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 <asm/segment.h>
  43 #include <linux/types.h>
  44
  45 #include <linux/videodev.h>
  46 #include <asm/uaccess.h>
  47
  48 MODULE_DESCRIPTION("Philips SAA7185 video encoder driver");
  49 MODULE_AUTHOR("Dave Perks");
  50 MODULE_LICENSE("GPL");
  51
  52 #include <linux/i2c.h>
  53 #include <linux/i2c-dev.h>
  54
  55 #define I2C_NAME(s) (s)->name
  56
  57 #include <linux/video_encoder.h>
  58
  59 static int debug = 0;
  60 module_param(debug, int, 0);
  61 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  62
  63 #define dprintk(num, format, args...) \
  64         do { \
  65                 if (debug >= num) \
  66                         printk(format, ##args); \
  67         } while (0)
  68
  69 /* ----------------------------------------------------------------------- */
  70
  71 struct saa7185 {
  72         unsigned char reg[128];
  73
  74         int norm;
  75         int enable;
  76         int bright;
  77         int contrast;
  78         int hue;
  79         int sat;
  80 };
  81
  82 #define   I2C_SAA7185        0x88
  83
  84 /* ----------------------------------------------------------------------- */
  85
  86 static inline int
  87 saa7185_read (struct i2c_client *client)
  88 {
  89         return i2c_smbus_read_byte(client);
  90 }
  91
  92 static int
  93 saa7185_write (struct i2c_client *client,
  94                u8                 reg,
  95                u8                 value)
  96 {
  97         struct saa7185 *encoder = i2c_get_clientdata(client);
  98
  99         dprintk(1, KERN_DEBUG "SAA7185: %02x set to %02x\n", reg, value);
 100         encoder->reg[reg] = value;
 101         return i2c_smbus_write_byte_data(client, reg, value);
 102 }
 103
 104 static int
 105 saa7185_write_block (struct i2c_client *client,
 106                      const u8          *data,
 107                      unsigned int       len)
 108 {
 109         int ret = -1;
 110         u8 reg;
 111
 112         /* the adv7175 has an autoincrement function, use it if
 113          * the adapter understands raw I2C */
 114         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 115                 /* do raw I2C, not smbus compatible */
 116                 struct saa7185 *encoder = i2c_get_clientdata(client);
 117                 struct i2c_msg msg;
 118                 u8 block_data[32];
 119
 120                 msg.addr = client->addr;
 121                 msg.flags = 0;
 122                 while (len >= 2) {
 123                         msg.buf = (char *) block_data;
 124                         msg.len = 0;
 125                         block_data[msg.len++] = reg = data[0];
 126                         do {
 127                                 block_data[msg.len++] =
 128                                     encoder->reg[reg++] = data[1];
 129                                 len -= 2;
 130                                 data += 2;
 131                         } while (len >= 2 && data[0] == reg &&
 132                                  msg.len < 32);
 133                         if ((ret = i2c_transfer(client->adapter,
 134                                                 &msg, 1)) < 0)
 135                                 break;
 136                 }
 137         } else {
 138                 /* do some slow I2C emulation kind of thing */
 139                 while (len >= 2) {
 140                         reg = *data++;
 141                         if ((ret = saa7185_write(client, reg,
 142                                                  *data++)) < 0)
 143                                 break;
 144                         len -= 2;
 145                 }
 146         }
 147
 148         return ret;
 149 }
 150
 151 /* ----------------------------------------------------------------------- */
 152
 153 static const unsigned char init_common[] = {
 154         0x3a, 0x0f,             /* CBENB=0, V656=0, VY2C=1,
 155                                  * YUV2C=1, MY2C=1, MUV2C=1 */
 156
 157         0x42, 0x6b,             /* OVLY0=107 */
 158         0x43, 0x00,             /* OVLU0=0     white */
 159         0x44, 0x00,             /* OVLV0=0   */
 160         0x45, 0x22,             /* OVLY1=34  */
 161         0x46, 0xac,             /* OVLU1=172   yellow */
 162         0x47, 0x0e,             /* OVLV1=14  */
 163         0x48, 0x03,             /* OVLY2=3   */
 164         0x49, 0x1d,             /* OVLU2=29    cyan */
 165         0x4a, 0xac,             /* OVLV2=172 */
 166         0x4b, 0xf0,             /* OVLY3=240 */
 167         0x4c, 0xc8,             /* OVLU3=200   green */
 168         0x4d, 0xb9,             /* OVLV3=185 */
 169         0x4e, 0xd4,             /* OVLY4=212 */
 170         0x4f, 0x38,             /* OVLU4=56    magenta */
 171         0x50, 0x47,             /* OVLV4=71  */
 172         0x51, 0xc1,             /* OVLY5=193 */
 173         0x52, 0xe3,             /* OVLU5=227   red */
 174         0x53, 0x54,             /* OVLV5=84  */
 175         0x54, 0xa3,             /* OVLY6=163 */
 176         0x55, 0x54,             /* OVLU6=84    blue */
 177         0x56, 0xf2,             /* OVLV6=242 */
 178         0x57, 0x90,             /* OVLY7=144 */
 179         0x58, 0x00,             /* OVLU7=0     black */
 180         0x59, 0x00,             /* OVLV7=0   */
 181
 182         0x5a, 0x00,             /* CHPS=0    */
 183         0x5b, 0x76,             /* GAINU=118 */
 184         0x5c, 0xa5,             /* GAINV=165 */
 185         0x5d, 0x3c,             /* BLCKL=60  */
 186         0x5e, 0x3a,             /* BLNNL=58  */
 187         0x5f, 0x3a,             /* CCRS=0, BLNVB=58 */
 188         0x60, 0x00,             /* NULL      */
 189
 190         /* 0x61 - 0x66 set according to norm */
 191
 192         0x67, 0x00,             /* 0 : caption 1st byte odd  field */
 193         0x68, 0x00,             /* 0 : caption 2nd byte odd  field */
 194         0x69, 0x00,             /* 0 : caption 1st byte even field */
 195         0x6a, 0x00,             /* 0 : caption 2nd byte even field */
 196
 197         0x6b, 0x91,             /* MODIN=2, PCREF=0, SCCLN=17 */
 198         0x6c, 0x20,             /* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0,
 199                                  * CBLF=0, ORCV2=0, PRCV2=0 */
 200         0x6d, 0x00,             /* SRCM1=0, CCEN=0 */
 201
 202         0x6e, 0x0e,             /* HTRIG=0x005, approx. centered, at
 203                                  * least for PAL */
 204         0x6f, 0x00,             /* HTRIG upper bits */
 205         0x70, 0x20,             /* PHRES=0, SBLN=1, VTRIG=0 */
 206
 207         /* The following should not be needed */
 208
 209         0x71, 0x15,             /* BMRQ=0x115 */
 210         0x72, 0x90,             /* EMRQ=0x690 */
 211         0x73, 0x61,             /* EMRQ=0x690, BMRQ=0x115 */
 212         0x74, 0x00,             /* NULL       */
 213         0x75, 0x00,             /* NULL       */
 214         0x76, 0x00,             /* NULL       */
 215         0x77, 0x15,             /* BRCV=0x115 */
 216         0x78, 0x90,             /* ERCV=0x690 */
 217         0x79, 0x61,             /* ERCV=0x690, BRCV=0x115 */
 218
 219         /* Field length controls */
 220
 221         0x7a, 0x70,             /* FLC=0 */
 222
 223         /* The following should not be needed if SBLN = 1 */
 224
 225         0x7b, 0x16,             /* FAL=22 */
 226         0x7c, 0x35,             /* LAL=244 */
 227         0x7d, 0x20,             /* LAL=244, FAL=22 */
 228 };
 229
 230 static const unsigned char init_pal[] = {
 231         0x61, 0x1e,             /* FISE=0, PAL=1, SCBW=1, RTCE=1,
 232                                  * YGS=1, INPI=0, DOWN=0 */
 233         0x62, 0xc8,             /* DECTYP=1, BSTA=72 */
 234         0x63, 0xcb,             /* FSC0 */
 235         0x64, 0x8a,             /* FSC1 */
 236         0x65, 0x09,             /* FSC2 */
 237         0x66, 0x2a,             /* FSC3 */
 238 };
 239
 240 static const unsigned char init_ntsc[] = {
 241         0x61, 0x1d,             /* FISE=1, PAL=0, SCBW=1, RTCE=1,
 242                                  * YGS=1, INPI=0, DOWN=0 */
 243         0x62, 0xe6,             /* DECTYP=1, BSTA=102 */
 244         0x63, 0x1f,             /* FSC0 */
 245         0x64, 0x7c,             /* FSC1 */
 246         0x65, 0xf0,             /* FSC2 */
 247         0x66, 0x21,             /* FSC3 */
 248 };
 249
 250 static int
 251 saa7185_command (struct i2c_client *client,
 252                  unsigned int       cmd,
 253                  void              *arg)
 254 {
 255         struct saa7185 *encoder = i2c_get_clientdata(client);
 256
 257         switch (cmd) {
 258
 259         case 0:
 260                 saa7185_write_block(client, init_common,
 261                                     sizeof(init_common));
 262                 switch (encoder->norm) {
 263
 264                 case VIDEO_MODE_NTSC:
 265                         saa7185_write_block(client, init_ntsc,
 266                                             sizeof(init_ntsc));
 267                         break;
 268
 269                 case VIDEO_MODE_PAL:
 270                         saa7185_write_block(client, init_pal,
 271                                             sizeof(init_pal));
 272                         break;
 273                 }
 274
 275                 break;
 276
 277         case ENCODER_GET_CAPABILITIES:
 278         {
 279                 struct video_encoder_capability *cap = arg;
 280
 281                 cap->flags =
 282                     VIDEO_ENCODER_PAL | VIDEO_ENCODER_NTSC |
 283                     VIDEO_ENCODER_SECAM | VIDEO_ENCODER_CCIR;
 284                 cap->inputs = 1;
 285                 cap->outputs = 1;
 286         }
 287                 break;
 288
 289         case ENCODER_SET_NORM:
 290         {
 291                 int *iarg = arg;
 292
 293                 //saa7185_write_block(client, init_common, sizeof(init_common));
 294
 295                 switch (*iarg) {
 296
 297                 case VIDEO_MODE_NTSC:
 298                         saa7185_write_block(client, init_ntsc,
 299                                             sizeof(init_ntsc));
 300                         break;
 301
 302                 case VIDEO_MODE_PAL:
 303                         saa7185_write_block(client, init_pal,
 304                                             sizeof(init_pal));
 305                         break;
 306
 307                 case VIDEO_MODE_SECAM:
 308                 default:
 309                         return -EINVAL;
 310
 311                 }
 312                 encoder->norm = *iarg;
 313         }
 314                 break;
 315
 316         case ENCODER_SET_INPUT:
 317         {
 318                 int *iarg = arg;
 319
 320                 /* RJ: *iarg = 0: input is from SA7111
 321                  *iarg = 1: input is from ZR36060 */
 322
 323                 switch (*iarg) {
 324
 325                 case 0:
 326                         /* Switch RTCE to 1 */
 327                         saa7185_write(client, 0x61,
 328                                       (encoder->reg[0x61] & 0xf7) | 0x08);
 329                         saa7185_write(client, 0x6e, 0x01);
 330                         break;
 331
 332                 case 1:
 333                         /* Switch RTCE to 0 */
 334                         saa7185_write(client, 0x61,
 335                                       (encoder->reg[0x61] & 0xf7) | 0x00);
 336                         /* SW: a slight sync problem... */
 337                         saa7185_write(client, 0x6e, 0x00);
 338                         break;
 339
 340                 default:
 341                         return -EINVAL;
 342
 343                 }
 344         }
 345                 break;
 346
 347         case ENCODER_SET_OUTPUT:
 348         {
 349                 int *iarg = arg;
 350
 351                 /* not much choice of outputs */
 352                 if (*iarg != 0) {
 353                         return -EINVAL;
 354                 }
 355         }
 356                 break;
 357
 358         case ENCODER_ENABLE_OUTPUT:
 359         {
 360                 int *iarg = arg;
 361
 362                 encoder->enable = !!*iarg;
 363                 saa7185_write(client, 0x61,
 364                               (encoder->reg[0x61] & 0xbf) |
 365                               (encoder->enable ? 0x00 : 0x40));
 366         }
 367                 break;
 368
 369         default:
 370                 return -EINVAL;
 371         }
 372
 373         return 0;
 374 }
 375
 376 /* ----------------------------------------------------------------------- */
 377
 378 /*
 379  * Generic i2c probe
 380  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
 381  */
 382 static unsigned short normal_i2c[] = { I2C_SAA7185 >> 1, I2C_CLIENT_END };
 383 static unsigned short normal_i2c_range[] = { I2C_CLIENT_END };
 384
 385 static unsigned short probe[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
 386 static unsigned short probe_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
 387 static unsigned short ignore[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
 388 static unsigned short ignore_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
 389 static unsigned short force[2] = { I2C_CLIENT_END , I2C_CLIENT_END };
 390
 391 static struct i2c_client_address_data addr_data = {
 392         .normal_i2c             = normal_i2c,
 393         .normal_i2c_range       = normal_i2c_range,
 394         .probe                  = probe,
 395         .probe_range            = probe_range,
 396         .ignore                 = ignore,
 397         .ignore_range           = ignore_range,
 398         .force                  = force
 399 };
 400
 401 static struct i2c_driver i2c_driver_saa7185;
 402
 403 static int
 404 saa7185_detect_client (struct i2c_adapter *adapter,
 405                        int                 address,
 406                        int                 kind)
 407 {
 408         int i;
 409         struct i2c_client *client;
 410         struct saa7185 *encoder;
 411
 412         dprintk(1,
 413                 KERN_INFO
 414                 "saa7185.c: detecting saa7185 client on address 0x%x\n",
 415                 address << 1);
 416
 417         /* Check if the adapter supports the needed features */
 418         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 419                 return 0;
 420
 421         client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
 422         if (client == 0)
 423                 return -ENOMEM;
 424         memset(client, 0, sizeof(struct i2c_client));
 425         client->addr = address;
 426         client->adapter = adapter;
 427         client->driver = &i2c_driver_saa7185;
 428         client->flags = I2C_CLIENT_ALLOW_USE;
 429         strlcpy(I2C_NAME(client), "saa7185", sizeof(I2C_NAME(client)));
 430
 431         encoder = kmalloc(sizeof(struct saa7185), GFP_KERNEL);
 432         if (encoder == NULL) {
 433                 kfree(client);
 434                 return -ENOMEM;
 435         }
 436         memset(encoder, 0, sizeof(struct saa7185));
 437         encoder->norm = VIDEO_MODE_NTSC;
 438         encoder->enable = 1;
 439         i2c_set_clientdata(client, encoder);
 440
 441         i = i2c_attach_client(client);
 442         if (i) {
 443                 kfree(client);
 444                 kfree(encoder);
 445                 return i;
 446         }
 447
 448         i = saa7185_write_block(client, init_common, sizeof(init_common));
 449         if (i >= 0) {
 450                 i = saa7185_write_block(client, init_ntsc,
 451                                         sizeof(init_ntsc));
 452         }
 453         if (i < 0) {
 454                 dprintk(1, KERN_ERR "%s_attach: init error %d\n",
 455                         I2C_NAME(client), i);
 456         } else {
 457                 dprintk(1,
 458                         KERN_INFO
 459                         "%s_attach: chip version %d at address 0x%x\n",
 460                         I2C_NAME(client), saa7185_read(client) >> 5,
 461                         client->addr << 1);
 462         }
 463
 464         return 0;
 465 }
 466
 467 static int
 468 saa7185_attach_adapter (struct i2c_adapter *adapter)
 469 {
 470         dprintk(1,
 471                 KERN_INFO
 472                 "saa7185.c: starting probe for adapter %s (0x%x)\n",
 473                 I2C_NAME(adapter), adapter->id);
 474         return i2c_probe(adapter, &addr_data, &saa7185_detect_client);
 475 }
 476
 477 static int
 478 saa7185_detach_client (struct i2c_client *client)
 479 {
 480         struct saa7185 *encoder = i2c_get_clientdata(client);
 481         int err;
 482
 483         err = i2c_detach_client(client);
 484         if (err) {
 485                 return err;
 486         }
 487
 488         saa7185_write(client, 0x61, (encoder->reg[0x61]) | 0x40);       /* SW: output off is active */
 489         //saa7185_write(client, 0x3a, (encoder->reg[0x3a]) | 0x80); /* SW: color bar */
 490
 491         kfree(encoder);
 492         kfree(client);
 493
 494         return 0;
 495 }
 496
 497 /* ----------------------------------------------------------------------- */
 498
 499 static struct i2c_driver i2c_driver_saa7185 = {
 500         .owner = THIS_MODULE,
 501         .name = "saa7185",      /* name */
 502
 503         .id = I2C_DRIVERID_SAA7185B,
 504         .flags = I2C_DF_NOTIFY,
 505
 506         .attach_adapter = saa7185_attach_adapter,
 507         .detach_client = saa7185_detach_client,
 508         .command = saa7185_command,
 509 };
 510
 511 static int __init
 512 saa7185_init (void)
 513 {
 514         return i2c_add_driver(&i2c_driver_saa7185);
 515 }
 516
 517 static void __exit
 518 saa7185_exit (void)
 519 {
 520         i2c_del_driver(&i2c_driver_saa7185);
 521 }
 522
 523 module_init(saa7185_init);
 524 module_exit(saa7185_exit);