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/signal.h>
  37 #include <linux/types.h>
  38 #include <linux/i2c.h>
  39 #include <asm/io.h>
  40 #include <asm/pgtable.h>
  41 #include <asm/page.h>
  42 #include <asm/uaccess.h>
  43
  44 #include <linux/videodev.h>
  45 #include <linux/video_encoder.h>
  46
  47 MODULE_DESCRIPTION("Analog Devices ADV7175 video encoder driver");
  48 MODULE_AUTHOR("Dave Perks");
  49 MODULE_LICENSE("GPL");
  50
  51
  52 #define I2C_NAME(s) (s)->name
  53
  54
  55 static int debug = 0;
  56 module_param(debug, int, 0);
  57 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  58
  59 #define dprintk(num, format, args...) \
  60         do { \
  61                 if (debug >= num) \
  62                         printk(format, ##args); \
  63         } while (0)
  64
  65 /* ----------------------------------------------------------------------- */
  66
  67 struct adv7175 {
  68         int norm;
  69         int input;
  70         int enable;
  71         int bright;
  72         int contrast;
  73         int hue;
  74         int sat;
  75 };
  76
  77 #define   I2C_ADV7175        0xd4
  78 #define   I2C_ADV7176        0x54
  79
  80 static char adv7175_name[] = "adv7175";
  81 static char adv7176_name[] = "adv7176";
  82
  83 static char *inputs[] = { "pass_through", "play_back", "color_bar" };
  84 static char *norms[] = { "PAL", "NTSC", "SECAM->PAL (may not work!)" };
  85
  86 /* ----------------------------------------------------------------------- */
  87
  88 static inline int
  89 adv7175_write (struct i2c_client *client,
  90                u8                 reg,
  91                u8                 value)
  92 {
  93         return i2c_smbus_write_byte_data(client, reg, value);
  94 }
  95
  96 static inline int
  97 adv7175_read (struct i2c_client *client,
  98               u8                 reg)
  99 {
 100         return i2c_smbus_read_byte_data(client, reg);
 101 }
 102
 103 static int
 104 adv7175_write_block (struct i2c_client *client,
 105                      const u8          *data,
 106                      unsigned int       len)
 107 {
 108         int ret = -1;
 109         u8 reg;
 110
 111         /* the adv7175 has an autoincrement function, use it if
 112          * the adapter understands raw I2C */
 113         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 114                 /* do raw I2C, not smbus compatible */
 115                 u8 block_data[32];
 116                 int block_len;
 117
 118                 while (len >= 2) {
 119                         block_len = 0;
 120                         block_data[block_len++] = reg = data[0];
 121                         do {
 122                                 block_data[block_len++] = data[1];
 123                                 reg++;
 124                                 len -= 2;
 125                                 data += 2;
 126                         } while (len >= 2 && data[0] == reg &&
 127                                  block_len < 32);
 128                         if ((ret = i2c_master_send(client, block_data,
 129                                                    block_len)) < 0)
 130                                 break;
 131                 }
 132         } else {
 133                 /* do some slow I2C emulation kind of thing */
 134                 while (len >= 2) {
 135                         reg = *data++;
 136                         if ((ret = adv7175_write(client, reg,
 137                                                  *data++)) < 0)
 138                                 break;
 139                         len -= 2;
 140                 }
 141         }
 142
 143         return ret;
 144 }
 145
 146 static void
 147 set_subcarrier_freq (struct i2c_client *client,
 148                      int                pass_through)
 149 {
 150         /* for some reason pass_through NTSC needs
 151          * a different sub-carrier freq to remain stable. */
 152         if(pass_through)
 153                 adv7175_write(client, 0x02, 0x00);
 154         else
 155                 adv7175_write(client, 0x02, 0x55);
 156
 157         adv7175_write(client, 0x03, 0x55);
 158         adv7175_write(client, 0x04, 0x55);
 159         adv7175_write(client, 0x05, 0x25);
 160 }
 161
 162 /* ----------------------------------------------------------------------- */
 163 // Output filter:  S-Video  Composite
 164
 165 #define MR050       0x11        //0x09
 166 #define MR060       0x14        //0x0c
 167
 168 //---------------------------------------------------------------------------
 169
 170 #define TR0MODE     0x46
 171 #define TR0RST      0x80
 172
 173 #define TR1CAPT     0x80
 174 #define TR1PLAY     0x00
 175
 176 static const unsigned char init_common[] = {
 177
 178         0x00, MR050,            /* MR0, PAL enabled */
 179         0x01, 0x00,             /* MR1 */
 180         0x02, 0x0c,             /* subc. freq. */
 181         0x03, 0x8c,             /* subc. freq. */
 182         0x04, 0x79,             /* subc. freq. */
 183         0x05, 0x26,             /* subc. freq. */
 184         0x06, 0x40,             /* subc. phase */
 185
 186         0x07, TR0MODE,          /* TR0, 16bit */
 187         0x08, 0x21,             /*  */
 188         0x09, 0x00,             /*  */
 189         0x0a, 0x00,             /*  */
 190         0x0b, 0x00,             /*  */
 191         0x0c, TR1CAPT,          /* TR1 */
 192         0x0d, 0x4f,             /* MR2 */
 193         0x0e, 0x00,             /*  */
 194         0x0f, 0x00,             /*  */
 195         0x10, 0x00,             /*  */
 196         0x11, 0x00,             /*  */
 197 };
 198
 199 static const unsigned char init_pal[] = {
 200         0x00, MR050,            /* MR0, PAL enabled */
 201         0x01, 0x00,             /* MR1 */
 202         0x02, 0x0c,             /* subc. freq. */
 203         0x03, 0x8c,             /* subc. freq. */
 204         0x04, 0x79,             /* subc. freq. */
 205         0x05, 0x26,             /* subc. freq. */
 206         0x06, 0x40,             /* subc. phase */
 207 };
 208
 209 static const unsigned char init_ntsc[] = {
 210         0x00, MR060,            /* MR0, NTSC enabled */
 211         0x01, 0x00,             /* MR1 */
 212         0x02, 0x55,             /* subc. freq. */
 213         0x03, 0x55,             /* subc. freq. */
 214         0x04, 0x55,             /* subc. freq. */
 215         0x05, 0x25,             /* subc. freq. */
 216         0x06, 0x1a,             /* subc. phase */
 217 };
 218
 219 static int
 220 adv7175_command (struct i2c_client *client,
 221                  unsigned int       cmd,
 222                  void              *arg)
 223 {
 224         struct adv7175 *encoder = i2c_get_clientdata(client);
 225
 226         switch (cmd) {
 227
 228         case 0:
 229                 /* This is just for testing!!! */
 230                 adv7175_write_block(client, init_common,
 231                                     sizeof(init_common));
 232                 adv7175_write(client, 0x07, TR0MODE | TR0RST);
 233                 adv7175_write(client, 0x07, TR0MODE);
 234                 break;
 235
 236         case ENCODER_GET_CAPABILITIES:
 237         {
 238                 struct video_encoder_capability *cap = arg;
 239
 240                 cap->flags = VIDEO_ENCODER_PAL |
 241                              VIDEO_ENCODER_NTSC |
 242                              VIDEO_ENCODER_SECAM; /* well, hacky */
 243                 cap->inputs = 2;
 244                 cap->outputs = 1;
 245         }
 246                 break;
 247
 248         case ENCODER_SET_NORM:
 249         {
 250                 int iarg = *(int *) arg;
 251
 252                 switch (iarg) {
 253
 254                 case VIDEO_MODE_NTSC:
 255                         adv7175_write_block(client, init_ntsc,
 256                                             sizeof(init_ntsc));
 257                         if (encoder->input == 0)
 258                                 adv7175_write(client, 0x0d, 0x4f);      // Enable genlock
 259                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
 260                         adv7175_write(client, 0x07, TR0MODE);
 261                         break;
 262
 263                 case VIDEO_MODE_PAL:
 264                         adv7175_write_block(client, init_pal,
 265                                             sizeof(init_pal));
 266                         if (encoder->input == 0)
 267                                 adv7175_write(client, 0x0d, 0x4f);      // Enable genlock
 268                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
 269                         adv7175_write(client, 0x07, TR0MODE);
 270                         break;
 271
 272                 case VIDEO_MODE_SECAM:  // WARNING! ADV7176 does not support SECAM.
 273                         /* This is an attempt to convert
 274                          * SECAM->PAL (typically it does not work
 275                          * due to genlock: when decoder is in SECAM
 276                          * and encoder in in PAL the subcarrier can
 277                          * not be syncronized with horizontal
 278                          * quency) */
 279                         adv7175_write_block(client, init_pal,
 280                                             sizeof(init_pal));
 281                         if (encoder->input == 0)
 282                                 adv7175_write(client, 0x0d, 0x49);      // Disable genlock
 283                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
 284                         adv7175_write(client, 0x07, TR0MODE);
 285                         break;
 286                 default:
 287                         dprintk(1, KERN_ERR "%s: illegal norm: %d\n",
 288                                 I2C_NAME(client), iarg);
 289                         return -EINVAL;
 290
 291                 }
 292                 dprintk(1, KERN_INFO "%s: switched to %s\n", I2C_NAME(client),
 293                         norms[iarg]);
 294                 encoder->norm = iarg;
 295         }
 296                 break;
 297
 298         case ENCODER_SET_INPUT:
 299         {
 300                 int iarg = *(int *) arg;
 301
 302                 /* RJ: *iarg = 0: input is from SAA7110
 303                  *iarg = 1: input is from ZR36060
 304                  *iarg = 2: color bar */
 305
 306                 switch (iarg) {
 307
 308                 case 0:
 309                         adv7175_write(client, 0x01, 0x00);
 310
 311                         if (encoder->norm == VIDEO_MODE_NTSC)
 312                                 set_subcarrier_freq(client, 1);
 313
 314                         adv7175_write(client, 0x0c, TR1CAPT);   /* TR1 */
 315                         if (encoder->norm == VIDEO_MODE_SECAM)
 316                                 adv7175_write(client, 0x0d, 0x49);      // Disable genlock
 317                         else
 318                                 adv7175_write(client, 0x0d, 0x4f);      // Enable genlock
 319                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
 320                         adv7175_write(client, 0x07, TR0MODE);
 321                         //udelay(10);
 322                         break;
 323
 324                 case 1:
 325                         adv7175_write(client, 0x01, 0x00);
 326
 327                         if (encoder->norm == VIDEO_MODE_NTSC)
 328                                 set_subcarrier_freq(client, 0);
 329
 330                         adv7175_write(client, 0x0c, TR1PLAY);   /* TR1 */
 331                         adv7175_write(client, 0x0d, 0x49);
 332                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
 333                         adv7175_write(client, 0x07, TR0MODE);
 334                         //udelay(10);
 335                         break;
 336
 337                 case 2:
 338                         adv7175_write(client, 0x01, 0x80);
 339
 340                         if (encoder->norm == VIDEO_MODE_NTSC)
 341                                 set_subcarrier_freq(client, 0);
 342
 343                         adv7175_write(client, 0x0d, 0x49);
 344                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
 345                         adv7175_write(client, 0x07, TR0MODE);
 346                         //udelay(10);
 347                         break;
 348
 349                 default:
 350                         dprintk(1, KERN_ERR "%s: illegal input: %d\n",
 351                                 I2C_NAME(client), iarg);
 352                         return -EINVAL;
 353
 354                 }
 355                 dprintk(1, KERN_INFO "%s: switched to %s\n", I2C_NAME(client),
 356                         inputs[iarg]);
 357                 encoder->input = iarg;
 358         }
 359                 break;
 360
 361         case ENCODER_SET_OUTPUT:
 362         {
 363                 int *iarg = arg;
 364
 365                 /* not much choice of outputs */
 366                 if (*iarg != 0) {
 367                         return -EINVAL;
 368                 }
 369         }
 370                 break;
 371
 372         case ENCODER_ENABLE_OUTPUT:
 373         {
 374                 int *iarg = arg;
 375
 376                 encoder->enable = !!*iarg;
 377         }
 378                 break;
 379
 380         default:
 381                 return -EINVAL;
 382         }
 383
 384         return 0;
 385 }
 386
 387 /* ----------------------------------------------------------------------- */
 388
 389 /*
 390  * Generic i2c probe
 391  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
 392  */
 393 static unsigned short normal_i2c[] =
 394     { I2C_ADV7175 >> 1, (I2C_ADV7175 >> 1) + 1,
 395         I2C_ADV7176 >> 1, (I2C_ADV7176 >> 1) + 1,
 396         I2C_CLIENT_END
 397 };
 398
 399 static unsigned short ignore = I2C_CLIENT_END;
 400
 401 static struct i2c_client_address_data addr_data = {
 402         .normal_i2c             = normal_i2c,
 403         .probe                  = &ignore,
 404         .ignore                 = &ignore,
 405 };
 406
 407 static struct i2c_driver i2c_driver_adv7175;
 408
 409 static int
 410 adv7175_detect_client (struct i2c_adapter *adapter,
 411                        int                 address,
 412                        int                 kind)
 413 {
 414         int i;
 415         struct i2c_client *client;
 416         struct adv7175 *encoder;
 417         char *dname;
 418
 419         dprintk(1,
 420                 KERN_INFO
 421                 "adv7175.c: detecting adv7175 client on address 0x%x\n",
 422                 address << 1);
 423
 424         /* Check if the adapter supports the needed features */
 425         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 426                 return 0;
 427
 428         client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
 429         if (!client)
 430                 return -ENOMEM;
 431         client->addr = address;
 432         client->adapter = adapter;
 433         client->driver = &i2c_driver_adv7175;
 434         if ((client->addr == I2C_ADV7175 >> 1) ||
 435             (client->addr == (I2C_ADV7175 >> 1) + 1)) {
 436                 dname = adv7175_name;
 437         } else if ((client->addr == I2C_ADV7176 >> 1) ||
 438                    (client->addr == (I2C_ADV7176 >> 1) + 1)) {
 439                 dname = adv7176_name;
 440         } else {
 441                 /* We should never get here!!! */
 442                 kfree(client);
 443                 return 0;
 444         }
 445         strlcpy(I2C_NAME(client), dname, sizeof(I2C_NAME(client)));
 446
 447         encoder = kzalloc(sizeof(struct adv7175), GFP_KERNEL);
 448         if (encoder == NULL) {
 449                 kfree(client);
 450                 return -ENOMEM;
 451         }
 452         encoder->norm = VIDEO_MODE_PAL;
 453         encoder->input = 0;
 454         encoder->enable = 1;
 455         i2c_set_clientdata(client, encoder);
 456
 457         i = i2c_attach_client(client);
 458         if (i) {
 459                 kfree(client);
 460                 kfree(encoder);
 461                 return i;
 462         }
 463
 464         i = adv7175_write_block(client, init_common, sizeof(init_common));
 465         if (i >= 0) {
 466                 i = adv7175_write(client, 0x07, TR0MODE | TR0RST);
 467                 i = adv7175_write(client, 0x07, TR0MODE);
 468                 i = adv7175_read(client, 0x12);
 469                 dprintk(1, KERN_INFO "%s_attach: rev. %d at 0x%x\n",
 470                         I2C_NAME(client), i & 1, client->addr << 1);
 471         }
 472         if (i < 0) {
 473                 dprintk(1, KERN_ERR "%s_attach: init error 0x%x\n",
 474                         I2C_NAME(client), i);
 475         }
 476
 477         return 0;
 478 }
 479
 480 static int
 481 adv7175_attach_adapter (struct i2c_adapter *adapter)
 482 {
 483         dprintk(1,
 484                 KERN_INFO
 485                 "adv7175.c: starting probe for adapter %s (0x%x)\n",
 486                 I2C_NAME(adapter), adapter->id);
 487         return i2c_probe(adapter, &addr_data, &adv7175_detect_client);
 488 }
 489
 490 static int
 491 adv7175_detach_client (struct i2c_client *client)
 492 {
 493         struct adv7175 *encoder = i2c_get_clientdata(client);
 494         int err;
 495
 496         err = i2c_detach_client(client);
 497         if (err) {
 498                 return err;
 499         }
 500
 501         kfree(encoder);
 502         kfree(client);
 503
 504         return 0;
 505 }
 506
 507 /* ----------------------------------------------------------------------- */
 508
 509 static struct i2c_driver i2c_driver_adv7175 = {
 510         .driver = {
 511                 .name = "adv7175",      /* name */
 512         },
 513
 514         .id = I2C_DRIVERID_ADV7175,
 515
 516         .attach_adapter = adv7175_attach_adapter,
 517         .detach_client = adv7175_detach_client,
 518         .command = adv7175_command,
 519 };
 520
 521 static int __init
 522 adv7175_init (void)
 523 {
 524         return i2c_add_driver(&i2c_driver_adv7175);
 525 }
 526
 527 static void __exit
 528 adv7175_exit (void)
 529 {
 530         i2c_del_driver(&i2c_driver_adv7175);
 531 }
 532
 533 module_init(adv7175_init);
 534 module_exit(adv7175_exit);