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   1 /*
   2  * adv7170 - adv7170, adv7171 video encoder driver version 0.0.1
   3  *
   4  * Copyright (C) 2002 Maxim Yevtyushkin <max@linuxmedialabs.com>
   5  *
   6  * Based on adv7176 driver by:
   7  *
   8  * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
   9  * Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net>
  10  * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
  11  *    - some corrections for Pinnacle Systems Inc. DC10plus card.
  12  *
  13  * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
  14  *    - moved over to linux>=2.4.x i2c protocol (1/1/2003)
  15  *
  16  * This program is free software; you can redistribute it and/or modify
  17  * it under the terms of the GNU General Public License as published by
  18  * the Free Software Foundation; either version 2 of the License, or
  19  * (at your option) any later version.
  20  *
  21  * This program is distributed in the hope that it will be useful,
  22  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  23  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24  * GNU General Public License for more details.
  25  *
  26  * You should have received a copy of the GNU General Public License
  27  * along with this program; if not, write to the Free Software
  28  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  29  */
  30
  31 #include <linux/module.h>
  32 #include <linux/init.h>
  33 #include <linux/delay.h>
  34 #include <linux/errno.h>
  35 #include <linux/fs.h>
  36 #include <linux/kernel.h>
  37 #include <linux/major.h>
  38 #include <linux/slab.h>
  39 #include <linux/mm.h>
  40 #include <linux/pci.h>
  41 #include <linux/signal.h>
  42 #include <asm/io.h>
  43 #include <asm/pgtable.h>
  44 #include <asm/page.h>
  45 #include <linux/types.h>
  46
  47 #include <linux/videodev.h>
  48 #include <asm/uaccess.h>
  49
  50 MODULE_DESCRIPTION("Analog Devices ADV7170 video encoder driver");
  51 MODULE_AUTHOR("Maxim Yevtyushkin");
  52 MODULE_LICENSE("GPL");
  53
  54 #include <linux/i2c.h>
  55
  56 #define I2C_NAME(x) (x)->name
  57
  58 #include <linux/video_encoder.h>
  59
  60 static int debug = 0;
  61 module_param(debug, int, 0);
  62 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  63
  64 #define dprintk(num, format, args...) \
  65         do { \
  66                 if (debug >= num) \
  67                         printk(format, ##args); \
  68         } while (0)
  69
  70 /* ----------------------------------------------------------------------- */
  71
  72 struct adv7170 {
  73         unsigned char reg[128];
  74
  75         int norm;
  76         int input;
  77         int enable;
  78         int bright;
  79         int contrast;
  80         int hue;
  81         int sat;
  82 };
  83
  84 #define   I2C_ADV7170        0xd4
  85 #define   I2C_ADV7171        0x54
  86
  87 static char adv7170_name[] = "adv7170";
  88 static char adv7171_name[] = "adv7171";
  89
  90 static char *inputs[] = { "pass_through", "play_back" };
  91 static char *norms[] = { "PAL", "NTSC" };
  92
  93 /* ----------------------------------------------------------------------- */
  94
  95 static inline int
  96 adv7170_write (struct i2c_client *client,
  97                u8                 reg,
  98                u8                 value)
  99 {
 100         struct adv7170 *encoder = i2c_get_clientdata(client);
 101
 102         encoder->reg[reg] = value;
 103         return i2c_smbus_write_byte_data(client, reg, value);
 104 }
 105
 106 static inline int
 107 adv7170_read (struct i2c_client *client,
 108               u8                 reg)
 109 {
 110         return i2c_smbus_read_byte_data(client, reg);
 111 }
 112
 113 static int
 114 adv7170_write_block (struct i2c_client *client,
 115                      const u8          *data,
 116                      unsigned int       len)
 117 {
 118         int ret = -1;
 119         u8 reg;
 120
 121         /* the adv7170 has an autoincrement function, use it if
 122          * the adapter understands raw I2C */
 123         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 124                 /* do raw I2C, not smbus compatible */
 125                 struct adv7170 *encoder = i2c_get_clientdata(client);
 126                 u8 block_data[32];
 127                 int block_len;
 128
 129                 while (len >= 2) {
 130                         block_len = 0;
 131                         block_data[block_len++] = reg = data[0];
 132                         do {
 133                                 block_data[block_len++] =
 134                                     encoder->reg[reg++] = data[1];
 135                                 len -= 2;
 136                                 data += 2;
 137                         } while (len >= 2 && data[0] == reg &&
 138                                  block_len < 32);
 139                         if ((ret = i2c_master_send(client, block_data,
 140                                                    block_len)) < 0)
 141                                 break;
 142                 }
 143         } else {
 144                 /* do some slow I2C emulation kind of thing */
 145                 while (len >= 2) {
 146                         reg = *data++;
 147                         if ((ret = adv7170_write(client, reg,
 148                                                  *data++)) < 0)
 149                                 break;
 150                         len -= 2;
 151                 }
 152         }
 153
 154         return ret;
 155 }
 156
 157 /* ----------------------------------------------------------------------- */
 158 // Output filter:  S-Video  Composite
 159
 160 #define MR050       0x11        //0x09
 161 #define MR060       0x14        //0x0c
 162
 163 //---------------------------------------------------------------------------
 164
 165 #define TR0MODE     0x4c
 166 #define TR0RST      0x80
 167
 168 #define TR1CAPT     0x00
 169 #define TR1PLAY     0x00
 170
 171
 172 static const unsigned char init_NTSC[] = {
 173         0x00, 0x10,             // MR0
 174         0x01, 0x20,             // MR1
 175         0x02, 0x0e,             // MR2 RTC control: bits 2 and 1
 176         0x03, 0x80,             // MR3
 177         0x04, 0x30,             // MR4
 178         0x05, 0x00,             // Reserved
 179         0x06, 0x00,             // Reserved
 180         0x07, TR0MODE,          // TM0
 181         0x08, TR1CAPT,          // TM1
 182         0x09, 0x16,             // Fsc0
 183         0x0a, 0x7c,             // Fsc1
 184         0x0b, 0xf0,             // Fsc2
 185         0x0c, 0x21,             // Fsc3
 186         0x0d, 0x00,             // Subcarrier Phase
 187         0x0e, 0x00,             // Closed Capt. Ext 0
 188         0x0f, 0x00,             // Closed Capt. Ext 1
 189         0x10, 0x00,             // Closed Capt. 0
 190         0x11, 0x00,             // Closed Capt. 1
 191         0x12, 0x00,             // Pedestal Ctl 0
 192         0x13, 0x00,             // Pedestal Ctl 1
 193         0x14, 0x00,             // Pedestal Ctl 2
 194         0x15, 0x00,             // Pedestal Ctl 3
 195         0x16, 0x00,             // CGMS_WSS_0
 196         0x17, 0x00,             // CGMS_WSS_1
 197         0x18, 0x00,             // CGMS_WSS_2
 198         0x19, 0x00,             // Teletext Ctl
 199 };
 200
 201 static const unsigned char init_PAL[] = {
 202         0x00, 0x71,             // MR0
 203         0x01, 0x20,             // MR1
 204         0x02, 0x0e,             // MR2 RTC control: bits 2 and 1
 205         0x03, 0x80,             // MR3
 206         0x04, 0x30,             // MR4
 207         0x05, 0x00,             // Reserved
 208         0x06, 0x00,             // Reserved
 209         0x07, TR0MODE,          // TM0
 210         0x08, TR1CAPT,          // TM1
 211         0x09, 0xcb,             // Fsc0
 212         0x0a, 0x8a,             // Fsc1
 213         0x0b, 0x09,             // Fsc2
 214         0x0c, 0x2a,             // Fsc3
 215         0x0d, 0x00,             // Subcarrier Phase
 216         0x0e, 0x00,             // Closed Capt. Ext 0
 217         0x0f, 0x00,             // Closed Capt. Ext 1
 218         0x10, 0x00,             // Closed Capt. 0
 219         0x11, 0x00,             // Closed Capt. 1
 220         0x12, 0x00,             // Pedestal Ctl 0
 221         0x13, 0x00,             // Pedestal Ctl 1
 222         0x14, 0x00,             // Pedestal Ctl 2
 223         0x15, 0x00,             // Pedestal Ctl 3
 224         0x16, 0x00,             // CGMS_WSS_0
 225         0x17, 0x00,             // CGMS_WSS_1
 226         0x18, 0x00,             // CGMS_WSS_2
 227         0x19, 0x00,             // Teletext Ctl
 228 };
 229
 230
 231 static int
 232 adv7170_command (struct i2c_client *client,
 233                  unsigned int       cmd,
 234                  void *             arg)
 235 {
 236         struct adv7170 *encoder = i2c_get_clientdata(client);
 237
 238         switch (cmd) {
 239
 240         case 0:
 241 #if 0
 242                 /* This is just for testing!!! */
 243                 adv7170_write_block(client, init_common,
 244                                     sizeof(init_common));
 245                 adv7170_write(client, 0x07, TR0MODE | TR0RST);
 246                 adv7170_write(client, 0x07, TR0MODE);
 247 #endif
 248                 break;
 249
 250         case ENCODER_GET_CAPABILITIES:
 251         {
 252                 struct video_encoder_capability *cap = arg;
 253
 254                 cap->flags = VIDEO_ENCODER_PAL |
 255                              VIDEO_ENCODER_NTSC;
 256                 cap->inputs = 2;
 257                 cap->outputs = 1;
 258         }
 259                 break;
 260
 261         case ENCODER_SET_NORM:
 262         {
 263                 int iarg = *(int *) arg;
 264
 265                 dprintk(1, KERN_DEBUG "%s_command: set norm %d",
 266                         I2C_NAME(client), iarg);
 267
 268                 switch (iarg) {
 269
 270                 case VIDEO_MODE_NTSC:
 271                         adv7170_write_block(client, init_NTSC,
 272                                             sizeof(init_NTSC));
 273                         if (encoder->input == 0)
 274                                 adv7170_write(client, 0x02, 0x0e);      // Enable genlock
 275                         adv7170_write(client, 0x07, TR0MODE | TR0RST);
 276                         adv7170_write(client, 0x07, TR0MODE);
 277                         break;
 278
 279                 case VIDEO_MODE_PAL:
 280                         adv7170_write_block(client, init_PAL,
 281                                             sizeof(init_PAL));
 282                         if (encoder->input == 0)
 283                                 adv7170_write(client, 0x02, 0x0e);      // Enable genlock
 284                         adv7170_write(client, 0x07, TR0MODE | TR0RST);
 285                         adv7170_write(client, 0x07, TR0MODE);
 286                         break;
 287
 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_DEBUG "%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 decoder
 305                  *iarg = 1: input is from ZR36060
 306                  *iarg = 2: color bar */
 307
 308                 dprintk(1, KERN_DEBUG "%s_command: set input from %s\n",
 309                         I2C_NAME(client),
 310                         iarg == 0 ? "decoder" : "ZR36060");
 311
 312                 switch (iarg) {
 313
 314                 case 0:
 315                         adv7170_write(client, 0x01, 0x20);
 316                         adv7170_write(client, 0x08, TR1CAPT);   /* TR1 */
 317                         adv7170_write(client, 0x02, 0x0e);      // Enable genlock
 318                         adv7170_write(client, 0x07, TR0MODE | TR0RST);
 319                         adv7170_write(client, 0x07, TR0MODE);
 320                         //udelay(10);
 321                         break;
 322
 323                 case 1:
 324                         adv7170_write(client, 0x01, 0x00);
 325                         adv7170_write(client, 0x08, TR1PLAY);   /* TR1 */
 326                         adv7170_write(client, 0x02, 0x08);
 327                         adv7170_write(client, 0x07, TR0MODE | TR0RST);
 328                         adv7170_write(client, 0x07, TR0MODE);
 329                         //udelay(10);
 330                         break;
 331
 332                 default:
 333                         dprintk(1, KERN_ERR "%s: illegal input: %d\n",
 334                                 I2C_NAME(client), iarg);
 335                         return -EINVAL;
 336
 337                 }
 338                 dprintk(1, KERN_DEBUG "%s: switched to %s\n", I2C_NAME(client),
 339                         inputs[iarg]);
 340                 encoder->input = iarg;
 341         }
 342                 break;
 343
 344         case ENCODER_SET_OUTPUT:
 345         {
 346                 int *iarg = arg;
 347
 348                 /* not much choice of outputs */
 349                 if (*iarg != 0) {
 350                         return -EINVAL;
 351                 }
 352         }
 353                 break;
 354
 355         case ENCODER_ENABLE_OUTPUT:
 356         {
 357                 int *iarg = arg;
 358
 359                 encoder->enable = !!*iarg;
 360         }
 361                 break;
 362
 363         default:
 364                 return -EINVAL;
 365         }
 366
 367         return 0;
 368 }
 369
 370 /* ----------------------------------------------------------------------- */
 371
 372 /*
 373  * Generic i2c probe
 374  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
 375  */
 376 static unsigned short normal_i2c[] =
 377     { I2C_ADV7170 >> 1, (I2C_ADV7170 >> 1) + 1,
 378         I2C_ADV7171 >> 1, (I2C_ADV7171 >> 1) + 1,
 379         I2C_CLIENT_END
 380 };
 381
 382 static unsigned short ignore = I2C_CLIENT_END;
 383
 384 static struct i2c_client_address_data addr_data = {
 385         .normal_i2c             = normal_i2c,
 386         .probe                  = &ignore,
 387         .ignore                 = &ignore,
 388 };
 389
 390 static struct i2c_driver i2c_driver_adv7170;
 391
 392 static int
 393 adv7170_detect_client (struct i2c_adapter *adapter,
 394                        int                 address,
 395                        int                 kind)
 396 {
 397         int i;
 398         struct i2c_client *client;
 399         struct adv7170 *encoder;
 400         char *dname;
 401
 402         dprintk(1,
 403                 KERN_INFO
 404                 "adv7170.c: detecting adv7170 client on address 0x%x\n",
 405                 address << 1);
 406
 407         /* Check if the adapter supports the needed features */
 408         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 409                 return 0;
 410
 411         client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
 412         if (client == 0)
 413                 return -ENOMEM;
 414         client->addr = address;
 415         client->adapter = adapter;
 416         client->driver = &i2c_driver_adv7170;
 417         if ((client->addr == I2C_ADV7170 >> 1) ||
 418             (client->addr == (I2C_ADV7170 >> 1) + 1)) {
 419                 dname = adv7170_name;
 420         } else if ((client->addr == I2C_ADV7171 >> 1) ||
 421                    (client->addr == (I2C_ADV7171 >> 1) + 1)) {
 422                 dname = adv7171_name;
 423         } else {
 424                 /* We should never get here!!! */
 425                 kfree(client);
 426                 return 0;
 427         }
 428         strlcpy(I2C_NAME(client), dname, sizeof(I2C_NAME(client)));
 429
 430         encoder = kzalloc(sizeof(struct adv7170), GFP_KERNEL);
 431         if (encoder == NULL) {
 432                 kfree(client);
 433                 return -ENOMEM;
 434         }
 435         encoder->norm = VIDEO_MODE_NTSC;
 436         encoder->input = 0;
 437         encoder->enable = 1;
 438         i2c_set_clientdata(client, encoder);
 439
 440         i = i2c_attach_client(client);
 441         if (i) {
 442                 kfree(client);
 443                 kfree(encoder);
 444                 return i;
 445         }
 446
 447         i = adv7170_write_block(client, init_NTSC, sizeof(init_NTSC));
 448         if (i >= 0) {
 449                 i = adv7170_write(client, 0x07, TR0MODE | TR0RST);
 450                 i = adv7170_write(client, 0x07, TR0MODE);
 451                 i = adv7170_read(client, 0x12);
 452                 dprintk(1, KERN_INFO "%s_attach: rev. %d at 0x%02x\n",
 453                         I2C_NAME(client), i & 1, client->addr << 1);
 454         }
 455         if (i < 0) {
 456                 dprintk(1, KERN_ERR "%s_attach: init error 0x%x\n",
 457                        I2C_NAME(client), i);
 458         }
 459
 460         return 0;
 461 }
 462
 463 static int
 464 adv7170_attach_adapter (struct i2c_adapter *adapter)
 465 {
 466         dprintk(1,
 467                 KERN_INFO
 468                 "adv7170.c: starting probe for adapter %s (0x%x)\n",
 469                 I2C_NAME(adapter), adapter->id);
 470         return i2c_probe(adapter, &addr_data, &adv7170_detect_client);
 471 }
 472
 473 static int
 474 adv7170_detach_client (struct i2c_client *client)
 475 {
 476         struct adv7170 *encoder = i2c_get_clientdata(client);
 477         int err;
 478
 479         err = i2c_detach_client(client);
 480         if (err) {
 481                 return err;
 482         }
 483
 484         kfree(encoder);
 485         kfree(client);
 486
 487         return 0;
 488 }
 489
 490 /* ----------------------------------------------------------------------- */
 491
 492 static struct i2c_driver i2c_driver_adv7170 = {
 493         .driver = {
 494                 .name = "adv7170",      /* name */
 495         },
 496
 497         .id = I2C_DRIVERID_ADV7170,
 498
 499         .attach_adapter = adv7170_attach_adapter,
 500         .detach_client = adv7170_detach_client,
 501         .command = adv7170_command,
 502 };
 503
 504 static int __init
 505 adv7170_init (void)
 506 {
 507         return i2c_add_driver(&i2c_driver_adv7170);
 508 }
 509
 510 static void __exit
 511 adv7170_exit (void)
 512 {
 513         i2c_del_driver(&i2c_driver_adv7170);
 514 }
 515
 516 module_init(adv7170_init);
 517 module_exit(adv7170_exit);