drivers/usb/net/kaweth.c

   1 /****************************************************************
   2  *
   3  *     kaweth.c - driver for KL5KUSB101 based USB->Ethernet
   4  *
   5  *     (c) 2000 Interlan Communications
   6  *     (c) 2000 Stephane Alnet
   7  *     (C) 2001 Brad Hards
   8  *     (C) 2002 Oliver Neukum
   9  *
  10  *     Original author: The Zapman <zapman@interlan.net>
  11  *     Inspired by, and much credit goes to Michael Rothwell
  12  *     <rothwell@interlan.net> for the test equipment, help, and patience
  13  *     Based off of (and with thanks to) Petko Manolov's pegaus.c driver.
  14  *     Also many thanks to Joel Silverman and Ed Surprenant at Kawasaki
  15  *     for providing the firmware and driver resources.
  16  *
  17  *     This program is free software; you can redistribute it and/or
  18  *     modify it under the terms of the GNU General Public License as
  19  *     published by the Free Software Foundation; either version 2, or
  20  *     (at your option) any later version.
  21  *
  22  *     This program is distributed in the hope that it will be useful,
  23  *     but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25  *     GNU General Public License for more details.
  26  *
  27  *     You should have received a copy of the GNU General Public License
  28  *     along with this program; if not, write to the Free Software Foundation,
  29  *     Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  30  *
  31  ****************************************************************/
  32
  33 /* TODO:
  34  * Fix in_interrupt() problem
  35  * Develop test procedures for USB net interfaces
  36  * Run test procedures
  37  * Fix bugs from previous two steps
  38  * Snoop other OSs for any tricks we're not doing
  39  * SMP locking
  40  * Reduce arbitrary timeouts
  41  * Smart multicast support
  42  * Temporary MAC change support
  43  * Tunable SOFs parameter - ioctl()?
  44  * Ethernet stats collection
  45  * Code formatting improvements
  46  */
  47
  48 #include <linux/module.h>
  49 #include <linux/slab.h>
  50 #include <linux/string.h>
  51 #include <linux/init.h>
  52 #include <linux/delay.h>
  53 #include <linux/netdevice.h>
  54 #include <linux/etherdevice.h>
  55 #include <linux/usb.h>
  56 #include <linux/types.h>
  57 #include <linux/ethtool.h>
  58 #include <linux/pci.h>
  59 #include <linux/dma-mapping.h>
  60 #include <linux/wait.h>
  61 #include <asm/uaccess.h>
  62 #include <asm/semaphore.h>
  63 #include <asm/byteorder.h>
  64
  65 #undef DEBUG
  66
  67 #include "kawethfw.h"
  68
  69 #define KAWETH_MTU                      1514
  70 #define KAWETH_BUF_SIZE                 1664
  71 #define KAWETH_TX_TIMEOUT               (5 * HZ)
  72 #define KAWETH_SCRATCH_SIZE             32
  73 #define KAWETH_FIRMWARE_BUF_SIZE        4096
  74 #define KAWETH_CONTROL_TIMEOUT          (30 * HZ)
  75
  76 #define KAWETH_STATUS_BROKEN            0x0000001
  77 #define KAWETH_STATUS_CLOSING           0x0000002
  78 #define KAWETH_STATUS_SUSPENDING        0x0000004
  79
  80 #define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING)
  81
  82 #define KAWETH_PACKET_FILTER_PROMISCUOUS        0x01
  83 #define KAWETH_PACKET_FILTER_ALL_MULTICAST      0x02
  84 #define KAWETH_PACKET_FILTER_DIRECTED           0x04
  85 #define KAWETH_PACKET_FILTER_BROADCAST          0x08
  86 #define KAWETH_PACKET_FILTER_MULTICAST          0x10
  87
  88 /* Table 7 */
  89 #define KAWETH_COMMAND_GET_ETHERNET_DESC        0x00
  90 #define KAWETH_COMMAND_MULTICAST_FILTERS        0x01
  91 #define KAWETH_COMMAND_SET_PACKET_FILTER        0x02
  92 #define KAWETH_COMMAND_STATISTICS               0x03
  93 #define KAWETH_COMMAND_SET_TEMP_MAC             0x06
  94 #define KAWETH_COMMAND_GET_TEMP_MAC             0x07
  95 #define KAWETH_COMMAND_SET_URB_SIZE             0x08
  96 #define KAWETH_COMMAND_SET_SOFS_WAIT            0x09
  97 #define KAWETH_COMMAND_SCAN                     0xFF
  98
  99 #define KAWETH_SOFS_TO_WAIT                     0x05
 100
 101 #define INTBUFFERSIZE                           4
 102
 103 #define STATE_OFFSET                            0
 104 #define STATE_MASK                              0x40
 105 #define STATE_SHIFT                             5
 106
 107 #define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED)
 108
 109
 110 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>");
 111 MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver");
 112 MODULE_LICENSE("GPL");
 113
 114 static const char driver_name[] = "kaweth";
 115
 116 static int kaweth_probe(
 117                 struct usb_interface *intf,
 118                 const struct usb_device_id *id  /* from id_table */
 119         );
 120 static void kaweth_disconnect(struct usb_interface *intf);
 121 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
 122                                        unsigned int pipe,
 123                                        struct usb_ctrlrequest *cmd, void *data,
 124                                        int len, int timeout);
 125 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message);
 126 static int kaweth_resume(struct usb_interface *intf);
 127
 128 /****************************************************************
 129  *     usb_device_id
 130  ****************************************************************/
 131 static struct usb_device_id usb_klsi_table[] = {
 132         { USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */
 133         { USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */
 134         { USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */
 135         { USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */
 136         { USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */
 137         { USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */
 138         { USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */
 139         { USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */
 140         { USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */
 141         { USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */
 142         { USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */
 143         { USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */
 144         { USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */
 145         { USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */
 146         { USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */
 147         { USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */
 148         { USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */
 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 } __attribute__ ((packed));
 211
 212 /****************************************************************
 213  *     kaweth_device
 214  ****************************************************************/
 215 struct kaweth_device
 216 {
 217         spinlock_t device_lock;
 218
 219         __u32 status;
 220         int end;
 221         int suspend_lowmem_rx;
 222         int suspend_lowmem_ctrl;
 223         int linkstate;
 224         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 /****************************************************************
 255  *     kaweth_control
 256  ****************************************************************/
 257 static int kaweth_control(struct kaweth_device *kaweth,
 258                           unsigned int pipe,
 259                           __u8 request,
 260                           __u8 requesttype,
 261                           __u16 value,
 262                           __u16 index,
 263                           void *data,
 264                           __u16 size,
 265                           int timeout)
 266 {
 267         struct usb_ctrlrequest *dr;
 268
 269         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_le16p(&value);
 286         dr->wIndex = cpu_to_le16p(&index);
 287         dr->wLength = cpu_to_le16p(&size);
 288
 289         return kaweth_internal_control_msg(kaweth->dev,
 290                                         pipe,
 291                                         dr,
 292                                         data,
 293                                         size,
 294                                         timeout);
 295 }
 296
 297 /****************************************************************
 298  *     kaweth_read_configuration
 299  ****************************************************************/
 300 static int kaweth_read_configuration(struct kaweth_device *kaweth)
 301 {
 302         int retval;
 303
 304         dbg("Reading kaweth configuration");
 305
 306         retval = kaweth_control(kaweth,
 307                                 usb_rcvctrlpipe(kaweth->dev, 0),
 308                                 KAWETH_COMMAND_GET_ETHERNET_DESC,
 309                                 USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE,
 310                                 0,
 311                                 0,
 312                                 (void *)&kaweth->configuration,
 313                                 sizeof(kaweth->configuration),
 314                                 KAWETH_CONTROL_TIMEOUT);
 315
 316         return retval;
 317 }
 318
 319 /****************************************************************
 320  *     kaweth_set_urb_size
 321  ****************************************************************/
 322 static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size)
 323 {
 324         int retval;
 325
 326         dbg("Setting URB size to %d", (unsigned)urb_size);
 327
 328         retval = kaweth_control(kaweth,
 329                                 usb_sndctrlpipe(kaweth->dev, 0),
 330                                 KAWETH_COMMAND_SET_URB_SIZE,
 331                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 332                                 urb_size,
 333                                 0,
 334                                 (void *)&kaweth->scratch,
 335                                 0,
 336                                 KAWETH_CONTROL_TIMEOUT);
 337
 338         return retval;
 339 }
 340
 341 /****************************************************************
 342  *     kaweth_set_sofs_wait
 343  ****************************************************************/
 344 static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait)
 345 {
 346         int retval;
 347
 348         dbg("Set SOFS wait to %d", (unsigned)sofs_wait);
 349
 350         retval = kaweth_control(kaweth,
 351                                 usb_sndctrlpipe(kaweth->dev, 0),
 352                                 KAWETH_COMMAND_SET_SOFS_WAIT,
 353                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 354                                 sofs_wait,
 355                                 0,
 356                                 (void *)&kaweth->scratch,
 357                                 0,
 358                                 KAWETH_CONTROL_TIMEOUT);
 359
 360         return retval;
 361 }
 362
 363 /****************************************************************
 364  *     kaweth_set_receive_filter
 365  ****************************************************************/
 366 static int kaweth_set_receive_filter(struct kaweth_device *kaweth,
 367                                      __u16 receive_filter)
 368 {
 369         int retval;
 370
 371         dbg("Set receive filter to %d", (unsigned)receive_filter);
 372
 373         retval = kaweth_control(kaweth,
 374                                 usb_sndctrlpipe(kaweth->dev, 0),
 375                                 KAWETH_COMMAND_SET_PACKET_FILTER,
 376                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 377                                 receive_filter,
 378                                 0,
 379                                 (void *)&kaweth->scratch,
 380                                 0,
 381                                 KAWETH_CONTROL_TIMEOUT);
 382
 383         return retval;
 384 }
 385
 386 /****************************************************************
 387  *     kaweth_download_firmware
 388  ****************************************************************/
 389 static int kaweth_download_firmware(struct kaweth_device *kaweth,
 390                                     __u8 *data,
 391                                     __u16 data_len,
 392                                     __u8 interrupt,
 393                                     __u8 type)
 394 {
 395         if(data_len > KAWETH_FIRMWARE_BUF_SIZE) {
 396                 err("Firmware too big: %d", data_len);
 397                 return -ENOSPC;
 398         }
 399
 400         memcpy(kaweth->firmware_buf, data, data_len);
 401
 402         kaweth->firmware_buf[2] = (data_len & 0xFF) - 7;
 403         kaweth->firmware_buf[3] = data_len >> 8;
 404         kaweth->firmware_buf[4] = type;
 405         kaweth->firmware_buf[5] = interrupt;
 406
 407         dbg("High: %i, Low:%i", kaweth->firmware_buf[3],
 408                    kaweth->firmware_buf[2]);
 409
 410         dbg("Downloading firmware at %p to kaweth device at %p",
 411             data,
 412             kaweth);
 413         dbg("Firmware length: %d", data_len);
 414
 415         return kaweth_control(kaweth,
 416                               usb_sndctrlpipe(kaweth->dev, 0),
 417                               KAWETH_COMMAND_SCAN,
 418                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 419                               0,
 420                               0,
 421                               (void *)kaweth->firmware_buf,
 422                               data_len,
 423                               KAWETH_CONTROL_TIMEOUT);
 424 }
 425
 426 /****************************************************************
 427  *     kaweth_trigger_firmware
 428  ****************************************************************/
 429 static int kaweth_trigger_firmware(struct kaweth_device *kaweth,
 430                                    __u8 interrupt)
 431 {
 432         kaweth->firmware_buf[0] = 0xB6;
 433         kaweth->firmware_buf[1] = 0xC3;
 434         kaweth->firmware_buf[2] = 0x01;
 435         kaweth->firmware_buf[3] = 0x00;
 436         kaweth->firmware_buf[4] = 0x06;
 437         kaweth->firmware_buf[5] = interrupt;
 438         kaweth->firmware_buf[6] = 0x00;
 439         kaweth->firmware_buf[7] = 0x00;
 440
 441         dbg("Triggering firmware");
 442
 443         return kaweth_control(kaweth,
 444                               usb_sndctrlpipe(kaweth->dev, 0),
 445                               KAWETH_COMMAND_SCAN,
 446                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 447                               0,
 448                               0,
 449                               (void *)kaweth->firmware_buf,
 450                               8,
 451                               KAWETH_CONTROL_TIMEOUT);
 452 }
 453
 454 /****************************************************************
 455  *     kaweth_reset
 456  ****************************************************************/
 457 static int kaweth_reset(struct kaweth_device *kaweth)
 458 {
 459         int result;
 460
 461         dbg("kaweth_reset(%p)", kaweth);
 462         result = kaweth_control(kaweth,
 463                                 usb_sndctrlpipe(kaweth->dev, 0),
 464                                 USB_REQ_SET_CONFIGURATION,
 465                                 0,
 466                                 kaweth->dev->config[0].desc.bConfigurationValue,
 467                                 0,
 468                                 NULL,
 469                                 0,
 470                                 KAWETH_CONTROL_TIMEOUT);
 471
 472         mdelay(10);
 473
 474         dbg("kaweth_reset() returns %d.",result);
 475
 476         return result;
 477 }
 478
 479 static void kaweth_usb_receive(struct urb *);
 480 static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t);
 481
 482 /****************************************************************
 483         int_callback
 484 *****************************************************************/
 485
 486 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf)
 487 {
 488         int status;
 489
 490         status = usb_submit_urb (kaweth->irq_urb, mf);
 491         if (unlikely(status == -ENOMEM)) {
 492                 kaweth->suspend_lowmem_ctrl = 1;
 493                 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
 494         } else {
 495                 kaweth->suspend_lowmem_ctrl = 0;
 496         }
 497
 498         if (status)
 499                 err ("can't resubmit intr, %s-%s, status %d",
 500                                 kaweth->dev->bus->bus_name,
 501                                 kaweth->dev->devpath, status);
 502 }
 503
 504 static void int_callback(struct urb *u)
 505 {
 506         struct kaweth_device *kaweth = u->context;
 507         int act_state;
 508
 509         switch (u->status) {
 510         case 0:                 /* success */
 511                 break;
 512         case -ECONNRESET:       /* unlink */
 513         case -ENOENT:
 514         case -ESHUTDOWN:
 515                 return;
 516         /* -EPIPE:  should clear the halt */
 517         default:                /* error */
 518                 goto resubmit;
 519         }
 520
 521         /* we check the link state to report changes */
 522         if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) {
 523                 if (act_state)
 524                         netif_carrier_on(kaweth->net);
 525                 else
 526                         netif_carrier_off(kaweth->net);
 527
 528                 kaweth->linkstate = act_state;
 529         }
 530 resubmit:
 531         kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC);
 532 }
 533
 534 static void kaweth_resubmit_tl(struct work_struct *work)
 535 {
 536         struct kaweth_device *kaweth =
 537                 container_of(work, struct kaweth_device, lowmem_work.work);
 538
 539         if (IS_BLOCKED(kaweth->status))
 540                 return;
 541
 542         if (kaweth->suspend_lowmem_rx)
 543                 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
 544
 545         if (kaweth->suspend_lowmem_ctrl)
 546                 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
 547 }
 548
 549
 550 /****************************************************************
 551  *     kaweth_resubmit_rx_urb
 552  ****************************************************************/
 553 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth,
 554                                                 gfp_t mem_flags)
 555 {
 556         int result;
 557
 558         usb_fill_bulk_urb(kaweth->rx_urb,
 559                       kaweth->dev,
 560                       usb_rcvbulkpipe(kaweth->dev, 1),
 561                       kaweth->rx_buf,
 562                       KAWETH_BUF_SIZE,
 563                       kaweth_usb_receive,
 564                       kaweth);
 565         kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 566         kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle;
 567
 568         if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) {
 569                 if (result == -ENOMEM) {
 570                         kaweth->suspend_lowmem_rx = 1;
 571                         schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
 572                 }
 573                 err("resubmitting rx_urb %d failed", result);
 574         } else {
 575                 kaweth->suspend_lowmem_rx = 0;
 576         }
 577
 578         return result;
 579 }
 580
 581 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth);
 582
 583 /****************************************************************
 584  *     kaweth_usb_receive
 585  ****************************************************************/
 586 static void kaweth_usb_receive(struct urb *urb)
 587 {
 588         struct kaweth_device *kaweth = urb->context;
 589         struct net_device *net = kaweth->net;
 590
 591         int count = urb->actual_length;
 592         int count2 = urb->transfer_buffer_length;
 593
 594         __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf);
 595
 596         struct sk_buff *skb;
 597
 598         if(unlikely(urb->status == -ECONNRESET || urb->status == -ESHUTDOWN))
 599         /* we are killed - set a flag and wake the disconnect handler */
 600         {
 601                 kaweth->end = 1;
 602                 wake_up(&kaweth->term_wait);
 603                 return;
 604         }
 605
 606         spin_lock(&kaweth->device_lock);
 607         if (IS_BLOCKED(kaweth->status)) {
 608                 spin_unlock(&kaweth->device_lock);
 609                 return;
 610         }
 611         spin_unlock(&kaweth->device_lock);
 612
 613         if(urb->status && urb->status != -EREMOTEIO && count != 1) {
 614                 err("%s RX status: %d count: %d packet_len: %d",
 615                            net->name,
 616                            urb->status,
 617                            count,
 618                            (int)pkt_len);
 619                 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 620                 return;
 621         }
 622
 623         if(kaweth->net && (count > 2)) {
 624                 if(pkt_len > (count - 2)) {
 625                         err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count);
 626                         err("Packet len & 2047: %x", pkt_len & 2047);
 627                         err("Count 2: %x", count2);
 628                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 629                         return;
 630                 }
 631
 632                 if(!(skb = dev_alloc_skb(pkt_len+2))) {
 633                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 634                         return;
 635                 }
 636
 637                 skb_reserve(skb, 2);    /* Align IP on 16 byte boundaries */
 638
 639                 eth_copy_and_sum(skb, kaweth->rx_buf + 2, pkt_len, 0);
 640
 641                 skb_put(skb, pkt_len);
 642
 643                 skb->protocol = eth_type_trans(skb, net);
 644
 645                 netif_rx(skb);
 646
 647                 kaweth->stats.rx_packets++;
 648                 kaweth->stats.rx_bytes += pkt_len;
 649         }
 650
 651         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 652 }
 653
 654 /****************************************************************
 655  *     kaweth_open
 656  ****************************************************************/
 657 static int kaweth_open(struct net_device *net)
 658 {
 659         struct kaweth_device *kaweth = netdev_priv(net);
 660         int res;
 661
 662         dbg("Opening network device.");
 663
 664         res = usb_autopm_get_interface(kaweth->intf);
 665         if (res) {
 666                 err("Interface cannot be resumed.");
 667                 return -EIO;
 668         }
 669         res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL);
 670         if (res)
 671                 goto err_out;
 672
 673         usb_fill_int_urb(
 674                 kaweth->irq_urb,
 675                 kaweth->dev,
 676                 usb_rcvintpipe(kaweth->dev, 3),
 677                 kaweth->intbuffer,
 678                 INTBUFFERSIZE,
 679                 int_callback,
 680                 kaweth,
 681                 250); /* overriding the descriptor */
 682         kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle;
 683         kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 684
 685         res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL);
 686         if (res) {
 687                 usb_kill_urb(kaweth->rx_urb);
 688                 goto err_out;
 689         }
 690         kaweth->opened = 1;
 691
 692         netif_start_queue(net);
 693
 694         kaweth_async_set_rx_mode(kaweth);
 695         return 0;
 696
 697 err_out:
 698         usb_autopm_enable(kaweth->intf);
 699         return -EIO;
 700 }
 701
 702 /****************************************************************
 703  *     kaweth_kill_urbs
 704  ****************************************************************/
 705 static void kaweth_kill_urbs(struct kaweth_device *kaweth)
 706 {
 707         usb_kill_urb(kaweth->irq_urb);
 708         usb_kill_urb(kaweth->rx_urb);
 709         usb_kill_urb(kaweth->tx_urb);
 710
 711         flush_scheduled_work();
 712
 713         /* a scheduled work may have resubmitted,
 714            we hit them again */
 715         usb_kill_urb(kaweth->irq_urb);
 716         usb_kill_urb(kaweth->rx_urb);
 717 }
 718
 719 /****************************************************************
 720  *     kaweth_close
 721  ****************************************************************/
 722 static int kaweth_close(struct net_device *net)
 723 {
 724         struct kaweth_device *kaweth = netdev_priv(net);
 725
 726         netif_stop_queue(net);
 727         kaweth->opened = 0;
 728
 729         kaweth->status |= KAWETH_STATUS_CLOSING;
 730
 731         kaweth_kill_urbs(kaweth);
 732
 733         kaweth->status &= ~KAWETH_STATUS_CLOSING;
 734
 735         usb_autopm_enable(kaweth->intf);
 736
 737         return 0;
 738 }
 739
 740 static void kaweth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
 741 {
 742         struct kaweth_device *kaweth = netdev_priv(dev);
 743
 744         strlcpy(info->driver, driver_name, sizeof(info->driver));
 745         usb_make_path(kaweth->dev, info->bus_info, sizeof (info->bus_info));
 746 }
 747
 748 static u32 kaweth_get_link(struct net_device *dev)
 749 {
 750         struct kaweth_device *kaweth = netdev_priv(dev);
 751
 752         return kaweth->linkstate;
 753 }
 754
 755 static struct ethtool_ops ops = {
 756         .get_drvinfo    = kaweth_get_drvinfo,
 757         .get_link       = kaweth_get_link
 758 };
 759
 760 /****************************************************************
 761  *     kaweth_usb_transmit_complete
 762  ****************************************************************/
 763 static void kaweth_usb_transmit_complete(struct urb *urb)
 764 {
 765         struct kaweth_device *kaweth = urb->context;
 766         struct sk_buff *skb = kaweth->tx_skb;
 767
 768         if (unlikely(urb->status != 0))
 769                 if (urb->status != -ENOENT)
 770                         dbg("%s: TX status %d.", kaweth->net->name, urb->status);
 771
 772         netif_wake_queue(kaweth->net);
 773         dev_kfree_skb_irq(skb);
 774 }
 775
 776 /****************************************************************
 777  *     kaweth_start_xmit
 778  ****************************************************************/
 779 static int kaweth_start_xmit(struct sk_buff *skb, struct net_device *net)
 780 {
 781         struct kaweth_device *kaweth = netdev_priv(net);
 782         __le16 *private_header;
 783
 784         int res;
 785
 786         spin_lock(&kaweth->device_lock);
 787
 788         kaweth_async_set_rx_mode(kaweth);
 789         netif_stop_queue(net);
 790         if (IS_BLOCKED(kaweth->status)) {
 791                 goto skip;
 792         }
 793
 794         /* We now decide whether we can put our special header into the sk_buff */
 795         if (skb_cloned(skb) || skb_headroom(skb) < 2) {
 796                 /* no such luck - we make our own */
 797                 struct sk_buff *copied_skb;
 798                 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC);
 799                 dev_kfree_skb_irq(skb);
 800                 skb = copied_skb;
 801                 if (!copied_skb) {
 802                         kaweth->stats.tx_errors++;
 803                         netif_start_queue(net);
 804                         spin_unlock(&kaweth->device_lock);
 805                         return 0;
 806                 }
 807         }
 808
 809         private_header = (__le16 *)__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                 warn("kaweth failed tx_urb %d", res);
 825 skip:
 826                 kaweth->stats.tx_errors++;
 827
 828                 netif_start_queue(net);
 829                 dev_kfree_skb_irq(skb);
 830         }
 831         else
 832         {
 833                 kaweth->stats.tx_packets++;
 834                 kaweth->stats.tx_bytes += skb->len;
 835                 net->trans_start = jiffies;
 836         }
 837
 838         spin_unlock(&kaweth->device_lock);
 839
 840         return 0;
 841 }
 842
 843 /****************************************************************
 844  *     kaweth_set_rx_mode
 845  ****************************************************************/
 846 static void kaweth_set_rx_mode(struct net_device *net)
 847 {
 848         struct kaweth_device *kaweth = netdev_priv(net);
 849
 850         __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
 851                                      KAWETH_PACKET_FILTER_BROADCAST |
 852                                      KAWETH_PACKET_FILTER_MULTICAST;
 853
 854         dbg("Setting Rx mode to %d", packet_filter_bitmap);
 855
 856         netif_stop_queue(net);
 857
 858         if (net->flags & IFF_PROMISC) {
 859                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
 860         }
 861         else if ((net->mc_count) || (net->flags & IFF_ALLMULTI)) {
 862                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
 863         }
 864
 865         kaweth->packet_filter_bitmap = packet_filter_bitmap;
 866         netif_wake_queue(net);
 867 }
 868
 869 /****************************************************************
 870  *     kaweth_async_set_rx_mode
 871  ****************************************************************/
 872 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
 873 {
 874         __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
 875         kaweth->packet_filter_bitmap = 0;
 876         if (packet_filter_bitmap == 0)
 877                 return;
 878
 879         {
 880         int result;
 881         result = kaweth_control(kaweth,
 882                                 usb_sndctrlpipe(kaweth->dev, 0),
 883                                 KAWETH_COMMAND_SET_PACKET_FILTER,
 884                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 885                                 packet_filter_bitmap,
 886                                 0,
 887                                 (void *)&kaweth->scratch,
 888                                 0,
 889                                 KAWETH_CONTROL_TIMEOUT);
 890
 891         if(result < 0) {
 892                 err("Failed to set Rx mode: %d", result);
 893         }
 894         else {
 895                 dbg("Set Rx mode to %d", packet_filter_bitmap);
 896         }
 897         }
 898 }
 899
 900 /****************************************************************
 901  *     kaweth_netdev_stats
 902  ****************************************************************/
 903 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev)
 904 {
 905         struct kaweth_device *kaweth = netdev_priv(dev);
 906         return &kaweth->stats;
 907 }
 908
 909 /****************************************************************
 910  *     kaweth_tx_timeout
 911  ****************************************************************/
 912 static void kaweth_tx_timeout(struct net_device *net)
 913 {
 914         struct kaweth_device *kaweth = netdev_priv(net);
 915
 916         warn("%s: Tx timed out. Resetting.", net->name);
 917         kaweth->stats.tx_errors++;
 918         net->trans_start = jiffies;
 919
 920         usb_unlink_urb(kaweth->tx_urb);
 921 }
 922
 923 /****************************************************************
 924  *     kaweth_suspend
 925  ****************************************************************/
 926 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message)
 927 {
 928         struct kaweth_device *kaweth = usb_get_intfdata(intf);
 929         unsigned long flags;
 930
 931         dbg("Suspending device");
 932         spin_lock_irqsave(&kaweth->device_lock, flags);
 933         kaweth->status |= KAWETH_STATUS_SUSPENDING;
 934         spin_unlock_irqrestore(&kaweth->device_lock, flags);
 935
 936         kaweth_kill_urbs(kaweth);
 937         return 0;
 938 }
 939
 940 /****************************************************************
 941  *     kaweth_resume
 942  ****************************************************************/
 943 static int kaweth_resume(struct usb_interface *intf)
 944 {
 945         struct kaweth_device *kaweth = usb_get_intfdata(intf);
 946         unsigned long flags;
 947
 948         dbg("Resuming 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         if (!kaweth->opened)
 954                 return 0;
 955         kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
 956         kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
 957
 958         return 0;
 959 }
 960
 961 /****************************************************************
 962  *     kaweth_probe
 963  ****************************************************************/
 964 static int kaweth_probe(
 965                 struct usb_interface *intf,
 966                 const struct usb_device_id *id      /* from id_table */
 967         )
 968 {
 969         struct usb_device *dev = interface_to_usbdev(intf);
 970         struct kaweth_device *kaweth;
 971         struct net_device *netdev;
 972         const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 973         int result = 0;
 974
 975         dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x",
 976                  dev->devnum,
 977                  le16_to_cpu(dev->descriptor.idVendor),
 978                  le16_to_cpu(dev->descriptor.idProduct),
 979                  le16_to_cpu(dev->descriptor.bcdDevice));
 980
 981         dbg("Device at %p", dev);
 982
 983         dbg("Descriptor length: %x type: %x",
 984                  (int)dev->descriptor.bLength,
 985                  (int)dev->descriptor.bDescriptorType);
 986
 987         netdev = alloc_etherdev(sizeof(*kaweth));
 988         if (!netdev)
 989                 return -ENOMEM;
 990
 991         kaweth = netdev_priv(netdev);
 992         kaweth->dev = dev;
 993         kaweth->net = netdev;
 994
 995         spin_lock_init(&kaweth->device_lock);
 996         init_waitqueue_head(&kaweth->term_wait);
 997
 998         dbg("Resetting.");
 999
1000         kaweth_reset(kaweth);
1001
1002         /*
1003          * If high byte of bcdDevice is nonzero, firmware is already
1004          * downloaded. Don't try to do it again, or we'll hang the device.
1005          */
1006
1007         if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) {
1008                 info("Firmware present in device.");
1009         } else {
1010                 /* Download the firmware */
1011                 info("Downloading firmware...");
1012                 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
1013                 if ((result = kaweth_download_firmware(kaweth,
1014                                                       kaweth_new_code,
1015                                                       len_kaweth_new_code,
1016                                                       100,
1017                                                       2)) < 0) {
1018                         err("Error downloading firmware (%d)", result);
1019                         goto err_fw;
1020                 }
1021
1022                 if ((result = kaweth_download_firmware(kaweth,
1023                                                       kaweth_new_code_fix,
1024                                                       len_kaweth_new_code_fix,
1025                                                       100,
1026                                                       3)) < 0) {
1027                         err("Error downloading firmware fix (%d)", result);
1028                         goto err_fw;
1029                 }
1030
1031                 if ((result = kaweth_download_firmware(kaweth,
1032                                                       kaweth_trigger_code,
1033                                                       len_kaweth_trigger_code,
1034                                                       126,
1035                                                       2)) < 0) {
1036                         err("Error downloading trigger code (%d)", result);
1037                         goto err_fw;
1038
1039                 }
1040
1041                 if ((result = kaweth_download_firmware(kaweth,
1042                                                       kaweth_trigger_code_fix,
1043                                                       len_kaweth_trigger_code_fix,
1044                                                       126,
1045                                                       3)) < 0) {
1046                         err("Error downloading trigger code fix (%d)", result);
1047                         goto err_fw;
1048                 }
1049
1050
1051                 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
1052                         err("Error triggering firmware (%d)", result);
1053                         goto err_fw;
1054                 }
1055
1056                 /* Device will now disappear for a moment...  */
1057                 info("Firmware loaded.  I'll be back...");
1058 err_fw:
1059                 free_page((unsigned long)kaweth->firmware_buf);
1060                 free_netdev(netdev);
1061                 return -EIO;
1062         }
1063
1064         result = kaweth_read_configuration(kaweth);
1065
1066         if(result < 0) {
1067                 err("Error reading configuration (%d), no net device created", result);
1068                 goto err_free_netdev;
1069         }
1070
1071         info("Statistics collection: %x", kaweth->configuration.statistics_mask);
1072         info("Multicast filter limit: %x", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
1073         info("MTU: %d", le16_to_cpu(kaweth->configuration.segment_size));
1074         info("Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
1075                  (int)kaweth->configuration.hw_addr[0],
1076                  (int)kaweth->configuration.hw_addr[1],
1077                  (int)kaweth->configuration.hw_addr[2],
1078                  (int)kaweth->configuration.hw_addr[3],
1079                  (int)kaweth->configuration.hw_addr[4],
1080                  (int)kaweth->configuration.hw_addr[5]);
1081
1082         if(!memcmp(&kaweth->configuration.hw_addr,
1083                    &bcast_addr,
1084                    sizeof(bcast_addr))) {
1085                 err("Firmware not functioning properly, no net device created");
1086                 goto err_free_netdev;
1087         }
1088
1089         if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
1090                 dbg("Error setting URB size");
1091                 goto err_free_netdev;
1092         }
1093
1094         if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
1095                 err("Error setting SOFS wait");
1096                 goto err_free_netdev;
1097         }
1098
1099         result = kaweth_set_receive_filter(kaweth,
1100                                            KAWETH_PACKET_FILTER_DIRECTED |
1101                                            KAWETH_PACKET_FILTER_BROADCAST |
1102                                            KAWETH_PACKET_FILTER_MULTICAST);
1103
1104         if(result < 0) {
1105                 err("Error setting receive filter");
1106                 goto err_free_netdev;
1107         }
1108
1109         dbg("Initializing net device.");
1110
1111         kaweth->intf = intf;
1112
1113         kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1114         if (!kaweth->tx_urb)
1115                 goto err_free_netdev;
1116         kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1117         if (!kaweth->rx_urb)
1118                 goto err_only_tx;
1119         kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1120         if (!kaweth->irq_urb)
1121                 goto err_tx_and_rx;
1122
1123         kaweth->intbuffer = usb_buffer_alloc(   kaweth->dev,
1124                                                 INTBUFFERSIZE,
1125                                                 GFP_KERNEL,
1126                                                 &kaweth->intbufferhandle);
1127         if (!kaweth->intbuffer)
1128                 goto err_tx_and_rx_and_irq;
1129         kaweth->rx_buf = usb_buffer_alloc(      kaweth->dev,
1130                                                 KAWETH_BUF_SIZE,
1131                                                 GFP_KERNEL,
1132                                                 &kaweth->rxbufferhandle);
1133         if (!kaweth->rx_buf)
1134                 goto err_all_but_rxbuf;
1135
1136         memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr));
1137         memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr,
1138                sizeof(kaweth->configuration.hw_addr));
1139
1140         netdev->open = kaweth_open;
1141         netdev->stop = kaweth_close;
1142
1143         netdev->watchdog_timeo = KAWETH_TX_TIMEOUT;
1144         netdev->tx_timeout = kaweth_tx_timeout;
1145
1146         netdev->hard_start_xmit = kaweth_start_xmit;
1147         netdev->set_multicast_list = kaweth_set_rx_mode;
1148         netdev->get_stats = kaweth_netdev_stats;
1149         netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size);
1150         SET_ETHTOOL_OPS(netdev, &ops);
1151
1152         /* kaweth is zeroed as part of alloc_netdev */
1153
1154         INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl);
1155
1156         SET_MODULE_OWNER(netdev);
1157
1158         usb_set_intfdata(intf, kaweth);
1159
1160 #if 0
1161 // dma_supported() is deeply broken on almost all architectures
1162         if (dma_supported (&intf->dev, 0xffffffffffffffffULL))
1163                 kaweth->net->features |= NETIF_F_HIGHDMA;
1164 #endif
1165
1166         SET_NETDEV_DEV(netdev, &intf->dev);
1167         if (register_netdev(netdev) != 0) {
1168                 err("Error registering netdev.");
1169                 goto err_intfdata;
1170         }
1171
1172         info("kaweth interface created at %s", kaweth->net->name);
1173
1174         dbg("Kaweth probe returning.");
1175
1176         return 0;
1177
1178 err_intfdata:
1179         usb_set_intfdata(intf, NULL);
1180         usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1181 err_all_but_rxbuf:
1182         usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1183 err_tx_and_rx_and_irq:
1184         usb_free_urb(kaweth->irq_urb);
1185 err_tx_and_rx:
1186         usb_free_urb(kaweth->rx_urb);
1187 err_only_tx:
1188         usb_free_urb(kaweth->tx_urb);
1189 err_free_netdev:
1190         free_netdev(netdev);
1191
1192         return -EIO;
1193 }
1194
1195 /****************************************************************
1196  *     kaweth_disconnect
1197  ****************************************************************/
1198 static void kaweth_disconnect(struct usb_interface *intf)
1199 {
1200         struct kaweth_device *kaweth = usb_get_intfdata(intf);
1201         struct net_device *netdev;
1202
1203         info("Unregistering");
1204
1205         usb_set_intfdata(intf, NULL);
1206         if (!kaweth) {
1207                 warn("unregistering non-existant device");
1208                 return;
1209         }
1210         netdev = kaweth->net;
1211
1212         dbg("Unregistering net device");
1213         unregister_netdev(netdev);
1214
1215         usb_free_urb(kaweth->rx_urb);
1216         usb_free_urb(kaweth->tx_urb);
1217         usb_free_urb(kaweth->irq_urb);
1218
1219         usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1220         usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1221
1222         free_netdev(netdev);
1223 }
1224
1225
1226 // FIXME this completion stuff is a modified clone of
1227 // an OLD version of some stuff in usb.c ...
1228 struct usb_api_data {
1229         wait_queue_head_t wqh;
1230         int done;
1231 };
1232
1233 /*-------------------------------------------------------------------*
1234  * completion handler for compatibility wrappers (sync control/bulk) *
1235  *-------------------------------------------------------------------*/
1236 static void usb_api_blocking_completion(struct urb *urb)
1237 {
1238         struct usb_api_data *awd = (struct usb_api_data *)urb->context;
1239
1240         awd->done=1;
1241         wake_up(&awd->wqh);
1242 }
1243
1244 /*-------------------------------------------------------------------*
1245  *                         COMPATIBILITY STUFF                       *
1246  *-------------------------------------------------------------------*/
1247
1248 // Starts urb and waits for completion or timeout
1249 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
1250 {
1251         struct usb_api_data awd;
1252         int status;
1253
1254         init_waitqueue_head(&awd.wqh);
1255         awd.done = 0;
1256
1257         urb->context = &awd;
1258         status = usb_submit_urb(urb, GFP_NOIO);
1259         if (status) {
1260                 // something went wrong
1261                 usb_free_urb(urb);
1262                 return status;
1263         }
1264
1265         if (!wait_event_timeout(awd.wqh, awd.done, timeout)) {
1266                 // timeout
1267                 warn("usb_control/bulk_msg: timeout");
1268                 usb_kill_urb(urb);  // remove urb safely
1269                 status = -ETIMEDOUT;
1270         }
1271         else {
1272                 status = urb->status;
1273         }
1274
1275         if (actual_length) {
1276                 *actual_length = urb->actual_length;
1277         }
1278
1279         usb_free_urb(urb);
1280         return status;
1281 }
1282
1283 /*-------------------------------------------------------------------*/
1284 // returns status (negative) or length (positive)
1285 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
1286                                        unsigned int pipe,
1287                                        struct usb_ctrlrequest *cmd, void *data,
1288                                        int len, int timeout)
1289 {
1290         struct urb *urb;
1291         int retv;
1292         int length = 0; /* shut up GCC */
1293
1294         urb = usb_alloc_urb(0, GFP_NOIO);
1295         if (!urb)
1296                 return -ENOMEM;
1297
1298         usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data,
1299                          len, usb_api_blocking_completion, NULL);
1300
1301         retv = usb_start_wait_urb(urb, timeout, &length);
1302         if (retv < 0) {
1303                 return retv;
1304         }
1305         else {
1306                 return length;
1307         }
1308 }
1309
1310
1311 /****************************************************************
1312  *     kaweth_init
1313  ****************************************************************/
1314 static int __init kaweth_init(void)
1315 {
1316         dbg("Driver loading");
1317         return usb_register(&kaweth_driver);
1318 }
1319
1320 /****************************************************************
1321  *     kaweth_exit
1322  ****************************************************************/
1323 static void __exit kaweth_exit(void)
1324 {
1325         usb_deregister(&kaweth_driver);
1326 }
1327
1328 module_init(kaweth_init);
1329 module_exit(kaweth_exit);
1330
1331
1332
1333
1334
1335
1336
1337
1338