drivers/net/wireless/p54/eeprom.c

   1 /*
   2  * EEPROM parser code for mac80211 Prism54 drivers
   3  *
   4  * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
   5  * Copyright (c) 2007-2009, Christian Lamparter <chunkeey@web.de>
   6  * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
   7  *
   8  * Based on:
   9  * - the islsm (softmac prism54) driver, which is:
  10  *   Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
  11  * - stlc45xx driver
  12  *   Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License version 2 as
  16  * published by the Free Software Foundation.
  17  */
  18
  19 #include <linux/init.h>
  20 #include <linux/firmware.h>
  21 #include <linux/etherdevice.h>
  22 #include <linux/sort.h>
  23 #include <linux/slab.h>
  24
  25 #include <net/mac80211.h>
  26 #include <linux/crc-ccitt.h>
  27 #include <linux/export.h>
  28
  29 #include "p54.h"
  30 #include "eeprom.h"
  31 #include "lmac.h"
  32
  33 static struct ieee80211_rate p54_bgrates[] = {
  34         { .bitrate = 10, .hw_value = 0, },
  35         { .bitrate = 20, .hw_value = 1, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  36         { .bitrate = 55, .hw_value = 2, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  37         { .bitrate = 110, .hw_value = 3, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  38         { .bitrate = 60, .hw_value = 4, },
  39         { .bitrate = 90, .hw_value = 5, },
  40         { .bitrate = 120, .hw_value = 6, },
  41         { .bitrate = 180, .hw_value = 7, },
  42         { .bitrate = 240, .hw_value = 8, },
  43         { .bitrate = 360, .hw_value = 9, },
  44         { .bitrate = 480, .hw_value = 10, },
  45         { .bitrate = 540, .hw_value = 11, },
  46 };
  47
  48 static struct ieee80211_rate p54_arates[] = {
  49         { .bitrate = 60, .hw_value = 4, },
  50         { .bitrate = 90, .hw_value = 5, },
  51         { .bitrate = 120, .hw_value = 6, },
  52         { .bitrate = 180, .hw_value = 7, },
  53         { .bitrate = 240, .hw_value = 8, },
  54         { .bitrate = 360, .hw_value = 9, },
  55         { .bitrate = 480, .hw_value = 10, },
  56         { .bitrate = 540, .hw_value = 11, },
  57 };
  58
  59 static struct p54_rssi_db_entry p54_rssi_default = {
  60         /*
  61          * The defaults are taken from usb-logs of the
  62          * vendor driver. So, they should be safe to
  63          * use in case we can't get a match from the
  64          * rssi <-> dBm conversion database.
  65          */
  66         .mul = 130,
  67         .add = -398,
  68 };
  69
  70 #define CHAN_HAS_CAL            BIT(0)
  71 #define CHAN_HAS_LIMIT          BIT(1)
  72 #define CHAN_HAS_CURVE          BIT(2)
  73 #define CHAN_HAS_ALL            (CHAN_HAS_CAL | CHAN_HAS_LIMIT | CHAN_HAS_CURVE)
  74
  75 struct p54_channel_entry {
  76         u16 freq;
  77         u16 data;
  78         int index;
  79         int max_power;
  80         enum ieee80211_band band;
  81 };
  82
  83 struct p54_channel_list {
  84         struct p54_channel_entry *channels;
  85         size_t entries;
  86         size_t max_entries;
  87         size_t band_channel_num[IEEE80211_NUM_BANDS];
  88 };
  89
  90 static int p54_get_band_from_freq(u16 freq)
  91 {
  92         /* FIXME: sync these values with the 802.11 spec */
  93
  94         if ((freq >= 2412) && (freq <= 2484))
  95                 return IEEE80211_BAND_2GHZ;
  96
  97         if ((freq >= 4920) && (freq <= 5825))
  98                 return IEEE80211_BAND_5GHZ;
  99
 100         return -1;
 101 }
 102
 103 static int same_band(u16 freq, u16 freq2)
 104 {
 105         return p54_get_band_from_freq(freq) == p54_get_band_from_freq(freq2);
 106 }
 107
 108 static int p54_compare_channels(const void *_a,
 109                                 const void *_b)
 110 {
 111         const struct p54_channel_entry *a = _a;
 112         const struct p54_channel_entry *b = _b;
 113
 114         return a->freq - b->freq;
 115 }
 116
 117 static int p54_compare_rssichan(const void *_a,
 118                                 const void *_b)
 119 {
 120         const struct p54_rssi_db_entry *a = _a;
 121         const struct p54_rssi_db_entry *b = _b;
 122
 123         return a->freq - b->freq;
 124 }
 125
 126 static int p54_fill_band_bitrates(struct ieee80211_hw *dev,
 127                                   struct ieee80211_supported_band *band_entry,
 128                                   enum ieee80211_band band)
 129 {
 130         /* TODO: generate rate array dynamically */
 131
 132         switch (band) {
 133         case IEEE80211_BAND_2GHZ:
 134                 band_entry->bitrates = p54_bgrates;
 135                 band_entry->n_bitrates = ARRAY_SIZE(p54_bgrates);
 136                 break;
 137         case IEEE80211_BAND_5GHZ:
 138                 band_entry->bitrates = p54_arates;
 139                 band_entry->n_bitrates = ARRAY_SIZE(p54_arates);
 140                 break;
 141         default:
 142                 return -EINVAL;
 143         }
 144
 145         return 0;
 146 }
 147
 148 static int p54_generate_band(struct ieee80211_hw *dev,
 149                              struct p54_channel_list *list,
 150                              unsigned int *chan_num,
 151                              enum ieee80211_band band)
 152 {
 153         struct p54_common *priv = dev->priv;
 154         struct ieee80211_supported_band *tmp, *old;
 155         unsigned int i, j;
 156         int ret = -ENOMEM;
 157
 158         if ((!list->entries) || (!list->band_channel_num[band]))
 159                 return -EINVAL;
 160
 161         tmp = kzalloc(sizeof(*tmp), GFP_KERNEL);
 162         if (!tmp)
 163                 goto err_out;
 164
 165         tmp->channels = kzalloc(sizeof(struct ieee80211_channel) *
 166                                 list->band_channel_num[band], 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_CHANNEL_TIME |
 201                         SURVEY_INFO_CHANNEL_TIME_BUSY |
 202                         SURVEY_INFO_CHANNEL_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 == IEEE80211_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(rawpower, le16_to_cpu(point->val_qpsk));
 292                         rawpower = max(rawpower, le16_to_cpu(point->val_bpsk));
 293                         rawpower = max(rawpower, le16_to_cpu(point->val_16qam));
 294                         rawpower = max(rawpower, le16_to_cpu(point->val_64qam));
 295                 }
 296                 /* longbow seems to use 1/16 dBm units */
 297                 return rawpower / 16;
 298                 }
 299
 300         case PDR_SYNTH_FRONTEND_DUETTE3:
 301         case PDR_SYNTH_FRONTEND_DUETTE2:
 302         case PDR_SYNTH_FRONTEND_FRISBEE:
 303         case PDR_SYNTH_FRONTEND_XBOW: {
 304                 struct pda_channel_output_limit *pda = data;
 305                 u8 rawpower = 0;
 306                 rawpower = max(rawpower, pda->val_qpsk);
 307                 rawpower = max(rawpower, pda->val_bpsk);
 308                 rawpower = max(rawpower, pda->val_16qam);
 309                 rawpower = max(rawpower, pda->val_64qam);
 310                 /* raw values are in 1/4 dBm units */
 311                 return rawpower / 4;
 312                 }
 313
 314         default:
 315                 return 20;
 316         }
 317 }
 318
 319 static int p54_generate_channel_lists(struct ieee80211_hw *dev)
 320 {
 321         struct p54_common *priv = dev->priv;
 322         struct p54_channel_list *list;
 323         unsigned int i, j, k, max_channel_num;
 324         int ret = 0;
 325         u16 freq;
 326
 327         if ((priv->iq_autocal_len != priv->curve_data->entries) ||
 328             (priv->iq_autocal_len != priv->output_limit->entries))
 329                 wiphy_err(dev->wiphy,
 330                           "Unsupported or damaged EEPROM detected. "
 331                           "You may not be able to use all channels.\n");
 332
 333         max_channel_num = max_t(unsigned int, priv->output_limit->entries,
 334                                 priv->iq_autocal_len);
 335         max_channel_num = max_t(unsigned int, max_channel_num,
 336                                 priv->curve_data->entries);
 337
 338         list = kzalloc(sizeof(*list), GFP_KERNEL);
 339         if (!list) {
 340                 ret = -ENOMEM;
 341                 goto free;
 342         }
 343         priv->chan_num = max_channel_num;
 344         priv->survey = kzalloc(sizeof(struct survey_info) * max_channel_num,
 345                                GFP_KERNEL);
 346         if (!priv->survey) {
 347                 ret = -ENOMEM;
 348                 goto free;
 349         }
 350
 351         list->max_entries = max_channel_num;
 352         list->channels = kzalloc(sizeof(struct p54_channel_entry) *
 353                                  max_channel_num, GFP_KERNEL);
 354         if (!list->channels) {
 355                 ret = -ENOMEM;
 356                 goto free;
 357         }
 358
 359         for (i = 0; i < max_channel_num; i++) {
 360                 if (i < priv->iq_autocal_len) {
 361                         freq = le16_to_cpu(priv->iq_autocal[i].freq);
 362                         p54_update_channel_param(list, freq, CHAN_HAS_CAL);
 363                 }
 364
 365                 if (i < priv->output_limit->entries) {
 366                         struct p54_channel_entry *tmp;
 367
 368                         void *data = (void *) ((unsigned long) i *
 369                                 priv->output_limit->entry_size +
 370                                 priv->output_limit->offset +
 371                                 priv->output_limit->data);
 372
 373                         freq = le16_to_cpup((__le16 *) data);
 374                         tmp = p54_update_channel_param(list, freq,
 375                                                        CHAN_HAS_LIMIT);
 376                         if (tmp) {
 377                                 tmp->max_power = p54_get_maxpower(priv, data);
 378                         }
 379                 }
 380
 381                 if (i < priv->curve_data->entries) {
 382                         freq = le16_to_cpup((__le16 *) (i *
 383                                             priv->curve_data->entry_size +
 384                                             priv->curve_data->offset +
 385                                             priv->curve_data->data));
 386
 387                         p54_update_channel_param(list, freq, CHAN_HAS_CURVE);
 388                 }
 389         }
 390
 391         /* sort the channel list by frequency */
 392         sort(list->channels, list->entries, sizeof(struct p54_channel_entry),
 393              p54_compare_channels, NULL);
 394
 395         k = 0;
 396         for (i = 0, j = 0; i < IEEE80211_NUM_BANDS; i++) {
 397                 if (p54_generate_band(dev, list, &k, i) == 0)
 398                         j++;
 399         }
 400         if (j == 0) {
 401                 /* no useable band available. */
 402                 ret = -EINVAL;
 403         }
 404
 405 free:
 406         if (list) {
 407                 kfree(list->channels);
 408                 kfree(list);
 409         }
 410         if (ret) {
 411                 kfree(priv->survey);
 412                 priv->survey = NULL;
 413         }
 414
 415         return ret;
 416 }
 417
 418 static int p54_convert_rev0(struct ieee80211_hw *dev,
 419                             struct pda_pa_curve_data *curve_data)
 420 {
 421         struct p54_common *priv = dev->priv;
 422         struct p54_pa_curve_data_sample *dst;
 423         struct pda_pa_curve_data_sample_rev0 *src;
 424         size_t cd_len = sizeof(*curve_data) +
 425                 (curve_data->points_per_channel*sizeof(*dst) + 2) *
 426                  curve_data->channels;
 427         unsigned int i, j;
 428         void *source, *target;
 429
 430         priv->curve_data = kmalloc(sizeof(*priv->curve_data) + cd_len,
 431                                    GFP_KERNEL);
 432         if (!priv->curve_data)
 433                 return -ENOMEM;
 434
 435         priv->curve_data->entries = curve_data->channels;
 436         priv->curve_data->entry_size = sizeof(__le16) +
 437                 sizeof(*dst) * curve_data->points_per_channel;
 438         priv->curve_data->offset = offsetof(struct pda_pa_curve_data, data);
 439         priv->curve_data->len = cd_len;
 440         memcpy(priv->curve_data->data, curve_data, sizeof(*curve_data));
 441         source = curve_data->data;
 442         target = ((struct pda_pa_curve_data *) priv->curve_data->data)->data;
 443         for (i = 0; i < curve_data->channels; i++) {
 444                 __le16 *freq = source;
 445                 source += sizeof(__le16);
 446                 *((__le16 *)target) = *freq;
 447                 target += sizeof(__le16);
 448                 for (j = 0; j < curve_data->points_per_channel; j++) {
 449                         dst = target;
 450                         src = source;
 451
 452                         dst->rf_power = src->rf_power;
 453                         dst->pa_detector = src->pa_detector;
 454                         dst->data_64qam = src->pcv;
 455                         /* "invent" the points for the other modulations */
 456 #define SUB(x, y) (u8)(((x) - (y)) > (x) ? 0 : (x) - (y))
 457                         dst->data_16qam = SUB(src->pcv, 12);
 458                         dst->data_qpsk = SUB(dst->data_16qam, 12);
 459                         dst->data_bpsk = SUB(dst->data_qpsk, 12);
 460                         dst->data_barker = SUB(dst->data_bpsk, 14);
 461 #undef SUB
 462                         target += sizeof(*dst);
 463                         source += sizeof(*src);
 464                 }
 465         }
 466
 467         return 0;
 468 }
 469
 470 static int p54_convert_rev1(struct ieee80211_hw *dev,
 471                             struct pda_pa_curve_data *curve_data)
 472 {
 473         struct p54_common *priv = dev->priv;
 474         struct p54_pa_curve_data_sample *dst;
 475         struct pda_pa_curve_data_sample_rev1 *src;
 476         size_t cd_len = sizeof(*curve_data) +
 477                 (curve_data->points_per_channel*sizeof(*dst) + 2) *
 478                  curve_data->channels;
 479         unsigned int i, j;
 480         void *source, *target;
 481
 482         priv->curve_data = kzalloc(cd_len + sizeof(*priv->curve_data),
 483                                    GFP_KERNEL);
 484         if (!priv->curve_data)
 485                 return -ENOMEM;
 486
 487         priv->curve_data->entries = curve_data->channels;
 488         priv->curve_data->entry_size = sizeof(__le16) +
 489                 sizeof(*dst) * curve_data->points_per_channel;
 490         priv->curve_data->offset = offsetof(struct pda_pa_curve_data, data);
 491         priv->curve_data->len = cd_len;
 492         memcpy(priv->curve_data->data, curve_data, sizeof(*curve_data));
 493         source = curve_data->data;
 494         target = ((struct pda_pa_curve_data *) priv->curve_data->data)->data;
 495         for (i = 0; i < curve_data->channels; i++) {
 496                 __le16 *freq = source;
 497                 source += sizeof(__le16);
 498                 *((__le16 *)target) = *freq;
 499                 target += sizeof(__le16);
 500                 for (j = 0; j < curve_data->points_per_channel; j++) {
 501                         memcpy(target, source, sizeof(*src));
 502
 503                         target += sizeof(*dst);
 504                         source += sizeof(*src);
 505                 }
 506                 source++;
 507         }
 508
 509         return 0;
 510 }
 511
 512 static const char *p54_rf_chips[] = { "INVALID-0", "Duette3", "Duette2",
 513         "Frisbee", "Xbow", "Longbow", "INVALID-6", "INVALID-7" };
 514
 515 static int p54_parse_rssical(struct ieee80211_hw *dev,
 516                              u8 *data, int len, u16 type)
 517 {
 518         struct p54_common *priv = dev->priv;
 519         struct p54_rssi_db_entry *entry;
 520         size_t db_len, entries;
 521         int offset = 0, i;
 522
 523         if (type != PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED) {
 524                 entries = (type == PDR_RSSI_LINEAR_APPROXIMATION) ? 1 : 2;
 525                 if (len != sizeof(struct pda_rssi_cal_entry) * entries) {
 526                         wiphy_err(dev->wiphy, "rssical size mismatch.\n");
 527                         goto err_data;
 528                 }
 529         } else {
 530                 /*
 531                  * Some devices (Dell 1450 USB, Xbow 5GHz card, etc...)
 532                  * have an empty two byte header.
 533                  */
 534                 if (*((__le16 *)&data[offset]) == cpu_to_le16(0))
 535                         offset += 2;
 536
 537                 entries = (len - offset) /
 538                         sizeof(struct pda_rssi_cal_ext_entry);
 539
 540                 if ((len - offset) % sizeof(struct pda_rssi_cal_ext_entry) ||
 541                     entries <= 0) {
 542                         wiphy_err(dev->wiphy, "invalid rssi database.\n");
 543                         goto err_data;
 544                 }
 545         }
 546
 547         db_len = sizeof(*entry) * entries;
 548         priv->rssi_db = kzalloc(db_len + sizeof(*priv->rssi_db), GFP_KERNEL);
 549         if (!priv->rssi_db)
 550                 return -ENOMEM;
 551
 552         priv->rssi_db->offset = 0;
 553         priv->rssi_db->entries = entries;
 554         priv->rssi_db->entry_size = sizeof(*entry);
 555         priv->rssi_db->len = db_len;
 556
 557         entry = (void *)((unsigned long)priv->rssi_db->data + priv->rssi_db->offset);
 558         if (type == PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED) {
 559                 struct pda_rssi_cal_ext_entry *cal = (void *) &data[offset];
 560
 561                 for (i = 0; i < entries; i++) {
 562                         entry[i].freq = le16_to_cpu(cal[i].freq);
 563                         entry[i].mul = (s16) le16_to_cpu(cal[i].mul);
 564                         entry[i].add = (s16) le16_to_cpu(cal[i].add);
 565                 }
 566         } else {
 567                 struct pda_rssi_cal_entry *cal = (void *) &data[offset];
 568
 569                 for (i = 0; i < entries; i++) {
 570                         u16 freq = 0;
 571                         switch (i) {
 572                         case IEEE80211_BAND_2GHZ:
 573                                 freq = 2437;
 574                                 break;
 575                         case IEEE80211_BAND_5GHZ:
 576                                 freq = 5240;
 577                                 break;
 578                         }
 579
 580                         entry[i].freq = freq;
 581                         entry[i].mul = (s16) le16_to_cpu(cal[i].mul);
 582                         entry[i].add = (s16) le16_to_cpu(cal[i].add);
 583                 }
 584         }
 585
 586         /* sort the list by channel frequency */
 587         sort(entry, entries, sizeof(*entry), p54_compare_rssichan, NULL);
 588         return 0;
 589
 590 err_data:
 591         wiphy_err(dev->wiphy,
 592                   "rssi calibration data packing type:(%x) len:%d.\n",
 593                   type, len);
 594
 595         print_hex_dump_bytes("rssical:", DUMP_PREFIX_NONE, data, len);
 596
 597         wiphy_err(dev->wiphy, "please report this issue.\n");
 598         return -EINVAL;
 599 }
 600
 601 struct p54_rssi_db_entry *p54_rssi_find(struct p54_common *priv, const u16 freq)
 602 {
 603         struct p54_rssi_db_entry *entry;
 604         int i, found = -1;
 605
 606         if (!priv->rssi_db)
 607                 return &p54_rssi_default;
 608
 609         entry = (void *)(priv->rssi_db->data + priv->rssi_db->offset);
 610         for (i = 0; i < priv->rssi_db->entries; i++) {
 611                 if (!same_band(freq, entry[i].freq))
 612                         continue;
 613
 614                 if (found == -1) {
 615                         found = i;
 616                         continue;
 617                 }
 618
 619                 /* nearest match */
 620                 if (abs(freq - entry[i].freq) <
 621                     abs(freq - entry[found].freq)) {
 622                         found = i;
 623                         continue;
 624                 } else {
 625                         break;
 626                 }
 627         }
 628
 629         return found < 0 ? &p54_rssi_default : &entry[found];
 630 }
 631
 632 static void p54_parse_default_country(struct ieee80211_hw *dev,
 633                                       void *data, int len)
 634 {
 635         struct pda_country *country;
 636
 637         if (len != sizeof(*country)) {
 638                 wiphy_err(dev->wiphy,
 639                           "found possible invalid default country eeprom entry. (entry size: %d)\n",
 640                           len);
 641
 642                 print_hex_dump_bytes("country:", DUMP_PREFIX_NONE,
 643                                      data, len);
 644
 645                 wiphy_err(dev->wiphy, "please report this issue.\n");
 646                 return;
 647         }
 648
 649         country = (struct pda_country *) data;
 650         if (country->flags == PDR_COUNTRY_CERT_CODE_PSEUDO)
 651                 regulatory_hint(dev->wiphy, country->alpha2);
 652         else {
 653                 /* TODO:
 654                  * write a shared/common function that converts
 655                  * "Regulatory domain codes" (802.11-2007 14.8.2.2)
 656                  * into ISO/IEC 3166-1 alpha2 for regulatory_hint.
 657                  */
 658         }
 659 }
 660
 661 static int p54_convert_output_limits(struct ieee80211_hw *dev,
 662                                      u8 *data, size_t len)
 663 {
 664         struct p54_common *priv = dev->priv;
 665
 666         if (len < 2)
 667                 return -EINVAL;
 668
 669         if (data[0] != 0) {
 670                 wiphy_err(dev->wiphy, "unknown output power db revision:%x\n",
 671                           data[0]);
 672                 return -EINVAL;
 673         }
 674
 675         if (2 + data[1] * sizeof(struct pda_channel_output_limit) > len)
 676                 return -EINVAL;
 677
 678         priv->output_limit = kmalloc(data[1] *
 679                 sizeof(struct pda_channel_output_limit) +
 680                 sizeof(*priv->output_limit), GFP_KERNEL);
 681
 682         if (!priv->output_limit)
 683                 return -ENOMEM;
 684
 685         priv->output_limit->offset = 0;
 686         priv->output_limit->entries = data[1];
 687         priv->output_limit->entry_size =
 688                 sizeof(struct pda_channel_output_limit);
 689         priv->output_limit->len = priv->output_limit->entry_size *
 690                                   priv->output_limit->entries +
 691                                   priv->output_limit->offset;
 692
 693         memcpy(priv->output_limit->data, &data[2],
 694                data[1] * sizeof(struct pda_channel_output_limit));
 695
 696         return 0;
 697 }
 698
 699 static struct p54_cal_database *p54_convert_db(struct pda_custom_wrapper *src,
 700                                                size_t total_len)
 701 {
 702         struct p54_cal_database *dst;
 703         size_t payload_len, entries, entry_size, offset;
 704
 705         payload_len = le16_to_cpu(src->len);
 706         entries = le16_to_cpu(src->entries);
 707         entry_size = le16_to_cpu(src->entry_size);
 708         offset = le16_to_cpu(src->offset);
 709         if (((entries * entry_size + offset) != payload_len) ||
 710              (payload_len + sizeof(*src) != total_len))
 711                 return NULL;
 712
 713         dst = kmalloc(sizeof(*dst) + payload_len, GFP_KERNEL);
 714         if (!dst)
 715                 return NULL;
 716
 717         dst->entries = entries;
 718         dst->entry_size = entry_size;
 719         dst->offset = offset;
 720         dst->len = payload_len;
 721
 722         memcpy(dst->data, src->data, payload_len);
 723         return dst;
 724 }
 725
 726 int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
 727 {
 728         struct p54_common *priv = dev->priv;
 729         struct eeprom_pda_wrap *wrap;
 730         struct pda_entry *entry;
 731         unsigned int data_len, entry_len;
 732         void *tmp;
 733         int err;
 734         u8 *end = (u8 *)eeprom + len;
 735         u16 synth = 0;
 736         u16 crc16 = ~0;
 737
 738         wrap = (struct eeprom_pda_wrap *) eeprom;
 739         entry = (void *)wrap->data + le16_to_cpu(wrap->len);
 740
 741         /* verify that at least the entry length/code fits */
 742         while ((u8 *)entry <= end - sizeof(*entry)) {
 743                 entry_len = le16_to_cpu(entry->len);
 744                 data_len = ((entry_len - 1) << 1);
 745
 746                 /* abort if entry exceeds whole structure */
 747                 if ((u8 *)entry + sizeof(*entry) + data_len > end)
 748                         break;
 749
 750                 switch (le16_to_cpu(entry->code)) {
 751                 case PDR_MAC_ADDRESS:
 752                         if (data_len != ETH_ALEN)
 753                                 break;
 754                         SET_IEEE80211_PERM_ADDR(dev, entry->data);
 755                         break;
 756                 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS:
 757                         if (priv->output_limit)
 758                                 break;
 759                         err = p54_convert_output_limits(dev, entry->data,
 760                                                         data_len);
 761                         if (err)
 762                                 goto err;
 763                         break;
 764                 case PDR_PRISM_PA_CAL_CURVE_DATA: {
 765                         struct pda_pa_curve_data *curve_data =
 766                                 (struct pda_pa_curve_data *)entry->data;
 767                         if (data_len < sizeof(*curve_data)) {
 768                                 err = -EINVAL;
 769                                 goto err;
 770                         }
 771
 772                         switch (curve_data->cal_method_rev) {
 773                         case 0:
 774                                 err = p54_convert_rev0(dev, curve_data);
 775                                 break;
 776                         case 1:
 777                                 err = p54_convert_rev1(dev, curve_data);
 778                                 break;
 779                         default:
 780                                 wiphy_err(dev->wiphy,
 781                                           "unknown curve data revision %d\n",
 782                                           curve_data->cal_method_rev);
 783                                 err = -ENODEV;
 784                                 break;
 785                         }
 786                         if (err)
 787                                 goto err;
 788                         }
 789                         break;
 790                 case PDR_PRISM_ZIF_TX_IQ_CALIBRATION:
 791                         priv->iq_autocal = kmemdup(entry->data, data_len,
 792                                                    GFP_KERNEL);
 793                         if (!priv->iq_autocal) {
 794                                 err = -ENOMEM;
 795                                 goto err;
 796                         }
 797
 798                         priv->iq_autocal_len = data_len / sizeof(struct pda_iq_autocal_entry);
 799                         break;
 800                 case PDR_DEFAULT_COUNTRY:
 801                         p54_parse_default_country(dev, entry->data, data_len);
 802                         break;
 803                 case PDR_INTERFACE_LIST:
 804                         tmp = entry->data;
 805                         while ((u8 *)tmp < entry->data + data_len) {
 806                                 struct exp_if *exp_if = tmp;
 807                                 if (exp_if->if_id == cpu_to_le16(IF_ID_ISL39000))
 808                                         synth = le16_to_cpu(exp_if->variant);
 809                                 tmp += sizeof(*exp_if);
 810                         }
 811                         break;
 812                 case PDR_HARDWARE_PLATFORM_COMPONENT_ID:
 813                         if (data_len < 2)
 814                                 break;
 815                         priv->version = *(u8 *)(entry->data + 1);
 816                         break;
 817                 case PDR_RSSI_LINEAR_APPROXIMATION:
 818                 case PDR_RSSI_LINEAR_APPROXIMATION_DUAL_BAND:
 819                 case PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED:
 820                         err = p54_parse_rssical(dev, entry->data, data_len,
 821                                                 le16_to_cpu(entry->code));
 822                         if (err)
 823                                 goto err;
 824                         break;
 825                 case PDR_RSSI_LINEAR_APPROXIMATION_CUSTOMV2: {
 826                         struct pda_custom_wrapper *pda = (void *) entry->data;
 827                         __le16 *src;
 828                         u16 *dst;
 829                         int i;
 830
 831                         if (priv->rssi_db || data_len < sizeof(*pda))
 832                                 break;
 833
 834                         priv->rssi_db = p54_convert_db(pda, data_len);
 835                         if (!priv->rssi_db)
 836                                 break;
 837
 838                         src = (void *) priv->rssi_db->data;
 839                         dst = (void *) priv->rssi_db->data;
 840
 841                         for (i = 0; i < priv->rssi_db->entries; i++)
 842                                 *(dst++) = (s16) le16_to_cpu(*(src++));
 843
 844                         }
 845                         break;
 846                 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS_CUSTOM: {
 847                         struct pda_custom_wrapper *pda = (void *) entry->data;
 848                         if (priv->output_limit || data_len < sizeof(*pda))
 849                                 break;
 850                         priv->output_limit = p54_convert_db(pda, data_len);
 851                         }
 852                         break;
 853                 case PDR_PRISM_PA_CAL_CURVE_DATA_CUSTOM: {
 854                         struct pda_custom_wrapper *pda = (void *) entry->data;
 855                         if (priv->curve_data || data_len < sizeof(*pda))
 856                                 break;
 857                         priv->curve_data = p54_convert_db(pda, data_len);
 858                         }
 859                         break;
 860                 case PDR_END:
 861                         crc16 = ~crc_ccitt(crc16, (u8 *) entry, sizeof(*entry));
 862                         if (crc16 != le16_to_cpup((__le16 *)entry->data)) {
 863                                 wiphy_err(dev->wiphy, "eeprom failed checksum "
 864                                          "test!\n");
 865                                 err = -ENOMSG;
 866                                 goto err;
 867                         } else {
 868                                 goto good_eeprom;
 869                         }
 870                         break;
 871                 default:
 872                         break;
 873                 }
 874
 875                 crc16 = crc_ccitt(crc16, (u8 *)entry, (entry_len + 1) * 2);
 876                 entry = (void *)entry + (entry_len + 1) * 2;
 877         }
 878
 879         wiphy_err(dev->wiphy, "unexpected end of eeprom data.\n");
 880         err = -ENODATA;
 881         goto err;
 882
 883 good_eeprom:
 884         if (!synth || !priv->iq_autocal || !priv->output_limit ||
 885             !priv->curve_data) {
 886                 wiphy_err(dev->wiphy,
 887                           "not all required entries found in eeprom!\n");
 888                 err = -EINVAL;
 889                 goto err;
 890         }
 891
 892         priv->rxhw = synth & PDR_SYNTH_FRONTEND_MASK;
 893
 894         err = p54_generate_channel_lists(dev);
 895         if (err)
 896                 goto err;
 897
 898         if (priv->rxhw == PDR_SYNTH_FRONTEND_XBOW)
 899                 p54_init_xbow_synth(priv);
 900         if (!(synth & PDR_SYNTH_24_GHZ_DISABLED))
 901                 dev->wiphy->bands[IEEE80211_BAND_2GHZ] =
 902                         priv->band_table[IEEE80211_BAND_2GHZ];
 903         if (!(synth & PDR_SYNTH_5_GHZ_DISABLED))
 904                 dev->wiphy->bands[IEEE80211_BAND_5GHZ] =
 905                         priv->band_table[IEEE80211_BAND_5GHZ];
 906         if ((synth & PDR_SYNTH_RX_DIV_MASK) == PDR_SYNTH_RX_DIV_SUPPORTED)
 907                 priv->rx_diversity_mask = 3;
 908         if ((synth & PDR_SYNTH_TX_DIV_MASK) == PDR_SYNTH_TX_DIV_SUPPORTED)
 909                 priv->tx_diversity_mask = 3;
 910
 911         if (!is_valid_ether_addr(dev->wiphy->perm_addr)) {
 912                 u8 perm_addr[ETH_ALEN];
 913
 914                 wiphy_warn(dev->wiphy,
 915                            "Invalid hwaddr! Using randomly generated MAC addr\n");
 916                 eth_random_addr(perm_addr);
 917                 SET_IEEE80211_PERM_ADDR(dev, perm_addr);
 918         }
 919
 920         priv->cur_rssi = &p54_rssi_default;
 921
 922         wiphy_info(dev->wiphy, "hwaddr %pM, MAC:isl38%02x RF:%s\n",
 923                    dev->wiphy->perm_addr, priv->version,
 924                    p54_rf_chips[priv->rxhw]);
 925
 926         return 0;
 927
 928 err:
 929         kfree(priv->iq_autocal);
 930         kfree(priv->output_limit);
 931         kfree(priv->curve_data);
 932         kfree(priv->rssi_db);
 933         kfree(priv->survey);
 934         priv->iq_autocal = NULL;
 935         priv->output_limit = NULL;
 936         priv->curve_data = NULL;
 937         priv->rssi_db = NULL;
 938         priv->survey = NULL;
 939
 940         wiphy_err(dev->wiphy, "eeprom parse failed!\n");
 941         return err;
 942 }
 943 EXPORT_SYMBOL_GPL(p54_parse_eeprom);
 944
 945 int p54_read_eeprom(struct ieee80211_hw *dev)
 946 {
 947         struct p54_common *priv = dev->priv;
 948         size_t eeprom_size = 0x2020, offset = 0, blocksize, maxblocksize;
 949         int ret = -ENOMEM;
 950         void *eeprom;
 951
 952         maxblocksize = EEPROM_READBACK_LEN;
 953         if (priv->fw_var >= 0x509)
 954                 maxblocksize -= 0xc;
 955         else
 956                 maxblocksize -= 0x4;
 957
 958         eeprom = kzalloc(eeprom_size, GFP_KERNEL);
 959         if (unlikely(!eeprom))
 960                 goto free;
 961
 962         while (eeprom_size) {
 963                 blocksize = min(eeprom_size, maxblocksize);
 964                 ret = p54_download_eeprom(priv, eeprom + offset,
 965                                           offset, blocksize);
 966                 if (unlikely(ret))
 967                         goto free;
 968
 969                 offset += blocksize;
 970                 eeprom_size -= blocksize;
 971         }
 972
 973         ret = p54_parse_eeprom(dev, eeprom, offset);
 974 free:
 975         kfree(eeprom);
 976         return ret;
 977 }
 978 EXPORT_SYMBOL_GPL(p54_read_eeprom);