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(sizeof(*tmp), GFP_KERNEL); 158 if (!tmp) 159 goto err_out; 160 161 tmp->channels = kcalloc(list->band_channel_num[band], 162 sizeof(struct ieee80211_channel), 163 GFP_KERNEL); 164 if (!tmp->channels) 165 goto err_out; 166 167 ret = p54_fill_band_bitrates(dev, tmp, band); 168 if (ret) 169 goto err_out; 170 171 for (i = 0, j = 0; (j < list->band_channel_num[band]) && 172 (i < list->entries); i++) { 173 struct p54_channel_entry *chan = &list->channels[i]; 174 struct ieee80211_channel *dest = &tmp->channels[j]; 175 176 if (chan->band != band) 177 continue; 178 179 if (chan->data != CHAN_HAS_ALL) { 180 wiphy_err(dev->wiphy, "%s%s%s is/are missing for " 181 "channel:%d [%d MHz].\n", 182 (chan->data & CHAN_HAS_CAL ? "" : 183 " [iqauto calibration data]"), 184 (chan->data & CHAN_HAS_LIMIT ? "" : 185 " [output power limits]"), 186 (chan->data & CHAN_HAS_CURVE ? "" : 187 " [curve data]"), 188 chan->index, chan->freq); 189 continue; 190 } 191 192 dest->band = chan->band; 193 dest->center_freq = chan->freq; 194 dest->max_power = chan->max_power; 195 priv->survey[*chan_num].channel = &tmp->channels[j]; 196 priv->survey[*chan_num].filled = SURVEY_INFO_NOISE_DBM | 197 SURVEY_INFO_TIME | 198 SURVEY_INFO_TIME_BUSY | 199 SURVEY_INFO_TIME_TX; 200 dest->hw_value = (*chan_num); 201 j++; 202 (*chan_num)++; 203 } 204 205 if (j == 0) { 206 wiphy_err(dev->wiphy, "Disabling totally damaged %d GHz band\n", 207 (band == NL80211_BAND_2GHZ) ? 2 : 5); 208 209 ret = -ENODATA; 210 goto err_out; 211 } 212 213 tmp->n_channels = j; 214 old = priv->band_table[band]; 215 priv->band_table[band] = tmp; 216 if (old) { 217 kfree(old->channels); 218 kfree(old); 219 } 220 221 return 0; 222 223 err_out: 224 if (tmp) { 225 kfree(tmp->channels); 226 kfree(tmp); 227 } 228 229 return ret; 230 } 231 232 static struct p54_channel_entry *p54_update_channel_param(struct p54_channel_list *list, 233 u16 freq, u16 data) 234 { 235 int i; 236 struct p54_channel_entry *entry = NULL; 237 238 /* 239 * usually all lists in the eeprom are mostly sorted. 240 * so it's very likely that the entry we are looking for 241 * is right at the end of the list 242 */ 243 for (i = list->entries; i >= 0; i--) { 244 if (freq == list->channels[i].freq) { 245 entry = &list->channels[i]; 246 break; 247 } 248 } 249 250 if ((i < 0) && (list->entries < list->max_entries)) { 251 /* entry does not exist yet. Initialize a new one. */ 252 int band = p54_get_band_from_freq(freq); 253 254 /* 255 * filter out frequencies which don't belong into 256 * any supported band. 257 */ 258 if (band >= 0) { 259 i = list->entries++; 260 list->band_channel_num[band]++; 261 262 entry = &list->channels[i]; 263 entry->freq = freq; 264 entry->band = band; 265 entry->index = ieee80211_frequency_to_channel(freq); 266 entry->max_power = 0; 267 entry->data = 0; 268 } 269 } 270 271 if (entry) 272 entry->data |= data; 273 274 return entry; 275 } 276 277 static int p54_get_maxpower(struct p54_common *priv, void *data) 278 { 279 switch (priv->rxhw & PDR_SYNTH_FRONTEND_MASK) { 280 case PDR_SYNTH_FRONTEND_LONGBOW: { 281 struct pda_channel_output_limit_longbow *pda = data; 282 int j; 283 u16 rawpower = 0; 284 pda = data; 285 for (j = 0; j < ARRAY_SIZE(pda->point); j++) { 286 struct pda_channel_output_limit_point_longbow *point = 287 &pda->point[j]; 288 rawpower = max_t(u16, 289 rawpower, le16_to_cpu(point->val_qpsk)); 290 rawpower = max_t(u16, 291 rawpower, le16_to_cpu(point->val_bpsk)); 292 rawpower = max_t(u16, 293 rawpower, le16_to_cpu(point->val_16qam)); 294 rawpower = max_t(u16, 295 rawpower, le16_to_cpu(point->val_64qam)); 296 } 297 /* longbow seems to use 1/16 dBm units */ 298 return rawpower / 16; 299 } 300 301 case PDR_SYNTH_FRONTEND_DUETTE3: 302 case PDR_SYNTH_FRONTEND_DUETTE2: 303 case PDR_SYNTH_FRONTEND_FRISBEE: 304 case PDR_SYNTH_FRONTEND_XBOW: { 305 struct pda_channel_output_limit *pda = data; 306 u8 rawpower = 0; 307 rawpower = max(rawpower, pda->val_qpsk); 308 rawpower = max(rawpower, pda->val_bpsk); 309 rawpower = max(rawpower, pda->val_16qam); 310 rawpower = max(rawpower, pda->val_64qam); 311 /* raw values are in 1/4 dBm units */ 312 return rawpower / 4; 313 } 314 315 default: 316 return 20; 317 } 318 } 319 320 static int p54_generate_channel_lists(struct ieee80211_hw *dev) 321 { 322 struct p54_common *priv = dev->priv; 323 struct p54_channel_list *list; 324 unsigned int i, j, k, max_channel_num; 325 int ret = 0; 326 u16 freq; 327 328 if ((priv->iq_autocal_len != priv->curve_data->entries) || 329 (priv->iq_autocal_len != priv->output_limit->entries)) 330 wiphy_err(dev->wiphy, 331 "Unsupported or damaged EEPROM detected. " 332 "You may not be able to use all channels.\n"); 333 334 max_channel_num = max_t(unsigned int, priv->output_limit->entries, 335 priv->iq_autocal_len); 336 max_channel_num = max_t(unsigned int, max_channel_num, 337 priv->curve_data->entries); 338 339 list = kzalloc(sizeof(*list), GFP_KERNEL); 340 if (!list) { 341 ret = -ENOMEM; 342 goto free; 343 } 344 priv->chan_num = max_channel_num; 345 priv->survey = kcalloc(max_channel_num, sizeof(struct survey_info), 346 GFP_KERNEL); 347 if (!priv->survey) { 348 ret = -ENOMEM; 349 goto free; 350 } 351 352 list->max_entries = max_channel_num; 353 list->channels = kcalloc(max_channel_num, 354 sizeof(struct p54_channel_entry), 355 GFP_KERNEL); 356 if (!list->channels) { 357 ret = -ENOMEM; 358 goto free; 359 } 360 361 for (i = 0; i < max_channel_num; i++) { 362 if (i < priv->iq_autocal_len) { 363 freq = le16_to_cpu(priv->iq_autocal[i].freq); 364 p54_update_channel_param(list, freq, CHAN_HAS_CAL); 365 } 366 367 if (i < priv->output_limit->entries) { 368 struct p54_channel_entry *tmp; 369 370 void *data = (void *) ((unsigned long) i * 371 priv->output_limit->entry_size + 372 priv->output_limit->offset + 373 priv->output_limit->data); 374 375 freq = le16_to_cpup((__le16 *) data); 376 tmp = p54_update_channel_param(list, freq, 377 CHAN_HAS_LIMIT); 378 if (tmp) { 379 tmp->max_power = p54_get_maxpower(priv, data); 380 } 381 } 382 383 if (i < priv->curve_data->entries) { 384 freq = le16_to_cpup((__le16 *) (i * 385 priv->curve_data->entry_size + 386 priv->curve_data->offset + 387 priv->curve_data->data)); 388 389 p54_update_channel_param(list, freq, CHAN_HAS_CURVE); 390 } 391 } 392 393 /* sort the channel list by frequency */ 394 sort(list->channels, list->entries, sizeof(struct p54_channel_entry), 395 p54_compare_channels, NULL); 396 397 k = 0; 398 for (i = 0, j = 0; i < NUM_NL80211_BANDS; i++) { 399 if (p54_generate_band(dev, list, &k, i) == 0) 400 j++; 401 } 402 if (j == 0) { 403 /* no useable band available. */ 404 ret = -EINVAL; 405 } 406 407 free: 408 if (list) { 409 kfree(list->channels); 410 kfree(list); 411 } 412 if (ret) { 413 kfree(priv->survey); 414 priv->survey = NULL; 415 } 416 417 return ret; 418 } 419 420 static int p54_convert_rev0(struct ieee80211_hw *dev, 421 struct pda_pa_curve_data *curve_data) 422 { 423 struct p54_common *priv = dev->priv; 424 struct p54_pa_curve_data_sample *dst; 425 struct pda_pa_curve_data_sample_rev0 *src; 426 size_t cd_len = sizeof(*curve_data) + 427 (curve_data->points_per_channel*sizeof(*dst) + 2) * 428 curve_data->channels; 429 unsigned int i, j; 430 void *source, *target; 431 432 priv->curve_data = kmalloc(sizeof(*priv->curve_data) + cd_len, 433 GFP_KERNEL); 434 if (!priv->curve_data) 435 return -ENOMEM; 436 437 priv->curve_data->entries = curve_data->channels; 438 priv->curve_data->entry_size = sizeof(__le16) + 439 sizeof(*dst) * curve_data->points_per_channel; 440 priv->curve_data->offset = offsetof(struct pda_pa_curve_data, data); 441 priv->curve_data->len = cd_len; 442 memcpy(priv->curve_data->data, curve_data, sizeof(*curve_data)); 443 source = curve_data->data; 444 target = ((struct pda_pa_curve_data *) priv->curve_data->data)->data; 445 for (i = 0; i < curve_data->channels; i++) { 446 __le16 *freq = source; 447 source += sizeof(__le16); 448 *((__le16 *)target) = *freq; 449 target += sizeof(__le16); 450 for (j = 0; j < curve_data->points_per_channel; j++) { 451 dst = target; 452 src = source; 453 454 dst->rf_power = src->rf_power; 455 dst->pa_detector = src->pa_detector; 456 dst->data_64qam = src->pcv; 457 /* "invent" the points for the other modulations */ 458 #define SUB(x, y) (u8)(((x) - (y)) > (x) ? 0 : (x) - (y)) 459 dst->data_16qam = SUB(src->pcv, 12); 460 dst->data_qpsk = SUB(dst->data_16qam, 12); 461 dst->data_bpsk = SUB(dst->data_qpsk, 12); 462 dst->data_barker = SUB(dst->data_bpsk, 14); 463 #undef SUB 464 target += sizeof(*dst); 465 source += sizeof(*src); 466 } 467 } 468 469 return 0; 470 } 471 472 static int p54_convert_rev1(struct ieee80211_hw *dev, 473 struct pda_pa_curve_data *curve_data) 474 { 475 struct p54_common *priv = dev->priv; 476 struct p54_pa_curve_data_sample *dst; 477 struct pda_pa_curve_data_sample_rev1 *src; 478 size_t cd_len = sizeof(*curve_data) + 479 (curve_data->points_per_channel*sizeof(*dst) + 2) * 480 curve_data->channels; 481 unsigned int i, j; 482 void *source, *target; 483 484 priv->curve_data = kzalloc(cd_len + sizeof(*priv->curve_data), 485 GFP_KERNEL); 486 if (!priv->curve_data) 487 return -ENOMEM; 488 489 priv->curve_data->entries = curve_data->channels; 490 priv->curve_data->entry_size = sizeof(__le16) + 491 sizeof(*dst) * curve_data->points_per_channel; 492 priv->curve_data->offset = offsetof(struct pda_pa_curve_data, data); 493 priv->curve_data->len = cd_len; 494 memcpy(priv->curve_data->data, curve_data, sizeof(*curve_data)); 495 source = curve_data->data; 496 target = ((struct pda_pa_curve_data *) priv->curve_data->data)->data; 497 for (i = 0; i < curve_data->channels; i++) { 498 __le16 *freq = source; 499 source += sizeof(__le16); 500 *((__le16 *)target) = *freq; 501 target += sizeof(__le16); 502 for (j = 0; j < curve_data->points_per_channel; j++) { 503 memcpy(target, source, sizeof(*src)); 504 505 target += sizeof(*dst); 506 source += sizeof(*src); 507 } 508 source++; 509 } 510 511 return 0; 512 } 513 514 static const char *p54_rf_chips[] = { "INVALID-0", "Duette3", "Duette2", 515 "Frisbee", "Xbow", "Longbow", "INVALID-6", "INVALID-7" }; 516 517 static int p54_parse_rssical(struct ieee80211_hw *dev, 518 u8 *data, int len, u16 type) 519 { 520 struct p54_common *priv = dev->priv; 521 struct p54_rssi_db_entry *entry; 522 size_t db_len, entries; 523 int offset = 0, i; 524 525 if (type != PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED) { 526 entries = (type == PDR_RSSI_LINEAR_APPROXIMATION) ? 1 : 2; 527 if (len != sizeof(struct pda_rssi_cal_entry) * entries) { 528 wiphy_err(dev->wiphy, "rssical size mismatch.\n"); 529 goto err_data; 530 } 531 } else { 532 /* 533 * Some devices (Dell 1450 USB, Xbow 5GHz card, etc...) 534 * have an empty two byte header. 535 */ 536 if (*((__le16 *)&data[offset]) == cpu_to_le16(0)) 537 offset += 2; 538 539 entries = (len - offset) / 540 sizeof(struct pda_rssi_cal_ext_entry); 541 542 if (len < offset || 543 (len - offset) % sizeof(struct pda_rssi_cal_ext_entry) || 544 entries == 0) { 545 wiphy_err(dev->wiphy, "invalid rssi database.\n"); 546 goto err_data; 547 } 548 } 549 550 db_len = sizeof(*entry) * entries; 551 priv->rssi_db = kzalloc(db_len + sizeof(*priv->rssi_db), GFP_KERNEL); 552 if (!priv->rssi_db) 553 return -ENOMEM; 554 555 priv->rssi_db->offset = 0; 556 priv->rssi_db->entries = entries; 557 priv->rssi_db->entry_size = sizeof(*entry); 558 priv->rssi_db->len = db_len; 559 560 entry = (void *)((unsigned long)priv->rssi_db->data + priv->rssi_db->offset); 561 if (type == PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED) { 562 struct pda_rssi_cal_ext_entry *cal = (void *) &data[offset]; 563 564 for (i = 0; i < entries; i++) { 565 entry[i].freq = le16_to_cpu(cal[i].freq); 566 entry[i].mul = (s16) le16_to_cpu(cal[i].mul); 567 entry[i].add = (s16) le16_to_cpu(cal[i].add); 568 } 569 } else { 570 struct pda_rssi_cal_entry *cal = (void *) &data[offset]; 571 572 for (i = 0; i < entries; i++) { 573 u16 freq = 0; 574 switch (i) { 575 case NL80211_BAND_2GHZ: 576 freq = 2437; 577 break; 578 case NL80211_BAND_5GHZ: 579 freq = 5240; 580 break; 581 } 582 583 entry[i].freq = freq; 584 entry[i].mul = (s16) le16_to_cpu(cal[i].mul); 585 entry[i].add = (s16) le16_to_cpu(cal[i].add); 586 } 587 } 588 589 /* sort the list by channel frequency */ 590 sort(entry, entries, sizeof(*entry), p54_compare_rssichan, NULL); 591 return 0; 592 593 err_data: 594 wiphy_err(dev->wiphy, 595 "rssi calibration data packing type:(%x) len:%d.\n", 596 type, len); 597 598 print_hex_dump_bytes("rssical:", DUMP_PREFIX_NONE, data, len); 599 600 wiphy_err(dev->wiphy, "please report this issue.\n"); 601 return -EINVAL; 602 } 603 604 struct p54_rssi_db_entry *p54_rssi_find(struct p54_common *priv, const u16 freq) 605 { 606 struct p54_rssi_db_entry *entry; 607 int i, found = -1; 608 609 if (!priv->rssi_db) 610 return &p54_rssi_default; 611 612 entry = (void *)(priv->rssi_db->data + priv->rssi_db->offset); 613 for (i = 0; i < priv->rssi_db->entries; i++) { 614 if (!same_band(freq, entry[i].freq)) 615 continue; 616 617 if (found == -1) { 618 found = i; 619 continue; 620 } 621 622 /* nearest match */ 623 if (abs(freq - entry[i].freq) < 624 abs(freq - entry[found].freq)) { 625 found = i; 626 continue; 627 } else { 628 break; 629 } 630 } 631 632 return found < 0 ? &p54_rssi_default : &entry[found]; 633 } 634 635 static void p54_parse_default_country(struct ieee80211_hw *dev, 636 void *data, int len) 637 { 638 struct pda_country *country; 639 640 if (len != sizeof(*country)) { 641 wiphy_err(dev->wiphy, 642 "found possible invalid default country eeprom entry. (entry size: %d)\n", 643 len); 644 645 print_hex_dump_bytes("country:", DUMP_PREFIX_NONE, 646 data, len); 647 648 wiphy_err(dev->wiphy, "please report this issue.\n"); 649 return; 650 } 651 652 country = (struct pda_country *) data; 653 if (country->flags == PDR_COUNTRY_CERT_CODE_PSEUDO) 654 regulatory_hint(dev->wiphy, country->alpha2); 655 else { 656 /* TODO: 657 * write a shared/common function that converts 658 * "Regulatory domain codes" (802.11-2007 14.8.2.2) 659 * into ISO/IEC 3166-1 alpha2 for regulatory_hint. 660 */ 661 } 662 } 663 664 static int p54_convert_output_limits(struct ieee80211_hw *dev, 665 u8 *data, size_t len) 666 { 667 struct p54_common *priv = dev->priv; 668 669 if (len < 2) 670 return -EINVAL; 671 672 if (data[0] != 0) { 673 wiphy_err(dev->wiphy, "unknown output power db revision:%x\n", 674 data[0]); 675 return -EINVAL; 676 } 677 678 if (2 + data[1] * sizeof(struct pda_channel_output_limit) > len) 679 return -EINVAL; 680 681 priv->output_limit = kmalloc(data[1] * 682 sizeof(struct pda_channel_output_limit) + 683 sizeof(*priv->output_limit), GFP_KERNEL); 684 685 if (!priv->output_limit) 686 return -ENOMEM; 687 688 priv->output_limit->offset = 0; 689 priv->output_limit->entries = data[1]; 690 priv->output_limit->entry_size = 691 sizeof(struct pda_channel_output_limit); 692 priv->output_limit->len = priv->output_limit->entry_size * 693 priv->output_limit->entries + 694 priv->output_limit->offset; 695 696 memcpy(priv->output_limit->data, &data[2], 697 data[1] * sizeof(struct pda_channel_output_limit)); 698 699 return 0; 700 } 701 702 static struct p54_cal_database *p54_convert_db(struct pda_custom_wrapper *src, 703 size_t total_len) 704 { 705 struct p54_cal_database *dst; 706 size_t payload_len, entries, entry_size, offset; 707 708 payload_len = le16_to_cpu(src->len); 709 entries = le16_to_cpu(src->entries); 710 entry_size = le16_to_cpu(src->entry_size); 711 offset = le16_to_cpu(src->offset); 712 if (((entries * entry_size + offset) != payload_len) || 713 (payload_len + sizeof(*src) != total_len)) 714 return NULL; 715 716 dst = kmalloc(sizeof(*dst) + payload_len, GFP_KERNEL); 717 if (!dst) 718 return NULL; 719 720 dst->entries = entries; 721 dst->entry_size = entry_size; 722 dst->offset = offset; 723 dst->len = payload_len; 724 725 memcpy(dst->data, src->data, payload_len); 726 return dst; 727 } 728 729 int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len) 730 { 731 struct p54_common *priv = dev->priv; 732 struct eeprom_pda_wrap *wrap; 733 struct pda_entry *entry; 734 unsigned int data_len, entry_len; 735 void *tmp; 736 int err; 737 u8 *end = (u8 *)eeprom + len; 738 u16 synth = 0; 739 u16 crc16 = ~0; 740 741 wrap = (struct eeprom_pda_wrap *) eeprom; 742 entry = (void *)wrap->data + le16_to_cpu(wrap->len); 743 744 /* verify that at least the entry length/code fits */ 745 while ((u8 *)entry <= end - sizeof(*entry)) { 746 entry_len = le16_to_cpu(entry->len); 747 data_len = ((entry_len - 1) << 1); 748 749 /* abort if entry exceeds whole structure */ 750 if ((u8 *)entry + sizeof(*entry) + data_len > end) 751 break; 752 753 switch (le16_to_cpu(entry->code)) { 754 case PDR_MAC_ADDRESS: 755 if (data_len != ETH_ALEN) 756 break; 757 SET_IEEE80211_PERM_ADDR(dev, entry->data); 758 break; 759 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS: 760 if (priv->output_limit) 761 break; 762 err = p54_convert_output_limits(dev, entry->data, 763 data_len); 764 if (err) 765 goto err; 766 break; 767 case PDR_PRISM_PA_CAL_CURVE_DATA: { 768 struct pda_pa_curve_data *curve_data = 769 (struct pda_pa_curve_data *)entry->data; 770 if (data_len < sizeof(*curve_data)) { 771 err = -EINVAL; 772 goto err; 773 } 774 775 switch (curve_data->cal_method_rev) { 776 case 0: 777 err = p54_convert_rev0(dev, curve_data); 778 break; 779 case 1: 780 err = p54_convert_rev1(dev, curve_data); 781 break; 782 default: 783 wiphy_err(dev->wiphy, 784 "unknown curve data revision %d\n", 785 curve_data->cal_method_rev); 786 err = -ENODEV; 787 break; 788 } 789 if (err) 790 goto err; 791 } 792 break; 793 case PDR_PRISM_ZIF_TX_IQ_CALIBRATION: 794 priv->iq_autocal = kmemdup(entry->data, data_len, 795 GFP_KERNEL); 796 if (!priv->iq_autocal) { 797 err = -ENOMEM; 798 goto err; 799 } 800 801 priv->iq_autocal_len = data_len / sizeof(struct pda_iq_autocal_entry); 802 break; 803 case PDR_DEFAULT_COUNTRY: 804 p54_parse_default_country(dev, entry->data, data_len); 805 break; 806 case PDR_INTERFACE_LIST: 807 tmp = entry->data; 808 while ((u8 *)tmp < entry->data + data_len) { 809 struct exp_if *exp_if = tmp; 810 if (exp_if->if_id == cpu_to_le16(IF_ID_ISL39000)) 811 synth = le16_to_cpu(exp_if->variant); 812 tmp += sizeof(*exp_if); 813 } 814 break; 815 case PDR_HARDWARE_PLATFORM_COMPONENT_ID: 816 if (data_len < 2) 817 break; 818 priv->version = *(u8 *)(entry->data + 1); 819 break; 820 case PDR_RSSI_LINEAR_APPROXIMATION: 821 case PDR_RSSI_LINEAR_APPROXIMATION_DUAL_BAND: 822 case PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED: 823 err = p54_parse_rssical(dev, entry->data, data_len, 824 le16_to_cpu(entry->code)); 825 if (err) 826 goto err; 827 break; 828 case PDR_RSSI_LINEAR_APPROXIMATION_CUSTOMV2: { 829 struct pda_custom_wrapper *pda = (void *) entry->data; 830 __le16 *src; 831 u16 *dst; 832 int i; 833 834 if (priv->rssi_db || data_len < sizeof(*pda)) 835 break; 836 837 priv->rssi_db = p54_convert_db(pda, data_len); 838 if (!priv->rssi_db) 839 break; 840 841 src = (void *) priv->rssi_db->data; 842 dst = (void *) priv->rssi_db->data; 843 844 for (i = 0; i < priv->rssi_db->entries; i++) 845 *(dst++) = (s16) le16_to_cpu(*(src++)); 846 847 } 848 break; 849 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS_CUSTOM: { 850 struct pda_custom_wrapper *pda = (void *) entry->data; 851 if (priv->output_limit || data_len < sizeof(*pda)) 852 break; 853 priv->output_limit = p54_convert_db(pda, data_len); 854 } 855 break; 856 case PDR_PRISM_PA_CAL_CURVE_DATA_CUSTOM: { 857 struct pda_custom_wrapper *pda = (void *) entry->data; 858 if (priv->curve_data || data_len < sizeof(*pda)) 859 break; 860 priv->curve_data = p54_convert_db(pda, data_len); 861 } 862 break; 863 case PDR_END: 864 crc16 = ~crc_ccitt(crc16, (u8 *) entry, sizeof(*entry)); 865 if (crc16 != le16_to_cpup((__le16 *)entry->data)) { 866 wiphy_err(dev->wiphy, "eeprom failed checksum " 867 "test!\n"); 868 err = -ENOMSG; 869 goto err; 870 } else { 871 goto good_eeprom; 872 } 873 break; 874 default: 875 break; 876 } 877 878 crc16 = crc_ccitt(crc16, (u8 *)entry, (entry_len + 1) * 2); 879 entry = (void *)entry + (entry_len + 1) * 2; 880 } 881 882 wiphy_err(dev->wiphy, "unexpected end of eeprom data.\n"); 883 err = -ENODATA; 884 goto err; 885 886 good_eeprom: 887 if (!synth || !priv->iq_autocal || !priv->output_limit || 888 !priv->curve_data) { 889 wiphy_err(dev->wiphy, 890 "not all required entries found in eeprom!\n"); 891 err = -EINVAL; 892 goto err; 893 } 894 895 priv->rxhw = synth & PDR_SYNTH_FRONTEND_MASK; 896 897 err = p54_generate_channel_lists(dev); 898 if (err) 899 goto err; 900 901 if (priv->rxhw == PDR_SYNTH_FRONTEND_XBOW) 902 p54_init_xbow_synth(priv); 903 if (!(synth & PDR_SYNTH_24_GHZ_DISABLED)) 904 dev->wiphy->bands[NL80211_BAND_2GHZ] = 905 priv->band_table[NL80211_BAND_2GHZ]; 906 if (!(synth & PDR_SYNTH_5_GHZ_DISABLED)) 907 dev->wiphy->bands[NL80211_BAND_5GHZ] = 908 priv->band_table[NL80211_BAND_5GHZ]; 909 if ((synth & PDR_SYNTH_RX_DIV_MASK) == PDR_SYNTH_RX_DIV_SUPPORTED) 910 priv->rx_diversity_mask = 3; 911 if ((synth & PDR_SYNTH_TX_DIV_MASK) == PDR_SYNTH_TX_DIV_SUPPORTED) 912 priv->tx_diversity_mask = 3; 913 914 if (!is_valid_ether_addr(dev->wiphy->perm_addr)) { 915 u8 perm_addr[ETH_ALEN]; 916 917 wiphy_warn(dev->wiphy, 918 "Invalid hwaddr! Using randomly generated MAC addr\n"); 919 eth_random_addr(perm_addr); 920 SET_IEEE80211_PERM_ADDR(dev, perm_addr); 921 } 922 923 priv->cur_rssi = &p54_rssi_default; 924 925 wiphy_info(dev->wiphy, "hwaddr %pM, MAC:isl38%02x RF:%s\n", 926 dev->wiphy->perm_addr, priv->version, 927 p54_rf_chips[priv->rxhw]); 928 929 return 0; 930 931 err: 932 kfree(priv->iq_autocal); 933 kfree(priv->output_limit); 934 kfree(priv->curve_data); 935 kfree(priv->rssi_db); 936 kfree(priv->survey); 937 priv->iq_autocal = NULL; 938 priv->output_limit = NULL; 939 priv->curve_data = NULL; 940 priv->rssi_db = NULL; 941 priv->survey = NULL; 942 943 wiphy_err(dev->wiphy, "eeprom parse failed!\n"); 944 return err; 945 } 946 EXPORT_SYMBOL_GPL(p54_parse_eeprom); 947 948 int p54_read_eeprom(struct ieee80211_hw *dev) 949 { 950 struct p54_common *priv = dev->priv; 951 size_t eeprom_size = 0x2020, offset = 0, blocksize, maxblocksize; 952 int ret = -ENOMEM; 953 void *eeprom; 954 955 maxblocksize = EEPROM_READBACK_LEN; 956 if (priv->fw_var >= 0x509) 957 maxblocksize -= 0xc; 958 else 959 maxblocksize -= 0x4; 960 961 eeprom = kzalloc(eeprom_size, GFP_KERNEL); 962 if (unlikely(!eeprom)) 963 goto free; 964 965 while (eeprom_size) { 966 blocksize = min(eeprom_size, maxblocksize); 967 ret = p54_download_eeprom(priv, eeprom + offset, 968 offset, blocksize); 969 if (unlikely(ret)) 970 goto free; 971 972 offset += blocksize; 973 eeprom_size -= blocksize; 974 } 975 976 ret = p54_parse_eeprom(dev, eeprom, offset); 977 free: 978 kfree(eeprom); 979 return ret; 980 } 981 EXPORT_SYMBOL_GPL(p54_read_eeprom); 982