drivers/media/video/saa7111.c

   1 /*
   2  * saa7111 - Philips SAA7111A video decoder 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  * Changes by Michael Hunold <michael@mihu.de>
  13  *    - implemented DECODER_SET_GPIO, DECODER_INIT, DECODER_SET_VBI_BYPASS
  14  *
  15  * This program is free software; you can redistribute it and/or modify
  16  * it under the terms of the GNU General Public License as published by
  17  * the Free Software Foundation; either version 2 of the License, or
  18  * (at your option) any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  * GNU General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License
  26  * along with this program; if not, write to the Free Software
  27  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  28  */
  29
  30 #include <linux/module.h>
  31 #include <linux/types.h>
  32 #include <linux/ioctl.h>
  33 #include <asm/uaccess.h>
  34 #include <linux/i2c.h>
  35 #include <linux/i2c-id.h>
  36 #include <linux/videodev.h>
  37 #include <linux/video_decoder.h>
  38 #include <media/v4l2-common.h>
  39 #include <media/v4l2-i2c-drv-legacy.h>
  40
  41 MODULE_DESCRIPTION("Philips SAA7111 video decoder driver");
  42 MODULE_AUTHOR("Dave Perks");
  43 MODULE_LICENSE("GPL");
  44
  45 static int debug;
  46 module_param(debug, int, 0644);
  47 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  48
  49 /* ----------------------------------------------------------------------- */
  50
  51 #define SAA7111_NR_REG          0x18
  52
  53 struct saa7111 {
  54         unsigned char reg[SAA7111_NR_REG];
  55
  56         int norm;
  57         int input;
  58         int enable;
  59 };
  60
  61 /* ----------------------------------------------------------------------- */
  62
  63 static inline int saa7111_write(struct i2c_client *client, u8 reg, u8 value)
  64 {
  65         struct saa7111 *decoder = i2c_get_clientdata(client);
  66
  67         decoder->reg[reg] = value;
  68         return i2c_smbus_write_byte_data(client, reg, value);
  69 }
  70
  71 static inline void saa7111_write_if_changed(struct i2c_client *client, u8 reg, u8 value)
  72 {
  73         struct saa7111 *decoder = i2c_get_clientdata(client);
  74
  75         if (decoder->reg[reg] != value) {
  76                 decoder->reg[reg] = value;
  77                 i2c_smbus_write_byte_data(client, reg, value);
  78         }
  79 }
  80
  81 static int saa7111_write_block(struct i2c_client *client, const u8 *data, unsigned int len)
  82 {
  83         int ret = -1;
  84         u8 reg;
  85
  86         /* the saa7111 has an autoincrement function, use it if
  87          * the adapter understands raw I2C */
  88         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
  89                 /* do raw I2C, not smbus compatible */
  90                 struct saa7111 *decoder = i2c_get_clientdata(client);
  91                 u8 block_data[32];
  92                 int block_len;
  93
  94                 while (len >= 2) {
  95                         block_len = 0;
  96                         block_data[block_len++] = reg = data[0];
  97                         do {
  98                                 block_data[block_len++] =
  99                                     decoder->reg[reg++] = data[1];
 100                                 len -= 2;
 101                                 data += 2;
 102                         } while (len >= 2 && data[0] == reg && block_len < 32);
 103                         ret = i2c_master_send(client, block_data, block_len);
 104                         if (ret < 0)
 105                                 break;
 106                 }
 107         } else {
 108                 /* do some slow I2C emulation kind of thing */
 109                 while (len >= 2) {
 110                         reg = *data++;
 111                         ret = saa7111_write(client, reg, *data++);
 112                         if (ret < 0)
 113                                 break;
 114                         len -= 2;
 115                 }
 116         }
 117
 118         return ret;
 119 }
 120
 121 static int saa7111_init_decoder(struct i2c_client *client,
 122                 struct video_decoder_init *init)
 123 {
 124         return saa7111_write_block(client, init->data, init->len);
 125 }
 126
 127 static inline int saa7111_read(struct i2c_client *client, u8 reg)
 128 {
 129         return i2c_smbus_read_byte_data(client, reg);
 130 }
 131
 132 /* ----------------------------------------------------------------------- */
 133
 134 static const unsigned char saa7111_i2c_init[] = {
 135         0x00, 0x00,             /* 00 - ID byte */
 136         0x01, 0x00,             /* 01 - reserved */
 137
 138         /*front end */
 139         0x02, 0xd0,             /* 02 - FUSE=3, GUDL=2, MODE=0 */
 140         0x03, 0x23,             /* 03 - HLNRS=0, VBSL=1, WPOFF=0,
 141                                  * HOLDG=0, GAFIX=0, GAI1=256, GAI2=256 */
 142         0x04, 0x00,             /* 04 - GAI1=256 */
 143         0x05, 0x00,             /* 05 - GAI2=256 */
 144
 145         /* decoder */
 146         0x06, 0xf3,             /* 06 - HSB at  13(50Hz) /  17(60Hz)
 147                                  * pixels after end of last line */
 148         /*0x07, 0x13,     * 07 - HSS at 113(50Hz) / 117(60Hz) pixels
 149                                  * after end of last line */
 150         0x07, 0xe8,             /* 07 - HSS seems to be needed to
 151                                  * work with NTSC, too */
 152         0x08, 0xc8,             /* 08 - AUFD=1, FSEL=1, EXFIL=0,
 153                                  * VTRC=1, HPLL=0, VNOI=0 */
 154         0x09, 0x01,             /* 09 - BYPS=0, PREF=0, BPSS=0,
 155                                  * VBLB=0, UPTCV=0, APER=1 */
 156         0x0a, 0x80,             /* 0a - BRIG=128 */
 157         0x0b, 0x47,             /* 0b - CONT=1.109 */
 158         0x0c, 0x40,             /* 0c - SATN=1.0 */
 159         0x0d, 0x00,             /* 0d - HUE=0 */
 160         0x0e, 0x01,             /* 0e - CDTO=0, CSTD=0, DCCF=0,
 161                                  * FCTC=0, CHBW=1 */
 162         0x0f, 0x00,             /* 0f - reserved */
 163         0x10, 0x48,             /* 10 - OFTS=1, HDEL=0, VRLN=1, YDEL=0 */
 164         0x11, 0x1c,             /* 11 - GPSW=0, CM99=0, FECO=0, COMPO=1,
 165                                  * OEYC=1, OEHV=1, VIPB=0, COLO=0 */
 166         0x12, 0x00,             /* 12 - output control 2 */
 167         0x13, 0x00,             /* 13 - output control 3 */
 168         0x14, 0x00,             /* 14 - reserved */
 169         0x15, 0x00,             /* 15 - VBI */
 170         0x16, 0x00,             /* 16 - VBI */
 171         0x17, 0x00,             /* 17 - VBI */
 172 };
 173
 174 static int saa7111_command(struct i2c_client *client, unsigned cmd, void *arg)
 175 {
 176         struct saa7111 *decoder = i2c_get_clientdata(client);
 177
 178         switch (cmd) {
 179         case 0:
 180                 break;
 181         case DECODER_INIT:
 182         {
 183                 struct video_decoder_init *init = arg;
 184                 struct video_decoder_init vdi;
 185
 186                 if (NULL != init)
 187                         return saa7111_init_decoder(client, init);
 188                 vdi.data = saa7111_i2c_init;
 189                 vdi.len = sizeof(saa7111_i2c_init);
 190                 return saa7111_init_decoder(client, &vdi);
 191         }
 192
 193         case DECODER_DUMP:
 194         {
 195                 int i;
 196
 197                 for (i = 0; i < SAA7111_NR_REG; i += 16) {
 198                         int j;
 199
 200                         v4l_info(client, "%03x", i);
 201                         for (j = 0; j < 16 && i + j < SAA7111_NR_REG; ++j) {
 202                                 printk(KERN_CONT " %02x",
 203                                        saa7111_read(client, i + j));
 204                         }
 205                         printk(KERN_CONT "\n");
 206                 }
 207                 break;
 208         }
 209
 210         case DECODER_GET_CAPABILITIES:
 211         {
 212                 struct video_decoder_capability *cap = arg;
 213
 214                 cap->flags = VIDEO_DECODER_PAL |
 215                              VIDEO_DECODER_NTSC |
 216                              VIDEO_DECODER_SECAM |
 217                              VIDEO_DECODER_AUTO |
 218                              VIDEO_DECODER_CCIR;
 219                 cap->inputs = 8;
 220                 cap->outputs = 1;
 221                 break;
 222         }
 223
 224         case DECODER_GET_STATUS:
 225         {
 226                 int *iarg = arg;
 227                 int status;
 228                 int res;
 229
 230                 status = saa7111_read(client, 0x1f);
 231                 v4l_dbg(1, debug, client, "status: 0x%02x\n", status);
 232                 res = 0;
 233                 if ((status & (1 << 6)) == 0) {
 234                         res |= DECODER_STATUS_GOOD;
 235                 }
 236                 switch (decoder->norm) {
 237                 case VIDEO_MODE_NTSC:
 238                         res |= DECODER_STATUS_NTSC;
 239                         break;
 240                 case VIDEO_MODE_PAL:
 241                         res |= DECODER_STATUS_PAL;
 242                         break;
 243                 case VIDEO_MODE_SECAM:
 244                         res |= DECODER_STATUS_SECAM;
 245                         break;
 246                 default:
 247                 case VIDEO_MODE_AUTO:
 248                         if ((status & (1 << 5)) != 0) {
 249                                 res |= DECODER_STATUS_NTSC;
 250                         } else {
 251                                 res |= DECODER_STATUS_PAL;
 252                         }
 253                         break;
 254                 }
 255                 if ((status & (1 << 0)) != 0) {
 256                         res |= DECODER_STATUS_COLOR;
 257                 }
 258                 *iarg = res;
 259                 break;
 260         }
 261
 262         case DECODER_SET_GPIO:
 263         {
 264                 int *iarg = arg;
 265                 if (0 != *iarg) {
 266                         saa7111_write(client, 0x11,
 267                                 (decoder->reg[0x11] | 0x80));
 268                 } else {
 269                         saa7111_write(client, 0x11,
 270                                 (decoder->reg[0x11] & 0x7f));
 271                 }
 272                 break;
 273         }
 274
 275         case DECODER_SET_VBI_BYPASS:
 276         {
 277                 int *iarg = arg;
 278                 if (0 != *iarg) {
 279                         saa7111_write(client, 0x13,
 280                                 (decoder->reg[0x13] & 0xf0) | 0x0a);
 281                 } else {
 282                         saa7111_write(client, 0x13,
 283                                 (decoder->reg[0x13] & 0xf0));
 284                 }
 285                 break;
 286         }
 287
 288         case DECODER_SET_NORM:
 289         {
 290                 int *iarg = arg;
 291
 292                 switch (*iarg) {
 293
 294                 case VIDEO_MODE_NTSC:
 295                         saa7111_write(client, 0x08,
 296                                       (decoder->reg[0x08] & 0x3f) | 0x40);
 297                         saa7111_write(client, 0x0e,
 298                                       (decoder->reg[0x0e] & 0x8f));
 299                         break;
 300
 301                 case VIDEO_MODE_PAL:
 302                         saa7111_write(client, 0x08,
 303                                       (decoder->reg[0x08] & 0x3f) | 0x00);
 304                         saa7111_write(client, 0x0e,
 305                                       (decoder->reg[0x0e] & 0x8f));
 306                         break;
 307
 308                 case VIDEO_MODE_SECAM:
 309                         saa7111_write(client, 0x08,
 310                                       (decoder->reg[0x08] & 0x3f) | 0x00);
 311                         saa7111_write(client, 0x0e,
 312                                       (decoder->reg[0x0e] & 0x8f) | 0x50);
 313                         break;
 314
 315                 case VIDEO_MODE_AUTO:
 316                         saa7111_write(client, 0x08,
 317                                       (decoder->reg[0x08] & 0x3f) | 0x80);
 318                         saa7111_write(client, 0x0e,
 319                                       (decoder->reg[0x0e] & 0x8f));
 320                         break;
 321
 322                 default:
 323                         return -EINVAL;
 324
 325                 }
 326                 decoder->norm = *iarg;
 327                 break;
 328         }
 329
 330         case DECODER_SET_INPUT:
 331         {
 332                 int *iarg = arg;
 333
 334                 if (*iarg < 0 || *iarg > 7) {
 335                         return -EINVAL;
 336                 }
 337
 338                 if (decoder->input != *iarg) {
 339                         decoder->input = *iarg;
 340                         /* select mode */
 341                         saa7111_write(client, 0x02,
 342                                       (decoder->
 343                                        reg[0x02] & 0xf8) | decoder->input);
 344                         /* bypass chrominance trap for modes 4..7 */
 345                         saa7111_write(client, 0x09,
 346                                       (decoder->
 347                                        reg[0x09] & 0x7f) | ((decoder->
 348                                                              input >
 349                                                              3) ? 0x80 :
 350                                                             0));
 351                 }
 352                 break;
 353         }
 354
 355         case DECODER_SET_OUTPUT:
 356         {
 357                 int *iarg = arg;
 358
 359                 /* not much choice of outputs */
 360                 if (*iarg != 0) {
 361                         return -EINVAL;
 362                 }
 363                 break;
 364         }
 365
 366         case DECODER_ENABLE_OUTPUT:
 367         {
 368                 int *iarg = arg;
 369                 int enable = (*iarg != 0);
 370
 371                 if (decoder->enable != enable) {
 372                         decoder->enable = enable;
 373
 374                         /* RJ: If output should be disabled (for
 375                          * playing videos), we also need a open PLL.
 376                          * The input is set to 0 (where no input
 377                          * source is connected), although this
 378                          * is not necessary.
 379                          *
 380                          * If output should be enabled, we have to
 381                          * reverse the above.
 382                          */
 383
 384                         if (decoder->enable) {
 385                                 saa7111_write(client, 0x02,
 386                                               (decoder->
 387                                                reg[0x02] & 0xf8) |
 388                                               decoder->input);
 389                                 saa7111_write(client, 0x08,
 390                                               (decoder->reg[0x08] & 0xfb));
 391                                 saa7111_write(client, 0x11,
 392                                               (decoder->
 393                                                reg[0x11] & 0xf3) | 0x0c);
 394                         } else {
 395                                 saa7111_write(client, 0x02,
 396                                               (decoder->reg[0x02] & 0xf8));
 397                                 saa7111_write(client, 0x08,
 398                                               (decoder->
 399                                                reg[0x08] & 0xfb) | 0x04);
 400                                 saa7111_write(client, 0x11,
 401                                               (decoder->reg[0x11] & 0xf3));
 402                         }
 403                 }
 404                 break;
 405         }
 406
 407         case DECODER_SET_PICTURE:
 408         {
 409                 struct video_picture *pic = arg;
 410
 411                 /* We want 0 to 255 we get 0-65535 */
 412                 saa7111_write_if_changed(client, 0x0a, pic->brightness >> 8);
 413                 /* We want 0 to 127 we get 0-65535 */
 414                 saa7111_write(client, 0x0b, pic->contrast >> 9);
 415                 /* We want 0 to 127 we get 0-65535 */
 416                 saa7111_write(client, 0x0c, pic->colour >> 9);
 417                 /* We want -128 to 127 we get 0-65535 */
 418                 saa7111_write(client, 0x0d, (pic->hue - 32768) >> 8);
 419                 break;
 420         }
 421
 422         default:
 423                 return -EINVAL;
 424         }
 425
 426         return 0;
 427 }
 428
 429 /* ----------------------------------------------------------------------- */
 430
 431 static unsigned short normal_i2c[] = { 0x48 >> 1, I2C_CLIENT_END };
 432
 433 I2C_CLIENT_INSMOD;
 434
 435 static int saa7111_probe(struct i2c_client *client,
 436                         const struct i2c_device_id *id)
 437 {
 438         int i;
 439         struct saa7111 *decoder;
 440         struct video_decoder_init vdi;
 441
 442         /* Check if the adapter supports the needed features */
 443         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 444                 return -ENODEV;
 445
 446         v4l_info(client, "chip found @ 0x%x (%s)\n",
 447                         client->addr << 1, client->adapter->name);
 448
 449         decoder = kzalloc(sizeof(struct saa7111), GFP_KERNEL);
 450         if (decoder == NULL) {
 451                 kfree(client);
 452                 return -ENOMEM;
 453         }
 454         decoder->norm = VIDEO_MODE_NTSC;
 455         decoder->input = 0;
 456         decoder->enable = 1;
 457         i2c_set_clientdata(client, decoder);
 458
 459         vdi.data = saa7111_i2c_init;
 460         vdi.len = sizeof(saa7111_i2c_init);
 461         i = saa7111_init_decoder(client, &vdi);
 462         if (i < 0) {
 463                 v4l_dbg(1, debug, client, "init status %d\n", i);
 464         } else {
 465                 v4l_dbg(1, debug, client, "revision %x\n",
 466                         saa7111_read(client, 0x00) >> 4);
 467         }
 468         return 0;
 469 }
 470
 471 static int saa7111_remove(struct i2c_client *client)
 472 {
 473         kfree(i2c_get_clientdata(client));
 474         return 0;
 475 }
 476
 477 /* ----------------------------------------------------------------------- */
 478
 479 static const struct i2c_device_id saa7111_id[] = {
 480         { "saa7111_old", 0 },   /* "saa7111" maps to the saa7115 driver */
 481         { }
 482 };
 483 MODULE_DEVICE_TABLE(i2c, saa7111_id);
 484
 485 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
 486         .name = "saa7111",
 487         .driverid = I2C_DRIVERID_SAA7111A,
 488         .command = saa7111_command,
 489         .probe = saa7111_probe,
 490         .remove = saa7111_remove,
 491         .id_table = saa7111_id,
 492 };