drivers/media/video/saa7110.c

   1 /*
   2  * saa7110 - Philips SAA7110(A) video decoder driver
   3  *
   4  * Copyright (C) 1998 Pauline Middelink <middelin@polyware.nl>
   5  *
   6  * Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net>
   7  * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
   8  *    - some corrections for Pinnacle Systems Inc. DC10plus card.
   9  *
  10  * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
  11  *    - moved over to linux>=2.4.x i2c protocol (1/1/2003)
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  26  */
  27
  28 #include <linux/module.h>
  29 #include <linux/init.h>
  30 #include <linux/types.h>
  31 #include <linux/delay.h>
  32 #include <linux/slab.h>
  33 #include <linux/wait.h>
  34 #include <asm/io.h>
  35 #include <asm/uaccess.h>
  36
  37 MODULE_DESCRIPTION("Philips SAA7110 video decoder driver");
  38 MODULE_AUTHOR("Pauline Middelink");
  39 MODULE_LICENSE("GPL");
  40
  41 #include <linux/i2c.h>
  42
  43 #define I2C_NAME(s) (s)->name
  44
  45 #include <linux/videodev.h>
  46 #include <media/v4l2-common.h>
  47 #include <linux/video_decoder.h>
  48
  49 static int debug;
  50 module_param(debug, int, 0);
  51 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  52
  53 #define dprintk(num, format, args...) \
  54         do { \
  55                 if (debug >= num) \
  56                         printk(format, ##args); \
  57         } while (0)
  58
  59 #define SAA7110_MAX_INPUT       9       /* 6 CVBS, 3 SVHS */
  60 #define SAA7110_MAX_OUTPUT      0       /* its a decoder only */
  61
  62 #define I2C_SAA7110             0x9C    /* or 0x9E */
  63
  64 #define SAA7110_NR_REG          0x35
  65
  66 struct saa7110 {
  67         u8 reg[SAA7110_NR_REG];
  68
  69         int norm;
  70         int input;
  71         int enable;
  72         int bright;
  73         int contrast;
  74         int hue;
  75         int sat;
  76
  77         wait_queue_head_t wq;
  78 };
  79
  80 /* ----------------------------------------------------------------------- */
  81 /* I2C support functions                                                   */
  82 /* ----------------------------------------------------------------------- */
  83
  84 static int
  85 saa7110_write (struct i2c_client *client,
  86                u8                 reg,
  87                u8                 value)
  88 {
  89         struct saa7110 *decoder = i2c_get_clientdata(client);
  90
  91         decoder->reg[reg] = value;
  92         return i2c_smbus_write_byte_data(client, reg, value);
  93 }
  94
  95 static int
  96 saa7110_write_block (struct i2c_client *client,
  97                      const u8          *data,
  98                      unsigned int       len)
  99 {
 100         int ret = -1;
 101         u8 reg = *data;         /* first register to write to */
 102
 103         /* Sanity check */
 104         if (reg + (len - 1) > SAA7110_NR_REG)
 105                 return ret;
 106
 107         /* the saa7110 has an autoincrement function, use it if
 108          * the adapter understands raw I2C */
 109         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 110                 struct saa7110 *decoder = i2c_get_clientdata(client);
 111
 112                 ret = i2c_master_send(client, data, len);
 113
 114                 /* Cache the written data */
 115                 memcpy(decoder->reg + reg, data + 1, len - 1);
 116         } else {
 117                 for (++data, --len; len; len--) {
 118                         if ((ret = saa7110_write(client, reg++,
 119                                                  *data++)) < 0)
 120                                 break;
 121                 }
 122         }
 123
 124         return ret;
 125 }
 126
 127 static inline int
 128 saa7110_read (struct i2c_client *client)
 129 {
 130         return i2c_smbus_read_byte(client);
 131 }
 132
 133 /* ----------------------------------------------------------------------- */
 134 /* SAA7110 functions                                                       */
 135 /* ----------------------------------------------------------------------- */
 136
 137 #define FRESP_06H_COMPST 0x03   //0x13
 138 #define FRESP_06H_SVIDEO 0x83   //0xC0
 139
 140
 141 static int
 142 saa7110_selmux (struct i2c_client *client,
 143                 int                chan)
 144 {
 145         static const unsigned char modes[9][8] = {
 146                 /* mode 0 */
 147                 {FRESP_06H_COMPST, 0xD9, 0x17, 0x40, 0x03,
 148                               0x44, 0x75, 0x16},
 149                 /* mode 1 */
 150                 {FRESP_06H_COMPST, 0xD8, 0x17, 0x40, 0x03,
 151                               0x44, 0x75, 0x16},
 152                 /* mode 2 */
 153                 {FRESP_06H_COMPST, 0xBA, 0x07, 0x91, 0x03,
 154                               0x60, 0xB5, 0x05},
 155                 /* mode 3 */
 156                 {FRESP_06H_COMPST, 0xB8, 0x07, 0x91, 0x03,
 157                               0x60, 0xB5, 0x05},
 158                 /* mode 4 */
 159                 {FRESP_06H_COMPST, 0x7C, 0x07, 0xD2, 0x83,
 160                               0x60, 0xB5, 0x03},
 161                 /* mode 5 */
 162                 {FRESP_06H_COMPST, 0x78, 0x07, 0xD2, 0x83,
 163                               0x60, 0xB5, 0x03},
 164                 /* mode 6 */
 165                 {FRESP_06H_SVIDEO, 0x59, 0x17, 0x42, 0xA3,
 166                               0x44, 0x75, 0x12},
 167                 /* mode 7 */
 168                 {FRESP_06H_SVIDEO, 0x9A, 0x17, 0xB1, 0x13,
 169                               0x60, 0xB5, 0x14},
 170                 /* mode 8 */
 171                 {FRESP_06H_SVIDEO, 0x3C, 0x27, 0xC1, 0x23,
 172                               0x44, 0x75, 0x21}
 173         };
 174         struct saa7110 *decoder = i2c_get_clientdata(client);
 175         const unsigned char *ptr = modes[chan];
 176
 177         saa7110_write(client, 0x06, ptr[0]);    /* Luminance control    */
 178         saa7110_write(client, 0x20, ptr[1]);    /* Analog Control #1    */
 179         saa7110_write(client, 0x21, ptr[2]);    /* Analog Control #2    */
 180         saa7110_write(client, 0x22, ptr[3]);    /* Mixer Control #1     */
 181         saa7110_write(client, 0x2C, ptr[4]);    /* Mixer Control #2     */
 182         saa7110_write(client, 0x30, ptr[5]);    /* ADCs gain control    */
 183         saa7110_write(client, 0x31, ptr[6]);    /* Mixer Control #3     */
 184         saa7110_write(client, 0x21, ptr[7]);    /* Analog Control #2    */
 185         decoder->input = chan;
 186
 187         return 0;
 188 }
 189
 190 static const unsigned char initseq[1 + SAA7110_NR_REG] = {
 191         0, 0x4C, 0x3C, 0x0D, 0xEF, 0xBD, 0xF2, 0x03, 0x00,
 192         /* 0x08 */ 0xF8, 0xF8, 0x60, 0x60, 0x00, 0x86, 0x18, 0x90,
 193         /* 0x10 */ 0x00, 0x59, 0x40, 0x46, 0x42, 0x1A, 0xFF, 0xDA,
 194         /* 0x18 */ 0xF2, 0x8B, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 195         /* 0x20 */ 0xD9, 0x16, 0x40, 0x41, 0x80, 0x41, 0x80, 0x4F,
 196         /* 0x28 */ 0xFE, 0x01, 0xCF, 0x0F, 0x03, 0x01, 0x03, 0x0C,
 197         /* 0x30 */ 0x44, 0x71, 0x02, 0x8C, 0x02
 198 };
 199
 200 static int
 201 determine_norm (struct i2c_client *client)
 202 {
 203         DEFINE_WAIT(wait);
 204         struct saa7110 *decoder = i2c_get_clientdata(client);
 205         int status;
 206
 207         /* mode changed, start automatic detection */
 208         saa7110_write_block(client, initseq, sizeof(initseq));
 209         saa7110_selmux(client, decoder->input);
 210         prepare_to_wait(&decoder->wq, &wait, TASK_UNINTERRUPTIBLE);
 211         schedule_timeout(msecs_to_jiffies(250));
 212         finish_wait(&decoder->wq, &wait);
 213         status = saa7110_read(client);
 214         if (status & 0x40) {
 215                 dprintk(1, KERN_INFO "%s: status=0x%02x (no signal)\n",
 216                         I2C_NAME(client), status);
 217                 return decoder->norm;   // no change
 218         }
 219         if ((status & 3) == 0) {
 220                 saa7110_write(client, 0x06, 0x83);
 221                 if (status & 0x20) {
 222                         dprintk(1,
 223                                 KERN_INFO
 224                                 "%s: status=0x%02x (NTSC/no color)\n",
 225                                 I2C_NAME(client), status);
 226                         //saa7110_write(client,0x2E,0x81);
 227                         return VIDEO_MODE_NTSC;
 228                 }
 229                 dprintk(1, KERN_INFO "%s: status=0x%02x (PAL/no color)\n",
 230                         I2C_NAME(client), status);
 231                 //saa7110_write(client,0x2E,0x9A);
 232                 return VIDEO_MODE_PAL;
 233         }
 234         //saa7110_write(client,0x06,0x03);
 235         if (status & 0x20) {    /* 60Hz */
 236                 dprintk(1, KERN_INFO "%s: status=0x%02x (NTSC)\n",
 237                         I2C_NAME(client), status);
 238                 saa7110_write(client, 0x0D, 0x86);
 239                 saa7110_write(client, 0x0F, 0x50);
 240                 saa7110_write(client, 0x11, 0x2C);
 241                 //saa7110_write(client,0x2E,0x81);
 242                 return VIDEO_MODE_NTSC;
 243         }
 244
 245         /* 50Hz -> PAL/SECAM */
 246         saa7110_write(client, 0x0D, 0x86);
 247         saa7110_write(client, 0x0F, 0x10);
 248         saa7110_write(client, 0x11, 0x59);
 249         //saa7110_write(client,0x2E,0x9A);
 250
 251         prepare_to_wait(&decoder->wq, &wait, TASK_UNINTERRUPTIBLE);
 252         schedule_timeout(msecs_to_jiffies(250));
 253         finish_wait(&decoder->wq, &wait);
 254
 255         status = saa7110_read(client);
 256         if ((status & 0x03) == 0x01) {
 257                 dprintk(1, KERN_INFO "%s: status=0x%02x (SECAM)\n",
 258                         I2C_NAME(client), status);
 259                 saa7110_write(client, 0x0D, 0x87);
 260                 return VIDEO_MODE_SECAM;
 261         }
 262         dprintk(1, KERN_INFO "%s: status=0x%02x (PAL)\n", I2C_NAME(client),
 263                 status);
 264         return VIDEO_MODE_PAL;
 265 }
 266
 267 static int
 268 saa7110_command (struct i2c_client *client,
 269                  unsigned int       cmd,
 270                  void              *arg)
 271 {
 272         struct saa7110 *decoder = i2c_get_clientdata(client);
 273         int v;
 274
 275         switch (cmd) {
 276         case 0:
 277                 //saa7110_write_block(client, initseq, sizeof(initseq));
 278                 break;
 279
 280         case DECODER_GET_CAPABILITIES:
 281         {
 282                 struct video_decoder_capability *dc = arg;
 283
 284                 dc->flags =
 285                     VIDEO_DECODER_PAL | VIDEO_DECODER_NTSC |
 286                     VIDEO_DECODER_SECAM | VIDEO_DECODER_AUTO;
 287                 dc->inputs = SAA7110_MAX_INPUT;
 288                 dc->outputs = SAA7110_MAX_OUTPUT;
 289         }
 290                 break;
 291
 292         case DECODER_GET_STATUS:
 293         {
 294                 int status;
 295                 int res = 0;
 296
 297                 status = saa7110_read(client);
 298                 dprintk(1, KERN_INFO "%s: status=0x%02x norm=%d\n",
 299                         I2C_NAME(client), status, decoder->norm);
 300                 if (!(status & 0x40))
 301                         res |= DECODER_STATUS_GOOD;
 302                 if (status & 0x03)
 303                         res |= DECODER_STATUS_COLOR;
 304
 305                 switch (decoder->norm) {
 306                 case VIDEO_MODE_NTSC:
 307                         res |= DECODER_STATUS_NTSC;
 308                         break;
 309                 case VIDEO_MODE_PAL:
 310                         res |= DECODER_STATUS_PAL;
 311                         break;
 312                 case VIDEO_MODE_SECAM:
 313                         res |= DECODER_STATUS_SECAM;
 314                         break;
 315                 }
 316                 *(int *) arg = res;
 317         }
 318                 break;
 319
 320         case DECODER_SET_NORM:
 321                 v = *(int *) arg;
 322                 if (decoder->norm != v) {
 323                         decoder->norm = v;
 324                         //saa7110_write(client, 0x06, 0x03);
 325                         switch (v) {
 326                         case VIDEO_MODE_NTSC:
 327                                 saa7110_write(client, 0x0D, 0x86);
 328                                 saa7110_write(client, 0x0F, 0x50);
 329                                 saa7110_write(client, 0x11, 0x2C);
 330                                 //saa7110_write(client, 0x2E, 0x81);
 331                                 dprintk(1,
 332                                         KERN_INFO "%s: switched to NTSC\n",
 333                                         I2C_NAME(client));
 334                                 break;
 335                         case VIDEO_MODE_PAL:
 336                                 saa7110_write(client, 0x0D, 0x86);
 337                                 saa7110_write(client, 0x0F, 0x10);
 338                                 saa7110_write(client, 0x11, 0x59);
 339                                 //saa7110_write(client, 0x2E, 0x9A);
 340                                 dprintk(1,
 341                                         KERN_INFO "%s: switched to PAL\n",
 342                                         I2C_NAME(client));
 343                                 break;
 344                         case VIDEO_MODE_SECAM:
 345                                 saa7110_write(client, 0x0D, 0x87);
 346                                 saa7110_write(client, 0x0F, 0x10);
 347                                 saa7110_write(client, 0x11, 0x59);
 348                                 //saa7110_write(client, 0x2E, 0x9A);
 349                                 dprintk(1,
 350                                         KERN_INFO
 351                                         "%s: switched to SECAM\n",
 352                                         I2C_NAME(client));
 353                                 break;
 354                         case VIDEO_MODE_AUTO:
 355                                 dprintk(1,
 356                                         KERN_INFO
 357                                         "%s: TV standard detection...\n",
 358                                         I2C_NAME(client));
 359                                 decoder->norm = determine_norm(client);
 360                                 *(int *) arg = decoder->norm;
 361                                 break;
 362                         default:
 363                                 return -EPERM;
 364                         }
 365                 }
 366                 break;
 367
 368         case DECODER_SET_INPUT:
 369                 v = *(int *) arg;
 370                 if (v < 0 || v > SAA7110_MAX_INPUT) {
 371                         dprintk(1,
 372                                 KERN_INFO "%s: input=%d not available\n",
 373                                 I2C_NAME(client), v);
 374                         return -EINVAL;
 375                 }
 376                 if (decoder->input != v) {
 377                         saa7110_selmux(client, v);
 378                         dprintk(1, KERN_INFO "%s: switched to input=%d\n",
 379                                 I2C_NAME(client), v);
 380                 }
 381                 break;
 382
 383         case DECODER_SET_OUTPUT:
 384                 v = *(int *) arg;
 385                 /* not much choice of outputs */
 386                 if (v != 0)
 387                         return -EINVAL;
 388                 break;
 389
 390         case DECODER_ENABLE_OUTPUT:
 391                 v = *(int *) arg;
 392                 if (decoder->enable != v) {
 393                         decoder->enable = v;
 394                         saa7110_write(client, 0x0E, v ? 0x18 : 0x80);
 395                         dprintk(1, KERN_INFO "%s: YUV %s\n", I2C_NAME(client),
 396                                 v ? "on" : "off");
 397                 }
 398                 break;
 399
 400         case DECODER_SET_PICTURE:
 401         {
 402                 struct video_picture *pic = arg;
 403
 404                 if (decoder->bright != pic->brightness) {
 405                         /* We want 0 to 255 we get 0-65535 */
 406                         decoder->bright = pic->brightness;
 407                         saa7110_write(client, 0x19, decoder->bright >> 8);
 408                 }
 409                 if (decoder->contrast != pic->contrast) {
 410                         /* We want 0 to 127 we get 0-65535 */
 411                         decoder->contrast = pic->contrast;
 412                         saa7110_write(client, 0x13,
 413                                       decoder->contrast >> 9);
 414                 }
 415                 if (decoder->sat != pic->colour) {
 416                         /* We want 0 to 127 we get 0-65535 */
 417                         decoder->sat = pic->colour;
 418                         saa7110_write(client, 0x12, decoder->sat >> 9);
 419                 }
 420                 if (decoder->hue != pic->hue) {
 421                         /* We want -128 to 127 we get 0-65535 */
 422                         decoder->hue = pic->hue;
 423                         saa7110_write(client, 0x07,
 424                                       (decoder->hue >> 8) - 128);
 425                 }
 426         }
 427                 break;
 428
 429         case DECODER_DUMP:
 430                 for (v = 0; v < SAA7110_NR_REG; v += 16) {
 431                         int j;
 432                         dprintk(1, KERN_DEBUG "%s: %02x:", I2C_NAME(client),
 433                                 v);
 434                         for (j = 0; j < 16 && v + j < SAA7110_NR_REG; j++)
 435                                 dprintk(1, " %02x", decoder->reg[v + j]);
 436                         dprintk(1, "\n");
 437                 }
 438                 break;
 439
 440         default:
 441                 dprintk(1, KERN_INFO "unknown saa7110_command??(%d)\n",
 442                         cmd);
 443                 return -EINVAL;
 444         }
 445         return 0;
 446 }
 447
 448 /* ----------------------------------------------------------------------- */
 449
 450 /*
 451  * Generic i2c probe
 452  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
 453  */
 454 static unsigned short normal_i2c[] = {
 455         I2C_SAA7110 >> 1,
 456         (I2C_SAA7110 >> 1) + 1,
 457         I2C_CLIENT_END
 458 };
 459
 460 static unsigned short ignore = I2C_CLIENT_END;
 461
 462 static struct i2c_client_address_data addr_data = {
 463         .normal_i2c             = normal_i2c,
 464         .probe                  = &ignore,
 465         .ignore                 = &ignore,
 466 };
 467
 468 static struct i2c_driver i2c_driver_saa7110;
 469
 470 static int
 471 saa7110_detect_client (struct i2c_adapter *adapter,
 472                        int                 address,
 473                        int                 kind)
 474 {
 475         struct i2c_client *client;
 476         struct saa7110 *decoder;
 477         int rv;
 478
 479         dprintk(1,
 480                 KERN_INFO
 481                 "saa7110.c: detecting saa7110 client on address 0x%x\n",
 482                 address << 1);
 483
 484         /* Check if the adapter supports the needed features */
 485         if (!i2c_check_functionality
 486             (adapter,
 487              I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
 488                 return 0;
 489
 490         client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
 491         if (!client)
 492                 return -ENOMEM;
 493         client->addr = address;
 494         client->adapter = adapter;
 495         client->driver = &i2c_driver_saa7110;
 496         strlcpy(I2C_NAME(client), "saa7110", sizeof(I2C_NAME(client)));
 497
 498         decoder = kzalloc(sizeof(struct saa7110), GFP_KERNEL);
 499         if (!decoder) {
 500                 kfree(client);
 501                 return -ENOMEM;
 502         }
 503         decoder->norm = VIDEO_MODE_PAL;
 504         decoder->input = 0;
 505         decoder->enable = 1;
 506         decoder->bright = 32768;
 507         decoder->contrast = 32768;
 508         decoder->hue = 32768;
 509         decoder->sat = 32768;
 510         init_waitqueue_head(&decoder->wq);
 511         i2c_set_clientdata(client, decoder);
 512
 513         rv = i2c_attach_client(client);
 514         if (rv) {
 515                 kfree(client);
 516                 kfree(decoder);
 517                 return rv;
 518         }
 519
 520         rv = saa7110_write_block(client, initseq, sizeof(initseq));
 521         if (rv < 0)
 522                 dprintk(1, KERN_ERR "%s_attach: init status %d\n",
 523                         I2C_NAME(client), rv);
 524         else {
 525                 int ver, status;
 526                 saa7110_write(client, 0x21, 0x10);
 527                 saa7110_write(client, 0x0e, 0x18);
 528                 saa7110_write(client, 0x0D, 0x04);
 529                 ver = saa7110_read(client);
 530                 saa7110_write(client, 0x0D, 0x06);
 531                 //mdelay(150);
 532                 status = saa7110_read(client);
 533                 dprintk(1,
 534                         KERN_INFO
 535                         "%s_attach: SAA7110A version %x at 0x%02x, status=0x%02x\n",
 536                         I2C_NAME(client), ver, client->addr << 1, status);
 537                 saa7110_write(client, 0x0D, 0x86);
 538                 saa7110_write(client, 0x0F, 0x10);
 539                 saa7110_write(client, 0x11, 0x59);
 540                 //saa7110_write(client, 0x2E, 0x9A);
 541         }
 542
 543         //saa7110_selmux(client,0);
 544         //determine_norm(client);
 545         /* setup and implicit mode 0 select has been performed */
 546
 547         return 0;
 548 }
 549
 550 static int
 551 saa7110_attach_adapter (struct i2c_adapter *adapter)
 552 {
 553         dprintk(1,
 554                 KERN_INFO
 555                 "saa7110.c: starting probe for adapter %s (0x%x)\n",
 556                 I2C_NAME(adapter), adapter->id);
 557         return i2c_probe(adapter, &addr_data, &saa7110_detect_client);
 558 }
 559
 560 static int
 561 saa7110_detach_client (struct i2c_client *client)
 562 {
 563         struct saa7110 *decoder = i2c_get_clientdata(client);
 564         int err;
 565
 566         err = i2c_detach_client(client);
 567         if (err) {
 568                 return err;
 569         }
 570
 571         kfree(decoder);
 572         kfree(client);
 573
 574         return 0;
 575 }
 576
 577 /* ----------------------------------------------------------------------- */
 578
 579 static struct i2c_driver i2c_driver_saa7110 = {
 580         .driver = {
 581                 .name = "saa7110",
 582         },
 583
 584         .id = I2C_DRIVERID_SAA7110,
 585
 586         .attach_adapter = saa7110_attach_adapter,
 587         .detach_client = saa7110_detach_client,
 588         .command = saa7110_command,
 589 };
 590
 591 static int __init
 592 saa7110_init (void)
 593 {
 594         return i2c_add_driver(&i2c_driver_saa7110);
 595 }
 596
 597 static void __exit
 598 saa7110_exit (void)
 599 {
 600         i2c_del_driver(&i2c_driver_saa7110);
 601 }
 602
 603 module_init(saa7110_init);
 604 module_exit(saa7110_exit);