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