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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                 struct i2c_msg msg;
 128                 u8 block_data[32];
 129
 130                 msg.addr = client->addr;
 131                 msg.flags = 0;
 132                 while (len >= 2) {
 133                         msg.buf = (char *) block_data;
 134                         msg.len = 0;
 135                         block_data[msg.len++] = reg = data[0];
 136                         do {
 137                                 block_data[msg.len++] =
 138                                     encoder->reg[reg++] = data[1];
 139                                 len -= 2;
 140                                 data += 2;
 141                         } while (len >= 2 && data[0] == reg &&
 142                                  msg.len < 32);
 143                         if ((ret = i2c_transfer(client->adapter,
 144                                                 &msg, 1)) < 0)
 145                                 break;
 146                 }
 147         } else {
 148                 /* do some slow I2C emulation kind of thing */
 149                 while (len >= 2) {
 150                         reg = *data++;
 151                         if ((ret = adv7170_write(client, reg,
 152                                                  *data++)) < 0)
 153                                 break;
 154                         len -= 2;
 155                 }
 156         }
 157
 158         return ret;
 159 }
 160
 161 /* ----------------------------------------------------------------------- */
 162 // Output filter:  S-Video  Composite
 163
 164 #define MR050       0x11        //0x09
 165 #define MR060       0x14        //0x0c
 166
 167 //---------------------------------------------------------------------------
 168
 169 #define TR0MODE     0x4c
 170 #define TR0RST      0x80
 171
 172 #define TR1CAPT     0x00
 173 #define TR1PLAY     0x00
 174
 175
 176 static const unsigned char init_NTSC[] = {
 177         0x00, 0x10,             // MR0
 178         0x01, 0x20,             // MR1
 179         0x02, 0x0e,             // MR2 RTC control: bits 2 and 1
 180         0x03, 0x80,             // MR3
 181         0x04, 0x30,             // MR4
 182         0x05, 0x00,             // Reserved
 183         0x06, 0x00,             // Reserved
 184         0x07, TR0MODE,          // TM0
 185         0x08, TR1CAPT,          // TM1
 186         0x09, 0x16,             // Fsc0
 187         0x0a, 0x7c,             // Fsc1
 188         0x0b, 0xf0,             // Fsc2
 189         0x0c, 0x21,             // Fsc3
 190         0x0d, 0x00,             // Subcarrier Phase
 191         0x0e, 0x00,             // Closed Capt. Ext 0
 192         0x0f, 0x00,             // Closed Capt. Ext 1
 193         0x10, 0x00,             // Closed Capt. 0
 194         0x11, 0x00,             // Closed Capt. 1
 195         0x12, 0x00,             // Pedestal Ctl 0
 196         0x13, 0x00,             // Pedestal Ctl 1
 197         0x14, 0x00,             // Pedestal Ctl 2
 198         0x15, 0x00,             // Pedestal Ctl 3
 199         0x16, 0x00,             // CGMS_WSS_0
 200         0x17, 0x00,             // CGMS_WSS_1
 201         0x18, 0x00,             // CGMS_WSS_2
 202         0x19, 0x00,             // Teletext Ctl
 203 };
 204
 205 static const unsigned char init_PAL[] = {
 206         0x00, 0x71,             // MR0
 207         0x01, 0x20,             // MR1
 208         0x02, 0x0e,             // MR2 RTC control: bits 2 and 1
 209         0x03, 0x80,             // MR3
 210         0x04, 0x30,             // MR4
 211         0x05, 0x00,             // Reserved
 212         0x06, 0x00,             // Reserved
 213         0x07, TR0MODE,          // TM0
 214         0x08, TR1CAPT,          // TM1
 215         0x09, 0xcb,             // Fsc0
 216         0x0a, 0x8a,             // Fsc1
 217         0x0b, 0x09,             // Fsc2
 218         0x0c, 0x2a,             // Fsc3
 219         0x0d, 0x00,             // Subcarrier Phase
 220         0x0e, 0x00,             // Closed Capt. Ext 0
 221         0x0f, 0x00,             // Closed Capt. Ext 1
 222         0x10, 0x00,             // Closed Capt. 0
 223         0x11, 0x00,             // Closed Capt. 1
 224         0x12, 0x00,             // Pedestal Ctl 0
 225         0x13, 0x00,             // Pedestal Ctl 1
 226         0x14, 0x00,             // Pedestal Ctl 2
 227         0x15, 0x00,             // Pedestal Ctl 3
 228         0x16, 0x00,             // CGMS_WSS_0
 229         0x17, 0x00,             // CGMS_WSS_1
 230         0x18, 0x00,             // CGMS_WSS_2
 231         0x19, 0x00,             // Teletext Ctl
 232 };
 233
 234
 235 static int
 236 adv7170_command (struct i2c_client *client,
 237                  unsigned int       cmd,
 238                  void *             arg)
 239 {
 240         struct adv7170 *encoder = i2c_get_clientdata(client);
 241
 242         switch (cmd) {
 243
 244         case 0:
 245 #if 0
 246                 /* This is just for testing!!! */
 247                 adv7170_write_block(client, init_common,
 248                                     sizeof(init_common));
 249                 adv7170_write(client, 0x07, TR0MODE | TR0RST);
 250                 adv7170_write(client, 0x07, TR0MODE);
 251 #endif
 252                 break;
 253
 254         case ENCODER_GET_CAPABILITIES:
 255         {
 256                 struct video_encoder_capability *cap = arg;
 257
 258                 cap->flags = VIDEO_ENCODER_PAL |
 259                              VIDEO_ENCODER_NTSC;
 260                 cap->inputs = 2;
 261                 cap->outputs = 1;
 262         }
 263                 break;
 264
 265         case ENCODER_SET_NORM:
 266         {
 267                 int iarg = *(int *) arg;
 268
 269                 dprintk(1, KERN_DEBUG "%s_command: set norm %d",
 270                         I2C_NAME(client), iarg);
 271
 272                 switch (iarg) {
 273
 274                 case VIDEO_MODE_NTSC:
 275                         adv7170_write_block(client, init_NTSC,
 276                                             sizeof(init_NTSC));
 277                         if (encoder->input == 0)
 278                                 adv7170_write(client, 0x02, 0x0e);      // Enable genlock
 279                         adv7170_write(client, 0x07, TR0MODE | TR0RST);
 280                         adv7170_write(client, 0x07, TR0MODE);
 281                         break;
 282
 283                 case VIDEO_MODE_PAL:
 284                         adv7170_write_block(client, init_PAL,
 285                                             sizeof(init_PAL));
 286                         if (encoder->input == 0)
 287                                 adv7170_write(client, 0x02, 0x0e);      // Enable genlock
 288                         adv7170_write(client, 0x07, TR0MODE | TR0RST);
 289                         adv7170_write(client, 0x07, TR0MODE);
 290                         break;
 291
 292                 default:
 293                         dprintk(1, KERN_ERR "%s: illegal norm: %d\n",
 294                                I2C_NAME(client), iarg);
 295                         return -EINVAL;
 296
 297                 }
 298                 dprintk(1, KERN_DEBUG "%s: switched to %s\n", I2C_NAME(client),
 299                         norms[iarg]);
 300                 encoder->norm = iarg;
 301         }
 302                 break;
 303
 304         case ENCODER_SET_INPUT:
 305         {
 306                 int iarg = *(int *) arg;
 307
 308                 /* RJ: *iarg = 0: input is from decoder
 309                  *iarg = 1: input is from ZR36060
 310                  *iarg = 2: color bar */
 311
 312                 dprintk(1, KERN_DEBUG "%s_command: set input from %s\n",
 313                         I2C_NAME(client),
 314                         iarg == 0 ? "decoder" : "ZR36060");
 315
 316                 switch (iarg) {
 317
 318                 case 0:
 319                         adv7170_write(client, 0x01, 0x20);
 320                         adv7170_write(client, 0x08, TR1CAPT);   /* TR1 */
 321                         adv7170_write(client, 0x02, 0x0e);      // Enable genlock
 322                         adv7170_write(client, 0x07, TR0MODE | TR0RST);
 323                         adv7170_write(client, 0x07, TR0MODE);
 324                         //udelay(10);
 325                         break;
 326
 327                 case 1:
 328                         adv7170_write(client, 0x01, 0x00);
 329                         adv7170_write(client, 0x08, TR1PLAY);   /* TR1 */
 330                         adv7170_write(client, 0x02, 0x08);
 331                         adv7170_write(client, 0x07, TR0MODE | TR0RST);
 332                         adv7170_write(client, 0x07, TR0MODE);
 333                         //udelay(10);
 334                         break;
 335
 336                 default:
 337                         dprintk(1, KERN_ERR "%s: illegal input: %d\n",
 338                                 I2C_NAME(client), iarg);
 339                         return -EINVAL;
 340
 341                 }
 342                 dprintk(1, KERN_DEBUG "%s: switched to %s\n", I2C_NAME(client),
 343                         inputs[iarg]);
 344                 encoder->input = iarg;
 345         }
 346                 break;
 347
 348         case ENCODER_SET_OUTPUT:
 349         {
 350                 int *iarg = arg;
 351
 352                 /* not much choice of outputs */
 353                 if (*iarg != 0) {
 354                         return -EINVAL;
 355                 }
 356         }
 357                 break;
 358
 359         case ENCODER_ENABLE_OUTPUT:
 360         {
 361                 int *iarg = arg;
 362
 363                 encoder->enable = !!*iarg;
 364         }
 365                 break;
 366
 367         default:
 368                 return -EINVAL;
 369         }
 370
 371         return 0;
 372 }
 373
 374 /* ----------------------------------------------------------------------- */
 375
 376 /*
 377  * Generic i2c probe
 378  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
 379  */
 380 static unsigned short normal_i2c[] =
 381     { I2C_ADV7170 >> 1, (I2C_ADV7170 >> 1) + 1,
 382         I2C_ADV7171 >> 1, (I2C_ADV7171 >> 1) + 1,
 383         I2C_CLIENT_END
 384 };
 385
 386 static unsigned short ignore = I2C_CLIENT_END;
 387
 388 static struct i2c_client_address_data addr_data = {
 389         .normal_i2c             = normal_i2c,
 390         .probe                  = &ignore,
 391         .ignore                 = &ignore,
 392 };
 393
 394 static struct i2c_driver i2c_driver_adv7170;
 395
 396 static int
 397 adv7170_detect_client (struct i2c_adapter *adapter,
 398                        int                 address,
 399                        int                 kind)
 400 {
 401         int i;
 402         struct i2c_client *client;
 403         struct adv7170 *encoder;
 404         char *dname;
 405
 406         dprintk(1,
 407                 KERN_INFO
 408                 "adv7170.c: detecting adv7170 client on address 0x%x\n",
 409                 address << 1);
 410
 411         /* Check if the adapter supports the needed features */
 412         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 413                 return 0;
 414
 415         client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
 416         if (client == 0)
 417                 return -ENOMEM;
 418         client->addr = address;
 419         client->adapter = adapter;
 420         client->driver = &i2c_driver_adv7170;
 421         if ((client->addr == I2C_ADV7170 >> 1) ||
 422             (client->addr == (I2C_ADV7170 >> 1) + 1)) {
 423                 dname = adv7170_name;
 424         } else if ((client->addr == I2C_ADV7171 >> 1) ||
 425                    (client->addr == (I2C_ADV7171 >> 1) + 1)) {
 426                 dname = adv7171_name;
 427         } else {
 428                 /* We should never get here!!! */
 429                 kfree(client);
 430                 return 0;
 431         }
 432         strlcpy(I2C_NAME(client), dname, sizeof(I2C_NAME(client)));
 433
 434         encoder = kzalloc(sizeof(struct adv7170), GFP_KERNEL);
 435         if (encoder == NULL) {
 436                 kfree(client);
 437                 return -ENOMEM;
 438         }
 439         encoder->norm = VIDEO_MODE_NTSC;
 440         encoder->input = 0;
 441         encoder->enable = 1;
 442         i2c_set_clientdata(client, encoder);
 443
 444         i = i2c_attach_client(client);
 445         if (i) {
 446                 kfree(client);
 447                 kfree(encoder);
 448                 return i;
 449         }
 450
 451         i = adv7170_write_block(client, init_NTSC, sizeof(init_NTSC));
 452         if (i >= 0) {
 453                 i = adv7170_write(client, 0x07, TR0MODE | TR0RST);
 454                 i = adv7170_write(client, 0x07, TR0MODE);
 455                 i = adv7170_read(client, 0x12);
 456                 dprintk(1, KERN_INFO "%s_attach: rev. %d at 0x%02x\n",
 457                         I2C_NAME(client), i & 1, client->addr << 1);
 458         }
 459         if (i < 0) {
 460                 dprintk(1, KERN_ERR "%s_attach: init error 0x%x\n",
 461                        I2C_NAME(client), i);
 462         }
 463
 464         return 0;
 465 }
 466
 467 static int
 468 adv7170_attach_adapter (struct i2c_adapter *adapter)
 469 {
 470         dprintk(1,
 471                 KERN_INFO
 472                 "adv7170.c: starting probe for adapter %s (0x%x)\n",
 473                 I2C_NAME(adapter), adapter->id);
 474         return i2c_probe(adapter, &addr_data, &adv7170_detect_client);
 475 }
 476
 477 static int
 478 adv7170_detach_client (struct i2c_client *client)
 479 {
 480         struct adv7170 *encoder = i2c_get_clientdata(client);
 481         int err;
 482
 483         err = i2c_detach_client(client);
 484         if (err) {
 485                 return err;
 486         }
 487
 488         kfree(encoder);
 489         kfree(client);
 490
 491         return 0;
 492 }
 493
 494 /* ----------------------------------------------------------------------- */
 495
 496 static struct i2c_driver i2c_driver_adv7170 = {
 497         .driver = {
 498                 .name = "adv7170",      /* name */
 499         },
 500
 501         .id = I2C_DRIVERID_ADV7170,
 502
 503         .attach_adapter = adv7170_attach_adapter,
 504         .detach_client = adv7170_detach_client,
 505         .command = adv7170_command,
 506 };
 507
 508 static int __init
 509 adv7170_init (void)
 510 {
 511         return i2c_add_driver(&i2c_driver_adv7170);
 512 }
 513
 514 static void __exit
 515 adv7170_exit (void)
 516 {
 517         i2c_del_driver(&i2c_driver_adv7170);
 518 }
 519
 520 module_init(adv7170_init);
 521 module_exit(adv7170_exit);