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         .owner =        THIS_MODULE,
 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 removed;
 223         int suspend_lowmem_rx;
 224         int suspend_lowmem_ctrl;
 225         int linkstate;
 226         struct work_struct lowmem_work;
 227
 228         struct usb_device *dev;
 229         struct net_device *net;
 230         wait_queue_head_t term_wait;
 231
 232         struct urb *rx_urb;
 233         struct urb *tx_urb;
 234         struct urb *irq_urb;
 235
 236         dma_addr_t intbufferhandle;
 237         __u8 *intbuffer;
 238         dma_addr_t rxbufferhandle;
 239         __u8 *rx_buf;
 240
 241
 242         struct sk_buff *tx_skb;
 243
 244         __u8 *firmware_buf;
 245         __u8 scratch[KAWETH_SCRATCH_SIZE];
 246         __u16 packet_filter_bitmap;
 247
 248         struct kaweth_ethernet_configuration configuration;
 249
 250         struct net_device_stats stats;
 251 };
 252
 253
 254 /****************************************************************
 255  *     kaweth_control
 256  ****************************************************************/
 257 static int kaweth_control(struct kaweth_device *kaweth,
 258                           unsigned int pipe,
 259                           __u8 request,
 260                           __u8 requesttype,
 261                           __u16 value,
 262                           __u16 index,
 263                           void *data,
 264                           __u16 size,
 265                           int timeout)
 266 {
 267         struct usb_ctrlrequest *dr;
 268
 269         kaweth_dbg("kaweth_control()");
 270
 271         if(in_interrupt()) {
 272                 kaweth_dbg("in_interrupt()");
 273                 return -EBUSY;
 274         }
 275
 276         dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
 277
 278         if (!dr) {
 279                 kaweth_dbg("kmalloc() failed");
 280                 return -ENOMEM;
 281         }
 282
 283         dr->bRequestType= requesttype;
 284         dr->bRequest = request;
 285         dr->wValue = cpu_to_le16p(&value);
 286         dr->wIndex = cpu_to_le16p(&index);
 287         dr->wLength = cpu_to_le16p(&size);
 288
 289         return kaweth_internal_control_msg(kaweth->dev,
 290                                         pipe,
 291                                         dr,
 292                                         data,
 293                                         size,
 294                                         timeout);
 295 }
 296
 297 /****************************************************************
 298  *     kaweth_read_configuration
 299  ****************************************************************/
 300 static int kaweth_read_configuration(struct kaweth_device *kaweth)
 301 {
 302         int retval;
 303
 304         kaweth_dbg("Reading kaweth configuration");
 305
 306         retval = kaweth_control(kaweth,
 307                                 usb_rcvctrlpipe(kaweth->dev, 0),
 308                                 KAWETH_COMMAND_GET_ETHERNET_DESC,
 309                                 USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE,
 310                                 0,
 311                                 0,
 312                                 (void *)&kaweth->configuration,
 313                                 sizeof(kaweth->configuration),
 314                                 KAWETH_CONTROL_TIMEOUT);
 315
 316         return retval;
 317 }
 318
 319 /****************************************************************
 320  *     kaweth_set_urb_size
 321  ****************************************************************/
 322 static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size)
 323 {
 324         int retval;
 325
 326         kaweth_dbg("Setting URB size to %d", (unsigned)urb_size);
 327
 328         retval = kaweth_control(kaweth,
 329                                 usb_sndctrlpipe(kaweth->dev, 0),
 330                                 KAWETH_COMMAND_SET_URB_SIZE,
 331                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 332                                 urb_size,
 333                                 0,
 334                                 (void *)&kaweth->scratch,
 335                                 0,
 336                                 KAWETH_CONTROL_TIMEOUT);
 337
 338         return retval;
 339 }
 340
 341 /****************************************************************
 342  *     kaweth_set_sofs_wait
 343  ****************************************************************/
 344 static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait)
 345 {
 346         int retval;
 347
 348         kaweth_dbg("Set SOFS wait to %d", (unsigned)sofs_wait);
 349
 350         retval = kaweth_control(kaweth,
 351                                 usb_sndctrlpipe(kaweth->dev, 0),
 352                                 KAWETH_COMMAND_SET_SOFS_WAIT,
 353                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 354                                 sofs_wait,
 355                                 0,
 356                                 (void *)&kaweth->scratch,
 357                                 0,
 358                                 KAWETH_CONTROL_TIMEOUT);
 359
 360         return retval;
 361 }
 362
 363 /****************************************************************
 364  *     kaweth_set_receive_filter
 365  ****************************************************************/
 366 static int kaweth_set_receive_filter(struct kaweth_device *kaweth,
 367                                      __u16 receive_filter)
 368 {
 369         int retval;
 370
 371         kaweth_dbg("Set receive filter to %d", (unsigned)receive_filter);
 372
 373         retval = kaweth_control(kaweth,
 374                                 usb_sndctrlpipe(kaweth->dev, 0),
 375                                 KAWETH_COMMAND_SET_PACKET_FILTER,
 376                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 377                                 receive_filter,
 378                                 0,
 379                                 (void *)&kaweth->scratch,
 380                                 0,
 381                                 KAWETH_CONTROL_TIMEOUT);
 382
 383         return retval;
 384 }
 385
 386 /****************************************************************
 387  *     kaweth_download_firmware
 388  ****************************************************************/
 389 static int kaweth_download_firmware(struct kaweth_device *kaweth,
 390                                     __u8 *data,
 391                                     __u16 data_len,
 392                                     __u8 interrupt,
 393                                     __u8 type)
 394 {
 395         if(data_len > KAWETH_FIRMWARE_BUF_SIZE) {
 396                 kaweth_err("Firmware too big: %d", data_len);
 397                 return -ENOSPC;
 398         }
 399
 400         memcpy(kaweth->firmware_buf, data, data_len);
 401
 402         kaweth->firmware_buf[2] = (data_len & 0xFF) - 7;
 403         kaweth->firmware_buf[3] = data_len >> 8;
 404         kaweth->firmware_buf[4] = type;
 405         kaweth->firmware_buf[5] = interrupt;
 406
 407         kaweth_dbg("High: %i, Low:%i", kaweth->firmware_buf[3],
 408                    kaweth->firmware_buf[2]);
 409
 410         kaweth_dbg("Downloading firmware at %p to kaweth device at %p",
 411             data,
 412             kaweth);
 413         kaweth_dbg("Firmware length: %d", data_len);
 414
 415         return kaweth_control(kaweth,
 416                               usb_sndctrlpipe(kaweth->dev, 0),
 417                               KAWETH_COMMAND_SCAN,
 418                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 419                               0,
 420                               0,
 421                               (void *)kaweth->firmware_buf,
 422                               data_len,
 423                               KAWETH_CONTROL_TIMEOUT);
 424 }
 425
 426 /****************************************************************
 427  *     kaweth_trigger_firmware
 428  ****************************************************************/
 429 static int kaweth_trigger_firmware(struct kaweth_device *kaweth,
 430                                    __u8 interrupt)
 431 {
 432         kaweth->firmware_buf[0] = 0xB6;
 433         kaweth->firmware_buf[1] = 0xC3;
 434         kaweth->firmware_buf[2] = 0x01;
 435         kaweth->firmware_buf[3] = 0x00;
 436         kaweth->firmware_buf[4] = 0x06;
 437         kaweth->firmware_buf[5] = interrupt;
 438         kaweth->firmware_buf[6] = 0x00;
 439         kaweth->firmware_buf[7] = 0x00;
 440
 441         kaweth_dbg("Triggering firmware");
 442
 443         return kaweth_control(kaweth,
 444                               usb_sndctrlpipe(kaweth->dev, 0),
 445                               KAWETH_COMMAND_SCAN,
 446                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 447                               0,
 448                               0,
 449                               (void *)kaweth->firmware_buf,
 450                               8,
 451                               KAWETH_CONTROL_TIMEOUT);
 452 }
 453
 454 /****************************************************************
 455  *     kaweth_reset
 456  ****************************************************************/
 457 static int kaweth_reset(struct kaweth_device *kaweth)
 458 {
 459         int result;
 460
 461         kaweth_dbg("kaweth_reset(%p)", kaweth);
 462         result = kaweth_control(kaweth,
 463                                 usb_sndctrlpipe(kaweth->dev, 0),
 464                                 USB_REQ_SET_CONFIGURATION,
 465                                 0,
 466                                 kaweth->dev->config[0].desc.bConfigurationValue,
 467                                 0,
 468                                 NULL,
 469                                 0,
 470                                 KAWETH_CONTROL_TIMEOUT);
 471
 472         udelay(10000);
 473
 474         kaweth_dbg("kaweth_reset() returns %d.",result);
 475
 476         return result;
 477 }
 478
 479 static void kaweth_usb_receive(struct urb *, struct pt_regs *regs);
 480 static int kaweth_resubmit_rx_urb(struct kaweth_device *, int);
 481
 482 /****************************************************************
 483         int_callback
 484 *****************************************************************/
 485
 486 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, int mf)
 487 {
 488         int status;
 489
 490         status = usb_submit_urb (kaweth->irq_urb, mf);
 491         if (unlikely(status == -ENOMEM)) {
 492                 kaweth->suspend_lowmem_ctrl = 1;
 493                 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
 494         } else {
 495                 kaweth->suspend_lowmem_ctrl = 0;
 496         }
 497
 498         if (status)
 499                 err ("can't resubmit intr, %s-%s, status %d",
 500                                 kaweth->dev->bus->bus_name,
 501                                 kaweth->dev->devpath, status);
 502 }
 503
 504 static void int_callback(struct urb *u, struct pt_regs *regs)
 505 {
 506         struct kaweth_device *kaweth = u->context;
 507         int act_state;
 508
 509         switch (u->status) {
 510         case 0:                 /* success */
 511                 break;
 512         case -ECONNRESET:       /* unlink */
 513         case -ENOENT:
 514         case -ESHUTDOWN:
 515                 return;
 516         /* -EPIPE:  should clear the halt */
 517         default:                /* error */
 518                 goto resubmit;
 519         }
 520
 521         /* we check the link state to report changes */
 522         if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) {
 523                 if (!act_state)
 524                         netif_carrier_on(kaweth->net);
 525                 else
 526                         netif_carrier_off(kaweth->net);
 527
 528                 kaweth->linkstate = act_state;
 529         }
 530 resubmit:
 531         kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC);
 532 }
 533
 534 static void kaweth_resubmit_tl(void *d)
 535 {
 536         struct kaweth_device *kaweth = (struct kaweth_device *)d;
 537
 538         if (kaweth->status | KAWETH_STATUS_CLOSING)
 539                 return;
 540
 541         if (kaweth->suspend_lowmem_rx)
 542                 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
 543
 544         if (kaweth->suspend_lowmem_ctrl)
 545                 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
 546 }
 547
 548
 549 /****************************************************************
 550  *     kaweth_resubmit_rx_urb
 551  ****************************************************************/
 552 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth,
 553                                                 int mem_flags)
 554 {
 555         int result;
 556
 557         usb_fill_bulk_urb(kaweth->rx_urb,
 558                       kaweth->dev,
 559                       usb_rcvbulkpipe(kaweth->dev, 1),
 560                       kaweth->rx_buf,
 561                       KAWETH_BUF_SIZE,
 562                       kaweth_usb_receive,
 563                       kaweth);
 564         kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 565         kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle;
 566
 567         if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) {
 568                 if (result == -ENOMEM) {
 569                         kaweth->suspend_lowmem_rx = 1;
 570                         schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
 571                 }
 572                 kaweth_err("resubmitting rx_urb %d failed", result);
 573         } else {
 574                 kaweth->suspend_lowmem_rx = 0;
 575         }
 576
 577         return result;
 578 }
 579
 580 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth);
 581
 582 /****************************************************************
 583  *     kaweth_usb_receive
 584  ****************************************************************/
 585 static void kaweth_usb_receive(struct urb *urb, struct pt_regs *regs)
 586 {
 587         struct kaweth_device *kaweth = urb->context;
 588         struct net_device *net = kaweth->net;
 589
 590         int count = urb->actual_length;
 591         int count2 = urb->transfer_buffer_length;
 592
 593         __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf);
 594
 595         struct sk_buff *skb;
 596
 597         if(unlikely(urb->status == -ECONNRESET || urb->status == -ESHUTDOWN))
 598         /* we are killed - set a flag and wake the disconnect handler */
 599         {
 600                 kaweth->end = 1;
 601                 wake_up(&kaweth->term_wait);
 602                 return;
 603         }
 604
 605         if (kaweth->status & KAWETH_STATUS_CLOSING)
 606                 return;
 607
 608         if(urb->status && urb->status != -EREMOTEIO && count != 1) {
 609                 kaweth_err("%s RX status: %d count: %d packet_len: %d",
 610                            net->name,
 611                            urb->status,
 612                            count,
 613                            (int)pkt_len);
 614                 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 615                 return;
 616         }
 617
 618         if(kaweth->net && (count > 2)) {
 619                 if(pkt_len > (count - 2)) {
 620                         kaweth_err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count);
 621                         kaweth_err("Packet len & 2047: %x", pkt_len & 2047);
 622                         kaweth_err("Count 2: %x", count2);
 623                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 624                         return;
 625                 }
 626
 627                 if(!(skb = dev_alloc_skb(pkt_len+2))) {
 628                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 629                         return;
 630                 }
 631
 632                 skb_reserve(skb, 2);    /* Align IP on 16 byte boundaries */
 633
 634                 skb->dev = net;
 635
 636                 eth_copy_and_sum(skb, kaweth->rx_buf + 2, pkt_len, 0);
 637
 638                 skb_put(skb, pkt_len);
 639
 640                 skb->protocol = eth_type_trans(skb, net);
 641
 642                 netif_rx(skb);
 643
 644                 kaweth->stats.rx_packets++;
 645                 kaweth->stats.rx_bytes += pkt_len;
 646         }
 647
 648         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 649 }
 650
 651 /****************************************************************
 652  *     kaweth_open
 653  ****************************************************************/
 654 static int kaweth_open(struct net_device *net)
 655 {
 656         struct kaweth_device *kaweth = netdev_priv(net);
 657         int res;
 658
 659         kaweth_dbg("Opening network device.");
 660
 661         res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL);
 662         if (res)
 663                 return -EIO;
 664
 665         usb_fill_int_urb(
 666                 kaweth->irq_urb,
 667                 kaweth->dev,
 668                 usb_rcvintpipe(kaweth->dev, 3),
 669                 kaweth->intbuffer,
 670                 INTBUFFERSIZE,
 671                 int_callback,
 672                 kaweth,
 673                 250); /* overriding the descriptor */
 674         kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle;
 675         kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 676
 677         res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL);
 678         if (res) {
 679                 usb_kill_urb(kaweth->rx_urb);
 680                 return -EIO;
 681         }
 682
 683         netif_start_queue(net);
 684
 685         kaweth_async_set_rx_mode(kaweth);
 686         return 0;
 687 }
 688
 689 /****************************************************************
 690  *     kaweth_close
 691  ****************************************************************/
 692 static int kaweth_close(struct net_device *net)
 693 {
 694         struct kaweth_device *kaweth = netdev_priv(net);
 695
 696         netif_stop_queue(net);
 697
 698         kaweth->status |= KAWETH_STATUS_CLOSING;
 699
 700         usb_kill_urb(kaweth->irq_urb);
 701         usb_kill_urb(kaweth->rx_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, struct pt_regs *regs)
 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         if (kaweth->removed) {
 754         /* our device is undergoing disconnection - we bail out */
 755                 spin_unlock(&kaweth->device_lock);
 756                 dev_kfree_skb_irq(skb);
 757                 return 0;
 758         }
 759
 760         kaweth_async_set_rx_mode(kaweth);
 761         netif_stop_queue(net);
 762
 763         /* We now decide whether we can put our special header into the sk_buff */
 764         if (skb_cloned(skb) || skb_headroom(skb) < 2) {
 765                 /* no such luck - we make our own */
 766                 struct sk_buff *copied_skb;
 767                 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC);
 768                 dev_kfree_skb_irq(skb);
 769                 skb = copied_skb;
 770                 if (!copied_skb) {
 771                         kaweth->stats.tx_errors++;
 772                         netif_start_queue(net);
 773                         spin_unlock(&kaweth->device_lock);
 774                         return 0;
 775                 }
 776         }
 777
 778         private_header = (__le16 *)__skb_push(skb, 2);
 779         *private_header = cpu_to_le16(skb->len-2);
 780         kaweth->tx_skb = skb;
 781
 782         usb_fill_bulk_urb(kaweth->tx_urb,
 783                       kaweth->dev,
 784                       usb_sndbulkpipe(kaweth->dev, 2),
 785                       private_header,
 786                       skb->len,
 787                       kaweth_usb_transmit_complete,
 788                       kaweth);
 789         kaweth->end = 0;
 790         kaweth->tx_urb->transfer_flags |= URB_ASYNC_UNLINK;
 791
 792         if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
 793         {
 794                 kaweth_warn("kaweth failed tx_urb %d", res);
 795                 kaweth->stats.tx_errors++;
 796
 797                 netif_start_queue(net);
 798                 dev_kfree_skb_irq(skb);
 799         }
 800         else
 801         {
 802                 kaweth->stats.tx_packets++;
 803                 kaweth->stats.tx_bytes += skb->len;
 804                 net->trans_start = jiffies;
 805         }
 806
 807         spin_unlock(&kaweth->device_lock);
 808
 809         return 0;
 810 }
 811
 812 /****************************************************************
 813  *     kaweth_set_rx_mode
 814  ****************************************************************/
 815 static void kaweth_set_rx_mode(struct net_device *net)
 816 {
 817         struct kaweth_device *kaweth = netdev_priv(net);
 818
 819         __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
 820                                      KAWETH_PACKET_FILTER_BROADCAST |
 821                                      KAWETH_PACKET_FILTER_MULTICAST;
 822
 823         kaweth_dbg("Setting Rx mode to %d", packet_filter_bitmap);
 824
 825         netif_stop_queue(net);
 826
 827         if (net->flags & IFF_PROMISC) {
 828                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
 829         }
 830         else if ((net->mc_count) || (net->flags & IFF_ALLMULTI)) {
 831                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
 832         }
 833
 834         kaweth->packet_filter_bitmap = packet_filter_bitmap;
 835         netif_wake_queue(net);
 836 }
 837
 838 /****************************************************************
 839  *     kaweth_async_set_rx_mode
 840  ****************************************************************/
 841 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
 842 {
 843         __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
 844         kaweth->packet_filter_bitmap = 0;
 845         if (packet_filter_bitmap == 0)
 846                 return;
 847
 848         {
 849         int result;
 850         result = kaweth_control(kaweth,
 851                                 usb_sndctrlpipe(kaweth->dev, 0),
 852                                 KAWETH_COMMAND_SET_PACKET_FILTER,
 853                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 854                                 packet_filter_bitmap,
 855                                 0,
 856                                 (void *)&kaweth->scratch,
 857                                 0,
 858                                 KAWETH_CONTROL_TIMEOUT);
 859
 860         if(result < 0) {
 861                 kaweth_err("Failed to set Rx mode: %d", result);
 862         }
 863         else {
 864                 kaweth_dbg("Set Rx mode to %d", packet_filter_bitmap);
 865         }
 866         }
 867 }
 868
 869 /****************************************************************
 870  *     kaweth_netdev_stats
 871  ****************************************************************/
 872 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev)
 873 {
 874         struct kaweth_device *kaweth = netdev_priv(dev);
 875         return &kaweth->stats;
 876 }
 877
 878 /****************************************************************
 879  *     kaweth_tx_timeout
 880  ****************************************************************/
 881 static void kaweth_tx_timeout(struct net_device *net)
 882 {
 883         struct kaweth_device *kaweth = netdev_priv(net);
 884
 885         kaweth_warn("%s: Tx timed out. Resetting.", net->name);
 886         kaweth->stats.tx_errors++;
 887         net->trans_start = jiffies;
 888
 889         usb_unlink_urb(kaweth->tx_urb);
 890 }
 891
 892 /****************************************************************
 893  *     kaweth_probe
 894  ****************************************************************/
 895 static int kaweth_probe(
 896                 struct usb_interface *intf,
 897                 const struct usb_device_id *id      /* from id_table */
 898         )
 899 {
 900         struct usb_device *dev = interface_to_usbdev(intf);
 901         struct kaweth_device *kaweth;
 902         struct net_device *netdev;
 903         const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 904         int result = 0;
 905
 906         kaweth_dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x",
 907                  dev->devnum,
 908                  le16_to_cpu(dev->descriptor.idVendor),
 909                  le16_to_cpu(dev->descriptor.idProduct),
 910                  le16_to_cpu(dev->descriptor.bcdDevice));
 911
 912         kaweth_dbg("Device at %p", dev);
 913
 914         kaweth_dbg("Descriptor length: %x type: %x",
 915                  (int)dev->descriptor.bLength,
 916                  (int)dev->descriptor.bDescriptorType);
 917
 918         netdev = alloc_etherdev(sizeof(*kaweth));
 919         if (!netdev)
 920                 return -ENOMEM;
 921
 922         kaweth = netdev_priv(netdev);
 923         kaweth->dev = dev;
 924         kaweth->net = netdev;
 925
 926         spin_lock_init(&kaweth->device_lock);
 927         init_waitqueue_head(&kaweth->term_wait);
 928
 929         kaweth_dbg("Resetting.");
 930
 931         kaweth_reset(kaweth);
 932
 933         /*
 934          * If high byte of bcdDevice is nonzero, firmware is already
 935          * downloaded. Don't try to do it again, or we'll hang the device.
 936          */
 937
 938         if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) {
 939                 kaweth_info("Firmware present in device.");
 940         } else {
 941                 /* Download the firmware */
 942                 kaweth_info("Downloading firmware...");
 943                 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
 944                 if ((result = kaweth_download_firmware(kaweth,
 945                                                       kaweth_new_code,
 946                                                       len_kaweth_new_code,
 947                                                       100,
 948                                                       2)) < 0) {
 949                         kaweth_err("Error downloading firmware (%d)", result);
 950                         goto err_fw;
 951                 }
 952
 953                 if ((result = kaweth_download_firmware(kaweth,
 954                                                       kaweth_new_code_fix,
 955                                                       len_kaweth_new_code_fix,
 956                                                       100,
 957                                                       3)) < 0) {
 958                         kaweth_err("Error downloading firmware fix (%d)", result);
 959                         goto err_fw;
 960                 }
 961
 962                 if ((result = kaweth_download_firmware(kaweth,
 963                                                       kaweth_trigger_code,
 964                                                       len_kaweth_trigger_code,
 965                                                       126,
 966                                                       2)) < 0) {
 967                         kaweth_err("Error downloading trigger code (%d)", result);
 968                         goto err_fw;
 969
 970                 }
 971
 972                 if ((result = kaweth_download_firmware(kaweth,
 973                                                       kaweth_trigger_code_fix,
 974                                                       len_kaweth_trigger_code_fix,
 975                                                       126,
 976                                                       3)) < 0) {
 977                         kaweth_err("Error downloading trigger code fix (%d)", result);
 978                         goto err_fw;
 979                 }
 980
 981
 982                 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
 983                         kaweth_err("Error triggering firmware (%d)", result);
 984                         goto err_fw;
 985                 }
 986
 987                 /* Device will now disappear for a moment...  */
 988                 kaweth_info("Firmware loaded.  I'll be back...");
 989 err_fw:
 990                 free_page((unsigned long)kaweth->firmware_buf);
 991                 free_netdev(netdev);
 992                 return -EIO;
 993         }
 994
 995         result = kaweth_read_configuration(kaweth);
 996
 997         if(result < 0) {
 998                 kaweth_err("Error reading configuration (%d), no net device created", result);
 999                 goto err_free_netdev;
1000         }
1001
1002         kaweth_info("Statistics collection: %x", kaweth->configuration.statistics_mask);
1003         kaweth_info("Multicast filter limit: %x", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
1004         kaweth_info("MTU: %d", le16_to_cpu(kaweth->configuration.segment_size));
1005         kaweth_info("Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
1006                  (int)kaweth->configuration.hw_addr[0],
1007                  (int)kaweth->configuration.hw_addr[1],
1008                  (int)kaweth->configuration.hw_addr[2],
1009                  (int)kaweth->configuration.hw_addr[3],
1010                  (int)kaweth->configuration.hw_addr[4],
1011                  (int)kaweth->configuration.hw_addr[5]);
1012
1013         if(!memcmp(&kaweth->configuration.hw_addr,
1014                    &bcast_addr,
1015                    sizeof(bcast_addr))) {
1016                 kaweth_err("Firmware not functioning properly, no net device created");
1017                 goto err_free_netdev;
1018         }
1019
1020         if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
1021                 kaweth_dbg("Error setting URB size");
1022                 goto err_free_netdev;
1023         }
1024
1025         if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
1026                 kaweth_err("Error setting SOFS wait");
1027                 goto err_free_netdev;
1028         }
1029
1030         result = kaweth_set_receive_filter(kaweth,
1031                                            KAWETH_PACKET_FILTER_DIRECTED |
1032                                            KAWETH_PACKET_FILTER_BROADCAST |
1033                                            KAWETH_PACKET_FILTER_MULTICAST);
1034
1035         if(result < 0) {
1036                 kaweth_err("Error setting receive filter");
1037                 goto err_free_netdev;
1038         }
1039
1040         kaweth_dbg("Initializing net device.");
1041
1042         kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1043         if (!kaweth->tx_urb)
1044                 goto err_free_netdev;
1045         kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1046         if (!kaweth->rx_urb)
1047                 goto err_only_tx;
1048         kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1049         if (!kaweth->irq_urb)
1050                 goto err_tx_and_rx;
1051
1052         kaweth->intbuffer = usb_buffer_alloc(   kaweth->dev,
1053                                                 INTBUFFERSIZE,
1054                                                 GFP_KERNEL,
1055                                                 &kaweth->intbufferhandle);
1056         if (!kaweth->intbuffer)
1057                 goto err_tx_and_rx_and_irq;
1058         kaweth->rx_buf = usb_buffer_alloc(      kaweth->dev,
1059                                                 KAWETH_BUF_SIZE,
1060                                                 GFP_KERNEL,
1061                                                 &kaweth->rxbufferhandle);
1062         if (!kaweth->rx_buf)
1063                 goto err_all_but_rxbuf;
1064
1065         memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr));
1066         memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr,
1067                sizeof(kaweth->configuration.hw_addr));
1068
1069         netdev->open = kaweth_open;
1070         netdev->stop = kaweth_close;
1071
1072         netdev->watchdog_timeo = KAWETH_TX_TIMEOUT;
1073         netdev->tx_timeout = kaweth_tx_timeout;
1074
1075         netdev->hard_start_xmit = kaweth_start_xmit;
1076         netdev->set_multicast_list = kaweth_set_rx_mode;
1077         netdev->get_stats = kaweth_netdev_stats;
1078         netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size);
1079         SET_ETHTOOL_OPS(netdev, &ops);
1080
1081         /* kaweth is zeroed as part of alloc_netdev */
1082
1083         INIT_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl, (void *)kaweth);
1084
1085         SET_MODULE_OWNER(netdev);
1086
1087         usb_set_intfdata(intf, kaweth);
1088
1089 #if 0
1090 // dma_supported() is deeply broken on almost all architectures
1091         if (dma_supported (&intf->dev, 0xffffffffffffffffULL))
1092                 kaweth->net->features |= NETIF_F_HIGHDMA;
1093 #endif
1094
1095         SET_NETDEV_DEV(netdev, &intf->dev);
1096         if (register_netdev(netdev) != 0) {
1097                 kaweth_err("Error registering netdev.");
1098                 goto err_intfdata;
1099         }
1100
1101         kaweth_info("kaweth interface created at %s", kaweth->net->name);
1102
1103         kaweth_dbg("Kaweth probe returning.");
1104
1105         return 0;
1106
1107 err_intfdata:
1108         usb_set_intfdata(intf, NULL);
1109         usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1110 err_all_but_rxbuf:
1111         usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1112 err_tx_and_rx_and_irq:
1113         usb_free_urb(kaweth->irq_urb);
1114 err_tx_and_rx:
1115         usb_free_urb(kaweth->rx_urb);
1116 err_only_tx:
1117         usb_free_urb(kaweth->tx_urb);
1118 err_free_netdev:
1119         free_netdev(netdev);
1120
1121         return -EIO;
1122 }
1123
1124 /****************************************************************
1125  *     kaweth_disconnect
1126  ****************************************************************/
1127 static void kaweth_disconnect(struct usb_interface *intf)
1128 {
1129         struct kaweth_device *kaweth = usb_get_intfdata(intf);
1130         struct net_device *netdev;
1131
1132         kaweth_info("Unregistering");
1133
1134         usb_set_intfdata(intf, NULL);
1135         if (!kaweth) {
1136                 kaweth_warn("unregistering non-existant device");
1137                 return;
1138         }
1139         netdev = kaweth->net;
1140         kaweth->removed = 1;
1141         usb_kill_urb(kaweth->irq_urb);
1142         usb_kill_urb(kaweth->rx_urb);
1143         usb_kill_urb(kaweth->tx_urb);
1144
1145         kaweth_dbg("Unregistering net device");
1146         unregister_netdev(netdev);
1147
1148         usb_free_urb(kaweth->rx_urb);
1149         usb_free_urb(kaweth->tx_urb);
1150         usb_free_urb(kaweth->irq_urb);
1151
1152         usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1153         usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1154
1155         free_netdev(netdev);
1156 }
1157
1158
1159 // FIXME this completion stuff is a modified clone of
1160 // an OLD version of some stuff in usb.c ...
1161 struct usb_api_data {
1162         wait_queue_head_t wqh;
1163         int done;
1164 };
1165
1166 /*-------------------------------------------------------------------*
1167  * completion handler for compatibility wrappers (sync control/bulk) *
1168  *-------------------------------------------------------------------*/
1169 static void usb_api_blocking_completion(struct urb *urb, struct pt_regs *regs)
1170 {
1171         struct usb_api_data *awd = (struct usb_api_data *)urb->context;
1172
1173         awd->done=1;
1174         wake_up(&awd->wqh);
1175 }
1176
1177 /*-------------------------------------------------------------------*
1178  *                         COMPATIBILITY STUFF                       *
1179  *-------------------------------------------------------------------*/
1180
1181 // Starts urb and waits for completion or timeout
1182 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
1183 {
1184         struct usb_api_data awd;
1185         int status;
1186
1187         init_waitqueue_head(&awd.wqh);
1188         awd.done = 0;
1189
1190         urb->context = &awd;
1191         status = usb_submit_urb(urb, GFP_NOIO);
1192         if (status) {
1193                 // something went wrong
1194                 usb_free_urb(urb);
1195                 return status;
1196         }
1197
1198         if (!wait_event_timeout(awd.wqh, awd.done, timeout)) {
1199                 // timeout
1200                 kaweth_warn("usb_control/bulk_msg: timeout");
1201                 usb_kill_urb(urb);  // remove urb safely
1202                 status = -ETIMEDOUT;
1203         }
1204         else {
1205                 status = urb->status;
1206         }
1207
1208         if (actual_length) {
1209                 *actual_length = urb->actual_length;
1210         }
1211
1212         usb_free_urb(urb);
1213         return status;
1214 }
1215
1216 /*-------------------------------------------------------------------*/
1217 // returns status (negative) or length (positive)
1218 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
1219                                        unsigned int pipe,
1220                                        struct usb_ctrlrequest *cmd, void *data,
1221                                        int len, int timeout)
1222 {
1223         struct urb *urb;
1224         int retv;
1225         int length;
1226
1227         urb = usb_alloc_urb(0, GFP_NOIO);
1228         if (!urb)
1229                 return -ENOMEM;
1230
1231         usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data,
1232                          len, usb_api_blocking_completion, NULL);
1233
1234         retv = usb_start_wait_urb(urb, timeout, &length);
1235         if (retv < 0) {
1236                 return retv;
1237         }
1238         else {
1239                 return length;
1240         }
1241 }
1242
1243
1244 /****************************************************************
1245  *     kaweth_init
1246  ****************************************************************/
1247 static int __init kaweth_init(void)
1248 {
1249         kaweth_dbg("Driver loading");
1250         return usb_register(&kaweth_driver);
1251 }
1252
1253 /****************************************************************
1254  *     kaweth_exit
1255  ****************************************************************/
1256 static void __exit kaweth_exit(void)
1257 {
1258         usb_deregister(&kaweth_driver);
1259 }
1260
1261 module_init(kaweth_init);
1262 module_exit(kaweth_exit);
1263
1264
1265
1266
1267
1268
1269
1270
1271