git.oblomov.eu Git - linux-2.6/blob - drivers/media/video/cx18/cx18-av-vbi.c

   1 /*
   2  *  cx18 ADEC VBI functions
   3  *
   4  *  Derived from cx25840-vbi.c
   5  *
   6  *  Copyright (C) 2007  Hans Verkuil <hverkuil@xs4all.nl>
   7  *
   8  *  This program is free software; you can redistribute it and/or
   9  *  modify it under the terms of the GNU General Public License
  10  *  as published by the Free Software Foundation; either version 2
  11  *  of the License, or (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21  *  02110-1301, USA.
  22  */
  23
  24
  25 #include "cx18-driver.h"
  26
  27 static int odd_parity(u8 c)
  28 {
  29         c ^= (c >> 4);
  30         c ^= (c >> 2);
  31         c ^= (c >> 1);
  32
  33         return c & 1;
  34 }
  35
  36 static int decode_vps(u8 *dst, u8 *p)
  37 {
  38         static const u8 biphase_tbl[] = {
  39                 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4,
  40                 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0,
  41                 0xd2, 0x5a, 0x52, 0xd2, 0x96, 0x1e, 0x16, 0x96,
  42                 0x92, 0x1a, 0x12, 0x92, 0xd2, 0x5a, 0x52, 0xd2,
  43                 0xd0, 0x58, 0x50, 0xd0, 0x94, 0x1c, 0x14, 0x94,
  44                 0x90, 0x18, 0x10, 0x90, 0xd0, 0x58, 0x50, 0xd0,
  45                 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4,
  46                 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0,
  47                 0xe1, 0x69, 0x61, 0xe1, 0xa5, 0x2d, 0x25, 0xa5,
  48                 0xa1, 0x29, 0x21, 0xa1, 0xe1, 0x69, 0x61, 0xe1,
  49                 0xc3, 0x4b, 0x43, 0xc3, 0x87, 0x0f, 0x07, 0x87,
  50                 0x83, 0x0b, 0x03, 0x83, 0xc3, 0x4b, 0x43, 0xc3,
  51                 0xc1, 0x49, 0x41, 0xc1, 0x85, 0x0d, 0x05, 0x85,
  52                 0x81, 0x09, 0x01, 0x81, 0xc1, 0x49, 0x41, 0xc1,
  53                 0xe1, 0x69, 0x61, 0xe1, 0xa5, 0x2d, 0x25, 0xa5,
  54                 0xa1, 0x29, 0x21, 0xa1, 0xe1, 0x69, 0x61, 0xe1,
  55                 0xe0, 0x68, 0x60, 0xe0, 0xa4, 0x2c, 0x24, 0xa4,
  56                 0xa0, 0x28, 0x20, 0xa0, 0xe0, 0x68, 0x60, 0xe0,
  57                 0xc2, 0x4a, 0x42, 0xc2, 0x86, 0x0e, 0x06, 0x86,
  58                 0x82, 0x0a, 0x02, 0x82, 0xc2, 0x4a, 0x42, 0xc2,
  59                 0xc0, 0x48, 0x40, 0xc0, 0x84, 0x0c, 0x04, 0x84,
  60                 0x80, 0x08, 0x00, 0x80, 0xc0, 0x48, 0x40, 0xc0,
  61                 0xe0, 0x68, 0x60, 0xe0, 0xa4, 0x2c, 0x24, 0xa4,
  62                 0xa0, 0x28, 0x20, 0xa0, 0xe0, 0x68, 0x60, 0xe0,
  63                 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4,
  64                 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0,
  65                 0xd2, 0x5a, 0x52, 0xd2, 0x96, 0x1e, 0x16, 0x96,
  66                 0x92, 0x1a, 0x12, 0x92, 0xd2, 0x5a, 0x52, 0xd2,
  67                 0xd0, 0x58, 0x50, 0xd0, 0x94, 0x1c, 0x14, 0x94,
  68                 0x90, 0x18, 0x10, 0x90, 0xd0, 0x58, 0x50, 0xd0,
  69                 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4,
  70                 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0,
  71         };
  72
  73         u8 c, err = 0;
  74         int i;
  75
  76         for (i = 0; i < 2 * 13; i += 2) {
  77                 err |= biphase_tbl[p[i]] | biphase_tbl[p[i + 1]];
  78                 c = (biphase_tbl[p[i + 1]] & 0xf) |
  79                     ((biphase_tbl[p[i]] & 0xf) << 4);
  80                 dst[i / 2] = c;
  81         }
  82
  83         return err & 0xf0;
  84 }
  85
  86 void cx18_av_vbi_setup(struct cx18 *cx)
  87 {
  88         struct cx18_av_state *state = &cx->av_state;
  89         v4l2_std_id std = state->std;
  90         int hblank, hactive, burst, vblank, vactive, sc;
  91         int vblank656, src_decimation;
  92         int luma_lpf, uv_lpf, comb;
  93         u32 pll_int, pll_frac, pll_post;
  94
  95         /* datasheet startup, step 8d */
  96         if (std & ~V4L2_STD_NTSC)
  97                 cx18_av_write(cx, 0x49f, 0x11);
  98         else
  99                 cx18_av_write(cx, 0x49f, 0x14);
 100
 101         if (std & V4L2_STD_625_50) {
 102                 hblank = 0x084;
 103                 hactive = 0x2d0;
 104                 burst = 0x5d;
 105                 vblank = 0x024;
 106                 vactive = 0x244;
 107                 vblank656 = 0x28;
 108                 src_decimation = 0x21f;
 109
 110                 luma_lpf = 2;
 111                 if (std & V4L2_STD_SECAM) {
 112                         uv_lpf = 0;
 113                         comb = 0;
 114                         sc = 0x0a425f;
 115                 } else if (std == V4L2_STD_PAL_Nc) {
 116                         uv_lpf = 1;
 117                         comb = 0x20;
 118                         sc = 556453;
 119                 } else {
 120                         uv_lpf = 1;
 121                         comb = 0x20;
 122                         sc = 0x0a8263;
 123                 }
 124         } else {
 125                 hactive = 720;
 126                 hblank = 122;
 127                 vactive = 487;
 128                 luma_lpf = 1;
 129                 uv_lpf = 1;
 130
 131                 src_decimation = 0x21f;
 132                 if (std == V4L2_STD_PAL_60) {
 133                         vblank = 26;
 134                         vblank656 = 26;
 135                         burst = 0x5b;
 136                         luma_lpf = 2;
 137                         comb = 0x20;
 138                         sc = 0x0a8263;
 139                 } else if (std == V4L2_STD_PAL_M) {
 140                         vblank = 20;
 141                         vblank656 = 24;
 142                         burst = 0x61;
 143                         comb = 0x20;
 144
 145                         sc = 555452;
 146                 } else {
 147                         vblank = 26;
 148                         vblank656 = 26;
 149                         burst = 0x5b;
 150                         comb = 0x66;
 151                         sc = 556063;
 152                 }
 153         }
 154
 155         /* DEBUG: Displays configured PLL frequency */
 156         pll_int = cx18_av_read(cx, 0x108);
 157         pll_frac = cx18_av_read4(cx, 0x10c) & 0x1ffffff;
 158         pll_post = cx18_av_read(cx, 0x109);
 159         CX18_DEBUG_INFO("PLL regs = int: %u, frac: %u, post: %u\n",
 160                         pll_int, pll_frac, pll_post);
 161
 162         if (pll_post) {
 163                 int fin, fsc;
 164                 int pll = 28636363L * ((((u64)pll_int) << 25) + pll_frac);
 165
 166                 pll >>= 25;
 167                 pll /= pll_post;
 168                 CX18_DEBUG_INFO("PLL = %d.%06d MHz\n",
 169                                         pll / 1000000, pll % 1000000);
 170                 CX18_DEBUG_INFO("PLL/8 = %d.%06d MHz\n",
 171                                         pll / 8000000, (pll / 8) % 1000000);
 172
 173                 fin = ((u64)src_decimation * pll) >> 12;
 174                 CX18_DEBUG_INFO("ADC Sampling freq = %d.%06d MHz\n",
 175                                         fin / 1000000, fin % 1000000);
 176
 177                 fsc = (((u64)sc) * pll) >> 24L;
 178                 CX18_DEBUG_INFO("Chroma sub-carrier freq = %d.%06d MHz\n",
 179                                         fsc / 1000000, fsc % 1000000);
 180
 181                 CX18_DEBUG_INFO("hblank %i, hactive %i, "
 182                         "vblank %i , vactive %i, vblank656 %i, src_dec %i,"
 183                         "burst 0x%02x, luma_lpf %i, uv_lpf %i, comb 0x%02x,"
 184                         " sc 0x%06x\n",
 185                         hblank, hactive, vblank, vactive, vblank656,
 186                         src_decimation, burst, luma_lpf, uv_lpf, comb, sc);
 187         }
 188
 189         /* Sets horizontal blanking delay and active lines */
 190         cx18_av_write(cx, 0x470, hblank);
 191         cx18_av_write(cx, 0x471, 0xff & (((hblank >> 8) & 0x3) |
 192                                                 (hactive << 4)));
 193         cx18_av_write(cx, 0x472, hactive >> 4);
 194
 195         /* Sets burst gate delay */
 196         cx18_av_write(cx, 0x473, burst);
 197
 198         /* Sets vertical blanking delay and active duration */
 199         cx18_av_write(cx, 0x474, vblank);
 200         cx18_av_write(cx, 0x475, 0xff & (((vblank >> 8) & 0x3) |
 201                                                 (vactive << 4)));
 202         cx18_av_write(cx, 0x476, vactive >> 4);
 203         cx18_av_write(cx, 0x477, vblank656);
 204
 205         /* Sets src decimation rate */
 206         cx18_av_write(cx, 0x478, 0xff & src_decimation);
 207         cx18_av_write(cx, 0x479, 0xff & (src_decimation >> 8));
 208
 209         /* Sets Luma and UV Low pass filters */
 210         cx18_av_write(cx, 0x47a, luma_lpf << 6 | ((uv_lpf << 4) & 0x30));
 211
 212         /* Enables comb filters */
 213         cx18_av_write(cx, 0x47b, comb);
 214
 215         /* Sets SC Step*/
 216         cx18_av_write(cx, 0x47c, sc);
 217         cx18_av_write(cx, 0x47d, 0xff & sc >> 8);
 218         cx18_av_write(cx, 0x47e, 0xff & sc >> 16);
 219
 220         /* Sets VBI parameters */
 221         if (std & V4L2_STD_625_50) {
 222                 cx18_av_write(cx, 0x47f, 0x01);
 223                 state->vbi_line_offset = 5;
 224         } else {
 225                 cx18_av_write(cx, 0x47f, 0x00);
 226                 state->vbi_line_offset = 8;
 227         }
 228 }
 229
 230 int cx18_av_vbi(struct cx18 *cx, unsigned int cmd, void *arg)
 231 {
 232         struct cx18_av_state *state = &cx->av_state;
 233         struct v4l2_format *fmt;
 234         struct v4l2_sliced_vbi_format *svbi;
 235
 236         switch (cmd) {
 237         case VIDIOC_G_FMT:
 238         {
 239                 static u16 lcr2vbi[] = {
 240                         0, V4L2_SLICED_TELETEXT_B, 0,   /* 1 */
 241                         0, V4L2_SLICED_WSS_625, 0,      /* 4 */
 242                         V4L2_SLICED_CAPTION_525,        /* 6 */
 243                         0, 0, V4L2_SLICED_VPS, 0, 0,    /* 9 */
 244                         0, 0, 0, 0
 245                 };
 246                 int is_pal = !(state->std & V4L2_STD_525_60);
 247                 int i;
 248
 249                 fmt = arg;
 250                 if (fmt->type != V4L2_BUF_TYPE_SLICED_VBI_CAPTURE)
 251                         return -EINVAL;
 252                 svbi = &fmt->fmt.sliced;
 253                 memset(svbi, 0, sizeof(*svbi));
 254                 /* we're done if raw VBI is active */
 255                 if ((cx18_av_read(cx, 0x404) & 0x10) == 0)
 256                         break;
 257
 258                 if (is_pal) {
 259                         for (i = 7; i <= 23; i++) {
 260                                 u8 v = cx18_av_read(cx, 0x424 + i - 7);
 261
 262                                 svbi->service_lines[0][i] = lcr2vbi[v >> 4];
 263                                 svbi->service_lines[1][i] = lcr2vbi[v & 0xf];
 264                                 svbi->service_set |= svbi->service_lines[0][i] |
 265                                         svbi->service_lines[1][i];
 266                         }
 267                 } else {
 268                         for (i = 10; i <= 21; i++) {
 269                                 u8 v = cx18_av_read(cx, 0x424 + i - 10);
 270
 271                                 svbi->service_lines[0][i] = lcr2vbi[v >> 4];
 272                                 svbi->service_lines[1][i] = lcr2vbi[v & 0xf];
 273                                 svbi->service_set |= svbi->service_lines[0][i] |
 274                                         svbi->service_lines[1][i];
 275                         }
 276                 }
 277                 break;
 278         }
 279
 280         case VIDIOC_S_FMT:
 281         {
 282                 int is_pal = !(state->std & V4L2_STD_525_60);
 283                 int vbi_offset = is_pal ? 1 : 0;
 284                 int i, x;
 285                 u8 lcr[24];
 286
 287                 fmt = arg;
 288                 if (fmt->type != V4L2_BUF_TYPE_SLICED_VBI_CAPTURE)
 289                         return -EINVAL;
 290                 svbi = &fmt->fmt.sliced;
 291                 if (svbi->service_set == 0) {
 292                         /* raw VBI */
 293                         memset(svbi, 0, sizeof(*svbi));
 294
 295                         /* Setup VBI */
 296                         cx18_av_vbi_setup(cx);
 297
 298                         /* VBI Offset */
 299                         cx18_av_write(cx, 0x47f, vbi_offset);
 300                         cx18_av_write(cx, 0x404, 0x2e);
 301                         break;
 302                 }
 303
 304                 for (x = 0; x <= 23; x++)
 305                         lcr[x] = 0x00;
 306
 307                 /* Setup VBI */
 308                 cx18_av_vbi_setup(cx);
 309
 310                 /* Sliced VBI */
 311                 cx18_av_write(cx, 0x404, 0x32); /* Ancillary data */
 312                 cx18_av_write(cx, 0x406, 0x13);
 313                 cx18_av_write(cx, 0x47f, vbi_offset);
 314
 315                 if (is_pal) {
 316                         for (i = 0; i <= 6; i++)
 317                                 svbi->service_lines[0][i] =
 318                                         svbi->service_lines[1][i] = 0;
 319                 } else {
 320                         for (i = 0; i <= 9; i++)
 321                                 svbi->service_lines[0][i] =
 322                                         svbi->service_lines[1][i] = 0;
 323
 324                         for (i = 22; i <= 23; i++)
 325                                 svbi->service_lines[0][i] =
 326                                         svbi->service_lines[1][i] = 0;
 327                 }
 328
 329                 for (i = 7; i <= 23; i++) {
 330                         for (x = 0; x <= 1; x++) {
 331                                 switch (svbi->service_lines[1-x][i]) {
 332                                 case V4L2_SLICED_TELETEXT_B:
 333                                         lcr[i] |= 1 << (4 * x);
 334                                         break;
 335                                 case V4L2_SLICED_WSS_625:
 336                                         lcr[i] |= 4 << (4 * x);
 337                                         break;
 338                                 case V4L2_SLICED_CAPTION_525:
 339                                         lcr[i] |= 6 << (4 * x);
 340                                         break;
 341                                 case V4L2_SLICED_VPS:
 342                                         lcr[i] |= 9 << (4 * x);
 343                                         break;
 344                                 }
 345                         }
 346                 }
 347
 348                 if (is_pal) {
 349                         for (x = 1, i = 0x424; i <= 0x434; i++, x++)
 350                                 cx18_av_write(cx, i, lcr[6 + x]);
 351                 } else {
 352                         for (x = 1, i = 0x424; i <= 0x430; i++, x++)
 353                                 cx18_av_write(cx, i, lcr[9 + x]);
 354                         for (i = 0x431; i <= 0x434; i++)
 355                                 cx18_av_write(cx, i, 0);
 356                 }
 357
 358                 cx18_av_write(cx, 0x43c, 0x16);
 359                 cx18_av_write(cx, 0x474, is_pal ? 0x2a : 0x22);
 360                 break;
 361         }
 362
 363         case VIDIOC_INT_DECODE_VBI_LINE:
 364         {
 365                 struct v4l2_decode_vbi_line *vbi = arg;
 366                 u8 *p = vbi->p;
 367                 int id1, id2, l, err = 0;
 368
 369                 if (p[0] || p[1] != 0xff || p[2] != 0xff ||
 370                     (p[3] != 0x55 && p[3] != 0x91)) {
 371                         vbi->line = vbi->type = 0;
 372                         break;
 373                 }
 374
 375                 p += 4;
 376                 id1 = p[-1];
 377                 id2 = p[0] & 0xf;
 378                 l = p[2] & 0x3f;
 379                 l += state->vbi_line_offset;
 380                 p += 4;
 381
 382                 switch (id2) {
 383                 case 1:
 384                         id2 = V4L2_SLICED_TELETEXT_B;
 385                         break;
 386                 case 4:
 387                         id2 = V4L2_SLICED_WSS_625;
 388                         break;
 389                 case 6:
 390                         id2 = V4L2_SLICED_CAPTION_525;
 391                         err = !odd_parity(p[0]) || !odd_parity(p[1]);
 392                         break;
 393                 case 9:
 394                         id2 = V4L2_SLICED_VPS;
 395                         if (decode_vps(p, p) != 0)
 396                                 err = 1;
 397                         break;
 398                 default:
 399                         id2 = 0;
 400                         err = 1;
 401                         break;
 402                 }
 403
 404                 vbi->type = err ? 0 : id2;
 405                 vbi->line = err ? 0 : l;
 406                 vbi->is_second_field = err ? 0 : (id1 == 0x55);
 407                 vbi->p = p;
 408                 break;
 409         }
 410         }
 411
 412         return 0;
 413 }