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   1 /*
   2  *  adv7175 - adv7175a video encoder driver version 0.0.3
   3  *
   4  * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
   5  * Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net>
   6  * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
   7  *    - some corrections for Pinnacle Systems Inc. DC10plus card.
   8  *
   9  * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
  10  *    - moved over to linux>=2.4.x i2c protocol (9/9/2002)
  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 <linux/types.h>
  43
  44 #include <linux/videodev.h>
  45 #include <asm/uaccess.h>
  46
  47 MODULE_DESCRIPTION("Analog Devices ADV7175 video encoder driver");
  48 MODULE_AUTHOR("Dave Perks");
  49 MODULE_LICENSE("GPL");
  50
  51 #include <linux/i2c.h>
  52
  53 #define I2C_NAME(s) (s)->name
  54
  55 #include <linux/video_encoder.h>
  56
  57 static int debug = 0;
  58 module_param(debug, int, 0);
  59 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  60
  61 #define dprintk(num, format, args...) \
  62         do { \
  63                 if (debug >= num) \
  64                         printk(format, ##args); \
  65         } while (0)
  66
  67 /* ----------------------------------------------------------------------- */
  68
  69 struct adv7175 {
  70         unsigned char reg[128];
  71
  72         int norm;
  73         int input;
  74         int enable;
  75         int bright;
  76         int contrast;
  77         int hue;
  78         int sat;
  79 };
  80
  81 #define   I2C_ADV7175        0xd4
  82 #define   I2C_ADV7176        0x54
  83
  84 static char adv7175_name[] = "adv7175";
  85 static char adv7176_name[] = "adv7176";
  86
  87 static char *inputs[] = { "pass_through", "play_back", "color_bar" };
  88 static char *norms[] = { "PAL", "NTSC", "SECAM->PAL (may not work!)" };
  89
  90 /* ----------------------------------------------------------------------- */
  91
  92 static inline int
  93 adv7175_write (struct i2c_client *client,
  94                u8                 reg,
  95                u8                 value)
  96 {
  97         struct adv7175 *encoder = i2c_get_clientdata(client);
  98
  99         encoder->reg[reg] = value;
 100         return i2c_smbus_write_byte_data(client, reg, value);
 101 }
 102
 103 static inline int
 104 adv7175_read (struct i2c_client *client,
 105               u8                 reg)
 106 {
 107         return i2c_smbus_read_byte_data(client, reg);
 108 }
 109
 110 static int
 111 adv7175_write_block (struct i2c_client *client,
 112                      const u8          *data,
 113                      unsigned int       len)
 114 {
 115         int ret = -1;
 116         u8 reg;
 117
 118         /* the adv7175 has an autoincrement function, use it if
 119          * the adapter understands raw I2C */
 120         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 121                 /* do raw I2C, not smbus compatible */
 122                 struct adv7175 *encoder = i2c_get_clientdata(client);
 123                 struct i2c_msg msg;
 124                 u8 block_data[32];
 125
 126                 msg.addr = client->addr;
 127                 msg.flags = 0;
 128                 while (len >= 2) {
 129                         msg.buf = (char *) block_data;
 130                         msg.len = 0;
 131                         block_data[msg.len++] = reg = data[0];
 132                         do {
 133                                 block_data[msg.len++] =
 134                                     encoder->reg[reg++] = data[1];
 135                                 len -= 2;
 136                                 data += 2;
 137                         } while (len >= 2 && data[0] == reg &&
 138                                  msg.len < 32);
 139                         if ((ret = i2c_transfer(client->adapter,
 140                                                 &msg, 1)) < 0)
 141                                 break;
 142                 }
 143         } else {
 144                 /* do some slow I2C emulation kind of thing */
 145                 while (len >= 2) {
 146                         reg = *data++;
 147                         if ((ret = adv7175_write(client, reg,
 148                                                  *data++)) < 0)
 149                                 break;
 150                         len -= 2;
 151                 }
 152         }
 153
 154         return ret;
 155 }
 156
 157 static void
 158 set_subcarrier_freq (struct i2c_client *client,
 159                      int                pass_through)
 160 {
 161         /* for some reason pass_through NTSC needs
 162          * a different sub-carrier freq to remain stable. */
 163         if(pass_through)
 164                 adv7175_write(client, 0x02, 0x00);
 165         else
 166                 adv7175_write(client, 0x02, 0x55);
 167
 168         adv7175_write(client, 0x03, 0x55);
 169         adv7175_write(client, 0x04, 0x55);
 170         adv7175_write(client, 0x05, 0x25);
 171 }
 172
 173 #ifdef ENCODER_DUMP
 174 static void
 175 dump (struct i2c_client *client)
 176 {
 177         struct adv7175 *encoder = i2c_get_clientdata(client);
 178         int i, j;
 179
 180         printk(KERN_INFO "%s: registry dump\n", I2C_NAME(client));
 181         for (i = 0; i < 182 / 8; i++) {
 182                 printk("%s: 0x%02x -", I2C_NAME(client), i * 8);
 183                 for (j = 0; j < 8; j++) {
 184                         printk(" 0x%02x", encoder->reg[i * 8 + j]);
 185                 }
 186                 printk("\n");
 187         }
 188 }
 189 #endif
 190
 191 /* ----------------------------------------------------------------------- */
 192 // Output filter:  S-Video  Composite
 193
 194 #define MR050       0x11        //0x09
 195 #define MR060       0x14        //0x0c
 196
 197 //---------------------------------------------------------------------------
 198
 199 #define TR0MODE     0x46
 200 #define TR0RST      0x80
 201
 202 #define TR1CAPT     0x80
 203 #define TR1PLAY     0x00
 204
 205 static const unsigned char init_common[] = {
 206
 207         0x00, MR050,            /* MR0, PAL enabled */
 208         0x01, 0x00,             /* MR1 */
 209         0x02, 0x0c,             /* subc. freq. */
 210         0x03, 0x8c,             /* subc. freq. */
 211         0x04, 0x79,             /* subc. freq. */
 212         0x05, 0x26,             /* subc. freq. */
 213         0x06, 0x40,             /* subc. phase */
 214
 215         0x07, TR0MODE,          /* TR0, 16bit */
 216         0x08, 0x21,             /*  */
 217         0x09, 0x00,             /*  */
 218         0x0a, 0x00,             /*  */
 219         0x0b, 0x00,             /*  */
 220         0x0c, TR1CAPT,          /* TR1 */
 221         0x0d, 0x4f,             /* MR2 */
 222         0x0e, 0x00,             /*  */
 223         0x0f, 0x00,             /*  */
 224         0x10, 0x00,             /*  */
 225         0x11, 0x00,             /*  */
 226 };
 227
 228 static const unsigned char init_pal[] = {
 229         0x00, MR050,            /* MR0, PAL enabled */
 230         0x01, 0x00,             /* MR1 */
 231         0x02, 0x0c,             /* subc. freq. */
 232         0x03, 0x8c,             /* subc. freq. */
 233         0x04, 0x79,             /* subc. freq. */
 234         0x05, 0x26,             /* subc. freq. */
 235         0x06, 0x40,             /* subc. phase */
 236 };
 237
 238 static const unsigned char init_ntsc[] = {
 239         0x00, MR060,            /* MR0, NTSC enabled */
 240         0x01, 0x00,             /* MR1 */
 241         0x02, 0x55,             /* subc. freq. */
 242         0x03, 0x55,             /* subc. freq. */
 243         0x04, 0x55,             /* subc. freq. */
 244         0x05, 0x25,             /* subc. freq. */
 245         0x06, 0x1a,             /* subc. phase */
 246 };
 247
 248 static int
 249 adv7175_command (struct i2c_client *client,
 250                  unsigned int       cmd,
 251                  void              *arg)
 252 {
 253         struct adv7175 *encoder = i2c_get_clientdata(client);
 254
 255         switch (cmd) {
 256
 257         case 0:
 258                 /* This is just for testing!!! */
 259                 adv7175_write_block(client, init_common,
 260                                     sizeof(init_common));
 261                 adv7175_write(client, 0x07, TR0MODE | TR0RST);
 262                 adv7175_write(client, 0x07, TR0MODE);
 263                 break;
 264
 265         case ENCODER_GET_CAPABILITIES:
 266         {
 267                 struct video_encoder_capability *cap = arg;
 268
 269                 cap->flags = VIDEO_ENCODER_PAL |
 270                              VIDEO_ENCODER_NTSC |
 271                              VIDEO_ENCODER_SECAM; /* well, hacky */
 272                 cap->inputs = 2;
 273                 cap->outputs = 1;
 274         }
 275                 break;
 276
 277         case ENCODER_SET_NORM:
 278         {
 279                 int iarg = *(int *) arg;
 280
 281                 switch (iarg) {
 282
 283                 case VIDEO_MODE_NTSC:
 284                         adv7175_write_block(client, init_ntsc,
 285                                             sizeof(init_ntsc));
 286                         if (encoder->input == 0)
 287                                 adv7175_write(client, 0x0d, 0x4f);      // Enable genlock
 288                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
 289                         adv7175_write(client, 0x07, TR0MODE);
 290                         break;
 291
 292                 case VIDEO_MODE_PAL:
 293                         adv7175_write_block(client, init_pal,
 294                                             sizeof(init_pal));
 295                         if (encoder->input == 0)
 296                                 adv7175_write(client, 0x0d, 0x4f);      // Enable genlock
 297                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
 298                         adv7175_write(client, 0x07, TR0MODE);
 299                         break;
 300
 301                 case VIDEO_MODE_SECAM:  // WARNING! ADV7176 does not support SECAM.
 302                         /* This is an attempt to convert
 303                          * SECAM->PAL (typically it does not work
 304                          * due to genlock: when decoder is in SECAM
 305                          * and encoder in in PAL the subcarrier can
 306                          * not be syncronized with horizontal
 307                          * quency) */
 308                         adv7175_write_block(client, init_pal,
 309                                             sizeof(init_pal));
 310                         if (encoder->input == 0)
 311                                 adv7175_write(client, 0x0d, 0x49);      // Disable genlock
 312                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
 313                         adv7175_write(client, 0x07, TR0MODE);
 314                         break;
 315                 default:
 316                         dprintk(1, KERN_ERR "%s: illegal norm: %d\n",
 317                                 I2C_NAME(client), iarg);
 318                         return -EINVAL;
 319
 320                 }
 321                 dprintk(1, KERN_INFO "%s: switched to %s\n", I2C_NAME(client),
 322                         norms[iarg]);
 323                 encoder->norm = iarg;
 324         }
 325                 break;
 326
 327         case ENCODER_SET_INPUT:
 328         {
 329                 int iarg = *(int *) arg;
 330
 331                 /* RJ: *iarg = 0: input is from SAA7110
 332                  *iarg = 1: input is from ZR36060
 333                  *iarg = 2: color bar */
 334
 335                 switch (iarg) {
 336
 337                 case 0:
 338                         adv7175_write(client, 0x01, 0x00);
 339
 340                         if (encoder->norm == VIDEO_MODE_NTSC)
 341                                 set_subcarrier_freq(client, 1);
 342
 343                         adv7175_write(client, 0x0c, TR1CAPT);   /* TR1 */
 344                         if (encoder->norm == VIDEO_MODE_SECAM)
 345                                 adv7175_write(client, 0x0d, 0x49);      // Disable genlock
 346                         else
 347                                 adv7175_write(client, 0x0d, 0x4f);      // Enable genlock
 348                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
 349                         adv7175_write(client, 0x07, TR0MODE);
 350                         //udelay(10);
 351                         break;
 352
 353                 case 1:
 354                         adv7175_write(client, 0x01, 0x00);
 355
 356                         if (encoder->norm == VIDEO_MODE_NTSC)
 357                                 set_subcarrier_freq(client, 0);
 358
 359                         adv7175_write(client, 0x0c, TR1PLAY);   /* TR1 */
 360                         adv7175_write(client, 0x0d, 0x49);
 361                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
 362                         adv7175_write(client, 0x07, TR0MODE);
 363                         //udelay(10);
 364                         break;
 365
 366                 case 2:
 367                         adv7175_write(client, 0x01, 0x80);
 368
 369                         if (encoder->norm == VIDEO_MODE_NTSC)
 370                                 set_subcarrier_freq(client, 0);
 371
 372                         adv7175_write(client, 0x0d, 0x49);
 373                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
 374                         adv7175_write(client, 0x07, TR0MODE);
 375                         //udelay(10);
 376                         break;
 377
 378                 default:
 379                         dprintk(1, KERN_ERR "%s: illegal input: %d\n",
 380                                 I2C_NAME(client), iarg);
 381                         return -EINVAL;
 382
 383                 }
 384                 dprintk(1, KERN_INFO "%s: switched to %s\n", I2C_NAME(client),
 385                         inputs[iarg]);
 386                 encoder->input = iarg;
 387         }
 388                 break;
 389
 390         case ENCODER_SET_OUTPUT:
 391         {
 392                 int *iarg = arg;
 393
 394                 /* not much choice of outputs */
 395                 if (*iarg != 0) {
 396                         return -EINVAL;
 397                 }
 398         }
 399                 break;
 400
 401         case ENCODER_ENABLE_OUTPUT:
 402         {
 403                 int *iarg = arg;
 404
 405                 encoder->enable = !!*iarg;
 406         }
 407                 break;
 408
 409 #ifdef ENCODER_DUMP
 410         case ENCODER_DUMP:
 411         {
 412                 dump(client);
 413         }
 414                 break;
 415 #endif
 416
 417         default:
 418                 return -EINVAL;
 419         }
 420
 421         return 0;
 422 }
 423
 424 /* ----------------------------------------------------------------------- */
 425
 426 /*
 427  * Generic i2c probe
 428  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
 429  */
 430 static unsigned short normal_i2c[] =
 431     { I2C_ADV7175 >> 1, (I2C_ADV7175 >> 1) + 1,
 432         I2C_ADV7176 >> 1, (I2C_ADV7176 >> 1) + 1,
 433         I2C_CLIENT_END
 434 };
 435
 436 static unsigned short ignore = I2C_CLIENT_END;
 437
 438 static struct i2c_client_address_data addr_data = {
 439         .normal_i2c             = normal_i2c,
 440         .probe                  = &ignore,
 441         .ignore                 = &ignore,
 442 };
 443
 444 static struct i2c_driver i2c_driver_adv7175;
 445
 446 static int
 447 adv7175_detect_client (struct i2c_adapter *adapter,
 448                        int                 address,
 449                        int                 kind)
 450 {
 451         int i;
 452         struct i2c_client *client;
 453         struct adv7175 *encoder;
 454         char *dname;
 455
 456         dprintk(1,
 457                 KERN_INFO
 458                 "adv7175.c: detecting adv7175 client on address 0x%x\n",
 459                 address << 1);
 460
 461         /* Check if the adapter supports the needed features */
 462         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 463                 return 0;
 464
 465         client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
 466         if (client == 0)
 467                 return -ENOMEM;
 468         client->addr = address;
 469         client->adapter = adapter;
 470         client->driver = &i2c_driver_adv7175;
 471         if ((client->addr == I2C_ADV7175 >> 1) ||
 472             (client->addr == (I2C_ADV7175 >> 1) + 1)) {
 473                 dname = adv7175_name;
 474         } else if ((client->addr == I2C_ADV7176 >> 1) ||
 475                    (client->addr == (I2C_ADV7176 >> 1) + 1)) {
 476                 dname = adv7176_name;
 477         } else {
 478                 /* We should never get here!!! */
 479                 kfree(client);
 480                 return 0;
 481         }
 482         strlcpy(I2C_NAME(client), dname, sizeof(I2C_NAME(client)));
 483
 484         encoder = kzalloc(sizeof(struct adv7175), GFP_KERNEL);
 485         if (encoder == NULL) {
 486                 kfree(client);
 487                 return -ENOMEM;
 488         }
 489         encoder->norm = VIDEO_MODE_PAL;
 490         encoder->input = 0;
 491         encoder->enable = 1;
 492         i2c_set_clientdata(client, encoder);
 493
 494         i = i2c_attach_client(client);
 495         if (i) {
 496                 kfree(client);
 497                 kfree(encoder);
 498                 return i;
 499         }
 500
 501         i = adv7175_write_block(client, init_common, sizeof(init_common));
 502         if (i >= 0) {
 503                 i = adv7175_write(client, 0x07, TR0MODE | TR0RST);
 504                 i = adv7175_write(client, 0x07, TR0MODE);
 505                 i = adv7175_read(client, 0x12);
 506                 dprintk(1, KERN_INFO "%s_attach: rev. %d at 0x%x\n",
 507                         I2C_NAME(client), i & 1, client->addr << 1);
 508         }
 509         if (i < 0) {
 510                 dprintk(1, KERN_ERR "%s_attach: init error 0x%x\n",
 511                         I2C_NAME(client), i);
 512         }
 513
 514         return 0;
 515 }
 516
 517 static int
 518 adv7175_attach_adapter (struct i2c_adapter *adapter)
 519 {
 520         dprintk(1,
 521                 KERN_INFO
 522                 "adv7175.c: starting probe for adapter %s (0x%x)\n",
 523                 I2C_NAME(adapter), adapter->id);
 524         return i2c_probe(adapter, &addr_data, &adv7175_detect_client);
 525 }
 526
 527 static int
 528 adv7175_detach_client (struct i2c_client *client)
 529 {
 530         struct adv7175 *encoder = i2c_get_clientdata(client);
 531         int err;
 532
 533         err = i2c_detach_client(client);
 534         if (err) {
 535                 return err;
 536         }
 537
 538         kfree(encoder);
 539         kfree(client);
 540
 541         return 0;
 542 }
 543
 544 /* ----------------------------------------------------------------------- */
 545
 546 static struct i2c_driver i2c_driver_adv7175 = {
 547         .driver = {
 548                 .name = "adv7175",      /* name */
 549         },
 550
 551         .id = I2C_DRIVERID_ADV7175,
 552
 553         .attach_adapter = adv7175_attach_adapter,
 554         .detach_client = adv7175_detach_client,
 555         .command = adv7175_command,
 556 };
 557
 558 static int __init
 559 adv7175_init (void)
 560 {
 561         return i2c_add_driver(&i2c_driver_adv7175);
 562 }
 563
 564 static void __exit
 565 adv7175_exit (void)
 566 {
 567         i2c_del_driver(&i2c_driver_adv7175);
 568 }
 569
 570 module_init(adv7175_init);
 571 module_exit(adv7175_exit);