Version:  2.0.40 2.2.26 2.4.37 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0

Linux/drivers/net/wireless/orinoco/orinoco_usb.c

  1 /*
  2  * USB Orinoco driver
  3  *
  4  * Copyright (c) 2003 Manuel Estrada Sainz
  5  *
  6  * The contents of this file are subject to the Mozilla Public License
  7  * Version 1.1 (the "License"); you may not use this file except in
  8  * compliance with the License. You may obtain a copy of the License
  9  * at http://www.mozilla.org/MPL/
 10  *
 11  * Software distributed under the License is distributed on an "AS IS"
 12  * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 13  * the License for the specific language governing rights and
 14  * limitations under the License.
 15  *
 16  * Alternatively, the contents of this file may be used under the
 17  * terms of the GNU General Public License version 2 (the "GPL"), in
 18  * which case the provisions of the GPL are applicable instead of the
 19  * above.  If you wish to allow the use of your version of this file
 20  * only under the terms of the GPL and not to allow others to use your
 21  * version of this file under the MPL, indicate your decision by
 22  * deleting the provisions above and replace them with the notice and
 23  * other provisions required by the GPL.  If you do not delete the
 24  * provisions above, a recipient may use your version of this file
 25  * under either the MPL or the GPL.
 26  *
 27  * Queueing code based on linux-wlan-ng 0.2.1-pre5
 28  *
 29  * Copyright (C) 1999 AbsoluteValue Systems, Inc.  All Rights Reserved.
 30  *
 31  *      The license is the same as above.
 32  *
 33  * Initialy based on USB Skeleton driver - 0.7
 34  *
 35  * Copyright (c) 2001 Greg Kroah-Hartman (greg@kroah.com)
 36  *
 37  *      This program is free software; you can redistribute it and/or
 38  *      modify it under the terms of the GNU General Public License as
 39  *      published by the Free Software Foundation; either version 2 of
 40  *      the License, or (at your option) any later version.
 41  *
 42  * NOTE: The original USB Skeleton driver is GPL, but all that code is
 43  * gone so MPL/GPL applies.
 44  */
 45 
 46 #define DRIVER_NAME "orinoco_usb"
 47 #define PFX DRIVER_NAME ": "
 48 
 49 #include <linux/module.h>
 50 #include <linux/kernel.h>
 51 #include <linux/sched.h>
 52 #include <linux/signal.h>
 53 #include <linux/errno.h>
 54 #include <linux/poll.h>
 55 #include <linux/slab.h>
 56 #include <linux/fcntl.h>
 57 #include <linux/spinlock.h>
 58 #include <linux/list.h>
 59 #include <linux/usb.h>
 60 #include <linux/timer.h>
 61 
 62 #include <linux/netdevice.h>
 63 #include <linux/if_arp.h>
 64 #include <linux/etherdevice.h>
 65 #include <linux/wireless.h>
 66 #include <linux/firmware.h>
 67 
 68 #include "mic.h"
 69 #include "orinoco.h"
 70 
 71 #ifndef URB_ASYNC_UNLINK
 72 #define URB_ASYNC_UNLINK 0
 73 #endif
 74 
 75 /* 802.2 LLC/SNAP header used for Ethernet encapsulation over 802.11 */
 76 static const u8 encaps_hdr[] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00};
 77 #define ENCAPS_OVERHEAD         (sizeof(encaps_hdr) + 2)
 78 
 79 struct header_struct {
 80         /* 802.3 */
 81         u8 dest[ETH_ALEN];
 82         u8 src[ETH_ALEN];
 83         __be16 len;
 84         /* 802.2 */
 85         u8 dsap;
 86         u8 ssap;
 87         u8 ctrl;
 88         /* SNAP */
 89         u8 oui[3];
 90         __be16 ethertype;
 91 } __packed;
 92 
 93 struct ez_usb_fw {
 94         u16 size;
 95         const u8 *code;
 96 };
 97 
 98 static struct ez_usb_fw firmware = {
 99         .size = 0,
100         .code = NULL,
101 };
102 
103 /* Debugging macros */
104 #undef err
105 #define err(format, arg...) \
106         do { printk(KERN_ERR PFX format "\n", ## arg); } while (0)
107 
108 MODULE_FIRMWARE("orinoco_ezusb_fw");
109 
110 /*
111  * Under some conditions, the card gets stuck and stops paying attention
112  * to the world (i.e. data communication stalls) until we do something to
113  * it.  Sending an INQ_TALLIES command seems to be enough and should be
114  * harmless otherwise.  This behaviour has been observed when using the
115  * driver on a systemimager client during installation.  In the past a
116  * timer was used to send INQ_TALLIES commands when there was no other
117  * activity, but it was troublesome and was removed.
118  */
119 
120 #define USB_COMPAQ_VENDOR_ID     0x049f /* Compaq Computer Corp. */
121 #define USB_COMPAQ_WL215_ID      0x001f /* Compaq WL215 USB Adapter */
122 #define USB_COMPAQ_W200_ID       0x0076 /* Compaq W200 USB Adapter */
123 #define USB_HP_WL215_ID          0x0082 /* Compaq WL215 USB Adapter */
124 
125 #define USB_MELCO_VENDOR_ID      0x0411
126 #define USB_BUFFALO_L11_ID       0x0006 /* BUFFALO WLI-USB-L11 */
127 #define USB_BUFFALO_L11G_WR_ID   0x000B /* BUFFALO WLI-USB-L11G-WR */
128 #define USB_BUFFALO_L11G_ID      0x000D /* BUFFALO WLI-USB-L11G */
129 
130 #define USB_LUCENT_VENDOR_ID     0x047E /* Lucent Technologies */
131 #define USB_LUCENT_ORINOCO_ID    0x0300 /* Lucent/Agere Orinoco USB Client */
132 
133 #define USB_AVAYA8_VENDOR_ID     0x0D98
134 #define USB_AVAYAE_VENDOR_ID     0x0D9E
135 #define USB_AVAYA_WIRELESS_ID    0x0300 /* Avaya Wireless USB Card */
136 
137 #define USB_AGERE_VENDOR_ID      0x0D4E /* Agere Systems */
138 #define USB_AGERE_MODEL0801_ID   0x1000 /* Wireless USB Card Model 0801 */
139 #define USB_AGERE_MODEL0802_ID   0x1001 /* Wireless USB Card Model 0802 */
140 #define USB_AGERE_REBRANDED_ID   0x047A /* WLAN USB Card */
141 
142 #define USB_ELSA_VENDOR_ID       0x05CC
143 #define USB_ELSA_AIRLANCER_ID    0x3100 /* ELSA AirLancer USB-11 */
144 
145 #define USB_LEGEND_VENDOR_ID     0x0E7C
146 #define USB_LEGEND_JOYNET_ID     0x0300 /* Joynet WLAN USB Card */
147 
148 #define USB_SAMSUNG_VENDOR_ID    0x04E8
149 #define USB_SAMSUNG_SEW2001U1_ID 0x5002 /* Samsung SEW-2001u Card */
150 #define USB_SAMSUNG_SEW2001U2_ID 0x5B11 /* Samsung SEW-2001u Card */
151 #define USB_SAMSUNG_SEW2003U_ID  0x7011 /* Samsung SEW-2003U Card */
152 
153 #define USB_IGATE_VENDOR_ID      0x0681
154 #define USB_IGATE_IGATE_11M_ID   0x0012 /* I-GATE 11M USB Card */
155 
156 #define USB_FUJITSU_VENDOR_ID    0x0BF8
157 #define USB_FUJITSU_E1100_ID     0x1002 /* connect2AIR WLAN E-1100 USB */
158 
159 #define USB_2WIRE_VENDOR_ID      0x1630
160 #define USB_2WIRE_WIRELESS_ID    0xff81 /* 2Wire Wireless USB adapter */
161 
162 
163 #define EZUSB_REQUEST_FW_TRANS          0xA0
164 #define EZUSB_REQUEST_TRIGER            0xAA
165 #define EZUSB_REQUEST_TRIG_AC           0xAC
166 #define EZUSB_CPUCS_REG                 0x7F92
167 
168 #define EZUSB_RID_TX                    0x0700
169 #define EZUSB_RID_RX                    0x0701
170 #define EZUSB_RID_INIT1                 0x0702
171 #define EZUSB_RID_ACK                   0x0710
172 #define EZUSB_RID_READ_PDA              0x0800
173 #define EZUSB_RID_PROG_INIT             0x0852
174 #define EZUSB_RID_PROG_SET_ADDR         0x0853
175 #define EZUSB_RID_PROG_BYTES            0x0854
176 #define EZUSB_RID_PROG_END              0x0855
177 #define EZUSB_RID_DOCMD                 0x0860
178 
179 /* Recognize info frames */
180 #define EZUSB_IS_INFO(id)               ((id >= 0xF000) && (id <= 0xF2FF))
181 
182 #define EZUSB_MAGIC                     0x0210
183 
184 #define EZUSB_FRAME_DATA                1
185 #define EZUSB_FRAME_CONTROL             2
186 
187 #define DEF_TIMEOUT                     (3 * HZ)
188 
189 #define BULK_BUF_SIZE                   2048
190 
191 #define MAX_DL_SIZE (BULK_BUF_SIZE - sizeof(struct ezusb_packet))
192 
193 #define FW_BUF_SIZE                     64
194 #define FW_VAR_OFFSET_PTR               0x359
195 #define FW_VAR_VALUE                    0
196 #define FW_HOLE_START                   0x100
197 #define FW_HOLE_END                     0x300
198 
199 struct ezusb_packet {
200         __le16 magic;           /* 0x0210 */
201         u8 req_reply_count;
202         u8 ans_reply_count;
203         __le16 frame_type;      /* 0x01 for data frames, 0x02 otherwise */
204         __le16 size;            /* transport size */
205         __le16 crc;             /* CRC up to here */
206         __le16 hermes_len;
207         __le16 hermes_rid;
208         u8 data[0];
209 } __packed;
210 
211 /* Table of devices that work or may work with this driver */
212 static struct usb_device_id ezusb_table[] = {
213         {USB_DEVICE(USB_COMPAQ_VENDOR_ID, USB_COMPAQ_WL215_ID)},
214         {USB_DEVICE(USB_COMPAQ_VENDOR_ID, USB_HP_WL215_ID)},
215         {USB_DEVICE(USB_COMPAQ_VENDOR_ID, USB_COMPAQ_W200_ID)},
216         {USB_DEVICE(USB_MELCO_VENDOR_ID, USB_BUFFALO_L11_ID)},
217         {USB_DEVICE(USB_MELCO_VENDOR_ID, USB_BUFFALO_L11G_WR_ID)},
218         {USB_DEVICE(USB_MELCO_VENDOR_ID, USB_BUFFALO_L11G_ID)},
219         {USB_DEVICE(USB_LUCENT_VENDOR_ID, USB_LUCENT_ORINOCO_ID)},
220         {USB_DEVICE(USB_AVAYA8_VENDOR_ID, USB_AVAYA_WIRELESS_ID)},
221         {USB_DEVICE(USB_AVAYAE_VENDOR_ID, USB_AVAYA_WIRELESS_ID)},
222         {USB_DEVICE(USB_AGERE_VENDOR_ID, USB_AGERE_MODEL0801_ID)},
223         {USB_DEVICE(USB_AGERE_VENDOR_ID, USB_AGERE_MODEL0802_ID)},
224         {USB_DEVICE(USB_ELSA_VENDOR_ID, USB_ELSA_AIRLANCER_ID)},
225         {USB_DEVICE(USB_LEGEND_VENDOR_ID, USB_LEGEND_JOYNET_ID)},
226         {USB_DEVICE_VER(USB_SAMSUNG_VENDOR_ID, USB_SAMSUNG_SEW2001U1_ID,
227                         0, 0)},
228         {USB_DEVICE(USB_SAMSUNG_VENDOR_ID, USB_SAMSUNG_SEW2001U2_ID)},
229         {USB_DEVICE(USB_SAMSUNG_VENDOR_ID, USB_SAMSUNG_SEW2003U_ID)},
230         {USB_DEVICE(USB_IGATE_VENDOR_ID, USB_IGATE_IGATE_11M_ID)},
231         {USB_DEVICE(USB_FUJITSU_VENDOR_ID, USB_FUJITSU_E1100_ID)},
232         {USB_DEVICE(USB_2WIRE_VENDOR_ID, USB_2WIRE_WIRELESS_ID)},
233         {USB_DEVICE(USB_AGERE_VENDOR_ID, USB_AGERE_REBRANDED_ID)},
234         {}                      /* Terminating entry */
235 };
236 
237 MODULE_DEVICE_TABLE(usb, ezusb_table);
238 
239 /* Structure to hold all of our device specific stuff */
240 struct ezusb_priv {
241         struct usb_device *udev;
242         struct net_device *dev;
243         struct mutex mtx;
244         spinlock_t req_lock;
245         struct list_head req_pending;
246         struct list_head req_active;
247         spinlock_t reply_count_lock;
248         u16 hermes_reg_fake[0x40];
249         u8 *bap_buf;
250         struct urb *read_urb;
251         int read_pipe;
252         int write_pipe;
253         u8 reply_count;
254 };
255 
256 enum ezusb_state {
257         EZUSB_CTX_START,
258         EZUSB_CTX_QUEUED,
259         EZUSB_CTX_REQ_SUBMITTED,
260         EZUSB_CTX_REQ_COMPLETE,
261         EZUSB_CTX_RESP_RECEIVED,
262         EZUSB_CTX_REQ_TIMEOUT,
263         EZUSB_CTX_REQ_FAILED,
264         EZUSB_CTX_RESP_TIMEOUT,
265         EZUSB_CTX_REQSUBMIT_FAIL,
266         EZUSB_CTX_COMPLETE,
267 };
268 
269 struct request_context {
270         struct list_head list;
271         atomic_t refcount;
272         struct completion done; /* Signals that CTX is dead */
273         int killed;
274         struct urb *outurb;     /* OUT for req pkt */
275         struct ezusb_priv *upriv;
276         struct ezusb_packet *buf;
277         int buf_length;
278         struct timer_list timer;        /* Timeout handling */
279         enum ezusb_state state; /* Current state */
280         /* the RID that we will wait for */
281         u16 out_rid;
282         u16 in_rid;
283 };
284 
285 
286 /* Forward declarations */
287 static void ezusb_ctx_complete(struct request_context *ctx);
288 static void ezusb_req_queue_run(struct ezusb_priv *upriv);
289 static void ezusb_bulk_in_callback(struct urb *urb);
290 
291 static inline u8 ezusb_reply_inc(u8 count)
292 {
293         if (count < 0x7F)
294                 return count + 1;
295         else
296                 return 1;
297 }
298 
299 static void ezusb_request_context_put(struct request_context *ctx)
300 {
301         if (!atomic_dec_and_test(&ctx->refcount))
302                 return;
303 
304         WARN_ON(!ctx->done.done);
305         BUG_ON(ctx->outurb->status == -EINPROGRESS);
306         BUG_ON(timer_pending(&ctx->timer));
307         usb_free_urb(ctx->outurb);
308         kfree(ctx->buf);
309         kfree(ctx);
310 }
311 
312 static inline void ezusb_mod_timer(struct ezusb_priv *upriv,
313                                    struct timer_list *timer,
314                                    unsigned long expire)
315 {
316         if (!upriv->udev)
317                 return;
318         mod_timer(timer, expire);
319 }
320 
321 static void ezusb_request_timerfn(u_long _ctx)
322 {
323         struct request_context *ctx = (void *) _ctx;
324 
325         ctx->outurb->transfer_flags |= URB_ASYNC_UNLINK;
326         if (usb_unlink_urb(ctx->outurb) == -EINPROGRESS) {
327                 ctx->state = EZUSB_CTX_REQ_TIMEOUT;
328         } else {
329                 ctx->state = EZUSB_CTX_RESP_TIMEOUT;
330                 dev_dbg(&ctx->outurb->dev->dev, "couldn't unlink\n");
331                 atomic_inc(&ctx->refcount);
332                 ctx->killed = 1;
333                 ezusb_ctx_complete(ctx);
334                 ezusb_request_context_put(ctx);
335         }
336 };
337 
338 static struct request_context *ezusb_alloc_ctx(struct ezusb_priv *upriv,
339                                                u16 out_rid, u16 in_rid)
340 {
341         struct request_context *ctx;
342 
343         ctx = kzalloc(sizeof(*ctx), GFP_ATOMIC);
344         if (!ctx)
345                 return NULL;
346 
347         ctx->buf = kmalloc(BULK_BUF_SIZE, GFP_ATOMIC);
348         if (!ctx->buf) {
349                 kfree(ctx);
350                 return NULL;
351         }
352         ctx->outurb = usb_alloc_urb(0, GFP_ATOMIC);
353         if (!ctx->outurb) {
354                 kfree(ctx->buf);
355                 kfree(ctx);
356                 return NULL;
357         }
358 
359         ctx->upriv = upriv;
360         ctx->state = EZUSB_CTX_START;
361         ctx->out_rid = out_rid;
362         ctx->in_rid = in_rid;
363 
364         atomic_set(&ctx->refcount, 1);
365         init_completion(&ctx->done);
366 
367         setup_timer(&ctx->timer, ezusb_request_timerfn, (u_long)ctx);
368         return ctx;
369 }
370 
371 
372 /* Hopefully the real complete_all will soon be exported, in the mean
373  * while this should work. */
374 static inline void ezusb_complete_all(struct completion *comp)
375 {
376         complete(comp);
377         complete(comp);
378         complete(comp);
379         complete(comp);
380 }
381 
382 static void ezusb_ctx_complete(struct request_context *ctx)
383 {
384         struct ezusb_priv *upriv = ctx->upriv;
385         unsigned long flags;
386 
387         spin_lock_irqsave(&upriv->req_lock, flags);
388 
389         list_del_init(&ctx->list);
390         if (upriv->udev) {
391                 spin_unlock_irqrestore(&upriv->req_lock, flags);
392                 ezusb_req_queue_run(upriv);
393                 spin_lock_irqsave(&upriv->req_lock, flags);
394         }
395 
396         switch (ctx->state) {
397         case EZUSB_CTX_COMPLETE:
398         case EZUSB_CTX_REQSUBMIT_FAIL:
399         case EZUSB_CTX_REQ_FAILED:
400         case EZUSB_CTX_REQ_TIMEOUT:
401         case EZUSB_CTX_RESP_TIMEOUT:
402                 spin_unlock_irqrestore(&upriv->req_lock, flags);
403 
404                 if ((ctx->out_rid == EZUSB_RID_TX) && upriv->dev) {
405                         struct net_device *dev = upriv->dev;
406                         struct orinoco_private *priv = ndev_priv(dev);
407                         struct net_device_stats *stats = &priv->stats;
408 
409                         if (ctx->state != EZUSB_CTX_COMPLETE)
410                                 stats->tx_errors++;
411                         else
412                                 stats->tx_packets++;
413 
414                         netif_wake_queue(dev);
415                 }
416                 ezusb_complete_all(&ctx->done);
417                 ezusb_request_context_put(ctx);
418                 break;
419 
420         default:
421                 spin_unlock_irqrestore(&upriv->req_lock, flags);
422                 if (!upriv->udev) {
423                         /* This is normal, as all request contexts get flushed
424                          * when the device is disconnected */
425                         err("Called, CTX not terminating, but device gone");
426                         ezusb_complete_all(&ctx->done);
427                         ezusb_request_context_put(ctx);
428                         break;
429                 }
430 
431                 err("Called, CTX not in terminating state.");
432                 /* Things are really bad if this happens. Just leak
433                  * the CTX because it may still be linked to the
434                  * queue or the OUT urb may still be active.
435                  * Just leaking at least prevents an Oops or Panic.
436                  */
437                 break;
438         }
439 }
440 
441 /**
442  * ezusb_req_queue_run:
443  * Description:
444  *      Note: Only one active CTX at any one time, because there's no
445  *      other (reliable) way to match the response URB to the correct
446  *      CTX.
447  **/
448 static void ezusb_req_queue_run(struct ezusb_priv *upriv)
449 {
450         unsigned long flags;
451         struct request_context *ctx;
452         int result;
453 
454         spin_lock_irqsave(&upriv->req_lock, flags);
455 
456         if (!list_empty(&upriv->req_active))
457                 goto unlock;
458 
459         if (list_empty(&upriv->req_pending))
460                 goto unlock;
461 
462         ctx =
463             list_entry(upriv->req_pending.next, struct request_context,
464                        list);
465 
466         if (!ctx->upriv->udev)
467                 goto unlock;
468 
469         /* We need to split this off to avoid a race condition */
470         list_move_tail(&ctx->list, &upriv->req_active);
471 
472         if (ctx->state == EZUSB_CTX_QUEUED) {
473                 atomic_inc(&ctx->refcount);
474                 result = usb_submit_urb(ctx->outurb, GFP_ATOMIC);
475                 if (result) {
476                         ctx->state = EZUSB_CTX_REQSUBMIT_FAIL;
477 
478                         spin_unlock_irqrestore(&upriv->req_lock, flags);
479 
480                         err("Fatal, failed to submit command urb."
481                             " error=%d\n", result);
482 
483                         ezusb_ctx_complete(ctx);
484                         ezusb_request_context_put(ctx);
485                         goto done;
486                 }
487 
488                 ctx->state = EZUSB_CTX_REQ_SUBMITTED;
489                 ezusb_mod_timer(ctx->upriv, &ctx->timer,
490                                 jiffies + DEF_TIMEOUT);
491         }
492 
493  unlock:
494         spin_unlock_irqrestore(&upriv->req_lock, flags);
495 
496  done:
497         return;
498 }
499 
500 static void ezusb_req_enqueue_run(struct ezusb_priv *upriv,
501                                   struct request_context *ctx)
502 {
503         unsigned long flags;
504 
505         spin_lock_irqsave(&upriv->req_lock, flags);
506 
507         if (!ctx->upriv->udev) {
508                 spin_unlock_irqrestore(&upriv->req_lock, flags);
509                 goto done;
510         }
511         atomic_inc(&ctx->refcount);
512         list_add_tail(&ctx->list, &upriv->req_pending);
513         spin_unlock_irqrestore(&upriv->req_lock, flags);
514 
515         ctx->state = EZUSB_CTX_QUEUED;
516         ezusb_req_queue_run(upriv);
517 
518  done:
519         return;
520 }
521 
522 static void ezusb_request_out_callback(struct urb *urb)
523 {
524         unsigned long flags;
525         enum ezusb_state state;
526         struct request_context *ctx = urb->context;
527         struct ezusb_priv *upriv = ctx->upriv;
528 
529         spin_lock_irqsave(&upriv->req_lock, flags);
530 
531         del_timer(&ctx->timer);
532 
533         if (ctx->killed) {
534                 spin_unlock_irqrestore(&upriv->req_lock, flags);
535                 pr_warn("interrupt called with dead ctx\n");
536                 goto out;
537         }
538 
539         state = ctx->state;
540 
541         if (urb->status == 0) {
542                 switch (state) {
543                 case EZUSB_CTX_REQ_SUBMITTED:
544                         if (ctx->in_rid) {
545                                 ctx->state = EZUSB_CTX_REQ_COMPLETE;
546                                 /* reply URB still pending */
547                                 ezusb_mod_timer(upriv, &ctx->timer,
548                                                 jiffies + DEF_TIMEOUT);
549                                 spin_unlock_irqrestore(&upriv->req_lock,
550                                                        flags);
551                                 break;
552                         }
553                         /* fall through */
554                 case EZUSB_CTX_RESP_RECEIVED:
555                         /* IN already received before this OUT-ACK */
556                         ctx->state = EZUSB_CTX_COMPLETE;
557                         spin_unlock_irqrestore(&upriv->req_lock, flags);
558                         ezusb_ctx_complete(ctx);
559                         break;
560 
561                 default:
562                         spin_unlock_irqrestore(&upriv->req_lock, flags);
563                         err("Unexpected state(0x%x, %d) in OUT URB",
564                             state, urb->status);
565                         break;
566                 }
567         } else {
568                 /* If someone cancels the OUT URB then its status
569                  * should be either -ECONNRESET or -ENOENT.
570                  */
571                 switch (state) {
572                 case EZUSB_CTX_REQ_SUBMITTED:
573                 case EZUSB_CTX_RESP_RECEIVED:
574                         ctx->state = EZUSB_CTX_REQ_FAILED;
575                         /* fall through */
576 
577                 case EZUSB_CTX_REQ_FAILED:
578                 case EZUSB_CTX_REQ_TIMEOUT:
579                         spin_unlock_irqrestore(&upriv->req_lock, flags);
580 
581                         ezusb_ctx_complete(ctx);
582                         break;
583 
584                 default:
585                         spin_unlock_irqrestore(&upriv->req_lock, flags);
586 
587                         err("Unexpected state(0x%x, %d) in OUT URB",
588                             state, urb->status);
589                         break;
590                 }
591         }
592  out:
593         ezusb_request_context_put(ctx);
594 }
595 
596 static void ezusb_request_in_callback(struct ezusb_priv *upriv,
597                                       struct urb *urb)
598 {
599         struct ezusb_packet *ans = urb->transfer_buffer;
600         struct request_context *ctx = NULL;
601         enum ezusb_state state;
602         unsigned long flags;
603 
604         /* Find the CTX on the active queue that requested this URB */
605         spin_lock_irqsave(&upriv->req_lock, flags);
606         if (upriv->udev) {
607                 struct list_head *item;
608 
609                 list_for_each(item, &upriv->req_active) {
610                         struct request_context *c;
611                         int reply_count;
612 
613                         c = list_entry(item, struct request_context, list);
614                         reply_count =
615                             ezusb_reply_inc(c->buf->req_reply_count);
616                         if ((ans->ans_reply_count == reply_count)
617                             && (le16_to_cpu(ans->hermes_rid) == c->in_rid)) {
618                                 ctx = c;
619                                 break;
620                         }
621                         netdev_dbg(upriv->dev, "Skipped (0x%x/0x%x) (%d/%d)\n",
622                                    le16_to_cpu(ans->hermes_rid), c->in_rid,
623                                    ans->ans_reply_count, reply_count);
624                 }
625         }
626 
627         if (ctx == NULL) {
628                 spin_unlock_irqrestore(&upriv->req_lock, flags);
629                 err("%s: got unexpected RID: 0x%04X", __func__,
630                     le16_to_cpu(ans->hermes_rid));
631                 ezusb_req_queue_run(upriv);
632                 return;
633         }
634 
635         /* The data we want is in the in buffer, exchange */
636         urb->transfer_buffer = ctx->buf;
637         ctx->buf = (void *) ans;
638         ctx->buf_length = urb->actual_length;
639 
640         state = ctx->state;
641         switch (state) {
642         case EZUSB_CTX_REQ_SUBMITTED:
643                 /* We have received our response URB before
644                  * our request has been acknowledged. Do NOT
645                  * destroy our CTX yet, because our OUT URB
646                  * is still alive ...
647                  */
648                 ctx->state = EZUSB_CTX_RESP_RECEIVED;
649                 spin_unlock_irqrestore(&upriv->req_lock, flags);
650 
651                 /* Let the machine continue running. */
652                 break;
653 
654         case EZUSB_CTX_REQ_COMPLETE:
655                 /* This is the usual path: our request
656                  * has already been acknowledged, and
657                  * we have now received the reply.
658                  */
659                 ctx->state = EZUSB_CTX_COMPLETE;
660 
661                 /* Stop the intimer */
662                 del_timer(&ctx->timer);
663                 spin_unlock_irqrestore(&upriv->req_lock, flags);
664 
665                 /* Call the completion handler */
666                 ezusb_ctx_complete(ctx);
667                 break;
668 
669         default:
670                 spin_unlock_irqrestore(&upriv->req_lock, flags);
671 
672                 pr_warn("Matched IN URB, unexpected context state(0x%x)\n",
673                         state);
674                 /* Throw this CTX away and try submitting another */
675                 del_timer(&ctx->timer);
676                 ctx->outurb->transfer_flags |= URB_ASYNC_UNLINK;
677                 usb_unlink_urb(ctx->outurb);
678                 ezusb_req_queue_run(upriv);
679                 break;
680         }                       /* switch */
681 }
682 
683 
684 static void ezusb_req_ctx_wait(struct ezusb_priv *upriv,
685                                struct request_context *ctx)
686 {
687         switch (ctx->state) {
688         case EZUSB_CTX_QUEUED:
689         case EZUSB_CTX_REQ_SUBMITTED:
690         case EZUSB_CTX_REQ_COMPLETE:
691         case EZUSB_CTX_RESP_RECEIVED:
692                 if (in_softirq()) {
693                         /* If we get called from a timer, timeout timers don't
694                          * get the chance to run themselves. So we make sure
695                          * that we don't sleep for ever */
696                         int msecs = DEF_TIMEOUT * (1000 / HZ);
697                         while (!ctx->done.done && msecs--)
698                                 udelay(1000);
699                 } else {
700                         wait_event_interruptible(ctx->done.wait,
701                                                  ctx->done.done);
702                 }
703                 break;
704         default:
705                 /* Done or failed - nothing to wait for */
706                 break;
707         }
708 }
709 
710 static inline u16 build_crc(struct ezusb_packet *data)
711 {
712         u16 crc = 0;
713         u8 *bytes = (u8 *)data;
714         int i;
715 
716         for (i = 0; i < 8; i++)
717                 crc = (crc << 1) + bytes[i];
718 
719         return crc;
720 }
721 
722 /**
723  * ezusb_fill_req:
724  *
725  * if data == NULL and length > 0 the data is assumed to be already in
726  * the target buffer and only the header is filled.
727  *
728  */
729 static int ezusb_fill_req(struct ezusb_packet *req, u16 length, u16 rid,
730                           const void *data, u16 frame_type, u8 reply_count)
731 {
732         int total_size = sizeof(*req) + length;
733 
734         BUG_ON(total_size > BULK_BUF_SIZE);
735 
736         req->magic = cpu_to_le16(EZUSB_MAGIC);
737         req->req_reply_count = reply_count;
738         req->ans_reply_count = 0;
739         req->frame_type = cpu_to_le16(frame_type);
740         req->size = cpu_to_le16(length + 4);
741         req->crc = cpu_to_le16(build_crc(req));
742         req->hermes_len = cpu_to_le16(HERMES_BYTES_TO_RECLEN(length));
743         req->hermes_rid = cpu_to_le16(rid);
744         if (data)
745                 memcpy(req->data, data, length);
746         return total_size;
747 }
748 
749 static int ezusb_submit_in_urb(struct ezusb_priv *upriv)
750 {
751         int retval = 0;
752         void *cur_buf = upriv->read_urb->transfer_buffer;
753 
754         if (upriv->read_urb->status == -EINPROGRESS) {
755                 netdev_dbg(upriv->dev, "urb busy, not resubmiting\n");
756                 retval = -EBUSY;
757                 goto exit;
758         }
759         usb_fill_bulk_urb(upriv->read_urb, upriv->udev, upriv->read_pipe,
760                           cur_buf, BULK_BUF_SIZE,
761                           ezusb_bulk_in_callback, upriv);
762         upriv->read_urb->transfer_flags = 0;
763         retval = usb_submit_urb(upriv->read_urb, GFP_ATOMIC);
764         if (retval)
765                 err("%s submit failed %d", __func__, retval);
766 
767  exit:
768         return retval;
769 }
770 
771 static inline int ezusb_8051_cpucs(struct ezusb_priv *upriv, int reset)
772 {
773         u8 res_val = reset;     /* avoid argument promotion */
774 
775         if (!upriv->udev) {
776                 err("%s: !upriv->udev", __func__);
777                 return -EFAULT;
778         }
779         return usb_control_msg(upriv->udev,
780                                usb_sndctrlpipe(upriv->udev, 0),
781                                EZUSB_REQUEST_FW_TRANS,
782                                USB_TYPE_VENDOR | USB_RECIP_DEVICE |
783                                USB_DIR_OUT, EZUSB_CPUCS_REG, 0, &res_val,
784                                sizeof(res_val), DEF_TIMEOUT);
785 }
786 
787 static int ezusb_firmware_download(struct ezusb_priv *upriv,
788                                    struct ez_usb_fw *fw)
789 {
790         u8 *fw_buffer;
791         int retval, addr;
792         int variant_offset;
793 
794         fw_buffer = kmalloc(FW_BUF_SIZE, GFP_KERNEL);
795         if (!fw_buffer) {
796                 printk(KERN_ERR PFX "Out of memory for firmware buffer.\n");
797                 return -ENOMEM;
798         }
799         /*
800          * This byte is 1 and should be replaced with 0.  The offset is
801          * 0x10AD in version 0.0.6.  The byte in question should follow
802          * the end of the code pointed to by the jump in the beginning
803          * of the firmware.  Also, it is read by code located at 0x358.
804          */
805         variant_offset = be16_to_cpup((__be16 *) &fw->code[FW_VAR_OFFSET_PTR]);
806         if (variant_offset >= fw->size) {
807                 printk(KERN_ERR PFX "Invalid firmware variant offset: "
808                        "0x%04x\n", variant_offset);
809                 retval = -EINVAL;
810                 goto fail;
811         }
812 
813         retval = ezusb_8051_cpucs(upriv, 1);
814         if (retval < 0)
815                 goto fail;
816         for (addr = 0; addr < fw->size; addr += FW_BUF_SIZE) {
817                 /* 0x100-0x300 should be left alone, it contains card
818                  * specific data, like USB enumeration information */
819                 if ((addr >= FW_HOLE_START) && (addr < FW_HOLE_END))
820                         continue;
821 
822                 memcpy(fw_buffer, &fw->code[addr], FW_BUF_SIZE);
823                 if (variant_offset >= addr &&
824                     variant_offset < addr + FW_BUF_SIZE) {
825                         netdev_dbg(upriv->dev,
826                                    "Patching card_variant byte at 0x%04X\n",
827                                    variant_offset);
828                         fw_buffer[variant_offset - addr] = FW_VAR_VALUE;
829                 }
830                 retval = usb_control_msg(upriv->udev,
831                                          usb_sndctrlpipe(upriv->udev, 0),
832                                          EZUSB_REQUEST_FW_TRANS,
833                                          USB_TYPE_VENDOR | USB_RECIP_DEVICE
834                                          | USB_DIR_OUT,
835                                          addr, 0x0,
836                                          fw_buffer, FW_BUF_SIZE,
837                                          DEF_TIMEOUT);
838 
839                 if (retval < 0)
840                         goto fail;
841         }
842         retval = ezusb_8051_cpucs(upriv, 0);
843         if (retval < 0)
844                 goto fail;
845 
846         goto exit;
847  fail:
848         printk(KERN_ERR PFX "Firmware download failed, error %d\n",
849                retval);
850  exit:
851         kfree(fw_buffer);
852         return retval;
853 }
854 
855 static int ezusb_access_ltv(struct ezusb_priv *upriv,
856                             struct request_context *ctx,
857                             u16 length, const void *data, u16 frame_type,
858                             void *ans_buff, unsigned ans_size, u16 *ans_length)
859 {
860         int req_size;
861         int retval = 0;
862         enum ezusb_state state;
863 
864         BUG_ON(in_irq());
865 
866         if (!upriv->udev) {
867                 retval = -ENODEV;
868                 goto exit;
869         }
870 
871         if (upriv->read_urb->status != -EINPROGRESS)
872                 err("%s: in urb not pending", __func__);
873 
874         /* protect upriv->reply_count, guarantee sequential numbers */
875         spin_lock_bh(&upriv->reply_count_lock);
876         req_size = ezusb_fill_req(ctx->buf, length, ctx->out_rid, data,
877                                   frame_type, upriv->reply_count);
878         usb_fill_bulk_urb(ctx->outurb, upriv->udev, upriv->write_pipe,
879                           ctx->buf, req_size,
880                           ezusb_request_out_callback, ctx);
881 
882         if (ctx->in_rid)
883                 upriv->reply_count = ezusb_reply_inc(upriv->reply_count);
884 
885         ezusb_req_enqueue_run(upriv, ctx);
886 
887         spin_unlock_bh(&upriv->reply_count_lock);
888 
889         if (ctx->in_rid)
890                 ezusb_req_ctx_wait(upriv, ctx);
891 
892         state = ctx->state;
893         switch (state) {
894         case EZUSB_CTX_COMPLETE:
895                 retval = ctx->outurb->status;
896                 break;
897 
898         case EZUSB_CTX_QUEUED:
899         case EZUSB_CTX_REQ_SUBMITTED:
900                 if (!ctx->in_rid)
901                         break;
902         default:
903                 err("%s: Unexpected context state %d", __func__,
904                     state);
905                 /* fall though */
906         case EZUSB_CTX_REQ_TIMEOUT:
907         case EZUSB_CTX_REQ_FAILED:
908         case EZUSB_CTX_RESP_TIMEOUT:
909         case EZUSB_CTX_REQSUBMIT_FAIL:
910                 printk(KERN_ERR PFX "Access failed, resetting (state %d,"
911                        " reply_count %d)\n", state, upriv->reply_count);
912                 upriv->reply_count = 0;
913                 if (state == EZUSB_CTX_REQ_TIMEOUT
914                     || state == EZUSB_CTX_RESP_TIMEOUT) {
915                         printk(KERN_ERR PFX "ctx timed out\n");
916                         retval = -ETIMEDOUT;
917                 } else {
918                         printk(KERN_ERR PFX "ctx failed\n");
919                         retval = -EFAULT;
920                 }
921                 goto exit;
922         }
923         if (ctx->in_rid) {
924                 struct ezusb_packet *ans = ctx->buf;
925                 unsigned exp_len;
926 
927                 if (ans->hermes_len != 0)
928                         exp_len = le16_to_cpu(ans->hermes_len) * 2 + 12;
929                 else
930                         exp_len = 14;
931 
932                 if (exp_len != ctx->buf_length) {
933                         err("%s: length mismatch for RID 0x%04x: "
934                             "expected %d, got %d", __func__,
935                             ctx->in_rid, exp_len, ctx->buf_length);
936                         retval = -EIO;
937                         goto exit;
938                 }
939 
940                 if (ans_buff)
941                         memcpy(ans_buff, ans->data, min(exp_len, ans_size));
942                 if (ans_length)
943                         *ans_length = le16_to_cpu(ans->hermes_len);
944         }
945  exit:
946         ezusb_request_context_put(ctx);
947         return retval;
948 }
949 
950 static int ezusb_write_ltv(struct hermes *hw, int bap, u16 rid,
951                            u16 length, const void *data)
952 {
953         struct ezusb_priv *upriv = hw->priv;
954         u16 frame_type;
955         struct request_context *ctx;
956 
957         if (length == 0)
958                 return -EINVAL;
959 
960         length = HERMES_RECLEN_TO_BYTES(length);
961 
962         /* On memory mapped devices HERMES_RID_CNFGROUPADDRESSES can be
963          * set to be empty, but the USB bridge doesn't like it */
964         if (length == 0)
965                 return 0;
966 
967         ctx = ezusb_alloc_ctx(upriv, rid, EZUSB_RID_ACK);
968         if (!ctx)
969                 return -ENOMEM;
970 
971         if (rid == EZUSB_RID_TX)
972                 frame_type = EZUSB_FRAME_DATA;
973         else
974                 frame_type = EZUSB_FRAME_CONTROL;
975 
976         return ezusb_access_ltv(upriv, ctx, length, data, frame_type,
977                                 NULL, 0, NULL);
978 }
979 
980 static int ezusb_read_ltv(struct hermes *hw, int bap, u16 rid,
981                           unsigned bufsize, u16 *length, void *buf)
982 {
983         struct ezusb_priv *upriv = hw->priv;
984         struct request_context *ctx;
985 
986         if (bufsize % 2)
987                 return -EINVAL;
988 
989         ctx = ezusb_alloc_ctx(upriv, rid, rid);
990         if (!ctx)
991                 return -ENOMEM;
992 
993         return ezusb_access_ltv(upriv, ctx, 0, NULL, EZUSB_FRAME_CONTROL,
994                                 buf, bufsize, length);
995 }
996 
997 static int ezusb_doicmd_wait(struct hermes *hw, u16 cmd, u16 parm0, u16 parm1,
998                              u16 parm2, struct hermes_response *resp)
999 {
1000         struct ezusb_priv *upriv = hw->priv;
1001         struct request_context *ctx;
1002 
1003         __le16 data[4] = {
1004                 cpu_to_le16(cmd),
1005                 cpu_to_le16(parm0),
1006                 cpu_to_le16(parm1),
1007                 cpu_to_le16(parm2),
1008         };
1009         netdev_dbg(upriv->dev,
1010                    "0x%04X, parm0 0x%04X, parm1 0x%04X, parm2 0x%04X\n", cmd,
1011                    parm0, parm1, parm2);
1012         ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_DOCMD, EZUSB_RID_ACK);
1013         if (!ctx)
1014                 return -ENOMEM;
1015 
1016         return ezusb_access_ltv(upriv, ctx, sizeof(data), &data,
1017                                 EZUSB_FRAME_CONTROL, NULL, 0, NULL);
1018 }
1019 
1020 static int ezusb_docmd_wait(struct hermes *hw, u16 cmd, u16 parm0,
1021                             struct hermes_response *resp)
1022 {
1023         struct ezusb_priv *upriv = hw->priv;
1024         struct request_context *ctx;
1025 
1026         __le16 data[4] = {
1027                 cpu_to_le16(cmd),
1028                 cpu_to_le16(parm0),
1029                 0,
1030                 0,
1031         };
1032         netdev_dbg(upriv->dev, "0x%04X, parm0 0x%04X\n", cmd, parm0);
1033         ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_DOCMD, EZUSB_RID_ACK);
1034         if (!ctx)
1035                 return -ENOMEM;
1036 
1037         return ezusb_access_ltv(upriv, ctx, sizeof(data), &data,
1038                                 EZUSB_FRAME_CONTROL, NULL, 0, NULL);
1039 }
1040 
1041 static int ezusb_bap_pread(struct hermes *hw, int bap,
1042                            void *buf, int len, u16 id, u16 offset)
1043 {
1044         struct ezusb_priv *upriv = hw->priv;
1045         struct ezusb_packet *ans = (void *) upriv->read_urb->transfer_buffer;
1046         int actual_length = upriv->read_urb->actual_length;
1047 
1048         if (id == EZUSB_RID_RX) {
1049                 if ((sizeof(*ans) + offset + len) > actual_length) {
1050                         printk(KERN_ERR PFX "BAP read beyond buffer end "
1051                                "in rx frame\n");
1052                         return -EINVAL;
1053                 }
1054                 memcpy(buf, ans->data + offset, len);
1055                 return 0;
1056         }
1057 
1058         if (EZUSB_IS_INFO(id)) {
1059                 /* Include 4 bytes for length/type */
1060                 if ((sizeof(*ans) + offset + len - 4) > actual_length) {
1061                         printk(KERN_ERR PFX "BAP read beyond buffer end "
1062                                "in info frame\n");
1063                         return -EFAULT;
1064                 }
1065                 memcpy(buf, ans->data + offset - 4, len);
1066         } else {
1067                 printk(KERN_ERR PFX "Unexpected fid 0x%04x\n", id);
1068                 return -EINVAL;
1069         }
1070 
1071         return 0;
1072 }
1073 
1074 static int ezusb_read_pda(struct hermes *hw, __le16 *pda,
1075                           u32 pda_addr, u16 pda_len)
1076 {
1077         struct ezusb_priv *upriv = hw->priv;
1078         struct request_context *ctx;
1079         __le16 data[] = {
1080                 cpu_to_le16(pda_addr & 0xffff),
1081                 cpu_to_le16(pda_len - 4)
1082         };
1083         ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_READ_PDA, EZUSB_RID_READ_PDA);
1084         if (!ctx)
1085                 return -ENOMEM;
1086 
1087         /* wl_lkm does not include PDA size in the PDA area.
1088          * We will pad the information into pda, so other routines
1089          * don't have to be modified */
1090         pda[0] = cpu_to_le16(pda_len - 2);
1091         /* Includes CFG_PROD_DATA but not itself */
1092         pda[1] = cpu_to_le16(0x0800); /* CFG_PROD_DATA */
1093 
1094         return ezusb_access_ltv(upriv, ctx, sizeof(data), &data,
1095                                 EZUSB_FRAME_CONTROL, &pda[2], pda_len - 4,
1096                                 NULL);
1097 }
1098 
1099 static int ezusb_program_init(struct hermes *hw, u32 entry_point)
1100 {
1101         struct ezusb_priv *upriv = hw->priv;
1102         struct request_context *ctx;
1103         __le32 data = cpu_to_le32(entry_point);
1104 
1105         ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_PROG_INIT, EZUSB_RID_ACK);
1106         if (!ctx)
1107                 return -ENOMEM;
1108 
1109         return ezusb_access_ltv(upriv, ctx, sizeof(data), &data,
1110                                 EZUSB_FRAME_CONTROL, NULL, 0, NULL);
1111 }
1112 
1113 static int ezusb_program_end(struct hermes *hw)
1114 {
1115         struct ezusb_priv *upriv = hw->priv;
1116         struct request_context *ctx;
1117 
1118         ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_PROG_END, EZUSB_RID_ACK);
1119         if (!ctx)
1120                 return -ENOMEM;
1121 
1122         return ezusb_access_ltv(upriv, ctx, 0, NULL,
1123                                 EZUSB_FRAME_CONTROL, NULL, 0, NULL);
1124 }
1125 
1126 static int ezusb_program_bytes(struct hermes *hw, const char *buf,
1127                                u32 addr, u32 len)
1128 {
1129         struct ezusb_priv *upriv = hw->priv;
1130         struct request_context *ctx;
1131         __le32 data = cpu_to_le32(addr);
1132         int err;
1133 
1134         ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_PROG_SET_ADDR, EZUSB_RID_ACK);
1135         if (!ctx)
1136                 return -ENOMEM;
1137 
1138         err = ezusb_access_ltv(upriv, ctx, sizeof(data), &data,
1139                                EZUSB_FRAME_CONTROL, NULL, 0, NULL);
1140         if (err)
1141                 return err;
1142 
1143         ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_PROG_BYTES, EZUSB_RID_ACK);
1144         if (!ctx)
1145                 return -ENOMEM;
1146 
1147         return ezusb_access_ltv(upriv, ctx, len, buf,
1148                                 EZUSB_FRAME_CONTROL, NULL, 0, NULL);
1149 }
1150 
1151 static int ezusb_program(struct hermes *hw, const char *buf,
1152                          u32 addr, u32 len)
1153 {
1154         u32 ch_addr;
1155         u32 ch_len;
1156         int err = 0;
1157 
1158         /* We can only send 2048 bytes out of the bulk xmit at a time,
1159          * so we have to split any programming into chunks of <2048
1160          * bytes. */
1161 
1162         ch_len = (len < MAX_DL_SIZE) ? len : MAX_DL_SIZE;
1163         ch_addr = addr;
1164 
1165         while (ch_addr < (addr + len)) {
1166                 pr_debug("Programming subblock of length %d "
1167                          "to address 0x%08x. Data @ %p\n",
1168                          ch_len, ch_addr, &buf[ch_addr - addr]);
1169 
1170                 err = ezusb_program_bytes(hw, &buf[ch_addr - addr],
1171                                           ch_addr, ch_len);
1172                 if (err)
1173                         break;
1174 
1175                 ch_addr += ch_len;
1176                 ch_len = ((addr + len - ch_addr) < MAX_DL_SIZE) ?
1177                         (addr + len - ch_addr) : MAX_DL_SIZE;
1178         }
1179 
1180         return err;
1181 }
1182 
1183 static netdev_tx_t ezusb_xmit(struct sk_buff *skb, struct net_device *dev)
1184 {
1185         struct orinoco_private *priv = ndev_priv(dev);
1186         struct net_device_stats *stats = &priv->stats;
1187         struct ezusb_priv *upriv = priv->card;
1188         u8 mic[MICHAEL_MIC_LEN + 1];
1189         int err = 0;
1190         int tx_control;
1191         unsigned long flags;
1192         struct request_context *ctx;
1193         u8 *buf;
1194         int tx_size;
1195 
1196         if (!netif_running(dev)) {
1197                 printk(KERN_ERR "%s: Tx on stopped device!\n",
1198                        dev->name);
1199                 return NETDEV_TX_BUSY;
1200         }
1201 
1202         if (netif_queue_stopped(dev)) {
1203                 printk(KERN_DEBUG "%s: Tx while transmitter busy!\n",
1204                        dev->name);
1205                 return NETDEV_TX_BUSY;
1206         }
1207 
1208         if (orinoco_lock(priv, &flags) != 0) {
1209                 printk(KERN_ERR
1210                        "%s: ezusb_xmit() called while hw_unavailable\n",
1211                        dev->name);
1212                 return NETDEV_TX_BUSY;
1213         }
1214 
1215         if (!netif_carrier_ok(dev) ||
1216             (priv->iw_mode == NL80211_IFTYPE_MONITOR)) {
1217                 /* Oops, the firmware hasn't established a connection,
1218                    silently drop the packet (this seems to be the
1219                    safest approach). */
1220                 goto drop;
1221         }
1222 
1223         /* Check packet length */
1224         if (skb->len < ETH_HLEN)
1225                 goto drop;
1226 
1227         ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_TX, 0);
1228         if (!ctx)
1229                 goto busy;
1230 
1231         memset(ctx->buf, 0, BULK_BUF_SIZE);
1232         buf = ctx->buf->data;
1233 
1234         tx_control = 0;
1235 
1236         err = orinoco_process_xmit_skb(skb, dev, priv, &tx_control,
1237                                        &mic[0]);
1238         if (err)
1239                 goto drop;
1240 
1241         {
1242                 __le16 *tx_cntl = (__le16 *)buf;
1243                 *tx_cntl = cpu_to_le16(tx_control);
1244                 buf += sizeof(*tx_cntl);
1245         }
1246 
1247         memcpy(buf, skb->data, skb->len);
1248         buf += skb->len;
1249 
1250         if (tx_control & HERMES_TXCTRL_MIC) {
1251                 u8 *m = mic;
1252                 /* Mic has been offset so it can be copied to an even
1253                  * address. We're copying eveything anyway, so we
1254                  * don't need to copy that first byte. */
1255                 if (skb->len % 2)
1256                         m++;
1257                 memcpy(buf, m, MICHAEL_MIC_LEN);
1258                 buf += MICHAEL_MIC_LEN;
1259         }
1260 
1261         /* Finally, we actually initiate the send */
1262         netif_stop_queue(dev);
1263 
1264         /* The card may behave better if we send evenly sized usb transfers */
1265         tx_size = ALIGN(buf - ctx->buf->data, 2);
1266 
1267         err = ezusb_access_ltv(upriv, ctx, tx_size, NULL,
1268                                EZUSB_FRAME_DATA, NULL, 0, NULL);
1269 
1270         if (err) {
1271                 netif_start_queue(dev);
1272                 if (net_ratelimit())
1273                         printk(KERN_ERR "%s: Error %d transmitting packet\n",
1274                                 dev->name, err);
1275                 goto busy;
1276         }
1277 
1278         dev->trans_start = jiffies;
1279         stats->tx_bytes += skb->len;
1280         goto ok;
1281 
1282  drop:
1283         stats->tx_errors++;
1284         stats->tx_dropped++;
1285 
1286  ok:
1287         orinoco_unlock(priv, &flags);
1288         dev_kfree_skb(skb);
1289         return NETDEV_TX_OK;
1290 
1291  busy:
1292         orinoco_unlock(priv, &flags);
1293         return NETDEV_TX_BUSY;
1294 }
1295 
1296 static int ezusb_allocate(struct hermes *hw, u16 size, u16 *fid)
1297 {
1298         *fid = EZUSB_RID_TX;
1299         return 0;
1300 }
1301 
1302 
1303 static int ezusb_hard_reset(struct orinoco_private *priv)
1304 {
1305         struct ezusb_priv *upriv = priv->card;
1306         int retval = ezusb_8051_cpucs(upriv, 1);
1307 
1308         if (retval < 0) {
1309                 err("Failed to reset");
1310                 return retval;
1311         }
1312 
1313         retval = ezusb_8051_cpucs(upriv, 0);
1314         if (retval < 0) {
1315                 err("Failed to unreset");
1316                 return retval;
1317         }
1318 
1319         netdev_dbg(upriv->dev, "sending control message\n");
1320         retval = usb_control_msg(upriv->udev,
1321                                  usb_sndctrlpipe(upriv->udev, 0),
1322                                  EZUSB_REQUEST_TRIGER,
1323                                  USB_TYPE_VENDOR | USB_RECIP_DEVICE |
1324                                  USB_DIR_OUT, 0x0, 0x0, NULL, 0,
1325                                  DEF_TIMEOUT);
1326         if (retval < 0) {
1327                 err("EZUSB_REQUEST_TRIGER failed retval %d", retval);
1328                 return retval;
1329         }
1330 #if 0
1331         dbg("Sending EZUSB_REQUEST_TRIG_AC");
1332         retval = usb_control_msg(upriv->udev,
1333                                  usb_sndctrlpipe(upriv->udev, 0),
1334                                  EZUSB_REQUEST_TRIG_AC,
1335                                  USB_TYPE_VENDOR | USB_RECIP_DEVICE |
1336                                  USB_DIR_OUT, 0x00FA, 0x0, NULL, 0,
1337                                  DEF_TIMEOUT);
1338         if (retval < 0) {
1339                 err("EZUSB_REQUEST_TRIG_AC failed retval %d", retval);
1340                 return retval;
1341         }
1342 #endif
1343 
1344         return 0;
1345 }
1346 
1347 
1348 static int ezusb_init(struct hermes *hw)
1349 {
1350         struct ezusb_priv *upriv = hw->priv;
1351         int retval;
1352 
1353         BUG_ON(in_interrupt());
1354         BUG_ON(!upriv);
1355 
1356         upriv->reply_count = 0;
1357         /* Write the MAGIC number on the simulated registers to keep
1358          * orinoco.c happy */
1359         hermes_write_regn(hw, SWSUPPORT0, HERMES_MAGIC);
1360         hermes_write_regn(hw, RXFID, EZUSB_RID_RX);
1361 
1362         usb_kill_urb(upriv->read_urb);
1363         ezusb_submit_in_urb(upriv);
1364 
1365         retval = ezusb_write_ltv(hw, 0, EZUSB_RID_INIT1,
1366                                  HERMES_BYTES_TO_RECLEN(2), "\x10\x00");
1367         if (retval < 0) {
1368                 printk(KERN_ERR PFX "EZUSB_RID_INIT1 error %d\n", retval);
1369                 return retval;
1370         }
1371 
1372         retval = ezusb_docmd_wait(hw, HERMES_CMD_INIT, 0, NULL);
1373         if (retval < 0) {
1374                 printk(KERN_ERR PFX "HERMES_CMD_INIT error %d\n", retval);
1375                 return retval;
1376         }
1377 
1378         return 0;
1379 }
1380 
1381 static void ezusb_bulk_in_callback(struct urb *urb)
1382 {
1383         struct ezusb_priv *upriv = (struct ezusb_priv *) urb->context;
1384         struct ezusb_packet *ans = urb->transfer_buffer;
1385         u16 crc;
1386         u16 hermes_rid;
1387 
1388         if (upriv->udev == NULL)
1389                 return;
1390 
1391         if (urb->status == -ETIMEDOUT) {
1392                 /* When a device gets unplugged we get this every time
1393                  * we resubmit, flooding the logs.  Since we don't use
1394                  * USB timeouts, it shouldn't happen any other time*/
1395                 pr_warn("%s: urb timed out, not resubmitting\n", __func__);
1396                 return;
1397         }
1398         if (urb->status == -ECONNABORTED) {
1399                 pr_warn("%s: connection abort, resubmitting urb\n",
1400                         __func__);
1401                 goto resubmit;
1402         }
1403         if ((urb->status == -EILSEQ)
1404             || (urb->status == -ENOENT)
1405             || (urb->status == -ECONNRESET)) {
1406                 netdev_dbg(upriv->dev, "status %d, not resubmiting\n",
1407                            urb->status);
1408                 return;
1409         }
1410         if (urb->status)
1411                 netdev_dbg(upriv->dev, "status: %d length: %d\n",
1412                            urb->status, urb->actual_length);
1413         if (urb->actual_length < sizeof(*ans)) {
1414                 err("%s: short read, ignoring", __func__);
1415                 goto resubmit;
1416         }
1417         crc = build_crc(ans);
1418         if (le16_to_cpu(ans->crc) != crc) {
1419                 err("CRC error, ignoring packet");
1420                 goto resubmit;
1421         }
1422 
1423         hermes_rid = le16_to_cpu(ans->hermes_rid);
1424         if ((hermes_rid != EZUSB_RID_RX) && !EZUSB_IS_INFO(hermes_rid)) {
1425                 ezusb_request_in_callback(upriv, urb);
1426         } else if (upriv->dev) {
1427                 struct net_device *dev = upriv->dev;
1428                 struct orinoco_private *priv = ndev_priv(dev);
1429                 struct hermes *hw = &priv->hw;
1430 
1431                 if (hermes_rid == EZUSB_RID_RX) {
1432                         __orinoco_ev_rx(dev, hw);
1433                 } else {
1434                         hermes_write_regn(hw, INFOFID,
1435                                           le16_to_cpu(ans->hermes_rid));
1436                         __orinoco_ev_info(dev, hw);
1437                 }
1438         }
1439 
1440  resubmit:
1441         if (upriv->udev)
1442                 ezusb_submit_in_urb(upriv);
1443 }
1444 
1445 static inline void ezusb_delete(struct ezusb_priv *upriv)
1446 {
1447         struct net_device *dev;
1448         struct list_head *item;
1449         struct list_head *tmp_item;
1450         unsigned long flags;
1451 
1452         BUG_ON(in_interrupt());
1453         BUG_ON(!upriv);
1454 
1455         dev = upriv->dev;
1456         mutex_lock(&upriv->mtx);
1457 
1458         upriv->udev = NULL;     /* No timer will be rearmed from here */
1459 
1460         usb_kill_urb(upriv->read_urb);
1461 
1462         spin_lock_irqsave(&upriv->req_lock, flags);
1463         list_for_each_safe(item, tmp_item, &upriv->req_active) {
1464                 struct request_context *ctx;
1465                 int err;
1466 
1467                 ctx = list_entry(item, struct request_context, list);
1468                 atomic_inc(&ctx->refcount);
1469 
1470                 ctx->outurb->transfer_flags |= URB_ASYNC_UNLINK;
1471                 err = usb_unlink_urb(ctx->outurb);
1472 
1473                 spin_unlock_irqrestore(&upriv->req_lock, flags);
1474                 if (err == -EINPROGRESS)
1475                         wait_for_completion(&ctx->done);
1476 
1477                 del_timer_sync(&ctx->timer);
1478                 /* FIXME: there is an slight chance for the irq handler to
1479                  * be running */
1480                 if (!list_empty(&ctx->list))
1481                         ezusb_ctx_complete(ctx);
1482 
1483                 ezusb_request_context_put(ctx);
1484                 spin_lock_irqsave(&upriv->req_lock, flags);
1485         }
1486         spin_unlock_irqrestore(&upriv->req_lock, flags);
1487 
1488         list_for_each_safe(item, tmp_item, &upriv->req_pending)
1489             ezusb_ctx_complete(list_entry(item,
1490                                           struct request_context, list));
1491 
1492         if (upriv->read_urb && upriv->read_urb->status == -EINPROGRESS)
1493                 printk(KERN_ERR PFX "Some URB in progress\n");
1494 
1495         mutex_unlock(&upriv->mtx);
1496 
1497         if (upriv->read_urb) {
1498                 kfree(upriv->read_urb->transfer_buffer);
1499                 usb_free_urb(upriv->read_urb);
1500         }
1501         kfree(upriv->bap_buf);
1502         if (upriv->dev) {
1503                 struct orinoco_private *priv = ndev_priv(upriv->dev);
1504                 orinoco_if_del(priv);
1505                 free_orinocodev(priv);
1506         }
1507 }
1508 
1509 static void ezusb_lock_irqsave(spinlock_t *lock,
1510                                unsigned long *flags) __acquires(lock)
1511 {
1512         spin_lock_bh(lock);
1513 }
1514 
1515 static void ezusb_unlock_irqrestore(spinlock_t *lock,
1516                                     unsigned long *flags) __releases(lock)
1517 {
1518         spin_unlock_bh(lock);
1519 }
1520 
1521 static void ezusb_lock_irq(spinlock_t *lock) __acquires(lock)
1522 {
1523         spin_lock_bh(lock);
1524 }
1525 
1526 static void ezusb_unlock_irq(spinlock_t *lock) __releases(lock)
1527 {
1528         spin_unlock_bh(lock);
1529 }
1530 
1531 static const struct hermes_ops ezusb_ops = {
1532         .init = ezusb_init,
1533         .cmd_wait = ezusb_docmd_wait,
1534         .init_cmd_wait = ezusb_doicmd_wait,
1535         .allocate = ezusb_allocate,
1536         .read_ltv = ezusb_read_ltv,
1537         .write_ltv = ezusb_write_ltv,
1538         .bap_pread = ezusb_bap_pread,
1539         .read_pda = ezusb_read_pda,
1540         .program_init = ezusb_program_init,
1541         .program_end = ezusb_program_end,
1542         .program = ezusb_program,
1543         .lock_irqsave = ezusb_lock_irqsave,
1544         .unlock_irqrestore = ezusb_unlock_irqrestore,
1545         .lock_irq = ezusb_lock_irq,
1546         .unlock_irq = ezusb_unlock_irq,
1547 };
1548 
1549 static const struct net_device_ops ezusb_netdev_ops = {
1550         .ndo_open               = orinoco_open,
1551         .ndo_stop               = orinoco_stop,
1552         .ndo_start_xmit         = ezusb_xmit,
1553         .ndo_set_rx_mode        = orinoco_set_multicast_list,
1554         .ndo_change_mtu         = orinoco_change_mtu,
1555         .ndo_set_mac_address    = eth_mac_addr,
1556         .ndo_validate_addr      = eth_validate_addr,
1557         .ndo_tx_timeout         = orinoco_tx_timeout,
1558         .ndo_get_stats          = orinoco_get_stats,
1559 };
1560 
1561 static int ezusb_probe(struct usb_interface *interface,
1562                        const struct usb_device_id *id)
1563 {
1564         struct usb_device *udev = interface_to_usbdev(interface);
1565         struct orinoco_private *priv;
1566         struct hermes *hw;
1567         struct ezusb_priv *upriv = NULL;
1568         struct usb_interface_descriptor *iface_desc;
1569         struct usb_endpoint_descriptor *ep;
1570         const struct firmware *fw_entry = NULL;
1571         int retval = 0;
1572         int i;
1573 
1574         priv = alloc_orinocodev(sizeof(*upriv), &udev->dev,
1575                                 ezusb_hard_reset, NULL);
1576         if (!priv) {
1577                 err("Couldn't allocate orinocodev");
1578                 goto exit;
1579         }
1580 
1581         hw = &priv->hw;
1582 
1583         upriv = priv->card;
1584 
1585         mutex_init(&upriv->mtx);
1586         spin_lock_init(&upriv->reply_count_lock);
1587 
1588         spin_lock_init(&upriv->req_lock);
1589         INIT_LIST_HEAD(&upriv->req_pending);
1590         INIT_LIST_HEAD(&upriv->req_active);
1591 
1592         upriv->udev = udev;
1593 
1594         hw->iobase = (void __force __iomem *) &upriv->hermes_reg_fake;
1595         hw->reg_spacing = HERMES_16BIT_REGSPACING;
1596         hw->priv = upriv;
1597         hw->ops = &ezusb_ops;
1598 
1599         /* set up the endpoint information */
1600         /* check out the endpoints */
1601 
1602         iface_desc = &interface->altsetting[0].desc;
1603         for (i = 0; i < iface_desc->bNumEndpoints; ++i) {
1604                 ep = &interface->altsetting[0].endpoint[i].desc;
1605 
1606                 if (usb_endpoint_is_bulk_in(ep)) {
1607                         /* we found a bulk in endpoint */
1608                         if (upriv->read_urb != NULL) {
1609                                 pr_warn("Found a second bulk in ep, ignored\n");
1610                                 continue;
1611                         }
1612 
1613                         upriv->read_urb = usb_alloc_urb(0, GFP_KERNEL);
1614                         if (!upriv->read_urb) {
1615                                 err("No free urbs available");
1616                                 goto error;
1617                         }
1618                         if (le16_to_cpu(ep->wMaxPacketSize) != 64)
1619                                 pr_warn("bulk in: wMaxPacketSize!= 64\n");
1620                         if (ep->bEndpointAddress != (2 | USB_DIR_IN))
1621                                 pr_warn("bulk in: bEndpointAddress: %d\n",
1622                                         ep->bEndpointAddress);
1623                         upriv->read_pipe = usb_rcvbulkpipe(udev,
1624                                                          ep->
1625                                                          bEndpointAddress);
1626                         upriv->read_urb->transfer_buffer =
1627                             kmalloc(BULK_BUF_SIZE, GFP_KERNEL);
1628                         if (!upriv->read_urb->transfer_buffer) {
1629                                 err("Couldn't allocate IN buffer");
1630                                 goto error;
1631                         }
1632                 }
1633 
1634                 if (usb_endpoint_is_bulk_out(ep)) {
1635                         /* we found a bulk out endpoint */
1636                         if (upriv->bap_buf != NULL) {
1637                                 pr_warn("Found a second bulk out ep, ignored\n");
1638                                 continue;
1639                         }
1640 
1641                         if (le16_to_cpu(ep->wMaxPacketSize) != 64)
1642                                 pr_warn("bulk out: wMaxPacketSize != 64\n");
1643                         if (ep->bEndpointAddress != 2)
1644                                 pr_warn("bulk out: bEndpointAddress: %d\n",
1645                                         ep->bEndpointAddress);
1646                         upriv->write_pipe = usb_sndbulkpipe(udev,
1647                                                           ep->
1648                                                           bEndpointAddress);
1649                         upriv->bap_buf = kmalloc(BULK_BUF_SIZE, GFP_KERNEL);
1650                         if (!upriv->bap_buf) {
1651                                 err("Couldn't allocate bulk_out_buffer");
1652                                 goto error;
1653                         }
1654                 }
1655         }
1656         if (!upriv->bap_buf || !upriv->read_urb) {
1657                 err("Didn't find the required bulk endpoints");
1658                 goto error;
1659         }
1660 
1661         if (request_firmware(&fw_entry, "orinoco_ezusb_fw",
1662                              &interface->dev) == 0) {
1663                 firmware.size = fw_entry->size;
1664                 firmware.code = fw_entry->data;
1665         }
1666         if (firmware.size && firmware.code) {
1667                 if (ezusb_firmware_download(upriv, &firmware) < 0)
1668                         goto error;
1669         } else {
1670                 err("No firmware to download");
1671                 goto error;
1672         }
1673 
1674         if (ezusb_hard_reset(priv) < 0) {
1675                 err("Cannot reset the device");
1676                 goto error;
1677         }
1678 
1679         /* If the firmware is already downloaded orinoco.c will call
1680          * ezusb_init but if the firmware is not already there, that will make
1681          * the kernel very unstable, so we try initializing here and quit in
1682          * case of error */
1683         if (ezusb_init(hw) < 0) {
1684                 err("Couldn't initialize the device");
1685                 err("Firmware may not be downloaded or may be wrong.");
1686                 goto error;
1687         }
1688 
1689         /* Initialise the main driver */
1690         if (orinoco_init(priv) != 0) {
1691                 err("orinoco_init() failed\n");
1692                 goto error;
1693         }
1694 
1695         if (orinoco_if_add(priv, 0, 0, &ezusb_netdev_ops) != 0) {
1696                 upriv->dev = NULL;
1697                 err("%s: orinoco_if_add() failed", __func__);
1698                 goto error;
1699         }
1700         upriv->dev = priv->ndev;
1701 
1702         goto exit;
1703 
1704  error:
1705         ezusb_delete(upriv);
1706         if (upriv->dev) {
1707                 /* upriv->dev was 0, so ezusb_delete() didn't free it */
1708                 free_orinocodev(priv);
1709         }
1710         upriv = NULL;
1711         retval = -EFAULT;
1712  exit:
1713         if (fw_entry) {
1714                 firmware.code = NULL;
1715                 firmware.size = 0;
1716                 release_firmware(fw_entry);
1717         }
1718         usb_set_intfdata(interface, upriv);
1719         return retval;
1720 }
1721 
1722 
1723 static void ezusb_disconnect(struct usb_interface *intf)
1724 {
1725         struct ezusb_priv *upriv = usb_get_intfdata(intf);
1726         usb_set_intfdata(intf, NULL);
1727         ezusb_delete(upriv);
1728         printk(KERN_INFO PFX "Disconnected\n");
1729 }
1730 
1731 
1732 /* usb specific object needed to register this driver with the usb subsystem */
1733 static struct usb_driver orinoco_driver = {
1734         .name = DRIVER_NAME,
1735         .probe = ezusb_probe,
1736         .disconnect = ezusb_disconnect,
1737         .id_table = ezusb_table,
1738         .disable_hub_initiated_lpm = 1,
1739 };
1740 
1741 module_usb_driver(orinoco_driver);
1742 
1743 MODULE_AUTHOR("Manuel Estrada Sainz");
1744 MODULE_DESCRIPTION("Driver for Orinoco wireless LAN cards using EZUSB bridge");
1745 MODULE_LICENSE("Dual MPL/GPL");
1746 

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