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orinoco: clear countermeasure setting on commit
[orinoco_usb.git] / drivers / net / wireless / orinoco / orinoco_usb.c
blob78f089baa8c989933c6b2dc290a6f4e5507f1256
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/init.h>
56 #include <linux/slab.h>
57 #include <linux/fcntl.h>
58 #include <linux/spinlock.h>
59 #include <linux/list.h>
60 #include <linux/smp_lock.h>
61 #include <linux/usb.h>
62 #include <linux/timer.h>
63
64 #include <linux/netdevice.h>
65 #include <linux/if_arp.h>
66 #include <linux/etherdevice.h>
67 #include <linux/wireless.h>
68 #include <linux/firmware.h>
69
70 #include "mic.h"
71 #include "orinoco.h"
72
73 #ifndef URB_ASYNC_UNLINK
74 #define URB_ASYNC_UNLINK 0
75 #endif
76
77 /* 802.2 LLC/SNAP header used for Ethernet encapsulation over 802.11 */
78 static const u8 encaps_hdr[] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00};
79 #define ENCAPS_OVERHEAD (sizeof(encaps_hdr) + 2)
80
81 struct header_struct {
82 /* 802.3 */
83 u8 dest[ETH_ALEN];
84 u8 src[ETH_ALEN];
85 __be16 len;
86 /* 802.2 */
87 u8 dsap;
88 u8 ssap;
89 u8 ctrl;
90 /* SNAP */
91 u8 oui[3];
92 __be16 ethertype;
93 } __attribute__ ((packed));
94
95 struct ez_usb_fw {
96 u16 size;
97 const u8 *code;
98 };
99
100 static struct ez_usb_fw firmware = {
101 .size = 0,
102 .code = NULL,
103 };
104
105 #ifdef CONFIG_USB_DEBUG
106 static int debug = 1;
107 #else
108 static int debug;
109 #endif
110
111 /* Debugging macros */
112 #undef dbg
113 #define dbg(format, arg...) \
114 do { if (debug) printk(KERN_DEBUG PFX "%s: " format "\n", \
115 __func__ , ## arg); } while (0)
116 #undef err
117 #define err(format, arg...) \
118 do { printk(KERN_ERR PFX format "\n", ## arg); } while (0)
119
120 /* Module paramaters */
121 module_param(debug, int, 0644);
122 MODULE_PARM_DESC(debug, "Debug enabled or not");
123
124 MODULE_FIRMWARE("orinoco_ezusb_fw");
125
126 /*
127 * Under some conditions, the card gets stuck and stops paying attention
128 * to the world (i.e. data communication stalls) until we do something to
129 * it. Sending an INQ_TALLIES command seems to be enough and should be
130 * harmless otherwise. This behaviour has been observed when using the
131 * driver on a systemimager client during installation. In the past a
132 * timer was used to send INQ_TALLIES commands when there was no other
133 * activity, but it was troublesome and was removed.
134 */
135
136 #define USB_COMPAQ_VENDOR_ID 0x049f /* Compaq Computer Corp. */
137 #define USB_COMPAQ_WL215_ID 0x001f /* Compaq WL215 USB Adapter */
138 #define USB_COMPAQ_W200_ID 0x0076 /* Compaq W200 USB Adapter */
139 #define USB_HP_WL215_ID 0x0082 /* Compaq WL215 USB Adapter */
140
141 #define USB_MELCO_VENDOR_ID 0x0411
142 #define USB_BUFFALO_L11_ID 0x0006 /* BUFFALO WLI-USB-L11 */
143 #define USB_BUFFALO_L11G_WR_ID 0x000B /* BUFFALO WLI-USB-L11G-WR */
144 #define USB_BUFFALO_L11G_ID 0x000D /* BUFFALO WLI-USB-L11G */
145
146 #define USB_LUCENT_VENDOR_ID 0x047E /* Lucent Technologies */
147 #define USB_LUCENT_ORINOCO_ID 0x0300 /* Lucent/Agere Orinoco USB Client */
148
149 #define USB_AVAYA8_VENDOR_ID 0x0D98
150 #define USB_AVAYAE_VENDOR_ID 0x0D9E
151 #define USB_AVAYA_WIRELESS_ID 0x0300 /* Avaya Wireless USB Card */
152
153 #define USB_AGERE_VENDOR_ID 0x0D4E /* Agere Systems */
154 #define USB_AGERE_MODEL0801_ID 0x1000 /* Wireless USB Card Model 0801 */
155 #define USB_AGERE_MODEL0802_ID 0x1001 /* Wireless USB Card Model 0802 */
156 #define USB_AGERE_REBRANDED_ID 0x047A /* WLAN USB Card */
157
158 #define USB_ELSA_VENDOR_ID 0x05CC
159 #define USB_ELSA_AIRLANCER_ID 0x3100 /* ELSA AirLancer USB-11 */
160
161 #define USB_LEGEND_VENDOR_ID 0x0E7C
162 #define USB_LEGEND_JOYNET_ID 0x0300 /* Joynet WLAN USB Card */
163
164 #define USB_SAMSUNG_VENDOR_ID 0x04E8
165 #define USB_SAMSUNG_SEW2001U1_ID 0x5002 /* Samsung SEW-2001u Card */
166 #define USB_SAMSUNG_SEW2001U2_ID 0x5B11 /* Samsung SEW-2001u Card */
167 #define USB_SAMSUNG_SEW2003U_ID 0x7011 /* Samsung SEW-2003U Card */
168
169 #define USB_IGATE_VENDOR_ID 0x0681
170 #define USB_IGATE_IGATE_11M_ID 0x0012 /* I-GATE 11M USB Card */
171
172 #define USB_FUJITSU_VENDOR_ID 0x0BF8
173 #define USB_FUJITSU_E1100_ID 0x1002 /* connect2AIR WLAN E-1100 USB */
174
175 #define USB_2WIRE_VENDOR_ID 0x1630
176 #define USB_2WIRE_WIRELESS_ID 0xff81 /* 2Wire Wireless USB adapter */
177
178
179 #define EZUSB_REQUEST_FW_TRANS 0xA0
180 #define EZUSB_REQUEST_TRIGER 0xAA
181 #define EZUSB_REQUEST_TRIG_AC 0xAC
182 #define EZUSB_CPUCS_REG 0x7F92
183
184 #define EZUSB_RID_TX 0x0700
185 #define EZUSB_RID_RX 0x0701
186 #define EZUSB_RID_INIT1 0x0702
187 #define EZUSB_RID_ACK 0x0710
188 #define EZUSB_RID_READ_PDA 0x0800
189 #define EZUSB_RID_PROG_INIT 0x0852
190 #define EZUSB_RID_PROG_SET_ADDR 0x0853
191 #define EZUSB_RID_PROG_BYTES 0x0854
192 #define EZUSB_RID_PROG_END 0x0855
193 #define EZUSB_RID_DOCMD 0x0860
194
195 /* Recognize info frames */
196 #define EZUSB_IS_INFO(id) ((id >= 0xF000) && (id <= 0xF2FF))
197
198 #define EZUSB_MAGIC 0x0210
199
200 #define EZUSB_FRAME_DATA 1
201 #define EZUSB_FRAME_CONTROL 2
202
203 #define DEF_TIMEOUT (3*HZ)
204
205 #define BULK_BUF_SIZE 2048
206
207 #define MAX_DL_SIZE (BULK_BUF_SIZE - sizeof(struct ezusb_packet))
208
209 #define FW_BUF_SIZE 64
210 #define FW_VAR_OFFSET_PTR 0x359
211 #define FW_VAR_VALUE 0
212 #define FW_HOLE_START 0x100
213 #define FW_HOLE_END 0x300
214
215 struct ezusb_packet {
216 __le16 magic; /* 0x0210 */
217 u8 req_reply_count;
218 u8 ans_reply_count;
219 __le16 frame_type; /* 0x01 for data frames, 0x02 otherwise */
220 __le16 size; /* transport size */
221 __le16 crc; /* CRC up to here */
222 __le16 hermes_len;
223 __le16 hermes_rid;
224 u8 data[0];
225 } __attribute__ ((packed));
226
227 /* Table of devices that work or may work with this driver */
228 static struct usb_device_id ezusb_table[] = {
229 {USB_DEVICE(USB_COMPAQ_VENDOR_ID, USB_COMPAQ_WL215_ID)},
230 {USB_DEVICE(USB_COMPAQ_VENDOR_ID, USB_HP_WL215_ID)},
231 {USB_DEVICE(USB_COMPAQ_VENDOR_ID, USB_COMPAQ_W200_ID)},
232 {USB_DEVICE(USB_MELCO_VENDOR_ID, USB_BUFFALO_L11_ID)},
233 {USB_DEVICE(USB_MELCO_VENDOR_ID, USB_BUFFALO_L11G_WR_ID)},
234 {USB_DEVICE(USB_MELCO_VENDOR_ID, USB_BUFFALO_L11G_ID)},
235 {USB_DEVICE(USB_LUCENT_VENDOR_ID, USB_LUCENT_ORINOCO_ID)},
236 {USB_DEVICE(USB_AVAYA8_VENDOR_ID, USB_AVAYA_WIRELESS_ID)},
237 {USB_DEVICE(USB_AVAYAE_VENDOR_ID, USB_AVAYA_WIRELESS_ID)},
238 {USB_DEVICE(USB_AGERE_VENDOR_ID, USB_AGERE_MODEL0801_ID)},
239 {USB_DEVICE(USB_AGERE_VENDOR_ID, USB_AGERE_MODEL0802_ID)},
240 {USB_DEVICE(USB_ELSA_VENDOR_ID, USB_ELSA_AIRLANCER_ID)},
241 {USB_DEVICE(USB_LEGEND_VENDOR_ID, USB_LEGEND_JOYNET_ID)},
242 {USB_DEVICE_VER(USB_SAMSUNG_VENDOR_ID, USB_SAMSUNG_SEW2001U1_ID,
243 0, 0)},
244 {USB_DEVICE(USB_SAMSUNG_VENDOR_ID, USB_SAMSUNG_SEW2001U2_ID)},
245 {USB_DEVICE(USB_SAMSUNG_VENDOR_ID, USB_SAMSUNG_SEW2003U_ID)},
246 {USB_DEVICE(USB_IGATE_VENDOR_ID, USB_IGATE_IGATE_11M_ID)},
247 {USB_DEVICE(USB_FUJITSU_VENDOR_ID, USB_FUJITSU_E1100_ID)},
248 {USB_DEVICE(USB_2WIRE_VENDOR_ID, USB_2WIRE_WIRELESS_ID)},
249 {USB_DEVICE(USB_AGERE_VENDOR_ID, USB_AGERE_REBRANDED_ID)},
250 {} /* Terminating entry */
251 };
252
253 MODULE_DEVICE_TABLE(usb, ezusb_table);
254
255 /* Structure to hold all of our device specific stuff */
256 struct ezusb_priv {
257 struct usb_device *udev;
258 struct net_device *dev;
259 struct mutex mtx;
260 spinlock_t req_lock;
261 struct list_head req_pending;
262 struct list_head req_active;
263 spinlock_t reply_count_lock;
264 u16 hermes_reg_fake[0x40];
265 u8 *bap_buf;
266 struct urb *read_urb;
267 int read_pipe;
268 int write_pipe;
269 u8 reply_count;
270 };
271
272 enum ezusb_state {
273 EZUSB_CTX_START,
274 EZUSB_CTX_QUEUED,
275 EZUSB_CTX_REQ_SUBMITTED,
276 EZUSB_CTX_REQ_COMPLETE,
277 EZUSB_CTX_RESP_RECEIVED,
278 EZUSB_CTX_REQ_TIMEOUT,
279 EZUSB_CTX_REQ_FAILED,
280 EZUSB_CTX_RESP_TIMEOUT,
281 EZUSB_CTX_REQSUBMIT_FAIL,
282 EZUSB_CTX_COMPLETE,
283 };
284
285 struct request_context {
286 struct list_head list;
287 atomic_t refcount;
288 struct completion done; /* Signals that CTX is dead */
289 int killed;
290 struct urb *outurb; /* OUT for req pkt */
291 struct ezusb_priv *upriv;
292 struct ezusb_packet *buf;
293 int buf_length;
294 struct timer_list timer; /* Timeout handling */
295 enum ezusb_state state; /* Current state */
296 /* the RID that we will wait for */
297 u16 out_rid;
298 u16 in_rid;
299 };
300
301
302 /* Forward declarations */
303 static void ezusb_ctx_complete(struct request_context *ctx);
304 static void ezusb_req_queue_run(struct ezusb_priv *upriv);
305 static void ezusb_bulk_in_callback(struct urb *urb);
306
307 static inline u8 ezusb_reply_inc(u8 count)
308 {
309 if (count < 0x7F)
310 return count + 1;
311 else
312 return 1;
313 }
314
315 static void ezusb_request_context_put(struct request_context *ctx)
316 {
317 if (!atomic_dec_and_test(&ctx->refcount))
318 return;
319
320 WARN_ON(!ctx->done.done);
321 BUG_ON(ctx->outurb->status == -EINPROGRESS);
322 BUG_ON(timer_pending(&ctx->timer));
323 usb_free_urb(ctx->outurb);
324 kfree(ctx->buf);
325 kfree(ctx);
326 }
327
328 static inline void ezusb_mod_timer(struct ezusb_priv *upriv,
329 struct timer_list *timer,
330 unsigned long expire)
331 {
332 if (!upriv->udev)
333 return;
334 mod_timer(timer, expire);
335 }
336
337 static void ezusb_request_timerfn(u_long _ctx)
338 {
339 struct request_context *ctx = (void *) _ctx;
340
341 ctx->outurb->transfer_flags |= URB_ASYNC_UNLINK;
342 if (usb_unlink_urb(ctx->outurb) == -EINPROGRESS) {
343 ctx->state = EZUSB_CTX_REQ_TIMEOUT;
344 } else {
345 ctx->state = EZUSB_CTX_RESP_TIMEOUT;
346 dbg("couldn't unlink");
347 atomic_inc(&ctx->refcount);
348 ctx->killed = 1;
349 ezusb_ctx_complete(ctx);
350 ezusb_request_context_put(ctx);
351 }
352 };
353
354 static struct request_context *ezusb_alloc_ctx(struct ezusb_priv *upriv,
355 u16 out_rid, u16 in_rid)
356 {
357 struct request_context *ctx;
358
359 ctx = kmalloc(sizeof(*ctx), GFP_ATOMIC);
360 if (!ctx)
361 return NULL;
362
363 memset(ctx, 0, sizeof(*ctx));
364
365 ctx->buf = kmalloc(BULK_BUF_SIZE, GFP_ATOMIC);
366 if (!ctx->buf) {
367 kfree(ctx);
368 return NULL;
369 }
370 ctx->outurb = usb_alloc_urb(0, GFP_ATOMIC);
371 if (!ctx->outurb) {
372 kfree(ctx->buf);
373 kfree(ctx);
374 return NULL;
375 }
376
377 ctx->upriv = upriv;
378 ctx->state = EZUSB_CTX_START;
379 ctx->out_rid = out_rid;
380 ctx->in_rid = in_rid;
381
382 atomic_set(&ctx->refcount, 1);
383 init_completion(&ctx->done);
384
385 init_timer(&ctx->timer);
386 ctx->timer.function = ezusb_request_timerfn;
387 ctx->timer.data = (u_long) ctx;
388 return ctx;
389 }
390
391
392 /* Hopefully the real complete_all will soon be exported, in the mean
393 * while this should work. */
394 static inline void ezusb_complete_all(struct completion *comp)
395 {
396 complete(comp);
397 complete(comp);
398 complete(comp);
399 complete(comp);
400 }
401
402 static void ezusb_ctx_complete(struct request_context *ctx)
403 {
404 struct ezusb_priv *upriv = ctx->upriv;
405 unsigned long flags;
406
407 spin_lock_irqsave(&upriv->req_lock, flags);
408
409 list_del_init(&ctx->list);
410 if (upriv->udev) {
411 spin_unlock_irqrestore(&upriv->req_lock, flags);
412 ezusb_req_queue_run(upriv);
413 spin_lock_irqsave(&upriv->req_lock, flags);
414 }
415
416 switch (ctx->state) {
417 case EZUSB_CTX_COMPLETE:
418 case EZUSB_CTX_REQSUBMIT_FAIL:
419 case EZUSB_CTX_REQ_FAILED:
420 case EZUSB_CTX_REQ_TIMEOUT:
421 case EZUSB_CTX_RESP_TIMEOUT:
422 spin_unlock_irqrestore(&upriv->req_lock, flags);
423
424 if ((ctx->out_rid == EZUSB_RID_TX) && upriv->dev) {
425 struct net_device *dev = upriv->dev;
426 struct orinoco_private *priv = ndev_priv(dev);
427 struct net_device_stats *stats = &priv->stats;
428
429 if (ctx->state != EZUSB_CTX_COMPLETE)
430 stats->tx_errors++;
431 else
432 stats->tx_packets++;
433
434 netif_wake_queue(dev);
435 }
436 ezusb_complete_all(&ctx->done);
437 ezusb_request_context_put(ctx);
438 break;
439
440 default:
441 spin_unlock_irqrestore(&upriv->req_lock, flags);
442 if (!upriv->udev) {
443 /* This is normal, as all request contexts get flushed
444 * when the device is disconnected */
445 err("Called, CTX not terminating, but device gone");
446 ezusb_complete_all(&ctx->done);
447 ezusb_request_context_put(ctx);
448 break;
449 }
450
451 err("Called, CTX not in terminating state.");
452 /* Things are really bad if this happens. Just leak
453 * the CTX because it may still be linked to the
454 * queue or the OUT urb may still be active.
455 * Just leaking at least prevents an Oops or Panic.
456 */
457 break;
458 }
459 }
460
461 /**
462 * ezusb_req_queue_run:
463 * Description:
464 * Note: Only one active CTX at any one time, because there's no
465 * other (reliable) way to match the response URB to the correct
466 * CTX.
467 **/
468 static void ezusb_req_queue_run(struct ezusb_priv *upriv)
469 {
470 unsigned long flags;
471 struct request_context *ctx;
472 int result;
473
474 spin_lock_irqsave(&upriv->req_lock, flags);
475
476 if (!list_empty(&upriv->req_active))
477 goto unlock;
478
479 if (list_empty(&upriv->req_pending))
480 goto unlock;
481
482 ctx =
483 list_entry(upriv->req_pending.next, struct request_context,
484 list);
485
486 if (!ctx->upriv->udev)
487 goto unlock;
488
489 /* We need to split this off to avoid a race condition */
490 list_move_tail(&ctx->list, &upriv->req_active);
491
492 if (ctx->state == EZUSB_CTX_QUEUED) {
493 atomic_inc(&ctx->refcount);
494 result = usb_submit_urb(ctx->outurb, GFP_ATOMIC);
495 if (result) {
496 ctx->state = EZUSB_CTX_REQSUBMIT_FAIL;
497
498 spin_unlock_irqrestore(&upriv->req_lock, flags);
499
500 err("Fatal, failed to submit command urb."
501 " error=%d\n", result);
502
503 ezusb_ctx_complete(ctx);
504 ezusb_request_context_put(ctx);
505 goto done;
506 }
507
508 ctx->state = EZUSB_CTX_REQ_SUBMITTED;
509 ezusb_mod_timer(ctx->upriv, &ctx->timer,
510 jiffies + DEF_TIMEOUT);
511 }
512
513 unlock:
514 spin_unlock_irqrestore(&upriv->req_lock, flags);
515
516 done:
517 return;
518 }
519
520 static void ezusb_req_enqueue_run(struct ezusb_priv *upriv,
521 struct request_context *ctx)
522 {
523 unsigned long flags;
524
525 spin_lock_irqsave(&upriv->req_lock, flags);
526
527 if (!ctx->upriv->udev) {
528 spin_unlock_irqrestore(&upriv->req_lock, flags);
529 goto done;
530 }
531 atomic_inc(&ctx->refcount);
532 list_add_tail(&ctx->list, &upriv->req_pending);
533 spin_unlock_irqrestore(&upriv->req_lock, flags);
534
535 ctx->state = EZUSB_CTX_QUEUED;
536 ezusb_req_queue_run(upriv);
537
538 done:
539 return;
540 }
541
542 static void ezusb_request_out_callback(struct urb *urb)
543 {
544 unsigned long flags;
545 enum ezusb_state state;
546 struct request_context *ctx = urb->context;
547 struct ezusb_priv *upriv = ctx->upriv;
548
549 spin_lock_irqsave(&upriv->req_lock, flags);
550
551 del_timer(&ctx->timer);
552
553 if (ctx->killed) {
554 spin_unlock_irqrestore(&upriv->req_lock, flags);
555 pr_warning("interrupt called with dead ctx");
556 goto out;
557 }
558
559 state = ctx->state;
560
561 if (urb->status == 0) {
562 switch (state) {
563 case EZUSB_CTX_REQ_SUBMITTED:
564 if (ctx->in_rid) {
565 ctx->state = EZUSB_CTX_REQ_COMPLETE;
566 /* reply URB still pending */
567 ezusb_mod_timer(upriv, &ctx->timer,
568 jiffies + DEF_TIMEOUT);
569 spin_unlock_irqrestore(&upriv->req_lock,
570 flags);
571 break;
572 }
573 /* fall through */
574 case EZUSB_CTX_RESP_RECEIVED:
575 /* IN already received before this OUT-ACK */
576 ctx->state = EZUSB_CTX_COMPLETE;
577 spin_unlock_irqrestore(&upriv->req_lock, flags);
578 ezusb_ctx_complete(ctx);
579 break;
580
581 default:
582 spin_unlock_irqrestore(&upriv->req_lock, flags);
583 err("Unexpected state(0x%x, %d) in OUT URB",
584 state, urb->status);
585 break;
586 }
587 } else {
588 /* If someone cancels the OUT URB then its status
589 * should be either -ECONNRESET or -ENOENT.
590 */
591 switch (state) {
592 case EZUSB_CTX_REQ_SUBMITTED:
593 case EZUSB_CTX_RESP_RECEIVED:
594 ctx->state = EZUSB_CTX_REQ_FAILED;
595 /* fall through */
596
597 case EZUSB_CTX_REQ_FAILED:
598 case EZUSB_CTX_REQ_TIMEOUT:
599 spin_unlock_irqrestore(&upriv->req_lock, flags);
600
601 ezusb_ctx_complete(ctx);
602 break;
603
604 default:
605 spin_unlock_irqrestore(&upriv->req_lock, flags);
606
607 err("Unexpected state(0x%x, %d) in OUT URB",
608 state, urb->status);
609 break;
610 }
611 }
612 out:
613 ezusb_request_context_put(ctx);
614 }
615
616 static void ezusb_request_in_callback(struct ezusb_priv *upriv,
617 struct urb *urb)
618 {
619 struct ezusb_packet *ans = urb->transfer_buffer;
620 struct request_context *ctx = NULL;
621 enum ezusb_state state;
622 unsigned long flags;
623
624 /* Find the CTX on the active queue that requested this URB */
625 spin_lock_irqsave(&upriv->req_lock, flags);
626 if (upriv->udev) {
627 struct list_head *item;
628
629 list_for_each(item, &upriv->req_active) {
630 struct request_context *c;
631 int reply_count;
632
633 c = list_entry(item, struct request_context, list);
634 reply_count =
635 ezusb_reply_inc(c->buf->req_reply_count);
636 if ((ans->ans_reply_count == reply_count)
637 && (le16_to_cpu(ans->hermes_rid) == c->in_rid)) {
638 ctx = c;
639 break;
640 }
641 dbg("Skipped (0x%x/0x%x) (%d/%d)",
642 le16_to_cpu(ans->hermes_rid),
643 c->in_rid, ans->ans_reply_count, reply_count);
644 }
645 }
646
647 if (ctx == NULL) {
648 spin_unlock_irqrestore(&upriv->req_lock, flags);
649 err("%s: got unexpected RID: 0x%04X", __func__,
650 le16_to_cpu(ans->hermes_rid));
651 ezusb_req_queue_run(upriv);
652 return;
653 }
654
655 /* The data we want is in the in buffer, exchange */
656 urb->transfer_buffer = ctx->buf;
657 ctx->buf = (void *) ans;
658 ctx->buf_length = urb->actual_length;
659
660 state = ctx->state;
661 switch (state) {
662 case EZUSB_CTX_REQ_SUBMITTED:
663 /* We have received our response URB before
664 * our request has been acknowledged. Do NOT
665 * destroy our CTX yet, because our OUT URB
666 * is still alive ...
667 */
668 ctx->state = EZUSB_CTX_RESP_RECEIVED;
669 spin_unlock_irqrestore(&upriv->req_lock, flags);
670
671 /* Let the machine continue running. */
672 break;
673
674 case EZUSB_CTX_REQ_COMPLETE:
675 /* This is the usual path: our request
676 * has already been acknowledged, and
677 * we have now received the reply.
678 */
679 ctx->state = EZUSB_CTX_COMPLETE;
680
681 /* Stop the intimer */
682 del_timer(&ctx->timer);
683 spin_unlock_irqrestore(&upriv->req_lock, flags);
684
685 /* Call the completion handler */
686 ezusb_ctx_complete(ctx);
687 break;
688
689 default:
690 spin_unlock_irqrestore(&upriv->req_lock, flags);
691
692 pr_warning("Matched IN URB, unexpected context state(0x%x)",
693 state);
694 /* Throw this CTX away and try submitting another */
695 del_timer(&ctx->timer);
696 ctx->outurb->transfer_flags |= URB_ASYNC_UNLINK;
697 usb_unlink_urb(ctx->outurb);
698 ezusb_req_queue_run(upriv);
699 break;
700 } /* switch */
701 }
702
703
704 static void ezusb_req_ctx_wait(struct ezusb_priv *upriv,
705 struct request_context *ctx)
706 {
707 switch (ctx->state) {
708 case EZUSB_CTX_QUEUED:
709 case EZUSB_CTX_REQ_SUBMITTED:
710 case EZUSB_CTX_REQ_COMPLETE:
711 case EZUSB_CTX_RESP_RECEIVED:
712 if (in_softirq()) {
713 /* If we get called from a timer, timeout timers don't
714 * get the chance to run themselves. So we make sure
715 * that we don't sleep for ever */
716 int msecs = DEF_TIMEOUT * (1000 / HZ);
717 while (!ctx->done.done && msecs--)
718 udelay(1000);
719 } else {
720 wait_event_interruptible(ctx->done.wait,
721 ctx->done.done);
722 }
723 break;
724 default:
725 /* Done or failed - nothing to wait for */
726 break;
727 }
728 }
729
730 static inline u16 build_crc(struct ezusb_packet *data)
731 {
732 u16 crc = 0;
733 u8 *bytes = (u8 *)data;
734 int i;
735
736 for (i = 0; i < 8; i++)
737 crc = (crc << 1) + bytes[i];
738
739 return crc;
740 }
741
742 /**
743 * ezusb_fill_req:
744 *
745 * if data == NULL and length > 0 the data is assumed to be already in
746 * the target buffer and only the header is filled.
747 *
748 */
749 static int ezusb_fill_req(struct ezusb_packet *req, u16 length, u16 rid,
750 const void *data, u16 frame_type, u8 reply_count)
751 {
752 int total_size = sizeof(*req) + length;
753
754 BUG_ON(total_size > BULK_BUF_SIZE);
755
756 req->magic = cpu_to_le16(EZUSB_MAGIC);
757 req->req_reply_count = reply_count;
758 req->ans_reply_count = 0;
759 req->frame_type = cpu_to_le16(frame_type);
760 req->size = cpu_to_le16(length + 4);
761 req->crc = cpu_to_le16(build_crc(req));
762 req->hermes_len = cpu_to_le16(HERMES_BYTES_TO_RECLEN(length));
763 req->hermes_rid = cpu_to_le16(rid);
764 if (data)
765 memcpy(req->data, data, length);
766 return total_size;
767 }
768
769 static int ezusb_submit_in_urb(struct ezusb_priv *upriv)
770 {
771 int retval = 0;
772 void *cur_buf = upriv->read_urb->transfer_buffer;
773
774 if (upriv->read_urb->status == -EINPROGRESS) {
775 dbg("urb busy, not resubmiting");
776 retval = -EBUSY;
777 goto exit;
778 }
779 usb_fill_bulk_urb(upriv->read_urb, upriv->udev, upriv->read_pipe,
780 cur_buf, BULK_BUF_SIZE,
781 ezusb_bulk_in_callback, upriv);
782 upriv->read_urb->transfer_flags = 0;
783 retval = usb_submit_urb(upriv->read_urb, GFP_ATOMIC);
784 if (retval)
785 err("%s submit failed %d", __func__, retval);
786
787 exit:
788 return retval;
789 }
790
791 static inline int ezusb_8051_cpucs(struct ezusb_priv *upriv, int reset)
792 {
793 u8 res_val = reset; /* avoid argument promotion */
794
795 if (!upriv->udev) {
796 err("%s: !upriv->udev", __func__);
797 return -EFAULT;
798 }
799 return usb_control_msg(upriv->udev,
800 usb_sndctrlpipe(upriv->udev, 0),
801 EZUSB_REQUEST_FW_TRANS,
802 USB_TYPE_VENDOR | USB_RECIP_DEVICE |
803 USB_DIR_OUT, EZUSB_CPUCS_REG, 0, &res_val,
804 sizeof(res_val), DEF_TIMEOUT);
805 }
806
807 static int ezusb_firmware_download(struct ezusb_priv *upriv,
808 struct ez_usb_fw *fw)
809 {
810 u8 fw_buffer[FW_BUF_SIZE];
811 int retval, addr;
812 int variant_offset;
813
814 /*
815 * This byte is 1 and should be replaced with 0. The offset is
816 * 0x10AD in version 0.0.6. The byte in question should follow
817 * the end of the code pointed to by the jump in the beginning
818 * of the firmware. Also, it is read by code located at 0x358.
819 */
820 variant_offset = be16_to_cpup((__be16 *) &fw->code[FW_VAR_OFFSET_PTR]);
821 if (variant_offset >= fw->size) {
822 printk(KERN_ERR PFX "Invalid firmware variant offset: "
823 "0x%04x\n", variant_offset);
824 retval = -EINVAL;
825 goto fail;
826 }
827
828 retval = ezusb_8051_cpucs(upriv, 1);
829 if (retval < 0)
830 goto fail;
831 for (addr = 0; addr < fw->size; addr += FW_BUF_SIZE) {
832 /* 0x100-0x300 should be left alone, it contains card
833 * specific data, like USB enumeration information */
834 if ((addr >= FW_HOLE_START) && (addr < FW_HOLE_END))
835 continue;
836
837 memcpy(fw_buffer, &fw->code[addr], FW_BUF_SIZE);
838 if (variant_offset >= addr &&
839 variant_offset < addr + FW_BUF_SIZE) {
840 dbg("Patching card_variant byte at 0x%04X",
841 variant_offset);
842 fw_buffer[variant_offset - addr] = FW_VAR_VALUE;
843 }
844 retval = usb_control_msg(upriv->udev,
845 usb_sndctrlpipe(upriv->udev, 0),
846 EZUSB_REQUEST_FW_TRANS,
847 USB_TYPE_VENDOR | USB_RECIP_DEVICE
848 | USB_DIR_OUT,
849 addr, 0x0,
850 fw_buffer, FW_BUF_SIZE,
851 DEF_TIMEOUT);
852
853 if (retval < 0)
854 goto fail;
855 }
856 retval = ezusb_8051_cpucs(upriv, 0);
857 if (retval < 0)
858 goto fail;
859
860 goto exit;
861 fail:
862 printk(KERN_ERR PFX "Firmware download failed, error %d\n",
863 retval);
864 exit:
865 return retval;
866 }
867
868 static int ezusb_access_ltv(struct ezusb_priv *upriv,
869 struct request_context *ctx,
870 u16 length, const void *data, u16 frame_type,
871 void *ans_buff, int ans_size, u16 *ans_length)
872 {
873 int req_size;
874 int retval = 0;
875 enum ezusb_state state;
876
877 BUG_ON(in_irq());
878
879 if (!upriv->udev) {
880 dbg("Device disconnected");
881 return -ENODEV;
882 }
883
884 if (upriv->read_urb->status != -EINPROGRESS)
885 err("%s: in urb not pending", __func__);
886
887 /* protect upriv->reply_count, guarantee sequential numbers */
888 spin_lock_bh(&upriv->reply_count_lock);
889 req_size = ezusb_fill_req(ctx->buf, length, ctx->out_rid, data,
890 frame_type, upriv->reply_count);
891 usb_fill_bulk_urb(ctx->outurb, upriv->udev, upriv->write_pipe,
892 ctx->buf, req_size,
893 ezusb_request_out_callback, ctx);
894
895 if (ctx->in_rid)
896 upriv->reply_count = ezusb_reply_inc(upriv->reply_count);
897
898 ezusb_req_enqueue_run(upriv, ctx);
899
900 spin_unlock_bh(&upriv->reply_count_lock);
901
902 if (ctx->in_rid)
903 ezusb_req_ctx_wait(upriv, ctx);
904
905 state = ctx->state;
906 switch (state) {
907 case EZUSB_CTX_COMPLETE:
908 retval = ctx->outurb->status;
909 break;
910
911 case EZUSB_CTX_QUEUED:
912 case EZUSB_CTX_REQ_SUBMITTED:
913 if (!ctx->in_rid)
914 break;
915 default:
916 err("%s: Unexpected context state %d", __func__,
917 state);
918 /* fall though */
919 case EZUSB_CTX_REQ_TIMEOUT:
920 case EZUSB_CTX_REQ_FAILED:
921 case EZUSB_CTX_RESP_TIMEOUT:
922 case EZUSB_CTX_REQSUBMIT_FAIL:
923 printk(KERN_ERR PFX "Access failed, resetting (state %d,"
924 " reply_count %d)\n", state, upriv->reply_count);
925 upriv->reply_count = 0;
926 if (state == EZUSB_CTX_REQ_TIMEOUT
927 || state == EZUSB_CTX_RESP_TIMEOUT) {
928 printk(KERN_ERR PFX "ctx timed out\n");
929 retval = -ETIMEDOUT;
930 } else {
931 printk(KERN_ERR PFX "ctx failed\n");
932 retval = -EFAULT;
933 }
934 goto exit;
935 break;
936 }
937 if (ctx->in_rid) {
938 struct ezusb_packet *ans = ctx->buf;
939 int exp_len;
940
941 if (ans->hermes_len != 0)
942 exp_len = le16_to_cpu(ans->hermes_len) * 2 + 12;
943 else
944 exp_len = 14;
945
946 if (exp_len != ctx->buf_length) {
947 err("%s: length mismatch for RID 0x%04x: "
948 "expected %d, got %d", __func__,
949 ctx->in_rid, exp_len, ctx->buf_length);
950 retval = -EIO;
951 goto exit;
952 }
953
954 if (ans_buff)
955 memcpy(ans_buff, ans->data,
956 min_t(int, exp_len, ans_size));
957 if (ans_length)
958 *ans_length = le16_to_cpu(ans->hermes_len);
959 }
960 exit:
961 ezusb_request_context_put(ctx);
962 return retval;
963 }
964
965 static int ezusb_write_ltv(hermes_t *hw, int bap, u16 rid,
966 u16 length, const void *data)
967 {
968 struct ezusb_priv *upriv = hw->priv;
969 u16 frame_type;
970 struct request_context *ctx;
971
972 if (length == 0)
973 return -EINVAL;
974
975 length = HERMES_RECLEN_TO_BYTES(length);
976
977 /* On memory mapped devices HERMES_RID_CNFGROUPADDRESSES can be
978 * set to be empty, but the USB bridge doesn't like it */
979 if (length == 0)
980 return 0;
981
982 ctx = ezusb_alloc_ctx(upriv, rid, EZUSB_RID_ACK);
983 if (!ctx)
984 return -ENOMEM;
985
986 if (rid == EZUSB_RID_TX)
987 frame_type = EZUSB_FRAME_DATA;
988 else
989 frame_type = EZUSB_FRAME_CONTROL;
990
991 return ezusb_access_ltv(upriv, ctx, length, data, frame_type,
992 NULL, 0, NULL);
993 }
994
995 static int ezusb_read_ltv(hermes_t *hw, int bap, u16 rid,
996 unsigned bufsize, u16 *length, void *buf)
997 {
998 struct ezusb_priv *upriv = hw->priv;
999 struct request_context *ctx;
1000
1001 if ((bufsize < 0) || (bufsize % 2))
1002 return -EINVAL;
1003
1004 ctx = ezusb_alloc_ctx(upriv, rid, rid);
1005 if (!ctx)
1006 return -ENOMEM;
1007
1008 return ezusb_access_ltv(upriv, ctx, 0, NULL, EZUSB_FRAME_CONTROL,
1009 buf, bufsize, length);
1010 }
1011
1012 static int ezusb_doicmd_wait(hermes_t *hw, u16 cmd, u16 parm0, u16 parm1,
1013 u16 parm2, struct hermes_response *resp)
1014 {
1015 struct ezusb_priv *upriv = hw->priv;
1016 struct request_context *ctx;
1017
1018 __le16 data[4] = {
1019 cpu_to_le16(cmd),
1020 cpu_to_le16(parm0),
1021 cpu_to_le16(parm1),
1022 cpu_to_le16(parm2),
1023 };
1024 dbg("0x%04X, parm0 0x%04X, parm1 0x%04X, parm2 0x%04X",
1025 cmd, parm0, parm1, parm2);
1026 ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_DOCMD, EZUSB_RID_ACK);
1027 if (!ctx)
1028 return -ENOMEM;
1029
1030 return ezusb_access_ltv(upriv, ctx, sizeof(data), &data,
1031 EZUSB_FRAME_CONTROL, NULL, 0, NULL);
1032 }
1033
1034 static int ezusb_docmd_wait(hermes_t *hw, u16 cmd, u16 parm0,
1035 struct hermes_response *resp)
1036 {
1037 struct ezusb_priv *upriv = hw->priv;
1038 struct request_context *ctx;
1039
1040 __le16 data[4] = {
1041 cpu_to_le16(cmd),
1042 cpu_to_le16(parm0),
1043 0,
1044 0,
1045 };
1046 dbg("0x%04X, parm0 0x%04X", cmd, parm0);
1047 ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_DOCMD, EZUSB_RID_ACK);
1048 if (!ctx)
1049 return -ENOMEM;
1050
1051 return ezusb_access_ltv(upriv, ctx, sizeof(data), &data,
1052 EZUSB_FRAME_CONTROL, NULL, 0, NULL);
1053 }
1054
1055 static int ezusb_bap_pread(struct hermes *hw, int bap,
1056 void *buf, int len, u16 id, u16 offset)
1057 {
1058 struct ezusb_priv *upriv = hw->priv;
1059 struct ezusb_packet *ans = (void *) upriv->read_urb->transfer_buffer;
1060 int actual_length = upriv->read_urb->actual_length;
1061
1062 if (id == EZUSB_RID_RX) {
1063 if ((sizeof(*ans) + offset + len) > actual_length) {
1064 printk(KERN_ERR PFX "BAP read beyond buffer end "
1065 "in rx frame\n");
1066 return -EINVAL;
1067 }
1068 memcpy(buf, ans->data + offset, len);
1069 return 0;
1070 }
1071
1072 if (EZUSB_IS_INFO(id)) {
1073 /* Include 4 bytes for length/type */
1074 if ((sizeof(*ans) + offset + len - 4) > actual_length) {
1075 printk(KERN_ERR PFX "BAP read beyond buffer end "
1076 "in info frame\n");
1077 return -EFAULT;
1078 }
1079 memcpy(buf, ans->data + offset - 4, len);
1080 } else {
1081 printk(KERN_ERR PFX "Unexpected fid 0x%04x\n", id);
1082 return -EINVAL;
1083 }
1084
1085 return 0;
1086 }
1087
1088 static int ezusb_read_pda(struct hermes *hw, __le16 *pda,
1089 u32 pda_addr, u16 pda_len)
1090 {
1091 struct ezusb_priv *upriv = hw->priv;
1092 struct request_context *ctx;
1093 __le16 data[] = {
1094 cpu_to_le16(pda_addr & 0xffff),
1095 cpu_to_le16(pda_len - 4)
1096 };
1097 ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_READ_PDA, EZUSB_RID_READ_PDA);
1098 if (!ctx)
1099 return -ENOMEM;
1100
1101 /* wl_lkm does not include PDA size in the PDA area.
1102 * We will pad the information into pda, so other routines
1103 * don't have to be modified */
1104 pda[0] = cpu_to_le16(pda_len - 2);
1105 /* Includes CFG_PROD_DATA but not itself */
1106 pda[1] = cpu_to_le16(0x0800); /* CFG_PROD_DATA */
1107
1108 return ezusb_access_ltv(upriv, ctx, sizeof(data), &data,
1109 EZUSB_FRAME_CONTROL, &pda[2], pda_len - 4,
1110 NULL);
1111 }
1112
1113 static int ezusb_program_init(struct hermes *hw, u32 entry_point)
1114 {
1115 struct ezusb_priv *upriv = hw->priv;
1116 struct request_context *ctx;
1117 __le32 data = cpu_to_le32(entry_point);
1118
1119 ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_PROG_INIT, EZUSB_RID_ACK);
1120 if (!ctx)
1121 return -ENOMEM;
1122
1123 return ezusb_access_ltv(upriv, ctx, sizeof(data), &data,
1124 EZUSB_FRAME_CONTROL, NULL, 0, NULL);
1125 }
1126
1127 static int ezusb_program_end(struct hermes *hw)
1128 {
1129 struct ezusb_priv *upriv = hw->priv;
1130 struct request_context *ctx;
1131
1132 ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_PROG_END, EZUSB_RID_ACK);
1133 if (!ctx)
1134 return -ENOMEM;
1135
1136 return ezusb_access_ltv(upriv, ctx, 0, NULL,
1137 EZUSB_FRAME_CONTROL, NULL, 0, NULL);
1138 }
1139
1140 static int ezusb_program_bytes(struct hermes *hw, const char *buf,
1141 u32 addr, u32 len)
1142 {
1143 struct ezusb_priv *upriv = hw->priv;
1144 struct request_context *ctx;
1145 __le32 data = cpu_to_le32(addr);
1146 int err;
1147
1148 ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_PROG_SET_ADDR, EZUSB_RID_ACK);
1149 if (!ctx)
1150 return -ENOMEM;
1151
1152 err = ezusb_access_ltv(upriv, ctx, sizeof(data), &data,
1153 EZUSB_FRAME_CONTROL, NULL, 0, NULL);
1154 if (err)
1155 return err;
1156
1157 ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_PROG_BYTES, EZUSB_RID_ACK);
1158 if (!ctx)
1159 return -ENOMEM;
1160
1161 return ezusb_access_ltv(upriv, ctx, len, buf,
1162 EZUSB_FRAME_CONTROL, NULL, 0, NULL);
1163 }
1164
1165 static int ezusb_program(struct hermes *hw, const char *buf,
1166 u32 addr, u32 len)
1167 {
1168 u32 ch_addr;
1169 u32 ch_len;
1170 int err = 0;
1171
1172 /* We can only send 2048 bytes out of the bulk xmit at a time,
1173 * so we have to split any programming into chunks of <2048
1174 * bytes. */
1175
1176 ch_len = (len < MAX_DL_SIZE) ? len : MAX_DL_SIZE;
1177 ch_addr = addr;
1178
1179 while (ch_addr < (addr + len)) {
1180 pr_debug("Programming subblock of length %d "
1181 "to address 0x%08x. Data @ %p\n",
1182 ch_len, ch_addr, &buf[ch_addr - addr]);
1183
1184 err = ezusb_program_bytes(hw, &buf[ch_addr - addr],
1185 ch_addr, ch_len);
1186 if (err)
1187 break;
1188
1189 ch_addr += ch_len;
1190 ch_len = ((addr + len - ch_addr) < MAX_DL_SIZE) ?
1191 (addr + len - ch_addr) : MAX_DL_SIZE;
1192 }
1193
1194 return err;
1195 }
1196
1197 static netdev_tx_t ezusb_xmit(struct sk_buff *skb, struct net_device *dev)
1198 {
1199 struct orinoco_private *priv = ndev_priv(dev);
1200 struct net_device_stats *stats = &priv->stats;
1201 struct ezusb_priv *upriv = priv->card;
1202 u8 mic[MICHAEL_MIC_LEN+1];
1203 int err = 0;
1204 int tx_control;
1205 unsigned long flags;
1206 struct request_context *ctx;
1207 u8 *buf;
1208 int tx_size;
1209
1210 if (!netif_running(dev)) {
1211 printk(KERN_ERR "%s: Tx on stopped device!\n",
1212 dev->name);
1213 return NETDEV_TX_BUSY;
1214 }
1215
1216 if (netif_queue_stopped(dev)) {
1217 printk(KERN_DEBUG "%s: Tx while transmitter busy!\n",
1218 dev->name);
1219 return NETDEV_TX_BUSY;
1220 }
1221
1222 if (orinoco_lock(priv, &flags) != 0) {
1223 printk(KERN_ERR
1224 "%s: ezusb_xmit() called while hw_unavailable\n",
1225 dev->name);
1226 return NETDEV_TX_BUSY;
1227 }
1228
1229 if (!netif_carrier_ok(dev) ||
1230 (priv->iw_mode == NL80211_IFTYPE_MONITOR)) {
1231 /* Oops, the firmware hasn't established a connection,
1232 silently drop the packet (this seems to be the
1233 safest approach). */
1234 goto drop;
1235 }
1236
1237 /* Check packet length */
1238 if (skb->len < ETH_HLEN)
1239 goto drop;
1240
1241 ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_TX, 0);
1242 if (!ctx)
1243 goto busy;
1244
1245 memset(ctx->buf, 0, BULK_BUF_SIZE);
1246 buf = ctx->buf->data;
1247
1248 tx_control = 0;
1249
1250 err = orinoco_process_xmit_skb(skb, dev, priv, &tx_control,
1251 &mic[0]);
1252 if (err)
1253 goto drop;
1254
1255 {
1256 __le16 *tx_cntl = (__le16 *)buf;
1257 *tx_cntl = cpu_to_le16(tx_control);
1258 buf += sizeof(*tx_cntl);
1259 }
1260
1261 memcpy(buf, skb->data, skb->len);
1262 buf += skb->len;
1263
1264 if (tx_control & HERMES_TXCTRL_MIC) {
1265 u8 *m = mic;
1266 /* Mic has been offset so it can be copied to an even
1267 * address. We're copying eveything anyway, so we
1268 * don't need to copy that first byte. */
1269 if (skb->len % 2)
1270 m++;
1271 memcpy(buf, m, MICHAEL_MIC_LEN);
1272 buf += MICHAEL_MIC_LEN;
1273 }
1274
1275 /* Finally, we actually initiate the send */
1276 netif_stop_queue(dev);
1277
1278 /* The card may behave better if we send evenly sized usb transfers */
1279 tx_size = ALIGN(buf - ctx->buf->data, 2);
1280
1281 err = ezusb_access_ltv(upriv, ctx, tx_size, NULL,
1282 EZUSB_FRAME_DATA, NULL, 0, NULL);
1283
1284 if (err) {
1285 netif_start_queue(dev);
1286 if (net_ratelimit())
1287 printk(KERN_ERR "%s: Error %d transmitting packet\n",
1288 dev->name, err);
1289 goto busy;
1290 }
1291
1292 dev->trans_start = jiffies;
1293 stats->tx_bytes += skb->len;
1294 goto ok;
1295
1296 drop:
1297 stats->tx_errors++;
1298 stats->tx_dropped++;
1299
1300 ok:
1301 orinoco_unlock(priv, &flags);
1302 dev_kfree_skb(skb);
1303 return NETDEV_TX_OK;
1304
1305 busy:
1306 orinoco_unlock(priv, &flags);
1307 return NETDEV_TX_BUSY;
1308 }
1309
1310 static int ezusb_allocate(struct hermes *hw, u16 size, u16 *fid)
1311 {
1312 *fid = EZUSB_RID_TX;
1313 return 0;
1314 }
1315
1316
1317 static int ezusb_hard_reset(struct orinoco_private *priv)
1318 {
1319 struct ezusb_priv *upriv = priv->card;
1320 int retval = ezusb_8051_cpucs(upriv, 1);
1321
1322 if (retval < 0) {
1323 err("Failed to reset");
1324 return retval;
1325 }
1326
1327 retval = ezusb_8051_cpucs(upriv, 0);
1328 if (retval < 0) {
1329 err("Failed to unreset");
1330 return retval;
1331 }
1332
1333 dbg("sending control message");
1334 retval = usb_control_msg(upriv->udev,
1335 usb_sndctrlpipe(upriv->udev, 0),
1336 EZUSB_REQUEST_TRIGER,
1337 USB_TYPE_VENDOR | USB_RECIP_DEVICE |
1338 USB_DIR_OUT, 0x0, 0x0, NULL, 0,
1339 DEF_TIMEOUT);
1340 if (retval < 0) {
1341 err("EZUSB_REQUEST_TRIGER failed retval %d", retval);
1342 return retval;
1343 }
1344 #if 0
1345 dbg("Sending EZUSB_REQUEST_TRIG_AC");
1346 retval = usb_control_msg(upriv->udev,
1347 usb_sndctrlpipe(upriv->udev, 0),
1348 EZUSB_REQUEST_TRIG_AC,
1349 USB_TYPE_VENDOR | USB_RECIP_DEVICE |
1350 USB_DIR_OUT, 0x00FA, 0x0, NULL, 0,
1351 DEF_TIMEOUT);
1352 if (retval < 0) {
1353 err("EZUSB_REQUEST_TRIG_AC failed retval %d", retval);
1354 return retval;
1355 }
1356 #endif
1357
1358 return 0;
1359 }
1360
1361
1362 static int ezusb_init(hermes_t *hw)
1363 {
1364 struct ezusb_priv *upriv = hw->priv;
1365 int retval;
1366
1367 BUG_ON(in_interrupt());
1368 BUG_ON(!upriv);
1369
1370 upriv->reply_count = 0;
1371 /* Write the MAGIC number on the simulated registers to keep
1372 * orinoco.c happy */
1373 hermes_write_regn(hw, SWSUPPORT0, HERMES_MAGIC);
1374 hermes_write_regn(hw, RXFID, EZUSB_RID_RX);
1375
1376 usb_kill_urb(upriv->read_urb);
1377 ezusb_submit_in_urb(upriv);
1378
1379 retval = ezusb_write_ltv(hw, 0, EZUSB_RID_INIT1,
1380 HERMES_BYTES_TO_RECLEN(2), "\x10\x00");
1381 if (retval < 0) {
1382 printk(KERN_ERR PFX "EZUSB_RID_INIT1 error %d\n", retval);
1383 return retval;
1384 }
1385
1386 retval = ezusb_docmd_wait(hw, HERMES_CMD_INIT, 0, NULL);
1387 if (retval < 0) {
1388 printk(KERN_ERR PFX "HERMES_CMD_INIT error %d\n", retval);
1389 return retval;
1390 }
1391
1392 return 0;
1393 }
1394
1395 static void ezusb_bulk_in_callback(struct urb *urb)
1396 {
1397 struct ezusb_priv *upriv = (struct ezusb_priv *) urb->context;
1398 struct ezusb_packet *ans = urb->transfer_buffer;
1399 u16 crc;
1400 u16 hermes_rid;
1401
1402 if (upriv->udev == NULL) {
1403 dbg("disconnected");
1404 return;
1405 }
1406
1407 if (urb->status == -ETIMEDOUT) {
1408 /* When a device gets unplugged we get this every time
1409 * we resubmit, flooding the logs. Since we don't use
1410 * USB timeouts, it shouldn't happen any other time*/
1411 pr_warning("%s: urb timed out, not resubmiting", __func__);
1412 return;
1413 }
1414 if (urb->status == -ECONNABORTED) {
1415 pr_warning("%s: connection abort, resubmiting urb",
1416 __func__);
1417 goto resubmit;
1418 }
1419 if ((urb->status == -EILSEQ)
1420 || (urb->status == -ENOENT)
1421 || (urb->status == -ECONNRESET)) {
1422 dbg("status %d, not resubmiting", urb->status);
1423 return;
1424 }
1425 if (urb->status)
1426 dbg("status: %d length: %d",
1427 urb->status, urb->actual_length);
1428 if (urb->actual_length < sizeof(*ans)) {
1429 err("%s: short read, ignoring", __func__);
1430 goto resubmit;
1431 }
1432 crc = build_crc(ans);
1433 if (le16_to_cpu(ans->crc) != crc) {
1434 err("CRC error, ignoring packet");
1435 goto resubmit;
1436 }
1437
1438 hermes_rid = le16_to_cpu(ans->hermes_rid);
1439 if ((hermes_rid != EZUSB_RID_RX) && !EZUSB_IS_INFO(hermes_rid)) {
1440 ezusb_request_in_callback(upriv, urb);
1441 } else if (upriv->dev) {
1442 struct net_device *dev = upriv->dev;
1443 struct orinoco_private *priv = ndev_priv(dev);
1444 hermes_t *hw = &priv->hw;
1445
1446 if (hermes_rid == EZUSB_RID_RX) {
1447 __orinoco_ev_rx(dev, hw);
1448 } else {
1449 hermes_write_regn(hw, INFOFID,
1450 le16_to_cpu(ans->hermes_rid));
1451 __orinoco_ev_info(dev, hw);
1452 }
1453 }
1454
1455 resubmit:
1456 if (upriv->udev)
1457 ezusb_submit_in_urb(upriv);
1458 }
1459
1460 static inline void ezusb_delete(struct ezusb_priv *upriv)
1461 {
1462 struct net_device *dev;
1463 struct list_head *item;
1464 struct list_head *tmp_item;
1465 unsigned long flags;
1466
1467 BUG_ON(in_interrupt());
1468 BUG_ON(!upriv);
1469
1470 dev = upriv->dev;
1471 mutex_lock(&upriv->mtx);
1472
1473 upriv->udev = NULL; /* No timer will be rearmed from here */
1474
1475 usb_kill_urb(upriv->read_urb);
1476
1477 spin_lock_irqsave(&upriv->req_lock, flags);
1478 list_for_each_safe(item, tmp_item, &upriv->req_active) {
1479 struct request_context *ctx;
1480 int err;
1481
1482 ctx = list_entry(item, struct request_context, list);
1483 atomic_inc(&ctx->refcount);
1484
1485 ctx->outurb->transfer_flags |= URB_ASYNC_UNLINK;
1486 err = usb_unlink_urb(ctx->outurb);
1487
1488 spin_unlock_irqrestore(&upriv->req_lock, flags);
1489 if (err == -EINPROGRESS)
1490 wait_for_completion(&ctx->done);
1491
1492 del_timer_sync(&ctx->timer);
1493 /* FIXME: there is an slight chance for the irq handler to
1494 * be running */
1495 if (!list_empty(&ctx->list))
1496 ezusb_ctx_complete(ctx);
1497
1498 ezusb_request_context_put(ctx);
1499 spin_lock_irqsave(&upriv->req_lock, flags);
1500 }
1501 spin_unlock_irqrestore(&upriv->req_lock, flags);
1502
1503 list_for_each_safe(item, tmp_item, &upriv->req_pending)
1504 ezusb_ctx_complete(list_entry(item,
1505 struct request_context, list));
1506
1507 if (upriv->read_urb->status == -EINPROGRESS)
1508 printk(KERN_ERR PFX "Some URB in progress\n");
1509
1510 mutex_unlock(&upriv->mtx);
1511
1512 kfree(upriv->read_urb->transfer_buffer);
1513 if (upriv->bap_buf != NULL)
1514 kfree(upriv->bap_buf);
1515 if (upriv->read_urb != NULL)
1516 usb_free_urb(upriv->read_urb);
1517 if (upriv->dev) {
1518 struct orinoco_private *priv = ndev_priv(upriv->dev);
1519 orinoco_if_del(priv);
1520 free_orinocodev(priv);
1521 }
1522 }
1523
1524 static void ezusb_lock_irqsave(spinlock_t *lock,
1525 unsigned long *flags) __acquires(lock)
1526 {
1527 spin_lock_bh(lock);
1528 }
1529
1530 static void ezusb_unlock_irqrestore(spinlock_t *lock,
1531 unsigned long *flags) __releases(lock)
1532 {
1533 spin_unlock_bh(lock);
1534 }
1535
1536 static void ezusb_lock_irq(spinlock_t *lock) __acquires(lock)
1537 {
1538 spin_lock_bh(lock);
1539 }
1540
1541 static void ezusb_unlock_irq(spinlock_t *lock) __releases(lock)
1542 {
1543 spin_unlock_bh(lock);
1544 }
1545
1546 static const struct hermes_ops ezusb_ops = {
1547 .init = ezusb_init,
1548 .cmd_wait = ezusb_docmd_wait,
1549 .init_cmd_wait = ezusb_doicmd_wait,
1550 .allocate = ezusb_allocate,
1551 .read_ltv = ezusb_read_ltv,
1552 .write_ltv = ezusb_write_ltv,
1553 .bap_pread = ezusb_bap_pread,
1554 .read_pda = ezusb_read_pda,
1555 .program_init = ezusb_program_init,
1556 .program_end = ezusb_program_end,
1557 .program = ezusb_program,
1558 .lock_irqsave = ezusb_lock_irqsave,
1559 .unlock_irqrestore = ezusb_unlock_irqrestore,
1560 .lock_irq = ezusb_lock_irq,
1561 .unlock_irq = ezusb_unlock_irq,
1562 };
1563
1564 static const struct net_device_ops ezusb_netdev_ops = {
1565 .ndo_open = orinoco_open,
1566 .ndo_stop = orinoco_stop,
1567 .ndo_start_xmit = ezusb_xmit,
1568 .ndo_set_multicast_list = orinoco_set_multicast_list,
1569 .ndo_change_mtu = orinoco_change_mtu,
1570 .ndo_set_mac_address = eth_mac_addr,
1571 .ndo_validate_addr = eth_validate_addr,
1572 .ndo_tx_timeout = orinoco_tx_timeout,
1573 .ndo_get_stats = orinoco_get_stats,
1574 };
1575
1576 static int ezusb_probe(struct usb_interface *interface,
1577 const struct usb_device_id *id)
1578 {
1579 struct usb_device *udev = interface_to_usbdev(interface);
1580 struct orinoco_private *priv;
1581 hermes_t *hw;
1582 struct ezusb_priv *upriv = NULL;
1583 struct usb_interface_descriptor *iface_desc;
1584 struct usb_endpoint_descriptor *ep;
1585 const struct firmware *fw_entry;
1586 int retval = 0;
1587 int i;
1588
1589 priv = alloc_orinocodev(sizeof(*upriv), &udev->dev,
1590 ezusb_hard_reset, NULL);
1591 if (!priv) {
1592 err("Couldn't allocate orinocodev");
1593 goto exit;
1594 }
1595
1596 hw = &priv->hw;
1597
1598 upriv = priv->card;
1599
1600 mutex_init(&upriv->mtx);
1601 spin_lock_init(&upriv->reply_count_lock);
1602
1603 spin_lock_init(&upriv->req_lock);
1604 INIT_LIST_HEAD(&upriv->req_pending);
1605 INIT_LIST_HEAD(&upriv->req_active);
1606
1607 upriv->udev = udev;
1608
1609 hw->iobase = (void __force __iomem *) &upriv->hermes_reg_fake;
1610 hw->reg_spacing = HERMES_16BIT_REGSPACING;
1611 hw->priv = upriv;
1612 hw->ops = &ezusb_ops;
1613
1614 /* set up the endpoint information */
1615 /* check out the endpoints */
1616
1617 iface_desc = &interface->altsetting[0].desc;
1618 for (i = 0; i < iface_desc->bNumEndpoints; ++i) {
1619 ep = &interface->altsetting[0].endpoint[i].desc;
1620
1621 if (((ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
1622 == USB_DIR_IN) &&
1623 ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
1624 == USB_ENDPOINT_XFER_BULK)) {
1625 /* we found a bulk in endpoint */
1626 if (upriv->read_urb != NULL) {
1627 pr_warning("Found a second bulk in ep, ignored");
1628 continue;
1629 }
1630
1631 upriv->read_urb = usb_alloc_urb(0, GFP_KERNEL);
1632 if (!upriv->read_urb) {
1633 err("No free urbs available");
1634 goto error;
1635 }
1636 if (le16_to_cpu(ep->wMaxPacketSize) != 64)
1637 pr_warning("bulk in: wMaxPacketSize!= 64");
1638 if (ep->bEndpointAddress != (2 | USB_DIR_IN))
1639 pr_warning("bulk in: bEndpointAddress: %d",
1640 ep->bEndpointAddress);
1641 upriv->read_pipe = usb_rcvbulkpipe(udev,
1642 ep->
1643 bEndpointAddress);
1644 upriv->read_urb->transfer_buffer =
1645 kmalloc(BULK_BUF_SIZE, GFP_KERNEL);
1646 if (!upriv->read_urb->transfer_buffer) {
1647 err("Couldn't allocate IN buffer");
1648 goto error;
1649 }
1650 }
1651
1652 if (((ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
1653 == USB_DIR_OUT) &&
1654 ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
1655 == USB_ENDPOINT_XFER_BULK)) {
1656 /* we found a bulk out endpoint */
1657 if (upriv->bap_buf != NULL) {
1658 pr_warning("Found a second bulk out ep, ignored");
1659 continue;
1660 }
1661
1662 if (le16_to_cpu(ep->wMaxPacketSize) != 64)
1663 pr_warning("bulk out: wMaxPacketSize != 64");
1664 if (ep->bEndpointAddress != 2)
1665 pr_warning("bulk out: bEndpointAddress: %d",
1666 ep->bEndpointAddress);
1667 upriv->write_pipe = usb_sndbulkpipe(udev,
1668 ep->
1669 bEndpointAddress);
1670 upriv->bap_buf = kmalloc(BULK_BUF_SIZE, GFP_KERNEL);
1671 if (!upriv->bap_buf) {
1672 err("Couldn't allocate bulk_out_buffer");
1673 goto error;
1674 }
1675 }
1676 }
1677 if (!upriv->bap_buf || !upriv->read_urb) {
1678 err("Didn't find the required bulk endpoints");
1679 goto error;
1680 }
1681
1682 if (request_firmware(&fw_entry, "orinoco_ezusb_fw",
1683 &interface->dev) == 0) {
1684 firmware.size = fw_entry->size;
1685 firmware.code = fw_entry->data;
1686 }
1687 if (firmware.size && firmware.code) {
1688 ezusb_firmware_download(upriv, &firmware);
1689 } else {
1690 err("No firmware to download");
1691 goto error;
1692 }
1693
1694 if (ezusb_hard_reset(priv) < 0) {
1695 err("Cannot reset the device");
1696 goto error;
1697 }
1698
1699 /* If the firmware is already downloaded orinoco.c will call
1700 * ezusb_init but if the firmware is not already there, that will make
1701 * the kernel very unstable, so we try initializing here and quit in
1702 * case of error */
1703 if (ezusb_init(hw) < 0) {
1704 err("Couldn't initialize the device");
1705 err("Firmware may not be downloaded or may be wrong.");
1706 goto error;
1707 }
1708
1709 /* Initialise the main driver */
1710 if (orinoco_init(priv) != 0) {
1711 err("orinoco_init() failed\n");
1712 goto error;
1713 }
1714
1715 if (orinoco_if_add(priv, 0, 0, &ezusb_netdev_ops) != 0) {
1716 upriv->dev = NULL;
1717 err("%s: orinoco_if_add() failed", __func__);
1718 goto error;
1719 }
1720 upriv->dev = priv->ndev;
1721
1722 goto exit;
1723
1724 error:
1725 ezusb_delete(upriv);
1726 if (upriv->dev) {
1727 /* upriv->dev was 0, so ezusb_delete() didn't free it */
1728 free_orinocodev(priv);
1729 }
1730 upriv = NULL;
1731 retval = -EFAULT;
1732 exit:
1733 if (fw_entry) {
1734 firmware.code = NULL;
1735 firmware.size = 0;
1736 release_firmware(fw_entry);
1737 }
1738 usb_set_intfdata(interface, upriv);
1739 return retval;
1740 }
1741
1742
1743 static void ezusb_disconnect(struct usb_interface *intf)
1744 {
1745 struct ezusb_priv *upriv = usb_get_intfdata(intf);
1746 usb_set_intfdata(intf, NULL);
1747 ezusb_delete(upriv);
1748 printk(KERN_INFO PFX "Disconnected\n");
1749 }
1750
1751
1752 /* usb specific object needed to register this driver with the usb subsystem */
1753 static struct usb_driver orinoco_driver = {
1754 .name = DRIVER_NAME,
1755 .probe = ezusb_probe,
1756 .disconnect = ezusb_disconnect,
1757 .id_table = ezusb_table,
1758 };
1759
1760 /* Can't be declared "const" or the whole __initdata section will
1761 * become const */
1762 static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
1763 " (Manuel Estrada Sainz)";
1764
1765 static int __init ezusb_module_init(void)
1766 {
1767 int err;
1768
1769 printk(KERN_DEBUG "%s\n", version);
1770
1771 /* register this driver with the USB subsystem */
1772 err = usb_register(&orinoco_driver);
1773 if (err < 0) {
1774 printk(KERN_ERR PFX "usb_register failed, error %d\n",
1775 err);
1776 return err;
1777 }
1778
1779 return 0;
1780 }
1781
1782 static void __exit ezusb_module_exit(void)
1783 {
1784 /* deregister this driver with the USB subsystem */
1785 usb_deregister(&orinoco_driver);
1786 }
1787
1788
1789 module_init(ezusb_module_init);
1790 module_exit(ezusb_module_exit);
1791
1792 MODULE_AUTHOR("Manuel Estrada Sainz");
1793 MODULE_DESCRIPTION
1794 ("Driver for Orinoco wireless LAN cards using EZUSB bridge");
1795 MODULE_LICENSE("Dual MPL/GPL");
orinoco usb branch