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/types.h>
  42
  43 #include <linux/videodev.h>
  44 #include <asm/uaccess.h>
  45
  46 MODULE_DESCRIPTION("Philips SAA7185 video encoder driver");
  47 MODULE_AUTHOR("Dave Perks");
  48 MODULE_LICENSE("GPL");
  49
  50 #include <linux/i2c.h>
  51
  52 #define I2C_NAME(s) (s)->name
  53
  54 #include <linux/video_encoder.h>
  55
  56 static int debug = 0;
  57 module_param(debug, int, 0);
  58 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  59
  60 #define dprintk(num, format, args...) \
  61         do { \
  62                 if (debug >= num) \
  63                         printk(format, ##args); \
  64         } while (0)
  65
  66 /* ----------------------------------------------------------------------- */
  67
  68 struct saa7185 {
  69         unsigned char reg[128];
  70
  71         int norm;
  72         int enable;
  73         int bright;
  74         int contrast;
  75         int hue;
  76         int sat;
  77 };
  78
  79 #define   I2C_SAA7185        0x88
  80
  81 /* ----------------------------------------------------------------------- */
  82
  83 static inline int
  84 saa7185_read (struct i2c_client *client)
  85 {
  86         return i2c_smbus_read_byte(client);
  87 }
  88
  89 static int
  90 saa7185_write (struct i2c_client *client,
  91                u8                 reg,
  92                u8                 value)
  93 {
  94         struct saa7185 *encoder = i2c_get_clientdata(client);
  95
  96         dprintk(1, KERN_DEBUG "SAA7185: %02x set to %02x\n", reg, value);
  97         encoder->reg[reg] = value;
  98         return i2c_smbus_write_byte_data(client, reg, value);
  99 }
 100
 101 static int
 102 saa7185_write_block (struct i2c_client *client,
 103                      const u8          *data,
 104                      unsigned int       len)
 105 {
 106         int ret = -1;
 107         u8 reg;
 108
 109         /* the adv7175 has an autoincrement function, use it if
 110          * the adapter understands raw I2C */
 111         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 112                 /* do raw I2C, not smbus compatible */
 113                 struct saa7185 *encoder = i2c_get_clientdata(client);
 114                 u8 block_data[32];
 115                 int block_len;
 116
 117                 while (len >= 2) {
 118                         block_len = 0;
 119                         block_data[block_len++] = reg = data[0];
 120                         do {
 121                                 block_data[block_len++] =
 122                                     encoder->reg[reg++] = data[1];
 123                                 len -= 2;
 124                                 data += 2;
 125                         } while (len >= 2 && data[0] == reg &&
 126                                  block_len < 32);
 127                         if ((ret = i2c_master_send(client, block_data,
 128                                                    block_len)) < 0)
 129                                 break;
 130                 }
 131         } else {
 132                 /* do some slow I2C emulation kind of thing */
 133                 while (len >= 2) {
 134                         reg = *data++;
 135                         if ((ret = saa7185_write(client, reg,
 136                                                  *data++)) < 0)
 137                                 break;
 138                         len -= 2;
 139                 }
 140         }
 141
 142         return ret;
 143 }
 144
 145 /* ----------------------------------------------------------------------- */
 146
 147 static const unsigned char init_common[] = {
 148         0x3a, 0x0f,             /* CBENB=0, V656=0, VY2C=1,
 149                                  * YUV2C=1, MY2C=1, MUV2C=1 */
 150
 151         0x42, 0x6b,             /* OVLY0=107 */
 152         0x43, 0x00,             /* OVLU0=0     white */
 153         0x44, 0x00,             /* OVLV0=0   */
 154         0x45, 0x22,             /* OVLY1=34  */
 155         0x46, 0xac,             /* OVLU1=172   yellow */
 156         0x47, 0x0e,             /* OVLV1=14  */
 157         0x48, 0x03,             /* OVLY2=3   */
 158         0x49, 0x1d,             /* OVLU2=29    cyan */
 159         0x4a, 0xac,             /* OVLV2=172 */
 160         0x4b, 0xf0,             /* OVLY3=240 */
 161         0x4c, 0xc8,             /* OVLU3=200   green */
 162         0x4d, 0xb9,             /* OVLV3=185 */
 163         0x4e, 0xd4,             /* OVLY4=212 */
 164         0x4f, 0x38,             /* OVLU4=56    magenta */
 165         0x50, 0x47,             /* OVLV4=71  */
 166         0x51, 0xc1,             /* OVLY5=193 */
 167         0x52, 0xe3,             /* OVLU5=227   red */
 168         0x53, 0x54,             /* OVLV5=84  */
 169         0x54, 0xa3,             /* OVLY6=163 */
 170         0x55, 0x54,             /* OVLU6=84    blue */
 171         0x56, 0xf2,             /* OVLV6=242 */
 172         0x57, 0x90,             /* OVLY7=144 */
 173         0x58, 0x00,             /* OVLU7=0     black */
 174         0x59, 0x00,             /* OVLV7=0   */
 175
 176         0x5a, 0x00,             /* CHPS=0    */
 177         0x5b, 0x76,             /* GAINU=118 */
 178         0x5c, 0xa5,             /* GAINV=165 */
 179         0x5d, 0x3c,             /* BLCKL=60  */
 180         0x5e, 0x3a,             /* BLNNL=58  */
 181         0x5f, 0x3a,             /* CCRS=0, BLNVB=58 */
 182         0x60, 0x00,             /* NULL      */
 183
 184         /* 0x61 - 0x66 set according to norm */
 185
 186         0x67, 0x00,             /* 0 : caption 1st byte odd  field */
 187         0x68, 0x00,             /* 0 : caption 2nd byte odd  field */
 188         0x69, 0x00,             /* 0 : caption 1st byte even field */
 189         0x6a, 0x00,             /* 0 : caption 2nd byte even field */
 190
 191         0x6b, 0x91,             /* MODIN=2, PCREF=0, SCCLN=17 */
 192         0x6c, 0x20,             /* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0,
 193                                  * CBLF=0, ORCV2=0, PRCV2=0 */
 194         0x6d, 0x00,             /* SRCM1=0, CCEN=0 */
 195
 196         0x6e, 0x0e,             /* HTRIG=0x005, approx. centered, at
 197                                  * least for PAL */
 198         0x6f, 0x00,             /* HTRIG upper bits */
 199         0x70, 0x20,             /* PHRES=0, SBLN=1, VTRIG=0 */
 200
 201         /* The following should not be needed */
 202
 203         0x71, 0x15,             /* BMRQ=0x115 */
 204         0x72, 0x90,             /* EMRQ=0x690 */
 205         0x73, 0x61,             /* EMRQ=0x690, BMRQ=0x115 */
 206         0x74, 0x00,             /* NULL       */
 207         0x75, 0x00,             /* NULL       */
 208         0x76, 0x00,             /* NULL       */
 209         0x77, 0x15,             /* BRCV=0x115 */
 210         0x78, 0x90,             /* ERCV=0x690 */
 211         0x79, 0x61,             /* ERCV=0x690, BRCV=0x115 */
 212
 213         /* Field length controls */
 214
 215         0x7a, 0x70,             /* FLC=0 */
 216
 217         /* The following should not be needed if SBLN = 1 */
 218
 219         0x7b, 0x16,             /* FAL=22 */
 220         0x7c, 0x35,             /* LAL=244 */
 221         0x7d, 0x20,             /* LAL=244, FAL=22 */
 222 };
 223
 224 static const unsigned char init_pal[] = {
 225         0x61, 0x1e,             /* FISE=0, PAL=1, SCBW=1, RTCE=1,
 226                                  * YGS=1, INPI=0, DOWN=0 */
 227         0x62, 0xc8,             /* DECTYP=1, BSTA=72 */
 228         0x63, 0xcb,             /* FSC0 */
 229         0x64, 0x8a,             /* FSC1 */
 230         0x65, 0x09,             /* FSC2 */
 231         0x66, 0x2a,             /* FSC3 */
 232 };
 233
 234 static const unsigned char init_ntsc[] = {
 235         0x61, 0x1d,             /* FISE=1, PAL=0, SCBW=1, RTCE=1,
 236                                  * YGS=1, INPI=0, DOWN=0 */
 237         0x62, 0xe6,             /* DECTYP=1, BSTA=102 */
 238         0x63, 0x1f,             /* FSC0 */
 239         0x64, 0x7c,             /* FSC1 */
 240         0x65, 0xf0,             /* FSC2 */
 241         0x66, 0x21,             /* FSC3 */
 242 };
 243
 244 static int
 245 saa7185_command (struct i2c_client *client,
 246                  unsigned int       cmd,
 247                  void              *arg)
 248 {
 249         struct saa7185 *encoder = i2c_get_clientdata(client);
 250
 251         switch (cmd) {
 252
 253         case 0:
 254                 saa7185_write_block(client, init_common,
 255                                     sizeof(init_common));
 256                 switch (encoder->norm) {
 257
 258                 case VIDEO_MODE_NTSC:
 259                         saa7185_write_block(client, init_ntsc,
 260                                             sizeof(init_ntsc));
 261                         break;
 262
 263                 case VIDEO_MODE_PAL:
 264                         saa7185_write_block(client, init_pal,
 265                                             sizeof(init_pal));
 266                         break;
 267                 }
 268
 269                 break;
 270
 271         case ENCODER_GET_CAPABILITIES:
 272         {
 273                 struct video_encoder_capability *cap = arg;
 274
 275                 cap->flags =
 276                     VIDEO_ENCODER_PAL | VIDEO_ENCODER_NTSC |
 277                     VIDEO_ENCODER_SECAM | VIDEO_ENCODER_CCIR;
 278                 cap->inputs = 1;
 279                 cap->outputs = 1;
 280         }
 281                 break;
 282
 283         case ENCODER_SET_NORM:
 284         {
 285                 int *iarg = arg;
 286
 287                 //saa7185_write_block(client, init_common, sizeof(init_common));
 288
 289                 switch (*iarg) {
 290
 291                 case VIDEO_MODE_NTSC:
 292                         saa7185_write_block(client, init_ntsc,
 293                                             sizeof(init_ntsc));
 294                         break;
 295
 296                 case VIDEO_MODE_PAL:
 297                         saa7185_write_block(client, init_pal,
 298                                             sizeof(init_pal));
 299                         break;
 300
 301                 case VIDEO_MODE_SECAM:
 302                 default:
 303                         return -EINVAL;
 304
 305                 }
 306                 encoder->norm = *iarg;
 307         }
 308                 break;
 309
 310         case ENCODER_SET_INPUT:
 311         {
 312                 int *iarg = arg;
 313
 314                 /* RJ: *iarg = 0: input is from SA7111
 315                  *iarg = 1: input is from ZR36060 */
 316
 317                 switch (*iarg) {
 318
 319                 case 0:
 320                         /* Switch RTCE to 1 */
 321                         saa7185_write(client, 0x61,
 322                                       (encoder->reg[0x61] & 0xf7) | 0x08);
 323                         saa7185_write(client, 0x6e, 0x01);
 324                         break;
 325
 326                 case 1:
 327                         /* Switch RTCE to 0 */
 328                         saa7185_write(client, 0x61,
 329                                       (encoder->reg[0x61] & 0xf7) | 0x00);
 330                         /* SW: a slight sync problem... */
 331                         saa7185_write(client, 0x6e, 0x00);
 332                         break;
 333
 334                 default:
 335                         return -EINVAL;
 336
 337                 }
 338         }
 339                 break;
 340
 341         case ENCODER_SET_OUTPUT:
 342         {
 343                 int *iarg = arg;
 344
 345                 /* not much choice of outputs */
 346                 if (*iarg != 0) {
 347                         return -EINVAL;
 348                 }
 349         }
 350                 break;
 351
 352         case ENCODER_ENABLE_OUTPUT:
 353         {
 354                 int *iarg = arg;
 355
 356                 encoder->enable = !!*iarg;
 357                 saa7185_write(client, 0x61,
 358                               (encoder->reg[0x61] & 0xbf) |
 359                               (encoder->enable ? 0x00 : 0x40));
 360         }
 361                 break;
 362
 363         default:
 364                 return -EINVAL;
 365         }
 366
 367         return 0;
 368 }
 369
 370 /* ----------------------------------------------------------------------- */
 371
 372 /*
 373  * Generic i2c probe
 374  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
 375  */
 376 static unsigned short normal_i2c[] = { I2C_SAA7185 >> 1, I2C_CLIENT_END };
 377
 378 static unsigned short ignore = I2C_CLIENT_END;
 379
 380 static struct i2c_client_address_data addr_data = {
 381         .normal_i2c             = normal_i2c,
 382         .probe                  = &ignore,
 383         .ignore                 = &ignore,
 384 };
 385
 386 static struct i2c_driver i2c_driver_saa7185;
 387
 388 static int
 389 saa7185_detect_client (struct i2c_adapter *adapter,
 390                        int                 address,
 391                        int                 kind)
 392 {
 393         int i;
 394         struct i2c_client *client;
 395         struct saa7185 *encoder;
 396
 397         dprintk(1,
 398                 KERN_INFO
 399                 "saa7185.c: detecting saa7185 client on address 0x%x\n",
 400                 address << 1);
 401
 402         /* Check if the adapter supports the needed features */
 403         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 404                 return 0;
 405
 406         client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
 407         if (client == 0)
 408                 return -ENOMEM;
 409         client->addr = address;
 410         client->adapter = adapter;
 411         client->driver = &i2c_driver_saa7185;
 412         strlcpy(I2C_NAME(client), "saa7185", sizeof(I2C_NAME(client)));
 413
 414         encoder = kzalloc(sizeof(struct saa7185), GFP_KERNEL);
 415         if (encoder == NULL) {
 416                 kfree(client);
 417                 return -ENOMEM;
 418         }
 419         encoder->norm = VIDEO_MODE_NTSC;
 420         encoder->enable = 1;
 421         i2c_set_clientdata(client, encoder);
 422
 423         i = i2c_attach_client(client);
 424         if (i) {
 425                 kfree(client);
 426                 kfree(encoder);
 427                 return i;
 428         }
 429
 430         i = saa7185_write_block(client, init_common, sizeof(init_common));
 431         if (i >= 0) {
 432                 i = saa7185_write_block(client, init_ntsc,
 433                                         sizeof(init_ntsc));
 434         }
 435         if (i < 0) {
 436                 dprintk(1, KERN_ERR "%s_attach: init error %d\n",
 437                         I2C_NAME(client), i);
 438         } else {
 439                 dprintk(1,
 440                         KERN_INFO
 441                         "%s_attach: chip version %d at address 0x%x\n",
 442                         I2C_NAME(client), saa7185_read(client) >> 5,
 443                         client->addr << 1);
 444         }
 445
 446         return 0;
 447 }
 448
 449 static int
 450 saa7185_attach_adapter (struct i2c_adapter *adapter)
 451 {
 452         dprintk(1,
 453                 KERN_INFO
 454                 "saa7185.c: starting probe for adapter %s (0x%x)\n",
 455                 I2C_NAME(adapter), adapter->id);
 456         return i2c_probe(adapter, &addr_data, &saa7185_detect_client);
 457 }
 458
 459 static int
 460 saa7185_detach_client (struct i2c_client *client)
 461 {
 462         struct saa7185 *encoder = i2c_get_clientdata(client);
 463         int err;
 464
 465         err = i2c_detach_client(client);
 466         if (err) {
 467                 return err;
 468         }
 469
 470         saa7185_write(client, 0x61, (encoder->reg[0x61]) | 0x40);       /* SW: output off is active */
 471         //saa7185_write(client, 0x3a, (encoder->reg[0x3a]) | 0x80); /* SW: color bar */
 472
 473         kfree(encoder);
 474         kfree(client);
 475
 476         return 0;
 477 }
 478
 479 /* ----------------------------------------------------------------------- */
 480
 481 static struct i2c_driver i2c_driver_saa7185 = {
 482         .driver = {
 483                 .name = "saa7185",      /* name */
 484         },
 485
 486         .id = I2C_DRIVERID_SAA7185B,
 487
 488         .attach_adapter = saa7185_attach_adapter,
 489         .detach_client = saa7185_detach_client,
 490         .command = saa7185_command,
 491 };
 492
 493 static int __init
 494 saa7185_init (void)
 495 {
 496         return i2c_add_driver(&i2c_driver_saa7185);
 497 }
 498
 499 static void __exit
 500 saa7185_exit (void)
 501 {
 502         i2c_del_driver(&i2c_driver_saa7185);
 503 }
 504
 505 module_init(saa7185_init);
 506 module_exit(saa7185_exit);