drivers/media/video/saa7111.c

   1 /*
   2  * saa7111 - Philips SAA7111A video decoder driver version 0.0.3
   3  *
   4  * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
   5  *
   6  * Slight changes for video timing and attachment output by
   7  * Wolfgang Scherr <scherr@net4you.net>
   8  *
   9  * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
  10  *    - moved over to linux>=2.4.x i2c protocol (1/1/2003)
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  25  */
  26
  27 #include <linux/module.h>
  28 #include <linux/init.h>
  29 #include <linux/delay.h>
  30 #include <linux/errno.h>
  31 #include <linux/fs.h>
  32 #include <linux/kernel.h>
  33 #include <linux/major.h>
  34 #include <linux/slab.h>
  35 #include <linux/mm.h>
  36 #include <linux/pci.h>
  37 #include <linux/signal.h>
  38 #include <asm/io.h>
  39 #include <asm/pgtable.h>
  40 #include <asm/page.h>
  41 #include <linux/sched.h>
  42 #include <asm/segment.h>
  43 #include <linux/types.h>
  44
  45 #include <linux/videodev.h>
  46 #include <asm/uaccess.h>
  47
  48 MODULE_DESCRIPTION("Philips SAA7111 video decoder driver");
  49 MODULE_AUTHOR("Dave Perks");
  50 MODULE_LICENSE("GPL");
  51
  52 #include <linux/i2c.h>
  53 #include <linux/i2c-dev.h>
  54
  55 #define I2C_NAME(s) (s)->name
  56
  57 #include <linux/video_decoder.h>
  58
  59 static int debug = 0;
  60 MODULE_PARM(debug, "i");
  61 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  62
  63 #define dprintk(num, format, args...) \
  64         do { \
  65                 if (debug >= num) \
  66                         printk(format, ##args); \
  67         } while (0)
  68
  69 /* ----------------------------------------------------------------------- */
  70
  71 struct saa7111 {
  72         unsigned char reg[32];
  73
  74         int norm;
  75         int input;
  76         int enable;
  77         int bright;
  78         int contrast;
  79         int hue;
  80         int sat;
  81 };
  82
  83 #define   I2C_SAA7111        0x48
  84
  85 /* ----------------------------------------------------------------------- */
  86
  87 static inline int
  88 saa7111_write (struct i2c_client *client,
  89                u8                 reg,
  90                u8                 value)
  91 {
  92         struct saa7111 *decoder = i2c_get_clientdata(client);
  93
  94         decoder->reg[reg] = value;
  95         return i2c_smbus_write_byte_data(client, reg, value);
  96 }
  97
  98 static int
  99 saa7111_write_block (struct i2c_client *client,
 100                      const u8          *data,
 101                      unsigned int       len)
 102 {
 103         int ret = -1;
 104         u8 reg;
 105
 106         /* the saa7111 has an autoincrement function, use it if
 107          * the adapter understands raw I2C */
 108         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 109                 /* do raw I2C, not smbus compatible */
 110                 struct saa7111 *decoder = i2c_get_clientdata(client);
 111                 struct i2c_msg msg;
 112                 u8 block_data[32];
 113
 114                 msg.addr = client->addr;
 115                 msg.flags = client->flags;
 116                 while (len >= 2) {
 117                         msg.buf = (char *) block_data;
 118                         msg.len = 0;
 119                         block_data[msg.len++] = reg = data[0];
 120                         do {
 121                                 block_data[msg.len++] =
 122                                     decoder->reg[reg++] = data[1];
 123                                 len -= 2;
 124                                 data += 2;
 125                         } while (len >= 2 && data[0] == reg &&
 126                                  msg.len < 32);
 127                         if ((ret = i2c_transfer(client->adapter,
 128                                                 &msg, 1)) < 0)
 129                                 break;
 130                 }
 131         } else {
 132                 /* do some slow I2C emulation kind of thing */
 133                 while (len >= 2) {
 134                         reg = *data++;
 135                         if ((ret = saa7111_write(client, reg,
 136                                                  *data++)) < 0)
 137                                 break;
 138                         len -= 2;
 139                 }
 140         }
 141
 142         return ret;
 143 }
 144
 145 static inline int
 146 saa7111_read (struct i2c_client *client,
 147               u8                 reg)
 148 {
 149         return i2c_smbus_read_byte_data(client, reg);
 150 }
 151
 152 /* ----------------------------------------------------------------------- */
 153
 154 static const unsigned char init[] = {
 155         0x00, 0x00,             /* 00 - ID byte */
 156         0x01, 0x00,             /* 01 - reserved */
 157
 158         /*front end */
 159         0x02, 0xd0,             /* 02 - FUSE=3, GUDL=2, MODE=0 */
 160         0x03, 0x23,             /* 03 - HLNRS=0, VBSL=1, WPOFF=0,
 161                                  * HOLDG=0, GAFIX=0, GAI1=256, GAI2=256 */
 162         0x04, 0x00,             /* 04 - GAI1=256 */
 163         0x05, 0x00,             /* 05 - GAI2=256 */
 164
 165         /* decoder */
 166         0x06, 0xf3,             /* 06 - HSB at  13(50Hz) /  17(60Hz)
 167                                  * pixels after end of last line */
 168         /*0x07, 0x13,     * 07 - HSS at 113(50Hz) / 117(60Hz) pixels
 169                                  * after end of last line */
 170         0x07, 0xe8,             /* 07 - HSS seems to be needed to
 171                                  * work with NTSC, too */
 172         0x08, 0xc8,             /* 08 - AUFD=1, FSEL=1, EXFIL=0,
 173                                  * VTRC=1, HPLL=0, VNOI=0 */
 174         0x09, 0x01,             /* 09 - BYPS=0, PREF=0, BPSS=0,
 175                                  * VBLB=0, UPTCV=0, APER=1 */
 176         0x0a, 0x80,             /* 0a - BRIG=128 */
 177         0x0b, 0x47,             /* 0b - CONT=1.109 */
 178         0x0c, 0x40,             /* 0c - SATN=1.0 */
 179         0x0d, 0x00,             /* 0d - HUE=0 */
 180         0x0e, 0x01,             /* 0e - CDTO=0, CSTD=0, DCCF=0,
 181                                  * FCTC=0, CHBW=1 */
 182         0x0f, 0x00,             /* 0f - reserved */
 183         0x10, 0x48,             /* 10 - OFTS=1, HDEL=0, VRLN=1, YDEL=0 */
 184         0x11, 0x1c,             /* 11 - GPSW=0, CM99=0, FECO=0, COMPO=1,
 185                                  * OEYC=1, OEHV=1, VIPB=0, COLO=0 */
 186         0x12, 0x00,             /* 12 - output control 2 */
 187         0x13, 0x00,             /* 13 - output control 3 */
 188         0x14, 0x00,             /* 14 - reserved */
 189         0x15, 0x00,             /* 15 - VBI */
 190         0x16, 0x00,             /* 16 - VBI */
 191         0x17, 0x00,             /* 17 - VBI */
 192 };
 193
 194 static int
 195 saa7111_command (struct i2c_client *client,
 196                  unsigned int       cmd,
 197                  void              *arg)
 198 {
 199         struct saa7111 *decoder = i2c_get_clientdata(client);
 200
 201         switch (cmd) {
 202
 203         case 0:
 204                 //saa7111_write_block(client, init, sizeof(init));
 205                 break;
 206
 207         case DECODER_DUMP:
 208         {
 209                 int i;
 210
 211                 for (i = 0; i < 32; i += 16) {
 212                         int j;
 213
 214                         printk(KERN_DEBUG "%s: %03x", I2C_NAME(client), i);
 215                         for (j = 0; j < 16; ++j) {
 216                                 printk(" %02x",
 217                                        saa7111_read(client, i + j));
 218                         }
 219                         printk("\n");
 220                 }
 221         }
 222                 break;
 223
 224         case DECODER_GET_CAPABILITIES:
 225         {
 226                 struct video_decoder_capability *cap = arg;
 227
 228                 cap->flags = VIDEO_DECODER_PAL |
 229                              VIDEO_DECODER_NTSC |
 230                              VIDEO_DECODER_SECAM |
 231                              VIDEO_DECODER_AUTO |
 232                              VIDEO_DECODER_CCIR;
 233                 cap->inputs = 8;
 234                 cap->outputs = 1;
 235         }
 236                 break;
 237
 238         case DECODER_GET_STATUS:
 239         {
 240                 int *iarg = arg;
 241                 int status;
 242                 int res;
 243
 244                 status = saa7111_read(client, 0x1f);
 245                 dprintk(1, KERN_DEBUG "%s status: 0x%02x\n", I2C_NAME(client),
 246                         status);
 247                 res = 0;
 248                 if ((status & (1 << 6)) == 0) {
 249                         res |= DECODER_STATUS_GOOD;
 250                 }
 251                 switch (decoder->norm) {
 252                 case VIDEO_MODE_NTSC:
 253                         res |= DECODER_STATUS_NTSC;
 254                         break;
 255                 case VIDEO_MODE_PAL:
 256                         res |= DECODER_STATUS_PAL;
 257                         break;
 258                 case VIDEO_MODE_SECAM:
 259                         res |= DECODER_STATUS_SECAM;
 260                         break;
 261                 default:
 262                 case VIDEO_MODE_AUTO:
 263                         if ((status & (1 << 5)) != 0) {
 264                                 res |= DECODER_STATUS_NTSC;
 265                         } else {
 266                                 res |= DECODER_STATUS_PAL;
 267                         }
 268                         break;
 269                 }
 270                 if ((status & (1 << 0)) != 0) {
 271                         res |= DECODER_STATUS_COLOR;
 272                 }
 273                 *iarg = res;
 274         }
 275                 break;
 276
 277         case DECODER_SET_NORM:
 278         {
 279                 int *iarg = arg;
 280
 281                 switch (*iarg) {
 282
 283                 case VIDEO_MODE_NTSC:
 284                         saa7111_write(client, 0x08,
 285                                       (decoder->reg[0x08] & 0x3f) | 0x40);
 286                         saa7111_write(client, 0x0e,
 287                                       (decoder->reg[0x0e] & 0x8f));
 288                         break;
 289
 290                 case VIDEO_MODE_PAL:
 291                         saa7111_write(client, 0x08,
 292                                       (decoder->reg[0x08] & 0x3f) | 0x00);
 293                         saa7111_write(client, 0x0e,
 294                                       (decoder->reg[0x0e] & 0x8f));
 295                         break;
 296
 297                 case VIDEO_MODE_SECAM:
 298                         saa7111_write(client, 0x08,
 299                                       (decoder->reg[0x0e] & 0x3f) | 0x00);
 300                         saa7111_write(client, 0x0e,
 301                                       (decoder->reg[0x0e] & 0x8f) | 0x50);
 302                         break;
 303
 304                 case VIDEO_MODE_AUTO:
 305                         saa7111_write(client, 0x08,
 306                                       (decoder->reg[0x08] & 0x3f) | 0x80);
 307                         saa7111_write(client, 0x0e,
 308                                       (decoder->reg[0x0e] & 0x8f));
 309                         break;
 310
 311                 default:
 312                         return -EINVAL;
 313
 314                 }
 315                 decoder->norm = *iarg;
 316         }
 317                 break;
 318
 319         case DECODER_SET_INPUT:
 320         {
 321                 int *iarg = arg;
 322
 323                 if (*iarg < 0 || *iarg > 7) {
 324                         return -EINVAL;
 325                 }
 326
 327                 if (decoder->input != *iarg) {
 328                         decoder->input = *iarg;
 329                         /* select mode */
 330                         saa7111_write(client, 0x02,
 331                                       (decoder->
 332                                        reg[0x02] & 0xf8) | decoder->input);
 333                         /* bypass chrominance trap for modes 4..7 */
 334                         saa7111_write(client, 0x09,
 335                                       (decoder->
 336                                        reg[0x09] & 0x7f) | ((decoder->
 337                                                              input >
 338                                                              3) ? 0x80 :
 339                                                             0));
 340                 }
 341         }
 342                 break;
 343
 344         case DECODER_SET_OUTPUT:
 345         {
 346                 int *iarg = arg;
 347
 348                 /* not much choice of outputs */
 349                 if (*iarg != 0) {
 350                         return -EINVAL;
 351                 }
 352         }
 353                 break;
 354
 355         case DECODER_ENABLE_OUTPUT:
 356         {
 357                 int *iarg = arg;
 358                 int enable = (*iarg != 0);
 359
 360                 if (decoder->enable != enable) {
 361                         decoder->enable = enable;
 362
 363                         /* RJ: If output should be disabled (for
 364                          * playing videos), we also need a open PLL.
 365                          * The input is set to 0 (where no input
 366                          * source is connected), although this
 367                          * is not necessary.
 368                          *
 369                          * If output should be enabled, we have to
 370                          * reverse the above.
 371                          */
 372
 373                         if (decoder->enable) {
 374                                 saa7111_write(client, 0x02,
 375                                               (decoder->
 376                                                reg[0x02] & 0xf8) |
 377                                               decoder->input);
 378                                 saa7111_write(client, 0x08,
 379                                               (decoder->reg[0x08] & 0xfb));
 380                                 saa7111_write(client, 0x11,
 381                                               (decoder->
 382                                                reg[0x11] & 0xf3) | 0x0c);
 383                         } else {
 384                                 saa7111_write(client, 0x02,
 385                                               (decoder->reg[0x02] & 0xf8));
 386                                 saa7111_write(client, 0x08,
 387                                               (decoder->
 388                                                reg[0x08] & 0xfb) | 0x04);
 389                                 saa7111_write(client, 0x11,
 390                                               (decoder->reg[0x11] & 0xf3));
 391                         }
 392                 }
 393         }
 394                 break;
 395
 396         case DECODER_SET_PICTURE:
 397         {
 398                 struct video_picture *pic = arg;
 399
 400                 if (decoder->bright != pic->brightness) {
 401                         /* We want 0 to 255 we get 0-65535 */
 402                         decoder->bright = pic->brightness;
 403                         saa7111_write(client, 0x0a, decoder->bright >> 8);
 404                 }
 405                 if (decoder->contrast != pic->contrast) {
 406                         /* We want 0 to 127 we get 0-65535 */
 407                         decoder->contrast = pic->contrast;
 408                         saa7111_write(client, 0x0b,
 409                                       decoder->contrast >> 9);
 410                 }
 411                 if (decoder->sat != pic->colour) {
 412                         /* We want 0 to 127 we get 0-65535 */
 413                         decoder->sat = pic->colour;
 414                         saa7111_write(client, 0x0c, decoder->sat >> 9);
 415                 }
 416                 if (decoder->hue != pic->hue) {
 417                         /* We want -128 to 127 we get 0-65535 */
 418                         decoder->hue = pic->hue;
 419                         saa7111_write(client, 0x0d,
 420                                       (decoder->hue - 32768) >> 8);
 421                 }
 422         }
 423                 break;
 424
 425         default:
 426                 return -EINVAL;
 427         }
 428
 429         return 0;
 430 }
 431
 432 /* ----------------------------------------------------------------------- */
 433
 434 /*
 435  * Generic i2c probe
 436  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
 437  */
 438 static unsigned short normal_i2c[] = { I2C_SAA7111 >> 1, I2C_CLIENT_END };
 439 static unsigned short normal_i2c_range[] = { I2C_CLIENT_END };
 440
 441 static unsigned short probe[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
 442 static unsigned short probe_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
 443 static unsigned short ignore[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
 444 static unsigned short ignore_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
 445 static unsigned short force[2] = { I2C_CLIENT_END , I2C_CLIENT_END };
 446
 447 static struct i2c_client_address_data addr_data = {
 448         .normal_i2c             = normal_i2c,
 449         .normal_i2c_range       = normal_i2c_range,
 450         .probe                  = probe,
 451         .probe_range            = probe_range,
 452         .ignore                 = ignore,
 453         .ignore_range           = ignore_range,
 454         .force                  = force
 455 };
 456
 457 static int saa7111_i2c_id = 0;
 458 static struct i2c_driver i2c_driver_saa7111;
 459
 460 static int
 461 saa7111_detect_client (struct i2c_adapter *adapter,
 462                        int                 address,
 463                        int                 kind)
 464 {
 465         int i;
 466         struct i2c_client *client;
 467         struct saa7111 *decoder;
 468
 469         dprintk(1,
 470                 KERN_INFO
 471                 "saa7111.c: detecting saa7111 client on address 0x%x\n",
 472                 address << 1);
 473
 474         /* Check if the adapter supports the needed features */
 475         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 476                 return 0;
 477
 478         client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
 479         if (client == 0)
 480                 return -ENOMEM;
 481         memset(client, 0, sizeof(struct i2c_client));
 482         client->addr = address;
 483         client->adapter = adapter;
 484         client->driver = &i2c_driver_saa7111;
 485         client->flags = I2C_CLIENT_ALLOW_USE;
 486         client->id = saa7111_i2c_id++;
 487         snprintf(I2C_NAME(client), sizeof(I2C_NAME(client)) - 1,
 488                 "saa7111[%d]", client->id);
 489
 490         decoder = kmalloc(sizeof(struct saa7111), GFP_KERNEL);
 491         if (decoder == NULL) {
 492                 kfree(client);
 493                 return -ENOMEM;
 494         }
 495         memset(decoder, 0, sizeof(struct saa7111));
 496         decoder->norm = VIDEO_MODE_NTSC;
 497         decoder->input = 0;
 498         decoder->enable = 1;
 499         decoder->bright = 32768;
 500         decoder->contrast = 32768;
 501         decoder->hue = 32768;
 502         decoder->sat = 32768;
 503         i2c_set_clientdata(client, decoder);
 504
 505         i = i2c_attach_client(client);
 506         if (i) {
 507                 kfree(client);
 508                 kfree(decoder);
 509                 return i;
 510         }
 511
 512         i = saa7111_write_block(client, init, sizeof(init));
 513         if (i < 0) {
 514                 dprintk(1, KERN_ERR "%s_attach error: init status %d\n",
 515                         I2C_NAME(client), i);
 516         } else {
 517                 dprintk(1,
 518                         KERN_INFO
 519                         "%s_attach: chip version %x at address 0x%x\n",
 520                         I2C_NAME(client), saa7111_read(client, 0x00) >> 4,
 521                         client->addr << 1);
 522         }
 523
 524         return 0;
 525 }
 526
 527 static int
 528 saa7111_attach_adapter (struct i2c_adapter *adapter)
 529 {
 530         dprintk(1,
 531                 KERN_INFO
 532                 "saa7111.c: starting probe for adapter %s (0x%x)\n",
 533                 I2C_NAME(adapter), adapter->id);
 534         return i2c_probe(adapter, &addr_data, &saa7111_detect_client);
 535 }
 536
 537 static int
 538 saa7111_detach_client (struct i2c_client *client)
 539 {
 540         struct saa7111 *decoder = i2c_get_clientdata(client);
 541         int err;
 542
 543         err = i2c_detach_client(client);
 544         if (err) {
 545                 return err;
 546         }
 547
 548         kfree(decoder);
 549         kfree(client);
 550
 551         return 0;
 552 }
 553
 554 /* ----------------------------------------------------------------------- */
 555
 556 static struct i2c_driver i2c_driver_saa7111 = {
 557         .owner = THIS_MODULE,
 558         .name = "saa7111",
 559
 560         .id = I2C_DRIVERID_SAA7111A,
 561         .flags = I2C_DF_NOTIFY,
 562
 563         .attach_adapter = saa7111_attach_adapter,
 564         .detach_client = saa7111_detach_client,
 565         .command = saa7111_command,
 566 };
 567
 568 static int __init
 569 saa7111_init (void)
 570 {
 571         return i2c_add_driver(&i2c_driver_saa7111);
 572 }
 573
 574 static void __exit
 575 saa7111_exit (void)
 576 {
 577         i2c_del_driver(&i2c_driver_saa7111);
 578 }
 579
 580 module_init(saa7111_init);
 581 module_exit(saa7111_exit);