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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 <asm/segment.h>
  47 #include <linux/types.h>
  48
  49 #include <linux/videodev.h>
  50 #include <asm/uaccess.h>
  51
  52 MODULE_DESCRIPTION("Analog Devices ADV7170 video encoder driver");
  53 MODULE_AUTHOR("Maxim Yevtyushkin");
  54 MODULE_LICENSE("GPL");
  55
  56 #include <linux/i2c.h>
  57 #include <linux/i2c-dev.h>
  58
  59 #define I2C_NAME(x) (x)->name
  60
  61 #include <linux/video_encoder.h>
  62
  63 static int debug = 0;
  64 module_param(debug, int, 0);
  65 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  66
  67 #define dprintk(num, format, args...) \
  68         do { \
  69                 if (debug >= num) \
  70                         printk(format, ##args); \
  71         } while (0)
  72
  73 /* ----------------------------------------------------------------------- */
  74
  75 struct adv7170 {
  76         unsigned char reg[128];
  77
  78         int norm;
  79         int input;
  80         int enable;
  81         int bright;
  82         int contrast;
  83         int hue;
  84         int sat;
  85 };
  86
  87 #define   I2C_ADV7170        0xd4
  88 #define   I2C_ADV7171        0x54
  89
  90 static char adv7170_name[] = "adv7170";
  91 static char adv7171_name[] = "adv7171";
  92
  93 static char *inputs[] = { "pass_through", "play_back" };
  94 static char *norms[] = { "PAL", "NTSC" };
  95
  96 /* ----------------------------------------------------------------------- */
  97
  98 static inline int
  99 adv7170_write (struct i2c_client *client,
 100                u8                 reg,
 101                u8                 value)
 102 {
 103         struct adv7170 *encoder = i2c_get_clientdata(client);
 104
 105         encoder->reg[reg] = value;
 106         return i2c_smbus_write_byte_data(client, reg, value);
 107 }
 108
 109 static inline int
 110 adv7170_read (struct i2c_client *client,
 111               u8                 reg)
 112 {
 113         return i2c_smbus_read_byte_data(client, reg);
 114 }
 115
 116 static int
 117 adv7170_write_block (struct i2c_client *client,
 118                      const u8          *data,
 119                      unsigned int       len)
 120 {
 121         int ret = -1;
 122         u8 reg;
 123
 124         /* the adv7170 has an autoincrement function, use it if
 125          * the adapter understands raw I2C */
 126         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 127                 /* do raw I2C, not smbus compatible */
 128                 struct adv7170 *encoder = i2c_get_clientdata(client);
 129                 struct i2c_msg msg;
 130                 u8 block_data[32];
 131
 132                 msg.addr = client->addr;
 133                 msg.flags = 0;
 134                 while (len >= 2) {
 135                         msg.buf = (char *) block_data;
 136                         msg.len = 0;
 137                         block_data[msg.len++] = reg = data[0];
 138                         do {
 139                                 block_data[msg.len++] =
 140                                     encoder->reg[reg++] = data[1];
 141                                 len -= 2;
 142                                 data += 2;
 143                         } while (len >= 2 && data[0] == reg &&
 144                                  msg.len < 32);
 145                         if ((ret = i2c_transfer(client->adapter,
 146                                                 &msg, 1)) < 0)
 147                                 break;
 148                 }
 149         } else {
 150                 /* do some slow I2C emulation kind of thing */
 151                 while (len >= 2) {
 152                         reg = *data++;
 153                         if ((ret = adv7170_write(client, reg,
 154                                                  *data++)) < 0)
 155                                 break;
 156                         len -= 2;
 157                 }
 158         }
 159
 160         return ret;
 161 }
 162
 163 /* ----------------------------------------------------------------------- */
 164 // Output filter:  S-Video  Composite
 165
 166 #define MR050       0x11        //0x09
 167 #define MR060       0x14        //0x0c
 168
 169 //---------------------------------------------------------------------------
 170
 171 #define TR0MODE     0x4c
 172 #define TR0RST      0x80
 173
 174 #define TR1CAPT     0x00
 175 #define TR1PLAY     0x00
 176
 177
 178 static const unsigned char init_NTSC[] = {
 179         0x00, 0x10,             // MR0
 180         0x01, 0x20,             // MR1
 181         0x02, 0x0e,             // MR2 RTC control: bits 2 and 1
 182         0x03, 0x80,             // MR3
 183         0x04, 0x30,             // MR4
 184         0x05, 0x00,             // Reserved
 185         0x06, 0x00,             // Reserved
 186         0x07, TR0MODE,          // TM0
 187         0x08, TR1CAPT,          // TM1
 188         0x09, 0x16,             // Fsc0
 189         0x0a, 0x7c,             // Fsc1
 190         0x0b, 0xf0,             // Fsc2
 191         0x0c, 0x21,             // Fsc3
 192         0x0d, 0x00,             // Subcarrier Phase
 193         0x0e, 0x00,             // Closed Capt. Ext 0
 194         0x0f, 0x00,             // Closed Capt. Ext 1
 195         0x10, 0x00,             // Closed Capt. 0
 196         0x11, 0x00,             // Closed Capt. 1
 197         0x12, 0x00,             // Pedestal Ctl 0
 198         0x13, 0x00,             // Pedestal Ctl 1
 199         0x14, 0x00,             // Pedestal Ctl 2
 200         0x15, 0x00,             // Pedestal Ctl 3
 201         0x16, 0x00,             // CGMS_WSS_0
 202         0x17, 0x00,             // CGMS_WSS_1
 203         0x18, 0x00,             // CGMS_WSS_2
 204         0x19, 0x00,             // Teletext Ctl
 205 };
 206
 207 static const unsigned char init_PAL[] = {
 208         0x00, 0x71,             // MR0
 209         0x01, 0x20,             // MR1
 210         0x02, 0x0e,             // MR2 RTC control: bits 2 and 1
 211         0x03, 0x80,             // MR3
 212         0x04, 0x30,             // MR4
 213         0x05, 0x00,             // Reserved
 214         0x06, 0x00,             // Reserved
 215         0x07, TR0MODE,          // TM0
 216         0x08, TR1CAPT,          // TM1
 217         0x09, 0xcb,             // Fsc0
 218         0x0a, 0x8a,             // Fsc1
 219         0x0b, 0x09,             // Fsc2
 220         0x0c, 0x2a,             // Fsc3
 221         0x0d, 0x00,             // Subcarrier Phase
 222         0x0e, 0x00,             // Closed Capt. Ext 0
 223         0x0f, 0x00,             // Closed Capt. Ext 1
 224         0x10, 0x00,             // Closed Capt. 0
 225         0x11, 0x00,             // Closed Capt. 1
 226         0x12, 0x00,             // Pedestal Ctl 0
 227         0x13, 0x00,             // Pedestal Ctl 1
 228         0x14, 0x00,             // Pedestal Ctl 2
 229         0x15, 0x00,             // Pedestal Ctl 3
 230         0x16, 0x00,             // CGMS_WSS_0
 231         0x17, 0x00,             // CGMS_WSS_1
 232         0x18, 0x00,             // CGMS_WSS_2
 233         0x19, 0x00,             // Teletext Ctl
 234 };
 235
 236
 237 static int
 238 adv7170_command (struct i2c_client *client,
 239                  unsigned int       cmd,
 240                  void *             arg)
 241 {
 242         struct adv7170 *encoder = i2c_get_clientdata(client);
 243
 244         switch (cmd) {
 245
 246         case 0:
 247 #if 0
 248                 /* This is just for testing!!! */
 249                 adv7170_write_block(client, init_common,
 250                                     sizeof(init_common));
 251                 adv7170_write(client, 0x07, TR0MODE | TR0RST);
 252                 adv7170_write(client, 0x07, TR0MODE);
 253 #endif
 254                 break;
 255
 256         case ENCODER_GET_CAPABILITIES:
 257         {
 258                 struct video_encoder_capability *cap = arg;
 259
 260                 cap->flags = VIDEO_ENCODER_PAL |
 261                              VIDEO_ENCODER_NTSC;
 262                 cap->inputs = 2;
 263                 cap->outputs = 1;
 264         }
 265                 break;
 266
 267         case ENCODER_SET_NORM:
 268         {
 269                 int iarg = *(int *) arg;
 270
 271                 dprintk(1, KERN_DEBUG "%s_command: set norm %d",
 272                         I2C_NAME(client), iarg);
 273
 274                 switch (iarg) {
 275
 276                 case VIDEO_MODE_NTSC:
 277                         adv7170_write_block(client, init_NTSC,
 278                                             sizeof(init_NTSC));
 279                         if (encoder->input == 0)
 280                                 adv7170_write(client, 0x02, 0x0e);      // Enable genlock
 281                         adv7170_write(client, 0x07, TR0MODE | TR0RST);
 282                         adv7170_write(client, 0x07, TR0MODE);
 283                         break;
 284
 285                 case VIDEO_MODE_PAL:
 286                         adv7170_write_block(client, init_PAL,
 287                                             sizeof(init_PAL));
 288                         if (encoder->input == 0)
 289                                 adv7170_write(client, 0x02, 0x0e);      // Enable genlock
 290                         adv7170_write(client, 0x07, TR0MODE | TR0RST);
 291                         adv7170_write(client, 0x07, TR0MODE);
 292                         break;
 293
 294                 default:
 295                         dprintk(1, KERN_ERR "%s: illegal norm: %d\n",
 296                                I2C_NAME(client), iarg);
 297                         return -EINVAL;
 298
 299                 }
 300                 dprintk(1, KERN_DEBUG "%s: switched to %s\n", I2C_NAME(client),
 301                         norms[iarg]);
 302                 encoder->norm = iarg;
 303         }
 304                 break;
 305
 306         case ENCODER_SET_INPUT:
 307         {
 308                 int iarg = *(int *) arg;
 309
 310                 /* RJ: *iarg = 0: input is from decoder
 311                  *iarg = 1: input is from ZR36060
 312                  *iarg = 2: color bar */
 313
 314                 dprintk(1, KERN_DEBUG "%s_command: set input from %s\n",
 315                         I2C_NAME(client),
 316                         iarg == 0 ? "decoder" : "ZR36060");
 317
 318                 switch (iarg) {
 319
 320                 case 0:
 321                         adv7170_write(client, 0x01, 0x20);
 322                         adv7170_write(client, 0x08, TR1CAPT);   /* TR1 */
 323                         adv7170_write(client, 0x02, 0x0e);      // Enable genlock
 324                         adv7170_write(client, 0x07, TR0MODE | TR0RST);
 325                         adv7170_write(client, 0x07, TR0MODE);
 326                         //udelay(10);
 327                         break;
 328
 329                 case 1:
 330                         adv7170_write(client, 0x01, 0x00);
 331                         adv7170_write(client, 0x08, TR1PLAY);   /* TR1 */
 332                         adv7170_write(client, 0x02, 0x08);
 333                         adv7170_write(client, 0x07, TR0MODE | TR0RST);
 334                         adv7170_write(client, 0x07, TR0MODE);
 335                         //udelay(10);
 336                         break;
 337
 338                 default:
 339                         dprintk(1, KERN_ERR "%s: illegal input: %d\n",
 340                                 I2C_NAME(client), iarg);
 341                         return -EINVAL;
 342
 343                 }
 344                 dprintk(1, KERN_DEBUG "%s: switched to %s\n", I2C_NAME(client),
 345                         inputs[iarg]);
 346                 encoder->input = iarg;
 347         }
 348                 break;
 349
 350         case ENCODER_SET_OUTPUT:
 351         {
 352                 int *iarg = arg;
 353
 354                 /* not much choice of outputs */
 355                 if (*iarg != 0) {
 356                         return -EINVAL;
 357                 }
 358         }
 359                 break;
 360
 361         case ENCODER_ENABLE_OUTPUT:
 362         {
 363                 int *iarg = arg;
 364
 365                 encoder->enable = !!*iarg;
 366         }
 367                 break;
 368
 369         default:
 370                 return -EINVAL;
 371         }
 372
 373         return 0;
 374 }
 375
 376 /* ----------------------------------------------------------------------- */
 377
 378 /*
 379  * Generic i2c probe
 380  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
 381  */
 382 static unsigned short normal_i2c[] =
 383     { I2C_ADV7170 >> 1, (I2C_ADV7170 >> 1) + 1,
 384         I2C_ADV7171 >> 1, (I2C_ADV7171 >> 1) + 1,
 385         I2C_CLIENT_END
 386 };
 387
 388 static unsigned short ignore = I2C_CLIENT_END;
 389
 390 static struct i2c_client_address_data addr_data = {
 391         .normal_i2c             = normal_i2c,
 392         .probe                  = &ignore,
 393         .ignore                 = &ignore,
 394         .force                  = &ignore,
 395 };
 396
 397 static struct i2c_driver i2c_driver_adv7170;
 398
 399 static int
 400 adv7170_detect_client (struct i2c_adapter *adapter,
 401                        int                 address,
 402                        int                 kind)
 403 {
 404         int i;
 405         struct i2c_client *client;
 406         struct adv7170 *encoder;
 407         char *dname;
 408
 409         dprintk(1,
 410                 KERN_INFO
 411                 "adv7170.c: detecting adv7170 client on address 0x%x\n",
 412                 address << 1);
 413
 414         /* Check if the adapter supports the needed features */
 415         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 416                 return 0;
 417
 418         client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
 419         if (client == 0)
 420                 return -ENOMEM;
 421         memset(client, 0, sizeof(struct i2c_client));
 422         client->addr = address;
 423         client->adapter = adapter;
 424         client->driver = &i2c_driver_adv7170;
 425         client->flags = I2C_CLIENT_ALLOW_USE;
 426         if ((client->addr == I2C_ADV7170 >> 1) ||
 427             (client->addr == (I2C_ADV7170 >> 1) + 1)) {
 428                 dname = adv7170_name;
 429         } else if ((client->addr == I2C_ADV7171 >> 1) ||
 430                    (client->addr == (I2C_ADV7171 >> 1) + 1)) {
 431                 dname = adv7171_name;
 432         } else {
 433                 /* We should never get here!!! */
 434                 kfree(client);
 435                 return 0;
 436         }
 437         strlcpy(I2C_NAME(client), dname, sizeof(I2C_NAME(client)));
 438
 439         encoder = kmalloc(sizeof(struct adv7170), GFP_KERNEL);
 440         if (encoder == NULL) {
 441                 kfree(client);
 442                 return -ENOMEM;
 443         }
 444         memset(encoder, 0, sizeof(struct adv7170));
 445         encoder->norm = VIDEO_MODE_NTSC;
 446         encoder->input = 0;
 447         encoder->enable = 1;
 448         i2c_set_clientdata(client, encoder);
 449
 450         i = i2c_attach_client(client);
 451         if (i) {
 452                 kfree(client);
 453                 kfree(encoder);
 454                 return i;
 455         }
 456
 457         i = adv7170_write_block(client, init_NTSC, sizeof(init_NTSC));
 458         if (i >= 0) {
 459                 i = adv7170_write(client, 0x07, TR0MODE | TR0RST);
 460                 i = adv7170_write(client, 0x07, TR0MODE);
 461                 i = adv7170_read(client, 0x12);
 462                 dprintk(1, KERN_INFO "%s_attach: rev. %d at 0x%02x\n",
 463                         I2C_NAME(client), i & 1, client->addr << 1);
 464         }
 465         if (i < 0) {
 466                 dprintk(1, KERN_ERR "%s_attach: init error 0x%x\n",
 467                        I2C_NAME(client), i);
 468         }
 469
 470         return 0;
 471 }
 472
 473 static int
 474 adv7170_attach_adapter (struct i2c_adapter *adapter)
 475 {
 476         dprintk(1,
 477                 KERN_INFO
 478                 "adv7170.c: starting probe for adapter %s (0x%x)\n",
 479                 I2C_NAME(adapter), adapter->id);
 480         return i2c_probe(adapter, &addr_data, &adv7170_detect_client);
 481 }
 482
 483 static int
 484 adv7170_detach_client (struct i2c_client *client)
 485 {
 486         struct adv7170 *encoder = i2c_get_clientdata(client);
 487         int err;
 488
 489         err = i2c_detach_client(client);
 490         if (err) {
 491                 return err;
 492         }
 493
 494         kfree(encoder);
 495         kfree(client);
 496
 497         return 0;
 498 }
 499
 500 /* ----------------------------------------------------------------------- */
 501
 502 static struct i2c_driver i2c_driver_adv7170 = {
 503         .owner = THIS_MODULE,
 504         .name = "adv7170",      /* name */
 505
 506         .id = I2C_DRIVERID_ADV7170,
 507         .flags = I2C_DF_NOTIFY,
 508
 509         .attach_adapter = adv7170_attach_adapter,
 510         .detach_client = adv7170_detach_client,
 511         .command = adv7170_command,
 512 };
 513
 514 static int __init
 515 adv7170_init (void)
 516 {
 517         return i2c_add_driver(&i2c_driver_adv7170);
 518 }
 519
 520 static void __exit
 521 adv7170_exit (void)
 522 {
 523         i2c_del_driver(&i2c_driver_adv7170);
 524 }
 525
 526 module_init(adv7170_init);
 527 module_exit(adv7170_exit);