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", (unsigned long long)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",
 271                                 (unsigned long long)std);
 272                 return -EINVAL;
 273         }
 274         bt819_write(decoder, 0x03,
 275                         (((timing->vdelay >> 8) & 0x03) << 6) |
 276                         (((timing->vactive >> 8) & 0x03) << 4) |
 277                         (((timing->hdelay >> 8) & 0x03) << 2) |
 278                         ((timing->hactive >> 8) & 0x03));
 279         bt819_write(decoder, 0x04, timing->vdelay & 0xff);
 280         bt819_write(decoder, 0x05, timing->vactive & 0xff);
 281         bt819_write(decoder, 0x06, timing->hdelay & 0xff);
 282         bt819_write(decoder, 0x07, timing->hactive & 0xff);
 283         bt819_write(decoder, 0x08, (timing->hscale >> 8) & 0xff);
 284         bt819_write(decoder, 0x09, timing->hscale & 0xff);
 285         decoder->norm = std;
 286         return 0;
 287 }
 288
 289 static int bt819_s_routing(struct v4l2_subdev *sd, const struct v4l2_routing *route)
 290 {
 291         struct bt819 *decoder = to_bt819(sd);
 292
 293         v4l2_dbg(1, debug, sd, "set input %x\n", route->input);
 294
 295         if (route->input < 0 || route->input > 7)
 296                 return -EINVAL;
 297
 298         if (decoder->input != route->input) {
 299                 decoder->input = route->input;
 300                 /* select mode */
 301                 if (decoder->input == 0) {
 302                         bt819_setbit(decoder, 0x0b, 6, 0);
 303                         bt819_setbit(decoder, 0x1a, 1, 1);
 304                 } else {
 305                         bt819_setbit(decoder, 0x0b, 6, 1);
 306                         bt819_setbit(decoder, 0x1a, 1, 0);
 307                 }
 308         }
 309         return 0;
 310 }
 311
 312 static int bt819_s_stream(struct v4l2_subdev *sd, int enable)
 313 {
 314         struct bt819 *decoder = to_bt819(sd);
 315
 316         v4l2_dbg(1, debug, sd, "enable output %x\n", enable);
 317
 318         if (decoder->enable != enable) {
 319                 decoder->enable = enable;
 320                 bt819_setbit(decoder, 0x16, 7, !enable);
 321         }
 322         return 0;
 323 }
 324
 325 static int bt819_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
 326 {
 327         switch (qc->id) {
 328         case V4L2_CID_BRIGHTNESS:
 329                 v4l2_ctrl_query_fill(qc, -128, 127, 1, 0);
 330                 break;
 331
 332         case V4L2_CID_CONTRAST:
 333                 v4l2_ctrl_query_fill(qc, 0, 511, 1, 256);
 334                 break;
 335
 336         case V4L2_CID_SATURATION:
 337                 v4l2_ctrl_query_fill(qc, 0, 511, 1, 256);
 338                 break;
 339
 340         case V4L2_CID_HUE:
 341                 v4l2_ctrl_query_fill(qc, -128, 127, 1, 0);
 342                 break;
 343
 344         default:
 345                 return -EINVAL;
 346         }
 347         return 0;
 348 }
 349
 350 static int bt819_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 351 {
 352         struct bt819 *decoder = to_bt819(sd);
 353         int temp;
 354
 355         switch (ctrl->id) {
 356         case V4L2_CID_BRIGHTNESS:
 357                 if (decoder->bright == ctrl->value)
 358                         break;
 359                 decoder->bright = ctrl->value;
 360                 bt819_write(decoder, 0x0a, decoder->bright);
 361                 break;
 362
 363         case V4L2_CID_CONTRAST:
 364                 if (decoder->contrast == ctrl->value)
 365                         break;
 366                 decoder->contrast = ctrl->value;
 367                 bt819_write(decoder, 0x0c, decoder->contrast & 0xff);
 368                 bt819_setbit(decoder, 0x0b, 2, ((decoder->contrast >> 8) & 0x01));
 369                 break;
 370
 371         case V4L2_CID_SATURATION:
 372                 if (decoder->sat == ctrl->value)
 373                         break;
 374                 decoder->sat = ctrl->value;
 375                 bt819_write(decoder, 0x0d, (decoder->sat >> 7) & 0xff);
 376                 bt819_setbit(decoder, 0x0b, 1, ((decoder->sat >> 15) & 0x01));
 377
 378                 /* Ratio between U gain and V gain must stay the same as
 379                    the ratio between the default U and V gain values. */
 380                 temp = (decoder->sat * 180) / 254;
 381                 bt819_write(decoder, 0x0e, (temp >> 7) & 0xff);
 382                 bt819_setbit(decoder, 0x0b, 0, (temp >> 15) & 0x01);
 383                 break;
 384
 385         case V4L2_CID_HUE:
 386                 if (decoder->hue == ctrl->value)
 387                         break;
 388                 decoder->hue = ctrl->value;
 389                 bt819_write(decoder, 0x0f, decoder->hue);
 390                 break;
 391
 392         default:
 393                 return -EINVAL;
 394         }
 395         return 0;
 396 }
 397
 398 static int bt819_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 399 {
 400         struct bt819 *decoder = to_bt819(sd);
 401
 402         switch (ctrl->id) {
 403         case V4L2_CID_BRIGHTNESS:
 404                 ctrl->value = decoder->bright;
 405                 break;
 406         case V4L2_CID_CONTRAST:
 407                 ctrl->value = decoder->contrast;
 408                 break;
 409         case V4L2_CID_SATURATION:
 410                 ctrl->value = decoder->sat;
 411                 break;
 412         case V4L2_CID_HUE:
 413                 ctrl->value = decoder->hue;
 414                 break;
 415         default:
 416                 return -EINVAL;
 417         }
 418         return 0;
 419 }
 420
 421 static int bt819_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
 422 {
 423         struct bt819 *decoder = to_bt819(sd);
 424         struct i2c_client *client = v4l2_get_subdevdata(sd);
 425
 426         return v4l2_chip_ident_i2c_client(client, chip, decoder->ident, 0);
 427 }
 428
 429 /* ----------------------------------------------------------------------- */
 430
 431 static const struct v4l2_subdev_core_ops bt819_core_ops = {
 432         .g_chip_ident = bt819_g_chip_ident,
 433         .g_ctrl = bt819_g_ctrl,
 434         .s_ctrl = bt819_s_ctrl,
 435         .queryctrl = bt819_queryctrl,
 436 };
 437
 438 static const struct v4l2_subdev_tuner_ops bt819_tuner_ops = {
 439         .s_std = bt819_s_std,
 440 };
 441
 442 static const struct v4l2_subdev_video_ops bt819_video_ops = {
 443         .s_routing = bt819_s_routing,
 444         .s_stream = bt819_s_stream,
 445         .querystd = bt819_querystd,
 446         .g_input_status = bt819_g_input_status,
 447 };
 448
 449 static const struct v4l2_subdev_ops bt819_ops = {
 450         .core = &bt819_core_ops,
 451         .tuner = &bt819_tuner_ops,
 452         .video = &bt819_video_ops,
 453 };
 454
 455 /* ----------------------------------------------------------------------- */
 456
 457 static int bt819_probe(struct i2c_client *client,
 458                         const struct i2c_device_id *id)
 459 {
 460         int i, ver;
 461         struct bt819 *decoder;
 462         struct v4l2_subdev *sd;
 463         const char *name;
 464
 465         /* Check if the adapter supports the needed features */
 466         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 467                 return -ENODEV;
 468
 469         decoder = kzalloc(sizeof(struct bt819), GFP_KERNEL);
 470         if (decoder == NULL)
 471                 return -ENOMEM;
 472         sd = &decoder->sd;
 473         v4l2_i2c_subdev_init(sd, client, &bt819_ops);
 474
 475         ver = bt819_read(decoder, 0x17);
 476         switch (ver & 0xf0) {
 477         case 0x70:
 478                 name = "bt819a";
 479                 decoder->ident = V4L2_IDENT_BT819A;
 480                 break;
 481         case 0x60:
 482                 name = "bt817a";
 483                 decoder->ident = V4L2_IDENT_BT817A;
 484                 break;
 485         case 0x20:
 486                 name = "bt815a";
 487                 decoder->ident = V4L2_IDENT_BT815A;
 488                 break;
 489         default:
 490                 v4l2_dbg(1, debug, sd,
 491                         "unknown chip version 0x%02x\n", ver);
 492                 return -ENODEV;
 493         }
 494
 495         v4l_info(client, "%s found @ 0x%x (%s)\n", name,
 496                         client->addr << 1, client->adapter->name);
 497
 498         decoder->norm = V4L2_STD_NTSC;
 499         decoder->input = 0;
 500         decoder->enable = 1;
 501         decoder->bright = 0;
 502         decoder->contrast = 0xd8;       /* 100% of original signal */
 503         decoder->hue = 0;
 504         decoder->sat = 0xfe;            /* 100% of original signal */
 505
 506         i = bt819_init(sd);
 507         if (i < 0)
 508                 v4l2_dbg(1, debug, sd, "init status %d\n", i);
 509         return 0;
 510 }
 511
 512 static int bt819_remove(struct i2c_client *client)
 513 {
 514         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 515
 516         v4l2_device_unregister_subdev(sd);
 517         kfree(to_bt819(sd));
 518         return 0;
 519 }
 520
 521 /* ----------------------------------------------------------------------- */
 522
 523 static const struct i2c_device_id bt819_id[] = {
 524         { "bt819a", 0 },
 525         { "bt817a", 0 },
 526         { "bt815a", 0 },
 527         { }
 528 };
 529 MODULE_DEVICE_TABLE(i2c, bt819_id);
 530
 531 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
 532         .name = "bt819",
 533         .probe = bt819_probe,
 534         .remove = bt819_remove,
 535         .id_table = bt819_id,
 536 };