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                              unsigned int *chan_num,
 149                              enum ieee80211_band band)
 150 {
 151         struct p54_common *priv = dev->priv;
 152         struct ieee80211_supported_band *tmp, *old;
 153         unsigned int i, j;
 154         int ret = -ENOMEM;
 155
 156         if ((!list->entries) || (!list->band_channel_num[band]))
 157                 return -EINVAL;
 158
 159         tmp = kzalloc(sizeof(*tmp), GFP_KERNEL);
 160         if (!tmp)
 161                 goto err_out;
 162
 163         tmp->channels = kzalloc(sizeof(struct ieee80211_channel) *
 164                                 list->band_channel_num[band], GFP_KERNEL);
 165         if (!tmp->channels)
 166                 goto err_out;
 167
 168         ret = p54_fill_band_bitrates(dev, tmp, band);
 169         if (ret)
 170                 goto err_out;
 171
 172         for (i = 0, j = 0; (j < list->band_channel_num[band]) &&
 173                            (i < list->entries); i++) {
 174                 struct p54_channel_entry *chan = &list->channels[i];
 175
 176                 if (chan->band != band)
 177                         continue;
 178
 179                 if (chan->data != CHAN_HAS_ALL) {
 180                         wiphy_err(dev->wiphy, "%s%s%s is/are missing for "
 181                                   "channel:%d [%d MHz].\n",
 182                                   (chan->data & CHAN_HAS_CAL ? "" :
 183                                    " [iqauto calibration data]"),
 184                                   (chan->data & CHAN_HAS_LIMIT ? "" :
 185                                    " [output power limits]"),
 186                                   (chan->data & CHAN_HAS_CURVE ? "" :
 187                                    " [curve data]"),
 188                                   chan->index, chan->freq);
 189                         continue;
 190                 }
 191
 192                 tmp->channels[j].band = chan->band;
 193                 tmp->channels[j].center_freq = chan->freq;
 194                 priv->survey[*chan_num].channel = &tmp->channels[j];
 195                 priv->survey[*chan_num].filled = SURVEY_INFO_NOISE_DBM |
 196                         SURVEY_INFO_CHANNEL_TIME |
 197                         SURVEY_INFO_CHANNEL_TIME_BUSY |
 198                         SURVEY_INFO_CHANNEL_TIME_TX;
 199                 tmp->channels[j].hw_value = (*chan_num);
 200                 j++;
 201                 (*chan_num)++;
 202         }
 203
 204         if (j == 0) {
 205                 wiphy_err(dev->wiphy, "Disabling totally damaged %d GHz band\n",
 206                           (band == IEEE80211_BAND_2GHZ) ? 2 : 5);
 207
 208                 ret = -ENODATA;
 209                 goto err_out;
 210         }
 211
 212         tmp->n_channels = j;
 213         old = priv->band_table[band];
 214         priv->band_table[band] = tmp;
 215         if (old) {
 216                 kfree(old->channels);
 217                 kfree(old);
 218         }
 219
 220         return 0;
 221
 222 err_out:
 223         if (tmp) {
 224                 kfree(tmp->channels);
 225                 kfree(tmp);
 226         }
 227
 228         return ret;
 229 }
 230
 231 static void p54_update_channel_param(struct p54_channel_list *list,
 232                                      u16 freq, u16 data)
 233 {
 234         int band, i;
 235
 236         /*
 237          * usually all lists in the eeprom are mostly sorted.
 238          * so it's very likely that the entry we are looking for
 239          * is right at the end of the list
 240          */
 241         for (i = list->entries; i >= 0; i--) {
 242                 if (freq == list->channels[i].freq) {
 243                         list->channels[i].data |= data;
 244                         break;
 245                 }
 246         }
 247
 248         if ((i < 0) && (list->entries < list->max_entries)) {
 249                 /* entry does not exist yet. Initialize a new one. */
 250                 band = p54_get_band_from_freq(freq);
 251
 252                 /*
 253                  * filter out frequencies which don't belong into
 254                  * any supported band.
 255                  */
 256                 if (band < 0)
 257                         return ;
 258
 259                 i = list->entries++;
 260                 list->band_channel_num[band]++;
 261
 262                 list->channels[i].freq = freq;
 263                 list->channels[i].data = data;
 264                 list->channels[i].band = band;
 265                 list->channels[i].index = ieee80211_frequency_to_channel(freq);
 266                 /* TODO: parse output_limit and fill max_power */
 267         }
 268 }
 269
 270 static int p54_generate_channel_lists(struct ieee80211_hw *dev)
 271 {
 272         struct p54_common *priv = dev->priv;
 273         struct p54_channel_list *list;
 274         unsigned int i, j, k, max_channel_num;
 275         int ret = 0;
 276         u16 freq;
 277
 278         if ((priv->iq_autocal_len != priv->curve_data->entries) ||
 279             (priv->iq_autocal_len != priv->output_limit->entries))
 280                 wiphy_err(dev->wiphy,
 281                           "Unsupported or damaged EEPROM detected. "
 282                           "You may not be able to use all channels.\n");
 283
 284         max_channel_num = max_t(unsigned int, priv->output_limit->entries,
 285                                 priv->iq_autocal_len);
 286         max_channel_num = max_t(unsigned int, max_channel_num,
 287                                 priv->curve_data->entries);
 288
 289         list = kzalloc(sizeof(*list), GFP_KERNEL);
 290         if (!list) {
 291                 ret = -ENOMEM;
 292                 goto free;
 293         }
 294         priv->chan_num = max_channel_num;
 295         priv->survey = kzalloc(sizeof(struct survey_info) * max_channel_num,
 296                                GFP_KERNEL);
 297         if (!priv->survey) {
 298                 ret = -ENOMEM;
 299                 goto free;
 300         }
 301
 302         list->max_entries = max_channel_num;
 303         list->channels = kzalloc(sizeof(struct p54_channel_entry) *
 304                                  max_channel_num, GFP_KERNEL);
 305         if (!list->channels) {
 306                 ret = -ENOMEM;
 307                 goto free;
 308         }
 309
 310         for (i = 0; i < max_channel_num; i++) {
 311                 if (i < priv->iq_autocal_len) {
 312                         freq = le16_to_cpu(priv->iq_autocal[i].freq);
 313                         p54_update_channel_param(list, freq, CHAN_HAS_CAL);
 314                 }
 315
 316                 if (i < priv->output_limit->entries) {
 317                         freq = le16_to_cpup((__le16 *) (i *
 318                                             priv->output_limit->entry_size +
 319                                             priv->output_limit->offset +
 320                                             priv->output_limit->data));
 321
 322                         p54_update_channel_param(list, freq, CHAN_HAS_LIMIT);
 323                 }
 324
 325                 if (i < priv->curve_data->entries) {
 326                         freq = le16_to_cpup((__le16 *) (i *
 327                                             priv->curve_data->entry_size +
 328                                             priv->curve_data->offset +
 329                                             priv->curve_data->data));
 330
 331                         p54_update_channel_param(list, freq, CHAN_HAS_CURVE);
 332                 }
 333         }
 334
 335         /* sort the channel list by frequency */
 336         sort(list->channels, list->entries, sizeof(struct p54_channel_entry),
 337              p54_compare_channels, NULL);
 338
 339         k = 0;
 340         for (i = 0, j = 0; i < IEEE80211_NUM_BANDS; i++) {
 341                 if (p54_generate_band(dev, list, &k, i) == 0)
 342                         j++;
 343         }
 344         if (j == 0) {
 345                 /* no useable band available. */
 346                 ret = -EINVAL;
 347         }
 348
 349 free:
 350         if (list) {
 351                 kfree(list->channels);
 352                 kfree(list);
 353         }
 354         if (ret) {
 355                 kfree(priv->survey);
 356                 priv->survey = NULL;
 357         }
 358
 359         return ret;
 360 }
 361
 362 static int p54_convert_rev0(struct ieee80211_hw *dev,
 363                             struct pda_pa_curve_data *curve_data)
 364 {
 365         struct p54_common *priv = dev->priv;
 366         struct p54_pa_curve_data_sample *dst;
 367         struct pda_pa_curve_data_sample_rev0 *src;
 368         size_t cd_len = sizeof(*curve_data) +
 369                 (curve_data->points_per_channel*sizeof(*dst) + 2) *
 370                  curve_data->channels;
 371         unsigned int i, j;
 372         void *source, *target;
 373
 374         priv->curve_data = kmalloc(sizeof(*priv->curve_data) + cd_len,
 375                                    GFP_KERNEL);
 376         if (!priv->curve_data)
 377                 return -ENOMEM;
 378
 379         priv->curve_data->entries = curve_data->channels;
 380         priv->curve_data->entry_size = sizeof(__le16) +
 381                 sizeof(*dst) * curve_data->points_per_channel;
 382         priv->curve_data->offset = offsetof(struct pda_pa_curve_data, data);
 383         priv->curve_data->len = cd_len;
 384         memcpy(priv->curve_data->data, curve_data, sizeof(*curve_data));
 385         source = curve_data->data;
 386         target = ((struct pda_pa_curve_data *) priv->curve_data->data)->data;
 387         for (i = 0; i < curve_data->channels; i++) {
 388                 __le16 *freq = source;
 389                 source += sizeof(__le16);
 390                 *((__le16 *)target) = *freq;
 391                 target += sizeof(__le16);
 392                 for (j = 0; j < curve_data->points_per_channel; j++) {
 393                         dst = target;
 394                         src = source;
 395
 396                         dst->rf_power = src->rf_power;
 397                         dst->pa_detector = src->pa_detector;
 398                         dst->data_64qam = src->pcv;
 399                         /* "invent" the points for the other modulations */
 400 #define SUB(x, y) (u8)(((x) - (y)) > (x) ? 0 : (x) - (y))
 401                         dst->data_16qam = SUB(src->pcv, 12);
 402                         dst->data_qpsk = SUB(dst->data_16qam, 12);
 403                         dst->data_bpsk = SUB(dst->data_qpsk, 12);
 404                         dst->data_barker = SUB(dst->data_bpsk, 14);
 405 #undef SUB
 406                         target += sizeof(*dst);
 407                         source += sizeof(*src);
 408                 }
 409         }
 410
 411         return 0;
 412 }
 413
 414 static int p54_convert_rev1(struct ieee80211_hw *dev,
 415                             struct pda_pa_curve_data *curve_data)
 416 {
 417         struct p54_common *priv = dev->priv;
 418         struct p54_pa_curve_data_sample *dst;
 419         struct pda_pa_curve_data_sample_rev1 *src;
 420         size_t cd_len = sizeof(*curve_data) +
 421                 (curve_data->points_per_channel*sizeof(*dst) + 2) *
 422                  curve_data->channels;
 423         unsigned int i, j;
 424         void *source, *target;
 425
 426         priv->curve_data = kzalloc(cd_len + sizeof(*priv->curve_data),
 427                                    GFP_KERNEL);
 428         if (!priv->curve_data)
 429                 return -ENOMEM;
 430
 431         priv->curve_data->entries = curve_data->channels;
 432         priv->curve_data->entry_size = sizeof(__le16) +
 433                 sizeof(*dst) * curve_data->points_per_channel;
 434         priv->curve_data->offset = offsetof(struct pda_pa_curve_data, data);
 435         priv->curve_data->len = cd_len;
 436         memcpy(priv->curve_data->data, curve_data, sizeof(*curve_data));
 437         source = curve_data->data;
 438         target = ((struct pda_pa_curve_data *) priv->curve_data->data)->data;
 439         for (i = 0; i < curve_data->channels; i++) {
 440                 __le16 *freq = source;
 441                 source += sizeof(__le16);
 442                 *((__le16 *)target) = *freq;
 443                 target += sizeof(__le16);
 444                 for (j = 0; j < curve_data->points_per_channel; j++) {
 445                         memcpy(target, source, sizeof(*src));
 446
 447                         target += sizeof(*dst);
 448                         source += sizeof(*src);
 449                 }
 450                 source++;
 451         }
 452
 453         return 0;
 454 }
 455
 456 static const char *p54_rf_chips[] = { "INVALID-0", "Duette3", "Duette2",
 457         "Frisbee", "Xbow", "Longbow", "INVALID-6", "INVALID-7" };
 458
 459 static int p54_parse_rssical(struct ieee80211_hw *dev,
 460                              u8 *data, int len, u16 type)
 461 {
 462         struct p54_common *priv = dev->priv;
 463         struct p54_rssi_db_entry *entry;
 464         size_t db_len, entries;
 465         int offset = 0, i;
 466
 467         if (type != PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED) {
 468                 entries = (type == PDR_RSSI_LINEAR_APPROXIMATION) ? 1 : 2;
 469                 if (len != sizeof(struct pda_rssi_cal_entry) * entries) {
 470                         wiphy_err(dev->wiphy, "rssical size mismatch.\n");
 471                         goto err_data;
 472                 }
 473         } else {
 474                 /*
 475                  * Some devices (Dell 1450 USB, Xbow 5GHz card, etc...)
 476                  * have an empty two byte header.
 477                  */
 478                 if (*((__le16 *)&data[offset]) == cpu_to_le16(0))
 479                         offset += 2;
 480
 481                 entries = (len - offset) /
 482                         sizeof(struct pda_rssi_cal_ext_entry);
 483
 484                 if ((len - offset) % sizeof(struct pda_rssi_cal_ext_entry) ||
 485                     entries <= 0) {
 486                         wiphy_err(dev->wiphy, "invalid rssi database.\n");
 487                         goto err_data;
 488                 }
 489         }
 490
 491         db_len = sizeof(*entry) * entries;
 492         priv->rssi_db = kzalloc(db_len + sizeof(*priv->rssi_db), GFP_KERNEL);
 493         if (!priv->rssi_db)
 494                 return -ENOMEM;
 495
 496         priv->rssi_db->offset = 0;
 497         priv->rssi_db->entries = entries;
 498         priv->rssi_db->entry_size = sizeof(*entry);
 499         priv->rssi_db->len = db_len;
 500
 501         entry = (void *)((unsigned long)priv->rssi_db->data + priv->rssi_db->offset);
 502         if (type == PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED) {
 503                 struct pda_rssi_cal_ext_entry *cal = (void *) &data[offset];
 504
 505                 for (i = 0; i < entries; i++) {
 506                         entry[i].freq = le16_to_cpu(cal[i].freq);
 507                         entry[i].mul = (s16) le16_to_cpu(cal[i].mul);
 508                         entry[i].add = (s16) le16_to_cpu(cal[i].add);
 509                 }
 510         } else {
 511                 struct pda_rssi_cal_entry *cal = (void *) &data[offset];
 512
 513                 for (i = 0; i < entries; i++) {
 514                         u16 freq = 0;
 515                         switch (i) {
 516                         case IEEE80211_BAND_2GHZ:
 517                                 freq = 2437;
 518                                 break;
 519                         case IEEE80211_BAND_5GHZ:
 520                                 freq = 5240;
 521                                 break;
 522                         }
 523
 524                         entry[i].freq = freq;
 525                         entry[i].mul = (s16) le16_to_cpu(cal[i].mul);
 526                         entry[i].add = (s16) le16_to_cpu(cal[i].add);
 527                 }
 528         }
 529
 530         /* sort the list by channel frequency */
 531         sort(entry, entries, sizeof(*entry), p54_compare_rssichan, NULL);
 532         return 0;
 533
 534 err_data:
 535         wiphy_err(dev->wiphy,
 536                   "rssi calibration data packing type:(%x) len:%d.\n",
 537                   type, len);
 538
 539         print_hex_dump_bytes("rssical:", DUMP_PREFIX_NONE, data, len);
 540
 541         wiphy_err(dev->wiphy, "please report this issue.\n");
 542         return -EINVAL;
 543 }
 544
 545 struct p54_rssi_db_entry *p54_rssi_find(struct p54_common *priv, const u16 freq)
 546 {
 547         struct p54_rssi_db_entry *entry;
 548         int i, found = -1;
 549
 550         if (!priv->rssi_db)
 551                 return &p54_rssi_default;
 552
 553         entry = (void *)(priv->rssi_db->data + priv->rssi_db->offset);
 554         for (i = 0; i < priv->rssi_db->entries; i++) {
 555                 if (!same_band(freq, entry[i].freq))
 556                         continue;
 557
 558                 if (found == -1) {
 559                         found = i;
 560                         continue;
 561                 }
 562
 563                 /* nearest match */
 564                 if (abs(freq - entry[i].freq) <
 565                     abs(freq - entry[found].freq)) {
 566                         found = i;
 567                         continue;
 568                 } else {
 569                         break;
 570                 }
 571         }
 572
 573         return found < 0 ? &p54_rssi_default : &entry[found];
 574 }
 575
 576 static void p54_parse_default_country(struct ieee80211_hw *dev,
 577                                       void *data, int len)
 578 {
 579         struct pda_country *country;
 580
 581         if (len != sizeof(*country)) {
 582                 wiphy_err(dev->wiphy,
 583                           "found possible invalid default country eeprom entry. (entry size: %d)\n",
 584                           len);
 585
 586                 print_hex_dump_bytes("country:", DUMP_PREFIX_NONE,
 587                                      data, len);
 588
 589                 wiphy_err(dev->wiphy, "please report this issue.\n");
 590                 return;
 591         }
 592
 593         country = (struct pda_country *) data;
 594         if (country->flags == PDR_COUNTRY_CERT_CODE_PSEUDO)
 595                 regulatory_hint(dev->wiphy, country->alpha2);
 596         else {
 597                 /* TODO:
 598                  * write a shared/common function that converts
 599                  * "Regulatory domain codes" (802.11-2007 14.8.2.2)
 600                  * into ISO/IEC 3166-1 alpha2 for regulatory_hint.
 601                  */
 602         }
 603 }
 604
 605 static int p54_convert_output_limits(struct ieee80211_hw *dev,
 606                                      u8 *data, size_t len)
 607 {
 608         struct p54_common *priv = dev->priv;
 609
 610         if (len < 2)
 611                 return -EINVAL;
 612
 613         if (data[0] != 0) {
 614                 wiphy_err(dev->wiphy, "unknown output power db revision:%x\n",
 615                           data[0]);
 616                 return -EINVAL;
 617         }
 618
 619         if (2 + data[1] * sizeof(struct pda_channel_output_limit) > len)
 620                 return -EINVAL;
 621
 622         priv->output_limit = kmalloc(data[1] *
 623                 sizeof(struct pda_channel_output_limit) +
 624                 sizeof(*priv->output_limit), GFP_KERNEL);
 625
 626         if (!priv->output_limit)
 627                 return -ENOMEM;
 628
 629         priv->output_limit->offset = 0;
 630         priv->output_limit->entries = data[1];
 631         priv->output_limit->entry_size =
 632                 sizeof(struct pda_channel_output_limit);
 633         priv->output_limit->len = priv->output_limit->entry_size *
 634                                   priv->output_limit->entries +
 635                                   priv->output_limit->offset;
 636
 637         memcpy(priv->output_limit->data, &data[2],
 638                data[1] * sizeof(struct pda_channel_output_limit));
 639
 640         return 0;
 641 }
 642
 643 static struct p54_cal_database *p54_convert_db(struct pda_custom_wrapper *src,
 644                                                size_t total_len)
 645 {
 646         struct p54_cal_database *dst;
 647         size_t payload_len, entries, entry_size, offset;
 648
 649         payload_len = le16_to_cpu(src->len);
 650         entries = le16_to_cpu(src->entries);
 651         entry_size = le16_to_cpu(src->entry_size);
 652         offset = le16_to_cpu(src->offset);
 653         if (((entries * entry_size + offset) != payload_len) ||
 654              (payload_len + sizeof(*src) != total_len))
 655                 return NULL;
 656
 657         dst = kmalloc(sizeof(*dst) + payload_len, GFP_KERNEL);
 658         if (!dst)
 659                 return NULL;
 660
 661         dst->entries = entries;
 662         dst->entry_size = entry_size;
 663         dst->offset = offset;
 664         dst->len = payload_len;
 665
 666         memcpy(dst->data, src->data, payload_len);
 667         return dst;
 668 }
 669
 670 int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
 671 {
 672         struct p54_common *priv = dev->priv;
 673         struct eeprom_pda_wrap *wrap;
 674         struct pda_entry *entry;
 675         unsigned int data_len, entry_len;
 676         void *tmp;
 677         int err;
 678         u8 *end = (u8 *)eeprom + len;
 679         u16 synth = 0;
 680         u16 crc16 = ~0;
 681
 682         wrap = (struct eeprom_pda_wrap *) eeprom;
 683         entry = (void *)wrap->data + le16_to_cpu(wrap->len);
 684
 685         /* verify that at least the entry length/code fits */
 686         while ((u8 *)entry <= end - sizeof(*entry)) {
 687                 entry_len = le16_to_cpu(entry->len);
 688                 data_len = ((entry_len - 1) << 1);
 689
 690                 /* abort if entry exceeds whole structure */
 691                 if ((u8 *)entry + sizeof(*entry) + data_len > end)
 692                         break;
 693
 694                 switch (le16_to_cpu(entry->code)) {
 695                 case PDR_MAC_ADDRESS:
 696                         if (data_len != ETH_ALEN)
 697                                 break;
 698                         SET_IEEE80211_PERM_ADDR(dev, entry->data);
 699                         break;
 700                 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS:
 701                         if (priv->output_limit)
 702                                 break;
 703                         err = p54_convert_output_limits(dev, entry->data,
 704                                                         data_len);
 705                         if (err)
 706                                 goto err;
 707                         break;
 708                 case PDR_PRISM_PA_CAL_CURVE_DATA: {
 709                         struct pda_pa_curve_data *curve_data =
 710                                 (struct pda_pa_curve_data *)entry->data;
 711                         if (data_len < sizeof(*curve_data)) {
 712                                 err = -EINVAL;
 713                                 goto err;
 714                         }
 715
 716                         switch (curve_data->cal_method_rev) {
 717                         case 0:
 718                                 err = p54_convert_rev0(dev, curve_data);
 719                                 break;
 720                         case 1:
 721                                 err = p54_convert_rev1(dev, curve_data);
 722                                 break;
 723                         default:
 724                                 wiphy_err(dev->wiphy,
 725                                           "unknown curve data revision %d\n",
 726                                           curve_data->cal_method_rev);
 727                                 err = -ENODEV;
 728                                 break;
 729                         }
 730                         if (err)
 731                                 goto err;
 732                         }
 733                         break;
 734                 case PDR_PRISM_ZIF_TX_IQ_CALIBRATION:
 735                         priv->iq_autocal = kmemdup(entry->data, data_len,
 736                                                    GFP_KERNEL);
 737                         if (!priv->iq_autocal) {
 738                                 err = -ENOMEM;
 739                                 goto err;
 740                         }
 741
 742                         priv->iq_autocal_len = data_len / sizeof(struct pda_iq_autocal_entry);
 743                         break;
 744                 case PDR_DEFAULT_COUNTRY:
 745                         p54_parse_default_country(dev, entry->data, data_len);
 746                         break;
 747                 case PDR_INTERFACE_LIST:
 748                         tmp = entry->data;
 749                         while ((u8 *)tmp < entry->data + data_len) {
 750                                 struct exp_if *exp_if = tmp;
 751                                 if (exp_if->if_id == cpu_to_le16(IF_ID_ISL39000))
 752                                         synth = le16_to_cpu(exp_if->variant);
 753                                 tmp += sizeof(*exp_if);
 754                         }
 755                         break;
 756                 case PDR_HARDWARE_PLATFORM_COMPONENT_ID:
 757                         if (data_len < 2)
 758                                 break;
 759                         priv->version = *(u8 *)(entry->data + 1);
 760                         break;
 761                 case PDR_RSSI_LINEAR_APPROXIMATION:
 762                 case PDR_RSSI_LINEAR_APPROXIMATION_DUAL_BAND:
 763                 case PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED:
 764                         err = p54_parse_rssical(dev, entry->data, data_len,
 765                                                 le16_to_cpu(entry->code));
 766                         if (err)
 767                                 goto err;
 768                         break;
 769                 case PDR_RSSI_LINEAR_APPROXIMATION_CUSTOMV2: {
 770                         struct pda_custom_wrapper *pda = (void *) entry->data;
 771                         __le16 *src;
 772                         u16 *dst;
 773                         int i;
 774
 775                         if (priv->rssi_db || data_len < sizeof(*pda))
 776                                 break;
 777
 778                         priv->rssi_db = p54_convert_db(pda, data_len);
 779                         if (!priv->rssi_db)
 780                                 break;
 781
 782                         src = (void *) priv->rssi_db->data;
 783                         dst = (void *) priv->rssi_db->data;
 784
 785                         for (i = 0; i < priv->rssi_db->entries; i++)
 786                                 *(dst++) = (s16) le16_to_cpu(*(src++));
 787
 788                         }
 789                         break;
 790                 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS_CUSTOM: {
 791                         struct pda_custom_wrapper *pda = (void *) entry->data;
 792                         if (priv->output_limit || data_len < sizeof(*pda))
 793                                 break;
 794                         priv->output_limit = p54_convert_db(pda, data_len);
 795                         }
 796                         break;
 797                 case PDR_PRISM_PA_CAL_CURVE_DATA_CUSTOM: {
 798                         struct pda_custom_wrapper *pda = (void *) entry->data;
 799                         if (priv->curve_data || data_len < sizeof(*pda))
 800                                 break;
 801                         priv->curve_data = p54_convert_db(pda, data_len);
 802                         }
 803                         break;
 804                 case PDR_END:
 805                         crc16 = ~crc_ccitt(crc16, (u8 *) entry, sizeof(*entry));
 806                         if (crc16 != le16_to_cpup((__le16 *)entry->data)) {
 807                                 wiphy_err(dev->wiphy, "eeprom failed checksum "
 808                                          "test!\n");
 809                                 err = -ENOMSG;
 810                                 goto err;
 811                         } else {
 812                                 goto good_eeprom;
 813                         }
 814                         break;
 815                 default:
 816                         break;
 817                 }
 818
 819                 crc16 = crc_ccitt(crc16, (u8 *)entry, (entry_len + 1) * 2);
 820                 entry = (void *)entry + (entry_len + 1) * 2;
 821         }
 822
 823         wiphy_err(dev->wiphy, "unexpected end of eeprom data.\n");
 824         err = -ENODATA;
 825         goto err;
 826
 827 good_eeprom:
 828         if (!synth || !priv->iq_autocal || !priv->output_limit ||
 829             !priv->curve_data) {
 830                 wiphy_err(dev->wiphy,
 831                           "not all required entries found in eeprom!\n");
 832                 err = -EINVAL;
 833                 goto err;
 834         }
 835
 836         err = p54_generate_channel_lists(dev);
 837         if (err)
 838                 goto err;
 839
 840         priv->rxhw = synth & PDR_SYNTH_FRONTEND_MASK;
 841         if (priv->rxhw == PDR_SYNTH_FRONTEND_XBOW)
 842                 p54_init_xbow_synth(priv);
 843         if (!(synth & PDR_SYNTH_24_GHZ_DISABLED))
 844                 dev->wiphy->bands[IEEE80211_BAND_2GHZ] =
 845                         priv->band_table[IEEE80211_BAND_2GHZ];
 846         if (!(synth & PDR_SYNTH_5_GHZ_DISABLED))
 847                 dev->wiphy->bands[IEEE80211_BAND_5GHZ] =
 848                         priv->band_table[IEEE80211_BAND_5GHZ];
 849         if ((synth & PDR_SYNTH_RX_DIV_MASK) == PDR_SYNTH_RX_DIV_SUPPORTED)
 850                 priv->rx_diversity_mask = 3;
 851         if ((synth & PDR_SYNTH_TX_DIV_MASK) == PDR_SYNTH_TX_DIV_SUPPORTED)
 852                 priv->tx_diversity_mask = 3;
 853
 854         if (!is_valid_ether_addr(dev->wiphy->perm_addr)) {
 855                 u8 perm_addr[ETH_ALEN];
 856
 857                 wiphy_warn(dev->wiphy,
 858                            "Invalid hwaddr! Using randomly generated MAC addr\n");
 859                 random_ether_addr(perm_addr);
 860                 SET_IEEE80211_PERM_ADDR(dev, perm_addr);
 861         }
 862
 863         priv->cur_rssi = &p54_rssi_default;
 864
 865         wiphy_info(dev->wiphy, "hwaddr %pM, MAC:isl38%02x RF:%s\n",
 866                    dev->wiphy->perm_addr, priv->version,
 867                    p54_rf_chips[priv->rxhw]);
 868
 869         return 0;
 870
 871 err:
 872         kfree(priv->iq_autocal);
 873         kfree(priv->output_limit);
 874         kfree(priv->curve_data);
 875         kfree(priv->rssi_db);
 876         kfree(priv->survey);
 877         priv->iq_autocal = NULL;
 878         priv->output_limit = NULL;
 879         priv->curve_data = NULL;
 880         priv->rssi_db = NULL;
 881         priv->survey = NULL;
 882
 883         wiphy_err(dev->wiphy, "eeprom parse failed!\n");
 884         return err;
 885 }
 886 EXPORT_SYMBOL_GPL(p54_parse_eeprom);
 887
 888 int p54_read_eeprom(struct ieee80211_hw *dev)
 889 {
 890         struct p54_common *priv = dev->priv;
 891         size_t eeprom_size = 0x2020, offset = 0, blocksize, maxblocksize;
 892         int ret = -ENOMEM;
 893         void *eeprom;
 894
 895         maxblocksize = EEPROM_READBACK_LEN;
 896         if (priv->fw_var >= 0x509)
 897                 maxblocksize -= 0xc;
 898         else
 899                 maxblocksize -= 0x4;
 900
 901         eeprom = kzalloc(eeprom_size, GFP_KERNEL);
 902         if (unlikely(!eeprom))
 903                 goto free;
 904
 905         while (eeprom_size) {
 906                 blocksize = min(eeprom_size, maxblocksize);
 907                 ret = p54_download_eeprom(priv, (void *) (eeprom + offset),
 908                                           offset, blocksize);
 909                 if (unlikely(ret))
 910                         goto free;
 911
 912                 offset += blocksize;
 913                 eeprom_size -= blocksize;
 914         }
 915
 916         ret = p54_parse_eeprom(dev, eeprom, offset);
 917 free:
 918         kfree(eeprom);
 919         return ret;
 920 }
 921 EXPORT_SYMBOL_GPL(p54_read_eeprom);