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