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
p54_get_band_from_freq(u16 freq)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
same_band(u16 freq,u16 freq2)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
p54_compare_channels(const void * _a,const void * _b)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
p54_compare_rssichan(const void * _a,const void * _b)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
p54_fill_band_bitrates(struct ieee80211_hw * dev,struct ieee80211_supported_band * band_entry,enum nl80211_band band)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
p54_generate_band(struct ieee80211_hw * dev,struct p54_channel_list * list,unsigned int * chan_num,enum nl80211_band band)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
p54_update_channel_param(struct p54_channel_list * list,u16 freq,u16 data)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
p54_get_maxpower(struct p54_common * priv,void * data)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
p54_generate_channel_lists(struct ieee80211_hw * dev)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
p54_convert_rev0(struct ieee80211_hw * dev,struct pda_pa_curve_data * curve_data)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
p54_convert_rev1(struct ieee80211_hw * dev,struct pda_pa_curve_data * curve_data)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
p54_parse_rssical(struct ieee80211_hw * dev,u8 * data,int len,u16 type)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
p54_rssi_find(struct p54_common * priv,const u16 freq)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
p54_parse_default_country(struct ieee80211_hw * dev,void * data,int len)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
p54_convert_output_limits(struct ieee80211_hw * dev,u8 * data,size_t len)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
p54_convert_db(struct pda_custom_wrapper * src,size_t total_len)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
p54_parse_eeprom(struct ieee80211_hw * dev,void * eeprom,int len)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
p54_read_eeprom(struct ieee80211_hw * dev)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