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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                 struct i2c_msg msg;
 129                 u8 block_data[32];
 130
 131                 msg.addr = client->addr;
 132                 msg.flags = 0;
 133                 while (len >= 2) {
 134                         msg.buf = (char *) block_data;
 135                         msg.len = 0;
 136                         block_data[msg.len++] = reg = data[0];
 137                         do {
 138                                 block_data[msg.len++] =
 139                                     encoder->reg[reg++] = data[1];
 140                                 len -= 2;
 141                                 data += 2;
 142                         } while (len >= 2 && data[0] == reg &&
 143                                  msg.len < 32);
 144                         if ((ret = i2c_transfer(client->adapter,
 145                                                 &msg, 1)) < 0)
 146                                 break;
 147                 }
 148         } else {
 149                 /* do some slow I2C emulation kind of thing */
 150                 while (len >= 2) {
 151                         reg = *data++;
 152                         if ((ret = adv7170_write(client, reg,
 153                                                  *data++)) < 0)
 154                                 break;
 155                         len -= 2;
 156                 }
 157         }
 158
 159         return ret;
 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     0x4c
 171 #define TR0RST      0x80
 172
 173 #define TR1CAPT     0x00
 174 #define TR1PLAY     0x00
 175
 176
 177 static const unsigned char init_NTSC[] = {
 178         0x00, 0x10,             // MR0
 179         0x01, 0x20,             // MR1
 180         0x02, 0x0e,             // MR2 RTC control: bits 2 and 1
 181         0x03, 0x80,             // MR3
 182         0x04, 0x30,             // MR4
 183         0x05, 0x00,             // Reserved
 184         0x06, 0x00,             // Reserved
 185         0x07, TR0MODE,          // TM0
 186         0x08, TR1CAPT,          // TM1
 187         0x09, 0x16,             // Fsc0
 188         0x0a, 0x7c,             // Fsc1
 189         0x0b, 0xf0,             // Fsc2
 190         0x0c, 0x21,             // Fsc3
 191         0x0d, 0x00,             // Subcarrier Phase
 192         0x0e, 0x00,             // Closed Capt. Ext 0
 193         0x0f, 0x00,             // Closed Capt. Ext 1
 194         0x10, 0x00,             // Closed Capt. 0
 195         0x11, 0x00,             // Closed Capt. 1
 196         0x12, 0x00,             // Pedestal Ctl 0
 197         0x13, 0x00,             // Pedestal Ctl 1
 198         0x14, 0x00,             // Pedestal Ctl 2
 199         0x15, 0x00,             // Pedestal Ctl 3
 200         0x16, 0x00,             // CGMS_WSS_0
 201         0x17, 0x00,             // CGMS_WSS_1
 202         0x18, 0x00,             // CGMS_WSS_2
 203         0x19, 0x00,             // Teletext Ctl
 204 };
 205
 206 static const unsigned char init_PAL[] = {
 207         0x00, 0x71,             // MR0
 208         0x01, 0x20,             // MR1
 209         0x02, 0x0e,             // MR2 RTC control: bits 2 and 1
 210         0x03, 0x80,             // MR3
 211         0x04, 0x30,             // MR4
 212         0x05, 0x00,             // Reserved
 213         0x06, 0x00,             // Reserved
 214         0x07, TR0MODE,          // TM0
 215         0x08, TR1CAPT,          // TM1
 216         0x09, 0xcb,             // Fsc0
 217         0x0a, 0x8a,             // Fsc1
 218         0x0b, 0x09,             // Fsc2
 219         0x0c, 0x2a,             // Fsc3
 220         0x0d, 0x00,             // Subcarrier Phase
 221         0x0e, 0x00,             // Closed Capt. Ext 0
 222         0x0f, 0x00,             // Closed Capt. Ext 1
 223         0x10, 0x00,             // Closed Capt. 0
 224         0x11, 0x00,             // Closed Capt. 1
 225         0x12, 0x00,             // Pedestal Ctl 0
 226         0x13, 0x00,             // Pedestal Ctl 1
 227         0x14, 0x00,             // Pedestal Ctl 2
 228         0x15, 0x00,             // Pedestal Ctl 3
 229         0x16, 0x00,             // CGMS_WSS_0
 230         0x17, 0x00,             // CGMS_WSS_1
 231         0x18, 0x00,             // CGMS_WSS_2
 232         0x19, 0x00,             // Teletext Ctl
 233 };
 234
 235
 236 static int
 237 adv7170_command (struct i2c_client *client,
 238                  unsigned int       cmd,
 239                  void *             arg)
 240 {
 241         struct adv7170 *encoder = i2c_get_clientdata(client);
 242
 243         switch (cmd) {
 244
 245         case 0:
 246 #if 0
 247                 /* This is just for testing!!! */
 248                 adv7170_write_block(client, init_common,
 249                                     sizeof(init_common));
 250                 adv7170_write(client, 0x07, TR0MODE | TR0RST);
 251                 adv7170_write(client, 0x07, TR0MODE);
 252 #endif
 253                 break;
 254
 255         case ENCODER_GET_CAPABILITIES:
 256         {
 257                 struct video_encoder_capability *cap = arg;
 258
 259                 cap->flags = VIDEO_ENCODER_PAL |
 260                              VIDEO_ENCODER_NTSC;
 261                 cap->inputs = 2;
 262                 cap->outputs = 1;
 263         }
 264                 break;
 265
 266         case ENCODER_SET_NORM:
 267         {
 268                 int iarg = *(int *) arg;
 269
 270                 dprintk(1, KERN_DEBUG "%s_command: set norm %d",
 271                         I2C_NAME(client), iarg);
 272
 273                 switch (iarg) {
 274
 275                 case VIDEO_MODE_NTSC:
 276                         adv7170_write_block(client, init_NTSC,
 277                                             sizeof(init_NTSC));
 278                         if (encoder->input == 0)
 279                                 adv7170_write(client, 0x02, 0x0e);      // Enable genlock
 280                         adv7170_write(client, 0x07, TR0MODE | TR0RST);
 281                         adv7170_write(client, 0x07, TR0MODE);
 282                         break;
 283
 284                 case VIDEO_MODE_PAL:
 285                         adv7170_write_block(client, init_PAL,
 286                                             sizeof(init_PAL));
 287                         if (encoder->input == 0)
 288                                 adv7170_write(client, 0x02, 0x0e);      // Enable genlock
 289                         adv7170_write(client, 0x07, TR0MODE | TR0RST);
 290                         adv7170_write(client, 0x07, TR0MODE);
 291                         break;
 292
 293                 default:
 294                         dprintk(1, KERN_ERR "%s: illegal norm: %d\n",
 295                                I2C_NAME(client), iarg);
 296                         return -EINVAL;
 297
 298                 }
 299                 dprintk(1, KERN_DEBUG "%s: switched to %s\n", I2C_NAME(client),
 300                         norms[iarg]);
 301                 encoder->norm = iarg;
 302         }
 303                 break;
 304
 305         case ENCODER_SET_INPUT:
 306         {
 307                 int iarg = *(int *) arg;
 308
 309                 /* RJ: *iarg = 0: input is from decoder
 310                  *iarg = 1: input is from ZR36060
 311                  *iarg = 2: color bar */
 312
 313                 dprintk(1, KERN_DEBUG "%s_command: set input from %s\n",
 314                         I2C_NAME(client),
 315                         iarg == 0 ? "decoder" : "ZR36060");
 316
 317                 switch (iarg) {
 318
 319                 case 0:
 320                         adv7170_write(client, 0x01, 0x20);
 321                         adv7170_write(client, 0x08, TR1CAPT);   /* TR1 */
 322                         adv7170_write(client, 0x02, 0x0e);      // Enable genlock
 323                         adv7170_write(client, 0x07, TR0MODE | TR0RST);
 324                         adv7170_write(client, 0x07, TR0MODE);
 325                         //udelay(10);
 326                         break;
 327
 328                 case 1:
 329                         adv7170_write(client, 0x01, 0x00);
 330                         adv7170_write(client, 0x08, TR1PLAY);   /* TR1 */
 331                         adv7170_write(client, 0x02, 0x08);
 332                         adv7170_write(client, 0x07, TR0MODE | TR0RST);
 333                         adv7170_write(client, 0x07, TR0MODE);
 334                         //udelay(10);
 335                         break;
 336
 337                 default:
 338                         dprintk(1, KERN_ERR "%s: illegal input: %d\n",
 339                                 I2C_NAME(client), iarg);
 340                         return -EINVAL;
 341
 342                 }
 343                 dprintk(1, KERN_DEBUG "%s: switched to %s\n", I2C_NAME(client),
 344                         inputs[iarg]);
 345                 encoder->input = iarg;
 346         }
 347                 break;
 348
 349         case ENCODER_SET_OUTPUT:
 350         {
 351                 int *iarg = arg;
 352
 353                 /* not much choice of outputs */
 354                 if (*iarg != 0) {
 355                         return -EINVAL;
 356                 }
 357         }
 358                 break;
 359
 360         case ENCODER_ENABLE_OUTPUT:
 361         {
 362                 int *iarg = arg;
 363
 364                 encoder->enable = !!*iarg;
 365         }
 366                 break;
 367
 368         default:
 369                 return -EINVAL;
 370         }
 371
 372         return 0;
 373 }
 374
 375 /* ----------------------------------------------------------------------- */
 376
 377 /*
 378  * Generic i2c probe
 379  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
 380  */
 381 static unsigned short normal_i2c[] =
 382     { I2C_ADV7170 >> 1, (I2C_ADV7170 >> 1) + 1,
 383         I2C_ADV7171 >> 1, (I2C_ADV7171 >> 1) + 1,
 384         I2C_CLIENT_END
 385 };
 386
 387 static unsigned short ignore = I2C_CLIENT_END;
 388
 389 static struct i2c_client_address_data addr_data = {
 390         .normal_i2c             = normal_i2c,
 391         .probe                  = &ignore,
 392         .ignore                 = &ignore,
 393 };
 394
 395 static struct i2c_driver i2c_driver_adv7170;
 396
 397 static int
 398 adv7170_detect_client (struct i2c_adapter *adapter,
 399                        int                 address,
 400                        int                 kind)
 401 {
 402         int i;
 403         struct i2c_client *client;
 404         struct adv7170 *encoder;
 405         char *dname;
 406
 407         dprintk(1,
 408                 KERN_INFO
 409                 "adv7170.c: detecting adv7170 client on address 0x%x\n",
 410                 address << 1);
 411
 412         /* Check if the adapter supports the needed features */
 413         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 414                 return 0;
 415
 416         client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
 417         if (client == 0)
 418                 return -ENOMEM;
 419         client->addr = address;
 420         client->adapter = adapter;
 421         client->driver = &i2c_driver_adv7170;
 422         if ((client->addr == I2C_ADV7170 >> 1) ||
 423             (client->addr == (I2C_ADV7170 >> 1) + 1)) {
 424                 dname = adv7170_name;
 425         } else if ((client->addr == I2C_ADV7171 >> 1) ||
 426                    (client->addr == (I2C_ADV7171 >> 1) + 1)) {
 427                 dname = adv7171_name;
 428         } else {
 429                 /* We should never get here!!! */
 430                 kfree(client);
 431                 return 0;
 432         }
 433         strlcpy(I2C_NAME(client), dname, sizeof(I2C_NAME(client)));
 434
 435         encoder = kzalloc(sizeof(struct adv7170), GFP_KERNEL);
 436         if (encoder == NULL) {
 437                 kfree(client);
 438                 return -ENOMEM;
 439         }
 440         encoder->norm = VIDEO_MODE_NTSC;
 441         encoder->input = 0;
 442         encoder->enable = 1;
 443         i2c_set_clientdata(client, encoder);
 444
 445         i = i2c_attach_client(client);
 446         if (i) {
 447                 kfree(client);
 448                 kfree(encoder);
 449                 return i;
 450         }
 451
 452         i = adv7170_write_block(client, init_NTSC, sizeof(init_NTSC));
 453         if (i >= 0) {
 454                 i = adv7170_write(client, 0x07, TR0MODE | TR0RST);
 455                 i = adv7170_write(client, 0x07, TR0MODE);
 456                 i = adv7170_read(client, 0x12);
 457                 dprintk(1, KERN_INFO "%s_attach: rev. %d at 0x%02x\n",
 458                         I2C_NAME(client), i & 1, client->addr << 1);
 459         }
 460         if (i < 0) {
 461                 dprintk(1, KERN_ERR "%s_attach: init error 0x%x\n",
 462                        I2C_NAME(client), i);
 463         }
 464
 465         return 0;
 466 }
 467
 468 static int
 469 adv7170_attach_adapter (struct i2c_adapter *adapter)
 470 {
 471         dprintk(1,
 472                 KERN_INFO
 473                 "adv7170.c: starting probe for adapter %s (0x%x)\n",
 474                 I2C_NAME(adapter), adapter->id);
 475         return i2c_probe(adapter, &addr_data, &adv7170_detect_client);
 476 }
 477
 478 static int
 479 adv7170_detach_client (struct i2c_client *client)
 480 {
 481         struct adv7170 *encoder = i2c_get_clientdata(client);
 482         int err;
 483
 484         err = i2c_detach_client(client);
 485         if (err) {
 486                 return err;
 487         }
 488
 489         kfree(encoder);
 490         kfree(client);
 491
 492         return 0;
 493 }
 494
 495 /* ----------------------------------------------------------------------- */
 496
 497 static struct i2c_driver i2c_driver_adv7170 = {
 498         .driver = {
 499                 .name = "adv7170",      /* name */
 500         },
 501
 502         .id = I2C_DRIVERID_ADV7170,
 503
 504         .attach_adapter = adv7170_attach_adapter,
 505         .detach_client = adv7170_detach_client,
 506         .command = adv7170_command,
 507 };
 508
 509 static int __init
 510 adv7170_init (void)
 511 {
 512         return i2c_add_driver(&i2c_driver_adv7170);
 513 }
 514
 515 static void __exit
 516 adv7170_exit (void)
 517 {
 518         i2c_del_driver(&i2c_driver_adv7170);
 519 }
 520
 521 module_init(adv7170_init);
 522 module_exit(adv7170_exit);