USB: rename usb_buffer_alloc() and usb_buffer_free() users
[linux-2.6.git] / drivers / net / usb / kaweth.c
1 /****************************************************************
2  *
3  *     kaweth.c - driver for KL5KUSB101 based USB->Ethernet
4  *
5  *     (c) 2000 Interlan Communications
6  *     (c) 2000 Stephane Alnet
7  *     (C) 2001 Brad Hards
8  *     (C) 2002 Oliver Neukum
9  *
10  *     Original author: The Zapman <zapman@interlan.net>
11  *     Inspired by, and much credit goes to Michael Rothwell
12  *     <rothwell@interlan.net> for the test equipment, help, and patience
13  *     Based off of (and with thanks to) Petko Manolov's pegaus.c driver.
14  *     Also many thanks to Joel Silverman and Ed Surprenant at Kawasaki
15  *     for providing the firmware and driver resources.
16  *
17  *     This program is free software; you can redistribute it and/or
18  *     modify it under the terms of the GNU General Public License as
19  *     published by the Free Software Foundation; either version 2, or
20  *     (at your option) any later version.
21  *
22  *     This program is distributed in the hope that it will be useful,
23  *     but WITHOUT ANY WARRANTY; without even the implied warranty of
24  *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
25  *     GNU General Public License for more details.
26  *
27  *     You should have received a copy of the GNU General Public License
28  *     along with this program; if not, write to the Free Software Foundation,
29  *     Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
30  *
31  ****************************************************************/
32
33 /* TODO:
34  * Develop test procedures for USB net interfaces
35  * Run test procedures
36  * Fix bugs from previous two steps
37  * Snoop other OSs for any tricks we're not doing
38  * Reduce arbitrary timeouts
39  * Smart multicast support
40  * Temporary MAC change support
41  * Tunable SOFs parameter - ioctl()?
42  * Ethernet stats collection
43  * Code formatting improvements
44  */
45
46 #include <linux/module.h>
47 #include <linux/slab.h>
48 #include <linux/string.h>
49 #include <linux/init.h>
50 #include <linux/delay.h>
51 #include <linux/netdevice.h>
52 #include <linux/etherdevice.h>
53 #include <linux/usb.h>
54 #include <linux/types.h>
55 #include <linux/ethtool.h>
56 #include <linux/dma-mapping.h>
57 #include <linux/wait.h>
58 #include <linux/firmware.h>
59 #include <asm/uaccess.h>
60 #include <asm/byteorder.h>
61
62 #undef DEBUG
63
64 #define KAWETH_MTU                      1514
65 #define KAWETH_BUF_SIZE                 1664
66 #define KAWETH_TX_TIMEOUT               (5 * HZ)
67 #define KAWETH_SCRATCH_SIZE             32
68 #define KAWETH_FIRMWARE_BUF_SIZE        4096
69 #define KAWETH_CONTROL_TIMEOUT          (30000)
70
71 #define KAWETH_STATUS_BROKEN            0x0000001
72 #define KAWETH_STATUS_CLOSING           0x0000002
73 #define KAWETH_STATUS_SUSPENDING        0x0000004
74
75 #define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING)
76
77 #define KAWETH_PACKET_FILTER_PROMISCUOUS        0x01
78 #define KAWETH_PACKET_FILTER_ALL_MULTICAST      0x02
79 #define KAWETH_PACKET_FILTER_DIRECTED           0x04
80 #define KAWETH_PACKET_FILTER_BROADCAST          0x08
81 #define KAWETH_PACKET_FILTER_MULTICAST          0x10
82
83 /* Table 7 */
84 #define KAWETH_COMMAND_GET_ETHERNET_DESC        0x00
85 #define KAWETH_COMMAND_MULTICAST_FILTERS        0x01
86 #define KAWETH_COMMAND_SET_PACKET_FILTER        0x02
87 #define KAWETH_COMMAND_STATISTICS               0x03
88 #define KAWETH_COMMAND_SET_TEMP_MAC             0x06
89 #define KAWETH_COMMAND_GET_TEMP_MAC             0x07
90 #define KAWETH_COMMAND_SET_URB_SIZE             0x08
91 #define KAWETH_COMMAND_SET_SOFS_WAIT            0x09
92 #define KAWETH_COMMAND_SCAN                     0xFF
93
94 #define KAWETH_SOFS_TO_WAIT                     0x05
95
96 #define INTBUFFERSIZE                           4
97
98 #define STATE_OFFSET                            0
99 #define STATE_MASK                              0x40
100 #define STATE_SHIFT                             5
101
102 #define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED)
103
104
105 MODULE_AUTHOR("Michael Zappe <zapman@interlan.net>, Stephane Alnet <stephane@u-picardie.fr>, Brad Hards <bhards@bigpond.net.au> and Oliver Neukum <oliver@neukum.org>");
106 MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver");
107 MODULE_LICENSE("GPL");
108 MODULE_FIRMWARE("kaweth/new_code.bin");
109 MODULE_FIRMWARE("kaweth/new_code_fix.bin");
110 MODULE_FIRMWARE("kaweth/trigger_code.bin");
111 MODULE_FIRMWARE("kaweth/trigger_code_fix.bin");
112
113 static const char driver_name[] = "kaweth";
114
115 static int kaweth_probe(
116                 struct usb_interface *intf,
117                 const struct usb_device_id *id  /* from id_table */
118         );
119 static void kaweth_disconnect(struct usb_interface *intf);
120 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
121                                        unsigned int pipe,
122                                        struct usb_ctrlrequest *cmd, void *data,
123                                        int len, int timeout);
124 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message);
125 static int kaweth_resume(struct usb_interface *intf);
126
127 /****************************************************************
128  *     usb_device_id
129  ****************************************************************/
130 static struct usb_device_id usb_klsi_table[] = {
131         { USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */
132         { USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */
133         { USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */
134         { USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */
135         { USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */
136         { USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */
137         { USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */
138         { USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */
139         { USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */
140         { USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */
141         { USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */
142         { USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */
143         { USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */
144         { USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */
145         { USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */
146         { USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */
147         { USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */
148         { USB_DEVICE(0x07c9, 0xb010) }, /* Allied Telesyn AT-USB10 USB Ethernet Adapter */
149         { USB_DEVICE(0x0846, 0x1001) }, /* NetGear EA-101 */
150         { USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */
151         { USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */
152         { USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */
153         { USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */
154         { USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */
155         { USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */
156         { USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */
157         { USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */
158         { USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */
159         { USB_DEVICE(0x1485, 0x0001) }, /* Silicom U2E */
160         { USB_DEVICE(0x1485, 0x0002) }, /* Psion Dacom Gold Port Ethernet */
161         { USB_DEVICE(0x1645, 0x0005) }, /* Entrega E45 */
162         { USB_DEVICE(0x1645, 0x0008) }, /* Entrega USB Ethernet Adapter */
163         { USB_DEVICE(0x1645, 0x8005) }, /* PortGear Ethernet Adapter */
164         { USB_DEVICE(0x1668, 0x0323) }, /* Actiontec USB Ethernet */
165         { USB_DEVICE(0x2001, 0x4000) }, /* D-link DSB-650C */
166         {} /* Null terminator */
167 };
168
169 MODULE_DEVICE_TABLE (usb, usb_klsi_table);
170
171 /****************************************************************
172  *     kaweth_driver
173  ****************************************************************/
174 static struct usb_driver kaweth_driver = {
175         .name =         driver_name,
176         .probe =        kaweth_probe,
177         .disconnect =   kaweth_disconnect,
178         .suspend =      kaweth_suspend,
179         .resume =       kaweth_resume,
180         .id_table =     usb_klsi_table,
181         .supports_autosuspend = 1,
182 };
183
184 typedef __u8 eth_addr_t[6];
185
186 /****************************************************************
187  *     usb_eth_dev
188  ****************************************************************/
189 struct usb_eth_dev {
190         char *name;
191         __u16 vendor;
192         __u16 device;
193         void *pdata;
194 };
195
196 /****************************************************************
197  *     kaweth_ethernet_configuration
198  *     Refer Table 8
199  ****************************************************************/
200 struct kaweth_ethernet_configuration
201 {
202         __u8 size;
203         __u8 reserved1;
204         __u8 reserved2;
205         eth_addr_t hw_addr;
206         __u32 statistics_mask;
207         __le16 segment_size;
208         __u16 max_multicast_filters;
209         __u8 reserved3;
210 } __attribute__ ((packed));
211
212 /****************************************************************
213  *     kaweth_device
214  ****************************************************************/
215 struct kaweth_device
216 {
217         spinlock_t device_lock;
218
219         __u32 status;
220         int end;
221         int suspend_lowmem_rx;
222         int suspend_lowmem_ctrl;
223         int linkstate;
224         int opened;
225         struct delayed_work lowmem_work;
226
227         struct usb_device *dev;
228         struct usb_interface *intf;
229         struct net_device *net;
230         wait_queue_head_t term_wait;
231
232         struct urb *rx_urb;
233         struct urb *tx_urb;
234         struct urb *irq_urb;
235
236         dma_addr_t intbufferhandle;
237         __u8 *intbuffer;
238         dma_addr_t rxbufferhandle;
239         __u8 *rx_buf;
240
241         
242         struct sk_buff *tx_skb;
243
244         __u8 *firmware_buf;
245         __u8 scratch[KAWETH_SCRATCH_SIZE];
246         __u16 packet_filter_bitmap;
247
248         struct kaweth_ethernet_configuration configuration;
249
250         struct net_device_stats stats;
251 };
252
253 /****************************************************************
254  *     kaweth_control
255  ****************************************************************/
256 static int kaweth_control(struct kaweth_device *kaweth,
257                           unsigned int pipe,
258                           __u8 request,
259                           __u8 requesttype,
260                           __u16 value,
261                           __u16 index,
262                           void *data,
263                           __u16 size,
264                           int timeout)
265 {
266         struct usb_ctrlrequest *dr;
267         int retval;
268
269         dbg("kaweth_control()");
270
271         if(in_interrupt()) {
272                 dbg("in_interrupt()");
273                 return -EBUSY;
274         }
275
276         dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
277
278         if (!dr) {
279                 dbg("kmalloc() failed");
280                 return -ENOMEM;
281         }
282
283         dr->bRequestType = requesttype;
284         dr->bRequest = request;
285         dr->wValue = cpu_to_le16(value);
286         dr->wIndex = cpu_to_le16(index);
287         dr->wLength = cpu_to_le16(size);
288
289         retval = kaweth_internal_control_msg(kaweth->dev,
290                                              pipe,
291                                              dr,
292                                              data,
293                                              size,
294                                              timeout);
295
296         kfree(dr);
297         return retval;
298 }
299
300 /****************************************************************
301  *     kaweth_read_configuration
302  ****************************************************************/
303 static int kaweth_read_configuration(struct kaweth_device *kaweth)
304 {
305         int retval;
306
307         dbg("Reading kaweth configuration");
308
309         retval = kaweth_control(kaweth,
310                                 usb_rcvctrlpipe(kaweth->dev, 0),
311                                 KAWETH_COMMAND_GET_ETHERNET_DESC,
312                                 USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE,
313                                 0,
314                                 0,
315                                 (void *)&kaweth->configuration,
316                                 sizeof(kaweth->configuration),
317                                 KAWETH_CONTROL_TIMEOUT);
318
319         return retval;
320 }
321
322 /****************************************************************
323  *     kaweth_set_urb_size
324  ****************************************************************/
325 static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size)
326 {
327         int retval;
328
329         dbg("Setting URB size to %d", (unsigned)urb_size);
330
331         retval = kaweth_control(kaweth,
332                                 usb_sndctrlpipe(kaweth->dev, 0),
333                                 KAWETH_COMMAND_SET_URB_SIZE,
334                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
335                                 urb_size,
336                                 0,
337                                 (void *)&kaweth->scratch,
338                                 0,
339                                 KAWETH_CONTROL_TIMEOUT);
340
341         return retval;
342 }
343
344 /****************************************************************
345  *     kaweth_set_sofs_wait
346  ****************************************************************/
347 static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait)
348 {
349         int retval;
350
351         dbg("Set SOFS wait to %d", (unsigned)sofs_wait);
352
353         retval = kaweth_control(kaweth,
354                                 usb_sndctrlpipe(kaweth->dev, 0),
355                                 KAWETH_COMMAND_SET_SOFS_WAIT,
356                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
357                                 sofs_wait,
358                                 0,
359                                 (void *)&kaweth->scratch,
360                                 0,
361                                 KAWETH_CONTROL_TIMEOUT);
362
363         return retval;
364 }
365
366 /****************************************************************
367  *     kaweth_set_receive_filter
368  ****************************************************************/
369 static int kaweth_set_receive_filter(struct kaweth_device *kaweth,
370                                      __u16 receive_filter)
371 {
372         int retval;
373
374         dbg("Set receive filter to %d", (unsigned)receive_filter);
375
376         retval = kaweth_control(kaweth,
377                                 usb_sndctrlpipe(kaweth->dev, 0),
378                                 KAWETH_COMMAND_SET_PACKET_FILTER,
379                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
380                                 receive_filter,
381                                 0,
382                                 (void *)&kaweth->scratch,
383                                 0,
384                                 KAWETH_CONTROL_TIMEOUT);
385
386         return retval;
387 }
388
389 /****************************************************************
390  *     kaweth_download_firmware
391  ****************************************************************/
392 static int kaweth_download_firmware(struct kaweth_device *kaweth,
393                                     const char *fwname,
394                                     __u8 interrupt,
395                                     __u8 type)
396 {
397         const struct firmware *fw;
398         int data_len;
399         int ret;
400
401         ret = request_firmware(&fw, fwname, &kaweth->dev->dev);
402         if (ret) {
403                 err("Firmware request failed\n");
404                 return ret;
405         }
406
407         if (fw->size > KAWETH_FIRMWARE_BUF_SIZE) {
408                 err("Firmware too big: %zu", fw->size);
409                 return -ENOSPC;
410         }
411         data_len = fw->size;
412         memcpy(kaweth->firmware_buf, fw->data, fw->size);
413
414         release_firmware(fw);
415
416         kaweth->firmware_buf[2] = (data_len & 0xFF) - 7;
417         kaweth->firmware_buf[3] = data_len >> 8;
418         kaweth->firmware_buf[4] = type;
419         kaweth->firmware_buf[5] = interrupt;
420
421         dbg("High: %i, Low:%i", kaweth->firmware_buf[3],
422                    kaweth->firmware_buf[2]);
423
424         dbg("Downloading firmware at %p to kaweth device at %p",
425             fw->data, kaweth);
426         dbg("Firmware length: %d", data_len);
427
428         return kaweth_control(kaweth,
429                               usb_sndctrlpipe(kaweth->dev, 0),
430                               KAWETH_COMMAND_SCAN,
431                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
432                               0,
433                               0,
434                               (void *)kaweth->firmware_buf,
435                               data_len,
436                               KAWETH_CONTROL_TIMEOUT);
437 }
438
439 /****************************************************************
440  *     kaweth_trigger_firmware
441  ****************************************************************/
442 static int kaweth_trigger_firmware(struct kaweth_device *kaweth,
443                                    __u8 interrupt)
444 {
445         kaweth->firmware_buf[0] = 0xB6;
446         kaweth->firmware_buf[1] = 0xC3;
447         kaweth->firmware_buf[2] = 0x01;
448         kaweth->firmware_buf[3] = 0x00;
449         kaweth->firmware_buf[4] = 0x06;
450         kaweth->firmware_buf[5] = interrupt;
451         kaweth->firmware_buf[6] = 0x00;
452         kaweth->firmware_buf[7] = 0x00;
453
454         dbg("Triggering firmware");
455
456         return kaweth_control(kaweth,
457                               usb_sndctrlpipe(kaweth->dev, 0),
458                               KAWETH_COMMAND_SCAN,
459                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
460                               0,
461                               0,
462                               (void *)kaweth->firmware_buf,
463                               8,
464                               KAWETH_CONTROL_TIMEOUT);
465 }
466
467 /****************************************************************
468  *     kaweth_reset
469  ****************************************************************/
470 static int kaweth_reset(struct kaweth_device *kaweth)
471 {
472         int result;
473
474         dbg("kaweth_reset(%p)", kaweth);
475         result = usb_reset_configuration(kaweth->dev);
476         mdelay(10);
477
478         dbg("kaweth_reset() returns %d.",result);
479
480         return result;
481 }
482
483 static void kaweth_usb_receive(struct urb *);
484 static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t);
485
486 /****************************************************************
487         int_callback
488 *****************************************************************/
489
490 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf)
491 {
492         int status;
493
494         status = usb_submit_urb (kaweth->irq_urb, mf);
495         if (unlikely(status == -ENOMEM)) {
496                 kaweth->suspend_lowmem_ctrl = 1;
497                 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
498         } else {
499                 kaweth->suspend_lowmem_ctrl = 0;
500         }
501
502         if (status)
503                 err ("can't resubmit intr, %s-%s, status %d",
504                                 kaweth->dev->bus->bus_name,
505                                 kaweth->dev->devpath, status);
506 }
507
508 static void int_callback(struct urb *u)
509 {
510         struct kaweth_device *kaweth = u->context;
511         int act_state;
512         int status = u->status;
513
514         switch (status) {
515         case 0:                 /* success */
516                 break;
517         case -ECONNRESET:       /* unlink */
518         case -ENOENT:
519         case -ESHUTDOWN:
520                 return;
521         /* -EPIPE:  should clear the halt */
522         default:                /* error */
523                 goto resubmit;
524         }
525
526         /* we check the link state to report changes */
527         if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) {
528                 if (act_state)
529                         netif_carrier_on(kaweth->net);
530                 else
531                         netif_carrier_off(kaweth->net);
532
533                 kaweth->linkstate = act_state;
534         }
535 resubmit:
536         kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC);
537 }
538
539 static void kaweth_resubmit_tl(struct work_struct *work)
540 {
541         struct kaweth_device *kaweth =
542                 container_of(work, struct kaweth_device, lowmem_work.work);
543
544         if (IS_BLOCKED(kaweth->status))
545                 return;
546
547         if (kaweth->suspend_lowmem_rx)
548                 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
549
550         if (kaweth->suspend_lowmem_ctrl)
551                 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
552 }
553
554
555 /****************************************************************
556  *     kaweth_resubmit_rx_urb
557  ****************************************************************/
558 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth,
559                                                 gfp_t mem_flags)
560 {
561         int result;
562
563         usb_fill_bulk_urb(kaweth->rx_urb,
564                       kaweth->dev,
565                       usb_rcvbulkpipe(kaweth->dev, 1),
566                       kaweth->rx_buf,
567                       KAWETH_BUF_SIZE,
568                       kaweth_usb_receive,
569                       kaweth);
570         kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
571         kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle;
572
573         if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) {
574                 if (result == -ENOMEM) {
575                         kaweth->suspend_lowmem_rx = 1;
576                         schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
577                 }
578                 err("resubmitting rx_urb %d failed", result);
579         } else {
580                 kaweth->suspend_lowmem_rx = 0;
581         }
582
583         return result;
584 }
585
586 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth);
587
588 /****************************************************************
589  *     kaweth_usb_receive
590  ****************************************************************/
591 static void kaweth_usb_receive(struct urb *urb)
592 {
593         struct kaweth_device *kaweth = urb->context;
594         struct net_device *net = kaweth->net;
595         int status = urb->status;
596
597         int count = urb->actual_length;
598         int count2 = urb->transfer_buffer_length;
599
600         __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf);
601
602         struct sk_buff *skb;
603
604         if (unlikely(status == -EPIPE)) {
605                 kaweth->stats.rx_errors++;
606                 kaweth->end = 1;
607                 wake_up(&kaweth->term_wait);
608                 dbg("Status was -EPIPE.");
609                 return;
610         }
611         if (unlikely(status == -ECONNRESET || status == -ESHUTDOWN)) {
612                 /* we are killed - set a flag and wake the disconnect handler */
613                 kaweth->end = 1;
614                 wake_up(&kaweth->term_wait);
615                 dbg("Status was -ECONNRESET or -ESHUTDOWN.");
616                 return;
617         }
618         if (unlikely(status == -EPROTO || status == -ETIME ||
619                      status == -EILSEQ)) {
620                 kaweth->stats.rx_errors++;
621                 dbg("Status was -EPROTO, -ETIME, or -EILSEQ.");
622                 return;
623         }
624         if (unlikely(status == -EOVERFLOW)) {
625                 kaweth->stats.rx_errors++;
626                 dbg("Status was -EOVERFLOW.");
627         }
628         spin_lock(&kaweth->device_lock);
629         if (IS_BLOCKED(kaweth->status)) {
630                 spin_unlock(&kaweth->device_lock);
631                 return;
632         }
633         spin_unlock(&kaweth->device_lock);
634
635         if(status && status != -EREMOTEIO && count != 1) {
636                 err("%s RX status: %d count: %d packet_len: %d",
637                            net->name,
638                            status,
639                            count,
640                            (int)pkt_len);
641                 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
642                 return;
643         }
644
645         if(kaweth->net && (count > 2)) {
646                 if(pkt_len > (count - 2)) {
647                         err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count);
648                         err("Packet len & 2047: %x", pkt_len & 2047);
649                         err("Count 2: %x", count2);
650                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
651                         return;
652                 }
653
654                 if(!(skb = dev_alloc_skb(pkt_len+2))) {
655                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
656                         return;
657                 }
658
659                 skb_reserve(skb, 2);    /* Align IP on 16 byte boundaries */
660
661                 skb_copy_to_linear_data(skb, kaweth->rx_buf + 2, pkt_len);
662
663                 skb_put(skb, pkt_len);
664
665                 skb->protocol = eth_type_trans(skb, net);
666
667                 netif_rx(skb);
668
669                 kaweth->stats.rx_packets++;
670                 kaweth->stats.rx_bytes += pkt_len;
671         }
672
673         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
674 }
675
676 /****************************************************************
677  *     kaweth_open
678  ****************************************************************/
679 static int kaweth_open(struct net_device *net)
680 {
681         struct kaweth_device *kaweth = netdev_priv(net);
682         int res;
683
684         dbg("Opening network device.");
685
686         res = usb_autopm_get_interface(kaweth->intf);
687         if (res) {
688                 err("Interface cannot be resumed.");
689                 return -EIO;
690         }
691         res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL);
692         if (res)
693                 goto err_out;
694
695         usb_fill_int_urb(
696                 kaweth->irq_urb,
697                 kaweth->dev,
698                 usb_rcvintpipe(kaweth->dev, 3),
699                 kaweth->intbuffer,
700                 INTBUFFERSIZE,
701                 int_callback,
702                 kaweth,
703                 250); /* overriding the descriptor */
704         kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle;
705         kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
706
707         res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL);
708         if (res) {
709                 usb_kill_urb(kaweth->rx_urb);
710                 goto err_out;
711         }
712         kaweth->opened = 1;
713
714         netif_start_queue(net);
715
716         kaweth_async_set_rx_mode(kaweth);
717         return 0;
718
719 err_out:
720         usb_autopm_put_interface(kaweth->intf);
721         return -EIO;
722 }
723
724 /****************************************************************
725  *     kaweth_kill_urbs
726  ****************************************************************/
727 static void kaweth_kill_urbs(struct kaweth_device *kaweth)
728 {
729         usb_kill_urb(kaweth->irq_urb);
730         usb_kill_urb(kaweth->rx_urb);
731         usb_kill_urb(kaweth->tx_urb);
732
733         cancel_delayed_work_sync(&kaweth->lowmem_work);
734
735         /* a scheduled work may have resubmitted,
736            we hit them again */
737         usb_kill_urb(kaweth->irq_urb);
738         usb_kill_urb(kaweth->rx_urb);
739 }
740
741 /****************************************************************
742  *     kaweth_close
743  ****************************************************************/
744 static int kaweth_close(struct net_device *net)
745 {
746         struct kaweth_device *kaweth = netdev_priv(net);
747
748         netif_stop_queue(net);
749         kaweth->opened = 0;
750
751         kaweth->status |= KAWETH_STATUS_CLOSING;
752
753         kaweth_kill_urbs(kaweth);
754
755         kaweth->status &= ~KAWETH_STATUS_CLOSING;
756
757         usb_autopm_put_interface(kaweth->intf);
758
759         return 0;
760 }
761
762 static void kaweth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
763 {
764         struct kaweth_device *kaweth = netdev_priv(dev);
765
766         strlcpy(info->driver, driver_name, sizeof(info->driver));
767         usb_make_path(kaweth->dev, info->bus_info, sizeof (info->bus_info));
768 }
769
770 static u32 kaweth_get_link(struct net_device *dev)
771 {
772         struct kaweth_device *kaweth = netdev_priv(dev);
773
774         return kaweth->linkstate;
775 }
776
777 static const struct ethtool_ops ops = {
778         .get_drvinfo    = kaweth_get_drvinfo,
779         .get_link       = kaweth_get_link
780 };
781
782 /****************************************************************
783  *     kaweth_usb_transmit_complete
784  ****************************************************************/
785 static void kaweth_usb_transmit_complete(struct urb *urb)
786 {
787         struct kaweth_device *kaweth = urb->context;
788         struct sk_buff *skb = kaweth->tx_skb;
789         int status = urb->status;
790
791         if (unlikely(status != 0))
792                 if (status != -ENOENT)
793                         dbg("%s: TX status %d.", kaweth->net->name, status);
794
795         netif_wake_queue(kaweth->net);
796         dev_kfree_skb_irq(skb);
797 }
798
799 /****************************************************************
800  *     kaweth_start_xmit
801  ****************************************************************/
802 static netdev_tx_t kaweth_start_xmit(struct sk_buff *skb,
803                                            struct net_device *net)
804 {
805         struct kaweth_device *kaweth = netdev_priv(net);
806         __le16 *private_header;
807
808         int res;
809
810         spin_lock_irq(&kaweth->device_lock);
811
812         kaweth_async_set_rx_mode(kaweth);
813         netif_stop_queue(net);
814         if (IS_BLOCKED(kaweth->status)) {
815                 goto skip;
816         }
817
818         /* We now decide whether we can put our special header into the sk_buff */
819         if (skb_cloned(skb) || skb_headroom(skb) < 2) {
820                 /* no such luck - we make our own */
821                 struct sk_buff *copied_skb;
822                 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC);
823                 dev_kfree_skb_irq(skb);
824                 skb = copied_skb;
825                 if (!copied_skb) {
826                         kaweth->stats.tx_errors++;
827                         netif_start_queue(net);
828                         spin_unlock_irq(&kaweth->device_lock);
829                         return NETDEV_TX_OK;
830                 }
831         }
832
833         private_header = (__le16 *)__skb_push(skb, 2);
834         *private_header = cpu_to_le16(skb->len-2);
835         kaweth->tx_skb = skb;
836
837         usb_fill_bulk_urb(kaweth->tx_urb,
838                       kaweth->dev,
839                       usb_sndbulkpipe(kaweth->dev, 2),
840                       private_header,
841                       skb->len,
842                       kaweth_usb_transmit_complete,
843                       kaweth);
844         kaweth->end = 0;
845
846         if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
847         {
848                 dev_warn(&net->dev, "kaweth failed tx_urb %d\n", res);
849 skip:
850                 kaweth->stats.tx_errors++;
851
852                 netif_start_queue(net);
853                 dev_kfree_skb_irq(skb);
854         }
855         else
856         {
857                 kaweth->stats.tx_packets++;
858                 kaweth->stats.tx_bytes += skb->len;
859                 net->trans_start = jiffies;
860         }
861
862         spin_unlock_irq(&kaweth->device_lock);
863
864         return NETDEV_TX_OK;
865 }
866
867 /****************************************************************
868  *     kaweth_set_rx_mode
869  ****************************************************************/
870 static void kaweth_set_rx_mode(struct net_device *net)
871 {
872         struct kaweth_device *kaweth = netdev_priv(net);
873
874         __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
875                                      KAWETH_PACKET_FILTER_BROADCAST |
876                                      KAWETH_PACKET_FILTER_MULTICAST;
877
878         dbg("Setting Rx mode to %d", packet_filter_bitmap);
879
880         netif_stop_queue(net);
881
882         if (net->flags & IFF_PROMISC) {
883                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
884         }
885         else if (!netdev_mc_empty(net) || (net->flags & IFF_ALLMULTI)) {
886                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
887         }
888
889         kaweth->packet_filter_bitmap = packet_filter_bitmap;
890         netif_wake_queue(net);
891 }
892
893 /****************************************************************
894  *     kaweth_async_set_rx_mode
895  ****************************************************************/
896 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
897 {
898         int result;
899         __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
900
901         kaweth->packet_filter_bitmap = 0;
902         if (packet_filter_bitmap == 0)
903                 return;
904
905         if (in_interrupt())
906                 return;
907
908         result = kaweth_control(kaweth,
909                                 usb_sndctrlpipe(kaweth->dev, 0),
910                                 KAWETH_COMMAND_SET_PACKET_FILTER,
911                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
912                                 packet_filter_bitmap,
913                                 0,
914                                 (void *)&kaweth->scratch,
915                                 0,
916                                 KAWETH_CONTROL_TIMEOUT);
917
918         if(result < 0) {
919                 err("Failed to set Rx mode: %d", result);
920         }
921         else {
922                 dbg("Set Rx mode to %d", packet_filter_bitmap);
923         }
924 }
925
926 /****************************************************************
927  *     kaweth_netdev_stats
928  ****************************************************************/
929 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev)
930 {
931         struct kaweth_device *kaweth = netdev_priv(dev);
932         return &kaweth->stats;
933 }
934
935 /****************************************************************
936  *     kaweth_tx_timeout
937  ****************************************************************/
938 static void kaweth_tx_timeout(struct net_device *net)
939 {
940         struct kaweth_device *kaweth = netdev_priv(net);
941
942         dev_warn(&net->dev, "%s: Tx timed out. Resetting.\n", net->name);
943         kaweth->stats.tx_errors++;
944         net->trans_start = jiffies;
945
946         usb_unlink_urb(kaweth->tx_urb);
947 }
948
949 /****************************************************************
950  *     kaweth_suspend
951  ****************************************************************/
952 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message)
953 {
954         struct kaweth_device *kaweth = usb_get_intfdata(intf);
955         unsigned long flags;
956
957         dbg("Suspending device");
958         spin_lock_irqsave(&kaweth->device_lock, flags);
959         kaweth->status |= KAWETH_STATUS_SUSPENDING;
960         spin_unlock_irqrestore(&kaweth->device_lock, flags);
961
962         kaweth_kill_urbs(kaweth);
963         return 0;
964 }
965
966 /****************************************************************
967  *     kaweth_resume
968  ****************************************************************/
969 static int kaweth_resume(struct usb_interface *intf)
970 {
971         struct kaweth_device *kaweth = usb_get_intfdata(intf);
972         unsigned long flags;
973
974         dbg("Resuming device");
975         spin_lock_irqsave(&kaweth->device_lock, flags);
976         kaweth->status &= ~KAWETH_STATUS_SUSPENDING;
977         spin_unlock_irqrestore(&kaweth->device_lock, flags);
978
979         if (!kaweth->opened)
980                 return 0;
981         kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
982         kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
983
984         return 0;
985 }
986
987 /****************************************************************
988  *     kaweth_probe
989  ****************************************************************/
990
991
992 static const struct net_device_ops kaweth_netdev_ops = {
993         .ndo_open =                     kaweth_open,
994         .ndo_stop =                     kaweth_close,
995         .ndo_start_xmit =               kaweth_start_xmit,
996         .ndo_tx_timeout =               kaweth_tx_timeout,
997         .ndo_set_multicast_list =       kaweth_set_rx_mode,
998         .ndo_get_stats =                kaweth_netdev_stats,
999         .ndo_change_mtu =               eth_change_mtu,
1000         .ndo_set_mac_address =          eth_mac_addr,
1001         .ndo_validate_addr =            eth_validate_addr,
1002 };
1003
1004 static int kaweth_probe(
1005                 struct usb_interface *intf,
1006                 const struct usb_device_id *id      /* from id_table */
1007         )
1008 {
1009         struct usb_device *dev = interface_to_usbdev(intf);
1010         struct kaweth_device *kaweth;
1011         struct net_device *netdev;
1012         const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
1013         int result = 0;
1014
1015         dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x",
1016                  dev->devnum,
1017                  le16_to_cpu(dev->descriptor.idVendor),
1018                  le16_to_cpu(dev->descriptor.idProduct),
1019                  le16_to_cpu(dev->descriptor.bcdDevice));
1020
1021         dbg("Device at %p", dev);
1022
1023         dbg("Descriptor length: %x type: %x",
1024                  (int)dev->descriptor.bLength,
1025                  (int)dev->descriptor.bDescriptorType);
1026
1027         netdev = alloc_etherdev(sizeof(*kaweth));
1028         if (!netdev)
1029                 return -ENOMEM;
1030
1031         kaweth = netdev_priv(netdev);
1032         kaweth->dev = dev;
1033         kaweth->net = netdev;
1034
1035         spin_lock_init(&kaweth->device_lock);
1036         init_waitqueue_head(&kaweth->term_wait);
1037
1038         dbg("Resetting.");
1039
1040         kaweth_reset(kaweth);
1041
1042         /*
1043          * If high byte of bcdDevice is nonzero, firmware is already
1044          * downloaded. Don't try to do it again, or we'll hang the device.
1045          */
1046
1047         if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) {
1048                 dev_info(&intf->dev, "Firmware present in device.\n");
1049         } else {
1050                 /* Download the firmware */
1051                 dev_info(&intf->dev, "Downloading firmware...\n");
1052                 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
1053                 if ((result = kaweth_download_firmware(kaweth,
1054                                                       "kaweth/new_code.bin",
1055                                                       100,
1056                                                       2)) < 0) {
1057                         err("Error downloading firmware (%d)", result);
1058                         goto err_fw;
1059                 }
1060
1061                 if ((result = kaweth_download_firmware(kaweth,
1062                                                       "kaweth/new_code_fix.bin",
1063                                                       100,
1064                                                       3)) < 0) {
1065                         err("Error downloading firmware fix (%d)", result);
1066                         goto err_fw;
1067                 }
1068
1069                 if ((result = kaweth_download_firmware(kaweth,
1070                                                       "kaweth/trigger_code.bin",
1071                                                       126,
1072                                                       2)) < 0) {
1073                         err("Error downloading trigger code (%d)", result);
1074                         goto err_fw;
1075
1076                 }
1077
1078                 if ((result = kaweth_download_firmware(kaweth,
1079                                                       "kaweth/trigger_code_fix.bin",
1080                                                       126,
1081                                                       3)) < 0) {
1082                         err("Error downloading trigger code fix (%d)", result);
1083                         goto err_fw;
1084                 }
1085
1086
1087                 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
1088                         err("Error triggering firmware (%d)", result);
1089                         goto err_fw;
1090                 }
1091
1092                 /* Device will now disappear for a moment...  */
1093                 dev_info(&intf->dev, "Firmware loaded.  I'll be back...\n");
1094 err_fw:
1095                 free_page((unsigned long)kaweth->firmware_buf);
1096                 free_netdev(netdev);
1097                 return -EIO;
1098         }
1099
1100         result = kaweth_read_configuration(kaweth);
1101
1102         if(result < 0) {
1103                 err("Error reading configuration (%d), no net device created", result);
1104                 goto err_free_netdev;
1105         }
1106
1107         dev_info(&intf->dev, "Statistics collection: %x\n", kaweth->configuration.statistics_mask);
1108         dev_info(&intf->dev, "Multicast filter limit: %x\n", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
1109         dev_info(&intf->dev, "MTU: %d\n", le16_to_cpu(kaweth->configuration.segment_size));
1110         dev_info(&intf->dev, "Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x\n",
1111                  (int)kaweth->configuration.hw_addr[0],
1112                  (int)kaweth->configuration.hw_addr[1],
1113                  (int)kaweth->configuration.hw_addr[2],
1114                  (int)kaweth->configuration.hw_addr[3],
1115                  (int)kaweth->configuration.hw_addr[4],
1116                  (int)kaweth->configuration.hw_addr[5]);
1117
1118         if(!memcmp(&kaweth->configuration.hw_addr,
1119                    &bcast_addr,
1120                    sizeof(bcast_addr))) {
1121                 err("Firmware not functioning properly, no net device created");
1122                 goto err_free_netdev;
1123         }
1124
1125         if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
1126                 dbg("Error setting URB size");
1127                 goto err_free_netdev;
1128         }
1129
1130         if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
1131                 err("Error setting SOFS wait");
1132                 goto err_free_netdev;
1133         }
1134
1135         result = kaweth_set_receive_filter(kaweth,
1136                                            KAWETH_PACKET_FILTER_DIRECTED |
1137                                            KAWETH_PACKET_FILTER_BROADCAST |
1138                                            KAWETH_PACKET_FILTER_MULTICAST);
1139
1140         if(result < 0) {
1141                 err("Error setting receive filter");
1142                 goto err_free_netdev;
1143         }
1144
1145         dbg("Initializing net device.");
1146
1147         kaweth->intf = intf;
1148
1149         kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1150         if (!kaweth->tx_urb)
1151                 goto err_free_netdev;
1152         kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1153         if (!kaweth->rx_urb)
1154                 goto err_only_tx;
1155         kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1156         if (!kaweth->irq_urb)
1157                 goto err_tx_and_rx;
1158
1159         kaweth->intbuffer = usb_alloc_coherent( kaweth->dev,
1160                                                 INTBUFFERSIZE,
1161                                                 GFP_KERNEL,
1162                                                 &kaweth->intbufferhandle);
1163         if (!kaweth->intbuffer)
1164                 goto err_tx_and_rx_and_irq;
1165         kaweth->rx_buf = usb_alloc_coherent(    kaweth->dev,
1166                                                 KAWETH_BUF_SIZE,
1167                                                 GFP_KERNEL,
1168                                                 &kaweth->rxbufferhandle);
1169         if (!kaweth->rx_buf)
1170                 goto err_all_but_rxbuf;
1171
1172         memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr));
1173         memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr,
1174                sizeof(kaweth->configuration.hw_addr));
1175
1176         netdev->netdev_ops = &kaweth_netdev_ops;
1177         netdev->watchdog_timeo = KAWETH_TX_TIMEOUT;
1178         netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size);
1179         SET_ETHTOOL_OPS(netdev, &ops);
1180
1181         /* kaweth is zeroed as part of alloc_netdev */
1182         INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl);
1183         usb_set_intfdata(intf, kaweth);
1184
1185 #if 0
1186 // dma_supported() is deeply broken on almost all architectures
1187         if (dma_supported (&intf->dev, 0xffffffffffffffffULL))
1188                 kaweth->net->features |= NETIF_F_HIGHDMA;
1189 #endif
1190
1191         SET_NETDEV_DEV(netdev, &intf->dev);
1192         if (register_netdev(netdev) != 0) {
1193                 err("Error registering netdev.");
1194                 goto err_intfdata;
1195         }
1196
1197         dev_info(&intf->dev, "kaweth interface created at %s\n",
1198                  kaweth->net->name);
1199
1200         dbg("Kaweth probe returning.");
1201
1202         return 0;
1203
1204 err_intfdata:
1205         usb_set_intfdata(intf, NULL);
1206         usb_free_coherent(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1207 err_all_but_rxbuf:
1208         usb_free_coherent(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1209 err_tx_and_rx_and_irq:
1210         usb_free_urb(kaweth->irq_urb);
1211 err_tx_and_rx:
1212         usb_free_urb(kaweth->rx_urb);
1213 err_only_tx:
1214         usb_free_urb(kaweth->tx_urb);
1215 err_free_netdev:
1216         free_netdev(netdev);
1217
1218         return -EIO;
1219 }
1220
1221 /****************************************************************
1222  *     kaweth_disconnect
1223  ****************************************************************/
1224 static void kaweth_disconnect(struct usb_interface *intf)
1225 {
1226         struct kaweth_device *kaweth = usb_get_intfdata(intf);
1227         struct net_device *netdev;
1228
1229         dev_info(&intf->dev, "Unregistering\n");
1230
1231         usb_set_intfdata(intf, NULL);
1232         if (!kaweth) {
1233                 dev_warn(&intf->dev, "unregistering non-existant device\n");
1234                 return;
1235         }
1236         netdev = kaweth->net;
1237
1238         dbg("Unregistering net device");
1239         unregister_netdev(netdev);
1240
1241         usb_free_urb(kaweth->rx_urb);
1242         usb_free_urb(kaweth->tx_urb);
1243         usb_free_urb(kaweth->irq_urb);
1244
1245         usb_free_coherent(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1246         usb_free_coherent(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1247
1248         free_netdev(netdev);
1249 }
1250
1251
1252 // FIXME this completion stuff is a modified clone of
1253 // an OLD version of some stuff in usb.c ...
1254 struct usb_api_data {
1255         wait_queue_head_t wqh;
1256         int done;
1257 };
1258
1259 /*-------------------------------------------------------------------*
1260  * completion handler for compatibility wrappers (sync control/bulk) *
1261  *-------------------------------------------------------------------*/
1262 static void usb_api_blocking_completion(struct urb *urb)
1263 {
1264         struct usb_api_data *awd = (struct usb_api_data *)urb->context;
1265
1266         awd->done=1;
1267         wake_up(&awd->wqh);
1268 }
1269
1270 /*-------------------------------------------------------------------*
1271  *                         COMPATIBILITY STUFF                       *
1272  *-------------------------------------------------------------------*/
1273
1274 // Starts urb and waits for completion or timeout
1275 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
1276 {
1277         struct usb_api_data awd;
1278         int status;
1279
1280         init_waitqueue_head(&awd.wqh);
1281         awd.done = 0;
1282
1283         urb->context = &awd;
1284         status = usb_submit_urb(urb, GFP_NOIO);
1285         if (status) {
1286                 // something went wrong
1287                 usb_free_urb(urb);
1288                 return status;
1289         }
1290
1291         if (!wait_event_timeout(awd.wqh, awd.done, timeout)) {
1292                 // timeout
1293                 dev_warn(&urb->dev->dev, "usb_control/bulk_msg: timeout\n");
1294                 usb_kill_urb(urb);  // remove urb safely
1295                 status = -ETIMEDOUT;
1296         }
1297         else {
1298                 status = urb->status;
1299         }
1300
1301         if (actual_length) {
1302                 *actual_length = urb->actual_length;
1303         }
1304
1305         usb_free_urb(urb);
1306         return status;
1307 }
1308
1309 /*-------------------------------------------------------------------*/
1310 // returns status (negative) or length (positive)
1311 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
1312                                        unsigned int pipe,
1313                                        struct usb_ctrlrequest *cmd, void *data,
1314                                        int len, int timeout)
1315 {
1316         struct urb *urb;
1317         int retv;
1318         int length = 0; /* shut up GCC */
1319
1320         urb = usb_alloc_urb(0, GFP_NOIO);
1321         if (!urb)
1322                 return -ENOMEM;
1323
1324         usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data,
1325                          len, usb_api_blocking_completion, NULL);
1326
1327         retv = usb_start_wait_urb(urb, timeout, &length);
1328         if (retv < 0) {
1329                 return retv;
1330         }
1331         else {
1332                 return length;
1333         }
1334 }
1335
1336
1337 /****************************************************************
1338  *     kaweth_init
1339  ****************************************************************/
1340 static int __init kaweth_init(void)
1341 {
1342         dbg("Driver loading");
1343         return usb_register(&kaweth_driver);
1344 }
1345
1346 /****************************************************************
1347  *     kaweth_exit
1348  ****************************************************************/
1349 static void __exit kaweth_exit(void)
1350 {
1351         usb_deregister(&kaweth_driver);
1352 }
1353
1354 module_init(kaweth_init);
1355 module_exit(kaweth_exit);
1356
1357
1358
1359
1360
1361
1362
1363
1364