drivers/media/video/saa7185.c

   1 /*
   2  * saa7185 - Philips SAA7185B video encoder driver version 0.0.3
   3  *
   4  * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
   5  *
   6  * Slight changes for video timing and attachment output by
   7  * Wolfgang Scherr <scherr@net4you.net>
   8  *
   9  * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
  10  *    - moved over to linux>=2.4.x i2c protocol (1/1/2003)
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  25  */
  26
  27 #include <linux/module.h>
  28 #include <linux/init.h>
  29 #include <linux/delay.h>
  30 #include <linux/errno.h>
  31 #include <linux/fs.h>
  32 #include <linux/kernel.h>
  33 #include <linux/major.h>
  34 #include <linux/slab.h>
  35 #include <linux/mm.h>
  36 #include <linux/pci.h>
  37 #include <linux/signal.h>
  38 #include <asm/io.h>
  39 #include <asm/pgtable.h>
  40 #include <asm/page.h>
  41 #include <linux/sched.h>
  42 #include <linux/types.h>
  43
  44 #include <linux/videodev.h>
  45 #include <asm/uaccess.h>
  46
  47 MODULE_DESCRIPTION("Philips SAA7185 video encoder driver");
  48 MODULE_AUTHOR("Dave Perks");
  49 MODULE_LICENSE("GPL");
  50
  51 #include <linux/i2c.h>
  52
  53 #define I2C_NAME(s) (s)->name
  54
  55 #include <linux/video_encoder.h>
  56
  57 static int debug = 0;
  58 module_param(debug, int, 0);
  59 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  60
  61 #define dprintk(num, format, args...) \
  62         do { \
  63                 if (debug >= num) \
  64                         printk(format, ##args); \
  65         } while (0)
  66
  67 /* ----------------------------------------------------------------------- */
  68
  69 struct saa7185 {
  70         unsigned char reg[128];
  71
  72         int norm;
  73         int enable;
  74         int bright;
  75         int contrast;
  76         int hue;
  77         int sat;
  78 };
  79
  80 #define   I2C_SAA7185        0x88
  81
  82 /* ----------------------------------------------------------------------- */
  83
  84 static inline int
  85 saa7185_read (struct i2c_client *client)
  86 {
  87         return i2c_smbus_read_byte(client);
  88 }
  89
  90 static int
  91 saa7185_write (struct i2c_client *client,
  92                u8                 reg,
  93                u8                 value)
  94 {
  95         struct saa7185 *encoder = i2c_get_clientdata(client);
  96
  97         dprintk(1, KERN_DEBUG "SAA7185: %02x set to %02x\n", reg, value);
  98         encoder->reg[reg] = value;
  99         return i2c_smbus_write_byte_data(client, reg, value);
 100 }
 101
 102 static int
 103 saa7185_write_block (struct i2c_client *client,
 104                      const u8          *data,
 105                      unsigned int       len)
 106 {
 107         int ret = -1;
 108         u8 reg;
 109
 110         /* the adv7175 has an autoincrement function, use it if
 111          * the adapter understands raw I2C */
 112         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 113                 /* do raw I2C, not smbus compatible */
 114                 struct saa7185 *encoder = i2c_get_clientdata(client);
 115                 u8 block_data[32];
 116                 int block_len;
 117
 118                 while (len >= 2) {
 119                         block_len = 0;
 120                         block_data[block_len++] = reg = data[0];
 121                         do {
 122                                 block_data[block_len++] =
 123                                     encoder->reg[reg++] = data[1];
 124                                 len -= 2;
 125                                 data += 2;
 126                         } while (len >= 2 && data[0] == reg &&
 127                                  block_len < 32);
 128                         if ((ret = i2c_master_send(client, block_data,
 129                                                    block_len)) < 0)
 130                                 break;
 131                 }
 132         } else {
 133                 /* do some slow I2C emulation kind of thing */
 134                 while (len >= 2) {
 135                         reg = *data++;
 136                         if ((ret = saa7185_write(client, reg,
 137                                                  *data++)) < 0)
 138                                 break;
 139                         len -= 2;
 140                 }
 141         }
 142
 143         return ret;
 144 }
 145
 146 /* ----------------------------------------------------------------------- */
 147
 148 static const unsigned char init_common[] = {
 149         0x3a, 0x0f,             /* CBENB=0, V656=0, VY2C=1,
 150                                  * YUV2C=1, MY2C=1, MUV2C=1 */
 151
 152         0x42, 0x6b,             /* OVLY0=107 */
 153         0x43, 0x00,             /* OVLU0=0     white */
 154         0x44, 0x00,             /* OVLV0=0   */
 155         0x45, 0x22,             /* OVLY1=34  */
 156         0x46, 0xac,             /* OVLU1=172   yellow */
 157         0x47, 0x0e,             /* OVLV1=14  */
 158         0x48, 0x03,             /* OVLY2=3   */
 159         0x49, 0x1d,             /* OVLU2=29    cyan */
 160         0x4a, 0xac,             /* OVLV2=172 */
 161         0x4b, 0xf0,             /* OVLY3=240 */
 162         0x4c, 0xc8,             /* OVLU3=200   green */
 163         0x4d, 0xb9,             /* OVLV3=185 */
 164         0x4e, 0xd4,             /* OVLY4=212 */
 165         0x4f, 0x38,             /* OVLU4=56    magenta */
 166         0x50, 0x47,             /* OVLV4=71  */
 167         0x51, 0xc1,             /* OVLY5=193 */
 168         0x52, 0xe3,             /* OVLU5=227   red */
 169         0x53, 0x54,             /* OVLV5=84  */
 170         0x54, 0xa3,             /* OVLY6=163 */
 171         0x55, 0x54,             /* OVLU6=84    blue */
 172         0x56, 0xf2,             /* OVLV6=242 */
 173         0x57, 0x90,             /* OVLY7=144 */
 174         0x58, 0x00,             /* OVLU7=0     black */
 175         0x59, 0x00,             /* OVLV7=0   */
 176
 177         0x5a, 0x00,             /* CHPS=0    */
 178         0x5b, 0x76,             /* GAINU=118 */
 179         0x5c, 0xa5,             /* GAINV=165 */
 180         0x5d, 0x3c,             /* BLCKL=60  */
 181         0x5e, 0x3a,             /* BLNNL=58  */
 182         0x5f, 0x3a,             /* CCRS=0, BLNVB=58 */
 183         0x60, 0x00,             /* NULL      */
 184
 185         /* 0x61 - 0x66 set according to norm */
 186
 187         0x67, 0x00,             /* 0 : caption 1st byte odd  field */
 188         0x68, 0x00,             /* 0 : caption 2nd byte odd  field */
 189         0x69, 0x00,             /* 0 : caption 1st byte even field */
 190         0x6a, 0x00,             /* 0 : caption 2nd byte even field */
 191
 192         0x6b, 0x91,             /* MODIN=2, PCREF=0, SCCLN=17 */
 193         0x6c, 0x20,             /* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0,
 194                                  * CBLF=0, ORCV2=0, PRCV2=0 */
 195         0x6d, 0x00,             /* SRCM1=0, CCEN=0 */
 196
 197         0x6e, 0x0e,             /* HTRIG=0x005, approx. centered, at
 198                                  * least for PAL */
 199         0x6f, 0x00,             /* HTRIG upper bits */
 200         0x70, 0x20,             /* PHRES=0, SBLN=1, VTRIG=0 */
 201
 202         /* The following should not be needed */
 203
 204         0x71, 0x15,             /* BMRQ=0x115 */
 205         0x72, 0x90,             /* EMRQ=0x690 */
 206         0x73, 0x61,             /* EMRQ=0x690, BMRQ=0x115 */
 207         0x74, 0x00,             /* NULL       */
 208         0x75, 0x00,             /* NULL       */
 209         0x76, 0x00,             /* NULL       */
 210         0x77, 0x15,             /* BRCV=0x115 */
 211         0x78, 0x90,             /* ERCV=0x690 */
 212         0x79, 0x61,             /* ERCV=0x690, BRCV=0x115 */
 213
 214         /* Field length controls */
 215
 216         0x7a, 0x70,             /* FLC=0 */
 217
 218         /* The following should not be needed if SBLN = 1 */
 219
 220         0x7b, 0x16,             /* FAL=22 */
 221         0x7c, 0x35,             /* LAL=244 */
 222         0x7d, 0x20,             /* LAL=244, FAL=22 */
 223 };
 224
 225 static const unsigned char init_pal[] = {
 226         0x61, 0x1e,             /* FISE=0, PAL=1, SCBW=1, RTCE=1,
 227                                  * YGS=1, INPI=0, DOWN=0 */
 228         0x62, 0xc8,             /* DECTYP=1, BSTA=72 */
 229         0x63, 0xcb,             /* FSC0 */
 230         0x64, 0x8a,             /* FSC1 */
 231         0x65, 0x09,             /* FSC2 */
 232         0x66, 0x2a,             /* FSC3 */
 233 };
 234
 235 static const unsigned char init_ntsc[] = {
 236         0x61, 0x1d,             /* FISE=1, PAL=0, SCBW=1, RTCE=1,
 237                                  * YGS=1, INPI=0, DOWN=0 */
 238         0x62, 0xe6,             /* DECTYP=1, BSTA=102 */
 239         0x63, 0x1f,             /* FSC0 */
 240         0x64, 0x7c,             /* FSC1 */
 241         0x65, 0xf0,             /* FSC2 */
 242         0x66, 0x21,             /* FSC3 */
 243 };
 244
 245 static int
 246 saa7185_command (struct i2c_client *client,
 247                  unsigned int       cmd,
 248                  void              *arg)
 249 {
 250         struct saa7185 *encoder = i2c_get_clientdata(client);
 251
 252         switch (cmd) {
 253
 254         case 0:
 255                 saa7185_write_block(client, init_common,
 256                                     sizeof(init_common));
 257                 switch (encoder->norm) {
 258
 259                 case VIDEO_MODE_NTSC:
 260                         saa7185_write_block(client, init_ntsc,
 261                                             sizeof(init_ntsc));
 262                         break;
 263
 264                 case VIDEO_MODE_PAL:
 265                         saa7185_write_block(client, init_pal,
 266                                             sizeof(init_pal));
 267                         break;
 268                 }
 269
 270                 break;
 271
 272         case ENCODER_GET_CAPABILITIES:
 273         {
 274                 struct video_encoder_capability *cap = arg;
 275
 276                 cap->flags =
 277                     VIDEO_ENCODER_PAL | VIDEO_ENCODER_NTSC |
 278                     VIDEO_ENCODER_SECAM | VIDEO_ENCODER_CCIR;
 279                 cap->inputs = 1;
 280                 cap->outputs = 1;
 281         }
 282                 break;
 283
 284         case ENCODER_SET_NORM:
 285         {
 286                 int *iarg = arg;
 287
 288                 //saa7185_write_block(client, init_common, sizeof(init_common));
 289
 290                 switch (*iarg) {
 291
 292                 case VIDEO_MODE_NTSC:
 293                         saa7185_write_block(client, init_ntsc,
 294                                             sizeof(init_ntsc));
 295                         break;
 296
 297                 case VIDEO_MODE_PAL:
 298                         saa7185_write_block(client, init_pal,
 299                                             sizeof(init_pal));
 300                         break;
 301
 302                 case VIDEO_MODE_SECAM:
 303                 default:
 304                         return -EINVAL;
 305
 306                 }
 307                 encoder->norm = *iarg;
 308         }
 309                 break;
 310
 311         case ENCODER_SET_INPUT:
 312         {
 313                 int *iarg = arg;
 314
 315                 /* RJ: *iarg = 0: input is from SA7111
 316                  *iarg = 1: input is from ZR36060 */
 317
 318                 switch (*iarg) {
 319
 320                 case 0:
 321                         /* Switch RTCE to 1 */
 322                         saa7185_write(client, 0x61,
 323                                       (encoder->reg[0x61] & 0xf7) | 0x08);
 324                         saa7185_write(client, 0x6e, 0x01);
 325                         break;
 326
 327                 case 1:
 328                         /* Switch RTCE to 0 */
 329                         saa7185_write(client, 0x61,
 330                                       (encoder->reg[0x61] & 0xf7) | 0x00);
 331                         /* SW: a slight sync problem... */
 332                         saa7185_write(client, 0x6e, 0x00);
 333                         break;
 334
 335                 default:
 336                         return -EINVAL;
 337
 338                 }
 339         }
 340                 break;
 341
 342         case ENCODER_SET_OUTPUT:
 343         {
 344                 int *iarg = arg;
 345
 346                 /* not much choice of outputs */
 347                 if (*iarg != 0) {
 348                         return -EINVAL;
 349                 }
 350         }
 351                 break;
 352
 353         case ENCODER_ENABLE_OUTPUT:
 354         {
 355                 int *iarg = arg;
 356
 357                 encoder->enable = !!*iarg;
 358                 saa7185_write(client, 0x61,
 359                               (encoder->reg[0x61] & 0xbf) |
 360                               (encoder->enable ? 0x00 : 0x40));
 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[] = { I2C_SAA7185 >> 1, I2C_CLIENT_END };
 378
 379 static unsigned short ignore = I2C_CLIENT_END;
 380
 381 static struct i2c_client_address_data addr_data = {
 382         .normal_i2c             = normal_i2c,
 383         .probe                  = &ignore,
 384         .ignore                 = &ignore,
 385 };
 386
 387 static struct i2c_driver i2c_driver_saa7185;
 388
 389 static int
 390 saa7185_detect_client (struct i2c_adapter *adapter,
 391                        int                 address,
 392                        int                 kind)
 393 {
 394         int i;
 395         struct i2c_client *client;
 396         struct saa7185 *encoder;
 397
 398         dprintk(1,
 399                 KERN_INFO
 400                 "saa7185.c: detecting saa7185 client on address 0x%x\n",
 401                 address << 1);
 402
 403         /* Check if the adapter supports the needed features */
 404         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 405                 return 0;
 406
 407         client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
 408         if (client == 0)
 409                 return -ENOMEM;
 410         client->addr = address;
 411         client->adapter = adapter;
 412         client->driver = &i2c_driver_saa7185;
 413         strlcpy(I2C_NAME(client), "saa7185", sizeof(I2C_NAME(client)));
 414
 415         encoder = kzalloc(sizeof(struct saa7185), GFP_KERNEL);
 416         if (encoder == NULL) {
 417                 kfree(client);
 418                 return -ENOMEM;
 419         }
 420         encoder->norm = VIDEO_MODE_NTSC;
 421         encoder->enable = 1;
 422         i2c_set_clientdata(client, encoder);
 423
 424         i = i2c_attach_client(client);
 425         if (i) {
 426                 kfree(client);
 427                 kfree(encoder);
 428                 return i;
 429         }
 430
 431         i = saa7185_write_block(client, init_common, sizeof(init_common));
 432         if (i >= 0) {
 433                 i = saa7185_write_block(client, init_ntsc,
 434                                         sizeof(init_ntsc));
 435         }
 436         if (i < 0) {
 437                 dprintk(1, KERN_ERR "%s_attach: init error %d\n",
 438                         I2C_NAME(client), i);
 439         } else {
 440                 dprintk(1,
 441                         KERN_INFO
 442                         "%s_attach: chip version %d at address 0x%x\n",
 443                         I2C_NAME(client), saa7185_read(client) >> 5,
 444                         client->addr << 1);
 445         }
 446
 447         return 0;
 448 }
 449
 450 static int
 451 saa7185_attach_adapter (struct i2c_adapter *adapter)
 452 {
 453         dprintk(1,
 454                 KERN_INFO
 455                 "saa7185.c: starting probe for adapter %s (0x%x)\n",
 456                 I2C_NAME(adapter), adapter->id);
 457         return i2c_probe(adapter, &addr_data, &saa7185_detect_client);
 458 }
 459
 460 static int
 461 saa7185_detach_client (struct i2c_client *client)
 462 {
 463         struct saa7185 *encoder = i2c_get_clientdata(client);
 464         int err;
 465
 466         err = i2c_detach_client(client);
 467         if (err) {
 468                 return err;
 469         }
 470
 471         saa7185_write(client, 0x61, (encoder->reg[0x61]) | 0x40);       /* SW: output off is active */
 472         //saa7185_write(client, 0x3a, (encoder->reg[0x3a]) | 0x80); /* SW: color bar */
 473
 474         kfree(encoder);
 475         kfree(client);
 476
 477         return 0;
 478 }
 479
 480 /* ----------------------------------------------------------------------- */
 481
 482 static struct i2c_driver i2c_driver_saa7185 = {
 483         .driver = {
 484                 .name = "saa7185",      /* name */
 485         },
 486
 487         .id = I2C_DRIVERID_SAA7185B,
 488
 489         .attach_adapter = saa7185_attach_adapter,
 490         .detach_client = saa7185_detach_client,
 491         .command = saa7185_command,
 492 };
 493
 494 static int __init
 495 saa7185_init (void)
 496 {
 497         return i2c_add_driver(&i2c_driver_saa7185);
 498 }
 499
 500 static void __exit
 501 saa7185_exit (void)
 502 {
 503         i2c_del_driver(&i2c_driver_saa7185);
 504 }
 505
 506 module_init(saa7185_init);
 507 module_exit(saa7185_exit);