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/videodev2.h>
  37 #include <linux/slab.h>
  38 #include <media/v4l2-device.h>
  39 #include <media/v4l2-chip-ident.h>
  40 #include <media/bt819.h>
  41
  42 MODULE_DESCRIPTION("Brooktree-819 video decoder driver");
  43 MODULE_AUTHOR("Mike Bernson & Dave Perks");
  44 MODULE_LICENSE("GPL");
  45
  46 static int debug;
  47 module_param(debug, int, 0);
  48 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  49
  50
  51 /* ----------------------------------------------------------------------- */
  52
  53 struct bt819 {
  54         struct v4l2_subdev sd;
  55         unsigned char reg[32];
  56
  57         v4l2_std_id norm;
  58         int ident;
  59         int input;
  60         int enable;
  61         int bright;
  62         int contrast;
  63         int hue;
  64         int sat;
  65 };
  66
  67 static inline struct bt819 *to_bt819(struct v4l2_subdev *sd)
  68 {
  69         return container_of(sd, struct bt819, sd);
  70 }
  71
  72 struct timing {
  73         int hactive;
  74         int hdelay;
  75         int vactive;
  76         int vdelay;
  77         int hscale;
  78         int vscale;
  79 };
  80
  81 /* for values, see the bt819 datasheet */
  82 static struct timing timing_data[] = {
  83         {864 - 24, 20, 625 - 2, 1, 0x0504, 0x0000},
  84         {858 - 24, 20, 525 - 2, 1, 0x00f8, 0x0000},
  85 };
  86
  87 /* ----------------------------------------------------------------------- */
  88
  89 static inline int bt819_write(struct bt819 *decoder, u8 reg, u8 value)
  90 {
  91         struct i2c_client *client = v4l2_get_subdevdata(&decoder->sd);
  92
  93         decoder->reg[reg] = value;
  94         return i2c_smbus_write_byte_data(client, reg, value);
  95 }
  96
  97 static inline int bt819_setbit(struct bt819 *decoder, u8 reg, u8 bit, u8 value)
  98 {
  99         return bt819_write(decoder, reg,
 100                 (decoder->reg[reg] & ~(1 << bit)) | (value ? (1 << bit) : 0));
 101 }
 102
 103 static int bt819_write_block(struct bt819 *decoder, const u8 *data, unsigned int len)
 104 {
 105         struct i2c_client *client = v4l2_get_subdevdata(&decoder->sd);
 106         int ret = -1;
 107         u8 reg;
 108
 109         /* the bt819 has an autoincrement function, use it if
 110          * the adapter understands raw I2C */
 111         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 112                 /* do raw I2C, not smbus compatible */
 113                 u8 block_data[32];
 114                 int block_len;
 115
 116                 while (len >= 2) {
 117                         block_len = 0;
 118                         block_data[block_len++] = reg = data[0];
 119                         do {
 120                                 block_data[block_len++] =
 121                                     decoder->reg[reg++] = data[1];
 122                                 len -= 2;
 123                                 data += 2;
 124                         } while (len >= 2 && data[0] == reg && block_len < 32);
 125                         ret = i2c_master_send(client, block_data, block_len);
 126                         if (ret < 0)
 127                                 break;
 128                 }
 129         } else {
 130                 /* do some slow I2C emulation kind of thing */
 131                 while (len >= 2) {
 132                         reg = *data++;
 133                         ret = bt819_write(decoder, reg, *data++);
 134                         if (ret < 0)
 135                                 break;
 136                         len -= 2;
 137                 }
 138         }
 139
 140         return ret;
 141 }
 142
 143 static inline int bt819_read(struct bt819 *decoder, u8 reg)
 144 {
 145         struct i2c_client *client = v4l2_get_subdevdata(&decoder->sd);
 146
 147         return i2c_smbus_read_byte_data(client, reg);
 148 }
 149
 150 static int bt819_init(struct v4l2_subdev *sd)
 151 {
 152         static unsigned char init[] = {
 153                 /*0x1f, 0x00,*/     /* Reset */
 154                 0x01, 0x59,     /* 0x01 input format */
 155                 0x02, 0x00,     /* 0x02 temporal decimation */
 156                 0x03, 0x12,     /* 0x03 Cropping msb */
 157                 0x04, 0x16,     /* 0x04 Vertical Delay, lsb */
 158                 0x05, 0xe0,     /* 0x05 Vertical Active lsb */
 159                 0x06, 0x80,     /* 0x06 Horizontal Delay lsb */
 160                 0x07, 0xd0,     /* 0x07 Horizontal Active lsb */
 161                 0x08, 0x00,     /* 0x08 Horizontal Scaling msb */
 162                 0x09, 0xf8,     /* 0x09 Horizontal Scaling lsb */
 163                 0x0a, 0x00,     /* 0x0a Brightness control */
 164                 0x0b, 0x30,     /* 0x0b Miscellaneous control */
 165                 0x0c, 0xd8,     /* 0x0c Luma Gain lsb */
 166                 0x0d, 0xfe,     /* 0x0d Chroma Gain (U) lsb */
 167                 0x0e, 0xb4,     /* 0x0e Chroma Gain (V) msb */
 168                 0x0f, 0x00,     /* 0x0f Hue control */
 169                 0x12, 0x04,     /* 0x12 Output Format */
 170                 0x13, 0x20,     /* 0x13 Vertial Scaling msb 0x00
 171                                            chroma comb OFF, line drop scaling, interlace scaling
 172                                            BUG? Why does turning the chroma comb on fuck up color?
 173                                            Bug in the bt819 stepping on my board?
 174                                         */
 175                 0x14, 0x00,     /* 0x14 Vertial Scaling lsb */
 176                 0x16, 0x07,     /* 0x16 Video Timing Polarity
 177                                            ACTIVE=active low
 178                                            FIELD: high=odd,
 179                                            vreset=active high,
 180                                            hreset=active high */
 181                 0x18, 0x68,     /* 0x18 AGC Delay */
 182                 0x19, 0x5d,     /* 0x19 Burst Gate Delay */
 183                 0x1a, 0x80,     /* 0x1a ADC Interface */
 184         };
 185
 186         struct bt819 *decoder = to_bt819(sd);
 187         struct timing *timing = &timing_data[(decoder->norm & V4L2_STD_525_60) ? 1 : 0];
 188
 189         init[0x03 * 2 - 1] =
 190             (((timing->vdelay >> 8) & 0x03) << 6) |
 191             (((timing->vactive >> 8) & 0x03) << 4) |
 192             (((timing->hdelay >> 8) & 0x03) << 2) |
 193             ((timing->hactive >> 8) & 0x03);
 194         init[0x04 * 2 - 1] = timing->vdelay & 0xff;
 195         init[0x05 * 2 - 1] = timing->vactive & 0xff;
 196         init[0x06 * 2 - 1] = timing->hdelay & 0xff;
 197         init[0x07 * 2 - 1] = timing->hactive & 0xff;
 198         init[0x08 * 2 - 1] = timing->hscale >> 8;
 199         init[0x09 * 2 - 1] = timing->hscale & 0xff;
 200         /* 0x15 in array is address 0x19 */
 201         init[0x15 * 2 - 1] = (decoder->norm & V4L2_STD_625_50) ? 115 : 93;      /* Chroma burst delay */
 202         /* reset */
 203         bt819_write(decoder, 0x1f, 0x00);
 204         mdelay(1);
 205
 206         /* init */
 207         return bt819_write_block(decoder, init, sizeof(init));
 208 }
 209
 210 /* ----------------------------------------------------------------------- */
 211
 212 static int bt819_status(struct v4l2_subdev *sd, u32 *pstatus, v4l2_std_id *pstd)
 213 {
 214         struct bt819 *decoder = to_bt819(sd);
 215         int status = bt819_read(decoder, 0x00);
 216         int res = V4L2_IN_ST_NO_SIGNAL;
 217         v4l2_std_id std;
 218
 219         if ((status & 0x80))
 220                 res = 0;
 221
 222         if ((status & 0x10))
 223                 std = V4L2_STD_PAL;
 224         else
 225                 std = V4L2_STD_NTSC;
 226         if (pstd)
 227                 *pstd = std;
 228         if (pstatus)
 229                 *pstatus = status;
 230
 231         v4l2_dbg(1, debug, sd, "get status %x\n", status);
 232         return 0;
 233 }
 234
 235 static int bt819_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
 236 {
 237         return bt819_status(sd, NULL, std);
 238 }
 239
 240 static int bt819_g_input_status(struct v4l2_subdev *sd, u32 *status)
 241 {
 242         return bt819_status(sd, status, NULL);
 243 }
 244
 245 static int bt819_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
 246 {
 247         struct bt819 *decoder = to_bt819(sd);
 248         struct timing *timing = NULL;
 249
 250         v4l2_dbg(1, debug, sd, "set norm %llx\n", (unsigned long long)std);
 251
 252         if (sd->v4l2_dev == NULL || sd->v4l2_dev->notify == NULL)
 253                 v4l2_err(sd, "no notify found!\n");
 254
 255         if (std & V4L2_STD_NTSC) {
 256                 v4l2_subdev_notify(sd, BT819_FIFO_RESET_LOW, NULL);
 257                 bt819_setbit(decoder, 0x01, 0, 1);
 258                 bt819_setbit(decoder, 0x01, 1, 0);
 259                 bt819_setbit(decoder, 0x01, 5, 0);
 260                 bt819_write(decoder, 0x18, 0x68);
 261                 bt819_write(decoder, 0x19, 0x5d);
 262                 /* bt819_setbit(decoder, 0x1a,  5, 1); */
 263                 timing = &timing_data[1];
 264         } else if (std & V4L2_STD_PAL) {
 265                 v4l2_subdev_notify(sd, BT819_FIFO_RESET_LOW, NULL);
 266                 bt819_setbit(decoder, 0x01, 0, 1);
 267                 bt819_setbit(decoder, 0x01, 1, 1);
 268                 bt819_setbit(decoder, 0x01, 5, 1);
 269                 bt819_write(decoder, 0x18, 0x7f);
 270                 bt819_write(decoder, 0x19, 0x72);
 271                 /* bt819_setbit(decoder, 0x1a,  5, 0); */
 272                 timing = &timing_data[0];
 273         } else {
 274                 v4l2_dbg(1, debug, sd, "unsupported norm %llx\n",
 275                                 (unsigned long long)std);
 276                 return -EINVAL;
 277         }
 278         bt819_write(decoder, 0x03,
 279                         (((timing->vdelay >> 8) & 0x03) << 6) |
 280                         (((timing->vactive >> 8) & 0x03) << 4) |
 281                         (((timing->hdelay >> 8) & 0x03) << 2) |
 282                         ((timing->hactive >> 8) & 0x03));
 283         bt819_write(decoder, 0x04, timing->vdelay & 0xff);
 284         bt819_write(decoder, 0x05, timing->vactive & 0xff);
 285         bt819_write(decoder, 0x06, timing->hdelay & 0xff);
 286         bt819_write(decoder, 0x07, timing->hactive & 0xff);
 287         bt819_write(decoder, 0x08, (timing->hscale >> 8) & 0xff);
 288         bt819_write(decoder, 0x09, timing->hscale & 0xff);
 289         decoder->norm = std;
 290         v4l2_subdev_notify(sd, BT819_FIFO_RESET_HIGH, NULL);
 291         return 0;
 292 }
 293
 294 static int bt819_s_routing(struct v4l2_subdev *sd,
 295                            u32 input, u32 output, u32 config)
 296 {
 297         struct bt819 *decoder = to_bt819(sd);
 298
 299         v4l2_dbg(1, debug, sd, "set input %x\n", input);
 300
 301         if (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 != input) {
 308                 v4l2_subdev_notify(sd, BT819_FIFO_RESET_LOW, NULL);
 309                 decoder->input = 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, NULL);
 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         .s_std = bt819_s_std,
 448 };
 449
 450 static const struct v4l2_subdev_video_ops bt819_video_ops = {
 451         .s_routing = bt819_s_routing,
 452         .s_stream = bt819_s_stream,
 453         .querystd = bt819_querystd,
 454         .g_input_status = bt819_g_input_status,
 455 };
 456
 457 static const struct v4l2_subdev_ops bt819_ops = {
 458         .core = &bt819_core_ops,
 459         .video = &bt819_video_ops,
 460 };
 461
 462 /* ----------------------------------------------------------------------- */
 463
 464 static int bt819_probe(struct i2c_client *client,
 465                         const struct i2c_device_id *id)
 466 {
 467         int i, ver;
 468         struct bt819 *decoder;
 469         struct v4l2_subdev *sd;
 470         const char *name;
 471
 472         /* Check if the adapter supports the needed features */
 473         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 474                 return -ENODEV;
 475
 476         decoder = kzalloc(sizeof(struct bt819), GFP_KERNEL);
 477         if (decoder == NULL)
 478                 return -ENOMEM;
 479         sd = &decoder->sd;
 480         v4l2_i2c_subdev_init(sd, client, &bt819_ops);
 481
 482         ver = bt819_read(decoder, 0x17);
 483         switch (ver & 0xf0) {
 484         case 0x70:
 485                 name = "bt819a";
 486                 decoder->ident = V4L2_IDENT_BT819A;
 487                 break;
 488         case 0x60:
 489                 name = "bt817a";
 490                 decoder->ident = V4L2_IDENT_BT817A;
 491                 break;
 492         case 0x20:
 493                 name = "bt815a";
 494                 decoder->ident = V4L2_IDENT_BT815A;
 495                 break;
 496         default:
 497                 v4l2_dbg(1, debug, sd,
 498                         "unknown chip version 0x%02x\n", ver);
 499                 return -ENODEV;
 500         }
 501
 502         v4l_info(client, "%s found @ 0x%x (%s)\n", name,
 503                         client->addr << 1, client->adapter->name);
 504
 505         decoder->norm = V4L2_STD_NTSC;
 506         decoder->input = 0;
 507         decoder->enable = 1;
 508         decoder->bright = 0;
 509         decoder->contrast = 0xd8;       /* 100% of original signal */
 510         decoder->hue = 0;
 511         decoder->sat = 0xfe;            /* 100% of original signal */
 512
 513         i = bt819_init(sd);
 514         if (i < 0)
 515                 v4l2_dbg(1, debug, sd, "init status %d\n", i);
 516         return 0;
 517 }
 518
 519 static int bt819_remove(struct i2c_client *client)
 520 {
 521         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 522
 523         v4l2_device_unregister_subdev(sd);
 524         kfree(to_bt819(sd));
 525         return 0;
 526 }
 527
 528 /* ----------------------------------------------------------------------- */
 529
 530 static const struct i2c_device_id bt819_id[] = {
 531         { "bt819a", 0 },
 532         { "bt817a", 0 },
 533         { "bt815a", 0 },
 534         { }
 535 };
 536 MODULE_DEVICE_TABLE(i2c, bt819_id);
 537
 538 static struct i2c_driver bt819_driver = {
 539         .driver = {
 540                 .owner  = THIS_MODULE,
 541                 .name   = "bt819",
 542         },
 543         .probe          = bt819_probe,
 544         .remove         = bt819_remove,
 545         .id_table       = bt819_id,
 546 };
 547
 548 static __init int init_bt819(void)
 549 {
 550         return i2c_add_driver(&bt819_driver);
 551 }
 552
 553 static __exit void exit_bt819(void)
 554 {
 555         i2c_del_driver(&bt819_driver);
 556 }
 557
 558 module_init(init_bt819);
 559 module_exit(exit_bt819);