git.oblomov.eu Git - linux-2.6/blob - drivers/media/video/bt819.c

   1 /*
   2  *  bt819 - BT819A VideoStream Decoder (Rockwell Part)
   3  *
   4  * Copyright (C) 1999 Mike Bernson <mike@mlb.org>
   5  * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
   6  *
   7  * Modifications for LML33/DC10plus unified driver
   8  * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
   9  *
  10  * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
  11  *    - moved over to linux>=2.4.x i2c protocol (9/9/2002)
  12  *
  13  * This code was modify/ported from the saa7111 driver written
  14  * by Dave Perks.
  15  *
  16  * This program is free software; you can redistribute it and/or modify
  17  * it under the terms of the GNU General Public License as published by
  18  * the Free Software Foundation; either version 2 of the License, or
  19  * (at your option) any later version.
  20  *
  21  * This program is distributed in the hope that it will be useful,
  22  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  23  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24  * GNU General Public License for more details.
  25  *
  26  * You should have received a copy of the GNU General Public License
  27  * along with this program; if not, write to the Free Software
  28  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  29  */
  30
  31 #include <linux/module.h>
  32 #include <linux/types.h>
  33 #include <linux/ioctl.h>
  34 #include <linux/delay.h>
  35 #include <linux/i2c.h>
  36 #include <linux/i2c-id.h>
  37 #include <linux/videodev2.h>
  38 #include <media/v4l2-device.h>
  39 #include <media/v4l2-chip-ident.h>
  40 #include <media/v4l2-i2c-drv.h>
  41 #include <media/bt819.h>
  42
  43 MODULE_DESCRIPTION("Brooktree-819 video decoder driver");
  44 MODULE_AUTHOR("Mike Bernson & Dave Perks");
  45 MODULE_LICENSE("GPL");
  46
  47 static int debug;
  48 module_param(debug, int, 0);
  49 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  50
  51
  52 /* ----------------------------------------------------------------------- */
  53
  54 struct bt819 {
  55         struct v4l2_subdev sd;
  56         unsigned char reg[32];
  57
  58         v4l2_std_id norm;
  59         int ident;
  60         int input;
  61         int enable;
  62         int bright;
  63         int contrast;
  64         int hue;
  65         int sat;
  66 };
  67
  68 static inline struct bt819 *to_bt819(struct v4l2_subdev *sd)
  69 {
  70         return container_of(sd, struct bt819, sd);
  71 }
  72
  73 struct timing {
  74         int hactive;
  75         int hdelay;
  76         int vactive;
  77         int vdelay;
  78         int hscale;
  79         int vscale;
  80 };
  81
  82 /* for values, see the bt819 datasheet */
  83 static struct timing timing_data[] = {
  84         {864 - 24, 20, 625 - 2, 1, 0x0504, 0x0000},
  85         {858 - 24, 20, 525 - 2, 1, 0x00f8, 0x0000},
  86 };
  87
  88 /* ----------------------------------------------------------------------- */
  89
  90 static inline int bt819_write(struct bt819 *decoder, u8 reg, u8 value)
  91 {
  92         struct i2c_client *client = v4l2_get_subdevdata(&decoder->sd);
  93
  94         decoder->reg[reg] = value;
  95         return i2c_smbus_write_byte_data(client, reg, value);
  96 }
  97
  98 static inline int bt819_setbit(struct bt819 *decoder, u8 reg, u8 bit, u8 value)
  99 {
 100         return bt819_write(decoder, reg,
 101                 (decoder->reg[reg] & ~(1 << bit)) | (value ? (1 << bit) : 0));
 102 }
 103
 104 static int bt819_write_block(struct bt819 *decoder, const u8 *data, unsigned int len)
 105 {
 106         struct i2c_client *client = v4l2_get_subdevdata(&decoder->sd);
 107         int ret = -1;
 108         u8 reg;
 109
 110         /* the bt819 has an autoincrement function, use it if
 111          * the adapter understands raw I2C */
 112         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 113                 /* do raw I2C, not smbus compatible */
 114                 u8 block_data[32];
 115                 int block_len;
 116
 117                 while (len >= 2) {
 118                         block_len = 0;
 119                         block_data[block_len++] = reg = data[0];
 120                         do {
 121                                 block_data[block_len++] =
 122                                     decoder->reg[reg++] = data[1];
 123                                 len -= 2;
 124                                 data += 2;
 125                         } while (len >= 2 && data[0] == reg && block_len < 32);
 126                         ret = i2c_master_send(client, block_data, block_len);
 127                         if (ret < 0)
 128                                 break;
 129                 }
 130         } else {
 131                 /* do some slow I2C emulation kind of thing */
 132                 while (len >= 2) {
 133                         reg = *data++;
 134                         ret = bt819_write(decoder, reg, *data++);
 135                         if (ret < 0)
 136                                 break;
 137                         len -= 2;
 138                 }
 139         }
 140
 141         return ret;
 142 }
 143
 144 static inline int bt819_read(struct bt819 *decoder, u8 reg)
 145 {
 146         struct i2c_client *client = v4l2_get_subdevdata(&decoder->sd);
 147
 148         return i2c_smbus_read_byte_data(client, reg);
 149 }
 150
 151 static int bt819_init(struct v4l2_subdev *sd)
 152 {
 153         static unsigned char init[] = {
 154                 /*0x1f, 0x00,*/     /* Reset */
 155                 0x01, 0x59,     /* 0x01 input format */
 156                 0x02, 0x00,     /* 0x02 temporal decimation */
 157                 0x03, 0x12,     /* 0x03 Cropping msb */
 158                 0x04, 0x16,     /* 0x04 Vertical Delay, lsb */
 159                 0x05, 0xe0,     /* 0x05 Vertical Active lsb */
 160                 0x06, 0x80,     /* 0x06 Horizontal Delay lsb */
 161                 0x07, 0xd0,     /* 0x07 Horizontal Active lsb */
 162                 0x08, 0x00,     /* 0x08 Horizontal Scaling msb */
 163                 0x09, 0xf8,     /* 0x09 Horizontal Scaling lsb */
 164                 0x0a, 0x00,     /* 0x0a Brightness control */
 165                 0x0b, 0x30,     /* 0x0b Miscellaneous control */
 166                 0x0c, 0xd8,     /* 0x0c Luma Gain lsb */
 167                 0x0d, 0xfe,     /* 0x0d Chroma Gain (U) lsb */
 168                 0x0e, 0xb4,     /* 0x0e Chroma Gain (V) msb */
 169                 0x0f, 0x00,     /* 0x0f Hue control */
 170                 0x12, 0x04,     /* 0x12 Output Format */
 171                 0x13, 0x20,     /* 0x13 Vertial Scaling msb 0x00
 172                                            chroma comb OFF, line drop scaling, interlace scaling
 173                                            BUG? Why does turning the chroma comb on fuck up color?
 174                                            Bug in the bt819 stepping on my board?
 175                                         */
 176                 0x14, 0x00,     /* 0x14 Vertial Scaling lsb */
 177                 0x16, 0x07,     /* 0x16 Video Timing Polarity
 178                                            ACTIVE=active low
 179                                            FIELD: high=odd,
 180                                            vreset=active high,
 181                                            hreset=active high */
 182                 0x18, 0x68,     /* 0x18 AGC Delay */
 183                 0x19, 0x5d,     /* 0x19 Burst Gate Delay */
 184                 0x1a, 0x80,     /* 0x1a ADC Interface */
 185         };
 186
 187         struct bt819 *decoder = to_bt819(sd);
 188         struct timing *timing = &timing_data[(decoder->norm & V4L2_STD_525_60) ? 1 : 0];
 189
 190         init[0x03 * 2 - 1] =
 191             (((timing->vdelay >> 8) & 0x03) << 6) |
 192             (((timing->vactive >> 8) & 0x03) << 4) |
 193             (((timing->hdelay >> 8) & 0x03) << 2) |
 194             ((timing->hactive >> 8) & 0x03);
 195         init[0x04 * 2 - 1] = timing->vdelay & 0xff;
 196         init[0x05 * 2 - 1] = timing->vactive & 0xff;
 197         init[0x06 * 2 - 1] = timing->hdelay & 0xff;
 198         init[0x07 * 2 - 1] = timing->hactive & 0xff;
 199         init[0x08 * 2 - 1] = timing->hscale >> 8;
 200         init[0x09 * 2 - 1] = timing->hscale & 0xff;
 201         /* 0x15 in array is address 0x19 */
 202         init[0x15 * 2 - 1] = (decoder->norm & V4L2_STD_625_50) ? 115 : 93;      /* Chroma burst delay */
 203         /* reset */
 204         bt819_write(decoder, 0x1f, 0x00);
 205         mdelay(1);
 206
 207         /* init */
 208         return bt819_write_block(decoder, init, sizeof(init));
 209 }
 210
 211 /* ----------------------------------------------------------------------- */
 212
 213 static int bt819_status(struct v4l2_subdev *sd, u32 *pstatus, v4l2_std_id *pstd)
 214 {
 215         struct bt819 *decoder = to_bt819(sd);
 216         int status = bt819_read(decoder, 0x00);
 217         int res = V4L2_IN_ST_NO_SIGNAL;
 218         v4l2_std_id std;
 219
 220         if ((status & 0x80))
 221                 res = 0;
 222
 223         if ((status & 0x10))
 224                 std = V4L2_STD_PAL;
 225         else
 226                 std = V4L2_STD_NTSC;
 227         if (pstd)
 228                 *pstd = std;
 229         if (pstatus)
 230                 *pstatus = status;
 231
 232         v4l2_dbg(1, debug, sd, "get status %x\n", status);
 233         return 0;
 234 }
 235
 236 static int bt819_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
 237 {
 238         return bt819_status(sd, NULL, std);
 239 }
 240
 241 static int bt819_g_input_status(struct v4l2_subdev *sd, u32 *status)
 242 {
 243         return bt819_status(sd, status, NULL);
 244 }
 245
 246 static int bt819_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
 247 {
 248         struct bt819 *decoder = to_bt819(sd);
 249         struct timing *timing = NULL;
 250
 251         v4l2_dbg(1, debug, sd, "set norm %llx\n", (unsigned long long)std);
 252
 253         if (sd->v4l2_dev == NULL || sd->v4l2_dev->notify == NULL)
 254                 v4l2_err(sd, "no notify found!\n");
 255
 256         if (std & V4L2_STD_NTSC) {
 257                 v4l2_subdev_notify(sd, BT819_FIFO_RESET_LOW, 0);
 258                 bt819_setbit(decoder, 0x01, 0, 1);
 259                 bt819_setbit(decoder, 0x01, 1, 0);
 260                 bt819_setbit(decoder, 0x01, 5, 0);
 261                 bt819_write(decoder, 0x18, 0x68);
 262                 bt819_write(decoder, 0x19, 0x5d);
 263                 /* bt819_setbit(decoder, 0x1a,  5, 1); */
 264                 timing = &timing_data[1];
 265         } else if (std & V4L2_STD_PAL) {
 266                 v4l2_subdev_notify(sd, BT819_FIFO_RESET_LOW, 0);
 267                 bt819_setbit(decoder, 0x01, 0, 1);
 268                 bt819_setbit(decoder, 0x01, 1, 1);
 269                 bt819_setbit(decoder, 0x01, 5, 1);
 270                 bt819_write(decoder, 0x18, 0x7f);
 271                 bt819_write(decoder, 0x19, 0x72);
 272                 /* bt819_setbit(decoder, 0x1a,  5, 0); */
 273                 timing = &timing_data[0];
 274         } else {
 275                 v4l2_dbg(1, debug, sd, "unsupported norm %llx\n",
 276                                 (unsigned long long)std);
 277                 return -EINVAL;
 278         }
 279         bt819_write(decoder, 0x03,
 280                         (((timing->vdelay >> 8) & 0x03) << 6) |
 281                         (((timing->vactive >> 8) & 0x03) << 4) |
 282                         (((timing->hdelay >> 8) & 0x03) << 2) |
 283                         ((timing->hactive >> 8) & 0x03));
 284         bt819_write(decoder, 0x04, timing->vdelay & 0xff);
 285         bt819_write(decoder, 0x05, timing->vactive & 0xff);
 286         bt819_write(decoder, 0x06, timing->hdelay & 0xff);
 287         bt819_write(decoder, 0x07, timing->hactive & 0xff);
 288         bt819_write(decoder, 0x08, (timing->hscale >> 8) & 0xff);
 289         bt819_write(decoder, 0x09, timing->hscale & 0xff);
 290         decoder->norm = std;
 291         v4l2_subdev_notify(sd, BT819_FIFO_RESET_HIGH, 0);
 292         return 0;
 293 }
 294
 295 static int bt819_s_routing(struct v4l2_subdev *sd, const struct v4l2_routing *route)
 296 {
 297         struct bt819 *decoder = to_bt819(sd);
 298
 299         v4l2_dbg(1, debug, sd, "set input %x\n", route->input);
 300
 301         if (route->input < 0 || route->input > 7)
 302                 return -EINVAL;
 303
 304         if (sd->v4l2_dev == NULL || sd->v4l2_dev->notify == NULL)
 305                 v4l2_err(sd, "no notify found!\n");
 306
 307         if (decoder->input != route->input) {
 308                 v4l2_subdev_notify(sd, BT819_FIFO_RESET_LOW, 0);
 309                 decoder->input = route->input;
 310                 /* select mode */
 311                 if (decoder->input == 0) {
 312                         bt819_setbit(decoder, 0x0b, 6, 0);
 313                         bt819_setbit(decoder, 0x1a, 1, 1);
 314                 } else {
 315                         bt819_setbit(decoder, 0x0b, 6, 1);
 316                         bt819_setbit(decoder, 0x1a, 1, 0);
 317                 }
 318                 v4l2_subdev_notify(sd, BT819_FIFO_RESET_HIGH, 0);
 319         }
 320         return 0;
 321 }
 322
 323 static int bt819_s_stream(struct v4l2_subdev *sd, int enable)
 324 {
 325         struct bt819 *decoder = to_bt819(sd);
 326
 327         v4l2_dbg(1, debug, sd, "enable output %x\n", enable);
 328
 329         if (decoder->enable != enable) {
 330                 decoder->enable = enable;
 331                 bt819_setbit(decoder, 0x16, 7, !enable);
 332         }
 333         return 0;
 334 }
 335
 336 static int bt819_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
 337 {
 338         switch (qc->id) {
 339         case V4L2_CID_BRIGHTNESS:
 340                 v4l2_ctrl_query_fill(qc, -128, 127, 1, 0);
 341                 break;
 342
 343         case V4L2_CID_CONTRAST:
 344                 v4l2_ctrl_query_fill(qc, 0, 511, 1, 256);
 345                 break;
 346
 347         case V4L2_CID_SATURATION:
 348                 v4l2_ctrl_query_fill(qc, 0, 511, 1, 256);
 349                 break;
 350
 351         case V4L2_CID_HUE:
 352                 v4l2_ctrl_query_fill(qc, -128, 127, 1, 0);
 353                 break;
 354
 355         default:
 356                 return -EINVAL;
 357         }
 358         return 0;
 359 }
 360
 361 static int bt819_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 362 {
 363         struct bt819 *decoder = to_bt819(sd);
 364         int temp;
 365
 366         switch (ctrl->id) {
 367         case V4L2_CID_BRIGHTNESS:
 368                 if (decoder->bright == ctrl->value)
 369                         break;
 370                 decoder->bright = ctrl->value;
 371                 bt819_write(decoder, 0x0a, decoder->bright);
 372                 break;
 373
 374         case V4L2_CID_CONTRAST:
 375                 if (decoder->contrast == ctrl->value)
 376                         break;
 377                 decoder->contrast = ctrl->value;
 378                 bt819_write(decoder, 0x0c, decoder->contrast & 0xff);
 379                 bt819_setbit(decoder, 0x0b, 2, ((decoder->contrast >> 8) & 0x01));
 380                 break;
 381
 382         case V4L2_CID_SATURATION:
 383                 if (decoder->sat == ctrl->value)
 384                         break;
 385                 decoder->sat = ctrl->value;
 386                 bt819_write(decoder, 0x0d, (decoder->sat >> 7) & 0xff);
 387                 bt819_setbit(decoder, 0x0b, 1, ((decoder->sat >> 15) & 0x01));
 388
 389                 /* Ratio between U gain and V gain must stay the same as
 390                    the ratio between the default U and V gain values. */
 391                 temp = (decoder->sat * 180) / 254;
 392                 bt819_write(decoder, 0x0e, (temp >> 7) & 0xff);
 393                 bt819_setbit(decoder, 0x0b, 0, (temp >> 15) & 0x01);
 394                 break;
 395
 396         case V4L2_CID_HUE:
 397                 if (decoder->hue == ctrl->value)
 398                         break;
 399                 decoder->hue = ctrl->value;
 400                 bt819_write(decoder, 0x0f, decoder->hue);
 401                 break;
 402
 403         default:
 404                 return -EINVAL;
 405         }
 406         return 0;
 407 }
 408
 409 static int bt819_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 410 {
 411         struct bt819 *decoder = to_bt819(sd);
 412
 413         switch (ctrl->id) {
 414         case V4L2_CID_BRIGHTNESS:
 415                 ctrl->value = decoder->bright;
 416                 break;
 417         case V4L2_CID_CONTRAST:
 418                 ctrl->value = decoder->contrast;
 419                 break;
 420         case V4L2_CID_SATURATION:
 421                 ctrl->value = decoder->sat;
 422                 break;
 423         case V4L2_CID_HUE:
 424                 ctrl->value = decoder->hue;
 425                 break;
 426         default:
 427                 return -EINVAL;
 428         }
 429         return 0;
 430 }
 431
 432 static int bt819_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
 433 {
 434         struct bt819 *decoder = to_bt819(sd);
 435         struct i2c_client *client = v4l2_get_subdevdata(sd);
 436
 437         return v4l2_chip_ident_i2c_client(client, chip, decoder->ident, 0);
 438 }
 439
 440 /* ----------------------------------------------------------------------- */
 441
 442 static const struct v4l2_subdev_core_ops bt819_core_ops = {
 443         .g_chip_ident = bt819_g_chip_ident,
 444         .g_ctrl = bt819_g_ctrl,
 445         .s_ctrl = bt819_s_ctrl,
 446         .queryctrl = bt819_queryctrl,
 447 };
 448
 449 static const struct v4l2_subdev_tuner_ops bt819_tuner_ops = {
 450         .s_std = bt819_s_std,
 451 };
 452
 453 static const struct v4l2_subdev_video_ops bt819_video_ops = {
 454         .s_routing = bt819_s_routing,
 455         .s_stream = bt819_s_stream,
 456         .querystd = bt819_querystd,
 457         .g_input_status = bt819_g_input_status,
 458 };
 459
 460 static const struct v4l2_subdev_ops bt819_ops = {
 461         .core = &bt819_core_ops,
 462         .tuner = &bt819_tuner_ops,
 463         .video = &bt819_video_ops,
 464 };
 465
 466 /* ----------------------------------------------------------------------- */
 467
 468 static int bt819_probe(struct i2c_client *client,
 469                         const struct i2c_device_id *id)
 470 {
 471         int i, ver;
 472         struct bt819 *decoder;
 473         struct v4l2_subdev *sd;
 474         const char *name;
 475
 476         /* Check if the adapter supports the needed features */
 477         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 478                 return -ENODEV;
 479
 480         decoder = kzalloc(sizeof(struct bt819), GFP_KERNEL);
 481         if (decoder == NULL)
 482                 return -ENOMEM;
 483         sd = &decoder->sd;
 484         v4l2_i2c_subdev_init(sd, client, &bt819_ops);
 485
 486         ver = bt819_read(decoder, 0x17);
 487         switch (ver & 0xf0) {
 488         case 0x70:
 489                 name = "bt819a";
 490                 decoder->ident = V4L2_IDENT_BT819A;
 491                 break;
 492         case 0x60:
 493                 name = "bt817a";
 494                 decoder->ident = V4L2_IDENT_BT817A;
 495                 break;
 496         case 0x20:
 497                 name = "bt815a";
 498                 decoder->ident = V4L2_IDENT_BT815A;
 499                 break;
 500         default:
 501                 v4l2_dbg(1, debug, sd,
 502                         "unknown chip version 0x%02x\n", ver);
 503                 return -ENODEV;
 504         }
 505
 506         v4l_info(client, "%s found @ 0x%x (%s)\n", name,
 507                         client->addr << 1, client->adapter->name);
 508
 509         decoder->norm = V4L2_STD_NTSC;
 510         decoder->input = 0;
 511         decoder->enable = 1;
 512         decoder->bright = 0;
 513         decoder->contrast = 0xd8;       /* 100% of original signal */
 514         decoder->hue = 0;
 515         decoder->sat = 0xfe;            /* 100% of original signal */
 516
 517         i = bt819_init(sd);
 518         if (i < 0)
 519                 v4l2_dbg(1, debug, sd, "init status %d\n", i);
 520         return 0;
 521 }
 522
 523 static int bt819_remove(struct i2c_client *client)
 524 {
 525         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 526
 527         v4l2_device_unregister_subdev(sd);
 528         kfree(to_bt819(sd));
 529         return 0;
 530 }
 531
 532 /* ----------------------------------------------------------------------- */
 533
 534 static const struct i2c_device_id bt819_id[] = {
 535         { "bt819a", 0 },
 536         { "bt817a", 0 },
 537         { "bt815a", 0 },
 538         { }
 539 };
 540 MODULE_DEVICE_TABLE(i2c, bt819_id);
 541
 542 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
 543         .name = "bt819",
 544         .probe = bt819_probe,
 545         .remove = bt819_remove,
 546         .id_table = bt819_id,
 547 };