git.oblomov.eu Git - linux-2.6/blob - 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(0x1668, 0x0323) }, /* Actiontec USB Ethernet */
 169         { USB_DEVICE(0x2001, 0x4000) }, /* D-link DSB-650C */
 170         {} /* Null terminator */
 171 };
 172
 173 MODULE_DEVICE_TABLE (usb, usb_klsi_table);
 174
 175 /****************************************************************
 176  *     kaweth_driver
 177  ****************************************************************/
 178 static struct usb_driver kaweth_driver = {
 179         .name =         driver_name,
 180         .probe =        kaweth_probe,
 181         .disconnect =   kaweth_disconnect,
 182         .id_table =     usb_klsi_table,
 183 };
 184
 185 typedef __u8 eth_addr_t[6];
 186
 187 /****************************************************************
 188  *     usb_eth_dev
 189  ****************************************************************/
 190 struct usb_eth_dev {
 191         char *name;
 192         __u16 vendor;
 193         __u16 device;
 194         void *pdata;
 195 };
 196
 197 /****************************************************************
 198  *     kaweth_ethernet_configuration
 199  *     Refer Table 8
 200  ****************************************************************/
 201 struct kaweth_ethernet_configuration
 202 {
 203         __u8 size;
 204         __u8 reserved1;
 205         __u8 reserved2;
 206         eth_addr_t hw_addr;
 207         __u32 statistics_mask;
 208         __le16 segment_size;
 209         __u16 max_multicast_filters;
 210         __u8 reserved3;
 211 } __attribute__ ((packed));
 212
 213 /****************************************************************
 214  *     kaweth_device
 215  ****************************************************************/
 216 struct kaweth_device
 217 {
 218         spinlock_t device_lock;
 219
 220         __u32 status;
 221         int end;
 222         int suspend_lowmem_rx;
 223         int suspend_lowmem_ctrl;
 224         int linkstate;
 225         struct work_struct lowmem_work;
 226
 227         struct usb_device *dev;
 228         struct net_device *net;
 229         wait_queue_head_t term_wait;
 230
 231         struct urb *rx_urb;
 232         struct urb *tx_urb;
 233         struct urb *irq_urb;
 234
 235         dma_addr_t intbufferhandle;
 236         __u8 *intbuffer;
 237         dma_addr_t rxbufferhandle;
 238         __u8 *rx_buf;
 239
 240
 241         struct sk_buff *tx_skb;
 242
 243         __u8 *firmware_buf;
 244         __u8 scratch[KAWETH_SCRATCH_SIZE];
 245         __u16 packet_filter_bitmap;
 246
 247         struct kaweth_ethernet_configuration configuration;
 248
 249         struct net_device_stats stats;
 250 };
 251
 252
 253 /****************************************************************
 254  *     kaweth_control
 255  ****************************************************************/
 256 static 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
 268         kaweth_dbg("kaweth_control()");
 269
 270         if(in_interrupt()) {
 271                 kaweth_dbg("in_interrupt()");
 272                 return -EBUSY;
 273         }
 274
 275         dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
 276
 277         if (!dr) {
 278                 kaweth_dbg("kmalloc() failed");
 279                 return -ENOMEM;
 280         }
 281
 282         dr->bRequestType= requesttype;
 283         dr->bRequest = request;
 284         dr->wValue = cpu_to_le16p(&value);
 285         dr->wIndex = cpu_to_le16p(&index);
 286         dr->wLength = cpu_to_le16p(&size);
 287
 288         return kaweth_internal_control_msg(kaweth->dev,
 289                                         pipe,
 290                                         dr,
 291                                         data,
 292                                         size,
 293                                         timeout);
 294 }
 295
 296 /****************************************************************
 297  *     kaweth_read_configuration
 298  ****************************************************************/
 299 static int kaweth_read_configuration(struct kaweth_device *kaweth)
 300 {
 301         int retval;
 302
 303         kaweth_dbg("Reading kaweth configuration");
 304
 305         retval = kaweth_control(kaweth,
 306                                 usb_rcvctrlpipe(kaweth->dev, 0),
 307                                 KAWETH_COMMAND_GET_ETHERNET_DESC,
 308                                 USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE,
 309                                 0,
 310                                 0,
 311                                 (void *)&kaweth->configuration,
 312                                 sizeof(kaweth->configuration),
 313                                 KAWETH_CONTROL_TIMEOUT);
 314
 315         return retval;
 316 }
 317
 318 /****************************************************************
 319  *     kaweth_set_urb_size
 320  ****************************************************************/
 321 static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size)
 322 {
 323         int retval;
 324
 325         kaweth_dbg("Setting URB size to %d", (unsigned)urb_size);
 326
 327         retval = kaweth_control(kaweth,
 328                                 usb_sndctrlpipe(kaweth->dev, 0),
 329                                 KAWETH_COMMAND_SET_URB_SIZE,
 330                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 331                                 urb_size,
 332                                 0,
 333                                 (void *)&kaweth->scratch,
 334                                 0,
 335                                 KAWETH_CONTROL_TIMEOUT);
 336
 337         return retval;
 338 }
 339
 340 /****************************************************************
 341  *     kaweth_set_sofs_wait
 342  ****************************************************************/
 343 static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait)
 344 {
 345         int retval;
 346
 347         kaweth_dbg("Set SOFS wait to %d", (unsigned)sofs_wait);
 348
 349         retval = kaweth_control(kaweth,
 350                                 usb_sndctrlpipe(kaweth->dev, 0),
 351                                 KAWETH_COMMAND_SET_SOFS_WAIT,
 352                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 353                                 sofs_wait,
 354                                 0,
 355                                 (void *)&kaweth->scratch,
 356                                 0,
 357                                 KAWETH_CONTROL_TIMEOUT);
 358
 359         return retval;
 360 }
 361
 362 /****************************************************************
 363  *     kaweth_set_receive_filter
 364  ****************************************************************/
 365 static int kaweth_set_receive_filter(struct kaweth_device *kaweth,
 366                                      __u16 receive_filter)
 367 {
 368         int retval;
 369
 370         kaweth_dbg("Set receive filter to %d", (unsigned)receive_filter);
 371
 372         retval = kaweth_control(kaweth,
 373                                 usb_sndctrlpipe(kaweth->dev, 0),
 374                                 KAWETH_COMMAND_SET_PACKET_FILTER,
 375                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 376                                 receive_filter,
 377                                 0,
 378                                 (void *)&kaweth->scratch,
 379                                 0,
 380                                 KAWETH_CONTROL_TIMEOUT);
 381
 382         return retval;
 383 }
 384
 385 /****************************************************************
 386  *     kaweth_download_firmware
 387  ****************************************************************/
 388 static int kaweth_download_firmware(struct kaweth_device *kaweth,
 389                                     __u8 *data,
 390                                     __u16 data_len,
 391                                     __u8 interrupt,
 392                                     __u8 type)
 393 {
 394         if(data_len > KAWETH_FIRMWARE_BUF_SIZE) {
 395                 kaweth_err("Firmware too big: %d", data_len);
 396                 return -ENOSPC;
 397         }
 398
 399         memcpy(kaweth->firmware_buf, data, data_len);
 400
 401         kaweth->firmware_buf[2] = (data_len & 0xFF) - 7;
 402         kaweth->firmware_buf[3] = data_len >> 8;
 403         kaweth->firmware_buf[4] = type;
 404         kaweth->firmware_buf[5] = interrupt;
 405
 406         kaweth_dbg("High: %i, Low:%i", kaweth->firmware_buf[3],
 407                    kaweth->firmware_buf[2]);
 408
 409         kaweth_dbg("Downloading firmware at %p to kaweth device at %p",
 410             data,
 411             kaweth);
 412         kaweth_dbg("Firmware length: %d", data_len);
 413
 414         return kaweth_control(kaweth,
 415                               usb_sndctrlpipe(kaweth->dev, 0),
 416                               KAWETH_COMMAND_SCAN,
 417                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 418                               0,
 419                               0,
 420                               (void *)kaweth->firmware_buf,
 421                               data_len,
 422                               KAWETH_CONTROL_TIMEOUT);
 423 }
 424
 425 /****************************************************************
 426  *     kaweth_trigger_firmware
 427  ****************************************************************/
 428 static int kaweth_trigger_firmware(struct kaweth_device *kaweth,
 429                                    __u8 interrupt)
 430 {
 431         kaweth->firmware_buf[0] = 0xB6;
 432         kaweth->firmware_buf[1] = 0xC3;
 433         kaweth->firmware_buf[2] = 0x01;
 434         kaweth->firmware_buf[3] = 0x00;
 435         kaweth->firmware_buf[4] = 0x06;
 436         kaweth->firmware_buf[5] = interrupt;
 437         kaweth->firmware_buf[6] = 0x00;
 438         kaweth->firmware_buf[7] = 0x00;
 439
 440         kaweth_dbg("Triggering firmware");
 441
 442         return kaweth_control(kaweth,
 443                               usb_sndctrlpipe(kaweth->dev, 0),
 444                               KAWETH_COMMAND_SCAN,
 445                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 446                               0,
 447                               0,
 448                               (void *)kaweth->firmware_buf,
 449                               8,
 450                               KAWETH_CONTROL_TIMEOUT);
 451 }
 452
 453 /****************************************************************
 454  *     kaweth_reset
 455  ****************************************************************/
 456 static int kaweth_reset(struct kaweth_device *kaweth)
 457 {
 458         int result;
 459
 460         kaweth_dbg("kaweth_reset(%p)", kaweth);
 461         result = kaweth_control(kaweth,
 462                                 usb_sndctrlpipe(kaweth->dev, 0),
 463                                 USB_REQ_SET_CONFIGURATION,
 464                                 0,
 465                                 kaweth->dev->config[0].desc.bConfigurationValue,
 466                                 0,
 467                                 NULL,
 468                                 0,
 469                                 KAWETH_CONTROL_TIMEOUT);
 470
 471         mdelay(10);
 472
 473         kaweth_dbg("kaweth_reset() returns %d.",result);
 474
 475         return result;
 476 }
 477
 478 static void kaweth_usb_receive(struct urb *);
 479 static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t);
 480
 481 /****************************************************************
 482         int_callback
 483 *****************************************************************/
 484
 485 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf)
 486 {
 487         int status;
 488
 489         status = usb_submit_urb (kaweth->irq_urb, mf);
 490         if (unlikely(status == -ENOMEM)) {
 491                 kaweth->suspend_lowmem_ctrl = 1;
 492                 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
 493         } else {
 494                 kaweth->suspend_lowmem_ctrl = 0;
 495         }
 496
 497         if (status)
 498                 err ("can't resubmit intr, %s-%s, status %d",
 499                                 kaweth->dev->bus->bus_name,
 500                                 kaweth->dev->devpath, status);
 501 }
 502
 503 static void int_callback(struct urb *u)
 504 {
 505         struct kaweth_device *kaweth = u->context;
 506         int act_state;
 507
 508         switch (u->status) {
 509         case 0:                 /* success */
 510                 break;
 511         case -ECONNRESET:       /* unlink */
 512         case -ENOENT:
 513         case -ESHUTDOWN:
 514                 return;
 515         /* -EPIPE:  should clear the halt */
 516         default:                /* error */
 517                 goto resubmit;
 518         }
 519
 520         /* we check the link state to report changes */
 521         if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) {
 522                 if (act_state)
 523                         netif_carrier_on(kaweth->net);
 524                 else
 525                         netif_carrier_off(kaweth->net);
 526
 527                 kaweth->linkstate = act_state;
 528         }
 529 resubmit:
 530         kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC);
 531 }
 532
 533 static void kaweth_resubmit_tl(void *d)
 534 {
 535         struct kaweth_device *kaweth = (struct kaweth_device *)d;
 536
 537         if (kaweth->status | KAWETH_STATUS_CLOSING)
 538                 return;
 539
 540         if (kaweth->suspend_lowmem_rx)
 541                 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
 542
 543         if (kaweth->suspend_lowmem_ctrl)
 544                 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
 545 }
 546
 547
 548 /****************************************************************
 549  *     kaweth_resubmit_rx_urb
 550  ****************************************************************/
 551 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth,
 552                                                 gfp_t mem_flags)
 553 {
 554         int result;
 555
 556         usb_fill_bulk_urb(kaweth->rx_urb,
 557                       kaweth->dev,
 558                       usb_rcvbulkpipe(kaweth->dev, 1),
 559                       kaweth->rx_buf,
 560                       KAWETH_BUF_SIZE,
 561                       kaweth_usb_receive,
 562                       kaweth);
 563         kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 564         kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle;
 565
 566         if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) {
 567                 if (result == -ENOMEM) {
 568                         kaweth->suspend_lowmem_rx = 1;
 569                         schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
 570                 }
 571                 kaweth_err("resubmitting rx_urb %d failed", result);
 572         } else {
 573                 kaweth->suspend_lowmem_rx = 0;
 574         }
 575
 576         return result;
 577 }
 578
 579 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth);
 580
 581 /****************************************************************
 582  *     kaweth_usb_receive
 583  ****************************************************************/
 584 static void kaweth_usb_receive(struct urb *urb)
 585 {
 586         struct kaweth_device *kaweth = urb->context;
 587         struct net_device *net = kaweth->net;
 588
 589         int count = urb->actual_length;
 590         int count2 = urb->transfer_buffer_length;
 591
 592         __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf);
 593
 594         struct sk_buff *skb;
 595
 596         if(unlikely(urb->status == -ECONNRESET || urb->status == -ESHUTDOWN))
 597         /* we are killed - set a flag and wake the disconnect handler */
 598         {
 599                 kaweth->end = 1;
 600                 wake_up(&kaweth->term_wait);
 601                 return;
 602         }
 603
 604         if (kaweth->status & KAWETH_STATUS_CLOSING)
 605                 return;
 606
 607         if(urb->status && urb->status != -EREMOTEIO && count != 1) {
 608                 kaweth_err("%s RX status: %d count: %d packet_len: %d",
 609                            net->name,
 610                            urb->status,
 611                            count,
 612                            (int)pkt_len);
 613                 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 614                 return;
 615         }
 616
 617         if(kaweth->net && (count > 2)) {
 618                 if(pkt_len > (count - 2)) {
 619                         kaweth_err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count);
 620                         kaweth_err("Packet len & 2047: %x", pkt_len & 2047);
 621                         kaweth_err("Count 2: %x", count2);
 622                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 623                         return;
 624                 }
 625
 626                 if(!(skb = dev_alloc_skb(pkt_len+2))) {
 627                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 628                         return;
 629                 }
 630
 631                 skb_reserve(skb, 2);    /* Align IP on 16 byte boundaries */
 632
 633                 skb->dev = net;
 634
 635                 eth_copy_and_sum(skb, kaweth->rx_buf + 2, pkt_len, 0);
 636
 637                 skb_put(skb, pkt_len);
 638
 639                 skb->protocol = eth_type_trans(skb, net);
 640
 641                 netif_rx(skb);
 642
 643                 kaweth->stats.rx_packets++;
 644                 kaweth->stats.rx_bytes += pkt_len;
 645         }
 646
 647         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 648 }
 649
 650 /****************************************************************
 651  *     kaweth_open
 652  ****************************************************************/
 653 static int kaweth_open(struct net_device *net)
 654 {
 655         struct kaweth_device *kaweth = netdev_priv(net);
 656         int res;
 657
 658         kaweth_dbg("Opening network device.");
 659
 660         res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL);
 661         if (res)
 662                 return -EIO;
 663
 664         usb_fill_int_urb(
 665                 kaweth->irq_urb,
 666                 kaweth->dev,
 667                 usb_rcvintpipe(kaweth->dev, 3),
 668                 kaweth->intbuffer,
 669                 INTBUFFERSIZE,
 670                 int_callback,
 671                 kaweth,
 672                 250); /* overriding the descriptor */
 673         kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle;
 674         kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 675
 676         res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL);
 677         if (res) {
 678                 usb_kill_urb(kaweth->rx_urb);
 679                 return -EIO;
 680         }
 681
 682         netif_start_queue(net);
 683
 684         kaweth_async_set_rx_mode(kaweth);
 685         return 0;
 686 }
 687
 688 /****************************************************************
 689  *     kaweth_close
 690  ****************************************************************/
 691 static int kaweth_close(struct net_device *net)
 692 {
 693         struct kaweth_device *kaweth = netdev_priv(net);
 694
 695         netif_stop_queue(net);
 696
 697         kaweth->status |= KAWETH_STATUS_CLOSING;
 698
 699         usb_kill_urb(kaweth->irq_urb);
 700         usb_kill_urb(kaweth->rx_urb);
 701         usb_kill_urb(kaweth->tx_urb);
 702
 703         flush_scheduled_work();
 704
 705         /* a scheduled work may have resubmitted,
 706            we hit them again */
 707         usb_kill_urb(kaweth->irq_urb);
 708         usb_kill_urb(kaweth->rx_urb);
 709
 710         kaweth->status &= ~KAWETH_STATUS_CLOSING;
 711
 712         return 0;
 713 }
 714
 715 static void kaweth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
 716 {
 717
 718         strlcpy(info->driver, driver_name, sizeof(info->driver));
 719 }
 720
 721 static struct ethtool_ops ops = {
 722         .get_drvinfo = kaweth_get_drvinfo
 723 };
 724
 725 /****************************************************************
 726  *     kaweth_usb_transmit_complete
 727  ****************************************************************/
 728 static void kaweth_usb_transmit_complete(struct urb *urb)
 729 {
 730         struct kaweth_device *kaweth = urb->context;
 731         struct sk_buff *skb = kaweth->tx_skb;
 732
 733         if (unlikely(urb->status != 0))
 734                 if (urb->status != -ENOENT)
 735                         kaweth_dbg("%s: TX status %d.", kaweth->net->name, urb->status);
 736
 737         netif_wake_queue(kaweth->net);
 738         dev_kfree_skb_irq(skb);
 739 }
 740
 741 /****************************************************************
 742  *     kaweth_start_xmit
 743  ****************************************************************/
 744 static int kaweth_start_xmit(struct sk_buff *skb, struct net_device *net)
 745 {
 746         struct kaweth_device *kaweth = netdev_priv(net);
 747         __le16 *private_header;
 748
 749         int res;
 750
 751         spin_lock(&kaweth->device_lock);
 752
 753         kaweth_async_set_rx_mode(kaweth);
 754         netif_stop_queue(net);
 755
 756         /* We now decide whether we can put our special header into the sk_buff */
 757         if (skb_cloned(skb) || skb_headroom(skb) < 2) {
 758                 /* no such luck - we make our own */
 759                 struct sk_buff *copied_skb;
 760                 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC);
 761                 dev_kfree_skb_irq(skb);
 762                 skb = copied_skb;
 763                 if (!copied_skb) {
 764                         kaweth->stats.tx_errors++;
 765                         netif_start_queue(net);
 766                         spin_unlock(&kaweth->device_lock);
 767                         return 0;
 768                 }
 769         }
 770
 771         private_header = (__le16 *)__skb_push(skb, 2);
 772         *private_header = cpu_to_le16(skb->len-2);
 773         kaweth->tx_skb = skb;
 774
 775         usb_fill_bulk_urb(kaweth->tx_urb,
 776                       kaweth->dev,
 777                       usb_sndbulkpipe(kaweth->dev, 2),
 778                       private_header,
 779                       skb->len,
 780                       kaweth_usb_transmit_complete,
 781                       kaweth);
 782         kaweth->end = 0;
 783
 784         if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
 785         {
 786                 kaweth_warn("kaweth failed tx_urb %d", res);
 787                 kaweth->stats.tx_errors++;
 788
 789                 netif_start_queue(net);
 790                 dev_kfree_skb_irq(skb);
 791         }
 792         else
 793         {
 794                 kaweth->stats.tx_packets++;
 795                 kaweth->stats.tx_bytes += skb->len;
 796                 net->trans_start = jiffies;
 797         }
 798
 799         spin_unlock(&kaweth->device_lock);
 800
 801         return 0;
 802 }
 803
 804 /****************************************************************
 805  *     kaweth_set_rx_mode
 806  ****************************************************************/
 807 static void kaweth_set_rx_mode(struct net_device *net)
 808 {
 809         struct kaweth_device *kaweth = netdev_priv(net);
 810
 811         __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
 812                                      KAWETH_PACKET_FILTER_BROADCAST |
 813                                      KAWETH_PACKET_FILTER_MULTICAST;
 814
 815         kaweth_dbg("Setting Rx mode to %d", packet_filter_bitmap);
 816
 817         netif_stop_queue(net);
 818
 819         if (net->flags & IFF_PROMISC) {
 820                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
 821         }
 822         else if ((net->mc_count) || (net->flags & IFF_ALLMULTI)) {
 823                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
 824         }
 825
 826         kaweth->packet_filter_bitmap = packet_filter_bitmap;
 827         netif_wake_queue(net);
 828 }
 829
 830 /****************************************************************
 831  *     kaweth_async_set_rx_mode
 832  ****************************************************************/
 833 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
 834 {
 835         __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
 836         kaweth->packet_filter_bitmap = 0;
 837         if (packet_filter_bitmap == 0)
 838                 return;
 839
 840         {
 841         int result;
 842         result = kaweth_control(kaweth,
 843                                 usb_sndctrlpipe(kaweth->dev, 0),
 844                                 KAWETH_COMMAND_SET_PACKET_FILTER,
 845                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 846                                 packet_filter_bitmap,
 847                                 0,
 848                                 (void *)&kaweth->scratch,
 849                                 0,
 850                                 KAWETH_CONTROL_TIMEOUT);
 851
 852         if(result < 0) {
 853                 kaweth_err("Failed to set Rx mode: %d", result);
 854         }
 855         else {
 856                 kaweth_dbg("Set Rx mode to %d", packet_filter_bitmap);
 857         }
 858         }
 859 }
 860
 861 /****************************************************************
 862  *     kaweth_netdev_stats
 863  ****************************************************************/
 864 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev)
 865 {
 866         struct kaweth_device *kaweth = netdev_priv(dev);
 867         return &kaweth->stats;
 868 }
 869
 870 /****************************************************************
 871  *     kaweth_tx_timeout
 872  ****************************************************************/
 873 static void kaweth_tx_timeout(struct net_device *net)
 874 {
 875         struct kaweth_device *kaweth = netdev_priv(net);
 876
 877         kaweth_warn("%s: Tx timed out. Resetting.", net->name);
 878         kaweth->stats.tx_errors++;
 879         net->trans_start = jiffies;
 880
 881         usb_unlink_urb(kaweth->tx_urb);
 882 }
 883
 884 /****************************************************************
 885  *     kaweth_probe
 886  ****************************************************************/
 887 static int kaweth_probe(
 888                 struct usb_interface *intf,
 889                 const struct usb_device_id *id      /* from id_table */
 890         )
 891 {
 892         struct usb_device *dev = interface_to_usbdev(intf);
 893         struct kaweth_device *kaweth;
 894         struct net_device *netdev;
 895         const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 896         int result = 0;
 897
 898         kaweth_dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x",
 899                  dev->devnum,
 900                  le16_to_cpu(dev->descriptor.idVendor),
 901                  le16_to_cpu(dev->descriptor.idProduct),
 902                  le16_to_cpu(dev->descriptor.bcdDevice));
 903
 904         kaweth_dbg("Device at %p", dev);
 905
 906         kaweth_dbg("Descriptor length: %x type: %x",
 907                  (int)dev->descriptor.bLength,
 908                  (int)dev->descriptor.bDescriptorType);
 909
 910         netdev = alloc_etherdev(sizeof(*kaweth));
 911         if (!netdev)
 912                 return -ENOMEM;
 913
 914         kaweth = netdev_priv(netdev);
 915         kaweth->dev = dev;
 916         kaweth->net = netdev;
 917
 918         spin_lock_init(&kaweth->device_lock);
 919         init_waitqueue_head(&kaweth->term_wait);
 920
 921         kaweth_dbg("Resetting.");
 922
 923         kaweth_reset(kaweth);
 924
 925         /*
 926          * If high byte of bcdDevice is nonzero, firmware is already
 927          * downloaded. Don't try to do it again, or we'll hang the device.
 928          */
 929
 930         if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) {
 931                 kaweth_info("Firmware present in device.");
 932         } else {
 933                 /* Download the firmware */
 934                 kaweth_info("Downloading firmware...");
 935                 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
 936                 if ((result = kaweth_download_firmware(kaweth,
 937                                                       kaweth_new_code,
 938                                                       len_kaweth_new_code,
 939                                                       100,
 940                                                       2)) < 0) {
 941                         kaweth_err("Error downloading firmware (%d)", result);
 942                         goto err_fw;
 943                 }
 944
 945                 if ((result = kaweth_download_firmware(kaweth,
 946                                                       kaweth_new_code_fix,
 947                                                       len_kaweth_new_code_fix,
 948                                                       100,
 949                                                       3)) < 0) {
 950                         kaweth_err("Error downloading firmware fix (%d)", result);
 951                         goto err_fw;
 952                 }
 953
 954                 if ((result = kaweth_download_firmware(kaweth,
 955                                                       kaweth_trigger_code,
 956                                                       len_kaweth_trigger_code,
 957                                                       126,
 958                                                       2)) < 0) {
 959                         kaweth_err("Error downloading trigger code (%d)", result);
 960                         goto err_fw;
 961
 962                 }
 963
 964                 if ((result = kaweth_download_firmware(kaweth,
 965                                                       kaweth_trigger_code_fix,
 966                                                       len_kaweth_trigger_code_fix,
 967                                                       126,
 968                                                       3)) < 0) {
 969                         kaweth_err("Error downloading trigger code fix (%d)", result);
 970                         goto err_fw;
 971                 }
 972
 973
 974                 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
 975                         kaweth_err("Error triggering firmware (%d)", result);
 976                         goto err_fw;
 977                 }
 978
 979                 /* Device will now disappear for a moment...  */
 980                 kaweth_info("Firmware loaded.  I'll be back...");
 981 err_fw:
 982                 free_page((unsigned long)kaweth->firmware_buf);
 983                 free_netdev(netdev);
 984                 return -EIO;
 985         }
 986
 987         result = kaweth_read_configuration(kaweth);
 988
 989         if(result < 0) {
 990                 kaweth_err("Error reading configuration (%d), no net device created", result);
 991                 goto err_free_netdev;
 992         }
 993
 994         kaweth_info("Statistics collection: %x", kaweth->configuration.statistics_mask);
 995         kaweth_info("Multicast filter limit: %x", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
 996         kaweth_info("MTU: %d", le16_to_cpu(kaweth->configuration.segment_size));
 997         kaweth_info("Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
 998                  (int)kaweth->configuration.hw_addr[0],
 999                  (int)kaweth->configuration.hw_addr[1],
1000                  (int)kaweth->configuration.hw_addr[2],
1001                  (int)kaweth->configuration.hw_addr[3],
1002                  (int)kaweth->configuration.hw_addr[4],
1003                  (int)kaweth->configuration.hw_addr[5]);
1004
1005         if(!memcmp(&kaweth->configuration.hw_addr,
1006                    &bcast_addr,
1007                    sizeof(bcast_addr))) {
1008                 kaweth_err("Firmware not functioning properly, no net device created");
1009                 goto err_free_netdev;
1010         }
1011
1012         if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
1013                 kaweth_dbg("Error setting URB size");
1014                 goto err_free_netdev;
1015         }
1016
1017         if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
1018                 kaweth_err("Error setting SOFS wait");
1019                 goto err_free_netdev;
1020         }
1021
1022         result = kaweth_set_receive_filter(kaweth,
1023                                            KAWETH_PACKET_FILTER_DIRECTED |
1024                                            KAWETH_PACKET_FILTER_BROADCAST |
1025                                            KAWETH_PACKET_FILTER_MULTICAST);
1026
1027         if(result < 0) {
1028                 kaweth_err("Error setting receive filter");
1029                 goto err_free_netdev;
1030         }
1031
1032         kaweth_dbg("Initializing net device.");
1033
1034         kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1035         if (!kaweth->tx_urb)
1036                 goto err_free_netdev;
1037         kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1038         if (!kaweth->rx_urb)
1039                 goto err_only_tx;
1040         kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1041         if (!kaweth->irq_urb)
1042                 goto err_tx_and_rx;
1043
1044         kaweth->intbuffer = usb_buffer_alloc(   kaweth->dev,
1045                                                 INTBUFFERSIZE,
1046                                                 GFP_KERNEL,
1047                                                 &kaweth->intbufferhandle);
1048         if (!kaweth->intbuffer)
1049                 goto err_tx_and_rx_and_irq;
1050         kaweth->rx_buf = usb_buffer_alloc(      kaweth->dev,
1051                                                 KAWETH_BUF_SIZE,
1052                                                 GFP_KERNEL,
1053                                                 &kaweth->rxbufferhandle);
1054         if (!kaweth->rx_buf)
1055                 goto err_all_but_rxbuf;
1056
1057         memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr));
1058         memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr,
1059                sizeof(kaweth->configuration.hw_addr));
1060
1061         netdev->open = kaweth_open;
1062         netdev->stop = kaweth_close;
1063
1064         netdev->watchdog_timeo = KAWETH_TX_TIMEOUT;
1065         netdev->tx_timeout = kaweth_tx_timeout;
1066
1067         netdev->hard_start_xmit = kaweth_start_xmit;
1068         netdev->set_multicast_list = kaweth_set_rx_mode;
1069         netdev->get_stats = kaweth_netdev_stats;
1070         netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size);
1071         SET_ETHTOOL_OPS(netdev, &ops);
1072
1073         /* kaweth is zeroed as part of alloc_netdev */
1074
1075         INIT_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl, (void *)kaweth);
1076
1077         SET_MODULE_OWNER(netdev);
1078
1079         usb_set_intfdata(intf, kaweth);
1080
1081 #if 0
1082 // dma_supported() is deeply broken on almost all architectures
1083         if (dma_supported (&intf->dev, 0xffffffffffffffffULL))
1084                 kaweth->net->features |= NETIF_F_HIGHDMA;
1085 #endif
1086
1087         SET_NETDEV_DEV(netdev, &intf->dev);
1088         if (register_netdev(netdev) != 0) {
1089                 kaweth_err("Error registering netdev.");
1090                 goto err_intfdata;
1091         }
1092
1093         kaweth_info("kaweth interface created at %s", kaweth->net->name);
1094
1095         kaweth_dbg("Kaweth probe returning.");
1096
1097         return 0;
1098
1099 err_intfdata:
1100         usb_set_intfdata(intf, NULL);
1101         usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1102 err_all_but_rxbuf:
1103         usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1104 err_tx_and_rx_and_irq:
1105         usb_free_urb(kaweth->irq_urb);
1106 err_tx_and_rx:
1107         usb_free_urb(kaweth->rx_urb);
1108 err_only_tx:
1109         usb_free_urb(kaweth->tx_urb);
1110 err_free_netdev:
1111         free_netdev(netdev);
1112
1113         return -EIO;
1114 }
1115
1116 /****************************************************************
1117  *     kaweth_disconnect
1118  ****************************************************************/
1119 static void kaweth_disconnect(struct usb_interface *intf)
1120 {
1121         struct kaweth_device *kaweth = usb_get_intfdata(intf);
1122         struct net_device *netdev;
1123
1124         kaweth_info("Unregistering");
1125
1126         usb_set_intfdata(intf, NULL);
1127         if (!kaweth) {
1128                 kaweth_warn("unregistering non-existant device");
1129                 return;
1130         }
1131         netdev = kaweth->net;
1132
1133         kaweth_dbg("Unregistering net device");
1134         unregister_netdev(netdev);
1135
1136         usb_free_urb(kaweth->rx_urb);
1137         usb_free_urb(kaweth->tx_urb);
1138         usb_free_urb(kaweth->irq_urb);
1139
1140         usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1141         usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1142
1143         free_netdev(netdev);
1144 }
1145
1146
1147 // FIXME this completion stuff is a modified clone of
1148 // an OLD version of some stuff in usb.c ...
1149 struct usb_api_data {
1150         wait_queue_head_t wqh;
1151         int done;
1152 };
1153
1154 /*-------------------------------------------------------------------*
1155  * completion handler for compatibility wrappers (sync control/bulk) *
1156  *-------------------------------------------------------------------*/
1157 static void usb_api_blocking_completion(struct urb *urb)
1158 {
1159         struct usb_api_data *awd = (struct usb_api_data *)urb->context;
1160
1161         awd->done=1;
1162         wake_up(&awd->wqh);
1163 }
1164
1165 /*-------------------------------------------------------------------*
1166  *                         COMPATIBILITY STUFF                       *
1167  *-------------------------------------------------------------------*/
1168
1169 // Starts urb and waits for completion or timeout
1170 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
1171 {
1172         struct usb_api_data awd;
1173         int status;
1174
1175         init_waitqueue_head(&awd.wqh);
1176         awd.done = 0;
1177
1178         urb->context = &awd;
1179         status = usb_submit_urb(urb, GFP_NOIO);
1180         if (status) {
1181                 // something went wrong
1182                 usb_free_urb(urb);
1183                 return status;
1184         }
1185
1186         if (!wait_event_timeout(awd.wqh, awd.done, timeout)) {
1187                 // timeout
1188                 kaweth_warn("usb_control/bulk_msg: timeout");
1189                 usb_kill_urb(urb);  // remove urb safely
1190                 status = -ETIMEDOUT;
1191         }
1192         else {
1193                 status = urb->status;
1194         }
1195
1196         if (actual_length) {
1197                 *actual_length = urb->actual_length;
1198         }
1199
1200         usb_free_urb(urb);
1201         return status;
1202 }
1203
1204 /*-------------------------------------------------------------------*/
1205 // returns status (negative) or length (positive)
1206 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
1207                                        unsigned int pipe,
1208                                        struct usb_ctrlrequest *cmd, void *data,
1209                                        int len, int timeout)
1210 {
1211         struct urb *urb;
1212         int retv;
1213         int length;
1214
1215         urb = usb_alloc_urb(0, GFP_NOIO);
1216         if (!urb)
1217                 return -ENOMEM;
1218
1219         usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data,
1220                          len, usb_api_blocking_completion, NULL);
1221
1222         retv = usb_start_wait_urb(urb, timeout, &length);
1223         if (retv < 0) {
1224                 return retv;
1225         }
1226         else {
1227                 return length;
1228         }
1229 }
1230
1231
1232 /****************************************************************
1233  *     kaweth_init
1234  ****************************************************************/
1235 static int __init kaweth_init(void)
1236 {
1237         kaweth_dbg("Driver loading");
1238         return usb_register(&kaweth_driver);
1239 }
1240
1241 /****************************************************************
1242  *     kaweth_exit
1243  ****************************************************************/
1244 static void __exit kaweth_exit(void)
1245 {
1246         usb_deregister(&kaweth_driver);
1247 }
1248
1249 module_init(kaweth_init);
1250 module_exit(kaweth_exit);
1251
1252
1253
1254
1255
1256
1257
1258
1259