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                 goto free;
 266
 267         for (i = 0; i < max_channel_num; i++) {
 268                 if (i < priv->iq_autocal_len) {
 269                         freq = le16_to_cpu(priv->iq_autocal[i].freq);
 270                         p54_update_channel_param(list, freq, CHAN_HAS_CAL);
 271                 }
 272
 273                 if (i < priv->output_limit->entries) {
 274                         freq = le16_to_cpup((__le16 *) (i *
 275                                             priv->output_limit->entry_size +
 276                                             priv->output_limit->offset +
 277                                             priv->output_limit->data));
 278
 279                         p54_update_channel_param(list, freq, CHAN_HAS_LIMIT);
 280                 }
 281
 282                 if (i < priv->curve_data->entries) {
 283                         freq = le16_to_cpup((__le16 *) (i *
 284                                             priv->curve_data->entry_size +
 285                                             priv->curve_data->offset +
 286                                             priv->curve_data->data));
 287
 288                         p54_update_channel_param(list, freq, CHAN_HAS_CURVE);
 289                 }
 290         }
 291
 292         /* sort the list by the channel index */
 293         sort(list->channels, list->entries, sizeof(struct p54_channel_entry),
 294              p54_compare_channels, NULL);
 295
 296         for (i = 0, j = 0; i < IEEE80211_NUM_BANDS; i++) {
 297                 if (p54_generate_band(dev, list, i) == 0)
 298                         j++;
 299         }
 300         if (j == 0) {
 301                 /* no useable band available. */
 302                 ret = -EINVAL;
 303         }
 304
 305 free:
 306         if (list) {
 307                 kfree(list->channels);
 308                 kfree(list);
 309         }
 310
 311         return ret;
 312 }
 313
 314 static int p54_convert_rev0(struct ieee80211_hw *dev,
 315                             struct pda_pa_curve_data *curve_data)
 316 {
 317         struct p54_common *priv = dev->priv;
 318         struct p54_pa_curve_data_sample *dst;
 319         struct pda_pa_curve_data_sample_rev0 *src;
 320         size_t cd_len = sizeof(*curve_data) +
 321                 (curve_data->points_per_channel*sizeof(*dst) + 2) *
 322                  curve_data->channels;
 323         unsigned int i, j;
 324         void *source, *target;
 325
 326         priv->curve_data = kmalloc(sizeof(*priv->curve_data) + cd_len,
 327                                    GFP_KERNEL);
 328         if (!priv->curve_data)
 329                 return -ENOMEM;
 330
 331         priv->curve_data->entries = curve_data->channels;
 332         priv->curve_data->entry_size = sizeof(__le16) +
 333                 sizeof(*dst) * curve_data->points_per_channel;
 334         priv->curve_data->offset = offsetof(struct pda_pa_curve_data, data);
 335         priv->curve_data->len = cd_len;
 336         memcpy(priv->curve_data->data, curve_data, sizeof(*curve_data));
 337         source = curve_data->data;
 338         target = ((struct pda_pa_curve_data *) priv->curve_data->data)->data;
 339         for (i = 0; i < curve_data->channels; i++) {
 340                 __le16 *freq = source;
 341                 source += sizeof(__le16);
 342                 *((__le16 *)target) = *freq;
 343                 target += sizeof(__le16);
 344                 for (j = 0; j < curve_data->points_per_channel; j++) {
 345                         dst = target;
 346                         src = source;
 347
 348                         dst->rf_power = src->rf_power;
 349                         dst->pa_detector = src->pa_detector;
 350                         dst->data_64qam = src->pcv;
 351                         /* "invent" the points for the other modulations */
 352 #define SUB(x, y) (u8)(((x) - (y)) > (x) ? 0 : (x) - (y))
 353                         dst->data_16qam = SUB(src->pcv, 12);
 354                         dst->data_qpsk = SUB(dst->data_16qam, 12);
 355                         dst->data_bpsk = SUB(dst->data_qpsk, 12);
 356                         dst->data_barker = SUB(dst->data_bpsk, 14);
 357 #undef SUB
 358                         target += sizeof(*dst);
 359                         source += sizeof(*src);
 360                 }
 361         }
 362
 363         return 0;
 364 }
 365
 366 static int p54_convert_rev1(struct ieee80211_hw *dev,
 367                             struct pda_pa_curve_data *curve_data)
 368 {
 369         struct p54_common *priv = dev->priv;
 370         struct p54_pa_curve_data_sample *dst;
 371         struct pda_pa_curve_data_sample_rev1 *src;
 372         size_t cd_len = sizeof(*curve_data) +
 373                 (curve_data->points_per_channel*sizeof(*dst) + 2) *
 374                  curve_data->channels;
 375         unsigned int i, j;
 376         void *source, *target;
 377
 378         priv->curve_data = kzalloc(cd_len + sizeof(*priv->curve_data),
 379                                    GFP_KERNEL);
 380         if (!priv->curve_data)
 381                 return -ENOMEM;
 382
 383         priv->curve_data->entries = curve_data->channels;
 384         priv->curve_data->entry_size = sizeof(__le16) +
 385                 sizeof(*dst) * curve_data->points_per_channel;
 386         priv->curve_data->offset = offsetof(struct pda_pa_curve_data, data);
 387         priv->curve_data->len = cd_len;
 388         memcpy(priv->curve_data->data, curve_data, sizeof(*curve_data));
 389         source = curve_data->data;
 390         target = ((struct pda_pa_curve_data *) priv->curve_data->data)->data;
 391         for (i = 0; i < curve_data->channels; i++) {
 392                 __le16 *freq = source;
 393                 source += sizeof(__le16);
 394                 *((__le16 *)target) = *freq;
 395                 target += sizeof(__le16);
 396                 for (j = 0; j < curve_data->points_per_channel; j++) {
 397                         memcpy(target, source, sizeof(*src));
 398
 399                         target += sizeof(*dst);
 400                         source += sizeof(*src);
 401                 }
 402                 source++;
 403         }
 404
 405         return 0;
 406 }
 407
 408 static const char *p54_rf_chips[] = { "INVALID-0", "Duette3", "Duette2",
 409         "Frisbee", "Xbow", "Longbow", "INVALID-6", "INVALID-7" };
 410
 411 static void p54_parse_rssical(struct ieee80211_hw *dev, void *data, int len,
 412                              u16 type)
 413 {
 414         struct p54_common *priv = dev->priv;
 415         int offset = (type == PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED) ? 2 : 0;
 416         int entry_size = sizeof(struct pda_rssi_cal_entry) + offset;
 417         int num_entries = (type == PDR_RSSI_LINEAR_APPROXIMATION) ? 1 : 2;
 418         int i;
 419
 420         if (len != (entry_size * num_entries)) {
 421                 wiphy_err(dev->wiphy,
 422                           "unknown rssi calibration data packing type:(%x) len:%d.\n",
 423                           type, len);
 424
 425                 print_hex_dump_bytes("rssical:", DUMP_PREFIX_NONE,
 426                                      data, len);
 427
 428                 wiphy_err(dev->wiphy, "please report this issue.\n");
 429                 return;
 430         }
 431
 432         for (i = 0; i < num_entries; i++) {
 433                 struct pda_rssi_cal_entry *cal = data +
 434                                                  (offset + i * entry_size);
 435                 priv->rssical_db[i].mul = (s16) le16_to_cpu(cal->mul);
 436                 priv->rssical_db[i].add = (s16) le16_to_cpu(cal->add);
 437         }
 438 }
 439
 440 static void p54_parse_default_country(struct ieee80211_hw *dev,
 441                                       void *data, int len)
 442 {
 443         struct pda_country *country;
 444
 445         if (len != sizeof(*country)) {
 446                 wiphy_err(dev->wiphy,
 447                           "found possible invalid default country eeprom entry. (entry size: %d)\n",
 448                           len);
 449
 450                 print_hex_dump_bytes("country:", DUMP_PREFIX_NONE,
 451                                      data, len);
 452
 453                 wiphy_err(dev->wiphy, "please report this issue.\n");
 454                 return;
 455         }
 456
 457         country = (struct pda_country *) data;
 458         if (country->flags == PDR_COUNTRY_CERT_CODE_PSEUDO)
 459                 regulatory_hint(dev->wiphy, country->alpha2);
 460         else {
 461                 /* TODO:
 462                  * write a shared/common function that converts
 463                  * "Regulatory domain codes" (802.11-2007 14.8.2.2)
 464                  * into ISO/IEC 3166-1 alpha2 for regulatory_hint.
 465                  */
 466         }
 467 }
 468
 469 static int p54_convert_output_limits(struct ieee80211_hw *dev,
 470                                      u8 *data, size_t len)
 471 {
 472         struct p54_common *priv = dev->priv;
 473
 474         if (len < 2)
 475                 return -EINVAL;
 476
 477         if (data[0] != 0) {
 478                 wiphy_err(dev->wiphy, "unknown output power db revision:%x\n",
 479                           data[0]);
 480                 return -EINVAL;
 481         }
 482
 483         if (2 + data[1] * sizeof(struct pda_channel_output_limit) > len)
 484                 return -EINVAL;
 485
 486         priv->output_limit = kmalloc(data[1] *
 487                 sizeof(struct pda_channel_output_limit) +
 488                 sizeof(*priv->output_limit), GFP_KERNEL);
 489
 490         if (!priv->output_limit)
 491                 return -ENOMEM;
 492
 493         priv->output_limit->offset = 0;
 494         priv->output_limit->entries = data[1];
 495         priv->output_limit->entry_size =
 496                 sizeof(struct pda_channel_output_limit);
 497         priv->output_limit->len = priv->output_limit->entry_size *
 498                                   priv->output_limit->entries +
 499                                   priv->output_limit->offset;
 500
 501         memcpy(priv->output_limit->data, &data[2],
 502                data[1] * sizeof(struct pda_channel_output_limit));
 503
 504         return 0;
 505 }
 506
 507 static struct p54_cal_database *p54_convert_db(struct pda_custom_wrapper *src,
 508                                                size_t total_len)
 509 {
 510         struct p54_cal_database *dst;
 511         size_t payload_len, entries, entry_size, offset;
 512
 513         payload_len = le16_to_cpu(src->len);
 514         entries = le16_to_cpu(src->entries);
 515         entry_size = le16_to_cpu(src->entry_size);
 516         offset = le16_to_cpu(src->offset);
 517         if (((entries * entry_size + offset) != payload_len) ||
 518              (payload_len + sizeof(*src) != total_len))
 519                 return NULL;
 520
 521         dst = kmalloc(sizeof(*dst) + payload_len, GFP_KERNEL);
 522         if (!dst)
 523                 return NULL;
 524
 525         dst->entries = entries;
 526         dst->entry_size = entry_size;
 527         dst->offset = offset;
 528         dst->len = payload_len;
 529
 530         memcpy(dst->data, src->data, payload_len);
 531         return dst;
 532 }
 533
 534 int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
 535 {
 536         struct p54_common *priv = dev->priv;
 537         struct eeprom_pda_wrap *wrap;
 538         struct pda_entry *entry;
 539         unsigned int data_len, entry_len;
 540         void *tmp;
 541         int err;
 542         u8 *end = (u8 *)eeprom + len;
 543         u16 synth = 0;
 544         u16 crc16 = ~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                         crc16 = ~crc_ccitt(crc16, (u8 *) entry, sizeof(*entry));
 661                         if (crc16 != le16_to_cpup((__le16 *)entry->data)) {
 662                                 wiphy_err(dev->wiphy, "eeprom failed checksum "
 663                                          "test!\n");
 664                                 err = -ENOMSG;
 665                                 goto err;
 666                         } else {
 667                                 goto good_eeprom;
 668                         }
 669                         break;
 670                 default:
 671                         break;
 672                 }
 673
 674                 crc16 = crc_ccitt(crc16, (u8 *)entry, (entry_len + 1) * 2);
 675                 entry = (void *)entry + (entry_len + 1) * 2;
 676         }
 677
 678         wiphy_err(dev->wiphy, "unexpected end of eeprom data.\n");
 679         err = -ENODATA;
 680         goto err;
 681
 682 good_eeprom:
 683         if (!synth || !priv->iq_autocal || !priv->output_limit ||
 684             !priv->curve_data) {
 685                 wiphy_err(dev->wiphy,
 686                           "not all required entries found in eeprom!\n");
 687                 err = -EINVAL;
 688                 goto err;
 689         }
 690
 691         err = p54_generate_channel_lists(dev);
 692         if (err)
 693                 goto err;
 694
 695         priv->rxhw = synth & PDR_SYNTH_FRONTEND_MASK;
 696         if (priv->rxhw == PDR_SYNTH_FRONTEND_XBOW)
 697                 p54_init_xbow_synth(priv);
 698         if (!(synth & PDR_SYNTH_24_GHZ_DISABLED))
 699                 dev->wiphy->bands[IEEE80211_BAND_2GHZ] =
 700                         priv->band_table[IEEE80211_BAND_2GHZ];
 701         if (!(synth & PDR_SYNTH_5_GHZ_DISABLED))
 702                 dev->wiphy->bands[IEEE80211_BAND_5GHZ] =
 703                         priv->band_table[IEEE80211_BAND_5GHZ];
 704         if ((synth & PDR_SYNTH_RX_DIV_MASK) == PDR_SYNTH_RX_DIV_SUPPORTED)
 705                 priv->rx_diversity_mask = 3;
 706         if ((synth & PDR_SYNTH_TX_DIV_MASK) == PDR_SYNTH_TX_DIV_SUPPORTED)
 707                 priv->tx_diversity_mask = 3;
 708
 709         if (!is_valid_ether_addr(dev->wiphy->perm_addr)) {
 710                 u8 perm_addr[ETH_ALEN];
 711
 712                 wiphy_warn(dev->wiphy,
 713                            "Invalid hwaddr! Using randomly generated MAC addr\n");
 714                 random_ether_addr(perm_addr);
 715                 SET_IEEE80211_PERM_ADDR(dev, perm_addr);
 716         }
 717
 718         wiphy_info(dev->wiphy, "hwaddr %pM, MAC:isl38%02x RF:%s\n",
 719                    dev->wiphy->perm_addr, priv->version,
 720                    p54_rf_chips[priv->rxhw]);
 721
 722         return 0;
 723
 724 err:
 725         kfree(priv->iq_autocal);
 726         kfree(priv->output_limit);
 727         kfree(priv->curve_data);
 728         priv->iq_autocal = NULL;
 729         priv->output_limit = NULL;
 730         priv->curve_data = NULL;
 731
 732         wiphy_err(dev->wiphy, "eeprom parse failed!\n");
 733         return err;
 734 }
 735 EXPORT_SYMBOL_GPL(p54_parse_eeprom);
 736
 737 int p54_read_eeprom(struct ieee80211_hw *dev)
 738 {
 739         struct p54_common *priv = dev->priv;
 740         size_t eeprom_size = 0x2020, offset = 0, blocksize, maxblocksize;
 741         int ret = -ENOMEM;
 742         void *eeprom;
 743
 744         maxblocksize = EEPROM_READBACK_LEN;
 745         if (priv->fw_var >= 0x509)
 746                 maxblocksize -= 0xc;
 747         else
 748                 maxblocksize -= 0x4;
 749
 750         eeprom = kzalloc(eeprom_size, GFP_KERNEL);
 751         if (unlikely(!eeprom))
 752                 goto free;
 753
 754         while (eeprom_size) {
 755                 blocksize = min(eeprom_size, maxblocksize);
 756                 ret = p54_download_eeprom(priv, (void *) (eeprom + offset),
 757                                           offset, blocksize);
 758                 if (unlikely(ret))
 759                         goto free;
 760
 761                 offset += blocksize;
 762                 eeprom_size -= blocksize;
 763         }
 764
 765         ret = p54_parse_eeprom(dev, eeprom, offset);
 766 free:
 767         kfree(eeprom);
 768         return ret;
 769 }
 770 EXPORT_SYMBOL_GPL(p54_read_eeprom);