_IDLE:
 322         default:
 323                 if (zr->norm == VIDEO_MODE_NTSC ||
 324                     (zr->card.type == LML33R10 &&
 325                      zr->norm == VIDEO_MODE_PAL))
 326                         btand(~ZR36057_VFESPFR_ExtFl, ZR36057_VFESPFR);
 327                 else
 328                         btor(ZR36057_VFESPFR_ExtFl, ZR36057_VFESPFR);
 329                 reg = btread(ZR36057_VFEHCR);
 330                 if (!(reg & (1 << 10)) && zr->card.type != LML33R10) {
 331                         reg -= ((1 << 10) | 1);
 332                 }
 333                 btwrite(reg, ZR36057_VFEHCR);
 334                 break;
 335         }
 336 }
 337
 338 /*
 339  * set geometry
 340  */
 341
 342 static void
 343 zr36057_set_vfe (struct zoran              *zr,
 344                  int                        video_width,
 345                  int                        video_height,
 346                  const struct zoran_format *format)
 347 {
 348         struct tvnorm *tvn;
 349         unsigned HStart, HEnd, VStart, VEnd;
 350         unsigned DispMode;
 351         unsigned VidWinWid, VidWinHt;
 352         unsigned hcrop1, hcrop2, vcrop1, vcrop2;
 353         unsigned Wa, We, Ha, He;
 354         unsigned X, Y, HorDcm, VerDcm;
 355         u32 reg;
 356         unsigned mask_line_size;
 357
 358         tvn = zr->timing;
 359
 360         Wa = tvn->Wa;
 361         Ha = tvn->Ha;
 362
 363         dprintk(2, KERN_INFO "%s: set_vfe() - width = %d, height = %d\n",
 364                 ZR_DEVNAME(zr), video_width, video_height);
 365
 366         if (zr->norm != VIDEO_MODE_PAL &&
 367             zr->norm != VIDEO_MODE_NTSC &&
 368             zr->norm != VIDEO_MODE_SECAM) {
 369                 dprintk(1,
 370                         KERN_ERR "%s: set_vfe() - norm = %d not valid\n",
 371                         ZR_DEVNAME(zr), zr->norm);
 372                 return;
 373         }
 374         if (video_width < BUZ_MIN_WIDTH ||
 375             video_height < BUZ_MIN_HEIGHT ||
 376             video_width > Wa || video_height > Ha) {
 377                 dprintk(1, KERN_ERR "%s: set_vfe: w=%d h=%d not valid\n",
 378                         ZR_DEVNAME(zr), video_width, video_height);
 379                 return;
 380         }
 381
 382         /**** zr36057 ****/
 383
 384         /* horizontal */
 385         VidWinWid = video_width;
 386         X = (VidWinWid * 64 + tvn->Wa - 1) / tvn->Wa;
 387         We = (VidWinWid * 64) / X;
 388         HorDcm = 64 - X;
 389         hcrop1 = 2 * ((tvn->Wa - We) / 4);
 390         hcrop2 = tvn->Wa - We - hcrop1;
 391         HStart = tvn->HStart ? tvn->HStart : 1;
 392         /* (Ronald) Original comment:
 393          * "| 1 Doesn't have any effect, tested on both a DC10 and a DC10+"
 394          * this is false. It inverses chroma values on the LML33R10 (so Cr
 395          * suddenly is shown as Cb and reverse, really cool effect if you
 396          * want to see blue faces, not useful otherwise). So don't use |1.
 397          * However, the DC10 has '0' as HStart, but does need |1, so we
 398          * use a dirty check...
 399          */
 400         HEnd = HStart + tvn->Wa - 1;
 401         HStart += hcrop1;
 402         HEnd -= hcrop2;
 403         reg = ((HStart & ZR36057_VFEHCR_Hmask) << ZR36057_VFEHCR_HStart)
 404             | ((HEnd & ZR36057_VFEHCR_Hmask) << ZR36057_VFEHCR_HEnd);
 405         if (zr->card.vfe_pol.hsync_pol)
 406                 reg |= ZR36057_VFEHCR_HSPol;
 407         btwrite(reg, ZR36057_VFEHCR);
 408
 409         /* Vertical */
 410         DispMode = !(video_height > BUZ_MAX_HEIGHT / 2);
 411         VidWinHt = DispMode ? video_height : video_height / 2;
 412         Y = (VidWinHt * 64 * 2 + tvn->Ha - 1) / tvn->Ha;
 413         He = (VidWinHt * 64) / Y;
 414         VerDcm = 64 - Y;
 415         vcrop1 = (tvn->Ha / 2 - He) / 2;
 416         vcrop2 = tvn->Ha / 2 - He - vcrop1;
 417         VStart = tvn->VStart;
 418         VEnd = VStart + tvn->Ha / 2;    // - 1; FIXME SnapShot times out with -1 in 768*576 on the DC10 - LP
 419         VStart += vcrop1;
 420         VEnd -= vcrop2;
 421         reg = ((VStart & ZR36057_VFEVCR_Vmask) << ZR36057_VFEVCR_VStart)
 422             | ((VEnd & ZR36057_VFEVCR_Vmask) << ZR36057_VFEVCR_VEnd);
 423         if (zr->card.vfe_pol.vsync_pol)
 424                 reg |= ZR36057_VFEVCR_VSPol;
 425         btwrite(reg, ZR36057_VFEVCR);
 426
 427         /* scaler and pixel format */
 428         reg = 0;
 429         reg |= (HorDcm << ZR36057_VFESPFR_HorDcm);
 430         reg |= (VerDcm << ZR36057_VFESPFR_VerDcm);
 431         reg |= (DispMode << ZR36057_VFESPFR_DispMode);
 432         if (format->palette != VIDEO_PALETTE_YUV422 && format->palette != VIDEO_PALETTE_YUYV)
 433                 reg |= ZR36057_VFESPFR_LittleEndian;
 434         /* RJ: I don't know, why the following has to be the opposite
 435          * of the corresponding ZR36060 setting, but only this way
 436          * we get the correct colors when uncompressing to the screen  */
 437         //reg |= ZR36057_VFESPFR_VCLKPol; /**/
 438         /* RJ: Don't know if that is needed for NTSC also */
 439         if (zr->norm != VIDEO_MODE_NTSC)
 440                 reg |= ZR36057_VFESPFR_ExtFl;   // NEEDED!!!!!!! Wolfgang
 441         reg |= ZR36057_VFESPFR_TopField;
 442         switch (format->palette) {
 443
 444         case VIDEO_PALETTE_YUYV:
 445         case VIDEO_PALETTE_YUV422:
 446                 reg |= ZR36057_VFESPFR_YUV422;
 447                 break;
 448
 449         case VIDEO_PALETTE_RGB555:
 450                 reg |= ZR36057_VFESPFR_RGB555 | ZR36057_VFESPFR_ErrDif;
 451                 break;
 452
 453         case VIDEO_PALETTE_RGB565:
 454                 reg |= ZR36057_VFESPFR_RGB565 | ZR36057_VFESPFR_ErrDif;
 455                 break;
 456
 457         case VIDEO_PALETTE_RGB24:
 458                 reg |= ZR36057_VFESPFR_RGB888 | ZR36057_VFESPFR_Pack24;
 459                 break;
 460
 461         case VIDEO_PALETTE_RGB32:
 462                 reg |= ZR36057_VFESPFR_RGB888;
 463                 break;
 464
 465         default:
 466                 dprintk(1,
 467                         KERN_INFO "%s: set_vfe() - unknown color_fmt=%x\n",
 468                         ZR_DEVNAME(zr), format->palette);
 469                 return;
 470
 471         }
 472         if (HorDcm >= 48) {
 473                 reg |= 3 << ZR36057_VFESPFR_HFilter;    /* 5 tap filter */
 474         } else if (HorDcm >= 32) {
 475                 reg |= 2 << ZR36057_VFESPFR_HFilter;    /* 4 tap filter */
 476         } else if (HorDcm >= 16) {
 477                 reg |= 1 << ZR36057_VFESPFR_HFilter;    /* 3 tap filter */
 478         }
 479         btwrite(reg, ZR36057_VFESPFR);
 480
 481         /* display configuration */
 482         reg = (16 << ZR36057_VDCR_MinPix)
 483             | (VidWinHt << ZR36057_VDCR_VidWinHt)
 484             | (VidWinWid << ZR36057_VDCR_VidWinWid);
 485         if (pci_pci_problems & PCIPCI_TRITON)
 486                 // || zr->revision < 1) // Revision 1 has also Triton support
 487                 reg &= ~ZR36057_VDCR_Triton;
 488         else
 489                 reg |= ZR36057_VDCR_Triton;
 490         btwrite(reg, ZR36057_VDCR);
 491
 492         /* (Ronald) don't write this if overlay_mask = NULL */
 493         if (zr->overlay_mask) {
 494                 /* Write overlay clipping mask data, but don't enable overlay clipping */
 495                 /* RJ: since this makes only sense on the screen, we use
 496                  * zr->overlay_settings.width instead of video_width */
 497
 498                 mask_line_size = (BUZ_MAX_WIDTH + 31) / 32;
 499                 reg = virt_to_bus(zr->overlay_mask);
 500                 btwrite(reg, ZR36057_MMTR);
 501                 reg = virt_to_bus(zr->overlay_mask + mask_line_size);
 502                 btwrite(reg, ZR36057_MMBR);
 503                 reg =
 504                     mask_line_size - (zr->overlay_settings.width +
 505                                       31) / 32;
 506                 if (DispMode == 0)
 507                         reg += mask_line_size;
 508                 reg <<= ZR36057_OCR_MaskStride;
 509                 btwrite(reg, ZR36057_OCR);
 510         }
 511
 512         zr36057_adjust_vfe(zr, zr->codec_mode);
 513 }
 514
 515 /*
 516  * Switch overlay on or off
 517  */
 518
 519 void
 520 zr36057_overlay (struct zoran *zr,
 521                  int           on)
 522 {
 523         u32 reg;
 524
 525         if (on) {
 526                 /* do the necessary settings ... */
 527                 btand(~ZR36057_VDCR_VidEn, ZR36057_VDCR);       /* switch it off first */
 528
 529                 zr36057_set_vfe(zr,
 530                                 zr->overlay_settings.width,
 531                                 zr->overlay_settings.height,
 532                                 zr->overlay_settings.format);
 533
 534                 /* Start and length of each line MUST be 4-byte aligned.
 535                  * This should be allready checked before the call to this routine.
 536                  * All error messages are internal driver checking only! */
 537
 538                 /* video display top and bottom registers */
 539                 reg = (long) zr->buffer.base +
 540                     zr->overlay_settings.x *
 541                     ((zr->overlay_settings.format->depth + 7) / 8) +
 542                     zr->overlay_settings.y *
 543                     zr->buffer.bytesperline;
 544                 btwrite(reg, ZR36057_VDTR);
 545                 if (reg & 3)
 546                         dprintk(1,
 547                                 KERN_ERR
 548                                 "%s: zr36057_overlay() - video_address not aligned\n",
 549                                 ZR_DEVNAME(zr));
 550                 if (zr->overlay_settings.height > BUZ_MAX_HEIGHT / 2)
 551                         reg += zr->buffer.bytesperline;
 552                 btwrite(reg, ZR36057_VDBR);
 553
 554                 /* video stride, status, and frame grab register */
 555                 reg = zr->buffer.bytesperline -
 556                     zr->overlay_settings.width *
 557                     ((zr->overlay_settings.format->depth + 7) / 8);
 558                 if (zr->overlay_settings.height > BUZ_MAX_HEIGHT / 2)
 559                         reg += zr->buffer.bytesperline;
 560                 if (reg & 3)
 561                         dprintk(1,
 562                                 KERN_ERR
 563                                 "%s: zr36057_overlay() - video_stride not aligned\n",
 564                                 ZR_DEVNAME(zr));
 565                 reg = (reg << ZR36057_VSSFGR_DispStride);
 566                 reg |= ZR36057_VSSFGR_VidOvf;   /* clear overflow status */
 567                 btwrite(reg, ZR36057_VSSFGR);
 568
 569                 /* Set overlay clipping */
 570                 if (zr->overlay_settings.clipcount > 0)
 571                         btor(ZR36057_OCR_OvlEnable, ZR36057_OCR);
 572
 573                 /* ... and switch it on */
 574                 btor(ZR36057_VDCR_VidEn, ZR36057_VDCR);
 575         } else {
 576                 /* Switch it off */
 577                 btand(~ZR36057_VDCR_VidEn, ZR36057_VDCR);
 578         }
 579 }
 580
 581 /*
 582  * The overlay mask has one bit for each pixel on a scan line,
 583  *  and the maximum window size is BUZ_MAX_WIDTH * BUZ_MAX_HEIGHT pixels.
 584  */
 585
 586 void
 587 write_overlay_mask (struct file       *file,
 588                     struct video_clip *vp,
 589                     int                count)
 590 {
 591         struct zoran_fh *fh = file->private_data;
 592         struct zoran *zr = fh->zr;
 593         unsigned mask_line_size = (BUZ_MAX_WIDTH + 31) / 32;
 594         u32 *mask;
 595         int x, y, width, height;
 596         unsigned i, j, k;
 597         u32 reg;
 598
 599         /* fill mask with one bits */
 600         memset(fh->overlay_mask, ~0, mask_line_size * 4 * BUZ_MAX_HEIGHT);
 601         reg = 0;
 602
 603         for (i = 0; i < count; ++i) {
 604                 /* pick up local copy of clip */
 605                 x = vp[i].x;
 606                 y = vp[i].y;
 607                 width = vp[i].width;
 608                 height = vp[i].height;
 609
 610                 /* trim clips that extend beyond the window */
 611                 if (x < 0) {
 612                         width += x;
 613                         x = 0;
 614                 }
 615                 if (y < 0) {
 616                         height += y;
 617                         y = 0;
 618                 }
 619                 if (x + width > fh->overlay_settings.width) {
 620                         width = fh->overlay_settings.width - x;
 621                 }
 622                 if (y + height > fh->overlay_settings.height) {
 623                         height = fh->overlay_settings.height - y;
 624                 }
 625
 626                 /* ignore degenerate clips */
 627                 if (height <= 0) {
 628                         continue;
 629                 }
 630                 if (width <= 0) {
 631                         continue;
 632                 }
 633
 634                 /* apply clip for each scan line */
 635                 for (j = 0; j < height; ++j) {
 636                         /* reset bit for each pixel */
 637                         /* this can be optimized later if need be */
 638                         mask = fh->overlay_mask + (y + j) * mask_line_size;
 639                         for (k = 0; k < width; ++k) {
 640                                 mask[(x + k) / 32] &=
 641                                     ~((u32) 1 << (x + k) % 32);
 642                         }
 643                 }
 644         }
 645 }
 646
 647 /* Enable/Disable uncompressed memory grabbing of the 36057 */
 648
 649 void
 650 zr36057_set_memgrab (struct zoran *zr,
 651                      int           mode)
 652 {
 653         if (mode) {
 654                 if (btread(ZR36057_VSSFGR) &
 655                     (ZR36057_VSSFGR_SnapShot | ZR36057_VSSFGR_FrameGrab))
 656                         dprintk(1,
 657                                 KERN_WARNING
 658                                 "%s: zr36057_set_memgrab(1) with SnapShot or FrameGrab on!?\n",
 659                                 ZR_DEVNAME(zr));
 660
 661                 /* switch on VSync interrupts */
 662                 btwrite(IRQ_MASK, ZR36057_ISR); // Clear Interrupts
 663                 btor(zr->card.vsync_int, ZR36057_ICR);  // SW
 664
 665                 /* enable SnapShot */
 666                 btor(ZR36057_VSSFGR_SnapShot, ZR36057_VSSFGR);
 667
 668                 /* Set zr36057 video front end  and enable video */
 669                 zr36057_set_vfe(zr, zr->v4l_settings.width,
 670                                 zr->v4l_settings.height,
 671                                 zr->v4l_settings.format);
 672
 673                 zr->v4l_memgrab_active = 1;
 674         } else {
 675                 zr->v4l_memgrab_active = 0;
 676
 677                 /* switch off VSync interrupts */
 678                 btand(~zr->card.vsync_int, ZR36057_ICR);        // SW
 679
 680                 /* reenable grabbing to screen if it was running */
 681                 if (zr->v4l_overlay_active) {
 682                         zr36057_overlay(zr, 1);
 683                 } else {
 684                         btand(~ZR36057_VDCR_VidEn, ZR36057_VDCR);
 685                         btand(~ZR36057_VSSFGR_SnapShot, ZR36057_VSSFGR);
 686                 }
 687         }
 688 }
 689
 690 int
 691 wait_grab_pending (struct zoran *zr)
 692 {
 693         unsigned long flags;
 694
 695         /* wait until all pending grabs are finished */
 696
 697         if (!zr->v4l_memgrab_active)
 698                 return 0;
 699
 700         wait_event_interruptible(zr->v4l_capq,
 701                         (zr->v4l_pend_tail == zr->v4l_pend_head));
 702         if (signal_pending(current))
 703                 return -ERESTARTSYS;
 704
 705         spin_lock_irqsave(&zr->spinlock, flags);
 706         zr36057_set_memgrab(zr, 0);
 707         spin_unlock_irqrestore(&zr->spinlock, flags);
 708
 709         return 0;
 710 }
 711
 712 /*****************************************************************************
 713  *                                                                           *
 714  *  Set up the Buz-specific MJPEG part                                       *
 715  *                                                                           *
 716  *****************************************************************************/
 717
 718 static inline void
 719 set_frame (struct zoran *zr,
 720            int           val)
 721 {
 722         GPIO(zr, zr->card.gpio[GPIO_JPEG_FRAME], val);
 723 }
 724
 725 static void
 726 set_videobus_dir (struct zoran *zr,
 727                   int           val)
 728 {
 729         switch (zr->card.type) {
 730         case LML33:
 731         case LML33R10:
 732                 if (lml33dpath == 0)
 733                         GPIO(zr, 5, val);
 734                 else
 735                         GPIO(zr, 5, 1);
 736                 break;
 737         default:
 738                 GPIO(zr, zr->card.gpio[GPIO_VID_DIR],
 739                      zr->card.gpio_pol[GPIO_VID_DIR] ? !val : val);
 740                 break;
 741         }
 742 }
 743
 744 static void
 745 init_jpeg_queue (struct zoran *zr)
 746 {
 747         int i;
 748
 749         /* re-initialize DMA ring stuff */
 750         zr->jpg_que_head = 0;
 751         zr->jpg_dma_head = 0;
 752         zr->jpg_dma_tail = 0;
 753         zr->jpg_que_tail = 0;
 754         zr->jpg_seq_num = 0;
 755         zr->JPEG_error = 0;
 756         zr->num_errors = 0;
 757         zr->jpg_err_seq = 0;
 758         zr->jpg_err_shift = 0;
 759         zr->jpg_queued_num = 0;
 760         for (i = 0; i < zr->jpg_buffers.num_buffers; i++) {
 761                 zr->jpg_buffers.buffer[i].state = BUZ_STATE_USER;       /* nothing going on */
 762         }
 763         for (i = 0; i < BUZ_NUM_STAT_COM; i++) {
 764                 zr->stat_com[i] = cpu_to_le32(1);       /* mark as unavailable to zr36057 */
 765         }
 766 }
 767
 768 static void
 769 zr36057_set_jpg (struct zoran          *zr,
 770                  enum zoran_codec_mode  mode)
 771 {
 772         struct tvnorm *tvn;
 773         u32 reg;
 774
 775         tvn = zr->timing;
 776
 777         /* assert P_Reset, disable code transfer, deassert Active */
 778         btwrite(0, ZR36057_JPC);
 779
 780         /* MJPEG compression mode */
 781         switch (mode) {
 782
 783         case BUZ_MODE_MOTION_COMPRESS:
 784         default:
 785                 reg = ZR36057_JMC_MJPGCmpMode;
 786                 break;
 787
 788         case BUZ_MODE_MOTION_DECOMPRESS:
 789                 reg = ZR36057_JMC_MJPGExpMode;
 790                 reg |= ZR36057_JMC_SyncMstr;
 791                 /* RJ: The following is experimental - improves the output to screen */
 792                 //if(zr->jpg_settings.VFIFO_FB) reg |= ZR36057_JMC_VFIFO_FB; // No, it doesn't. SM
 793                 break;
 794
 795         case BUZ_MODE_STILL_COMPRESS:
 796                 reg = ZR36057_JMC_JPGCmpMode;
 797                 break;
 798
 799         case BUZ_MODE_STILL_DECOMPRESS:
 800                 reg = ZR36057_JMC_JPGExpMode;
 801                 break;
 802
 803         }
 804         reg |= ZR36057_JMC_JPG;
 805         if (zr->jpg_settings.field_per_buff == 1)
 806                 reg |= ZR36057_JMC_Fld_per_buff;
 807         btwrite(reg, ZR36057_JMC);
 808
 809         /* vertical */
 810         btor(ZR36057_VFEVCR_VSPol, ZR36057_VFEVCR);
 811         reg = (6 << ZR36057_VSP_VsyncSize) |
 812               (tvn->Ht << ZR36057_VSP_FrmTot);
 813         btwrite(reg, ZR36057_VSP);
 814         reg = ((zr->jpg_settings.img_y + tvn->VStart) << ZR36057_FVAP_NAY) |
 815               (zr->jpg_settings.img_height << ZR36057_FVAP_PAY);
 816         btwrite(reg, ZR36057_FVAP);
 817
 818         /* horizontal */
 819         if (zr->card.vfe_pol.hsync_pol)
 820                 btor(ZR36057_VFEHCR_HSPol, ZR36057_VFEHCR);
 821         else
 822                 btand(~ZR36057_VFEHCR_HSPol, ZR36057_VFEHCR);
 823         reg = ((tvn->HSyncStart) << ZR36057_HSP_HsyncStart) |
 824               (tvn->Wt << ZR36057_HSP_LineTot);
 825         btwrite(reg, ZR36057_HSP);
 826         reg = ((zr->jpg_settings.img_x +
 827                 tvn->HStart + 4) << ZR36057_FHAP_NAX) |
 828               (zr->jpg_settings.img_width << ZR36057_FHAP_PAX);
 829         btwrite(reg, ZR36057_FHAP);
 830
 831         /* field process parameters */
 832         if (zr->jpg_settings.odd_even)
 833                 reg = ZR36057_FPP_Odd_Even;
 834         else
 835                 reg = 0;
 836
 837         btwrite(reg, ZR36057_FPP);
 838
 839         /* Set proper VCLK Polarity, else colors will be wrong during playback */
 840         //btor(ZR36057_VFESPFR_VCLKPol, ZR36057_VFESPFR);
 841
 842         /* code base address */
 843         reg = virt_to_bus(zr->stat_com);
 844         btwrite(reg, ZR36057_JCBA);
 845
 846         /* FIFO threshold (FIFO is 160. double words) */
 847         /* NOTE: decimal values here */
 848         switch (mode) {
 849
 850         case BUZ_MODE_STILL_COMPRESS:
 851         case BUZ_MODE_MOTION_COMPRESS:
 852                 if (zr->card.type != BUZ)
 853                         reg = 140;
 854                 else
 855                         reg = 60;
 856                 break;
 857
 858         case BUZ_MODE_STILL_DECOMPRESS:
 859         case BUZ_MODE_MOTION_DECOMPRESS:
 860                 reg = 20;
 861                 break;
 862
 863         default:
 864                 reg = 80;
 865                 break;
 866
 867         }
 868         btwrite(reg, ZR36057_JCFT);
 869         zr36057_adjust_vfe(zr, mode);
 870
 871 }
 872
 873 void
 874 print_interrupts (struct zoran *zr)
 875 {
 876         int res, noerr = 0;
 877
 878         printk(KERN_INFO "%s: interrupts received:", ZR_DEVNAME(zr));
 879         if ((res = zr->field_counter) < -1 || res > 1) {
 880                 printk(" FD:%d", res);
 881         }
 882         if ((res = zr->intr_counter_GIRQ1) != 0) {
 883                 printk(" GIRQ1:%d", res);
 884                 noerr++;
 885         }
 886         if ((res = zr->intr_counter_GIRQ0) != 0) {
 887                 printk(" GIRQ0:%d", res);
 888                 noerr++;
 889         }
 890         if ((res = zr->intr_counter_CodRepIRQ) != 0) {
 891                 printk(" CodRepIRQ:%d", res);
 892                 noerr++;
 893         }
 894         if ((res = zr->intr_counter_JPEGRepIRQ) != 0) {
 895                 printk(" JPEGRepIRQ:%d", res);
 896                 noerr++;
 897         }
 898         if (zr->JPEG_max_missed) {
 899                 printk(" JPEG delays: max=%d min=%d", zr->JPEG_max_missed,
 900                        zr->JPEG_min_missed);
 901         }
 902         if (zr->END_event_missed) {
 903                 printk(" ENDs missed: %d", zr->END_event_missed);
 904         }
 905         //if (zr->jpg_queued_num) {
 906         printk(" queue_state=%ld/%ld/%ld/%ld", zr->jpg_que_tail,
 907                zr->jpg_dma_tail, zr->jpg_dma_head, zr->jpg_que_head);
 908         //}
 909         if (!noerr) {
 910                 printk(": no interrupts detected.");
 911         }
 912         printk("\n");
 913 }
 914
 915 void
 916 clear_interrupt_counters (struct zoran *zr)
 917 {
 918         zr->intr_counter_GIRQ1 = 0;
 919         zr->intr_counter_GIRQ0 = 0;
 920         zr->intr_counter_CodRepIRQ = 0;
 921         zr->intr_counter_JPEGRepIRQ = 0;
 922         zr->field_counter = 0;
 923         zr->IRQ1_in = 0;
 924         zr->IRQ1_out = 0;
 925         zr->JPEG_in = 0;
 926         zr->JPEG_out = 0;
 927         zr->JPEG_0 = 0;
 928         zr->JPEG_1 = 0;
 929         zr->END_event_missed = 0;
 930         zr->JPEG_missed = 0;
 931         zr->JPEG_max_missed = 0;
 932         zr->JPEG_min_missed = 0x7fffffff;
 933 }
 934
 935 static u32
 936 count_reset_interrupt (struct zoran *zr)
 937 {
 938         u32 isr;
 939
 940         if ((isr = btread(ZR36057_ISR) & 0x78000000)) {
 941                 if (isr & ZR36057_ISR_GIRQ1) {
 942                         btwrite(ZR36057_ISR_GIRQ1, ZR36057_ISR);
 943                         zr->intr_counter_GIRQ1++;
 944                 }
 945                 if (isr & ZR36057_ISR_GIRQ0) {
 946                         btwrite(ZR36057_ISR_GIRQ0, ZR36057_ISR);
 947                         zr->intr_counter_GIRQ0++;
 948                 }
 949                 if (isr & ZR36057_ISR_CodRepIRQ) {
 950                         btwrite(ZR36057_ISR_CodRepIRQ, ZR36057_ISR);
 951                         zr->intr_counter_CodRepIRQ++;
 952                 }
 953                 if (isr & ZR36057_ISR_JPEGRepIRQ) {
 954                         btwrite(ZR36057_ISR_JPEGRepIRQ, ZR36057_ISR);
 955                         zr->intr_counter_JPEGRepIRQ++;
 956                 }
 957         }
 958         return isr;
 959 }
 960
 961 /* hack */
 962 extern void zr36016_write (struct videocodec *codec,
 963                            u16                reg,
 964                            u32                val);
 965
 966 void
 967 jpeg_start (struct zoran *zr)
 968 {
 969         int reg;
 970
 971         zr->frame_num = 0;
 972
 973         /* deassert P_reset, disable code transfer, deassert Active */
 974         btwrite(ZR36057_JPC_P_Reset, ZR36057_JPC);
 975         /* stop flushing the internal code buffer */
 976         btand(~ZR36057_MCTCR_CFlush, ZR36057_MCTCR);
 977         /* enable code transfer */
 978         btor(ZR36057_JPC_CodTrnsEn, ZR36057_JPC);
 979
 980         /* clear IRQs */
 981         btwrite(IRQ_MASK, ZR36057_ISR);
 982         /* enable the JPEG IRQs */
 983         btwrite(zr->card.jpeg_int |
 984                         ZR36057_ICR_JPEGRepIRQ |
 985                         ZR36057_ICR_IntPinEn,
 986                 ZR36057_ICR);
 987
 988         set_frame(zr, 0);       // \FRAME
 989
 990         /* set the JPEG codec guest ID */
 991         reg = (zr->card.gpcs[1] << ZR36057_JCGI_JPEGuestID) |
 992                (0 << ZR36057_JCGI_JPEGuestReg);
 993         btwrite(reg, ZR36057_JCGI);
 994
 995         if (zr->card.video_vfe == CODEC_TYPE_ZR36016 &&
 996             zr->card.video_codec == CODEC_TYPE_ZR36050) {
 997                 /* Enable processing on the ZR36016 */
 998                 if (zr->vfe)
 999                         zr36016_write(zr->vfe, 0, 1);
1000
1001                 /* load the address of the GO register in the ZR36050 latch */
1002                 post_office_write(zr, 0, 0, 0);
1003         }
1004
1005         /* assert Active */
1006         btor(ZR36057_JPC_Active, ZR36057_JPC);
1007
1008         /* enable the Go generation */
1009         btor(ZR36057_JMC_Go_en, ZR36057_JMC);
1010         udelay(30);
1011
1012         set_frame(zr, 1);       // /FRAME
1013
1014         dprintk(3, KERN_DEBUG "%s: jpeg_start\n", ZR_DEVNAME(zr));
1015 }
1016
1017 void
1018 zr36057_enable_jpg (struct zoran          *zr,
1019                     enum zoran_codec_mode  mode)
1020 {
1021         static int zero = 0;
1022         static int one = 1;
1023         struct vfe_settings cap;
1024         int field_size =
1025             zr->jpg_buffers.buffer_size / zr->jpg_settings.field_per_buff;
1026
1027         zr->codec_mode = mode;
1028
1029         cap.x = zr->jpg_settings.img_x;
1030         cap.y = zr->jpg_settings.img_y;
1031         cap.width = zr->jpg_settings.img_width;
1032         cap.height = zr->jpg_settings.img_height;
1033         cap.decimation =
1034             zr->jpg_settings.HorDcm | (zr->jpg_settings.VerDcm << 8);
1035         cap.quality = zr->jpg_settings.jpg_comp.quality;
1036
1037         switch (mode) {
1038
1039         case BUZ_MODE_MOTION_COMPRESS: {
1040                 struct jpeg_app_marker app;
1041                 struct jpeg_com_marker com;
1042
1043                 /* In motion compress mode, the decoder output must be enabled, and
1044                  * the video bus direction set to input.
1045                  */
1046                 set_videobus_dir(zr, 0);
1047                 decoder_command(zr, DECODER_ENABLE_OUTPUT, &one);
1048                 encoder_command(zr, ENCODER_SET_INPUT, &zero);
1049
1050                 /* Take the JPEG codec and the VFE out of sleep */
1051                 jpeg_codec_sleep(zr, 0);
1052
1053                 /* set JPEG app/com marker */
1054                 app.appn = zr->jpg_settings.jpg_comp.APPn;
1055                 app.len = zr->jpg_settings.jpg_comp.APP_len;
1056                 memcpy(app.data, zr->jpg_settings.jpg_comp.APP_data, 60);
1057                 zr->codec->control(zr->codec, CODEC_S_JPEG_APP_DATA,
1058                                    sizeof(struct jpeg_app_marker), &app);
1059
1060                 com.len = zr->jpg_settings.jpg_comp.COM_len;
1061                 memcpy(com.data, zr->jpg_settings.jpg_comp.COM_data, 60);
1062                 zr->codec->control(zr->codec, CODEC_S_JPEG_COM_DATA,
1063                                    sizeof(struct jpeg_com_marker), &com);
1064
1065                 /* Setup the JPEG codec */
1066                 zr->codec->control(zr->codec, CODEC_S_JPEG_TDS_BYTE,
1067                                    sizeof(int), &field_size);
1068                 zr->codec->set_video(zr->codec, zr->timing, &cap,
1069                                      &zr->card.vfe_pol);
1070                 zr->codec->set_mode(zr->codec, CODEC_DO_COMPRESSION);
1071
1072                 /* Setup the VFE */
1073                 if (zr->vfe) {
1074                         zr->vfe->control(zr->vfe, CODEC_S_JPEG_TDS_BYTE,
1075                                          sizeof(int), &field_size);
1076                         zr->vfe->set_video(zr->vfe, zr->timing, &cap,
1077                                            &zr->card.vfe_pol);
1078                         zr->vfe->set_mode(zr->vfe, CODEC_DO_COMPRESSION);
1079                 }
1080
1081                 init_jpeg_queue(zr);
1082                 zr36057_set_jpg(zr, mode);      // \P_Reset, ... Video param, FIFO
1083
1084                 clear_interrupt_counters(zr);
1085                 dprintk(2, KERN_INFO "%s: enable_jpg(MOTION_COMPRESS)\n",
1086                         ZR_DEVNAME(zr));
1087                 break;
1088         }
1089
1090         case BUZ_MODE_MOTION_DECOMPRESS:
1091                 /* In motion decompression mode, the decoder output must be disabled, and
1092                  * the video bus direction set to output.
1093                  */
1094                 decoder_command(zr, DECODER_ENABLE_OUTPUT, &zero);
1095                 set_videobus_dir(zr, 1);
1096                 encoder_command(zr, ENCODER_SET_INPUT, &one);
1097
1098                 /* Take the JPEG codec and the VFE out of sleep */
1099                 jpeg_codec_sleep(zr, 0);
1100                 /* Setup the VFE */
1101                 if (zr->vfe) {
1102                         zr->vfe->set_video(zr->vfe, zr->timing, &cap,
1103                                            &zr->card.vfe_pol);
1104                         zr->vfe->set_mode(zr->vfe, CODEC_DO_EXPANSION);
1105                 }
1106                 /* Setup the JPEG codec */
1107                 zr->codec->set_video(zr->codec, zr->timing, &cap,
1108                                      &zr->card.vfe_pol);
1109                 zr->codec->set_mode(zr->codec, CODEC_DO_EXPANSION);
1110
1111                 init_jpeg_queue(zr);
1112                 zr36057_set_jpg(zr, mode);      // \P_Reset, ... Video param, FIFO
1113
1114                 clear_interrupt_counters(zr);
1115                 dprintk(2, KERN_INFO "%s: enable_jpg(MOTION_DECOMPRESS)\n",
1116                         ZR_DEVNAME(zr));
1117                 break;
1118
1119         case BUZ_MODE_IDLE:
1120         default:
1121                 /* shut down processing */
1122                 btand(~(zr->card.jpeg_int | ZR36057_ICR_JPEGRepIRQ),
1123                       ZR36057_ICR);
1124                 btwrite(zr->card.jpeg_int | ZR36057_ICR_JPEGRepIRQ,
1125                         ZR36057_ISR);
1126                 btand(~ZR36057_JMC_Go_en, ZR36057_JMC); // \Go_en
1127
1128                 msleep(50);
1129
1130                 set_videobus_dir(zr, 0);
1131                 set_frame(zr, 1);       // /FRAME
1132                 btor(ZR36057_MCTCR_CFlush, ZR36057_MCTCR);      // /CFlush
1133                 btwrite(0, ZR36057_JPC);        // \P_Reset,\CodTrnsEn,\Active
1134                 btand(~ZR36057_JMC_VFIFO_FB, ZR36057_JMC);
1135                 btand(~ZR36057_JMC_SyncMstr, ZR36057_JMC);
1136                 jpeg_codec_reset(zr);
1137                 jpeg_codec_sleep(zr, 1);
1138                 zr36057_adjust_vfe(zr, mode);
1139
1140                 decoder_command(zr, DECODER_ENABLE_OUTPUT, &one);
1141                 encoder_command(zr, ENCODER_SET_INPUT, &zero);
1142
1143                 dprintk(2, KERN_INFO "%s: enable_jpg(IDLE)\n", ZR_DEVNAME(zr));
1144                 break;
1145
1146         }
1147 }
1148
1149 /* when this is called the spinlock must be held */
1150 void
1151 zoran_feed_stat_com (struct zoran *zr)
1152 {
1153         /* move frames from pending queue to DMA */
1154
1155         int frame, i, max_stat_com;
1156
1157         max_stat_com =
1158             (zr->jpg_settings.TmpDcm ==
1159              1) ? BUZ_NUM_STAT_COM : (BUZ_NUM_STAT_COM >> 1);
1160
1161         while ((zr->jpg_dma_head - zr->jpg_dma_tail) < max_stat_com &&
1162                zr->jpg_dma_head < zr->jpg_que_head) {
1163
1164                 frame = zr->jpg_pend[zr->jpg_dma_head & BUZ_MASK_FRAME];
1165                 if (zr->jpg_settings.TmpDcm == 1) {
1166                         /* fill 1 stat_com entry */
1167                         i = (zr->jpg_dma_head -
1168                              zr->jpg_err_shift) & BUZ_MASK_STAT_COM;
1169                         if (!(zr->stat_com[i] & cpu_to_le32(1)))
1170                                 break;
1171                         zr->stat_com[i] =
1172                             cpu_to_le32(zr->jpg_buffers.buffer[frame].frag_tab_bus);
1173                 } else {
1174                         /* fill 2 stat_com entries */
1175                         i = ((zr->jpg_dma_head -
1176                               zr->jpg_err_shift) & 1) * 2;
1177                         if (!(zr->stat_com[i] & cpu_to_le32(1)))
1178                                 break;
1179                         zr->stat_com[i] =
1180                             cpu_to_le32(zr->jpg_buffers.buffer[frame].frag_tab_bus);
1181                         zr->stat_com[i + 1] =
1182                             cpu_to_le32(zr->jpg_buffers.buffer[frame].frag_tab_bus);
1183                 }
1184                 zr->jpg_buffers.buffer[frame].state = BUZ_STATE_DMA;
1185                 zr->jpg_dma_head++;
1186
1187         }
1188         if (zr->codec_mode == BUZ_MODE_MOTION_DECOMPRESS)
1189                 zr->jpg_queued_num++;
1190 }
1191
1192 /* when this is called the spinlock must be held */
1193 static void
1194 zoran_reap_stat_com (struct zoran *zr)
1195 {
1196         /* move frames from DMA queue to done queue */
1197
1198         int i;
1199         u32 stat_com;
1200         unsigned int seq;
1201         unsigned int dif;
1202         struct zoran_jpg_buffer *buffer;
1203         int frame;
1204
1205         /* In motion decompress we don't have a hardware frame counter,
1206          * we just count the interrupts here */
1207
1208         if (zr->codec_mode == BUZ_MODE_MOTION_DECOMPRESS) {
1209                 zr->jpg_seq_num++;
1210         }
1211         while (zr->jpg_dma_tail < zr->jpg_dma_head) {
1212                 if (zr->jpg_settings.TmpDcm == 1)
1213                         i = (zr->jpg_dma_tail -
1214                              zr->jpg_err_shift) & BUZ_MASK_STAT_COM;
1215                 else
1216                         i = ((zr->jpg_dma_tail -
1217                               zr->jpg_err_shift) & 1) * 2 + 1;
1218
1219                 stat_com = le32_to_cpu(zr->stat_com[i]);
1220
1221                 if ((stat_com & 1) == 0) {
1222                         return;
1223                 }
1224                 frame = zr->jpg_pend[zr->jpg_dma_tail & BUZ_MASK_FRAME];
1225                 buffer = &zr->jpg_buffers.buffer[frame];
1226                 do_gettimeofday(&buffer->bs.timestamp);
1227
1228                 if (zr->codec_mode == BUZ_MODE_MOTION_COMPRESS) {
1229                         buffer->bs.length = (stat_com & 0x7fffff) >> 1;
1230
1231                         /* update sequence number with the help of the counter in stat_com */
1232
1233                         seq = ((stat_com >> 24) + zr->jpg_err_seq) & 0xff;
1234                         dif = (seq - zr->jpg_seq_num) & 0xff;
1235                         zr->jpg_seq_num += dif;
1236                 } else {
1237                         buffer->bs.length = 0;
1238                 }
1239                 buffer->bs.seq =
1240                     zr->jpg_settings.TmpDcm ==
1241                     2 ? (zr->jpg_seq_num >> 1) : zr->jpg_seq_num;
1242                 buffer->state = BUZ_STATE_DONE;
1243
1244                 zr->jpg_dma_tail++;
1245         }
1246 }
1247
1248 static void
1249 error_handler (struct zoran *zr,
1250                u32           astat,
1251                u32           stat)
1252 {
1253         /* This is JPEG error handling part */
1254         if ((zr->codec_mode != BUZ_MODE_MOTION_COMPRESS) &&
1255             (zr->codec_mode != BUZ_MODE_MOTION_DECOMPRESS)) {
1256                 //dprintk(1, KERN_ERR "%s: Internal error: error handling request in mode %d\n", ZR_DEVNAME(zr), zr->codec_mode);
1257                 return;
1258         }
1259
1260         if ((stat & 1) == 0 &&
1261             zr->codec_mode == BUZ_MODE_MOTION_COMPRESS &&
1262             zr->jpg_dma_tail - zr->jpg_que_tail >=
1263              zr->jpg_buffers.num_buffers) {
1264                 /* No free buffers... */
1265                 zoran_reap_stat_com(zr);
1266                 zoran_feed_stat_com(zr);
1267                 wake_up_interruptible(&zr->jpg_capq);
1268                 zr->JPEG_missed = 0;
1269                 return;
1270         }
1271
1272         if (zr->JPEG_error != 1) {
1273                 /*
1274                  * First entry: error just happened during normal operation
1275                  *
1276                  * In BUZ_MODE_MOTION_COMPRESS:
1277                  *
1278                  * Possible glitch in TV signal. In this case we should
1279                  * stop the codec and wait for good quality signal before
1280                  * restarting it to avoid further problems
1281                  *
1282                  * In BUZ_MODE_MOTION_DECOMPRESS:
1283                  *
1284                  * Bad JPEG frame: we have to mark it as processed (codec crashed
1285                  * and was not able to do it itself), and to remove it from queue.
1286                  */
1287                 btand(~ZR36057_JMC_Go_en, ZR36057_JMC);
1288                 udelay(1);
1289                 stat = stat | (post_office_read(zr, 7, 0) & 3) << 8;
1290                 btwrite(0, ZR36057_JPC);
1291                 btor(ZR36057_MCTCR_CFlush, ZR36057_MCTCR);
1292                 jpeg_codec_reset(zr);
1293                 jpeg_codec_sleep(zr, 1);
1294                 zr->JPEG_error = 1;
1295                 zr->num_errors++;
1296
1297                 /* Report error */
1298                 if (*zr_debug > 1 && zr->num_errors <= 8) {
1299                         long frame;
1300                         frame =
1301                             zr->jpg_pend[zr->jpg_dma_tail & BUZ_MASK_FRAME];
1302                         printk(KERN_ERR
1303                                "%s: JPEG error stat=0x%08x(0x%08x) queue_state=%ld/%ld/%ld/%ld seq=%ld frame=%ld. Codec stopped. ",
1304                                ZR_DEVNAME(zr), stat, zr->last_isr,
1305                                zr->jpg_que_tail, zr->jpg_dma_tail,
1306                                zr->jpg_dma_head, zr->jpg_que_head,
1307                                zr->jpg_seq_num, frame);
1308                         printk("stat_com frames:");
1309                         {
1310                                 int i, j;
1311                                 for (j = 0; j < BUZ_NUM_STAT_COM; j++) {
1312                                         for (i = 0;
1313                                              i < zr->jpg_buffers.num_buffers;
1314                                              i++) {
1315                                                 if (le32_to_cpu(zr->stat_com[j]) ==
1316                                                     zr->jpg_buffers.
1317                                                     buffer[i].
1318                                                     frag_tab_bus) {
1319                                                         printk("% d->%d",
1320                                                                j, i);
1321                                                 }
1322                                         }
1323                                 }
1324                                 printk("\n");
1325                         }
1326                 }
1327                 /* Find an entry in stat_com and rotate contents */
1328                 {
1329                         int i;
1330
1331                         if (zr->jpg_settings.TmpDcm == 1)
1332                                 i = (zr->jpg_dma_tail -
1333                                      zr->jpg_err_shift) & BUZ_MASK_STAT_COM;
1334                         else
1335                                 i = ((zr->jpg_dma_tail -
1336                                       zr->jpg_err_shift) & 1) * 2;
1337                         if (zr->codec_mode == BUZ_MODE_MOTION_DECOMPRESS) {
1338                                 /* Mimic zr36067 operation */
1339                                 zr->stat_com[i] |= cpu_to_le32(1);
1340                                 if (zr->jpg_settings.TmpDcm != 1)
1341                                         zr->stat_com[i + 1] |= cpu_to_le32(1);
1342                                 /* Refill */
1343                                 zoran_reap_stat_com(zr);
1344                                 zoran_feed_stat_com(zr);
1345                                 wake_up_interruptible(&zr->jpg_capq);
1346                                 /* Find an entry in stat_com again after refill */
1347                                 if (zr->jpg_settings.TmpDcm == 1)
1348                                         i = (zr->jpg_dma_tail -
1349                                              zr->jpg_err_shift) &
1350                                             BUZ_MASK_STAT_COM;
1351                                 else
1352                                         i = ((zr->jpg_dma_tail -
1353                                               zr->jpg_err_shift) & 1) * 2;
1354                         }
1355                         if (i) {
1356                                 /* Rotate stat_comm entries to make current entry first */
1357                                 int j;
1358                                 u32 bus_addr[BUZ_NUM_STAT_COM];
1359
1360                                 /* Here we are copying the stat_com array, which
1361                                  * is already in little endian format, so
1362                                  * no endian conversions here
1363                                  */
1364                                 memcpy(bus_addr, zr->stat_com,
1365                                        sizeof(bus_addr));
1366                                 for (j = 0; j < BUZ_NUM_STAT_COM; j++) {
1367                                         zr->stat_com[j] =
1368                                             bus_addr[(i + j) &
1369                                                      BUZ_MASK_STAT_COM];
1370
1371                                 }
1372                                 zr->jpg_err_shift += i;
1373                                 zr->jpg_err_shift &= BUZ_MASK_STAT_COM;
1374                         }
1375                         if (zr->codec_mode == BUZ_MODE_MOTION_COMPRESS)
1376                                 zr->jpg_err_seq = zr->jpg_seq_num;      /* + 1; */
1377                 }
1378         }
1379
1380         /* Now the stat_comm buffer is ready for restart */
1381         do {
1382                 int status, mode;
1383
1384                 if (zr->codec_mode == BUZ_MODE_MOTION_COMPRESS) {
1385                         decoder_command(zr, DECODER_GET_STATUS, &status);
1386                         mode = CODEC_DO_COMPRESSION;
1387                 } else {
1388                         status = 0;
1389                         mode = CODEC_DO_EXPANSION;
1390                 }
1391                 if (zr->codec_mode == BUZ_MODE_MOTION_DECOMPRESS ||
1392                     (status & DECODER_STATUS_GOOD)) {
1393                         /********** RESTART code *************/
1394                         jpeg_codec_reset(zr);
1395                         zr->codec->set_mode(zr->codec, mode);
1396                         zr36057_set_jpg(zr, zr->codec_mode);
1397                         jpeg_start(zr);
1398
1399                         if (zr->num_errors <= 8)
1400                                 dprintk(2, KERN_INFO "%s: Restart\n",
1401                                         ZR_DEVNAME(zr));
1402
1403                         zr->JPEG_missed = 0;
1404                         zr->JPEG_error = 2;
1405                         /********** End RESTART code ***********/
1406                 }
1407         } while (0);
1408 }
1409
1410 irqreturn_t
1411 zoran_irq (int             irq,
1412            void           *dev_id)
1413 {
1414         u32 stat, astat;
1415         int count;
1416         struct zoran *zr;
1417         unsigned long flags;
1418
1419         zr = dev_id;
1420         count = 0;
1421
1422         if (zr->testing) {
1423                 /* Testing interrupts */
1424                 spin_lock_irqsave(&zr->spinlock, flags);
1425                 while ((stat = count_reset_interrupt(zr))) {
1426                         if (count++ > 100) {
1427                                 btand(~ZR36057_ICR_IntPinEn, ZR36057_ICR);
1428                                 dprintk(1,
1429                                         KERN_ERR
1430                                         "%s: IRQ lockup while testing, isr=0x%08x, cleared int mask\n",
1431                                         ZR_DEVNAME(zr), stat);
1432                                 wake_up_interruptible(&zr->test_q);
1433                         }
1434                 }
1435                 zr->last_isr = stat;
1436                 spin_unlock_irqrestore(&zr->spinlock, flags);
1437                 return IRQ_HANDLED;
1438         }
1439
1440         spin_lock_irqsave(&zr->spinlock, flags);
1441         while (1) {
1442                 /* get/clear interrupt status bits */
1443                 stat = count_reset_interrupt(zr);
1444                 astat = stat & IRQ_MASK;
1445                 if (!astat) {
1446                         break;
1447                 }
1448                 dprintk(4,
1449                         KERN_DEBUG
1450                         "zoran_irq: astat: 0x%08x, mask: 0x%08x\n",
1451                         astat, btread(ZR36057_ICR));
1452                 if (astat & zr->card.vsync_int) {       // SW
1453
1454                         if (zr->codec_mode == BUZ_MODE_MOTION_DECOMPRESS ||
1455                             zr->codec_mode == BUZ_MODE_MOTION_COMPRESS) {
1456                                 /* count missed interrupts */
1457                                 zr->JPEG_missed++;
1458                         }
1459                         //post_office_read(zr,1,0);
1460                         /* Interrupts may still happen when
1461                          * zr->v4l_memgrab_active is switched off.
1462                          * We simply ignore them */
1463
1464                         if (zr->v4l_memgrab_active) {
1465
1466                                 /* A lot more checks should be here ... */
1467                                 if ((btread(ZR36057_VSSFGR) &
1468                                      ZR36057_VSSFGR_SnapShot) == 0)
1469                                         dprintk(1,
1470                                                 KERN_WARNING
1471                                                 "%s: BuzIRQ with SnapShot off ???\n",
1472                                                 ZR_DEVNAME(zr));
1473
1474                                 if (zr->v4l_grab_frame != NO_GRAB_ACTIVE) {
1475                                         /* There is a grab on a frame going on, check if it has finished */
1476
1477                                         if ((btread(ZR36057_VSSFGR) &
1478                                              ZR36057_VSSFGR_FrameGrab) ==
1479                                             0) {
1480                                                 /* it is finished, notify the user */
1481
1482                                                 zr->v4l_buffers.buffer[zr->v4l_grab_frame].state = BUZ_STATE_DONE;
1483                                                 zr->v4l_buffers.buffer[zr->v4l_grab_frame].bs.seq = zr->v4l_grab_seq;
1484                                                 do_gettimeofday(&zr->v4l_buffers.buffer[zr->v4l_grab_frame].bs.timestamp);
1485                                                 zr->v4l_grab_frame = NO_GRAB_ACTIVE;
1486                                                 zr->v4l_pend_tail++;
1487                                         }
1488                                 }
1489
1490                                 if (zr->v4l_grab_frame == NO_GRAB_ACTIVE)
1491                                         wake_up_interruptible(&zr->v4l_capq);
1492
1493                                 /* Check if there is another grab queued */
1494
1495                                 if (zr->v4l_grab_frame == NO_GRAB_ACTIVE &&
1496                                     zr->v4l_pend_tail != zr->v4l_pend_head) {
1497
1498                                         int frame = zr->v4l_pend[zr->v4l_pend_tail &
1499                                                          V4L_MASK_FRAME];
1500                                         u32 reg;
1501
1502                                         zr->v4l_grab_frame = frame;
1503
1504                                         /* Set zr36057 video front end and enable video */
1505
1506                                         /* Buffer address */
1507
1508                                         reg =
1509                                             zr->v4l_buffers.buffer[frame].
1510                                             fbuffer_bus;
1511                                         btwrite(reg, ZR36057_VDTR);
1512                                         if (zr->v4l_settings.height >
1513                                             BUZ_MAX_HEIGHT / 2)
1514                                                 reg +=
1515                                                     zr->v4l_settings.
1516                                                     bytesperline;
1517                                         btwrite(reg, ZR36057_VDBR);
1518
1519                                         /* video stride, status, and frame grab register */
1520                                         reg = 0;
1521                                         if (zr->v4l_settings.height >
1522                                             BUZ_MAX_HEIGHT / 2)
1523                                                 reg +=
1524                                                     zr->v4l_settings.
1525                                                     bytesperline;
1526                                         reg =
1527                                             (reg <<
1528                                              ZR36057_VSSFGR_DispStride);
1529                                         reg |= ZR36057_VSSFGR_VidOvf;
1530                                         reg |= ZR36057_VSSFGR_SnapShot;
1531                                         reg |= ZR36057_VSSFGR_FrameGrab;
1532                                         btwrite(reg, ZR36057_VSSFGR);
1533
1534                                         btor(ZR36057_VDCR_VidEn,
1535                                              ZR36057_VDCR);
1536                                 }
1537                         }
1538
1539                         /* even if we don't grab, we do want to increment
1540                          * the sequence counter to see lost frames */
1541                         zr->v4l_grab_seq++;
1542                 }
1543 #if (IRQ_MASK & ZR36057_ISR_CodRepIRQ)
1544                 if (astat & ZR36057_ISR_CodRepIRQ) {
1545                         zr->intr_counter_CodRepIRQ++;
1546                         IDEBUG(printk
1547                                (KERN_DEBUG "%s: ZR36057_ISR_CodRepIRQ\n",
1548                                 ZR_DEVNAME(zr)));
1549                         btand(~ZR36057_ICR_CodRepIRQ, ZR36057_ICR);
1550                 }
1551 #endif                          /* (IRQ_MASK & ZR36057_ISR_CodRepIRQ) */
1552
1553 #if (IRQ_MASK & ZR36057_ISR_JPEGRepIRQ)
1554                 if (astat & ZR36057_ISR_JPEGRepIRQ) {
1555
1556                         if (zr->codec_mode == BUZ_MODE_MOTION_DECOMPRESS ||
1557                             zr->codec_mode == BUZ_MODE_MOTION_COMPRESS) {
1558                                 if (*zr_debug > 1 &&
1559                                     (!zr->frame_num || zr->JPEG_error)) {
1560                                         printk(KERN_INFO
1561                                                "%s: first frame ready: state=0x%08x odd_even=%d field_per_buff=%d delay=%d\n",
1562                                                ZR_DEVNAME(zr), stat,
1563                                                zr->jpg_settings.odd_even,
1564                                                zr->jpg_settings.
1565                                                field_per_buff,
1566                                                zr->JPEG_missed);
1567                                         {
1568                                                 char sc[] = "0000";
1569                                                 char sv[5];
1570                                                 int i;
1571                                                 strcpy(sv, sc);
1572                                                 for (i = 0; i < 4; i++) {
1573                                                         if (le32_to_cpu(zr->stat_com[i]) & 1)
1574                                                                 sv[i] = '1';
1575                                                 }
1576                                                 sv[4] = 0;
1577                                                 printk(KERN_INFO
1578                                                        "%s: stat_com=%s queue_state=%ld/%ld/%ld/%ld\n",
1579                                                        ZR_DEVNAME(zr), sv,
1580                                                        zr->jpg_que_tail,
1581                                                        zr->jpg_dma_tail,
1582                                                        zr->jpg_dma_head,
1583                                                        zr->jpg_que_head);
1584                                         }
1585                                 } else {
1586                                         if (zr->JPEG_missed > zr->JPEG_max_missed)      // Get statistics
1587                                                 zr->JPEG_max_missed =
1588                                                     zr->JPEG_missed;
1589                                         if (zr->JPEG_missed <
1590                                             zr->JPEG_min_missed)
1591                                                 zr->JPEG_min_missed =
1592                                                     zr->JPEG_missed;
1593                                 }
1594
1595                                 if (*zr_debug > 2 && zr->frame_num < 6) {
1596                                         int i;
1597                                         printk("%s: seq=%ld stat_com:",
1598                                                ZR_DEVNAME(zr), zr->jpg_seq_num);
1599                                         for (i = 0; i < 4; i++) {
1600                                                 printk(" %08x",
1601                                                        le32_to_cpu(zr->stat_com[i]));
1602                                         }
1603                                         printk("\n");
1604                                 }
1605                                 zr->frame_num++;
1606                                 zr->JPEG_missed = 0;
1607                                 zr->JPEG_error = 0;
1608                                 zoran_reap_stat_com(zr);
1609                                 zoran_feed_stat_com(zr);
1610                                 wake_up_interruptible(&zr->jpg_capq);
1611                         } /*else {
1612                               dprintk(1,
1613                                         KERN_ERR
1614                                         "%s: JPEG interrupt while not in motion (de)compress mode!\n",
1615                                         ZR_DEVNAME(zr));
1616                         }*/
1617                 }
1618 #endif                          /* (IRQ_MASK & ZR36057_ISR_JPEGRepIRQ) */
1619
1620                 /* DATERR, too many fields missed, error processing */
1621                 if ((astat & zr->card.jpeg_int) ||
1622                     zr->JPEG_missed > 25 ||
1623                     zr->JPEG_error == 1 ||
1624                     ((zr->codec_mode == BUZ_MODE_MOTION_DECOMPRESS) &&
1625                      (zr->frame_num & (zr->JPEG_missed >
1626                                        zr->jpg_settings.field_per_buff)))) {
1627                         error_handler(zr, astat, stat);
1628                 }
1629
1630                 count++;
1631                 if (count > 10) {
1632                         dprintk(2, KERN_WARNING "%s: irq loop %d\n",
1633                                 ZR_DEVNAME(zr), count);
1634                         if (count > 20) {
1635                                 btand(~ZR36057_ICR_IntPinEn, ZR36057_ICR);
1636                                 dprintk(2,
1637                                         KERN_ERR
1638                                         "%s: IRQ lockup, cleared int mask\n",
1639                                         ZR_DEVNAME(zr));
1640                                 break;
1641                         }
1642                 }
1643                 zr->last_isr = stat;
1644         }
1645         spin_unlock_irqrestore(&zr->spinlock, flags);
1646
1647         return IRQ_HANDLED;
1648 }
1649
1650 void
1651 zoran_set_pci_master (struct zoran *zr,
1652                       int           set_master)
1653 {
1654         if (set_master) {
1655                 pci_set_master(zr->pci_dev);
1656         } else {
1657                 u16 command;
1658
1659                 pci_read_config_word(zr->pci_dev, PCI_COMMAND, &command);
1660                 command &= ~PCI_COMMAND_MASTER;
1661                 pci_write_config_word(zr->pci_dev, PCI_COMMAND, command);
1662         }
1663 }
1664
1665 void
1666 zoran_init_hardware (struct zoran *zr)
1667 {
1668         int j, zero = 0;
1669
1670         /* Enable bus-mastering */
1671         zoran_set_pci_master(zr, 1);
1672
1673         /* Initialize the board */
1674         if (zr->card.init) {
1675                 zr->card.init(zr);
1676         }
1677
1678         j = zr->card.input[zr->input].muxsel;
1679
1680         decoder_command(zr, 0, NULL);
1681         decoder_command(zr, DECODER_SET_NORM, &zr->norm);
1682         decoder_command(zr, DECODER_SET_INPUT, &j);
1683
1684         encoder_command(zr, 0, NULL);
1685         encoder_command(zr, ENCODER_SET_NORM, &zr->norm);
1686         encoder_command(zr, ENCODER_SET_INPUT, &zero);
1687
1688         /* toggle JPEG codec sleep to sync PLL */
1689         jpeg_codec_sleep(zr, 1);
1690         jpeg_codec_sleep(zr, 0);
1691
1692         /* set individual interrupt enables (without GIRQ1)
1693          * but don't global enable until zoran_open() */
1694
1695         //btwrite(IRQ_MASK & ~ZR36057_ISR_GIRQ1, ZR36057_ICR);  // SW
1696         // It looks like using only JPEGRepIRQEn is not always reliable,
1697         // may be when JPEG codec crashes it won't generate IRQ? So,
1698          /*CP*/                 //        btwrite(IRQ_MASK, ZR36057_ICR); // Enable Vsync interrupts too. SM    WHY ? LP
1699             zr36057_init_vfe(zr);
1700
1701         zr36057_enable_jpg(zr, BUZ_MODE_IDLE);
1702
1703         btwrite(IRQ_MASK, ZR36057_ISR); // Clears interrupts
1704 }
1705
1706 void
1707 zr36057_restart (struct zoran *zr)
1708 {
1709         btwrite(0, ZR36057_SPGPPCR);
1710         mdelay(1);
1711         btor(ZR36057_SPGPPCR_SoftReset, ZR36057_SPGPPCR);
1712         mdelay(1);
1713
1714         /* assert P_Reset */
1715         btwrite(0, ZR36057_JPC);
1716         /* set up GPIO direction - all output */
1717         btwrite(ZR36057_SPGPPCR_SoftReset | 0, ZR36057_SPGPPCR);
1718
1719         /* set up GPIO pins and guest bus timing */
1720         btwrite((0x81 << 24) | 0x8888, ZR36057_GPPGCR1);
1721 }
1722
1723 /*
1724  * initialize video front end
1725  */
1726
1727 static void
1728 zr36057_init_vfe (struct zoran *zr)
1729 {
1730         u32 reg;
1731
1732         reg = btread(ZR36057_VFESPFR);
1733         reg |= ZR36057_VFESPFR_LittleEndian;
1734         reg &= ~ZR36057_VFESPFR_VCLKPol;
1735         reg |= ZR36057_VFESPFR_ExtFl;
1736         reg |= ZR36057_VFESPFR_TopField;
1737         btwrite(reg, ZR36057_VFESPFR);
1738         reg = btread(ZR36057_VDCR);
1739         if (pci_pci_problems & PCIPCI_TRITON)
1740                 // || zr->revision < 1) // Revision 1 has also Triton support
1741                 reg &= ~ZR36057_VDCR_Triton;
1742         else
1743                 reg |= ZR36057_VDCR_Triton;
1744         btwrite(reg, ZR36057_VDCR);
1745 }
1746
1747 /*
1748  * Interface to decoder and encoder chips using i2c bus
1749  */
1750
1751 int
1752 decoder_command (struct zoran *zr,
1753                  int           cmd,
1754                  void         *data)
1755 {
1756         if (zr->decoder == NULL)
1757                 return -EIO;
1758
1759         if (zr->card.type == LML33 &&
1760             (cmd == DECODER_SET_NORM || DECODER_SET_INPUT)) {
1761                 int res;
1762
1763                 // Bt819 needs to reset its FIFO buffer using #FRST pin and
1764                 // LML33 card uses GPIO(7) for that.
1765                 GPIO(zr, 7, 0);
1766                 res = zr->decoder->driver->command(zr->decoder, cmd, data);
1767                 // Pull #FRST high.
1768                 GPIO(zr, 7, 1);
1769                 return res;
1770         } else
1771                 return zr->decoder->driver->command(zr->decoder, cmd,
1772                                                     data);
1773 }
1774
1775 int
1776 encoder_command (struct zoran *zr,
1777                  int           cmd,
1778                  void         *data)
1779 {
1780         if (zr->encoder == NULL)
1781                 return -1;
1782
1783         return zr->encoder->driver->command(zr->encoder, cmd, data);
1784 }