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 = 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 == NL80211_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; 224 225 err_out: 226 if (tmp) { 227 kfree(tmp->channels); 228 kfree(tmp); 229 } 230 231 return ret; 232 } 233 234 static 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 } 278 279 static 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 } 321 322 static 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 < NUM_NL80211_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 } 407 408 free: 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 } 420 421 static 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 } 472 473 static 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 } 514 515 static const char *p54_rf_chips[] = { "INVALID-0", "Duette3", "Duette2", 516 "Frisbee", "Xbow", "Longbow", "INVALID-6", "INVALID-7" }; 517 518 static 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 NL80211_BAND_2GHZ: 577 freq = 2437; 578 break; 579 case NL80211_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; 593 594 err_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 } 604 605 struct 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 } 635 636 static 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 } 664 665 static 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 } 702 703 static 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 } 729 730 int 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; 886 887 good_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[NL80211_BAND_2GHZ] = 906 priv->band_table[NL80211_BAND_2GHZ]; 907 if (!(synth & PDR_SYNTH_5_GHZ_DISABLED)) 908 dev->wiphy->bands[NL80211_BAND_5GHZ] = 909 priv->band_table[NL80211_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; 931 932 err: 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 } 947 EXPORT_SYMBOL_GPL(p54_parse_eeprom); 948 949 int 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); 978 free: 979 kfree(eeprom); 980 return ret; 981 } 982 EXPORT_SYMBOL_GPL(p54_read_eeprom); 983