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