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 #include <linux/i2c-dev.h>
  53
  54 #define I2C_NAME(s) (s)->name
  55
  56 #include <linux/video_encoder.h>
  57
  58 static int debug = 0;
  59 module_param(debug, int, 0);
  60 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  61
  62 #define dprintk(num, format, args...) \
  63         do { \
  64                 if (debug >= num) \
  65                         printk(format, ##args); \
  66         } while (0)
  67
  68 /* ----------------------------------------------------------------------- */
  69
  70 struct saa7185 {
  71         unsigned char reg[128];
  72
  73         int norm;
  74         int enable;
  75         int bright;
  76         int contrast;
  77         int hue;
  78         int sat;
  79 };
  80
  81 #define   I2C_SAA7185        0x88
  82
  83 /* ----------------------------------------------------------------------- */
  84
  85 static inline int
  86 saa7185_read (struct i2c_client *client)
  87 {
  88         return i2c_smbus_read_byte(client);
  89 }
  90
  91 static int
  92 saa7185_write (struct i2c_client *client,
  93                u8                 reg,
  94                u8                 value)
  95 {
  96         struct saa7185 *encoder = i2c_get_clientdata(client);
  97
  98         dprintk(1, KERN_DEBUG "SAA7185: %02x set to %02x\n", reg, value);
  99         encoder->reg[reg] = value;
 100         return i2c_smbus_write_byte_data(client, reg, value);
 101 }
 102
 103 static int
 104 saa7185_write_block (struct i2c_client *client,
 105                      const u8          *data,
 106                      unsigned int       len)
 107 {
 108         int ret = -1;
 109         u8 reg;
 110
 111         /* the adv7175 has an autoincrement function, use it if
 112          * the adapter understands raw I2C */
 113         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 114                 /* do raw I2C, not smbus compatible */
 115                 struct saa7185 *encoder = i2c_get_clientdata(client);
 116                 u8 block_data[32];
 117                 int block_len;
 118
 119                 while (len >= 2) {
 120                         block_len = 0;
 121                         block_data[block_len++] = reg = data[0];
 122                         do {
 123                                 block_data[block_len++] =
 124                                     encoder->reg[reg++] = data[1];
 125                                 len -= 2;
 126                                 data += 2;
 127                         } while (len >= 2 && data[0] == reg &&
 128                                  block_len < 32);
 129                         if ((ret = i2c_master_send(client, block_data,
 130                                                    block_len)) < 0)
 131                                 break;
 132                 }
 133         } else {
 134                 /* do some slow I2C emulation kind of thing */
 135                 while (len >= 2) {
 136                         reg = *data++;
 137                         if ((ret = saa7185_write(client, reg,
 138                                                  *data++)) < 0)
 139                                 break;
 140                         len -= 2;
 141                 }
 142         }
 143
 144         return ret;
 145 }
 146
 147 /* ----------------------------------------------------------------------- */
 148
 149 static const unsigned char init_common[] = {
 150         0x3a, 0x0f,             /* CBENB=0, V656=0, VY2C=1,
 151                                  * YUV2C=1, MY2C=1, MUV2C=1 */
 152
 153         0x42, 0x6b,             /* OVLY0=107 */
 154         0x43, 0x00,             /* OVLU0=0     white */
 155         0x44, 0x00,             /* OVLV0=0   */
 156         0x45, 0x22,             /* OVLY1=34  */
 157         0x46, 0xac,             /* OVLU1=172   yellow */
 158         0x47, 0x0e,             /* OVLV1=14  */
 159         0x48, 0x03,             /* OVLY2=3   */
 160         0x49, 0x1d,             /* OVLU2=29    cyan */
 161         0x4a, 0xac,             /* OVLV2=172 */
 162         0x4b, 0xf0,             /* OVLY3=240 */
 163         0x4c, 0xc8,             /* OVLU3=200   green */
 164         0x4d, 0xb9,             /* OVLV3=185 */
 165         0x4e, 0xd4,             /* OVLY4=212 */
 166         0x4f, 0x38,             /* OVLU4=56    magenta */
 167         0x50, 0x47,             /* OVLV4=71  */
 168         0x51, 0xc1,             /* OVLY5=193 */
 169         0x52, 0xe3,             /* OVLU5=227   red */
 170         0x53, 0x54,             /* OVLV5=84  */
 171         0x54, 0xa3,             /* OVLY6=163 */
 172         0x55, 0x54,             /* OVLU6=84    blue */
 173         0x56, 0xf2,             /* OVLV6=242 */
 174         0x57, 0x90,             /* OVLY7=144 */
 175         0x58, 0x00,             /* OVLU7=0     black */
 176         0x59, 0x00,             /* OVLV7=0   */
 177
 178         0x5a, 0x00,             /* CHPS=0    */
 179         0x5b, 0x76,             /* GAINU=118 */
 180         0x5c, 0xa5,             /* GAINV=165 */
 181         0x5d, 0x3c,             /* BLCKL=60  */
 182         0x5e, 0x3a,             /* BLNNL=58  */
 183         0x5f, 0x3a,             /* CCRS=0, BLNVB=58 */
 184         0x60, 0x00,             /* NULL      */
 185
 186         /* 0x61 - 0x66 set according to norm */
 187
 188         0x67, 0x00,             /* 0 : caption 1st byte odd  field */
 189         0x68, 0x00,             /* 0 : caption 2nd byte odd  field */
 190         0x69, 0x00,             /* 0 : caption 1st byte even field */
 191         0x6a, 0x00,             /* 0 : caption 2nd byte even field */
 192
 193         0x6b, 0x91,             /* MODIN=2, PCREF=0, SCCLN=17 */
 194         0x6c, 0x20,             /* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0,
 195                                  * CBLF=0, ORCV2=0, PRCV2=0 */
 196         0x6d, 0x00,             /* SRCM1=0, CCEN=0 */
 197
 198         0x6e, 0x0e,             /* HTRIG=0x005, approx. centered, at
 199                                  * least for PAL */
 200         0x6f, 0x00,             /* HTRIG upper bits */
 201         0x70, 0x20,             /* PHRES=0, SBLN=1, VTRIG=0 */
 202
 203         /* The following should not be needed */
 204
 205         0x71, 0x15,             /* BMRQ=0x115 */
 206         0x72, 0x90,             /* EMRQ=0x690 */
 207         0x73, 0x61,             /* EMRQ=0x690, BMRQ=0x115 */
 208         0x74, 0x00,             /* NULL       */
 209         0x75, 0x00,             /* NULL       */
 210         0x76, 0x00,             /* NULL       */
 211         0x77, 0x15,             /* BRCV=0x115 */
 212         0x78, 0x90,             /* ERCV=0x690 */
 213         0x79, 0x61,             /* ERCV=0x690, BRCV=0x115 */
 214
 215         /* Field length controls */
 216
 217         0x7a, 0x70,             /* FLC=0 */
 218
 219         /* The following should not be needed if SBLN = 1 */
 220
 221         0x7b, 0x16,             /* FAL=22 */
 222         0x7c, 0x35,             /* LAL=244 */
 223         0x7d, 0x20,             /* LAL=244, FAL=22 */
 224 };
 225
 226 static const unsigned char init_pal[] = {
 227         0x61, 0x1e,             /* FISE=0, PAL=1, SCBW=1, RTCE=1,
 228                                  * YGS=1, INPI=0, DOWN=0 */
 229         0x62, 0xc8,             /* DECTYP=1, BSTA=72 */
 230         0x63, 0xcb,             /* FSC0 */
 231         0x64, 0x8a,             /* FSC1 */
 232         0x65, 0x09,             /* FSC2 */
 233         0x66, 0x2a,             /* FSC3 */
 234 };
 235
 236 static const unsigned char init_ntsc[] = {
 237         0x61, 0x1d,             /* FISE=1, PAL=0, SCBW=1, RTCE=1,
 238                                  * YGS=1, INPI=0, DOWN=0 */
 239         0x62, 0xe6,             /* DECTYP=1, BSTA=102 */
 240         0x63, 0x1f,             /* FSC0 */
 241         0x64, 0x7c,             /* FSC1 */
 242         0x65, 0xf0,             /* FSC2 */
 243         0x66, 0x21,             /* FSC3 */
 244 };
 245
 246 static int
 247 saa7185_command (struct i2c_client *client,
 248                  unsigned int       cmd,
 249                  void              *arg)
 250 {
 251         struct saa7185 *encoder = i2c_get_clientdata(client);
 252
 253         switch (cmd) {
 254
 255         case 0:
 256                 saa7185_write_block(client, init_common,
 257                                     sizeof(init_common));
 258                 switch (encoder->norm) {
 259
 260                 case VIDEO_MODE_NTSC:
 261                         saa7185_write_block(client, init_ntsc,
 262                                             sizeof(init_ntsc));
 263                         break;
 264
 265                 case VIDEO_MODE_PAL:
 266                         saa7185_write_block(client, init_pal,
 267                                             sizeof(init_pal));
 268                         break;
 269                 }
 270
 271                 break;
 272
 273         case ENCODER_GET_CAPABILITIES:
 274         {
 275                 struct video_encoder_capability *cap = arg;
 276
 277                 cap->flags =
 278                     VIDEO_ENCODER_PAL | VIDEO_ENCODER_NTSC |
 279                     VIDEO_ENCODER_SECAM | VIDEO_ENCODER_CCIR;
 280                 cap->inputs = 1;
 281                 cap->outputs = 1;
 282         }
 283                 break;
 284
 285         case ENCODER_SET_NORM:
 286         {
 287                 int *iarg = arg;
 288
 289                 //saa7185_write_block(client, init_common, sizeof(init_common));
 290
 291                 switch (*iarg) {
 292
 293                 case VIDEO_MODE_NTSC:
 294                         saa7185_write_block(client, init_ntsc,
 295                                             sizeof(init_ntsc));
 296                         break;
 297
 298                 case VIDEO_MODE_PAL:
 299                         saa7185_write_block(client, init_pal,
 300                                             sizeof(init_pal));
 301                         break;
 302
 303                 case VIDEO_MODE_SECAM:
 304                 default:
 305                         return -EINVAL;
 306
 307                 }
 308                 encoder->norm = *iarg;
 309         }
 310                 break;
 311
 312         case ENCODER_SET_INPUT:
 313         {
 314                 int *iarg = arg;
 315
 316                 /* RJ: *iarg = 0: input is from SA7111
 317                  *iarg = 1: input is from ZR36060 */
 318
 319                 switch (*iarg) {
 320
 321                 case 0:
 322                         /* Switch RTCE to 1 */
 323                         saa7185_write(client, 0x61,
 324                                       (encoder->reg[0x61] & 0xf7) | 0x08);
 325                         saa7185_write(client, 0x6e, 0x01);
 326                         break;
 327
 328                 case 1:
 329                         /* Switch RTCE to 0 */
 330                         saa7185_write(client, 0x61,
 331                                       (encoder->reg[0x61] & 0xf7) | 0x00);
 332                         /* SW: a slight sync problem... */
 333                         saa7185_write(client, 0x6e, 0x00);
 334                         break;
 335
 336                 default:
 337                         return -EINVAL;
 338
 339                 }
 340         }
 341                 break;
 342
 343         case ENCODER_SET_OUTPUT:
 344         {
 345                 int *iarg = arg;
 346
 347                 /* not much choice of outputs */
 348                 if (*iarg != 0) {
 349                         return -EINVAL;
 350                 }
 351         }
 352                 break;
 353
 354         case ENCODER_ENABLE_OUTPUT:
 355         {
 356                 int *iarg = arg;
 357
 358                 encoder->enable = !!*iarg;
 359                 saa7185_write(client, 0x61,
 360                               (encoder->reg[0x61] & 0xbf) |
 361                               (encoder->enable ? 0x00 : 0x40));
 362         }
 363                 break;
 364
 365         default:
 366                 return -EINVAL;
 367         }
 368
 369         return 0;
 370 }
 371
 372 /* ----------------------------------------------------------------------- */
 373
 374 /*
 375  * Generic i2c probe
 376  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
 377  */
 378 static unsigned short normal_i2c[] = { I2C_SAA7185 >> 1, I2C_CLIENT_END };
 379
 380 static unsigned short ignore = I2C_CLIENT_END;
 381
 382 static struct i2c_client_address_data addr_data = {
 383         .normal_i2c             = normal_i2c,
 384         .probe                  = &ignore,
 385         .ignore                 = &ignore,
 386 };
 387
 388 static struct i2c_driver i2c_driver_saa7185;
 389
 390 static int
 391 saa7185_detect_client (struct i2c_adapter *adapter,
 392                        int                 address,
 393                        int                 kind)
 394 {
 395         int i;
 396         struct i2c_client *client;
 397         struct saa7185 *encoder;
 398
 399         dprintk(1,
 400                 KERN_INFO
 401                 "saa7185.c: detecting saa7185 client on address 0x%x\n",
 402                 address << 1);
 403
 404         /* Check if the adapter supports the needed features */
 405         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 406                 return 0;
 407
 408         client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
 409         if (client == 0)
 410                 return -ENOMEM;
 411         client->addr = address;
 412         client->adapter = adapter;
 413         client->driver = &i2c_driver_saa7185;
 414         strlcpy(I2C_NAME(client), "saa7185", sizeof(I2C_NAME(client)));
 415
 416         encoder = kzalloc(sizeof(struct saa7185), GFP_KERNEL);
 417         if (encoder == NULL) {
 418                 kfree(client);
 419                 return -ENOMEM;
 420         }
 421         encoder->norm = VIDEO_MODE_NTSC;
 422         encoder->enable = 1;
 423         i2c_set_clientdata(client, encoder);
 424
 425         i = i2c_attach_client(client);
 426         if (i) {
 427                 kfree(client);
 428                 kfree(encoder);
 429                 return i;
 430         }
 431
 432         i = saa7185_write_block(client, init_common, sizeof(init_common));
 433         if (i >= 0) {
 434                 i = saa7185_write_block(client, init_ntsc,
 435                                         sizeof(init_ntsc));
 436         }
 437         if (i < 0) {
 438                 dprintk(1, KERN_ERR "%s_attach: init error %d\n",
 439                         I2C_NAME(client), i);
 440         } else {
 441                 dprintk(1,
 442                         KERN_INFO
 443                         "%s_attach: chip version %d at address 0x%x\n",
 444                         I2C_NAME(client), saa7185_read(client) >> 5,
 445                         client->addr << 1);
 446         }
 447
 448         return 0;
 449 }
 450
 451 static int
 452 saa7185_attach_adapter (struct i2c_adapter *adapter)
 453 {
 454         dprintk(1,
 455                 KERN_INFO
 456                 "saa7185.c: starting probe for adapter %s (0x%x)\n",
 457                 I2C_NAME(adapter), adapter->id);
 458         return i2c_probe(adapter, &addr_data, &saa7185_detect_client);
 459 }
 460
 461 static int
 462 saa7185_detach_client (struct i2c_client *client)
 463 {
 464         struct saa7185 *encoder = i2c_get_clientdata(client);
 465         int err;
 466
 467         err = i2c_detach_client(client);
 468         if (err) {
 469                 return err;
 470         }
 471
 472         saa7185_write(client, 0x61, (encoder->reg[0x61]) | 0x40);       /* SW: output off is active */
 473         //saa7185_write(client, 0x3a, (encoder->reg[0x3a]) | 0x80); /* SW: color bar */
 474
 475         kfree(encoder);
 476         kfree(client);
 477
 478         return 0;
 479 }
 480
 481 /* ----------------------------------------------------------------------- */
 482
 483 static struct i2c_driver i2c_driver_saa7185 = {
 484         .driver = {
 485                 .name = "saa7185",      /* name */
 486         },
 487
 488         .id = I2C_DRIVERID_SAA7185B,
 489
 490         .attach_adapter = saa7185_attach_adapter,
 491         .detach_client = saa7185_detach_client,
 492         .command = saa7185_command,
 493 };
 494
 495 static int __init
 496 saa7185_init (void)
 497 {
 498         return i2c_add_driver(&i2c_driver_saa7185);
 499 }
 500
 501 static void __exit
 502 saa7185_exit (void)
 503 {
 504         i2c_del_driver(&i2c_driver_saa7185);
 505 }
 506
 507 module_init(saa7185_init);
 508 module_exit(saa7185_exit);