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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/sched.h>
  46 #include <linux/types.h>
  47
  48 #include <linux/videodev.h>
  49 #include <asm/uaccess.h>
  50
  51 MODULE_DESCRIPTION("Analog Devices ADV7170 video encoder driver");
  52 MODULE_AUTHOR("Maxim Yevtyushkin");
  53 MODULE_LICENSE("GPL");
  54
  55 #include <linux/i2c.h>
  56 #include <linux/i2c-dev.h>
  57
  58 #define I2C_NAME(x) (x)->name
  59
  60 #include <linux/video_encoder.h>
  61
  62 static int debug = 0;
  63 module_param(debug, int, 0);
  64 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  65
  66 #define dprintk(num, format, args...) \
  67         do { \
  68                 if (debug >= num) \
  69                         printk(format, ##args); \
  70         } while (0)
  71
  72 /* ----------------------------------------------------------------------- */
  73
  74 struct adv7170 {
  75         unsigned char reg[128];
  76
  77         int norm;
  78         int input;
  79         int enable;
  80         int bright;
  81         int contrast;
  82         int hue;
  83         int sat;
  84 };
  85
  86 #define   I2C_ADV7170        0xd4
  87 #define   I2C_ADV7171        0x54
  88
  89 static char adv7170_name[] = "adv7170";
  90 static char adv7171_name[] = "adv7171";
  91
  92 static char *inputs[] = { "pass_through", "play_back" };
  93 static char *norms[] = { "PAL", "NTSC" };
  94
  95 /* ----------------------------------------------------------------------- */
  96
  97 static inline int
  98 adv7170_write (struct i2c_client *client,
  99                u8                 reg,
 100                u8                 value)
 101 {
 102         struct adv7170 *encoder = i2c_get_clientdata(client);
 103
 104         encoder->reg[reg] = value;
 105         return i2c_smbus_write_byte_data(client, reg, value);
 106 }
 107
 108 static inline int
 109 adv7170_read (struct i2c_client *client,
 110               u8                 reg)
 111 {
 112         return i2c_smbus_read_byte_data(client, reg);
 113 }
 114
 115 static int
 116 adv7170_write_block (struct i2c_client *client,
 117                      const u8          *data,
 118                      unsigned int       len)
 119 {
 120         int ret = -1;
 121         u8 reg;
 122
 123         /* the adv7170 has an autoincrement function, use it if
 124          * the adapter understands raw I2C */
 125         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 126                 /* do raw I2C, not smbus compatible */
 127                 struct adv7170 *encoder = i2c_get_clientdata(client);
 128                 u8 block_data[32];
 129                 int block_len;
 130
 131                 while (len >= 2) {
 132                         block_len = 0;
 133                         block_data[block_len++] = reg = data[0];
 134                         do {
 135                                 block_data[block_len++] =
 136                                     encoder->reg[reg++] = data[1];
 137                                 len -= 2;
 138                                 data += 2;
 139                         } while (len >= 2 && data[0] == reg &&
 140                                  block_len < 32);
 141                         if ((ret = i2c_master_send(client, block_data,
 142                                                    block_len)) < 0)
 143                                 break;
 144                 }
 145         } else {
 146                 /* do some slow I2C emulation kind of thing */
 147                 while (len >= 2) {
 148                         reg = *data++;
 149                         if ((ret = adv7170_write(client, reg,
 150                                                  *data++)) < 0)
 151                                 break;
 152                         len -= 2;
 153                 }
 154         }
 155
 156         return ret;
 157 }
 158
 159 /* ----------------------------------------------------------------------- */
 160 // Output filter:  S-Video  Composite
 161
 162 #define MR050       0x11        //0x09
 163 #define MR060       0x14        //0x0c
 164
 165 //---------------------------------------------------------------------------
 166
 167 #define TR0MODE     0x4c
 168 #define TR0RST      0x80
 169
 170 #define TR1CAPT     0x00
 171 #define TR1PLAY     0x00
 172
 173
 174 static const unsigned char init_NTSC[] = {
 175         0x00, 0x10,             // MR0
 176         0x01, 0x20,             // MR1
 177         0x02, 0x0e,             // MR2 RTC control: bits 2 and 1
 178         0x03, 0x80,             // MR3
 179         0x04, 0x30,             // MR4
 180         0x05, 0x00,             // Reserved
 181         0x06, 0x00,             // Reserved
 182         0x07, TR0MODE,          // TM0
 183         0x08, TR1CAPT,          // TM1
 184         0x09, 0x16,             // Fsc0
 185         0x0a, 0x7c,             // Fsc1
 186         0x0b, 0xf0,             // Fsc2
 187         0x0c, 0x21,             // Fsc3
 188         0x0d, 0x00,             // Subcarrier Phase
 189         0x0e, 0x00,             // Closed Capt. Ext 0
 190         0x0f, 0x00,             // Closed Capt. Ext 1
 191         0x10, 0x00,             // Closed Capt. 0
 192         0x11, 0x00,             // Closed Capt. 1
 193         0x12, 0x00,             // Pedestal Ctl 0
 194         0x13, 0x00,             // Pedestal Ctl 1
 195         0x14, 0x00,             // Pedestal Ctl 2
 196         0x15, 0x00,             // Pedestal Ctl 3
 197         0x16, 0x00,             // CGMS_WSS_0
 198         0x17, 0x00,             // CGMS_WSS_1
 199         0x18, 0x00,             // CGMS_WSS_2
 200         0x19, 0x00,             // Teletext Ctl
 201 };
 202
 203 static const unsigned char init_PAL[] = {
 204         0x00, 0x71,             // MR0
 205         0x01, 0x20,             // MR1
 206         0x02, 0x0e,             // MR2 RTC control: bits 2 and 1
 207         0x03, 0x80,             // MR3
 208         0x04, 0x30,             // MR4
 209         0x05, 0x00,             // Reserved
 210         0x06, 0x00,             // Reserved
 211         0x07, TR0MODE,          // TM0
 212         0x08, TR1CAPT,          // TM1
 213         0x09, 0xcb,             // Fsc0
 214         0x0a, 0x8a,             // Fsc1
 215         0x0b, 0x09,             // Fsc2
 216         0x0c, 0x2a,             // Fsc3
 217         0x0d, 0x00,             // Subcarrier Phase
 218         0x0e, 0x00,             // Closed Capt. Ext 0
 219         0x0f, 0x00,             // Closed Capt. Ext 1
 220         0x10, 0x00,             // Closed Capt. 0
 221         0x11, 0x00,             // Closed Capt. 1
 222         0x12, 0x00,             // Pedestal Ctl 0
 223         0x13, 0x00,             // Pedestal Ctl 1
 224         0x14, 0x00,             // Pedestal Ctl 2
 225         0x15, 0x00,             // Pedestal Ctl 3
 226         0x16, 0x00,             // CGMS_WSS_0
 227         0x17, 0x00,             // CGMS_WSS_1
 228         0x18, 0x00,             // CGMS_WSS_2
 229         0x19, 0x00,             // Teletext Ctl
 230 };
 231
 232
 233 static int
 234 adv7170_command (struct i2c_client *client,
 235                  unsigned int       cmd,
 236                  void *             arg)
 237 {
 238         struct adv7170 *encoder = i2c_get_clientdata(client);
 239
 240         switch (cmd) {
 241
 242         case 0:
 243 #if 0
 244                 /* This is just for testing!!! */
 245                 adv7170_write_block(client, init_common,
 246                                     sizeof(init_common));
 247                 adv7170_write(client, 0x07, TR0MODE | TR0RST);
 248                 adv7170_write(client, 0x07, TR0MODE);
 249 #endif
 250                 break;
 251
 252         case ENCODER_GET_CAPABILITIES:
 253         {
 254                 struct video_encoder_capability *cap = arg;
 255
 256                 cap->flags = VIDEO_ENCODER_PAL |
 257                              VIDEO_ENCODER_NTSC;
 258                 cap->inputs = 2;
 259                 cap->outputs = 1;
 260         }
 261                 break;
 262
 263         case ENCODER_SET_NORM:
 264         {
 265                 int iarg = *(int *) arg;
 266
 267                 dprintk(1, KERN_DEBUG "%s_command: set norm %d",
 268                         I2C_NAME(client), iarg);
 269
 270                 switch (iarg) {
 271
 272                 case VIDEO_MODE_NTSC:
 273                         adv7170_write_block(client, init_NTSC,
 274                                             sizeof(init_NTSC));
 275                         if (encoder->input == 0)
 276                                 adv7170_write(client, 0x02, 0x0e);      // Enable genlock
 277                         adv7170_write(client, 0x07, TR0MODE | TR0RST);
 278                         adv7170_write(client, 0x07, TR0MODE);
 279                         break;
 280
 281                 case VIDEO_MODE_PAL:
 282                         adv7170_write_block(client, init_PAL,
 283                                             sizeof(init_PAL));
 284                         if (encoder->input == 0)
 285                                 adv7170_write(client, 0x02, 0x0e);      // Enable genlock
 286                         adv7170_write(client, 0x07, TR0MODE | TR0RST);
 287                         adv7170_write(client, 0x07, TR0MODE);
 288                         break;
 289
 290                 default:
 291                         dprintk(1, KERN_ERR "%s: illegal norm: %d\n",
 292                                I2C_NAME(client), iarg);
 293                         return -EINVAL;
 294
 295                 }
 296                 dprintk(1, KERN_DEBUG "%s: switched to %s\n", I2C_NAME(client),
 297                         norms[iarg]);
 298                 encoder->norm = iarg;
 299         }
 300                 break;
 301
 302         case ENCODER_SET_INPUT:
 303         {
 304                 int iarg = *(int *) arg;
 305
 306                 /* RJ: *iarg = 0: input is from decoder
 307                  *iarg = 1: input is from ZR36060
 308                  *iarg = 2: color bar */
 309
 310                 dprintk(1, KERN_DEBUG "%s_command: set input from %s\n",
 311                         I2C_NAME(client),
 312                         iarg == 0 ? "decoder" : "ZR36060");
 313
 314                 switch (iarg) {
 315
 316                 case 0:
 317                         adv7170_write(client, 0x01, 0x20);
 318                         adv7170_write(client, 0x08, TR1CAPT);   /* TR1 */
 319                         adv7170_write(client, 0x02, 0x0e);      // Enable genlock
 320                         adv7170_write(client, 0x07, TR0MODE | TR0RST);
 321                         adv7170_write(client, 0x07, TR0MODE);
 322                         //udelay(10);
 323                         break;
 324
 325                 case 1:
 326                         adv7170_write(client, 0x01, 0x00);
 327                         adv7170_write(client, 0x08, TR1PLAY);   /* TR1 */
 328                         adv7170_write(client, 0x02, 0x08);
 329                         adv7170_write(client, 0x07, TR0MODE | TR0RST);
 330                         adv7170_write(client, 0x07, TR0MODE);
 331                         //udelay(10);
 332                         break;
 333
 334                 default:
 335                         dprintk(1, KERN_ERR "%s: illegal input: %d\n",
 336                                 I2C_NAME(client), iarg);
 337                         return -EINVAL;
 338
 339                 }
 340                 dprintk(1, KERN_DEBUG "%s: switched to %s\n", I2C_NAME(client),
 341                         inputs[iarg]);
 342                 encoder->input = iarg;
 343         }
 344                 break;
 345
 346         case ENCODER_SET_OUTPUT:
 347         {
 348                 int *iarg = arg;
 349
 350                 /* not much choice of outputs */
 351                 if (*iarg != 0) {
 352                         return -EINVAL;
 353                 }
 354         }
 355                 break;
 356
 357         case ENCODER_ENABLE_OUTPUT:
 358         {
 359                 int *iarg = arg;
 360
 361                 encoder->enable = !!*iarg;
 362         }
 363                 break;
 364
 365         default:
 366                 return -EINVAL;
 367         }
 368
 369         return 0;
 370 }
 371
 372 /* ----------------------------------------------------------------------- */
 373
 374 /*
 375  * Generic i2c probe
 376  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
 377  */
 378 static unsigned short normal_i2c[] =
 379     { I2C_ADV7170 >> 1, (I2C_ADV7170 >> 1) + 1,
 380         I2C_ADV7171 >> 1, (I2C_ADV7171 >> 1) + 1,
 381         I2C_CLIENT_END
 382 };
 383
 384 static unsigned short ignore = I2C_CLIENT_END;
 385
 386 static struct i2c_client_address_data addr_data = {
 387         .normal_i2c             = normal_i2c,
 388         .probe                  = &ignore,
 389         .ignore                 = &ignore,
 390 };
 391
 392 static struct i2c_driver i2c_driver_adv7170;
 393
 394 static int
 395 adv7170_detect_client (struct i2c_adapter *adapter,
 396                        int                 address,
 397                        int                 kind)
 398 {
 399         int i;
 400         struct i2c_client *client;
 401         struct adv7170 *encoder;
 402         char *dname;
 403
 404         dprintk(1,
 405                 KERN_INFO
 406                 "adv7170.c: detecting adv7170 client on address 0x%x\n",
 407                 address << 1);
 408
 409         /* Check if the adapter supports the needed features */
 410         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 411                 return 0;
 412
 413         client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
 414         if (client == 0)
 415                 return -ENOMEM;
 416         client->addr = address;
 417         client->adapter = adapter;
 418         client->driver = &i2c_driver_adv7170;
 419         if ((client->addr == I2C_ADV7170 >> 1) ||
 420             (client->addr == (I2C_ADV7170 >> 1) + 1)) {
 421                 dname = adv7170_name;
 422         } else if ((client->addr == I2C_ADV7171 >> 1) ||
 423                    (client->addr == (I2C_ADV7171 >> 1) + 1)) {
 424                 dname = adv7171_name;
 425         } else {
 426                 /* We should never get here!!! */
 427                 kfree(client);
 428                 return 0;
 429         }
 430         strlcpy(I2C_NAME(client), dname, sizeof(I2C_NAME(client)));
 431
 432         encoder = kzalloc(sizeof(struct adv7170), GFP_KERNEL);
 433         if (encoder == NULL) {
 434                 kfree(client);
 435                 return -ENOMEM;
 436         }
 437         encoder->norm = VIDEO_MODE_NTSC;
 438         encoder->input = 0;
 439         encoder->enable = 1;
 440         i2c_set_clientdata(client, encoder);
 441
 442         i = i2c_attach_client(client);
 443         if (i) {
 444                 kfree(client);
 445                 kfree(encoder);
 446                 return i;
 447         }
 448
 449         i = adv7170_write_block(client, init_NTSC, sizeof(init_NTSC));
 450         if (i >= 0) {
 451                 i = adv7170_write(client, 0x07, TR0MODE | TR0RST);
 452                 i = adv7170_write(client, 0x07, TR0MODE);
 453                 i = adv7170_read(client, 0x12);
 454                 dprintk(1, KERN_INFO "%s_attach: rev. %d at 0x%02x\n",
 455                         I2C_NAME(client), i & 1, client->addr << 1);
 456         }
 457         if (i < 0) {
 458                 dprintk(1, KERN_ERR "%s_attach: init error 0x%x\n",
 459                        I2C_NAME(client), i);
 460         }
 461
 462         return 0;
 463 }
 464
 465 static int
 466 adv7170_attach_adapter (struct i2c_adapter *adapter)
 467 {
 468         dprintk(1,
 469                 KERN_INFO
 470                 "adv7170.c: starting probe for adapter %s (0x%x)\n",
 471                 I2C_NAME(adapter), adapter->id);
 472         return i2c_probe(adapter, &addr_data, &adv7170_detect_client);
 473 }
 474
 475 static int
 476 adv7170_detach_client (struct i2c_client *client)
 477 {
 478         struct adv7170 *encoder = i2c_get_clientdata(client);
 479         int err;
 480
 481         err = i2c_detach_client(client);
 482         if (err) {
 483                 return err;
 484         }
 485
 486         kfree(encoder);
 487         kfree(client);
 488
 489         return 0;
 490 }
 491
 492 /* ----------------------------------------------------------------------- */
 493
 494 static struct i2c_driver i2c_driver_adv7170 = {
 495         .driver = {
 496                 .name = "adv7170",      /* name */
 497         },
 498
 499         .id = I2C_DRIVERID_ADV7170,
 500
 501         .attach_adapter = adv7170_attach_adapter,
 502         .detach_client = adv7170_detach_client,
 503         .command = adv7170_command,
 504 };
 505
 506 static int __init
 507 adv7170_init (void)
 508 {
 509         return i2c_add_driver(&i2c_driver_adv7170);
 510 }
 511
 512 static void __exit
 513 adv7170_exit (void)
 514 {
 515         i2c_del_driver(&i2c_driver_adv7170);
 516 }
 517
 518 module_init(adv7170_init);
 519 module_exit(adv7170_exit);