drivers/usb/net/kaweth.c

   1 /****************************************************************
   2  *
   3  *     kaweth.c - driver for KL5KUSB101 based USB->Ethernet
   4  *
   5  *     (c) 2000 Interlan Communications
   6  *     (c) 2000 Stephane Alnet
   7  *     (C) 2001 Brad Hards
   8  *     (C) 2002 Oliver Neukum
   9  *
  10  *     Original author: The Zapman <zapman@interlan.net>
  11  *     Inspired by, and much credit goes to Michael Rothwell
  12  *     <rothwell@interlan.net> for the test equipment, help, and patience
  13  *     Based off of (and with thanks to) Petko Manolov's pegaus.c driver.
  14  *     Also many thanks to Joel Silverman and Ed Surprenant at Kawasaki
  15  *     for providing the firmware and driver resources.
  16  *
  17  *     This program is free software; you can redistribute it and/or
  18  *     modify it under the terms of the GNU General Public License as
  19  *     published by the Free Software Foundation; either version 2, or
  20  *     (at your option) any later version.
  21  *
  22  *     This program is distributed in the hope that it will be useful,
  23  *     but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25  *     GNU General Public License for more details.
  26  *
  27  *     You should have received a copy of the GNU General Public License
  28  *     along with this program; if not, write to the Free Software Foundation,
  29  *     Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  30  *
  31  ****************************************************************/
  32
  33 /* TODO:
  34  * Fix in_interrupt() problem
  35  * Develop test procedures for USB net interfaces
  36  * Run test procedures
  37  * Fix bugs from previous two steps
  38  * Snoop other OSs for any tricks we're not doing
  39  * SMP locking
  40  * Reduce arbitrary timeouts
  41  * Smart multicast support
  42  * Temporary MAC change support
  43  * Tunable SOFs parameter - ioctl()?
  44  * Ethernet stats collection
  45  * Code formatting improvements
  46  */
  47
  48 #include <linux/module.h>
  49 #include <linux/sched.h>
  50 #include <linux/slab.h>
  51 #include <linux/string.h>
  52 #include <linux/init.h>
  53 #include <linux/delay.h>
  54 #include <linux/netdevice.h>
  55 #include <linux/etherdevice.h>
  56 #include <linux/usb.h>
  57 #include <linux/types.h>
  58 #include <linux/ethtool.h>
  59 #include <linux/pci.h>
  60 #include <linux/dma-mapping.h>
  61 #include <linux/wait.h>
  62 #include <asm/uaccess.h>
  63 #include <asm/semaphore.h>
  64 #include <asm/byteorder.h>
  65
  66 #undef DEBUG
  67
  68 #include "kawethfw.h"
  69
  70 #define KAWETH_MTU                      1514
  71 #define KAWETH_BUF_SIZE                 1664
  72 #define KAWETH_TX_TIMEOUT               (5 * HZ)
  73 #define KAWETH_SCRATCH_SIZE             32
  74 #define KAWETH_FIRMWARE_BUF_SIZE        4096
  75 #define KAWETH_CONTROL_TIMEOUT          (30 * HZ)
  76
  77 #define KAWETH_STATUS_BROKEN            0x0000001
  78 #define KAWETH_STATUS_CLOSING           0x0000002
  79 #define KAWETH_STATUS_SUSPENDING        0x0000004
  80
  81 #define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING)
  82
  83 #define KAWETH_PACKET_FILTER_PROMISCUOUS        0x01
  84 #define KAWETH_PACKET_FILTER_ALL_MULTICAST      0x02
  85 #define KAWETH_PACKET_FILTER_DIRECTED           0x04
  86 #define KAWETH_PACKET_FILTER_BROADCAST          0x08
  87 #define KAWETH_PACKET_FILTER_MULTICAST          0x10
  88
  89 /* Table 7 */
  90 #define KAWETH_COMMAND_GET_ETHERNET_DESC        0x00
  91 #define KAWETH_COMMAND_MULTICAST_FILTERS        0x01
  92 #define KAWETH_COMMAND_SET_PACKET_FILTER        0x02
  93 #define KAWETH_COMMAND_STATISTICS               0x03
  94 #define KAWETH_COMMAND_SET_TEMP_MAC             0x06
  95 #define KAWETH_COMMAND_GET_TEMP_MAC             0x07
  96 #define KAWETH_COMMAND_SET_URB_SIZE             0x08
  97 #define KAWETH_COMMAND_SET_SOFS_WAIT            0x09
  98 #define KAWETH_COMMAND_SCAN                     0xFF
  99
 100 #define KAWETH_SOFS_TO_WAIT                     0x05
 101
 102 #define INTBUFFERSIZE                           4
 103
 104 #define STATE_OFFSET                            0
 105 #define STATE_MASK                              0x40
 106 #define STATE_SHIFT                             5
 107
 108 #define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED)
 109
 110
 111 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>");
 112 MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver");
 113 MODULE_LICENSE("GPL");
 114
 115 static const char driver_name[] = "kaweth";
 116
 117 static int kaweth_probe(
 118                 struct usb_interface *intf,
 119                 const struct usb_device_id *id  /* from id_table */
 120         );
 121 static void kaweth_disconnect(struct usb_interface *intf);
 122 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
 123                                        unsigned int pipe,
 124                                        struct usb_ctrlrequest *cmd, void *data,
 125                                        int len, int timeout);
 126 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message);
 127 static int kaweth_resume(struct usb_interface *intf);
 128
 129 /****************************************************************
 130  *     usb_device_id
 131  ****************************************************************/
 132 static struct usb_device_id usb_klsi_table[] = {
 133         { USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */
 134         { USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */
 135         { USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */
 136         { USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */
 137         { USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */
 138         { USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */
 139         { USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */
 140         { USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */
 141         { USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */
 142         { USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */
 143         { USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */
 144         { USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */
 145         { USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */
 146         { USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */
 147         { USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */
 148         { USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */
 149         { USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */
 150         { USB_DEVICE(0x0846, 0x1001) }, /* NetGear EA-101 */
 151         { USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */
 152         { USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */
 153         { USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */
 154         { USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */
 155         { USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */
 156         { USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */
 157         { USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */
 158         { USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */
 159         { USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */
 160         { USB_DEVICE(0x1485, 0x0001) }, /* Silicom U2E */
 161         { USB_DEVICE(0x1485, 0x0002) }, /* Psion Dacom Gold Port Ethernet */
 162         { USB_DEVICE(0x1645, 0x0005) }, /* Entrega E45 */
 163         { USB_DEVICE(0x1645, 0x0008) }, /* Entrega USB Ethernet Adapter */
 164         { USB_DEVICE(0x1645, 0x8005) }, /* PortGear Ethernet Adapter */
 165         { USB_DEVICE(0x1668, 0x0323) }, /* Actiontec USB Ethernet */
 166         { USB_DEVICE(0x2001, 0x4000) }, /* D-link DSB-650C */
 167         {} /* Null terminator */
 168 };
 169
 170 MODULE_DEVICE_TABLE (usb, usb_klsi_table);
 171
 172 /****************************************************************
 173  *     kaweth_driver
 174  ****************************************************************/
 175 static struct usb_driver kaweth_driver = {
 176         .name =         driver_name,
 177         .probe =        kaweth_probe,
 178         .disconnect =   kaweth_disconnect,
 179         .suspend =      kaweth_suspend,
 180         .resume =       kaweth_resume,
 181         .id_table =     usb_klsi_table,
 182         .supports_autosuspend = 1,
 183 };
 184
 185 typedef __u8 eth_addr_t[6];
 186
 187 /****************************************************************
 188  *     usb_eth_dev
 189  ****************************************************************/
 190 struct usb_eth_dev {
 191         char *name;
 192         __u16 vendor;
 193         __u16 device;
 194         void *pdata;
 195 };
 196
 197 /****************************************************************
 198  *     kaweth_ethernet_configuration
 199  *     Refer Table 8
 200  ****************************************************************/
 201 struct kaweth_ethernet_configuration
 202 {
 203         __u8 size;
 204         __u8 reserved1;
 205         __u8 reserved2;
 206         eth_addr_t hw_addr;
 207         __u32 statistics_mask;
 208         __le16 segment_size;
 209         __u16 max_multicast_filters;
 210         __u8 reserved3;
 211 } __attribute__ ((packed));
 212
 213 /****************************************************************
 214  *     kaweth_device
 215  ****************************************************************/
 216 struct kaweth_device
 217 {
 218         spinlock_t device_lock;
 219
 220         __u32 status;
 221         int end;
 222         int suspend_lowmem_rx;
 223         int suspend_lowmem_ctrl;
 224         int linkstate;
 225         int opened;
 226         struct delayed_work lowmem_work;
 227
 228         struct usb_device *dev;
 229         struct usb_interface *intf;
 230         struct net_device *net;
 231         wait_queue_head_t term_wait;
 232
 233         struct urb *rx_urb;
 234         struct urb *tx_urb;
 235         struct urb *irq_urb;
 236
 237         dma_addr_t intbufferhandle;
 238         __u8 *intbuffer;
 239         dma_addr_t rxbufferhandle;
 240         __u8 *rx_buf;
 241
 242
 243         struct sk_buff *tx_skb;
 244
 245         __u8 *firmware_buf;
 246         __u8 scratch[KAWETH_SCRATCH_SIZE];
 247         __u16 packet_filter_bitmap;
 248
 249         struct kaweth_ethernet_configuration configuration;
 250
 251         struct net_device_stats stats;
 252 };
 253
 254
 255 /****************************************************************
 256  *     kaweth_control
 257  ****************************************************************/
 258 static int kaweth_control(struct kaweth_device *kaweth,
 259                           unsigned int pipe,
 260                           __u8 request,
 261                           __u8 requesttype,
 262                           __u16 value,
 263                           __u16 index,
 264                           void *data,
 265                           __u16 size,
 266                           int timeout)
 267 {
 268         struct usb_ctrlrequest *dr;
 269
 270         dbg("kaweth_control()");
 271
 272         if(in_interrupt()) {
 273                 dbg("in_interrupt()");
 274                 return -EBUSY;
 275         }
 276
 277         dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
 278
 279         if (!dr) {
 280                 dbg("kmalloc() failed");
 281                 return -ENOMEM;
 282         }
 283
 284         dr->bRequestType= requesttype;
 285         dr->bRequest = request;
 286         dr->wValue = cpu_to_le16p(&value);
 287         dr->wIndex = cpu_to_le16p(&index);
 288         dr->wLength = cpu_to_le16p(&size);
 289
 290         return kaweth_internal_control_msg(kaweth->dev,
 291                                         pipe,
 292                                         dr,
 293                                         data,
 294                                         size,
 295                                         timeout);
 296 }
 297
 298 /****************************************************************
 299  *     kaweth_read_configuration
 300  ****************************************************************/
 301 static int kaweth_read_configuration(struct kaweth_device *kaweth)
 302 {
 303         int retval;
 304
 305         dbg("Reading kaweth configuration");
 306
 307         retval = kaweth_control(kaweth,
 308                                 usb_rcvctrlpipe(kaweth->dev, 0),
 309                                 KAWETH_COMMAND_GET_ETHERNET_DESC,
 310                                 USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE,
 311                                 0,
 312                                 0,
 313                                 (void *)&kaweth->configuration,
 314                                 sizeof(kaweth->configuration),
 315                                 KAWETH_CONTROL_TIMEOUT);
 316
 317         return retval;
 318 }
 319
 320 /****************************************************************
 321  *     kaweth_set_urb_size
 322  ****************************************************************/
 323 static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size)
 324 {
 325         int retval;
 326
 327         dbg("Setting URB size to %d", (unsigned)urb_size);
 328
 329         retval = kaweth_control(kaweth,
 330                                 usb_sndctrlpipe(kaweth->dev, 0),
 331                                 KAWETH_COMMAND_SET_URB_SIZE,
 332                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 333                                 urb_size,
 334                                 0,
 335                                 (void *)&kaweth->scratch,
 336                                 0,
 337                                 KAWETH_CONTROL_TIMEOUT);
 338
 339         return retval;
 340 }
 341
 342 /****************************************************************
 343  *     kaweth_set_sofs_wait
 344  ****************************************************************/
 345 static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait)
 346 {
 347         int retval;
 348
 349         dbg("Set SOFS wait to %d", (unsigned)sofs_wait);
 350
 351         retval = kaweth_control(kaweth,
 352                                 usb_sndctrlpipe(kaweth->dev, 0),
 353                                 KAWETH_COMMAND_SET_SOFS_WAIT,
 354                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 355                                 sofs_wait,
 356                                 0,
 357                                 (void *)&kaweth->scratch,
 358                                 0,
 359                                 KAWETH_CONTROL_TIMEOUT);
 360
 361         return retval;
 362 }
 363
 364 /****************************************************************
 365  *     kaweth_set_receive_filter
 366  ****************************************************************/
 367 static int kaweth_set_receive_filter(struct kaweth_device *kaweth,
 368                                      __u16 receive_filter)
 369 {
 370         int retval;
 371
 372         dbg("Set receive filter to %d", (unsigned)receive_filter);
 373
 374         retval = kaweth_control(kaweth,
 375                                 usb_sndctrlpipe(kaweth->dev, 0),
 376                                 KAWETH_COMMAND_SET_PACKET_FILTER,
 377                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 378                                 receive_filter,
 379                                 0,
 380                                 (void *)&kaweth->scratch,
 381                                 0,
 382                                 KAWETH_CONTROL_TIMEOUT);
 383
 384         return retval;
 385 }
 386
 387 /****************************************************************
 388  *     kaweth_download_firmware
 389  ****************************************************************/
 390 static int kaweth_download_firmware(struct kaweth_device *kaweth,
 391                                     __u8 *data,
 392                                     __u16 data_len,
 393                                     __u8 interrupt,
 394                                     __u8 type)
 395 {
 396         if(data_len > KAWETH_FIRMWARE_BUF_SIZE) {
 397                 err("Firmware too big: %d", data_len);
 398                 return -ENOSPC;
 399         }
 400
 401         memcpy(kaweth->firmware_buf, data, data_len);
 402
 403         kaweth->firmware_buf[2] = (data_len & 0xFF) - 7;
 404         kaweth->firmware_buf[3] = data_len >> 8;
 405         kaweth->firmware_buf[4] = type;
 406         kaweth->firmware_buf[5] = interrupt;
 407
 408         dbg("High: %i, Low:%i", kaweth->firmware_buf[3],
 409                    kaweth->firmware_buf[2]);
 410
 411         dbg("Downloading firmware at %p to kaweth device at %p",
 412             data,
 413             kaweth);
 414         dbg("Firmware length: %d", data_len);
 415
 416         return kaweth_control(kaweth,
 417                               usb_sndctrlpipe(kaweth->dev, 0),
 418                               KAWETH_COMMAND_SCAN,
 419                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 420                               0,
 421                               0,
 422                               (void *)kaweth->firmware_buf,
 423                               data_len,
 424                               KAWETH_CONTROL_TIMEOUT);
 425 }
 426
 427 /****************************************************************
 428  *     kaweth_trigger_firmware
 429  ****************************************************************/
 430 static int kaweth_trigger_firmware(struct kaweth_device *kaweth,
 431                                    __u8 interrupt)
 432 {
 433         kaweth->firmware_buf[0] = 0xB6;
 434         kaweth->firmware_buf[1] = 0xC3;
 435         kaweth->firmware_buf[2] = 0x01;
 436         kaweth->firmware_buf[3] = 0x00;
 437         kaweth->firmware_buf[4] = 0x06;
 438         kaweth->firmware_buf[5] = interrupt;
 439         kaweth->firmware_buf[6] = 0x00;
 440         kaweth->firmware_buf[7] = 0x00;
 441
 442         dbg("Triggering firmware");
 443
 444         return kaweth_control(kaweth,
 445                               usb_sndctrlpipe(kaweth->dev, 0),
 446                               KAWETH_COMMAND_SCAN,
 447                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 448                               0,
 449                               0,
 450                               (void *)kaweth->firmware_buf,
 451                               8,
 452                               KAWETH_CONTROL_TIMEOUT);
 453 }
 454
 455 /****************************************************************
 456  *     kaweth_reset
 457  ****************************************************************/
 458 static int kaweth_reset(struct kaweth_device *kaweth)
 459 {
 460         int result;
 461
 462         dbg("kaweth_reset(%p)", kaweth);
 463         result = kaweth_control(kaweth,
 464                                 usb_sndctrlpipe(kaweth->dev, 0),
 465                                 USB_REQ_SET_CONFIGURATION,
 466                                 0,
 467                                 kaweth->dev->config[0].desc.bConfigurationValue,
 468                                 0,
 469                                 NULL,
 470                                 0,
 471                                 KAWETH_CONTROL_TIMEOUT);
 472
 473         mdelay(10);
 474
 475         dbg("kaweth_reset() returns %d.",result);
 476
 477         return result;
 478 }
 479
 480 static void kaweth_usb_receive(struct urb *);
 481 static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t);
 482
 483 /****************************************************************
 484         int_callback
 485 *****************************************************************/
 486
 487 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf)
 488 {
 489         int status;
 490
 491         status = usb_submit_urb (kaweth->irq_urb, mf);
 492         if (unlikely(status == -ENOMEM)) {
 493                 kaweth->suspend_lowmem_ctrl = 1;
 494                 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
 495         } else {
 496                 kaweth->suspend_lowmem_ctrl = 0;
 497         }
 498
 499         if (status)
 500                 err ("can't resubmit intr, %s-%s, status %d",
 501                                 kaweth->dev->bus->bus_name,
 502                                 kaweth->dev->devpath, status);
 503 }
 504
 505 static void int_callback(struct urb *u)
 506 {
 507         struct kaweth_device *kaweth = u->context;
 508         int act_state;
 509
 510         switch (u->status) {
 511         case 0:                 /* success */
 512                 break;
 513         case -ECONNRESET:       /* unlink */
 514         case -ENOENT:
 515         case -ESHUTDOWN:
 516                 return;
 517         /* -EPIPE:  should clear the halt */
 518         default:                /* error */
 519                 goto resubmit;
 520         }
 521
 522         /* we check the link state to report changes */
 523         if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) {
 524                 if (act_state)
 525                         netif_carrier_on(kaweth->net);
 526                 else
 527                         netif_carrier_off(kaweth->net);
 528
 529                 kaweth->linkstate = act_state;
 530         }
 531 resubmit:
 532         kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC);
 533 }
 534
 535 static void kaweth_resubmit_tl(struct work_struct *work)
 536 {
 537         struct kaweth_device *kaweth =
 538                 container_of(work, struct kaweth_device, lowmem_work.work);
 539
 540         if (IS_BLOCKED(kaweth->status))
 541                 return;
 542
 543         if (kaweth->suspend_lowmem_rx)
 544                 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
 545
 546         if (kaweth->suspend_lowmem_ctrl)
 547                 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
 548 }
 549
 550
 551 /****************************************************************
 552  *     kaweth_resubmit_rx_urb
 553  ****************************************************************/
 554 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth,
 555                                                 gfp_t mem_flags)
 556 {
 557         int result;
 558
 559         usb_fill_bulk_urb(kaweth->rx_urb,
 560                       kaweth->dev,
 561                       usb_rcvbulkpipe(kaweth->dev, 1),
 562                       kaweth->rx_buf,
 563                       KAWETH_BUF_SIZE,
 564                       kaweth_usb_receive,
 565                       kaweth);
 566         kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 567         kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle;
 568
 569         if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) {
 570                 if (result == -ENOMEM) {
 571                         kaweth->suspend_lowmem_rx = 1;
 572                         schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
 573                 }
 574                 err("resubmitting rx_urb %d failed", result);
 575         } else {
 576                 kaweth->suspend_lowmem_rx = 0;
 577         }
 578
 579         return result;
 580 }
 581
 582 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth);
 583
 584 /****************************************************************
 585  *     kaweth_usb_receive
 586  ****************************************************************/
 587 static void kaweth_usb_receive(struct urb *urb)
 588 {
 589         struct kaweth_device *kaweth = urb->context;
 590         struct net_device *net = kaweth->net;
 591
 592         int count = urb->actual_length;
 593         int count2 = urb->transfer_buffer_length;
 594
 595         __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf);
 596
 597         struct sk_buff *skb;
 598
 599         if(unlikely(urb->status == -ECONNRESET || urb->status == -ESHUTDOWN))
 600         /* we are killed - set a flag and wake the disconnect handler */
 601         {
 602                 kaweth->end = 1;
 603                 wake_up(&kaweth->term_wait);
 604                 return;
 605         }
 606
 607         spin_lock(&kaweth->device_lock);
 608         if (IS_BLOCKED(kaweth->status)) {
 609                 spin_unlock(&kaweth->device_lock);
 610                 return;
 611         }
 612         spin_unlock(&kaweth->device_lock);
 613
 614         if(urb->status && urb->status != -EREMOTEIO && count != 1) {
 615                 err("%s RX status: %d count: %d packet_len: %d",
 616                            net->name,
 617                            urb->status,
 618                            count,
 619                            (int)pkt_len);
 620                 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 621                 return;
 622         }
 623
 624         if(kaweth->net && (count > 2)) {
 625                 if(pkt_len > (count - 2)) {
 626                         err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count);
 627                         err("Packet len & 2047: %x", pkt_len & 2047);
 628                         err("Count 2: %x", count2);
 629                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 630                         return;
 631                 }
 632
 633                 if(!(skb = dev_alloc_skb(pkt_len+2))) {
 634                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 635                         return;
 636                 }
 637
 638                 skb_reserve(skb, 2);    /* Align IP on 16 byte boundaries */
 639
 640                 skb->dev = net;
 641
 642                 eth_copy_and_sum(skb, kaweth->rx_buf + 2, pkt_len, 0);
 643
 644                 skb_put(skb, pkt_len);
 645
 646                 skb->protocol = eth_type_trans(skb, net);
 647
 648                 netif_rx(skb);
 649
 650                 kaweth->stats.rx_packets++;
 651                 kaweth->stats.rx_bytes += pkt_len;
 652         }
 653
 654         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 655 }
 656
 657 /****************************************************************
 658  *     kaweth_open
 659  ****************************************************************/
 660 static int kaweth_open(struct net_device *net)
 661 {
 662         struct kaweth_device *kaweth = netdev_priv(net);
 663         int res;
 664
 665         dbg("Opening network device.");
 666
 667         res = usb_autopm_get_interface(kaweth->intf);
 668         if (res) {
 669                 err("Interface cannot be resumed.");
 670                 return -EIO;
 671         }
 672         res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL);
 673         if (res)
 674                 goto err_out;
 675
 676         usb_fill_int_urb(
 677                 kaweth->irq_urb,
 678                 kaweth->dev,
 679                 usb_rcvintpipe(kaweth->dev, 3),
 680                 kaweth->intbuffer,
 681                 INTBUFFERSIZE,
 682                 int_callback,
 683                 kaweth,
 684                 250); /* overriding the descriptor */
 685         kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle;
 686         kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 687
 688         res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL);
 689         if (res) {
 690                 usb_kill_urb(kaweth->rx_urb);
 691                 goto err_out;
 692         }
 693         kaweth->opened = 1;
 694
 695         netif_start_queue(net);
 696
 697         kaweth_async_set_rx_mode(kaweth);
 698         return 0;
 699
 700 err_out:
 701         usb_autopm_enable(kaweth->intf);
 702         return -EIO;
 703 }
 704
 705 /****************************************************************
 706  *     kaweth_kill_urbs
 707  ****************************************************************/
 708 static void kaweth_kill_urbs(struct kaweth_device *kaweth)
 709 {
 710         usb_kill_urb(kaweth->irq_urb);
 711         usb_kill_urb(kaweth->rx_urb);
 712         usb_kill_urb(kaweth->tx_urb);
 713
 714         flush_scheduled_work();
 715
 716         /* a scheduled work may have resubmitted,
 717            we hit them again */
 718         usb_kill_urb(kaweth->irq_urb);
 719         usb_kill_urb(kaweth->rx_urb);
 720 }
 721
 722 /****************************************************************
 723  *     kaweth_close
 724  ****************************************************************/
 725 static int kaweth_close(struct net_device *net)
 726 {
 727         struct kaweth_device *kaweth = netdev_priv(net);
 728
 729         netif_stop_queue(net);
 730         kaweth->opened = 0;
 731
 732         kaweth->status |= KAWETH_STATUS_CLOSING;
 733
 734         kaweth_kill_urbs(kaweth);
 735
 736         kaweth->status &= ~KAWETH_STATUS_CLOSING;
 737
 738         usb_autopm_enable(kaweth->intf);
 739
 740         return 0;
 741 }
 742
 743 static void kaweth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
 744 {
 745         struct kaweth_device *kaweth = netdev_priv(dev);
 746
 747         strlcpy(info->driver, driver_name, sizeof(info->driver));
 748         usb_make_path(kaweth->dev, info->bus_info, sizeof (info->bus_info));
 749 }
 750
 751 static u32 kaweth_get_link(struct net_device *dev)
 752 {
 753         struct kaweth_device *kaweth = netdev_priv(dev);
 754
 755         return kaweth->linkstate;
 756 }
 757
 758 static struct ethtool_ops ops = {
 759         .get_drvinfo    = kaweth_get_drvinfo,
 760         .get_link       = kaweth_get_link
 761 };
 762
 763 /****************************************************************
 764  *     kaweth_usb_transmit_complete
 765  ****************************************************************/
 766 static void kaweth_usb_transmit_complete(struct urb *urb)
 767 {
 768         struct kaweth_device *kaweth = urb->context;
 769         struct sk_buff *skb = kaweth->tx_skb;
 770
 771         if (unlikely(urb->status != 0))
 772                 if (urb->status != -ENOENT)
 773                         dbg("%s: TX status %d.", kaweth->net->name, urb->status);
 774
 775         netif_wake_queue(kaweth->net);
 776         dev_kfree_skb_irq(skb);
 777 }
 778
 779 /****************************************************************
 780  *     kaweth_start_xmit
 781  ****************************************************************/
 782 static int kaweth_start_xmit(struct sk_buff *skb, struct net_device *net)
 783 {
 784         struct kaweth_device *kaweth = netdev_priv(net);
 785         __le16 *private_header;
 786
 787         int res;
 788
 789         spin_lock(&kaweth->device_lock);
 790
 791         kaweth_async_set_rx_mode(kaweth);
 792         netif_stop_queue(net);
 793         if (IS_BLOCKED(kaweth->status)) {
 794                 goto skip;
 795         }
 796
 797         /* We now decide whether we can put our special header into the sk_buff */
 798         if (skb_cloned(skb) || skb_headroom(skb) < 2) {
 799                 /* no such luck - we make our own */
 800                 struct sk_buff *copied_skb;
 801                 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC);
 802                 dev_kfree_skb_irq(skb);
 803                 skb = copied_skb;
 804                 if (!copied_skb) {
 805                         kaweth->stats.tx_errors++;
 806                         netif_start_queue(net);
 807                         spin_unlock(&kaweth->device_lock);
 808                         return 0;
 809                 }
 810         }
 811
 812         private_header = (__le16 *)__skb_push(skb, 2);
 813         *private_header = cpu_to_le16(skb->len-2);
 814         kaweth->tx_skb = skb;
 815
 816         usb_fill_bulk_urb(kaweth->tx_urb,
 817                       kaweth->dev,
 818                       usb_sndbulkpipe(kaweth->dev, 2),
 819                       private_header,
 820                       skb->len,
 821                       kaweth_usb_transmit_complete,
 822                       kaweth);
 823         kaweth->end = 0;
 824
 825         if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
 826         {
 827                 warn("kaweth failed tx_urb %d", res);
 828 skip:
 829                 kaweth->stats.tx_errors++;
 830
 831                 netif_start_queue(net);
 832                 dev_kfree_skb_irq(skb);
 833         }
 834         else
 835         {
 836                 kaweth->stats.tx_packets++;
 837                 kaweth->stats.tx_bytes += skb->len;
 838                 net->trans_start = jiffies;
 839         }
 840
 841         spin_unlock(&kaweth->device_lock);
 842
 843         return 0;
 844 }
 845
 846 /****************************************************************
 847  *     kaweth_set_rx_mode
 848  ****************************************************************/
 849 static void kaweth_set_rx_mode(struct net_device *net)
 850 {
 851         struct kaweth_device *kaweth = netdev_priv(net);
 852
 853         __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
 854                                      KAWETH_PACKET_FILTER_BROADCAST |
 855                                      KAWETH_PACKET_FILTER_MULTICAST;
 856
 857         dbg("Setting Rx mode to %d", packet_filter_bitmap);
 858
 859         netif_stop_queue(net);
 860
 861         if (net->flags & IFF_PROMISC) {
 862                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
 863         }
 864         else if ((net->mc_count) || (net->flags & IFF_ALLMULTI)) {
 865                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
 866         }
 867
 868         kaweth->packet_filter_bitmap = packet_filter_bitmap;
 869         netif_wake_queue(net);
 870 }
 871
 872 /****************************************************************
 873  *     kaweth_async_set_rx_mode
 874  ****************************************************************/
 875 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
 876 {
 877         __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
 878         kaweth->packet_filter_bitmap = 0;
 879         if (packet_filter_bitmap == 0)
 880                 return;
 881
 882         {
 883         int result;
 884         result = kaweth_control(kaweth,
 885                                 usb_sndctrlpipe(kaweth->dev, 0),
 886                                 KAWETH_COMMAND_SET_PACKET_FILTER,
 887                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 888                                 packet_filter_bitmap,
 889                                 0,
 890                                 (void *)&kaweth->scratch,
 891                                 0,
 892                                 KAWETH_CONTROL_TIMEOUT);
 893
 894         if(result < 0) {
 895                 err("Failed to set Rx mode: %d", result);
 896         }
 897         else {
 898                 dbg("Set Rx mode to %d", packet_filter_bitmap);
 899         }
 900         }
 901 }
 902
 903 /****************************************************************
 904  *     kaweth_netdev_stats
 905  ****************************************************************/
 906 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev)
 907 {
 908         struct kaweth_device *kaweth = netdev_priv(dev);
 909         return &kaweth->stats;
 910 }
 911
 912 /****************************************************************
 913  *     kaweth_tx_timeout
 914  ****************************************************************/
 915 static void kaweth_tx_timeout(struct net_device *net)
 916 {
 917         struct kaweth_device *kaweth = netdev_priv(net);
 918
 919         warn("%s: Tx timed out. Resetting.", net->name);
 920         kaweth->stats.tx_errors++;
 921         net->trans_start = jiffies;
 922
 923         usb_unlink_urb(kaweth->tx_urb);
 924 }
 925
 926 /****************************************************************
 927  *     kaweth_suspend
 928  ****************************************************************/
 929 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message)
 930 {
 931         struct kaweth_device *kaweth = usb_get_intfdata(intf);
 932         unsigned long flags;
 933
 934         dbg("Suspending device");
 935         spin_lock_irqsave(&kaweth->device_lock, flags);
 936         kaweth->status |= KAWETH_STATUS_SUSPENDING;
 937         spin_unlock_irqrestore(&kaweth->device_lock, flags);
 938
 939         kaweth_kill_urbs(kaweth);
 940         return 0;
 941 }
 942
 943 /****************************************************************
 944  *     kaweth_resume
 945  ****************************************************************/
 946 static int kaweth_resume(struct usb_interface *intf)
 947 {
 948         struct kaweth_device *kaweth = usb_get_intfdata(intf);
 949         unsigned long flags;
 950
 951         dbg("Resuming device");
 952         spin_lock_irqsave(&kaweth->device_lock, flags);
 953         kaweth->status &= ~KAWETH_STATUS_SUSPENDING;
 954         spin_unlock_irqrestore(&kaweth->device_lock, flags);
 955
 956         if (!kaweth->opened)
 957                 return 0;
 958         kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
 959         kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
 960
 961         return 0;
 962 }
 963
 964 /****************************************************************
 965  *     kaweth_probe
 966  ****************************************************************/
 967 static int kaweth_probe(
 968                 struct usb_interface *intf,
 969                 const struct usb_device_id *id      /* from id_table */
 970         )
 971 {
 972         struct usb_device *dev = interface_to_usbdev(intf);
 973         struct kaweth_device *kaweth;
 974         struct net_device *netdev;
 975         const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 976         int result = 0;
 977
 978         dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x",
 979                  dev->devnum,
 980                  le16_to_cpu(dev->descriptor.idVendor),
 981                  le16_to_cpu(dev->descriptor.idProduct),
 982                  le16_to_cpu(dev->descriptor.bcdDevice));
 983
 984         dbg("Device at %p", dev);
 985
 986         dbg("Descriptor length: %x type: %x",
 987                  (int)dev->descriptor.bLength,
 988                  (int)dev->descriptor.bDescriptorType);
 989
 990         netdev = alloc_etherdev(sizeof(*kaweth));
 991         if (!netdev)
 992                 return -ENOMEM;
 993
 994         kaweth = netdev_priv(netdev);
 995         kaweth->dev = dev;
 996         kaweth->net = netdev;
 997
 998         spin_lock_init(&kaweth->device_lock);
 999         init_waitqueue_head(&kaweth->term_wait);
1000
1001         dbg("Resetting.");
1002
1003         kaweth_reset(kaweth);
1004
1005         /*
1006          * If high byte of bcdDevice is nonzero, firmware is already
1007          * downloaded. Don't try to do it again, or we'll hang the device.
1008          */
1009
1010         if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) {
1011                 info("Firmware present in device.");
1012         } else {
1013                 /* Download the firmware */
1014                 info("Downloading firmware...");
1015                 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
1016                 if ((result = kaweth_download_firmware(kaweth,
1017                                                       kaweth_new_code,
1018                                                       len_kaweth_new_code,
1019                                                       100,
1020                                                       2)) < 0) {
1021                         err("Error downloading firmware (%d)", result);
1022                         goto err_fw;
1023                 }
1024
1025                 if ((result = kaweth_download_firmware(kaweth,
1026                                                       kaweth_new_code_fix,
1027                                                       len_kaweth_new_code_fix,
1028                                                       100,
1029                                                       3)) < 0) {
1030                         err("Error downloading firmware fix (%d)", result);
1031                         goto err_fw;
1032                 }
1033
1034                 if ((result = kaweth_download_firmware(kaweth,
1035                                                       kaweth_trigger_code,
1036                                                       len_kaweth_trigger_code,
1037                                                       126,
1038                                                       2)) < 0) {
1039                         err("Error downloading trigger code (%d)", result);
1040                         goto err_fw;
1041
1042                 }
1043
1044                 if ((result = kaweth_download_firmware(kaweth,
1045                                                       kaweth_trigger_code_fix,
1046                                                       len_kaweth_trigger_code_fix,
1047                                                       126,
1048                                                       3)) < 0) {
1049                         err("Error downloading trigger code fix (%d)", result);
1050                         goto err_fw;
1051                 }
1052
1053
1054                 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
1055                         err("Error triggering firmware (%d)", result);
1056                         goto err_fw;
1057                 }
1058
1059                 /* Device will now disappear for a moment...  */
1060                 info("Firmware loaded.  I'll be back...");
1061 err_fw:
1062                 free_page((unsigned long)kaweth->firmware_buf);
1063                 free_netdev(netdev);
1064                 return -EIO;
1065         }
1066
1067         result = kaweth_read_configuration(kaweth);
1068
1069         if(result < 0) {
1070                 err("Error reading configuration (%d), no net device created", result);
1071                 goto err_free_netdev;
1072         }
1073
1074         info("Statistics collection: %x", kaweth->configuration.statistics_mask);
1075         info("Multicast filter limit: %x", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
1076         info("MTU: %d", le16_to_cpu(kaweth->configuration.segment_size));
1077         info("Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
1078                  (int)kaweth->configuration.hw_addr[0],
1079                  (int)kaweth->configuration.hw_addr[1],
1080                  (int)kaweth->configuration.hw_addr[2],
1081                  (int)kaweth->configuration.hw_addr[3],
1082                  (int)kaweth->configuration.hw_addr[4],
1083                  (int)kaweth->configuration.hw_addr[5]);
1084
1085         if(!memcmp(&kaweth->configuration.hw_addr,
1086                    &bcast_addr,
1087                    sizeof(bcast_addr))) {
1088                 err("Firmware not functioning properly, no net device created");
1089                 goto err_free_netdev;
1090         }
1091
1092         if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
1093                 dbg("Error setting URB size");
1094                 goto err_free_netdev;
1095         }
1096
1097         if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
1098                 err("Error setting SOFS wait");
1099                 goto err_free_netdev;
1100         }
1101
1102         result = kaweth_set_receive_filter(kaweth,
1103                                            KAWETH_PACKET_FILTER_DIRECTED |
1104                                            KAWETH_PACKET_FILTER_BROADCAST |
1105                                            KAWETH_PACKET_FILTER_MULTICAST);
1106
1107         if(result < 0) {
1108                 err("Error setting receive filter");
1109                 goto err_free_netdev;
1110         }
1111
1112         dbg("Initializing net device.");
1113
1114         kaweth->intf = intf;
1115
1116         kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1117         if (!kaweth->tx_urb)
1118                 goto err_free_netdev;
1119         kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1120         if (!kaweth->rx_urb)
1121                 goto err_only_tx;
1122         kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1123         if (!kaweth->irq_urb)
1124                 goto err_tx_and_rx;
1125
1126         kaweth->intbuffer = usb_buffer_alloc(   kaweth->dev,
1127                                                 INTBUFFERSIZE,
1128                                                 GFP_KERNEL,
1129                                                 &kaweth->intbufferhandle);
1130         if (!kaweth->intbuffer)
1131                 goto err_tx_and_rx_and_irq;
1132         kaweth->rx_buf = usb_buffer_alloc(      kaweth->dev,
1133                                                 KAWETH_BUF_SIZE,
1134                                                 GFP_KERNEL,
1135                                                 &kaweth->rxbufferhandle);
1136         if (!kaweth->rx_buf)
1137                 goto err_all_but_rxbuf;
1138
1139         memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr));
1140         memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr,
1141                sizeof(kaweth->configuration.hw_addr));
1142
1143         netdev->open = kaweth_open;
1144         netdev->stop = kaweth_close;
1145
1146         netdev->watchdog_timeo = KAWETH_TX_TIMEOUT;
1147         netdev->tx_timeout = kaweth_tx_timeout;
1148
1149         netdev->hard_start_xmit = kaweth_start_xmit;
1150         netdev->set_multicast_list = kaweth_set_rx_mode;
1151         netdev->get_stats = kaweth_netdev_stats;
1152         netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size);
1153         SET_ETHTOOL_OPS(netdev, &ops);
1154
1155         /* kaweth is zeroed as part of alloc_netdev */
1156
1157         INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl);
1158
1159         SET_MODULE_OWNER(netdev);
1160
1161         usb_set_intfdata(intf, kaweth);
1162
1163 #if 0
1164 // dma_supported() is deeply broken on almost all architectures
1165         if (dma_supported (&intf->dev, 0xffffffffffffffffULL))
1166                 kaweth->net->features |= NETIF_F_HIGHDMA;
1167 #endif
1168
1169         SET_NETDEV_DEV(netdev, &intf->dev);
1170         if (register_netdev(netdev) != 0) {
1171                 err("Error registering netdev.");
1172                 goto err_intfdata;
1173         }
1174
1175         info("kaweth interface created at %s", kaweth->net->name);
1176
1177         dbg("Kaweth probe returning.");
1178
1179         return 0;
1180
1181 err_intfdata:
1182         usb_set_intfdata(intf, NULL);
1183         usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1184 err_all_but_rxbuf:
1185         usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1186 err_tx_and_rx_and_irq:
1187         usb_free_urb(kaweth->irq_urb);
1188 err_tx_and_rx:
1189         usb_free_urb(kaweth->rx_urb);
1190 err_only_tx:
1191         usb_free_urb(kaweth->tx_urb);
1192 err_free_netdev:
1193         free_netdev(netdev);
1194
1195         return -EIO;
1196 }
1197
1198 /****************************************************************
1199  *     kaweth_disconnect
1200  ****************************************************************/
1201 static void kaweth_disconnect(struct usb_interface *intf)
1202 {
1203         struct kaweth_device *kaweth = usb_get_intfdata(intf);
1204         struct net_device *netdev;
1205
1206         info("Unregistering");
1207
1208         usb_set_intfdata(intf, NULL);
1209         if (!kaweth) {
1210                 warn("unregistering non-existant device");
1211                 return;
1212         }
1213         netdev = kaweth->net;
1214
1215         dbg("Unregistering net device");
1216         unregister_netdev(netdev);
1217
1218         usb_free_urb(kaweth->rx_urb);
1219         usb_free_urb(kaweth->tx_urb);
1220         usb_free_urb(kaweth->irq_urb);
1221
1222         usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1223         usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1224
1225         free_netdev(netdev);
1226 }
1227
1228
1229 // FIXME this completion stuff is a modified clone of
1230 // an OLD version of some stuff in usb.c ...
1231 struct usb_api_data {
1232         wait_queue_head_t wqh;
1233         int done;
1234 };
1235
1236 /*-------------------------------------------------------------------*
1237  * completion handler for compatibility wrappers (sync control/bulk) *
1238  *-------------------------------------------------------------------*/
1239 static void usb_api_blocking_completion(struct urb *urb)
1240 {
1241         struct usb_api_data *awd = (struct usb_api_data *)urb->context;
1242
1243         awd->done=1;
1244         wake_up(&awd->wqh);
1245 }
1246
1247 /*-------------------------------------------------------------------*
1248  *                         COMPATIBILITY STUFF                       *
1249  *-------------------------------------------------------------------*/
1250
1251 // Starts urb and waits for completion or timeout
1252 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
1253 {
1254         struct usb_api_data awd;
1255         int status;
1256
1257         init_waitqueue_head(&awd.wqh);
1258         awd.done = 0;
1259
1260         urb->context = &awd;
1261         status = usb_submit_urb(urb, GFP_NOIO);
1262         if (status) {
1263                 // something went wrong
1264                 usb_free_urb(urb);
1265                 return status;
1266         }
1267
1268         if (!wait_event_timeout(awd.wqh, awd.done, timeout)) {
1269                 // timeout
1270                 warn("usb_control/bulk_msg: timeout");
1271                 usb_kill_urb(urb);  // remove urb safely
1272                 status = -ETIMEDOUT;
1273         }
1274         else {
1275                 status = urb->status;
1276         }
1277
1278         if (actual_length) {
1279                 *actual_length = urb->actual_length;
1280         }
1281
1282         usb_free_urb(urb);
1283         return status;
1284 }
1285
1286 /*-------------------------------------------------------------------*/
1287 // returns status (negative) or length (positive)
1288 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
1289                                        unsigned int pipe,
1290                                        struct usb_ctrlrequest *cmd, void *data,
1291                                        int len, int timeout)
1292 {
1293         struct urb *urb;
1294         int retv;
1295         int length = 0; /* shut up GCC */
1296
1297         urb = usb_alloc_urb(0, GFP_NOIO);
1298         if (!urb)
1299                 return -ENOMEM;
1300
1301         usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data,
1302                          len, usb_api_blocking_completion, NULL);
1303
1304         retv = usb_start_wait_urb(urb, timeout, &length);
1305         if (retv < 0) {
1306                 return retv;
1307         }
1308         else {
1309                 return length;
1310         }
1311 }
1312
1313
1314 /****************************************************************
1315  *     kaweth_init
1316  ****************************************************************/
1317 static int __init kaweth_init(void)
1318 {
1319         dbg("Driver loading");
1320         return usb_register(&kaweth_driver);
1321 }
1322
1323 /****************************************************************
1324  *     kaweth_exit
1325  ****************************************************************/
1326 static void __exit kaweth_exit(void)
1327 {
1328         usb_deregister(&kaweth_driver);
1329 }
1330
1331 module_init(kaweth_init);
1332 module_exit(kaweth_exit);
1333
1334
1335
1336
1337
1338
1339
1340
1341