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