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