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 #include <linux/i2c-dev.h>
  43
  44 #define I2C_NAME(s) (s)->name
  45
  46 #include <linux/videodev.h>
  47 #include <linux/video_decoder.h>
  48
  49 static int debug = 0;
  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                 struct i2c_msg msg;
 112
 113                 msg.len = len;
 114                 msg.buf = (char *) data;
 115                 msg.addr = client->addr;
 116                 msg.flags = 0;
 117                 ret = i2c_transfer(client->adapter, &msg, 1);
 118
 119                 /* Cache the written data */
 120                 memcpy(decoder->reg + reg, data + 1, len - 1);
 121         } else {
 122                 for (++data, --len; len; len--) {
 123                         if ((ret = saa7110_write(client, reg++,
 124                                                  *data++)) < 0)
 125                                 break;
 126                 }
 127         }
 128
 129         return ret;
 130 }
 131
 132 static inline int
 133 saa7110_read (struct i2c_client *client)
 134 {
 135         return i2c_smbus_read_byte(client);
 136 }
 137
 138 /* ----------------------------------------------------------------------- */
 139 /* SAA7110 functions                                                       */
 140 /* ----------------------------------------------------------------------- */
 141
 142 #define FRESP_06H_COMPST 0x03   //0x13
 143 #define FRESP_06H_SVIDEO 0x83   //0xC0
 144
 145
 146 static int
 147 saa7110_selmux (struct i2c_client *client,
 148                 int                chan)
 149 {
 150         static const unsigned char modes[9][8] = {
 151                 /* mode 0 */
 152                 {FRESP_06H_COMPST, 0xD9, 0x17, 0x40, 0x03,
 153                               0x44, 0x75, 0x16},
 154                 /* mode 1 */
 155                 {FRESP_06H_COMPST, 0xD8, 0x17, 0x40, 0x03,
 156                               0x44, 0x75, 0x16},
 157                 /* mode 2 */
 158                 {FRESP_06H_COMPST, 0xBA, 0x07, 0x91, 0x03,
 159                               0x60, 0xB5, 0x05},
 160                 /* mode 3 */
 161                 {FRESP_06H_COMPST, 0xB8, 0x07, 0x91, 0x03,
 162                               0x60, 0xB5, 0x05},
 163                 /* mode 4 */
 164                 {FRESP_06H_COMPST, 0x7C, 0x07, 0xD2, 0x83,
 165                               0x60, 0xB5, 0x03},
 166                 /* mode 5 */
 167                 {FRESP_06H_COMPST, 0x78, 0x07, 0xD2, 0x83,
 168                               0x60, 0xB5, 0x03},
 169                 /* mode 6 */
 170                 {FRESP_06H_SVIDEO, 0x59, 0x17, 0x42, 0xA3,
 171                               0x44, 0x75, 0x12},
 172                 /* mode 7 */
 173                 {FRESP_06H_SVIDEO, 0x9A, 0x17, 0xB1, 0x13,
 174                               0x60, 0xB5, 0x14},
 175                 /* mode 8 */
 176                 {FRESP_06H_SVIDEO, 0x3C, 0x27, 0xC1, 0x23,
 177                               0x44, 0x75, 0x21}
 178         };
 179         struct saa7110 *decoder = i2c_get_clientdata(client);
 180         const unsigned char *ptr = modes[chan];
 181
 182         saa7110_write(client, 0x06, ptr[0]);    /* Luminance control    */
 183         saa7110_write(client, 0x20, ptr[1]);    /* Analog Control #1    */
 184         saa7110_write(client, 0x21, ptr[2]);    /* Analog Control #2    */
 185         saa7110_write(client, 0x22, ptr[3]);    /* Mixer Control #1     */
 186         saa7110_write(client, 0x2C, ptr[4]);    /* Mixer Control #2     */
 187         saa7110_write(client, 0x30, ptr[5]);    /* ADCs gain control    */
 188         saa7110_write(client, 0x31, ptr[6]);    /* Mixer Control #3     */
 189         saa7110_write(client, 0x21, ptr[7]);    /* Analog Control #2    */
 190         decoder->input = chan;
 191
 192         return 0;
 193 }
 194
 195 static const unsigned char initseq[1 + SAA7110_NR_REG] = {
 196         0, 0x4C, 0x3C, 0x0D, 0xEF, 0xBD, 0xF2, 0x03, 0x00,
 197         /* 0x08 */ 0xF8, 0xF8, 0x60, 0x60, 0x00, 0x86, 0x18, 0x90,
 198         /* 0x10 */ 0x00, 0x59, 0x40, 0x46, 0x42, 0x1A, 0xFF, 0xDA,
 199         /* 0x18 */ 0xF2, 0x8B, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 200         /* 0x20 */ 0xD9, 0x16, 0x40, 0x41, 0x80, 0x41, 0x80, 0x4F,
 201         /* 0x28 */ 0xFE, 0x01, 0xCF, 0x0F, 0x03, 0x01, 0x03, 0x0C,
 202         /* 0x30 */ 0x44, 0x71, 0x02, 0x8C, 0x02
 203 };
 204
 205 static int
 206 determine_norm (struct i2c_client *client)
 207 {
 208         DEFINE_WAIT(wait);
 209         struct saa7110 *decoder = i2c_get_clientdata(client);
 210         int status;
 211
 212         /* mode changed, start automatic detection */
 213         saa7110_write_block(client, initseq, sizeof(initseq));
 214         saa7110_selmux(client, decoder->input);
 215         prepare_to_wait(&decoder->wq, &wait, TASK_UNINTERRUPTIBLE);
 216         schedule_timeout(HZ/4);
 217         finish_wait(&decoder->wq, &wait);
 218         status = saa7110_read(client);
 219         if (status & 0x40) {
 220                 dprintk(1, KERN_INFO "%s: status=0x%02x (no signal)\n",
 221                         I2C_NAME(client), status);
 222                 return decoder->norm;   // no change
 223         }
 224         if ((status & 3) == 0) {
 225                 saa7110_write(client, 0x06, 0x83);
 226                 if (status & 0x20) {
 227                         dprintk(1,
 228                                 KERN_INFO
 229                                 "%s: status=0x%02x (NTSC/no color)\n",
 230                                 I2C_NAME(client), status);
 231                         //saa7110_write(client,0x2E,0x81);
 232                         return VIDEO_MODE_NTSC;
 233                 }
 234                 dprintk(1, KERN_INFO "%s: status=0x%02x (PAL/no color)\n",
 235                         I2C_NAME(client), status);
 236                 //saa7110_write(client,0x2E,0x9A);
 237                 return VIDEO_MODE_PAL;
 238         }
 239         //saa7110_write(client,0x06,0x03);
 240         if (status & 0x20) {    /* 60Hz */
 241                 dprintk(1, KERN_INFO "%s: status=0x%02x (NTSC)\n",
 242                         I2C_NAME(client), status);
 243                 saa7110_write(client, 0x0D, 0x86);
 244                 saa7110_write(client, 0x0F, 0x50);
 245                 saa7110_write(client, 0x11, 0x2C);
 246                 //saa7110_write(client,0x2E,0x81);
 247                 return VIDEO_MODE_NTSC;
 248         }
 249
 250         /* 50Hz -> PAL/SECAM */
 251         saa7110_write(client, 0x0D, 0x86);
 252         saa7110_write(client, 0x0F, 0x10);
 253         saa7110_write(client, 0x11, 0x59);
 254         //saa7110_write(client,0x2E,0x9A);
 255
 256         prepare_to_wait(&decoder->wq, &wait, TASK_UNINTERRUPTIBLE);
 257         schedule_timeout(HZ/4);
 258         finish_wait(&decoder->wq, &wait);
 259
 260         status = saa7110_read(client);
 261         if ((status & 0x03) == 0x01) {
 262                 dprintk(1, KERN_INFO "%s: status=0x%02x (SECAM)\n",
 263                         I2C_NAME(client), status);
 264                 saa7110_write(client, 0x0D, 0x87);
 265                 return VIDEO_MODE_SECAM;
 266         }
 267         dprintk(1, KERN_INFO "%s: status=0x%02x (PAL)\n", I2C_NAME(client),
 268                 status);
 269         return VIDEO_MODE_PAL;
 270 }
 271
 272 static int
 273 saa7110_command (struct i2c_client *client,
 274                  unsigned int       cmd,
 275                  void              *arg)
 276 {
 277         struct saa7110 *decoder = i2c_get_clientdata(client);
 278         int v;
 279
 280         switch (cmd) {
 281         case 0:
 282                 //saa7110_write_block(client, initseq, sizeof(initseq));
 283                 break;
 284
 285         case DECODER_GET_CAPABILITIES:
 286         {
 287                 struct video_decoder_capability *dc = arg;
 288
 289                 dc->flags =
 290                     VIDEO_DECODER_PAL | VIDEO_DECODER_NTSC |
 291                     VIDEO_DECODER_SECAM | VIDEO_DECODER_AUTO;
 292                 dc->inputs = SAA7110_MAX_INPUT;
 293                 dc->outputs = SAA7110_MAX_OUTPUT;
 294         }
 295                 break;
 296
 297         case DECODER_GET_STATUS:
 298         {
 299                 int status;
 300                 int res = 0;
 301
 302                 status = saa7110_read(client);
 303                 dprintk(1, KERN_INFO "%s: status=0x%02x norm=%d\n",
 304                         I2C_NAME(client), status, decoder->norm);
 305                 if (!(status & 0x40))
 306                         res |= DECODER_STATUS_GOOD;
 307                 if (status & 0x03)
 308                         res |= DECODER_STATUS_COLOR;
 309
 310                 switch (decoder->norm) {
 311                 case VIDEO_MODE_NTSC:
 312                         res |= DECODER_STATUS_NTSC;
 313                         break;
 314                 case VIDEO_MODE_PAL:
 315                         res |= DECODER_STATUS_PAL;
 316                         break;
 317                 case VIDEO_MODE_SECAM:
 318                         res |= DECODER_STATUS_SECAM;
 319                         break;
 320                 }
 321                 *(int *) arg = res;
 322         }
 323                 break;
 324
 325         case DECODER_SET_NORM:
 326                 v = *(int *) arg;
 327                 if (decoder->norm != v) {
 328                         decoder->norm = v;
 329                         //saa7110_write(client, 0x06, 0x03);
 330                         switch (v) {
 331                         case VIDEO_MODE_NTSC:
 332                                 saa7110_write(client, 0x0D, 0x86);
 333                                 saa7110_write(client, 0x0F, 0x50);
 334                                 saa7110_write(client, 0x11, 0x2C);
 335                                 //saa7110_write(client, 0x2E, 0x81);
 336                                 dprintk(1,
 337                                         KERN_INFO "%s: switched to NTSC\n",
 338                                         I2C_NAME(client));
 339                                 break;
 340                         case VIDEO_MODE_PAL:
 341                                 saa7110_write(client, 0x0D, 0x86);
 342                                 saa7110_write(client, 0x0F, 0x10);
 343                                 saa7110_write(client, 0x11, 0x59);
 344                                 //saa7110_write(client, 0x2E, 0x9A);
 345                                 dprintk(1,
 346                                         KERN_INFO "%s: switched to PAL\n",
 347                                         I2C_NAME(client));
 348                                 break;
 349                         case VIDEO_MODE_SECAM:
 350                                 saa7110_write(client, 0x0D, 0x87);
 351                                 saa7110_write(client, 0x0F, 0x10);
 352                                 saa7110_write(client, 0x11, 0x59);
 353                                 //saa7110_write(client, 0x2E, 0x9A);
 354                                 dprintk(1,
 355                                         KERN_INFO
 356                                         "%s: switched to SECAM\n",
 357                                         I2C_NAME(client));
 358                                 break;
 359                         case VIDEO_MODE_AUTO:
 360                                 dprintk(1,
 361                                         KERN_INFO
 362                                         "%s: TV standard detection...\n",
 363                                         I2C_NAME(client));
 364                                 decoder->norm = determine_norm(client);
 365                                 *(int *) arg = decoder->norm;
 366                                 break;
 367                         default:
 368                                 return -EPERM;
 369                         }
 370                 }
 371                 break;
 372
 373         case DECODER_SET_INPUT:
 374                 v = *(int *) arg;
 375                 if (v < 0 || v > SAA7110_MAX_INPUT) {
 376                         dprintk(1,
 377                                 KERN_INFO "%s: input=%d not available\n",
 378                                 I2C_NAME(client), v);
 379                         return -EINVAL;
 380                 }
 381                 if (decoder->input != v) {
 382                         saa7110_selmux(client, v);
 383                         dprintk(1, KERN_INFO "%s: switched to input=%d\n",
 384                                 I2C_NAME(client), v);
 385                 }
 386                 break;
 387
 388         case DECODER_SET_OUTPUT:
 389                 v = *(int *) arg;
 390                 /* not much choice of outputs */
 391                 if (v != 0)
 392                         return -EINVAL;
 393                 break;
 394
 395         case DECODER_ENABLE_OUTPUT:
 396                 v = *(int *) arg;
 397                 if (decoder->enable != v) {
 398                         decoder->enable = v;
 399                         saa7110_write(client, 0x0E, v ? 0x18 : 0x80);
 400                         dprintk(1, KERN_INFO "%s: YUV %s\n", I2C_NAME(client),
 401                                 v ? "on" : "off");
 402                 }
 403                 break;
 404
 405         case DECODER_SET_PICTURE:
 406         {
 407                 struct video_picture *pic = arg;
 408
 409                 if (decoder->bright != pic->brightness) {
 410                         /* We want 0 to 255 we get 0-65535 */
 411                         decoder->bright = pic->brightness;
 412                         saa7110_write(client, 0x19, decoder->bright >> 8);
 413                 }
 414                 if (decoder->contrast != pic->contrast) {
 415                         /* We want 0 to 127 we get 0-65535 */
 416                         decoder->contrast = pic->contrast;
 417                         saa7110_write(client, 0x13,
 418                                       decoder->contrast >> 9);
 419                 }
 420                 if (decoder->sat != pic->colour) {
 421                         /* We want 0 to 127 we get 0-65535 */
 422                         decoder->sat = pic->colour;
 423                         saa7110_write(client, 0x12, decoder->sat >> 9);
 424                 }
 425                 if (decoder->hue != pic->hue) {
 426                         /* We want -128 to 127 we get 0-65535 */
 427                         decoder->hue = pic->hue;
 428                         saa7110_write(client, 0x07,
 429                                       (decoder->hue >> 8) - 128);
 430                 }
 431         }
 432                 break;
 433
 434         case DECODER_DUMP:
 435                 for (v = 0; v < 0x34; v += 16) {
 436                         int j;
 437                         dprintk(1, KERN_INFO "%s: %03x\n", I2C_NAME(client),
 438                                 v);
 439                         for (j = 0; j < 16; j++) {
 440                                 dprintk(1, KERN_INFO " %02x",
 441                                         decoder->reg[v + j]);
 442                         }
 443                         dprintk(1, KERN_INFO "\n");
 444                 }
 445                 break;
 446
 447         default:
 448                 dprintk(1, KERN_INFO "unknown saa7110_command??(%d)\n",
 449                         cmd);
 450                 return -EINVAL;
 451         }
 452         return 0;
 453 }
 454
 455 /* ----------------------------------------------------------------------- */
 456
 457 /*
 458  * Generic i2c probe
 459  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
 460  */
 461 static unsigned short normal_i2c[] = {
 462         I2C_SAA7110 >> 1,
 463         (I2C_SAA7110 >> 1) + 1,
 464         I2C_CLIENT_END
 465 };
 466
 467 static unsigned short ignore = I2C_CLIENT_END;
 468
 469 static struct i2c_client_address_data addr_data = {
 470         .normal_i2c             = normal_i2c,
 471         .probe                  = &ignore,
 472         .ignore                 = &ignore,
 473 };
 474
 475 static struct i2c_driver i2c_driver_saa7110;
 476
 477 static int
 478 saa7110_detect_client (struct i2c_adapter *adapter,
 479                        int                 address,
 480                        int                 kind)
 481 {
 482         struct i2c_client *client;
 483         struct saa7110 *decoder;
 484         int rv;
 485
 486         dprintk(1,
 487                 KERN_INFO
 488                 "saa7110.c: detecting saa7110 client on address 0x%x\n",
 489                 address << 1);
 490
 491         /* Check if the adapter supports the needed features */
 492         if (!i2c_check_functionality
 493             (adapter,
 494              I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
 495                 return 0;
 496
 497         client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
 498         if (client == 0)
 499                 return -ENOMEM;
 500         client->addr = address;
 501         client->adapter = adapter;
 502         client->driver = &i2c_driver_saa7110;
 503         strlcpy(I2C_NAME(client), "saa7110", sizeof(I2C_NAME(client)));
 504
 505         decoder = kzalloc(sizeof(struct saa7110), GFP_KERNEL);
 506         if (decoder == 0) {
 507                 kfree(client);
 508                 return -ENOMEM;
 509         }
 510         decoder->norm = VIDEO_MODE_PAL;
 511         decoder->input = 0;
 512         decoder->enable = 1;
 513         decoder->bright = 32768;
 514         decoder->contrast = 32768;
 515         decoder->hue = 32768;
 516         decoder->sat = 32768;
 517         init_waitqueue_head(&decoder->wq);
 518         i2c_set_clientdata(client, decoder);
 519
 520         rv = i2c_attach_client(client);
 521         if (rv) {
 522                 kfree(client);
 523                 kfree(decoder);
 524                 return rv;
 525         }
 526
 527         rv = saa7110_write_block(client, initseq, sizeof(initseq));
 528         if (rv < 0)
 529                 dprintk(1, KERN_ERR "%s_attach: init status %d\n",
 530                         I2C_NAME(client), rv);
 531         else {
 532                 int ver, status;
 533                 saa7110_write(client, 0x21, 0x10);
 534                 saa7110_write(client, 0x0e, 0x18);
 535                 saa7110_write(client, 0x0D, 0x04);
 536                 ver = saa7110_read(client);
 537                 saa7110_write(client, 0x0D, 0x06);
 538                 //mdelay(150);
 539                 status = saa7110_read(client);
 540                 dprintk(1,
 541                         KERN_INFO
 542                         "%s_attach: SAA7110A version %x at 0x%02x, status=0x%02x\n",
 543                         I2C_NAME(client), ver, client->addr << 1, status);
 544                 saa7110_write(client, 0x0D, 0x86);
 545                 saa7110_write(client, 0x0F, 0x10);
 546                 saa7110_write(client, 0x11, 0x59);
 547                 //saa7110_write(client, 0x2E, 0x9A);
 548         }
 549
 550         //saa7110_selmux(client,0);
 551         //determine_norm(client);
 552         /* setup and implicit mode 0 select has been performed */
 553
 554         return 0;
 555 }
 556
 557 static int
 558 saa7110_attach_adapter (struct i2c_adapter *adapter)
 559 {
 560         dprintk(1,
 561                 KERN_INFO
 562                 "saa7110.c: starting probe for adapter %s (0x%x)\n",
 563                 I2C_NAME(adapter), adapter->id);
 564         return i2c_probe(adapter, &addr_data, &saa7110_detect_client);
 565 }
 566
 567 static int
 568 saa7110_detach_client (struct i2c_client *client)
 569 {
 570         struct saa7110 *decoder = i2c_get_clientdata(client);
 571         int err;
 572
 573         err = i2c_detach_client(client);
 574         if (err) {
 575                 return err;
 576         }
 577
 578         kfree(decoder);
 579         kfree(client);
 580
 581         return 0;
 582 }
 583
 584 /* ----------------------------------------------------------------------- */
 585
 586 static struct i2c_driver i2c_driver_saa7110 = {
 587         .driver = {
 588                 .name = "saa7110",
 589         },
 590
 591         .id = I2C_DRIVERID_SAA7110,
 592
 593         .attach_adapter = saa7110_attach_adapter,
 594         .detach_client = saa7110_detach_client,
 595         .command = saa7110_command,
 596 };
 597
 598 static int __init
 599 saa7110_init (void)
 600 {
 601         return i2c_add_driver(&i2c_driver_saa7110);
 602 }
 603
 604 static void __exit
 605 saa7110_exit (void)
 606 {
 607         i2c_del_driver(&i2c_driver_saa7110);
 608 }
 609
 610 module_init(saa7110_init);
 611 module_exit(saa7110_exit);