Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6] / 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  * Fix in_interrupt() problem
35  * Develop test procedures for USB net interfaces
36  * Run test procedures
37  * Fix bugs from previous two steps
38  * Snoop other OSs for any tricks we're not doing
39  * SMP locking
40  * Reduce arbitrary timeouts
41  * Smart multicast support
42  * Temporary MAC change support
43  * Tunable SOFs parameter - ioctl()?
44  * Ethernet stats collection
45  * Code formatting improvements
46  */
47
48 #include <linux/module.h>
49 #include <linux/slab.h>
50 #include <linux/string.h>
51 #include <linux/init.h>
52 #include <linux/delay.h>
53 #include <linux/netdevice.h>
54 #include <linux/etherdevice.h>
55 #include <linux/usb.h>
56 #include <linux/types.h>
57 #include <linux/ethtool.h>
58 #include <linux/dma-mapping.h>
59 #include <linux/wait.h>
60 #include <linux/firmware.h>
61 #include <asm/uaccess.h>
62 #include <asm/byteorder.h>
63
64 #undef DEBUG
65
66 #define KAWETH_MTU                      1514
67 #define KAWETH_BUF_SIZE                 1664
68 #define KAWETH_TX_TIMEOUT               (5 * HZ)
69 #define KAWETH_SCRATCH_SIZE             32
70 #define KAWETH_FIRMWARE_BUF_SIZE        4096
71 #define KAWETH_CONTROL_TIMEOUT          (30000)
72
73 #define KAWETH_STATUS_BROKEN            0x0000001
74 #define KAWETH_STATUS_CLOSING           0x0000002
75 #define KAWETH_STATUS_SUSPENDING        0x0000004
76
77 #define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING)
78
79 #define KAWETH_PACKET_FILTER_PROMISCUOUS        0x01
80 #define KAWETH_PACKET_FILTER_ALL_MULTICAST      0x02
81 #define KAWETH_PACKET_FILTER_DIRECTED           0x04
82 #define KAWETH_PACKET_FILTER_BROADCAST          0x08
83 #define KAWETH_PACKET_FILTER_MULTICAST          0x10
84
85 /* Table 7 */
86 #define KAWETH_COMMAND_GET_ETHERNET_DESC        0x00
87 #define KAWETH_COMMAND_MULTICAST_FILTERS        0x01
88 #define KAWETH_COMMAND_SET_PACKET_FILTER        0x02
89 #define KAWETH_COMMAND_STATISTICS               0x03
90 #define KAWETH_COMMAND_SET_TEMP_MAC             0x06
91 #define KAWETH_COMMAND_GET_TEMP_MAC             0x07
92 #define KAWETH_COMMAND_SET_URB_SIZE             0x08
93 #define KAWETH_COMMAND_SET_SOFS_WAIT            0x09
94 #define KAWETH_COMMAND_SCAN                     0xFF
95
96 #define KAWETH_SOFS_TO_WAIT                     0x05
97
98 #define INTBUFFERSIZE                           4
99
100 #define STATE_OFFSET                            0
101 #define STATE_MASK                              0x40
102 #define STATE_SHIFT                             5
103
104 #define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED)
105
106
107 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>");
108 MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver");
109 MODULE_LICENSE("GPL");
110 MODULE_FIRMWARE("kaweth/new_code.bin");
111 MODULE_FIRMWARE("kaweth/new_code_fix.bin");
112 MODULE_FIRMWARE("kaweth/trigger_code.bin");
113 MODULE_FIRMWARE("kaweth/trigger_code_fix.bin");
114
115 static const char driver_name[] = "kaweth";
116
117 static int kaweth_probe(
118                 struct usb_interface *intf,
119                 const struct usb_device_id *id  /* from id_table */
120         );
121 static void kaweth_disconnect(struct usb_interface *intf);
122 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
123                                        unsigned int pipe,
124                                        struct usb_ctrlrequest *cmd, void *data,
125                                        int len, int timeout);
126 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message);
127 static int kaweth_resume(struct usb_interface *intf);
128
129 /****************************************************************
130  *     usb_device_id
131  ****************************************************************/
132 static struct usb_device_id usb_klsi_table[] = {
133         { USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */
134         { USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */
135         { USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */
136         { USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */
137         { USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */
138         { USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */
139         { USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */
140         { USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */
141         { USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */
142         { USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */
143         { USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */
144         { USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */
145         { USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */
146         { USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */
147         { USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */
148         { USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */
149         { USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */
150         { USB_DEVICE(0x0846, 0x1001) }, /* NetGear EA-101 */
151         { USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */
152         { USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */
153         { USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */
154         { USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */
155         { USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */
156         { USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */
157         { USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */
158         { USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */
159         { USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */
160         { USB_DEVICE(0x1485, 0x0001) }, /* Silicom U2E */
161         { USB_DEVICE(0x1485, 0x0002) }, /* Psion Dacom Gold Port Ethernet */
162         { USB_DEVICE(0x1645, 0x0005) }, /* Entrega E45 */
163         { USB_DEVICE(0x1645, 0x0008) }, /* Entrega USB Ethernet Adapter */
164         { USB_DEVICE(0x1645, 0x8005) }, /* PortGear Ethernet Adapter */
165         { USB_DEVICE(0x1668, 0x0323) }, /* Actiontec USB Ethernet */
166         { USB_DEVICE(0x2001, 0x4000) }, /* D-link DSB-650C */
167         {} /* Null terminator */
168 };
169
170 MODULE_DEVICE_TABLE (usb, usb_klsi_table);
171
172 /****************************************************************
173  *     kaweth_driver
174  ****************************************************************/
175 static struct usb_driver kaweth_driver = {
176         .name =         driver_name,
177         .probe =        kaweth_probe,
178         .disconnect =   kaweth_disconnect,
179         .suspend =      kaweth_suspend,
180         .resume =       kaweth_resume,
181         .id_table =     usb_klsi_table,
182         .supports_autosuspend = 1,
183 };
184
185 typedef __u8 eth_addr_t[6];
186
187 /****************************************************************
188  *     usb_eth_dev
189  ****************************************************************/
190 struct usb_eth_dev {
191         char *name;
192         __u16 vendor;
193         __u16 device;
194         void *pdata;
195 };
196
197 /****************************************************************
198  *     kaweth_ethernet_configuration
199  *     Refer Table 8
200  ****************************************************************/
201 struct kaweth_ethernet_configuration
202 {
203         __u8 size;
204         __u8 reserved1;
205         __u8 reserved2;
206         eth_addr_t hw_addr;
207         __u32 statistics_mask;
208         __le16 segment_size;
209         __u16 max_multicast_filters;
210         __u8 reserved3;
211 } __attribute__ ((packed));
212
213 /****************************************************************
214  *     kaweth_device
215  ****************************************************************/
216 struct kaweth_device
217 {
218         spinlock_t device_lock;
219
220         __u32 status;
221         int end;
222         int suspend_lowmem_rx;
223         int suspend_lowmem_ctrl;
224         int linkstate;
225         int opened;
226         struct delayed_work lowmem_work;
227
228         struct usb_device *dev;
229         struct usb_interface *intf;
230         struct net_device *net;
231         wait_queue_head_t term_wait;
232
233         struct urb *rx_urb;
234         struct urb *tx_urb;
235         struct urb *irq_urb;
236
237         dma_addr_t intbufferhandle;
238         __u8 *intbuffer;
239         dma_addr_t rxbufferhandle;
240         __u8 *rx_buf;
241
242         
243         struct sk_buff *tx_skb;
244
245         __u8 *firmware_buf;
246         __u8 scratch[KAWETH_SCRATCH_SIZE];
247         __u16 packet_filter_bitmap;
248
249         struct kaweth_ethernet_configuration configuration;
250
251         struct net_device_stats stats;
252 };
253
254
255 /****************************************************************
256  *     kaweth_control
257  ****************************************************************/
258 static int kaweth_control(struct kaweth_device *kaweth,
259                           unsigned int pipe,
260                           __u8 request,
261                           __u8 requesttype,
262                           __u16 value,
263                           __u16 index,
264                           void *data,
265                           __u16 size,
266                           int timeout)
267 {
268         struct usb_ctrlrequest *dr;
269
270         dbg("kaweth_control()");
271
272         if(in_interrupt()) {
273                 dbg("in_interrupt()");
274                 return -EBUSY;
275         }
276
277         dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
278
279         if (!dr) {
280                 dbg("kmalloc() failed");
281                 return -ENOMEM;
282         }
283
284         dr->bRequestType= requesttype;
285         dr->bRequest = request;
286         dr->wValue = cpu_to_le16p(&value);
287         dr->wIndex = cpu_to_le16p(&index);
288         dr->wLength = cpu_to_le16p(&size);
289
290         return kaweth_internal_control_msg(kaweth->dev,
291                                         pipe,
292                                         dr,
293                                         data,
294                                         size,
295                                         timeout);
296 }
297
298 /****************************************************************
299  *     kaweth_read_configuration
300  ****************************************************************/
301 static int kaweth_read_configuration(struct kaweth_device *kaweth)
302 {
303         int retval;
304
305         dbg("Reading kaweth configuration");
306
307         retval = kaweth_control(kaweth,
308                                 usb_rcvctrlpipe(kaweth->dev, 0),
309                                 KAWETH_COMMAND_GET_ETHERNET_DESC,
310                                 USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE,
311                                 0,
312                                 0,
313                                 (void *)&kaweth->configuration,
314                                 sizeof(kaweth->configuration),
315                                 KAWETH_CONTROL_TIMEOUT);
316
317         return retval;
318 }
319
320 /****************************************************************
321  *     kaweth_set_urb_size
322  ****************************************************************/
323 static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size)
324 {
325         int retval;
326
327         dbg("Setting URB size to %d", (unsigned)urb_size);
328
329         retval = kaweth_control(kaweth,
330                                 usb_sndctrlpipe(kaweth->dev, 0),
331                                 KAWETH_COMMAND_SET_URB_SIZE,
332                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
333                                 urb_size,
334                                 0,
335                                 (void *)&kaweth->scratch,
336                                 0,
337                                 KAWETH_CONTROL_TIMEOUT);
338
339         return retval;
340 }
341
342 /****************************************************************
343  *     kaweth_set_sofs_wait
344  ****************************************************************/
345 static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait)
346 {
347         int retval;
348
349         dbg("Set SOFS wait to %d", (unsigned)sofs_wait);
350
351         retval = kaweth_control(kaweth,
352                                 usb_sndctrlpipe(kaweth->dev, 0),
353                                 KAWETH_COMMAND_SET_SOFS_WAIT,
354                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
355                                 sofs_wait,
356                                 0,
357                                 (void *)&kaweth->scratch,
358                                 0,
359                                 KAWETH_CONTROL_TIMEOUT);
360
361         return retval;
362 }
363
364 /****************************************************************
365  *     kaweth_set_receive_filter
366  ****************************************************************/
367 static int kaweth_set_receive_filter(struct kaweth_device *kaweth,
368                                      __u16 receive_filter)
369 {
370         int retval;
371
372         dbg("Set receive filter to %d", (unsigned)receive_filter);
373
374         retval = kaweth_control(kaweth,
375                                 usb_sndctrlpipe(kaweth->dev, 0),
376                                 KAWETH_COMMAND_SET_PACKET_FILTER,
377                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
378                                 receive_filter,
379                                 0,
380                                 (void *)&kaweth->scratch,
381                                 0,
382                                 KAWETH_CONTROL_TIMEOUT);
383
384         return retval;
385 }
386
387 /****************************************************************
388  *     kaweth_download_firmware
389  ****************************************************************/
390 static int kaweth_download_firmware(struct kaweth_device *kaweth,
391                                     const char *fwname,
392                                     __u8 interrupt,
393                                     __u8 type)
394 {
395         const struct firmware *fw;
396         int data_len;
397         int ret;
398
399         ret = request_firmware(&fw, fwname, &kaweth->dev->dev);
400         if (ret) {
401                 err("Firmware request failed\n");
402                 return ret;
403         }
404
405         if (fw->size > KAWETH_FIRMWARE_BUF_SIZE) {
406                 err("Firmware too big: %zu", fw->size);
407                 return -ENOSPC;
408         }
409         data_len = fw->size;
410         memcpy(kaweth->firmware_buf, fw->data, fw->size);
411
412         release_firmware(fw);
413
414         kaweth->firmware_buf[2] = (data_len & 0xFF) - 7;
415         kaweth->firmware_buf[3] = data_len >> 8;
416         kaweth->firmware_buf[4] = type;
417         kaweth->firmware_buf[5] = interrupt;
418
419         dbg("High: %i, Low:%i", kaweth->firmware_buf[3],
420                    kaweth->firmware_buf[2]);
421
422         dbg("Downloading firmware at %p to kaweth device at %p",
423             fw->data, kaweth);
424         dbg("Firmware length: %d", data_len);
425
426         return kaweth_control(kaweth,
427                               usb_sndctrlpipe(kaweth->dev, 0),
428                               KAWETH_COMMAND_SCAN,
429                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
430                               0,
431                               0,
432                               (void *)kaweth->firmware_buf,
433                               data_len,
434                               KAWETH_CONTROL_TIMEOUT);
435 }
436
437 /****************************************************************
438  *     kaweth_trigger_firmware
439  ****************************************************************/
440 static int kaweth_trigger_firmware(struct kaweth_device *kaweth,
441                                    __u8 interrupt)
442 {
443         kaweth->firmware_buf[0] = 0xB6;
444         kaweth->firmware_buf[1] = 0xC3;
445         kaweth->firmware_buf[2] = 0x01;
446         kaweth->firmware_buf[3] = 0x00;
447         kaweth->firmware_buf[4] = 0x06;
448         kaweth->firmware_buf[5] = interrupt;
449         kaweth->firmware_buf[6] = 0x00;
450         kaweth->firmware_buf[7] = 0x00;
451
452         dbg("Triggering firmware");
453
454         return kaweth_control(kaweth,
455                               usb_sndctrlpipe(kaweth->dev, 0),
456                               KAWETH_COMMAND_SCAN,
457                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
458                               0,
459                               0,
460                               (void *)kaweth->firmware_buf,
461                               8,
462                               KAWETH_CONTROL_TIMEOUT);
463 }
464
465 /****************************************************************
466  *     kaweth_reset
467  ****************************************************************/
468 static int kaweth_reset(struct kaweth_device *kaweth)
469 {
470         int result;
471
472         dbg("kaweth_reset(%p)", kaweth);
473         result = kaweth_control(kaweth,
474                                 usb_sndctrlpipe(kaweth->dev, 0),
475                                 USB_REQ_SET_CONFIGURATION,
476                                 0,
477                                 kaweth->dev->config[0].desc.bConfigurationValue,
478                                 0,
479                                 NULL,
480                                 0,
481                                 KAWETH_CONTROL_TIMEOUT);
482
483         mdelay(10);
484
485         dbg("kaweth_reset() returns %d.",result);
486
487         return result;
488 }
489
490 static void kaweth_usb_receive(struct urb *);
491 static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t);
492
493 /****************************************************************
494         int_callback
495 *****************************************************************/
496
497 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf)
498 {
499         int status;
500
501         status = usb_submit_urb (kaweth->irq_urb, mf);
502         if (unlikely(status == -ENOMEM)) {
503                 kaweth->suspend_lowmem_ctrl = 1;
504                 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
505         } else {
506                 kaweth->suspend_lowmem_ctrl = 0;
507         }
508
509         if (status)
510                 err ("can't resubmit intr, %s-%s, status %d",
511                                 kaweth->dev->bus->bus_name,
512                                 kaweth->dev->devpath, status);
513 }
514
515 static void int_callback(struct urb *u)
516 {
517         struct kaweth_device *kaweth = u->context;
518         int act_state;
519
520         switch (u->status) {
521         case 0:                 /* success */
522                 break;
523         case -ECONNRESET:       /* unlink */
524         case -ENOENT:
525         case -ESHUTDOWN:
526                 return;
527         /* -EPIPE:  should clear the halt */
528         default:                /* error */
529                 goto resubmit;
530         }
531
532         /* we check the link state to report changes */
533         if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) {
534                 if (act_state)
535                         netif_carrier_on(kaweth->net);
536                 else
537                         netif_carrier_off(kaweth->net);
538
539                 kaweth->linkstate = act_state;
540         }
541 resubmit:
542         kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC);
543 }
544
545 static void kaweth_resubmit_tl(struct work_struct *work)
546 {
547         struct kaweth_device *kaweth =
548                 container_of(work, struct kaweth_device, lowmem_work.work);
549
550         if (IS_BLOCKED(kaweth->status))
551                 return;
552
553         if (kaweth->suspend_lowmem_rx)
554                 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
555
556         if (kaweth->suspend_lowmem_ctrl)
557                 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
558 }
559
560
561 /****************************************************************
562  *     kaweth_resubmit_rx_urb
563  ****************************************************************/
564 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth,
565                                                 gfp_t mem_flags)
566 {
567         int result;
568
569         usb_fill_bulk_urb(kaweth->rx_urb,
570                       kaweth->dev,
571                       usb_rcvbulkpipe(kaweth->dev, 1),
572                       kaweth->rx_buf,
573                       KAWETH_BUF_SIZE,
574                       kaweth_usb_receive,
575                       kaweth);
576         kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
577         kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle;
578
579         if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) {
580                 if (result == -ENOMEM) {
581                         kaweth->suspend_lowmem_rx = 1;
582                         schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
583                 }
584                 err("resubmitting rx_urb %d failed", result);
585         } else {
586                 kaweth->suspend_lowmem_rx = 0;
587         }
588
589         return result;
590 }
591
592 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth);
593
594 /****************************************************************
595  *     kaweth_usb_receive
596  ****************************************************************/
597 static void kaweth_usb_receive(struct urb *urb)
598 {
599         struct kaweth_device *kaweth = urb->context;
600         struct net_device *net = kaweth->net;
601
602         int count = urb->actual_length;
603         int count2 = urb->transfer_buffer_length;
604
605         __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf);
606
607         struct sk_buff *skb;
608
609         if(unlikely(urb->status == -ECONNRESET || urb->status == -ESHUTDOWN))
610         /* we are killed - set a flag and wake the disconnect handler */
611         {
612                 kaweth->end = 1;
613                 wake_up(&kaweth->term_wait);
614                 return;
615         }
616
617         spin_lock(&kaweth->device_lock);
618         if (IS_BLOCKED(kaweth->status)) {
619                 spin_unlock(&kaweth->device_lock);
620                 return;
621         }
622         spin_unlock(&kaweth->device_lock);
623
624         if(urb->status && urb->status != -EREMOTEIO && count != 1) {
625                 err("%s RX status: %d count: %d packet_len: %d",
626                            net->name,
627                            urb->status,
628                            count,
629                            (int)pkt_len);
630                 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
631                 return;
632         }
633
634         if(kaweth->net && (count > 2)) {
635                 if(pkt_len > (count - 2)) {
636                         err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count);
637                         err("Packet len & 2047: %x", pkt_len & 2047);
638                         err("Count 2: %x", count2);
639                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
640                         return;
641                 }
642
643                 if(!(skb = dev_alloc_skb(pkt_len+2))) {
644                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
645                         return;
646                 }
647
648                 skb_reserve(skb, 2);    /* Align IP on 16 byte boundaries */
649
650                 skb_copy_to_linear_data(skb, kaweth->rx_buf + 2, pkt_len);
651
652                 skb_put(skb, pkt_len);
653
654                 skb->protocol = eth_type_trans(skb, net);
655
656                 netif_rx(skb);
657
658                 kaweth->stats.rx_packets++;
659                 kaweth->stats.rx_bytes += pkt_len;
660         }
661
662         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
663 }
664
665 /****************************************************************
666  *     kaweth_open
667  ****************************************************************/
668 static int kaweth_open(struct net_device *net)
669 {
670         struct kaweth_device *kaweth = netdev_priv(net);
671         int res;
672
673         dbg("Opening network device.");
674
675         res = usb_autopm_get_interface(kaweth->intf);
676         if (res) {
677                 err("Interface cannot be resumed.");
678                 return -EIO;
679         }
680         res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL);
681         if (res)
682                 goto err_out;
683
684         usb_fill_int_urb(
685                 kaweth->irq_urb,
686                 kaweth->dev,
687                 usb_rcvintpipe(kaweth->dev, 3),
688                 kaweth->intbuffer,
689                 INTBUFFERSIZE,
690                 int_callback,
691                 kaweth,
692                 250); /* overriding the descriptor */
693         kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle;
694         kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
695
696         res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL);
697         if (res) {
698                 usb_kill_urb(kaweth->rx_urb);
699                 goto err_out;
700         }
701         kaweth->opened = 1;
702
703         netif_start_queue(net);
704
705         kaweth_async_set_rx_mode(kaweth);
706         return 0;
707
708 err_out:
709         usb_autopm_enable(kaweth->intf);
710         return -EIO;
711 }
712
713 /****************************************************************
714  *     kaweth_kill_urbs
715  ****************************************************************/
716 static void kaweth_kill_urbs(struct kaweth_device *kaweth)
717 {
718         usb_kill_urb(kaweth->irq_urb);
719         usb_kill_urb(kaweth->rx_urb);
720         usb_kill_urb(kaweth->tx_urb);
721
722         cancel_delayed_work_sync(&kaweth->lowmem_work);
723
724         /* a scheduled work may have resubmitted,
725            we hit them again */
726         usb_kill_urb(kaweth->irq_urb);
727         usb_kill_urb(kaweth->rx_urb);
728 }
729
730 /****************************************************************
731  *     kaweth_close
732  ****************************************************************/
733 static int kaweth_close(struct net_device *net)
734 {
735         struct kaweth_device *kaweth = netdev_priv(net);
736
737         netif_stop_queue(net);
738         kaweth->opened = 0;
739
740         kaweth->status |= KAWETH_STATUS_CLOSING;
741
742         kaweth_kill_urbs(kaweth);
743
744         kaweth->status &= ~KAWETH_STATUS_CLOSING;
745
746         usb_autopm_enable(kaweth->intf);
747
748         return 0;
749 }
750
751 static void kaweth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
752 {
753         struct kaweth_device *kaweth = netdev_priv(dev);
754
755         strlcpy(info->driver, driver_name, sizeof(info->driver));
756         usb_make_path(kaweth->dev, info->bus_info, sizeof (info->bus_info));
757 }
758
759 static u32 kaweth_get_link(struct net_device *dev)
760 {
761         struct kaweth_device *kaweth = netdev_priv(dev);
762
763         return kaweth->linkstate;
764 }
765
766 static struct ethtool_ops ops = {
767         .get_drvinfo    = kaweth_get_drvinfo,
768         .get_link       = kaweth_get_link
769 };
770
771 /****************************************************************
772  *     kaweth_usb_transmit_complete
773  ****************************************************************/
774 static void kaweth_usb_transmit_complete(struct urb *urb)
775 {
776         struct kaweth_device *kaweth = urb->context;
777         struct sk_buff *skb = kaweth->tx_skb;
778
779         if (unlikely(urb->status != 0))
780                 if (urb->status != -ENOENT)
781                         dbg("%s: TX status %d.", kaweth->net->name, urb->status);
782
783         netif_wake_queue(kaweth->net);
784         dev_kfree_skb_irq(skb);
785 }
786
787 /****************************************************************
788  *     kaweth_start_xmit
789  ****************************************************************/
790 static int kaweth_start_xmit(struct sk_buff *skb, struct net_device *net)
791 {
792         struct kaweth_device *kaweth = netdev_priv(net);
793         __le16 *private_header;
794
795         int res;
796
797         spin_lock(&kaweth->device_lock);
798
799         kaweth_async_set_rx_mode(kaweth);
800         netif_stop_queue(net);
801         if (IS_BLOCKED(kaweth->status)) {
802                 goto skip;
803         }
804
805         /* We now decide whether we can put our special header into the sk_buff */
806         if (skb_cloned(skb) || skb_headroom(skb) < 2) {
807                 /* no such luck - we make our own */
808                 struct sk_buff *copied_skb;
809                 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC);
810                 dev_kfree_skb_irq(skb);
811                 skb = copied_skb;
812                 if (!copied_skb) {
813                         kaweth->stats.tx_errors++;
814                         netif_start_queue(net);
815                         spin_unlock(&kaweth->device_lock);
816                         return 0;
817                 }
818         }
819
820         private_header = (__le16 *)__skb_push(skb, 2);
821         *private_header = cpu_to_le16(skb->len-2);
822         kaweth->tx_skb = skb;
823
824         usb_fill_bulk_urb(kaweth->tx_urb,
825                       kaweth->dev,
826                       usb_sndbulkpipe(kaweth->dev, 2),
827                       private_header,
828                       skb->len,
829                       kaweth_usb_transmit_complete,
830                       kaweth);
831         kaweth->end = 0;
832
833         if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
834         {
835                 dev_warn(&net->dev, "kaweth failed tx_urb %d\n", res);
836 skip:
837                 kaweth->stats.tx_errors++;
838
839                 netif_start_queue(net);
840                 dev_kfree_skb_irq(skb);
841         }
842         else
843         {
844                 kaweth->stats.tx_packets++;
845                 kaweth->stats.tx_bytes += skb->len;
846                 net->trans_start = jiffies;
847         }
848
849         spin_unlock(&kaweth->device_lock);
850
851         return 0;
852 }
853
854 /****************************************************************
855  *     kaweth_set_rx_mode
856  ****************************************************************/
857 static void kaweth_set_rx_mode(struct net_device *net)
858 {
859         struct kaweth_device *kaweth = netdev_priv(net);
860
861         __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
862                                      KAWETH_PACKET_FILTER_BROADCAST |
863                                      KAWETH_PACKET_FILTER_MULTICAST;
864
865         dbg("Setting Rx mode to %d", packet_filter_bitmap);
866
867         netif_stop_queue(net);
868
869         if (net->flags & IFF_PROMISC) {
870                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
871         }
872         else if ((net->mc_count) || (net->flags & IFF_ALLMULTI)) {
873                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
874         }
875
876         kaweth->packet_filter_bitmap = packet_filter_bitmap;
877         netif_wake_queue(net);
878 }
879
880 /****************************************************************
881  *     kaweth_async_set_rx_mode
882  ****************************************************************/
883 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
884 {
885         __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
886         kaweth->packet_filter_bitmap = 0;
887         if (packet_filter_bitmap == 0)
888                 return;
889
890         {
891         int result;
892         result = kaweth_control(kaweth,
893                                 usb_sndctrlpipe(kaweth->dev, 0),
894                                 KAWETH_COMMAND_SET_PACKET_FILTER,
895                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
896                                 packet_filter_bitmap,
897                                 0,
898                                 (void *)&kaweth->scratch,
899                                 0,
900                                 KAWETH_CONTROL_TIMEOUT);
901
902         if(result < 0) {
903                 err("Failed to set Rx mode: %d", result);
904         }
905         else {
906                 dbg("Set Rx mode to %d", packet_filter_bitmap);
907         }
908         }
909 }
910
911 /****************************************************************
912  *     kaweth_netdev_stats
913  ****************************************************************/
914 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev)
915 {
916         struct kaweth_device *kaweth = netdev_priv(dev);
917         return &kaweth->stats;
918 }
919
920 /****************************************************************
921  *     kaweth_tx_timeout
922  ****************************************************************/
923 static void kaweth_tx_timeout(struct net_device *net)
924 {
925         struct kaweth_device *kaweth = netdev_priv(net);
926
927         dev_warn(&net->dev, "%s: Tx timed out. Resetting.\n", net->name);
928         kaweth->stats.tx_errors++;
929         net->trans_start = jiffies;
930
931         usb_unlink_urb(kaweth->tx_urb);
932 }
933
934 /****************************************************************
935  *     kaweth_suspend
936  ****************************************************************/
937 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message)
938 {
939         struct kaweth_device *kaweth = usb_get_intfdata(intf);
940         unsigned long flags;
941
942         dbg("Suspending device");
943         spin_lock_irqsave(&kaweth->device_lock, flags);
944         kaweth->status |= KAWETH_STATUS_SUSPENDING;
945         spin_unlock_irqrestore(&kaweth->device_lock, flags);
946
947         kaweth_kill_urbs(kaweth);
948         return 0;
949 }
950
951 /****************************************************************
952  *     kaweth_resume
953  ****************************************************************/
954 static int kaweth_resume(struct usb_interface *intf)
955 {
956         struct kaweth_device *kaweth = usb_get_intfdata(intf);
957         unsigned long flags;
958
959         dbg("Resuming device");
960         spin_lock_irqsave(&kaweth->device_lock, flags);
961         kaweth->status &= ~KAWETH_STATUS_SUSPENDING;
962         spin_unlock_irqrestore(&kaweth->device_lock, flags);
963
964         if (!kaweth->opened)
965                 return 0;
966         kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
967         kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
968
969         return 0;
970 }
971
972 /****************************************************************
973  *     kaweth_probe
974  ****************************************************************/
975 static int kaweth_probe(
976                 struct usb_interface *intf,
977                 const struct usb_device_id *id      /* from id_table */
978         )
979 {
980         struct usb_device *dev = interface_to_usbdev(intf);
981         struct kaweth_device *kaweth;
982         struct net_device *netdev;
983         const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
984         int result = 0;
985
986         dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x",
987                  dev->devnum,
988                  le16_to_cpu(dev->descriptor.idVendor),
989                  le16_to_cpu(dev->descriptor.idProduct),
990                  le16_to_cpu(dev->descriptor.bcdDevice));
991
992         dbg("Device at %p", dev);
993
994         dbg("Descriptor length: %x type: %x",
995                  (int)dev->descriptor.bLength,
996                  (int)dev->descriptor.bDescriptorType);
997
998         netdev = alloc_etherdev(sizeof(*kaweth));
999         if (!netdev)
1000                 return -ENOMEM;
1001
1002         kaweth = netdev_priv(netdev);
1003         kaweth->dev = dev;
1004         kaweth->net = netdev;
1005
1006         spin_lock_init(&kaweth->device_lock);
1007         init_waitqueue_head(&kaweth->term_wait);
1008
1009         dbg("Resetting.");
1010
1011         kaweth_reset(kaweth);
1012
1013         /*
1014          * If high byte of bcdDevice is nonzero, firmware is already
1015          * downloaded. Don't try to do it again, or we'll hang the device.
1016          */
1017
1018         if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) {
1019                 dev_info(&intf->dev, "Firmware present in device.\n");
1020         } else {
1021                 /* Download the firmware */
1022                 dev_info(&intf->dev, "Downloading firmware...\n");
1023                 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
1024                 if ((result = kaweth_download_firmware(kaweth,
1025                                                       "kaweth/new_code.bin",
1026                                                       100,
1027                                                       2)) < 0) {
1028                         err("Error downloading firmware (%d)", result);
1029                         goto err_fw;
1030                 }
1031
1032                 if ((result = kaweth_download_firmware(kaweth,
1033                                                       "kaweth/new_code_fix.bin",
1034                                                       100,
1035                                                       3)) < 0) {
1036                         err("Error downloading firmware fix (%d)", result);
1037                         goto err_fw;
1038                 }
1039
1040                 if ((result = kaweth_download_firmware(kaweth,
1041                                                       "kaweth/trigger_code.bin",
1042                                                       126,
1043                                                       2)) < 0) {
1044                         err("Error downloading trigger code (%d)", result);
1045                         goto err_fw;
1046
1047                 }
1048
1049                 if ((result = kaweth_download_firmware(kaweth,
1050                                                       "kaweth/trigger_code_fix.bin",
1051                                                       126,
1052                                                       3)) < 0) {
1053                         err("Error downloading trigger code fix (%d)", result);
1054                         goto err_fw;
1055                 }
1056
1057
1058                 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
1059                         err("Error triggering firmware (%d)", result);
1060                         goto err_fw;
1061                 }
1062
1063                 /* Device will now disappear for a moment...  */
1064                 dev_info(&intf->dev, "Firmware loaded.  I'll be back...\n");
1065 err_fw:
1066                 free_page((unsigned long)kaweth->firmware_buf);
1067                 free_netdev(netdev);
1068                 return -EIO;
1069         }
1070
1071         result = kaweth_read_configuration(kaweth);
1072
1073         if(result < 0) {
1074                 err("Error reading configuration (%d), no net device created", result);
1075                 goto err_free_netdev;
1076         }
1077
1078         dev_info(&intf->dev, "Statistics collection: %x\n", kaweth->configuration.statistics_mask);
1079         dev_info(&intf->dev, "Multicast filter limit: %x\n", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
1080         dev_info(&intf->dev, "MTU: %d\n", le16_to_cpu(kaweth->configuration.segment_size));
1081         dev_info(&intf->dev, "Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x\n",
1082                  (int)kaweth->configuration.hw_addr[0],
1083                  (int)kaweth->configuration.hw_addr[1],
1084                  (int)kaweth->configuration.hw_addr[2],
1085                  (int)kaweth->configuration.hw_addr[3],
1086                  (int)kaweth->configuration.hw_addr[4],
1087                  (int)kaweth->configuration.hw_addr[5]);
1088
1089         if(!memcmp(&kaweth->configuration.hw_addr,
1090                    &bcast_addr,
1091                    sizeof(bcast_addr))) {
1092                 err("Firmware not functioning properly, no net device created");
1093                 goto err_free_netdev;
1094         }
1095
1096         if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
1097                 dbg("Error setting URB size");
1098                 goto err_free_netdev;
1099         }
1100
1101         if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
1102                 err("Error setting SOFS wait");
1103                 goto err_free_netdev;
1104         }
1105
1106         result = kaweth_set_receive_filter(kaweth,
1107                                            KAWETH_PACKET_FILTER_DIRECTED |
1108                                            KAWETH_PACKET_FILTER_BROADCAST |
1109                                            KAWETH_PACKET_FILTER_MULTICAST);
1110
1111         if(result < 0) {
1112                 err("Error setting receive filter");
1113                 goto err_free_netdev;
1114         }
1115
1116         dbg("Initializing net device.");
1117
1118         kaweth->intf = intf;
1119
1120         kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1121         if (!kaweth->tx_urb)
1122                 goto err_free_netdev;
1123         kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1124         if (!kaweth->rx_urb)
1125                 goto err_only_tx;
1126         kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1127         if (!kaweth->irq_urb)
1128                 goto err_tx_and_rx;
1129
1130         kaweth->intbuffer = usb_buffer_alloc(   kaweth->dev,
1131                                                 INTBUFFERSIZE,
1132                                                 GFP_KERNEL,
1133                                                 &kaweth->intbufferhandle);
1134         if (!kaweth->intbuffer)
1135                 goto err_tx_and_rx_and_irq;
1136         kaweth->rx_buf = usb_buffer_alloc(      kaweth->dev,
1137                                                 KAWETH_BUF_SIZE,
1138                                                 GFP_KERNEL,
1139                                                 &kaweth->rxbufferhandle);
1140         if (!kaweth->rx_buf)
1141                 goto err_all_but_rxbuf;
1142
1143         memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr));
1144         memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr,
1145                sizeof(kaweth->configuration.hw_addr));
1146
1147         netdev->open = kaweth_open;
1148         netdev->stop = kaweth_close;
1149
1150         netdev->watchdog_timeo = KAWETH_TX_TIMEOUT;
1151         netdev->tx_timeout = kaweth_tx_timeout;
1152
1153         netdev->hard_start_xmit = kaweth_start_xmit;
1154         netdev->set_multicast_list = kaweth_set_rx_mode;
1155         netdev->get_stats = kaweth_netdev_stats;
1156         netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size);
1157         SET_ETHTOOL_OPS(netdev, &ops);
1158
1159         /* kaweth is zeroed as part of alloc_netdev */
1160
1161         INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl);
1162
1163         usb_set_intfdata(intf, kaweth);
1164
1165 #if 0
1166 // dma_supported() is deeply broken on almost all architectures
1167         if (dma_supported (&intf->dev, 0xffffffffffffffffULL))
1168                 kaweth->net->features |= NETIF_F_HIGHDMA;
1169 #endif
1170
1171         SET_NETDEV_DEV(netdev, &intf->dev);
1172         if (register_netdev(netdev) != 0) {
1173                 err("Error registering netdev.");
1174                 goto err_intfdata;
1175         }
1176
1177         dev_info(&intf->dev, "kaweth interface created at %s\n",
1178                  kaweth->net->name);
1179
1180         dbg("Kaweth probe returning.");
1181
1182         return 0;
1183
1184 err_intfdata:
1185         usb_set_intfdata(intf, NULL);
1186         usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1187 err_all_but_rxbuf:
1188         usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1189 err_tx_and_rx_and_irq:
1190         usb_free_urb(kaweth->irq_urb);
1191 err_tx_and_rx:
1192         usb_free_urb(kaweth->rx_urb);
1193 err_only_tx:
1194         usb_free_urb(kaweth->tx_urb);
1195 err_free_netdev:
1196         free_netdev(netdev);
1197
1198         return -EIO;
1199 }
1200
1201 /****************************************************************
1202  *     kaweth_disconnect
1203  ****************************************************************/
1204 static void kaweth_disconnect(struct usb_interface *intf)
1205 {
1206         struct kaweth_device *kaweth = usb_get_intfdata(intf);
1207         struct net_device *netdev;
1208
1209         dev_info(&intf->dev, "Unregistering\n");
1210
1211         usb_set_intfdata(intf, NULL);
1212         if (!kaweth) {
1213                 dev_warn(&intf->dev, "unregistering non-existant device\n");
1214                 return;
1215         }
1216         netdev = kaweth->net;
1217
1218         dbg("Unregistering net device");
1219         unregister_netdev(netdev);
1220
1221         usb_free_urb(kaweth->rx_urb);
1222         usb_free_urb(kaweth->tx_urb);
1223         usb_free_urb(kaweth->irq_urb);
1224
1225         usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1226         usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1227
1228         free_netdev(netdev);
1229 }
1230
1231
1232 // FIXME this completion stuff is a modified clone of
1233 // an OLD version of some stuff in usb.c ...
1234 struct usb_api_data {
1235         wait_queue_head_t wqh;
1236         int done;
1237 };
1238
1239 /*-------------------------------------------------------------------*
1240  * completion handler for compatibility wrappers (sync control/bulk) *
1241  *-------------------------------------------------------------------*/
1242 static void usb_api_blocking_completion(struct urb *urb)
1243 {
1244         struct usb_api_data *awd = (struct usb_api_data *)urb->context;
1245
1246         awd->done=1;
1247         wake_up(&awd->wqh);
1248 }
1249
1250 /*-------------------------------------------------------------------*
1251  *                         COMPATIBILITY STUFF                       *
1252  *-------------------------------------------------------------------*/
1253
1254 // Starts urb and waits for completion or timeout
1255 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
1256 {
1257         struct usb_api_data awd;
1258         int status;
1259
1260         init_waitqueue_head(&awd.wqh);
1261         awd.done = 0;
1262
1263         urb->context = &awd;
1264         status = usb_submit_urb(urb, GFP_NOIO);
1265         if (status) {
1266                 // something went wrong
1267                 usb_free_urb(urb);
1268                 return status;
1269         }
1270
1271         if (!wait_event_timeout(awd.wqh, awd.done, timeout)) {
1272                 // timeout
1273                 dev_warn(&urb->dev->dev, "usb_control/bulk_msg: timeout\n");
1274                 usb_kill_urb(urb);  // remove urb safely
1275                 status = -ETIMEDOUT;
1276         }
1277         else {
1278                 status = urb->status;
1279         }
1280
1281         if (actual_length) {
1282                 *actual_length = urb->actual_length;
1283         }
1284
1285         usb_free_urb(urb);
1286         return status;
1287 }
1288
1289 /*-------------------------------------------------------------------*/
1290 // returns status (negative) or length (positive)
1291 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
1292                                        unsigned int pipe,
1293                                        struct usb_ctrlrequest *cmd, void *data,
1294                                        int len, int timeout)
1295 {
1296         struct urb *urb;
1297         int retv;
1298         int length = 0; /* shut up GCC */
1299
1300         urb = usb_alloc_urb(0, GFP_NOIO);
1301         if (!urb)
1302                 return -ENOMEM;
1303
1304         usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data,
1305                          len, usb_api_blocking_completion, NULL);
1306
1307         retv = usb_start_wait_urb(urb, timeout, &length);
1308         if (retv < 0) {
1309                 return retv;
1310         }
1311         else {
1312                 return length;
1313         }
1314 }
1315
1316
1317 /****************************************************************
1318  *     kaweth_init
1319  ****************************************************************/
1320 static int __init kaweth_init(void)
1321 {
1322         dbg("Driver loading");
1323         return usb_register(&kaweth_driver);
1324 }
1325
1326 /****************************************************************
1327  *     kaweth_exit
1328  ****************************************************************/
1329 static void __exit kaweth_exit(void)
1330 {
1331         usb_deregister(&kaweth_driver);
1332 }
1333
1334 module_init(kaweth_init);
1335 module_exit(kaweth_exit);
1336
1337
1338
1339
1340
1341
1342
1343
1344