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, write to the Free Software Foundation,
  29  *     Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  30  *
  31  ****************************************************************/
  32
  33 /* TODO:
  34  * Develop test procedures for USB net interfaces
  35  * Run test procedures
  36  * Fix bugs from previous two steps
  37  * Snoop other OSs for any tricks we're not doing
  38  * Reduce arbitrary timeouts
  39  * Smart multicast support
  40  * Temporary MAC change support
  41  * Tunable SOFs parameter - ioctl()?
  42  * Ethernet stats collection
  43  * Code formatting improvements
  44  */
  45
  46 #include <linux/module.h>
  47 #include <linux/slab.h>
  48 #include <linux/string.h>
  49 #include <linux/init.h>
  50 #include <linux/delay.h>
  51 #include <linux/netdevice.h>
  52 #include <linux/etherdevice.h>
  53 #include <linux/usb.h>
  54 #include <linux/types.h>
  55 #include <linux/ethtool.h>
  56 #include <linux/dma-mapping.h>
  57 #include <linux/wait.h>
  58 #include <linux/firmware.h>
  59 #include <asm/uaccess.h>
  60 #include <asm/byteorder.h>
  61
  62 #undef DEBUG
  63
  64 #define KAWETH_MTU                      1514
  65 #define KAWETH_BUF_SIZE                 1664
  66 #define KAWETH_TX_TIMEOUT               (5 * HZ)
  67 #define KAWETH_SCRATCH_SIZE             32
  68 #define KAWETH_FIRMWARE_BUF_SIZE        4096
  69 #define KAWETH_CONTROL_TIMEOUT          (30000)
  70
  71 #define KAWETH_STATUS_BROKEN            0x0000001
  72 #define KAWETH_STATUS_CLOSING           0x0000002
  73 #define KAWETH_STATUS_SUSPENDING        0x0000004
  74
  75 #define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING)
  76
  77 #define KAWETH_PACKET_FILTER_PROMISCUOUS        0x01
  78 #define KAWETH_PACKET_FILTER_ALL_MULTICAST      0x02
  79 #define KAWETH_PACKET_FILTER_DIRECTED           0x04
  80 #define KAWETH_PACKET_FILTER_BROADCAST          0x08
  81 #define KAWETH_PACKET_FILTER_MULTICAST          0x10
  82
  83 /* Table 7 */
  84 #define KAWETH_COMMAND_GET_ETHERNET_DESC        0x00
  85 #define KAWETH_COMMAND_MULTICAST_FILTERS        0x01
  86 #define KAWETH_COMMAND_SET_PACKET_FILTER        0x02
  87 #define KAWETH_COMMAND_STATISTICS               0x03
  88 #define KAWETH_COMMAND_SET_TEMP_MAC             0x06
  89 #define KAWETH_COMMAND_GET_TEMP_MAC             0x07
  90 #define KAWETH_COMMAND_SET_URB_SIZE             0x08
  91 #define KAWETH_COMMAND_SET_SOFS_WAIT            0x09
  92 #define KAWETH_COMMAND_SCAN                     0xFF
  93
  94 #define KAWETH_SOFS_TO_WAIT                     0x05
  95
  96 #define INTBUFFERSIZE                           4
  97
  98 #define STATE_OFFSET                            0
  99 #define STATE_MASK                              0x40
 100 #define STATE_SHIFT                             5
 101
 102 #define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED)
 103
 104
 105 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>");
 106 MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver");
 107 MODULE_LICENSE("GPL");
 108 MODULE_FIRMWARE("kaweth/new_code.bin");
 109 MODULE_FIRMWARE("kaweth/new_code_fix.bin");
 110 MODULE_FIRMWARE("kaweth/trigger_code.bin");
 111 MODULE_FIRMWARE("kaweth/trigger_code_fix.bin");
 112
 113 static const char driver_name[] = "kaweth";
 114
 115 static int kaweth_probe(
 116                 struct usb_interface *intf,
 117                 const struct usb_device_id *id  /* from id_table */
 118         );
 119 static void kaweth_disconnect(struct usb_interface *intf);
 120 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
 121                                        unsigned int pipe,
 122                                        struct usb_ctrlrequest *cmd, void *data,
 123                                        int len, int timeout);
 124 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message);
 125 static int kaweth_resume(struct usb_interface *intf);
 126
 127 /****************************************************************
 128  *     usb_device_id
 129  ****************************************************************/
 130 static struct usb_device_id usb_klsi_table[] = {
 131         { USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */
 132         { USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */
 133         { USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */
 134         { USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */
 135         { USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */
 136         { USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */
 137         { USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */
 138         { USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */
 139         { USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */
 140         { USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */
 141         { USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */
 142         { USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */
 143         { USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */
 144         { USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */
 145         { USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */
 146         { USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */
 147         { USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */
 148         { USB_DEVICE(0x07c9, 0xb010) }, /* Allied Telesyn AT-USB10 USB Ethernet Adapter */
 149         { USB_DEVICE(0x0846, 0x1001) }, /* NetGear EA-101 */
 150         { USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */
 151         { USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */
 152         { USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */
 153         { USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */
 154         { USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */
 155         { USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */
 156         { USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */
 157         { USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */
 158         { USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */
 159         { USB_DEVICE(0x1485, 0x0001) }, /* Silicom U2E */
 160         { USB_DEVICE(0x1485, 0x0002) }, /* Psion Dacom Gold Port Ethernet */
 161         { USB_DEVICE(0x1645, 0x0005) }, /* Entrega E45 */
 162         { USB_DEVICE(0x1645, 0x0008) }, /* Entrega USB Ethernet Adapter */
 163         { USB_DEVICE(0x1645, 0x8005) }, /* PortGear Ethernet Adapter */
 164         { USB_DEVICE(0x1668, 0x0323) }, /* Actiontec USB Ethernet */
 165         { USB_DEVICE(0x2001, 0x4000) }, /* D-link DSB-650C */
 166         {} /* Null terminator */
 167 };
 168
 169 MODULE_DEVICE_TABLE (usb, usb_klsi_table);
 170
 171 /****************************************************************
 172  *     kaweth_driver
 173  ****************************************************************/
 174 static struct usb_driver kaweth_driver = {
 175         .name =         driver_name,
 176         .probe =        kaweth_probe,
 177         .disconnect =   kaweth_disconnect,
 178         .suspend =      kaweth_suspend,
 179         .resume =       kaweth_resume,
 180         .id_table =     usb_klsi_table,
 181         .supports_autosuspend = 1,
 182 };
 183
 184 typedef __u8 eth_addr_t[6];
 185
 186 /****************************************************************
 187  *     usb_eth_dev
 188  ****************************************************************/
 189 struct usb_eth_dev {
 190         char *name;
 191         __u16 vendor;
 192         __u16 device;
 193         void *pdata;
 194 };
 195
 196 /****************************************************************
 197  *     kaweth_ethernet_configuration
 198  *     Refer Table 8
 199  ****************************************************************/
 200 struct kaweth_ethernet_configuration
 201 {
 202         __u8 size;
 203         __u8 reserved1;
 204         __u8 reserved2;
 205         eth_addr_t hw_addr;
 206         __u32 statistics_mask;
 207         __le16 segment_size;
 208         __u16 max_multicast_filters;
 209         __u8 reserved3;
 210 } __packed;
 211
 212 /****************************************************************
 213  *     kaweth_device
 214  ****************************************************************/
 215 struct kaweth_device
 216 {
 217         spinlock_t device_lock;
 218
 219         __u32 status;
 220         int end;
 221         int suspend_lowmem_rx;
 222         int suspend_lowmem_ctrl;
 223         int linkstate;
 224         int opened;
 225         struct delayed_work lowmem_work;
 226
 227         struct usb_device *dev;
 228         struct usb_interface *intf;
 229         struct net_device *net;
 230         wait_queue_head_t term_wait;
 231
 232         struct urb *rx_urb;
 233         struct urb *tx_urb;
 234         struct urb *irq_urb;
 235
 236         dma_addr_t intbufferhandle;
 237         __u8 *intbuffer;
 238         dma_addr_t rxbufferhandle;
 239         __u8 *rx_buf;
 240
 241
 242         struct sk_buff *tx_skb;
 243
 244         __u8 *firmware_buf;
 245         __u8 scratch[KAWETH_SCRATCH_SIZE];
 246         __u16 packet_filter_bitmap;
 247
 248         struct kaweth_ethernet_configuration configuration;
 249
 250         struct net_device_stats stats;
 251 };
 252
 253 /****************************************************************
 254  *     kaweth_control
 255  ****************************************************************/
 256 static int kaweth_control(struct kaweth_device *kaweth,
 257                           unsigned int pipe,
 258                           __u8 request,
 259                           __u8 requesttype,
 260                           __u16 value,
 261                           __u16 index,
 262                           void *data,
 263                           __u16 size,
 264                           int timeout)
 265 {
 266         struct usb_ctrlrequest *dr;
 267         int retval;
 268
 269         dbg("kaweth_control()");
 270
 271         if(in_interrupt()) {
 272                 dbg("in_interrupt()");
 273                 return -EBUSY;
 274         }
 275
 276         dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
 277
 278         if (!dr) {
 279                 dbg("kmalloc() failed");
 280                 return -ENOMEM;
 281         }
 282
 283         dr->bRequestType = requesttype;
 284         dr->bRequest = request;
 285         dr->wValue = cpu_to_le16(value);
 286         dr->wIndex = cpu_to_le16(index);
 287         dr->wLength = cpu_to_le16(size);
 288
 289         retval = kaweth_internal_control_msg(kaweth->dev,
 290                                              pipe,
 291                                              dr,
 292                                              data,
 293                                              size,
 294                                              timeout);
 295
 296         kfree(dr);
 297         return retval;
 298 }
 299
 300 /****************************************************************
 301  *     kaweth_read_configuration
 302  ****************************************************************/
 303 static int kaweth_read_configuration(struct kaweth_device *kaweth)
 304 {
 305         int retval;
 306
 307         dbg("Reading kaweth configuration");
 308
 309         retval = kaweth_control(kaweth,
 310                                 usb_rcvctrlpipe(kaweth->dev, 0),
 311                                 KAWETH_COMMAND_GET_ETHERNET_DESC,
 312                                 USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE,
 313                                 0,
 314                                 0,
 315                                 (void *)&kaweth->configuration,
 316                                 sizeof(kaweth->configuration),
 317                                 KAWETH_CONTROL_TIMEOUT);
 318
 319         return retval;
 320 }
 321
 322 /****************************************************************
 323  *     kaweth_set_urb_size
 324  ****************************************************************/
 325 static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size)
 326 {
 327         int retval;
 328
 329         dbg("Setting URB size to %d", (unsigned)urb_size);
 330
 331         retval = kaweth_control(kaweth,
 332                                 usb_sndctrlpipe(kaweth->dev, 0),
 333                                 KAWETH_COMMAND_SET_URB_SIZE,
 334                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 335                                 urb_size,
 336                                 0,
 337                                 (void *)&kaweth->scratch,
 338                                 0,
 339                                 KAWETH_CONTROL_TIMEOUT);
 340
 341         return retval;
 342 }
 343
 344 /****************************************************************
 345  *     kaweth_set_sofs_wait
 346  ****************************************************************/
 347 static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait)
 348 {
 349         int retval;
 350
 351         dbg("Set SOFS wait to %d", (unsigned)sofs_wait);
 352
 353         retval = kaweth_control(kaweth,
 354                                 usb_sndctrlpipe(kaweth->dev, 0),
 355                                 KAWETH_COMMAND_SET_SOFS_WAIT,
 356                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 357                                 sofs_wait,
 358                                 0,
 359                                 (void *)&kaweth->scratch,
 360                                 0,
 361                                 KAWETH_CONTROL_TIMEOUT);
 362
 363         return retval;
 364 }
 365
 366 /****************************************************************
 367  *     kaweth_set_receive_filter
 368  ****************************************************************/
 369 static int kaweth_set_receive_filter(struct kaweth_device *kaweth,
 370                                      __u16 receive_filter)
 371 {
 372         int retval;
 373
 374         dbg("Set receive filter to %d", (unsigned)receive_filter);
 375
 376         retval = kaweth_control(kaweth,
 377                                 usb_sndctrlpipe(kaweth->dev, 0),
 378                                 KAWETH_COMMAND_SET_PACKET_FILTER,
 379                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 380                                 receive_filter,
 381                                 0,
 382                                 (void *)&kaweth->scratch,
 383                                 0,
 384                                 KAWETH_CONTROL_TIMEOUT);
 385
 386         return retval;
 387 }
 388
 389 /****************************************************************
 390  *     kaweth_download_firmware
 391  ****************************************************************/
 392 static int kaweth_download_firmware(struct kaweth_device *kaweth,
 393                                     const char *fwname,
 394                                     __u8 interrupt,
 395                                     __u8 type)
 396 {
 397         const struct firmware *fw;
 398         int data_len;
 399         int ret;
 400
 401         ret = request_firmware(&fw, fwname, &kaweth->dev->dev);
 402         if (ret) {
 403                 err("Firmware request failed\n");
 404                 return ret;
 405         }
 406
 407         if (fw->size > KAWETH_FIRMWARE_BUF_SIZE) {
 408                 err("Firmware too big: %zu", fw->size);
 409                 release_firmware(fw);
 410                 return -ENOSPC;
 411         }
 412         data_len = fw->size;
 413         memcpy(kaweth->firmware_buf, fw->data, fw->size);
 414
 415         release_firmware(fw);
 416
 417         kaweth->firmware_buf[2] = (data_len & 0xFF) - 7;
 418         kaweth->firmware_buf[3] = data_len >> 8;
 419         kaweth->firmware_buf[4] = type;
 420         kaweth->firmware_buf[5] = interrupt;
 421
 422         dbg("High: %i, Low:%i", kaweth->firmware_buf[3],
 423                    kaweth->firmware_buf[2]);
 424
 425         dbg("Downloading firmware at %p to kaweth device at %p",
 426             fw->data, kaweth);
 427         dbg("Firmware length: %d", data_len);
 428
 429         return kaweth_control(kaweth,
 430                               usb_sndctrlpipe(kaweth->dev, 0),
 431                               KAWETH_COMMAND_SCAN,
 432                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 433                               0,
 434                               0,
 435                               (void *)kaweth->firmware_buf,
 436                               data_len,
 437                               KAWETH_CONTROL_TIMEOUT);
 438 }
 439
 440 /****************************************************************
 441  *     kaweth_trigger_firmware
 442  ****************************************************************/
 443 static int kaweth_trigger_firmware(struct kaweth_device *kaweth,
 444                                    __u8 interrupt)
 445 {
 446         kaweth->firmware_buf[0] = 0xB6;
 447         kaweth->firmware_buf[1] = 0xC3;
 448         kaweth->firmware_buf[2] = 0x01;
 449         kaweth->firmware_buf[3] = 0x00;
 450         kaweth->firmware_buf[4] = 0x06;
 451         kaweth->firmware_buf[5] = interrupt;
 452         kaweth->firmware_buf[6] = 0x00;
 453         kaweth->firmware_buf[7] = 0x00;
 454
 455         dbg("Triggering firmware");
 456
 457         return kaweth_control(kaweth,
 458                               usb_sndctrlpipe(kaweth->dev, 0),
 459                               KAWETH_COMMAND_SCAN,
 460                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 461                               0,
 462                               0,
 463                               (void *)kaweth->firmware_buf,
 464                               8,
 465                               KAWETH_CONTROL_TIMEOUT);
 466 }
 467
 468 /****************************************************************
 469  *     kaweth_reset
 470  ****************************************************************/
 471 static int kaweth_reset(struct kaweth_device *kaweth)
 472 {
 473         int result;
 474
 475         dbg("kaweth_reset(%p)", kaweth);
 476         result = usb_reset_configuration(kaweth->dev);
 477         mdelay(10);
 478
 479         dbg("kaweth_reset() returns %d.",result);
 480
 481         return result;
 482 }
 483
 484 static void kaweth_usb_receive(struct urb *);
 485 static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t);
 486
 487 /****************************************************************
 488         int_callback
 489 *****************************************************************/
 490
 491 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf)
 492 {
 493         int status;
 494
 495         status = usb_submit_urb (kaweth->irq_urb, mf);
 496         if (unlikely(status == -ENOMEM)) {
 497                 kaweth->suspend_lowmem_ctrl = 1;
 498                 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
 499         } else {
 500                 kaweth->suspend_lowmem_ctrl = 0;
 501         }
 502
 503         if (status)
 504                 err ("can't resubmit intr, %s-%s, status %d",
 505                                 kaweth->dev->bus->bus_name,
 506                                 kaweth->dev->devpath, status);
 507 }
 508
 509 static void int_callback(struct urb *u)
 510 {
 511         struct kaweth_device *kaweth = u->context;
 512         int act_state;
 513         int status = u->status;
 514
 515         switch (status) {
 516         case 0:                 /* success */
 517                 break;
 518         case -ECONNRESET:       /* unlink */
 519         case -ENOENT:
 520         case -ESHUTDOWN:
 521                 return;
 522         /* -EPIPE:  should clear the halt */
 523         default:                /* error */
 524                 goto resubmit;
 525         }
 526
 527         /* we check the link state to report changes */
 528         if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) {
 529                 if (act_state)
 530                         netif_carrier_on(kaweth->net);
 531                 else
 532                         netif_carrier_off(kaweth->net);
 533
 534                 kaweth->linkstate = act_state;
 535         }
 536 resubmit:
 537         kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC);
 538 }
 539
 540 static void kaweth_resubmit_tl(struct work_struct *work)
 541 {
 542         struct kaweth_device *kaweth =
 543                 container_of(work, struct kaweth_device, lowmem_work.work);
 544
 545         if (IS_BLOCKED(kaweth->status))
 546                 return;
 547
 548         if (kaweth->suspend_lowmem_rx)
 549                 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
 550
 551         if (kaweth->suspend_lowmem_ctrl)
 552                 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
 553 }
 554
 555
 556 /****************************************************************
 557  *     kaweth_resubmit_rx_urb
 558  ****************************************************************/
 559 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth,
 560                                                 gfp_t mem_flags)
 561 {
 562         int result;
 563
 564         usb_fill_bulk_urb(kaweth->rx_urb,
 565                       kaweth->dev,
 566                       usb_rcvbulkpipe(kaweth->dev, 1),
 567                       kaweth->rx_buf,
 568                       KAWETH_BUF_SIZE,
 569                       kaweth_usb_receive,
 570                       kaweth);
 571         kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 572         kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle;
 573
 574         if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) {
 575                 if (result == -ENOMEM) {
 576                         kaweth->suspend_lowmem_rx = 1;
 577                         schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
 578                 }
 579                 err("resubmitting rx_urb %d failed", result);
 580         } else {
 581                 kaweth->suspend_lowmem_rx = 0;
 582         }
 583
 584         return result;
 585 }
 586
 587 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth);
 588
 589 /****************************************************************
 590  *     kaweth_usb_receive
 591  ****************************************************************/
 592 static void kaweth_usb_receive(struct urb *urb)
 593 {
 594         struct kaweth_device *kaweth = urb->context;
 595         struct net_device *net = kaweth->net;
 596         int status = urb->status;
 597
 598         int count = urb->actual_length;
 599         int count2 = urb->transfer_buffer_length;
 600
 601         __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf);
 602
 603         struct sk_buff *skb;
 604
 605         if (unlikely(status == -EPIPE)) {
 606                 kaweth->stats.rx_errors++;
 607                 kaweth->end = 1;
 608                 wake_up(&kaweth->term_wait);
 609                 dbg("Status was -EPIPE.");
 610                 return;
 611         }
 612         if (unlikely(status == -ECONNRESET || status == -ESHUTDOWN)) {
 613                 /* we are killed - set a flag and wake the disconnect handler */
 614                 kaweth->end = 1;
 615                 wake_up(&kaweth->term_wait);
 616                 dbg("Status was -ECONNRESET or -ESHUTDOWN.");
 617                 return;
 618         }
 619         if (unlikely(status == -EPROTO || status == -ETIME ||
 620                      status == -EILSEQ)) {
 621                 kaweth->stats.rx_errors++;
 622                 dbg("Status was -EPROTO, -ETIME, or -EILSEQ.");
 623                 return;
 624         }
 625         if (unlikely(status == -EOVERFLOW)) {
 626                 kaweth->stats.rx_errors++;
 627                 dbg("Status was -EOVERFLOW.");
 628         }
 629         spin_lock(&kaweth->device_lock);
 630         if (IS_BLOCKED(kaweth->status)) {
 631                 spin_unlock(&kaweth->device_lock);
 632                 return;
 633         }
 634         spin_unlock(&kaweth->device_lock);
 635
 636         if(status && status != -EREMOTEIO && count != 1) {
 637                 err("%s RX status: %d count: %d packet_len: %d",
 638                            net->name,
 639                            status,
 640                            count,
 641                            (int)pkt_len);
 642                 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 643                 return;
 644         }
 645
 646         if(kaweth->net && (count > 2)) {
 647                 if(pkt_len > (count - 2)) {
 648                         err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count);
 649                         err("Packet len & 2047: %x", pkt_len & 2047);
 650                         err("Count 2: %x", count2);
 651                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 652                         return;
 653                 }
 654
 655                 if(!(skb = dev_alloc_skb(pkt_len+2))) {
 656                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 657                         return;
 658                 }
 659
 660                 skb_reserve(skb, 2);    /* Align IP on 16 byte boundaries */
 661
 662                 skb_copy_to_linear_data(skb, kaweth->rx_buf + 2, pkt_len);
 663
 664                 skb_put(skb, pkt_len);
 665
 666                 skb->protocol = eth_type_trans(skb, net);
 667
 668                 netif_rx(skb);
 669
 670                 kaweth->stats.rx_packets++;
 671                 kaweth->stats.rx_bytes += pkt_len;
 672         }
 673
 674         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 675 }
 676
 677 /****************************************************************
 678  *     kaweth_open
 679  ****************************************************************/
 680 static int kaweth_open(struct net_device *net)
 681 {
 682         struct kaweth_device *kaweth = netdev_priv(net);
 683         int res;
 684
 685         dbg("Opening network device.");
 686
 687         res = usb_autopm_get_interface(kaweth->intf);
 688         if (res) {
 689                 err("Interface cannot be resumed.");
 690                 return -EIO;
 691         }
 692         res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL);
 693         if (res)
 694                 goto err_out;
 695
 696         usb_fill_int_urb(
 697                 kaweth->irq_urb,
 698                 kaweth->dev,
 699                 usb_rcvintpipe(kaweth->dev, 3),
 700                 kaweth->intbuffer,
 701                 INTBUFFERSIZE,
 702                 int_callback,
 703                 kaweth,
 704                 250); /* overriding the descriptor */
 705         kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle;
 706         kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 707
 708         res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL);
 709         if (res) {
 710                 usb_kill_urb(kaweth->rx_urb);
 711                 goto err_out;
 712         }
 713         kaweth->opened = 1;
 714
 715         netif_start_queue(net);
 716
 717         kaweth_async_set_rx_mode(kaweth);
 718         return 0;
 719
 720 err_out:
 721         usb_autopm_put_interface(kaweth->intf);
 722         return -EIO;
 723 }
 724
 725 /****************************************************************
 726  *     kaweth_kill_urbs
 727  ****************************************************************/
 728 static void kaweth_kill_urbs(struct kaweth_device *kaweth)
 729 {
 730         usb_kill_urb(kaweth->irq_urb);
 731         usb_kill_urb(kaweth->rx_urb);
 732         usb_kill_urb(kaweth->tx_urb);
 733
 734         cancel_delayed_work_sync(&kaweth->lowmem_work);
 735
 736         /* a scheduled work may have resubmitted,
 737            we hit them again */
 738         usb_kill_urb(kaweth->irq_urb);
 739         usb_kill_urb(kaweth->rx_urb);
 740 }
 741
 742 /****************************************************************
 743  *     kaweth_close
 744  ****************************************************************/
 745 static int kaweth_close(struct net_device *net)
 746 {
 747         struct kaweth_device *kaweth = netdev_priv(net);
 748
 749         netif_stop_queue(net);
 750         kaweth->opened = 0;
 751
 752         kaweth->status |= KAWETH_STATUS_CLOSING;
 753
 754         kaweth_kill_urbs(kaweth);
 755
 756         kaweth->status &= ~KAWETH_STATUS_CLOSING;
 757
 758         usb_autopm_put_interface(kaweth->intf);
 759
 760         return 0;
 761 }
 762
 763 static u32 kaweth_get_link(struct net_device *dev)
 764 {
 765         struct kaweth_device *kaweth = netdev_priv(dev);
 766
 767         return kaweth->linkstate;
 768 }
 769
 770 static const struct ethtool_ops ops = {
 771         .get_link       = kaweth_get_link
 772 };
 773
 774 /****************************************************************
 775  *     kaweth_usb_transmit_complete
 776  ****************************************************************/
 777 static void kaweth_usb_transmit_complete(struct urb *urb)
 778 {
 779         struct kaweth_device *kaweth = urb->context;
 780         struct sk_buff *skb = kaweth->tx_skb;
 781         int status = urb->status;
 782
 783         if (unlikely(status != 0))
 784                 if (status != -ENOENT)
 785                         dbg("%s: TX status %d.", kaweth->net->name, status);
 786
 787         netif_wake_queue(kaweth->net);
 788         dev_kfree_skb_irq(skb);
 789 }
 790
 791 /****************************************************************
 792  *     kaweth_start_xmit
 793  ****************************************************************/
 794 static netdev_tx_t kaweth_start_xmit(struct sk_buff *skb,
 795                                            struct net_device *net)
 796 {
 797         struct kaweth_device *kaweth = netdev_priv(net);
 798         __le16 *private_header;
 799
 800         int res;
 801
 802         spin_lock_irq(&kaweth->device_lock);
 803
 804         kaweth_async_set_rx_mode(kaweth);
 805         netif_stop_queue(net);
 806         if (IS_BLOCKED(kaweth->status)) {
 807                 goto skip;
 808         }
 809
 810         /* We now decide whether we can put our special header into the sk_buff */
 811         if (skb_cloned(skb) || skb_headroom(skb) < 2) {
 812                 /* no such luck - we make our own */
 813                 struct sk_buff *copied_skb;
 814                 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC);
 815                 dev_kfree_skb_irq(skb);
 816                 skb = copied_skb;
 817                 if (!copied_skb) {
 818                         kaweth->stats.tx_errors++;
 819                         netif_start_queue(net);
 820                         spin_unlock_irq(&kaweth->device_lock);
 821                         return NETDEV_TX_OK;
 822                 }
 823         }
 824
 825         private_header = (__le16 *)__skb_push(skb, 2);
 826         *private_header = cpu_to_le16(skb->len-2);
 827         kaweth->tx_skb = skb;
 828
 829         usb_fill_bulk_urb(kaweth->tx_urb,
 830                       kaweth->dev,
 831                       usb_sndbulkpipe(kaweth->dev, 2),
 832                       private_header,
 833                       skb->len,
 834                       kaweth_usb_transmit_complete,
 835                       kaweth);
 836         kaweth->end = 0;
 837
 838         if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
 839         {
 840                 dev_warn(&net->dev, "kaweth failed tx_urb %d\n", res);
 841 skip:
 842                 kaweth->stats.tx_errors++;
 843
 844                 netif_start_queue(net);
 845                 dev_kfree_skb_irq(skb);
 846         }
 847         else
 848         {
 849                 kaweth->stats.tx_packets++;
 850                 kaweth->stats.tx_bytes += skb->len;
 851         }
 852
 853         spin_unlock_irq(&kaweth->device_lock);
 854
 855         return NETDEV_TX_OK;
 856 }
 857
 858 /****************************************************************
 859  *     kaweth_set_rx_mode
 860  ****************************************************************/
 861 static void kaweth_set_rx_mode(struct net_device *net)
 862 {
 863         struct kaweth_device *kaweth = netdev_priv(net);
 864
 865         __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
 866                                      KAWETH_PACKET_FILTER_BROADCAST |
 867                                      KAWETH_PACKET_FILTER_MULTICAST;
 868
 869         dbg("Setting Rx mode to %d", packet_filter_bitmap);
 870
 871         netif_stop_queue(net);
 872
 873         if (net->flags & IFF_PROMISC) {
 874                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
 875         }
 876         else if (!netdev_mc_empty(net) || (net->flags & IFF_ALLMULTI)) {
 877                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
 878         }
 879
 880         kaweth->packet_filter_bitmap = packet_filter_bitmap;
 881         netif_wake_queue(net);
 882 }
 883
 884 /****************************************************************
 885  *     kaweth_async_set_rx_mode
 886  ****************************************************************/
 887 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
 888 {
 889         int result;
 890         __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
 891
 892         kaweth->packet_filter_bitmap = 0;
 893         if (packet_filter_bitmap == 0)
 894                 return;
 895
 896         if (in_interrupt())
 897                 return;
 898
 899         result = kaweth_control(kaweth,
 900                                 usb_sndctrlpipe(kaweth->dev, 0),
 901                                 KAWETH_COMMAND_SET_PACKET_FILTER,
 902                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 903                                 packet_filter_bitmap,
 904                                 0,
 905                                 (void *)&kaweth->scratch,
 906                                 0,
 907                                 KAWETH_CONTROL_TIMEOUT);
 908
 909         if(result < 0) {
 910                 err("Failed to set Rx mode: %d", result);
 911         }
 912         else {
 913                 dbg("Set Rx mode to %d", packet_filter_bitmap);
 914         }
 915 }
 916
 917 /****************************************************************
 918  *     kaweth_netdev_stats
 919  ****************************************************************/
 920 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev)
 921 {
 922         struct kaweth_device *kaweth = netdev_priv(dev);
 923         return &kaweth->stats;
 924 }
 925
 926 /****************************************************************
 927  *     kaweth_tx_timeout
 928  ****************************************************************/
 929 static void kaweth_tx_timeout(struct net_device *net)
 930 {
 931         struct kaweth_device *kaweth = netdev_priv(net);
 932
 933         dev_warn(&net->dev, "%s: Tx timed out. Resetting.\n", net->name);
 934         kaweth->stats.tx_errors++;
 935         net->trans_start = jiffies;
 936
 937         usb_unlink_urb(kaweth->tx_urb);
 938 }
 939
 940 /****************************************************************
 941  *     kaweth_suspend
 942  ****************************************************************/
 943 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message)
 944 {
 945         struct kaweth_device *kaweth = usb_get_intfdata(intf);
 946         unsigned long flags;
 947
 948         dbg("Suspending device");
 949         spin_lock_irqsave(&kaweth->device_lock, flags);
 950         kaweth->status |= KAWETH_STATUS_SUSPENDING;
 951         spin_unlock_irqrestore(&kaweth->device_lock, flags);
 952
 953         kaweth_kill_urbs(kaweth);
 954         return 0;
 955 }
 956
 957 /****************************************************************
 958  *     kaweth_resume
 959  ****************************************************************/
 960 static int kaweth_resume(struct usb_interface *intf)
 961 {
 962         struct kaweth_device *kaweth = usb_get_intfdata(intf);
 963         unsigned long flags;
 964
 965         dbg("Resuming device");
 966         spin_lock_irqsave(&kaweth->device_lock, flags);
 967         kaweth->status &= ~KAWETH_STATUS_SUSPENDING;
 968         spin_unlock_irqrestore(&kaweth->device_lock, flags);
 969
 970         if (!kaweth->opened)
 971                 return 0;
 972         kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
 973         kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
 974
 975         return 0;
 976 }
 977
 978 /****************************************************************
 979  *     kaweth_probe
 980  ****************************************************************/
 981
 982
 983 static const struct net_device_ops kaweth_netdev_ops = {
 984         .ndo_open =                     kaweth_open,
 985         .ndo_stop =                     kaweth_close,
 986         .ndo_start_xmit =               kaweth_start_xmit,
 987         .ndo_tx_timeout =               kaweth_tx_timeout,
 988         .ndo_set_rx_mode =              kaweth_set_rx_mode,
 989         .ndo_get_stats =                kaweth_netdev_stats,
 990         .ndo_change_mtu =               eth_change_mtu,
 991         .ndo_set_mac_address =          eth_mac_addr,
 992         .ndo_validate_addr =            eth_validate_addr,
 993 };
 994
 995 static int kaweth_probe(
 996                 struct usb_interface *intf,
 997                 const struct usb_device_id *id      /* from id_table */
 998         )
 999 {
1000         struct usb_device *dev = interface_to_usbdev(intf);
1001         struct kaweth_device *kaweth;
1002         struct net_device *netdev;
1003         const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
1004         int result = 0;
1005
1006         dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x",
1007                  dev->devnum,
1008                  le16_to_cpu(dev->descriptor.idVendor),
1009                  le16_to_cpu(dev->descriptor.idProduct),
1010                  le16_to_cpu(dev->descriptor.bcdDevice));
1011
1012         dbg("Device at %p", dev);
1013
1014         dbg("Descriptor length: %x type: %x",
1015                  (int)dev->descriptor.bLength,
1016                  (int)dev->descriptor.bDescriptorType);
1017
1018         netdev = alloc_etherdev(sizeof(*kaweth));
1019         if (!netdev)
1020                 return -ENOMEM;
1021
1022         kaweth = netdev_priv(netdev);
1023         kaweth->dev = dev;
1024         kaweth->net = netdev;
1025
1026         spin_lock_init(&kaweth->device_lock);
1027         init_waitqueue_head(&kaweth->term_wait);
1028
1029         dbg("Resetting.");
1030
1031         kaweth_reset(kaweth);
1032
1033         /*
1034          * If high byte of bcdDevice is nonzero, firmware is already
1035          * downloaded. Don't try to do it again, or we'll hang the device.
1036          */
1037
1038         if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) {
1039                 dev_info(&intf->dev, "Firmware present in device.\n");
1040         } else {
1041                 /* Download the firmware */
1042                 dev_info(&intf->dev, "Downloading firmware...\n");
1043                 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
1044                 if ((result = kaweth_download_firmware(kaweth,
1045                                                       "kaweth/new_code.bin",
1046                                                       100,
1047                                                       2)) < 0) {
1048                         err("Error downloading firmware (%d)", result);
1049                         goto err_fw;
1050                 }
1051
1052                 if ((result = kaweth_download_firmware(kaweth,
1053                                                       "kaweth/new_code_fix.bin",
1054                                                       100,
1055                                                       3)) < 0) {
1056                         err("Error downloading firmware fix (%d)", result);
1057                         goto err_fw;
1058                 }
1059
1060                 if ((result = kaweth_download_firmware(kaweth,
1061                                                       "kaweth/trigger_code.bin",
1062                                                       126,
1063                                                       2)) < 0) {
1064                         err("Error downloading trigger code (%d)", result);
1065                         goto err_fw;
1066
1067                 }
1068
1069                 if ((result = kaweth_download_firmware(kaweth,
1070                                                       "kaweth/trigger_code_fix.bin",
1071                                                       126,
1072                                                       3)) < 0) {
1073                         err("Error downloading trigger code fix (%d)", result);
1074                         goto err_fw;
1075                 }
1076
1077
1078                 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
1079                         err("Error triggering firmware (%d)", result);
1080                         goto err_fw;
1081                 }
1082
1083                 /* Device will now disappear for a moment...  */
1084                 dev_info(&intf->dev, "Firmware loaded.  I'll be back...\n");
1085 err_fw:
1086                 free_page((unsigned long)kaweth->firmware_buf);
1087                 free_netdev(netdev);
1088                 return -EIO;
1089         }
1090
1091         result = kaweth_read_configuration(kaweth);
1092
1093         if(result < 0) {
1094                 err("Error reading configuration (%d), no net device created", result);
1095                 goto err_free_netdev;
1096         }
1097
1098         dev_info(&intf->dev, "Statistics collection: %x\n", kaweth->configuration.statistics_mask);
1099         dev_info(&intf->dev, "Multicast filter limit: %x\n", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
1100         dev_info(&intf->dev, "MTU: %d\n", le16_to_cpu(kaweth->configuration.segment_size));
1101         dev_info(&intf->dev, "Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x\n",
1102                  (int)kaweth->configuration.hw_addr[0],
1103                  (int)kaweth->configuration.hw_addr[1],
1104                  (int)kaweth->configuration.hw_addr[2],
1105                  (int)kaweth->configuration.hw_addr[3],
1106                  (int)kaweth->configuration.hw_addr[4],
1107                  (int)kaweth->configuration.hw_addr[5]);
1108
1109         if(!memcmp(&kaweth->configuration.hw_addr,
1110                    &bcast_addr,
1111                    sizeof(bcast_addr))) {
1112                 err("Firmware not functioning properly, no net device created");
1113                 goto err_free_netdev;
1114         }
1115
1116         if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
1117                 dbg("Error setting URB size");
1118                 goto err_free_netdev;
1119         }
1120
1121         if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
1122                 err("Error setting SOFS wait");
1123                 goto err_free_netdev;
1124         }
1125
1126         result = kaweth_set_receive_filter(kaweth,
1127                                            KAWETH_PACKET_FILTER_DIRECTED |
1128                                            KAWETH_PACKET_FILTER_BROADCAST |
1129                                            KAWETH_PACKET_FILTER_MULTICAST);
1130
1131         if(result < 0) {
1132                 err("Error setting receive filter");
1133                 goto err_free_netdev;
1134         }
1135
1136         dbg("Initializing net device.");
1137
1138         kaweth->intf = intf;
1139
1140         kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1141         if (!kaweth->tx_urb)
1142                 goto err_free_netdev;
1143         kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1144         if (!kaweth->rx_urb)
1145                 goto err_only_tx;
1146         kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1147         if (!kaweth->irq_urb)
1148                 goto err_tx_and_rx;
1149
1150         kaweth->intbuffer = usb_alloc_coherent( kaweth->dev,
1151                                                 INTBUFFERSIZE,
1152                                                 GFP_KERNEL,
1153                                                 &kaweth->intbufferhandle);
1154         if (!kaweth->intbuffer)
1155                 goto err_tx_and_rx_and_irq;
1156         kaweth->rx_buf = usb_alloc_coherent(    kaweth->dev,
1157                                                 KAWETH_BUF_SIZE,
1158                                                 GFP_KERNEL,
1159                                                 &kaweth->rxbufferhandle);
1160         if (!kaweth->rx_buf)
1161                 goto err_all_but_rxbuf;
1162
1163         memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr));
1164         memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr,
1165                sizeof(kaweth->configuration.hw_addr));
1166
1167         netdev->netdev_ops = &kaweth_netdev_ops;
1168         netdev->watchdog_timeo = KAWETH_TX_TIMEOUT;
1169         netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size);
1170         SET_ETHTOOL_OPS(netdev, &ops);
1171
1172         /* kaweth is zeroed as part of alloc_netdev */
1173         INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl);
1174         usb_set_intfdata(intf, kaweth);
1175
1176 #if 0
1177 // dma_supported() is deeply broken on almost all architectures
1178         if (dma_supported (&intf->dev, 0xffffffffffffffffULL))
1179                 kaweth->net->features |= NETIF_F_HIGHDMA;
1180 #endif
1181
1182         SET_NETDEV_DEV(netdev, &intf->dev);
1183         if (register_netdev(netdev) != 0) {
1184                 err("Error registering netdev.");
1185                 goto err_intfdata;
1186         }
1187
1188         dev_info(&intf->dev, "kaweth interface created at %s\n",
1189                  kaweth->net->name);
1190
1191         dbg("Kaweth probe returning.");
1192
1193         return 0;
1194
1195 err_intfdata:
1196         usb_set_intfdata(intf, NULL);
1197         usb_free_coherent(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1198 err_all_but_rxbuf:
1199         usb_free_coherent(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1200 err_tx_and_rx_and_irq:
1201         usb_free_urb(kaweth->irq_urb);
1202 err_tx_and_rx:
1203         usb_free_urb(kaweth->rx_urb);
1204 err_only_tx:
1205         usb_free_urb(kaweth->tx_urb);
1206 err_free_netdev:
1207         free_netdev(netdev);
1208
1209         return -EIO;
1210 }
1211
1212 /****************************************************************
1213  *     kaweth_disconnect
1214  ****************************************************************/
1215 static void kaweth_disconnect(struct usb_interface *intf)
1216 {
1217         struct kaweth_device *kaweth = usb_get_intfdata(intf);
1218         struct net_device *netdev;
1219
1220         dev_info(&intf->dev, "Unregistering\n");
1221
1222         usb_set_intfdata(intf, NULL);
1223         if (!kaweth) {
1224                 dev_warn(&intf->dev, "unregistering non-existent device\n");
1225                 return;
1226         }
1227         netdev = kaweth->net;
1228
1229         dbg("Unregistering net device");
1230         unregister_netdev(netdev);
1231
1232         usb_free_urb(kaweth->rx_urb);
1233         usb_free_urb(kaweth->tx_urb);
1234         usb_free_urb(kaweth->irq_urb);
1235
1236         usb_free_coherent(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1237         usb_free_coherent(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1238
1239         free_netdev(netdev);
1240 }
1241
1242
1243 // FIXME this completion stuff is a modified clone of
1244 // an OLD version of some stuff in usb.c ...
1245 struct usb_api_data {
1246         wait_queue_head_t wqh;
1247         int done;
1248 };
1249
1250 /*-------------------------------------------------------------------*
1251  * completion handler for compatibility wrappers (sync control/bulk) *
1252  *-------------------------------------------------------------------*/
1253 static void usb_api_blocking_completion(struct urb *urb)
1254 {
1255         struct usb_api_data *awd = (struct usb_api_data *)urb->context;
1256
1257         awd->done=1;
1258         wake_up(&awd->wqh);
1259 }
1260
1261 /*-------------------------------------------------------------------*
1262  *                         COMPATIBILITY STUFF                       *
1263  *-------------------------------------------------------------------*/
1264
1265 // Starts urb and waits for completion or timeout
1266 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
1267 {
1268         struct usb_api_data awd;
1269         int status;
1270
1271         init_waitqueue_head(&awd.wqh);
1272         awd.done = 0;
1273
1274         urb->context = &awd;
1275         status = usb_submit_urb(urb, GFP_NOIO);
1276         if (status) {
1277                 // something went wrong
1278                 usb_free_urb(urb);
1279                 return status;
1280         }
1281
1282         if (!wait_event_timeout(awd.wqh, awd.done, timeout)) {
1283                 // timeout
1284                 dev_warn(&urb->dev->dev, "usb_control/bulk_msg: timeout\n");
1285                 usb_kill_urb(urb);  // remove urb safely
1286                 status = -ETIMEDOUT;
1287         }
1288         else {
1289                 status = urb->status;
1290         }
1291
1292         if (actual_length) {
1293                 *actual_length = urb->actual_length;
1294         }
1295
1296         usb_free_urb(urb);
1297         return status;
1298 }
1299
1300 /*-------------------------------------------------------------------*/
1301 // returns status (negative) or length (positive)
1302 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
1303                                        unsigned int pipe,
1304                                        struct usb_ctrlrequest *cmd, void *data,
1305                                        int len, int timeout)
1306 {
1307         struct urb *urb;
1308         int retv;
1309         int length = 0; /* shut up GCC */
1310
1311         urb = usb_alloc_urb(0, GFP_NOIO);
1312         if (!urb)
1313                 return -ENOMEM;
1314
1315         usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data,
1316                          len, usb_api_blocking_completion, NULL);
1317
1318         retv = usb_start_wait_urb(urb, timeout, &length);
1319         if (retv < 0) {
1320                 return retv;
1321         }
1322         else {
1323                 return length;
1324         }
1325 }
1326
1327
1328 /****************************************************************
1329  *     kaweth_init
1330  ****************************************************************/
1331 static int __init kaweth_init(void)
1332 {
1333         dbg("Driver loading");
1334         return usb_register(&kaweth_driver);
1335 }
1336
1337 /****************************************************************
1338  *     kaweth_exit
1339  ****************************************************************/
1340 static void __exit kaweth_exit(void)
1341 {
1342         usb_deregister(&kaweth_driver);
1343 }
1344
1345 module_init(kaweth_init);
1346 module_exit(kaweth_exit);
1347
1348
1349
1350
1351
1352
1353
1354
1355