drivers/net/wireless/p54/eeprom.c

   1 /*
   2  * EEPROM parser code for mac80211 Prism54 drivers
   3  *
   4  * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
   5  * Copyright (c) 2007-2009, Christian Lamparter <chunkeey@web.de>
   6  * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
   7  *
   8  * Based on:
   9  * - the islsm (softmac prism54) driver, which is:
  10  *   Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
  11  * - stlc45xx driver
  12  *   Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License version 2 as
  16  * published by the Free Software Foundation.
  17  */
  18
  19 #include <linux/init.h>
  20 #include <linux/firmware.h>
  21 #include <linux/etherdevice.h>
  22 #include <linux/sort.h>
  23 #include <linux/slab.h>
  24
  25 #include <net/mac80211.h>
  26 #include <linux/crc-ccitt.h>
  27
  28 #include "p54.h"
  29 #include "eeprom.h"
  30 #include "lmac.h"
  31
  32 static struct ieee80211_rate p54_bgrates[] = {
  33         { .bitrate = 10, .hw_value = 0, },
  34         { .bitrate = 20, .hw_value = 1, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  35         { .bitrate = 55, .hw_value = 2, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  36         { .bitrate = 110, .hw_value = 3, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  37         { .bitrate = 60, .hw_value = 4, },
  38         { .bitrate = 90, .hw_value = 5, },
  39         { .bitrate = 120, .hw_value = 6, },
  40         { .bitrate = 180, .hw_value = 7, },
  41         { .bitrate = 240, .hw_value = 8, },
  42         { .bitrate = 360, .hw_value = 9, },
  43         { .bitrate = 480, .hw_value = 10, },
  44         { .bitrate = 540, .hw_value = 11, },
  45 };
  46
  47 static struct ieee80211_rate p54_arates[] = {
  48         { .bitrate = 60, .hw_value = 4, },
  49         { .bitrate = 90, .hw_value = 5, },
  50         { .bitrate = 120, .hw_value = 6, },
  51         { .bitrate = 180, .hw_value = 7, },
  52         { .bitrate = 240, .hw_value = 8, },
  53         { .bitrate = 360, .hw_value = 9, },
  54         { .bitrate = 480, .hw_value = 10, },
  55         { .bitrate = 540, .hw_value = 11, },
  56 };
  57
  58 static struct p54_rssi_db_entry p54_rssi_default = {
  59         /*
  60          * The defaults are taken from usb-logs of the
  61          * vendor driver. So, they should be safe to
  62          * use in case we can't get a match from the
  63          * rssi <-> dBm conversion database.
  64          */
  65         .mul = 130,
  66         .add = -398,
  67 };
  68
  69 #define CHAN_HAS_CAL            BIT(0)
  70 #define CHAN_HAS_LIMIT          BIT(1)
  71 #define CHAN_HAS_CURVE          BIT(2)
  72 #define CHAN_HAS_ALL            (CHAN_HAS_CAL | CHAN_HAS_LIMIT | CHAN_HAS_CURVE)
  73
  74 struct p54_channel_entry {
  75         u16 freq;
  76         u16 data;
  77         int index;
  78         enum ieee80211_band band;
  79 };
  80
  81 struct p54_channel_list {
  82         struct p54_channel_entry *channels;
  83         size_t entries;
  84         size_t max_entries;
  85         size_t band_channel_num[IEEE80211_NUM_BANDS];
  86 };
  87
  88 static int p54_get_band_from_freq(u16 freq)
  89 {
  90         /* FIXME: sync these values with the 802.11 spec */
  91
  92         if ((freq >= 2412) && (freq <= 2484))
  93                 return IEEE80211_BAND_2GHZ;
  94
  95         if ((freq >= 4920) && (freq <= 5825))
  96                 return IEEE80211_BAND_5GHZ;
  97
  98         return -1;
  99 }
 100
 101 static int same_band(u16 freq, u16 freq2)
 102 {
 103         return p54_get_band_from_freq(freq) == p54_get_band_from_freq(freq2);
 104 }
 105
 106 static int p54_compare_channels(const void *_a,
 107                                 const void *_b)
 108 {
 109         const struct p54_channel_entry *a = _a;
 110         const struct p54_channel_entry *b = _b;
 111
 112         return a->freq - b->freq;
 113 }
 114
 115 static int p54_compare_rssichan(const void *_a,
 116                                 const void *_b)
 117 {
 118         const struct p54_rssi_db_entry *a = _a;
 119         const struct p54_rssi_db_entry *b = _b;
 120
 121         return a->freq - b->freq;
 122 }
 123
 124 static int p54_fill_band_bitrates(struct ieee80211_hw *dev,
 125                                   struct ieee80211_supported_band *band_entry,
 126                                   enum ieee80211_band band)
 127 {
 128         /* TODO: generate rate array dynamically */
 129
 130         switch (band) {
 131         case IEEE80211_BAND_2GHZ:
 132                 band_entry->bitrates = p54_bgrates;
 133                 band_entry->n_bitrates = ARRAY_SIZE(p54_bgrates);
 134                 break;
 135         case IEEE80211_BAND_5GHZ:
 136                 band_entry->bitrates = p54_arates;
 137                 band_entry->n_bitrates = ARRAY_SIZE(p54_arates);
 138                 break;
 139         default:
 140                 return -EINVAL;
 141         }
 142
 143         return 0;
 144 }
 145
 146 static int p54_generate_band(struct ieee80211_hw *dev,
 147                              struct p54_channel_list *list,
 148                              enum ieee80211_band band)
 149 {
 150         struct p54_common *priv = dev->priv;
 151         struct ieee80211_supported_band *tmp, *old;
 152         unsigned int i, j;
 153         int ret = -ENOMEM;
 154
 155         if ((!list->entries) || (!list->band_channel_num[band]))
 156                 return -EINVAL;
 157
 158         tmp = kzalloc(sizeof(*tmp), GFP_KERNEL);
 159         if (!tmp)
 160                 goto err_out;
 161
 162         tmp->channels = kzalloc(sizeof(struct ieee80211_channel) *
 163                                 list->band_channel_num[band], GFP_KERNEL);
 164         if (!tmp->channels)
 165                 goto err_out;
 166
 167         ret = p54_fill_band_bitrates(dev, tmp, band);
 168         if (ret)
 169                 goto err_out;
 170
 171         for (i = 0, j = 0; (j < list->band_channel_num[band]) &&
 172                            (i < list->entries); i++) {
 173                 struct p54_channel_entry *chan = &list->channels[i];
 174
 175                 if (chan->band != band)
 176                         continue;
 177
 178                 if (chan->data != CHAN_HAS_ALL) {
 179                         wiphy_err(dev->wiphy, "%s%s%s is/are missing for "
 180                                   "channel:%d [%d MHz].\n",
 181                                   (chan->data & CHAN_HAS_CAL ? "" :
 182                                    " [iqauto calibration data]"),
 183                                   (chan->data & CHAN_HAS_LIMIT ? "" :
 184                                    " [output power limits]"),
 185                                   (chan->data & CHAN_HAS_CURVE ? "" :
 186                                    " [curve data]"),
 187                                   chan->index, chan->freq);
 188                         continue;
 189                 }
 190
 191                 tmp->channels[j].band = chan->band;
 192                 tmp->channels[j].center_freq = chan->freq;
 193                 j++;
 194         }
 195
 196         if (j == 0) {
 197                 wiphy_err(dev->wiphy, "Disabling totally damaged %d GHz band\n",
 198                           (band == IEEE80211_BAND_2GHZ) ? 2 : 5);
 199
 200                 ret = -ENODATA;
 201                 goto err_out;
 202         }
 203
 204         tmp->n_channels = j;
 205         old = priv->band_table[band];
 206         priv->band_table[band] = tmp;
 207         if (old) {
 208                 kfree(old->channels);
 209                 kfree(old);
 210         }
 211
 212         return 0;
 213
 214 err_out:
 215         if (tmp) {
 216                 kfree(tmp->channels);
 217                 kfree(tmp);
 218         }
 219
 220         return ret;
 221 }
 222
 223 static void p54_update_channel_param(struct p54_channel_list *list,
 224                                      u16 freq, u16 data)
 225 {
 226         int band, i;
 227
 228         /*
 229          * usually all lists in the eeprom are mostly sorted.
 230          * so it's very likely that the entry we are looking for
 231          * is right at the end of the list
 232          */
 233         for (i = list->entries; i >= 0; i--) {
 234                 if (freq == list->channels[i].freq) {
 235                         list->channels[i].data |= data;
 236                         break;
 237                 }
 238         }
 239
 240         if ((i < 0) && (list->entries < list->max_entries)) {
 241                 /* entry does not exist yet. Initialize a new one. */
 242                 band = p54_get_band_from_freq(freq);
 243
 244                 /*
 245                  * filter out frequencies which don't belong into
 246                  * any supported band.
 247                  */
 248                 if (band < 0)
 249                         return ;
 250
 251                 i = list->entries++;
 252                 list->band_channel_num[band]++;
 253
 254                 list->channels[i].freq = freq;
 255                 list->channels[i].data = data;
 256                 list->channels[i].band = band;
 257                 list->channels[i].index = ieee80211_frequency_to_channel(freq);
 258                 /* TODO: parse output_limit and fill max_power */
 259         }
 260 }
 261
 262 static int p54_generate_channel_lists(struct ieee80211_hw *dev)
 263 {
 264         struct p54_common *priv = dev->priv;
 265         struct p54_channel_list *list;
 266         unsigned int i, j, max_channel_num;
 267         int ret = 0;
 268         u16 freq;
 269
 270         if ((priv->iq_autocal_len != priv->curve_data->entries) ||
 271             (priv->iq_autocal_len != priv->output_limit->entries))
 272                 wiphy_err(dev->wiphy,
 273                           "Unsupported or damaged EEPROM detected. "
 274                           "You may not be able to use all channels.\n");
 275
 276         max_channel_num = max_t(unsigned int, priv->output_limit->entries,
 277                                 priv->iq_autocal_len);
 278         max_channel_num = max_t(unsigned int, max_channel_num,
 279                                 priv->curve_data->entries);
 280
 281         list = kzalloc(sizeof(*list), GFP_KERNEL);
 282         if (!list) {
 283                 ret = -ENOMEM;
 284                 goto free;
 285         }
 286
 287         list->max_entries = max_channel_num;
 288         list->channels = kzalloc(sizeof(struct p54_channel_entry) *
 289                                  max_channel_num, GFP_KERNEL);
 290         if (!list->channels) {
 291                 ret = -ENOMEM;
 292                 goto free;
 293         }
 294
 295         for (i = 0; i < max_channel_num; i++) {
 296                 if (i < priv->iq_autocal_len) {
 297                         freq = le16_to_cpu(priv->iq_autocal[i].freq);
 298                         p54_update_channel_param(list, freq, CHAN_HAS_CAL);
 299                 }
 300
 301                 if (i < priv->output_limit->entries) {
 302                         freq = le16_to_cpup((__le16 *) (i *
 303                                             priv->output_limit->entry_size +
 304                                             priv->output_limit->offset +
 305                                             priv->output_limit->data));
 306
 307                         p54_update_channel_param(list, freq, CHAN_HAS_LIMIT);
 308                 }
 309
 310                 if (i < priv->curve_data->entries) {
 311                         freq = le16_to_cpup((__le16 *) (i *
 312                                             priv->curve_data->entry_size +
 313                                             priv->curve_data->offset +
 314                                             priv->curve_data->data));
 315
 316                         p54_update_channel_param(list, freq, CHAN_HAS_CURVE);
 317                 }
 318         }
 319
 320         /* sort the channel list by frequency */
 321         sort(list->channels, list->entries, sizeof(struct p54_channel_entry),
 322              p54_compare_channels, NULL);
 323
 324         for (i = 0, j = 0; i < IEEE80211_NUM_BANDS; i++) {
 325                 if (p54_generate_band(dev, list, i) == 0)
 326                         j++;
 327         }
 328         if (j == 0) {
 329                 /* no useable band available. */
 330                 ret = -EINVAL;
 331         }
 332
 333 free:
 334         if (list) {
 335                 kfree(list->channels);
 336                 kfree(list);
 337         }
 338
 339         return ret;
 340 }
 341
 342 static int p54_convert_rev0(struct ieee80211_hw *dev,
 343                             struct pda_pa_curve_data *curve_data)
 344 {
 345         struct p54_common *priv = dev->priv;
 346         struct p54_pa_curve_data_sample *dst;
 347         struct pda_pa_curve_data_sample_rev0 *src;
 348         size_t cd_len = sizeof(*curve_data) +
 349                 (curve_data->points_per_channel*sizeof(*dst) + 2) *
 350                  curve_data->channels;
 351         unsigned int i, j;
 352         void *source, *target;
 353
 354         priv->curve_data = kmalloc(sizeof(*priv->curve_data) + cd_len,
 355                                    GFP_KERNEL);
 356         if (!priv->curve_data)
 357                 return -ENOMEM;
 358
 359         priv->curve_data->entries = curve_data->channels;
 360         priv->curve_data->entry_size = sizeof(__le16) +
 361                 sizeof(*dst) * curve_data->points_per_channel;
 362         priv->curve_data->offset = offsetof(struct pda_pa_curve_data, data);
 363         priv->curve_data->len = cd_len;
 364         memcpy(priv->curve_data->data, curve_data, sizeof(*curve_data));
 365         source = curve_data->data;
 366         target = ((struct pda_pa_curve_data *) priv->curve_data->data)->data;
 367         for (i = 0; i < curve_data->channels; i++) {
 368                 __le16 *freq = source;
 369                 source += sizeof(__le16);
 370                 *((__le16 *)target) = *freq;
 371                 target += sizeof(__le16);
 372                 for (j = 0; j < curve_data->points_per_channel; j++) {
 373                         dst = target;
 374                         src = source;
 375
 376                         dst->rf_power = src->rf_power;
 377                         dst->pa_detector = src->pa_detector;
 378                         dst->data_64qam = src->pcv;
 379                         /* "invent" the points for the other modulations */
 380 #define SUB(x, y) (u8)(((x) - (y)) > (x) ? 0 : (x) - (y))
 381                         dst->data_16qam = SUB(src->pcv, 12);
 382                         dst->data_qpsk = SUB(dst->data_16qam, 12);
 383                         dst->data_bpsk = SUB(dst->data_qpsk, 12);
 384                         dst->data_barker = SUB(dst->data_bpsk, 14);
 385 #undef SUB
 386                         target += sizeof(*dst);
 387                         source += sizeof(*src);
 388                 }
 389         }
 390
 391         return 0;
 392 }
 393
 394 static int p54_convert_rev1(struct ieee80211_hw *dev,
 395                             struct pda_pa_curve_data *curve_data)
 396 {
 397         struct p54_common *priv = dev->priv;
 398         struct p54_pa_curve_data_sample *dst;
 399         struct pda_pa_curve_data_sample_rev1 *src;
 400         size_t cd_len = sizeof(*curve_data) +
 401                 (curve_data->points_per_channel*sizeof(*dst) + 2) *
 402                  curve_data->channels;
 403         unsigned int i, j;
 404         void *source, *target;
 405
 406         priv->curve_data = kzalloc(cd_len + sizeof(*priv->curve_data),
 407                                    GFP_KERNEL);
 408         if (!priv->curve_data)
 409                 return -ENOMEM;
 410
 411         priv->curve_data->entries = curve_data->channels;
 412         priv->curve_data->entry_size = sizeof(__le16) +
 413                 sizeof(*dst) * curve_data->points_per_channel;
 414         priv->curve_data->offset = offsetof(struct pda_pa_curve_data, data);
 415         priv->curve_data->len = cd_len;
 416         memcpy(priv->curve_data->data, curve_data, sizeof(*curve_data));
 417         source = curve_data->data;
 418         target = ((struct pda_pa_curve_data *) priv->curve_data->data)->data;
 419         for (i = 0; i < curve_data->channels; i++) {
 420                 __le16 *freq = source;
 421                 source += sizeof(__le16);
 422                 *((__le16 *)target) = *freq;
 423                 target += sizeof(__le16);
 424                 for (j = 0; j < curve_data->points_per_channel; j++) {
 425                         memcpy(target, source, sizeof(*src));
 426
 427                         target += sizeof(*dst);
 428                         source += sizeof(*src);
 429                 }
 430                 source++;
 431         }
 432
 433         return 0;
 434 }
 435
 436 static const char *p54_rf_chips[] = { "INVALID-0", "Duette3", "Duette2",
 437         "Frisbee", "Xbow", "Longbow", "INVALID-6", "INVALID-7" };
 438
 439 static int p54_parse_rssical(struct ieee80211_hw *dev,
 440                              u8 *data, int len, u16 type)
 441 {
 442         struct p54_common *priv = dev->priv;
 443         struct p54_rssi_db_entry *entry;
 444         size_t db_len, entries;
 445         int offset = 0, i;
 446
 447         if (type != PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED) {
 448                 entries = (type == PDR_RSSI_LINEAR_APPROXIMATION) ? 1 : 2;
 449                 if (len != sizeof(struct pda_rssi_cal_entry) * entries) {
 450                         wiphy_err(dev->wiphy, "rssical size mismatch.\n");
 451                         goto err_data;
 452                 }
 453         } else {
 454                 /*
 455                  * Some devices (Dell 1450 USB, Xbow 5GHz card, etc...)
 456                  * have an empty two byte header.
 457                  */
 458                 if (*((__le16 *)&data[offset]) == cpu_to_le16(0))
 459                         offset += 2;
 460
 461                 entries = (len - offset) /
 462                         sizeof(struct pda_rssi_cal_ext_entry);
 463
 464                 if ((len - offset) % sizeof(struct pda_rssi_cal_ext_entry) ||
 465                     entries <= 0) {
 466                         wiphy_err(dev->wiphy, "invalid rssi database.\n");
 467                         goto err_data;
 468                 }
 469         }
 470
 471         db_len = sizeof(*entry) * entries;
 472         priv->rssi_db = kzalloc(db_len + sizeof(*priv->rssi_db), GFP_KERNEL);
 473         if (!priv->rssi_db)
 474                 return -ENOMEM;
 475
 476         priv->rssi_db->offset = 0;
 477         priv->rssi_db->entries = entries;
 478         priv->rssi_db->entry_size = sizeof(*entry);
 479         priv->rssi_db->len = db_len;
 480
 481         entry = (void *)((unsigned long)priv->rssi_db->data + priv->rssi_db->offset);
 482         if (type == PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED) {
 483                 struct pda_rssi_cal_ext_entry *cal = (void *) &data[offset];
 484
 485                 for (i = 0; i < entries; i++) {
 486                         entry[i].freq = le16_to_cpu(cal[i].freq);
 487                         entry[i].mul = (s16) le16_to_cpu(cal[i].mul);
 488                         entry[i].add = (s16) le16_to_cpu(cal[i].add);
 489                 }
 490         } else {
 491                 struct pda_rssi_cal_entry *cal = (void *) &data[offset];
 492
 493                 for (i = 0; i < entries; i++) {
 494                         u16 freq;
 495                         switch (i) {
 496                         case IEEE80211_BAND_2GHZ:
 497                                 freq = 2437;
 498                                 break;
 499                         case IEEE80211_BAND_5GHZ:
 500                                 freq = 5240;
 501                                 break;
 502                         }
 503
 504                         entry[i].freq = freq;
 505                         entry[i].mul = (s16) le16_to_cpu(cal[i].mul);
 506                         entry[i].add = (s16) le16_to_cpu(cal[i].add);
 507                 }
 508         }
 509
 510         /* sort the list by channel frequency */
 511         sort(entry, entries, sizeof(*entry), p54_compare_rssichan, NULL);
 512         return 0;
 513
 514 err_data:
 515         wiphy_err(dev->wiphy,
 516                   "rssi calibration data packing type:(%x) len:%d.\n",
 517                   type, len);
 518
 519         print_hex_dump_bytes("rssical:", DUMP_PREFIX_NONE, data, len);
 520
 521         wiphy_err(dev->wiphy, "please report this issue.\n");
 522         return -EINVAL;
 523 }
 524
 525 struct p54_rssi_db_entry *p54_rssi_find(struct p54_common *priv, const u16 freq)
 526 {
 527         struct p54_rssi_db_entry *entry;
 528         int i, found = -1;
 529
 530         if (!priv->rssi_db)
 531                 return &p54_rssi_default;
 532
 533         entry = (void *)(priv->rssi_db->data + priv->rssi_db->offset);
 534         for (i = 0; i < priv->rssi_db->entries; i++) {
 535                 if (!same_band(freq, entry[i].freq))
 536                         continue;
 537
 538                 if (found == -1) {
 539                         found = i;
 540                         continue;
 541                 }
 542
 543                 /* nearest match */
 544                 if (abs(freq - entry[i].freq) <
 545                     abs(freq - entry[found].freq)) {
 546                         found = i;
 547                         continue;
 548                 } else {
 549                         break;
 550                 }
 551         }
 552
 553         return found < 0 ? &p54_rssi_default : &entry[found];
 554 }
 555
 556 static void p54_parse_default_country(struct ieee80211_hw *dev,
 557                                       void *data, int len)
 558 {
 559         struct pda_country *country;
 560
 561         if (len != sizeof(*country)) {
 562                 wiphy_err(dev->wiphy,
 563                           "found possible invalid default country eeprom entry. (entry size: %d)\n",
 564                           len);
 565
 566                 print_hex_dump_bytes("country:", DUMP_PREFIX_NONE,
 567                                      data, len);
 568
 569                 wiphy_err(dev->wiphy, "please report this issue.\n");
 570                 return;
 571         }
 572
 573         country = (struct pda_country *) data;
 574         if (country->flags == PDR_COUNTRY_CERT_CODE_PSEUDO)
 575                 regulatory_hint(dev->wiphy, country->alpha2);
 576         else {
 577                 /* TODO:
 578                  * write a shared/common function that converts
 579                  * "Regulatory domain codes" (802.11-2007 14.8.2.2)
 580                  * into ISO/IEC 3166-1 alpha2 for regulatory_hint.
 581                  */
 582         }
 583 }
 584
 585 static int p54_convert_output_limits(struct ieee80211_hw *dev,
 586                                      u8 *data, size_t len)
 587 {
 588         struct p54_common *priv = dev->priv;
 589
 590         if (len < 2)
 591                 return -EINVAL;
 592
 593         if (data[0] != 0) {
 594                 wiphy_err(dev->wiphy, "unknown output power db revision:%x\n",
 595                           data[0]);
 596                 return -EINVAL;
 597         }
 598
 599         if (2 + data[1] * sizeof(struct pda_channel_output_limit) > len)
 600                 return -EINVAL;
 601
 602         priv->output_limit = kmalloc(data[1] *
 603                 sizeof(struct pda_channel_output_limit) +
 604                 sizeof(*priv->output_limit), GFP_KERNEL);
 605
 606         if (!priv->output_limit)
 607                 return -ENOMEM;
 608
 609         priv->output_limit->offset = 0;
 610         priv->output_limit->entries = data[1];
 611         priv->output_limit->entry_size =
 612                 sizeof(struct pda_channel_output_limit);
 613         priv->output_limit->len = priv->output_limit->entry_size *
 614                                   priv->output_limit->entries +
 615                                   priv->output_limit->offset;
 616
 617         memcpy(priv->output_limit->data, &data[2],
 618                data[1] * sizeof(struct pda_channel_output_limit));
 619
 620         return 0;
 621 }
 622
 623 static struct p54_cal_database *p54_convert_db(struct pda_custom_wrapper *src,
 624                                                size_t total_len)
 625 {
 626         struct p54_cal_database *dst;
 627         size_t payload_len, entries, entry_size, offset;
 628
 629         payload_len = le16_to_cpu(src->len);
 630         entries = le16_to_cpu(src->entries);
 631         entry_size = le16_to_cpu(src->entry_size);
 632         offset = le16_to_cpu(src->offset);
 633         if (((entries * entry_size + offset) != payload_len) ||
 634              (payload_len + sizeof(*src) != total_len))
 635                 return NULL;
 636
 637         dst = kmalloc(sizeof(*dst) + payload_len, GFP_KERNEL);
 638         if (!dst)
 639                 return NULL;
 640
 641         dst->entries = entries;
 642         dst->entry_size = entry_size;
 643         dst->offset = offset;
 644         dst->len = payload_len;
 645
 646         memcpy(dst->data, src->data, payload_len);
 647         return dst;
 648 }
 649
 650 int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
 651 {
 652         struct p54_common *priv = dev->priv;
 653         struct eeprom_pda_wrap *wrap;
 654         struct pda_entry *entry;
 655         unsigned int data_len, entry_len;
 656         void *tmp;
 657         int err;
 658         u8 *end = (u8 *)eeprom + len;
 659         u16 synth = 0;
 660         u16 crc16 = ~0;
 661
 662         wrap = (struct eeprom_pda_wrap *) eeprom;
 663         entry = (void *)wrap->data + le16_to_cpu(wrap->len);
 664
 665         /* verify that at least the entry length/code fits */
 666         while ((u8 *)entry <= end - sizeof(*entry)) {
 667                 entry_len = le16_to_cpu(entry->len);
 668                 data_len = ((entry_len - 1) << 1);
 669
 670                 /* abort if entry exceeds whole structure */
 671                 if ((u8 *)entry + sizeof(*entry) + data_len > end)
 672                         break;
 673
 674                 switch (le16_to_cpu(entry->code)) {
 675                 case PDR_MAC_ADDRESS:
 676                         if (data_len != ETH_ALEN)
 677                                 break;
 678                         SET_IEEE80211_PERM_ADDR(dev, entry->data);
 679                         break;
 680                 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS:
 681                         if (priv->output_limit)
 682                                 break;
 683                         err = p54_convert_output_limits(dev, entry->data,
 684                                                         data_len);
 685                         if (err)
 686                                 goto err;
 687                         break;
 688                 case PDR_PRISM_PA_CAL_CURVE_DATA: {
 689                         struct pda_pa_curve_data *curve_data =
 690                                 (struct pda_pa_curve_data *)entry->data;
 691                         if (data_len < sizeof(*curve_data)) {
 692                                 err = -EINVAL;
 693                                 goto err;
 694                         }
 695
 696                         switch (curve_data->cal_method_rev) {
 697                         case 0:
 698                                 err = p54_convert_rev0(dev, curve_data);
 699                                 break;
 700                         case 1:
 701                                 err = p54_convert_rev1(dev, curve_data);
 702                                 break;
 703                         default:
 704                                 wiphy_err(dev->wiphy,
 705                                           "unknown curve data revision %d\n",
 706                                           curve_data->cal_method_rev);
 707                                 err = -ENODEV;
 708                                 break;
 709                         }
 710                         if (err)
 711                                 goto err;
 712                         }
 713                         break;
 714                 case PDR_PRISM_ZIF_TX_IQ_CALIBRATION:
 715                         priv->iq_autocal = kmemdup(entry->data, data_len,
 716                                                    GFP_KERNEL);
 717                         if (!priv->iq_autocal) {
 718                                 err = -ENOMEM;
 719                                 goto err;
 720                         }
 721
 722                         priv->iq_autocal_len = data_len / sizeof(struct pda_iq_autocal_entry);
 723                         break;
 724                 case PDR_DEFAULT_COUNTRY:
 725                         p54_parse_default_country(dev, entry->data, data_len);
 726                         break;
 727                 case PDR_INTERFACE_LIST:
 728                         tmp = entry->data;
 729                         while ((u8 *)tmp < entry->data + data_len) {
 730                                 struct exp_if *exp_if = tmp;
 731                                 if (exp_if->if_id == cpu_to_le16(IF_ID_ISL39000))
 732                                         synth = le16_to_cpu(exp_if->variant);
 733                                 tmp += sizeof(*exp_if);
 734                         }
 735                         break;
 736                 case PDR_HARDWARE_PLATFORM_COMPONENT_ID:
 737                         if (data_len < 2)
 738                                 break;
 739                         priv->version = *(u8 *)(entry->data + 1);
 740                         break;
 741                 case PDR_RSSI_LINEAR_APPROXIMATION:
 742                 case PDR_RSSI_LINEAR_APPROXIMATION_DUAL_BAND:
 743                 case PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED:
 744                         err = p54_parse_rssical(dev, entry->data, data_len,
 745                                                 le16_to_cpu(entry->code));
 746                         if (err)
 747                                 goto err;
 748                         break;
 749                 case PDR_RSSI_LINEAR_APPROXIMATION_CUSTOMV2: {
 750                         struct pda_custom_wrapper *pda = (void *) entry->data;
 751                         __le16 *src;
 752                         u16 *dst;
 753                         int i;
 754
 755                         if (priv->rssi_db || data_len < sizeof(*pda))
 756                                 break;
 757
 758                         priv->rssi_db = p54_convert_db(pda, data_len);
 759                         if (!priv->rssi_db)
 760                                 break;
 761
 762                         src = (void *) priv->rssi_db->data;
 763                         dst = (void *) priv->rssi_db->data;
 764
 765                         for (i = 0; i < priv->rssi_db->entries; i++)
 766                                 *(dst++) = (s16) le16_to_cpu(*(src++));
 767
 768                         }
 769                         break;
 770                 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS_CUSTOM: {
 771                         struct pda_custom_wrapper *pda = (void *) entry->data;
 772                         if (priv->output_limit || data_len < sizeof(*pda))
 773                                 break;
 774                         priv->output_limit = p54_convert_db(pda, data_len);
 775                         }
 776                         break;
 777                 case PDR_PRISM_PA_CAL_CURVE_DATA_CUSTOM: {
 778                         struct pda_custom_wrapper *pda = (void *) entry->data;
 779                         if (priv->curve_data || data_len < sizeof(*pda))
 780                                 break;
 781                         priv->curve_data = p54_convert_db(pda, data_len);
 782                         }
 783                         break;
 784                 case PDR_END:
 785                         crc16 = ~crc_ccitt(crc16, (u8 *) entry, sizeof(*entry));
 786                         if (crc16 != le16_to_cpup((__le16 *)entry->data)) {
 787                                 wiphy_err(dev->wiphy, "eeprom failed checksum "
 788                                          "test!\n");
 789                                 err = -ENOMSG;
 790                                 goto err;
 791                         } else {
 792                                 goto good_eeprom;
 793                         }
 794                         break;
 795                 default:
 796                         break;
 797                 }
 798
 799                 crc16 = crc_ccitt(crc16, (u8 *)entry, (entry_len + 1) * 2);
 800                 entry = (void *)entry + (entry_len + 1) * 2;
 801         }
 802
 803         wiphy_err(dev->wiphy, "unexpected end of eeprom data.\n");
 804         err = -ENODATA;
 805         goto err;
 806
 807 good_eeprom:
 808         if (!synth || !priv->iq_autocal || !priv->output_limit ||
 809             !priv->curve_data) {
 810                 wiphy_err(dev->wiphy,
 811                           "not all required entries found in eeprom!\n");
 812                 err = -EINVAL;
 813                 goto err;
 814         }
 815
 816         err = p54_generate_channel_lists(dev);
 817         if (err)
 818                 goto err;
 819
 820         priv->rxhw = synth & PDR_SYNTH_FRONTEND_MASK;
 821         if (priv->rxhw == PDR_SYNTH_FRONTEND_XBOW)
 822                 p54_init_xbow_synth(priv);
 823         if (!(synth & PDR_SYNTH_24_GHZ_DISABLED))
 824                 dev->wiphy->bands[IEEE80211_BAND_2GHZ] =
 825                         priv->band_table[IEEE80211_BAND_2GHZ];
 826         if (!(synth & PDR_SYNTH_5_GHZ_DISABLED))
 827                 dev->wiphy->bands[IEEE80211_BAND_5GHZ] =
 828                         priv->band_table[IEEE80211_BAND_5GHZ];
 829         if ((synth & PDR_SYNTH_RX_DIV_MASK) == PDR_SYNTH_RX_DIV_SUPPORTED)
 830                 priv->rx_diversity_mask = 3;
 831         if ((synth & PDR_SYNTH_TX_DIV_MASK) == PDR_SYNTH_TX_DIV_SUPPORTED)
 832                 priv->tx_diversity_mask = 3;
 833
 834         if (!is_valid_ether_addr(dev->wiphy->perm_addr)) {
 835                 u8 perm_addr[ETH_ALEN];
 836
 837                 wiphy_warn(dev->wiphy,
 838                            "Invalid hwaddr! Using randomly generated MAC addr\n");
 839                 random_ether_addr(perm_addr);
 840                 SET_IEEE80211_PERM_ADDR(dev, perm_addr);
 841         }
 842
 843         priv->cur_rssi = &p54_rssi_default;
 844
 845         wiphy_info(dev->wiphy, "hwaddr %pM, MAC:isl38%02x RF:%s\n",
 846                    dev->wiphy->perm_addr, priv->version,
 847                    p54_rf_chips[priv->rxhw]);
 848
 849         return 0;
 850
 851 err:
 852         kfree(priv->iq_autocal);
 853         kfree(priv->output_limit);
 854         kfree(priv->curve_data);
 855         kfree(priv->rssi_db);
 856         priv->iq_autocal = NULL;
 857         priv->output_limit = NULL;
 858         priv->curve_data = NULL;
 859         priv->rssi_db = NULL;
 860
 861         wiphy_err(dev->wiphy, "eeprom parse failed!\n");
 862         return err;
 863 }
 864 EXPORT_SYMBOL_GPL(p54_parse_eeprom);
 865
 866 int p54_read_eeprom(struct ieee80211_hw *dev)
 867 {
 868         struct p54_common *priv = dev->priv;
 869         size_t eeprom_size = 0x2020, offset = 0, blocksize, maxblocksize;
 870         int ret = -ENOMEM;
 871         void *eeprom;
 872
 873         maxblocksize = EEPROM_READBACK_LEN;
 874         if (priv->fw_var >= 0x509)
 875                 maxblocksize -= 0xc;
 876         else
 877                 maxblocksize -= 0x4;
 878
 879         eeprom = kzalloc(eeprom_size, GFP_KERNEL);
 880         if (unlikely(!eeprom))
 881                 goto free;
 882
 883         while (eeprom_size) {
 884                 blocksize = min(eeprom_size, maxblocksize);
 885                 ret = p54_download_eeprom(priv, (void *) (eeprom + offset),
 886                                           offset, blocksize);
 887                 if (unlikely(ret))
 888                         goto free;
 889
 890                 offset += blocksize;
 891                 eeprom_size -= blocksize;
 892         }
 893
 894         ret = p54_parse_eeprom(dev, eeprom, offset);
 895 free:
 896         kfree(eeprom);
 897         return ret;
 898 }
 899 EXPORT_SYMBOL_GPL(p54_read_eeprom);