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