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  * Develop test procedures for USB net interfaces
  35  * Run test procedures
  36  * Fix bugs from previous two steps
  37  * Snoop other OSs for any tricks we're not doing
  38  * Reduce arbitrary timeouts
  39  * Smart multicast support
  40  * Temporary MAC change support
  41  * Tunable SOFs parameter - ioctl()?
  42  * Ethernet stats collection
  43  * Code formatting improvements
  44  */
  45
  46 #include <linux/module.h>
  47 #include <linux/slab.h>
  48 #include <linux/string.h>
  49 #include <linux/init.h>
  50 #include <linux/delay.h>
  51 #include <linux/netdevice.h>
  52 #include <linux/etherdevice.h>
  53 #include <linux/usb.h>
  54 #include <linux/types.h>
  55 #include <linux/ethtool.h>
  56 #include <linux/dma-mapping.h>
  57 #include <linux/wait.h>
  58 #include <linux/firmware.h>
  59 #include <asm/uaccess.h>
  60 #include <asm/byteorder.h>
  61
  62 #undef DEBUG
  63
  64 #define KAWETH_MTU                      1514
  65 #define KAWETH_BUF_SIZE                 1664
  66 #define KAWETH_TX_TIMEOUT               (5 * HZ)
  67 #define KAWETH_SCRATCH_SIZE             32
  68 #define KAWETH_FIRMWARE_BUF_SIZE        4096
  69 #define KAWETH_CONTROL_TIMEOUT          (30000)
  70
  71 #define KAWETH_STATUS_BROKEN            0x0000001
  72 #define KAWETH_STATUS_CLOSING           0x0000002
  73 #define KAWETH_STATUS_SUSPENDING        0x0000004
  74
  75 #define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING)
  76
  77 #define KAWETH_PACKET_FILTER_PROMISCUOUS        0x01
  78 #define KAWETH_PACKET_FILTER_ALL_MULTICAST      0x02
  79 #define KAWETH_PACKET_FILTER_DIRECTED           0x04
  80 #define KAWETH_PACKET_FILTER_BROADCAST          0x08
  81 #define KAWETH_PACKET_FILTER_MULTICAST          0x10
  82
  83 /* Table 7 */
  84 #define KAWETH_COMMAND_GET_ETHERNET_DESC        0x00
  85 #define KAWETH_COMMAND_MULTICAST_FILTERS        0x01
  86 #define KAWETH_COMMAND_SET_PACKET_FILTER        0x02
  87 #define KAWETH_COMMAND_STATISTICS               0x03
  88 #define KAWETH_COMMAND_SET_TEMP_MAC             0x06
  89 #define KAWETH_COMMAND_GET_TEMP_MAC             0x07
  90 #define KAWETH_COMMAND_SET_URB_SIZE             0x08
  91 #define KAWETH_COMMAND_SET_SOFS_WAIT            0x09
  92 #define KAWETH_COMMAND_SCAN                     0xFF
  93
  94 #define KAWETH_SOFS_TO_WAIT                     0x05
  95
  96 #define INTBUFFERSIZE                           4
  97
  98 #define STATE_OFFSET                            0
  99 #define STATE_MASK                              0x40
 100 #define STATE_SHIFT                             5
 101
 102 #define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED)
 103
 104
 105 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>");
 106 MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver");
 107 MODULE_LICENSE("GPL");
 108 MODULE_FIRMWARE("kaweth/new_code.bin");
 109 MODULE_FIRMWARE("kaweth/new_code_fix.bin");
 110 MODULE_FIRMWARE("kaweth/trigger_code.bin");
 111 MODULE_FIRMWARE("kaweth/trigger_code_fix.bin");
 112
 113 static const char driver_name[] = "kaweth";
 114
 115 static int kaweth_probe(
 116                 struct usb_interface *intf,
 117                 const struct usb_device_id *id  /* from id_table */
 118         );
 119 static void kaweth_disconnect(struct usb_interface *intf);
 120 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
 121                                        unsigned int pipe,
 122                                        struct usb_ctrlrequest *cmd, void *data,
 123                                        int len, int timeout);
 124 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message);
 125 static int kaweth_resume(struct usb_interface *intf);
 126
 127 /****************************************************************
 128  *     usb_device_id
 129  ****************************************************************/
 130 static struct usb_device_id usb_klsi_table[] = {
 131         { USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */
 132         { USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */
 133         { USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */
 134         { USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */
 135         { USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */
 136         { USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */
 137         { USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */
 138         { USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */
 139         { USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */
 140         { USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */
 141         { USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */
 142         { USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */
 143         { USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */
 144         { USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */
 145         { USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */
 146         { USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */
 147         { USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */
 148         { USB_DEVICE(0x0846, 0x1001) }, /* NetGear EA-101 */
 149         { USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */
 150         { USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */
 151         { USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */
 152         { USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */
 153         { USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */
 154         { USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */
 155         { USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */
 156         { USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */
 157         { USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */
 158         { USB_DEVICE(0x1485, 0x0001) }, /* Silicom U2E */
 159         { USB_DEVICE(0x1485, 0x0002) }, /* Psion Dacom Gold Port Ethernet */
 160         { USB_DEVICE(0x1645, 0x0005) }, /* Entrega E45 */
 161         { USB_DEVICE(0x1645, 0x0008) }, /* Entrega USB Ethernet Adapter */
 162         { USB_DEVICE(0x1645, 0x8005) }, /* PortGear Ethernet Adapter */
 163         { USB_DEVICE(0x1668, 0x0323) }, /* Actiontec USB Ethernet */
 164         { USB_DEVICE(0x2001, 0x4000) }, /* D-link DSB-650C */
 165         {} /* Null terminator */
 166 };
 167
 168 MODULE_DEVICE_TABLE (usb, usb_klsi_table);
 169
 170 /****************************************************************
 171  *     kaweth_driver
 172  ****************************************************************/
 173 static struct usb_driver kaweth_driver = {
 174         .name =         driver_name,
 175         .probe =        kaweth_probe,
 176         .disconnect =   kaweth_disconnect,
 177         .suspend =      kaweth_suspend,
 178         .resume =       kaweth_resume,
 179         .id_table =     usb_klsi_table,
 180         .supports_autosuspend = 1,
 181 };
 182
 183 typedef __u8 eth_addr_t[6];
 184
 185 /****************************************************************
 186  *     usb_eth_dev
 187  ****************************************************************/
 188 struct usb_eth_dev {
 189         char *name;
 190         __u16 vendor;
 191         __u16 device;
 192         void *pdata;
 193 };
 194
 195 /****************************************************************
 196  *     kaweth_ethernet_configuration
 197  *     Refer Table 8
 198  ****************************************************************/
 199 struct kaweth_ethernet_configuration
 200 {
 201         __u8 size;
 202         __u8 reserved1;
 203         __u8 reserved2;
 204         eth_addr_t hw_addr;
 205         __u32 statistics_mask;
 206         __le16 segment_size;
 207         __u16 max_multicast_filters;
 208         __u8 reserved3;
 209 } __attribute__ ((packed));
 210
 211 /****************************************************************
 212  *     kaweth_device
 213  ****************************************************************/
 214 struct kaweth_device
 215 {
 216         spinlock_t device_lock;
 217
 218         __u32 status;
 219         int end;
 220         int suspend_lowmem_rx;
 221         int suspend_lowmem_ctrl;
 222         int linkstate;
 223         int opened;
 224         struct delayed_work lowmem_work;
 225
 226         struct usb_device *dev;
 227         struct usb_interface *intf;
 228         struct net_device *net;
 229         wait_queue_head_t term_wait;
 230
 231         struct urb *rx_urb;
 232         struct urb *tx_urb;
 233         struct urb *irq_urb;
 234
 235         dma_addr_t intbufferhandle;
 236         __u8 *intbuffer;
 237         dma_addr_t rxbufferhandle;
 238         __u8 *rx_buf;
 239
 240
 241         struct sk_buff *tx_skb;
 242
 243         __u8 *firmware_buf;
 244         __u8 scratch[KAWETH_SCRATCH_SIZE];
 245         __u16 packet_filter_bitmap;
 246
 247         struct kaweth_ethernet_configuration configuration;
 248
 249         struct net_device_stats stats;
 250 };
 251
 252 /****************************************************************
 253  *     kaweth_control
 254  ****************************************************************/
 255 static int kaweth_control(struct kaweth_device *kaweth,
 256                           unsigned int pipe,
 257                           __u8 request,
 258                           __u8 requesttype,
 259                           __u16 value,
 260                           __u16 index,
 261                           void *data,
 262                           __u16 size,
 263                           int timeout)
 264 {
 265         struct usb_ctrlrequest *dr;
 266         int retval;
 267
 268         dbg("kaweth_control()");
 269
 270         if(in_interrupt()) {
 271                 dbg("in_interrupt()");
 272                 return -EBUSY;
 273         }
 274
 275         dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
 276
 277         if (!dr) {
 278                 dbg("kmalloc() failed");
 279                 return -ENOMEM;
 280         }
 281
 282         dr->bRequestType = requesttype;
 283         dr->bRequest = request;
 284         dr->wValue = cpu_to_le16(value);
 285         dr->wIndex = cpu_to_le16(index);
 286         dr->wLength = cpu_to_le16(size);
 287
 288         retval = kaweth_internal_control_msg(kaweth->dev,
 289                                              pipe,
 290                                              dr,
 291                                              data,
 292                                              size,
 293                                              timeout);
 294
 295         kfree(dr);
 296         return retval;
 297 }
 298
 299 /****************************************************************
 300  *     kaweth_read_configuration
 301  ****************************************************************/
 302 static int kaweth_read_configuration(struct kaweth_device *kaweth)
 303 {
 304         int retval;
 305
 306         dbg("Reading kaweth configuration");
 307
 308         retval = kaweth_control(kaweth,
 309                                 usb_rcvctrlpipe(kaweth->dev, 0),
 310                                 KAWETH_COMMAND_GET_ETHERNET_DESC,
 311                                 USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE,
 312                                 0,
 313                                 0,
 314                                 (void *)&kaweth->configuration,
 315                                 sizeof(kaweth->configuration),
 316                                 KAWETH_CONTROL_TIMEOUT);
 317
 318         return retval;
 319 }
 320
 321 /****************************************************************
 322  *     kaweth_set_urb_size
 323  ****************************************************************/
 324 static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size)
 325 {
 326         int retval;
 327
 328         dbg("Setting URB size to %d", (unsigned)urb_size);
 329
 330         retval = kaweth_control(kaweth,
 331                                 usb_sndctrlpipe(kaweth->dev, 0),
 332                                 KAWETH_COMMAND_SET_URB_SIZE,
 333                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 334                                 urb_size,
 335                                 0,
 336                                 (void *)&kaweth->scratch,
 337                                 0,
 338                                 KAWETH_CONTROL_TIMEOUT);
 339
 340         return retval;
 341 }
 342
 343 /****************************************************************
 344  *     kaweth_set_sofs_wait
 345  ****************************************************************/
 346 static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait)
 347 {
 348         int retval;
 349
 350         dbg("Set SOFS wait to %d", (unsigned)sofs_wait);
 351
 352         retval = kaweth_control(kaweth,
 353                                 usb_sndctrlpipe(kaweth->dev, 0),
 354                                 KAWETH_COMMAND_SET_SOFS_WAIT,
 355                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 356                                 sofs_wait,
 357                                 0,
 358                                 (void *)&kaweth->scratch,
 359                                 0,
 360                                 KAWETH_CONTROL_TIMEOUT);
 361
 362         return retval;
 363 }
 364
 365 /****************************************************************
 366  *     kaweth_set_receive_filter
 367  ****************************************************************/
 368 static int kaweth_set_receive_filter(struct kaweth_device *kaweth,
 369                                      __u16 receive_filter)
 370 {
 371         int retval;
 372
 373         dbg("Set receive filter to %d", (unsigned)receive_filter);
 374
 375         retval = kaweth_control(kaweth,
 376                                 usb_sndctrlpipe(kaweth->dev, 0),
 377                                 KAWETH_COMMAND_SET_PACKET_FILTER,
 378                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 379                                 receive_filter,
 380                                 0,
 381                                 (void *)&kaweth->scratch,
 382                                 0,
 383                                 KAWETH_CONTROL_TIMEOUT);
 384
 385         return retval;
 386 }
 387
 388 /****************************************************************
 389  *     kaweth_download_firmware
 390  ****************************************************************/
 391 static int kaweth_download_firmware(struct kaweth_device *kaweth,
 392                                     const char *fwname,
 393                                     __u8 interrupt,
 394                                     __u8 type)
 395 {
 396         const struct firmware *fw;
 397         int data_len;
 398         int ret;
 399
 400         ret = request_firmware(&fw, fwname, &kaweth->dev->dev);
 401         if (ret) {
 402                 err("Firmware request failed\n");
 403                 return ret;
 404         }
 405
 406         if (fw->size > KAWETH_FIRMWARE_BUF_SIZE) {
 407                 err("Firmware too big: %zu", fw->size);
 408                 return -ENOSPC;
 409         }
 410         data_len = fw->size;
 411         memcpy(kaweth->firmware_buf, fw->data, fw->size);
 412
 413         release_firmware(fw);
 414
 415         kaweth->firmware_buf[2] = (data_len & 0xFF) - 7;
 416         kaweth->firmware_buf[3] = data_len >> 8;
 417         kaweth->firmware_buf[4] = type;
 418         kaweth->firmware_buf[5] = interrupt;
 419
 420         dbg("High: %i, Low:%i", kaweth->firmware_buf[3],
 421                    kaweth->firmware_buf[2]);
 422
 423         dbg("Downloading firmware at %p to kaweth device at %p",
 424             fw->data, kaweth);
 425         dbg("Firmware length: %d", data_len);
 426
 427         return kaweth_control(kaweth,
 428                               usb_sndctrlpipe(kaweth->dev, 0),
 429                               KAWETH_COMMAND_SCAN,
 430                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 431                               0,
 432                               0,
 433                               (void *)kaweth->firmware_buf,
 434                               data_len,
 435                               KAWETH_CONTROL_TIMEOUT);
 436 }
 437
 438 /****************************************************************
 439  *     kaweth_trigger_firmware
 440  ****************************************************************/
 441 static int kaweth_trigger_firmware(struct kaweth_device *kaweth,
 442                                    __u8 interrupt)
 443 {
 444         kaweth->firmware_buf[0] = 0xB6;
 445         kaweth->firmware_buf[1] = 0xC3;
 446         kaweth->firmware_buf[2] = 0x01;
 447         kaweth->firmware_buf[3] = 0x00;
 448         kaweth->firmware_buf[4] = 0x06;
 449         kaweth->firmware_buf[5] = interrupt;
 450         kaweth->firmware_buf[6] = 0x00;
 451         kaweth->firmware_buf[7] = 0x00;
 452
 453         dbg("Triggering firmware");
 454
 455         return kaweth_control(kaweth,
 456                               usb_sndctrlpipe(kaweth->dev, 0),
 457                               KAWETH_COMMAND_SCAN,
 458                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 459                               0,
 460                               0,
 461                               (void *)kaweth->firmware_buf,
 462                               8,
 463                               KAWETH_CONTROL_TIMEOUT);
 464 }
 465
 466 /****************************************************************
 467  *     kaweth_reset
 468  ****************************************************************/
 469 static int kaweth_reset(struct kaweth_device *kaweth)
 470 {
 471         int result;
 472
 473         dbg("kaweth_reset(%p)", kaweth);
 474         result = kaweth_control(kaweth,
 475                                 usb_sndctrlpipe(kaweth->dev, 0),
 476                                 USB_REQ_SET_CONFIGURATION,
 477                                 0,
 478                                 kaweth->dev->config[0].desc.bConfigurationValue,
 479                                 0,
 480                                 NULL,
 481                                 0,
 482                                 KAWETH_CONTROL_TIMEOUT);
 483
 484         mdelay(10);
 485
 486         dbg("kaweth_reset() returns %d.",result);
 487
 488         return result;
 489 }
 490
 491 static void kaweth_usb_receive(struct urb *);
 492 static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t);
 493
 494 /****************************************************************
 495         int_callback
 496 *****************************************************************/
 497
 498 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf)
 499 {
 500         int status;
 501
 502         status = usb_submit_urb (kaweth->irq_urb, mf);
 503         if (unlikely(status == -ENOMEM)) {
 504                 kaweth->suspend_lowmem_ctrl = 1;
 505                 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
 506         } else {
 507                 kaweth->suspend_lowmem_ctrl = 0;
 508         }
 509
 510         if (status)
 511                 err ("can't resubmit intr, %s-%s, status %d",
 512                                 kaweth->dev->bus->bus_name,
 513                                 kaweth->dev->devpath, status);
 514 }
 515
 516 static void int_callback(struct urb *u)
 517 {
 518         struct kaweth_device *kaweth = u->context;
 519         int act_state;
 520         int status = u->status;
 521
 522         switch (status) {
 523         case 0:                 /* success */
 524                 break;
 525         case -ECONNRESET:       /* unlink */
 526         case -ENOENT:
 527         case -ESHUTDOWN:
 528                 return;
 529         /* -EPIPE:  should clear the halt */
 530         default:                /* error */
 531                 goto resubmit;
 532         }
 533
 534         /* we check the link state to report changes */
 535         if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) {
 536                 if (act_state)
 537                         netif_carrier_on(kaweth->net);
 538                 else
 539                         netif_carrier_off(kaweth->net);
 540
 541                 kaweth->linkstate = act_state;
 542         }
 543 resubmit:
 544         kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC);
 545 }
 546
 547 static void kaweth_resubmit_tl(struct work_struct *work)
 548 {
 549         struct kaweth_device *kaweth =
 550                 container_of(work, struct kaweth_device, lowmem_work.work);
 551
 552         if (IS_BLOCKED(kaweth->status))
 553                 return;
 554
 555         if (kaweth->suspend_lowmem_rx)
 556                 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
 557
 558         if (kaweth->suspend_lowmem_ctrl)
 559                 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
 560 }
 561
 562
 563 /****************************************************************
 564  *     kaweth_resubmit_rx_urb
 565  ****************************************************************/
 566 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth,
 567                                                 gfp_t mem_flags)
 568 {
 569         int result;
 570
 571         usb_fill_bulk_urb(kaweth->rx_urb,
 572                       kaweth->dev,
 573                       usb_rcvbulkpipe(kaweth->dev, 1),
 574                       kaweth->rx_buf,
 575                       KAWETH_BUF_SIZE,
 576                       kaweth_usb_receive,
 577                       kaweth);
 578         kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 579         kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle;
 580
 581         if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) {
 582                 if (result == -ENOMEM) {
 583                         kaweth->suspend_lowmem_rx = 1;
 584                         schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
 585                 }
 586                 err("resubmitting rx_urb %d failed", result);
 587         } else {
 588                 kaweth->suspend_lowmem_rx = 0;
 589         }
 590
 591         return result;
 592 }
 593
 594 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth);
 595
 596 /****************************************************************
 597  *     kaweth_usb_receive
 598  ****************************************************************/
 599 static void kaweth_usb_receive(struct urb *urb)
 600 {
 601         struct kaweth_device *kaweth = urb->context;
 602         struct net_device *net = kaweth->net;
 603         int status = urb->status;
 604
 605         int count = urb->actual_length;
 606         int count2 = urb->transfer_buffer_length;
 607
 608         __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf);
 609
 610         struct sk_buff *skb;
 611
 612         if (unlikely(status == -EPIPE)) {
 613                 kaweth->stats.rx_errors++;
 614                 kaweth->end = 1;
 615                 wake_up(&kaweth->term_wait);
 616                 dbg("Status was -EPIPE.");
 617                 return;
 618         }
 619         if (unlikely(status == -ECONNRESET || status == -ESHUTDOWN)) {
 620                 /* we are killed - set a flag and wake the disconnect handler */
 621                 kaweth->end = 1;
 622                 wake_up(&kaweth->term_wait);
 623                 dbg("Status was -ECONNRESET or -ESHUTDOWN.");
 624                 return;
 625         }
 626         if (unlikely(status == -EPROTO || status == -ETIME ||
 627                      status == -EILSEQ)) {
 628                 kaweth->stats.rx_errors++;
 629                 dbg("Status was -EPROTO, -ETIME, or -EILSEQ.");
 630                 return;
 631         }
 632         if (unlikely(status == -EOVERFLOW)) {
 633                 kaweth->stats.rx_errors++;
 634                 dbg("Status was -EOVERFLOW.");
 635         }
 636         spin_lock(&kaweth->device_lock);
 637         if (IS_BLOCKED(kaweth->status)) {
 638                 spin_unlock(&kaweth->device_lock);
 639                 return;
 640         }
 641         spin_unlock(&kaweth->device_lock);
 642
 643         if(status && status != -EREMOTEIO && count != 1) {
 644                 err("%s RX status: %d count: %d packet_len: %d",
 645                            net->name,
 646                            status,
 647                            count,
 648                            (int)pkt_len);
 649                 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 650                 return;
 651         }
 652
 653         if(kaweth->net && (count > 2)) {
 654                 if(pkt_len > (count - 2)) {
 655                         err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count);
 656                         err("Packet len & 2047: %x", pkt_len & 2047);
 657                         err("Count 2: %x", count2);
 658                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 659                         return;
 660                 }
 661
 662                 if(!(skb = dev_alloc_skb(pkt_len+2))) {
 663                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 664                         return;
 665                 }
 666
 667                 skb_reserve(skb, 2);    /* Align IP on 16 byte boundaries */
 668
 669                 skb_copy_to_linear_data(skb, kaweth->rx_buf + 2, pkt_len);
 670
 671                 skb_put(skb, pkt_len);
 672
 673                 skb->protocol = eth_type_trans(skb, net);
 674
 675                 netif_rx(skb);
 676
 677                 kaweth->stats.rx_packets++;
 678                 kaweth->stats.rx_bytes += pkt_len;
 679         }
 680
 681         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 682 }
 683
 684 /****************************************************************
 685  *     kaweth_open
 686  ****************************************************************/
 687 static int kaweth_open(struct net_device *net)
 688 {
 689         struct kaweth_device *kaweth = netdev_priv(net);
 690         int res;
 691
 692         dbg("Opening network device.");
 693
 694         res = usb_autopm_get_interface(kaweth->intf);
 695         if (res) {
 696                 err("Interface cannot be resumed.");
 697                 return -EIO;
 698         }
 699         res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL);
 700         if (res)
 701                 goto err_out;
 702
 703         usb_fill_int_urb(
 704                 kaweth->irq_urb,
 705                 kaweth->dev,
 706                 usb_rcvintpipe(kaweth->dev, 3),
 707                 kaweth->intbuffer,
 708                 INTBUFFERSIZE,
 709                 int_callback,
 710                 kaweth,
 711                 250); /* overriding the descriptor */
 712         kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle;
 713         kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 714
 715         res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL);
 716         if (res) {
 717                 usb_kill_urb(kaweth->rx_urb);
 718                 goto err_out;
 719         }
 720         kaweth->opened = 1;
 721
 722         netif_start_queue(net);
 723
 724         kaweth_async_set_rx_mode(kaweth);
 725         return 0;
 726
 727 err_out:
 728         usb_autopm_enable(kaweth->intf);
 729         return -EIO;
 730 }
 731
 732 /****************************************************************
 733  *     kaweth_kill_urbs
 734  ****************************************************************/
 735 static void kaweth_kill_urbs(struct kaweth_device *kaweth)
 736 {
 737         usb_kill_urb(kaweth->irq_urb);
 738         usb_kill_urb(kaweth->rx_urb);
 739         usb_kill_urb(kaweth->tx_urb);
 740
 741         cancel_delayed_work_sync(&kaweth->lowmem_work);
 742
 743         /* a scheduled work may have resubmitted,
 744            we hit them again */
 745         usb_kill_urb(kaweth->irq_urb);
 746         usb_kill_urb(kaweth->rx_urb);
 747 }
 748
 749 /****************************************************************
 750  *     kaweth_close
 751  ****************************************************************/
 752 static int kaweth_close(struct net_device *net)
 753 {
 754         struct kaweth_device *kaweth = netdev_priv(net);
 755
 756         netif_stop_queue(net);
 757         kaweth->opened = 0;
 758
 759         kaweth->status |= KAWETH_STATUS_CLOSING;
 760
 761         kaweth_kill_urbs(kaweth);
 762
 763         kaweth->status &= ~KAWETH_STATUS_CLOSING;
 764
 765         usb_autopm_enable(kaweth->intf);
 766
 767         return 0;
 768 }
 769
 770 static void kaweth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
 771 {
 772         struct kaweth_device *kaweth = netdev_priv(dev);
 773
 774         strlcpy(info->driver, driver_name, sizeof(info->driver));
 775         usb_make_path(kaweth->dev, info->bus_info, sizeof (info->bus_info));
 776 }
 777
 778 static u32 kaweth_get_link(struct net_device *dev)
 779 {
 780         struct kaweth_device *kaweth = netdev_priv(dev);
 781
 782         return kaweth->linkstate;
 783 }
 784
 785 static const struct ethtool_ops ops = {
 786         .get_drvinfo    = kaweth_get_drvinfo,
 787         .get_link       = kaweth_get_link
 788 };
 789
 790 /****************************************************************
 791  *     kaweth_usb_transmit_complete
 792  ****************************************************************/
 793 static void kaweth_usb_transmit_complete(struct urb *urb)
 794 {
 795         struct kaweth_device *kaweth = urb->context;
 796         struct sk_buff *skb = kaweth->tx_skb;
 797         int status = urb->status;
 798
 799         if (unlikely(status != 0))
 800                 if (status != -ENOENT)
 801                         dbg("%s: TX status %d.", kaweth->net->name, status);
 802
 803         netif_wake_queue(kaweth->net);
 804         dev_kfree_skb_irq(skb);
 805 }
 806
 807 /****************************************************************
 808  *     kaweth_start_xmit
 809  ****************************************************************/
 810 static netdev_tx_t kaweth_start_xmit(struct sk_buff *skb,
 811                                            struct net_device *net)
 812 {
 813         struct kaweth_device *kaweth = netdev_priv(net);
 814         __le16 *private_header;
 815
 816         int res;
 817
 818         spin_lock_irq(&kaweth->device_lock);
 819
 820         kaweth_async_set_rx_mode(kaweth);
 821         netif_stop_queue(net);
 822         if (IS_BLOCKED(kaweth->status)) {
 823                 goto skip;
 824         }
 825
 826         /* We now decide whether we can put our special header into the sk_buff */
 827         if (skb_cloned(skb) || skb_headroom(skb) < 2) {
 828                 /* no such luck - we make our own */
 829                 struct sk_buff *copied_skb;
 830                 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC);
 831                 dev_kfree_skb_irq(skb);
 832                 skb = copied_skb;
 833                 if (!copied_skb) {
 834                         kaweth->stats.tx_errors++;
 835                         netif_start_queue(net);
 836                         spin_unlock_irq(&kaweth->device_lock);
 837                         return NETDEV_TX_OK;
 838                 }
 839         }
 840
 841         private_header = (__le16 *)__skb_push(skb, 2);
 842         *private_header = cpu_to_le16(skb->len-2);
 843         kaweth->tx_skb = skb;
 844
 845         usb_fill_bulk_urb(kaweth->tx_urb,
 846                       kaweth->dev,
 847                       usb_sndbulkpipe(kaweth->dev, 2),
 848                       private_header,
 849                       skb->len,
 850                       kaweth_usb_transmit_complete,
 851                       kaweth);
 852         kaweth->end = 0;
 853
 854         if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
 855         {
 856                 dev_warn(&net->dev, "kaweth failed tx_urb %d\n", res);
 857 skip:
 858                 kaweth->stats.tx_errors++;
 859
 860                 netif_start_queue(net);
 861                 dev_kfree_skb_irq(skb);
 862         }
 863         else
 864         {
 865                 kaweth->stats.tx_packets++;
 866                 kaweth->stats.tx_bytes += skb->len;
 867                 net->trans_start = jiffies;
 868         }
 869
 870         spin_unlock_irq(&kaweth->device_lock);
 871
 872         return NETDEV_TX_OK;
 873 }
 874
 875 /****************************************************************
 876  *     kaweth_set_rx_mode
 877  ****************************************************************/
 878 static void kaweth_set_rx_mode(struct net_device *net)
 879 {
 880         struct kaweth_device *kaweth = netdev_priv(net);
 881
 882         __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
 883                                      KAWETH_PACKET_FILTER_BROADCAST |
 884                                      KAWETH_PACKET_FILTER_MULTICAST;
 885
 886         dbg("Setting Rx mode to %d", packet_filter_bitmap);
 887
 888         netif_stop_queue(net);
 889
 890         if (net->flags & IFF_PROMISC) {
 891                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
 892         }
 893         else if ((net->mc_count) || (net->flags & IFF_ALLMULTI)) {
 894                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
 895         }
 896
 897         kaweth->packet_filter_bitmap = packet_filter_bitmap;
 898         netif_wake_queue(net);
 899 }
 900
 901 /****************************************************************
 902  *     kaweth_async_set_rx_mode
 903  ****************************************************************/
 904 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
 905 {
 906         int result;
 907         __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
 908
 909         kaweth->packet_filter_bitmap = 0;
 910         if (packet_filter_bitmap == 0)
 911                 return;
 912
 913         if (in_interrupt())
 914                 return;
 915
 916         result = kaweth_control(kaweth,
 917                                 usb_sndctrlpipe(kaweth->dev, 0),
 918                                 KAWETH_COMMAND_SET_PACKET_FILTER,
 919                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 920                                 packet_filter_bitmap,
 921                                 0,
 922                                 (void *)&kaweth->scratch,
 923                                 0,
 924                                 KAWETH_CONTROL_TIMEOUT);
 925
 926         if(result < 0) {
 927                 err("Failed to set Rx mode: %d", result);
 928         }
 929         else {
 930                 dbg("Set Rx mode to %d", packet_filter_bitmap);
 931         }
 932 }
 933
 934 /****************************************************************
 935  *     kaweth_netdev_stats
 936  ****************************************************************/
 937 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev)
 938 {
 939         struct kaweth_device *kaweth = netdev_priv(dev);
 940         return &kaweth->stats;
 941 }
 942
 943 /****************************************************************
 944  *     kaweth_tx_timeout
 945  ****************************************************************/
 946 static void kaweth_tx_timeout(struct net_device *net)
 947 {
 948         struct kaweth_device *kaweth = netdev_priv(net);
 949
 950         dev_warn(&net->dev, "%s: Tx timed out. Resetting.\n", net->name);
 951         kaweth->stats.tx_errors++;
 952         net->trans_start = jiffies;
 953
 954         usb_unlink_urb(kaweth->tx_urb);
 955 }
 956
 957 /****************************************************************
 958  *     kaweth_suspend
 959  ****************************************************************/
 960 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message)
 961 {
 962         struct kaweth_device *kaweth = usb_get_intfdata(intf);
 963         unsigned long flags;
 964
 965         dbg("Suspending device");
 966         spin_lock_irqsave(&kaweth->device_lock, flags);
 967         kaweth->status |= KAWETH_STATUS_SUSPENDING;
 968         spin_unlock_irqrestore(&kaweth->device_lock, flags);
 969
 970         kaweth_kill_urbs(kaweth);
 971         return 0;
 972 }
 973
 974 /****************************************************************
 975  *     kaweth_resume
 976  ****************************************************************/
 977 static int kaweth_resume(struct usb_interface *intf)
 978 {
 979         struct kaweth_device *kaweth = usb_get_intfdata(intf);
 980         unsigned long flags;
 981
 982         dbg("Resuming device");
 983         spin_lock_irqsave(&kaweth->device_lock, flags);
 984         kaweth->status &= ~KAWETH_STATUS_SUSPENDING;
 985         spin_unlock_irqrestore(&kaweth->device_lock, flags);
 986
 987         if (!kaweth->opened)
 988                 return 0;
 989         kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
 990         kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
 991
 992         return 0;
 993 }
 994
 995 /****************************************************************
 996  *     kaweth_probe
 997  ****************************************************************/
 998
 999
1000 static const struct net_device_ops kaweth_netdev_ops = {
1001         .ndo_open =                     kaweth_open,
1002         .ndo_stop =                     kaweth_close,
1003         .ndo_start_xmit =               kaweth_start_xmit,
1004         .ndo_tx_timeout =               kaweth_tx_timeout,
1005         .ndo_set_multicast_list =       kaweth_set_rx_mode,
1006         .ndo_get_stats =                kaweth_netdev_stats,
1007         .ndo_change_mtu =               eth_change_mtu,
1008         .ndo_set_mac_address =          eth_mac_addr,
1009         .ndo_validate_addr =            eth_validate_addr,
1010 };
1011
1012 static int kaweth_probe(
1013                 struct usb_interface *intf,
1014                 const struct usb_device_id *id      /* from id_table */
1015         )
1016 {
1017         struct usb_device *dev = interface_to_usbdev(intf);
1018         struct kaweth_device *kaweth;
1019         struct net_device *netdev;
1020         const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
1021         int result = 0;
1022
1023         dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x",
1024                  dev->devnum,
1025                  le16_to_cpu(dev->descriptor.idVendor),
1026                  le16_to_cpu(dev->descriptor.idProduct),
1027                  le16_to_cpu(dev->descriptor.bcdDevice));
1028
1029         dbg("Device at %p", dev);
1030
1031         dbg("Descriptor length: %x type: %x",
1032                  (int)dev->descriptor.bLength,
1033                  (int)dev->descriptor.bDescriptorType);
1034
1035         netdev = alloc_etherdev(sizeof(*kaweth));
1036         if (!netdev)
1037                 return -ENOMEM;
1038
1039         kaweth = netdev_priv(netdev);
1040         kaweth->dev = dev;
1041         kaweth->net = netdev;
1042
1043         spin_lock_init(&kaweth->device_lock);
1044         init_waitqueue_head(&kaweth->term_wait);
1045
1046         dbg("Resetting.");
1047
1048         kaweth_reset(kaweth);
1049
1050         /*
1051          * If high byte of bcdDevice is nonzero, firmware is already
1052          * downloaded. Don't try to do it again, or we'll hang the device.
1053          */
1054
1055         if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) {
1056                 dev_info(&intf->dev, "Firmware present in device.\n");
1057         } else {
1058                 /* Download the firmware */
1059                 dev_info(&intf->dev, "Downloading firmware...\n");
1060                 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
1061                 if ((result = kaweth_download_firmware(kaweth,
1062                                                       "kaweth/new_code.bin",
1063                                                       100,
1064                                                       2)) < 0) {
1065                         err("Error downloading firmware (%d)", result);
1066                         goto err_fw;
1067                 }
1068
1069                 if ((result = kaweth_download_firmware(kaweth,
1070                                                       "kaweth/new_code_fix.bin",
1071                                                       100,
1072                                                       3)) < 0) {
1073                         err("Error downloading firmware fix (%d)", result);
1074                         goto err_fw;
1075                 }
1076
1077                 if ((result = kaweth_download_firmware(kaweth,
1078                                                       "kaweth/trigger_code.bin",
1079                                                       126,
1080                                                       2)) < 0) {
1081                         err("Error downloading trigger code (%d)", result);
1082                         goto err_fw;
1083
1084                 }
1085
1086                 if ((result = kaweth_download_firmware(kaweth,
1087                                                       "kaweth/trigger_code_fix.bin",
1088                                                       126,
1089                                                       3)) < 0) {
1090                         err("Error downloading trigger code fix (%d)", result);
1091                         goto err_fw;
1092                 }
1093
1094
1095                 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
1096                         err("Error triggering firmware (%d)", result);
1097                         goto err_fw;
1098                 }
1099
1100                 /* Device will now disappear for a moment...  */
1101                 dev_info(&intf->dev, "Firmware loaded.  I'll be back...\n");
1102 err_fw:
1103                 free_page((unsigned long)kaweth->firmware_buf);
1104                 free_netdev(netdev);
1105                 return -EIO;
1106         }
1107
1108         result = kaweth_read_configuration(kaweth);
1109
1110         if(result < 0) {
1111                 err("Error reading configuration (%d), no net device created", result);
1112                 goto err_free_netdev;
1113         }
1114
1115         dev_info(&intf->dev, "Statistics collection: %x\n", kaweth->configuration.statistics_mask);
1116         dev_info(&intf->dev, "Multicast filter limit: %x\n", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
1117         dev_info(&intf->dev, "MTU: %d\n", le16_to_cpu(kaweth->configuration.segment_size));
1118         dev_info(&intf->dev, "Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x\n",
1119                  (int)kaweth->configuration.hw_addr[0],
1120                  (int)kaweth->configuration.hw_addr[1],
1121                  (int)kaweth->configuration.hw_addr[2],
1122                  (int)kaweth->configuration.hw_addr[3],
1123                  (int)kaweth->configuration.hw_addr[4],
1124                  (int)kaweth->configuration.hw_addr[5]);
1125
1126         if(!memcmp(&kaweth->configuration.hw_addr,
1127                    &bcast_addr,
1128                    sizeof(bcast_addr))) {
1129                 err("Firmware not functioning properly, no net device created");
1130                 goto err_free_netdev;
1131         }
1132
1133         if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
1134                 dbg("Error setting URB size");
1135                 goto err_free_netdev;
1136         }
1137
1138         if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
1139                 err("Error setting SOFS wait");
1140                 goto err_free_netdev;
1141         }
1142
1143         result = kaweth_set_receive_filter(kaweth,
1144                                            KAWETH_PACKET_FILTER_DIRECTED |
1145                                            KAWETH_PACKET_FILTER_BROADCAST |
1146                                            KAWETH_PACKET_FILTER_MULTICAST);
1147
1148         if(result < 0) {
1149                 err("Error setting receive filter");
1150                 goto err_free_netdev;
1151         }
1152
1153         dbg("Initializing net device.");
1154
1155         kaweth->intf = intf;
1156
1157         kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1158         if (!kaweth->tx_urb)
1159                 goto err_free_netdev;
1160         kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1161         if (!kaweth->rx_urb)
1162                 goto err_only_tx;
1163         kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1164         if (!kaweth->irq_urb)
1165                 goto err_tx_and_rx;
1166
1167         kaweth->intbuffer = usb_buffer_alloc(   kaweth->dev,
1168                                                 INTBUFFERSIZE,
1169                                                 GFP_KERNEL,
1170                                                 &kaweth->intbufferhandle);
1171         if (!kaweth->intbuffer)
1172                 goto err_tx_and_rx_and_irq;
1173         kaweth->rx_buf = usb_buffer_alloc(      kaweth->dev,
1174                                                 KAWETH_BUF_SIZE,
1175                                                 GFP_KERNEL,
1176                                                 &kaweth->rxbufferhandle);
1177         if (!kaweth->rx_buf)
1178                 goto err_all_but_rxbuf;
1179
1180         memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr));
1181         memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr,
1182                sizeof(kaweth->configuration.hw_addr));
1183
1184         netdev->netdev_ops = &kaweth_netdev_ops;
1185         netdev->watchdog_timeo = KAWETH_TX_TIMEOUT;
1186         netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size);
1187         SET_ETHTOOL_OPS(netdev, &ops);
1188
1189         /* kaweth is zeroed as part of alloc_netdev */
1190         INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl);
1191         usb_set_intfdata(intf, kaweth);
1192
1193 #if 0
1194 // dma_supported() is deeply broken on almost all architectures
1195         if (dma_supported (&intf->dev, 0xffffffffffffffffULL))
1196                 kaweth->net->features |= NETIF_F_HIGHDMA;
1197 #endif
1198
1199         SET_NETDEV_DEV(netdev, &intf->dev);
1200         if (register_netdev(netdev) != 0) {
1201                 err("Error registering netdev.");
1202                 goto err_intfdata;
1203         }
1204
1205         dev_info(&intf->dev, "kaweth interface created at %s\n",
1206                  kaweth->net->name);
1207
1208         dbg("Kaweth probe returning.");
1209
1210         return 0;
1211
1212 err_intfdata:
1213         usb_set_intfdata(intf, NULL);
1214         usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1215 err_all_but_rxbuf:
1216         usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1217 err_tx_and_rx_and_irq:
1218         usb_free_urb(kaweth->irq_urb);
1219 err_tx_and_rx:
1220         usb_free_urb(kaweth->rx_urb);
1221 err_only_tx:
1222         usb_free_urb(kaweth->tx_urb);
1223 err_free_netdev:
1224         free_netdev(netdev);
1225
1226         return -EIO;
1227 }
1228
1229 /****************************************************************
1230  *     kaweth_disconnect
1231  ****************************************************************/
1232 static void kaweth_disconnect(struct usb_interface *intf)
1233 {
1234         struct kaweth_device *kaweth = usb_get_intfdata(intf);
1235         struct net_device *netdev;
1236
1237         dev_info(&intf->dev, "Unregistering\n");
1238
1239         usb_set_intfdata(intf, NULL);
1240         if (!kaweth) {
1241                 dev_warn(&intf->dev, "unregistering non-existant device\n");
1242                 return;
1243         }
1244         netdev = kaweth->net;
1245
1246         dbg("Unregistering net device");
1247         unregister_netdev(netdev);
1248
1249         usb_free_urb(kaweth->rx_urb);
1250         usb_free_urb(kaweth->tx_urb);
1251         usb_free_urb(kaweth->irq_urb);
1252
1253         usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1254         usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1255
1256         free_netdev(netdev);
1257 }
1258
1259
1260 // FIXME this completion stuff is a modified clone of
1261 // an OLD version of some stuff in usb.c ...
1262 struct usb_api_data {
1263         wait_queue_head_t wqh;
1264         int done;
1265 };
1266
1267 /*-------------------------------------------------------------------*
1268  * completion handler for compatibility wrappers (sync control/bulk) *
1269  *-------------------------------------------------------------------*/
1270 static void usb_api_blocking_completion(struct urb *urb)
1271 {
1272         struct usb_api_data *awd = (struct usb_api_data *)urb->context;
1273
1274         awd->done=1;
1275         wake_up(&awd->wqh);
1276 }
1277
1278 /*-------------------------------------------------------------------*
1279  *                         COMPATIBILITY STUFF                       *
1280  *-------------------------------------------------------------------*/
1281
1282 // Starts urb and waits for completion or timeout
1283 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
1284 {
1285         struct usb_api_data awd;
1286         int status;
1287
1288         init_waitqueue_head(&awd.wqh);
1289         awd.done = 0;
1290
1291         urb->context = &awd;
1292         status = usb_submit_urb(urb, GFP_NOIO);
1293         if (status) {
1294                 // something went wrong
1295                 usb_free_urb(urb);
1296                 return status;
1297         }
1298
1299         if (!wait_event_timeout(awd.wqh, awd.done, timeout)) {
1300                 // timeout
1301                 dev_warn(&urb->dev->dev, "usb_control/bulk_msg: timeout\n");
1302                 usb_kill_urb(urb);  // remove urb safely
1303                 status = -ETIMEDOUT;
1304         }
1305         else {
1306                 status = urb->status;
1307         }
1308
1309         if (actual_length) {
1310                 *actual_length = urb->actual_length;
1311         }
1312
1313         usb_free_urb(urb);
1314         return status;
1315 }
1316
1317 /*-------------------------------------------------------------------*/
1318 // returns status (negative) or length (positive)
1319 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
1320                                        unsigned int pipe,
1321                                        struct usb_ctrlrequest *cmd, void *data,
1322                                        int len, int timeout)
1323 {
1324         struct urb *urb;
1325         int retv;
1326         int length = 0; /* shut up GCC */
1327
1328         urb = usb_alloc_urb(0, GFP_NOIO);
1329         if (!urb)
1330                 return -ENOMEM;
1331
1332         usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data,
1333                          len, usb_api_blocking_completion, NULL);
1334
1335         retv = usb_start_wait_urb(urb, timeout, &length);
1336         if (retv < 0) {
1337                 return retv;
1338         }
1339         else {
1340                 return length;
1341         }
1342 }
1343
1344
1345 /****************************************************************
1346  *     kaweth_init
1347  ****************************************************************/
1348 static int __init kaweth_init(void)
1349 {
1350         dbg("Driver loading");
1351         return usb_register(&kaweth_driver);
1352 }
1353
1354 /****************************************************************
1355  *     kaweth_exit
1356  ****************************************************************/
1357 static void __exit kaweth_exit(void)
1358 {
1359         usb_deregister(&kaweth_driver);
1360 }
1361
1362 module_init(kaweth_init);
1363 module_exit(kaweth_exit);
1364
1365
1366
1367
1368
1369
1370
1371
1372