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 <asm/uaccess.h>
  36 #include <linux/i2c.h>
  37 #include <linux/i2c-id.h>
  38 #include <linux/videodev2.h>
  39 #include <media/v4l2-device.h>
  40 #include <media/v4l2-chip-ident.h>
  41 #include <media/v4l2-i2c-drv.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", std);
 252
 253         if (std & V4L2_STD_NTSC) {
 254                 bt819_setbit(decoder, 0x01, 0, 1);
 255                 bt819_setbit(decoder, 0x01, 1, 0);
 256                 bt819_setbit(decoder, 0x01, 5, 0);
 257                 bt819_write(decoder, 0x18, 0x68);
 258                 bt819_write(decoder, 0x19, 0x5d);
 259                 /* bt819_setbit(decoder, 0x1a,  5, 1); */
 260                 timing = &timing_data[1];
 261         } else if (std & V4L2_STD_PAL) {
 262                 bt819_setbit(decoder, 0x01, 0, 1);
 263                 bt819_setbit(decoder, 0x01, 1, 1);
 264                 bt819_setbit(decoder, 0x01, 5, 1);
 265                 bt819_write(decoder, 0x18, 0x7f);
 266                 bt819_write(decoder, 0x19, 0x72);
 267                 /* bt819_setbit(decoder, 0x1a,  5, 0); */
 268                 timing = &timing_data[0];
 269         } else {
 270                 v4l2_dbg(1, debug, sd, "unsupported norm %llx\n", std);
 271                 return -EINVAL;
 272         }
 273         bt819_write(decoder, 0x03,
 274                         (((timing->vdelay >> 8) & 0x03) << 6) |
 275                         (((timing->vactive >> 8) & 0x03) << 4) |
 276                         (((timing->hdelay >> 8) & 0x03) << 2) |
 277                         ((timing->hactive >> 8) & 0x03));
 278         bt819_write(decoder, 0x04, timing->vdelay & 0xff);
 279         bt819_write(decoder, 0x05, timing->vactive & 0xff);
 280         bt819_write(decoder, 0x06, timing->hdelay & 0xff);
 281         bt819_write(decoder, 0x07, timing->hactive & 0xff);
 282         bt819_write(decoder, 0x08, (timing->hscale >> 8) & 0xff);
 283         bt819_write(decoder, 0x09, timing->hscale & 0xff);
 284         decoder->norm = std;
 285         return 0;
 286 }
 287
 288 static int bt819_s_routing(struct v4l2_subdev *sd, const struct v4l2_routing *route)
 289 {
 290         struct bt819 *decoder = to_bt819(sd);
 291
 292         v4l2_dbg(1, debug, sd, "set input %x\n", route->input);
 293
 294         if (route->input < 0 || route->input > 7)
 295                 return -EINVAL;
 296
 297         if (decoder->input != route->input) {
 298                 decoder->input = route->input;
 299                 /* select mode */
 300                 if (decoder->input == 0) {
 301                         bt819_setbit(decoder, 0x0b, 6, 0);
 302                         bt819_setbit(decoder, 0x1a, 1, 1);
 303                 } else {
 304                         bt819_setbit(decoder, 0x0b, 6, 1);
 305                         bt819_setbit(decoder, 0x1a, 1, 0);
 306                 }
 307         }
 308         return 0;
 309 }
 310
 311 static int bt819_s_stream(struct v4l2_subdev *sd, int enable)
 312 {
 313         struct bt819 *decoder = to_bt819(sd);
 314
 315         v4l2_dbg(1, debug, sd, "enable output %x\n", enable);
 316
 317         if (decoder->enable != enable) {
 318                 decoder->enable = enable;
 319                 bt819_setbit(decoder, 0x16, 7, !enable);
 320         }
 321         return 0;
 322 }
 323
 324 static int bt819_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
 325 {
 326         switch (qc->id) {
 327         case V4L2_CID_BRIGHTNESS:
 328                 v4l2_ctrl_query_fill(qc, -128, 127, 1, 0);
 329                 break;
 330
 331         case V4L2_CID_CONTRAST:
 332                 v4l2_ctrl_query_fill(qc, 0, 511, 1, 256);
 333                 break;
 334
 335         case V4L2_CID_SATURATION:
 336                 v4l2_ctrl_query_fill(qc, 0, 511, 1, 256);
 337                 break;
 338
 339         case V4L2_CID_HUE:
 340                 v4l2_ctrl_query_fill(qc, -128, 127, 1, 0);
 341                 break;
 342
 343         default:
 344                 return -EINVAL;
 345         }
 346         return 0;
 347 }
 348
 349 static int bt819_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 350 {
 351         struct bt819 *decoder = to_bt819(sd);
 352         int temp;
 353
 354         switch (ctrl->id) {
 355         case V4L2_CID_BRIGHTNESS:
 356                 if (decoder->bright == ctrl->value)
 357                         break;
 358                 decoder->bright = ctrl->value;
 359                 bt819_write(decoder, 0x0a, decoder->bright);
 360                 break;
 361
 362         case V4L2_CID_CONTRAST:
 363                 if (decoder->contrast == ctrl->value)
 364                         break;
 365                 decoder->contrast = ctrl->value;
 366                 bt819_write(decoder, 0x0c, decoder->contrast & 0xff);
 367                 bt819_setbit(decoder, 0x0b, 2, ((decoder->contrast >> 8) & 0x01));
 368                 break;
 369
 370         case V4L2_CID_SATURATION:
 371                 if (decoder->sat == ctrl->value)
 372                         break;
 373                 decoder->sat = ctrl->value;
 374                 bt819_write(decoder, 0x0d, (decoder->sat >> 7) & 0xff);
 375                 bt819_setbit(decoder, 0x0b, 1, ((decoder->sat >> 15) & 0x01));
 376
 377                 /* Ratio between U gain and V gain must stay the same as
 378                    the ratio between the default U and V gain values. */
 379                 temp = (decoder->sat * 180) / 254;
 380                 bt819_write(decoder, 0x0e, (temp >> 7) & 0xff);
 381                 bt819_setbit(decoder, 0x0b, 0, (temp >> 15) & 0x01);
 382                 break;
 383
 384         case V4L2_CID_HUE:
 385                 if (decoder->hue == ctrl->value)
 386                         break;
 387                 decoder->hue = ctrl->value;
 388                 bt819_write(decoder, 0x0f, decoder->hue);
 389                 break;
 390
 391         default:
 392                 return -EINVAL;
 393         }
 394         return 0;
 395 }
 396
 397 static int bt819_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 398 {
 399         struct bt819 *decoder = to_bt819(sd);
 400
 401         switch (ctrl->id) {
 402         case V4L2_CID_BRIGHTNESS:
 403                 ctrl->value = decoder->bright;
 404                 break;
 405         case V4L2_CID_CONTRAST:
 406                 ctrl->value = decoder->contrast;
 407                 break;
 408         case V4L2_CID_SATURATION:
 409                 ctrl->value = decoder->sat;
 410                 break;
 411         case V4L2_CID_HUE:
 412                 ctrl->value = decoder->hue;
 413                 break;
 414         default:
 415                 return -EINVAL;
 416         }
 417         return 0;
 418 }
 419
 420 static int bt819_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
 421 {
 422         struct bt819 *decoder = to_bt819(sd);
 423         struct i2c_client *client = v4l2_get_subdevdata(sd);
 424
 425         return v4l2_chip_ident_i2c_client(client, chip, decoder->ident, 0);
 426 }
 427
 428 /* ----------------------------------------------------------------------- */
 429
 430 static const struct v4l2_subdev_core_ops bt819_core_ops = {
 431         .g_chip_ident = bt819_g_chip_ident,
 432         .g_ctrl = bt819_g_ctrl,
 433         .s_ctrl = bt819_s_ctrl,
 434         .queryctrl = bt819_queryctrl,
 435 };
 436
 437 static const struct v4l2_subdev_tuner_ops bt819_tuner_ops = {
 438         .s_std = bt819_s_std,
 439 };
 440
 441 static const struct v4l2_subdev_video_ops bt819_video_ops = {
 442         .s_routing = bt819_s_routing,
 443         .s_stream = bt819_s_stream,
 444         .querystd = bt819_querystd,
 445         .g_input_status = bt819_g_input_status,
 446 };
 447
 448 static const struct v4l2_subdev_ops bt819_ops = {
 449         .core = &bt819_core_ops,
 450         .tuner = &bt819_tuner_ops,
 451         .video = &bt819_video_ops,
 452 };
 453
 454 /* ----------------------------------------------------------------------- */
 455
 456 static int bt819_probe(struct i2c_client *client,
 457                         const struct i2c_device_id *id)
 458 {
 459         int i, ver;
 460         struct bt819 *decoder;
 461         struct v4l2_subdev *sd;
 462         const char *name;
 463
 464         /* Check if the adapter supports the needed features */
 465         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 466                 return -ENODEV;
 467
 468         decoder = kzalloc(sizeof(struct bt819), GFP_KERNEL);
 469         if (decoder == NULL)
 470                 return -ENOMEM;
 471         sd = &decoder->sd;
 472         v4l2_i2c_subdev_init(sd, client, &bt819_ops);
 473
 474         ver = bt819_read(decoder, 0x17);
 475         switch (ver & 0xf0) {
 476         case 0x70:
 477                 name = "bt819a";
 478                 decoder->ident = V4L2_IDENT_BT819A;
 479                 break;
 480         case 0x60:
 481                 name = "bt817a";
 482                 decoder->ident = V4L2_IDENT_BT817A;
 483                 break;
 484         case 0x20:
 485                 name = "bt815a";
 486                 decoder->ident = V4L2_IDENT_BT815A;
 487                 break;
 488         default:
 489                 v4l2_dbg(1, debug, sd,
 490                         "unknown chip version 0x%02x\n", ver);
 491                 return -ENODEV;
 492         }
 493
 494         v4l_info(client, "%s found @ 0x%x (%s)\n", name,
 495                         client->addr << 1, client->adapter->name);
 496
 497         decoder->norm = V4L2_STD_NTSC;
 498         decoder->input = 0;
 499         decoder->enable = 1;
 500         decoder->bright = 0;
 501         decoder->contrast = 0xd8;       /* 100% of original signal */
 502         decoder->hue = 0;
 503         decoder->sat = 0xfe;            /* 100% of original signal */
 504
 505         i = bt819_init(sd);
 506         if (i < 0)
 507                 v4l2_dbg(1, debug, sd, "init status %d\n", i);
 508         return 0;
 509 }
 510
 511 static int bt819_remove(struct i2c_client *client)
 512 {
 513         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 514
 515         v4l2_device_unregister_subdev(sd);
 516         kfree(to_bt819(sd));
 517         return 0;
 518 }
 519
 520 /* ----------------------------------------------------------------------- */
 521
 522 static const struct i2c_device_id bt819_id[] = {
 523         { "bt819a", 0 },
 524         { "bt817a", 0 },
 525         { "bt815a", 0 },
 526         { }
 527 };
 528 MODULE_DEVICE_TABLE(i2c, bt819_id);
 529
 530 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
 531         .name = "bt819",
 532         .probe = bt819_probe,
 533         .remove = bt819_remove,
 534         .id_table = bt819_id,
 535 };