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[mirror_ubuntu-artful-kernel.git] / drivers / net / usb / kaweth.c
CommitLineData
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:
1da177e4
LT		 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
1da177e4
LT		 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>
1da177e4
LT		 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>
1da177e4
LT		 56#include <linux/dma-mapping.h>
57#include <linux/wait.h>
79682499 58#include <linux/firmware.h>
1da177e4 59#include <asm/uaccess.h>
1da177e4
LT		 60#include <asm/byteorder.h>
61
62#undef DEBUG
63
1da177e4
LT		 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
2b2b2e35 69#define KAWETH_CONTROL_TIMEOUT (30000)
1da177e4
LT		 70
71#define KAWETH_STATUS_BROKEN 0x0000001
72#define KAWETH_STATUS_CLOSING 0x0000002
1a2ea1df
ON		 73#define KAWETH_STATUS_SUSPENDING 0x0000004
74
75#define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING)
1da177e4
LT		 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
1a2ea1df
ON		 102#define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED)
103
1da177e4
LT		 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");
79682499
DW		 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");
1da177e4
LT		 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);
1a2ea1df
ON		 124static int kaweth_suspend(struct usb_interface *intf, pm_message_t message);
125static int kaweth_resume(struct usb_interface *intf);
1da177e4
LT		 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 */
dacf4fc8 148 { USB_DEVICE(0x07c9, 0xb010) }, /* Allied Telesyn AT-USB10 USB Ethernet Adapter */
1da177e4
LT		 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 */
486ba2a9 164 { USB_DEVICE(0x1668, 0x0323) }, /* Actiontec USB Ethernet */
1da177e4
LT		 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 = {
1da177e4
LT		 175 .name = driver_name,
176 .probe = kaweth_probe,
177 .disconnect = kaweth_disconnect,
1a2ea1df
ON		 178 .suspend = kaweth_suspend,
179 .resume = kaweth_resume,
1da177e4 180 .id_table = usb_klsi_table,
b98b98f9 181 .supports_autosuspend = 1,
1da177e4
LT		 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;
ba2d3587 210} __packed;
1da177e4
LT		 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;
b98b98f9 228 struct usb_interface *intf;
1da177e4
LT		 229 struct net_device *net;
230 wait_queue_head_t term_wait;
231
232 struct urb *rx_urb;
233 struct urb *tx_urb;
234 struct urb *irq_urb;
235
236 dma_addr_t intbufferhandle;
237 __u8 *intbuffer;
238 dma_addr_t rxbufferhandle;
239 __u8 *rx_buf;
240
241
242 struct sk_buff *tx_skb;
243
244 __u8 *firmware_buf;
245 __u8 scratch[KAWETH_SCRATCH_SIZE];
246 __u16 packet_filter_bitmap;
247
248 struct kaweth_ethernet_configuration configuration;
249
250 struct net_device_stats stats;
251};
252
1da177e4
LT		 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;
051b982b 267 int retval;
1da177e4 268
fbe2bafc 269 dbg("kaweth_control()");
1da177e4
LT		 270
271 if(in_interrupt()) {
fbe2bafc 272 dbg("in_interrupt()");
1da177e4
LT		 273 return -EBUSY;
274 }
275
276 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
277
278 if (!dr) {
fbe2bafc 279 dbg("kmalloc() failed");
1da177e4
LT		 280 return -ENOMEM;
281 }
282
051b982b 283 dr->bRequestType = requesttype;
1da177e4 284 dr->bRequest = request;
da2bbdcc
HH		 285 dr->wValue = cpu_to_le16(value);
286 dr->wIndex = cpu_to_le16(index);
287 dr->wLength = cpu_to_le16(size);
1da177e4 288
051b982b
KC		 289 retval = kaweth_internal_control_msg(kaweth->dev,
290 pipe,
291 dr,
292 data,
293 size,
294 timeout);
295
296 kfree(dr);
297 return retval;
1da177e4
LT		 298}
299
300/****************************************************************
301 * kaweth_read_configuration
302 ****************************************************************/
303static int kaweth_read_configuration(struct kaweth_device *kaweth)
304{
305 int retval;
306
fbe2bafc 307 dbg("Reading kaweth configuration");
1da177e4
LT		 308
309 retval = kaweth_control(kaweth,
310 usb_rcvctrlpipe(kaweth->dev, 0),
311 KAWETH_COMMAND_GET_ETHERNET_DESC,
312 USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE,
313 0,
314 0,
315 (void *)&kaweth->configuration,
316 sizeof(kaweth->configuration),
317 KAWETH_CONTROL_TIMEOUT);
318
319 return retval;
320}
321
322/****************************************************************
323 * kaweth_set_urb_size
324 ****************************************************************/
325static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size)
326{
327 int retval;
328
fbe2bafc 329 dbg("Setting URB size to %d", (unsigned)urb_size);
1da177e4
LT		 330
331 retval = kaweth_control(kaweth,
332 usb_sndctrlpipe(kaweth->dev, 0),
333 KAWETH_COMMAND_SET_URB_SIZE,
334 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
335 urb_size,
336 0,
337 (void *)&kaweth->scratch,
338 0,
339 KAWETH_CONTROL_TIMEOUT);
340
341 return retval;
342}
343
344/****************************************************************
345 * kaweth_set_sofs_wait
346 ****************************************************************/
347static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait)
348{
349 int retval;
350
fbe2bafc 351 dbg("Set SOFS wait to %d", (unsigned)sofs_wait);
1da177e4
LT		 352
353 retval = kaweth_control(kaweth,
354 usb_sndctrlpipe(kaweth->dev, 0),
355 KAWETH_COMMAND_SET_SOFS_WAIT,
356 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
357 sofs_wait,
358 0,
359 (void *)&kaweth->scratch,
360 0,
361 KAWETH_CONTROL_TIMEOUT);
362
363 return retval;
364}
365
366/****************************************************************
367 * kaweth_set_receive_filter
368 ****************************************************************/
369static int kaweth_set_receive_filter(struct kaweth_device *kaweth,
370 __u16 receive_filter)
371{
372 int retval;
373
fbe2bafc 374 dbg("Set receive filter to %d", (unsigned)receive_filter);
1da177e4
LT		 375
376 retval = kaweth_control(kaweth,
377 usb_sndctrlpipe(kaweth->dev, 0),
378 KAWETH_COMMAND_SET_PACKET_FILTER,
379 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
380 receive_filter,
381 0,
382 (void *)&kaweth->scratch,
383 0,
384 KAWETH_CONTROL_TIMEOUT);
385
386 return retval;
387}
388
389/****************************************************************
390 * kaweth_download_firmware
391 ****************************************************************/
392static int kaweth_download_firmware(struct kaweth_device *kaweth,
79682499 393 const char *fwname,
1da177e4
LT		 394 __u8 interrupt,
395 __u8 type)
396{
79682499
DW		 397 const struct firmware *fw;
398 int data_len;
399 int ret;
400
401 ret = request_firmware(&fw, fwname, &kaweth->dev->dev);
402 if (ret) {
403 err("Firmware request failed\n");
404 return ret;
405 }
406
407 if (fw->size > KAWETH_FIRMWARE_BUF_SIZE) {
408 err("Firmware too big: %zu", fw->size);
1da177e4
LT		 409 return -ENOSPC;
410 }
79682499
DW		 411 data_len = fw->size;
412 memcpy(kaweth->firmware_buf, fw->data, fw->size);
1da177e4 413
79682499 414 release_firmware(fw);
1da177e4
LT		 415
416 kaweth->firmware_buf[2] = (data_len & 0xFF) - 7;
417 kaweth->firmware_buf[3] = data_len >> 8;
418 kaweth->firmware_buf[4] = type;
419 kaweth->firmware_buf[5] = interrupt;
420
fbe2bafc 421 dbg("High: %i, Low:%i", kaweth->firmware_buf[3],
1da177e4
LT		 422 kaweth->firmware_buf[2]);
423
fbe2bafc 424 dbg("Downloading firmware at %p to kaweth device at %p",
79682499 425 fw->data, kaweth);
fbe2bafc 426 dbg("Firmware length: %d", data_len);
1da177e4
LT		 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
fbe2bafc 454 dbg("Triggering firmware");
1da177e4
LT		 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
fbe2bafc 474 dbg("kaweth_reset(%p)", kaweth);
f0816ce3 475 result = usb_reset_configuration(kaweth->dev);
f2d45cd9 476 mdelay(10);
1da177e4 477
fbe2bafc 478 dbg("kaweth_reset() returns %d.",result);
1da177e4
LT		 479
480 return result;
481}
482
7d12e780 483static void kaweth_usb_receive(struct urb *);
55016f10 484static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t);
1da177e4
LT		 485
486/****************************************************************
487 int_callback
488*****************************************************************/
489
55016f10 490static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf)
1da177e4
LT		 491{
492 int status;
493
494 status = usb_submit_urb (kaweth->irq_urb, mf);
495 if (unlikely(status == -ENOMEM)) {
496 kaweth->suspend_lowmem_ctrl = 1;
497 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
498 } else {
499 kaweth->suspend_lowmem_ctrl = 0;
500 }
501
502 if (status)
503 err ("can't resubmit intr, %s-%s, status %d",
504 kaweth->dev->bus->bus_name,
505 kaweth->dev->devpath, status);
506}
507
7d12e780 508static void int_callback(struct urb *u)
1da177e4
LT		 509{
510 struct kaweth_device *kaweth = u->context;
511 int act_state;
c94cb314 512 int status = u->status;
1da177e4 513
c94cb314 514 switch (status) {
1da177e4
LT		 515 case 0: /* success */
516 break;
517 case -ECONNRESET: /* unlink */
518 case -ENOENT:
519 case -ESHUTDOWN:
520 return;
521 /* -EPIPE: should clear the halt */
522 default: /* error */
523 goto resubmit;
524 }
525
526 /* we check the link state to report changes */
527 if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) {
58125f95 528 if (act_state)
1da177e4
LT		 529 netif_carrier_on(kaweth->net);
530 else
531 netif_carrier_off(kaweth->net);
532
533 kaweth->linkstate = act_state;
534 }
535resubmit:
536 kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC);
537}
538
c4028958 539static void kaweth_resubmit_tl(struct work_struct *work)
1da177e4 540{
c4028958
DH		 541 struct kaweth_device *kaweth =
542 container_of(work, struct kaweth_device, lowmem_work.work);
1da177e4 543
1a2ea1df 544 if (IS_BLOCKED(kaweth->status))
1da177e4
LT		 545 return;
546
547 if (kaweth->suspend_lowmem_rx)
548 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
549
550 if (kaweth->suspend_lowmem_ctrl)
551 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
552}
553
554
555/****************************************************************
556 * kaweth_resubmit_rx_urb
557 ****************************************************************/
558static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth,
55016f10 559 gfp_t mem_flags)
1da177e4
LT		 560{
561 int result;
562
563 usb_fill_bulk_urb(kaweth->rx_urb,
564 kaweth->dev,
565 usb_rcvbulkpipe(kaweth->dev, 1),
566 kaweth->rx_buf,
567 KAWETH_BUF_SIZE,
568 kaweth_usb_receive,
569 kaweth);
570 kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
571 kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle;
572
573 if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) {
574 if (result == -ENOMEM) {
575 kaweth->suspend_lowmem_rx = 1;
576 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
577 }
fbe2bafc 578 err("resubmitting rx_urb %d failed", result);
1da177e4
LT		 579 } else {
580 kaweth->suspend_lowmem_rx = 0;
581 }
582
583 return result;
584}
585
586static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth);
587
588/****************************************************************
589 * kaweth_usb_receive
590 ****************************************************************/
7d12e780 591static void kaweth_usb_receive(struct urb *urb)
1da177e4
LT		 592{
593 struct kaweth_device *kaweth = urb->context;
594 struct net_device *net = kaweth->net;
c94cb314 595 int status = urb->status;
1da177e4
LT		 596
597 int count = urb->actual_length;
598 int count2 = urb->transfer_buffer_length;
599
600 __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf);
601
602 struct sk_buff *skb;
603
710b523a
LF		 604 if (unlikely(status == -EPIPE)) {
605 kaweth->stats.rx_errors++;
1da177e4
LT		 606 kaweth->end = 1;
607 wake_up(&kaweth->term_wait);
710b523a 608 dbg("Status was -EPIPE.");
1da177e4
LT		 609 return;
610 }
710b523a
LF		 611 if (unlikely(status == -ECONNRESET || status == -ESHUTDOWN)) {
612 /* we are killed - set a flag and wake the disconnect handler */
613 kaweth->end = 1;
614 wake_up(&kaweth->term_wait);
615 dbg("Status was -ECONNRESET or -ESHUTDOWN.");
616 return;
617 }
618 if (unlikely(status == -EPROTO || status == -ETIME ||
619 status == -EILSEQ)) {
620 kaweth->stats.rx_errors++;
621 dbg("Status was -EPROTO, -ETIME, or -EILSEQ.");
622 return;
623 }
624 if (unlikely(status == -EOVERFLOW)) {
625 kaweth->stats.rx_errors++;
626 dbg("Status was -EOVERFLOW.");
627 }
1a2ea1df
ON		 628 spin_lock(&kaweth->device_lock);
629 if (IS_BLOCKED(kaweth->status)) {
630 spin_unlock(&kaweth->device_lock);
1da177e4 631 return;
1a2ea1df
ON		 632 }
633 spin_unlock(&kaweth->device_lock);
1da177e4 634
c94cb314 635 if(status && status != -EREMOTEIO && count != 1) {
fbe2bafc 636 err("%s RX status: %d count: %d packet_len: %d",
1da177e4 637 net->name,
c94cb314 638 status,
1da177e4
LT		 639 count,
640 (int)pkt_len);
641 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
642 return;
643 }
644
645 if(kaweth->net && (count > 2)) {
646 if(pkt_len > (count - 2)) {
fbe2bafc
ON		 647 err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count);
648 err("Packet len & 2047: %x", pkt_len & 2047);
649 err("Count 2: %x", count2);
1da177e4
LT		 650 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
651 return;
652 }
653
654 if(!(skb = dev_alloc_skb(pkt_len+2))) {
655 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
656 return;
657 }
658
659 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
660
8c7b7faa 661 skb_copy_to_linear_data(skb, kaweth->rx_buf + 2, pkt_len);
1da177e4
LT		 662
663 skb_put(skb, pkt_len);
664
665 skb->protocol = eth_type_trans(skb, net);
666
667 netif_rx(skb);
668
669 kaweth->stats.rx_packets++;
670 kaweth->stats.rx_bytes += pkt_len;
671 }
672
673 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
674}
675
676/****************************************************************
677 * kaweth_open
678 ****************************************************************/
679static int kaweth_open(struct net_device *net)
680{
681 struct kaweth_device *kaweth = netdev_priv(net);
682 int res;
683
fbe2bafc 684 dbg("Opening network device.");
1da177e4 685
b98b98f9
ON		 686 res = usb_autopm_get_interface(kaweth->intf);
687 if (res) {
688 err("Interface cannot be resumed.");
689 return -EIO;
690 }
1da177e4
LT		 691 res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL);
692 if (res)
b98b98f9 693 goto err_out;
1da177e4
LT		 694
695 usb_fill_int_urb(
696 kaweth->irq_urb,
697 kaweth->dev,
698 usb_rcvintpipe(kaweth->dev, 3),
699 kaweth->intbuffer,
700 INTBUFFERSIZE,
701 int_callback,
702 kaweth,
703 250); /* overriding the descriptor */
704 kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle;
705 kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
706
707 res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL);
708 if (res) {
709 usb_kill_urb(kaweth->rx_urb);
b98b98f9 710 goto err_out;
1da177e4 711 }
1a2ea1df 712 kaweth->opened = 1;
1da177e4
LT		 713
714 netif_start_queue(net);
715
716 kaweth_async_set_rx_mode(kaweth);
717 return 0;
b98b98f9
ON		 718
719err_out:
ceb0c77e 720 usb_autopm_put_interface(kaweth->intf);
b98b98f9 721 return -EIO;
1da177e4
LT		 722}
723
724/****************************************************************
b98b98f9 725 * kaweth_kill_urbs
1da177e4 726 ****************************************************************/
1a2ea1df 727static void kaweth_kill_urbs(struct kaweth_device *kaweth)
1da177e4 728{
1da177e4
LT		 729 usb_kill_urb(kaweth->irq_urb);
730 usb_kill_urb(kaweth->rx_urb);
d23b536b 731 usb_kill_urb(kaweth->tx_urb);
1da177e4 732
4bb073c0 733 cancel_delayed_work_sync(&kaweth->lowmem_work);
1da177e4
LT		 734
735 /* a scheduled work may have resubmitted,
736 we hit them again */
737 usb_kill_urb(kaweth->irq_urb);
738 usb_kill_urb(kaweth->rx_urb);
1a2ea1df
ON		 739}
740
741/****************************************************************
742 * kaweth_close
743 ****************************************************************/
744static int kaweth_close(struct net_device *net)
745{
746 struct kaweth_device *kaweth = netdev_priv(net);
747
748 netif_stop_queue(net);
749 kaweth->opened = 0;
750
751 kaweth->status |= KAWETH_STATUS_CLOSING;
752
753 kaweth_kill_urbs(kaweth);
1da177e4
LT		 754
755 kaweth->status &= ~KAWETH_STATUS_CLOSING;
756
ceb0c77e 757 usb_autopm_put_interface(kaweth->intf);
b98b98f9 758
1da177e4
LT		 759 return 0;
760}
761
762static void kaweth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
763{
b3ebd522 764 struct kaweth_device *kaweth = netdev_priv(dev);
1da177e4
LT		 765
766 strlcpy(info->driver, driver_name, sizeof(info->driver));
b3ebd522
ON		 767 usb_make_path(kaweth->dev, info->bus_info, sizeof (info->bus_info));
768}
769
770static u32 kaweth_get_link(struct net_device *dev)
771{
772 struct kaweth_device *kaweth = netdev_priv(dev);
773
774 return kaweth->linkstate;
1da177e4
LT		 775}
776
0fc0b732 777static const struct ethtool_ops ops = {
b3ebd522
ON		 778 .get_drvinfo = kaweth_get_drvinfo,
779 .get_link = kaweth_get_link
1da177e4
LT		 780};
781
782/****************************************************************
783 * kaweth_usb_transmit_complete
784 ****************************************************************/
7d12e780 785static void kaweth_usb_transmit_complete(struct urb *urb)
1da177e4
LT		 786{
787 struct kaweth_device *kaweth = urb->context;
788 struct sk_buff *skb = kaweth->tx_skb;
c94cb314 789 int status = urb->status;
1da177e4 790
c94cb314
ON		 791 if (unlikely(status != 0))
792 if (status != -ENOENT)
793 dbg("%s: TX status %d.", kaweth->net->name, status);
1da177e4
LT		 794
795 netif_wake_queue(kaweth->net);
796 dev_kfree_skb_irq(skb);
797}
798
799/****************************************************************
800 * kaweth_start_xmit
801 ****************************************************************/
25a79c41
SH		 802static netdev_tx_t kaweth_start_xmit(struct sk_buff *skb,
803 struct net_device *net)
1da177e4
LT		 804{
805 struct kaweth_device *kaweth = netdev_priv(net);
806 __le16 *private_header;
807
808 int res;
809
4ff61c8f 810 spin_lock_irq(&kaweth->device_lock);
1da177e4 811
1da177e4
LT		 812 kaweth_async_set_rx_mode(kaweth);
813 netif_stop_queue(net);
1a2ea1df
ON		 814 if (IS_BLOCKED(kaweth->status)) {
815 goto skip;
816 }
1da177e4
LT		 817
818 /* We now decide whether we can put our special header into the sk_buff */
819 if (skb_cloned(skb) || skb_headroom(skb) < 2) {
820 /* no such luck - we make our own */
821 struct sk_buff *copied_skb;
822 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC);
823 dev_kfree_skb_irq(skb);
824 skb = copied_skb;
825 if (!copied_skb) {
826 kaweth->stats.tx_errors++;
827 netif_start_queue(net);
4ff61c8f 828 spin_unlock_irq(&kaweth->device_lock);
6ed10654 829 return NETDEV_TX_OK;
1da177e4
LT		 830 }
831 }
832
833 private_header = (__le16 *)__skb_push(skb, 2);
834 *private_header = cpu_to_le16(skb->len-2);
835 kaweth->tx_skb = skb;
836
837 usb_fill_bulk_urb(kaweth->tx_urb,
838 kaweth->dev,
839 usb_sndbulkpipe(kaweth->dev, 2),
840 private_header,
841 skb->len,
842 kaweth_usb_transmit_complete,
843 kaweth);
844 kaweth->end = 0;
1da177e4
LT		 845
846 if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
847 {
4dc89948 848 dev_warn(&net->dev, "kaweth failed tx_urb %d\n", res);
1a2ea1df 849skip:
1da177e4
LT		 850 kaweth->stats.tx_errors++;
851
852 netif_start_queue(net);
853 dev_kfree_skb_irq(skb);
854 }
855 else
856 {
857 kaweth->stats.tx_packets++;
858 kaweth->stats.tx_bytes += skb->len;
1da177e4
LT		 859 }
860
4ff61c8f 861 spin_unlock_irq(&kaweth->device_lock);
1da177e4 862
6ed10654 863 return NETDEV_TX_OK;
1da177e4
LT		 864}
865
866/****************************************************************
867 * kaweth_set_rx_mode
868 ****************************************************************/
869static void kaweth_set_rx_mode(struct net_device *net)
870{
871 struct kaweth_device *kaweth = netdev_priv(net);
872
873 __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
874 KAWETH_PACKET_FILTER_BROADCAST |
875 KAWETH_PACKET_FILTER_MULTICAST;
876
fbe2bafc 877 dbg("Setting Rx mode to %d", packet_filter_bitmap);
1da177e4
LT		 878
879 netif_stop_queue(net);
880
881 if (net->flags & IFF_PROMISC) {
882 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
883 }
4cd24eaf 884 else if (!netdev_mc_empty(net) || (net->flags & IFF_ALLMULTI)) {
1da177e4
LT		 885 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
886 }
887
888 kaweth->packet_filter_bitmap = packet_filter_bitmap;
889 netif_wake_queue(net);
890}
891
892/****************************************************************
893 * kaweth_async_set_rx_mode
894 ****************************************************************/
895static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
896{
710b523a 897 int result;
1da177e4 898 __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
710b523a 899
1da177e4
LT		 900 kaweth->packet_filter_bitmap = 0;
901 if (packet_filter_bitmap == 0)
902 return;
903
710b523a
LF		 904 if (in_interrupt())
905 return;
906
1da177e4
LT		 907 result = kaweth_control(kaweth,
908 usb_sndctrlpipe(kaweth->dev, 0),
909 KAWETH_COMMAND_SET_PACKET_FILTER,
910 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
911 packet_filter_bitmap,
912 0,
913 (void *)&kaweth->scratch,
914 0,
915 KAWETH_CONTROL_TIMEOUT);
916
917 if(result < 0) {
fbe2bafc 918 err("Failed to set Rx mode: %d", result);
1da177e4
LT		 919 }
920 else {
fbe2bafc 921 dbg("Set Rx mode to %d", packet_filter_bitmap);
1da177e4 922 }
1da177e4
LT		 923}
924
925/****************************************************************
926 * kaweth_netdev_stats
927 ****************************************************************/
928static 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 ****************************************************************/
937static void kaweth_tx_timeout(struct net_device *net)
938{
939 struct kaweth_device *kaweth = netdev_priv(net);
940
4dc89948 941 dev_warn(&net->dev, "%s: Tx timed out. Resetting.\n", net->name);
1da177e4
LT		 942 kaweth->stats.tx_errors++;
943 net->trans_start = jiffies;
944
945 usb_unlink_urb(kaweth->tx_urb);
946}
947
1a2ea1df
ON		 948/****************************************************************
949 * kaweth_suspend
950 ****************************************************************/
951static 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
b98b98f9 956 dbg("Suspending device");
1a2ea1df
ON		 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 ****************************************************************/
968static int kaweth_resume(struct usb_interface *intf)
969{
970 struct kaweth_device *kaweth = usb_get_intfdata(intf);
971 unsigned long flags;
972
b98b98f9 973 dbg("Resuming device");
1a2ea1df
ON		 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
1da177e4
LT		 986/****************************************************************
987 * kaweth_probe
988 ****************************************************************/
321ea8b2
ON		 989
990
991static const struct net_device_ops kaweth_netdev_ops = {
992 .ndo_open = kaweth_open,
993 .ndo_stop = kaweth_close,
994 .ndo_start_xmit = kaweth_start_xmit,
995 .ndo_tx_timeout = kaweth_tx_timeout,
996 .ndo_set_multicast_list = kaweth_set_rx_mode,
997 .ndo_get_stats = kaweth_netdev_stats,
635ecaa7 998 .ndo_change_mtu = eth_change_mtu,
240c102d
BH		 999 .ndo_set_mac_address = eth_mac_addr,
1000 .ndo_validate_addr = eth_validate_addr,
321ea8b2
ON		 1001};
1002
1da177e4
LT		 1003static int kaweth_probe(
1004 struct usb_interface *intf,
1005 const struct usb_device_id *id /* from id_table */
1006 )
1007{
1008 struct usb_device *dev = interface_to_usbdev(intf);
1009 struct kaweth_device *kaweth;
1010 struct net_device *netdev;
1011 const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
1012 int result = 0;
1013
fbe2bafc 1014 dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x",
1da177e4
LT		 1015 dev->devnum,
1016 le16_to_cpu(dev->descriptor.idVendor),
1017 le16_to_cpu(dev->descriptor.idProduct),
1018 le16_to_cpu(dev->descriptor.bcdDevice));
1019
fbe2bafc 1020 dbg("Device at %p", dev);
1da177e4 1021
fbe2bafc 1022 dbg("Descriptor length: %x type: %x",
1da177e4
LT		 1023 (int)dev->descriptor.bLength,
1024 (int)dev->descriptor.bDescriptorType);
1025
1026 netdev = alloc_etherdev(sizeof(*kaweth));
1027 if (!netdev)
1028 return -ENOMEM;
1029
1030 kaweth = netdev_priv(netdev);
1031 kaweth->dev = dev;
1032 kaweth->net = netdev;
1033
1034 spin_lock_init(&kaweth->device_lock);
1035 init_waitqueue_head(&kaweth->term_wait);
1036
fbe2bafc 1037 dbg("Resetting.");
1da177e4
LT		 1038
1039 kaweth_reset(kaweth);
1040
1041 /*
1042 * If high byte of bcdDevice is nonzero, firmware is already
1043 * downloaded. Don't try to do it again, or we'll hang the device.
1044 */
1045
1046 if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) {
880c9c66 1047 dev_info(&intf->dev, "Firmware present in device.\n");
1da177e4
LT		 1048 } else {
1049 /* Download the firmware */
880c9c66 1050 dev_info(&intf->dev, "Downloading firmware...\n");
1da177e4
LT		 1051 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
1052 if ((result = kaweth_download_firmware(kaweth,
79682499 1053 "kaweth/new_code.bin",
1da177e4
LT		 1054 100,
1055 2)) < 0) {
fbe2bafc 1056 err("Error downloading firmware (%d)", result);
1da177e4
LT		 1057 goto err_fw;
1058 }
1059
1060 if ((result = kaweth_download_firmware(kaweth,
79682499 1061 "kaweth/new_code_fix.bin",
1da177e4
LT		 1062 100,
1063 3)) < 0) {
fbe2bafc 1064 err("Error downloading firmware fix (%d)", result);
1da177e4
LT		 1065 goto err_fw;
1066 }
1067
1068 if ((result = kaweth_download_firmware(kaweth,
79682499 1069 "kaweth/trigger_code.bin",
1da177e4
LT		 1070 126,
1071 2)) < 0) {
fbe2bafc 1072 err("Error downloading trigger code (%d)", result);
1da177e4
LT		 1073 goto err_fw;
1074
1075 }
1076
1077 if ((result = kaweth_download_firmware(kaweth,
79682499 1078 "kaweth/trigger_code_fix.bin",
1da177e4
LT		 1079 126,
1080 3)) < 0) {
fbe2bafc 1081 err("Error downloading trigger code fix (%d)", result);
1da177e4
LT		 1082 goto err_fw;
1083 }
1084
1085
1086 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
fbe2bafc 1087 err("Error triggering firmware (%d)", result);
1da177e4
LT		 1088 goto err_fw;
1089 }
1090
1091 /* Device will now disappear for a moment... */
880c9c66 1092 dev_info(&intf->dev, "Firmware loaded. I'll be back...\n");
1da177e4
LT		 1093err_fw:
1094 free_page((unsigned long)kaweth->firmware_buf);
1095 free_netdev(netdev);
1096 return -EIO;
1097 }
1098
1099 result = kaweth_read_configuration(kaweth);
1100
1101 if(result < 0) {
fbe2bafc 1102 err("Error reading configuration (%d), no net device created", result);
1da177e4
LT		 1103 goto err_free_netdev;
1104 }
1105
880c9c66
GKH		 1106 dev_info(&intf->dev, "Statistics collection: %x\n", kaweth->configuration.statistics_mask);
1107 dev_info(&intf->dev, "Multicast filter limit: %x\n", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
1108 dev_info(&intf->dev, "MTU: %d\n", le16_to_cpu(kaweth->configuration.segment_size));
1109 dev_info(&intf->dev, "Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x\n",
1da177e4
LT		 1110 (int)kaweth->configuration.hw_addr[0],
1111 (int)kaweth->configuration.hw_addr[1],
1112 (int)kaweth->configuration.hw_addr[2],
1113 (int)kaweth->configuration.hw_addr[3],
1114 (int)kaweth->configuration.hw_addr[4],
1115 (int)kaweth->configuration.hw_addr[5]);
1116
1117 if(!memcmp(&kaweth->configuration.hw_addr,
1118 &bcast_addr,
1119 sizeof(bcast_addr))) {
fbe2bafc 1120 err("Firmware not functioning properly, no net device created");
1da177e4
LT		 1121 goto err_free_netdev;
1122 }
1123
1124 if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
fbe2bafc 1125 dbg("Error setting URB size");
1da177e4
LT		 1126 goto err_free_netdev;
1127 }
1128
1129 if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
fbe2bafc 1130 err("Error setting SOFS wait");
1da177e4
LT		 1131 goto err_free_netdev;
1132 }
1133
1134 result = kaweth_set_receive_filter(kaweth,
1135 KAWETH_PACKET_FILTER_DIRECTED |
1136 KAWETH_PACKET_FILTER_BROADCAST |
1137 KAWETH_PACKET_FILTER_MULTICAST);
1138
1139 if(result < 0) {
fbe2bafc 1140 err("Error setting receive filter");
1da177e4
LT		 1141 goto err_free_netdev;
1142 }
1143
fbe2bafc 1144 dbg("Initializing net device.");
1da177e4 1145
b98b98f9
ON		 1146 kaweth->intf = intf;
1147
1da177e4
LT		 1148 kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1149 if (!kaweth->tx_urb)
1150 goto err_free_netdev;
1151 kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1152 if (!kaweth->rx_urb)
1153 goto err_only_tx;
1154 kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1155 if (!kaweth->irq_urb)
1156 goto err_tx_and_rx;
1157
997ea58e 1158 kaweth->intbuffer = usb_alloc_coherent( kaweth->dev,
1da177e4
LT		 1159 INTBUFFERSIZE,
1160 GFP_KERNEL,
1161 &kaweth->intbufferhandle);
1162 if (!kaweth->intbuffer)
1163 goto err_tx_and_rx_and_irq;
997ea58e 1164 kaweth->rx_buf = usb_alloc_coherent( kaweth->dev,
1da177e4
LT		 1165 KAWETH_BUF_SIZE,
1166 GFP_KERNEL,
1167 &kaweth->rxbufferhandle);
1168 if (!kaweth->rx_buf)
1169 goto err_all_but_rxbuf;
1170
1171 memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr));
1172 memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr,
1173 sizeof(kaweth->configuration.hw_addr));
1174
321ea8b2 1175 netdev->netdev_ops = &kaweth_netdev_ops;
1da177e4 1176 netdev->watchdog_timeo = KAWETH_TX_TIMEOUT;
1da177e4
LT		 1177 netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size);
1178 SET_ETHTOOL_OPS(netdev, &ops);
1179
1180 /* kaweth is zeroed as part of alloc_netdev */
c4028958 1181 INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl);
1da177e4
LT		 1182 usb_set_intfdata(intf, kaweth);
1183
1184#if 0
1185// dma_supported() is deeply broken on almost all architectures
1186 if (dma_supported (&intf->dev, 0xffffffffffffffffULL))
1187 kaweth->net->features |= NETIF_F_HIGHDMA;
1188#endif
1189
1190 SET_NETDEV_DEV(netdev, &intf->dev);
1191 if (register_netdev(netdev) != 0) {
fbe2bafc 1192 err("Error registering netdev.");
1da177e4
LT		 1193 goto err_intfdata;
1194 }
1195
880c9c66
GKH		 1196 dev_info(&intf->dev, "kaweth interface created at %s\n",
1197 kaweth->net->name);
1da177e4 1198
fbe2bafc 1199 dbg("Kaweth probe returning.");
1da177e4
LT		 1200
1201 return 0;
1202
1203err_intfdata:
1204 usb_set_intfdata(intf, NULL);
997ea58e 1205 usb_free_coherent(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1da177e4 1206err_all_but_rxbuf:
997ea58e 1207 usb_free_coherent(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1da177e4
LT		 1208err_tx_and_rx_and_irq:
1209 usb_free_urb(kaweth->irq_urb);
1210err_tx_and_rx:
1211 usb_free_urb(kaweth->rx_urb);
1212err_only_tx:
1213 usb_free_urb(kaweth->tx_urb);
1214err_free_netdev:
1215 free_netdev(netdev);
1216
1217 return -EIO;
1218}
1219
1220/****************************************************************
1221 * kaweth_disconnect
1222 ****************************************************************/
1223static void kaweth_disconnect(struct usb_interface *intf)
1224{
1225 struct kaweth_device *kaweth = usb_get_intfdata(intf);
1226 struct net_device *netdev;
1227
880c9c66 1228 dev_info(&intf->dev, "Unregistering\n");
1da177e4
LT		 1229
1230 usb_set_intfdata(intf, NULL);
1231 if (!kaweth) {
4dc89948 1232 dev_warn(&intf->dev, "unregistering non-existant device\n");
1da177e4
LT		 1233 return;
1234 }
1235 netdev = kaweth->net;
1da177e4 1236
fbe2bafc 1237 dbg("Unregistering net device");
1da177e4
LT		 1238 unregister_netdev(netdev);
1239
1240 usb_free_urb(kaweth->rx_urb);
1241 usb_free_urb(kaweth->tx_urb);
1242 usb_free_urb(kaweth->irq_urb);
1243
997ea58e
DM		 1244 usb_free_coherent(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1245 usb_free_coherent(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1da177e4
LT		 1246
1247 free_netdev(netdev);
1248}
1249
1250
1251// FIXME this completion stuff is a modified clone of
1252// an OLD version of some stuff in usb.c ...
1253struct usb_api_data {
1254 wait_queue_head_t wqh;
1255 int done;
1256};
1257
1258/*-------------------------------------------------------------------*
1259 * completion handler for compatibility wrappers (sync control/bulk) *
1260 *-------------------------------------------------------------------*/
7d12e780 1261static void usb_api_blocking_completion(struct urb *urb)
1da177e4
LT		 1262{
1263 struct usb_api_data *awd = (struct usb_api_data *)urb->context;
1264
1265 awd->done=1;
1266 wake_up(&awd->wqh);
1267}
1268
1269/*-------------------------------------------------------------------*
1270 * COMPATIBILITY STUFF *
1271 *-------------------------------------------------------------------*/
1272
1273// Starts urb and waits for completion or timeout
1274static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
1275{
1276 struct usb_api_data awd;
1277 int status;
1278
1279 init_waitqueue_head(&awd.wqh);
1280 awd.done = 0;
1281
1282 urb->context = &awd;
1283 status = usb_submit_urb(urb, GFP_NOIO);
1284 if (status) {
1285 // something went wrong
1286 usb_free_urb(urb);
1287 return status;
1288 }
1289
1290 if (!wait_event_timeout(awd.wqh, awd.done, timeout)) {
1291 // timeout
4dc89948 1292 dev_warn(&urb->dev->dev, "usb_control/bulk_msg: timeout\n");
1da177e4
LT		 1293 usb_kill_urb(urb); // remove urb safely
1294 status = -ETIMEDOUT;
1295 }
1296 else {
1297 status = urb->status;
1298 }
1299
1300 if (actual_length) {
1301 *actual_length = urb->actual_length;
1302 }
1303
1304 usb_free_urb(urb);
1305 return status;
1306}
1307
1308/*-------------------------------------------------------------------*/
1309// returns status (negative) or length (positive)
1310static int kaweth_internal_control_msg(struct usb_device *usb_dev,
1311 unsigned int pipe,
1312 struct usb_ctrlrequest *cmd, void *data,
1313 int len, int timeout)
1314{
1315 struct urb *urb;
1316 int retv;
b98b98f9 1317 int length = 0; /* shut up GCC */
1da177e4
LT		 1318
1319 urb = usb_alloc_urb(0, GFP_NOIO);
1320 if (!urb)
1321 return -ENOMEM;
1322
1323 usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data,
1324 len, usb_api_blocking_completion, NULL);
1325
1326 retv = usb_start_wait_urb(urb, timeout, &length);
1327 if (retv < 0) {
1328 return retv;
1329 }
1330 else {
1331 return length;
1332 }
1333}
1334
1335
1336/****************************************************************
1337 * kaweth_init
1338 ****************************************************************/
1339static int __init kaweth_init(void)
1340{
fbe2bafc 1341 dbg("Driver loading");
1da177e4
LT		 1342 return usb_register(&kaweth_driver);
1343}
1344
1345/****************************************************************
1346 * kaweth_exit
1347 ****************************************************************/
1348static void __exit kaweth_exit(void)
1349{
1350 usb_deregister(&kaweth_driver);
1351}
1352
1353module_init(kaweth_init);
1354module_exit(kaweth_exit);
1355
1356
1357
1358
1359
1360
1361
1362
1363
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