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 <linux/video_decoder.h>
  47
  48 static int debug = 0;
  49 module_param(debug, int, 0);
  50 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  51
  52 #define dprintk(num, format, args...) \
  53         do { \
  54                 if (debug >= num) \
  55                         printk(format, ##args); \
  56         } while (0)
  57
  58 #define SAA7110_MAX_INPUT       9       /* 6 CVBS, 3 SVHS */
  59 #define SAA7110_MAX_OUTPUT      0       /* its a decoder only */
  60
  61 #define I2C_SAA7110             0x9C    /* or 0x9E */
  62
  63 #define SAA7110_NR_REG          0x35
  64
  65 struct saa7110 {
  66         u8 reg[SAA7110_NR_REG];
  67
  68         int norm;
  69         int input;
  70         int enable;
  71         int bright;
  72         int contrast;
  73         int hue;
  74         int sat;
  75
  76         wait_queue_head_t wq;
  77 };
  78
  79 /* ----------------------------------------------------------------------- */
  80 /* I2C support functions                                                   */
  81 /* ----------------------------------------------------------------------- */
  82
  83 static int
  84 saa7110_write (struct i2c_client *client,
  85                u8                 reg,
  86                u8                 value)
  87 {
  88         struct saa7110 *decoder = i2c_get_clientdata(client);
  89
  90         decoder->reg[reg] = value;
  91         return i2c_smbus_write_byte_data(client, reg, value);
  92 }
  93
  94 static int
  95 saa7110_write_block (struct i2c_client *client,
  96                      const u8          *data,
  97                      unsigned int       len)
  98 {
  99         int ret = -1;
 100         u8 reg = *data;         /* first register to write to */
 101
 102         /* Sanity check */
 103         if (reg + (len - 1) > SAA7110_NR_REG)
 104                 return ret;
 105
 106         /* the saa7110 has an autoincrement function, use it if
 107          * the adapter understands raw I2C */
 108         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 109                 struct saa7110 *decoder = i2c_get_clientdata(client);
 110                 struct i2c_msg msg;
 111
 112                 msg.len = len;
 113                 msg.buf = (char *) data;
 114                 msg.addr = client->addr;
 115                 msg.flags = 0;
 116                 ret = i2c_transfer(client->adapter, &msg, 1);
 117
 118                 /* Cache the written data */
 119                 memcpy(decoder->reg + reg, data + 1, len - 1);
 120         } else {
 121                 for (++data, --len; len; len--) {
 122                         if ((ret = saa7110_write(client, reg++,
 123                                                  *data++)) < 0)
 124                                 break;
 125                 }
 126         }
 127
 128         return ret;
 129 }
 130
 131 static inline int
 132 saa7110_read (struct i2c_client *client)
 133 {
 134         return i2c_smbus_read_byte(client);
 135 }
 136
 137 /* ----------------------------------------------------------------------- */
 138 /* SAA7110 functions                                                       */
 139 /* ----------------------------------------------------------------------- */
 140
 141 #define FRESP_06H_COMPST 0x03   //0x13
 142 #define FRESP_06H_SVIDEO 0x83   //0xC0
 143
 144
 145 static int
 146 saa7110_selmux (struct i2c_client *client,
 147                 int                chan)
 148 {
 149         static const unsigned char modes[9][8] = {
 150                 /* mode 0 */
 151                 {FRESP_06H_COMPST, 0xD9, 0x17, 0x40, 0x03,
 152                               0x44, 0x75, 0x16},
 153                 /* mode 1 */
 154                 {FRESP_06H_COMPST, 0xD8, 0x17, 0x40, 0x03,
 155                               0x44, 0x75, 0x16},
 156                 /* mode 2 */
 157                 {FRESP_06H_COMPST, 0xBA, 0x07, 0x91, 0x03,
 158                               0x60, 0xB5, 0x05},
 159                 /* mode 3 */
 160                 {FRESP_06H_COMPST, 0xB8, 0x07, 0x91, 0x03,
 161                               0x60, 0xB5, 0x05},
 162                 /* mode 4 */
 163                 {FRESP_06H_COMPST, 0x7C, 0x07, 0xD2, 0x83,
 164                               0x60, 0xB5, 0x03},
 165                 /* mode 5 */
 166                 {FRESP_06H_COMPST, 0x78, 0x07, 0xD2, 0x83,
 167                               0x60, 0xB5, 0x03},
 168                 /* mode 6 */
 169                 {FRESP_06H_SVIDEO, 0x59, 0x17, 0x42, 0xA3,
 170                               0x44, 0x75, 0x12},
 171                 /* mode 7 */
 172                 {FRESP_06H_SVIDEO, 0x9A, 0x17, 0xB1, 0x13,
 173                               0x60, 0xB5, 0x14},
 174                 /* mode 8 */
 175                 {FRESP_06H_SVIDEO, 0x3C, 0x27, 0xC1, 0x23,
 176                               0x44, 0x75, 0x21}
 177         };
 178         struct saa7110 *decoder = i2c_get_clientdata(client);
 179         const unsigned char *ptr = modes[chan];
 180
 181         saa7110_write(client, 0x06, ptr[0]);    /* Luminance control    */
 182         saa7110_write(client, 0x20, ptr[1]);    /* Analog Control #1    */
 183         saa7110_write(client, 0x21, ptr[2]);    /* Analog Control #2    */
 184         saa7110_write(client, 0x22, ptr[3]);    /* Mixer Control #1     */
 185         saa7110_write(client, 0x2C, ptr[4]);    /* Mixer Control #2     */
 186         saa7110_write(client, 0x30, ptr[5]);    /* ADCs gain control    */
 187         saa7110_write(client, 0x31, ptr[6]);    /* Mixer Control #3     */
 188         saa7110_write(client, 0x21, ptr[7]);    /* Analog Control #2    */
 189         decoder->input = chan;
 190
 191         return 0;
 192 }
 193
 194 static const unsigned char initseq[1 + SAA7110_NR_REG] = {
 195         0, 0x4C, 0x3C, 0x0D, 0xEF, 0xBD, 0xF2, 0x03, 0x00,
 196         /* 0x08 */ 0xF8, 0xF8, 0x60, 0x60, 0x00, 0x86, 0x18, 0x90,
 197         /* 0x10 */ 0x00, 0x59, 0x40, 0x46, 0x42, 0x1A, 0xFF, 0xDA,
 198         /* 0x18 */ 0xF2, 0x8B, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 199         /* 0x20 */ 0xD9, 0x16, 0x40, 0x41, 0x80, 0x41, 0x80, 0x4F,
 200         /* 0x28 */ 0xFE, 0x01, 0xCF, 0x0F, 0x03, 0x01, 0x03, 0x0C,
 201         /* 0x30 */ 0x44, 0x71, 0x02, 0x8C, 0x02
 202 };
 203
 204 static int
 205 determine_norm (struct i2c_client *client)
 206 {
 207         DEFINE_WAIT(wait);
 208         struct saa7110 *decoder = i2c_get_clientdata(client);
 209         int status;
 210
 211         /* mode changed, start automatic detection */
 212         saa7110_write_block(client, initseq, sizeof(initseq));
 213         saa7110_selmux(client, decoder->input);
 214         prepare_to_wait(&decoder->wq, &wait, TASK_UNINTERRUPTIBLE);
 215         schedule_timeout(HZ/4);
 216         finish_wait(&decoder->wq, &wait);
 217         status = saa7110_read(client);
 218         if (status & 0x40) {
 219                 dprintk(1, KERN_INFO "%s: status=0x%02x (no signal)\n",
 220                         I2C_NAME(client), status);
 221                 return decoder->norm;   // no change
 222         }
 223         if ((status & 3) == 0) {
 224                 saa7110_write(client, 0x06, 0x83);
 225                 if (status & 0x20) {
 226                         dprintk(1,
 227                                 KERN_INFO
 228                                 "%s: status=0x%02x (NTSC/no color)\n",
 229                                 I2C_NAME(client), status);
 230                         //saa7110_write(client,0x2E,0x81);
 231                         return VIDEO_MODE_NTSC;
 232                 }
 233                 dprintk(1, KERN_INFO "%s: status=0x%02x (PAL/no color)\n",
 234                         I2C_NAME(client), status);
 235                 //saa7110_write(client,0x2E,0x9A);
 236                 return VIDEO_MODE_PAL;
 237         }
 238         //saa7110_write(client,0x06,0x03);
 239         if (status & 0x20) {    /* 60Hz */
 240                 dprintk(1, KERN_INFO "%s: status=0x%02x (NTSC)\n",
 241                         I2C_NAME(client), status);
 242                 saa7110_write(client, 0x0D, 0x86);
 243                 saa7110_write(client, 0x0F, 0x50);
 244                 saa7110_write(client, 0x11, 0x2C);
 245                 //saa7110_write(client,0x2E,0x81);
 246                 return VIDEO_MODE_NTSC;
 247         }
 248
 249         /* 50Hz -> PAL/SECAM */
 250         saa7110_write(client, 0x0D, 0x86);
 251         saa7110_write(client, 0x0F, 0x10);
 252         saa7110_write(client, 0x11, 0x59);
 253         //saa7110_write(client,0x2E,0x9A);
 254
 255         prepare_to_wait(&decoder->wq, &wait, TASK_UNINTERRUPTIBLE);
 256         schedule_timeout(HZ/4);
 257         finish_wait(&decoder->wq, &wait);
 258
 259         status = saa7110_read(client);
 260         if ((status & 0x03) == 0x01) {
 261                 dprintk(1, KERN_INFO "%s: status=0x%02x (SECAM)\n",
 262                         I2C_NAME(client), status);
 263                 saa7110_write(client, 0x0D, 0x87);
 264                 return VIDEO_MODE_SECAM;
 265         }
 266         dprintk(1, KERN_INFO "%s: status=0x%02x (PAL)\n", I2C_NAME(client),
 267                 status);
 268         return VIDEO_MODE_PAL;
 269 }
 270
 271 static int
 272 saa7110_command (struct i2c_client *client,
 273                  unsigned int       cmd,
 274                  void              *arg)
 275 {
 276         struct saa7110 *decoder = i2c_get_clientdata(client);
 277         int v;
 278
 279         switch (cmd) {
 280         case 0:
 281                 //saa7110_write_block(client, initseq, sizeof(initseq));
 282                 break;
 283
 284         case DECODER_GET_CAPABILITIES:
 285         {
 286                 struct video_decoder_capability *dc = arg;
 287
 288                 dc->flags =
 289                     VIDEO_DECODER_PAL | VIDEO_DECODER_NTSC |
 290                     VIDEO_DECODER_SECAM | VIDEO_DECODER_AUTO;
 291                 dc->inputs = SAA7110_MAX_INPUT;
 292                 dc->outputs = SAA7110_MAX_OUTPUT;
 293         }
 294                 break;
 295
 296         case DECODER_GET_STATUS:
 297         {
 298                 int status;
 299                 int res = 0;
 300
 301                 status = saa7110_read(client);
 302                 dprintk(1, KERN_INFO "%s: status=0x%02x norm=%d\n",
 303                         I2C_NAME(client), status, decoder->norm);
 304                 if (!(status & 0x40))
 305                         res |= DECODER_STATUS_GOOD;
 306                 if (status & 0x03)
 307                         res |= DECODER_STATUS_COLOR;
 308
 309                 switch (decoder->norm) {
 310                 case VIDEO_MODE_NTSC:
 311                         res |= DECODER_STATUS_NTSC;
 312                         break;
 313                 case VIDEO_MODE_PAL:
 314                         res |= DECODER_STATUS_PAL;
 315                         break;
 316                 case VIDEO_MODE_SECAM:
 317                         res |= DECODER_STATUS_SECAM;
 318                         break;
 319                 }
 320                 *(int *) arg = res;
 321         }
 322                 break;
 323
 324         case DECODER_SET_NORM:
 325                 v = *(int *) arg;
 326                 if (decoder->norm != v) {
 327                         decoder->norm = v;
 328                         //saa7110_write(client, 0x06, 0x03);
 329                         switch (v) {
 330                         case VIDEO_MODE_NTSC:
 331                                 saa7110_write(client, 0x0D, 0x86);
 332                                 saa7110_write(client, 0x0F, 0x50);
 333                                 saa7110_write(client, 0x11, 0x2C);
 334                                 //saa7110_write(client, 0x2E, 0x81);
 335                                 dprintk(1,
 336                                         KERN_INFO "%s: switched to NTSC\n",
 337                                         I2C_NAME(client));
 338                                 break;
 339                         case VIDEO_MODE_PAL:
 340                                 saa7110_write(client, 0x0D, 0x86);
 341                                 saa7110_write(client, 0x0F, 0x10);
 342                                 saa7110_write(client, 0x11, 0x59);
 343                                 //saa7110_write(client, 0x2E, 0x9A);
 344                                 dprintk(1,
 345                                         KERN_INFO "%s: switched to PAL\n",
 346                                         I2C_NAME(client));
 347                                 break;
 348                         case VIDEO_MODE_SECAM:
 349                                 saa7110_write(client, 0x0D, 0x87);
 350                                 saa7110_write(client, 0x0F, 0x10);
 351                                 saa7110_write(client, 0x11, 0x59);
 352                                 //saa7110_write(client, 0x2E, 0x9A);
 353                                 dprintk(1,
 354                                         KERN_INFO
 355                                         "%s: switched to SECAM\n",
 356                                         I2C_NAME(client));
 357                                 break;
 358                         case VIDEO_MODE_AUTO:
 359                                 dprintk(1,
 360                                         KERN_INFO
 361                                         "%s: TV standard detection...\n",
 362                                         I2C_NAME(client));
 363                                 decoder->norm = determine_norm(client);
 364                                 *(int *) arg = decoder->norm;
 365                                 break;
 366                         default:
 367                                 return -EPERM;
 368                         }
 369                 }
 370                 break;
 371
 372         case DECODER_SET_INPUT:
 373                 v = *(int *) arg;
 374                 if (v < 0 || v > SAA7110_MAX_INPUT) {
 375                         dprintk(1,
 376                                 KERN_INFO "%s: input=%d not available\n",
 377                                 I2C_NAME(client), v);
 378                         return -EINVAL;
 379                 }
 380                 if (decoder->input != v) {
 381                         saa7110_selmux(client, v);
 382                         dprintk(1, KERN_INFO "%s: switched to input=%d\n",
 383                                 I2C_NAME(client), v);
 384                 }
 385                 break;
 386
 387         case DECODER_SET_OUTPUT:
 388                 v = *(int *) arg;
 389                 /* not much choice of outputs */
 390                 if (v != 0)
 391                         return -EINVAL;
 392                 break;
 393
 394         case DECODER_ENABLE_OUTPUT:
 395                 v = *(int *) arg;
 396                 if (decoder->enable != v) {
 397                         decoder->enable = v;
 398                         saa7110_write(client, 0x0E, v ? 0x18 : 0x80);
 399                         dprintk(1, KERN_INFO "%s: YUV %s\n", I2C_NAME(client),
 400                                 v ? "on" : "off");
 401                 }
 402                 break;
 403
 404         case DECODER_SET_PICTURE:
 405         {
 406                 struct video_picture *pic = arg;
 407
 408                 if (decoder->bright != pic->brightness) {
 409                         /* We want 0 to 255 we get 0-65535 */
 410                         decoder->bright = pic->brightness;
 411                         saa7110_write(client, 0x19, decoder->bright >> 8);
 412                 }
 413                 if (decoder->contrast != pic->contrast) {
 414                         /* We want 0 to 127 we get 0-65535 */
 415                         decoder->contrast = pic->contrast;
 416                         saa7110_write(client, 0x13,
 417                                       decoder->contrast >> 9);
 418                 }
 419                 if (decoder->sat != pic->colour) {
 420                         /* We want 0 to 127 we get 0-65535 */
 421                         decoder->sat = pic->colour;
 422                         saa7110_write(client, 0x12, decoder->sat >> 9);
 423                 }
 424                 if (decoder->hue != pic->hue) {
 425                         /* We want -128 to 127 we get 0-65535 */
 426                         decoder->hue = pic->hue;
 427                         saa7110_write(client, 0x07,
 428                                       (decoder->hue >> 8) - 128);
 429                 }
 430         }
 431                 break;
 432
 433         case DECODER_DUMP:
 434                 for (v = 0; v < 0x34; v += 16) {
 435                         int j;
 436                         dprintk(1, KERN_INFO "%s: %03x\n", I2C_NAME(client),
 437                                 v);
 438                         for (j = 0; j < 16; j++) {
 439                                 dprintk(1, KERN_INFO " %02x",
 440                                         decoder->reg[v + j]);
 441                         }
 442                         dprintk(1, KERN_INFO "\n");
 443                 }
 444                 break;
 445
 446         default:
 447                 dprintk(1, KERN_INFO "unknown saa7110_command??(%d)\n",
 448                         cmd);
 449                 return -EINVAL;
 450         }
 451         return 0;
 452 }
 453
 454 /* ----------------------------------------------------------------------- */
 455
 456 /*
 457  * Generic i2c probe
 458  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
 459  */
 460 static unsigned short normal_i2c[] = {
 461         I2C_SAA7110 >> 1,
 462         (I2C_SAA7110 >> 1) + 1,
 463         I2C_CLIENT_END
 464 };
 465
 466 static unsigned short ignore = I2C_CLIENT_END;
 467
 468 static struct i2c_client_address_data addr_data = {
 469         .normal_i2c             = normal_i2c,
 470         .probe                  = &ignore,
 471         .ignore                 = &ignore,
 472 };
 473
 474 static struct i2c_driver i2c_driver_saa7110;
 475
 476 static int
 477 saa7110_detect_client (struct i2c_adapter *adapter,
 478                        int                 address,
 479                        int                 kind)
 480 {
 481         struct i2c_client *client;
 482         struct saa7110 *decoder;
 483         int rv;
 484
 485         dprintk(1,
 486                 KERN_INFO
 487                 "saa7110.c: detecting saa7110 client on address 0x%x\n",
 488                 address << 1);
 489
 490         /* Check if the adapter supports the needed features */
 491         if (!i2c_check_functionality
 492             (adapter,
 493              I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
 494                 return 0;
 495
 496         client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
 497         if (client == 0)
 498                 return -ENOMEM;
 499         client->addr = address;
 500         client->adapter = adapter;
 501         client->driver = &i2c_driver_saa7110;
 502         strlcpy(I2C_NAME(client), "saa7110", sizeof(I2C_NAME(client)));
 503
 504         decoder = kzalloc(sizeof(struct saa7110), GFP_KERNEL);
 505         if (decoder == 0) {
 506                 kfree(client);
 507                 return -ENOMEM;
 508         }
 509         decoder->norm = VIDEO_MODE_PAL;
 510         decoder->input = 0;
 511         decoder->enable = 1;
 512         decoder->bright = 32768;
 513         decoder->contrast = 32768;
 514         decoder->hue = 32768;
 515         decoder->sat = 32768;
 516         init_waitqueue_head(&decoder->wq);
 517         i2c_set_clientdata(client, decoder);
 518
 519         rv = i2c_attach_client(client);
 520         if (rv) {
 521                 kfree(client);
 522                 kfree(decoder);
 523                 return rv;
 524         }
 525
 526         rv = saa7110_write_block(client, initseq, sizeof(initseq));
 527         if (rv < 0)
 528                 dprintk(1, KERN_ERR "%s_attach: init status %d\n",
 529                         I2C_NAME(client), rv);
 530         else {
 531                 int ver, status;
 532                 saa7110_write(client, 0x21, 0x10);
 533                 saa7110_write(client, 0x0e, 0x18);
 534                 saa7110_write(client, 0x0D, 0x04);
 535                 ver = saa7110_read(client);
 536                 saa7110_write(client, 0x0D, 0x06);
 537                 //mdelay(150);
 538                 status = saa7110_read(client);
 539                 dprintk(1,
 540                         KERN_INFO
 541                         "%s_attach: SAA7110A version %x at 0x%02x, status=0x%02x\n",
 542                         I2C_NAME(client), ver, client->addr << 1, status);
 543                 saa7110_write(client, 0x0D, 0x86);
 544                 saa7110_write(client, 0x0F, 0x10);
 545                 saa7110_write(client, 0x11, 0x59);
 546                 //saa7110_write(client, 0x2E, 0x9A);
 547         }
 548
 549         //saa7110_selmux(client,0);
 550         //determine_norm(client);
 551         /* setup and implicit mode 0 select has been performed */
 552
 553         return 0;
 554 }
 555
 556 static int
 557 saa7110_attach_adapter (struct i2c_adapter *adapter)
 558 {
 559         dprintk(1,
 560                 KERN_INFO
 561                 "saa7110.c: starting probe for adapter %s (0x%x)\n",
 562                 I2C_NAME(adapter), adapter->id);
 563         return i2c_probe(adapter, &addr_data, &saa7110_detect_client);
 564 }
 565
 566 static int
 567 saa7110_detach_client (struct i2c_client *client)
 568 {
 569         struct saa7110 *decoder = i2c_get_clientdata(client);
 570         int err;
 571
 572         err = i2c_detach_client(client);
 573         if (err) {
 574                 return err;
 575         }
 576
 577         kfree(decoder);
 578         kfree(client);
 579
 580         return 0;
 581 }
 582
 583 /* ----------------------------------------------------------------------- */
 584
 585 static struct i2c_driver i2c_driver_saa7110 = {
 586         .driver = {
 587                 .name = "saa7110",
 588         },
 589
 590         .id = I2C_DRIVERID_SAA7110,
 591
 592         .attach_adapter = saa7110_attach_adapter,
 593         .detach_client = saa7110_detach_client,
 594         .command = saa7110_command,
 595 };
 596
 597 static int __init
 598 saa7110_init (void)
 599 {
 600         return i2c_add_driver(&i2c_driver_saa7110);
 601 }
 602
 603 static void __exit
 604 saa7110_exit (void)
 605 {
 606         i2c_del_driver(&i2c_driver_saa7110);
 607 }
 608
 609 module_init(saa7110_init);
 610 module_exit(saa7110_exit);