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/firmware.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/sort.h>
  22 #include <linux/slab.h>
  23
  24 #include <net/mac80211.h>
  25 #include <linux/crc-ccitt.h>
  26 #include <linux/export.h>
  27
  28 #include "p54.h"
  29 #include "eeprom.h"
  30 #include "lmac.h"
  31
  32 static struct ieee80211_rate p54_bgrates[] = {
  33         { .bitrate = 10, .hw_value = 0, },
  34         { .bitrate = 20, .hw_value = 1, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  35         { .bitrate = 55, .hw_value = 2, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  36         { .bitrate = 110, .hw_value = 3, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  37         { .bitrate = 60, .hw_value = 4, },
  38         { .bitrate = 90, .hw_value = 5, },
  39         { .bitrate = 120, .hw_value = 6, },
  40         { .bitrate = 180, .hw_value = 7, },
  41         { .bitrate = 240, .hw_value = 8, },
  42         { .bitrate = 360, .hw_value = 9, },
  43         { .bitrate = 480, .hw_value = 10, },
  44         { .bitrate = 540, .hw_value = 11, },
  45 };
  46
  47 static struct ieee80211_rate p54_arates[] = {
  48         { .bitrate = 60, .hw_value = 4, },
  49         { .bitrate = 90, .hw_value = 5, },
  50         { .bitrate = 120, .hw_value = 6, },
  51         { .bitrate = 180, .hw_value = 7, },
  52         { .bitrate = 240, .hw_value = 8, },
  53         { .bitrate = 360, .hw_value = 9, },
  54         { .bitrate = 480, .hw_value = 10, },
  55         { .bitrate = 540, .hw_value = 11, },
  56 };
  57
  58 static struct p54_rssi_db_entry p54_rssi_default = {
  59         /*
  60          * The defaults are taken from usb-logs of the
  61          * vendor driver. So, they should be safe to
  62          * use in case we can't get a match from the
  63          * rssi <-> dBm conversion database.
  64          */
  65         .mul = 130,
  66         .add = -398,
  67 };
  68
  69 #define CHAN_HAS_CAL            BIT(0)
  70 #define CHAN_HAS_LIMIT          BIT(1)
  71 #define CHAN_HAS_CURVE          BIT(2)
  72 #define CHAN_HAS_ALL            (CHAN_HAS_CAL | CHAN_HAS_LIMIT | CHAN_HAS_CURVE)
  73
  74 struct p54_channel_entry {
  75         u16 freq;
  76         u16 data;
  77         int index;
  78         int max_power;
  79         enum ieee80211_band band;
  80 };
  81
  82 struct p54_channel_list {
  83         struct p54_channel_entry *channels;
  84         size_t entries;
  85         size_t max_entries;
  86         size_t band_channel_num[IEEE80211_NUM_BANDS];
  87 };
  88
  89 static int p54_get_band_from_freq(u16 freq)
  90 {
  91         /* FIXME: sync these values with the 802.11 spec */
  92
  93         if ((freq >= 2412) && (freq <= 2484))
  94                 return IEEE80211_BAND_2GHZ;
  95
  96         if ((freq >= 4920) && (freq <= 5825))
  97                 return IEEE80211_BAND_5GHZ;
  98
  99         return -1;
 100 }
 101
 102 static int same_band(u16 freq, u16 freq2)
 103 {
 104         return p54_get_band_from_freq(freq) == p54_get_band_from_freq(freq2);
 105 }
 106
 107 static int p54_compare_channels(const void *_a,
 108                                 const void *_b)
 109 {
 110         const struct p54_channel_entry *a = _a;
 111         const struct p54_channel_entry *b = _b;
 112
 113         return a->freq - b->freq;
 114 }
 115
 116 static int p54_compare_rssichan(const void *_a,
 117                                 const void *_b)
 118 {
 119         const struct p54_rssi_db_entry *a = _a;
 120         const struct p54_rssi_db_entry *b = _b;
 121
 122         return a->freq - b->freq;
 123 }
 124
 125 static int p54_fill_band_bitrates(struct ieee80211_hw *dev,
 126                                   struct ieee80211_supported_band *band_entry,
 127                                   enum ieee80211_band band)
 128 {
 129         /* TODO: generate rate array dynamically */
 130
 131         switch (band) {
 132         case IEEE80211_BAND_2GHZ:
 133                 band_entry->bitrates = p54_bgrates;
 134                 band_entry->n_bitrates = ARRAY_SIZE(p54_bgrates);
 135                 break;
 136         case IEEE80211_BAND_5GHZ:
 137                 band_entry->bitrates = p54_arates;
 138                 band_entry->n_bitrates = ARRAY_SIZE(p54_arates);
 139                 break;
 140         default:
 141                 return -EINVAL;
 142         }
 143
 144         return 0;
 145 }
 146
 147 static int p54_generate_band(struct ieee80211_hw *dev,
 148                              struct p54_channel_list *list,
 149                              unsigned int *chan_num,
 150                              enum ieee80211_band band)
 151 {
 152         struct p54_common *priv = dev->priv;
 153         struct ieee80211_supported_band *tmp, *old;
 154         unsigned int i, j;
 155         int ret = -ENOMEM;
 156
 157         if ((!list->entries) || (!list->band_channel_num[band]))
 158                 return -EINVAL;
 159
 160         tmp = kzalloc(sizeof(*tmp), GFP_KERNEL);
 161         if (!tmp)
 162                 goto err_out;
 163
 164         tmp->channels = kzalloc(sizeof(struct ieee80211_channel) *
 165                                 list->band_channel_num[band], GFP_KERNEL);
 166         if (!tmp->channels)
 167                 goto err_out;
 168
 169         ret = p54_fill_band_bitrates(dev, tmp, band);
 170         if (ret)
 171                 goto err_out;
 172
 173         for (i = 0, j = 0; (j < list->band_channel_num[band]) &&
 174                            (i < list->entries); i++) {
 175                 struct p54_channel_entry *chan = &list->channels[i];
 176                 struct ieee80211_channel *dest = &tmp->channels[j];
 177
 178                 if (chan->band != band)
 179                         continue;
 180
 181                 if (chan->data != CHAN_HAS_ALL) {
 182                         wiphy_err(dev->wiphy, "%s%s%s is/are missing for "
 183                                   "channel:%d [%d MHz].\n",
 184                                   (chan->data & CHAN_HAS_CAL ? "" :
 185                                    " [iqauto calibration data]"),
 186                                   (chan->data & CHAN_HAS_LIMIT ? "" :
 187                                    " [output power limits]"),
 188                                   (chan->data & CHAN_HAS_CURVE ? "" :
 189                                    " [curve data]"),
 190                                   chan->index, chan->freq);
 191                         continue;
 192                 }
 193
 194                 dest->band = chan->band;
 195                 dest->center_freq = chan->freq;
 196                 dest->max_power = chan->max_power;
 197                 priv->survey[*chan_num].channel = &tmp->channels[j];
 198                 priv->survey[*chan_num].filled = SURVEY_INFO_NOISE_DBM |
 199                         SURVEY_INFO_CHANNEL_TIME |
 200                         SURVEY_INFO_CHANNEL_TIME_BUSY |
 201                         SURVEY_INFO_CHANNEL_TIME_TX;
 202                 dest->hw_value = (*chan_num);
 203                 j++;
 204                 (*chan_num)++;
 205         }
 206
 207         if (j == 0) {
 208                 wiphy_err(dev->wiphy, "Disabling totally damaged %d GHz band\n",
 209                           (band == IEEE80211_BAND_2GHZ) ? 2 : 5);
 210
 211                 ret = -ENODATA;
 212                 goto err_out;
 213         }
 214
 215         tmp->n_channels = j;
 216         old = priv->band_table[band];
 217         priv->band_table[band] = tmp;
 218         if (old) {
 219                 kfree(old->channels);
 220                 kfree(old);
 221         }
 222
 223         return 0;
 224
 225 err_out:
 226         if (tmp) {
 227                 kfree(tmp->channels);
 228                 kfree(tmp);
 229         }
 230
 231         return ret;
 232 }
 233
 234 static struct p54_channel_entry *p54_update_channel_param(struct p54_channel_list *list,
 235                                                           u16 freq, u16 data)
 236 {
 237         int i;
 238         struct p54_channel_entry *entry = NULL;
 239
 240         /*
 241          * usually all lists in the eeprom are mostly sorted.
 242          * so it's very likely that the entry we are looking for
 243          * is right at the end of the list
 244          */
 245         for (i = list->entries; i >= 0; i--) {
 246                 if (freq == list->channels[i].freq) {
 247                         entry = &list->channels[i];
 248                         break;
 249                 }
 250         }
 251
 252         if ((i < 0) && (list->entries < list->max_entries)) {
 253                 /* entry does not exist yet. Initialize a new one. */
 254                 int band = p54_get_band_from_freq(freq);
 255
 256                 /*
 257                  * filter out frequencies which don't belong into
 258                  * any supported band.
 259                  */
 260                 if (band >= 0) {
 261                         i = list->entries++;
 262                         list->band_channel_num[band]++;
 263
 264                         entry = &list->channels[i];
 265                         entry->freq = freq;
 266                         entry->band = band;
 267                         entry->index = ieee80211_frequency_to_channel(freq);
 268                         entry->max_power = 0;
 269                         entry->data = 0;
 270                 }
 271         }
 272
 273         if (entry)
 274                 entry->data |= data;
 275
 276         return entry;
 277 }
 278
 279 static int p54_get_maxpower(struct p54_common *priv, void *data)
 280 {
 281         switch (priv->rxhw & PDR_SYNTH_FRONTEND_MASK) {
 282         case PDR_SYNTH_FRONTEND_LONGBOW: {
 283                 struct pda_channel_output_limit_longbow *pda = data;
 284                 int j;
 285                 u16 rawpower = 0;
 286                 pda = data;
 287                 for (j = 0; j < ARRAY_SIZE(pda->point); j++) {
 288                         struct pda_channel_output_limit_point_longbow *point =
 289                                 &pda->point[j];
 290                         rawpower = max_t(u16,
 291                                 rawpower, le16_to_cpu(point->val_qpsk));
 292                         rawpower = max_t(u16,
 293                                 rawpower, le16_to_cpu(point->val_bpsk));
 294                         rawpower = max_t(u16,
 295                                 rawpower, le16_to_cpu(point->val_16qam));
 296                         rawpower = max_t(u16,
 297                                 rawpower, le16_to_cpu(point->val_64qam));
 298                 }
 299                 /* longbow seems to use 1/16 dBm units */
 300                 return rawpower / 16;
 301                 }
 302
 303         case PDR_SYNTH_FRONTEND_DUETTE3:
 304         case PDR_SYNTH_FRONTEND_DUETTE2:
 305         case PDR_SYNTH_FRONTEND_FRISBEE:
 306         case PDR_SYNTH_FRONTEND_XBOW: {
 307                 struct pda_channel_output_limit *pda = data;
 308                 u8 rawpower = 0;
 309                 rawpower = max(rawpower, pda->val_qpsk);
 310                 rawpower = max(rawpower, pda->val_bpsk);
 311                 rawpower = max(rawpower, pda->val_16qam);
 312                 rawpower = max(rawpower, pda->val_64qam);
 313                 /* raw values are in 1/4 dBm units */
 314                 return rawpower / 4;
 315                 }
 316
 317         default:
 318                 return 20;
 319         }
 320 }
 321
 322 static int p54_generate_channel_lists(struct ieee80211_hw *dev)
 323 {
 324         struct p54_common *priv = dev->priv;
 325         struct p54_channel_list *list;
 326         unsigned int i, j, k, max_channel_num;
 327         int ret = 0;
 328         u16 freq;
 329
 330         if ((priv->iq_autocal_len != priv->curve_data->entries) ||
 331             (priv->iq_autocal_len != priv->output_limit->entries))
 332                 wiphy_err(dev->wiphy,
 333                           "Unsupported or damaged EEPROM detected. "
 334                           "You may not be able to use all channels.\n");
 335
 336         max_channel_num = max_t(unsigned int, priv->output_limit->entries,
 337                                 priv->iq_autocal_len);
 338         max_channel_num = max_t(unsigned int, max_channel_num,
 339                                 priv->curve_data->entries);
 340
 341         list = kzalloc(sizeof(*list), GFP_KERNEL);
 342         if (!list) {
 343                 ret = -ENOMEM;
 344                 goto free;
 345         }
 346         priv->chan_num = max_channel_num;
 347         priv->survey = kzalloc(sizeof(struct survey_info) * max_channel_num,
 348                                GFP_KERNEL);
 349         if (!priv->survey) {
 350                 ret = -ENOMEM;
 351                 goto free;
 352         }
 353
 354         list->max_entries = max_channel_num;
 355         list->channels = kzalloc(sizeof(struct p54_channel_entry) *
 356                                  max_channel_num, GFP_KERNEL);
 357         if (!list->channels) {
 358                 ret = -ENOMEM;
 359                 goto free;
 360         }
 361
 362         for (i = 0; i < max_channel_num; i++) {
 363                 if (i < priv->iq_autocal_len) {
 364                         freq = le16_to_cpu(priv->iq_autocal[i].freq);
 365                         p54_update_channel_param(list, freq, CHAN_HAS_CAL);
 366                 }
 367
 368                 if (i < priv->output_limit->entries) {
 369                         struct p54_channel_entry *tmp;
 370
 371                         void *data = (void *) ((unsigned long) i *
 372                                 priv->output_limit->entry_size +
 373                                 priv->output_limit->offset +
 374                                 priv->output_limit->data);
 375
 376                         freq = le16_to_cpup((__le16 *) data);
 377                         tmp = p54_update_channel_param(list, freq,
 378                                                        CHAN_HAS_LIMIT);
 379                         if (tmp) {
 380                                 tmp->max_power = p54_get_maxpower(priv, data);
 381                         }
 382                 }
 383
 384                 if (i < priv->curve_data->entries) {
 385                         freq = le16_to_cpup((__le16 *) (i *
 386                                             priv->curve_data->entry_size +
 387                                             priv->curve_data->offset +
 388                                             priv->curve_data->data));
 389
 390                         p54_update_channel_param(list, freq, CHAN_HAS_CURVE);
 391                 }
 392         }
 393
 394         /* sort the channel list by frequency */
 395         sort(list->channels, list->entries, sizeof(struct p54_channel_entry),
 396              p54_compare_channels, NULL);
 397
 398         k = 0;
 399         for (i = 0, j = 0; i < IEEE80211_NUM_BANDS; i++) {
 400                 if (p54_generate_band(dev, list, &k, i) == 0)
 401                         j++;
 402         }
 403         if (j == 0) {
 404                 /* no useable band available. */
 405                 ret = -EINVAL;
 406         }
 407
 408 free:
 409         if (list) {
 410                 kfree(list->channels);
 411                 kfree(list);
 412         }
 413         if (ret) {
 414                 kfree(priv->survey);
 415                 priv->survey = NULL;
 416         }
 417
 418         return ret;
 419 }
 420
 421 static int p54_convert_rev0(struct ieee80211_hw *dev,
 422                             struct pda_pa_curve_data *curve_data)
 423 {
 424         struct p54_common *priv = dev->priv;
 425         struct p54_pa_curve_data_sample *dst;
 426         struct pda_pa_curve_data_sample_rev0 *src;
 427         size_t cd_len = sizeof(*curve_data) +
 428                 (curve_data->points_per_channel*sizeof(*dst) + 2) *
 429                  curve_data->channels;
 430         unsigned int i, j;
 431         void *source, *target;
 432
 433         priv->curve_data = kmalloc(sizeof(*priv->curve_data) + cd_len,
 434                                    GFP_KERNEL);
 435         if (!priv->curve_data)
 436                 return -ENOMEM;
 437
 438         priv->curve_data->entries = curve_data->channels;
 439         priv->curve_data->entry_size = sizeof(__le16) +
 440                 sizeof(*dst) * curve_data->points_per_channel;
 441         priv->curve_data->offset = offsetof(struct pda_pa_curve_data, data);
 442         priv->curve_data->len = cd_len;
 443         memcpy(priv->curve_data->data, curve_data, sizeof(*curve_data));
 444         source = curve_data->data;
 445         target = ((struct pda_pa_curve_data *) priv->curve_data->data)->data;
 446         for (i = 0; i < curve_data->channels; i++) {
 447                 __le16 *freq = source;
 448                 source += sizeof(__le16);
 449                 *((__le16 *)target) = *freq;
 450                 target += sizeof(__le16);
 451                 for (j = 0; j < curve_data->points_per_channel; j++) {
 452                         dst = target;
 453                         src = source;
 454
 455                         dst->rf_power = src->rf_power;
 456                         dst->pa_detector = src->pa_detector;
 457                         dst->data_64qam = src->pcv;
 458                         /* "invent" the points for the other modulations */
 459 #define SUB(x, y) (u8)(((x) - (y)) > (x) ? 0 : (x) - (y))
 460                         dst->data_16qam = SUB(src->pcv, 12);
 461                         dst->data_qpsk = SUB(dst->data_16qam, 12);
 462                         dst->data_bpsk = SUB(dst->data_qpsk, 12);
 463                         dst->data_barker = SUB(dst->data_bpsk, 14);
 464 #undef SUB
 465                         target += sizeof(*dst);
 466                         source += sizeof(*src);
 467                 }
 468         }
 469
 470         return 0;
 471 }
 472
 473 static int p54_convert_rev1(struct ieee80211_hw *dev,
 474                             struct pda_pa_curve_data *curve_data)
 475 {
 476         struct p54_common *priv = dev->priv;
 477         struct p54_pa_curve_data_sample *dst;
 478         struct pda_pa_curve_data_sample_rev1 *src;
 479         size_t cd_len = sizeof(*curve_data) +
 480                 (curve_data->points_per_channel*sizeof(*dst) + 2) *
 481                  curve_data->channels;
 482         unsigned int i, j;
 483         void *source, *target;
 484
 485         priv->curve_data = kzalloc(cd_len + sizeof(*priv->curve_data),
 486                                    GFP_KERNEL);
 487         if (!priv->curve_data)
 488                 return -ENOMEM;
 489
 490         priv->curve_data->entries = curve_data->channels;
 491         priv->curve_data->entry_size = sizeof(__le16) +
 492                 sizeof(*dst) * curve_data->points_per_channel;
 493         priv->curve_data->offset = offsetof(struct pda_pa_curve_data, data);
 494         priv->curve_data->len = cd_len;
 495         memcpy(priv->curve_data->data, curve_data, sizeof(*curve_data));
 496         source = curve_data->data;
 497         target = ((struct pda_pa_curve_data *) priv->curve_data->data)->data;
 498         for (i = 0; i < curve_data->channels; i++) {
 499                 __le16 *freq = source;
 500                 source += sizeof(__le16);
 501                 *((__le16 *)target) = *freq;
 502                 target += sizeof(__le16);
 503                 for (j = 0; j < curve_data->points_per_channel; j++) {
 504                         memcpy(target, source, sizeof(*src));
 505
 506                         target += sizeof(*dst);
 507                         source += sizeof(*src);
 508                 }
 509                 source++;
 510         }
 511
 512         return 0;
 513 }
 514
 515 static const char *p54_rf_chips[] = { "INVALID-0", "Duette3", "Duette2",
 516         "Frisbee", "Xbow", "Longbow", "INVALID-6", "INVALID-7" };
 517
 518 static int p54_parse_rssical(struct ieee80211_hw *dev,
 519                              u8 *data, int len, u16 type)
 520 {
 521         struct p54_common *priv = dev->priv;
 522         struct p54_rssi_db_entry *entry;
 523         size_t db_len, entries;
 524         int offset = 0, i;
 525
 526         if (type != PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED) {
 527                 entries = (type == PDR_RSSI_LINEAR_APPROXIMATION) ? 1 : 2;
 528                 if (len != sizeof(struct pda_rssi_cal_entry) * entries) {
 529                         wiphy_err(dev->wiphy, "rssical size mismatch.\n");
 530                         goto err_data;
 531                 }
 532         } else {
 533                 /*
 534                  * Some devices (Dell 1450 USB, Xbow 5GHz card, etc...)
 535                  * have an empty two byte header.
 536                  */
 537                 if (*((__le16 *)&data[offset]) == cpu_to_le16(0))
 538                         offset += 2;
 539
 540                 entries = (len - offset) /
 541                         sizeof(struct pda_rssi_cal_ext_entry);
 542
 543                 if (len < offset ||
 544                     (len - offset) % sizeof(struct pda_rssi_cal_ext_entry) ||
 545                     entries == 0) {
 546                         wiphy_err(dev->wiphy, "invalid rssi database.\n");
 547                         goto err_data;
 548                 }
 549         }
 550
 551         db_len = sizeof(*entry) * entries;
 552         priv->rssi_db = kzalloc(db_len + sizeof(*priv->rssi_db), GFP_KERNEL);
 553         if (!priv->rssi_db)
 554                 return -ENOMEM;
 555
 556         priv->rssi_db->offset = 0;
 557         priv->rssi_db->entries = entries;
 558         priv->rssi_db->entry_size = sizeof(*entry);
 559         priv->rssi_db->len = db_len;
 560
 561         entry = (void *)((unsigned long)priv->rssi_db->data + priv->rssi_db->offset);
 562         if (type == PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED) {
 563                 struct pda_rssi_cal_ext_entry *cal = (void *) &data[offset];
 564
 565                 for (i = 0; i < entries; i++) {
 566                         entry[i].freq = le16_to_cpu(cal[i].freq);
 567                         entry[i].mul = (s16) le16_to_cpu(cal[i].mul);
 568                         entry[i].add = (s16) le16_to_cpu(cal[i].add);
 569                 }
 570         } else {
 571                 struct pda_rssi_cal_entry *cal = (void *) &data[offset];
 572
 573                 for (i = 0; i < entries; i++) {
 574                         u16 freq = 0;
 575                         switch (i) {
 576                         case IEEE80211_BAND_2GHZ:
 577                                 freq = 2437;
 578                                 break;
 579                         case IEEE80211_BAND_5GHZ:
 580                                 freq = 5240;
 581                                 break;
 582                         }
 583
 584                         entry[i].freq = freq;
 585                         entry[i].mul = (s16) le16_to_cpu(cal[i].mul);
 586                         entry[i].add = (s16) le16_to_cpu(cal[i].add);
 587                 }
 588         }
 589
 590         /* sort the list by channel frequency */
 591         sort(entry, entries, sizeof(*entry), p54_compare_rssichan, NULL);
 592         return 0;
 593
 594 err_data:
 595         wiphy_err(dev->wiphy,
 596                   "rssi calibration data packing type:(%x) len:%d.\n",
 597                   type, len);
 598
 599         print_hex_dump_bytes("rssical:", DUMP_PREFIX_NONE, data, len);
 600
 601         wiphy_err(dev->wiphy, "please report this issue.\n");
 602         return -EINVAL;
 603 }
 604
 605 struct p54_rssi_db_entry *p54_rssi_find(struct p54_common *priv, const u16 freq)
 606 {
 607         struct p54_rssi_db_entry *entry;
 608         int i, found = -1;
 609
 610         if (!priv->rssi_db)
 611                 return &p54_rssi_default;
 612
 613         entry = (void *)(priv->rssi_db->data + priv->rssi_db->offset);
 614         for (i = 0; i < priv->rssi_db->entries; i++) {
 615                 if (!same_band(freq, entry[i].freq))
 616                         continue;
 617
 618                 if (found == -1) {
 619                         found = i;
 620                         continue;
 621                 }
 622
 623                 /* nearest match */
 624                 if (abs(freq - entry[i].freq) <
 625                     abs(freq - entry[found].freq)) {
 626                         found = i;
 627                         continue;
 628                 } else {
 629                         break;
 630                 }
 631         }
 632
 633         return found < 0 ? &p54_rssi_default : &entry[found];
 634 }
 635
 636 static void p54_parse_default_country(struct ieee80211_hw *dev,
 637                                       void *data, int len)
 638 {
 639         struct pda_country *country;
 640
 641         if (len != sizeof(*country)) {
 642                 wiphy_err(dev->wiphy,
 643                           "found possible invalid default country eeprom entry. (entry size: %d)\n",
 644                           len);
 645
 646                 print_hex_dump_bytes("country:", DUMP_PREFIX_NONE,
 647                                      data, len);
 648
 649                 wiphy_err(dev->wiphy, "please report this issue.\n");
 650                 return;
 651         }
 652
 653         country = (struct pda_country *) data;
 654         if (country->flags == PDR_COUNTRY_CERT_CODE_PSEUDO)
 655                 regulatory_hint(dev->wiphy, country->alpha2);
 656         else {
 657                 /* TODO:
 658                  * write a shared/common function that converts
 659                  * "Regulatory domain codes" (802.11-2007 14.8.2.2)
 660                  * into ISO/IEC 3166-1 alpha2 for regulatory_hint.
 661                  */
 662         }
 663 }
 664
 665 static int p54_convert_output_limits(struct ieee80211_hw *dev,
 666                                      u8 *data, size_t len)
 667 {
 668         struct p54_common *priv = dev->priv;
 669
 670         if (len < 2)
 671                 return -EINVAL;
 672
 673         if (data[0] != 0) {
 674                 wiphy_err(dev->wiphy, "unknown output power db revision:%x\n",
 675                           data[0]);
 676                 return -EINVAL;
 677         }
 678
 679         if (2 + data[1] * sizeof(struct pda_channel_output_limit) > len)
 680                 return -EINVAL;
 681
 682         priv->output_limit = kmalloc(data[1] *
 683                 sizeof(struct pda_channel_output_limit) +
 684                 sizeof(*priv->output_limit), GFP_KERNEL);
 685
 686         if (!priv->output_limit)
 687                 return -ENOMEM;
 688
 689         priv->output_limit->offset = 0;
 690         priv->output_limit->entries = data[1];
 691         priv->output_limit->entry_size =
 692                 sizeof(struct pda_channel_output_limit);
 693         priv->output_limit->len = priv->output_limit->entry_size *
 694                                   priv->output_limit->entries +
 695                                   priv->output_limit->offset;
 696
 697         memcpy(priv->output_limit->data, &data[2],
 698                data[1] * sizeof(struct pda_channel_output_limit));
 699
 700         return 0;
 701 }
 702
 703 static struct p54_cal_database *p54_convert_db(struct pda_custom_wrapper *src,
 704                                                size_t total_len)
 705 {
 706         struct p54_cal_database *dst;
 707         size_t payload_len, entries, entry_size, offset;
 708
 709         payload_len = le16_to_cpu(src->len);
 710         entries = le16_to_cpu(src->entries);
 711         entry_size = le16_to_cpu(src->entry_size);
 712         offset = le16_to_cpu(src->offset);
 713         if (((entries * entry_size + offset) != payload_len) ||
 714              (payload_len + sizeof(*src) != total_len))
 715                 return NULL;
 716
 717         dst = kmalloc(sizeof(*dst) + payload_len, GFP_KERNEL);
 718         if (!dst)
 719                 return NULL;
 720
 721         dst->entries = entries;
 722         dst->entry_size = entry_size;
 723         dst->offset = offset;
 724         dst->len = payload_len;
 725
 726         memcpy(dst->data, src->data, payload_len);
 727         return dst;
 728 }
 729
 730 int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
 731 {
 732         struct p54_common *priv = dev->priv;
 733         struct eeprom_pda_wrap *wrap;
 734         struct pda_entry *entry;
 735         unsigned int data_len, entry_len;
 736         void *tmp;
 737         int err;
 738         u8 *end = (u8 *)eeprom + len;
 739         u16 synth = 0;
 740         u16 crc16 = ~0;
 741
 742         wrap = (struct eeprom_pda_wrap *) eeprom;
 743         entry = (void *)wrap->data + le16_to_cpu(wrap->len);
 744
 745         /* verify that at least the entry length/code fits */
 746         while ((u8 *)entry <= end - sizeof(*entry)) {
 747                 entry_len = le16_to_cpu(entry->len);
 748                 data_len = ((entry_len - 1) << 1);
 749
 750                 /* abort if entry exceeds whole structure */
 751                 if ((u8 *)entry + sizeof(*entry) + data_len > end)
 752                         break;
 753
 754                 switch (le16_to_cpu(entry->code)) {
 755                 case PDR_MAC_ADDRESS:
 756                         if (data_len != ETH_ALEN)
 757                                 break;
 758                         SET_IEEE80211_PERM_ADDR(dev, entry->data);
 759                         break;
 760                 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS:
 761                         if (priv->output_limit)
 762                                 break;
 763                         err = p54_convert_output_limits(dev, entry->data,
 764                                                         data_len);
 765                         if (err)
 766                                 goto err;
 767                         break;
 768                 case PDR_PRISM_PA_CAL_CURVE_DATA: {
 769                         struct pda_pa_curve_data *curve_data =
 770                                 (struct pda_pa_curve_data *)entry->data;
 771                         if (data_len < sizeof(*curve_data)) {
 772                                 err = -EINVAL;
 773                                 goto err;
 774                         }
 775
 776                         switch (curve_data->cal_method_rev) {
 777                         case 0:
 778                                 err = p54_convert_rev0(dev, curve_data);
 779                                 break;
 780                         case 1:
 781                                 err = p54_convert_rev1(dev, curve_data);
 782                                 break;
 783                         default:
 784                                 wiphy_err(dev->wiphy,
 785                                           "unknown curve data revision %d\n",
 786                                           curve_data->cal_method_rev);
 787                                 err = -ENODEV;
 788                                 break;
 789                         }
 790                         if (err)
 791                                 goto err;
 792                         }
 793                         break;
 794                 case PDR_PRISM_ZIF_TX_IQ_CALIBRATION:
 795                         priv->iq_autocal = kmemdup(entry->data, data_len,
 796                                                    GFP_KERNEL);
 797                         if (!priv->iq_autocal) {
 798                                 err = -ENOMEM;
 799                                 goto err;
 800                         }
 801
 802                         priv->iq_autocal_len = data_len / sizeof(struct pda_iq_autocal_entry);
 803                         break;
 804                 case PDR_DEFAULT_COUNTRY:
 805                         p54_parse_default_country(dev, entry->data, data_len);
 806                         break;
 807                 case PDR_INTERFACE_LIST:
 808                         tmp = entry->data;
 809                         while ((u8 *)tmp < entry->data + data_len) {
 810                                 struct exp_if *exp_if = tmp;
 811                                 if (exp_if->if_id == cpu_to_le16(IF_ID_ISL39000))
 812                                         synth = le16_to_cpu(exp_if->variant);
 813                                 tmp += sizeof(*exp_if);
 814                         }
 815                         break;
 816                 case PDR_HARDWARE_PLATFORM_COMPONENT_ID:
 817                         if (data_len < 2)
 818                                 break;
 819                         priv->version = *(u8 *)(entry->data + 1);
 820                         break;
 821                 case PDR_RSSI_LINEAR_APPROXIMATION:
 822                 case PDR_RSSI_LINEAR_APPROXIMATION_DUAL_BAND:
 823                 case PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED:
 824                         err = p54_parse_rssical(dev, entry->data, data_len,
 825                                                 le16_to_cpu(entry->code));
 826                         if (err)
 827                                 goto err;
 828                         break;
 829                 case PDR_RSSI_LINEAR_APPROXIMATION_CUSTOMV2: {
 830                         struct pda_custom_wrapper *pda = (void *) entry->data;
 831                         __le16 *src;
 832                         u16 *dst;
 833                         int i;
 834
 835                         if (priv->rssi_db || data_len < sizeof(*pda))
 836                                 break;
 837
 838                         priv->rssi_db = p54_convert_db(pda, data_len);
 839                         if (!priv->rssi_db)
 840                                 break;
 841
 842                         src = (void *) priv->rssi_db->data;
 843                         dst = (void *) priv->rssi_db->data;
 844
 845                         for (i = 0; i < priv->rssi_db->entries; i++)
 846                                 *(dst++) = (s16) le16_to_cpu(*(src++));
 847
 848                         }
 849                         break;
 850                 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS_CUSTOM: {
 851                         struct pda_custom_wrapper *pda = (void *) entry->data;
 852                         if (priv->output_limit || data_len < sizeof(*pda))
 853                                 break;
 854                         priv->output_limit = p54_convert_db(pda, data_len);
 855                         }
 856                         break;
 857                 case PDR_PRISM_PA_CAL_CURVE_DATA_CUSTOM: {
 858                         struct pda_custom_wrapper *pda = (void *) entry->data;
 859                         if (priv->curve_data || data_len < sizeof(*pda))
 860                                 break;
 861                         priv->curve_data = p54_convert_db(pda, data_len);
 862                         }
 863                         break;
 864                 case PDR_END:
 865                         crc16 = ~crc_ccitt(crc16, (u8 *) entry, sizeof(*entry));
 866                         if (crc16 != le16_to_cpup((__le16 *)entry->data)) {
 867                                 wiphy_err(dev->wiphy, "eeprom failed checksum "
 868                                          "test!\n");
 869                                 err = -ENOMSG;
 870                                 goto err;
 871                         } else {
 872                                 goto good_eeprom;
 873                         }
 874                         break;
 875                 default:
 876                         break;
 877                 }
 878
 879                 crc16 = crc_ccitt(crc16, (u8 *)entry, (entry_len + 1) * 2);
 880                 entry = (void *)entry + (entry_len + 1) * 2;
 881         }
 882
 883         wiphy_err(dev->wiphy, "unexpected end of eeprom data.\n");
 884         err = -ENODATA;
 885         goto err;
 886
 887 good_eeprom:
 888         if (!synth || !priv->iq_autocal || !priv->output_limit ||
 889             !priv->curve_data) {
 890                 wiphy_err(dev->wiphy,
 891                           "not all required entries found in eeprom!\n");
 892                 err = -EINVAL;
 893                 goto err;
 894         }
 895
 896         priv->rxhw = synth & PDR_SYNTH_FRONTEND_MASK;
 897
 898         err = p54_generate_channel_lists(dev);
 899         if (err)
 900                 goto err;
 901
 902         if (priv->rxhw == PDR_SYNTH_FRONTEND_XBOW)
 903                 p54_init_xbow_synth(priv);
 904         if (!(synth & PDR_SYNTH_24_GHZ_DISABLED))
 905                 dev->wiphy->bands[IEEE80211_BAND_2GHZ] =
 906                         priv->band_table[IEEE80211_BAND_2GHZ];
 907         if (!(synth & PDR_SYNTH_5_GHZ_DISABLED))
 908                 dev->wiphy->bands[IEEE80211_BAND_5GHZ] =
 909                         priv->band_table[IEEE80211_BAND_5GHZ];
 910         if ((synth & PDR_SYNTH_RX_DIV_MASK) == PDR_SYNTH_RX_DIV_SUPPORTED)
 911                 priv->rx_diversity_mask = 3;
 912         if ((synth & PDR_SYNTH_TX_DIV_MASK) == PDR_SYNTH_TX_DIV_SUPPORTED)
 913                 priv->tx_diversity_mask = 3;
 914
 915         if (!is_valid_ether_addr(dev->wiphy->perm_addr)) {
 916                 u8 perm_addr[ETH_ALEN];
 917
 918                 wiphy_warn(dev->wiphy,
 919                            "Invalid hwaddr! Using randomly generated MAC addr\n");
 920                 eth_random_addr(perm_addr);
 921                 SET_IEEE80211_PERM_ADDR(dev, perm_addr);
 922         }
 923
 924         priv->cur_rssi = &p54_rssi_default;
 925
 926         wiphy_info(dev->wiphy, "hwaddr %pM, MAC:isl38%02x RF:%s\n",
 927                    dev->wiphy->perm_addr, priv->version,
 928                    p54_rf_chips[priv->rxhw]);
 929
 930         return 0;
 931
 932 err:
 933         kfree(priv->iq_autocal);
 934         kfree(priv->output_limit);
 935         kfree(priv->curve_data);
 936         kfree(priv->rssi_db);
 937         kfree(priv->survey);
 938         priv->iq_autocal = NULL;
 939         priv->output_limit = NULL;
 940         priv->curve_data = NULL;
 941         priv->rssi_db = NULL;
 942         priv->survey = NULL;
 943
 944         wiphy_err(dev->wiphy, "eeprom parse failed!\n");
 945         return err;
 946 }
 947 EXPORT_SYMBOL_GPL(p54_parse_eeprom);
 948
 949 int p54_read_eeprom(struct ieee80211_hw *dev)
 950 {
 951         struct p54_common *priv = dev->priv;
 952         size_t eeprom_size = 0x2020, offset = 0, blocksize, maxblocksize;
 953         int ret = -ENOMEM;
 954         void *eeprom;
 955
 956         maxblocksize = EEPROM_READBACK_LEN;
 957         if (priv->fw_var >= 0x509)
 958                 maxblocksize -= 0xc;
 959         else
 960                 maxblocksize -= 0x4;
 961
 962         eeprom = kzalloc(eeprom_size, GFP_KERNEL);
 963         if (unlikely(!eeprom))
 964                 goto free;
 965
 966         while (eeprom_size) {
 967                 blocksize = min(eeprom_size, maxblocksize);
 968                 ret = p54_download_eeprom(priv, eeprom + offset,
 969                                           offset, blocksize);
 970                 if (unlikely(ret))
 971                         goto free;
 972
 973                 offset += blocksize;
 974                 eeprom_size -= blocksize;
 975         }
 976
 977         ret = p54_parse_eeprom(dev, eeprom, offset);
 978 free:
 979         kfree(eeprom);
 980         return ret;
 981 }
 982 EXPORT_SYMBOL_GPL(p54_read_eeprom);