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