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