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spi-topcliff-pch: supports a spi mode setup and bit order setup by IO control
[zen-stable.git] / drivers / net / wireless / orinoco / main.c
blob9fb77d0319f5de9ffde985de3691d0b4554cf152
1 /* main.c - (formerly known as dldwd_cs.c, orinoco_cs.c and orinoco.c)
2 *
3 * A driver for Hermes or Prism 2 chipset based PCMCIA wireless
4 * adaptors, with Lucent/Agere, Intersil or Symbol firmware.
5 *
6 * Current maintainers (as of 29 September 2003) are:
7 * Pavel Roskin <proski AT gnu.org>
8 * and David Gibson <hermes AT gibson.dropbear.id.au>
9 *
10 * (C) Copyright David Gibson, IBM Corporation 2001-2003.
11 * Copyright (C) 2000 David Gibson, Linuxcare Australia.
12 * With some help from :
13 * Copyright (C) 2001 Jean Tourrilhes, HP Labs
14 * Copyright (C) 2001 Benjamin Herrenschmidt
15 *
16 * Based on dummy_cs.c 1.27 2000/06/12 21:27:25
17 *
18 * Portions based on wvlan_cs.c 1.0.6, Copyright Andreas Neuhaus <andy
19 * AT fasta.fh-dortmund.de>
20 * http://www.stud.fh-dortmund.de/~andy/wvlan/
21 *
22 * The contents of this file are subject to the Mozilla Public License
23 * Version 1.1 (the "License"); you may not use this file except in
24 * compliance with the License. You may obtain a copy of the License
25 * at http://www.mozilla.org/MPL/
26 *
27 * Software distributed under the License is distributed on an "AS IS"
28 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
29 * the License for the specific language governing rights and
30 * limitations under the License.
31 *
32 * The initial developer of the original code is David A. Hinds
33 * <dahinds AT users.sourceforge.net>. Portions created by David
34 * A. Hinds are Copyright (C) 1999 David A. Hinds. All Rights
35 * Reserved.
36 *
37 * Alternatively, the contents of this file may be used under the
38 * terms of the GNU General Public License version 2 (the "GPL"), in
39 * which case the provisions of the GPL are applicable instead of the
40 * above. If you wish to allow the use of your version of this file
41 * only under the terms of the GPL and not to allow others to use your
42 * version of this file under the MPL, indicate your decision by
43 * deleting the provisions above and replace them with the notice and
44 * other provisions required by the GPL. If you do not delete the
45 * provisions above, a recipient may use your version of this file
46 * under either the MPL or the GPL. */
47
48 /*
49 * TODO
50 * o Handle de-encapsulation within network layer, provide 802.11
51 * headers (patch from Thomas 'Dent' Mirlacher)
52 * o Fix possible races in SPY handling.
53 * o Disconnect wireless extensions from fundamental configuration.
54 * o (maybe) Software WEP support (patch from Stano Meduna).
55 * o (maybe) Use multiple Tx buffers - driver handling queue
56 * rather than firmware.
57 */
58
59 /* Locking and synchronization:
60 *
61 * The basic principle is that everything is serialized through a
62 * single spinlock, priv->lock. The lock is used in user, bh and irq
63 * context, so when taken outside hardirq context it should always be
64 * taken with interrupts disabled. The lock protects both the
65 * hardware and the struct orinoco_private.
66 *
67 * Another flag, priv->hw_unavailable indicates that the hardware is
68 * unavailable for an extended period of time (e.g. suspended, or in
69 * the middle of a hard reset). This flag is protected by the
70 * spinlock. All code which touches the hardware should check the
71 * flag after taking the lock, and if it is set, give up on whatever
72 * they are doing and drop the lock again. The orinoco_lock()
73 * function handles this (it unlocks and returns -EBUSY if
74 * hw_unavailable is non-zero).
75 */
76
77 #define DRIVER_NAME "orinoco"
78
79 #include <linux/module.h>
80 #include <linux/kernel.h>
81 #include <linux/slab.h>
82 #include <linux/init.h>
83 #include <linux/delay.h>
84 #include <linux/device.h>
85 #include <linux/netdevice.h>
86 #include <linux/etherdevice.h>
87 #include <linux/suspend.h>
88 #include <linux/if_arp.h>
89 #include <linux/wireless.h>
90 #include <linux/ieee80211.h>
91 #include <net/iw_handler.h>
92 #include <net/cfg80211.h>
93
94 #include "hermes_rid.h"
95 #include "hermes_dld.h"
96 #include "hw.h"
97 #include "scan.h"
98 #include "mic.h"
99 #include "fw.h"
100 #include "wext.h"
101 #include "cfg.h"
102 #include "main.h"
103
104 #include "orinoco.h"
105
106 /********************************************************************/
107 /* Module information */
108 /********************************************************************/
109
110 MODULE_AUTHOR("Pavel Roskin <proski@gnu.org> & "
111 "David Gibson <hermes@gibson.dropbear.id.au>");
112 MODULE_DESCRIPTION("Driver for Lucent Orinoco, Prism II based "
113 "and similar wireless cards");
114 MODULE_LICENSE("Dual MPL/GPL");
115
116 /* Level of debugging. Used in the macros in orinoco.h */
117 #ifdef ORINOCO_DEBUG
118 int orinoco_debug = ORINOCO_DEBUG;
119 EXPORT_SYMBOL(orinoco_debug);
120 module_param(orinoco_debug, int, 0644);
121 MODULE_PARM_DESC(orinoco_debug, "Debug level");
122 #endif
123
124 static bool suppress_linkstatus; /* = 0 */
125 module_param(suppress_linkstatus, bool, 0644);
126 MODULE_PARM_DESC(suppress_linkstatus, "Don't log link status changes");
127
128 static int ignore_disconnect; /* = 0 */
129 module_param(ignore_disconnect, int, 0644);
130 MODULE_PARM_DESC(ignore_disconnect,
131 "Don't report lost link to the network layer");
132
133 int force_monitor; /* = 0 */
134 module_param(force_monitor, int, 0644);
135 MODULE_PARM_DESC(force_monitor, "Allow monitor mode for all firmware versions");
136
137 /********************************************************************/
138 /* Internal constants */
139 /********************************************************************/
140
141 /* 802.2 LLC/SNAP header used for Ethernet encapsulation over 802.11 */
142 static const u8 encaps_hdr[] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00};
143 #define ENCAPS_OVERHEAD (sizeof(encaps_hdr) + 2)
144
145 #define ORINOCO_MIN_MTU 256
146 #define ORINOCO_MAX_MTU (IEEE80211_MAX_DATA_LEN - ENCAPS_OVERHEAD)
147
148 #define MAX_IRQLOOPS_PER_IRQ 10
149 #define MAX_IRQLOOPS_PER_JIFFY (20000 / HZ) /* Based on a guestimate of
150 * how many events the
151 * device could
152 * legitimately generate */
153
154 #define DUMMY_FID 0xFFFF
155
156 /*#define MAX_MULTICAST(priv) (priv->firmware_type == FIRMWARE_TYPE_AGERE ? \
157 HERMES_MAX_MULTICAST : 0)*/
158 #define MAX_MULTICAST(priv) (HERMES_MAX_MULTICAST)
159
160 #define ORINOCO_INTEN (HERMES_EV_RX | HERMES_EV_ALLOC \
161 | HERMES_EV_TX | HERMES_EV_TXEXC \
162 | HERMES_EV_WTERR | HERMES_EV_INFO \
163 | HERMES_EV_INFDROP)
164
165 /********************************************************************/
166 /* Data types */
167 /********************************************************************/
168
169 /* Beginning of the Tx descriptor, used in TxExc handling */
170 struct hermes_txexc_data {
171 struct hermes_tx_descriptor desc;
172 __le16 frame_ctl;
173 __le16 duration_id;
174 u8 addr1[ETH_ALEN];
175 } __packed;
176
177 /* Rx frame header except compatibility 802.3 header */
178 struct hermes_rx_descriptor {
179 /* Control */
180 __le16 status;
181 __le32 time;
182 u8 silence;
183 u8 signal;
184 u8 rate;
185 u8 rxflow;
186 __le32 reserved;
187
188 /* 802.11 header */
189 __le16 frame_ctl;
190 __le16 duration_id;
191 u8 addr1[ETH_ALEN];
192 u8 addr2[ETH_ALEN];
193 u8 addr3[ETH_ALEN];
194 __le16 seq_ctl;
195 u8 addr4[ETH_ALEN];
196
197 /* Data length */
198 __le16 data_len;
199 } __packed;
200
201 struct orinoco_rx_data {
202 struct hermes_rx_descriptor *desc;
203 struct sk_buff *skb;
204 struct list_head list;
205 };
206
207 struct orinoco_scan_data {
208 void *buf;
209 size_t len;
210 int type;
211 struct list_head list;
212 };
213
214 /********************************************************************/
215 /* Function prototypes */
216 /********************************************************************/
217
218 static int __orinoco_set_multicast_list(struct net_device *dev);
219 static int __orinoco_up(struct orinoco_private *priv);
220 static int __orinoco_down(struct orinoco_private *priv);
221 static int __orinoco_commit(struct orinoco_private *priv);
222
223 /********************************************************************/
224 /* Internal helper functions */
225 /********************************************************************/
226
227 void set_port_type(struct orinoco_private *priv)
228 {
229 switch (priv->iw_mode) {
230 case NL80211_IFTYPE_STATION:
231 priv->port_type = 1;
232 priv->createibss = 0;
233 break;
234 case NL80211_IFTYPE_ADHOC:
235 if (priv->prefer_port3) {
236 priv->port_type = 3;
237 priv->createibss = 0;
238 } else {
239 priv->port_type = priv->ibss_port;
240 priv->createibss = 1;
241 }
242 break;
243 case NL80211_IFTYPE_MONITOR:
244 priv->port_type = 3;
245 priv->createibss = 0;
246 break;
247 default:
248 printk(KERN_ERR "%s: Invalid priv->iw_mode in set_port_type()\n",
249 priv->ndev->name);
250 }
251 }
252
253 /********************************************************************/
254 /* Device methods */
255 /********************************************************************/
256
257 int orinoco_open(struct net_device *dev)
258 {
259 struct orinoco_private *priv = ndev_priv(dev);
260 unsigned long flags;
261 int err;
262
263 if (orinoco_lock(priv, &flags) != 0)
264 return -EBUSY;
265
266 err = __orinoco_up(priv);
267
268 if (!err)
269 priv->open = 1;
270
271 orinoco_unlock(priv, &flags);
272
273 return err;
274 }
275 EXPORT_SYMBOL(orinoco_open);
276
277 int orinoco_stop(struct net_device *dev)
278 {
279 struct orinoco_private *priv = ndev_priv(dev);
280 int err = 0;
281
282 /* We mustn't use orinoco_lock() here, because we need to be
283 able to close the interface even if hw_unavailable is set
284 (e.g. as we're released after a PC Card removal) */
285 orinoco_lock_irq(priv);
286
287 priv->open = 0;
288
289 err = __orinoco_down(priv);
290
291 orinoco_unlock_irq(priv);
292
293 return err;
294 }
295 EXPORT_SYMBOL(orinoco_stop);
296
297 struct net_device_stats *orinoco_get_stats(struct net_device *dev)
298 {
299 struct orinoco_private *priv = ndev_priv(dev);
300
301 return &priv->stats;
302 }
303 EXPORT_SYMBOL(orinoco_get_stats);
304
305 void orinoco_set_multicast_list(struct net_device *dev)
306 {
307 struct orinoco_private *priv = ndev_priv(dev);
308 unsigned long flags;
309
310 if (orinoco_lock(priv, &flags) != 0) {
311 printk(KERN_DEBUG "%s: orinoco_set_multicast_list() "
312 "called when hw_unavailable\n", dev->name);
313 return;
314 }
315
316 __orinoco_set_multicast_list(dev);
317 orinoco_unlock(priv, &flags);
318 }
319 EXPORT_SYMBOL(orinoco_set_multicast_list);
320
321 int orinoco_change_mtu(struct net_device *dev, int new_mtu)
322 {
323 struct orinoco_private *priv = ndev_priv(dev);
324
325 if ((new_mtu < ORINOCO_MIN_MTU) || (new_mtu > ORINOCO_MAX_MTU))
326 return -EINVAL;
327
328 /* MTU + encapsulation + header length */
329 if ((new_mtu + ENCAPS_OVERHEAD + sizeof(struct ieee80211_hdr)) >
330 (priv->nicbuf_size - ETH_HLEN))
331 return -EINVAL;
332
333 dev->mtu = new_mtu;
334
335 return 0;
336 }
337 EXPORT_SYMBOL(orinoco_change_mtu);
338
339 /********************************************************************/
340 /* Tx path */
341 /********************************************************************/
342
343 /* Add encapsulation and MIC to the existing SKB.
344 * The main xmit routine will then send the whole lot to the card.
345 * Need 8 bytes headroom
346 * Need 8 bytes tailroom
347 *
348 * With encapsulated ethernet II frame
349 * --------
350 * 803.3 header (14 bytes)
351 * dst[6]
352 * -------- src[6]
353 * 803.3 header (14 bytes) len[2]
354 * dst[6] 803.2 header (8 bytes)
355 * src[6] encaps[6]
356 * len[2] <- leave alone -> len[2]
357 * -------- -------- <-- 0
358 * Payload Payload
359 * ... ...
360 *
361 * -------- --------
362 * MIC (8 bytes)
363 * --------
364 *
365 * returns 0 on success, -ENOMEM on error.
366 */
367 int orinoco_process_xmit_skb(struct sk_buff *skb,
368 struct net_device *dev,
369 struct orinoco_private *priv,
370 int *tx_control,
371 u8 *mic_buf)
372 {
373 struct orinoco_tkip_key *key;
374 struct ethhdr *eh;
375 int do_mic;
376
377 key = (struct orinoco_tkip_key *) priv->keys[priv->tx_key].key;
378
379 do_mic = ((priv->encode_alg == ORINOCO_ALG_TKIP) &&
380 (key != NULL));
381
382 if (do_mic)
383 *tx_control |= (priv->tx_key << HERMES_MIC_KEY_ID_SHIFT) |
384 HERMES_TXCTRL_MIC;
385
386 eh = (struct ethhdr *)skb->data;
387
388 /* Encapsulate Ethernet-II frames */
389 if (ntohs(eh->h_proto) > ETH_DATA_LEN) { /* Ethernet-II frame */
390 struct header_struct {
391 struct ethhdr eth; /* 802.3 header */
392 u8 encap[6]; /* 802.2 header */
393 } __packed hdr;
394 int len = skb->len + sizeof(encaps_hdr) - (2 * ETH_ALEN);
395
396 if (skb_headroom(skb) < ENCAPS_OVERHEAD) {
397 if (net_ratelimit())
398 printk(KERN_ERR
399 "%s: Not enough headroom for 802.2 headers %d\n",
400 dev->name, skb_headroom(skb));
401 return -ENOMEM;
402 }
403
404 /* Fill in new header */
405 memcpy(&hdr.eth, eh, 2 * ETH_ALEN);
406 hdr.eth.h_proto = htons(len);
407 memcpy(hdr.encap, encaps_hdr, sizeof(encaps_hdr));
408
409 /* Make room for the new header, and copy it in */
410 eh = (struct ethhdr *) skb_push(skb, ENCAPS_OVERHEAD);
411 memcpy(eh, &hdr, sizeof(hdr));
412 }
413
414 /* Calculate Michael MIC */
415 if (do_mic) {
416 size_t len = skb->len - ETH_HLEN;
417 u8 *mic = &mic_buf[0];
418
419 /* Have to write to an even address, so copy the spare
420 * byte across */
421 if (skb->len % 2) {
422 *mic = skb->data[skb->len - 1];
423 mic++;
424 }
425
426 orinoco_mic(priv->tx_tfm_mic, key->tx_mic,
427 eh->h_dest, eh->h_source, 0 /* priority */,
428 skb->data + ETH_HLEN,
429 len, mic);
430 }
431
432 return 0;
433 }
434 EXPORT_SYMBOL(orinoco_process_xmit_skb);
435
436 static netdev_tx_t orinoco_xmit(struct sk_buff *skb, struct net_device *dev)
437 {
438 struct orinoco_private *priv = ndev_priv(dev);
439 struct net_device_stats *stats = &priv->stats;
440 struct hermes *hw = &priv->hw;
441 int err = 0;
442 u16 txfid = priv->txfid;
443 int tx_control;
444 unsigned long flags;
445 u8 mic_buf[MICHAEL_MIC_LEN + 1];
446
447 if (!netif_running(dev)) {
448 printk(KERN_ERR "%s: Tx on stopped device!\n",
449 dev->name);
450 return NETDEV_TX_BUSY;
451 }
452
453 if (netif_queue_stopped(dev)) {
454 printk(KERN_DEBUG "%s: Tx while transmitter busy!\n",
455 dev->name);
456 return NETDEV_TX_BUSY;
457 }
458
459 if (orinoco_lock(priv, &flags) != 0) {
460 printk(KERN_ERR "%s: orinoco_xmit() called while hw_unavailable\n",
461 dev->name);
462 return NETDEV_TX_BUSY;
463 }
464
465 if (!netif_carrier_ok(dev) ||
466 (priv->iw_mode == NL80211_IFTYPE_MONITOR)) {
467 /* Oops, the firmware hasn't established a connection,
468 silently drop the packet (this seems to be the
469 safest approach). */
470 goto drop;
471 }
472
473 /* Check packet length */
474 if (skb->len < ETH_HLEN)
475 goto drop;
476
477 tx_control = HERMES_TXCTRL_TX_OK | HERMES_TXCTRL_TX_EX;
478
479 err = orinoco_process_xmit_skb(skb, dev, priv, &tx_control,
480 &mic_buf[0]);
481 if (err)
482 goto drop;
483
484 if (priv->has_alt_txcntl) {
485 /* WPA enabled firmwares have tx_cntl at the end of
486 * the 802.11 header. So write zeroed descriptor and
487 * 802.11 header at the same time
488 */
489 char desc[HERMES_802_3_OFFSET];
490 __le16 *txcntl = (__le16 *) &desc[HERMES_TXCNTL2_OFFSET];
491
492 memset(&desc, 0, sizeof(desc));
493
494 *txcntl = cpu_to_le16(tx_control);
495 err = hw->ops->bap_pwrite(hw, USER_BAP, &desc, sizeof(desc),
496 txfid, 0);
497 if (err) {
498 if (net_ratelimit())
499 printk(KERN_ERR "%s: Error %d writing Tx "
500 "descriptor to BAP\n", dev->name, err);
501 goto busy;
502 }
503 } else {
504 struct hermes_tx_descriptor desc;
505
506 memset(&desc, 0, sizeof(desc));
507
508 desc.tx_control = cpu_to_le16(tx_control);
509 err = hw->ops->bap_pwrite(hw, USER_BAP, &desc, sizeof(desc),
510 txfid, 0);
511 if (err) {
512 if (net_ratelimit())
513 printk(KERN_ERR "%s: Error %d writing Tx "
514 "descriptor to BAP\n", dev->name, err);
515 goto busy;
516 }
517
518 /* Clear the 802.11 header and data length fields - some
519 * firmwares (e.g. Lucent/Agere 8.xx) appear to get confused
520 * if this isn't done. */
521 hermes_clear_words(hw, HERMES_DATA0,
522 HERMES_802_3_OFFSET - HERMES_802_11_OFFSET);
523 }
524
525 err = hw->ops->bap_pwrite(hw, USER_BAP, skb->data, skb->len,
526 txfid, HERMES_802_3_OFFSET);
527 if (err) {
528 printk(KERN_ERR "%s: Error %d writing packet to BAP\n",
529 dev->name, err);
530 goto busy;
531 }
532
533 if (tx_control & HERMES_TXCTRL_MIC) {
534 size_t offset = HERMES_802_3_OFFSET + skb->len;
535 size_t len = MICHAEL_MIC_LEN;
536
537 if (offset % 2) {
538 offset--;
539 len++;
540 }
541 err = hw->ops->bap_pwrite(hw, USER_BAP, &mic_buf[0], len,
542 txfid, offset);
543 if (err) {
544 printk(KERN_ERR "%s: Error %d writing MIC to BAP\n",
545 dev->name, err);
546 goto busy;
547 }
548 }
549
550 /* Finally, we actually initiate the send */
551 netif_stop_queue(dev);
552
553 err = hw->ops->cmd_wait(hw, HERMES_CMD_TX | HERMES_CMD_RECL,
554 txfid, NULL);
555 if (err) {
556 netif_start_queue(dev);
557 if (net_ratelimit())
558 printk(KERN_ERR "%s: Error %d transmitting packet\n",
559 dev->name, err);
560 goto busy;
561 }
562
563 stats->tx_bytes += HERMES_802_3_OFFSET + skb->len;
564 goto ok;
565
566 drop:
567 stats->tx_errors++;
568 stats->tx_dropped++;
569
570 ok:
571 orinoco_unlock(priv, &flags);
572 dev_kfree_skb(skb);
573 return NETDEV_TX_OK;
574
575 busy:
576 if (err == -EIO)
577 schedule_work(&priv->reset_work);
578 orinoco_unlock(priv, &flags);
579 return NETDEV_TX_BUSY;
580 }
581
582 static void __orinoco_ev_alloc(struct net_device *dev, struct hermes *hw)
583 {
584 struct orinoco_private *priv = ndev_priv(dev);
585 u16 fid = hermes_read_regn(hw, ALLOCFID);
586
587 if (fid != priv->txfid) {
588 if (fid != DUMMY_FID)
589 printk(KERN_WARNING "%s: Allocate event on unexpected fid (%04X)\n",
590 dev->name, fid);
591 return;
592 }
593
594 hermes_write_regn(hw, ALLOCFID, DUMMY_FID);
595 }
596
597 static void __orinoco_ev_tx(struct net_device *dev, struct hermes *hw)
598 {
599 struct orinoco_private *priv = ndev_priv(dev);
600 struct net_device_stats *stats = &priv->stats;
601
602 stats->tx_packets++;
603
604 netif_wake_queue(dev);
605
606 hermes_write_regn(hw, TXCOMPLFID, DUMMY_FID);
607 }
608
609 static void __orinoco_ev_txexc(struct net_device *dev, struct hermes *hw)
610 {
611 struct orinoco_private *priv = ndev_priv(dev);
612 struct net_device_stats *stats = &priv->stats;
613 u16 fid = hermes_read_regn(hw, TXCOMPLFID);
614 u16 status;
615 struct hermes_txexc_data hdr;
616 int err = 0;
617
618 if (fid == DUMMY_FID)
619 return; /* Nothing's really happened */
620
621 /* Read part of the frame header - we need status and addr1 */
622 err = hw->ops->bap_pread(hw, IRQ_BAP, &hdr,
623 sizeof(struct hermes_txexc_data),
624 fid, 0);
625
626 hermes_write_regn(hw, TXCOMPLFID, DUMMY_FID);
627 stats->tx_errors++;
628
629 if (err) {
630 printk(KERN_WARNING "%s: Unable to read descriptor on Tx error "
631 "(FID=%04X error %d)\n",
632 dev->name, fid, err);
633 return;
634 }
635
636 DEBUG(1, "%s: Tx error, err %d (FID=%04X)\n", dev->name,
637 err, fid);
638
639 /* We produce a TXDROP event only for retry or lifetime
640 * exceeded, because that's the only status that really mean
641 * that this particular node went away.
642 * Other errors means that *we* screwed up. - Jean II */
643 status = le16_to_cpu(hdr.desc.status);
644 if (status & (HERMES_TXSTAT_RETRYERR | HERMES_TXSTAT_AGEDERR)) {
645 union iwreq_data wrqu;
646
647 /* Copy 802.11 dest address.
648 * We use the 802.11 header because the frame may
649 * not be 802.3 or may be mangled...
650 * In Ad-Hoc mode, it will be the node address.
651 * In managed mode, it will be most likely the AP addr
652 * User space will figure out how to convert it to
653 * whatever it needs (IP address or else).
654 * - Jean II */
655 memcpy(wrqu.addr.sa_data, hdr.addr1, ETH_ALEN);
656 wrqu.addr.sa_family = ARPHRD_ETHER;
657
658 /* Send event to user space */
659 wireless_send_event(dev, IWEVTXDROP, &wrqu, NULL);
660 }
661
662 netif_wake_queue(dev);
663 }
664
665 void orinoco_tx_timeout(struct net_device *dev)
666 {
667 struct orinoco_private *priv = ndev_priv(dev);
668 struct net_device_stats *stats = &priv->stats;
669 struct hermes *hw = &priv->hw;
670
671 printk(KERN_WARNING "%s: Tx timeout! "
672 "ALLOCFID=%04x, TXCOMPLFID=%04x, EVSTAT=%04x\n",
673 dev->name, hermes_read_regn(hw, ALLOCFID),
674 hermes_read_regn(hw, TXCOMPLFID), hermes_read_regn(hw, EVSTAT));
675
676 stats->tx_errors++;
677
678 schedule_work(&priv->reset_work);
679 }
680 EXPORT_SYMBOL(orinoco_tx_timeout);
681
682 /********************************************************************/
683 /* Rx path (data frames) */
684 /********************************************************************/
685
686 /* Does the frame have a SNAP header indicating it should be
687 * de-encapsulated to Ethernet-II? */
688 static inline int is_ethersnap(void *_hdr)
689 {
690 u8 *hdr = _hdr;
691
692 /* We de-encapsulate all packets which, a) have SNAP headers
693 * (i.e. SSAP=DSAP=0xaa and CTRL=0x3 in the 802.2 LLC header
694 * and where b) the OUI of the SNAP header is 00:00:00 or
695 * 00:00:f8 - we need both because different APs appear to use
696 * different OUIs for some reason */
697 return (memcmp(hdr, &encaps_hdr, 5) == 0)
698 && ((hdr[5] == 0x00) || (hdr[5] == 0xf8));
699 }
700
701 static inline void orinoco_spy_gather(struct net_device *dev, u_char *mac,
702 int level, int noise)
703 {
704 struct iw_quality wstats;
705 wstats.level = level - 0x95;
706 wstats.noise = noise - 0x95;
707 wstats.qual = (level > noise) ? (level - noise) : 0;
708 wstats.updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM;
709 /* Update spy records */
710 wireless_spy_update(dev, mac, &wstats);
711 }
712
713 static void orinoco_stat_gather(struct net_device *dev,
714 struct sk_buff *skb,
715 struct hermes_rx_descriptor *desc)
716 {
717 struct orinoco_private *priv = ndev_priv(dev);
718
719 /* Using spy support with lots of Rx packets, like in an
720 * infrastructure (AP), will really slow down everything, because
721 * the MAC address must be compared to each entry of the spy list.
722 * If the user really asks for it (set some address in the
723 * spy list), we do it, but he will pay the price.
724 * Note that to get here, you need both WIRELESS_SPY
725 * compiled in AND some addresses in the list !!!
726 */
727 /* Note : gcc will optimise the whole section away if
728 * WIRELESS_SPY is not defined... - Jean II */
729 if (SPY_NUMBER(priv)) {
730 orinoco_spy_gather(dev, skb_mac_header(skb) + ETH_ALEN,
731 desc->signal, desc->silence);
732 }
733 }
734
735 /*
736 * orinoco_rx_monitor - handle received monitor frames.
737 *
738 * Arguments:
739 * dev network device
740 * rxfid received FID
741 * desc rx descriptor of the frame
742 *
743 * Call context: interrupt
744 */
745 static void orinoco_rx_monitor(struct net_device *dev, u16 rxfid,
746 struct hermes_rx_descriptor *desc)
747 {
748 u32 hdrlen = 30; /* return full header by default */
749 u32 datalen = 0;
750 u16 fc;
751 int err;
752 int len;
753 struct sk_buff *skb;
754 struct orinoco_private *priv = ndev_priv(dev);
755 struct net_device_stats *stats = &priv->stats;
756 struct hermes *hw = &priv->hw;
757
758 len = le16_to_cpu(desc->data_len);
759
760 /* Determine the size of the header and the data */
761 fc = le16_to_cpu(desc->frame_ctl);
762 switch (fc & IEEE80211_FCTL_FTYPE) {
763 case IEEE80211_FTYPE_DATA:
764 if ((fc & IEEE80211_FCTL_TODS)
765 && (fc & IEEE80211_FCTL_FROMDS))
766 hdrlen = 30;
767 else
768 hdrlen = 24;
769 datalen = len;
770 break;
771 case IEEE80211_FTYPE_MGMT:
772 hdrlen = 24;
773 datalen = len;
774 break;
775 case IEEE80211_FTYPE_CTL:
776 switch (fc & IEEE80211_FCTL_STYPE) {
777 case IEEE80211_STYPE_PSPOLL:
778 case IEEE80211_STYPE_RTS:
779 case IEEE80211_STYPE_CFEND:
780 case IEEE80211_STYPE_CFENDACK:
781 hdrlen = 16;
782 break;
783 case IEEE80211_STYPE_CTS:
784 case IEEE80211_STYPE_ACK:
785 hdrlen = 10;
786 break;
787 }
788 break;
789 default:
790 /* Unknown frame type */
791 break;
792 }
793
794 /* sanity check the length */
795 if (datalen > IEEE80211_MAX_DATA_LEN + 12) {
796 printk(KERN_DEBUG "%s: oversized monitor frame, "
797 "data length = %d\n", dev->name, datalen);
798 stats->rx_length_errors++;
799 goto update_stats;
800 }
801
802 skb = dev_alloc_skb(hdrlen + datalen);
803 if (!skb) {
804 printk(KERN_WARNING "%s: Cannot allocate skb for monitor frame\n",
805 dev->name);
806 goto update_stats;
807 }
808
809 /* Copy the 802.11 header to the skb */
810 memcpy(skb_put(skb, hdrlen), &(desc->frame_ctl), hdrlen);
811 skb_reset_mac_header(skb);
812
813 /* If any, copy the data from the card to the skb */
814 if (datalen > 0) {
815 err = hw->ops->bap_pread(hw, IRQ_BAP, skb_put(skb, datalen),
816 ALIGN(datalen, 2), rxfid,
817 HERMES_802_2_OFFSET);
818 if (err) {
819 printk(KERN_ERR "%s: error %d reading monitor frame\n",
820 dev->name, err);
821 goto drop;
822 }
823 }
824
825 skb->dev = dev;
826 skb->ip_summed = CHECKSUM_NONE;
827 skb->pkt_type = PACKET_OTHERHOST;
828 skb->protocol = cpu_to_be16(ETH_P_802_2);
829
830 stats->rx_packets++;
831 stats->rx_bytes += skb->len;
832
833 netif_rx(skb);
834 return;
835
836 drop:
837 dev_kfree_skb_irq(skb);
838 update_stats:
839 stats->rx_errors++;
840 stats->rx_dropped++;
841 }
842
843 void __orinoco_ev_rx(struct net_device *dev, struct hermes *hw)
844 {
845 struct orinoco_private *priv = ndev_priv(dev);
846 struct net_device_stats *stats = &priv->stats;
847 struct iw_statistics *wstats = &priv->wstats;
848 struct sk_buff *skb = NULL;
849 u16 rxfid, status;
850 int length;
851 struct hermes_rx_descriptor *desc;
852 struct orinoco_rx_data *rx_data;
853 int err;
854
855 desc = kmalloc(sizeof(*desc), GFP_ATOMIC);
856 if (!desc) {
857 printk(KERN_WARNING
858 "%s: Can't allocate space for RX descriptor\n",
859 dev->name);
860 goto update_stats;
861 }
862
863 rxfid = hermes_read_regn(hw, RXFID);
864
865 err = hw->ops->bap_pread(hw, IRQ_BAP, desc, sizeof(*desc),
866 rxfid, 0);
867 if (err) {
868 printk(KERN_ERR "%s: error %d reading Rx descriptor. "
869 "Frame dropped.\n", dev->name, err);
870 goto update_stats;
871 }
872
873 status = le16_to_cpu(desc->status);
874
875 if (status & HERMES_RXSTAT_BADCRC) {
876 DEBUG(1, "%s: Bad CRC on Rx. Frame dropped.\n",
877 dev->name);
878 stats->rx_crc_errors++;
879 goto update_stats;
880 }
881
882 /* Handle frames in monitor mode */
883 if (priv->iw_mode == NL80211_IFTYPE_MONITOR) {
884 orinoco_rx_monitor(dev, rxfid, desc);
885 goto out;
886 }
887
888 if (status & HERMES_RXSTAT_UNDECRYPTABLE) {
889 DEBUG(1, "%s: Undecryptable frame on Rx. Frame dropped.\n",
890 dev->name);
891 wstats->discard.code++;
892 goto update_stats;
893 }
894
895 length = le16_to_cpu(desc->data_len);
896
897 /* Sanity checks */
898 if (length < 3) { /* No for even an 802.2 LLC header */
899 /* At least on Symbol firmware with PCF we get quite a
900 lot of these legitimately - Poll frames with no
901 data. */
902 goto out;
903 }
904 if (length > IEEE80211_MAX_DATA_LEN) {
905 printk(KERN_WARNING "%s: Oversized frame received (%d bytes)\n",
906 dev->name, length);
907 stats->rx_length_errors++;
908 goto update_stats;
909 }
910
911 /* Payload size does not include Michael MIC. Increase payload
912 * size to read it together with the data. */
913 if (status & HERMES_RXSTAT_MIC)
914 length += MICHAEL_MIC_LEN;
915
916 /* We need space for the packet data itself, plus an ethernet
917 header, plus 2 bytes so we can align the IP header on a
918 32bit boundary, plus 1 byte so we can read in odd length
919 packets from the card, which has an IO granularity of 16
920 bits */
921 skb = dev_alloc_skb(length + ETH_HLEN + 2 + 1);
922 if (!skb) {
923 printk(KERN_WARNING "%s: Can't allocate skb for Rx\n",
924 dev->name);
925 goto update_stats;
926 }
927
928 /* We'll prepend the header, so reserve space for it. The worst
929 case is no decapsulation, when 802.3 header is prepended and
930 nothing is removed. 2 is for aligning the IP header. */
931 skb_reserve(skb, ETH_HLEN + 2);
932
933 err = hw->ops->bap_pread(hw, IRQ_BAP, skb_put(skb, length),
934 ALIGN(length, 2), rxfid,
935 HERMES_802_2_OFFSET);
936 if (err) {
937 printk(KERN_ERR "%s: error %d reading frame. "
938 "Frame dropped.\n", dev->name, err);
939 goto drop;
940 }
941
942 /* Add desc and skb to rx queue */
943 rx_data = kzalloc(sizeof(*rx_data), GFP_ATOMIC);
944 if (!rx_data) {
945 printk(KERN_WARNING "%s: Can't allocate RX packet\n",
946 dev->name);
947 goto drop;
948 }
949 rx_data->desc = desc;
950 rx_data->skb = skb;
951 list_add_tail(&rx_data->list, &priv->rx_list);
952 tasklet_schedule(&priv->rx_tasklet);
953
954 return;
955
956 drop:
957 dev_kfree_skb_irq(skb);
958 update_stats:
959 stats->rx_errors++;
960 stats->rx_dropped++;
961 out:
962 kfree(desc);
963 }
964 EXPORT_SYMBOL(__orinoco_ev_rx);
965
966 static void orinoco_rx(struct net_device *dev,
967 struct hermes_rx_descriptor *desc,
968 struct sk_buff *skb)
969 {
970 struct orinoco_private *priv = ndev_priv(dev);
971 struct net_device_stats *stats = &priv->stats;
972 u16 status, fc;
973 int length;
974 struct ethhdr *hdr;
975
976 status = le16_to_cpu(desc->status);
977 length = le16_to_cpu(desc->data_len);
978 fc = le16_to_cpu(desc->frame_ctl);
979
980 /* Calculate and check MIC */
981 if (status & HERMES_RXSTAT_MIC) {
982 struct orinoco_tkip_key *key;
983 int key_id = ((status & HERMES_RXSTAT_MIC_KEY_ID) >>
984 HERMES_MIC_KEY_ID_SHIFT);
985 u8 mic[MICHAEL_MIC_LEN];
986 u8 *rxmic;
987 u8 *src = (fc & IEEE80211_FCTL_FROMDS) ?
988 desc->addr3 : desc->addr2;
989
990 /* Extract Michael MIC from payload */
991 rxmic = skb->data + skb->len - MICHAEL_MIC_LEN;
992
993 skb_trim(skb, skb->len - MICHAEL_MIC_LEN);
994 length -= MICHAEL_MIC_LEN;
995
996 key = (struct orinoco_tkip_key *) priv->keys[key_id].key;
997
998 if (!key) {
999 printk(KERN_WARNING "%s: Received encrypted frame from "
1000 "%pM using key %i, but key is not installed\n",
1001 dev->name, src, key_id);
1002 goto drop;
1003 }
1004
1005 orinoco_mic(priv->rx_tfm_mic, key->rx_mic, desc->addr1, src,
1006 0, /* priority or QoS? */
1007 skb->data, skb->len, &mic[0]);
1008
1009 if (memcmp(mic, rxmic,
1010 MICHAEL_MIC_LEN)) {
1011 union iwreq_data wrqu;
1012 struct iw_michaelmicfailure wxmic;
1013
1014 printk(KERN_WARNING "%s: "
1015 "Invalid Michael MIC in data frame from %pM, "
1016 "using key %i\n",
1017 dev->name, src, key_id);
1018
1019 /* TODO: update stats */
1020
1021 /* Notify userspace */
1022 memset(&wxmic, 0, sizeof(wxmic));
1023 wxmic.flags = key_id & IW_MICFAILURE_KEY_ID;
1024 wxmic.flags |= (desc->addr1[0] & 1) ?
1025 IW_MICFAILURE_GROUP : IW_MICFAILURE_PAIRWISE;
1026 wxmic.src_addr.sa_family = ARPHRD_ETHER;
1027 memcpy(wxmic.src_addr.sa_data, src, ETH_ALEN);
1028
1029 (void) orinoco_hw_get_tkip_iv(priv, key_id,
1030 &wxmic.tsc[0]);
1031
1032 memset(&wrqu, 0, sizeof(wrqu));
1033 wrqu.data.length = sizeof(wxmic);
1034 wireless_send_event(dev, IWEVMICHAELMICFAILURE, &wrqu,
1035 (char *) &wxmic);
1036
1037 goto drop;
1038 }
1039 }
1040
1041 /* Handle decapsulation
1042 * In most cases, the firmware tell us about SNAP frames.
1043 * For some reason, the SNAP frames sent by LinkSys APs
1044 * are not properly recognised by most firmwares.
1045 * So, check ourselves */
1046 if (length >= ENCAPS_OVERHEAD &&
1047 (((status & HERMES_RXSTAT_MSGTYPE) == HERMES_RXSTAT_1042) ||
1048 ((status & HERMES_RXSTAT_MSGTYPE) == HERMES_RXSTAT_TUNNEL) ||
1049 is_ethersnap(skb->data))) {
1050 /* These indicate a SNAP within 802.2 LLC within
1051 802.11 frame which we'll need to de-encapsulate to
1052 the original EthernetII frame. */
1053 hdr = (struct ethhdr *)skb_push(skb,
1054 ETH_HLEN - ENCAPS_OVERHEAD);
1055 } else {
1056 /* 802.3 frame - prepend 802.3 header as is */
1057 hdr = (struct ethhdr *)skb_push(skb, ETH_HLEN);
1058 hdr->h_proto = htons(length);
1059 }
1060 memcpy(hdr->h_dest, desc->addr1, ETH_ALEN);
1061 if (fc & IEEE80211_FCTL_FROMDS)
1062 memcpy(hdr->h_source, desc->addr3, ETH_ALEN);
1063 else
1064 memcpy(hdr->h_source, desc->addr2, ETH_ALEN);
1065
1066 skb->protocol = eth_type_trans(skb, dev);
1067 skb->ip_summed = CHECKSUM_NONE;
1068 if (fc & IEEE80211_FCTL_TODS)
1069 skb->pkt_type = PACKET_OTHERHOST;
1070
1071 /* Process the wireless stats if needed */
1072 orinoco_stat_gather(dev, skb, desc);
1073
1074 /* Pass the packet to the networking stack */
1075 netif_rx(skb);
1076 stats->rx_packets++;
1077 stats->rx_bytes += length;
1078
1079 return;
1080
1081 drop:
1082 dev_kfree_skb(skb);
1083 stats->rx_errors++;
1084 stats->rx_dropped++;
1085 }
1086
1087 static void orinoco_rx_isr_tasklet(unsigned long data)
1088 {
1089 struct orinoco_private *priv = (struct orinoco_private *) data;
1090 struct net_device *dev = priv->ndev;
1091 struct orinoco_rx_data *rx_data, *temp;
1092 struct hermes_rx_descriptor *desc;
1093 struct sk_buff *skb;
1094 unsigned long flags;
1095
1096 /* orinoco_rx requires the driver lock, and we also need to
1097 * protect priv->rx_list, so just hold the lock over the
1098 * lot.
1099 *
1100 * If orinoco_lock fails, we've unplugged the card. In this
1101 * case just abort. */
1102 if (orinoco_lock(priv, &flags) != 0)
1103 return;
1104
1105 /* extract desc and skb from queue */
1106 list_for_each_entry_safe(rx_data, temp, &priv->rx_list, list) {
1107 desc = rx_data->desc;
1108 skb = rx_data->skb;
1109 list_del(&rx_data->list);
1110 kfree(rx_data);
1111
1112 orinoco_rx(dev, desc, skb);
1113
1114 kfree(desc);
1115 }
1116
1117 orinoco_unlock(priv, &flags);
1118 }
1119
1120 /********************************************************************/
1121 /* Rx path (info frames) */
1122 /********************************************************************/
1123
1124 static void print_linkstatus(struct net_device *dev, u16 status)
1125 {
1126 char *s;
1127
1128 if (suppress_linkstatus)
1129 return;
1130
1131 switch (status) {
1132 case HERMES_LINKSTATUS_NOT_CONNECTED:
1133 s = "Not Connected";
1134 break;
1135 case HERMES_LINKSTATUS_CONNECTED:
1136 s = "Connected";
1137 break;
1138 case HERMES_LINKSTATUS_DISCONNECTED:
1139 s = "Disconnected";
1140 break;
1141 case HERMES_LINKSTATUS_AP_CHANGE:
1142 s = "AP Changed";
1143 break;
1144 case HERMES_LINKSTATUS_AP_OUT_OF_RANGE:
1145 s = "AP Out of Range";
1146 break;
1147 case HERMES_LINKSTATUS_AP_IN_RANGE:
1148 s = "AP In Range";
1149 break;
1150 case HERMES_LINKSTATUS_ASSOC_FAILED:
1151 s = "Association Failed";
1152 break;
1153 default:
1154 s = "UNKNOWN";
1155 }
1156
1157 printk(KERN_DEBUG "%s: New link status: %s (%04x)\n",
1158 dev->name, s, status);
1159 }
1160
1161 /* Search scan results for requested BSSID, join it if found */
1162 static void orinoco_join_ap(struct work_struct *work)
1163 {
1164 struct orinoco_private *priv =
1165 container_of(work, struct orinoco_private, join_work);
1166 struct net_device *dev = priv->ndev;
1167 struct hermes *hw = &priv->hw;
1168 int err;
1169 unsigned long flags;
1170 struct join_req {
1171 u8 bssid[ETH_ALEN];
1172 __le16 channel;
1173 } __packed req;
1174 const int atom_len = offsetof(struct prism2_scan_apinfo, atim);
1175 struct prism2_scan_apinfo *atom = NULL;
1176 int offset = 4;
1177 int found = 0;
1178 u8 *buf;
1179 u16 len;
1180
1181 /* Allocate buffer for scan results */
1182 buf = kmalloc(MAX_SCAN_LEN, GFP_KERNEL);
1183 if (!buf)
1184 return;
1185
1186 if (orinoco_lock(priv, &flags) != 0)
1187 goto fail_lock;
1188
1189 /* Sanity checks in case user changed something in the meantime */
1190 if (!priv->bssid_fixed)
1191 goto out;
1192
1193 if (strlen(priv->desired_essid) == 0)
1194 goto out;
1195
1196 /* Read scan results from the firmware */
1197 err = hw->ops->read_ltv(hw, USER_BAP,
1198 HERMES_RID_SCANRESULTSTABLE,
1199 MAX_SCAN_LEN, &len, buf);
1200 if (err) {
1201 printk(KERN_ERR "%s: Cannot read scan results\n",
1202 dev->name);
1203 goto out;
1204 }
1205
1206 len = HERMES_RECLEN_TO_BYTES(len);
1207
1208 /* Go through the scan results looking for the channel of the AP
1209 * we were requested to join */
1210 for (; offset + atom_len <= len; offset += atom_len) {
1211 atom = (struct prism2_scan_apinfo *) (buf + offset);
1212 if (memcmp(&atom->bssid, priv->desired_bssid, ETH_ALEN) == 0) {
1213 found = 1;
1214 break;
1215 }
1216 }
1217
1218 if (!found) {
1219 DEBUG(1, "%s: Requested AP not found in scan results\n",
1220 dev->name);
1221 goto out;
1222 }
1223
1224 memcpy(req.bssid, priv->desired_bssid, ETH_ALEN);
1225 req.channel = atom->channel; /* both are little-endian */
1226 err = HERMES_WRITE_RECORD(hw, USER_BAP, HERMES_RID_CNFJOINREQUEST,
1227 &req);
1228 if (err)
1229 printk(KERN_ERR "%s: Error issuing join request\n", dev->name);
1230
1231 out:
1232 orinoco_unlock(priv, &flags);
1233
1234 fail_lock:
1235 kfree(buf);
1236 }
1237
1238 /* Send new BSSID to userspace */
1239 static void orinoco_send_bssid_wevent(struct orinoco_private *priv)
1240 {
1241 struct net_device *dev = priv->ndev;
1242 struct hermes *hw = &priv->hw;
1243 union iwreq_data wrqu;
1244 int err;
1245
1246 err = hw->ops->read_ltv(hw, USER_BAP, HERMES_RID_CURRENTBSSID,
1247 ETH_ALEN, NULL, wrqu.ap_addr.sa_data);
1248 if (err != 0)
1249 return;
1250
1251 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1252
1253 /* Send event to user space */
1254 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
1255 }
1256
1257 static void orinoco_send_assocreqie_wevent(struct orinoco_private *priv)
1258 {
1259 struct net_device *dev = priv->ndev;
1260 struct hermes *hw = &priv->hw;
1261 union iwreq_data wrqu;
1262 int err;
1263 u8 buf[88];
1264 u8 *ie;
1265
1266 if (!priv->has_wpa)
1267 return;
1268
1269 err = hw->ops->read_ltv(hw, USER_BAP, HERMES_RID_CURRENT_ASSOC_REQ_INFO,
1270 sizeof(buf), NULL, &buf);
1271 if (err != 0)
1272 return;
1273
1274 ie = orinoco_get_wpa_ie(buf, sizeof(buf));
1275 if (ie) {
1276 int rem = sizeof(buf) - (ie - &buf[0]);
1277 wrqu.data.length = ie[1] + 2;
1278 if (wrqu.data.length > rem)
1279 wrqu.data.length = rem;
1280
1281 if (wrqu.data.length)
1282 /* Send event to user space */
1283 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, ie);
1284 }
1285 }
1286
1287 static void orinoco_send_assocrespie_wevent(struct orinoco_private *priv)
1288 {
1289 struct net_device *dev = priv->ndev;
1290 struct hermes *hw = &priv->hw;
1291 union iwreq_data wrqu;
1292 int err;
1293 u8 buf[88]; /* TODO: verify max size or IW_GENERIC_IE_MAX */
1294 u8 *ie;
1295
1296 if (!priv->has_wpa)
1297 return;
1298
1299 err = hw->ops->read_ltv(hw, USER_BAP,
1300 HERMES_RID_CURRENT_ASSOC_RESP_INFO,
1301 sizeof(buf), NULL, &buf);
1302 if (err != 0)
1303 return;
1304
1305 ie = orinoco_get_wpa_ie(buf, sizeof(buf));
1306 if (ie) {
1307 int rem = sizeof(buf) - (ie - &buf[0]);
1308 wrqu.data.length = ie[1] + 2;
1309 if (wrqu.data.length > rem)
1310 wrqu.data.length = rem;
1311
1312 if (wrqu.data.length)
1313 /* Send event to user space */
1314 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, ie);
1315 }
1316 }
1317
1318 static void orinoco_send_wevents(struct work_struct *work)
1319 {
1320 struct orinoco_private *priv =
1321 container_of(work, struct orinoco_private, wevent_work);
1322 unsigned long flags;
1323
1324 if (orinoco_lock(priv, &flags) != 0)
1325 return;
1326
1327 orinoco_send_assocreqie_wevent(priv);
1328 orinoco_send_assocrespie_wevent(priv);
1329 orinoco_send_bssid_wevent(priv);
1330
1331 orinoco_unlock(priv, &flags);
1332 }
1333
1334 static void qbuf_scan(struct orinoco_private *priv, void *buf,
1335 int len, int type)
1336 {
1337 struct orinoco_scan_data *sd;
1338 unsigned long flags;
1339
1340 sd = kmalloc(sizeof(*sd), GFP_ATOMIC);
1341 sd->buf = buf;
1342 sd->len = len;
1343 sd->type = type;
1344
1345 spin_lock_irqsave(&priv->scan_lock, flags);
1346 list_add_tail(&sd->list, &priv->scan_list);
1347 spin_unlock_irqrestore(&priv->scan_lock, flags);
1348
1349 schedule_work(&priv->process_scan);
1350 }
1351
1352 static void qabort_scan(struct orinoco_private *priv)
1353 {
1354 struct orinoco_scan_data *sd;
1355 unsigned long flags;
1356
1357 sd = kmalloc(sizeof(*sd), GFP_ATOMIC);
1358 sd->len = -1; /* Abort */
1359
1360 spin_lock_irqsave(&priv->scan_lock, flags);
1361 list_add_tail(&sd->list, &priv->scan_list);
1362 spin_unlock_irqrestore(&priv->scan_lock, flags);
1363
1364 schedule_work(&priv->process_scan);
1365 }
1366
1367 static void orinoco_process_scan_results(struct work_struct *work)
1368 {
1369 struct orinoco_private *priv =
1370 container_of(work, struct orinoco_private, process_scan);
1371 struct orinoco_scan_data *sd, *temp;
1372 unsigned long flags;
1373 void *buf;
1374 int len;
1375 int type;
1376
1377 spin_lock_irqsave(&priv->scan_lock, flags);
1378 list_for_each_entry_safe(sd, temp, &priv->scan_list, list) {
1379
1380 buf = sd->buf;
1381 len = sd->len;
1382 type = sd->type;
1383
1384 list_del(&sd->list);
1385 spin_unlock_irqrestore(&priv->scan_lock, flags);
1386 kfree(sd);
1387
1388 if (len > 0) {
1389 if (type == HERMES_INQ_CHANNELINFO)
1390 orinoco_add_extscan_result(priv, buf, len);
1391 else
1392 orinoco_add_hostscan_results(priv, buf, len);
1393
1394 kfree(buf);
1395 } else {
1396 /* Either abort or complete the scan */
1397 orinoco_scan_done(priv, (len < 0));
1398 }
1399
1400 spin_lock_irqsave(&priv->scan_lock, flags);
1401 }
1402 spin_unlock_irqrestore(&priv->scan_lock, flags);
1403 }
1404
1405 void __orinoco_ev_info(struct net_device *dev, struct hermes *hw)
1406 {
1407 struct orinoco_private *priv = ndev_priv(dev);
1408 u16 infofid;
1409 struct {
1410 __le16 len;
1411 __le16 type;
1412 } __packed info;
1413 int len, type;
1414 int err;
1415
1416 /* This is an answer to an INQUIRE command that we did earlier,
1417 * or an information "event" generated by the card
1418 * The controller return to us a pseudo frame containing
1419 * the information in question - Jean II */
1420 infofid = hermes_read_regn(hw, INFOFID);
1421
1422 /* Read the info frame header - don't try too hard */
1423 err = hw->ops->bap_pread(hw, IRQ_BAP, &info, sizeof(info),
1424 infofid, 0);
1425 if (err) {
1426 printk(KERN_ERR "%s: error %d reading info frame. "
1427 "Frame dropped.\n", dev->name, err);
1428 return;
1429 }
1430
1431 len = HERMES_RECLEN_TO_BYTES(le16_to_cpu(info.len));
1432 type = le16_to_cpu(info.type);
1433
1434 switch (type) {
1435 case HERMES_INQ_TALLIES: {
1436 struct hermes_tallies_frame tallies;
1437 struct iw_statistics *wstats = &priv->wstats;
1438
1439 if (len > sizeof(tallies)) {
1440 printk(KERN_WARNING "%s: Tallies frame too long (%d bytes)\n",
1441 dev->name, len);
1442 len = sizeof(tallies);
1443 }
1444
1445 err = hw->ops->bap_pread(hw, IRQ_BAP, &tallies, len,
1446 infofid, sizeof(info));
1447 if (err)
1448 break;
1449
1450 /* Increment our various counters */
1451 /* wstats->discard.nwid - no wrong BSSID stuff */
1452 wstats->discard.code +=
1453 le16_to_cpu(tallies.RxWEPUndecryptable);
1454 if (len == sizeof(tallies))
1455 wstats->discard.code +=
1456 le16_to_cpu(tallies.RxDiscards_WEPICVError) +
1457 le16_to_cpu(tallies.RxDiscards_WEPExcluded);
1458 wstats->discard.misc +=
1459 le16_to_cpu(tallies.TxDiscardsWrongSA);
1460 wstats->discard.fragment +=
1461 le16_to_cpu(tallies.RxMsgInBadMsgFragments);
1462 wstats->discard.retries +=
1463 le16_to_cpu(tallies.TxRetryLimitExceeded);
1464 /* wstats->miss.beacon - no match */
1465 }
1466 break;
1467 case HERMES_INQ_LINKSTATUS: {
1468 struct hermes_linkstatus linkstatus;
1469 u16 newstatus;
1470 int connected;
1471
1472 if (priv->iw_mode == NL80211_IFTYPE_MONITOR)
1473 break;
1474
1475 if (len != sizeof(linkstatus)) {
1476 printk(KERN_WARNING "%s: Unexpected size for linkstatus frame (%d bytes)\n",
1477 dev->name, len);
1478 break;
1479 }
1480
1481 err = hw->ops->bap_pread(hw, IRQ_BAP, &linkstatus, len,
1482 infofid, sizeof(info));
1483 if (err)
1484 break;
1485 newstatus = le16_to_cpu(linkstatus.linkstatus);
1486
1487 /* Symbol firmware uses "out of range" to signal that
1488 * the hostscan frame can be requested. */
1489 if (newstatus == HERMES_LINKSTATUS_AP_OUT_OF_RANGE &&
1490 priv->firmware_type == FIRMWARE_TYPE_SYMBOL &&
1491 priv->has_hostscan && priv->scan_request) {
1492 hermes_inquire(hw, HERMES_INQ_HOSTSCAN_SYMBOL);
1493 break;
1494 }
1495
1496 connected = (newstatus == HERMES_LINKSTATUS_CONNECTED)
1497 || (newstatus == HERMES_LINKSTATUS_AP_CHANGE)
1498 || (newstatus == HERMES_LINKSTATUS_AP_IN_RANGE);
1499
1500 if (connected)
1501 netif_carrier_on(dev);
1502 else if (!ignore_disconnect)
1503 netif_carrier_off(dev);
1504
1505 if (newstatus != priv->last_linkstatus) {
1506 priv->last_linkstatus = newstatus;
1507 print_linkstatus(dev, newstatus);
1508 /* The info frame contains only one word which is the
1509 * status (see hermes.h). The status is pretty boring
1510 * in itself, that's why we export the new BSSID...
1511 * Jean II */
1512 schedule_work(&priv->wevent_work);
1513 }
1514 }
1515 break;
1516 case HERMES_INQ_SCAN:
1517 if (!priv->scan_request && priv->bssid_fixed &&
1518 priv->firmware_type == FIRMWARE_TYPE_INTERSIL) {
1519 schedule_work(&priv->join_work);
1520 break;
1521 }
1522 /* fall through */
1523 case HERMES_INQ_HOSTSCAN:
1524 case HERMES_INQ_HOSTSCAN_SYMBOL: {
1525 /* Result of a scanning. Contains information about
1526 * cells in the vicinity - Jean II */
1527 unsigned char *buf;
1528
1529 /* Sanity check */
1530 if (len > 4096) {
1531 printk(KERN_WARNING "%s: Scan results too large (%d bytes)\n",
1532 dev->name, len);
1533 qabort_scan(priv);
1534 break;
1535 }
1536
1537 /* Allocate buffer for results */
1538 buf = kmalloc(len, GFP_ATOMIC);
1539 if (buf == NULL) {
1540 /* No memory, so can't printk()... */
1541 qabort_scan(priv);
1542 break;
1543 }
1544
1545 /* Read scan data */
1546 err = hw->ops->bap_pread(hw, IRQ_BAP, (void *) buf, len,
1547 infofid, sizeof(info));
1548 if (err) {
1549 kfree(buf);
1550 qabort_scan(priv);
1551 break;
1552 }
1553
1554 #ifdef ORINOCO_DEBUG
1555 {
1556 int i;
1557 printk(KERN_DEBUG "Scan result [%02X", buf[0]);
1558 for (i = 1; i < (len * 2); i++)
1559 printk(":%02X", buf[i]);
1560 printk("]\n");
1561 }
1562 #endif /* ORINOCO_DEBUG */
1563
1564 qbuf_scan(priv, buf, len, type);
1565 }
1566 break;
1567 case HERMES_INQ_CHANNELINFO:
1568 {
1569 struct agere_ext_scan_info *bss;
1570
1571 if (!priv->scan_request) {
1572 printk(KERN_DEBUG "%s: Got chaninfo without scan, "
1573 "len=%d\n", dev->name, len);
1574 break;
1575 }
1576
1577 /* An empty result indicates that the scan is complete */
1578 if (len == 0) {
1579 qbuf_scan(priv, NULL, len, type);
1580 break;
1581 }
1582
1583 /* Sanity check */
1584 else if (len < (offsetof(struct agere_ext_scan_info,
1585 data) + 2)) {
1586 /* Drop this result now so we don't have to
1587 * keep checking later */
1588 printk(KERN_WARNING
1589 "%s: Ext scan results too short (%d bytes)\n",
1590 dev->name, len);
1591 break;
1592 }
1593
1594 bss = kmalloc(len, GFP_ATOMIC);
1595 if (bss == NULL)
1596 break;
1597
1598 /* Read scan data */
1599 err = hw->ops->bap_pread(hw, IRQ_BAP, (void *) bss, len,
1600 infofid, sizeof(info));
1601 if (err)
1602 kfree(bss);
1603 else
1604 qbuf_scan(priv, bss, len, type);
1605
1606 break;
1607 }
1608 case HERMES_INQ_SEC_STAT_AGERE:
1609 /* Security status (Agere specific) */
1610 /* Ignore this frame for now */
1611 if (priv->firmware_type == FIRMWARE_TYPE_AGERE)
1612 break;
1613 /* fall through */
1614 default:
1615 printk(KERN_DEBUG "%s: Unknown information frame received: "
1616 "type 0x%04x, length %d\n", dev->name, type, len);
1617 /* We don't actually do anything about it */
1618 break;
1619 }
1620 }
1621 EXPORT_SYMBOL(__orinoco_ev_info);
1622
1623 static void __orinoco_ev_infdrop(struct net_device *dev, struct hermes *hw)
1624 {
1625 if (net_ratelimit())
1626 printk(KERN_DEBUG "%s: Information frame lost.\n", dev->name);
1627 }
1628
1629 /********************************************************************/
1630 /* Internal hardware control routines */
1631 /********************************************************************/
1632
1633 static int __orinoco_up(struct orinoco_private *priv)
1634 {
1635 struct net_device *dev = priv->ndev;
1636 struct hermes *hw = &priv->hw;
1637 int err;
1638
1639 netif_carrier_off(dev); /* just to make sure */
1640
1641 err = __orinoco_commit(priv);
1642 if (err) {
1643 printk(KERN_ERR "%s: Error %d configuring card\n",
1644 dev->name, err);
1645 return err;
1646 }
1647
1648 /* Fire things up again */
1649 hermes_set_irqmask(hw, ORINOCO_INTEN);
1650 err = hermes_enable_port(hw, 0);
1651 if (err) {
1652 printk(KERN_ERR "%s: Error %d enabling MAC port\n",
1653 dev->name, err);
1654 return err;
1655 }
1656
1657 netif_start_queue(dev);
1658
1659 return 0;
1660 }
1661
1662 static int __orinoco_down(struct orinoco_private *priv)
1663 {
1664 struct net_device *dev = priv->ndev;
1665 struct hermes *hw = &priv->hw;
1666 int err;
1667
1668 netif_stop_queue(dev);
1669
1670 if (!priv->hw_unavailable) {
1671 if (!priv->broken_disableport) {
1672 err = hermes_disable_port(hw, 0);
1673 if (err) {
1674 /* Some firmwares (e.g. Intersil 1.3.x) seem
1675 * to have problems disabling the port, oh
1676 * well, too bad. */
1677 printk(KERN_WARNING "%s: Error %d disabling MAC port\n",
1678 dev->name, err);
1679 priv->broken_disableport = 1;
1680 }
1681 }
1682 hermes_set_irqmask(hw, 0);
1683 hermes_write_regn(hw, EVACK, 0xffff);
1684 }
1685
1686 orinoco_scan_done(priv, true);
1687
1688 /* firmware will have to reassociate */
1689 netif_carrier_off(dev);
1690 priv->last_linkstatus = 0xffff;
1691
1692 return 0;
1693 }
1694
1695 static int orinoco_reinit_firmware(struct orinoco_private *priv)
1696 {
1697 struct hermes *hw = &priv->hw;
1698 int err;
1699
1700 err = hw->ops->init(hw);
1701 if (priv->do_fw_download && !err) {
1702 err = orinoco_download(priv);
1703 if (err)
1704 priv->do_fw_download = 0;
1705 }
1706 if (!err)
1707 err = orinoco_hw_allocate_fid(priv);
1708
1709 return err;
1710 }
1711
1712 static int
1713 __orinoco_set_multicast_list(struct net_device *dev)
1714 {
1715 struct orinoco_private *priv = ndev_priv(dev);
1716 int err = 0;
1717 int promisc, mc_count;
1718
1719 /* The Hermes doesn't seem to have an allmulti mode, so we go
1720 * into promiscuous mode and let the upper levels deal. */
1721 if ((dev->flags & IFF_PROMISC) || (dev->flags & IFF_ALLMULTI) ||
1722 (netdev_mc_count(dev) > MAX_MULTICAST(priv))) {
1723 promisc = 1;
1724 mc_count = 0;
1725 } else {
1726 promisc = 0;
1727 mc_count = netdev_mc_count(dev);
1728 }
1729
1730 err = __orinoco_hw_set_multicast_list(priv, dev, mc_count, promisc);
1731
1732 return err;
1733 }
1734
1735 /* This must be called from user context, without locks held - use
1736 * schedule_work() */
1737 void orinoco_reset(struct work_struct *work)
1738 {
1739 struct orinoco_private *priv =
1740 container_of(work, struct orinoco_private, reset_work);
1741 struct net_device *dev = priv->ndev;
1742 struct hermes *hw = &priv->hw;
1743 int err;
1744 unsigned long flags;
1745
1746 if (orinoco_lock(priv, &flags) != 0)
1747 /* When the hardware becomes available again, whatever
1748 * detects that is responsible for re-initializing
1749 * it. So no need for anything further */
1750 return;
1751
1752 netif_stop_queue(dev);
1753
1754 /* Shut off interrupts. Depending on what state the hardware
1755 * is in, this might not work, but we'll try anyway */
1756 hermes_set_irqmask(hw, 0);
1757 hermes_write_regn(hw, EVACK, 0xffff);
1758
1759 priv->hw_unavailable++;
1760 priv->last_linkstatus = 0xffff; /* firmware will have to reassociate */
1761 netif_carrier_off(dev);
1762
1763 orinoco_unlock(priv, &flags);
1764
1765 /* Scanning support: Notify scan cancellation */
1766 orinoco_scan_done(priv, true);
1767
1768 if (priv->hard_reset) {
1769 err = (*priv->hard_reset)(priv);
1770 if (err) {
1771 printk(KERN_ERR "%s: orinoco_reset: Error %d "
1772 "performing hard reset\n", dev->name, err);
1773 goto disable;
1774 }
1775 }
1776
1777 err = orinoco_reinit_firmware(priv);
1778 if (err) {
1779 printk(KERN_ERR "%s: orinoco_reset: Error %d re-initializing firmware\n",
1780 dev->name, err);
1781 goto disable;
1782 }
1783
1784 /* This has to be called from user context */
1785 orinoco_lock_irq(priv);
1786
1787 priv->hw_unavailable--;
1788
1789 /* priv->open or priv->hw_unavailable might have changed while
1790 * we dropped the lock */
1791 if (priv->open && (!priv->hw_unavailable)) {
1792 err = __orinoco_up(priv);
1793 if (err) {
1794 printk(KERN_ERR "%s: orinoco_reset: Error %d reenabling card\n",
1795 dev->name, err);
1796 } else
1797 dev->trans_start = jiffies;
1798 }
1799
1800 orinoco_unlock_irq(priv);
1801
1802 return;
1803 disable:
1804 hermes_set_irqmask(hw, 0);
1805 netif_device_detach(dev);
1806 printk(KERN_ERR "%s: Device has been disabled!\n", dev->name);
1807 }
1808
1809 static int __orinoco_commit(struct orinoco_private *priv)
1810 {
1811 struct net_device *dev = priv->ndev;
1812 int err = 0;
1813
1814 /* If we've called commit, we are reconfiguring or bringing the
1815 * interface up. Maintaining countermeasures across this would
1816 * be confusing, so note that we've disabled them. The port will
1817 * be enabled later in orinoco_commit or __orinoco_up. */
1818 priv->tkip_cm_active = 0;
1819
1820 err = orinoco_hw_program_rids(priv);
1821
1822 /* FIXME: what about netif_tx_lock */
1823 (void) __orinoco_set_multicast_list(dev);
1824
1825 return err;
1826 }
1827
1828 /* Ensures configuration changes are applied. May result in a reset.
1829 * The caller should hold priv->lock
1830 */
1831 int orinoco_commit(struct orinoco_private *priv)
1832 {
1833 struct net_device *dev = priv->ndev;
1834 struct hermes *hw = &priv->hw;
1835 int err;
1836
1837 if (priv->broken_disableport) {
1838 schedule_work(&priv->reset_work);
1839 return 0;
1840 }
1841
1842 err = hermes_disable_port(hw, 0);
1843 if (err) {
1844 printk(KERN_WARNING "%s: Unable to disable port "
1845 "while reconfiguring card\n", dev->name);
1846 priv->broken_disableport = 1;
1847 goto out;
1848 }
1849
1850 err = __orinoco_commit(priv);
1851 if (err) {
1852 printk(KERN_WARNING "%s: Unable to reconfigure card\n",
1853 dev->name);
1854 goto out;
1855 }
1856
1857 err = hermes_enable_port(hw, 0);
1858 if (err) {
1859 printk(KERN_WARNING "%s: Unable to enable port while reconfiguring card\n",
1860 dev->name);
1861 goto out;
1862 }
1863
1864 out:
1865 if (err) {
1866 printk(KERN_WARNING "%s: Resetting instead...\n", dev->name);
1867 schedule_work(&priv->reset_work);
1868 err = 0;
1869 }
1870 return err;
1871 }
1872
1873 /********************************************************************/
1874 /* Interrupt handler */
1875 /********************************************************************/
1876
1877 static void __orinoco_ev_tick(struct net_device *dev, struct hermes *hw)
1878 {
1879 printk(KERN_DEBUG "%s: TICK\n", dev->name);
1880 }
1881
1882 static void __orinoco_ev_wterr(struct net_device *dev, struct hermes *hw)
1883 {
1884 /* This seems to happen a fair bit under load, but ignoring it
1885 seems to work fine...*/
1886 printk(KERN_DEBUG "%s: MAC controller error (WTERR). Ignoring.\n",
1887 dev->name);
1888 }
1889
1890 irqreturn_t orinoco_interrupt(int irq, void *dev_id)
1891 {
1892 struct orinoco_private *priv = dev_id;
1893 struct net_device *dev = priv->ndev;
1894 struct hermes *hw = &priv->hw;
1895 int count = MAX_IRQLOOPS_PER_IRQ;
1896 u16 evstat, events;
1897 /* These are used to detect a runaway interrupt situation.
1898 *
1899 * If we get more than MAX_IRQLOOPS_PER_JIFFY iterations in a jiffy,
1900 * we panic and shut down the hardware
1901 */
1902 /* jiffies value the last time we were called */
1903 static int last_irq_jiffy; /* = 0 */
1904 static int loops_this_jiffy; /* = 0 */
1905 unsigned long flags;
1906
1907 if (orinoco_lock(priv, &flags) != 0) {
1908 /* If hw is unavailable - we don't know if the irq was
1909 * for us or not */
1910 return IRQ_HANDLED;
1911 }
1912
1913 evstat = hermes_read_regn(hw, EVSTAT);
1914 events = evstat & hw->inten;
1915 if (!events) {
1916 orinoco_unlock(priv, &flags);
1917 return IRQ_NONE;
1918 }
1919
1920 if (jiffies != last_irq_jiffy)
1921 loops_this_jiffy = 0;
1922 last_irq_jiffy = jiffies;
1923
1924 while (events && count--) {
1925 if (++loops_this_jiffy > MAX_IRQLOOPS_PER_JIFFY) {
1926 printk(KERN_WARNING "%s: IRQ handler is looping too "
1927 "much! Resetting.\n", dev->name);
1928 /* Disable interrupts for now */
1929 hermes_set_irqmask(hw, 0);
1930 schedule_work(&priv->reset_work);
1931 break;
1932 }
1933
1934 /* Check the card hasn't been removed */
1935 if (!hermes_present(hw)) {
1936 DEBUG(0, "orinoco_interrupt(): card removed\n");
1937 break;
1938 }
1939
1940 if (events & HERMES_EV_TICK)
1941 __orinoco_ev_tick(dev, hw);
1942 if (events & HERMES_EV_WTERR)
1943 __orinoco_ev_wterr(dev, hw);
1944 if (events & HERMES_EV_INFDROP)
1945 __orinoco_ev_infdrop(dev, hw);
1946 if (events & HERMES_EV_INFO)
1947 __orinoco_ev_info(dev, hw);
1948 if (events & HERMES_EV_RX)
1949 __orinoco_ev_rx(dev, hw);
1950 if (events & HERMES_EV_TXEXC)
1951 __orinoco_ev_txexc(dev, hw);
1952 if (events & HERMES_EV_TX)
1953 __orinoco_ev_tx(dev, hw);
1954 if (events & HERMES_EV_ALLOC)
1955 __orinoco_ev_alloc(dev, hw);
1956
1957 hermes_write_regn(hw, EVACK, evstat);
1958
1959 evstat = hermes_read_regn(hw, EVSTAT);
1960 events = evstat & hw->inten;
1961 }
1962
1963 orinoco_unlock(priv, &flags);
1964 return IRQ_HANDLED;
1965 }
1966 EXPORT_SYMBOL(orinoco_interrupt);
1967
1968 /********************************************************************/
1969 /* Power management */
1970 /********************************************************************/
1971 #if defined(CONFIG_PM_SLEEP) && !defined(CONFIG_HERMES_CACHE_FW_ON_INIT)
1972 static int orinoco_pm_notifier(struct notifier_block *notifier,
1973 unsigned long pm_event,
1974 void *unused)
1975 {
1976 struct orinoco_private *priv = container_of(notifier,
1977 struct orinoco_private,
1978 pm_notifier);
1979
1980 /* All we need to do is cache the firmware before suspend, and
1981 * release it when we come out.
1982 *
1983 * Only need to do this if we're downloading firmware. */
1984 if (!priv->do_fw_download)
1985 return NOTIFY_DONE;
1986
1987 switch (pm_event) {
1988 case PM_HIBERNATION_PREPARE:
1989 case PM_SUSPEND_PREPARE:
1990 orinoco_cache_fw(priv, 0);
1991 break;
1992
1993 case PM_POST_RESTORE:
1994 /* Restore from hibernation failed. We need to clean
1995 * up in exactly the same way, so fall through. */
1996 case PM_POST_HIBERNATION:
1997 case PM_POST_SUSPEND:
1998 orinoco_uncache_fw(priv);
1999 break;
2000
2001 case PM_RESTORE_PREPARE:
2002 default:
2003 break;
2004 }
2005
2006 return NOTIFY_DONE;
2007 }
2008
2009 static void orinoco_register_pm_notifier(struct orinoco_private *priv)
2010 {
2011 priv->pm_notifier.notifier_call = orinoco_pm_notifier;
2012 register_pm_notifier(&priv->pm_notifier);
2013 }
2014
2015 static void orinoco_unregister_pm_notifier(struct orinoco_private *priv)
2016 {
2017 unregister_pm_notifier(&priv->pm_notifier);
2018 }
2019 #else /* !PM_SLEEP || HERMES_CACHE_FW_ON_INIT */
2020 #define orinoco_register_pm_notifier(priv) do { } while (0)
2021 #define orinoco_unregister_pm_notifier(priv) do { } while (0)
2022 #endif
2023
2024 /********************************************************************/
2025 /* Initialization */
2026 /********************************************************************/
2027
2028 int orinoco_init(struct orinoco_private *priv)
2029 {
2030 struct device *dev = priv->dev;
2031 struct wiphy *wiphy = priv_to_wiphy(priv);
2032 struct hermes *hw = &priv->hw;
2033 int err = 0;
2034
2035 /* No need to lock, the hw_unavailable flag is already set in
2036 * alloc_orinocodev() */
2037 priv->nicbuf_size = IEEE80211_MAX_FRAME_LEN + ETH_HLEN;
2038
2039 /* Initialize the firmware */
2040 err = hw->ops->init(hw);
2041 if (err != 0) {
2042 dev_err(dev, "Failed to initialize firmware (err = %d)\n",
2043 err);
2044 goto out;
2045 }
2046
2047 err = determine_fw_capabilities(priv, wiphy->fw_version,
2048 sizeof(wiphy->fw_version),
2049 &wiphy->hw_version);
2050 if (err != 0) {
2051 dev_err(dev, "Incompatible firmware, aborting\n");
2052 goto out;
2053 }
2054
2055 if (priv->do_fw_download) {
2056 #ifdef CONFIG_HERMES_CACHE_FW_ON_INIT
2057 orinoco_cache_fw(priv, 0);
2058 #endif
2059
2060 err = orinoco_download(priv);
2061 if (err)
2062 priv->do_fw_download = 0;
2063
2064 /* Check firmware version again */
2065 err = determine_fw_capabilities(priv, wiphy->fw_version,
2066 sizeof(wiphy->fw_version),
2067 &wiphy->hw_version);
2068 if (err != 0) {
2069 dev_err(dev, "Incompatible firmware, aborting\n");
2070 goto out;
2071 }
2072 }
2073
2074 if (priv->has_port3)
2075 dev_info(dev, "Ad-hoc demo mode supported\n");
2076 if (priv->has_ibss)
2077 dev_info(dev, "IEEE standard IBSS ad-hoc mode supported\n");
2078 if (priv->has_wep)
2079 dev_info(dev, "WEP supported, %s-bit key\n",
2080 priv->has_big_wep ? "104" : "40");
2081 if (priv->has_wpa) {
2082 dev_info(dev, "WPA-PSK supported\n");
2083 if (orinoco_mic_init(priv)) {
2084 dev_err(dev, "Failed to setup MIC crypto algorithm. "
2085 "Disabling WPA support\n");
2086 priv->has_wpa = 0;
2087 }
2088 }
2089
2090 err = orinoco_hw_read_card_settings(priv, wiphy->perm_addr);
2091 if (err)
2092 goto out;
2093
2094 err = orinoco_hw_allocate_fid(priv);
2095 if (err) {
2096 dev_err(dev, "Failed to allocate NIC buffer!\n");
2097 goto out;
2098 }
2099
2100 /* Set up the default configuration */
2101 priv->iw_mode = NL80211_IFTYPE_STATION;
2102 /* By default use IEEE/IBSS ad-hoc mode if we have it */
2103 priv->prefer_port3 = priv->has_port3 && (!priv->has_ibss);
2104 set_port_type(priv);
2105 priv->channel = 0; /* use firmware default */
2106
2107 priv->promiscuous = 0;
2108 priv->encode_alg = ORINOCO_ALG_NONE;
2109 priv->tx_key = 0;
2110 priv->wpa_enabled = 0;
2111 priv->tkip_cm_active = 0;
2112 priv->key_mgmt = 0;
2113 priv->wpa_ie_len = 0;
2114 priv->wpa_ie = NULL;
2115
2116 if (orinoco_wiphy_register(wiphy)) {
2117 err = -ENODEV;
2118 goto out;
2119 }
2120
2121 /* Make the hardware available, as long as it hasn't been
2122 * removed elsewhere (e.g. by PCMCIA hot unplug) */
2123 orinoco_lock_irq(priv);
2124 priv->hw_unavailable--;
2125 orinoco_unlock_irq(priv);
2126
2127 dev_dbg(dev, "Ready\n");
2128
2129 out:
2130 return err;
2131 }
2132 EXPORT_SYMBOL(orinoco_init);
2133
2134 static const struct net_device_ops orinoco_netdev_ops = {
2135 .ndo_open = orinoco_open,
2136 .ndo_stop = orinoco_stop,
2137 .ndo_start_xmit = orinoco_xmit,
2138 .ndo_set_rx_mode = orinoco_set_multicast_list,
2139 .ndo_change_mtu = orinoco_change_mtu,
2140 .ndo_set_mac_address = eth_mac_addr,
2141 .ndo_validate_addr = eth_validate_addr,
2142 .ndo_tx_timeout = orinoco_tx_timeout,
2143 .ndo_get_stats = orinoco_get_stats,
2144 };
2145
2146 /* Allocate private data.
2147 *
2148 * This driver has a number of structures associated with it
2149 * netdev - Net device structure for each network interface
2150 * wiphy - structure associated with wireless phy
2151 * wireless_dev (wdev) - structure for each wireless interface
2152 * hw - structure for hermes chip info
2153 * card - card specific structure for use by the card driver
2154 * (airport, orinoco_cs)
2155 * priv - orinoco private data
2156 * device - generic linux device structure
2157 *
2158 * +---------+ +---------+
2159 * | wiphy | | netdev |
2160 * | +-------+ | +-------+
2161 * | | priv | | | wdev |
2162 * | | +-----+ +-+-------+
2163 * | | | hw |
2164 * | +-+-----+
2165 * | | card |
2166 * +-+-------+
2167 *
2168 * priv has a link to netdev and device
2169 * wdev has a link to wiphy
2170 */
2171 struct orinoco_private
2172 *alloc_orinocodev(int sizeof_card,
2173 struct device *device,
2174 int (*hard_reset)(struct orinoco_private *),
2175 int (*stop_fw)(struct orinoco_private *, int))
2176 {
2177 struct orinoco_private *priv;
2178 struct wiphy *wiphy;
2179
2180 /* allocate wiphy
2181 * NOTE: We only support a single virtual interface
2182 * but this may change when monitor mode is added
2183 */
2184 wiphy = wiphy_new(&orinoco_cfg_ops,
2185 sizeof(struct orinoco_private) + sizeof_card);
2186 if (!wiphy)
2187 return NULL;
2188
2189 priv = wiphy_priv(wiphy);
2190 priv->dev = device;
2191
2192 if (sizeof_card)
2193 priv->card = (void *)((unsigned long)priv
2194 + sizeof(struct orinoco_private));
2195 else
2196 priv->card = NULL;
2197
2198 orinoco_wiphy_init(wiphy);
2199
2200 #ifdef WIRELESS_SPY
2201 priv->wireless_data.spy_data = &priv->spy_data;
2202 #endif
2203
2204 /* Set up default callbacks */
2205 priv->hard_reset = hard_reset;
2206 priv->stop_fw = stop_fw;
2207
2208 spin_lock_init(&priv->lock);
2209 priv->open = 0;
2210 priv->hw_unavailable = 1; /* orinoco_init() must clear this
2211 * before anything else touches the
2212 * hardware */
2213 INIT_WORK(&priv->reset_work, orinoco_reset);
2214 INIT_WORK(&priv->join_work, orinoco_join_ap);
2215 INIT_WORK(&priv->wevent_work, orinoco_send_wevents);
2216
2217 INIT_LIST_HEAD(&priv->rx_list);
2218 tasklet_init(&priv->rx_tasklet, orinoco_rx_isr_tasklet,
2219 (unsigned long) priv);
2220
2221 spin_lock_init(&priv->scan_lock);
2222 INIT_LIST_HEAD(&priv->scan_list);
2223 INIT_WORK(&priv->process_scan, orinoco_process_scan_results);
2224
2225 priv->last_linkstatus = 0xffff;
2226
2227 #if defined(CONFIG_HERMES_CACHE_FW_ON_INIT) || defined(CONFIG_PM_SLEEP)
2228 priv->cached_pri_fw = NULL;
2229 priv->cached_fw = NULL;
2230 #endif
2231
2232 /* Register PM notifiers */
2233 orinoco_register_pm_notifier(priv);
2234
2235 return priv;
2236 }
2237 EXPORT_SYMBOL(alloc_orinocodev);
2238
2239 /* We can only support a single interface. We provide a separate
2240 * function to set it up to distinguish between hardware
2241 * initialisation and interface setup.
2242 *
2243 * The base_addr and irq parameters are passed on to netdev for use
2244 * with SIOCGIFMAP.
2245 */
2246 int orinoco_if_add(struct orinoco_private *priv,
2247 unsigned long base_addr,
2248 unsigned int irq,
2249 const struct net_device_ops *ops)
2250 {
2251 struct wiphy *wiphy = priv_to_wiphy(priv);
2252 struct wireless_dev *wdev;
2253 struct net_device *dev;
2254 int ret;
2255
2256 dev = alloc_etherdev(sizeof(struct wireless_dev));
2257
2258 if (!dev)
2259 return -ENOMEM;
2260
2261 /* Initialise wireless_dev */
2262 wdev = netdev_priv(dev);
2263 wdev->wiphy = wiphy;
2264 wdev->iftype = NL80211_IFTYPE_STATION;
2265
2266 /* Setup / override net_device fields */
2267 dev->ieee80211_ptr = wdev;
2268 dev->watchdog_timeo = HZ; /* 1 second timeout */
2269 dev->wireless_handlers = &orinoco_handler_def;
2270 #ifdef WIRELESS_SPY
2271 dev->wireless_data = &priv->wireless_data;
2272 #endif
2273 /* Default to standard ops if not set */
2274 if (ops)
2275 dev->netdev_ops = ops;
2276 else
2277 dev->netdev_ops = &orinoco_netdev_ops;
2278
2279 /* we use the default eth_mac_addr for setting the MAC addr */
2280
2281 /* Reserve space in skb for the SNAP header */
2282 dev->needed_headroom = ENCAPS_OVERHEAD;
2283
2284 netif_carrier_off(dev);
2285
2286 memcpy(dev->dev_addr, wiphy->perm_addr, ETH_ALEN);
2287 memcpy(dev->perm_addr, wiphy->perm_addr, ETH_ALEN);
2288
2289 dev->base_addr = base_addr;
2290 dev->irq = irq;
2291
2292 SET_NETDEV_DEV(dev, priv->dev);
2293 ret = register_netdev(dev);
2294 if (ret)
2295 goto fail;
2296
2297 priv->ndev = dev;
2298
2299 /* Report what we've done */
2300 dev_dbg(priv->dev, "Registerred interface %s.\n", dev->name);
2301
2302 return 0;
2303
2304 fail:
2305 free_netdev(dev);
2306 return ret;
2307 }
2308 EXPORT_SYMBOL(orinoco_if_add);
2309
2310 void orinoco_if_del(struct orinoco_private *priv)
2311 {
2312 struct net_device *dev = priv->ndev;
2313
2314 unregister_netdev(dev);
2315 free_netdev(dev);
2316 }
2317 EXPORT_SYMBOL(orinoco_if_del);
2318
2319 void free_orinocodev(struct orinoco_private *priv)
2320 {
2321 struct wiphy *wiphy = priv_to_wiphy(priv);
2322 struct orinoco_rx_data *rx_data, *temp;
2323 struct orinoco_scan_data *sd, *sdtemp;
2324
2325 wiphy_unregister(wiphy);
2326
2327 /* If the tasklet is scheduled when we call tasklet_kill it
2328 * will run one final time. However the tasklet will only
2329 * drain priv->rx_list if the hw is still available. */
2330 tasklet_kill(&priv->rx_tasklet);
2331
2332 /* Explicitly drain priv->rx_list */
2333 list_for_each_entry_safe(rx_data, temp, &priv->rx_list, list) {
2334 list_del(&rx_data->list);
2335
2336 dev_kfree_skb(rx_data->skb);
2337 kfree(rx_data->desc);
2338 kfree(rx_data);
2339 }
2340
2341 cancel_work_sync(&priv->process_scan);
2342 /* Explicitly drain priv->scan_list */
2343 list_for_each_entry_safe(sd, sdtemp, &priv->scan_list, list) {
2344 list_del(&sd->list);
2345
2346 if ((sd->len > 0) && sd->buf)
2347 kfree(sd->buf);
2348 kfree(sd);
2349 }
2350
2351 orinoco_unregister_pm_notifier(priv);
2352 orinoco_uncache_fw(priv);
2353
2354 priv->wpa_ie_len = 0;
2355 kfree(priv->wpa_ie);
2356 orinoco_mic_free(priv);
2357 wiphy_free(wiphy);
2358 }
2359 EXPORT_SYMBOL(free_orinocodev);
2360
2361 int orinoco_up(struct orinoco_private *priv)
2362 {
2363 struct net_device *dev = priv->ndev;
2364 unsigned long flags;
2365 int err;
2366
2367 priv->hw.ops->lock_irqsave(&priv->lock, &flags);
2368
2369 err = orinoco_reinit_firmware(priv);
2370 if (err) {
2371 printk(KERN_ERR "%s: Error %d re-initializing firmware\n",
2372 dev->name, err);
2373 goto exit;
2374 }
2375
2376 netif_device_attach(dev);
2377 priv->hw_unavailable--;
2378
2379 if (priv->open && !priv->hw_unavailable) {
2380 err = __orinoco_up(priv);
2381 if (err)
2382 printk(KERN_ERR "%s: Error %d restarting card\n",
2383 dev->name, err);
2384 }
2385
2386 exit:
2387 priv->hw.ops->unlock_irqrestore(&priv->lock, &flags);
2388
2389 return 0;
2390 }
2391 EXPORT_SYMBOL(orinoco_up);
2392
2393 void orinoco_down(struct orinoco_private *priv)
2394 {
2395 struct net_device *dev = priv->ndev;
2396 unsigned long flags;
2397 int err;
2398
2399 priv->hw.ops->lock_irqsave(&priv->lock, &flags);
2400 err = __orinoco_down(priv);
2401 if (err)
2402 printk(KERN_WARNING "%s: Error %d downing interface\n",
2403 dev->name, err);
2404
2405 netif_device_detach(dev);
2406 priv->hw_unavailable++;
2407 priv->hw.ops->unlock_irqrestore(&priv->lock, &flags);
2408 }
2409 EXPORT_SYMBOL(orinoco_down);
2410
2411 /********************************************************************/
2412 /* Module initialization */
2413 /********************************************************************/
2414
2415 /* Can't be declared "const" or the whole __initdata section will
2416 * become const */
2417 static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
2418 " (David Gibson <hermes@gibson.dropbear.id.au>, "
2419 "Pavel Roskin <proski@gnu.org>, et al)";
2420
2421 static int __init init_orinoco(void)
2422 {
2423 printk(KERN_DEBUG "%s\n", version);
2424 return 0;
2425 }
2426
2427 static void __exit exit_orinoco(void)
2428 {
2429 }
2430
2431 module_init(init_orinoco);
2432 module_exit(exit_orinoco);