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drivers/net/wireless/libertas/cfg.c: needs sched.h
[linux-2.6/x86.git] / drivers / net / usb / kaweth.c
blob2b7b39cad1ce954f7eec5511fefb7f86611c45a1
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
105 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>");
106 MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver");
107 MODULE_LICENSE("GPL");
108 MODULE_FIRMWARE("kaweth/new_code.bin");
109 MODULE_FIRMWARE("kaweth/new_code_fix.bin");
110 MODULE_FIRMWARE("kaweth/trigger_code.bin");
111 MODULE_FIRMWARE("kaweth/trigger_code_fix.bin");
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(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
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 } __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 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 ****************************************************************/
303 static 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 ****************************************************************/
325 static 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 ****************************************************************/
347 static 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 ****************************************************************/
369 static 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 ****************************************************************/
392 static 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 return -ENOSPC;
410 }
411 data_len = fw->size;
412 memcpy(kaweth->firmware_buf, fw->data, fw->size);
413
414 release_firmware(fw);
415
416 kaweth->firmware_buf[2] = (data_len & 0xFF) - 7;
417 kaweth->firmware_buf[3] = data_len >> 8;
418 kaweth->firmware_buf[4] = type;
419 kaweth->firmware_buf[5] = interrupt;
420
421 dbg("High: %i, Low:%i", kaweth->firmware_buf[3],
422 kaweth->firmware_buf[2]);
423
424 dbg("Downloading firmware at %p to kaweth device at %p",
425 fw->data, kaweth);
426 dbg("Firmware length: %d", data_len);
427
428 return kaweth_control(kaweth,
429 usb_sndctrlpipe(kaweth->dev, 0),
430 KAWETH_COMMAND_SCAN,
431 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
432 0,
433 0,
434 (void *)kaweth->firmware_buf,
435 data_len,
436 KAWETH_CONTROL_TIMEOUT);
437 }
438
439 /****************************************************************
440 * kaweth_trigger_firmware
441 ****************************************************************/
442 static int kaweth_trigger_firmware(struct kaweth_device *kaweth,
443 __u8 interrupt)
444 {
445 kaweth->firmware_buf[0] = 0xB6;
446 kaweth->firmware_buf[1] = 0xC3;
447 kaweth->firmware_buf[2] = 0x01;
448 kaweth->firmware_buf[3] = 0x00;
449 kaweth->firmware_buf[4] = 0x06;
450 kaweth->firmware_buf[5] = interrupt;
451 kaweth->firmware_buf[6] = 0x00;
452 kaweth->firmware_buf[7] = 0x00;
453
454 dbg("Triggering firmware");
455
456 return kaweth_control(kaweth,
457 usb_sndctrlpipe(kaweth->dev, 0),
458 KAWETH_COMMAND_SCAN,
459 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
460 0,
461 0,
462 (void *)kaweth->firmware_buf,
463 8,
464 KAWETH_CONTROL_TIMEOUT);
465 }
466
467 /****************************************************************
468 * kaweth_reset
469 ****************************************************************/
470 static int kaweth_reset(struct kaweth_device *kaweth)
471 {
472 int result;
473
474 dbg("kaweth_reset(%p)", kaweth);
475 result = usb_reset_configuration(kaweth->dev);
476 mdelay(10);
477
478 dbg("kaweth_reset() returns %d.",result);
479
480 return result;
481 }
482
483 static void kaweth_usb_receive(struct urb *);
484 static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t);
485
486 /****************************************************************
487 int_callback
488 *****************************************************************/
489
490 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf)
491 {
492 int status;
493
494 status = usb_submit_urb (kaweth->irq_urb, mf);
495 if (unlikely(status == -ENOMEM)) {
496 kaweth->suspend_lowmem_ctrl = 1;
497 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
498 } else {
499 kaweth->suspend_lowmem_ctrl = 0;
500 }
501
502 if (status)
503 err ("can't resubmit intr, %s-%s, status %d",
504 kaweth->dev->bus->bus_name,
505 kaweth->dev->devpath, status);
506 }
507
508 static void int_callback(struct urb *u)
509 {
510 struct kaweth_device *kaweth = u->context;
511 int act_state;
512 int status = u->status;
513
514 switch (status) {
515 case 0: /* success */
516 break;
517 case -ECONNRESET: /* unlink */
518 case -ENOENT:
519 case -ESHUTDOWN:
520 return;
521 /* -EPIPE: should clear the halt */
522 default: /* error */
523 goto resubmit;
524 }
525
526 /* we check the link state to report changes */
527 if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) {
528 if (act_state)
529 netif_carrier_on(kaweth->net);
530 else
531 netif_carrier_off(kaweth->net);
532
533 kaweth->linkstate = act_state;
534 }
535 resubmit:
536 kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC);
537 }
538
539 static void kaweth_resubmit_tl(struct work_struct *work)
540 {
541 struct kaweth_device *kaweth =
542 container_of(work, struct kaweth_device, lowmem_work.work);
543
544 if (IS_BLOCKED(kaweth->status))
545 return;
546
547 if (kaweth->suspend_lowmem_rx)
548 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
549
550 if (kaweth->suspend_lowmem_ctrl)
551 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
552 }
553
554
555 /****************************************************************
556 * kaweth_resubmit_rx_urb
557 ****************************************************************/
558 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth,
559 gfp_t mem_flags)
560 {
561 int result;
562
563 usb_fill_bulk_urb(kaweth->rx_urb,
564 kaweth->dev,
565 usb_rcvbulkpipe(kaweth->dev, 1),
566 kaweth->rx_buf,
567 KAWETH_BUF_SIZE,
568 kaweth_usb_receive,
569 kaweth);
570 kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
571 kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle;
572
573 if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) {
574 if (result == -ENOMEM) {
575 kaweth->suspend_lowmem_rx = 1;
576 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
577 }
578 err("resubmitting rx_urb %d failed", result);
579 } else {
580 kaweth->suspend_lowmem_rx = 0;
581 }
582
583 return result;
584 }
585
586 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth);
587
588 /****************************************************************
589 * kaweth_usb_receive
590 ****************************************************************/
591 static void kaweth_usb_receive(struct urb *urb)
592 {
593 struct kaweth_device *kaweth = urb->context;
594 struct net_device *net = kaweth->net;
595 int status = urb->status;
596
597 int count = urb->actual_length;
598 int count2 = urb->transfer_buffer_length;
599
600 __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf);
601
602 struct sk_buff *skb;
603
604 if (unlikely(status == -EPIPE)) {
605 kaweth->stats.rx_errors++;
606 kaweth->end = 1;
607 wake_up(&kaweth->term_wait);
608 dbg("Status was -EPIPE.");
609 return;
610 }
611 if (unlikely(status == -ECONNRESET || status == -ESHUTDOWN)) {
612 /* we are killed - set a flag and wake the disconnect handler */
613 kaweth->end = 1;
614 wake_up(&kaweth->term_wait);
615 dbg("Status was -ECONNRESET or -ESHUTDOWN.");
616 return;
617 }
618 if (unlikely(status == -EPROTO || status == -ETIME ||
619 status == -EILSEQ)) {
620 kaweth->stats.rx_errors++;
621 dbg("Status was -EPROTO, -ETIME, or -EILSEQ.");
622 return;
623 }
624 if (unlikely(status == -EOVERFLOW)) {
625 kaweth->stats.rx_errors++;
626 dbg("Status was -EOVERFLOW.");
627 }
628 spin_lock(&kaweth->device_lock);
629 if (IS_BLOCKED(kaweth->status)) {
630 spin_unlock(&kaweth->device_lock);
631 return;
632 }
633 spin_unlock(&kaweth->device_lock);
634
635 if(status && status != -EREMOTEIO && count != 1) {
636 err("%s RX status: %d count: %d packet_len: %d",
637 net->name,
638 status,
639 count,
640 (int)pkt_len);
641 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
642 return;
643 }
644
645 if(kaweth->net && (count > 2)) {
646 if(pkt_len > (count - 2)) {
647 err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count);
648 err("Packet len & 2047: %x", pkt_len & 2047);
649 err("Count 2: %x", count2);
650 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
651 return;
652 }
653
654 if(!(skb = dev_alloc_skb(pkt_len+2))) {
655 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
656 return;
657 }
658
659 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
660
661 skb_copy_to_linear_data(skb, kaweth->rx_buf + 2, pkt_len);
662
663 skb_put(skb, pkt_len);
664
665 skb->protocol = eth_type_trans(skb, net);
666
667 netif_rx(skb);
668
669 kaweth->stats.rx_packets++;
670 kaweth->stats.rx_bytes += pkt_len;
671 }
672
673 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
674 }
675
676 /****************************************************************
677 * kaweth_open
678 ****************************************************************/
679 static int kaweth_open(struct net_device *net)
680 {
681 struct kaweth_device *kaweth = netdev_priv(net);
682 int res;
683
684 dbg("Opening network device.");
685
686 res = usb_autopm_get_interface(kaweth->intf);
687 if (res) {
688 err("Interface cannot be resumed.");
689 return -EIO;
690 }
691 res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL);
692 if (res)
693 goto err_out;
694
695 usb_fill_int_urb(
696 kaweth->irq_urb,
697 kaweth->dev,
698 usb_rcvintpipe(kaweth->dev, 3),
699 kaweth->intbuffer,
700 INTBUFFERSIZE,
701 int_callback,
702 kaweth,
703 250); /* overriding the descriptor */
704 kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle;
705 kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
706
707 res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL);
708 if (res) {
709 usb_kill_urb(kaweth->rx_urb);
710 goto err_out;
711 }
712 kaweth->opened = 1;
713
714 netif_start_queue(net);
715
716 kaweth_async_set_rx_mode(kaweth);
717 return 0;
718
719 err_out:
720 usb_autopm_put_interface(kaweth->intf);
721 return -EIO;
722 }
723
724 /****************************************************************
725 * kaweth_kill_urbs
726 ****************************************************************/
727 static void kaweth_kill_urbs(struct kaweth_device *kaweth)
728 {
729 usb_kill_urb(kaweth->irq_urb);
730 usb_kill_urb(kaweth->rx_urb);
731 usb_kill_urb(kaweth->tx_urb);
732
733 cancel_delayed_work_sync(&kaweth->lowmem_work);
734
735 /* a scheduled work may have resubmitted,
736 we hit them again */
737 usb_kill_urb(kaweth->irq_urb);
738 usb_kill_urb(kaweth->rx_urb);
739 }
740
741 /****************************************************************
742 * kaweth_close
743 ****************************************************************/
744 static int kaweth_close(struct net_device *net)
745 {
746 struct kaweth_device *kaweth = netdev_priv(net);
747
748 netif_stop_queue(net);
749 kaweth->opened = 0;
750
751 kaweth->status |= KAWETH_STATUS_CLOSING;
752
753 kaweth_kill_urbs(kaweth);
754
755 kaweth->status &= ~KAWETH_STATUS_CLOSING;
756
757 usb_autopm_put_interface(kaweth->intf);
758
759 return 0;
760 }
761
762 static void kaweth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
763 {
764 struct kaweth_device *kaweth = netdev_priv(dev);
765
766 strlcpy(info->driver, driver_name, sizeof(info->driver));
767 usb_make_path(kaweth->dev, info->bus_info, sizeof (info->bus_info));
768 }
769
770 static u32 kaweth_get_link(struct net_device *dev)
771 {
772 struct kaweth_device *kaweth = netdev_priv(dev);
773
774 return kaweth->linkstate;
775 }
776
777 static const struct ethtool_ops ops = {
778 .get_drvinfo = kaweth_get_drvinfo,
779 .get_link = kaweth_get_link
780 };
781
782 /****************************************************************
783 * kaweth_usb_transmit_complete
784 ****************************************************************/
785 static void kaweth_usb_transmit_complete(struct urb *urb)
786 {
787 struct kaweth_device *kaweth = urb->context;
788 struct sk_buff *skb = kaweth->tx_skb;
789 int status = urb->status;
790
791 if (unlikely(status != 0))
792 if (status != -ENOENT)
793 dbg("%s: TX status %d.", kaweth->net->name, status);
794
795 netif_wake_queue(kaweth->net);
796 dev_kfree_skb_irq(skb);
797 }
798
799 /****************************************************************
800 * kaweth_start_xmit
801 ****************************************************************/
802 static netdev_tx_t kaweth_start_xmit(struct sk_buff *skb,
803 struct net_device *net)
804 {
805 struct kaweth_device *kaweth = netdev_priv(net);
806 __le16 *private_header;
807
808 int res;
809
810 spin_lock_irq(&kaweth->device_lock);
811
812 kaweth_async_set_rx_mode(kaweth);
813 netif_stop_queue(net);
814 if (IS_BLOCKED(kaweth->status)) {
815 goto skip;
816 }
817
818 /* We now decide whether we can put our special header into the sk_buff */
819 if (skb_cloned(skb) || skb_headroom(skb) < 2) {
820 /* no such luck - we make our own */
821 struct sk_buff *copied_skb;
822 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC);
823 dev_kfree_skb_irq(skb);
824 skb = copied_skb;
825 if (!copied_skb) {
826 kaweth->stats.tx_errors++;
827 netif_start_queue(net);
828 spin_unlock_irq(&kaweth->device_lock);
829 return NETDEV_TX_OK;
830 }
831 }
832
833 private_header = (__le16 *)__skb_push(skb, 2);
834 *private_header = cpu_to_le16(skb->len-2);
835 kaweth->tx_skb = skb;
836
837 usb_fill_bulk_urb(kaweth->tx_urb,
838 kaweth->dev,
839 usb_sndbulkpipe(kaweth->dev, 2),
840 private_header,
841 skb->len,
842 kaweth_usb_transmit_complete,
843 kaweth);
844 kaweth->end = 0;
845
846 if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
847 {
848 dev_warn(&net->dev, "kaweth failed tx_urb %d\n", res);
849 skip:
850 kaweth->stats.tx_errors++;
851
852 netif_start_queue(net);
853 dev_kfree_skb_irq(skb);
854 }
855 else
856 {
857 kaweth->stats.tx_packets++;
858 kaweth->stats.tx_bytes += skb->len;
859 }
860
861 spin_unlock_irq(&kaweth->device_lock);
862
863 return NETDEV_TX_OK;
864 }
865
866 /****************************************************************
867 * kaweth_set_rx_mode
868 ****************************************************************/
869 static void kaweth_set_rx_mode(struct net_device *net)
870 {
871 struct kaweth_device *kaweth = netdev_priv(net);
872
873 __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
874 KAWETH_PACKET_FILTER_BROADCAST |
875 KAWETH_PACKET_FILTER_MULTICAST;
876
877 dbg("Setting Rx mode to %d", packet_filter_bitmap);
878
879 netif_stop_queue(net);
880
881 if (net->flags & IFF_PROMISC) {
882 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
883 }
884 else if (!netdev_mc_empty(net) || (net->flags & IFF_ALLMULTI)) {
885 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
886 }
887
888 kaweth->packet_filter_bitmap = packet_filter_bitmap;
889 netif_wake_queue(net);
890 }
891
892 /****************************************************************
893 * kaweth_async_set_rx_mode
894 ****************************************************************/
895 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
896 {
897 int result;
898 __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
899
900 kaweth->packet_filter_bitmap = 0;
901 if (packet_filter_bitmap == 0)
902 return;
903
904 if (in_interrupt())
905 return;
906
907 result = kaweth_control(kaweth,
908 usb_sndctrlpipe(kaweth->dev, 0),
909 KAWETH_COMMAND_SET_PACKET_FILTER,
910 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
911 packet_filter_bitmap,
912 0,
913 (void *)&kaweth->scratch,
914 0,
915 KAWETH_CONTROL_TIMEOUT);
916
917 if(result < 0) {
918 err("Failed to set Rx mode: %d", result);
919 }
920 else {
921 dbg("Set Rx mode to %d", packet_filter_bitmap);
922 }
923 }
924
925 /****************************************************************
926 * kaweth_netdev_stats
927 ****************************************************************/
928 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev)
929 {
930 struct kaweth_device *kaweth = netdev_priv(dev);
931 return &kaweth->stats;
932 }
933
934 /****************************************************************
935 * kaweth_tx_timeout
936 ****************************************************************/
937 static void kaweth_tx_timeout(struct net_device *net)
938 {
939 struct kaweth_device *kaweth = netdev_priv(net);
940
941 dev_warn(&net->dev, "%s: Tx timed out. Resetting.\n", net->name);
942 kaweth->stats.tx_errors++;
943 net->trans_start = jiffies;
944
945 usb_unlink_urb(kaweth->tx_urb);
946 }
947
948 /****************************************************************
949 * kaweth_suspend
950 ****************************************************************/
951 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message)
952 {
953 struct kaweth_device *kaweth = usb_get_intfdata(intf);
954 unsigned long flags;
955
956 dbg("Suspending device");
957 spin_lock_irqsave(&kaweth->device_lock, flags);
958 kaweth->status |= KAWETH_STATUS_SUSPENDING;
959 spin_unlock_irqrestore(&kaweth->device_lock, flags);
960
961 kaweth_kill_urbs(kaweth);
962 return 0;
963 }
964
965 /****************************************************************
966 * kaweth_resume
967 ****************************************************************/
968 static int kaweth_resume(struct usb_interface *intf)
969 {
970 struct kaweth_device *kaweth = usb_get_intfdata(intf);
971 unsigned long flags;
972
973 dbg("Resuming device");
974 spin_lock_irqsave(&kaweth->device_lock, flags);
975 kaweth->status &= ~KAWETH_STATUS_SUSPENDING;
976 spin_unlock_irqrestore(&kaweth->device_lock, flags);
977
978 if (!kaweth->opened)
979 return 0;
980 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
981 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
982
983 return 0;
984 }
985
986 /****************************************************************
987 * kaweth_probe
988 ****************************************************************/
989
990
991 static const struct net_device_ops kaweth_netdev_ops = {
992 .ndo_open = kaweth_open,
993 .ndo_stop = kaweth_close,
994 .ndo_start_xmit = kaweth_start_xmit,
995 .ndo_tx_timeout = kaweth_tx_timeout,
996 .ndo_set_multicast_list = kaweth_set_rx_mode,
997 .ndo_get_stats = kaweth_netdev_stats,
998 .ndo_change_mtu = eth_change_mtu,
999 .ndo_set_mac_address = eth_mac_addr,
1000 .ndo_validate_addr = eth_validate_addr,
1001 };
1002
1003 static int kaweth_probe(
1004 struct usb_interface *intf,
1005 const struct usb_device_id *id /* from id_table */
1006 )
1007 {
1008 struct usb_device *dev = interface_to_usbdev(intf);
1009 struct kaweth_device *kaweth;
1010 struct net_device *netdev;
1011 const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
1012 int result = 0;
1013
1014 dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x",
1015 dev->devnum,
1016 le16_to_cpu(dev->descriptor.idVendor),
1017 le16_to_cpu(dev->descriptor.idProduct),
1018 le16_to_cpu(dev->descriptor.bcdDevice));
1019
1020 dbg("Device at %p", dev);
1021
1022 dbg("Descriptor length: %x type: %x",
1023 (int)dev->descriptor.bLength,
1024 (int)dev->descriptor.bDescriptorType);
1025
1026 netdev = alloc_etherdev(sizeof(*kaweth));
1027 if (!netdev)
1028 return -ENOMEM;
1029
1030 kaweth = netdev_priv(netdev);
1031 kaweth->dev = dev;
1032 kaweth->net = netdev;
1033
1034 spin_lock_init(&kaweth->device_lock);
1035 init_waitqueue_head(&kaweth->term_wait);
1036
1037 dbg("Resetting.");
1038
1039 kaweth_reset(kaweth);
1040
1041 /*
1042 * If high byte of bcdDevice is nonzero, firmware is already
1043 * downloaded. Don't try to do it again, or we'll hang the device.
1044 */
1045
1046 if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) {
1047 dev_info(&intf->dev, "Firmware present in device.\n");
1048 } else {
1049 /* Download the firmware */
1050 dev_info(&intf->dev, "Downloading firmware...\n");
1051 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
1052 if ((result = kaweth_download_firmware(kaweth,
1053 "kaweth/new_code.bin",
1054 100,
1055 2)) < 0) {
1056 err("Error downloading firmware (%d)", result);
1057 goto err_fw;
1058 }
1059
1060 if ((result = kaweth_download_firmware(kaweth,
1061 "kaweth/new_code_fix.bin",
1062 100,
1063 3)) < 0) {
1064 err("Error downloading firmware fix (%d)", result);
1065 goto err_fw;
1066 }
1067
1068 if ((result = kaweth_download_firmware(kaweth,
1069 "kaweth/trigger_code.bin",
1070 126,
1071 2)) < 0) {
1072 err("Error downloading trigger code (%d)", result);
1073 goto err_fw;
1074
1075 }
1076
1077 if ((result = kaweth_download_firmware(kaweth,
1078 "kaweth/trigger_code_fix.bin",
1079 126,
1080 3)) < 0) {
1081 err("Error downloading trigger code fix (%d)", result);
1082 goto err_fw;
1083 }
1084
1085
1086 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
1087 err("Error triggering firmware (%d)", result);
1088 goto err_fw;
1089 }
1090
1091 /* Device will now disappear for a moment... */
1092 dev_info(&intf->dev, "Firmware loaded. I'll be back...\n");
1093 err_fw:
1094 free_page((unsigned long)kaweth->firmware_buf);
1095 free_netdev(netdev);
1096 return -EIO;
1097 }
1098
1099 result = kaweth_read_configuration(kaweth);
1100
1101 if(result < 0) {
1102 err("Error reading configuration (%d), no net device created", result);
1103 goto err_free_netdev;
1104 }
1105
1106 dev_info(&intf->dev, "Statistics collection: %x\n", kaweth->configuration.statistics_mask);
1107 dev_info(&intf->dev, "Multicast filter limit: %x\n", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
1108 dev_info(&intf->dev, "MTU: %d\n", le16_to_cpu(kaweth->configuration.segment_size));
1109 dev_info(&intf->dev, "Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x\n",
1110 (int)kaweth->configuration.hw_addr[0],
1111 (int)kaweth->configuration.hw_addr[1],
1112 (int)kaweth->configuration.hw_addr[2],
1113 (int)kaweth->configuration.hw_addr[3],
1114 (int)kaweth->configuration.hw_addr[4],
1115 (int)kaweth->configuration.hw_addr[5]);
1116
1117 if(!memcmp(&kaweth->configuration.hw_addr,
1118 &bcast_addr,
1119 sizeof(bcast_addr))) {
1120 err("Firmware not functioning properly, no net device created");
1121 goto err_free_netdev;
1122 }
1123
1124 if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
1125 dbg("Error setting URB size");
1126 goto err_free_netdev;
1127 }
1128
1129 if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
1130 err("Error setting SOFS wait");
1131 goto err_free_netdev;
1132 }
1133
1134 result = kaweth_set_receive_filter(kaweth,
1135 KAWETH_PACKET_FILTER_DIRECTED |
1136 KAWETH_PACKET_FILTER_BROADCAST |
1137 KAWETH_PACKET_FILTER_MULTICAST);
1138
1139 if(result < 0) {
1140 err("Error setting receive filter");
1141 goto err_free_netdev;
1142 }
1143
1144 dbg("Initializing net device.");
1145
1146 kaweth->intf = intf;
1147
1148 kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1149 if (!kaweth->tx_urb)
1150 goto err_free_netdev;
1151 kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1152 if (!kaweth->rx_urb)
1153 goto err_only_tx;
1154 kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1155 if (!kaweth->irq_urb)
1156 goto err_tx_and_rx;
1157
1158 kaweth->intbuffer = usb_alloc_coherent( kaweth->dev,
1159 INTBUFFERSIZE,
1160 GFP_KERNEL,
1161 &kaweth->intbufferhandle);
1162 if (!kaweth->intbuffer)
1163 goto err_tx_and_rx_and_irq;
1164 kaweth->rx_buf = usb_alloc_coherent( kaweth->dev,
1165 KAWETH_BUF_SIZE,
1166 GFP_KERNEL,
1167 &kaweth->rxbufferhandle);
1168 if (!kaweth->rx_buf)
1169 goto err_all_but_rxbuf;
1170
1171 memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr));
1172 memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr,
1173 sizeof(kaweth->configuration.hw_addr));
1174
1175 netdev->netdev_ops = &kaweth_netdev_ops;
1176 netdev->watchdog_timeo = KAWETH_TX_TIMEOUT;
1177 netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size);
1178 SET_ETHTOOL_OPS(netdev, &ops);
1179
1180 /* kaweth is zeroed as part of alloc_netdev */
1181 INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl);
1182 usb_set_intfdata(intf, kaweth);
1183
1184 #if 0
1185 // dma_supported() is deeply broken on almost all architectures
1186 if (dma_supported (&intf->dev, 0xffffffffffffffffULL))
1187 kaweth->net->features |= NETIF_F_HIGHDMA;
1188 #endif
1189
1190 SET_NETDEV_DEV(netdev, &intf->dev);
1191 if (register_netdev(netdev) != 0) {
1192 err("Error registering netdev.");
1193 goto err_intfdata;
1194 }
1195
1196 dev_info(&intf->dev, "kaweth interface created at %s\n",
1197 kaweth->net->name);
1198
1199 dbg("Kaweth probe returning.");
1200
1201 return 0;
1202
1203 err_intfdata:
1204 usb_set_intfdata(intf, NULL);
1205 usb_free_coherent(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1206 err_all_but_rxbuf:
1207 usb_free_coherent(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1208 err_tx_and_rx_and_irq:
1209 usb_free_urb(kaweth->irq_urb);
1210 err_tx_and_rx:
1211 usb_free_urb(kaweth->rx_urb);
1212 err_only_tx:
1213 usb_free_urb(kaweth->tx_urb);
1214 err_free_netdev:
1215 free_netdev(netdev);
1216
1217 return -EIO;
1218 }
1219
1220 /****************************************************************
1221 * kaweth_disconnect
1222 ****************************************************************/
1223 static void kaweth_disconnect(struct usb_interface *intf)
1224 {
1225 struct kaweth_device *kaweth = usb_get_intfdata(intf);
1226 struct net_device *netdev;
1227
1228 dev_info(&intf->dev, "Unregistering\n");
1229
1230 usb_set_intfdata(intf, NULL);
1231 if (!kaweth) {
1232 dev_warn(&intf->dev, "unregistering non-existant device\n");
1233 return;
1234 }
1235 netdev = kaweth->net;
1236
1237 dbg("Unregistering net device");
1238 unregister_netdev(netdev);
1239
1240 usb_free_urb(kaweth->rx_urb);
1241 usb_free_urb(kaweth->tx_urb);
1242 usb_free_urb(kaweth->irq_urb);
1243
1244 usb_free_coherent(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1245 usb_free_coherent(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1246
1247 free_netdev(netdev);
1248 }
1249
1250
1251 // FIXME this completion stuff is a modified clone of
1252 // an OLD version of some stuff in usb.c ...
1253 struct usb_api_data {
1254 wait_queue_head_t wqh;
1255 int done;
1256 };
1257
1258 /*-------------------------------------------------------------------*
1259 * completion handler for compatibility wrappers (sync control/bulk) *
1260 *-------------------------------------------------------------------*/
1261 static void usb_api_blocking_completion(struct urb *urb)
1262 {
1263 struct usb_api_data *awd = (struct usb_api_data *)urb->context;
1264
1265 awd->done=1;
1266 wake_up(&awd->wqh);
1267 }
1268
1269 /*-------------------------------------------------------------------*
1270 * COMPATIBILITY STUFF *
1271 *-------------------------------------------------------------------*/
1272
1273 // Starts urb and waits for completion or timeout
1274 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
1275 {
1276 struct usb_api_data awd;
1277 int status;
1278
1279 init_waitqueue_head(&awd.wqh);
1280 awd.done = 0;
1281
1282 urb->context = &awd;
1283 status = usb_submit_urb(urb, GFP_NOIO);
1284 if (status) {
1285 // something went wrong
1286 usb_free_urb(urb);
1287 return status;
1288 }
1289
1290 if (!wait_event_timeout(awd.wqh, awd.done, timeout)) {
1291 // timeout
1292 dev_warn(&urb->dev->dev, "usb_control/bulk_msg: timeout\n");
1293 usb_kill_urb(urb); // remove urb safely
1294 status = -ETIMEDOUT;
1295 }
1296 else {
1297 status = urb->status;
1298 }
1299
1300 if (actual_length) {
1301 *actual_length = urb->actual_length;
1302 }
1303
1304 usb_free_urb(urb);
1305 return status;
1306 }
1307
1308 /*-------------------------------------------------------------------*/
1309 // returns status (negative) or length (positive)
1310 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
1311 unsigned int pipe,
1312 struct usb_ctrlrequest *cmd, void *data,
1313 int len, int timeout)
1314 {
1315 struct urb *urb;
1316 int retv;
1317 int length = 0; /* shut up GCC */
1318
1319 urb = usb_alloc_urb(0, GFP_NOIO);
1320 if (!urb)
1321 return -ENOMEM;
1322
1323 usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data,
1324 len, usb_api_blocking_completion, NULL);
1325
1326 retv = usb_start_wait_urb(urb, timeout, &length);
1327 if (retv < 0) {
1328 return retv;
1329 }
1330 else {
1331 return length;
1332 }
1333 }
1334
1335
1336 /****************************************************************
1337 * kaweth_init
1338 ****************************************************************/
1339 static int __init kaweth_init(void)
1340 {
1341 dbg("Driver loading");
1342 return usb_register(&kaweth_driver);
1343 }
1344
1345 /****************************************************************
1346 * kaweth_exit
1347 ****************************************************************/
1348 static void __exit kaweth_exit(void)
1349 {
1350 usb_deregister(&kaweth_driver);
1351 }
1352
1353 module_init(kaweth_init);
1354 module_exit(kaweth_exit);
1355
1356
1357
1358
1359
1360
1361
1362
1363
x86 "subsystem" repository