git.oblomov.eu Git - linux-2.6/blob - drivers/media/video/zoran/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
  35 #include <linux/interrupt.h>
  36 #include <linux/proc_fs.h>
  37 #include <linux/i2c.h>
  38 #include <linux/i2c-algo-bit.h>
  39 #include <linux/videodev.h>
  40 #include <linux/spinlock.h>
  41 #include <linux/sem.h>
  42
  43 #include <linux/pci.h>
  44 #include <linux/video_decoder.h>
  45 #include <linux/video_encoder.h>
  46 #include <linux/delay.h>
  47 #include <linux/wait.h>
  48
  49 #include <asm/byteorder.h>
  50 #include <asm/io.h>
  51
  52 #include "videocodec.h"
  53 #include "zoran.h"
  54 #include "zoran_device.h"
  55 #include "zoran_card.h"
  56
  57 #define IRQ_MASK ( ZR36057_ISR_GIRQ0 | \
  58                    ZR36057_ISR_GIRQ1 | \
  59                    ZR36057_ISR_JPEGRepIRQ )
  60
  61 static int lml33dpath;          /* default = 0
  62                                  * 1 will use digital path in capture
  63                                  * mode instead of analog. It can be
  64                                  * used for picture adjustments using
  65                                  * tool like xawtv while watching image
  66                                  * on TV monitor connected to the output.
  67                                  * However, due to absence of 75 Ohm
  68                                  * load on Bt819 input, there will be
  69                                  * some image imperfections */
  70
  71 module_param(lml33dpath, bool, 0644);
  72 MODULE_PARM_DESC(lml33dpath,
  73                  "Use digital path capture mode (on LML33 cards)");
  74
  75 static void
  76 zr36057_init_vfe (struct zoran *zr);
  77
  78 /*
  79  * General Purpose I/O and Guest bus access
  80  */
  81
  82 /*
  83  * This is a bit tricky. When a board lacks a GPIO function, the corresponding
  84  * GPIO bit number in the card_info structure is set to 0.
  85  */
  86
  87 void
  88 GPIO (struct zoran *zr,
  89       int           bit,
  90       unsigned int  value)
  91 {
  92         u32 reg;
  93         u32 mask;
  94
  95         /* Make sure the bit number is legal
  96          * A bit number of -1 (lacking) gives a mask of 0,
  97          * making it harmless */
  98         mask = (1 << (24 + bit)) & 0xff000000;
  99         reg = btread(ZR36057_GPPGCR1) & ~mask;
 100         if (value) {
 101                 reg |= mask;
 102         }
 103         btwrite(reg, ZR36057_GPPGCR1);
 104         udelay(1);
 105 }
 106
 107 /*
 108  * Wait til post office is no longer busy
 109  */
 110
 111 int
 112 post_office_wait (struct zoran *zr)
 113 {
 114         u32 por;
 115
 116 //      while (((por = btread(ZR36057_POR)) & (ZR36057_POR_POPen | ZR36057_POR_POTime)) == ZR36057_POR_POPen) {
 117         while ((por = btread(ZR36057_POR)) & ZR36057_POR_POPen) {
 118                 /* wait for something to happen */
 119         }
 120         if ((por & ZR36057_POR_POTime) && !zr->card.gws_not_connected) {
 121                 /* In LML33/BUZ \GWS line is not connected, so it has always timeout set */
 122                 dprintk(1, KERN_INFO "%s: pop timeout %08x\n", ZR_DEVNAME(zr),
 123                         por);
 124                 return -1;
 125         }
 126
 127         return 0;
 128 }
 129
 130 int
 131 post_office_write (struct zoran *zr,
 132                    unsigned int  guest,
 133                    unsigned int  reg,
 134                    unsigned int  value)
 135 {
 136         u32 por;
 137
 138         por =
 139             ZR36057_POR_PODir | ZR36057_POR_POTime | ((guest & 7) << 20) |
 140             ((reg & 7) << 16) | (value & 0xFF);
 141         btwrite(por, ZR36057_POR);
 142
 143         return post_office_wait(zr);
 144 }
 145
 146 int
 147 post_office_read (struct zoran *zr,
 148                   unsigned int  guest,
 149                   unsigned int  reg)
 150 {
 151         u32 por;
 152
 153         por = ZR36057_POR_POTime | ((guest & 7) << 20) | ((reg & 7) << 16);
 154         btwrite(por, ZR36057_POR);
 155         if (post_office_wait(zr) < 0) {
 156                 return -1;
 157         }
 158
 159         return btread(ZR36057_POR) & 0xFF;
 160 }
 161
 162 /*
 163  * detect guests
 164  */
 165
 166 static void
 167 dump_guests (struct zoran *zr)
 168 {
 169         if (zr36067_debug > 2) {
 170                 int i, guest[8];
 171
 172                 for (i = 1; i < 8; i++) {       // Don't read jpeg codec here
 173                         guest[i] = post_office_read(zr, i, 0);
 174                 }
 175
 176                 printk(KERN_INFO "%s: Guests:", ZR_DEVNAME(zr));
 177
 178                 for (i = 1; i < 8; i++) {
 179                         printk(" 0x%02x", guest[i]);
 180                 }
 181                 printk("\n");
 182         }
 183 }
 184
 185 static inline unsigned long
 186 get_time (void)
 187 {
 188         struct timeval tv;
 189
 190         do_gettimeofday(&tv);
 191         return (1000000 * tv.tv_sec + tv.tv_usec);
 192 }
 193
 194 void
 195 detect_guest_activity (struct zoran *zr)
 196 {
 197         int timeout, i, j, res, guest[8], guest0[8], change[8][3];
 198         unsigned long t0, t1;
 199
 200         dump_guests(zr);
 201         printk(KERN_INFO "%s: Detecting guests activity, please wait...\n",
 202                ZR_DEVNAME(zr));
 203         for (i = 1; i < 8; i++) {       // Don't read jpeg codec here
 204                 guest0[i] = guest[i] = post_office_read(zr, i, 0);
 205         }
 206
 207         timeout = 0;
 208         j = 0;
 209         t0 = get_time();
 210         while (timeout < 10000) {
 211                 udelay(10);
 212                 timeout++;
 213                 for (i = 1; (i < 8) && (j < 8); i++) {
 214                         res = post_office_read(zr, i, 0);
 215                         if (res != guest[i]) {
 216                                 t1 = get_time();
 217                                 change[j][0] = (t1 - t0);
 218                                 t0 = t1;
 219                                 change[j][1] = i;
 220                                 change[j][2] = res;
 221                                 j++;
 222                                 guest[i] = res;
 223                         }
 224                 }
 225                 if (j >= 8)
 226                         break;
 227         }
 228         printk(KERN_INFO "%s: Guests:", ZR_DEVNAME(zr));
 229
 230         for (i = 1; i < 8; i++) {
 231                 printk(" 0x%02x", guest0[i]);
 232         }
 233         printk("\n");
 234         if (j == 0) {
 235                 printk(KERN_INFO "%s: No activity detected.\n", ZR_DEVNAME(zr));
 236                 return;
 237         }
 238         for (i = 0; i < j; i++) {
 239                 printk(KERN_INFO "%s: %6d: %d => 0x%02x\n", ZR_DEVNAME(zr),
 240                        change[i][0], change[i][1], change[i][2]);
 241         }
 242 }
 243
 244 /*
 245  * JPEG Codec access
 246  */
 247
 248 void
 249 jpeg_codec_sleep (struct zoran *zr,
 250                   int           sleep)
 251 {
 252         GPIO(zr, zr->card.gpio[ZR_GPIO_JPEG_SLEEP], !sleep);
 253         if (!sleep) {
 254                 dprintk(3,
 255                         KERN_DEBUG
 256                         "%s: jpeg_codec_sleep() - wake GPIO=0x%08x\n",
 257                         ZR_DEVNAME(zr), btread(ZR36057_GPPGCR1));
 258                 udelay(500);
 259         } else {
 260                 dprintk(3,
 261                         KERN_DEBUG
 262                         "%s: jpeg_codec_sleep() - sleep GPIO=0x%08x\n",
 263                         ZR_DEVNAME(zr), btread(ZR36057_GPPGCR1));
 264                 udelay(2);
 265         }
 266 }
 267
 268 int
 269 jpeg_codec_reset (struct zoran *zr)
 270 {
 271         /* Take the codec out of sleep */
 272         jpeg_codec_sleep(zr, 0);
 273
 274         if (zr->card.gpcs[GPCS_JPEG_RESET] != 0xff) {
 275                 post_office_write(zr, zr->card.gpcs[GPCS_JPEG_RESET], 0,
 276                                   0);
 277                 udelay(2);
 278         } else {
 279                 GPIO(zr, zr->card.gpio[ZR_GPIO_JPEG_RESET], 0);
 280                 udelay(2);
 281                 GPIO(zr, zr->card.gpio[ZR_GPIO_JPEG_RESET], 1);
 282                 udelay(2);
 283         }
 284
 285         return 0;
 286 }
 287
 288 /*
 289  *   Set the registers for the size we have specified. Don't bother
 290  *   trying to understand this without the ZR36057 manual in front of
 291  *   you [AC].
 292  *
 293  *   PS: The manual is free for download in .pdf format from
 294  *   www.zoran.com - nicely done those folks.
 295  */
 296
 297 static void
 298 zr36057_adjust_vfe (struct zoran          *zr,
 299                     enum zoran_codec_mode  mode)
 300 {
 301         u32 reg;
 302
 303         switch (mode) {
 304         case BUZ_MODE_MOTION_DECOMPRESS:
 305                 btand(~ZR36057_VFESPFR_ExtFl, ZR36057_VFESPFR);
 306                 reg = btread(ZR36057_VFEHCR);
 307                 if ((reg & (1 << 10)) && zr->card.type != LML33R10) {
 308                         reg += ((1 << 10) | 1);
 309                 }
 310                 btwrite(reg, ZR36057_VFEHCR);
 311                 break;
 312         case BUZ_MODE_MOTION_COMPRESS:
 313         case BUZ_MODE_IDLE:
 314         default:
 315                 if (zr->norm == VIDEO_MODE_NTSC ||
 316                     (zr->card.type == LML33R10 &&
 317                      zr->norm == VIDEO_MODE_PAL))
 318                         btand(~ZR36057_VFESPFR_ExtFl, ZR36057_VFESPFR);
 319                 else
 320                         btor(ZR36057_VFESPFR_ExtFl, ZR36057_VFESPFR);
 321                 reg = btread(ZR36057_VFEHCR);
 322                 if (!(reg & (1 << 10)) && zr->card.type != LML33R10) {
 323                         reg -= ((1 << 10) | 1);
 324                 }
 325                 btwrite(reg, ZR36057_VFEHCR);
 326                 break;
 327         }
 328 }
 329
 330 /*
 331  * set geometry
 332  */
 333
 334 static void
 335 zr36057_set_vfe (struct zoran              *zr,
 336                  int                        video_width,
 337                  int                        video_height,
 338                  const struct zoran_format *format)
 339 {
 340         struct tvnorm *tvn;
 341         unsigned HStart, HEnd, VStart, VEnd;
 342         unsigned DispMode;
 343         unsigned VidWinWid, VidWinHt;
 344         unsigned hcrop1, hcrop2, vcrop1, vcrop2;
 345         unsigned Wa, We, Ha, He;
 346         unsigned X, Y, HorDcm, VerDcm;
 347         u32 reg;
 348         unsigned mask_line_size;
 349
 350         tvn = zr->timing;
 351
 352         Wa = tvn->Wa;
 353         Ha = tvn->Ha;
 354
 355         dprintk(2, KERN_INFO "%s: set_vfe() - width = %d, height = %d\n",
 356                 ZR_DEVNAME(zr), video_width, video_height);
 357
 358         if (zr->norm != VIDEO_MODE_PAL &&
 359             zr->norm != VIDEO_MODE_NTSC &&
 360             zr->norm != VIDEO_MODE_SECAM) {
 361                 dprintk(1,
 362                         KERN_ERR "%s: set_vfe() - norm = %d not valid\n",
 363                         ZR_DEVNAME(zr), zr->norm);
 364                 return;
 365         }
 366         if (video_width < BUZ_MIN_WIDTH ||
 367             video_height < BUZ_MIN_HEIGHT ||
 368             video_width > Wa || video_height > Ha) {
 369                 dprintk(1, KERN_ERR "%s: set_vfe: w=%d h=%d not valid\n",
 370                         ZR_DEVNAME(zr), video_width, video_height);
 371                 return;
 372         }
 373
 374         /**** zr36057 ****/
 375
 376         /* horizontal */
 377         VidWinWid = video_width;
 378         X = DIV_ROUND_UP(VidWinWid * 64, tvn->Wa);
 379         We = (VidWinWid * 64) / X;
 380         HorDcm = 64 - X;
 381         hcrop1 = 2 * ((tvn->Wa - We) / 4);
 382         hcrop2 = tvn->Wa - We - hcrop1;
 383         HStart = tvn->HStart ? tvn->HStart : 1;
 384         /* (Ronald) Original comment:
 385          * "| 1 Doesn't have any effect, tested on both a DC10 and a DC10+"
 386          * this is false. It inverses chroma values on the LML33R10 (so Cr
 387          * suddenly is shown as Cb and reverse, really cool effect if you
 388          * want to see blue faces, not useful otherwise). So don't use |1.
 389          * However, the DC10 has '0' as HStart, but does need |1, so we
 390          * use a dirty check...
 391          */
 392         HEnd = HStart + tvn->Wa - 1;
 393         HStart += hcrop1;
 394         HEnd -= hcrop2;
 395         reg = ((HStart & ZR36057_VFEHCR_Hmask) << ZR36057_VFEHCR_HStart)
 396             | ((HEnd & ZR36057_VFEHCR_Hmask) << ZR36057_VFEHCR_HEnd);
 397         if (zr->card.vfe_pol.hsync_pol)
 398                 reg |= ZR36057_VFEHCR_HSPol;
 399         btwrite(reg, ZR36057_VFEHCR);
 400
 401         /* Vertical */
 402         DispMode = !(video_height > BUZ_MAX_HEIGHT / 2);
 403         VidWinHt = DispMode ? video_height : video_height / 2;
 404         Y = DIV_ROUND_UP(VidWinHt * 64 * 2, tvn->Ha);
 405         He = (VidWinHt * 64) / Y;
 406         VerDcm = 64 - Y;
 407         vcrop1 = (tvn->Ha / 2 - He) / 2;
 408         vcrop2 = tvn->Ha / 2 - He - vcrop1;
 409         VStart = tvn->VStart;
 410         VEnd = VStart + tvn->Ha / 2;    // - 1; FIXME SnapShot times out with -1 in 768*576 on the DC10 - LP
 411         VStart += vcrop1;
 412         VEnd -= vcrop2;
 413         reg = ((VStart & ZR36057_VFEVCR_Vmask) << ZR36057_VFEVCR_VStart)
 414             | ((VEnd & ZR36057_VFEVCR_Vmask) << ZR36057_VFEVCR_VEnd);
 415         if (zr->card.vfe_pol.vsync_pol)
 416                 reg |= ZR36057_VFEVCR_VSPol;
 417         btwrite(reg, ZR36057_VFEVCR);
 418
 419         /* scaler and pixel format */
 420         reg = 0;
 421         reg |= (HorDcm << ZR36057_VFESPFR_HorDcm);
 422         reg |= (VerDcm << ZR36057_VFESPFR_VerDcm);
 423         reg |= (DispMode << ZR36057_VFESPFR_DispMode);
 424         /* RJ: I don't know, why the following has to be the opposite
 425          * of the corresponding ZR36060 setting, but only this way
 426          * we get the correct colors when uncompressing to the screen  */
 427         //reg |= ZR36057_VFESPFR_VCLKPol; /**/
 428         /* RJ: Don't know if that is needed for NTSC also */
 429         if (zr->norm != VIDEO_MODE_NTSC)
 430                 reg |= ZR36057_VFESPFR_ExtFl;   // NEEDED!!!!!!! Wolfgang
 431         reg |= ZR36057_VFESPFR_TopField;
 432         if (HorDcm >= 48) {
 433                 reg |= 3 << ZR36057_VFESPFR_HFilter;    /* 5 tap filter */
 434         } else if (HorDcm >= 32) {
 435                 reg |= 2 << ZR36057_VFESPFR_HFilter;    /* 4 tap filter */
 436         } else if (HorDcm >= 16) {
 437                 reg |= 1 << ZR36057_VFESPFR_HFilter;    /* 3 tap filter */
 438         }
 439         reg |= format->vfespfr;
 440         btwrite(reg, ZR36057_VFESPFR);
 441
 442         /* display configuration */
 443         reg = (16 << ZR36057_VDCR_MinPix)
 444             | (VidWinHt << ZR36057_VDCR_VidWinHt)
 445             | (VidWinWid << ZR36057_VDCR_VidWinWid);
 446         if (pci_pci_problems & PCIPCI_TRITON)
 447                 // || zr->revision < 1) // Revision 1 has also Triton support
 448                 reg &= ~ZR36057_VDCR_Triton;
 449         else
 450                 reg |= ZR36057_VDCR_Triton;
 451         btwrite(reg, ZR36057_VDCR);
 452
 453         /* (Ronald) don't write this if overlay_mask = NULL */
 454         if (zr->overlay_mask) {
 455                 /* Write overlay clipping mask data, but don't enable overlay clipping */
 456                 /* RJ: since this makes only sense on the screen, we use
 457                  * zr->overlay_settings.width instead of video_width */
 458
 459                 mask_line_size = (BUZ_MAX_WIDTH + 31) / 32;
 460                 reg = virt_to_bus(zr->overlay_mask);
 461                 btwrite(reg, ZR36057_MMTR);
 462                 reg = virt_to_bus(zr->overlay_mask + mask_line_size);
 463                 btwrite(reg, ZR36057_MMBR);
 464                 reg =
 465                     mask_line_size - (zr->overlay_settings.width +
 466                                       31) / 32;
 467                 if (DispMode == 0)
 468                         reg += mask_line_size;
 469                 reg <<= ZR36057_OCR_MaskStride;
 470                 btwrite(reg, ZR36057_OCR);
 471         }
 472
 473         zr36057_adjust_vfe(zr, zr->codec_mode);
 474 }
 475
 476 /*
 477  * Switch overlay on or off
 478  */
 479
 480 void
 481 zr36057_overlay (struct zoran *zr,
 482                  int           on)
 483 {
 484         u32 reg;
 485
 486         if (on) {
 487                 /* do the necessary settings ... */
 488                 btand(~ZR36057_VDCR_VidEn, ZR36057_VDCR);       /* switch it off first */
 489
 490                 zr36057_set_vfe(zr,
 491                                 zr->overlay_settings.width,
 492                                 zr->overlay_settings.height,
 493                                 zr->overlay_settings.format);
 494
 495                 /* Start and length of each line MUST be 4-byte aligned.
 496                  * This should be allready checked before the call to this routine.
 497                  * All error messages are internal driver checking only! */
 498
 499                 /* video display top and bottom registers */
 500                 reg = (long) zr->buffer.base +
 501                     zr->overlay_settings.x *
 502                     ((zr->overlay_settings.format->depth + 7) / 8) +
 503                     zr->overlay_settings.y *
 504                     zr->buffer.bytesperline;
 505                 btwrite(reg, ZR36057_VDTR);
 506                 if (reg & 3)
 507                         dprintk(1,
 508                                 KERN_ERR
 509                                 "%s: zr36057_overlay() - video_address not aligned\n",
 510                                 ZR_DEVNAME(zr));
 511                 if (zr->overlay_settings.height > BUZ_MAX_HEIGHT / 2)
 512                         reg += zr->buffer.bytesperline;
 513                 btwrite(reg, ZR36057_VDBR);
 514
 515                 /* video stride, status, and frame grab register */
 516                 reg = zr->buffer.bytesperline -
 517                     zr->overlay_settings.width *
 518                     ((zr->overlay_settings.format->depth + 7) / 8);
 519                 if (zr->overlay_settings.height > BUZ_MAX_HEIGHT / 2)
 520                         reg += zr->buffer.bytesperline;
 521                 if (reg & 3)
 522                         dprintk(1,
 523                                 KERN_ERR
 524                                 "%s: zr36057_overlay() - video_stride not aligned\n",
 525                                 ZR_DEVNAME(zr));
 526                 reg = (reg << ZR36057_VSSFGR_DispStride);
 527                 reg |= ZR36057_VSSFGR_VidOvf;   /* clear overflow status */
 528                 btwrite(reg, ZR36057_VSSFGR);
 529
 530                 /* Set overlay clipping */
 531                 if (zr->overlay_settings.clipcount > 0)
 532                         btor(ZR36057_OCR_OvlEnable, ZR36057_OCR);
 533
 534                 /* ... and switch it on */
 535                 btor(ZR36057_VDCR_VidEn, ZR36057_VDCR);
 536         } else {
 537                 /* Switch it off */
 538                 btand(~ZR36057_VDCR_VidEn, ZR36057_VDCR);
 539         }
 540 }
 541
 542 /*
 543  * The overlay mask has one bit for each pixel on a scan line,
 544  *  and the maximum window size is BUZ_MAX_WIDTH * BUZ_MAX_HEIGHT pixels.
 545  */
 546
 547 void
 548 write_overlay_mask (struct file       *file,
 549                     struct video_clip *vp,
 550                     int                count)
 551 {
 552         struct zoran_fh *fh = file->private_data;
 553         struct zoran *zr = fh->zr;
 554         unsigned mask_line_size = (BUZ_MAX_WIDTH + 31) / 32;
 555         u32 *mask;
 556         int x, y, width, height;
 557         unsigned i, j, k;
 558         u32 reg;
 559
 560         /* fill mask with one bits */
 561         memset(fh->overlay_mask, ~0, mask_line_size * 4 * BUZ_MAX_HEIGHT);
 562         reg = 0;
 563
 564         for (i = 0; i < count; ++i) {
 565                 /* pick up local copy of clip */
 566                 x = vp[i].x;
 567                 y = vp[i].y;
 568                 width = vp[i].width;
 569                 height = vp[i].height;
 570
 571                 /* trim clips that extend beyond the window */
 572                 if (x < 0) {
 573                         width += x;
 574                         x = 0;
 575                 }
 576                 if (y < 0) {
 577                         height += y;
 578                         y = 0;
 579                 }
 580                 if (x + width > fh->overlay_settings.width) {
 581                         width = fh->overlay_settings.width - x;
 582                 }
 583                 if (y + height > fh->overlay_settings.height) {
 584                         height = fh->overlay_settings.height - y;
 585                 }
 586
 587                 /* ignore degenerate clips */
 588                 if (height <= 0) {
 589                         continue;
 590                 }
 591                 if (width <= 0) {
 592                         continue;
 593                 }
 594
 595                 /* apply clip for each scan line */
 596                 for (j = 0; j < height; ++j) {
 597                         /* reset bit for each pixel */
 598                         /* this can be optimized later if need be */
 599                         mask = fh->overlay_mask + (y + j) * mask_line_size;
 600                         for (k = 0; k < width; ++k) {
 601                                 mask[(x + k) / 32] &=
 602                                     ~((u32) 1 << (x + k) % 32);
 603                         }
 604                 }
 605         }
 606 }
 607
 608 /* Enable/Disable uncompressed memory grabbing of the 36057 */
 609
 610 void
 611 zr36057_set_memgrab (struct zoran *zr,
 612                      int           mode)
 613 {
 614         if (mode) {
 615                 /* We only check SnapShot and not FrameGrab here.  SnapShot==1
 616                  * means a capture is already in progress, but FrameGrab==1
 617                  * doesn't necessary mean that.  It's more correct to say a 1
 618                  * to 0 transition indicates a capture completed.  If a
 619                  * capture is pending when capturing is tuned off, FrameGrab
 620                  * will be stuck at 1 until capturing is turned back on.
 621                  */
 622                 if (btread(ZR36057_VSSFGR) & ZR36057_VSSFGR_SnapShot)
 623                         dprintk(1,
 624                                 KERN_WARNING
 625                                 "%s: zr36057_set_memgrab(1) with SnapShot on!?\n",
 626                                 ZR_DEVNAME(zr));
 627
 628                 /* switch on VSync interrupts */
 629                 btwrite(IRQ_MASK, ZR36057_ISR); // Clear Interrupts
 630                 btor(zr->card.vsync_int, ZR36057_ICR);  // SW
 631
 632                 /* enable SnapShot */
 633                 btor(ZR36057_VSSFGR_SnapShot, ZR36057_VSSFGR);
 634
 635                 /* Set zr36057 video front end  and enable video */
 636                 zr36057_set_vfe(zr, zr->v4l_settings.width,
 637                                 zr->v4l_settings.height,
 638                                 zr->v4l_settings.format);
 639
 640                 zr->v4l_memgrab_active = 1;
 641         } else {
 642                 /* switch off VSync interrupts */
 643                 btand(~zr->card.vsync_int, ZR36057_ICR);        // SW
 644
 645                 zr->v4l_memgrab_active = 0;
 646                 zr->v4l_grab_frame = NO_GRAB_ACTIVE;
 647
 648                 /* reenable grabbing to screen if it was running */
 649                 if (zr->v4l_overlay_active) {
 650                         zr36057_overlay(zr, 1);
 651                 } else {
 652                         btand(~ZR36057_VDCR_VidEn, ZR36057_VDCR);
 653                         btand(~ZR36057_VSSFGR_SnapShot, ZR36057_VSSFGR);
 654                 }
 655         }
 656 }
 657
 658 int
 659 wait_grab_pending (struct zoran *zr)
 660 {
 661         unsigned long flags;
 662
 663         /* wait until all pending grabs are finished */
 664
 665         if (!zr->v4l_memgrab_active)
 666                 return 0;
 667
 668         wait_event_interruptible(zr->v4l_capq,
 669                         (zr->v4l_pend_tail == zr->v4l_pend_head));
 670         if (signal_pending(current))
 671                 return -ERESTARTSYS;
 672
 673         spin_lock_irqsave(&zr->spinlock, flags);
 674         zr36057_set_memgrab(zr, 0);
 675         spin_unlock_irqrestore(&zr->spinlock, flags);
 676
 677         return 0;
 678 }
 679
 680 /*****************************************************************************
 681  *                                                                           *
 682  *  Set up the Buz-specific MJPEG part                                       *
 683  *                                                                           *
 684  *****************************************************************************/
 685
 686 static inline void
 687 set_frame (struct zoran *zr,
 688            int           val)
 689 {
 690         GPIO(zr, zr->card.gpio[ZR_GPIO_JPEG_FRAME], val);
 691 }
 692
 693 static void
 694 set_videobus_dir (struct zoran *zr,
 695                   int           val)
 696 {
 697         switch (zr->card.type) {
 698         case LML33:
 699         case LML33R10:
 700                 if (lml33dpath == 0)
 701                         GPIO(zr, 5, val);
 702                 else
 703                         GPIO(zr, 5, 1);
 704                 break;
 705         default:
 706                 GPIO(zr, zr->card.gpio[ZR_GPIO_VID_DIR],
 707                      zr->card.gpio_pol[ZR_GPIO_VID_DIR] ? !val : val);
 708                 break;
 709         }
 710 }
 711
 712 static void
 713 init_jpeg_queue (struct zoran *zr)
 714 {
 715         int i;
 716
 717         /* re-initialize DMA ring stuff */
 718         zr->jpg_que_head = 0;
 719         zr->jpg_dma_head = 0;
 720         zr->jpg_dma_tail = 0;
 721         zr->jpg_que_tail = 0;
 722         zr->jpg_seq_num = 0;
 723         zr->JPEG_error = 0;
 724         zr->num_errors = 0;
 725         zr->jpg_err_seq = 0;
 726         zr->jpg_err_shift = 0;
 727         zr->jpg_queued_num = 0;
 728         for (i = 0; i < zr->jpg_buffers.num_buffers; i++) {
 729                 zr->jpg_buffers.buffer[i].state = BUZ_STATE_USER;       /* nothing going on */
 730         }
 731         for (i = 0; i < BUZ_NUM_STAT_COM; i++) {
 732                 zr->stat_com[i] = cpu_to_le32(1);       /* mark as unavailable to zr36057 */
 733         }
 734 }
 735
 736 static void
 737 zr36057_set_jpg (struct zoran          *zr,
 738                  enum zoran_codec_mode  mode)
 739 {
 740         struct tvnorm *tvn;
 741         u32 reg;
 742
 743         tvn = zr->timing;
 744
 745         /* assert P_Reset, disable code transfer, deassert Active */
 746         btwrite(0, ZR36057_JPC);
 747
 748         /* MJPEG compression mode */
 749         switch (mode) {
 750
 751         case BUZ_MODE_MOTION_COMPRESS:
 752         default:
 753                 reg = ZR36057_JMC_MJPGCmpMode;
 754                 break;
 755
 756         case BUZ_MODE_MOTION_DECOMPRESS:
 757                 reg = ZR36057_JMC_MJPGExpMode;
 758                 reg |= ZR36057_JMC_SyncMstr;
 759                 /* RJ: The following is experimental - improves the output to screen */
 760                 //if(zr->jpg_settings.VFIFO_FB) reg |= ZR36057_JMC_VFIFO_FB; // No, it doesn't. SM
 761                 break;
 762
 763         case BUZ_MODE_STILL_COMPRESS:
 764                 reg = ZR36057_JMC_JPGCmpMode;
 765                 break;
 766
 767         case BUZ_MODE_STILL_DECOMPRESS:
 768                 reg = ZR36057_JMC_JPGExpMode;
 769                 break;
 770
 771         }
 772         reg |= ZR36057_JMC_JPG;
 773         if (zr->jpg_settings.field_per_buff == 1)
 774                 reg |= ZR36057_JMC_Fld_per_buff;
 775         btwrite(reg, ZR36057_JMC);
 776
 777         /* vertical */
 778         btor(ZR36057_VFEVCR_VSPol, ZR36057_VFEVCR);
 779         reg = (6 << ZR36057_VSP_VsyncSize) |
 780               (tvn->Ht << ZR36057_VSP_FrmTot);
 781         btwrite(reg, ZR36057_VSP);
 782         reg = ((zr->jpg_settings.img_y + tvn->VStart) << ZR36057_FVAP_NAY) |
 783               (zr->jpg_settings.img_height << ZR36057_FVAP_PAY);
 784         btwrite(reg, ZR36057_FVAP);
 785
 786         /* horizontal */
 787         if (zr->card.vfe_pol.hsync_pol)
 788                 btor(ZR36057_VFEHCR_HSPol, ZR36057_VFEHCR);
 789         else
 790                 btand(~ZR36057_VFEHCR_HSPol, ZR36057_VFEHCR);
 791         reg = ((tvn->HSyncStart) << ZR36057_HSP_HsyncStart) |
 792               (tvn->Wt << ZR36057_HSP_LineTot);
 793         btwrite(reg, ZR36057_HSP);
 794         reg = ((zr->jpg_settings.img_x +
 795                 tvn->HStart + 4) << ZR36057_FHAP_NAX) |
 796               (zr->jpg_settings.img_width << ZR36057_FHAP_PAX);
 797         btwrite(reg, ZR36057_FHAP);
 798
 799         /* field process parameters */
 800         if (zr->jpg_settings.odd_even)
 801                 reg = ZR36057_FPP_Odd_Even;
 802         else
 803                 reg = 0;
 804
 805         btwrite(reg, ZR36057_FPP);
 806
 807         /* Set proper VCLK Polarity, else colors will be wrong during playback */
 808         //btor(ZR36057_VFESPFR_VCLKPol, ZR36057_VFESPFR);
 809
 810         /* code base address */
 811         reg = virt_to_bus(zr->stat_com);
 812         btwrite(reg, ZR36057_JCBA);
 813
 814         /* FIFO threshold (FIFO is 160. double words) */
 815         /* NOTE: decimal values here */
 816         switch (mode) {
 817
 818         case BUZ_MODE_STILL_COMPRESS:
 819         case BUZ_MODE_MOTION_COMPRESS:
 820                 if (zr->card.type != BUZ)
 821                         reg = 140;
 822                 else
 823                         reg = 60;
 824                 break;
 825
 826         case BUZ_MODE_STILL_DECOMPRESS:
 827         case BUZ_MODE_MOTION_DECOMPRESS:
 828                 reg = 20;
 829                 break;
 830
 831         default:
 832                 reg = 80;
 833                 break;
 834
 835         }
 836         btwrite(reg, ZR36057_JCFT);
 837         zr36057_adjust_vfe(zr, mode);
 838
 839 }
 840
 841 void
 842 print_interrupts (struct zoran *zr)
 843 {
 844         int res, noerr = 0;
 845
 846         printk(KERN_INFO "%s: interrupts received:", ZR_DEVNAME(zr));
 847         if ((res = zr->field_counter) < -1 || res > 1) {
 848                 printk(" FD:%d", res);
 849         }
 850         if ((res = zr->intr_counter_GIRQ1) != 0) {
 851                 printk(" GIRQ1:%d", res);
 852                 noerr++;
 853         }
 854         if ((res = zr->intr_counter_GIRQ0) != 0) {
 855                 printk(" GIRQ0:%d", res);
 856                 noerr++;
 857         }
 858         if ((res = zr->intr_counter_CodRepIRQ) != 0) {
 859                 printk(" CodRepIRQ:%d", res);
 860                 noerr++;
 861         }
 862         if ((res = zr->intr_counter_JPEGRepIRQ) != 0) {
 863                 printk(" JPEGRepIRQ:%d", res);
 864                 noerr++;
 865         }
 866         if (zr->JPEG_max_missed) {
 867                 printk(" JPEG delays: max=%d min=%d", zr->JPEG_max_missed,
 868                        zr->JPEG_min_missed);
 869         }
 870         if (zr->END_event_missed) {
 871                 printk(" ENDs missed: %d", zr->END_event_missed);
 872         }
 873         //if (zr->jpg_queued_num) {
 874         printk(" queue_state=%ld/%ld/%ld/%ld", zr->jpg_que_tail,
 875                zr->jpg_dma_tail, zr->jpg_dma_head, zr->jpg_que_head);
 876         //}
 877         if (!noerr) {
 878                 printk(": no interrupts detected.");
 879         }
 880         printk("\n");
 881 }
 882
 883 void
 884 clear_interrupt_counters (struct zoran *zr)
 885 {
 886         zr->intr_counter_GIRQ1 = 0;
 887         zr->intr_counter_GIRQ0 = 0;
 888         zr->intr_counter_CodRepIRQ = 0;
 889         zr->intr_counter_JPEGRepIRQ = 0;
 890         zr->field_counter = 0;
 891         zr->IRQ1_in = 0;
 892         zr->IRQ1_out = 0;
 893         zr->JPEG_in = 0;
 894         zr->JPEG_out = 0;
 895         zr->JPEG_0 = 0;
 896         zr->JPEG_1 = 0;
 897         zr->END_event_missed = 0;
 898         zr->JPEG_missed = 0;
 899         zr->JPEG_max_missed = 0;
 900         zr->JPEG_min_missed = 0x7fffffff;
 901 }
 902
 903 static u32
 904 count_reset_interrupt (struct zoran *zr)
 905 {
 906         u32 isr;
 907
 908         if ((isr = btread(ZR36057_ISR) & 0x78000000)) {
 909                 if (isr & ZR36057_ISR_GIRQ1) {
 910                         btwrite(ZR36057_ISR_GIRQ1, ZR36057_ISR);
 911                         zr->intr_counter_GIRQ1++;
 912                 }
 913                 if (isr & ZR36057_ISR_GIRQ0) {
 914                         btwrite(ZR36057_ISR_GIRQ0, ZR36057_ISR);
 915                         zr->intr_counter_GIRQ0++;
 916                 }
 917                 if (isr & ZR36057_ISR_CodRepIRQ) {
 918                         btwrite(ZR36057_ISR_CodRepIRQ, ZR36057_ISR);
 919                         zr->intr_counter_CodRepIRQ++;
 920                 }
 921                 if (isr & ZR36057_ISR_JPEGRepIRQ) {
 922                         btwrite(ZR36057_ISR_JPEGRepIRQ, ZR36057_ISR);
 923                         zr->intr_counter_JPEGRepIRQ++;
 924                 }
 925         }
 926         return isr;
 927 }
 928
 929 void
 930 jpeg_start (struct zoran *zr)
 931 {
 932         int reg;
 933
 934         zr->frame_num = 0;
 935
 936         /* deassert P_reset, disable code transfer, deassert Active */
 937         btwrite(ZR36057_JPC_P_Reset, ZR36057_JPC);
 938         /* stop flushing the internal code buffer */
 939         btand(~ZR36057_MCTCR_CFlush, ZR36057_MCTCR);
 940         /* enable code transfer */
 941         btor(ZR36057_JPC_CodTrnsEn, ZR36057_JPC);
 942
 943         /* clear IRQs */
 944         btwrite(IRQ_MASK, ZR36057_ISR);
 945         /* enable the JPEG IRQs */
 946         btwrite(zr->card.jpeg_int |
 947                         ZR36057_ICR_JPEGRepIRQ |
 948                         ZR36057_ICR_IntPinEn,
 949                 ZR36057_ICR);
 950
 951         set_frame(zr, 0);       // \FRAME
 952
 953         /* set the JPEG codec guest ID */
 954         reg = (zr->card.gpcs[1] << ZR36057_JCGI_JPEGuestID) |
 955                (0 << ZR36057_JCGI_JPEGuestReg);
 956         btwrite(reg, ZR36057_JCGI);
 957
 958         if (zr->card.video_vfe == CODEC_TYPE_ZR36016 &&
 959             zr->card.video_codec == CODEC_TYPE_ZR36050) {
 960                 /* Enable processing on the ZR36016 */
 961                 if (zr->vfe)
 962                         zr36016_write(zr->vfe, 0, 1);
 963
 964                 /* load the address of the GO register in the ZR36050 latch */
 965                 post_office_write(zr, 0, 0, 0);
 966         }
 967
 968         /* assert Active */
 969         btor(ZR36057_JPC_Active, ZR36057_JPC);
 970
 971         /* enable the Go generation */
 972         btor(ZR36057_JMC_Go_en, ZR36057_JMC);
 973         udelay(30);
 974
 975         set_frame(zr, 1);       // /FRAME
 976
 977         dprintk(3, KERN_DEBUG "%s: jpeg_start\n", ZR_DEVNAME(zr));
 978 }
 979
 980 void
 981 zr36057_enable_jpg (struct zoran          *zr,
 982                     enum zoran_codec_mode  mode)
 983 {
 984         static int zero;
 985         static int one = 1;
 986         struct vfe_settings cap;
 987         int field_size =
 988             zr->jpg_buffers.buffer_size / zr->jpg_settings.field_per_buff;
 989
 990         zr->codec_mode = mode;
 991
 992         cap.x = zr->jpg_settings.img_x;
 993         cap.y = zr->jpg_settings.img_y;
 994         cap.width = zr->jpg_settings.img_width;
 995         cap.height = zr->jpg_settings.img_height;
 996         cap.decimation =
 997             zr->jpg_settings.HorDcm | (zr->jpg_settings.VerDcm << 8);
 998         cap.quality = zr->jpg_settings.jpg_comp.quality;
 999
1000         switch (mode) {
1001
1002         case BUZ_MODE_MOTION_COMPRESS: {
1003                 struct jpeg_app_marker app;
1004                 struct jpeg_com_marker com;
1005
1006                 /* In motion compress mode, the decoder output must be enabled, and
1007                  * the video bus direction set to input.
1008                  */
1009                 set_videobus_dir(zr, 0);
1010                 decoder_command(zr, DECODER_ENABLE_OUTPUT, &one);
1011                 encoder_command(zr, ENCODER_SET_INPUT, &zero);
1012
1013                 /* Take the JPEG codec and the VFE out of sleep */
1014                 jpeg_codec_sleep(zr, 0);
1015
1016                 /* set JPEG app/com marker */
1017                 app.appn = zr->jpg_settings.jpg_comp.APPn;
1018                 app.len = zr->jpg_settings.jpg_comp.APP_len;
1019                 memcpy(app.data, zr->jpg_settings.jpg_comp.APP_data, 60);
1020                 zr->codec->control(zr->codec, CODEC_S_JPEG_APP_DATA,
1021                                    sizeof(struct jpeg_app_marker), &app);
1022
1023                 com.len = zr->jpg_settings.jpg_comp.COM_len;
1024                 memcpy(com.data, zr->jpg_settings.jpg_comp.COM_data, 60);
1025                 zr->codec->control(zr->codec, CODEC_S_JPEG_COM_DATA,
1026                                    sizeof(struct jpeg_com_marker), &com);
1027
1028                 /* Setup the JPEG codec */
1029                 zr->codec->control(zr->codec, CODEC_S_JPEG_TDS_BYTE,
1030                                    sizeof(int), &field_size);
1031                 zr->codec->set_video(zr->codec, zr->timing, &cap,
1032                                      &zr->card.vfe_pol);
1033                 zr->codec->set_mode(zr->codec, CODEC_DO_COMPRESSION);
1034
1035                 /* Setup the VFE */
1036                 if (zr->vfe) {
1037                         zr->vfe->control(zr->vfe, CODEC_S_JPEG_TDS_BYTE,
1038                                          sizeof(int), &field_size);
1039                         zr->vfe->set_video(zr->vfe, zr->timing, &cap,
1040                                            &zr->card.vfe_pol);
1041                         zr->vfe->set_mode(zr->vfe, CODEC_DO_COMPRESSION);
1042                 }
1043
1044                 init_jpeg_queue(zr);
1045                 zr36057_set_jpg(zr, mode);      // \P_Reset, ... Video param, FIFO
1046
1047                 clear_interrupt_counters(zr);
1048                 dprintk(2, KERN_INFO "%s: enable_jpg(MOTION_COMPRESS)\n",
1049                         ZR_DEVNAME(zr));
1050                 break;
1051         }
1052
1053         case BUZ_MODE_MOTION_DECOMPRESS:
1054                 /* In motion decompression mode, the decoder output must be disabled, and
1055                  * the video bus direction set to output.
1056                  */
1057                 decoder_command(zr, DECODER_ENABLE_OUTPUT, &zero);
1058                 set_videobus_dir(zr, 1);
1059                 encoder_command(zr, ENCODER_SET_INPUT, &one);
1060
1061                 /* Take the JPEG codec and the VFE out of sleep */
1062                 jpeg_codec_sleep(zr, 0);
1063                 /* Setup the VFE */
1064                 if (zr->vfe) {
1065                         zr->vfe->set_video(zr->vfe, zr->timing, &cap,
1066                                            &zr->card.vfe_pol);
1067                         zr->vfe->set_mode(zr->vfe, CODEC_DO_EXPANSION);
1068                 }
1069                 /* Setup the JPEG codec */
1070                 zr->codec->set_video(zr->codec, zr->timing, &cap,
1071                                      &zr->card.vfe_pol);
1072                 zr->codec->set_mode(zr->codec, CODEC_DO_EXPANSION);
1073
1074                 init_jpeg_queue(zr);
1075                 zr36057_set_jpg(zr, mode);      // \P_Reset, ... Video param, FIFO
1076
1077                 clear_interrupt_counters(zr);
1078                 dprintk(2, KERN_INFO "%s: enable_jpg(MOTION_DECOMPRESS)\n",
1079                         ZR_DEVNAME(zr));
1080                 break;
1081
1082         case BUZ_MODE_IDLE:
1083         default:
1084                 /* shut down processing */
1085                 btand(~(zr->card.jpeg_int | ZR36057_ICR_JPEGRepIRQ),
1086                       ZR36057_ICR);
1087                 btwrite(zr->card.jpeg_int | ZR36057_ICR_JPEGRepIRQ,
1088                         ZR36057_ISR);
1089                 btand(~ZR36057_JMC_Go_en, ZR36057_JMC); // \Go_en
1090
1091                 msleep(50);
1092
1093                 set_videobus_dir(zr, 0);
1094                 set_frame(zr, 1);       // /FRAME
1095                 btor(ZR36057_MCTCR_CFlush, ZR36057_MCTCR);      // /CFlush
1096                 btwrite(0, ZR36057_JPC);        // \P_Reset,\CodTrnsEn,\Active
1097                 btand(~ZR36057_JMC_VFIFO_FB, ZR36057_JMC);
1098                 btand(~ZR36057_JMC_SyncMstr, ZR36057_JMC);
1099                 jpeg_codec_reset(zr);
1100                 jpeg_codec_sleep(zr, 1);
1101                 zr36057_adjust_vfe(zr, mode);
1102
1103                 decoder_command(zr, DECODER_ENABLE_OUTPUT, &one);
1104                 encoder_command(zr, ENCODER_SET_INPUT, &zero);
1105
1106                 dprintk(2, KERN_INFO "%s: enable_jpg(IDLE)\n", ZR_DEVNAME(zr));
1107                 break;
1108
1109         }
1110 }
1111
1112 /* when this is called the spinlock must be held */
1113 void
1114 zoran_feed_stat_com (struct zoran *zr)
1115 {
1116         /* move frames from pending queue to DMA */
1117
1118         int frame, i, max_stat_com;
1119
1120         max_stat_com =
1121             (zr->jpg_settings.TmpDcm ==
1122              1) ? BUZ_NUM_STAT_COM : (BUZ_NUM_STAT_COM >> 1);
1123
1124         while ((zr->jpg_dma_head - zr->jpg_dma_tail) < max_stat_com &&
1125                zr->jpg_dma_head < zr->jpg_que_head) {
1126
1127                 frame = zr->jpg_pend[zr->jpg_dma_head & BUZ_MASK_FRAME];
1128                 if (zr->jpg_settings.TmpDcm == 1) {
1129                         /* fill 1 stat_com entry */
1130                         i = (zr->jpg_dma_head -
1131                              zr->jpg_err_shift) & BUZ_MASK_STAT_COM;
1132                         if (!(zr->stat_com[i] & cpu_to_le32(1)))
1133                                 break;
1134                         zr->stat_com[i] =
1135                             cpu_to_le32(zr->jpg_buffers.buffer[frame].frag_tab_bus);
1136                 } else {
1137                         /* fill 2 stat_com entries */
1138                         i = ((zr->jpg_dma_head -
1139                               zr->jpg_err_shift) & 1) * 2;
1140                         if (!(zr->stat_com[i] & cpu_to_le32(1)))
1141                                 break;
1142                         zr->stat_com[i] =
1143                             cpu_to_le32(zr->jpg_buffers.buffer[frame].frag_tab_bus);
1144                         zr->stat_com[i + 1] =
1145                             cpu_to_le32(zr->jpg_buffers.buffer[frame].frag_tab_bus);
1146                 }
1147                 zr->jpg_buffers.buffer[frame].state = BUZ_STATE_DMA;
1148                 zr->jpg_dma_head++;
1149
1150         }
1151         if (zr->codec_mode == BUZ_MODE_MOTION_DECOMPRESS)
1152                 zr->jpg_queued_num++;
1153 }
1154
1155 /* when this is called the spinlock must be held */
1156 static void
1157 zoran_reap_stat_com (struct zoran *zr)
1158 {
1159         /* move frames from DMA queue to done queue */
1160
1161         int i;
1162         u32 stat_com;
1163         unsigned int seq;
1164         unsigned int dif;
1165         struct zoran_jpg_buffer *buffer;
1166         int frame;
1167
1168         /* In motion decompress we don't have a hardware frame counter,
1169          * we just count the interrupts here */
1170
1171         if (zr->codec_mode == BUZ_MODE_MOTION_DECOMPRESS) {
1172                 zr->jpg_seq_num++;
1173         }
1174         while (zr->jpg_dma_tail < zr->jpg_dma_head) {
1175                 if (zr->jpg_settings.TmpDcm == 1)
1176                         i = (zr->jpg_dma_tail -
1177                              zr->jpg_err_shift) & BUZ_MASK_STAT_COM;
1178                 else
1179                         i = ((zr->jpg_dma_tail -
1180                               zr->jpg_err_shift) & 1) * 2 + 1;
1181
1182                 stat_com = le32_to_cpu(zr->stat_com[i]);
1183
1184                 if ((stat_com & 1) == 0) {
1185                         return;
1186                 }
1187                 frame = zr->jpg_pend[zr->jpg_dma_tail & BUZ_MASK_FRAME];
1188                 buffer = &zr->jpg_buffers.buffer[frame];
1189                 do_gettimeofday(&buffer->bs.timestamp);
1190
1191                 if (zr->codec_mode == BUZ_MODE_MOTION_COMPRESS) {
1192                         buffer->bs.length = (stat_com & 0x7fffff) >> 1;
1193
1194                         /* update sequence number with the help of the counter in stat_com */
1195
1196                         seq = ((stat_com >> 24) + zr->jpg_err_seq) & 0xff;
1197                         dif = (seq - zr->jpg_seq_num) & 0xff;
1198                         zr->jpg_seq_num += dif;
1199                 } else {
1200                         buffer->bs.length = 0;
1201                 }
1202                 buffer->bs.seq =
1203                     zr->jpg_settings.TmpDcm ==
1204                     2 ? (zr->jpg_seq_num >> 1) : zr->jpg_seq_num;
1205                 buffer->state = BUZ_STATE_DONE;
1206
1207                 zr->jpg_dma_tail++;
1208         }
1209 }
1210
1211 static void zoran_restart(struct zoran *zr)
1212 {
1213         /* Now the stat_comm buffer is ready for restart */
1214         int status, mode;
1215
1216         if (zr->codec_mode == BUZ_MODE_MOTION_COMPRESS) {
1217                 decoder_command(zr, DECODER_GET_STATUS, &status);
1218                 mode = CODEC_DO_COMPRESSION;
1219         } else {
1220                 status = 0;
1221                 mode = CODEC_DO_EXPANSION;
1222         }
1223         if (zr->codec_mode == BUZ_MODE_MOTION_DECOMPRESS ||
1224             (status & DECODER_STATUS_GOOD)) {
1225                 /********** RESTART code *************/
1226                 jpeg_codec_reset(zr);
1227                 zr->codec->set_mode(zr->codec, mode);
1228                 zr36057_set_jpg(zr, zr->codec_mode);
1229                 jpeg_start(zr);
1230
1231                 if (zr->num_errors <= 8)
1232                         dprintk(2, KERN_INFO "%s: Restart\n",
1233                                 ZR_DEVNAME(zr));
1234
1235                 zr->JPEG_missed = 0;
1236                 zr->JPEG_error = 2;
1237                 /********** End RESTART code ***********/
1238         }
1239 }
1240
1241 static void
1242 error_handler (struct zoran *zr,
1243                u32           astat,
1244                u32           stat)
1245 {
1246         int i, j;
1247
1248         /* This is JPEG error handling part */
1249         if (zr->codec_mode != BUZ_MODE_MOTION_COMPRESS &&
1250             zr->codec_mode != BUZ_MODE_MOTION_DECOMPRESS) {
1251                 return;
1252         }
1253
1254         if ((stat & 1) == 0 &&
1255             zr->codec_mode == BUZ_MODE_MOTION_COMPRESS &&
1256             zr->jpg_dma_tail - zr->jpg_que_tail >= zr->jpg_buffers.num_buffers) {
1257                 /* No free buffers... */
1258                 zoran_reap_stat_com(zr);
1259                 zoran_feed_stat_com(zr);
1260                 wake_up_interruptible(&zr->jpg_capq);
1261                 zr->JPEG_missed = 0;
1262                 return;
1263         }
1264
1265         if (zr->JPEG_error == 1) {
1266                 zoran_restart(zr);
1267                 return;
1268         }
1269
1270         /*
1271          * First entry: error just happened during normal operation
1272          *
1273          * In BUZ_MODE_MOTION_COMPRESS:
1274          *
1275          * Possible glitch in TV signal. In this case we should
1276          * stop the codec and wait for good quality signal before
1277          * restarting it to avoid further problems
1278          *
1279          * In BUZ_MODE_MOTION_DECOMPRESS:
1280          *
1281          * Bad JPEG frame: we have to mark it as processed (codec crashed
1282          * and was not able to do it itself), and to remove it from queue.
1283          */
1284         btand(~ZR36057_JMC_Go_en, ZR36057_JMC);
1285         udelay(1);
1286         stat = stat | (post_office_read(zr, 7, 0) & 3) << 8;
1287         btwrite(0, ZR36057_JPC);
1288         btor(ZR36057_MCTCR_CFlush, ZR36057_MCTCR);
1289         jpeg_codec_reset(zr);
1290         jpeg_codec_sleep(zr, 1);
1291         zr->JPEG_error = 1;
1292         zr->num_errors++;
1293
1294         /* Report error */
1295         if (zr36067_debug > 1 && zr->num_errors <= 8) {
1296                 long frame;
1297
1298                 frame = zr->jpg_pend[zr->jpg_dma_tail & BUZ_MASK_FRAME];
1299                 printk(KERN_ERR
1300                        "%s: JPEG error stat=0x%08x(0x%08x) queue_state=%ld/%ld/%ld/%ld seq=%ld frame=%ld. Codec stopped. ",
1301                        ZR_DEVNAME(zr), stat, zr->last_isr,
1302                        zr->jpg_que_tail, zr->jpg_dma_tail,
1303                        zr->jpg_dma_head, zr->jpg_que_head,
1304                        zr->jpg_seq_num, frame);
1305                 printk(KERN_INFO "stat_com frames:");
1306                 for (j = 0; j < BUZ_NUM_STAT_COM; j++) {
1307                         for (i = 0; i < zr->jpg_buffers.num_buffers; i++) {
1308                                 if (le32_to_cpu(zr->stat_com[j]) == zr->jpg_buffers.buffer[i].frag_tab_bus)
1309                                         printk(KERN_CONT "% d->%d", j, i);
1310                         }
1311                 }
1312                 printk(KERN_CONT "\n");
1313         }
1314         /* Find an entry in stat_com and rotate contents */
1315         if (zr->jpg_settings.TmpDcm == 1)
1316                 i = (zr->jpg_dma_tail - zr->jpg_err_shift) & BUZ_MASK_STAT_COM;
1317         else
1318                 i = ((zr->jpg_dma_tail - zr->jpg_err_shift) & 1) * 2;
1319         if (zr->codec_mode == BUZ_MODE_MOTION_DECOMPRESS) {
1320                 /* Mimic zr36067 operation */
1321                 zr->stat_com[i] |= cpu_to_le32(1);
1322                 if (zr->jpg_settings.TmpDcm != 1)
1323                         zr->stat_com[i + 1] |= cpu_to_le32(1);
1324                 /* Refill */
1325                 zoran_reap_stat_com(zr);
1326                 zoran_feed_stat_com(zr);
1327                 wake_up_interruptible(&zr->jpg_capq);
1328                 /* Find an entry in stat_com again after refill */
1329                 if (zr->jpg_settings.TmpDcm == 1)
1330                         i = (zr->jpg_dma_tail - zr->jpg_err_shift) & BUZ_MASK_STAT_COM;
1331                 else
1332                         i = ((zr->jpg_dma_tail - zr->jpg_err_shift) & 1) * 2;
1333         }
1334         if (i) {
1335                 /* Rotate stat_comm entries to make current entry first */
1336                 int j;
1337                 __le32 bus_addr[BUZ_NUM_STAT_COM];
1338
1339                 /* Here we are copying the stat_com array, which
1340                  * is already in little endian format, so
1341                  * no endian conversions here
1342                  */
1343                 memcpy(bus_addr, zr->stat_com, sizeof(bus_addr));
1344
1345                 for (j = 0; j < BUZ_NUM_STAT_COM; j++)
1346                         zr->stat_com[j] = bus_addr[(i + j) & BUZ_MASK_STAT_COM];
1347
1348                 zr->jpg_err_shift += i;
1349                 zr->jpg_err_shift &= BUZ_MASK_STAT_COM;
1350         }
1351         if (zr->codec_mode == BUZ_MODE_MOTION_COMPRESS)
1352                 zr->jpg_err_seq = zr->jpg_seq_num;      /* + 1; */
1353         zoran_restart(zr);
1354 }
1355
1356 irqreturn_t
1357 zoran_irq (int             irq,
1358            void           *dev_id)
1359 {
1360         u32 stat, astat;
1361         int count;
1362         struct zoran *zr;
1363         unsigned long flags;
1364
1365         zr = dev_id;
1366         count = 0;
1367
1368         if (zr->testing) {
1369                 /* Testing interrupts */
1370                 spin_lock_irqsave(&zr->spinlock, flags);
1371                 while ((stat = count_reset_interrupt(zr))) {
1372                         if (count++ > 100) {
1373                                 btand(~ZR36057_ICR_IntPinEn, ZR36057_ICR);
1374                                 dprintk(1,
1375                                         KERN_ERR
1376                                         "%s: IRQ lockup while testing, isr=0x%08x, cleared int mask\n",
1377                                         ZR_DEVNAME(zr), stat);
1378                                 wake_up_interruptible(&zr->test_q);
1379                         }
1380                 }
1381                 zr->last_isr = stat;
1382                 spin_unlock_irqrestore(&zr->spinlock, flags);
1383                 return IRQ_HANDLED;
1384         }
1385
1386         spin_lock_irqsave(&zr->spinlock, flags);
1387         while (1) {
1388                 /* get/clear interrupt status bits */
1389                 stat = count_reset_interrupt(zr);
1390                 astat = stat & IRQ_MASK;
1391                 if (!astat) {
1392                         break;
1393                 }
1394                 dprintk(4,
1395                         KERN_DEBUG
1396                         "zoran_irq: astat: 0x%08x, mask: 0x%08x\n",
1397                         astat, btread(ZR36057_ICR));
1398                 if (astat & zr->card.vsync_int) {       // SW
1399
1400                         if (zr->codec_mode == BUZ_MODE_MOTION_DECOMPRESS ||
1401                             zr->codec_mode == BUZ_MODE_MOTION_COMPRESS) {
1402                                 /* count missed interrupts */
1403                                 zr->JPEG_missed++;
1404                         }
1405                         //post_office_read(zr,1,0);
1406                         /* Interrupts may still happen when
1407                          * zr->v4l_memgrab_active is switched off.
1408                          * We simply ignore them */
1409
1410                         if (zr->v4l_memgrab_active) {
1411                                 /* A lot more checks should be here ... */
1412                                 if ((btread(ZR36057_VSSFGR) & ZR36057_VSSFGR_SnapShot) == 0)
1413                                         dprintk(1,
1414                                                 KERN_WARNING
1415                                                 "%s: BuzIRQ with SnapShot off ???\n",
1416                                                 ZR_DEVNAME(zr));
1417
1418                                 if (zr->v4l_grab_frame != NO_GRAB_ACTIVE) {
1419                                         /* There is a grab on a frame going on, check if it has finished */
1420                                         if ((btread(ZR36057_VSSFGR) & ZR36057_VSSFGR_FrameGrab) == 0) {
1421                                                 /* it is finished, notify the user */
1422
1423                                                 zr->v4l_buffers.buffer[zr->v4l_grab_frame].state = BUZ_STATE_DONE;
1424                                                 zr->v4l_buffers.buffer[zr->v4l_grab_frame].bs.seq = zr->v4l_grab_seq;
1425                                                 do_gettimeofday(&zr->v4l_buffers.buffer[zr->v4l_grab_frame].bs.timestamp);
1426                                                 zr->v4l_grab_frame = NO_GRAB_ACTIVE;
1427                                                 zr->v4l_pend_tail++;
1428                                         }
1429                                 }
1430
1431                                 if (zr->v4l_grab_frame == NO_GRAB_ACTIVE)
1432                                         wake_up_interruptible(&zr->v4l_capq);
1433
1434                                 /* Check if there is another grab queued */
1435
1436                                 if (zr->v4l_grab_frame == NO_GRAB_ACTIVE &&
1437                                     zr->v4l_pend_tail != zr->v4l_pend_head) {
1438                                         int frame = zr->v4l_pend[zr->v4l_pend_tail & V4L_MASK_FRAME];
1439                                         u32 reg;
1440
1441                                         zr->v4l_grab_frame = frame;
1442
1443                                         /* Set zr36057 video front end and enable video */
1444
1445                                         /* Buffer address */
1446
1447                                         reg = zr->v4l_buffers.buffer[frame].fbuffer_bus;
1448                                         btwrite(reg, ZR36057_VDTR);
1449                                         if (zr->v4l_settings.height > BUZ_MAX_HEIGHT / 2)
1450                                                 reg += zr->v4l_settings.bytesperline;
1451                                         btwrite(reg, ZR36057_VDBR);
1452
1453                                         /* video stride, status, and frame grab register */
1454                                         reg = 0;
1455                                         if (zr->v4l_settings.height > BUZ_MAX_HEIGHT / 2)
1456                                                 reg += zr->v4l_settings.bytesperline;
1457                                         reg = (reg << ZR36057_VSSFGR_DispStride);
1458                                         reg |= ZR36057_VSSFGR_VidOvf;
1459                                         reg |= ZR36057_VSSFGR_SnapShot;
1460                                         reg |= ZR36057_VSSFGR_FrameGrab;
1461                                         btwrite(reg, ZR36057_VSSFGR);
1462
1463                                         btor(ZR36057_VDCR_VidEn,
1464                                              ZR36057_VDCR);
1465                                 }
1466                         }
1467
1468                         /* even if we don't grab, we do want to increment
1469                          * the sequence counter to see lost frames */
1470                         zr->v4l_grab_seq++;
1471                 }
1472 #if (IRQ_MASK & ZR36057_ISR_CodRepIRQ)
1473                 if (astat & ZR36057_ISR_CodRepIRQ) {
1474                         zr->intr_counter_CodRepIRQ++;
1475                         IDEBUG(printk(KERN_DEBUG "%s: ZR36057_ISR_CodRepIRQ\n",
1476                                 ZR_DEVNAME(zr)));
1477                         btand(~ZR36057_ICR_CodRepIRQ, ZR36057_ICR);
1478                 }
1479 #endif                          /* (IRQ_MASK & ZR36057_ISR_CodRepIRQ) */
1480
1481 #if (IRQ_MASK & ZR36057_ISR_JPEGRepIRQ)
1482                 if ((astat & ZR36057_ISR_JPEGRepIRQ) &&
1483                     (zr->codec_mode == BUZ_MODE_MOTION_DECOMPRESS ||
1484                      zr->codec_mode == BUZ_MODE_MOTION_COMPRESS)) {
1485                         if (zr36067_debug > 1 && (!zr->frame_num || zr->JPEG_error)) {
1486                                 char sc[] = "0000";
1487                                 char sv[5];
1488                                 int i;
1489
1490                                 printk(KERN_INFO
1491                                        "%s: first frame ready: state=0x%08x odd_even=%d field_per_buff=%d delay=%d\n",
1492                                        ZR_DEVNAME(zr), stat,
1493                                        zr->jpg_settings.odd_even,
1494                                        zr->jpg_settings.field_per_buff,
1495                                        zr->JPEG_missed);
1496
1497                                 strcpy(sv, sc);
1498                                 for (i = 0; i < 4; i++) {
1499                                         if (le32_to_cpu(zr->stat_com[i]) & 1)
1500                                                 sv[i] = '1';
1501                                 }
1502                                 sv[4] = 0;
1503                                 printk(KERN_INFO
1504                                        "%s: stat_com=%s queue_state=%ld/%ld/%ld/%ld\n",
1505                                        ZR_DEVNAME(zr), sv,
1506                                        zr->jpg_que_tail,
1507                                        zr->jpg_dma_tail,
1508                                        zr->jpg_dma_head,
1509                                        zr->jpg_que_head);
1510                         } else {
1511                                 /* Get statistics */
1512                                 if (zr->JPEG_missed > zr->JPEG_max_missed)
1513                                         zr->JPEG_max_missed = zr->JPEG_missed;
1514                                 if (zr->JPEG_missed < zr->JPEG_min_missed)
1515                                         zr->JPEG_min_missed = zr->JPEG_missed;
1516                         }
1517
1518                         if (zr36067_debug > 2 && zr->frame_num < 6) {
1519                                 int i;
1520
1521                                 printk(KERN_INFO "%s: seq=%ld stat_com:",
1522                                        ZR_DEVNAME(zr), zr->jpg_seq_num);
1523                                 for (i = 0; i < 4; i++) {
1524                                         printk(KERN_CONT " %08x",
1525                                                le32_to_cpu(zr->stat_com[i]));
1526                                 }
1527                                 printk(KERN_CONT "\n");
1528                         }
1529                         zr->frame_num++;
1530                         zr->JPEG_missed = 0;
1531                         zr->JPEG_error = 0;
1532                         zoran_reap_stat_com(zr);
1533                         zoran_feed_stat_com(zr);
1534                         wake_up_interruptible(&zr->jpg_capq);
1535                 }
1536 #endif                          /* (IRQ_MASK & ZR36057_ISR_JPEGRepIRQ) */
1537
1538                 /* DATERR, too many fields missed, error processing */
1539                 if ((astat & zr->card.jpeg_int) ||
1540                     zr->JPEG_missed > 25 ||
1541                     zr->JPEG_error == 1 ||
1542                     ((zr->codec_mode == BUZ_MODE_MOTION_DECOMPRESS) &&
1543                      (zr->frame_num & (zr->JPEG_missed > zr->jpg_settings.field_per_buff)))) {
1544                         error_handler(zr, astat, stat);
1545                 }
1546
1547                 count++;
1548                 if (count > 10) {
1549                         dprintk(2, KERN_WARNING "%s: irq loop %d\n",
1550                                 ZR_DEVNAME(zr), count);
1551                         if (count > 20) {
1552                                 btand(~ZR36057_ICR_IntPinEn, ZR36057_ICR);
1553                                 dprintk(2,
1554                                         KERN_ERR
1555                                         "%s: IRQ lockup, cleared int mask\n",
1556                                         ZR_DEVNAME(zr));
1557                                 break;
1558                         }
1559                 }
1560                 zr->last_isr = stat;
1561         }
1562         spin_unlock_irqrestore(&zr->spinlock, flags);
1563
1564         return IRQ_HANDLED;
1565 }
1566
1567 void
1568 zoran_set_pci_master (struct zoran *zr,
1569                       int           set_master)
1570 {
1571         if (set_master) {
1572                 pci_set_master(zr->pci_dev);
1573         } else {
1574                 u16 command;
1575
1576                 pci_read_config_word(zr->pci_dev, PCI_COMMAND, &command);
1577                 command &= ~PCI_COMMAND_MASTER;
1578                 pci_write_config_word(zr->pci_dev, PCI_COMMAND, command);
1579         }
1580 }
1581
1582 void
1583 zoran_init_hardware (struct zoran *zr)
1584 {
1585         int j, zero = 0;
1586
1587         /* Enable bus-mastering */
1588         zoran_set_pci_master(zr, 1);
1589
1590         /* Initialize the board */
1591         if (zr->card.init) {
1592                 zr->card.init(zr);
1593         }
1594
1595         j = zr->card.input[zr->input].muxsel;
1596
1597         decoder_command(zr, 0, NULL);
1598         decoder_command(zr, DECODER_SET_NORM, &zr->norm);
1599         decoder_command(zr, DECODER_SET_INPUT, &j);
1600
1601         encoder_command(zr, 0, NULL);
1602         encoder_command(zr, ENCODER_SET_NORM, &zr->norm);
1603         encoder_command(zr, ENCODER_SET_INPUT, &zero);
1604
1605         /* toggle JPEG codec sleep to sync PLL */
1606         jpeg_codec_sleep(zr, 1);
1607         jpeg_codec_sleep(zr, 0);
1608
1609         /* set individual interrupt enables (without GIRQ1)
1610          * but don't global enable until zoran_open() */
1611
1612         //btwrite(IRQ_MASK & ~ZR36057_ISR_GIRQ1, ZR36057_ICR);  // SW
1613         // It looks like using only JPEGRepIRQEn is not always reliable,
1614         // may be when JPEG codec crashes it won't generate IRQ? So,
1615          /*CP*/                 //        btwrite(IRQ_MASK, ZR36057_ICR); // Enable Vsync interrupts too. SM    WHY ? LP
1616             zr36057_init_vfe(zr);
1617
1618         zr36057_enable_jpg(zr, BUZ_MODE_IDLE);
1619
1620         btwrite(IRQ_MASK, ZR36057_ISR); // Clears interrupts
1621 }
1622
1623 void
1624 zr36057_restart (struct zoran *zr)
1625 {
1626         btwrite(0, ZR36057_SPGPPCR);
1627         mdelay(1);
1628         btor(ZR36057_SPGPPCR_SoftReset, ZR36057_SPGPPCR);
1629         mdelay(1);
1630
1631         /* assert P_Reset */
1632         btwrite(0, ZR36057_JPC);
1633         /* set up GPIO direction - all output */
1634         btwrite(ZR36057_SPGPPCR_SoftReset | 0, ZR36057_SPGPPCR);
1635
1636         /* set up GPIO pins and guest bus timing */
1637         btwrite((0x81 << 24) | 0x8888, ZR36057_GPPGCR1);
1638 }
1639
1640 /*
1641  * initialize video front end
1642  */
1643
1644 static void
1645 zr36057_init_vfe (struct zoran *zr)
1646 {
1647         u32 reg;
1648
1649         reg = btread(ZR36057_VFESPFR);
1650         reg |= ZR36057_VFESPFR_LittleEndian;
1651         reg &= ~ZR36057_VFESPFR_VCLKPol;
1652         reg |= ZR36057_VFESPFR_ExtFl;
1653         reg |= ZR36057_VFESPFR_TopField;
1654         btwrite(reg, ZR36057_VFESPFR);
1655         reg = btread(ZR36057_VDCR);
1656         if (pci_pci_problems & PCIPCI_TRITON)
1657                 // || zr->revision < 1) // Revision 1 has also Triton support
1658                 reg &= ~ZR36057_VDCR_Triton;
1659         else
1660                 reg |= ZR36057_VDCR_Triton;
1661         btwrite(reg, ZR36057_VDCR);
1662 }
1663
1664 /*
1665  * Interface to decoder and encoder chips using i2c bus
1666  */
1667
1668 int
1669 decoder_command (struct zoran *zr,
1670                  int           cmd,
1671                  void         *data)
1672 {
1673         if (zr->decoder == NULL)
1674                 return -EIO;
1675
1676         if (zr->card.type == LML33 &&
1677             (cmd == DECODER_SET_NORM || cmd == DECODER_SET_INPUT)) {
1678                 int res;
1679
1680                 // Bt819 needs to reset its FIFO buffer using #FRST pin and
1681                 // LML33 card uses GPIO(7) for that.
1682                 GPIO(zr, 7, 0);
1683                 res = zr->decoder->driver->command(zr->decoder, cmd, data);
1684                 // Pull #FRST high.
1685                 GPIO(zr, 7, 1);
1686                 return res;
1687         } else
1688                 return zr->decoder->driver->command(zr->decoder, cmd,
1689                                                     data);
1690 }
1691
1692 int
1693 encoder_command (struct zoran *zr,
1694                  int           cmd,
1695                  void         *data)
1696 {
1697         if (zr->encoder == NULL)
1698                 return -1;
1699
1700         return zr->encoder->driver->command(zr->encoder, cmd, data);
1701 }