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Merge remote-tracking branch 'selinux/next'
[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, see <http://www.gnu.org/licenses/>.
29 *
30 ****************************************************************/
31
32 /* TODO:
33 * Develop test procedures for USB net interfaces
34 * Run test procedures
35 * Fix bugs from previous two steps
36 * Snoop other OSs for any tricks we're not doing
37 * Reduce arbitrary timeouts
38 * Smart multicast support
39 * Temporary MAC change support
40 * Tunable SOFs parameter - ioctl()?
41 * Ethernet stats collection
42 * Code formatting improvements
43 */
44
45 #include <linux/module.h>
46 #include <linux/slab.h>
47 #include <linux/string.h>
48 #include <linux/delay.h>
49 #include <linux/netdevice.h>
50 #include <linux/etherdevice.h>
51 #include <linux/usb.h>
52 #include <linux/types.h>
53 #include <linux/ethtool.h>
54 #include <linux/dma-mapping.h>
55 #include <linux/wait.h>
56 #include <linux/firmware.h>
57 #include <asm/uaccess.h>
58 #include <asm/byteorder.h>
59
60 #undef DEBUG
61
62 #define KAWETH_MTU 1514
63 #define KAWETH_BUF_SIZE 1664
64 #define KAWETH_TX_TIMEOUT (5 * HZ)
65 #define KAWETH_SCRATCH_SIZE 32
66 #define KAWETH_FIRMWARE_BUF_SIZE 4096
67 #define KAWETH_CONTROL_TIMEOUT (30000)
68
69 #define KAWETH_STATUS_BROKEN 0x0000001
70 #define KAWETH_STATUS_CLOSING 0x0000002
71 #define KAWETH_STATUS_SUSPENDING 0x0000004
72
73 #define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING)
74
75 #define KAWETH_PACKET_FILTER_PROMISCUOUS 0x01
76 #define KAWETH_PACKET_FILTER_ALL_MULTICAST 0x02
77 #define KAWETH_PACKET_FILTER_DIRECTED 0x04
78 #define KAWETH_PACKET_FILTER_BROADCAST 0x08
79 #define KAWETH_PACKET_FILTER_MULTICAST 0x10
80
81 /* Table 7 */
82 #define KAWETH_COMMAND_GET_ETHERNET_DESC 0x00
83 #define KAWETH_COMMAND_MULTICAST_FILTERS 0x01
84 #define KAWETH_COMMAND_SET_PACKET_FILTER 0x02
85 #define KAWETH_COMMAND_STATISTICS 0x03
86 #define KAWETH_COMMAND_SET_TEMP_MAC 0x06
87 #define KAWETH_COMMAND_GET_TEMP_MAC 0x07
88 #define KAWETH_COMMAND_SET_URB_SIZE 0x08
89 #define KAWETH_COMMAND_SET_SOFS_WAIT 0x09
90 #define KAWETH_COMMAND_SCAN 0xFF
91
92 #define KAWETH_SOFS_TO_WAIT 0x05
93
94 #define INTBUFFERSIZE 4
95
96 #define STATE_OFFSET 0
97 #define STATE_MASK 0x40
98 #define STATE_SHIFT 5
99
100 #define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED)
101
102
103 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>");
104 MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver");
105 MODULE_LICENSE("GPL");
106 MODULE_FIRMWARE("kaweth/new_code.bin");
107 MODULE_FIRMWARE("kaweth/new_code_fix.bin");
108 MODULE_FIRMWARE("kaweth/trigger_code.bin");
109 MODULE_FIRMWARE("kaweth/trigger_code_fix.bin");
110
111 static const char driver_name[] = "kaweth";
112
113 static int kaweth_probe(
114 struct usb_interface *intf,
115 const struct usb_device_id *id /* from id_table */
116 );
117 static void kaweth_disconnect(struct usb_interface *intf);
118 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
119 unsigned int pipe,
120 struct usb_ctrlrequest *cmd, void *data,
121 int len, int timeout);
122 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message);
123 static int kaweth_resume(struct usb_interface *intf);
124
125 /****************************************************************
126 * usb_device_id
127 ****************************************************************/
128 static struct usb_device_id usb_klsi_table[] = {
129 { USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */
130 { USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */
131 { USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */
132 { USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */
133 { USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */
134 { USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */
135 { USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */
136 { USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */
137 { USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */
138 { USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */
139 { USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */
140 { USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */
141 { USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */
142 { USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */
143 { USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */
144 { USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */
145 { USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */
146 { USB_DEVICE(0x07c9, 0xb010) }, /* Allied Telesyn AT-USB10 USB Ethernet Adapter */
147 { USB_DEVICE(0x0846, 0x1001) }, /* NetGear EA-101 */
148 { USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */
149 { USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */
150 { USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */
151 { USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */
152 { USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */
153 { USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */
154 { USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */
155 { USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */
156 { USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */
157 { USB_DEVICE(0x1485, 0x0001) }, /* Silicom U2E */
158 { USB_DEVICE(0x1485, 0x0002) }, /* Psion Dacom Gold Port Ethernet */
159 { USB_DEVICE(0x1645, 0x0005) }, /* Entrega E45 */
160 { USB_DEVICE(0x1645, 0x0008) }, /* Entrega USB Ethernet Adapter */
161 { USB_DEVICE(0x1645, 0x8005) }, /* PortGear Ethernet Adapter */
162 { USB_DEVICE(0x1668, 0x0323) }, /* Actiontec USB Ethernet */
163 { USB_DEVICE(0x2001, 0x4000) }, /* D-link DSB-650C */
164 {} /* Null terminator */
165 };
166
167 MODULE_DEVICE_TABLE (usb, usb_klsi_table);
168
169 /****************************************************************
170 * kaweth_driver
171 ****************************************************************/
172 static struct usb_driver kaweth_driver = {
173 .name = driver_name,
174 .probe = kaweth_probe,
175 .disconnect = kaweth_disconnect,
176 .suspend = kaweth_suspend,
177 .resume = kaweth_resume,
178 .id_table = usb_klsi_table,
179 .supports_autosuspend = 1,
180 .disable_hub_initiated_lpm = 1,
181 };
182
183 typedef __u8 eth_addr_t[6];
184
185 /****************************************************************
186 * usb_eth_dev
187 ****************************************************************/
188 struct usb_eth_dev {
189 char *name;
190 __u16 vendor;
191 __u16 device;
192 void *pdata;
193 };
194
195 /****************************************************************
196 * kaweth_ethernet_configuration
197 * Refer Table 8
198 ****************************************************************/
199 struct kaweth_ethernet_configuration
200 {
201 __u8 size;
202 __u8 reserved1;
203 __u8 reserved2;
204 eth_addr_t hw_addr;
205 __u32 statistics_mask;
206 __le16 segment_size;
207 __u16 max_multicast_filters;
208 __u8 reserved3;
209 } __packed;
210
211 /****************************************************************
212 * kaweth_device
213 ****************************************************************/
214 struct kaweth_device
215 {
216 spinlock_t device_lock;
217
218 __u32 status;
219 int end;
220 int suspend_lowmem_rx;
221 int suspend_lowmem_ctrl;
222 int linkstate;
223 int opened;
224 struct delayed_work lowmem_work;
225
226 struct usb_device *dev;
227 struct usb_interface *intf;
228 struct net_device *net;
229 wait_queue_head_t term_wait;
230
231 struct urb *rx_urb;
232 struct urb *tx_urb;
233 struct urb *irq_urb;
234
235 dma_addr_t intbufferhandle;
236 __u8 *intbuffer;
237 dma_addr_t rxbufferhandle;
238 __u8 *rx_buf;
239
240
241 struct sk_buff *tx_skb;
242
243 __u8 *firmware_buf;
244 __u8 scratch[KAWETH_SCRATCH_SIZE];
245 __u16 packet_filter_bitmap;
246
247 struct kaweth_ethernet_configuration configuration;
248
249 struct net_device_stats stats;
250 };
251
252 /****************************************************************
253 * kaweth_control
254 ****************************************************************/
255 static int kaweth_control(struct kaweth_device *kaweth,
256 unsigned int pipe,
257 __u8 request,
258 __u8 requesttype,
259 __u16 value,
260 __u16 index,
261 void *data,
262 __u16 size,
263 int timeout)
264 {
265 struct usb_ctrlrequest *dr;
266 int retval;
267
268 if(in_interrupt()) {
269 netdev_dbg(kaweth->net, "in_interrupt()\n");
270 return -EBUSY;
271 }
272
273 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
274 if (!dr)
275 return -ENOMEM;
276
277 dr->bRequestType = requesttype;
278 dr->bRequest = request;
279 dr->wValue = cpu_to_le16(value);
280 dr->wIndex = cpu_to_le16(index);
281 dr->wLength = cpu_to_le16(size);
282
283 retval = kaweth_internal_control_msg(kaweth->dev,
284 pipe,
285 dr,
286 data,
287 size,
288 timeout);
289
290 kfree(dr);
291 return retval;
292 }
293
294 /****************************************************************
295 * kaweth_read_configuration
296 ****************************************************************/
297 static int kaweth_read_configuration(struct kaweth_device *kaweth)
298 {
299 int retval;
300
301 retval = kaweth_control(kaweth,
302 usb_rcvctrlpipe(kaweth->dev, 0),
303 KAWETH_COMMAND_GET_ETHERNET_DESC,
304 USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE,
305 0,
306 0,
307 (void *)&kaweth->configuration,
308 sizeof(kaweth->configuration),
309 KAWETH_CONTROL_TIMEOUT);
310
311 return retval;
312 }
313
314 /****************************************************************
315 * kaweth_set_urb_size
316 ****************************************************************/
317 static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size)
318 {
319 int retval;
320
321 netdev_dbg(kaweth->net, "Setting URB size to %d\n", (unsigned)urb_size);
322
323 retval = kaweth_control(kaweth,
324 usb_sndctrlpipe(kaweth->dev, 0),
325 KAWETH_COMMAND_SET_URB_SIZE,
326 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
327 urb_size,
328 0,
329 (void *)&kaweth->scratch,
330 0,
331 KAWETH_CONTROL_TIMEOUT);
332
333 return retval;
334 }
335
336 /****************************************************************
337 * kaweth_set_sofs_wait
338 ****************************************************************/
339 static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait)
340 {
341 int retval;
342
343 netdev_dbg(kaweth->net, "Set SOFS wait to %d\n", (unsigned)sofs_wait);
344
345 retval = kaweth_control(kaweth,
346 usb_sndctrlpipe(kaweth->dev, 0),
347 KAWETH_COMMAND_SET_SOFS_WAIT,
348 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
349 sofs_wait,
350 0,
351 (void *)&kaweth->scratch,
352 0,
353 KAWETH_CONTROL_TIMEOUT);
354
355 return retval;
356 }
357
358 /****************************************************************
359 * kaweth_set_receive_filter
360 ****************************************************************/
361 static int kaweth_set_receive_filter(struct kaweth_device *kaweth,
362 __u16 receive_filter)
363 {
364 int retval;
365
366 netdev_dbg(kaweth->net, "Set receive filter to %d\n",
367 (unsigned)receive_filter);
368
369 retval = kaweth_control(kaweth,
370 usb_sndctrlpipe(kaweth->dev, 0),
371 KAWETH_COMMAND_SET_PACKET_FILTER,
372 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
373 receive_filter,
374 0,
375 (void *)&kaweth->scratch,
376 0,
377 KAWETH_CONTROL_TIMEOUT);
378
379 return retval;
380 }
381
382 /****************************************************************
383 * kaweth_download_firmware
384 ****************************************************************/
385 static int kaweth_download_firmware(struct kaweth_device *kaweth,
386 const char *fwname,
387 __u8 interrupt,
388 __u8 type)
389 {
390 const struct firmware *fw;
391 int data_len;
392 int ret;
393
394 ret = request_firmware(&fw, fwname, &kaweth->dev->dev);
395 if (ret) {
396 dev_err(&kaweth->intf->dev, "Firmware request failed\n");
397 return ret;
398 }
399
400 if (fw->size > KAWETH_FIRMWARE_BUF_SIZE) {
401 dev_err(&kaweth->intf->dev, "Firmware too big: %zu\n",
402 fw->size);
403 release_firmware(fw);
404 return -ENOSPC;
405 }
406 data_len = fw->size;
407 memcpy(kaweth->firmware_buf, fw->data, fw->size);
408
409 release_firmware(fw);
410
411 kaweth->firmware_buf[2] = (data_len & 0xFF) - 7;
412 kaweth->firmware_buf[3] = data_len >> 8;
413 kaweth->firmware_buf[4] = type;
414 kaweth->firmware_buf[5] = interrupt;
415
416 netdev_dbg(kaweth->net, "High: %i, Low:%i\n", kaweth->firmware_buf[3],
417 kaweth->firmware_buf[2]);
418
419 netdev_dbg(kaweth->net,
420 "Downloading firmware at %p to kaweth device at %p\n",
421 kaweth->firmware_buf, kaweth);
422 netdev_dbg(kaweth->net, "Firmware length: %d\n", 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 return kaweth_control(kaweth,
451 usb_sndctrlpipe(kaweth->dev, 0),
452 KAWETH_COMMAND_SCAN,
453 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
454 0,
455 0,
456 (void *)kaweth->firmware_buf,
457 8,
458 KAWETH_CONTROL_TIMEOUT);
459 }
460
461 /****************************************************************
462 * kaweth_reset
463 ****************************************************************/
464 static int kaweth_reset(struct kaweth_device *kaweth)
465 {
466 int result;
467
468 result = usb_reset_configuration(kaweth->dev);
469 mdelay(10);
470
471 netdev_dbg(kaweth->net, "kaweth_reset() returns %d.\n", result);
472
473 return result;
474 }
475
476 static void kaweth_usb_receive(struct urb *);
477 static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t);
478
479 /****************************************************************
480 int_callback
481 *****************************************************************/
482
483 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf)
484 {
485 int status;
486
487 status = usb_submit_urb (kaweth->irq_urb, mf);
488 if (unlikely(status == -ENOMEM)) {
489 kaweth->suspend_lowmem_ctrl = 1;
490 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
491 } else {
492 kaweth->suspend_lowmem_ctrl = 0;
493 }
494
495 if (status)
496 dev_err(&kaweth->intf->dev,
497 "can't resubmit intr, %s-%s, status %d\n",
498 kaweth->dev->bus->bus_name,
499 kaweth->dev->devpath, status);
500 }
501
502 static void int_callback(struct urb *u)
503 {
504 struct kaweth_device *kaweth = u->context;
505 int act_state;
506 int status = u->status;
507
508 switch (status) {
509 case 0: /* success */
510 break;
511 case -ECONNRESET: /* unlink */
512 case -ENOENT:
513 case -ESHUTDOWN:
514 return;
515 /* -EPIPE: should clear the halt */
516 default: /* error */
517 goto resubmit;
518 }
519
520 /* we check the link state to report changes */
521 if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) {
522 if (act_state)
523 netif_carrier_on(kaweth->net);
524 else
525 netif_carrier_off(kaweth->net);
526
527 kaweth->linkstate = act_state;
528 }
529 resubmit:
530 kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC);
531 }
532
533 static void kaweth_resubmit_tl(struct work_struct *work)
534 {
535 struct kaweth_device *kaweth =
536 container_of(work, struct kaweth_device, lowmem_work.work);
537
538 if (IS_BLOCKED(kaweth->status))
539 return;
540
541 if (kaweth->suspend_lowmem_rx)
542 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
543
544 if (kaweth->suspend_lowmem_ctrl)
545 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
546 }
547
548
549 /****************************************************************
550 * kaweth_resubmit_rx_urb
551 ****************************************************************/
552 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth,
553 gfp_t mem_flags)
554 {
555 int result;
556
557 usb_fill_bulk_urb(kaweth->rx_urb,
558 kaweth->dev,
559 usb_rcvbulkpipe(kaweth->dev, 1),
560 kaweth->rx_buf,
561 KAWETH_BUF_SIZE,
562 kaweth_usb_receive,
563 kaweth);
564 kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
565 kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle;
566
567 if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) {
568 if (result == -ENOMEM) {
569 kaweth->suspend_lowmem_rx = 1;
570 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
571 }
572 dev_err(&kaweth->intf->dev, "resubmitting rx_urb %d failed\n",
573 result);
574 } else {
575 kaweth->suspend_lowmem_rx = 0;
576 }
577
578 return result;
579 }
580
581 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth);
582
583 /****************************************************************
584 * kaweth_usb_receive
585 ****************************************************************/
586 static void kaweth_usb_receive(struct urb *urb)
587 {
588 struct device *dev = &urb->dev->dev;
589 struct kaweth_device *kaweth = urb->context;
590 struct net_device *net = kaweth->net;
591 int status = urb->status;
592
593 int count = urb->actual_length;
594 int count2 = urb->transfer_buffer_length;
595
596 __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf);
597
598 struct sk_buff *skb;
599
600 if (unlikely(status == -EPIPE)) {
601 kaweth->stats.rx_errors++;
602 kaweth->end = 1;
603 wake_up(&kaweth->term_wait);
604 dev_dbg(dev, "Status was -EPIPE.\n");
605 return;
606 }
607 if (unlikely(status == -ECONNRESET || status == -ESHUTDOWN)) {
608 /* we are killed - set a flag and wake the disconnect handler */
609 kaweth->end = 1;
610 wake_up(&kaweth->term_wait);
611 dev_dbg(dev, "Status was -ECONNRESET or -ESHUTDOWN.\n");
612 return;
613 }
614 if (unlikely(status == -EPROTO || status == -ETIME ||
615 status == -EILSEQ)) {
616 kaweth->stats.rx_errors++;
617 dev_dbg(dev, "Status was -EPROTO, -ETIME, or -EILSEQ.\n");
618 return;
619 }
620 if (unlikely(status == -EOVERFLOW)) {
621 kaweth->stats.rx_errors++;
622 dev_dbg(dev, "Status was -EOVERFLOW.\n");
623 }
624 spin_lock(&kaweth->device_lock);
625 if (IS_BLOCKED(kaweth->status)) {
626 spin_unlock(&kaweth->device_lock);
627 return;
628 }
629 spin_unlock(&kaweth->device_lock);
630
631 if(status && status != -EREMOTEIO && count != 1) {
632 dev_err(&kaweth->intf->dev,
633 "%s RX status: %d count: %d packet_len: %d\n",
634 net->name, status, count, (int)pkt_len);
635 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
636 return;
637 }
638
639 if(kaweth->net && (count > 2)) {
640 if(pkt_len > (count - 2)) {
641 dev_err(&kaweth->intf->dev,
642 "Packet length too long for USB frame (pkt_len: %x, count: %x)\n",
643 pkt_len, count);
644 dev_err(&kaweth->intf->dev, "Packet len & 2047: %x\n",
645 pkt_len & 2047);
646 dev_err(&kaweth->intf->dev, "Count 2: %x\n", count2);
647 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
648 return;
649 }
650
651 if(!(skb = dev_alloc_skb(pkt_len+2))) {
652 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
653 return;
654 }
655
656 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
657
658 skb_copy_to_linear_data(skb, kaweth->rx_buf + 2, pkt_len);
659
660 skb_put(skb, pkt_len);
661
662 skb->protocol = eth_type_trans(skb, net);
663
664 netif_rx(skb);
665
666 kaweth->stats.rx_packets++;
667 kaweth->stats.rx_bytes += pkt_len;
668 }
669
670 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
671 }
672
673 /****************************************************************
674 * kaweth_open
675 ****************************************************************/
676 static int kaweth_open(struct net_device *net)
677 {
678 struct kaweth_device *kaweth = netdev_priv(net);
679 int res;
680
681 res = usb_autopm_get_interface(kaweth->intf);
682 if (res) {
683 dev_err(&kaweth->intf->dev, "Interface cannot be resumed.\n");
684 return -EIO;
685 }
686 res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL);
687 if (res)
688 goto err_out;
689
690 usb_fill_int_urb(
691 kaweth->irq_urb,
692 kaweth->dev,
693 usb_rcvintpipe(kaweth->dev, 3),
694 kaweth->intbuffer,
695 INTBUFFERSIZE,
696 int_callback,
697 kaweth,
698 250); /* overriding the descriptor */
699 kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle;
700 kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
701
702 res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL);
703 if (res) {
704 usb_kill_urb(kaweth->rx_urb);
705 goto err_out;
706 }
707 kaweth->opened = 1;
708
709 netif_start_queue(net);
710
711 kaweth_async_set_rx_mode(kaweth);
712 return 0;
713
714 err_out:
715 usb_autopm_put_interface(kaweth->intf);
716 return -EIO;
717 }
718
719 /****************************************************************
720 * kaweth_kill_urbs
721 ****************************************************************/
722 static void kaweth_kill_urbs(struct kaweth_device *kaweth)
723 {
724 usb_kill_urb(kaweth->irq_urb);
725 usb_kill_urb(kaweth->rx_urb);
726 usb_kill_urb(kaweth->tx_urb);
727
728 cancel_delayed_work_sync(&kaweth->lowmem_work);
729
730 /* a scheduled work may have resubmitted,
731 we hit them again */
732 usb_kill_urb(kaweth->irq_urb);
733 usb_kill_urb(kaweth->rx_urb);
734 }
735
736 /****************************************************************
737 * kaweth_close
738 ****************************************************************/
739 static int kaweth_close(struct net_device *net)
740 {
741 struct kaweth_device *kaweth = netdev_priv(net);
742
743 netif_stop_queue(net);
744 kaweth->opened = 0;
745
746 kaweth->status |= KAWETH_STATUS_CLOSING;
747
748 kaweth_kill_urbs(kaweth);
749
750 kaweth->status &= ~KAWETH_STATUS_CLOSING;
751
752 usb_autopm_put_interface(kaweth->intf);
753
754 return 0;
755 }
756
757 static u32 kaweth_get_link(struct net_device *dev)
758 {
759 struct kaweth_device *kaweth = netdev_priv(dev);
760
761 return kaweth->linkstate;
762 }
763
764 static const struct ethtool_ops ops = {
765 .get_link = kaweth_get_link
766 };
767
768 /****************************************************************
769 * kaweth_usb_transmit_complete
770 ****************************************************************/
771 static void kaweth_usb_transmit_complete(struct urb *urb)
772 {
773 struct kaweth_device *kaweth = urb->context;
774 struct sk_buff *skb = kaweth->tx_skb;
775 int status = urb->status;
776
777 if (unlikely(status != 0))
778 if (status != -ENOENT)
779 dev_dbg(&urb->dev->dev, "%s: TX status %d.\n",
780 kaweth->net->name, status);
781
782 netif_wake_queue(kaweth->net);
783 dev_kfree_skb_irq(skb);
784 }
785
786 /****************************************************************
787 * kaweth_start_xmit
788 ****************************************************************/
789 static netdev_tx_t kaweth_start_xmit(struct sk_buff *skb,
790 struct net_device *net)
791 {
792 struct kaweth_device *kaweth = netdev_priv(net);
793 __le16 *private_header;
794
795 int res;
796
797 spin_lock_irq(&kaweth->device_lock);
798
799 kaweth_async_set_rx_mode(kaweth);
800 netif_stop_queue(net);
801 if (IS_BLOCKED(kaweth->status)) {
802 goto skip;
803 }
804
805 /* We now decide whether we can put our special header into the sk_buff */
806 if (skb_cloned(skb) || skb_headroom(skb) < 2) {
807 /* no such luck - we make our own */
808 struct sk_buff *copied_skb;
809 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC);
810 dev_kfree_skb_irq(skb);
811 skb = copied_skb;
812 if (!copied_skb) {
813 kaweth->stats.tx_errors++;
814 netif_start_queue(net);
815 spin_unlock_irq(&kaweth->device_lock);
816 return NETDEV_TX_OK;
817 }
818 }
819
820 private_header = (__le16 *)__skb_push(skb, 2);
821 *private_header = cpu_to_le16(skb->len-2);
822 kaweth->tx_skb = skb;
823
824 usb_fill_bulk_urb(kaweth->tx_urb,
825 kaweth->dev,
826 usb_sndbulkpipe(kaweth->dev, 2),
827 private_header,
828 skb->len,
829 kaweth_usb_transmit_complete,
830 kaweth);
831 kaweth->end = 0;
832
833 if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
834 {
835 dev_warn(&net->dev, "kaweth failed tx_urb %d\n", res);
836 skip:
837 kaweth->stats.tx_errors++;
838
839 netif_start_queue(net);
840 dev_kfree_skb_irq(skb);
841 }
842 else
843 {
844 kaweth->stats.tx_packets++;
845 kaweth->stats.tx_bytes += skb->len;
846 }
847
848 spin_unlock_irq(&kaweth->device_lock);
849
850 return NETDEV_TX_OK;
851 }
852
853 /****************************************************************
854 * kaweth_set_rx_mode
855 ****************************************************************/
856 static void kaweth_set_rx_mode(struct net_device *net)
857 {
858 struct kaweth_device *kaweth = netdev_priv(net);
859
860 __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
861 KAWETH_PACKET_FILTER_BROADCAST |
862 KAWETH_PACKET_FILTER_MULTICAST;
863
864 netdev_dbg(net, "Setting Rx mode to %d\n", packet_filter_bitmap);
865
866 netif_stop_queue(net);
867
868 if (net->flags & IFF_PROMISC) {
869 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
870 }
871 else if (!netdev_mc_empty(net) || (net->flags & IFF_ALLMULTI)) {
872 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
873 }
874
875 kaweth->packet_filter_bitmap = packet_filter_bitmap;
876 netif_wake_queue(net);
877 }
878
879 /****************************************************************
880 * kaweth_async_set_rx_mode
881 ****************************************************************/
882 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
883 {
884 int result;
885 __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
886
887 kaweth->packet_filter_bitmap = 0;
888 if (packet_filter_bitmap == 0)
889 return;
890
891 if (in_interrupt())
892 return;
893
894 result = kaweth_control(kaweth,
895 usb_sndctrlpipe(kaweth->dev, 0),
896 KAWETH_COMMAND_SET_PACKET_FILTER,
897 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
898 packet_filter_bitmap,
899 0,
900 (void *)&kaweth->scratch,
901 0,
902 KAWETH_CONTROL_TIMEOUT);
903
904 if(result < 0) {
905 dev_err(&kaweth->intf->dev, "Failed to set Rx mode: %d\n",
906 result);
907 }
908 else {
909 netdev_dbg(kaweth->net, "Set Rx mode to %d\n",
910 packet_filter_bitmap);
911 }
912 }
913
914 /****************************************************************
915 * kaweth_netdev_stats
916 ****************************************************************/
917 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev)
918 {
919 struct kaweth_device *kaweth = netdev_priv(dev);
920 return &kaweth->stats;
921 }
922
923 /****************************************************************
924 * kaweth_tx_timeout
925 ****************************************************************/
926 static void kaweth_tx_timeout(struct net_device *net)
927 {
928 struct kaweth_device *kaweth = netdev_priv(net);
929
930 dev_warn(&net->dev, "%s: Tx timed out. Resetting.\n", net->name);
931 kaweth->stats.tx_errors++;
932 netif_trans_update(net);
933
934 usb_unlink_urb(kaweth->tx_urb);
935 }
936
937 /****************************************************************
938 * kaweth_suspend
939 ****************************************************************/
940 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message)
941 {
942 struct kaweth_device *kaweth = usb_get_intfdata(intf);
943 unsigned long flags;
944
945 spin_lock_irqsave(&kaweth->device_lock, flags);
946 kaweth->status |= KAWETH_STATUS_SUSPENDING;
947 spin_unlock_irqrestore(&kaweth->device_lock, flags);
948
949 kaweth_kill_urbs(kaweth);
950 return 0;
951 }
952
953 /****************************************************************
954 * kaweth_resume
955 ****************************************************************/
956 static int kaweth_resume(struct usb_interface *intf)
957 {
958 struct kaweth_device *kaweth = usb_get_intfdata(intf);
959 unsigned long flags;
960
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_rx_mode = kaweth_set_rx_mode,
984 .ndo_get_stats = kaweth_netdev_stats,
985 .ndo_change_mtu = eth_change_mtu,
986 .ndo_set_mac_address = eth_mac_addr,
987 .ndo_validate_addr = eth_validate_addr,
988 };
989
990 static int kaweth_probe(
991 struct usb_interface *intf,
992 const struct usb_device_id *id /* from id_table */
993 )
994 {
995 struct device *dev = &intf->dev;
996 struct usb_device *udev = interface_to_usbdev(intf);
997 struct kaweth_device *kaweth;
998 struct net_device *netdev;
999 const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
1000 int result = 0;
1001 int rv = -EIO;
1002
1003 dev_dbg(dev,
1004 "Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x\n",
1005 udev->devnum, le16_to_cpu(udev->descriptor.idVendor),
1006 le16_to_cpu(udev->descriptor.idProduct),
1007 le16_to_cpu(udev->descriptor.bcdDevice));
1008
1009 dev_dbg(dev, "Device at %p\n", udev);
1010
1011 dev_dbg(dev, "Descriptor length: %x type: %x\n",
1012 (int)udev->descriptor.bLength,
1013 (int)udev->descriptor.bDescriptorType);
1014
1015 netdev = alloc_etherdev(sizeof(*kaweth));
1016 if (!netdev)
1017 return -ENOMEM;
1018
1019 kaweth = netdev_priv(netdev);
1020 kaweth->dev = udev;
1021 kaweth->net = netdev;
1022 kaweth->intf = intf;
1023
1024 spin_lock_init(&kaweth->device_lock);
1025 init_waitqueue_head(&kaweth->term_wait);
1026
1027 dev_dbg(dev, "Resetting.\n");
1028
1029 kaweth_reset(kaweth);
1030
1031 /*
1032 * If high byte of bcdDevice is nonzero, firmware is already
1033 * downloaded. Don't try to do it again, or we'll hang the device.
1034 */
1035
1036 if (le16_to_cpu(udev->descriptor.bcdDevice) >> 8) {
1037 dev_info(dev, "Firmware present in device.\n");
1038 } else {
1039 /* Download the firmware */
1040 dev_info(dev, "Downloading firmware...\n");
1041 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
1042 if (!kaweth->firmware_buf) {
1043 rv = -ENOMEM;
1044 goto err_free_netdev;
1045 }
1046 if ((result = kaweth_download_firmware(kaweth,
1047 "kaweth/new_code.bin",
1048 100,
1049 2)) < 0) {
1050 dev_err(dev, "Error downloading firmware (%d)\n",
1051 result);
1052 goto err_fw;
1053 }
1054
1055 if ((result = kaweth_download_firmware(kaweth,
1056 "kaweth/new_code_fix.bin",
1057 100,
1058 3)) < 0) {
1059 dev_err(dev, "Error downloading firmware fix (%d)\n",
1060 result);
1061 goto err_fw;
1062 }
1063
1064 if ((result = kaweth_download_firmware(kaweth,
1065 "kaweth/trigger_code.bin",
1066 126,
1067 2)) < 0) {
1068 dev_err(dev, "Error downloading trigger code (%d)\n",
1069 result);
1070 goto err_fw;
1071
1072 }
1073
1074 if ((result = kaweth_download_firmware(kaweth,
1075 "kaweth/trigger_code_fix.bin",
1076 126,
1077 3)) < 0) {
1078 dev_err(dev, "Error downloading trigger code fix (%d)\n", result);
1079 goto err_fw;
1080 }
1081
1082
1083 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
1084 dev_err(dev, "Error triggering firmware (%d)\n", result);
1085 goto err_fw;
1086 }
1087
1088 /* Device will now disappear for a moment... */
1089 dev_info(dev, "Firmware loaded. I'll be back...\n");
1090 err_fw:
1091 free_page((unsigned long)kaweth->firmware_buf);
1092 free_netdev(netdev);
1093 return -EIO;
1094 }
1095
1096 result = kaweth_read_configuration(kaweth);
1097
1098 if(result < 0) {
1099 dev_err(dev, "Error reading configuration (%d), no net device created\n", result);
1100 goto err_free_netdev;
1101 }
1102
1103 dev_info(dev, "Statistics collection: %x\n", kaweth->configuration.statistics_mask);
1104 dev_info(dev, "Multicast filter limit: %x\n", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
1105 dev_info(dev, "MTU: %d\n", le16_to_cpu(kaweth->configuration.segment_size));
1106 dev_info(dev, "Read MAC address %pM\n", kaweth->configuration.hw_addr);
1107
1108 if(!memcmp(&kaweth->configuration.hw_addr,
1109 &bcast_addr,
1110 sizeof(bcast_addr))) {
1111 dev_err(dev, "Firmware not functioning properly, no net device created\n");
1112 goto err_free_netdev;
1113 }
1114
1115 if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
1116 dev_dbg(dev, "Error setting URB size\n");
1117 goto err_free_netdev;
1118 }
1119
1120 if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
1121 dev_err(dev, "Error setting SOFS wait\n");
1122 goto err_free_netdev;
1123 }
1124
1125 result = kaweth_set_receive_filter(kaweth,
1126 KAWETH_PACKET_FILTER_DIRECTED |
1127 KAWETH_PACKET_FILTER_BROADCAST |
1128 KAWETH_PACKET_FILTER_MULTICAST);
1129
1130 if(result < 0) {
1131 dev_err(dev, "Error setting receive filter\n");
1132 goto err_free_netdev;
1133 }
1134
1135 dev_dbg(dev, "Initializing net device.\n");
1136
1137 kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1138 if (!kaweth->tx_urb)
1139 goto err_free_netdev;
1140 kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1141 if (!kaweth->rx_urb)
1142 goto err_only_tx;
1143 kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1144 if (!kaweth->irq_urb)
1145 goto err_tx_and_rx;
1146
1147 kaweth->intbuffer = usb_alloc_coherent( kaweth->dev,
1148 INTBUFFERSIZE,
1149 GFP_KERNEL,
1150 &kaweth->intbufferhandle);
1151 if (!kaweth->intbuffer)
1152 goto err_tx_and_rx_and_irq;
1153 kaweth->rx_buf = usb_alloc_coherent( kaweth->dev,
1154 KAWETH_BUF_SIZE,
1155 GFP_KERNEL,
1156 &kaweth->rxbufferhandle);
1157 if (!kaweth->rx_buf)
1158 goto err_all_but_rxbuf;
1159
1160 memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr));
1161 memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr,
1162 sizeof(kaweth->configuration.hw_addr));
1163
1164 netdev->netdev_ops = &kaweth_netdev_ops;
1165 netdev->watchdog_timeo = KAWETH_TX_TIMEOUT;
1166 netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size);
1167 netdev->ethtool_ops = &ops;
1168
1169 /* kaweth is zeroed as part of alloc_netdev */
1170 INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl);
1171 usb_set_intfdata(intf, kaweth);
1172
1173 SET_NETDEV_DEV(netdev, dev);
1174 if (register_netdev(netdev) != 0) {
1175 dev_err(dev, "Error registering netdev.\n");
1176 goto err_intfdata;
1177 }
1178
1179 dev_info(dev, "kaweth interface created at %s\n",
1180 kaweth->net->name);
1181
1182 return 0;
1183
1184 err_intfdata:
1185 usb_set_intfdata(intf, NULL);
1186 usb_free_coherent(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1187 err_all_but_rxbuf:
1188 usb_free_coherent(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1189 err_tx_and_rx_and_irq:
1190 usb_free_urb(kaweth->irq_urb);
1191 err_tx_and_rx:
1192 usb_free_urb(kaweth->rx_urb);
1193 err_only_tx:
1194 usb_free_urb(kaweth->tx_urb);
1195 err_free_netdev:
1196 free_netdev(netdev);
1197
1198 return rv;
1199 }
1200
1201 /****************************************************************
1202 * kaweth_disconnect
1203 ****************************************************************/
1204 static void kaweth_disconnect(struct usb_interface *intf)
1205 {
1206 struct kaweth_device *kaweth = usb_get_intfdata(intf);
1207 struct net_device *netdev;
1208
1209 usb_set_intfdata(intf, NULL);
1210 if (!kaweth) {
1211 dev_warn(&intf->dev, "unregistering non-existent device\n");
1212 return;
1213 }
1214 netdev = kaweth->net;
1215
1216 netdev_dbg(kaweth->net, "Unregistering net device\n");
1217 unregister_netdev(netdev);
1218
1219 usb_free_urb(kaweth->rx_urb);
1220 usb_free_urb(kaweth->tx_urb);
1221 usb_free_urb(kaweth->irq_urb);
1222
1223 usb_free_coherent(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1224 usb_free_coherent(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1225
1226 free_netdev(netdev);
1227 }
1228
1229
1230 // FIXME this completion stuff is a modified clone of
1231 // an OLD version of some stuff in usb.c ...
1232 struct usb_api_data {
1233 wait_queue_head_t wqh;
1234 int done;
1235 };
1236
1237 /*-------------------------------------------------------------------*
1238 * completion handler for compatibility wrappers (sync control/bulk) *
1239 *-------------------------------------------------------------------*/
1240 static void usb_api_blocking_completion(struct urb *urb)
1241 {
1242 struct usb_api_data *awd = (struct usb_api_data *)urb->context;
1243
1244 awd->done=1;
1245 wake_up(&awd->wqh);
1246 }
1247
1248 /*-------------------------------------------------------------------*
1249 * COMPATIBILITY STUFF *
1250 *-------------------------------------------------------------------*/
1251
1252 // Starts urb and waits for completion or timeout
1253 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
1254 {
1255 struct usb_api_data awd;
1256 int status;
1257
1258 init_waitqueue_head(&awd.wqh);
1259 awd.done = 0;
1260
1261 urb->context = &awd;
1262 status = usb_submit_urb(urb, GFP_ATOMIC);
1263 if (status) {
1264 // something went wrong
1265 usb_free_urb(urb);
1266 return status;
1267 }
1268
1269 if (!wait_event_timeout(awd.wqh, awd.done, timeout)) {
1270 // timeout
1271 dev_warn(&urb->dev->dev, "usb_control/bulk_msg: timeout\n");
1272 usb_kill_urb(urb); // remove urb safely
1273 status = -ETIMEDOUT;
1274 }
1275 else {
1276 status = urb->status;
1277 }
1278
1279 if (actual_length) {
1280 *actual_length = urb->actual_length;
1281 }
1282
1283 usb_free_urb(urb);
1284 return status;
1285 }
1286
1287 /*-------------------------------------------------------------------*/
1288 // returns status (negative) or length (positive)
1289 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
1290 unsigned int pipe,
1291 struct usb_ctrlrequest *cmd, void *data,
1292 int len, int timeout)
1293 {
1294 struct urb *urb;
1295 int retv;
1296 int length = 0; /* shut up GCC */
1297
1298 urb = usb_alloc_urb(0, GFP_ATOMIC);
1299 if (!urb)
1300 return -ENOMEM;
1301
1302 usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data,
1303 len, usb_api_blocking_completion, NULL);
1304
1305 retv = usb_start_wait_urb(urb, timeout, &length);
1306 if (retv < 0) {
1307 return retv;
1308 }
1309 else {
1310 return length;
1311 }
1312 }
1313
1314 module_usb_driver(kaweth_driver);
Linux kernel - Deliverables
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