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usb: gadgetfs remove delayed init mode
[linux-2.6-block.git] / drivers / usb / net / kaweth.c
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1da177e4
LT		 1/****************************************************************
2 *
3 * kaweth.c - driver for KL5KUSB101 based USB->Ethernet
4 *
5 * (c) 2000 Interlan Communications
6 * (c) 2000 Stephane Alnet
7 * (C) 2001 Brad Hards
8 * (C) 2002 Oliver Neukum
9 *
10 * Original author: The Zapman <zapman@interlan.net>
11 * Inspired by, and much credit goes to Michael Rothwell
12 * <rothwell@interlan.net> for the test equipment, help, and patience
13 * Based off of (and with thanks to) Petko Manolov's pegaus.c driver.
14 * Also many thanks to Joel Silverman and Ed Surprenant at Kawasaki
15 * for providing the firmware and driver resources.
16 *
17 * This program is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU General Public License as
19 * published by the Free Software Foundation; either version 2, or
20 * (at your option) any later version.
21 *
22 * This program is distributed in the hope that it will be useful,
23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 * GNU General Public License for more details.
26 *
27 * You should have received a copy of the GNU General Public License
28 * along with this program; if not, write to the Free Software Foundation,
29 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
30 *
31 ****************************************************************/
32
33/* TODO:
34 * Fix in_interrupt() problem
35 * Develop test procedures for USB net interfaces
36 * Run test procedures
37 * Fix bugs from previous two steps
38 * Snoop other OSs for any tricks we're not doing
39 * SMP locking
40 * Reduce arbitrary timeouts
41 * Smart multicast support
42 * Temporary MAC change support
43 * Tunable SOFs parameter - ioctl()?
44 * Ethernet stats collection
45 * Code formatting improvements
46 */
47
48#include <linux/module.h>
49#include <linux/sched.h>
50#include <linux/slab.h>
51#include <linux/string.h>
52#include <linux/init.h>
53#include <linux/delay.h>
54#include <linux/netdevice.h>
55#include <linux/etherdevice.h>
56#include <linux/usb.h>
57#include <linux/types.h>
58#include <linux/ethtool.h>
59#include <linux/pci.h>
60#include <linux/dma-mapping.h>
61#include <linux/wait.h>
62#include <asm/uaccess.h>
63#include <asm/semaphore.h>
64#include <asm/byteorder.h>
65
66#undef DEBUG
67
1da177e4
LT		 68#include "kawethfw.h"
69
70#define KAWETH_MTU 1514
71#define KAWETH_BUF_SIZE 1664
72#define KAWETH_TX_TIMEOUT (5 * HZ)
73#define KAWETH_SCRATCH_SIZE 32
74#define KAWETH_FIRMWARE_BUF_SIZE 4096
75#define KAWETH_CONTROL_TIMEOUT (30 * HZ)
76
77#define KAWETH_STATUS_BROKEN 0x0000001
78#define KAWETH_STATUS_CLOSING 0x0000002
1a2ea1df
ON		 79#define KAWETH_STATUS_SUSPENDING 0x0000004
80
81#define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING)
1da177e4
LT		 82
83#define KAWETH_PACKET_FILTER_PROMISCUOUS 0x01
84#define KAWETH_PACKET_FILTER_ALL_MULTICAST 0x02
85#define KAWETH_PACKET_FILTER_DIRECTED 0x04
86#define KAWETH_PACKET_FILTER_BROADCAST 0x08
87#define KAWETH_PACKET_FILTER_MULTICAST 0x10
88
89/* Table 7 */
90#define KAWETH_COMMAND_GET_ETHERNET_DESC 0x00
91#define KAWETH_COMMAND_MULTICAST_FILTERS 0x01
92#define KAWETH_COMMAND_SET_PACKET_FILTER 0x02
93#define KAWETH_COMMAND_STATISTICS 0x03
94#define KAWETH_COMMAND_SET_TEMP_MAC 0x06
95#define KAWETH_COMMAND_GET_TEMP_MAC 0x07
96#define KAWETH_COMMAND_SET_URB_SIZE 0x08
97#define KAWETH_COMMAND_SET_SOFS_WAIT 0x09
98#define KAWETH_COMMAND_SCAN 0xFF
99
100#define KAWETH_SOFS_TO_WAIT 0x05
101
102#define INTBUFFERSIZE 4
103
104#define STATE_OFFSET 0
105#define STATE_MASK 0x40
106#define STATE_SHIFT 5
107
1a2ea1df
ON		 108#define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED)
109
1da177e4
LT		 110
111MODULE_AUTHOR("Michael Zappe <zapman@interlan.net>, Stephane Alnet <stephane@u-picardie.fr>, Brad Hards <bhards@bigpond.net.au> and Oliver Neukum <oliver@neukum.org>");
112MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver");
113MODULE_LICENSE("GPL");
114
115static const char driver_name[] = "kaweth";
116
117static int kaweth_probe(
118 struct usb_interface *intf,
119 const struct usb_device_id *id /* from id_table */
120 );
121static void kaweth_disconnect(struct usb_interface *intf);
122static int kaweth_internal_control_msg(struct usb_device *usb_dev,
123 unsigned int pipe,
124 struct usb_ctrlrequest *cmd, void *data,
125 int len, int timeout);
1a2ea1df
ON		 126static int kaweth_suspend(struct usb_interface *intf, pm_message_t message);
127static int kaweth_resume(struct usb_interface *intf);
1da177e4
LT		 128
129/****************************************************************
130 * usb_device_id
131 ****************************************************************/
132static struct usb_device_id usb_klsi_table[] = {
133 { USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */
134 { USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */
135 { USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */
136 { USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */
137 { USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */
138 { USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */
139 { USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */
140 { USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */
141 { USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */
142 { USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */
143 { USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */
144 { USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */
145 { USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */
146 { USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */
147 { USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */
148 { USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */
149 { USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */
150 { USB_DEVICE(0x0846, 0x1001) }, /* NetGear EA-101 */
151 { USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */
152 { USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */
153 { USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */
154 { USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */
155 { USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */
156 { USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */
157 { USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */
158 { USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */
159 { USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */
160 { USB_DEVICE(0x1485, 0x0001) }, /* Silicom U2E */
161 { USB_DEVICE(0x1485, 0x0002) }, /* Psion Dacom Gold Port Ethernet */
162 { USB_DEVICE(0x1645, 0x0005) }, /* Entrega E45 */
163 { USB_DEVICE(0x1645, 0x0008) }, /* Entrega USB Ethernet Adapter */
164 { USB_DEVICE(0x1645, 0x8005) }, /* PortGear Ethernet Adapter */
486ba2a9 165 { USB_DEVICE(0x1668, 0x0323) }, /* Actiontec USB Ethernet */
1da177e4
LT		 166 { USB_DEVICE(0x2001, 0x4000) }, /* D-link DSB-650C */
167 {} /* Null terminator */
168};
169
170MODULE_DEVICE_TABLE (usb, usb_klsi_table);
171
172/****************************************************************
173 * kaweth_driver
174 ****************************************************************/
175static struct usb_driver kaweth_driver = {
1da177e4
LT		 176 .name = driver_name,
177 .probe = kaweth_probe,
178 .disconnect = kaweth_disconnect,
1a2ea1df
ON		 179 .suspend = kaweth_suspend,
180 .resume = kaweth_resume,
1da177e4
LT		 181 .id_table = usb_klsi_table,
182};
183
184typedef __u8 eth_addr_t[6];
185
186/****************************************************************
187 * usb_eth_dev
188 ****************************************************************/
189struct usb_eth_dev {
190 char *name;
191 __u16 vendor;
192 __u16 device;
193 void *pdata;
194};
195
196/****************************************************************
197 * kaweth_ethernet_configuration
198 * Refer Table 8
199 ****************************************************************/
200struct kaweth_ethernet_configuration
201{
202 __u8 size;
203 __u8 reserved1;
204 __u8 reserved2;
205 eth_addr_t hw_addr;
206 __u32 statistics_mask;
207 __le16 segment_size;
208 __u16 max_multicast_filters;
209 __u8 reserved3;
210} __attribute__ ((packed));
211
212/****************************************************************
213 * kaweth_device
214 ****************************************************************/
215struct kaweth_device
216{
217 spinlock_t device_lock;
218
219 __u32 status;
220 int end;
1da177e4
LT		 221 int suspend_lowmem_rx;
222 int suspend_lowmem_ctrl;
223 int linkstate;
1a2ea1df 224 int opened;
c4028958 225 struct delayed_work lowmem_work;
1da177e4
LT		 226
227 struct usb_device *dev;
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/****************************************************************
254 * kaweth_control
255 ****************************************************************/
256static int kaweth_control(struct kaweth_device *kaweth,
257 unsigned int pipe,
258 __u8 request,
259 __u8 requesttype,
260 __u16 value,
261 __u16 index,
262 void *data,
263 __u16 size,
264 int timeout)
265{
266 struct usb_ctrlrequest *dr;
267
fbe2bafc 268 dbg("kaweth_control()");
1da177e4
LT		 269
270 if(in_interrupt()) {
fbe2bafc 271 dbg("in_interrupt()");
1da177e4
LT		 272 return -EBUSY;
273 }
274
275 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
276
277 if (!dr) {
fbe2bafc 278 dbg("kmalloc() failed");
1da177e4
LT		 279 return -ENOMEM;
280 }
281
282 dr->bRequestType= requesttype;
283 dr->bRequest = request;
284 dr->wValue = cpu_to_le16p(&value);
285 dr->wIndex = cpu_to_le16p(&index);
286 dr->wLength = cpu_to_le16p(&size);
287
288 return kaweth_internal_control_msg(kaweth->dev,
289 pipe,
290 dr,
291 data,
292 size,
293 timeout);
294}
295
296/****************************************************************
297 * kaweth_read_configuration
298 ****************************************************************/
299static int kaweth_read_configuration(struct kaweth_device *kaweth)
300{
301 int retval;
302
fbe2bafc 303 dbg("Reading kaweth configuration");
1da177e4
LT		 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
fbe2bafc 325 dbg("Setting URB size to %d", (unsigned)urb_size);
1da177e4
LT		 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
fbe2bafc 347 dbg("Set SOFS wait to %d", (unsigned)sofs_wait);
1da177e4
LT		 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
fbe2bafc 370 dbg("Set receive filter to %d", (unsigned)receive_filter);
1da177e4
LT		 371
372 retval = kaweth_control(kaweth,
373 usb_sndctrlpipe(kaweth->dev, 0),
374 KAWETH_COMMAND_SET_PACKET_FILTER,
375 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
376 receive_filter,
377 0,
378 (void *)&kaweth->scratch,
379 0,
380 KAWETH_CONTROL_TIMEOUT);
381
382 return retval;
383}
384
385/****************************************************************
386 * kaweth_download_firmware
387 ****************************************************************/
388static int kaweth_download_firmware(struct kaweth_device *kaweth,
389 __u8 *data,
390 __u16 data_len,
391 __u8 interrupt,
392 __u8 type)
393{
394 if(data_len > KAWETH_FIRMWARE_BUF_SIZE) {
fbe2bafc 395 err("Firmware too big: %d", data_len);
1da177e4
LT		 396 return -ENOSPC;
397 }
398
399 memcpy(kaweth->firmware_buf, data, data_len);
400
401 kaweth->firmware_buf[2] = (data_len & 0xFF) - 7;
402 kaweth->firmware_buf[3] = data_len >> 8;
403 kaweth->firmware_buf[4] = type;
404 kaweth->firmware_buf[5] = interrupt;
405
fbe2bafc 406 dbg("High: %i, Low:%i", kaweth->firmware_buf[3],
1da177e4
LT		 407 kaweth->firmware_buf[2]);
408
fbe2bafc 409 dbg("Downloading firmware at %p to kaweth device at %p",
1da177e4
LT		 410 data,
411 kaweth);
fbe2bafc 412 dbg("Firmware length: %d", data_len);
1da177e4
LT		 413
414 return kaweth_control(kaweth,
415 usb_sndctrlpipe(kaweth->dev, 0),
416 KAWETH_COMMAND_SCAN,
417 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
418 0,
419 0,
420 (void *)kaweth->firmware_buf,
421 data_len,
422 KAWETH_CONTROL_TIMEOUT);
423}
424
425/****************************************************************
426 * kaweth_trigger_firmware
427 ****************************************************************/
428static int kaweth_trigger_firmware(struct kaweth_device *kaweth,
429 __u8 interrupt)
430{
431 kaweth->firmware_buf[0] = 0xB6;
432 kaweth->firmware_buf[1] = 0xC3;
433 kaweth->firmware_buf[2] = 0x01;
434 kaweth->firmware_buf[3] = 0x00;
435 kaweth->firmware_buf[4] = 0x06;
436 kaweth->firmware_buf[5] = interrupt;
437 kaweth->firmware_buf[6] = 0x00;
438 kaweth->firmware_buf[7] = 0x00;
439
fbe2bafc 440 dbg("Triggering firmware");
1da177e4
LT		 441
442 return kaweth_control(kaweth,
443 usb_sndctrlpipe(kaweth->dev, 0),
444 KAWETH_COMMAND_SCAN,
445 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
446 0,
447 0,
448 (void *)kaweth->firmware_buf,
449 8,
450 KAWETH_CONTROL_TIMEOUT);
451}
452
453/****************************************************************
454 * kaweth_reset
455 ****************************************************************/
456static int kaweth_reset(struct kaweth_device *kaweth)
457{
458 int result;
459
fbe2bafc 460 dbg("kaweth_reset(%p)", kaweth);
1da177e4
LT		 461 result = kaweth_control(kaweth,
462 usb_sndctrlpipe(kaweth->dev, 0),
463 USB_REQ_SET_CONFIGURATION,
464 0,
465 kaweth->dev->config[0].desc.bConfigurationValue,
466 0,
467 NULL,
468 0,
469 KAWETH_CONTROL_TIMEOUT);
470
f2d45cd9 471 mdelay(10);
1da177e4 472
fbe2bafc 473 dbg("kaweth_reset() returns %d.",result);
1da177e4
LT		 474
475 return result;
476}
477
7d12e780 478static void kaweth_usb_receive(struct urb *);
55016f10 479static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t);
1da177e4
LT		 480
481/****************************************************************
482 int_callback
483*****************************************************************/
484
55016f10 485static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf)
1da177e4
LT		 486{
487 int status;
488
489 status = usb_submit_urb (kaweth->irq_urb, mf);
490 if (unlikely(status == -ENOMEM)) {
491 kaweth->suspend_lowmem_ctrl = 1;
492 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
493 } else {
494 kaweth->suspend_lowmem_ctrl = 0;
495 }
496
497 if (status)
498 err ("can't resubmit intr, %s-%s, status %d",
499 kaweth->dev->bus->bus_name,
500 kaweth->dev->devpath, status);
501}
502
7d12e780 503static void int_callback(struct urb *u)
1da177e4
LT		 504{
505 struct kaweth_device *kaweth = u->context;
506 int act_state;
507
508 switch (u->status) {
509 case 0: /* success */
510 break;
511 case -ECONNRESET: /* unlink */
512 case -ENOENT:
513 case -ESHUTDOWN:
514 return;
515 /* -EPIPE: should clear the halt */
516 default: /* error */
517 goto resubmit;
518 }
519
520 /* we check the link state to report changes */
521 if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) {
58125f95 522 if (act_state)
1da177e4
LT		 523 netif_carrier_on(kaweth->net);
524 else
525 netif_carrier_off(kaweth->net);
526
527 kaweth->linkstate = act_state;
528 }
529resubmit:
530 kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC);
531}
532
c4028958 533static void kaweth_resubmit_tl(struct work_struct *work)
1da177e4 534{
c4028958
DH		 535 struct kaweth_device *kaweth =
536 container_of(work, struct kaweth_device, lowmem_work.work);
1da177e4 537
1a2ea1df 538 if (IS_BLOCKED(kaweth->status))
1da177e4
LT		 539 return;
540
541 if (kaweth->suspend_lowmem_rx)
542 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
543
544 if (kaweth->suspend_lowmem_ctrl)
545 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
546}
547
548
549/****************************************************************
550 * kaweth_resubmit_rx_urb
551 ****************************************************************/
552static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth,
55016f10 553 gfp_t mem_flags)
1da177e4
LT		 554{
555 int result;
556
557 usb_fill_bulk_urb(kaweth->rx_urb,
558 kaweth->dev,
559 usb_rcvbulkpipe(kaweth->dev, 1),
560 kaweth->rx_buf,
561 KAWETH_BUF_SIZE,
562 kaweth_usb_receive,
563 kaweth);
564 kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
565 kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle;
566
567 if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) {
568 if (result == -ENOMEM) {
569 kaweth->suspend_lowmem_rx = 1;
570 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
571 }
fbe2bafc 572 err("resubmitting rx_urb %d failed", result);
1da177e4
LT		 573 } else {
574 kaweth->suspend_lowmem_rx = 0;
575 }
576
577 return result;
578}
579
580static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth);
581
582/****************************************************************
583 * kaweth_usb_receive
584 ****************************************************************/
7d12e780 585static void kaweth_usb_receive(struct urb *urb)
1da177e4
LT		 586{
587 struct kaweth_device *kaweth = urb->context;
588 struct net_device *net = kaweth->net;
589
590 int count = urb->actual_length;
591 int count2 = urb->transfer_buffer_length;
592
593 __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf);
594
595 struct sk_buff *skb;
596
597 if(unlikely(urb->status == -ECONNRESET || urb->status == -ESHUTDOWN))
598 /* we are killed - set a flag and wake the disconnect handler */
599 {
600 kaweth->end = 1;
601 wake_up(&kaweth->term_wait);
602 return;
603 }
604
1a2ea1df
ON		 605 spin_lock(&kaweth->device_lock);
606 if (IS_BLOCKED(kaweth->status)) {
607 spin_unlock(&kaweth->device_lock);
1da177e4 608 return;
1a2ea1df
ON		 609 }
610 spin_unlock(&kaweth->device_lock);
1da177e4
LT		 611
612 if(urb->status && urb->status != -EREMOTEIO && count != 1) {
fbe2bafc 613 err("%s RX status: %d count: %d packet_len: %d",
1da177e4
LT		 614 net->name,
615 urb->status,
616 count,
617 (int)pkt_len);
618 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
619 return;
620 }
621
622 if(kaweth->net && (count > 2)) {
623 if(pkt_len > (count - 2)) {
fbe2bafc
ON		 624 err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count);
625 err("Packet len & 2047: %x", pkt_len & 2047);
626 err("Count 2: %x", count2);
1da177e4
LT		 627 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
628 return;
629 }
630
631 if(!(skb = dev_alloc_skb(pkt_len+2))) {
632 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
633 return;
634 }
635
636 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
637
638 skb->dev = net;
639
640 eth_copy_and_sum(skb, kaweth->rx_buf + 2, pkt_len, 0);
641
642 skb_put(skb, pkt_len);
643
644 skb->protocol = eth_type_trans(skb, net);
645
646 netif_rx(skb);
647
648 kaweth->stats.rx_packets++;
649 kaweth->stats.rx_bytes += pkt_len;
650 }
651
652 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
653}
654
655/****************************************************************
656 * kaweth_open
657 ****************************************************************/
658static int kaweth_open(struct net_device *net)
659{
660 struct kaweth_device *kaweth = netdev_priv(net);
661 int res;
662
fbe2bafc 663 dbg("Opening network device.");
1da177e4
LT		 664
665 res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL);
666 if (res)
667 return -EIO;
668
669 usb_fill_int_urb(
670 kaweth->irq_urb,
671 kaweth->dev,
672 usb_rcvintpipe(kaweth->dev, 3),
673 kaweth->intbuffer,
674 INTBUFFERSIZE,
675 int_callback,
676 kaweth,
677 250); /* overriding the descriptor */
678 kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle;
679 kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
680
681 res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL);
682 if (res) {
683 usb_kill_urb(kaweth->rx_urb);
684 return -EIO;
685 }
1a2ea1df 686 kaweth->opened = 1;
1da177e4
LT		 687
688 netif_start_queue(net);
689
690 kaweth_async_set_rx_mode(kaweth);
691 return 0;
692}
693
694/****************************************************************
695 * kaweth_close
696 ****************************************************************/
1a2ea1df 697static void kaweth_kill_urbs(struct kaweth_device *kaweth)
1da177e4 698{
1da177e4
LT		 699 usb_kill_urb(kaweth->irq_urb);
700 usb_kill_urb(kaweth->rx_urb);
d23b536b 701 usb_kill_urb(kaweth->tx_urb);
1da177e4
LT		 702
703 flush_scheduled_work();
704
705 /* a scheduled work may have resubmitted,
706 we hit them again */
707 usb_kill_urb(kaweth->irq_urb);
708 usb_kill_urb(kaweth->rx_urb);
1a2ea1df
ON		 709}
710
711/****************************************************************
712 * kaweth_close
713 ****************************************************************/
714static int kaweth_close(struct net_device *net)
715{
716 struct kaweth_device *kaweth = netdev_priv(net);
717
718 netif_stop_queue(net);
719 kaweth->opened = 0;
720
721 kaweth->status |= KAWETH_STATUS_CLOSING;
722
723 kaweth_kill_urbs(kaweth);
1da177e4
LT		 724
725 kaweth->status &= ~KAWETH_STATUS_CLOSING;
726
727 return 0;
728}
729
730static void kaweth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
731{
732
733 strlcpy(info->driver, driver_name, sizeof(info->driver));
734}
735
736static struct ethtool_ops ops = {
737 .get_drvinfo = kaweth_get_drvinfo
738};
739
740/****************************************************************
741 * kaweth_usb_transmit_complete
742 ****************************************************************/
7d12e780 743static void kaweth_usb_transmit_complete(struct urb *urb)
1da177e4
LT		 744{
745 struct kaweth_device *kaweth = urb->context;
746 struct sk_buff *skb = kaweth->tx_skb;
747
748 if (unlikely(urb->status != 0))
749 if (urb->status != -ENOENT)
fbe2bafc 750 dbg("%s: TX status %d.", kaweth->net->name, urb->status);
1da177e4
LT		 751
752 netif_wake_queue(kaweth->net);
753 dev_kfree_skb_irq(skb);
754}
755
756/****************************************************************
757 * kaweth_start_xmit
758 ****************************************************************/
759static int kaweth_start_xmit(struct sk_buff *skb, struct net_device *net)
760{
761 struct kaweth_device *kaweth = netdev_priv(net);
762 __le16 *private_header;
763
764 int res;
765
766 spin_lock(&kaweth->device_lock);
767
1da177e4
LT		 768 kaweth_async_set_rx_mode(kaweth);
769 netif_stop_queue(net);
1a2ea1df
ON		 770 if (IS_BLOCKED(kaweth->status)) {
771 goto skip;
772 }
1da177e4
LT		 773
774 /* We now decide whether we can put our special header into the sk_buff */
775 if (skb_cloned(skb) || skb_headroom(skb) < 2) {
776 /* no such luck - we make our own */
777 struct sk_buff *copied_skb;
778 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC);
779 dev_kfree_skb_irq(skb);
780 skb = copied_skb;
781 if (!copied_skb) {
782 kaweth->stats.tx_errors++;
783 netif_start_queue(net);
784 spin_unlock(&kaweth->device_lock);
785 return 0;
786 }
787 }
788
789 private_header = (__le16 *)__skb_push(skb, 2);
790 *private_header = cpu_to_le16(skb->len-2);
791 kaweth->tx_skb = skb;
792
793 usb_fill_bulk_urb(kaweth->tx_urb,
794 kaweth->dev,
795 usb_sndbulkpipe(kaweth->dev, 2),
796 private_header,
797 skb->len,
798 kaweth_usb_transmit_complete,
799 kaweth);
800 kaweth->end = 0;
1da177e4
LT		 801
802 if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
803 {
fbe2bafc 804 warn("kaweth failed tx_urb %d", res);
1a2ea1df 805skip:
1da177e4
LT		 806 kaweth->stats.tx_errors++;
807
808 netif_start_queue(net);
809 dev_kfree_skb_irq(skb);
810 }
811 else
812 {
813 kaweth->stats.tx_packets++;
814 kaweth->stats.tx_bytes += skb->len;
815 net->trans_start = jiffies;
816 }
817
818 spin_unlock(&kaweth->device_lock);
819
820 return 0;
821}
822
823/****************************************************************
824 * kaweth_set_rx_mode
825 ****************************************************************/
826static void kaweth_set_rx_mode(struct net_device *net)
827{
828 struct kaweth_device *kaweth = netdev_priv(net);
829
830 __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
831 KAWETH_PACKET_FILTER_BROADCAST |
832 KAWETH_PACKET_FILTER_MULTICAST;
833
fbe2bafc 834 dbg("Setting Rx mode to %d", packet_filter_bitmap);
1da177e4
LT		 835
836 netif_stop_queue(net);
837
838 if (net->flags & IFF_PROMISC) {
839 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
840 }
841 else if ((net->mc_count) || (net->flags & IFF_ALLMULTI)) {
842 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
843 }
844
845 kaweth->packet_filter_bitmap = packet_filter_bitmap;
846 netif_wake_queue(net);
847}
848
849/****************************************************************
850 * kaweth_async_set_rx_mode
851 ****************************************************************/
852static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
853{
854 __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
855 kaweth->packet_filter_bitmap = 0;
856 if (packet_filter_bitmap == 0)
857 return;
858
859 {
860 int result;
861 result = kaweth_control(kaweth,
862 usb_sndctrlpipe(kaweth->dev, 0),
863 KAWETH_COMMAND_SET_PACKET_FILTER,
864 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
865 packet_filter_bitmap,
866 0,
867 (void *)&kaweth->scratch,
868 0,
869 KAWETH_CONTROL_TIMEOUT);
870
871 if(result < 0) {
fbe2bafc 872 err("Failed to set Rx mode: %d", result);
1da177e4
LT		 873 }
874 else {
fbe2bafc 875 dbg("Set Rx mode to %d", packet_filter_bitmap);
1da177e4
LT		 876 }
877 }
878}
879
880/****************************************************************
881 * kaweth_netdev_stats
882 ****************************************************************/
883static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev)
884{
885 struct kaweth_device *kaweth = netdev_priv(dev);
886 return &kaweth->stats;
887}
888
889/****************************************************************
890 * kaweth_tx_timeout
891 ****************************************************************/
892static void kaweth_tx_timeout(struct net_device *net)
893{
894 struct kaweth_device *kaweth = netdev_priv(net);
895
fbe2bafc 896 warn("%s: Tx timed out. Resetting.", net->name);
1da177e4
LT		 897 kaweth->stats.tx_errors++;
898 net->trans_start = jiffies;
899
900 usb_unlink_urb(kaweth->tx_urb);
901}
902
1a2ea1df
ON		 903/****************************************************************
904 * kaweth_suspend
905 ****************************************************************/
906static int kaweth_suspend(struct usb_interface *intf, pm_message_t message)
907{
908 struct kaweth_device *kaweth = usb_get_intfdata(intf);
909 unsigned long flags;
910
911 spin_lock_irqsave(&kaweth->device_lock, flags);
912 kaweth->status |= KAWETH_STATUS_SUSPENDING;
913 spin_unlock_irqrestore(&kaweth->device_lock, flags);
914
915 kaweth_kill_urbs(kaweth);
916 return 0;
917}
918
919/****************************************************************
920 * kaweth_resume
921 ****************************************************************/
922static int kaweth_resume(struct usb_interface *intf)
923{
924 struct kaweth_device *kaweth = usb_get_intfdata(intf);
925 unsigned long flags;
926
927 spin_lock_irqsave(&kaweth->device_lock, flags);
928 kaweth->status &= ~KAWETH_STATUS_SUSPENDING;
929 spin_unlock_irqrestore(&kaweth->device_lock, flags);
930
931 if (!kaweth->opened)
932 return 0;
933 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
934 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
935
936 return 0;
937}
938
1da177e4
LT		 939/****************************************************************
940 * kaweth_probe
941 ****************************************************************/
942static int kaweth_probe(
943 struct usb_interface *intf,
944 const struct usb_device_id *id /* from id_table */
945 )
946{
947 struct usb_device *dev = interface_to_usbdev(intf);
948 struct kaweth_device *kaweth;
949 struct net_device *netdev;
950 const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
951 int result = 0;
952
fbe2bafc 953 dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x",
1da177e4
LT		 954 dev->devnum,
955 le16_to_cpu(dev->descriptor.idVendor),
956 le16_to_cpu(dev->descriptor.idProduct),
957 le16_to_cpu(dev->descriptor.bcdDevice));
958
fbe2bafc 959 dbg("Device at %p", dev);
1da177e4 960
fbe2bafc 961 dbg("Descriptor length: %x type: %x",
1da177e4
LT		 962 (int)dev->descriptor.bLength,
963 (int)dev->descriptor.bDescriptorType);
964
965 netdev = alloc_etherdev(sizeof(*kaweth));
966 if (!netdev)
967 return -ENOMEM;
968
969 kaweth = netdev_priv(netdev);
970 kaweth->dev = dev;
971 kaweth->net = netdev;
972
973 spin_lock_init(&kaweth->device_lock);
974 init_waitqueue_head(&kaweth->term_wait);
975
fbe2bafc 976 dbg("Resetting.");
1da177e4
LT		 977
978 kaweth_reset(kaweth);
979
980 /*
981 * If high byte of bcdDevice is nonzero, firmware is already
982 * downloaded. Don't try to do it again, or we'll hang the device.
983 */
984
985 if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) {
fbe2bafc 986 info("Firmware present in device.");
1da177e4
LT		 987 } else {
988 /* Download the firmware */
fbe2bafc 989 info("Downloading firmware...");
1da177e4
LT		 990 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
991 if ((result = kaweth_download_firmware(kaweth,
992 kaweth_new_code,
993 len_kaweth_new_code,
994 100,
995 2)) < 0) {
fbe2bafc 996 err("Error downloading firmware (%d)", result);
1da177e4
LT		 997 goto err_fw;
998 }
999
1000 if ((result = kaweth_download_firmware(kaweth,
1001 kaweth_new_code_fix,
1002 len_kaweth_new_code_fix,
1003 100,
1004 3)) < 0) {
fbe2bafc 1005 err("Error downloading firmware fix (%d)", result);
1da177e4
LT		 1006 goto err_fw;
1007 }
1008
1009 if ((result = kaweth_download_firmware(kaweth,
1010 kaweth_trigger_code,
1011 len_kaweth_trigger_code,
1012 126,
1013 2)) < 0) {
fbe2bafc 1014 err("Error downloading trigger code (%d)", result);
1da177e4
LT		 1015 goto err_fw;
1016
1017 }
1018
1019 if ((result = kaweth_download_firmware(kaweth,
1020 kaweth_trigger_code_fix,
1021 len_kaweth_trigger_code_fix,
1022 126,
1023 3)) < 0) {
fbe2bafc 1024 err("Error downloading trigger code fix (%d)", result);
1da177e4
LT		 1025 goto err_fw;
1026 }
1027
1028
1029 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
fbe2bafc 1030 err("Error triggering firmware (%d)", result);
1da177e4
LT		 1031 goto err_fw;
1032 }
1033
1034 /* Device will now disappear for a moment... */
fbe2bafc 1035 info("Firmware loaded. I'll be back...");
1da177e4
LT		 1036err_fw:
1037 free_page((unsigned long)kaweth->firmware_buf);
1038 free_netdev(netdev);
1039 return -EIO;
1040 }
1041
1042 result = kaweth_read_configuration(kaweth);
1043
1044 if(result < 0) {
fbe2bafc 1045 err("Error reading configuration (%d), no net device created", result);
1da177e4
LT		 1046 goto err_free_netdev;
1047 }
1048
fbe2bafc
ON		 1049 info("Statistics collection: %x", kaweth->configuration.statistics_mask);
1050 info("Multicast filter limit: %x", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
1051 info("MTU: %d", le16_to_cpu(kaweth->configuration.segment_size));
1052 info("Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
1da177e4
LT		 1053 (int)kaweth->configuration.hw_addr[0],
1054 (int)kaweth->configuration.hw_addr[1],
1055 (int)kaweth->configuration.hw_addr[2],
1056 (int)kaweth->configuration.hw_addr[3],
1057 (int)kaweth->configuration.hw_addr[4],
1058 (int)kaweth->configuration.hw_addr[5]);
1059
1060 if(!memcmp(&kaweth->configuration.hw_addr,
1061 &bcast_addr,
1062 sizeof(bcast_addr))) {
fbe2bafc 1063 err("Firmware not functioning properly, no net device created");
1da177e4
LT		 1064 goto err_free_netdev;
1065 }
1066
1067 if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
fbe2bafc 1068 dbg("Error setting URB size");
1da177e4
LT		 1069 goto err_free_netdev;
1070 }
1071
1072 if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
fbe2bafc 1073 err("Error setting SOFS wait");
1da177e4
LT		 1074 goto err_free_netdev;
1075 }
1076
1077 result = kaweth_set_receive_filter(kaweth,
1078 KAWETH_PACKET_FILTER_DIRECTED |
1079 KAWETH_PACKET_FILTER_BROADCAST |
1080 KAWETH_PACKET_FILTER_MULTICAST);
1081
1082 if(result < 0) {
fbe2bafc 1083 err("Error setting receive filter");
1da177e4
LT		 1084 goto err_free_netdev;
1085 }
1086
fbe2bafc 1087 dbg("Initializing net device.");
1da177e4
LT		 1088
1089 kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1090 if (!kaweth->tx_urb)
1091 goto err_free_netdev;
1092 kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1093 if (!kaweth->rx_urb)
1094 goto err_only_tx;
1095 kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1096 if (!kaweth->irq_urb)
1097 goto err_tx_and_rx;
1098
1099 kaweth->intbuffer = usb_buffer_alloc( kaweth->dev,
1100 INTBUFFERSIZE,
1101 GFP_KERNEL,
1102 &kaweth->intbufferhandle);
1103 if (!kaweth->intbuffer)
1104 goto err_tx_and_rx_and_irq;
1105 kaweth->rx_buf = usb_buffer_alloc( kaweth->dev,
1106 KAWETH_BUF_SIZE,
1107 GFP_KERNEL,
1108 &kaweth->rxbufferhandle);
1109 if (!kaweth->rx_buf)
1110 goto err_all_but_rxbuf;
1111
1112 memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr));
1113 memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr,
1114 sizeof(kaweth->configuration.hw_addr));
1115
1116 netdev->open = kaweth_open;
1117 netdev->stop = kaweth_close;
1118
1119 netdev->watchdog_timeo = KAWETH_TX_TIMEOUT;
1120 netdev->tx_timeout = kaweth_tx_timeout;
1121
1122 netdev->hard_start_xmit = kaweth_start_xmit;
1123 netdev->set_multicast_list = kaweth_set_rx_mode;
1124 netdev->get_stats = kaweth_netdev_stats;
1125 netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size);
1126 SET_ETHTOOL_OPS(netdev, &ops);
1127
1128 /* kaweth is zeroed as part of alloc_netdev */
1129
c4028958 1130 INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl);
1da177e4
LT		 1131
1132 SET_MODULE_OWNER(netdev);
1133
1134 usb_set_intfdata(intf, kaweth);
1135
1136#if 0
1137// dma_supported() is deeply broken on almost all architectures
1138 if (dma_supported (&intf->dev, 0xffffffffffffffffULL))
1139 kaweth->net->features |= NETIF_F_HIGHDMA;
1140#endif
1141
1142 SET_NETDEV_DEV(netdev, &intf->dev);
1143 if (register_netdev(netdev) != 0) {
fbe2bafc 1144 err("Error registering netdev.");
1da177e4
LT		 1145 goto err_intfdata;
1146 }
1147
fbe2bafc 1148 info("kaweth interface created at %s", kaweth->net->name);
1da177e4 1149
fbe2bafc 1150 dbg("Kaweth probe returning.");
1da177e4
LT		 1151
1152 return 0;
1153
1154err_intfdata:
1155 usb_set_intfdata(intf, NULL);
1156 usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1157err_all_but_rxbuf:
1158 usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1159err_tx_and_rx_and_irq:
1160 usb_free_urb(kaweth->irq_urb);
1161err_tx_and_rx:
1162 usb_free_urb(kaweth->rx_urb);
1163err_only_tx:
1164 usb_free_urb(kaweth->tx_urb);
1165err_free_netdev:
1166 free_netdev(netdev);
1167
1168 return -EIO;
1169}
1170
1171/****************************************************************
1172 * kaweth_disconnect
1173 ****************************************************************/
1174static void kaweth_disconnect(struct usb_interface *intf)
1175{
1176 struct kaweth_device *kaweth = usb_get_intfdata(intf);
1177 struct net_device *netdev;
1178
fbe2bafc 1179 info("Unregistering");
1da177e4
LT		 1180
1181 usb_set_intfdata(intf, NULL);
1182 if (!kaweth) {
fbe2bafc 1183 warn("unregistering non-existant device");
1da177e4
LT		 1184 return;
1185 }
1186 netdev = kaweth->net;
1da177e4 1187
fbe2bafc 1188 dbg("Unregistering net device");
1da177e4
LT		 1189 unregister_netdev(netdev);
1190
1191 usb_free_urb(kaweth->rx_urb);
1192 usb_free_urb(kaweth->tx_urb);
1193 usb_free_urb(kaweth->irq_urb);
1194
1195 usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1196 usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1197
1198 free_netdev(netdev);
1199}
1200
1201
1202// FIXME this completion stuff is a modified clone of
1203// an OLD version of some stuff in usb.c ...
1204struct usb_api_data {
1205 wait_queue_head_t wqh;
1206 int done;
1207};
1208
1209/*-------------------------------------------------------------------*
1210 * completion handler for compatibility wrappers (sync control/bulk) *
1211 *-------------------------------------------------------------------*/
7d12e780 1212static void usb_api_blocking_completion(struct urb *urb)
1da177e4
LT		 1213{
1214 struct usb_api_data *awd = (struct usb_api_data *)urb->context;
1215
1216 awd->done=1;
1217 wake_up(&awd->wqh);
1218}
1219
1220/*-------------------------------------------------------------------*
1221 * COMPATIBILITY STUFF *
1222 *-------------------------------------------------------------------*/
1223
1224// Starts urb and waits for completion or timeout
1225static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
1226{
1227 struct usb_api_data awd;
1228 int status;
1229
1230 init_waitqueue_head(&awd.wqh);
1231 awd.done = 0;
1232
1233 urb->context = &awd;
1234 status = usb_submit_urb(urb, GFP_NOIO);
1235 if (status) {
1236 // something went wrong
1237 usb_free_urb(urb);
1238 return status;
1239 }
1240
1241 if (!wait_event_timeout(awd.wqh, awd.done, timeout)) {
1242 // timeout
fbe2bafc 1243 warn("usb_control/bulk_msg: timeout");
1da177e4
LT		 1244 usb_kill_urb(urb); // remove urb safely
1245 status = -ETIMEDOUT;
1246 }
1247 else {
1248 status = urb->status;
1249 }
1250
1251 if (actual_length) {
1252 *actual_length = urb->actual_length;
1253 }
1254
1255 usb_free_urb(urb);
1256 return status;
1257}
1258
1259/*-------------------------------------------------------------------*/
1260// returns status (negative) or length (positive)
1261static int kaweth_internal_control_msg(struct usb_device *usb_dev,
1262 unsigned int pipe,
1263 struct usb_ctrlrequest *cmd, void *data,
1264 int len, int timeout)
1265{
1266 struct urb *urb;
1267 int retv;
1268 int length;
1269
1270 urb = usb_alloc_urb(0, GFP_NOIO);
1271 if (!urb)
1272 return -ENOMEM;
1273
1274 usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data,
1275 len, usb_api_blocking_completion, NULL);
1276
1277 retv = usb_start_wait_urb(urb, timeout, &length);
1278 if (retv < 0) {
1279 return retv;
1280 }
1281 else {
1282 return length;
1283 }
1284}
1285
1286
1287/****************************************************************
1288 * kaweth_init
1289 ****************************************************************/
1290static int __init kaweth_init(void)
1291{
fbe2bafc 1292 dbg("Driver loading");
1da177e4
LT		 1293 return usb_register(&kaweth_driver);
1294}
1295
1296/****************************************************************
1297 * kaweth_exit
1298 ****************************************************************/
1299static void __exit kaweth_exit(void)
1300{
1301 usb_deregister(&kaweth_driver);
1302}
1303
1304module_init(kaweth_init);
1305module_exit(kaweth_exit);
1306
1307
1308
1309
1310
1311
1312
1313
1314
Linux 6.x block layer and io_uring tree(s)