git.oblomov.eu Git - linux-2.6/blob - drivers/net/usb/kaweth.c

   1 /****************************************************************
   2  *
   3  *     kaweth.c - driver for KL5KUSB101 based USB->Ethernet
   4  *
   5  *     (c) 2000 Interlan Communications
   6  *     (c) 2000 Stephane Alnet
   7  *     (C) 2001 Brad Hards
   8  *     (C) 2002 Oliver Neukum
   9  *
  10  *     Original author: The Zapman <zapman@interlan.net>
  11  *     Inspired by, and much credit goes to Michael Rothwell
  12  *     <rothwell@interlan.net> for the test equipment, help, and patience
  13  *     Based off of (and with thanks to) Petko Manolov's pegaus.c driver.
  14  *     Also many thanks to Joel Silverman and Ed Surprenant at Kawasaki
  15  *     for providing the firmware and driver resources.
  16  *
  17  *     This program is free software; you can redistribute it and/or
  18  *     modify it under the terms of the GNU General Public License as
  19  *     published by the Free Software Foundation; either version 2, or
  20  *     (at your option) any later version.
  21  *
  22  *     This program is distributed in the hope that it will be useful,
  23  *     but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25  *     GNU General Public License for more details.
  26  *
  27  *     You should have received a copy of the GNU General Public License
  28  *     along with this program; if not, write to the Free Software Foundation,
  29  *     Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  30  *
  31  ****************************************************************/
  32
  33 /* TODO:
  34  * Fix in_interrupt() problem
  35  * Develop test procedures for USB net interfaces
  36  * Run test procedures
  37  * Fix bugs from previous two steps
  38  * Snoop other OSs for any tricks we're not doing
  39  * SMP locking
  40  * Reduce arbitrary timeouts
  41  * Smart multicast support
  42  * Temporary MAC change support
  43  * Tunable SOFs parameter - ioctl()?
  44  * Ethernet stats collection
  45  * Code formatting improvements
  46  */
  47
  48 #include <linux/module.h>
  49 #include <linux/slab.h>
  50 #include <linux/string.h>
  51 #include <linux/init.h>
  52 #include <linux/delay.h>
  53 #include <linux/netdevice.h>
  54 #include <linux/etherdevice.h>
  55 #include <linux/usb.h>
  56 #include <linux/types.h>
  57 #include <linux/ethtool.h>
  58 #include <linux/dma-mapping.h>
  59 #include <linux/wait.h>
  60 #include <asm/uaccess.h>
  61 #include <asm/byteorder.h>
  62
  63 #undef DEBUG
  64
  65 #include "kawethfw.h"
  66
  67 #define KAWETH_MTU                      1514
  68 #define KAWETH_BUF_SIZE                 1664
  69 #define KAWETH_TX_TIMEOUT               (5 * HZ)
  70 #define KAWETH_SCRATCH_SIZE             32
  71 #define KAWETH_FIRMWARE_BUF_SIZE        4096
  72 #define KAWETH_CONTROL_TIMEOUT          (30000)
  73
  74 #define KAWETH_STATUS_BROKEN            0x0000001
  75 #define KAWETH_STATUS_CLOSING           0x0000002
  76 #define KAWETH_STATUS_SUSPENDING        0x0000004
  77
  78 #define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING)
  79
  80 #define KAWETH_PACKET_FILTER_PROMISCUOUS        0x01
  81 #define KAWETH_PACKET_FILTER_ALL_MULTICAST      0x02
  82 #define KAWETH_PACKET_FILTER_DIRECTED           0x04
  83 #define KAWETH_PACKET_FILTER_BROADCAST          0x08
  84 #define KAWETH_PACKET_FILTER_MULTICAST          0x10
  85
  86 /* Table 7 */
  87 #define KAWETH_COMMAND_GET_ETHERNET_DESC        0x00
  88 #define KAWETH_COMMAND_MULTICAST_FILTERS        0x01
  89 #define KAWETH_COMMAND_SET_PACKET_FILTER        0x02
  90 #define KAWETH_COMMAND_STATISTICS               0x03
  91 #define KAWETH_COMMAND_SET_TEMP_MAC             0x06
  92 #define KAWETH_COMMAND_GET_TEMP_MAC             0x07
  93 #define KAWETH_COMMAND_SET_URB_SIZE             0x08
  94 #define KAWETH_COMMAND_SET_SOFS_WAIT            0x09
  95 #define KAWETH_COMMAND_SCAN                     0xFF
  96
  97 #define KAWETH_SOFS_TO_WAIT                     0x05
  98
  99 #define INTBUFFERSIZE                           4
 100
 101 #define STATE_OFFSET                            0
 102 #define STATE_MASK                              0x40
 103 #define STATE_SHIFT                             5
 104
 105 #define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED)
 106
 107
 108 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>");
 109 MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver");
 110 MODULE_LICENSE("GPL");
 111
 112 static const char driver_name[] = "kaweth";
 113
 114 static int kaweth_probe(
 115                 struct usb_interface *intf,
 116                 const struct usb_device_id *id  /* from id_table */
 117         );
 118 static void kaweth_disconnect(struct usb_interface *intf);
 119 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
 120                                        unsigned int pipe,
 121                                        struct usb_ctrlrequest *cmd, void *data,
 122                                        int len, int timeout);
 123 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message);
 124 static int kaweth_resume(struct usb_interface *intf);
 125
 126 /****************************************************************
 127  *     usb_device_id
 128  ****************************************************************/
 129 static struct usb_device_id usb_klsi_table[] = {
 130         { USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */
 131         { USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */
 132         { USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */
 133         { USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */
 134         { USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */
 135         { USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */
 136         { USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */
 137         { USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */
 138         { USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */
 139         { USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */
 140         { USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */
 141         { USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */
 142         { USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */
 143         { USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */
 144         { USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */
 145         { USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */
 146         { USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */
 147         { USB_DEVICE(0x0846, 0x1001) }, /* NetGear EA-101 */
 148         { USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */
 149         { USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */
 150         { USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */
 151         { USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */
 152         { USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */
 153         { USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */
 154         { USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */
 155         { USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */
 156         { USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */
 157         { USB_DEVICE(0x1485, 0x0001) }, /* Silicom U2E */
 158         { USB_DEVICE(0x1485, 0x0002) }, /* Psion Dacom Gold Port Ethernet */
 159         { USB_DEVICE(0x1645, 0x0005) }, /* Entrega E45 */
 160         { USB_DEVICE(0x1645, 0x0008) }, /* Entrega USB Ethernet Adapter */
 161         { USB_DEVICE(0x1645, 0x8005) }, /* PortGear Ethernet Adapter */
 162         { USB_DEVICE(0x1668, 0x0323) }, /* Actiontec USB Ethernet */
 163         { USB_DEVICE(0x2001, 0x4000) }, /* D-link DSB-650C */
 164         {} /* Null terminator */
 165 };
 166
 167 MODULE_DEVICE_TABLE (usb, usb_klsi_table);
 168
 169 /****************************************************************
 170  *     kaweth_driver
 171  ****************************************************************/
 172 static struct usb_driver kaweth_driver = {
 173         .name =         driver_name,
 174         .probe =        kaweth_probe,
 175         .disconnect =   kaweth_disconnect,
 176         .suspend =      kaweth_suspend,
 177         .resume =       kaweth_resume,
 178         .id_table =     usb_klsi_table,
 179         .supports_autosuspend = 1,
 180 };
 181
 182 typedef __u8 eth_addr_t[6];
 183
 184 /****************************************************************
 185  *     usb_eth_dev
 186  ****************************************************************/
 187 struct usb_eth_dev {
 188         char *name;
 189         __u16 vendor;
 190         __u16 device;
 191         void *pdata;
 192 };
 193
 194 /****************************************************************
 195  *     kaweth_ethernet_configuration
 196  *     Refer Table 8
 197  ****************************************************************/
 198 struct kaweth_ethernet_configuration
 199 {
 200         __u8 size;
 201         __u8 reserved1;
 202         __u8 reserved2;
 203         eth_addr_t hw_addr;
 204         __u32 statistics_mask;
 205         __le16 segment_size;
 206         __u16 max_multicast_filters;
 207         __u8 reserved3;
 208 } __attribute__ ((packed));
 209
 210 /****************************************************************
 211  *     kaweth_device
 212  ****************************************************************/
 213 struct kaweth_device
 214 {
 215         spinlock_t device_lock;
 216
 217         __u32 status;
 218         int end;
 219         int suspend_lowmem_rx;
 220         int suspend_lowmem_ctrl;
 221         int linkstate;
 222         int opened;
 223         struct delayed_work lowmem_work;
 224
 225         struct usb_device *dev;
 226         struct usb_interface *intf;
 227         struct net_device *net;
 228         wait_queue_head_t term_wait;
 229
 230         struct urb *rx_urb;
 231         struct urb *tx_urb;
 232         struct urb *irq_urb;
 233
 234         dma_addr_t intbufferhandle;
 235         __u8 *intbuffer;
 236         dma_addr_t rxbufferhandle;
 237         __u8 *rx_buf;
 238
 239
 240         struct sk_buff *tx_skb;
 241
 242         __u8 *firmware_buf;
 243         __u8 scratch[KAWETH_SCRATCH_SIZE];
 244         __u16 packet_filter_bitmap;
 245
 246         struct kaweth_ethernet_configuration configuration;
 247
 248         struct net_device_stats stats;
 249 };
 250
 251
 252 /****************************************************************
 253  *     kaweth_control
 254  ****************************************************************/
 255 static int kaweth_control(struct kaweth_device *kaweth,
 256                           unsigned int pipe,
 257                           __u8 request,
 258                           __u8 requesttype,
 259                           __u16 value,
 260                           __u16 index,
 261                           void *data,
 262                           __u16 size,
 263                           int timeout)
 264 {
 265         struct usb_ctrlrequest *dr;
 266
 267         dbg("kaweth_control()");
 268
 269         if(in_interrupt()) {
 270                 dbg("in_interrupt()");
 271                 return -EBUSY;
 272         }
 273
 274         dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
 275
 276         if (!dr) {
 277                 dbg("kmalloc() failed");
 278                 return -ENOMEM;
 279         }
 280
 281         dr->bRequestType= requesttype;
 282         dr->bRequest = request;
 283         dr->wValue = cpu_to_le16p(&value);
 284         dr->wIndex = cpu_to_le16p(&index);
 285         dr->wLength = cpu_to_le16p(&size);
 286
 287         return kaweth_internal_control_msg(kaweth->dev,
 288                                         pipe,
 289                                         dr,
 290                                         data,
 291                                         size,
 292                                         timeout);
 293 }
 294
 295 /****************************************************************
 296  *     kaweth_read_configuration
 297  ****************************************************************/
 298 static int kaweth_read_configuration(struct kaweth_device *kaweth)
 299 {
 300         int retval;
 301
 302         dbg("Reading kaweth configuration");
 303
 304         retval = kaweth_control(kaweth,
 305                                 usb_rcvctrlpipe(kaweth->dev, 0),
 306                                 KAWETH_COMMAND_GET_ETHERNET_DESC,
 307                                 USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE,
 308                                 0,
 309                                 0,
 310                                 (void *)&kaweth->configuration,
 311                                 sizeof(kaweth->configuration),
 312                                 KAWETH_CONTROL_TIMEOUT);
 313
 314         return retval;
 315 }
 316
 317 /****************************************************************
 318  *     kaweth_set_urb_size
 319  ****************************************************************/
 320 static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size)
 321 {
 322         int retval;
 323
 324         dbg("Setting URB size to %d", (unsigned)urb_size);
 325
 326         retval = kaweth_control(kaweth,
 327                                 usb_sndctrlpipe(kaweth->dev, 0),
 328                                 KAWETH_COMMAND_SET_URB_SIZE,
 329                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 330                                 urb_size,
 331                                 0,
 332                                 (void *)&kaweth->scratch,
 333                                 0,
 334                                 KAWETH_CONTROL_TIMEOUT);
 335
 336         return retval;
 337 }
 338
 339 /****************************************************************
 340  *     kaweth_set_sofs_wait
 341  ****************************************************************/
 342 static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait)
 343 {
 344         int retval;
 345
 346         dbg("Set SOFS wait to %d", (unsigned)sofs_wait);
 347
 348         retval = kaweth_control(kaweth,
 349                                 usb_sndctrlpipe(kaweth->dev, 0),
 350                                 KAWETH_COMMAND_SET_SOFS_WAIT,
 351                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 352                                 sofs_wait,
 353                                 0,
 354                                 (void *)&kaweth->scratch,
 355                                 0,
 356                                 KAWETH_CONTROL_TIMEOUT);
 357
 358         return retval;
 359 }
 360
 361 /****************************************************************
 362  *     kaweth_set_receive_filter
 363  ****************************************************************/
 364 static int kaweth_set_receive_filter(struct kaweth_device *kaweth,
 365                                      __u16 receive_filter)
 366 {
 367         int retval;
 368
 369         dbg("Set receive filter to %d", (unsigned)receive_filter);
 370
 371         retval = kaweth_control(kaweth,
 372                                 usb_sndctrlpipe(kaweth->dev, 0),
 373                                 KAWETH_COMMAND_SET_PACKET_FILTER,
 374                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 375                                 receive_filter,
 376                                 0,
 377                                 (void *)&kaweth->scratch,
 378                                 0,
 379                                 KAWETH_CONTROL_TIMEOUT);
 380
 381         return retval;
 382 }
 383
 384 /****************************************************************
 385  *     kaweth_download_firmware
 386  ****************************************************************/
 387 static int kaweth_download_firmware(struct kaweth_device *kaweth,
 388                                     __u8 *data,
 389                                     __u16 data_len,
 390                                     __u8 interrupt,
 391                                     __u8 type)
 392 {
 393         if(data_len > KAWETH_FIRMWARE_BUF_SIZE) {
 394                 err("Firmware too big: %d", data_len);
 395                 return -ENOSPC;
 396         }
 397
 398         memcpy(kaweth->firmware_buf, data, data_len);
 399
 400         kaweth->firmware_buf[2] = (data_len & 0xFF) - 7;
 401         kaweth->firmware_buf[3] = data_len >> 8;
 402         kaweth->firmware_buf[4] = type;
 403         kaweth->firmware_buf[5] = interrupt;
 404
 405         dbg("High: %i, Low:%i", kaweth->firmware_buf[3],
 406                    kaweth->firmware_buf[2]);
 407
 408         dbg("Downloading firmware at %p to kaweth device at %p",
 409             data,
 410             kaweth);
 411         dbg("Firmware length: %d", data_len);
 412
 413         return kaweth_control(kaweth,
 414                               usb_sndctrlpipe(kaweth->dev, 0),
 415                               KAWETH_COMMAND_SCAN,
 416                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 417                               0,
 418                               0,
 419                               (void *)kaweth->firmware_buf,
 420                               data_len,
 421                               KAWETH_CONTROL_TIMEOUT);
 422 }
 423
 424 /****************************************************************
 425  *     kaweth_trigger_firmware
 426  ****************************************************************/
 427 static int kaweth_trigger_firmware(struct kaweth_device *kaweth,
 428                                    __u8 interrupt)
 429 {
 430         kaweth->firmware_buf[0] = 0xB6;
 431         kaweth->firmware_buf[1] = 0xC3;
 432         kaweth->firmware_buf[2] = 0x01;
 433         kaweth->firmware_buf[3] = 0x00;
 434         kaweth->firmware_buf[4] = 0x06;
 435         kaweth->firmware_buf[5] = interrupt;
 436         kaweth->firmware_buf[6] = 0x00;
 437         kaweth->firmware_buf[7] = 0x00;
 438
 439         dbg("Triggering firmware");
 440
 441         return kaweth_control(kaweth,
 442                               usb_sndctrlpipe(kaweth->dev, 0),
 443                               KAWETH_COMMAND_SCAN,
 444                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 445                               0,
 446                               0,
 447                               (void *)kaweth->firmware_buf,
 448                               8,
 449                               KAWETH_CONTROL_TIMEOUT);
 450 }
 451
 452 /****************************************************************
 453  *     kaweth_reset
 454  ****************************************************************/
 455 static int kaweth_reset(struct kaweth_device *kaweth)
 456 {
 457         int result;
 458
 459         dbg("kaweth_reset(%p)", kaweth);
 460         result = kaweth_control(kaweth,
 461                                 usb_sndctrlpipe(kaweth->dev, 0),
 462                                 USB_REQ_SET_CONFIGURATION,
 463                                 0,
 464                                 kaweth->dev->config[0].desc.bConfigurationValue,
 465                                 0,
 466                                 NULL,
 467                                 0,
 468                                 KAWETH_CONTROL_TIMEOUT);
 469
 470         mdelay(10);
 471
 472         dbg("kaweth_reset() returns %d.",result);
 473
 474         return result;
 475 }
 476
 477 static void kaweth_usb_receive(struct urb *);
 478 static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t);
 479
 480 /****************************************************************
 481         int_callback
 482 *****************************************************************/
 483
 484 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf)
 485 {
 486         int status;
 487
 488         status = usb_submit_urb (kaweth->irq_urb, mf);
 489         if (unlikely(status == -ENOMEM)) {
 490                 kaweth->suspend_lowmem_ctrl = 1;
 491                 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
 492         } else {
 493                 kaweth->suspend_lowmem_ctrl = 0;
 494         }
 495
 496         if (status)
 497                 err ("can't resubmit intr, %s-%s, status %d",
 498                                 kaweth->dev->bus->bus_name,
 499                                 kaweth->dev->devpath, status);
 500 }
 501
 502 static void int_callback(struct urb *u)
 503 {
 504         struct kaweth_device *kaweth = u->context;
 505         int act_state;
 506
 507         switch (u->status) {
 508         case 0:                 /* success */
 509                 break;
 510         case -ECONNRESET:       /* unlink */
 511         case -ENOENT:
 512         case -ESHUTDOWN:
 513                 return;
 514         /* -EPIPE:  should clear the halt */
 515         default:                /* error */
 516                 goto resubmit;
 517         }
 518
 519         /* we check the link state to report changes */
 520         if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) {
 521                 if (act_state)
 522                         netif_carrier_on(kaweth->net);
 523                 else
 524                         netif_carrier_off(kaweth->net);
 525
 526                 kaweth->linkstate = act_state;
 527         }
 528 resubmit:
 529         kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC);
 530 }
 531
 532 static void kaweth_resubmit_tl(struct work_struct *work)
 533 {
 534         struct kaweth_device *kaweth =
 535                 container_of(work, struct kaweth_device, lowmem_work.work);
 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_copy_to_linear_data(skb, kaweth->rx_buf + 2, pkt_len);
 638
 639                 skb_put(skb, pkt_len);
 640
 641                 skb->protocol = eth_type_trans(skb, net);
 642
 643                 netif_rx(skb);
 644
 645                 kaweth->stats.rx_packets++;
 646                 kaweth->stats.rx_bytes += pkt_len;
 647         }
 648
 649         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 650 }
 651
 652 /****************************************************************
 653  *     kaweth_open
 654  ****************************************************************/
 655 static int kaweth_open(struct net_device *net)
 656 {
 657         struct kaweth_device *kaweth = netdev_priv(net);
 658         int res;
 659
 660         dbg("Opening network device.");
 661
 662         res = usb_autopm_get_interface(kaweth->intf);
 663         if (res) {
 664                 err("Interface cannot be resumed.");
 665                 return -EIO;
 666         }
 667         res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL);
 668         if (res)
 669                 goto err_out;
 670
 671         usb_fill_int_urb(
 672                 kaweth->irq_urb,
 673                 kaweth->dev,
 674                 usb_rcvintpipe(kaweth->dev, 3),
 675                 kaweth->intbuffer,
 676                 INTBUFFERSIZE,
 677                 int_callback,
 678                 kaweth,
 679                 250); /* overriding the descriptor */
 680         kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle;
 681         kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 682
 683         res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL);
 684         if (res) {
 685                 usb_kill_urb(kaweth->rx_urb);
 686                 goto err_out;
 687         }
 688         kaweth->opened = 1;
 689
 690         netif_start_queue(net);
 691
 692         kaweth_async_set_rx_mode(kaweth);
 693         return 0;
 694
 695 err_out:
 696         usb_autopm_enable(kaweth->intf);
 697         return -EIO;
 698 }
 699
 700 /****************************************************************
 701  *     kaweth_kill_urbs
 702  ****************************************************************/
 703 static void kaweth_kill_urbs(struct kaweth_device *kaweth)
 704 {
 705         usb_kill_urb(kaweth->irq_urb);
 706         usb_kill_urb(kaweth->rx_urb);
 707         usb_kill_urb(kaweth->tx_urb);
 708
 709         cancel_delayed_work_sync(&kaweth->lowmem_work);
 710
 711         /* a scheduled work may have resubmitted,
 712            we hit them again */
 713         usb_kill_urb(kaweth->irq_urb);
 714         usb_kill_urb(kaweth->rx_urb);
 715 }
 716
 717 /****************************************************************
 718  *     kaweth_close
 719  ****************************************************************/
 720 static int kaweth_close(struct net_device *net)
 721 {
 722         struct kaweth_device *kaweth = netdev_priv(net);
 723
 724         netif_stop_queue(net);
 725         kaweth->opened = 0;
 726
 727         kaweth->status |= KAWETH_STATUS_CLOSING;
 728
 729         kaweth_kill_urbs(kaweth);
 730
 731         kaweth->status &= ~KAWETH_STATUS_CLOSING;
 732
 733         usb_autopm_enable(kaweth->intf);
 734
 735         return 0;
 736 }
 737
 738 static void kaweth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
 739 {
 740         struct kaweth_device *kaweth = netdev_priv(dev);
 741
 742         strlcpy(info->driver, driver_name, sizeof(info->driver));
 743         usb_make_path(kaweth->dev, info->bus_info, sizeof (info->bus_info));
 744 }
 745
 746 static u32 kaweth_get_link(struct net_device *dev)
 747 {
 748         struct kaweth_device *kaweth = netdev_priv(dev);
 749
 750         return kaweth->linkstate;
 751 }
 752
 753 static struct ethtool_ops ops = {
 754         .get_drvinfo    = kaweth_get_drvinfo,
 755         .get_link       = kaweth_get_link
 756 };
 757
 758 /****************************************************************
 759  *     kaweth_usb_transmit_complete
 760  ****************************************************************/
 761 static void kaweth_usb_transmit_complete(struct urb *urb)
 762 {
 763         struct kaweth_device *kaweth = urb->context;
 764         struct sk_buff *skb = kaweth->tx_skb;
 765
 766         if (unlikely(urb->status != 0))
 767                 if (urb->status != -ENOENT)
 768                         dbg("%s: TX status %d.", kaweth->net->name, urb->status);
 769
 770         netif_wake_queue(kaweth->net);
 771         dev_kfree_skb_irq(skb);
 772 }
 773
 774 /****************************************************************
 775  *     kaweth_start_xmit
 776  ****************************************************************/
 777 static int kaweth_start_xmit(struct sk_buff *skb, struct net_device *net)
 778 {
 779         struct kaweth_device *kaweth = netdev_priv(net);
 780         __le16 *private_header;
 781
 782         int res;
 783
 784         spin_lock(&kaweth->device_lock);
 785
 786         kaweth_async_set_rx_mode(kaweth);
 787         netif_stop_queue(net);
 788         if (IS_BLOCKED(kaweth->status)) {
 789                 goto skip;
 790         }
 791
 792         /* We now decide whether we can put our special header into the sk_buff */
 793         if (skb_cloned(skb) || skb_headroom(skb) < 2) {
 794                 /* no such luck - we make our own */
 795                 struct sk_buff *copied_skb;
 796                 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC);
 797                 dev_kfree_skb_irq(skb);
 798                 skb = copied_skb;
 799                 if (!copied_skb) {
 800                         kaweth->stats.tx_errors++;
 801                         netif_start_queue(net);
 802                         spin_unlock(&kaweth->device_lock);
 803                         return 0;
 804                 }
 805         }
 806
 807         private_header = (__le16 *)__skb_push(skb, 2);
 808         *private_header = cpu_to_le16(skb->len-2);
 809         kaweth->tx_skb = skb;
 810
 811         usb_fill_bulk_urb(kaweth->tx_urb,
 812                       kaweth->dev,
 813                       usb_sndbulkpipe(kaweth->dev, 2),
 814                       private_header,
 815                       skb->len,
 816                       kaweth_usb_transmit_complete,
 817                       kaweth);
 818         kaweth->end = 0;
 819
 820         if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
 821         {
 822                 warn("kaweth failed tx_urb %d", res);
 823 skip:
 824                 kaweth->stats.tx_errors++;
 825
 826                 netif_start_queue(net);
 827                 dev_kfree_skb_irq(skb);
 828         }
 829         else
 830         {
 831                 kaweth->stats.tx_packets++;
 832                 kaweth->stats.tx_bytes += skb->len;
 833                 net->trans_start = jiffies;
 834         }
 835
 836         spin_unlock(&kaweth->device_lock);
 837
 838         return 0;
 839 }
 840
 841 /****************************************************************
 842  *     kaweth_set_rx_mode
 843  ****************************************************************/
 844 static void kaweth_set_rx_mode(struct net_device *net)
 845 {
 846         struct kaweth_device *kaweth = netdev_priv(net);
 847
 848         __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
 849                                      KAWETH_PACKET_FILTER_BROADCAST |
 850                                      KAWETH_PACKET_FILTER_MULTICAST;
 851
 852         dbg("Setting Rx mode to %d", packet_filter_bitmap);
 853
 854         netif_stop_queue(net);
 855
 856         if (net->flags & IFF_PROMISC) {
 857                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
 858         }
 859         else if ((net->mc_count) || (net->flags & IFF_ALLMULTI)) {
 860                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
 861         }
 862
 863         kaweth->packet_filter_bitmap = packet_filter_bitmap;
 864         netif_wake_queue(net);
 865 }
 866
 867 /****************************************************************
 868  *     kaweth_async_set_rx_mode
 869  ****************************************************************/
 870 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
 871 {
 872         __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
 873         kaweth->packet_filter_bitmap = 0;
 874         if (packet_filter_bitmap == 0)
 875                 return;
 876
 877         {
 878         int result;
 879         result = kaweth_control(kaweth,
 880                                 usb_sndctrlpipe(kaweth->dev, 0),
 881                                 KAWETH_COMMAND_SET_PACKET_FILTER,
 882                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 883                                 packet_filter_bitmap,
 884                                 0,
 885                                 (void *)&kaweth->scratch,
 886                                 0,
 887                                 KAWETH_CONTROL_TIMEOUT);
 888
 889         if(result < 0) {
 890                 err("Failed to set Rx mode: %d", result);
 891         }
 892         else {
 893                 dbg("Set Rx mode to %d", packet_filter_bitmap);
 894         }
 895         }
 896 }
 897
 898 /****************************************************************
 899  *     kaweth_netdev_stats
 900  ****************************************************************/
 901 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev)
 902 {
 903         struct kaweth_device *kaweth = netdev_priv(dev);
 904         return &kaweth->stats;
 905 }
 906
 907 /****************************************************************
 908  *     kaweth_tx_timeout
 909  ****************************************************************/
 910 static void kaweth_tx_timeout(struct net_device *net)
 911 {
 912         struct kaweth_device *kaweth = netdev_priv(net);
 913
 914         warn("%s: Tx timed out. Resetting.", net->name);
 915         kaweth->stats.tx_errors++;
 916         net->trans_start = jiffies;
 917
 918         usb_unlink_urb(kaweth->tx_urb);
 919 }
 920
 921 /****************************************************************
 922  *     kaweth_suspend
 923  ****************************************************************/
 924 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message)
 925 {
 926         struct kaweth_device *kaweth = usb_get_intfdata(intf);
 927         unsigned long flags;
 928
 929         dbg("Suspending device");
 930         spin_lock_irqsave(&kaweth->device_lock, flags);
 931         kaweth->status |= KAWETH_STATUS_SUSPENDING;
 932         spin_unlock_irqrestore(&kaweth->device_lock, flags);
 933
 934         kaweth_kill_urbs(kaweth);
 935         return 0;
 936 }
 937
 938 /****************************************************************
 939  *     kaweth_resume
 940  ****************************************************************/
 941 static int kaweth_resume(struct usb_interface *intf)
 942 {
 943         struct kaweth_device *kaweth = usb_get_intfdata(intf);
 944         unsigned long flags;
 945
 946         dbg("Resuming device");
 947         spin_lock_irqsave(&kaweth->device_lock, flags);
 948         kaweth->status &= ~KAWETH_STATUS_SUSPENDING;
 949         spin_unlock_irqrestore(&kaweth->device_lock, flags);
 950
 951         if (!kaweth->opened)
 952                 return 0;
 953         kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
 954         kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
 955
 956         return 0;
 957 }
 958
 959 /****************************************************************
 960  *     kaweth_probe
 961  ****************************************************************/
 962 static int kaweth_probe(
 963                 struct usb_interface *intf,
 964                 const struct usb_device_id *id      /* from id_table */
 965         )
 966 {
 967         struct usb_device *dev = interface_to_usbdev(intf);
 968         struct kaweth_device *kaweth;
 969         struct net_device *netdev;
 970         const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 971         int result = 0;
 972
 973         dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x",
 974                  dev->devnum,
 975                  le16_to_cpu(dev->descriptor.idVendor),
 976                  le16_to_cpu(dev->descriptor.idProduct),
 977                  le16_to_cpu(dev->descriptor.bcdDevice));
 978
 979         dbg("Device at %p", dev);
 980
 981         dbg("Descriptor length: %x type: %x",
 982                  (int)dev->descriptor.bLength,
 983                  (int)dev->descriptor.bDescriptorType);
 984
 985         netdev = alloc_etherdev(sizeof(*kaweth));
 986         if (!netdev)
 987                 return -ENOMEM;
 988
 989         kaweth = netdev_priv(netdev);
 990         kaweth->dev = dev;
 991         kaweth->net = netdev;
 992
 993         spin_lock_init(&kaweth->device_lock);
 994         init_waitqueue_head(&kaweth->term_wait);
 995
 996         dbg("Resetting.");
 997
 998         kaweth_reset(kaweth);
 999
1000         /*
1001          * If high byte of bcdDevice is nonzero, firmware is already
1002          * downloaded. Don't try to do it again, or we'll hang the device.
1003          */
1004
1005         if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) {
1006                 info("Firmware present in device.");
1007         } else {
1008                 /* Download the firmware */
1009                 info("Downloading firmware...");
1010                 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
1011                 if ((result = kaweth_download_firmware(kaweth,
1012                                                       kaweth_new_code,
1013                                                       len_kaweth_new_code,
1014                                                       100,
1015                                                       2)) < 0) {
1016                         err("Error downloading firmware (%d)", result);
1017                         goto err_fw;
1018                 }
1019
1020                 if ((result = kaweth_download_firmware(kaweth,
1021                                                       kaweth_new_code_fix,
1022                                                       len_kaweth_new_code_fix,
1023                                                       100,
1024                                                       3)) < 0) {
1025                         err("Error downloading firmware fix (%d)", result);
1026                         goto err_fw;
1027                 }
1028
1029                 if ((result = kaweth_download_firmware(kaweth,
1030                                                       kaweth_trigger_code,
1031                                                       len_kaweth_trigger_code,
1032                                                       126,
1033                                                       2)) < 0) {
1034                         err("Error downloading trigger code (%d)", result);
1035                         goto err_fw;
1036
1037                 }
1038
1039                 if ((result = kaweth_download_firmware(kaweth,
1040                                                       kaweth_trigger_code_fix,
1041                                                       len_kaweth_trigger_code_fix,
1042                                                       126,
1043                                                       3)) < 0) {
1044                         err("Error downloading trigger code fix (%d)", result);
1045                         goto err_fw;
1046                 }
1047
1048
1049                 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
1050                         err("Error triggering firmware (%d)", result);
1051                         goto err_fw;
1052                 }
1053
1054                 /* Device will now disappear for a moment...  */
1055                 info("Firmware loaded.  I'll be back...");
1056 err_fw:
1057                 free_page((unsigned long)kaweth->firmware_buf);
1058                 free_netdev(netdev);
1059                 return -EIO;
1060         }
1061
1062         result = kaweth_read_configuration(kaweth);
1063
1064         if(result < 0) {
1065                 err("Error reading configuration (%d), no net device created", result);
1066                 goto err_free_netdev;
1067         }
1068
1069         info("Statistics collection: %x", kaweth->configuration.statistics_mask);
1070         info("Multicast filter limit: %x", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
1071         info("MTU: %d", le16_to_cpu(kaweth->configuration.segment_size));
1072         info("Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
1073                  (int)kaweth->configuration.hw_addr[0],
1074                  (int)kaweth->configuration.hw_addr[1],
1075                  (int)kaweth->configuration.hw_addr[2],
1076                  (int)kaweth->configuration.hw_addr[3],
1077                  (int)kaweth->configuration.hw_addr[4],
1078                  (int)kaweth->configuration.hw_addr[5]);
1079
1080         if(!memcmp(&kaweth->configuration.hw_addr,
1081                    &bcast_addr,
1082                    sizeof(bcast_addr))) {
1083                 err("Firmware not functioning properly, no net device created");
1084                 goto err_free_netdev;
1085         }
1086
1087         if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
1088                 dbg("Error setting URB size");
1089                 goto err_free_netdev;
1090         }
1091
1092         if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
1093                 err("Error setting SOFS wait");
1094                 goto err_free_netdev;
1095         }
1096
1097         result = kaweth_set_receive_filter(kaweth,
1098                                            KAWETH_PACKET_FILTER_DIRECTED |
1099                                            KAWETH_PACKET_FILTER_BROADCAST |
1100                                            KAWETH_PACKET_FILTER_MULTICAST);
1101
1102         if(result < 0) {
1103                 err("Error setting receive filter");
1104                 goto err_free_netdev;
1105         }
1106
1107         dbg("Initializing net device.");
1108
1109         kaweth->intf = intf;
1110
1111         kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1112         if (!kaweth->tx_urb)
1113                 goto err_free_netdev;
1114         kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1115         if (!kaweth->rx_urb)
1116                 goto err_only_tx;
1117         kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1118         if (!kaweth->irq_urb)
1119                 goto err_tx_and_rx;
1120
1121         kaweth->intbuffer = usb_buffer_alloc(   kaweth->dev,
1122                                                 INTBUFFERSIZE,
1123                                                 GFP_KERNEL,
1124                                                 &kaweth->intbufferhandle);
1125         if (!kaweth->intbuffer)
1126                 goto err_tx_and_rx_and_irq;
1127         kaweth->rx_buf = usb_buffer_alloc(      kaweth->dev,
1128                                                 KAWETH_BUF_SIZE,
1129                                                 GFP_KERNEL,
1130                                                 &kaweth->rxbufferhandle);
1131         if (!kaweth->rx_buf)
1132                 goto err_all_but_rxbuf;
1133
1134         memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr));
1135         memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr,
1136                sizeof(kaweth->configuration.hw_addr));
1137
1138         netdev->open = kaweth_open;
1139         netdev->stop = kaweth_close;
1140
1141         netdev->watchdog_timeo = KAWETH_TX_TIMEOUT;
1142         netdev->tx_timeout = kaweth_tx_timeout;
1143
1144         netdev->hard_start_xmit = kaweth_start_xmit;
1145         netdev->set_multicast_list = kaweth_set_rx_mode;
1146         netdev->get_stats = kaweth_netdev_stats;
1147         netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size);
1148         SET_ETHTOOL_OPS(netdev, &ops);
1149
1150         /* kaweth is zeroed as part of alloc_netdev */
1151
1152         INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl);
1153
1154         usb_set_intfdata(intf, kaweth);
1155
1156 #if 0
1157 // dma_supported() is deeply broken on almost all architectures
1158         if (dma_supported (&intf->dev, 0xffffffffffffffffULL))
1159                 kaweth->net->features |= NETIF_F_HIGHDMA;
1160 #endif
1161
1162         SET_NETDEV_DEV(netdev, &intf->dev);
1163         if (register_netdev(netdev) != 0) {
1164                 err("Error registering netdev.");
1165                 goto err_intfdata;
1166         }
1167
1168         info("kaweth interface created at %s", kaweth->net->name);
1169
1170         dbg("Kaweth probe returning.");
1171
1172         return 0;
1173
1174 err_intfdata:
1175         usb_set_intfdata(intf, NULL);
1176         usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1177 err_all_but_rxbuf:
1178         usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1179 err_tx_and_rx_and_irq:
1180         usb_free_urb(kaweth->irq_urb);
1181 err_tx_and_rx:
1182         usb_free_urb(kaweth->rx_urb);
1183 err_only_tx:
1184         usb_free_urb(kaweth->tx_urb);
1185 err_free_netdev:
1186         free_netdev(netdev);
1187
1188         return -EIO;
1189 }
1190
1191 /****************************************************************
1192  *     kaweth_disconnect
1193  ****************************************************************/
1194 static void kaweth_disconnect(struct usb_interface *intf)
1195 {
1196         struct kaweth_device *kaweth = usb_get_intfdata(intf);
1197         struct net_device *netdev;
1198
1199         info("Unregistering");
1200
1201         usb_set_intfdata(intf, NULL);
1202         if (!kaweth) {
1203                 warn("unregistering non-existant device");
1204                 return;
1205         }
1206         netdev = kaweth->net;
1207
1208         dbg("Unregistering net device");
1209         unregister_netdev(netdev);
1210
1211         usb_free_urb(kaweth->rx_urb);
1212         usb_free_urb(kaweth->tx_urb);
1213         usb_free_urb(kaweth->irq_urb);
1214
1215         usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1216         usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1217
1218         free_netdev(netdev);
1219 }
1220
1221
1222 // FIXME this completion stuff is a modified clone of
1223 // an OLD version of some stuff in usb.c ...
1224 struct usb_api_data {
1225         wait_queue_head_t wqh;
1226         int done;
1227 };
1228
1229 /*-------------------------------------------------------------------*
1230  * completion handler for compatibility wrappers (sync control/bulk) *
1231  *-------------------------------------------------------------------*/
1232 static void usb_api_blocking_completion(struct urb *urb)
1233 {
1234         struct usb_api_data *awd = (struct usb_api_data *)urb->context;
1235
1236         awd->done=1;
1237         wake_up(&awd->wqh);
1238 }
1239
1240 /*-------------------------------------------------------------------*
1241  *                         COMPATIBILITY STUFF                       *
1242  *-------------------------------------------------------------------*/
1243
1244 // Starts urb and waits for completion or timeout
1245 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
1246 {
1247         struct usb_api_data awd;
1248         int status;
1249
1250         init_waitqueue_head(&awd.wqh);
1251         awd.done = 0;
1252
1253         urb->context = &awd;
1254         status = usb_submit_urb(urb, GFP_NOIO);
1255         if (status) {
1256                 // something went wrong
1257                 usb_free_urb(urb);
1258                 return status;
1259         }
1260
1261         if (!wait_event_timeout(awd.wqh, awd.done, timeout)) {
1262                 // timeout
1263                 warn("usb_control/bulk_msg: timeout");
1264                 usb_kill_urb(urb);  // remove urb safely
1265                 status = -ETIMEDOUT;
1266         }
1267         else {
1268                 status = urb->status;
1269         }
1270
1271         if (actual_length) {
1272                 *actual_length = urb->actual_length;
1273         }
1274
1275         usb_free_urb(urb);
1276         return status;
1277 }
1278
1279 /*-------------------------------------------------------------------*/
1280 // returns status (negative) or length (positive)
1281 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
1282                                        unsigned int pipe,
1283                                        struct usb_ctrlrequest *cmd, void *data,
1284                                        int len, int timeout)
1285 {
1286         struct urb *urb;
1287         int retv;
1288         int length = 0; /* shut up GCC */
1289
1290         urb = usb_alloc_urb(0, GFP_NOIO);
1291         if (!urb)
1292                 return -ENOMEM;
1293
1294         usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data,
1295                          len, usb_api_blocking_completion, NULL);
1296
1297         retv = usb_start_wait_urb(urb, timeout, &length);
1298         if (retv < 0) {
1299                 return retv;
1300         }
1301         else {
1302                 return length;
1303         }
1304 }
1305
1306
1307 /****************************************************************
1308  *     kaweth_init
1309  ****************************************************************/
1310 static int __init kaweth_init(void)
1311 {
1312         dbg("Driver loading");
1313         return usb_register(&kaweth_driver);
1314 }
1315
1316 /****************************************************************
1317  *     kaweth_exit
1318  ****************************************************************/
1319 static void __exit kaweth_exit(void)
1320 {
1321         usb_deregister(&kaweth_driver);
1322 }
1323
1324 module_init(kaweth_init);
1325 module_exit(kaweth_exit);
1326
1327
1328
1329
1330
1331
1332
1333
1334