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1 /*
2  * Host AP (software wireless LAN access point) driver for
3  * Intersil Prism2/2.5/3.
4  *
5  * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
6  * <jkmaline@cc.hut.fi>
7  * Copyright (c) 2002-2005, Jouni Malinen <jkmaline@cc.hut.fi>
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License version 2 as
11  * published by the Free Software Foundation. See README and COPYING for
12  * more details.
13  *
14  * FIX:
15  * - there is currently no way of associating TX packets to correct wds device
16  *   when TX Exc/OK event occurs, so all tx_packets and some
17  *   tx_errors/tx_dropped are added to the main netdevice; using sw_support
18  *   field in txdesc might be used to fix this (using Alloc event to increment
19  *   tx_packets would need some further info in txfid table)
20  *
21  * Buffer Access Path (BAP) usage:
22  *   Prism2 cards have two separate BAPs for accessing the card memory. These
23  *   should allow concurrent access to two different frames and the driver
24  *   previously used BAP0 for sending data and BAP1 for receiving data.
25  *   However, there seems to be number of issues with concurrent access and at
26  *   least one know hardware bug in using BAP0 and BAP1 concurrently with PCI
27  *   Prism2.5. Therefore, the driver now only uses BAP0 for moving data between
28  *   host and card memories. BAP0 accesses are protected with local->baplock
29  *   (spin_lock_bh) to prevent concurrent use.
30  */
31
32
33 #include <linux/config.h>
34 #include <linux/version.h>
35
36 #include <asm/delay.h>
37 #include <asm/uaccess.h>
38
39 #include <linux/slab.h>
40 #include <linux/netdevice.h>
41 #include <linux/etherdevice.h>
42 #include <linux/proc_fs.h>
43 #include <linux/if_arp.h>
44 #include <linux/delay.h>
45 #include <linux/random.h>
46 #include <linux/wait.h>
47 #include <linux/sched.h>
48 #include <linux/rtnetlink.h>
49 #include <linux/wireless.h>
50 #include <net/iw_handler.h>
51 #include <net/ieee80211.h>
52 #include <net/ieee80211_crypt.h>
53 #include <asm/irq.h>
54
55 #include "hostap_80211.h"
56 #include "hostap.h"
57 #include "hostap_ap.h"
58
59
60 /* #define final_version */
61
62 static int mtu = 1500;
63 module_param(mtu, int, 0444);
64 MODULE_PARM_DESC(mtu, "Maximum transfer unit");
65
66 static int channel[MAX_PARM_DEVICES] = { 3, DEF_INTS };
67 module_param_array(channel, int, NULL, 0444);
68 MODULE_PARM_DESC(channel, "Initial channel");
69
70 static char essid[33] = "test";
71 module_param_string(essid, essid, sizeof(essid), 0444);
72 MODULE_PARM_DESC(essid, "Host AP's ESSID");
73
74 static int iw_mode[MAX_PARM_DEVICES] = { IW_MODE_MASTER, DEF_INTS };
75 module_param_array(iw_mode, int, NULL, 0444);
76 MODULE_PARM_DESC(iw_mode, "Initial operation mode");
77
78 static int beacon_int[MAX_PARM_DEVICES] = { 100, DEF_INTS };
79 module_param_array(beacon_int, int, NULL, 0444);
80 MODULE_PARM_DESC(beacon_int, "Beacon interval (1 = 1024 usec)");
81
82 static int dtim_period[MAX_PARM_DEVICES] = { 1, DEF_INTS };
83 module_param_array(dtim_period, int, NULL, 0444);
84 MODULE_PARM_DESC(dtim_period, "DTIM period");
85
86 #if defined(PRISM2_PCI) && defined(PRISM2_BUS_MASTER)
87 static int bus_master_threshold_rx[MAX_PARM_DEVICES] = { 100, DEF_INTS };
88 module_param_array(bus_master_threshold_rx, int, NULL, 0444);
89 MODULE_PARM_DESC(bus_master_threshold_rx, "Packet length threshold for using "
90                  "PCI bus master on RX");
91
92 static int bus_master_threshold_tx[MAX_PARM_DEVICES] = { 100, DEF_INTS };
93 module_param_array(bus_master_threshold_tx, int, NULL, 0444);
94 MODULE_PARM_DESC(bus_master_threshold_tx, "Packet length threshold for using "
95                  "PCI bus master on TX");
96 #endif /* PRISM2_PCI and PRISM2_BUS_MASTER */
97
98 static char dev_template[16] = "wlan%d";
99 module_param_string(dev_template, dev_template, sizeof(dev_template), 0444);
100 MODULE_PARM_DESC(dev_template, "Prefix for network device name (default: "
101                  "wlan%d)");
102
103 #ifdef final_version
104 #define EXTRA_EVENTS_WTERR 0
105 #else
106 /* check WTERR events (Wait Time-out) in development versions */
107 #define EXTRA_EVENTS_WTERR HFA384X_EV_WTERR
108 #endif
109
110 #if defined(PRISM2_PCI) && defined(PRISM2_BUS_MASTER)
111 #define EXTRA_EVENTS_BUS_MASTER (HFA384X_EV_PCI_M0 | HFA384X_EV_PCI_M1)
112 #else
113 #define EXTRA_EVENTS_BUS_MASTER 0
114 #endif
115
116 /* Events that will be using BAP0 */
117 #define HFA384X_BAP0_EVENTS \
118         (HFA384X_EV_TXEXC | HFA384X_EV_RX | HFA384X_EV_INFO | HFA384X_EV_TX)
119
120 /* event mask, i.e., events that will result in an interrupt */
121 #define HFA384X_EVENT_MASK \
122         (HFA384X_BAP0_EVENTS | HFA384X_EV_ALLOC | HFA384X_EV_INFDROP | \
123         HFA384X_EV_CMD | HFA384X_EV_TICK | \
124         EXTRA_EVENTS_WTERR | EXTRA_EVENTS_BUS_MASTER)
125
126 /* Default TX control flags: use 802.11 headers and request interrupt for
127  * failed transmits. Frames that request ACK callback, will add
128  * _TX_OK flag and _ALT_RTRY flag may be used to select different retry policy.
129  */
130 #define HFA384X_TX_CTRL_FLAGS \
131         (HFA384X_TX_CTRL_802_11 | HFA384X_TX_CTRL_TX_EX)
132
133
134 /* ca. 1 usec */
135 #define HFA384X_CMD_BUSY_TIMEOUT 5000
136 #define HFA384X_BAP_BUSY_TIMEOUT 50000
137
138 /* ca. 10 usec */
139 #define HFA384X_CMD_COMPL_TIMEOUT 20000
140 #define HFA384X_DL_COMPL_TIMEOUT 1000000
141
142 /* Wait times for initialization; yield to other processes to avoid busy
143  * waiting for long time. */
144 #define HFA384X_INIT_TIMEOUT (HZ / 2) /* 500 ms */
145 #define HFA384X_ALLOC_COMPL_TIMEOUT (HZ / 20) /* 50 ms */
146
147
148 static void prism2_hw_reset(struct net_device *dev);
149 static void prism2_check_sta_fw_version(local_info_t *local);
150
151 #ifdef PRISM2_DOWNLOAD_SUPPORT
152 /* hostap_download.c */
153 static int prism2_download_aux_dump(struct net_device *dev,
154                                     unsigned int addr, int len, u8 *buf);
155 static u8 * prism2_read_pda(struct net_device *dev);
156 static int prism2_download(local_info_t *local,
157                            struct prism2_download_param *param);
158 static void prism2_download_free_data(struct prism2_download_data *dl);
159 static int prism2_download_volatile(local_info_t *local,
160                                     struct prism2_download_data *param);
161 static int prism2_download_genesis(local_info_t *local,
162                                    struct prism2_download_data *param);
163 static int prism2_get_ram_size(local_info_t *local);
164 #endif /* PRISM2_DOWNLOAD_SUPPORT */
165
166
167
168
169 #ifndef final_version
170 /* magic value written to SWSUPPORT0 reg. for detecting whether card is still
171  * present */
172 #define HFA384X_MAGIC 0x8A32
173 #endif
174
175
176 static u16 hfa384x_read_reg(struct net_device *dev, u16 reg)
177 {
178         return HFA384X_INW(reg);
179 }
180
181
182 static void hfa384x_read_regs(struct net_device *dev,
183                               struct hfa384x_regs *regs)
184 {
185         regs->cmd = HFA384X_INW(HFA384X_CMD_OFF);
186         regs->evstat = HFA384X_INW(HFA384X_EVSTAT_OFF);
187         regs->offset0 = HFA384X_INW(HFA384X_OFFSET0_OFF);
188         regs->offset1 = HFA384X_INW(HFA384X_OFFSET1_OFF);
189         regs->swsupport0 = HFA384X_INW(HFA384X_SWSUPPORT0_OFF);
190 }
191
192
193 /**
194  * __hostap_cmd_queue_free - Free Prism2 command queue entry (private)
195  * @local: pointer to private Host AP driver data
196  * @entry: Prism2 command queue entry to be freed
197  * @del_req: request the entry to be removed
198  *
199  * Internal helper function for freeing Prism2 command queue entries.
200  * Caller must have acquired local->cmdlock before calling this function.
201  */
202 static inline void __hostap_cmd_queue_free(local_info_t *local,
203                                            struct hostap_cmd_queue *entry,
204                                            int del_req)
205 {
206         if (del_req) {
207                 entry->del_req = 1;
208                 if (!list_empty(&entry->list)) {
209                         list_del_init(&entry->list);
210                         local->cmd_queue_len--;
211                 }
212         }
213
214         if (atomic_dec_and_test(&entry->usecnt) && entry->del_req)
215                 kfree(entry);
216 }
217
218
219 /**
220  * hostap_cmd_queue_free - Free Prism2 command queue entry
221  * @local: pointer to private Host AP driver data
222  * @entry: Prism2 command queue entry to be freed
223  * @del_req: request the entry to be removed
224  *
225  * Free a Prism2 command queue entry.
226  */
227 static inline void hostap_cmd_queue_free(local_info_t *local,
228                                          struct hostap_cmd_queue *entry,
229                                          int del_req)
230 {
231         unsigned long flags;
232
233         spin_lock_irqsave(&local->cmdlock, flags);
234         __hostap_cmd_queue_free(local, entry, del_req);
235         spin_unlock_irqrestore(&local->cmdlock, flags);
236 }
237
238
239 /**
240  * prism2_clear_cmd_queue - Free all pending Prism2 command queue entries
241  * @local: pointer to private Host AP driver data
242  */
243 static void prism2_clear_cmd_queue(local_info_t *local)
244 {
245         struct list_head *ptr, *n;
246         unsigned long flags;
247         struct hostap_cmd_queue *entry;
248
249         spin_lock_irqsave(&local->cmdlock, flags);
250         list_for_each_safe(ptr, n, &local->cmd_queue) {
251                 entry = list_entry(ptr, struct hostap_cmd_queue, list);
252                 atomic_inc(&entry->usecnt);
253                 printk(KERN_DEBUG "%s: removed pending cmd_queue entry "
254                        "(type=%d, cmd=0x%04x, param0=0x%04x)\n",
255                        local->dev->name, entry->type, entry->cmd,
256                        entry->param0);
257                 __hostap_cmd_queue_free(local, entry, 1);
258         }
259         if (local->cmd_queue_len) {
260                 /* This should not happen; print debug message and clear
261                  * queue length. */
262                 printk(KERN_DEBUG "%s: cmd_queue_len (%d) not zero after "
263                        "flush\n", local->dev->name, local->cmd_queue_len);
264                 local->cmd_queue_len = 0;
265         }
266         spin_unlock_irqrestore(&local->cmdlock, flags);
267 }
268
269
270 /**
271  * hfa384x_cmd_issue - Issue a Prism2 command to the hardware
272  * @dev: pointer to net_device
273  * @entry: Prism2 command queue entry to be issued
274  */
275 static inline int hfa384x_cmd_issue(struct net_device *dev,
276                                     struct hostap_cmd_queue *entry)
277 {
278         struct hostap_interface *iface;
279         local_info_t *local;
280         int tries;
281         u16 reg;
282         unsigned long flags;
283
284         iface = netdev_priv(dev);
285         local = iface->local;
286
287         if (local->func->card_present && !local->func->card_present(local))
288                 return -ENODEV;
289
290         if (entry->issued) {
291                 printk(KERN_DEBUG "%s: driver bug - re-issuing command @%p\n",
292                        dev->name, entry);
293         }
294
295         /* wait until busy bit is clear; this should always be clear since the
296          * commands are serialized */
297         tries = HFA384X_CMD_BUSY_TIMEOUT;
298         while (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY && tries > 0) {
299                 tries--;
300                 udelay(1);
301         }
302 #ifndef final_version
303         if (tries != HFA384X_CMD_BUSY_TIMEOUT) {
304                 prism2_io_debug_error(dev, 1);
305                 printk(KERN_DEBUG "%s: hfa384x_cmd_issue: cmd reg was busy "
306                        "for %d usec\n", dev->name,
307                        HFA384X_CMD_BUSY_TIMEOUT - tries);
308         }
309 #endif
310         if (tries == 0) {
311                 reg = HFA384X_INW(HFA384X_CMD_OFF);
312                 prism2_io_debug_error(dev, 2);
313                 printk(KERN_DEBUG "%s: hfa384x_cmd_issue - timeout - "
314                        "reg=0x%04x\n", dev->name, reg);
315                 return -ETIMEDOUT;
316         }
317
318         /* write command */
319         spin_lock_irqsave(&local->cmdlock, flags);
320         HFA384X_OUTW(entry->param0, HFA384X_PARAM0_OFF);
321         HFA384X_OUTW(entry->param1, HFA384X_PARAM1_OFF);
322         HFA384X_OUTW(entry->cmd, HFA384X_CMD_OFF);
323         entry->issued = 1;
324         spin_unlock_irqrestore(&local->cmdlock, flags);
325
326         return 0;
327 }
328
329
330 /**
331  * hfa384x_cmd - Issue a Prism2 command and wait (sleep) for completion
332  * @dev: pointer to net_device
333  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
334  * @param0: value for Param0 register
335  * @param1: value for Param1 register (pointer; %NULL if not used)
336  * @resp0: pointer for Resp0 data or %NULL if Resp0 is not needed
337  *
338  * Issue given command (possibly after waiting in command queue) and sleep
339  * until the command is completed (or timed out or interrupted). This can be
340  * called only from user process context.
341  */
342 static int hfa384x_cmd(struct net_device *dev, u16 cmd, u16 param0,
343                        u16 *param1, u16 *resp0)
344 {
345         struct hostap_interface *iface;
346         local_info_t *local;
347         int err, res, issue, issued = 0;
348         unsigned long flags;
349         struct hostap_cmd_queue *entry;
350         DECLARE_WAITQUEUE(wait, current);
351
352         iface = netdev_priv(dev);
353         local = iface->local;
354
355         if (in_interrupt()) {
356                 printk(KERN_DEBUG "%s: hfa384x_cmd called from interrupt "
357                        "context\n", dev->name);
358                 return -1;
359         }
360
361         if (local->cmd_queue_len >= HOSTAP_CMD_QUEUE_MAX_LEN) {
362                 printk(KERN_DEBUG "%s: hfa384x_cmd: cmd_queue full\n",
363                        dev->name);
364                 return -1;
365         }
366
367         if (signal_pending(current))
368                 return -EINTR;
369
370         entry = (struct hostap_cmd_queue *)
371                 kmalloc(sizeof(*entry), GFP_ATOMIC);
372         if (entry == NULL) {
373                 printk(KERN_DEBUG "%s: hfa384x_cmd - kmalloc failed\n",
374                        dev->name);
375                 return -ENOMEM;
376         }
377         memset(entry, 0, sizeof(*entry));
378         atomic_set(&entry->usecnt, 1);
379         entry->type = CMD_SLEEP;
380         entry->cmd = cmd;
381         entry->param0 = param0;
382         if (param1)
383                 entry->param1 = *param1;
384         init_waitqueue_head(&entry->compl);
385
386         /* prepare to wait for command completion event, but do not sleep yet
387          */
388         add_wait_queue(&entry->compl, &wait);
389         set_current_state(TASK_INTERRUPTIBLE);
390
391         spin_lock_irqsave(&local->cmdlock, flags);
392         issue = list_empty(&local->cmd_queue);
393         if (issue)
394                 entry->issuing = 1;
395         list_add_tail(&entry->list, &local->cmd_queue);
396         local->cmd_queue_len++;
397         spin_unlock_irqrestore(&local->cmdlock, flags);
398
399         err = 0;
400         if (!issue)
401                 goto wait_completion;
402
403         if (signal_pending(current))
404                 err = -EINTR;
405
406         if (!err) {
407                 if (hfa384x_cmd_issue(dev, entry))
408                         err = -ETIMEDOUT;
409                 else
410                         issued = 1;
411         }
412
413  wait_completion:
414         if (!err && entry->type != CMD_COMPLETED) {
415                 /* sleep until command is completed or timed out */
416                 res = schedule_timeout(2 * HZ);
417         } else
418                 res = -1;
419
420         if (!err && signal_pending(current))
421                 err = -EINTR;
422
423         if (err && issued) {
424                 /* the command was issued, so a CmdCompl event should occur
425                  * soon; however, there's a pending signal and
426                  * schedule_timeout() would be interrupted; wait a short period
427                  * of time to avoid removing entry from the list before
428                  * CmdCompl event */
429                 udelay(300);
430         }
431
432         set_current_state(TASK_RUNNING);
433         remove_wait_queue(&entry->compl, &wait);
434
435         /* If entry->list is still in the list, it must be removed
436          * first and in this case prism2_cmd_ev() does not yet have
437          * local reference to it, and the data can be kfree()'d
438          * here. If the command completion event is still generated,
439          * it will be assigned to next (possibly) pending command, but
440          * the driver will reset the card anyway due to timeout
441          *
442          * If the entry is not in the list prism2_cmd_ev() has a local
443          * reference to it, but keeps cmdlock as long as the data is
444          * needed, so the data can be kfree()'d here. */
445
446         /* FIX: if the entry->list is in the list, it has not been completed
447          * yet, so removing it here is somewhat wrong.. this could cause
448          * references to freed memory and next list_del() causing NULL pointer
449          * dereference.. it would probably be better to leave the entry in the
450          * list and the list should be emptied during hw reset */
451
452         spin_lock_irqsave(&local->cmdlock, flags);
453         if (!list_empty(&entry->list)) {
454                 printk(KERN_DEBUG "%s: hfa384x_cmd: entry still in list? "
455                        "(entry=%p, type=%d, res=%d)\n", dev->name, entry,
456                        entry->type, res);
457                 list_del_init(&entry->list);
458                 local->cmd_queue_len--;
459         }
460         spin_unlock_irqrestore(&local->cmdlock, flags);
461
462         if (err) {
463                 printk(KERN_DEBUG "%s: hfa384x_cmd: interrupted; err=%d\n",
464                        dev->name, err);
465                 res = err;
466                 goto done;
467         }
468
469         if (entry->type != CMD_COMPLETED) {
470                 u16 reg = HFA384X_INW(HFA384X_EVSTAT_OFF);
471                 printk(KERN_DEBUG "%s: hfa384x_cmd: command was not "
472                        "completed (res=%d, entry=%p, type=%d, cmd=0x%04x, "
473                        "param0=0x%04x, EVSTAT=%04x INTEN=%04x)\n", dev->name,
474                        res, entry, entry->type, entry->cmd, entry->param0, reg,
475                        HFA384X_INW(HFA384X_INTEN_OFF));
476                 if (reg & HFA384X_EV_CMD) {
477                         /* Command completion event is pending, but the
478                          * interrupt was not delivered - probably an issue
479                          * with pcmcia-cs configuration. */
480                         printk(KERN_WARNING "%s: interrupt delivery does not "
481                                "seem to work\n", dev->name);
482                 }
483                 prism2_io_debug_error(dev, 3);
484                 res = -ETIMEDOUT;
485                 goto done;
486         }
487
488         if (resp0 != NULL)
489                 *resp0 = entry->resp0;
490 #ifndef final_version
491         if (entry->res) {
492                 printk(KERN_DEBUG "%s: CMD=0x%04x => res=0x%02x, "
493                        "resp0=0x%04x\n",
494                        dev->name, cmd, entry->res, entry->resp0);
495         }
496 #endif /* final_version */
497
498         res = entry->res;
499  done:
500         hostap_cmd_queue_free(local, entry, 1);
501         return res;
502 }
503
504
505 /**
506  * hfa384x_cmd_callback - Issue a Prism2 command; callback when completed
507  * @dev: pointer to net_device
508  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
509  * @param0: value for Param0 register
510  * @callback: command completion callback function (%NULL = no callback)
511  * @context: context data to be given to the callback function
512  *
513  * Issue given command (possibly after waiting in command queue) and use
514  * callback function to indicate command completion. This can be called both
515  * from user and interrupt context. The callback function will be called in
516  * hardware IRQ context. It can be %NULL, when no function is called when
517  * command is completed.
518  */
519 static int hfa384x_cmd_callback(struct net_device *dev, u16 cmd, u16 param0,
520                                 void (*callback)(struct net_device *dev,
521                                                  long context, u16 resp0,
522                                                  u16 status),
523                                 long context)
524 {
525         struct hostap_interface *iface;
526         local_info_t *local;
527         int issue, ret;
528         unsigned long flags;
529         struct hostap_cmd_queue *entry;
530
531         iface = netdev_priv(dev);
532         local = iface->local;
533
534         if (local->cmd_queue_len >= HOSTAP_CMD_QUEUE_MAX_LEN + 2) {
535                 printk(KERN_DEBUG "%s: hfa384x_cmd: cmd_queue full\n",
536                        dev->name);
537                 return -1;
538         }
539
540         entry = (struct hostap_cmd_queue *)
541                 kmalloc(sizeof(*entry), GFP_ATOMIC);
542         if (entry == NULL) {
543                 printk(KERN_DEBUG "%s: hfa384x_cmd_callback - kmalloc "
544                        "failed\n", dev->name);
545                 return -ENOMEM;
546         }
547         memset(entry, 0, sizeof(*entry));
548         atomic_set(&entry->usecnt, 1);
549         entry->type = CMD_CALLBACK;
550         entry->cmd = cmd;
551         entry->param0 = param0;
552         entry->callback = callback;
553         entry->context = context;
554
555         spin_lock_irqsave(&local->cmdlock, flags);
556         issue = list_empty(&local->cmd_queue);
557         if (issue)
558                 entry->issuing = 1;
559         list_add_tail(&entry->list, &local->cmd_queue);
560         local->cmd_queue_len++;
561         spin_unlock_irqrestore(&local->cmdlock, flags);
562
563         if (issue && hfa384x_cmd_issue(dev, entry))
564                 ret = -ETIMEDOUT;
565         else
566                 ret = 0;
567
568         hostap_cmd_queue_free(local, entry, ret);
569
570         return ret;
571 }
572
573
574 /**
575  * __hfa384x_cmd_no_wait - Issue a Prism2 command (private)
576  * @dev: pointer to net_device
577  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
578  * @param0: value for Param0 register
579  * @io_debug_num: I/O debug error number
580  *
581  * Shared helper function for hfa384x_cmd_wait() and hfa384x_cmd_no_wait().
582  */
583 static int __hfa384x_cmd_no_wait(struct net_device *dev, u16 cmd, u16 param0,
584                                  int io_debug_num)
585 {
586         int tries;
587         u16 reg;
588
589         /* wait until busy bit is clear; this should always be clear since the
590          * commands are serialized */
591         tries = HFA384X_CMD_BUSY_TIMEOUT;
592         while (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY && tries > 0) {
593                 tries--;
594                 udelay(1);
595         }
596         if (tries == 0) {
597                 reg = HFA384X_INW(HFA384X_CMD_OFF);
598                 prism2_io_debug_error(dev, io_debug_num);
599                 printk(KERN_DEBUG "%s: __hfa384x_cmd_no_wait(%d) - timeout - "
600                        "reg=0x%04x\n", dev->name, io_debug_num, reg);
601                 return -ETIMEDOUT;
602         }
603
604         /* write command */
605         HFA384X_OUTW(param0, HFA384X_PARAM0_OFF);
606         HFA384X_OUTW(cmd, HFA384X_CMD_OFF);
607
608         return 0;
609 }
610
611
612 /**
613  * hfa384x_cmd_wait - Issue a Prism2 command and busy wait for completion
614  * @dev: pointer to net_device
615  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
616  * @param0: value for Param0 register
617  */
618 static int hfa384x_cmd_wait(struct net_device *dev, u16 cmd, u16 param0)
619 {
620         int res, tries;
621         u16 reg;
622
623         res = __hfa384x_cmd_no_wait(dev, cmd, param0, 4);
624         if (res)
625                 return res;
626
627         /* wait for command completion */
628         if ((cmd & HFA384X_CMDCODE_MASK) == HFA384X_CMDCODE_DOWNLOAD)
629                 tries = HFA384X_DL_COMPL_TIMEOUT;
630         else
631                 tries = HFA384X_CMD_COMPL_TIMEOUT;
632
633         while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD) &&
634                tries > 0) {
635                 tries--;
636                 udelay(10);
637         }
638         if (tries == 0) {
639                 reg = HFA384X_INW(HFA384X_EVSTAT_OFF);
640                 prism2_io_debug_error(dev, 5);
641                 printk(KERN_DEBUG "%s: hfa384x_cmd_wait - timeout2 - "
642                        "reg=0x%04x\n", dev->name, reg);
643                 return -ETIMEDOUT;
644         }
645
646         res = (HFA384X_INW(HFA384X_STATUS_OFF) &
647                (BIT(14) | BIT(13) | BIT(12) | BIT(11) | BIT(10) | BIT(9) |
648                 BIT(8))) >> 8;
649 #ifndef final_version
650         if (res) {
651                 printk(KERN_DEBUG "%s: CMD=0x%04x => res=0x%02x\n",
652                        dev->name, cmd, res);
653         }
654 #endif
655
656         HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
657
658         return res;
659 }
660
661
662 /**
663  * hfa384x_cmd_no_wait - Issue a Prism2 command; do not wait for completion
664  * @dev: pointer to net_device
665  * @cmd: Prism2 command code (HFA384X_CMD_CODE_*)
666  * @param0: value for Param0 register
667  */
668 static inline int hfa384x_cmd_no_wait(struct net_device *dev, u16 cmd,
669                                       u16 param0)
670 {
671         return __hfa384x_cmd_no_wait(dev, cmd, param0, 6);
672 }
673
674
675 /**
676  * prism2_cmd_ev - Prism2 command completion event handler
677  * @dev: pointer to net_device
678  *
679  * Interrupt handler for command completion events. Called by the main
680  * interrupt handler in hardware IRQ context. Read Resp0 and status registers
681  * from the hardware and ACK the event. Depending on the issued command type
682  * either wake up the sleeping process that is waiting for command completion
683  * or call the callback function. Issue the next command, if one is pending.
684  */
685 static void prism2_cmd_ev(struct net_device *dev)
686 {
687         struct hostap_interface *iface;
688         local_info_t *local;
689         struct hostap_cmd_queue *entry = NULL;
690
691         iface = netdev_priv(dev);
692         local = iface->local;
693
694         spin_lock(&local->cmdlock);
695         if (!list_empty(&local->cmd_queue)) {
696                 entry = list_entry(local->cmd_queue.next,
697                                    struct hostap_cmd_queue, list);
698                 atomic_inc(&entry->usecnt);
699                 list_del_init(&entry->list);
700                 local->cmd_queue_len--;
701
702                 if (!entry->issued) {
703                         printk(KERN_DEBUG "%s: Command completion event, but "
704                                "cmd not issued\n", dev->name);
705                         __hostap_cmd_queue_free(local, entry, 1);
706                         entry = NULL;
707                 }
708         }
709         spin_unlock(&local->cmdlock);
710
711         if (!entry) {
712                 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
713                 printk(KERN_DEBUG "%s: Command completion event, but no "
714                        "pending commands\n", dev->name);
715                 return;
716         }
717
718         entry->resp0 = HFA384X_INW(HFA384X_RESP0_OFF);
719         entry->res = (HFA384X_INW(HFA384X_STATUS_OFF) &
720                       (BIT(14) | BIT(13) | BIT(12) | BIT(11) | BIT(10) |
721                        BIT(9) | BIT(8))) >> 8;
722         HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
723
724         /* TODO: rest of the CmdEv handling could be moved to tasklet */
725         if (entry->type == CMD_SLEEP) {
726                 entry->type = CMD_COMPLETED;
727                 wake_up_interruptible(&entry->compl);
728         } else if (entry->type == CMD_CALLBACK) {
729                 if (entry->callback)
730                         entry->callback(dev, entry->context, entry->resp0,
731                                         entry->res);
732         } else {
733                 printk(KERN_DEBUG "%s: Invalid command completion type %d\n",
734                        dev->name, entry->type);
735         }
736         hostap_cmd_queue_free(local, entry, 1);
737
738         /* issue next command, if pending */
739         entry = NULL;
740         spin_lock(&local->cmdlock);
741         if (!list_empty(&local->cmd_queue)) {
742                 entry = list_entry(local->cmd_queue.next,
743                                    struct hostap_cmd_queue, list);
744                 if (entry->issuing) {
745                         /* hfa384x_cmd() has already started issuing this
746                          * command, so do not start here */
747                         entry = NULL;
748                 }
749                 if (entry)
750                         atomic_inc(&entry->usecnt);
751         }
752         spin_unlock(&local->cmdlock);
753
754         if (entry) {
755                 /* issue next command; if command issuing fails, remove the
756                  * entry from cmd_queue */
757                 int res = hfa384x_cmd_issue(dev, entry);
758                 spin_lock(&local->cmdlock);
759                 __hostap_cmd_queue_free(local, entry, res);
760                 spin_unlock(&local->cmdlock);
761         }
762 }
763
764
765 static inline int hfa384x_wait_offset(struct net_device *dev, u16 o_off)
766 {
767         int tries = HFA384X_BAP_BUSY_TIMEOUT;
768         int res = HFA384X_INW(o_off) & HFA384X_OFFSET_BUSY;
769
770         while (res && tries > 0) {
771                 tries--;
772                 udelay(1);
773                 res = HFA384X_INW(o_off) & HFA384X_OFFSET_BUSY;
774         }
775         return res;
776 }
777
778
779 /* Offset must be even */
780 static int hfa384x_setup_bap(struct net_device *dev, u16 bap, u16 id,
781                              int offset)
782 {
783         u16 o_off, s_off;
784         int ret = 0;
785
786         if (offset % 2 || bap > 1)
787                 return -EINVAL;
788
789         if (bap == BAP1) {
790                 o_off = HFA384X_OFFSET1_OFF;
791                 s_off = HFA384X_SELECT1_OFF;
792         } else {
793                 o_off = HFA384X_OFFSET0_OFF;
794                 s_off = HFA384X_SELECT0_OFF;
795         }
796
797         if (hfa384x_wait_offset(dev, o_off)) {
798                 prism2_io_debug_error(dev, 7);
799                 printk(KERN_DEBUG "%s: hfa384x_setup_bap - timeout before\n",
800                        dev->name);
801                 ret = -ETIMEDOUT;
802                 goto out;
803         }
804
805         HFA384X_OUTW(id, s_off);
806         HFA384X_OUTW(offset, o_off);
807
808         if (hfa384x_wait_offset(dev, o_off)) {
809                 prism2_io_debug_error(dev, 8);
810                 printk(KERN_DEBUG "%s: hfa384x_setup_bap - timeout after\n",
811                        dev->name);
812                 ret = -ETIMEDOUT;
813                 goto out;
814         }
815 #ifndef final_version
816         if (HFA384X_INW(o_off) & HFA384X_OFFSET_ERR) {
817                 prism2_io_debug_error(dev, 9);
818                 printk(KERN_DEBUG "%s: hfa384x_setup_bap - offset error "
819                        "(%d,0x04%x,%d); reg=0x%04x\n",
820                        dev->name, bap, id, offset, HFA384X_INW(o_off));
821                 ret = -EINVAL;
822         }
823 #endif
824
825  out:
826         return ret;
827 }
828
829
830 static int hfa384x_get_rid(struct net_device *dev, u16 rid, void *buf, int len,
831                            int exact_len)
832 {
833         struct hostap_interface *iface;
834         local_info_t *local;
835         int res, rlen = 0;
836         struct hfa384x_rid_hdr rec;
837
838         iface = netdev_priv(dev);
839         local = iface->local;
840
841         if (local->no_pri) {
842                 printk(KERN_DEBUG "%s: cannot get RID %04x (len=%d) - no PRI "
843                        "f/w\n", dev->name, rid, len);
844                 return -ENOTTY; /* Well.. not really correct, but return
845                                  * something unique enough.. */
846         }
847
848         if ((local->func->card_present && !local->func->card_present(local)) ||
849             local->hw_downloading)
850                 return -ENODEV;
851
852         res = down_interruptible(&local->rid_bap_sem);
853         if (res)
854                 return res;
855
856         res = hfa384x_cmd(dev, HFA384X_CMDCODE_ACCESS, rid, NULL, NULL);
857         if (res) {
858                 printk(KERN_DEBUG "%s: hfa384x_get_rid: CMDCODE_ACCESS failed "
859                        "(res=%d, rid=%04x, len=%d)\n",
860                        dev->name, res, rid, len);
861                 up(&local->rid_bap_sem);
862                 return res;
863         }
864
865         spin_lock_bh(&local->baplock);
866
867         res = hfa384x_setup_bap(dev, BAP0, rid, 0);
868         if (!res)
869                 res = hfa384x_from_bap(dev, BAP0, &rec, sizeof(rec));
870
871         if (le16_to_cpu(rec.len) == 0) {
872                 /* RID not available */
873                 res = -ENODATA;
874         }
875
876         rlen = (le16_to_cpu(rec.len) - 1) * 2;
877         if (!res && exact_len && rlen != len) {
878                 printk(KERN_DEBUG "%s: hfa384x_get_rid - RID len mismatch: "
879                        "rid=0x%04x, len=%d (expected %d)\n",
880                        dev->name, rid, rlen, len);
881                 res = -ENODATA;
882         }
883
884         if (!res)
885                 res = hfa384x_from_bap(dev, BAP0, buf, len);
886
887         spin_unlock_bh(&local->baplock);
888         up(&local->rid_bap_sem);
889
890         if (res) {
891                 if (res != -ENODATA)
892                         printk(KERN_DEBUG "%s: hfa384x_get_rid (rid=%04x, "
893                                "len=%d) - failed - res=%d\n", dev->name, rid,
894                                len, res);
895                 if (res == -ETIMEDOUT)
896                         prism2_hw_reset(dev);
897                 return res;
898         }
899
900         return rlen;
901 }
902
903
904 static int hfa384x_set_rid(struct net_device *dev, u16 rid, void *buf, int len)
905 {
906         struct hostap_interface *iface;
907         local_info_t *local;
908         struct hfa384x_rid_hdr rec;
909         int res;
910
911         iface = netdev_priv(dev);
912         local = iface->local;
913
914         if (local->no_pri) {
915                 printk(KERN_DEBUG "%s: cannot set RID %04x (len=%d) - no PRI "
916                        "f/w\n", dev->name, rid, len);
917                 return -ENOTTY; /* Well.. not really correct, but return
918                                  * something unique enough.. */
919         }
920
921         if ((local->func->card_present && !local->func->card_present(local)) ||
922             local->hw_downloading)
923                 return -ENODEV;
924
925         rec.rid = cpu_to_le16(rid);
926         /* RID len in words and +1 for rec.rid */
927         rec.len = cpu_to_le16(len / 2 + len % 2 + 1);
928
929         res = down_interruptible(&local->rid_bap_sem);
930         if (res)
931                 return res;
932
933         spin_lock_bh(&local->baplock);
934         res = hfa384x_setup_bap(dev, BAP0, rid, 0);
935         if (!res)
936                 res = hfa384x_to_bap(dev, BAP0, &rec, sizeof(rec));
937         if (!res)
938                 res = hfa384x_to_bap(dev, BAP0, buf, len);
939         spin_unlock_bh(&local->baplock);
940
941         if (res) {
942                 printk(KERN_DEBUG "%s: hfa384x_set_rid (rid=%04x, len=%d) - "
943                        "failed - res=%d\n", dev->name, rid, len, res);
944                 up(&local->rid_bap_sem);
945                 return res;
946         }
947
948         res = hfa384x_cmd(dev, HFA384X_CMDCODE_ACCESS_WRITE, rid, NULL, NULL);
949         up(&local->rid_bap_sem);
950         if (res) {
951                 printk(KERN_DEBUG "%s: hfa384x_set_rid: CMDCODE_ACCESS_WRITE "
952                        "failed (res=%d, rid=%04x, len=%d)\n",
953                        dev->name, res, rid, len);
954                 return res;
955         }
956
957         if (res == -ETIMEDOUT)
958                 prism2_hw_reset(dev);
959
960         return res;
961 }
962
963
964 static void hfa384x_disable_interrupts(struct net_device *dev)
965 {
966         /* disable interrupts and clear event status */
967         HFA384X_OUTW(0, HFA384X_INTEN_OFF);
968         HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
969 }
970
971
972 static void hfa384x_enable_interrupts(struct net_device *dev)
973 {
974         /* ack pending events and enable interrupts from selected events */
975         HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
976         HFA384X_OUTW(HFA384X_EVENT_MASK, HFA384X_INTEN_OFF);
977 }
978
979
980 static void hfa384x_events_no_bap0(struct net_device *dev)
981 {
982         HFA384X_OUTW(HFA384X_EVENT_MASK & ~HFA384X_BAP0_EVENTS,
983                      HFA384X_INTEN_OFF);
984 }
985
986
987 static void hfa384x_events_all(struct net_device *dev)
988 {
989         HFA384X_OUTW(HFA384X_EVENT_MASK, HFA384X_INTEN_OFF);
990 }
991
992
993 static void hfa384x_events_only_cmd(struct net_device *dev)
994 {
995         HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_INTEN_OFF);
996 }
997
998
999 static u16 hfa384x_allocate_fid(struct net_device *dev, int len)
1000 {
1001         u16 fid;
1002         unsigned long delay;
1003
1004         /* FIX: this could be replace with hfa384x_cmd() if the Alloc event
1005          * below would be handled like CmdCompl event (sleep here, wake up from
1006          * interrupt handler */
1007         if (hfa384x_cmd_wait(dev, HFA384X_CMDCODE_ALLOC, len)) {
1008                 printk(KERN_DEBUG "%s: cannot allocate fid, len=%d\n",
1009                        dev->name, len);
1010                 return 0xffff;
1011         }
1012
1013         delay = jiffies + HFA384X_ALLOC_COMPL_TIMEOUT;
1014         while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_ALLOC) &&
1015                time_before(jiffies, delay))
1016                 yield();
1017         if (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_ALLOC)) {
1018                 printk("%s: fid allocate, len=%d - timeout\n", dev->name, len);
1019                 return 0xffff;
1020         }
1021
1022         fid = HFA384X_INW(HFA384X_ALLOCFID_OFF);
1023         HFA384X_OUTW(HFA384X_EV_ALLOC, HFA384X_EVACK_OFF);
1024
1025         return fid;
1026 }
1027
1028
1029 static int prism2_reset_port(struct net_device *dev)
1030 {
1031         struct hostap_interface *iface;
1032         local_info_t *local;
1033         int res;
1034
1035         iface = netdev_priv(dev);
1036         local = iface->local;
1037
1038         if (!local->dev_enabled)
1039                 return 0;
1040
1041         res = hfa384x_cmd(dev, HFA384X_CMDCODE_DISABLE, 0,
1042                           NULL, NULL);
1043         if (res)
1044                 printk(KERN_DEBUG "%s: reset port failed to disable port\n",
1045                        dev->name);
1046         else {
1047                 res = hfa384x_cmd(dev, HFA384X_CMDCODE_ENABLE, 0,
1048                                   NULL, NULL);
1049                 if (res)
1050                         printk(KERN_DEBUG "%s: reset port failed to enable "
1051                                "port\n", dev->name);
1052         }
1053
1054         /* It looks like at least some STA firmware versions reset
1055          * fragmentation threshold back to 2346 after enable command. Restore
1056          * the configured value, if it differs from this default. */
1057         if (local->fragm_threshold != 2346 &&
1058             hostap_set_word(dev, HFA384X_RID_FRAGMENTATIONTHRESHOLD,
1059                             local->fragm_threshold)) {
1060                 printk(KERN_DEBUG "%s: failed to restore fragmentation "
1061                        "threshold (%d) after Port0 enable\n",
1062                        dev->name, local->fragm_threshold);
1063         }
1064
1065         return res;
1066 }
1067
1068
1069 static int prism2_get_version_info(struct net_device *dev, u16 rid,
1070                                    const char *txt)
1071 {
1072         struct hfa384x_comp_ident comp;
1073         struct hostap_interface *iface;
1074         local_info_t *local;
1075
1076         iface = netdev_priv(dev);
1077         local = iface->local;
1078
1079         if (local->no_pri) {
1080                 /* PRI f/w not yet available - cannot read RIDs */
1081                 return -1;
1082         }
1083         if (hfa384x_get_rid(dev, rid, &comp, sizeof(comp), 1) < 0) {
1084                 printk(KERN_DEBUG "Could not get RID for component %s\n", txt);
1085                 return -1;
1086         }
1087
1088         printk(KERN_INFO "%s: %s: id=0x%02x v%d.%d.%d\n", dev->name, txt,
1089                __le16_to_cpu(comp.id), __le16_to_cpu(comp.major),
1090                __le16_to_cpu(comp.minor), __le16_to_cpu(comp.variant));
1091         return 0;
1092 }
1093
1094
1095 static int prism2_setup_rids(struct net_device *dev)
1096 {
1097         struct hostap_interface *iface;
1098         local_info_t *local;
1099         u16 tmp;
1100         int ret = 0;
1101
1102         iface = netdev_priv(dev);
1103         local = iface->local;
1104
1105         hostap_set_word(dev, HFA384X_RID_TICKTIME, 2000);
1106
1107         if (!local->fw_ap) {
1108                 tmp = hostap_get_porttype(local);
1109                 ret = hostap_set_word(dev, HFA384X_RID_CNFPORTTYPE, tmp);
1110                 if (ret) {
1111                         printk("%s: Port type setting to %d failed\n",
1112                                dev->name, tmp);
1113                         goto fail;
1114                 }
1115         }
1116
1117         /* Setting SSID to empty string seems to kill the card in Host AP mode
1118          */
1119         if (local->iw_mode != IW_MODE_MASTER || local->essid[0] != '\0') {
1120                 ret = hostap_set_string(dev, HFA384X_RID_CNFOWNSSID,
1121                                         local->essid);
1122                 if (ret) {
1123                         printk("%s: AP own SSID setting failed\n", dev->name);
1124                         goto fail;
1125                 }
1126         }
1127
1128         ret = hostap_set_word(dev, HFA384X_RID_CNFMAXDATALEN,
1129                               PRISM2_DATA_MAXLEN);
1130         if (ret) {
1131                 printk("%s: MAC data length setting to %d failed\n",
1132                        dev->name, PRISM2_DATA_MAXLEN);
1133                 goto fail;
1134         }
1135
1136         if (hfa384x_get_rid(dev, HFA384X_RID_CHANNELLIST, &tmp, 2, 1) < 0) {
1137                 printk("%s: Channel list read failed\n", dev->name);
1138                 ret = -EINVAL;
1139                 goto fail;
1140         }
1141         local->channel_mask = __le16_to_cpu(tmp);
1142
1143         if (local->channel < 1 || local->channel > 14 ||
1144             !(local->channel_mask & (1 << (local->channel - 1)))) {
1145                 printk(KERN_WARNING "%s: Channel setting out of range "
1146                        "(%d)!\n", dev->name, local->channel);
1147                 ret = -EBUSY;
1148                 goto fail;
1149         }
1150
1151         ret = hostap_set_word(dev, HFA384X_RID_CNFOWNCHANNEL, local->channel);
1152         if (ret) {
1153                 printk("%s: Channel setting to %d failed\n",
1154                        dev->name, local->channel);
1155                 goto fail;
1156         }
1157
1158         ret = hostap_set_word(dev, HFA384X_RID_CNFBEACONINT,
1159                               local->beacon_int);
1160         if (ret) {
1161                 printk("%s: Beacon interval setting to %d failed\n",
1162                        dev->name, local->beacon_int);
1163                 /* this may fail with Symbol/Lucent firmware */
1164                 if (ret == -ETIMEDOUT)
1165                         goto fail;
1166         }
1167
1168         ret = hostap_set_word(dev, HFA384X_RID_CNFOWNDTIMPERIOD,
1169                               local->dtim_period);
1170         if (ret) {
1171                 printk("%s: DTIM period setting to %d failed\n",
1172                        dev->name, local->dtim_period);
1173                 /* this may fail with Symbol/Lucent firmware */
1174                 if (ret == -ETIMEDOUT)
1175                         goto fail;
1176         }
1177
1178         ret = hostap_set_word(dev, HFA384X_RID_PROMISCUOUSMODE,
1179                               local->is_promisc);
1180         if (ret)
1181                 printk(KERN_INFO "%s: Setting promiscuous mode (%d) failed\n",
1182                        dev->name, local->is_promisc);
1183
1184         if (!local->fw_ap) {
1185                 ret = hostap_set_string(dev, HFA384X_RID_CNFDESIREDSSID,
1186                                         local->essid);
1187                 if (ret) {
1188                         printk("%s: Desired SSID setting failed\n", dev->name);
1189                         goto fail;
1190                 }
1191         }
1192
1193         /* Setup TXRateControl, defaults to allow use of 1, 2, 5.5, and
1194          * 11 Mbps in automatic TX rate fallback and 1 and 2 Mbps as basic
1195          * rates */
1196         if (local->tx_rate_control == 0) {
1197                 local->tx_rate_control =
1198                         HFA384X_RATES_1MBPS |
1199                         HFA384X_RATES_2MBPS |
1200                         HFA384X_RATES_5MBPS |
1201                         HFA384X_RATES_11MBPS;
1202         }
1203         if (local->basic_rates == 0)
1204                 local->basic_rates = HFA384X_RATES_1MBPS | HFA384X_RATES_2MBPS;
1205
1206         if (!local->fw_ap) {
1207                 ret = hostap_set_word(dev, HFA384X_RID_TXRATECONTROL,
1208                                       local->tx_rate_control);
1209                 if (ret) {
1210                         printk("%s: TXRateControl setting to %d failed\n",
1211                                dev->name, local->tx_rate_control);
1212                         goto fail;
1213                 }
1214
1215                 ret = hostap_set_word(dev, HFA384X_RID_CNFSUPPORTEDRATES,
1216                                       local->tx_rate_control);
1217                 if (ret) {
1218                         printk("%s: cnfSupportedRates setting to %d failed\n",
1219                                dev->name, local->tx_rate_control);
1220                 }
1221
1222                 ret = hostap_set_word(dev, HFA384X_RID_CNFBASICRATES,
1223                                       local->basic_rates);
1224                 if (ret) {
1225                         printk("%s: cnfBasicRates setting to %d failed\n",
1226                                dev->name, local->basic_rates);
1227                 }
1228
1229                 ret = hostap_set_word(dev, HFA384X_RID_CREATEIBSS, 1);
1230                 if (ret) {
1231                         printk("%s: Create IBSS setting to 1 failed\n",
1232                                dev->name);
1233                 }
1234         }
1235
1236         if (local->name_set)
1237                 (void) hostap_set_string(dev, HFA384X_RID_CNFOWNNAME,
1238                                          local->name);
1239
1240         if (hostap_set_encryption(local)) {
1241                 printk(KERN_INFO "%s: could not configure encryption\n",
1242                        dev->name);
1243         }
1244
1245         (void) hostap_set_antsel(local);
1246
1247         if (hostap_set_roaming(local)) {
1248                 printk(KERN_INFO "%s: could not set host roaming\n",
1249                        dev->name);
1250         }
1251
1252         if (local->sta_fw_ver >= PRISM2_FW_VER(1,6,3) &&
1253             hostap_set_word(dev, HFA384X_RID_CNFENHSECURITY, local->enh_sec))
1254                 printk(KERN_INFO "%s: cnfEnhSecurity setting to 0x%x failed\n",
1255                        dev->name, local->enh_sec);
1256
1257         /* 32-bit tallies were added in STA f/w 0.8.0, but they were apparently
1258          * not working correctly (last seven counters report bogus values).
1259          * This has been fixed in 0.8.2, so enable 32-bit tallies only
1260          * beginning with that firmware version. Another bug fix for 32-bit
1261          * tallies in 1.4.0; should 16-bit tallies be used for some other
1262          * versions, too? */
1263         if (local->sta_fw_ver >= PRISM2_FW_VER(0,8,2)) {
1264                 if (hostap_set_word(dev, HFA384X_RID_CNFTHIRTY2TALLY, 1)) {
1265                         printk(KERN_INFO "%s: cnfThirty2Tally setting "
1266                                "failed\n", dev->name);
1267                         local->tallies32 = 0;
1268                 } else
1269                         local->tallies32 = 1;
1270         } else
1271                 local->tallies32 = 0;
1272
1273         hostap_set_auth_algs(local);
1274
1275         if (hostap_set_word(dev, HFA384X_RID_FRAGMENTATIONTHRESHOLD,
1276                             local->fragm_threshold)) {
1277                 printk(KERN_INFO "%s: setting FragmentationThreshold to %d "
1278                        "failed\n", dev->name, local->fragm_threshold);
1279         }
1280
1281         if (hostap_set_word(dev, HFA384X_RID_RTSTHRESHOLD,
1282                             local->rts_threshold)) {
1283                 printk(KERN_INFO "%s: setting RTSThreshold to %d failed\n",
1284                        dev->name, local->rts_threshold);
1285         }
1286
1287         if (local->manual_retry_count >= 0 &&
1288             hostap_set_word(dev, HFA384X_RID_CNFALTRETRYCOUNT,
1289                             local->manual_retry_count)) {
1290                 printk(KERN_INFO "%s: setting cnfAltRetryCount to %d failed\n",
1291                        dev->name, local->manual_retry_count);
1292         }
1293
1294         if (local->sta_fw_ver >= PRISM2_FW_VER(1,3,1) &&
1295             hfa384x_get_rid(dev, HFA384X_RID_CNFDBMADJUST, &tmp, 2, 1) == 2) {
1296                 local->rssi_to_dBm = le16_to_cpu(tmp);
1297         }
1298
1299         if (local->sta_fw_ver >= PRISM2_FW_VER(1,7,0) && local->wpa &&
1300             hostap_set_word(dev, HFA384X_RID_SSNHANDLINGMODE, 1)) {
1301                 printk(KERN_INFO "%s: setting ssnHandlingMode to 1 failed\n",
1302                        dev->name);
1303         }
1304
1305         if (local->sta_fw_ver >= PRISM2_FW_VER(1,7,0) && local->generic_elem &&
1306             hfa384x_set_rid(dev, HFA384X_RID_GENERICELEMENT,
1307                             local->generic_elem, local->generic_elem_len)) {
1308                 printk(KERN_INFO "%s: setting genericElement failed\n",
1309                        dev->name);
1310         }
1311
1312  fail:
1313         return ret;
1314 }
1315
1316
1317 static int prism2_hw_init(struct net_device *dev, int initial)
1318 {
1319         struct hostap_interface *iface;
1320         local_info_t *local;
1321         int ret, first = 1;
1322         unsigned long start, delay;
1323
1324         PDEBUG(DEBUG_FLOW, "prism2_hw_init()\n");
1325
1326         iface = netdev_priv(dev);
1327         local = iface->local;
1328
1329         clear_bit(HOSTAP_BITS_TRANSMIT, &local->bits);
1330
1331  init:
1332         /* initialize HFA 384x */
1333         ret = hfa384x_cmd_no_wait(dev, HFA384X_CMDCODE_INIT, 0);
1334         if (ret) {
1335                 printk(KERN_INFO "%s: first command failed - assuming card "
1336                        "does not have primary firmware\n", dev_info);
1337         }
1338
1339         if (first && (HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD)) {
1340                 /* EvStat has Cmd bit set in some cases, so retry once if no
1341                  * wait was needed */
1342                 HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
1343                 printk(KERN_DEBUG "%s: init command completed too quickly - "
1344                        "retrying\n", dev->name);
1345                 first = 0;
1346                 goto init;
1347         }
1348
1349         start = jiffies;
1350         delay = jiffies + HFA384X_INIT_TIMEOUT;
1351         while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD) &&
1352                time_before(jiffies, delay))
1353                 yield();
1354         if (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD)) {
1355                 printk(KERN_DEBUG "%s: assuming no Primary image in "
1356                        "flash - card initialization not completed\n",
1357                        dev_info);
1358                 local->no_pri = 1;
1359 #ifdef PRISM2_DOWNLOAD_SUPPORT
1360                         if (local->sram_type == -1)
1361                                 local->sram_type = prism2_get_ram_size(local);
1362 #endif /* PRISM2_DOWNLOAD_SUPPORT */
1363                 return 1;
1364         }
1365         local->no_pri = 0;
1366         printk(KERN_DEBUG "prism2_hw_init: initialized in %lu ms\n",
1367                (jiffies - start) * 1000 / HZ);
1368         HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);
1369         return 0;
1370 }
1371
1372
1373 static int prism2_hw_init2(struct net_device *dev, int initial)
1374 {
1375         struct hostap_interface *iface;
1376         local_info_t *local;
1377         int i;
1378
1379         iface = netdev_priv(dev);
1380         local = iface->local;
1381
1382 #ifdef PRISM2_DOWNLOAD_SUPPORT
1383         kfree(local->pda);
1384         if (local->no_pri)
1385                 local->pda = NULL;
1386         else
1387                 local->pda = prism2_read_pda(dev);
1388 #endif /* PRISM2_DOWNLOAD_SUPPORT */
1389
1390         hfa384x_disable_interrupts(dev);
1391
1392 #ifndef final_version
1393         HFA384X_OUTW(HFA384X_MAGIC, HFA384X_SWSUPPORT0_OFF);
1394         if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != HFA384X_MAGIC) {
1395                 printk("SWSUPPORT0 write/read failed: %04X != %04X\n",
1396                        HFA384X_INW(HFA384X_SWSUPPORT0_OFF), HFA384X_MAGIC);
1397                 goto failed;
1398         }
1399 #endif
1400
1401         if (initial || local->pri_only) {
1402                 hfa384x_events_only_cmd(dev);
1403                 /* get card version information */
1404                 if (prism2_get_version_info(dev, HFA384X_RID_NICID, "NIC") ||
1405                     prism2_get_version_info(dev, HFA384X_RID_PRIID, "PRI")) {
1406                         hfa384x_disable_interrupts(dev);
1407                         goto failed;
1408                 }
1409
1410                 if (prism2_get_version_info(dev, HFA384X_RID_STAID, "STA")) {
1411                         printk(KERN_DEBUG "%s: Failed to read STA f/w version "
1412                                "- only Primary f/w present\n", dev->name);
1413                         local->pri_only = 1;
1414                         return 0;
1415                 }
1416                 local->pri_only = 0;
1417                 hfa384x_disable_interrupts(dev);
1418         }
1419
1420         /* FIX: could convert allocate_fid to use sleeping CmdCompl wait and
1421          * enable interrupts before this. This would also require some sort of
1422          * sleeping AllocEv waiting */
1423
1424         /* allocate TX FIDs */
1425         local->txfid_len = PRISM2_TXFID_LEN;
1426         for (i = 0; i < PRISM2_TXFID_COUNT; i++) {
1427                 local->txfid[i] = hfa384x_allocate_fid(dev, local->txfid_len);
1428                 if (local->txfid[i] == 0xffff && local->txfid_len > 1600) {
1429                         local->txfid[i] = hfa384x_allocate_fid(dev, 1600);
1430                         if (local->txfid[i] != 0xffff) {
1431                                 printk(KERN_DEBUG "%s: Using shorter TX FID "
1432                                        "(1600 bytes)\n", dev->name);
1433                                 local->txfid_len = 1600;
1434                         }
1435                 }
1436                 if (local->txfid[i] == 0xffff)
1437                         goto failed;
1438                 local->intransmitfid[i] = PRISM2_TXFID_EMPTY;
1439         }
1440
1441         hfa384x_events_only_cmd(dev);
1442
1443         if (initial) {
1444                 struct list_head *ptr;
1445                 prism2_check_sta_fw_version(local);
1446
1447                 if (hfa384x_get_rid(dev, HFA384X_RID_CNFOWNMACADDR,
1448                                     &dev->dev_addr, 6, 1) < 0) {
1449                         printk("%s: could not get own MAC address\n",
1450                                dev->name);
1451                 }
1452                 list_for_each(ptr, &local->hostap_interfaces) {
1453                         iface = list_entry(ptr, struct hostap_interface, list);
1454                         memcpy(iface->dev->dev_addr, dev->dev_addr, ETH_ALEN);
1455                 }
1456         } else if (local->fw_ap)
1457                 prism2_check_sta_fw_version(local);
1458
1459         prism2_setup_rids(dev);
1460
1461         /* MAC is now configured, but port 0 is not yet enabled */
1462         return 0;
1463
1464  failed:
1465         if (!local->no_pri)
1466                 printk(KERN_WARNING "%s: Initialization failed\n", dev_info);
1467         return 1;
1468 }
1469
1470
1471 static int prism2_hw_enable(struct net_device *dev, int initial)
1472 {
1473         struct hostap_interface *iface;
1474         local_info_t *local;
1475         int was_resetting;
1476
1477         iface = netdev_priv(dev);
1478         local = iface->local;
1479         was_resetting = local->hw_resetting;
1480
1481         if (hfa384x_cmd(dev, HFA384X_CMDCODE_ENABLE, 0, NULL, NULL)) {
1482                 printk("%s: MAC port 0 enabling failed\n", dev->name);
1483                 return 1;
1484         }
1485
1486         local->hw_ready = 1;
1487         local->hw_reset_tries = 0;
1488         local->hw_resetting = 0;
1489         hfa384x_enable_interrupts(dev);
1490
1491         /* at least D-Link DWL-650 seems to require additional port reset
1492          * before it starts acting as an AP, so reset port automatically
1493          * here just in case */
1494         if (initial && prism2_reset_port(dev)) {
1495                 printk("%s: MAC port 0 reseting failed\n", dev->name);
1496                 return 1;
1497         }
1498
1499         if (was_resetting && netif_queue_stopped(dev)) {
1500                 /* If hw_reset() was called during pending transmit, netif
1501                  * queue was stopped. Wake it up now since the wlan card has
1502                  * been resetted. */
1503                 netif_wake_queue(dev);
1504         }
1505
1506         return 0;
1507 }
1508
1509
1510 static int prism2_hw_config(struct net_device *dev, int initial)
1511 {
1512         struct hostap_interface *iface;
1513         local_info_t *local;
1514
1515         iface = netdev_priv(dev);
1516         local = iface->local;
1517
1518         if (local->hw_downloading)
1519                 return 1;
1520
1521         if (prism2_hw_init(dev, initial)) {
1522                 return local->no_pri ? 0 : 1;
1523         }
1524
1525         if (prism2_hw_init2(dev, initial))
1526                 return 1;
1527
1528         /* Enable firmware if secondary image is loaded and at least one of the
1529          * netdevices is up. */
1530         if (!local->pri_only &&
1531             (initial == 0 || (initial == 2 && local->num_dev_open > 0))) {
1532                 if (!local->dev_enabled)
1533                         prism2_callback(local, PRISM2_CALLBACK_ENABLE);
1534                 local->dev_enabled = 1;
1535                 return prism2_hw_enable(dev, initial);
1536         }
1537
1538         return 0;
1539 }
1540
1541
1542 static void prism2_hw_shutdown(struct net_device *dev, int no_disable)
1543 {
1544         struct hostap_interface *iface;
1545         local_info_t *local;
1546
1547         iface = netdev_priv(dev);
1548         local = iface->local;
1549
1550         /* Allow only command completion events during disable */
1551         hfa384x_events_only_cmd(dev);
1552
1553         local->hw_ready = 0;
1554         if (local->dev_enabled)
1555                 prism2_callback(local, PRISM2_CALLBACK_DISABLE);
1556         local->dev_enabled = 0;
1557
1558         if (local->func->card_present && !local->func->card_present(local)) {
1559                 printk(KERN_DEBUG "%s: card already removed or not configured "
1560                        "during shutdown\n", dev->name);
1561                 return;
1562         }
1563
1564         if ((no_disable & HOSTAP_HW_NO_DISABLE) == 0 &&
1565             hfa384x_cmd(dev, HFA384X_CMDCODE_DISABLE, 0, NULL, NULL))
1566                 printk(KERN_WARNING "%s: Shutdown failed\n", dev_info);
1567
1568         hfa384x_disable_interrupts(dev);
1569
1570         if (no_disable & HOSTAP_HW_ENABLE_CMDCOMPL)
1571                 hfa384x_events_only_cmd(dev);
1572         else
1573                 prism2_clear_cmd_queue(local);
1574 }
1575
1576
1577 static void prism2_hw_reset(struct net_device *dev)
1578 {
1579         struct hostap_interface *iface;
1580         local_info_t *local;
1581
1582 #if 0
1583         static long last_reset = 0;
1584
1585         /* do not reset card more than once per second to avoid ending up in a
1586          * busy loop reseting the card */
1587         if (time_before_eq(jiffies, last_reset + HZ))
1588                 return;
1589         last_reset = jiffies;
1590 #endif
1591
1592         iface = netdev_priv(dev);
1593         local = iface->local;
1594
1595         if (in_interrupt()) {
1596                 printk(KERN_DEBUG "%s: driver bug - prism2_hw_reset() called "
1597                        "in interrupt context\n", dev->name);
1598                 return;
1599         }
1600
1601         if (local->hw_downloading)
1602                 return;
1603
1604         if (local->hw_resetting) {
1605                 printk(KERN_WARNING "%s: %s: already resetting card - "
1606                        "ignoring reset request\n", dev_info, dev->name);
1607                 return;
1608         }
1609
1610         local->hw_reset_tries++;
1611         if (local->hw_reset_tries > 10) {
1612                 printk(KERN_WARNING "%s: too many reset tries, skipping\n",
1613                        dev->name);
1614                 return;
1615         }
1616
1617         printk(KERN_WARNING "%s: %s: resetting card\n", dev_info, dev->name);
1618         hfa384x_disable_interrupts(dev);
1619         local->hw_resetting = 1;
1620         if (local->func->cor_sreset) {
1621                 /* Host system seems to hang in some cases with high traffic
1622                  * load or shared interrupts during COR sreset. Disable shared
1623                  * interrupts during reset to avoid these crashes. COS sreset
1624                  * takes quite a long time, so it is unfortunate that this
1625                  * seems to be needed. Anyway, I do not know of any better way
1626                  * of avoiding the crash. */
1627                 disable_irq(dev->irq);
1628                 local->func->cor_sreset(local);
1629                 enable_irq(dev->irq);
1630         }
1631         prism2_hw_shutdown(dev, 1);
1632         prism2_hw_config(dev, 0);
1633         local->hw_resetting = 0;
1634
1635 #ifdef PRISM2_DOWNLOAD_SUPPORT
1636         if (local->dl_pri) {
1637                 printk(KERN_DEBUG "%s: persistent download of primary "
1638                        "firmware\n", dev->name);
1639                 if (prism2_download_genesis(local, local->dl_pri) < 0)
1640                         printk(KERN_WARNING "%s: download (PRI) failed\n",
1641                                dev->name);
1642         }
1643
1644         if (local->dl_sec) {
1645                 printk(KERN_DEBUG "%s: persistent download of secondary "
1646                        "firmware\n", dev->name);
1647                 if (prism2_download_volatile(local, local->dl_sec) < 0)
1648                         printk(KERN_WARNING "%s: download (SEC) failed\n",
1649                                dev->name);
1650         }
1651 #endif /* PRISM2_DOWNLOAD_SUPPORT */
1652
1653         /* TODO: restore beacon TIM bits for STAs that have buffered frames */
1654 }
1655
1656
1657 static void prism2_schedule_reset(local_info_t *local)
1658 {
1659         schedule_work(&local->reset_queue);
1660 }
1661
1662
1663 /* Called only as scheduled task after noticing card timeout in interrupt
1664  * context */
1665 static void handle_reset_queue(void *data)
1666 {
1667         local_info_t *local = (local_info_t *) data;
1668
1669         printk(KERN_DEBUG "%s: scheduled card reset\n", local->dev->name);
1670         prism2_hw_reset(local->dev);
1671
1672         if (netif_queue_stopped(local->dev)) {
1673                 int i;
1674
1675                 for (i = 0; i < PRISM2_TXFID_COUNT; i++)
1676                         if (local->intransmitfid[i] == PRISM2_TXFID_EMPTY) {
1677                                 PDEBUG(DEBUG_EXTRA, "prism2_tx_timeout: "
1678                                        "wake up queue\n");
1679                                 netif_wake_queue(local->dev);
1680                                 break;
1681                         }
1682         }
1683 }
1684
1685
1686 static int prism2_get_txfid_idx(local_info_t *local)
1687 {
1688         int idx, end;
1689         unsigned long flags;
1690
1691         spin_lock_irqsave(&local->txfidlock, flags);
1692         end = idx = local->next_txfid;
1693         do {
1694                 if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY) {
1695                         local->intransmitfid[idx] = PRISM2_TXFID_RESERVED;
1696                         spin_unlock_irqrestore(&local->txfidlock, flags);
1697                         return idx;
1698                 }
1699                 idx++;
1700                 if (idx >= PRISM2_TXFID_COUNT)
1701                         idx = 0;
1702         } while (idx != end);
1703         spin_unlock_irqrestore(&local->txfidlock, flags);
1704
1705         PDEBUG(DEBUG_EXTRA2, "prism2_get_txfid_idx: no room in txfid buf: "
1706                "packet dropped\n");
1707         local->stats.tx_dropped++;
1708
1709         return -1;
1710 }
1711
1712
1713 /* Called only from hardware IRQ */
1714 static void prism2_transmit_cb(struct net_device *dev, long context,
1715                                u16 resp0, u16 res)
1716 {
1717         struct hostap_interface *iface;
1718         local_info_t *local;
1719         int idx = (int) context;
1720
1721         iface = netdev_priv(dev);
1722         local = iface->local;
1723
1724         if (res) {
1725                 printk(KERN_DEBUG "%s: prism2_transmit_cb - res=0x%02x\n",
1726                        dev->name, res);
1727                 return;
1728         }
1729
1730         if (idx < 0 || idx >= PRISM2_TXFID_COUNT) {
1731                 printk(KERN_DEBUG "%s: prism2_transmit_cb called with invalid "
1732                        "idx=%d\n", dev->name, idx);
1733                 return;
1734         }
1735
1736         if (!test_and_clear_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
1737                 printk(KERN_DEBUG "%s: driver bug: prism2_transmit_cb called "
1738                        "with no pending transmit\n", dev->name);
1739         }
1740
1741         if (netif_queue_stopped(dev)) {
1742                 /* ready for next TX, so wake up queue that was stopped in
1743                  * prism2_transmit() */
1744                 netif_wake_queue(dev);
1745         }
1746
1747         spin_lock(&local->txfidlock);
1748
1749         /* With reclaim, Resp0 contains new txfid for transmit; the old txfid
1750          * will be automatically allocated for the next TX frame */
1751         local->intransmitfid[idx] = resp0;
1752
1753         PDEBUG(DEBUG_FID, "%s: prism2_transmit_cb: txfid[%d]=0x%04x, "
1754                "resp0=0x%04x, transmit_txfid=0x%04x\n",
1755                dev->name, idx, local->txfid[idx],
1756                resp0, local->intransmitfid[local->next_txfid]);
1757
1758         idx++;
1759         if (idx >= PRISM2_TXFID_COUNT)
1760                 idx = 0;
1761         local->next_txfid = idx;
1762
1763         /* check if all TX buffers are occupied */
1764         do {
1765                 if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY) {
1766                         spin_unlock(&local->txfidlock);
1767                         return;
1768                 }
1769                 idx++;
1770                 if (idx >= PRISM2_TXFID_COUNT)
1771                         idx = 0;
1772         } while (idx != local->next_txfid);
1773         spin_unlock(&local->txfidlock);
1774
1775         /* no empty TX buffers, stop queue */
1776         netif_stop_queue(dev);
1777 }
1778
1779
1780 /* Called only from software IRQ if PCI bus master is not used (with bus master
1781  * this can be called both from software and hardware IRQ) */
1782 static int prism2_transmit(struct net_device *dev, int idx)
1783 {
1784         struct hostap_interface *iface;
1785         local_info_t *local;
1786         int res;
1787
1788         iface = netdev_priv(dev);
1789         local = iface->local;
1790
1791         /* The driver tries to stop netif queue so that there would not be
1792          * more than one attempt to transmit frames going on; check that this
1793          * is really the case */
1794
1795         if (test_and_set_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
1796                 printk(KERN_DEBUG "%s: driver bug - prism2_transmit() called "
1797                        "when previous TX was pending\n", dev->name);
1798                 return -1;
1799         }
1800
1801         /* stop the queue for the time that transmit is pending */
1802         netif_stop_queue(dev);
1803
1804         /* transmit packet */
1805         res = hfa384x_cmd_callback(
1806                 dev,
1807                 HFA384X_CMDCODE_TRANSMIT | HFA384X_CMD_TX_RECLAIM,
1808                 local->txfid[idx],
1809                 prism2_transmit_cb, (long) idx);
1810
1811         if (res) {
1812                 struct net_device_stats *stats;
1813                 printk(KERN_DEBUG "%s: prism2_transmit: CMDCODE_TRANSMIT "
1814                        "failed (res=%d)\n", dev->name, res);
1815                 stats = hostap_get_stats(dev);
1816                 stats->tx_dropped++;
1817                 netif_wake_queue(dev);
1818                 return -1;
1819         }
1820         dev->trans_start = jiffies;
1821
1822         /* Since we did not wait for command completion, the card continues
1823          * to process on the background and we will finish handling when
1824          * command completion event is handled (prism2_cmd_ev() function) */
1825
1826         return 0;
1827 }
1828
1829
1830 #if defined(PRISM2_PCI) && defined(PRISM2_BUS_MASTER)
1831 /* Called only from hardware IRQ */
1832 static void prism2_tx_cb(struct net_device *dev, void *context,
1833                          u16 resp0, u16 res)
1834 {
1835         struct hostap_interface *iface;
1836         local_info_t *local;
1837         unsigned long addr;
1838         int buf_len = (int) context;
1839
1840         iface = netdev_priv(dev);
1841         local = iface->local;
1842
1843         if (res) {
1844                 printk(KERN_DEBUG "%s: prism2_tx_cb - res=0x%02x\n",
1845                        dev->name, res);
1846                 return;
1847         }
1848
1849         addr = virt_to_phys(local->bus_m0_buf);
1850         HFA384X_OUTW((addr & 0xffff0000) >> 16, HFA384X_PCI_M0_ADDRH_OFF);
1851         HFA384X_OUTW(addr & 0x0000ffff, HFA384X_PCI_M0_ADDRL_OFF);
1852         HFA384X_OUTW(buf_len / 2, HFA384X_PCI_M0_LEN_OFF);
1853         HFA384X_OUTW(HFA384X_PCI_CTL_TO_BAP, HFA384X_PCI_M0_CTL_OFF);
1854 }
1855 #endif /* PRISM2_PCI and PRISM2_BUS_MASTER */
1856
1857
1858 /* Send IEEE 802.11 frame (convert the header into Prism2 TX descriptor and
1859  * send the payload with this descriptor) */
1860 /* Called only from software IRQ */
1861 static int prism2_tx_80211(struct sk_buff *skb, struct net_device *dev)
1862 {
1863         struct hostap_interface *iface;
1864         local_info_t *local;
1865         struct hfa384x_tx_frame txdesc;
1866         struct hostap_ieee80211_hdr *hdr;
1867         struct hostap_skb_tx_data *meta;
1868         int hdr_len, data_len, idx, res, ret = -1;
1869         u16 tx_control, fc;
1870
1871         iface = netdev_priv(dev);
1872         local = iface->local;
1873
1874         meta = (struct hostap_skb_tx_data *) skb->cb;
1875         hdr = (struct hostap_ieee80211_hdr *) skb->data;
1876
1877         prism2_callback(local, PRISM2_CALLBACK_TX_START);
1878
1879         if ((local->func->card_present && !local->func->card_present(local)) ||
1880             !local->hw_ready || local->hw_downloading || local->pri_only) {
1881                 if (net_ratelimit()) {
1882                         printk(KERN_DEBUG "%s: prism2_tx_80211: hw not ready -"
1883                                " skipping\n", dev->name);
1884                 }
1885                 goto fail;
1886         }
1887
1888         memset(&txdesc, 0, sizeof(txdesc));
1889
1890         /* skb->data starts with txdesc->frame_control */
1891         hdr_len = 24;
1892         memcpy(&txdesc.frame_control, skb->data, hdr_len);
1893         fc = le16_to_cpu(txdesc.frame_control);
1894         if (HOSTAP_FC_GET_TYPE(fc) == WLAN_FC_TYPE_DATA &&
1895             (fc & WLAN_FC_FROMDS) && (fc & WLAN_FC_TODS) && skb->len >= 30) {
1896                 /* Addr4 */
1897                 memcpy(txdesc.addr4, skb->data + hdr_len, ETH_ALEN);
1898                 hdr_len += ETH_ALEN;
1899         }
1900
1901         tx_control = local->tx_control;
1902         if (meta->tx_cb_idx) {
1903                 tx_control |= HFA384X_TX_CTRL_TX_OK;
1904                 txdesc.sw_support = cpu_to_le16(meta->tx_cb_idx);
1905         }
1906         txdesc.tx_control = cpu_to_le16(tx_control);
1907         txdesc.tx_rate = meta->rate;
1908
1909         data_len = skb->len - hdr_len;
1910         txdesc.data_len = cpu_to_le16(data_len);
1911         txdesc.len = cpu_to_be16(data_len);
1912
1913         idx = prism2_get_txfid_idx(local);
1914         if (idx < 0)
1915                 goto fail;
1916
1917         if (local->frame_dump & PRISM2_DUMP_TX_HDR)
1918                 hostap_dump_tx_header(dev->name, &txdesc);
1919
1920         spin_lock(&local->baplock);
1921         res = hfa384x_setup_bap(dev, BAP0, local->txfid[idx], 0);
1922
1923 #if defined(PRISM2_PCI) && defined(PRISM2_BUS_MASTER)
1924         if (!res && skb->len >= local->bus_master_threshold_tx) {
1925                 u8 *pos;
1926                 int buf_len;
1927
1928                 local->bus_m0_tx_idx = idx;
1929
1930                 /* FIX: BAP0 should be locked during bus master transfer, but
1931                  * baplock with BH's disabled is not OK for this; netif queue
1932                  * stopping is not enough since BAP0 is used also for RID
1933                  * read/write */
1934
1935                 /* stop the queue for the time that bus mastering on BAP0 is
1936                  * in use */
1937                 netif_stop_queue(dev);
1938
1939                 spin_unlock(&local->baplock);
1940
1941                 /* Copy frame data to bus_m0_buf */
1942                 pos = local->bus_m0_buf;
1943                 memcpy(pos, &txdesc, sizeof(txdesc));
1944                 pos += sizeof(txdesc);
1945                 memcpy(pos, skb->data + hdr_len, skb->len - hdr_len);
1946                 pos += skb->len - hdr_len;
1947                 buf_len = pos - local->bus_m0_buf;
1948                 if (buf_len & 1)
1949                         buf_len++;
1950
1951 #ifdef PRISM2_ENABLE_BEFORE_TX_BUS_MASTER
1952                 /* Any RX packet seems to break something with TX bus
1953                  * mastering; enable command is enough to fix this.. */
1954                 if (hfa384x_cmd_callback(dev, HFA384X_CMDCODE_ENABLE, 0,
1955                                          prism2_tx_cb, (long) buf_len)) {
1956                         printk(KERN_DEBUG "%s: TX: enable port0 failed\n",
1957                                dev->name);
1958                 }
1959 #else /* PRISM2_ENABLE_BEFORE_TX_BUS_MASTER */
1960                 prism2_tx_cb(dev, (void *) buf_len, 0, 0);
1961 #endif /* PRISM2_ENABLE_BEFORE_TX_BUS_MASTER */
1962
1963                 /* Bus master transfer will be started from command completion
1964                  * event handler and TX handling will be finished by calling
1965                  * prism2_transmit() from bus master event handler */
1966                 goto tx_stats;
1967         }
1968 #endif /* PRISM2_PCI and PRISM2_BUS_MASTER */
1969
1970         if (!res)
1971                 res = hfa384x_to_bap(dev, BAP0, &txdesc, sizeof(txdesc));
1972         if (!res)
1973                 res = hfa384x_to_bap(dev, BAP0, skb->data + hdr_len,
1974                                      skb->len - hdr_len);
1975         spin_unlock(&local->baplock);
1976
1977         if (!res)
1978                 res = prism2_transmit(dev, idx);
1979         if (res) {
1980                 printk(KERN_DEBUG "%s: prism2_tx_80211 - to BAP0 failed\n",
1981                        dev->name);
1982                 local->intransmitfid[idx] = PRISM2_TXFID_EMPTY;
1983                 schedule_work(&local->reset_queue);
1984                 goto fail;
1985         }
1986
1987         ret = 0;
1988
1989 fail:
1990         prism2_callback(local, PRISM2_CALLBACK_TX_END);
1991         return ret;
1992 }
1993
1994
1995 /* Some SMP systems have reported number of odd errors with hostap_pci. fid
1996  * register has changed values between consecutive reads for an unknown reason.
1997  * This should really not happen, so more debugging is needed. This test
1998  * version is a big slower, but it will detect most of such register changes
1999  * and will try to get the correct fid eventually. */
2000 #define EXTRA_FID_READ_TESTS
2001
2002 static inline u16 prism2_read_fid_reg(struct net_device *dev, u16 reg)
2003 {
2004 #ifdef EXTRA_FID_READ_TESTS
2005         u16 val, val2, val3;
2006         int i;
2007
2008         for (i = 0; i < 10; i++) {
2009                 val = HFA384X_INW(reg);
2010                 val2 = HFA384X_INW(reg);
2011                 val3 = HFA384X_INW(reg);
2012
2013                 if (val == val2 && val == val3)
2014                         return val;
2015
2016                 printk(KERN_DEBUG "%s: detected fid change (try=%d, reg=%04x):"
2017                        " %04x %04x %04x\n",
2018                        dev->name, i, reg, val, val2, val3);
2019                 if ((val == val2 || val == val3) && val != 0)
2020                         return val;
2021                 if (val2 == val3 && val2 != 0)
2022                         return val2;
2023         }
2024         printk(KERN_WARNING "%s: Uhhuh.. could not read good fid from reg "
2025                "%04x (%04x %04x %04x)\n", dev->name, reg, val, val2, val3);
2026         return val;
2027 #else /* EXTRA_FID_READ_TESTS */
2028         return HFA384X_INW(reg);
2029 #endif /* EXTRA_FID_READ_TESTS */
2030 }
2031
2032
2033 /* Called only as a tasklet (software IRQ) */
2034 static void prism2_rx(local_info_t *local)
2035 {
2036         struct net_device *dev = local->dev;
2037         int res, rx_pending = 0;
2038         u16 len, hdr_len, rxfid, status, macport;
2039         struct net_device_stats *stats;
2040         struct hfa384x_rx_frame rxdesc;
2041         struct sk_buff *skb = NULL;
2042
2043         prism2_callback(local, PRISM2_CALLBACK_RX_START);
2044         stats = hostap_get_stats(dev);
2045
2046         rxfid = prism2_read_fid_reg(dev, HFA384X_RXFID_OFF);
2047 #ifndef final_version
2048         if (rxfid == 0) {
2049                 rxfid = HFA384X_INW(HFA384X_RXFID_OFF);
2050                 printk(KERN_DEBUG "prism2_rx: rxfid=0 (next 0x%04x)\n",
2051                        rxfid);
2052                 if (rxfid == 0) {
2053                         schedule_work(&local->reset_queue);
2054                         goto rx_dropped;
2055                 }
2056                 /* try to continue with the new rxfid value */
2057         }
2058 #endif
2059
2060         spin_lock(&local->baplock);
2061         res = hfa384x_setup_bap(dev, BAP0, rxfid, 0);
2062         if (!res)
2063                 res = hfa384x_from_bap(dev, BAP0, &rxdesc, sizeof(rxdesc));
2064
2065         if (res) {
2066                 spin_unlock(&local->baplock);
2067                 printk(KERN_DEBUG "%s: copy from BAP0 failed %d\n", dev->name,
2068                        res);
2069                 if (res == -ETIMEDOUT) {
2070                         schedule_work(&local->reset_queue);
2071                 }
2072                 goto rx_dropped;
2073         }
2074
2075         len = le16_to_cpu(rxdesc.data_len);
2076         hdr_len = sizeof(rxdesc);
2077         status = le16_to_cpu(rxdesc.status);
2078         macport = (status >> 8) & 0x07;
2079
2080         /* Drop frames with too large reported payload length. Monitor mode
2081          * seems to sometimes pass frames (e.g., ctrl::ack) with signed and
2082          * negative value, so allow also values 65522 .. 65534 (-14 .. -2) for
2083          * macport 7 */
2084         if (len > PRISM2_DATA_MAXLEN + 8 /* WEP */) {
2085                 if (macport == 7 && local->iw_mode == IW_MODE_MONITOR) {
2086                         if (len >= (u16) -14) {
2087                                 hdr_len -= 65535 - len;
2088                                 hdr_len--;
2089                         }
2090                         len = 0;
2091                 } else {
2092                         spin_unlock(&local->baplock);
2093                         printk(KERN_DEBUG "%s: Received frame with invalid "
2094                                "length 0x%04x\n", dev->name, len);
2095                         hostap_dump_rx_header(dev->name, &rxdesc);
2096                         goto rx_dropped;
2097                 }
2098         }
2099
2100         skb = dev_alloc_skb(len + hdr_len);
2101         if (!skb) {
2102                 spin_unlock(&local->baplock);
2103                 printk(KERN_DEBUG "%s: RX failed to allocate skb\n",
2104                        dev->name);
2105                 goto rx_dropped;
2106         }
2107         skb->dev = dev;
2108         memcpy(skb_put(skb, hdr_len), &rxdesc, hdr_len);
2109
2110 #if defined(PRISM2_PCI) && defined(PRISM2_BUS_MASTER)
2111         if (len >= local->bus_master_threshold_rx) {
2112                 unsigned long addr;
2113
2114                 hfa384x_events_no_bap1(dev);
2115
2116                 local->rx_skb = skb;
2117                 /* Internal BAP0 offset points to the byte following rxdesc;
2118                  * copy rest of the data using bus master */
2119                 addr = virt_to_phys(skb_put(skb, len));
2120                 HFA384X_OUTW((addr & 0xffff0000) >> 16,
2121                              HFA384X_PCI_M0_ADDRH_OFF);
2122                 HFA384X_OUTW(addr & 0x0000ffff, HFA384X_PCI_M0_ADDRL_OFF);
2123                 if (len & 1)
2124                         len++;
2125                 HFA384X_OUTW(len / 2, HFA384X_PCI_M0_LEN_OFF);
2126                 HFA384X_OUTW(HFA384X_PCI_CTL_FROM_BAP, HFA384X_PCI_M0_CTL_OFF);
2127
2128                 /* pci_bus_m1 event will be generated when data transfer is
2129                  * complete and the frame will then be added to rx_list and
2130                  * rx_tasklet is scheduled */
2131                 rx_pending = 1;
2132
2133                 /* Have to release baplock before returning, although BAP0
2134                  * should really not be used before DMA transfer has been
2135                  * completed. */
2136                 spin_unlock(&local->baplock);
2137         } else
2138 #endif /* PRISM2_PCI and PRISM2_BUS_MASTER */
2139         {
2140                 if (len > 0)
2141                         res = hfa384x_from_bap(dev, BAP0, skb_put(skb, len),
2142                                                len);
2143                 spin_unlock(&local->baplock);
2144                 if (res) {
2145                         printk(KERN_DEBUG "%s: RX failed to read "
2146                                "frame data\n", dev->name);
2147                         goto rx_dropped;
2148                 }
2149
2150                 skb_queue_tail(&local->rx_list, skb);
2151                 tasklet_schedule(&local->rx_tasklet);
2152         }
2153
2154  rx_exit:
2155         prism2_callback(local, PRISM2_CALLBACK_RX_END);
2156         if (!rx_pending) {
2157                 HFA384X_OUTW(HFA384X_EV_RX, HFA384X_EVACK_OFF);
2158         }
2159
2160         return;
2161
2162  rx_dropped:
2163         stats->rx_dropped++;
2164         if (skb)
2165                 dev_kfree_skb(skb);
2166         goto rx_exit;
2167 }
2168
2169
2170 /* Called only as a tasklet (software IRQ) */
2171 static void hostap_rx_skb(local_info_t *local, struct sk_buff *skb)
2172 {
2173         struct hfa384x_rx_frame *rxdesc;
2174         struct net_device *dev = skb->dev;
2175         struct hostap_80211_rx_status stats;
2176         int hdrlen, rx_hdrlen;
2177
2178         rx_hdrlen = sizeof(*rxdesc);
2179         if (skb->len < sizeof(*rxdesc)) {
2180                 /* Allow monitor mode to receive shorter frames */
2181                 if (local->iw_mode == IW_MODE_MONITOR &&
2182                     skb->len >= sizeof(*rxdesc) - 30) {
2183                         rx_hdrlen = skb->len;
2184                 } else {
2185                         dev_kfree_skb(skb);
2186                         return;
2187                 }
2188         }
2189
2190         rxdesc = (struct hfa384x_rx_frame *) skb->data;
2191
2192         if (local->frame_dump & PRISM2_DUMP_RX_HDR &&
2193             skb->len >= sizeof(*rxdesc))
2194                 hostap_dump_rx_header(dev->name, rxdesc);
2195
2196         if (le16_to_cpu(rxdesc->status) & HFA384X_RX_STATUS_FCSERR &&
2197             (!local->monitor_allow_fcserr ||
2198              local->iw_mode != IW_MODE_MONITOR))
2199                 goto drop;
2200
2201         if (skb->len > PRISM2_DATA_MAXLEN) {
2202                 printk(KERN_DEBUG "%s: RX: len(%d) > MAX(%d)\n",
2203                        dev->name, skb->len, PRISM2_DATA_MAXLEN);
2204                 goto drop;
2205         }
2206
2207         stats.mac_time = le32_to_cpu(rxdesc->time);
2208         stats.signal = rxdesc->signal - local->rssi_to_dBm;
2209         stats.noise = rxdesc->silence - local->rssi_to_dBm;
2210         stats.rate = rxdesc->rate;
2211
2212         /* Convert Prism2 RX structure into IEEE 802.11 header */
2213         hdrlen = hostap_80211_get_hdrlen(le16_to_cpu(rxdesc->frame_control));
2214         if (hdrlen > rx_hdrlen)
2215                 hdrlen = rx_hdrlen;
2216
2217         memmove(skb_pull(skb, rx_hdrlen - hdrlen),
2218                 &rxdesc->frame_control, hdrlen);
2219
2220         hostap_80211_rx(dev, skb, &stats);
2221         return;
2222
2223  drop:
2224         dev_kfree_skb(skb);
2225 }
2226
2227
2228 /* Called only as a tasklet (software IRQ) */
2229 static void hostap_rx_tasklet(unsigned long data)
2230 {
2231         local_info_t *local = (local_info_t *) data;
2232         struct sk_buff *skb;
2233
2234         while ((skb = skb_dequeue(&local->rx_list)) != NULL)
2235                 hostap_rx_skb(local, skb);
2236 }
2237
2238
2239 /* Called only from hardware IRQ */
2240 static void prism2_alloc_ev(struct net_device *dev)
2241 {
2242         struct hostap_interface *iface;
2243         local_info_t *local;
2244         int idx;
2245         u16 fid;
2246
2247         iface = netdev_priv(dev);
2248         local = iface->local;
2249
2250         fid = prism2_read_fid_reg(dev, HFA384X_ALLOCFID_OFF);
2251
2252         PDEBUG(DEBUG_FID, "FID: interrupt: ALLOC - fid=0x%04x\n", fid);
2253
2254         spin_lock(&local->txfidlock);
2255         idx = local->next_alloc;
2256
2257         do {
2258                 if (local->txfid[idx] == fid) {
2259                         PDEBUG(DEBUG_FID, "FID: found matching txfid[%d]\n",
2260                                idx);
2261
2262 #ifndef final_version
2263                         if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY)
2264                                 printk("Already released txfid found at idx "
2265                                        "%d\n", idx);
2266                         if (local->intransmitfid[idx] == PRISM2_TXFID_RESERVED)
2267                                 printk("Already reserved txfid found at idx "
2268                                        "%d\n", idx);
2269 #endif
2270                         local->intransmitfid[idx] = PRISM2_TXFID_EMPTY;
2271                         idx++;
2272                         local->next_alloc = idx >= PRISM2_TXFID_COUNT ? 0 :
2273                                 idx;
2274
2275                         if (!test_bit(HOSTAP_BITS_TRANSMIT, &local->bits) &&
2276                             netif_queue_stopped(dev))
2277                                 netif_wake_queue(dev);
2278
2279                         spin_unlock(&local->txfidlock);
2280                         return;
2281                 }
2282
2283                 idx++;
2284                 if (idx >= PRISM2_TXFID_COUNT)
2285                         idx = 0;
2286         } while (idx != local->next_alloc);
2287
2288         printk(KERN_WARNING "%s: could not find matching txfid (0x%04x, new "
2289                "read 0x%04x) for alloc event\n", dev->name, fid,
2290                HFA384X_INW(HFA384X_ALLOCFID_OFF));
2291         printk(KERN_DEBUG "TXFIDs:");
2292         for (idx = 0; idx < PRISM2_TXFID_COUNT; idx++)
2293                 printk(" %04x[%04x]", local->txfid[idx],
2294                        local->intransmitfid[idx]);
2295         printk("\n");
2296         spin_unlock(&local->txfidlock);
2297
2298         /* FIX: should probably schedule reset; reference to one txfid was lost
2299          * completely.. Bad things will happen if we run out of txfids
2300          * Actually, this will cause netdev watchdog to notice TX timeout and
2301          * then card reset after all txfids have been leaked. */
2302 }
2303
2304
2305 /* Called only as a tasklet (software IRQ) */
2306 static void hostap_tx_callback(local_info_t *local,
2307                                struct hfa384x_tx_frame *txdesc, int ok,
2308                                char *payload)
2309 {
2310         u16 sw_support, hdrlen, len;
2311         struct sk_buff *skb;
2312         struct hostap_tx_callback_info *cb;
2313
2314         /* Make sure that frame was from us. */
2315         if (memcmp(txdesc->addr2, local->dev->dev_addr, ETH_ALEN)) {
2316                 printk(KERN_DEBUG "%s: TX callback - foreign frame\n",
2317                        local->dev->name);
2318                 return;
2319         }
2320
2321         sw_support = le16_to_cpu(txdesc->sw_support);
2322
2323         spin_lock(&local->lock);
2324         cb = local->tx_callback;
2325         while (cb != NULL && cb->idx != sw_support)
2326                 cb = cb->next;
2327         spin_unlock(&local->lock);
2328
2329         if (cb == NULL) {
2330                 printk(KERN_DEBUG "%s: could not find TX callback (idx %d)\n",
2331                        local->dev->name, sw_support);
2332                 return;
2333         }
2334
2335         hdrlen = hostap_80211_get_hdrlen(le16_to_cpu(txdesc->frame_control));
2336         len = le16_to_cpu(txdesc->data_len);
2337         skb = dev_alloc_skb(hdrlen + len);
2338         if (skb == NULL) {
2339                 printk(KERN_DEBUG "%s: hostap_tx_callback failed to allocate "
2340                        "skb\n", local->dev->name);
2341                 return;
2342         }
2343
2344         memcpy(skb_put(skb, hdrlen), (void *) &txdesc->frame_control, hdrlen);
2345         if (payload)
2346                 memcpy(skb_put(skb, len), payload, len);
2347
2348         skb->dev = local->dev;
2349         skb->mac.raw = skb->data;
2350
2351         cb->func(skb, ok, cb->data);
2352 }
2353
2354
2355 /* Called only as a tasklet (software IRQ) */
2356 static int hostap_tx_compl_read(local_info_t *local, int error,
2357                                 struct hfa384x_tx_frame *txdesc,
2358                                 char **payload)
2359 {
2360         u16 fid, len;
2361         int res, ret = 0;
2362         struct net_device *dev = local->dev;
2363
2364         fid = prism2_read_fid_reg(dev, HFA384X_TXCOMPLFID_OFF);
2365
2366         PDEBUG(DEBUG_FID, "interrupt: TX (err=%d) - fid=0x%04x\n", fid, error);
2367
2368         spin_lock(&local->baplock);
2369         res = hfa384x_setup_bap(dev, BAP0, fid, 0);
2370         if (!res)
2371                 res = hfa384x_from_bap(dev, BAP0, txdesc, sizeof(*txdesc));
2372         if (res) {
2373                 PDEBUG(DEBUG_EXTRA, "%s: TX (err=%d) - fid=0x%04x - could not "
2374                        "read txdesc\n", dev->name, error, fid);
2375                 if (res == -ETIMEDOUT) {
2376                         schedule_work(&local->reset_queue);
2377                 }
2378                 ret = -1;
2379                 goto fail;
2380         }
2381         if (txdesc->sw_support) {
2382                 len = le16_to_cpu(txdesc->data_len);
2383                 if (len < PRISM2_DATA_MAXLEN) {
2384                         *payload = (char *) kmalloc(len, GFP_ATOMIC);
2385                         if (*payload == NULL ||
2386                             hfa384x_from_bap(dev, BAP0, *payload, len)) {
2387                                 PDEBUG(DEBUG_EXTRA, "%s: could not read TX "
2388                                        "frame payload\n", dev->name);
2389                                 kfree(*payload);
2390                                 *payload = NULL;
2391                                 ret = -1;
2392                                 goto fail;
2393                         }
2394                 }
2395         }
2396
2397  fail:
2398         spin_unlock(&local->baplock);
2399
2400         return ret;
2401 }
2402
2403
2404 /* Called only as a tasklet (software IRQ) */
2405 static void prism2_tx_ev(local_info_t *local)
2406 {
2407         struct net_device *dev = local->dev;
2408         char *payload = NULL;
2409         struct hfa384x_tx_frame txdesc;
2410
2411         if (hostap_tx_compl_read(local, 0, &txdesc, &payload))
2412                 goto fail;
2413
2414         if (local->frame_dump & PRISM2_DUMP_TX_HDR) {
2415                 PDEBUG(DEBUG_EXTRA, "%s: TX - status=0x%04x "
2416                        "retry_count=%d tx_rate=%d seq_ctrl=%d "
2417                        "duration_id=%d\n",
2418                        dev->name, le16_to_cpu(txdesc.status),
2419                        txdesc.retry_count, txdesc.tx_rate,
2420                        le16_to_cpu(txdesc.seq_ctrl),
2421                        le16_to_cpu(txdesc.duration_id));
2422         }
2423
2424         if (txdesc.sw_support)
2425                 hostap_tx_callback(local, &txdesc, 1, payload);
2426         kfree(payload);
2427
2428  fail:
2429         HFA384X_OUTW(HFA384X_EV_TX, HFA384X_EVACK_OFF);
2430 }
2431
2432
2433 /* Called only as a tasklet (software IRQ) */
2434 static void hostap_sta_tx_exc_tasklet(unsigned long data)
2435 {
2436         local_info_t *local = (local_info_t *) data;
2437         struct sk_buff *skb;
2438
2439         while ((skb = skb_dequeue(&local->sta_tx_exc_list)) != NULL) {
2440                 struct hfa384x_tx_frame *txdesc =
2441                         (struct hfa384x_tx_frame *) skb->data;
2442
2443                 if (skb->len >= sizeof(*txdesc)) {
2444                         /* Convert Prism2 RX structure into IEEE 802.11 header
2445                          */
2446                         u16 fc = le16_to_cpu(txdesc->frame_control);
2447                         int hdrlen = hostap_80211_get_hdrlen(fc);
2448                         memmove(skb_pull(skb, sizeof(*txdesc) - hdrlen),
2449                                 &txdesc->frame_control, hdrlen);
2450
2451                         hostap_handle_sta_tx_exc(local, skb);
2452                 }
2453                 dev_kfree_skb(skb);
2454         }
2455 }
2456
2457
2458 /* Called only as a tasklet (software IRQ) */
2459 static void prism2_txexc(local_info_t *local)
2460 {
2461         struct net_device *dev = local->dev;
2462         u16 status, fc;
2463         int show_dump, res;
2464         char *payload = NULL;
2465         struct hfa384x_tx_frame txdesc;
2466
2467         show_dump = local->frame_dump & PRISM2_DUMP_TXEXC_HDR;
2468         local->stats.tx_errors++;
2469
2470         res = hostap_tx_compl_read(local, 1, &txdesc, &payload);
2471         HFA384X_OUTW(HFA384X_EV_TXEXC, HFA384X_EVACK_OFF);
2472         if (res)
2473                 return;
2474
2475         status = le16_to_cpu(txdesc.status);
2476
2477         /* We produce a TXDROP event only for retry or lifetime
2478          * exceeded, because that's the only status that really mean
2479          * that this particular node went away.
2480          * Other errors means that *we* screwed up. - Jean II */
2481         if (status & (HFA384X_TX_STATUS_RETRYERR | HFA384X_TX_STATUS_AGEDERR))
2482         {
2483                 union iwreq_data wrqu;
2484
2485                 /* Copy 802.11 dest address. */
2486                 memcpy(wrqu.addr.sa_data, txdesc.addr1, ETH_ALEN);
2487                 wrqu.addr.sa_family = ARPHRD_ETHER;
2488                 wireless_send_event(dev, IWEVTXDROP, &wrqu, NULL);
2489         } else
2490                 show_dump = 1;
2491
2492         if (local->iw_mode == IW_MODE_MASTER ||
2493             local->iw_mode == IW_MODE_REPEAT ||
2494             local->wds_type & HOSTAP_WDS_AP_CLIENT) {
2495                 struct sk_buff *skb;
2496                 skb = dev_alloc_skb(sizeof(txdesc));
2497                 if (skb) {
2498                         memcpy(skb_put(skb, sizeof(txdesc)), &txdesc,
2499                                sizeof(txdesc));
2500                         skb_queue_tail(&local->sta_tx_exc_list, skb);
2501                         tasklet_schedule(&local->sta_tx_exc_tasklet);
2502                 }
2503         }
2504
2505         if (txdesc.sw_support)
2506                 hostap_tx_callback(local, &txdesc, 0, payload);
2507         kfree(payload);
2508
2509         if (!show_dump)
2510                 return;
2511
2512         PDEBUG(DEBUG_EXTRA, "%s: TXEXC - status=0x%04x (%s%s%s%s)"
2513                " tx_control=%04x\n",
2514                dev->name, status,
2515                status & HFA384X_TX_STATUS_RETRYERR ? "[RetryErr]" : "",
2516                status & HFA384X_TX_STATUS_AGEDERR ? "[AgedErr]" : "",
2517                status & HFA384X_TX_STATUS_DISCON ? "[Discon]" : "",
2518                status & HFA384X_TX_STATUS_FORMERR ? "[FormErr]" : "",
2519                le16_to_cpu(txdesc.tx_control));
2520
2521         fc = le16_to_cpu(txdesc.frame_control);
2522         PDEBUG(DEBUG_EXTRA, "   retry_count=%d tx_rate=%d fc=0x%04x "
2523                "(%s%s%s::%d%s%s)\n",
2524                txdesc.retry_count, txdesc.tx_rate, fc,
2525                HOSTAP_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT ? "Mgmt" : "",
2526                HOSTAP_FC_GET_TYPE(fc) == WLAN_FC_TYPE_CTRL ? "Ctrl" : "",
2527                HOSTAP_FC_GET_TYPE(fc) == WLAN_FC_TYPE_DATA ? "Data" : "",
2528                HOSTAP_FC_GET_STYPE(fc),
2529                fc & WLAN_FC_TODS ? " ToDS" : "",
2530                fc & WLAN_FC_FROMDS ? " FromDS" : "");
2531         PDEBUG(DEBUG_EXTRA, "   A1=" MACSTR " A2=" MACSTR " A3="
2532                MACSTR " A4=" MACSTR "\n",
2533                MAC2STR(txdesc.addr1), MAC2STR(txdesc.addr2),
2534                MAC2STR(txdesc.addr3), MAC2STR(txdesc.addr4));
2535 }
2536
2537
2538 /* Called only as a tasklet (software IRQ) */
2539 static void hostap_info_tasklet(unsigned long data)
2540 {
2541         local_info_t *local = (local_info_t *) data;
2542         struct sk_buff *skb;
2543
2544         while ((skb = skb_dequeue(&local->info_list)) != NULL) {
2545                 hostap_info_process(local, skb);
2546                 dev_kfree_skb(skb);
2547         }
2548 }
2549
2550
2551 /* Called only as a tasklet (software IRQ) */
2552 static void prism2_info(local_info_t *local)
2553 {
2554         struct net_device *dev = local->dev;
2555         u16 fid;
2556         int res, left;
2557         struct hfa384x_info_frame info;
2558         struct sk_buff *skb;
2559
2560         fid = HFA384X_INW(HFA384X_INFOFID_OFF);
2561
2562         spin_lock(&local->baplock);
2563         res = hfa384x_setup_bap(dev, BAP0, fid, 0);
2564         if (!res)
2565                 res = hfa384x_from_bap(dev, BAP0, &info, sizeof(info));
2566         if (res) {
2567                 spin_unlock(&local->baplock);
2568                 printk(KERN_DEBUG "Could not get info frame (fid=0x%04x)\n",
2569                        fid);
2570                 if (res == -ETIMEDOUT) {
2571                         schedule_work(&local->reset_queue);
2572                 }
2573                 goto out;
2574         }
2575
2576         le16_to_cpus(&info.len);
2577         le16_to_cpus(&info.type);
2578         left = (info.len - 1) * 2;
2579
2580         if (info.len & 0x8000 || info.len == 0 || left > 2060) {
2581                 /* data register seems to give 0x8000 in some error cases even
2582                  * though busy bit is not set in offset register;
2583                  * in addition, length must be at least 1 due to type field */
2584                 spin_unlock(&local->baplock);
2585                 printk(KERN_DEBUG "%s: Received info frame with invalid "
2586                        "length 0x%04x (type 0x%04x)\n", dev->name, info.len,
2587                        info.type);
2588                 goto out;
2589         }
2590
2591         skb = dev_alloc_skb(sizeof(info) + left);
2592         if (skb == NULL) {
2593                 spin_unlock(&local->baplock);
2594                 printk(KERN_DEBUG "%s: Could not allocate skb for info "
2595                        "frame\n", dev->name);
2596                 goto out;
2597         }
2598
2599         memcpy(skb_put(skb, sizeof(info)), &info, sizeof(info));
2600         if (left > 0 && hfa384x_from_bap(dev, BAP0, skb_put(skb, left), left))
2601         {
2602                 spin_unlock(&local->baplock);
2603                 printk(KERN_WARNING "%s: Info frame read failed (fid=0x%04x, "
2604                        "len=0x%04x, type=0x%04x\n",
2605                        dev->name, fid, info.len, info.type);
2606                 dev_kfree_skb(skb);
2607                 goto out;
2608         }
2609         spin_unlock(&local->baplock);
2610
2611         skb_queue_tail(&local->info_list, skb);
2612         tasklet_schedule(&local->info_tasklet);
2613
2614  out:
2615         HFA384X_OUTW(HFA384X_EV_INFO, HFA384X_EVACK_OFF);
2616 }
2617
2618
2619 /* Called only as a tasklet (software IRQ) */
2620 static void hostap_bap_tasklet(unsigned long data)
2621 {
2622         local_info_t *local = (local_info_t *) data;
2623         struct net_device *dev = local->dev;
2624         u16 ev;
2625         int frames = 30;
2626
2627         if (local->func->card_present && !local->func->card_present(local))
2628                 return;
2629
2630         set_bit(HOSTAP_BITS_BAP_TASKLET, &local->bits);
2631
2632         /* Process all pending BAP events without generating new interrupts
2633          * for them */
2634         while (frames-- > 0) {
2635                 ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2636                 if (ev == 0xffff || !(ev & HFA384X_BAP0_EVENTS))
2637                         break;
2638                 if (ev & HFA384X_EV_RX)
2639                         prism2_rx(local);
2640                 if (ev & HFA384X_EV_INFO)
2641                         prism2_info(local);
2642                 if (ev & HFA384X_EV_TX)
2643                         prism2_tx_ev(local);
2644                 if (ev & HFA384X_EV_TXEXC)
2645                         prism2_txexc(local);
2646         }
2647
2648         set_bit(HOSTAP_BITS_BAP_TASKLET2, &local->bits);
2649         clear_bit(HOSTAP_BITS_BAP_TASKLET, &local->bits);
2650
2651         /* Enable interrupts for new BAP events */
2652         hfa384x_events_all(dev);
2653         clear_bit(HOSTAP_BITS_BAP_TASKLET2, &local->bits);
2654 }
2655
2656
2657 #if defined(PRISM2_PCI) && defined(PRISM2_BUS_MASTER)
2658 /* Called only from hardware IRQ */
2659 static void prism2_bus_master_ev(struct net_device *dev, int bap)
2660 {
2661         struct hostap_interface *iface;
2662         local_info_t *local;
2663
2664         iface = netdev_priv(dev);
2665         local = iface->local;
2666
2667         if (bap == BAP1) {
2668                 /* FIX: frame payload was DMA'd to skb->data; might need to
2669                  * invalidate data cache for that memory area */
2670                 skb_queue_tail(&local->rx_list, local->rx_skb);
2671                 tasklet_schedule(&local->rx_tasklet);
2672                 HFA384X_OUTW(HFA384X_EV_RX, HFA384X_EVACK_OFF);
2673         } else {
2674                 if (prism2_transmit(dev, local->bus_m0_tx_idx)) {
2675                         printk(KERN_DEBUG "%s: prism2_transmit() failed "
2676                                "when called from bus master event\n",
2677                                dev->name);
2678                         local->intransmitfid[local->bus_m0_tx_idx] =
2679                                 PRISM2_TXFID_EMPTY;
2680                         schedule_work(&local->reset_queue);
2681                 }
2682         }
2683 }
2684 #endif /* PRISM2_PCI and PRISM2_BUS_MASTER */
2685
2686
2687 /* Called only from hardware IRQ */
2688 static void prism2_infdrop(struct net_device *dev)
2689 {
2690         static unsigned long last_inquire = 0;
2691
2692         PDEBUG(DEBUG_EXTRA, "%s: INFDROP event\n", dev->name);
2693
2694         /* some firmware versions seem to get stuck with
2695          * full CommTallies in high traffic load cases; every
2696          * packet will then cause INFDROP event and CommTallies
2697          * info frame will not be sent automatically. Try to
2698          * get out of this state by inquiring CommTallies. */
2699         if (!last_inquire || time_after(jiffies, last_inquire + HZ)) {
2700                 hfa384x_cmd_callback(dev, HFA384X_CMDCODE_INQUIRE,
2701                                      HFA384X_INFO_COMMTALLIES, NULL, 0);
2702                 last_inquire = jiffies;
2703         }
2704 }
2705
2706
2707 /* Called only from hardware IRQ */
2708 static void prism2_ev_tick(struct net_device *dev)
2709 {
2710         struct hostap_interface *iface;
2711         local_info_t *local;
2712         u16 evstat, inten;
2713         static int prev_stuck = 0;
2714
2715         iface = netdev_priv(dev);
2716         local = iface->local;
2717
2718         if (time_after(jiffies, local->last_tick_timer + 5 * HZ) &&
2719             local->last_tick_timer) {
2720                 evstat = HFA384X_INW(HFA384X_EVSTAT_OFF);
2721                 inten = HFA384X_INW(HFA384X_INTEN_OFF);
2722                 if (!prev_stuck) {
2723                         printk(KERN_INFO "%s: SW TICK stuck? "
2724                                "bits=0x%lx EvStat=%04x IntEn=%04x\n",
2725                                dev->name, local->bits, evstat, inten);
2726                 }
2727                 local->sw_tick_stuck++;
2728                 if ((evstat & HFA384X_BAP0_EVENTS) &&
2729                     (inten & HFA384X_BAP0_EVENTS)) {
2730                         printk(KERN_INFO "%s: trying to recover from IRQ "
2731                                "hang\n", dev->name);
2732                         hfa384x_events_no_bap0(dev);
2733                 }
2734                 prev_stuck = 1;
2735         } else
2736                 prev_stuck = 0;
2737 }
2738
2739
2740 /* Called only from hardware IRQ */
2741 static inline void prism2_check_magic(local_info_t *local)
2742 {
2743         /* at least PCI Prism2.5 with bus mastering seems to sometimes
2744          * return 0x0000 in SWSUPPORT0 for unknown reason, but re-reading the
2745          * register once or twice seems to get the correct value.. PCI cards
2746          * cannot anyway be removed during normal operation, so there is not
2747          * really any need for this verification with them. */
2748
2749 #ifndef PRISM2_PCI
2750 #ifndef final_version
2751         static unsigned long last_magic_err = 0;
2752         struct net_device *dev = local->dev;
2753
2754         if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != HFA384X_MAGIC) {
2755                 if (!local->hw_ready)
2756                         return;
2757                 HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
2758                 if (time_after(jiffies, last_magic_err + 10 * HZ)) {
2759                         printk("%s: Interrupt, but SWSUPPORT0 does not match: "
2760                                "%04X != %04X - card removed?\n", dev->name,
2761                                HFA384X_INW(HFA384X_SWSUPPORT0_OFF),
2762                                HFA384X_MAGIC);
2763                         last_magic_err = jiffies;
2764                 } else if (net_ratelimit()) {
2765                         printk(KERN_DEBUG "%s: interrupt - SWSUPPORT0=%04x "
2766                                "MAGIC=%04x\n", dev->name,
2767                                HFA384X_INW(HFA384X_SWSUPPORT0_OFF),
2768                                HFA384X_MAGIC);
2769                 }
2770                 if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != 0xffff)
2771                         schedule_work(&local->reset_queue);
2772                 return;
2773         }
2774 #endif /* final_version */
2775 #endif /* !PRISM2_PCI */
2776 }
2777
2778
2779 /* Called only from hardware IRQ */
2780 static irqreturn_t prism2_interrupt(int irq, void *dev_id, struct pt_regs *regs)
2781 {
2782         struct net_device *dev = (struct net_device *) dev_id;
2783         struct hostap_interface *iface;
2784         local_info_t *local;
2785         int events = 0;
2786         u16 ev;
2787
2788         iface = netdev_priv(dev);
2789         local = iface->local;
2790
2791         prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INTERRUPT, 0, 0);
2792
2793         if (local->func->card_present && !local->func->card_present(local)) {
2794                 if (net_ratelimit()) {
2795                         printk(KERN_DEBUG "%s: Interrupt, but dev not OK\n",
2796                                dev->name);
2797                 }
2798                 return IRQ_HANDLED;
2799         }
2800
2801         prism2_check_magic(local);
2802
2803         for (;;) {
2804                 ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2805                 if (ev == 0xffff) {
2806                         if (local->shutdown)
2807                                 return IRQ_HANDLED;
2808                         HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF);
2809                         printk(KERN_DEBUG "%s: prism2_interrupt: ev=0xffff\n",
2810                                dev->name);
2811                         return IRQ_HANDLED;
2812                 }
2813
2814                 ev &= HFA384X_INW(HFA384X_INTEN_OFF);
2815                 if (ev == 0)
2816                         break;
2817
2818                 if (ev & HFA384X_EV_CMD) {
2819                         prism2_cmd_ev(dev);
2820                 }
2821
2822                 /* Above events are needed even before hw is ready, but other
2823                  * events should be skipped during initialization. This may
2824                  * change for AllocEv if allocate_fid is implemented without
2825                  * busy waiting. */
2826                 if (!local->hw_ready || local->hw_resetting ||
2827                     !local->dev_enabled) {
2828                         ev = HFA384X_INW(HFA384X_EVSTAT_OFF);
2829                         if (ev & HFA384X_EV_CMD)
2830                                 goto next_event;
2831                         if ((ev & HFA384X_EVENT_MASK) == 0)
2832                                 return IRQ_HANDLED;
2833                         if (local->dev_enabled && (ev & ~HFA384X_EV_TICK) &&
2834                             net_ratelimit()) {
2835                                 printk(KERN_DEBUG "%s: prism2_interrupt: hw "
2836                                        "not ready; skipping events 0x%04x "
2837                                        "(IntEn=0x%04x)%s%s%s\n",
2838                                        dev->name, ev,
2839                                        HFA384X_INW(HFA384X_INTEN_OFF),
2840                                        !local->hw_ready ? " (!hw_ready)" : "",
2841                                        local->hw_resetting ?
2842                                        " (hw_resetting)" : "",
2843                                        !local->dev_enabled ?
2844                                        " (!dev_enabled)" : "");
2845                         }
2846                         HFA384X_OUTW(ev, HFA384X_EVACK_OFF);
2847                         return IRQ_HANDLED;
2848                 }
2849
2850                 if (ev & HFA384X_EV_TICK) {
2851                         prism2_ev_tick(dev);
2852                         HFA384X_OUTW(HFA384X_EV_TICK, HFA384X_EVACK_OFF);
2853                 }
2854
2855 #if defined(PRISM2_PCI) && defined(PRISM2_BUS_MASTER)
2856                 if (ev & HFA384X_EV_PCI_M0) {
2857                         prism2_bus_master_ev(dev, BAP0);
2858                         HFA384X_OUTW(HFA384X_EV_PCI_M0, HFA384X_EVACK_OFF);
2859                 }
2860
2861                 if (ev & HFA384X_EV_PCI_M1) {
2862                         /* previous RX has been copied can be ACKed now */
2863                         HFA384X_OUTW(HFA384X_EV_RX, HFA384X_EVACK_OFF);
2864
2865                         prism2_bus_master_ev(dev, BAP1);
2866                         HFA384X_OUTW(HFA384X_EV_PCI_M1, HFA384X_EVACK_OFF);
2867                 }
2868 #endif /* PRISM2_PCI and PRISM2_BUS_MASTER */
2869
2870                 if (ev & HFA384X_EV_ALLOC) {
2871                         prism2_alloc_ev(dev);
2872                         HFA384X_OUTW(HFA384X_EV_ALLOC, HFA384X_EVACK_OFF);
2873                 }
2874
2875                 /* Reading data from the card is quite time consuming, so do it
2876                  * in tasklets. TX, TXEXC, RX, and INFO events will be ACKed
2877                  * and unmasked after needed data has been read completely. */
2878                 if (ev & HFA384X_BAP0_EVENTS) {
2879                         hfa384x_events_no_bap0(dev);
2880                         tasklet_schedule(&local->bap_tasklet);
2881                 }
2882
2883 #ifndef final_version
2884                 if (ev & HFA384X_EV_WTERR) {
2885                         PDEBUG(DEBUG_EXTRA, "%s: WTERR event\n", dev->name);
2886                         HFA384X_OUTW(HFA384X_EV_WTERR, HFA384X_EVACK_OFF);
2887                 }
2888 #endif /* final_version */
2889
2890                 if (ev & HFA384X_EV_INFDROP) {
2891                         prism2_infdrop(dev);
2892                         HFA384X_OUTW(HFA384X_EV_INFDROP, HFA384X_EVACK_OFF);
2893                 }
2894
2895         next_event:
2896                 events++;
2897                 if (events >= PRISM2_MAX_INTERRUPT_EVENTS) {
2898                         PDEBUG(DEBUG_EXTRA, "prism2_interrupt: >%d events "
2899                                "(EvStat=0x%04x)\n",
2900                                PRISM2_MAX_INTERRUPT_EVENTS,
2901                                HFA384X_INW(HFA384X_EVSTAT_OFF));
2902                         break;
2903                 }
2904         }
2905         prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INTERRUPT, 0, 1);
2906         return IRQ_RETVAL(events);
2907 }
2908
2909
2910 static void prism2_check_sta_fw_version(local_info_t *local)
2911 {
2912         struct hfa384x_comp_ident comp;
2913         int id, variant, major, minor;
2914
2915         if (hfa384x_get_rid(local->dev, HFA384X_RID_STAID,
2916                             &comp, sizeof(comp), 1) < 0)
2917                 return;
2918
2919         local->fw_ap = 0;
2920         id = le16_to_cpu(comp.id);
2921         if (id != HFA384X_COMP_ID_STA) {
2922                 if (id == HFA384X_COMP_ID_FW_AP)
2923                         local->fw_ap = 1;
2924                 return;
2925         }
2926
2927         major = __le16_to_cpu(comp.major);
2928         minor = __le16_to_cpu(comp.minor);
2929         variant = __le16_to_cpu(comp.variant);
2930         local->sta_fw_ver = PRISM2_FW_VER(major, minor, variant);
2931
2932         /* Station firmware versions before 1.4.x seem to have a bug in
2933          * firmware-based WEP encryption when using Host AP mode, so use
2934          * host_encrypt as a default for them. Firmware version 1.4.9 is the
2935          * first one that has been seen to produce correct encryption, but the
2936          * bug might be fixed before that (although, at least 1.4.2 is broken).
2937          */
2938         local->fw_encrypt_ok = local->sta_fw_ver >= PRISM2_FW_VER(1,4,9);
2939
2940         if (local->iw_mode == IW_MODE_MASTER && !local->host_encrypt &&
2941             !local->fw_encrypt_ok) {
2942                 printk(KERN_DEBUG "%s: defaulting to host-based encryption as "
2943                        "a workaround for firmware bug in Host AP mode WEP\n",
2944                        local->dev->name);
2945                 local->host_encrypt = 1;
2946         }
2947
2948         /* IEEE 802.11 standard compliant WDS frames (4 addresses) were broken
2949          * in station firmware versions before 1.5.x. With these versions, the
2950          * driver uses a workaround with bogus frame format (4th address after
2951          * the payload). This is not compatible with other AP devices. Since
2952          * the firmware bug is fixed in the latest station firmware versions,
2953          * automatically enable standard compliant mode for cards using station
2954          * firmware version 1.5.0 or newer. */
2955         if (local->sta_fw_ver >= PRISM2_FW_VER(1,5,0))
2956                 local->wds_type |= HOSTAP_WDS_STANDARD_FRAME;
2957         else {
2958                 printk(KERN_DEBUG "%s: defaulting to bogus WDS frame as a "
2959                        "workaround for firmware bug in Host AP mode WDS\n",
2960                        local->dev->name);
2961         }
2962
2963         hostap_check_sta_fw_version(local->ap, local->sta_fw_ver);
2964 }
2965
2966
2967 static void prism2_crypt_deinit_entries(local_info_t *local, int force)
2968 {
2969         struct list_head *ptr, *n;
2970         struct ieee80211_crypt_data *entry;
2971
2972         for (ptr = local->crypt_deinit_list.next, n = ptr->next;
2973              ptr != &local->crypt_deinit_list; ptr = n, n = ptr->next) {
2974                 entry = list_entry(ptr, struct ieee80211_crypt_data, list);
2975
2976                 if (atomic_read(&entry->refcnt) != 0 && !force)
2977                         continue;
2978
2979                 list_del(ptr);
2980
2981                 if (entry->ops)
2982                         entry->ops->deinit(entry->priv);
2983                 kfree(entry);
2984         }
2985 }
2986
2987
2988 static void prism2_crypt_deinit_handler(unsigned long data)
2989 {
2990         local_info_t *local = (local_info_t *) data;
2991         unsigned long flags;
2992
2993         spin_lock_irqsave(&local->lock, flags);
2994         prism2_crypt_deinit_entries(local, 0);
2995         if (!list_empty(&local->crypt_deinit_list)) {
2996                 printk(KERN_DEBUG "%s: entries remaining in delayed crypt "
2997                        "deletion list\n", local->dev->name);
2998                 local->crypt_deinit_timer.expires = jiffies + HZ;
2999                 add_timer(&local->crypt_deinit_timer);
3000         }
3001         spin_unlock_irqrestore(&local->lock, flags);
3002
3003 }
3004
3005
3006 static void hostap_passive_scan(unsigned long data)
3007 {
3008         local_info_t *local = (local_info_t *) data;
3009         struct net_device *dev = local->dev;
3010         u16 channel;
3011
3012         if (local->passive_scan_interval <= 0)
3013                 return;
3014
3015         if (local->passive_scan_state == PASSIVE_SCAN_LISTEN) {
3016                 int max_tries = 16;
3017
3018                 /* Even though host system does not really know when the WLAN
3019                  * MAC is sending frames, try to avoid changing channels for
3020                  * passive scanning when a host-generated frame is being
3021                  * transmitted */
3022                 if (test_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) {
3023                         printk(KERN_DEBUG "%s: passive scan detected pending "
3024                                "TX - delaying\n", dev->name);
3025                         local->passive_scan_timer.expires = jiffies + HZ / 10;
3026                         add_timer(&local->passive_scan_timer);
3027                         return;
3028                 }
3029
3030                 do {
3031                         local->passive_scan_channel++;
3032                         if (local->passive_scan_channel > 14)
3033                                 local->passive_scan_channel = 1;
3034                         max_tries--;
3035                 } while (!(local->channel_mask &
3036                            (1 << (local->passive_scan_channel - 1))) &&
3037                          max_tries > 0);
3038
3039                 if (max_tries == 0) {
3040                         printk(KERN_INFO "%s: no allowed passive scan channels"
3041                                " found\n", dev->name);
3042                         return;
3043                 }
3044
3045                 printk(KERN_DEBUG "%s: passive scan channel %d\n",
3046                        dev->name, local->passive_scan_channel);
3047                 channel = local->passive_scan_channel;
3048                 local->passive_scan_state = PASSIVE_SCAN_WAIT;
3049                 local->passive_scan_timer.expires = jiffies + HZ / 10;
3050         } else {
3051                 channel = local->channel;
3052                 local->passive_scan_state = PASSIVE_SCAN_LISTEN;
3053                 local->passive_scan_timer.expires = jiffies +
3054                         local->passive_scan_interval * HZ;
3055         }
3056
3057         if (hfa384x_cmd_callback(dev, HFA384X_CMDCODE_TEST |
3058                                  (HFA384X_TEST_CHANGE_CHANNEL << 8),
3059                                  channel, NULL, 0))
3060                 printk(KERN_ERR "%s: passive scan channel set %d "
3061                        "failed\n", dev->name, channel);
3062
3063         add_timer(&local->passive_scan_timer);
3064 }
3065
3066
3067 /* Called only as a scheduled task when communications quality values should
3068  * be updated. */
3069 static void handle_comms_qual_update(void *data)
3070 {
3071         local_info_t *local = data;
3072         prism2_update_comms_qual(local->dev);
3073 }
3074
3075
3076 /* Software watchdog - called as a timer. Hardware interrupt (Tick event) is
3077  * used to monitor that local->last_tick_timer is being updated. If not,
3078  * interrupt busy-loop is assumed and driver tries to recover by masking out
3079  * some events. */
3080 static void hostap_tick_timer(unsigned long data)
3081 {
3082         static unsigned long last_inquire = 0;
3083         local_info_t *local = (local_info_t *) data;
3084         local->last_tick_timer = jiffies;
3085
3086         /* Inquire CommTallies every 10 seconds to keep the statistics updated
3087          * more often during low load and when using 32-bit tallies. */
3088         if ((!last_inquire || time_after(jiffies, last_inquire + 10 * HZ)) &&
3089             !local->hw_downloading && local->hw_ready &&
3090             !local->hw_resetting && local->dev_enabled) {
3091                 hfa384x_cmd_callback(local->dev, HFA384X_CMDCODE_INQUIRE,
3092                                      HFA384X_INFO_COMMTALLIES, NULL, 0);
3093                 last_inquire = jiffies;
3094         }
3095
3096         if ((local->last_comms_qual_update == 0 ||
3097              time_after(jiffies, local->last_comms_qual_update + 10 * HZ)) &&
3098             (local->iw_mode == IW_MODE_INFRA ||
3099              local->iw_mode == IW_MODE_ADHOC)) {
3100                 schedule_work(&local->comms_qual_update);
3101         }
3102
3103         local->tick_timer.expires = jiffies + 2 * HZ;
3104         add_timer(&local->tick_timer);
3105 }
3106
3107
3108 #ifndef PRISM2_NO_PROCFS_DEBUG
3109 static int prism2_registers_proc_read(char *page, char **start, off_t off,
3110                                       int count, int *eof, void *data)
3111 {
3112         char *p = page;
3113         local_info_t *local = (local_info_t *) data;
3114
3115         if (off != 0) {
3116                 *eof = 1;
3117                 return 0;
3118         }
3119
3120 #define SHOW_REG(n) \
3121 p += sprintf(p, #n "=%04x\n", hfa384x_read_reg(local->dev, HFA384X_##n##_OFF))
3122
3123         SHOW_REG(CMD);
3124         SHOW_REG(PARAM0);
3125         SHOW_REG(PARAM1);
3126         SHOW_REG(PARAM2);
3127         SHOW_REG(STATUS);
3128         SHOW_REG(RESP0);
3129         SHOW_REG(RESP1);
3130         SHOW_REG(RESP2);
3131         SHOW_REG(INFOFID);
3132         SHOW_REG(CONTROL);
3133         SHOW_REG(SELECT0);
3134         SHOW_REG(SELECT1);
3135         SHOW_REG(OFFSET0);
3136         SHOW_REG(OFFSET1);
3137         SHOW_REG(RXFID);
3138         SHOW_REG(ALLOCFID);
3139         SHOW_REG(TXCOMPLFID);
3140         SHOW_REG(SWSUPPORT0);
3141         SHOW_REG(SWSUPPORT1);
3142         SHOW_REG(SWSUPPORT2);
3143         SHOW_REG(EVSTAT);
3144         SHOW_REG(INTEN);
3145         SHOW_REG(EVACK);
3146         /* Do not read data registers, because they change the state of the
3147          * MAC (offset += 2) */
3148         /* SHOW_REG(DATA0); */
3149         /* SHOW_REG(DATA1); */
3150         SHOW_REG(AUXPAGE);
3151         SHOW_REG(AUXOFFSET);
3152         /* SHOW_REG(AUXDATA); */
3153 #ifdef PRISM2_PCI
3154         SHOW_REG(PCICOR);
3155         SHOW_REG(PCIHCR);
3156         SHOW_REG(PCI_M0_ADDRH);
3157         SHOW_REG(PCI_M0_ADDRL);
3158         SHOW_REG(PCI_M0_LEN);
3159         SHOW_REG(PCI_M0_CTL);
3160         SHOW_REG(PCI_STATUS);
3161         SHOW_REG(PCI_M1_ADDRH);
3162         SHOW_REG(PCI_M1_ADDRL);
3163         SHOW_REG(PCI_M1_LEN);
3164         SHOW_REG(PCI_M1_CTL);
3165 #endif /* PRISM2_PCI */
3166
3167         return (p - page);
3168 }
3169 #endif /* PRISM2_NO_PROCFS_DEBUG */
3170
3171
3172 struct set_tim_data {
3173         struct list_head list;
3174         int aid;
3175         int set;
3176 };
3177
3178 static int prism2_set_tim(struct net_device *dev, int aid, int set)
3179 {
3180         struct list_head *ptr;
3181         struct set_tim_data *new_entry;
3182         struct hostap_interface *iface;
3183         local_info_t *local;
3184
3185         iface = netdev_priv(dev);
3186         local = iface->local;
3187
3188         new_entry = (struct set_tim_data *)
3189                 kmalloc(sizeof(*new_entry), GFP_ATOMIC);
3190         if (new_entry == NULL) {
3191                 printk(KERN_DEBUG "%s: prism2_set_tim: kmalloc failed\n",
3192                        local->dev->name);
3193                 return -ENOMEM;
3194         }
3195         memset(new_entry, 0, sizeof(*new_entry));
3196         new_entry->aid = aid;
3197         new_entry->set = set;
3198
3199         spin_lock_bh(&local->set_tim_lock);
3200         list_for_each(ptr, &local->set_tim_list) {
3201                 struct set_tim_data *entry =
3202                         list_entry(ptr, struct set_tim_data, list);
3203                 if (entry->aid == aid) {
3204                         PDEBUG(DEBUG_PS2, "%s: prism2_set_tim: aid=%d "
3205                                "set=%d ==> %d\n",
3206                                local->dev->name, aid, entry->set, set);
3207                         entry->set = set;
3208                         kfree(new_entry);
3209                         new_entry = NULL;
3210                         break;
3211                 }
3212         }
3213         if (new_entry)
3214                 list_add_tail(&new_entry->list, &local->set_tim_list);
3215         spin_unlock_bh(&local->set_tim_lock);
3216
3217         schedule_work(&local->set_tim_queue);
3218
3219         return 0;
3220 }
3221
3222
3223 static void handle_set_tim_queue(void *data)
3224 {
3225         local_info_t *local = (local_info_t *) data;
3226         struct set_tim_data *entry;
3227         u16 val;
3228
3229         for (;;) {
3230                 entry = NULL;
3231                 spin_lock_bh(&local->set_tim_lock);
3232                 if (!list_empty(&local->set_tim_list)) {
3233                         entry = list_entry(local->set_tim_list.next,
3234                                            struct set_tim_data, list);
3235                         list_del(&entry->list);
3236                 }
3237                 spin_unlock_bh(&local->set_tim_lock);
3238                 if (!entry)
3239                         break;
3240
3241                 PDEBUG(DEBUG_PS2, "%s: handle_set_tim_queue: aid=%d set=%d\n",
3242                        local->dev->name, entry->aid, entry->set);
3243
3244                 val = entry->aid;
3245                 if (entry->set)
3246                         val |= 0x8000;
3247                 if (hostap_set_word(local->dev, HFA384X_RID_CNFTIMCTRL, val)) {
3248                         printk(KERN_DEBUG "%s: set_tim failed (aid=%d "
3249                                "set=%d)\n",
3250                                local->dev->name, entry->aid, entry->set);
3251                 }
3252
3253                 kfree(entry);
3254         }
3255 }
3256
3257
3258 static void prism2_clear_set_tim_queue(local_info_t *local)
3259 {
3260         struct list_head *ptr, *n;
3261
3262         list_for_each_safe(ptr, n, &local->set_tim_list) {
3263                 struct set_tim_data *entry;
3264                 entry = list_entry(ptr, struct set_tim_data, list);
3265                 list_del(&entry->list);
3266                 kfree(entry);
3267         }
3268 }
3269
3270
3271 static struct net_device *
3272 prism2_init_local_data(struct prism2_helper_functions *funcs, int card_idx,
3273                        struct device *sdev)
3274 {
3275         struct net_device *dev;
3276         struct hostap_interface *iface;
3277         struct local_info *local;
3278         int len, i, ret;
3279
3280         if (funcs == NULL)
3281                 return NULL;
3282
3283         len = strlen(dev_template);
3284         if (len >= IFNAMSIZ || strstr(dev_template, "%d") == NULL) {
3285                 printk(KERN_WARNING "hostap: Invalid dev_template='%s'\n",
3286                        dev_template);
3287                 return NULL;
3288         }
3289
3290         len = sizeof(struct hostap_interface) +
3291                 3 + sizeof(struct local_info) +
3292                 3 + sizeof(struct ap_data);
3293
3294         dev = alloc_etherdev(len);
3295         if (dev == NULL)
3296                 return NULL;
3297
3298         iface = netdev_priv(dev);
3299         local = (struct local_info *) ((((long) (iface + 1)) + 3) & ~3);
3300         local->ap = (struct ap_data *) ((((long) (local + 1)) + 3) & ~3);
3301         local->dev = iface->dev = dev;
3302         iface->local = local;
3303         iface->type = HOSTAP_INTERFACE_MASTER;
3304         INIT_LIST_HEAD(&local->hostap_interfaces);
3305
3306         local->hw_module = THIS_MODULE;
3307
3308 #ifdef PRISM2_IO_DEBUG
3309         local->io_debug_enabled = 1;
3310 #endif /* PRISM2_IO_DEBUG */
3311
3312 #if defined(PRISM2_PCI) && defined(PRISM2_BUS_MASTER)
3313         local->bus_m0_buf = (u8 *) kmalloc(sizeof(struct hfa384x_tx_frame) +
3314                                            PRISM2_DATA_MAXLEN, GFP_DMA);
3315         if (local->bus_m0_buf == NULL)
3316                 goto fail;
3317 #endif /* PRISM2_PCI and PRISM2_BUS_MASTER */
3318
3319         local->func = funcs;
3320         local->func->cmd = hfa384x_cmd;
3321         local->func->read_regs = hfa384x_read_regs;
3322         local->func->get_rid = hfa384x_get_rid;
3323         local->func->set_rid = hfa384x_set_rid;
3324         local->func->hw_enable = prism2_hw_enable;
3325         local->func->hw_config = prism2_hw_config;
3326         local->func->hw_reset = prism2_hw_reset;
3327         local->func->hw_shutdown = prism2_hw_shutdown;
3328         local->func->reset_port = prism2_reset_port;
3329         local->func->schedule_reset = prism2_schedule_reset;
3330 #ifdef PRISM2_DOWNLOAD_SUPPORT
3331         local->func->read_aux = prism2_download_aux_dump;
3332         local->func->download = prism2_download;
3333 #endif /* PRISM2_DOWNLOAD_SUPPORT */
3334         local->func->tx = prism2_tx_80211;
3335         local->func->set_tim = prism2_set_tim;
3336         local->func->need_tx_headroom = 0; /* no need to add txdesc in
3337                                             * skb->data (FIX: maybe for DMA bus
3338                                             * mastering? */
3339
3340         local->mtu = mtu;
3341
3342         rwlock_init(&local->iface_lock);
3343         spin_lock_init(&local->txfidlock);
3344         spin_lock_init(&local->cmdlock);
3345         spin_lock_init(&local->baplock);
3346         spin_lock_init(&local->lock);
3347         init_MUTEX(&local->rid_bap_sem);
3348
3349         if (card_idx < 0 || card_idx >= MAX_PARM_DEVICES)
3350                 card_idx = 0;
3351         local->card_idx = card_idx;
3352
3353         len = strlen(essid);
3354         memcpy(local->essid, essid,
3355                len > MAX_SSID_LEN ? MAX_SSID_LEN : len);
3356         local->essid[MAX_SSID_LEN] = '\0';
3357         i = GET_INT_PARM(iw_mode, card_idx);
3358         if ((i >= IW_MODE_ADHOC && i <= IW_MODE_REPEAT) ||
3359             i == IW_MODE_MONITOR) {
3360                 local->iw_mode = i;
3361         } else {
3362                 printk(KERN_WARNING "prism2: Unknown iw_mode %d; using "
3363                        "IW_MODE_MASTER\n", i);
3364                 local->iw_mode = IW_MODE_MASTER;
3365         }
3366         local->channel = GET_INT_PARM(channel, card_idx);
3367         local->beacon_int = GET_INT_PARM(beacon_int, card_idx);
3368         local->dtim_period = GET_INT_PARM(dtim_period, card_idx);
3369         local->wds_max_connections = 16;
3370         local->tx_control = HFA384X_TX_CTRL_FLAGS;
3371         local->manual_retry_count = -1;
3372         local->rts_threshold = 2347;
3373         local->fragm_threshold = 2346;
3374         local->rssi_to_dBm = 100; /* default; to be overriden by
3375                                    * cnfDbmAdjust, if available */
3376         local->auth_algs = PRISM2_AUTH_OPEN | PRISM2_AUTH_SHARED_KEY;
3377         local->sram_type = -1;
3378         local->scan_channel_mask = 0xffff;
3379 #if defined(PRISM2_PCI) && defined(PRISM2_BUS_MASTER)
3380         local->bus_master_threshold_rx = GET_INT_PARM(bus_master_threshold_rx,
3381                                                       card_idx);
3382         local->bus_master_threshold_tx = GET_INT_PARM(bus_master_threshold_tx,
3383                                                       card_idx);
3384 #endif /* PRISM2_PCI and PRISM2_BUS_MASTER */
3385
3386         /* Initialize task queue structures */
3387         INIT_WORK(&local->reset_queue, handle_reset_queue, local);
3388         INIT_WORK(&local->set_multicast_list_queue,
3389                   hostap_set_multicast_list_queue, local->dev);
3390
3391         INIT_WORK(&local->set_tim_queue, handle_set_tim_queue, local);
3392         INIT_LIST_HEAD(&local->set_tim_list);
3393         spin_lock_init(&local->set_tim_lock);
3394
3395         INIT_WORK(&local->comms_qual_update, handle_comms_qual_update, local);
3396
3397         /* Initialize tasklets for handling hardware IRQ related operations
3398          * outside hw IRQ handler */
3399 #define HOSTAP_TASKLET_INIT(q, f, d) \
3400 do { memset((q), 0, sizeof(*(q))); (q)->func = (f); (q)->data = (d); } \
3401 while (0)
3402         HOSTAP_TASKLET_INIT(&local->bap_tasklet, hostap_bap_tasklet,
3403                             (unsigned long) local);
3404
3405         HOSTAP_TASKLET_INIT(&local->info_tasklet, hostap_info_tasklet,
3406                             (unsigned long) local);
3407         hostap_info_init(local);
3408
3409         HOSTAP_TASKLET_INIT(&local->rx_tasklet,
3410                             hostap_rx_tasklet, (unsigned long) local);
3411         skb_queue_head_init(&local->rx_list);
3412
3413         HOSTAP_TASKLET_INIT(&local->sta_tx_exc_tasklet,
3414                             hostap_sta_tx_exc_tasklet, (unsigned long) local);
3415         skb_queue_head_init(&local->sta_tx_exc_list);
3416
3417         INIT_LIST_HEAD(&local->cmd_queue);
3418         init_waitqueue_head(&local->hostscan_wq);
3419         INIT_LIST_HEAD(&local->crypt_deinit_list);
3420         init_timer(&local->crypt_deinit_timer);
3421         local->crypt_deinit_timer.data = (unsigned long) local;
3422         local->crypt_deinit_timer.function = prism2_crypt_deinit_handler;
3423
3424         init_timer(&local->passive_scan_timer);
3425         local->passive_scan_timer.data = (unsigned long) local;
3426         local->passive_scan_timer.function = hostap_passive_scan;
3427
3428         init_timer(&local->tick_timer);
3429         local->tick_timer.data = (unsigned long) local;
3430         local->tick_timer.function = hostap_tick_timer;
3431         local->tick_timer.expires = jiffies + 2 * HZ;
3432         add_timer(&local->tick_timer);
3433
3434         INIT_LIST_HEAD(&local->bss_list);
3435
3436         hostap_setup_dev(dev, local, 1);
3437         local->saved_eth_header_parse = dev->hard_header_parse;
3438
3439         dev->hard_start_xmit = hostap_master_start_xmit;
3440         dev->type = ARPHRD_IEEE80211;
3441         dev->hard_header_parse = hostap_80211_header_parse;
3442
3443         rtnl_lock();
3444         ret = dev_alloc_name(dev, "wifi%d");
3445         SET_NETDEV_DEV(dev, sdev);
3446         if (ret >= 0)
3447                 ret = register_netdevice(dev);
3448         rtnl_unlock();
3449         if (ret < 0) {
3450                 printk(KERN_WARNING "%s: register netdevice failed!\n",
3451                        dev_info);
3452                 goto fail;
3453         }
3454         printk(KERN_INFO "%s: Registered netdevice %s\n", dev_info, dev->name);
3455
3456 #ifndef PRISM2_NO_PROCFS_DEBUG
3457         create_proc_read_entry("registers", 0, local->proc,
3458                                prism2_registers_proc_read, local);
3459 #endif /* PRISM2_NO_PROCFS_DEBUG */
3460
3461         hostap_init_data(local);
3462         return dev;
3463
3464  fail:
3465 #if defined(PRISM2_PCI) && defined(PRISM2_BUS_MASTER)
3466         kfree(local->bus_m0_buf);
3467 #endif /* PRISM2_PCI and PRISM2_BUS_MASTER */
3468         free_netdev(dev);
3469         return NULL;
3470 }
3471
3472
3473 static int hostap_hw_ready(struct net_device *dev)
3474 {
3475         struct hostap_interface *iface;
3476         struct local_info *local;
3477
3478         iface = netdev_priv(dev);
3479         local = iface->local;
3480         local->ddev = hostap_add_interface(local, HOSTAP_INTERFACE_MAIN, 0,
3481                                            "", dev_template);
3482
3483         if (local->ddev) {
3484                 if (local->iw_mode == IW_MODE_INFRA ||
3485                     local->iw_mode == IW_MODE_ADHOC) {
3486                         netif_carrier_off(local->dev);
3487                         netif_carrier_off(local->ddev);
3488                 }
3489                 hostap_init_proc(local);
3490                 hostap_init_ap_proc(local);
3491                 return 0;
3492         }
3493
3494         return -1;
3495 }
3496
3497
3498 static void prism2_free_local_data(struct net_device *dev)
3499 {
3500         struct hostap_tx_callback_info *tx_cb, *tx_cb_prev;
3501         int i;
3502         struct hostap_interface *iface;
3503         struct local_info *local;
3504         struct list_head *ptr, *n;
3505
3506         if (dev == NULL)
3507                 return;
3508
3509         iface = netdev_priv(dev);
3510         local = iface->local;
3511
3512         flush_scheduled_work();
3513
3514         if (timer_pending(&local->crypt_deinit_timer))
3515                 del_timer(&local->crypt_deinit_timer);
3516         prism2_crypt_deinit_entries(local, 1);
3517
3518         if (timer_pending(&local->passive_scan_timer))
3519                 del_timer(&local->passive_scan_timer);
3520
3521         if (timer_pending(&local->tick_timer))
3522                 del_timer(&local->tick_timer);
3523
3524         prism2_clear_cmd_queue(local);
3525
3526         skb_queue_purge(&local->info_list);
3527         skb_queue_purge(&local->rx_list);
3528         skb_queue_purge(&local->sta_tx_exc_list);
3529
3530         if (local->dev_enabled)
3531                 prism2_callback(local, PRISM2_CALLBACK_DISABLE);
3532
3533         for (i = 0; i < WEP_KEYS; i++) {
3534                 struct ieee80211_crypt_data *crypt = local->crypt[i];
3535                 if (crypt) {
3536                         if (crypt->ops)
3537                                 crypt->ops->deinit(crypt->priv);
3538                         kfree(crypt);
3539                         local->crypt[i] = NULL;
3540                 }
3541         }
3542
3543         if (local->ap != NULL)
3544                 hostap_free_data(local->ap);
3545
3546 #ifndef PRISM2_NO_PROCFS_DEBUG
3547         if (local->proc != NULL)
3548                 remove_proc_entry("registers", local->proc);
3549 #endif /* PRISM2_NO_PROCFS_DEBUG */
3550         hostap_remove_proc(local);
3551
3552         tx_cb = local->tx_callback;
3553         while (tx_cb != NULL) {
3554                 tx_cb_prev = tx_cb;
3555                 tx_cb = tx_cb->next;
3556                 kfree(tx_cb_prev);
3557         }
3558
3559         hostap_set_hostapd(local, 0, 0);
3560         hostap_set_hostapd_sta(local, 0, 0);
3561
3562         for (i = 0; i < PRISM2_FRAG_CACHE_LEN; i++) {
3563                 if (local->frag_cache[i].skb != NULL)
3564                         dev_kfree_skb(local->frag_cache[i].skb);
3565         }
3566
3567 #ifdef PRISM2_DOWNLOAD_SUPPORT
3568         prism2_download_free_data(local->dl_pri);
3569         prism2_download_free_data(local->dl_sec);
3570 #endif /* PRISM2_DOWNLOAD_SUPPORT */
3571
3572         list_for_each_safe(ptr, n, &local->hostap_interfaces) {
3573                 iface = list_entry(ptr, struct hostap_interface, list);
3574                 if (iface->type == HOSTAP_INTERFACE_MASTER) {
3575                         /* special handling for this interface below */
3576                         continue;
3577                 }
3578                 hostap_remove_interface(iface->dev, 0, 1);
3579         }
3580
3581         prism2_clear_set_tim_queue(local);
3582
3583         list_for_each_safe(ptr, n, &local->bss_list) {
3584                 struct hostap_bss_info *bss =
3585                         list_entry(ptr, struct hostap_bss_info, list);
3586                 kfree(bss);
3587         }
3588
3589 #if defined(PRISM2_PCI) && defined(PRISM2_BUS_MASTER)
3590         kfree(local->bus_m0_buf);
3591 #endif /* PRISM2_PCI and PRISM2_BUS_MASTER */
3592         kfree(local->pda);
3593         kfree(local->last_scan_results);
3594         kfree(local->generic_elem);
3595
3596         unregister_netdev(local->dev);
3597         free_netdev(local->dev);
3598 }
3599
3600
3601 #ifndef PRISM2_PLX
3602 static void prism2_suspend(struct net_device *dev)
3603 {
3604         struct hostap_interface *iface;
3605         struct local_info *local;
3606         union iwreq_data wrqu;
3607
3608         iface = dev->priv;
3609         local = iface->local;
3610
3611         /* Send disconnect event, e.g., to trigger reassociation after resume
3612          * if wpa_supplicant is used. */
3613         memset(&wrqu, 0, sizeof(wrqu));
3614         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
3615         wireless_send_event(local->dev, SIOCGIWAP, &wrqu, NULL);
3616
3617         /* Disable hardware and firmware */
3618         prism2_hw_shutdown(dev, 0);
3619 }
3620 #endif /* PRISM2_PLX */
3621
3622
3623 /* These might at some point be compiled separately and used as separate
3624  * kernel modules or linked into one */
3625 #ifdef PRISM2_DOWNLOAD_SUPPORT
3626 #include "hostap_download.c"
3627 #endif /* PRISM2_DOWNLOAD_SUPPORT */
3628
3629 #ifdef PRISM2_CALLBACK
3630 /* External hostap_callback.c file can be used to, e.g., blink activity led.
3631  * This can use platform specific code and must define prism2_callback()
3632  * function (if PRISM2_CALLBACK is not defined, these function calls are not
3633  * used. */
3634 #include "hostap_callback.c"
3635 #endif /* PRISM2_CALLBACK */