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 #include <linux/export.h>
  28
  29 #include "p54.h"
  30 #include "eeprom.h"
  31 #include "lmac.h"
  32
  33 static struct ieee80211_rate p54_bgrates[] = {
  34         { .bitrate = 10, .hw_value = 0, },
  35         { .bitrate = 20, .hw_value = 1, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  36         { .bitrate = 55, .hw_value = 2, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  37         { .bitrate = 110, .hw_value = 3, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  38         { .bitrate = 60, .hw_value = 4, },
  39         { .bitrate = 90, .hw_value = 5, },
  40         { .bitrate = 120, .hw_value = 6, },
  41         { .bitrate = 180, .hw_value = 7, },
  42         { .bitrate = 240, .hw_value = 8, },
  43         { .bitrate = 360, .hw_value = 9, },
  44         { .bitrate = 480, .hw_value = 10, },
  45         { .bitrate = 540, .hw_value = 11, },
  46 };
  47
  48 static struct ieee80211_rate p54_arates[] = {
  49         { .bitrate = 60, .hw_value = 4, },
  50         { .bitrate = 90, .hw_value = 5, },
  51         { .bitrate = 120, .hw_value = 6, },
  52         { .bitrate = 180, .hw_value = 7, },
  53         { .bitrate = 240, .hw_value = 8, },
  54         { .bitrate = 360, .hw_value = 9, },
  55         { .bitrate = 480, .hw_value = 10, },
  56         { .bitrate = 540, .hw_value = 11, },
  57 };
  58
  59 static struct p54_rssi_db_entry p54_rssi_default = {
  60         /*
  61          * The defaults are taken from usb-logs of the
  62          * vendor driver. So, they should be safe to
  63          * use in case we can't get a match from the
  64          * rssi <-> dBm conversion database.
  65          */
  66         .mul = 130,
  67         .add = -398,
  68 };
  69
  70 #define CHAN_HAS_CAL            BIT(0)
  71 #define CHAN_HAS_LIMIT          BIT(1)
  72 #define CHAN_HAS_CURVE          BIT(2)
  73 #define CHAN_HAS_ALL            (CHAN_HAS_CAL | CHAN_HAS_LIMIT | CHAN_HAS_CURVE)
  74
  75 struct p54_channel_entry {
  76         u16 freq;
  77         u16 data;
  78         int index;
  79         enum ieee80211_band band;
  80 };
  81
  82 struct p54_channel_list {
  83         struct p54_channel_entry *channels;
  84         size_t entries;
  85         size_t max_entries;
  86         size_t band_channel_num[IEEE80211_NUM_BANDS];
  87 };
  88
  89 static int p54_get_band_from_freq(u16 freq)
  90 {
  91         /* FIXME: sync these values with the 802.11 spec */
  92
  93         if ((freq >= 2412) && (freq <= 2484))
  94                 return IEEE80211_BAND_2GHZ;
  95
  96         if ((freq >= 4920) && (freq <= 5825))
  97                 return IEEE80211_BAND_5GHZ;
  98
  99         return -1;
 100 }
 101
 102 static int same_band(u16 freq, u16 freq2)
 103 {
 104         return p54_get_band_from_freq(freq) == p54_get_band_from_freq(freq2);
 105 }
 106
 107 static int p54_compare_channels(const void *_a,
 108                                 const void *_b)
 109 {
 110         const struct p54_channel_entry *a = _a;
 111         const struct p54_channel_entry *b = _b;
 112
 113         return a->freq - b->freq;
 114 }
 115
 116 static int p54_compare_rssichan(const void *_a,
 117                                 const void *_b)
 118 {
 119         const struct p54_rssi_db_entry *a = _a;
 120         const struct p54_rssi_db_entry *b = _b;
 121
 122         return a->freq - b->freq;
 123 }
 124
 125 static int p54_fill_band_bitrates(struct ieee80211_hw *dev,
 126                                   struct ieee80211_supported_band *band_entry,
 127                                   enum ieee80211_band band)
 128 {
 129         /* TODO: generate rate array dynamically */
 130
 131         switch (band) {
 132         case IEEE80211_BAND_2GHZ:
 133                 band_entry->bitrates = p54_bgrates;
 134                 band_entry->n_bitrates = ARRAY_SIZE(p54_bgrates);
 135                 break;
 136         case IEEE80211_BAND_5GHZ:
 137                 band_entry->bitrates = p54_arates;
 138                 band_entry->n_bitrates = ARRAY_SIZE(p54_arates);
 139                 break;
 140         default:
 141                 return -EINVAL;
 142         }
 143
 144         return 0;
 145 }
 146
 147 static int p54_generate_band(struct ieee80211_hw *dev,
 148                              struct p54_channel_list *list,
 149                              unsigned int *chan_num,
 150                              enum ieee80211_band band)
 151 {
 152         struct p54_common *priv = dev->priv;
 153         struct ieee80211_supported_band *tmp, *old;
 154         unsigned int i, j;
 155         int ret = -ENOMEM;
 156
 157         if ((!list->entries) || (!list->band_channel_num[band]))
 158                 return -EINVAL;
 159
 160         tmp = kzalloc(sizeof(*tmp), GFP_KERNEL);
 161         if (!tmp)
 162                 goto err_out;
 163
 164         tmp->channels = kzalloc(sizeof(struct ieee80211_channel) *
 165                                 list->band_channel_num[band], GFP_KERNEL);
 166         if (!tmp->channels)
 167                 goto err_out;
 168
 169         ret = p54_fill_band_bitrates(dev, tmp, band);
 170         if (ret)
 171                 goto err_out;
 172
 173         for (i = 0, j = 0; (j < list->band_channel_num[band]) &&
 174                            (i < list->entries); i++) {
 175                 struct p54_channel_entry *chan = &list->channels[i];
 176
 177                 if (chan->band != band)
 178                         continue;
 179
 180                 if (chan->data != CHAN_HAS_ALL) {
 181                         wiphy_err(dev->wiphy, "%s%s%s is/are missing for "
 182                                   "channel:%d [%d MHz].\n",
 183                                   (chan->data & CHAN_HAS_CAL ? "" :
 184                                    " [iqauto calibration data]"),
 185                                   (chan->data & CHAN_HAS_LIMIT ? "" :
 186                                    " [output power limits]"),
 187                                   (chan->data & CHAN_HAS_CURVE ? "" :
 188                                    " [curve data]"),
 189                                   chan->index, chan->freq);
 190                         continue;
 191                 }
 192
 193                 tmp->channels[j].band = chan->band;
 194                 tmp->channels[j].center_freq = chan->freq;
 195                 priv->survey[*chan_num].channel = &tmp->channels[j];
 196                 priv->survey[*chan_num].filled = SURVEY_INFO_NOISE_DBM |
 197                         SURVEY_INFO_CHANNEL_TIME |
 198                         SURVEY_INFO_CHANNEL_TIME_BUSY |
 199                         SURVEY_INFO_CHANNEL_TIME_TX;
 200                 tmp->channels[j].hw_value = (*chan_num);
 201                 j++;
 202                 (*chan_num)++;
 203         }
 204
 205         if (j == 0) {
 206                 wiphy_err(dev->wiphy, "Disabling totally damaged %d GHz band\n",
 207                           (band == IEEE80211_BAND_2GHZ) ? 2 : 5);
 208
 209                 ret = -ENODATA;
 210                 goto err_out;
 211         }
 212
 213         tmp->n_channels = j;
 214         old = priv->band_table[band];
 215         priv->band_table[band] = tmp;
 216         if (old) {
 217                 kfree(old->channels);
 218                 kfree(old);
 219         }
 220
 221         return 0;
 222
 223 err_out:
 224         if (tmp) {
 225                 kfree(tmp->channels);
 226                 kfree(tmp);
 227         }
 228
 229         return ret;
 230 }
 231
 232 static void p54_update_channel_param(struct p54_channel_list *list,
 233                                      u16 freq, u16 data)
 234 {
 235         int band, i;
 236
 237         /*
 238          * usually all lists in the eeprom are mostly sorted.
 239          * so it's very likely that the entry we are looking for
 240          * is right at the end of the list
 241          */
 242         for (i = list->entries; i >= 0; i--) {
 243                 if (freq == list->channels[i].freq) {
 244                         list->channels[i].data |= data;
 245                         break;
 246                 }
 247         }
 248
 249         if ((i < 0) && (list->entries < list->max_entries)) {
 250                 /* entry does not exist yet. Initialize a new one. */
 251                 band = p54_get_band_from_freq(freq);
 252
 253                 /*
 254                  * filter out frequencies which don't belong into
 255                  * any supported band.
 256                  */
 257                 if (band < 0)
 258                         return ;
 259
 260                 i = list->entries++;
 261                 list->band_channel_num[band]++;
 262
 263                 list->channels[i].freq = freq;
 264                 list->channels[i].data = data;
 265                 list->channels[i].band = band;
 266                 list->channels[i].index = ieee80211_frequency_to_channel(freq);
 267                 /* TODO: parse output_limit and fill max_power */
 268         }
 269 }
 270
 271 static int p54_generate_channel_lists(struct ieee80211_hw *dev)
 272 {
 273         struct p54_common *priv = dev->priv;
 274         struct p54_channel_list *list;
 275         unsigned int i, j, k, max_channel_num;
 276         int ret = 0;
 277         u16 freq;
 278
 279         if ((priv->iq_autocal_len != priv->curve_data->entries) ||
 280             (priv->iq_autocal_len != priv->output_limit->entries))
 281                 wiphy_err(dev->wiphy,
 282                           "Unsupported or damaged EEPROM detected. "
 283                           "You may not be able to use all channels.\n");
 284
 285         max_channel_num = max_t(unsigned int, priv->output_limit->entries,
 286                                 priv->iq_autocal_len);
 287         max_channel_num = max_t(unsigned int, max_channel_num,
 288                                 priv->curve_data->entries);
 289
 290         list = kzalloc(sizeof(*list), GFP_KERNEL);
 291         if (!list) {
 292                 ret = -ENOMEM;
 293                 goto free;
 294         }
 295         priv->chan_num = max_channel_num;
 296         priv->survey = kzalloc(sizeof(struct survey_info) * max_channel_num,
 297                                GFP_KERNEL);
 298         if (!priv->survey) {
 299                 ret = -ENOMEM;
 300                 goto free;
 301         }
 302
 303         list->max_entries = max_channel_num;
 304         list->channels = kzalloc(sizeof(struct p54_channel_entry) *
 305                                  max_channel_num, GFP_KERNEL);
 306         if (!list->channels) {
 307                 ret = -ENOMEM;
 308                 goto free;
 309         }
 310
 311         for (i = 0; i < max_channel_num; i++) {
 312                 if (i < priv->iq_autocal_len) {
 313                         freq = le16_to_cpu(priv->iq_autocal[i].freq);
 314                         p54_update_channel_param(list, freq, CHAN_HAS_CAL);
 315                 }
 316
 317                 if (i < priv->output_limit->entries) {
 318                         freq = le16_to_cpup((__le16 *) (i *
 319                                             priv->output_limit->entry_size +
 320                                             priv->output_limit->offset +
 321                                             priv->output_limit->data));
 322
 323                         p54_update_channel_param(list, freq, CHAN_HAS_LIMIT);
 324                 }
 325
 326                 if (i < priv->curve_data->entries) {
 327                         freq = le16_to_cpup((__le16 *) (i *
 328                                             priv->curve_data->entry_size +
 329                                             priv->curve_data->offset +
 330                                             priv->curve_data->data));
 331
 332                         p54_update_channel_param(list, freq, CHAN_HAS_CURVE);
 333                 }
 334         }
 335
 336         /* sort the channel list by frequency */
 337         sort(list->channels, list->entries, sizeof(struct p54_channel_entry),
 338              p54_compare_channels, NULL);
 339
 340         k = 0;
 341         for (i = 0, j = 0; i < IEEE80211_NUM_BANDS; i++) {
 342                 if (p54_generate_band(dev, list, &k, i) == 0)
 343                         j++;
 344         }
 345         if (j == 0) {
 346                 /* no useable band available. */
 347                 ret = -EINVAL;
 348         }
 349
 350 free:
 351         if (list) {
 352                 kfree(list->channels);
 353                 kfree(list);
 354         }
 355         if (ret) {
 356                 kfree(priv->survey);
 357                 priv->survey = NULL;
 358         }
 359
 360         return ret;
 361 }
 362
 363 static int p54_convert_rev0(struct ieee80211_hw *dev,
 364                             struct pda_pa_curve_data *curve_data)
 365 {
 366         struct p54_common *priv = dev->priv;
 367         struct p54_pa_curve_data_sample *dst;
 368         struct pda_pa_curve_data_sample_rev0 *src;
 369         size_t cd_len = sizeof(*curve_data) +
 370                 (curve_data->points_per_channel*sizeof(*dst) + 2) *
 371                  curve_data->channels;
 372         unsigned int i, j;
 373         void *source, *target;
 374
 375         priv->curve_data = kmalloc(sizeof(*priv->curve_data) + cd_len,
 376                                    GFP_KERNEL);
 377         if (!priv->curve_data)
 378                 return -ENOMEM;
 379
 380         priv->curve_data->entries = curve_data->channels;
 381         priv->curve_data->entry_size = sizeof(__le16) +
 382                 sizeof(*dst) * curve_data->points_per_channel;
 383         priv->curve_data->offset = offsetof(struct pda_pa_curve_data, data);
 384         priv->curve_data->len = cd_len;
 385         memcpy(priv->curve_data->data, curve_data, sizeof(*curve_data));
 386         source = curve_data->data;
 387         target = ((struct pda_pa_curve_data *) priv->curve_data->data)->data;
 388         for (i = 0; i < curve_data->channels; i++) {
 389                 __le16 *freq = source;
 390                 source += sizeof(__le16);
 391                 *((__le16 *)target) = *freq;
 392                 target += sizeof(__le16);
 393                 for (j = 0; j < curve_data->points_per_channel; j++) {
 394                         dst = target;
 395                         src = source;
 396
 397                         dst->rf_power = src->rf_power;
 398                         dst->pa_detector = src->pa_detector;
 399                         dst->data_64qam = src->pcv;
 400                         /* "invent" the points for the other modulations */
 401 #define SUB(x, y) (u8)(((x) - (y)) > (x) ? 0 : (x) - (y))
 402                         dst->data_16qam = SUB(src->pcv, 12);
 403                         dst->data_qpsk = SUB(dst->data_16qam, 12);
 404                         dst->data_bpsk = SUB(dst->data_qpsk, 12);
 405                         dst->data_barker = SUB(dst->data_bpsk, 14);
 406 #undef SUB
 407                         target += sizeof(*dst);
 408                         source += sizeof(*src);
 409                 }
 410         }
 411
 412         return 0;
 413 }
 414
 415 static int p54_convert_rev1(struct ieee80211_hw *dev,
 416                             struct pda_pa_curve_data *curve_data)
 417 {
 418         struct p54_common *priv = dev->priv;
 419         struct p54_pa_curve_data_sample *dst;
 420         struct pda_pa_curve_data_sample_rev1 *src;
 421         size_t cd_len = sizeof(*curve_data) +
 422                 (curve_data->points_per_channel*sizeof(*dst) + 2) *
 423                  curve_data->channels;
 424         unsigned int i, j;
 425         void *source, *target;
 426
 427         priv->curve_data = kzalloc(cd_len + sizeof(*priv->curve_data),
 428                                    GFP_KERNEL);
 429         if (!priv->curve_data)
 430                 return -ENOMEM;
 431
 432         priv->curve_data->entries = curve_data->channels;
 433         priv->curve_data->entry_size = sizeof(__le16) +
 434                 sizeof(*dst) * curve_data->points_per_channel;
 435         priv->curve_data->offset = offsetof(struct pda_pa_curve_data, data);
 436         priv->curve_data->len = cd_len;
 437         memcpy(priv->curve_data->data, curve_data, sizeof(*curve_data));
 438         source = curve_data->data;
 439         target = ((struct pda_pa_curve_data *) priv->curve_data->data)->data;
 440         for (i = 0; i < curve_data->channels; i++) {
 441                 __le16 *freq = source;
 442                 source += sizeof(__le16);
 443                 *((__le16 *)target) = *freq;
 444                 target += sizeof(__le16);
 445                 for (j = 0; j < curve_data->points_per_channel; j++) {
 446                         memcpy(target, source, sizeof(*src));
 447
 448                         target += sizeof(*dst);
 449                         source += sizeof(*src);
 450                 }
 451                 source++;
 452         }
 453
 454         return 0;
 455 }
 456
 457 static const char *p54_rf_chips[] = { "INVALID-0", "Duette3", "Duette2",
 458         "Frisbee", "Xbow", "Longbow", "INVALID-6", "INVALID-7" };
 459
 460 static int p54_parse_rssical(struct ieee80211_hw *dev,
 461                              u8 *data, int len, u16 type)
 462 {
 463         struct p54_common *priv = dev->priv;
 464         struct p54_rssi_db_entry *entry;
 465         size_t db_len, entries;
 466         int offset = 0, i;
 467
 468         if (type != PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED) {
 469                 entries = (type == PDR_RSSI_LINEAR_APPROXIMATION) ? 1 : 2;
 470                 if (len != sizeof(struct pda_rssi_cal_entry) * entries) {
 471                         wiphy_err(dev->wiphy, "rssical size mismatch.\n");
 472                         goto err_data;
 473                 }
 474         } else {
 475                 /*
 476                  * Some devices (Dell 1450 USB, Xbow 5GHz card, etc...)
 477                  * have an empty two byte header.
 478                  */
 479                 if (*((__le16 *)&data[offset]) == cpu_to_le16(0))
 480                         offset += 2;
 481
 482                 entries = (len - offset) /
 483                         sizeof(struct pda_rssi_cal_ext_entry);
 484
 485                 if ((len - offset) % sizeof(struct pda_rssi_cal_ext_entry) ||
 486                     entries <= 0) {
 487                         wiphy_err(dev->wiphy, "invalid rssi database.\n");
 488                         goto err_data;
 489                 }
 490         }
 491
 492         db_len = sizeof(*entry) * entries;
 493         priv->rssi_db = kzalloc(db_len + sizeof(*priv->rssi_db), GFP_KERNEL);
 494         if (!priv->rssi_db)
 495                 return -ENOMEM;
 496
 497         priv->rssi_db->offset = 0;
 498         priv->rssi_db->entries = entries;
 499         priv->rssi_db->entry_size = sizeof(*entry);
 500         priv->rssi_db->len = db_len;
 501
 502         entry = (void *)((unsigned long)priv->rssi_db->data + priv->rssi_db->offset);
 503         if (type == PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED) {
 504                 struct pda_rssi_cal_ext_entry *cal = (void *) &data[offset];
 505
 506                 for (i = 0; i < entries; i++) {
 507                         entry[i].freq = le16_to_cpu(cal[i].freq);
 508                         entry[i].mul = (s16) le16_to_cpu(cal[i].mul);
 509                         entry[i].add = (s16) le16_to_cpu(cal[i].add);
 510                 }
 511         } else {
 512                 struct pda_rssi_cal_entry *cal = (void *) &data[offset];
 513
 514                 for (i = 0; i < entries; i++) {
 515                         u16 freq = 0;
 516                         switch (i) {
 517                         case IEEE80211_BAND_2GHZ:
 518                                 freq = 2437;
 519                                 break;
 520                         case IEEE80211_BAND_5GHZ:
 521                                 freq = 5240;
 522                                 break;
 523                         }
 524
 525                         entry[i].freq = freq;
 526                         entry[i].mul = (s16) le16_to_cpu(cal[i].mul);
 527                         entry[i].add = (s16) le16_to_cpu(cal[i].add);
 528                 }
 529         }
 530
 531         /* sort the list by channel frequency */
 532         sort(entry, entries, sizeof(*entry), p54_compare_rssichan, NULL);
 533         return 0;
 534
 535 err_data:
 536         wiphy_err(dev->wiphy,
 537                   "rssi calibration data packing type:(%x) len:%d.\n",
 538                   type, len);
 539
 540         print_hex_dump_bytes("rssical:", DUMP_PREFIX_NONE, data, len);
 541
 542         wiphy_err(dev->wiphy, "please report this issue.\n");
 543         return -EINVAL;
 544 }
 545
 546 struct p54_rssi_db_entry *p54_rssi_find(struct p54_common *priv, const u16 freq)
 547 {
 548         struct p54_rssi_db_entry *entry;
 549         int i, found = -1;
 550
 551         if (!priv->rssi_db)
 552                 return &p54_rssi_default;
 553
 554         entry = (void *)(priv->rssi_db->data + priv->rssi_db->offset);
 555         for (i = 0; i < priv->rssi_db->entries; i++) {
 556                 if (!same_band(freq, entry[i].freq))
 557                         continue;
 558
 559                 if (found == -1) {
 560                         found = i;
 561                         continue;
 562                 }
 563
 564                 /* nearest match */
 565                 if (abs(freq - entry[i].freq) <
 566                     abs(freq - entry[found].freq)) {
 567                         found = i;
 568                         continue;
 569                 } else {
 570                         break;
 571                 }
 572         }
 573
 574         return found < 0 ? &p54_rssi_default : &entry[found];
 575 }
 576
 577 static void p54_parse_default_country(struct ieee80211_hw *dev,
 578                                       void *data, int len)
 579 {
 580         struct pda_country *country;
 581
 582         if (len != sizeof(*country)) {
 583                 wiphy_err(dev->wiphy,
 584                           "found possible invalid default country eeprom entry. (entry size: %d)\n",
 585                           len);
 586
 587                 print_hex_dump_bytes("country:", DUMP_PREFIX_NONE,
 588                                      data, len);
 589
 590                 wiphy_err(dev->wiphy, "please report this issue.\n");
 591                 return;
 592         }
 593
 594         country = (struct pda_country *) data;
 595         if (country->flags == PDR_COUNTRY_CERT_CODE_PSEUDO)
 596                 regulatory_hint(dev->wiphy, country->alpha2);
 597         else {
 598                 /* TODO:
 599                  * write a shared/common function that converts
 600                  * "Regulatory domain codes" (802.11-2007 14.8.2.2)
 601                  * into ISO/IEC 3166-1 alpha2 for regulatory_hint.
 602                  */
 603         }
 604 }
 605
 606 static int p54_convert_output_limits(struct ieee80211_hw *dev,
 607                                      u8 *data, size_t len)
 608 {
 609         struct p54_common *priv = dev->priv;
 610
 611         if (len < 2)
 612                 return -EINVAL;
 613
 614         if (data[0] != 0) {
 615                 wiphy_err(dev->wiphy, "unknown output power db revision:%x\n",
 616                           data[0]);
 617                 return -EINVAL;
 618         }
 619
 620         if (2 + data[1] * sizeof(struct pda_channel_output_limit) > len)
 621                 return -EINVAL;
 622
 623         priv->output_limit = kmalloc(data[1] *
 624                 sizeof(struct pda_channel_output_limit) +
 625                 sizeof(*priv->output_limit), GFP_KERNEL);
 626
 627         if (!priv->output_limit)
 628                 return -ENOMEM;
 629
 630         priv->output_limit->offset = 0;
 631         priv->output_limit->entries = data[1];
 632         priv->output_limit->entry_size =
 633                 sizeof(struct pda_channel_output_limit);
 634         priv->output_limit->len = priv->output_limit->entry_size *
 635                                   priv->output_limit->entries +
 636                                   priv->output_limit->offset;
 637
 638         memcpy(priv->output_limit->data, &data[2],
 639                data[1] * sizeof(struct pda_channel_output_limit));
 640
 641         return 0;
 642 }
 643
 644 static struct p54_cal_database *p54_convert_db(struct pda_custom_wrapper *src,
 645                                                size_t total_len)
 646 {
 647         struct p54_cal_database *dst;
 648         size_t payload_len, entries, entry_size, offset;
 649
 650         payload_len = le16_to_cpu(src->len);
 651         entries = le16_to_cpu(src->entries);
 652         entry_size = le16_to_cpu(src->entry_size);
 653         offset = le16_to_cpu(src->offset);
 654         if (((entries * entry_size + offset) != payload_len) ||
 655              (payload_len + sizeof(*src) != total_len))
 656                 return NULL;
 657
 658         dst = kmalloc(sizeof(*dst) + payload_len, GFP_KERNEL);
 659         if (!dst)
 660                 return NULL;
 661
 662         dst->entries = entries;
 663         dst->entry_size = entry_size;
 664         dst->offset = offset;
 665         dst->len = payload_len;
 666
 667         memcpy(dst->data, src->data, payload_len);
 668         return dst;
 669 }
 670
 671 int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
 672 {
 673         struct p54_common *priv = dev->priv;
 674         struct eeprom_pda_wrap *wrap;
 675         struct pda_entry *entry;
 676         unsigned int data_len, entry_len;
 677         void *tmp;
 678         int err;
 679         u8 *end = (u8 *)eeprom + len;
 680         u16 synth = 0;
 681         u16 crc16 = ~0;
 682
 683         wrap = (struct eeprom_pda_wrap *) eeprom;
 684         entry = (void *)wrap->data + le16_to_cpu(wrap->len);
 685
 686         /* verify that at least the entry length/code fits */
 687         while ((u8 *)entry <= end - sizeof(*entry)) {
 688                 entry_len = le16_to_cpu(entry->len);
 689                 data_len = ((entry_len - 1) << 1);
 690
 691                 /* abort if entry exceeds whole structure */
 692                 if ((u8 *)entry + sizeof(*entry) + data_len > end)
 693                         break;
 694
 695                 switch (le16_to_cpu(entry->code)) {
 696                 case PDR_MAC_ADDRESS:
 697                         if (data_len != ETH_ALEN)
 698                                 break;
 699                         SET_IEEE80211_PERM_ADDR(dev, entry->data);
 700                         break;
 701                 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS:
 702                         if (priv->output_limit)
 703                                 break;
 704                         err = p54_convert_output_limits(dev, entry->data,
 705                                                         data_len);
 706                         if (err)
 707                                 goto err;
 708                         break;
 709                 case PDR_PRISM_PA_CAL_CURVE_DATA: {
 710                         struct pda_pa_curve_data *curve_data =
 711                                 (struct pda_pa_curve_data *)entry->data;
 712                         if (data_len < sizeof(*curve_data)) {
 713                                 err = -EINVAL;
 714                                 goto err;
 715                         }
 716
 717                         switch (curve_data->cal_method_rev) {
 718                         case 0:
 719                                 err = p54_convert_rev0(dev, curve_data);
 720                                 break;
 721                         case 1:
 722                                 err = p54_convert_rev1(dev, curve_data);
 723                                 break;
 724                         default:
 725                                 wiphy_err(dev->wiphy,
 726                                           "unknown curve data revision %d\n",
 727                                           curve_data->cal_method_rev);
 728                                 err = -ENODEV;
 729                                 break;
 730                         }
 731                         if (err)
 732                                 goto err;
 733                         }
 734                         break;
 735                 case PDR_PRISM_ZIF_TX_IQ_CALIBRATION:
 736                         priv->iq_autocal = kmemdup(entry->data, data_len,
 737                                                    GFP_KERNEL);
 738                         if (!priv->iq_autocal) {
 739                                 err = -ENOMEM;
 740                                 goto err;
 741                         }
 742
 743                         priv->iq_autocal_len = data_len / sizeof(struct pda_iq_autocal_entry);
 744                         break;
 745                 case PDR_DEFAULT_COUNTRY:
 746                         p54_parse_default_country(dev, entry->data, data_len);
 747                         break;
 748                 case PDR_INTERFACE_LIST:
 749                         tmp = entry->data;
 750                         while ((u8 *)tmp < entry->data + data_len) {
 751                                 struct exp_if *exp_if = tmp;
 752                                 if (exp_if->if_id == cpu_to_le16(IF_ID_ISL39000))
 753                                         synth = le16_to_cpu(exp_if->variant);
 754                                 tmp += sizeof(*exp_if);
 755                         }
 756                         break;
 757                 case PDR_HARDWARE_PLATFORM_COMPONENT_ID:
 758                         if (data_len < 2)
 759                                 break;
 760                         priv->version = *(u8 *)(entry->data + 1);
 761                         break;
 762                 case PDR_RSSI_LINEAR_APPROXIMATION:
 763                 case PDR_RSSI_LINEAR_APPROXIMATION_DUAL_BAND:
 764                 case PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED:
 765                         err = p54_parse_rssical(dev, entry->data, data_len,
 766                                                 le16_to_cpu(entry->code));
 767                         if (err)
 768                                 goto err;
 769                         break;
 770                 case PDR_RSSI_LINEAR_APPROXIMATION_CUSTOMV2: {
 771                         struct pda_custom_wrapper *pda = (void *) entry->data;
 772                         __le16 *src;
 773                         u16 *dst;
 774                         int i;
 775
 776                         if (priv->rssi_db || data_len < sizeof(*pda))
 777                                 break;
 778
 779                         priv->rssi_db = p54_convert_db(pda, data_len);
 780                         if (!priv->rssi_db)
 781                                 break;
 782
 783                         src = (void *) priv->rssi_db->data;
 784                         dst = (void *) priv->rssi_db->data;
 785
 786                         for (i = 0; i < priv->rssi_db->entries; i++)
 787                                 *(dst++) = (s16) le16_to_cpu(*(src++));
 788
 789                         }
 790                         break;
 791                 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS_CUSTOM: {
 792                         struct pda_custom_wrapper *pda = (void *) entry->data;
 793                         if (priv->output_limit || data_len < sizeof(*pda))
 794                                 break;
 795                         priv->output_limit = p54_convert_db(pda, data_len);
 796                         }
 797                         break;
 798                 case PDR_PRISM_PA_CAL_CURVE_DATA_CUSTOM: {
 799                         struct pda_custom_wrapper *pda = (void *) entry->data;
 800                         if (priv->curve_data || data_len < sizeof(*pda))
 801                                 break;
 802                         priv->curve_data = p54_convert_db(pda, data_len);
 803                         }
 804                         break;
 805                 case PDR_END:
 806                         crc16 = ~crc_ccitt(crc16, (u8 *) entry, sizeof(*entry));
 807                         if (crc16 != le16_to_cpup((__le16 *)entry->data)) {
 808                                 wiphy_err(dev->wiphy, "eeprom failed checksum "
 809                                          "test!\n");
 810                                 err = -ENOMSG;
 811                                 goto err;
 812                         } else {
 813                                 goto good_eeprom;
 814                         }
 815                         break;
 816                 default:
 817                         break;
 818                 }
 819
 820                 crc16 = crc_ccitt(crc16, (u8 *)entry, (entry_len + 1) * 2);
 821                 entry = (void *)entry + (entry_len + 1) * 2;
 822         }
 823
 824         wiphy_err(dev->wiphy, "unexpected end of eeprom data.\n");
 825         err = -ENODATA;
 826         goto err;
 827
 828 good_eeprom:
 829         if (!synth || !priv->iq_autocal || !priv->output_limit ||
 830             !priv->curve_data) {
 831                 wiphy_err(dev->wiphy,
 832                           "not all required entries found in eeprom!\n");
 833                 err = -EINVAL;
 834                 goto err;
 835         }
 836
 837         err = p54_generate_channel_lists(dev);
 838         if (err)
 839                 goto err;
 840
 841         priv->rxhw = synth & PDR_SYNTH_FRONTEND_MASK;
 842         if (priv->rxhw == PDR_SYNTH_FRONTEND_XBOW)
 843                 p54_init_xbow_synth(priv);
 844         if (!(synth & PDR_SYNTH_24_GHZ_DISABLED))
 845                 dev->wiphy->bands[IEEE80211_BAND_2GHZ] =
 846                         priv->band_table[IEEE80211_BAND_2GHZ];
 847         if (!(synth & PDR_SYNTH_5_GHZ_DISABLED))
 848                 dev->wiphy->bands[IEEE80211_BAND_5GHZ] =
 849                         priv->band_table[IEEE80211_BAND_5GHZ];
 850         if ((synth & PDR_SYNTH_RX_DIV_MASK) == PDR_SYNTH_RX_DIV_SUPPORTED)
 851                 priv->rx_diversity_mask = 3;
 852         if ((synth & PDR_SYNTH_TX_DIV_MASK) == PDR_SYNTH_TX_DIV_SUPPORTED)
 853                 priv->tx_diversity_mask = 3;
 854
 855         if (!is_valid_ether_addr(dev->wiphy->perm_addr)) {
 856                 u8 perm_addr[ETH_ALEN];
 857
 858                 wiphy_warn(dev->wiphy,
 859                            "Invalid hwaddr! Using randomly generated MAC addr\n");
 860                 random_ether_addr(perm_addr);
 861                 SET_IEEE80211_PERM_ADDR(dev, perm_addr);
 862         }
 863
 864         priv->cur_rssi = &p54_rssi_default;
 865
 866         wiphy_info(dev->wiphy, "hwaddr %pM, MAC:isl38%02x RF:%s\n",
 867                    dev->wiphy->perm_addr, priv->version,
 868                    p54_rf_chips[priv->rxhw]);
 869
 870         return 0;
 871
 872 err:
 873         kfree(priv->iq_autocal);
 874         kfree(priv->output_limit);
 875         kfree(priv->curve_data);
 876         kfree(priv->rssi_db);
 877         kfree(priv->survey);
 878         priv->iq_autocal = NULL;
 879         priv->output_limit = NULL;
 880         priv->curve_data = NULL;
 881         priv->rssi_db = NULL;
 882         priv->survey = NULL;
 883
 884         wiphy_err(dev->wiphy, "eeprom parse failed!\n");
 885         return err;
 886 }
 887 EXPORT_SYMBOL_GPL(p54_parse_eeprom);
 888
 889 int p54_read_eeprom(struct ieee80211_hw *dev)
 890 {
 891         struct p54_common *priv = dev->priv;
 892         size_t eeprom_size = 0x2020, offset = 0, blocksize, maxblocksize;
 893         int ret = -ENOMEM;
 894         void *eeprom;
 895
 896         maxblocksize = EEPROM_READBACK_LEN;
 897         if (priv->fw_var >= 0x509)
 898                 maxblocksize -= 0xc;
 899         else
 900                 maxblocksize -= 0x4;
 901
 902         eeprom = kzalloc(eeprom_size, GFP_KERNEL);
 903         if (unlikely(!eeprom))
 904                 goto free;
 905
 906         while (eeprom_size) {
 907                 blocksize = min(eeprom_size, maxblocksize);
 908                 ret = p54_download_eeprom(priv, (void *) (eeprom + offset),
 909                                           offset, blocksize);
 910                 if (unlikely(ret))
 911                         goto free;
 912
 913                 offset += blocksize;
 914                 eeprom_size -= blocksize;
 915         }
 916
 917         ret = p54_parse_eeprom(dev, eeprom, offset);
 918 free:
 919         kfree(eeprom);
 920         return ret;
 921 }
 922 EXPORT_SYMBOL_GPL(p54_read_eeprom);