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/drivers/net/usb/kaweth.c

https://bitbucket.org/ndreys/linux-sunxi
C | 1355 lines | 949 code | 240 blank | 166 comment | 93 complexity | 30918a539b2f61248c2901eb0e409d58 MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
   1/****************************************************************
   2 *
   3 *     kaweth.c - driver for KL5KUSB101 based USB->Ethernet
   4 *
   5 *     (c) 2000 Interlan Communications
   6 *     (c) 2000 Stephane Alnet
   7 *     (C) 2001 Brad Hards
   8 *     (C) 2002 Oliver Neukum
   9 *
  10 *     Original author: The Zapman <zapman@interlan.net>
  11 *     Inspired by, and much credit goes to Michael Rothwell
  12 *     <rothwell@interlan.net> for the test equipment, help, and patience
  13 *     Based off of (and with thanks to) Petko Manolov's pegaus.c driver.
  14 *     Also many thanks to Joel Silverman and Ed Surprenant at Kawasaki
  15 *     for providing the firmware and driver resources.
  16 *
  17 *     This program is free software; you can redistribute it and/or
  18 *     modify it under the terms of the GNU General Public License as
  19 *     published by the Free Software Foundation; either version 2, or
  20 *     (at your option) any later version.
  21 *
  22 *     This program is distributed in the hope that it will be useful,
  23 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
  24 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25 *     GNU General Public License for more details.
  26 *
  27 *     You should have received a copy of the GNU General Public License
  28 *     along with this program; if not, write to the Free Software Foundation,
  29 *     Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  30 *
  31 ****************************************************************/
  32
  33/* TODO:
  34 * Develop test procedures for USB net interfaces
  35 * Run test procedures
  36 * Fix bugs from previous two steps
  37 * Snoop other OSs for any tricks we're not doing
  38 * Reduce arbitrary timeouts
  39 * Smart multicast support
  40 * Temporary MAC change support
  41 * Tunable SOFs parameter - ioctl()?
  42 * Ethernet stats collection
  43 * Code formatting improvements
  44 */
  45
  46#include <linux/module.h>
  47#include <linux/slab.h>
  48#include <linux/string.h>
  49#include <linux/init.h>
  50#include <linux/delay.h>
  51#include <linux/netdevice.h>
  52#include <linux/etherdevice.h>
  53#include <linux/usb.h>
  54#include <linux/types.h>
  55#include <linux/ethtool.h>
  56#include <linux/dma-mapping.h>
  57#include <linux/wait.h>
  58#include <linux/firmware.h>
  59#include <asm/uaccess.h>
  60#include <asm/byteorder.h>
  61
  62#undef DEBUG
  63
  64#define KAWETH_MTU			1514
  65#define KAWETH_BUF_SIZE			1664
  66#define KAWETH_TX_TIMEOUT		(5 * HZ)
  67#define KAWETH_SCRATCH_SIZE		32
  68#define KAWETH_FIRMWARE_BUF_SIZE	4096
  69#define KAWETH_CONTROL_TIMEOUT		(30000)
  70
  71#define KAWETH_STATUS_BROKEN		0x0000001
  72#define KAWETH_STATUS_CLOSING		0x0000002
  73#define KAWETH_STATUS_SUSPENDING	0x0000004
  74
  75#define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING)
  76
  77#define KAWETH_PACKET_FILTER_PROMISCUOUS	0x01
  78#define KAWETH_PACKET_FILTER_ALL_MULTICAST	0x02
  79#define KAWETH_PACKET_FILTER_DIRECTED		0x04
  80#define KAWETH_PACKET_FILTER_BROADCAST		0x08
  81#define KAWETH_PACKET_FILTER_MULTICAST		0x10
  82
  83/* Table 7 */
  84#define KAWETH_COMMAND_GET_ETHERNET_DESC	0x00
  85#define KAWETH_COMMAND_MULTICAST_FILTERS        0x01
  86#define KAWETH_COMMAND_SET_PACKET_FILTER	0x02
  87#define KAWETH_COMMAND_STATISTICS               0x03
  88#define KAWETH_COMMAND_SET_TEMP_MAC     	0x06
  89#define KAWETH_COMMAND_GET_TEMP_MAC             0x07
  90#define KAWETH_COMMAND_SET_URB_SIZE		0x08
  91#define KAWETH_COMMAND_SET_SOFS_WAIT		0x09
  92#define KAWETH_COMMAND_SCAN			0xFF
  93
  94#define KAWETH_SOFS_TO_WAIT			0x05
  95
  96#define INTBUFFERSIZE				4
  97
  98#define STATE_OFFSET				0
  99#define STATE_MASK				0x40
 100#define	STATE_SHIFT				5
 101
 102#define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED)
 103
 104
 105MODULE_AUTHOR("Michael Zappe <zapman@interlan.net>, Stephane Alnet <stephane@u-picardie.fr>, Brad Hards <bhards@bigpond.net.au> and Oliver Neukum <oliver@neukum.org>");
 106MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver");
 107MODULE_LICENSE("GPL");
 108MODULE_FIRMWARE("kaweth/new_code.bin");
 109MODULE_FIRMWARE("kaweth/new_code_fix.bin");
 110MODULE_FIRMWARE("kaweth/trigger_code.bin");
 111MODULE_FIRMWARE("kaweth/trigger_code_fix.bin");
 112
 113static const char driver_name[] = "kaweth";
 114
 115static int kaweth_probe(
 116		struct usb_interface *intf,
 117		const struct usb_device_id *id	/* from id_table */
 118	);
 119static void kaweth_disconnect(struct usb_interface *intf);
 120static int kaweth_internal_control_msg(struct usb_device *usb_dev,
 121				       unsigned int pipe,
 122				       struct usb_ctrlrequest *cmd, void *data,
 123				       int len, int timeout);
 124static int kaweth_suspend(struct usb_interface *intf, pm_message_t message);
 125static int kaweth_resume(struct usb_interface *intf);
 126
 127/****************************************************************
 128 *     usb_device_id
 129 ****************************************************************/
 130static struct usb_device_id usb_klsi_table[] = {
 131	{ USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */
 132	{ USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */
 133	{ USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */
 134	{ USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */
 135	{ USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */
 136	{ USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */
 137	{ USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */
 138	{ USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */
 139	{ USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */
 140	{ USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */
 141	{ USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */
 142	{ USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */
 143	{ USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */
 144	{ USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */
 145	{ USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */
 146	{ USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */
 147	{ USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */
 148	{ USB_DEVICE(0x07c9, 0xb010) }, /* Allied Telesyn AT-USB10 USB Ethernet Adapter */
 149	{ USB_DEVICE(0x0846, 0x1001) }, /* NetGear EA-101 */
 150	{ USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */
 151	{ USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */
 152	{ USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */
 153	{ USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */
 154	{ USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */
 155	{ USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */
 156	{ USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */
 157	{ USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */
 158	{ USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */
 159	{ USB_DEVICE(0x1485, 0x0001) },	/* Silicom U2E */
 160	{ USB_DEVICE(0x1485, 0x0002) }, /* Psion Dacom Gold Port Ethernet */
 161	{ USB_DEVICE(0x1645, 0x0005) }, /* Entrega E45 */
 162	{ USB_DEVICE(0x1645, 0x0008) }, /* Entrega USB Ethernet Adapter */
 163	{ USB_DEVICE(0x1645, 0x8005) }, /* PortGear Ethernet Adapter */
 164	{ USB_DEVICE(0x1668, 0x0323) }, /* Actiontec USB Ethernet */
 165	{ USB_DEVICE(0x2001, 0x4000) }, /* D-link DSB-650C */
 166	{} /* Null terminator */
 167};
 168
 169MODULE_DEVICE_TABLE (usb, usb_klsi_table);
 170
 171/****************************************************************
 172 *     kaweth_driver
 173 ****************************************************************/
 174static struct usb_driver kaweth_driver = {
 175	.name =		driver_name,
 176	.probe =	kaweth_probe,
 177	.disconnect =	kaweth_disconnect,
 178	.suspend =	kaweth_suspend,
 179	.resume =	kaweth_resume,
 180	.id_table =     usb_klsi_table,
 181	.supports_autosuspend =	1,
 182};
 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} __packed;
 211
 212/****************************************************************
 213 *     kaweth_device
 214 ****************************************************************/
 215struct kaweth_device
 216{
 217	spinlock_t device_lock;
 218
 219	__u32 status;
 220	int end;
 221	int suspend_lowmem_rx;
 222	int suspend_lowmem_ctrl;
 223	int linkstate;
 224	int opened;
 225	struct delayed_work lowmem_work;
 226
 227	struct usb_device *dev;
 228	struct usb_interface *intf;
 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
 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	int retval;
 268
 269	dbg("kaweth_control()");
 270
 271	if(in_interrupt()) {
 272		dbg("in_interrupt()");
 273		return -EBUSY;
 274	}
 275
 276	dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
 277
 278	if (!dr) {
 279		dbg("kmalloc() failed");
 280		return -ENOMEM;
 281	}
 282
 283	dr->bRequestType = requesttype;
 284	dr->bRequest = request;
 285	dr->wValue = cpu_to_le16(value);
 286	dr->wIndex = cpu_to_le16(index);
 287	dr->wLength = cpu_to_le16(size);
 288
 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;
 298}
 299
 300/****************************************************************
 301 *     kaweth_read_configuration
 302 ****************************************************************/
 303static int kaweth_read_configuration(struct kaweth_device *kaweth)
 304{
 305	int retval;
 306
 307	dbg("Reading kaweth configuration");
 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
 329	dbg("Setting URB size to %d", (unsigned)urb_size);
 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
 351	dbg("Set SOFS wait to %d", (unsigned)sofs_wait);
 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
 374	dbg("Set receive filter to %d", (unsigned)receive_filter);
 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,
 393				    const char *fwname,
 394				    __u8 interrupt,
 395				    __u8 type)
 396{
 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);
 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	dbg("High: %i, Low:%i", kaweth->firmware_buf[3],
 423		   kaweth->firmware_buf[2]);
 424
 425	dbg("Downloading firmware at %p to kaweth device at %p",
 426	    fw->data, kaweth);
 427	dbg("Firmware length: %d", data_len);
 428
 429	return kaweth_control(kaweth,
 430		              usb_sndctrlpipe(kaweth->dev, 0),
 431			      KAWETH_COMMAND_SCAN,
 432			      USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 433			      0,
 434			      0,
 435			      (void *)kaweth->firmware_buf,
 436			      data_len,
 437			      KAWETH_CONTROL_TIMEOUT);
 438}
 439
 440/****************************************************************
 441 *     kaweth_trigger_firmware
 442 ****************************************************************/
 443static int kaweth_trigger_firmware(struct kaweth_device *kaweth,
 444				   __u8 interrupt)
 445{
 446	kaweth->firmware_buf[0] = 0xB6;
 447	kaweth->firmware_buf[1] = 0xC3;
 448	kaweth->firmware_buf[2] = 0x01;
 449	kaweth->firmware_buf[3] = 0x00;
 450	kaweth->firmware_buf[4] = 0x06;
 451	kaweth->firmware_buf[5] = interrupt;
 452	kaweth->firmware_buf[6] = 0x00;
 453	kaweth->firmware_buf[7] = 0x00;
 454
 455	dbg("Triggering firmware");
 456
 457	return kaweth_control(kaweth,
 458			      usb_sndctrlpipe(kaweth->dev, 0),
 459			      KAWETH_COMMAND_SCAN,
 460			      USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 461			      0,
 462			      0,
 463			      (void *)kaweth->firmware_buf,
 464			      8,
 465			      KAWETH_CONTROL_TIMEOUT);
 466}
 467
 468/****************************************************************
 469 *     kaweth_reset
 470 ****************************************************************/
 471static int kaweth_reset(struct kaweth_device *kaweth)
 472{
 473	int result;
 474
 475	dbg("kaweth_reset(%p)", kaweth);
 476	result = usb_reset_configuration(kaweth->dev);
 477	mdelay(10);
 478
 479	dbg("kaweth_reset() returns %d.",result);
 480
 481	return result;
 482}
 483
 484static void kaweth_usb_receive(struct urb *);
 485static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t);
 486
 487/****************************************************************
 488	int_callback
 489*****************************************************************/
 490
 491static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf)
 492{
 493	int status;
 494
 495	status = usb_submit_urb (kaweth->irq_urb, mf);
 496	if (unlikely(status == -ENOMEM)) {
 497		kaweth->suspend_lowmem_ctrl = 1;
 498		schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
 499	} else {
 500		kaweth->suspend_lowmem_ctrl = 0;
 501	}
 502
 503	if (status)
 504		err ("can't resubmit intr, %s-%s, status %d",
 505				kaweth->dev->bus->bus_name,
 506				kaweth->dev->devpath, status);
 507}
 508
 509static void int_callback(struct urb *u)
 510{
 511	struct kaweth_device *kaweth = u->context;
 512	int act_state;
 513	int status = u->status;
 514
 515	switch (status) {
 516	case 0:			/* success */
 517		break;
 518	case -ECONNRESET:	/* unlink */
 519	case -ENOENT:
 520	case -ESHUTDOWN:
 521		return;
 522	/* -EPIPE:  should clear the halt */
 523	default:		/* error */
 524		goto resubmit;
 525	}
 526
 527	/* we check the link state to report changes */
 528	if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) {
 529		if (act_state)
 530			netif_carrier_on(kaweth->net);
 531		else
 532			netif_carrier_off(kaweth->net);
 533
 534		kaweth->linkstate = act_state;
 535	}
 536resubmit:
 537	kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC);
 538}
 539
 540static void kaweth_resubmit_tl(struct work_struct *work)
 541{
 542	struct kaweth_device *kaweth =
 543		container_of(work, struct kaweth_device, lowmem_work.work);
 544
 545	if (IS_BLOCKED(kaweth->status))
 546		return;
 547
 548	if (kaweth->suspend_lowmem_rx)
 549		kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
 550
 551	if (kaweth->suspend_lowmem_ctrl)
 552		kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
 553}
 554
 555
 556/****************************************************************
 557 *     kaweth_resubmit_rx_urb
 558 ****************************************************************/
 559static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth,
 560						gfp_t mem_flags)
 561{
 562	int result;
 563
 564	usb_fill_bulk_urb(kaweth->rx_urb,
 565		      kaweth->dev,
 566		      usb_rcvbulkpipe(kaweth->dev, 1),
 567		      kaweth->rx_buf,
 568		      KAWETH_BUF_SIZE,
 569		      kaweth_usb_receive,
 570		      kaweth);
 571	kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 572	kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle;
 573
 574	if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) {
 575		if (result == -ENOMEM) {
 576			kaweth->suspend_lowmem_rx = 1;
 577			schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
 578		}
 579		err("resubmitting rx_urb %d failed", result);
 580	} else {
 581		kaweth->suspend_lowmem_rx = 0;
 582	}
 583
 584	return result;
 585}
 586
 587static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth);
 588
 589/****************************************************************
 590 *     kaweth_usb_receive
 591 ****************************************************************/
 592static void kaweth_usb_receive(struct urb *urb)
 593{
 594	struct kaweth_device *kaweth = urb->context;
 595	struct net_device *net = kaweth->net;
 596	int status = urb->status;
 597
 598	int count = urb->actual_length;
 599	int count2 = urb->transfer_buffer_length;
 600
 601	__u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf);
 602
 603	struct sk_buff *skb;
 604
 605	if (unlikely(status == -EPIPE)) {
 606		kaweth->stats.rx_errors++;
 607		kaweth->end = 1;
 608		wake_up(&kaweth->term_wait);
 609		dbg("Status was -EPIPE.");
 610		return;
 611	}
 612	if (unlikely(status == -ECONNRESET || status == -ESHUTDOWN)) {
 613		/* we are killed - set a flag and wake the disconnect handler */
 614		kaweth->end = 1;
 615		wake_up(&kaweth->term_wait);
 616		dbg("Status was -ECONNRESET or -ESHUTDOWN.");
 617		return;
 618	}
 619	if (unlikely(status == -EPROTO || status == -ETIME ||
 620		     status == -EILSEQ)) {
 621		kaweth->stats.rx_errors++;
 622		dbg("Status was -EPROTO, -ETIME, or -EILSEQ.");
 623		return;
 624	}
 625	if (unlikely(status == -EOVERFLOW)) {
 626		kaweth->stats.rx_errors++;
 627		dbg("Status was -EOVERFLOW.");
 628	}
 629	spin_lock(&kaweth->device_lock);
 630	if (IS_BLOCKED(kaweth->status)) {
 631		spin_unlock(&kaweth->device_lock);
 632		return;
 633	}
 634	spin_unlock(&kaweth->device_lock);
 635
 636	if(status && status != -EREMOTEIO && count != 1) {
 637		err("%s RX status: %d count: %d packet_len: %d",
 638                           net->name,
 639			   status,
 640			   count,
 641			   (int)pkt_len);
 642		kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 643                return;
 644	}
 645
 646	if(kaweth->net && (count > 2)) {
 647		if(pkt_len > (count - 2)) {
 648			err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count);
 649			err("Packet len & 2047: %x", pkt_len & 2047);
 650			err("Count 2: %x", count2);
 651		        kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 652                        return;
 653                }
 654
 655		if(!(skb = dev_alloc_skb(pkt_len+2))) {
 656		        kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 657                        return;
 658		}
 659
 660		skb_reserve(skb, 2);    /* Align IP on 16 byte boundaries */
 661
 662		skb_copy_to_linear_data(skb, kaweth->rx_buf + 2, pkt_len);
 663
 664		skb_put(skb, pkt_len);
 665
 666		skb->protocol = eth_type_trans(skb, net);
 667
 668		netif_rx(skb);
 669
 670		kaweth->stats.rx_packets++;
 671		kaweth->stats.rx_bytes += pkt_len;
 672	}
 673
 674	kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 675}
 676
 677/****************************************************************
 678 *     kaweth_open
 679 ****************************************************************/
 680static int kaweth_open(struct net_device *net)
 681{
 682	struct kaweth_device *kaweth = netdev_priv(net);
 683	int res;
 684
 685	dbg("Opening network device.");
 686
 687	res = usb_autopm_get_interface(kaweth->intf);
 688	if (res) {
 689		err("Interface cannot be resumed.");
 690		return -EIO;
 691	}
 692	res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL);
 693	if (res)
 694		goto err_out;
 695
 696	usb_fill_int_urb(
 697		kaweth->irq_urb,
 698		kaweth->dev,
 699		usb_rcvintpipe(kaweth->dev, 3),
 700		kaweth->intbuffer,
 701		INTBUFFERSIZE,
 702		int_callback,
 703		kaweth,
 704		250); /* overriding the descriptor */
 705	kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle;
 706	kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 707
 708	res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL);
 709	if (res) {
 710		usb_kill_urb(kaweth->rx_urb);
 711		goto err_out;
 712	}
 713	kaweth->opened = 1;
 714
 715	netif_start_queue(net);
 716
 717	kaweth_async_set_rx_mode(kaweth);
 718	return 0;
 719
 720err_out:
 721	usb_autopm_put_interface(kaweth->intf);
 722	return -EIO;
 723}
 724
 725/****************************************************************
 726 *     kaweth_kill_urbs
 727 ****************************************************************/
 728static void kaweth_kill_urbs(struct kaweth_device *kaweth)
 729{
 730	usb_kill_urb(kaweth->irq_urb);
 731	usb_kill_urb(kaweth->rx_urb);
 732	usb_kill_urb(kaweth->tx_urb);
 733
 734	cancel_delayed_work_sync(&kaweth->lowmem_work);
 735
 736	/* a scheduled work may have resubmitted,
 737	   we hit them again */
 738	usb_kill_urb(kaweth->irq_urb);
 739	usb_kill_urb(kaweth->rx_urb);
 740}
 741
 742/****************************************************************
 743 *     kaweth_close
 744 ****************************************************************/
 745static int kaweth_close(struct net_device *net)
 746{
 747	struct kaweth_device *kaweth = netdev_priv(net);
 748
 749	netif_stop_queue(net);
 750	kaweth->opened = 0;
 751
 752	kaweth->status |= KAWETH_STATUS_CLOSING;
 753
 754	kaweth_kill_urbs(kaweth);
 755
 756	kaweth->status &= ~KAWETH_STATUS_CLOSING;
 757
 758	usb_autopm_put_interface(kaweth->intf);
 759
 760	return 0;
 761}
 762
 763static u32 kaweth_get_link(struct net_device *dev)
 764{
 765	struct kaweth_device *kaweth = netdev_priv(dev);
 766
 767	return kaweth->linkstate;
 768}
 769
 770static const struct ethtool_ops ops = {
 771	.get_link	= kaweth_get_link
 772};
 773
 774/****************************************************************
 775 *     kaweth_usb_transmit_complete
 776 ****************************************************************/
 777static void kaweth_usb_transmit_complete(struct urb *urb)
 778{
 779	struct kaweth_device *kaweth = urb->context;
 780	struct sk_buff *skb = kaweth->tx_skb;
 781	int status = urb->status;
 782
 783	if (unlikely(status != 0))
 784		if (status != -ENOENT)
 785			dbg("%s: TX status %d.", kaweth->net->name, status);
 786
 787	netif_wake_queue(kaweth->net);
 788	dev_kfree_skb_irq(skb);
 789}
 790
 791/****************************************************************
 792 *     kaweth_start_xmit
 793 ****************************************************************/
 794static netdev_tx_t kaweth_start_xmit(struct sk_buff *skb,
 795					   struct net_device *net)
 796{
 797	struct kaweth_device *kaweth = netdev_priv(net);
 798	__le16 *private_header;
 799
 800	int res;
 801
 802	spin_lock_irq(&kaweth->device_lock);
 803
 804	kaweth_async_set_rx_mode(kaweth);
 805	netif_stop_queue(net);
 806	if (IS_BLOCKED(kaweth->status)) {
 807		goto skip;
 808	}
 809
 810	/* We now decide whether we can put our special header into the sk_buff */
 811	if (skb_cloned(skb) || skb_headroom(skb) < 2) {
 812		/* no such luck - we make our own */
 813		struct sk_buff *copied_skb;
 814		copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC);
 815		dev_kfree_skb_irq(skb);
 816		skb = copied_skb;
 817		if (!copied_skb) {
 818			kaweth->stats.tx_errors++;
 819			netif_start_queue(net);
 820			spin_unlock_irq(&kaweth->device_lock);
 821			return NETDEV_TX_OK;
 822		}
 823	}
 824
 825	private_header = (__le16 *)__skb_push(skb, 2);
 826	*private_header = cpu_to_le16(skb->len-2);
 827	kaweth->tx_skb = skb;
 828
 829	usb_fill_bulk_urb(kaweth->tx_urb,
 830		      kaweth->dev,
 831		      usb_sndbulkpipe(kaweth->dev, 2),
 832		      private_header,
 833		      skb->len,
 834		      kaweth_usb_transmit_complete,
 835		      kaweth);
 836	kaweth->end = 0;
 837
 838	if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
 839	{
 840		dev_warn(&net->dev, "kaweth failed tx_urb %d\n", res);
 841skip:
 842		kaweth->stats.tx_errors++;
 843
 844		netif_start_queue(net);
 845		dev_kfree_skb_irq(skb);
 846	}
 847	else
 848	{
 849		kaweth->stats.tx_packets++;
 850		kaweth->stats.tx_bytes += skb->len;
 851	}
 852
 853	spin_unlock_irq(&kaweth->device_lock);
 854
 855	return NETDEV_TX_OK;
 856}
 857
 858/****************************************************************
 859 *     kaweth_set_rx_mode
 860 ****************************************************************/
 861static void kaweth_set_rx_mode(struct net_device *net)
 862{
 863	struct kaweth_device *kaweth = netdev_priv(net);
 864
 865	__u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
 866                                     KAWETH_PACKET_FILTER_BROADCAST |
 867		                     KAWETH_PACKET_FILTER_MULTICAST;
 868
 869	dbg("Setting Rx mode to %d", packet_filter_bitmap);
 870
 871	netif_stop_queue(net);
 872
 873	if (net->flags & IFF_PROMISC) {
 874		packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
 875	}
 876	else if (!netdev_mc_empty(net) || (net->flags & IFF_ALLMULTI)) {
 877		packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
 878	}
 879
 880	kaweth->packet_filter_bitmap = packet_filter_bitmap;
 881	netif_wake_queue(net);
 882}
 883
 884/****************************************************************
 885 *     kaweth_async_set_rx_mode
 886 ****************************************************************/
 887static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
 888{
 889	int result;
 890	__u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
 891
 892	kaweth->packet_filter_bitmap = 0;
 893	if (packet_filter_bitmap == 0)
 894		return;
 895
 896	if (in_interrupt())
 897		return;
 898
 899	result = kaweth_control(kaweth,
 900				usb_sndctrlpipe(kaweth->dev, 0),
 901				KAWETH_COMMAND_SET_PACKET_FILTER,
 902				USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 903				packet_filter_bitmap,
 904				0,
 905				(void *)&kaweth->scratch,
 906				0,
 907				KAWETH_CONTROL_TIMEOUT);
 908
 909	if(result < 0) {
 910		err("Failed to set Rx mode: %d", result);
 911	}
 912	else {
 913		dbg("Set Rx mode to %d", packet_filter_bitmap);
 914	}
 915}
 916
 917/****************************************************************
 918 *     kaweth_netdev_stats
 919 ****************************************************************/
 920static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev)
 921{
 922	struct kaweth_device *kaweth = netdev_priv(dev);
 923	return &kaweth->stats;
 924}
 925
 926/****************************************************************
 927 *     kaweth_tx_timeout
 928 ****************************************************************/
 929static void kaweth_tx_timeout(struct net_device *net)
 930{
 931	struct kaweth_device *kaweth = netdev_priv(net);
 932
 933	dev_warn(&net->dev, "%s: Tx timed out. Resetting.\n", net->name);
 934	kaweth->stats.tx_errors++;
 935	net->trans_start = jiffies;
 936
 937	usb_unlink_urb(kaweth->tx_urb);
 938}
 939
 940/****************************************************************
 941 *     kaweth_suspend
 942 ****************************************************************/
 943static int kaweth_suspend(struct usb_interface *intf, pm_message_t message)
 944{
 945	struct kaweth_device *kaweth = usb_get_intfdata(intf);
 946	unsigned long flags;
 947
 948	dbg("Suspending device");
 949	spin_lock_irqsave(&kaweth->device_lock, flags);
 950	kaweth->status |= KAWETH_STATUS_SUSPENDING;
 951	spin_unlock_irqrestore(&kaweth->device_lock, flags);
 952
 953	kaweth_kill_urbs(kaweth);
 954	return 0;
 955}
 956
 957/****************************************************************
 958 *     kaweth_resume
 959 ****************************************************************/
 960static int kaweth_resume(struct usb_interface *intf)
 961{
 962	struct kaweth_device *kaweth = usb_get_intfdata(intf);
 963	unsigned long flags;
 964
 965	dbg("Resuming device");
 966	spin_lock_irqsave(&kaweth->device_lock, flags);
 967	kaweth->status &= ~KAWETH_STATUS_SUSPENDING;
 968	spin_unlock_irqrestore(&kaweth->device_lock, flags);
 969
 970	if (!kaweth->opened)
 971		return 0;
 972	kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
 973	kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
 974
 975	return 0;
 976}
 977
 978/****************************************************************
 979 *     kaweth_probe
 980 ****************************************************************/
 981
 982
 983static const struct net_device_ops kaweth_netdev_ops = {
 984	.ndo_open =			kaweth_open,
 985	.ndo_stop =			kaweth_close,
 986	.ndo_start_xmit =		kaweth_start_xmit,
 987	.ndo_tx_timeout =		kaweth_tx_timeout,
 988	.ndo_set_multicast_list =	kaweth_set_rx_mode,
 989	.ndo_get_stats =		kaweth_netdev_stats,
 990	.ndo_change_mtu =		eth_change_mtu,
 991	.ndo_set_mac_address =		eth_mac_addr,
 992	.ndo_validate_addr =		eth_validate_addr,
 993};
 994
 995static int kaweth_probe(
 996		struct usb_interface *intf,
 997		const struct usb_device_id *id      /* from id_table */
 998	)
 999{
1000	struct usb_device *dev = interface_to_usbdev(intf);
1001	struct kaweth_device *kaweth;
1002	struct net_device *netdev;
1003	const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
1004	int result = 0;
1005
1006	dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x",
1007		 dev->devnum,
1008		 le16_to_cpu(dev->descriptor.idVendor),
1009		 le16_to_cpu(dev->descriptor.idProduct),
1010		 le16_to_cpu(dev->descriptor.bcdDevice));
1011
1012	dbg("Device at %p", dev);
1013
1014	dbg("Descriptor length: %x type: %x",
1015		 (int)dev->descriptor.bLength,
1016		 (int)dev->descriptor.bDescriptorType);
1017
1018	netdev = alloc_etherdev(sizeof(*kaweth));
1019	if (!netdev)
1020		return -ENOMEM;
1021
1022	kaweth = netdev_priv(netdev);
1023	kaweth->dev = dev;
1024	kaweth->net = netdev;
1025
1026	spin_lock_init(&kaweth->device_lock);
1027	init_waitqueue_head(&kaweth->term_wait);
1028
1029	dbg("Resetting.");
1030
1031	kaweth_reset(kaweth);
1032
1033	/*
1034	 * If high byte of bcdDevice is nonzero, firmware is already
1035	 * downloaded. Don't try to do it again, or we'll hang the device.
1036	 */
1037
1038	if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) {
1039		dev_info(&intf->dev, "Firmware present in device.\n");
1040	} else {
1041		/* Download the firmware */
1042		dev_info(&intf->dev, "Downloading firmware...\n");
1043		kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
1044		if ((result = kaweth_download_firmware(kaweth,
1045						      "kaweth/new_code.bin",
1046						      100,
1047						      2)) < 0) {
1048			err("Error downloading firmware (%d)", result);
1049			goto err_fw;
1050		}
1051
1052		if ((result = kaweth_download_firmware(kaweth,
1053						      "kaweth/new_code_fix.bin",
1054						      100,
1055						      3)) < 0) {
1056			err("Error downloading firmware fix (%d)", result);
1057			goto err_fw;
1058		}
1059
1060		if ((result = kaweth_download_firmware(kaweth,
1061						      "kaweth/trigger_code.bin",
1062						      126,
1063						      2)) < 0) {
1064			err("Error downloading trigger code (%d)", result);
1065			goto err_fw;
1066
1067		}
1068
1069		if ((result = kaweth_download_firmware(kaweth,
1070						      "kaweth/trigger_code_fix.bin",
1071						      126,
1072						      3)) < 0) {
1073			err("Error downloading trigger code fix (%d)", result);
1074			goto err_fw;
1075		}
1076
1077
1078		if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
1079			err("Error triggering firmware (%d)", result);
1080			goto err_fw;
1081		}
1082
1083		/* Device will now disappear for a moment...  */
1084		dev_info(&intf->dev, "Firmware loaded.  I'll be back...\n");
1085err_fw:
1086		free_page((unsigned long)kaweth->firmware_buf);
1087		free_netdev(netdev);
1088		return -EIO;
1089	}
1090
1091	result = kaweth_read_configuration(kaweth);
1092
1093	if(result < 0) {
1094		err("Error reading configuration (%d), no net device created", result);
1095		goto err_free_netdev;
1096	}
1097
1098	dev_info(&intf->dev, "Statistics collection: %x\n", kaweth->configuration.statistics_mask);
1099	dev_info(&intf->dev, "Multicast filter limit: %x\n", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
1100	dev_info(&intf->dev, "MTU: %d\n", le16_to_cpu(kaweth->configuration.segment_size));
1101	dev_info(&intf->dev, "Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x\n",
1102		 (int)kaweth->configuration.hw_addr[0],
1103		 (int)kaweth->configuration.hw_addr[1],
1104		 (int)kaweth->configuration.hw_addr[2],
1105		 (int)kaweth->configuration.hw_addr[3],
1106		 (int)kaweth->configuration.hw_addr[4],
1107		 (int)kaweth->configuration.hw_addr[5]);
1108
1109	if(!memcmp(&kaweth->configuration.hw_addr,
1110                   &bcast_addr,
1111		   sizeof(bcast_addr))) {
1112		err("Firmware not functioning properly, no net device created");
1113		goto err_free_netdev;
1114	}
1115
1116	if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
1117		dbg("Error setting URB size");
1118		goto err_free_netdev;
1119	}
1120
1121	if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
1122		err("Error setting SOFS wait");
1123		goto err_free_netdev;
1124	}
1125
1126	result = kaweth_set_receive_filter(kaweth,
1127                                           KAWETH_PACKET_FILTER_DIRECTED |
1128                                           KAWETH_PACKET_FILTER_BROADCAST |
1129                                           KAWETH_PACKET_FILTER_MULTICAST);
1130
1131	if(result < 0) {
1132		err("Error setting receive filter");
1133		goto err_free_netdev;
1134	}
1135
1136	dbg("Initializing net device.");
1137
1138	kaweth->intf = intf;
1139
1140	kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1141	if (!kaweth->tx_urb)
1142		goto err_free_netdev;
1143	kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1144	if (!kaweth->rx_urb)
1145		goto err_only_tx;
1146	kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1147	if (!kaweth->irq_urb)
1148		goto err_tx_and_rx;
1149
1150	kaweth->intbuffer = usb_alloc_coherent(	kaweth->dev,
1151						INTBUFFERSIZE,
1152						GFP_KERNEL,
1153						&kaweth->intbufferhandle);
1154	if (!kaweth->intbuffer)
1155		goto err_tx_and_rx_and_irq;
1156	kaweth->rx_buf = usb_alloc_coherent(	kaweth->dev,
1157						KAWETH_BUF_SIZE,
1158						GFP_KERNEL,
1159						&kaweth->rxbufferhandle);
1160	if (!kaweth->rx_buf)
1161		goto err_all_but_rxbuf;
1162
1163	memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr));
1164	memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr,
1165               sizeof(kaweth->configuration.hw_addr));
1166
1167	netdev->netdev_ops = &kaweth_netdev_ops;
1168	netdev->watchdog_timeo = KAWETH_TX_TIMEOUT;
1169	netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size);
1170	SET_ETHTOOL_OPS(netdev, &ops);
1171
1172	/* kaweth is zeroed as part of alloc_netdev */
1173	INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl);
1174	usb_set_intfdata(intf, kaweth);
1175
1176#if 0
1177// dma_supported() is deeply broken on almost all architectures
1178	if (dma_supported (&intf->dev, 0xffffffffffffffffULL))
1179		kaweth->net->features |= NETIF_F_HIGHDMA;
1180#endif
1181
1182	SET_NETDEV_DEV(netdev, &intf->dev);
1183	if (register_netdev(netdev) != 0) {
1184		err("Error registering netdev.");
1185		goto err_intfdata;
1186	}
1187
1188	dev_info(&intf->dev, "kaweth interface created at %s\n",
1189		 kaweth->net->name);
1190
1191	dbg("Kaweth probe returning.");
1192
1193	return 0;
1194
1195err_intfdata:
1196	usb_set_intfdata(intf, NULL);
1197	usb_free_coherent(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1198err_all_but_rxbuf:
1199	usb_free_coherent(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1200err_tx_and_rx_and_irq:
1201	usb_free_urb(kaweth->irq_urb);
1202err_tx_and_rx:
1203	usb_free_urb(kaweth->rx_urb);
1204err_only_tx:
1205	usb_free_urb(kaweth->tx_urb);
1206err_free_netdev:
1207	free_netdev(netdev);
1208
1209	return -EIO;
1210}
1211
1212/****************************************************************
1213 *     kaweth_disconnect
1214 ****************************************************************/
1215static void kaweth_disconnect(struct usb_interface *intf)
1216{
1217	struct kaweth_device *kaweth = usb_get_intfdata(intf);
1218	struct net_device *netdev;
1219
1220	dev_info(&intf->dev, "Unregistering\n");
1221
1222	usb_set_intfdata(intf, NULL);
1223	if (!kaweth) {
1224		dev_warn(&intf->dev, "unregistering non-existent device\n");
1225		return;
1226	}
1227	netdev = kaweth->net;
1228
1229	dbg("Unregistering net device");
1230	unregister_netdev(netdev);
1231
1232	usb_free_urb(kaweth->rx_urb);
1233	usb_free_urb(kaweth->tx_urb);
1234	usb_free_urb(kaweth->irq_urb);
1235
1236	usb_free_coherent(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1237	usb_free_coherent(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1238
1239	free_netdev(netdev);
1240}
1241
1242
1243// FIXME this completion stuff is a modified clone of
1244// an OLD version of some stuff in usb.c ...
1245struct usb_api_data {
1246	wait_queue_head_t wqh;
1247	int done;
1248};
1249
1250/*-------------------------------------------------------------------*
1251 * completion handler for compatibility wrappers (sync control/bulk) *
1252 *-------------------------------------------------------------------*/
1253static void usb_api_blocking_completion(struct urb *urb)
1254{
1255        struct usb_api_data *awd = (struct usb_api_data *)urb->context;
1256
1257	awd->done=1;
1258	wake_up(&awd->wqh);
1259}
1260
1261/*-------------------------------------------------------------------*
1262 *                         COMPATIBILITY STUFF                       *
1263 *-------------------------------------------------------------------*/
1264
1265// Starts urb and waits for completion or timeout
1266static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
1267{
1268	struct usb_api_data awd;
1269        int status;
1270
1271        init_waitqueue_head(&awd.wqh);
1272        awd.done = 0;
1273
1274        urb->context = &awd;
1275        status = usb_submit_urb(urb, GFP_NOIO);
1276        if (status) {
1277                // something went wrong
1278                usb_free_urb(urb);
1279                return status;
1280        }
1281
1282	if (!wait_event_timeout(awd.wqh, awd.done, timeout)) {
1283                // timeout
1284                dev_warn(&urb->dev->dev, "usb_control/bulk_msg: timeout\n");
1285                usb_kill_urb(urb);  // remove urb safely
1286                status = -ETIMEDOUT;
1287        }
1288	else {
1289                status = urb->status;
1290	}
1291
1292        if (actual_length) {
1293                *actual_length = urb->actual_length;
1294	}
1295
1296        usb_free_urb(urb);
1297        return status;
1298}
1299
1300/*-------------------------------------------------------------------*/
1301// returns status (negative) or length (positive)
1302static int kaweth_internal_control_msg(struct usb_device *usb_dev,
1303				       unsigned int pipe,
1304				       struct usb_ctrlrequest *cmd, void *data,
1305				       int len, int timeout)
1306{
1307        struct urb *urb;
1308        int retv;
1309        int length = 0; /* shut up GCC */
1310
1311	urb = usb_alloc_urb(0, GFP_ATOMIC);
1312        if (!urb)
1313                return -ENOMEM;
1314
1315        usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data,
1316			 len, usb_api_blocking_completion, NULL);
1317
1318        retv = usb_start_wait_urb(urb, timeout, &length);
1319        if (retv < 0) {
1320                return retv;
1321	}
1322        else {
1323                return length;
1324	}
1325}
1326
1327
1328/****************************************************************
1329 *     kaweth_init
1330 ****************************************************************/
1331static int __init kaweth_init(void)
1332{
1333	dbg("Driver loading");
1334	return usb_register(&kaweth_driver);
1335}
1336
1337/****************************************************************
1338 *     kaweth_exit
1339 ****************************************************************/
1340static void __exit kaweth_exit(void)
1341{
1342	usb_deregister(&kaweth_driver);
1343}
1344
1345module_init(kaweth_init);
1346module_exit(kaweth_exit);
1347
1348
1349
1350
1351
1352
1353
1354
1355