1 /*
2 * Common code for mac80211 Prism54 drivers
3 *
4 * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
5 * Copyright (c) 2007, 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
23 #include <net/mac80211.h>
24
25 #include "p54.h"
26 #include "p54common.h"
27
28 static int modparam_nohwcrypt;
29 module_param_named(nohwcrypt, modparam_nohwcrypt, bool, S_IRUGO);
30 MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption.");
31 MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
32 MODULE_DESCRIPTION("Softmac Prism54 common code");
33 MODULE_LICENSE("GPL");
34 MODULE_ALIAS("prism54common");
35
36 static struct ieee80211_rate p54_bgrates[] = {
37 { .bitrate = 10, .hw_value = 0, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
38 { .bitrate = 20, .hw_value = 1, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
39 { .bitrate = 55, .hw_value = 2, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
40 { .bitrate = 110, .hw_value = 3, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
41 { .bitrate = 60, .hw_value = 4, },
42 { .bitrate = 90, .hw_value = 5, },
43 { .bitrate = 120, .hw_value = 6, },
44 { .bitrate = 180, .hw_value = 7, },
45 { .bitrate = 240, .hw_value = 8, },
46 { .bitrate = 360, .hw_value = 9, },
47 { .bitrate = 480, .hw_value = 10, },
48 { .bitrate = 540, .hw_value = 11, },
49 };
50
51 static struct ieee80211_channel p54_bgchannels[] = {
52 { .center_freq = 2412, .hw_value = 1, },
53 { .center_freq = 2417, .hw_value = 2, },
54 { .center_freq = 2422, .hw_value = 3, },
55 { .center_freq = 2427, .hw_value = 4, },
56 { .center_freq = 2432, .hw_value = 5, },
57 { .center_freq = 2437, .hw_value = 6, },
58 { .center_freq = 2442, .hw_value = 7, },
59 { .center_freq = 2447, .hw_value = 8, },
60 { .center_freq = 2452, .hw_value = 9, },
61 { .center_freq = 2457, .hw_value = 10, },
62 { .center_freq = 2462, .hw_value = 11, },
63 { .center_freq = 2467, .hw_value = 12, },
64 { .center_freq = 2472, .hw_value = 13, },
65 { .center_freq = 2484, .hw_value = 14, },
66 };
67
68 static struct ieee80211_supported_band band_2GHz = {
69 .channels = p54_bgchannels,
70 .n_channels = ARRAY_SIZE(p54_bgchannels),
71 .bitrates = p54_bgrates,
72 .n_bitrates = ARRAY_SIZE(p54_bgrates),
73 };
74
75 static struct ieee80211_rate p54_arates[] = {
76 { .bitrate = 60, .hw_value = 4, },
77 { .bitrate = 90, .hw_value = 5, },
78 { .bitrate = 120, .hw_value = 6, },
79 { .bitrate = 180, .hw_value = 7, },
80 { .bitrate = 240, .hw_value = 8, },
81 { .bitrate = 360, .hw_value = 9, },
82 { .bitrate = 480, .hw_value = 10, },
83 { .bitrate = 540, .hw_value = 11, },
84 };
85
86 static struct ieee80211_channel p54_achannels[] = {
87 { .center_freq = 4920 },
88 { .center_freq = 4940 },
89 { .center_freq = 4960 },
90 { .center_freq = 4980 },
91 { .center_freq = 5040 },
92 { .center_freq = 5060 },
93 { .center_freq = 5080 },
94 { .center_freq = 5170 },
95 { .center_freq = 5180 },
96 { .center_freq = 5190 },
97 { .center_freq = 5200 },
98 { .center_freq = 5210 },
99 { .center_freq = 5220 },
100 { .center_freq = 5230 },
101 { .center_freq = 5240 },
102 { .center_freq = 5260 },
103 { .center_freq = 5280 },
104 { .center_freq = 5300 },
105 { .center_freq = 5320 },
106 { .center_freq = 5500 },
107 { .center_freq = 5520 },
108 { .center_freq = 5540 },
109 { .center_freq = 5560 },
110 { .center_freq = 5580 },
111 { .center_freq = 5600 },
112 { .center_freq = 5620 },
113 { .center_freq = 5640 },
114 { .center_freq = 5660 },
115 { .center_freq = 5680 },
116 { .center_freq = 5700 },
117 { .center_freq = 5745 },
118 { .center_freq = 5765 },
119 { .center_freq = 5785 },
120 { .center_freq = 5805 },
121 { .center_freq = 5825 },
122 };
123
124 static struct ieee80211_supported_band band_5GHz = {
125 .channels = p54_achannels,
126 .n_channels = ARRAY_SIZE(p54_achannels),
127 .bitrates = p54_arates,
128 .n_bitrates = ARRAY_SIZE(p54_arates),
129 };
130
p54_parse_firmware(struct ieee80211_hw * dev,const struct firmware * fw)131 int p54_parse_firmware(struct ieee80211_hw *dev, const struct firmware *fw)
132 {
133 struct p54_common *priv = dev->priv;
134 struct bootrec_exp_if *exp_if;
135 struct bootrec *bootrec;
136 u32 *data = (u32 *)fw->data;
137 u32 *end_data = (u32 *)fw->data + (fw->size >> 2);
138 u8 *fw_version = NULL;
139 size_t len;
140 int i;
141 int maxlen;
142
143 if (priv->rx_start)
144 return 0;
145
146 while (data < end_data && *data)
147 data++;
148
149 while (data < end_data && !*data)
150 data++;
151
152 bootrec = (struct bootrec *) data;
153
154 while (bootrec->data <= end_data &&
155 (bootrec->data + (len = le32_to_cpu(bootrec->len))) <= end_data) {
156 u32 code = le32_to_cpu(bootrec->code);
157 switch (code) {
158 case BR_CODE_COMPONENT_ID:
159 priv->fw_interface = be32_to_cpup((__be32 *)
160 bootrec->data);
161 switch (priv->fw_interface) {
162 case FW_LM86:
163 case FW_LM20:
164 case FW_LM87: {
165 char *iftype = (char *)bootrec->data;
166 printk(KERN_INFO "%s: p54 detected a LM%c%c "
167 "firmware\n",
168 wiphy_name(dev->wiphy),
169 iftype[2], iftype[3]);
170 break;
171 }
172 case FW_FMAC:
173 default:
174 printk(KERN_ERR "%s: unsupported firmware\n",
175 wiphy_name(dev->wiphy));
176 return -ENODEV;
177 }
178 break;
179 case BR_CODE_COMPONENT_VERSION:
180 /* 24 bytes should be enough for all firmwares */
181 if (strnlen((unsigned char*)bootrec->data, 24) < 24)
182 fw_version = (unsigned char*)bootrec->data;
183 break;
184 case BR_CODE_DESCR: {
185 struct bootrec_desc *desc =
186 (struct bootrec_desc *)bootrec->data;
187 priv->rx_start = le32_to_cpu(desc->rx_start);
188 /* FIXME add sanity checking */
189 priv->rx_end = le32_to_cpu(desc->rx_end) - 0x3500;
190 priv->headroom = desc->headroom;
191 priv->tailroom = desc->tailroom;
192 priv->privacy_caps = desc->privacy_caps;
193 priv->rx_keycache_size = desc->rx_keycache_size;
194 if (le32_to_cpu(bootrec->len) == 11)
195 priv->rx_mtu = le16_to_cpu(desc->rx_mtu);
196 else
197 priv->rx_mtu = (size_t)
198 0x620 - priv->tx_hdr_len;
199 maxlen = priv->tx_hdr_len + /* USB devices */
200 sizeof(struct p54_rx_data) +
201 4 + /* rx alignment */
202 IEEE80211_MAX_FRAG_THRESHOLD;
203 if (priv->rx_mtu > maxlen && PAGE_SIZE == 4096) {
204 printk(KERN_INFO "p54: rx_mtu reduced from %d "
205 "to %d\n", priv->rx_mtu,
206 maxlen);
207 priv->rx_mtu = maxlen;
208 }
209 break;
210 }
211 case BR_CODE_EXPOSED_IF:
212 exp_if = (struct bootrec_exp_if *) bootrec->data;
213 for (i = 0; i < (len * sizeof(*exp_if) / 4); i++)
214 if (exp_if[i].if_id == cpu_to_le16(0x1a))
215 priv->fw_var = le16_to_cpu(exp_if[i].variant);
216 break;
217 case BR_CODE_DEPENDENT_IF:
218 break;
219 case BR_CODE_END_OF_BRA:
220 case LEGACY_BR_CODE_END_OF_BRA:
221 end_data = NULL;
222 break;
223 default:
224 break;
225 }
226 bootrec = (struct bootrec *)&bootrec->data[len];
227 }
228
229 if (fw_version)
230 printk(KERN_INFO "%s: FW rev %s - Softmac protocol %x.%x\n",
231 wiphy_name(dev->wiphy), fw_version,
232 priv->fw_var >> 8, priv->fw_var & 0xff);
233
234 if (priv->fw_var < 0x500)
235 printk(KERN_INFO "%s: you are using an obsolete firmware. "
236 "visit http://wireless.kernel.org/en/users/Drivers/p54 "
237 "and grab one for \"kernel >= 2.6.28\"!\n",
238 wiphy_name(dev->wiphy));
239
240 if (priv->fw_var >= 0x300) {
241 /* Firmware supports QoS, use it! */
242 priv->tx_stats[4].limit = 3; /* AC_VO */
243 priv->tx_stats[5].limit = 4; /* AC_VI */
244 priv->tx_stats[6].limit = 3; /* AC_BE */
245 priv->tx_stats[7].limit = 2; /* AC_BK */
246 dev->queues = 4;
247 }
248
249 if (!modparam_nohwcrypt)
250 printk(KERN_INFO "%s: cryptographic accelerator "
251 "WEP:%s, TKIP:%s, CCMP:%s\n",
252 wiphy_name(dev->wiphy),
253 (priv->privacy_caps & BR_DESC_PRIV_CAP_WEP) ? "YES" :
254 "no", (priv->privacy_caps & (BR_DESC_PRIV_CAP_TKIP |
255 BR_DESC_PRIV_CAP_MICHAEL)) ? "YES" : "no",
256 (priv->privacy_caps & BR_DESC_PRIV_CAP_AESCCMP) ?
257 "YES" : "no");
258
259 return 0;
260 }
261 EXPORT_SYMBOL_GPL(p54_parse_firmware);
262
p54_convert_rev0(struct ieee80211_hw * dev,struct pda_pa_curve_data * curve_data)263 static int p54_convert_rev0(struct ieee80211_hw *dev,
264 struct pda_pa_curve_data *curve_data)
265 {
266 struct p54_common *priv = dev->priv;
267 struct p54_pa_curve_data_sample *dst;
268 struct pda_pa_curve_data_sample_rev0 *src;
269 size_t cd_len = sizeof(*curve_data) +
270 (curve_data->points_per_channel*sizeof(*dst) + 2) *
271 curve_data->channels;
272 unsigned int i, j;
273 void *source, *target;
274
275 priv->curve_data = kmalloc(cd_len, GFP_KERNEL);
276 if (!priv->curve_data)
277 return -ENOMEM;
278
279 memcpy(priv->curve_data, curve_data, sizeof(*curve_data));
280 source = curve_data->data;
281 target = priv->curve_data->data;
282 for (i = 0; i < curve_data->channels; i++) {
283 __le16 *freq = source;
284 source += sizeof(__le16);
285 *((__le16 *)target) = *freq;
286 target += sizeof(__le16);
287 for (j = 0; j < curve_data->points_per_channel; j++) {
288 dst = target;
289 src = source;
290
291 dst->rf_power = src->rf_power;
292 dst->pa_detector = src->pa_detector;
293 dst->data_64qam = src->pcv;
294 /* "invent" the points for the other modulations */
295 #define SUB(x,y) (u8)((x) - (y)) > (x) ? 0 : (x) - (y)
296 dst->data_16qam = SUB(src->pcv, 12);
297 dst->data_qpsk = SUB(dst->data_16qam, 12);
298 dst->data_bpsk = SUB(dst->data_qpsk, 12);
299 dst->data_barker = SUB(dst->data_bpsk, 14);
300 #undef SUB
301 target += sizeof(*dst);
302 source += sizeof(*src);
303 }
304 }
305
306 return 0;
307 }
308
p54_convert_rev1(struct ieee80211_hw * dev,struct pda_pa_curve_data * curve_data)309 static int p54_convert_rev1(struct ieee80211_hw *dev,
310 struct pda_pa_curve_data *curve_data)
311 {
312 struct p54_common *priv = dev->priv;
313 struct p54_pa_curve_data_sample *dst;
314 struct pda_pa_curve_data_sample_rev1 *src;
315 size_t cd_len = sizeof(*curve_data) +
316 (curve_data->points_per_channel*sizeof(*dst) + 2) *
317 curve_data->channels;
318 unsigned int i, j;
319 void *source, *target;
320
321 priv->curve_data = kmalloc(cd_len, GFP_KERNEL);
322 if (!priv->curve_data)
323 return -ENOMEM;
324
325 memcpy(priv->curve_data, curve_data, sizeof(*curve_data));
326 source = curve_data->data;
327 target = priv->curve_data->data;
328 for (i = 0; i < curve_data->channels; i++) {
329 __le16 *freq = source;
330 source += sizeof(__le16);
331 *((__le16 *)target) = *freq;
332 target += sizeof(__le16);
333 for (j = 0; j < curve_data->points_per_channel; j++) {
334 memcpy(target, source, sizeof(*src));
335
336 target += sizeof(*dst);
337 source += sizeof(*src);
338 }
339 source++;
340 }
341
342 return 0;
343 }
344
345 static const char *p54_rf_chips[] = { "NULL", "Duette3", "Duette2",
346 "Frisbee", "Xbow", "Longbow", "NULL", "NULL" };
347 static int p54_init_xbow_synth(struct ieee80211_hw *dev);
348
p54_parse_rssical(struct ieee80211_hw * dev,void * data,int len,u16 type)349 static void p54_parse_rssical(struct ieee80211_hw *dev, void *data, int len,
350 u16 type)
351 {
352 struct p54_common *priv = dev->priv;
353 int offset = (type == PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED) ? 2 : 0;
354 int entry_size = sizeof(struct pda_rssi_cal_entry) + offset;
355 int num_entries = (type == PDR_RSSI_LINEAR_APPROXIMATION) ? 1 : 2;
356 int i;
357
358 if (len != (entry_size * num_entries)) {
359 printk(KERN_ERR "%s: unknown rssi calibration data packing "
360 " type:(%x) len:%d.\n",
361 wiphy_name(dev->wiphy), type, len);
362
363 print_hex_dump_bytes("rssical:", DUMP_PREFIX_NONE,
364 data, len);
365
366 printk(KERN_ERR "%s: please report this issue.\n",
367 wiphy_name(dev->wiphy));
368 return;
369 }
370
371 for (i = 0; i < num_entries; i++) {
372 struct pda_rssi_cal_entry *cal = data +
373 (offset + i * entry_size);
374 priv->rssical_db[i].mul = (s16) le16_to_cpu(cal->mul);
375 priv->rssical_db[i].add = (s16) le16_to_cpu(cal->add);
376 }
377 }
378
p54_parse_eeprom(struct ieee80211_hw * dev,void * eeprom,int len)379 static int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
380 {
381 struct p54_common *priv = dev->priv;
382 struct eeprom_pda_wrap *wrap = NULL;
383 struct pda_entry *entry;
384 unsigned int data_len, entry_len;
385 void *tmp;
386 int err;
387 u8 *end = (u8 *)eeprom + len;
388 u16 synth = 0;
389
390 wrap = (struct eeprom_pda_wrap *) eeprom;
391 entry = (void *)wrap->data + le16_to_cpu(wrap->len);
392
393 /* verify that at least the entry length/code fits */
394 while ((u8 *)entry <= end - sizeof(*entry)) {
395 entry_len = le16_to_cpu(entry->len);
396 data_len = ((entry_len - 1) << 1);
397
398 /* abort if entry exceeds whole structure */
399 if ((u8 *)entry + sizeof(*entry) + data_len > end)
400 break;
401
402 switch (le16_to_cpu(entry->code)) {
403 case PDR_MAC_ADDRESS:
404 SET_IEEE80211_PERM_ADDR(dev, entry->data);
405 break;
406 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS:
407 if (data_len < 2) {
408 err = -EINVAL;
409 goto err;
410 }
411
412 if (2 + entry->data[1]*sizeof(*priv->output_limit) > data_len) {
413 err = -EINVAL;
414 goto err;
415 }
416
417 priv->output_limit = kmalloc(entry->data[1] *
418 sizeof(*priv->output_limit), GFP_KERNEL);
419
420 if (!priv->output_limit) {
421 err = -ENOMEM;
422 goto err;
423 }
424
425 memcpy(priv->output_limit, &entry->data[2],
426 entry->data[1]*sizeof(*priv->output_limit));
427 priv->output_limit_len = entry->data[1];
428 break;
429 case PDR_PRISM_PA_CAL_CURVE_DATA: {
430 struct pda_pa_curve_data *curve_data =
431 (struct pda_pa_curve_data *)entry->data;
432 if (data_len < sizeof(*curve_data)) {
433 err = -EINVAL;
434 goto err;
435 }
436
437 switch (curve_data->cal_method_rev) {
438 case 0:
439 err = p54_convert_rev0(dev, curve_data);
440 break;
441 case 1:
442 err = p54_convert_rev1(dev, curve_data);
443 break;
444 default:
445 printk(KERN_ERR "%s: unknown curve data "
446 "revision %d\n",
447 wiphy_name(dev->wiphy),
448 curve_data->cal_method_rev);
449 err = -ENODEV;
450 break;
451 }
452 if (err)
453 goto err;
454 }
455 break;
456 case PDR_PRISM_ZIF_TX_IQ_CALIBRATION:
457 priv->iq_autocal = kmalloc(data_len, GFP_KERNEL);
458 if (!priv->iq_autocal) {
459 err = -ENOMEM;
460 goto err;
461 }
462
463 memcpy(priv->iq_autocal, entry->data, data_len);
464 priv->iq_autocal_len = data_len / sizeof(struct pda_iq_autocal_entry);
465 break;
466 case PDR_INTERFACE_LIST:
467 tmp = entry->data;
468 while ((u8 *)tmp < entry->data + data_len) {
469 struct bootrec_exp_if *exp_if = tmp;
470 if (le16_to_cpu(exp_if->if_id) == 0xf)
471 synth = le16_to_cpu(exp_if->variant);
472 tmp += sizeof(struct bootrec_exp_if);
473 }
474 break;
475 case PDR_HARDWARE_PLATFORM_COMPONENT_ID:
476 priv->version = *(u8 *)(entry->data + 1);
477 break;
478 case PDR_RSSI_LINEAR_APPROXIMATION:
479 case PDR_RSSI_LINEAR_APPROXIMATION_DUAL_BAND:
480 case PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED:
481 p54_parse_rssical(dev, entry->data, data_len,
482 le16_to_cpu(entry->code));
483 break;
484 case PDR_END:
485 /* make it overrun */
486 entry_len = len;
487 break;
488 case PDR_MANUFACTURING_PART_NUMBER:
489 case PDR_PDA_VERSION:
490 case PDR_NIC_SERIAL_NUMBER:
491 case PDR_REGULATORY_DOMAIN_LIST:
492 case PDR_TEMPERATURE_TYPE:
493 case PDR_PRISM_PCI_IDENTIFIER:
494 case PDR_COUNTRY_INFORMATION:
495 case PDR_OEM_NAME:
496 case PDR_PRODUCT_NAME:
497 case PDR_UTF8_OEM_NAME:
498 case PDR_UTF8_PRODUCT_NAME:
499 case PDR_COUNTRY_LIST:
500 case PDR_DEFAULT_COUNTRY:
501 case PDR_ANTENNA_GAIN:
502 case PDR_PRISM_INDIGO_PA_CALIBRATION_DATA:
503 case PDR_REGULATORY_POWER_LIMITS:
504 case PDR_RADIATED_TRANSMISSION_CORRECTION:
505 case PDR_PRISM_TX_IQ_CALIBRATION:
506 case PDR_BASEBAND_REGISTERS:
507 case PDR_PER_CHANNEL_BASEBAND_REGISTERS:
508 break;
509 default:
510 printk(KERN_INFO "%s: unknown eeprom code : 0x%x\n",
511 wiphy_name(dev->wiphy),
512 le16_to_cpu(entry->code));
513 break;
514 }
515
516 entry = (void *)entry + (entry_len + 1)*2;
517 }
518
519 if (!synth || !priv->iq_autocal || !priv->output_limit ||
520 !priv->curve_data) {
521 printk(KERN_ERR "%s: not all required entries found in eeprom!\n",
522 wiphy_name(dev->wiphy));
523 err = -EINVAL;
524 goto err;
525 }
526
527 priv->rxhw = synth & PDR_SYNTH_FRONTEND_MASK;
528 if (priv->rxhw == 4)
529 p54_init_xbow_synth(dev);
530 if (!(synth & PDR_SYNTH_24_GHZ_DISABLED))
531 dev->wiphy->bands[IEEE80211_BAND_2GHZ] = &band_2GHz;
532 if (!(synth & PDR_SYNTH_5_GHZ_DISABLED))
533 dev->wiphy->bands[IEEE80211_BAND_5GHZ] = &band_5GHz;
534
535 if (!is_valid_ether_addr(dev->wiphy->perm_addr)) {
536 u8 perm_addr[ETH_ALEN];
537
538 printk(KERN_WARNING "%s: Invalid hwaddr! Using randomly generated MAC addr\n",
539 wiphy_name(dev->wiphy));
540 random_ether_addr(perm_addr);
541 SET_IEEE80211_PERM_ADDR(dev, perm_addr);
542 }
543
544 printk(KERN_INFO "%s: hwaddr %pM, MAC:isl38%02x RF:%s\n",
545 wiphy_name(dev->wiphy),
546 dev->wiphy->perm_addr,
547 priv->version, p54_rf_chips[priv->rxhw]);
548
549 return 0;
550
551 err:
552 if (priv->iq_autocal) {
553 kfree(priv->iq_autocal);
554 priv->iq_autocal = NULL;
555 }
556
557 if (priv->output_limit) {
558 kfree(priv->output_limit);
559 priv->output_limit = NULL;
560 }
561
562 if (priv->curve_data) {
563 kfree(priv->curve_data);
564 priv->curve_data = NULL;
565 }
566
567 printk(KERN_ERR "%s: eeprom parse failed!\n",
568 wiphy_name(dev->wiphy));
569 return err;
570 }
571
p54_rssi_to_dbm(struct ieee80211_hw * dev,int rssi)572 static int p54_rssi_to_dbm(struct ieee80211_hw *dev, int rssi)
573 {
574 struct p54_common *priv = dev->priv;
575 int band = dev->conf.channel->band;
576
577 return ((rssi * priv->rssical_db[band].mul) / 64 +
578 priv->rssical_db[band].add) / 4;
579 }
580
p54_rx_data(struct ieee80211_hw * dev,struct sk_buff * skb)581 static int p54_rx_data(struct ieee80211_hw *dev, struct sk_buff *skb)
582 {
583 struct p54_common *priv = dev->priv;
584 struct p54_rx_data *hdr = (struct p54_rx_data *) skb->data;
585 struct ieee80211_rx_status rx_status = {0};
586 u16 freq = le16_to_cpu(hdr->freq);
587 size_t header_len = sizeof(*hdr);
588 u32 tsf32;
589 u8 rate = hdr->rate & 0xf;
590
591 /*
592 * If the device is in a unspecified state we have to
593 * ignore all data frames. Else we could end up with a
594 * nasty crash.
595 */
596 if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
597 return 0;
598
599 if (!(hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_IN_FCS_GOOD))) {
600 if (priv->filter_flags & FIF_FCSFAIL)
601 rx_status.flag |= RX_FLAG_FAILED_FCS_CRC;
602 else
603 return 0;
604 }
605
606 if (hdr->decrypt_status == P54_DECRYPT_OK)
607 rx_status.flag |= RX_FLAG_DECRYPTED;
608 if ((hdr->decrypt_status == P54_DECRYPT_FAIL_MICHAEL) ||
609 (hdr->decrypt_status == P54_DECRYPT_FAIL_TKIP))
610 rx_status.flag |= RX_FLAG_MMIC_ERROR;
611
612 rx_status.signal = p54_rssi_to_dbm(dev, hdr->rssi);
613 rx_status.noise = priv->noise;
614 /* XX correct? */
615 rx_status.qual = (100 * hdr->rssi) / 127;
616 if (hdr->rate & 0x10)
617 rx_status.flag |= RX_FLAG_SHORTPRE;
618 if (dev->conf.channel->band == IEEE80211_BAND_5GHZ)
619 rx_status.rate_idx = (rate < 4) ? 0 : rate - 4;
620 else
621 rx_status.rate_idx = rate;
622
623 rx_status.freq = freq;
624 rx_status.band = dev->conf.channel->band;
625 rx_status.antenna = hdr->antenna;
626
627 tsf32 = le32_to_cpu(hdr->tsf32);
628 if (tsf32 < priv->tsf_low32)
629 priv->tsf_high32++;
630 rx_status.mactime = ((u64)priv->tsf_high32) << 32 | tsf32;
631 priv->tsf_low32 = tsf32;
632
633 rx_status.flag |= RX_FLAG_TSFT;
634
635 if (hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_ALIGN))
636 header_len += hdr->align[0];
637
638 skb_pull(skb, header_len);
639 skb_trim(skb, le16_to_cpu(hdr->len));
640
641 ieee80211_rx_irqsafe(dev, skb, &rx_status);
642
643 queue_delayed_work(dev->workqueue, &priv->work,
644 msecs_to_jiffies(P54_STATISTICS_UPDATE));
645
646 return -1;
647 }
648
p54_wake_free_queues(struct ieee80211_hw * dev)649 static void inline p54_wake_free_queues(struct ieee80211_hw *dev)
650 {
651 struct p54_common *priv = dev->priv;
652 int i;
653
654 if (priv->mode == NL80211_IFTYPE_UNSPECIFIED)
655 return ;
656
657 for (i = 0; i < dev->queues; i++)
658 if (priv->tx_stats[i + 4].len < priv->tx_stats[i + 4].limit)
659 ieee80211_wake_queue(dev, i);
660 }
661
p54_free_skb(struct ieee80211_hw * dev,struct sk_buff * skb)662 void p54_free_skb(struct ieee80211_hw *dev, struct sk_buff *skb)
663 {
664 struct p54_common *priv = dev->priv;
665 struct ieee80211_tx_info *info;
666 struct memrecord *range;
667 unsigned long flags;
668 u32 freed = 0, last_addr = priv->rx_start;
669
670 if (unlikely(!skb || !dev || !skb_queue_len(&priv->tx_queue)))
671 return;
672
673 /*
674 * don't try to free an already unlinked skb
675 */
676 if (unlikely((!skb->next) || (!skb->prev)))
677 return;
678
679 spin_lock_irqsave(&priv->tx_queue.lock, flags);
680 info = IEEE80211_SKB_CB(skb);
681 range = (void *)info->rate_driver_data;
682 if (skb->prev != (struct sk_buff *)&priv->tx_queue) {
683 struct ieee80211_tx_info *ni;
684 struct memrecord *mr;
685
686 ni = IEEE80211_SKB_CB(skb->prev);
687 mr = (struct memrecord *)ni->rate_driver_data;
688 last_addr = mr->end_addr;
689 }
690 if (skb->next != (struct sk_buff *)&priv->tx_queue) {
691 struct ieee80211_tx_info *ni;
692 struct memrecord *mr;
693
694 ni = IEEE80211_SKB_CB(skb->next);
695 mr = (struct memrecord *)ni->rate_driver_data;
696 freed = mr->start_addr - last_addr;
697 } else
698 freed = priv->rx_end - last_addr;
699 __skb_unlink(skb, &priv->tx_queue);
700 spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
701 dev_kfree_skb_any(skb);
702
703 if (freed >= priv->headroom + sizeof(struct p54_hdr) + 48 +
704 IEEE80211_MAX_RTS_THRESHOLD + priv->tailroom)
705 p54_wake_free_queues(dev);
706 }
707 EXPORT_SYMBOL_GPL(p54_free_skb);
708
p54_find_tx_entry(struct ieee80211_hw * dev,__le32 req_id)709 static struct sk_buff *p54_find_tx_entry(struct ieee80211_hw *dev,
710 __le32 req_id)
711 {
712 struct p54_common *priv = dev->priv;
713 struct sk_buff *entry;
714 unsigned long flags;
715
716 spin_lock_irqsave(&priv->tx_queue.lock, flags);
717 entry = priv->tx_queue.next;
718 while (entry != (struct sk_buff *)&priv->tx_queue) {
719 struct p54_hdr *hdr = (struct p54_hdr *) entry->data;
720
721 if (hdr->req_id == req_id) {
722 spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
723 return entry;
724 }
725 entry = entry->next;
726 }
727 spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
728 return NULL;
729 }
730
p54_rx_frame_sent(struct ieee80211_hw * dev,struct sk_buff * skb)731 static void p54_rx_frame_sent(struct ieee80211_hw *dev, struct sk_buff *skb)
732 {
733 struct p54_common *priv = dev->priv;
734 struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
735 struct p54_frame_sent *payload = (struct p54_frame_sent *) hdr->data;
736 struct sk_buff *entry;
737 u32 addr = le32_to_cpu(hdr->req_id) - priv->headroom;
738 struct memrecord *range = NULL;
739 u32 freed = 0;
740 u32 last_addr = priv->rx_start;
741 unsigned long flags;
742 int count, idx;
743
744 spin_lock_irqsave(&priv->tx_queue.lock, flags);
745 entry = (struct sk_buff *) priv->tx_queue.next;
746 while (entry != (struct sk_buff *)&priv->tx_queue) {
747 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(entry);
748 struct p54_hdr *entry_hdr;
749 struct p54_tx_data *entry_data;
750 unsigned int pad = 0, frame_len;
751
752 range = (void *)info->rate_driver_data;
753 if (range->start_addr != addr) {
754 last_addr = range->end_addr;
755 entry = entry->next;
756 continue;
757 }
758
759 if (entry->next != (struct sk_buff *)&priv->tx_queue) {
760 struct ieee80211_tx_info *ni;
761 struct memrecord *mr;
762
763 ni = IEEE80211_SKB_CB(entry->next);
764 mr = (struct memrecord *)ni->rate_driver_data;
765 freed = mr->start_addr - last_addr;
766 } else
767 freed = priv->rx_end - last_addr;
768
769 last_addr = range->end_addr;
770 __skb_unlink(entry, &priv->tx_queue);
771 spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
772
773 frame_len = entry->len;
774 entry_hdr = (struct p54_hdr *) entry->data;
775 entry_data = (struct p54_tx_data *) entry_hdr->data;
776 priv->tx_stats[entry_data->hw_queue].len--;
777 priv->stats.dot11ACKFailureCount += payload->tries - 1;
778
779 if (unlikely(entry == priv->cached_beacon)) {
780 kfree_skb(entry);
781 priv->cached_beacon = NULL;
782 goto out;
783 }
784
785 /*
786 * Clear manually, ieee80211_tx_info_clear_status would
787 * clear the counts too and we need them.
788 */
789 memset(&info->status.ampdu_ack_len, 0,
790 sizeof(struct ieee80211_tx_info) -
791 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len));
792 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info,
793 status.ampdu_ack_len) != 23);
794
795 if (entry_hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_ALIGN))
796 pad = entry_data->align[0];
797
798 /* walk through the rates array and adjust the counts */
799 count = payload->tries;
800 for (idx = 0; idx < 4; idx++) {
801 if (count >= info->status.rates[idx].count) {
802 count -= info->status.rates[idx].count;
803 } else if (count > 0) {
804 info->status.rates[idx].count = count;
805 count = 0;
806 } else {
807 info->status.rates[idx].idx = -1;
808 info->status.rates[idx].count = 0;
809 }
810 }
811
812 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) &&
813 (!payload->status))
814 info->flags |= IEEE80211_TX_STAT_ACK;
815 if (payload->status & P54_TX_PSM_CANCELLED)
816 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
817 info->status.ack_signal = p54_rssi_to_dbm(dev,
818 (int)payload->ack_rssi);
819
820 /* Undo all changes to the frame. */
821 switch (entry_data->key_type) {
822 case P54_CRYPTO_TKIPMICHAEL: {
823 u8 *iv = (u8 *)(entry_data->align + pad +
824 entry_data->crypt_offset);
825
826 /* Restore the original TKIP IV. */
827 iv[2] = iv[0];
828 iv[0] = iv[1];
829 iv[1] = (iv[0] | 0x20) & 0x7f; /* WEPSeed - 8.3.2.2 */
830
831 frame_len -= 12; /* remove TKIP_MMIC + TKIP_ICV */
832 break;
833 }
834 case P54_CRYPTO_AESCCMP:
835 frame_len -= 8; /* remove CCMP_MIC */
836 break;
837 case P54_CRYPTO_WEP:
838 frame_len -= 4; /* remove WEP_ICV */
839 break;
840 }
841 skb_trim(entry, frame_len);
842 skb_pull(entry, sizeof(*hdr) + pad + sizeof(*entry_data));
843 ieee80211_tx_status_irqsafe(dev, entry);
844 goto out;
845 }
846 spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
847
848 out:
849 if (freed >= priv->headroom + sizeof(struct p54_hdr) + 48 +
850 IEEE80211_MAX_RTS_THRESHOLD + priv->tailroom)
851 p54_wake_free_queues(dev);
852 }
853
p54_rx_eeprom_readback(struct ieee80211_hw * dev,struct sk_buff * skb)854 static void p54_rx_eeprom_readback(struct ieee80211_hw *dev,
855 struct sk_buff *skb)
856 {
857 struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
858 struct p54_eeprom_lm86 *eeprom = (struct p54_eeprom_lm86 *) hdr->data;
859 struct p54_common *priv = dev->priv;
860
861 if (!priv->eeprom)
862 return ;
863
864 if (priv->fw_var >= 0x509) {
865 memcpy(priv->eeprom, eeprom->v2.data,
866 le16_to_cpu(eeprom->v2.len));
867 } else {
868 memcpy(priv->eeprom, eeprom->v1.data,
869 le16_to_cpu(eeprom->v1.len));
870 }
871
872 complete(&priv->eeprom_comp);
873 }
874
p54_rx_stats(struct ieee80211_hw * dev,struct sk_buff * skb)875 static void p54_rx_stats(struct ieee80211_hw *dev, struct sk_buff *skb)
876 {
877 struct p54_common *priv = dev->priv;
878 struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
879 struct p54_statistics *stats = (struct p54_statistics *) hdr->data;
880 u32 tsf32;
881
882 if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
883 return ;
884
885 tsf32 = le32_to_cpu(stats->tsf32);
886 if (tsf32 < priv->tsf_low32)
887 priv->tsf_high32++;
888 priv->tsf_low32 = tsf32;
889
890 priv->stats.dot11RTSFailureCount = le32_to_cpu(stats->rts_fail);
891 priv->stats.dot11RTSSuccessCount = le32_to_cpu(stats->rts_success);
892 priv->stats.dot11FCSErrorCount = le32_to_cpu(stats->rx_bad_fcs);
893
894 priv->noise = p54_rssi_to_dbm(dev, le32_to_cpu(stats->noise));
895
896 p54_free_skb(dev, p54_find_tx_entry(dev, hdr->req_id));
897 }
898
p54_rx_trap(struct ieee80211_hw * dev,struct sk_buff * skb)899 static void p54_rx_trap(struct ieee80211_hw *dev, struct sk_buff *skb)
900 {
901 struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
902 struct p54_trap *trap = (struct p54_trap *) hdr->data;
903 u16 event = le16_to_cpu(trap->event);
904 u16 freq = le16_to_cpu(trap->frequency);
905
906 switch (event) {
907 case P54_TRAP_BEACON_TX:
908 break;
909 case P54_TRAP_RADAR:
910 printk(KERN_INFO "%s: radar (freq:%d MHz)\n",
911 wiphy_name(dev->wiphy), freq);
912 break;
913 case P54_TRAP_NO_BEACON:
914 break;
915 case P54_TRAP_SCAN:
916 break;
917 case P54_TRAP_TBTT:
918 break;
919 case P54_TRAP_TIMER:
920 break;
921 default:
922 printk(KERN_INFO "%s: received event:%x freq:%d\n",
923 wiphy_name(dev->wiphy), event, freq);
924 break;
925 }
926 }
927
p54_rx_control(struct ieee80211_hw * dev,struct sk_buff * skb)928 static int p54_rx_control(struct ieee80211_hw *dev, struct sk_buff *skb)
929 {
930 struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
931
932 switch (le16_to_cpu(hdr->type)) {
933 case P54_CONTROL_TYPE_TXDONE:
934 p54_rx_frame_sent(dev, skb);
935 break;
936 case P54_CONTROL_TYPE_TRAP:
937 p54_rx_trap(dev, skb);
938 break;
939 case P54_CONTROL_TYPE_BBP:
940 break;
941 case P54_CONTROL_TYPE_STAT_READBACK:
942 p54_rx_stats(dev, skb);
943 break;
944 case P54_CONTROL_TYPE_EEPROM_READBACK:
945 p54_rx_eeprom_readback(dev, skb);
946 break;
947 default:
948 printk(KERN_DEBUG "%s: not handling 0x%02x type control frame\n",
949 wiphy_name(dev->wiphy), le16_to_cpu(hdr->type));
950 break;
951 }
952
953 return 0;
954 }
955
956 /* returns zero if skb can be reused */
p54_rx(struct ieee80211_hw * dev,struct sk_buff * skb)957 int p54_rx(struct ieee80211_hw *dev, struct sk_buff *skb)
958 {
959 u16 type = le16_to_cpu(*((__le16 *)skb->data));
960
961 if (type & P54_HDR_FLAG_CONTROL)
962 return p54_rx_control(dev, skb);
963 else
964 return p54_rx_data(dev, skb);
965 }
966 EXPORT_SYMBOL_GPL(p54_rx);
967
968 /*
969 * So, the firmware is somewhat stupid and doesn't know what places in its
970 * memory incoming data should go to. By poking around in the firmware, we
971 * can find some unused memory to upload our packets to. However, data that we
972 * want the card to TX needs to stay intact until the card has told us that
973 * it is done with it. This function finds empty places we can upload to and
974 * marks allocated areas as reserved if necessary. p54_rx_frame_sent frees
975 * allocated areas.
976 */
p54_assign_address(struct ieee80211_hw * dev,struct sk_buff * skb,struct p54_hdr * data,u32 len)977 static int p54_assign_address(struct ieee80211_hw *dev, struct sk_buff *skb,
978 struct p54_hdr *data, u32 len)
979 {
980 struct p54_common *priv = dev->priv;
981 struct sk_buff *entry;
982 struct sk_buff *target_skb = NULL;
983 struct ieee80211_tx_info *info;
984 struct memrecord *range;
985 u32 last_addr = priv->rx_start;
986 u32 largest_hole = 0;
987 u32 target_addr = priv->rx_start;
988 unsigned long flags;
989 unsigned int left;
990 len = (len + priv->headroom + priv->tailroom + 3) & ~0x3;
991
992 if (!skb)
993 return -EINVAL;
994
995 spin_lock_irqsave(&priv->tx_queue.lock, flags);
996
997 left = skb_queue_len(&priv->tx_queue);
998 if (unlikely(left >= 28)) {
999 /*
1000 * The tx_queue is nearly full!
1001 * We have throttle normal data traffic, because we must
1002 * have a few spare slots for control frames left.
1003 */
1004 ieee80211_stop_queues(dev);
1005 queue_delayed_work(dev->workqueue, &priv->work,
1006 msecs_to_jiffies(P54_TX_TIMEOUT));
1007
1008 if (unlikely(left == 32)) {
1009 /*
1010 * The tx_queue is now really full.
1011 *
1012 * TODO: check if the device has crashed and reset it.
1013 */
1014 spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
1015 return -ENOSPC;
1016 }
1017 }
1018
1019 entry = priv->tx_queue.next;
1020 while (left--) {
1021 u32 hole_size;
1022 info = IEEE80211_SKB_CB(entry);
1023 range = (void *)info->rate_driver_data;
1024 hole_size = range->start_addr - last_addr;
1025 if (!target_skb && hole_size >= len) {
1026 target_skb = entry->prev;
1027 hole_size -= len;
1028 target_addr = last_addr;
1029 }
1030 largest_hole = max(largest_hole, hole_size);
1031 last_addr = range->end_addr;
1032 entry = entry->next;
1033 }
1034 if (!target_skb && priv->rx_end - last_addr >= len) {
1035 target_skb = priv->tx_queue.prev;
1036 largest_hole = max(largest_hole, priv->rx_end - last_addr - len);
1037 if (!skb_queue_empty(&priv->tx_queue)) {
1038 info = IEEE80211_SKB_CB(target_skb);
1039 range = (void *)info->rate_driver_data;
1040 target_addr = range->end_addr;
1041 }
1042 } else
1043 largest_hole = max(largest_hole, priv->rx_end - last_addr);
1044
1045 if (!target_skb) {
1046 spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
1047 ieee80211_stop_queues(dev);
1048 return -ENOSPC;
1049 }
1050
1051 info = IEEE80211_SKB_CB(skb);
1052 range = (void *)info->rate_driver_data;
1053 range->start_addr = target_addr;
1054 range->end_addr = target_addr + len;
1055 __skb_queue_after(&priv->tx_queue, target_skb, skb);
1056 spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
1057
1058 if (largest_hole < priv->headroom + sizeof(struct p54_hdr) +
1059 48 + IEEE80211_MAX_RTS_THRESHOLD + priv->tailroom)
1060 ieee80211_stop_queues(dev);
1061
1062 data->req_id = cpu_to_le32(target_addr + priv->headroom);
1063 return 0;
1064 }
1065
p54_alloc_skb(struct ieee80211_hw * dev,u16 hdr_flags,u16 len,u16 type,gfp_t memflags)1066 static struct sk_buff *p54_alloc_skb(struct ieee80211_hw *dev,
1067 u16 hdr_flags, u16 len, u16 type, gfp_t memflags)
1068 {
1069 struct p54_common *priv = dev->priv;
1070 struct p54_hdr *hdr;
1071 struct sk_buff *skb;
1072
1073 skb = __dev_alloc_skb(len + priv->tx_hdr_len, memflags);
1074 if (!skb)
1075 return NULL;
1076 skb_reserve(skb, priv->tx_hdr_len);
1077
1078 hdr = (struct p54_hdr *) skb_put(skb, sizeof(*hdr));
1079 hdr->flags = cpu_to_le16(hdr_flags);
1080 hdr->len = cpu_to_le16(len - sizeof(*hdr));
1081 hdr->type = cpu_to_le16(type);
1082 hdr->tries = hdr->rts_tries = 0;
1083
1084 if (unlikely(p54_assign_address(dev, skb, hdr, len))) {
1085 kfree_skb(skb);
1086 return NULL;
1087 }
1088 return skb;
1089 }
1090
p54_read_eeprom(struct ieee80211_hw * dev)1091 int p54_read_eeprom(struct ieee80211_hw *dev)
1092 {
1093 struct p54_common *priv = dev->priv;
1094 struct p54_hdr *hdr = NULL;
1095 struct p54_eeprom_lm86 *eeprom_hdr;
1096 struct sk_buff *skb;
1097 size_t eeprom_size = 0x2020, offset = 0, blocksize, maxblocksize;
1098 int ret = -ENOMEM;
1099 void *eeprom = NULL;
1100
1101 maxblocksize = EEPROM_READBACK_LEN;
1102 if (priv->fw_var >= 0x509)
1103 maxblocksize -= 0xc;
1104 else
1105 maxblocksize -= 0x4;
1106
1107 skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL, sizeof(*hdr) +
1108 sizeof(*eeprom_hdr) + maxblocksize,
1109 P54_CONTROL_TYPE_EEPROM_READBACK, GFP_KERNEL);
1110 if (!skb)
1111 goto free;
1112 priv->eeprom = kzalloc(EEPROM_READBACK_LEN, GFP_KERNEL);
1113 if (!priv->eeprom)
1114 goto free;
1115 eeprom = kzalloc(eeprom_size, GFP_KERNEL);
1116 if (!eeprom)
1117 goto free;
1118
1119 eeprom_hdr = (struct p54_eeprom_lm86 *) skb_put(skb,
1120 sizeof(*eeprom_hdr) + maxblocksize);
1121
1122 while (eeprom_size) {
1123 blocksize = min(eeprom_size, maxblocksize);
1124 if (priv->fw_var < 0x509) {
1125 eeprom_hdr->v1.offset = cpu_to_le16(offset);
1126 eeprom_hdr->v1.len = cpu_to_le16(blocksize);
1127 } else {
1128 eeprom_hdr->v2.offset = cpu_to_le32(offset);
1129 eeprom_hdr->v2.len = cpu_to_le16(blocksize);
1130 eeprom_hdr->v2.magic2 = 0xf;
1131 memcpy(eeprom_hdr->v2.magic, (const char *)"LOCK", 4);
1132 }
1133 priv->tx(dev, skb);
1134
1135 if (!wait_for_completion_interruptible_timeout(&priv->eeprom_comp, HZ)) {
1136 printk(KERN_ERR "%s: device does not respond!\n",
1137 wiphy_name(dev->wiphy));
1138 ret = -EBUSY;
1139 goto free;
1140 }
1141
1142 memcpy(eeprom + offset, priv->eeprom, blocksize);
1143 offset += blocksize;
1144 eeprom_size -= blocksize;
1145 }
1146
1147 ret = p54_parse_eeprom(dev, eeprom, offset);
1148 free:
1149 kfree(priv->eeprom);
1150 priv->eeprom = NULL;
1151 p54_free_skb(dev, skb);
1152 kfree(eeprom);
1153
1154 return ret;
1155 }
1156 EXPORT_SYMBOL_GPL(p54_read_eeprom);
1157
p54_set_tim(struct ieee80211_hw * dev,struct ieee80211_sta * sta,bool set)1158 static int p54_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta,
1159 bool set)
1160 {
1161 struct p54_common *priv = dev->priv;
1162 struct sk_buff *skb;
1163 struct p54_tim *tim;
1164
1165 skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET,
1166 sizeof(struct p54_hdr) + sizeof(*tim),
1167 P54_CONTROL_TYPE_TIM, GFP_ATOMIC);
1168 if (!skb)
1169 return -ENOMEM;
1170
1171 tim = (struct p54_tim *) skb_put(skb, sizeof(*tim));
1172 tim->count = 1;
1173 tim->entry[0] = cpu_to_le16(set ? (sta->aid | 0x8000) : sta->aid);
1174 priv->tx(dev, skb);
1175 return 0;
1176 }
1177
p54_sta_unlock(struct ieee80211_hw * dev,u8 * addr)1178 static int p54_sta_unlock(struct ieee80211_hw *dev, u8 *addr)
1179 {
1180 struct p54_common *priv = dev->priv;
1181 struct sk_buff *skb;
1182 struct p54_sta_unlock *sta;
1183
1184 skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET,
1185 sizeof(struct p54_hdr) + sizeof(*sta),
1186 P54_CONTROL_TYPE_PSM_STA_UNLOCK, GFP_ATOMIC);
1187 if (!skb)
1188 return -ENOMEM;
1189
1190 sta = (struct p54_sta_unlock *)skb_put(skb, sizeof(*sta));
1191 memcpy(sta->addr, addr, ETH_ALEN);
1192 priv->tx(dev, skb);
1193 return 0;
1194 }
1195
p54_sta_notify(struct ieee80211_hw * dev,struct ieee80211_vif * vif,enum sta_notify_cmd notify_cmd,struct ieee80211_sta * sta)1196 static void p54_sta_notify(struct ieee80211_hw *dev, struct ieee80211_vif *vif,
1197 enum sta_notify_cmd notify_cmd,
1198 struct ieee80211_sta *sta)
1199 {
1200 switch (notify_cmd) {
1201 case STA_NOTIFY_ADD:
1202 case STA_NOTIFY_REMOVE:
1203 /*
1204 * Notify the firmware that we don't want or we don't
1205 * need to buffer frames for this station anymore.
1206 */
1207
1208 p54_sta_unlock(dev, sta->addr);
1209 break;
1210 case STA_NOTIFY_AWAKE:
1211 /* update the firmware's filter table */
1212 p54_sta_unlock(dev, sta->addr);
1213 break;
1214 default:
1215 break;
1216 }
1217 }
1218
p54_tx_cancel(struct ieee80211_hw * dev,struct sk_buff * entry)1219 static int p54_tx_cancel(struct ieee80211_hw *dev, struct sk_buff *entry)
1220 {
1221 struct p54_common *priv = dev->priv;
1222 struct sk_buff *skb;
1223 struct p54_hdr *hdr;
1224 struct p54_txcancel *cancel;
1225
1226 skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET,
1227 sizeof(struct p54_hdr) + sizeof(*cancel),
1228 P54_CONTROL_TYPE_TXCANCEL, GFP_ATOMIC);
1229 if (!skb)
1230 return -ENOMEM;
1231
1232 hdr = (void *)entry->data;
1233 cancel = (struct p54_txcancel *)skb_put(skb, sizeof(*cancel));
1234 cancel->req_id = hdr->req_id;
1235 priv->tx(dev, skb);
1236 return 0;
1237 }
1238
p54_tx_fill(struct ieee80211_hw * dev,struct sk_buff * skb,struct ieee80211_tx_info * info,u8 * queue,size_t * extra_len,u16 * flags,u16 * aid)1239 static int p54_tx_fill(struct ieee80211_hw *dev, struct sk_buff *skb,
1240 struct ieee80211_tx_info *info, u8 *queue, size_t *extra_len,
1241 u16 *flags, u16 *aid)
1242 {
1243 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1244 struct p54_common *priv = dev->priv;
1245 int ret = 0;
1246
1247 if (unlikely(ieee80211_is_mgmt(hdr->frame_control))) {
1248 if (ieee80211_is_beacon(hdr->frame_control)) {
1249 *aid = 0;
1250 *queue = 0;
1251 *extra_len = IEEE80211_MAX_TIM_LEN;
1252 *flags = P54_HDR_FLAG_DATA_OUT_TIMESTAMP;
1253 return 0;
1254 } else if (ieee80211_is_probe_resp(hdr->frame_control)) {
1255 *aid = 0;
1256 *queue = 2;
1257 *flags = P54_HDR_FLAG_DATA_OUT_TIMESTAMP |
1258 P54_HDR_FLAG_DATA_OUT_NOCANCEL;
1259 return 0;
1260 } else {
1261 *queue = 2;
1262 ret = 0;
1263 }
1264 } else {
1265 *queue += 4;
1266 ret = 1;
1267 }
1268
1269 switch (priv->mode) {
1270 case NL80211_IFTYPE_STATION:
1271 *aid = 1;
1272 break;
1273 case NL80211_IFTYPE_AP:
1274 case NL80211_IFTYPE_ADHOC:
1275 case NL80211_IFTYPE_MESH_POINT:
1276 if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
1277 *aid = 0;
1278 *queue = 3;
1279 return 0;
1280 }
1281 if (info->control.sta)
1282 *aid = info->control.sta->aid;
1283 else
1284 *flags |= P54_HDR_FLAG_DATA_OUT_NOCANCEL;
1285 }
1286 return ret;
1287 }
1288
p54_convert_algo(enum ieee80211_key_alg alg)1289 static u8 p54_convert_algo(enum ieee80211_key_alg alg)
1290 {
1291 switch (alg) {
1292 case ALG_WEP:
1293 return P54_CRYPTO_WEP;
1294 case ALG_TKIP:
1295 return P54_CRYPTO_TKIPMICHAEL;
1296 case ALG_CCMP:
1297 return P54_CRYPTO_AESCCMP;
1298 default:
1299 return 0;
1300 }
1301 }
1302
p54_tx(struct ieee80211_hw * dev,struct sk_buff * skb)1303 static int p54_tx(struct ieee80211_hw *dev, struct sk_buff *skb)
1304 {
1305 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1306 struct ieee80211_tx_queue_stats *current_queue = NULL;
1307 struct p54_common *priv = dev->priv;
1308 struct p54_hdr *hdr;
1309 struct p54_tx_data *txhdr;
1310 size_t padding, len, tim_len = 0;
1311 int i, j, ridx, ret;
1312 u16 hdr_flags = 0, aid = 0;
1313 u8 rate, queue, crypt_offset = 0;
1314 u8 cts_rate = 0x20;
1315 u8 rc_flags;
1316 u8 calculated_tries[4];
1317 u8 nrates = 0, nremaining = 8;
1318
1319 queue = skb_get_queue_mapping(skb);
1320
1321 ret = p54_tx_fill(dev, skb, info, &queue, &tim_len, &hdr_flags, &aid);
1322 current_queue = &priv->tx_stats[queue];
1323 if (unlikely((current_queue->len > current_queue->limit) && ret))
1324 return NETDEV_TX_BUSY;
1325 current_queue->len++;
1326 current_queue->count++;
1327 if ((current_queue->len == current_queue->limit) && ret)
1328 ieee80211_stop_queue(dev, skb_get_queue_mapping(skb));
1329
1330 padding = (unsigned long)(skb->data - (sizeof(*hdr) + sizeof(*txhdr))) & 3;
1331 len = skb->len;
1332
1333 if (info->control.hw_key) {
1334 crypt_offset = ieee80211_get_hdrlen_from_skb(skb);
1335 if (info->control.hw_key->alg == ALG_TKIP) {
1336 u8 *iv = (u8 *)(skb->data + crypt_offset);
1337 /*
1338 * The firmware excepts that the IV has to have
1339 * this special format
1340 */
1341 iv[1] = iv[0];
1342 iv[0] = iv[2];
1343 iv[2] = 0;
1344 }
1345 }
1346
1347 txhdr = (struct p54_tx_data *) skb_push(skb, sizeof(*txhdr) + padding);
1348 hdr = (struct p54_hdr *) skb_push(skb, sizeof(*hdr));
1349
1350 if (padding)
1351 hdr_flags |= P54_HDR_FLAG_DATA_ALIGN;
1352 hdr->type = cpu_to_le16(aid);
1353 hdr->rts_tries = info->control.rates[0].count;
1354
1355 /*
1356 * we register the rates in perfect order, and
1357 * RTS/CTS won't happen on 5 GHz
1358 */
1359 cts_rate = info->control.rts_cts_rate_idx;
1360
1361 memset(&txhdr->rateset, 0, sizeof(txhdr->rateset));
1362
1363 /* see how many rates got used */
1364 for (i = 0; i < 4; i++) {
1365 if (info->control.rates[i].idx < 0)
1366 break;
1367 nrates++;
1368 }
1369
1370 /* limit tries to 8/nrates per rate */
1371 for (i = 0; i < nrates; i++) {
1372 /*
1373 * The magic expression here is equivalent to 8/nrates for
1374 * all values that matter, but avoids division and jumps.
1375 * Note that nrates can only take the values 1 through 4.
1376 */
1377 calculated_tries[i] = min_t(int, ((15 >> nrates) | 1) + 1,
1378 info->control.rates[i].count);
1379 nremaining -= calculated_tries[i];
1380 }
1381
1382 /* if there are tries left, distribute from back to front */
1383 for (i = nrates - 1; nremaining > 0 && i >= 0; i--) {
1384 int tmp = info->control.rates[i].count - calculated_tries[i];
1385
1386 if (tmp <= 0)
1387 continue;
1388 /* RC requested more tries at this rate */
1389
1390 tmp = min_t(int, tmp, nremaining);
1391 calculated_tries[i] += tmp;
1392 nremaining -= tmp;
1393 }
1394
1395 ridx = 0;
1396 for (i = 0; i < nrates && ridx < 8; i++) {
1397 /* we register the rates in perfect order */
1398 rate = info->control.rates[i].idx;
1399 if (info->band == IEEE80211_BAND_5GHZ)
1400 rate += 4;
1401
1402 /* store the count we actually calculated for TX status */
1403 info->control.rates[i].count = calculated_tries[i];
1404
1405 rc_flags = info->control.rates[i].flags;
1406 if (rc_flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) {
1407 rate |= 0x10;
1408 cts_rate |= 0x10;
1409 }
1410 if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS)
1411 rate |= 0x40;
1412 else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
1413 rate |= 0x20;
1414 for (j = 0; j < calculated_tries[i] && ridx < 8; j++) {
1415 txhdr->rateset[ridx] = rate;
1416 ridx++;
1417 }
1418 }
1419
1420 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
1421 hdr_flags |= P54_HDR_FLAG_DATA_OUT_SEQNR;
1422
1423 /* TODO: enable bursting */
1424 hdr->flags = cpu_to_le16(hdr_flags);
1425 hdr->tries = ridx;
1426 txhdr->rts_rate_idx = 0;
1427 if (info->control.hw_key) {
1428 txhdr->key_type = p54_convert_algo(info->control.hw_key->alg);
1429 txhdr->key_len = min((u8)16, info->control.hw_key->keylen);
1430 memcpy(txhdr->key, info->control.hw_key->key, txhdr->key_len);
1431 if (info->control.hw_key->alg == ALG_TKIP) {
1432 if (unlikely(skb_tailroom(skb) < 12))
1433 goto err;
1434 /* reserve space for the MIC key */
1435 len += 8;
1436 memcpy(skb_put(skb, 8), &(info->control.hw_key->key
1437 [NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY]), 8);
1438 }
1439 /* reserve some space for ICV */
1440 len += info->control.hw_key->icv_len;
1441 memset(skb_put(skb, info->control.hw_key->icv_len), 0,
1442 info->control.hw_key->icv_len);
1443 } else {
1444 txhdr->key_type = 0;
1445 txhdr->key_len = 0;
1446 }
1447 txhdr->crypt_offset = crypt_offset;
1448 txhdr->hw_queue = queue;
1449 if (current_queue)
1450 txhdr->backlog = current_queue->len;
1451 else
1452 txhdr->backlog = 0;
1453 memset(txhdr->durations, 0, sizeof(txhdr->durations));
1454 txhdr->tx_antenna = (info->antenna_sel_tx == 0) ?
1455 2 : info->antenna_sel_tx - 1;
1456 txhdr->output_power = priv->output_power;
1457 txhdr->cts_rate = cts_rate;
1458 if (padding)
1459 txhdr->align[0] = padding;
1460
1461 hdr->len = cpu_to_le16(len);
1462 /* modifies skb->cb and with it info, so must be last! */
1463 if (unlikely(p54_assign_address(dev, skb, hdr, skb->len + tim_len)))
1464 goto err;
1465 priv->tx(dev, skb);
1466
1467 queue_delayed_work(dev->workqueue, &priv->work,
1468 msecs_to_jiffies(P54_TX_FRAME_LIFETIME));
1469
1470 return 0;
1471
1472 err:
1473 skb_pull(skb, sizeof(*hdr) + sizeof(*txhdr) + padding);
1474 if (current_queue) {
1475 current_queue->len--;
1476 current_queue->count--;
1477 }
1478 return NETDEV_TX_BUSY;
1479 }
1480
p54_setup_mac(struct ieee80211_hw * dev)1481 static int p54_setup_mac(struct ieee80211_hw *dev)
1482 {
1483 struct p54_common *priv = dev->priv;
1484 struct sk_buff *skb;
1485 struct p54_setup_mac *setup;
1486 u16 mode;
1487
1488 skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*setup) +
1489 sizeof(struct p54_hdr), P54_CONTROL_TYPE_SETUP,
1490 GFP_ATOMIC);
1491 if (!skb)
1492 return -ENOMEM;
1493
1494 setup = (struct p54_setup_mac *) skb_put(skb, sizeof(*setup));
1495 if (dev->conf.radio_enabled) {
1496 switch (priv->mode) {
1497 case NL80211_IFTYPE_STATION:
1498 mode = P54_FILTER_TYPE_STATION;
1499 break;
1500 case NL80211_IFTYPE_AP:
1501 mode = P54_FILTER_TYPE_AP;
1502 break;
1503 case NL80211_IFTYPE_ADHOC:
1504 case NL80211_IFTYPE_MESH_POINT:
1505 mode = P54_FILTER_TYPE_IBSS;
1506 break;
1507 default:
1508 mode = P54_FILTER_TYPE_NONE;
1509 break;
1510 }
1511 if (priv->filter_flags & FIF_PROMISC_IN_BSS)
1512 mode |= P54_FILTER_TYPE_TRANSPARENT;
1513 } else
1514 mode = P54_FILTER_TYPE_RX_DISABLED;
1515
1516 setup->mac_mode = cpu_to_le16(mode);
1517 memcpy(setup->mac_addr, priv->mac_addr, ETH_ALEN);
1518 memcpy(setup->bssid, priv->bssid, ETH_ALEN);
1519 setup->rx_antenna = 2; /* automatic */
1520 setup->rx_align = 0;
1521 if (priv->fw_var < 0x500) {
1522 setup->v1.basic_rate_mask = cpu_to_le32(priv->basic_rate_mask);
1523 memset(setup->v1.rts_rates, 0, 8);
1524 setup->v1.rx_addr = cpu_to_le32(priv->rx_end);
1525 setup->v1.max_rx = cpu_to_le16(priv->rx_mtu);
1526 setup->v1.rxhw = cpu_to_le16(priv->rxhw);
1527 setup->v1.wakeup_timer = cpu_to_le16(priv->wakeup_timer);
1528 setup->v1.unalloc0 = cpu_to_le16(0);
1529 } else {
1530 setup->v2.rx_addr = cpu_to_le32(priv->rx_end);
1531 setup->v2.max_rx = cpu_to_le16(priv->rx_mtu);
1532 setup->v2.rxhw = cpu_to_le16(priv->rxhw);
1533 setup->v2.timer = cpu_to_le16(priv->wakeup_timer);
1534 setup->v2.truncate = cpu_to_le16(48896);
1535 setup->v2.basic_rate_mask = cpu_to_le32(priv->basic_rate_mask);
1536 setup->v2.sbss_offset = 0;
1537 setup->v2.mcast_window = 0;
1538 setup->v2.rx_rssi_threshold = 0;
1539 setup->v2.rx_ed_threshold = 0;
1540 setup->v2.ref_clock = cpu_to_le32(644245094);
1541 setup->v2.lpf_bandwidth = cpu_to_le16(65535);
1542 setup->v2.osc_start_delay = cpu_to_le16(65535);
1543 }
1544 priv->tx(dev, skb);
1545 return 0;
1546 }
1547
p54_scan(struct ieee80211_hw * dev,u16 mode,u16 dwell)1548 static int p54_scan(struct ieee80211_hw *dev, u16 mode, u16 dwell)
1549 {
1550 struct p54_common *priv = dev->priv;
1551 struct sk_buff *skb;
1552 struct p54_scan *chan;
1553 unsigned int i;
1554 void *entry;
1555 __le16 freq = cpu_to_le16(dev->conf.channel->center_freq);
1556 int band = dev->conf.channel->band;
1557
1558 skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*chan) +
1559 sizeof(struct p54_hdr), P54_CONTROL_TYPE_SCAN,
1560 GFP_ATOMIC);
1561 if (!skb)
1562 return -ENOMEM;
1563
1564 chan = (struct p54_scan *) skb_put(skb, sizeof(*chan));
1565 memset(chan->padding1, 0, sizeof(chan->padding1));
1566 chan->mode = cpu_to_le16(mode);
1567 chan->dwell = cpu_to_le16(dwell);
1568
1569 for (i = 0; i < priv->iq_autocal_len; i++) {
1570 if (priv->iq_autocal[i].freq != freq)
1571 continue;
1572
1573 memcpy(&chan->iq_autocal, &priv->iq_autocal[i],
1574 sizeof(*priv->iq_autocal));
1575 break;
1576 }
1577 if (i == priv->iq_autocal_len)
1578 goto err;
1579
1580 for (i = 0; i < priv->output_limit_len; i++) {
1581 if (priv->output_limit[i].freq != freq)
1582 continue;
1583
1584 chan->val_barker = 0x38;
1585 chan->val_bpsk = chan->dup_bpsk =
1586 priv->output_limit[i].val_bpsk;
1587 chan->val_qpsk = chan->dup_qpsk =
1588 priv->output_limit[i].val_qpsk;
1589 chan->val_16qam = chan->dup_16qam =
1590 priv->output_limit[i].val_16qam;
1591 chan->val_64qam = chan->dup_64qam =
1592 priv->output_limit[i].val_64qam;
1593 break;
1594 }
1595 if (i == priv->output_limit_len)
1596 goto err;
1597
1598 entry = priv->curve_data->data;
1599 for (i = 0; i < priv->curve_data->channels; i++) {
1600 if (*((__le16 *)entry) != freq) {
1601 entry += sizeof(__le16);
1602 entry += sizeof(struct p54_pa_curve_data_sample) *
1603 priv->curve_data->points_per_channel;
1604 continue;
1605 }
1606
1607 entry += sizeof(__le16);
1608 chan->pa_points_per_curve = 8;
1609 memset(chan->curve_data, 0, sizeof(*chan->curve_data));
1610 memcpy(chan->curve_data, entry,
1611 sizeof(struct p54_pa_curve_data_sample) *
1612 min((u8)8, priv->curve_data->points_per_channel));
1613 break;
1614 }
1615
1616 if (priv->fw_var < 0x500) {
1617 chan->v1_rssi.mul = cpu_to_le16(priv->rssical_db[band].mul);
1618 chan->v1_rssi.add = cpu_to_le16(priv->rssical_db[band].add);
1619 } else {
1620 chan->v2.rssi.mul = cpu_to_le16(priv->rssical_db[band].mul);
1621 chan->v2.rssi.add = cpu_to_le16(priv->rssical_db[band].add);
1622 chan->v2.basic_rate_mask = cpu_to_le32(priv->basic_rate_mask);
1623 memset(chan->v2.rts_rates, 0, 8);
1624 }
1625 priv->tx(dev, skb);
1626 return 0;
1627
1628 err:
1629 printk(KERN_ERR "%s: frequency change failed\n", wiphy_name(dev->wiphy));
1630 p54_free_skb(dev, skb);
1631 return -EINVAL;
1632 }
1633
p54_set_leds(struct ieee80211_hw * dev,int mode,int link,int act)1634 static int p54_set_leds(struct ieee80211_hw *dev, int mode, int link, int act)
1635 {
1636 struct p54_common *priv = dev->priv;
1637 struct sk_buff *skb;
1638 struct p54_led *led;
1639
1640 skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*led) +
1641 sizeof(struct p54_hdr), P54_CONTROL_TYPE_LED,
1642 GFP_ATOMIC);
1643 if (!skb)
1644 return -ENOMEM;
1645
1646 led = (struct p54_led *)skb_put(skb, sizeof(*led));
1647 led->mode = cpu_to_le16(mode);
1648 led->led_permanent = cpu_to_le16(link);
1649 led->led_temporary = cpu_to_le16(act);
1650 led->duration = cpu_to_le16(1000);
1651 priv->tx(dev, skb);
1652 return 0;
1653 }
1654
1655 #define P54_SET_QUEUE(queue, ai_fs, cw_min, cw_max, _txop) \
1656 do { \
1657 queue.aifs = cpu_to_le16(ai_fs); \
1658 queue.cwmin = cpu_to_le16(cw_min); \
1659 queue.cwmax = cpu_to_le16(cw_max); \
1660 queue.txop = cpu_to_le16(_txop); \
1661 } while(0)
1662
p54_set_edcf(struct ieee80211_hw * dev)1663 static int p54_set_edcf(struct ieee80211_hw *dev)
1664 {
1665 struct p54_common *priv = dev->priv;
1666 struct sk_buff *skb;
1667 struct p54_edcf *edcf;
1668
1669 skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*edcf) +
1670 sizeof(struct p54_hdr), P54_CONTROL_TYPE_DCFINIT,
1671 GFP_ATOMIC);
1672 if (!skb)
1673 return -ENOMEM;
1674
1675 edcf = (struct p54_edcf *)skb_put(skb, sizeof(*edcf));
1676 if (priv->use_short_slot) {
1677 edcf->slottime = 9;
1678 edcf->sifs = 0x10;
1679 edcf->eofpad = 0x00;
1680 } else {
1681 edcf->slottime = 20;
1682 edcf->sifs = 0x0a;
1683 edcf->eofpad = 0x06;
1684 }
1685 /* (see prism54/isl_oid.h for further details) */
1686 edcf->frameburst = cpu_to_le16(0);
1687 edcf->round_trip_delay = cpu_to_le16(0);
1688 edcf->flags = 0;
1689 memset(edcf->mapping, 0, sizeof(edcf->mapping));
1690 memcpy(edcf->queue, priv->qos_params, sizeof(edcf->queue));
1691 priv->tx(dev, skb);
1692 return 0;
1693 }
1694
p54_beacon_tim(struct sk_buff * skb)1695 static int p54_beacon_tim(struct sk_buff *skb)
1696 {
1697 /*
1698 * the good excuse for this mess is ... the firmware.
1699 * The dummy TIM MUST be at the end of the beacon frame,
1700 * because it'll be overwritten!
1701 */
1702
1703 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1704 u8 *pos, *end;
1705
1706 if (skb->len <= sizeof(mgmt))
1707 return -EINVAL;
1708
1709 pos = (u8 *)mgmt->u.beacon.variable;
1710 end = skb->data + skb->len;
1711 while (pos < end) {
1712 if (pos + 2 + pos[1] > end)
1713 return -EINVAL;
1714
1715 if (pos[0] == WLAN_EID_TIM) {
1716 u8 dtim_len = pos[1];
1717 u8 dtim_period = pos[3];
1718 u8 *next = pos + 2 + dtim_len;
1719
1720 if (dtim_len < 3)
1721 return -EINVAL;
1722
1723 memmove(pos, next, end - next);
1724
1725 if (dtim_len > 3)
1726 skb_trim(skb, skb->len - (dtim_len - 3));
1727
1728 pos = end - (dtim_len + 2);
1729
1730 /* add the dummy at the end */
1731 pos[0] = WLAN_EID_TIM;
1732 pos[1] = 3;
1733 pos[2] = 0;
1734 pos[3] = dtim_period;
1735 pos[4] = 0;
1736 return 0;
1737 }
1738 pos += 2 + pos[1];
1739 }
1740 return 0;
1741 }
1742
p54_beacon_update(struct ieee80211_hw * dev,struct ieee80211_vif * vif)1743 static int p54_beacon_update(struct ieee80211_hw *dev,
1744 struct ieee80211_vif *vif)
1745 {
1746 struct p54_common *priv = dev->priv;
1747 struct sk_buff *beacon;
1748 int ret;
1749
1750 if (priv->cached_beacon) {
1751 p54_tx_cancel(dev, priv->cached_beacon);
1752 /* wait for the last beacon the be freed */
1753 msleep(10);
1754 }
1755
1756 beacon = ieee80211_beacon_get(dev, vif);
1757 if (!beacon)
1758 return -ENOMEM;
1759 ret = p54_beacon_tim(beacon);
1760 if (ret)
1761 return ret;
1762 ret = p54_tx(dev, beacon);
1763 if (ret)
1764 return ret;
1765 priv->cached_beacon = beacon;
1766 priv->tsf_high32 = 0;
1767 priv->tsf_low32 = 0;
1768
1769 return 0;
1770 }
1771
p54_start(struct ieee80211_hw * dev)1772 static int p54_start(struct ieee80211_hw *dev)
1773 {
1774 struct p54_common *priv = dev->priv;
1775 int err;
1776
1777 mutex_lock(&priv->conf_mutex);
1778 err = priv->open(dev);
1779 if (err)
1780 goto out;
1781 P54_SET_QUEUE(priv->qos_params[0], 0x0002, 0x0003, 0x0007, 47);
1782 P54_SET_QUEUE(priv->qos_params[1], 0x0002, 0x0007, 0x000f, 94);
1783 P54_SET_QUEUE(priv->qos_params[2], 0x0003, 0x000f, 0x03ff, 0);
1784 P54_SET_QUEUE(priv->qos_params[3], 0x0007, 0x000f, 0x03ff, 0);
1785 err = p54_set_edcf(dev);
1786 if (err)
1787 goto out;
1788
1789 memset(priv->bssid, ~0, ETH_ALEN);
1790 priv->mode = NL80211_IFTYPE_MONITOR;
1791 err = p54_setup_mac(dev);
1792 if (err) {
1793 priv->mode = NL80211_IFTYPE_UNSPECIFIED;
1794 goto out;
1795 }
1796
1797 queue_delayed_work(dev->workqueue, &priv->work, 0);
1798
1799 out:
1800 mutex_unlock(&priv->conf_mutex);
1801 return err;
1802 }
1803
p54_stop(struct ieee80211_hw * dev)1804 static void p54_stop(struct ieee80211_hw *dev)
1805 {
1806 struct p54_common *priv = dev->priv;
1807 struct sk_buff *skb;
1808
1809 mutex_lock(&priv->conf_mutex);
1810 priv->mode = NL80211_IFTYPE_UNSPECIFIED;
1811 cancel_delayed_work_sync(&priv->work);
1812 if (priv->cached_beacon)
1813 p54_tx_cancel(dev, priv->cached_beacon);
1814
1815 priv->stop(dev);
1816 while ((skb = skb_dequeue(&priv->tx_queue)))
1817 kfree_skb(skb);
1818 priv->cached_beacon = NULL;
1819 priv->tsf_high32 = priv->tsf_low32 = 0;
1820 mutex_unlock(&priv->conf_mutex);
1821 }
1822
p54_add_interface(struct ieee80211_hw * dev,struct ieee80211_if_init_conf * conf)1823 static int p54_add_interface(struct ieee80211_hw *dev,
1824 struct ieee80211_if_init_conf *conf)
1825 {
1826 struct p54_common *priv = dev->priv;
1827
1828 mutex_lock(&priv->conf_mutex);
1829 if (priv->mode != NL80211_IFTYPE_MONITOR) {
1830 mutex_unlock(&priv->conf_mutex);
1831 return -EOPNOTSUPP;
1832 }
1833
1834 switch (conf->type) {
1835 case NL80211_IFTYPE_STATION:
1836 case NL80211_IFTYPE_ADHOC:
1837 case NL80211_IFTYPE_AP:
1838 case NL80211_IFTYPE_MESH_POINT:
1839 priv->mode = conf->type;
1840 break;
1841 default:
1842 mutex_unlock(&priv->conf_mutex);
1843 return -EOPNOTSUPP;
1844 }
1845
1846 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
1847 p54_setup_mac(dev);
1848 p54_set_leds(dev, 1, 0, 0);
1849 mutex_unlock(&priv->conf_mutex);
1850 return 0;
1851 }
1852
p54_remove_interface(struct ieee80211_hw * dev,struct ieee80211_if_init_conf * conf)1853 static void p54_remove_interface(struct ieee80211_hw *dev,
1854 struct ieee80211_if_init_conf *conf)
1855 {
1856 struct p54_common *priv = dev->priv;
1857
1858 mutex_lock(&priv->conf_mutex);
1859 if (priv->cached_beacon)
1860 p54_tx_cancel(dev, priv->cached_beacon);
1861 priv->mode = NL80211_IFTYPE_MONITOR;
1862 memset(priv->mac_addr, 0, ETH_ALEN);
1863 memset(priv->bssid, 0, ETH_ALEN);
1864 p54_setup_mac(dev);
1865 mutex_unlock(&priv->conf_mutex);
1866 }
1867
p54_config(struct ieee80211_hw * dev,u32 changed)1868 static int p54_config(struct ieee80211_hw *dev, u32 changed)
1869 {
1870 int ret = 0;
1871 struct p54_common *priv = dev->priv;
1872 struct ieee80211_conf *conf = &dev->conf;
1873
1874 mutex_lock(&priv->conf_mutex);
1875 if (changed & IEEE80211_CONF_CHANGE_POWER)
1876 priv->output_power = conf->power_level << 2;
1877 if (changed & IEEE80211_CONF_CHANGE_RADIO_ENABLED) {
1878 ret = p54_setup_mac(dev);
1879 if (ret)
1880 goto out;
1881 }
1882 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1883 ret = p54_scan(dev, P54_SCAN_EXIT, 0);
1884 if (ret)
1885 goto out;
1886 }
1887
1888 out:
1889 mutex_unlock(&priv->conf_mutex);
1890 return ret;
1891 }
1892
p54_config_interface(struct ieee80211_hw * dev,struct ieee80211_vif * vif,struct ieee80211_if_conf * conf)1893 static int p54_config_interface(struct ieee80211_hw *dev,
1894 struct ieee80211_vif *vif,
1895 struct ieee80211_if_conf *conf)
1896 {
1897 struct p54_common *priv = dev->priv;
1898 int ret = 0;
1899
1900 mutex_lock(&priv->conf_mutex);
1901 if (conf->changed & IEEE80211_IFCC_BSSID) {
1902 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
1903 ret = p54_setup_mac(dev);
1904 if (ret)
1905 goto out;
1906 }
1907
1908 if (conf->changed & IEEE80211_IFCC_BEACON) {
1909 ret = p54_scan(dev, P54_SCAN_EXIT, 0);
1910 if (ret)
1911 goto out;
1912 ret = p54_setup_mac(dev);
1913 if (ret)
1914 goto out;
1915 ret = p54_beacon_update(dev, vif);
1916 if (ret)
1917 goto out;
1918 ret = p54_set_edcf(dev);
1919 if (ret)
1920 goto out;
1921 }
1922
1923 ret = p54_set_leds(dev, 1, !is_multicast_ether_addr(priv->bssid), 0);
1924
1925 out:
1926 mutex_unlock(&priv->conf_mutex);
1927 return ret;
1928 }
1929
p54_configure_filter(struct ieee80211_hw * dev,unsigned int changed_flags,unsigned int * total_flags,int mc_count,struct dev_mc_list * mclist)1930 static void p54_configure_filter(struct ieee80211_hw *dev,
1931 unsigned int changed_flags,
1932 unsigned int *total_flags,
1933 int mc_count, struct dev_mc_list *mclist)
1934 {
1935 struct p54_common *priv = dev->priv;
1936
1937 *total_flags &= FIF_PROMISC_IN_BSS |
1938 (*total_flags & FIF_PROMISC_IN_BSS) ?
1939 FIF_FCSFAIL : 0;
1940
1941 priv->filter_flags = *total_flags;
1942
1943 if (changed_flags & FIF_PROMISC_IN_BSS)
1944 p54_setup_mac(dev);
1945 }
1946
p54_conf_tx(struct ieee80211_hw * dev,u16 queue,const struct ieee80211_tx_queue_params * params)1947 static int p54_conf_tx(struct ieee80211_hw *dev, u16 queue,
1948 const struct ieee80211_tx_queue_params *params)
1949 {
1950 struct p54_common *priv = dev->priv;
1951 int ret;
1952
1953 mutex_lock(&priv->conf_mutex);
1954 if ((params) && !(queue > 4)) {
1955 P54_SET_QUEUE(priv->qos_params[queue], params->aifs,
1956 params->cw_min, params->cw_max, params->txop);
1957 ret = p54_set_edcf(dev);
1958 } else
1959 ret = -EINVAL;
1960 mutex_unlock(&priv->conf_mutex);
1961 return ret;
1962 }
1963
p54_init_xbow_synth(struct ieee80211_hw * dev)1964 static int p54_init_xbow_synth(struct ieee80211_hw *dev)
1965 {
1966 struct p54_common *priv = dev->priv;
1967 struct sk_buff *skb;
1968 struct p54_xbow_synth *xbow;
1969
1970 skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*xbow) +
1971 sizeof(struct p54_hdr),
1972 P54_CONTROL_TYPE_XBOW_SYNTH_CFG,
1973 GFP_KERNEL);
1974 if (!skb)
1975 return -ENOMEM;
1976
1977 xbow = (struct p54_xbow_synth *)skb_put(skb, sizeof(*xbow));
1978 xbow->magic1 = cpu_to_le16(0x1);
1979 xbow->magic2 = cpu_to_le16(0x2);
1980 xbow->freq = cpu_to_le16(5390);
1981 memset(xbow->padding, 0, sizeof(xbow->padding));
1982 priv->tx(dev, skb);
1983 return 0;
1984 }
1985
p54_work(struct work_struct * work)1986 static void p54_work(struct work_struct *work)
1987 {
1988 struct p54_common *priv = container_of(work, struct p54_common,
1989 work.work);
1990 struct ieee80211_hw *dev = priv->hw;
1991 struct sk_buff *skb;
1992
1993 if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
1994 return ;
1995
1996 /*
1997 * TODO: walk through tx_queue and do the following tasks
1998 * 1. initiate bursts.
1999 * 2. cancel stuck frames / reset the device if necessary.
2000 */
2001
2002 skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL, sizeof(struct p54_hdr) +
2003 sizeof(struct p54_statistics),
2004 P54_CONTROL_TYPE_STAT_READBACK, GFP_KERNEL);
2005 if (!skb)
2006 return ;
2007
2008 priv->tx(dev, skb);
2009 }
2010
p54_get_stats(struct ieee80211_hw * dev,struct ieee80211_low_level_stats * stats)2011 static int p54_get_stats(struct ieee80211_hw *dev,
2012 struct ieee80211_low_level_stats *stats)
2013 {
2014 struct p54_common *priv = dev->priv;
2015
2016 memcpy(stats, &priv->stats, sizeof(*stats));
2017 return 0;
2018 }
2019
p54_get_tx_stats(struct ieee80211_hw * dev,struct ieee80211_tx_queue_stats * stats)2020 static int p54_get_tx_stats(struct ieee80211_hw *dev,
2021 struct ieee80211_tx_queue_stats *stats)
2022 {
2023 struct p54_common *priv = dev->priv;
2024
2025 memcpy(stats, &priv->tx_stats[4], sizeof(stats[0]) * dev->queues);
2026
2027 return 0;
2028 }
2029
p54_bss_info_changed(struct ieee80211_hw * dev,struct ieee80211_vif * vif,struct ieee80211_bss_conf * info,u32 changed)2030 static void p54_bss_info_changed(struct ieee80211_hw *dev,
2031 struct ieee80211_vif *vif,
2032 struct ieee80211_bss_conf *info,
2033 u32 changed)
2034 {
2035 struct p54_common *priv = dev->priv;
2036
2037 if (changed & BSS_CHANGED_ERP_SLOT) {
2038 priv->use_short_slot = info->use_short_slot;
2039 p54_set_edcf(dev);
2040 }
2041 if (changed & BSS_CHANGED_BASIC_RATES) {
2042 if (dev->conf.channel->band == IEEE80211_BAND_5GHZ)
2043 priv->basic_rate_mask = (info->basic_rates << 4);
2044 else
2045 priv->basic_rate_mask = info->basic_rates;
2046 p54_setup_mac(dev);
2047 if (priv->fw_var >= 0x500)
2048 p54_scan(dev, P54_SCAN_EXIT, 0);
2049 }
2050 if (changed & BSS_CHANGED_ASSOC) {
2051 if (info->assoc) {
2052 priv->aid = info->aid;
2053 priv->wakeup_timer = info->beacon_int *
2054 info->dtim_period * 5;
2055 p54_setup_mac(dev);
2056 }
2057 }
2058
2059 }
2060
p54_set_key(struct ieee80211_hw * dev,enum set_key_cmd cmd,const u8 * local_address,const u8 * address,struct ieee80211_key_conf * key)2061 static int p54_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd,
2062 const u8 *local_address, const u8 *address,
2063 struct ieee80211_key_conf *key)
2064 {
2065 struct p54_common *priv = dev->priv;
2066 struct sk_buff *skb;
2067 struct p54_keycache *rxkey;
2068 u8 algo = 0;
2069
2070 if (modparam_nohwcrypt)
2071 return -EOPNOTSUPP;
2072
2073 if (cmd == DISABLE_KEY)
2074 algo = 0;
2075 else {
2076 switch (key->alg) {
2077 case ALG_TKIP:
2078 if (!(priv->privacy_caps & (BR_DESC_PRIV_CAP_MICHAEL |
2079 BR_DESC_PRIV_CAP_TKIP)))
2080 return -EOPNOTSUPP;
2081 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2082 algo = P54_CRYPTO_TKIPMICHAEL;
2083 break;
2084 case ALG_WEP:
2085 if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_WEP))
2086 return -EOPNOTSUPP;
2087 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2088 algo = P54_CRYPTO_WEP;
2089 break;
2090 case ALG_CCMP:
2091 if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_AESCCMP))
2092 return -EOPNOTSUPP;
2093 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2094 algo = P54_CRYPTO_AESCCMP;
2095 break;
2096 default:
2097 return -EOPNOTSUPP;
2098 }
2099 }
2100
2101 if (key->keyidx > priv->rx_keycache_size) {
2102 /*
2103 * The device supports the choosen algorithm, but the firmware
2104 * does not provide enough key slots to store all of them.
2105 * So, incoming frames have to be decoded by the mac80211 stack,
2106 * but we can still offload encryption for outgoing frames.
2107 */
2108
2109 return 0;
2110 }
2111
2112 mutex_lock(&priv->conf_mutex);
2113 skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*rxkey) +
2114 sizeof(struct p54_hdr), P54_CONTROL_TYPE_RX_KEYCACHE,
2115 GFP_ATOMIC);
2116 if (!skb) {
2117 mutex_unlock(&priv->conf_mutex);
2118 return -ENOMEM;
2119 }
2120
2121 /* TODO: some devices have 4 more free slots for rx keys */
2122 rxkey = (struct p54_keycache *)skb_put(skb, sizeof(*rxkey));
2123 rxkey->entry = key->keyidx;
2124 rxkey->key_id = key->keyidx;
2125 rxkey->key_type = algo;
2126 if (address)
2127 memcpy(rxkey->mac, address, ETH_ALEN);
2128 else
2129 memset(rxkey->mac, ~0, ETH_ALEN);
2130 if (key->alg != ALG_TKIP) {
2131 rxkey->key_len = min((u8)16, key->keylen);
2132 memcpy(rxkey->key, key->key, rxkey->key_len);
2133 } else {
2134 rxkey->key_len = 24;
2135 memcpy(rxkey->key, key->key, 16);
2136 memcpy(&(rxkey->key[16]), &(key->key
2137 [NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY]), 8);
2138 }
2139
2140 priv->tx(dev, skb);
2141 mutex_unlock(&priv->conf_mutex);
2142 return 0;
2143 }
2144
2145 static const struct ieee80211_ops p54_ops = {
2146 .tx = p54_tx,
2147 .start = p54_start,
2148 .stop = p54_stop,
2149 .add_interface = p54_add_interface,
2150 .remove_interface = p54_remove_interface,
2151 .set_tim = p54_set_tim,
2152 .sta_notify = p54_sta_notify,
2153 .set_key = p54_set_key,
2154 .config = p54_config,
2155 .config_interface = p54_config_interface,
2156 .bss_info_changed = p54_bss_info_changed,
2157 .configure_filter = p54_configure_filter,
2158 .conf_tx = p54_conf_tx,
2159 .get_stats = p54_get_stats,
2160 .get_tx_stats = p54_get_tx_stats
2161 };
2162
p54_init_common(size_t priv_data_len)2163 struct ieee80211_hw *p54_init_common(size_t priv_data_len)
2164 {
2165 struct ieee80211_hw *dev;
2166 struct p54_common *priv;
2167
2168 dev = ieee80211_alloc_hw(priv_data_len, &p54_ops);
2169 if (!dev)
2170 return NULL;
2171
2172 priv = dev->priv;
2173 priv->hw = dev;
2174 priv->mode = NL80211_IFTYPE_UNSPECIFIED;
2175 priv->basic_rate_mask = 0x15f;
2176 skb_queue_head_init(&priv->tx_queue);
2177 dev->flags = IEEE80211_HW_RX_INCLUDES_FCS |
2178 IEEE80211_HW_SIGNAL_DBM |
2179 IEEE80211_HW_NOISE_DBM;
2180
2181 dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
2182 BIT(NL80211_IFTYPE_ADHOC) |
2183 BIT(NL80211_IFTYPE_AP) |
2184 BIT(NL80211_IFTYPE_MESH_POINT);
2185
2186 dev->channel_change_time = 1000; /* TODO: find actual value */
2187 priv->tx_stats[0].limit = 1; /* Beacon queue */
2188 priv->tx_stats[1].limit = 1; /* Probe queue for HW scan */
2189 priv->tx_stats[2].limit = 3; /* queue for MLMEs */
2190 priv->tx_stats[3].limit = 3; /* Broadcast / MC queue */
2191 priv->tx_stats[4].limit = 5; /* Data */
2192 dev->queues = 1;
2193 priv->noise = -94;
2194 /*
2195 * We support at most 8 tries no matter which rate they're at,
2196 * we cannot support max_rates * max_rate_tries as we set it
2197 * here, but setting it correctly to 4/2 or so would limit us
2198 * artificially if the RC algorithm wants just two rates, so
2199 * let's say 4/7, we'll redistribute it at TX time, see the
2200 * comments there.
2201 */
2202 dev->max_rates = 4;
2203 dev->max_rate_tries = 7;
2204 dev->extra_tx_headroom = sizeof(struct p54_hdr) + 4 +
2205 sizeof(struct p54_tx_data);
2206
2207 mutex_init(&priv->conf_mutex);
2208 init_completion(&priv->eeprom_comp);
2209 INIT_DELAYED_WORK(&priv->work, p54_work);
2210
2211 return dev;
2212 }
2213 EXPORT_SYMBOL_GPL(p54_init_common);
2214
p54_free_common(struct ieee80211_hw * dev)2215 void p54_free_common(struct ieee80211_hw *dev)
2216 {
2217 struct p54_common *priv = dev->priv;
2218 kfree(priv->iq_autocal);
2219 kfree(priv->output_limit);
2220 kfree(priv->curve_data);
2221 }
2222 EXPORT_SYMBOL_GPL(p54_free_common);
2223
p54_init(void)2224 static int __init p54_init(void)
2225 {
2226 return 0;
2227 }
2228
p54_exit(void)2229 static void __exit p54_exit(void)
2230 {
2231 }
2232
2233 module_init(p54_init);
2234 module_exit(p54_exit);
2235