drivers/net/usb/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, see <http://www.gnu.org/licenses/>.
  29  *
  30  ****************************************************************/
  31
  32 /* TODO:
  33  * Develop test procedures for USB net interfaces
  34  * Run test procedures
  35  * Fix bugs from previous two steps
  36  * Snoop other OSs for any tricks we're not doing
  37  * Reduce arbitrary timeouts
  38  * Smart multicast support
  39  * Temporary MAC change support
  40  * Tunable SOFs parameter - ioctl()?
  41  * Ethernet stats collection
  42  * Code formatting improvements
  43  */
  44
  45 #include <linux/module.h>
  46 #include <linux/slab.h>
  47 #include <linux/string.h>
  48 #include <linux/delay.h>
  49 #include <linux/netdevice.h>
  50 #include <linux/etherdevice.h>
  51 #include <linux/usb.h>
  52 #include <linux/types.h>
  53 #include <linux/ethtool.h>
  54 #include <linux/dma-mapping.h>
  55 #include <linux/wait.h>
  56 #include <linux/firmware.h>
  57 #include <linux/uaccess.h>
  58 #include <asm/byteorder.h>
  59
  60 #undef DEBUG
  61
  62 #define KAWETH_MTU                      1514
  63 #define KAWETH_BUF_SIZE                 1664
  64 #define KAWETH_TX_TIMEOUT               (5 * HZ)
  65 #define KAWETH_SCRATCH_SIZE             32
  66 #define KAWETH_FIRMWARE_BUF_SIZE        4096
  67 #define KAWETH_CONTROL_TIMEOUT          (30000)
  68
  69 #define KAWETH_STATUS_BROKEN            0x0000001
  70 #define KAWETH_STATUS_CLOSING           0x0000002
  71 #define KAWETH_STATUS_SUSPENDING        0x0000004
  72
  73 #define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING)
  74
  75 #define KAWETH_PACKET_FILTER_PROMISCUOUS        0x01
  76 #define KAWETH_PACKET_FILTER_ALL_MULTICAST      0x02
  77 #define KAWETH_PACKET_FILTER_DIRECTED           0x04
  78 #define KAWETH_PACKET_FILTER_BROADCAST          0x08
  79 #define KAWETH_PACKET_FILTER_MULTICAST          0x10
  80
  81 /* Table 7 */
  82 #define KAWETH_COMMAND_GET_ETHERNET_DESC        0x00
  83 #define KAWETH_COMMAND_MULTICAST_FILTERS        0x01
  84 #define KAWETH_COMMAND_SET_PACKET_FILTER        0x02
  85 #define KAWETH_COMMAND_STATISTICS               0x03
  86 #define KAWETH_COMMAND_SET_TEMP_MAC             0x06
  87 #define KAWETH_COMMAND_GET_TEMP_MAC             0x07
  88 #define KAWETH_COMMAND_SET_URB_SIZE             0x08
  89 #define KAWETH_COMMAND_SET_SOFS_WAIT            0x09
  90 #define KAWETH_COMMAND_SCAN                     0xFF
  91
  92 #define KAWETH_SOFS_TO_WAIT                     0x05
  93
  94 #define INTBUFFERSIZE                           4
  95
  96 #define STATE_OFFSET                            0
  97 #define STATE_MASK                              0x40
  98 #define STATE_SHIFT                             5
  99
 100 #define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED)
 101
 102
 103 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>");
 104 MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver");
 105 MODULE_LICENSE("GPL");
 106 /*(DEBLOBBED)*/
 107
 108 static const char driver_name[] = "kaweth";
 109
 110 static int kaweth_probe(
 111                 struct usb_interface *intf,
 112                 const struct usb_device_id *id  /* from id_table */
 113         );
 114 static void kaweth_disconnect(struct usb_interface *intf);
 115 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
 116                                        unsigned int pipe,
 117                                        struct usb_ctrlrequest *cmd, void *data,
 118                                        int len, int timeout);
 119 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message);
 120 static int kaweth_resume(struct usb_interface *intf);
 121
 122 /****************************************************************
 123  *     usb_device_id
 124  ****************************************************************/
 125 static const struct usb_device_id usb_klsi_table[] = {
 126         { USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */
 127         { USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */
 128         { USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */
 129         { USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */
 130         { USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */
 131         { USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */
 132         { USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */
 133         { USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */
 134         { USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */
 135         { USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */
 136         { USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */
 137         { USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */
 138         { USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */
 139         { USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */
 140         { USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */
 141         { USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */
 142         { USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */
 143         { USB_DEVICE(0x07c9, 0xb010) }, /* Allied Telesyn AT-USB10 USB Ethernet Adapter */
 144         { USB_DEVICE(0x0846, 0x1001) }, /* NetGear EA-101 */
 145         { USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */
 146         { USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */
 147         { USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */
 148         { USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */
 149         { USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */
 150         { USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */
 151         { USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */
 152         { USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */
 153         { USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */
 154         { USB_DEVICE(0x1485, 0x0001) }, /* Silicom U2E */
 155         { USB_DEVICE(0x1485, 0x0002) }, /* Psion Dacom Gold Port Ethernet */
 156         { USB_DEVICE(0x1645, 0x0005) }, /* Entrega E45 */
 157         { USB_DEVICE(0x1645, 0x0008) }, /* Entrega USB Ethernet Adapter */
 158         { USB_DEVICE(0x1645, 0x8005) }, /* PortGear Ethernet Adapter */
 159         { USB_DEVICE(0x1668, 0x0323) }, /* Actiontec USB Ethernet */
 160         { USB_DEVICE(0x2001, 0x4000) }, /* D-link DSB-650C */
 161         {} /* Null terminator */
 162 };
 163
 164 MODULE_DEVICE_TABLE (usb, usb_klsi_table);
 165
 166 /****************************************************************
 167  *     kaweth_driver
 168  ****************************************************************/
 169 static struct usb_driver kaweth_driver = {
 170         .name =         driver_name,
 171         .probe =        kaweth_probe,
 172         .disconnect =   kaweth_disconnect,
 173         .suspend =      kaweth_suspend,
 174         .resume =       kaweth_resume,
 175         .id_table =     usb_klsi_table,
 176         .supports_autosuspend = 1,
 177         .disable_hub_initiated_lpm = 1,
 178 };
 179
 180 typedef __u8 eth_addr_t[6];
 181
 182 /****************************************************************
 183  *     usb_eth_dev
 184  ****************************************************************/
 185 struct usb_eth_dev {
 186         char *name;
 187         __u16 vendor;
 188         __u16 device;
 189         void *pdata;
 190 };
 191
 192 /****************************************************************
 193  *     kaweth_ethernet_configuration
 194  *     Refer Table 8
 195  ****************************************************************/
 196 struct kaweth_ethernet_configuration
 197 {
 198         __u8 size;
 199         __u8 reserved1;
 200         __u8 reserved2;
 201         eth_addr_t hw_addr;
 202         __u32 statistics_mask;
 203         __le16 segment_size;
 204         __u16 max_multicast_filters;
 205         __u8 reserved3;
 206 } __packed;
 207
 208 /****************************************************************
 209  *     kaweth_device
 210  ****************************************************************/
 211 struct kaweth_device
 212 {
 213         spinlock_t device_lock;
 214
 215         __u32 status;
 216         int end;
 217         int suspend_lowmem_rx;
 218         int suspend_lowmem_ctrl;
 219         int linkstate;
 220         int opened;
 221         struct delayed_work lowmem_work;
 222
 223         struct usb_device *dev;
 224         struct usb_interface *intf;
 225         struct net_device *net;
 226         wait_queue_head_t term_wait;
 227
 228         struct urb *rx_urb;
 229         struct urb *tx_urb;
 230         struct urb *irq_urb;
 231
 232         dma_addr_t intbufferhandle;
 233         __u8 *intbuffer;
 234         dma_addr_t rxbufferhandle;
 235         __u8 *rx_buf;
 236
 237
 238         struct sk_buff *tx_skb;
 239
 240         __u8 *firmware_buf;
 241         __u8 scratch[KAWETH_SCRATCH_SIZE];
 242         __u16 packet_filter_bitmap;
 243
 244         struct kaweth_ethernet_configuration configuration;
 245 };
 246
 247 /****************************************************************
 248  *     kaweth_control
 249  ****************************************************************/
 250 static int kaweth_control(struct kaweth_device *kaweth,
 251                           unsigned int pipe,
 252                           __u8 request,
 253                           __u8 requesttype,
 254                           __u16 value,
 255                           __u16 index,
 256                           void *data,
 257                           __u16 size,
 258                           int timeout)
 259 {
 260         struct usb_ctrlrequest *dr;
 261         int retval;
 262
 263         if(in_interrupt()) {
 264                 netdev_dbg(kaweth->net, "in_interrupt()\n");
 265                 return -EBUSY;
 266         }
 267
 268         dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
 269         if (!dr)
 270                 return -ENOMEM;
 271
 272         dr->bRequestType = requesttype;
 273         dr->bRequest = request;
 274         dr->wValue = cpu_to_le16(value);
 275         dr->wIndex = cpu_to_le16(index);
 276         dr->wLength = cpu_to_le16(size);
 277
 278         retval = kaweth_internal_control_msg(kaweth->dev,
 279                                              pipe,
 280                                              dr,
 281                                              data,
 282                                              size,
 283                                              timeout);
 284
 285         kfree(dr);
 286         return retval;
 287 }
 288
 289 /****************************************************************
 290  *     kaweth_read_configuration
 291  ****************************************************************/
 292 static int kaweth_read_configuration(struct kaweth_device *kaweth)
 293 {
 294         int retval;
 295
 296         retval = kaweth_control(kaweth,
 297                                 usb_rcvctrlpipe(kaweth->dev, 0),
 298                                 KAWETH_COMMAND_GET_ETHERNET_DESC,
 299                                 USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE,
 300                                 0,
 301                                 0,
 302                                 (void *)&kaweth->configuration,
 303                                 sizeof(kaweth->configuration),
 304                                 KAWETH_CONTROL_TIMEOUT);
 305
 306         return retval;
 307 }
 308
 309 /****************************************************************
 310  *     kaweth_set_urb_size
 311  ****************************************************************/
 312 static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size)
 313 {
 314         int retval;
 315
 316         netdev_dbg(kaweth->net, "Setting URB size to %d\n", (unsigned)urb_size);
 317
 318         retval = kaweth_control(kaweth,
 319                                 usb_sndctrlpipe(kaweth->dev, 0),
 320                                 KAWETH_COMMAND_SET_URB_SIZE,
 321                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 322                                 urb_size,
 323                                 0,
 324                                 (void *)&kaweth->scratch,
 325                                 0,
 326                                 KAWETH_CONTROL_TIMEOUT);
 327
 328         return retval;
 329 }
 330
 331 /****************************************************************
 332  *     kaweth_set_sofs_wait
 333  ****************************************************************/
 334 static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait)
 335 {
 336         int retval;
 337
 338         netdev_dbg(kaweth->net, "Set SOFS wait to %d\n", (unsigned)sofs_wait);
 339
 340         retval = kaweth_control(kaweth,
 341                                 usb_sndctrlpipe(kaweth->dev, 0),
 342                                 KAWETH_COMMAND_SET_SOFS_WAIT,
 343                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 344                                 sofs_wait,
 345                                 0,
 346                                 (void *)&kaweth->scratch,
 347                                 0,
 348                                 KAWETH_CONTROL_TIMEOUT);
 349
 350         return retval;
 351 }
 352
 353 /****************************************************************
 354  *     kaweth_set_receive_filter
 355  ****************************************************************/
 356 static int kaweth_set_receive_filter(struct kaweth_device *kaweth,
 357                                      __u16 receive_filter)
 358 {
 359         int retval;
 360
 361         netdev_dbg(kaweth->net, "Set receive filter to %d\n",
 362                    (unsigned)receive_filter);
 363
 364         retval = kaweth_control(kaweth,
 365                                 usb_sndctrlpipe(kaweth->dev, 0),
 366                                 KAWETH_COMMAND_SET_PACKET_FILTER,
 367                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 368                                 receive_filter,
 369                                 0,
 370                                 (void *)&kaweth->scratch,
 371                                 0,
 372                                 KAWETH_CONTROL_TIMEOUT);
 373
 374         return retval;
 375 }
 376
 377 /****************************************************************
 378  *     kaweth_download_firmware
 379  ****************************************************************/
 380 static int kaweth_download_firmware(struct kaweth_device *kaweth,
 381                                     const char *fwname,
 382                                     __u8 interrupt,
 383                                     __u8 type)
 384 {
 385         const struct firmware *fw;
 386         int data_len;
 387         int ret;
 388
 389         ret = reject_firmware(&fw, fwname, &kaweth->dev->dev);
 390         if (ret) {
 391                 dev_err(&kaweth->intf->dev, "Firmware request failed\n");
 392                 return ret;
 393         }
 394
 395         if (fw->size > KAWETH_FIRMWARE_BUF_SIZE) {
 396                 dev_err(&kaweth->intf->dev, "Firmware too big: %zu\n",
 397                         fw->size);
 398                 release_firmware(fw);
 399                 return -ENOSPC;
 400         }
 401         data_len = fw->size;
 402         memcpy(kaweth->firmware_buf, fw->data, fw->size);
 403
 404         release_firmware(fw);
 405
 406         kaweth->firmware_buf[2] = (data_len & 0xFF) - 7;
 407         kaweth->firmware_buf[3] = data_len >> 8;
 408         kaweth->firmware_buf[4] = type;
 409         kaweth->firmware_buf[5] = interrupt;
 410
 411         netdev_dbg(kaweth->net, "High: %i, Low:%i\n", kaweth->firmware_buf[3],
 412                    kaweth->firmware_buf[2]);
 413
 414         netdev_dbg(kaweth->net,
 415                    "Downloading firmware at %p to kaweth device at %p\n",
 416                    kaweth->firmware_buf, kaweth);
 417         netdev_dbg(kaweth->net, "Firmware length: %d\n", data_len);
 418
 419         return kaweth_control(kaweth,
 420                               usb_sndctrlpipe(kaweth->dev, 0),
 421                               KAWETH_COMMAND_SCAN,
 422                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 423                               0,
 424                               0,
 425                               (void *)kaweth->firmware_buf,
 426                               data_len,
 427                               KAWETH_CONTROL_TIMEOUT);
 428 }
 429
 430 /****************************************************************
 431  *     kaweth_trigger_firmware
 432  ****************************************************************/
 433 static int kaweth_trigger_firmware(struct kaweth_device *kaweth,
 434                                    __u8 interrupt)
 435 {
 436         kaweth->firmware_buf[0] = 0xB6;
 437         kaweth->firmware_buf[1] = 0xC3;
 438         kaweth->firmware_buf[2] = 0x01;
 439         kaweth->firmware_buf[3] = 0x00;
 440         kaweth->firmware_buf[4] = 0x06;
 441         kaweth->firmware_buf[5] = interrupt;
 442         kaweth->firmware_buf[6] = 0x00;
 443         kaweth->firmware_buf[7] = 0x00;
 444
 445         return kaweth_control(kaweth,
 446                               usb_sndctrlpipe(kaweth->dev, 0),
 447                               KAWETH_COMMAND_SCAN,
 448                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 449                               0,
 450                               0,
 451                               (void *)kaweth->firmware_buf,
 452                               8,
 453                               KAWETH_CONTROL_TIMEOUT);
 454 }
 455
 456 /****************************************************************
 457  *     kaweth_reset
 458  ****************************************************************/
 459 static int kaweth_reset(struct kaweth_device *kaweth)
 460 {
 461         int result;
 462
 463         result = usb_reset_configuration(kaweth->dev);
 464         mdelay(10);
 465
 466         netdev_dbg(kaweth->net, "kaweth_reset() returns %d.\n", result);
 467
 468         return result;
 469 }
 470
 471 static void kaweth_usb_receive(struct urb *);
 472 static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t);
 473
 474 /****************************************************************
 475         int_callback
 476 *****************************************************************/
 477
 478 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf)
 479 {
 480         int status;
 481
 482         status = usb_submit_urb (kaweth->irq_urb, mf);
 483         if (unlikely(status == -ENOMEM)) {
 484                 kaweth->suspend_lowmem_ctrl = 1;
 485                 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
 486         } else {
 487                 kaweth->suspend_lowmem_ctrl = 0;
 488         }
 489
 490         if (status)
 491                 dev_err(&kaweth->intf->dev,
 492                         "can't resubmit intr, %s-%s, status %d\n",
 493                         kaweth->dev->bus->bus_name,
 494                         kaweth->dev->devpath, status);
 495 }
 496
 497 static void int_callback(struct urb *u)
 498 {
 499         struct kaweth_device *kaweth = u->context;
 500         int act_state;
 501         int status = u->status;
 502
 503         switch (status) {
 504         case 0:                 /* success */
 505                 break;
 506         case -ECONNRESET:       /* unlink */
 507         case -ENOENT:
 508         case -ESHUTDOWN:
 509                 return;
 510         /* -EPIPE:  should clear the halt */
 511         default:                /* error */
 512                 goto resubmit;
 513         }
 514
 515         /* we check the link state to report changes */
 516         if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) {
 517                 if (act_state)
 518                         netif_carrier_on(kaweth->net);
 519                 else
 520                         netif_carrier_off(kaweth->net);
 521
 522                 kaweth->linkstate = act_state;
 523         }
 524 resubmit:
 525         kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC);
 526 }
 527
 528 static void kaweth_resubmit_tl(struct work_struct *work)
 529 {
 530         struct kaweth_device *kaweth =
 531                 container_of(work, struct kaweth_device, lowmem_work.work);
 532
 533         if (IS_BLOCKED(kaweth->status))
 534                 return;
 535
 536         if (kaweth->suspend_lowmem_rx)
 537                 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
 538
 539         if (kaweth->suspend_lowmem_ctrl)
 540                 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
 541 }
 542
 543
 544 /****************************************************************
 545  *     kaweth_resubmit_rx_urb
 546  ****************************************************************/
 547 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth,
 548                                                 gfp_t mem_flags)
 549 {
 550         int result;
 551
 552         usb_fill_bulk_urb(kaweth->rx_urb,
 553                       kaweth->dev,
 554                       usb_rcvbulkpipe(kaweth->dev, 1),
 555                       kaweth->rx_buf,
 556                       KAWETH_BUF_SIZE,
 557                       kaweth_usb_receive,
 558                       kaweth);
 559         kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 560         kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle;
 561
 562         if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) {
 563                 if (result == -ENOMEM) {
 564                         kaweth->suspend_lowmem_rx = 1;
 565                         schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
 566                 }
 567                 dev_err(&kaweth->intf->dev, "resubmitting rx_urb %d failed\n",
 568                         result);
 569         } else {
 570                 kaweth->suspend_lowmem_rx = 0;
 571         }
 572
 573         return result;
 574 }
 575
 576 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth);
 577
 578 /****************************************************************
 579  *     kaweth_usb_receive
 580  ****************************************************************/
 581 static void kaweth_usb_receive(struct urb *urb)
 582 {
 583         struct device *dev = &urb->dev->dev;
 584         struct kaweth_device *kaweth = urb->context;
 585         struct net_device *net = kaweth->net;
 586         int status = urb->status;
 587
 588         int count = urb->actual_length;
 589         int count2 = urb->transfer_buffer_length;
 590
 591         __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf);
 592
 593         struct sk_buff *skb;
 594
 595         if (unlikely(status == -EPIPE)) {
 596                 net->stats.rx_errors++;
 597                 kaweth->end = 1;
 598                 wake_up(&kaweth->term_wait);
 599                 dev_dbg(dev, "Status was -EPIPE.\n");
 600                 return;
 601         }
 602         if (unlikely(status == -ECONNRESET || status == -ESHUTDOWN)) {
 603                 /* we are killed - set a flag and wake the disconnect handler */
 604                 kaweth->end = 1;
 605                 wake_up(&kaweth->term_wait);
 606                 dev_dbg(dev, "Status was -ECONNRESET or -ESHUTDOWN.\n");
 607                 return;
 608         }
 609         if (unlikely(status == -EPROTO || status == -ETIME ||
 610                      status == -EILSEQ)) {
 611                 net->stats.rx_errors++;
 612                 dev_dbg(dev, "Status was -EPROTO, -ETIME, or -EILSEQ.\n");
 613                 return;
 614         }
 615         if (unlikely(status == -EOVERFLOW)) {
 616                 net->stats.rx_errors++;
 617                 dev_dbg(dev, "Status was -EOVERFLOW.\n");
 618         }
 619         spin_lock(&kaweth->device_lock);
 620         if (IS_BLOCKED(kaweth->status)) {
 621                 spin_unlock(&kaweth->device_lock);
 622                 return;
 623         }
 624         spin_unlock(&kaweth->device_lock);
 625
 626         if(status && status != -EREMOTEIO && count != 1) {
 627                 dev_err(&kaweth->intf->dev,
 628                         "%s RX status: %d count: %d packet_len: %d\n",
 629                         net->name, status, count, (int)pkt_len);
 630                 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 631                 return;
 632         }
 633
 634         if(kaweth->net && (count > 2)) {
 635                 if(pkt_len > (count - 2)) {
 636                         dev_err(&kaweth->intf->dev,
 637                                 "Packet length too long for USB frame (pkt_len: %x, count: %x)\n",
 638                                 pkt_len, count);
 639                         dev_err(&kaweth->intf->dev, "Packet len & 2047: %x\n",
 640                                 pkt_len & 2047);
 641                         dev_err(&kaweth->intf->dev, "Count 2: %x\n", count2);
 642                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 643                         return;
 644                 }
 645
 646                 if(!(skb = dev_alloc_skb(pkt_len+2))) {
 647                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 648                         return;
 649                 }
 650
 651                 skb_reserve(skb, 2);    /* Align IP on 16 byte boundaries */
 652
 653                 skb_copy_to_linear_data(skb, kaweth->rx_buf + 2, pkt_len);
 654
 655                 skb_put(skb, pkt_len);
 656
 657                 skb->protocol = eth_type_trans(skb, net);
 658
 659                 netif_rx(skb);
 660
 661                 net->stats.rx_packets++;
 662                 net->stats.rx_bytes += pkt_len;
 663         }
 664
 665         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 666 }
 667
 668 /****************************************************************
 669  *     kaweth_open
 670  ****************************************************************/
 671 static int kaweth_open(struct net_device *net)
 672 {
 673         struct kaweth_device *kaweth = netdev_priv(net);
 674         int res;
 675
 676         res = usb_autopm_get_interface(kaweth->intf);
 677         if (res) {
 678                 dev_err(&kaweth->intf->dev, "Interface cannot be resumed.\n");
 679                 return -EIO;
 680         }
 681         res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL);
 682         if (res)
 683                 goto err_out;
 684
 685         usb_fill_int_urb(
 686                 kaweth->irq_urb,
 687                 kaweth->dev,
 688                 usb_rcvintpipe(kaweth->dev, 3),
 689                 kaweth->intbuffer,
 690                 INTBUFFERSIZE,
 691                 int_callback,
 692                 kaweth,
 693                 250); /* overriding the descriptor */
 694         kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle;
 695         kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 696
 697         res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL);
 698         if (res) {
 699                 usb_kill_urb(kaweth->rx_urb);
 700                 goto err_out;
 701         }
 702         kaweth->opened = 1;
 703
 704         netif_start_queue(net);
 705
 706         kaweth_async_set_rx_mode(kaweth);
 707         return 0;
 708
 709 err_out:
 710         usb_autopm_put_interface(kaweth->intf);
 711         return -EIO;
 712 }
 713
 714 /****************************************************************
 715  *     kaweth_kill_urbs
 716  ****************************************************************/
 717 static void kaweth_kill_urbs(struct kaweth_device *kaweth)
 718 {
 719         usb_kill_urb(kaweth->irq_urb);
 720         usb_kill_urb(kaweth->rx_urb);
 721         usb_kill_urb(kaweth->tx_urb);
 722
 723         cancel_delayed_work_sync(&kaweth->lowmem_work);
 724
 725         /* a scheduled work may have resubmitted,
 726            we hit them again */
 727         usb_kill_urb(kaweth->irq_urb);
 728         usb_kill_urb(kaweth->rx_urb);
 729 }
 730
 731 /****************************************************************
 732  *     kaweth_close
 733  ****************************************************************/
 734 static int kaweth_close(struct net_device *net)
 735 {
 736         struct kaweth_device *kaweth = netdev_priv(net);
 737
 738         netif_stop_queue(net);
 739         kaweth->opened = 0;
 740
 741         kaweth->status |= KAWETH_STATUS_CLOSING;
 742
 743         kaweth_kill_urbs(kaweth);
 744
 745         kaweth->status &= ~KAWETH_STATUS_CLOSING;
 746
 747         usb_autopm_put_interface(kaweth->intf);
 748
 749         return 0;
 750 }
 751
 752 static u32 kaweth_get_link(struct net_device *dev)
 753 {
 754         struct kaweth_device *kaweth = netdev_priv(dev);
 755
 756         return kaweth->linkstate;
 757 }
 758
 759 static const struct ethtool_ops ops = {
 760         .get_link       = kaweth_get_link
 761 };
 762
 763 /****************************************************************
 764  *     kaweth_usb_transmit_complete
 765  ****************************************************************/
 766 static void kaweth_usb_transmit_complete(struct urb *urb)
 767 {
 768         struct kaweth_device *kaweth = urb->context;
 769         struct sk_buff *skb = kaweth->tx_skb;
 770         int status = urb->status;
 771
 772         if (unlikely(status != 0))
 773                 if (status != -ENOENT)
 774                         dev_dbg(&urb->dev->dev, "%s: TX status %d.\n",
 775                                 kaweth->net->name, status);
 776
 777         netif_wake_queue(kaweth->net);
 778         dev_kfree_skb_irq(skb);
 779 }
 780
 781 /****************************************************************
 782  *     kaweth_start_xmit
 783  ****************************************************************/
 784 static netdev_tx_t kaweth_start_xmit(struct sk_buff *skb,
 785                                            struct net_device *net)
 786 {
 787         struct kaweth_device *kaweth = netdev_priv(net);
 788         __le16 *private_header;
 789
 790         int res;
 791
 792         spin_lock_irq(&kaweth->device_lock);
 793
 794         kaweth_async_set_rx_mode(kaweth);
 795         netif_stop_queue(net);
 796         if (IS_BLOCKED(kaweth->status)) {
 797                 goto skip;
 798         }
 799
 800         /* We now decide whether we can put our special header into the sk_buff */
 801         if (skb_cow_head(skb, 2)) {
 802                 net->stats.tx_errors++;
 803                 netif_start_queue(net);
 804                 spin_unlock_irq(&kaweth->device_lock);
 805                 dev_kfree_skb_any(skb);
 806                 return NETDEV_TX_OK;
 807         }
 808
 809         private_header = __skb_push(skb, 2);
 810         *private_header = cpu_to_le16(skb->len-2);
 811         kaweth->tx_skb = skb;
 812
 813         usb_fill_bulk_urb(kaweth->tx_urb,
 814                       kaweth->dev,
 815                       usb_sndbulkpipe(kaweth->dev, 2),
 816                       private_header,
 817                       skb->len,
 818                       kaweth_usb_transmit_complete,
 819                       kaweth);
 820         kaweth->end = 0;
 821
 822         if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
 823         {
 824                 dev_warn(&net->dev, "kaweth failed tx_urb %d\n", res);
 825 skip:
 826                 net->stats.tx_errors++;
 827
 828                 netif_start_queue(net);
 829                 dev_kfree_skb_irq(skb);
 830         }
 831         else
 832         {
 833                 net->stats.tx_packets++;
 834                 net->stats.tx_bytes += skb->len;
 835         }
 836
 837         spin_unlock_irq(&kaweth->device_lock);
 838
 839         return NETDEV_TX_OK;
 840 }
 841
 842 /****************************************************************
 843  *     kaweth_set_rx_mode
 844  ****************************************************************/
 845 static void kaweth_set_rx_mode(struct net_device *net)
 846 {
 847         struct kaweth_device *kaweth = netdev_priv(net);
 848
 849         __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
 850                                      KAWETH_PACKET_FILTER_BROADCAST |
 851                                      KAWETH_PACKET_FILTER_MULTICAST;
 852
 853         netdev_dbg(net, "Setting Rx mode to %d\n", packet_filter_bitmap);
 854
 855         netif_stop_queue(net);
 856
 857         if (net->flags & IFF_PROMISC) {
 858                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
 859         }
 860         else if (!netdev_mc_empty(net) || (net->flags & IFF_ALLMULTI)) {
 861                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
 862         }
 863
 864         kaweth->packet_filter_bitmap = packet_filter_bitmap;
 865         netif_wake_queue(net);
 866 }
 867
 868 /****************************************************************
 869  *     kaweth_async_set_rx_mode
 870  ****************************************************************/
 871 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
 872 {
 873         int result;
 874         __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
 875
 876         kaweth->packet_filter_bitmap = 0;
 877         if (packet_filter_bitmap == 0)
 878                 return;
 879
 880         if (in_interrupt())
 881                 return;
 882
 883         result = kaweth_control(kaweth,
 884                                 usb_sndctrlpipe(kaweth->dev, 0),
 885                                 KAWETH_COMMAND_SET_PACKET_FILTER,
 886                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 887                                 packet_filter_bitmap,
 888                                 0,
 889                                 (void *)&kaweth->scratch,
 890                                 0,
 891                                 KAWETH_CONTROL_TIMEOUT);
 892
 893         if(result < 0) {
 894                 dev_err(&kaweth->intf->dev, "Failed to set Rx mode: %d\n",
 895                         result);
 896         }
 897         else {
 898                 netdev_dbg(kaweth->net, "Set Rx mode to %d\n",
 899                            packet_filter_bitmap);
 900         }
 901 }
 902
 903 /****************************************************************
 904  *     kaweth_tx_timeout
 905  ****************************************************************/
 906 static void kaweth_tx_timeout(struct net_device *net)
 907 {
 908         struct kaweth_device *kaweth = netdev_priv(net);
 909
 910         dev_warn(&net->dev, "%s: Tx timed out. Resetting.\n", net->name);
 911         net->stats.tx_errors++;
 912         netif_trans_update(net);
 913
 914         usb_unlink_urb(kaweth->tx_urb);
 915 }
 916
 917 /****************************************************************
 918  *     kaweth_suspend
 919  ****************************************************************/
 920 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message)
 921 {
 922         struct kaweth_device *kaweth = usb_get_intfdata(intf);
 923         unsigned long flags;
 924
 925         spin_lock_irqsave(&kaweth->device_lock, flags);
 926         kaweth->status |= KAWETH_STATUS_SUSPENDING;
 927         spin_unlock_irqrestore(&kaweth->device_lock, flags);
 928
 929         kaweth_kill_urbs(kaweth);
 930         return 0;
 931 }
 932
 933 /****************************************************************
 934  *     kaweth_resume
 935  ****************************************************************/
 936 static int kaweth_resume(struct usb_interface *intf)
 937 {
 938         struct kaweth_device *kaweth = usb_get_intfdata(intf);
 939         unsigned long flags;
 940
 941         spin_lock_irqsave(&kaweth->device_lock, flags);
 942         kaweth->status &= ~KAWETH_STATUS_SUSPENDING;
 943         spin_unlock_irqrestore(&kaweth->device_lock, flags);
 944
 945         if (!kaweth->opened)
 946                 return 0;
 947         kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
 948         kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
 949
 950         return 0;
 951 }
 952
 953 /****************************************************************
 954  *     kaweth_probe
 955  ****************************************************************/
 956
 957
 958 static const struct net_device_ops kaweth_netdev_ops = {
 959         .ndo_open =                     kaweth_open,
 960         .ndo_stop =                     kaweth_close,
 961         .ndo_start_xmit =               kaweth_start_xmit,
 962         .ndo_tx_timeout =               kaweth_tx_timeout,
 963         .ndo_set_rx_mode =              kaweth_set_rx_mode,
 964         .ndo_set_mac_address =          eth_mac_addr,
 965         .ndo_validate_addr =            eth_validate_addr,
 966 };
 967
 968 static int kaweth_probe(
 969                 struct usb_interface *intf,
 970                 const struct usb_device_id *id      /* from id_table */
 971         )
 972 {
 973         struct device *dev = &intf->dev;
 974         struct usb_device *udev = interface_to_usbdev(intf);
 975         struct kaweth_device *kaweth;
 976         struct net_device *netdev;
 977         const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 978         int result = 0;
 979         int rv = -EIO;
 980
 981         dev_dbg(dev,
 982                 "Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x\n",
 983                 udev->devnum, le16_to_cpu(udev->descriptor.idVendor),
 984                 le16_to_cpu(udev->descriptor.idProduct),
 985                 le16_to_cpu(udev->descriptor.bcdDevice));
 986
 987         dev_dbg(dev, "Device at %p\n", udev);
 988
 989         dev_dbg(dev, "Descriptor length: %x type: %x\n",
 990                 (int)udev->descriptor.bLength,
 991                 (int)udev->descriptor.bDescriptorType);
 992
 993         netdev = alloc_etherdev(sizeof(*kaweth));
 994         if (!netdev)
 995                 return -ENOMEM;
 996
 997         kaweth = netdev_priv(netdev);
 998         kaweth->dev = udev;
 999         kaweth->net = netdev;
1000         kaweth->intf = intf;
1001
1002         spin_lock_init(&kaweth->device_lock);
1003         init_waitqueue_head(&kaweth->term_wait);
1004
1005         dev_dbg(dev, "Resetting.\n");
1006
1007         kaweth_reset(kaweth);
1008
1009         /*
1010          * If high byte of bcdDevice is nonzero, firmware is already
1011          * downloaded. Don't try to do it again, or we'll hang the device.
1012          */
1013
1014         if (le16_to_cpu(udev->descriptor.bcdDevice) >> 8) {
1015                 dev_info(dev, "Firmware present in device.\n");
1016         } else {
1017                 /* Download the firmware */
1018                 dev_info(dev, "Downloading firmware...\n");
1019                 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
1020                 if (!kaweth->firmware_buf) {
1021                         rv = -ENOMEM;
1022                         goto err_free_netdev;
1023                 }
1024                 if ((result = kaweth_download_firmware(kaweth,
1025                                                       "/*(DEBLOBBED)*/",
1026                                                       100,
1027                                                       2)) < 0) {
1028                         dev_err(dev, "Error downloading firmware (%d)\n",
1029                                 result);
1030                         goto err_fw;
1031                 }
1032
1033                 if ((result = kaweth_download_firmware(kaweth,
1034                                                       "/*(DEBLOBBED)*/",
1035                                                       100,
1036                                                       3)) < 0) {
1037                         dev_err(dev, "Error downloading firmware fix (%d)\n",
1038                                 result);
1039                         goto err_fw;
1040                 }
1041
1042                 if ((result = kaweth_download_firmware(kaweth,
1043                                                       "/*(DEBLOBBED)*/",
1044                                                       126,
1045                                                       2)) < 0) {
1046                         dev_err(dev, "Error downloading trigger code (%d)\n",
1047                                 result);
1048                         goto err_fw;
1049
1050                 }
1051
1052                 if ((result = kaweth_download_firmware(kaweth,
1053                                                       "/*(DEBLOBBED)*/",
1054                                                       126,
1055                                                       3)) < 0) {
1056                         dev_err(dev, "Error downloading trigger code fix (%d)\n", result);
1057                         goto err_fw;
1058                 }
1059
1060
1061                 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
1062                         dev_err(dev, "Error triggering firmware (%d)\n", result);
1063                         goto err_fw;
1064                 }
1065
1066                 /* Device will now disappear for a moment...  */
1067                 dev_info(dev, "Firmware loaded.  I'll be back...\n");
1068 err_fw:
1069                 free_page((unsigned long)kaweth->firmware_buf);
1070                 free_netdev(netdev);
1071                 return -EIO;
1072         }
1073
1074         result = kaweth_read_configuration(kaweth);
1075
1076         if(result < 0) {
1077                 dev_err(dev, "Error reading configuration (%d), no net device created\n", result);
1078                 goto err_free_netdev;
1079         }
1080
1081         dev_info(dev, "Statistics collection: %x\n", kaweth->configuration.statistics_mask);
1082         dev_info(dev, "Multicast filter limit: %x\n", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
1083         dev_info(dev, "MTU: %d\n", le16_to_cpu(kaweth->configuration.segment_size));
1084         dev_info(dev, "Read MAC address %pM\n", kaweth->configuration.hw_addr);
1085
1086         if(!memcmp(&kaweth->configuration.hw_addr,
1087                    &bcast_addr,
1088                    sizeof(bcast_addr))) {
1089                 dev_err(dev, "Firmware not functioning properly, no net device created\n");
1090                 goto err_free_netdev;
1091         }
1092
1093         if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
1094                 dev_dbg(dev, "Error setting URB size\n");
1095                 goto err_free_netdev;
1096         }
1097
1098         if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
1099                 dev_err(dev, "Error setting SOFS wait\n");
1100                 goto err_free_netdev;
1101         }
1102
1103         result = kaweth_set_receive_filter(kaweth,
1104                                            KAWETH_PACKET_FILTER_DIRECTED |
1105                                            KAWETH_PACKET_FILTER_BROADCAST |
1106                                            KAWETH_PACKET_FILTER_MULTICAST);
1107
1108         if(result < 0) {
1109                 dev_err(dev, "Error setting receive filter\n");
1110                 goto err_free_netdev;
1111         }
1112
1113         dev_dbg(dev, "Initializing net device.\n");
1114
1115         kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1116         if (!kaweth->tx_urb)
1117                 goto err_free_netdev;
1118         kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1119         if (!kaweth->rx_urb)
1120                 goto err_only_tx;
1121         kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1122         if (!kaweth->irq_urb)
1123                 goto err_tx_and_rx;
1124
1125         kaweth->intbuffer = usb_alloc_coherent( kaweth->dev,
1126                                                 INTBUFFERSIZE,
1127                                                 GFP_KERNEL,
1128                                                 &kaweth->intbufferhandle);
1129         if (!kaweth->intbuffer)
1130                 goto err_tx_and_rx_and_irq;
1131         kaweth->rx_buf = usb_alloc_coherent(    kaweth->dev,
1132                                                 KAWETH_BUF_SIZE,
1133                                                 GFP_KERNEL,
1134                                                 &kaweth->rxbufferhandle);
1135         if (!kaweth->rx_buf)
1136                 goto err_all_but_rxbuf;
1137
1138         memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr));
1139         memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr,
1140                sizeof(kaweth->configuration.hw_addr));
1141
1142         netdev->netdev_ops = &kaweth_netdev_ops;
1143         netdev->watchdog_timeo = KAWETH_TX_TIMEOUT;
1144         netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size);
1145         netdev->ethtool_ops = &ops;
1146
1147         /* kaweth is zeroed as part of alloc_netdev */
1148         INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl);
1149         usb_set_intfdata(intf, kaweth);
1150
1151         SET_NETDEV_DEV(netdev, dev);
1152         if (register_netdev(netdev) != 0) {
1153                 dev_err(dev, "Error registering netdev.\n");
1154                 goto err_intfdata;
1155         }
1156
1157         dev_info(dev, "kaweth interface created at %s\n",
1158                  kaweth->net->name);
1159
1160         return 0;
1161
1162 err_intfdata:
1163         usb_set_intfdata(intf, NULL);
1164         usb_free_coherent(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1165 err_all_but_rxbuf:
1166         usb_free_coherent(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1167 err_tx_and_rx_and_irq:
1168         usb_free_urb(kaweth->irq_urb);
1169 err_tx_and_rx:
1170         usb_free_urb(kaweth->rx_urb);
1171 err_only_tx:
1172         usb_free_urb(kaweth->tx_urb);
1173 err_free_netdev:
1174         free_netdev(netdev);
1175
1176         return rv;
1177 }
1178
1179 /****************************************************************
1180  *     kaweth_disconnect
1181  ****************************************************************/
1182 static void kaweth_disconnect(struct usb_interface *intf)
1183 {
1184         struct kaweth_device *kaweth = usb_get_intfdata(intf);
1185         struct net_device *netdev;
1186
1187         usb_set_intfdata(intf, NULL);
1188         if (!kaweth) {
1189                 dev_warn(&intf->dev, "unregistering non-existent device\n");
1190                 return;
1191         }
1192         netdev = kaweth->net;
1193
1194         netdev_dbg(kaweth->net, "Unregistering net device\n");
1195         unregister_netdev(netdev);
1196
1197         usb_free_urb(kaweth->rx_urb);
1198         usb_free_urb(kaweth->tx_urb);
1199         usb_free_urb(kaweth->irq_urb);
1200
1201         usb_free_coherent(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1202         usb_free_coherent(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1203
1204         free_netdev(netdev);
1205 }
1206
1207
1208 // FIXME this completion stuff is a modified clone of
1209 // an OLD version of some stuff in usb.c ...
1210 struct usb_api_data {
1211         wait_queue_head_t wqh;
1212         int done;
1213 };
1214
1215 /*-------------------------------------------------------------------*
1216  * completion handler for compatibility wrappers (sync control/bulk) *
1217  *-------------------------------------------------------------------*/
1218 static void usb_api_blocking_completion(struct urb *urb)
1219 {
1220         struct usb_api_data *awd = (struct usb_api_data *)urb->context;
1221
1222         awd->done=1;
1223         wake_up(&awd->wqh);
1224 }
1225
1226 /*-------------------------------------------------------------------*
1227  *                         COMPATIBILITY STUFF                       *
1228  *-------------------------------------------------------------------*/
1229
1230 // Starts urb and waits for completion or timeout
1231 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
1232 {
1233         struct usb_api_data awd;
1234         int status;
1235
1236         init_waitqueue_head(&awd.wqh);
1237         awd.done = 0;
1238
1239         urb->context = &awd;
1240         status = usb_submit_urb(urb, GFP_ATOMIC);
1241         if (status) {
1242                 // something went wrong
1243                 usb_free_urb(urb);
1244                 return status;
1245         }
1246
1247         if (!wait_event_timeout(awd.wqh, awd.done, timeout)) {
1248                 // timeout
1249                 dev_warn(&urb->dev->dev, "usb_control/bulk_msg: timeout\n");
1250                 usb_kill_urb(urb);  // remove urb safely
1251                 status = -ETIMEDOUT;
1252         }
1253         else {
1254                 status = urb->status;
1255         }
1256
1257         if (actual_length) {
1258                 *actual_length = urb->actual_length;
1259         }
1260
1261         usb_free_urb(urb);
1262         return status;
1263 }
1264
1265 /*-------------------------------------------------------------------*/
1266 // returns status (negative) or length (positive)
1267 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
1268                                        unsigned int pipe,
1269                                        struct usb_ctrlrequest *cmd, void *data,
1270                                        int len, int timeout)
1271 {
1272         struct urb *urb;
1273         int retv;
1274         int length = 0; /* shut up GCC */
1275
1276         urb = usb_alloc_urb(0, GFP_ATOMIC);
1277         if (!urb)
1278                 return -ENOMEM;
1279
1280         usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data,
1281                          len, usb_api_blocking_completion, NULL);
1282
1283         retv = usb_start_wait_urb(urb, timeout, &length);
1284         if (retv < 0) {
1285                 return retv;
1286         }
1287         else {
1288                 return length;
1289         }
1290 }
1291
1292 module_usb_driver(kaweth_driver);