drivers/media/video/adv7175.c

   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 <asm/segment.h>
  43 #include <linux/types.h>
  44
  45 #include <linux/videodev.h>
  46 #include <asm/uaccess.h>
  47
  48 MODULE_DESCRIPTION("Analog Devices ADV7175 video encoder 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_encoder.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 adv7175 {
  72         unsigned char reg[128];
  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_ADV7175        0xd4
  84 #define   I2C_ADV7176        0x54
  85
  86 static char adv7175_name[] = "adv7175";
  87 static char adv7176_name[] = "adv7176";
  88
  89 static char *inputs[] = { "pass_through", "play_back", "color_bar" };
  90 static char *norms[] = { "PAL", "NTSC", "SECAM->PAL (may not work!)" };
  91
  92 /* ----------------------------------------------------------------------- */
  93
  94 static inline int
  95 adv7175_write (struct i2c_client *client,
  96                u8                 reg,
  97                u8                 value)
  98 {
  99         struct adv7175 *encoder = i2c_get_clientdata(client);
 100
 101         encoder->reg[reg] = value;
 102         return i2c_smbus_write_byte_data(client, reg, value);
 103 }
 104
 105 static inline int
 106 adv7175_read (struct i2c_client *client,
 107               u8                 reg)
 108 {
 109         return i2c_smbus_read_byte_data(client, reg);
 110 }
 111
 112 static int
 113 adv7175_write_block (struct i2c_client *client,
 114                      const u8          *data,
 115                      unsigned int       len)
 116 {
 117         int ret = -1;
 118         u8 reg;
 119
 120         /* the adv7175 has an autoincrement function, use it if
 121          * the adapter understands raw I2C */
 122         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 123                 /* do raw I2C, not smbus compatible */
 124                 struct adv7175 *encoder = i2c_get_clientdata(client);
 125                 struct i2c_msg msg;
 126                 u8 block_data[32];
 127
 128                 msg.addr = client->addr;
 129                 msg.flags = client->flags;
 130                 while (len >= 2) {
 131                         msg.buf = (char *) block_data;
 132                         msg.len = 0;
 133                         block_data[msg.len++] = reg = data[0];
 134                         do {
 135                                 block_data[msg.len++] =
 136                                     encoder->reg[reg++] = data[1];
 137                                 len -= 2;
 138                                 data += 2;
 139                         } while (len >= 2 && data[0] == reg &&
 140                                  msg.len < 32);
 141                         if ((ret = i2c_transfer(client->adapter,
 142                                                 &msg, 1)) < 0)
 143                                 break;
 144                 }
 145         } else {
 146                 /* do some slow I2C emulation kind of thing */
 147                 while (len >= 2) {
 148                         reg = *data++;
 149                         if ((ret = adv7175_write(client, reg,
 150                                                  *data++)) < 0)
 151                                 break;
 152                         len -= 2;
 153                 }
 154         }
 155
 156         return ret;
 157 }
 158
 159 static void
 160 set_subcarrier_freq (struct i2c_client *client,
 161                      int                pass_through)
 162 {
 163         /* for some reason pass_through NTSC needs
 164          * a different sub-carrier freq to remain stable. */
 165         if(pass_through)
 166                 adv7175_write(client, 0x02, 0x00);
 167         else
 168                 adv7175_write(client, 0x02, 0x55);
 169
 170         adv7175_write(client, 0x03, 0x55);
 171         adv7175_write(client, 0x04, 0x55);
 172         adv7175_write(client, 0x05, 0x25);
 173 }
 174
 175 #ifdef ENCODER_DUMP
 176 static void
 177 dump (struct i2c_client *client)
 178 {
 179         struct adv7175 *encoder = i2c_get_clientdata(client);
 180         int i, j;
 181
 182         printk(KERN_INFO "%s: registry dump\n", I2C_NAME(client));
 183         for (i = 0; i < 182 / 8; i++) {
 184                 printk("%s: 0x%02x -", I2C_NAME(client), i * 8);
 185                 for (j = 0; j < 8; j++) {
 186                         printk(" 0x%02x", encoder->reg[i * 8 + j]);
 187                 }
 188                 printk("\n");
 189         }
 190 }
 191 #endif
 192
 193 /* ----------------------------------------------------------------------- */
 194 // Output filter:  S-Video  Composite
 195
 196 #define MR050       0x11        //0x09
 197 #define MR060       0x14        //0x0c
 198
 199 //---------------------------------------------------------------------------
 200
 201 #define TR0MODE     0x46
 202 #define TR0RST      0x80
 203
 204 #define TR1CAPT     0x80
 205 #define TR1PLAY     0x00
 206
 207 static const unsigned char init_common[] = {
 208
 209         0x00, MR050,            /* MR0, PAL enabled */
 210         0x01, 0x00,             /* MR1 */
 211         0x02, 0x0c,             /* subc. freq. */
 212         0x03, 0x8c,             /* subc. freq. */
 213         0x04, 0x79,             /* subc. freq. */
 214         0x05, 0x26,             /* subc. freq. */
 215         0x06, 0x40,             /* subc. phase */
 216
 217         0x07, TR0MODE,          /* TR0, 16bit */
 218         0x08, 0x21,             /*  */
 219         0x09, 0x00,             /*  */
 220         0x0a, 0x00,             /*  */
 221         0x0b, 0x00,             /*  */
 222         0x0c, TR1CAPT,          /* TR1 */
 223         0x0d, 0x4f,             /* MR2 */
 224         0x0e, 0x00,             /*  */
 225         0x0f, 0x00,             /*  */
 226         0x10, 0x00,             /*  */
 227         0x11, 0x00,             /*  */
 228 };
 229
 230 static const unsigned char init_pal[] = {
 231         0x00, MR050,            /* MR0, PAL enabled */
 232         0x01, 0x00,             /* MR1 */
 233         0x02, 0x0c,             /* subc. freq. */
 234         0x03, 0x8c,             /* subc. freq. */
 235         0x04, 0x79,             /* subc. freq. */
 236         0x05, 0x26,             /* subc. freq. */
 237         0x06, 0x40,             /* subc. phase */
 238 };
 239
 240 static const unsigned char init_ntsc[] = {
 241         0x00, MR060,            /* MR0, NTSC enabled */
 242         0x01, 0x00,             /* MR1 */
 243         0x02, 0x55,             /* subc. freq. */
 244         0x03, 0x55,             /* subc. freq. */
 245         0x04, 0x55,             /* subc. freq. */
 246         0x05, 0x25,             /* subc. freq. */
 247         0x06, 0x1a,             /* subc. phase */
 248 };
 249
 250 static int
 251 adv7175_command (struct i2c_client *client,
 252                  unsigned int       cmd,
 253                  void              *arg)
 254 {
 255         struct adv7175 *encoder = i2c_get_clientdata(client);
 256
 257         switch (cmd) {
 258
 259         case 0:
 260                 /* This is just for testing!!! */
 261                 adv7175_write_block(client, init_common,
 262                                     sizeof(init_common));
 263                 adv7175_write(client, 0x07, TR0MODE | TR0RST);
 264                 adv7175_write(client, 0x07, TR0MODE);
 265                 break;
 266
 267         case ENCODER_GET_CAPABILITIES:
 268         {
 269                 struct video_encoder_capability *cap = arg;
 270
 271                 cap->flags = VIDEO_ENCODER_PAL |
 272                              VIDEO_ENCODER_NTSC |
 273                              VIDEO_ENCODER_SECAM; /* well, hacky */
 274                 cap->inputs = 2;
 275                 cap->outputs = 1;
 276         }
 277                 break;
 278
 279         case ENCODER_SET_NORM:
 280         {
 281                 int iarg = *(int *) arg;
 282
 283                 switch (iarg) {
 284
 285                 case VIDEO_MODE_NTSC:
 286                         adv7175_write_block(client, init_ntsc,
 287                                             sizeof(init_ntsc));
 288                         if (encoder->input == 0)
 289                                 adv7175_write(client, 0x0d, 0x4f);      // Enable genlock
 290                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
 291                         adv7175_write(client, 0x07, TR0MODE);
 292                         break;
 293
 294                 case VIDEO_MODE_PAL:
 295                         adv7175_write_block(client, init_pal,
 296                                             sizeof(init_pal));
 297                         if (encoder->input == 0)
 298                                 adv7175_write(client, 0x0d, 0x4f);      // Enable genlock
 299                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
 300                         adv7175_write(client, 0x07, TR0MODE);
 301                         break;
 302
 303                 case VIDEO_MODE_SECAM:  // WARNING! ADV7176 does not support SECAM.
 304                         /* This is an attempt to convert
 305                          * SECAM->PAL (typically it does not work
 306                          * due to genlock: when decoder is in SECAM
 307                          * and encoder in in PAL the subcarrier can
 308                          * not be syncronized with horizontal
 309                          * quency) */
 310                         adv7175_write_block(client, init_pal,
 311                                             sizeof(init_pal));
 312                         if (encoder->input == 0)
 313                                 adv7175_write(client, 0x0d, 0x49);      // Disable genlock
 314                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
 315                         adv7175_write(client, 0x07, TR0MODE);
 316                         break;
 317                 default:
 318                         dprintk(1, KERN_ERR "%s: illegal norm: %d\n",
 319                                 I2C_NAME(client), iarg);
 320                         return -EINVAL;
 321
 322                 }
 323                 dprintk(1, KERN_INFO "%s: switched to %s\n", I2C_NAME(client),
 324                         norms[iarg]);
 325                 encoder->norm = iarg;
 326         }
 327                 break;
 328
 329         case ENCODER_SET_INPUT:
 330         {
 331                 int iarg = *(int *) arg;
 332
 333                 /* RJ: *iarg = 0: input is from SAA7110
 334                  *iarg = 1: input is from ZR36060
 335                  *iarg = 2: color bar */
 336
 337                 switch (iarg) {
 338
 339                 case 0:
 340                         adv7175_write(client, 0x01, 0x00);
 341
 342                         if (encoder->norm == VIDEO_MODE_NTSC)
 343                                 set_subcarrier_freq(client, 1);
 344
 345                         adv7175_write(client, 0x0c, TR1CAPT);   /* TR1 */
 346                         if (encoder->norm == VIDEO_MODE_SECAM)
 347                                 adv7175_write(client, 0x0d, 0x49);      // Disable genlock
 348                         else
 349                                 adv7175_write(client, 0x0d, 0x4f);      // Enable genlock
 350                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
 351                         adv7175_write(client, 0x07, TR0MODE);
 352                         //udelay(10);
 353                         break;
 354
 355                 case 1:
 356                         adv7175_write(client, 0x01, 0x00);
 357
 358                         if (encoder->norm == VIDEO_MODE_NTSC)
 359                                 set_subcarrier_freq(client, 0);
 360
 361                         adv7175_write(client, 0x0c, TR1PLAY);   /* TR1 */
 362                         adv7175_write(client, 0x0d, 0x49);
 363                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
 364                         adv7175_write(client, 0x07, TR0MODE);
 365                         //udelay(10);
 366                         break;
 367
 368                 case 2:
 369                         adv7175_write(client, 0x01, 0x80);
 370
 371                         if (encoder->norm == VIDEO_MODE_NTSC)
 372                                 set_subcarrier_freq(client, 0);
 373
 374                         adv7175_write(client, 0x0d, 0x49);
 375                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
 376                         adv7175_write(client, 0x07, TR0MODE);
 377                         //udelay(10);
 378                         break;
 379
 380                 default:
 381                         dprintk(1, KERN_ERR "%s: illegal input: %d\n",
 382                                 I2C_NAME(client), iarg);
 383                         return -EINVAL;
 384
 385                 }
 386                 dprintk(1, KERN_INFO "%s: switched to %s\n", I2C_NAME(client),
 387                         inputs[iarg]);
 388                 encoder->input = iarg;
 389         }
 390                 break;
 391
 392         case ENCODER_SET_OUTPUT:
 393         {
 394                 int *iarg = arg;
 395
 396                 /* not much choice of outputs */
 397                 if (*iarg != 0) {
 398                         return -EINVAL;
 399                 }
 400         }
 401                 break;
 402
 403         case ENCODER_ENABLE_OUTPUT:
 404         {
 405                 int *iarg = arg;
 406
 407                 encoder->enable = !!*iarg;
 408         }
 409                 break;
 410
 411 #ifdef ENCODER_DUMP
 412         case ENCODER_DUMP:
 413         {
 414                 dump(client);
 415         }
 416                 break;
 417 #endif
 418
 419         default:
 420                 return -EINVAL;
 421         }
 422
 423         return 0;
 424 }
 425
 426 /* ----------------------------------------------------------------------- */
 427
 428 /*
 429  * Generic i2c probe
 430  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
 431  */
 432 static unsigned short normal_i2c[] =
 433     { I2C_ADV7175 >> 1, (I2C_ADV7175 >> 1) + 1,
 434         I2C_ADV7176 >> 1, (I2C_ADV7176 >> 1) + 1,
 435         I2C_CLIENT_END
 436 };
 437 static unsigned short normal_i2c_range[] = { I2C_CLIENT_END };
 438
 439 static unsigned short probe[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
 440 static unsigned short probe_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
 441 static unsigned short ignore[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
 442 static unsigned short ignore_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
 443 static unsigned short force[2] = { I2C_CLIENT_END , I2C_CLIENT_END };
 444
 445 static struct i2c_client_address_data addr_data = {
 446         .normal_i2c             = normal_i2c,
 447         .normal_i2c_range       = normal_i2c_range,
 448         .probe                  = probe,
 449         .probe_range            = probe_range,
 450         .ignore                 = ignore,
 451         .ignore_range           = ignore_range,
 452         .force                  = force
 453 };
 454
 455 static int adv7175_i2c_id = 0;
 456 static struct i2c_driver i2c_driver_adv7175;
 457
 458 static int
 459 adv7175_detect_client (struct i2c_adapter *adapter,
 460                        int                 address,
 461                        int                 kind)
 462 {
 463         int i;
 464         struct i2c_client *client;
 465         struct adv7175 *encoder;
 466         char *dname;
 467
 468         dprintk(1,
 469                 KERN_INFO
 470                 "adv7175.c: detecting adv7175 client on address 0x%x\n",
 471                 address << 1);
 472
 473         /* Check if the adapter supports the needed features */
 474         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 475                 return 0;
 476
 477         client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
 478         if (client == 0)
 479                 return -ENOMEM;
 480         memset(client, 0, sizeof(struct i2c_client));
 481         client->addr = address;
 482         client->adapter = adapter;
 483         client->driver = &i2c_driver_adv7175;
 484         client->flags = I2C_CLIENT_ALLOW_USE;
 485         client->id = adv7175_i2c_id++;
 486         if ((client->addr == I2C_ADV7175 >> 1) ||
 487             (client->addr == (I2C_ADV7175 >> 1) + 1)) {
 488                 dname = adv7175_name;
 489         } else if ((client->addr == I2C_ADV7176 >> 1) ||
 490                    (client->addr == (I2C_ADV7176 >> 1) + 1)) {
 491                 dname = adv7176_name;
 492         } else {
 493                 /* We should never get here!!! */
 494                 kfree(client);
 495                 return 0;
 496         }
 497         snprintf(I2C_NAME(client), sizeof(I2C_NAME(client)) - 1,
 498                 "%s[%d]", dname, client->id);
 499
 500         encoder = kmalloc(sizeof(struct adv7175), GFP_KERNEL);
 501         if (encoder == NULL) {
 502                 kfree(client);
 503                 return -ENOMEM;
 504         }
 505         memset(encoder, 0, sizeof(struct adv7175));
 506         encoder->norm = VIDEO_MODE_PAL;
 507         encoder->input = 0;
 508         encoder->enable = 1;
 509         i2c_set_clientdata(client, encoder);
 510
 511         i = i2c_attach_client(client);
 512         if (i) {
 513                 kfree(client);
 514                 kfree(encoder);
 515                 return i;
 516         }
 517
 518         i = adv7175_write_block(client, init_common, sizeof(init_common));
 519         if (i >= 0) {
 520                 i = adv7175_write(client, 0x07, TR0MODE | TR0RST);
 521                 i = adv7175_write(client, 0x07, TR0MODE);
 522                 i = adv7175_read(client, 0x12);
 523                 dprintk(1, KERN_INFO "%s_attach: rev. %d at 0x%x\n",
 524                         I2C_NAME(client), i & 1, client->addr << 1);
 525         }
 526         if (i < 0) {
 527                 dprintk(1, KERN_ERR "%s_attach: init error 0x%x\n",
 528                         I2C_NAME(client), i);
 529         }
 530
 531         return 0;
 532 }
 533
 534 static int
 535 adv7175_attach_adapter (struct i2c_adapter *adapter)
 536 {
 537         dprintk(1,
 538                 KERN_INFO
 539                 "adv7175.c: starting probe for adapter %s (0x%x)\n",
 540                 I2C_NAME(adapter), adapter->id);
 541         return i2c_probe(adapter, &addr_data, &adv7175_detect_client);
 542 }
 543
 544 static int
 545 adv7175_detach_client (struct i2c_client *client)
 546 {
 547         struct adv7175 *encoder = i2c_get_clientdata(client);
 548         int err;
 549
 550         err = i2c_detach_client(client);
 551         if (err) {
 552                 return err;
 553         }
 554
 555         kfree(encoder);
 556         kfree(client);
 557
 558         return 0;
 559 }
 560
 561 /* ----------------------------------------------------------------------- */
 562
 563 static struct i2c_driver i2c_driver_adv7175 = {
 564         .owner = THIS_MODULE,
 565         .name = "adv7175",      /* name */
 566
 567         .id = I2C_DRIVERID_ADV7175,
 568         .flags = I2C_DF_NOTIFY,
 569
 570         .attach_adapter = adv7175_attach_adapter,
 571         .detach_client = adv7175_detach_client,
 572         .command = adv7175_command,
 573 };
 574
 575 static int __init
 576 adv7175_init (void)
 577 {
 578         return i2c_add_driver(&i2c_driver_adv7175);
 579 }
 580
 581 static void __exit
 582 adv7175_exit (void)
 583 {
 584         i2c_del_driver(&i2c_driver_adv7175);
 585 }
 586
 587 module_init(adv7175_init);
 588 module_exit(adv7175_exit);