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