drivers/media/video/tuner-xc2028.c

   1 /* tuner-xc2028
   2  *
   3  * Copyright (c) 2007-2008 Mauro Carvalho Chehab (mchehab@infradead.org)
   4  *
   5  * Copyright (c) 2007 Michel Ludwig (michel.ludwig@gmail.com)
   6  *       - frontend interface
   7  *
   8  * This code is placed under the terms of the GNU General Public License v2
   9  */
  10
  11 #include <linux/i2c.h>
  12 #include <asm/div64.h>
  13 #include <linux/firmware.h>
  14 #include <linux/videodev2.h>
  15 #include <linux/delay.h>
  16 #include <media/tuner.h>
  17 #include <linux/mutex.h>
  18 #include "tuner-i2c.h"
  19 #include "tuner-xc2028.h"
  20 #include "tuner-xc2028-types.h"
  21
  22 #include <linux/dvb/frontend.h>
  23 #include "dvb_frontend.h"
  24
  25
  26 static int debug;
  27 module_param(debug, int, 0644);
  28 MODULE_PARM_DESC(debug, "enable verbose debug messages");
  29
  30 static char audio_std[8];
  31 module_param_string(audio_std, audio_std, sizeof(audio_std), 0);
  32 MODULE_PARM_DESC(audio_std,
  33         "Audio standard. XC3028 audio decoder explicitly "
  34         "needs to know what audio\n"
  35         "standard is needed for some video standards with audio A2 or NICAM.\n"
  36         "The valid values are:\n"
  37         "A2\n"
  38         "A2/A\n"
  39         "A2/B\n"
  40         "NICAM\n"
  41         "NICAM/A\n"
  42         "NICAM/B\n");
  43
  44 static char firmware_name[FIRMWARE_NAME_MAX];
  45 module_param_string(firmware_name, firmware_name, sizeof(firmware_name), 0);
  46 MODULE_PARM_DESC(firmware_name, "Firmware file name. Allows overriding the "
  47                                 "default firmware name\n");
  48
  49 static LIST_HEAD(xc2028_list);
  50 static DEFINE_MUTEX(xc2028_list_mutex);
  51
  52 /* struct for storing firmware table */
  53 struct firmware_description {
  54         unsigned int  type;
  55         v4l2_std_id   id;
  56         __u16         int_freq;
  57         unsigned char *ptr;
  58         unsigned int  size;
  59 };
  60
  61 struct firmware_properties {
  62         unsigned int    type;
  63         v4l2_std_id     id;
  64         v4l2_std_id     std_req;
  65         __u16           int_freq;
  66         unsigned int    scode_table;
  67         int             scode_nr;
  68 };
  69
  70 struct xc2028_data {
  71         struct list_head        xc2028_list;
  72         struct tuner_i2c_props  i2c_props;
  73         int                     (*tuner_callback) (void *dev,
  74                                                    int command, int arg);
  75         void                    *video_dev;
  76         int                     count;
  77         __u32                   frequency;
  78
  79         struct firmware_description *firm;
  80         int                     firm_size;
  81         __u16                   firm_version;
  82
  83         __u16                   hwmodel;
  84         __u16                   hwvers;
  85
  86         struct xc2028_ctrl      ctrl;
  87
  88         struct firmware_properties cur_fw;
  89
  90         struct mutex lock;
  91 };
  92
  93 #define i2c_send(priv, buf, size) ({                                    \
  94         int _rc;                                                        \
  95         _rc = tuner_i2c_xfer_send(&priv->i2c_props, buf, size);         \
  96         if (size != _rc)                                                \
  97                 tuner_info("i2c output error: rc = %d (should be %d)\n",\
  98                            _rc, (int)size);                             \
  99         _rc;                                                            \
 100 })
 101
 102 #define i2c_rcv(priv, buf, size) ({                                     \
 103         int _rc;                                                        \
 104         _rc = tuner_i2c_xfer_recv(&priv->i2c_props, buf, size);         \
 105         if (size != _rc)                                                \
 106                 tuner_err("i2c input error: rc = %d (should be %d)\n",  \
 107                            _rc, (int)size);                             \
 108         _rc;                                                            \
 109 })
 110
 111 #define i2c_send_recv(priv, obuf, osize, ibuf, isize) ({                \
 112         int _rc;                                                        \
 113         _rc = tuner_i2c_xfer_send_recv(&priv->i2c_props, obuf, osize,   \
 114                                        ibuf, isize);                    \
 115         if (isize != _rc)                                               \
 116                 tuner_err("i2c input error: rc = %d (should be %d)\n",  \
 117                            _rc, (int)isize);                            \
 118         _rc;                                                            \
 119 })
 120
 121 #define send_seq(priv, data...) ({                                      \
 122         static u8 _val[] = data;                                        \
 123         int _rc;                                                        \
 124         if (sizeof(_val) !=                                             \
 125                         (_rc = tuner_i2c_xfer_send(&priv->i2c_props,    \
 126                                                 _val, sizeof(_val)))) { \
 127                 tuner_err("Error on line %d: %d\n", __LINE__, _rc);     \
 128         } else                                                          \
 129                 msleep(10);                                             \
 130         _rc;                                                            \
 131 })
 132
 133 static int xc2028_get_reg(struct xc2028_data *priv, u16 reg, u16 *val)
 134 {
 135         unsigned char buf[2];
 136         unsigned char ibuf[2];
 137
 138         tuner_dbg("%s %04x called\n", __func__, reg);
 139
 140         buf[0] = reg >> 8;
 141         buf[1] = (unsigned char) reg;
 142
 143         if (i2c_send_recv(priv, buf, 2, ibuf, 2) != 2)
 144                 return -EIO;
 145
 146         *val = (ibuf[1]) | (ibuf[0] << 8);
 147         return 0;
 148 }
 149
 150 #define dump_firm_type(t)       dump_firm_type_and_int_freq(t, 0)
 151 static void dump_firm_type_and_int_freq(unsigned int type, u16 int_freq)
 152 {
 153          if (type & BASE)
 154                 printk("BASE ");
 155          if (type & INIT1)
 156                 printk("INIT1 ");
 157          if (type & F8MHZ)
 158                 printk("F8MHZ ");
 159          if (type & MTS)
 160                 printk("MTS ");
 161          if (type & D2620)
 162                 printk("D2620 ");
 163          if (type & D2633)
 164                 printk("D2633 ");
 165          if (type & DTV6)
 166                 printk("DTV6 ");
 167          if (type & QAM)
 168                 printk("QAM ");
 169          if (type & DTV7)
 170                 printk("DTV7 ");
 171          if (type & DTV78)
 172                 printk("DTV78 ");
 173          if (type & DTV8)
 174                 printk("DTV8 ");
 175          if (type & FM)
 176                 printk("FM ");
 177          if (type & INPUT1)
 178                 printk("INPUT1 ");
 179          if (type & LCD)
 180                 printk("LCD ");
 181          if (type & NOGD)
 182                 printk("NOGD ");
 183          if (type & MONO)
 184                 printk("MONO ");
 185          if (type & ATSC)
 186                 printk("ATSC ");
 187          if (type & IF)
 188                 printk("IF ");
 189          if (type & LG60)
 190                 printk("LG60 ");
 191          if (type & ATI638)
 192                 printk("ATI638 ");
 193          if (type & OREN538)
 194                 printk("OREN538 ");
 195          if (type & OREN36)
 196                 printk("OREN36 ");
 197          if (type & TOYOTA388)
 198                 printk("TOYOTA388 ");
 199          if (type & TOYOTA794)
 200                 printk("TOYOTA794 ");
 201          if (type & DIBCOM52)
 202                 printk("DIBCOM52 ");
 203          if (type & ZARLINK456)
 204                 printk("ZARLINK456 ");
 205          if (type & CHINA)
 206                 printk("CHINA ");
 207          if (type & F6MHZ)
 208                 printk("F6MHZ ");
 209          if (type & INPUT2)
 210                 printk("INPUT2 ");
 211          if (type & SCODE)
 212                 printk("SCODE ");
 213          if (type & HAS_IF)
 214                 printk("HAS_IF_%d ", int_freq);
 215 }
 216
 217 static  v4l2_std_id parse_audio_std_option(void)
 218 {
 219         if (strcasecmp(audio_std, "A2") == 0)
 220                 return V4L2_STD_A2;
 221         if (strcasecmp(audio_std, "A2/A") == 0)
 222                 return V4L2_STD_A2_A;
 223         if (strcasecmp(audio_std, "A2/B") == 0)
 224                 return V4L2_STD_A2_B;
 225         if (strcasecmp(audio_std, "NICAM") == 0)
 226                 return V4L2_STD_NICAM;
 227         if (strcasecmp(audio_std, "NICAM/A") == 0)
 228                 return V4L2_STD_NICAM_A;
 229         if (strcasecmp(audio_std, "NICAM/B") == 0)
 230                 return V4L2_STD_NICAM_B;
 231
 232         return 0;
 233 }
 234
 235 static void free_firmware(struct xc2028_data *priv)
 236 {
 237         int i;
 238         tuner_dbg("%s called\n", __func__);
 239
 240         if (!priv->firm)
 241                 return;
 242
 243         for (i = 0; i < priv->firm_size; i++)
 244                 kfree(priv->firm[i].ptr);
 245
 246         kfree(priv->firm);
 247
 248         priv->firm = NULL;
 249         priv->firm_size = 0;
 250
 251         memset(&priv->cur_fw, 0, sizeof(priv->cur_fw));
 252 }
 253
 254 static int load_all_firmwares(struct dvb_frontend *fe)
 255 {
 256         struct xc2028_data    *priv = fe->tuner_priv;
 257         const struct firmware *fw   = NULL;
 258         unsigned char         *p, *endp;
 259         int                   rc = 0;
 260         int                   n, n_array;
 261         char                  name[33];
 262         char                  *fname;
 263
 264         tuner_dbg("%s called\n", __func__);
 265
 266         if (!firmware_name[0])
 267                 fname = priv->ctrl.fname;
 268         else
 269                 fname = firmware_name;
 270
 271         tuner_dbg("Reading firmware %s\n", fname);
 272         rc = request_firmware(&fw, fname, &priv->i2c_props.adap->dev);
 273         if (rc < 0) {
 274                 if (rc == -ENOENT)
 275                         tuner_err("Error: firmware %s not found.\n",
 276                                    fname);
 277                 else
 278                         tuner_err("Error %d while requesting firmware %s \n",
 279                                    rc, fname);
 280
 281                 return rc;
 282         }
 283         p = fw->data;
 284         endp = p + fw->size;
 285
 286         if (fw->size < sizeof(name) - 1 + 2 + 2) {
 287                 tuner_err("Error: firmware file %s has invalid size!\n",
 288                           fname);
 289                 goto corrupt;
 290         }
 291
 292         memcpy(name, p, sizeof(name) - 1);
 293         name[sizeof(name) - 1] = 0;
 294         p += sizeof(name) - 1;
 295
 296         priv->firm_version = le16_to_cpu(*(__u16 *) p);
 297         p += 2;
 298
 299         n_array = le16_to_cpu(*(__u16 *) p);
 300         p += 2;
 301
 302         tuner_info("Loading %d firmware images from %s, type: %s, ver %d.%d\n",
 303                    n_array, fname, name,
 304                    priv->firm_version >> 8, priv->firm_version & 0xff);
 305
 306         priv->firm = kzalloc(sizeof(*priv->firm) * n_array, GFP_KERNEL);
 307         if (priv->firm == NULL) {
 308                 tuner_err("Not enough memory to load firmware file.\n");
 309                 rc = -ENOMEM;
 310                 goto err;
 311         }
 312         priv->firm_size = n_array;
 313
 314         n = -1;
 315         while (p < endp) {
 316                 __u32 type, size;
 317                 v4l2_std_id id;
 318                 __u16 int_freq = 0;
 319
 320                 n++;
 321                 if (n >= n_array) {
 322                         tuner_err("More firmware images in file than "
 323                                   "were expected!\n");
 324                         goto corrupt;
 325                 }
 326
 327                 /* Checks if there's enough bytes to read */
 328                 if (p + sizeof(type) + sizeof(id) + sizeof(size) > endp) {
 329                         tuner_err("Firmware header is incomplete!\n");
 330                         goto corrupt;
 331                 }
 332
 333                 type = le32_to_cpu(*(__u32 *) p);
 334                 p += sizeof(type);
 335
 336                 id = le64_to_cpu(*(v4l2_std_id *) p);
 337                 p += sizeof(id);
 338
 339                 if (type & HAS_IF) {
 340                         int_freq = le16_to_cpu(*(__u16 *) p);
 341                         p += sizeof(int_freq);
 342                 }
 343
 344                 size = le32_to_cpu(*(__u32 *) p);
 345                 p += sizeof(size);
 346
 347                 if ((!size) || (size + p > endp)) {
 348                         tuner_err("Firmware type ");
 349                         dump_firm_type(type);
 350                         printk("(%x), id %llx is corrupted "
 351                                "(size=%d, expected %d)\n",
 352                                type, (unsigned long long)id,
 353                                (unsigned)(endp - p), size);
 354                         goto corrupt;
 355                 }
 356
 357                 priv->firm[n].ptr = kzalloc(size, GFP_KERNEL);
 358                 if (priv->firm[n].ptr == NULL) {
 359                         tuner_err("Not enough memory to load firmware file.\n");
 360                         rc = -ENOMEM;
 361                         goto err;
 362                 }
 363                 tuner_dbg("Reading firmware type ");
 364                 if (debug) {
 365                         dump_firm_type_and_int_freq(type, int_freq);
 366                         printk("(%x), id %llx, size=%d.\n",
 367                                type, (unsigned long long)id, size);
 368                 }
 369
 370                 memcpy(priv->firm[n].ptr, p, size);
 371                 priv->firm[n].type = type;
 372                 priv->firm[n].id   = id;
 373                 priv->firm[n].size = size;
 374                 priv->firm[n].int_freq = int_freq;
 375
 376                 p += size;
 377         }
 378
 379         if (n + 1 != priv->firm_size) {
 380                 tuner_err("Firmware file is incomplete!\n");
 381                 goto corrupt;
 382         }
 383
 384         goto done;
 385
 386 corrupt:
 387         rc = -EINVAL;
 388         tuner_err("Error: firmware file is corrupted!\n");
 389
 390 err:
 391         tuner_info("Releasing partially loaded firmware file.\n");
 392         free_firmware(priv);
 393
 394 done:
 395         release_firmware(fw);
 396         if (rc == 0)
 397                 tuner_dbg("Firmware files loaded.\n");
 398
 399         return rc;
 400 }
 401
 402 static int seek_firmware(struct dvb_frontend *fe, unsigned int type,
 403                          v4l2_std_id *id)
 404 {
 405         struct xc2028_data *priv = fe->tuner_priv;
 406         int                 i, best_i = -1, best_nr_matches = 0;
 407         unsigned int        type_mask = 0;
 408
 409         tuner_dbg("%s called, want type=", __func__);
 410         if (debug) {
 411                 dump_firm_type(type);
 412                 printk("(%x), id %016llx.\n", type, (unsigned long long)*id);
 413         }
 414
 415         if (!priv->firm) {
 416                 tuner_err("Error! firmware not loaded\n");
 417                 return -EINVAL;
 418         }
 419
 420         if (((type & ~SCODE) == 0) && (*id == 0))
 421                 *id = V4L2_STD_PAL;
 422
 423         if (type & BASE)
 424                 type_mask = BASE_TYPES;
 425         else if (type & SCODE) {
 426                 type &= SCODE_TYPES;
 427                 type_mask = SCODE_TYPES & ~HAS_IF;
 428         } else if (type & DTV_TYPES)
 429                 type_mask = DTV_TYPES;
 430         else if (type & STD_SPECIFIC_TYPES)
 431                 type_mask = STD_SPECIFIC_TYPES;
 432
 433         type &= type_mask;
 434
 435         if (!type & SCODE)
 436                 type_mask = ~0;
 437
 438         /* Seek for exact match */
 439         for (i = 0; i < priv->firm_size; i++) {
 440                 if ((type == (priv->firm[i].type & type_mask)) &&
 441                     (*id == priv->firm[i].id))
 442                         goto found;
 443         }
 444
 445         /* Seek for generic video standard match */
 446         for (i = 0; i < priv->firm_size; i++) {
 447                 v4l2_std_id match_mask;
 448                 int nr_matches;
 449
 450                 if (type != (priv->firm[i].type & type_mask))
 451                         continue;
 452
 453                 match_mask = *id & priv->firm[i].id;
 454                 if (!match_mask)
 455                         continue;
 456
 457                 if ((*id & match_mask) == *id)
 458                         goto found; /* Supports all the requested standards */
 459
 460                 nr_matches = hweight64(match_mask);
 461                 if (nr_matches > best_nr_matches) {
 462                         best_nr_matches = nr_matches;
 463                         best_i = i;
 464                 }
 465         }
 466
 467         if (best_nr_matches > 0) {
 468                 tuner_dbg("Selecting best matching firmware (%d bits) for "
 469                           "type=", best_nr_matches);
 470                 dump_firm_type(type);
 471                 printk("(%x), id %016llx:\n", type, (unsigned long long)*id);
 472                 i = best_i;
 473                 goto found;
 474         }
 475
 476         /*FIXME: Would make sense to seek for type "hint" match ? */
 477
 478         i = -ENOENT;
 479         goto ret;
 480
 481 found:
 482         *id = priv->firm[i].id;
 483
 484 ret:
 485         tuner_dbg("%s firmware for type=", (i < 0) ? "Can't find" : "Found");
 486         if (debug) {
 487                 dump_firm_type(type);
 488                 printk("(%x), id %016llx.\n", type, (unsigned long long)*id);
 489         }
 490         return i;
 491 }
 492
 493 static int load_firmware(struct dvb_frontend *fe, unsigned int type,
 494                          v4l2_std_id *id)
 495 {
 496         struct xc2028_data *priv = fe->tuner_priv;
 497         int                pos, rc;
 498         unsigned char      *p, *endp, buf[priv->ctrl.max_len];
 499
 500         tuner_dbg("%s called\n", __func__);
 501
 502         pos = seek_firmware(fe, type, id);
 503         if (pos < 0)
 504                 return pos;
 505
 506         tuner_info("Loading firmware for type=");
 507         dump_firm_type(priv->firm[pos].type);
 508         printk("(%x), id %016llx.\n", priv->firm[pos].type,
 509                (unsigned long long)*id);
 510
 511         p = priv->firm[pos].ptr;
 512         endp = p + priv->firm[pos].size;
 513
 514         while (p < endp) {
 515                 __u16 size;
 516
 517                 /* Checks if there's enough bytes to read */
 518                 if (p + sizeof(size) > endp) {
 519                         tuner_err("Firmware chunk size is wrong\n");
 520                         return -EINVAL;
 521                 }
 522
 523                 size = le16_to_cpu(*(__u16 *) p);
 524                 p += sizeof(size);
 525
 526                 if (size == 0xffff)
 527                         return 0;
 528
 529                 if (!size) {
 530                         /* Special callback command received */
 531                         rc = priv->tuner_callback(priv->video_dev,
 532                                                   XC2028_TUNER_RESET, 0);
 533                         if (rc < 0) {
 534                                 tuner_err("Error at RESET code %d\n",
 535                                            (*p) & 0x7f);
 536                                 return -EINVAL;
 537                         }
 538                         continue;
 539                 }
 540                 if (size >= 0xff00) {
 541                         switch (size) {
 542                         case 0xff00:
 543                                 rc = priv->tuner_callback(priv->video_dev,
 544                                                         XC2028_RESET_CLK, 0);
 545                                 if (rc < 0) {
 546                                         tuner_err("Error at RESET code %d\n",
 547                                                   (*p) & 0x7f);
 548                                         return -EINVAL;
 549                                 }
 550                                 break;
 551                         default:
 552                                 tuner_info("Invalid RESET code %d\n",
 553                                            size & 0x7f);
 554                                 return -EINVAL;
 555
 556                         }
 557                         continue;
 558                 }
 559
 560                 /* Checks for a sleep command */
 561                 if (size & 0x8000) {
 562                         msleep(size & 0x7fff);
 563                         continue;
 564                 }
 565
 566                 if ((size + p > endp)) {
 567                         tuner_err("missing bytes: need %d, have %d\n",
 568                                    size, (int)(endp - p));
 569                         return -EINVAL;
 570                 }
 571
 572                 buf[0] = *p;
 573                 p++;
 574                 size--;
 575
 576                 /* Sends message chunks */
 577                 while (size > 0) {
 578                         int len = (size < priv->ctrl.max_len - 1) ?
 579                                    size : priv->ctrl.max_len - 1;
 580
 581                         memcpy(buf + 1, p, len);
 582
 583                         rc = i2c_send(priv, buf, len + 1);
 584                         if (rc < 0) {
 585                                 tuner_err("%d returned from send\n", rc);
 586                                 return -EINVAL;
 587                         }
 588
 589                         p += len;
 590                         size -= len;
 591                 }
 592         }
 593         return 0;
 594 }
 595
 596 static int load_scode(struct dvb_frontend *fe, unsigned int type,
 597                          v4l2_std_id *id, __u16 int_freq, int scode)
 598 {
 599         struct xc2028_data *priv = fe->tuner_priv;
 600         int                pos, rc;
 601         unsigned char      *p;
 602
 603         tuner_dbg("%s called\n", __func__);
 604
 605         if (!int_freq) {
 606                 pos = seek_firmware(fe, type, id);
 607                 if (pos < 0)
 608                         return pos;
 609         } else {
 610                 for (pos = 0; pos < priv->firm_size; pos++) {
 611                         if ((priv->firm[pos].int_freq == int_freq) &&
 612                             (priv->firm[pos].type & HAS_IF))
 613                                 break;
 614                 }
 615                 if (pos == priv->firm_size)
 616                         return -ENOENT;
 617         }
 618
 619         p = priv->firm[pos].ptr;
 620
 621         if (priv->firm[pos].type & HAS_IF) {
 622                 if (priv->firm[pos].size != 12 * 16 || scode >= 16)
 623                         return -EINVAL;
 624                 p += 12 * scode;
 625         } else {
 626                 /* 16 SCODE entries per file; each SCODE entry is 12 bytes and
 627                  * has a 2-byte size header in the firmware format. */
 628                 if (priv->firm[pos].size != 14 * 16 || scode >= 16 ||
 629                     le16_to_cpu(*(__u16 *)(p + 14 * scode)) != 12)
 630                         return -EINVAL;
 631                 p += 14 * scode + 2;
 632         }
 633
 634         tuner_info("Loading SCODE for type=");
 635         dump_firm_type_and_int_freq(priv->firm[pos].type,
 636                                     priv->firm[pos].int_freq);
 637         printk("(%x), id %016llx.\n", priv->firm[pos].type,
 638                (unsigned long long)*id);
 639
 640         if (priv->firm_version < 0x0202)
 641                 rc = send_seq(priv, {0x20, 0x00, 0x00, 0x00});
 642         else
 643                 rc = send_seq(priv, {0xa0, 0x00, 0x00, 0x00});
 644         if (rc < 0)
 645                 return -EIO;
 646
 647         rc = i2c_send(priv, p, 12);
 648         if (rc < 0)
 649                 return -EIO;
 650
 651         rc = send_seq(priv, {0x00, 0x8c});
 652         if (rc < 0)
 653                 return -EIO;
 654
 655         return 0;
 656 }
 657
 658 static int check_firmware(struct dvb_frontend *fe, unsigned int type,
 659                           v4l2_std_id std, __u16 int_freq)
 660 {
 661         struct xc2028_data         *priv = fe->tuner_priv;
 662         struct firmware_properties new_fw;
 663         int                        rc = 0, is_retry = 0;
 664         u16                        version, hwmodel;
 665         v4l2_std_id                std0;
 666
 667         tuner_dbg("%s called\n", __func__);
 668
 669         if (!priv->firm) {
 670                 if (!priv->ctrl.fname) {
 671                         tuner_info("xc2028/3028 firmware name not set!\n");
 672                         return -EINVAL;
 673                 }
 674
 675                 rc = load_all_firmwares(fe);
 676                 if (rc < 0)
 677                         return rc;
 678         }
 679
 680         if (priv->ctrl.mts && !(type & FM))
 681                 type |= MTS;
 682
 683 retry:
 684         new_fw.type = type;
 685         new_fw.id = std;
 686         new_fw.std_req = std;
 687         new_fw.scode_table = SCODE | priv->ctrl.scode_table;
 688         new_fw.scode_nr = 0;
 689         new_fw.int_freq = int_freq;
 690
 691         tuner_dbg("checking firmware, user requested type=");
 692         if (debug) {
 693                 dump_firm_type(new_fw.type);
 694                 printk("(%x), id %016llx, ", new_fw.type,
 695                        (unsigned long long)new_fw.std_req);
 696                 if (!int_freq) {
 697                         printk("scode_tbl ");
 698                         dump_firm_type(priv->ctrl.scode_table);
 699                         printk("(%x), ", priv->ctrl.scode_table);
 700                 } else
 701                         printk("int_freq %d, ", new_fw.int_freq);
 702                 printk("scode_nr %d\n", new_fw.scode_nr);
 703         }
 704
 705         /* No need to reload base firmware if it matches */
 706         if (((BASE | new_fw.type) & BASE_TYPES) ==
 707             (priv->cur_fw.type & BASE_TYPES)) {
 708                 tuner_dbg("BASE firmware not changed.\n");
 709                 goto skip_base;
 710         }
 711
 712         /* Updating BASE - forget about all currently loaded firmware */
 713         memset(&priv->cur_fw, 0, sizeof(priv->cur_fw));
 714
 715         /* Reset is needed before loading firmware */
 716         rc = priv->tuner_callback(priv->video_dev,
 717                                   XC2028_TUNER_RESET, 0);
 718         if (rc < 0)
 719                 goto fail;
 720
 721         /* BASE firmwares are all std0 */
 722         std0 = 0;
 723         rc = load_firmware(fe, BASE | new_fw.type, &std0);
 724         if (rc < 0) {
 725                 tuner_err("Error %d while loading base firmware\n",
 726                           rc);
 727                 goto fail;
 728         }
 729
 730         /* Load INIT1, if needed */
 731         tuner_dbg("Load init1 firmware, if exists\n");
 732
 733         rc = load_firmware(fe, BASE | INIT1 | new_fw.type, &std0);
 734         if (rc == -ENOENT)
 735                 rc = load_firmware(fe, (BASE | INIT1 | new_fw.type) & ~F8MHZ,
 736                                    &std0);
 737         if (rc < 0 && rc != -ENOENT) {
 738                 tuner_err("Error %d while loading init1 firmware\n",
 739                           rc);
 740                 goto fail;
 741         }
 742
 743 skip_base:
 744         /*
 745          * No need to reload standard specific firmware if base firmware
 746          * was not reloaded and requested video standards have not changed.
 747          */
 748         if (priv->cur_fw.type == (BASE | new_fw.type) &&
 749             priv->cur_fw.std_req == std) {
 750                 tuner_dbg("Std-specific firmware already loaded.\n");
 751                 goto skip_std_specific;
 752         }
 753
 754         /* Reloading std-specific firmware forces a SCODE update */
 755         priv->cur_fw.scode_table = 0;
 756
 757         rc = load_firmware(fe, new_fw.type, &new_fw.id);
 758         if (rc == -ENOENT)
 759                 rc = load_firmware(fe, new_fw.type & ~F8MHZ, &new_fw.id);
 760
 761         if (rc < 0)
 762                 goto fail;
 763
 764 skip_std_specific:
 765         if (priv->cur_fw.scode_table == new_fw.scode_table &&
 766             priv->cur_fw.scode_nr == new_fw.scode_nr) {
 767                 tuner_dbg("SCODE firmware already loaded.\n");
 768                 goto check_device;
 769         }
 770
 771         if (new_fw.type & FM)
 772                 goto check_device;
 773
 774         /* Load SCODE firmware, if exists */
 775         tuner_dbg("Trying to load scode %d\n", new_fw.scode_nr);
 776
 777         rc = load_scode(fe, new_fw.type | new_fw.scode_table, &new_fw.id,
 778                         new_fw.int_freq, new_fw.scode_nr);
 779
 780 check_device:
 781         if (xc2028_get_reg(priv, 0x0004, &version) < 0 ||
 782             xc2028_get_reg(priv, 0x0008, &hwmodel) < 0) {
 783                 tuner_err("Unable to read tuner registers.\n");
 784                 goto fail;
 785         }
 786
 787         tuner_info("Device is Xceive %d version %d.%d, "
 788                    "firmware version %d.%d\n",
 789                    hwmodel, (version & 0xf000) >> 12, (version & 0xf00) >> 8,
 790                    (version & 0xf0) >> 4, version & 0xf);
 791
 792         /* Check firmware version against what we downloaded. */
 793         if (priv->firm_version != ((version & 0xf0) << 4 | (version & 0x0f))) {
 794                 tuner_err("Incorrect readback of firmware version.\n");
 795                 goto fail;
 796         }
 797
 798         /* Check that the tuner hardware model remains consistent over time. */
 799         if (priv->hwmodel == 0 && (hwmodel == 2028 || hwmodel == 3028)) {
 800                 priv->hwmodel = hwmodel;
 801                 priv->hwvers  = version & 0xff00;
 802         } else if (priv->hwmodel == 0 || priv->hwmodel != hwmodel ||
 803                    priv->hwvers != (version & 0xff00)) {
 804                 tuner_err("Read invalid device hardware information - tuner "
 805                           "hung?\n");
 806                 goto fail;
 807         }
 808
 809         memcpy(&priv->cur_fw, &new_fw, sizeof(priv->cur_fw));
 810
 811         /*
 812          * By setting BASE in cur_fw.type only after successfully loading all
 813          * firmwares, we can:
 814          * 1. Identify that BASE firmware with type=0 has been loaded;
 815          * 2. Tell whether BASE firmware was just changed the next time through.
 816          */
 817         priv->cur_fw.type |= BASE;
 818
 819         return 0;
 820
 821 fail:
 822         memset(&priv->cur_fw, 0, sizeof(priv->cur_fw));
 823         if (!is_retry) {
 824                 msleep(50);
 825                 is_retry = 1;
 826                 tuner_dbg("Retrying firmware load\n");
 827                 goto retry;
 828         }
 829
 830         if (rc == -ENOENT)
 831                 rc = -EINVAL;
 832         return rc;
 833 }
 834
 835 static int xc2028_signal(struct dvb_frontend *fe, u16 *strength)
 836 {
 837         struct xc2028_data *priv = fe->tuner_priv;
 838         u16                 frq_lock, signal = 0;
 839         int                 rc;
 840
 841         tuner_dbg("%s called\n", __func__);
 842
 843         mutex_lock(&priv->lock);
 844
 845         /* Sync Lock Indicator */
 846         rc = xc2028_get_reg(priv, 0x0002, &frq_lock);
 847         if (rc < 0 || frq_lock == 0)
 848                 goto ret;
 849
 850         /* Frequency is locked. Return signal quality */
 851
 852         /* Get SNR of the video signal */
 853         rc = xc2028_get_reg(priv, 0x0040, &signal);
 854         if (rc < 0)
 855                 signal = -frq_lock;
 856
 857 ret:
 858         mutex_unlock(&priv->lock);
 859
 860         *strength = signal;
 861
 862         return rc;
 863 }
 864
 865 #define DIV 15625
 866
 867 static int generic_set_freq(struct dvb_frontend *fe, u32 freq /* in HZ */,
 868                             enum tuner_mode new_mode,
 869                             unsigned int type,
 870                             v4l2_std_id std,
 871                             u16 int_freq)
 872 {
 873         struct xc2028_data *priv = fe->tuner_priv;
 874         int                rc = -EINVAL;
 875         unsigned char      buf[4];
 876         u32                div, offset = 0;
 877
 878         tuner_dbg("%s called\n", __func__);
 879
 880         mutex_lock(&priv->lock);
 881
 882         tuner_dbg("should set frequency %d kHz\n", freq / 1000);
 883
 884         if (check_firmware(fe, type, std, int_freq) < 0)
 885                 goto ret;
 886
 887         /* On some cases xc2028 can disable video output, if
 888          * very weak signals are received. By sending a soft
 889          * reset, this is re-enabled. So, it is better to always
 890          * send a soft reset before changing channels, to be sure
 891          * that xc2028 will be in a safe state.
 892          * Maybe this might also be needed for DTV.
 893          */
 894         if (new_mode == T_ANALOG_TV) {
 895                 rc = send_seq(priv, {0x00, 0x00});
 896         } else if (priv->cur_fw.type & ATSC) {
 897                 offset = 1750000;
 898         } else {
 899                 offset = 2750000;
 900                 /*
 901                  * We must adjust the offset by 500kHz in two cases in order
 902                  * to correctly center the IF output:
 903                  * 1) When the ZARLINK456 or DIBCOM52 tables were explicitly
 904                  *    selected and a 7MHz channel is tuned;
 905                  * 2) When tuning a VHF channel with DTV78 firmware.
 906                  */
 907                 if (((priv->cur_fw.type & DTV7) &&
 908                      (priv->cur_fw.scode_table & (ZARLINK456 | DIBCOM52))) ||
 909                     ((priv->cur_fw.type & DTV78) && freq < 470000000))
 910                         offset -= 500000;
 911         }
 912
 913         div = (freq - offset + DIV / 2) / DIV;
 914
 915         /* CMD= Set frequency */
 916         if (priv->firm_version < 0x0202)
 917                 rc = send_seq(priv, {0x00, 0x02, 0x00, 0x00});
 918         else
 919                 rc = send_seq(priv, {0x80, 0x02, 0x00, 0x00});
 920         if (rc < 0)
 921                 goto ret;
 922
 923         /* Return code shouldn't be checked.
 924            The reset CLK is needed only with tm6000.
 925            Driver should work fine even if this fails.
 926          */
 927         priv->tuner_callback(priv->video_dev, XC2028_RESET_CLK, 1);
 928
 929         msleep(10);
 930
 931         buf[0] = 0xff & (div >> 24);
 932         buf[1] = 0xff & (div >> 16);
 933         buf[2] = 0xff & (div >> 8);
 934         buf[3] = 0xff & (div);
 935
 936         rc = i2c_send(priv, buf, sizeof(buf));
 937         if (rc < 0)
 938                 goto ret;
 939         msleep(100);
 940
 941         priv->frequency = freq;
 942
 943         tuner_dbg("divisor= %02x %02x %02x %02x (freq=%d.%03d)\n",
 944                buf[0], buf[1], buf[2], buf[3],
 945                freq / 1000000, (freq % 1000000) / 1000);
 946
 947         rc = 0;
 948
 949 ret:
 950         mutex_unlock(&priv->lock);
 951
 952         return rc;
 953 }
 954
 955 static int xc2028_set_analog_freq(struct dvb_frontend *fe,
 956                               struct analog_parameters *p)
 957 {
 958         struct xc2028_data *priv = fe->tuner_priv;
 959         unsigned int       type=0;
 960
 961         tuner_dbg("%s called\n", __func__);
 962
 963         if (p->mode == V4L2_TUNER_RADIO) {
 964                 type |= FM;
 965                 if (priv->ctrl.input1)
 966                         type |= INPUT1;
 967                 return generic_set_freq(fe, (625l * p->frequency) / 10,
 968                                 T_ANALOG_TV, type, 0, 0);
 969         }
 970
 971         /* if std is not defined, choose one */
 972         if (!p->std)
 973                 p->std = V4L2_STD_MN;
 974
 975         /* PAL/M, PAL/N, PAL/Nc and NTSC variants should use 6MHz firmware */
 976         if (!(p->std & V4L2_STD_MN))
 977                 type |= F8MHZ;
 978
 979         /* Add audio hack to std mask */
 980         p->std |= parse_audio_std_option();
 981
 982         return generic_set_freq(fe, 62500l * p->frequency,
 983                                 T_ANALOG_TV, type, p->std, 0);
 984 }
 985
 986 static int xc2028_set_params(struct dvb_frontend *fe,
 987                              struct dvb_frontend_parameters *p)
 988 {
 989         struct xc2028_data *priv = fe->tuner_priv;
 990         unsigned int       type=0;
 991         fe_bandwidth_t     bw = BANDWIDTH_8_MHZ;
 992         u16                demod = 0;
 993
 994         tuner_dbg("%s called\n", __func__);
 995
 996         if (priv->ctrl.d2633)
 997                 type |= D2633;
 998         else
 999                 type |= D2620;
1000
1001         switch(fe->ops.info.type) {
1002         case FE_OFDM:
1003                 bw = p->u.ofdm.bandwidth;
1004                 break;
1005         case FE_QAM:
1006                 tuner_info("WARN: There are some reports that "
1007                            "QAM 6 MHz doesn't work.\n"
1008                            "If this works for you, please report by "
1009                            "e-mail to: v4l-dvb-maintainer@linuxtv.org\n");
1010                 bw = BANDWIDTH_6_MHZ;
1011                 type |= QAM;
1012                 break;
1013         case FE_ATSC:
1014                 bw = BANDWIDTH_6_MHZ;
1015                 /* The only ATSC firmware (at least on v2.7) is D2633,
1016                    so overrides ctrl->d2633 */
1017                 type |= ATSC| D2633;
1018                 type &= ~D2620;
1019                 break;
1020         /* DVB-S is not supported */
1021         default:
1022                 return -EINVAL;
1023         }
1024
1025         switch (bw) {
1026         case BANDWIDTH_8_MHZ:
1027                 if (p->frequency < 470000000)
1028                         priv->ctrl.vhfbw7 = 0;
1029                 else
1030                         priv->ctrl.uhfbw8 = 1;
1031                 type |= (priv->ctrl.vhfbw7 && priv->ctrl.uhfbw8) ? DTV78 : DTV8;
1032                 type |= F8MHZ;
1033                 break;
1034         case BANDWIDTH_7_MHZ:
1035                 if (p->frequency < 470000000)
1036                         priv->ctrl.vhfbw7 = 1;
1037                 else
1038                         priv->ctrl.uhfbw8 = 0;
1039                 type |= (priv->ctrl.vhfbw7 && priv->ctrl.uhfbw8) ? DTV78 : DTV7;
1040                 type |= F8MHZ;
1041                 break;
1042         case BANDWIDTH_6_MHZ:
1043                 type |= DTV6;
1044                 priv->ctrl.vhfbw7 = 0;
1045                 priv->ctrl.uhfbw8 = 0;
1046                 break;
1047         default:
1048                 tuner_err("error: bandwidth not supported.\n");
1049         };
1050
1051         /* All S-code tables need a 200kHz shift */
1052         if (priv->ctrl.demod)
1053                 demod = priv->ctrl.demod + 200;
1054
1055         return generic_set_freq(fe, p->frequency,
1056                                 T_DIGITAL_TV, type, 0, demod);
1057 }
1058
1059
1060 static int xc2028_dvb_release(struct dvb_frontend *fe)
1061 {
1062         struct xc2028_data *priv = fe->tuner_priv;
1063
1064         tuner_dbg("%s called\n", __func__);
1065
1066         mutex_lock(&xc2028_list_mutex);
1067
1068         priv->count--;
1069
1070         if (!priv->count) {
1071                 list_del(&priv->xc2028_list);
1072
1073                 kfree(priv->ctrl.fname);
1074
1075                 free_firmware(priv);
1076                 kfree(priv);
1077                 fe->tuner_priv = NULL;
1078         }
1079
1080         mutex_unlock(&xc2028_list_mutex);
1081
1082         return 0;
1083 }
1084
1085 static int xc2028_get_frequency(struct dvb_frontend *fe, u32 *frequency)
1086 {
1087         struct xc2028_data *priv = fe->tuner_priv;
1088
1089         tuner_dbg("%s called\n", __func__);
1090
1091         *frequency = priv->frequency;
1092
1093         return 0;
1094 }
1095
1096 static int xc2028_set_config(struct dvb_frontend *fe, void *priv_cfg)
1097 {
1098         struct xc2028_data *priv = fe->tuner_priv;
1099         struct xc2028_ctrl *p    = priv_cfg;
1100         int                 rc   = 0;
1101
1102         tuner_dbg("%s called\n", __func__);
1103
1104         mutex_lock(&priv->lock);
1105
1106         memcpy(&priv->ctrl, p, sizeof(priv->ctrl));
1107         if (priv->ctrl.max_len < 9)
1108                 priv->ctrl.max_len = 13;
1109
1110         if (p->fname) {
1111                 if (priv->ctrl.fname && strcmp(p->fname, priv->ctrl.fname)) {
1112                         kfree(priv->ctrl.fname);
1113                         free_firmware(priv);
1114                 }
1115
1116                 priv->ctrl.fname = kstrdup(p->fname, GFP_KERNEL);
1117                 if (priv->ctrl.fname == NULL)
1118                         rc = -ENOMEM;
1119         }
1120
1121         mutex_unlock(&priv->lock);
1122
1123         return rc;
1124 }
1125
1126 static const struct dvb_tuner_ops xc2028_dvb_tuner_ops = {
1127         .info = {
1128                  .name = "Xceive XC3028",
1129                  .frequency_min = 42000000,
1130                  .frequency_max = 864000000,
1131                  .frequency_step = 50000,
1132                  },
1133
1134         .set_config        = xc2028_set_config,
1135         .set_analog_params = xc2028_set_analog_freq,
1136         .release           = xc2028_dvb_release,
1137         .get_frequency     = xc2028_get_frequency,
1138         .get_rf_strength   = xc2028_signal,
1139         .set_params        = xc2028_set_params,
1140 };
1141
1142 struct dvb_frontend *xc2028_attach(struct dvb_frontend *fe,
1143                                    struct xc2028_config *cfg)
1144 {
1145         struct xc2028_data *priv;
1146         void               *video_dev;
1147
1148         if (debug)
1149                 printk(KERN_DEBUG "xc2028: Xcv2028/3028 init called!\n");
1150
1151         if (NULL == cfg)
1152                 return NULL;
1153
1154         if (!fe) {
1155                 printk(KERN_ERR "xc2028: No frontend!\n");
1156                 return NULL;
1157         }
1158
1159         video_dev = cfg->i2c_adap->algo_data;
1160
1161         if (debug)
1162                 printk(KERN_DEBUG "xc2028: video_dev =%p\n", video_dev);
1163
1164         mutex_lock(&xc2028_list_mutex);
1165
1166         list_for_each_entry(priv, &xc2028_list, xc2028_list) {
1167                 if (&priv->i2c_props.adap->dev == &cfg->i2c_adap->dev) {
1168                         video_dev = NULL;
1169                         if (debug)
1170                                 printk(KERN_DEBUG "xc2028: reusing device\n");
1171
1172                         break;
1173                 }
1174         }
1175
1176         if (video_dev) {
1177                 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
1178                 if (priv == NULL) {
1179                         mutex_unlock(&xc2028_list_mutex);
1180                         return NULL;
1181                 }
1182
1183                 priv->i2c_props.addr = cfg->i2c_addr;
1184                 priv->i2c_props.adap = cfg->i2c_adap;
1185                 priv->i2c_props.name = "xc2028";
1186
1187                 priv->video_dev = video_dev;
1188                 priv->tuner_callback = cfg->callback;
1189                 priv->ctrl.max_len = 13;
1190
1191                 mutex_init(&priv->lock);
1192
1193                 list_add_tail(&priv->xc2028_list, &xc2028_list);
1194         }
1195
1196         fe->tuner_priv = priv;
1197         priv->count++;
1198
1199         if (debug)
1200                 printk(KERN_DEBUG "xc2028: usage count is %i\n", priv->count);
1201
1202         memcpy(&fe->ops.tuner_ops, &xc2028_dvb_tuner_ops,
1203                sizeof(xc2028_dvb_tuner_ops));
1204
1205         tuner_info("type set to %s\n", "XCeive xc2028/xc3028 tuner");
1206
1207         if (cfg->ctrl)
1208                 xc2028_set_config(fe, cfg->ctrl);
1209
1210         mutex_unlock(&xc2028_list_mutex);
1211
1212         return fe;
1213 }
1214
1215 EXPORT_SYMBOL(xc2028_attach);
1216
1217 MODULE_DESCRIPTION("Xceive xc2028/xc3028 tuner driver");
1218 MODULE_AUTHOR("Michel Ludwig <michel.ludwig@gmail.com>");
1219 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
1220 MODULE_LICENSE("GPL");