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 <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 #include <linux/i2c-dev.h>
  53
  54 #define I2C_NAME(s) (s)->name
  55
  56 #include <linux/video_encoder.h>
  57
  58 static int debug = 0;
  59 module_param(debug, int, 0);
  60 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  61
  62 #define dprintk(num, format, args...) \
  63         do { \
  64                 if (debug >= num) \
  65                         printk(format, ##args); \
  66         } while (0)
  67
  68 /* ----------------------------------------------------------------------- */
  69
  70 struct adv7175 {
  71         unsigned char reg[128];
  72
  73         int norm;
  74         int input;
  75         int enable;
  76         int bright;
  77         int contrast;
  78         int hue;
  79         int sat;
  80 };
  81
  82 #define   I2C_ADV7175        0xd4
  83 #define   I2C_ADV7176        0x54
  84
  85 static char adv7175_name[] = "adv7175";
  86 static char adv7176_name[] = "adv7176";
  87
  88 static char *inputs[] = { "pass_through", "play_back", "color_bar" };
  89 static char *norms[] = { "PAL", "NTSC", "SECAM->PAL (may not work!)" };
  90
  91 /* ----------------------------------------------------------------------- */
  92
  93 static inline int
  94 adv7175_write (struct i2c_client *client,
  95                u8                 reg,
  96                u8                 value)
  97 {
  98         struct adv7175 *encoder = i2c_get_clientdata(client);
  99
 100         encoder->reg[reg] = value;
 101         return i2c_smbus_write_byte_data(client, reg, value);
 102 }
 103
 104 static inline int
 105 adv7175_read (struct i2c_client *client,
 106               u8                 reg)
 107 {
 108         return i2c_smbus_read_byte_data(client, reg);
 109 }
 110
 111 static int
 112 adv7175_write_block (struct i2c_client *client,
 113                      const u8          *data,
 114                      unsigned int       len)
 115 {
 116         int ret = -1;
 117         u8 reg;
 118
 119         /* the adv7175 has an autoincrement function, use it if
 120          * the adapter understands raw I2C */
 121         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 122                 /* do raw I2C, not smbus compatible */
 123                 struct adv7175 *encoder = i2c_get_clientdata(client);
 124                 struct i2c_msg msg;
 125                 u8 block_data[32];
 126
 127                 msg.addr = client->addr;
 128                 msg.flags = 0;
 129                 while (len >= 2) {
 130                         msg.buf = (char *) block_data;
 131                         msg.len = 0;
 132                         block_data[msg.len++] = reg = data[0];
 133                         do {
 134                                 block_data[msg.len++] =
 135                                     encoder->reg[reg++] = data[1];
 136                                 len -= 2;
 137                                 data += 2;
 138                         } while (len >= 2 && data[0] == reg &&
 139                                  msg.len < 32);
 140                         if ((ret = i2c_transfer(client->adapter,
 141                                                 &msg, 1)) < 0)
 142                                 break;
 143                 }
 144         } else {
 145                 /* do some slow I2C emulation kind of thing */
 146                 while (len >= 2) {
 147                         reg = *data++;
 148                         if ((ret = adv7175_write(client, reg,
 149                                                  *data++)) < 0)
 150                                 break;
 151                         len -= 2;
 152                 }
 153         }
 154
 155         return ret;
 156 }
 157
 158 static void
 159 set_subcarrier_freq (struct i2c_client *client,
 160                      int                pass_through)
 161 {
 162         /* for some reason pass_through NTSC needs
 163          * a different sub-carrier freq to remain stable. */
 164         if(pass_through)
 165                 adv7175_write(client, 0x02, 0x00);
 166         else
 167                 adv7175_write(client, 0x02, 0x55);
 168
 169         adv7175_write(client, 0x03, 0x55);
 170         adv7175_write(client, 0x04, 0x55);
 171         adv7175_write(client, 0x05, 0x25);
 172 }
 173
 174 #ifdef ENCODER_DUMP
 175 static void
 176 dump (struct i2c_client *client)
 177 {
 178         struct adv7175 *encoder = i2c_get_clientdata(client);
 179         int i, j;
 180
 181         printk(KERN_INFO "%s: registry dump\n", I2C_NAME(client));
 182         for (i = 0; i < 182 / 8; i++) {
 183                 printk("%s: 0x%02x -", I2C_NAME(client), i * 8);
 184                 for (j = 0; j < 8; j++) {
 185                         printk(" 0x%02x", encoder->reg[i * 8 + j]);
 186                 }
 187                 printk("\n");
 188         }
 189 }
 190 #endif
 191
 192 /* ----------------------------------------------------------------------- */
 193 // Output filter:  S-Video  Composite
 194
 195 #define MR050       0x11        //0x09
 196 #define MR060       0x14        //0x0c
 197
 198 //---------------------------------------------------------------------------
 199
 200 #define TR0MODE     0x46
 201 #define TR0RST      0x80
 202
 203 #define TR1CAPT     0x80
 204 #define TR1PLAY     0x00
 205
 206 static const unsigned char init_common[] = {
 207
 208         0x00, MR050,            /* MR0, PAL enabled */
 209         0x01, 0x00,             /* MR1 */
 210         0x02, 0x0c,             /* subc. freq. */
 211         0x03, 0x8c,             /* subc. freq. */
 212         0x04, 0x79,             /* subc. freq. */
 213         0x05, 0x26,             /* subc. freq. */
 214         0x06, 0x40,             /* subc. phase */
 215
 216         0x07, TR0MODE,          /* TR0, 16bit */
 217         0x08, 0x21,             /*  */
 218         0x09, 0x00,             /*  */
 219         0x0a, 0x00,             /*  */
 220         0x0b, 0x00,             /*  */
 221         0x0c, TR1CAPT,          /* TR1 */
 222         0x0d, 0x4f,             /* MR2 */
 223         0x0e, 0x00,             /*  */
 224         0x0f, 0x00,             /*  */
 225         0x10, 0x00,             /*  */
 226         0x11, 0x00,             /*  */
 227 };
 228
 229 static const unsigned char init_pal[] = {
 230         0x00, MR050,            /* MR0, PAL enabled */
 231         0x01, 0x00,             /* MR1 */
 232         0x02, 0x0c,             /* subc. freq. */
 233         0x03, 0x8c,             /* subc. freq. */
 234         0x04, 0x79,             /* subc. freq. */
 235         0x05, 0x26,             /* subc. freq. */
 236         0x06, 0x40,             /* subc. phase */
 237 };
 238
 239 static const unsigned char init_ntsc[] = {
 240         0x00, MR060,            /* MR0, NTSC enabled */
 241         0x01, 0x00,             /* MR1 */
 242         0x02, 0x55,             /* subc. freq. */
 243         0x03, 0x55,             /* subc. freq. */
 244         0x04, 0x55,             /* subc. freq. */
 245         0x05, 0x25,             /* subc. freq. */
 246         0x06, 0x1a,             /* subc. phase */
 247 };
 248
 249 static int
 250 adv7175_command (struct i2c_client *client,
 251                  unsigned int       cmd,
 252                  void              *arg)
 253 {
 254         struct adv7175 *encoder = i2c_get_clientdata(client);
 255
 256         switch (cmd) {
 257
 258         case 0:
 259                 /* This is just for testing!!! */
 260                 adv7175_write_block(client, init_common,
 261                                     sizeof(init_common));
 262                 adv7175_write(client, 0x07, TR0MODE | TR0RST);
 263                 adv7175_write(client, 0x07, TR0MODE);
 264                 break;
 265
 266         case ENCODER_GET_CAPABILITIES:
 267         {
 268                 struct video_encoder_capability *cap = arg;
 269
 270                 cap->flags = VIDEO_ENCODER_PAL |
 271                              VIDEO_ENCODER_NTSC |
 272                              VIDEO_ENCODER_SECAM; /* well, hacky */
 273                 cap->inputs = 2;
 274                 cap->outputs = 1;
 275         }
 276                 break;
 277
 278         case ENCODER_SET_NORM:
 279         {
 280                 int iarg = *(int *) arg;
 281
 282                 switch (iarg) {
 283
 284                 case VIDEO_MODE_NTSC:
 285                         adv7175_write_block(client, init_ntsc,
 286                                             sizeof(init_ntsc));
 287                         if (encoder->input == 0)
 288                                 adv7175_write(client, 0x0d, 0x4f);      // Enable genlock
 289                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
 290                         adv7175_write(client, 0x07, TR0MODE);
 291                         break;
 292
 293                 case VIDEO_MODE_PAL:
 294                         adv7175_write_block(client, init_pal,
 295                                             sizeof(init_pal));
 296                         if (encoder->input == 0)
 297                                 adv7175_write(client, 0x0d, 0x4f);      // Enable genlock
 298                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
 299                         adv7175_write(client, 0x07, TR0MODE);
 300                         break;
 301
 302                 case VIDEO_MODE_SECAM:  // WARNING! ADV7176 does not support SECAM.
 303                         /* This is an attempt to convert
 304                          * SECAM->PAL (typically it does not work
 305                          * due to genlock: when decoder is in SECAM
 306                          * and encoder in in PAL the subcarrier can
 307                          * not be syncronized with horizontal
 308                          * quency) */
 309                         adv7175_write_block(client, init_pal,
 310                                             sizeof(init_pal));
 311                         if (encoder->input == 0)
 312                                 adv7175_write(client, 0x0d, 0x49);      // Disable genlock
 313                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
 314                         adv7175_write(client, 0x07, TR0MODE);
 315                         break;
 316                 default:
 317                         dprintk(1, KERN_ERR "%s: illegal norm: %d\n",
 318                                 I2C_NAME(client), iarg);
 319                         return -EINVAL;
 320
 321                 }
 322                 dprintk(1, KERN_INFO "%s: switched to %s\n", I2C_NAME(client),
 323                         norms[iarg]);
 324                 encoder->norm = iarg;
 325         }
 326                 break;
 327
 328         case ENCODER_SET_INPUT:
 329         {
 330                 int iarg = *(int *) arg;
 331
 332                 /* RJ: *iarg = 0: input is from SAA7110
 333                  *iarg = 1: input is from ZR36060
 334                  *iarg = 2: color bar */
 335
 336                 switch (iarg) {
 337
 338                 case 0:
 339                         adv7175_write(client, 0x01, 0x00);
 340
 341                         if (encoder->norm == VIDEO_MODE_NTSC)
 342                                 set_subcarrier_freq(client, 1);
 343
 344                         adv7175_write(client, 0x0c, TR1CAPT);   /* TR1 */
 345                         if (encoder->norm == VIDEO_MODE_SECAM)
 346                                 adv7175_write(client, 0x0d, 0x49);      // Disable genlock
 347                         else
 348                                 adv7175_write(client, 0x0d, 0x4f);      // Enable genlock
 349                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
 350                         adv7175_write(client, 0x07, TR0MODE);
 351                         //udelay(10);
 352                         break;
 353
 354                 case 1:
 355                         adv7175_write(client, 0x01, 0x00);
 356
 357                         if (encoder->norm == VIDEO_MODE_NTSC)
 358                                 set_subcarrier_freq(client, 0);
 359
 360                         adv7175_write(client, 0x0c, TR1PLAY);   /* TR1 */
 361                         adv7175_write(client, 0x0d, 0x49);
 362                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
 363                         adv7175_write(client, 0x07, TR0MODE);
 364                         //udelay(10);
 365                         break;
 366
 367                 case 2:
 368                         adv7175_write(client, 0x01, 0x80);
 369
 370                         if (encoder->norm == VIDEO_MODE_NTSC)
 371                                 set_subcarrier_freq(client, 0);
 372
 373                         adv7175_write(client, 0x0d, 0x49);
 374                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
 375                         adv7175_write(client, 0x07, TR0MODE);
 376                         //udelay(10);
 377                         break;
 378
 379                 default:
 380                         dprintk(1, KERN_ERR "%s: illegal input: %d\n",
 381                                 I2C_NAME(client), iarg);
 382                         return -EINVAL;
 383
 384                 }
 385                 dprintk(1, KERN_INFO "%s: switched to %s\n", I2C_NAME(client),
 386                         inputs[iarg]);
 387                 encoder->input = iarg;
 388         }
 389                 break;
 390
 391         case ENCODER_SET_OUTPUT:
 392         {
 393                 int *iarg = arg;
 394
 395                 /* not much choice of outputs */
 396                 if (*iarg != 0) {
 397                         return -EINVAL;
 398                 }
 399         }
 400                 break;
 401
 402         case ENCODER_ENABLE_OUTPUT:
 403         {
 404                 int *iarg = arg;
 405
 406                 encoder->enable = !!*iarg;
 407         }
 408                 break;
 409
 410 #ifdef ENCODER_DUMP
 411         case ENCODER_DUMP:
 412         {
 413                 dump(client);
 414         }
 415                 break;
 416 #endif
 417
 418         default:
 419                 return -EINVAL;
 420         }
 421
 422         return 0;
 423 }
 424
 425 /* ----------------------------------------------------------------------- */
 426
 427 /*
 428  * Generic i2c probe
 429  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
 430  */
 431 static unsigned short normal_i2c[] =
 432     { I2C_ADV7175 >> 1, (I2C_ADV7175 >> 1) + 1,
 433         I2C_ADV7176 >> 1, (I2C_ADV7176 >> 1) + 1,
 434         I2C_CLIENT_END
 435 };
 436
 437 static unsigned short ignore = I2C_CLIENT_END;
 438
 439 static struct i2c_client_address_data addr_data = {
 440         .normal_i2c             = normal_i2c,
 441         .probe                  = &ignore,
 442         .ignore                 = &ignore,
 443 };
 444
 445 static struct i2c_driver i2c_driver_adv7175;
 446
 447 static int
 448 adv7175_detect_client (struct i2c_adapter *adapter,
 449                        int                 address,
 450                        int                 kind)
 451 {
 452         int i;
 453         struct i2c_client *client;
 454         struct adv7175 *encoder;
 455         char *dname;
 456
 457         dprintk(1,
 458                 KERN_INFO
 459                 "adv7175.c: detecting adv7175 client on address 0x%x\n",
 460                 address << 1);
 461
 462         /* Check if the adapter supports the needed features */
 463         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 464                 return 0;
 465
 466         client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
 467         if (client == 0)
 468                 return -ENOMEM;
 469         memset(client, 0, sizeof(struct i2c_client));
 470         client->addr = address;
 471         client->adapter = adapter;
 472         client->driver = &i2c_driver_adv7175;
 473         client->flags = I2C_CLIENT_ALLOW_USE;
 474         if ((client->addr == I2C_ADV7175 >> 1) ||
 475             (client->addr == (I2C_ADV7175 >> 1) + 1)) {
 476                 dname = adv7175_name;
 477         } else if ((client->addr == I2C_ADV7176 >> 1) ||
 478                    (client->addr == (I2C_ADV7176 >> 1) + 1)) {
 479                 dname = adv7176_name;
 480         } else {
 481                 /* We should never get here!!! */
 482                 kfree(client);
 483                 return 0;
 484         }
 485         strlcpy(I2C_NAME(client), dname, sizeof(I2C_NAME(client)));
 486
 487         encoder = kmalloc(sizeof(struct adv7175), GFP_KERNEL);
 488         if (encoder == NULL) {
 489                 kfree(client);
 490                 return -ENOMEM;
 491         }
 492         memset(encoder, 0, sizeof(struct adv7175));
 493         encoder->norm = VIDEO_MODE_PAL;
 494         encoder->input = 0;
 495         encoder->enable = 1;
 496         i2c_set_clientdata(client, encoder);
 497
 498         i = i2c_attach_client(client);
 499         if (i) {
 500                 kfree(client);
 501                 kfree(encoder);
 502                 return i;
 503         }
 504
 505         i = adv7175_write_block(client, init_common, sizeof(init_common));
 506         if (i >= 0) {
 507                 i = adv7175_write(client, 0x07, TR0MODE | TR0RST);
 508                 i = adv7175_write(client, 0x07, TR0MODE);
 509                 i = adv7175_read(client, 0x12);
 510                 dprintk(1, KERN_INFO "%s_attach: rev. %d at 0x%x\n",
 511                         I2C_NAME(client), i & 1, client->addr << 1);
 512         }
 513         if (i < 0) {
 514                 dprintk(1, KERN_ERR "%s_attach: init error 0x%x\n",
 515                         I2C_NAME(client), i);
 516         }
 517
 518         return 0;
 519 }
 520
 521 static int
 522 adv7175_attach_adapter (struct i2c_adapter *adapter)
 523 {
 524         dprintk(1,
 525                 KERN_INFO
 526                 "adv7175.c: starting probe for adapter %s (0x%x)\n",
 527                 I2C_NAME(adapter), adapter->id);
 528         return i2c_probe(adapter, &addr_data, &adv7175_detect_client);
 529 }
 530
 531 static int
 532 adv7175_detach_client (struct i2c_client *client)
 533 {
 534         struct adv7175 *encoder = i2c_get_clientdata(client);
 535         int err;
 536
 537         err = i2c_detach_client(client);
 538         if (err) {
 539                 return err;
 540         }
 541
 542         kfree(encoder);
 543         kfree(client);
 544
 545         return 0;
 546 }
 547
 548 /* ----------------------------------------------------------------------- */
 549
 550 static struct i2c_driver i2c_driver_adv7175 = {
 551         .owner = THIS_MODULE,
 552         .name = "adv7175",      /* name */
 553
 554         .id = I2C_DRIVERID_ADV7175,
 555
 556         .attach_adapter = adv7175_attach_adapter,
 557         .detach_client = adv7175_detach_client,
 558         .command = adv7175_command,
 559 };
 560
 561 static int __init
 562 adv7175_init (void)
 563 {
 564         return i2c_add_driver(&i2c_driver_adv7175);
 565 }
 566
 567 static void __exit
 568 adv7175_exit (void)
 569 {
 570         i2c_del_driver(&i2c_driver_adv7175);
 571 }
 572
 573 module_init(adv7175_init);
 574 module_exit(adv7175_exit);