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Merge git://git.infradead.org/battery-2.6
[deliverable/linux.git] / drivers / net / usb / kaweth.c
1 /****************************************************************
2 *
3 * kaweth.c - driver for KL5KUSB101 based USB->Ethernet
4 *
5 * (c) 2000 Interlan Communications
6 * (c) 2000 Stephane Alnet
7 * (C) 2001 Brad Hards
8 * (C) 2002 Oliver Neukum
9 *
10 * Original author: The Zapman <zapman@interlan.net>
11 * Inspired by, and much credit goes to Michael Rothwell
12 * <rothwell@interlan.net> for the test equipment, help, and patience
13 * Based off of (and with thanks to) Petko Manolov's pegaus.c driver.
14 * Also many thanks to Joel Silverman and Ed Surprenant at Kawasaki
15 * for providing the firmware and driver resources.
16 *
17 * This program is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU General Public License as
19 * published by the Free Software Foundation; either version 2, or
20 * (at your option) any later version.
21 *
22 * This program is distributed in the hope that it will be useful,
23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 * GNU General Public License for more details.
26 *
27 * You should have received a copy of the GNU General Public License
28 * along with this program; if not, write to the Free Software Foundation,
29 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
30 *
31 ****************************************************************/
32
33 /* TODO:
34 * 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 * Reduce arbitrary timeouts
40 * Smart multicast support
41 * Temporary MAC change support
42 * Tunable SOFs parameter - ioctl()?
43 * Ethernet stats collection
44 * Code formatting improvements
45 */
46
47 #include <linux/module.h>
48 #include <linux/slab.h>
49 #include <linux/string.h>
50 #include <linux/init.h>
51 #include <linux/delay.h>
52 #include <linux/netdevice.h>
53 #include <linux/etherdevice.h>
54 #include <linux/usb.h>
55 #include <linux/types.h>
56 #include <linux/ethtool.h>
57 #include <linux/dma-mapping.h>
58 #include <linux/wait.h>
59 #include <linux/firmware.h>
60 #include <asm/uaccess.h>
61 #include <asm/byteorder.h>
62
63 #undef DEBUG
64
65 #define KAWETH_MTU 1514
66 #define KAWETH_BUF_SIZE 1664
67 #define KAWETH_TX_TIMEOUT (5 * HZ)
68 #define KAWETH_SCRATCH_SIZE 32
69 #define KAWETH_FIRMWARE_BUF_SIZE 4096
70 #define KAWETH_CONTROL_TIMEOUT (30000)
71
72 #define KAWETH_STATUS_BROKEN 0x0000001
73 #define KAWETH_STATUS_CLOSING 0x0000002
74 #define KAWETH_STATUS_SUSPENDING 0x0000004
75
76 #define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING)
77
78 #define KAWETH_PACKET_FILTER_PROMISCUOUS 0x01
79 #define KAWETH_PACKET_FILTER_ALL_MULTICAST 0x02
80 #define KAWETH_PACKET_FILTER_DIRECTED 0x04
81 #define KAWETH_PACKET_FILTER_BROADCAST 0x08
82 #define KAWETH_PACKET_FILTER_MULTICAST 0x10
83
84 /* Table 7 */
85 #define KAWETH_COMMAND_GET_ETHERNET_DESC 0x00
86 #define KAWETH_COMMAND_MULTICAST_FILTERS 0x01
87 #define KAWETH_COMMAND_SET_PACKET_FILTER 0x02
88 #define KAWETH_COMMAND_STATISTICS 0x03
89 #define KAWETH_COMMAND_SET_TEMP_MAC 0x06
90 #define KAWETH_COMMAND_GET_TEMP_MAC 0x07
91 #define KAWETH_COMMAND_SET_URB_SIZE 0x08
92 #define KAWETH_COMMAND_SET_SOFS_WAIT 0x09
93 #define KAWETH_COMMAND_SCAN 0xFF
94
95 #define KAWETH_SOFS_TO_WAIT 0x05
96
97 #define INTBUFFERSIZE 4
98
99 #define STATE_OFFSET 0
100 #define STATE_MASK 0x40
101 #define STATE_SHIFT 5
102
103 #define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED)
104
105
106 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>");
107 MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver");
108 MODULE_LICENSE("GPL");
109 MODULE_FIRMWARE("kaweth/new_code.bin");
110 MODULE_FIRMWARE("kaweth/new_code_fix.bin");
111 MODULE_FIRMWARE("kaweth/trigger_code.bin");
112 MODULE_FIRMWARE("kaweth/trigger_code_fix.bin");
113
114 static const char driver_name[] = "kaweth";
115
116 static int kaweth_probe(
117 struct usb_interface *intf,
118 const struct usb_device_id *id /* from id_table */
119 );
120 static void kaweth_disconnect(struct usb_interface *intf);
121 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
122 unsigned int pipe,
123 struct usb_ctrlrequest *cmd, void *data,
124 int len, int timeout);
125 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message);
126 static int kaweth_resume(struct usb_interface *intf);
127
128 /****************************************************************
129 * usb_device_id
130 ****************************************************************/
131 static struct usb_device_id usb_klsi_table[] = {
132 { USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */
133 { USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */
134 { USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */
135 { USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */
136 { USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */
137 { USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */
138 { USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */
139 { USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */
140 { USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */
141 { USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */
142 { USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */
143 { USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */
144 { USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */
145 { USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */
146 { USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */
147 { USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */
148 { USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */
149 { USB_DEVICE(0x0846, 0x1001) }, /* NetGear EA-101 */
150 { USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */
151 { USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */
152 { USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */
153 { USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */
154 { USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */
155 { USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */
156 { USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */
157 { USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */
158 { USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */
159 { USB_DEVICE(0x1485, 0x0001) }, /* Silicom U2E */
160 { USB_DEVICE(0x1485, 0x0002) }, /* Psion Dacom Gold Port Ethernet */
161 { USB_DEVICE(0x1645, 0x0005) }, /* Entrega E45 */
162 { USB_DEVICE(0x1645, 0x0008) }, /* Entrega USB Ethernet Adapter */
163 { USB_DEVICE(0x1645, 0x8005) }, /* PortGear Ethernet Adapter */
164 { USB_DEVICE(0x1668, 0x0323) }, /* Actiontec USB Ethernet */
165 { USB_DEVICE(0x2001, 0x4000) }, /* D-link DSB-650C */
166 {} /* Null terminator */
167 };
168
169 MODULE_DEVICE_TABLE (usb, usb_klsi_table);
170
171 /****************************************************************
172 * kaweth_driver
173 ****************************************************************/
174 static struct usb_driver kaweth_driver = {
175 .name = driver_name,
176 .probe = kaweth_probe,
177 .disconnect = kaweth_disconnect,
178 .suspend = kaweth_suspend,
179 .resume = kaweth_resume,
180 .id_table = usb_klsi_table,
181 .supports_autosuspend = 1,
182 };
183
184 typedef __u8 eth_addr_t[6];
185
186 /****************************************************************
187 * usb_eth_dev
188 ****************************************************************/
189 struct usb_eth_dev {
190 char *name;
191 __u16 vendor;
192 __u16 device;
193 void *pdata;
194 };
195
196 /****************************************************************
197 * kaweth_ethernet_configuration
198 * Refer Table 8
199 ****************************************************************/
200 struct kaweth_ethernet_configuration
201 {
202 __u8 size;
203 __u8 reserved1;
204 __u8 reserved2;
205 eth_addr_t hw_addr;
206 __u32 statistics_mask;
207 __le16 segment_size;
208 __u16 max_multicast_filters;
209 __u8 reserved3;
210 } __attribute__ ((packed));
211
212 /****************************************************************
213 * kaweth_device
214 ****************************************************************/
215 struct kaweth_device
216 {
217 spinlock_t device_lock;
218
219 __u32 status;
220 int end;
221 int suspend_lowmem_rx;
222 int suspend_lowmem_ctrl;
223 int linkstate;
224 int opened;
225 struct delayed_work lowmem_work;
226
227 struct usb_device *dev;
228 struct usb_interface *intf;
229 struct net_device *net;
230 wait_queue_head_t term_wait;
231
232 struct urb *rx_urb;
233 struct urb *tx_urb;
234 struct urb *irq_urb;
235
236 dma_addr_t intbufferhandle;
237 __u8 *intbuffer;
238 dma_addr_t rxbufferhandle;
239 __u8 *rx_buf;
240
241
242 struct sk_buff *tx_skb;
243
244 __u8 *firmware_buf;
245 __u8 scratch[KAWETH_SCRATCH_SIZE];
246 __u16 packet_filter_bitmap;
247
248 struct kaweth_ethernet_configuration configuration;
249
250 struct net_device_stats stats;
251 };
252
253 /****************************************************************
254 * 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_le16(value);
285 dr->wIndex = cpu_to_le16(index);
286 dr->wLength = cpu_to_le16(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 const char *fwname,
390 __u8 interrupt,
391 __u8 type)
392 {
393 const struct firmware *fw;
394 int data_len;
395 int ret;
396
397 ret = request_firmware(&fw, fwname, &kaweth->dev->dev);
398 if (ret) {
399 err("Firmware request failed\n");
400 return ret;
401 }
402
403 if (fw->size > KAWETH_FIRMWARE_BUF_SIZE) {
404 err("Firmware too big: %zu", fw->size);
405 return -ENOSPC;
406 }
407 data_len = fw->size;
408 memcpy(kaweth->firmware_buf, fw->data, fw->size);
409
410 release_firmware(fw);
411
412 kaweth->firmware_buf[2] = (data_len & 0xFF) - 7;
413 kaweth->firmware_buf[3] = data_len >> 8;
414 kaweth->firmware_buf[4] = type;
415 kaweth->firmware_buf[5] = interrupt;
416
417 dbg("High: %i, Low:%i", kaweth->firmware_buf[3],
418 kaweth->firmware_buf[2]);
419
420 dbg("Downloading firmware at %p to kaweth device at %p",
421 fw->data, kaweth);
422 dbg("Firmware length: %d", data_len);
423
424 return kaweth_control(kaweth,
425 usb_sndctrlpipe(kaweth->dev, 0),
426 KAWETH_COMMAND_SCAN,
427 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
428 0,
429 0,
430 (void *)kaweth->firmware_buf,
431 data_len,
432 KAWETH_CONTROL_TIMEOUT);
433 }
434
435 /****************************************************************
436 * kaweth_trigger_firmware
437 ****************************************************************/
438 static int kaweth_trigger_firmware(struct kaweth_device *kaweth,
439 __u8 interrupt)
440 {
441 kaweth->firmware_buf[0] = 0xB6;
442 kaweth->firmware_buf[1] = 0xC3;
443 kaweth->firmware_buf[2] = 0x01;
444 kaweth->firmware_buf[3] = 0x00;
445 kaweth->firmware_buf[4] = 0x06;
446 kaweth->firmware_buf[5] = interrupt;
447 kaweth->firmware_buf[6] = 0x00;
448 kaweth->firmware_buf[7] = 0x00;
449
450 dbg("Triggering firmware");
451
452 return kaweth_control(kaweth,
453 usb_sndctrlpipe(kaweth->dev, 0),
454 KAWETH_COMMAND_SCAN,
455 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
456 0,
457 0,
458 (void *)kaweth->firmware_buf,
459 8,
460 KAWETH_CONTROL_TIMEOUT);
461 }
462
463 /****************************************************************
464 * kaweth_reset
465 ****************************************************************/
466 static int kaweth_reset(struct kaweth_device *kaweth)
467 {
468 int result;
469
470 dbg("kaweth_reset(%p)", kaweth);
471 result = kaweth_control(kaweth,
472 usb_sndctrlpipe(kaweth->dev, 0),
473 USB_REQ_SET_CONFIGURATION,
474 0,
475 kaweth->dev->config[0].desc.bConfigurationValue,
476 0,
477 NULL,
478 0,
479 KAWETH_CONTROL_TIMEOUT);
480
481 mdelay(10);
482
483 dbg("kaweth_reset() returns %d.",result);
484
485 return result;
486 }
487
488 static void kaweth_usb_receive(struct urb *);
489 static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t);
490
491 /****************************************************************
492 int_callback
493 *****************************************************************/
494
495 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf)
496 {
497 int status;
498
499 status = usb_submit_urb (kaweth->irq_urb, mf);
500 if (unlikely(status == -ENOMEM)) {
501 kaweth->suspend_lowmem_ctrl = 1;
502 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
503 } else {
504 kaweth->suspend_lowmem_ctrl = 0;
505 }
506
507 if (status)
508 err ("can't resubmit intr, %s-%s, status %d",
509 kaweth->dev->bus->bus_name,
510 kaweth->dev->devpath, status);
511 }
512
513 static void int_callback(struct urb *u)
514 {
515 struct kaweth_device *kaweth = u->context;
516 int act_state;
517 int status = u->status;
518
519 switch (status) {
520 case 0: /* success */
521 break;
522 case -ECONNRESET: /* unlink */
523 case -ENOENT:
524 case -ESHUTDOWN:
525 return;
526 /* -EPIPE: should clear the halt */
527 default: /* error */
528 goto resubmit;
529 }
530
531 /* we check the link state to report changes */
532 if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) {
533 if (act_state)
534 netif_carrier_on(kaweth->net);
535 else
536 netif_carrier_off(kaweth->net);
537
538 kaweth->linkstate = act_state;
539 }
540 resubmit:
541 kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC);
542 }
543
544 static void kaweth_resubmit_tl(struct work_struct *work)
545 {
546 struct kaweth_device *kaweth =
547 container_of(work, struct kaweth_device, lowmem_work.work);
548
549 if (IS_BLOCKED(kaweth->status))
550 return;
551
552 if (kaweth->suspend_lowmem_rx)
553 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
554
555 if (kaweth->suspend_lowmem_ctrl)
556 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
557 }
558
559
560 /****************************************************************
561 * kaweth_resubmit_rx_urb
562 ****************************************************************/
563 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth,
564 gfp_t mem_flags)
565 {
566 int result;
567
568 usb_fill_bulk_urb(kaweth->rx_urb,
569 kaweth->dev,
570 usb_rcvbulkpipe(kaweth->dev, 1),
571 kaweth->rx_buf,
572 KAWETH_BUF_SIZE,
573 kaweth_usb_receive,
574 kaweth);
575 kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
576 kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle;
577
578 if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) {
579 if (result == -ENOMEM) {
580 kaweth->suspend_lowmem_rx = 1;
581 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
582 }
583 err("resubmitting rx_urb %d failed", result);
584 } else {
585 kaweth->suspend_lowmem_rx = 0;
586 }
587
588 return result;
589 }
590
591 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth);
592
593 /****************************************************************
594 * kaweth_usb_receive
595 ****************************************************************/
596 static void kaweth_usb_receive(struct urb *urb)
597 {
598 struct kaweth_device *kaweth = urb->context;
599 struct net_device *net = kaweth->net;
600 int status = urb->status;
601
602 int count = urb->actual_length;
603 int count2 = urb->transfer_buffer_length;
604
605 __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf);
606
607 struct sk_buff *skb;
608
609 if(unlikely(status == -ECONNRESET || status == -ESHUTDOWN))
610 /* we are killed - set a flag and wake the disconnect handler */
611 {
612 kaweth->end = 1;
613 wake_up(&kaweth->term_wait);
614 return;
615 }
616
617 spin_lock(&kaweth->device_lock);
618 if (IS_BLOCKED(kaweth->status)) {
619 spin_unlock(&kaweth->device_lock);
620 return;
621 }
622 spin_unlock(&kaweth->device_lock);
623
624 if(status && status != -EREMOTEIO && count != 1) {
625 err("%s RX status: %d count: %d packet_len: %d",
626 net->name,
627 status,
628 count,
629 (int)pkt_len);
630 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
631 return;
632 }
633
634 if(kaweth->net && (count > 2)) {
635 if(pkt_len > (count - 2)) {
636 err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count);
637 err("Packet len & 2047: %x", pkt_len & 2047);
638 err("Count 2: %x", count2);
639 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
640 return;
641 }
642
643 if(!(skb = dev_alloc_skb(pkt_len+2))) {
644 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
645 return;
646 }
647
648 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
649
650 skb_copy_to_linear_data(skb, kaweth->rx_buf + 2, pkt_len);
651
652 skb_put(skb, pkt_len);
653
654 skb->protocol = eth_type_trans(skb, net);
655
656 netif_rx(skb);
657
658 kaweth->stats.rx_packets++;
659 kaweth->stats.rx_bytes += pkt_len;
660 }
661
662 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
663 }
664
665 /****************************************************************
666 * kaweth_open
667 ****************************************************************/
668 static int kaweth_open(struct net_device *net)
669 {
670 struct kaweth_device *kaweth = netdev_priv(net);
671 int res;
672
673 dbg("Opening network device.");
674
675 res = usb_autopm_get_interface(kaweth->intf);
676 if (res) {
677 err("Interface cannot be resumed.");
678 return -EIO;
679 }
680 res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL);
681 if (res)
682 goto err_out;
683
684 usb_fill_int_urb(
685 kaweth->irq_urb,
686 kaweth->dev,
687 usb_rcvintpipe(kaweth->dev, 3),
688 kaweth->intbuffer,
689 INTBUFFERSIZE,
690 int_callback,
691 kaweth,
692 250); /* overriding the descriptor */
693 kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle;
694 kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
695
696 res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL);
697 if (res) {
698 usb_kill_urb(kaweth->rx_urb);
699 goto err_out;
700 }
701 kaweth->opened = 1;
702
703 netif_start_queue(net);
704
705 kaweth_async_set_rx_mode(kaweth);
706 return 0;
707
708 err_out:
709 usb_autopm_enable(kaweth->intf);
710 return -EIO;
711 }
712
713 /****************************************************************
714 * kaweth_kill_urbs
715 ****************************************************************/
716 static void kaweth_kill_urbs(struct kaweth_device *kaweth)
717 {
718 usb_kill_urb(kaweth->irq_urb);
719 usb_kill_urb(kaweth->rx_urb);
720 usb_kill_urb(kaweth->tx_urb);
721
722 cancel_delayed_work_sync(&kaweth->lowmem_work);
723
724 /* a scheduled work may have resubmitted,
725 we hit them again */
726 usb_kill_urb(kaweth->irq_urb);
727 usb_kill_urb(kaweth->rx_urb);
728 }
729
730 /****************************************************************
731 * kaweth_close
732 ****************************************************************/
733 static int kaweth_close(struct net_device *net)
734 {
735 struct kaweth_device *kaweth = netdev_priv(net);
736
737 netif_stop_queue(net);
738 kaweth->opened = 0;
739
740 kaweth->status |= KAWETH_STATUS_CLOSING;
741
742 kaweth_kill_urbs(kaweth);
743
744 kaweth->status &= ~KAWETH_STATUS_CLOSING;
745
746 usb_autopm_enable(kaweth->intf);
747
748 return 0;
749 }
750
751 static void kaweth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
752 {
753 struct kaweth_device *kaweth = netdev_priv(dev);
754
755 strlcpy(info->driver, driver_name, sizeof(info->driver));
756 usb_make_path(kaweth->dev, info->bus_info, sizeof (info->bus_info));
757 }
758
759 static u32 kaweth_get_link(struct net_device *dev)
760 {
761 struct kaweth_device *kaweth = netdev_priv(dev);
762
763 return kaweth->linkstate;
764 }
765
766 static struct ethtool_ops ops = {
767 .get_drvinfo = kaweth_get_drvinfo,
768 .get_link = kaweth_get_link
769 };
770
771 /****************************************************************
772 * kaweth_usb_transmit_complete
773 ****************************************************************/
774 static void kaweth_usb_transmit_complete(struct urb *urb)
775 {
776 struct kaweth_device *kaweth = urb->context;
777 struct sk_buff *skb = kaweth->tx_skb;
778 int status = urb->status;
779
780 if (unlikely(status != 0))
781 if (status != -ENOENT)
782 dbg("%s: TX status %d.", kaweth->net->name, status);
783
784 netif_wake_queue(kaweth->net);
785 dev_kfree_skb_irq(skb);
786 }
787
788 /****************************************************************
789 * kaweth_start_xmit
790 ****************************************************************/
791 static int kaweth_start_xmit(struct sk_buff *skb, struct net_device *net)
792 {
793 struct kaweth_device *kaweth = netdev_priv(net);
794 __le16 *private_header;
795
796 int res;
797
798 spin_lock_irq(&kaweth->device_lock);
799
800 kaweth_async_set_rx_mode(kaweth);
801 netif_stop_queue(net);
802 if (IS_BLOCKED(kaweth->status)) {
803 goto skip;
804 }
805
806 /* We now decide whether we can put our special header into the sk_buff */
807 if (skb_cloned(skb) || skb_headroom(skb) < 2) {
808 /* no such luck - we make our own */
809 struct sk_buff *copied_skb;
810 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC);
811 dev_kfree_skb_irq(skb);
812 skb = copied_skb;
813 if (!copied_skb) {
814 kaweth->stats.tx_errors++;
815 netif_start_queue(net);
816 spin_unlock_irq(&kaweth->device_lock);
817 return 0;
818 }
819 }
820
821 private_header = (__le16 *)__skb_push(skb, 2);
822 *private_header = cpu_to_le16(skb->len-2);
823 kaweth->tx_skb = skb;
824
825 usb_fill_bulk_urb(kaweth->tx_urb,
826 kaweth->dev,
827 usb_sndbulkpipe(kaweth->dev, 2),
828 private_header,
829 skb->len,
830 kaweth_usb_transmit_complete,
831 kaweth);
832 kaweth->end = 0;
833
834 if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
835 {
836 dev_warn(&net->dev, "kaweth failed tx_urb %d\n", res);
837 skip:
838 kaweth->stats.tx_errors++;
839
840 netif_start_queue(net);
841 dev_kfree_skb_irq(skb);
842 }
843 else
844 {
845 kaweth->stats.tx_packets++;
846 kaweth->stats.tx_bytes += skb->len;
847 net->trans_start = jiffies;
848 }
849
850 spin_unlock_irq(&kaweth->device_lock);
851
852 return 0;
853 }
854
855 /****************************************************************
856 * kaweth_set_rx_mode
857 ****************************************************************/
858 static void kaweth_set_rx_mode(struct net_device *net)
859 {
860 struct kaweth_device *kaweth = netdev_priv(net);
861
862 __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
863 KAWETH_PACKET_FILTER_BROADCAST |
864 KAWETH_PACKET_FILTER_MULTICAST;
865
866 dbg("Setting Rx mode to %d", packet_filter_bitmap);
867
868 netif_stop_queue(net);
869
870 if (net->flags & IFF_PROMISC) {
871 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
872 }
873 else if ((net->mc_count) || (net->flags & IFF_ALLMULTI)) {
874 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
875 }
876
877 kaweth->packet_filter_bitmap = packet_filter_bitmap;
878 netif_wake_queue(net);
879 }
880
881 /****************************************************************
882 * kaweth_async_set_rx_mode
883 ****************************************************************/
884 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
885 {
886 __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
887 kaweth->packet_filter_bitmap = 0;
888 if (packet_filter_bitmap == 0)
889 return;
890
891 {
892 int result;
893 result = kaweth_control(kaweth,
894 usb_sndctrlpipe(kaweth->dev, 0),
895 KAWETH_COMMAND_SET_PACKET_FILTER,
896 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
897 packet_filter_bitmap,
898 0,
899 (void *)&kaweth->scratch,
900 0,
901 KAWETH_CONTROL_TIMEOUT);
902
903 if(result < 0) {
904 err("Failed to set Rx mode: %d", result);
905 }
906 else {
907 dbg("Set Rx mode to %d", packet_filter_bitmap);
908 }
909 }
910 }
911
912 /****************************************************************
913 * kaweth_netdev_stats
914 ****************************************************************/
915 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev)
916 {
917 struct kaweth_device *kaweth = netdev_priv(dev);
918 return &kaweth->stats;
919 }
920
921 /****************************************************************
922 * kaweth_tx_timeout
923 ****************************************************************/
924 static void kaweth_tx_timeout(struct net_device *net)
925 {
926 struct kaweth_device *kaweth = netdev_priv(net);
927
928 dev_warn(&net->dev, "%s: Tx timed out. Resetting.\n", net->name);
929 kaweth->stats.tx_errors++;
930 net->trans_start = jiffies;
931
932 usb_unlink_urb(kaweth->tx_urb);
933 }
934
935 /****************************************************************
936 * kaweth_suspend
937 ****************************************************************/
938 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message)
939 {
940 struct kaweth_device *kaweth = usb_get_intfdata(intf);
941 unsigned long flags;
942
943 dbg("Suspending device");
944 spin_lock_irqsave(&kaweth->device_lock, flags);
945 kaweth->status |= KAWETH_STATUS_SUSPENDING;
946 spin_unlock_irqrestore(&kaweth->device_lock, flags);
947
948 kaweth_kill_urbs(kaweth);
949 return 0;
950 }
951
952 /****************************************************************
953 * kaweth_resume
954 ****************************************************************/
955 static int kaweth_resume(struct usb_interface *intf)
956 {
957 struct kaweth_device *kaweth = usb_get_intfdata(intf);
958 unsigned long flags;
959
960 dbg("Resuming device");
961 spin_lock_irqsave(&kaweth->device_lock, flags);
962 kaweth->status &= ~KAWETH_STATUS_SUSPENDING;
963 spin_unlock_irqrestore(&kaweth->device_lock, flags);
964
965 if (!kaweth->opened)
966 return 0;
967 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
968 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
969
970 return 0;
971 }
972
973 /****************************************************************
974 * kaweth_probe
975 ****************************************************************/
976
977
978 static const struct net_device_ops kaweth_netdev_ops = {
979 .ndo_open = kaweth_open,
980 .ndo_stop = kaweth_close,
981 .ndo_start_xmit = kaweth_start_xmit,
982 .ndo_tx_timeout = kaweth_tx_timeout,
983 .ndo_set_multicast_list = kaweth_set_rx_mode,
984 .ndo_get_stats = kaweth_netdev_stats,
985 };
986
987 static int kaweth_probe(
988 struct usb_interface *intf,
989 const struct usb_device_id *id /* from id_table */
990 )
991 {
992 struct usb_device *dev = interface_to_usbdev(intf);
993 struct kaweth_device *kaweth;
994 struct net_device *netdev;
995 const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
996 int result = 0;
997
998 dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x",
999 dev->devnum,
1000 le16_to_cpu(dev->descriptor.idVendor),
1001 le16_to_cpu(dev->descriptor.idProduct),
1002 le16_to_cpu(dev->descriptor.bcdDevice));
1003
1004 dbg("Device at %p", dev);
1005
1006 dbg("Descriptor length: %x type: %x",
1007 (int)dev->descriptor.bLength,
1008 (int)dev->descriptor.bDescriptorType);
1009
1010 netdev = alloc_etherdev(sizeof(*kaweth));
1011 if (!netdev)
1012 return -ENOMEM;
1013
1014 kaweth = netdev_priv(netdev);
1015 kaweth->dev = dev;
1016 kaweth->net = netdev;
1017
1018 spin_lock_init(&kaweth->device_lock);
1019 init_waitqueue_head(&kaweth->term_wait);
1020
1021 dbg("Resetting.");
1022
1023 kaweth_reset(kaweth);
1024
1025 /*
1026 * If high byte of bcdDevice is nonzero, firmware is already
1027 * downloaded. Don't try to do it again, or we'll hang the device.
1028 */
1029
1030 if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) {
1031 dev_info(&intf->dev, "Firmware present in device.\n");
1032 } else {
1033 /* Download the firmware */
1034 dev_info(&intf->dev, "Downloading firmware...\n");
1035 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
1036 if ((result = kaweth_download_firmware(kaweth,
1037 "kaweth/new_code.bin",
1038 100,
1039 2)) < 0) {
1040 err("Error downloading firmware (%d)", result);
1041 goto err_fw;
1042 }
1043
1044 if ((result = kaweth_download_firmware(kaweth,
1045 "kaweth/new_code_fix.bin",
1046 100,
1047 3)) < 0) {
1048 err("Error downloading firmware fix (%d)", result);
1049 goto err_fw;
1050 }
1051
1052 if ((result = kaweth_download_firmware(kaweth,
1053 "kaweth/trigger_code.bin",
1054 126,
1055 2)) < 0) {
1056 err("Error downloading trigger code (%d)", result);
1057 goto err_fw;
1058
1059 }
1060
1061 if ((result = kaweth_download_firmware(kaweth,
1062 "kaweth/trigger_code_fix.bin",
1063 126,
1064 3)) < 0) {
1065 err("Error downloading trigger code fix (%d)", result);
1066 goto err_fw;
1067 }
1068
1069
1070 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
1071 err("Error triggering firmware (%d)", result);
1072 goto err_fw;
1073 }
1074
1075 /* Device will now disappear for a moment... */
1076 dev_info(&intf->dev, "Firmware loaded. I'll be back...\n");
1077 err_fw:
1078 free_page((unsigned long)kaweth->firmware_buf);
1079 free_netdev(netdev);
1080 return -EIO;
1081 }
1082
1083 result = kaweth_read_configuration(kaweth);
1084
1085 if(result < 0) {
1086 err("Error reading configuration (%d), no net device created", result);
1087 goto err_free_netdev;
1088 }
1089
1090 dev_info(&intf->dev, "Statistics collection: %x\n", kaweth->configuration.statistics_mask);
1091 dev_info(&intf->dev, "Multicast filter limit: %x\n", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
1092 dev_info(&intf->dev, "MTU: %d\n", le16_to_cpu(kaweth->configuration.segment_size));
1093 dev_info(&intf->dev, "Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x\n",
1094 (int)kaweth->configuration.hw_addr[0],
1095 (int)kaweth->configuration.hw_addr[1],
1096 (int)kaweth->configuration.hw_addr[2],
1097 (int)kaweth->configuration.hw_addr[3],
1098 (int)kaweth->configuration.hw_addr[4],
1099 (int)kaweth->configuration.hw_addr[5]);
1100
1101 if(!memcmp(&kaweth->configuration.hw_addr,
1102 &bcast_addr,
1103 sizeof(bcast_addr))) {
1104 err("Firmware not functioning properly, no net device created");
1105 goto err_free_netdev;
1106 }
1107
1108 if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
1109 dbg("Error setting URB size");
1110 goto err_free_netdev;
1111 }
1112
1113 if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
1114 err("Error setting SOFS wait");
1115 goto err_free_netdev;
1116 }
1117
1118 result = kaweth_set_receive_filter(kaweth,
1119 KAWETH_PACKET_FILTER_DIRECTED |
1120 KAWETH_PACKET_FILTER_BROADCAST |
1121 KAWETH_PACKET_FILTER_MULTICAST);
1122
1123 if(result < 0) {
1124 err("Error setting receive filter");
1125 goto err_free_netdev;
1126 }
1127
1128 dbg("Initializing net device.");
1129
1130 kaweth->intf = intf;
1131
1132 kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1133 if (!kaweth->tx_urb)
1134 goto err_free_netdev;
1135 kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1136 if (!kaweth->rx_urb)
1137 goto err_only_tx;
1138 kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1139 if (!kaweth->irq_urb)
1140 goto err_tx_and_rx;
1141
1142 kaweth->intbuffer = usb_buffer_alloc( kaweth->dev,
1143 INTBUFFERSIZE,
1144 GFP_KERNEL,
1145 &kaweth->intbufferhandle);
1146 if (!kaweth->intbuffer)
1147 goto err_tx_and_rx_and_irq;
1148 kaweth->rx_buf = usb_buffer_alloc( kaweth->dev,
1149 KAWETH_BUF_SIZE,
1150 GFP_KERNEL,
1151 &kaweth->rxbufferhandle);
1152 if (!kaweth->rx_buf)
1153 goto err_all_but_rxbuf;
1154
1155 memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr));
1156 memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr,
1157 sizeof(kaweth->configuration.hw_addr));
1158
1159 netdev->netdev_ops = &kaweth_netdev_ops;
1160 netdev->watchdog_timeo = KAWETH_TX_TIMEOUT;
1161 netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size);
1162 SET_ETHTOOL_OPS(netdev, &ops);
1163
1164 /* kaweth is zeroed as part of alloc_netdev */
1165 INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl);
1166 usb_set_intfdata(intf, kaweth);
1167
1168 #if 0
1169 // dma_supported() is deeply broken on almost all architectures
1170 if (dma_supported (&intf->dev, 0xffffffffffffffffULL))
1171 kaweth->net->features |= NETIF_F_HIGHDMA;
1172 #endif
1173
1174 SET_NETDEV_DEV(netdev, &intf->dev);
1175 if (register_netdev(netdev) != 0) {
1176 err("Error registering netdev.");
1177 goto err_intfdata;
1178 }
1179
1180 dev_info(&intf->dev, "kaweth interface created at %s\n",
1181 kaweth->net->name);
1182
1183 dbg("Kaweth probe returning.");
1184
1185 return 0;
1186
1187 err_intfdata:
1188 usb_set_intfdata(intf, NULL);
1189 usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1190 err_all_but_rxbuf:
1191 usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1192 err_tx_and_rx_and_irq:
1193 usb_free_urb(kaweth->irq_urb);
1194 err_tx_and_rx:
1195 usb_free_urb(kaweth->rx_urb);
1196 err_only_tx:
1197 usb_free_urb(kaweth->tx_urb);
1198 err_free_netdev:
1199 free_netdev(netdev);
1200
1201 return -EIO;
1202 }
1203
1204 /****************************************************************
1205 * kaweth_disconnect
1206 ****************************************************************/
1207 static void kaweth_disconnect(struct usb_interface *intf)
1208 {
1209 struct kaweth_device *kaweth = usb_get_intfdata(intf);
1210 struct net_device *netdev;
1211
1212 dev_info(&intf->dev, "Unregistering\n");
1213
1214 usb_set_intfdata(intf, NULL);
1215 if (!kaweth) {
1216 dev_warn(&intf->dev, "unregistering non-existant device\n");
1217 return;
1218 }
1219 netdev = kaweth->net;
1220
1221 dbg("Unregistering net device");
1222 unregister_netdev(netdev);
1223
1224 usb_free_urb(kaweth->rx_urb);
1225 usb_free_urb(kaweth->tx_urb);
1226 usb_free_urb(kaweth->irq_urb);
1227
1228 usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1229 usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1230
1231 free_netdev(netdev);
1232 }
1233
1234
1235 // FIXME this completion stuff is a modified clone of
1236 // an OLD version of some stuff in usb.c ...
1237 struct usb_api_data {
1238 wait_queue_head_t wqh;
1239 int done;
1240 };
1241
1242 /*-------------------------------------------------------------------*
1243 * completion handler for compatibility wrappers (sync control/bulk) *
1244 *-------------------------------------------------------------------*/
1245 static void usb_api_blocking_completion(struct urb *urb)
1246 {
1247 struct usb_api_data *awd = (struct usb_api_data *)urb->context;
1248
1249 awd->done=1;
1250 wake_up(&awd->wqh);
1251 }
1252
1253 /*-------------------------------------------------------------------*
1254 * COMPATIBILITY STUFF *
1255 *-------------------------------------------------------------------*/
1256
1257 // Starts urb and waits for completion or timeout
1258 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
1259 {
1260 struct usb_api_data awd;
1261 int status;
1262
1263 init_waitqueue_head(&awd.wqh);
1264 awd.done = 0;
1265
1266 urb->context = &awd;
1267 status = usb_submit_urb(urb, GFP_NOIO);
1268 if (status) {
1269 // something went wrong
1270 usb_free_urb(urb);
1271 return status;
1272 }
1273
1274 if (!wait_event_timeout(awd.wqh, awd.done, timeout)) {
1275 // timeout
1276 dev_warn(&urb->dev->dev, "usb_control/bulk_msg: timeout\n");
1277 usb_kill_urb(urb); // remove urb safely
1278 status = -ETIMEDOUT;
1279 }
1280 else {
1281 status = urb->status;
1282 }
1283
1284 if (actual_length) {
1285 *actual_length = urb->actual_length;
1286 }
1287
1288 usb_free_urb(urb);
1289 return status;
1290 }
1291
1292 /*-------------------------------------------------------------------*/
1293 // returns status (negative) or length (positive)
1294 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
1295 unsigned int pipe,
1296 struct usb_ctrlrequest *cmd, void *data,
1297 int len, int timeout)
1298 {
1299 struct urb *urb;
1300 int retv;
1301 int length = 0; /* shut up GCC */
1302
1303 urb = usb_alloc_urb(0, GFP_NOIO);
1304 if (!urb)
1305 return -ENOMEM;
1306
1307 usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data,
1308 len, usb_api_blocking_completion, NULL);
1309
1310 retv = usb_start_wait_urb(urb, timeout, &length);
1311 if (retv < 0) {
1312 return retv;
1313 }
1314 else {
1315 return length;
1316 }
1317 }
1318
1319
1320 /****************************************************************
1321 * kaweth_init
1322 ****************************************************************/
1323 static int __init kaweth_init(void)
1324 {
1325 dbg("Driver loading");
1326 return usb_register(&kaweth_driver);
1327 }
1328
1329 /****************************************************************
1330 * kaweth_exit
1331 ****************************************************************/
1332 static void __exit kaweth_exit(void)
1333 {
1334 usb_deregister(&kaweth_driver);
1335 }
1336
1337 module_init(kaweth_init);
1338 module_exit(kaweth_exit);
1339
1340
1341
1342
1343
1344
1345
1346
1347
Linux kernel - Deliverables
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