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,
 296                            u32 input, u32 output, u32 config)
 297 {
 298         struct bt819 *decoder = to_bt819(sd);
 299
 300         v4l2_dbg(1, debug, sd, "set input %x\n", input);
 301
 302         if (input < 0 || input > 7)
 303                 return -EINVAL;
 304
 305         if (sd->v4l2_dev == NULL || sd->v4l2_dev->notify == NULL)
 306                 v4l2_err(sd, "no notify found!\n");
 307
 308         if (decoder->input != input) {
 309                 v4l2_subdev_notify(sd, BT819_FIFO_RESET_LOW, 0);
 310                 decoder->input = input;
 311                 /* select mode */
 312                 if (decoder->input == 0) {
 313                         bt819_setbit(decoder, 0x0b, 6, 0);
 314                         bt819_setbit(decoder, 0x1a, 1, 1);
 315                 } else {
 316                         bt819_setbit(decoder, 0x0b, 6, 1);
 317                         bt819_setbit(decoder, 0x1a, 1, 0);
 318                 }
 319                 v4l2_subdev_notify(sd, BT819_FIFO_RESET_HIGH, 0);
 320         }
 321         return 0;
 322 }
 323
 324 static int bt819_s_stream(struct v4l2_subdev *sd, int enable)
 325 {
 326         struct bt819 *decoder = to_bt819(sd);
 327
 328         v4l2_dbg(1, debug, sd, "enable output %x\n", enable);
 329
 330         if (decoder->enable != enable) {
 331                 decoder->enable = enable;
 332                 bt819_setbit(decoder, 0x16, 7, !enable);
 333         }
 334         return 0;
 335 }
 336
 337 static int bt819_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
 338 {
 339         switch (qc->id) {
 340         case V4L2_CID_BRIGHTNESS:
 341                 v4l2_ctrl_query_fill(qc, -128, 127, 1, 0);
 342                 break;
 343
 344         case V4L2_CID_CONTRAST:
 345                 v4l2_ctrl_query_fill(qc, 0, 511, 1, 256);
 346                 break;
 347
 348         case V4L2_CID_SATURATION:
 349                 v4l2_ctrl_query_fill(qc, 0, 511, 1, 256);
 350                 break;
 351
 352         case V4L2_CID_HUE:
 353                 v4l2_ctrl_query_fill(qc, -128, 127, 1, 0);
 354                 break;
 355
 356         default:
 357                 return -EINVAL;
 358         }
 359         return 0;
 360 }
 361
 362 static int bt819_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 363 {
 364         struct bt819 *decoder = to_bt819(sd);
 365         int temp;
 366
 367         switch (ctrl->id) {
 368         case V4L2_CID_BRIGHTNESS:
 369                 if (decoder->bright == ctrl->value)
 370                         break;
 371                 decoder->bright = ctrl->value;
 372                 bt819_write(decoder, 0x0a, decoder->bright);
 373                 break;
 374
 375         case V4L2_CID_CONTRAST:
 376                 if (decoder->contrast == ctrl->value)
 377                         break;
 378                 decoder->contrast = ctrl->value;
 379                 bt819_write(decoder, 0x0c, decoder->contrast & 0xff);
 380                 bt819_setbit(decoder, 0x0b, 2, ((decoder->contrast >> 8) & 0x01));
 381                 break;
 382
 383         case V4L2_CID_SATURATION:
 384                 if (decoder->sat == ctrl->value)
 385                         break;
 386                 decoder->sat = ctrl->value;
 387                 bt819_write(decoder, 0x0d, (decoder->sat >> 7) & 0xff);
 388                 bt819_setbit(decoder, 0x0b, 1, ((decoder->sat >> 15) & 0x01));
 389
 390                 /* Ratio between U gain and V gain must stay the same as
 391                    the ratio between the default U and V gain values. */
 392                 temp = (decoder->sat * 180) / 254;
 393                 bt819_write(decoder, 0x0e, (temp >> 7) & 0xff);
 394                 bt819_setbit(decoder, 0x0b, 0, (temp >> 15) & 0x01);
 395                 break;
 396
 397         case V4L2_CID_HUE:
 398                 if (decoder->hue == ctrl->value)
 399                         break;
 400                 decoder->hue = ctrl->value;
 401                 bt819_write(decoder, 0x0f, decoder->hue);
 402                 break;
 403
 404         default:
 405                 return -EINVAL;
 406         }
 407         return 0;
 408 }
 409
 410 static int bt819_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 411 {
 412         struct bt819 *decoder = to_bt819(sd);
 413
 414         switch (ctrl->id) {
 415         case V4L2_CID_BRIGHTNESS:
 416                 ctrl->value = decoder->bright;
 417                 break;
 418         case V4L2_CID_CONTRAST:
 419                 ctrl->value = decoder->contrast;
 420                 break;
 421         case V4L2_CID_SATURATION:
 422                 ctrl->value = decoder->sat;
 423                 break;
 424         case V4L2_CID_HUE:
 425                 ctrl->value = decoder->hue;
 426                 break;
 427         default:
 428                 return -EINVAL;
 429         }
 430         return 0;
 431 }
 432
 433 static int bt819_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
 434 {
 435         struct bt819 *decoder = to_bt819(sd);
 436         struct i2c_client *client = v4l2_get_subdevdata(sd);
 437
 438         return v4l2_chip_ident_i2c_client(client, chip, decoder->ident, 0);
 439 }
 440
 441 /* ----------------------------------------------------------------------- */
 442
 443 static const struct v4l2_subdev_core_ops bt819_core_ops = {
 444         .g_chip_ident = bt819_g_chip_ident,
 445         .g_ctrl = bt819_g_ctrl,
 446         .s_ctrl = bt819_s_ctrl,
 447         .queryctrl = bt819_queryctrl,
 448         .s_std = bt819_s_std,
 449 };
 450
 451 static const struct v4l2_subdev_video_ops bt819_video_ops = {
 452         .s_routing = bt819_s_routing,
 453         .s_stream = bt819_s_stream,
 454         .querystd = bt819_querystd,
 455         .g_input_status = bt819_g_input_status,
 456 };
 457
 458 static const struct v4l2_subdev_ops bt819_ops = {
 459         .core = &bt819_core_ops,
 460         .video = &bt819_video_ops,
 461 };
 462
 463 /* ----------------------------------------------------------------------- */
 464
 465 static int bt819_probe(struct i2c_client *client,
 466                         const struct i2c_device_id *id)
 467 {
 468         int i, ver;
 469         struct bt819 *decoder;
 470         struct v4l2_subdev *sd;
 471         const char *name;
 472
 473         /* Check if the adapter supports the needed features */
 474         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 475                 return -ENODEV;
 476
 477         decoder = kzalloc(sizeof(struct bt819), GFP_KERNEL);
 478         if (decoder == NULL)
 479                 return -ENOMEM;
 480         sd = &decoder->sd;
 481         v4l2_i2c_subdev_init(sd, client, &bt819_ops);
 482
 483         ver = bt819_read(decoder, 0x17);
 484         switch (ver & 0xf0) {
 485         case 0x70:
 486                 name = "bt819a";
 487                 decoder->ident = V4L2_IDENT_BT819A;
 488                 break;
 489         case 0x60:
 490                 name = "bt817a";
 491                 decoder->ident = V4L2_IDENT_BT817A;
 492                 break;
 493         case 0x20:
 494                 name = "bt815a";
 495                 decoder->ident = V4L2_IDENT_BT815A;
 496                 break;
 497         default:
 498                 v4l2_dbg(1, debug, sd,
 499                         "unknown chip version 0x%02x\n", ver);
 500                 return -ENODEV;
 501         }
 502
 503         v4l_info(client, "%s found @ 0x%x (%s)\n", name,
 504                         client->addr << 1, client->adapter->name);
 505
 506         decoder->norm = V4L2_STD_NTSC;
 507         decoder->input = 0;
 508         decoder->enable = 1;
 509         decoder->bright = 0;
 510         decoder->contrast = 0xd8;       /* 100% of original signal */
 511         decoder->hue = 0;
 512         decoder->sat = 0xfe;            /* 100% of original signal */
 513
 514         i = bt819_init(sd);
 515         if (i < 0)
 516                 v4l2_dbg(1, debug, sd, "init status %d\n", i);
 517         return 0;
 518 }
 519
 520 static int bt819_remove(struct i2c_client *client)
 521 {
 522         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 523
 524         v4l2_device_unregister_subdev(sd);
 525         kfree(to_bt819(sd));
 526         return 0;
 527 }
 528
 529 /* ----------------------------------------------------------------------- */
 530
 531 static const struct i2c_device_id bt819_id[] = {
 532         { "bt819a", 0 },
 533         { "bt817a", 0 },
 534         { "bt815a", 0 },
 535         { }
 536 };
 537 MODULE_DEVICE_TABLE(i2c, bt819_id);
 538
 539 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
 540         .name = "bt819",
 541         .probe = bt819_probe,
 542         .remove = bt819_remove,
 543         .id_table = bt819_id,
 544 };