drivers/usb/net/kaweth.c

   1 /****************************************************************
   2  *
   3  *     kaweth.c - driver for KL5KUSB101 based USB->Ethernet
   4  *
   5  *     (c) 2000 Interlan Communications
   6  *     (c) 2000 Stephane Alnet
   7  *     (C) 2001 Brad Hards
   8  *     (C) 2002 Oliver Neukum
   9  *
  10  *     Original author: The Zapman <zapman@interlan.net>
  11  *     Inspired by, and much credit goes to Michael Rothwell
  12  *     <rothwell@interlan.net> for the test equipment, help, and patience
  13  *     Based off of (and with thanks to) Petko Manolov's pegaus.c driver.
  14  *     Also many thanks to Joel Silverman and Ed Surprenant at Kawasaki
  15  *     for providing the firmware and driver resources.
  16  *
  17  *     This program is free software; you can redistribute it and/or
  18  *     modify it under the terms of the GNU General Public License as
  19  *     published by the Free Software Foundation; either version 2, or
  20  *     (at your option) any later version.
  21  *
  22  *     This program is distributed in the hope that it will be useful,
  23  *     but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25  *     GNU General Public License for more details.
  26  *
  27  *     You should have received a copy of the GNU General Public License
  28  *     along with this program; if not, write to the Free Software Foundation,
  29  *     Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  30  *
  31  ****************************************************************/
  32
  33 /* TODO:
  34  * 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
  68 #ifdef DEBUG
  69 #define kaweth_dbg(format, arg...) printk(KERN_DEBUG __FILE__ ": " format "\n" ,##arg)
  70 #else
  71 #define kaweth_dbg(format, arg...) do {} while (0)
  72 #endif
  73 #define kaweth_err(format, arg...) printk(KERN_ERR __FILE__ ": " format "\n" ,##arg)
  74 #define kaweth_info(format, arg...) printk(KERN_INFO __FILE__ ": " format "\n" , ##arg)
  75 #define kaweth_warn(format, arg...) printk(KERN_WARNING __FILE__ ": " format "\n" , ##arg)
  76
  77
  78 #include "kawethfw.h"
  79
  80 #define KAWETH_MTU                      1514
  81 #define KAWETH_BUF_SIZE                 1664
  82 #define KAWETH_TX_TIMEOUT               (5 * HZ)
  83 #define KAWETH_SCRATCH_SIZE             32
  84 #define KAWETH_FIRMWARE_BUF_SIZE        4096
  85 #define KAWETH_CONTROL_TIMEOUT          (30 * HZ)
  86
  87 #define KAWETH_STATUS_BROKEN            0x0000001
  88 #define KAWETH_STATUS_CLOSING           0x0000002
  89
  90 #define KAWETH_PACKET_FILTER_PROMISCUOUS        0x01
  91 #define KAWETH_PACKET_FILTER_ALL_MULTICAST      0x02
  92 #define KAWETH_PACKET_FILTER_DIRECTED           0x04
  93 #define KAWETH_PACKET_FILTER_BROADCAST          0x08
  94 #define KAWETH_PACKET_FILTER_MULTICAST          0x10
  95
  96 /* Table 7 */
  97 #define KAWETH_COMMAND_GET_ETHERNET_DESC        0x00
  98 #define KAWETH_COMMAND_MULTICAST_FILTERS        0x01
  99 #define KAWETH_COMMAND_SET_PACKET_FILTER        0x02
 100 #define KAWETH_COMMAND_STATISTICS               0x03
 101 #define KAWETH_COMMAND_SET_TEMP_MAC             0x06
 102 #define KAWETH_COMMAND_GET_TEMP_MAC             0x07
 103 #define KAWETH_COMMAND_SET_URB_SIZE             0x08
 104 #define KAWETH_COMMAND_SET_SOFS_WAIT            0x09
 105 #define KAWETH_COMMAND_SCAN                     0xFF
 106
 107 #define KAWETH_SOFS_TO_WAIT                     0x05
 108
 109 #define INTBUFFERSIZE                           4
 110
 111 #define STATE_OFFSET                            0
 112 #define STATE_MASK                              0x40
 113 #define STATE_SHIFT                             5
 114
 115
 116 MODULE_AUTHOR("Michael Zappe <zapman@interlan.net>, Stephane Alnet <stephane@u-picardie.fr>, Brad Hards <bhards@bigpond.net.au> and Oliver Neukum <oliver@neukum.org>");
 117 MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver");
 118 MODULE_LICENSE("GPL");
 119
 120 static const char driver_name[] = "kaweth";
 121
 122 static int kaweth_probe(
 123                 struct usb_interface *intf,
 124                 const struct usb_device_id *id  /* from id_table */
 125         );
 126 static void kaweth_disconnect(struct usb_interface *intf);
 127 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
 128                                        unsigned int pipe,
 129                                        struct usb_ctrlrequest *cmd, void *data,
 130                                        int len, int timeout);
 131
 132 /****************************************************************
 133  *     usb_device_id
 134  ****************************************************************/
 135 static struct usb_device_id usb_klsi_table[] = {
 136         { USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */
 137         { USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */
 138         { USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */
 139         { USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */
 140         { USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */
 141         { USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */
 142         { USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */
 143         { USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */
 144         { USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */
 145         { USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */
 146         { USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */
 147         { USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */
 148         { USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */
 149         { USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */
 150         { USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */
 151         { USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */
 152         { USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */
 153         { USB_DEVICE(0x0846, 0x1001) }, /* NetGear EA-101 */
 154         { USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */
 155         { USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */
 156         { USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */
 157         { USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */
 158         { USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */
 159         { USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */
 160         { USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */
 161         { USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */
 162         { USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */
 163         { USB_DEVICE(0x1485, 0x0001) }, /* Silicom U2E */
 164         { USB_DEVICE(0x1485, 0x0002) }, /* Psion Dacom Gold Port Ethernet */
 165         { USB_DEVICE(0x1645, 0x0005) }, /* Entrega E45 */
 166         { USB_DEVICE(0x1645, 0x0008) }, /* Entrega USB Ethernet Adapter */
 167         { USB_DEVICE(0x1645, 0x8005) }, /* PortGear Ethernet Adapter */
 168         { USB_DEVICE(0x2001, 0x4000) }, /* D-link DSB-650C */
 169         {} /* Null terminator */
 170 };
 171
 172 MODULE_DEVICE_TABLE (usb, usb_klsi_table);
 173
 174 /****************************************************************
 175  *     kaweth_driver
 176  ****************************************************************/
 177 static struct usb_driver kaweth_driver = {
 178         .name =         driver_name,
 179         .probe =        kaweth_probe,
 180         .disconnect =   kaweth_disconnect,
 181         .id_table =     usb_klsi_table,
 182 };
 183
 184 typedef __u8 eth_addr_t[6];
 185
 186 /****************************************************************
 187  *     usb_eth_dev
 188  ****************************************************************/
 189 struct 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  ****************************************************************/
 200 struct 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  ****************************************************************/
 215 struct 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         struct work_struct lowmem_work;
 225
 226         struct usb_device *dev;
 227         struct net_device *net;
 228         wait_queue_head_t term_wait;
 229
 230         struct urb *rx_urb;
 231         struct urb *tx_urb;
 232         struct urb *irq_urb;
 233
 234         dma_addr_t intbufferhandle;
 235         __u8 *intbuffer;
 236         dma_addr_t rxbufferhandle;
 237         __u8 *rx_buf;
 238
 239
 240         struct sk_buff *tx_skb;
 241
 242         __u8 *firmware_buf;
 243         __u8 scratch[KAWETH_SCRATCH_SIZE];
 244         __u16 packet_filter_bitmap;
 245
 246         struct kaweth_ethernet_configuration configuration;
 247
 248         struct net_device_stats stats;
 249 };
 250
 251
 252 /****************************************************************
 253  *     kaweth_control
 254  ****************************************************************/
 255 static int kaweth_control(struct kaweth_device *kaweth,
 256                           unsigned int pipe,
 257                           __u8 request,
 258                           __u8 requesttype,
 259                           __u16 value,
 260                           __u16 index,
 261                           void *data,
 262                           __u16 size,
 263                           int timeout)
 264 {
 265         struct usb_ctrlrequest *dr;
 266
 267         kaweth_dbg("kaweth_control()");
 268
 269         if(in_interrupt()) {
 270                 kaweth_dbg("in_interrupt()");
 271                 return -EBUSY;
 272         }
 273
 274         dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
 275
 276         if (!dr) {
 277                 kaweth_dbg("kmalloc() failed");
 278                 return -ENOMEM;
 279         }
 280
 281         dr->bRequestType= requesttype;
 282         dr->bRequest = request;
 283         dr->wValue = cpu_to_le16p(&value);
 284         dr->wIndex = cpu_to_le16p(&index);
 285         dr->wLength = cpu_to_le16p(&size);
 286
 287         return kaweth_internal_control_msg(kaweth->dev,
 288                                         pipe,
 289                                         dr,
 290                                         data,
 291                                         size,
 292                                         timeout);
 293 }
 294
 295 /****************************************************************
 296  *     kaweth_read_configuration
 297  ****************************************************************/
 298 static int kaweth_read_configuration(struct kaweth_device *kaweth)
 299 {
 300         int retval;
 301
 302         kaweth_dbg("Reading kaweth configuration");
 303
 304         retval = kaweth_control(kaweth,
 305                                 usb_rcvctrlpipe(kaweth->dev, 0),
 306                                 KAWETH_COMMAND_GET_ETHERNET_DESC,
 307                                 USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE,
 308                                 0,
 309                                 0,
 310                                 (void *)&kaweth->configuration,
 311                                 sizeof(kaweth->configuration),
 312                                 KAWETH_CONTROL_TIMEOUT);
 313
 314         return retval;
 315 }
 316
 317 /****************************************************************
 318  *     kaweth_set_urb_size
 319  ****************************************************************/
 320 static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size)
 321 {
 322         int retval;
 323
 324         kaweth_dbg("Setting URB size to %d", (unsigned)urb_size);
 325
 326         retval = kaweth_control(kaweth,
 327                                 usb_sndctrlpipe(kaweth->dev, 0),
 328                                 KAWETH_COMMAND_SET_URB_SIZE,
 329                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 330                                 urb_size,
 331                                 0,
 332                                 (void *)&kaweth->scratch,
 333                                 0,
 334                                 KAWETH_CONTROL_TIMEOUT);
 335
 336         return retval;
 337 }
 338
 339 /****************************************************************
 340  *     kaweth_set_sofs_wait
 341  ****************************************************************/
 342 static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait)
 343 {
 344         int retval;
 345
 346         kaweth_dbg("Set SOFS wait to %d", (unsigned)sofs_wait);
 347
 348         retval = kaweth_control(kaweth,
 349                                 usb_sndctrlpipe(kaweth->dev, 0),
 350                                 KAWETH_COMMAND_SET_SOFS_WAIT,
 351                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 352                                 sofs_wait,
 353                                 0,
 354                                 (void *)&kaweth->scratch,
 355                                 0,
 356                                 KAWETH_CONTROL_TIMEOUT);
 357
 358         return retval;
 359 }
 360
 361 /****************************************************************
 362  *     kaweth_set_receive_filter
 363  ****************************************************************/
 364 static int kaweth_set_receive_filter(struct kaweth_device *kaweth,
 365                                      __u16 receive_filter)
 366 {
 367         int retval;
 368
 369         kaweth_dbg("Set receive filter to %d", (unsigned)receive_filter);
 370
 371         retval = kaweth_control(kaweth,
 372                                 usb_sndctrlpipe(kaweth->dev, 0),
 373                                 KAWETH_COMMAND_SET_PACKET_FILTER,
 374                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 375                                 receive_filter,
 376                                 0,
 377                                 (void *)&kaweth->scratch,
 378                                 0,
 379                                 KAWETH_CONTROL_TIMEOUT);
 380
 381         return retval;
 382 }
 383
 384 /****************************************************************
 385  *     kaweth_download_firmware
 386  ****************************************************************/
 387 static int kaweth_download_firmware(struct kaweth_device *kaweth,
 388                                     __u8 *data,
 389                                     __u16 data_len,
 390                                     __u8 interrupt,
 391                                     __u8 type)
 392 {
 393         if(data_len > KAWETH_FIRMWARE_BUF_SIZE) {
 394                 kaweth_err("Firmware too big: %d", data_len);
 395                 return -ENOSPC;
 396         }
 397
 398         memcpy(kaweth->firmware_buf, data, data_len);
 399
 400         kaweth->firmware_buf[2] = (data_len & 0xFF) - 7;
 401         kaweth->firmware_buf[3] = data_len >> 8;
 402         kaweth->firmware_buf[4] = type;
 403         kaweth->firmware_buf[5] = interrupt;
 404
 405         kaweth_dbg("High: %i, Low:%i", kaweth->firmware_buf[3],
 406                    kaweth->firmware_buf[2]);
 407
 408         kaweth_dbg("Downloading firmware at %p to kaweth device at %p",
 409             data,
 410             kaweth);
 411         kaweth_dbg("Firmware length: %d", data_len);
 412
 413         return kaweth_control(kaweth,
 414                               usb_sndctrlpipe(kaweth->dev, 0),
 415                               KAWETH_COMMAND_SCAN,
 416                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 417                               0,
 418                               0,
 419                               (void *)kaweth->firmware_buf,
 420                               data_len,
 421                               KAWETH_CONTROL_TIMEOUT);
 422 }
 423
 424 /****************************************************************
 425  *     kaweth_trigger_firmware
 426  ****************************************************************/
 427 static int kaweth_trigger_firmware(struct kaweth_device *kaweth,
 428                                    __u8 interrupt)
 429 {
 430         kaweth->firmware_buf[0] = 0xB6;
 431         kaweth->firmware_buf[1] = 0xC3;
 432         kaweth->firmware_buf[2] = 0x01;
 433         kaweth->firmware_buf[3] = 0x00;
 434         kaweth->firmware_buf[4] = 0x06;
 435         kaweth->firmware_buf[5] = interrupt;
 436         kaweth->firmware_buf[6] = 0x00;
 437         kaweth->firmware_buf[7] = 0x00;
 438
 439         kaweth_dbg("Triggering firmware");
 440
 441         return kaweth_control(kaweth,
 442                               usb_sndctrlpipe(kaweth->dev, 0),
 443                               KAWETH_COMMAND_SCAN,
 444                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 445                               0,
 446                               0,
 447                               (void *)kaweth->firmware_buf,
 448                               8,
 449                               KAWETH_CONTROL_TIMEOUT);
 450 }
 451
 452 /****************************************************************
 453  *     kaweth_reset
 454  ****************************************************************/
 455 static int kaweth_reset(struct kaweth_device *kaweth)
 456 {
 457         int result;
 458
 459         kaweth_dbg("kaweth_reset(%p)", kaweth);
 460         result = kaweth_control(kaweth,
 461                                 usb_sndctrlpipe(kaweth->dev, 0),
 462                                 USB_REQ_SET_CONFIGURATION,
 463                                 0,
 464                                 kaweth->dev->config[0].desc.bConfigurationValue,
 465                                 0,
 466                                 NULL,
 467                                 0,
 468                                 KAWETH_CONTROL_TIMEOUT);
 469
 470         mdelay(10);
 471
 472         kaweth_dbg("kaweth_reset() returns %d.",result);
 473
 474         return result;
 475 }
 476
 477 static void kaweth_usb_receive(struct urb *, struct pt_regs *regs);
 478 static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t);
 479
 480 /****************************************************************
 481         int_callback
 482 *****************************************************************/
 483
 484 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf)
 485 {
 486         int status;
 487
 488         status = usb_submit_urb (kaweth->irq_urb, mf);
 489         if (unlikely(status == -ENOMEM)) {
 490                 kaweth->suspend_lowmem_ctrl = 1;
 491                 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
 492         } else {
 493                 kaweth->suspend_lowmem_ctrl = 0;
 494         }
 495
 496         if (status)
 497                 err ("can't resubmit intr, %s-%s, status %d",
 498                                 kaweth->dev->bus->bus_name,
 499                                 kaweth->dev->devpath, status);
 500 }
 501
 502 static void int_callback(struct urb *u, struct pt_regs *regs)
 503 {
 504         struct kaweth_device *kaweth = u->context;
 505         int act_state;
 506
 507         switch (u->status) {
 508         case 0:                 /* success */
 509                 break;
 510         case -ECONNRESET:       /* unlink */
 511         case -ENOENT:
 512         case -ESHUTDOWN:
 513                 return;
 514         /* -EPIPE:  should clear the halt */
 515         default:                /* error */
 516                 goto resubmit;
 517         }
 518
 519         /* we check the link state to report changes */
 520         if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) {
 521                 if (act_state)
 522                         netif_carrier_on(kaweth->net);
 523                 else
 524                         netif_carrier_off(kaweth->net);
 525
 526                 kaweth->linkstate = act_state;
 527         }
 528 resubmit:
 529         kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC);
 530 }
 531
 532 static void kaweth_resubmit_tl(void *d)
 533 {
 534         struct kaweth_device *kaweth = (struct kaweth_device *)d;
 535
 536         if (kaweth->status | KAWETH_STATUS_CLOSING)
 537                 return;
 538
 539         if (kaweth->suspend_lowmem_rx)
 540                 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
 541
 542         if (kaweth->suspend_lowmem_ctrl)
 543                 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
 544 }
 545
 546
 547 /****************************************************************
 548  *     kaweth_resubmit_rx_urb
 549  ****************************************************************/
 550 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth,
 551                                                 gfp_t mem_flags)
 552 {
 553         int result;
 554
 555         usb_fill_bulk_urb(kaweth->rx_urb,
 556                       kaweth->dev,
 557                       usb_rcvbulkpipe(kaweth->dev, 1),
 558                       kaweth->rx_buf,
 559                       KAWETH_BUF_SIZE,
 560                       kaweth_usb_receive,
 561                       kaweth);
 562         kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 563         kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle;
 564
 565         if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) {
 566                 if (result == -ENOMEM) {
 567                         kaweth->suspend_lowmem_rx = 1;
 568                         schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
 569                 }
 570                 kaweth_err("resubmitting rx_urb %d failed", result);
 571         } else {
 572                 kaweth->suspend_lowmem_rx = 0;
 573         }
 574
 575         return result;
 576 }
 577
 578 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth);
 579
 580 /****************************************************************
 581  *     kaweth_usb_receive
 582  ****************************************************************/
 583 static void kaweth_usb_receive(struct urb *urb, struct pt_regs *regs)
 584 {
 585         struct kaweth_device *kaweth = urb->context;
 586         struct net_device *net = kaweth->net;
 587
 588         int count = urb->actual_length;
 589         int count2 = urb->transfer_buffer_length;
 590
 591         __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf);
 592
 593         struct sk_buff *skb;
 594
 595         if(unlikely(urb->status == -ECONNRESET || urb->status == -ESHUTDOWN))
 596         /* we are killed - set a flag and wake the disconnect handler */
 597         {
 598                 kaweth->end = 1;
 599                 wake_up(&kaweth->term_wait);
 600                 return;
 601         }
 602
 603         if (kaweth->status & KAWETH_STATUS_CLOSING)
 604                 return;
 605
 606         if(urb->status && urb->status != -EREMOTEIO && count != 1) {
 607                 kaweth_err("%s RX status: %d count: %d packet_len: %d",
 608                            net->name,
 609                            urb->status,
 610                            count,
 611                            (int)pkt_len);
 612                 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 613                 return;
 614         }
 615
 616         if(kaweth->net && (count > 2)) {
 617                 if(pkt_len > (count - 2)) {
 618                         kaweth_err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count);
 619                         kaweth_err("Packet len & 2047: %x", pkt_len & 2047);
 620                         kaweth_err("Count 2: %x", count2);
 621                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 622                         return;
 623                 }
 624
 625                 if(!(skb = dev_alloc_skb(pkt_len+2))) {
 626                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 627                         return;
 628                 }
 629
 630                 skb_reserve(skb, 2);    /* Align IP on 16 byte boundaries */
 631
 632                 skb->dev = net;
 633
 634                 eth_copy_and_sum(skb, kaweth->rx_buf + 2, pkt_len, 0);
 635
 636                 skb_put(skb, pkt_len);
 637
 638                 skb->protocol = eth_type_trans(skb, net);
 639
 640                 netif_rx(skb);
 641
 642                 kaweth->stats.rx_packets++;
 643                 kaweth->stats.rx_bytes += pkt_len;
 644         }
 645
 646         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 647 }
 648
 649 /****************************************************************
 650  *     kaweth_open
 651  ****************************************************************/
 652 static int kaweth_open(struct net_device *net)
 653 {
 654         struct kaweth_device *kaweth = netdev_priv(net);
 655         int res;
 656
 657         kaweth_dbg("Opening network device.");
 658
 659         res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL);
 660         if (res)
 661                 return -EIO;
 662
 663         usb_fill_int_urb(
 664                 kaweth->irq_urb,
 665                 kaweth->dev,
 666                 usb_rcvintpipe(kaweth->dev, 3),
 667                 kaweth->intbuffer,
 668                 INTBUFFERSIZE,
 669                 int_callback,
 670                 kaweth,
 671                 250); /* overriding the descriptor */
 672         kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle;
 673         kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 674
 675         res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL);
 676         if (res) {
 677                 usb_kill_urb(kaweth->rx_urb);
 678                 return -EIO;
 679         }
 680
 681         netif_start_queue(net);
 682
 683         kaweth_async_set_rx_mode(kaweth);
 684         return 0;
 685 }
 686
 687 /****************************************************************
 688  *     kaweth_close
 689  ****************************************************************/
 690 static int kaweth_close(struct net_device *net)
 691 {
 692         struct kaweth_device *kaweth = netdev_priv(net);
 693
 694         netif_stop_queue(net);
 695
 696         kaweth->status |= KAWETH_STATUS_CLOSING;
 697
 698         usb_kill_urb(kaweth->irq_urb);
 699         usb_kill_urb(kaweth->rx_urb);
 700         usb_kill_urb(kaweth->tx_urb);
 701
 702         flush_scheduled_work();
 703
 704         /* a scheduled work may have resubmitted,
 705            we hit them again */
 706         usb_kill_urb(kaweth->irq_urb);
 707         usb_kill_urb(kaweth->rx_urb);
 708
 709         kaweth->status &= ~KAWETH_STATUS_CLOSING;
 710
 711         return 0;
 712 }
 713
 714 static void kaweth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
 715 {
 716
 717         strlcpy(info->driver, driver_name, sizeof(info->driver));
 718 }
 719
 720 static struct ethtool_ops ops = {
 721         .get_drvinfo = kaweth_get_drvinfo
 722 };
 723
 724 /****************************************************************
 725  *     kaweth_usb_transmit_complete
 726  ****************************************************************/
 727 static void kaweth_usb_transmit_complete(struct urb *urb, struct pt_regs *regs)
 728 {
 729         struct kaweth_device *kaweth = urb->context;
 730         struct sk_buff *skb = kaweth->tx_skb;
 731
 732         if (unlikely(urb->status != 0))
 733                 if (urb->status != -ENOENT)
 734                         kaweth_dbg("%s: TX status %d.", kaweth->net->name, urb->status);
 735
 736         netif_wake_queue(kaweth->net);
 737         dev_kfree_skb_irq(skb);
 738 }
 739
 740 /****************************************************************
 741  *     kaweth_start_xmit
 742  ****************************************************************/
 743 static int kaweth_start_xmit(struct sk_buff *skb, struct net_device *net)
 744 {
 745         struct kaweth_device *kaweth = netdev_priv(net);
 746         __le16 *private_header;
 747
 748         int res;
 749
 750         spin_lock(&kaweth->device_lock);
 751
 752         kaweth_async_set_rx_mode(kaweth);
 753         netif_stop_queue(net);
 754
 755         /* We now decide whether we can put our special header into the sk_buff */
 756         if (skb_cloned(skb) || skb_headroom(skb) < 2) {
 757                 /* no such luck - we make our own */
 758                 struct sk_buff *copied_skb;
 759                 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC);
 760                 dev_kfree_skb_irq(skb);
 761                 skb = copied_skb;
 762                 if (!copied_skb) {
 763                         kaweth->stats.tx_errors++;
 764                         netif_start_queue(net);
 765                         spin_unlock(&kaweth->device_lock);
 766                         return 0;
 767                 }
 768         }
 769
 770         private_header = (__le16 *)__skb_push(skb, 2);
 771         *private_header = cpu_to_le16(skb->len-2);
 772         kaweth->tx_skb = skb;
 773
 774         usb_fill_bulk_urb(kaweth->tx_urb,
 775                       kaweth->dev,
 776                       usb_sndbulkpipe(kaweth->dev, 2),
 777                       private_header,
 778                       skb->len,
 779                       kaweth_usb_transmit_complete,
 780                       kaweth);
 781         kaweth->end = 0;
 782
 783         if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
 784         {
 785                 kaweth_warn("kaweth failed tx_urb %d", res);
 786                 kaweth->stats.tx_errors++;
 787
 788                 netif_start_queue(net);
 789                 dev_kfree_skb_irq(skb);
 790         }
 791         else
 792         {
 793                 kaweth->stats.tx_packets++;
 794                 kaweth->stats.tx_bytes += skb->len;
 795                 net->trans_start = jiffies;
 796         }
 797
 798         spin_unlock(&kaweth->device_lock);
 799
 800         return 0;
 801 }
 802
 803 /****************************************************************
 804  *     kaweth_set_rx_mode
 805  ****************************************************************/
 806 static void kaweth_set_rx_mode(struct net_device *net)
 807 {
 808         struct kaweth_device *kaweth = netdev_priv(net);
 809
 810         __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
 811                                      KAWETH_PACKET_FILTER_BROADCAST |
 812                                      KAWETH_PACKET_FILTER_MULTICAST;
 813
 814         kaweth_dbg("Setting Rx mode to %d", packet_filter_bitmap);
 815
 816         netif_stop_queue(net);
 817
 818         if (net->flags & IFF_PROMISC) {
 819                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
 820         }
 821         else if ((net->mc_count) || (net->flags & IFF_ALLMULTI)) {
 822                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
 823         }
 824
 825         kaweth->packet_filter_bitmap = packet_filter_bitmap;
 826         netif_wake_queue(net);
 827 }
 828
 829 /****************************************************************
 830  *     kaweth_async_set_rx_mode
 831  ****************************************************************/
 832 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
 833 {
 834         __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
 835         kaweth->packet_filter_bitmap = 0;
 836         if (packet_filter_bitmap == 0)
 837                 return;
 838
 839         {
 840         int result;
 841         result = kaweth_control(kaweth,
 842                                 usb_sndctrlpipe(kaweth->dev, 0),
 843                                 KAWETH_COMMAND_SET_PACKET_FILTER,
 844                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 845                                 packet_filter_bitmap,
 846                                 0,
 847                                 (void *)&kaweth->scratch,
 848                                 0,
 849                                 KAWETH_CONTROL_TIMEOUT);
 850
 851         if(result < 0) {
 852                 kaweth_err("Failed to set Rx mode: %d", result);
 853         }
 854         else {
 855                 kaweth_dbg("Set Rx mode to %d", packet_filter_bitmap);
 856         }
 857         }
 858 }
 859
 860 /****************************************************************
 861  *     kaweth_netdev_stats
 862  ****************************************************************/
 863 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev)
 864 {
 865         struct kaweth_device *kaweth = netdev_priv(dev);
 866         return &kaweth->stats;
 867 }
 868
 869 /****************************************************************
 870  *     kaweth_tx_timeout
 871  ****************************************************************/
 872 static void kaweth_tx_timeout(struct net_device *net)
 873 {
 874         struct kaweth_device *kaweth = netdev_priv(net);
 875
 876         kaweth_warn("%s: Tx timed out. Resetting.", net->name);
 877         kaweth->stats.tx_errors++;
 878         net->trans_start = jiffies;
 879
 880         usb_unlink_urb(kaweth->tx_urb);
 881 }
 882
 883 /****************************************************************
 884  *     kaweth_probe
 885  ****************************************************************/
 886 static int kaweth_probe(
 887                 struct usb_interface *intf,
 888                 const struct usb_device_id *id      /* from id_table */
 889         )
 890 {
 891         struct usb_device *dev = interface_to_usbdev(intf);
 892         struct kaweth_device *kaweth;
 893         struct net_device *netdev;
 894         const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 895         int result = 0;
 896
 897         kaweth_dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x",
 898                  dev->devnum,
 899                  le16_to_cpu(dev->descriptor.idVendor),
 900                  le16_to_cpu(dev->descriptor.idProduct),
 901                  le16_to_cpu(dev->descriptor.bcdDevice));
 902
 903         kaweth_dbg("Device at %p", dev);
 904
 905         kaweth_dbg("Descriptor length: %x type: %x",
 906                  (int)dev->descriptor.bLength,
 907                  (int)dev->descriptor.bDescriptorType);
 908
 909         netdev = alloc_etherdev(sizeof(*kaweth));
 910         if (!netdev)
 911                 return -ENOMEM;
 912
 913         kaweth = netdev_priv(netdev);
 914         kaweth->dev = dev;
 915         kaweth->net = netdev;
 916
 917         spin_lock_init(&kaweth->device_lock);
 918         init_waitqueue_head(&kaweth->term_wait);
 919
 920         kaweth_dbg("Resetting.");
 921
 922         kaweth_reset(kaweth);
 923
 924         /*
 925          * If high byte of bcdDevice is nonzero, firmware is already
 926          * downloaded. Don't try to do it again, or we'll hang the device.
 927          */
 928
 929         if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) {
 930                 kaweth_info("Firmware present in device.");
 931         } else {
 932                 /* Download the firmware */
 933                 kaweth_info("Downloading firmware...");
 934                 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
 935                 if ((result = kaweth_download_firmware(kaweth,
 936                                                       kaweth_new_code,
 937                                                       len_kaweth_new_code,
 938                                                       100,
 939                                                       2)) < 0) {
 940                         kaweth_err("Error downloading firmware (%d)", result);
 941                         goto err_fw;
 942                 }
 943
 944                 if ((result = kaweth_download_firmware(kaweth,
 945                                                       kaweth_new_code_fix,
 946                                                       len_kaweth_new_code_fix,
 947                                                       100,
 948                                                       3)) < 0) {
 949                         kaweth_err("Error downloading firmware fix (%d)", result);
 950                         goto err_fw;
 951                 }
 952
 953                 if ((result = kaweth_download_firmware(kaweth,
 954                                                       kaweth_trigger_code,
 955                                                       len_kaweth_trigger_code,
 956                                                       126,
 957                                                       2)) < 0) {
 958                         kaweth_err("Error downloading trigger code (%d)", result);
 959                         goto err_fw;
 960
 961                 }
 962
 963                 if ((result = kaweth_download_firmware(kaweth,
 964                                                       kaweth_trigger_code_fix,
 965                                                       len_kaweth_trigger_code_fix,
 966                                                       126,
 967                                                       3)) < 0) {
 968                         kaweth_err("Error downloading trigger code fix (%d)", result);
 969                         goto err_fw;
 970                 }
 971
 972
 973                 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
 974                         kaweth_err("Error triggering firmware (%d)", result);
 975                         goto err_fw;
 976                 }
 977
 978                 /* Device will now disappear for a moment...  */
 979                 kaweth_info("Firmware loaded.  I'll be back...");
 980 err_fw:
 981                 free_page((unsigned long)kaweth->firmware_buf);
 982                 free_netdev(netdev);
 983                 return -EIO;
 984         }
 985
 986         result = kaweth_read_configuration(kaweth);
 987
 988         if(result < 0) {
 989                 kaweth_err("Error reading configuration (%d), no net device created", result);
 990                 goto err_free_netdev;
 991         }
 992
 993         kaweth_info("Statistics collection: %x", kaweth->configuration.statistics_mask);
 994         kaweth_info("Multicast filter limit: %x", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
 995         kaweth_info("MTU: %d", le16_to_cpu(kaweth->configuration.segment_size));
 996         kaweth_info("Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
 997                  (int)kaweth->configuration.hw_addr[0],
 998                  (int)kaweth->configuration.hw_addr[1],
 999                  (int)kaweth->configuration.hw_addr[2],
1000                  (int)kaweth->configuration.hw_addr[3],
1001                  (int)kaweth->configuration.hw_addr[4],
1002                  (int)kaweth->configuration.hw_addr[5]);
1003
1004         if(!memcmp(&kaweth->configuration.hw_addr,
1005                    &bcast_addr,
1006                    sizeof(bcast_addr))) {
1007                 kaweth_err("Firmware not functioning properly, no net device created");
1008                 goto err_free_netdev;
1009         }
1010
1011         if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
1012                 kaweth_dbg("Error setting URB size");
1013                 goto err_free_netdev;
1014         }
1015
1016         if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
1017                 kaweth_err("Error setting SOFS wait");
1018                 goto err_free_netdev;
1019         }
1020
1021         result = kaweth_set_receive_filter(kaweth,
1022                                            KAWETH_PACKET_FILTER_DIRECTED |
1023                                            KAWETH_PACKET_FILTER_BROADCAST |
1024                                            KAWETH_PACKET_FILTER_MULTICAST);
1025
1026         if(result < 0) {
1027                 kaweth_err("Error setting receive filter");
1028                 goto err_free_netdev;
1029         }
1030
1031         kaweth_dbg("Initializing net device.");
1032
1033         kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1034         if (!kaweth->tx_urb)
1035                 goto err_free_netdev;
1036         kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1037         if (!kaweth->rx_urb)
1038                 goto err_only_tx;
1039         kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1040         if (!kaweth->irq_urb)
1041                 goto err_tx_and_rx;
1042
1043         kaweth->intbuffer = usb_buffer_alloc(   kaweth->dev,
1044                                                 INTBUFFERSIZE,
1045                                                 GFP_KERNEL,
1046                                                 &kaweth->intbufferhandle);
1047         if (!kaweth->intbuffer)
1048                 goto err_tx_and_rx_and_irq;
1049         kaweth->rx_buf = usb_buffer_alloc(      kaweth->dev,
1050                                                 KAWETH_BUF_SIZE,
1051                                                 GFP_KERNEL,
1052                                                 &kaweth->rxbufferhandle);
1053         if (!kaweth->rx_buf)
1054                 goto err_all_but_rxbuf;
1055
1056         memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr));
1057         memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr,
1058                sizeof(kaweth->configuration.hw_addr));
1059
1060         netdev->open = kaweth_open;
1061         netdev->stop = kaweth_close;
1062
1063         netdev->watchdog_timeo = KAWETH_TX_TIMEOUT;
1064         netdev->tx_timeout = kaweth_tx_timeout;
1065
1066         netdev->hard_start_xmit = kaweth_start_xmit;
1067         netdev->set_multicast_list = kaweth_set_rx_mode;
1068         netdev->get_stats = kaweth_netdev_stats;
1069         netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size);
1070         SET_ETHTOOL_OPS(netdev, &ops);
1071
1072         /* kaweth is zeroed as part of alloc_netdev */
1073
1074         INIT_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl, (void *)kaweth);
1075
1076         SET_MODULE_OWNER(netdev);
1077
1078         usb_set_intfdata(intf, kaweth);
1079
1080 #if 0
1081 // dma_supported() is deeply broken on almost all architectures
1082         if (dma_supported (&intf->dev, 0xffffffffffffffffULL))
1083                 kaweth->net->features |= NETIF_F_HIGHDMA;
1084 #endif
1085
1086         SET_NETDEV_DEV(netdev, &intf->dev);
1087         if (register_netdev(netdev) != 0) {
1088                 kaweth_err("Error registering netdev.");
1089                 goto err_intfdata;
1090         }
1091
1092         kaweth_info("kaweth interface created at %s", kaweth->net->name);
1093
1094         kaweth_dbg("Kaweth probe returning.");
1095
1096         return 0;
1097
1098 err_intfdata:
1099         usb_set_intfdata(intf, NULL);
1100         usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1101 err_all_but_rxbuf:
1102         usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1103 err_tx_and_rx_and_irq:
1104         usb_free_urb(kaweth->irq_urb);
1105 err_tx_and_rx:
1106         usb_free_urb(kaweth->rx_urb);
1107 err_only_tx:
1108         usb_free_urb(kaweth->tx_urb);
1109 err_free_netdev:
1110         free_netdev(netdev);
1111
1112         return -EIO;
1113 }
1114
1115 /****************************************************************
1116  *     kaweth_disconnect
1117  ****************************************************************/
1118 static void kaweth_disconnect(struct usb_interface *intf)
1119 {
1120         struct kaweth_device *kaweth = usb_get_intfdata(intf);
1121         struct net_device *netdev;
1122
1123         kaweth_info("Unregistering");
1124
1125         usb_set_intfdata(intf, NULL);
1126         if (!kaweth) {
1127                 kaweth_warn("unregistering non-existant device");
1128                 return;
1129         }
1130         netdev = kaweth->net;
1131
1132         kaweth_dbg("Unregistering net device");
1133         unregister_netdev(netdev);
1134
1135         usb_free_urb(kaweth->rx_urb);
1136         usb_free_urb(kaweth->tx_urb);
1137         usb_free_urb(kaweth->irq_urb);
1138
1139         usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1140         usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1141
1142         free_netdev(netdev);
1143 }
1144
1145
1146 // FIXME this completion stuff is a modified clone of
1147 // an OLD version of some stuff in usb.c ...
1148 struct usb_api_data {
1149         wait_queue_head_t wqh;
1150         int done;
1151 };
1152
1153 /*-------------------------------------------------------------------*
1154  * completion handler for compatibility wrappers (sync control/bulk) *
1155  *-------------------------------------------------------------------*/
1156 static void usb_api_blocking_completion(struct urb *urb, struct pt_regs *regs)
1157 {
1158         struct usb_api_data *awd = (struct usb_api_data *)urb->context;
1159
1160         awd->done=1;
1161         wake_up(&awd->wqh);
1162 }
1163
1164 /*-------------------------------------------------------------------*
1165  *                         COMPATIBILITY STUFF                       *
1166  *-------------------------------------------------------------------*/
1167
1168 // Starts urb and waits for completion or timeout
1169 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
1170 {
1171         struct usb_api_data awd;
1172         int status;
1173
1174         init_waitqueue_head(&awd.wqh);
1175         awd.done = 0;
1176
1177         urb->context = &awd;
1178         status = usb_submit_urb(urb, GFP_NOIO);
1179         if (status) {
1180                 // something went wrong
1181                 usb_free_urb(urb);
1182                 return status;
1183         }
1184
1185         if (!wait_event_timeout(awd.wqh, awd.done, timeout)) {
1186                 // timeout
1187                 kaweth_warn("usb_control/bulk_msg: timeout");
1188                 usb_kill_urb(urb);  // remove urb safely
1189                 status = -ETIMEDOUT;
1190         }
1191         else {
1192                 status = urb->status;
1193         }
1194
1195         if (actual_length) {
1196                 *actual_length = urb->actual_length;
1197         }
1198
1199         usb_free_urb(urb);
1200         return status;
1201 }
1202
1203 /*-------------------------------------------------------------------*/
1204 // returns status (negative) or length (positive)
1205 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
1206                                        unsigned int pipe,
1207                                        struct usb_ctrlrequest *cmd, void *data,
1208                                        int len, int timeout)
1209 {
1210         struct urb *urb;
1211         int retv;
1212         int length;
1213
1214         urb = usb_alloc_urb(0, GFP_NOIO);
1215         if (!urb)
1216                 return -ENOMEM;
1217
1218         usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data,
1219                          len, usb_api_blocking_completion, NULL);
1220
1221         retv = usb_start_wait_urb(urb, timeout, &length);
1222         if (retv < 0) {
1223                 return retv;
1224         }
1225         else {
1226                 return length;
1227         }
1228 }
1229
1230
1231 /****************************************************************
1232  *     kaweth_init
1233  ****************************************************************/
1234 static int __init kaweth_init(void)
1235 {
1236         kaweth_dbg("Driver loading");
1237         return usb_register(&kaweth_driver);
1238 }
1239
1240 /****************************************************************
1241  *     kaweth_exit
1242  ****************************************************************/
1243 static void __exit kaweth_exit(void)
1244 {
1245         usb_deregister(&kaweth_driver);
1246 }
1247
1248 module_init(kaweth_init);
1249 module_exit(kaweth_exit);
1250
1251
1252
1253
1254
1255
1256
1257
1258