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/init.h>
20 #include <linux/firmware.h>
21 #include <linux/etherdevice.h>
22 #include <linux/sort.h>
23 #include <linux/slab.h>
24
25 #include <net/mac80211.h>
26 #include <linux/crc-ccitt.h>
27 #include <linux/export.h>
28
29 #include "p54.h"
30 #include "eeprom.h"
31 #include "lmac.h"
32
33 static struct ieee80211_rate p54_bgrates[] = {
34 { .bitrate = 10, .hw_value = 0, },
35 { .bitrate = 20, .hw_value = 1, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
36 { .bitrate = 55, .hw_value = 2, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
37 { .bitrate = 110, .hw_value = 3, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
38 { .bitrate = 60, .hw_value = 4, },
39 { .bitrate = 90, .hw_value = 5, },
40 { .bitrate = 120, .hw_value = 6, },
41 { .bitrate = 180, .hw_value = 7, },
42 { .bitrate = 240, .hw_value = 8, },
43 { .bitrate = 360, .hw_value = 9, },
44 { .bitrate = 480, .hw_value = 10, },
45 { .bitrate = 540, .hw_value = 11, },
46 };
47
48 static struct ieee80211_rate p54_arates[] = {
49 { .bitrate = 60, .hw_value = 4, },
50 { .bitrate = 90, .hw_value = 5, },
51 { .bitrate = 120, .hw_value = 6, },
52 { .bitrate = 180, .hw_value = 7, },
53 { .bitrate = 240, .hw_value = 8, },
54 { .bitrate = 360, .hw_value = 9, },
55 { .bitrate = 480, .hw_value = 10, },
56 { .bitrate = 540, .hw_value = 11, },
57 };
58
59 static struct p54_rssi_db_entry p54_rssi_default = {
60 /*
61 * The defaults are taken from usb-logs of the
62 * vendor driver. So, they should be safe to
63 * use in case we can't get a match from the
64 * rssi <-> dBm conversion database.
65 */
66 .mul = 130,
67 .add = -398,
68 };
69
70 #define CHAN_HAS_CAL BIT(0)
71 #define CHAN_HAS_LIMIT BIT(1)
72 #define CHAN_HAS_CURVE BIT(2)
73 #define CHAN_HAS_ALL (CHAN_HAS_CAL | CHAN_HAS_LIMIT | CHAN_HAS_CURVE)
74
75 struct p54_channel_entry {
76 u16 freq;
77 u16 data;
78 int index;
79 enum ieee80211_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[IEEE80211_NUM_BANDS];
87 };
88
p54_get_band_from_freq(u16 freq)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 IEEE80211_BAND_2GHZ;
95
96 if ((freq >= 4920) && (freq <= 5825))
97 return IEEE80211_BAND_5GHZ;
98
99 return -1;
100 }
101
same_band(u16 freq,u16 freq2)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
p54_compare_channels(const void * _a,const void * _b)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
p54_compare_rssichan(const void * _a,const void * _b)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
p54_fill_band_bitrates(struct ieee80211_hw * dev,struct ieee80211_supported_band * band_entry,enum ieee80211_band band)125 static int p54_fill_band_bitrates(struct ieee80211_hw *dev,
126 struct ieee80211_supported_band *band_entry,
127 enum ieee80211_band band)
128 {
129 /* TODO: generate rate array dynamically */
130
131 switch (band) {
132 case IEEE80211_BAND_2GHZ:
133 band_entry->bitrates = p54_bgrates;
134 band_entry->n_bitrates = ARRAY_SIZE(p54_bgrates);
135 break;
136 case IEEE80211_BAND_5GHZ:
137 band_entry->bitrates = p54_arates;
138 band_entry->n_bitrates = ARRAY_SIZE(p54_arates);
139 break;
140 default:
141 return -EINVAL;
142 }
143
144 return 0;
145 }
146
p54_generate_band(struct ieee80211_hw * dev,struct p54_channel_list * list,unsigned int * chan_num,enum ieee80211_band band)147 static int p54_generate_band(struct ieee80211_hw *dev,
148 struct p54_channel_list *list,
149 unsigned int *chan_num,
150 enum ieee80211_band band)
151 {
152 struct p54_common *priv = dev->priv;
153 struct ieee80211_supported_band *tmp, *old;
154 unsigned int i, j;
155 int ret = -ENOMEM;
156
157 if ((!list->entries) || (!list->band_channel_num[band]))
158 return -EINVAL;
159
160 tmp = kzalloc(sizeof(*tmp), GFP_KERNEL);
161 if (!tmp)
162 goto err_out;
163
164 tmp->channels = kzalloc(sizeof(struct ieee80211_channel) *
165 list->band_channel_num[band], GFP_KERNEL);
166 if (!tmp->channels)
167 goto err_out;
168
169 ret = p54_fill_band_bitrates(dev, tmp, band);
170 if (ret)
171 goto err_out;
172
173 for (i = 0, j = 0; (j < list->band_channel_num[band]) &&
174 (i < list->entries); i++) {
175 struct p54_channel_entry *chan = &list->channels[i];
176
177 if (chan->band != band)
178 continue;
179
180 if (chan->data != CHAN_HAS_ALL) {
181 wiphy_err(dev->wiphy, "%s%s%s is/are missing for "
182 "channel:%d [%d MHz].\n",
183 (chan->data & CHAN_HAS_CAL ? "" :
184 " [iqauto calibration data]"),
185 (chan->data & CHAN_HAS_LIMIT ? "" :
186 " [output power limits]"),
187 (chan->data & CHAN_HAS_CURVE ? "" :
188 " [curve data]"),
189 chan->index, chan->freq);
190 continue;
191 }
192
193 tmp->channels[j].band = chan->band;
194 tmp->channels[j].center_freq = chan->freq;
195 priv->survey[*chan_num].channel = &tmp->channels[j];
196 priv->survey[*chan_num].filled = SURVEY_INFO_NOISE_DBM |
197 SURVEY_INFO_CHANNEL_TIME |
198 SURVEY_INFO_CHANNEL_TIME_BUSY |
199 SURVEY_INFO_CHANNEL_TIME_TX;
200 tmp->channels[j].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 == IEEE80211_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
p54_update_channel_param(struct p54_channel_list * list,u16 freq,u16 data)232 static void p54_update_channel_param(struct p54_channel_list *list,
233 u16 freq, u16 data)
234 {
235 int band, i;
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 list->channels[i].data |= data;
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 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 return ;
259
260 i = list->entries++;
261 list->band_channel_num[band]++;
262
263 list->channels[i].freq = freq;
264 list->channels[i].data = data;
265 list->channels[i].band = band;
266 list->channels[i].index = ieee80211_frequency_to_channel(freq);
267 /* TODO: parse output_limit and fill max_power */
268 }
269 }
270
p54_generate_channel_lists(struct ieee80211_hw * dev)271 static int p54_generate_channel_lists(struct ieee80211_hw *dev)
272 {
273 struct p54_common *priv = dev->priv;
274 struct p54_channel_list *list;
275 unsigned int i, j, k, max_channel_num;
276 int ret = 0;
277 u16 freq;
278
279 if ((priv->iq_autocal_len != priv->curve_data->entries) ||
280 (priv->iq_autocal_len != priv->output_limit->entries))
281 wiphy_err(dev->wiphy,
282 "Unsupported or damaged EEPROM detected. "
283 "You may not be able to use all channels.\n");
284
285 max_channel_num = max_t(unsigned int, priv->output_limit->entries,
286 priv->iq_autocal_len);
287 max_channel_num = max_t(unsigned int, max_channel_num,
288 priv->curve_data->entries);
289
290 list = kzalloc(sizeof(*list), GFP_KERNEL);
291 if (!list) {
292 ret = -ENOMEM;
293 goto free;
294 }
295 priv->chan_num = max_channel_num;
296 priv->survey = kzalloc(sizeof(struct survey_info) * max_channel_num,
297 GFP_KERNEL);
298 if (!priv->survey) {
299 ret = -ENOMEM;
300 goto free;
301 }
302
303 list->max_entries = max_channel_num;
304 list->channels = kzalloc(sizeof(struct p54_channel_entry) *
305 max_channel_num, GFP_KERNEL);
306 if (!list->channels) {
307 ret = -ENOMEM;
308 goto free;
309 }
310
311 for (i = 0; i < max_channel_num; i++) {
312 if (i < priv->iq_autocal_len) {
313 freq = le16_to_cpu(priv->iq_autocal[i].freq);
314 p54_update_channel_param(list, freq, CHAN_HAS_CAL);
315 }
316
317 if (i < priv->output_limit->entries) {
318 freq = le16_to_cpup((__le16 *) (i *
319 priv->output_limit->entry_size +
320 priv->output_limit->offset +
321 priv->output_limit->data));
322
323 p54_update_channel_param(list, freq, CHAN_HAS_LIMIT);
324 }
325
326 if (i < priv->curve_data->entries) {
327 freq = le16_to_cpup((__le16 *) (i *
328 priv->curve_data->entry_size +
329 priv->curve_data->offset +
330 priv->curve_data->data));
331
332 p54_update_channel_param(list, freq, CHAN_HAS_CURVE);
333 }
334 }
335
336 /* sort the channel list by frequency */
337 sort(list->channels, list->entries, sizeof(struct p54_channel_entry),
338 p54_compare_channels, NULL);
339
340 k = 0;
341 for (i = 0, j = 0; i < IEEE80211_NUM_BANDS; i++) {
342 if (p54_generate_band(dev, list, &k, i) == 0)
343 j++;
344 }
345 if (j == 0) {
346 /* no useable band available. */
347 ret = -EINVAL;
348 }
349
350 free:
351 if (list) {
352 kfree(list->channels);
353 kfree(list);
354 }
355 if (ret) {
356 kfree(priv->survey);
357 priv->survey = NULL;
358 }
359
360 return ret;
361 }
362
p54_convert_rev0(struct ieee80211_hw * dev,struct pda_pa_curve_data * curve_data)363 static int p54_convert_rev0(struct ieee80211_hw *dev,
364 struct pda_pa_curve_data *curve_data)
365 {
366 struct p54_common *priv = dev->priv;
367 struct p54_pa_curve_data_sample *dst;
368 struct pda_pa_curve_data_sample_rev0 *src;
369 size_t cd_len = sizeof(*curve_data) +
370 (curve_data->points_per_channel*sizeof(*dst) + 2) *
371 curve_data->channels;
372 unsigned int i, j;
373 void *source, *target;
374
375 priv->curve_data = kmalloc(sizeof(*priv->curve_data) + cd_len,
376 GFP_KERNEL);
377 if (!priv->curve_data)
378 return -ENOMEM;
379
380 priv->curve_data->entries = curve_data->channels;
381 priv->curve_data->entry_size = sizeof(__le16) +
382 sizeof(*dst) * curve_data->points_per_channel;
383 priv->curve_data->offset = offsetof(struct pda_pa_curve_data, data);
384 priv->curve_data->len = cd_len;
385 memcpy(priv->curve_data->data, curve_data, sizeof(*curve_data));
386 source = curve_data->data;
387 target = ((struct pda_pa_curve_data *) priv->curve_data->data)->data;
388 for (i = 0; i < curve_data->channels; i++) {
389 __le16 *freq = source;
390 source += sizeof(__le16);
391 *((__le16 *)target) = *freq;
392 target += sizeof(__le16);
393 for (j = 0; j < curve_data->points_per_channel; j++) {
394 dst = target;
395 src = source;
396
397 dst->rf_power = src->rf_power;
398 dst->pa_detector = src->pa_detector;
399 dst->data_64qam = src->pcv;
400 /* "invent" the points for the other modulations */
401 #define SUB(x, y) (u8)(((x) - (y)) > (x) ? 0 : (x) - (y))
402 dst->data_16qam = SUB(src->pcv, 12);
403 dst->data_qpsk = SUB(dst->data_16qam, 12);
404 dst->data_bpsk = SUB(dst->data_qpsk, 12);
405 dst->data_barker = SUB(dst->data_bpsk, 14);
406 #undef SUB
407 target += sizeof(*dst);
408 source += sizeof(*src);
409 }
410 }
411
412 return 0;
413 }
414
p54_convert_rev1(struct ieee80211_hw * dev,struct pda_pa_curve_data * curve_data)415 static int p54_convert_rev1(struct ieee80211_hw *dev,
416 struct pda_pa_curve_data *curve_data)
417 {
418 struct p54_common *priv = dev->priv;
419 struct p54_pa_curve_data_sample *dst;
420 struct pda_pa_curve_data_sample_rev1 *src;
421 size_t cd_len = sizeof(*curve_data) +
422 (curve_data->points_per_channel*sizeof(*dst) + 2) *
423 curve_data->channels;
424 unsigned int i, j;
425 void *source, *target;
426
427 priv->curve_data = kzalloc(cd_len + sizeof(*priv->curve_data),
428 GFP_KERNEL);
429 if (!priv->curve_data)
430 return -ENOMEM;
431
432 priv->curve_data->entries = curve_data->channels;
433 priv->curve_data->entry_size = sizeof(__le16) +
434 sizeof(*dst) * curve_data->points_per_channel;
435 priv->curve_data->offset = offsetof(struct pda_pa_curve_data, data);
436 priv->curve_data->len = cd_len;
437 memcpy(priv->curve_data->data, curve_data, sizeof(*curve_data));
438 source = curve_data->data;
439 target = ((struct pda_pa_curve_data *) priv->curve_data->data)->data;
440 for (i = 0; i < curve_data->channels; i++) {
441 __le16 *freq = source;
442 source += sizeof(__le16);
443 *((__le16 *)target) = *freq;
444 target += sizeof(__le16);
445 for (j = 0; j < curve_data->points_per_channel; j++) {
446 memcpy(target, source, sizeof(*src));
447
448 target += sizeof(*dst);
449 source += sizeof(*src);
450 }
451 source++;
452 }
453
454 return 0;
455 }
456
457 static const char *p54_rf_chips[] = { "INVALID-0", "Duette3", "Duette2",
458 "Frisbee", "Xbow", "Longbow", "INVALID-6", "INVALID-7" };
459
p54_parse_rssical(struct ieee80211_hw * dev,u8 * data,int len,u16 type)460 static int p54_parse_rssical(struct ieee80211_hw *dev,
461 u8 *data, int len, u16 type)
462 {
463 struct p54_common *priv = dev->priv;
464 struct p54_rssi_db_entry *entry;
465 size_t db_len, entries;
466 int offset = 0, i;
467
468 if (type != PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED) {
469 entries = (type == PDR_RSSI_LINEAR_APPROXIMATION) ? 1 : 2;
470 if (len != sizeof(struct pda_rssi_cal_entry) * entries) {
471 wiphy_err(dev->wiphy, "rssical size mismatch.\n");
472 goto err_data;
473 }
474 } else {
475 /*
476 * Some devices (Dell 1450 USB, Xbow 5GHz card, etc...)
477 * have an empty two byte header.
478 */
479 if (*((__le16 *)&data[offset]) == cpu_to_le16(0))
480 offset += 2;
481
482 entries = (len - offset) /
483 sizeof(struct pda_rssi_cal_ext_entry);
484
485 if ((len - offset) % sizeof(struct pda_rssi_cal_ext_entry) ||
486 entries <= 0) {
487 wiphy_err(dev->wiphy, "invalid rssi database.\n");
488 goto err_data;
489 }
490 }
491
492 db_len = sizeof(*entry) * entries;
493 priv->rssi_db = kzalloc(db_len + sizeof(*priv->rssi_db), GFP_KERNEL);
494 if (!priv->rssi_db)
495 return -ENOMEM;
496
497 priv->rssi_db->offset = 0;
498 priv->rssi_db->entries = entries;
499 priv->rssi_db->entry_size = sizeof(*entry);
500 priv->rssi_db->len = db_len;
501
502 entry = (void *)((unsigned long)priv->rssi_db->data + priv->rssi_db->offset);
503 if (type == PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED) {
504 struct pda_rssi_cal_ext_entry *cal = (void *) &data[offset];
505
506 for (i = 0; i < entries; i++) {
507 entry[i].freq = le16_to_cpu(cal[i].freq);
508 entry[i].mul = (s16) le16_to_cpu(cal[i].mul);
509 entry[i].add = (s16) le16_to_cpu(cal[i].add);
510 }
511 } else {
512 struct pda_rssi_cal_entry *cal = (void *) &data[offset];
513
514 for (i = 0; i < entries; i++) {
515 u16 freq = 0;
516 switch (i) {
517 case IEEE80211_BAND_2GHZ:
518 freq = 2437;
519 break;
520 case IEEE80211_BAND_5GHZ:
521 freq = 5240;
522 break;
523 }
524
525 entry[i].freq = freq;
526 entry[i].mul = (s16) le16_to_cpu(cal[i].mul);
527 entry[i].add = (s16) le16_to_cpu(cal[i].add);
528 }
529 }
530
531 /* sort the list by channel frequency */
532 sort(entry, entries, sizeof(*entry), p54_compare_rssichan, NULL);
533 return 0;
534
535 err_data:
536 wiphy_err(dev->wiphy,
537 "rssi calibration data packing type:(%x) len:%d.\n",
538 type, len);
539
540 print_hex_dump_bytes("rssical:", DUMP_PREFIX_NONE, data, len);
541
542 wiphy_err(dev->wiphy, "please report this issue.\n");
543 return -EINVAL;
544 }
545
p54_rssi_find(struct p54_common * priv,const u16 freq)546 struct p54_rssi_db_entry *p54_rssi_find(struct p54_common *priv, const u16 freq)
547 {
548 struct p54_rssi_db_entry *entry;
549 int i, found = -1;
550
551 if (!priv->rssi_db)
552 return &p54_rssi_default;
553
554 entry = (void *)(priv->rssi_db->data + priv->rssi_db->offset);
555 for (i = 0; i < priv->rssi_db->entries; i++) {
556 if (!same_band(freq, entry[i].freq))
557 continue;
558
559 if (found == -1) {
560 found = i;
561 continue;
562 }
563
564 /* nearest match */
565 if (abs(freq - entry[i].freq) <
566 abs(freq - entry[found].freq)) {
567 found = i;
568 continue;
569 } else {
570 break;
571 }
572 }
573
574 return found < 0 ? &p54_rssi_default : &entry[found];
575 }
576
p54_parse_default_country(struct ieee80211_hw * dev,void * data,int len)577 static void p54_parse_default_country(struct ieee80211_hw *dev,
578 void *data, int len)
579 {
580 struct pda_country *country;
581
582 if (len != sizeof(*country)) {
583 wiphy_err(dev->wiphy,
584 "found possible invalid default country eeprom entry. (entry size: %d)\n",
585 len);
586
587 print_hex_dump_bytes("country:", DUMP_PREFIX_NONE,
588 data, len);
589
590 wiphy_err(dev->wiphy, "please report this issue.\n");
591 return;
592 }
593
594 country = (struct pda_country *) data;
595 if (country->flags == PDR_COUNTRY_CERT_CODE_PSEUDO)
596 regulatory_hint(dev->wiphy, country->alpha2);
597 else {
598 /* TODO:
599 * write a shared/common function that converts
600 * "Regulatory domain codes" (802.11-2007 14.8.2.2)
601 * into ISO/IEC 3166-1 alpha2 for regulatory_hint.
602 */
603 }
604 }
605
p54_convert_output_limits(struct ieee80211_hw * dev,u8 * data,size_t len)606 static int p54_convert_output_limits(struct ieee80211_hw *dev,
607 u8 *data, size_t len)
608 {
609 struct p54_common *priv = dev->priv;
610
611 if (len < 2)
612 return -EINVAL;
613
614 if (data[0] != 0) {
615 wiphy_err(dev->wiphy, "unknown output power db revision:%x\n",
616 data[0]);
617 return -EINVAL;
618 }
619
620 if (2 + data[1] * sizeof(struct pda_channel_output_limit) > len)
621 return -EINVAL;
622
623 priv->output_limit = kmalloc(data[1] *
624 sizeof(struct pda_channel_output_limit) +
625 sizeof(*priv->output_limit), GFP_KERNEL);
626
627 if (!priv->output_limit)
628 return -ENOMEM;
629
630 priv->output_limit->offset = 0;
631 priv->output_limit->entries = data[1];
632 priv->output_limit->entry_size =
633 sizeof(struct pda_channel_output_limit);
634 priv->output_limit->len = priv->output_limit->entry_size *
635 priv->output_limit->entries +
636 priv->output_limit->offset;
637
638 memcpy(priv->output_limit->data, &data[2],
639 data[1] * sizeof(struct pda_channel_output_limit));
640
641 return 0;
642 }
643
p54_convert_db(struct pda_custom_wrapper * src,size_t total_len)644 static struct p54_cal_database *p54_convert_db(struct pda_custom_wrapper *src,
645 size_t total_len)
646 {
647 struct p54_cal_database *dst;
648 size_t payload_len, entries, entry_size, offset;
649
650 payload_len = le16_to_cpu(src->len);
651 entries = le16_to_cpu(src->entries);
652 entry_size = le16_to_cpu(src->entry_size);
653 offset = le16_to_cpu(src->offset);
654 if (((entries * entry_size + offset) != payload_len) ||
655 (payload_len + sizeof(*src) != total_len))
656 return NULL;
657
658 dst = kmalloc(sizeof(*dst) + payload_len, GFP_KERNEL);
659 if (!dst)
660 return NULL;
661
662 dst->entries = entries;
663 dst->entry_size = entry_size;
664 dst->offset = offset;
665 dst->len = payload_len;
666
667 memcpy(dst->data, src->data, payload_len);
668 return dst;
669 }
670
p54_parse_eeprom(struct ieee80211_hw * dev,void * eeprom,int len)671 int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
672 {
673 struct p54_common *priv = dev->priv;
674 struct eeprom_pda_wrap *wrap;
675 struct pda_entry *entry;
676 unsigned int data_len, entry_len;
677 void *tmp;
678 int err;
679 u8 *end = (u8 *)eeprom + len;
680 u16 synth = 0;
681 u16 crc16 = ~0;
682
683 wrap = (struct eeprom_pda_wrap *) eeprom;
684 entry = (void *)wrap->data + le16_to_cpu(wrap->len);
685
686 /* verify that at least the entry length/code fits */
687 while ((u8 *)entry <= end - sizeof(*entry)) {
688 entry_len = le16_to_cpu(entry->len);
689 data_len = ((entry_len - 1) << 1);
690
691 /* abort if entry exceeds whole structure */
692 if ((u8 *)entry + sizeof(*entry) + data_len > end)
693 break;
694
695 switch (le16_to_cpu(entry->code)) {
696 case PDR_MAC_ADDRESS:
697 if (data_len != ETH_ALEN)
698 break;
699 SET_IEEE80211_PERM_ADDR(dev, entry->data);
700 break;
701 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS:
702 if (priv->output_limit)
703 break;
704 err = p54_convert_output_limits(dev, entry->data,
705 data_len);
706 if (err)
707 goto err;
708 break;
709 case PDR_PRISM_PA_CAL_CURVE_DATA: {
710 struct pda_pa_curve_data *curve_data =
711 (struct pda_pa_curve_data *)entry->data;
712 if (data_len < sizeof(*curve_data)) {
713 err = -EINVAL;
714 goto err;
715 }
716
717 switch (curve_data->cal_method_rev) {
718 case 0:
719 err = p54_convert_rev0(dev, curve_data);
720 break;
721 case 1:
722 err = p54_convert_rev1(dev, curve_data);
723 break;
724 default:
725 wiphy_err(dev->wiphy,
726 "unknown curve data revision %d\n",
727 curve_data->cal_method_rev);
728 err = -ENODEV;
729 break;
730 }
731 if (err)
732 goto err;
733 }
734 break;
735 case PDR_PRISM_ZIF_TX_IQ_CALIBRATION:
736 priv->iq_autocal = kmemdup(entry->data, data_len,
737 GFP_KERNEL);
738 if (!priv->iq_autocal) {
739 err = -ENOMEM;
740 goto err;
741 }
742
743 priv->iq_autocal_len = data_len / sizeof(struct pda_iq_autocal_entry);
744 break;
745 case PDR_DEFAULT_COUNTRY:
746 p54_parse_default_country(dev, entry->data, data_len);
747 break;
748 case PDR_INTERFACE_LIST:
749 tmp = entry->data;
750 while ((u8 *)tmp < entry->data + data_len) {
751 struct exp_if *exp_if = tmp;
752 if (exp_if->if_id == cpu_to_le16(IF_ID_ISL39000))
753 synth = le16_to_cpu(exp_if->variant);
754 tmp += sizeof(*exp_if);
755 }
756 break;
757 case PDR_HARDWARE_PLATFORM_COMPONENT_ID:
758 if (data_len < 2)
759 break;
760 priv->version = *(u8 *)(entry->data + 1);
761 break;
762 case PDR_RSSI_LINEAR_APPROXIMATION:
763 case PDR_RSSI_LINEAR_APPROXIMATION_DUAL_BAND:
764 case PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED:
765 err = p54_parse_rssical(dev, entry->data, data_len,
766 le16_to_cpu(entry->code));
767 if (err)
768 goto err;
769 break;
770 case PDR_RSSI_LINEAR_APPROXIMATION_CUSTOMV2: {
771 struct pda_custom_wrapper *pda = (void *) entry->data;
772 __le16 *src;
773 u16 *dst;
774 int i;
775
776 if (priv->rssi_db || data_len < sizeof(*pda))
777 break;
778
779 priv->rssi_db = p54_convert_db(pda, data_len);
780 if (!priv->rssi_db)
781 break;
782
783 src = (void *) priv->rssi_db->data;
784 dst = (void *) priv->rssi_db->data;
785
786 for (i = 0; i < priv->rssi_db->entries; i++)
787 *(dst++) = (s16) le16_to_cpu(*(src++));
788
789 }
790 break;
791 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS_CUSTOM: {
792 struct pda_custom_wrapper *pda = (void *) entry->data;
793 if (priv->output_limit || data_len < sizeof(*pda))
794 break;
795 priv->output_limit = p54_convert_db(pda, data_len);
796 }
797 break;
798 case PDR_PRISM_PA_CAL_CURVE_DATA_CUSTOM: {
799 struct pda_custom_wrapper *pda = (void *) entry->data;
800 if (priv->curve_data || data_len < sizeof(*pda))
801 break;
802 priv->curve_data = p54_convert_db(pda, data_len);
803 }
804 break;
805 case PDR_END:
806 crc16 = ~crc_ccitt(crc16, (u8 *) entry, sizeof(*entry));
807 if (crc16 != le16_to_cpup((__le16 *)entry->data)) {
808 wiphy_err(dev->wiphy, "eeprom failed checksum "
809 "test!\n");
810 err = -ENOMSG;
811 goto err;
812 } else {
813 goto good_eeprom;
814 }
815 break;
816 default:
817 break;
818 }
819
820 crc16 = crc_ccitt(crc16, (u8 *)entry, (entry_len + 1) * 2);
821 entry = (void *)entry + (entry_len + 1) * 2;
822 }
823
824 wiphy_err(dev->wiphy, "unexpected end of eeprom data.\n");
825 err = -ENODATA;
826 goto err;
827
828 good_eeprom:
829 if (!synth || !priv->iq_autocal || !priv->output_limit ||
830 !priv->curve_data) {
831 wiphy_err(dev->wiphy,
832 "not all required entries found in eeprom!\n");
833 err = -EINVAL;
834 goto err;
835 }
836
837 err = p54_generate_channel_lists(dev);
838 if (err)
839 goto err;
840
841 priv->rxhw = synth & PDR_SYNTH_FRONTEND_MASK;
842 if (priv->rxhw == PDR_SYNTH_FRONTEND_XBOW)
843 p54_init_xbow_synth(priv);
844 if (!(synth & PDR_SYNTH_24_GHZ_DISABLED))
845 dev->wiphy->bands[IEEE80211_BAND_2GHZ] =
846 priv->band_table[IEEE80211_BAND_2GHZ];
847 if (!(synth & PDR_SYNTH_5_GHZ_DISABLED))
848 dev->wiphy->bands[IEEE80211_BAND_5GHZ] =
849 priv->band_table[IEEE80211_BAND_5GHZ];
850 if ((synth & PDR_SYNTH_RX_DIV_MASK) == PDR_SYNTH_RX_DIV_SUPPORTED)
851 priv->rx_diversity_mask = 3;
852 if ((synth & PDR_SYNTH_TX_DIV_MASK) == PDR_SYNTH_TX_DIV_SUPPORTED)
853 priv->tx_diversity_mask = 3;
854
855 if (!is_valid_ether_addr(dev->wiphy->perm_addr)) {
856 u8 perm_addr[ETH_ALEN];
857
858 wiphy_warn(dev->wiphy,
859 "Invalid hwaddr! Using randomly generated MAC addr\n");
860 random_ether_addr(perm_addr);
861 SET_IEEE80211_PERM_ADDR(dev, perm_addr);
862 }
863
864 priv->cur_rssi = &p54_rssi_default;
865
866 wiphy_info(dev->wiphy, "hwaddr %pM, MAC:isl38%02x RF:%s\n",
867 dev->wiphy->perm_addr, priv->version,
868 p54_rf_chips[priv->rxhw]);
869
870 return 0;
871
872 err:
873 kfree(priv->iq_autocal);
874 kfree(priv->output_limit);
875 kfree(priv->curve_data);
876 kfree(priv->rssi_db);
877 kfree(priv->survey);
878 priv->iq_autocal = NULL;
879 priv->output_limit = NULL;
880 priv->curve_data = NULL;
881 priv->rssi_db = NULL;
882 priv->survey = NULL;
883
884 wiphy_err(dev->wiphy, "eeprom parse failed!\n");
885 return err;
886 }
887 EXPORT_SYMBOL_GPL(p54_parse_eeprom);
888
p54_read_eeprom(struct ieee80211_hw * dev)889 int p54_read_eeprom(struct ieee80211_hw *dev)
890 {
891 struct p54_common *priv = dev->priv;
892 size_t eeprom_size = 0x2020, offset = 0, blocksize, maxblocksize;
893 int ret = -ENOMEM;
894 void *eeprom;
895
896 maxblocksize = EEPROM_READBACK_LEN;
897 if (priv->fw_var >= 0x509)
898 maxblocksize -= 0xc;
899 else
900 maxblocksize -= 0x4;
901
902 eeprom = kzalloc(eeprom_size, GFP_KERNEL);
903 if (unlikely(!eeprom))
904 goto free;
905
906 while (eeprom_size) {
907 blocksize = min(eeprom_size, maxblocksize);
908 ret = p54_download_eeprom(priv, (void *) (eeprom + offset),
909 offset, blocksize);
910 if (unlikely(ret))
911 goto free;
912
913 offset += blocksize;
914 eeprom_size -= blocksize;
915 }
916
917 ret = p54_parse_eeprom(dev, eeprom, offset);
918 free:
919 kfree(eeprom);
920 return ret;
921 }
922 EXPORT_SYMBOL_GPL(p54_read_eeprom);
923