err.no 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_PAL) {
 112                         uv_lpf = 1;
 113                         comb = 0x20;
 114                         sc = 0x0a8263;
 115                 } else if (std == V4L2_STD_PAL_Nc) {
 116                         uv_lpf = 1;
 117                         comb = 0x20;
 118                         sc = 0x087da5;
 119                 } else { /* SECAM */
 120                         uv_lpf = 0;
 121                         comb = 0;
 122                         sc = 0x0a425f;
 123                 }
 124         } else {
 125                 hactive = 720;
 126                 hblank = 122;
 127                 vactive = 487;
 128                 luma_lpf = 1;
 129                 uv_lpf = 1;
 130                 vblank = 26;
 131                 vblank656 = 26;
 132
 133                 src_decimation = 0x21f;
 134                 if (std == V4L2_STD_PAL_60) {
 135                         burst = 0x5b;
 136                         luma_lpf = 2;
 137                         comb = 0x20;
 138                         sc = 0x0a8263;
 139                 } else if (std == V4L2_STD_PAL_M) {
 140                         burst = 0x61;
 141                         comb = 0x20;
 142                         sc = 555452;
 143                 } else {
 144                         burst = 0x5b;
 145                         comb = 0x66;
 146                         sc = 556063;
 147                 }
 148         }
 149
 150         /* DEBUG: Displays configured PLL frequency */
 151         pll_int = cx18_av_read(cx, 0x108);
 152         pll_frac = cx18_av_read4(cx, 0x10c) & 0x1ffffff;
 153         pll_post = cx18_av_read(cx, 0x109);
 154         CX18_DEBUG_INFO("PLL regs = int: %u, frac: %u, post: %u\n",
 155                         pll_int, pll_frac, pll_post);
 156
 157         if (pll_post) {
 158                 int fin, fsc;
 159                 int pll = 28636363L * ((((u64)pll_int) << 25) + pll_frac);
 160
 161                 pll >>= 25;
 162                 pll /= pll_post;
 163                 CX18_DEBUG_INFO("PLL = %d.%06d MHz\n",
 164                                         pll / 1000000, pll % 1000000);
 165                 CX18_DEBUG_INFO("PLL/8 = %d.%06d MHz\n",
 166                                         pll / 8000000, (pll / 8) % 1000000);
 167
 168                 fin = ((u64)src_decimation * pll) >> 12;
 169                 CX18_DEBUG_INFO("ADC Sampling freq = %d.%06d MHz\n",
 170                                         fin / 1000000, fin % 1000000);
 171
 172                 fsc = (((u64)sc) * pll) >> 24L;
 173                 CX18_DEBUG_INFO("Chroma sub-carrier freq = %d.%06d MHz\n",
 174                                         fsc / 1000000, fsc % 1000000);
 175
 176                 CX18_DEBUG_INFO("hblank %i, hactive %i, "
 177                         "vblank %i , vactive %i, vblank656 %i, src_dec %i,"
 178                         "burst 0x%02x, luma_lpf %i, uv_lpf %i, comb 0x%02x,"
 179                         " sc 0x%06x\n",
 180                         hblank, hactive, vblank, vactive, vblank656,
 181                         src_decimation, burst, luma_lpf, uv_lpf, comb, sc);
 182         }
 183
 184         /* Sets horizontal blanking delay and active lines */
 185         cx18_av_write(cx, 0x470, hblank);
 186         cx18_av_write(cx, 0x471, 0xff & (((hblank >> 8) & 0x3) |
 187                                                 (hactive << 4)));
 188         cx18_av_write(cx, 0x472, hactive >> 4);
 189
 190         /* Sets burst gate delay */
 191         cx18_av_write(cx, 0x473, burst);
 192
 193         /* Sets vertical blanking delay and active duration */
 194         cx18_av_write(cx, 0x474, vblank);
 195         cx18_av_write(cx, 0x475, 0xff & (((vblank >> 8) & 0x3) |
 196                                                 (vactive << 4)));
 197         cx18_av_write(cx, 0x476, vactive >> 4);
 198         cx18_av_write(cx, 0x477, vblank656);
 199
 200         /* Sets src decimation rate */
 201         cx18_av_write(cx, 0x478, 0xff & src_decimation);
 202         cx18_av_write(cx, 0x479, 0xff & (src_decimation >> 8));
 203
 204         /* Sets Luma and UV Low pass filters */
 205         cx18_av_write(cx, 0x47a, luma_lpf << 6 | ((uv_lpf << 4) & 0x30));
 206
 207         /* Enables comb filters */
 208         cx18_av_write(cx, 0x47b, comb);
 209
 210         /* Sets SC Step*/
 211         cx18_av_write(cx, 0x47c, sc);
 212         cx18_av_write(cx, 0x47d, 0xff & sc >> 8);
 213         cx18_av_write(cx, 0x47e, 0xff & sc >> 16);
 214
 215         /* Sets VBI parameters */
 216         if (std & V4L2_STD_625_50) {
 217                 cx18_av_write(cx, 0x47f, 0x01);
 218                 state->vbi_line_offset = 5;
 219         } else {
 220                 cx18_av_write(cx, 0x47f, 0x00);
 221                 state->vbi_line_offset = 8;
 222         }
 223 }
 224
 225 int cx18_av_vbi(struct cx18 *cx, unsigned int cmd, void *arg)
 226 {
 227         struct cx18_av_state *state = &cx->av_state;
 228         struct v4l2_format *fmt;
 229         struct v4l2_sliced_vbi_format *svbi;
 230
 231         switch (cmd) {
 232         case VIDIOC_G_FMT:
 233         {
 234                 static u16 lcr2vbi[] = {
 235                         0, V4L2_SLICED_TELETEXT_B, 0,   /* 1 */
 236                         0, V4L2_SLICED_WSS_625, 0,      /* 4 */
 237                         V4L2_SLICED_CAPTION_525,        /* 6 */
 238                         0, 0, V4L2_SLICED_VPS, 0, 0,    /* 9 */
 239                         0, 0, 0, 0
 240                 };
 241                 int is_pal = !(state->std & V4L2_STD_525_60);
 242                 int i;
 243
 244                 fmt = arg;
 245                 if (fmt->type != V4L2_BUF_TYPE_SLICED_VBI_CAPTURE)
 246                         return -EINVAL;
 247                 svbi = &fmt->fmt.sliced;
 248                 memset(svbi, 0, sizeof(*svbi));
 249                 /* we're done if raw VBI is active */
 250                 if ((cx18_av_read(cx, 0x404) & 0x10) == 0)
 251                         break;
 252
 253                 if (is_pal) {
 254                         for (i = 7; i <= 23; i++) {
 255                                 u8 v = cx18_av_read(cx, 0x424 + i - 7);
 256
 257                                 svbi->service_lines[0][i] = lcr2vbi[v >> 4];
 258                                 svbi->service_lines[1][i] = lcr2vbi[v & 0xf];
 259                                 svbi->service_set |= svbi->service_lines[0][i] |
 260                                         svbi->service_lines[1][i];
 261                         }
 262                 } else {
 263                         for (i = 10; i <= 21; i++) {
 264                                 u8 v = cx18_av_read(cx, 0x424 + i - 10);
 265
 266                                 svbi->service_lines[0][i] = lcr2vbi[v >> 4];
 267                                 svbi->service_lines[1][i] = lcr2vbi[v & 0xf];
 268                                 svbi->service_set |= svbi->service_lines[0][i] |
 269                                         svbi->service_lines[1][i];
 270                         }
 271                 }
 272                 break;
 273         }
 274
 275         case VIDIOC_S_FMT:
 276         {
 277                 int is_pal = !(state->std & V4L2_STD_525_60);
 278                 int vbi_offset = is_pal ? 1 : 0;
 279                 int i, x;
 280                 u8 lcr[24];
 281
 282                 fmt = arg;
 283                 if (fmt->type != V4L2_BUF_TYPE_SLICED_VBI_CAPTURE)
 284                         return -EINVAL;
 285                 svbi = &fmt->fmt.sliced;
 286                 if (svbi->service_set == 0) {
 287                         /* raw VBI */
 288                         memset(svbi, 0, sizeof(*svbi));
 289
 290                         /* Setup VBI */
 291                         cx18_av_vbi_setup(cx);
 292
 293                         /* VBI Offset */
 294                         cx18_av_write(cx, 0x47f, vbi_offset);
 295                         cx18_av_write(cx, 0x404, 0x2e);
 296                         break;
 297                 }
 298
 299                 for (x = 0; x <= 23; x++)
 300                         lcr[x] = 0x00;
 301
 302                 /* Setup VBI */
 303                 cx18_av_vbi_setup(cx);
 304
 305                 /* Sliced VBI */
 306                 cx18_av_write(cx, 0x404, 0x32); /* Ancillary data */
 307                 cx18_av_write(cx, 0x406, 0x13);
 308                 cx18_av_write(cx, 0x47f, vbi_offset);
 309
 310                 if (is_pal) {
 311                         for (i = 0; i <= 6; i++)
 312                                 svbi->service_lines[0][i] =
 313                                         svbi->service_lines[1][i] = 0;
 314                 } else {
 315                         for (i = 0; i <= 9; i++)
 316                                 svbi->service_lines[0][i] =
 317                                         svbi->service_lines[1][i] = 0;
 318
 319                         for (i = 22; i <= 23; i++)
 320                                 svbi->service_lines[0][i] =
 321                                         svbi->service_lines[1][i] = 0;
 322                 }
 323
 324                 for (i = 7; i <= 23; i++) {
 325                         for (x = 0; x <= 1; x++) {
 326                                 switch (svbi->service_lines[1-x][i]) {
 327                                 case V4L2_SLICED_TELETEXT_B:
 328                                         lcr[i] |= 1 << (4 * x);
 329                                         break;
 330                                 case V4L2_SLICED_WSS_625:
 331                                         lcr[i] |= 4 << (4 * x);
 332                                         break;
 333                                 case V4L2_SLICED_CAPTION_525:
 334                                         lcr[i] |= 6 << (4 * x);
 335                                         break;
 336                                 case V4L2_SLICED_VPS:
 337                                         lcr[i] |= 9 << (4 * x);
 338                                         break;
 339                                 }
 340                         }
 341                 }
 342
 343                 if (is_pal) {
 344                         for (x = 1, i = 0x424; i <= 0x434; i++, x++)
 345                                 cx18_av_write(cx, i, lcr[6 + x]);
 346                 } else {
 347                         for (x = 1, i = 0x424; i <= 0x430; i++, x++)
 348                                 cx18_av_write(cx, i, lcr[9 + x]);
 349                         for (i = 0x431; i <= 0x434; i++)
 350                                 cx18_av_write(cx, i, 0);
 351                 }
 352
 353                 cx18_av_write(cx, 0x43c, 0x16);
 354                 cx18_av_write(cx, 0x474, is_pal ? 0x2a : 0x22);
 355                 break;
 356         }
 357
 358         case VIDIOC_INT_DECODE_VBI_LINE:
 359         {
 360                 struct v4l2_decode_vbi_line *vbi = arg;
 361                 u8 *p = vbi->p;
 362                 int id1, id2, l, err = 0;
 363
 364                 if (p[0] || p[1] != 0xff || p[2] != 0xff ||
 365                     (p[3] != 0x55 && p[3] != 0x91)) {
 366                         vbi->line = vbi->type = 0;
 367                         break;
 368                 }
 369
 370                 p += 4;
 371                 id1 = p[-1];
 372                 id2 = p[0] & 0xf;
 373                 l = p[2] & 0x3f;
 374                 l += state->vbi_line_offset;
 375                 p += 4;
 376
 377                 switch (id2) {
 378                 case 1:
 379                         id2 = V4L2_SLICED_TELETEXT_B;
 380                         break;
 381                 case 4:
 382                         id2 = V4L2_SLICED_WSS_625;
 383                         break;
 384                 case 6:
 385                         id2 = V4L2_SLICED_CAPTION_525;
 386                         err = !odd_parity(p[0]) || !odd_parity(p[1]);
 387                         break;
 388                 case 9:
 389                         id2 = V4L2_SLICED_VPS;
 390                         if (decode_vps(p, p) != 0)
 391                                 err = 1;
 392                         break;
 393                 default:
 394                         id2 = 0;
 395                         err = 1;
 396                         break;
 397                 }
 398
 399                 vbi->type = err ? 0 : id2;
 400                 vbi->line = err ? 0 : l;
 401                 vbi->is_second_field = err ? 0 : (id1 == 0x55);
 402                 vbi->p = p;
 403                 break;
 404         }
 405         }
 406
 407         return 0;
 408 }