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