err.no 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/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                 struct i2c_msg msg;
 116                 u8 block_data[32];
 117
 118                 msg.addr = client->addr;
 119                 msg.flags = 0;
 120                 while (len >= 2) {
 121                         msg.buf = (char *) block_data;
 122                         msg.len = 0;
 123                         block_data[msg.len++] = reg = data[0];
 124                         do {
 125                                 block_data[msg.len++] =
 126                                     encoder->reg[reg++] = data[1];
 127                                 len -= 2;
 128                                 data += 2;
 129                         } while (len >= 2 && data[0] == reg &&
 130                                  msg.len < 32);
 131                         if ((ret = i2c_transfer(client->adapter,
 132                                                 &msg, 1)) < 0)
 133                                 break;
 134                 }
 135         } else {
 136                 /* do some slow I2C emulation kind of thing */
 137                 while (len >= 2) {
 138                         reg = *data++;
 139                         if ((ret = saa7185_write(client, reg,
 140                                                  *data++)) < 0)
 141                                 break;
 142                         len -= 2;
 143                 }
 144         }
 145
 146         return ret;
 147 }
 148
 149 /* ----------------------------------------------------------------------- */
 150
 151 static const unsigned char init_common[] = {
 152         0x3a, 0x0f,             /* CBENB=0, V656=0, VY2C=1,
 153                                  * YUV2C=1, MY2C=1, MUV2C=1 */
 154
 155         0x42, 0x6b,             /* OVLY0=107 */
 156         0x43, 0x00,             /* OVLU0=0     white */
 157         0x44, 0x00,             /* OVLV0=0   */
 158         0x45, 0x22,             /* OVLY1=34  */
 159         0x46, 0xac,             /* OVLU1=172   yellow */
 160         0x47, 0x0e,             /* OVLV1=14  */
 161         0x48, 0x03,             /* OVLY2=3   */
 162         0x49, 0x1d,             /* OVLU2=29    cyan */
 163         0x4a, 0xac,             /* OVLV2=172 */
 164         0x4b, 0xf0,             /* OVLY3=240 */
 165         0x4c, 0xc8,             /* OVLU3=200   green */
 166         0x4d, 0xb9,             /* OVLV3=185 */
 167         0x4e, 0xd4,             /* OVLY4=212 */
 168         0x4f, 0x38,             /* OVLU4=56    magenta */
 169         0x50, 0x47,             /* OVLV4=71  */
 170         0x51, 0xc1,             /* OVLY5=193 */
 171         0x52, 0xe3,             /* OVLU5=227   red */
 172         0x53, 0x54,             /* OVLV5=84  */
 173         0x54, 0xa3,             /* OVLY6=163 */
 174         0x55, 0x54,             /* OVLU6=84    blue */
 175         0x56, 0xf2,             /* OVLV6=242 */
 176         0x57, 0x90,             /* OVLY7=144 */
 177         0x58, 0x00,             /* OVLU7=0     black */
 178         0x59, 0x00,             /* OVLV7=0   */
 179
 180         0x5a, 0x00,             /* CHPS=0    */
 181         0x5b, 0x76,             /* GAINU=118 */
 182         0x5c, 0xa5,             /* GAINV=165 */
 183         0x5d, 0x3c,             /* BLCKL=60  */
 184         0x5e, 0x3a,             /* BLNNL=58  */
 185         0x5f, 0x3a,             /* CCRS=0, BLNVB=58 */
 186         0x60, 0x00,             /* NULL      */
 187
 188         /* 0x61 - 0x66 set according to norm */
 189
 190         0x67, 0x00,             /* 0 : caption 1st byte odd  field */
 191         0x68, 0x00,             /* 0 : caption 2nd byte odd  field */
 192         0x69, 0x00,             /* 0 : caption 1st byte even field */
 193         0x6a, 0x00,             /* 0 : caption 2nd byte even field */
 194
 195         0x6b, 0x91,             /* MODIN=2, PCREF=0, SCCLN=17 */
 196         0x6c, 0x20,             /* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0,
 197                                  * CBLF=0, ORCV2=0, PRCV2=0 */
 198         0x6d, 0x00,             /* SRCM1=0, CCEN=0 */
 199
 200         0x6e, 0x0e,             /* HTRIG=0x005, approx. centered, at
 201                                  * least for PAL */
 202         0x6f, 0x00,             /* HTRIG upper bits */
 203         0x70, 0x20,             /* PHRES=0, SBLN=1, VTRIG=0 */
 204
 205         /* The following should not be needed */
 206
 207         0x71, 0x15,             /* BMRQ=0x115 */
 208         0x72, 0x90,             /* EMRQ=0x690 */
 209         0x73, 0x61,             /* EMRQ=0x690, BMRQ=0x115 */
 210         0x74, 0x00,             /* NULL       */
 211         0x75, 0x00,             /* NULL       */
 212         0x76, 0x00,             /* NULL       */
 213         0x77, 0x15,             /* BRCV=0x115 */
 214         0x78, 0x90,             /* ERCV=0x690 */
 215         0x79, 0x61,             /* ERCV=0x690, BRCV=0x115 */
 216
 217         /* Field length controls */
 218
 219         0x7a, 0x70,             /* FLC=0 */
 220
 221         /* The following should not be needed if SBLN = 1 */
 222
 223         0x7b, 0x16,             /* FAL=22 */
 224         0x7c, 0x35,             /* LAL=244 */
 225         0x7d, 0x20,             /* LAL=244, FAL=22 */
 226 };
 227
 228 static const unsigned char init_pal[] = {
 229         0x61, 0x1e,             /* FISE=0, PAL=1, SCBW=1, RTCE=1,
 230                                  * YGS=1, INPI=0, DOWN=0 */
 231         0x62, 0xc8,             /* DECTYP=1, BSTA=72 */
 232         0x63, 0xcb,             /* FSC0 */
 233         0x64, 0x8a,             /* FSC1 */
 234         0x65, 0x09,             /* FSC2 */
 235         0x66, 0x2a,             /* FSC3 */
 236 };
 237
 238 static const unsigned char init_ntsc[] = {
 239         0x61, 0x1d,             /* FISE=1, PAL=0, SCBW=1, RTCE=1,
 240                                  * YGS=1, INPI=0, DOWN=0 */
 241         0x62, 0xe6,             /* DECTYP=1, BSTA=102 */
 242         0x63, 0x1f,             /* FSC0 */
 243         0x64, 0x7c,             /* FSC1 */
 244         0x65, 0xf0,             /* FSC2 */
 245         0x66, 0x21,             /* FSC3 */
 246 };
 247
 248 static int
 249 saa7185_command (struct i2c_client *client,
 250                  unsigned int       cmd,
 251                  void              *arg)
 252 {
 253         struct saa7185 *encoder = i2c_get_clientdata(client);
 254
 255         switch (cmd) {
 256
 257         case 0:
 258                 saa7185_write_block(client, init_common,
 259                                     sizeof(init_common));
 260                 switch (encoder->norm) {
 261
 262                 case VIDEO_MODE_NTSC:
 263                         saa7185_write_block(client, init_ntsc,
 264                                             sizeof(init_ntsc));
 265                         break;
 266
 267                 case VIDEO_MODE_PAL:
 268                         saa7185_write_block(client, init_pal,
 269                                             sizeof(init_pal));
 270                         break;
 271                 }
 272
 273                 break;
 274
 275         case ENCODER_GET_CAPABILITIES:
 276         {
 277                 struct video_encoder_capability *cap = arg;
 278
 279                 cap->flags =
 280                     VIDEO_ENCODER_PAL | VIDEO_ENCODER_NTSC |
 281                     VIDEO_ENCODER_SECAM | VIDEO_ENCODER_CCIR;
 282                 cap->inputs = 1;
 283                 cap->outputs = 1;
 284         }
 285                 break;
 286
 287         case ENCODER_SET_NORM:
 288         {
 289                 int *iarg = arg;
 290
 291                 //saa7185_write_block(client, init_common, sizeof(init_common));
 292
 293                 switch (*iarg) {
 294
 295                 case VIDEO_MODE_NTSC:
 296                         saa7185_write_block(client, init_ntsc,
 297                                             sizeof(init_ntsc));
 298                         break;
 299
 300                 case VIDEO_MODE_PAL:
 301                         saa7185_write_block(client, init_pal,
 302                                             sizeof(init_pal));
 303                         break;
 304
 305                 case VIDEO_MODE_SECAM:
 306                 default:
 307                         return -EINVAL;
 308
 309                 }
 310                 encoder->norm = *iarg;
 311         }
 312                 break;
 313
 314         case ENCODER_SET_INPUT:
 315         {
 316                 int *iarg = arg;
 317
 318                 /* RJ: *iarg = 0: input is from SA7111
 319                  *iarg = 1: input is from ZR36060 */
 320
 321                 switch (*iarg) {
 322
 323                 case 0:
 324                         /* Switch RTCE to 1 */
 325                         saa7185_write(client, 0x61,
 326                                       (encoder->reg[0x61] & 0xf7) | 0x08);
 327                         saa7185_write(client, 0x6e, 0x01);
 328                         break;
 329
 330                 case 1:
 331                         /* Switch RTCE to 0 */
 332                         saa7185_write(client, 0x61,
 333                                       (encoder->reg[0x61] & 0xf7) | 0x00);
 334                         /* SW: a slight sync problem... */
 335                         saa7185_write(client, 0x6e, 0x00);
 336                         break;
 337
 338                 default:
 339                         return -EINVAL;
 340
 341                 }
 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                 saa7185_write(client, 0x61,
 362                               (encoder->reg[0x61] & 0xbf) |
 363                               (encoder->enable ? 0x00 : 0x40));
 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[] = { I2C_SAA7185 >> 1, I2C_CLIENT_END };
 381
 382 static unsigned short ignore = I2C_CLIENT_END;
 383
 384 static struct i2c_client_address_data addr_data = {
 385         .normal_i2c             = normal_i2c,
 386         .probe                  = &ignore,
 387         .ignore                 = &ignore,
 388 };
 389
 390 static struct i2c_driver i2c_driver_saa7185;
 391
 392 static int
 393 saa7185_detect_client (struct i2c_adapter *adapter,
 394                        int                 address,
 395                        int                 kind)
 396 {
 397         int i;
 398         struct i2c_client *client;
 399         struct saa7185 *encoder;
 400
 401         dprintk(1,
 402                 KERN_INFO
 403                 "saa7185.c: detecting saa7185 client on address 0x%x\n",
 404                 address << 1);
 405
 406         /* Check if the adapter supports the needed features */
 407         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 408                 return 0;
 409
 410         client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
 411         if (client == 0)
 412                 return -ENOMEM;
 413         client->addr = address;
 414         client->adapter = adapter;
 415         client->driver = &i2c_driver_saa7185;
 416         strlcpy(I2C_NAME(client), "saa7185", sizeof(I2C_NAME(client)));
 417
 418         encoder = kzalloc(sizeof(struct saa7185), GFP_KERNEL);
 419         if (encoder == NULL) {
 420                 kfree(client);
 421                 return -ENOMEM;
 422         }
 423         encoder->norm = VIDEO_MODE_NTSC;
 424         encoder->enable = 1;
 425         i2c_set_clientdata(client, encoder);
 426
 427         i = i2c_attach_client(client);
 428         if (i) {
 429                 kfree(client);
 430                 kfree(encoder);
 431                 return i;
 432         }
 433
 434         i = saa7185_write_block(client, init_common, sizeof(init_common));
 435         if (i >= 0) {
 436                 i = saa7185_write_block(client, init_ntsc,
 437                                         sizeof(init_ntsc));
 438         }
 439         if (i < 0) {
 440                 dprintk(1, KERN_ERR "%s_attach: init error %d\n",
 441                         I2C_NAME(client), i);
 442         } else {
 443                 dprintk(1,
 444                         KERN_INFO
 445                         "%s_attach: chip version %d at address 0x%x\n",
 446                         I2C_NAME(client), saa7185_read(client) >> 5,
 447                         client->addr << 1);
 448         }
 449
 450         return 0;
 451 }
 452
 453 static int
 454 saa7185_attach_adapter (struct i2c_adapter *adapter)
 455 {
 456         dprintk(1,
 457                 KERN_INFO
 458                 "saa7185.c: starting probe for adapter %s (0x%x)\n",
 459                 I2C_NAME(adapter), adapter->id);
 460         return i2c_probe(adapter, &addr_data, &saa7185_detect_client);
 461 }
 462
 463 static int
 464 saa7185_detach_client (struct i2c_client *client)
 465 {
 466         struct saa7185 *encoder = i2c_get_clientdata(client);
 467         int err;
 468
 469         err = i2c_detach_client(client);
 470         if (err) {
 471                 return err;
 472         }
 473
 474         saa7185_write(client, 0x61, (encoder->reg[0x61]) | 0x40);       /* SW: output off is active */
 475         //saa7185_write(client, 0x3a, (encoder->reg[0x3a]) | 0x80); /* SW: color bar */
 476
 477         kfree(encoder);
 478         kfree(client);
 479
 480         return 0;
 481 }
 482
 483 /* ----------------------------------------------------------------------- */
 484
 485 static struct i2c_driver i2c_driver_saa7185 = {
 486         .driver = {
 487                 .name = "saa7185",      /* name */
 488         },
 489
 490         .id = I2C_DRIVERID_SAA7185B,
 491
 492         .attach_adapter = saa7185_attach_adapter,
 493         .detach_client = saa7185_detach_client,
 494         .command = saa7185_command,
 495 };
 496
 497 static int __init
 498 saa7185_init (void)
 499 {
 500         return i2c_add_driver(&i2c_driver_saa7185);
 501 }
 502
 503 static void __exit
 504 saa7185_exit (void)
 505 {
 506         i2c_del_driver(&i2c_driver_saa7185);
 507 }
 508
 509 module_init(saa7185_init);
 510 module_exit(saa7185_exit);