Version:  2.0.40 2.2.26 2.4.37 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15

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 #ifdef CONFIG_USB_DEBUG
104 static int debug = 1;
105 #else
106 static int debug;
107 #endif
108 
109 /* Debugging macros */
110 #undef dbg
111 #define dbg(format, arg...) \
112         do { if (debug) printk(KERN_DEBUG PFX "%s: " format "\n", \
113                                __func__ , ## arg); } while (0)
114 #undef err
115 #define err(format, arg...) \
116         do { printk(KERN_ERR PFX format "\n", ## arg); } while (0)
117 
118 /* Module paramaters */
119 module_param(debug, int, 0644);
120 MODULE_PARM_DESC(debug, "Debug enabled or not");
121 
122 MODULE_FIRMWARE("orinoco_ezusb_fw");
123 
124 /*
125  * Under some conditions, the card gets stuck and stops paying attention
126  * to the world (i.e. data communication stalls) until we do something to
127  * it.  Sending an INQ_TALLIES command seems to be enough and should be
128  * harmless otherwise.  This behaviour has been observed when using the
129  * driver on a systemimager client during installation.  In the past a
130  * timer was used to send INQ_TALLIES commands when there was no other
131  * activity, but it was troublesome and was removed.
132  */
133 
134 #define USB_COMPAQ_VENDOR_ID     0x049f /* Compaq Computer Corp. */
135 #define USB_COMPAQ_WL215_ID      0x001f /* Compaq WL215 USB Adapter */
136 #define USB_COMPAQ_W200_ID       0x0076 /* Compaq W200 USB Adapter */
137 #define USB_HP_WL215_ID          0x0082 /* Compaq WL215 USB Adapter */
138 
139 #define USB_MELCO_VENDOR_ID      0x0411
140 #define USB_BUFFALO_L11_ID       0x0006 /* BUFFALO WLI-USB-L11 */
141 #define USB_BUFFALO_L11G_WR_ID   0x000B /* BUFFALO WLI-USB-L11G-WR */
142 #define USB_BUFFALO_L11G_ID      0x000D /* BUFFALO WLI-USB-L11G */
143 
144 #define USB_LUCENT_VENDOR_ID     0x047E /* Lucent Technologies */
145 #define USB_LUCENT_ORINOCO_ID    0x0300 /* Lucent/Agere Orinoco USB Client */
146 
147 #define USB_AVAYA8_VENDOR_ID     0x0D98
148 #define USB_AVAYAE_VENDOR_ID     0x0D9E
149 #define USB_AVAYA_WIRELESS_ID    0x0300 /* Avaya Wireless USB Card */
150 
151 #define USB_AGERE_VENDOR_ID      0x0D4E /* Agere Systems */
152 #define USB_AGERE_MODEL0801_ID   0x1000 /* Wireless USB Card Model 0801 */
153 #define USB_AGERE_MODEL0802_ID   0x1001 /* Wireless USB Card Model 0802 */
154 #define USB_AGERE_REBRANDED_ID   0x047A /* WLAN USB Card */
155 
156 #define USB_ELSA_VENDOR_ID       0x05CC
157 #define USB_ELSA_AIRLANCER_ID    0x3100 /* ELSA AirLancer USB-11 */
158 
159 #define USB_LEGEND_VENDOR_ID     0x0E7C
160 #define USB_LEGEND_JOYNET_ID     0x0300 /* Joynet WLAN USB Card */
161 
162 #define USB_SAMSUNG_VENDOR_ID    0x04E8
163 #define USB_SAMSUNG_SEW2001U1_ID 0x5002 /* Samsung SEW-2001u Card */
164 #define USB_SAMSUNG_SEW2001U2_ID 0x5B11 /* Samsung SEW-2001u Card */
165 #define USB_SAMSUNG_SEW2003U_ID  0x7011 /* Samsung SEW-2003U Card */
166 
167 #define USB_IGATE_VENDOR_ID      0x0681
168 #define USB_IGATE_IGATE_11M_ID   0x0012 /* I-GATE 11M USB Card */
169 
170 #define USB_FUJITSU_VENDOR_ID    0x0BF8
171 #define USB_FUJITSU_E1100_ID     0x1002 /* connect2AIR WLAN E-1100 USB */
172 
173 #define USB_2WIRE_VENDOR_ID      0x1630
174 #define USB_2WIRE_WIRELESS_ID    0xff81 /* 2Wire Wireless USB adapter */
175 
176 
177 #define EZUSB_REQUEST_FW_TRANS          0xA0
178 #define EZUSB_REQUEST_TRIGER            0xAA
179 #define EZUSB_REQUEST_TRIG_AC           0xAC
180 #define EZUSB_CPUCS_REG                 0x7F92
181 
182 #define EZUSB_RID_TX                    0x0700
183 #define EZUSB_RID_RX                    0x0701
184 #define EZUSB_RID_INIT1                 0x0702
185 #define EZUSB_RID_ACK                   0x0710
186 #define EZUSB_RID_READ_PDA              0x0800
187 #define EZUSB_RID_PROG_INIT             0x0852
188 #define EZUSB_RID_PROG_SET_ADDR         0x0853
189 #define EZUSB_RID_PROG_BYTES            0x0854
190 #define EZUSB_RID_PROG_END              0x0855
191 #define EZUSB_RID_DOCMD                 0x0860
192 
193 /* Recognize info frames */
194 #define EZUSB_IS_INFO(id)               ((id >= 0xF000) && (id <= 0xF2FF))
195 
196 #define EZUSB_MAGIC                     0x0210
197 
198 #define EZUSB_FRAME_DATA                1
199 #define EZUSB_FRAME_CONTROL             2
200 
201 #define DEF_TIMEOUT                     (3 * HZ)
202 
203 #define BULK_BUF_SIZE                   2048
204 
205 #define MAX_DL_SIZE (BULK_BUF_SIZE - sizeof(struct ezusb_packet))
206 
207 #define FW_BUF_SIZE                     64
208 #define FW_VAR_OFFSET_PTR               0x359
209 #define FW_VAR_VALUE                    0
210 #define FW_HOLE_START                   0x100
211 #define FW_HOLE_END                     0x300
212 
213 struct ezusb_packet {
214         __le16 magic;           /* 0x0210 */
215         u8 req_reply_count;
216         u8 ans_reply_count;
217         __le16 frame_type;      /* 0x01 for data frames, 0x02 otherwise */
218         __le16 size;            /* transport size */
219         __le16 crc;             /* CRC up to here */
220         __le16 hermes_len;
221         __le16 hermes_rid;
222         u8 data[0];
223 } __packed;
224 
225 /* Table of devices that work or may work with this driver */
226 static struct usb_device_id ezusb_table[] = {
227         {USB_DEVICE(USB_COMPAQ_VENDOR_ID, USB_COMPAQ_WL215_ID)},
228         {USB_DEVICE(USB_COMPAQ_VENDOR_ID, USB_HP_WL215_ID)},
229         {USB_DEVICE(USB_COMPAQ_VENDOR_ID, USB_COMPAQ_W200_ID)},
230         {USB_DEVICE(USB_MELCO_VENDOR_ID, USB_BUFFALO_L11_ID)},
231         {USB_DEVICE(USB_MELCO_VENDOR_ID, USB_BUFFALO_L11G_WR_ID)},
232         {USB_DEVICE(USB_MELCO_VENDOR_ID, USB_BUFFALO_L11G_ID)},
233         {USB_DEVICE(USB_LUCENT_VENDOR_ID, USB_LUCENT_ORINOCO_ID)},
234         {USB_DEVICE(USB_AVAYA8_VENDOR_ID, USB_AVAYA_WIRELESS_ID)},
235         {USB_DEVICE(USB_AVAYAE_VENDOR_ID, USB_AVAYA_WIRELESS_ID)},
236         {USB_DEVICE(USB_AGERE_VENDOR_ID, USB_AGERE_MODEL0801_ID)},
237         {USB_DEVICE(USB_AGERE_VENDOR_ID, USB_AGERE_MODEL0802_ID)},
238         {USB_DEVICE(USB_ELSA_VENDOR_ID, USB_ELSA_AIRLANCER_ID)},
239         {USB_DEVICE(USB_LEGEND_VENDOR_ID, USB_LEGEND_JOYNET_ID)},
240         {USB_DEVICE_VER(USB_SAMSUNG_VENDOR_ID, USB_SAMSUNG_SEW2001U1_ID,
241                         0, 0)},
242         {USB_DEVICE(USB_SAMSUNG_VENDOR_ID, USB_SAMSUNG_SEW2001U2_ID)},
243         {USB_DEVICE(USB_SAMSUNG_VENDOR_ID, USB_SAMSUNG_SEW2003U_ID)},
244         {USB_DEVICE(USB_IGATE_VENDOR_ID, USB_IGATE_IGATE_11M_ID)},
245         {USB_DEVICE(USB_FUJITSU_VENDOR_ID, USB_FUJITSU_E1100_ID)},
246         {USB_DEVICE(USB_2WIRE_VENDOR_ID, USB_2WIRE_WIRELESS_ID)},
247         {USB_DEVICE(USB_AGERE_VENDOR_ID, USB_AGERE_REBRANDED_ID)},
248         {}                      /* Terminating entry */
249 };
250 
251 MODULE_DEVICE_TABLE(usb, ezusb_table);
252 
253 /* Structure to hold all of our device specific stuff */
254 struct ezusb_priv {
255         struct usb_device *udev;
256         struct net_device *dev;
257         struct mutex mtx;
258         spinlock_t req_lock;
259         struct list_head req_pending;
260         struct list_head req_active;
261         spinlock_t reply_count_lock;
262         u16 hermes_reg_fake[0x40];
263         u8 *bap_buf;
264         struct urb *read_urb;
265         int read_pipe;
266         int write_pipe;
267         u8 reply_count;
268 };
269 
270 enum ezusb_state {
271         EZUSB_CTX_START,
272         EZUSB_CTX_QUEUED,
273         EZUSB_CTX_REQ_SUBMITTED,
274         EZUSB_CTX_REQ_COMPLETE,
275         EZUSB_CTX_RESP_RECEIVED,
276         EZUSB_CTX_REQ_TIMEOUT,
277         EZUSB_CTX_REQ_FAILED,
278         EZUSB_CTX_RESP_TIMEOUT,
279         EZUSB_CTX_REQSUBMIT_FAIL,
280         EZUSB_CTX_COMPLETE,
281 };
282 
283 struct request_context {
284         struct list_head list;
285         atomic_t refcount;
286         struct completion done; /* Signals that CTX is dead */
287         int killed;
288         struct urb *outurb;     /* OUT for req pkt */
289         struct ezusb_priv *upriv;
290         struct ezusb_packet *buf;
291         int buf_length;
292         struct timer_list timer;        /* Timeout handling */
293         enum ezusb_state state; /* Current state */
294         /* the RID that we will wait for */
295         u16 out_rid;
296         u16 in_rid;
297 };
298 
299 
300 /* Forward declarations */
301 static void ezusb_ctx_complete(struct request_context *ctx);
302 static void ezusb_req_queue_run(struct ezusb_priv *upriv);
303 static void ezusb_bulk_in_callback(struct urb *urb);
304 
305 static inline u8 ezusb_reply_inc(u8 count)
306 {
307         if (count < 0x7F)
308                 return count + 1;
309         else
310                 return 1;
311 }
312 
313 static void ezusb_request_context_put(struct request_context *ctx)
314 {
315         if (!atomic_dec_and_test(&ctx->refcount))
316                 return;
317 
318         WARN_ON(!ctx->done.done);
319         BUG_ON(ctx->outurb->status == -EINPROGRESS);
320         BUG_ON(timer_pending(&ctx->timer));
321         usb_free_urb(ctx->outurb);
322         kfree(ctx->buf);
323         kfree(ctx);
324 }
325 
326 static inline void ezusb_mod_timer(struct ezusb_priv *upriv,
327                                    struct timer_list *timer,
328                                    unsigned long expire)
329 {
330         if (!upriv->udev)
331                 return;
332         mod_timer(timer, expire);
333 }
334 
335 static void ezusb_request_timerfn(u_long _ctx)
336 {
337         struct request_context *ctx = (void *) _ctx;
338 
339         ctx->outurb->transfer_flags |= URB_ASYNC_UNLINK;
340         if (usb_unlink_urb(ctx->outurb) == -EINPROGRESS) {
341                 ctx->state = EZUSB_CTX_REQ_TIMEOUT;
342         } else {
343                 ctx->state = EZUSB_CTX_RESP_TIMEOUT;
344                 dbg("couldn't unlink");
345                 atomic_inc(&ctx->refcount);
346                 ctx->killed = 1;
347                 ezusb_ctx_complete(ctx);
348                 ezusb_request_context_put(ctx);
349         }
350 };
351 
352 static struct request_context *ezusb_alloc_ctx(struct ezusb_priv *upriv,
353                                                u16 out_rid, u16 in_rid)
354 {
355         struct request_context *ctx;
356 
357         ctx = kzalloc(sizeof(*ctx), GFP_ATOMIC);
358         if (!ctx)
359                 return NULL;
360 
361         ctx->buf = kmalloc(BULK_BUF_SIZE, GFP_ATOMIC);
362         if (!ctx->buf) {
363                 kfree(ctx);
364                 return NULL;
365         }
366         ctx->outurb = usb_alloc_urb(0, GFP_ATOMIC);
367         if (!ctx->outurb) {
368                 kfree(ctx->buf);
369                 kfree(ctx);
370                 return NULL;
371         }
372 
373         ctx->upriv = upriv;
374         ctx->state = EZUSB_CTX_START;
375         ctx->out_rid = out_rid;
376         ctx->in_rid = in_rid;
377 
378         atomic_set(&ctx->refcount, 1);
379         init_completion(&ctx->done);
380 
381         init_timer(&ctx->timer);
382         ctx->timer.function = ezusb_request_timerfn;
383         ctx->timer.data = (u_long) ctx;
384         return ctx;
385 }
386 
387 
388 /* Hopefully the real complete_all will soon be exported, in the mean
389  * while this should work. */
390 static inline void ezusb_complete_all(struct completion *comp)
391 {
392         complete(comp);
393         complete(comp);
394         complete(comp);
395         complete(comp);
396 }
397 
398 static void ezusb_ctx_complete(struct request_context *ctx)
399 {
400         struct ezusb_priv *upriv = ctx->upriv;
401         unsigned long flags;
402 
403         spin_lock_irqsave(&upriv->req_lock, flags);
404 
405         list_del_init(&ctx->list);
406         if (upriv->udev) {
407                 spin_unlock_irqrestore(&upriv->req_lock, flags);
408                 ezusb_req_queue_run(upriv);
409                 spin_lock_irqsave(&upriv->req_lock, flags);
410         }
411 
412         switch (ctx->state) {
413         case EZUSB_CTX_COMPLETE:
414         case EZUSB_CTX_REQSUBMIT_FAIL:
415         case EZUSB_CTX_REQ_FAILED:
416         case EZUSB_CTX_REQ_TIMEOUT:
417         case EZUSB_CTX_RESP_TIMEOUT:
418                 spin_unlock_irqrestore(&upriv->req_lock, flags);
419 
420                 if ((ctx->out_rid == EZUSB_RID_TX) && upriv->dev) {
421                         struct net_device *dev = upriv->dev;
422                         struct orinoco_private *priv = ndev_priv(dev);
423                         struct net_device_stats *stats = &priv->stats;
424 
425                         if (ctx->state != EZUSB_CTX_COMPLETE)
426                                 stats->tx_errors++;
427                         else
428                                 stats->tx_packets++;
429 
430                         netif_wake_queue(dev);
431                 }
432                 ezusb_complete_all(&ctx->done);
433                 ezusb_request_context_put(ctx);
434                 break;
435 
436         default:
437                 spin_unlock_irqrestore(&upriv->req_lock, flags);
438                 if (!upriv->udev) {
439                         /* This is normal, as all request contexts get flushed
440                          * when the device is disconnected */
441                         err("Called, CTX not terminating, but device gone");
442                         ezusb_complete_all(&ctx->done);
443                         ezusb_request_context_put(ctx);
444                         break;
445                 }
446 
447                 err("Called, CTX not in terminating state.");
448                 /* Things are really bad if this happens. Just leak
449                  * the CTX because it may still be linked to the
450                  * queue or the OUT urb may still be active.
451                  * Just leaking at least prevents an Oops or Panic.
452                  */
453                 break;
454         }
455 }
456 
457 /**
458  * ezusb_req_queue_run:
459  * Description:
460  *      Note: Only one active CTX at any one time, because there's no
461  *      other (reliable) way to match the response URB to the correct
462  *      CTX.
463  **/
464 static void ezusb_req_queue_run(struct ezusb_priv *upriv)
465 {
466         unsigned long flags;
467         struct request_context *ctx;
468         int result;
469 
470         spin_lock_irqsave(&upriv->req_lock, flags);
471 
472         if (!list_empty(&upriv->req_active))
473                 goto unlock;
474 
475         if (list_empty(&upriv->req_pending))
476                 goto unlock;
477 
478         ctx =
479             list_entry(upriv->req_pending.next, struct request_context,
480                        list);
481 
482         if (!ctx->upriv->udev)
483                 goto unlock;
484 
485         /* We need to split this off to avoid a race condition */
486         list_move_tail(&ctx->list, &upriv->req_active);
487 
488         if (ctx->state == EZUSB_CTX_QUEUED) {
489                 atomic_inc(&ctx->refcount);
490                 result = usb_submit_urb(ctx->outurb, GFP_ATOMIC);
491                 if (result) {
492                         ctx->state = EZUSB_CTX_REQSUBMIT_FAIL;
493 
494                         spin_unlock_irqrestore(&upriv->req_lock, flags);
495 
496                         err("Fatal, failed to submit command urb."
497                             " error=%d\n", result);
498 
499                         ezusb_ctx_complete(ctx);
500                         ezusb_request_context_put(ctx);
501                         goto done;
502                 }
503 
504                 ctx->state = EZUSB_CTX_REQ_SUBMITTED;
505                 ezusb_mod_timer(ctx->upriv, &ctx->timer,
506                                 jiffies + DEF_TIMEOUT);
507         }
508 
509  unlock:
510         spin_unlock_irqrestore(&upriv->req_lock, flags);
511 
512  done:
513         return;
514 }
515 
516 static void ezusb_req_enqueue_run(struct ezusb_priv *upriv,
517                                   struct request_context *ctx)
518 {
519         unsigned long flags;
520 
521         spin_lock_irqsave(&upriv->req_lock, flags);
522 
523         if (!ctx->upriv->udev) {
524                 spin_unlock_irqrestore(&upriv->req_lock, flags);
525                 goto done;
526         }
527         atomic_inc(&ctx->refcount);
528         list_add_tail(&ctx->list, &upriv->req_pending);
529         spin_unlock_irqrestore(&upriv->req_lock, flags);
530 
531         ctx->state = EZUSB_CTX_QUEUED;
532         ezusb_req_queue_run(upriv);
533 
534  done:
535         return;
536 }
537 
538 static void ezusb_request_out_callback(struct urb *urb)
539 {
540         unsigned long flags;
541         enum ezusb_state state;
542         struct request_context *ctx = urb->context;
543         struct ezusb_priv *upriv = ctx->upriv;
544 
545         spin_lock_irqsave(&upriv->req_lock, flags);
546 
547         del_timer(&ctx->timer);
548 
549         if (ctx->killed) {
550                 spin_unlock_irqrestore(&upriv->req_lock, flags);
551                 pr_warning("interrupt called with dead ctx");
552                 goto out;
553         }
554 
555         state = ctx->state;
556 
557         if (urb->status == 0) {
558                 switch (state) {
559                 case EZUSB_CTX_REQ_SUBMITTED:
560                         if (ctx->in_rid) {
561                                 ctx->state = EZUSB_CTX_REQ_COMPLETE;
562                                 /* reply URB still pending */
563                                 ezusb_mod_timer(upriv, &ctx->timer,
564                                                 jiffies + DEF_TIMEOUT);
565                                 spin_unlock_irqrestore(&upriv->req_lock,
566                                                        flags);
567                                 break;
568                         }
569                         /* fall through */
570                 case EZUSB_CTX_RESP_RECEIVED:
571                         /* IN already received before this OUT-ACK */
572                         ctx->state = EZUSB_CTX_COMPLETE;
573                         spin_unlock_irqrestore(&upriv->req_lock, flags);
574                         ezusb_ctx_complete(ctx);
575                         break;
576 
577                 default:
578                         spin_unlock_irqrestore(&upriv->req_lock, flags);
579                         err("Unexpected state(0x%x, %d) in OUT URB",
580                             state, urb->status);
581                         break;
582                 }
583         } else {
584                 /* If someone cancels the OUT URB then its status
585                  * should be either -ECONNRESET or -ENOENT.
586                  */
587                 switch (state) {
588                 case EZUSB_CTX_REQ_SUBMITTED:
589                 case EZUSB_CTX_RESP_RECEIVED:
590                         ctx->state = EZUSB_CTX_REQ_FAILED;
591                         /* fall through */
592 
593                 case EZUSB_CTX_REQ_FAILED:
594                 case EZUSB_CTX_REQ_TIMEOUT:
595                         spin_unlock_irqrestore(&upriv->req_lock, flags);
596 
597                         ezusb_ctx_complete(ctx);
598                         break;
599 
600                 default:
601                         spin_unlock_irqrestore(&upriv->req_lock, flags);
602 
603                         err("Unexpected state(0x%x, %d) in OUT URB",
604                             state, urb->status);
605                         break;
606                 }
607         }
608  out:
609         ezusb_request_context_put(ctx);
610 }
611 
612 static void ezusb_request_in_callback(struct ezusb_priv *upriv,
613                                       struct urb *urb)
614 {
615         struct ezusb_packet *ans = urb->transfer_buffer;
616         struct request_context *ctx = NULL;
617         enum ezusb_state state;
618         unsigned long flags;
619 
620         /* Find the CTX on the active queue that requested this URB */
621         spin_lock_irqsave(&upriv->req_lock, flags);
622         if (upriv->udev) {
623                 struct list_head *item;
624 
625                 list_for_each(item, &upriv->req_active) {
626                         struct request_context *c;
627                         int reply_count;
628 
629                         c = list_entry(item, struct request_context, list);
630                         reply_count =
631                             ezusb_reply_inc(c->buf->req_reply_count);
632                         if ((ans->ans_reply_count == reply_count)
633                             && (le16_to_cpu(ans->hermes_rid) == c->in_rid)) {
634                                 ctx = c;
635                                 break;
636                         }
637                         dbg("Skipped (0x%x/0x%x) (%d/%d)",
638                             le16_to_cpu(ans->hermes_rid),
639                             c->in_rid, ans->ans_reply_count, reply_count);
640                 }
641         }
642 
643         if (ctx == NULL) {
644                 spin_unlock_irqrestore(&upriv->req_lock, flags);
645                 err("%s: got unexpected RID: 0x%04X", __func__,
646                     le16_to_cpu(ans->hermes_rid));
647                 ezusb_req_queue_run(upriv);
648                 return;
649         }
650 
651         /* The data we want is in the in buffer, exchange */
652         urb->transfer_buffer = ctx->buf;
653         ctx->buf = (void *) ans;
654         ctx->buf_length = urb->actual_length;
655 
656         state = ctx->state;
657         switch (state) {
658         case EZUSB_CTX_REQ_SUBMITTED:
659                 /* We have received our response URB before
660                  * our request has been acknowledged. Do NOT
661                  * destroy our CTX yet, because our OUT URB
662                  * is still alive ...
663                  */
664                 ctx->state = EZUSB_CTX_RESP_RECEIVED;
665                 spin_unlock_irqrestore(&upriv->req_lock, flags);
666 
667                 /* Let the machine continue running. */
668                 break;
669 
670         case EZUSB_CTX_REQ_COMPLETE:
671                 /* This is the usual path: our request
672                  * has already been acknowledged, and
673                  * we have now received the reply.
674                  */
675                 ctx->state = EZUSB_CTX_COMPLETE;
676 
677                 /* Stop the intimer */
678                 del_timer(&ctx->timer);
679                 spin_unlock_irqrestore(&upriv->req_lock, flags);
680 
681                 /* Call the completion handler */
682                 ezusb_ctx_complete(ctx);
683                 break;
684 
685         default:
686                 spin_unlock_irqrestore(&upriv->req_lock, flags);
687 
688                 pr_warning("Matched IN URB, unexpected context state(0x%x)",
689                      state);
690                 /* Throw this CTX away and try submitting another */
691                 del_timer(&ctx->timer);
692                 ctx->outurb->transfer_flags |= URB_ASYNC_UNLINK;
693                 usb_unlink_urb(ctx->outurb);
694                 ezusb_req_queue_run(upriv);
695                 break;
696         }                       /* switch */
697 }
698 
699 
700 static void ezusb_req_ctx_wait(struct ezusb_priv *upriv,
701                                struct request_context *ctx)
702 {
703         switch (ctx->state) {
704         case EZUSB_CTX_QUEUED:
705         case EZUSB_CTX_REQ_SUBMITTED:
706         case EZUSB_CTX_REQ_COMPLETE:
707         case EZUSB_CTX_RESP_RECEIVED:
708                 if (in_softirq()) {
709                         /* If we get called from a timer, timeout timers don't
710                          * get the chance to run themselves. So we make sure
711                          * that we don't sleep for ever */
712                         int msecs = DEF_TIMEOUT * (1000 / HZ);
713                         while (!ctx->done.done && msecs--)
714                                 udelay(1000);
715                 } else {
716                         wait_event_interruptible(ctx->done.wait,
717                                                  ctx->done.done);
718                 }
719                 break;
720         default:
721                 /* Done or failed - nothing to wait for */
722                 break;
723         }
724 }
725 
726 static inline u16 build_crc(struct ezusb_packet *data)
727 {
728         u16 crc = 0;
729         u8 *bytes = (u8 *)data;
730         int i;
731 
732         for (i = 0; i < 8; i++)
733                 crc = (crc << 1) + bytes[i];
734 
735         return crc;
736 }
737 
738 /**
739  * ezusb_fill_req:
740  *
741  * if data == NULL and length > 0 the data is assumed to be already in
742  * the target buffer and only the header is filled.
743  *
744  */
745 static int ezusb_fill_req(struct ezusb_packet *req, u16 length, u16 rid,
746                           const void *data, u16 frame_type, u8 reply_count)
747 {
748         int total_size = sizeof(*req) + length;
749 
750         BUG_ON(total_size > BULK_BUF_SIZE);
751 
752         req->magic = cpu_to_le16(EZUSB_MAGIC);
753         req->req_reply_count = reply_count;
754         req->ans_reply_count = 0;
755         req->frame_type = cpu_to_le16(frame_type);
756         req->size = cpu_to_le16(length + 4);
757         req->crc = cpu_to_le16(build_crc(req));
758         req->hermes_len = cpu_to_le16(HERMES_BYTES_TO_RECLEN(length));
759         req->hermes_rid = cpu_to_le16(rid);
760         if (data)
761                 memcpy(req->data, data, length);
762         return total_size;
763 }
764 
765 static int ezusb_submit_in_urb(struct ezusb_priv *upriv)
766 {
767         int retval = 0;
768         void *cur_buf = upriv->read_urb->transfer_buffer;
769 
770         if (upriv->read_urb->status == -EINPROGRESS) {
771                 dbg("urb busy, not resubmiting");
772                 retval = -EBUSY;
773                 goto exit;
774         }
775         usb_fill_bulk_urb(upriv->read_urb, upriv->udev, upriv->read_pipe,
776                           cur_buf, BULK_BUF_SIZE,
777                           ezusb_bulk_in_callback, upriv);
778         upriv->read_urb->transfer_flags = 0;
779         retval = usb_submit_urb(upriv->read_urb, GFP_ATOMIC);
780         if (retval)
781                 err("%s submit failed %d", __func__, retval);
782 
783  exit:
784         return retval;
785 }
786 
787 static inline int ezusb_8051_cpucs(struct ezusb_priv *upriv, int reset)
788 {
789         u8 res_val = reset;     /* avoid argument promotion */
790 
791         if (!upriv->udev) {
792                 err("%s: !upriv->udev", __func__);
793                 return -EFAULT;
794         }
795         return usb_control_msg(upriv->udev,
796                                usb_sndctrlpipe(upriv->udev, 0),
797                                EZUSB_REQUEST_FW_TRANS,
798                                USB_TYPE_VENDOR | USB_RECIP_DEVICE |
799                                USB_DIR_OUT, EZUSB_CPUCS_REG, 0, &res_val,
800                                sizeof(res_val), DEF_TIMEOUT);
801 }
802 
803 static int ezusb_firmware_download(struct ezusb_priv *upriv,
804                                    struct ez_usb_fw *fw)
805 {
806         u8 *fw_buffer;
807         int retval, addr;
808         int variant_offset;
809 
810         fw_buffer = kmalloc(FW_BUF_SIZE, GFP_KERNEL);
811         if (!fw_buffer) {
812                 printk(KERN_ERR PFX "Out of memory for firmware buffer.\n");
813                 return -ENOMEM;
814         }
815         /*
816          * This byte is 1 and should be replaced with 0.  The offset is
817          * 0x10AD in version 0.0.6.  The byte in question should follow
818          * the end of the code pointed to by the jump in the beginning
819          * of the firmware.  Also, it is read by code located at 0x358.
820          */
821         variant_offset = be16_to_cpup((__be16 *) &fw->code[FW_VAR_OFFSET_PTR]);
822         if (variant_offset >= fw->size) {
823                 printk(KERN_ERR PFX "Invalid firmware variant offset: "
824                        "0x%04x\n", variant_offset);
825                 retval = -EINVAL;
826                 goto fail;
827         }
828 
829         retval = ezusb_8051_cpucs(upriv, 1);
830         if (retval < 0)
831                 goto fail;
832         for (addr = 0; addr < fw->size; addr += FW_BUF_SIZE) {
833                 /* 0x100-0x300 should be left alone, it contains card
834                  * specific data, like USB enumeration information */
835                 if ((addr >= FW_HOLE_START) && (addr < FW_HOLE_END))
836                         continue;
837 
838                 memcpy(fw_buffer, &fw->code[addr], FW_BUF_SIZE);
839                 if (variant_offset >= addr &&
840                     variant_offset < addr + FW_BUF_SIZE) {
841                         dbg("Patching card_variant byte at 0x%04X",
842                             variant_offset);
843                         fw_buffer[variant_offset - addr] = FW_VAR_VALUE;
844                 }
845                 retval = usb_control_msg(upriv->udev,
846                                          usb_sndctrlpipe(upriv->udev, 0),
847                                          EZUSB_REQUEST_FW_TRANS,
848                                          USB_TYPE_VENDOR | USB_RECIP_DEVICE
849                                          | USB_DIR_OUT,
850                                          addr, 0x0,
851                                          fw_buffer, FW_BUF_SIZE,
852                                          DEF_TIMEOUT);
853 
854                 if (retval < 0)
855                         goto fail;
856         }
857         retval = ezusb_8051_cpucs(upriv, 0);
858         if (retval < 0)
859                 goto fail;
860 
861         goto exit;
862  fail:
863         printk(KERN_ERR PFX "Firmware download failed, error %d\n",
864                retval);
865  exit:
866         kfree(fw_buffer);
867         return retval;
868 }
869 
870 static int ezusb_access_ltv(struct ezusb_priv *upriv,
871                             struct request_context *ctx,
872                             u16 length, const void *data, u16 frame_type,
873                             void *ans_buff, unsigned ans_size, u16 *ans_length)
874 {
875         int req_size;
876         int retval = 0;
877         enum ezusb_state state;
878 
879         BUG_ON(in_irq());
880 
881         if (!upriv->udev) {
882                 dbg("Device disconnected");
883                 retval = -ENODEV;
884                 goto exit;
885         }
886 
887         if (upriv->read_urb->status != -EINPROGRESS)
888                 err("%s: in urb not pending", __func__);
889 
890         /* protect upriv->reply_count, guarantee sequential numbers */
891         spin_lock_bh(&upriv->reply_count_lock);
892         req_size = ezusb_fill_req(ctx->buf, length, ctx->out_rid, data,
893                                   frame_type, upriv->reply_count);
894         usb_fill_bulk_urb(ctx->outurb, upriv->udev, upriv->write_pipe,
895                           ctx->buf, req_size,
896                           ezusb_request_out_callback, ctx);
897 
898         if (ctx->in_rid)
899                 upriv->reply_count = ezusb_reply_inc(upriv->reply_count);
900 
901         ezusb_req_enqueue_run(upriv, ctx);
902 
903         spin_unlock_bh(&upriv->reply_count_lock);
904 
905         if (ctx->in_rid)
906                 ezusb_req_ctx_wait(upriv, ctx);
907 
908         state = ctx->state;
909         switch (state) {
910         case EZUSB_CTX_COMPLETE:
911                 retval = ctx->outurb->status;
912                 break;
913 
914         case EZUSB_CTX_QUEUED:
915         case EZUSB_CTX_REQ_SUBMITTED:
916                 if (!ctx->in_rid)
917                         break;
918         default:
919                 err("%s: Unexpected context state %d", __func__,
920                     state);
921                 /* fall though */
922         case EZUSB_CTX_REQ_TIMEOUT:
923         case EZUSB_CTX_REQ_FAILED:
924         case EZUSB_CTX_RESP_TIMEOUT:
925         case EZUSB_CTX_REQSUBMIT_FAIL:
926                 printk(KERN_ERR PFX "Access failed, resetting (state %d,"
927                        " reply_count %d)\n", state, upriv->reply_count);
928                 upriv->reply_count = 0;
929                 if (state == EZUSB_CTX_REQ_TIMEOUT
930                     || state == EZUSB_CTX_RESP_TIMEOUT) {
931                         printk(KERN_ERR PFX "ctx timed out\n");
932                         retval = -ETIMEDOUT;
933                 } else {
934                         printk(KERN_ERR PFX "ctx failed\n");
935                         retval = -EFAULT;
936                 }
937                 goto exit;
938                 break;
939         }
940         if (ctx->in_rid) {
941                 struct ezusb_packet *ans = ctx->buf;
942                 unsigned exp_len;
943 
944                 if (ans->hermes_len != 0)
945                         exp_len = le16_to_cpu(ans->hermes_len) * 2 + 12;
946                 else
947                         exp_len = 14;
948 
949                 if (exp_len != ctx->buf_length) {
950                         err("%s: length mismatch for RID 0x%04x: "
951                             "expected %d, got %d", __func__,
952                             ctx->in_rid, exp_len, ctx->buf_length);
953                         retval = -EIO;
954                         goto exit;
955                 }
956 
957                 if (ans_buff)
958                         memcpy(ans_buff, ans->data, min(exp_len, ans_size));
959                 if (ans_length)
960                         *ans_length = le16_to_cpu(ans->hermes_len);
961         }
962  exit:
963         ezusb_request_context_put(ctx);
964         return retval;
965 }
966 
967 static int ezusb_write_ltv(struct hermes *hw, int bap, u16 rid,
968                            u16 length, const void *data)
969 {
970         struct ezusb_priv *upriv = hw->priv;
971         u16 frame_type;
972         struct request_context *ctx;
973 
974         if (length == 0)
975                 return -EINVAL;
976 
977         length = HERMES_RECLEN_TO_BYTES(length);
978 
979         /* On memory mapped devices HERMES_RID_CNFGROUPADDRESSES can be
980          * set to be empty, but the USB bridge doesn't like it */
981         if (length == 0)
982                 return 0;
983 
984         ctx = ezusb_alloc_ctx(upriv, rid, EZUSB_RID_ACK);
985         if (!ctx)
986                 return -ENOMEM;
987 
988         if (rid == EZUSB_RID_TX)
989                 frame_type = EZUSB_FRAME_DATA;
990         else
991                 frame_type = EZUSB_FRAME_CONTROL;
992 
993         return ezusb_access_ltv(upriv, ctx, length, data, frame_type,
994                                 NULL, 0, NULL);
995 }
996 
997 static int ezusb_read_ltv(struct hermes *hw, int bap, u16 rid,
998                           unsigned bufsize, u16 *length, void *buf)
999 {
1000         struct ezusb_priv *upriv = hw->priv;
1001         struct request_context *ctx;
1002 
1003         if (bufsize % 2)
1004                 return -EINVAL;
1005 
1006         ctx = ezusb_alloc_ctx(upriv, rid, rid);
1007         if (!ctx)
1008                 return -ENOMEM;
1009 
1010         return ezusb_access_ltv(upriv, ctx, 0, NULL, EZUSB_FRAME_CONTROL,
1011                                 buf, bufsize, length);
1012 }
1013 
1014 static int ezusb_doicmd_wait(struct hermes *hw, u16 cmd, u16 parm0, u16 parm1,
1015                              u16 parm2, struct hermes_response *resp)
1016 {
1017         struct ezusb_priv *upriv = hw->priv;
1018         struct request_context *ctx;
1019 
1020         __le16 data[4] = {
1021                 cpu_to_le16(cmd),
1022                 cpu_to_le16(parm0),
1023                 cpu_to_le16(parm1),
1024                 cpu_to_le16(parm2),
1025         };
1026         dbg("0x%04X, parm0 0x%04X, parm1 0x%04X, parm2 0x%04X",
1027             cmd, parm0, parm1, parm2);
1028         ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_DOCMD, EZUSB_RID_ACK);
1029         if (!ctx)
1030                 return -ENOMEM;
1031 
1032         return ezusb_access_ltv(upriv, ctx, sizeof(data), &data,
1033                                 EZUSB_FRAME_CONTROL, NULL, 0, NULL);
1034 }
1035 
1036 static int ezusb_docmd_wait(struct hermes *hw, u16 cmd, u16 parm0,
1037                             struct hermes_response *resp)
1038 {
1039         struct ezusb_priv *upriv = hw->priv;
1040         struct request_context *ctx;
1041 
1042         __le16 data[4] = {
1043                 cpu_to_le16(cmd),
1044                 cpu_to_le16(parm0),
1045                 0,
1046                 0,
1047         };
1048         dbg("0x%04X, parm0 0x%04X", cmd, parm0);
1049         ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_DOCMD, EZUSB_RID_ACK);
1050         if (!ctx)
1051                 return -ENOMEM;
1052 
1053         return ezusb_access_ltv(upriv, ctx, sizeof(data), &data,
1054                                 EZUSB_FRAME_CONTROL, NULL, 0, NULL);
1055 }
1056 
1057 static int ezusb_bap_pread(struct hermes *hw, int bap,
1058                            void *buf, int len, u16 id, u16 offset)
1059 {
1060         struct ezusb_priv *upriv = hw->priv;
1061         struct ezusb_packet *ans = (void *) upriv->read_urb->transfer_buffer;
1062         int actual_length = upriv->read_urb->actual_length;
1063 
1064         if (id == EZUSB_RID_RX) {
1065                 if ((sizeof(*ans) + offset + len) > actual_length) {
1066                         printk(KERN_ERR PFX "BAP read beyond buffer end "
1067                                "in rx frame\n");
1068                         return -EINVAL;
1069                 }
1070                 memcpy(buf, ans->data + offset, len);
1071                 return 0;
1072         }
1073 
1074         if (EZUSB_IS_INFO(id)) {
1075                 /* Include 4 bytes for length/type */
1076                 if ((sizeof(*ans) + offset + len - 4) > actual_length) {
1077                         printk(KERN_ERR PFX "BAP read beyond buffer end "
1078                                "in info frame\n");
1079                         return -EFAULT;
1080                 }
1081                 memcpy(buf, ans->data + offset - 4, len);
1082         } else {
1083                 printk(KERN_ERR PFX "Unexpected fid 0x%04x\n", id);
1084                 return -EINVAL;
1085         }
1086 
1087         return 0;
1088 }
1089 
1090 static int ezusb_read_pda(struct hermes *hw, __le16 *pda,
1091                           u32 pda_addr, u16 pda_len)
1092 {
1093         struct ezusb_priv *upriv = hw->priv;
1094         struct request_context *ctx;
1095         __le16 data[] = {
1096                 cpu_to_le16(pda_addr & 0xffff),
1097                 cpu_to_le16(pda_len - 4)
1098         };
1099         ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_READ_PDA, EZUSB_RID_READ_PDA);
1100         if (!ctx)
1101                 return -ENOMEM;
1102 
1103         /* wl_lkm does not include PDA size in the PDA area.
1104          * We will pad the information into pda, so other routines
1105          * don't have to be modified */
1106         pda[0] = cpu_to_le16(pda_len - 2);
1107         /* Includes CFG_PROD_DATA but not itself */
1108         pda[1] = cpu_to_le16(0x0800); /* CFG_PROD_DATA */
1109 
1110         return ezusb_access_ltv(upriv, ctx, sizeof(data), &data,
1111                                 EZUSB_FRAME_CONTROL, &pda[2], pda_len - 4,
1112                                 NULL);
1113 }
1114 
1115 static int ezusb_program_init(struct hermes *hw, u32 entry_point)
1116 {
1117         struct ezusb_priv *upriv = hw->priv;
1118         struct request_context *ctx;
1119         __le32 data = cpu_to_le32(entry_point);
1120 
1121         ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_PROG_INIT, EZUSB_RID_ACK);
1122         if (!ctx)
1123                 return -ENOMEM;
1124 
1125         return ezusb_access_ltv(upriv, ctx, sizeof(data), &data,
1126                                 EZUSB_FRAME_CONTROL, NULL, 0, NULL);
1127 }
1128 
1129 static int ezusb_program_end(struct hermes *hw)
1130 {
1131         struct ezusb_priv *upriv = hw->priv;
1132         struct request_context *ctx;
1133 
1134         ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_PROG_END, EZUSB_RID_ACK);
1135         if (!ctx)
1136                 return -ENOMEM;
1137 
1138         return ezusb_access_ltv(upriv, ctx, 0, NULL,
1139                                 EZUSB_FRAME_CONTROL, NULL, 0, NULL);
1140 }
1141 
1142 static int ezusb_program_bytes(struct hermes *hw, const char *buf,
1143                                u32 addr, u32 len)
1144 {
1145         struct ezusb_priv *upriv = hw->priv;
1146         struct request_context *ctx;
1147         __le32 data = cpu_to_le32(addr);
1148         int err;
1149 
1150         ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_PROG_SET_ADDR, EZUSB_RID_ACK);
1151         if (!ctx)
1152                 return -ENOMEM;
1153 
1154         err = ezusb_access_ltv(upriv, ctx, sizeof(data), &data,
1155                                EZUSB_FRAME_CONTROL, NULL, 0, NULL);
1156         if (err)
1157                 return err;
1158 
1159         ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_PROG_BYTES, EZUSB_RID_ACK);
1160         if (!ctx)
1161                 return -ENOMEM;
1162 
1163         return ezusb_access_ltv(upriv, ctx, len, buf,
1164                                 EZUSB_FRAME_CONTROL, NULL, 0, NULL);
1165 }
1166 
1167 static int ezusb_program(struct hermes *hw, const char *buf,
1168                          u32 addr, u32 len)
1169 {
1170         u32 ch_addr;
1171         u32 ch_len;
1172         int err = 0;
1173 
1174         /* We can only send 2048 bytes out of the bulk xmit at a time,
1175          * so we have to split any programming into chunks of <2048
1176          * bytes. */
1177 
1178         ch_len = (len < MAX_DL_SIZE) ? len : MAX_DL_SIZE;
1179         ch_addr = addr;
1180 
1181         while (ch_addr < (addr + len)) {
1182                 pr_debug("Programming subblock of length %d "
1183                          "to address 0x%08x. Data @ %p\n",
1184                          ch_len, ch_addr, &buf[ch_addr - addr]);
1185 
1186                 err = ezusb_program_bytes(hw, &buf[ch_addr - addr],
1187                                           ch_addr, ch_len);
1188                 if (err)
1189                         break;
1190 
1191                 ch_addr += ch_len;
1192                 ch_len = ((addr + len - ch_addr) < MAX_DL_SIZE) ?
1193                         (addr + len - ch_addr) : MAX_DL_SIZE;
1194         }
1195 
1196         return err;
1197 }
1198 
1199 static netdev_tx_t ezusb_xmit(struct sk_buff *skb, struct net_device *dev)
1200 {
1201         struct orinoco_private *priv = ndev_priv(dev);
1202         struct net_device_stats *stats = &priv->stats;
1203         struct ezusb_priv *upriv = priv->card;
1204         u8 mic[MICHAEL_MIC_LEN + 1];
1205         int err = 0;
1206         int tx_control;
1207         unsigned long flags;
1208         struct request_context *ctx;
1209         u8 *buf;
1210         int tx_size;
1211 
1212         if (!netif_running(dev)) {
1213                 printk(KERN_ERR "%s: Tx on stopped device!\n",
1214                        dev->name);
1215                 return NETDEV_TX_BUSY;
1216         }
1217 
1218         if (netif_queue_stopped(dev)) {
1219                 printk(KERN_DEBUG "%s: Tx while transmitter busy!\n",
1220                        dev->name);
1221                 return NETDEV_TX_BUSY;
1222         }
1223 
1224         if (orinoco_lock(priv, &flags) != 0) {
1225                 printk(KERN_ERR
1226                        "%s: ezusb_xmit() called while hw_unavailable\n",
1227                        dev->name);
1228                 return NETDEV_TX_BUSY;
1229         }
1230 
1231         if (!netif_carrier_ok(dev) ||
1232             (priv->iw_mode == NL80211_IFTYPE_MONITOR)) {
1233                 /* Oops, the firmware hasn't established a connection,
1234                    silently drop the packet (this seems to be the
1235                    safest approach). */
1236                 goto drop;
1237         }
1238 
1239         /* Check packet length */
1240         if (skb->len < ETH_HLEN)
1241                 goto drop;
1242 
1243         ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_TX, 0);
1244         if (!ctx)
1245                 goto busy;
1246 
1247         memset(ctx->buf, 0, BULK_BUF_SIZE);
1248         buf = ctx->buf->data;
1249 
1250         tx_control = 0;
1251 
1252         err = orinoco_process_xmit_skb(skb, dev, priv, &tx_control,
1253                                        &mic[0]);
1254         if (err)
1255                 goto drop;
1256 
1257         {
1258                 __le16 *tx_cntl = (__le16 *)buf;
1259                 *tx_cntl = cpu_to_le16(tx_control);
1260                 buf += sizeof(*tx_cntl);
1261         }
1262 
1263         memcpy(buf, skb->data, skb->len);
1264         buf += skb->len;
1265 
1266         if (tx_control & HERMES_TXCTRL_MIC) {
1267                 u8 *m = mic;
1268                 /* Mic has been offset so it can be copied to an even
1269                  * address. We're copying eveything anyway, so we
1270                  * don't need to copy that first byte. */
1271                 if (skb->len % 2)
1272                         m++;
1273                 memcpy(buf, m, MICHAEL_MIC_LEN);
1274                 buf += MICHAEL_MIC_LEN;
1275         }
1276 
1277         /* Finally, we actually initiate the send */
1278         netif_stop_queue(dev);
1279 
1280         /* The card may behave better if we send evenly sized usb transfers */
1281         tx_size = ALIGN(buf - ctx->buf->data, 2);
1282 
1283         err = ezusb_access_ltv(upriv, ctx, tx_size, NULL,
1284                                EZUSB_FRAME_DATA, NULL, 0, NULL);
1285 
1286         if (err) {
1287                 netif_start_queue(dev);
1288                 if (net_ratelimit())
1289                         printk(KERN_ERR "%s: Error %d transmitting packet\n",
1290                                 dev->name, err);
1291                 goto busy;
1292         }
1293 
1294         dev->trans_start = jiffies;
1295         stats->tx_bytes += skb->len;
1296         goto ok;
1297 
1298  drop:
1299         stats->tx_errors++;
1300         stats->tx_dropped++;
1301 
1302  ok:
1303         orinoco_unlock(priv, &flags);
1304         dev_kfree_skb(skb);
1305         return NETDEV_TX_OK;
1306 
1307  busy:
1308         orinoco_unlock(priv, &flags);
1309         return NETDEV_TX_BUSY;
1310 }
1311 
1312 static int ezusb_allocate(struct hermes *hw, u16 size, u16 *fid)
1313 {
1314         *fid = EZUSB_RID_TX;
1315         return 0;
1316 }
1317 
1318 
1319 static int ezusb_hard_reset(struct orinoco_private *priv)
1320 {
1321         struct ezusb_priv *upriv = priv->card;
1322         int retval = ezusb_8051_cpucs(upriv, 1);
1323 
1324         if (retval < 0) {
1325                 err("Failed to reset");
1326                 return retval;
1327         }
1328 
1329         retval = ezusb_8051_cpucs(upriv, 0);
1330         if (retval < 0) {
1331                 err("Failed to unreset");
1332                 return retval;
1333         }
1334 
1335         dbg("sending control message");
1336         retval = usb_control_msg(upriv->udev,
1337                                  usb_sndctrlpipe(upriv->udev, 0),
1338                                  EZUSB_REQUEST_TRIGER,
1339                                  USB_TYPE_VENDOR | USB_RECIP_DEVICE |
1340                                  USB_DIR_OUT, 0x0, 0x0, NULL, 0,
1341                                  DEF_TIMEOUT);
1342         if (retval < 0) {
1343                 err("EZUSB_REQUEST_TRIGER failed retval %d", retval);
1344                 return retval;
1345         }
1346 #if 0
1347         dbg("Sending EZUSB_REQUEST_TRIG_AC");
1348         retval = usb_control_msg(upriv->udev,
1349                                  usb_sndctrlpipe(upriv->udev, 0),
1350                                  EZUSB_REQUEST_TRIG_AC,
1351                                  USB_TYPE_VENDOR | USB_RECIP_DEVICE |
1352                                  USB_DIR_OUT, 0x00FA, 0x0, NULL, 0,
1353                                  DEF_TIMEOUT);
1354         if (retval < 0) {
1355                 err("EZUSB_REQUEST_TRIG_AC failed retval %d", retval);
1356                 return retval;
1357         }
1358 #endif
1359 
1360         return 0;
1361 }
1362 
1363 
1364 static int ezusb_init(struct hermes *hw)
1365 {
1366         struct ezusb_priv *upriv = hw->priv;
1367         int retval;
1368 
1369         BUG_ON(in_interrupt());
1370         BUG_ON(!upriv);
1371 
1372         upriv->reply_count = 0;
1373         /* Write the MAGIC number on the simulated registers to keep
1374          * orinoco.c happy */
1375         hermes_write_regn(hw, SWSUPPORT0, HERMES_MAGIC);
1376         hermes_write_regn(hw, RXFID, EZUSB_RID_RX);
1377 
1378         usb_kill_urb(upriv->read_urb);
1379         ezusb_submit_in_urb(upriv);
1380 
1381         retval = ezusb_write_ltv(hw, 0, EZUSB_RID_INIT1,
1382                                  HERMES_BYTES_TO_RECLEN(2), "\x10\x00");
1383         if (retval < 0) {
1384                 printk(KERN_ERR PFX "EZUSB_RID_INIT1 error %d\n", retval);
1385                 return retval;
1386         }
1387 
1388         retval = ezusb_docmd_wait(hw, HERMES_CMD_INIT, 0, NULL);
1389         if (retval < 0) {
1390                 printk(KERN_ERR PFX "HERMES_CMD_INIT error %d\n", retval);
1391                 return retval;
1392         }
1393 
1394         return 0;
1395 }
1396 
1397 static void ezusb_bulk_in_callback(struct urb *urb)
1398 {
1399         struct ezusb_priv *upriv = (struct ezusb_priv *) urb->context;
1400         struct ezusb_packet *ans = urb->transfer_buffer;
1401         u16 crc;
1402         u16 hermes_rid;
1403 
1404         if (upriv->udev == NULL) {
1405                 dbg("disconnected");
1406                 return;
1407         }
1408 
1409         if (urb->status == -ETIMEDOUT) {
1410                 /* When a device gets unplugged we get this every time
1411                  * we resubmit, flooding the logs.  Since we don't use
1412                  * USB timeouts, it shouldn't happen any other time*/
1413                 pr_warning("%s: urb timed out, not resubmiting", __func__);
1414                 return;
1415         }
1416         if (urb->status == -ECONNABORTED) {
1417                 pr_warning("%s: connection abort, resubmiting urb",
1418                      __func__);
1419                 goto resubmit;
1420         }
1421         if ((urb->status == -EILSEQ)
1422             || (urb->status == -ENOENT)
1423             || (urb->status == -ECONNRESET)) {
1424                 dbg("status %d, not resubmiting", urb->status);
1425                 return;
1426         }
1427         if (urb->status)
1428                 dbg("status: %d length: %d",
1429                     urb->status, urb->actual_length);
1430         if (urb->actual_length < sizeof(*ans)) {
1431                 err("%s: short read, ignoring", __func__);
1432                 goto resubmit;
1433         }
1434         crc = build_crc(ans);
1435         if (le16_to_cpu(ans->crc) != crc) {
1436                 err("CRC error, ignoring packet");
1437                 goto resubmit;
1438         }
1439 
1440         hermes_rid = le16_to_cpu(ans->hermes_rid);
1441         if ((hermes_rid != EZUSB_RID_RX) && !EZUSB_IS_INFO(hermes_rid)) {
1442                 ezusb_request_in_callback(upriv, urb);
1443         } else if (upriv->dev) {
1444                 struct net_device *dev = upriv->dev;
1445                 struct orinoco_private *priv = ndev_priv(dev);
1446                 struct hermes *hw = &priv->hw;
1447 
1448                 if (hermes_rid == EZUSB_RID_RX) {
1449                         __orinoco_ev_rx(dev, hw);
1450                 } else {
1451                         hermes_write_regn(hw, INFOFID,
1452                                           le16_to_cpu(ans->hermes_rid));
1453                         __orinoco_ev_info(dev, hw);
1454                 }
1455         }
1456 
1457  resubmit:
1458         if (upriv->udev)
1459                 ezusb_submit_in_urb(upriv);
1460 }
1461 
1462 static inline void ezusb_delete(struct ezusb_priv *upriv)
1463 {
1464         struct net_device *dev;
1465         struct list_head *item;
1466         struct list_head *tmp_item;
1467         unsigned long flags;
1468 
1469         BUG_ON(in_interrupt());
1470         BUG_ON(!upriv);
1471 
1472         dev = upriv->dev;
1473         mutex_lock(&upriv->mtx);
1474 
1475         upriv->udev = NULL;     /* No timer will be rearmed from here */
1476 
1477         usb_kill_urb(upriv->read_urb);
1478 
1479         spin_lock_irqsave(&upriv->req_lock, flags);
1480         list_for_each_safe(item, tmp_item, &upriv->req_active) {
1481                 struct request_context *ctx;
1482                 int err;
1483 
1484                 ctx = list_entry(item, struct request_context, list);
1485                 atomic_inc(&ctx->refcount);
1486 
1487                 ctx->outurb->transfer_flags |= URB_ASYNC_UNLINK;
1488                 err = usb_unlink_urb(ctx->outurb);
1489 
1490                 spin_unlock_irqrestore(&upriv->req_lock, flags);
1491                 if (err == -EINPROGRESS)
1492                         wait_for_completion(&ctx->done);
1493 
1494                 del_timer_sync(&ctx->timer);
1495                 /* FIXME: there is an slight chance for the irq handler to
1496                  * be running */
1497                 if (!list_empty(&ctx->list))
1498                         ezusb_ctx_complete(ctx);
1499 
1500                 ezusb_request_context_put(ctx);
1501                 spin_lock_irqsave(&upriv->req_lock, flags);
1502         }
1503         spin_unlock_irqrestore(&upriv->req_lock, flags);
1504 
1505         list_for_each_safe(item, tmp_item, &upriv->req_pending)
1506             ezusb_ctx_complete(list_entry(item,
1507                                           struct request_context, list));
1508 
1509         if (upriv->read_urb && upriv->read_urb->status == -EINPROGRESS)
1510                 printk(KERN_ERR PFX "Some URB in progress\n");
1511 
1512         mutex_unlock(&upriv->mtx);
1513 
1514         if (upriv->read_urb) {
1515                 kfree(upriv->read_urb->transfer_buffer);
1516                 usb_free_urb(upriv->read_urb);
1517         }
1518         kfree(upriv->bap_buf);
1519         if (upriv->dev) {
1520                 struct orinoco_private *priv = ndev_priv(upriv->dev);
1521                 orinoco_if_del(priv);
1522                 free_orinocodev(priv);
1523         }
1524 }
1525 
1526 static void ezusb_lock_irqsave(spinlock_t *lock,
1527                                unsigned long *flags) __acquires(lock)
1528 {
1529         spin_lock_bh(lock);
1530 }
1531 
1532 static void ezusb_unlock_irqrestore(spinlock_t *lock,
1533                                     unsigned long *flags) __releases(lock)
1534 {
1535         spin_unlock_bh(lock);
1536 }
1537 
1538 static void ezusb_lock_irq(spinlock_t *lock) __acquires(lock)
1539 {
1540         spin_lock_bh(lock);
1541 }
1542 
1543 static void ezusb_unlock_irq(spinlock_t *lock) __releases(lock)
1544 {
1545         spin_unlock_bh(lock);
1546 }
1547 
1548 static const struct hermes_ops ezusb_ops = {
1549         .init = ezusb_init,
1550         .cmd_wait = ezusb_docmd_wait,
1551         .init_cmd_wait = ezusb_doicmd_wait,
1552         .allocate = ezusb_allocate,
1553         .read_ltv = ezusb_read_ltv,
1554         .write_ltv = ezusb_write_ltv,
1555         .bap_pread = ezusb_bap_pread,
1556         .read_pda = ezusb_read_pda,
1557         .program_init = ezusb_program_init,
1558         .program_end = ezusb_program_end,
1559         .program = ezusb_program,
1560         .lock_irqsave = ezusb_lock_irqsave,
1561         .unlock_irqrestore = ezusb_unlock_irqrestore,
1562         .lock_irq = ezusb_lock_irq,
1563         .unlock_irq = ezusb_unlock_irq,
1564 };
1565 
1566 static const struct net_device_ops ezusb_netdev_ops = {
1567         .ndo_open               = orinoco_open,
1568         .ndo_stop               = orinoco_stop,
1569         .ndo_start_xmit         = ezusb_xmit,
1570         .ndo_set_rx_mode        = orinoco_set_multicast_list,
1571         .ndo_change_mtu         = orinoco_change_mtu,
1572         .ndo_set_mac_address    = eth_mac_addr,
1573         .ndo_validate_addr      = eth_validate_addr,
1574         .ndo_tx_timeout         = orinoco_tx_timeout,
1575         .ndo_get_stats          = orinoco_get_stats,
1576 };
1577 
1578 static int ezusb_probe(struct usb_interface *interface,
1579                        const struct usb_device_id *id)
1580 {
1581         struct usb_device *udev = interface_to_usbdev(interface);
1582         struct orinoco_private *priv;
1583         struct hermes *hw;
1584         struct ezusb_priv *upriv = NULL;
1585         struct usb_interface_descriptor *iface_desc;
1586         struct usb_endpoint_descriptor *ep;
1587         const struct firmware *fw_entry = NULL;
1588         int retval = 0;
1589         int i;
1590 
1591         priv = alloc_orinocodev(sizeof(*upriv), &udev->dev,
1592                                 ezusb_hard_reset, NULL);
1593         if (!priv) {
1594                 err("Couldn't allocate orinocodev");
1595                 goto exit;
1596         }
1597 
1598         hw = &priv->hw;
1599 
1600         upriv = priv->card;
1601 
1602         mutex_init(&upriv->mtx);
1603         spin_lock_init(&upriv->reply_count_lock);
1604 
1605         spin_lock_init(&upriv->req_lock);
1606         INIT_LIST_HEAD(&upriv->req_pending);
1607         INIT_LIST_HEAD(&upriv->req_active);
1608 
1609         upriv->udev = udev;
1610 
1611         hw->iobase = (void __force __iomem *) &upriv->hermes_reg_fake;
1612         hw->reg_spacing = HERMES_16BIT_REGSPACING;
1613         hw->priv = upriv;
1614         hw->ops = &ezusb_ops;
1615 
1616         /* set up the endpoint information */
1617         /* check out the endpoints */
1618 
1619         iface_desc = &interface->altsetting[0].desc;
1620         for (i = 0; i < iface_desc->bNumEndpoints; ++i) {
1621                 ep = &interface->altsetting[0].endpoint[i].desc;
1622 
1623                 if (((ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
1624                      == USB_DIR_IN) &&
1625                     ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
1626                      == USB_ENDPOINT_XFER_BULK)) {
1627                         /* we found a bulk in endpoint */
1628                         if (upriv->read_urb != NULL) {
1629                                 pr_warning("Found a second bulk in ep, ignored");
1630                                 continue;
1631                         }
1632 
1633                         upriv->read_urb = usb_alloc_urb(0, GFP_KERNEL);
1634                         if (!upriv->read_urb) {
1635                                 err("No free urbs available");
1636                                 goto error;
1637                         }
1638                         if (le16_to_cpu(ep->wMaxPacketSize) != 64)
1639                                 pr_warning("bulk in: wMaxPacketSize!= 64");
1640                         if (ep->bEndpointAddress != (2 | USB_DIR_IN))
1641                                 pr_warning("bulk in: bEndpointAddress: %d",
1642                                      ep->bEndpointAddress);
1643                         upriv->read_pipe = usb_rcvbulkpipe(udev,
1644                                                          ep->
1645                                                          bEndpointAddress);
1646                         upriv->read_urb->transfer_buffer =
1647                             kmalloc(BULK_BUF_SIZE, GFP_KERNEL);
1648                         if (!upriv->read_urb->transfer_buffer) {
1649                                 err("Couldn't allocate IN buffer");
1650                                 goto error;
1651                         }
1652                 }
1653 
1654                 if (((ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
1655                      == USB_DIR_OUT) &&
1656                     ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
1657                      == USB_ENDPOINT_XFER_BULK)) {
1658                         /* we found a bulk out endpoint */
1659                         if (upriv->bap_buf != NULL) {
1660                                 pr_warning("Found a second bulk out ep, ignored");
1661                                 continue;
1662                         }
1663 
1664                         if (le16_to_cpu(ep->wMaxPacketSize) != 64)
1665                                 pr_warning("bulk out: wMaxPacketSize != 64");
1666                         if (ep->bEndpointAddress != 2)
1667                                 pr_warning("bulk out: bEndpointAddress: %d",
1668                                      ep->bEndpointAddress);
1669                         upriv->write_pipe = usb_sndbulkpipe(udev,
1670                                                           ep->
1671                                                           bEndpointAddress);
1672                         upriv->bap_buf = kmalloc(BULK_BUF_SIZE, GFP_KERNEL);
1673                         if (!upriv->bap_buf) {
1674                                 err("Couldn't allocate bulk_out_buffer");
1675                                 goto error;
1676                         }
1677                 }
1678         }
1679         if (!upriv->bap_buf || !upriv->read_urb) {
1680                 err("Didn't find the required bulk endpoints");
1681                 goto error;
1682         }
1683 
1684         if (request_firmware(&fw_entry, "orinoco_ezusb_fw",
1685                              &interface->dev) == 0) {
1686                 firmware.size = fw_entry->size;
1687                 firmware.code = fw_entry->data;
1688         }
1689         if (firmware.size && firmware.code) {
1690                 if (ezusb_firmware_download(upriv, &firmware))
1691                         goto error;
1692         } else {
1693                 err("No firmware to download");
1694                 goto error;
1695         }
1696 
1697         if (ezusb_hard_reset(priv) < 0) {
1698                 err("Cannot reset the device");
1699                 goto error;
1700         }
1701 
1702         /* If the firmware is already downloaded orinoco.c will call
1703          * ezusb_init but if the firmware is not already there, that will make
1704          * the kernel very unstable, so we try initializing here and quit in
1705          * case of error */
1706         if (ezusb_init(hw) < 0) {
1707                 err("Couldn't initialize the device");
1708                 err("Firmware may not be downloaded or may be wrong.");
1709                 goto error;
1710         }
1711 
1712         /* Initialise the main driver */
1713         if (orinoco_init(priv) != 0) {
1714                 err("orinoco_init() failed\n");
1715                 goto error;
1716         }
1717 
1718         if (orinoco_if_add(priv, 0, 0, &ezusb_netdev_ops) != 0) {
1719                 upriv->dev = NULL;
1720                 err("%s: orinoco_if_add() failed", __func__);
1721                 goto error;
1722         }
1723         upriv->dev = priv->ndev;
1724 
1725         goto exit;
1726 
1727  error:
1728         ezusb_delete(upriv);
1729         if (upriv->dev) {
1730                 /* upriv->dev was 0, so ezusb_delete() didn't free it */
1731                 free_orinocodev(priv);
1732         }
1733         upriv = NULL;
1734         retval = -EFAULT;
1735  exit:
1736         if (fw_entry) {
1737                 firmware.code = NULL;
1738                 firmware.size = 0;
1739                 release_firmware(fw_entry);
1740         }
1741         usb_set_intfdata(interface, upriv);
1742         return retval;
1743 }
1744 
1745 
1746 static void ezusb_disconnect(struct usb_interface *intf)
1747 {
1748         struct ezusb_priv *upriv = usb_get_intfdata(intf);
1749         usb_set_intfdata(intf, NULL);
1750         ezusb_delete(upriv);
1751         printk(KERN_INFO PFX "Disconnected\n");
1752 }
1753 
1754 
1755 /* usb specific object needed to register this driver with the usb subsystem */
1756 static struct usb_driver orinoco_driver = {
1757         .name = DRIVER_NAME,
1758         .probe = ezusb_probe,
1759         .disconnect = ezusb_disconnect,
1760         .id_table = ezusb_table,
1761         .disable_hub_initiated_lpm = 1,
1762 };
1763 
1764 module_usb_driver(orinoco_driver);
1765 
1766 MODULE_AUTHOR("Manuel Estrada Sainz");
1767 MODULE_DESCRIPTION("Driver for Orinoco wireless LAN cards using EZUSB bridge");
1768 MODULE_LICENSE("Dual MPL/GPL");
1769 

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