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