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mac80211: fix unnecessary beacon update after peering status change
[linux-block.git] / drivers / net / wireless / p54 / eeprom.c
CommitLineData
4c8a32f5
CL		 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>
1a9b6679 22#include <linux/sort.h>
5a0e3ad6 23#include <linux/slab.h>
4c8a32f5
CL		 24
25#include <net/mac80211.h>
d7eb50c0 26#include <linux/crc-ccitt.h>
ee40fa06 27#include <linux/export.h>
4c8a32f5
CL		 28
29#include "p54.h"
30#include "eeprom.h"
31#include "lmac.h"
32
33static 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
4c8a32f5
CL		 48static 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
7a047f4f
CL		 59static 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
1a9b6679
CL		 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
75struct p54_channel_entry {
76 u16 freq;
77 u16 data;
78 int index;
9bc63816 79 int max_power;
1a9b6679 80 enum ieee80211_band band;
4c8a32f5
CL		 81};
82
1a9b6679
CL		 83struct p54_channel_list {
84 struct p54_channel_entry *channels;
85 size_t entries;
86 size_t max_entries;
87 size_t band_channel_num[IEEE80211_NUM_BANDS];
4c8a32f5
CL		 88};
89
1a9b6679
CL		 90static int p54_get_band_from_freq(u16 freq)
91{
92 /* FIXME: sync these values with the 802.11 spec */
93
94 if ((freq >= 2412) && (freq <= 2484))
95 return IEEE80211_BAND_2GHZ;
96
97 if ((freq >= 4920) && (freq <= 5825))
98 return IEEE80211_BAND_5GHZ;
99
100 return -1;
101}
102
7a047f4f
CL		 103static int same_band(u16 freq, u16 freq2)
104{
105 return p54_get_band_from_freq(freq) == p54_get_band_from_freq(freq2);
106}
107
1a9b6679
CL		 108static int p54_compare_channels(const void *_a,
109 const void *_b)
110{
111 const struct p54_channel_entry *a = _a;
112 const struct p54_channel_entry *b = _b;
113
192abece 114 return a->freq - b->freq;
1a9b6679
CL		 115}
116
7a047f4f
CL		 117static int p54_compare_rssichan(const void *_a,
118 const void *_b)
119{
120 const struct p54_rssi_db_entry *a = _a;
121 const struct p54_rssi_db_entry *b = _b;
122
123 return a->freq - b->freq;
124}
125
1a9b6679
CL		 126static int p54_fill_band_bitrates(struct ieee80211_hw *dev,
127 struct ieee80211_supported_band *band_entry,
128 enum ieee80211_band band)
129{
130 /* TODO: generate rate array dynamically */
131
132 switch (band) {
133 case IEEE80211_BAND_2GHZ:
134 band_entry->bitrates = p54_bgrates;
135 band_entry->n_bitrates = ARRAY_SIZE(p54_bgrates);
136 break;
137 case IEEE80211_BAND_5GHZ:
138 band_entry->bitrates = p54_arates;
139 band_entry->n_bitrates = ARRAY_SIZE(p54_arates);
140 break;
141 default:
142 return -EINVAL;
143 }
144
145 return 0;
146}
147
148static int p54_generate_band(struct ieee80211_hw *dev,
149 struct p54_channel_list *list,
0d78156e 150 unsigned int *chan_num,
1a9b6679
CL		 151 enum ieee80211_band band)
152{
153 struct p54_common *priv = dev->priv;
154 struct ieee80211_supported_band *tmp, *old;
155 unsigned int i, j;
156 int ret = -ENOMEM;
157
158 if ((!list->entries) || (!list->band_channel_num[band]))
93a59d75 159 return -EINVAL;
1a9b6679
CL		 160
161 tmp = kzalloc(sizeof(*tmp), GFP_KERNEL);
162 if (!tmp)
163 goto err_out;
164
165 tmp->channels = kzalloc(sizeof(struct ieee80211_channel) *
166 list->band_channel_num[band], GFP_KERNEL);
167 if (!tmp->channels)
168 goto err_out;
169
170 ret = p54_fill_band_bitrates(dev, tmp, band);
171 if (ret)
172 goto err_out;
173
174 for (i = 0, j = 0; (j < list->band_channel_num[band]) &&
175 (i < list->entries); i++) {
a3162eed 176 struct p54_channel_entry *chan = &list->channels[i];
9bc63816 177 struct ieee80211_channel *dest = &tmp->channels[j];
1a9b6679 178
a3162eed 179 if (chan->band != band)
1a9b6679
CL		 180 continue;
181
a3162eed
CL		 182 if (chan->data != CHAN_HAS_ALL) {
183 wiphy_err(dev->wiphy, "%s%s%s is/are missing for "
184 "channel:%d [%d MHz].\n",
185 (chan->data & CHAN_HAS_CAL ? "" :
c96c31e4 186 " [iqauto calibration data]"),
a3162eed 187 (chan->data & CHAN_HAS_LIMIT ? "" :
c96c31e4 188 " [output power limits]"),
a3162eed 189 (chan->data & CHAN_HAS_CURVE ? "" :
c96c31e4 190 " [curve data]"),
a3162eed 191 chan->index, chan->freq);
93a59d75 192 continue;
1a9b6679
CL		 193 }
194
9bc63816
CL		 195 dest->band = chan->band;
196 dest->center_freq = chan->freq;
197 dest->max_power = chan->max_power;
0d78156e
CL		 198 priv->survey[*chan_num].channel = &tmp->channels[j];
199 priv->survey[*chan_num].filled = SURVEY_INFO_NOISE_DBM |
200 SURVEY_INFO_CHANNEL_TIME |
201 SURVEY_INFO_CHANNEL_TIME_BUSY |
202 SURVEY_INFO_CHANNEL_TIME_TX;
9bc63816 203 dest->hw_value = (*chan_num);
1a9b6679 204 j++;
0d78156e 205 (*chan_num)++;
1a9b6679
CL		 206 }
207
93a59d75 208 if (j == 0) {
5db55844 209 wiphy_err(dev->wiphy, "Disabling totally damaged %d GHz band\n",
c96c31e4 210 (band == IEEE80211_BAND_2GHZ) ? 2 : 5);
93a59d75
CL		 211
212 ret = -ENODATA;
213 goto err_out;
214 }
215
216 tmp->n_channels = j;
1a9b6679
CL		 217 old = priv->band_table[band];
218 priv->band_table[band] = tmp;
219 if (old) {
220 kfree(old->channels);
221 kfree(old);
222 }
223
224 return 0;
225
226err_out:
227 if (tmp) {
228 kfree(tmp->channels);
229 kfree(tmp);
230 }
231
232 return ret;
233}
234
9bc63816
CL		 235static struct p54_channel_entry *p54_update_channel_param(struct p54_channel_list *list,
236 u16 freq, u16 data)
1a9b6679 237{
9bc63816
CL		 238 int i;
239 struct p54_channel_entry *entry = NULL;
1a9b6679
CL		 240
241 /*
242 * usually all lists in the eeprom are mostly sorted.
243 * so it's very likely that the entry we are looking for
244 * is right at the end of the list
245 */
246 for (i = list->entries; i >= 0; i--) {
247 if (freq == list->channels[i].freq) {
9bc63816 248 entry = &list->channels[i];
1a9b6679
CL		 249 break;
250 }
251 }
252
253 if ((i < 0) && (list->entries < list->max_entries)) {
254 /* entry does not exist yet. Initialize a new one. */
9bc63816 255 int band = p54_get_band_from_freq(freq);
1a9b6679
CL		 256
257 /*
258 * filter out frequencies which don't belong into
259 * any supported band.
260 */
9bc63816
CL		 261 if (band >= 0) {
262 i = list->entries++;
263 list->band_channel_num[band]++;
264
265 entry = &list->channels[i];
266 entry->freq = freq;
267 entry->band = band;
268 entry->index = ieee80211_frequency_to_channel(freq);
269 entry->max_power = 0;
270 entry->data = 0;
271 }
272 }
1a9b6679 273
9bc63816
CL		 274 if (entry)
275 entry->data |= data;
1a9b6679 276
9bc63816
CL		 277 return entry;
278}
279
280static int p54_get_maxpower(struct p54_common *priv, void *data)
281{
282 switch (priv->rxhw & PDR_SYNTH_FRONTEND_MASK) {
283 case PDR_SYNTH_FRONTEND_LONGBOW: {
284 struct pda_channel_output_limit_longbow *pda = data;
285 int j;
286 u16 rawpower = 0;
287 pda = data;
288 for (j = 0; j < ARRAY_SIZE(pda->point); j++) {
289 struct pda_channel_output_limit_point_longbow *point =
290 &pda->point[j];
291 rawpower = max(rawpower, le16_to_cpu(point->val_qpsk));
292 rawpower = max(rawpower, le16_to_cpu(point->val_bpsk));
293 rawpower = max(rawpower, le16_to_cpu(point->val_16qam));
294 rawpower = max(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;
1a9b6679
CL		 316 }
317}
318
319static int p54_generate_channel_lists(struct ieee80211_hw *dev)
320{
321 struct p54_common *priv = dev->priv;
322 struct p54_channel_list *list;
0d78156e 323 unsigned int i, j, k, max_channel_num;
93a59d75 324 int ret = 0;
1a9b6679
CL		 325 u16 freq;
326
327 if ((priv->iq_autocal_len != priv->curve_data->entries) ||
328 (priv->iq_autocal_len != priv->output_limit->entries))
c96c31e4
JP		 329 wiphy_err(dev->wiphy,
330 "Unsupported or damaged EEPROM detected. "
331 "You may not be able to use all channels.\n");
1a9b6679
CL		 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(sizeof(*list), GFP_KERNEL);
93a59d75
CL		 339 if (!list) {
340 ret = -ENOMEM;
1a9b6679 341 goto free;
93a59d75 342 }
0d78156e
CL		 343 priv->chan_num = max_channel_num;
344 priv->survey = kzalloc(sizeof(struct survey_info) * max_channel_num,
345 GFP_KERNEL);
346 if (!priv->survey) {
347 ret = -ENOMEM;
348 goto free;
349 }
1a9b6679
CL		 350
351 list->max_entries = max_channel_num;
352 list->channels = kzalloc(sizeof(struct p54_channel_entry) *
353 max_channel_num, GFP_KERNEL);
0d91f22b
JL		 354 if (!list->channels) {
355 ret = -ENOMEM;
1a9b6679 356 goto free;
0d91f22b 357 }
1a9b6679
CL		 358
359 for (i = 0; i < max_channel_num; i++) {
360 if (i < priv->iq_autocal_len) {
361 freq = le16_to_cpu(priv->iq_autocal[i].freq);
362 p54_update_channel_param(list, freq, CHAN_HAS_CAL);
363 }
364
365 if (i < priv->output_limit->entries) {
9bc63816
CL		 366 struct p54_channel_entry *tmp;
367
368 void *data = (void *) ((unsigned long) i *
369 priv->output_limit->entry_size +
370 priv->output_limit->offset +
371 priv->output_limit->data);
372
373 freq = le16_to_cpup((__le16 *) data);
374 tmp = p54_update_channel_param(list, freq,
375 CHAN_HAS_LIMIT);
376 if (tmp) {
377 tmp->max_power = p54_get_maxpower(priv, data);
378 }
1a9b6679
CL		 379 }
380
381 if (i < priv->curve_data->entries) {
382 freq = le16_to_cpup((__le16 *) (i *
383 priv->curve_data->entry_size +
384 priv->curve_data->offset +
385 priv->curve_data->data));
386
387 p54_update_channel_param(list, freq, CHAN_HAS_CURVE);
388 }
389 }
390
192abece 391 /* sort the channel list by frequency */
1a9b6679
CL		 392 sort(list->channels, list->entries, sizeof(struct p54_channel_entry),
393 p54_compare_channels, NULL);
394
0d78156e 395 k = 0;
1a9b6679 396 for (i = 0, j = 0; i < IEEE80211_NUM_BANDS; i++) {
0d78156e 397 if (p54_generate_band(dev, list, &k, i) == 0)
1a9b6679 398 j++;
1a9b6679
CL		 399 }
400 if (j == 0) {
401 /* no useable band available. */
402 ret = -EINVAL;
403 }
404
405free:
406 if (list) {
407 kfree(list->channels);
408 kfree(list);
409 }
0d78156e
CL		 410 if (ret) {
411 kfree(priv->survey);
412 priv->survey = NULL;
413 }
1a9b6679
CL		 414
415 return ret;
416}
417
4c8a32f5
CL		 418static int p54_convert_rev0(struct ieee80211_hw *dev,
419 struct pda_pa_curve_data *curve_data)
420{
421 struct p54_common *priv = dev->priv;
422 struct p54_pa_curve_data_sample *dst;
423 struct pda_pa_curve_data_sample_rev0 *src;
424 size_t cd_len = sizeof(*curve_data) +
425 (curve_data->points_per_channel*sizeof(*dst) + 2) *
426 curve_data->channels;
427 unsigned int i, j;
428 void *source, *target;
429
430 priv->curve_data = kmalloc(sizeof(*priv->curve_data) + cd_len,
431 GFP_KERNEL);
432 if (!priv->curve_data)
433 return -ENOMEM;
434
435 priv->curve_data->entries = curve_data->channels;
436 priv->curve_data->entry_size = sizeof(__le16) +
437 sizeof(*dst) * curve_data->points_per_channel;
438 priv->curve_data->offset = offsetof(struct pda_pa_curve_data, data);
439 priv->curve_data->len = cd_len;
440 memcpy(priv->curve_data->data, curve_data, sizeof(*curve_data));
441 source = curve_data->data;
442 target = ((struct pda_pa_curve_data *) priv->curve_data->data)->data;
443 for (i = 0; i < curve_data->channels; i++) {
444 __le16 *freq = source;
445 source += sizeof(__le16);
446 *((__le16 *)target) = *freq;
447 target += sizeof(__le16);
448 for (j = 0; j < curve_data->points_per_channel; j++) {
449 dst = target;
450 src = source;
451
452 dst->rf_power = src->rf_power;
453 dst->pa_detector = src->pa_detector;
454 dst->data_64qam = src->pcv;
455 /* "invent" the points for the other modulations */
456#define SUB(x, y) (u8)(((x) - (y)) > (x) ? 0 : (x) - (y))
457 dst->data_16qam = SUB(src->pcv, 12);
458 dst->data_qpsk = SUB(dst->data_16qam, 12);
459 dst->data_bpsk = SUB(dst->data_qpsk, 12);
460 dst->data_barker = SUB(dst->data_bpsk, 14);
461#undef SUB
462 target += sizeof(*dst);
463 source += sizeof(*src);
464 }
465 }
466
467 return 0;
468}
469
470static int p54_convert_rev1(struct ieee80211_hw *dev,
471 struct pda_pa_curve_data *curve_data)
472{
473 struct p54_common *priv = dev->priv;
474 struct p54_pa_curve_data_sample *dst;
475 struct pda_pa_curve_data_sample_rev1 *src;
476 size_t cd_len = sizeof(*curve_data) +
477 (curve_data->points_per_channel*sizeof(*dst) + 2) *
478 curve_data->channels;
479 unsigned int i, j;
480 void *source, *target;
481
482 priv->curve_data = kzalloc(cd_len + sizeof(*priv->curve_data),
483 GFP_KERNEL);
484 if (!priv->curve_data)
485 return -ENOMEM;
486
487 priv->curve_data->entries = curve_data->channels;
488 priv->curve_data->entry_size = sizeof(__le16) +
489 sizeof(*dst) * curve_data->points_per_channel;
490 priv->curve_data->offset = offsetof(struct pda_pa_curve_data, data);
491 priv->curve_data->len = cd_len;
492 memcpy(priv->curve_data->data, curve_data, sizeof(*curve_data));
493 source = curve_data->data;
494 target = ((struct pda_pa_curve_data *) priv->curve_data->data)->data;
495 for (i = 0; i < curve_data->channels; i++) {
496 __le16 *freq = source;
497 source += sizeof(__le16);
498 *((__le16 *)target) = *freq;
499 target += sizeof(__le16);
500 for (j = 0; j < curve_data->points_per_channel; j++) {
501 memcpy(target, source, sizeof(*src));
502
503 target += sizeof(*dst);
504 source += sizeof(*src);
505 }
506 source++;
507 }
508
509 return 0;
510}
511
512static const char *p54_rf_chips[] = { "INVALID-0", "Duette3", "Duette2",
513 "Frisbee", "Xbow", "Longbow", "INVALID-6", "INVALID-7" };
514
7a047f4f
CL		 515static int p54_parse_rssical(struct ieee80211_hw *dev,
516 u8 *data, int len, u16 type)
4c8a32f5
CL		 517{
518 struct p54_common *priv = dev->priv;
7a047f4f
CL		 519 struct p54_rssi_db_entry *entry;
520 size_t db_len, entries;
521 int offset = 0, i;
522
523 if (type != PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED) {
524 entries = (type == PDR_RSSI_LINEAR_APPROXIMATION) ? 1 : 2;
525 if (len != sizeof(struct pda_rssi_cal_entry) * entries) {
526 wiphy_err(dev->wiphy, "rssical size mismatch.\n");
527 goto err_data;
528 }
529 } else {
530 /*
531 * Some devices (Dell 1450 USB, Xbow 5GHz card, etc...)
532 * have an empty two byte header.
533 */
534 if (*((__le16 *)&data[offset]) == cpu_to_le16(0))
535 offset += 2;
4c8a32f5 536
7a047f4f
CL		 537 entries = (len - offset) /
538 sizeof(struct pda_rssi_cal_ext_entry);
4c8a32f5 539
7a047f4f
CL		 540 if ((len - offset) % sizeof(struct pda_rssi_cal_ext_entry) ||
541 entries <= 0) {
542 wiphy_err(dev->wiphy, "invalid rssi database.\n");
543 goto err_data;
544 }
545 }
4c8a32f5 546
7a047f4f
CL		 547 db_len = sizeof(*entry) * entries;
548 priv->rssi_db = kzalloc(db_len + sizeof(*priv->rssi_db), GFP_KERNEL);
549 if (!priv->rssi_db)
550 return -ENOMEM;
551
552 priv->rssi_db->offset = 0;
553 priv->rssi_db->entries = entries;
554 priv->rssi_db->entry_size = sizeof(*entry);
555 priv->rssi_db->len = db_len;
556
557 entry = (void *)((unsigned long)priv->rssi_db->data + priv->rssi_db->offset);
558 if (type == PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED) {
559 struct pda_rssi_cal_ext_entry *cal = (void *) &data[offset];
560
561 for (i = 0; i < entries; i++) {
562 entry[i].freq = le16_to_cpu(cal[i].freq);
563 entry[i].mul = (s16) le16_to_cpu(cal[i].mul);
564 entry[i].add = (s16) le16_to_cpu(cal[i].add);
565 }
566 } else {
567 struct pda_rssi_cal_entry *cal = (void *) &data[offset];
568
569 for (i = 0; i < entries; i++) {
ce6cac88 570 u16 freq = 0;
7a047f4f
CL		 571 switch (i) {
572 case IEEE80211_BAND_2GHZ:
573 freq = 2437;
574 break;
575 case IEEE80211_BAND_5GHZ:
576 freq = 5240;
577 break;
578 }
579
580 entry[i].freq = freq;
581 entry[i].mul = (s16) le16_to_cpu(cal[i].mul);
582 entry[i].add = (s16) le16_to_cpu(cal[i].add);
583 }
4c8a32f5
CL		 584 }
585
7a047f4f
CL		 586 /* sort the list by channel frequency */
587 sort(entry, entries, sizeof(*entry), p54_compare_rssichan, NULL);
588 return 0;
589
590err_data:
591 wiphy_err(dev->wiphy,
592 "rssi calibration data packing type:(%x) len:%d.\n",
593 type, len);
594
595 print_hex_dump_bytes("rssical:", DUMP_PREFIX_NONE, data, len);
596
597 wiphy_err(dev->wiphy, "please report this issue.\n");
598 return -EINVAL;
599}
600
601struct p54_rssi_db_entry *p54_rssi_find(struct p54_common *priv, const u16 freq)
602{
a5a7103f 603 struct p54_rssi_db_entry *entry;
7a047f4f
CL		 604 int i, found = -1;
605
a5a7103f
FF		 606 if (!priv->rssi_db)
607 return &p54_rssi_default;
608
609 entry = (void *)(priv->rssi_db->data + priv->rssi_db->offset);
7a047f4f
CL		 610 for (i = 0; i < priv->rssi_db->entries; i++) {
611 if (!same_band(freq, entry[i].freq))
612 continue;
613
614 if (found == -1) {
615 found = i;
616 continue;
617 }
618
619 /* nearest match */
620 if (abs(freq - entry[i].freq) <
621 abs(freq - entry[found].freq)) {
622 found = i;
623 continue;
624 } else {
625 break;
626 }
4c8a32f5 627 }
7a047f4f
CL		 628
629 return found < 0 ? &p54_rssi_default : &entry[found];
4c8a32f5
CL		 630}
631
632static void p54_parse_default_country(struct ieee80211_hw *dev,
633 void *data, int len)
634{
635 struct pda_country *country;
636
637 if (len != sizeof(*country)) {
c96c31e4
JP		 638 wiphy_err(dev->wiphy,
639 "found possible invalid default country eeprom entry. (entry size: %d)\n",
640 len);
4c8a32f5
CL		 641
642 print_hex_dump_bytes("country:", DUMP_PREFIX_NONE,
643 data, len);
644
c96c31e4 645 wiphy_err(dev->wiphy, "please report this issue.\n");
4c8a32f5
CL		 646 return;
647 }
648
649 country = (struct pda_country *) data;
650 if (country->flags == PDR_COUNTRY_CERT_CODE_PSEUDO)
651 regulatory_hint(dev->wiphy, country->alpha2);
652 else {
653 /* TODO:
654 * write a shared/common function that converts
655 * "Regulatory domain codes" (802.11-2007 14.8.2.2)
656 * into ISO/IEC 3166-1 alpha2 for regulatory_hint.
657 */
658 }
659}
660
661static int p54_convert_output_limits(struct ieee80211_hw *dev,
662 u8 *data, size_t len)
663{
664 struct p54_common *priv = dev->priv;
665
666 if (len < 2)
667 return -EINVAL;
668
669 if (data[0] != 0) {
c96c31e4
JP		 670 wiphy_err(dev->wiphy, "unknown output power db revision:%x\n",
671 data[0]);
4c8a32f5
CL		 672 return -EINVAL;
673 }
674
675 if (2 + data[1] * sizeof(struct pda_channel_output_limit) > len)
676 return -EINVAL;
677
678 priv->output_limit = kmalloc(data[1] *
679 sizeof(struct pda_channel_output_limit) +
680 sizeof(*priv->output_limit), GFP_KERNEL);
681
682 if (!priv->output_limit)
683 return -ENOMEM;
684
685 priv->output_limit->offset = 0;
686 priv->output_limit->entries = data[1];
687 priv->output_limit->entry_size =
688 sizeof(struct pda_channel_output_limit);
689 priv->output_limit->len = priv->output_limit->entry_size *
690 priv->output_limit->entries +
691 priv->output_limit->offset;
692
693 memcpy(priv->output_limit->data, &data[2],
694 data[1] * sizeof(struct pda_channel_output_limit));
695
696 return 0;
697}
698
699static struct p54_cal_database *p54_convert_db(struct pda_custom_wrapper *src,
700 size_t total_len)
701{
702 struct p54_cal_database *dst;
703 size_t payload_len, entries, entry_size, offset;
704
705 payload_len = le16_to_cpu(src->len);
706 entries = le16_to_cpu(src->entries);
707 entry_size = le16_to_cpu(src->entry_size);
708 offset = le16_to_cpu(src->offset);
709 if (((entries * entry_size + offset) != payload_len) ||
710 (payload_len + sizeof(*src) != total_len))
711 return NULL;
712
713 dst = kmalloc(sizeof(*dst) + payload_len, GFP_KERNEL);
714 if (!dst)
715 return NULL;
716
717 dst->entries = entries;
718 dst->entry_size = entry_size;
719 dst->offset = offset;
720 dst->len = payload_len;
721
722 memcpy(dst->data, src->data, payload_len);
723 return dst;
724}
725
726int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
727{
728 struct p54_common *priv = dev->priv;
e6a3f551 729 struct eeprom_pda_wrap *wrap;
4c8a32f5
CL		 730 struct pda_entry *entry;
731 unsigned int data_len, entry_len;
732 void *tmp;
733 int err;
734 u8 *end = (u8 *)eeprom + len;
735 u16 synth = 0;
d7eb50c0 736 u16 crc16 = ~0;
4c8a32f5
CL		 737
738 wrap = (struct eeprom_pda_wrap *) eeprom;
739 entry = (void *)wrap->data + le16_to_cpu(wrap->len);
740
741 /* verify that at least the entry length/code fits */
742 while ((u8 *)entry <= end - sizeof(*entry)) {
743 entry_len = le16_to_cpu(entry->len);
744 data_len = ((entry_len - 1) << 1);
745
746 /* abort if entry exceeds whole structure */
747 if ((u8 *)entry + sizeof(*entry) + data_len > end)
748 break;
749
750 switch (le16_to_cpu(entry->code)) {
751 case PDR_MAC_ADDRESS:
752 if (data_len != ETH_ALEN)
753 break;
754 SET_IEEE80211_PERM_ADDR(dev, entry->data);
755 break;
756 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS:
757 if (priv->output_limit)
758 break;
759 err = p54_convert_output_limits(dev, entry->data,
760 data_len);
761 if (err)
762 goto err;
763 break;
764 case PDR_PRISM_PA_CAL_CURVE_DATA: {
765 struct pda_pa_curve_data *curve_data =
766 (struct pda_pa_curve_data *)entry->data;
767 if (data_len < sizeof(*curve_data)) {
768 err = -EINVAL;
769 goto err;
770 }
771
772 switch (curve_data->cal_method_rev) {
773 case 0:
774 err = p54_convert_rev0(dev, curve_data);
775 break;
776 case 1:
777 err = p54_convert_rev1(dev, curve_data);
778 break;
779 default:
c96c31e4
JP		 780 wiphy_err(dev->wiphy,
781 "unknown curve data revision %d\n",
782 curve_data->cal_method_rev);
4c8a32f5
CL		 783 err = -ENODEV;
784 break;
785 }
786 if (err)
787 goto err;
788 }
789 break;
790 case PDR_PRISM_ZIF_TX_IQ_CALIBRATION:
27b81bbe
JL		 791 priv->iq_autocal = kmemdup(entry->data, data_len,
792 GFP_KERNEL);
4c8a32f5
CL		 793 if (!priv->iq_autocal) {
794 err = -ENOMEM;
795 goto err;
796 }
797
4c8a32f5
CL		 798 priv->iq_autocal_len = data_len / sizeof(struct pda_iq_autocal_entry);
799 break;
800 case PDR_DEFAULT_COUNTRY:
801 p54_parse_default_country(dev, entry->data, data_len);
802 break;
803 case PDR_INTERFACE_LIST:
804 tmp = entry->data;
805 while ((u8 *)tmp < entry->data + data_len) {
806 struct exp_if *exp_if = tmp;
807 if (exp_if->if_id == cpu_to_le16(IF_ID_ISL39000))
808 synth = le16_to_cpu(exp_if->variant);
809 tmp += sizeof(*exp_if);
810 }
811 break;
812 case PDR_HARDWARE_PLATFORM_COMPONENT_ID:
813 if (data_len < 2)
814 break;
815 priv->version = *(u8 *)(entry->data + 1);
816 break;
817 case PDR_RSSI_LINEAR_APPROXIMATION:
818 case PDR_RSSI_LINEAR_APPROXIMATION_DUAL_BAND:
819 case PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED:
7a047f4f
CL		 820 err = p54_parse_rssical(dev, entry->data, data_len,
821 le16_to_cpu(entry->code));
822 if (err)
823 goto err;
4c8a32f5 824 break;
7a047f4f
CL		 825 case PDR_RSSI_LINEAR_APPROXIMATION_CUSTOMV2: {
826 struct pda_custom_wrapper *pda = (void *) entry->data;
827 __le16 *src;
828 u16 *dst;
4c8a32f5
CL		 829 int i;
830
7a047f4f
CL		 831 if (priv->rssi_db || data_len < sizeof(*pda))
832 break;
833
834 priv->rssi_db = p54_convert_db(pda, data_len);
835 if (!priv->rssi_db)
836 break;
837
838 src = (void *) priv->rssi_db->data;
839 dst = (void *) priv->rssi_db->data;
840
841 for (i = 0; i < priv->rssi_db->entries; i++)
4c8a32f5 842 *(dst++) = (s16) le16_to_cpu(*(src++));
7a047f4f 843
4c8a32f5
CL		 844 }
845 break;
846 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS_CUSTOM: {
847 struct pda_custom_wrapper *pda = (void *) entry->data;
848 if (priv->output_limit || data_len < sizeof(*pda))
849 break;
850 priv->output_limit = p54_convert_db(pda, data_len);
851 }
852 break;
853 case PDR_PRISM_PA_CAL_CURVE_DATA_CUSTOM: {
854 struct pda_custom_wrapper *pda = (void *) entry->data;
855 if (priv->curve_data || data_len < sizeof(*pda))
856 break;
857 priv->curve_data = p54_convert_db(pda, data_len);
858 }
859 break;
860 case PDR_END:
d7eb50c0
CL		 861 crc16 = ~crc_ccitt(crc16, (u8 *) entry, sizeof(*entry));
862 if (crc16 != le16_to_cpup((__le16 *)entry->data)) {
863 wiphy_err(dev->wiphy, "eeprom failed checksum "
864 "test!\n");
865 err = -ENOMSG;
866 goto err;
867 } else {
868 goto good_eeprom;
869 }
4c8a32f5
CL		 870 break;
871 default:
872 break;
873 }
874
d7eb50c0
CL		 875 crc16 = crc_ccitt(crc16, (u8 *)entry, (entry_len + 1) * 2);
876 entry = (void *)entry + (entry_len + 1) * 2;
4c8a32f5
CL		 877 }
878
d7eb50c0
CL		 879 wiphy_err(dev->wiphy, "unexpected end of eeprom data.\n");
880 err = -ENODATA;
881 goto err;
882
883good_eeprom:
4c8a32f5
CL		 884 if (!synth || !priv->iq_autocal || !priv->output_limit ||
885 !priv->curve_data) {
c96c31e4
JP		 886 wiphy_err(dev->wiphy,
887 "not all required entries found in eeprom!\n");
4c8a32f5
CL		 888 err = -EINVAL;
889 goto err;
890 }
891
9bc63816
CL		 892 priv->rxhw = synth & PDR_SYNTH_FRONTEND_MASK;
893
1a9b6679
CL		 894 err = p54_generate_channel_lists(dev);
895 if (err)
896 goto err;
897
4c8a32f5
CL		 898 if (priv->rxhw == PDR_SYNTH_FRONTEND_XBOW)
899 p54_init_xbow_synth(priv);
900 if (!(synth & PDR_SYNTH_24_GHZ_DISABLED))
1a9b6679
CL		 901 dev->wiphy->bands[IEEE80211_BAND_2GHZ] =
902 priv->band_table[IEEE80211_BAND_2GHZ];
4c8a32f5 903 if (!(synth & PDR_SYNTH_5_GHZ_DISABLED))
1a9b6679
CL		 904 dev->wiphy->bands[IEEE80211_BAND_5GHZ] =
905 priv->band_table[IEEE80211_BAND_5GHZ];
4c8a32f5
CL		 906 if ((synth & PDR_SYNTH_RX_DIV_MASK) == PDR_SYNTH_RX_DIV_SUPPORTED)
907 priv->rx_diversity_mask = 3;
908 if ((synth & PDR_SYNTH_TX_DIV_MASK) == PDR_SYNTH_TX_DIV_SUPPORTED)
909 priv->tx_diversity_mask = 3;
910
911 if (!is_valid_ether_addr(dev->wiphy->perm_addr)) {
912 u8 perm_addr[ETH_ALEN];
913
c96c31e4 914 wiphy_warn(dev->wiphy,
5db55844 915 "Invalid hwaddr! Using randomly generated MAC addr\n");
f4f7f414 916 eth_random_addr(perm_addr);
4c8a32f5
CL		 917 SET_IEEE80211_PERM_ADDR(dev, perm_addr);
918 }
919
7a047f4f
CL		 920 priv->cur_rssi = &p54_rssi_default;
921
5db55844 922 wiphy_info(dev->wiphy, "hwaddr %pM, MAC:isl38%02x RF:%s\n",
c96c31e4
JP		 923 dev->wiphy->perm_addr, priv->version,
924 p54_rf_chips[priv->rxhw]);
4c8a32f5
CL		 925
926 return 0;
927
928err:
929 kfree(priv->iq_autocal);
930 kfree(priv->output_limit);
931 kfree(priv->curve_data);
7a047f4f 932 kfree(priv->rssi_db);
0d78156e 933 kfree(priv->survey);
4c8a32f5
CL		 934 priv->iq_autocal = NULL;
935 priv->output_limit = NULL;
936 priv->curve_data = NULL;
7a047f4f 937 priv->rssi_db = NULL;
0d78156e 938 priv->survey = NULL;
4c8a32f5 939
c96c31e4 940 wiphy_err(dev->wiphy, "eeprom parse failed!\n");
4c8a32f5
CL		 941 return err;
942}
943EXPORT_SYMBOL_GPL(p54_parse_eeprom);
944
945int p54_read_eeprom(struct ieee80211_hw *dev)
946{
947 struct p54_common *priv = dev->priv;
948 size_t eeprom_size = 0x2020, offset = 0, blocksize, maxblocksize;
949 int ret = -ENOMEM;
e6a3f551 950 void *eeprom;
4c8a32f5
CL		 951
952 maxblocksize = EEPROM_READBACK_LEN;
953 if (priv->fw_var >= 0x509)
954 maxblocksize -= 0xc;
955 else
956 maxblocksize -= 0x4;
957
958 eeprom = kzalloc(eeprom_size, GFP_KERNEL);
959 if (unlikely(!eeprom))
960 goto free;
961
962 while (eeprom_size) {
963 blocksize = min(eeprom_size, maxblocksize);
2c208890 964 ret = p54_download_eeprom(priv, eeprom + offset,
4c8a32f5
CL		 965 offset, blocksize);
966 if (unlikely(ret))
967 goto free;
968
969 offset += blocksize;
970 eeprom_size -= blocksize;
971 }
972
973 ret = p54_parse_eeprom(dev, eeprom, offset);
974free:
975 kfree(eeprom);
976 return ret;
977}
978EXPORT_SYMBOL_GPL(p54_read_eeprom);
Linux 6.x block layer and io_uring tree(s)