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/semaphore.h>
  62 #include <asm/byteorder.h>
  63
  64 #undef DEBUG
  65
  66 #include "kawethfw.h"
  67
  68 #define KAWETH_MTU                      1514
  69 #define KAWETH_BUF_SIZE                 1664
  70 #define KAWETH_TX_TIMEOUT               (5 * HZ)
  71 #define KAWETH_SCRATCH_SIZE             32
  72 #define KAWETH_FIRMWARE_BUF_SIZE        4096
  73 #define KAWETH_CONTROL_TIMEOUT          (30 * HZ)
  74
  75 #define KAWETH_STATUS_BROKEN            0x0000001
  76 #define KAWETH_STATUS_CLOSING           0x0000002
  77 #define KAWETH_STATUS_SUSPENDING        0x0000004
  78
  79 #define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING)
  80
  81 #define KAWETH_PACKET_FILTER_PROMISCUOUS        0x01
  82 #define KAWETH_PACKET_FILTER_ALL_MULTICAST      0x02
  83 #define KAWETH_PACKET_FILTER_DIRECTED           0x04
  84 #define KAWETH_PACKET_FILTER_BROADCAST          0x08
  85 #define KAWETH_PACKET_FILTER_MULTICAST          0x10
  86
  87 /* Table 7 */
  88 #define KAWETH_COMMAND_GET_ETHERNET_DESC        0x00
  89 #define KAWETH_COMMAND_MULTICAST_FILTERS        0x01
  90 #define KAWETH_COMMAND_SET_PACKET_FILTER        0x02
  91 #define KAWETH_COMMAND_STATISTICS               0x03
  92 #define KAWETH_COMMAND_SET_TEMP_MAC             0x06
  93 #define KAWETH_COMMAND_GET_TEMP_MAC             0x07
  94 #define KAWETH_COMMAND_SET_URB_SIZE             0x08
  95 #define KAWETH_COMMAND_SET_SOFS_WAIT            0x09
  96 #define KAWETH_COMMAND_SCAN                     0xFF
  97
  98 #define KAWETH_SOFS_TO_WAIT                     0x05
  99
 100 #define INTBUFFERSIZE                           4
 101
 102 #define STATE_OFFSET                            0
 103 #define STATE_MASK                              0x40
 104 #define STATE_SHIFT                             5
 105
 106 #define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED)
 107
 108
 109 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>");
 110 MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver");
 111 MODULE_LICENSE("GPL");
 112
 113 static const char driver_name[] = "kaweth";
 114
 115 static int kaweth_probe(
 116                 struct usb_interface *intf,
 117                 const struct usb_device_id *id  /* from id_table */
 118         );
 119 static void kaweth_disconnect(struct usb_interface *intf);
 120 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
 121                                        unsigned int pipe,
 122                                        struct usb_ctrlrequest *cmd, void *data,
 123                                        int len, int timeout);
 124 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message);
 125 static int kaweth_resume(struct usb_interface *intf);
 126
 127 /****************************************************************
 128  *     usb_device_id
 129  ****************************************************************/
 130 static struct usb_device_id usb_klsi_table[] = {
 131         { USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */
 132         { USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */
 133         { USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */
 134         { USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */
 135         { USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */
 136         { USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */
 137         { USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */
 138         { USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */
 139         { USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */
 140         { USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */
 141         { USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */
 142         { USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */
 143         { USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */
 144         { USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */
 145         { USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */
 146         { USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */
 147         { USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */
 148         { USB_DEVICE(0x0846, 0x1001) }, /* NetGear EA-101 */
 149         { USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */
 150         { USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */
 151         { USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */
 152         { USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */
 153         { USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */
 154         { USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */
 155         { USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */
 156         { USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */
 157         { USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */
 158         { USB_DEVICE(0x1485, 0x0001) }, /* Silicom U2E */
 159         { USB_DEVICE(0x1485, 0x0002) }, /* Psion Dacom Gold Port Ethernet */
 160         { USB_DEVICE(0x1645, 0x0005) }, /* Entrega E45 */
 161         { USB_DEVICE(0x1645, 0x0008) }, /* Entrega USB Ethernet Adapter */
 162         { USB_DEVICE(0x1645, 0x8005) }, /* PortGear Ethernet Adapter */
 163         { USB_DEVICE(0x1668, 0x0323) }, /* Actiontec USB Ethernet */
 164         { USB_DEVICE(0x2001, 0x4000) }, /* D-link DSB-650C */
 165         {} /* Null terminator */
 166 };
 167
 168 MODULE_DEVICE_TABLE (usb, usb_klsi_table);
 169
 170 /****************************************************************
 171  *     kaweth_driver
 172  ****************************************************************/
 173 static struct usb_driver kaweth_driver = {
 174         .name =         driver_name,
 175         .probe =        kaweth_probe,
 176         .disconnect =   kaweth_disconnect,
 177         .suspend =      kaweth_suspend,
 178         .resume =       kaweth_resume,
 179         .id_table =     usb_klsi_table,
 180         .supports_autosuspend = 1,
 181 };
 182
 183 typedef __u8 eth_addr_t[6];
 184
 185 /****************************************************************
 186  *     usb_eth_dev
 187  ****************************************************************/
 188 struct usb_eth_dev {
 189         char *name;
 190         __u16 vendor;
 191         __u16 device;
 192         void *pdata;
 193 };
 194
 195 /****************************************************************
 196  *     kaweth_ethernet_configuration
 197  *     Refer Table 8
 198  ****************************************************************/
 199 struct kaweth_ethernet_configuration
 200 {
 201         __u8 size;
 202         __u8 reserved1;
 203         __u8 reserved2;
 204         eth_addr_t hw_addr;
 205         __u32 statistics_mask;
 206         __le16 segment_size;
 207         __u16 max_multicast_filters;
 208         __u8 reserved3;
 209 } __attribute__ ((packed));
 210
 211 /****************************************************************
 212  *     kaweth_device
 213  ****************************************************************/
 214 struct kaweth_device
 215 {
 216         spinlock_t device_lock;
 217
 218         __u32 status;
 219         int end;
 220         int suspend_lowmem_rx;
 221         int suspend_lowmem_ctrl;
 222         int linkstate;
 223         int opened;
 224         struct delayed_work lowmem_work;
 225
 226         struct usb_device *dev;
 227         struct usb_interface *intf;
 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(struct work_struct *work)
 534 {
 535         struct kaweth_device *kaweth =
 536                 container_of(work, struct kaweth_device, lowmem_work.work);
 537
 538         if (IS_BLOCKED(kaweth->status))
 539                 return;
 540
 541         if (kaweth->suspend_lowmem_rx)
 542                 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
 543
 544         if (kaweth->suspend_lowmem_ctrl)
 545                 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
 546 }
 547
 548
 549 /****************************************************************
 550  *     kaweth_resubmit_rx_urb
 551  ****************************************************************/
 552 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth,
 553                                                 gfp_t mem_flags)
 554 {
 555         int result;
 556
 557         usb_fill_bulk_urb(kaweth->rx_urb,
 558                       kaweth->dev,
 559                       usb_rcvbulkpipe(kaweth->dev, 1),
 560                       kaweth->rx_buf,
 561                       KAWETH_BUF_SIZE,
 562                       kaweth_usb_receive,
 563                       kaweth);
 564         kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 565         kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle;
 566
 567         if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) {
 568                 if (result == -ENOMEM) {
 569                         kaweth->suspend_lowmem_rx = 1;
 570                         schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
 571                 }
 572                 err("resubmitting rx_urb %d failed", result);
 573         } else {
 574                 kaweth->suspend_lowmem_rx = 0;
 575         }
 576
 577         return result;
 578 }
 579
 580 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth);
 581
 582 /****************************************************************
 583  *     kaweth_usb_receive
 584  ****************************************************************/
 585 static void kaweth_usb_receive(struct urb *urb)
 586 {
 587         struct kaweth_device *kaweth = urb->context;
 588         struct net_device *net = kaweth->net;
 589
 590         int count = urb->actual_length;
 591         int count2 = urb->transfer_buffer_length;
 592
 593         __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf);
 594
 595         struct sk_buff *skb;
 596
 597         if(unlikely(urb->status == -ECONNRESET || urb->status == -ESHUTDOWN))
 598         /* we are killed - set a flag and wake the disconnect handler */
 599         {
 600                 kaweth->end = 1;
 601                 wake_up(&kaweth->term_wait);
 602                 return;
 603         }
 604
 605         spin_lock(&kaweth->device_lock);
 606         if (IS_BLOCKED(kaweth->status)) {
 607                 spin_unlock(&kaweth->device_lock);
 608                 return;
 609         }
 610         spin_unlock(&kaweth->device_lock);
 611
 612         if(urb->status && urb->status != -EREMOTEIO && count != 1) {
 613                 err("%s RX status: %d count: %d packet_len: %d",
 614                            net->name,
 615                            urb->status,
 616                            count,
 617                            (int)pkt_len);
 618                 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 619                 return;
 620         }
 621
 622         if(kaweth->net && (count > 2)) {
 623                 if(pkt_len > (count - 2)) {
 624                         err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count);
 625                         err("Packet len & 2047: %x", pkt_len & 2047);
 626                         err("Count 2: %x", count2);
 627                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 628                         return;
 629                 }
 630
 631                 if(!(skb = dev_alloc_skb(pkt_len+2))) {
 632                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 633                         return;
 634                 }
 635
 636                 skb_reserve(skb, 2);    /* Align IP on 16 byte boundaries */
 637
 638                 skb_copy_to_linear_data(skb, kaweth->rx_buf + 2, pkt_len);
 639
 640                 skb_put(skb, pkt_len);
 641
 642                 skb->protocol = eth_type_trans(skb, net);
 643
 644                 netif_rx(skb);
 645
 646                 kaweth->stats.rx_packets++;
 647                 kaweth->stats.rx_bytes += pkt_len;
 648         }
 649
 650         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 651 }
 652
 653 /****************************************************************
 654  *     kaweth_open
 655  ****************************************************************/
 656 static int kaweth_open(struct net_device *net)
 657 {
 658         struct kaweth_device *kaweth = netdev_priv(net);
 659         int res;
 660
 661         dbg("Opening network device.");
 662
 663         res = usb_autopm_get_interface(kaweth->intf);
 664         if (res) {
 665                 err("Interface cannot be resumed.");
 666                 return -EIO;
 667         }
 668         res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL);
 669         if (res)
 670                 goto err_out;
 671
 672         usb_fill_int_urb(
 673                 kaweth->irq_urb,
 674                 kaweth->dev,
 675                 usb_rcvintpipe(kaweth->dev, 3),
 676                 kaweth->intbuffer,
 677                 INTBUFFERSIZE,
 678                 int_callback,
 679                 kaweth,
 680                 250); /* overriding the descriptor */
 681         kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle;
 682         kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 683
 684         res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL);
 685         if (res) {
 686                 usb_kill_urb(kaweth->rx_urb);
 687                 goto err_out;
 688         }
 689         kaweth->opened = 1;
 690
 691         netif_start_queue(net);
 692
 693         kaweth_async_set_rx_mode(kaweth);
 694         return 0;
 695
 696 err_out:
 697         usb_autopm_enable(kaweth->intf);
 698         return -EIO;
 699 }
 700
 701 /****************************************************************
 702  *     kaweth_kill_urbs
 703  ****************************************************************/
 704 static void kaweth_kill_urbs(struct kaweth_device *kaweth)
 705 {
 706         usb_kill_urb(kaweth->irq_urb);
 707         usb_kill_urb(kaweth->rx_urb);
 708         usb_kill_urb(kaweth->tx_urb);
 709
 710         flush_scheduled_work();
 711
 712         /* a scheduled work may have resubmitted,
 713            we hit them again */
 714         usb_kill_urb(kaweth->irq_urb);
 715         usb_kill_urb(kaweth->rx_urb);
 716 }
 717
 718 /****************************************************************
 719  *     kaweth_close
 720  ****************************************************************/
 721 static int kaweth_close(struct net_device *net)
 722 {
 723         struct kaweth_device *kaweth = netdev_priv(net);
 724
 725         netif_stop_queue(net);
 726         kaweth->opened = 0;
 727
 728         kaweth->status |= KAWETH_STATUS_CLOSING;
 729
 730         kaweth_kill_urbs(kaweth);
 731
 732         kaweth->status &= ~KAWETH_STATUS_CLOSING;
 733
 734         usb_autopm_enable(kaweth->intf);
 735
 736         return 0;
 737 }
 738
 739 static void kaweth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
 740 {
 741         struct kaweth_device *kaweth = netdev_priv(dev);
 742
 743         strlcpy(info->driver, driver_name, sizeof(info->driver));
 744         usb_make_path(kaweth->dev, info->bus_info, sizeof (info->bus_info));
 745 }
 746
 747 static u32 kaweth_get_link(struct net_device *dev)
 748 {
 749         struct kaweth_device *kaweth = netdev_priv(dev);
 750
 751         return kaweth->linkstate;
 752 }
 753
 754 static struct ethtool_ops ops = {
 755         .get_drvinfo    = kaweth_get_drvinfo,
 756         .get_link       = kaweth_get_link
 757 };
 758
 759 /****************************************************************
 760  *     kaweth_usb_transmit_complete
 761  ****************************************************************/
 762 static void kaweth_usb_transmit_complete(struct urb *urb)
 763 {
 764         struct kaweth_device *kaweth = urb->context;
 765         struct sk_buff *skb = kaweth->tx_skb;
 766
 767         if (unlikely(urb->status != 0))
 768                 if (urb->status != -ENOENT)
 769                         dbg("%s: TX status %d.", kaweth->net->name, urb->status);
 770
 771         netif_wake_queue(kaweth->net);
 772         dev_kfree_skb_irq(skb);
 773 }
 774
 775 /****************************************************************
 776  *     kaweth_start_xmit
 777  ****************************************************************/
 778 static int kaweth_start_xmit(struct sk_buff *skb, struct net_device *net)
 779 {
 780         struct kaweth_device *kaweth = netdev_priv(net);
 781         __le16 *private_header;
 782
 783         int res;
 784
 785         spin_lock(&kaweth->device_lock);
 786
 787         kaweth_async_set_rx_mode(kaweth);
 788         netif_stop_queue(net);
 789         if (IS_BLOCKED(kaweth->status)) {
 790                 goto skip;
 791         }
 792
 793         /* We now decide whether we can put our special header into the sk_buff */
 794         if (skb_cloned(skb) || skb_headroom(skb) < 2) {
 795                 /* no such luck - we make our own */
 796                 struct sk_buff *copied_skb;
 797                 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC);
 798                 dev_kfree_skb_irq(skb);
 799                 skb = copied_skb;
 800                 if (!copied_skb) {
 801                         kaweth->stats.tx_errors++;
 802                         netif_start_queue(net);
 803                         spin_unlock(&kaweth->device_lock);
 804                         return 0;
 805                 }
 806         }
 807
 808         private_header = (__le16 *)__skb_push(skb, 2);
 809         *private_header = cpu_to_le16(skb->len-2);
 810         kaweth->tx_skb = skb;
 811
 812         usb_fill_bulk_urb(kaweth->tx_urb,
 813                       kaweth->dev,
 814                       usb_sndbulkpipe(kaweth->dev, 2),
 815                       private_header,
 816                       skb->len,
 817                       kaweth_usb_transmit_complete,
 818                       kaweth);
 819         kaweth->end = 0;
 820
 821         if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
 822         {
 823                 warn("kaweth failed tx_urb %d", res);
 824 skip:
 825                 kaweth->stats.tx_errors++;
 826
 827                 netif_start_queue(net);
 828                 dev_kfree_skb_irq(skb);
 829         }
 830         else
 831         {
 832                 kaweth->stats.tx_packets++;
 833                 kaweth->stats.tx_bytes += skb->len;
 834                 net->trans_start = jiffies;
 835         }
 836
 837         spin_unlock(&kaweth->device_lock);
 838
 839         return 0;
 840 }
 841
 842 /****************************************************************
 843  *     kaweth_set_rx_mode
 844  ****************************************************************/
 845 static void kaweth_set_rx_mode(struct net_device *net)
 846 {
 847         struct kaweth_device *kaweth = netdev_priv(net);
 848
 849         __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
 850                                      KAWETH_PACKET_FILTER_BROADCAST |
 851                                      KAWETH_PACKET_FILTER_MULTICAST;
 852
 853         dbg("Setting Rx mode to %d", packet_filter_bitmap);
 854
 855         netif_stop_queue(net);
 856
 857         if (net->flags & IFF_PROMISC) {
 858                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
 859         }
 860         else if ((net->mc_count) || (net->flags & IFF_ALLMULTI)) {
 861                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
 862         }
 863
 864         kaweth->packet_filter_bitmap = packet_filter_bitmap;
 865         netif_wake_queue(net);
 866 }
 867
 868 /****************************************************************
 869  *     kaweth_async_set_rx_mode
 870  ****************************************************************/
 871 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
 872 {
 873         __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
 874         kaweth->packet_filter_bitmap = 0;
 875         if (packet_filter_bitmap == 0)
 876                 return;
 877
 878         {
 879         int result;
 880         result = kaweth_control(kaweth,
 881                                 usb_sndctrlpipe(kaweth->dev, 0),
 882                                 KAWETH_COMMAND_SET_PACKET_FILTER,
 883                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 884                                 packet_filter_bitmap,
 885                                 0,
 886                                 (void *)&kaweth->scratch,
 887                                 0,
 888                                 KAWETH_CONTROL_TIMEOUT);
 889
 890         if(result < 0) {
 891                 err("Failed to set Rx mode: %d", result);
 892         }
 893         else {
 894                 dbg("Set Rx mode to %d", packet_filter_bitmap);
 895         }
 896         }
 897 }
 898
 899 /****************************************************************
 900  *     kaweth_netdev_stats
 901  ****************************************************************/
 902 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev)
 903 {
 904         struct kaweth_device *kaweth = netdev_priv(dev);
 905         return &kaweth->stats;
 906 }
 907
 908 /****************************************************************
 909  *     kaweth_tx_timeout
 910  ****************************************************************/
 911 static void kaweth_tx_timeout(struct net_device *net)
 912 {
 913         struct kaweth_device *kaweth = netdev_priv(net);
 914
 915         warn("%s: Tx timed out. Resetting.", net->name);
 916         kaweth->stats.tx_errors++;
 917         net->trans_start = jiffies;
 918
 919         usb_unlink_urb(kaweth->tx_urb);
 920 }
 921
 922 /****************************************************************
 923  *     kaweth_suspend
 924  ****************************************************************/
 925 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message)
 926 {
 927         struct kaweth_device *kaweth = usb_get_intfdata(intf);
 928         unsigned long flags;
 929
 930         dbg("Suspending device");
 931         spin_lock_irqsave(&kaweth->device_lock, flags);
 932         kaweth->status |= KAWETH_STATUS_SUSPENDING;
 933         spin_unlock_irqrestore(&kaweth->device_lock, flags);
 934
 935         kaweth_kill_urbs(kaweth);
 936         return 0;
 937 }
 938
 939 /****************************************************************
 940  *     kaweth_resume
 941  ****************************************************************/
 942 static int kaweth_resume(struct usb_interface *intf)
 943 {
 944         struct kaweth_device *kaweth = usb_get_intfdata(intf);
 945         unsigned long flags;
 946
 947         dbg("Resuming device");
 948         spin_lock_irqsave(&kaweth->device_lock, flags);
 949         kaweth->status &= ~KAWETH_STATUS_SUSPENDING;
 950         spin_unlock_irqrestore(&kaweth->device_lock, flags);
 951
 952         if (!kaweth->opened)
 953                 return 0;
 954         kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
 955         kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
 956
 957         return 0;
 958 }
 959
 960 /****************************************************************
 961  *     kaweth_probe
 962  ****************************************************************/
 963 static int kaweth_probe(
 964                 struct usb_interface *intf,
 965                 const struct usb_device_id *id      /* from id_table */
 966         )
 967 {
 968         struct usb_device *dev = interface_to_usbdev(intf);
 969         struct kaweth_device *kaweth;
 970         struct net_device *netdev;
 971         const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 972         int result = 0;
 973
 974         dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x",
 975                  dev->devnum,
 976                  le16_to_cpu(dev->descriptor.idVendor),
 977                  le16_to_cpu(dev->descriptor.idProduct),
 978                  le16_to_cpu(dev->descriptor.bcdDevice));
 979
 980         dbg("Device at %p", dev);
 981
 982         dbg("Descriptor length: %x type: %x",
 983                  (int)dev->descriptor.bLength,
 984                  (int)dev->descriptor.bDescriptorType);
 985
 986         netdev = alloc_etherdev(sizeof(*kaweth));
 987         if (!netdev)
 988                 return -ENOMEM;
 989
 990         kaweth = netdev_priv(netdev);
 991         kaweth->dev = dev;
 992         kaweth->net = netdev;
 993
 994         spin_lock_init(&kaweth->device_lock);
 995         init_waitqueue_head(&kaweth->term_wait);
 996
 997         dbg("Resetting.");
 998
 999         kaweth_reset(kaweth);
1000
1001         /*
1002          * If high byte of bcdDevice is nonzero, firmware is already
1003          * downloaded. Don't try to do it again, or we'll hang the device.
1004          */
1005
1006         if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) {
1007                 info("Firmware present in device.");
1008         } else {
1009                 /* Download the firmware */
1010                 info("Downloading firmware...");
1011                 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
1012                 if ((result = kaweth_download_firmware(kaweth,
1013                                                       kaweth_new_code,
1014                                                       len_kaweth_new_code,
1015                                                       100,
1016                                                       2)) < 0) {
1017                         err("Error downloading firmware (%d)", result);
1018                         goto err_fw;
1019                 }
1020
1021                 if ((result = kaweth_download_firmware(kaweth,
1022                                                       kaweth_new_code_fix,
1023                                                       len_kaweth_new_code_fix,
1024                                                       100,
1025                                                       3)) < 0) {
1026                         err("Error downloading firmware fix (%d)", result);
1027                         goto err_fw;
1028                 }
1029
1030                 if ((result = kaweth_download_firmware(kaweth,
1031                                                       kaweth_trigger_code,
1032                                                       len_kaweth_trigger_code,
1033                                                       126,
1034                                                       2)) < 0) {
1035                         err("Error downloading trigger code (%d)", result);
1036                         goto err_fw;
1037
1038                 }
1039
1040                 if ((result = kaweth_download_firmware(kaweth,
1041                                                       kaweth_trigger_code_fix,
1042                                                       len_kaweth_trigger_code_fix,
1043                                                       126,
1044                                                       3)) < 0) {
1045                         err("Error downloading trigger code fix (%d)", result);
1046                         goto err_fw;
1047                 }
1048
1049
1050                 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
1051                         err("Error triggering firmware (%d)", result);
1052                         goto err_fw;
1053                 }
1054
1055                 /* Device will now disappear for a moment...  */
1056                 info("Firmware loaded.  I'll be back...");
1057 err_fw:
1058                 free_page((unsigned long)kaweth->firmware_buf);
1059                 free_netdev(netdev);
1060                 return -EIO;
1061         }
1062
1063         result = kaweth_read_configuration(kaweth);
1064
1065         if(result < 0) {
1066                 err("Error reading configuration (%d), no net device created", result);
1067                 goto err_free_netdev;
1068         }
1069
1070         info("Statistics collection: %x", kaweth->configuration.statistics_mask);
1071         info("Multicast filter limit: %x", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
1072         info("MTU: %d", le16_to_cpu(kaweth->configuration.segment_size));
1073         info("Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
1074                  (int)kaweth->configuration.hw_addr[0],
1075                  (int)kaweth->configuration.hw_addr[1],
1076                  (int)kaweth->configuration.hw_addr[2],
1077                  (int)kaweth->configuration.hw_addr[3],
1078                  (int)kaweth->configuration.hw_addr[4],
1079                  (int)kaweth->configuration.hw_addr[5]);
1080
1081         if(!memcmp(&kaweth->configuration.hw_addr,
1082                    &bcast_addr,
1083                    sizeof(bcast_addr))) {
1084                 err("Firmware not functioning properly, no net device created");
1085                 goto err_free_netdev;
1086         }
1087
1088         if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
1089                 dbg("Error setting URB size");
1090                 goto err_free_netdev;
1091         }
1092
1093         if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
1094                 err("Error setting SOFS wait");
1095                 goto err_free_netdev;
1096         }
1097
1098         result = kaweth_set_receive_filter(kaweth,
1099                                            KAWETH_PACKET_FILTER_DIRECTED |
1100                                            KAWETH_PACKET_FILTER_BROADCAST |
1101                                            KAWETH_PACKET_FILTER_MULTICAST);
1102
1103         if(result < 0) {
1104                 err("Error setting receive filter");
1105                 goto err_free_netdev;
1106         }
1107
1108         dbg("Initializing net device.");
1109
1110         kaweth->intf = intf;
1111
1112         kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1113         if (!kaweth->tx_urb)
1114                 goto err_free_netdev;
1115         kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1116         if (!kaweth->rx_urb)
1117                 goto err_only_tx;
1118         kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1119         if (!kaweth->irq_urb)
1120                 goto err_tx_and_rx;
1121
1122         kaweth->intbuffer = usb_buffer_alloc(   kaweth->dev,
1123                                                 INTBUFFERSIZE,
1124                                                 GFP_KERNEL,
1125                                                 &kaweth->intbufferhandle);
1126         if (!kaweth->intbuffer)
1127                 goto err_tx_and_rx_and_irq;
1128         kaweth->rx_buf = usb_buffer_alloc(      kaweth->dev,
1129                                                 KAWETH_BUF_SIZE,
1130                                                 GFP_KERNEL,
1131                                                 &kaweth->rxbufferhandle);
1132         if (!kaweth->rx_buf)
1133                 goto err_all_but_rxbuf;
1134
1135         memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr));
1136         memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr,
1137                sizeof(kaweth->configuration.hw_addr));
1138
1139         netdev->open = kaweth_open;
1140         netdev->stop = kaweth_close;
1141
1142         netdev->watchdog_timeo = KAWETH_TX_TIMEOUT;
1143         netdev->tx_timeout = kaweth_tx_timeout;
1144
1145         netdev->hard_start_xmit = kaweth_start_xmit;
1146         netdev->set_multicast_list = kaweth_set_rx_mode;
1147         netdev->get_stats = kaweth_netdev_stats;
1148         netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size);
1149         SET_ETHTOOL_OPS(netdev, &ops);
1150
1151         /* kaweth is zeroed as part of alloc_netdev */
1152
1153         INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl);
1154
1155         SET_MODULE_OWNER(netdev);
1156
1157         usb_set_intfdata(intf, kaweth);
1158
1159 #if 0
1160 // dma_supported() is deeply broken on almost all architectures
1161         if (dma_supported (&intf->dev, 0xffffffffffffffffULL))
1162                 kaweth->net->features |= NETIF_F_HIGHDMA;
1163 #endif
1164
1165         SET_NETDEV_DEV(netdev, &intf->dev);
1166         if (register_netdev(netdev) != 0) {
1167                 err("Error registering netdev.");
1168                 goto err_intfdata;
1169         }
1170
1171         info("kaweth interface created at %s", kaweth->net->name);
1172
1173         dbg("Kaweth probe returning.");
1174
1175         return 0;
1176
1177 err_intfdata:
1178         usb_set_intfdata(intf, NULL);
1179         usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1180 err_all_but_rxbuf:
1181         usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1182 err_tx_and_rx_and_irq:
1183         usb_free_urb(kaweth->irq_urb);
1184 err_tx_and_rx:
1185         usb_free_urb(kaweth->rx_urb);
1186 err_only_tx:
1187         usb_free_urb(kaweth->tx_urb);
1188 err_free_netdev:
1189         free_netdev(netdev);
1190
1191         return -EIO;
1192 }
1193
1194 /****************************************************************
1195  *     kaweth_disconnect
1196  ****************************************************************/
1197 static void kaweth_disconnect(struct usb_interface *intf)
1198 {
1199         struct kaweth_device *kaweth = usb_get_intfdata(intf);
1200         struct net_device *netdev;
1201
1202         info("Unregistering");
1203
1204         usb_set_intfdata(intf, NULL);
1205         if (!kaweth) {
1206                 warn("unregistering non-existant device");
1207                 return;
1208         }
1209         netdev = kaweth->net;
1210
1211         dbg("Unregistering net device");
1212         unregister_netdev(netdev);
1213
1214         usb_free_urb(kaweth->rx_urb);
1215         usb_free_urb(kaweth->tx_urb);
1216         usb_free_urb(kaweth->irq_urb);
1217
1218         usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1219         usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1220
1221         free_netdev(netdev);
1222 }
1223
1224
1225 // FIXME this completion stuff is a modified clone of
1226 // an OLD version of some stuff in usb.c ...
1227 struct usb_api_data {
1228         wait_queue_head_t wqh;
1229         int done;
1230 };
1231
1232 /*-------------------------------------------------------------------*
1233  * completion handler for compatibility wrappers (sync control/bulk) *
1234  *-------------------------------------------------------------------*/
1235 static void usb_api_blocking_completion(struct urb *urb)
1236 {
1237         struct usb_api_data *awd = (struct usb_api_data *)urb->context;
1238
1239         awd->done=1;
1240         wake_up(&awd->wqh);
1241 }
1242
1243 /*-------------------------------------------------------------------*
1244  *                         COMPATIBILITY STUFF                       *
1245  *-------------------------------------------------------------------*/
1246
1247 // Starts urb and waits for completion or timeout
1248 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
1249 {
1250         struct usb_api_data awd;
1251         int status;
1252
1253         init_waitqueue_head(&awd.wqh);
1254         awd.done = 0;
1255
1256         urb->context = &awd;
1257         status = usb_submit_urb(urb, GFP_NOIO);
1258         if (status) {
1259                 // something went wrong
1260                 usb_free_urb(urb);
1261                 return status;
1262         }
1263
1264         if (!wait_event_timeout(awd.wqh, awd.done, timeout)) {
1265                 // timeout
1266                 warn("usb_control/bulk_msg: timeout");
1267                 usb_kill_urb(urb);  // remove urb safely
1268                 status = -ETIMEDOUT;
1269         }
1270         else {
1271                 status = urb->status;
1272         }
1273
1274         if (actual_length) {
1275                 *actual_length = urb->actual_length;
1276         }
1277
1278         usb_free_urb(urb);
1279         return status;
1280 }
1281
1282 /*-------------------------------------------------------------------*/
1283 // returns status (negative) or length (positive)
1284 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
1285                                        unsigned int pipe,
1286                                        struct usb_ctrlrequest *cmd, void *data,
1287                                        int len, int timeout)
1288 {
1289         struct urb *urb;
1290         int retv;
1291         int length = 0; /* shut up GCC */
1292
1293         urb = usb_alloc_urb(0, GFP_NOIO);
1294         if (!urb)
1295                 return -ENOMEM;
1296
1297         usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data,
1298                          len, usb_api_blocking_completion, NULL);
1299
1300         retv = usb_start_wait_urb(urb, timeout, &length);
1301         if (retv < 0) {
1302                 return retv;
1303         }
1304         else {
1305                 return length;
1306         }
1307 }
1308
1309
1310 /****************************************************************
1311  *     kaweth_init
1312  ****************************************************************/
1313 static int __init kaweth_init(void)
1314 {
1315         dbg("Driver loading");
1316         return usb_register(&kaweth_driver);
1317 }
1318
1319 /****************************************************************
1320  *     kaweth_exit
1321  ****************************************************************/
1322 static void __exit kaweth_exit(void)
1323 {
1324         usb_deregister(&kaweth_driver);
1325 }
1326
1327 module_init(kaweth_init);
1328 module_exit(kaweth_exit);
1329
1330
1331
1332
1333
1334
1335
1336
1337