drivers/net/wireless/intersil/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 nl80211_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[NUM_NL80211_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 NL80211_BAND_2GHZ;
  95
  96         if ((freq >= 4920) && (freq <= 5825))
  97                 return NL80211_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 nl80211_band band)
 128 {
 129         /* TODO: generate rate array dynamically */
 130
 131         switch (band) {
 132         case NL80211_BAND_2GHZ:
 133                 band_entry->bitrates = p54_bgrates;
 134                 band_entry->n_bitrates = ARRAY_SIZE(p54_bgrates);
 135                 break;
 136         case NL80211_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 nl80211_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 = kcalloc(list->band_channel_num[band],
 165                                 sizeof(struct ieee80211_channel),
 166                                 GFP_KERNEL);
 167         if (!tmp->channels)
 168                 goto err_out;
 169
 170         ret = p54_fill_band_bitrates(dev, tmp, band);
 171         if (ret)
 172                 goto err_out;
 173
 174         for (i = 0, j = 0; (j < list->band_channel_num[band]) &&
 175                            (i < list->entries); i++) {
 176                 struct p54_channel_entry *chan = &list->channels[i];
 177                 struct ieee80211_channel *dest = &tmp->channels[j];
 178
 179                 if (chan->band != band)
 180                         continue;
 181
 182                 if (chan->data != CHAN_HAS_ALL) {
 183                         wiphy_err(dev->wiphy, "%s%s%s is/are missing for "
 184                                   "channel:%d [%d MHz].\n",
 185                                   (chan->data & CHAN_HAS_CAL ? "" :
 186                                    " [iqauto calibration data]"),
 187                                   (chan->data & CHAN_HAS_LIMIT ? "" :
 188                                    " [output power limits]"),
 189                                   (chan->data & CHAN_HAS_CURVE ? "" :
 190                                    " [curve data]"),
 191                                   chan->index, chan->freq);
 192                         continue;
 193                 }
 194
 195                 dest->band = chan->band;
 196                 dest->center_freq = chan->freq;
 197                 dest->max_power = chan->max_power;
 198                 priv->survey[*chan_num].channel = &tmp->channels[j];
 199                 priv->survey[*chan_num].filled = SURVEY_INFO_NOISE_DBM |
 200                         SURVEY_INFO_TIME |
 201                         SURVEY_INFO_TIME_BUSY |
 202                         SURVEY_INFO_TIME_TX;
 203                 dest->hw_value = (*chan_num);
 204                 j++;
 205                 (*chan_num)++;
 206         }
 207
 208         if (j == 0) {
 209                 wiphy_err(dev->wiphy, "Disabling totally damaged %d GHz band\n",
 210                           (band == NL80211_BAND_2GHZ) ? 2 : 5);
 211
 212                 ret = -ENODATA;
 213                 goto err_out;
 214         }
 215
 216         tmp->n_channels = j;
 217         old = priv->band_table[band];
 218         priv->band_table[band] = tmp;
 219         if (old) {
 220                 kfree(old->channels);
 221                 kfree(old);
 222         }
 223
 224         return 0;
 225
 226 err_out:
 227         if (tmp) {
 228                 kfree(tmp->channels);
 229                 kfree(tmp);
 230         }
 231
 232         return ret;
 233 }
 234
 235 static struct p54_channel_entry *p54_update_channel_param(struct p54_channel_list *list,
 236                                                           u16 freq, u16 data)
 237 {
 238         int i;
 239         struct p54_channel_entry *entry = NULL;
 240
 241         /*
 242          * usually all lists in the eeprom are mostly sorted.
 243          * so it's very likely that the entry we are looking for
 244          * is right at the end of the list
 245          */
 246         for (i = list->entries; i >= 0; i--) {
 247                 if (freq == list->channels[i].freq) {
 248                         entry = &list->channels[i];
 249                         break;
 250                 }
 251         }
 252
 253         if ((i < 0) && (list->entries < list->max_entries)) {
 254                 /* entry does not exist yet. Initialize a new one. */
 255                 int band = p54_get_band_from_freq(freq);
 256
 257                 /*
 258                  * filter out frequencies which don't belong into
 259                  * any supported band.
 260                  */
 261                 if (band >= 0) {
 262                         i = list->entries++;
 263                         list->band_channel_num[band]++;
 264
 265                         entry = &list->channels[i];
 266                         entry->freq = freq;
 267                         entry->band = band;
 268                         entry->index = ieee80211_frequency_to_channel(freq);
 269                         entry->max_power = 0;
 270                         entry->data = 0;
 271                 }
 272         }
 273
 274         if (entry)
 275                 entry->data |= data;
 276
 277         return entry;
 278 }
 279
 280 static int p54_get_maxpower(struct p54_common *priv, void *data)
 281 {
 282         switch (priv->rxhw & PDR_SYNTH_FRONTEND_MASK) {
 283         case PDR_SYNTH_FRONTEND_LONGBOW: {
 284                 struct pda_channel_output_limit_longbow *pda = data;
 285                 int j;
 286                 u16 rawpower = 0;
 287                 pda = data;
 288                 for (j = 0; j < ARRAY_SIZE(pda->point); j++) {
 289                         struct pda_channel_output_limit_point_longbow *point =
 290                                 &pda->point[j];
 291                         rawpower = max_t(u16,
 292                                 rawpower, le16_to_cpu(point->val_qpsk));
 293                         rawpower = max_t(u16,
 294                                 rawpower, le16_to_cpu(point->val_bpsk));
 295                         rawpower = max_t(u16,
 296                                 rawpower, le16_to_cpu(point->val_16qam));
 297                         rawpower = max_t(u16,
 298                                 rawpower, le16_to_cpu(point->val_64qam));
 299                 }
 300                 /* longbow seems to use 1/16 dBm units */
 301                 return rawpower / 16;
 302                 }
 303
 304         case PDR_SYNTH_FRONTEND_DUETTE3:
 305         case PDR_SYNTH_FRONTEND_DUETTE2:
 306         case PDR_SYNTH_FRONTEND_FRISBEE:
 307         case PDR_SYNTH_FRONTEND_XBOW: {
 308                 struct pda_channel_output_limit *pda = data;
 309                 u8 rawpower = 0;
 310                 rawpower = max(rawpower, pda->val_qpsk);
 311                 rawpower = max(rawpower, pda->val_bpsk);
 312                 rawpower = max(rawpower, pda->val_16qam);
 313                 rawpower = max(rawpower, pda->val_64qam);
 314                 /* raw values are in 1/4 dBm units */
 315                 return rawpower / 4;
 316                 }
 317
 318         default:
 319                 return 20;
 320         }
 321 }
 322
 323 static int p54_generate_channel_lists(struct ieee80211_hw *dev)
 324 {
 325         struct p54_common *priv = dev->priv;
 326         struct p54_channel_list *list;
 327         unsigned int i, j, k, max_channel_num;
 328         int ret = 0;
 329         u16 freq;
 330
 331         if ((priv->iq_autocal_len != priv->curve_data->entries) ||
 332             (priv->iq_autocal_len != priv->output_limit->entries))
 333                 wiphy_err(dev->wiphy,
 334                           "Unsupported or damaged EEPROM detected. "
 335                           "You may not be able to use all channels.\n");
 336
 337         max_channel_num = max_t(unsigned int, priv->output_limit->entries,
 338                                 priv->iq_autocal_len);
 339         max_channel_num = max_t(unsigned int, max_channel_num,
 340                                 priv->curve_data->entries);
 341
 342         list = kzalloc(sizeof(*list), GFP_KERNEL);
 343         if (!list) {
 344                 ret = -ENOMEM;
 345                 goto free;
 346         }
 347         priv->chan_num = max_channel_num;
 348         priv->survey = kcalloc(max_channel_num, sizeof(struct survey_info),
 349                                GFP_KERNEL);
 350         if (!priv->survey) {
 351                 ret = -ENOMEM;
 352                 goto free;
 353         }
 354
 355         list->max_entries = max_channel_num;
 356         list->channels = kcalloc(max_channel_num,
 357                                  sizeof(struct p54_channel_entry),
 358                                  GFP_KERNEL);
 359         if (!list->channels) {
 360                 ret = -ENOMEM;
 361                 goto free;
 362         }
 363
 364         for (i = 0; i < max_channel_num; i++) {
 365                 if (i < priv->iq_autocal_len) {
 366                         freq = le16_to_cpu(priv->iq_autocal[i].freq);
 367                         p54_update_channel_param(list, freq, CHAN_HAS_CAL);
 368                 }
 369
 370                 if (i < priv->output_limit->entries) {
 371                         struct p54_channel_entry *tmp;
 372
 373                         void *data = (void *) ((unsigned long) i *
 374                                 priv->output_limit->entry_size +
 375                                 priv->output_limit->offset +
 376                                 priv->output_limit->data);
 377
 378                         freq = le16_to_cpup((__le16 *) data);
 379                         tmp = p54_update_channel_param(list, freq,
 380                                                        CHAN_HAS_LIMIT);
 381                         if (tmp) {
 382                                 tmp->max_power = p54_get_maxpower(priv, data);
 383                         }
 384                 }
 385
 386                 if (i < priv->curve_data->entries) {
 387                         freq = le16_to_cpup((__le16 *) (i *
 388                                             priv->curve_data->entry_size +
 389                                             priv->curve_data->offset +
 390                                             priv->curve_data->data));
 391
 392                         p54_update_channel_param(list, freq, CHAN_HAS_CURVE);
 393                 }
 394         }
 395
 396         /* sort the channel list by frequency */
 397         sort(list->channels, list->entries, sizeof(struct p54_channel_entry),
 398              p54_compare_channels, NULL);
 399
 400         k = 0;
 401         for (i = 0, j = 0; i < NUM_NL80211_BANDS; i++) {
 402                 if (p54_generate_band(dev, list, &k, i) == 0)
 403                         j++;
 404         }
 405         if (j == 0) {
 406                 /* no useable band available. */
 407                 ret = -EINVAL;
 408         }
 409
 410 free:
 411         if (list) {
 412                 kfree(list->channels);
 413                 kfree(list);
 414         }
 415         if (ret) {
 416                 kfree(priv->survey);
 417                 priv->survey = NULL;
 418         }
 419
 420         return ret;
 421 }
 422
 423 static int p54_convert_rev0(struct ieee80211_hw *dev,
 424                             struct pda_pa_curve_data *curve_data)
 425 {
 426         struct p54_common *priv = dev->priv;
 427         struct p54_pa_curve_data_sample *dst;
 428         struct pda_pa_curve_data_sample_rev0 *src;
 429         size_t cd_len = sizeof(*curve_data) +
 430                 (curve_data->points_per_channel*sizeof(*dst) + 2) *
 431                  curve_data->channels;
 432         unsigned int i, j;
 433         void *source, *target;
 434
 435         priv->curve_data = kmalloc(sizeof(*priv->curve_data) + cd_len,
 436                                    GFP_KERNEL);
 437         if (!priv->curve_data)
 438                 return -ENOMEM;
 439
 440         priv->curve_data->entries = curve_data->channels;
 441         priv->curve_data->entry_size = sizeof(__le16) +
 442                 sizeof(*dst) * curve_data->points_per_channel;
 443         priv->curve_data->offset = offsetof(struct pda_pa_curve_data, data);
 444         priv->curve_data->len = cd_len;
 445         memcpy(priv->curve_data->data, curve_data, sizeof(*curve_data));
 446         source = curve_data->data;
 447         target = ((struct pda_pa_curve_data *) priv->curve_data->data)->data;
 448         for (i = 0; i < curve_data->channels; i++) {
 449                 __le16 *freq = source;
 450                 source += sizeof(__le16);
 451                 *((__le16 *)target) = *freq;
 452                 target += sizeof(__le16);
 453                 for (j = 0; j < curve_data->points_per_channel; j++) {
 454                         dst = target;
 455                         src = source;
 456
 457                         dst->rf_power = src->rf_power;
 458                         dst->pa_detector = src->pa_detector;
 459                         dst->data_64qam = src->pcv;
 460                         /* "invent" the points for the other modulations */
 461 #define SUB(x, y) (u8)(((x) - (y)) > (x) ? 0 : (x) - (y))
 462                         dst->data_16qam = SUB(src->pcv, 12);
 463                         dst->data_qpsk = SUB(dst->data_16qam, 12);
 464                         dst->data_bpsk = SUB(dst->data_qpsk, 12);
 465                         dst->data_barker = SUB(dst->data_bpsk, 14);
 466 #undef SUB
 467                         target += sizeof(*dst);
 468                         source += sizeof(*src);
 469                 }
 470         }
 471
 472         return 0;
 473 }
 474
 475 static int p54_convert_rev1(struct ieee80211_hw *dev,
 476                             struct pda_pa_curve_data *curve_data)
 477 {
 478         struct p54_common *priv = dev->priv;
 479         struct p54_pa_curve_data_sample *dst;
 480         struct pda_pa_curve_data_sample_rev1 *src;
 481         size_t cd_len = sizeof(*curve_data) +
 482                 (curve_data->points_per_channel*sizeof(*dst) + 2) *
 483                  curve_data->channels;
 484         unsigned int i, j;
 485         void *source, *target;
 486
 487         priv->curve_data = kzalloc(cd_len + sizeof(*priv->curve_data),
 488                                    GFP_KERNEL);
 489         if (!priv->curve_data)
 490                 return -ENOMEM;
 491
 492         priv->curve_data->entries = curve_data->channels;
 493         priv->curve_data->entry_size = sizeof(__le16) +
 494                 sizeof(*dst) * curve_data->points_per_channel;
 495         priv->curve_data->offset = offsetof(struct pda_pa_curve_data, data);
 496         priv->curve_data->len = cd_len;
 497         memcpy(priv->curve_data->data, curve_data, sizeof(*curve_data));
 498         source = curve_data->data;
 499         target = ((struct pda_pa_curve_data *) priv->curve_data->data)->data;
 500         for (i = 0; i < curve_data->channels; i++) {
 501                 __le16 *freq = source;
 502                 source += sizeof(__le16);
 503                 *((__le16 *)target) = *freq;
 504                 target += sizeof(__le16);
 505                 for (j = 0; j < curve_data->points_per_channel; j++) {
 506                         memcpy(target, source, sizeof(*src));
 507
 508                         target += sizeof(*dst);
 509                         source += sizeof(*src);
 510                 }
 511                 source++;
 512         }
 513
 514         return 0;
 515 }
 516
 517 static const char *p54_rf_chips[] = { "INVALID-0", "Duette3", "Duette2",
 518         "Frisbee", "Xbow", "Longbow", "INVALID-6", "INVALID-7" };
 519
 520 static int p54_parse_rssical(struct ieee80211_hw *dev,
 521                              u8 *data, int len, u16 type)
 522 {
 523         struct p54_common *priv = dev->priv;
 524         struct p54_rssi_db_entry *entry;
 525         size_t db_len, entries;
 526         int offset = 0, i;
 527
 528         if (type != PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED) {
 529                 entries = (type == PDR_RSSI_LINEAR_APPROXIMATION) ? 1 : 2;
 530                 if (len != sizeof(struct pda_rssi_cal_entry) * entries) {
 531                         wiphy_err(dev->wiphy, "rssical size mismatch.\n");
 532                         goto err_data;
 533                 }
 534         } else {
 535                 /*
 536                  * Some devices (Dell 1450 USB, Xbow 5GHz card, etc...)
 537                  * have an empty two byte header.
 538                  */
 539                 if (*((__le16 *)&data[offset]) == cpu_to_le16(0))
 540                         offset += 2;
 541
 542                 entries = (len - offset) /
 543                         sizeof(struct pda_rssi_cal_ext_entry);
 544
 545                 if (len < offset ||
 546                     (len - offset) % sizeof(struct pda_rssi_cal_ext_entry) ||
 547                     entries == 0) {
 548                         wiphy_err(dev->wiphy, "invalid rssi database.\n");
 549                         goto err_data;
 550                 }
 551         }
 552
 553         db_len = sizeof(*entry) * entries;
 554         priv->rssi_db = kzalloc(db_len + sizeof(*priv->rssi_db), GFP_KERNEL);
 555         if (!priv->rssi_db)
 556                 return -ENOMEM;
 557
 558         priv->rssi_db->offset = 0;
 559         priv->rssi_db->entries = entries;
 560         priv->rssi_db->entry_size = sizeof(*entry);
 561         priv->rssi_db->len = db_len;
 562
 563         entry = (void *)((unsigned long)priv->rssi_db->data + priv->rssi_db->offset);
 564         if (type == PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED) {
 565                 struct pda_rssi_cal_ext_entry *cal = (void *) &data[offset];
 566
 567                 for (i = 0; i < entries; i++) {
 568                         entry[i].freq = le16_to_cpu(cal[i].freq);
 569                         entry[i].mul = (s16) le16_to_cpu(cal[i].mul);
 570                         entry[i].add = (s16) le16_to_cpu(cal[i].add);
 571                 }
 572         } else {
 573                 struct pda_rssi_cal_entry *cal = (void *) &data[offset];
 574
 575                 for (i = 0; i < entries; i++) {
 576                         u16 freq = 0;
 577                         switch (i) {
 578                         case NL80211_BAND_2GHZ:
 579                                 freq = 2437;
 580                                 break;
 581                         case NL80211_BAND_5GHZ:
 582                                 freq = 5240;
 583                                 break;
 584                         }
 585
 586                         entry[i].freq = freq;
 587                         entry[i].mul = (s16) le16_to_cpu(cal[i].mul);
 588                         entry[i].add = (s16) le16_to_cpu(cal[i].add);
 589                 }
 590         }
 591
 592         /* sort the list by channel frequency */
 593         sort(entry, entries, sizeof(*entry), p54_compare_rssichan, NULL);
 594         return 0;
 595
 596 err_data:
 597         wiphy_err(dev->wiphy,
 598                   "rssi calibration data packing type:(%x) len:%d.\n",
 599                   type, len);
 600
 601         print_hex_dump_bytes("rssical:", DUMP_PREFIX_NONE, data, len);
 602
 603         wiphy_err(dev->wiphy, "please report this issue.\n");
 604         return -EINVAL;
 605 }
 606
 607 struct p54_rssi_db_entry *p54_rssi_find(struct p54_common *priv, const u16 freq)
 608 {
 609         struct p54_rssi_db_entry *entry;
 610         int i, found = -1;
 611
 612         if (!priv->rssi_db)
 613                 return &p54_rssi_default;
 614
 615         entry = (void *)(priv->rssi_db->data + priv->rssi_db->offset);
 616         for (i = 0; i < priv->rssi_db->entries; i++) {
 617                 if (!same_band(freq, entry[i].freq))
 618                         continue;
 619
 620                 if (found == -1) {
 621                         found = i;
 622                         continue;
 623                 }
 624
 625                 /* nearest match */
 626                 if (abs(freq - entry[i].freq) <
 627                     abs(freq - entry[found].freq)) {
 628                         found = i;
 629                         continue;
 630                 } else {
 631                         break;
 632                 }
 633         }
 634
 635         return found < 0 ? &p54_rssi_default : &entry[found];
 636 }
 637
 638 static void p54_parse_default_country(struct ieee80211_hw *dev,
 639                                       void *data, int len)
 640 {
 641         struct pda_country *country;
 642
 643         if (len != sizeof(*country)) {
 644                 wiphy_err(dev->wiphy,
 645                           "found possible invalid default country eeprom entry. (entry size: %d)\n",
 646                           len);
 647
 648                 print_hex_dump_bytes("country:", DUMP_PREFIX_NONE,
 649                                      data, len);
 650
 651                 wiphy_err(dev->wiphy, "please report this issue.\n");
 652                 return;
 653         }
 654
 655         country = (struct pda_country *) data;
 656         if (country->flags == PDR_COUNTRY_CERT_CODE_PSEUDO)
 657                 regulatory_hint(dev->wiphy, country->alpha2);
 658         else {
 659                 /* TODO:
 660                  * write a shared/common function that converts
 661                  * "Regulatory domain codes" (802.11-2007 14.8.2.2)
 662                  * into ISO/IEC 3166-1 alpha2 for regulatory_hint.
 663                  */
 664         }
 665 }
 666
 667 static int p54_convert_output_limits(struct ieee80211_hw *dev,
 668                                      u8 *data, size_t len)
 669 {
 670         struct p54_common *priv = dev->priv;
 671
 672         if (len < 2)
 673                 return -EINVAL;
 674
 675         if (data[0] != 0) {
 676                 wiphy_err(dev->wiphy, "unknown output power db revision:%x\n",
 677                           data[0]);
 678                 return -EINVAL;
 679         }
 680
 681         if (2 + data[1] * sizeof(struct pda_channel_output_limit) > len)
 682                 return -EINVAL;
 683
 684         priv->output_limit = kmalloc(data[1] *
 685                 sizeof(struct pda_channel_output_limit) +
 686                 sizeof(*priv->output_limit), GFP_KERNEL);
 687
 688         if (!priv->output_limit)
 689                 return -ENOMEM;
 690
 691         priv->output_limit->offset = 0;
 692         priv->output_limit->entries = data[1];
 693         priv->output_limit->entry_size =
 694                 sizeof(struct pda_channel_output_limit);
 695         priv->output_limit->len = priv->output_limit->entry_size *
 696                                   priv->output_limit->entries +
 697                                   priv->output_limit->offset;
 698
 699         memcpy(priv->output_limit->data, &data[2],
 700                data[1] * sizeof(struct pda_channel_output_limit));
 701
 702         return 0;
 703 }
 704
 705 static struct p54_cal_database *p54_convert_db(struct pda_custom_wrapper *src,
 706                                                size_t total_len)
 707 {
 708         struct p54_cal_database *dst;
 709         size_t payload_len, entries, entry_size, offset;
 710
 711         payload_len = le16_to_cpu(src->len);
 712         entries = le16_to_cpu(src->entries);
 713         entry_size = le16_to_cpu(src->entry_size);
 714         offset = le16_to_cpu(src->offset);
 715         if (((entries * entry_size + offset) != payload_len) ||
 716              (payload_len + sizeof(*src) != total_len))
 717                 return NULL;
 718
 719         dst = kmalloc(sizeof(*dst) + payload_len, GFP_KERNEL);
 720         if (!dst)
 721                 return NULL;
 722
 723         dst->entries = entries;
 724         dst->entry_size = entry_size;
 725         dst->offset = offset;
 726         dst->len = payload_len;
 727
 728         memcpy(dst->data, src->data, payload_len);
 729         return dst;
 730 }
 731
 732 int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
 733 {
 734         struct p54_common *priv = dev->priv;
 735         struct eeprom_pda_wrap *wrap;
 736         struct pda_entry *entry;
 737         unsigned int data_len, entry_len;
 738         void *tmp;
 739         int err;
 740         u8 *end = (u8 *)eeprom + len;
 741         u16 synth = 0;
 742         u16 crc16 = ~0;
 743
 744         wrap = (struct eeprom_pda_wrap *) eeprom;
 745         entry = (void *)wrap->data + le16_to_cpu(wrap->len);
 746
 747         /* verify that at least the entry length/code fits */
 748         while ((u8 *)entry <= end - sizeof(*entry)) {
 749                 entry_len = le16_to_cpu(entry->len);
 750                 data_len = ((entry_len - 1) << 1);
 751
 752                 /* abort if entry exceeds whole structure */
 753                 if ((u8 *)entry + sizeof(*entry) + data_len > end)
 754                         break;
 755
 756                 switch (le16_to_cpu(entry->code)) {
 757                 case PDR_MAC_ADDRESS:
 758                         if (data_len != ETH_ALEN)
 759                                 break;
 760                         SET_IEEE80211_PERM_ADDR(dev, entry->data);
 761                         break;
 762                 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS:
 763                         if (priv->output_limit)
 764                                 break;
 765                         err = p54_convert_output_limits(dev, entry->data,
 766                                                         data_len);
 767                         if (err)
 768                                 goto err;
 769                         break;
 770                 case PDR_PRISM_PA_CAL_CURVE_DATA: {
 771                         struct pda_pa_curve_data *curve_data =
 772                                 (struct pda_pa_curve_data *)entry->data;
 773                         if (data_len < sizeof(*curve_data)) {
 774                                 err = -EINVAL;
 775                                 goto err;
 776                         }
 777
 778                         switch (curve_data->cal_method_rev) {
 779                         case 0:
 780                                 err = p54_convert_rev0(dev, curve_data);
 781                                 break;
 782                         case 1:
 783                                 err = p54_convert_rev1(dev, curve_data);
 784                                 break;
 785                         default:
 786                                 wiphy_err(dev->wiphy,
 787                                           "unknown curve data revision %d\n",
 788                                           curve_data->cal_method_rev);
 789                                 err = -ENODEV;
 790                                 break;
 791                         }
 792                         if (err)
 793                                 goto err;
 794                         }
 795                         break;
 796                 case PDR_PRISM_ZIF_TX_IQ_CALIBRATION:
 797                         priv->iq_autocal = kmemdup(entry->data, data_len,
 798                                                    GFP_KERNEL);
 799                         if (!priv->iq_autocal) {
 800                                 err = -ENOMEM;
 801                                 goto err;
 802                         }
 803
 804                         priv->iq_autocal_len = data_len / sizeof(struct pda_iq_autocal_entry);
 805                         break;
 806                 case PDR_DEFAULT_COUNTRY:
 807                         p54_parse_default_country(dev, entry->data, data_len);
 808                         break;
 809                 case PDR_INTERFACE_LIST:
 810                         tmp = entry->data;
 811                         while ((u8 *)tmp < entry->data + data_len) {
 812                                 struct exp_if *exp_if = tmp;
 813                                 if (exp_if->if_id == cpu_to_le16(IF_ID_ISL39000))
 814                                         synth = le16_to_cpu(exp_if->variant);
 815                                 tmp += sizeof(*exp_if);
 816                         }
 817                         break;
 818                 case PDR_HARDWARE_PLATFORM_COMPONENT_ID:
 819                         if (data_len < 2)
 820                                 break;
 821                         priv->version = *(u8 *)(entry->data + 1);
 822                         break;
 823                 case PDR_RSSI_LINEAR_APPROXIMATION:
 824                 case PDR_RSSI_LINEAR_APPROXIMATION_DUAL_BAND:
 825                 case PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED:
 826                         err = p54_parse_rssical(dev, entry->data, data_len,
 827                                                 le16_to_cpu(entry->code));
 828                         if (err)
 829                                 goto err;
 830                         break;
 831                 case PDR_RSSI_LINEAR_APPROXIMATION_CUSTOMV2: {
 832                         struct pda_custom_wrapper *pda = (void *) entry->data;
 833                         __le16 *src;
 834                         u16 *dst;
 835                         int i;
 836
 837                         if (priv->rssi_db || data_len < sizeof(*pda))
 838                                 break;
 839
 840                         priv->rssi_db = p54_convert_db(pda, data_len);
 841                         if (!priv->rssi_db)
 842                                 break;
 843
 844                         src = (void *) priv->rssi_db->data;
 845                         dst = (void *) priv->rssi_db->data;
 846
 847                         for (i = 0; i < priv->rssi_db->entries; i++)
 848                                 *(dst++) = (s16) le16_to_cpu(*(src++));
 849
 850                         }
 851                         break;
 852                 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS_CUSTOM: {
 853                         struct pda_custom_wrapper *pda = (void *) entry->data;
 854                         if (priv->output_limit || data_len < sizeof(*pda))
 855                                 break;
 856                         priv->output_limit = p54_convert_db(pda, data_len);
 857                         }
 858                         break;
 859                 case PDR_PRISM_PA_CAL_CURVE_DATA_CUSTOM: {
 860                         struct pda_custom_wrapper *pda = (void *) entry->data;
 861                         if (priv->curve_data || data_len < sizeof(*pda))
 862                                 break;
 863                         priv->curve_data = p54_convert_db(pda, data_len);
 864                         }
 865                         break;
 866                 case PDR_END:
 867                         crc16 = ~crc_ccitt(crc16, (u8 *) entry, sizeof(*entry));
 868                         if (crc16 != le16_to_cpup((__le16 *)entry->data)) {
 869                                 wiphy_err(dev->wiphy, "eeprom failed checksum "
 870                                          "test!\n");
 871                                 err = -ENOMSG;
 872                                 goto err;
 873                         } else {
 874                                 goto good_eeprom;
 875                         }
 876                         break;
 877                 default:
 878                         break;
 879                 }
 880
 881                 crc16 = crc_ccitt(crc16, (u8 *)entry, (entry_len + 1) * 2);
 882                 entry = (void *)entry + (entry_len + 1) * 2;
 883         }
 884
 885         wiphy_err(dev->wiphy, "unexpected end of eeprom data.\n");
 886         err = -ENODATA;
 887         goto err;
 888
 889 good_eeprom:
 890         if (!synth || !priv->iq_autocal || !priv->output_limit ||
 891             !priv->curve_data) {
 892                 wiphy_err(dev->wiphy,
 893                           "not all required entries found in eeprom!\n");
 894                 err = -EINVAL;
 895                 goto err;
 896         }
 897
 898         priv->rxhw = synth & PDR_SYNTH_FRONTEND_MASK;
 899
 900         err = p54_generate_channel_lists(dev);
 901         if (err)
 902                 goto err;
 903
 904         if (priv->rxhw == PDR_SYNTH_FRONTEND_XBOW)
 905                 p54_init_xbow_synth(priv);
 906         if (!(synth & PDR_SYNTH_24_GHZ_DISABLED))
 907                 dev->wiphy->bands[NL80211_BAND_2GHZ] =
 908                         priv->band_table[NL80211_BAND_2GHZ];
 909         if (!(synth & PDR_SYNTH_5_GHZ_DISABLED))
 910                 dev->wiphy->bands[NL80211_BAND_5GHZ] =
 911                         priv->band_table[NL80211_BAND_5GHZ];
 912         if ((synth & PDR_SYNTH_RX_DIV_MASK) == PDR_SYNTH_RX_DIV_SUPPORTED)
 913                 priv->rx_diversity_mask = 3;
 914         if ((synth & PDR_SYNTH_TX_DIV_MASK) == PDR_SYNTH_TX_DIV_SUPPORTED)
 915                 priv->tx_diversity_mask = 3;
 916
 917         if (!is_valid_ether_addr(dev->wiphy->perm_addr)) {
 918                 u8 perm_addr[ETH_ALEN];
 919
 920                 wiphy_warn(dev->wiphy,
 921                            "Invalid hwaddr! Using randomly generated MAC addr\n");
 922                 eth_random_addr(perm_addr);
 923                 SET_IEEE80211_PERM_ADDR(dev, perm_addr);
 924         }
 925
 926         priv->cur_rssi = &p54_rssi_default;
 927
 928         wiphy_info(dev->wiphy, "hwaddr %pM, MAC:isl38%02x RF:%s\n",
 929                    dev->wiphy->perm_addr, priv->version,
 930                    p54_rf_chips[priv->rxhw]);
 931
 932         return 0;
 933
 934 err:
 935         kfree(priv->iq_autocal);
 936         kfree(priv->output_limit);
 937         kfree(priv->curve_data);
 938         kfree(priv->rssi_db);
 939         kfree(priv->survey);
 940         priv->iq_autocal = NULL;
 941         priv->output_limit = NULL;
 942         priv->curve_data = NULL;
 943         priv->rssi_db = NULL;
 944         priv->survey = NULL;
 945
 946         wiphy_err(dev->wiphy, "eeprom parse failed!\n");
 947         return err;
 948 }
 949 EXPORT_SYMBOL_GPL(p54_parse_eeprom);
 950
 951 int p54_read_eeprom(struct ieee80211_hw *dev)
 952 {
 953         struct p54_common *priv = dev->priv;
 954         size_t eeprom_size = 0x2020, offset = 0, blocksize, maxblocksize;
 955         int ret = -ENOMEM;
 956         void *eeprom;
 957
 958         maxblocksize = EEPROM_READBACK_LEN;
 959         if (priv->fw_var >= 0x509)
 960                 maxblocksize -= 0xc;
 961         else
 962                 maxblocksize -= 0x4;
 963
 964         eeprom = kzalloc(eeprom_size, GFP_KERNEL);
 965         if (unlikely(!eeprom))
 966                 goto free;
 967
 968         while (eeprom_size) {
 969                 blocksize = min(eeprom_size, maxblocksize);
 970                 ret = p54_download_eeprom(priv, eeprom + offset,
 971                                           offset, blocksize);
 972                 if (unlikely(ret))
 973                         goto free;
 974
 975                 offset += blocksize;
 976                 eeprom_size -= blocksize;
 977         }
 978
 979         ret = p54_parse_eeprom(dev, eeprom, offset);
 980 free:
 981         kfree(eeprom);
 982         return ret;
 983 }
 984 EXPORT_SYMBOL_GPL(p54_read_eeprom);