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/init.h>
  33 #include <linux/delay.h>
  34 #include <linux/errno.h>
  35 #include <linux/fs.h>
  36 #include <linux/kernel.h>
  37 #include <linux/major.h>
  38 #include <linux/slab.h>
  39 #include <linux/mm.h>
  40 #include <linux/pci.h>
  41 #include <linux/signal.h>
  42 #include <asm/io.h>
  43 #include <asm/pgtable.h>
  44 #include <asm/page.h>
  45 #include <linux/sched.h>
  46 #include <linux/types.h>
  47
  48 #include <linux/videodev.h>
  49 #include <asm/uaccess.h>
  50
  51 MODULE_DESCRIPTION("Brooktree-819 video decoder driver");
  52 MODULE_AUTHOR("Mike Bernson & Dave Perks");
  53 MODULE_LICENSE("GPL");
  54
  55 #include <linux/i2c.h>
  56 #include <linux/i2c-dev.h>
  57
  58 #define I2C_NAME(s) (s)->name
  59
  60 #include <linux/video_decoder.h>
  61
  62 static int debug = 0;
  63 module_param(debug, int, 0);
  64 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  65
  66 #define dprintk(num, format, args...) \
  67         do { \
  68                 if (debug >= num) \
  69                         printk(format, ##args); \
  70         } while (0)
  71
  72 /* ----------------------------------------------------------------------- */
  73
  74 struct bt819 {
  75         unsigned char reg[32];
  76
  77         int initialized;
  78         int norm;
  79         int input;
  80         int enable;
  81         int bright;
  82         int contrast;
  83         int hue;
  84         int sat;
  85 };
  86
  87 struct timing {
  88         int hactive;
  89         int hdelay;
  90         int vactive;
  91         int vdelay;
  92         int hscale;
  93         int vscale;
  94 };
  95
  96 /* for values, see the bt819 datasheet */
  97 static struct timing timing_data[] = {
  98         {864 - 24, 20, 625 - 2, 1, 0x0504, 0x0000},
  99         {858 - 24, 20, 525 - 2, 1, 0x00f8, 0x0000},
 100 };
 101
 102 #define   I2C_BT819        0x8a
 103
 104 /* ----------------------------------------------------------------------- */
 105
 106 static inline int
 107 bt819_write (struct i2c_client *client,
 108              u8                 reg,
 109              u8                 value)
 110 {
 111         struct bt819 *decoder = i2c_get_clientdata(client);
 112
 113         decoder->reg[reg] = value;
 114         return i2c_smbus_write_byte_data(client, reg, value);
 115 }
 116
 117 static inline int
 118 bt819_setbit (struct i2c_client *client,
 119               u8                 reg,
 120               u8                 bit,
 121               u8                 value)
 122 {
 123         struct bt819 *decoder = i2c_get_clientdata(client);
 124
 125         return bt819_write(client, reg,
 126                            (decoder->
 127                             reg[reg] & ~(1 << bit)) |
 128                             (value ? (1 << bit) : 0));
 129 }
 130
 131 static int
 132 bt819_write_block (struct i2c_client *client,
 133                    const u8          *data,
 134                    unsigned int       len)
 135 {
 136         int ret = -1;
 137         u8 reg;
 138
 139         /* the bt819 has an autoincrement function, use it if
 140          * the adapter understands raw I2C */
 141         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 142                 /* do raw I2C, not smbus compatible */
 143                 struct bt819 *decoder = i2c_get_clientdata(client);
 144                 struct i2c_msg msg;
 145                 u8 block_data[32];
 146
 147                 msg.addr = client->addr;
 148                 msg.flags = 0;
 149                 while (len >= 2) {
 150                         msg.buf = (char *) block_data;
 151                         msg.len = 0;
 152                         block_data[msg.len++] = reg = data[0];
 153                         do {
 154                                 block_data[msg.len++] =
 155                                     decoder->reg[reg++] = data[1];
 156                                 len -= 2;
 157                                 data += 2;
 158                         } while (len >= 2 && data[0] == reg &&
 159                                  msg.len < 32);
 160                         if ((ret = i2c_transfer(client->adapter,
 161                                                 &msg, 1)) < 0)
 162                                 break;
 163                 }
 164         } else {
 165                 /* do some slow I2C emulation kind of thing */
 166                 while (len >= 2) {
 167                         reg = *data++;
 168                         if ((ret = bt819_write(client, reg, *data++)) < 0)
 169                                 break;
 170                         len -= 2;
 171                 }
 172         }
 173
 174         return ret;
 175 }
 176
 177 static inline int
 178 bt819_read (struct i2c_client *client,
 179             u8                 reg)
 180 {
 181         return i2c_smbus_read_byte_data(client, reg);
 182 }
 183
 184 static int
 185 bt819_init (struct i2c_client *client)
 186 {
 187         struct bt819 *decoder = i2c_get_clientdata(client);
 188
 189         static unsigned char init[] = {
 190                 //0x1f, 0x00,     /* Reset */
 191                 0x01, 0x59,     /* 0x01 input format */
 192                 0x02, 0x00,     /* 0x02 temporal decimation */
 193                 0x03, 0x12,     /* 0x03 Cropping msb */
 194                 0x04, 0x16,     /* 0x04 Vertical Delay, lsb */
 195                 0x05, 0xe0,     /* 0x05 Vertical Active lsb */
 196                 0x06, 0x80,     /* 0x06 Horizontal Delay lsb */
 197                 0x07, 0xd0,     /* 0x07 Horizontal Active lsb */
 198                 0x08, 0x00,     /* 0x08 Horizontal Scaling msb */
 199                 0x09, 0xf8,     /* 0x09 Horizontal Scaling lsb */
 200                 0x0a, 0x00,     /* 0x0a Brightness control */
 201                 0x0b, 0x30,     /* 0x0b Miscellaneous control */
 202                 0x0c, 0xd8,     /* 0x0c Luma Gain lsb */
 203                 0x0d, 0xfe,     /* 0x0d Chroma Gain (U) lsb */
 204                 0x0e, 0xb4,     /* 0x0e Chroma Gain (V) msb */
 205                 0x0f, 0x00,     /* 0x0f Hue control */
 206                 0x12, 0x04,     /* 0x12 Output Format */
 207                 0x13, 0x20,     /* 0x13 Vertial Scaling msb 0x00
 208                                            chroma comb OFF, line drop scaling, interlace scaling
 209                                            BUG? Why does turning the chroma comb on fuck up color?
 210                                            Bug in the bt819 stepping on my board?
 211                                         */
 212                 0x14, 0x00,     /* 0x14 Vertial Scaling lsb */
 213                 0x16, 0x07,     /* 0x16 Video Timing Polarity
 214                                            ACTIVE=active low
 215                                            FIELD: high=odd,
 216                                            vreset=active high,
 217                                            hreset=active high */
 218                 0x18, 0x68,     /* 0x18 AGC Delay */
 219                 0x19, 0x5d,     /* 0x19 Burst Gate Delay */
 220                 0x1a, 0x80,     /* 0x1a ADC Interface */
 221         };
 222
 223         struct timing *timing = &timing_data[decoder->norm];
 224
 225         init[0x03 * 2 - 1] =
 226             (((timing->vdelay >> 8) & 0x03) << 6) | (((timing->
 227                                                        vactive >> 8) &
 228                                                       0x03) << 4) |
 229             (((timing->hdelay >> 8) & 0x03) << 2) | ((timing->
 230                                                       hactive >> 8) &
 231                                                      0x03);
 232         init[0x04 * 2 - 1] = timing->vdelay & 0xff;
 233         init[0x05 * 2 - 1] = timing->vactive & 0xff;
 234         init[0x06 * 2 - 1] = timing->hdelay & 0xff;
 235         init[0x07 * 2 - 1] = timing->hactive & 0xff;
 236         init[0x08 * 2 - 1] = timing->hscale >> 8;
 237         init[0x09 * 2 - 1] = timing->hscale & 0xff;
 238         /* 0x15 in array is address 0x19 */
 239         init[0x15 * 2 - 1] = (decoder->norm == 0) ? 115 : 93;   /* Chroma burst delay */
 240         /* reset */
 241         bt819_write(client, 0x1f, 0x00);
 242         mdelay(1);
 243
 244         /* init */
 245         return bt819_write_block(client, init, sizeof(init));
 246
 247 }
 248
 249 /* ----------------------------------------------------------------------- */
 250
 251 static int
 252 bt819_command (struct i2c_client *client,
 253                unsigned int       cmd,
 254                void              *arg)
 255 {
 256         int temp;
 257
 258         struct bt819 *decoder = i2c_get_clientdata(client);
 259
 260         if (!decoder->initialized) {    // First call to bt819_init could be
 261                 bt819_init(client);     // without #FRST = 0
 262                 decoder->initialized = 1;
 263         }
 264
 265         switch (cmd) {
 266
 267         case 0:
 268                 /* This is just for testing!!! */
 269                 bt819_init(client);
 270                 break;
 271
 272         case DECODER_GET_CAPABILITIES:
 273         {
 274                 struct video_decoder_capability *cap = arg;
 275
 276                 cap->flags = VIDEO_DECODER_PAL |
 277                              VIDEO_DECODER_NTSC |
 278                              VIDEO_DECODER_AUTO |
 279                              VIDEO_DECODER_CCIR;
 280                 cap->inputs = 8;
 281                 cap->outputs = 1;
 282         }
 283                 break;
 284
 285         case DECODER_GET_STATUS:
 286         {
 287                 int *iarg = arg;
 288                 int status;
 289                 int res;
 290
 291                 status = bt819_read(client, 0x00);
 292                 res = 0;
 293                 if ((status & 0x80)) {
 294                         res |= DECODER_STATUS_GOOD;
 295                 }
 296                 switch (decoder->norm) {
 297                 case VIDEO_MODE_NTSC:
 298                         res |= DECODER_STATUS_NTSC;
 299                         break;
 300                 case VIDEO_MODE_PAL:
 301                         res |= DECODER_STATUS_PAL;
 302                         break;
 303                 default:
 304                 case VIDEO_MODE_AUTO:
 305                         if ((status & 0x10)) {
 306                                 res |= DECODER_STATUS_PAL;
 307                         } else {
 308                                 res |= DECODER_STATUS_NTSC;
 309                         }
 310                         break;
 311                 }
 312                 res |= DECODER_STATUS_COLOR;
 313                 *iarg = res;
 314
 315                 dprintk(1, KERN_INFO "%s: get status %x\n", I2C_NAME(client),
 316                         *iarg);
 317         }
 318                 break;
 319
 320         case DECODER_SET_NORM:
 321         {
 322                 int *iarg = arg;
 323                 struct timing *timing = NULL;
 324
 325                 dprintk(1, KERN_INFO "%s: set norm %x\n", I2C_NAME(client),
 326                         *iarg);
 327
 328                 switch (*iarg) {
 329                 case VIDEO_MODE_NTSC:
 330                         bt819_setbit(client, 0x01, 0, 1);
 331                         bt819_setbit(client, 0x01, 1, 0);
 332                         bt819_setbit(client, 0x01, 5, 0);
 333                         bt819_write(client, 0x18, 0x68);
 334                         bt819_write(client, 0x19, 0x5d);
 335                         //bt819_setbit(client, 0x1a,  5, 1);
 336                         timing = &timing_data[VIDEO_MODE_NTSC];
 337                         break;
 338                 case VIDEO_MODE_PAL:
 339                         bt819_setbit(client, 0x01, 0, 1);
 340                         bt819_setbit(client, 0x01, 1, 1);
 341                         bt819_setbit(client, 0x01, 5, 1);
 342                         bt819_write(client, 0x18, 0x7f);
 343                         bt819_write(client, 0x19, 0x72);
 344                         //bt819_setbit(client, 0x1a,  5, 0);
 345                         timing = &timing_data[VIDEO_MODE_PAL];
 346                         break;
 347                 case VIDEO_MODE_AUTO:
 348                         bt819_setbit(client, 0x01, 0, 0);
 349                         bt819_setbit(client, 0x01, 1, 0);
 350                         break;
 351                 default:
 352                         dprintk(1,
 353                                 KERN_ERR
 354                                 "%s: unsupported norm %d\n",
 355                                 I2C_NAME(client), *iarg);
 356                         return -EINVAL;
 357                 }
 358
 359                 if (timing) {
 360                         bt819_write(client, 0x03,
 361                                     (((timing->vdelay >> 8) & 0x03) << 6) |
 362                                     (((timing->vactive >> 8) & 0x03) << 4) |
 363                                     (((timing->hdelay >> 8) & 0x03) << 2) |
 364                                      ((timing->hactive >> 8) & 0x03) );
 365                         bt819_write(client, 0x04, timing->vdelay & 0xff);
 366                         bt819_write(client, 0x05, timing->vactive & 0xff);
 367                         bt819_write(client, 0x06, timing->hdelay & 0xff);
 368                         bt819_write(client, 0x07, timing->hactive & 0xff);
 369                         bt819_write(client, 0x08, (timing->hscale >> 8) & 0xff);
 370                         bt819_write(client, 0x09, timing->hscale & 0xff);
 371                 }
 372
 373                 decoder->norm = *iarg;
 374         }
 375                 break;
 376
 377         case DECODER_SET_INPUT:
 378         {
 379                 int *iarg = arg;
 380
 381                 dprintk(1, KERN_INFO "%s: set input %x\n", I2C_NAME(client),
 382                         *iarg);
 383
 384                 if (*iarg < 0 || *iarg > 7) {
 385                         return -EINVAL;
 386                 }
 387
 388                 if (decoder->input != *iarg) {
 389                         decoder->input = *iarg;
 390                         /* select mode */
 391                         if (decoder->input == 0) {
 392                                 bt819_setbit(client, 0x0b, 6, 0);
 393                                 bt819_setbit(client, 0x1a, 1, 1);
 394                         } else {
 395                                 bt819_setbit(client, 0x0b, 6, 1);
 396                                 bt819_setbit(client, 0x1a, 1, 0);
 397                         }
 398                 }
 399         }
 400                 break;
 401
 402         case DECODER_SET_OUTPUT:
 403         {
 404                 int *iarg = arg;
 405
 406                 dprintk(1, KERN_INFO "%s: set output %x\n", I2C_NAME(client),
 407                         *iarg);
 408
 409                 /* not much choice of outputs */
 410                 if (*iarg != 0) {
 411                         return -EINVAL;
 412                 }
 413         }
 414                 break;
 415
 416         case DECODER_ENABLE_OUTPUT:
 417         {
 418                 int *iarg = arg;
 419                 int enable = (*iarg != 0);
 420
 421                 dprintk(1, KERN_INFO "%s: enable output %x\n",
 422                         I2C_NAME(client), *iarg);
 423
 424                 if (decoder->enable != enable) {
 425                         decoder->enable = enable;
 426
 427                         if (decoder->enable) {
 428                                 bt819_setbit(client, 0x16, 7, 0);
 429                         } else {
 430                                 bt819_setbit(client, 0x16, 7, 1);
 431                         }
 432                 }
 433         }
 434                 break;
 435
 436         case DECODER_SET_PICTURE:
 437         {
 438                 struct video_picture *pic = arg;
 439
 440                 dprintk(1,
 441                         KERN_INFO
 442                         "%s: set picture brightness %d contrast %d colour %d\n",
 443                         I2C_NAME(client), pic->brightness, pic->contrast,
 444                         pic->colour);
 445
 446
 447                 if (decoder->bright != pic->brightness) {
 448                         /* We want -128 to 127 we get 0-65535 */
 449                         decoder->bright = pic->brightness;
 450                         bt819_write(client, 0x0a,
 451                                     (decoder->bright >> 8) - 128);
 452                 }
 453
 454                 if (decoder->contrast != pic->contrast) {
 455                         /* We want 0 to 511 we get 0-65535 */
 456                         decoder->contrast = pic->contrast;
 457                         bt819_write(client, 0x0c,
 458                                     (decoder->contrast >> 7) & 0xff);
 459                         bt819_setbit(client, 0x0b, 2,
 460                                      ((decoder->contrast >> 15) & 0x01));
 461                 }
 462
 463                 if (decoder->sat != pic->colour) {
 464                         /* We want 0 to 511 we get 0-65535 */
 465                         decoder->sat = pic->colour;
 466                         bt819_write(client, 0x0d,
 467                                     (decoder->sat >> 7) & 0xff);
 468                         bt819_setbit(client, 0x0b, 1,
 469                                      ((decoder->sat >> 15) & 0x01));
 470
 471                         temp = (decoder->sat * 201) / 237;
 472                         bt819_write(client, 0x0e, (temp >> 7) & 0xff);
 473                         bt819_setbit(client, 0x0b, 0, (temp >> 15) & 0x01);
 474                 }
 475
 476                 if (decoder->hue != pic->hue) {
 477                         /* We want -128 to 127 we get 0-65535 */
 478                         decoder->hue = pic->hue;
 479                         bt819_write(client, 0x0f,
 480                                     128 - (decoder->hue >> 8));
 481                 }
 482         }
 483                 break;
 484
 485         default:
 486                 return -EINVAL;
 487         }
 488
 489         return 0;
 490 }
 491
 492 /* ----------------------------------------------------------------------- */
 493
 494 /*
 495  * Generic i2c probe
 496  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
 497  */
 498 static unsigned short normal_i2c[] = {
 499         I2C_BT819 >> 1,
 500         I2C_CLIENT_END,
 501 };
 502
 503 static unsigned short ignore = I2C_CLIENT_END;
 504
 505 static struct i2c_client_address_data addr_data = {
 506         .normal_i2c             = normal_i2c,
 507         .probe                  = &ignore,
 508         .ignore                 = &ignore,
 509 };
 510
 511 static struct i2c_driver i2c_driver_bt819;
 512
 513 static int
 514 bt819_detect_client (struct i2c_adapter *adapter,
 515                      int                 address,
 516                      int                 kind)
 517 {
 518         int i, id;
 519         struct bt819 *decoder;
 520         struct i2c_client *client;
 521
 522         dprintk(1,
 523                 KERN_INFO
 524                 "saa7111.c: detecting bt819 client on address 0x%x\n",
 525                 address << 1);
 526
 527         /* Check if the adapter supports the needed features */
 528         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 529                 return 0;
 530
 531         client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
 532         if (client == 0)
 533                 return -ENOMEM;
 534         memset(client, 0, sizeof(struct i2c_client));
 535         client->addr = address;
 536         client->adapter = adapter;
 537         client->driver = &i2c_driver_bt819;
 538
 539         decoder = kmalloc(sizeof(struct bt819), GFP_KERNEL);
 540         if (decoder == NULL) {
 541                 kfree(client);
 542                 return -ENOMEM;
 543         }
 544
 545         memset(decoder, 0, sizeof(struct bt819));
 546         decoder->norm = VIDEO_MODE_NTSC;
 547         decoder->input = 0;
 548         decoder->enable = 1;
 549         decoder->bright = 32768;
 550         decoder->contrast = 32768;
 551         decoder->hue = 32768;
 552         decoder->sat = 32768;
 553         decoder->initialized = 0;
 554         i2c_set_clientdata(client, decoder);
 555
 556         id = bt819_read(client, 0x17);
 557         switch (id & 0xf0) {
 558         case 0x70:
 559                 strlcpy(I2C_NAME(client), "bt819a", sizeof(I2C_NAME(client)));
 560                 break;
 561         case 0x60:
 562                 strlcpy(I2C_NAME(client), "bt817a", sizeof(I2C_NAME(client)));
 563                 break;
 564         case 0x20:
 565                 strlcpy(I2C_NAME(client), "bt815a", sizeof(I2C_NAME(client)));
 566                 break;
 567         default:
 568                 dprintk(1,
 569                         KERN_ERR
 570                         "bt819: unknown chip version 0x%x (ver 0x%x)\n",
 571                         id & 0xf0, id & 0x0f);
 572                 kfree(decoder);
 573                 kfree(client);
 574                 return 0;
 575         }
 576
 577         i = i2c_attach_client(client);
 578         if (i) {
 579                 kfree(client);
 580                 kfree(decoder);
 581                 return i;
 582         }
 583
 584         i = bt819_init(client);
 585         if (i < 0) {
 586                 dprintk(1, KERN_ERR "%s_attach: init status %d\n",
 587                         I2C_NAME(client), i);
 588         } else {
 589                 dprintk(1,
 590                         KERN_INFO
 591                         "%s_attach: chip version 0x%x at address 0x%x\n",
 592                         I2C_NAME(client), id & 0x0f,
 593                         client->addr << 1);
 594         }
 595
 596         return 0;
 597 }
 598
 599 static int
 600 bt819_attach_adapter (struct i2c_adapter *adapter)
 601 {
 602         return i2c_probe(adapter, &addr_data, &bt819_detect_client);
 603 }
 604
 605 static int
 606 bt819_detach_client (struct i2c_client *client)
 607 {
 608         struct bt819 *decoder = i2c_get_clientdata(client);
 609         int err;
 610
 611         err = i2c_detach_client(client);
 612         if (err) {
 613                 return err;
 614         }
 615
 616         kfree(decoder);
 617         kfree(client);
 618
 619         return 0;
 620 }
 621
 622 /* ----------------------------------------------------------------------- */
 623
 624 static struct i2c_driver i2c_driver_bt819 = {
 625         .driver = {
 626                 .name = "bt819",
 627         },
 628
 629         .id = I2C_DRIVERID_BT819,
 630
 631         .attach_adapter = bt819_attach_adapter,
 632         .detach_client = bt819_detach_client,
 633         .command = bt819_command,
 634 };
 635
 636 static int __init
 637 bt819_init_module (void)
 638 {
 639         return i2c_add_driver(&i2c_driver_bt819);
 640 }
 641
 642 static void __exit
 643 bt819_exit (void)
 644 {
 645         i2c_del_driver(&i2c_driver_bt819);
 646 }
 647
 648 module_init(bt819_init_module);
 649 module_exit(bt819_exit);