Merge branch 'irq-fix' of git://www.modarm9.com/gitsrc/pub/people/ukleinek/linux...
[linux-2.6] / drivers / net / wireless / p54 / p54common.c
1
2 /*
3  * Common code for mac80211 Prism54 drivers
4  *
5  * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
6  * Copyright (c) 2007, Christian Lamparter <chunkeey@web.de>
7  *
8  * Based on the islsm (softmac prism54) driver, which is:
9  * Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
10  *
11  * This program is free software; you can redistribute it and/or modify
12  * it under the terms of the GNU General Public License version 2 as
13  * published by the Free Software Foundation.
14  */
15
16 #include <linux/init.h>
17 #include <linux/firmware.h>
18 #include <linux/etherdevice.h>
19
20 #include <net/mac80211.h>
21
22 #include "p54.h"
23 #include "p54common.h"
24
25 MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
26 MODULE_DESCRIPTION("Softmac Prism54 common code");
27 MODULE_LICENSE("GPL");
28 MODULE_ALIAS("prism54common");
29
30 static struct ieee80211_rate p54_rates[] = {
31         { .bitrate = 10, .hw_value = 0, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
32         { .bitrate = 20, .hw_value = 1, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
33         { .bitrate = 55, .hw_value = 2, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
34         { .bitrate = 110, .hw_value = 3, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
35         { .bitrate = 60, .hw_value = 4, },
36         { .bitrate = 90, .hw_value = 5, },
37         { .bitrate = 120, .hw_value = 6, },
38         { .bitrate = 180, .hw_value = 7, },
39         { .bitrate = 240, .hw_value = 8, },
40         { .bitrate = 360, .hw_value = 9, },
41         { .bitrate = 480, .hw_value = 10, },
42         { .bitrate = 540, .hw_value = 11, },
43 };
44
45 static struct ieee80211_channel p54_channels[] = {
46         { .center_freq = 2412, .hw_value = 1, },
47         { .center_freq = 2417, .hw_value = 2, },
48         { .center_freq = 2422, .hw_value = 3, },
49         { .center_freq = 2427, .hw_value = 4, },
50         { .center_freq = 2432, .hw_value = 5, },
51         { .center_freq = 2437, .hw_value = 6, },
52         { .center_freq = 2442, .hw_value = 7, },
53         { .center_freq = 2447, .hw_value = 8, },
54         { .center_freq = 2452, .hw_value = 9, },
55         { .center_freq = 2457, .hw_value = 10, },
56         { .center_freq = 2462, .hw_value = 11, },
57         { .center_freq = 2467, .hw_value = 12, },
58         { .center_freq = 2472, .hw_value = 13, },
59         { .center_freq = 2484, .hw_value = 14, },
60 };
61
62 static struct ieee80211_supported_band band_2GHz = {
63         .channels = p54_channels,
64         .n_channels = ARRAY_SIZE(p54_channels),
65         .bitrates = p54_rates,
66         .n_bitrates = ARRAY_SIZE(p54_rates),
67 };
68
69
70 void p54_parse_firmware(struct ieee80211_hw *dev, const struct firmware *fw)
71 {
72         struct p54_common *priv = dev->priv;
73         struct bootrec_exp_if *exp_if;
74         struct bootrec *bootrec;
75         u32 *data = (u32 *)fw->data;
76         u32 *end_data = (u32 *)fw->data + (fw->size >> 2);
77         u8 *fw_version = NULL;
78         size_t len;
79         int i;
80
81         if (priv->rx_start)
82                 return;
83
84         while (data < end_data && *data)
85                 data++;
86
87         while (data < end_data && !*data)
88                 data++;
89
90         bootrec = (struct bootrec *) data;
91
92         while (bootrec->data <= end_data &&
93                (bootrec->data + (len = le32_to_cpu(bootrec->len))) <= end_data) {
94                 u32 code = le32_to_cpu(bootrec->code);
95                 switch (code) {
96                 case BR_CODE_COMPONENT_ID:
97                         switch (be32_to_cpu(*(__be32 *)bootrec->data)) {
98                         case FW_FMAC:
99                                 printk(KERN_INFO "p54: FreeMAC firmware\n");
100                                 break;
101                         case FW_LM20:
102                                 printk(KERN_INFO "p54: LM20 firmware\n");
103                                 break;
104                         case FW_LM86:
105                                 printk(KERN_INFO "p54: LM86 firmware\n");
106                                 break;
107                         case FW_LM87:
108                                 printk(KERN_INFO "p54: LM87 firmware - not supported yet!\n");
109                                 break;
110                         default:
111                                 printk(KERN_INFO "p54: unknown firmware\n");
112                                 break;
113                         }
114                         break;
115                 case BR_CODE_COMPONENT_VERSION:
116                         /* 24 bytes should be enough for all firmwares */
117                         if (strnlen((unsigned char*)bootrec->data, 24) < 24)
118                                 fw_version = (unsigned char*)bootrec->data;
119                         break;
120                 case BR_CODE_DESCR:
121                         priv->rx_start = le32_to_cpu(((__le32 *)bootrec->data)[1]);
122                         /* FIXME add sanity checking */
123                         priv->rx_end = le32_to_cpu(((__le32 *)bootrec->data)[2]) - 0x3500;
124                         break;
125                 case BR_CODE_EXPOSED_IF:
126                         exp_if = (struct bootrec_exp_if *) bootrec->data;
127                         for (i = 0; i < (len * sizeof(*exp_if) / 4); i++)
128                                 if (exp_if[i].if_id == cpu_to_le16(0x1a))
129                                         priv->fw_var = le16_to_cpu(exp_if[i].variant);
130                         break;
131                 case BR_CODE_DEPENDENT_IF:
132                         break;
133                 case BR_CODE_END_OF_BRA:
134                 case LEGACY_BR_CODE_END_OF_BRA:
135                         end_data = NULL;
136                         break;
137                 default:
138                         break;
139                 }
140                 bootrec = (struct bootrec *)&bootrec->data[len];
141         }
142
143         if (fw_version)
144                 printk(KERN_INFO "p54: FW rev %s - Softmac protocol %x.%x\n",
145                         fw_version, priv->fw_var >> 8, priv->fw_var & 0xff);
146
147         if (priv->fw_var >= 0x300) {
148                 /* Firmware supports QoS, use it! */
149                 priv->tx_stats.data[0].limit = 3;
150                 priv->tx_stats.data[1].limit = 4;
151                 priv->tx_stats.data[2].limit = 3;
152                 priv->tx_stats.data[3].limit = 1;
153                 dev->queues = 4;
154         }
155 }
156 EXPORT_SYMBOL_GPL(p54_parse_firmware);
157
158 static int p54_convert_rev0_to_rev1(struct ieee80211_hw *dev,
159                                     struct pda_pa_curve_data *curve_data)
160 {
161         struct p54_common *priv = dev->priv;
162         struct pda_pa_curve_data_sample_rev1 *rev1;
163         struct pda_pa_curve_data_sample_rev0 *rev0;
164         size_t cd_len = sizeof(*curve_data) +
165                 (curve_data->points_per_channel*sizeof(*rev1) + 2) *
166                  curve_data->channels;
167         unsigned int i, j;
168         void *source, *target;
169
170         priv->curve_data = kmalloc(cd_len, GFP_KERNEL);
171         if (!priv->curve_data)
172                 return -ENOMEM;
173
174         memcpy(priv->curve_data, curve_data, sizeof(*curve_data));
175         source = curve_data->data;
176         target = priv->curve_data->data;
177         for (i = 0; i < curve_data->channels; i++) {
178                 __le16 *freq = source;
179                 source += sizeof(__le16);
180                 *((__le16 *)target) = *freq;
181                 target += sizeof(__le16);
182                 for (j = 0; j < curve_data->points_per_channel; j++) {
183                         rev1 = target;
184                         rev0 = source;
185
186                         rev1->rf_power = rev0->rf_power;
187                         rev1->pa_detector = rev0->pa_detector;
188                         rev1->data_64qam = rev0->pcv;
189                         /* "invent" the points for the other modulations */
190 #define SUB(x,y) (u8)((x) - (y)) > (x) ? 0 : (x) - (y)
191                         rev1->data_16qam = SUB(rev0->pcv, 12);
192                         rev1->data_qpsk  = SUB(rev1->data_16qam, 12);
193                         rev1->data_bpsk  = SUB(rev1->data_qpsk, 12);
194                         rev1->data_barker= SUB(rev1->data_bpsk, 14);
195 #undef SUB
196                         target += sizeof(*rev1);
197                         source += sizeof(*rev0);
198                 }
199         }
200
201         return 0;
202 }
203
204 int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
205 {
206         struct p54_common *priv = dev->priv;
207         struct eeprom_pda_wrap *wrap = NULL;
208         struct pda_entry *entry;
209         unsigned int data_len, entry_len;
210         void *tmp;
211         int err;
212         u8 *end = (u8 *)eeprom + len;
213
214         wrap = (struct eeprom_pda_wrap *) eeprom;
215         entry = (void *)wrap->data + le16_to_cpu(wrap->len);
216
217         /* verify that at least the entry length/code fits */
218         while ((u8 *)entry <= end - sizeof(*entry)) {
219                 entry_len = le16_to_cpu(entry->len);
220                 data_len = ((entry_len - 1) << 1);
221
222                 /* abort if entry exceeds whole structure */
223                 if ((u8 *)entry + sizeof(*entry) + data_len > end)
224                         break;
225
226                 switch (le16_to_cpu(entry->code)) {
227                 case PDR_MAC_ADDRESS:
228                         SET_IEEE80211_PERM_ADDR(dev, entry->data);
229                         break;
230                 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS:
231                         if (data_len < 2) {
232                                 err = -EINVAL;
233                                 goto err;
234                         }
235
236                         if (2 + entry->data[1]*sizeof(*priv->output_limit) > data_len) {
237                                 err = -EINVAL;
238                                 goto err;
239                         }
240
241                         priv->output_limit = kmalloc(entry->data[1] *
242                                 sizeof(*priv->output_limit), GFP_KERNEL);
243
244                         if (!priv->output_limit) {
245                                 err = -ENOMEM;
246                                 goto err;
247                         }
248
249                         memcpy(priv->output_limit, &entry->data[2],
250                                entry->data[1]*sizeof(*priv->output_limit));
251                         priv->output_limit_len = entry->data[1];
252                         break;
253                 case PDR_PRISM_PA_CAL_CURVE_DATA:
254                         if (data_len < sizeof(struct pda_pa_curve_data)) {
255                                 err = -EINVAL;
256                                 goto err;
257                         }
258
259                         if (((struct pda_pa_curve_data *)entry->data)->cal_method_rev) {
260                                 priv->curve_data = kmalloc(data_len, GFP_KERNEL);
261                                 if (!priv->curve_data) {
262                                         err = -ENOMEM;
263                                         goto err;
264                                 }
265
266                                 memcpy(priv->curve_data, entry->data, data_len);
267                         } else {
268                                 err = p54_convert_rev0_to_rev1(dev, (struct pda_pa_curve_data *)entry->data);
269                                 if (err)
270                                         goto err;
271                         }
272
273                         break;
274                 case PDR_PRISM_ZIF_TX_IQ_CALIBRATION:
275                         priv->iq_autocal = kmalloc(data_len, GFP_KERNEL);
276                         if (!priv->iq_autocal) {
277                                 err = -ENOMEM;
278                                 goto err;
279                         }
280
281                         memcpy(priv->iq_autocal, entry->data, data_len);
282                         priv->iq_autocal_len = data_len / sizeof(struct pda_iq_autocal_entry);
283                         break;
284                 case PDR_INTERFACE_LIST:
285                         tmp = entry->data;
286                         while ((u8 *)tmp < entry->data + data_len) {
287                                 struct bootrec_exp_if *exp_if = tmp;
288                                 if (le16_to_cpu(exp_if->if_id) == 0xF)
289                                         priv->rxhw = exp_if->variant & cpu_to_le16(0x07);
290                                 tmp += sizeof(struct bootrec_exp_if);
291                         }
292                         break;
293                 case PDR_HARDWARE_PLATFORM_COMPONENT_ID:
294                         priv->version = *(u8 *)(entry->data + 1);
295                         break;
296                 case PDR_END:
297                         /* make it overrun */
298                         entry_len = len;
299                         break;
300                 default:
301                         printk(KERN_INFO "p54: unknown eeprom code : 0x%x\n",
302                                 le16_to_cpu(entry->code));
303                         break;
304                 }
305
306                 entry = (void *)entry + (entry_len + 1)*2;
307         }
308
309         if (!priv->iq_autocal || !priv->output_limit || !priv->curve_data) {
310                 printk(KERN_ERR "p54: not all required entries found in eeprom!\n");
311                 err = -EINVAL;
312                 goto err;
313         }
314
315         return 0;
316
317   err:
318         if (priv->iq_autocal) {
319                 kfree(priv->iq_autocal);
320                 priv->iq_autocal = NULL;
321         }
322
323         if (priv->output_limit) {
324                 kfree(priv->output_limit);
325                 priv->output_limit = NULL;
326         }
327
328         if (priv->curve_data) {
329                 kfree(priv->curve_data);
330                 priv->curve_data = NULL;
331         }
332
333         printk(KERN_ERR "p54: eeprom parse failed!\n");
334         return err;
335 }
336 EXPORT_SYMBOL_GPL(p54_parse_eeprom);
337
338 void p54_fill_eeprom_readback(struct p54_control_hdr *hdr)
339 {
340         struct p54_eeprom_lm86 *eeprom_hdr;
341
342         hdr->magic1 = cpu_to_le16(0x8000);
343         hdr->len = cpu_to_le16(sizeof(*eeprom_hdr) + 0x2000);
344         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_EEPROM_READBACK);
345         hdr->retry1 = hdr->retry2 = 0;
346         eeprom_hdr = (struct p54_eeprom_lm86 *) hdr->data;
347         eeprom_hdr->offset = 0x0;
348         eeprom_hdr->len = cpu_to_le16(0x2000);
349 }
350 EXPORT_SYMBOL_GPL(p54_fill_eeprom_readback);
351
352 static void p54_rx_data(struct ieee80211_hw *dev, struct sk_buff *skb)
353 {
354         struct p54_rx_hdr *hdr = (struct p54_rx_hdr *) skb->data;
355         struct ieee80211_rx_status rx_status = {0};
356         u16 freq = le16_to_cpu(hdr->freq);
357
358         rx_status.ssi = hdr->rssi;
359         /* XX correct? */
360         rx_status.rate_idx = hdr->rate & 0xf;
361         rx_status.freq = freq;
362         rx_status.band = IEEE80211_BAND_2GHZ;
363         rx_status.antenna = hdr->antenna;
364         rx_status.mactime = le64_to_cpu(hdr->timestamp);
365         rx_status.flag |= RX_FLAG_TSFT;
366
367         skb_pull(skb, sizeof(*hdr));
368         skb_trim(skb, le16_to_cpu(hdr->len));
369
370         ieee80211_rx_irqsafe(dev, skb, &rx_status);
371 }
372
373 static void inline p54_wake_free_queues(struct ieee80211_hw *dev)
374 {
375         struct p54_common *priv = dev->priv;
376         int i;
377
378         /* ieee80211_start_queues is great if all queues are really empty.
379          * But, what if some are full? */
380
381         for (i = 0; i < dev->queues; i++)
382                 if (priv->tx_stats.data[i].len < priv->tx_stats.data[i].limit)
383                         ieee80211_wake_queue(dev, i);
384 }
385
386 static void p54_rx_frame_sent(struct ieee80211_hw *dev, struct sk_buff *skb)
387 {
388         struct p54_common *priv = dev->priv;
389         struct p54_control_hdr *hdr = (struct p54_control_hdr *) skb->data;
390         struct p54_frame_sent_hdr *payload = (struct p54_frame_sent_hdr *) hdr->data;
391         struct sk_buff *entry = (struct sk_buff *) priv->tx_queue.next;
392         u32 addr = le32_to_cpu(hdr->req_id) - 0x70;
393         struct memrecord *range = NULL;
394         u32 freed = 0;
395         u32 last_addr = priv->rx_start;
396
397         while (entry != (struct sk_buff *)&priv->tx_queue) {
398                 range = (struct memrecord *)&entry->cb;
399                 if (range->start_addr == addr) {
400                         struct ieee80211_tx_status status;
401                         struct p54_control_hdr *entry_hdr;
402                         struct p54_tx_control_allocdata *entry_data;
403                         int pad = 0;
404
405                         if (entry->next != (struct sk_buff *)&priv->tx_queue)
406                                 freed = ((struct memrecord *)&entry->next->cb)->start_addr - last_addr;
407                         else
408                                 freed = priv->rx_end - last_addr;
409
410                         last_addr = range->end_addr;
411                         __skb_unlink(entry, &priv->tx_queue);
412                         if (!range->control) {
413                                 kfree_skb(entry);
414                                 break;
415                         }
416                         memset(&status, 0, sizeof(status));
417                         memcpy(&status.control, range->control,
418                                sizeof(status.control));
419                         kfree(range->control);
420                         priv->tx_stats.data[status.control.queue].len--;
421
422                         entry_hdr = (struct p54_control_hdr *) entry->data;
423                         entry_data = (struct p54_tx_control_allocdata *) entry_hdr->data;
424                         if ((entry_hdr->magic1 & cpu_to_le16(0x4000)) != 0)
425                                 pad = entry_data->align[0];
426
427                         if (!(status.control.flags & IEEE80211_TXCTL_NO_ACK)) {
428                                 if (!(payload->status & 0x01))
429                                         status.flags |= IEEE80211_TX_STATUS_ACK;
430                                 else
431                                         status.excessive_retries = 1;
432                         }
433                         status.retry_count = payload->retries - 1;
434                         status.ack_signal = le16_to_cpu(payload->ack_rssi);
435                         skb_pull(entry, sizeof(*hdr) + pad + sizeof(*entry_data));
436                         ieee80211_tx_status_irqsafe(dev, entry, &status);
437                         break;
438                 } else
439                         last_addr = range->end_addr;
440                 entry = entry->next;
441         }
442
443         if (freed >= IEEE80211_MAX_RTS_THRESHOLD + 0x170 +
444             sizeof(struct p54_control_hdr))
445                 p54_wake_free_queues(dev);
446 }
447
448 static void p54_rx_control(struct ieee80211_hw *dev, struct sk_buff *skb)
449 {
450         struct p54_control_hdr *hdr = (struct p54_control_hdr *) skb->data;
451
452         switch (le16_to_cpu(hdr->type)) {
453         case P54_CONTROL_TYPE_TXDONE:
454                 p54_rx_frame_sent(dev, skb);
455                 break;
456         case P54_CONTROL_TYPE_BBP:
457                 break;
458         default:
459                 printk(KERN_DEBUG "%s: not handling 0x%02x type control frame\n",
460                        wiphy_name(dev->wiphy), le16_to_cpu(hdr->type));
461                 break;
462         }
463 }
464
465 /* returns zero if skb can be reused */
466 int p54_rx(struct ieee80211_hw *dev, struct sk_buff *skb)
467 {
468         u8 type = le16_to_cpu(*((__le16 *)skb->data)) >> 8;
469         switch (type) {
470         case 0x00:
471         case 0x01:
472                 p54_rx_data(dev, skb);
473                 return -1;
474         case 0x4d:
475                 /* TODO: do something better... but then again, I've never seen this happen */
476                 printk(KERN_ERR "%s: Received fault. Probably need to restart hardware now..\n",
477                        wiphy_name(dev->wiphy));
478                 break;
479         case 0x80:
480                 p54_rx_control(dev, skb);
481                 break;
482         default:
483                 printk(KERN_ERR "%s: unknown frame RXed (0x%02x)\n",
484                        wiphy_name(dev->wiphy), type);
485                 break;
486         }
487         return 0;
488 }
489 EXPORT_SYMBOL_GPL(p54_rx);
490
491 /*
492  * So, the firmware is somewhat stupid and doesn't know what places in its
493  * memory incoming data should go to. By poking around in the firmware, we
494  * can find some unused memory to upload our packets to. However, data that we
495  * want the card to TX needs to stay intact until the card has told us that
496  * it is done with it. This function finds empty places we can upload to and
497  * marks allocated areas as reserved if necessary. p54_rx_frame_sent frees
498  * allocated areas.
499  */
500 static void p54_assign_address(struct ieee80211_hw *dev, struct sk_buff *skb,
501                                struct p54_control_hdr *data, u32 len,
502                                struct ieee80211_tx_control *control)
503 {
504         struct p54_common *priv = dev->priv;
505         struct sk_buff *entry = priv->tx_queue.next;
506         struct sk_buff *target_skb = NULL;
507         struct memrecord *range;
508         u32 last_addr = priv->rx_start;
509         u32 largest_hole = 0;
510         u32 target_addr = priv->rx_start;
511         unsigned long flags;
512         unsigned int left;
513         len = (len + 0x170 + 3) & ~0x3; /* 0x70 headroom, 0x100 tailroom */
514
515         spin_lock_irqsave(&priv->tx_queue.lock, flags);
516         left = skb_queue_len(&priv->tx_queue);
517         while (left--) {
518                 u32 hole_size;
519                 range = (struct memrecord *)&entry->cb;
520                 hole_size = range->start_addr - last_addr;
521                 if (!target_skb && hole_size >= len) {
522                         target_skb = entry->prev;
523                         hole_size -= len;
524                         target_addr = last_addr;
525                 }
526                 largest_hole = max(largest_hole, hole_size);
527                 last_addr = range->end_addr;
528                 entry = entry->next;
529         }
530         if (!target_skb && priv->rx_end - last_addr >= len) {
531                 target_skb = priv->tx_queue.prev;
532                 largest_hole = max(largest_hole, priv->rx_end - last_addr - len);
533                 if (!skb_queue_empty(&priv->tx_queue)) {
534                         range = (struct memrecord *)&target_skb->cb;
535                         target_addr = range->end_addr;
536                 }
537         } else
538                 largest_hole = max(largest_hole, priv->rx_end - last_addr);
539
540         if (skb) {
541                 range = (struct memrecord *)&skb->cb;
542                 range->start_addr = target_addr;
543                 range->end_addr = target_addr + len;
544                 range->control = control;
545                 __skb_queue_after(&priv->tx_queue, target_skb, skb);
546                 if (largest_hole < IEEE80211_MAX_RTS_THRESHOLD + 0x170 +
547                                    sizeof(struct p54_control_hdr))
548                         ieee80211_stop_queues(dev);
549         }
550         spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
551
552         data->req_id = cpu_to_le32(target_addr + 0x70);
553 }
554
555 static int p54_tx(struct ieee80211_hw *dev, struct sk_buff *skb,
556                   struct ieee80211_tx_control *control)
557 {
558         struct ieee80211_tx_queue_stats_data *current_queue;
559         struct p54_common *priv = dev->priv;
560         struct p54_control_hdr *hdr;
561         struct p54_tx_control_allocdata *txhdr;
562         struct ieee80211_tx_control *control_copy;
563         size_t padding, len;
564         u8 rate;
565
566         current_queue = &priv->tx_stats.data[control->queue];
567         if (unlikely(current_queue->len > current_queue->limit))
568                 return NETDEV_TX_BUSY;
569         current_queue->len++;
570         current_queue->count++;
571         if (current_queue->len == current_queue->limit)
572                 ieee80211_stop_queue(dev, control->queue);
573
574         padding = (unsigned long)(skb->data - (sizeof(*hdr) + sizeof(*txhdr))) & 3;
575         len = skb->len;
576
577         control_copy = kmalloc(sizeof(*control), GFP_ATOMIC);
578         if (control_copy)
579                 memcpy(control_copy, control, sizeof(*control));
580
581         txhdr = (struct p54_tx_control_allocdata *)
582                         skb_push(skb, sizeof(*txhdr) + padding);
583         hdr = (struct p54_control_hdr *) skb_push(skb, sizeof(*hdr));
584
585         if (padding)
586                 hdr->magic1 = cpu_to_le16(0x4010);
587         else
588                 hdr->magic1 = cpu_to_le16(0x0010);
589         hdr->len = cpu_to_le16(len);
590         hdr->type = (control->flags & IEEE80211_TXCTL_NO_ACK) ? 0 : cpu_to_le16(1);
591         hdr->retry1 = hdr->retry2 = control->retry_limit;
592         p54_assign_address(dev, skb, hdr, skb->len, control_copy);
593
594         memset(txhdr->wep_key, 0x0, 16);
595         txhdr->padding = 0;
596         txhdr->padding2 = 0;
597
598         /* TODO: add support for alternate retry TX rates */
599         rate = control->tx_rate->hw_value;
600         if (control->flags & IEEE80211_TXCTL_SHORT_PREAMBLE)
601                 rate |= 0x10;
602         if (control->flags & IEEE80211_TXCTL_USE_RTS_CTS)
603                 rate |= 0x40;
604         else if (control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)
605                 rate |= 0x20;
606         memset(txhdr->rateset, rate, 8);
607         txhdr->wep_key_present = 0;
608         txhdr->wep_key_len = 0;
609         txhdr->frame_type = cpu_to_le32(control->queue + 4);
610         txhdr->magic4 = 0;
611         txhdr->antenna = (control->antenna_sel_tx == 0) ?
612                 2 : control->antenna_sel_tx - 1;
613         txhdr->output_power = 0x7f; // HW Maximum
614         txhdr->magic5 = (control->flags & IEEE80211_TXCTL_NO_ACK) ?
615                 0 : ((rate > 0x3) ? cpu_to_le32(0x33) : cpu_to_le32(0x23));
616         if (padding)
617                 txhdr->align[0] = padding;
618
619         priv->tx(dev, hdr, skb->len, 0);
620         return 0;
621 }
622
623 static int p54_set_filter(struct ieee80211_hw *dev, u16 filter_type,
624                           const u8 *dst, const u8 *src, u8 antenna,
625                           u32 magic3, u32 magic8, u32 magic9)
626 {
627         struct p54_common *priv = dev->priv;
628         struct p54_control_hdr *hdr;
629         struct p54_tx_control_filter *filter;
630
631         hdr = kzalloc(sizeof(*hdr) + sizeof(*filter) +
632                       priv->tx_hdr_len, GFP_ATOMIC);
633         if (!hdr)
634                 return -ENOMEM;
635
636         hdr = (void *)hdr + priv->tx_hdr_len;
637
638         filter = (struct p54_tx_control_filter *) hdr->data;
639         hdr->magic1 = cpu_to_le16(0x8001);
640         hdr->len = cpu_to_le16(sizeof(*filter));
641         p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*filter), NULL);
642         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_FILTER_SET);
643
644         filter->filter_type = cpu_to_le16(filter_type);
645         memcpy(filter->dst, dst, ETH_ALEN);
646         if (!src)
647                 memset(filter->src, ~0, ETH_ALEN);
648         else
649                 memcpy(filter->src, src, ETH_ALEN);
650         filter->antenna = antenna;
651         filter->magic3 = cpu_to_le32(magic3);
652         filter->rx_addr = cpu_to_le32(priv->rx_end);
653         filter->max_rx = cpu_to_le16(0x0620);   /* FIXME: for usb ver 1.. maybe */
654         filter->rxhw = priv->rxhw;
655         filter->magic8 = cpu_to_le16(magic8);
656         filter->magic9 = cpu_to_le16(magic9);
657
658         priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*filter), 1);
659         return 0;
660 }
661
662 static int p54_set_freq(struct ieee80211_hw *dev, __le16 freq)
663 {
664         struct p54_common *priv = dev->priv;
665         struct p54_control_hdr *hdr;
666         struct p54_tx_control_channel *chan;
667         unsigned int i;
668         size_t payload_len = sizeof(*chan) + sizeof(u32)*2 +
669                              sizeof(*chan->curve_data) *
670                              priv->curve_data->points_per_channel;
671         void *entry;
672
673         hdr = kzalloc(sizeof(*hdr) + payload_len +
674                       priv->tx_hdr_len, GFP_KERNEL);
675         if (!hdr)
676                 return -ENOMEM;
677
678         hdr = (void *)hdr + priv->tx_hdr_len;
679
680         chan = (struct p54_tx_control_channel *) hdr->data;
681
682         hdr->magic1 = cpu_to_le16(0x8001);
683         hdr->len = cpu_to_le16(sizeof(*chan));
684         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_CHANNEL_CHANGE);
685         p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + payload_len, NULL);
686
687         chan->magic1 = cpu_to_le16(0x1);
688         chan->magic2 = cpu_to_le16(0x0);
689
690         for (i = 0; i < priv->iq_autocal_len; i++) {
691                 if (priv->iq_autocal[i].freq != freq)
692                         continue;
693
694                 memcpy(&chan->iq_autocal, &priv->iq_autocal[i],
695                        sizeof(*priv->iq_autocal));
696                 break;
697         }
698         if (i == priv->iq_autocal_len)
699                 goto err;
700
701         for (i = 0; i < priv->output_limit_len; i++) {
702                 if (priv->output_limit[i].freq != freq)
703                         continue;
704
705                 chan->val_barker = 0x38;
706                 chan->val_bpsk = priv->output_limit[i].val_bpsk;
707                 chan->val_qpsk = priv->output_limit[i].val_qpsk;
708                 chan->val_16qam = priv->output_limit[i].val_16qam;
709                 chan->val_64qam = priv->output_limit[i].val_64qam;
710                 break;
711         }
712         if (i == priv->output_limit_len)
713                 goto err;
714
715         chan->pa_points_per_curve = priv->curve_data->points_per_channel;
716
717         entry = priv->curve_data->data;
718         for (i = 0; i < priv->curve_data->channels; i++) {
719                 if (*((__le16 *)entry) != freq) {
720                         entry += sizeof(__le16);
721                         entry += sizeof(struct pda_pa_curve_data_sample_rev1) *
722                                  chan->pa_points_per_curve;
723                         continue;
724                 }
725
726                 entry += sizeof(__le16);
727                 memcpy(chan->curve_data, entry, sizeof(*chan->curve_data) *
728                        chan->pa_points_per_curve);
729                 break;
730         }
731
732         memcpy(hdr->data + payload_len - 4, &chan->val_bpsk, 4);
733
734         priv->tx(dev, hdr, sizeof(*hdr) + payload_len, 1);
735         return 0;
736
737  err:
738         printk(KERN_ERR "%s: frequency change failed\n", wiphy_name(dev->wiphy));
739         kfree(hdr);
740         return -EINVAL;
741 }
742
743 static int p54_set_leds(struct ieee80211_hw *dev, int mode, int link, int act)
744 {
745         struct p54_common *priv = dev->priv;
746         struct p54_control_hdr *hdr;
747         struct p54_tx_control_led *led;
748
749         hdr = kzalloc(sizeof(*hdr) + sizeof(*led) +
750                       priv->tx_hdr_len, GFP_KERNEL);
751         if (!hdr)
752                 return -ENOMEM;
753
754         hdr = (void *)hdr + priv->tx_hdr_len;
755         hdr->magic1 = cpu_to_le16(0x8001);
756         hdr->len = cpu_to_le16(sizeof(*led));
757         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_LED);
758         p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*led), NULL);
759
760         led = (struct p54_tx_control_led *) hdr->data;
761         led->mode = cpu_to_le16(mode);
762         led->led_permanent = cpu_to_le16(link);
763         led->led_temporary = cpu_to_le16(act);
764         led->duration = cpu_to_le16(1000);
765
766         priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*led), 1);
767
768         return 0;
769 }
770
771 #define P54_SET_QUEUE(queue, ai_fs, cw_min, cw_max, _txop)      \
772 do {                                                            \
773         queue.aifs = cpu_to_le16(ai_fs);                        \
774         queue.cwmin = cpu_to_le16(cw_min);                      \
775         queue.cwmax = cpu_to_le16(cw_max);                      \
776         queue.txop = cpu_to_le16(_txop);                        \
777 } while(0)
778
779 static void p54_init_vdcf(struct ieee80211_hw *dev)
780 {
781         struct p54_common *priv = dev->priv;
782         struct p54_control_hdr *hdr;
783         struct p54_tx_control_vdcf *vdcf;
784
785         /* all USB V1 adapters need a extra headroom */
786         hdr = (void *)priv->cached_vdcf + priv->tx_hdr_len;
787         hdr->magic1 = cpu_to_le16(0x8001);
788         hdr->len = cpu_to_le16(sizeof(*vdcf));
789         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_DCFINIT);
790         hdr->req_id = cpu_to_le32(priv->rx_start);
791
792         vdcf = (struct p54_tx_control_vdcf *) hdr->data;
793
794         P54_SET_QUEUE(vdcf->queue[0], 0x0002, 0x0003, 0x0007, 47);
795         P54_SET_QUEUE(vdcf->queue[1], 0x0002, 0x0007, 0x000f, 94);
796         P54_SET_QUEUE(vdcf->queue[2], 0x0003, 0x000f, 0x03ff, 0);
797         P54_SET_QUEUE(vdcf->queue[3], 0x0007, 0x000f, 0x03ff, 0);
798 }
799
800 static void p54_set_vdcf(struct ieee80211_hw *dev)
801 {
802         struct p54_common *priv = dev->priv;
803         struct p54_control_hdr *hdr;
804         struct p54_tx_control_vdcf *vdcf;
805
806         hdr = (void *)priv->cached_vdcf + priv->tx_hdr_len;
807
808         p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*vdcf), NULL);
809
810         vdcf = (struct p54_tx_control_vdcf *) hdr->data;
811
812         if (dev->conf.flags & IEEE80211_CONF_SHORT_SLOT_TIME) {
813                 vdcf->slottime = 9;
814                 vdcf->magic1 = 0x00;
815                 vdcf->magic2 = 0x10;
816         } else {
817                 vdcf->slottime = 20;
818                 vdcf->magic1 = 0x0a;
819                 vdcf->magic2 = 0x06;
820         }
821
822         /* (see prism54/isl_oid.h for further details) */
823         vdcf->frameburst = cpu_to_le16(0);
824
825         priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*vdcf), 0);
826 }
827
828 static int p54_start(struct ieee80211_hw *dev)
829 {
830         struct p54_common *priv = dev->priv;
831         int err;
832
833         err = priv->open(dev);
834         if (!err)
835                 priv->mode = IEEE80211_IF_TYPE_MNTR;
836
837         return err;
838 }
839
840 static void p54_stop(struct ieee80211_hw *dev)
841 {
842         struct p54_common *priv = dev->priv;
843         struct sk_buff *skb;
844         while ((skb = skb_dequeue(&priv->tx_queue))) {
845                 struct memrecord *range = (struct memrecord *)&skb->cb;
846                 if (range->control)
847                         kfree(range->control);
848                 kfree_skb(skb);
849         }
850         priv->stop(dev);
851         priv->mode = IEEE80211_IF_TYPE_INVALID;
852 }
853
854 static int p54_add_interface(struct ieee80211_hw *dev,
855                              struct ieee80211_if_init_conf *conf)
856 {
857         struct p54_common *priv = dev->priv;
858
859         if (priv->mode != IEEE80211_IF_TYPE_MNTR)
860                 return -EOPNOTSUPP;
861
862         switch (conf->type) {
863         case IEEE80211_IF_TYPE_STA:
864                 priv->mode = conf->type;
865                 break;
866         default:
867                 return -EOPNOTSUPP;
868         }
869
870         memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
871
872         p54_set_filter(dev, 0, priv->mac_addr, NULL, 0, 1, 0, 0xF642);
873         p54_set_filter(dev, 0, priv->mac_addr, NULL, 1, 0, 0, 0xF642);
874
875         switch (conf->type) {
876         case IEEE80211_IF_TYPE_STA:
877                 p54_set_filter(dev, 1, priv->mac_addr, NULL, 0, 0x15F, 0x1F4, 0);
878                 break;
879         default:
880                 BUG();  /* impossible */
881                 break;
882         }
883
884         p54_set_leds(dev, 1, 0, 0);
885
886         return 0;
887 }
888
889 static void p54_remove_interface(struct ieee80211_hw *dev,
890                                  struct ieee80211_if_init_conf *conf)
891 {
892         struct p54_common *priv = dev->priv;
893         priv->mode = IEEE80211_IF_TYPE_MNTR;
894         memset(priv->mac_addr, 0, ETH_ALEN);
895         p54_set_filter(dev, 0, priv->mac_addr, NULL, 2, 0, 0, 0);
896 }
897
898 static int p54_config(struct ieee80211_hw *dev, struct ieee80211_conf *conf)
899 {
900         int ret;
901
902         ret = p54_set_freq(dev, cpu_to_le16(conf->channel->center_freq));
903         p54_set_vdcf(dev);
904         return ret;
905 }
906
907 static int p54_config_interface(struct ieee80211_hw *dev,
908                                 struct ieee80211_vif *vif,
909                                 struct ieee80211_if_conf *conf)
910 {
911         struct p54_common *priv = dev->priv;
912
913         p54_set_filter(dev, 0, priv->mac_addr, conf->bssid, 0, 1, 0, 0xF642);
914         p54_set_filter(dev, 0, priv->mac_addr, conf->bssid, 2, 0, 0, 0);
915         p54_set_leds(dev, 1, !is_multicast_ether_addr(conf->bssid), 0);
916         memcpy(priv->bssid, conf->bssid, ETH_ALEN);
917         return 0;
918 }
919
920 static void p54_configure_filter(struct ieee80211_hw *dev,
921                                  unsigned int changed_flags,
922                                  unsigned int *total_flags,
923                                  int mc_count, struct dev_mc_list *mclist)
924 {
925         struct p54_common *priv = dev->priv;
926
927         *total_flags &= FIF_BCN_PRBRESP_PROMISC;
928
929         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
930                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
931                         p54_set_filter(dev, 0, priv->mac_addr,
932                                        NULL, 2, 0, 0, 0);
933                 else
934                         p54_set_filter(dev, 0, priv->mac_addr,
935                                        priv->bssid, 2, 0, 0, 0);
936         }
937 }
938
939 static int p54_conf_tx(struct ieee80211_hw *dev, int queue,
940                        const struct ieee80211_tx_queue_params *params)
941 {
942         struct p54_common *priv = dev->priv;
943         struct p54_tx_control_vdcf *vdcf;
944
945         vdcf = (struct p54_tx_control_vdcf *)(((struct p54_control_hdr *)
946                 ((void *)priv->cached_vdcf + priv->tx_hdr_len))->data);
947
948         if ((params) && !((queue < 0) || (queue > 4))) {
949                 P54_SET_QUEUE(vdcf->queue[queue], params->aifs,
950                         params->cw_min, params->cw_max, params->txop);
951         } else
952                 return -EINVAL;
953
954         p54_set_vdcf(dev);
955
956         return 0;
957 }
958
959 static int p54_get_stats(struct ieee80211_hw *dev,
960                          struct ieee80211_low_level_stats *stats)
961 {
962         /* TODO */
963         return 0;
964 }
965
966 static int p54_get_tx_stats(struct ieee80211_hw *dev,
967                             struct ieee80211_tx_queue_stats *stats)
968 {
969         struct p54_common *priv = dev->priv;
970         unsigned int i;
971
972         for (i = 0; i < dev->queues; i++)
973                 memcpy(&stats->data[i], &priv->tx_stats.data[i],
974                         sizeof(stats->data[i]));
975
976         return 0;
977 }
978
979 static const struct ieee80211_ops p54_ops = {
980         .tx                     = p54_tx,
981         .start                  = p54_start,
982         .stop                   = p54_stop,
983         .add_interface          = p54_add_interface,
984         .remove_interface       = p54_remove_interface,
985         .config                 = p54_config,
986         .config_interface       = p54_config_interface,
987         .configure_filter       = p54_configure_filter,
988         .conf_tx                = p54_conf_tx,
989         .get_stats              = p54_get_stats,
990         .get_tx_stats           = p54_get_tx_stats
991 };
992
993 struct ieee80211_hw *p54_init_common(size_t priv_data_len)
994 {
995         struct ieee80211_hw *dev;
996         struct p54_common *priv;
997
998         dev = ieee80211_alloc_hw(priv_data_len, &p54_ops);
999         if (!dev)
1000                 return NULL;
1001
1002         priv = dev->priv;
1003         priv->mode = IEEE80211_IF_TYPE_INVALID;
1004         skb_queue_head_init(&priv->tx_queue);
1005         dev->wiphy->bands[IEEE80211_BAND_2GHZ] = &band_2GHz;
1006         dev->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING | /* not sure */
1007                     IEEE80211_HW_RX_INCLUDES_FCS;
1008         dev->channel_change_time = 1000;        /* TODO: find actual value */
1009         dev->max_rssi = 127;
1010
1011         priv->tx_stats.data[0].limit = 5;
1012         dev->queues = 1;
1013
1014         dev->extra_tx_headroom = sizeof(struct p54_control_hdr) + 4 +
1015                                  sizeof(struct p54_tx_control_allocdata);
1016
1017         priv->cached_vdcf = kzalloc(sizeof(struct p54_tx_control_vdcf) +
1018               priv->tx_hdr_len + sizeof(struct p54_control_hdr), GFP_KERNEL);
1019
1020         if (!priv->cached_vdcf) {
1021                 ieee80211_free_hw(dev);
1022                 return NULL;
1023         }
1024
1025         p54_init_vdcf(dev);
1026
1027         return dev;
1028 }
1029 EXPORT_SYMBOL_GPL(p54_init_common);
1030
1031 void p54_free_common(struct ieee80211_hw *dev)
1032 {
1033         struct p54_common *priv = dev->priv;
1034         kfree(priv->iq_autocal);
1035         kfree(priv->output_limit);
1036         kfree(priv->curve_data);
1037         kfree(priv->cached_vdcf);
1038 }
1039 EXPORT_SYMBOL_GPL(p54_free_common);
1040
1041 static int __init p54_init(void)
1042 {
1043         return 0;
1044 }
1045
1046 static void __exit p54_exit(void)
1047 {
1048 }
1049
1050 module_init(p54_init);
1051 module_exit(p54_exit);