p54: revamp station power save management in access point mode
[linux-2.6.git] / drivers / net / wireless / p54 / p54common.c
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 MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
29 MODULE_DESCRIPTION("Softmac Prism54 common code");
30 MODULE_LICENSE("GPL");
31 MODULE_ALIAS("prism54common");
32
33 static struct ieee80211_rate p54_bgrates[] = {
34         { .bitrate = 10, .hw_value = 0, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
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_channel p54_bgchannels[] = {
49         { .center_freq = 2412, .hw_value = 1, },
50         { .center_freq = 2417, .hw_value = 2, },
51         { .center_freq = 2422, .hw_value = 3, },
52         { .center_freq = 2427, .hw_value = 4, },
53         { .center_freq = 2432, .hw_value = 5, },
54         { .center_freq = 2437, .hw_value = 6, },
55         { .center_freq = 2442, .hw_value = 7, },
56         { .center_freq = 2447, .hw_value = 8, },
57         { .center_freq = 2452, .hw_value = 9, },
58         { .center_freq = 2457, .hw_value = 10, },
59         { .center_freq = 2462, .hw_value = 11, },
60         { .center_freq = 2467, .hw_value = 12, },
61         { .center_freq = 2472, .hw_value = 13, },
62         { .center_freq = 2484, .hw_value = 14, },
63 };
64
65 static struct ieee80211_supported_band band_2GHz = {
66         .channels = p54_bgchannels,
67         .n_channels = ARRAY_SIZE(p54_bgchannels),
68         .bitrates = p54_bgrates,
69         .n_bitrates = ARRAY_SIZE(p54_bgrates),
70 };
71
72 static struct ieee80211_rate p54_arates[] = {
73         { .bitrate = 60, .hw_value = 4, },
74         { .bitrate = 90, .hw_value = 5, },
75         { .bitrate = 120, .hw_value = 6, },
76         { .bitrate = 180, .hw_value = 7, },
77         { .bitrate = 240, .hw_value = 8, },
78         { .bitrate = 360, .hw_value = 9, },
79         { .bitrate = 480, .hw_value = 10, },
80         { .bitrate = 540, .hw_value = 11, },
81 };
82
83 static struct ieee80211_channel p54_achannels[] = {
84         { .center_freq = 4920 },
85         { .center_freq = 4940 },
86         { .center_freq = 4960 },
87         { .center_freq = 4980 },
88         { .center_freq = 5040 },
89         { .center_freq = 5060 },
90         { .center_freq = 5080 },
91         { .center_freq = 5170 },
92         { .center_freq = 5180 },
93         { .center_freq = 5190 },
94         { .center_freq = 5200 },
95         { .center_freq = 5210 },
96         { .center_freq = 5220 },
97         { .center_freq = 5230 },
98         { .center_freq = 5240 },
99         { .center_freq = 5260 },
100         { .center_freq = 5280 },
101         { .center_freq = 5300 },
102         { .center_freq = 5320 },
103         { .center_freq = 5500 },
104         { .center_freq = 5520 },
105         { .center_freq = 5540 },
106         { .center_freq = 5560 },
107         { .center_freq = 5580 },
108         { .center_freq = 5600 },
109         { .center_freq = 5620 },
110         { .center_freq = 5640 },
111         { .center_freq = 5660 },
112         { .center_freq = 5680 },
113         { .center_freq = 5700 },
114         { .center_freq = 5745 },
115         { .center_freq = 5765 },
116         { .center_freq = 5785 },
117         { .center_freq = 5805 },
118         { .center_freq = 5825 },
119 };
120
121 static struct ieee80211_supported_band band_5GHz = {
122         .channels = p54_achannels,
123         .n_channels = ARRAY_SIZE(p54_achannels),
124         .bitrates = p54_arates,
125         .n_bitrates = ARRAY_SIZE(p54_arates),
126 };
127
128 int p54_parse_firmware(struct ieee80211_hw *dev, const struct firmware *fw)
129 {
130         struct p54_common *priv = dev->priv;
131         struct bootrec_exp_if *exp_if;
132         struct bootrec *bootrec;
133         u32 *data = (u32 *)fw->data;
134         u32 *end_data = (u32 *)fw->data + (fw->size >> 2);
135         u8 *fw_version = NULL;
136         size_t len;
137         int i;
138
139         if (priv->rx_start)
140                 return 0;
141
142         while (data < end_data && *data)
143                 data++;
144
145         while (data < end_data && !*data)
146                 data++;
147
148         bootrec = (struct bootrec *) data;
149
150         while (bootrec->data <= end_data &&
151                (bootrec->data + (len = le32_to_cpu(bootrec->len))) <= end_data) {
152                 u32 code = le32_to_cpu(bootrec->code);
153                 switch (code) {
154                 case BR_CODE_COMPONENT_ID:
155                         priv->fw_interface = be32_to_cpup((__be32 *)
156                                              bootrec->data);
157                         switch (priv->fw_interface) {
158                         case FW_FMAC:
159                                 printk(KERN_INFO "p54: FreeMAC firmware\n");
160                                 break;
161                         case FW_LM20:
162                                 printk(KERN_INFO "p54: LM20 firmware\n");
163                                 break;
164                         case FW_LM86:
165                                 printk(KERN_INFO "p54: LM86 firmware\n");
166                                 break;
167                         case FW_LM87:
168                                 printk(KERN_INFO "p54: LM87 firmware\n");
169                                 break;
170                         default:
171                                 printk(KERN_INFO "p54: unknown firmware\n");
172                                 break;
173                         }
174                         break;
175                 case BR_CODE_COMPONENT_VERSION:
176                         /* 24 bytes should be enough for all firmwares */
177                         if (strnlen((unsigned char*)bootrec->data, 24) < 24)
178                                 fw_version = (unsigned char*)bootrec->data;
179                         break;
180                 case BR_CODE_DESCR: {
181                         struct bootrec_desc *desc =
182                                 (struct bootrec_desc *)bootrec->data;
183                         priv->rx_start = le32_to_cpu(desc->rx_start);
184                         /* FIXME add sanity checking */
185                         priv->rx_end = le32_to_cpu(desc->rx_end) - 0x3500;
186                         priv->headroom = desc->headroom;
187                         priv->tailroom = desc->tailroom;
188                         if (le32_to_cpu(bootrec->len) == 11)
189                                 priv->rx_mtu = le16_to_cpu(desc->rx_mtu);
190                         else
191                                 priv->rx_mtu = (size_t)
192                                         0x620 - priv->tx_hdr_len;
193                         break;
194                         }
195                 case BR_CODE_EXPOSED_IF:
196                         exp_if = (struct bootrec_exp_if *) bootrec->data;
197                         for (i = 0; i < (len * sizeof(*exp_if) / 4); i++)
198                                 if (exp_if[i].if_id == cpu_to_le16(0x1a))
199                                         priv->fw_var = le16_to_cpu(exp_if[i].variant);
200                         break;
201                 case BR_CODE_DEPENDENT_IF:
202                         break;
203                 case BR_CODE_END_OF_BRA:
204                 case LEGACY_BR_CODE_END_OF_BRA:
205                         end_data = NULL;
206                         break;
207                 default:
208                         break;
209                 }
210                 bootrec = (struct bootrec *)&bootrec->data[len];
211         }
212
213         if (fw_version)
214                 printk(KERN_INFO "p54: FW rev %s - Softmac protocol %x.%x\n",
215                         fw_version, priv->fw_var >> 8, priv->fw_var & 0xff);
216
217         if (priv->fw_var < 0x500)
218                 printk(KERN_INFO "p54: you are using an obsolete firmware. "
219                        "visit http://wireless.kernel.org/en/users/Drivers/p54 "
220                        "and grab one for \"kernel >= 2.6.28\"!\n");
221
222         if (priv->fw_var >= 0x300) {
223                 /* Firmware supports QoS, use it! */
224                 priv->tx_stats[4].limit = 3;            /* AC_VO */
225                 priv->tx_stats[5].limit = 4;            /* AC_VI */
226                 priv->tx_stats[6].limit = 3;            /* AC_BE */
227                 priv->tx_stats[7].limit = 2;            /* AC_BK */
228                 dev->queues = 4;
229         }
230
231         return 0;
232 }
233 EXPORT_SYMBOL_GPL(p54_parse_firmware);
234
235 static int p54_convert_rev0(struct ieee80211_hw *dev,
236                             struct pda_pa_curve_data *curve_data)
237 {
238         struct p54_common *priv = dev->priv;
239         struct p54_pa_curve_data_sample *dst;
240         struct pda_pa_curve_data_sample_rev0 *src;
241         size_t cd_len = sizeof(*curve_data) +
242                 (curve_data->points_per_channel*sizeof(*dst) + 2) *
243                  curve_data->channels;
244         unsigned int i, j;
245         void *source, *target;
246
247         priv->curve_data = kmalloc(cd_len, GFP_KERNEL);
248         if (!priv->curve_data)
249                 return -ENOMEM;
250
251         memcpy(priv->curve_data, curve_data, sizeof(*curve_data));
252         source = curve_data->data;
253         target = priv->curve_data->data;
254         for (i = 0; i < curve_data->channels; i++) {
255                 __le16 *freq = source;
256                 source += sizeof(__le16);
257                 *((__le16 *)target) = *freq;
258                 target += sizeof(__le16);
259                 for (j = 0; j < curve_data->points_per_channel; j++) {
260                         dst = target;
261                         src = source;
262
263                         dst->rf_power = src->rf_power;
264                         dst->pa_detector = src->pa_detector;
265                         dst->data_64qam = src->pcv;
266                         /* "invent" the points for the other modulations */
267 #define SUB(x,y) (u8)((x) - (y)) > (x) ? 0 : (x) - (y)
268                         dst->data_16qam = SUB(src->pcv, 12);
269                         dst->data_qpsk = SUB(dst->data_16qam, 12);
270                         dst->data_bpsk = SUB(dst->data_qpsk, 12);
271                         dst->data_barker = SUB(dst->data_bpsk, 14);
272 #undef SUB
273                         target += sizeof(*dst);
274                         source += sizeof(*src);
275                 }
276         }
277
278         return 0;
279 }
280
281 static int p54_convert_rev1(struct ieee80211_hw *dev,
282                             struct pda_pa_curve_data *curve_data)
283 {
284         struct p54_common *priv = dev->priv;
285         struct p54_pa_curve_data_sample *dst;
286         struct pda_pa_curve_data_sample_rev1 *src;
287         size_t cd_len = sizeof(*curve_data) +
288                 (curve_data->points_per_channel*sizeof(*dst) + 2) *
289                  curve_data->channels;
290         unsigned int i, j;
291         void *source, *target;
292
293         priv->curve_data = kmalloc(cd_len, GFP_KERNEL);
294         if (!priv->curve_data)
295                 return -ENOMEM;
296
297         memcpy(priv->curve_data, curve_data, sizeof(*curve_data));
298         source = curve_data->data;
299         target = priv->curve_data->data;
300         for (i = 0; i < curve_data->channels; i++) {
301                 __le16 *freq = source;
302                 source += sizeof(__le16);
303                 *((__le16 *)target) = *freq;
304                 target += sizeof(__le16);
305                 for (j = 0; j < curve_data->points_per_channel; j++) {
306                         memcpy(target, source, sizeof(*src));
307
308                         target += sizeof(*dst);
309                         source += sizeof(*src);
310                 }
311                 source++;
312         }
313
314         return 0;
315 }
316
317 static const char *p54_rf_chips[] = { "NULL", "Duette3", "Duette2",
318                               "Frisbee", "Xbow", "Longbow", "NULL", "NULL" };
319 static int p54_init_xbow_synth(struct ieee80211_hw *dev);
320
321 static int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
322 {
323         struct p54_common *priv = dev->priv;
324         struct eeprom_pda_wrap *wrap = NULL;
325         struct pda_entry *entry;
326         unsigned int data_len, entry_len;
327         void *tmp;
328         int err;
329         u8 *end = (u8 *)eeprom + len;
330         u16 synth = 0;
331
332         wrap = (struct eeprom_pda_wrap *) eeprom;
333         entry = (void *)wrap->data + le16_to_cpu(wrap->len);
334
335         /* verify that at least the entry length/code fits */
336         while ((u8 *)entry <= end - sizeof(*entry)) {
337                 entry_len = le16_to_cpu(entry->len);
338                 data_len = ((entry_len - 1) << 1);
339
340                 /* abort if entry exceeds whole structure */
341                 if ((u8 *)entry + sizeof(*entry) + data_len > end)
342                         break;
343
344                 switch (le16_to_cpu(entry->code)) {
345                 case PDR_MAC_ADDRESS:
346                         SET_IEEE80211_PERM_ADDR(dev, entry->data);
347                         break;
348                 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS:
349                         if (data_len < 2) {
350                                 err = -EINVAL;
351                                 goto err;
352                         }
353
354                         if (2 + entry->data[1]*sizeof(*priv->output_limit) > data_len) {
355                                 err = -EINVAL;
356                                 goto err;
357                         }
358
359                         priv->output_limit = kmalloc(entry->data[1] *
360                                 sizeof(*priv->output_limit), GFP_KERNEL);
361
362                         if (!priv->output_limit) {
363                                 err = -ENOMEM;
364                                 goto err;
365                         }
366
367                         memcpy(priv->output_limit, &entry->data[2],
368                                entry->data[1]*sizeof(*priv->output_limit));
369                         priv->output_limit_len = entry->data[1];
370                         break;
371                 case PDR_PRISM_PA_CAL_CURVE_DATA: {
372                         struct pda_pa_curve_data *curve_data =
373                                 (struct pda_pa_curve_data *)entry->data;
374                         if (data_len < sizeof(*curve_data)) {
375                                 err = -EINVAL;
376                                 goto err;
377                         }
378
379                         switch (curve_data->cal_method_rev) {
380                         case 0:
381                                 err = p54_convert_rev0(dev, curve_data);
382                                 break;
383                         case 1:
384                                 err = p54_convert_rev1(dev, curve_data);
385                                 break;
386                         default:
387                                 printk(KERN_ERR "p54: unknown curve data "
388                                                 "revision %d\n",
389                                                 curve_data->cal_method_rev);
390                                 err = -ENODEV;
391                                 break;
392                         }
393                         if (err)
394                                 goto err;
395
396                 }
397                 case PDR_PRISM_ZIF_TX_IQ_CALIBRATION:
398                         priv->iq_autocal = kmalloc(data_len, GFP_KERNEL);
399                         if (!priv->iq_autocal) {
400                                 err = -ENOMEM;
401                                 goto err;
402                         }
403
404                         memcpy(priv->iq_autocal, entry->data, data_len);
405                         priv->iq_autocal_len = data_len / sizeof(struct pda_iq_autocal_entry);
406                         break;
407                 case PDR_INTERFACE_LIST:
408                         tmp = entry->data;
409                         while ((u8 *)tmp < entry->data + data_len) {
410                                 struct bootrec_exp_if *exp_if = tmp;
411                                 if (le16_to_cpu(exp_if->if_id) == 0xf)
412                                         synth = le16_to_cpu(exp_if->variant);
413                                 tmp += sizeof(struct bootrec_exp_if);
414                         }
415                         break;
416                 case PDR_HARDWARE_PLATFORM_COMPONENT_ID:
417                         priv->version = *(u8 *)(entry->data + 1);
418                         break;
419                 case PDR_END:
420                         /* make it overrun */
421                         entry_len = len;
422                         break;
423                 case PDR_MANUFACTURING_PART_NUMBER:
424                 case PDR_PDA_VERSION:
425                 case PDR_NIC_SERIAL_NUMBER:
426                 case PDR_REGULATORY_DOMAIN_LIST:
427                 case PDR_TEMPERATURE_TYPE:
428                 case PDR_PRISM_PCI_IDENTIFIER:
429                 case PDR_COUNTRY_INFORMATION:
430                 case PDR_OEM_NAME:
431                 case PDR_PRODUCT_NAME:
432                 case PDR_UTF8_OEM_NAME:
433                 case PDR_UTF8_PRODUCT_NAME:
434                 case PDR_COUNTRY_LIST:
435                 case PDR_DEFAULT_COUNTRY:
436                 case PDR_ANTENNA_GAIN:
437                 case PDR_PRISM_INDIGO_PA_CALIBRATION_DATA:
438                 case PDR_RSSI_LINEAR_APPROXIMATION:
439                 case PDR_RSSI_LINEAR_APPROXIMATION_DUAL_BAND:
440                 case PDR_REGULATORY_POWER_LIMITS:
441                 case PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED:
442                 case PDR_RADIATED_TRANSMISSION_CORRECTION:
443                 case PDR_PRISM_TX_IQ_CALIBRATION:
444                 case PDR_BASEBAND_REGISTERS:
445                 case PDR_PER_CHANNEL_BASEBAND_REGISTERS:
446                         break;
447                 default:
448                         printk(KERN_INFO "p54: unknown eeprom code : 0x%x\n",
449                                 le16_to_cpu(entry->code));
450                         break;
451                 }
452
453                 entry = (void *)entry + (entry_len + 1)*2;
454         }
455
456         if (!synth || !priv->iq_autocal || !priv->output_limit ||
457             !priv->curve_data) {
458                 printk(KERN_ERR "p54: not all required entries found in eeprom!\n");
459                 err = -EINVAL;
460                 goto err;
461         }
462
463         priv->rxhw = synth & PDR_SYNTH_FRONTEND_MASK;
464         if (priv->rxhw == 4)
465                 p54_init_xbow_synth(dev);
466         if (!(synth & PDR_SYNTH_24_GHZ_DISABLED))
467                 dev->wiphy->bands[IEEE80211_BAND_2GHZ] = &band_2GHz;
468         if (!(synth & PDR_SYNTH_5_GHZ_DISABLED))
469                 dev->wiphy->bands[IEEE80211_BAND_5GHZ] = &band_5GHz;
470
471         if (!is_valid_ether_addr(dev->wiphy->perm_addr)) {
472                 u8 perm_addr[ETH_ALEN];
473
474                 printk(KERN_WARNING "%s: Invalid hwaddr! Using randomly generated MAC addr\n",
475                         wiphy_name(dev->wiphy));
476                 random_ether_addr(perm_addr);
477                 SET_IEEE80211_PERM_ADDR(dev, perm_addr);
478         }
479
480         printk(KERN_INFO "%s: hwaddr %pM, MAC:isl38%02x RF:%s\n",
481                 wiphy_name(dev->wiphy),
482                 dev->wiphy->perm_addr,
483                 priv->version, p54_rf_chips[priv->rxhw]);
484
485         return 0;
486
487   err:
488         if (priv->iq_autocal) {
489                 kfree(priv->iq_autocal);
490                 priv->iq_autocal = NULL;
491         }
492
493         if (priv->output_limit) {
494                 kfree(priv->output_limit);
495                 priv->output_limit = NULL;
496         }
497
498         if (priv->curve_data) {
499                 kfree(priv->curve_data);
500                 priv->curve_data = NULL;
501         }
502
503         printk(KERN_ERR "p54: eeprom parse failed!\n");
504         return err;
505 }
506
507 static int p54_rssi_to_dbm(struct ieee80211_hw *dev, int rssi)
508 {
509         /* TODO: get the rssi_add & rssi_mul data from the eeprom */
510         return ((rssi * 0x83) / 64 - 400) / 4;
511 }
512
513 static int p54_rx_data(struct ieee80211_hw *dev, struct sk_buff *skb)
514 {
515         struct p54_common *priv = dev->priv;
516         struct p54_rx_data *hdr = (struct p54_rx_data *) skb->data;
517         struct ieee80211_rx_status rx_status = {0};
518         u16 freq = le16_to_cpu(hdr->freq);
519         size_t header_len = sizeof(*hdr);
520         u32 tsf32;
521
522         if (!(hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_IN_FCS_GOOD))) {
523                 if (priv->filter_flags & FIF_FCSFAIL)
524                         rx_status.flag |= RX_FLAG_FAILED_FCS_CRC;
525                 else
526                         return 0;
527         }
528
529         rx_status.signal = p54_rssi_to_dbm(dev, hdr->rssi);
530         rx_status.noise = priv->noise;
531         /* XX correct? */
532         rx_status.qual = (100 * hdr->rssi) / 127;
533         if (hdr->rate & 0x10)
534                 rx_status.flag |= RX_FLAG_SHORTPRE;
535         rx_status.rate_idx = (dev->conf.channel->band == IEEE80211_BAND_2GHZ ?
536                         hdr->rate : (hdr->rate - 4)) & 0xf;
537         rx_status.freq = freq;
538         rx_status.band =  dev->conf.channel->band;
539         rx_status.antenna = hdr->antenna;
540
541         tsf32 = le32_to_cpu(hdr->tsf32);
542         if (tsf32 < priv->tsf_low32)
543                 priv->tsf_high32++;
544         rx_status.mactime = ((u64)priv->tsf_high32) << 32 | tsf32;
545         priv->tsf_low32 = tsf32;
546
547         rx_status.flag |= RX_FLAG_TSFT;
548
549         if (hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_ALIGN))
550                 header_len += hdr->align[0];
551
552         skb_pull(skb, header_len);
553         skb_trim(skb, le16_to_cpu(hdr->len));
554
555         ieee80211_rx_irqsafe(dev, skb, &rx_status);
556
557         return -1;
558 }
559
560 static void inline p54_wake_free_queues(struct ieee80211_hw *dev)
561 {
562         struct p54_common *priv = dev->priv;
563         int i;
564
565         if (priv->mode == NL80211_IFTYPE_UNSPECIFIED)
566                 return ;
567
568         for (i = 0; i < dev->queues; i++)
569                 if (priv->tx_stats[i + 4].len < priv->tx_stats[i + 4].limit)
570                         ieee80211_wake_queue(dev, i);
571 }
572
573 void p54_free_skb(struct ieee80211_hw *dev, struct sk_buff *skb)
574 {
575         struct p54_common *priv = dev->priv;
576         struct ieee80211_tx_info *info;
577         struct memrecord *range;
578         unsigned long flags;
579         u32 freed = 0, last_addr = priv->rx_start;
580
581         if (unlikely(!skb || !dev || !skb_queue_len(&priv->tx_queue)))
582                 return;
583
584         spin_lock_irqsave(&priv->tx_queue.lock, flags);
585         info = IEEE80211_SKB_CB(skb);
586         range = (void *)info->rate_driver_data;
587         if (skb->prev != (struct sk_buff *)&priv->tx_queue) {
588                 struct ieee80211_tx_info *ni;
589                 struct memrecord *mr;
590
591                 ni = IEEE80211_SKB_CB(skb->prev);
592                 mr = (struct memrecord *)ni->rate_driver_data;
593                 last_addr = mr->end_addr;
594         }
595         if (skb->next != (struct sk_buff *)&priv->tx_queue) {
596                 struct ieee80211_tx_info *ni;
597                 struct memrecord *mr;
598
599                 ni = IEEE80211_SKB_CB(skb->next);
600                 mr = (struct memrecord *)ni->rate_driver_data;
601                 freed = mr->start_addr - last_addr;
602         } else
603                 freed = priv->rx_end - last_addr;
604         __skb_unlink(skb, &priv->tx_queue);
605         spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
606         kfree_skb(skb);
607
608         if (freed >= priv->headroom + sizeof(struct p54_hdr) + 48 +
609                      IEEE80211_MAX_RTS_THRESHOLD + priv->tailroom)
610                 p54_wake_free_queues(dev);
611 }
612 EXPORT_SYMBOL_GPL(p54_free_skb);
613
614 static void p54_rx_frame_sent(struct ieee80211_hw *dev, struct sk_buff *skb)
615 {
616         struct p54_common *priv = dev->priv;
617         struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
618         struct p54_frame_sent *payload = (struct p54_frame_sent *) hdr->data;
619         struct sk_buff *entry = (struct sk_buff *) priv->tx_queue.next;
620         u32 addr = le32_to_cpu(hdr->req_id) - priv->headroom;
621         struct memrecord *range = NULL;
622         u32 freed = 0;
623         u32 last_addr = priv->rx_start;
624         unsigned long flags;
625         int count, idx;
626
627         spin_lock_irqsave(&priv->tx_queue.lock, flags);
628         while (entry != (struct sk_buff *)&priv->tx_queue) {
629                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(entry);
630                 struct p54_hdr *entry_hdr;
631                 struct p54_tx_data *entry_data;
632                 int pad = 0;
633
634                 range = (void *)info->rate_driver_data;
635                 if (range->start_addr != addr) {
636                         last_addr = range->end_addr;
637                         entry = entry->next;
638                         continue;
639                 }
640
641                 if (entry->next != (struct sk_buff *)&priv->tx_queue) {
642                         struct ieee80211_tx_info *ni;
643                         struct memrecord *mr;
644
645                         ni = IEEE80211_SKB_CB(entry->next);
646                         mr = (struct memrecord *)ni->rate_driver_data;
647                         freed = mr->start_addr - last_addr;
648                 } else
649                         freed = priv->rx_end - last_addr;
650
651                 last_addr = range->end_addr;
652                 __skb_unlink(entry, &priv->tx_queue);
653                 spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
654
655                 entry_hdr = (struct p54_hdr *) entry->data;
656                 entry_data = (struct p54_tx_data *) entry_hdr->data;
657                 priv->tx_stats[entry_data->hw_queue].len--;
658
659                 if (unlikely(entry == priv->cached_beacon)) {
660                         kfree_skb(entry);
661                         priv->cached_beacon = NULL;
662                         goto out;
663                 }
664
665                 /*
666                  * Clear manually, ieee80211_tx_info_clear_status would
667                  * clear the counts too and we need them.
668                  */
669                 memset(&info->status.ampdu_ack_len, 0,
670                        sizeof(struct ieee80211_tx_info) -
671                        offsetof(struct ieee80211_tx_info, status.ampdu_ack_len));
672                 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info,
673                                       status.ampdu_ack_len) != 23);
674
675                 if (entry_hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_ALIGN))
676                         pad = entry_data->align[0];
677
678                 /* walk through the rates array and adjust the counts */
679                 count = payload->tries;
680                 for (idx = 0; idx < 4; idx++) {
681                         if (count >= info->status.rates[idx].count) {
682                                 count -= info->status.rates[idx].count;
683                         } else if (count > 0) {
684                                 info->status.rates[idx].count = count;
685                                 count = 0;
686                         } else {
687                                 info->status.rates[idx].idx = -1;
688                                 info->status.rates[idx].count = 0;
689                         }
690                 }
691
692                 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) &&
693                      (!payload->status))
694                         info->flags |= IEEE80211_TX_STAT_ACK;
695                 if (payload->status & P54_TX_PSM_CANCELLED)
696                         info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
697                 info->status.ack_signal = p54_rssi_to_dbm(dev,
698                                 (int)payload->ack_rssi);
699                 skb_pull(entry, sizeof(*hdr) + pad + sizeof(*entry_data));
700                 ieee80211_tx_status_irqsafe(dev, entry);
701                 goto out;
702         }
703         spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
704
705 out:
706         if (freed >= priv->headroom + sizeof(struct p54_hdr) + 48 +
707                      IEEE80211_MAX_RTS_THRESHOLD + priv->tailroom)
708                 p54_wake_free_queues(dev);
709 }
710
711 static void p54_rx_eeprom_readback(struct ieee80211_hw *dev,
712                                    struct sk_buff *skb)
713 {
714         struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
715         struct p54_eeprom_lm86 *eeprom = (struct p54_eeprom_lm86 *) hdr->data;
716         struct p54_common *priv = dev->priv;
717
718         if (!priv->eeprom)
719                 return ;
720
721         memcpy(priv->eeprom, eeprom->data, le16_to_cpu(eeprom->len));
722
723         complete(&priv->eeprom_comp);
724 }
725
726 static void p54_rx_stats(struct ieee80211_hw *dev, struct sk_buff *skb)
727 {
728         struct p54_common *priv = dev->priv;
729         struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
730         struct p54_statistics *stats = (struct p54_statistics *) hdr->data;
731         u32 tsf32 = le32_to_cpu(stats->tsf32);
732
733         if (tsf32 < priv->tsf_low32)
734                 priv->tsf_high32++;
735         priv->tsf_low32 = tsf32;
736
737         priv->stats.dot11RTSFailureCount = le32_to_cpu(stats->rts_fail);
738         priv->stats.dot11RTSSuccessCount = le32_to_cpu(stats->rts_success);
739         priv->stats.dot11FCSErrorCount = le32_to_cpu(stats->rx_bad_fcs);
740
741         priv->noise = p54_rssi_to_dbm(dev, le32_to_cpu(stats->noise));
742         complete(&priv->stats_comp);
743
744         mod_timer(&priv->stats_timer, jiffies + 5 * HZ);
745 }
746
747 static void p54_rx_trap(struct ieee80211_hw *dev, struct sk_buff *skb)
748 {
749         struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
750         struct p54_trap *trap = (struct p54_trap *) hdr->data;
751         u16 event = le16_to_cpu(trap->event);
752         u16 freq = le16_to_cpu(trap->frequency);
753
754         switch (event) {
755         case P54_TRAP_BEACON_TX:
756                 break;
757         case P54_TRAP_RADAR:
758                 printk(KERN_INFO "%s: radar (freq:%d MHz)\n",
759                         wiphy_name(dev->wiphy), freq);
760                 break;
761         case P54_TRAP_NO_BEACON:
762                 break;
763         case P54_TRAP_SCAN:
764                 break;
765         case P54_TRAP_TBTT:
766                 break;
767         case P54_TRAP_TIMER:
768                 break;
769         default:
770                 printk(KERN_INFO "%s: received event:%x freq:%d\n",
771                        wiphy_name(dev->wiphy), event, freq);
772                 break;
773         }
774 }
775
776 static int p54_rx_control(struct ieee80211_hw *dev, struct sk_buff *skb)
777 {
778         struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
779
780         switch (le16_to_cpu(hdr->type)) {
781         case P54_CONTROL_TYPE_TXDONE:
782                 p54_rx_frame_sent(dev, skb);
783                 break;
784         case P54_CONTROL_TYPE_TRAP:
785                 p54_rx_trap(dev, skb);
786                 break;
787         case P54_CONTROL_TYPE_BBP:
788                 break;
789         case P54_CONTROL_TYPE_STAT_READBACK:
790                 p54_rx_stats(dev, skb);
791                 break;
792         case P54_CONTROL_TYPE_EEPROM_READBACK:
793                 p54_rx_eeprom_readback(dev, skb);
794                 break;
795         default:
796                 printk(KERN_DEBUG "%s: not handling 0x%02x type control frame\n",
797                        wiphy_name(dev->wiphy), le16_to_cpu(hdr->type));
798                 break;
799         }
800
801         return 0;
802 }
803
804 /* returns zero if skb can be reused */
805 int p54_rx(struct ieee80211_hw *dev, struct sk_buff *skb)
806 {
807         u16 type = le16_to_cpu(*((__le16 *)skb->data));
808
809         if (type & P54_HDR_FLAG_CONTROL)
810                 return p54_rx_control(dev, skb);
811         else
812                 return p54_rx_data(dev, skb);
813 }
814 EXPORT_SYMBOL_GPL(p54_rx);
815
816 /*
817  * So, the firmware is somewhat stupid and doesn't know what places in its
818  * memory incoming data should go to. By poking around in the firmware, we
819  * can find some unused memory to upload our packets to. However, data that we
820  * want the card to TX needs to stay intact until the card has told us that
821  * it is done with it. This function finds empty places we can upload to and
822  * marks allocated areas as reserved if necessary. p54_rx_frame_sent frees
823  * allocated areas.
824  */
825 static int p54_assign_address(struct ieee80211_hw *dev, struct sk_buff *skb,
826                                struct p54_hdr *data, u32 len)
827 {
828         struct p54_common *priv = dev->priv;
829         struct sk_buff *entry = priv->tx_queue.next;
830         struct sk_buff *target_skb = NULL;
831         struct ieee80211_tx_info *info;
832         struct memrecord *range;
833         u32 last_addr = priv->rx_start;
834         u32 largest_hole = 0;
835         u32 target_addr = priv->rx_start;
836         unsigned long flags;
837         unsigned int left;
838         len = (len + priv->headroom + priv->tailroom + 3) & ~0x3;
839
840         if (!skb)
841                 return -EINVAL;
842
843         spin_lock_irqsave(&priv->tx_queue.lock, flags);
844         left = skb_queue_len(&priv->tx_queue);
845         while (left--) {
846                 u32 hole_size;
847                 info = IEEE80211_SKB_CB(entry);
848                 range = (void *)info->rate_driver_data;
849                 hole_size = range->start_addr - last_addr;
850                 if (!target_skb && hole_size >= len) {
851                         target_skb = entry->prev;
852                         hole_size -= len;
853                         target_addr = last_addr;
854                 }
855                 largest_hole = max(largest_hole, hole_size);
856                 last_addr = range->end_addr;
857                 entry = entry->next;
858         }
859         if (!target_skb && priv->rx_end - last_addr >= len) {
860                 target_skb = priv->tx_queue.prev;
861                 largest_hole = max(largest_hole, priv->rx_end - last_addr - len);
862                 if (!skb_queue_empty(&priv->tx_queue)) {
863                         info = IEEE80211_SKB_CB(target_skb);
864                         range = (void *)info->rate_driver_data;
865                         target_addr = range->end_addr;
866                 }
867         } else
868                 largest_hole = max(largest_hole, priv->rx_end - last_addr);
869
870         if (!target_skb) {
871                 spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
872                 ieee80211_stop_queues(dev);
873                 return -ENOMEM;
874         }
875
876         info = IEEE80211_SKB_CB(skb);
877         range = (void *)info->rate_driver_data;
878         range->start_addr = target_addr;
879         range->end_addr = target_addr + len;
880         __skb_queue_after(&priv->tx_queue, target_skb, skb);
881         spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
882
883         if (largest_hole < priv->headroom + sizeof(struct p54_hdr) +
884                            48 + IEEE80211_MAX_RTS_THRESHOLD + priv->tailroom)
885                 ieee80211_stop_queues(dev);
886
887         data->req_id = cpu_to_le32(target_addr + priv->headroom);
888         return 0;
889 }
890
891 static struct sk_buff *p54_alloc_skb(struct ieee80211_hw *dev,
892                 u16 hdr_flags, u16 len, u16 type, gfp_t memflags)
893 {
894         struct p54_common *priv = dev->priv;
895         struct p54_hdr *hdr;
896         struct sk_buff *skb;
897
898         skb = __dev_alloc_skb(len + priv->tx_hdr_len, memflags);
899         if (!skb)
900                 return NULL;
901         skb_reserve(skb, priv->tx_hdr_len);
902
903         hdr = (struct p54_hdr *) skb_put(skb, sizeof(*hdr));
904         hdr->flags = cpu_to_le16(hdr_flags);
905         hdr->len = cpu_to_le16(len - sizeof(*hdr));
906         hdr->type = cpu_to_le16(type);
907         hdr->tries = hdr->rts_tries = 0;
908
909         if (unlikely(p54_assign_address(dev, skb, hdr, len))) {
910                 kfree_skb(skb);
911                 return NULL;
912         }
913         return skb;
914 }
915
916 int p54_read_eeprom(struct ieee80211_hw *dev)
917 {
918         struct p54_common *priv = dev->priv;
919         struct p54_hdr *hdr = NULL;
920         struct p54_eeprom_lm86 *eeprom_hdr;
921         struct sk_buff *skb;
922         size_t eeprom_size = 0x2020, offset = 0, blocksize;
923         int ret = -ENOMEM;
924         void *eeprom = NULL;
925
926         skb = p54_alloc_skb(dev, 0x8000, sizeof(*hdr) + sizeof(*eeprom_hdr) +
927                             EEPROM_READBACK_LEN,
928                             P54_CONTROL_TYPE_EEPROM_READBACK, GFP_KERNEL);
929         if (!skb)
930                 goto free;
931         priv->eeprom = kzalloc(EEPROM_READBACK_LEN, GFP_KERNEL);
932         if (!priv->eeprom)
933                 goto free;
934         eeprom = kzalloc(eeprom_size, GFP_KERNEL);
935         if (!eeprom)
936                 goto free;
937
938         eeprom_hdr = (struct p54_eeprom_lm86 *) skb_put(skb,
939                      sizeof(*eeprom_hdr) + EEPROM_READBACK_LEN);
940
941         while (eeprom_size) {
942                 blocksize = min(eeprom_size, (size_t)EEPROM_READBACK_LEN);
943                 eeprom_hdr->offset = cpu_to_le16(offset);
944                 eeprom_hdr->len = cpu_to_le16(blocksize);
945                 priv->tx(dev, skb, 0);
946
947                 if (!wait_for_completion_interruptible_timeout(&priv->eeprom_comp, HZ)) {
948                         printk(KERN_ERR "%s: device does not respond!\n",
949                                 wiphy_name(dev->wiphy));
950                         ret = -EBUSY;
951                         goto free;
952                 }
953
954                 memcpy(eeprom + offset, priv->eeprom, blocksize);
955                 offset += blocksize;
956                 eeprom_size -= blocksize;
957         }
958
959         ret = p54_parse_eeprom(dev, eeprom, offset);
960 free:
961         kfree(priv->eeprom);
962         priv->eeprom = NULL;
963         p54_free_skb(dev, skb);
964         kfree(eeprom);
965
966         return ret;
967 }
968 EXPORT_SYMBOL_GPL(p54_read_eeprom);
969
970 static int p54_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta,
971                 bool set)
972 {
973         struct p54_common *priv = dev->priv;
974         struct sk_buff *skb;
975         struct p54_tim *tim;
976
977         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET,
978                       sizeof(struct p54_hdr) + sizeof(*tim),
979                       P54_CONTROL_TYPE_TIM, GFP_KERNEL);
980         if (!skb)
981                 return -ENOMEM;
982
983         tim = (struct p54_tim *) skb_put(skb, sizeof(*tim));
984         tim->count = 1;
985         tim->entry[0] = cpu_to_le16(set ? (sta->aid | 0x8000) : sta->aid);
986         priv->tx(dev, skb, 1);
987         return 0;
988 }
989
990 static int p54_sta_unlock(struct ieee80211_hw *dev, u8 *addr)
991 {
992         struct p54_common *priv = dev->priv;
993         struct sk_buff *skb;
994         struct p54_sta_unlock *sta;
995
996         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET,
997                 sizeof(struct p54_hdr) + sizeof(*sta),
998                 P54_CONTROL_TYPE_PSM_STA_UNLOCK, GFP_ATOMIC);
999         if (!skb)
1000                 return -ENOMEM;
1001
1002         sta = (struct p54_sta_unlock *)skb_put(skb, sizeof(*sta));
1003         memcpy(sta->addr, addr, ETH_ALEN);
1004         priv->tx(dev, skb, 1);
1005         return 0;
1006 }
1007
1008 static void p54_sta_notify_ps(struct ieee80211_hw *dev,
1009                               enum sta_notify_ps_cmd notify_cmd,
1010                               struct ieee80211_sta *sta)
1011 {
1012         switch (notify_cmd) {
1013         case STA_NOTIFY_AWAKE:
1014                 p54_sta_unlock(dev, sta->addr);
1015                 break;
1016         default:
1017                 break;
1018         }
1019 }
1020
1021 static void p54_sta_notify(struct ieee80211_hw *dev, struct ieee80211_vif *vif,
1022                               enum sta_notify_cmd notify_cmd,
1023                               struct ieee80211_sta *sta)
1024 {
1025         switch (notify_cmd) {
1026         case STA_NOTIFY_ADD:
1027         case STA_NOTIFY_REMOVE:
1028                 /*
1029                  * Notify the firmware that we don't want or we don't
1030                  * need to buffer frames for this station anymore.
1031                  */
1032
1033                 p54_sta_unlock(dev, sta->addr);
1034                 break;
1035         default:
1036                 break;
1037         }
1038 }
1039
1040 static int p54_tx_cancel(struct ieee80211_hw *dev, struct sk_buff *entry)
1041 {
1042         struct p54_common *priv = dev->priv;
1043         struct sk_buff *skb;
1044         struct p54_hdr *hdr;
1045         struct p54_txcancel *cancel;
1046
1047         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET,
1048                 sizeof(struct p54_hdr) + sizeof(*cancel),
1049                 P54_CONTROL_TYPE_TXCANCEL, GFP_ATOMIC);
1050         if (!skb)
1051                 return -ENOMEM;
1052
1053         hdr = (void *)entry->data;
1054         cancel = (struct p54_txcancel *)skb_put(skb, sizeof(*cancel));
1055         cancel->req_id = hdr->req_id;
1056         priv->tx(dev, skb, 1);
1057         return 0;
1058 }
1059
1060 static int p54_tx_fill(struct ieee80211_hw *dev, struct sk_buff *skb,
1061                 struct ieee80211_tx_info *info, u8 *queue, size_t *extra_len,
1062                 u16 *flags, u16 *aid)
1063 {
1064         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1065         struct p54_common *priv = dev->priv;
1066         int ret = 0;
1067
1068         if (unlikely(ieee80211_is_mgmt(hdr->frame_control))) {
1069                 if (ieee80211_is_beacon(hdr->frame_control)) {
1070                         *aid = 0;
1071                         *queue = 0;
1072                         *extra_len = IEEE80211_MAX_TIM_LEN;
1073                         *flags = P54_HDR_FLAG_DATA_OUT_TIMESTAMP;
1074                         return 0;
1075                 } else if (ieee80211_is_probe_resp(hdr->frame_control)) {
1076                         *aid = 0;
1077                         *queue = 2;
1078                         *flags = P54_HDR_FLAG_DATA_OUT_TIMESTAMP |
1079                                  P54_HDR_FLAG_DATA_OUT_NOCANCEL;
1080                         return 0;
1081                 } else {
1082                         *queue = 2;
1083                         ret = 0;
1084                 }
1085         } else {
1086                 *queue += 4;
1087                 ret = 1;
1088         }
1089
1090         switch (priv->mode) {
1091         case NL80211_IFTYPE_STATION:
1092                 *aid = 1;
1093                 break;
1094         case NL80211_IFTYPE_AP:
1095         case NL80211_IFTYPE_ADHOC:
1096         case NL80211_IFTYPE_MESH_POINT:
1097                 if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
1098                         *aid = 0;
1099                         *queue = 3;
1100                         return 0;
1101                 }
1102                 if (info->control.sta)
1103                         *aid = info->control.sta->aid;
1104                 else
1105                         *flags |= P54_HDR_FLAG_DATA_OUT_NOCANCEL;
1106         }
1107         return ret;
1108 }
1109
1110 static int p54_tx(struct ieee80211_hw *dev, struct sk_buff *skb)
1111 {
1112         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1113         struct ieee80211_tx_queue_stats *current_queue = NULL;
1114         struct p54_common *priv = dev->priv;
1115         struct p54_hdr *hdr;
1116         struct p54_tx_data *txhdr;
1117         size_t padding, len, tim_len = 0;
1118         int i, j, ridx, ret;
1119         u16 hdr_flags = 0, aid = 0;
1120         u8 rate, queue;
1121         u8 cts_rate = 0x20;
1122         u8 rc_flags;
1123         u8 calculated_tries[4];
1124         u8 nrates = 0, nremaining = 8;
1125
1126         queue = skb_get_queue_mapping(skb);
1127
1128         ret = p54_tx_fill(dev, skb, info, &queue, &tim_len, &hdr_flags, &aid);
1129         current_queue = &priv->tx_stats[queue];
1130         if (unlikely((current_queue->len > current_queue->limit) && ret))
1131                 return NETDEV_TX_BUSY;
1132         current_queue->len++;
1133         current_queue->count++;
1134         if ((current_queue->len == current_queue->limit) && ret)
1135                 ieee80211_stop_queue(dev, skb_get_queue_mapping(skb));
1136
1137         padding = (unsigned long)(skb->data - (sizeof(*hdr) + sizeof(*txhdr))) & 3;
1138         len = skb->len;
1139
1140         txhdr = (struct p54_tx_data *) skb_push(skb, sizeof(*txhdr) + padding);
1141         hdr = (struct p54_hdr *) skb_push(skb, sizeof(*hdr));
1142
1143         if (padding)
1144                 hdr_flags |= P54_HDR_FLAG_DATA_ALIGN;
1145         hdr->len = cpu_to_le16(len);
1146         hdr->type = cpu_to_le16(aid);
1147         hdr->rts_tries = info->control.rates[0].count;
1148
1149         /*
1150          * we register the rates in perfect order, and
1151          * RTS/CTS won't happen on 5 GHz
1152          */
1153         cts_rate = info->control.rts_cts_rate_idx;
1154
1155         memset(&txhdr->rateset, 0, sizeof(txhdr->rateset));
1156
1157         /* see how many rates got used */
1158         for (i = 0; i < 4; i++) {
1159                 if (info->control.rates[i].idx < 0)
1160                         break;
1161                 nrates++;
1162         }
1163
1164         /* limit tries to 8/nrates per rate */
1165         for (i = 0; i < nrates; i++) {
1166                 /*
1167                  * The magic expression here is equivalent to 8/nrates for
1168                  * all values that matter, but avoids division and jumps.
1169                  * Note that nrates can only take the values 1 through 4.
1170                  */
1171                 calculated_tries[i] = min_t(int, ((15 >> nrates) | 1) + 1,
1172                                                  info->control.rates[i].count);
1173                 nremaining -= calculated_tries[i];
1174         }
1175
1176         /* if there are tries left, distribute from back to front */
1177         for (i = nrates - 1; nremaining > 0 && i >= 0; i--) {
1178                 int tmp = info->control.rates[i].count - calculated_tries[i];
1179
1180                 if (tmp <= 0)
1181                         continue;
1182                 /* RC requested more tries at this rate */
1183
1184                 tmp = min_t(int, tmp, nremaining);
1185                 calculated_tries[i] += tmp;
1186                 nremaining -= tmp;
1187         }
1188
1189         ridx = 0;
1190         for (i = 0; i < nrates && ridx < 8; i++) {
1191                 /* we register the rates in perfect order */
1192                 rate = info->control.rates[i].idx;
1193                 if (info->band == IEEE80211_BAND_5GHZ)
1194                         rate += 4;
1195
1196                 /* store the count we actually calculated for TX status */
1197                 info->control.rates[i].count = calculated_tries[i];
1198
1199                 rc_flags = info->control.rates[i].flags;
1200                 if (rc_flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) {
1201                         rate |= 0x10;
1202                         cts_rate |= 0x10;
1203                 }
1204                 if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS)
1205                         rate |= 0x40;
1206                 else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
1207                         rate |= 0x20;
1208                 for (j = 0; j < calculated_tries[i] && ridx < 8; j++) {
1209                         txhdr->rateset[ridx] = rate;
1210                         ridx++;
1211                 }
1212         }
1213
1214         if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
1215                 hdr_flags |= P54_HDR_FLAG_DATA_OUT_SEQNR;
1216
1217         /* TODO: enable bursting */
1218         hdr->flags = cpu_to_le16(hdr_flags);
1219         hdr->tries = ridx;
1220         txhdr->crypt_offset = 0;
1221         txhdr->rts_rate_idx = 0;
1222         txhdr->key_type = 0;
1223         txhdr->key_len = 0;
1224         txhdr->hw_queue = queue;
1225         if (current_queue)
1226                 txhdr->backlog = current_queue->len;
1227         else
1228                 txhdr->backlog = 0;
1229         memset(txhdr->durations, 0, sizeof(txhdr->durations));
1230         txhdr->tx_antenna = (info->antenna_sel_tx == 0) ?
1231                 2 : info->antenna_sel_tx - 1;
1232         txhdr->output_power = priv->output_power;
1233         txhdr->cts_rate = cts_rate;
1234         if (padding)
1235                 txhdr->align[0] = padding;
1236
1237         /* modifies skb->cb and with it info, so must be last! */
1238         if (unlikely(p54_assign_address(dev, skb, hdr, skb->len + tim_len))) {
1239                 skb_pull(skb, sizeof(*hdr) + sizeof(*txhdr) + padding);
1240                 if (current_queue) {
1241                         current_queue->len--;
1242                         current_queue->count--;
1243                 }
1244                 return NETDEV_TX_BUSY;
1245         }
1246         priv->tx(dev, skb, 0);
1247         return 0;
1248 }
1249
1250 static int p54_setup_mac(struct ieee80211_hw *dev, u16 mode, const u8 *bssid)
1251 {
1252         struct p54_common *priv = dev->priv;
1253         struct sk_buff *skb;
1254         struct p54_setup_mac *setup;
1255
1256         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*setup) +
1257                             sizeof(struct p54_hdr), P54_CONTROL_TYPE_SETUP,
1258                             GFP_ATOMIC);
1259         if (!skb)
1260                 return -ENOMEM;
1261
1262         setup = (struct p54_setup_mac *) skb_put(skb, sizeof(*setup));
1263         priv->mac_mode = mode;
1264         setup->mac_mode = cpu_to_le16(mode);
1265         memcpy(setup->mac_addr, priv->mac_addr, ETH_ALEN);
1266         if (!bssid)
1267                 memset(setup->bssid, ~0, ETH_ALEN);
1268         else
1269                 memcpy(setup->bssid, bssid, ETH_ALEN);
1270         setup->rx_antenna = priv->rx_antenna;
1271         setup->rx_align = 0;
1272         if (priv->fw_var < 0x500) {
1273                 setup->v1.basic_rate_mask = cpu_to_le32(priv->basic_rate_mask);
1274                 memset(setup->v1.rts_rates, 0, 8);
1275                 setup->v1.rx_addr = cpu_to_le32(priv->rx_end);
1276                 setup->v1.max_rx = cpu_to_le16(priv->rx_mtu);
1277                 setup->v1.rxhw = cpu_to_le16(priv->rxhw);
1278                 setup->v1.wakeup_timer = cpu_to_le16(priv->wakeup_timer);
1279                 setup->v1.unalloc0 = cpu_to_le16(0);
1280         } else {
1281                 setup->v2.rx_addr = cpu_to_le32(priv->rx_end);
1282                 setup->v2.max_rx = cpu_to_le16(priv->rx_mtu);
1283                 setup->v2.rxhw = cpu_to_le16(priv->rxhw);
1284                 setup->v2.timer = cpu_to_le16(priv->wakeup_timer);
1285                 setup->v2.truncate = cpu_to_le16(48896);
1286                 setup->v2.basic_rate_mask = cpu_to_le32(priv->basic_rate_mask);
1287                 setup->v2.sbss_offset = 0;
1288                 setup->v2.mcast_window = 0;
1289                 setup->v2.rx_rssi_threshold = 0;
1290                 setup->v2.rx_ed_threshold = 0;
1291                 setup->v2.ref_clock = cpu_to_le32(644245094);
1292                 setup->v2.lpf_bandwidth = cpu_to_le16(65535);
1293                 setup->v2.osc_start_delay = cpu_to_le16(65535);
1294         }
1295         priv->tx(dev, skb, 1);
1296         return 0;
1297 }
1298
1299 static int p54_set_freq(struct ieee80211_hw *dev, u16 frequency)
1300 {
1301         struct p54_common *priv = dev->priv;
1302         struct sk_buff *skb;
1303         struct p54_scan *chan;
1304         unsigned int i;
1305         void *entry;
1306         __le16 freq = cpu_to_le16(frequency);
1307
1308         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*chan) +
1309                             sizeof(struct p54_hdr), P54_CONTROL_TYPE_SCAN,
1310                             GFP_ATOMIC);
1311         if (!skb)
1312                 return -ENOMEM;
1313
1314         chan = (struct p54_scan *) skb_put(skb, sizeof(*chan));
1315         memset(chan->padding1, 0, sizeof(chan->padding1));
1316         chan->mode = cpu_to_le16(P54_SCAN_EXIT);
1317         chan->dwell = cpu_to_le16(0x0);
1318
1319         for (i = 0; i < priv->iq_autocal_len; i++) {
1320                 if (priv->iq_autocal[i].freq != freq)
1321                         continue;
1322
1323                 memcpy(&chan->iq_autocal, &priv->iq_autocal[i],
1324                        sizeof(*priv->iq_autocal));
1325                 break;
1326         }
1327         if (i == priv->iq_autocal_len)
1328                 goto err;
1329
1330         for (i = 0; i < priv->output_limit_len; i++) {
1331                 if (priv->output_limit[i].freq != freq)
1332                         continue;
1333
1334                 chan->val_barker = 0x38;
1335                 chan->val_bpsk = chan->dup_bpsk =
1336                         priv->output_limit[i].val_bpsk;
1337                 chan->val_qpsk = chan->dup_qpsk =
1338                         priv->output_limit[i].val_qpsk;
1339                 chan->val_16qam = chan->dup_16qam =
1340                         priv->output_limit[i].val_16qam;
1341                 chan->val_64qam = chan->dup_64qam =
1342                         priv->output_limit[i].val_64qam;
1343                 break;
1344         }
1345         if (i == priv->output_limit_len)
1346                 goto err;
1347
1348         entry = priv->curve_data->data;
1349         for (i = 0; i < priv->curve_data->channels; i++) {
1350                 if (*((__le16 *)entry) != freq) {
1351                         entry += sizeof(__le16);
1352                         entry += sizeof(struct p54_pa_curve_data_sample) *
1353                                  priv->curve_data->points_per_channel;
1354                         continue;
1355                 }
1356
1357                 entry += sizeof(__le16);
1358                 chan->pa_points_per_curve = 8;
1359                 memset(chan->curve_data, 0, sizeof(*chan->curve_data));
1360                 memcpy(chan->curve_data, entry,
1361                        sizeof(struct p54_pa_curve_data_sample) *
1362                        min((u8)8, priv->curve_data->points_per_channel));
1363                 break;
1364         }
1365
1366         if (priv->fw_var < 0x500) {
1367                 chan->v1.rssical_mul = cpu_to_le16(130);
1368                 chan->v1.rssical_add = cpu_to_le16(0xfe70);
1369         } else {
1370                 chan->v2.rssical_mul = cpu_to_le16(130);
1371                 chan->v2.rssical_add = cpu_to_le16(0xfe70);
1372                 chan->v2.basic_rate_mask = cpu_to_le32(priv->basic_rate_mask);
1373                 memset(chan->v2.rts_rates, 0, 8);
1374         }
1375         priv->tx(dev, skb, 1);
1376         return 0;
1377
1378  err:
1379         printk(KERN_ERR "%s: frequency change failed\n", wiphy_name(dev->wiphy));
1380         kfree_skb(skb);
1381         return -EINVAL;
1382 }
1383
1384 static int p54_set_leds(struct ieee80211_hw *dev, int mode, int link, int act)
1385 {
1386         struct p54_common *priv = dev->priv;
1387         struct sk_buff *skb;
1388         struct p54_led *led;
1389
1390         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*led) +
1391                         sizeof(struct p54_hdr), P54_CONTROL_TYPE_LED,
1392                         GFP_ATOMIC);
1393         if (!skb)
1394                 return -ENOMEM;
1395
1396         led = (struct p54_led *)skb_put(skb, sizeof(*led));
1397         led->mode = cpu_to_le16(mode);
1398         led->led_permanent = cpu_to_le16(link);
1399         led->led_temporary = cpu_to_le16(act);
1400         led->duration = cpu_to_le16(1000);
1401         priv->tx(dev, skb, 1);
1402         return 0;
1403 }
1404
1405 #define P54_SET_QUEUE(queue, ai_fs, cw_min, cw_max, _txop)      \
1406 do {                                                            \
1407         queue.aifs = cpu_to_le16(ai_fs);                        \
1408         queue.cwmin = cpu_to_le16(cw_min);                      \
1409         queue.cwmax = cpu_to_le16(cw_max);                      \
1410         queue.txop = cpu_to_le16(_txop);                        \
1411 } while(0)
1412
1413 static int p54_set_edcf(struct ieee80211_hw *dev)
1414 {
1415         struct p54_common *priv = dev->priv;
1416         struct sk_buff *skb;
1417         struct p54_edcf *edcf;
1418
1419         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*edcf) +
1420                         sizeof(struct p54_hdr), P54_CONTROL_TYPE_DCFINIT,
1421                         GFP_ATOMIC);
1422         if (!skb)
1423                 return -ENOMEM;
1424
1425         edcf = (struct p54_edcf *)skb_put(skb, sizeof(*edcf));
1426         if (priv->use_short_slot) {
1427                 edcf->slottime = 9;
1428                 edcf->sifs = 0x10;
1429                 edcf->eofpad = 0x00;
1430         } else {
1431                 edcf->slottime = 20;
1432                 edcf->sifs = 0x0a;
1433                 edcf->eofpad = 0x06;
1434         }
1435         /* (see prism54/isl_oid.h for further details) */
1436         edcf->frameburst = cpu_to_le16(0);
1437         edcf->round_trip_delay = cpu_to_le16(0);
1438         edcf->flags = 0;
1439         memset(edcf->mapping, 0, sizeof(edcf->mapping));
1440         memcpy(edcf->queue, priv->qos_params, sizeof(edcf->queue));
1441         priv->tx(dev, skb, 1);
1442         return 0;
1443 }
1444
1445 static int p54_init_stats(struct ieee80211_hw *dev)
1446 {
1447         struct p54_common *priv = dev->priv;
1448
1449         priv->cached_stats = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL,
1450                         sizeof(struct p54_hdr) + sizeof(struct p54_statistics),
1451                         P54_CONTROL_TYPE_STAT_READBACK, GFP_KERNEL);
1452         if (!priv->cached_stats)
1453                         return -ENOMEM;
1454
1455         mod_timer(&priv->stats_timer, jiffies + HZ);
1456         return 0;
1457 }
1458
1459 static int p54_beacon_tim(struct sk_buff *skb)
1460 {
1461         /*
1462          * the good excuse for this mess is ... the firmware.
1463          * The dummy TIM MUST be at the end of the beacon frame,
1464          * because it'll be overwritten!
1465          */
1466
1467         struct ieee80211_mgmt *mgmt = (void *)skb->data;
1468         u8 *pos, *end;
1469
1470         if (skb->len <= sizeof(mgmt)) {
1471                 printk(KERN_ERR "p54: beacon is too short!\n");
1472                 return -EINVAL;
1473         }
1474
1475         pos = (u8 *)mgmt->u.beacon.variable;
1476         end = skb->data + skb->len;
1477         while (pos < end) {
1478                 if (pos + 2 + pos[1] > end) {
1479                         printk(KERN_ERR "p54: parsing beacon failed\n");
1480                         return -EINVAL;
1481                 }
1482
1483                 if (pos[0] == WLAN_EID_TIM) {
1484                         u8 dtim_len = pos[1];
1485                         u8 dtim_period = pos[3];
1486                         u8 *next = pos + 2 + dtim_len;
1487
1488                         if (dtim_len < 3) {
1489                                 printk(KERN_ERR "p54: invalid dtim len!\n");
1490                                 return -EINVAL;
1491                         }
1492                         memmove(pos, next, end - next);
1493
1494                         if (dtim_len > 3)
1495                                 skb_trim(skb, skb->len - (dtim_len - 3));
1496
1497                         pos = end - (dtim_len + 2);
1498
1499                         /* add the dummy at the end */
1500                         pos[0] = WLAN_EID_TIM;
1501                         pos[1] = 3;
1502                         pos[2] = 0;
1503                         pos[3] = dtim_period;
1504                         pos[4] = 0;
1505                         return 0;
1506                 }
1507                 pos += 2 + pos[1];
1508         }
1509         return 0;
1510 }
1511
1512 static int p54_beacon_update(struct ieee80211_hw *dev,
1513                         struct ieee80211_vif *vif)
1514 {
1515         struct p54_common *priv = dev->priv;
1516         struct sk_buff *beacon;
1517         int ret;
1518
1519         if (priv->cached_beacon) {
1520                 p54_tx_cancel(dev, priv->cached_beacon);
1521                 /* wait for the last beacon the be freed */
1522                 msleep(10);
1523         }
1524
1525         beacon = ieee80211_beacon_get(dev, vif);
1526         if (!beacon)
1527                 return -ENOMEM;
1528         ret = p54_beacon_tim(beacon);
1529         if (ret)
1530                 return ret;
1531         ret = p54_tx(dev, beacon);
1532         if (ret)
1533                 return ret;
1534         priv->cached_beacon = beacon;
1535         priv->tsf_high32 = 0;
1536         priv->tsf_low32 = 0;
1537
1538         return 0;
1539 }
1540
1541 static int p54_start(struct ieee80211_hw *dev)
1542 {
1543         struct p54_common *priv = dev->priv;
1544         int err;
1545
1546         mutex_lock(&priv->conf_mutex);
1547         err = priv->open(dev);
1548         if (err)
1549                 goto out;
1550         P54_SET_QUEUE(priv->qos_params[0], 0x0002, 0x0003, 0x0007, 47);
1551         P54_SET_QUEUE(priv->qos_params[1], 0x0002, 0x0007, 0x000f, 94);
1552         P54_SET_QUEUE(priv->qos_params[2], 0x0003, 0x000f, 0x03ff, 0);
1553         P54_SET_QUEUE(priv->qos_params[3], 0x0007, 0x000f, 0x03ff, 0);
1554         err = p54_set_edcf(dev);
1555         if (err)
1556                 goto out;
1557         err = p54_init_stats(dev);
1558         if (err)
1559                 goto out;
1560         err = p54_setup_mac(dev, P54_FILTER_TYPE_NONE, NULL);
1561         if (err)
1562                 goto out;
1563         priv->mode = NL80211_IFTYPE_MONITOR;
1564
1565 out:
1566         mutex_unlock(&priv->conf_mutex);
1567         return err;
1568 }
1569
1570 static void p54_stop(struct ieee80211_hw *dev)
1571 {
1572         struct p54_common *priv = dev->priv;
1573         struct sk_buff *skb;
1574
1575         mutex_lock(&priv->conf_mutex);
1576         del_timer(&priv->stats_timer);
1577         p54_free_skb(dev, priv->cached_stats);
1578         priv->cached_stats = NULL;
1579         if (priv->cached_beacon)
1580                 p54_tx_cancel(dev, priv->cached_beacon);
1581
1582         while ((skb = skb_dequeue(&priv->tx_queue)))
1583                 kfree_skb(skb);
1584
1585         priv->cached_beacon = NULL;
1586         priv->stop(dev);
1587         priv->tsf_high32 = priv->tsf_low32 = 0;
1588         priv->mode = NL80211_IFTYPE_UNSPECIFIED;
1589         mutex_unlock(&priv->conf_mutex);
1590 }
1591
1592 static int p54_add_interface(struct ieee80211_hw *dev,
1593                              struct ieee80211_if_init_conf *conf)
1594 {
1595         struct p54_common *priv = dev->priv;
1596
1597         mutex_lock(&priv->conf_mutex);
1598         if (priv->mode != NL80211_IFTYPE_MONITOR) {
1599                 mutex_unlock(&priv->conf_mutex);
1600                 return -EOPNOTSUPP;
1601         }
1602
1603         switch (conf->type) {
1604         case NL80211_IFTYPE_STATION:
1605         case NL80211_IFTYPE_ADHOC:
1606         case NL80211_IFTYPE_AP:
1607         case NL80211_IFTYPE_MESH_POINT:
1608                 priv->mode = conf->type;
1609                 break;
1610         default:
1611                 mutex_unlock(&priv->conf_mutex);
1612                 return -EOPNOTSUPP;
1613         }
1614
1615         memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
1616
1617         p54_setup_mac(dev, P54_FILTER_TYPE_NONE, NULL);
1618
1619         switch (conf->type) {
1620         case NL80211_IFTYPE_STATION:
1621                 p54_setup_mac(dev, P54_FILTER_TYPE_STATION, NULL);
1622                 break;
1623         case NL80211_IFTYPE_AP:
1624                 p54_setup_mac(dev, P54_FILTER_TYPE_AP, priv->mac_addr);
1625                 break;
1626         case NL80211_IFTYPE_ADHOC:
1627         case NL80211_IFTYPE_MESH_POINT:
1628                 p54_setup_mac(dev, P54_FILTER_TYPE_IBSS, NULL);
1629                 break;
1630         default:
1631                 BUG();  /* impossible */
1632                 break;
1633         }
1634
1635         p54_set_leds(dev, 1, 0, 0);
1636
1637         mutex_unlock(&priv->conf_mutex);
1638         return 0;
1639 }
1640
1641 static void p54_remove_interface(struct ieee80211_hw *dev,
1642                                  struct ieee80211_if_init_conf *conf)
1643 {
1644         struct p54_common *priv = dev->priv;
1645
1646         mutex_lock(&priv->conf_mutex);
1647         if (priv->cached_beacon)
1648                 p54_tx_cancel(dev, priv->cached_beacon);
1649         p54_setup_mac(dev, P54_FILTER_TYPE_NONE, NULL);
1650         priv->mode = NL80211_IFTYPE_MONITOR;
1651         memset(priv->mac_addr, 0, ETH_ALEN);
1652         mutex_unlock(&priv->conf_mutex);
1653 }
1654
1655 static int p54_config(struct ieee80211_hw *dev, u32 changed)
1656 {
1657         int ret;
1658         struct p54_common *priv = dev->priv;
1659         struct ieee80211_conf *conf = &dev->conf;
1660
1661         mutex_lock(&priv->conf_mutex);
1662         priv->rx_antenna = 2; /* automatic */
1663         priv->output_power = conf->power_level << 2;
1664         ret = p54_set_freq(dev, conf->channel->center_freq);
1665         if (!ret)
1666                 ret = p54_set_edcf(dev);
1667         mutex_unlock(&priv->conf_mutex);
1668         return ret;
1669 }
1670
1671 static int p54_config_interface(struct ieee80211_hw *dev,
1672                                 struct ieee80211_vif *vif,
1673                                 struct ieee80211_if_conf *conf)
1674 {
1675         struct p54_common *priv = dev->priv;
1676         int ret = 0;
1677
1678         mutex_lock(&priv->conf_mutex);
1679         switch (priv->mode) {
1680         case NL80211_IFTYPE_STATION:
1681                 ret = p54_setup_mac(dev, P54_FILTER_TYPE_STATION, conf->bssid);
1682                 if (ret)
1683                         goto out;
1684                 ret = p54_set_leds(dev, 1,
1685                                    !is_multicast_ether_addr(conf->bssid), 0);
1686                 if (ret)
1687                         goto out;
1688                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
1689                 break;
1690         case NL80211_IFTYPE_AP:
1691         case NL80211_IFTYPE_ADHOC:
1692         case NL80211_IFTYPE_MESH_POINT:
1693                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
1694                 ret = p54_set_freq(dev, dev->conf.channel->center_freq);
1695                 if (ret)
1696                         goto out;
1697                 ret = p54_setup_mac(dev, priv->mac_mode, priv->bssid);
1698                 if (ret)
1699                         goto out;
1700                 if (conf->changed & IEEE80211_IFCC_BEACON) {
1701                         ret = p54_beacon_update(dev, vif);
1702                         if (ret)
1703                                 goto out;
1704                         ret = p54_set_edcf(dev);
1705                         if (ret)
1706                                 goto out;
1707                 }
1708         }
1709 out:
1710         mutex_unlock(&priv->conf_mutex);
1711         return ret;
1712 }
1713
1714 static void p54_configure_filter(struct ieee80211_hw *dev,
1715                                  unsigned int changed_flags,
1716                                  unsigned int *total_flags,
1717                                  int mc_count, struct dev_mc_list *mclist)
1718 {
1719         struct p54_common *priv = dev->priv;
1720
1721         *total_flags &= FIF_BCN_PRBRESP_PROMISC |
1722                         FIF_PROMISC_IN_BSS |
1723                         FIF_FCSFAIL;
1724
1725         priv->filter_flags = *total_flags;
1726
1727         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
1728                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
1729                         p54_setup_mac(dev, priv->mac_mode, NULL);
1730                 else
1731                         p54_setup_mac(dev, priv->mac_mode, priv->bssid);
1732         }
1733
1734         if (changed_flags & FIF_PROMISC_IN_BSS) {
1735                 if (*total_flags & FIF_PROMISC_IN_BSS)
1736                         p54_setup_mac(dev, priv->mac_mode | 0x8, NULL);
1737                 else
1738                         p54_setup_mac(dev, priv->mac_mode & ~0x8, priv->bssid);
1739         }
1740 }
1741
1742 static int p54_conf_tx(struct ieee80211_hw *dev, u16 queue,
1743                        const struct ieee80211_tx_queue_params *params)
1744 {
1745         struct p54_common *priv = dev->priv;
1746         int ret;
1747
1748         mutex_lock(&priv->conf_mutex);
1749         if ((params) && !(queue > 4)) {
1750                 P54_SET_QUEUE(priv->qos_params[queue], params->aifs,
1751                         params->cw_min, params->cw_max, params->txop);
1752                 ret = p54_set_edcf(dev);
1753         } else
1754                 ret = -EINVAL;
1755         mutex_unlock(&priv->conf_mutex);
1756         return ret;
1757 }
1758
1759 static int p54_init_xbow_synth(struct ieee80211_hw *dev)
1760 {
1761         struct p54_common *priv = dev->priv;
1762         struct sk_buff *skb;
1763         struct p54_xbow_synth *xbow;
1764
1765         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*xbow) +
1766                             sizeof(struct p54_hdr),
1767                             P54_CONTROL_TYPE_XBOW_SYNTH_CFG,
1768                             GFP_KERNEL);
1769         if (!skb)
1770                 return -ENOMEM;
1771
1772         xbow = (struct p54_xbow_synth *)skb_put(skb, sizeof(*xbow));
1773         xbow->magic1 = cpu_to_le16(0x1);
1774         xbow->magic2 = cpu_to_le16(0x2);
1775         xbow->freq = cpu_to_le16(5390);
1776         memset(xbow->padding, 0, sizeof(xbow->padding));
1777         priv->tx(dev, skb, 1);
1778         return 0;
1779 }
1780
1781 static void p54_statistics_timer(unsigned long data)
1782 {
1783         struct ieee80211_hw *dev = (struct ieee80211_hw *) data;
1784         struct p54_common *priv = dev->priv;
1785
1786         BUG_ON(!priv->cached_stats);
1787
1788         priv->tx(dev, priv->cached_stats, 0);
1789 }
1790
1791 static int p54_get_stats(struct ieee80211_hw *dev,
1792                          struct ieee80211_low_level_stats *stats)
1793 {
1794         struct p54_common *priv = dev->priv;
1795
1796         del_timer(&priv->stats_timer);
1797         p54_statistics_timer((unsigned long)dev);
1798
1799         if (!wait_for_completion_interruptible_timeout(&priv->stats_comp, HZ)) {
1800                 printk(KERN_ERR "%s: device does not respond!\n",
1801                         wiphy_name(dev->wiphy));
1802                 return -EBUSY;
1803         }
1804
1805         memcpy(stats, &priv->stats, sizeof(*stats));
1806
1807         return 0;
1808 }
1809
1810 static int p54_get_tx_stats(struct ieee80211_hw *dev,
1811                             struct ieee80211_tx_queue_stats *stats)
1812 {
1813         struct p54_common *priv = dev->priv;
1814
1815         memcpy(stats, &priv->tx_stats[4], sizeof(stats[0]) * dev->queues);
1816
1817         return 0;
1818 }
1819
1820 static void p54_bss_info_changed(struct ieee80211_hw *dev,
1821                                  struct ieee80211_vif *vif,
1822                                  struct ieee80211_bss_conf *info,
1823                                  u32 changed)
1824 {
1825         struct p54_common *priv = dev->priv;
1826
1827         if (changed & BSS_CHANGED_ERP_SLOT) {
1828                 priv->use_short_slot = info->use_short_slot;
1829                 p54_set_edcf(dev);
1830         }
1831         if (changed & BSS_CHANGED_BASIC_RATES) {
1832                 if (dev->conf.channel->band == IEEE80211_BAND_5GHZ)
1833                         priv->basic_rate_mask = (info->basic_rates << 4);
1834                 else
1835                         priv->basic_rate_mask = info->basic_rates;
1836                 p54_setup_mac(dev, priv->mac_mode, priv->bssid);
1837                 if (priv->fw_var >= 0x500)
1838                         p54_set_freq(dev, dev->conf.channel->center_freq);
1839         }
1840         if (changed & BSS_CHANGED_ASSOC) {
1841                 if (info->assoc) {
1842                         priv->aid = info->aid;
1843                         priv->wakeup_timer = info->beacon_int *
1844                                              info->dtim_period * 5;
1845                         p54_setup_mac(dev, priv->mac_mode, priv->bssid);
1846                 }
1847         }
1848
1849 }
1850
1851 static const struct ieee80211_ops p54_ops = {
1852         .tx                     = p54_tx,
1853         .start                  = p54_start,
1854         .stop                   = p54_stop,
1855         .add_interface          = p54_add_interface,
1856         .remove_interface       = p54_remove_interface,
1857         .set_tim                = p54_set_tim,
1858         .sta_notify_ps          = p54_sta_notify_ps,
1859         .sta_notify             = p54_sta_notify,
1860         .config                 = p54_config,
1861         .config_interface       = p54_config_interface,
1862         .bss_info_changed       = p54_bss_info_changed,
1863         .configure_filter       = p54_configure_filter,
1864         .conf_tx                = p54_conf_tx,
1865         .get_stats              = p54_get_stats,
1866         .get_tx_stats           = p54_get_tx_stats
1867 };
1868
1869 struct ieee80211_hw *p54_init_common(size_t priv_data_len)
1870 {
1871         struct ieee80211_hw *dev;
1872         struct p54_common *priv;
1873
1874         dev = ieee80211_alloc_hw(priv_data_len, &p54_ops);
1875         if (!dev)
1876                 return NULL;
1877
1878         priv = dev->priv;
1879         priv->mode = NL80211_IFTYPE_UNSPECIFIED;
1880         priv->basic_rate_mask = 0x15f;
1881         skb_queue_head_init(&priv->tx_queue);
1882         dev->flags = IEEE80211_HW_RX_INCLUDES_FCS |
1883                      IEEE80211_HW_SIGNAL_DBM |
1884                      IEEE80211_HW_NOISE_DBM;
1885
1886         dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1887                                       BIT(NL80211_IFTYPE_ADHOC) |
1888                                       BIT(NL80211_IFTYPE_AP) |
1889                                       BIT(NL80211_IFTYPE_MESH_POINT);
1890
1891         dev->channel_change_time = 1000;        /* TODO: find actual value */
1892         priv->tx_stats[0].limit = 1;            /* Beacon queue */
1893         priv->tx_stats[1].limit = 1;            /* Probe queue for HW scan */
1894         priv->tx_stats[2].limit = 3;            /* queue for MLMEs */
1895         priv->tx_stats[3].limit = 3;            /* Broadcast / MC queue */
1896         priv->tx_stats[4].limit = 5;            /* Data */
1897         dev->queues = 1;
1898         priv->noise = -94;
1899         /*
1900          * We support at most 8 tries no matter which rate they're at,
1901          * we cannot support max_rates * max_rate_tries as we set it
1902          * here, but setting it correctly to 4/2 or so would limit us
1903          * artificially if the RC algorithm wants just two rates, so
1904          * let's say 4/7, we'll redistribute it at TX time, see the
1905          * comments there.
1906          */
1907         dev->max_rates = 4;
1908         dev->max_rate_tries = 7;
1909         dev->extra_tx_headroom = sizeof(struct p54_hdr) + 4 +
1910                                  sizeof(struct p54_tx_data);
1911
1912         mutex_init(&priv->conf_mutex);
1913         init_completion(&priv->eeprom_comp);
1914         init_completion(&priv->stats_comp);
1915         setup_timer(&priv->stats_timer, p54_statistics_timer,
1916                 (unsigned long)dev);
1917
1918         return dev;
1919 }
1920 EXPORT_SYMBOL_GPL(p54_init_common);
1921
1922 void p54_free_common(struct ieee80211_hw *dev)
1923 {
1924         struct p54_common *priv = dev->priv;
1925         del_timer(&priv->stats_timer);
1926         kfree_skb(priv->cached_stats);
1927         kfree(priv->iq_autocal);
1928         kfree(priv->output_limit);
1929         kfree(priv->curve_data);
1930 }
1931 EXPORT_SYMBOL_GPL(p54_free_common);
1932
1933 static int __init p54_init(void)
1934 {
1935         return 0;
1936 }
1937
1938 static void __exit p54_exit(void)
1939 {
1940 }
1941
1942 module_init(p54_init);
1943 module_exit(p54_exit);