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