drivers/media/video/saa7191.c

   1 /*
   2  *  saa7191.c - Philips SAA7191 video decoder driver
   3  *
   4  *  Copyright (C) 2003 Ladislav Michl <ladis@linux-mips.org>
   5  *  Copyright (C) 2004,2005 Mikael Nousiainen <tmnousia@cc.hut.fi>
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License version 2 as
   9  *  published by the Free Software Foundation.
  10  */
  11
  12 #include <linux/delay.h>
  13 #include <linux/errno.h>
  14 #include <linux/fs.h>
  15 #include <linux/init.h>
  16 #include <linux/kernel.h>
  17 #include <linux/major.h>
  18 #include <linux/module.h>
  19 #include <linux/mm.h>
  20 #include <linux/sched.h>
  21 #include <linux/slab.h>
  22
  23 #include <linux/videodev.h>
  24 #include <linux/video_decoder.h>
  25 #include <linux/i2c.h>
  26
  27 #include "saa7191.h"
  28
  29 #define SAA7191_MODULE_VERSION  "0.0.5"
  30
  31 MODULE_DESCRIPTION("Philips SAA7191 video decoder driver");
  32 MODULE_VERSION(SAA7191_MODULE_VERSION);
  33 MODULE_AUTHOR("Mikael Nousiainen <tmnousia@cc.hut.fi>");
  34 MODULE_LICENSE("GPL");
  35
  36 // #define SAA7191_DEBUG
  37
  38 #ifdef SAA7191_DEBUG
  39 #define dprintk(x...) printk("SAA7191: " x);
  40 #else
  41 #define dprintk(x...)
  42 #endif
  43
  44 #define SAA7191_SYNC_COUNT      30
  45 #define SAA7191_SYNC_DELAY      100     /* milliseconds */
  46
  47 struct saa7191 {
  48         struct i2c_client *client;
  49
  50         /* the register values are stored here as the actual
  51          * I2C-registers are write-only */
  52         u8 reg[25];
  53
  54         int input;
  55         int norm;
  56 };
  57
  58 static struct i2c_driver i2c_driver_saa7191;
  59
  60 static const u8 initseq[] = {
  61         0,      /* Subaddress */
  62
  63         0x50,   /* (0x50) SAA7191_REG_IDEL */
  64
  65         /* 50 Hz signal timing */
  66         0x30,   /* (0x30) SAA7191_REG_HSYB */
  67         0x00,   /* (0x00) SAA7191_REG_HSYS */
  68         0xe8,   /* (0xe8) SAA7191_REG_HCLB */
  69         0xb6,   /* (0xb6) SAA7191_REG_HCLS */
  70         0xf4,   /* (0xf4) SAA7191_REG_HPHI */
  71
  72         /* control */
  73         SAA7191_LUMA_APER_1,    /* (0x01) SAA7191_REG_LUMA - CVBS mode */
  74         0x00,   /* (0x00) SAA7191_REG_HUEC */
  75         0xf8,   /* (0xf8) SAA7191_REG_CKTQ */
  76         0xf8,   /* (0xf8) SAA7191_REG_CKTS */
  77         0x90,   /* (0x90) SAA7191_REG_PLSE */
  78         0x90,   /* (0x90) SAA7191_REG_SESE */
  79         0x00,   /* (0x00) SAA7191_REG_GAIN */
  80         SAA7191_STDC_NFEN | SAA7191_STDC_HRMV,  /* (0x0c) SAA7191_REG_STDC
  81                                                  * - not SECAM,
  82                                                  * slow time constant */
  83         SAA7191_IOCK_OEDC | SAA7191_IOCK_OEHS | SAA7191_IOCK_OEVS
  84         | SAA7191_IOCK_OEDY,    /* (0x78) SAA7191_REG_IOCK
  85                                  * - chroma from CVBS, GPSW1 & 2 off */
  86         SAA7191_CTL3_AUFD | SAA7191_CTL3_SCEN | SAA7191_CTL3_OFTS
  87         | SAA7191_CTL3_YDEL0,   /* (0x99) SAA7191_REG_CTL3
  88                                  * - automatic field detection */
  89         0x00,   /* (0x00) SAA7191_REG_CTL4 */
  90         0x2c,   /* (0x2c) SAA7191_REG_CHCV - PAL nominal value */
  91         0x00,   /* unused */
  92         0x00,   /* unused */
  93
  94         /* 60 Hz signal timing */
  95         0x34,   /* (0x34) SAA7191_REG_HS6B */
  96         0x0a,   /* (0x0a) SAA7191_REG_HS6S */
  97         0xf4,   /* (0xf4) SAA7191_REG_HC6B */
  98         0xce,   /* (0xce) SAA7191_REG_HC6S */
  99         0xf4,   /* (0xf4) SAA7191_REG_HP6I */
 100 };
 101
 102 /* SAA7191 register handling */
 103
 104 static u8 saa7191_read_reg(struct i2c_client *client,
 105                            u8 reg)
 106 {
 107         return ((struct saa7191 *)i2c_get_clientdata(client))->reg[reg];
 108 }
 109
 110 static int saa7191_read_status(struct i2c_client *client,
 111                                u8 *value)
 112 {
 113         int ret;
 114
 115         ret = i2c_master_recv(client, value, 1);
 116         if (ret < 0) {
 117                 printk(KERN_ERR "SAA7191: saa7191_read_status(): read failed\n");
 118                 return ret;
 119         }
 120
 121         return 0;
 122 }
 123
 124
 125 static int saa7191_write_reg(struct i2c_client *client, u8 reg,
 126                              u8 value)
 127 {
 128         ((struct saa7191 *)i2c_get_clientdata(client))->reg[reg] = value;
 129         return i2c_smbus_write_byte_data(client, reg, value);
 130 }
 131
 132 /* the first byte of data must be the first subaddress number (register) */
 133 static int saa7191_write_block(struct i2c_client *client,
 134                                u8 length, u8 *data)
 135 {
 136         int i;
 137         int ret;
 138
 139         struct saa7191 *decoder = (struct saa7191 *)i2c_get_clientdata(client);
 140         for (i = 0; i < (length - 1); i++) {
 141                 decoder->reg[data[0] + i] = data[i + 1];
 142         }
 143
 144         ret = i2c_master_send(client, data, length);
 145         if (ret < 0) {
 146                 printk(KERN_ERR "SAA7191: saa7191_write_block(): "
 147                        "write failed\n");
 148                 return ret;
 149         }
 150
 151         return 0;
 152 }
 153
 154 /* Helper functions */
 155
 156 static int saa7191_set_input(struct i2c_client *client, int input)
 157 {
 158         struct saa7191 *decoder = i2c_get_clientdata(client);
 159         u8 luma = saa7191_read_reg(client, SAA7191_REG_LUMA);
 160         u8 iock = saa7191_read_reg(client, SAA7191_REG_IOCK);
 161         int err;
 162
 163         switch (input) {
 164         case SAA7191_INPUT_COMPOSITE: /* Set Composite input */
 165                 iock &= ~(SAA7191_IOCK_CHRS | SAA7191_IOCK_GPSW1
 166                           | SAA7191_IOCK_GPSW2);
 167                 /* Chrominance trap active */
 168                 luma &= ~SAA7191_LUMA_BYPS;
 169                 break;
 170         case SAA7191_INPUT_SVIDEO: /* Set S-Video input */
 171                 iock |= SAA7191_IOCK_CHRS | SAA7191_IOCK_GPSW2;
 172                 /* Chrominance trap bypassed */
 173                 luma |= SAA7191_LUMA_BYPS;
 174                 break;
 175         default:
 176                 return -EINVAL;
 177         }
 178
 179         err = saa7191_write_reg(client, SAA7191_REG_LUMA, luma);
 180         if (err)
 181                 return -EIO;
 182         err = saa7191_write_reg(client, SAA7191_REG_IOCK, iock);
 183         if (err)
 184                 return -EIO;
 185
 186         decoder->input = input;
 187
 188         return 0;
 189 }
 190
 191 static int saa7191_set_norm(struct i2c_client *client, int norm)
 192 {
 193         struct saa7191 *decoder = i2c_get_clientdata(client);
 194         u8 stdc = saa7191_read_reg(client, SAA7191_REG_STDC);
 195         u8 ctl3 = saa7191_read_reg(client, SAA7191_REG_CTL3);
 196         u8 chcv = saa7191_read_reg(client, SAA7191_REG_CHCV);
 197         int err;
 198
 199         switch(norm) {
 200         case SAA7191_NORM_PAL:
 201                 stdc &= ~SAA7191_STDC_SECS;
 202                 ctl3 &= ~(SAA7191_CTL3_AUFD | SAA7191_CTL3_FSEL);
 203                 chcv = SAA7191_CHCV_PAL;
 204                 break;
 205         case SAA7191_NORM_NTSC:
 206                 stdc &= ~SAA7191_STDC_SECS;
 207                 ctl3 &= ~SAA7191_CTL3_AUFD;
 208                 ctl3 |= SAA7191_CTL3_FSEL;
 209                 chcv = SAA7191_CHCV_NTSC;
 210                 break;
 211         case SAA7191_NORM_SECAM:
 212                 stdc |= SAA7191_STDC_SECS;
 213                 ctl3 &= ~(SAA7191_CTL3_AUFD | SAA7191_CTL3_FSEL);
 214                 chcv = SAA7191_CHCV_PAL;
 215                 break;
 216         default:
 217                 return -EINVAL;
 218         }
 219
 220         err = saa7191_write_reg(client, SAA7191_REG_CTL3, ctl3);
 221         if (err)
 222                 return -EIO;
 223         err = saa7191_write_reg(client, SAA7191_REG_STDC, stdc);
 224         if (err)
 225                 return -EIO;
 226         err = saa7191_write_reg(client, SAA7191_REG_CHCV, chcv);
 227         if (err)
 228                 return -EIO;
 229
 230         decoder->norm = norm;
 231
 232         dprintk("ctl3: %02x stdc: %02x chcv: %02x\n", ctl3,
 233                 stdc, chcv);
 234         dprintk("norm: %d\n", norm);
 235
 236         return 0;
 237 }
 238
 239 static int saa7191_wait_for_signal(struct i2c_client *client, u8 *status)
 240 {
 241         int i = 0;
 242
 243         dprintk("Checking for signal...\n");
 244
 245         for (i = 0; i < SAA7191_SYNC_COUNT; i++) {
 246                 if (saa7191_read_status(client, status))
 247                         return -EIO;
 248
 249                 if (((*status) & SAA7191_STATUS_HLCK) == 0) {
 250                         dprintk("Signal found\n");
 251                         return 0;
 252                 }
 253
 254                 msleep(SAA7191_SYNC_DELAY);
 255         }
 256
 257         dprintk("No signal\n");
 258
 259         return -EBUSY;
 260 }
 261
 262 static int saa7191_autodetect_norm_extended(struct i2c_client *client)
 263 {
 264         u8 stdc = saa7191_read_reg(client, SAA7191_REG_STDC);
 265         u8 ctl3 = saa7191_read_reg(client, SAA7191_REG_CTL3);
 266         u8 status;
 267         int err = 0;
 268
 269         dprintk("SAA7191 extended signal auto-detection...\n");
 270
 271         stdc &= ~SAA7191_STDC_SECS;
 272         ctl3 &= ~(SAA7191_CTL3_FSEL);
 273
 274         err = saa7191_write_reg(client, SAA7191_REG_STDC, stdc);
 275         if (err) {
 276                 err = -EIO;
 277                 goto out;
 278         }
 279         err = saa7191_write_reg(client, SAA7191_REG_CTL3, ctl3);
 280         if (err) {
 281                 err = -EIO;
 282                 goto out;
 283         }
 284
 285         ctl3 |= SAA7191_CTL3_AUFD;
 286         err = saa7191_write_reg(client, SAA7191_REG_CTL3, ctl3);
 287         if (err) {
 288                 err = -EIO;
 289                 goto out;
 290         }
 291
 292         msleep(SAA7191_SYNC_DELAY);
 293
 294         err = saa7191_wait_for_signal(client, &status);
 295         if (err)
 296                 goto out;
 297
 298         if (status & SAA7191_STATUS_FIDT) {
 299                 /* 60Hz signal -> NTSC */
 300                 dprintk("60Hz signal: NTSC\n");
 301                 return saa7191_set_norm(client, SAA7191_NORM_NTSC);
 302         }
 303
 304         /* 50Hz signal */
 305         dprintk("50Hz signal: Trying PAL...\n");
 306
 307         /* try PAL first */
 308         err = saa7191_set_norm(client, SAA7191_NORM_PAL);
 309         if (err)
 310                 goto out;
 311
 312         msleep(SAA7191_SYNC_DELAY);
 313
 314         err = saa7191_wait_for_signal(client, &status);
 315         if (err)
 316                 goto out;
 317
 318         /* not 50Hz ? */
 319         if (status & SAA7191_STATUS_FIDT) {
 320                 dprintk("No 50Hz signal\n");
 321                 err = -EAGAIN;
 322                 goto out;
 323         }
 324
 325         if (status & SAA7191_STATUS_CODE) {
 326                 dprintk("PAL\n");
 327                 return 0;
 328         }
 329
 330         dprintk("No color detected with PAL - Trying SECAM...\n");
 331
 332         /* no color detected ? -> try SECAM */
 333         err = saa7191_set_norm(client,
 334                                SAA7191_NORM_SECAM);
 335         if (err)
 336                 goto out;
 337
 338         msleep(SAA7191_SYNC_DELAY);
 339
 340         err = saa7191_wait_for_signal(client, &status);
 341         if (err)
 342                 goto out;
 343
 344         /* not 50Hz ? */
 345         if (status & SAA7191_STATUS_FIDT) {
 346                 dprintk("No 50Hz signal\n");
 347                 err = -EAGAIN;
 348                 goto out;
 349         }
 350
 351         if (status & SAA7191_STATUS_CODE) {
 352                 /* Color detected -> SECAM */
 353                 dprintk("SECAM\n");
 354                 return 0;
 355         }
 356
 357         dprintk("No color detected with SECAM - Going back to PAL.\n");
 358
 359         /* still no color detected ?
 360          * -> set norm back to PAL */
 361         err = saa7191_set_norm(client,
 362                                SAA7191_NORM_PAL);
 363         if (err)
 364                 goto out;
 365
 366 out:
 367         ctl3 = saa7191_read_reg(client, SAA7191_REG_CTL3);
 368         if (ctl3 & SAA7191_CTL3_AUFD) {
 369                 ctl3 &= ~(SAA7191_CTL3_AUFD);
 370                 err = saa7191_write_reg(client, SAA7191_REG_CTL3, ctl3);
 371                 if (err) {
 372                         err = -EIO;
 373                 }
 374         }
 375
 376         return err;
 377 }
 378
 379 static int saa7191_autodetect_norm(struct i2c_client *client)
 380 {
 381         u8 status;
 382
 383         dprintk("SAA7191 signal auto-detection...\n");
 384
 385         dprintk("Reading status...\n");
 386
 387         if (saa7191_read_status(client, &status))
 388                 return -EIO;
 389
 390         dprintk("Checking for signal...\n");
 391
 392         /* no signal ? */
 393         if (status & SAA7191_STATUS_HLCK) {
 394                 dprintk("No signal\n");
 395                 return -EBUSY;
 396         }
 397
 398         dprintk("Signal found\n");
 399
 400         if (status & SAA7191_STATUS_FIDT) {
 401                 /* 60hz signal -> NTSC */
 402                 dprintk("NTSC\n");
 403                 return saa7191_set_norm(client, SAA7191_NORM_NTSC);
 404         } else {
 405                 /* 50hz signal -> PAL */
 406                 dprintk("PAL\n");
 407                 return saa7191_set_norm(client, SAA7191_NORM_PAL);
 408         }
 409 }
 410
 411 static int saa7191_get_control(struct i2c_client *client,
 412                                struct saa7191_control *ctrl)
 413 {
 414         u8 reg;
 415         int ret = 0;
 416
 417         switch (ctrl->type) {
 418         case SAA7191_CONTROL_BANDPASS:
 419         case SAA7191_CONTROL_BANDPASS_WEIGHT:
 420         case SAA7191_CONTROL_CORING:
 421                 reg = saa7191_read_reg(client, SAA7191_REG_LUMA);
 422                 switch (ctrl->type) {
 423                 case SAA7191_CONTROL_BANDPASS:
 424                         ctrl->value = ((s32)reg & SAA7191_LUMA_BPSS_MASK)
 425                                 >> SAA7191_LUMA_BPSS_SHIFT;
 426                         break;
 427                 case SAA7191_CONTROL_BANDPASS_WEIGHT:
 428                         ctrl->value = ((s32)reg & SAA7191_LUMA_APER_MASK)
 429                                 >> SAA7191_LUMA_APER_SHIFT;
 430                         break;
 431                 case SAA7191_CONTROL_CORING:
 432                         ctrl->value = ((s32)reg & SAA7191_LUMA_CORI_MASK)
 433                                 >> SAA7191_LUMA_CORI_SHIFT;
 434                         break;
 435                 }
 436                 break;
 437         case SAA7191_CONTROL_FORCE_COLOUR:
 438         case SAA7191_CONTROL_CHROMA_GAIN:
 439                 reg = saa7191_read_reg(client, SAA7191_REG_GAIN);
 440                 if (ctrl->type == SAA7191_CONTROL_FORCE_COLOUR)
 441                         ctrl->value = ((s32)reg & SAA7191_GAIN_COLO) ? 1 : 0;
 442                 else
 443                         ctrl->value = ((s32)reg & SAA7191_GAIN_LFIS_MASK)
 444                                 >> SAA7191_GAIN_LFIS_SHIFT;
 445                 break;
 446         case SAA7191_CONTROL_HUE:
 447                 reg = saa7191_read_reg(client, SAA7191_REG_HUEC);
 448                 if (reg < 0x80)
 449                         reg += 0x80;
 450                 else
 451                         reg -= 0x80;
 452                 ctrl->value = (s32)reg;
 453                 break;
 454         case SAA7191_CONTROL_VTRC:
 455                 reg = saa7191_read_reg(client, SAA7191_REG_STDC);
 456                 ctrl->value = ((s32)reg & SAA7191_STDC_VTRC) ? 1 : 0;
 457                 break;
 458         case SAA7191_CONTROL_LUMA_DELAY:
 459                 reg = saa7191_read_reg(client, SAA7191_REG_CTL3);
 460                 ctrl->value = ((s32)reg & SAA7191_CTL3_YDEL_MASK)
 461                         >> SAA7191_CTL3_YDEL_SHIFT;
 462                 if (ctrl->value >= 4)
 463                         ctrl->value -= 8;
 464                 break;
 465         case SAA7191_CONTROL_VNR:
 466                 reg = saa7191_read_reg(client, SAA7191_REG_CTL4);
 467                 ctrl->value = ((s32)reg & SAA7191_CTL4_VNOI_MASK)
 468                         >> SAA7191_CTL4_VNOI_SHIFT;
 469                 break;
 470         default:
 471                 ret = -EINVAL;
 472         }
 473
 474         return ret;
 475 }
 476
 477 static int saa7191_set_control(struct i2c_client *client,
 478                                struct saa7191_control *ctrl)
 479 {
 480         u8 reg;
 481         int ret = 0;
 482
 483         switch (ctrl->type) {
 484         case SAA7191_CONTROL_BANDPASS:
 485         case SAA7191_CONTROL_BANDPASS_WEIGHT:
 486         case SAA7191_CONTROL_CORING:
 487                 reg = saa7191_read_reg(client, SAA7191_REG_LUMA);
 488                 switch (ctrl->type) {
 489                 case SAA7191_CONTROL_BANDPASS:
 490                         reg &= ~SAA7191_LUMA_BPSS_MASK;
 491                         reg |= (ctrl->value << SAA7191_LUMA_BPSS_SHIFT)
 492                                 & SAA7191_LUMA_BPSS_MASK;
 493                         break;
 494                 case SAA7191_CONTROL_BANDPASS_WEIGHT:
 495                         reg &= ~SAA7191_LUMA_APER_MASK;
 496                         reg |= (ctrl->value << SAA7191_LUMA_APER_SHIFT)
 497                                 & SAA7191_LUMA_APER_MASK;
 498                         break;
 499                 case SAA7191_CONTROL_CORING:
 500                         reg &= ~SAA7191_LUMA_CORI_MASK;
 501                         reg |= (ctrl->value << SAA7191_LUMA_CORI_SHIFT)
 502                                 & SAA7191_LUMA_CORI_MASK;
 503                         break;
 504                 }
 505                 ret = saa7191_write_reg(client, SAA7191_REG_LUMA, reg);
 506                 break;
 507         case SAA7191_CONTROL_FORCE_COLOUR:
 508         case SAA7191_CONTROL_CHROMA_GAIN:
 509                 reg = saa7191_read_reg(client, SAA7191_REG_GAIN);
 510                 if (ctrl->type == SAA7191_CONTROL_FORCE_COLOUR) {
 511                         if (ctrl->value)
 512                                 reg |= SAA7191_GAIN_COLO;
 513                         else
 514                                 reg &= ~SAA7191_GAIN_COLO;
 515                 } else {
 516                         reg &= ~SAA7191_GAIN_LFIS_MASK;
 517                         reg |= (ctrl->value << SAA7191_GAIN_LFIS_SHIFT)
 518                                 & SAA7191_GAIN_LFIS_MASK;
 519                 }
 520                 ret = saa7191_write_reg(client, SAA7191_REG_GAIN, reg);
 521                 break;
 522         case SAA7191_CONTROL_HUE:
 523                 reg = ctrl->value & 0xff;
 524                 if (reg < 0x80)
 525                         reg += 0x80;
 526                 else
 527                         reg -= 0x80;
 528                 ret = saa7191_write_reg(client, SAA7191_REG_HUEC, reg);
 529                 break;
 530         case SAA7191_CONTROL_VTRC:
 531                 reg = saa7191_read_reg(client, SAA7191_REG_STDC);
 532                 if (ctrl->value)
 533                         reg |= SAA7191_STDC_VTRC;
 534                 else
 535                         reg &= ~SAA7191_STDC_VTRC;
 536                 ret = saa7191_write_reg(client, SAA7191_REG_STDC, reg);
 537                 break;
 538         case SAA7191_CONTROL_LUMA_DELAY: {
 539                 s32 value = ctrl->value;
 540                 if (value < 0)
 541                         value += 8;
 542                 reg = saa7191_read_reg(client, SAA7191_REG_CTL3);
 543                 reg &= ~SAA7191_CTL3_YDEL_MASK;
 544                 reg |= (value << SAA7191_CTL3_YDEL_SHIFT)
 545                         & SAA7191_CTL3_YDEL_MASK;
 546                 ret = saa7191_write_reg(client, SAA7191_REG_CTL3, reg);
 547                 break;
 548         }
 549         case SAA7191_CONTROL_VNR:
 550                 reg = saa7191_read_reg(client, SAA7191_REG_CTL4);
 551                 reg &= ~SAA7191_CTL4_VNOI_MASK;
 552                 reg |= (ctrl->value << SAA7191_CTL4_VNOI_SHIFT)
 553                         & SAA7191_CTL4_VNOI_MASK;
 554                 ret = saa7191_write_reg(client, SAA7191_REG_CTL4, reg);
 555                 break;
 556         default:
 557                 ret = -EINVAL;
 558         }
 559
 560         return ret;
 561 }
 562
 563 /* I2C-interface */
 564
 565 static int saa7191_attach(struct i2c_adapter *adap, int addr, int kind)
 566 {
 567         int err = 0;
 568         struct saa7191 *decoder;
 569         struct i2c_client *client;
 570
 571         printk(KERN_INFO "Philips SAA7191 driver version %s\n",
 572                SAA7191_MODULE_VERSION);
 573
 574         client = kmalloc(sizeof(*client), GFP_KERNEL);
 575         if (!client)
 576                 return -ENOMEM;
 577         decoder = kmalloc(sizeof(*decoder), GFP_KERNEL);
 578         if (!decoder) {
 579                 err = -ENOMEM;
 580                 goto out_free_client;
 581         }
 582
 583         memset(client, 0, sizeof(struct i2c_client));
 584         memset(decoder, 0, sizeof(struct saa7191));
 585
 586         client->addr = addr;
 587         client->adapter = adap;
 588         client->driver = &i2c_driver_saa7191;
 589         client->flags = 0;
 590         strcpy(client->name, "saa7191 client");
 591         i2c_set_clientdata(client, decoder);
 592
 593         decoder->client = client;
 594
 595         err = i2c_attach_client(client);
 596         if (err)
 597                 goto out_free_decoder;
 598
 599         err = saa7191_write_block(client, sizeof(initseq), (u8 *)initseq);
 600         if (err) {
 601                 printk(KERN_ERR "SAA7191 initialization failed\n");
 602                 goto out_detach_client;
 603         }
 604
 605         printk(KERN_INFO "SAA7191 initialized\n");
 606
 607         decoder->input = SAA7191_INPUT_COMPOSITE;
 608         decoder->norm = SAA7191_NORM_PAL;
 609
 610         err = saa7191_autodetect_norm(client);
 611         if (err && (err != -EBUSY)) {
 612                 printk(KERN_ERR "SAA7191: Signal auto-detection failed\n");
 613         }
 614
 615         return 0;
 616
 617 out_detach_client:
 618         i2c_detach_client(client);
 619 out_free_decoder:
 620         kfree(decoder);
 621 out_free_client:
 622         kfree(client);
 623         return err;
 624 }
 625
 626 static int saa7191_probe(struct i2c_adapter *adap)
 627 {
 628         /* Always connected to VINO */
 629         if (adap->id == I2C_HW_SGI_VINO)
 630                 return saa7191_attach(adap, SAA7191_ADDR, 0);
 631         /* Feel free to add probe here :-) */
 632         return -ENODEV;
 633 }
 634
 635 static int saa7191_detach(struct i2c_client *client)
 636 {
 637         struct saa7191 *decoder = i2c_get_clientdata(client);
 638
 639         i2c_detach_client(client);
 640         kfree(decoder);
 641         kfree(client);
 642         return 0;
 643 }
 644
 645 static int saa7191_command(struct i2c_client *client, unsigned int cmd,
 646                            void *arg)
 647 {
 648         struct saa7191 *decoder = i2c_get_clientdata(client);
 649
 650         switch (cmd) {
 651         case DECODER_GET_CAPABILITIES: {
 652                 struct video_decoder_capability *cap = arg;
 653
 654                 cap->flags  = VIDEO_DECODER_PAL | VIDEO_DECODER_NTSC |
 655                               VIDEO_DECODER_SECAM | VIDEO_DECODER_AUTO;
 656                 cap->inputs = (client->adapter->id == I2C_HW_SGI_VINO) ? 2 : 1;
 657                 cap->outputs = 1;
 658                 break;
 659         }
 660         case DECODER_GET_STATUS: {
 661                 int *iarg = arg;
 662                 u8 status;
 663                 int res = 0;
 664
 665                 if (saa7191_read_status(client, &status)) {
 666                         return -EIO;
 667                 }
 668                 if ((status & SAA7191_STATUS_HLCK) == 0)
 669                         res |= DECODER_STATUS_GOOD;
 670                 if (status & SAA7191_STATUS_CODE)
 671                         res |= DECODER_STATUS_COLOR;
 672                 switch (decoder->norm) {
 673                 case SAA7191_NORM_NTSC:
 674                         res |= DECODER_STATUS_NTSC;
 675                         break;
 676                 case SAA7191_NORM_PAL:
 677                         res |= DECODER_STATUS_PAL;
 678                         break;
 679                 case SAA7191_NORM_SECAM:
 680                         res |= DECODER_STATUS_SECAM;
 681                         break;
 682                 case SAA7191_NORM_AUTO:
 683                 default:
 684                         if (status & SAA7191_STATUS_FIDT)
 685                                 res |= DECODER_STATUS_NTSC;
 686                         else
 687                                 res |= DECODER_STATUS_PAL;
 688                         break;
 689                 }
 690                 *iarg = res;
 691                 break;
 692         }
 693         case DECODER_SET_NORM: {
 694                 int *iarg = arg;
 695
 696                 switch (*iarg) {
 697                 case VIDEO_MODE_AUTO:
 698                         return saa7191_autodetect_norm(client);
 699                 case VIDEO_MODE_PAL:
 700                         return saa7191_set_norm(client, SAA7191_NORM_PAL);
 701                 case VIDEO_MODE_NTSC:
 702                         return saa7191_set_norm(client, SAA7191_NORM_NTSC);
 703                 case VIDEO_MODE_SECAM:
 704                         return saa7191_set_norm(client, SAA7191_NORM_SECAM);
 705                 default:
 706                         return -EINVAL;
 707                 }
 708                 break;
 709         }
 710         case DECODER_SET_INPUT: {
 711                 int *iarg = arg;
 712
 713                 switch (client->adapter->id) {
 714                 case I2C_HW_SGI_VINO:
 715                         return saa7191_set_input(client, *iarg);
 716                 default:
 717                         if (*iarg != 0)
 718                                 return -EINVAL;
 719                 }
 720                 break;
 721         }
 722         case DECODER_SET_OUTPUT: {
 723                 int *iarg = arg;
 724
 725                 /* not much choice of outputs */
 726                 if (*iarg != 0)
 727                         return -EINVAL;
 728                 break;
 729         }
 730         case DECODER_ENABLE_OUTPUT: {
 731                 /* Always enabled */
 732                 break;
 733         }
 734         case DECODER_SET_PICTURE: {
 735                 struct video_picture *pic = arg;
 736                 unsigned val;
 737                 int err;
 738
 739                 val = (pic->hue >> 8) - 0x80;
 740
 741                 err = saa7191_write_reg(client, SAA7191_REG_HUEC, val);
 742                 if (err)
 743                         return -EIO;
 744
 745                 break;
 746         }
 747         case DECODER_SAA7191_GET_STATUS: {
 748                 struct saa7191_status *status = arg;
 749                 u8 status_reg;
 750
 751                 if (saa7191_read_status(client, &status_reg))
 752                         return -EIO;
 753
 754                 status->signal = ((status_reg & SAA7191_STATUS_HLCK) == 0)
 755                         ? 1 : 0;
 756                 status->signal_60hz = (status_reg & SAA7191_STATUS_FIDT)
 757                         ? 1 : 0;
 758                 status->color = (status_reg & SAA7191_STATUS_CODE) ? 1 : 0;
 759
 760                 status->input = decoder->input;
 761                 status->norm = decoder->norm;
 762
 763                 break;
 764         }
 765         case DECODER_SAA7191_SET_NORM: {
 766                 int *norm = arg;
 767
 768                 switch (*norm) {
 769                 case SAA7191_NORM_AUTO:
 770                         return saa7191_autodetect_norm(client);
 771                 case SAA7191_NORM_AUTO_EXT:
 772                         return saa7191_autodetect_norm_extended(client);
 773                 default:
 774                         return saa7191_set_norm(client, *norm);
 775                 }
 776         }
 777         case DECODER_SAA7191_GET_CONTROL: {
 778                 return saa7191_get_control(client, arg);
 779         }
 780         case DECODER_SAA7191_SET_CONTROL: {
 781                 return saa7191_set_control(client, arg);
 782         }
 783         default:
 784                 return -EINVAL;
 785         }
 786
 787         return 0;
 788 }
 789
 790 static struct i2c_driver i2c_driver_saa7191 = {
 791         .driver = {
 792                 .name   = "saa7191",
 793         },
 794         .id             = I2C_DRIVERID_SAA7191,
 795         .attach_adapter = saa7191_probe,
 796         .detach_client  = saa7191_detach,
 797         .command        = saa7191_command
 798 };
 799
 800 static int saa7191_init(void)
 801 {
 802         return i2c_add_driver(&i2c_driver_saa7191);
 803 }
 804
 805 static void saa7191_exit(void)
 806 {
 807         i2c_del_driver(&i2c_driver_saa7191);
 808 }
 809
 810 module_init(saa7191_init);
 811 module_exit(saa7191_exit);