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net: cdc_ncm: cleanup a type issue in cdc_ncm_setup()
[deliverable/linux.git] / drivers / net / usb / kaweth.c
1 /****************************************************************
2 *
3 * kaweth.c - driver for KL5KUSB101 based USB->Ethernet
4 *
5 * (c) 2000 Interlan Communications
6 * (c) 2000 Stephane Alnet
7 * (C) 2001 Brad Hards
8 * (C) 2002 Oliver Neukum
9 *
10 * Original author: The Zapman <zapman@interlan.net>
11 * Inspired by, and much credit goes to Michael Rothwell
12 * <rothwell@interlan.net> for the test equipment, help, and patience
13 * Based off of (and with thanks to) Petko Manolov's pegaus.c driver.
14 * Also many thanks to Joel Silverman and Ed Surprenant at Kawasaki
15 * for providing the firmware and driver resources.
16 *
17 * This program is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU General Public License as
19 * published by the Free Software Foundation; either version 2, or
20 * (at your option) any later version.
21 *
22 * This program is distributed in the hope that it will be useful,
23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 * GNU General Public License for more details.
26 *
27 * You should have received a copy of the GNU General Public License
28 * along with this program; if not, write to the Free Software Foundation,
29 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
30 *
31 ****************************************************************/
32
33 /* TODO:
34 * Develop test procedures for USB net interfaces
35 * Run test procedures
36 * Fix bugs from previous two steps
37 * Snoop other OSs for any tricks we're not doing
38 * Reduce arbitrary timeouts
39 * Smart multicast support
40 * Temporary MAC change support
41 * Tunable SOFs parameter - ioctl()?
42 * Ethernet stats collection
43 * Code formatting improvements
44 */
45
46 #include <linux/module.h>
47 #include <linux/slab.h>
48 #include <linux/string.h>
49 #include <linux/init.h>
50 #include <linux/delay.h>
51 #include <linux/netdevice.h>
52 #include <linux/etherdevice.h>
53 #include <linux/usb.h>
54 #include <linux/types.h>
55 #include <linux/ethtool.h>
56 #include <linux/dma-mapping.h>
57 #include <linux/wait.h>
58 #include <linux/firmware.h>
59 #include <asm/uaccess.h>
60 #include <asm/byteorder.h>
61
62 #undef DEBUG
63
64 #define KAWETH_MTU 1514
65 #define KAWETH_BUF_SIZE 1664
66 #define KAWETH_TX_TIMEOUT (5 * HZ)
67 #define KAWETH_SCRATCH_SIZE 32
68 #define KAWETH_FIRMWARE_BUF_SIZE 4096
69 #define KAWETH_CONTROL_TIMEOUT (30000)
70
71 #define KAWETH_STATUS_BROKEN 0x0000001
72 #define KAWETH_STATUS_CLOSING 0x0000002
73 #define KAWETH_STATUS_SUSPENDING 0x0000004
74
75 #define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING)
76
77 #define KAWETH_PACKET_FILTER_PROMISCUOUS 0x01
78 #define KAWETH_PACKET_FILTER_ALL_MULTICAST 0x02
79 #define KAWETH_PACKET_FILTER_DIRECTED 0x04
80 #define KAWETH_PACKET_FILTER_BROADCAST 0x08
81 #define KAWETH_PACKET_FILTER_MULTICAST 0x10
82
83 /* Table 7 */
84 #define KAWETH_COMMAND_GET_ETHERNET_DESC 0x00
85 #define KAWETH_COMMAND_MULTICAST_FILTERS 0x01
86 #define KAWETH_COMMAND_SET_PACKET_FILTER 0x02
87 #define KAWETH_COMMAND_STATISTICS 0x03
88 #define KAWETH_COMMAND_SET_TEMP_MAC 0x06
89 #define KAWETH_COMMAND_GET_TEMP_MAC 0x07
90 #define KAWETH_COMMAND_SET_URB_SIZE 0x08
91 #define KAWETH_COMMAND_SET_SOFS_WAIT 0x09
92 #define KAWETH_COMMAND_SCAN 0xFF
93
94 #define KAWETH_SOFS_TO_WAIT 0x05
95
96 #define INTBUFFERSIZE 4
97
98 #define STATE_OFFSET 0
99 #define STATE_MASK 0x40
100 #define STATE_SHIFT 5
101
102 #define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED)
103
104
105 MODULE_AUTHOR("Michael Zappe <zapman@interlan.net>, Stephane Alnet <stephane@u-picardie.fr>, Brad Hards <bhards@bigpond.net.au> and Oliver Neukum <oliver@neukum.org>");
106 MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver");
107 MODULE_LICENSE("GPL");
108 MODULE_FIRMWARE("kaweth/new_code.bin");
109 MODULE_FIRMWARE("kaweth/new_code_fix.bin");
110 MODULE_FIRMWARE("kaweth/trigger_code.bin");
111 MODULE_FIRMWARE("kaweth/trigger_code_fix.bin");
112
113 static const char driver_name[] = "kaweth";
114
115 static int kaweth_probe(
116 struct usb_interface *intf,
117 const struct usb_device_id *id /* from id_table */
118 );
119 static void kaweth_disconnect(struct usb_interface *intf);
120 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
121 unsigned int pipe,
122 struct usb_ctrlrequest *cmd, void *data,
123 int len, int timeout);
124 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message);
125 static int kaweth_resume(struct usb_interface *intf);
126
127 /****************************************************************
128 * usb_device_id
129 ****************************************************************/
130 static struct usb_device_id usb_klsi_table[] = {
131 { USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */
132 { USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */
133 { USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */
134 { USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */
135 { USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */
136 { USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */
137 { USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */
138 { USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */
139 { USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */
140 { USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */
141 { USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */
142 { USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */
143 { USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */
144 { USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */
145 { USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */
146 { USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */
147 { USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */
148 { USB_DEVICE(0x07c9, 0xb010) }, /* Allied Telesyn AT-USB10 USB Ethernet Adapter */
149 { USB_DEVICE(0x0846, 0x1001) }, /* NetGear EA-101 */
150 { USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */
151 { USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */
152 { USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */
153 { USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */
154 { USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */
155 { USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */
156 { USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */
157 { USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */
158 { USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */
159 { USB_DEVICE(0x1485, 0x0001) }, /* Silicom U2E */
160 { USB_DEVICE(0x1485, 0x0002) }, /* Psion Dacom Gold Port Ethernet */
161 { USB_DEVICE(0x1645, 0x0005) }, /* Entrega E45 */
162 { USB_DEVICE(0x1645, 0x0008) }, /* Entrega USB Ethernet Adapter */
163 { USB_DEVICE(0x1645, 0x8005) }, /* PortGear Ethernet Adapter */
164 { USB_DEVICE(0x1668, 0x0323) }, /* Actiontec USB Ethernet */
165 { USB_DEVICE(0x2001, 0x4000) }, /* D-link DSB-650C */
166 {} /* Null terminator */
167 };
168
169 MODULE_DEVICE_TABLE (usb, usb_klsi_table);
170
171 /****************************************************************
172 * kaweth_driver
173 ****************************************************************/
174 static struct usb_driver kaweth_driver = {
175 .name = driver_name,
176 .probe = kaweth_probe,
177 .disconnect = kaweth_disconnect,
178 .suspend = kaweth_suspend,
179 .resume = kaweth_resume,
180 .id_table = usb_klsi_table,
181 .supports_autosuspend = 1,
182 .disable_hub_initiated_lpm = 1,
183 };
184
185 typedef __u8 eth_addr_t[6];
186
187 /****************************************************************
188 * usb_eth_dev
189 ****************************************************************/
190 struct 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 ****************************************************************/
201 struct 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 ****************************************************************/
216 struct 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 ****************************************************************/
257 static 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 netdev_dbg(kaweth->net, "kaweth_control()\n");
271
272 if(in_interrupt()) {
273 netdev_dbg(kaweth->net, "in_interrupt()\n");
274 return -EBUSY;
275 }
276
277 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
278 if (!dr)
279 return -ENOMEM;
280
281 dr->bRequestType = requesttype;
282 dr->bRequest = request;
283 dr->wValue = cpu_to_le16(value);
284 dr->wIndex = cpu_to_le16(index);
285 dr->wLength = cpu_to_le16(size);
286
287 retval = kaweth_internal_control_msg(kaweth->dev,
288 pipe,
289 dr,
290 data,
291 size,
292 timeout);
293
294 kfree(dr);
295 return retval;
296 }
297
298 /****************************************************************
299 * kaweth_read_configuration
300 ****************************************************************/
301 static int kaweth_read_configuration(struct kaweth_device *kaweth)
302 {
303 int retval;
304
305 netdev_dbg(kaweth->net, "Reading kaweth configuration\n");
306
307 retval = kaweth_control(kaweth,
308 usb_rcvctrlpipe(kaweth->dev, 0),
309 KAWETH_COMMAND_GET_ETHERNET_DESC,
310 USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE,
311 0,
312 0,
313 (void *)&kaweth->configuration,
314 sizeof(kaweth->configuration),
315 KAWETH_CONTROL_TIMEOUT);
316
317 return retval;
318 }
319
320 /****************************************************************
321 * kaweth_set_urb_size
322 ****************************************************************/
323 static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size)
324 {
325 int retval;
326
327 netdev_dbg(kaweth->net, "Setting URB size to %d\n", (unsigned)urb_size);
328
329 retval = kaweth_control(kaweth,
330 usb_sndctrlpipe(kaweth->dev, 0),
331 KAWETH_COMMAND_SET_URB_SIZE,
332 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
333 urb_size,
334 0,
335 (void *)&kaweth->scratch,
336 0,
337 KAWETH_CONTROL_TIMEOUT);
338
339 return retval;
340 }
341
342 /****************************************************************
343 * kaweth_set_sofs_wait
344 ****************************************************************/
345 static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait)
346 {
347 int retval;
348
349 netdev_dbg(kaweth->net, "Set SOFS wait to %d\n", (unsigned)sofs_wait);
350
351 retval = kaweth_control(kaweth,
352 usb_sndctrlpipe(kaweth->dev, 0),
353 KAWETH_COMMAND_SET_SOFS_WAIT,
354 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
355 sofs_wait,
356 0,
357 (void *)&kaweth->scratch,
358 0,
359 KAWETH_CONTROL_TIMEOUT);
360
361 return retval;
362 }
363
364 /****************************************************************
365 * kaweth_set_receive_filter
366 ****************************************************************/
367 static int kaweth_set_receive_filter(struct kaweth_device *kaweth,
368 __u16 receive_filter)
369 {
370 int retval;
371
372 netdev_dbg(kaweth->net, "Set receive filter to %d\n",
373 (unsigned)receive_filter);
374
375 retval = kaweth_control(kaweth,
376 usb_sndctrlpipe(kaweth->dev, 0),
377 KAWETH_COMMAND_SET_PACKET_FILTER,
378 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
379 receive_filter,
380 0,
381 (void *)&kaweth->scratch,
382 0,
383 KAWETH_CONTROL_TIMEOUT);
384
385 return retval;
386 }
387
388 /****************************************************************
389 * kaweth_download_firmware
390 ****************************************************************/
391 static int kaweth_download_firmware(struct kaweth_device *kaweth,
392 const char *fwname,
393 __u8 interrupt,
394 __u8 type)
395 {
396 const struct firmware *fw;
397 int data_len;
398 int ret;
399
400 ret = request_firmware(&fw, fwname, &kaweth->dev->dev);
401 if (ret) {
402 dev_err(&kaweth->intf->dev, "Firmware request failed\n");
403 return ret;
404 }
405
406 if (fw->size > KAWETH_FIRMWARE_BUF_SIZE) {
407 dev_err(&kaweth->intf->dev, "Firmware too big: %zu\n",
408 fw->size);
409 release_firmware(fw);
410 return -ENOSPC;
411 }
412 data_len = fw->size;
413 memcpy(kaweth->firmware_buf, fw->data, fw->size);
414
415 release_firmware(fw);
416
417 kaweth->firmware_buf[2] = (data_len & 0xFF) - 7;
418 kaweth->firmware_buf[3] = data_len >> 8;
419 kaweth->firmware_buf[4] = type;
420 kaweth->firmware_buf[5] = interrupt;
421
422 netdev_dbg(kaweth->net, "High: %i, Low:%i\n", kaweth->firmware_buf[3],
423 kaweth->firmware_buf[2]);
424
425 netdev_dbg(kaweth->net,
426 "Downloading firmware at %p to kaweth device at %p\n",
427 kaweth->firmware_buf, kaweth);
428 netdev_dbg(kaweth->net, "Firmware length: %d\n", data_len);
429
430 return kaweth_control(kaweth,
431 usb_sndctrlpipe(kaweth->dev, 0),
432 KAWETH_COMMAND_SCAN,
433 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
434 0,
435 0,
436 (void *)kaweth->firmware_buf,
437 data_len,
438 KAWETH_CONTROL_TIMEOUT);
439 }
440
441 /****************************************************************
442 * kaweth_trigger_firmware
443 ****************************************************************/
444 static int kaweth_trigger_firmware(struct kaweth_device *kaweth,
445 __u8 interrupt)
446 {
447 kaweth->firmware_buf[0] = 0xB6;
448 kaweth->firmware_buf[1] = 0xC3;
449 kaweth->firmware_buf[2] = 0x01;
450 kaweth->firmware_buf[3] = 0x00;
451 kaweth->firmware_buf[4] = 0x06;
452 kaweth->firmware_buf[5] = interrupt;
453 kaweth->firmware_buf[6] = 0x00;
454 kaweth->firmware_buf[7] = 0x00;
455
456 netdev_dbg(kaweth->net, "Triggering firmware\n");
457
458 return kaweth_control(kaweth,
459 usb_sndctrlpipe(kaweth->dev, 0),
460 KAWETH_COMMAND_SCAN,
461 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
462 0,
463 0,
464 (void *)kaweth->firmware_buf,
465 8,
466 KAWETH_CONTROL_TIMEOUT);
467 }
468
469 /****************************************************************
470 * kaweth_reset
471 ****************************************************************/
472 static int kaweth_reset(struct kaweth_device *kaweth)
473 {
474 int result;
475
476 netdev_dbg(kaweth->net, "kaweth_reset(%p)\n", kaweth);
477 result = usb_reset_configuration(kaweth->dev);
478 mdelay(10);
479
480 netdev_dbg(kaweth->net, "kaweth_reset() returns %d.\n", result);
481
482 return result;
483 }
484
485 static void kaweth_usb_receive(struct urb *);
486 static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t);
487
488 /****************************************************************
489 int_callback
490 *****************************************************************/
491
492 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf)
493 {
494 int status;
495
496 status = usb_submit_urb (kaweth->irq_urb, mf);
497 if (unlikely(status == -ENOMEM)) {
498 kaweth->suspend_lowmem_ctrl = 1;
499 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
500 } else {
501 kaweth->suspend_lowmem_ctrl = 0;
502 }
503
504 if (status)
505 dev_err(&kaweth->intf->dev,
506 "can't resubmit intr, %s-%s, status %d\n",
507 kaweth->dev->bus->bus_name,
508 kaweth->dev->devpath, status);
509 }
510
511 static void int_callback(struct urb *u)
512 {
513 struct kaweth_device *kaweth = u->context;
514 int act_state;
515 int status = u->status;
516
517 switch (status) {
518 case 0: /* success */
519 break;
520 case -ECONNRESET: /* unlink */
521 case -ENOENT:
522 case -ESHUTDOWN:
523 return;
524 /* -EPIPE: should clear the halt */
525 default: /* error */
526 goto resubmit;
527 }
528
529 /* we check the link state to report changes */
530 if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) {
531 if (act_state)
532 netif_carrier_on(kaweth->net);
533 else
534 netif_carrier_off(kaweth->net);
535
536 kaweth->linkstate = act_state;
537 }
538 resubmit:
539 kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC);
540 }
541
542 static void kaweth_resubmit_tl(struct work_struct *work)
543 {
544 struct kaweth_device *kaweth =
545 container_of(work, struct kaweth_device, lowmem_work.work);
546
547 if (IS_BLOCKED(kaweth->status))
548 return;
549
550 if (kaweth->suspend_lowmem_rx)
551 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
552
553 if (kaweth->suspend_lowmem_ctrl)
554 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
555 }
556
557
558 /****************************************************************
559 * kaweth_resubmit_rx_urb
560 ****************************************************************/
561 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth,
562 gfp_t mem_flags)
563 {
564 int result;
565
566 usb_fill_bulk_urb(kaweth->rx_urb,
567 kaweth->dev,
568 usb_rcvbulkpipe(kaweth->dev, 1),
569 kaweth->rx_buf,
570 KAWETH_BUF_SIZE,
571 kaweth_usb_receive,
572 kaweth);
573 kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
574 kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle;
575
576 if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) {
577 if (result == -ENOMEM) {
578 kaweth->suspend_lowmem_rx = 1;
579 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
580 }
581 dev_err(&kaweth->intf->dev, "resubmitting rx_urb %d failed\n",
582 result);
583 } else {
584 kaweth->suspend_lowmem_rx = 0;
585 }
586
587 return result;
588 }
589
590 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth);
591
592 /****************************************************************
593 * kaweth_usb_receive
594 ****************************************************************/
595 static void kaweth_usb_receive(struct urb *urb)
596 {
597 struct device *dev = &urb->dev->dev;
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 dev_dbg(dev, "Status was -EPIPE.\n");
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 dev_dbg(dev, "Status was -ECONNRESET or -ESHUTDOWN.\n");
621 return;
622 }
623 if (unlikely(status == -EPROTO || status == -ETIME ||
624 status == -EILSEQ)) {
625 kaweth->stats.rx_errors++;
626 dev_dbg(dev, "Status was -EPROTO, -ETIME, or -EILSEQ.\n");
627 return;
628 }
629 if (unlikely(status == -EOVERFLOW)) {
630 kaweth->stats.rx_errors++;
631 dev_dbg(dev, "Status was -EOVERFLOW.\n");
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 ****************************************************************/
685 static int kaweth_open(struct net_device *net)
686 {
687 struct kaweth_device *kaweth = netdev_priv(net);
688 int res;
689
690 netdev_dbg(kaweth->net, "Opening network device.\n");
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
725 err_out:
726 usb_autopm_put_interface(kaweth->intf);
727 return -EIO;
728 }
729
730 /****************************************************************
731 * kaweth_kill_urbs
732 ****************************************************************/
733 static 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 ****************************************************************/
750 static 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
768 static u32 kaweth_get_link(struct net_device *dev)
769 {
770 struct kaweth_device *kaweth = netdev_priv(dev);
771
772 return kaweth->linkstate;
773 }
774
775 static const struct ethtool_ops ops = {
776 .get_link = kaweth_get_link
777 };
778
779 /****************************************************************
780 * kaweth_usb_transmit_complete
781 ****************************************************************/
782 static 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 dev_dbg(&urb->dev->dev, "%s: TX status %d.\n",
791 kaweth->net->name, status);
792
793 netif_wake_queue(kaweth->net);
794 dev_kfree_skb_irq(skb);
795 }
796
797 /****************************************************************
798 * kaweth_start_xmit
799 ****************************************************************/
800 static netdev_tx_t kaweth_start_xmit(struct sk_buff *skb,
801 struct net_device *net)
802 {
803 struct kaweth_device *kaweth = netdev_priv(net);
804 __le16 *private_header;
805
806 int res;
807
808 spin_lock_irq(&kaweth->device_lock);
809
810 kaweth_async_set_rx_mode(kaweth);
811 netif_stop_queue(net);
812 if (IS_BLOCKED(kaweth->status)) {
813 goto skip;
814 }
815
816 /* We now decide whether we can put our special header into the sk_buff */
817 if (skb_cloned(skb) || skb_headroom(skb) < 2) {
818 /* no such luck - we make our own */
819 struct sk_buff *copied_skb;
820 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC);
821 dev_kfree_skb_irq(skb);
822 skb = copied_skb;
823 if (!copied_skb) {
824 kaweth->stats.tx_errors++;
825 netif_start_queue(net);
826 spin_unlock_irq(&kaweth->device_lock);
827 return NETDEV_TX_OK;
828 }
829 }
830
831 private_header = (__le16 *)__skb_push(skb, 2);
832 *private_header = cpu_to_le16(skb->len-2);
833 kaweth->tx_skb = skb;
834
835 usb_fill_bulk_urb(kaweth->tx_urb,
836 kaweth->dev,
837 usb_sndbulkpipe(kaweth->dev, 2),
838 private_header,
839 skb->len,
840 kaweth_usb_transmit_complete,
841 kaweth);
842 kaweth->end = 0;
843
844 if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
845 {
846 dev_warn(&net->dev, "kaweth failed tx_urb %d\n", res);
847 skip:
848 kaweth->stats.tx_errors++;
849
850 netif_start_queue(net);
851 dev_kfree_skb_irq(skb);
852 }
853 else
854 {
855 kaweth->stats.tx_packets++;
856 kaweth->stats.tx_bytes += skb->len;
857 }
858
859 spin_unlock_irq(&kaweth->device_lock);
860
861 return NETDEV_TX_OK;
862 }
863
864 /****************************************************************
865 * kaweth_set_rx_mode
866 ****************************************************************/
867 static void kaweth_set_rx_mode(struct net_device *net)
868 {
869 struct kaweth_device *kaweth = netdev_priv(net);
870
871 __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
872 KAWETH_PACKET_FILTER_BROADCAST |
873 KAWETH_PACKET_FILTER_MULTICAST;
874
875 netdev_dbg(net, "Setting Rx mode to %d\n", packet_filter_bitmap);
876
877 netif_stop_queue(net);
878
879 if (net->flags & IFF_PROMISC) {
880 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
881 }
882 else if (!netdev_mc_empty(net) || (net->flags & IFF_ALLMULTI)) {
883 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
884 }
885
886 kaweth->packet_filter_bitmap = packet_filter_bitmap;
887 netif_wake_queue(net);
888 }
889
890 /****************************************************************
891 * kaweth_async_set_rx_mode
892 ****************************************************************/
893 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
894 {
895 int result;
896 __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
897
898 kaweth->packet_filter_bitmap = 0;
899 if (packet_filter_bitmap == 0)
900 return;
901
902 if (in_interrupt())
903 return;
904
905 result = kaweth_control(kaweth,
906 usb_sndctrlpipe(kaweth->dev, 0),
907 KAWETH_COMMAND_SET_PACKET_FILTER,
908 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
909 packet_filter_bitmap,
910 0,
911 (void *)&kaweth->scratch,
912 0,
913 KAWETH_CONTROL_TIMEOUT);
914
915 if(result < 0) {
916 dev_err(&kaweth->intf->dev, "Failed to set Rx mode: %d\n",
917 result);
918 }
919 else {
920 netdev_dbg(kaweth->net, "Set Rx mode to %d\n",
921 packet_filter_bitmap);
922 }
923 }
924
925 /****************************************************************
926 * kaweth_netdev_stats
927 ****************************************************************/
928 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev)
929 {
930 struct kaweth_device *kaweth = netdev_priv(dev);
931 return &kaweth->stats;
932 }
933
934 /****************************************************************
935 * kaweth_tx_timeout
936 ****************************************************************/
937 static void kaweth_tx_timeout(struct net_device *net)
938 {
939 struct kaweth_device *kaweth = netdev_priv(net);
940
941 dev_warn(&net->dev, "%s: Tx timed out. Resetting.\n", net->name);
942 kaweth->stats.tx_errors++;
943 net->trans_start = jiffies;
944
945 usb_unlink_urb(kaweth->tx_urb);
946 }
947
948 /****************************************************************
949 * kaweth_suspend
950 ****************************************************************/
951 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message)
952 {
953 struct kaweth_device *kaweth = usb_get_intfdata(intf);
954 unsigned long flags;
955
956 dev_dbg(&intf->dev, "Suspending device\n");
957 spin_lock_irqsave(&kaweth->device_lock, flags);
958 kaweth->status |= KAWETH_STATUS_SUSPENDING;
959 spin_unlock_irqrestore(&kaweth->device_lock, flags);
960
961 kaweth_kill_urbs(kaweth);
962 return 0;
963 }
964
965 /****************************************************************
966 * kaweth_resume
967 ****************************************************************/
968 static int kaweth_resume(struct usb_interface *intf)
969 {
970 struct kaweth_device *kaweth = usb_get_intfdata(intf);
971 unsigned long flags;
972
973 dev_dbg(&intf->dev, "Resuming device\n");
974 spin_lock_irqsave(&kaweth->device_lock, flags);
975 kaweth->status &= ~KAWETH_STATUS_SUSPENDING;
976 spin_unlock_irqrestore(&kaweth->device_lock, flags);
977
978 if (!kaweth->opened)
979 return 0;
980 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
981 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
982
983 return 0;
984 }
985
986 /****************************************************************
987 * kaweth_probe
988 ****************************************************************/
989
990
991 static const struct net_device_ops kaweth_netdev_ops = {
992 .ndo_open = kaweth_open,
993 .ndo_stop = kaweth_close,
994 .ndo_start_xmit = kaweth_start_xmit,
995 .ndo_tx_timeout = kaweth_tx_timeout,
996 .ndo_set_rx_mode = kaweth_set_rx_mode,
997 .ndo_get_stats = kaweth_netdev_stats,
998 .ndo_change_mtu = eth_change_mtu,
999 .ndo_set_mac_address = eth_mac_addr,
1000 .ndo_validate_addr = eth_validate_addr,
1001 };
1002
1003 static int kaweth_probe(
1004 struct usb_interface *intf,
1005 const struct usb_device_id *id /* from id_table */
1006 )
1007 {
1008 struct device *dev = &intf->dev;
1009 struct usb_device *udev = interface_to_usbdev(intf);
1010 struct kaweth_device *kaweth;
1011 struct net_device *netdev;
1012 const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
1013 int result = 0;
1014
1015 dev_dbg(dev,
1016 "Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x\n",
1017 udev->devnum, le16_to_cpu(udev->descriptor.idVendor),
1018 le16_to_cpu(udev->descriptor.idProduct),
1019 le16_to_cpu(udev->descriptor.bcdDevice));
1020
1021 dev_dbg(dev, "Device at %p\n", udev);
1022
1023 dev_dbg(dev, "Descriptor length: %x type: %x\n",
1024 (int)udev->descriptor.bLength,
1025 (int)udev->descriptor.bDescriptorType);
1026
1027 netdev = alloc_etherdev(sizeof(*kaweth));
1028 if (!netdev)
1029 return -ENOMEM;
1030
1031 kaweth = netdev_priv(netdev);
1032 kaweth->dev = udev;
1033 kaweth->net = netdev;
1034
1035 spin_lock_init(&kaweth->device_lock);
1036 init_waitqueue_head(&kaweth->term_wait);
1037
1038 dev_dbg(dev, "Resetting.\n");
1039
1040 kaweth_reset(kaweth);
1041
1042 /*
1043 * If high byte of bcdDevice is nonzero, firmware is already
1044 * downloaded. Don't try to do it again, or we'll hang the device.
1045 */
1046
1047 if (le16_to_cpu(udev->descriptor.bcdDevice) >> 8) {
1048 dev_info(dev, "Firmware present in device.\n");
1049 } else {
1050 /* Download the firmware */
1051 dev_info(dev, "Downloading firmware...\n");
1052 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
1053 if ((result = kaweth_download_firmware(kaweth,
1054 "kaweth/new_code.bin",
1055 100,
1056 2)) < 0) {
1057 dev_err(dev, "Error downloading firmware (%d)\n",
1058 result);
1059 goto err_fw;
1060 }
1061
1062 if ((result = kaweth_download_firmware(kaweth,
1063 "kaweth/new_code_fix.bin",
1064 100,
1065 3)) < 0) {
1066 dev_err(dev, "Error downloading firmware fix (%d)\n",
1067 result);
1068 goto err_fw;
1069 }
1070
1071 if ((result = kaweth_download_firmware(kaweth,
1072 "kaweth/trigger_code.bin",
1073 126,
1074 2)) < 0) {
1075 dev_err(dev, "Error downloading trigger code (%d)\n",
1076 result);
1077 goto err_fw;
1078
1079 }
1080
1081 if ((result = kaweth_download_firmware(kaweth,
1082 "kaweth/trigger_code_fix.bin",
1083 126,
1084 3)) < 0) {
1085 dev_err(dev, "Error downloading trigger code fix (%d)\n", result);
1086 goto err_fw;
1087 }
1088
1089
1090 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
1091 dev_err(dev, "Error triggering firmware (%d)\n", result);
1092 goto err_fw;
1093 }
1094
1095 /* Device will now disappear for a moment... */
1096 dev_info(dev, "Firmware loaded. I'll be back...\n");
1097 err_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(dev, "Error reading configuration (%d), no net device created\n", result);
1107 goto err_free_netdev;
1108 }
1109
1110 dev_info(dev, "Statistics collection: %x\n", kaweth->configuration.statistics_mask);
1111 dev_info(dev, "Multicast filter limit: %x\n", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
1112 dev_info(dev, "MTU: %d\n", le16_to_cpu(kaweth->configuration.segment_size));
1113 dev_info(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(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 dev_dbg(dev, "Error setting URB size\n");
1124 goto err_free_netdev;
1125 }
1126
1127 if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
1128 dev_err(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(dev, "Error setting receive filter\n");
1139 goto err_free_netdev;
1140 }
1141
1142 dev_dbg(dev, "Initializing net device.\n");
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 (dev, 0xffffffffffffffffULL))
1185 kaweth->net->features |= NETIF_F_HIGHDMA;
1186 #endif
1187
1188 SET_NETDEV_DEV(netdev, dev);
1189 if (register_netdev(netdev) != 0) {
1190 dev_err(dev, "Error registering netdev.\n");
1191 goto err_intfdata;
1192 }
1193
1194 dev_info(dev, "kaweth interface created at %s\n",
1195 kaweth->net->name);
1196
1197 dev_dbg(dev, "Kaweth probe returning.\n");
1198
1199 return 0;
1200
1201 err_intfdata:
1202 usb_set_intfdata(intf, NULL);
1203 usb_free_coherent(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1204 err_all_but_rxbuf:
1205 usb_free_coherent(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1206 err_tx_and_rx_and_irq:
1207 usb_free_urb(kaweth->irq_urb);
1208 err_tx_and_rx:
1209 usb_free_urb(kaweth->rx_urb);
1210 err_only_tx:
1211 usb_free_urb(kaweth->tx_urb);
1212 err_free_netdev:
1213 free_netdev(netdev);
1214
1215 return -EIO;
1216 }
1217
1218 /****************************************************************
1219 * kaweth_disconnect
1220 ****************************************************************/
1221 static 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 netdev_dbg(kaweth->net, "Unregistering net device\n");
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 ...
1251 struct 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 *-------------------------------------------------------------------*/
1259 static 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
1272 static 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)
1308 static 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
1333 module_usb_driver(kaweth_driver);
Linux kernel - Deliverables
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