Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm
[linux-2.6] / drivers / usb / net / 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/pci.h>
59 #include <linux/dma-mapping.h>
60 #include <linux/wait.h>
61 #include <asm/uaccess.h>
62 #include <asm/semaphore.h>
63 #include <asm/byteorder.h>
64
65 #undef DEBUG
66
67 #include "kawethfw.h"
68
69 #define KAWETH_MTU                      1514
70 #define KAWETH_BUF_SIZE                 1664
71 #define KAWETH_TX_TIMEOUT               (5 * HZ)
72 #define KAWETH_SCRATCH_SIZE             32
73 #define KAWETH_FIRMWARE_BUF_SIZE        4096
74 #define KAWETH_CONTROL_TIMEOUT          (30 * HZ)
75
76 #define KAWETH_STATUS_BROKEN            0x0000001
77 #define KAWETH_STATUS_CLOSING           0x0000002
78 #define KAWETH_STATUS_SUSPENDING        0x0000004
79
80 #define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING)
81
82 #define KAWETH_PACKET_FILTER_PROMISCUOUS        0x01
83 #define KAWETH_PACKET_FILTER_ALL_MULTICAST      0x02
84 #define KAWETH_PACKET_FILTER_DIRECTED           0x04
85 #define KAWETH_PACKET_FILTER_BROADCAST          0x08
86 #define KAWETH_PACKET_FILTER_MULTICAST          0x10
87
88 /* Table 7 */
89 #define KAWETH_COMMAND_GET_ETHERNET_DESC        0x00
90 #define KAWETH_COMMAND_MULTICAST_FILTERS        0x01
91 #define KAWETH_COMMAND_SET_PACKET_FILTER        0x02
92 #define KAWETH_COMMAND_STATISTICS               0x03
93 #define KAWETH_COMMAND_SET_TEMP_MAC             0x06
94 #define KAWETH_COMMAND_GET_TEMP_MAC             0x07
95 #define KAWETH_COMMAND_SET_URB_SIZE             0x08
96 #define KAWETH_COMMAND_SET_SOFS_WAIT            0x09
97 #define KAWETH_COMMAND_SCAN                     0xFF
98
99 #define KAWETH_SOFS_TO_WAIT                     0x05
100
101 #define INTBUFFERSIZE                           4
102
103 #define STATE_OFFSET                            0
104 #define STATE_MASK                              0x40
105 #define STATE_SHIFT                             5
106
107 #define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED)
108
109
110 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>");
111 MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver");
112 MODULE_LICENSE("GPL");
113
114 static const char driver_name[] = "kaweth";
115
116 static int kaweth_probe(
117                 struct usb_interface *intf,
118                 const struct usb_device_id *id  /* from id_table */
119         );
120 static void kaweth_disconnect(struct usb_interface *intf);
121 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
122                                        unsigned int pipe,
123                                        struct usb_ctrlrequest *cmd, void *data,
124                                        int len, int timeout);
125 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message);
126 static int kaweth_resume(struct usb_interface *intf);
127
128 /****************************************************************
129  *     usb_device_id
130  ****************************************************************/
131 static struct usb_device_id usb_klsi_table[] = {
132         { USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */
133         { USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */
134         { USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */
135         { USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */
136         { USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */
137         { USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */
138         { USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */
139         { USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */
140         { USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */
141         { USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */
142         { USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */
143         { USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */
144         { USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */
145         { USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */
146         { USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */
147         { USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */
148         { USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */
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 /****************************************************************
255  *     kaweth_control
256  ****************************************************************/
257 static int kaweth_control(struct kaweth_device *kaweth,
258                           unsigned int pipe,
259                           __u8 request,
260                           __u8 requesttype,
261                           __u16 value,
262                           __u16 index,
263                           void *data,
264                           __u16 size,
265                           int timeout)
266 {
267         struct usb_ctrlrequest *dr;
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_le16p(&value);
286         dr->wIndex = cpu_to_le16p(&index);
287         dr->wLength = cpu_to_le16p(&size);
288
289         return kaweth_internal_control_msg(kaweth->dev,
290                                         pipe,
291                                         dr,
292                                         data,
293                                         size,
294                                         timeout);
295 }
296
297 /****************************************************************
298  *     kaweth_read_configuration
299  ****************************************************************/
300 static int kaweth_read_configuration(struct kaweth_device *kaweth)
301 {
302         int retval;
303
304         dbg("Reading kaweth configuration");
305
306         retval = kaweth_control(kaweth,
307                                 usb_rcvctrlpipe(kaweth->dev, 0),
308                                 KAWETH_COMMAND_GET_ETHERNET_DESC,
309                                 USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE,
310                                 0,
311                                 0,
312                                 (void *)&kaweth->configuration,
313                                 sizeof(kaweth->configuration),
314                                 KAWETH_CONTROL_TIMEOUT);
315
316         return retval;
317 }
318
319 /****************************************************************
320  *     kaweth_set_urb_size
321  ****************************************************************/
322 static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size)
323 {
324         int retval;
325
326         dbg("Setting URB size to %d", (unsigned)urb_size);
327
328         retval = kaweth_control(kaweth,
329                                 usb_sndctrlpipe(kaweth->dev, 0),
330                                 KAWETH_COMMAND_SET_URB_SIZE,
331                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
332                                 urb_size,
333                                 0,
334                                 (void *)&kaweth->scratch,
335                                 0,
336                                 KAWETH_CONTROL_TIMEOUT);
337
338         return retval;
339 }
340
341 /****************************************************************
342  *     kaweth_set_sofs_wait
343  ****************************************************************/
344 static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait)
345 {
346         int retval;
347
348         dbg("Set SOFS wait to %d", (unsigned)sofs_wait);
349
350         retval = kaweth_control(kaweth,
351                                 usb_sndctrlpipe(kaweth->dev, 0),
352                                 KAWETH_COMMAND_SET_SOFS_WAIT,
353                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
354                                 sofs_wait,
355                                 0,
356                                 (void *)&kaweth->scratch,
357                                 0,
358                                 KAWETH_CONTROL_TIMEOUT);
359
360         return retval;
361 }
362
363 /****************************************************************
364  *     kaweth_set_receive_filter
365  ****************************************************************/
366 static int kaweth_set_receive_filter(struct kaweth_device *kaweth,
367                                      __u16 receive_filter)
368 {
369         int retval;
370
371         dbg("Set receive filter to %d", (unsigned)receive_filter);
372
373         retval = kaweth_control(kaweth,
374                                 usb_sndctrlpipe(kaweth->dev, 0),
375                                 KAWETH_COMMAND_SET_PACKET_FILTER,
376                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
377                                 receive_filter,
378                                 0,
379                                 (void *)&kaweth->scratch,
380                                 0,
381                                 KAWETH_CONTROL_TIMEOUT);
382
383         return retval;
384 }
385
386 /****************************************************************
387  *     kaweth_download_firmware
388  ****************************************************************/
389 static int kaweth_download_firmware(struct kaweth_device *kaweth,
390                                     __u8 *data,
391                                     __u16 data_len,
392                                     __u8 interrupt,
393                                     __u8 type)
394 {
395         if(data_len > KAWETH_FIRMWARE_BUF_SIZE) {
396                 err("Firmware too big: %d", data_len);
397                 return -ENOSPC;
398         }
399
400         memcpy(kaweth->firmware_buf, data, data_len);
401
402         kaweth->firmware_buf[2] = (data_len & 0xFF) - 7;
403         kaweth->firmware_buf[3] = data_len >> 8;
404         kaweth->firmware_buf[4] = type;
405         kaweth->firmware_buf[5] = interrupt;
406
407         dbg("High: %i, Low:%i", kaweth->firmware_buf[3],
408                    kaweth->firmware_buf[2]);
409
410         dbg("Downloading firmware at %p to kaweth device at %p",
411             data,
412             kaweth);
413         dbg("Firmware length: %d", data_len);
414
415         return kaweth_control(kaweth,
416                               usb_sndctrlpipe(kaweth->dev, 0),
417                               KAWETH_COMMAND_SCAN,
418                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
419                               0,
420                               0,
421                               (void *)kaweth->firmware_buf,
422                               data_len,
423                               KAWETH_CONTROL_TIMEOUT);
424 }
425
426 /****************************************************************
427  *     kaweth_trigger_firmware
428  ****************************************************************/
429 static int kaweth_trigger_firmware(struct kaweth_device *kaweth,
430                                    __u8 interrupt)
431 {
432         kaweth->firmware_buf[0] = 0xB6;
433         kaweth->firmware_buf[1] = 0xC3;
434         kaweth->firmware_buf[2] = 0x01;
435         kaweth->firmware_buf[3] = 0x00;
436         kaweth->firmware_buf[4] = 0x06;
437         kaweth->firmware_buf[5] = interrupt;
438         kaweth->firmware_buf[6] = 0x00;
439         kaweth->firmware_buf[7] = 0x00;
440
441         dbg("Triggering firmware");
442
443         return kaweth_control(kaweth,
444                               usb_sndctrlpipe(kaweth->dev, 0),
445                               KAWETH_COMMAND_SCAN,
446                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
447                               0,
448                               0,
449                               (void *)kaweth->firmware_buf,
450                               8,
451                               KAWETH_CONTROL_TIMEOUT);
452 }
453
454 /****************************************************************
455  *     kaweth_reset
456  ****************************************************************/
457 static int kaweth_reset(struct kaweth_device *kaweth)
458 {
459         int result;
460
461         dbg("kaweth_reset(%p)", kaweth);
462         result = kaweth_control(kaweth,
463                                 usb_sndctrlpipe(kaweth->dev, 0),
464                                 USB_REQ_SET_CONFIGURATION,
465                                 0,
466                                 kaweth->dev->config[0].desc.bConfigurationValue,
467                                 0,
468                                 NULL,
469                                 0,
470                                 KAWETH_CONTROL_TIMEOUT);
471
472         mdelay(10);
473
474         dbg("kaweth_reset() returns %d.",result);
475
476         return result;
477 }
478
479 static void kaweth_usb_receive(struct urb *);
480 static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t);
481
482 /****************************************************************
483         int_callback
484 *****************************************************************/
485
486 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf)
487 {
488         int status;
489
490         status = usb_submit_urb (kaweth->irq_urb, mf);
491         if (unlikely(status == -ENOMEM)) {
492                 kaweth->suspend_lowmem_ctrl = 1;
493                 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
494         } else {
495                 kaweth->suspend_lowmem_ctrl = 0;
496         }
497
498         if (status)
499                 err ("can't resubmit intr, %s-%s, status %d",
500                                 kaweth->dev->bus->bus_name,
501                                 kaweth->dev->devpath, status);
502 }
503
504 static void int_callback(struct urb *u)
505 {
506         struct kaweth_device *kaweth = u->context;
507         int act_state;
508
509         switch (u->status) {
510         case 0:                 /* success */
511                 break;
512         case -ECONNRESET:       /* unlink */
513         case -ENOENT:
514         case -ESHUTDOWN:
515                 return;
516         /* -EPIPE:  should clear the halt */
517         default:                /* error */
518                 goto resubmit;
519         }
520
521         /* we check the link state to report changes */
522         if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) {
523                 if (act_state)
524                         netif_carrier_on(kaweth->net);
525                 else
526                         netif_carrier_off(kaweth->net);
527
528                 kaweth->linkstate = act_state;
529         }
530 resubmit:
531         kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC);
532 }
533
534 static void kaweth_resubmit_tl(struct work_struct *work)
535 {
536         struct kaweth_device *kaweth =
537                 container_of(work, struct kaweth_device, lowmem_work.work);
538
539         if (IS_BLOCKED(kaweth->status))
540                 return;
541
542         if (kaweth->suspend_lowmem_rx)
543                 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
544
545         if (kaweth->suspend_lowmem_ctrl)
546                 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
547 }
548
549
550 /****************************************************************
551  *     kaweth_resubmit_rx_urb
552  ****************************************************************/
553 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth,
554                                                 gfp_t mem_flags)
555 {
556         int result;
557
558         usb_fill_bulk_urb(kaweth->rx_urb,
559                       kaweth->dev,
560                       usb_rcvbulkpipe(kaweth->dev, 1),
561                       kaweth->rx_buf,
562                       KAWETH_BUF_SIZE,
563                       kaweth_usb_receive,
564                       kaweth);
565         kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
566         kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle;
567
568         if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) {
569                 if (result == -ENOMEM) {
570                         kaweth->suspend_lowmem_rx = 1;
571                         schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
572                 }
573                 err("resubmitting rx_urb %d failed", result);
574         } else {
575                 kaweth->suspend_lowmem_rx = 0;
576         }
577
578         return result;
579 }
580
581 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth);
582
583 /****************************************************************
584  *     kaweth_usb_receive
585  ****************************************************************/
586 static void kaweth_usb_receive(struct urb *urb)
587 {
588         struct kaweth_device *kaweth = urb->context;
589         struct net_device *net = kaweth->net;
590
591         int count = urb->actual_length;
592         int count2 = urb->transfer_buffer_length;
593
594         __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf);
595
596         struct sk_buff *skb;
597
598         if(unlikely(urb->status == -ECONNRESET || urb->status == -ESHUTDOWN))
599         /* we are killed - set a flag and wake the disconnect handler */
600         {
601                 kaweth->end = 1;
602                 wake_up(&kaweth->term_wait);
603                 return;
604         }
605
606         spin_lock(&kaweth->device_lock);
607         if (IS_BLOCKED(kaweth->status)) {
608                 spin_unlock(&kaweth->device_lock);
609                 return;
610         }
611         spin_unlock(&kaweth->device_lock);
612
613         if(urb->status && urb->status != -EREMOTEIO && count != 1) {
614                 err("%s RX status: %d count: %d packet_len: %d",
615                            net->name,
616                            urb->status,
617                            count,
618                            (int)pkt_len);
619                 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
620                 return;
621         }
622
623         if(kaweth->net && (count > 2)) {
624                 if(pkt_len > (count - 2)) {
625                         err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count);
626                         err("Packet len & 2047: %x", pkt_len & 2047);
627                         err("Count 2: %x", count2);
628                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
629                         return;
630                 }
631
632                 if(!(skb = dev_alloc_skb(pkt_len+2))) {
633                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
634                         return;
635                 }
636
637                 skb_reserve(skb, 2);    /* Align IP on 16 byte boundaries */
638
639                 skb->dev = net;
640
641                 eth_copy_and_sum(skb, kaweth->rx_buf + 2, pkt_len, 0);
642
643                 skb_put(skb, pkt_len);
644
645                 skb->protocol = eth_type_trans(skb, net);
646
647                 netif_rx(skb);
648
649                 kaweth->stats.rx_packets++;
650                 kaweth->stats.rx_bytes += pkt_len;
651         }
652
653         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
654 }
655
656 /****************************************************************
657  *     kaweth_open
658  ****************************************************************/
659 static int kaweth_open(struct net_device *net)
660 {
661         struct kaweth_device *kaweth = netdev_priv(net);
662         int res;
663
664         dbg("Opening network device.");
665
666         res = usb_autopm_get_interface(kaweth->intf);
667         if (res) {
668                 err("Interface cannot be resumed.");
669                 return -EIO;
670         }
671         res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL);
672         if (res)
673                 goto err_out;
674
675         usb_fill_int_urb(
676                 kaweth->irq_urb,
677                 kaweth->dev,
678                 usb_rcvintpipe(kaweth->dev, 3),
679                 kaweth->intbuffer,
680                 INTBUFFERSIZE,
681                 int_callback,
682                 kaweth,
683                 250); /* overriding the descriptor */
684         kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle;
685         kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
686
687         res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL);
688         if (res) {
689                 usb_kill_urb(kaweth->rx_urb);
690                 goto err_out;
691         }
692         kaweth->opened = 1;
693
694         netif_start_queue(net);
695
696         kaweth_async_set_rx_mode(kaweth);
697         return 0;
698
699 err_out:
700         usb_autopm_enable(kaweth->intf);
701         return -EIO;
702 }
703
704 /****************************************************************
705  *     kaweth_kill_urbs
706  ****************************************************************/
707 static void kaweth_kill_urbs(struct kaweth_device *kaweth)
708 {
709         usb_kill_urb(kaweth->irq_urb);
710         usb_kill_urb(kaweth->rx_urb);
711         usb_kill_urb(kaweth->tx_urb);
712
713         flush_scheduled_work();
714
715         /* a scheduled work may have resubmitted,
716            we hit them again */
717         usb_kill_urb(kaweth->irq_urb);
718         usb_kill_urb(kaweth->rx_urb);
719 }
720
721 /****************************************************************
722  *     kaweth_close
723  ****************************************************************/
724 static int kaweth_close(struct net_device *net)
725 {
726         struct kaweth_device *kaweth = netdev_priv(net);
727
728         netif_stop_queue(net);
729         kaweth->opened = 0;
730
731         kaweth->status |= KAWETH_STATUS_CLOSING;
732
733         kaweth_kill_urbs(kaweth);
734
735         kaweth->status &= ~KAWETH_STATUS_CLOSING;
736
737         usb_autopm_enable(kaweth->intf);
738
739         return 0;
740 }
741
742 static void kaweth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
743 {
744         struct kaweth_device *kaweth = netdev_priv(dev);
745
746         strlcpy(info->driver, driver_name, sizeof(info->driver));
747         usb_make_path(kaweth->dev, info->bus_info, sizeof (info->bus_info));
748 }
749
750 static u32 kaweth_get_link(struct net_device *dev)
751 {
752         struct kaweth_device *kaweth = netdev_priv(dev);
753
754         return kaweth->linkstate;
755 }
756
757 static struct ethtool_ops ops = {
758         .get_drvinfo    = kaweth_get_drvinfo,
759         .get_link       = kaweth_get_link
760 };
761
762 /****************************************************************
763  *     kaweth_usb_transmit_complete
764  ****************************************************************/
765 static void kaweth_usb_transmit_complete(struct urb *urb)
766 {
767         struct kaweth_device *kaweth = urb->context;
768         struct sk_buff *skb = kaweth->tx_skb;
769
770         if (unlikely(urb->status != 0))
771                 if (urb->status != -ENOENT)
772                         dbg("%s: TX status %d.", kaweth->net->name, urb->status);
773
774         netif_wake_queue(kaweth->net);
775         dev_kfree_skb_irq(skb);
776 }
777
778 /****************************************************************
779  *     kaweth_start_xmit
780  ****************************************************************/
781 static int kaweth_start_xmit(struct sk_buff *skb, struct net_device *net)
782 {
783         struct kaweth_device *kaweth = netdev_priv(net);
784         __le16 *private_header;
785
786         int res;
787
788         spin_lock(&kaweth->device_lock);
789
790         kaweth_async_set_rx_mode(kaweth);
791         netif_stop_queue(net);
792         if (IS_BLOCKED(kaweth->status)) {
793                 goto skip;
794         }
795
796         /* We now decide whether we can put our special header into the sk_buff */
797         if (skb_cloned(skb) || skb_headroom(skb) < 2) {
798                 /* no such luck - we make our own */
799                 struct sk_buff *copied_skb;
800                 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC);
801                 dev_kfree_skb_irq(skb);
802                 skb = copied_skb;
803                 if (!copied_skb) {
804                         kaweth->stats.tx_errors++;
805                         netif_start_queue(net);
806                         spin_unlock(&kaweth->device_lock);
807                         return 0;
808                 }
809         }
810
811         private_header = (__le16 *)__skb_push(skb, 2);
812         *private_header = cpu_to_le16(skb->len-2);
813         kaweth->tx_skb = skb;
814
815         usb_fill_bulk_urb(kaweth->tx_urb,
816                       kaweth->dev,
817                       usb_sndbulkpipe(kaweth->dev, 2),
818                       private_header,
819                       skb->len,
820                       kaweth_usb_transmit_complete,
821                       kaweth);
822         kaweth->end = 0;
823
824         if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
825         {
826                 warn("kaweth failed tx_urb %d", res);
827 skip:
828                 kaweth->stats.tx_errors++;
829
830                 netif_start_queue(net);
831                 dev_kfree_skb_irq(skb);
832         }
833         else
834         {
835                 kaweth->stats.tx_packets++;
836                 kaweth->stats.tx_bytes += skb->len;
837                 net->trans_start = jiffies;
838         }
839
840         spin_unlock(&kaweth->device_lock);
841
842         return 0;
843 }
844
845 /****************************************************************
846  *     kaweth_set_rx_mode
847  ****************************************************************/
848 static void kaweth_set_rx_mode(struct net_device *net)
849 {
850         struct kaweth_device *kaweth = netdev_priv(net);
851
852         __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
853                                      KAWETH_PACKET_FILTER_BROADCAST |
854                                      KAWETH_PACKET_FILTER_MULTICAST;
855
856         dbg("Setting Rx mode to %d", packet_filter_bitmap);
857
858         netif_stop_queue(net);
859
860         if (net->flags & IFF_PROMISC) {
861                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
862         }
863         else if ((net->mc_count) || (net->flags & IFF_ALLMULTI)) {
864                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
865         }
866
867         kaweth->packet_filter_bitmap = packet_filter_bitmap;
868         netif_wake_queue(net);
869 }
870
871 /****************************************************************
872  *     kaweth_async_set_rx_mode
873  ****************************************************************/
874 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
875 {
876         __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
877         kaweth->packet_filter_bitmap = 0;
878         if (packet_filter_bitmap == 0)
879                 return;
880
881         {
882         int result;
883         result = kaweth_control(kaweth,
884                                 usb_sndctrlpipe(kaweth->dev, 0),
885                                 KAWETH_COMMAND_SET_PACKET_FILTER,
886                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
887                                 packet_filter_bitmap,
888                                 0,
889                                 (void *)&kaweth->scratch,
890                                 0,
891                                 KAWETH_CONTROL_TIMEOUT);
892
893         if(result < 0) {
894                 err("Failed to set Rx mode: %d", result);
895         }
896         else {
897                 dbg("Set Rx mode to %d", packet_filter_bitmap);
898         }
899         }
900 }
901
902 /****************************************************************
903  *     kaweth_netdev_stats
904  ****************************************************************/
905 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev)
906 {
907         struct kaweth_device *kaweth = netdev_priv(dev);
908         return &kaweth->stats;
909 }
910
911 /****************************************************************
912  *     kaweth_tx_timeout
913  ****************************************************************/
914 static void kaweth_tx_timeout(struct net_device *net)
915 {
916         struct kaweth_device *kaweth = netdev_priv(net);
917
918         warn("%s: Tx timed out. Resetting.", net->name);
919         kaweth->stats.tx_errors++;
920         net->trans_start = jiffies;
921
922         usb_unlink_urb(kaweth->tx_urb);
923 }
924
925 /****************************************************************
926  *     kaweth_suspend
927  ****************************************************************/
928 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message)
929 {
930         struct kaweth_device *kaweth = usb_get_intfdata(intf);
931         unsigned long flags;
932
933         dbg("Suspending device");
934         spin_lock_irqsave(&kaweth->device_lock, flags);
935         kaweth->status |= KAWETH_STATUS_SUSPENDING;
936         spin_unlock_irqrestore(&kaweth->device_lock, flags);
937
938         kaweth_kill_urbs(kaweth);
939         return 0;
940 }
941
942 /****************************************************************
943  *     kaweth_resume
944  ****************************************************************/
945 static int kaweth_resume(struct usb_interface *intf)
946 {
947         struct kaweth_device *kaweth = usb_get_intfdata(intf);
948         unsigned long flags;
949
950         dbg("Resuming device");
951         spin_lock_irqsave(&kaweth->device_lock, flags);
952         kaweth->status &= ~KAWETH_STATUS_SUSPENDING;
953         spin_unlock_irqrestore(&kaweth->device_lock, flags);
954
955         if (!kaweth->opened)
956                 return 0;
957         kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
958         kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
959
960         return 0;
961 }
962
963 /****************************************************************
964  *     kaweth_probe
965  ****************************************************************/
966 static int kaweth_probe(
967                 struct usb_interface *intf,
968                 const struct usb_device_id *id      /* from id_table */
969         )
970 {
971         struct usb_device *dev = interface_to_usbdev(intf);
972         struct kaweth_device *kaweth;
973         struct net_device *netdev;
974         const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
975         int result = 0;
976
977         dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x",
978                  dev->devnum,
979                  le16_to_cpu(dev->descriptor.idVendor),
980                  le16_to_cpu(dev->descriptor.idProduct),
981                  le16_to_cpu(dev->descriptor.bcdDevice));
982
983         dbg("Device at %p", dev);
984
985         dbg("Descriptor length: %x type: %x",
986                  (int)dev->descriptor.bLength,
987                  (int)dev->descriptor.bDescriptorType);
988
989         netdev = alloc_etherdev(sizeof(*kaweth));
990         if (!netdev)
991                 return -ENOMEM;
992
993         kaweth = netdev_priv(netdev);
994         kaweth->dev = dev;
995         kaweth->net = netdev;
996
997         spin_lock_init(&kaweth->device_lock);
998         init_waitqueue_head(&kaweth->term_wait);
999
1000         dbg("Resetting.");
1001
1002         kaweth_reset(kaweth);
1003
1004         /*
1005          * If high byte of bcdDevice is nonzero, firmware is already
1006          * downloaded. Don't try to do it again, or we'll hang the device.
1007          */
1008
1009         if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) {
1010                 info("Firmware present in device.");
1011         } else {
1012                 /* Download the firmware */
1013                 info("Downloading firmware...");
1014                 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
1015                 if ((result = kaweth_download_firmware(kaweth,
1016                                                       kaweth_new_code,
1017                                                       len_kaweth_new_code,
1018                                                       100,
1019                                                       2)) < 0) {
1020                         err("Error downloading firmware (%d)", result);
1021                         goto err_fw;
1022                 }
1023
1024                 if ((result = kaweth_download_firmware(kaweth,
1025                                                       kaweth_new_code_fix,
1026                                                       len_kaweth_new_code_fix,
1027                                                       100,
1028                                                       3)) < 0) {
1029                         err("Error downloading firmware fix (%d)", result);
1030                         goto err_fw;
1031                 }
1032
1033                 if ((result = kaweth_download_firmware(kaweth,
1034                                                       kaweth_trigger_code,
1035                                                       len_kaweth_trigger_code,
1036                                                       126,
1037                                                       2)) < 0) {
1038                         err("Error downloading trigger code (%d)", result);
1039                         goto err_fw;
1040
1041                 }
1042
1043                 if ((result = kaweth_download_firmware(kaweth,
1044                                                       kaweth_trigger_code_fix,
1045                                                       len_kaweth_trigger_code_fix,
1046                                                       126,
1047                                                       3)) < 0) {
1048                         err("Error downloading trigger code fix (%d)", result);
1049                         goto err_fw;
1050                 }
1051
1052
1053                 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
1054                         err("Error triggering firmware (%d)", result);
1055                         goto err_fw;
1056                 }
1057
1058                 /* Device will now disappear for a moment...  */
1059                 info("Firmware loaded.  I'll be back...");
1060 err_fw:
1061                 free_page((unsigned long)kaweth->firmware_buf);
1062                 free_netdev(netdev);
1063                 return -EIO;
1064         }
1065
1066         result = kaweth_read_configuration(kaweth);
1067
1068         if(result < 0) {
1069                 err("Error reading configuration (%d), no net device created", result);
1070                 goto err_free_netdev;
1071         }
1072
1073         info("Statistics collection: %x", kaweth->configuration.statistics_mask);
1074         info("Multicast filter limit: %x", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
1075         info("MTU: %d", le16_to_cpu(kaweth->configuration.segment_size));
1076         info("Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
1077                  (int)kaweth->configuration.hw_addr[0],
1078                  (int)kaweth->configuration.hw_addr[1],
1079                  (int)kaweth->configuration.hw_addr[2],
1080                  (int)kaweth->configuration.hw_addr[3],
1081                  (int)kaweth->configuration.hw_addr[4],
1082                  (int)kaweth->configuration.hw_addr[5]);
1083
1084         if(!memcmp(&kaweth->configuration.hw_addr,
1085                    &bcast_addr,
1086                    sizeof(bcast_addr))) {
1087                 err("Firmware not functioning properly, no net device created");
1088                 goto err_free_netdev;
1089         }
1090
1091         if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
1092                 dbg("Error setting URB size");
1093                 goto err_free_netdev;
1094         }
1095
1096         if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
1097                 err("Error setting SOFS wait");
1098                 goto err_free_netdev;
1099         }
1100
1101         result = kaweth_set_receive_filter(kaweth,
1102                                            KAWETH_PACKET_FILTER_DIRECTED |
1103                                            KAWETH_PACKET_FILTER_BROADCAST |
1104                                            KAWETH_PACKET_FILTER_MULTICAST);
1105
1106         if(result < 0) {
1107                 err("Error setting receive filter");
1108                 goto err_free_netdev;
1109         }
1110
1111         dbg("Initializing net device.");
1112
1113         kaweth->intf = intf;
1114
1115         kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1116         if (!kaweth->tx_urb)
1117                 goto err_free_netdev;
1118         kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1119         if (!kaweth->rx_urb)
1120                 goto err_only_tx;
1121         kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1122         if (!kaweth->irq_urb)
1123                 goto err_tx_and_rx;
1124
1125         kaweth->intbuffer = usb_buffer_alloc(   kaweth->dev,
1126                                                 INTBUFFERSIZE,
1127                                                 GFP_KERNEL,
1128                                                 &kaweth->intbufferhandle);
1129         if (!kaweth->intbuffer)
1130                 goto err_tx_and_rx_and_irq;
1131         kaweth->rx_buf = usb_buffer_alloc(      kaweth->dev,
1132                                                 KAWETH_BUF_SIZE,
1133                                                 GFP_KERNEL,
1134                                                 &kaweth->rxbufferhandle);
1135         if (!kaweth->rx_buf)
1136                 goto err_all_but_rxbuf;
1137
1138         memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr));
1139         memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr,
1140                sizeof(kaweth->configuration.hw_addr));
1141
1142         netdev->open = kaweth_open;
1143         netdev->stop = kaweth_close;
1144
1145         netdev->watchdog_timeo = KAWETH_TX_TIMEOUT;
1146         netdev->tx_timeout = kaweth_tx_timeout;
1147
1148         netdev->hard_start_xmit = kaweth_start_xmit;
1149         netdev->set_multicast_list = kaweth_set_rx_mode;
1150         netdev->get_stats = kaweth_netdev_stats;
1151         netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size);
1152         SET_ETHTOOL_OPS(netdev, &ops);
1153
1154         /* kaweth is zeroed as part of alloc_netdev */
1155
1156         INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl);
1157
1158         SET_MODULE_OWNER(netdev);
1159
1160         usb_set_intfdata(intf, kaweth);
1161
1162 #if 0
1163 // dma_supported() is deeply broken on almost all architectures
1164         if (dma_supported (&intf->dev, 0xffffffffffffffffULL))
1165                 kaweth->net->features |= NETIF_F_HIGHDMA;
1166 #endif
1167
1168         SET_NETDEV_DEV(netdev, &intf->dev);
1169         if (register_netdev(netdev) != 0) {
1170                 err("Error registering netdev.");
1171                 goto err_intfdata;
1172         }
1173
1174         info("kaweth interface created at %s", kaweth->net->name);
1175
1176         dbg("Kaweth probe returning.");
1177
1178         return 0;
1179
1180 err_intfdata:
1181         usb_set_intfdata(intf, NULL);
1182         usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1183 err_all_but_rxbuf:
1184         usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1185 err_tx_and_rx_and_irq:
1186         usb_free_urb(kaweth->irq_urb);
1187 err_tx_and_rx:
1188         usb_free_urb(kaweth->rx_urb);
1189 err_only_tx:
1190         usb_free_urb(kaweth->tx_urb);
1191 err_free_netdev:
1192         free_netdev(netdev);
1193
1194         return -EIO;
1195 }
1196
1197 /****************************************************************
1198  *     kaweth_disconnect
1199  ****************************************************************/
1200 static void kaweth_disconnect(struct usb_interface *intf)
1201 {
1202         struct kaweth_device *kaweth = usb_get_intfdata(intf);
1203         struct net_device *netdev;
1204
1205         info("Unregistering");
1206
1207         usb_set_intfdata(intf, NULL);
1208         if (!kaweth) {
1209                 warn("unregistering non-existant device");
1210                 return;
1211         }
1212         netdev = kaweth->net;
1213
1214         dbg("Unregistering net device");
1215         unregister_netdev(netdev);
1216
1217         usb_free_urb(kaweth->rx_urb);
1218         usb_free_urb(kaweth->tx_urb);
1219         usb_free_urb(kaweth->irq_urb);
1220
1221         usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1222         usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1223
1224         free_netdev(netdev);
1225 }
1226
1227
1228 // FIXME this completion stuff is a modified clone of
1229 // an OLD version of some stuff in usb.c ...
1230 struct usb_api_data {
1231         wait_queue_head_t wqh;
1232         int done;
1233 };
1234
1235 /*-------------------------------------------------------------------*
1236  * completion handler for compatibility wrappers (sync control/bulk) *
1237  *-------------------------------------------------------------------*/
1238 static void usb_api_blocking_completion(struct urb *urb)
1239 {
1240         struct usb_api_data *awd = (struct usb_api_data *)urb->context;
1241
1242         awd->done=1;
1243         wake_up(&awd->wqh);
1244 }
1245
1246 /*-------------------------------------------------------------------*
1247  *                         COMPATIBILITY STUFF                       *
1248  *-------------------------------------------------------------------*/
1249
1250 // Starts urb and waits for completion or timeout
1251 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
1252 {
1253         struct usb_api_data awd;
1254         int status;
1255
1256         init_waitqueue_head(&awd.wqh);
1257         awd.done = 0;
1258
1259         urb->context = &awd;
1260         status = usb_submit_urb(urb, GFP_NOIO);
1261         if (status) {
1262                 // something went wrong
1263                 usb_free_urb(urb);
1264                 return status;
1265         }
1266
1267         if (!wait_event_timeout(awd.wqh, awd.done, timeout)) {
1268                 // timeout
1269                 warn("usb_control/bulk_msg: timeout");
1270                 usb_kill_urb(urb);  // remove urb safely
1271                 status = -ETIMEDOUT;
1272         }
1273         else {
1274                 status = urb->status;
1275         }
1276
1277         if (actual_length) {
1278                 *actual_length = urb->actual_length;
1279         }
1280
1281         usb_free_urb(urb);
1282         return status;
1283 }
1284
1285 /*-------------------------------------------------------------------*/
1286 // returns status (negative) or length (positive)
1287 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
1288                                        unsigned int pipe,
1289                                        struct usb_ctrlrequest *cmd, void *data,
1290                                        int len, int timeout)
1291 {
1292         struct urb *urb;
1293         int retv;
1294         int length = 0; /* shut up GCC */
1295
1296         urb = usb_alloc_urb(0, GFP_NOIO);
1297         if (!urb)
1298                 return -ENOMEM;
1299
1300         usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data,
1301                          len, usb_api_blocking_completion, NULL);
1302
1303         retv = usb_start_wait_urb(urb, timeout, &length);
1304         if (retv < 0) {
1305                 return retv;
1306         }
1307         else {
1308                 return length;
1309         }
1310 }
1311
1312
1313 /****************************************************************
1314  *     kaweth_init
1315  ****************************************************************/
1316 static int __init kaweth_init(void)
1317 {
1318         dbg("Driver loading");
1319         return usb_register(&kaweth_driver);
1320 }
1321
1322 /****************************************************************
1323  *     kaweth_exit
1324  ****************************************************************/
1325 static void __exit kaweth_exit(void)
1326 {
1327         usb_deregister(&kaweth_driver);
1328 }
1329
1330 module_init(kaweth_init);
1331 module_exit(kaweth_exit);
1332
1333
1334
1335
1336
1337
1338
1339
1340