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 <linux/firmware.h>
  61 #include <asm/uaccess.h>
  62 #include <asm/byteorder.h>
  63
  64 #undef DEBUG
  65
  66 #define KAWETH_MTU                      1514
  67 #define KAWETH_BUF_SIZE                 1664
  68 #define KAWETH_TX_TIMEOUT               (5 * HZ)
  69 #define KAWETH_SCRATCH_SIZE             32
  70 #define KAWETH_FIRMWARE_BUF_SIZE        4096
  71 #define KAWETH_CONTROL_TIMEOUT          (30000)
  72
  73 #define KAWETH_STATUS_BROKEN            0x0000001
  74 #define KAWETH_STATUS_CLOSING           0x0000002
  75 #define KAWETH_STATUS_SUSPENDING        0x0000004
  76
  77 #define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING)
  78
  79 #define KAWETH_PACKET_FILTER_PROMISCUOUS        0x01
  80 #define KAWETH_PACKET_FILTER_ALL_MULTICAST      0x02
  81 #define KAWETH_PACKET_FILTER_DIRECTED           0x04
  82 #define KAWETH_PACKET_FILTER_BROADCAST          0x08
  83 #define KAWETH_PACKET_FILTER_MULTICAST          0x10
  84
  85 /* Table 7 */
  86 #define KAWETH_COMMAND_GET_ETHERNET_DESC        0x00
  87 #define KAWETH_COMMAND_MULTICAST_FILTERS        0x01
  88 #define KAWETH_COMMAND_SET_PACKET_FILTER        0x02
  89 #define KAWETH_COMMAND_STATISTICS               0x03
  90 #define KAWETH_COMMAND_SET_TEMP_MAC             0x06
  91 #define KAWETH_COMMAND_GET_TEMP_MAC             0x07
  92 #define KAWETH_COMMAND_SET_URB_SIZE             0x08
  93 #define KAWETH_COMMAND_SET_SOFS_WAIT            0x09
  94 #define KAWETH_COMMAND_SCAN                     0xFF
  95
  96 #define KAWETH_SOFS_TO_WAIT                     0x05
  97
  98 #define INTBUFFERSIZE                           4
  99
 100 #define STATE_OFFSET                            0
 101 #define STATE_MASK                              0x40
 102 #define STATE_SHIFT                             5
 103
 104 #define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED)
 105
 106
 107 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>");
 108 MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver");
 109 MODULE_LICENSE("GPL");
 110 MODULE_FIRMWARE("kaweth/new_code.bin");
 111 MODULE_FIRMWARE("kaweth/new_code_fix.bin");
 112 MODULE_FIRMWARE("kaweth/trigger_code.bin");
 113 MODULE_FIRMWARE("kaweth/trigger_code_fix.bin");
 114
 115 static const char driver_name[] = "kaweth";
 116
 117 static int kaweth_probe(
 118                 struct usb_interface *intf,
 119                 const struct usb_device_id *id  /* from id_table */
 120         );
 121 static void kaweth_disconnect(struct usb_interface *intf);
 122 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
 123                                        unsigned int pipe,
 124                                        struct usb_ctrlrequest *cmd, void *data,
 125                                        int len, int timeout);
 126 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message);
 127 static int kaweth_resume(struct usb_interface *intf);
 128
 129 /****************************************************************
 130  *     usb_device_id
 131  ****************************************************************/
 132 static struct usb_device_id usb_klsi_table[] = {
 133         { USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */
 134         { USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */
 135         { USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */
 136         { USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */
 137         { USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */
 138         { USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */
 139         { USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */
 140         { USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */
 141         { USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */
 142         { USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */
 143         { USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */
 144         { USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */
 145         { USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */
 146         { USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */
 147         { USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */
 148         { USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */
 149         { USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */
 150         { USB_DEVICE(0x0846, 0x1001) }, /* NetGear EA-101 */
 151         { USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */
 152         { USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */
 153         { USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */
 154         { USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */
 155         { USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */
 156         { USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */
 157         { USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */
 158         { USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */
 159         { USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */
 160         { USB_DEVICE(0x1485, 0x0001) }, /* Silicom U2E */
 161         { USB_DEVICE(0x1485, 0x0002) }, /* Psion Dacom Gold Port Ethernet */
 162         { USB_DEVICE(0x1645, 0x0005) }, /* Entrega E45 */
 163         { USB_DEVICE(0x1645, 0x0008) }, /* Entrega USB Ethernet Adapter */
 164         { USB_DEVICE(0x1645, 0x8005) }, /* PortGear Ethernet Adapter */
 165         { USB_DEVICE(0x1668, 0x0323) }, /* Actiontec USB Ethernet */
 166         { USB_DEVICE(0x2001, 0x4000) }, /* D-link DSB-650C */
 167         {} /* Null terminator */
 168 };
 169
 170 MODULE_DEVICE_TABLE (usb, usb_klsi_table);
 171
 172 /****************************************************************
 173  *     kaweth_driver
 174  ****************************************************************/
 175 static struct usb_driver kaweth_driver = {
 176         .name =         driver_name,
 177         .probe =        kaweth_probe,
 178         .disconnect =   kaweth_disconnect,
 179         .suspend =      kaweth_suspend,
 180         .resume =       kaweth_resume,
 181         .id_table =     usb_klsi_table,
 182         .supports_autosuspend = 1,
 183 };
 184
 185 typedef __u8 eth_addr_t[6];
 186
 187 /****************************************************************
 188  *     usb_eth_dev
 189  ****************************************************************/
 190 struct usb_eth_dev {
 191         char *name;
 192         __u16 vendor;
 193         __u16 device;
 194         void *pdata;
 195 };
 196
 197 /****************************************************************
 198  *     kaweth_ethernet_configuration
 199  *     Refer Table 8
 200  ****************************************************************/
 201 struct kaweth_ethernet_configuration
 202 {
 203         __u8 size;
 204         __u8 reserved1;
 205         __u8 reserved2;
 206         eth_addr_t hw_addr;
 207         __u32 statistics_mask;
 208         __le16 segment_size;
 209         __u16 max_multicast_filters;
 210         __u8 reserved3;
 211 } __attribute__ ((packed));
 212
 213 /****************************************************************
 214  *     kaweth_device
 215  ****************************************************************/
 216 struct kaweth_device
 217 {
 218         spinlock_t device_lock;
 219
 220         __u32 status;
 221         int end;
 222         int suspend_lowmem_rx;
 223         int suspend_lowmem_ctrl;
 224         int linkstate;
 225         int opened;
 226         struct delayed_work lowmem_work;
 227
 228         struct usb_device *dev;
 229         struct usb_interface *intf;
 230         struct net_device *net;
 231         wait_queue_head_t term_wait;
 232
 233         struct urb *rx_urb;
 234         struct urb *tx_urb;
 235         struct urb *irq_urb;
 236
 237         dma_addr_t intbufferhandle;
 238         __u8 *intbuffer;
 239         dma_addr_t rxbufferhandle;
 240         __u8 *rx_buf;
 241
 242
 243         struct sk_buff *tx_skb;
 244
 245         __u8 *firmware_buf;
 246         __u8 scratch[KAWETH_SCRATCH_SIZE];
 247         __u16 packet_filter_bitmap;
 248
 249         struct kaweth_ethernet_configuration configuration;
 250
 251         struct net_device_stats stats;
 252 };
 253
 254 /****************************************************************
 255  *     kaweth_control
 256  ****************************************************************/
 257 static int kaweth_control(struct kaweth_device *kaweth,
 258                           unsigned int pipe,
 259                           __u8 request,
 260                           __u8 requesttype,
 261                           __u16 value,
 262                           __u16 index,
 263                           void *data,
 264                           __u16 size,
 265                           int timeout)
 266 {
 267         struct usb_ctrlrequest *dr;
 268
 269         dbg("kaweth_control()");
 270
 271         if(in_interrupt()) {
 272                 dbg("in_interrupt()");
 273                 return -EBUSY;
 274         }
 275
 276         dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
 277
 278         if (!dr) {
 279                 dbg("kmalloc() failed");
 280                 return -ENOMEM;
 281         }
 282
 283         dr->bRequestType= requesttype;
 284         dr->bRequest = request;
 285         dr->wValue = cpu_to_le16(value);
 286         dr->wIndex = cpu_to_le16(index);
 287         dr->wLength = cpu_to_le16(size);
 288
 289         return kaweth_internal_control_msg(kaweth->dev,
 290                                         pipe,
 291                                         dr,
 292                                         data,
 293                                         size,
 294                                         timeout);
 295 }
 296
 297 /****************************************************************
 298  *     kaweth_read_configuration
 299  ****************************************************************/
 300 static int kaweth_read_configuration(struct kaweth_device *kaweth)
 301 {
 302         int retval;
 303
 304         dbg("Reading kaweth configuration");
 305
 306         retval = kaweth_control(kaweth,
 307                                 usb_rcvctrlpipe(kaweth->dev, 0),
 308                                 KAWETH_COMMAND_GET_ETHERNET_DESC,
 309                                 USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE,
 310                                 0,
 311                                 0,
 312                                 (void *)&kaweth->configuration,
 313                                 sizeof(kaweth->configuration),
 314                                 KAWETH_CONTROL_TIMEOUT);
 315
 316         return retval;
 317 }
 318
 319 /****************************************************************
 320  *     kaweth_set_urb_size
 321  ****************************************************************/
 322 static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size)
 323 {
 324         int retval;
 325
 326         dbg("Setting URB size to %d", (unsigned)urb_size);
 327
 328         retval = kaweth_control(kaweth,
 329                                 usb_sndctrlpipe(kaweth->dev, 0),
 330                                 KAWETH_COMMAND_SET_URB_SIZE,
 331                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 332                                 urb_size,
 333                                 0,
 334                                 (void *)&kaweth->scratch,
 335                                 0,
 336                                 KAWETH_CONTROL_TIMEOUT);
 337
 338         return retval;
 339 }
 340
 341 /****************************************************************
 342  *     kaweth_set_sofs_wait
 343  ****************************************************************/
 344 static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait)
 345 {
 346         int retval;
 347
 348         dbg("Set SOFS wait to %d", (unsigned)sofs_wait);
 349
 350         retval = kaweth_control(kaweth,
 351                                 usb_sndctrlpipe(kaweth->dev, 0),
 352                                 KAWETH_COMMAND_SET_SOFS_WAIT,
 353                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 354                                 sofs_wait,
 355                                 0,
 356                                 (void *)&kaweth->scratch,
 357                                 0,
 358                                 KAWETH_CONTROL_TIMEOUT);
 359
 360         return retval;
 361 }
 362
 363 /****************************************************************
 364  *     kaweth_set_receive_filter
 365  ****************************************************************/
 366 static int kaweth_set_receive_filter(struct kaweth_device *kaweth,
 367                                      __u16 receive_filter)
 368 {
 369         int retval;
 370
 371         dbg("Set receive filter to %d", (unsigned)receive_filter);
 372
 373         retval = kaweth_control(kaweth,
 374                                 usb_sndctrlpipe(kaweth->dev, 0),
 375                                 KAWETH_COMMAND_SET_PACKET_FILTER,
 376                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 377                                 receive_filter,
 378                                 0,
 379                                 (void *)&kaweth->scratch,
 380                                 0,
 381                                 KAWETH_CONTROL_TIMEOUT);
 382
 383         return retval;
 384 }
 385
 386 /****************************************************************
 387  *     kaweth_download_firmware
 388  ****************************************************************/
 389 static int kaweth_download_firmware(struct kaweth_device *kaweth,
 390                                     const char *fwname,
 391                                     __u8 interrupt,
 392                                     __u8 type)
 393 {
 394         const struct firmware *fw;
 395         int data_len;
 396         int ret;
 397
 398         ret = request_firmware(&fw, fwname, &kaweth->dev->dev);
 399         if (ret) {
 400                 err("Firmware request failed\n");
 401                 return ret;
 402         }
 403
 404         if (fw->size > KAWETH_FIRMWARE_BUF_SIZE) {
 405                 err("Firmware too big: %zu", fw->size);
 406                 return -ENOSPC;
 407         }
 408         data_len = fw->size;
 409         memcpy(kaweth->firmware_buf, fw->data, fw->size);
 410
 411         release_firmware(fw);
 412
 413         kaweth->firmware_buf[2] = (data_len & 0xFF) - 7;
 414         kaweth->firmware_buf[3] = data_len >> 8;
 415         kaweth->firmware_buf[4] = type;
 416         kaweth->firmware_buf[5] = interrupt;
 417
 418         dbg("High: %i, Low:%i", kaweth->firmware_buf[3],
 419                    kaweth->firmware_buf[2]);
 420
 421         dbg("Downloading firmware at %p to kaweth device at %p",
 422             fw->data, kaweth);
 423         dbg("Firmware length: %d", data_len);
 424
 425         return kaweth_control(kaweth,
 426                               usb_sndctrlpipe(kaweth->dev, 0),
 427                               KAWETH_COMMAND_SCAN,
 428                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 429                               0,
 430                               0,
 431                               (void *)kaweth->firmware_buf,
 432                               data_len,
 433                               KAWETH_CONTROL_TIMEOUT);
 434 }
 435
 436 /****************************************************************
 437  *     kaweth_trigger_firmware
 438  ****************************************************************/
 439 static int kaweth_trigger_firmware(struct kaweth_device *kaweth,
 440                                    __u8 interrupt)
 441 {
 442         kaweth->firmware_buf[0] = 0xB6;
 443         kaweth->firmware_buf[1] = 0xC3;
 444         kaweth->firmware_buf[2] = 0x01;
 445         kaweth->firmware_buf[3] = 0x00;
 446         kaweth->firmware_buf[4] = 0x06;
 447         kaweth->firmware_buf[5] = interrupt;
 448         kaweth->firmware_buf[6] = 0x00;
 449         kaweth->firmware_buf[7] = 0x00;
 450
 451         dbg("Triggering firmware");
 452
 453         return kaweth_control(kaweth,
 454                               usb_sndctrlpipe(kaweth->dev, 0),
 455                               KAWETH_COMMAND_SCAN,
 456                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 457                               0,
 458                               0,
 459                               (void *)kaweth->firmware_buf,
 460                               8,
 461                               KAWETH_CONTROL_TIMEOUT);
 462 }
 463
 464 /****************************************************************
 465  *     kaweth_reset
 466  ****************************************************************/
 467 static int kaweth_reset(struct kaweth_device *kaweth)
 468 {
 469         int result;
 470
 471         dbg("kaweth_reset(%p)", kaweth);
 472         result = kaweth_control(kaweth,
 473                                 usb_sndctrlpipe(kaweth->dev, 0),
 474                                 USB_REQ_SET_CONFIGURATION,
 475                                 0,
 476                                 kaweth->dev->config[0].desc.bConfigurationValue,
 477                                 0,
 478                                 NULL,
 479                                 0,
 480                                 KAWETH_CONTROL_TIMEOUT);
 481
 482         mdelay(10);
 483
 484         dbg("kaweth_reset() returns %d.",result);
 485
 486         return result;
 487 }
 488
 489 static void kaweth_usb_receive(struct urb *);
 490 static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t);
 491
 492 /****************************************************************
 493         int_callback
 494 *****************************************************************/
 495
 496 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf)
 497 {
 498         int status;
 499
 500         status = usb_submit_urb (kaweth->irq_urb, mf);
 501         if (unlikely(status == -ENOMEM)) {
 502                 kaweth->suspend_lowmem_ctrl = 1;
 503                 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
 504         } else {
 505                 kaweth->suspend_lowmem_ctrl = 0;
 506         }
 507
 508         if (status)
 509                 err ("can't resubmit intr, %s-%s, status %d",
 510                                 kaweth->dev->bus->bus_name,
 511                                 kaweth->dev->devpath, status);
 512 }
 513
 514 static void int_callback(struct urb *u)
 515 {
 516         struct kaweth_device *kaweth = u->context;
 517         int act_state;
 518         int status = u->status;
 519
 520         switch (status) {
 521         case 0:                 /* success */
 522                 break;
 523         case -ECONNRESET:       /* unlink */
 524         case -ENOENT:
 525         case -ESHUTDOWN:
 526                 return;
 527         /* -EPIPE:  should clear the halt */
 528         default:                /* error */
 529                 goto resubmit;
 530         }
 531
 532         /* we check the link state to report changes */
 533         if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) {
 534                 if (act_state)
 535                         netif_carrier_on(kaweth->net);
 536                 else
 537                         netif_carrier_off(kaweth->net);
 538
 539                 kaweth->linkstate = act_state;
 540         }
 541 resubmit:
 542         kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC);
 543 }
 544
 545 static void kaweth_resubmit_tl(struct work_struct *work)
 546 {
 547         struct kaweth_device *kaweth =
 548                 container_of(work, struct kaweth_device, lowmem_work.work);
 549
 550         if (IS_BLOCKED(kaweth->status))
 551                 return;
 552
 553         if (kaweth->suspend_lowmem_rx)
 554                 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
 555
 556         if (kaweth->suspend_lowmem_ctrl)
 557                 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
 558 }
 559
 560
 561 /****************************************************************
 562  *     kaweth_resubmit_rx_urb
 563  ****************************************************************/
 564 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth,
 565                                                 gfp_t mem_flags)
 566 {
 567         int result;
 568
 569         usb_fill_bulk_urb(kaweth->rx_urb,
 570                       kaweth->dev,
 571                       usb_rcvbulkpipe(kaweth->dev, 1),
 572                       kaweth->rx_buf,
 573                       KAWETH_BUF_SIZE,
 574                       kaweth_usb_receive,
 575                       kaweth);
 576         kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 577         kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle;
 578
 579         if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) {
 580                 if (result == -ENOMEM) {
 581                         kaweth->suspend_lowmem_rx = 1;
 582                         schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
 583                 }
 584                 err("resubmitting rx_urb %d failed", result);
 585         } else {
 586                 kaweth->suspend_lowmem_rx = 0;
 587         }
 588
 589         return result;
 590 }
 591
 592 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth);
 593
 594 /****************************************************************
 595  *     kaweth_usb_receive
 596  ****************************************************************/
 597 static void kaweth_usb_receive(struct urb *urb)
 598 {
 599         struct kaweth_device *kaweth = urb->context;
 600         struct net_device *net = kaweth->net;
 601         int status = urb->status;
 602
 603         int count = urb->actual_length;
 604         int count2 = urb->transfer_buffer_length;
 605
 606         __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf);
 607
 608         struct sk_buff *skb;
 609
 610         if(unlikely(status == -ECONNRESET || status == -ESHUTDOWN))
 611         /* we are killed - set a flag and wake the disconnect handler */
 612         {
 613                 kaweth->end = 1;
 614                 wake_up(&kaweth->term_wait);
 615                 return;
 616         }
 617
 618         spin_lock(&kaweth->device_lock);
 619         if (IS_BLOCKED(kaweth->status)) {
 620                 spin_unlock(&kaweth->device_lock);
 621                 return;
 622         }
 623         spin_unlock(&kaweth->device_lock);
 624
 625         if(status && status != -EREMOTEIO && count != 1) {
 626                 err("%s RX status: %d count: %d packet_len: %d",
 627                            net->name,
 628                            status,
 629                            count,
 630                            (int)pkt_len);
 631                 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 632                 return;
 633         }
 634
 635         if(kaweth->net && (count > 2)) {
 636                 if(pkt_len > (count - 2)) {
 637                         err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count);
 638                         err("Packet len & 2047: %x", pkt_len & 2047);
 639                         err("Count 2: %x", count2);
 640                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 641                         return;
 642                 }
 643
 644                 if(!(skb = dev_alloc_skb(pkt_len+2))) {
 645                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 646                         return;
 647                 }
 648
 649                 skb_reserve(skb, 2);    /* Align IP on 16 byte boundaries */
 650
 651                 skb_copy_to_linear_data(skb, kaweth->rx_buf + 2, pkt_len);
 652
 653                 skb_put(skb, pkt_len);
 654
 655                 skb->protocol = eth_type_trans(skb, net);
 656
 657                 netif_rx(skb);
 658
 659                 kaweth->stats.rx_packets++;
 660                 kaweth->stats.rx_bytes += pkt_len;
 661         }
 662
 663         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 664 }
 665
 666 /****************************************************************
 667  *     kaweth_open
 668  ****************************************************************/
 669 static int kaweth_open(struct net_device *net)
 670 {
 671         struct kaweth_device *kaweth = netdev_priv(net);
 672         int res;
 673
 674         dbg("Opening network device.");
 675
 676         res = usb_autopm_get_interface(kaweth->intf);
 677         if (res) {
 678                 err("Interface cannot be resumed.");
 679                 return -EIO;
 680         }
 681         res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL);
 682         if (res)
 683                 goto err_out;
 684
 685         usb_fill_int_urb(
 686                 kaweth->irq_urb,
 687                 kaweth->dev,
 688                 usb_rcvintpipe(kaweth->dev, 3),
 689                 kaweth->intbuffer,
 690                 INTBUFFERSIZE,
 691                 int_callback,
 692                 kaweth,
 693                 250); /* overriding the descriptor */
 694         kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle;
 695         kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 696
 697         res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL);
 698         if (res) {
 699                 usb_kill_urb(kaweth->rx_urb);
 700                 goto err_out;
 701         }
 702         kaweth->opened = 1;
 703
 704         netif_start_queue(net);
 705
 706         kaweth_async_set_rx_mode(kaweth);
 707         return 0;
 708
 709 err_out:
 710         usb_autopm_enable(kaweth->intf);
 711         return -EIO;
 712 }
 713
 714 /****************************************************************
 715  *     kaweth_kill_urbs
 716  ****************************************************************/
 717 static void kaweth_kill_urbs(struct kaweth_device *kaweth)
 718 {
 719         usb_kill_urb(kaweth->irq_urb);
 720         usb_kill_urb(kaweth->rx_urb);
 721         usb_kill_urb(kaweth->tx_urb);
 722
 723         cancel_delayed_work_sync(&kaweth->lowmem_work);
 724
 725         /* a scheduled work may have resubmitted,
 726            we hit them again */
 727         usb_kill_urb(kaweth->irq_urb);
 728         usb_kill_urb(kaweth->rx_urb);
 729 }
 730
 731 /****************************************************************
 732  *     kaweth_close
 733  ****************************************************************/
 734 static int kaweth_close(struct net_device *net)
 735 {
 736         struct kaweth_device *kaweth = netdev_priv(net);
 737
 738         netif_stop_queue(net);
 739         kaweth->opened = 0;
 740
 741         kaweth->status |= KAWETH_STATUS_CLOSING;
 742
 743         kaweth_kill_urbs(kaweth);
 744
 745         kaweth->status &= ~KAWETH_STATUS_CLOSING;
 746
 747         usb_autopm_enable(kaweth->intf);
 748
 749         return 0;
 750 }
 751
 752 static void kaweth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
 753 {
 754         struct kaweth_device *kaweth = netdev_priv(dev);
 755
 756         strlcpy(info->driver, driver_name, sizeof(info->driver));
 757         usb_make_path(kaweth->dev, info->bus_info, sizeof (info->bus_info));
 758 }
 759
 760 static u32 kaweth_get_link(struct net_device *dev)
 761 {
 762         struct kaweth_device *kaweth = netdev_priv(dev);
 763
 764         return kaweth->linkstate;
 765 }
 766
 767 static struct ethtool_ops ops = {
 768         .get_drvinfo    = kaweth_get_drvinfo,
 769         .get_link       = kaweth_get_link
 770 };
 771
 772 /****************************************************************
 773  *     kaweth_usb_transmit_complete
 774  ****************************************************************/
 775 static void kaweth_usb_transmit_complete(struct urb *urb)
 776 {
 777         struct kaweth_device *kaweth = urb->context;
 778         struct sk_buff *skb = kaweth->tx_skb;
 779         int status = urb->status;
 780
 781         if (unlikely(status != 0))
 782                 if (status != -ENOENT)
 783                         dbg("%s: TX status %d.", kaweth->net->name, status);
 784
 785         netif_wake_queue(kaweth->net);
 786         dev_kfree_skb_irq(skb);
 787 }
 788
 789 /****************************************************************
 790  *     kaweth_start_xmit
 791  ****************************************************************/
 792 static int kaweth_start_xmit(struct sk_buff *skb, struct net_device *net)
 793 {
 794         struct kaweth_device *kaweth = netdev_priv(net);
 795         __le16 *private_header;
 796
 797         int res;
 798
 799         spin_lock(&kaweth->device_lock);
 800
 801         kaweth_async_set_rx_mode(kaweth);
 802         netif_stop_queue(net);
 803         if (IS_BLOCKED(kaweth->status)) {
 804                 goto skip;
 805         }
 806
 807         /* We now decide whether we can put our special header into the sk_buff */
 808         if (skb_cloned(skb) || skb_headroom(skb) < 2) {
 809                 /* no such luck - we make our own */
 810                 struct sk_buff *copied_skb;
 811                 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC);
 812                 dev_kfree_skb_irq(skb);
 813                 skb = copied_skb;
 814                 if (!copied_skb) {
 815                         kaweth->stats.tx_errors++;
 816                         netif_start_queue(net);
 817                         spin_unlock(&kaweth->device_lock);
 818                         return 0;
 819                 }
 820         }
 821
 822         private_header = (__le16 *)__skb_push(skb, 2);
 823         *private_header = cpu_to_le16(skb->len-2);
 824         kaweth->tx_skb = skb;
 825
 826         usb_fill_bulk_urb(kaweth->tx_urb,
 827                       kaweth->dev,
 828                       usb_sndbulkpipe(kaweth->dev, 2),
 829                       private_header,
 830                       skb->len,
 831                       kaweth_usb_transmit_complete,
 832                       kaweth);
 833         kaweth->end = 0;
 834
 835         if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
 836         {
 837                 dev_warn(&net->dev, "kaweth failed tx_urb %d\n", res);
 838 skip:
 839                 kaweth->stats.tx_errors++;
 840
 841                 netif_start_queue(net);
 842                 dev_kfree_skb_irq(skb);
 843         }
 844         else
 845         {
 846                 kaweth->stats.tx_packets++;
 847                 kaweth->stats.tx_bytes += skb->len;
 848                 net->trans_start = jiffies;
 849         }
 850
 851         spin_unlock(&kaweth->device_lock);
 852
 853         return 0;
 854 }
 855
 856 /****************************************************************
 857  *     kaweth_set_rx_mode
 858  ****************************************************************/
 859 static void kaweth_set_rx_mode(struct net_device *net)
 860 {
 861         struct kaweth_device *kaweth = netdev_priv(net);
 862
 863         __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
 864                                      KAWETH_PACKET_FILTER_BROADCAST |
 865                                      KAWETH_PACKET_FILTER_MULTICAST;
 866
 867         dbg("Setting Rx mode to %d", packet_filter_bitmap);
 868
 869         netif_stop_queue(net);
 870
 871         if (net->flags & IFF_PROMISC) {
 872                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
 873         }
 874         else if ((net->mc_count) || (net->flags & IFF_ALLMULTI)) {
 875                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
 876         }
 877
 878         kaweth->packet_filter_bitmap = packet_filter_bitmap;
 879         netif_wake_queue(net);
 880 }
 881
 882 /****************************************************************
 883  *     kaweth_async_set_rx_mode
 884  ****************************************************************/
 885 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
 886 {
 887         __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
 888         kaweth->packet_filter_bitmap = 0;
 889         if (packet_filter_bitmap == 0)
 890                 return;
 891
 892         {
 893         int result;
 894         result = kaweth_control(kaweth,
 895                                 usb_sndctrlpipe(kaweth->dev, 0),
 896                                 KAWETH_COMMAND_SET_PACKET_FILTER,
 897                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 898                                 packet_filter_bitmap,
 899                                 0,
 900                                 (void *)&kaweth->scratch,
 901                                 0,
 902                                 KAWETH_CONTROL_TIMEOUT);
 903
 904         if(result < 0) {
 905                 err("Failed to set Rx mode: %d", result);
 906         }
 907         else {
 908                 dbg("Set Rx mode to %d", packet_filter_bitmap);
 909         }
 910         }
 911 }
 912
 913 /****************************************************************
 914  *     kaweth_netdev_stats
 915  ****************************************************************/
 916 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev)
 917 {
 918         struct kaweth_device *kaweth = netdev_priv(dev);
 919         return &kaweth->stats;
 920 }
 921
 922 /****************************************************************
 923  *     kaweth_tx_timeout
 924  ****************************************************************/
 925 static void kaweth_tx_timeout(struct net_device *net)
 926 {
 927         struct kaweth_device *kaweth = netdev_priv(net);
 928
 929         dev_warn(&net->dev, "%s: Tx timed out. Resetting.\n", net->name);
 930         kaweth->stats.tx_errors++;
 931         net->trans_start = jiffies;
 932
 933         usb_unlink_urb(kaweth->tx_urb);
 934 }
 935
 936 /****************************************************************
 937  *     kaweth_suspend
 938  ****************************************************************/
 939 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message)
 940 {
 941         struct kaweth_device *kaweth = usb_get_intfdata(intf);
 942         unsigned long flags;
 943
 944         dbg("Suspending device");
 945         spin_lock_irqsave(&kaweth->device_lock, flags);
 946         kaweth->status |= KAWETH_STATUS_SUSPENDING;
 947         spin_unlock_irqrestore(&kaweth->device_lock, flags);
 948
 949         kaweth_kill_urbs(kaweth);
 950         return 0;
 951 }
 952
 953 /****************************************************************
 954  *     kaweth_resume
 955  ****************************************************************/
 956 static int kaweth_resume(struct usb_interface *intf)
 957 {
 958         struct kaweth_device *kaweth = usb_get_intfdata(intf);
 959         unsigned long flags;
 960
 961         dbg("Resuming device");
 962         spin_lock_irqsave(&kaweth->device_lock, flags);
 963         kaweth->status &= ~KAWETH_STATUS_SUSPENDING;
 964         spin_unlock_irqrestore(&kaweth->device_lock, flags);
 965
 966         if (!kaweth->opened)
 967                 return 0;
 968         kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
 969         kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
 970
 971         return 0;
 972 }
 973
 974 /****************************************************************
 975  *     kaweth_probe
 976  ****************************************************************/
 977
 978
 979 static const struct net_device_ops kaweth_netdev_ops = {
 980         .ndo_open =                     kaweth_open,
 981         .ndo_stop =                     kaweth_close,
 982         .ndo_start_xmit =               kaweth_start_xmit,
 983         .ndo_tx_timeout =               kaweth_tx_timeout,
 984         .ndo_set_multicast_list =       kaweth_set_rx_mode,
 985         .ndo_get_stats =                kaweth_netdev_stats,
 986 };
 987
 988 static int kaweth_probe(
 989                 struct usb_interface *intf,
 990                 const struct usb_device_id *id      /* from id_table */
 991         )
 992 {
 993         struct usb_device *dev = interface_to_usbdev(intf);
 994         struct kaweth_device *kaweth;
 995         struct net_device *netdev;
 996         const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 997         int result = 0;
 998
 999         dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x",
1000                  dev->devnum,
1001                  le16_to_cpu(dev->descriptor.idVendor),
1002                  le16_to_cpu(dev->descriptor.idProduct),
1003                  le16_to_cpu(dev->descriptor.bcdDevice));
1004
1005         dbg("Device at %p", dev);
1006
1007         dbg("Descriptor length: %x type: %x",
1008                  (int)dev->descriptor.bLength,
1009                  (int)dev->descriptor.bDescriptorType);
1010
1011         netdev = alloc_etherdev(sizeof(*kaweth));
1012         if (!netdev)
1013                 return -ENOMEM;
1014
1015         kaweth = netdev_priv(netdev);
1016         kaweth->dev = dev;
1017         kaweth->net = netdev;
1018
1019         spin_lock_init(&kaweth->device_lock);
1020         init_waitqueue_head(&kaweth->term_wait);
1021
1022         dbg("Resetting.");
1023
1024         kaweth_reset(kaweth);
1025
1026         /*
1027          * If high byte of bcdDevice is nonzero, firmware is already
1028          * downloaded. Don't try to do it again, or we'll hang the device.
1029          */
1030
1031         if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) {
1032                 dev_info(&intf->dev, "Firmware present in device.\n");
1033         } else {
1034                 /* Download the firmware */
1035                 dev_info(&intf->dev, "Downloading firmware...\n");
1036                 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
1037                 if ((result = kaweth_download_firmware(kaweth,
1038                                                       "kaweth/new_code.bin",
1039                                                       100,
1040                                                       2)) < 0) {
1041                         err("Error downloading firmware (%d)", result);
1042                         goto err_fw;
1043                 }
1044
1045                 if ((result = kaweth_download_firmware(kaweth,
1046                                                       "kaweth/new_code_fix.bin",
1047                                                       100,
1048                                                       3)) < 0) {
1049                         err("Error downloading firmware fix (%d)", result);
1050                         goto err_fw;
1051                 }
1052
1053                 if ((result = kaweth_download_firmware(kaweth,
1054                                                       "kaweth/trigger_code.bin",
1055                                                       126,
1056                                                       2)) < 0) {
1057                         err("Error downloading trigger code (%d)", result);
1058                         goto err_fw;
1059
1060                 }
1061
1062                 if ((result = kaweth_download_firmware(kaweth,
1063                                                       "kaweth/trigger_code_fix.bin",
1064                                                       126,
1065                                                       3)) < 0) {
1066                         err("Error downloading trigger code fix (%d)", result);
1067                         goto err_fw;
1068                 }
1069
1070
1071                 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
1072                         err("Error triggering firmware (%d)", result);
1073                         goto err_fw;
1074                 }
1075
1076                 /* Device will now disappear for a moment...  */
1077                 dev_info(&intf->dev, "Firmware loaded.  I'll be back...\n");
1078 err_fw:
1079                 free_page((unsigned long)kaweth->firmware_buf);
1080                 free_netdev(netdev);
1081                 return -EIO;
1082         }
1083
1084         result = kaweth_read_configuration(kaweth);
1085
1086         if(result < 0) {
1087                 err("Error reading configuration (%d), no net device created", result);
1088                 goto err_free_netdev;
1089         }
1090
1091         dev_info(&intf->dev, "Statistics collection: %x\n", kaweth->configuration.statistics_mask);
1092         dev_info(&intf->dev, "Multicast filter limit: %x\n", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
1093         dev_info(&intf->dev, "MTU: %d\n", le16_to_cpu(kaweth->configuration.segment_size));
1094         dev_info(&intf->dev, "Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x\n",
1095                  (int)kaweth->configuration.hw_addr[0],
1096                  (int)kaweth->configuration.hw_addr[1],
1097                  (int)kaweth->configuration.hw_addr[2],
1098                  (int)kaweth->configuration.hw_addr[3],
1099                  (int)kaweth->configuration.hw_addr[4],
1100                  (int)kaweth->configuration.hw_addr[5]);
1101
1102         if(!memcmp(&kaweth->configuration.hw_addr,
1103                    &bcast_addr,
1104                    sizeof(bcast_addr))) {
1105                 err("Firmware not functioning properly, no net device created");
1106                 goto err_free_netdev;
1107         }
1108
1109         if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
1110                 dbg("Error setting URB size");
1111                 goto err_free_netdev;
1112         }
1113
1114         if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
1115                 err("Error setting SOFS wait");
1116                 goto err_free_netdev;
1117         }
1118
1119         result = kaweth_set_receive_filter(kaweth,
1120                                            KAWETH_PACKET_FILTER_DIRECTED |
1121                                            KAWETH_PACKET_FILTER_BROADCAST |
1122                                            KAWETH_PACKET_FILTER_MULTICAST);
1123
1124         if(result < 0) {
1125                 err("Error setting receive filter");
1126                 goto err_free_netdev;
1127         }
1128
1129         dbg("Initializing net device.");
1130
1131         kaweth->intf = intf;
1132
1133         kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1134         if (!kaweth->tx_urb)
1135                 goto err_free_netdev;
1136         kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1137         if (!kaweth->rx_urb)
1138                 goto err_only_tx;
1139         kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1140         if (!kaweth->irq_urb)
1141                 goto err_tx_and_rx;
1142
1143         kaweth->intbuffer = usb_buffer_alloc(   kaweth->dev,
1144                                                 INTBUFFERSIZE,
1145                                                 GFP_KERNEL,
1146                                                 &kaweth->intbufferhandle);
1147         if (!kaweth->intbuffer)
1148                 goto err_tx_and_rx_and_irq;
1149         kaweth->rx_buf = usb_buffer_alloc(      kaweth->dev,
1150                                                 KAWETH_BUF_SIZE,
1151                                                 GFP_KERNEL,
1152                                                 &kaweth->rxbufferhandle);
1153         if (!kaweth->rx_buf)
1154                 goto err_all_but_rxbuf;
1155
1156         memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr));
1157         memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr,
1158                sizeof(kaweth->configuration.hw_addr));
1159
1160         netdev->netdev_ops = &kaweth_netdev_ops;
1161         netdev->watchdog_timeo = KAWETH_TX_TIMEOUT;
1162         netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size);
1163         SET_ETHTOOL_OPS(netdev, &ops);
1164
1165         /* kaweth is zeroed as part of alloc_netdev */
1166         INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl);
1167         usb_set_intfdata(intf, kaweth);
1168
1169 #if 0
1170 // dma_supported() is deeply broken on almost all architectures
1171         if (dma_supported (&intf->dev, 0xffffffffffffffffULL))
1172                 kaweth->net->features |= NETIF_F_HIGHDMA;
1173 #endif
1174
1175         SET_NETDEV_DEV(netdev, &intf->dev);
1176         if (register_netdev(netdev) != 0) {
1177                 err("Error registering netdev.");
1178                 goto err_intfdata;
1179         }
1180
1181         dev_info(&intf->dev, "kaweth interface created at %s\n",
1182                  kaweth->net->name);
1183
1184         dbg("Kaweth probe returning.");
1185
1186         return 0;
1187
1188 err_intfdata:
1189         usb_set_intfdata(intf, NULL);
1190         usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1191 err_all_but_rxbuf:
1192         usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1193 err_tx_and_rx_and_irq:
1194         usb_free_urb(kaweth->irq_urb);
1195 err_tx_and_rx:
1196         usb_free_urb(kaweth->rx_urb);
1197 err_only_tx:
1198         usb_free_urb(kaweth->tx_urb);
1199 err_free_netdev:
1200         free_netdev(netdev);
1201
1202         return -EIO;
1203 }
1204
1205 /****************************************************************
1206  *     kaweth_disconnect
1207  ****************************************************************/
1208 static void kaweth_disconnect(struct usb_interface *intf)
1209 {
1210         struct kaweth_device *kaweth = usb_get_intfdata(intf);
1211         struct net_device *netdev;
1212
1213         dev_info(&intf->dev, "Unregistering\n");
1214
1215         usb_set_intfdata(intf, NULL);
1216         if (!kaweth) {
1217                 dev_warn(&intf->dev, "unregistering non-existant device\n");
1218                 return;
1219         }
1220         netdev = kaweth->net;
1221
1222         dbg("Unregistering net device");
1223         unregister_netdev(netdev);
1224
1225         usb_free_urb(kaweth->rx_urb);
1226         usb_free_urb(kaweth->tx_urb);
1227         usb_free_urb(kaweth->irq_urb);
1228
1229         usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1230         usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1231
1232         free_netdev(netdev);
1233 }
1234
1235
1236 // FIXME this completion stuff is a modified clone of
1237 // an OLD version of some stuff in usb.c ...
1238 struct usb_api_data {
1239         wait_queue_head_t wqh;
1240         int done;
1241 };
1242
1243 /*-------------------------------------------------------------------*
1244  * completion handler for compatibility wrappers (sync control/bulk) *
1245  *-------------------------------------------------------------------*/
1246 static void usb_api_blocking_completion(struct urb *urb)
1247 {
1248         struct usb_api_data *awd = (struct usb_api_data *)urb->context;
1249
1250         awd->done=1;
1251         wake_up(&awd->wqh);
1252 }
1253
1254 /*-------------------------------------------------------------------*
1255  *                         COMPATIBILITY STUFF                       *
1256  *-------------------------------------------------------------------*/
1257
1258 // Starts urb and waits for completion or timeout
1259 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
1260 {
1261         struct usb_api_data awd;
1262         int status;
1263
1264         init_waitqueue_head(&awd.wqh);
1265         awd.done = 0;
1266
1267         urb->context = &awd;
1268         status = usb_submit_urb(urb, GFP_NOIO);
1269         if (status) {
1270                 // something went wrong
1271                 usb_free_urb(urb);
1272                 return status;
1273         }
1274
1275         if (!wait_event_timeout(awd.wqh, awd.done, timeout)) {
1276                 // timeout
1277                 dev_warn(&urb->dev->dev, "usb_control/bulk_msg: timeout\n");
1278                 usb_kill_urb(urb);  // remove urb safely
1279                 status = -ETIMEDOUT;
1280         }
1281         else {
1282                 status = urb->status;
1283         }
1284
1285         if (actual_length) {
1286                 *actual_length = urb->actual_length;
1287         }
1288
1289         usb_free_urb(urb);
1290         return status;
1291 }
1292
1293 /*-------------------------------------------------------------------*/
1294 // returns status (negative) or length (positive)
1295 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
1296                                        unsigned int pipe,
1297                                        struct usb_ctrlrequest *cmd, void *data,
1298                                        int len, int timeout)
1299 {
1300         struct urb *urb;
1301         int retv;
1302         int length = 0; /* shut up GCC */
1303
1304         urb = usb_alloc_urb(0, GFP_NOIO);
1305         if (!urb)
1306                 return -ENOMEM;
1307
1308         usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data,
1309                          len, usb_api_blocking_completion, NULL);
1310
1311         retv = usb_start_wait_urb(urb, timeout, &length);
1312         if (retv < 0) {
1313                 return retv;
1314         }
1315         else {
1316                 return length;
1317         }
1318 }
1319
1320
1321 /****************************************************************
1322  *     kaweth_init
1323  ****************************************************************/
1324 static int __init kaweth_init(void)
1325 {
1326         dbg("Driver loading");
1327         return usb_register(&kaweth_driver);
1328 }
1329
1330 /****************************************************************
1331  *     kaweth_exit
1332  ****************************************************************/
1333 static void __exit kaweth_exit(void)
1334 {
1335         usb_deregister(&kaweth_driver);
1336 }
1337
1338 module_init(kaweth_init);
1339 module_exit(kaweth_exit);
1340
1341
1342
1343
1344
1345
1346
1347
1348