Merge master.kernel.org:/pub/scm/linux/kernel/git/bart/ide-2.6
[linux-2.6.git] / 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/dma-mapping.h>
59 #include <linux/wait.h>
60 #include <asm/uaccess.h>
61 #include <asm/semaphore.h>
62 #include <asm/byteorder.h>
63
64 #undef DEBUG
65
66 #include "kawethfw.h"
67
68 #define KAWETH_MTU                      1514
69 #define KAWETH_BUF_SIZE                 1664
70 #define KAWETH_TX_TIMEOUT               (5 * HZ)
71 #define KAWETH_SCRATCH_SIZE             32
72 #define KAWETH_FIRMWARE_BUF_SIZE        4096
73 #define KAWETH_CONTROL_TIMEOUT          (30 * HZ)
74
75 #define KAWETH_STATUS_BROKEN            0x0000001
76 #define KAWETH_STATUS_CLOSING           0x0000002
77 #define KAWETH_STATUS_SUSPENDING        0x0000004
78
79 #define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING)
80
81 #define KAWETH_PACKET_FILTER_PROMISCUOUS        0x01
82 #define KAWETH_PACKET_FILTER_ALL_MULTICAST      0x02
83 #define KAWETH_PACKET_FILTER_DIRECTED           0x04
84 #define KAWETH_PACKET_FILTER_BROADCAST          0x08
85 #define KAWETH_PACKET_FILTER_MULTICAST          0x10
86
87 /* Table 7 */
88 #define KAWETH_COMMAND_GET_ETHERNET_DESC        0x00
89 #define KAWETH_COMMAND_MULTICAST_FILTERS        0x01
90 #define KAWETH_COMMAND_SET_PACKET_FILTER        0x02
91 #define KAWETH_COMMAND_STATISTICS               0x03
92 #define KAWETH_COMMAND_SET_TEMP_MAC             0x06
93 #define KAWETH_COMMAND_GET_TEMP_MAC             0x07
94 #define KAWETH_COMMAND_SET_URB_SIZE             0x08
95 #define KAWETH_COMMAND_SET_SOFS_WAIT            0x09
96 #define KAWETH_COMMAND_SCAN                     0xFF
97
98 #define KAWETH_SOFS_TO_WAIT                     0x05
99
100 #define INTBUFFERSIZE                           4
101
102 #define STATE_OFFSET                            0
103 #define STATE_MASK                              0x40
104 #define STATE_SHIFT                             5
105
106 #define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED)
107
108
109 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>");
110 MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver");
111 MODULE_LICENSE("GPL");
112
113 static const char driver_name[] = "kaweth";
114
115 static int kaweth_probe(
116                 struct usb_interface *intf,
117                 const struct usb_device_id *id  /* from id_table */
118         );
119 static void kaweth_disconnect(struct usb_interface *intf);
120 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
121                                        unsigned int pipe,
122                                        struct usb_ctrlrequest *cmd, void *data,
123                                        int len, int timeout);
124 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message);
125 static int kaweth_resume(struct usb_interface *intf);
126
127 /****************************************************************
128  *     usb_device_id
129  ****************************************************************/
130 static struct usb_device_id usb_klsi_table[] = {
131         { USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */
132         { USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */
133         { USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */
134         { USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */
135         { USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */
136         { USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */
137         { USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */
138         { USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */
139         { USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */
140         { USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */
141         { USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */
142         { USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */
143         { USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */
144         { USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */
145         { USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */
146         { USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */
147         { USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */
148         { USB_DEVICE(0x0846, 0x1001) }, /* NetGear EA-101 */
149         { USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */
150         { USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */
151         { USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */
152         { USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */
153         { USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */
154         { USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */
155         { USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */
156         { USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */
157         { USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */
158         { USB_DEVICE(0x1485, 0x0001) }, /* Silicom U2E */
159         { USB_DEVICE(0x1485, 0x0002) }, /* Psion Dacom Gold Port Ethernet */
160         { USB_DEVICE(0x1645, 0x0005) }, /* Entrega E45 */
161         { USB_DEVICE(0x1645, 0x0008) }, /* Entrega USB Ethernet Adapter */
162         { USB_DEVICE(0x1645, 0x8005) }, /* PortGear Ethernet Adapter */
163         { USB_DEVICE(0x1668, 0x0323) }, /* Actiontec USB Ethernet */
164         { USB_DEVICE(0x2001, 0x4000) }, /* D-link DSB-650C */
165         {} /* Null terminator */
166 };
167
168 MODULE_DEVICE_TABLE (usb, usb_klsi_table);
169
170 /****************************************************************
171  *     kaweth_driver
172  ****************************************************************/
173 static struct usb_driver kaweth_driver = {
174         .name =         driver_name,
175         .probe =        kaweth_probe,
176         .disconnect =   kaweth_disconnect,
177         .suspend =      kaweth_suspend,
178         .resume =       kaweth_resume,
179         .id_table =     usb_klsi_table,
180         .supports_autosuspend = 1,
181 };
182
183 typedef __u8 eth_addr_t[6];
184
185 /****************************************************************
186  *     usb_eth_dev
187  ****************************************************************/
188 struct usb_eth_dev {
189         char *name;
190         __u16 vendor;
191         __u16 device;
192         void *pdata;
193 };
194
195 /****************************************************************
196  *     kaweth_ethernet_configuration
197  *     Refer Table 8
198  ****************************************************************/
199 struct kaweth_ethernet_configuration
200 {
201         __u8 size;
202         __u8 reserved1;
203         __u8 reserved2;
204         eth_addr_t hw_addr;
205         __u32 statistics_mask;
206         __le16 segment_size;
207         __u16 max_multicast_filters;
208         __u8 reserved3;
209 } __attribute__ ((packed));
210
211 /****************************************************************
212  *     kaweth_device
213  ****************************************************************/
214 struct kaweth_device
215 {
216         spinlock_t device_lock;
217
218         __u32 status;
219         int end;
220         int suspend_lowmem_rx;
221         int suspend_lowmem_ctrl;
222         int linkstate;
223         int opened;
224         struct delayed_work lowmem_work;
225
226         struct usb_device *dev;
227         struct usb_interface *intf;
228         struct net_device *net;
229         wait_queue_head_t term_wait;
230
231         struct urb *rx_urb;
232         struct urb *tx_urb;
233         struct urb *irq_urb;
234
235         dma_addr_t intbufferhandle;
236         __u8 *intbuffer;
237         dma_addr_t rxbufferhandle;
238         __u8 *rx_buf;
239
240         
241         struct sk_buff *tx_skb;
242
243         __u8 *firmware_buf;
244         __u8 scratch[KAWETH_SCRATCH_SIZE];
245         __u16 packet_filter_bitmap;
246
247         struct kaweth_ethernet_configuration configuration;
248
249         struct net_device_stats stats;
250 };
251
252
253 /****************************************************************
254  *     kaweth_control
255  ****************************************************************/
256 static int kaweth_control(struct kaweth_device *kaweth,
257                           unsigned int pipe,
258                           __u8 request,
259                           __u8 requesttype,
260                           __u16 value,
261                           __u16 index,
262                           void *data,
263                           __u16 size,
264                           int timeout)
265 {
266         struct usb_ctrlrequest *dr;
267
268         dbg("kaweth_control()");
269
270         if(in_interrupt()) {
271                 dbg("in_interrupt()");
272                 return -EBUSY;
273         }
274
275         dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
276
277         if (!dr) {
278                 dbg("kmalloc() failed");
279                 return -ENOMEM;
280         }
281
282         dr->bRequestType= requesttype;
283         dr->bRequest = request;
284         dr->wValue = cpu_to_le16p(&value);
285         dr->wIndex = cpu_to_le16p(&index);
286         dr->wLength = cpu_to_le16p(&size);
287
288         return kaweth_internal_control_msg(kaweth->dev,
289                                         pipe,
290                                         dr,
291                                         data,
292                                         size,
293                                         timeout);
294 }
295
296 /****************************************************************
297  *     kaweth_read_configuration
298  ****************************************************************/
299 static int kaweth_read_configuration(struct kaweth_device *kaweth)
300 {
301         int retval;
302
303         dbg("Reading kaweth configuration");
304
305         retval = kaweth_control(kaweth,
306                                 usb_rcvctrlpipe(kaweth->dev, 0),
307                                 KAWETH_COMMAND_GET_ETHERNET_DESC,
308                                 USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE,
309                                 0,
310                                 0,
311                                 (void *)&kaweth->configuration,
312                                 sizeof(kaweth->configuration),
313                                 KAWETH_CONTROL_TIMEOUT);
314
315         return retval;
316 }
317
318 /****************************************************************
319  *     kaweth_set_urb_size
320  ****************************************************************/
321 static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size)
322 {
323         int retval;
324
325         dbg("Setting URB size to %d", (unsigned)urb_size);
326
327         retval = kaweth_control(kaweth,
328                                 usb_sndctrlpipe(kaweth->dev, 0),
329                                 KAWETH_COMMAND_SET_URB_SIZE,
330                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
331                                 urb_size,
332                                 0,
333                                 (void *)&kaweth->scratch,
334                                 0,
335                                 KAWETH_CONTROL_TIMEOUT);
336
337         return retval;
338 }
339
340 /****************************************************************
341  *     kaweth_set_sofs_wait
342  ****************************************************************/
343 static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait)
344 {
345         int retval;
346
347         dbg("Set SOFS wait to %d", (unsigned)sofs_wait);
348
349         retval = kaweth_control(kaweth,
350                                 usb_sndctrlpipe(kaweth->dev, 0),
351                                 KAWETH_COMMAND_SET_SOFS_WAIT,
352                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
353                                 sofs_wait,
354                                 0,
355                                 (void *)&kaweth->scratch,
356                                 0,
357                                 KAWETH_CONTROL_TIMEOUT);
358
359         return retval;
360 }
361
362 /****************************************************************
363  *     kaweth_set_receive_filter
364  ****************************************************************/
365 static int kaweth_set_receive_filter(struct kaweth_device *kaweth,
366                                      __u16 receive_filter)
367 {
368         int retval;
369
370         dbg("Set receive filter to %d", (unsigned)receive_filter);
371
372         retval = kaweth_control(kaweth,
373                                 usb_sndctrlpipe(kaweth->dev, 0),
374                                 KAWETH_COMMAND_SET_PACKET_FILTER,
375                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
376                                 receive_filter,
377                                 0,
378                                 (void *)&kaweth->scratch,
379                                 0,
380                                 KAWETH_CONTROL_TIMEOUT);
381
382         return retval;
383 }
384
385 /****************************************************************
386  *     kaweth_download_firmware
387  ****************************************************************/
388 static int kaweth_download_firmware(struct kaweth_device *kaweth,
389                                     __u8 *data,
390                                     __u16 data_len,
391                                     __u8 interrupt,
392                                     __u8 type)
393 {
394         if(data_len > KAWETH_FIRMWARE_BUF_SIZE) {
395                 err("Firmware too big: %d", data_len);
396                 return -ENOSPC;
397         }
398
399         memcpy(kaweth->firmware_buf, data, data_len);
400
401         kaweth->firmware_buf[2] = (data_len & 0xFF) - 7;
402         kaweth->firmware_buf[3] = data_len >> 8;
403         kaweth->firmware_buf[4] = type;
404         kaweth->firmware_buf[5] = interrupt;
405
406         dbg("High: %i, Low:%i", kaweth->firmware_buf[3],
407                    kaweth->firmware_buf[2]);
408
409         dbg("Downloading firmware at %p to kaweth device at %p",
410             data,
411             kaweth);
412         dbg("Firmware length: %d", data_len);
413
414         return kaweth_control(kaweth,
415                               usb_sndctrlpipe(kaweth->dev, 0),
416                               KAWETH_COMMAND_SCAN,
417                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
418                               0,
419                               0,
420                               (void *)kaweth->firmware_buf,
421                               data_len,
422                               KAWETH_CONTROL_TIMEOUT);
423 }
424
425 /****************************************************************
426  *     kaweth_trigger_firmware
427  ****************************************************************/
428 static int kaweth_trigger_firmware(struct kaweth_device *kaweth,
429                                    __u8 interrupt)
430 {
431         kaweth->firmware_buf[0] = 0xB6;
432         kaweth->firmware_buf[1] = 0xC3;
433         kaweth->firmware_buf[2] = 0x01;
434         kaweth->firmware_buf[3] = 0x00;
435         kaweth->firmware_buf[4] = 0x06;
436         kaweth->firmware_buf[5] = interrupt;
437         kaweth->firmware_buf[6] = 0x00;
438         kaweth->firmware_buf[7] = 0x00;
439
440         dbg("Triggering firmware");
441
442         return kaweth_control(kaweth,
443                               usb_sndctrlpipe(kaweth->dev, 0),
444                               KAWETH_COMMAND_SCAN,
445                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
446                               0,
447                               0,
448                               (void *)kaweth->firmware_buf,
449                               8,
450                               KAWETH_CONTROL_TIMEOUT);
451 }
452
453 /****************************************************************
454  *     kaweth_reset
455  ****************************************************************/
456 static int kaweth_reset(struct kaweth_device *kaweth)
457 {
458         int result;
459
460         dbg("kaweth_reset(%p)", kaweth);
461         result = kaweth_control(kaweth,
462                                 usb_sndctrlpipe(kaweth->dev, 0),
463                                 USB_REQ_SET_CONFIGURATION,
464                                 0,
465                                 kaweth->dev->config[0].desc.bConfigurationValue,
466                                 0,
467                                 NULL,
468                                 0,
469                                 KAWETH_CONTROL_TIMEOUT);
470
471         mdelay(10);
472
473         dbg("kaweth_reset() returns %d.",result);
474
475         return result;
476 }
477
478 static void kaweth_usb_receive(struct urb *);
479 static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t);
480
481 /****************************************************************
482         int_callback
483 *****************************************************************/
484
485 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf)
486 {
487         int status;
488
489         status = usb_submit_urb (kaweth->irq_urb, mf);
490         if (unlikely(status == -ENOMEM)) {
491                 kaweth->suspend_lowmem_ctrl = 1;
492                 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
493         } else {
494                 kaweth->suspend_lowmem_ctrl = 0;
495         }
496
497         if (status)
498                 err ("can't resubmit intr, %s-%s, status %d",
499                                 kaweth->dev->bus->bus_name,
500                                 kaweth->dev->devpath, status);
501 }
502
503 static void int_callback(struct urb *u)
504 {
505         struct kaweth_device *kaweth = u->context;
506         int act_state;
507
508         switch (u->status) {
509         case 0:                 /* success */
510                 break;
511         case -ECONNRESET:       /* unlink */
512         case -ENOENT:
513         case -ESHUTDOWN:
514                 return;
515         /* -EPIPE:  should clear the halt */
516         default:                /* error */
517                 goto resubmit;
518         }
519
520         /* we check the link state to report changes */
521         if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) {
522                 if (act_state)
523                         netif_carrier_on(kaweth->net);
524                 else
525                         netif_carrier_off(kaweth->net);
526
527                 kaweth->linkstate = act_state;
528         }
529 resubmit:
530         kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC);
531 }
532
533 static void kaweth_resubmit_tl(struct work_struct *work)
534 {
535         struct kaweth_device *kaweth =
536                 container_of(work, struct kaweth_device, lowmem_work.work);
537
538         if (IS_BLOCKED(kaweth->status))
539                 return;
540
541         if (kaweth->suspend_lowmem_rx)
542                 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
543
544         if (kaweth->suspend_lowmem_ctrl)
545                 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
546 }
547
548
549 /****************************************************************
550  *     kaweth_resubmit_rx_urb
551  ****************************************************************/
552 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth,
553                                                 gfp_t mem_flags)
554 {
555         int result;
556
557         usb_fill_bulk_urb(kaweth->rx_urb,
558                       kaweth->dev,
559                       usb_rcvbulkpipe(kaweth->dev, 1),
560                       kaweth->rx_buf,
561                       KAWETH_BUF_SIZE,
562                       kaweth_usb_receive,
563                       kaweth);
564         kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
565         kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle;
566
567         if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) {
568                 if (result == -ENOMEM) {
569                         kaweth->suspend_lowmem_rx = 1;
570                         schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
571                 }
572                 err("resubmitting rx_urb %d failed", result);
573         } else {
574                 kaweth->suspend_lowmem_rx = 0;
575         }
576
577         return result;
578 }
579
580 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth);
581
582 /****************************************************************
583  *     kaweth_usb_receive
584  ****************************************************************/
585 static void kaweth_usb_receive(struct urb *urb)
586 {
587         struct kaweth_device *kaweth = urb->context;
588         struct net_device *net = kaweth->net;
589
590         int count = urb->actual_length;
591         int count2 = urb->transfer_buffer_length;
592
593         __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf);
594
595         struct sk_buff *skb;
596
597         if(unlikely(urb->status == -ECONNRESET || urb->status == -ESHUTDOWN))
598         /* we are killed - set a flag and wake the disconnect handler */
599         {
600                 kaweth->end = 1;
601                 wake_up(&kaweth->term_wait);
602                 return;
603         }
604
605         spin_lock(&kaweth->device_lock);
606         if (IS_BLOCKED(kaweth->status)) {
607                 spin_unlock(&kaweth->device_lock);
608                 return;
609         }
610         spin_unlock(&kaweth->device_lock);
611
612         if(urb->status && urb->status != -EREMOTEIO && count != 1) {
613                 err("%s RX status: %d count: %d packet_len: %d",
614                            net->name,
615                            urb->status,
616                            count,
617                            (int)pkt_len);
618                 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
619                 return;
620         }
621
622         if(kaweth->net && (count > 2)) {
623                 if(pkt_len > (count - 2)) {
624                         err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count);
625                         err("Packet len & 2047: %x", pkt_len & 2047);
626                         err("Count 2: %x", count2);
627                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
628                         return;
629                 }
630
631                 if(!(skb = dev_alloc_skb(pkt_len+2))) {
632                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
633                         return;
634                 }
635
636                 skb_reserve(skb, 2);    /* Align IP on 16 byte boundaries */
637
638                 eth_copy_and_sum(skb, kaweth->rx_buf + 2, pkt_len, 0);
639
640                 skb_put(skb, pkt_len);
641
642                 skb->protocol = eth_type_trans(skb, net);
643
644                 netif_rx(skb);
645
646                 kaweth->stats.rx_packets++;
647                 kaweth->stats.rx_bytes += pkt_len;
648         }
649
650         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
651 }
652
653 /****************************************************************
654  *     kaweth_open
655  ****************************************************************/
656 static int kaweth_open(struct net_device *net)
657 {
658         struct kaweth_device *kaweth = netdev_priv(net);
659         int res;
660
661         dbg("Opening network device.");
662
663         res = usb_autopm_get_interface(kaweth->intf);
664         if (res) {
665                 err("Interface cannot be resumed.");
666                 return -EIO;
667         }
668         res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL);
669         if (res)
670                 goto err_out;
671
672         usb_fill_int_urb(
673                 kaweth->irq_urb,
674                 kaweth->dev,
675                 usb_rcvintpipe(kaweth->dev, 3),
676                 kaweth->intbuffer,
677                 INTBUFFERSIZE,
678                 int_callback,
679                 kaweth,
680                 250); /* overriding the descriptor */
681         kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle;
682         kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
683
684         res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL);
685         if (res) {
686                 usb_kill_urb(kaweth->rx_urb);
687                 goto err_out;
688         }
689         kaweth->opened = 1;
690
691         netif_start_queue(net);
692
693         kaweth_async_set_rx_mode(kaweth);
694         return 0;
695
696 err_out:
697         usb_autopm_enable(kaweth->intf);
698         return -EIO;
699 }
700
701 /****************************************************************
702  *     kaweth_kill_urbs
703  ****************************************************************/
704 static void kaweth_kill_urbs(struct kaweth_device *kaweth)
705 {
706         usb_kill_urb(kaweth->irq_urb);
707         usb_kill_urb(kaweth->rx_urb);
708         usb_kill_urb(kaweth->tx_urb);
709
710         flush_scheduled_work();
711
712         /* a scheduled work may have resubmitted,
713            we hit them again */
714         usb_kill_urb(kaweth->irq_urb);
715         usb_kill_urb(kaweth->rx_urb);
716 }
717
718 /****************************************************************
719  *     kaweth_close
720  ****************************************************************/
721 static int kaweth_close(struct net_device *net)
722 {
723         struct kaweth_device *kaweth = netdev_priv(net);
724
725         netif_stop_queue(net);
726         kaweth->opened = 0;
727
728         kaweth->status |= KAWETH_STATUS_CLOSING;
729
730         kaweth_kill_urbs(kaweth);
731
732         kaweth->status &= ~KAWETH_STATUS_CLOSING;
733
734         usb_autopm_enable(kaweth->intf);
735
736         return 0;
737 }
738
739 static void kaweth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
740 {
741         struct kaweth_device *kaweth = netdev_priv(dev);
742
743         strlcpy(info->driver, driver_name, sizeof(info->driver));
744         usb_make_path(kaweth->dev, info->bus_info, sizeof (info->bus_info));
745 }
746
747 static u32 kaweth_get_link(struct net_device *dev)
748 {
749         struct kaweth_device *kaweth = netdev_priv(dev);
750
751         return kaweth->linkstate;
752 }
753
754 static struct ethtool_ops ops = {
755         .get_drvinfo    = kaweth_get_drvinfo,
756         .get_link       = kaweth_get_link
757 };
758
759 /****************************************************************
760  *     kaweth_usb_transmit_complete
761  ****************************************************************/
762 static void kaweth_usb_transmit_complete(struct urb *urb)
763 {
764         struct kaweth_device *kaweth = urb->context;
765         struct sk_buff *skb = kaweth->tx_skb;
766
767         if (unlikely(urb->status != 0))
768                 if (urb->status != -ENOENT)
769                         dbg("%s: TX status %d.", kaweth->net->name, urb->status);
770
771         netif_wake_queue(kaweth->net);
772         dev_kfree_skb_irq(skb);
773 }
774
775 /****************************************************************
776  *     kaweth_start_xmit
777  ****************************************************************/
778 static int kaweth_start_xmit(struct sk_buff *skb, struct net_device *net)
779 {
780         struct kaweth_device *kaweth = netdev_priv(net);
781         __le16 *private_header;
782
783         int res;
784
785         spin_lock(&kaweth->device_lock);
786
787         kaweth_async_set_rx_mode(kaweth);
788         netif_stop_queue(net);
789         if (IS_BLOCKED(kaweth->status)) {
790                 goto skip;
791         }
792
793         /* We now decide whether we can put our special header into the sk_buff */
794         if (skb_cloned(skb) || skb_headroom(skb) < 2) {
795                 /* no such luck - we make our own */
796                 struct sk_buff *copied_skb;
797                 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC);
798                 dev_kfree_skb_irq(skb);
799                 skb = copied_skb;
800                 if (!copied_skb) {
801                         kaweth->stats.tx_errors++;
802                         netif_start_queue(net);
803                         spin_unlock(&kaweth->device_lock);
804                         return 0;
805                 }
806         }
807
808         private_header = (__le16 *)__skb_push(skb, 2);
809         *private_header = cpu_to_le16(skb->len-2);
810         kaweth->tx_skb = skb;
811
812         usb_fill_bulk_urb(kaweth->tx_urb,
813                       kaweth->dev,
814                       usb_sndbulkpipe(kaweth->dev, 2),
815                       private_header,
816                       skb->len,
817                       kaweth_usb_transmit_complete,
818                       kaweth);
819         kaweth->end = 0;
820
821         if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
822         {
823                 warn("kaweth failed tx_urb %d", res);
824 skip:
825                 kaweth->stats.tx_errors++;
826
827                 netif_start_queue(net);
828                 dev_kfree_skb_irq(skb);
829         }
830         else
831         {
832                 kaweth->stats.tx_packets++;
833                 kaweth->stats.tx_bytes += skb->len;
834                 net->trans_start = jiffies;
835         }
836
837         spin_unlock(&kaweth->device_lock);
838
839         return 0;
840 }
841
842 /****************************************************************
843  *     kaweth_set_rx_mode
844  ****************************************************************/
845 static void kaweth_set_rx_mode(struct net_device *net)
846 {
847         struct kaweth_device *kaweth = netdev_priv(net);
848
849         __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
850                                      KAWETH_PACKET_FILTER_BROADCAST |
851                                      KAWETH_PACKET_FILTER_MULTICAST;
852
853         dbg("Setting Rx mode to %d", packet_filter_bitmap);
854
855         netif_stop_queue(net);
856
857         if (net->flags & IFF_PROMISC) {
858                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
859         }
860         else if ((net->mc_count) || (net->flags & IFF_ALLMULTI)) {
861                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
862         }
863
864         kaweth->packet_filter_bitmap = packet_filter_bitmap;
865         netif_wake_queue(net);
866 }
867
868 /****************************************************************
869  *     kaweth_async_set_rx_mode
870  ****************************************************************/
871 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
872 {
873         __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
874         kaweth->packet_filter_bitmap = 0;
875         if (packet_filter_bitmap == 0)
876                 return;
877
878         {
879         int result;
880         result = kaweth_control(kaweth,
881                                 usb_sndctrlpipe(kaweth->dev, 0),
882                                 KAWETH_COMMAND_SET_PACKET_FILTER,
883                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
884                                 packet_filter_bitmap,
885                                 0,
886                                 (void *)&kaweth->scratch,
887                                 0,
888                                 KAWETH_CONTROL_TIMEOUT);
889
890         if(result < 0) {
891                 err("Failed to set Rx mode: %d", result);
892         }
893         else {
894                 dbg("Set Rx mode to %d", packet_filter_bitmap);
895         }
896         }
897 }
898
899 /****************************************************************
900  *     kaweth_netdev_stats
901  ****************************************************************/
902 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev)
903 {
904         struct kaweth_device *kaweth = netdev_priv(dev);
905         return &kaweth->stats;
906 }
907
908 /****************************************************************
909  *     kaweth_tx_timeout
910  ****************************************************************/
911 static void kaweth_tx_timeout(struct net_device *net)
912 {
913         struct kaweth_device *kaweth = netdev_priv(net);
914
915         warn("%s: Tx timed out. Resetting.", net->name);
916         kaweth->stats.tx_errors++;
917         net->trans_start = jiffies;
918
919         usb_unlink_urb(kaweth->tx_urb);
920 }
921
922 /****************************************************************
923  *     kaweth_suspend
924  ****************************************************************/
925 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message)
926 {
927         struct kaweth_device *kaweth = usb_get_intfdata(intf);
928         unsigned long flags;
929
930         dbg("Suspending device");
931         spin_lock_irqsave(&kaweth->device_lock, flags);
932         kaweth->status |= KAWETH_STATUS_SUSPENDING;
933         spin_unlock_irqrestore(&kaweth->device_lock, flags);
934
935         kaweth_kill_urbs(kaweth);
936         return 0;
937 }
938
939 /****************************************************************
940  *     kaweth_resume
941  ****************************************************************/
942 static int kaweth_resume(struct usb_interface *intf)
943 {
944         struct kaweth_device *kaweth = usb_get_intfdata(intf);
945         unsigned long flags;
946
947         dbg("Resuming device");
948         spin_lock_irqsave(&kaweth->device_lock, flags);
949         kaweth->status &= ~KAWETH_STATUS_SUSPENDING;
950         spin_unlock_irqrestore(&kaweth->device_lock, flags);
951
952         if (!kaweth->opened)
953                 return 0;
954         kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
955         kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
956
957         return 0;
958 }
959
960 /****************************************************************
961  *     kaweth_probe
962  ****************************************************************/
963 static int kaweth_probe(
964                 struct usb_interface *intf,
965                 const struct usb_device_id *id      /* from id_table */
966         )
967 {
968         struct usb_device *dev = interface_to_usbdev(intf);
969         struct kaweth_device *kaweth;
970         struct net_device *netdev;
971         const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
972         int result = 0;
973
974         dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x",
975                  dev->devnum,
976                  le16_to_cpu(dev->descriptor.idVendor),
977                  le16_to_cpu(dev->descriptor.idProduct),
978                  le16_to_cpu(dev->descriptor.bcdDevice));
979
980         dbg("Device at %p", dev);
981
982         dbg("Descriptor length: %x type: %x",
983                  (int)dev->descriptor.bLength,
984                  (int)dev->descriptor.bDescriptorType);
985
986         netdev = alloc_etherdev(sizeof(*kaweth));
987         if (!netdev)
988                 return -ENOMEM;
989
990         kaweth = netdev_priv(netdev);
991         kaweth->dev = dev;
992         kaweth->net = netdev;
993
994         spin_lock_init(&kaweth->device_lock);
995         init_waitqueue_head(&kaweth->term_wait);
996
997         dbg("Resetting.");
998
999         kaweth_reset(kaweth);
1000
1001         /*
1002          * If high byte of bcdDevice is nonzero, firmware is already
1003          * downloaded. Don't try to do it again, or we'll hang the device.
1004          */
1005
1006         if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) {
1007                 info("Firmware present in device.");
1008         } else {
1009                 /* Download the firmware */
1010                 info("Downloading firmware...");
1011                 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
1012                 if ((result = kaweth_download_firmware(kaweth,
1013                                                       kaweth_new_code,
1014                                                       len_kaweth_new_code,
1015                                                       100,
1016                                                       2)) < 0) {
1017                         err("Error downloading firmware (%d)", result);
1018                         goto err_fw;
1019                 }
1020
1021                 if ((result = kaweth_download_firmware(kaweth,
1022                                                       kaweth_new_code_fix,
1023                                                       len_kaweth_new_code_fix,
1024                                                       100,
1025                                                       3)) < 0) {
1026                         err("Error downloading firmware fix (%d)", result);
1027                         goto err_fw;
1028                 }
1029
1030                 if ((result = kaweth_download_firmware(kaweth,
1031                                                       kaweth_trigger_code,
1032                                                       len_kaweth_trigger_code,
1033                                                       126,
1034                                                       2)) < 0) {
1035                         err("Error downloading trigger code (%d)", result);
1036                         goto err_fw;
1037
1038                 }
1039
1040                 if ((result = kaweth_download_firmware(kaweth,
1041                                                       kaweth_trigger_code_fix,
1042                                                       len_kaweth_trigger_code_fix,
1043                                                       126,
1044                                                       3)) < 0) {
1045                         err("Error downloading trigger code fix (%d)", result);
1046                         goto err_fw;
1047                 }
1048
1049
1050                 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
1051                         err("Error triggering firmware (%d)", result);
1052                         goto err_fw;
1053                 }
1054
1055                 /* Device will now disappear for a moment...  */
1056                 info("Firmware loaded.  I'll be back...");
1057 err_fw:
1058                 free_page((unsigned long)kaweth->firmware_buf);
1059                 free_netdev(netdev);
1060                 return -EIO;
1061         }
1062
1063         result = kaweth_read_configuration(kaweth);
1064
1065         if(result < 0) {
1066                 err("Error reading configuration (%d), no net device created", result);
1067                 goto err_free_netdev;
1068         }
1069
1070         info("Statistics collection: %x", kaweth->configuration.statistics_mask);
1071         info("Multicast filter limit: %x", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
1072         info("MTU: %d", le16_to_cpu(kaweth->configuration.segment_size));
1073         info("Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
1074                  (int)kaweth->configuration.hw_addr[0],
1075                  (int)kaweth->configuration.hw_addr[1],
1076                  (int)kaweth->configuration.hw_addr[2],
1077                  (int)kaweth->configuration.hw_addr[3],
1078                  (int)kaweth->configuration.hw_addr[4],
1079                  (int)kaweth->configuration.hw_addr[5]);
1080
1081         if(!memcmp(&kaweth->configuration.hw_addr,
1082                    &bcast_addr,
1083                    sizeof(bcast_addr))) {
1084                 err("Firmware not functioning properly, no net device created");
1085                 goto err_free_netdev;
1086         }
1087
1088         if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
1089                 dbg("Error setting URB size");
1090                 goto err_free_netdev;
1091         }
1092
1093         if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
1094                 err("Error setting SOFS wait");
1095                 goto err_free_netdev;
1096         }
1097
1098         result = kaweth_set_receive_filter(kaweth,
1099                                            KAWETH_PACKET_FILTER_DIRECTED |
1100                                            KAWETH_PACKET_FILTER_BROADCAST |
1101                                            KAWETH_PACKET_FILTER_MULTICAST);
1102
1103         if(result < 0) {
1104                 err("Error setting receive filter");
1105                 goto err_free_netdev;
1106         }
1107
1108         dbg("Initializing net device.");
1109
1110         kaweth->intf = intf;
1111
1112         kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1113         if (!kaweth->tx_urb)
1114                 goto err_free_netdev;
1115         kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1116         if (!kaweth->rx_urb)
1117                 goto err_only_tx;
1118         kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1119         if (!kaweth->irq_urb)
1120                 goto err_tx_and_rx;
1121
1122         kaweth->intbuffer = usb_buffer_alloc(   kaweth->dev,
1123                                                 INTBUFFERSIZE,
1124                                                 GFP_KERNEL,
1125                                                 &kaweth->intbufferhandle);
1126         if (!kaweth->intbuffer)
1127                 goto err_tx_and_rx_and_irq;
1128         kaweth->rx_buf = usb_buffer_alloc(      kaweth->dev,
1129                                                 KAWETH_BUF_SIZE,
1130                                                 GFP_KERNEL,
1131                                                 &kaweth->rxbufferhandle);
1132         if (!kaweth->rx_buf)
1133                 goto err_all_but_rxbuf;
1134
1135         memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr));
1136         memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr,
1137                sizeof(kaweth->configuration.hw_addr));
1138
1139         netdev->open = kaweth_open;
1140         netdev->stop = kaweth_close;
1141
1142         netdev->watchdog_timeo = KAWETH_TX_TIMEOUT;
1143         netdev->tx_timeout = kaweth_tx_timeout;
1144
1145         netdev->hard_start_xmit = kaweth_start_xmit;
1146         netdev->set_multicast_list = kaweth_set_rx_mode;
1147         netdev->get_stats = kaweth_netdev_stats;
1148         netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size);
1149         SET_ETHTOOL_OPS(netdev, &ops);
1150
1151         /* kaweth is zeroed as part of alloc_netdev */
1152
1153         INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl);
1154
1155         SET_MODULE_OWNER(netdev);
1156
1157         usb_set_intfdata(intf, kaweth);
1158
1159 #if 0
1160 // dma_supported() is deeply broken on almost all architectures
1161         if (dma_supported (&intf->dev, 0xffffffffffffffffULL))
1162                 kaweth->net->features |= NETIF_F_HIGHDMA;
1163 #endif
1164
1165         SET_NETDEV_DEV(netdev, &intf->dev);
1166         if (register_netdev(netdev) != 0) {
1167                 err("Error registering netdev.");
1168                 goto err_intfdata;
1169         }
1170
1171         info("kaweth interface created at %s", kaweth->net->name);
1172
1173         dbg("Kaweth probe returning.");
1174
1175         return 0;
1176
1177 err_intfdata:
1178         usb_set_intfdata(intf, NULL);
1179         usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1180 err_all_but_rxbuf:
1181         usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1182 err_tx_and_rx_and_irq:
1183         usb_free_urb(kaweth->irq_urb);
1184 err_tx_and_rx:
1185         usb_free_urb(kaweth->rx_urb);
1186 err_only_tx:
1187         usb_free_urb(kaweth->tx_urb);
1188 err_free_netdev:
1189         free_netdev(netdev);
1190
1191         return -EIO;
1192 }
1193
1194 /****************************************************************
1195  *     kaweth_disconnect
1196  ****************************************************************/
1197 static void kaweth_disconnect(struct usb_interface *intf)
1198 {
1199         struct kaweth_device *kaweth = usb_get_intfdata(intf);
1200         struct net_device *netdev;
1201
1202         info("Unregistering");
1203
1204         usb_set_intfdata(intf, NULL);
1205         if (!kaweth) {
1206                 warn("unregistering non-existant device");
1207                 return;
1208         }
1209         netdev = kaweth->net;
1210
1211         dbg("Unregistering net device");
1212         unregister_netdev(netdev);
1213
1214         usb_free_urb(kaweth->rx_urb);
1215         usb_free_urb(kaweth->tx_urb);
1216         usb_free_urb(kaweth->irq_urb);
1217
1218         usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1219         usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1220
1221         free_netdev(netdev);
1222 }
1223
1224
1225 // FIXME this completion stuff is a modified clone of
1226 // an OLD version of some stuff in usb.c ...
1227 struct usb_api_data {
1228         wait_queue_head_t wqh;
1229         int done;
1230 };
1231
1232 /*-------------------------------------------------------------------*
1233  * completion handler for compatibility wrappers (sync control/bulk) *
1234  *-------------------------------------------------------------------*/
1235 static void usb_api_blocking_completion(struct urb *urb)
1236 {
1237         struct usb_api_data *awd = (struct usb_api_data *)urb->context;
1238
1239         awd->done=1;
1240         wake_up(&awd->wqh);
1241 }
1242
1243 /*-------------------------------------------------------------------*
1244  *                         COMPATIBILITY STUFF                       *
1245  *-------------------------------------------------------------------*/
1246
1247 // Starts urb and waits for completion or timeout
1248 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
1249 {
1250         struct usb_api_data awd;
1251         int status;
1252
1253         init_waitqueue_head(&awd.wqh);
1254         awd.done = 0;
1255
1256         urb->context = &awd;
1257         status = usb_submit_urb(urb, GFP_NOIO);
1258         if (status) {
1259                 // something went wrong
1260                 usb_free_urb(urb);
1261                 return status;
1262         }
1263
1264         if (!wait_event_timeout(awd.wqh, awd.done, timeout)) {
1265                 // timeout
1266                 warn("usb_control/bulk_msg: timeout");
1267                 usb_kill_urb(urb);  // remove urb safely
1268                 status = -ETIMEDOUT;
1269         }
1270         else {
1271                 status = urb->status;
1272         }
1273
1274         if (actual_length) {
1275                 *actual_length = urb->actual_length;
1276         }
1277
1278         usb_free_urb(urb);
1279         return status;
1280 }
1281
1282 /*-------------------------------------------------------------------*/
1283 // returns status (negative) or length (positive)
1284 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
1285                                        unsigned int pipe,
1286                                        struct usb_ctrlrequest *cmd, void *data,
1287                                        int len, int timeout)
1288 {
1289         struct urb *urb;
1290         int retv;
1291         int length = 0; /* shut up GCC */
1292
1293         urb = usb_alloc_urb(0, GFP_NOIO);
1294         if (!urb)
1295                 return -ENOMEM;
1296
1297         usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data,
1298                          len, usb_api_blocking_completion, NULL);
1299
1300         retv = usb_start_wait_urb(urb, timeout, &length);
1301         if (retv < 0) {
1302                 return retv;
1303         }
1304         else {
1305                 return length;
1306         }
1307 }
1308
1309
1310 /****************************************************************
1311  *     kaweth_init
1312  ****************************************************************/
1313 static int __init kaweth_init(void)
1314 {
1315         dbg("Driver loading");
1316         return usb_register(&kaweth_driver);
1317 }
1318
1319 /****************************************************************
1320  *     kaweth_exit
1321  ****************************************************************/
1322 static void __exit kaweth_exit(void)
1323 {
1324         usb_deregister(&kaweth_driver);
1325 }
1326
1327 module_init(kaweth_init);
1328 module_exit(kaweth_exit);
1329
1330
1331
1332
1333
1334
1335
1336
1337