drivers/media/common/tuners/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 <linux/slab.h>
  19 #include <asm/unaligned.h>
  20 #include "tuner-i2c.h"
  21 #include "tuner-xc2028.h"
  22 #include "tuner-xc2028-types.h"
  23
  24 #include <linux/dvb/frontend.h>
  25 #include "dvb_frontend.h"
  26
  27
  28 static int debug;
  29 module_param(debug, int, 0644);
  30 MODULE_PARM_DESC(debug, "enable verbose debug messages");
  31
  32 static int no_poweroff;
  33 module_param(no_poweroff, int, 0644);
  34 MODULE_PARM_DESC(no_poweroff, "0 (default) powers device off when not used.\n"
  35         "1 keep device energized and with tuner ready all the times.\n"
  36         "  Faster, but consumes more power and keeps the device hotter\n");
  37
  38 static char audio_std[8];
  39 module_param_string(audio_std, audio_std, sizeof(audio_std), 0);
  40 MODULE_PARM_DESC(audio_std,
  41         "Audio standard. XC3028 audio decoder explicitly "
  42         "needs to know what audio\n"
  43         "standard is needed for some video standards with audio A2 or NICAM.\n"
  44         "The valid values are:\n"
  45         "A2\n"
  46         "A2/A\n"
  47         "A2/B\n"
  48         "NICAM\n"
  49         "NICAM/A\n"
  50         "NICAM/B\n");
  51
  52 static char firmware_name[30];
  53 module_param_string(firmware_name, firmware_name, sizeof(firmware_name), 0);
  54 MODULE_PARM_DESC(firmware_name, "Firmware file name. Allows overriding the "
  55                                 "default firmware name\n");
  56
  57 static LIST_HEAD(hybrid_tuner_instance_list);
  58 static DEFINE_MUTEX(xc2028_list_mutex);
  59
  60 /* struct for storing firmware table */
  61 struct firmware_description {
  62         unsigned int  type;
  63         v4l2_std_id   id;
  64         __u16         int_freq;
  65         unsigned char *ptr;
  66         unsigned int  size;
  67 };
  68
  69 struct firmware_properties {
  70         unsigned int    type;
  71         v4l2_std_id     id;
  72         v4l2_std_id     std_req;
  73         __u16           int_freq;
  74         unsigned int    scode_table;
  75         int             scode_nr;
  76 };
  77
  78 struct xc2028_data {
  79         struct list_head        hybrid_tuner_instance_list;
  80         struct tuner_i2c_props  i2c_props;
  81         __u32                   frequency;
  82
  83         struct firmware_description *firm;
  84         int                     firm_size;
  85         __u16                   firm_version;
  86
  87         __u16                   hwmodel;
  88         __u16                   hwvers;
  89
  90         struct xc2028_ctrl      ctrl;
  91
  92         struct firmware_properties cur_fw;
  93
  94         struct mutex lock;
  95 };
  96
  97 #define i2c_send(priv, buf, size) ({                                    \
  98         int _rc;                                                        \
  99         _rc = tuner_i2c_xfer_send(&priv->i2c_props, buf, size);         \
 100         if (size != _rc)                                                \
 101                 tuner_info("i2c output error: rc = %d (should be %d)\n",\
 102                            _rc, (int)size);                             \
 103         if (priv->ctrl.msleep)                                          \
 104                 msleep(priv->ctrl.msleep);                              \
 105         _rc;                                                            \
 106 })
 107
 108 #define i2c_rcv(priv, buf, size) ({                                     \
 109         int _rc;                                                        \
 110         _rc = tuner_i2c_xfer_recv(&priv->i2c_props, buf, size);         \
 111         if (size != _rc)                                                \
 112                 tuner_err("i2c input error: rc = %d (should be %d)\n",  \
 113                            _rc, (int)size);                             \
 114         _rc;                                                            \
 115 })
 116
 117 #define i2c_send_recv(priv, obuf, osize, ibuf, isize) ({                \
 118         int _rc;                                                        \
 119         _rc = tuner_i2c_xfer_send_recv(&priv->i2c_props, obuf, osize,   \
 120                                        ibuf, isize);                    \
 121         if (isize != _rc)                                               \
 122                 tuner_err("i2c input error: rc = %d (should be %d)\n",  \
 123                            _rc, (int)isize);                            \
 124         if (priv->ctrl.msleep)                                          \
 125                 msleep(priv->ctrl.msleep);                              \
 126         _rc;                                                            \
 127 })
 128
 129 #define send_seq(priv, data...) ({                                      \
 130         static u8 _val[] = data;                                        \
 131         int _rc;                                                        \
 132         if (sizeof(_val) !=                                             \
 133                         (_rc = tuner_i2c_xfer_send(&priv->i2c_props,    \
 134                                                 _val, sizeof(_val)))) { \
 135                 tuner_err("Error on line %d: %d\n", __LINE__, _rc);     \
 136         } else if (priv->ctrl.msleep)                                   \
 137                 msleep(priv->ctrl.msleep);                              \
 138         _rc;                                                            \
 139 })
 140
 141 static int xc2028_get_reg(struct xc2028_data *priv, u16 reg, u16 *val)
 142 {
 143         unsigned char buf[2];
 144         unsigned char ibuf[2];
 145
 146         tuner_dbg("%s %04x called\n", __func__, reg);
 147
 148         buf[0] = reg >> 8;
 149         buf[1] = (unsigned char) reg;
 150
 151         if (i2c_send_recv(priv, buf, 2, ibuf, 2) != 2)
 152                 return -EIO;
 153
 154         *val = (ibuf[1]) | (ibuf[0] << 8);
 155         return 0;
 156 }
 157
 158 #define dump_firm_type(t)       dump_firm_type_and_int_freq(t, 0)
 159 static void dump_firm_type_and_int_freq(unsigned int type, u16 int_freq)
 160 {
 161          if (type & BASE)
 162                 printk("BASE ");
 163          if (type & INIT1)
 164                 printk("INIT1 ");
 165          if (type & F8MHZ)
 166                 printk("F8MHZ ");
 167          if (type & MTS)
 168                 printk("MTS ");
 169          if (type & D2620)
 170                 printk("D2620 ");
 171          if (type & D2633)
 172                 printk("D2633 ");
 173          if (type & DTV6)
 174                 printk("DTV6 ");
 175          if (type & QAM)
 176                 printk("QAM ");
 177          if (type & DTV7)
 178                 printk("DTV7 ");
 179          if (type & DTV78)
 180                 printk("DTV78 ");
 181          if (type & DTV8)
 182                 printk("DTV8 ");
 183          if (type & FM)
 184                 printk("FM ");
 185          if (type & INPUT1)
 186                 printk("INPUT1 ");
 187          if (type & LCD)
 188                 printk("LCD ");
 189          if (type & NOGD)
 190                 printk("NOGD ");
 191          if (type & MONO)
 192                 printk("MONO ");
 193          if (type & ATSC)
 194                 printk("ATSC ");
 195          if (type & IF)
 196                 printk("IF ");
 197          if (type & LG60)
 198                 printk("LG60 ");
 199          if (type & ATI638)
 200                 printk("ATI638 ");
 201          if (type & OREN538)
 202                 printk("OREN538 ");
 203          if (type & OREN36)
 204                 printk("OREN36 ");
 205          if (type & TOYOTA388)
 206                 printk("TOYOTA388 ");
 207          if (type & TOYOTA794)
 208                 printk("TOYOTA794 ");
 209          if (type & DIBCOM52)
 210                 printk("DIBCOM52 ");
 211          if (type & ZARLINK456)
 212                 printk("ZARLINK456 ");
 213          if (type & CHINA)
 214                 printk("CHINA ");
 215          if (type & F6MHZ)
 216                 printk("F6MHZ ");
 217          if (type & INPUT2)
 218                 printk("INPUT2 ");
 219          if (type & SCODE)
 220                 printk("SCODE ");
 221          if (type & HAS_IF)
 222                 printk("HAS_IF_%d ", int_freq);
 223 }
 224
 225 static  v4l2_std_id parse_audio_std_option(void)
 226 {
 227         if (strcasecmp(audio_std, "A2") == 0)
 228                 return V4L2_STD_A2;
 229         if (strcasecmp(audio_std, "A2/A") == 0)
 230                 return V4L2_STD_A2_A;
 231         if (strcasecmp(audio_std, "A2/B") == 0)
 232                 return V4L2_STD_A2_B;
 233         if (strcasecmp(audio_std, "NICAM") == 0)
 234                 return V4L2_STD_NICAM;
 235         if (strcasecmp(audio_std, "NICAM/A") == 0)
 236                 return V4L2_STD_NICAM_A;
 237         if (strcasecmp(audio_std, "NICAM/B") == 0)
 238                 return V4L2_STD_NICAM_B;
 239
 240         return 0;
 241 }
 242
 243 static void free_firmware(struct xc2028_data *priv)
 244 {
 245         int i;
 246         tuner_dbg("%s called\n", __func__);
 247
 248         if (!priv->firm)
 249                 return;
 250
 251         for (i = 0; i < priv->firm_size; i++)
 252                 kfree(priv->firm[i].ptr);
 253
 254         kfree(priv->firm);
 255
 256         priv->firm = NULL;
 257         priv->firm_size = 0;
 258
 259         memset(&priv->cur_fw, 0, sizeof(priv->cur_fw));
 260 }
 261
 262 static int load_all_firmwares(struct dvb_frontend *fe)
 263 {
 264         struct xc2028_data    *priv = fe->tuner_priv;
 265         const struct firmware *fw   = NULL;
 266         const unsigned char   *p, *endp;
 267         int                   rc = 0;
 268         int                   n, n_array;
 269         char                  name[33];
 270         char                  *fname;
 271
 272         tuner_dbg("%s called\n", __func__);
 273
 274         if (!firmware_name[0])
 275                 fname = priv->ctrl.fname;
 276         else
 277                 fname = firmware_name;
 278
 279         tuner_dbg("Reading firmware %s\n", fname);
 280         rc = request_firmware(&fw, fname, priv->i2c_props.adap->dev.parent);
 281         if (rc < 0) {
 282                 if (rc == -ENOENT)
 283                         tuner_err("Error: firmware %s not found.\n",
 284                                    fname);
 285                 else
 286                         tuner_err("Error %d while requesting firmware %s \n",
 287                                    rc, fname);
 288
 289                 return rc;
 290         }
 291         p = fw->data;
 292         endp = p + fw->size;
 293
 294         if (fw->size < sizeof(name) - 1 + 2 + 2) {
 295                 tuner_err("Error: firmware file %s has invalid size!\n",
 296                           fname);
 297                 goto corrupt;
 298         }
 299
 300         memcpy(name, p, sizeof(name) - 1);
 301         name[sizeof(name) - 1] = 0;
 302         p += sizeof(name) - 1;
 303
 304         priv->firm_version = get_unaligned_le16(p);
 305         p += 2;
 306
 307         n_array = get_unaligned_le16(p);
 308         p += 2;
 309
 310         tuner_info("Loading %d firmware images from %s, type: %s, ver %d.%d\n",
 311                    n_array, fname, name,
 312                    priv->firm_version >> 8, priv->firm_version & 0xff);
 313
 314         priv->firm = kzalloc(sizeof(*priv->firm) * n_array, GFP_KERNEL);
 315         if (priv->firm == NULL) {
 316                 tuner_err("Not enough memory to load firmware file.\n");
 317                 rc = -ENOMEM;
 318                 goto err;
 319         }
 320         priv->firm_size = n_array;
 321
 322         n = -1;
 323         while (p < endp) {
 324                 __u32 type, size;
 325                 v4l2_std_id id;
 326                 __u16 int_freq = 0;
 327
 328                 n++;
 329                 if (n >= n_array) {
 330                         tuner_err("More firmware images in file than "
 331                                   "were expected!\n");
 332                         goto corrupt;
 333                 }
 334
 335                 /* Checks if there's enough bytes to read */
 336                 if (endp - p < sizeof(type) + sizeof(id) + sizeof(size))
 337                         goto header;
 338
 339                 type = get_unaligned_le32(p);
 340                 p += sizeof(type);
 341
 342                 id = get_unaligned_le64(p);
 343                 p += sizeof(id);
 344
 345                 if (type & HAS_IF) {
 346                         int_freq = get_unaligned_le16(p);
 347                         p += sizeof(int_freq);
 348                         if (endp - p < sizeof(size))
 349                                 goto header;
 350                 }
 351
 352                 size = get_unaligned_le32(p);
 353                 p += sizeof(size);
 354
 355                 if (!size || size > endp - p) {
 356                         tuner_err("Firmware type ");
 357                         dump_firm_type(type);
 358                         printk("(%x), id %llx is corrupted "
 359                                "(size=%d, expected %d)\n",
 360                                type, (unsigned long long)id,
 361                                (unsigned)(endp - p), size);
 362                         goto corrupt;
 363                 }
 364
 365                 priv->firm[n].ptr = kzalloc(size, GFP_KERNEL);
 366                 if (priv->firm[n].ptr == NULL) {
 367                         tuner_err("Not enough memory to load firmware file.\n");
 368                         rc = -ENOMEM;
 369                         goto err;
 370                 }
 371                 tuner_dbg("Reading firmware type ");
 372                 if (debug) {
 373                         dump_firm_type_and_int_freq(type, int_freq);
 374                         printk("(%x), id %llx, size=%d.\n",
 375                                type, (unsigned long long)id, size);
 376                 }
 377
 378                 memcpy(priv->firm[n].ptr, p, size);
 379                 priv->firm[n].type = type;
 380                 priv->firm[n].id   = id;
 381                 priv->firm[n].size = size;
 382                 priv->firm[n].int_freq = int_freq;
 383
 384                 p += size;
 385         }
 386
 387         if (n + 1 != priv->firm_size) {
 388                 tuner_err("Firmware file is incomplete!\n");
 389                 goto corrupt;
 390         }
 391
 392         goto done;
 393
 394 header:
 395         tuner_err("Firmware header is incomplete!\n");
 396 corrupt:
 397         rc = -EINVAL;
 398         tuner_err("Error: firmware file is corrupted!\n");
 399
 400 err:
 401         tuner_info("Releasing partially loaded firmware file.\n");
 402         free_firmware(priv);
 403
 404 done:
 405         release_firmware(fw);
 406         if (rc == 0)
 407                 tuner_dbg("Firmware files loaded.\n");
 408
 409         return rc;
 410 }
 411
 412 static int seek_firmware(struct dvb_frontend *fe, unsigned int type,
 413                          v4l2_std_id *id)
 414 {
 415         struct xc2028_data *priv = fe->tuner_priv;
 416         int                 i, best_i = -1, best_nr_matches = 0;
 417         unsigned int        type_mask = 0;
 418
 419         tuner_dbg("%s called, want type=", __func__);
 420         if (debug) {
 421                 dump_firm_type(type);
 422                 printk("(%x), id %016llx.\n", type, (unsigned long long)*id);
 423         }
 424
 425         if (!priv->firm) {
 426                 tuner_err("Error! firmware not loaded\n");
 427                 return -EINVAL;
 428         }
 429
 430         if (((type & ~SCODE) == 0) && (*id == 0))
 431                 *id = V4L2_STD_PAL;
 432
 433         if (type & BASE)
 434                 type_mask = BASE_TYPES;
 435         else if (type & SCODE) {
 436                 type &= SCODE_TYPES;
 437                 type_mask = SCODE_TYPES & ~HAS_IF;
 438         } else if (type & DTV_TYPES)
 439                 type_mask = DTV_TYPES;
 440         else if (type & STD_SPECIFIC_TYPES)
 441                 type_mask = STD_SPECIFIC_TYPES;
 442
 443         type &= type_mask;
 444
 445         if (!(type & SCODE))
 446                 type_mask = ~0;
 447
 448         /* Seek for exact match */
 449         for (i = 0; i < priv->firm_size; i++) {
 450                 if ((type == (priv->firm[i].type & type_mask)) &&
 451                     (*id == priv->firm[i].id))
 452                         goto found;
 453         }
 454
 455         /* Seek for generic video standard match */
 456         for (i = 0; i < priv->firm_size; i++) {
 457                 v4l2_std_id match_mask;
 458                 int nr_matches;
 459
 460                 if (type != (priv->firm[i].type & type_mask))
 461                         continue;
 462
 463                 match_mask = *id & priv->firm[i].id;
 464                 if (!match_mask)
 465                         continue;
 466
 467                 if ((*id & match_mask) == *id)
 468                         goto found; /* Supports all the requested standards */
 469
 470                 nr_matches = hweight64(match_mask);
 471                 if (nr_matches > best_nr_matches) {
 472                         best_nr_matches = nr_matches;
 473                         best_i = i;
 474                 }
 475         }
 476
 477         if (best_nr_matches > 0) {
 478                 tuner_dbg("Selecting best matching firmware (%d bits) for "
 479                           "type=", best_nr_matches);
 480                 dump_firm_type(type);
 481                 printk("(%x), id %016llx:\n", type, (unsigned long long)*id);
 482                 i = best_i;
 483                 goto found;
 484         }
 485
 486         /*FIXME: Would make sense to seek for type "hint" match ? */
 487
 488         i = -ENOENT;
 489         goto ret;
 490
 491 found:
 492         *id = priv->firm[i].id;
 493
 494 ret:
 495         tuner_dbg("%s firmware for type=", (i < 0) ? "Can't find" : "Found");
 496         if (debug) {
 497                 dump_firm_type(type);
 498                 printk("(%x), id %016llx.\n", type, (unsigned long long)*id);
 499         }
 500         return i;
 501 }
 502
 503 static inline int do_tuner_callback(struct dvb_frontend *fe, int cmd, int arg)
 504 {
 505         struct xc2028_data *priv = fe->tuner_priv;
 506
 507         /* analog side (tuner-core) uses i2c_adap->algo_data.
 508          * digital side is not guaranteed to have algo_data defined.
 509          *
 510          * digital side will always have fe->dvb defined.
 511          * analog side (tuner-core) doesn't (yet) define fe->dvb.
 512          */
 513
 514         return (!fe->callback) ? -EINVAL :
 515                 fe->callback(((fe->dvb) && (fe->dvb->priv)) ?
 516                                 fe->dvb->priv : priv->i2c_props.adap->algo_data,
 517                              DVB_FRONTEND_COMPONENT_TUNER, cmd, arg);
 518 }
 519
 520 static int load_firmware(struct dvb_frontend *fe, unsigned int type,
 521                          v4l2_std_id *id)
 522 {
 523         struct xc2028_data *priv = fe->tuner_priv;
 524         int                pos, rc;
 525         unsigned char      *p, *endp, buf[priv->ctrl.max_len];
 526
 527         tuner_dbg("%s called\n", __func__);
 528
 529         pos = seek_firmware(fe, type, id);
 530         if (pos < 0)
 531                 return pos;
 532
 533         tuner_info("Loading firmware for type=");
 534         dump_firm_type(priv->firm[pos].type);
 535         printk("(%x), id %016llx.\n", priv->firm[pos].type,
 536                (unsigned long long)*id);
 537
 538         p = priv->firm[pos].ptr;
 539         endp = p + priv->firm[pos].size;
 540
 541         while (p < endp) {
 542                 __u16 size;
 543
 544                 /* Checks if there's enough bytes to read */
 545                 if (p + sizeof(size) > endp) {
 546                         tuner_err("Firmware chunk size is wrong\n");
 547                         return -EINVAL;
 548                 }
 549
 550                 size = le16_to_cpu(*(__u16 *) p);
 551                 p += sizeof(size);
 552
 553                 if (size == 0xffff)
 554                         return 0;
 555
 556                 if (!size) {
 557                         /* Special callback command received */
 558                         rc = do_tuner_callback(fe, XC2028_TUNER_RESET, 0);
 559                         if (rc < 0) {
 560                                 tuner_err("Error at RESET code %d\n",
 561                                            (*p) & 0x7f);
 562                                 return -EINVAL;
 563                         }
 564                         continue;
 565                 }
 566                 if (size >= 0xff00) {
 567                         switch (size) {
 568                         case 0xff00:
 569                                 rc = do_tuner_callback(fe, XC2028_RESET_CLK, 0);
 570                                 if (rc < 0) {
 571                                         tuner_err("Error at RESET code %d\n",
 572                                                   (*p) & 0x7f);
 573                                         return -EINVAL;
 574                                 }
 575                                 break;
 576                         default:
 577                                 tuner_info("Invalid RESET code %d\n",
 578                                            size & 0x7f);
 579                                 return -EINVAL;
 580
 581                         }
 582                         continue;
 583                 }
 584
 585                 /* Checks for a sleep command */
 586                 if (size & 0x8000) {
 587                         msleep(size & 0x7fff);
 588                         continue;
 589                 }
 590
 591                 if ((size + p > endp)) {
 592                         tuner_err("missing bytes: need %d, have %d\n",
 593                                    size, (int)(endp - p));
 594                         return -EINVAL;
 595                 }
 596
 597                 buf[0] = *p;
 598                 p++;
 599                 size--;
 600
 601                 /* Sends message chunks */
 602                 while (size > 0) {
 603                         int len = (size < priv->ctrl.max_len - 1) ?
 604                                    size : priv->ctrl.max_len - 1;
 605
 606                         memcpy(buf + 1, p, len);
 607
 608                         rc = i2c_send(priv, buf, len + 1);
 609                         if (rc < 0) {
 610                                 tuner_err("%d returned from send\n", rc);
 611                                 return -EINVAL;
 612                         }
 613
 614                         p += len;
 615                         size -= len;
 616                 }
 617
 618                 /* silently fail if the frontend doesn't support I2C flush */
 619                 rc = do_tuner_callback(fe, XC2028_I2C_FLUSH, 0);
 620                 if ((rc < 0) && (rc != -EINVAL)) {
 621                         tuner_err("error executing flush: %d\n", rc);
 622                         return rc;
 623                 }
 624         }
 625         return 0;
 626 }
 627
 628 static int load_scode(struct dvb_frontend *fe, unsigned int type,
 629                          v4l2_std_id *id, __u16 int_freq, int scode)
 630 {
 631         struct xc2028_data *priv = fe->tuner_priv;
 632         int                pos, rc;
 633         unsigned char      *p;
 634
 635         tuner_dbg("%s called\n", __func__);
 636
 637         if (!int_freq) {
 638                 pos = seek_firmware(fe, type, id);
 639                 if (pos < 0)
 640                         return pos;
 641         } else {
 642                 for (pos = 0; pos < priv->firm_size; pos++) {
 643                         if ((priv->firm[pos].int_freq == int_freq) &&
 644                             (priv->firm[pos].type & HAS_IF))
 645                                 break;
 646                 }
 647                 if (pos == priv->firm_size)
 648                         return -ENOENT;
 649         }
 650
 651         p = priv->firm[pos].ptr;
 652
 653         if (priv->firm[pos].type & HAS_IF) {
 654                 if (priv->firm[pos].size != 12 * 16 || scode >= 16)
 655                         return -EINVAL;
 656                 p += 12 * scode;
 657         } else {
 658                 /* 16 SCODE entries per file; each SCODE entry is 12 bytes and
 659                  * has a 2-byte size header in the firmware format. */
 660                 if (priv->firm[pos].size != 14 * 16 || scode >= 16 ||
 661                     le16_to_cpu(*(__u16 *)(p + 14 * scode)) != 12)
 662                         return -EINVAL;
 663                 p += 14 * scode + 2;
 664         }
 665
 666         tuner_info("Loading SCODE for type=");
 667         dump_firm_type_and_int_freq(priv->firm[pos].type,
 668                                     priv->firm[pos].int_freq);
 669         printk("(%x), id %016llx.\n", priv->firm[pos].type,
 670                (unsigned long long)*id);
 671
 672         if (priv->firm_version < 0x0202)
 673                 rc = send_seq(priv, {0x20, 0x00, 0x00, 0x00});
 674         else
 675                 rc = send_seq(priv, {0xa0, 0x00, 0x00, 0x00});
 676         if (rc < 0)
 677                 return -EIO;
 678
 679         rc = i2c_send(priv, p, 12);
 680         if (rc < 0)
 681                 return -EIO;
 682
 683         rc = send_seq(priv, {0x00, 0x8c});
 684         if (rc < 0)
 685                 return -EIO;
 686
 687         return 0;
 688 }
 689
 690 static int check_firmware(struct dvb_frontend *fe, unsigned int type,
 691                           v4l2_std_id std, __u16 int_freq)
 692 {
 693         struct xc2028_data         *priv = fe->tuner_priv;
 694         struct firmware_properties new_fw;
 695         int                        rc = 0, retry_count = 0;
 696         u16                        version, hwmodel;
 697         v4l2_std_id                std0;
 698
 699         tuner_dbg("%s called\n", __func__);
 700
 701         if (!priv->firm) {
 702                 if (!priv->ctrl.fname) {
 703                         tuner_info("xc2028/3028 firmware name not set!\n");
 704                         return -EINVAL;
 705                 }
 706
 707                 rc = load_all_firmwares(fe);
 708                 if (rc < 0)
 709                         return rc;
 710         }
 711
 712         if (priv->ctrl.mts && !(type & FM))
 713                 type |= MTS;
 714
 715 retry:
 716         new_fw.type = type;
 717         new_fw.id = std;
 718         new_fw.std_req = std;
 719         new_fw.scode_table = SCODE | priv->ctrl.scode_table;
 720         new_fw.scode_nr = 0;
 721         new_fw.int_freq = int_freq;
 722
 723         tuner_dbg("checking firmware, user requested type=");
 724         if (debug) {
 725                 dump_firm_type(new_fw.type);
 726                 printk("(%x), id %016llx, ", new_fw.type,
 727                        (unsigned long long)new_fw.std_req);
 728                 if (!int_freq) {
 729                         printk("scode_tbl ");
 730                         dump_firm_type(priv->ctrl.scode_table);
 731                         printk("(%x), ", priv->ctrl.scode_table);
 732                 } else
 733                         printk("int_freq %d, ", new_fw.int_freq);
 734                 printk("scode_nr %d\n", new_fw.scode_nr);
 735         }
 736
 737         /* No need to reload base firmware if it matches */
 738         if (((BASE | new_fw.type) & BASE_TYPES) ==
 739             (priv->cur_fw.type & BASE_TYPES)) {
 740                 tuner_dbg("BASE firmware not changed.\n");
 741                 goto skip_base;
 742         }
 743
 744         /* Updating BASE - forget about all currently loaded firmware */
 745         memset(&priv->cur_fw, 0, sizeof(priv->cur_fw));
 746
 747         /* Reset is needed before loading firmware */
 748         rc = do_tuner_callback(fe, XC2028_TUNER_RESET, 0);
 749         if (rc < 0)
 750                 goto fail;
 751
 752         /* BASE firmwares are all std0 */
 753         std0 = 0;
 754         rc = load_firmware(fe, BASE | new_fw.type, &std0);
 755         if (rc < 0) {
 756                 tuner_err("Error %d while loading base firmware\n",
 757                           rc);
 758                 goto fail;
 759         }
 760
 761         /* Load INIT1, if needed */
 762         tuner_dbg("Load init1 firmware, if exists\n");
 763
 764         rc = load_firmware(fe, BASE | INIT1 | new_fw.type, &std0);
 765         if (rc == -ENOENT)
 766                 rc = load_firmware(fe, (BASE | INIT1 | new_fw.type) & ~F8MHZ,
 767                                    &std0);
 768         if (rc < 0 && rc != -ENOENT) {
 769                 tuner_err("Error %d while loading init1 firmware\n",
 770                           rc);
 771                 goto fail;
 772         }
 773
 774 skip_base:
 775         /*
 776          * No need to reload standard specific firmware if base firmware
 777          * was not reloaded and requested video standards have not changed.
 778          */
 779         if (priv->cur_fw.type == (BASE | new_fw.type) &&
 780             priv->cur_fw.std_req == std) {
 781                 tuner_dbg("Std-specific firmware already loaded.\n");
 782                 goto skip_std_specific;
 783         }
 784
 785         /* Reloading std-specific firmware forces a SCODE update */
 786         priv->cur_fw.scode_table = 0;
 787
 788         rc = load_firmware(fe, new_fw.type, &new_fw.id);
 789         if (rc == -ENOENT)
 790                 rc = load_firmware(fe, new_fw.type & ~F8MHZ, &new_fw.id);
 791
 792         if (rc < 0)
 793                 goto fail;
 794
 795 skip_std_specific:
 796         if (priv->cur_fw.scode_table == new_fw.scode_table &&
 797             priv->cur_fw.scode_nr == new_fw.scode_nr) {
 798                 tuner_dbg("SCODE firmware already loaded.\n");
 799                 goto check_device;
 800         }
 801
 802         if (new_fw.type & FM)
 803                 goto check_device;
 804
 805         /* Load SCODE firmware, if exists */
 806         tuner_dbg("Trying to load scode %d\n", new_fw.scode_nr);
 807
 808         rc = load_scode(fe, new_fw.type | new_fw.scode_table, &new_fw.id,
 809                         new_fw.int_freq, new_fw.scode_nr);
 810
 811 check_device:
 812         if (xc2028_get_reg(priv, 0x0004, &version) < 0 ||
 813             xc2028_get_reg(priv, 0x0008, &hwmodel) < 0) {
 814                 tuner_err("Unable to read tuner registers.\n");
 815                 goto fail;
 816         }
 817
 818         tuner_dbg("Device is Xceive %d version %d.%d, "
 819                   "firmware version %d.%d\n",
 820                   hwmodel, (version & 0xf000) >> 12, (version & 0xf00) >> 8,
 821                   (version & 0xf0) >> 4, version & 0xf);
 822
 823
 824         if (priv->ctrl.read_not_reliable)
 825                 goto read_not_reliable;
 826
 827         /* Check firmware version against what we downloaded. */
 828         if (priv->firm_version != ((version & 0xf0) << 4 | (version & 0x0f))) {
 829                 if (!priv->ctrl.read_not_reliable) {
 830                         tuner_err("Incorrect readback of firmware version.\n");
 831                         goto fail;
 832                 } else {
 833                         tuner_err("Returned an incorrect version. However, "
 834                                   "read is not reliable enough. Ignoring it.\n");
 835                         hwmodel = 3028;
 836                 }
 837         }
 838
 839         /* Check that the tuner hardware model remains consistent over time. */
 840         if (priv->hwmodel == 0 && (hwmodel == 2028 || hwmodel == 3028)) {
 841                 priv->hwmodel = hwmodel;
 842                 priv->hwvers  = version & 0xff00;
 843         } else if (priv->hwmodel == 0 || priv->hwmodel != hwmodel ||
 844                    priv->hwvers != (version & 0xff00)) {
 845                 tuner_err("Read invalid device hardware information - tuner "
 846                           "hung?\n");
 847                 goto fail;
 848         }
 849
 850 read_not_reliable:
 851         memcpy(&priv->cur_fw, &new_fw, sizeof(priv->cur_fw));
 852
 853         /*
 854          * By setting BASE in cur_fw.type only after successfully loading all
 855          * firmwares, we can:
 856          * 1. Identify that BASE firmware with type=0 has been loaded;
 857          * 2. Tell whether BASE firmware was just changed the next time through.
 858          */
 859         priv->cur_fw.type |= BASE;
 860
 861         return 0;
 862
 863 fail:
 864         memset(&priv->cur_fw, 0, sizeof(priv->cur_fw));
 865         if (retry_count < 8) {
 866                 msleep(50);
 867                 retry_count++;
 868                 tuner_dbg("Retrying firmware load\n");
 869                 goto retry;
 870         }
 871
 872         if (rc == -ENOENT)
 873                 rc = -EINVAL;
 874         return rc;
 875 }
 876
 877 static int xc2028_signal(struct dvb_frontend *fe, u16 *strength)
 878 {
 879         struct xc2028_data *priv = fe->tuner_priv;
 880         u16                 frq_lock, signal = 0;
 881         int                 rc;
 882
 883         tuner_dbg("%s called\n", __func__);
 884
 885         mutex_lock(&priv->lock);
 886
 887         /* Sync Lock Indicator */
 888         rc = xc2028_get_reg(priv, 0x0002, &frq_lock);
 889         if (rc < 0)
 890                 goto ret;
 891
 892         /* Frequency is locked */
 893         if (frq_lock == 1)
 894                 signal = 32768;
 895
 896         /* Get SNR of the video signal */
 897         rc = xc2028_get_reg(priv, 0x0040, &signal);
 898         if (rc < 0)
 899                 goto ret;
 900
 901         /* Use both frq_lock and signal to generate the result */
 902         signal = signal || ((signal & 0x07) << 12);
 903
 904 ret:
 905         mutex_unlock(&priv->lock);
 906
 907         *strength = signal;
 908
 909         tuner_dbg("signal strength is %d\n", signal);
 910
 911         return rc;
 912 }
 913
 914 #define DIV 15625
 915
 916 static int generic_set_freq(struct dvb_frontend *fe, u32 freq /* in HZ */,
 917                             enum v4l2_tuner_type new_type,
 918                             unsigned int type,
 919                             v4l2_std_id std,
 920                             u16 int_freq)
 921 {
 922         struct xc2028_data *priv = fe->tuner_priv;
 923         int                rc = -EINVAL;
 924         unsigned char      buf[4];
 925         u32                div, offset = 0;
 926
 927         tuner_dbg("%s called\n", __func__);
 928
 929         mutex_lock(&priv->lock);
 930
 931         tuner_dbg("should set frequency %d kHz\n", freq / 1000);
 932
 933         if (check_firmware(fe, type, std, int_freq) < 0)
 934                 goto ret;
 935
 936         /* On some cases xc2028 can disable video output, if
 937          * very weak signals are received. By sending a soft
 938          * reset, this is re-enabled. So, it is better to always
 939          * send a soft reset before changing channels, to be sure
 940          * that xc2028 will be in a safe state.
 941          * Maybe this might also be needed for DTV.
 942          */
 943         if (new_type == V4L2_TUNER_ANALOG_TV) {
 944                 rc = send_seq(priv, {0x00, 0x00});
 945
 946                 /* Analog modes require offset = 0 */
 947         } else {
 948                 /*
 949                  * Digital modes require an offset to adjust to the
 950                  * proper frequency. The offset depends on what
 951                  * firmware version is used.
 952                  */
 953
 954                 /*
 955                  * Adjust to the center frequency. This is calculated by the
 956                  * formula: offset = 1.25MHz - BW/2
 957                  * For DTV 7/8, the firmware uses BW = 8000, so it needs a
 958                  * further adjustment to get the frequency center on VHF
 959                  */
 960                 if (priv->cur_fw.type & DTV6)
 961                         offset = 1750000;
 962                 else if (priv->cur_fw.type & DTV7)
 963                         offset = 2250000;
 964                 else    /* DTV8 or DTV78 */
 965                         offset = 2750000;
 966                 if ((priv->cur_fw.type & DTV78) && freq < 470000000)
 967                         offset -= 500000;
 968
 969                 /*
 970                  * xc3028 additional "magic"
 971                  * Depending on the firmware version, it needs some adjustments
 972                  * to properly centralize the frequency. This seems to be
 973                  * needed to compensate the SCODE table adjustments made by
 974                  * newer firmwares
 975                  */
 976
 977 #if 1
 978                 /*
 979                  * The proper adjustment would be to do it at s-code table.
 980                  * However, this didn't work, as reported by
 981                  * Robert Lowery <rglowery@exemail.com.au>
 982                  */
 983
 984                 if (priv->cur_fw.type & DTV7)
 985                         offset += 500000;
 986
 987 #else
 988                 /*
 989                  * Still need tests for XC3028L (firmware 3.2 or upper)
 990                  * So, for now, let's just comment the per-firmware
 991                  * version of this change. Reports with xc3028l working
 992                  * with and without the lines bellow are welcome
 993                  */
 994
 995                 if (priv->firm_version < 0x0302) {
 996                         if (priv->cur_fw.type & DTV7)
 997                                 offset += 500000;
 998                 } else {
 999                         if (priv->cur_fw.type & DTV7)
1000                                 offset -= 300000;
1001                         else if (type != ATSC) /* DVB @6MHz, DTV 8 and DTV 7/8 */
1002                                 offset += 200000;
1003                 }
1004 #endif
1005         }
1006
1007         div = (freq - offset + DIV / 2) / DIV;
1008
1009         /* CMD= Set frequency */
1010         if (priv->firm_version < 0x0202)
1011                 rc = send_seq(priv, {0x00, 0x02, 0x00, 0x00});
1012         else
1013                 rc = send_seq(priv, {0x80, 0x02, 0x00, 0x00});
1014         if (rc < 0)
1015                 goto ret;
1016
1017         /* Return code shouldn't be checked.
1018            The reset CLK is needed only with tm6000.
1019            Driver should work fine even if this fails.
1020          */
1021         if (priv->ctrl.msleep)
1022                 msleep(priv->ctrl.msleep);
1023         do_tuner_callback(fe, XC2028_RESET_CLK, 1);
1024
1025         msleep(10);
1026
1027         buf[0] = 0xff & (div >> 24);
1028         buf[1] = 0xff & (div >> 16);
1029         buf[2] = 0xff & (div >> 8);
1030         buf[3] = 0xff & (div);
1031
1032         rc = i2c_send(priv, buf, sizeof(buf));
1033         if (rc < 0)
1034                 goto ret;
1035         msleep(100);
1036
1037         priv->frequency = freq;
1038
1039         tuner_dbg("divisor= %02x %02x %02x %02x (freq=%d.%03d)\n",
1040                buf[0], buf[1], buf[2], buf[3],
1041                freq / 1000000, (freq % 1000000) / 1000);
1042
1043         rc = 0;
1044
1045 ret:
1046         mutex_unlock(&priv->lock);
1047
1048         return rc;
1049 }
1050
1051 static int xc2028_set_analog_freq(struct dvb_frontend *fe,
1052                               struct analog_parameters *p)
1053 {
1054         struct xc2028_data *priv = fe->tuner_priv;
1055         unsigned int       type=0;
1056
1057         tuner_dbg("%s called\n", __func__);
1058
1059         if (p->mode == V4L2_TUNER_RADIO) {
1060                 type |= FM;
1061                 if (priv->ctrl.input1)
1062                         type |= INPUT1;
1063                 return generic_set_freq(fe, (625l * p->frequency) / 10,
1064                                 V4L2_TUNER_RADIO, type, 0, 0);
1065         }
1066
1067         /* if std is not defined, choose one */
1068         if (!p->std)
1069                 p->std = V4L2_STD_MN;
1070
1071         /* PAL/M, PAL/N, PAL/Nc and NTSC variants should use 6MHz firmware */
1072         if (!(p->std & V4L2_STD_MN))
1073                 type |= F8MHZ;
1074
1075         /* Add audio hack to std mask */
1076         p->std |= parse_audio_std_option();
1077
1078         return generic_set_freq(fe, 62500l * p->frequency,
1079                                 V4L2_TUNER_ANALOG_TV, type, p->std, 0);
1080 }
1081
1082 static int xc2028_set_params(struct dvb_frontend *fe,
1083                              struct dvb_frontend_parameters *p)
1084 {
1085         struct xc2028_data *priv = fe->tuner_priv;
1086         unsigned int       type=0;
1087         fe_bandwidth_t     bw = BANDWIDTH_8_MHZ;
1088         u16                demod = 0;
1089
1090         tuner_dbg("%s called\n", __func__);
1091
1092         switch(fe->ops.info.type) {
1093         case FE_OFDM:
1094                 bw = p->u.ofdm.bandwidth;
1095                 /*
1096                  * The only countries with 6MHz seem to be Taiwan/Uruguay.
1097                  * Both seem to require QAM firmware for OFDM decoding
1098                  * Tested in Taiwan by Terry Wu <terrywu2009@gmail.com>
1099                  */
1100                 if (bw == BANDWIDTH_6_MHZ)
1101                         type |= QAM;
1102                 break;
1103         case FE_ATSC:
1104                 bw = BANDWIDTH_6_MHZ;
1105                 /* The only ATSC firmware (at least on v2.7) is D2633 */
1106                 type |= ATSC | D2633;
1107                 break;
1108         /* DVB-S and pure QAM (FE_QAM) are not supported */
1109         default:
1110                 return -EINVAL;
1111         }
1112
1113         switch (bw) {
1114         case BANDWIDTH_8_MHZ:
1115                 if (p->frequency < 470000000)
1116                         priv->ctrl.vhfbw7 = 0;
1117                 else
1118                         priv->ctrl.uhfbw8 = 1;
1119                 type |= (priv->ctrl.vhfbw7 && priv->ctrl.uhfbw8) ? DTV78 : DTV8;
1120                 type |= F8MHZ;
1121                 break;
1122         case BANDWIDTH_7_MHZ:
1123                 if (p->frequency < 470000000)
1124                         priv->ctrl.vhfbw7 = 1;
1125                 else
1126                         priv->ctrl.uhfbw8 = 0;
1127                 type |= (priv->ctrl.vhfbw7 && priv->ctrl.uhfbw8) ? DTV78 : DTV7;
1128                 type |= F8MHZ;
1129                 break;
1130         case BANDWIDTH_6_MHZ:
1131                 type |= DTV6;
1132                 priv->ctrl.vhfbw7 = 0;
1133                 priv->ctrl.uhfbw8 = 0;
1134                 break;
1135         default:
1136                 tuner_err("error: bandwidth not supported.\n");
1137         };
1138
1139         /*
1140           Selects between D2633 or D2620 firmware.
1141           It doesn't make sense for ATSC, since it should be D2633 on all cases
1142          */
1143         if (fe->ops.info.type != FE_ATSC) {
1144                 switch (priv->ctrl.type) {
1145                 case XC2028_D2633:
1146                         type |= D2633;
1147                         break;
1148                 case XC2028_D2620:
1149                         type |= D2620;
1150                         break;
1151                 case XC2028_AUTO:
1152                 default:
1153                         /* Zarlink seems to need D2633 */
1154                         if (priv->ctrl.demod == XC3028_FE_ZARLINK456)
1155                                 type |= D2633;
1156                         else
1157                                 type |= D2620;
1158                 }
1159         }
1160
1161         /* All S-code tables need a 200kHz shift */
1162         if (priv->ctrl.demod) {
1163                 demod = priv->ctrl.demod;
1164
1165                 /*
1166                  * Newer firmwares require a 200 kHz offset only for ATSC
1167                  */
1168                 if (type == ATSC || priv->firm_version < 0x0302)
1169                         demod += 200;
1170                 /*
1171                  * The DTV7 S-code table needs a 700 kHz shift.
1172                  *
1173                  * DTV7 is only used in Australia.  Germany or Italy may also
1174                  * use this firmware after initialization, but a tune to a UHF
1175                  * channel should then cause DTV78 to be used.
1176                  *
1177                  * Unfortunately, on real-field tests, the s-code offset
1178                  * didn't work as expected, as reported by
1179                  * Robert Lowery <rglowery@exemail.com.au>
1180                  */
1181         }
1182
1183         return generic_set_freq(fe, p->frequency,
1184                                 V4L2_TUNER_DIGITAL_TV, type, 0, demod);
1185 }
1186
1187 static int xc2028_sleep(struct dvb_frontend *fe)
1188 {
1189         struct xc2028_data *priv = fe->tuner_priv;
1190         int rc = 0;
1191
1192         /* Avoid firmware reload on slow devices or if PM disabled */
1193         if (no_poweroff || priv->ctrl.disable_power_mgmt)
1194                 return 0;
1195
1196         tuner_dbg("Putting xc2028/3028 into poweroff mode.\n");
1197         if (debug > 1) {
1198                 tuner_dbg("Printing sleep stack trace:\n");
1199                 dump_stack();
1200         }
1201
1202         mutex_lock(&priv->lock);
1203
1204         if (priv->firm_version < 0x0202)
1205                 rc = send_seq(priv, {0x00, 0x08, 0x00, 0x00});
1206         else
1207                 rc = send_seq(priv, {0x80, 0x08, 0x00, 0x00});
1208
1209         priv->cur_fw.type = 0;  /* need firmware reload */
1210
1211         mutex_unlock(&priv->lock);
1212
1213         return rc;
1214 }
1215
1216 static int xc2028_dvb_release(struct dvb_frontend *fe)
1217 {
1218         struct xc2028_data *priv = fe->tuner_priv;
1219
1220         tuner_dbg("%s called\n", __func__);
1221
1222         mutex_lock(&xc2028_list_mutex);
1223
1224         /* only perform final cleanup if this is the last instance */
1225         if (hybrid_tuner_report_instance_count(priv) == 1) {
1226                 kfree(priv->ctrl.fname);
1227                 free_firmware(priv);
1228         }
1229
1230         if (priv)
1231                 hybrid_tuner_release_state(priv);
1232
1233         mutex_unlock(&xc2028_list_mutex);
1234
1235         fe->tuner_priv = NULL;
1236
1237         return 0;
1238 }
1239
1240 static int xc2028_get_frequency(struct dvb_frontend *fe, u32 *frequency)
1241 {
1242         struct xc2028_data *priv = fe->tuner_priv;
1243
1244         tuner_dbg("%s called\n", __func__);
1245
1246         *frequency = priv->frequency;
1247
1248         return 0;
1249 }
1250
1251 static int xc2028_set_config(struct dvb_frontend *fe, void *priv_cfg)
1252 {
1253         struct xc2028_data *priv = fe->tuner_priv;
1254         struct xc2028_ctrl *p    = priv_cfg;
1255         int                 rc   = 0;
1256
1257         tuner_dbg("%s called\n", __func__);
1258
1259         mutex_lock(&priv->lock);
1260
1261         memcpy(&priv->ctrl, p, sizeof(priv->ctrl));
1262         if (priv->ctrl.max_len < 9)
1263                 priv->ctrl.max_len = 13;
1264
1265         if (p->fname) {
1266                 if (priv->ctrl.fname && strcmp(p->fname, priv->ctrl.fname)) {
1267                         kfree(priv->ctrl.fname);
1268                         free_firmware(priv);
1269                 }
1270
1271                 priv->ctrl.fname = kstrdup(p->fname, GFP_KERNEL);
1272                 if (priv->ctrl.fname == NULL)
1273                         rc = -ENOMEM;
1274         }
1275
1276         mutex_unlock(&priv->lock);
1277
1278         return rc;
1279 }
1280
1281 static const struct dvb_tuner_ops xc2028_dvb_tuner_ops = {
1282         .info = {
1283                  .name = "Xceive XC3028",
1284                  .frequency_min = 42000000,
1285                  .frequency_max = 864000000,
1286                  .frequency_step = 50000,
1287                  },
1288
1289         .set_config        = xc2028_set_config,
1290         .set_analog_params = xc2028_set_analog_freq,
1291         .release           = xc2028_dvb_release,
1292         .get_frequency     = xc2028_get_frequency,
1293         .get_rf_strength   = xc2028_signal,
1294         .set_params        = xc2028_set_params,
1295         .sleep             = xc2028_sleep,
1296 };
1297
1298 struct dvb_frontend *xc2028_attach(struct dvb_frontend *fe,
1299                                    struct xc2028_config *cfg)
1300 {
1301         struct xc2028_data *priv;
1302         int instance;
1303
1304         if (debug)
1305                 printk(KERN_DEBUG "xc2028: Xcv2028/3028 init called!\n");
1306
1307         if (NULL == cfg)
1308                 return NULL;
1309
1310         if (!fe) {
1311                 printk(KERN_ERR "xc2028: No frontend!\n");
1312                 return NULL;
1313         }
1314
1315         mutex_lock(&xc2028_list_mutex);
1316
1317         instance = hybrid_tuner_request_state(struct xc2028_data, priv,
1318                                               hybrid_tuner_instance_list,
1319                                               cfg->i2c_adap, cfg->i2c_addr,
1320                                               "xc2028");
1321         switch (instance) {
1322         case 0:
1323                 /* memory allocation failure */
1324                 goto fail;
1325                 break;
1326         case 1:
1327                 /* new tuner instance */
1328                 priv->ctrl.max_len = 13;
1329
1330                 mutex_init(&priv->lock);
1331
1332                 fe->tuner_priv = priv;
1333                 break;
1334         case 2:
1335                 /* existing tuner instance */
1336                 fe->tuner_priv = priv;
1337                 break;
1338         }
1339
1340         memcpy(&fe->ops.tuner_ops, &xc2028_dvb_tuner_ops,
1341                sizeof(xc2028_dvb_tuner_ops));
1342
1343         tuner_info("type set to %s\n", "XCeive xc2028/xc3028 tuner");
1344
1345         if (cfg->ctrl)
1346                 xc2028_set_config(fe, cfg->ctrl);
1347
1348         mutex_unlock(&xc2028_list_mutex);
1349
1350         return fe;
1351 fail:
1352         mutex_unlock(&xc2028_list_mutex);
1353
1354         xc2028_dvb_release(fe);
1355         return NULL;
1356 }
1357
1358 EXPORT_SYMBOL(xc2028_attach);
1359
1360 MODULE_DESCRIPTION("Xceive xc2028/xc3028 tuner driver");
1361 MODULE_AUTHOR("Michel Ludwig <michel.ludwig@gmail.com>");
1362 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
1363 MODULE_LICENSE("GPL");