linux/drivers/net/wireless/p54/eeprom.c
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   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
  32static 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
  47static 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
  58static 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
  74struct p54_channel_entry {
  75        u16 freq;
  76        u16 data;
  77        int index;
  78        int max_power;
  79        enum ieee80211_band band;
  80};
  81
  82struct p54_channel_list {
  83        struct p54_channel_entry *channels;
  84        size_t entries;
  85        size_t max_entries;
  86        size_t band_channel_num[IEEE80211_NUM_BANDS];
  87};
  88
  89static int p54_get_band_from_freq(u16 freq)
  90{
  91        /* FIXME: sync these values with the 802.11 spec */
  92
  93        if ((freq >= 2412) && (freq <= 2484))
  94                return IEEE80211_BAND_2GHZ;
  95
  96        if ((freq >= 4920) && (freq <= 5825))
  97                return IEEE80211_BAND_5GHZ;
  98
  99        return -1;
 100}
 101
 102static int same_band(u16 freq, u16 freq2)
 103{
 104        return p54_get_band_from_freq(freq) == p54_get_band_from_freq(freq2);
 105}
 106
 107static 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
 116static 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
 125static int p54_fill_band_bitrates(struct ieee80211_hw *dev,
 126                                  struct ieee80211_supported_band *band_entry,
 127                                  enum ieee80211_band band)
 128{
 129        /* TODO: generate rate array dynamically */
 130
 131        switch (band) {
 132        case IEEE80211_BAND_2GHZ:
 133                band_entry->bitrates = p54_bgrates;
 134                band_entry->n_bitrates = ARRAY_SIZE(p54_bgrates);
 135                break;
 136        case IEEE80211_BAND_5GHZ:
 137                band_entry->bitrates = p54_arates;
 138                band_entry->n_bitrates = ARRAY_SIZE(p54_arates);
 139                break;
 140        default:
 141                return -EINVAL;
 142        }
 143
 144        return 0;
 145}
 146
 147static int p54_generate_band(struct ieee80211_hw *dev,
 148                             struct p54_channel_list *list,
 149                             unsigned int *chan_num,
 150                             enum ieee80211_band band)
 151{
 152        struct p54_common *priv = dev->priv;
 153        struct ieee80211_supported_band *tmp, *old;
 154        unsigned int i, j;
 155        int ret = -ENOMEM;
 156
 157        if ((!list->entries) || (!list->band_channel_num[band]))
 158                return -EINVAL;
 159
 160        tmp = kzalloc(sizeof(*tmp), GFP_KERNEL);
 161        if (!tmp)
 162                goto err_out;
 163
 164        tmp->channels = kzalloc(sizeof(struct ieee80211_channel) *
 165                                list->band_channel_num[band], GFP_KERNEL);
 166        if (!tmp->channels)
 167                goto err_out;
 168
 169        ret = p54_fill_band_bitrates(dev, tmp, band);
 170        if (ret)
 171                goto err_out;
 172
 173        for (i = 0, j = 0; (j < list->band_channel_num[band]) &&
 174                           (i < list->entries); i++) {
 175                struct p54_channel_entry *chan = &list->channels[i];
 176                struct ieee80211_channel *dest = &tmp->channels[j];
 177
 178                if (chan->band != band)
 179                        continue;
 180
 181                if (chan->data != CHAN_HAS_ALL) {
 182                        wiphy_err(dev->wiphy, "%s%s%s is/are missing for "
 183                                  "channel:%d [%d MHz].\n",
 184                                  (chan->data & CHAN_HAS_CAL ? "" :
 185                                   " [iqauto calibration data]"),
 186                                  (chan->data & CHAN_HAS_LIMIT ? "" :
 187                                   " [output power limits]"),
 188                                  (chan->data & CHAN_HAS_CURVE ? "" :
 189                                   " [curve data]"),
 190                                  chan->index, chan->freq);
 191                        continue;
 192                }
 193
 194                dest->band = chan->band;
 195                dest->center_freq = chan->freq;
 196                dest->max_power = chan->max_power;
 197                priv->survey[*chan_num].channel = &tmp->channels[j];
 198                priv->survey[*chan_num].filled = SURVEY_INFO_NOISE_DBM |
 199                        SURVEY_INFO_TIME |
 200                        SURVEY_INFO_TIME_BUSY |
 201                        SURVEY_INFO_TIME_TX;
 202                dest->hw_value = (*chan_num);
 203                j++;
 204                (*chan_num)++;
 205        }
 206
 207        if (j == 0) {
 208                wiphy_err(dev->wiphy, "Disabling totally damaged %d GHz band\n",
 209                          (band == IEEE80211_BAND_2GHZ) ? 2 : 5);
 210
 211                ret = -ENODATA;
 212                goto err_out;
 213        }
 214
 215        tmp->n_channels = j;
 216        old = priv->band_table[band];
 217        priv->band_table[band] = tmp;
 218        if (old) {
 219                kfree(old->channels);
 220                kfree(old);
 221        }
 222
 223        return 0;
 224
 225err_out:
 226        if (tmp) {
 227                kfree(tmp->channels);
 228                kfree(tmp);
 229        }
 230
 231        return ret;
 232}
 233
 234static struct p54_channel_entry *p54_update_channel_param(struct p54_channel_list *list,
 235                                                          u16 freq, u16 data)
 236{
 237        int i;
 238        struct p54_channel_entry *entry = NULL;
 239
 240        /*
 241         * usually all lists in the eeprom are mostly sorted.
 242         * so it's very likely that the entry we are looking for
 243         * is right at the end of the list
 244         */
 245        for (i = list->entries; i >= 0; i--) {
 246                if (freq == list->channels[i].freq) {
 247                        entry = &list->channels[i];
 248                        break;
 249                }
 250        }
 251
 252        if ((i < 0) && (list->entries < list->max_entries)) {
 253                /* entry does not exist yet. Initialize a new one. */
 254                int band = p54_get_band_from_freq(freq);
 255
 256                /*
 257                 * filter out frequencies which don't belong into
 258                 * any supported band.
 259                 */
 260                if (band >= 0) {
 261                        i = list->entries++;
 262                        list->band_channel_num[band]++;
 263
 264                        entry = &list->channels[i];
 265                        entry->freq = freq;
 266                        entry->band = band;
 267                        entry->index = ieee80211_frequency_to_channel(freq);
 268                        entry->max_power = 0;
 269                        entry->data = 0;
 270                }
 271        }
 272
 273        if (entry)
 274                entry->data |= data;
 275
 276        return entry;
 277}
 278
 279static int p54_get_maxpower(struct p54_common *priv, void *data)
 280{
 281        switch (priv->rxhw & PDR_SYNTH_FRONTEND_MASK) {
 282        case PDR_SYNTH_FRONTEND_LONGBOW: {
 283                struct pda_channel_output_limit_longbow *pda = data;
 284                int j;
 285                u16 rawpower = 0;
 286                pda = data;
 287                for (j = 0; j < ARRAY_SIZE(pda->point); j++) {
 288                        struct pda_channel_output_limit_point_longbow *point =
 289                                &pda->point[j];
 290                        rawpower = max_t(u16,
 291                                rawpower, le16_to_cpu(point->val_qpsk));
 292                        rawpower = max_t(u16,
 293                                rawpower, le16_to_cpu(point->val_bpsk));
 294                        rawpower = max_t(u16,
 295                                rawpower, le16_to_cpu(point->val_16qam));
 296                        rawpower = max_t(u16,
 297                                rawpower, le16_to_cpu(point->val_64qam));
 298                }
 299                /* longbow seems to use 1/16 dBm units */
 300                return rawpower / 16;
 301                }
 302
 303        case PDR_SYNTH_FRONTEND_DUETTE3:
 304        case PDR_SYNTH_FRONTEND_DUETTE2:
 305        case PDR_SYNTH_FRONTEND_FRISBEE:
 306        case PDR_SYNTH_FRONTEND_XBOW: {
 307                struct pda_channel_output_limit *pda = data;
 308                u8 rawpower = 0;
 309                rawpower = max(rawpower, pda->val_qpsk);
 310                rawpower = max(rawpower, pda->val_bpsk);
 311                rawpower = max(rawpower, pda->val_16qam);
 312                rawpower = max(rawpower, pda->val_64qam);
 313                /* raw values are in 1/4 dBm units */
 314                return rawpower / 4;
 315                }
 316
 317        default:
 318                return 20;
 319        }
 320}
 321
 322static int p54_generate_channel_lists(struct ieee80211_hw *dev)
 323{
 324        struct p54_common *priv = dev->priv;
 325        struct p54_channel_list *list;
 326        unsigned int i, j, k, max_channel_num;
 327        int ret = 0;
 328        u16 freq;
 329
 330        if ((priv->iq_autocal_len != priv->curve_data->entries) ||
 331            (priv->iq_autocal_len != priv->output_limit->entries))
 332                wiphy_err(dev->wiphy,
 333                          "Unsupported or damaged EEPROM detected. "
 334                          "You may not be able to use all channels.\n");
 335
 336        max_channel_num = max_t(unsigned int, priv->output_limit->entries,
 337                                priv->iq_autocal_len);
 338        max_channel_num = max_t(unsigned int, max_channel_num,
 339                                priv->curve_data->entries);
 340
 341        list = kzalloc(sizeof(*list), GFP_KERNEL);
 342        if (!list) {
 343                ret = -ENOMEM;
 344                goto free;
 345        }
 346        priv->chan_num = max_channel_num;
 347        priv->survey = kzalloc(sizeof(struct survey_info) * max_channel_num,
 348                               GFP_KERNEL);
 349        if (!priv->survey) {
 350                ret = -ENOMEM;
 351                goto free;
 352        }
 353
 354        list->max_entries = max_channel_num;
 355        list->channels = kzalloc(sizeof(struct p54_channel_entry) *
 356                                 max_channel_num, GFP_KERNEL);
 357        if (!list->channels) {
 358                ret = -ENOMEM;
 359                goto free;
 360        }
 361
 362        for (i = 0; i < max_channel_num; i++) {
 363                if (i < priv->iq_autocal_len) {
 364                        freq = le16_to_cpu(priv->iq_autocal[i].freq);
 365                        p54_update_channel_param(list, freq, CHAN_HAS_CAL);
 366                }
 367
 368                if (i < priv->output_limit->entries) {
 369                        struct p54_channel_entry *tmp;
 370
 371                        void *data = (void *) ((unsigned long) i *
 372                                priv->output_limit->entry_size +
 373                                priv->output_limit->offset +
 374                                priv->output_limit->data);
 375
 376                        freq = le16_to_cpup((__le16 *) data);
 377                        tmp = p54_update_channel_param(list, freq,
 378                                                       CHAN_HAS_LIMIT);
 379                        if (tmp) {
 380                                tmp->max_power = p54_get_maxpower(priv, data);
 381                        }
 382                }
 383
 384                if (i < priv->curve_data->entries) {
 385                        freq = le16_to_cpup((__le16 *) (i *
 386                                            priv->curve_data->entry_size +
 387                                            priv->curve_data->offset +
 388                                            priv->curve_data->data));
 389
 390                        p54_update_channel_param(list, freq, CHAN_HAS_CURVE);
 391                }
 392        }
 393
 394        /* sort the channel list by frequency */
 395        sort(list->channels, list->entries, sizeof(struct p54_channel_entry),
 396             p54_compare_channels, NULL);
 397
 398        k = 0;
 399        for (i = 0, j = 0; i < IEEE80211_NUM_BANDS; i++) {
 400                if (p54_generate_band(dev, list, &k, i) == 0)
 401                        j++;
 402        }
 403        if (j == 0) {
 404                /* no useable band available. */
 405                ret = -EINVAL;
 406        }
 407
 408free:
 409        if (list) {
 410                kfree(list->channels);
 411                kfree(list);
 412        }
 413        if (ret) {
 414                kfree(priv->survey);
 415                priv->survey = NULL;
 416        }
 417
 418        return ret;
 419}
 420
 421static int p54_convert_rev0(struct ieee80211_hw *dev,
 422                            struct pda_pa_curve_data *curve_data)
 423{
 424        struct p54_common *priv = dev->priv;
 425        struct p54_pa_curve_data_sample *dst;
 426        struct pda_pa_curve_data_sample_rev0 *src;
 427        size_t cd_len = sizeof(*curve_data) +
 428                (curve_data->points_per_channel*sizeof(*dst) + 2) *
 429                 curve_data->channels;
 430        unsigned int i, j;
 431        void *source, *target;
 432
 433        priv->curve_data = kmalloc(sizeof(*priv->curve_data) + cd_len,
 434                                   GFP_KERNEL);
 435        if (!priv->curve_data)
 436                return -ENOMEM;
 437
 438        priv->curve_data->entries = curve_data->channels;
 439        priv->curve_data->entry_size = sizeof(__le16) +
 440                sizeof(*dst) * curve_data->points_per_channel;
 441        priv->curve_data->offset = offsetof(struct pda_pa_curve_data, data);
 442        priv->curve_data->len = cd_len;
 443        memcpy(priv->curve_data->data, curve_data, sizeof(*curve_data));
 444        source = curve_data->data;
 445        target = ((struct pda_pa_curve_data *) priv->curve_data->data)->data;
 446        for (i = 0; i < curve_data->channels; i++) {
 447                __le16 *freq = source;
 448                source += sizeof(__le16);
 449                *((__le16 *)target) = *freq;
 450                target += sizeof(__le16);
 451                for (j = 0; j < curve_data->points_per_channel; j++) {
 452                        dst = target;
 453                        src = source;
 454
 455                        dst->rf_power = src->rf_power;
 456                        dst->pa_detector = src->pa_detector;
 457                        dst->data_64qam = src->pcv;
 458                        /* "invent" the points for the other modulations */
 459#define SUB(x, y) (u8)(((x) - (y)) > (x) ? 0 : (x) - (y))
 460                        dst->data_16qam = SUB(src->pcv, 12);
 461                        dst->data_qpsk = SUB(dst->data_16qam, 12);
 462                        dst->data_bpsk = SUB(dst->data_qpsk, 12);
 463                        dst->data_barker = SUB(dst->data_bpsk, 14);
 464#undef SUB
 465                        target += sizeof(*dst);
 466                        source += sizeof(*src);
 467                }
 468        }
 469
 470        return 0;
 471}
 472
 473static int p54_convert_rev1(struct ieee80211_hw *dev,
 474                            struct pda_pa_curve_data *curve_data)
 475{
 476        struct p54_common *priv = dev->priv;
 477        struct p54_pa_curve_data_sample *dst;
 478        struct pda_pa_curve_data_sample_rev1 *src;
 479        size_t cd_len = sizeof(*curve_data) +
 480                (curve_data->points_per_channel*sizeof(*dst) + 2) *
 481                 curve_data->channels;
 482        unsigned int i, j;
 483        void *source, *target;
 484
 485        priv->curve_data = kzalloc(cd_len + sizeof(*priv->curve_data),
 486                                   GFP_KERNEL);
 487        if (!priv->curve_data)
 488                return -ENOMEM;
 489
 490        priv->curve_data->entries = curve_data->channels;
 491        priv->curve_data->entry_size = sizeof(__le16) +
 492                sizeof(*dst) * curve_data->points_per_channel;
 493        priv->curve_data->offset = offsetof(struct pda_pa_curve_data, data);
 494        priv->curve_data->len = cd_len;
 495        memcpy(priv->curve_data->data, curve_data, sizeof(*curve_data));
 496        source = curve_data->data;
 497        target = ((struct pda_pa_curve_data *) priv->curve_data->data)->data;
 498        for (i = 0; i < curve_data->channels; i++) {
 499                __le16 *freq = source;
 500                source += sizeof(__le16);
 501                *((__le16 *)target) = *freq;
 502                target += sizeof(__le16);
 503                for (j = 0; j < curve_data->points_per_channel; j++) {
 504                        memcpy(target, source, sizeof(*src));
 505
 506                        target += sizeof(*dst);
 507                        source += sizeof(*src);
 508                }
 509                source++;
 510        }
 511
 512        return 0;
 513}
 514
 515static const char *p54_rf_chips[] = { "INVALID-0", "Duette3", "Duette2",
 516        "Frisbee", "Xbow", "Longbow", "INVALID-6", "INVALID-7" };
 517
 518static int p54_parse_rssical(struct ieee80211_hw *dev,
 519                             u8 *data, int len, u16 type)
 520{
 521        struct p54_common *priv = dev->priv;
 522        struct p54_rssi_db_entry *entry;
 523        size_t db_len, entries;
 524        int offset = 0, i;
 525
 526        if (type != PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED) {
 527                entries = (type == PDR_RSSI_LINEAR_APPROXIMATION) ? 1 : 2;
 528                if (len != sizeof(struct pda_rssi_cal_entry) * entries) {
 529                        wiphy_err(dev->wiphy, "rssical size mismatch.\n");
 530                        goto err_data;
 531                }
 532        } else {
 533                /*
 534                 * Some devices (Dell 1450 USB, Xbow 5GHz card, etc...)
 535                 * have an empty two byte header.
 536                 */
 537                if (*((__le16 *)&data[offset]) == cpu_to_le16(0))
 538                        offset += 2;
 539
 540                entries = (len - offset) /
 541                        sizeof(struct pda_rssi_cal_ext_entry);
 542
 543                if (len < offset ||
 544                    (len - offset) % sizeof(struct pda_rssi_cal_ext_entry) ||
 545                    entries == 0) {
 546                        wiphy_err(dev->wiphy, "invalid rssi database.\n");
 547                        goto err_data;
 548                }
 549        }
 550
 551        db_len = sizeof(*entry) * entries;
 552        priv->rssi_db = kzalloc(db_len + sizeof(*priv->rssi_db), GFP_KERNEL);
 553        if (!priv->rssi_db)
 554                return -ENOMEM;
 555
 556        priv->rssi_db->offset = 0;
 557        priv->rssi_db->entries = entries;
 558        priv->rssi_db->entry_size = sizeof(*entry);
 559        priv->rssi_db->len = db_len;
 560
 561        entry = (void *)((unsigned long)priv->rssi_db->data + priv->rssi_db->offset);
 562        if (type == PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED) {
 563                struct pda_rssi_cal_ext_entry *cal = (void *) &data[offset];
 564
 565                for (i = 0; i < entries; i++) {
 566                        entry[i].freq = le16_to_cpu(cal[i].freq);
 567                        entry[i].mul = (s16) le16_to_cpu(cal[i].mul);
 568                        entry[i].add = (s16) le16_to_cpu(cal[i].add);
 569                }
 570        } else {
 571                struct pda_rssi_cal_entry *cal = (void *) &data[offset];
 572
 573                for (i = 0; i < entries; i++) {
 574                        u16 freq = 0;
 575                        switch (i) {
 576                        case IEEE80211_BAND_2GHZ:
 577                                freq = 2437;
 578                                break;
 579                        case IEEE80211_BAND_5GHZ:
 580                                freq = 5240;
 581                                break;
 582                        }
 583
 584                        entry[i].freq = freq;
 585                        entry[i].mul = (s16) le16_to_cpu(cal[i].mul);
 586                        entry[i].add = (s16) le16_to_cpu(cal[i].add);
 587                }
 588        }
 589
 590        /* sort the list by channel frequency */
 591        sort(entry, entries, sizeof(*entry), p54_compare_rssichan, NULL);
 592        return 0;
 593
 594err_data:
 595        wiphy_err(dev->wiphy,
 596                  "rssi calibration data packing type:(%x) len:%d.\n",
 597                  type, len);
 598
 599        print_hex_dump_bytes("rssical:", DUMP_PREFIX_NONE, data, len);
 600
 601        wiphy_err(dev->wiphy, "please report this issue.\n");
 602        return -EINVAL;
 603}
 604
 605struct p54_rssi_db_entry *p54_rssi_find(struct p54_common *priv, const u16 freq)
 606{
 607        struct p54_rssi_db_entry *entry;
 608        int i, found = -1;
 609
 610        if (!priv->rssi_db)
 611                return &p54_rssi_default;
 612
 613        entry = (void *)(priv->rssi_db->data + priv->rssi_db->offset);
 614        for (i = 0; i < priv->rssi_db->entries; i++) {
 615                if (!same_band(freq, entry[i].freq))
 616                        continue;
 617
 618                if (found == -1) {
 619                        found = i;
 620                        continue;
 621                }
 622
 623                /* nearest match */
 624                if (abs(freq - entry[i].freq) <
 625                    abs(freq - entry[found].freq)) {
 626                        found = i;
 627                        continue;
 628                } else {
 629                        break;
 630                }
 631        }
 632
 633        return found < 0 ? &p54_rssi_default : &entry[found];
 634}
 635
 636static void p54_parse_default_country(struct ieee80211_hw *dev,
 637                                      void *data, int len)
 638{
 639        struct pda_country *country;
 640
 641        if (len != sizeof(*country)) {
 642                wiphy_err(dev->wiphy,
 643                          "found possible invalid default country eeprom entry. (entry size: %d)\n",
 644                          len);
 645
 646                print_hex_dump_bytes("country:", DUMP_PREFIX_NONE,
 647                                     data, len);
 648
 649                wiphy_err(dev->wiphy, "please report this issue.\n");
 650                return;
 651        }
 652
 653        country = (struct pda_country *) data;
 654        if (country->flags == PDR_COUNTRY_CERT_CODE_PSEUDO)
 655                regulatory_hint(dev->wiphy, country->alpha2);
 656        else {
 657                /* TODO:
 658                 * write a shared/common function that converts
 659                 * "Regulatory domain codes" (802.11-2007 14.8.2.2)
 660                 * into ISO/IEC 3166-1 alpha2 for regulatory_hint.
 661                 */
 662        }
 663}
 664
 665static int p54_convert_output_limits(struct ieee80211_hw *dev,
 666                                     u8 *data, size_t len)
 667{
 668        struct p54_common *priv = dev->priv;
 669
 670        if (len < 2)
 671                return -EINVAL;
 672
 673        if (data[0] != 0) {
 674                wiphy_err(dev->wiphy, "unknown output power db revision:%x\n",
 675                          data[0]);
 676                return -EINVAL;
 677        }
 678
 679        if (2 + data[1] * sizeof(struct pda_channel_output_limit) > len)
 680                return -EINVAL;
 681
 682        priv->output_limit = kmalloc(data[1] *
 683                sizeof(struct pda_channel_output_limit) +
 684                sizeof(*priv->output_limit), GFP_KERNEL);
 685
 686        if (!priv->output_limit)
 687                return -ENOMEM;
 688
 689        priv->output_limit->offset = 0;
 690        priv->output_limit->entries = data[1];
 691        priv->output_limit->entry_size =
 692                sizeof(struct pda_channel_output_limit);
 693        priv->output_limit->len = priv->output_limit->entry_size *
 694                                  priv->output_limit->entries +
 695                                  priv->output_limit->offset;
 696
 697        memcpy(priv->output_limit->data, &data[2],
 698               data[1] * sizeof(struct pda_channel_output_limit));
 699
 700        return 0;
 701}
 702
 703static struct p54_cal_database *p54_convert_db(struct pda_custom_wrapper *src,
 704                                               size_t total_len)
 705{
 706        struct p54_cal_database *dst;
 707        size_t payload_len, entries, entry_size, offset;
 708
 709        payload_len = le16_to_cpu(src->len);
 710        entries = le16_to_cpu(src->entries);
 711        entry_size = le16_to_cpu(src->entry_size);
 712        offset = le16_to_cpu(src->offset);
 713        if (((entries * entry_size + offset) != payload_len) ||
 714             (payload_len + sizeof(*src) != total_len))
 715                return NULL;
 716
 717        dst = kmalloc(sizeof(*dst) + payload_len, GFP_KERNEL);
 718        if (!dst)
 719                return NULL;
 720
 721        dst->entries = entries;
 722        dst->entry_size = entry_size;
 723        dst->offset = offset;
 724        dst->len = payload_len;
 725
 726        memcpy(dst->data, src->data, payload_len);
 727        return dst;
 728}
 729
 730int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
 731{
 732        struct p54_common *priv = dev->priv;
 733        struct eeprom_pda_wrap *wrap;
 734        struct pda_entry *entry;
 735        unsigned int data_len, entry_len;
 736        void *tmp;
 737        int err;
 738        u8 *end = (u8 *)eeprom + len;
 739        u16 synth = 0;
 740        u16 crc16 = ~0;
 741
 742        wrap = (struct eeprom_pda_wrap *) eeprom;
 743        entry = (void *)wrap->data + le16_to_cpu(wrap->len);
 744
 745        /* verify that at least the entry length/code fits */
 746        while ((u8 *)entry <= end - sizeof(*entry)) {
 747                entry_len = le16_to_cpu(entry->len);
 748                data_len = ((entry_len - 1) << 1);
 749
 750                /* abort if entry exceeds whole structure */
 751                if ((u8 *)entry + sizeof(*entry) + data_len > end)
 752                        break;
 753
 754                switch (le16_to_cpu(entry->code)) {
 755                case PDR_MAC_ADDRESS:
 756                        if (data_len != ETH_ALEN)
 757                                break;
 758                        SET_IEEE80211_PERM_ADDR(dev, entry->data);
 759                        break;
 760                case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS:
 761                        if (priv->output_limit)
 762                                break;
 763                        err = p54_convert_output_limits(dev, entry->data,
 764                                                        data_len);
 765                        if (err)
 766                                goto err;
 767                        break;
 768                case PDR_PRISM_PA_CAL_CURVE_DATA: {
 769                        struct pda_pa_curve_data *curve_data =
 770                                (struct pda_pa_curve_data *)entry->data;
 771                        if (data_len < sizeof(*curve_data)) {
 772                                err = -EINVAL;
 773                                goto err;
 774                        }
 775
 776                        switch (curve_data->cal_method_rev) {
 777                        case 0:
 778                                err = p54_convert_rev0(dev, curve_data);
 779                                break;
 780                        case 1:
 781                                err = p54_convert_rev1(dev, curve_data);
 782                                break;
 783                        default:
 784                                wiphy_err(dev->wiphy,
 785                                          "unknown curve data revision %d\n",
 786                                          curve_data->cal_method_rev);
 787                                err = -ENODEV;
 788                                break;
 789                        }
 790                        if (err)
 791                                goto err;
 792                        }
 793                        break;
 794                case PDR_PRISM_ZIF_TX_IQ_CALIBRATION:
 795                        priv->iq_autocal = kmemdup(entry->data, data_len,
 796                                                   GFP_KERNEL);
 797                        if (!priv->iq_autocal) {
 798                                err = -ENOMEM;
 799                                goto err;
 800                        }
 801
 802                        priv->iq_autocal_len = data_len / sizeof(struct pda_iq_autocal_entry);
 803                        break;
 804                case PDR_DEFAULT_COUNTRY:
 805                        p54_parse_default_country(dev, entry->data, data_len);
 806                        break;
 807                case PDR_INTERFACE_LIST:
 808                        tmp = entry->data;
 809                        while ((u8 *)tmp < entry->data + data_len) {
 810                                struct exp_if *exp_if = tmp;
 811                                if (exp_if->if_id == cpu_to_le16(IF_ID_ISL39000))
 812                                        synth = le16_to_cpu(exp_if->variant);
 813                                tmp += sizeof(*exp_if);
 814                        }
 815                        break;
 816                case PDR_HARDWARE_PLATFORM_COMPONENT_ID:
 817                        if (data_len < 2)
 818                                break;
 819                        priv->version = *(u8 *)(entry->data + 1);
 820                        break;
 821                case PDR_RSSI_LINEAR_APPROXIMATION:
 822                case PDR_RSSI_LINEAR_APPROXIMATION_DUAL_BAND:
 823                case PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED:
 824                        err = p54_parse_rssical(dev, entry->data, data_len,
 825                                                le16_to_cpu(entry->code));
 826                        if (err)
 827                                goto err;
 828                        break;
 829                case PDR_RSSI_LINEAR_APPROXIMATION_CUSTOMV2: {
 830                        struct pda_custom_wrapper *pda = (void *) entry->data;
 831                        __le16 *src;
 832                        u16 *dst;
 833                        int i;
 834
 835                        if (priv->rssi_db || data_len < sizeof(*pda))
 836                                break;
 837
 838                        priv->rssi_db = p54_convert_db(pda, data_len);
 839                        if (!priv->rssi_db)
 840                                break;
 841
 842                        src = (void *) priv->rssi_db->data;
 843                        dst = (void *) priv->rssi_db->data;
 844
 845                        for (i = 0; i < priv->rssi_db->entries; i++)
 846                                *(dst++) = (s16) le16_to_cpu(*(src++));
 847
 848                        }
 849                        break;
 850                case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS_CUSTOM: {
 851                        struct pda_custom_wrapper *pda = (void *) entry->data;
 852                        if (priv->output_limit || data_len < sizeof(*pda))
 853                                break;
 854                        priv->output_limit = p54_convert_db(pda, data_len);
 855                        }
 856                        break;
 857                case PDR_PRISM_PA_CAL_CURVE_DATA_CUSTOM: {
 858                        struct pda_custom_wrapper *pda = (void *) entry->data;
 859                        if (priv->curve_data || data_len < sizeof(*pda))
 860                                break;
 861                        priv->curve_data = p54_convert_db(pda, data_len);
 862                        }
 863                        break;
 864                case PDR_END:
 865                        crc16 = ~crc_ccitt(crc16, (u8 *) entry, sizeof(*entry));
 866                        if (crc16 != le16_to_cpup((__le16 *)entry->data)) {
 867                                wiphy_err(dev->wiphy, "eeprom failed checksum "
 868                                         "test!\n");
 869                                err = -ENOMSG;
 870                                goto err;
 871                        } else {
 872                                goto good_eeprom;
 873                        }
 874                        break;
 875                default:
 876                        break;
 877                }
 878
 879                crc16 = crc_ccitt(crc16, (u8 *)entry, (entry_len + 1) * 2);
 880                entry = (void *)entry + (entry_len + 1) * 2;
 881        }
 882
 883        wiphy_err(dev->wiphy, "unexpected end of eeprom data.\n");
 884        err = -ENODATA;
 885        goto err;
 886
 887good_eeprom:
 888        if (!synth || !priv->iq_autocal || !priv->output_limit ||
 889            !priv->curve_data) {
 890                wiphy_err(dev->wiphy,
 891                          "not all required entries found in eeprom!\n");
 892                err = -EINVAL;
 893                goto err;
 894        }
 895
 896        priv->rxhw = synth & PDR_SYNTH_FRONTEND_MASK;
 897
 898        err = p54_generate_channel_lists(dev);
 899        if (err)
 900                goto err;
 901
 902        if (priv->rxhw == PDR_SYNTH_FRONTEND_XBOW)
 903                p54_init_xbow_synth(priv);
 904        if (!(synth & PDR_SYNTH_24_GHZ_DISABLED))
 905                dev->wiphy->bands[IEEE80211_BAND_2GHZ] =
 906                        priv->band_table[IEEE80211_BAND_2GHZ];
 907        if (!(synth & PDR_SYNTH_5_GHZ_DISABLED))
 908                dev->wiphy->bands[IEEE80211_BAND_5GHZ] =
 909                        priv->band_table[IEEE80211_BAND_5GHZ];
 910        if ((synth & PDR_SYNTH_RX_DIV_MASK) == PDR_SYNTH_RX_DIV_SUPPORTED)
 911                priv->rx_diversity_mask = 3;
 912        if ((synth & PDR_SYNTH_TX_DIV_MASK) == PDR_SYNTH_TX_DIV_SUPPORTED)
 913                priv->tx_diversity_mask = 3;
 914
 915        if (!is_valid_ether_addr(dev->wiphy->perm_addr)) {
 916                u8 perm_addr[ETH_ALEN];
 917
 918                wiphy_warn(dev->wiphy,
 919                           "Invalid hwaddr! Using randomly generated MAC addr\n");
 920                eth_random_addr(perm_addr);
 921                SET_IEEE80211_PERM_ADDR(dev, perm_addr);
 922        }
 923
 924        priv->cur_rssi = &p54_rssi_default;
 925
 926        wiphy_info(dev->wiphy, "hwaddr %pM, MAC:isl38%02x RF:%s\n",
 927                   dev->wiphy->perm_addr, priv->version,
 928                   p54_rf_chips[priv->rxhw]);
 929
 930        return 0;
 931
 932err:
 933        kfree(priv->iq_autocal);
 934        kfree(priv->output_limit);
 935        kfree(priv->curve_data);
 936        kfree(priv->rssi_db);
 937        kfree(priv->survey);
 938        priv->iq_autocal = NULL;
 939        priv->output_limit = NULL;
 940        priv->curve_data = NULL;
 941        priv->rssi_db = NULL;
 942        priv->survey = NULL;
 943
 944        wiphy_err(dev->wiphy, "eeprom parse failed!\n");
 945        return err;
 946}
 947EXPORT_SYMBOL_GPL(p54_parse_eeprom);
 948
 949int p54_read_eeprom(struct ieee80211_hw *dev)
 950{
 951        struct p54_common *priv = dev->priv;
 952        size_t eeprom_size = 0x2020, offset = 0, blocksize, maxblocksize;
 953        int ret = -ENOMEM;
 954        void *eeprom;
 955
 956        maxblocksize = EEPROM_READBACK_LEN;
 957        if (priv->fw_var >= 0x509)
 958                maxblocksize -= 0xc;
 959        else
 960                maxblocksize -= 0x4;
 961
 962        eeprom = kzalloc(eeprom_size, GFP_KERNEL);
 963        if (unlikely(!eeprom))
 964                goto free;
 965
 966        while (eeprom_size) {
 967                blocksize = min(eeprom_size, maxblocksize);
 968                ret = p54_download_eeprom(priv, eeprom + offset,
 969                                          offset, blocksize);
 970                if (unlikely(ret))
 971                        goto free;
 972
 973                offset += blocksize;
 974                eeprom_size -= blocksize;
 975        }
 976
 977        ret = p54_parse_eeprom(dev, eeprom, offset);
 978free:
 979        kfree(eeprom);
 980        return ret;
 981}
 982EXPORT_SYMBOL_GPL(p54_read_eeprom);
 983