Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
[linux-2.6] / drivers / net / wireless / 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 void p54_parse_firmware(struct ieee80211_hw *dev, const struct firmware *fw)
31 {
32         struct p54_common *priv = dev->priv;
33         struct bootrec_exp_if *exp_if;
34         struct bootrec *bootrec;
35         u32 *data = (u32 *)fw->data;
36         u32 *end_data = (u32 *)fw->data + (fw->size >> 2);
37         u8 *fw_version = NULL;
38         size_t len;
39         int i;
40
41         if (priv->rx_start)
42                 return;
43
44         while (data < end_data && *data)
45                 data++;
46
47         while (data < end_data && !*data)
48                 data++;
49
50         bootrec = (struct bootrec *) data;
51
52         while (bootrec->data <= end_data &&
53                (bootrec->data + (len = le32_to_cpu(bootrec->len))) <= end_data) {
54                 u32 code = le32_to_cpu(bootrec->code);
55                 switch (code) {
56                 case BR_CODE_COMPONENT_ID:
57                         switch (be32_to_cpu(*(__be32 *)bootrec->data)) {
58                         case FW_FMAC:
59                                 printk(KERN_INFO "p54: FreeMAC firmware\n");
60                                 break;
61                         case FW_LM20:
62                                 printk(KERN_INFO "p54: LM20 firmware\n");
63                                 break;
64                         case FW_LM86:
65                                 printk(KERN_INFO "p54: LM86 firmware\n");
66                                 break;
67                         case FW_LM87:
68                                 printk(KERN_INFO "p54: LM87 firmware - not supported yet!\n");
69                                 break;
70                         default:
71                                 printk(KERN_INFO "p54: unknown firmware\n");
72                                 break;
73                         }
74                         break;
75                 case BR_CODE_COMPONENT_VERSION:
76                         /* 24 bytes should be enough for all firmwares */
77                         if (strnlen((unsigned char*)bootrec->data, 24) < 24)
78                                 fw_version = (unsigned char*)bootrec->data;
79                         break;
80                 case BR_CODE_DESCR:
81                         priv->rx_start = le32_to_cpu(((__le32 *)bootrec->data)[1]);
82                         /* FIXME add sanity checking */
83                         priv->rx_end = le32_to_cpu(((__le32 *)bootrec->data)[2]) - 0x3500;
84                         break;
85                 case BR_CODE_EXPOSED_IF:
86                         exp_if = (struct bootrec_exp_if *) bootrec->data;
87                         for (i = 0; i < (len * sizeof(*exp_if) / 4); i++)
88                                 if (exp_if[i].if_id == cpu_to_le16(0x1a))
89                                         priv->fw_var = le16_to_cpu(exp_if[i].variant);
90                         break;
91                 case BR_CODE_DEPENDENT_IF:
92                         break;
93                 case BR_CODE_END_OF_BRA:
94                 case LEGACY_BR_CODE_END_OF_BRA:
95                         end_data = NULL;
96                         break;
97                 default:
98                         break;
99                 }
100                 bootrec = (struct bootrec *)&bootrec->data[len];
101         }
102
103         if (fw_version)
104                 printk(KERN_INFO "p54: FW rev %s - Softmac protocol %x.%x\n",
105                         fw_version, priv->fw_var >> 8, priv->fw_var & 0xff);
106
107         if (priv->fw_var >= 0x300) {
108                 /* Firmware supports QoS, use it! */
109                 priv->tx_stats.data[0].limit = 3;
110                 priv->tx_stats.data[1].limit = 4;
111                 priv->tx_stats.data[2].limit = 3;
112                 priv->tx_stats.data[3].limit = 1;
113                 dev->queues = 4;
114         }
115 }
116 EXPORT_SYMBOL_GPL(p54_parse_firmware);
117
118 static int p54_convert_rev0_to_rev1(struct ieee80211_hw *dev,
119                                     struct pda_pa_curve_data *curve_data)
120 {
121         struct p54_common *priv = dev->priv;
122         struct pda_pa_curve_data_sample_rev1 *rev1;
123         struct pda_pa_curve_data_sample_rev0 *rev0;
124         size_t cd_len = sizeof(*curve_data) +
125                 (curve_data->points_per_channel*sizeof(*rev1) + 2) *
126                  curve_data->channels;
127         unsigned int i, j;
128         void *source, *target;
129
130         priv->curve_data = kmalloc(cd_len, GFP_KERNEL);
131         if (!priv->curve_data)
132                 return -ENOMEM;
133
134         memcpy(priv->curve_data, curve_data, sizeof(*curve_data));
135         source = curve_data->data;
136         target = priv->curve_data->data;
137         for (i = 0; i < curve_data->channels; i++) {
138                 __le16 *freq = source;
139                 source += sizeof(__le16);
140                 *((__le16 *)target) = *freq;
141                 target += sizeof(__le16);
142                 for (j = 0; j < curve_data->points_per_channel; j++) {
143                         rev1 = target;
144                         rev0 = source;
145
146                         rev1->rf_power = rev0->rf_power;
147                         rev1->pa_detector = rev0->pa_detector;
148                         rev1->data_64qam = rev0->pcv;
149                         /* "invent" the points for the other modulations */
150 #define SUB(x,y) (u8)((x) - (y)) > (x) ? 0 : (x) - (y)
151                         rev1->data_16qam = SUB(rev0->pcv, 12);
152                         rev1->data_qpsk  = SUB(rev1->data_16qam, 12);
153                         rev1->data_bpsk  = SUB(rev1->data_qpsk, 12);
154                         rev1->data_barker= SUB(rev1->data_bpsk, 14);
155 #undef SUB
156                         target += sizeof(*rev1);
157                         source += sizeof(*rev0);
158                 }
159         }
160
161         return 0;
162 }
163
164 int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
165 {
166         struct p54_common *priv = dev->priv;
167         struct eeprom_pda_wrap *wrap = NULL;
168         struct pda_entry *entry;
169         unsigned int data_len, entry_len;
170         void *tmp;
171         int err;
172         u8 *end = (u8 *)eeprom + len;
173
174         wrap = (struct eeprom_pda_wrap *) eeprom;
175         entry = (void *)wrap->data + le16_to_cpu(wrap->len);
176
177         /* verify that at least the entry length/code fits */
178         while ((u8 *)entry <= end - sizeof(*entry)) {
179                 entry_len = le16_to_cpu(entry->len);
180                 data_len = ((entry_len - 1) << 1);
181
182                 /* abort if entry exceeds whole structure */
183                 if ((u8 *)entry + sizeof(*entry) + data_len > end)
184                         break;
185
186                 switch (le16_to_cpu(entry->code)) {
187                 case PDR_MAC_ADDRESS:
188                         SET_IEEE80211_PERM_ADDR(dev, entry->data);
189                         break;
190                 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS:
191                         if (data_len < 2) {
192                                 err = -EINVAL;
193                                 goto err;
194                         }
195
196                         if (2 + entry->data[1]*sizeof(*priv->output_limit) > data_len) {
197                                 err = -EINVAL;
198                                 goto err;
199                         }
200
201                         priv->output_limit = kmalloc(entry->data[1] *
202                                 sizeof(*priv->output_limit), GFP_KERNEL);
203
204                         if (!priv->output_limit) {
205                                 err = -ENOMEM;
206                                 goto err;
207                         }
208
209                         memcpy(priv->output_limit, &entry->data[2],
210                                entry->data[1]*sizeof(*priv->output_limit));
211                         priv->output_limit_len = entry->data[1];
212                         break;
213                 case PDR_PRISM_PA_CAL_CURVE_DATA:
214                         if (data_len < sizeof(struct pda_pa_curve_data)) {
215                                 err = -EINVAL;
216                                 goto err;
217                         }
218
219                         if (((struct pda_pa_curve_data *)entry->data)->cal_method_rev) {
220                                 priv->curve_data = kmalloc(data_len, GFP_KERNEL);
221                                 if (!priv->curve_data) {
222                                         err = -ENOMEM;
223                                         goto err;
224                                 }
225
226                                 memcpy(priv->curve_data, entry->data, data_len);
227                         } else {
228                                 err = p54_convert_rev0_to_rev1(dev, (struct pda_pa_curve_data *)entry->data);
229                                 if (err)
230                                         goto err;
231                         }
232
233                         break;
234                 case PDR_PRISM_ZIF_TX_IQ_CALIBRATION:
235                         priv->iq_autocal = kmalloc(data_len, GFP_KERNEL);
236                         if (!priv->iq_autocal) {
237                                 err = -ENOMEM;
238                                 goto err;
239                         }
240
241                         memcpy(priv->iq_autocal, entry->data, data_len);
242                         priv->iq_autocal_len = data_len / sizeof(struct pda_iq_autocal_entry);
243                         break;
244                 case PDR_INTERFACE_LIST:
245                         tmp = entry->data;
246                         while ((u8 *)tmp < entry->data + data_len) {
247                                 struct bootrec_exp_if *exp_if = tmp;
248                                 if (le16_to_cpu(exp_if->if_id) == 0xF)
249                                         priv->rxhw = exp_if->variant & cpu_to_le16(0x07);
250                                 tmp += sizeof(struct bootrec_exp_if);
251                         }
252                         break;
253                 case PDR_HARDWARE_PLATFORM_COMPONENT_ID:
254                         priv->version = *(u8 *)(entry->data + 1);
255                         break;
256                 case PDR_END:
257                         /* make it overrun */
258                         entry_len = len;
259                         break;
260                 }
261
262                 entry = (void *)entry + (entry_len + 1)*2;
263         }
264
265         if (!priv->iq_autocal || !priv->output_limit || !priv->curve_data) {
266                 printk(KERN_ERR "p54: not all required entries found in eeprom!\n");
267                 err = -EINVAL;
268                 goto err;
269         }
270
271         return 0;
272
273   err:
274         if (priv->iq_autocal) {
275                 kfree(priv->iq_autocal);
276                 priv->iq_autocal = NULL;
277         }
278
279         if (priv->output_limit) {
280                 kfree(priv->output_limit);
281                 priv->output_limit = NULL;
282         }
283
284         if (priv->curve_data) {
285                 kfree(priv->curve_data);
286                 priv->curve_data = NULL;
287         }
288
289         printk(KERN_ERR "p54: eeprom parse failed!\n");
290         return err;
291 }
292 EXPORT_SYMBOL_GPL(p54_parse_eeprom);
293
294 void p54_fill_eeprom_readback(struct p54_control_hdr *hdr)
295 {
296         struct p54_eeprom_lm86 *eeprom_hdr;
297
298         hdr->magic1 = cpu_to_le16(0x8000);
299         hdr->len = cpu_to_le16(sizeof(*eeprom_hdr) + 0x2000);
300         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_EEPROM_READBACK);
301         hdr->retry1 = hdr->retry2 = 0;
302         eeprom_hdr = (struct p54_eeprom_lm86 *) hdr->data;
303         eeprom_hdr->offset = 0x0;
304         eeprom_hdr->len = cpu_to_le16(0x2000);
305 }
306 EXPORT_SYMBOL_GPL(p54_fill_eeprom_readback);
307
308 static void p54_rx_data(struct ieee80211_hw *dev, struct sk_buff *skb)
309 {
310         struct p54_rx_hdr *hdr = (struct p54_rx_hdr *) skb->data;
311         struct ieee80211_rx_status rx_status = {0};
312         u16 freq = le16_to_cpu(hdr->freq);
313
314         rx_status.ssi = hdr->rssi;
315         rx_status.rate = hdr->rate & 0x1f; /* report short preambles & CCK too */
316         rx_status.channel = freq == 2484 ? 14 : (freq - 2407)/5;
317         rx_status.freq = freq;
318         rx_status.phymode = MODE_IEEE80211G;
319         rx_status.antenna = hdr->antenna;
320         rx_status.mactime = le64_to_cpu(hdr->timestamp);
321         rx_status.flag |= RX_FLAG_TSFT;
322
323         skb_pull(skb, sizeof(*hdr));
324         skb_trim(skb, le16_to_cpu(hdr->len));
325
326         ieee80211_rx_irqsafe(dev, skb, &rx_status);
327 }
328
329 static void inline p54_wake_free_queues(struct ieee80211_hw *dev)
330 {
331         struct p54_common *priv = dev->priv;
332         int i;
333
334         /* ieee80211_start_queues is great if all queues are really empty.
335          * But, what if some are full? */
336
337         for (i = 0; i < dev->queues; i++)
338                 if (priv->tx_stats.data[i].len < priv->tx_stats.data[i].limit)
339                         ieee80211_wake_queue(dev, i);
340 }
341
342 static void p54_rx_frame_sent(struct ieee80211_hw *dev, struct sk_buff *skb)
343 {
344         struct p54_common *priv = dev->priv;
345         struct p54_control_hdr *hdr = (struct p54_control_hdr *) skb->data;
346         struct p54_frame_sent_hdr *payload = (struct p54_frame_sent_hdr *) hdr->data;
347         struct sk_buff *entry = (struct sk_buff *) priv->tx_queue.next;
348         u32 addr = le32_to_cpu(hdr->req_id) - 0x70;
349         struct memrecord *range = NULL;
350         u32 freed = 0;
351         u32 last_addr = priv->rx_start;
352
353         while (entry != (struct sk_buff *)&priv->tx_queue) {
354                 range = (struct memrecord *)&entry->cb;
355                 if (range->start_addr == addr) {
356                         struct ieee80211_tx_status status = {{0}};
357                         struct p54_control_hdr *entry_hdr;
358                         struct p54_tx_control_allocdata *entry_data;
359                         int pad = 0;
360
361                         if (entry->next != (struct sk_buff *)&priv->tx_queue)
362                                 freed = ((struct memrecord *)&entry->next->cb)->start_addr - last_addr;
363                         else
364                                 freed = priv->rx_end - last_addr;
365
366                         last_addr = range->end_addr;
367                         __skb_unlink(entry, &priv->tx_queue);
368                         if (!range->control) {
369                                 kfree_skb(entry);
370                                 break;
371                         }
372                         memcpy(&status.control, range->control,
373                                sizeof(status.control));
374                         kfree(range->control);
375                         priv->tx_stats.data[status.control.queue].len--;
376
377                         entry_hdr = (struct p54_control_hdr *) entry->data;
378                         entry_data = (struct p54_tx_control_allocdata *) entry_hdr->data;
379                         if ((entry_hdr->magic1 & cpu_to_le16(0x4000)) != 0)
380                                 pad = entry_data->align[0];
381
382                         if (!(status.control.flags & IEEE80211_TXCTL_NO_ACK)) {
383                                 if (!(payload->status & 0x01))
384                                         status.flags |= IEEE80211_TX_STATUS_ACK;
385                                 else
386                                         status.excessive_retries = 1;
387                         }
388                         status.retry_count = payload->retries - 1;
389                         status.ack_signal = le16_to_cpu(payload->ack_rssi);
390                         skb_pull(entry, sizeof(*hdr) + pad + sizeof(*entry_data));
391                         ieee80211_tx_status_irqsafe(dev, entry, &status);
392                         break;
393                 } else
394                         last_addr = range->end_addr;
395                 entry = entry->next;
396         }
397
398         if (freed >= IEEE80211_MAX_RTS_THRESHOLD + 0x170 +
399             sizeof(struct p54_control_hdr))
400                 p54_wake_free_queues(dev);
401 }
402
403 static void p54_rx_control(struct ieee80211_hw *dev, struct sk_buff *skb)
404 {
405         struct p54_control_hdr *hdr = (struct p54_control_hdr *) skb->data;
406
407         switch (le16_to_cpu(hdr->type)) {
408         case P54_CONTROL_TYPE_TXDONE:
409                 p54_rx_frame_sent(dev, skb);
410                 break;
411         case P54_CONTROL_TYPE_BBP:
412                 break;
413         default:
414                 printk(KERN_DEBUG "%s: not handling 0x%02x type control frame\n",
415                        wiphy_name(dev->wiphy), le16_to_cpu(hdr->type));
416                 break;
417         }
418 }
419
420 /* returns zero if skb can be reused */
421 int p54_rx(struct ieee80211_hw *dev, struct sk_buff *skb)
422 {
423         u8 type = le16_to_cpu(*((__le16 *)skb->data)) >> 8;
424         switch (type) {
425         case 0x00:
426         case 0x01:
427                 p54_rx_data(dev, skb);
428                 return -1;
429         case 0x4d:
430                 /* TODO: do something better... but then again, I've never seen this happen */
431                 printk(KERN_ERR "%s: Received fault. Probably need to restart hardware now..\n",
432                        wiphy_name(dev->wiphy));
433                 break;
434         case 0x80:
435                 p54_rx_control(dev, skb);
436                 break;
437         default:
438                 printk(KERN_ERR "%s: unknown frame RXed (0x%02x)\n",
439                        wiphy_name(dev->wiphy), type);
440                 break;
441         }
442         return 0;
443 }
444 EXPORT_SYMBOL_GPL(p54_rx);
445
446 /*
447  * So, the firmware is somewhat stupid and doesn't know what places in its
448  * memory incoming data should go to. By poking around in the firmware, we
449  * can find some unused memory to upload our packets to. However, data that we
450  * want the card to TX needs to stay intact until the card has told us that
451  * it is done with it. This function finds empty places we can upload to and
452  * marks allocated areas as reserved if necessary. p54_rx_frame_sent frees
453  * allocated areas.
454  */
455 static void p54_assign_address(struct ieee80211_hw *dev, struct sk_buff *skb,
456                                struct p54_control_hdr *data, u32 len,
457                                struct ieee80211_tx_control *control)
458 {
459         struct p54_common *priv = dev->priv;
460         struct sk_buff *entry = priv->tx_queue.next;
461         struct sk_buff *target_skb = NULL;
462         struct memrecord *range;
463         u32 last_addr = priv->rx_start;
464         u32 largest_hole = 0;
465         u32 target_addr = priv->rx_start;
466         unsigned long flags;
467         unsigned int left;
468         len = (len + 0x170 + 3) & ~0x3; /* 0x70 headroom, 0x100 tailroom */
469
470         spin_lock_irqsave(&priv->tx_queue.lock, flags);
471         left = skb_queue_len(&priv->tx_queue);
472         while (left--) {
473                 u32 hole_size;
474                 range = (struct memrecord *)&entry->cb;
475                 hole_size = range->start_addr - last_addr;
476                 if (!target_skb && hole_size >= len) {
477                         target_skb = entry->prev;
478                         hole_size -= len;
479                         target_addr = last_addr;
480                 }
481                 largest_hole = max(largest_hole, hole_size);
482                 last_addr = range->end_addr;
483                 entry = entry->next;
484         }
485         if (!target_skb && priv->rx_end - last_addr >= len) {
486                 target_skb = priv->tx_queue.prev;
487                 largest_hole = max(largest_hole, priv->rx_end - last_addr - len);
488                 if (!skb_queue_empty(&priv->tx_queue)) {
489                         range = (struct memrecord *)&target_skb->cb;
490                         target_addr = range->end_addr;
491                 }
492         } else
493                 largest_hole = max(largest_hole, priv->rx_end - last_addr);
494
495         if (skb) {
496                 range = (struct memrecord *)&skb->cb;
497                 range->start_addr = target_addr;
498                 range->end_addr = target_addr + len;
499                 range->control = control;
500                 __skb_queue_after(&priv->tx_queue, target_skb, skb);
501                 if (largest_hole < IEEE80211_MAX_RTS_THRESHOLD + 0x170 +
502                                    sizeof(struct p54_control_hdr))
503                         ieee80211_stop_queues(dev);
504         }
505         spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
506
507         data->req_id = cpu_to_le32(target_addr + 0x70);
508 }
509
510 static int p54_tx(struct ieee80211_hw *dev, struct sk_buff *skb,
511                   struct ieee80211_tx_control *control)
512 {
513         struct ieee80211_tx_queue_stats_data *current_queue;
514         struct p54_common *priv = dev->priv;
515         struct p54_control_hdr *hdr;
516         struct p54_tx_control_allocdata *txhdr;
517         struct ieee80211_tx_control *control_copy;
518         size_t padding, len;
519         u8 rate;
520
521         current_queue = &priv->tx_stats.data[control->queue];
522         if (unlikely(current_queue->len > current_queue->limit))
523                 return NETDEV_TX_BUSY;
524         current_queue->len++;
525         current_queue->count++;
526         if (current_queue->len == current_queue->limit)
527                 ieee80211_stop_queue(dev, control->queue);
528
529         padding = (unsigned long)(skb->data - (sizeof(*hdr) + sizeof(*txhdr))) & 3;
530         len = skb->len;
531
532         control_copy = kmalloc(sizeof(*control), GFP_ATOMIC);
533         if (control_copy)
534                 memcpy(control_copy, control, sizeof(*control));
535
536         txhdr = (struct p54_tx_control_allocdata *)
537                         skb_push(skb, sizeof(*txhdr) + padding);
538         hdr = (struct p54_control_hdr *) skb_push(skb, sizeof(*hdr));
539
540         if (padding)
541                 hdr->magic1 = cpu_to_le16(0x4010);
542         else
543                 hdr->magic1 = cpu_to_le16(0x0010);
544         hdr->len = cpu_to_le16(len);
545         hdr->type = (control->flags & IEEE80211_TXCTL_NO_ACK) ? 0 : cpu_to_le16(1);
546         hdr->retry1 = hdr->retry2 = control->retry_limit;
547         p54_assign_address(dev, skb, hdr, skb->len, control_copy);
548
549         memset(txhdr->wep_key, 0x0, 16);
550         txhdr->padding = 0;
551         txhdr->padding2 = 0;
552
553         /* TODO: add support for alternate retry TX rates */
554         rate = control->tx_rate;
555         if (control->flags & IEEE80211_TXCTL_USE_RTS_CTS)
556                 rate |= 0x40;
557         else if (control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)
558                 rate |= 0x20;
559         memset(txhdr->rateset, rate, 8);
560         txhdr->wep_key_present = 0;
561         txhdr->wep_key_len = 0;
562         txhdr->frame_type = cpu_to_le32(control->queue + 4);
563         txhdr->magic4 = 0;
564         txhdr->antenna = (control->antenna_sel_tx == 0) ?
565                 2 : control->antenna_sel_tx - 1;
566         txhdr->output_power = 0x7f; // HW Maximum
567         txhdr->magic5 = (control->flags & IEEE80211_TXCTL_NO_ACK) ?
568                 0 : ((rate > 0x3) ? cpu_to_le32(0x33) : cpu_to_le32(0x23));
569         if (padding)
570                 txhdr->align[0] = padding;
571
572         priv->tx(dev, hdr, skb->len, 0);
573         return 0;
574 }
575
576 static int p54_set_filter(struct ieee80211_hw *dev, u16 filter_type,
577                           const u8 *dst, const u8 *src, u8 antenna,
578                           u32 magic3, u32 magic8, u32 magic9)
579 {
580         struct p54_common *priv = dev->priv;
581         struct p54_control_hdr *hdr;
582         struct p54_tx_control_filter *filter;
583
584         hdr = kzalloc(sizeof(*hdr) + sizeof(*filter) +
585                       priv->tx_hdr_len, GFP_ATOMIC);
586         if (!hdr)
587                 return -ENOMEM;
588
589         hdr = (void *)hdr + priv->tx_hdr_len;
590
591         filter = (struct p54_tx_control_filter *) hdr->data;
592         hdr->magic1 = cpu_to_le16(0x8001);
593         hdr->len = cpu_to_le16(sizeof(*filter));
594         p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*filter), NULL);
595         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_FILTER_SET);
596
597         filter->filter_type = cpu_to_le16(filter_type);
598         memcpy(filter->dst, dst, ETH_ALEN);
599         if (!src)
600                 memset(filter->src, ~0, ETH_ALEN);
601         else
602                 memcpy(filter->src, src, ETH_ALEN);
603         filter->antenna = antenna;
604         filter->magic3 = cpu_to_le32(magic3);
605         filter->rx_addr = cpu_to_le32(priv->rx_end);
606         filter->max_rx = cpu_to_le16(0x0620);   /* FIXME: for usb ver 1.. maybe */
607         filter->rxhw = priv->rxhw;
608         filter->magic8 = cpu_to_le16(magic8);
609         filter->magic9 = cpu_to_le16(magic9);
610
611         priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*filter), 1);
612         return 0;
613 }
614
615 static int p54_set_freq(struct ieee80211_hw *dev, __le16 freq)
616 {
617         struct p54_common *priv = dev->priv;
618         struct p54_control_hdr *hdr;
619         struct p54_tx_control_channel *chan;
620         unsigned int i;
621         size_t payload_len = sizeof(*chan) + sizeof(u32)*2 +
622                              sizeof(*chan->curve_data) *
623                              priv->curve_data->points_per_channel;
624         void *entry;
625
626         hdr = kzalloc(sizeof(*hdr) + payload_len +
627                       priv->tx_hdr_len, GFP_KERNEL);
628         if (!hdr)
629                 return -ENOMEM;
630
631         hdr = (void *)hdr + priv->tx_hdr_len;
632
633         chan = (struct p54_tx_control_channel *) hdr->data;
634
635         hdr->magic1 = cpu_to_le16(0x8001);
636         hdr->len = cpu_to_le16(sizeof(*chan));
637         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_CHANNEL_CHANGE);
638         p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + payload_len, NULL);
639
640         chan->magic1 = cpu_to_le16(0x1);
641         chan->magic2 = cpu_to_le16(0x0);
642
643         for (i = 0; i < priv->iq_autocal_len; i++) {
644                 if (priv->iq_autocal[i].freq != freq)
645                         continue;
646
647                 memcpy(&chan->iq_autocal, &priv->iq_autocal[i],
648                        sizeof(*priv->iq_autocal));
649                 break;
650         }
651         if (i == priv->iq_autocal_len)
652                 goto err;
653
654         for (i = 0; i < priv->output_limit_len; i++) {
655                 if (priv->output_limit[i].freq != freq)
656                         continue;
657
658                 chan->val_barker = 0x38;
659                 chan->val_bpsk = priv->output_limit[i].val_bpsk;
660                 chan->val_qpsk = priv->output_limit[i].val_qpsk;
661                 chan->val_16qam = priv->output_limit[i].val_16qam;
662                 chan->val_64qam = priv->output_limit[i].val_64qam;
663                 break;
664         }
665         if (i == priv->output_limit_len)
666                 goto err;
667
668         chan->pa_points_per_curve = priv->curve_data->points_per_channel;
669
670         entry = priv->curve_data->data;
671         for (i = 0; i < priv->curve_data->channels; i++) {
672                 if (*((__le16 *)entry) != freq) {
673                         entry += sizeof(__le16);
674                         entry += sizeof(struct pda_pa_curve_data_sample_rev1) *
675                                  chan->pa_points_per_curve;
676                         continue;
677                 }
678
679                 entry += sizeof(__le16);
680                 memcpy(chan->curve_data, entry, sizeof(*chan->curve_data) *
681                        chan->pa_points_per_curve);
682                 break;
683         }
684
685         memcpy(hdr->data + payload_len - 4, &chan->val_bpsk, 4);
686
687         priv->tx(dev, hdr, sizeof(*hdr) + payload_len, 1);
688         return 0;
689
690  err:
691         printk(KERN_ERR "%s: frequency change failed\n", wiphy_name(dev->wiphy));
692         kfree(hdr);
693         return -EINVAL;
694 }
695
696 static int p54_set_leds(struct ieee80211_hw *dev, int mode, int link, int act)
697 {
698         struct p54_common *priv = dev->priv;
699         struct p54_control_hdr *hdr;
700         struct p54_tx_control_led *led;
701
702         hdr = kzalloc(sizeof(*hdr) + sizeof(*led) +
703                       priv->tx_hdr_len, GFP_KERNEL);
704         if (!hdr)
705                 return -ENOMEM;
706
707         hdr = (void *)hdr + priv->tx_hdr_len;
708         hdr->magic1 = cpu_to_le16(0x8001);
709         hdr->len = cpu_to_le16(sizeof(*led));
710         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_LED);
711         p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*led), NULL);
712
713         led = (struct p54_tx_control_led *) hdr->data;
714         led->mode = cpu_to_le16(mode);
715         led->led_permanent = cpu_to_le16(link);
716         led->led_temporary = cpu_to_le16(act);
717         led->duration = cpu_to_le16(1000);
718
719         priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*led), 1);
720
721         return 0;
722 }
723
724 #define P54_SET_QUEUE(queue, ai_fs, cw_min, cw_max, burst)      \
725 do {                                                            \
726         queue.aifs = cpu_to_le16(ai_fs);                        \
727         queue.cwmin = cpu_to_le16(cw_min);                      \
728         queue.cwmax = cpu_to_le16(cw_max);                      \
729         queue.txop = (burst == 0) ?                             \
730                 0 : cpu_to_le16((burst * 100) / 32 + 1);        \
731 } while(0)
732
733 static void p54_init_vdcf(struct ieee80211_hw *dev)
734 {
735         struct p54_common *priv = dev->priv;
736         struct p54_control_hdr *hdr;
737         struct p54_tx_control_vdcf *vdcf;
738
739         /* all USB V1 adapters need a extra headroom */
740         hdr = (void *)priv->cached_vdcf + priv->tx_hdr_len;
741         hdr->magic1 = cpu_to_le16(0x8001);
742         hdr->len = cpu_to_le16(sizeof(*vdcf));
743         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_DCFINIT);
744         hdr->req_id = cpu_to_le32(priv->rx_start);
745
746         vdcf = (struct p54_tx_control_vdcf *) hdr->data;
747
748         P54_SET_QUEUE(vdcf->queue[0], 0x0002, 0x0003, 0x0007, 0x000f);
749         P54_SET_QUEUE(vdcf->queue[1], 0x0002, 0x0007, 0x000f, 0x001e);
750         P54_SET_QUEUE(vdcf->queue[2], 0x0002, 0x000f, 0x03ff, 0x0014);
751         P54_SET_QUEUE(vdcf->queue[3], 0x0007, 0x000f, 0x03ff, 0x0000);
752 }
753
754 static void p54_set_vdcf(struct ieee80211_hw *dev)
755 {
756         struct p54_common *priv = dev->priv;
757         struct p54_control_hdr *hdr;
758         struct p54_tx_control_vdcf *vdcf;
759
760         hdr = (void *)priv->cached_vdcf + priv->tx_hdr_len;
761
762         p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*vdcf), NULL);
763
764         vdcf = (struct p54_tx_control_vdcf *) hdr->data;
765
766         if (dev->conf.flags & IEEE80211_CONF_SHORT_SLOT_TIME) {
767                 vdcf->slottime = 9;
768                 vdcf->magic1 = 0x00;
769                 vdcf->magic2 = 0x10;
770         } else {
771                 vdcf->slottime = 20;
772                 vdcf->magic1 = 0x0a;
773                 vdcf->magic2 = 0x06;
774         }
775
776         /* (see prism54/isl_oid.h for further details) */
777         vdcf->frameburst = cpu_to_le16(0);
778
779         priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*vdcf), 0);
780 }
781
782 static int p54_start(struct ieee80211_hw *dev)
783 {
784         struct p54_common *priv = dev->priv;
785         int err;
786
787         err = priv->open(dev);
788         if (!err)
789                 priv->mode = IEEE80211_IF_TYPE_MNTR;
790
791         return err;
792 }
793
794 static void p54_stop(struct ieee80211_hw *dev)
795 {
796         struct p54_common *priv = dev->priv;
797         struct sk_buff *skb;
798         while ((skb = skb_dequeue(&priv->tx_queue))) {
799                 struct memrecord *range = (struct memrecord *)&skb->cb;
800                 if (range->control)
801                         kfree(range->control);
802                 kfree_skb(skb);
803         }
804         priv->stop(dev);
805         priv->mode = IEEE80211_IF_TYPE_INVALID;
806 }
807
808 static int p54_add_interface(struct ieee80211_hw *dev,
809                              struct ieee80211_if_init_conf *conf)
810 {
811         struct p54_common *priv = dev->priv;
812
813         if (priv->mode != IEEE80211_IF_TYPE_MNTR)
814                 return -EOPNOTSUPP;
815
816         switch (conf->type) {
817         case IEEE80211_IF_TYPE_STA:
818                 priv->mode = conf->type;
819                 break;
820         default:
821                 return -EOPNOTSUPP;
822         }
823
824         memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
825
826         p54_set_filter(dev, 0, priv->mac_addr, NULL, 0, 1, 0, 0xF642);
827         p54_set_filter(dev, 0, priv->mac_addr, NULL, 1, 0, 0, 0xF642);
828
829         switch (conf->type) {
830         case IEEE80211_IF_TYPE_STA:
831                 p54_set_filter(dev, 1, priv->mac_addr, NULL, 0, 0x15F, 0x1F4, 0);
832                 break;
833         default:
834                 BUG();  /* impossible */
835                 break;
836         }
837
838         p54_set_leds(dev, 1, 0, 0);
839
840         return 0;
841 }
842
843 static void p54_remove_interface(struct ieee80211_hw *dev,
844                                  struct ieee80211_if_init_conf *conf)
845 {
846         struct p54_common *priv = dev->priv;
847         priv->mode = IEEE80211_IF_TYPE_MNTR;
848         memset(priv->mac_addr, 0, ETH_ALEN);
849         p54_set_filter(dev, 0, priv->mac_addr, NULL, 2, 0, 0, 0);
850 }
851
852 static int p54_config(struct ieee80211_hw *dev, struct ieee80211_conf *conf)
853 {
854         int ret;
855
856         ret = p54_set_freq(dev, cpu_to_le16(conf->freq));
857         p54_set_vdcf(dev);
858         return ret;
859 }
860
861 static int p54_config_interface(struct ieee80211_hw *dev,
862                                 struct ieee80211_vif *vif,
863                                 struct ieee80211_if_conf *conf)
864 {
865         struct p54_common *priv = dev->priv;
866
867         p54_set_filter(dev, 0, priv->mac_addr, conf->bssid, 0, 1, 0, 0xF642);
868         p54_set_filter(dev, 0, priv->mac_addr, conf->bssid, 2, 0, 0, 0);
869         p54_set_leds(dev, 1, !is_multicast_ether_addr(conf->bssid), 0);
870         memcpy(priv->bssid, conf->bssid, ETH_ALEN);
871         return 0;
872 }
873
874 static void p54_configure_filter(struct ieee80211_hw *dev,
875                                  unsigned int changed_flags,
876                                  unsigned int *total_flags,
877                                  int mc_count, struct dev_mc_list *mclist)
878 {
879         struct p54_common *priv = dev->priv;
880
881         *total_flags &= FIF_BCN_PRBRESP_PROMISC;
882
883         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
884                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
885                         p54_set_filter(dev, 0, priv->mac_addr,
886                                        NULL, 2, 0, 0, 0);
887                 else
888                         p54_set_filter(dev, 0, priv->mac_addr,
889                                        priv->bssid, 2, 0, 0, 0);
890         }
891 }
892
893 static int p54_conf_tx(struct ieee80211_hw *dev, int queue,
894                        const struct ieee80211_tx_queue_params *params)
895 {
896         struct p54_common *priv = dev->priv;
897         struct p54_tx_control_vdcf *vdcf;
898
899         vdcf = (struct p54_tx_control_vdcf *)(((struct p54_control_hdr *)
900                 ((void *)priv->cached_vdcf + priv->tx_hdr_len))->data);
901
902         if ((params) && !((queue < 0) || (queue > 4))) {
903                 P54_SET_QUEUE(vdcf->queue[queue], params->aifs,
904                         params->cw_min, params->cw_max, params->burst_time);
905         } else
906                 return -EINVAL;
907
908         p54_set_vdcf(dev);
909
910         return 0;
911 }
912
913 static int p54_get_stats(struct ieee80211_hw *dev,
914                          struct ieee80211_low_level_stats *stats)
915 {
916         /* TODO */
917         return 0;
918 }
919
920 static int p54_get_tx_stats(struct ieee80211_hw *dev,
921                             struct ieee80211_tx_queue_stats *stats)
922 {
923         struct p54_common *priv = dev->priv;
924         unsigned int i;
925
926         for (i = 0; i < dev->queues; i++)
927                 memcpy(&stats->data[i], &priv->tx_stats.data[i],
928                         sizeof(stats->data[i]));
929
930         return 0;
931 }
932
933 static const struct ieee80211_ops p54_ops = {
934         .tx                     = p54_tx,
935         .start                  = p54_start,
936         .stop                   = p54_stop,
937         .add_interface          = p54_add_interface,
938         .remove_interface       = p54_remove_interface,
939         .config                 = p54_config,
940         .config_interface       = p54_config_interface,
941         .configure_filter       = p54_configure_filter,
942         .conf_tx                = p54_conf_tx,
943         .get_stats              = p54_get_stats,
944         .get_tx_stats           = p54_get_tx_stats
945 };
946
947 struct ieee80211_hw *p54_init_common(size_t priv_data_len)
948 {
949         struct ieee80211_hw *dev;
950         struct p54_common *priv;
951         int i;
952
953         dev = ieee80211_alloc_hw(priv_data_len, &p54_ops);
954         if (!dev)
955                 return NULL;
956
957         priv = dev->priv;
958         priv->mode = IEEE80211_IF_TYPE_INVALID;
959         skb_queue_head_init(&priv->tx_queue);
960         memcpy(priv->channels, p54_channels, sizeof(p54_channels));
961         memcpy(priv->rates, p54_rates, sizeof(p54_rates));
962         priv->modes[1].mode = MODE_IEEE80211B;
963         priv->modes[1].num_rates = 4;
964         priv->modes[1].rates = priv->rates;
965         priv->modes[1].num_channels = ARRAY_SIZE(p54_channels);
966         priv->modes[1].channels = priv->channels;
967         priv->modes[0].mode = MODE_IEEE80211G;
968         priv->modes[0].num_rates = ARRAY_SIZE(p54_rates);
969         priv->modes[0].rates = priv->rates;
970         priv->modes[0].num_channels = ARRAY_SIZE(p54_channels);
971         priv->modes[0].channels = priv->channels;
972         dev->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING | /* not sure */
973                     IEEE80211_HW_RX_INCLUDES_FCS;
974         dev->channel_change_time = 1000;        /* TODO: find actual value */
975         dev->max_rssi = 127;
976
977         priv->tx_stats.data[0].limit = 5;
978         dev->queues = 1;
979
980         dev->extra_tx_headroom = sizeof(struct p54_control_hdr) + 4 +
981                                  sizeof(struct p54_tx_control_allocdata);
982
983         priv->cached_vdcf = kzalloc(sizeof(struct p54_tx_control_vdcf) +
984               priv->tx_hdr_len + sizeof(struct p54_control_hdr), GFP_KERNEL);
985
986         if (!priv->cached_vdcf) {
987                 ieee80211_free_hw(dev);
988                 return NULL;
989         }
990
991         p54_init_vdcf(dev);
992
993         for (i = 0; i < 2; i++) {
994                 if (ieee80211_register_hwmode(dev, &priv->modes[i])) {
995                         kfree(priv->cached_vdcf);
996                         ieee80211_free_hw(dev);
997                         return NULL;
998                 }
999         }
1000
1001         return dev;
1002 }
1003 EXPORT_SYMBOL_GPL(p54_init_common);
1004
1005 void p54_free_common(struct ieee80211_hw *dev)
1006 {
1007         struct p54_common *priv = dev->priv;
1008         kfree(priv->iq_autocal);
1009         kfree(priv->output_limit);
1010         kfree(priv->curve_data);
1011         kfree(priv->cached_vdcf);
1012 }
1013 EXPORT_SYMBOL_GPL(p54_free_common);
1014
1015 static int __init p54_init(void)
1016 {
1017         return 0;
1018 }
1019
1020 static void __exit p54_exit(void)
1021 {
1022 }
1023
1024 module_init(p54_init);
1025 module_exit(p54_exit);