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
  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         int norm;
  71         int input;
  72         int enable;
  73         int bright;
  74         int contrast;
  75         int hue;
  76         int sat;
  77 };
  78
  79 #define   I2C_ADV7175        0xd4
  80 #define   I2C_ADV7176        0x54
  81
  82 static char adv7175_name[] = "adv7175";
  83 static char adv7176_name[] = "adv7176";
  84
  85 static char *inputs[] = { "pass_through", "play_back", "color_bar" };
  86 static char *norms[] = { "PAL", "NTSC", "SECAM->PAL (may not work!)" };
  87
  88 /* ----------------------------------------------------------------------- */
  89
  90 static inline int
  91 adv7175_write (struct i2c_client *client,
  92                u8                 reg,
  93                u8                 value)
  94 {
  95         return i2c_smbus_write_byte_data(client, reg, value);
  96 }
  97
  98 static inline int
  99 adv7175_read (struct i2c_client *client,
 100               u8                 reg)
 101 {
 102         return i2c_smbus_read_byte_data(client, reg);
 103 }
 104
 105 static int
 106 adv7175_write_block (struct i2c_client *client,
 107                      const u8          *data,
 108                      unsigned int       len)
 109 {
 110         int ret = -1;
 111         u8 reg;
 112
 113         /* the adv7175 has an autoincrement function, use it if
 114          * the adapter understands raw I2C */
 115         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 116                 /* do raw I2C, not smbus compatible */
 117                 u8 block_data[32];
 118                 int block_len;
 119
 120                 while (len >= 2) {
 121                         block_len = 0;
 122                         block_data[block_len++] = reg = data[0];
 123                         do {
 124                                 block_data[block_len++] = data[1];
 125                                 reg++;
 126                                 len -= 2;
 127                                 data += 2;
 128                         } while (len >= 2 && data[0] == reg &&
 129                                  block_len < 32);
 130                         if ((ret = i2c_master_send(client, block_data,
 131                                                    block_len)) < 0)
 132                                 break;
 133                 }
 134         } else {
 135                 /* do some slow I2C emulation kind of thing */
 136                 while (len >= 2) {
 137                         reg = *data++;
 138                         if ((ret = adv7175_write(client, reg,
 139                                                  *data++)) < 0)
 140                                 break;
 141                         len -= 2;
 142                 }
 143         }
 144
 145         return ret;
 146 }
 147
 148 static void
 149 set_subcarrier_freq (struct i2c_client *client,
 150                      int                pass_through)
 151 {
 152         /* for some reason pass_through NTSC needs
 153          * a different sub-carrier freq to remain stable. */
 154         if(pass_through)
 155                 adv7175_write(client, 0x02, 0x00);
 156         else
 157                 adv7175_write(client, 0x02, 0x55);
 158
 159         adv7175_write(client, 0x03, 0x55);
 160         adv7175_write(client, 0x04, 0x55);
 161         adv7175_write(client, 0x05, 0x25);
 162 }
 163
 164 /* ----------------------------------------------------------------------- */
 165 // Output filter:  S-Video  Composite
 166
 167 #define MR050       0x11        //0x09
 168 #define MR060       0x14        //0x0c
 169
 170 //---------------------------------------------------------------------------
 171
 172 #define TR0MODE     0x46
 173 #define TR0RST      0x80
 174
 175 #define TR1CAPT     0x80
 176 #define TR1PLAY     0x00
 177
 178 static const unsigned char init_common[] = {
 179
 180         0x00, MR050,            /* MR0, PAL enabled */
 181         0x01, 0x00,             /* MR1 */
 182         0x02, 0x0c,             /* subc. freq. */
 183         0x03, 0x8c,             /* subc. freq. */
 184         0x04, 0x79,             /* subc. freq. */
 185         0x05, 0x26,             /* subc. freq. */
 186         0x06, 0x40,             /* subc. phase */
 187
 188         0x07, TR0MODE,          /* TR0, 16bit */
 189         0x08, 0x21,             /*  */
 190         0x09, 0x00,             /*  */
 191         0x0a, 0x00,             /*  */
 192         0x0b, 0x00,             /*  */
 193         0x0c, TR1CAPT,          /* TR1 */
 194         0x0d, 0x4f,             /* MR2 */
 195         0x0e, 0x00,             /*  */
 196         0x0f, 0x00,             /*  */
 197         0x10, 0x00,             /*  */
 198         0x11, 0x00,             /*  */
 199 };
 200
 201 static const unsigned char init_pal[] = {
 202         0x00, MR050,            /* MR0, PAL enabled */
 203         0x01, 0x00,             /* MR1 */
 204         0x02, 0x0c,             /* subc. freq. */
 205         0x03, 0x8c,             /* subc. freq. */
 206         0x04, 0x79,             /* subc. freq. */
 207         0x05, 0x26,             /* subc. freq. */
 208         0x06, 0x40,             /* subc. phase */
 209 };
 210
 211 static const unsigned char init_ntsc[] = {
 212         0x00, MR060,            /* MR0, NTSC enabled */
 213         0x01, 0x00,             /* MR1 */
 214         0x02, 0x55,             /* subc. freq. */
 215         0x03, 0x55,             /* subc. freq. */
 216         0x04, 0x55,             /* subc. freq. */
 217         0x05, 0x25,             /* subc. freq. */
 218         0x06, 0x1a,             /* subc. phase */
 219 };
 220
 221 static int
 222 adv7175_command (struct i2c_client *client,
 223                  unsigned int       cmd,
 224                  void              *arg)
 225 {
 226         struct adv7175 *encoder = i2c_get_clientdata(client);
 227
 228         switch (cmd) {
 229
 230         case 0:
 231                 /* This is just for testing!!! */
 232                 adv7175_write_block(client, init_common,
 233                                     sizeof(init_common));
 234                 adv7175_write(client, 0x07, TR0MODE | TR0RST);
 235                 adv7175_write(client, 0x07, TR0MODE);
 236                 break;
 237
 238         case ENCODER_GET_CAPABILITIES:
 239         {
 240                 struct video_encoder_capability *cap = arg;
 241
 242                 cap->flags = VIDEO_ENCODER_PAL |
 243                              VIDEO_ENCODER_NTSC |
 244                              VIDEO_ENCODER_SECAM; /* well, hacky */
 245                 cap->inputs = 2;
 246                 cap->outputs = 1;
 247         }
 248                 break;
 249
 250         case ENCODER_SET_NORM:
 251         {
 252                 int iarg = *(int *) arg;
 253
 254                 switch (iarg) {
 255
 256                 case VIDEO_MODE_NTSC:
 257                         adv7175_write_block(client, init_ntsc,
 258                                             sizeof(init_ntsc));
 259                         if (encoder->input == 0)
 260                                 adv7175_write(client, 0x0d, 0x4f);      // Enable genlock
 261                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
 262                         adv7175_write(client, 0x07, TR0MODE);
 263                         break;
 264
 265                 case VIDEO_MODE_PAL:
 266                         adv7175_write_block(client, init_pal,
 267                                             sizeof(init_pal));
 268                         if (encoder->input == 0)
 269                                 adv7175_write(client, 0x0d, 0x4f);      // Enable genlock
 270                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
 271                         adv7175_write(client, 0x07, TR0MODE);
 272                         break;
 273
 274                 case VIDEO_MODE_SECAM:  // WARNING! ADV7176 does not support SECAM.
 275                         /* This is an attempt to convert
 276                          * SECAM->PAL (typically it does not work
 277                          * due to genlock: when decoder is in SECAM
 278                          * and encoder in in PAL the subcarrier can
 279                          * not be syncronized with horizontal
 280                          * quency) */
 281                         adv7175_write_block(client, init_pal,
 282                                             sizeof(init_pal));
 283                         if (encoder->input == 0)
 284                                 adv7175_write(client, 0x0d, 0x49);      // Disable genlock
 285                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
 286                         adv7175_write(client, 0x07, TR0MODE);
 287                         break;
 288                 default:
 289                         dprintk(1, KERN_ERR "%s: illegal norm: %d\n",
 290                                 I2C_NAME(client), iarg);
 291                         return -EINVAL;
 292
 293                 }
 294                 dprintk(1, KERN_INFO "%s: switched to %s\n", I2C_NAME(client),
 295                         norms[iarg]);
 296                 encoder->norm = iarg;
 297         }
 298                 break;
 299
 300         case ENCODER_SET_INPUT:
 301         {
 302                 int iarg = *(int *) arg;
 303
 304                 /* RJ: *iarg = 0: input is from SAA7110
 305                  *iarg = 1: input is from ZR36060
 306                  *iarg = 2: color bar */
 307
 308                 switch (iarg) {
 309
 310                 case 0:
 311                         adv7175_write(client, 0x01, 0x00);
 312
 313                         if (encoder->norm == VIDEO_MODE_NTSC)
 314                                 set_subcarrier_freq(client, 1);
 315
 316                         adv7175_write(client, 0x0c, TR1CAPT);   /* TR1 */
 317                         if (encoder->norm == VIDEO_MODE_SECAM)
 318                                 adv7175_write(client, 0x0d, 0x49);      // Disable genlock
 319                         else
 320                                 adv7175_write(client, 0x0d, 0x4f);      // Enable genlock
 321                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
 322                         adv7175_write(client, 0x07, TR0MODE);
 323                         //udelay(10);
 324                         break;
 325
 326                 case 1:
 327                         adv7175_write(client, 0x01, 0x00);
 328
 329                         if (encoder->norm == VIDEO_MODE_NTSC)
 330                                 set_subcarrier_freq(client, 0);
 331
 332                         adv7175_write(client, 0x0c, TR1PLAY);   /* TR1 */
 333                         adv7175_write(client, 0x0d, 0x49);
 334                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
 335                         adv7175_write(client, 0x07, TR0MODE);
 336                         //udelay(10);
 337                         break;
 338
 339                 case 2:
 340                         adv7175_write(client, 0x01, 0x80);
 341
 342                         if (encoder->norm == VIDEO_MODE_NTSC)
 343                                 set_subcarrier_freq(client, 0);
 344
 345                         adv7175_write(client, 0x0d, 0x49);
 346                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
 347                         adv7175_write(client, 0x07, TR0MODE);
 348                         //udelay(10);
 349                         break;
 350
 351                 default:
 352                         dprintk(1, KERN_ERR "%s: illegal input: %d\n",
 353                                 I2C_NAME(client), iarg);
 354                         return -EINVAL;
 355
 356                 }
 357                 dprintk(1, KERN_INFO "%s: switched to %s\n", I2C_NAME(client),
 358                         inputs[iarg]);
 359                 encoder->input = iarg;
 360         }
 361                 break;
 362
 363         case ENCODER_SET_OUTPUT:
 364         {
 365                 int *iarg = arg;
 366
 367                 /* not much choice of outputs */
 368                 if (*iarg != 0) {
 369                         return -EINVAL;
 370                 }
 371         }
 372                 break;
 373
 374         case ENCODER_ENABLE_OUTPUT:
 375         {
 376                 int *iarg = arg;
 377
 378                 encoder->enable = !!*iarg;
 379         }
 380                 break;
 381
 382         default:
 383                 return -EINVAL;
 384         }
 385
 386         return 0;
 387 }
 388
 389 /* ----------------------------------------------------------------------- */
 390
 391 /*
 392  * Generic i2c probe
 393  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
 394  */
 395 static unsigned short normal_i2c[] =
 396     { I2C_ADV7175 >> 1, (I2C_ADV7175 >> 1) + 1,
 397         I2C_ADV7176 >> 1, (I2C_ADV7176 >> 1) + 1,
 398         I2C_CLIENT_END
 399 };
 400
 401 static unsigned short ignore = I2C_CLIENT_END;
 402
 403 static struct i2c_client_address_data addr_data = {
 404         .normal_i2c             = normal_i2c,
 405         .probe                  = &ignore,
 406         .ignore                 = &ignore,
 407 };
 408
 409 static struct i2c_driver i2c_driver_adv7175;
 410
 411 static int
 412 adv7175_detect_client (struct i2c_adapter *adapter,
 413                        int                 address,
 414                        int                 kind)
 415 {
 416         int i;
 417         struct i2c_client *client;
 418         struct adv7175 *encoder;
 419         char *dname;
 420
 421         dprintk(1,
 422                 KERN_INFO
 423                 "adv7175.c: detecting adv7175 client on address 0x%x\n",
 424                 address << 1);
 425
 426         /* Check if the adapter supports the needed features */
 427         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 428                 return 0;
 429
 430         client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
 431         if (client == 0)
 432                 return -ENOMEM;
 433         client->addr = address;
 434         client->adapter = adapter;
 435         client->driver = &i2c_driver_adv7175;
 436         if ((client->addr == I2C_ADV7175 >> 1) ||
 437             (client->addr == (I2C_ADV7175 >> 1) + 1)) {
 438                 dname = adv7175_name;
 439         } else if ((client->addr == I2C_ADV7176 >> 1) ||
 440                    (client->addr == (I2C_ADV7176 >> 1) + 1)) {
 441                 dname = adv7176_name;
 442         } else {
 443                 /* We should never get here!!! */
 444                 kfree(client);
 445                 return 0;
 446         }
 447         strlcpy(I2C_NAME(client), dname, sizeof(I2C_NAME(client)));
 448
 449         encoder = kzalloc(sizeof(struct adv7175), GFP_KERNEL);
 450         if (encoder == NULL) {
 451                 kfree(client);
 452                 return -ENOMEM;
 453         }
 454         encoder->norm = VIDEO_MODE_PAL;
 455         encoder->input = 0;
 456         encoder->enable = 1;
 457         i2c_set_clientdata(client, encoder);
 458
 459         i = i2c_attach_client(client);
 460         if (i) {
 461                 kfree(client);
 462                 kfree(encoder);
 463                 return i;
 464         }
 465
 466         i = adv7175_write_block(client, init_common, sizeof(init_common));
 467         if (i >= 0) {
 468                 i = adv7175_write(client, 0x07, TR0MODE | TR0RST);
 469                 i = adv7175_write(client, 0x07, TR0MODE);
 470                 i = adv7175_read(client, 0x12);
 471                 dprintk(1, KERN_INFO "%s_attach: rev. %d at 0x%x\n",
 472                         I2C_NAME(client), i & 1, client->addr << 1);
 473         }
 474         if (i < 0) {
 475                 dprintk(1, KERN_ERR "%s_attach: init error 0x%x\n",
 476                         I2C_NAME(client), i);
 477         }
 478
 479         return 0;
 480 }
 481
 482 static int
 483 adv7175_attach_adapter (struct i2c_adapter *adapter)
 484 {
 485         dprintk(1,
 486                 KERN_INFO
 487                 "adv7175.c: starting probe for adapter %s (0x%x)\n",
 488                 I2C_NAME(adapter), adapter->id);
 489         return i2c_probe(adapter, &addr_data, &adv7175_detect_client);
 490 }
 491
 492 static int
 493 adv7175_detach_client (struct i2c_client *client)
 494 {
 495         struct adv7175 *encoder = i2c_get_clientdata(client);
 496         int err;
 497
 498         err = i2c_detach_client(client);
 499         if (err) {
 500                 return err;
 501         }
 502
 503         kfree(encoder);
 504         kfree(client);
 505
 506         return 0;
 507 }
 508
 509 /* ----------------------------------------------------------------------- */
 510
 511 static struct i2c_driver i2c_driver_adv7175 = {
 512         .driver = {
 513                 .name = "adv7175",      /* name */
 514         },
 515
 516         .id = I2C_DRIVERID_ADV7175,
 517
 518         .attach_adapter = adv7175_attach_adapter,
 519         .detach_client = adv7175_detach_client,
 520         .command = adv7175_command,
 521 };
 522
 523 static int __init
 524 adv7175_init (void)
 525 {
 526         return i2c_add_driver(&i2c_driver_adv7175);
 527 }
 528
 529 static void __exit
 530 adv7175_exit (void)
 531 {
 532         i2c_del_driver(&i2c_driver_adv7175);
 533 }
 534
 535 module_init(adv7175_init);
 536 module_exit(adv7175_exit);