clocks: tegra12: Use static CPU-EMC co-relation
[linux-3.10.git] / drivers / net / wireless / p54 / eeprom.c
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         int max_power;
80         enum ieee80211_band band;
81 };
82
83 struct 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];
88 };
89
90 static 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
103 static int same_band(u16 freq, u16 freq2)
104 {
105         return p54_get_band_from_freq(freq) == p54_get_band_from_freq(freq2);
106 }
107
108 static 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
114         return a->freq - b->freq;
115 }
116
117 static 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
126 static 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
148 static int p54_generate_band(struct ieee80211_hw *dev,
149                              struct p54_channel_list *list,
150                              unsigned int *chan_num,
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]))
159                 return -EINVAL;
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++) {
176                 struct p54_channel_entry *chan = &list->channels[i];
177                 struct ieee80211_channel *dest = &tmp->channels[j];
178
179                 if (chan->band != band)
180                         continue;
181
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 ? "" :
186                                    " [iqauto calibration data]"),
187                                   (chan->data & CHAN_HAS_LIMIT ? "" :
188                                    " [output power limits]"),
189                                   (chan->data & CHAN_HAS_CURVE ? "" :
190                                    " [curve data]"),
191                                   chan->index, chan->freq);
192                         continue;
193                 }
194
195                 dest->band = chan->band;
196                 dest->center_freq = chan->freq;
197                 dest->max_power = chan->max_power;
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;
203                 dest->hw_value = (*chan_num);
204                 j++;
205                 (*chan_num)++;
206         }
207
208         if (j == 0) {
209                 wiphy_err(dev->wiphy, "Disabling totally damaged %d GHz band\n",
210                           (band == IEEE80211_BAND_2GHZ) ? 2 : 5);
211
212                 ret = -ENODATA;
213                 goto err_out;
214         }
215
216         tmp->n_channels = j;
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
226 err_out:
227         if (tmp) {
228                 kfree(tmp->channels);
229                 kfree(tmp);
230         }
231
232         return ret;
233 }
234
235 static struct p54_channel_entry *p54_update_channel_param(struct p54_channel_list *list,
236                                                           u16 freq, u16 data)
237 {
238         int i;
239         struct p54_channel_entry *entry = NULL;
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) {
248                         entry = &list->channels[i];
249                         break;
250                 }
251         }
252
253         if ((i < 0) && (list->entries < list->max_entries)) {
254                 /* entry does not exist yet. Initialize a new one. */
255                 int band = p54_get_band_from_freq(freq);
256
257                 /*
258                  * filter out frequencies which don't belong into
259                  * any supported band.
260                  */
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         }
273
274         if (entry)
275                 entry->data |= data;
276
277         return entry;
278 }
279
280 static 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_t(u16,
292                                 rawpower, le16_to_cpu(point->val_qpsk));
293                         rawpower = max_t(u16,
294                                 rawpower, le16_to_cpu(point->val_bpsk));
295                         rawpower = max_t(u16,
296                                 rawpower, le16_to_cpu(point->val_16qam));
297                         rawpower = max_t(u16,
298                                 rawpower, le16_to_cpu(point->val_64qam));
299                 }
300                 /* longbow seems to use 1/16 dBm units */
301                 return rawpower / 16;
302                 }
303
304         case PDR_SYNTH_FRONTEND_DUETTE3:
305         case PDR_SYNTH_FRONTEND_DUETTE2:
306         case PDR_SYNTH_FRONTEND_FRISBEE:
307         case PDR_SYNTH_FRONTEND_XBOW: {
308                 struct pda_channel_output_limit *pda = data;
309                 u8 rawpower = 0;
310                 rawpower = max(rawpower, pda->val_qpsk);
311                 rawpower = max(rawpower, pda->val_bpsk);
312                 rawpower = max(rawpower, pda->val_16qam);
313                 rawpower = max(rawpower, pda->val_64qam);
314                 /* raw values are in 1/4 dBm units */
315                 return rawpower / 4;
316                 }
317
318         default:
319                 return 20;
320         }
321 }
322
323 static int p54_generate_channel_lists(struct ieee80211_hw *dev)
324 {
325         struct p54_common *priv = dev->priv;
326         struct p54_channel_list *list;
327         unsigned int i, j, k, max_channel_num;
328         int ret = 0;
329         u16 freq;
330
331         if ((priv->iq_autocal_len != priv->curve_data->entries) ||
332             (priv->iq_autocal_len != priv->output_limit->entries))
333                 wiphy_err(dev->wiphy,
334                           "Unsupported or damaged EEPROM detected. "
335                           "You may not be able to use all channels.\n");
336
337         max_channel_num = max_t(unsigned int, priv->output_limit->entries,
338                                 priv->iq_autocal_len);
339         max_channel_num = max_t(unsigned int, max_channel_num,
340                                 priv->curve_data->entries);
341
342         list = kzalloc(sizeof(*list), GFP_KERNEL);
343         if (!list) {
344                 ret = -ENOMEM;
345                 goto free;
346         }
347         priv->chan_num = max_channel_num;
348         priv->survey = kzalloc(sizeof(struct survey_info) * max_channel_num,
349                                GFP_KERNEL);
350         if (!priv->survey) {
351                 ret = -ENOMEM;
352                 goto free;
353         }
354
355         list->max_entries = max_channel_num;
356         list->channels = kzalloc(sizeof(struct p54_channel_entry) *
357                                  max_channel_num, GFP_KERNEL);
358         if (!list->channels) {
359                 ret = -ENOMEM;
360                 goto free;
361         }
362
363         for (i = 0; i < max_channel_num; i++) {
364                 if (i < priv->iq_autocal_len) {
365                         freq = le16_to_cpu(priv->iq_autocal[i].freq);
366                         p54_update_channel_param(list, freq, CHAN_HAS_CAL);
367                 }
368
369                 if (i < priv->output_limit->entries) {
370                         struct p54_channel_entry *tmp;
371
372                         void *data = (void *) ((unsigned long) i *
373                                 priv->output_limit->entry_size +
374                                 priv->output_limit->offset +
375                                 priv->output_limit->data);
376
377                         freq = le16_to_cpup((__le16 *) data);
378                         tmp = p54_update_channel_param(list, freq,
379                                                        CHAN_HAS_LIMIT);
380                         if (tmp) {
381                                 tmp->max_power = p54_get_maxpower(priv, data);
382                         }
383                 }
384
385                 if (i < priv->curve_data->entries) {
386                         freq = le16_to_cpup((__le16 *) (i *
387                                             priv->curve_data->entry_size +
388                                             priv->curve_data->offset +
389                                             priv->curve_data->data));
390
391                         p54_update_channel_param(list, freq, CHAN_HAS_CURVE);
392                 }
393         }
394
395         /* sort the channel list by frequency */
396         sort(list->channels, list->entries, sizeof(struct p54_channel_entry),
397              p54_compare_channels, NULL);
398
399         k = 0;
400         for (i = 0, j = 0; i < IEEE80211_NUM_BANDS; i++) {
401                 if (p54_generate_band(dev, list, &k, i) == 0)
402                         j++;
403         }
404         if (j == 0) {
405                 /* no useable band available. */
406                 ret = -EINVAL;
407         }
408
409 free:
410         if (list) {
411                 kfree(list->channels);
412                 kfree(list);
413         }
414         if (ret) {
415                 kfree(priv->survey);
416                 priv->survey = NULL;
417         }
418
419         return ret;
420 }
421
422 static int p54_convert_rev0(struct ieee80211_hw *dev,
423                             struct pda_pa_curve_data *curve_data)
424 {
425         struct p54_common *priv = dev->priv;
426         struct p54_pa_curve_data_sample *dst;
427         struct pda_pa_curve_data_sample_rev0 *src;
428         size_t cd_len = sizeof(*curve_data) +
429                 (curve_data->points_per_channel*sizeof(*dst) + 2) *
430                  curve_data->channels;
431         unsigned int i, j;
432         void *source, *target;
433
434         priv->curve_data = kmalloc(sizeof(*priv->curve_data) + cd_len,
435                                    GFP_KERNEL);
436         if (!priv->curve_data)
437                 return -ENOMEM;
438
439         priv->curve_data->entries = curve_data->channels;
440         priv->curve_data->entry_size = sizeof(__le16) +
441                 sizeof(*dst) * curve_data->points_per_channel;
442         priv->curve_data->offset = offsetof(struct pda_pa_curve_data, data);
443         priv->curve_data->len = cd_len;
444         memcpy(priv->curve_data->data, curve_data, sizeof(*curve_data));
445         source = curve_data->data;
446         target = ((struct pda_pa_curve_data *) priv->curve_data->data)->data;
447         for (i = 0; i < curve_data->channels; i++) {
448                 __le16 *freq = source;
449                 source += sizeof(__le16);
450                 *((__le16 *)target) = *freq;
451                 target += sizeof(__le16);
452                 for (j = 0; j < curve_data->points_per_channel; j++) {
453                         dst = target;
454                         src = source;
455
456                         dst->rf_power = src->rf_power;
457                         dst->pa_detector = src->pa_detector;
458                         dst->data_64qam = src->pcv;
459                         /* "invent" the points for the other modulations */
460 #define SUB(x, y) (u8)(((x) - (y)) > (x) ? 0 : (x) - (y))
461                         dst->data_16qam = SUB(src->pcv, 12);
462                         dst->data_qpsk = SUB(dst->data_16qam, 12);
463                         dst->data_bpsk = SUB(dst->data_qpsk, 12);
464                         dst->data_barker = SUB(dst->data_bpsk, 14);
465 #undef SUB
466                         target += sizeof(*dst);
467                         source += sizeof(*src);
468                 }
469         }
470
471         return 0;
472 }
473
474 static int p54_convert_rev1(struct ieee80211_hw *dev,
475                             struct pda_pa_curve_data *curve_data)
476 {
477         struct p54_common *priv = dev->priv;
478         struct p54_pa_curve_data_sample *dst;
479         struct pda_pa_curve_data_sample_rev1 *src;
480         size_t cd_len = sizeof(*curve_data) +
481                 (curve_data->points_per_channel*sizeof(*dst) + 2) *
482                  curve_data->channels;
483         unsigned int i, j;
484         void *source, *target;
485
486         priv->curve_data = kzalloc(cd_len + sizeof(*priv->curve_data),
487                                    GFP_KERNEL);
488         if (!priv->curve_data)
489                 return -ENOMEM;
490
491         priv->curve_data->entries = curve_data->channels;
492         priv->curve_data->entry_size = sizeof(__le16) +
493                 sizeof(*dst) * curve_data->points_per_channel;
494         priv->curve_data->offset = offsetof(struct pda_pa_curve_data, data);
495         priv->curve_data->len = cd_len;
496         memcpy(priv->curve_data->data, curve_data, sizeof(*curve_data));
497         source = curve_data->data;
498         target = ((struct pda_pa_curve_data *) priv->curve_data->data)->data;
499         for (i = 0; i < curve_data->channels; i++) {
500                 __le16 *freq = source;
501                 source += sizeof(__le16);
502                 *((__le16 *)target) = *freq;
503                 target += sizeof(__le16);
504                 for (j = 0; j < curve_data->points_per_channel; j++) {
505                         memcpy(target, source, sizeof(*src));
506
507                         target += sizeof(*dst);
508                         source += sizeof(*src);
509                 }
510                 source++;
511         }
512
513         return 0;
514 }
515
516 static const char *p54_rf_chips[] = { "INVALID-0", "Duette3", "Duette2",
517         "Frisbee", "Xbow", "Longbow", "INVALID-6", "INVALID-7" };
518
519 static int p54_parse_rssical(struct ieee80211_hw *dev,
520                              u8 *data, int len, u16 type)
521 {
522         struct p54_common *priv = dev->priv;
523         struct p54_rssi_db_entry *entry;
524         size_t db_len, entries;
525         int offset = 0, i;
526
527         if (type != PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED) {
528                 entries = (type == PDR_RSSI_LINEAR_APPROXIMATION) ? 1 : 2;
529                 if (len != sizeof(struct pda_rssi_cal_entry) * entries) {
530                         wiphy_err(dev->wiphy, "rssical size mismatch.\n");
531                         goto err_data;
532                 }
533         } else {
534                 /*
535                  * Some devices (Dell 1450 USB, Xbow 5GHz card, etc...)
536                  * have an empty two byte header.
537                  */
538                 if (*((__le16 *)&data[offset]) == cpu_to_le16(0))
539                         offset += 2;
540
541                 entries = (len - offset) /
542                         sizeof(struct pda_rssi_cal_ext_entry);
543
544                 if (len < offset ||
545                     (len - offset) % sizeof(struct pda_rssi_cal_ext_entry) ||
546                     entries == 0) {
547                         wiphy_err(dev->wiphy, "invalid rssi database.\n");
548                         goto err_data;
549                 }
550         }
551
552         db_len = sizeof(*entry) * entries;
553         priv->rssi_db = kzalloc(db_len + sizeof(*priv->rssi_db), GFP_KERNEL);
554         if (!priv->rssi_db)
555                 return -ENOMEM;
556
557         priv->rssi_db->offset = 0;
558         priv->rssi_db->entries = entries;
559         priv->rssi_db->entry_size = sizeof(*entry);
560         priv->rssi_db->len = db_len;
561
562         entry = (void *)((unsigned long)priv->rssi_db->data + priv->rssi_db->offset);
563         if (type == PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED) {
564                 struct pda_rssi_cal_ext_entry *cal = (void *) &data[offset];
565
566                 for (i = 0; i < entries; i++) {
567                         entry[i].freq = le16_to_cpu(cal[i].freq);
568                         entry[i].mul = (s16) le16_to_cpu(cal[i].mul);
569                         entry[i].add = (s16) le16_to_cpu(cal[i].add);
570                 }
571         } else {
572                 struct pda_rssi_cal_entry *cal = (void *) &data[offset];
573
574                 for (i = 0; i < entries; i++) {
575                         u16 freq = 0;
576                         switch (i) {
577                         case IEEE80211_BAND_2GHZ:
578                                 freq = 2437;
579                                 break;
580                         case IEEE80211_BAND_5GHZ:
581                                 freq = 5240;
582                                 break;
583                         }
584
585                         entry[i].freq = freq;
586                         entry[i].mul = (s16) le16_to_cpu(cal[i].mul);
587                         entry[i].add = (s16) le16_to_cpu(cal[i].add);
588                 }
589         }
590
591         /* sort the list by channel frequency */
592         sort(entry, entries, sizeof(*entry), p54_compare_rssichan, NULL);
593         return 0;
594
595 err_data:
596         wiphy_err(dev->wiphy,
597                   "rssi calibration data packing type:(%x) len:%d.\n",
598                   type, len);
599
600         print_hex_dump_bytes("rssical:", DUMP_PREFIX_NONE, data, len);
601
602         wiphy_err(dev->wiphy, "please report this issue.\n");
603         return -EINVAL;
604 }
605
606 struct p54_rssi_db_entry *p54_rssi_find(struct p54_common *priv, const u16 freq)
607 {
608         struct p54_rssi_db_entry *entry;
609         int i, found = -1;
610
611         if (!priv->rssi_db)
612                 return &p54_rssi_default;
613
614         entry = (void *)(priv->rssi_db->data + priv->rssi_db->offset);
615         for (i = 0; i < priv->rssi_db->entries; i++) {
616                 if (!same_band(freq, entry[i].freq))
617                         continue;
618
619                 if (found == -1) {
620                         found = i;
621                         continue;
622                 }
623
624                 /* nearest match */
625                 if (abs(freq - entry[i].freq) <
626                     abs(freq - entry[found].freq)) {
627                         found = i;
628                         continue;
629                 } else {
630                         break;
631                 }
632         }
633
634         return found < 0 ? &p54_rssi_default : &entry[found];
635 }
636
637 static void p54_parse_default_country(struct ieee80211_hw *dev,
638                                       void *data, int len)
639 {
640         struct pda_country *country;
641
642         if (len != sizeof(*country)) {
643                 wiphy_err(dev->wiphy,
644                           "found possible invalid default country eeprom entry. (entry size: %d)\n",
645                           len);
646
647                 print_hex_dump_bytes("country:", DUMP_PREFIX_NONE,
648                                      data, len);
649
650                 wiphy_err(dev->wiphy, "please report this issue.\n");
651                 return;
652         }
653
654         country = (struct pda_country *) data;
655         if (country->flags == PDR_COUNTRY_CERT_CODE_PSEUDO)
656                 regulatory_hint(dev->wiphy, country->alpha2);
657         else {
658                 /* TODO:
659                  * write a shared/common function that converts
660                  * "Regulatory domain codes" (802.11-2007 14.8.2.2)
661                  * into ISO/IEC 3166-1 alpha2 for regulatory_hint.
662                  */
663         }
664 }
665
666 static int p54_convert_output_limits(struct ieee80211_hw *dev,
667                                      u8 *data, size_t len)
668 {
669         struct p54_common *priv = dev->priv;
670
671         if (len < 2)
672                 return -EINVAL;
673
674         if (data[0] != 0) {
675                 wiphy_err(dev->wiphy, "unknown output power db revision:%x\n",
676                           data[0]);
677                 return -EINVAL;
678         }
679
680         if (2 + data[1] * sizeof(struct pda_channel_output_limit) > len)
681                 return -EINVAL;
682
683         priv->output_limit = kmalloc(data[1] *
684                 sizeof(struct pda_channel_output_limit) +
685                 sizeof(*priv->output_limit), GFP_KERNEL);
686
687         if (!priv->output_limit)
688                 return -ENOMEM;
689
690         priv->output_limit->offset = 0;
691         priv->output_limit->entries = data[1];
692         priv->output_limit->entry_size =
693                 sizeof(struct pda_channel_output_limit);
694         priv->output_limit->len = priv->output_limit->entry_size *
695                                   priv->output_limit->entries +
696                                   priv->output_limit->offset;
697
698         memcpy(priv->output_limit->data, &data[2],
699                data[1] * sizeof(struct pda_channel_output_limit));
700
701         return 0;
702 }
703
704 static struct p54_cal_database *p54_convert_db(struct pda_custom_wrapper *src,
705                                                size_t total_len)
706 {
707         struct p54_cal_database *dst;
708         size_t payload_len, entries, entry_size, offset;
709
710         payload_len = le16_to_cpu(src->len);
711         entries = le16_to_cpu(src->entries);
712         entry_size = le16_to_cpu(src->entry_size);
713         offset = le16_to_cpu(src->offset);
714         if (((entries * entry_size + offset) != payload_len) ||
715              (payload_len + sizeof(*src) != total_len))
716                 return NULL;
717
718         dst = kmalloc(sizeof(*dst) + payload_len, GFP_KERNEL);
719         if (!dst)
720                 return NULL;
721
722         dst->entries = entries;
723         dst->entry_size = entry_size;
724         dst->offset = offset;
725         dst->len = payload_len;
726
727         memcpy(dst->data, src->data, payload_len);
728         return dst;
729 }
730
731 int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
732 {
733         struct p54_common *priv = dev->priv;
734         struct eeprom_pda_wrap *wrap;
735         struct pda_entry *entry;
736         unsigned int data_len, entry_len;
737         void *tmp;
738         int err;
739         u8 *end = (u8 *)eeprom + len;
740         u16 synth = 0;
741         u16 crc16 = ~0;
742
743         wrap = (struct eeprom_pda_wrap *) eeprom;
744         entry = (void *)wrap->data + le16_to_cpu(wrap->len);
745
746         /* verify that at least the entry length/code fits */
747         while ((u8 *)entry <= end - sizeof(*entry)) {
748                 entry_len = le16_to_cpu(entry->len);
749                 data_len = ((entry_len - 1) << 1);
750
751                 /* abort if entry exceeds whole structure */
752                 if ((u8 *)entry + sizeof(*entry) + data_len > end)
753                         break;
754
755                 switch (le16_to_cpu(entry->code)) {
756                 case PDR_MAC_ADDRESS:
757                         if (data_len != ETH_ALEN)
758                                 break;
759                         SET_IEEE80211_PERM_ADDR(dev, entry->data);
760                         break;
761                 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS:
762                         if (priv->output_limit)
763                                 break;
764                         err = p54_convert_output_limits(dev, entry->data,
765                                                         data_len);
766                         if (err)
767                                 goto err;
768                         break;
769                 case PDR_PRISM_PA_CAL_CURVE_DATA: {
770                         struct pda_pa_curve_data *curve_data =
771                                 (struct pda_pa_curve_data *)entry->data;
772                         if (data_len < sizeof(*curve_data)) {
773                                 err = -EINVAL;
774                                 goto err;
775                         }
776
777                         switch (curve_data->cal_method_rev) {
778                         case 0:
779                                 err = p54_convert_rev0(dev, curve_data);
780                                 break;
781                         case 1:
782                                 err = p54_convert_rev1(dev, curve_data);
783                                 break;
784                         default:
785                                 wiphy_err(dev->wiphy,
786                                           "unknown curve data revision %d\n",
787                                           curve_data->cal_method_rev);
788                                 err = -ENODEV;
789                                 break;
790                         }
791                         if (err)
792                                 goto err;
793                         }
794                         break;
795                 case PDR_PRISM_ZIF_TX_IQ_CALIBRATION:
796                         priv->iq_autocal = kmemdup(entry->data, data_len,
797                                                    GFP_KERNEL);
798                         if (!priv->iq_autocal) {
799                                 err = -ENOMEM;
800                                 goto err;
801                         }
802
803                         priv->iq_autocal_len = data_len / sizeof(struct pda_iq_autocal_entry);
804                         break;
805                 case PDR_DEFAULT_COUNTRY:
806                         p54_parse_default_country(dev, entry->data, data_len);
807                         break;
808                 case PDR_INTERFACE_LIST:
809                         tmp = entry->data;
810                         while ((u8 *)tmp < entry->data + data_len) {
811                                 struct exp_if *exp_if = tmp;
812                                 if (exp_if->if_id == cpu_to_le16(IF_ID_ISL39000))
813                                         synth = le16_to_cpu(exp_if->variant);
814                                 tmp += sizeof(*exp_if);
815                         }
816                         break;
817                 case PDR_HARDWARE_PLATFORM_COMPONENT_ID:
818                         if (data_len < 2)
819                                 break;
820                         priv->version = *(u8 *)(entry->data + 1);
821                         break;
822                 case PDR_RSSI_LINEAR_APPROXIMATION:
823                 case PDR_RSSI_LINEAR_APPROXIMATION_DUAL_BAND:
824                 case PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED:
825                         err = p54_parse_rssical(dev, entry->data, data_len,
826                                                 le16_to_cpu(entry->code));
827                         if (err)
828                                 goto err;
829                         break;
830                 case PDR_RSSI_LINEAR_APPROXIMATION_CUSTOMV2: {
831                         struct pda_custom_wrapper *pda = (void *) entry->data;
832                         __le16 *src;
833                         u16 *dst;
834                         int i;
835
836                         if (priv->rssi_db || data_len < sizeof(*pda))
837                                 break;
838
839                         priv->rssi_db = p54_convert_db(pda, data_len);
840                         if (!priv->rssi_db)
841                                 break;
842
843                         src = (void *) priv->rssi_db->data;
844                         dst = (void *) priv->rssi_db->data;
845
846                         for (i = 0; i < priv->rssi_db->entries; i++)
847                                 *(dst++) = (s16) le16_to_cpu(*(src++));
848
849                         }
850                         break;
851                 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS_CUSTOM: {
852                         struct pda_custom_wrapper *pda = (void *) entry->data;
853                         if (priv->output_limit || data_len < sizeof(*pda))
854                                 break;
855                         priv->output_limit = p54_convert_db(pda, data_len);
856                         }
857                         break;
858                 case PDR_PRISM_PA_CAL_CURVE_DATA_CUSTOM: {
859                         struct pda_custom_wrapper *pda = (void *) entry->data;
860                         if (priv->curve_data || data_len < sizeof(*pda))
861                                 break;
862                         priv->curve_data = p54_convert_db(pda, data_len);
863                         }
864                         break;
865                 case PDR_END:
866                         crc16 = ~crc_ccitt(crc16, (u8 *) entry, sizeof(*entry));
867                         if (crc16 != le16_to_cpup((__le16 *)entry->data)) {
868                                 wiphy_err(dev->wiphy, "eeprom failed checksum "
869                                          "test!\n");
870                                 err = -ENOMSG;
871                                 goto err;
872                         } else {
873                                 goto good_eeprom;
874                         }
875                         break;
876                 default:
877                         break;
878                 }
879
880                 crc16 = crc_ccitt(crc16, (u8 *)entry, (entry_len + 1) * 2);
881                 entry = (void *)entry + (entry_len + 1) * 2;
882         }
883
884         wiphy_err(dev->wiphy, "unexpected end of eeprom data.\n");
885         err = -ENODATA;
886         goto err;
887
888 good_eeprom:
889         if (!synth || !priv->iq_autocal || !priv->output_limit ||
890             !priv->curve_data) {
891                 wiphy_err(dev->wiphy,
892                           "not all required entries found in eeprom!\n");
893                 err = -EINVAL;
894                 goto err;
895         }
896
897         priv->rxhw = synth & PDR_SYNTH_FRONTEND_MASK;
898
899         err = p54_generate_channel_lists(dev);
900         if (err)
901                 goto err;
902
903         if (priv->rxhw == PDR_SYNTH_FRONTEND_XBOW)
904                 p54_init_xbow_synth(priv);
905         if (!(synth & PDR_SYNTH_24_GHZ_DISABLED))
906                 dev->wiphy->bands[IEEE80211_BAND_2GHZ] =
907                         priv->band_table[IEEE80211_BAND_2GHZ];
908         if (!(synth & PDR_SYNTH_5_GHZ_DISABLED))
909                 dev->wiphy->bands[IEEE80211_BAND_5GHZ] =
910                         priv->band_table[IEEE80211_BAND_5GHZ];
911         if ((synth & PDR_SYNTH_RX_DIV_MASK) == PDR_SYNTH_RX_DIV_SUPPORTED)
912                 priv->rx_diversity_mask = 3;
913         if ((synth & PDR_SYNTH_TX_DIV_MASK) == PDR_SYNTH_TX_DIV_SUPPORTED)
914                 priv->tx_diversity_mask = 3;
915
916         if (!is_valid_ether_addr(dev->wiphy->perm_addr)) {
917                 u8 perm_addr[ETH_ALEN];
918
919                 wiphy_warn(dev->wiphy,
920                            "Invalid hwaddr! Using randomly generated MAC addr\n");
921                 eth_random_addr(perm_addr);
922                 SET_IEEE80211_PERM_ADDR(dev, perm_addr);
923         }
924
925         priv->cur_rssi = &p54_rssi_default;
926
927         wiphy_info(dev->wiphy, "hwaddr %pM, MAC:isl38%02x RF:%s\n",
928                    dev->wiphy->perm_addr, priv->version,
929                    p54_rf_chips[priv->rxhw]);
930
931         return 0;
932
933 err:
934         kfree(priv->iq_autocal);
935         kfree(priv->output_limit);
936         kfree(priv->curve_data);
937         kfree(priv->rssi_db);
938         kfree(priv->survey);
939         priv->iq_autocal = NULL;
940         priv->output_limit = NULL;
941         priv->curve_data = NULL;
942         priv->rssi_db = NULL;
943         priv->survey = NULL;
944
945         wiphy_err(dev->wiphy, "eeprom parse failed!\n");
946         return err;
947 }
948 EXPORT_SYMBOL_GPL(p54_parse_eeprom);
949
950 int p54_read_eeprom(struct ieee80211_hw *dev)
951 {
952         struct p54_common *priv = dev->priv;
953         size_t eeprom_size = 0x2020, offset = 0, blocksize, maxblocksize;
954         int ret = -ENOMEM;
955         void *eeprom;
956
957         maxblocksize = EEPROM_READBACK_LEN;
958         if (priv->fw_var >= 0x509)
959                 maxblocksize -= 0xc;
960         else
961                 maxblocksize -= 0x4;
962
963         eeprom = kzalloc(eeprom_size, GFP_KERNEL);
964         if (unlikely(!eeprom))
965                 goto free;
966
967         while (eeprom_size) {
968                 blocksize = min(eeprom_size, maxblocksize);
969                 ret = p54_download_eeprom(priv, eeprom + offset,
970                                           offset, blocksize);
971                 if (unlikely(ret))
972                         goto free;
973
974                 offset += blocksize;
975                 eeprom_size -= blocksize;
976         }
977
978         ret = p54_parse_eeprom(dev, eeprom, offset);
979 free:
980         kfree(eeprom);
981         return ret;
982 }
983 EXPORT_SYMBOL_GPL(p54_read_eeprom);