git.oblomov.eu Git - linux-2.6/blob - 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/signal.h>
  37 #include <linux/types.h>
  38 #include <linux/i2c.h>
  39 #include <asm/io.h>
  40 #include <asm/pgtable.h>
  41 #include <asm/page.h>
  42 #include <asm/uaccess.h>
  43
  44 #include <linux/videodev.h>
  45 #include <linux/video_encoder.h>
  46
  47 MODULE_DESCRIPTION("Philips SAA7185 video encoder driver");
  48 MODULE_AUTHOR("Dave Perks");
  49 MODULE_LICENSE("GPL");
  50
  51
  52 #define I2C_NAME(s) (s)->name
  53
  54
  55 static int debug;
  56 module_param(debug, int, 0);
  57 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  58
  59 #define dprintk(num, format, args...) \
  60         do { \
  61                 if (debug >= num) \
  62                         printk(format, ##args); \
  63         } while (0)
  64
  65 /* ----------------------------------------------------------------------- */
  66
  67 struct saa7185 {
  68         unsigned char reg[128];
  69
  70         int norm;
  71         int enable;
  72         int bright;
  73         int contrast;
  74         int hue;
  75         int sat;
  76 };
  77
  78 #define   I2C_SAA7185        0x88
  79
  80 /* ----------------------------------------------------------------------- */
  81
  82 static inline int
  83 saa7185_read (struct i2c_client *client)
  84 {
  85         return i2c_smbus_read_byte(client);
  86 }
  87
  88 static int
  89 saa7185_write (struct i2c_client *client,
  90                u8                 reg,
  91                u8                 value)
  92 {
  93         struct saa7185 *encoder = i2c_get_clientdata(client);
  94
  95         dprintk(1, KERN_DEBUG "SAA7185: %02x set to %02x\n", reg, value);
  96         encoder->reg[reg] = value;
  97         return i2c_smbus_write_byte_data(client, reg, value);
  98 }
  99
 100 static int
 101 saa7185_write_block (struct i2c_client *client,
 102                      const u8          *data,
 103                      unsigned int       len)
 104 {
 105         int ret = -1;
 106         u8 reg;
 107
 108         /* the adv7175 has an autoincrement function, use it if
 109          * the adapter understands raw I2C */
 110         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 111                 /* do raw I2C, not smbus compatible */
 112                 struct saa7185 *encoder = i2c_get_clientdata(client);
 113                 u8 block_data[32];
 114                 int block_len;
 115
 116                 while (len >= 2) {
 117                         block_len = 0;
 118                         block_data[block_len++] = reg = data[0];
 119                         do {
 120                                 block_data[block_len++] =
 121                                     encoder->reg[reg++] = data[1];
 122                                 len -= 2;
 123                                 data += 2;
 124                         } while (len >= 2 && data[0] == reg &&
 125                                  block_len < 32);
 126                         if ((ret = i2c_master_send(client, block_data,
 127                                                    block_len)) < 0)
 128                                 break;
 129                 }
 130         } else {
 131                 /* do some slow I2C emulation kind of thing */
 132                 while (len >= 2) {
 133                         reg = *data++;
 134                         if ((ret = saa7185_write(client, reg,
 135                                                  *data++)) < 0)
 136                                 break;
 137                         len -= 2;
 138                 }
 139         }
 140
 141         return ret;
 142 }
 143
 144 /* ----------------------------------------------------------------------- */
 145
 146 static const unsigned char init_common[] = {
 147         0x3a, 0x0f,             /* CBENB=0, V656=0, VY2C=1,
 148                                  * YUV2C=1, MY2C=1, MUV2C=1 */
 149
 150         0x42, 0x6b,             /* OVLY0=107 */
 151         0x43, 0x00,             /* OVLU0=0     white */
 152         0x44, 0x00,             /* OVLV0=0   */
 153         0x45, 0x22,             /* OVLY1=34  */
 154         0x46, 0xac,             /* OVLU1=172   yellow */
 155         0x47, 0x0e,             /* OVLV1=14  */
 156         0x48, 0x03,             /* OVLY2=3   */
 157         0x49, 0x1d,             /* OVLU2=29    cyan */
 158         0x4a, 0xac,             /* OVLV2=172 */
 159         0x4b, 0xf0,             /* OVLY3=240 */
 160         0x4c, 0xc8,             /* OVLU3=200   green */
 161         0x4d, 0xb9,             /* OVLV3=185 */
 162         0x4e, 0xd4,             /* OVLY4=212 */
 163         0x4f, 0x38,             /* OVLU4=56    magenta */
 164         0x50, 0x47,             /* OVLV4=71  */
 165         0x51, 0xc1,             /* OVLY5=193 */
 166         0x52, 0xe3,             /* OVLU5=227   red */
 167         0x53, 0x54,             /* OVLV5=84  */
 168         0x54, 0xa3,             /* OVLY6=163 */
 169         0x55, 0x54,             /* OVLU6=84    blue */
 170         0x56, 0xf2,             /* OVLV6=242 */
 171         0x57, 0x90,             /* OVLY7=144 */
 172         0x58, 0x00,             /* OVLU7=0     black */
 173         0x59, 0x00,             /* OVLV7=0   */
 174
 175         0x5a, 0x00,             /* CHPS=0    */
 176         0x5b, 0x76,             /* GAINU=118 */
 177         0x5c, 0xa5,             /* GAINV=165 */
 178         0x5d, 0x3c,             /* BLCKL=60  */
 179         0x5e, 0x3a,             /* BLNNL=58  */
 180         0x5f, 0x3a,             /* CCRS=0, BLNVB=58 */
 181         0x60, 0x00,             /* NULL      */
 182
 183         /* 0x61 - 0x66 set according to norm */
 184
 185         0x67, 0x00,             /* 0 : caption 1st byte odd  field */
 186         0x68, 0x00,             /* 0 : caption 2nd byte odd  field */
 187         0x69, 0x00,             /* 0 : caption 1st byte even field */
 188         0x6a, 0x00,             /* 0 : caption 2nd byte even field */
 189
 190         0x6b, 0x91,             /* MODIN=2, PCREF=0, SCCLN=17 */
 191         0x6c, 0x20,             /* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0,
 192                                  * CBLF=0, ORCV2=0, PRCV2=0 */
 193         0x6d, 0x00,             /* SRCM1=0, CCEN=0 */
 194
 195         0x6e, 0x0e,             /* HTRIG=0x005, approx. centered, at
 196                                  * least for PAL */
 197         0x6f, 0x00,             /* HTRIG upper bits */
 198         0x70, 0x20,             /* PHRES=0, SBLN=1, VTRIG=0 */
 199
 200         /* The following should not be needed */
 201
 202         0x71, 0x15,             /* BMRQ=0x115 */
 203         0x72, 0x90,             /* EMRQ=0x690 */
 204         0x73, 0x61,             /* EMRQ=0x690, BMRQ=0x115 */
 205         0x74, 0x00,             /* NULL       */
 206         0x75, 0x00,             /* NULL       */
 207         0x76, 0x00,             /* NULL       */
 208         0x77, 0x15,             /* BRCV=0x115 */
 209         0x78, 0x90,             /* ERCV=0x690 */
 210         0x79, 0x61,             /* ERCV=0x690, BRCV=0x115 */
 211
 212         /* Field length controls */
 213
 214         0x7a, 0x70,             /* FLC=0 */
 215
 216         /* The following should not be needed if SBLN = 1 */
 217
 218         0x7b, 0x16,             /* FAL=22 */
 219         0x7c, 0x35,             /* LAL=244 */
 220         0x7d, 0x20,             /* LAL=244, FAL=22 */
 221 };
 222
 223 static const unsigned char init_pal[] = {
 224         0x61, 0x1e,             /* FISE=0, PAL=1, SCBW=1, RTCE=1,
 225                                  * YGS=1, INPI=0, DOWN=0 */
 226         0x62, 0xc8,             /* DECTYP=1, BSTA=72 */
 227         0x63, 0xcb,             /* FSC0 */
 228         0x64, 0x8a,             /* FSC1 */
 229         0x65, 0x09,             /* FSC2 */
 230         0x66, 0x2a,             /* FSC3 */
 231 };
 232
 233 static const unsigned char init_ntsc[] = {
 234         0x61, 0x1d,             /* FISE=1, PAL=0, SCBW=1, RTCE=1,
 235                                  * YGS=1, INPI=0, DOWN=0 */
 236         0x62, 0xe6,             /* DECTYP=1, BSTA=102 */
 237         0x63, 0x1f,             /* FSC0 */
 238         0x64, 0x7c,             /* FSC1 */
 239         0x65, 0xf0,             /* FSC2 */
 240         0x66, 0x21,             /* FSC3 */
 241 };
 242
 243 static int
 244 saa7185_command (struct i2c_client *client,
 245                  unsigned int       cmd,
 246                  void              *arg)
 247 {
 248         struct saa7185 *encoder = i2c_get_clientdata(client);
 249
 250         switch (cmd) {
 251
 252         case 0:
 253                 saa7185_write_block(client, init_common,
 254                                     sizeof(init_common));
 255                 switch (encoder->norm) {
 256
 257                 case VIDEO_MODE_NTSC:
 258                         saa7185_write_block(client, init_ntsc,
 259                                             sizeof(init_ntsc));
 260                         break;
 261
 262                 case VIDEO_MODE_PAL:
 263                         saa7185_write_block(client, init_pal,
 264                                             sizeof(init_pal));
 265                         break;
 266                 }
 267
 268                 break;
 269
 270         case ENCODER_GET_CAPABILITIES:
 271         {
 272                 struct video_encoder_capability *cap = arg;
 273
 274                 cap->flags =
 275                     VIDEO_ENCODER_PAL | VIDEO_ENCODER_NTSC |
 276                     VIDEO_ENCODER_SECAM | VIDEO_ENCODER_CCIR;
 277                 cap->inputs = 1;
 278                 cap->outputs = 1;
 279         }
 280                 break;
 281
 282         case ENCODER_SET_NORM:
 283         {
 284                 int *iarg = arg;
 285
 286                 //saa7185_write_block(client, init_common, sizeof(init_common));
 287
 288                 switch (*iarg) {
 289
 290                 case VIDEO_MODE_NTSC:
 291                         saa7185_write_block(client, init_ntsc,
 292                                             sizeof(init_ntsc));
 293                         break;
 294
 295                 case VIDEO_MODE_PAL:
 296                         saa7185_write_block(client, init_pal,
 297                                             sizeof(init_pal));
 298                         break;
 299
 300                 case VIDEO_MODE_SECAM:
 301                 default:
 302                         return -EINVAL;
 303
 304                 }
 305                 encoder->norm = *iarg;
 306         }
 307                 break;
 308
 309         case ENCODER_SET_INPUT:
 310         {
 311                 int *iarg = arg;
 312
 313                 /* RJ: *iarg = 0: input is from SA7111
 314                  *iarg = 1: input is from ZR36060 */
 315
 316                 switch (*iarg) {
 317
 318                 case 0:
 319                         /* Switch RTCE to 1 */
 320                         saa7185_write(client, 0x61,
 321                                       (encoder->reg[0x61] & 0xf7) | 0x08);
 322                         saa7185_write(client, 0x6e, 0x01);
 323                         break;
 324
 325                 case 1:
 326                         /* Switch RTCE to 0 */
 327                         saa7185_write(client, 0x61,
 328                                       (encoder->reg[0x61] & 0xf7) | 0x00);
 329                         /* SW: a slight sync problem... */
 330                         saa7185_write(client, 0x6e, 0x00);
 331                         break;
 332
 333                 default:
 334                         return -EINVAL;
 335
 336                 }
 337         }
 338                 break;
 339
 340         case ENCODER_SET_OUTPUT:
 341         {
 342                 int *iarg = arg;
 343
 344                 /* not much choice of outputs */
 345                 if (*iarg != 0) {
 346                         return -EINVAL;
 347                 }
 348         }
 349                 break;
 350
 351         case ENCODER_ENABLE_OUTPUT:
 352         {
 353                 int *iarg = arg;
 354
 355                 encoder->enable = !!*iarg;
 356                 saa7185_write(client, 0x61,
 357                               (encoder->reg[0x61] & 0xbf) |
 358                               (encoder->enable ? 0x00 : 0x40));
 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[] = { I2C_SAA7185 >> 1, I2C_CLIENT_END };
 376
 377 static unsigned short ignore = I2C_CLIENT_END;
 378
 379 static struct i2c_client_address_data addr_data = {
 380         .normal_i2c             = normal_i2c,
 381         .probe                  = &ignore,
 382         .ignore                 = &ignore,
 383 };
 384
 385 static struct i2c_driver i2c_driver_saa7185;
 386
 387 static int
 388 saa7185_detect_client (struct i2c_adapter *adapter,
 389                        int                 address,
 390                        int                 kind)
 391 {
 392         int i;
 393         struct i2c_client *client;
 394         struct saa7185 *encoder;
 395
 396         dprintk(1,
 397                 KERN_INFO
 398                 "saa7185.c: detecting saa7185 client on address 0x%x\n",
 399                 address << 1);
 400
 401         /* Check if the adapter supports the needed features */
 402         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 403                 return 0;
 404
 405         client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
 406         if (!client)
 407                 return -ENOMEM;
 408         client->addr = address;
 409         client->adapter = adapter;
 410         client->driver = &i2c_driver_saa7185;
 411         strlcpy(I2C_NAME(client), "saa7185", sizeof(I2C_NAME(client)));
 412
 413         encoder = kzalloc(sizeof(struct saa7185), GFP_KERNEL);
 414         if (encoder == NULL) {
 415                 kfree(client);
 416                 return -ENOMEM;
 417         }
 418         encoder->norm = VIDEO_MODE_NTSC;
 419         encoder->enable = 1;
 420         i2c_set_clientdata(client, encoder);
 421
 422         i = i2c_attach_client(client);
 423         if (i) {
 424                 kfree(client);
 425                 kfree(encoder);
 426                 return i;
 427         }
 428
 429         i = saa7185_write_block(client, init_common, sizeof(init_common));
 430         if (i >= 0) {
 431                 i = saa7185_write_block(client, init_ntsc,
 432                                         sizeof(init_ntsc));
 433         }
 434         if (i < 0) {
 435                 dprintk(1, KERN_ERR "%s_attach: init error %d\n",
 436                         I2C_NAME(client), i);
 437         } else {
 438                 dprintk(1,
 439                         KERN_INFO
 440                         "%s_attach: chip version %d at address 0x%x\n",
 441                         I2C_NAME(client), saa7185_read(client) >> 5,
 442                         client->addr << 1);
 443         }
 444
 445         return 0;
 446 }
 447
 448 static int
 449 saa7185_attach_adapter (struct i2c_adapter *adapter)
 450 {
 451         dprintk(1,
 452                 KERN_INFO
 453                 "saa7185.c: starting probe for adapter %s (0x%x)\n",
 454                 I2C_NAME(adapter), adapter->id);
 455         return i2c_probe(adapter, &addr_data, &saa7185_detect_client);
 456 }
 457
 458 static int
 459 saa7185_detach_client (struct i2c_client *client)
 460 {
 461         struct saa7185 *encoder = i2c_get_clientdata(client);
 462         int err;
 463
 464         err = i2c_detach_client(client);
 465         if (err) {
 466                 return err;
 467         }
 468
 469         saa7185_write(client, 0x61, (encoder->reg[0x61]) | 0x40);       /* SW: output off is active */
 470         //saa7185_write(client, 0x3a, (encoder->reg[0x3a]) | 0x80); /* SW: color bar */
 471
 472         kfree(encoder);
 473         kfree(client);
 474
 475         return 0;
 476 }
 477
 478 /* ----------------------------------------------------------------------- */
 479
 480 static struct i2c_driver i2c_driver_saa7185 = {
 481         .driver = {
 482                 .name = "saa7185",      /* name */
 483         },
 484
 485         .id = I2C_DRIVERID_SAA7185B,
 486
 487         .attach_adapter = saa7185_attach_adapter,
 488         .detach_client = saa7185_detach_client,
 489         .command = saa7185_command,
 490 };
 491
 492 static int __init
 493 saa7185_init (void)
 494 {
 495         return i2c_add_driver(&i2c_driver_saa7185);
 496 }
 497
 498 static void __exit
 499 saa7185_exit (void)
 500 {
 501         i2c_del_driver(&i2c_driver_saa7185);
 502 }
 503
 504 module_init(saa7185_init);
 505 module_exit(saa7185_exit);