SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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 };
 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 work_struct lowmem_work;
 226
 227         struct usb_device *dev;
 228         struct net_device *net;
 229         wait_queue_head_t term_wait;
 230
 231         struct urb *rx_urb;
 232         struct urb *tx_urb;
 233         struct urb *irq_urb;
 234
 235         dma_addr_t intbufferhandle;
 236         __u8 *intbuffer;
 237         dma_addr_t rxbufferhandle;
 238         __u8 *rx_buf;
 239
 240
 241         struct sk_buff *tx_skb;
 242
 243         __u8 *firmware_buf;
 244         __u8 scratch[KAWETH_SCRATCH_SIZE];
 245         __u16 packet_filter_bitmap;
 246
 247         struct kaweth_ethernet_configuration configuration;
 248
 249         struct net_device_stats stats;
 250 };
 251
 252
 253 /****************************************************************
 254  *     kaweth_control
 255  ****************************************************************/
 256 static int kaweth_control(struct kaweth_device *kaweth,
 257                           unsigned int pipe,
 258                           __u8 request,
 259                           __u8 requesttype,
 260                           __u16 value,
 261                           __u16 index,
 262                           void *data,
 263                           __u16 size,
 264                           int timeout)
 265 {
 266         struct usb_ctrlrequest *dr;
 267
 268         dbg("kaweth_control()");
 269
 270         if(in_interrupt()) {
 271                 dbg("in_interrupt()");
 272                 return -EBUSY;
 273         }
 274
 275         dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
 276
 277         if (!dr) {
 278                 dbg("kmalloc() failed");
 279                 return -ENOMEM;
 280         }
 281
 282         dr->bRequestType= requesttype;
 283         dr->bRequest = request;
 284         dr->wValue = cpu_to_le16p(&value);
 285         dr->wIndex = cpu_to_le16p(&index);
 286         dr->wLength = cpu_to_le16p(&size);
 287
 288         return kaweth_internal_control_msg(kaweth->dev,
 289                                         pipe,
 290                                         dr,
 291                                         data,
 292                                         size,
 293                                         timeout);
 294 }
 295
 296 /****************************************************************
 297  *     kaweth_read_configuration
 298  ****************************************************************/
 299 static int kaweth_read_configuration(struct kaweth_device *kaweth)
 300 {
 301         int retval;
 302
 303         dbg("Reading kaweth configuration");
 304
 305         retval = kaweth_control(kaweth,
 306                                 usb_rcvctrlpipe(kaweth->dev, 0),
 307                                 KAWETH_COMMAND_GET_ETHERNET_DESC,
 308                                 USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE,
 309                                 0,
 310                                 0,
 311                                 (void *)&kaweth->configuration,
 312                                 sizeof(kaweth->configuration),
 313                                 KAWETH_CONTROL_TIMEOUT);
 314
 315         return retval;
 316 }
 317
 318 /****************************************************************
 319  *     kaweth_set_urb_size
 320  ****************************************************************/
 321 static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size)
 322 {
 323         int retval;
 324
 325         dbg("Setting URB size to %d", (unsigned)urb_size);
 326
 327         retval = kaweth_control(kaweth,
 328                                 usb_sndctrlpipe(kaweth->dev, 0),
 329                                 KAWETH_COMMAND_SET_URB_SIZE,
 330                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 331                                 urb_size,
 332                                 0,
 333                                 (void *)&kaweth->scratch,
 334                                 0,
 335                                 KAWETH_CONTROL_TIMEOUT);
 336
 337         return retval;
 338 }
 339
 340 /****************************************************************
 341  *     kaweth_set_sofs_wait
 342  ****************************************************************/
 343 static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait)
 344 {
 345         int retval;
 346
 347         dbg("Set SOFS wait to %d", (unsigned)sofs_wait);
 348
 349         retval = kaweth_control(kaweth,
 350                                 usb_sndctrlpipe(kaweth->dev, 0),
 351                                 KAWETH_COMMAND_SET_SOFS_WAIT,
 352                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 353                                 sofs_wait,
 354                                 0,
 355                                 (void *)&kaweth->scratch,
 356                                 0,
 357                                 KAWETH_CONTROL_TIMEOUT);
 358
 359         return retval;
 360 }
 361
 362 /****************************************************************
 363  *     kaweth_set_receive_filter
 364  ****************************************************************/
 365 static int kaweth_set_receive_filter(struct kaweth_device *kaweth,
 366                                      __u16 receive_filter)
 367 {
 368         int retval;
 369
 370         dbg("Set receive filter to %d", (unsigned)receive_filter);
 371
 372         retval = kaweth_control(kaweth,
 373                                 usb_sndctrlpipe(kaweth->dev, 0),
 374                                 KAWETH_COMMAND_SET_PACKET_FILTER,
 375                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 376                                 receive_filter,
 377                                 0,
 378                                 (void *)&kaweth->scratch,
 379                                 0,
 380                                 KAWETH_CONTROL_TIMEOUT);
 381
 382         return retval;
 383 }
 384
 385 /****************************************************************
 386  *     kaweth_download_firmware
 387  ****************************************************************/
 388 static int kaweth_download_firmware(struct kaweth_device *kaweth,
 389                                     __u8 *data,
 390                                     __u16 data_len,
 391                                     __u8 interrupt,
 392                                     __u8 type)
 393 {
 394         if(data_len > KAWETH_FIRMWARE_BUF_SIZE) {
 395                 err("Firmware too big: %d", data_len);
 396                 return -ENOSPC;
 397         }
 398
 399         memcpy(kaweth->firmware_buf, data, data_len);
 400
 401         kaweth->firmware_buf[2] = (data_len & 0xFF) - 7;
 402         kaweth->firmware_buf[3] = data_len >> 8;
 403         kaweth->firmware_buf[4] = type;
 404         kaweth->firmware_buf[5] = interrupt;
 405
 406         dbg("High: %i, Low:%i", kaweth->firmware_buf[3],
 407                    kaweth->firmware_buf[2]);
 408
 409         dbg("Downloading firmware at %p to kaweth device at %p",
 410             data,
 411             kaweth);
 412         dbg("Firmware length: %d", data_len);
 413
 414         return kaweth_control(kaweth,
 415                               usb_sndctrlpipe(kaweth->dev, 0),
 416                               KAWETH_COMMAND_SCAN,
 417                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 418                               0,
 419                               0,
 420                               (void *)kaweth->firmware_buf,
 421                               data_len,
 422                               KAWETH_CONTROL_TIMEOUT);
 423 }
 424
 425 /****************************************************************
 426  *     kaweth_trigger_firmware
 427  ****************************************************************/
 428 static int kaweth_trigger_firmware(struct kaweth_device *kaweth,
 429                                    __u8 interrupt)
 430 {
 431         kaweth->firmware_buf[0] = 0xB6;
 432         kaweth->firmware_buf[1] = 0xC3;
 433         kaweth->firmware_buf[2] = 0x01;
 434         kaweth->firmware_buf[3] = 0x00;
 435         kaweth->firmware_buf[4] = 0x06;
 436         kaweth->firmware_buf[5] = interrupt;
 437         kaweth->firmware_buf[6] = 0x00;
 438         kaweth->firmware_buf[7] = 0x00;
 439
 440         dbg("Triggering firmware");
 441
 442         return kaweth_control(kaweth,
 443                               usb_sndctrlpipe(kaweth->dev, 0),
 444                               KAWETH_COMMAND_SCAN,
 445                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 446                               0,
 447                               0,
 448                               (void *)kaweth->firmware_buf,
 449                               8,
 450                               KAWETH_CONTROL_TIMEOUT);
 451 }
 452
 453 /****************************************************************
 454  *     kaweth_reset
 455  ****************************************************************/
 456 static int kaweth_reset(struct kaweth_device *kaweth)
 457 {
 458         int result;
 459
 460         dbg("kaweth_reset(%p)", kaweth);
 461         result = kaweth_control(kaweth,
 462                                 usb_sndctrlpipe(kaweth->dev, 0),
 463                                 USB_REQ_SET_CONFIGURATION,
 464                                 0,
 465                                 kaweth->dev->config[0].desc.bConfigurationValue,
 466                                 0,
 467                                 NULL,
 468                                 0,
 469                                 KAWETH_CONTROL_TIMEOUT);
 470
 471         mdelay(10);
 472
 473         dbg("kaweth_reset() returns %d.",result);
 474
 475         return result;
 476 }
 477
 478 static void kaweth_usb_receive(struct urb *);
 479 static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t);
 480
 481 /****************************************************************
 482         int_callback
 483 *****************************************************************/
 484
 485 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf)
 486 {
 487         int status;
 488
 489         status = usb_submit_urb (kaweth->irq_urb, mf);
 490         if (unlikely(status == -ENOMEM)) {
 491                 kaweth->suspend_lowmem_ctrl = 1;
 492                 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
 493         } else {
 494                 kaweth->suspend_lowmem_ctrl = 0;
 495         }
 496
 497         if (status)
 498                 err ("can't resubmit intr, %s-%s, status %d",
 499                                 kaweth->dev->bus->bus_name,
 500                                 kaweth->dev->devpath, status);
 501 }
 502
 503 static void int_callback(struct urb *u)
 504 {
 505         struct kaweth_device *kaweth = u->context;
 506         int act_state;
 507
 508         switch (u->status) {
 509         case 0:                 /* success */
 510                 break;
 511         case -ECONNRESET:       /* unlink */
 512         case -ENOENT:
 513         case -ESHUTDOWN:
 514                 return;
 515         /* -EPIPE:  should clear the halt */
 516         default:                /* error */
 517                 goto resubmit;
 518         }
 519
 520         /* we check the link state to report changes */
 521         if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) {
 522                 if (act_state)
 523                         netif_carrier_on(kaweth->net);
 524                 else
 525                         netif_carrier_off(kaweth->net);
 526
 527                 kaweth->linkstate = act_state;
 528         }
 529 resubmit:
 530         kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC);
 531 }
 532
 533 static void kaweth_resubmit_tl(void *d)
 534 {
 535         struct kaweth_device *kaweth = (struct kaweth_device *)d;
 536
 537         if (IS_BLOCKED(kaweth->status))
 538                 return;
 539
 540         if (kaweth->suspend_lowmem_rx)
 541                 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
 542
 543         if (kaweth->suspend_lowmem_ctrl)
 544                 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
 545 }
 546
 547
 548 /****************************************************************
 549  *     kaweth_resubmit_rx_urb
 550  ****************************************************************/
 551 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth,
 552                                                 gfp_t mem_flags)
 553 {
 554         int result;
 555
 556         usb_fill_bulk_urb(kaweth->rx_urb,
 557                       kaweth->dev,
 558                       usb_rcvbulkpipe(kaweth->dev, 1),
 559                       kaweth->rx_buf,
 560                       KAWETH_BUF_SIZE,
 561                       kaweth_usb_receive,
 562                       kaweth);
 563         kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 564         kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle;
 565
 566         if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) {
 567                 if (result == -ENOMEM) {
 568                         kaweth->suspend_lowmem_rx = 1;
 569                         schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
 570                 }
 571                 err("resubmitting rx_urb %d failed", result);
 572         } else {
 573                 kaweth->suspend_lowmem_rx = 0;
 574         }
 575
 576         return result;
 577 }
 578
 579 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth);
 580
 581 /****************************************************************
 582  *     kaweth_usb_receive
 583  ****************************************************************/
 584 static void kaweth_usb_receive(struct urb *urb)
 585 {
 586         struct kaweth_device *kaweth = urb->context;
 587         struct net_device *net = kaweth->net;
 588
 589         int count = urb->actual_length;
 590         int count2 = urb->transfer_buffer_length;
 591
 592         __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf);
 593
 594         struct sk_buff *skb;
 595
 596         if(unlikely(urb->status == -ECONNRESET || urb->status == -ESHUTDOWN))
 597         /* we are killed - set a flag and wake the disconnect handler */
 598         {
 599                 kaweth->end = 1;
 600                 wake_up(&kaweth->term_wait);
 601                 return;
 602         }
 603
 604         spin_lock(&kaweth->device_lock);
 605         if (IS_BLOCKED(kaweth->status)) {
 606                 spin_unlock(&kaweth->device_lock);
 607                 return;
 608         }
 609         spin_unlock(&kaweth->device_lock);
 610
 611         if(urb->status && urb->status != -EREMOTEIO && count != 1) {
 612                 err("%s RX status: %d count: %d packet_len: %d",
 613                            net->name,
 614                            urb->status,
 615                            count,
 616                            (int)pkt_len);
 617                 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 618                 return;
 619         }
 620
 621         if(kaweth->net && (count > 2)) {
 622                 if(pkt_len > (count - 2)) {
 623                         err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count);
 624                         err("Packet len & 2047: %x", pkt_len & 2047);
 625                         err("Count 2: %x", count2);
 626                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 627                         return;
 628                 }
 629
 630                 if(!(skb = dev_alloc_skb(pkt_len+2))) {
 631                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 632                         return;
 633                 }
 634
 635                 skb_reserve(skb, 2);    /* Align IP on 16 byte boundaries */
 636
 637                 skb->dev = net;
 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 = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL);
 665         if (res)
 666                 return -EIO;
 667
 668         usb_fill_int_urb(
 669                 kaweth->irq_urb,
 670                 kaweth->dev,
 671                 usb_rcvintpipe(kaweth->dev, 3),
 672                 kaweth->intbuffer,
 673                 INTBUFFERSIZE,
 674                 int_callback,
 675                 kaweth,
 676                 250); /* overriding the descriptor */
 677         kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle;
 678         kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 679
 680         res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL);
 681         if (res) {
 682                 usb_kill_urb(kaweth->rx_urb);
 683                 return -EIO;
 684         }
 685         kaweth->opened = 1;
 686
 687         netif_start_queue(net);
 688
 689         kaweth_async_set_rx_mode(kaweth);
 690         return 0;
 691 }
 692
 693 /****************************************************************
 694  *     kaweth_close
 695  ****************************************************************/
 696 static void kaweth_kill_urbs(struct kaweth_device *kaweth)
 697 {
 698         usb_kill_urb(kaweth->irq_urb);
 699         usb_kill_urb(kaweth->rx_urb);
 700         usb_kill_urb(kaweth->tx_urb);
 701
 702         flush_scheduled_work();
 703
 704         /* a scheduled work may have resubmitted,
 705            we hit them again */
 706         usb_kill_urb(kaweth->irq_urb);
 707         usb_kill_urb(kaweth->rx_urb);
 708 }
 709
 710 /****************************************************************
 711  *     kaweth_close
 712  ****************************************************************/
 713 static int kaweth_close(struct net_device *net)
 714 {
 715         struct kaweth_device *kaweth = netdev_priv(net);
 716
 717         netif_stop_queue(net);
 718         kaweth->opened = 0;
 719
 720         kaweth->status |= KAWETH_STATUS_CLOSING;
 721
 722         kaweth_kill_urbs(kaweth);
 723
 724         kaweth->status &= ~KAWETH_STATUS_CLOSING;
 725
 726         return 0;
 727 }
 728
 729 static void kaweth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
 730 {
 731
 732         strlcpy(info->driver, driver_name, sizeof(info->driver));
 733 }
 734
 735 static struct ethtool_ops ops = {
 736         .get_drvinfo = kaweth_get_drvinfo
 737 };
 738
 739 /****************************************************************
 740  *     kaweth_usb_transmit_complete
 741  ****************************************************************/
 742 static void kaweth_usb_transmit_complete(struct urb *urb)
 743 {
 744         struct kaweth_device *kaweth = urb->context;
 745         struct sk_buff *skb = kaweth->tx_skb;
 746
 747         if (unlikely(urb->status != 0))
 748                 if (urb->status != -ENOENT)
 749                         dbg("%s: TX status %d.", kaweth->net->name, urb->status);
 750
 751         netif_wake_queue(kaweth->net);
 752         dev_kfree_skb_irq(skb);
 753 }
 754
 755 /****************************************************************
 756  *     kaweth_start_xmit
 757  ****************************************************************/
 758 static int kaweth_start_xmit(struct sk_buff *skb, struct net_device *net)
 759 {
 760         struct kaweth_device *kaweth = netdev_priv(net);
 761         __le16 *private_header;
 762
 763         int res;
 764
 765         spin_lock(&kaweth->device_lock);
 766
 767         kaweth_async_set_rx_mode(kaweth);
 768         netif_stop_queue(net);
 769         if (IS_BLOCKED(kaweth->status)) {
 770                 goto skip;
 771         }
 772
 773         /* We now decide whether we can put our special header into the sk_buff */
 774         if (skb_cloned(skb) || skb_headroom(skb) < 2) {
 775                 /* no such luck - we make our own */
 776                 struct sk_buff *copied_skb;
 777                 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC);
 778                 dev_kfree_skb_irq(skb);
 779                 skb = copied_skb;
 780                 if (!copied_skb) {
 781                         kaweth->stats.tx_errors++;
 782                         netif_start_queue(net);
 783                         spin_unlock(&kaweth->device_lock);
 784                         return 0;
 785                 }
 786         }
 787
 788         private_header = (__le16 *)__skb_push(skb, 2);
 789         *private_header = cpu_to_le16(skb->len-2);
 790         kaweth->tx_skb = skb;
 791
 792         usb_fill_bulk_urb(kaweth->tx_urb,
 793                       kaweth->dev,
 794                       usb_sndbulkpipe(kaweth->dev, 2),
 795                       private_header,
 796                       skb->len,
 797                       kaweth_usb_transmit_complete,
 798                       kaweth);
 799         kaweth->end = 0;
 800
 801         if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
 802         {
 803                 warn("kaweth failed tx_urb %d", res);
 804 skip:
 805                 kaweth->stats.tx_errors++;
 806
 807                 netif_start_queue(net);
 808                 dev_kfree_skb_irq(skb);
 809         }
 810         else
 811         {
 812                 kaweth->stats.tx_packets++;
 813                 kaweth->stats.tx_bytes += skb->len;
 814                 net->trans_start = jiffies;
 815         }
 816
 817         spin_unlock(&kaweth->device_lock);
 818
 819         return 0;
 820 }
 821
 822 /****************************************************************
 823  *     kaweth_set_rx_mode
 824  ****************************************************************/
 825 static void kaweth_set_rx_mode(struct net_device *net)
 826 {
 827         struct kaweth_device *kaweth = netdev_priv(net);
 828
 829         __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
 830                                      KAWETH_PACKET_FILTER_BROADCAST |
 831                                      KAWETH_PACKET_FILTER_MULTICAST;
 832
 833         dbg("Setting Rx mode to %d", packet_filter_bitmap);
 834
 835         netif_stop_queue(net);
 836
 837         if (net->flags & IFF_PROMISC) {
 838                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
 839         }
 840         else if ((net->mc_count) || (net->flags & IFF_ALLMULTI)) {
 841                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
 842         }
 843
 844         kaweth->packet_filter_bitmap = packet_filter_bitmap;
 845         netif_wake_queue(net);
 846 }
 847
 848 /****************************************************************
 849  *     kaweth_async_set_rx_mode
 850  ****************************************************************/
 851 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
 852 {
 853         __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
 854         kaweth->packet_filter_bitmap = 0;
 855         if (packet_filter_bitmap == 0)
 856                 return;
 857
 858         {
 859         int result;
 860         result = kaweth_control(kaweth,
 861                                 usb_sndctrlpipe(kaweth->dev, 0),
 862                                 KAWETH_COMMAND_SET_PACKET_FILTER,
 863                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 864                                 packet_filter_bitmap,
 865                                 0,
 866                                 (void *)&kaweth->scratch,
 867                                 0,
 868                                 KAWETH_CONTROL_TIMEOUT);
 869
 870         if(result < 0) {
 871                 err("Failed to set Rx mode: %d", result);
 872         }
 873         else {
 874                 dbg("Set Rx mode to %d", packet_filter_bitmap);
 875         }
 876         }
 877 }
 878
 879 /****************************************************************
 880  *     kaweth_netdev_stats
 881  ****************************************************************/
 882 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev)
 883 {
 884         struct kaweth_device *kaweth = netdev_priv(dev);
 885         return &kaweth->stats;
 886 }
 887
 888 /****************************************************************
 889  *     kaweth_tx_timeout
 890  ****************************************************************/
 891 static void kaweth_tx_timeout(struct net_device *net)
 892 {
 893         struct kaweth_device *kaweth = netdev_priv(net);
 894
 895         warn("%s: Tx timed out. Resetting.", net->name);
 896         kaweth->stats.tx_errors++;
 897         net->trans_start = jiffies;
 898
 899         usb_unlink_urb(kaweth->tx_urb);
 900 }
 901
 902 /****************************************************************
 903  *     kaweth_suspend
 904  ****************************************************************/
 905 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message)
 906 {
 907         struct kaweth_device *kaweth = usb_get_intfdata(intf);
 908         unsigned long flags;
 909
 910         spin_lock_irqsave(&kaweth->device_lock, flags);
 911         kaweth->status |= KAWETH_STATUS_SUSPENDING;
 912         spin_unlock_irqrestore(&kaweth->device_lock, flags);
 913
 914         kaweth_kill_urbs(kaweth);
 915         return 0;
 916 }
 917
 918 /****************************************************************
 919  *     kaweth_resume
 920  ****************************************************************/
 921 static int kaweth_resume(struct usb_interface *intf)
 922 {
 923         struct kaweth_device *kaweth = usb_get_intfdata(intf);
 924         unsigned long flags;
 925
 926         spin_lock_irqsave(&kaweth->device_lock, flags);
 927         kaweth->status &= ~KAWETH_STATUS_SUSPENDING;
 928         spin_unlock_irqrestore(&kaweth->device_lock, flags);
 929
 930         if (!kaweth->opened)
 931                 return 0;
 932         kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
 933         kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
 934
 935         return 0;
 936 }
 937
 938 /****************************************************************
 939  *     kaweth_probe
 940  ****************************************************************/
 941 static int kaweth_probe(
 942                 struct usb_interface *intf,
 943                 const struct usb_device_id *id      /* from id_table */
 944         )
 945 {
 946         struct usb_device *dev = interface_to_usbdev(intf);
 947         struct kaweth_device *kaweth;
 948         struct net_device *netdev;
 949         const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 950         int result = 0;
 951
 952         dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x",
 953                  dev->devnum,
 954                  le16_to_cpu(dev->descriptor.idVendor),
 955                  le16_to_cpu(dev->descriptor.idProduct),
 956                  le16_to_cpu(dev->descriptor.bcdDevice));
 957
 958         dbg("Device at %p", dev);
 959
 960         dbg("Descriptor length: %x type: %x",
 961                  (int)dev->descriptor.bLength,
 962                  (int)dev->descriptor.bDescriptorType);
 963
 964         netdev = alloc_etherdev(sizeof(*kaweth));
 965         if (!netdev)
 966                 return -ENOMEM;
 967
 968         kaweth = netdev_priv(netdev);
 969         kaweth->dev = dev;
 970         kaweth->net = netdev;
 971
 972         spin_lock_init(&kaweth->device_lock);
 973         init_waitqueue_head(&kaweth->term_wait);
 974
 975         dbg("Resetting.");
 976
 977         kaweth_reset(kaweth);
 978
 979         /*
 980          * If high byte of bcdDevice is nonzero, firmware is already
 981          * downloaded. Don't try to do it again, or we'll hang the device.
 982          */
 983
 984         if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) {
 985                 info("Firmware present in device.");
 986         } else {
 987                 /* Download the firmware */
 988                 info("Downloading firmware...");
 989                 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
 990                 if ((result = kaweth_download_firmware(kaweth,
 991                                                       kaweth_new_code,
 992                                                       len_kaweth_new_code,
 993                                                       100,
 994                                                       2)) < 0) {
 995                         err("Error downloading firmware (%d)", result);
 996                         goto err_fw;
 997                 }
 998
 999                 if ((result = kaweth_download_firmware(kaweth,
1000                                                       kaweth_new_code_fix,
1001                                                       len_kaweth_new_code_fix,
1002                                                       100,
1003                                                       3)) < 0) {
1004                         err("Error downloading firmware fix (%d)", result);
1005                         goto err_fw;
1006                 }
1007
1008                 if ((result = kaweth_download_firmware(kaweth,
1009                                                       kaweth_trigger_code,
1010                                                       len_kaweth_trigger_code,
1011                                                       126,
1012                                                       2)) < 0) {
1013                         err("Error downloading trigger code (%d)", result);
1014                         goto err_fw;
1015
1016                 }
1017
1018                 if ((result = kaweth_download_firmware(kaweth,
1019                                                       kaweth_trigger_code_fix,
1020                                                       len_kaweth_trigger_code_fix,
1021                                                       126,
1022                                                       3)) < 0) {
1023                         err("Error downloading trigger code fix (%d)", result);
1024                         goto err_fw;
1025                 }
1026
1027
1028                 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
1029                         err("Error triggering firmware (%d)", result);
1030                         goto err_fw;
1031                 }
1032
1033                 /* Device will now disappear for a moment...  */
1034                 info("Firmware loaded.  I'll be back...");
1035 err_fw:
1036                 free_page((unsigned long)kaweth->firmware_buf);
1037                 free_netdev(netdev);
1038                 return -EIO;
1039         }
1040
1041         result = kaweth_read_configuration(kaweth);
1042
1043         if(result < 0) {
1044                 err("Error reading configuration (%d), no net device created", result);
1045                 goto err_free_netdev;
1046         }
1047
1048         info("Statistics collection: %x", kaweth->configuration.statistics_mask);
1049         info("Multicast filter limit: %x", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
1050         info("MTU: %d", le16_to_cpu(kaweth->configuration.segment_size));
1051         info("Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
1052                  (int)kaweth->configuration.hw_addr[0],
1053                  (int)kaweth->configuration.hw_addr[1],
1054                  (int)kaweth->configuration.hw_addr[2],
1055                  (int)kaweth->configuration.hw_addr[3],
1056                  (int)kaweth->configuration.hw_addr[4],
1057                  (int)kaweth->configuration.hw_addr[5]);
1058
1059         if(!memcmp(&kaweth->configuration.hw_addr,
1060                    &bcast_addr,
1061                    sizeof(bcast_addr))) {
1062                 err("Firmware not functioning properly, no net device created");
1063                 goto err_free_netdev;
1064         }
1065
1066         if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
1067                 dbg("Error setting URB size");
1068                 goto err_free_netdev;
1069         }
1070
1071         if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
1072                 err("Error setting SOFS wait");
1073                 goto err_free_netdev;
1074         }
1075
1076         result = kaweth_set_receive_filter(kaweth,
1077                                            KAWETH_PACKET_FILTER_DIRECTED |
1078                                            KAWETH_PACKET_FILTER_BROADCAST |
1079                                            KAWETH_PACKET_FILTER_MULTICAST);
1080
1081         if(result < 0) {
1082                 err("Error setting receive filter");
1083                 goto err_free_netdev;
1084         }
1085
1086         dbg("Initializing net device.");
1087
1088         kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1089         if (!kaweth->tx_urb)
1090                 goto err_free_netdev;
1091         kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1092         if (!kaweth->rx_urb)
1093                 goto err_only_tx;
1094         kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1095         if (!kaweth->irq_urb)
1096                 goto err_tx_and_rx;
1097
1098         kaweth->intbuffer = usb_buffer_alloc(   kaweth->dev,
1099                                                 INTBUFFERSIZE,
1100                                                 GFP_KERNEL,
1101                                                 &kaweth->intbufferhandle);
1102         if (!kaweth->intbuffer)
1103                 goto err_tx_and_rx_and_irq;
1104         kaweth->rx_buf = usb_buffer_alloc(      kaweth->dev,
1105                                                 KAWETH_BUF_SIZE,
1106                                                 GFP_KERNEL,
1107                                                 &kaweth->rxbufferhandle);
1108         if (!kaweth->rx_buf)
1109                 goto err_all_but_rxbuf;
1110
1111         memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr));
1112         memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr,
1113                sizeof(kaweth->configuration.hw_addr));
1114
1115         netdev->open = kaweth_open;
1116         netdev->stop = kaweth_close;
1117
1118         netdev->watchdog_timeo = KAWETH_TX_TIMEOUT;
1119         netdev->tx_timeout = kaweth_tx_timeout;
1120
1121         netdev->hard_start_xmit = kaweth_start_xmit;
1122         netdev->set_multicast_list = kaweth_set_rx_mode;
1123         netdev->get_stats = kaweth_netdev_stats;
1124         netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size);
1125         SET_ETHTOOL_OPS(netdev, &ops);
1126
1127         /* kaweth is zeroed as part of alloc_netdev */
1128
1129         INIT_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl, (void *)kaweth);
1130
1131         SET_MODULE_OWNER(netdev);
1132
1133         usb_set_intfdata(intf, kaweth);
1134
1135 #if 0
1136 // dma_supported() is deeply broken on almost all architectures
1137         if (dma_supported (&intf->dev, 0xffffffffffffffffULL))
1138                 kaweth->net->features |= NETIF_F_HIGHDMA;
1139 #endif
1140
1141         SET_NETDEV_DEV(netdev, &intf->dev);
1142         if (register_netdev(netdev) != 0) {
1143                 err("Error registering netdev.");
1144                 goto err_intfdata;
1145         }
1146
1147         info("kaweth interface created at %s", kaweth->net->name);
1148
1149         dbg("Kaweth probe returning.");
1150
1151         return 0;
1152
1153 err_intfdata:
1154         usb_set_intfdata(intf, NULL);
1155         usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1156 err_all_but_rxbuf:
1157         usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1158 err_tx_and_rx_and_irq:
1159         usb_free_urb(kaweth->irq_urb);
1160 err_tx_and_rx:
1161         usb_free_urb(kaweth->rx_urb);
1162 err_only_tx:
1163         usb_free_urb(kaweth->tx_urb);
1164 err_free_netdev:
1165         free_netdev(netdev);
1166
1167         return -EIO;
1168 }
1169
1170 /****************************************************************
1171  *     kaweth_disconnect
1172  ****************************************************************/
1173 static void kaweth_disconnect(struct usb_interface *intf)
1174 {
1175         struct kaweth_device *kaweth = usb_get_intfdata(intf);
1176         struct net_device *netdev;
1177
1178         info("Unregistering");
1179
1180         usb_set_intfdata(intf, NULL);
1181         if (!kaweth) {
1182                 warn("unregistering non-existant device");
1183                 return;
1184         }
1185         netdev = kaweth->net;
1186
1187         dbg("Unregistering net device");
1188         unregister_netdev(netdev);
1189
1190         usb_free_urb(kaweth->rx_urb);
1191         usb_free_urb(kaweth->tx_urb);
1192         usb_free_urb(kaweth->irq_urb);
1193
1194         usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1195         usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1196
1197         free_netdev(netdev);
1198 }
1199
1200
1201 // FIXME this completion stuff is a modified clone of
1202 // an OLD version of some stuff in usb.c ...
1203 struct usb_api_data {
1204         wait_queue_head_t wqh;
1205         int done;
1206 };
1207
1208 /*-------------------------------------------------------------------*
1209  * completion handler for compatibility wrappers (sync control/bulk) *
1210  *-------------------------------------------------------------------*/
1211 static void usb_api_blocking_completion(struct urb *urb)
1212 {
1213         struct usb_api_data *awd = (struct usb_api_data *)urb->context;
1214
1215         awd->done=1;
1216         wake_up(&awd->wqh);
1217 }
1218
1219 /*-------------------------------------------------------------------*
1220  *                         COMPATIBILITY STUFF                       *
1221  *-------------------------------------------------------------------*/
1222
1223 // Starts urb and waits for completion or timeout
1224 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
1225 {
1226         struct usb_api_data awd;
1227         int status;
1228
1229         init_waitqueue_head(&awd.wqh);
1230         awd.done = 0;
1231
1232         urb->context = &awd;
1233         status = usb_submit_urb(urb, GFP_NOIO);
1234         if (status) {
1235                 // something went wrong
1236                 usb_free_urb(urb);
1237                 return status;
1238         }
1239
1240         if (!wait_event_timeout(awd.wqh, awd.done, timeout)) {
1241                 // timeout
1242                 warn("usb_control/bulk_msg: timeout");
1243                 usb_kill_urb(urb);  // remove urb safely
1244                 status = -ETIMEDOUT;
1245         }
1246         else {
1247                 status = urb->status;
1248         }
1249
1250         if (actual_length) {
1251                 *actual_length = urb->actual_length;
1252         }
1253
1254         usb_free_urb(urb);
1255         return status;
1256 }
1257
1258 /*-------------------------------------------------------------------*/
1259 // returns status (negative) or length (positive)
1260 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
1261                                        unsigned int pipe,
1262                                        struct usb_ctrlrequest *cmd, void *data,
1263                                        int len, int timeout)
1264 {
1265         struct urb *urb;
1266         int retv;
1267         int length;
1268
1269         urb = usb_alloc_urb(0, GFP_NOIO);
1270         if (!urb)
1271                 return -ENOMEM;
1272
1273         usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data,
1274                          len, usb_api_blocking_completion, NULL);
1275
1276         retv = usb_start_wait_urb(urb, timeout, &length);
1277         if (retv < 0) {
1278                 return retv;
1279         }
1280         else {
1281                 return length;
1282         }
1283 }
1284
1285
1286 /****************************************************************
1287  *     kaweth_init
1288  ****************************************************************/
1289 static int __init kaweth_init(void)
1290 {
1291         dbg("Driver loading");
1292         return usb_register(&kaweth_driver);
1293 }
1294
1295 /****************************************************************
1296  *     kaweth_exit
1297  ****************************************************************/
1298 static void __exit kaweth_exit(void)
1299 {
1300         usb_deregister(&kaweth_driver);
1301 }
1302
1303 module_init(kaweth_init);
1304 module_exit(kaweth_exit);
1305
1306
1307
1308
1309
1310
1311
1312
1313