Loading...
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
103MODULE_AUTHOR("Michael Zappe <zapman@interlan.net>, Stephane Alnet <stephane@u-picardie.fr>, Brad Hards <bhards@bigpond.net.au> and Oliver Neukum <oliver@neukum.org>");
104MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver");
105MODULE_LICENSE("GPL");
106MODULE_FIRMWARE("kaweth/new_code.bin");
107MODULE_FIRMWARE("kaweth/new_code_fix.bin");
108MODULE_FIRMWARE("kaweth/trigger_code.bin");
109MODULE_FIRMWARE("kaweth/trigger_code_fix.bin");
110
111static const char driver_name[] = "kaweth";
112
113static int kaweth_probe(
114 struct usb_interface *intf,
115 const struct usb_device_id *id /* from id_table */
116 );
117static void kaweth_disconnect(struct usb_interface *intf);
118static 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);
122static int kaweth_suspend(struct usb_interface *intf, pm_message_t message);
123static int kaweth_resume(struct usb_interface *intf);
124
125/****************************************************************
126 * usb_device_id
127 ****************************************************************/
128static 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
167MODULE_DEVICE_TABLE (usb, usb_klsi_table);
168
169/****************************************************************
170 * kaweth_driver
171 ****************************************************************/
172static 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
183typedef __u8 eth_addr_t[6];
184
185/****************************************************************
186 * usb_eth_dev
187 ****************************************************************/
188struct 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 ****************************************************************/
199struct 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 ****************************************************************/
214struct 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 ****************************************************************/
255static 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 netdev_dbg(kaweth->net, "kaweth_control()\n");
269
270 if(in_interrupt()) {
271 netdev_dbg(kaweth->net, "in_interrupt()\n");
272 return -EBUSY;
273 }
274
275 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
276 if (!dr)
277 return -ENOMEM;
278
279 dr->bRequestType = requesttype;
280 dr->bRequest = request;
281 dr->wValue = cpu_to_le16(value);
282 dr->wIndex = cpu_to_le16(index);
283 dr->wLength = cpu_to_le16(size);
284
285 retval = kaweth_internal_control_msg(kaweth->dev,
286 pipe,
287 dr,
288 data,
289 size,
290 timeout);
291
292 kfree(dr);
293 return retval;
294}
295
296/****************************************************************
297 * kaweth_read_configuration
298 ****************************************************************/
299static int kaweth_read_configuration(struct kaweth_device *kaweth)
300{
301 int retval;
302
303 netdev_dbg(kaweth->net, "Reading kaweth configuration\n");
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 ****************************************************************/
321static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size)
322{
323 int retval;
324
325 netdev_dbg(kaweth->net, "Setting URB size to %d\n", (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 ****************************************************************/
343static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait)
344{
345 int retval;
346
347 netdev_dbg(kaweth->net, "Set SOFS wait to %d\n", (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 ****************************************************************/
365static int kaweth_set_receive_filter(struct kaweth_device *kaweth,
366 __u16 receive_filter)
367{
368 int retval;
369
370 netdev_dbg(kaweth->net, "Set receive filter to %d\n",
371 (unsigned)receive_filter);
372
373 retval = kaweth_control(kaweth,
374 usb_sndctrlpipe(kaweth->dev, 0),
375 KAWETH_COMMAND_SET_PACKET_FILTER,
376 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
377 receive_filter,
378 0,
379 (void *)&kaweth->scratch,
380 0,
381 KAWETH_CONTROL_TIMEOUT);
382
383 return retval;
384}
385
386/****************************************************************
387 * kaweth_download_firmware
388 ****************************************************************/
389static int kaweth_download_firmware(struct kaweth_device *kaweth,
390 const char *fwname,
391 __u8 interrupt,
392 __u8 type)
393{
394 const struct firmware *fw;
395 int data_len;
396 int ret;
397
398 ret = request_firmware(&fw, fwname, &kaweth->dev->dev);
399 if (ret) {
400 dev_err(&kaweth->intf->dev, "Firmware request failed\n");
401 return ret;
402 }
403
404 if (fw->size > KAWETH_FIRMWARE_BUF_SIZE) {
405 dev_err(&kaweth->intf->dev, "Firmware too big: %zu\n",
406 fw->size);
407 release_firmware(fw);
408 return -ENOSPC;
409 }
410 data_len = fw->size;
411 memcpy(kaweth->firmware_buf, fw->data, fw->size);
412
413 release_firmware(fw);
414
415 kaweth->firmware_buf[2] = (data_len & 0xFF) - 7;
416 kaweth->firmware_buf[3] = data_len >> 8;
417 kaweth->firmware_buf[4] = type;
418 kaweth->firmware_buf[5] = interrupt;
419
420 netdev_dbg(kaweth->net, "High: %i, Low:%i\n", kaweth->firmware_buf[3],
421 kaweth->firmware_buf[2]);
422
423 netdev_dbg(kaweth->net,
424 "Downloading firmware at %p to kaweth device at %p\n",
425 kaweth->firmware_buf, kaweth);
426 netdev_dbg(kaweth->net, "Firmware length: %d\n", 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 ****************************************************************/
442static 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 netdev_dbg(kaweth->net, "Triggering firmware\n");
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 ****************************************************************/
470static int kaweth_reset(struct kaweth_device *kaweth)
471{
472 int result;
473
474 netdev_dbg(kaweth->net, "kaweth_reset(%p)\n", kaweth);
475 result = usb_reset_configuration(kaweth->dev);
476 mdelay(10);
477
478 netdev_dbg(kaweth->net, "kaweth_reset() returns %d.\n", result);
479
480 return result;
481}
482
483static void kaweth_usb_receive(struct urb *);
484static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t);
485
486/****************************************************************
487 int_callback
488*****************************************************************/
489
490static 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 dev_err(&kaweth->intf->dev,
504 "can't resubmit intr, %s-%s, status %d\n",
505 kaweth->dev->bus->bus_name,
506 kaweth->dev->devpath, status);
507}
508
509static void int_callback(struct urb *u)
510{
511 struct kaweth_device *kaweth = u->context;
512 int act_state;
513 int status = u->status;
514
515 switch (status) {
516 case 0: /* success */
517 break;
518 case -ECONNRESET: /* unlink */
519 case -ENOENT:
520 case -ESHUTDOWN:
521 return;
522 /* -EPIPE: should clear the halt */
523 default: /* error */
524 goto resubmit;
525 }
526
527 /* we check the link state to report changes */
528 if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) {
529 if (act_state)
530 netif_carrier_on(kaweth->net);
531 else
532 netif_carrier_off(kaweth->net);
533
534 kaweth->linkstate = act_state;
535 }
536resubmit:
537 kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC);
538}
539
540static void kaweth_resubmit_tl(struct work_struct *work)
541{
542 struct kaweth_device *kaweth =
543 container_of(work, struct kaweth_device, lowmem_work.work);
544
545 if (IS_BLOCKED(kaweth->status))
546 return;
547
548 if (kaweth->suspend_lowmem_rx)
549 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
550
551 if (kaweth->suspend_lowmem_ctrl)
552 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
553}
554
555
556/****************************************************************
557 * kaweth_resubmit_rx_urb
558 ****************************************************************/
559static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth,
560 gfp_t mem_flags)
561{
562 int result;
563
564 usb_fill_bulk_urb(kaweth->rx_urb,
565 kaweth->dev,
566 usb_rcvbulkpipe(kaweth->dev, 1),
567 kaweth->rx_buf,
568 KAWETH_BUF_SIZE,
569 kaweth_usb_receive,
570 kaweth);
571 kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
572 kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle;
573
574 if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) {
575 if (result == -ENOMEM) {
576 kaweth->suspend_lowmem_rx = 1;
577 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
578 }
579 dev_err(&kaweth->intf->dev, "resubmitting rx_urb %d failed\n",
580 result);
581 } else {
582 kaweth->suspend_lowmem_rx = 0;
583 }
584
585 return result;
586}
587
588static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth);
589
590/****************************************************************
591 * kaweth_usb_receive
592 ****************************************************************/
593static void kaweth_usb_receive(struct urb *urb)
594{
595 struct device *dev = &urb->dev->dev;
596 struct kaweth_device *kaweth = urb->context;
597 struct net_device *net = kaweth->net;
598 int status = urb->status;
599
600 int count = urb->actual_length;
601 int count2 = urb->transfer_buffer_length;
602
603 __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf);
604
605 struct sk_buff *skb;
606
607 if (unlikely(status == -EPIPE)) {
608 kaweth->stats.rx_errors++;
609 kaweth->end = 1;
610 wake_up(&kaweth->term_wait);
611 dev_dbg(dev, "Status was -EPIPE.\n");
612 return;
613 }
614 if (unlikely(status == -ECONNRESET || status == -ESHUTDOWN)) {
615 /* we are killed - set a flag and wake the disconnect handler */
616 kaweth->end = 1;
617 wake_up(&kaweth->term_wait);
618 dev_dbg(dev, "Status was -ECONNRESET or -ESHUTDOWN.\n");
619 return;
620 }
621 if (unlikely(status == -EPROTO || status == -ETIME ||
622 status == -EILSEQ)) {
623 kaweth->stats.rx_errors++;
624 dev_dbg(dev, "Status was -EPROTO, -ETIME, or -EILSEQ.\n");
625 return;
626 }
627 if (unlikely(status == -EOVERFLOW)) {
628 kaweth->stats.rx_errors++;
629 dev_dbg(dev, "Status was -EOVERFLOW.\n");
630 }
631 spin_lock(&kaweth->device_lock);
632 if (IS_BLOCKED(kaweth->status)) {
633 spin_unlock(&kaweth->device_lock);
634 return;
635 }
636 spin_unlock(&kaweth->device_lock);
637
638 if(status && status != -EREMOTEIO && count != 1) {
639 dev_err(&kaweth->intf->dev,
640 "%s RX status: %d count: %d packet_len: %d\n",
641 net->name, status, count, (int)pkt_len);
642 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
643 return;
644 }
645
646 if(kaweth->net && (count > 2)) {
647 if(pkt_len > (count - 2)) {
648 dev_err(&kaweth->intf->dev,
649 "Packet length too long for USB frame (pkt_len: %x, count: %x)\n",
650 pkt_len, count);
651 dev_err(&kaweth->intf->dev, "Packet len & 2047: %x\n",
652 pkt_len & 2047);
653 dev_err(&kaweth->intf->dev, "Count 2: %x\n", count2);
654 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
655 return;
656 }
657
658 if(!(skb = dev_alloc_skb(pkt_len+2))) {
659 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
660 return;
661 }
662
663 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
664
665 skb_copy_to_linear_data(skb, kaweth->rx_buf + 2, pkt_len);
666
667 skb_put(skb, pkt_len);
668
669 skb->protocol = eth_type_trans(skb, net);
670
671 netif_rx(skb);
672
673 kaweth->stats.rx_packets++;
674 kaweth->stats.rx_bytes += pkt_len;
675 }
676
677 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
678}
679
680/****************************************************************
681 * kaweth_open
682 ****************************************************************/
683static int kaweth_open(struct net_device *net)
684{
685 struct kaweth_device *kaweth = netdev_priv(net);
686 int res;
687
688 netdev_dbg(kaweth->net, "Opening network device.\n");
689
690 res = usb_autopm_get_interface(kaweth->intf);
691 if (res) {
692 dev_err(&kaweth->intf->dev, "Interface cannot be resumed.\n");
693 return -EIO;
694 }
695 res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL);
696 if (res)
697 goto err_out;
698
699 usb_fill_int_urb(
700 kaweth->irq_urb,
701 kaweth->dev,
702 usb_rcvintpipe(kaweth->dev, 3),
703 kaweth->intbuffer,
704 INTBUFFERSIZE,
705 int_callback,
706 kaweth,
707 250); /* overriding the descriptor */
708 kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle;
709 kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
710
711 res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL);
712 if (res) {
713 usb_kill_urb(kaweth->rx_urb);
714 goto err_out;
715 }
716 kaweth->opened = 1;
717
718 netif_start_queue(net);
719
720 kaweth_async_set_rx_mode(kaweth);
721 return 0;
722
723err_out:
724 usb_autopm_put_interface(kaweth->intf);
725 return -EIO;
726}
727
728/****************************************************************
729 * kaweth_kill_urbs
730 ****************************************************************/
731static void kaweth_kill_urbs(struct kaweth_device *kaweth)
732{
733 usb_kill_urb(kaweth->irq_urb);
734 usb_kill_urb(kaweth->rx_urb);
735 usb_kill_urb(kaweth->tx_urb);
736
737 cancel_delayed_work_sync(&kaweth->lowmem_work);
738
739 /* a scheduled work may have resubmitted,
740 we hit them again */
741 usb_kill_urb(kaweth->irq_urb);
742 usb_kill_urb(kaweth->rx_urb);
743}
744
745/****************************************************************
746 * kaweth_close
747 ****************************************************************/
748static int kaweth_close(struct net_device *net)
749{
750 struct kaweth_device *kaweth = netdev_priv(net);
751
752 netif_stop_queue(net);
753 kaweth->opened = 0;
754
755 kaweth->status |= KAWETH_STATUS_CLOSING;
756
757 kaweth_kill_urbs(kaweth);
758
759 kaweth->status &= ~KAWETH_STATUS_CLOSING;
760
761 usb_autopm_put_interface(kaweth->intf);
762
763 return 0;
764}
765
766static u32 kaweth_get_link(struct net_device *dev)
767{
768 struct kaweth_device *kaweth = netdev_priv(dev);
769
770 return kaweth->linkstate;
771}
772
773static const struct ethtool_ops ops = {
774 .get_link = kaweth_get_link
775};
776
777/****************************************************************
778 * kaweth_usb_transmit_complete
779 ****************************************************************/
780static void kaweth_usb_transmit_complete(struct urb *urb)
781{
782 struct kaweth_device *kaweth = urb->context;
783 struct sk_buff *skb = kaweth->tx_skb;
784 int status = urb->status;
785
786 if (unlikely(status != 0))
787 if (status != -ENOENT)
788 dev_dbg(&urb->dev->dev, "%s: TX status %d.\n",
789 kaweth->net->name, status);
790
791 netif_wake_queue(kaweth->net);
792 dev_kfree_skb_irq(skb);
793}
794
795/****************************************************************
796 * kaweth_start_xmit
797 ****************************************************************/
798static netdev_tx_t kaweth_start_xmit(struct sk_buff *skb,
799 struct net_device *net)
800{
801 struct kaweth_device *kaweth = netdev_priv(net);
802 __le16 *private_header;
803
804 int res;
805
806 spin_lock_irq(&kaweth->device_lock);
807
808 kaweth_async_set_rx_mode(kaweth);
809 netif_stop_queue(net);
810 if (IS_BLOCKED(kaweth->status)) {
811 goto skip;
812 }
813
814 /* We now decide whether we can put our special header into the sk_buff */
815 if (skb_cloned(skb) || skb_headroom(skb) < 2) {
816 /* no such luck - we make our own */
817 struct sk_buff *copied_skb;
818 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC);
819 dev_kfree_skb_irq(skb);
820 skb = copied_skb;
821 if (!copied_skb) {
822 kaweth->stats.tx_errors++;
823 netif_start_queue(net);
824 spin_unlock_irq(&kaweth->device_lock);
825 return NETDEV_TX_OK;
826 }
827 }
828
829 private_header = (__le16 *)__skb_push(skb, 2);
830 *private_header = cpu_to_le16(skb->len-2);
831 kaweth->tx_skb = skb;
832
833 usb_fill_bulk_urb(kaweth->tx_urb,
834 kaweth->dev,
835 usb_sndbulkpipe(kaweth->dev, 2),
836 private_header,
837 skb->len,
838 kaweth_usb_transmit_complete,
839 kaweth);
840 kaweth->end = 0;
841
842 if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
843 {
844 dev_warn(&net->dev, "kaweth failed tx_urb %d\n", res);
845skip:
846 kaweth->stats.tx_errors++;
847
848 netif_start_queue(net);
849 dev_kfree_skb_irq(skb);
850 }
851 else
852 {
853 kaweth->stats.tx_packets++;
854 kaweth->stats.tx_bytes += skb->len;
855 }
856
857 spin_unlock_irq(&kaweth->device_lock);
858
859 return NETDEV_TX_OK;
860}
861
862/****************************************************************
863 * kaweth_set_rx_mode
864 ****************************************************************/
865static void kaweth_set_rx_mode(struct net_device *net)
866{
867 struct kaweth_device *kaweth = netdev_priv(net);
868
869 __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
870 KAWETH_PACKET_FILTER_BROADCAST |
871 KAWETH_PACKET_FILTER_MULTICAST;
872
873 netdev_dbg(net, "Setting Rx mode to %d\n", packet_filter_bitmap);
874
875 netif_stop_queue(net);
876
877 if (net->flags & IFF_PROMISC) {
878 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
879 }
880 else if (!netdev_mc_empty(net) || (net->flags & IFF_ALLMULTI)) {
881 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
882 }
883
884 kaweth->packet_filter_bitmap = packet_filter_bitmap;
885 netif_wake_queue(net);
886}
887
888/****************************************************************
889 * kaweth_async_set_rx_mode
890 ****************************************************************/
891static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
892{
893 int result;
894 __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
895
896 kaweth->packet_filter_bitmap = 0;
897 if (packet_filter_bitmap == 0)
898 return;
899
900 if (in_interrupt())
901 return;
902
903 result = kaweth_control(kaweth,
904 usb_sndctrlpipe(kaweth->dev, 0),
905 KAWETH_COMMAND_SET_PACKET_FILTER,
906 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
907 packet_filter_bitmap,
908 0,
909 (void *)&kaweth->scratch,
910 0,
911 KAWETH_CONTROL_TIMEOUT);
912
913 if(result < 0) {
914 dev_err(&kaweth->intf->dev, "Failed to set Rx mode: %d\n",
915 result);
916 }
917 else {
918 netdev_dbg(kaweth->net, "Set Rx mode to %d\n",
919 packet_filter_bitmap);
920 }
921}
922
923/****************************************************************
924 * kaweth_netdev_stats
925 ****************************************************************/
926static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev)
927{
928 struct kaweth_device *kaweth = netdev_priv(dev);
929 return &kaweth->stats;
930}
931
932/****************************************************************
933 * kaweth_tx_timeout
934 ****************************************************************/
935static void kaweth_tx_timeout(struct net_device *net)
936{
937 struct kaweth_device *kaweth = netdev_priv(net);
938
939 dev_warn(&net->dev, "%s: Tx timed out. Resetting.\n", net->name);
940 kaweth->stats.tx_errors++;
941 net->trans_start = jiffies;
942
943 usb_unlink_urb(kaweth->tx_urb);
944}
945
946/****************************************************************
947 * kaweth_suspend
948 ****************************************************************/
949static int kaweth_suspend(struct usb_interface *intf, pm_message_t message)
950{
951 struct kaweth_device *kaweth = usb_get_intfdata(intf);
952 unsigned long flags;
953
954 dev_dbg(&intf->dev, "Suspending device\n");
955 spin_lock_irqsave(&kaweth->device_lock, flags);
956 kaweth->status |= KAWETH_STATUS_SUSPENDING;
957 spin_unlock_irqrestore(&kaweth->device_lock, flags);
958
959 kaweth_kill_urbs(kaweth);
960 return 0;
961}
962
963/****************************************************************
964 * kaweth_resume
965 ****************************************************************/
966static int kaweth_resume(struct usb_interface *intf)
967{
968 struct kaweth_device *kaweth = usb_get_intfdata(intf);
969 unsigned long flags;
970
971 dev_dbg(&intf->dev, "Resuming device\n");
972 spin_lock_irqsave(&kaweth->device_lock, flags);
973 kaweth->status &= ~KAWETH_STATUS_SUSPENDING;
974 spin_unlock_irqrestore(&kaweth->device_lock, flags);
975
976 if (!kaweth->opened)
977 return 0;
978 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
979 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
980
981 return 0;
982}
983
984/****************************************************************
985 * kaweth_probe
986 ****************************************************************/
987
988
989static const struct net_device_ops kaweth_netdev_ops = {
990 .ndo_open = kaweth_open,
991 .ndo_stop = kaweth_close,
992 .ndo_start_xmit = kaweth_start_xmit,
993 .ndo_tx_timeout = kaweth_tx_timeout,
994 .ndo_set_rx_mode = kaweth_set_rx_mode,
995 .ndo_get_stats = kaweth_netdev_stats,
996 .ndo_change_mtu = eth_change_mtu,
997 .ndo_set_mac_address = eth_mac_addr,
998 .ndo_validate_addr = eth_validate_addr,
999};
1000
1001static int kaweth_probe(
1002 struct usb_interface *intf,
1003 const struct usb_device_id *id /* from id_table */
1004 )
1005{
1006 struct device *dev = &intf->dev;
1007 struct usb_device *udev = interface_to_usbdev(intf);
1008 struct kaweth_device *kaweth;
1009 struct net_device *netdev;
1010 const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
1011 int result = 0;
1012
1013 dev_dbg(dev,
1014 "Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x\n",
1015 udev->devnum, le16_to_cpu(udev->descriptor.idVendor),
1016 le16_to_cpu(udev->descriptor.idProduct),
1017 le16_to_cpu(udev->descriptor.bcdDevice));
1018
1019 dev_dbg(dev, "Device at %p\n", udev);
1020
1021 dev_dbg(dev, "Descriptor length: %x type: %x\n",
1022 (int)udev->descriptor.bLength,
1023 (int)udev->descriptor.bDescriptorType);
1024
1025 netdev = alloc_etherdev(sizeof(*kaweth));
1026 if (!netdev)
1027 return -ENOMEM;
1028
1029 kaweth = netdev_priv(netdev);
1030 kaweth->dev = udev;
1031 kaweth->net = netdev;
1032
1033 spin_lock_init(&kaweth->device_lock);
1034 init_waitqueue_head(&kaweth->term_wait);
1035
1036 dev_dbg(dev, "Resetting.\n");
1037
1038 kaweth_reset(kaweth);
1039
1040 /*
1041 * If high byte of bcdDevice is nonzero, firmware is already
1042 * downloaded. Don't try to do it again, or we'll hang the device.
1043 */
1044
1045 if (le16_to_cpu(udev->descriptor.bcdDevice) >> 8) {
1046 dev_info(dev, "Firmware present in device.\n");
1047 } else {
1048 /* Download the firmware */
1049 dev_info(dev, "Downloading firmware...\n");
1050 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
1051 if ((result = kaweth_download_firmware(kaweth,
1052 "kaweth/new_code.bin",
1053 100,
1054 2)) < 0) {
1055 dev_err(dev, "Error downloading firmware (%d)\n",
1056 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 dev_err(dev, "Error downloading firmware fix (%d)\n",
1065 result);
1066 goto err_fw;
1067 }
1068
1069 if ((result = kaweth_download_firmware(kaweth,
1070 "kaweth/trigger_code.bin",
1071 126,
1072 2)) < 0) {
1073 dev_err(dev, "Error downloading trigger code (%d)\n",
1074 result);
1075 goto err_fw;
1076
1077 }
1078
1079 if ((result = kaweth_download_firmware(kaweth,
1080 "kaweth/trigger_code_fix.bin",
1081 126,
1082 3)) < 0) {
1083 dev_err(dev, "Error downloading trigger code fix (%d)\n", result);
1084 goto err_fw;
1085 }
1086
1087
1088 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
1089 dev_err(dev, "Error triggering firmware (%d)\n", result);
1090 goto err_fw;
1091 }
1092
1093 /* Device will now disappear for a moment... */
1094 dev_info(dev, "Firmware loaded. I'll be back...\n");
1095err_fw:
1096 free_page((unsigned long)kaweth->firmware_buf);
1097 free_netdev(netdev);
1098 return -EIO;
1099 }
1100
1101 result = kaweth_read_configuration(kaweth);
1102
1103 if(result < 0) {
1104 dev_err(dev, "Error reading configuration (%d), no net device created\n", result);
1105 goto err_free_netdev;
1106 }
1107
1108 dev_info(dev, "Statistics collection: %x\n", kaweth->configuration.statistics_mask);
1109 dev_info(dev, "Multicast filter limit: %x\n", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
1110 dev_info(dev, "MTU: %d\n", le16_to_cpu(kaweth->configuration.segment_size));
1111 dev_info(dev, "Read MAC address %pM\n", kaweth->configuration.hw_addr);
1112
1113 if(!memcmp(&kaweth->configuration.hw_addr,
1114 &bcast_addr,
1115 sizeof(bcast_addr))) {
1116 dev_err(dev, "Firmware not functioning properly, no net device created\n");
1117 goto err_free_netdev;
1118 }
1119
1120 if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
1121 dev_dbg(dev, "Error setting URB size\n");
1122 goto err_free_netdev;
1123 }
1124
1125 if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
1126 dev_err(dev, "Error setting SOFS wait\n");
1127 goto err_free_netdev;
1128 }
1129
1130 result = kaweth_set_receive_filter(kaweth,
1131 KAWETH_PACKET_FILTER_DIRECTED |
1132 KAWETH_PACKET_FILTER_BROADCAST |
1133 KAWETH_PACKET_FILTER_MULTICAST);
1134
1135 if(result < 0) {
1136 dev_err(dev, "Error setting receive filter\n");
1137 goto err_free_netdev;
1138 }
1139
1140 dev_dbg(dev, "Initializing net device.\n");
1141
1142 kaweth->intf = intf;
1143
1144 kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1145 if (!kaweth->tx_urb)
1146 goto err_free_netdev;
1147 kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1148 if (!kaweth->rx_urb)
1149 goto err_only_tx;
1150 kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1151 if (!kaweth->irq_urb)
1152 goto err_tx_and_rx;
1153
1154 kaweth->intbuffer = usb_alloc_coherent( kaweth->dev,
1155 INTBUFFERSIZE,
1156 GFP_KERNEL,
1157 &kaweth->intbufferhandle);
1158 if (!kaweth->intbuffer)
1159 goto err_tx_and_rx_and_irq;
1160 kaweth->rx_buf = usb_alloc_coherent( kaweth->dev,
1161 KAWETH_BUF_SIZE,
1162 GFP_KERNEL,
1163 &kaweth->rxbufferhandle);
1164 if (!kaweth->rx_buf)
1165 goto err_all_but_rxbuf;
1166
1167 memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr));
1168 memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr,
1169 sizeof(kaweth->configuration.hw_addr));
1170
1171 netdev->netdev_ops = &kaweth_netdev_ops;
1172 netdev->watchdog_timeo = KAWETH_TX_TIMEOUT;
1173 netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size);
1174 SET_ETHTOOL_OPS(netdev, &ops);
1175
1176 /* kaweth is zeroed as part of alloc_netdev */
1177 INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl);
1178 usb_set_intfdata(intf, kaweth);
1179
1180#if 0
1181// dma_supported() is deeply broken on almost all architectures
1182 if (dma_supported (dev, 0xffffffffffffffffULL))
1183 kaweth->net->features |= NETIF_F_HIGHDMA;
1184#endif
1185
1186 SET_NETDEV_DEV(netdev, dev);
1187 if (register_netdev(netdev) != 0) {
1188 dev_err(dev, "Error registering netdev.\n");
1189 goto err_intfdata;
1190 }
1191
1192 dev_info(dev, "kaweth interface created at %s\n",
1193 kaweth->net->name);
1194
1195 dev_dbg(dev, "Kaweth probe returning.\n");
1196
1197 return 0;
1198
1199err_intfdata:
1200 usb_set_intfdata(intf, NULL);
1201 usb_free_coherent(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1202err_all_but_rxbuf:
1203 usb_free_coherent(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1204err_tx_and_rx_and_irq:
1205 usb_free_urb(kaweth->irq_urb);
1206err_tx_and_rx:
1207 usb_free_urb(kaweth->rx_urb);
1208err_only_tx:
1209 usb_free_urb(kaweth->tx_urb);
1210err_free_netdev:
1211 free_netdev(netdev);
1212
1213 return -EIO;
1214}
1215
1216/****************************************************************
1217 * kaweth_disconnect
1218 ****************************************************************/
1219static void kaweth_disconnect(struct usb_interface *intf)
1220{
1221 struct kaweth_device *kaweth = usb_get_intfdata(intf);
1222 struct net_device *netdev;
1223
1224 dev_info(&intf->dev, "Unregistering\n");
1225
1226 usb_set_intfdata(intf, NULL);
1227 if (!kaweth) {
1228 dev_warn(&intf->dev, "unregistering non-existent device\n");
1229 return;
1230 }
1231 netdev = kaweth->net;
1232
1233 netdev_dbg(kaweth->net, "Unregistering net device\n");
1234 unregister_netdev(netdev);
1235
1236 usb_free_urb(kaweth->rx_urb);
1237 usb_free_urb(kaweth->tx_urb);
1238 usb_free_urb(kaweth->irq_urb);
1239
1240 usb_free_coherent(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1241 usb_free_coherent(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1242
1243 free_netdev(netdev);
1244}
1245
1246
1247// FIXME this completion stuff is a modified clone of
1248// an OLD version of some stuff in usb.c ...
1249struct usb_api_data {
1250 wait_queue_head_t wqh;
1251 int done;
1252};
1253
1254/*-------------------------------------------------------------------*
1255 * completion handler for compatibility wrappers (sync control/bulk) *
1256 *-------------------------------------------------------------------*/
1257static void usb_api_blocking_completion(struct urb *urb)
1258{
1259 struct usb_api_data *awd = (struct usb_api_data *)urb->context;
1260
1261 awd->done=1;
1262 wake_up(&awd->wqh);
1263}
1264
1265/*-------------------------------------------------------------------*
1266 * COMPATIBILITY STUFF *
1267 *-------------------------------------------------------------------*/
1268
1269// Starts urb and waits for completion or timeout
1270static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
1271{
1272 struct usb_api_data awd;
1273 int status;
1274
1275 init_waitqueue_head(&awd.wqh);
1276 awd.done = 0;
1277
1278 urb->context = &awd;
1279 status = usb_submit_urb(urb, GFP_NOIO);
1280 if (status) {
1281 // something went wrong
1282 usb_free_urb(urb);
1283 return status;
1284 }
1285
1286 if (!wait_event_timeout(awd.wqh, awd.done, timeout)) {
1287 // timeout
1288 dev_warn(&urb->dev->dev, "usb_control/bulk_msg: timeout\n");
1289 usb_kill_urb(urb); // remove urb safely
1290 status = -ETIMEDOUT;
1291 }
1292 else {
1293 status = urb->status;
1294 }
1295
1296 if (actual_length) {
1297 *actual_length = urb->actual_length;
1298 }
1299
1300 usb_free_urb(urb);
1301 return status;
1302}
1303
1304/*-------------------------------------------------------------------*/
1305// returns status (negative) or length (positive)
1306static int kaweth_internal_control_msg(struct usb_device *usb_dev,
1307 unsigned int pipe,
1308 struct usb_ctrlrequest *cmd, void *data,
1309 int len, int timeout)
1310{
1311 struct urb *urb;
1312 int retv;
1313 int length = 0; /* shut up GCC */
1314
1315 urb = usb_alloc_urb(0, GFP_ATOMIC);
1316 if (!urb)
1317 return -ENOMEM;
1318
1319 usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data,
1320 len, usb_api_blocking_completion, NULL);
1321
1322 retv = usb_start_wait_urb(urb, timeout, &length);
1323 if (retv < 0) {
1324 return retv;
1325 }
1326 else {
1327 return length;
1328 }
1329}
1330
1331module_usb_driver(kaweth_driver);
1/****************************************************************
2 *
3 * kaweth.c - driver for KL5KUSB101 based USB->Ethernet
4 *
5 * (c) 2000 Interlan Communications
6 * (c) 2000 Stephane Alnet
7 * (C) 2001 Brad Hards
8 * (C) 2002 Oliver Neukum
9 *
10 * Original author: The Zapman <zapman@interlan.net>
11 * Inspired by, and much credit goes to Michael Rothwell
12 * <rothwell@interlan.net> for the test equipment, help, and patience
13 * Based off of (and with thanks to) Petko Manolov's pegaus.c driver.
14 * Also many thanks to Joel Silverman and Ed Surprenant at Kawasaki
15 * for providing the firmware and driver resources.
16 *
17 * This program is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU General Public License as
19 * published by the Free Software Foundation; either version 2, or
20 * (at your option) any later version.
21 *
22 * This program is distributed in the hope that it will be useful,
23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 * GNU General Public License for more details.
26 *
27 * You should have received a copy of the GNU General Public License
28 * along with this program; if not, write to the Free Software Foundation,
29 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
30 *
31 ****************************************************************/
32
33/* TODO:
34 * Develop test procedures for USB net interfaces
35 * Run test procedures
36 * Fix bugs from previous two steps
37 * Snoop other OSs for any tricks we're not doing
38 * Reduce arbitrary timeouts
39 * Smart multicast support
40 * Temporary MAC change support
41 * Tunable SOFs parameter - ioctl()?
42 * Ethernet stats collection
43 * Code formatting improvements
44 */
45
46#include <linux/module.h>
47#include <linux/slab.h>
48#include <linux/string.h>
49#include <linux/init.h>
50#include <linux/delay.h>
51#include <linux/netdevice.h>
52#include <linux/etherdevice.h>
53#include <linux/usb.h>
54#include <linux/types.h>
55#include <linux/ethtool.h>
56#include <linux/dma-mapping.h>
57#include <linux/wait.h>
58#include <linux/firmware.h>
59#include <asm/uaccess.h>
60#include <asm/byteorder.h>
61
62#undef DEBUG
63
64#define KAWETH_MTU 1514
65#define KAWETH_BUF_SIZE 1664
66#define KAWETH_TX_TIMEOUT (5 * HZ)
67#define KAWETH_SCRATCH_SIZE 32
68#define KAWETH_FIRMWARE_BUF_SIZE 4096
69#define KAWETH_CONTROL_TIMEOUT (30000)
70
71#define KAWETH_STATUS_BROKEN 0x0000001
72#define KAWETH_STATUS_CLOSING 0x0000002
73#define KAWETH_STATUS_SUSPENDING 0x0000004
74
75#define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING)
76
77#define KAWETH_PACKET_FILTER_PROMISCUOUS 0x01
78#define KAWETH_PACKET_FILTER_ALL_MULTICAST 0x02
79#define KAWETH_PACKET_FILTER_DIRECTED 0x04
80#define KAWETH_PACKET_FILTER_BROADCAST 0x08
81#define KAWETH_PACKET_FILTER_MULTICAST 0x10
82
83/* Table 7 */
84#define KAWETH_COMMAND_GET_ETHERNET_DESC 0x00
85#define KAWETH_COMMAND_MULTICAST_FILTERS 0x01
86#define KAWETH_COMMAND_SET_PACKET_FILTER 0x02
87#define KAWETH_COMMAND_STATISTICS 0x03
88#define KAWETH_COMMAND_SET_TEMP_MAC 0x06
89#define KAWETH_COMMAND_GET_TEMP_MAC 0x07
90#define KAWETH_COMMAND_SET_URB_SIZE 0x08
91#define KAWETH_COMMAND_SET_SOFS_WAIT 0x09
92#define KAWETH_COMMAND_SCAN 0xFF
93
94#define KAWETH_SOFS_TO_WAIT 0x05
95
96#define INTBUFFERSIZE 4
97
98#define STATE_OFFSET 0
99#define STATE_MASK 0x40
100#define STATE_SHIFT 5
101
102#define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED)
103
104
105MODULE_AUTHOR("Michael Zappe <zapman@interlan.net>, Stephane Alnet <stephane@u-picardie.fr>, Brad Hards <bhards@bigpond.net.au> and Oliver Neukum <oliver@neukum.org>");
106MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver");
107MODULE_LICENSE("GPL");
108MODULE_FIRMWARE("kaweth/new_code.bin");
109MODULE_FIRMWARE("kaweth/new_code_fix.bin");
110MODULE_FIRMWARE("kaweth/trigger_code.bin");
111MODULE_FIRMWARE("kaweth/trigger_code_fix.bin");
112
113static const char driver_name[] = "kaweth";
114
115static int kaweth_probe(
116 struct usb_interface *intf,
117 const struct usb_device_id *id /* from id_table */
118 );
119static void kaweth_disconnect(struct usb_interface *intf);
120static int kaweth_internal_control_msg(struct usb_device *usb_dev,
121 unsigned int pipe,
122 struct usb_ctrlrequest *cmd, void *data,
123 int len, int timeout);
124static int kaweth_suspend(struct usb_interface *intf, pm_message_t message);
125static int kaweth_resume(struct usb_interface *intf);
126
127/****************************************************************
128 * usb_device_id
129 ****************************************************************/
130static struct usb_device_id usb_klsi_table[] = {
131 { USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */
132 { USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */
133 { USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */
134 { USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */
135 { USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */
136 { USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */
137 { USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */
138 { USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */
139 { USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */
140 { USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */
141 { USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */
142 { USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */
143 { USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */
144 { USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */
145 { USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */
146 { USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */
147 { USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */
148 { USB_DEVICE(0x07c9, 0xb010) }, /* Allied Telesyn AT-USB10 USB Ethernet Adapter */
149 { USB_DEVICE(0x0846, 0x1001) }, /* NetGear EA-101 */
150 { USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */
151 { USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */
152 { USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */
153 { USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */
154 { USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */
155 { USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */
156 { USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */
157 { USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */
158 { USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */
159 { USB_DEVICE(0x1485, 0x0001) }, /* Silicom U2E */
160 { USB_DEVICE(0x1485, 0x0002) }, /* Psion Dacom Gold Port Ethernet */
161 { USB_DEVICE(0x1645, 0x0005) }, /* Entrega E45 */
162 { USB_DEVICE(0x1645, 0x0008) }, /* Entrega USB Ethernet Adapter */
163 { USB_DEVICE(0x1645, 0x8005) }, /* PortGear Ethernet Adapter */
164 { USB_DEVICE(0x1668, 0x0323) }, /* Actiontec USB Ethernet */
165 { USB_DEVICE(0x2001, 0x4000) }, /* D-link DSB-650C */
166 {} /* Null terminator */
167};
168
169MODULE_DEVICE_TABLE (usb, usb_klsi_table);
170
171/****************************************************************
172 * kaweth_driver
173 ****************************************************************/
174static struct usb_driver kaweth_driver = {
175 .name = driver_name,
176 .probe = kaweth_probe,
177 .disconnect = kaweth_disconnect,
178 .suspend = kaweth_suspend,
179 .resume = kaweth_resume,
180 .id_table = usb_klsi_table,
181 .supports_autosuspend = 1,
182 .disable_hub_initiated_lpm = 1,
183};
184
185typedef __u8 eth_addr_t[6];
186
187/****************************************************************
188 * usb_eth_dev
189 ****************************************************************/
190struct usb_eth_dev {
191 char *name;
192 __u16 vendor;
193 __u16 device;
194 void *pdata;
195};
196
197/****************************************************************
198 * kaweth_ethernet_configuration
199 * Refer Table 8
200 ****************************************************************/
201struct kaweth_ethernet_configuration
202{
203 __u8 size;
204 __u8 reserved1;
205 __u8 reserved2;
206 eth_addr_t hw_addr;
207 __u32 statistics_mask;
208 __le16 segment_size;
209 __u16 max_multicast_filters;
210 __u8 reserved3;
211} __packed;
212
213/****************************************************************
214 * kaweth_device
215 ****************************************************************/
216struct kaweth_device
217{
218 spinlock_t device_lock;
219
220 __u32 status;
221 int end;
222 int suspend_lowmem_rx;
223 int suspend_lowmem_ctrl;
224 int linkstate;
225 int opened;
226 struct delayed_work lowmem_work;
227
228 struct usb_device *dev;
229 struct usb_interface *intf;
230 struct net_device *net;
231 wait_queue_head_t term_wait;
232
233 struct urb *rx_urb;
234 struct urb *tx_urb;
235 struct urb *irq_urb;
236
237 dma_addr_t intbufferhandle;
238 __u8 *intbuffer;
239 dma_addr_t rxbufferhandle;
240 __u8 *rx_buf;
241
242
243 struct sk_buff *tx_skb;
244
245 __u8 *firmware_buf;
246 __u8 scratch[KAWETH_SCRATCH_SIZE];
247 __u16 packet_filter_bitmap;
248
249 struct kaweth_ethernet_configuration configuration;
250
251 struct net_device_stats stats;
252};
253
254/****************************************************************
255 * kaweth_control
256 ****************************************************************/
257static int kaweth_control(struct kaweth_device *kaweth,
258 unsigned int pipe,
259 __u8 request,
260 __u8 requesttype,
261 __u16 value,
262 __u16 index,
263 void *data,
264 __u16 size,
265 int timeout)
266{
267 struct usb_ctrlrequest *dr;
268 int retval;
269
270 dbg("kaweth_control()");
271
272 if(in_interrupt()) {
273 dbg("in_interrupt()");
274 return -EBUSY;
275 }
276
277 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
278
279 if (!dr) {
280 dbg("kmalloc() failed");
281 return -ENOMEM;
282 }
283
284 dr->bRequestType = requesttype;
285 dr->bRequest = request;
286 dr->wValue = cpu_to_le16(value);
287 dr->wIndex = cpu_to_le16(index);
288 dr->wLength = cpu_to_le16(size);
289
290 retval = kaweth_internal_control_msg(kaweth->dev,
291 pipe,
292 dr,
293 data,
294 size,
295 timeout);
296
297 kfree(dr);
298 return retval;
299}
300
301/****************************************************************
302 * kaweth_read_configuration
303 ****************************************************************/
304static int kaweth_read_configuration(struct kaweth_device *kaweth)
305{
306 int retval;
307
308 dbg("Reading kaweth configuration");
309
310 retval = kaweth_control(kaweth,
311 usb_rcvctrlpipe(kaweth->dev, 0),
312 KAWETH_COMMAND_GET_ETHERNET_DESC,
313 USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE,
314 0,
315 0,
316 (void *)&kaweth->configuration,
317 sizeof(kaweth->configuration),
318 KAWETH_CONTROL_TIMEOUT);
319
320 return retval;
321}
322
323/****************************************************************
324 * kaweth_set_urb_size
325 ****************************************************************/
326static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size)
327{
328 int retval;
329
330 dbg("Setting URB size to %d", (unsigned)urb_size);
331
332 retval = kaweth_control(kaweth,
333 usb_sndctrlpipe(kaweth->dev, 0),
334 KAWETH_COMMAND_SET_URB_SIZE,
335 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
336 urb_size,
337 0,
338 (void *)&kaweth->scratch,
339 0,
340 KAWETH_CONTROL_TIMEOUT);
341
342 return retval;
343}
344
345/****************************************************************
346 * kaweth_set_sofs_wait
347 ****************************************************************/
348static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait)
349{
350 int retval;
351
352 dbg("Set SOFS wait to %d", (unsigned)sofs_wait);
353
354 retval = kaweth_control(kaweth,
355 usb_sndctrlpipe(kaweth->dev, 0),
356 KAWETH_COMMAND_SET_SOFS_WAIT,
357 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
358 sofs_wait,
359 0,
360 (void *)&kaweth->scratch,
361 0,
362 KAWETH_CONTROL_TIMEOUT);
363
364 return retval;
365}
366
367/****************************************************************
368 * kaweth_set_receive_filter
369 ****************************************************************/
370static int kaweth_set_receive_filter(struct kaweth_device *kaweth,
371 __u16 receive_filter)
372{
373 int retval;
374
375 dbg("Set receive filter to %d", (unsigned)receive_filter);
376
377 retval = kaweth_control(kaweth,
378 usb_sndctrlpipe(kaweth->dev, 0),
379 KAWETH_COMMAND_SET_PACKET_FILTER,
380 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
381 receive_filter,
382 0,
383 (void *)&kaweth->scratch,
384 0,
385 KAWETH_CONTROL_TIMEOUT);
386
387 return retval;
388}
389
390/****************************************************************
391 * kaweth_download_firmware
392 ****************************************************************/
393static int kaweth_download_firmware(struct kaweth_device *kaweth,
394 const char *fwname,
395 __u8 interrupt,
396 __u8 type)
397{
398 const struct firmware *fw;
399 int data_len;
400 int ret;
401
402 ret = request_firmware(&fw, fwname, &kaweth->dev->dev);
403 if (ret) {
404 dev_err(&kaweth->intf->dev, "Firmware request failed\n");
405 return ret;
406 }
407
408 if (fw->size > KAWETH_FIRMWARE_BUF_SIZE) {
409 dev_err(&kaweth->intf->dev, "Firmware too big: %zu\n",
410 fw->size);
411 release_firmware(fw);
412 return -ENOSPC;
413 }
414 data_len = fw->size;
415 memcpy(kaweth->firmware_buf, fw->data, fw->size);
416
417 release_firmware(fw);
418
419 kaweth->firmware_buf[2] = (data_len & 0xFF) - 7;
420 kaweth->firmware_buf[3] = data_len >> 8;
421 kaweth->firmware_buf[4] = type;
422 kaweth->firmware_buf[5] = interrupt;
423
424 dbg("High: %i, Low:%i", kaweth->firmware_buf[3],
425 kaweth->firmware_buf[2]);
426
427 dbg("Downloading firmware at %p to kaweth device at %p",
428 fw->data, kaweth);
429 dbg("Firmware length: %d", data_len);
430
431 return kaweth_control(kaweth,
432 usb_sndctrlpipe(kaweth->dev, 0),
433 KAWETH_COMMAND_SCAN,
434 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
435 0,
436 0,
437 (void *)kaweth->firmware_buf,
438 data_len,
439 KAWETH_CONTROL_TIMEOUT);
440}
441
442/****************************************************************
443 * kaweth_trigger_firmware
444 ****************************************************************/
445static int kaweth_trigger_firmware(struct kaweth_device *kaweth,
446 __u8 interrupt)
447{
448 kaweth->firmware_buf[0] = 0xB6;
449 kaweth->firmware_buf[1] = 0xC3;
450 kaweth->firmware_buf[2] = 0x01;
451 kaweth->firmware_buf[3] = 0x00;
452 kaweth->firmware_buf[4] = 0x06;
453 kaweth->firmware_buf[5] = interrupt;
454 kaweth->firmware_buf[6] = 0x00;
455 kaweth->firmware_buf[7] = 0x00;
456
457 dbg("Triggering firmware");
458
459 return kaweth_control(kaweth,
460 usb_sndctrlpipe(kaweth->dev, 0),
461 KAWETH_COMMAND_SCAN,
462 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
463 0,
464 0,
465 (void *)kaweth->firmware_buf,
466 8,
467 KAWETH_CONTROL_TIMEOUT);
468}
469
470/****************************************************************
471 * kaweth_reset
472 ****************************************************************/
473static int kaweth_reset(struct kaweth_device *kaweth)
474{
475 int result;
476
477 dbg("kaweth_reset(%p)", kaweth);
478 result = usb_reset_configuration(kaweth->dev);
479 mdelay(10);
480
481 dbg("kaweth_reset() returns %d.",result);
482
483 return result;
484}
485
486static void kaweth_usb_receive(struct urb *);
487static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t);
488
489/****************************************************************
490 int_callback
491*****************************************************************/
492
493static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf)
494{
495 int status;
496
497 status = usb_submit_urb (kaweth->irq_urb, mf);
498 if (unlikely(status == -ENOMEM)) {
499 kaweth->suspend_lowmem_ctrl = 1;
500 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
501 } else {
502 kaweth->suspend_lowmem_ctrl = 0;
503 }
504
505 if (status)
506 dev_err(&kaweth->intf->dev,
507 "can't resubmit intr, %s-%s, status %d\n",
508 kaweth->dev->bus->bus_name,
509 kaweth->dev->devpath, status);
510}
511
512static void int_callback(struct urb *u)
513{
514 struct kaweth_device *kaweth = u->context;
515 int act_state;
516 int status = u->status;
517
518 switch (status) {
519 case 0: /* success */
520 break;
521 case -ECONNRESET: /* unlink */
522 case -ENOENT:
523 case -ESHUTDOWN:
524 return;
525 /* -EPIPE: should clear the halt */
526 default: /* error */
527 goto resubmit;
528 }
529
530 /* we check the link state to report changes */
531 if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) {
532 if (act_state)
533 netif_carrier_on(kaweth->net);
534 else
535 netif_carrier_off(kaweth->net);
536
537 kaweth->linkstate = act_state;
538 }
539resubmit:
540 kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC);
541}
542
543static void kaweth_resubmit_tl(struct work_struct *work)
544{
545 struct kaweth_device *kaweth =
546 container_of(work, struct kaweth_device, lowmem_work.work);
547
548 if (IS_BLOCKED(kaweth->status))
549 return;
550
551 if (kaweth->suspend_lowmem_rx)
552 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
553
554 if (kaweth->suspend_lowmem_ctrl)
555 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
556}
557
558
559/****************************************************************
560 * kaweth_resubmit_rx_urb
561 ****************************************************************/
562static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth,
563 gfp_t mem_flags)
564{
565 int result;
566
567 usb_fill_bulk_urb(kaweth->rx_urb,
568 kaweth->dev,
569 usb_rcvbulkpipe(kaweth->dev, 1),
570 kaweth->rx_buf,
571 KAWETH_BUF_SIZE,
572 kaweth_usb_receive,
573 kaweth);
574 kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
575 kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle;
576
577 if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) {
578 if (result == -ENOMEM) {
579 kaweth->suspend_lowmem_rx = 1;
580 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
581 }
582 dev_err(&kaweth->intf->dev, "resubmitting rx_urb %d failed\n",
583 result);
584 } else {
585 kaweth->suspend_lowmem_rx = 0;
586 }
587
588 return result;
589}
590
591static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth);
592
593/****************************************************************
594 * kaweth_usb_receive
595 ****************************************************************/
596static 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 == -EPIPE)) {
610 kaweth->stats.rx_errors++;
611 kaweth->end = 1;
612 wake_up(&kaweth->term_wait);
613 dbg("Status was -EPIPE.");
614 return;
615 }
616 if (unlikely(status == -ECONNRESET || status == -ESHUTDOWN)) {
617 /* we are killed - set a flag and wake the disconnect handler */
618 kaweth->end = 1;
619 wake_up(&kaweth->term_wait);
620 dbg("Status was -ECONNRESET or -ESHUTDOWN.");
621 return;
622 }
623 if (unlikely(status == -EPROTO || status == -ETIME ||
624 status == -EILSEQ)) {
625 kaweth->stats.rx_errors++;
626 dbg("Status was -EPROTO, -ETIME, or -EILSEQ.");
627 return;
628 }
629 if (unlikely(status == -EOVERFLOW)) {
630 kaweth->stats.rx_errors++;
631 dbg("Status was -EOVERFLOW.");
632 }
633 spin_lock(&kaweth->device_lock);
634 if (IS_BLOCKED(kaweth->status)) {
635 spin_unlock(&kaweth->device_lock);
636 return;
637 }
638 spin_unlock(&kaweth->device_lock);
639
640 if(status && status != -EREMOTEIO && count != 1) {
641 dev_err(&kaweth->intf->dev,
642 "%s RX status: %d count: %d packet_len: %d\n",
643 net->name, status, count, (int)pkt_len);
644 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
645 return;
646 }
647
648 if(kaweth->net && (count > 2)) {
649 if(pkt_len > (count - 2)) {
650 dev_err(&kaweth->intf->dev,
651 "Packet length too long for USB frame (pkt_len: %x, count: %x)\n",
652 pkt_len, count);
653 dev_err(&kaweth->intf->dev, "Packet len & 2047: %x\n",
654 pkt_len & 2047);
655 dev_err(&kaweth->intf->dev, "Count 2: %x\n", count2);
656 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
657 return;
658 }
659
660 if(!(skb = dev_alloc_skb(pkt_len+2))) {
661 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
662 return;
663 }
664
665 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
666
667 skb_copy_to_linear_data(skb, kaweth->rx_buf + 2, pkt_len);
668
669 skb_put(skb, pkt_len);
670
671 skb->protocol = eth_type_trans(skb, net);
672
673 netif_rx(skb);
674
675 kaweth->stats.rx_packets++;
676 kaweth->stats.rx_bytes += pkt_len;
677 }
678
679 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
680}
681
682/****************************************************************
683 * kaweth_open
684 ****************************************************************/
685static int kaweth_open(struct net_device *net)
686{
687 struct kaweth_device *kaweth = netdev_priv(net);
688 int res;
689
690 dbg("Opening network device.");
691
692 res = usb_autopm_get_interface(kaweth->intf);
693 if (res) {
694 dev_err(&kaweth->intf->dev, "Interface cannot be resumed.\n");
695 return -EIO;
696 }
697 res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL);
698 if (res)
699 goto err_out;
700
701 usb_fill_int_urb(
702 kaweth->irq_urb,
703 kaweth->dev,
704 usb_rcvintpipe(kaweth->dev, 3),
705 kaweth->intbuffer,
706 INTBUFFERSIZE,
707 int_callback,
708 kaweth,
709 250); /* overriding the descriptor */
710 kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle;
711 kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
712
713 res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL);
714 if (res) {
715 usb_kill_urb(kaweth->rx_urb);
716 goto err_out;
717 }
718 kaweth->opened = 1;
719
720 netif_start_queue(net);
721
722 kaweth_async_set_rx_mode(kaweth);
723 return 0;
724
725err_out:
726 usb_autopm_put_interface(kaweth->intf);
727 return -EIO;
728}
729
730/****************************************************************
731 * kaweth_kill_urbs
732 ****************************************************************/
733static void kaweth_kill_urbs(struct kaweth_device *kaweth)
734{
735 usb_kill_urb(kaweth->irq_urb);
736 usb_kill_urb(kaweth->rx_urb);
737 usb_kill_urb(kaweth->tx_urb);
738
739 cancel_delayed_work_sync(&kaweth->lowmem_work);
740
741 /* a scheduled work may have resubmitted,
742 we hit them again */
743 usb_kill_urb(kaweth->irq_urb);
744 usb_kill_urb(kaweth->rx_urb);
745}
746
747/****************************************************************
748 * kaweth_close
749 ****************************************************************/
750static int kaweth_close(struct net_device *net)
751{
752 struct kaweth_device *kaweth = netdev_priv(net);
753
754 netif_stop_queue(net);
755 kaweth->opened = 0;
756
757 kaweth->status |= KAWETH_STATUS_CLOSING;
758
759 kaweth_kill_urbs(kaweth);
760
761 kaweth->status &= ~KAWETH_STATUS_CLOSING;
762
763 usb_autopm_put_interface(kaweth->intf);
764
765 return 0;
766}
767
768static u32 kaweth_get_link(struct net_device *dev)
769{
770 struct kaweth_device *kaweth = netdev_priv(dev);
771
772 return kaweth->linkstate;
773}
774
775static const struct ethtool_ops ops = {
776 .get_link = kaweth_get_link
777};
778
779/****************************************************************
780 * kaweth_usb_transmit_complete
781 ****************************************************************/
782static void kaweth_usb_transmit_complete(struct urb *urb)
783{
784 struct kaweth_device *kaweth = urb->context;
785 struct sk_buff *skb = kaweth->tx_skb;
786 int status = urb->status;
787
788 if (unlikely(status != 0))
789 if (status != -ENOENT)
790 dbg("%s: TX status %d.", kaweth->net->name, status);
791
792 netif_wake_queue(kaweth->net);
793 dev_kfree_skb_irq(skb);
794}
795
796/****************************************************************
797 * kaweth_start_xmit
798 ****************************************************************/
799static netdev_tx_t kaweth_start_xmit(struct sk_buff *skb,
800 struct net_device *net)
801{
802 struct kaweth_device *kaweth = netdev_priv(net);
803 __le16 *private_header;
804
805 int res;
806
807 spin_lock_irq(&kaweth->device_lock);
808
809 kaweth_async_set_rx_mode(kaweth);
810 netif_stop_queue(net);
811 if (IS_BLOCKED(kaweth->status)) {
812 goto skip;
813 }
814
815 /* We now decide whether we can put our special header into the sk_buff */
816 if (skb_cloned(skb) || skb_headroom(skb) < 2) {
817 /* no such luck - we make our own */
818 struct sk_buff *copied_skb;
819 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC);
820 dev_kfree_skb_irq(skb);
821 skb = copied_skb;
822 if (!copied_skb) {
823 kaweth->stats.tx_errors++;
824 netif_start_queue(net);
825 spin_unlock_irq(&kaweth->device_lock);
826 return NETDEV_TX_OK;
827 }
828 }
829
830 private_header = (__le16 *)__skb_push(skb, 2);
831 *private_header = cpu_to_le16(skb->len-2);
832 kaweth->tx_skb = skb;
833
834 usb_fill_bulk_urb(kaweth->tx_urb,
835 kaweth->dev,
836 usb_sndbulkpipe(kaweth->dev, 2),
837 private_header,
838 skb->len,
839 kaweth_usb_transmit_complete,
840 kaweth);
841 kaweth->end = 0;
842
843 if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
844 {
845 dev_warn(&net->dev, "kaweth failed tx_urb %d\n", res);
846skip:
847 kaweth->stats.tx_errors++;
848
849 netif_start_queue(net);
850 dev_kfree_skb_irq(skb);
851 }
852 else
853 {
854 kaweth->stats.tx_packets++;
855 kaweth->stats.tx_bytes += skb->len;
856 }
857
858 spin_unlock_irq(&kaweth->device_lock);
859
860 return NETDEV_TX_OK;
861}
862
863/****************************************************************
864 * kaweth_set_rx_mode
865 ****************************************************************/
866static void kaweth_set_rx_mode(struct net_device *net)
867{
868 struct kaweth_device *kaweth = netdev_priv(net);
869
870 __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
871 KAWETH_PACKET_FILTER_BROADCAST |
872 KAWETH_PACKET_FILTER_MULTICAST;
873
874 dbg("Setting Rx mode to %d", packet_filter_bitmap);
875
876 netif_stop_queue(net);
877
878 if (net->flags & IFF_PROMISC) {
879 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
880 }
881 else if (!netdev_mc_empty(net) || (net->flags & IFF_ALLMULTI)) {
882 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
883 }
884
885 kaweth->packet_filter_bitmap = packet_filter_bitmap;
886 netif_wake_queue(net);
887}
888
889/****************************************************************
890 * kaweth_async_set_rx_mode
891 ****************************************************************/
892static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
893{
894 int result;
895 __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
896
897 kaweth->packet_filter_bitmap = 0;
898 if (packet_filter_bitmap == 0)
899 return;
900
901 if (in_interrupt())
902 return;
903
904 result = kaweth_control(kaweth,
905 usb_sndctrlpipe(kaweth->dev, 0),
906 KAWETH_COMMAND_SET_PACKET_FILTER,
907 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
908 packet_filter_bitmap,
909 0,
910 (void *)&kaweth->scratch,
911 0,
912 KAWETH_CONTROL_TIMEOUT);
913
914 if(result < 0) {
915 dev_err(&kaweth->intf->dev, "Failed to set Rx mode: %d\n",
916 result);
917 }
918 else {
919 dbg("Set Rx mode to %d", packet_filter_bitmap);
920 }
921}
922
923/****************************************************************
924 * kaweth_netdev_stats
925 ****************************************************************/
926static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev)
927{
928 struct kaweth_device *kaweth = netdev_priv(dev);
929 return &kaweth->stats;
930}
931
932/****************************************************************
933 * kaweth_tx_timeout
934 ****************************************************************/
935static void kaweth_tx_timeout(struct net_device *net)
936{
937 struct kaweth_device *kaweth = netdev_priv(net);
938
939 dev_warn(&net->dev, "%s: Tx timed out. Resetting.\n", net->name);
940 kaweth->stats.tx_errors++;
941 net->trans_start = jiffies;
942
943 usb_unlink_urb(kaweth->tx_urb);
944}
945
946/****************************************************************
947 * kaweth_suspend
948 ****************************************************************/
949static int kaweth_suspend(struct usb_interface *intf, pm_message_t message)
950{
951 struct kaweth_device *kaweth = usb_get_intfdata(intf);
952 unsigned long flags;
953
954 dbg("Suspending device");
955 spin_lock_irqsave(&kaweth->device_lock, flags);
956 kaweth->status |= KAWETH_STATUS_SUSPENDING;
957 spin_unlock_irqrestore(&kaweth->device_lock, flags);
958
959 kaweth_kill_urbs(kaweth);
960 return 0;
961}
962
963/****************************************************************
964 * kaweth_resume
965 ****************************************************************/
966static int kaweth_resume(struct usb_interface *intf)
967{
968 struct kaweth_device *kaweth = usb_get_intfdata(intf);
969 unsigned long flags;
970
971 dbg("Resuming device");
972 spin_lock_irqsave(&kaweth->device_lock, flags);
973 kaweth->status &= ~KAWETH_STATUS_SUSPENDING;
974 spin_unlock_irqrestore(&kaweth->device_lock, flags);
975
976 if (!kaweth->opened)
977 return 0;
978 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
979 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
980
981 return 0;
982}
983
984/****************************************************************
985 * kaweth_probe
986 ****************************************************************/
987
988
989static const struct net_device_ops kaweth_netdev_ops = {
990 .ndo_open = kaweth_open,
991 .ndo_stop = kaweth_close,
992 .ndo_start_xmit = kaweth_start_xmit,
993 .ndo_tx_timeout = kaweth_tx_timeout,
994 .ndo_set_rx_mode = kaweth_set_rx_mode,
995 .ndo_get_stats = kaweth_netdev_stats,
996 .ndo_change_mtu = eth_change_mtu,
997 .ndo_set_mac_address = eth_mac_addr,
998 .ndo_validate_addr = eth_validate_addr,
999};
1000
1001static int kaweth_probe(
1002 struct usb_interface *intf,
1003 const struct usb_device_id *id /* from id_table */
1004 )
1005{
1006 struct usb_device *dev = interface_to_usbdev(intf);
1007 struct kaweth_device *kaweth;
1008 struct net_device *netdev;
1009 const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
1010 int result = 0;
1011
1012 dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x",
1013 dev->devnum,
1014 le16_to_cpu(dev->descriptor.idVendor),
1015 le16_to_cpu(dev->descriptor.idProduct),
1016 le16_to_cpu(dev->descriptor.bcdDevice));
1017
1018 dbg("Device at %p", dev);
1019
1020 dbg("Descriptor length: %x type: %x",
1021 (int)dev->descriptor.bLength,
1022 (int)dev->descriptor.bDescriptorType);
1023
1024 netdev = alloc_etherdev(sizeof(*kaweth));
1025 if (!netdev)
1026 return -ENOMEM;
1027
1028 kaweth = netdev_priv(netdev);
1029 kaweth->dev = dev;
1030 kaweth->net = netdev;
1031
1032 spin_lock_init(&kaweth->device_lock);
1033 init_waitqueue_head(&kaweth->term_wait);
1034
1035 dbg("Resetting.");
1036
1037 kaweth_reset(kaweth);
1038
1039 /*
1040 * If high byte of bcdDevice is nonzero, firmware is already
1041 * downloaded. Don't try to do it again, or we'll hang the device.
1042 */
1043
1044 if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) {
1045 dev_info(&intf->dev, "Firmware present in device.\n");
1046 } else {
1047 /* Download the firmware */
1048 dev_info(&intf->dev, "Downloading firmware...\n");
1049 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
1050 if ((result = kaweth_download_firmware(kaweth,
1051 "kaweth/new_code.bin",
1052 100,
1053 2)) < 0) {
1054 dev_err(&intf->dev, "Error downloading firmware (%d)\n",
1055 result);
1056 goto err_fw;
1057 }
1058
1059 if ((result = kaweth_download_firmware(kaweth,
1060 "kaweth/new_code_fix.bin",
1061 100,
1062 3)) < 0) {
1063 dev_err(&intf->dev,
1064 "Error downloading firmware fix (%d)\n",
1065 result);
1066 goto err_fw;
1067 }
1068
1069 if ((result = kaweth_download_firmware(kaweth,
1070 "kaweth/trigger_code.bin",
1071 126,
1072 2)) < 0) {
1073 dev_err(&intf->dev,
1074 "Error downloading trigger code (%d)\n",
1075 result);
1076 goto err_fw;
1077
1078 }
1079
1080 if ((result = kaweth_download_firmware(kaweth,
1081 "kaweth/trigger_code_fix.bin",
1082 126,
1083 3)) < 0) {
1084 dev_err(&intf->dev, "Error downloading trigger code fix (%d)\n", result);
1085 goto err_fw;
1086 }
1087
1088
1089 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
1090 dev_err(&intf->dev, "Error triggering firmware (%d)\n",
1091 result);
1092 goto err_fw;
1093 }
1094
1095 /* Device will now disappear for a moment... */
1096 dev_info(&intf->dev, "Firmware loaded. I'll be back...\n");
1097err_fw:
1098 free_page((unsigned long)kaweth->firmware_buf);
1099 free_netdev(netdev);
1100 return -EIO;
1101 }
1102
1103 result = kaweth_read_configuration(kaweth);
1104
1105 if(result < 0) {
1106 dev_err(&intf->dev, "Error reading configuration (%d), no net device created\n", result);
1107 goto err_free_netdev;
1108 }
1109
1110 dev_info(&intf->dev, "Statistics collection: %x\n", kaweth->configuration.statistics_mask);
1111 dev_info(&intf->dev, "Multicast filter limit: %x\n", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
1112 dev_info(&intf->dev, "MTU: %d\n", le16_to_cpu(kaweth->configuration.segment_size));
1113 dev_info(&intf->dev, "Read MAC address %pM\n", kaweth->configuration.hw_addr);
1114
1115 if(!memcmp(&kaweth->configuration.hw_addr,
1116 &bcast_addr,
1117 sizeof(bcast_addr))) {
1118 dev_err(&intf->dev, "Firmware not functioning properly, no net device created\n");
1119 goto err_free_netdev;
1120 }
1121
1122 if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
1123 dbg("Error setting URB size");
1124 goto err_free_netdev;
1125 }
1126
1127 if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
1128 dev_err(&intf->dev, "Error setting SOFS wait\n");
1129 goto err_free_netdev;
1130 }
1131
1132 result = kaweth_set_receive_filter(kaweth,
1133 KAWETH_PACKET_FILTER_DIRECTED |
1134 KAWETH_PACKET_FILTER_BROADCAST |
1135 KAWETH_PACKET_FILTER_MULTICAST);
1136
1137 if(result < 0) {
1138 dev_err(&intf->dev, "Error setting receive filter\n");
1139 goto err_free_netdev;
1140 }
1141
1142 dbg("Initializing net device.");
1143
1144 kaweth->intf = intf;
1145
1146 kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1147 if (!kaweth->tx_urb)
1148 goto err_free_netdev;
1149 kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1150 if (!kaweth->rx_urb)
1151 goto err_only_tx;
1152 kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1153 if (!kaweth->irq_urb)
1154 goto err_tx_and_rx;
1155
1156 kaweth->intbuffer = usb_alloc_coherent( kaweth->dev,
1157 INTBUFFERSIZE,
1158 GFP_KERNEL,
1159 &kaweth->intbufferhandle);
1160 if (!kaweth->intbuffer)
1161 goto err_tx_and_rx_and_irq;
1162 kaweth->rx_buf = usb_alloc_coherent( kaweth->dev,
1163 KAWETH_BUF_SIZE,
1164 GFP_KERNEL,
1165 &kaweth->rxbufferhandle);
1166 if (!kaweth->rx_buf)
1167 goto err_all_but_rxbuf;
1168
1169 memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr));
1170 memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr,
1171 sizeof(kaweth->configuration.hw_addr));
1172
1173 netdev->netdev_ops = &kaweth_netdev_ops;
1174 netdev->watchdog_timeo = KAWETH_TX_TIMEOUT;
1175 netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size);
1176 SET_ETHTOOL_OPS(netdev, &ops);
1177
1178 /* kaweth is zeroed as part of alloc_netdev */
1179 INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl);
1180 usb_set_intfdata(intf, kaweth);
1181
1182#if 0
1183// dma_supported() is deeply broken on almost all architectures
1184 if (dma_supported (&intf->dev, 0xffffffffffffffffULL))
1185 kaweth->net->features |= NETIF_F_HIGHDMA;
1186#endif
1187
1188 SET_NETDEV_DEV(netdev, &intf->dev);
1189 if (register_netdev(netdev) != 0) {
1190 dev_err(&intf->dev, "Error registering netdev.\n");
1191 goto err_intfdata;
1192 }
1193
1194 dev_info(&intf->dev, "kaweth interface created at %s\n",
1195 kaweth->net->name);
1196
1197 dbg("Kaweth probe returning.");
1198
1199 return 0;
1200
1201err_intfdata:
1202 usb_set_intfdata(intf, NULL);
1203 usb_free_coherent(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1204err_all_but_rxbuf:
1205 usb_free_coherent(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1206err_tx_and_rx_and_irq:
1207 usb_free_urb(kaweth->irq_urb);
1208err_tx_and_rx:
1209 usb_free_urb(kaweth->rx_urb);
1210err_only_tx:
1211 usb_free_urb(kaweth->tx_urb);
1212err_free_netdev:
1213 free_netdev(netdev);
1214
1215 return -EIO;
1216}
1217
1218/****************************************************************
1219 * kaweth_disconnect
1220 ****************************************************************/
1221static void kaweth_disconnect(struct usb_interface *intf)
1222{
1223 struct kaweth_device *kaweth = usb_get_intfdata(intf);
1224 struct net_device *netdev;
1225
1226 dev_info(&intf->dev, "Unregistering\n");
1227
1228 usb_set_intfdata(intf, NULL);
1229 if (!kaweth) {
1230 dev_warn(&intf->dev, "unregistering non-existent device\n");
1231 return;
1232 }
1233 netdev = kaweth->net;
1234
1235 dbg("Unregistering net device");
1236 unregister_netdev(netdev);
1237
1238 usb_free_urb(kaweth->rx_urb);
1239 usb_free_urb(kaweth->tx_urb);
1240 usb_free_urb(kaweth->irq_urb);
1241
1242 usb_free_coherent(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1243 usb_free_coherent(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1244
1245 free_netdev(netdev);
1246}
1247
1248
1249// FIXME this completion stuff is a modified clone of
1250// an OLD version of some stuff in usb.c ...
1251struct usb_api_data {
1252 wait_queue_head_t wqh;
1253 int done;
1254};
1255
1256/*-------------------------------------------------------------------*
1257 * completion handler for compatibility wrappers (sync control/bulk) *
1258 *-------------------------------------------------------------------*/
1259static void usb_api_blocking_completion(struct urb *urb)
1260{
1261 struct usb_api_data *awd = (struct usb_api_data *)urb->context;
1262
1263 awd->done=1;
1264 wake_up(&awd->wqh);
1265}
1266
1267/*-------------------------------------------------------------------*
1268 * COMPATIBILITY STUFF *
1269 *-------------------------------------------------------------------*/
1270
1271// Starts urb and waits for completion or timeout
1272static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
1273{
1274 struct usb_api_data awd;
1275 int status;
1276
1277 init_waitqueue_head(&awd.wqh);
1278 awd.done = 0;
1279
1280 urb->context = &awd;
1281 status = usb_submit_urb(urb, GFP_NOIO);
1282 if (status) {
1283 // something went wrong
1284 usb_free_urb(urb);
1285 return status;
1286 }
1287
1288 if (!wait_event_timeout(awd.wqh, awd.done, timeout)) {
1289 // timeout
1290 dev_warn(&urb->dev->dev, "usb_control/bulk_msg: timeout\n");
1291 usb_kill_urb(urb); // remove urb safely
1292 status = -ETIMEDOUT;
1293 }
1294 else {
1295 status = urb->status;
1296 }
1297
1298 if (actual_length) {
1299 *actual_length = urb->actual_length;
1300 }
1301
1302 usb_free_urb(urb);
1303 return status;
1304}
1305
1306/*-------------------------------------------------------------------*/
1307// returns status (negative) or length (positive)
1308static int kaweth_internal_control_msg(struct usb_device *usb_dev,
1309 unsigned int pipe,
1310 struct usb_ctrlrequest *cmd, void *data,
1311 int len, int timeout)
1312{
1313 struct urb *urb;
1314 int retv;
1315 int length = 0; /* shut up GCC */
1316
1317 urb = usb_alloc_urb(0, GFP_ATOMIC);
1318 if (!urb)
1319 return -ENOMEM;
1320
1321 usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data,
1322 len, usb_api_blocking_completion, NULL);
1323
1324 retv = usb_start_wait_urb(urb, timeout, &length);
1325 if (retv < 0) {
1326 return retv;
1327 }
1328 else {
1329 return length;
1330 }
1331}
1332
1333module_usb_driver(kaweth_driver);