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); 985