Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/linville/wireles...
[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         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         rx_status.flag |= RX_FLAG_TSFT;
318
319         skb_pull(skb, sizeof(*hdr));
320         skb_trim(skb, le16_to_cpu(hdr->len));
321
322         ieee80211_rx_irqsafe(dev, skb, &rx_status);
323 }
324
325 static void inline p54_wake_free_queues(struct ieee80211_hw *dev)
326 {
327         struct p54_common *priv = dev->priv;
328         int i;
329
330         /* ieee80211_start_queues is great if all queues are really empty.
331          * But, what if some are full? */
332
333         for (i = 0; i < dev->queues; i++)
334                 if (priv->tx_stats.data[i].len < priv->tx_stats.data[i].limit)
335                         ieee80211_wake_queue(dev, i);
336 }
337
338 static void p54_rx_frame_sent(struct ieee80211_hw *dev, struct sk_buff *skb)
339 {
340         struct p54_common *priv = dev->priv;
341         struct p54_control_hdr *hdr = (struct p54_control_hdr *) skb->data;
342         struct p54_frame_sent_hdr *payload = (struct p54_frame_sent_hdr *) hdr->data;
343         struct sk_buff *entry = (struct sk_buff *) priv->tx_queue.next;
344         u32 addr = le32_to_cpu(hdr->req_id) - 0x70;
345         struct memrecord *range = NULL;
346         u32 freed = 0;
347         u32 last_addr = priv->rx_start;
348
349         while (entry != (struct sk_buff *)&priv->tx_queue) {
350                 range = (struct memrecord *)&entry->cb;
351                 if (range->start_addr == addr) {
352                         struct ieee80211_tx_status status = {{0}};
353                         struct p54_control_hdr *entry_hdr;
354                         struct p54_tx_control_allocdata *entry_data;
355                         int pad = 0;
356
357                         if (entry->next != (struct sk_buff *)&priv->tx_queue)
358                                 freed = ((struct memrecord *)&entry->next->cb)->start_addr - last_addr;
359                         else
360                                 freed = priv->rx_end - last_addr;
361
362                         last_addr = range->end_addr;
363                         __skb_unlink(entry, &priv->tx_queue);
364                         if (!range->control) {
365                                 kfree_skb(entry);
366                                 break;
367                         }
368                         memcpy(&status.control, range->control,
369                                sizeof(status.control));
370                         kfree(range->control);
371                         priv->tx_stats.data[status.control.queue].len--;
372
373                         entry_hdr = (struct p54_control_hdr *) entry->data;
374                         entry_data = (struct p54_tx_control_allocdata *) entry_hdr->data;
375                         if ((entry_hdr->magic1 & cpu_to_le16(0x4000)) != 0)
376                                 pad = entry_data->align[0];
377
378                         if (!(status.control.flags & IEEE80211_TXCTL_NO_ACK)) {
379                                 if (!(payload->status & 0x01))
380                                         status.flags |= IEEE80211_TX_STATUS_ACK;
381                                 else
382                                         status.excessive_retries = 1;
383                         }
384                         status.retry_count = payload->retries - 1;
385                         status.ack_signal = le16_to_cpu(payload->ack_rssi);
386                         skb_pull(entry, sizeof(*hdr) + pad + sizeof(*entry_data));
387                         ieee80211_tx_status_irqsafe(dev, entry, &status);
388                         break;
389                 } else
390                         last_addr = range->end_addr;
391                 entry = entry->next;
392         }
393
394         if (freed >= IEEE80211_MAX_RTS_THRESHOLD + 0x170 +
395             sizeof(struct p54_control_hdr))
396                 p54_wake_free_queues(dev);
397 }
398
399 static void p54_rx_control(struct ieee80211_hw *dev, struct sk_buff *skb)
400 {
401         struct p54_control_hdr *hdr = (struct p54_control_hdr *) skb->data;
402
403         switch (le16_to_cpu(hdr->type)) {
404         case P54_CONTROL_TYPE_TXDONE:
405                 p54_rx_frame_sent(dev, skb);
406                 break;
407         case P54_CONTROL_TYPE_BBP:
408                 break;
409         default:
410                 printk(KERN_DEBUG "%s: not handling 0x%02x type control frame\n",
411                        wiphy_name(dev->wiphy), le16_to_cpu(hdr->type));
412                 break;
413         }
414 }
415
416 /* returns zero if skb can be reused */
417 int p54_rx(struct ieee80211_hw *dev, struct sk_buff *skb)
418 {
419         u8 type = le16_to_cpu(*((__le16 *)skb->data)) >> 8;
420         switch (type) {
421         case 0x00:
422         case 0x01:
423                 p54_rx_data(dev, skb);
424                 return -1;
425         case 0x4d:
426                 /* TODO: do something better... but then again, I've never seen this happen */
427                 printk(KERN_ERR "%s: Received fault. Probably need to restart hardware now..\n",
428                        wiphy_name(dev->wiphy));
429                 break;
430         case 0x80:
431                 p54_rx_control(dev, skb);
432                 break;
433         default:
434                 printk(KERN_ERR "%s: unknown frame RXed (0x%02x)\n",
435                        wiphy_name(dev->wiphy), type);
436                 break;
437         }
438         return 0;
439 }
440 EXPORT_SYMBOL_GPL(p54_rx);
441
442 /*
443  * So, the firmware is somewhat stupid and doesn't know what places in its
444  * memory incoming data should go to. By poking around in the firmware, we
445  * can find some unused memory to upload our packets to. However, data that we
446  * want the card to TX needs to stay intact until the card has told us that
447  * it is done with it. This function finds empty places we can upload to and
448  * marks allocated areas as reserved if necessary. p54_rx_frame_sent frees
449  * allocated areas.
450  */
451 static void p54_assign_address(struct ieee80211_hw *dev, struct sk_buff *skb,
452                                struct p54_control_hdr *data, u32 len,
453                                struct ieee80211_tx_control *control)
454 {
455         struct p54_common *priv = dev->priv;
456         struct sk_buff *entry = priv->tx_queue.next;
457         struct sk_buff *target_skb = NULL;
458         struct memrecord *range;
459         u32 last_addr = priv->rx_start;
460         u32 largest_hole = 0;
461         u32 target_addr = priv->rx_start;
462         unsigned long flags;
463         unsigned int left;
464         len = (len + 0x170 + 3) & ~0x3; /* 0x70 headroom, 0x100 tailroom */
465
466         spin_lock_irqsave(&priv->tx_queue.lock, flags);
467         left = skb_queue_len(&priv->tx_queue);
468         while (left--) {
469                 u32 hole_size;
470                 range = (struct memrecord *)&entry->cb;
471                 hole_size = range->start_addr - last_addr;
472                 if (!target_skb && hole_size >= len) {
473                         target_skb = entry->prev;
474                         hole_size -= len;
475                         target_addr = last_addr;
476                 }
477                 largest_hole = max(largest_hole, hole_size);
478                 last_addr = range->end_addr;
479                 entry = entry->next;
480         }
481         if (!target_skb && priv->rx_end - last_addr >= len) {
482                 target_skb = priv->tx_queue.prev;
483                 largest_hole = max(largest_hole, priv->rx_end - last_addr - len);
484                 if (!skb_queue_empty(&priv->tx_queue)) {
485                         range = (struct memrecord *)&target_skb->cb;
486                         target_addr = range->end_addr;
487                 }
488         } else
489                 largest_hole = max(largest_hole, priv->rx_end - last_addr);
490
491         if (skb) {
492                 range = (struct memrecord *)&skb->cb;
493                 range->start_addr = target_addr;
494                 range->end_addr = target_addr + len;
495                 range->control = control;
496                 __skb_queue_after(&priv->tx_queue, target_skb, skb);
497                 if (largest_hole < IEEE80211_MAX_RTS_THRESHOLD + 0x170 +
498                                    sizeof(struct p54_control_hdr))
499                         ieee80211_stop_queues(dev);
500         }
501         spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
502
503         data->req_id = cpu_to_le32(target_addr + 0x70);
504 }
505
506 static int p54_tx(struct ieee80211_hw *dev, struct sk_buff *skb,
507                   struct ieee80211_tx_control *control)
508 {
509         struct ieee80211_tx_queue_stats_data *current_queue;
510         struct p54_common *priv = dev->priv;
511         struct p54_control_hdr *hdr;
512         struct p54_tx_control_allocdata *txhdr;
513         struct ieee80211_tx_control *control_copy;
514         size_t padding, len;
515         u8 rate;
516
517         current_queue = &priv->tx_stats.data[control->queue];
518         if (unlikely(current_queue->len > current_queue->limit))
519                 return NETDEV_TX_BUSY;
520         current_queue->len++;
521         current_queue->count++;
522         if (current_queue->len == current_queue->limit)
523                 ieee80211_stop_queue(dev, control->queue);
524
525         padding = (unsigned long)(skb->data - (sizeof(*hdr) + sizeof(*txhdr))) & 3;
526         len = skb->len;
527
528         control_copy = kmalloc(sizeof(*control), GFP_ATOMIC);
529         if (control_copy)
530                 memcpy(control_copy, control, sizeof(*control));
531
532         txhdr = (struct p54_tx_control_allocdata *)
533                         skb_push(skb, sizeof(*txhdr) + padding);
534         hdr = (struct p54_control_hdr *) skb_push(skb, sizeof(*hdr));
535
536         if (padding)
537                 hdr->magic1 = cpu_to_le16(0x4010);
538         else
539                 hdr->magic1 = cpu_to_le16(0x0010);
540         hdr->len = cpu_to_le16(len);
541         hdr->type = (control->flags & IEEE80211_TXCTL_NO_ACK) ? 0 : cpu_to_le16(1);
542         hdr->retry1 = hdr->retry2 = control->retry_limit;
543         p54_assign_address(dev, skb, hdr, skb->len, control_copy);
544
545         memset(txhdr->wep_key, 0x0, 16);
546         txhdr->padding = 0;
547         txhdr->padding2 = 0;
548
549         /* TODO: add support for alternate retry TX rates */
550         rate = control->tx_rate;
551         if (control->flags & IEEE80211_TXCTL_USE_RTS_CTS)
552                 rate |= 0x40;
553         else if (control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)
554                 rate |= 0x20;
555         memset(txhdr->rateset, rate, 8);
556         txhdr->wep_key_present = 0;
557         txhdr->wep_key_len = 0;
558         txhdr->frame_type = cpu_to_le32(control->queue + 4);
559         txhdr->magic4 = 0;
560         txhdr->antenna = (control->antenna_sel_tx == 0) ?
561                 2 : control->antenna_sel_tx - 1;
562         txhdr->output_power = 0x7f; // HW Maximum
563         txhdr->magic5 = (control->flags & IEEE80211_TXCTL_NO_ACK) ?
564                 0 : ((rate > 0x3) ? cpu_to_le32(0x33) : cpu_to_le32(0x23));
565         if (padding)
566                 txhdr->align[0] = padding;
567
568         priv->tx(dev, hdr, skb->len, 0);
569         return 0;
570 }
571
572 static int p54_set_filter(struct ieee80211_hw *dev, u16 filter_type,
573                           const u8 *dst, const u8 *src, u8 antenna,
574                           u32 magic3, u32 magic8, u32 magic9)
575 {
576         struct p54_common *priv = dev->priv;
577         struct p54_control_hdr *hdr;
578         struct p54_tx_control_filter *filter;
579
580         hdr = kzalloc(sizeof(*hdr) + sizeof(*filter) +
581                       priv->tx_hdr_len, GFP_ATOMIC);
582         if (!hdr)
583                 return -ENOMEM;
584
585         hdr = (void *)hdr + priv->tx_hdr_len;
586
587         filter = (struct p54_tx_control_filter *) hdr->data;
588         hdr->magic1 = cpu_to_le16(0x8001);
589         hdr->len = cpu_to_le16(sizeof(*filter));
590         p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*filter), NULL);
591         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_FILTER_SET);
592
593         filter->filter_type = cpu_to_le16(filter_type);
594         memcpy(filter->dst, dst, ETH_ALEN);
595         if (!src)
596                 memset(filter->src, ~0, ETH_ALEN);
597         else
598                 memcpy(filter->src, src, ETH_ALEN);
599         filter->antenna = antenna;
600         filter->magic3 = cpu_to_le32(magic3);
601         filter->rx_addr = cpu_to_le32(priv->rx_end);
602         filter->max_rx = cpu_to_le16(0x0620);   /* FIXME: for usb ver 1.. maybe */
603         filter->rxhw = priv->rxhw;
604         filter->magic8 = cpu_to_le16(magic8);
605         filter->magic9 = cpu_to_le16(magic9);
606
607         priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*filter), 1);
608         return 0;
609 }
610
611 static int p54_set_freq(struct ieee80211_hw *dev, __le16 freq)
612 {
613         struct p54_common *priv = dev->priv;
614         struct p54_control_hdr *hdr;
615         struct p54_tx_control_channel *chan;
616         unsigned int i;
617         size_t payload_len = sizeof(*chan) + sizeof(u32)*2 +
618                              sizeof(*chan->curve_data) *
619                              priv->curve_data->points_per_channel;
620         void *entry;
621
622         hdr = kzalloc(sizeof(*hdr) + payload_len +
623                       priv->tx_hdr_len, GFP_KERNEL);
624         if (!hdr)
625                 return -ENOMEM;
626
627         hdr = (void *)hdr + priv->tx_hdr_len;
628
629         chan = (struct p54_tx_control_channel *) hdr->data;
630
631         hdr->magic1 = cpu_to_le16(0x8001);
632         hdr->len = cpu_to_le16(sizeof(*chan));
633         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_CHANNEL_CHANGE);
634         p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + payload_len, NULL);
635
636         chan->magic1 = cpu_to_le16(0x1);
637         chan->magic2 = cpu_to_le16(0x0);
638
639         for (i = 0; i < priv->iq_autocal_len; i++) {
640                 if (priv->iq_autocal[i].freq != freq)
641                         continue;
642
643                 memcpy(&chan->iq_autocal, &priv->iq_autocal[i],
644                        sizeof(*priv->iq_autocal));
645                 break;
646         }
647         if (i == priv->iq_autocal_len)
648                 goto err;
649
650         for (i = 0; i < priv->output_limit_len; i++) {
651                 if (priv->output_limit[i].freq != freq)
652                         continue;
653
654                 chan->val_barker = 0x38;
655                 chan->val_bpsk = priv->output_limit[i].val_bpsk;
656                 chan->val_qpsk = priv->output_limit[i].val_qpsk;
657                 chan->val_16qam = priv->output_limit[i].val_16qam;
658                 chan->val_64qam = priv->output_limit[i].val_64qam;
659                 break;
660         }
661         if (i == priv->output_limit_len)
662                 goto err;
663
664         chan->pa_points_per_curve = priv->curve_data->points_per_channel;
665
666         entry = priv->curve_data->data;
667         for (i = 0; i < priv->curve_data->channels; i++) {
668                 if (*((__le16 *)entry) != freq) {
669                         entry += sizeof(__le16);
670                         entry += sizeof(struct pda_pa_curve_data_sample_rev1) *
671                                  chan->pa_points_per_curve;
672                         continue;
673                 }
674
675                 entry += sizeof(__le16);
676                 memcpy(chan->curve_data, entry, sizeof(*chan->curve_data) *
677                        chan->pa_points_per_curve);
678                 break;
679         }
680
681         memcpy(hdr->data + payload_len - 4, &chan->val_bpsk, 4);
682
683         priv->tx(dev, hdr, sizeof(*hdr) + payload_len, 1);
684         return 0;
685
686  err:
687         printk(KERN_ERR "%s: frequency change failed\n", wiphy_name(dev->wiphy));
688         kfree(hdr);
689         return -EINVAL;
690 }
691
692 static int p54_set_leds(struct ieee80211_hw *dev, int mode, int link, int act)
693 {
694         struct p54_common *priv = dev->priv;
695         struct p54_control_hdr *hdr;
696         struct p54_tx_control_led *led;
697
698         hdr = kzalloc(sizeof(*hdr) + sizeof(*led) +
699                       priv->tx_hdr_len, GFP_KERNEL);
700         if (!hdr)
701                 return -ENOMEM;
702
703         hdr = (void *)hdr + priv->tx_hdr_len;
704         hdr->magic1 = cpu_to_le16(0x8001);
705         hdr->len = cpu_to_le16(sizeof(*led));
706         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_LED);
707         p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*led), NULL);
708
709         led = (struct p54_tx_control_led *) hdr->data;
710         led->mode = cpu_to_le16(mode);
711         led->led_permanent = cpu_to_le16(link);
712         led->led_temporary = cpu_to_le16(act);
713         led->duration = cpu_to_le16(1000);
714
715         priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*led), 1);
716
717         return 0;
718 }
719
720 #define P54_SET_QUEUE(queue, ai_fs, cw_min, cw_max, burst)      \
721 do {                                                            \
722         queue.aifs = cpu_to_le16(ai_fs);                        \
723         queue.cwmin = cpu_to_le16(cw_min);                      \
724         queue.cwmax = cpu_to_le16(cw_max);                      \
725         queue.txop = (burst == 0) ?                             \
726                 0 : cpu_to_le16((burst * 100) / 32 + 1);        \
727 } while(0)
728
729 static void p54_init_vdcf(struct ieee80211_hw *dev)
730 {
731         struct p54_common *priv = dev->priv;
732         struct p54_control_hdr *hdr;
733         struct p54_tx_control_vdcf *vdcf;
734
735         /* all USB V1 adapters need a extra headroom */
736         hdr = (void *)priv->cached_vdcf + priv->tx_hdr_len;
737         hdr->magic1 = cpu_to_le16(0x8001);
738         hdr->len = cpu_to_le16(sizeof(*vdcf));
739         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_DCFINIT);
740         hdr->req_id = cpu_to_le32(priv->rx_start);
741
742         vdcf = (struct p54_tx_control_vdcf *) hdr->data;
743
744         P54_SET_QUEUE(vdcf->queue[0], 0x0002, 0x0003, 0x0007, 0x000f);
745         P54_SET_QUEUE(vdcf->queue[1], 0x0002, 0x0007, 0x000f, 0x001e);
746         P54_SET_QUEUE(vdcf->queue[2], 0x0002, 0x000f, 0x03ff, 0x0014);
747         P54_SET_QUEUE(vdcf->queue[3], 0x0007, 0x000f, 0x03ff, 0x0000);
748 }
749
750 static void p54_set_vdcf(struct ieee80211_hw *dev)
751 {
752         struct p54_common *priv = dev->priv;
753         struct p54_control_hdr *hdr;
754         struct p54_tx_control_vdcf *vdcf;
755
756         hdr = (void *)priv->cached_vdcf + priv->tx_hdr_len;
757
758         p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*vdcf), NULL);
759
760         vdcf = (struct p54_tx_control_vdcf *) hdr->data;
761
762         if (dev->conf.flags & IEEE80211_CONF_SHORT_SLOT_TIME) {
763                 vdcf->slottime = 9;
764                 vdcf->magic1 = 0x00;
765                 vdcf->magic2 = 0x10;
766         } else {
767                 vdcf->slottime = 20;
768                 vdcf->magic1 = 0x0a;
769                 vdcf->magic2 = 0x06;
770         }
771
772         /* (see prism54/isl_oid.h for further details) */
773         vdcf->frameburst = cpu_to_le16(0);
774
775         priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*vdcf), 0);
776 }
777
778 static int p54_start(struct ieee80211_hw *dev)
779 {
780         struct p54_common *priv = dev->priv;
781         int err;
782
783         err = priv->open(dev);
784         if (!err)
785                 priv->mode = IEEE80211_IF_TYPE_MNTR;
786
787         return err;
788 }
789
790 static void p54_stop(struct ieee80211_hw *dev)
791 {
792         struct p54_common *priv = dev->priv;
793         struct sk_buff *skb;
794         while ((skb = skb_dequeue(&priv->tx_queue))) {
795                 struct memrecord *range = (struct memrecord *)&skb->cb;
796                 if (range->control)
797                         kfree(range->control);
798                 kfree_skb(skb);
799         }
800         priv->stop(dev);
801         priv->mode = IEEE80211_IF_TYPE_INVALID;
802 }
803
804 static int p54_add_interface(struct ieee80211_hw *dev,
805                              struct ieee80211_if_init_conf *conf)
806 {
807         struct p54_common *priv = dev->priv;
808
809         if (priv->mode != IEEE80211_IF_TYPE_MNTR)
810                 return -EOPNOTSUPP;
811
812         switch (conf->type) {
813         case IEEE80211_IF_TYPE_STA:
814                 priv->mode = conf->type;
815                 break;
816         default:
817                 return -EOPNOTSUPP;
818         }
819
820         memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
821
822         p54_set_filter(dev, 0, priv->mac_addr, NULL, 0, 1, 0, 0xF642);
823         p54_set_filter(dev, 0, priv->mac_addr, NULL, 1, 0, 0, 0xF642);
824
825         switch (conf->type) {
826         case IEEE80211_IF_TYPE_STA:
827                 p54_set_filter(dev, 1, priv->mac_addr, NULL, 0, 0x15F, 0x1F4, 0);
828                 break;
829         default:
830                 BUG();  /* impossible */
831                 break;
832         }
833
834         p54_set_leds(dev, 1, 0, 0);
835
836         return 0;
837 }
838
839 static void p54_remove_interface(struct ieee80211_hw *dev,
840                                  struct ieee80211_if_init_conf *conf)
841 {
842         struct p54_common *priv = dev->priv;
843         priv->mode = IEEE80211_IF_TYPE_MNTR;
844         memset(priv->mac_addr, 0, ETH_ALEN);
845         p54_set_filter(dev, 0, priv->mac_addr, NULL, 2, 0, 0, 0);
846 }
847
848 static int p54_config(struct ieee80211_hw *dev, struct ieee80211_conf *conf)
849 {
850         int ret;
851
852         ret = p54_set_freq(dev, cpu_to_le16(conf->freq));
853         p54_set_vdcf(dev);
854         return ret;
855 }
856
857 static int p54_config_interface(struct ieee80211_hw *dev,
858                                 struct ieee80211_vif *vif,
859                                 struct ieee80211_if_conf *conf)
860 {
861         struct p54_common *priv = dev->priv;
862
863         p54_set_filter(dev, 0, priv->mac_addr, conf->bssid, 0, 1, 0, 0xF642);
864         p54_set_filter(dev, 0, priv->mac_addr, conf->bssid, 2, 0, 0, 0);
865         p54_set_leds(dev, 1, !is_multicast_ether_addr(conf->bssid), 0);
866         memcpy(priv->bssid, conf->bssid, ETH_ALEN);
867         return 0;
868 }
869
870 static void p54_configure_filter(struct ieee80211_hw *dev,
871                                  unsigned int changed_flags,
872                                  unsigned int *total_flags,
873                                  int mc_count, struct dev_mc_list *mclist)
874 {
875         struct p54_common *priv = dev->priv;
876
877         *total_flags &= FIF_BCN_PRBRESP_PROMISC;
878
879         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
880                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
881                         p54_set_filter(dev, 0, priv->mac_addr,
882                                        NULL, 2, 0, 0, 0);
883                 else
884                         p54_set_filter(dev, 0, priv->mac_addr,
885                                        priv->bssid, 2, 0, 0, 0);
886         }
887 }
888
889 static int p54_conf_tx(struct ieee80211_hw *dev, int queue,
890                        const struct ieee80211_tx_queue_params *params)
891 {
892         struct p54_common *priv = dev->priv;
893         struct p54_tx_control_vdcf *vdcf;
894
895         vdcf = (struct p54_tx_control_vdcf *)(((struct p54_control_hdr *)
896                 ((void *)priv->cached_vdcf + priv->tx_hdr_len))->data);
897
898         if ((params) && !((queue < 0) || (queue > 4))) {
899                 P54_SET_QUEUE(vdcf->queue[queue], params->aifs,
900                         params->cw_min, params->cw_max, params->burst_time);
901         } else
902                 return -EINVAL;
903
904         p54_set_vdcf(dev);
905
906         return 0;
907 }
908
909 static int p54_get_stats(struct ieee80211_hw *dev,
910                          struct ieee80211_low_level_stats *stats)
911 {
912         /* TODO */
913         return 0;
914 }
915
916 static int p54_get_tx_stats(struct ieee80211_hw *dev,
917                             struct ieee80211_tx_queue_stats *stats)
918 {
919         struct p54_common *priv = dev->priv;
920         unsigned int i;
921
922         for (i = 0; i < dev->queues; i++)
923                 memcpy(&stats->data[i], &priv->tx_stats.data[i],
924                         sizeof(stats->data[i]));
925
926         return 0;
927 }
928
929 static const struct ieee80211_ops p54_ops = {
930         .tx                     = p54_tx,
931         .start                  = p54_start,
932         .stop                   = p54_stop,
933         .add_interface          = p54_add_interface,
934         .remove_interface       = p54_remove_interface,
935         .config                 = p54_config,
936         .config_interface       = p54_config_interface,
937         .configure_filter       = p54_configure_filter,
938         .conf_tx                = p54_conf_tx,
939         .get_stats              = p54_get_stats,
940         .get_tx_stats           = p54_get_tx_stats
941 };
942
943 struct ieee80211_hw *p54_init_common(size_t priv_data_len)
944 {
945         struct ieee80211_hw *dev;
946         struct p54_common *priv;
947         int i;
948
949         dev = ieee80211_alloc_hw(priv_data_len, &p54_ops);
950         if (!dev)
951                 return NULL;
952
953         priv = dev->priv;
954         priv->mode = IEEE80211_IF_TYPE_INVALID;
955         skb_queue_head_init(&priv->tx_queue);
956         memcpy(priv->channels, p54_channels, sizeof(p54_channels));
957         memcpy(priv->rates, p54_rates, sizeof(p54_rates));
958         priv->modes[1].mode = MODE_IEEE80211B;
959         priv->modes[1].num_rates = 4;
960         priv->modes[1].rates = priv->rates;
961         priv->modes[1].num_channels = ARRAY_SIZE(p54_channels);
962         priv->modes[1].channels = priv->channels;
963         priv->modes[0].mode = MODE_IEEE80211G;
964         priv->modes[0].num_rates = ARRAY_SIZE(p54_rates);
965         priv->modes[0].rates = priv->rates;
966         priv->modes[0].num_channels = ARRAY_SIZE(p54_channels);
967         priv->modes[0].channels = priv->channels;
968         dev->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING | /* not sure */
969                     IEEE80211_HW_RX_INCLUDES_FCS;
970         dev->channel_change_time = 1000;        /* TODO: find actual value */
971         dev->max_rssi = 127;
972
973         priv->tx_stats.data[0].limit = 5;
974         dev->queues = 1;
975
976         dev->extra_tx_headroom = sizeof(struct p54_control_hdr) + 4 +
977                                  sizeof(struct p54_tx_control_allocdata);
978
979         priv->cached_vdcf = kzalloc(sizeof(struct p54_tx_control_vdcf) +
980               priv->tx_hdr_len + sizeof(struct p54_control_hdr), GFP_KERNEL);
981
982         if (!priv->cached_vdcf) {
983                 ieee80211_free_hw(dev);
984                 return NULL;
985         }
986
987         p54_init_vdcf(dev);
988
989         for (i = 0; i < 2; i++) {
990                 if (ieee80211_register_hwmode(dev, &priv->modes[i])) {
991                         kfree(priv->cached_vdcf);
992                         ieee80211_free_hw(dev);
993                         return NULL;
994                 }
995         }
996
997         return dev;
998 }
999 EXPORT_SYMBOL_GPL(p54_init_common);
1000
1001 void p54_free_common(struct ieee80211_hw *dev)
1002 {
1003         struct p54_common *priv = dev->priv;
1004         kfree(priv->iq_autocal);
1005         kfree(priv->output_limit);
1006         kfree(priv->curve_data);
1007         kfree(priv->cached_vdcf);
1008 }
1009 EXPORT_SYMBOL_GPL(p54_free_common);
1010
1011 static int __init p54_init(void)
1012 {
1013         return 0;
1014 }
1015
1016 static void __exit p54_exit(void)
1017 {
1018 }
1019
1020 module_init(p54_init);
1021 module_exit(p54_exit);