drivers/net/wireless/intersil/p54/eeprom.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * EEPROM parser code for mac80211 Prism54 drivers
   4  *
   5  * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
   6  * Copyright (c) 2007-2009, Christian Lamparter <chunkeey@web.de>
   7  * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
   8  *
   9  * Based on:
  10  * - the islsm (softmac prism54) driver, which is:
  11  *   Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
  12  * - stlc45xx driver
  13  *   Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
  14  */
  15
  16 #include <linux/firmware.h>
  17 #include <linux/etherdevice.h>
  18 #include <linux/sort.h>
  19 #include <linux/slab.h>
  20
  21 #include <net/mac80211.h>
  22 #include <linux/crc-ccitt.h>
  23 #include <linux/export.h>
  24
  25 #include "p54.h"
  26 #include "eeprom.h"
  27 #include "lmac.h"
  28
  29 static struct ieee80211_rate p54_bgrates[] = {
  30         { .bitrate = 10, .hw_value = 0, },
  31         { .bitrate = 20, .hw_value = 1, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  32         { .bitrate = 55, .hw_value = 2, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  33         { .bitrate = 110, .hw_value = 3, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  34         { .bitrate = 60, .hw_value = 4, },
  35         { .bitrate = 90, .hw_value = 5, },
  36         { .bitrate = 120, .hw_value = 6, },
  37         { .bitrate = 180, .hw_value = 7, },
  38         { .bitrate = 240, .hw_value = 8, },
  39         { .bitrate = 360, .hw_value = 9, },
  40         { .bitrate = 480, .hw_value = 10, },
  41         { .bitrate = 540, .hw_value = 11, },
  42 };
  43
  44 static struct ieee80211_rate p54_arates[] = {
  45         { .bitrate = 60, .hw_value = 4, },
  46         { .bitrate = 90, .hw_value = 5, },
  47         { .bitrate = 120, .hw_value = 6, },
  48         { .bitrate = 180, .hw_value = 7, },
  49         { .bitrate = 240, .hw_value = 8, },
  50         { .bitrate = 360, .hw_value = 9, },
  51         { .bitrate = 480, .hw_value = 10, },
  52         { .bitrate = 540, .hw_value = 11, },
  53 };
  54
  55 static struct p54_rssi_db_entry p54_rssi_default = {
  56         /*
  57          * The defaults are taken from usb-logs of the
  58          * vendor driver. So, they should be safe to
  59          * use in case we can't get a match from the
  60          * rssi <-> dBm conversion database.
  61          */
  62         .mul = 130,
  63         .add = -398,
  64 };
  65
  66 #define CHAN_HAS_CAL            BIT(0)
  67 #define CHAN_HAS_LIMIT          BIT(1)
  68 #define CHAN_HAS_CURVE          BIT(2)
  69 #define CHAN_HAS_ALL            (CHAN_HAS_CAL | CHAN_HAS_LIMIT | CHAN_HAS_CURVE)
  70
  71 struct p54_channel_entry {
  72         u16 freq;
  73         u16 data;
  74         int index;
  75         int max_power;
  76         enum nl80211_band band;
  77 };
  78
  79 struct p54_channel_list {
  80         struct p54_channel_entry *channels;
  81         size_t entries;
  82         size_t max_entries;
  83         size_t band_channel_num[NUM_NL80211_BANDS];
  84 };
  85
  86 static int p54_get_band_from_freq(u16 freq)
  87 {
  88         /* FIXME: sync these values with the 802.11 spec */
  89
  90         if ((freq >= 2412) && (freq <= 2484))
  91                 return NL80211_BAND_2GHZ;
  92
  93         if ((freq >= 4920) && (freq <= 5825))
  94                 return NL80211_BAND_5GHZ;
  95
  96         return -1;
  97 }
  98
  99 static int same_band(u16 freq, u16 freq2)
 100 {
 101         return p54_get_band_from_freq(freq) == p54_get_band_from_freq(freq2);
 102 }
 103
 104 static int p54_compare_channels(const void *_a,
 105                                 const void *_b)
 106 {
 107         const struct p54_channel_entry *a = _a;
 108         const struct p54_channel_entry *b = _b;
 109
 110         return a->freq - b->freq;
 111 }
 112
 113 static int p54_compare_rssichan(const void *_a,
 114                                 const void *_b)
 115 {
 116         const struct p54_rssi_db_entry *a = _a;
 117         const struct p54_rssi_db_entry *b = _b;
 118
 119         return a->freq - b->freq;
 120 }
 121
 122 static int p54_fill_band_bitrates(struct ieee80211_hw *dev,
 123                                   struct ieee80211_supported_band *band_entry,
 124                                   enum nl80211_band band)
 125 {
 126         /* TODO: generate rate array dynamically */
 127
 128         switch (band) {
 129         case NL80211_BAND_2GHZ:
 130                 band_entry->bitrates = p54_bgrates;
 131                 band_entry->n_bitrates = ARRAY_SIZE(p54_bgrates);
 132                 break;
 133         case NL80211_BAND_5GHZ:
 134                 band_entry->bitrates = p54_arates;
 135                 band_entry->n_bitrates = ARRAY_SIZE(p54_arates);
 136                 break;
 137         default:
 138                 return -EINVAL;
 139         }
 140
 141         return 0;
 142 }
 143
 144 static int p54_generate_band(struct ieee80211_hw *dev,
 145                              struct p54_channel_list *list,
 146                              unsigned int *chan_num,
 147                              enum nl80211_band band)
 148 {
 149         struct p54_common *priv = dev->priv;
 150         struct ieee80211_supported_band *tmp, *old;
 151         unsigned int i, j;
 152         int ret = -ENOMEM;
 153
 154         if ((!list->entries) || (!list->band_channel_num[band]))
 155                 return -EINVAL;
 156
 157         tmp = kzalloc(sizeof(*tmp), GFP_KERNEL);
 158         if (!tmp)
 159                 goto err_out;
 160
 161         tmp->channels = kcalloc(list->band_channel_num[band],
 162                                 sizeof(struct ieee80211_channel),
 163                                 GFP_KERNEL);
 164         if (!tmp->channels)
 165                 goto err_out;
 166
 167         ret = p54_fill_band_bitrates(dev, tmp, band);
 168         if (ret)
 169                 goto err_out;
 170
 171         for (i = 0, j = 0; (j < list->band_channel_num[band]) &&
 172                            (i < list->entries); i++) {
 173                 struct p54_channel_entry *chan = &list->channels[i];
 174                 struct ieee80211_channel *dest = &tmp->channels[j];
 175
 176                 if (chan->band != band)
 177                         continue;
 178
 179                 if (chan->data != CHAN_HAS_ALL) {
 180                         wiphy_err(dev->wiphy, "%s%s%s is/are missing for "
 181                                   "channel:%d [%d MHz].\n",
 182                                   (chan->data & CHAN_HAS_CAL ? "" :
 183                                    " [iqauto calibration data]"),
 184                                   (chan->data & CHAN_HAS_LIMIT ? "" :
 185                                    " [output power limits]"),
 186                                   (chan->data & CHAN_HAS_CURVE ? "" :
 187                                    " [curve data]"),
 188                                   chan->index, chan->freq);
 189                         continue;
 190                 }
 191
 192                 dest->band = chan->band;
 193                 dest->center_freq = chan->freq;
 194                 dest->max_power = chan->max_power;
 195                 priv->survey[*chan_num].channel = &tmp->channels[j];
 196                 priv->survey[*chan_num].filled = SURVEY_INFO_NOISE_DBM |
 197                         SURVEY_INFO_TIME |
 198                         SURVEY_INFO_TIME_BUSY |
 199                         SURVEY_INFO_TIME_TX;
 200                 dest->hw_value = (*chan_num);
 201                 j++;
 202                 (*chan_num)++;
 203         }
 204
 205         if (j == 0) {
 206                 wiphy_err(dev->wiphy, "Disabling totally damaged %d GHz band\n",
 207                           (band == NL80211_BAND_2GHZ) ? 2 : 5);
 208
 209                 ret = -ENODATA;
 210                 goto err_out;
 211         }
 212
 213         tmp->n_channels = j;
 214         old = priv->band_table[band];
 215         priv->band_table[band] = tmp;
 216         if (old) {
 217                 kfree(old->channels);
 218                 kfree(old);
 219         }
 220
 221         return 0;
 222
 223 err_out:
 224         if (tmp) {
 225                 kfree(tmp->channels);
 226                 kfree(tmp);
 227         }
 228
 229         return ret;
 230 }
 231
 232 static struct p54_channel_entry *p54_update_channel_param(struct p54_channel_list *list,
 233                                                           u16 freq, u16 data)
 234 {
 235         int i;
 236         struct p54_channel_entry *entry = NULL;
 237
 238         /*
 239          * usually all lists in the eeprom are mostly sorted.
 240          * so it's very likely that the entry we are looking for
 241          * is right at the end of the list
 242          */
 243         for (i = list->entries; i >= 0; i--) {
 244                 if (freq == list->channels[i].freq) {
 245                         entry = &list->channels[i];
 246                         break;
 247                 }
 248         }
 249
 250         if ((i < 0) && (list->entries < list->max_entries)) {
 251                 /* entry does not exist yet. Initialize a new one. */
 252                 int band = p54_get_band_from_freq(freq);
 253
 254                 /*
 255                  * filter out frequencies which don't belong into
 256                  * any supported band.
 257                  */
 258                 if (band >= 0) {
 259                         i = list->entries++;
 260                         list->band_channel_num[band]++;
 261
 262                         entry = &list->channels[i];
 263                         entry->freq = freq;
 264                         entry->band = band;
 265                         entry->index = ieee80211_frequency_to_channel(freq);
 266                         entry->max_power = 0;
 267                         entry->data = 0;
 268                 }
 269         }
 270
 271         if (entry)
 272                 entry->data |= data;
 273
 274         return entry;
 275 }
 276
 277 static int p54_get_maxpower(struct p54_common *priv, void *data)
 278 {
 279         switch (priv->rxhw & PDR_SYNTH_FRONTEND_MASK) {
 280         case PDR_SYNTH_FRONTEND_LONGBOW: {
 281                 struct pda_channel_output_limit_longbow *pda = data;
 282                 int j;
 283                 u16 rawpower = 0;
 284                 pda = data;
 285                 for (j = 0; j < ARRAY_SIZE(pda->point); j++) {
 286                         struct pda_channel_output_limit_point_longbow *point =
 287                                 &pda->point[j];
 288                         rawpower = max_t(u16,
 289                                 rawpower, le16_to_cpu(point->val_qpsk));
 290                         rawpower = max_t(u16,
 291                                 rawpower, le16_to_cpu(point->val_bpsk));
 292                         rawpower = max_t(u16,
 293                                 rawpower, le16_to_cpu(point->val_16qam));
 294                         rawpower = max_t(u16,
 295                                 rawpower, le16_to_cpu(point->val_64qam));
 296                 }
 297                 /* longbow seems to use 1/16 dBm units */
 298                 return rawpower / 16;
 299                 }
 300
 301         case PDR_SYNTH_FRONTEND_DUETTE3:
 302         case PDR_SYNTH_FRONTEND_DUETTE2:
 303         case PDR_SYNTH_FRONTEND_FRISBEE:
 304         case PDR_SYNTH_FRONTEND_XBOW: {
 305                 struct pda_channel_output_limit *pda = data;
 306                 u8 rawpower = 0;
 307                 rawpower = max(rawpower, pda->val_qpsk);
 308                 rawpower = max(rawpower, pda->val_bpsk);
 309                 rawpower = max(rawpower, pda->val_16qam);
 310                 rawpower = max(rawpower, pda->val_64qam);
 311                 /* raw values are in 1/4 dBm units */
 312                 return rawpower / 4;
 313                 }
 314
 315         default:
 316                 return 20;
 317         }
 318 }
 319
 320 static int p54_generate_channel_lists(struct ieee80211_hw *dev)
 321 {
 322         struct p54_common *priv = dev->priv;
 323         struct p54_channel_list *list;
 324         unsigned int i, j, k, max_channel_num;
 325         int ret = 0;
 326         u16 freq;
 327
 328         if ((priv->iq_autocal_len != priv->curve_data->entries) ||
 329             (priv->iq_autocal_len != priv->output_limit->entries))
 330                 wiphy_err(dev->wiphy,
 331                           "Unsupported or damaged EEPROM detected. "
 332                           "You may not be able to use all channels.\n");
 333
 334         max_channel_num = max_t(unsigned int, priv->output_limit->entries,
 335                                 priv->iq_autocal_len);
 336         max_channel_num = max_t(unsigned int, max_channel_num,
 337                                 priv->curve_data->entries);
 338
 339         list = kzalloc(sizeof(*list), GFP_KERNEL);
 340         if (!list) {
 341                 ret = -ENOMEM;
 342                 goto free;
 343         }
 344         priv->chan_num = max_channel_num;
 345         priv->survey = kcalloc(max_channel_num, sizeof(struct survey_info),
 346                                GFP_KERNEL);
 347         if (!priv->survey) {
 348                 ret = -ENOMEM;
 349                 goto free;
 350         }
 351
 352         list->max_entries = max_channel_num;
 353         list->channels = kcalloc(max_channel_num,
 354                                  sizeof(struct p54_channel_entry),
 355                                  GFP_KERNEL);
 356         if (!list->channels) {
 357                 ret = -ENOMEM;
 358                 goto free;
 359         }
 360
 361         for (i = 0; i < max_channel_num; i++) {
 362                 if (i < priv->iq_autocal_len) {
 363                         freq = le16_to_cpu(priv->iq_autocal[i].freq);
 364                         p54_update_channel_param(list, freq, CHAN_HAS_CAL);
 365                 }
 366
 367                 if (i < priv->output_limit->entries) {
 368                         struct p54_channel_entry *tmp;
 369
 370                         void *data = (void *) ((unsigned long) i *
 371                                 priv->output_limit->entry_size +
 372                                 priv->output_limit->offset +
 373                                 priv->output_limit->data);
 374
 375                         freq = le16_to_cpup((__le16 *) data);
 376                         tmp = p54_update_channel_param(list, freq,
 377                                                        CHAN_HAS_LIMIT);
 378                         if (tmp) {
 379                                 tmp->max_power = p54_get_maxpower(priv, data);
 380                         }
 381                 }
 382
 383                 if (i < priv->curve_data->entries) {
 384                         freq = le16_to_cpup((__le16 *) (i *
 385                                             priv->curve_data->entry_size +
 386                                             priv->curve_data->offset +
 387                                             priv->curve_data->data));
 388
 389                         p54_update_channel_param(list, freq, CHAN_HAS_CURVE);
 390                 }
 391         }
 392
 393         /* sort the channel list by frequency */
 394         sort(list->channels, list->entries, sizeof(struct p54_channel_entry),
 395              p54_compare_channels, NULL);
 396
 397         k = 0;
 398         for (i = 0, j = 0; i < NUM_NL80211_BANDS; i++) {
 399                 if (p54_generate_band(dev, list, &k, i) == 0)
 400                         j++;
 401         }
 402         if (j == 0) {
 403                 /* no useable band available. */
 404                 ret = -EINVAL;
 405         }
 406
 407 free:
 408         if (list) {
 409                 kfree(list->channels);
 410                 kfree(list);
 411         }
 412         if (ret) {
 413                 kfree(priv->survey);
 414                 priv->survey = NULL;
 415         }
 416
 417         return ret;
 418 }
 419
 420 static int p54_convert_rev0(struct ieee80211_hw *dev,
 421                             struct pda_pa_curve_data *curve_data)
 422 {
 423         struct p54_common *priv = dev->priv;
 424         struct p54_pa_curve_data_sample *dst;
 425         struct pda_pa_curve_data_sample_rev0 *src;
 426         size_t cd_len = sizeof(*curve_data) +
 427                 (curve_data->points_per_channel*sizeof(*dst) + 2) *
 428                  curve_data->channels;
 429         unsigned int i, j;
 430         void *source, *target;
 431
 432         priv->curve_data = kmalloc(sizeof(*priv->curve_data) + cd_len,
 433                                    GFP_KERNEL);
 434         if (!priv->curve_data)
 435                 return -ENOMEM;
 436
 437         priv->curve_data->entries = curve_data->channels;
 438         priv->curve_data->entry_size = sizeof(__le16) +
 439                 sizeof(*dst) * curve_data->points_per_channel;
 440         priv->curve_data->offset = offsetof(struct pda_pa_curve_data, data);
 441         priv->curve_data->len = cd_len;
 442         memcpy(priv->curve_data->data, curve_data, sizeof(*curve_data));
 443         source = curve_data->data;
 444         target = ((struct pda_pa_curve_data *) priv->curve_data->data)->data;
 445         for (i = 0; i < curve_data->channels; i++) {
 446                 __le16 *freq = source;
 447                 source += sizeof(__le16);
 448                 *((__le16 *)target) = *freq;
 449                 target += sizeof(__le16);
 450                 for (j = 0; j < curve_data->points_per_channel; j++) {
 451                         dst = target;
 452                         src = source;
 453
 454                         dst->rf_power = src->rf_power;
 455                         dst->pa_detector = src->pa_detector;
 456                         dst->data_64qam = src->pcv;
 457                         /* "invent" the points for the other modulations */
 458 #define SUB(x, y) (u8)(((x) - (y)) > (x) ? 0 : (x) - (y))
 459                         dst->data_16qam = SUB(src->pcv, 12);
 460                         dst->data_qpsk = SUB(dst->data_16qam, 12);
 461                         dst->data_bpsk = SUB(dst->data_qpsk, 12);
 462                         dst->data_barker = SUB(dst->data_bpsk, 14);
 463 #undef SUB
 464                         target += sizeof(*dst);
 465                         source += sizeof(*src);
 466                 }
 467         }
 468
 469         return 0;
 470 }
 471
 472 static int p54_convert_rev1(struct ieee80211_hw *dev,
 473                             struct pda_pa_curve_data *curve_data)
 474 {
 475         struct p54_common *priv = dev->priv;
 476         struct p54_pa_curve_data_sample *dst;
 477         struct pda_pa_curve_data_sample_rev1 *src;
 478         size_t cd_len = sizeof(*curve_data) +
 479                 (curve_data->points_per_channel*sizeof(*dst) + 2) *
 480                  curve_data->channels;
 481         unsigned int i, j;
 482         void *source, *target;
 483
 484         priv->curve_data = kzalloc(cd_len + sizeof(*priv->curve_data),
 485                                    GFP_KERNEL);
 486         if (!priv->curve_data)
 487                 return -ENOMEM;
 488
 489         priv->curve_data->entries = curve_data->channels;
 490         priv->curve_data->entry_size = sizeof(__le16) +
 491                 sizeof(*dst) * curve_data->points_per_channel;
 492         priv->curve_data->offset = offsetof(struct pda_pa_curve_data, data);
 493         priv->curve_data->len = cd_len;
 494         memcpy(priv->curve_data->data, curve_data, sizeof(*curve_data));
 495         source = curve_data->data;
 496         target = ((struct pda_pa_curve_data *) priv->curve_data->data)->data;
 497         for (i = 0; i < curve_data->channels; i++) {
 498                 __le16 *freq = source;
 499                 source += sizeof(__le16);
 500                 *((__le16 *)target) = *freq;
 501                 target += sizeof(__le16);
 502                 for (j = 0; j < curve_data->points_per_channel; j++) {
 503                         memcpy(target, source, sizeof(*src));
 504
 505                         target += sizeof(*dst);
 506                         source += sizeof(*src);
 507                 }
 508                 source++;
 509         }
 510
 511         return 0;
 512 }
 513
 514 static const char *p54_rf_chips[] = { "INVALID-0", "Duette3", "Duette2",
 515         "Frisbee", "Xbow", "Longbow", "INVALID-6", "INVALID-7" };
 516
 517 static int p54_parse_rssical(struct ieee80211_hw *dev,
 518                              u8 *data, int len, u16 type)
 519 {
 520         struct p54_common *priv = dev->priv;
 521         struct p54_rssi_db_entry *entry;
 522         size_t db_len, entries;
 523         int offset = 0, i;
 524
 525         if (type != PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED) {
 526                 entries = (type == PDR_RSSI_LINEAR_APPROXIMATION) ? 1 : 2;
 527                 if (len != sizeof(struct pda_rssi_cal_entry) * entries) {
 528                         wiphy_err(dev->wiphy, "rssical size mismatch.\n");
 529                         goto err_data;
 530                 }
 531         } else {
 532                 /*
 533                  * Some devices (Dell 1450 USB, Xbow 5GHz card, etc...)
 534                  * have an empty two byte header.
 535                  */
 536                 if (*((__le16 *)&data[offset]) == cpu_to_le16(0))
 537                         offset += 2;
 538
 539                 entries = (len - offset) /
 540                         sizeof(struct pda_rssi_cal_ext_entry);
 541
 542                 if (len < offset ||
 543                     (len - offset) % sizeof(struct pda_rssi_cal_ext_entry) ||
 544                     entries == 0) {
 545                         wiphy_err(dev->wiphy, "invalid rssi database.\n");
 546                         goto err_data;
 547                 }
 548         }
 549
 550         db_len = sizeof(*entry) * entries;
 551         priv->rssi_db = kzalloc(db_len + sizeof(*priv->rssi_db), GFP_KERNEL);
 552         if (!priv->rssi_db)
 553                 return -ENOMEM;
 554
 555         priv->rssi_db->offset = 0;
 556         priv->rssi_db->entries = entries;
 557         priv->rssi_db->entry_size = sizeof(*entry);
 558         priv->rssi_db->len = db_len;
 559
 560         entry = (void *)((unsigned long)priv->rssi_db->data + priv->rssi_db->offset);
 561         if (type == PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED) {
 562                 struct pda_rssi_cal_ext_entry *cal = (void *) &data[offset];
 563
 564                 for (i = 0; i < entries; i++) {
 565                         entry[i].freq = le16_to_cpu(cal[i].freq);
 566                         entry[i].mul = (s16) le16_to_cpu(cal[i].mul);
 567                         entry[i].add = (s16) le16_to_cpu(cal[i].add);
 568                 }
 569         } else {
 570                 struct pda_rssi_cal_entry *cal = (void *) &data[offset];
 571
 572                 for (i = 0; i < entries; i++) {
 573                         u16 freq = 0;
 574                         switch (i) {
 575                         case NL80211_BAND_2GHZ:
 576                                 freq = 2437;
 577                                 break;
 578                         case NL80211_BAND_5GHZ:
 579                                 freq = 5240;
 580                                 break;
 581                         }
 582
 583                         entry[i].freq = freq;
 584                         entry[i].mul = (s16) le16_to_cpu(cal[i].mul);
 585                         entry[i].add = (s16) le16_to_cpu(cal[i].add);
 586                 }
 587         }
 588
 589         /* sort the list by channel frequency */
 590         sort(entry, entries, sizeof(*entry), p54_compare_rssichan, NULL);
 591         return 0;
 592
 593 err_data:
 594         wiphy_err(dev->wiphy,
 595                   "rssi calibration data packing type:(%x) len:%d.\n",
 596                   type, len);
 597
 598         print_hex_dump_bytes("rssical:", DUMP_PREFIX_NONE, data, len);
 599
 600         wiphy_err(dev->wiphy, "please report this issue.\n");
 601         return -EINVAL;
 602 }
 603
 604 struct p54_rssi_db_entry *p54_rssi_find(struct p54_common *priv, const u16 freq)
 605 {
 606         struct p54_rssi_db_entry *entry;
 607         int i, found = -1;
 608
 609         if (!priv->rssi_db)
 610                 return &p54_rssi_default;
 611
 612         entry = (void *)(priv->rssi_db->data + priv->rssi_db->offset);
 613         for (i = 0; i < priv->rssi_db->entries; i++) {
 614                 if (!same_band(freq, entry[i].freq))
 615                         continue;
 616
 617                 if (found == -1) {
 618                         found = i;
 619                         continue;
 620                 }
 621
 622                 /* nearest match */
 623                 if (abs(freq - entry[i].freq) <
 624                     abs(freq - entry[found].freq)) {
 625                         found = i;
 626                         continue;
 627                 } else {
 628                         break;
 629                 }
 630         }
 631
 632         return found < 0 ? &p54_rssi_default : &entry[found];
 633 }
 634
 635 static void p54_parse_default_country(struct ieee80211_hw *dev,
 636                                       void *data, int len)
 637 {
 638         struct pda_country *country;
 639
 640         if (len != sizeof(*country)) {
 641                 wiphy_err(dev->wiphy,
 642                           "found possible invalid default country eeprom entry. (entry size: %d)\n",
 643                           len);
 644
 645                 print_hex_dump_bytes("country:", DUMP_PREFIX_NONE,
 646                                      data, len);
 647
 648                 wiphy_err(dev->wiphy, "please report this issue.\n");
 649                 return;
 650         }
 651
 652         country = (struct pda_country *) data;
 653         if (country->flags == PDR_COUNTRY_CERT_CODE_PSEUDO)
 654                 regulatory_hint(dev->wiphy, country->alpha2);
 655         else {
 656                 /* TODO:
 657                  * write a shared/common function that converts
 658                  * "Regulatory domain codes" (802.11-2007 14.8.2.2)
 659                  * into ISO/IEC 3166-1 alpha2 for regulatory_hint.
 660                  */
 661         }
 662 }
 663
 664 static int p54_convert_output_limits(struct ieee80211_hw *dev,
 665                                      u8 *data, size_t len)
 666 {
 667         struct p54_common *priv = dev->priv;
 668
 669         if (len < 2)
 670                 return -EINVAL;
 671
 672         if (data[0] != 0) {
 673                 wiphy_err(dev->wiphy, "unknown output power db revision:%x\n",
 674                           data[0]);
 675                 return -EINVAL;
 676         }
 677
 678         if (2 + data[1] * sizeof(struct pda_channel_output_limit) > len)
 679                 return -EINVAL;
 680
 681         priv->output_limit = kmalloc(data[1] *
 682                 sizeof(struct pda_channel_output_limit) +
 683                 sizeof(*priv->output_limit), GFP_KERNEL);
 684
 685         if (!priv->output_limit)
 686                 return -ENOMEM;
 687
 688         priv->output_limit->offset = 0;
 689         priv->output_limit->entries = data[1];
 690         priv->output_limit->entry_size =
 691                 sizeof(struct pda_channel_output_limit);
 692         priv->output_limit->len = priv->output_limit->entry_size *
 693                                   priv->output_limit->entries +
 694                                   priv->output_limit->offset;
 695
 696         memcpy(priv->output_limit->data, &data[2],
 697                data[1] * sizeof(struct pda_channel_output_limit));
 698
 699         return 0;
 700 }
 701
 702 static struct p54_cal_database *p54_convert_db(struct pda_custom_wrapper *src,
 703                                                size_t total_len)
 704 {
 705         struct p54_cal_database *dst;
 706         size_t payload_len, entries, entry_size, offset;
 707
 708         payload_len = le16_to_cpu(src->len);
 709         entries = le16_to_cpu(src->entries);
 710         entry_size = le16_to_cpu(src->entry_size);
 711         offset = le16_to_cpu(src->offset);
 712         if (((entries * entry_size + offset) != payload_len) ||
 713              (payload_len + sizeof(*src) != total_len))
 714                 return NULL;
 715
 716         dst = kmalloc(sizeof(*dst) + payload_len, GFP_KERNEL);
 717         if (!dst)
 718                 return NULL;
 719
 720         dst->entries = entries;
 721         dst->entry_size = entry_size;
 722         dst->offset = offset;
 723         dst->len = payload_len;
 724
 725         memcpy(dst->data, src->data, payload_len);
 726         return dst;
 727 }
 728
 729 int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
 730 {
 731         struct p54_common *priv = dev->priv;
 732         struct eeprom_pda_wrap *wrap;
 733         struct pda_entry *entry;
 734         unsigned int data_len, entry_len;
 735         void *tmp;
 736         int err;
 737         u8 *end = (u8 *)eeprom + len;
 738         u16 synth = 0;
 739         u16 crc16 = ~0;
 740
 741         wrap = (struct eeprom_pda_wrap *) eeprom;
 742         entry = (void *)wrap->data + le16_to_cpu(wrap->len);
 743
 744         /* verify that at least the entry length/code fits */
 745         while ((u8 *)entry <= end - sizeof(*entry)) {
 746                 entry_len = le16_to_cpu(entry->len);
 747                 data_len = ((entry_len - 1) << 1);
 748
 749                 /* abort if entry exceeds whole structure */
 750                 if ((u8 *)entry + sizeof(*entry) + data_len > end)
 751                         break;
 752
 753                 switch (le16_to_cpu(entry->code)) {
 754                 case PDR_MAC_ADDRESS:
 755                         if (data_len != ETH_ALEN)
 756                                 break;
 757                         SET_IEEE80211_PERM_ADDR(dev, entry->data);
 758                         break;
 759                 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS:
 760                         if (priv->output_limit)
 761                                 break;
 762                         err = p54_convert_output_limits(dev, entry->data,
 763                                                         data_len);
 764                         if (err)
 765                                 goto err;
 766                         break;
 767                 case PDR_PRISM_PA_CAL_CURVE_DATA: {
 768                         struct pda_pa_curve_data *curve_data =
 769                                 (struct pda_pa_curve_data *)entry->data;
 770                         if (data_len < sizeof(*curve_data)) {
 771                                 err = -EINVAL;
 772                                 goto err;
 773                         }
 774
 775                         switch (curve_data->cal_method_rev) {
 776                         case 0:
 777                                 err = p54_convert_rev0(dev, curve_data);
 778                                 break;
 779                         case 1:
 780                                 err = p54_convert_rev1(dev, curve_data);
 781                                 break;
 782                         default:
 783                                 wiphy_err(dev->wiphy,
 784                                           "unknown curve data revision %d\n",
 785                                           curve_data->cal_method_rev);
 786                                 err = -ENODEV;
 787                                 break;
 788                         }
 789                         if (err)
 790                                 goto err;
 791                         }
 792                         break;
 793                 case PDR_PRISM_ZIF_TX_IQ_CALIBRATION:
 794                         priv->iq_autocal = kmemdup(entry->data, data_len,
 795                                                    GFP_KERNEL);
 796                         if (!priv->iq_autocal) {
 797                                 err = -ENOMEM;
 798                                 goto err;
 799                         }
 800
 801                         priv->iq_autocal_len = data_len / sizeof(struct pda_iq_autocal_entry);
 802                         break;
 803                 case PDR_DEFAULT_COUNTRY:
 804                         p54_parse_default_country(dev, entry->data, data_len);
 805                         break;
 806                 case PDR_INTERFACE_LIST:
 807                         tmp = entry->data;
 808                         while ((u8 *)tmp < entry->data + data_len) {
 809                                 struct exp_if *exp_if = tmp;
 810                                 if (exp_if->if_id == cpu_to_le16(IF_ID_ISL39000))
 811                                         synth = le16_to_cpu(exp_if->variant);
 812                                 tmp += sizeof(*exp_if);
 813                         }
 814                         break;
 815                 case PDR_HARDWARE_PLATFORM_COMPONENT_ID:
 816                         if (data_len < 2)
 817                                 break;
 818                         priv->version = *(u8 *)(entry->data + 1);
 819                         break;
 820                 case PDR_RSSI_LINEAR_APPROXIMATION:
 821                 case PDR_RSSI_LINEAR_APPROXIMATION_DUAL_BAND:
 822                 case PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED:
 823                         err = p54_parse_rssical(dev, entry->data, data_len,
 824                                                 le16_to_cpu(entry->code));
 825                         if (err)
 826                                 goto err;
 827                         break;
 828                 case PDR_RSSI_LINEAR_APPROXIMATION_CUSTOMV2: {
 829                         struct pda_custom_wrapper *pda = (void *) entry->data;
 830                         __le16 *src;
 831                         u16 *dst;
 832                         int i;
 833
 834                         if (priv->rssi_db || data_len < sizeof(*pda))
 835                                 break;
 836
 837                         priv->rssi_db = p54_convert_db(pda, data_len);
 838                         if (!priv->rssi_db)
 839                                 break;
 840
 841                         src = (void *) priv->rssi_db->data;
 842                         dst = (void *) priv->rssi_db->data;
 843
 844                         for (i = 0; i < priv->rssi_db->entries; i++)
 845                                 *(dst++) = (s16) le16_to_cpu(*(src++));
 846
 847                         }
 848                         break;
 849                 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS_CUSTOM: {
 850                         struct pda_custom_wrapper *pda = (void *) entry->data;
 851                         if (priv->output_limit || data_len < sizeof(*pda))
 852                                 break;
 853                         priv->output_limit = p54_convert_db(pda, data_len);
 854                         }
 855                         break;
 856                 case PDR_PRISM_PA_CAL_CURVE_DATA_CUSTOM: {
 857                         struct pda_custom_wrapper *pda = (void *) entry->data;
 858                         if (priv->curve_data || data_len < sizeof(*pda))
 859                                 break;
 860                         priv->curve_data = p54_convert_db(pda, data_len);
 861                         }
 862                         break;
 863                 case PDR_END:
 864                         crc16 = ~crc_ccitt(crc16, (u8 *) entry, sizeof(*entry));
 865                         if (crc16 != le16_to_cpup((__le16 *)entry->data)) {
 866                                 wiphy_err(dev->wiphy, "eeprom failed checksum "
 867                                          "test!\n");
 868                                 err = -ENOMSG;
 869                                 goto err;
 870                         } else {
 871                                 goto good_eeprom;
 872                         }
 873                         break;
 874                 default:
 875                         break;
 876                 }
 877
 878                 crc16 = crc_ccitt(crc16, (u8 *)entry, (entry_len + 1) * 2);
 879                 entry = (void *)entry + (entry_len + 1) * 2;
 880         }
 881
 882         wiphy_err(dev->wiphy, "unexpected end of eeprom data.\n");
 883         err = -ENODATA;
 884         goto err;
 885
 886 good_eeprom:
 887         if (!synth || !priv->iq_autocal || !priv->output_limit ||
 888             !priv->curve_data) {
 889                 wiphy_err(dev->wiphy,
 890                           "not all required entries found in eeprom!\n");
 891                 err = -EINVAL;
 892                 goto err;
 893         }
 894
 895         priv->rxhw = synth & PDR_SYNTH_FRONTEND_MASK;
 896
 897         err = p54_generate_channel_lists(dev);
 898         if (err)
 899                 goto err;
 900
 901         if (priv->rxhw == PDR_SYNTH_FRONTEND_XBOW)
 902                 p54_init_xbow_synth(priv);
 903         if (!(synth & PDR_SYNTH_24_GHZ_DISABLED))
 904                 dev->wiphy->bands[NL80211_BAND_2GHZ] =
 905                         priv->band_table[NL80211_BAND_2GHZ];
 906         if (!(synth & PDR_SYNTH_5_GHZ_DISABLED))
 907                 dev->wiphy->bands[NL80211_BAND_5GHZ] =
 908                         priv->band_table[NL80211_BAND_5GHZ];
 909         if ((synth & PDR_SYNTH_RX_DIV_MASK) == PDR_SYNTH_RX_DIV_SUPPORTED)
 910                 priv->rx_diversity_mask = 3;
 911         if ((synth & PDR_SYNTH_TX_DIV_MASK) == PDR_SYNTH_TX_DIV_SUPPORTED)
 912                 priv->tx_diversity_mask = 3;
 913
 914         if (!is_valid_ether_addr(dev->wiphy->perm_addr)) {
 915                 u8 perm_addr[ETH_ALEN];
 916
 917                 wiphy_warn(dev->wiphy,
 918                            "Invalid hwaddr! Using randomly generated MAC addr\n");
 919                 eth_random_addr(perm_addr);
 920                 SET_IEEE80211_PERM_ADDR(dev, perm_addr);
 921         }
 922
 923         priv->cur_rssi = &p54_rssi_default;
 924
 925         wiphy_info(dev->wiphy, "hwaddr %pM, MAC:isl38%02x RF:%s\n",
 926                    dev->wiphy->perm_addr, priv->version,
 927                    p54_rf_chips[priv->rxhw]);
 928
 929         return 0;
 930
 931 err:
 932         kfree(priv->iq_autocal);
 933         kfree(priv->output_limit);
 934         kfree(priv->curve_data);
 935         kfree(priv->rssi_db);
 936         kfree(priv->survey);
 937         priv->iq_autocal = NULL;
 938         priv->output_limit = NULL;
 939         priv->curve_data = NULL;
 940         priv->rssi_db = NULL;
 941         priv->survey = NULL;
 942
 943         wiphy_err(dev->wiphy, "eeprom parse failed!\n");
 944         return err;
 945 }
 946 EXPORT_SYMBOL_GPL(p54_parse_eeprom);
 947
 948 int p54_read_eeprom(struct ieee80211_hw *dev)
 949 {
 950         struct p54_common *priv = dev->priv;
 951         size_t eeprom_size = 0x2020, offset = 0, blocksize, maxblocksize;
 952         int ret = -ENOMEM;
 953         void *eeprom;
 954
 955         maxblocksize = EEPROM_READBACK_LEN;
 956         if (priv->fw_var >= 0x509)
 957                 maxblocksize -= 0xc;
 958         else
 959                 maxblocksize -= 0x4;
 960
 961         eeprom = kzalloc(eeprom_size, GFP_KERNEL);
 962         if (unlikely(!eeprom))
 963                 goto free;
 964
 965         while (eeprom_size) {
 966                 blocksize = min(eeprom_size, maxblocksize);
 967                 ret = p54_download_eeprom(priv, eeprom + offset,
 968                                           offset, blocksize);
 969                 if (unlikely(ret))
 970                         goto free;
 971
 972                 offset += blocksize;
 973                 eeprom_size -= blocksize;
 974         }
 975
 976         ret = p54_parse_eeprom(dev, eeprom, offset);
 977 free:
 978         kfree(eeprom);
 979         return ret;
 980 }
 981 EXPORT_SYMBOL_GPL(p54_read_eeprom);