drivers/usb/net/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/sched.h>
  50 #include <linux/slab.h>
  51 #include <linux/string.h>
  52 #include <linux/init.h>
  53 #include <linux/delay.h>
  54 #include <linux/netdevice.h>
  55 #include <linux/etherdevice.h>
  56 #include <linux/usb.h>
  57 #include <linux/types.h>
  58 #include <linux/ethtool.h>
  59 #include <linux/pci.h>
  60 #include <linux/dma-mapping.h>
  61 #include <asm/uaccess.h>
  62 #include <asm/semaphore.h>
  63 #include <asm/byteorder.h>
  64
  65 #define DEBUG
  66
  67 #ifdef DEBUG
  68 #define kaweth_dbg(format, arg...) printk(KERN_DEBUG __FILE__ ": " format "\n" ,##arg)
  69 #else
  70 #define kaweth_dbg(format, arg...) do {} while (0)
  71 #endif
  72 #define kaweth_err(format, arg...) printk(KERN_ERR __FILE__ ": " format "\n" ,##arg)
  73 #define kaweth_info(format, arg...) printk(KERN_INFO __FILE__ ": " format "\n" , ##arg)
  74 #define kaweth_warn(format, arg...) printk(KERN_WARNING __FILE__ ": " format "\n" , ##arg)
  75
  76
  77 #include "kawethfw.h"
  78
  79 #define KAWETH_MTU                      1514
  80 #define KAWETH_BUF_SIZE                 1664
  81 #define KAWETH_TX_TIMEOUT               (5 * HZ)
  82 #define KAWETH_SCRATCH_SIZE             32
  83 #define KAWETH_FIRMWARE_BUF_SIZE        4096
  84 #define KAWETH_CONTROL_TIMEOUT          (30 * HZ)
  85
  86 #define KAWETH_STATUS_BROKEN            0x0000001
  87 #define KAWETH_STATUS_CLOSING           0x0000002
  88
  89 #define KAWETH_PACKET_FILTER_PROMISCUOUS        0x01
  90 #define KAWETH_PACKET_FILTER_ALL_MULTICAST      0x02
  91 #define KAWETH_PACKET_FILTER_DIRECTED           0x04
  92 #define KAWETH_PACKET_FILTER_BROADCAST          0x08
  93 #define KAWETH_PACKET_FILTER_MULTICAST          0x10
  94
  95 /* Table 7 */
  96 #define KAWETH_COMMAND_GET_ETHERNET_DESC        0x00
  97 #define KAWETH_COMMAND_MULTICAST_FILTERS        0x01
  98 #define KAWETH_COMMAND_SET_PACKET_FILTER        0x02
  99 #define KAWETH_COMMAND_STATISTICS               0x03
 100 #define KAWETH_COMMAND_SET_TEMP_MAC             0x06
 101 #define KAWETH_COMMAND_GET_TEMP_MAC             0x07
 102 #define KAWETH_COMMAND_SET_URB_SIZE             0x08
 103 #define KAWETH_COMMAND_SET_SOFS_WAIT            0x09
 104 #define KAWETH_COMMAND_SCAN                     0xFF
 105
 106 #define KAWETH_SOFS_TO_WAIT                     0x05
 107
 108 #define INTBUFFERSIZE                           4
 109
 110 #define STATE_OFFSET                            0
 111 #define STATE_MASK                              0x40
 112 #define STATE_SHIFT                             5
 113
 114
 115 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>");
 116 MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver");
 117 MODULE_LICENSE("GPL");
 118
 119 static const char driver_name[] = "kaweth";
 120
 121 static int kaweth_probe(
 122                 struct usb_interface *intf,
 123                 const struct usb_device_id *id  /* from id_table */
 124         );
 125 static void kaweth_disconnect(struct usb_interface *intf);
 126 int kaweth_internal_control_msg(struct usb_device *usb_dev, unsigned int pipe,
 127                                 struct usb_ctrlrequest *cmd, void *data,
 128                                 int len, int timeout);
 129
 130 /****************************************************************
 131  *     usb_device_id
 132  ****************************************************************/
 133 static struct usb_device_id usb_klsi_table[] = {
 134         { USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */
 135         { USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */
 136         { USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */
 137         { USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */
 138         { USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */
 139         { USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */
 140         { USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */
 141         { USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */
 142         { USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */
 143         { USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */
 144         { USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */
 145         { USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */
 146         { USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */
 147         { USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */
 148         { USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */
 149         { USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */
 150         { USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */
 151         { USB_DEVICE(0x0846, 0x1001) }, /* NetGear EA-101 */
 152         { USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */
 153         { USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */
 154         { USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */
 155         { USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */
 156         { USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */
 157         { USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */
 158         { USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */
 159         { USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */
 160         { USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */
 161         { USB_DEVICE(0x1485, 0x0001) }, /* Silicom U2E */
 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(0x2001, 0x4000) }, /* D-link DSB-650C */
 166         {} /* Null terminator */
 167 };
 168
 169 MODULE_DEVICE_TABLE (usb, usb_klsi_table);
 170
 171 /****************************************************************
 172  *     kaweth_driver
 173  ****************************************************************/
 174 static struct usb_driver kaweth_driver = {
 175         .owner =        THIS_MODULE,
 176         .name =         driver_name,
 177         .probe =        kaweth_probe,
 178         .disconnect =   kaweth_disconnect,
 179         .id_table =     usb_klsi_table,
 180 };
 181
 182 typedef __u8 eth_addr_t[6];
 183
 184 /****************************************************************
 185  *     usb_eth_dev
 186  ****************************************************************/
 187 struct usb_eth_dev {
 188         char *name;
 189         __u16 vendor;
 190         __u16 device;
 191         void *pdata;
 192 };
 193
 194 /****************************************************************
 195  *     kaweth_ethernet_configuration
 196  *     Refer Table 8
 197  ****************************************************************/
 198 struct kaweth_ethernet_configuration
 199 {
 200         __u8 size;
 201         __u8 reserved1;
 202         __u8 reserved2;
 203         eth_addr_t hw_addr;
 204         __u32 statistics_mask;
 205         __u16 segment_size;
 206         __u16 max_multicast_filters;
 207         __u8 reserved3;
 208 } __attribute__ ((packed));
 209
 210 /****************************************************************
 211  *     kaweth_device
 212  ****************************************************************/
 213 struct kaweth_device
 214 {
 215         spinlock_t device_lock;
 216
 217         __u32 status;
 218         int end;
 219         int removed;
 220         int suspend_lowmem_rx;
 221         int suspend_lowmem_ctrl;
 222         int linkstate;
 223         struct work_struct lowmem_work;
 224
 225         struct usb_device *dev;
 226         struct net_device *net;
 227         wait_queue_head_t term_wait;
 228
 229         struct urb *rx_urb;
 230         struct urb *tx_urb;
 231         struct urb *irq_urb;
 232
 233         dma_addr_t intbufferhandle;
 234         __u8 *intbuffer;
 235         dma_addr_t rxbufferhandle;
 236         __u8 *rx_buf;
 237
 238
 239         struct sk_buff *tx_skb;
 240
 241         __u8 *firmware_buf;
 242         __u8 scratch[KAWETH_SCRATCH_SIZE];
 243         __u16 packet_filter_bitmap;
 244
 245         struct kaweth_ethernet_configuration configuration;
 246
 247         struct net_device_stats stats;
 248 } __attribute__ ((packed));
 249
 250
 251 /****************************************************************
 252  *     kaweth_control
 253  ****************************************************************/
 254 static int kaweth_control(struct kaweth_device *kaweth,
 255                           unsigned int pipe,
 256                           __u8 request,
 257                           __u8 requesttype,
 258                           __u16 value,
 259                           __u16 index,
 260                           void *data,
 261                           __u16 size,
 262                           int timeout)
 263 {
 264         struct usb_ctrlrequest *dr;
 265
 266         kaweth_dbg("kaweth_control()");
 267
 268         if(in_interrupt()) {
 269                 kaweth_dbg("in_interrupt()");
 270                 return -EBUSY;
 271         }
 272
 273         dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
 274
 275         if (!dr) {
 276                 kaweth_dbg("kmalloc() failed");
 277                 return -ENOMEM;
 278         }
 279
 280         dr->bRequestType= requesttype;
 281         dr->bRequest = request;
 282         dr->wValue = cpu_to_le16p(&value);
 283         dr->wIndex = cpu_to_le16p(&index);
 284         dr->wLength = cpu_to_le16p(&size);
 285
 286         return kaweth_internal_control_msg(kaweth->dev,
 287                                         pipe,
 288                                         dr,
 289                                         data,
 290                                         size,
 291                                         timeout);
 292 }
 293
 294 /****************************************************************
 295  *     kaweth_read_configuration
 296  ****************************************************************/
 297 static int kaweth_read_configuration(struct kaweth_device *kaweth)
 298 {
 299         int retval;
 300
 301         kaweth_dbg("Reading kaweth configuration");
 302
 303         retval = kaweth_control(kaweth,
 304                                 usb_rcvctrlpipe(kaweth->dev, 0),
 305                                 KAWETH_COMMAND_GET_ETHERNET_DESC,
 306                                 USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE,
 307                                 0,
 308                                 0,
 309                                 (void *)&kaweth->configuration,
 310                                 sizeof(kaweth->configuration),
 311                                 KAWETH_CONTROL_TIMEOUT);
 312
 313         return retval;
 314 }
 315
 316 /****************************************************************
 317  *     kaweth_set_urb_size
 318  ****************************************************************/
 319 static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size)
 320 {
 321         int retval;
 322
 323         kaweth_dbg("Setting URB size to %d", (unsigned)urb_size);
 324
 325         retval = kaweth_control(kaweth,
 326                                 usb_sndctrlpipe(kaweth->dev, 0),
 327                                 KAWETH_COMMAND_SET_URB_SIZE,
 328                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 329                                 urb_size,
 330                                 0,
 331                                 (void *)&kaweth->scratch,
 332                                 0,
 333                                 KAWETH_CONTROL_TIMEOUT);
 334
 335         return retval;
 336 }
 337
 338 /****************************************************************
 339  *     kaweth_set_sofs_wait
 340  ****************************************************************/
 341 static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait)
 342 {
 343         int retval;
 344
 345         kaweth_dbg("Set SOFS wait to %d", (unsigned)sofs_wait);
 346
 347         retval = kaweth_control(kaweth,
 348                                 usb_sndctrlpipe(kaweth->dev, 0),
 349                                 KAWETH_COMMAND_SET_SOFS_WAIT,
 350                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 351                                 sofs_wait,
 352                                 0,
 353                                 (void *)&kaweth->scratch,
 354                                 0,
 355                                 KAWETH_CONTROL_TIMEOUT);
 356
 357         return retval;
 358 }
 359
 360 /****************************************************************
 361  *     kaweth_set_receive_filter
 362  ****************************************************************/
 363 static int kaweth_set_receive_filter(struct kaweth_device *kaweth,
 364                                      __u16 receive_filter)
 365 {
 366         int retval;
 367
 368         kaweth_dbg("Set receive filter to %d", (unsigned)receive_filter);
 369
 370         retval = kaweth_control(kaweth,
 371                                 usb_sndctrlpipe(kaweth->dev, 0),
 372                                 KAWETH_COMMAND_SET_PACKET_FILTER,
 373                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 374                                 receive_filter,
 375                                 0,
 376                                 (void *)&kaweth->scratch,
 377                                 0,
 378                                 KAWETH_CONTROL_TIMEOUT);
 379
 380         return retval;
 381 }
 382
 383 /****************************************************************
 384  *     kaweth_download_firmware
 385  ****************************************************************/
 386 static int kaweth_download_firmware(struct kaweth_device *kaweth,
 387                                     __u8 *data,
 388                                     __u16 data_len,
 389                                     __u8 interrupt,
 390                                     __u8 type)
 391 {
 392         if(data_len > KAWETH_FIRMWARE_BUF_SIZE) {
 393                 kaweth_err("Firmware too big: %d", data_len);
 394                 return -ENOSPC;
 395         }
 396
 397         memcpy(kaweth->firmware_buf, data, data_len);
 398
 399         kaweth->firmware_buf[2] = (data_len & 0xFF) - 7;
 400         kaweth->firmware_buf[3] = data_len >> 8;
 401         kaweth->firmware_buf[4] = type;
 402         kaweth->firmware_buf[5] = interrupt;
 403
 404         kaweth_dbg("High: %i, Low:%i", kaweth->firmware_buf[3],
 405                    kaweth->firmware_buf[2]);
 406
 407         kaweth_dbg("Downloading firmware at %p to kaweth device at %p",
 408             data,
 409             kaweth);
 410         kaweth_dbg("Firmware length: %d", data_len);
 411
 412         return kaweth_control(kaweth,
 413                               usb_sndctrlpipe(kaweth->dev, 0),
 414                               KAWETH_COMMAND_SCAN,
 415                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 416                               0,
 417                               0,
 418                               (void *)kaweth->firmware_buf,
 419                               data_len,
 420                               KAWETH_CONTROL_TIMEOUT);
 421 }
 422
 423 /****************************************************************
 424  *     kaweth_trigger_firmware
 425  ****************************************************************/
 426 static int kaweth_trigger_firmware(struct kaweth_device *kaweth,
 427                                    __u8 interrupt)
 428 {
 429         kaweth->firmware_buf[0] = 0xB6;
 430         kaweth->firmware_buf[1] = 0xC3;
 431         kaweth->firmware_buf[2] = 0x01;
 432         kaweth->firmware_buf[3] = 0x00;
 433         kaweth->firmware_buf[4] = 0x06;
 434         kaweth->firmware_buf[5] = interrupt;
 435         kaweth->firmware_buf[6] = 0x00;
 436         kaweth->firmware_buf[7] = 0x00;
 437
 438         kaweth_dbg("Triggering firmware");
 439
 440         return kaweth_control(kaweth,
 441                               usb_sndctrlpipe(kaweth->dev, 0),
 442                               KAWETH_COMMAND_SCAN,
 443                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 444                               0,
 445                               0,
 446                               (void *)kaweth->firmware_buf,
 447                               8,
 448                               KAWETH_CONTROL_TIMEOUT);
 449 }
 450
 451 /****************************************************************
 452  *     kaweth_reset
 453  ****************************************************************/
 454 static int kaweth_reset(struct kaweth_device *kaweth)
 455 {
 456         int result;
 457
 458         kaweth_dbg("kaweth_reset(%p)", kaweth);
 459         result = kaweth_control(kaweth,
 460                                 usb_sndctrlpipe(kaweth->dev, 0),
 461                                 USB_REQ_SET_CONFIGURATION,
 462                                 0,
 463                                 kaweth->dev->config[0].desc.bConfigurationValue,
 464                                 0,
 465                                 NULL,
 466                                 0,
 467                                 KAWETH_CONTROL_TIMEOUT);
 468
 469         udelay(10000);
 470
 471         kaweth_dbg("kaweth_reset() returns %d.",result);
 472
 473         return result;
 474 }
 475
 476 static void kaweth_usb_receive(struct urb *, struct pt_regs *regs);
 477 static int kaweth_resubmit_rx_urb(struct kaweth_device *, int);
 478
 479 /****************************************************************
 480         int_callback
 481 *****************************************************************/
 482
 483 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, int mf)
 484 {
 485         int status;
 486
 487         status = usb_submit_urb (kaweth->irq_urb, mf);
 488         if (unlikely(status == -ENOMEM)) {
 489                 kaweth->suspend_lowmem_ctrl = 1;
 490                 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
 491         } else {
 492                 kaweth->suspend_lowmem_ctrl = 0;
 493         }
 494
 495         if (status)
 496                 err ("can't resubmit intr, %s-%s, status %d",
 497                                 kaweth->dev->bus->bus_name,
 498                                 kaweth->dev->devpath, status);
 499 }
 500
 501 static void int_callback(struct urb *u, struct pt_regs *regs)
 502 {
 503         struct kaweth_device *kaweth = u->context;
 504         int act_state;
 505
 506         switch (u->status) {
 507         case 0:                 /* success */
 508                 break;
 509         case -ECONNRESET:       /* unlink */
 510         case -ENOENT:
 511         case -ESHUTDOWN:
 512                 return;
 513         /* -EPIPE:  should clear the halt */
 514         default:                /* error */
 515                 goto resubmit;
 516         }
 517
 518         /* we check the link state to report changes */
 519         if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) {
 520                 if (!act_state)
 521                         netif_carrier_on(kaweth->net);
 522                 else
 523                         netif_carrier_off(kaweth->net);
 524
 525                 kaweth->linkstate = act_state;
 526         }
 527 resubmit:
 528         kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC);
 529 }
 530
 531 static void kaweth_resubmit_tl(void *d)
 532 {
 533         struct kaweth_device *kaweth = (struct kaweth_device *)d;
 534
 535         if (kaweth->status | KAWETH_STATUS_CLOSING)
 536                 return;
 537
 538         if (kaweth->suspend_lowmem_rx)
 539                 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
 540
 541         if (kaweth->suspend_lowmem_ctrl)
 542                 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
 543 }
 544
 545
 546 /****************************************************************
 547  *     kaweth_resubmit_rx_urb
 548  ****************************************************************/
 549 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth,
 550                                                 int mem_flags)
 551 {
 552         int result;
 553
 554         usb_fill_bulk_urb(kaweth->rx_urb,
 555                       kaweth->dev,
 556                       usb_rcvbulkpipe(kaweth->dev, 1),
 557                       kaweth->rx_buf,
 558                       KAWETH_BUF_SIZE,
 559                       kaweth_usb_receive,
 560                       kaweth);
 561         kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 562         kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle;
 563
 564         if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) {
 565                 if (result == -ENOMEM) {
 566                         kaweth->suspend_lowmem_rx = 1;
 567                         schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
 568                 }
 569                 kaweth_err("resubmitting rx_urb %d failed", result);
 570         } else {
 571                 kaweth->suspend_lowmem_rx = 0;
 572         }
 573
 574         return result;
 575 }
 576
 577 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth);
 578
 579 /****************************************************************
 580  *     kaweth_usb_receive
 581  ****************************************************************/
 582 static void kaweth_usb_receive(struct urb *urb, struct pt_regs *regs)
 583 {
 584         struct kaweth_device *kaweth = urb->context;
 585         struct net_device *net = kaweth->net;
 586
 587         int count = urb->actual_length;
 588         int count2 = urb->transfer_buffer_length;
 589
 590         __u16 pkt_len = le16_to_cpup((u16 *)kaweth->rx_buf);
 591
 592         struct sk_buff *skb;
 593
 594         if(unlikely(urb->status == -ECONNRESET || urb->status == -ECONNABORTED))
 595         /* we are killed - set a flag and wake the disconnect handler */
 596         {
 597                 kaweth->end = 1;
 598                 wake_up(&kaweth->term_wait);
 599                 return;
 600         }
 601
 602         if (kaweth->status & KAWETH_STATUS_CLOSING)
 603                 return;
 604
 605         if(urb->status && urb->status != -EREMOTEIO && count != 1) {
 606                 kaweth_err("%s RX status: %d count: %d packet_len: %d",
 607                            net->name,
 608                            urb->status,
 609                            count,
 610                            (int)pkt_len);
 611                 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 612                 return;
 613         }
 614
 615         if(kaweth->net && (count > 2)) {
 616                 if(pkt_len > (count - 2)) {
 617                         kaweth_err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count);
 618                         kaweth_err("Packet len & 2047: %x", pkt_len & 2047);
 619                         kaweth_err("Count 2: %x", count2);
 620                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 621                         return;
 622                 }
 623
 624                 if(!(skb = dev_alloc_skb(pkt_len+2))) {
 625                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 626                         return;
 627                 }
 628
 629                 skb_reserve(skb, 2);    /* Align IP on 16 byte boundaries */
 630
 631                 skb->dev = net;
 632
 633                 eth_copy_and_sum(skb, kaweth->rx_buf + 2, pkt_len, 0);
 634
 635                 skb_put(skb, pkt_len);
 636
 637                 skb->protocol = eth_type_trans(skb, net);
 638
 639                 netif_rx(skb);
 640
 641                 kaweth->stats.rx_packets++;
 642                 kaweth->stats.rx_bytes += pkt_len;
 643         }
 644
 645         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 646 }
 647
 648 /****************************************************************
 649  *     kaweth_open
 650  ****************************************************************/
 651 static int kaweth_open(struct net_device *net)
 652 {
 653         struct kaweth_device *kaweth = (struct kaweth_device *)net->priv;
 654         int res;
 655
 656         kaweth_dbg("Opening network device.");
 657
 658         res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL);
 659         if (res)
 660                 return -EIO;
 661
 662         usb_fill_int_urb(
 663                 kaweth->irq_urb,
 664                 kaweth->dev,
 665                 usb_rcvintpipe(kaweth->dev, 3),
 666                 kaweth->intbuffer,
 667                 INTBUFFERSIZE,
 668                 int_callback,
 669                 kaweth,
 670                 HZ/4);
 671         kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle;
 672         kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 673
 674         res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL);
 675         if (res) {
 676                 usb_unlink_urb(kaweth->rx_urb);
 677                 return -EIO;
 678         }
 679
 680         netif_start_queue(net);
 681
 682         kaweth_async_set_rx_mode(kaweth);
 683         return 0;
 684 }
 685
 686 /****************************************************************
 687  *     kaweth_close
 688  ****************************************************************/
 689 static int kaweth_close(struct net_device *net)
 690 {
 691         struct kaweth_device *kaweth = net->priv;
 692
 693         netif_stop_queue(net);
 694
 695         kaweth->status |= KAWETH_STATUS_CLOSING;
 696
 697         usb_unlink_urb(kaweth->irq_urb);
 698         usb_unlink_urb(kaweth->rx_urb);
 699
 700         flush_scheduled_work();
 701
 702         /* a scheduled work may have resubmitted,
 703            we hit them again */
 704         usb_unlink_urb(kaweth->irq_urb);
 705         usb_unlink_urb(kaweth->rx_urb);
 706
 707         kaweth->status &= ~KAWETH_STATUS_CLOSING;
 708
 709         return 0;
 710 }
 711
 712 static int netdev_ethtool_ioctl(struct net_device *dev, void __user *useraddr)
 713 {
 714         u32 ethcmd;
 715
 716         if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
 717                 return -EFAULT;
 718
 719         switch (ethcmd) {
 720         case ETHTOOL_GDRVINFO: {
 721                 struct ethtool_drvinfo info = {ETHTOOL_GDRVINFO};
 722                 strlcpy(info.driver, driver_name, sizeof(info.driver));
 723                 if (copy_to_user(useraddr, &info, sizeof(info)))
 724                         return -EFAULT;
 725                 return 0;
 726         }
 727         }
 728
 729         return -EOPNOTSUPP;
 730 }
 731
 732 /****************************************************************
 733  *     kaweth_ioctl
 734  ****************************************************************/
 735 static int kaweth_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
 736 {
 737         switch (cmd) {
 738         case SIOCETHTOOL:
 739                 return netdev_ethtool_ioctl(net, (void __user *)rq->ifr_data);
 740         }
 741         return -EOPNOTSUPP;
 742 }
 743
 744 /****************************************************************
 745  *     kaweth_usb_transmit_complete
 746  ****************************************************************/
 747 static void kaweth_usb_transmit_complete(struct urb *urb, struct pt_regs *regs)
 748 {
 749         struct kaweth_device *kaweth = urb->context;
 750         struct sk_buff *skb = kaweth->tx_skb;
 751
 752         if (unlikely(urb->status != 0))
 753                 kaweth_dbg("%s: TX status %d.", kaweth->net->name, urb->status);
 754
 755         netif_wake_queue(kaweth->net);
 756         dev_kfree_skb_irq(skb);
 757 }
 758
 759 /****************************************************************
 760  *     kaweth_start_xmit
 761  ****************************************************************/
 762 static int kaweth_start_xmit(struct sk_buff *skb, struct net_device *net)
 763 {
 764         struct kaweth_device *kaweth = net->priv;
 765         u16 *private_header;
 766
 767         int res;
 768
 769         spin_lock(&kaweth->device_lock);
 770
 771         if (kaweth->removed) {
 772         /* our device is undergoing disconnection - we bail out */
 773                 spin_unlock(&kaweth->device_lock);
 774                 dev_kfree_skb_irq(skb);
 775                 return 0;
 776         }
 777
 778         kaweth_async_set_rx_mode(kaweth);
 779         netif_stop_queue(net);
 780
 781         /* We now decide whether we can put our special header into the sk_buff */
 782         if (skb_cloned(skb) || skb_headroom(skb) < 2) {
 783                 /* no such luck - we make our own */
 784                 struct sk_buff *copied_skb;
 785                 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC);
 786                 dev_kfree_skb_irq(skb);
 787                 skb = copied_skb;
 788                 if (!copied_skb) {
 789                         kaweth->stats.tx_errors++;
 790                         netif_start_queue(net);
 791                         spin_unlock(&kaweth->device_lock);
 792                         return 0;
 793                 }
 794         }
 795
 796         private_header = (u16 *)__skb_push(skb, 2);
 797         *private_header = cpu_to_le16(skb->len-2);
 798         kaweth->tx_skb = skb;
 799
 800         usb_fill_bulk_urb(kaweth->tx_urb,
 801                       kaweth->dev,
 802                       usb_sndbulkpipe(kaweth->dev, 2),
 803                       private_header,
 804                       skb->len,
 805                       kaweth_usb_transmit_complete,
 806                       kaweth);
 807         kaweth->end = 0;
 808         kaweth->tx_urb->transfer_flags |= URB_ASYNC_UNLINK;
 809
 810         if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
 811         {
 812                 kaweth_warn("kaweth failed tx_urb %d", res);
 813                 kaweth->stats.tx_errors++;
 814
 815                 netif_start_queue(net);
 816                 dev_kfree_skb_irq(skb);
 817         }
 818         else
 819         {
 820                 kaweth->stats.tx_packets++;
 821                 kaweth->stats.tx_bytes += skb->len;
 822                 net->trans_start = jiffies;
 823         }
 824
 825         spin_unlock(&kaweth->device_lock);
 826
 827         return 0;
 828 }
 829
 830 /****************************************************************
 831  *     kaweth_set_rx_mode
 832  ****************************************************************/
 833 static void kaweth_set_rx_mode(struct net_device *net)
 834 {
 835         struct kaweth_device *kaweth = net->priv;
 836
 837         __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
 838                                      KAWETH_PACKET_FILTER_BROADCAST |
 839                                      KAWETH_PACKET_FILTER_MULTICAST;
 840
 841         kaweth_dbg("Setting Rx mode to %d", packet_filter_bitmap);
 842
 843         netif_stop_queue(net);
 844
 845         if (net->flags & IFF_PROMISC) {
 846                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
 847         }
 848         else if ((net->mc_count) || (net->flags & IFF_ALLMULTI)) {
 849                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
 850         }
 851
 852         kaweth->packet_filter_bitmap = packet_filter_bitmap;
 853         netif_wake_queue(net);
 854 }
 855
 856 /****************************************************************
 857  *     kaweth_async_set_rx_mode
 858  ****************************************************************/
 859 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
 860 {
 861         __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
 862         kaweth->packet_filter_bitmap = 0;
 863         if (packet_filter_bitmap == 0)
 864                 return;
 865
 866         {
 867         int result;
 868         result = kaweth_control(kaweth,
 869                                 usb_sndctrlpipe(kaweth->dev, 0),
 870                                 KAWETH_COMMAND_SET_PACKET_FILTER,
 871                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 872                                 packet_filter_bitmap,
 873                                 0,
 874                                 (void *)&kaweth->scratch,
 875                                 0,
 876                                 KAWETH_CONTROL_TIMEOUT);
 877
 878         if(result < 0) {
 879                 kaweth_err("Failed to set Rx mode: %d", result);
 880         }
 881         else {
 882                 kaweth_dbg("Set Rx mode to %d", packet_filter_bitmap);
 883         }
 884         }
 885 }
 886
 887 /****************************************************************
 888  *     kaweth_netdev_stats
 889  ****************************************************************/
 890 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev)
 891 {
 892         return &((struct kaweth_device *)dev->priv)->stats;
 893 }
 894
 895 /****************************************************************
 896  *     kaweth_tx_timeout
 897  ****************************************************************/
 898 static void kaweth_tx_timeout(struct net_device *net)
 899 {
 900         struct kaweth_device *kaweth = net->priv;
 901
 902         kaweth_warn("%s: Tx timed out. Resetting.", net->name);
 903         kaweth->stats.tx_errors++;
 904         net->trans_start = jiffies;
 905
 906         usb_unlink_urb(kaweth->tx_urb);
 907 }
 908
 909 /****************************************************************
 910  *     kaweth_probe
 911  ****************************************************************/
 912 static int kaweth_probe(
 913                 struct usb_interface *intf,
 914                 const struct usb_device_id *id      /* from id_table */
 915         )
 916 {
 917         struct usb_device *dev = interface_to_usbdev(intf);
 918         struct kaweth_device *kaweth;
 919         struct net_device *netdev;
 920         const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 921         int result = 0;
 922
 923         kaweth_dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x",
 924                  dev->devnum,
 925                  (int)dev->descriptor.idVendor,
 926                  (int)dev->descriptor.idProduct,
 927                  (int)dev->descriptor.bcdDevice);
 928
 929         kaweth_dbg("Device at %p", dev);
 930
 931         kaweth_dbg("Descriptor length: %x type: %x",
 932                  (int)dev->descriptor.bLength,
 933                  (int)dev->descriptor.bDescriptorType);
 934
 935         if(!(kaweth = kmalloc(sizeof(struct kaweth_device), GFP_KERNEL)))
 936                 return -ENOMEM;
 937
 938         memset(kaweth, 0, sizeof(struct kaweth_device));
 939
 940         kaweth->dev = dev;
 941         spin_lock_init(&kaweth->device_lock);
 942         init_waitqueue_head(&kaweth->term_wait);
 943
 944         kaweth_dbg("Resetting.");
 945
 946         kaweth_reset(kaweth);
 947
 948         /*
 949          * If high byte of bcdDevice is nonzero, firmware is already
 950          * downloaded. Don't try to do it again, or we'll hang the device.
 951          */
 952
 953         if (dev->descriptor.bcdDevice >> 8) {
 954                 kaweth_info("Firmware present in device.");
 955         } else {
 956                 /* Download the firmware */
 957                 kaweth_info("Downloading firmware...");
 958                 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
 959                 if ((result = kaweth_download_firmware(kaweth,
 960                                                       kaweth_new_code,
 961                                                       len_kaweth_new_code,
 962                                                       100,
 963                                                       2)) < 0) {
 964                         kaweth_err("Error downloading firmware (%d)", result);
 965                         free_page((unsigned long)kaweth->firmware_buf);
 966                         kfree(kaweth);
 967                         return -EIO;
 968                 }
 969
 970                 if ((result = kaweth_download_firmware(kaweth,
 971                                                       kaweth_new_code_fix,
 972                                                       len_kaweth_new_code_fix,
 973                                                       100,
 974                                                       3)) < 0) {
 975                         kaweth_err("Error downloading firmware fix (%d)", result);
 976                         free_page((unsigned long)kaweth->firmware_buf);
 977                         kfree(kaweth);
 978                         return -EIO;
 979                 }
 980
 981                 if ((result = kaweth_download_firmware(kaweth,
 982                                                       kaweth_trigger_code,
 983                                                       len_kaweth_trigger_code,
 984                                                       126,
 985                                                       2)) < 0) {
 986                         kaweth_err("Error downloading trigger code (%d)", result);
 987                         free_page((unsigned long)kaweth->firmware_buf);
 988                         kfree(kaweth);
 989                         return -EIO;
 990                 }
 991
 992                 if ((result = kaweth_download_firmware(kaweth,
 993                                                       kaweth_trigger_code_fix,
 994                                                       len_kaweth_trigger_code_fix,
 995                                                       126,
 996                                                       3)) < 0) {
 997                         kaweth_err("Error downloading trigger code fix (%d)", result);
 998                         free_page((unsigned long)kaweth->firmware_buf);
 999                         kfree(kaweth);
1000                         return -EIO;
1001                 }
1002
1003
1004                 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
1005                         kaweth_err("Error triggering firmware (%d)", result);
1006                         free_page((unsigned long)kaweth->firmware_buf);
1007                         kfree(kaweth);
1008                         return -EIO;
1009                 }
1010
1011                 /* Device will now disappear for a moment...  */
1012                 kaweth_info("Firmware loaded.  I'll be back...");
1013                 free_page((unsigned long)kaweth->firmware_buf);
1014                 kfree(kaweth);
1015                 return -EIO;
1016         }
1017
1018         result = kaweth_read_configuration(kaweth);
1019
1020         if(result < 0) {
1021                 kaweth_err("Error reading configuration (%d), no net device created", result);
1022                 kfree(kaweth);
1023                 return -EIO;
1024         }
1025
1026         kaweth_info("Statistics collection: %x", kaweth->configuration.statistics_mask);
1027         kaweth_info("Multicast filter limit: %x", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
1028         kaweth_info("MTU: %d", le16_to_cpu(kaweth->configuration.segment_size));
1029         kaweth_info("Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
1030                  (int)kaweth->configuration.hw_addr[0],
1031                  (int)kaweth->configuration.hw_addr[1],
1032                  (int)kaweth->configuration.hw_addr[2],
1033                  (int)kaweth->configuration.hw_addr[3],
1034                  (int)kaweth->configuration.hw_addr[4],
1035                  (int)kaweth->configuration.hw_addr[5]);
1036
1037         if(!memcmp(&kaweth->configuration.hw_addr,
1038                    &bcast_addr,
1039                    sizeof(bcast_addr))) {
1040                 kaweth_err("Firmware not functioning properly, no net device created");
1041                 kfree(kaweth);
1042                 return -EIO;
1043         }
1044
1045         if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
1046                 kaweth_dbg("Error setting URB size");
1047                 goto err_no_netdev;
1048         }
1049
1050         if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
1051                 kaweth_err("Error setting SOFS wait");
1052                 goto err_no_netdev;
1053         }
1054
1055         result = kaweth_set_receive_filter(kaweth,
1056                                            KAWETH_PACKET_FILTER_DIRECTED |
1057                                            KAWETH_PACKET_FILTER_BROADCAST |
1058                                            KAWETH_PACKET_FILTER_MULTICAST);
1059
1060         if(result < 0) {
1061                 kaweth_err("Error setting receive filter");
1062                 kfree(kaweth);
1063                 return -EIO;
1064         }
1065
1066         kaweth_dbg("Initializing net device.");
1067
1068         if (!(netdev = alloc_etherdev(0))) {
1069                 kfree(kaweth);
1070                 return -ENOMEM;
1071         }
1072
1073         kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1074         if (!kaweth->tx_urb)
1075                 goto err_no_urb;
1076         kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1077         if (!kaweth->rx_urb)
1078                 goto err_only_tx;
1079         kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1080         if (!kaweth->irq_urb)
1081                 goto err_tx_and_rx;
1082
1083         kaweth->intbuffer = usb_buffer_alloc(   kaweth->dev,
1084                                                 INTBUFFERSIZE,
1085                                                 GFP_KERNEL,
1086                                                 &kaweth->intbufferhandle);
1087         if (!kaweth->intbuffer)
1088                 goto err_tx_and_rx_and_irq;
1089         kaweth->rx_buf = usb_buffer_alloc(      kaweth->dev,
1090                                                 KAWETH_BUF_SIZE,
1091                                                 GFP_KERNEL,
1092                                                 &kaweth->rxbufferhandle);
1093         if (!kaweth->rx_buf)
1094                 goto err_all_but_rxbuf;
1095
1096         kaweth->net = netdev;
1097         memcpy(kaweth->net->broadcast, &bcast_addr, sizeof(bcast_addr));
1098         memcpy(kaweth->net->dev_addr,
1099                &kaweth->configuration.hw_addr,
1100                sizeof(kaweth->configuration.hw_addr));
1101
1102         kaweth->net->priv = kaweth;
1103         kaweth->net->open = kaweth_open;
1104         kaweth->net->stop = kaweth_close;
1105
1106         kaweth->net->watchdog_timeo = KAWETH_TX_TIMEOUT;
1107         kaweth->net->tx_timeout = kaweth_tx_timeout;
1108
1109         kaweth->net->do_ioctl = kaweth_ioctl;
1110         kaweth->net->hard_start_xmit = kaweth_start_xmit;
1111         kaweth->net->set_multicast_list = kaweth_set_rx_mode;
1112         kaweth->net->get_stats = kaweth_netdev_stats;
1113         kaweth->net->mtu = le16_to_cpu(kaweth->configuration.segment_size);
1114
1115         memset(&kaweth->stats, 0, sizeof(kaweth->stats));
1116
1117         INIT_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl, (void *)kaweth);
1118
1119         SET_MODULE_OWNER(netdev);
1120
1121         usb_set_intfdata(intf, kaweth);
1122
1123 #if 0
1124 // dma_supported() is deeply broken on almost all architectures
1125         if (dma_supported (&intf->dev, 0xffffffffffffffffULL))
1126                 kaweth->net->features |= NETIF_F_HIGHDMA;
1127 #endif
1128
1129         SET_NETDEV_DEV(netdev, &intf->dev);
1130         if (register_netdev(netdev) != 0) {
1131                 kaweth_err("Error registering netdev.");
1132                 goto err_intfdata;
1133         }
1134
1135         kaweth_info("kaweth interface created at %s", kaweth->net->name);
1136
1137         kaweth_dbg("Kaweth probe returning.");
1138
1139         return 0;
1140
1141 err_intfdata:
1142         usb_set_intfdata(intf, NULL);
1143         usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1144 err_all_but_rxbuf:
1145         usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1146 err_tx_and_rx_and_irq:
1147         usb_free_urb(kaweth->irq_urb);
1148 err_tx_and_rx:
1149         usb_free_urb(kaweth->rx_urb);
1150 err_only_tx:
1151         usb_free_urb(kaweth->tx_urb);
1152 err_no_urb:
1153         free_netdev(netdev);
1154 err_no_netdev:
1155         kfree(kaweth);
1156         return -EIO;
1157 }
1158
1159 /****************************************************************
1160  *     kaweth_disconnect
1161  ****************************************************************/
1162 static void kaweth_disconnect(struct usb_interface *intf)
1163 {
1164         struct kaweth_device *kaweth = usb_get_intfdata(intf);
1165
1166         kaweth_info("Unregistering");
1167
1168         usb_set_intfdata(intf, NULL);
1169         if (!kaweth) {
1170                 kaweth_warn("unregistering non-existant device");
1171                 return;
1172         }
1173
1174         kaweth->removed = 1;
1175         usb_unlink_urb(kaweth->irq_urb);
1176         usb_unlink_urb(kaweth->rx_urb);
1177
1178         /* we need to wait for the urb to be cancelled, if it is active */
1179         spin_lock(&kaweth->device_lock);
1180         if (usb_unlink_urb(kaweth->tx_urb) == -EINPROGRESS) {
1181                 spin_unlock(&kaweth->device_lock);
1182                 wait_event(kaweth->term_wait, kaweth->end);
1183         } else {
1184                 spin_unlock(&kaweth->device_lock);
1185         }
1186
1187         if(kaweth->net) {
1188                 if(kaweth->net->flags & IFF_UP) {
1189                         kaweth_dbg("Closing net device");
1190                         dev_close(kaweth->net);
1191                 }
1192
1193                 kaweth_dbg("Unregistering net device");
1194                 unregister_netdev(kaweth->net);
1195                 free_netdev(kaweth->net);
1196         }
1197
1198         usb_free_urb(kaweth->rx_urb);
1199         usb_free_urb(kaweth->tx_urb);
1200         usb_free_urb(kaweth->irq_urb);
1201
1202
1203         usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1204         usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1205
1206         kfree(kaweth);
1207 }
1208
1209
1210 // FIXME this completion stuff is a modified clone of
1211 // an OLD version of some stuff in usb.c ...
1212 struct usb_api_data {
1213         wait_queue_head_t wqh;
1214         int done;
1215 };
1216
1217 /*-------------------------------------------------------------------*
1218  * completion handler for compatibility wrappers (sync control/bulk) *
1219  *-------------------------------------------------------------------*/
1220 static void usb_api_blocking_completion(struct urb *urb, struct pt_regs *regs)
1221 {
1222         struct usb_api_data *awd = (struct usb_api_data *)urb->context;
1223
1224         awd->done=1;
1225         wake_up(&awd->wqh);
1226 }
1227
1228 /*-------------------------------------------------------------------*
1229  *                         COMPATIBILITY STUFF                       *
1230  *-------------------------------------------------------------------*/
1231
1232 // Starts urb and waits for completion or timeout
1233 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
1234 {
1235         DECLARE_WAITQUEUE(wait, current);
1236         struct usb_api_data awd;
1237         int status;
1238
1239         init_waitqueue_head(&awd.wqh);
1240         awd.done = 0;
1241
1242         set_current_state(TASK_INTERRUPTIBLE);
1243         add_wait_queue(&awd.wqh, &wait);
1244         urb->context = &awd;
1245         status = usb_submit_urb(urb, GFP_ATOMIC);
1246         if (status) {
1247                 // something went wrong
1248                 usb_free_urb(urb);
1249                 set_current_state(TASK_RUNNING);
1250                 remove_wait_queue(&awd.wqh, &wait);
1251                 return status;
1252         }
1253
1254         while (timeout && !awd.done)
1255                 timeout = schedule_timeout(timeout);
1256
1257         set_current_state(TASK_RUNNING);
1258         remove_wait_queue(&awd.wqh, &wait);
1259
1260         if (!timeout) {
1261                 // timeout
1262                 kaweth_warn("usb_control/bulk_msg: timeout");
1263                 usb_unlink_urb(urb);  // remove urb safely
1264                 status = -ETIMEDOUT;
1265         }
1266         else {
1267                 status = urb->status;
1268         }
1269
1270         if (actual_length) {
1271                 *actual_length = urb->actual_length;
1272         }
1273
1274         usb_free_urb(urb);
1275         return status;
1276 }
1277
1278 /*-------------------------------------------------------------------*/
1279 // returns status (negative) or length (positive)
1280 int kaweth_internal_control_msg(struct usb_device *usb_dev, unsigned int pipe,
1281                             struct usb_ctrlrequest *cmd, void *data, int len,
1282                             int timeout)
1283 {
1284         struct urb *urb;
1285         int retv;
1286         int length;
1287
1288         urb = usb_alloc_urb(0, GFP_NOIO);
1289         if (!urb)
1290                 return -ENOMEM;
1291
1292         usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data,
1293                          len, usb_api_blocking_completion,0);
1294
1295         retv = usb_start_wait_urb(urb, timeout, &length);
1296         if (retv < 0) {
1297                 return retv;
1298         }
1299         else {
1300                 return length;
1301         }
1302 }
1303
1304
1305 /****************************************************************
1306  *     kaweth_init
1307  ****************************************************************/
1308 int __init kaweth_init(void)
1309 {
1310         kaweth_dbg("Driver loading");
1311         return usb_register(&kaweth_driver);
1312 }
1313
1314 /****************************************************************
1315  *     kaweth_exit
1316  ****************************************************************/
1317 void __exit kaweth_exit(void)
1318 {
1319         usb_deregister(&kaweth_driver);
1320 }
1321
1322 module_init(kaweth_init);
1323 module_exit(kaweth_exit);
1324
1325
1326
1327
1328
1329
1330
1331
1332