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 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
 127                                        unsigned int pipe,
 128                                        struct usb_ctrlrequest *cmd, void *data,
 129                                        int len, int timeout);
 130
 131 /****************************************************************
 132  *     usb_device_id
 133  ****************************************************************/
 134 static struct usb_device_id usb_klsi_table[] = {
 135         { USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */
 136         { USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */
 137         { USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */
 138         { USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */
 139         { USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */
 140         { USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */
 141         { USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */
 142         { USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */
 143         { USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */
 144         { USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */
 145         { USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */
 146         { USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */
 147         { USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */
 148         { USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */
 149         { USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */
 150         { USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */
 151         { USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */
 152         { USB_DEVICE(0x0846, 0x1001) }, /* NetGear EA-101 */
 153         { USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */
 154         { USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */
 155         { USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */
 156         { USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */
 157         { USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */
 158         { USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */
 159         { USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */
 160         { USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */
 161         { USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */
 162         { USB_DEVICE(0x1485, 0x0001) }, /* Silicom U2E */
 163         { USB_DEVICE(0x1645, 0x0005) }, /* Entrega E45 */
 164         { USB_DEVICE(0x1645, 0x0008) }, /* Entrega USB Ethernet Adapter */
 165         { USB_DEVICE(0x1645, 0x8005) }, /* PortGear Ethernet Adapter */
 166         { USB_DEVICE(0x2001, 0x4000) }, /* D-link DSB-650C */
 167         {} /* Null terminator */
 168 };
 169
 170 MODULE_DEVICE_TABLE (usb, usb_klsi_table);
 171
 172 /****************************************************************
 173  *     kaweth_driver
 174  ****************************************************************/
 175 static struct usb_driver kaweth_driver = {
 176         .owner =        THIS_MODULE,
 177         .name =         driver_name,
 178         .probe =        kaweth_probe,
 179         .disconnect =   kaweth_disconnect,
 180         .id_table =     usb_klsi_table,
 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         __u16 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 removed;
 221         int suspend_lowmem_rx;
 222         int suspend_lowmem_ctrl;
 223         int linkstate;
 224         struct work_struct lowmem_work;
 225
 226         struct usb_device *dev;
 227         struct net_device *net;
 228         wait_queue_head_t term_wait;
 229
 230         struct urb *rx_urb;
 231         struct urb *tx_urb;
 232         struct urb *irq_urb;
 233
 234         dma_addr_t intbufferhandle;
 235         __u8 *intbuffer;
 236         dma_addr_t rxbufferhandle;
 237         __u8 *rx_buf;
 238
 239
 240         struct sk_buff *tx_skb;
 241
 242         __u8 *firmware_buf;
 243         __u8 scratch[KAWETH_SCRATCH_SIZE];
 244         __u16 packet_filter_bitmap;
 245
 246         struct kaweth_ethernet_configuration configuration;
 247
 248         struct net_device_stats stats;
 249 } __attribute__ ((packed));
 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
 267         kaweth_dbg("kaweth_control()");
 268
 269         if(in_interrupt()) {
 270                 kaweth_dbg("in_interrupt()");
 271                 return -EBUSY;
 272         }
 273
 274         dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
 275
 276         if (!dr) {
 277                 kaweth_dbg("kmalloc() failed");
 278                 return -ENOMEM;
 279         }
 280
 281         dr->bRequestType= requesttype;
 282         dr->bRequest = request;
 283         dr->wValue = cpu_to_le16p(&value);
 284         dr->wIndex = cpu_to_le16p(&index);
 285         dr->wLength = cpu_to_le16p(&size);
 286
 287         return kaweth_internal_control_msg(kaweth->dev,
 288                                         pipe,
 289                                         dr,
 290                                         data,
 291                                         size,
 292                                         timeout);
 293 }
 294
 295 /****************************************************************
 296  *     kaweth_read_configuration
 297  ****************************************************************/
 298 static int kaweth_read_configuration(struct kaweth_device *kaweth)
 299 {
 300         int retval;
 301
 302         kaweth_dbg("Reading kaweth configuration");
 303
 304         retval = kaweth_control(kaweth,
 305                                 usb_rcvctrlpipe(kaweth->dev, 0),
 306                                 KAWETH_COMMAND_GET_ETHERNET_DESC,
 307                                 USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE,
 308                                 0,
 309                                 0,
 310                                 (void *)&kaweth->configuration,
 311                                 sizeof(kaweth->configuration),
 312                                 KAWETH_CONTROL_TIMEOUT);
 313
 314         return retval;
 315 }
 316
 317 /****************************************************************
 318  *     kaweth_set_urb_size
 319  ****************************************************************/
 320 static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size)
 321 {
 322         int retval;
 323
 324         kaweth_dbg("Setting URB size to %d", (unsigned)urb_size);
 325
 326         retval = kaweth_control(kaweth,
 327                                 usb_sndctrlpipe(kaweth->dev, 0),
 328                                 KAWETH_COMMAND_SET_URB_SIZE,
 329                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 330                                 urb_size,
 331                                 0,
 332                                 (void *)&kaweth->scratch,
 333                                 0,
 334                                 KAWETH_CONTROL_TIMEOUT);
 335
 336         return retval;
 337 }
 338
 339 /****************************************************************
 340  *     kaweth_set_sofs_wait
 341  ****************************************************************/
 342 static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait)
 343 {
 344         int retval;
 345
 346         kaweth_dbg("Set SOFS wait to %d", (unsigned)sofs_wait);
 347
 348         retval = kaweth_control(kaweth,
 349                                 usb_sndctrlpipe(kaweth->dev, 0),
 350                                 KAWETH_COMMAND_SET_SOFS_WAIT,
 351                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 352                                 sofs_wait,
 353                                 0,
 354                                 (void *)&kaweth->scratch,
 355                                 0,
 356                                 KAWETH_CONTROL_TIMEOUT);
 357
 358         return retval;
 359 }
 360
 361 /****************************************************************
 362  *     kaweth_set_receive_filter
 363  ****************************************************************/
 364 static int kaweth_set_receive_filter(struct kaweth_device *kaweth,
 365                                      __u16 receive_filter)
 366 {
 367         int retval;
 368
 369         kaweth_dbg("Set receive filter to %d", (unsigned)receive_filter);
 370
 371         retval = kaweth_control(kaweth,
 372                                 usb_sndctrlpipe(kaweth->dev, 0),
 373                                 KAWETH_COMMAND_SET_PACKET_FILTER,
 374                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 375                                 receive_filter,
 376                                 0,
 377                                 (void *)&kaweth->scratch,
 378                                 0,
 379                                 KAWETH_CONTROL_TIMEOUT);
 380
 381         return retval;
 382 }
 383
 384 /****************************************************************
 385  *     kaweth_download_firmware
 386  ****************************************************************/
 387 static int kaweth_download_firmware(struct kaweth_device *kaweth,
 388                                     __u8 *data,
 389                                     __u16 data_len,
 390                                     __u8 interrupt,
 391                                     __u8 type)
 392 {
 393         if(data_len > KAWETH_FIRMWARE_BUF_SIZE) {
 394                 kaweth_err("Firmware too big: %d", data_len);
 395                 return -ENOSPC;
 396         }
 397
 398         memcpy(kaweth->firmware_buf, data, data_len);
 399
 400         kaweth->firmware_buf[2] = (data_len & 0xFF) - 7;
 401         kaweth->firmware_buf[3] = data_len >> 8;
 402         kaweth->firmware_buf[4] = type;
 403         kaweth->firmware_buf[5] = interrupt;
 404
 405         kaweth_dbg("High: %i, Low:%i", kaweth->firmware_buf[3],
 406                    kaweth->firmware_buf[2]);
 407
 408         kaweth_dbg("Downloading firmware at %p to kaweth device at %p",
 409             data,
 410             kaweth);
 411         kaweth_dbg("Firmware length: %d", data_len);
 412
 413         return kaweth_control(kaweth,
 414                               usb_sndctrlpipe(kaweth->dev, 0),
 415                               KAWETH_COMMAND_SCAN,
 416                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 417                               0,
 418                               0,
 419                               (void *)kaweth->firmware_buf,
 420                               data_len,
 421                               KAWETH_CONTROL_TIMEOUT);
 422 }
 423
 424 /****************************************************************
 425  *     kaweth_trigger_firmware
 426  ****************************************************************/
 427 static int kaweth_trigger_firmware(struct kaweth_device *kaweth,
 428                                    __u8 interrupt)
 429 {
 430         kaweth->firmware_buf[0] = 0xB6;
 431         kaweth->firmware_buf[1] = 0xC3;
 432         kaweth->firmware_buf[2] = 0x01;
 433         kaweth->firmware_buf[3] = 0x00;
 434         kaweth->firmware_buf[4] = 0x06;
 435         kaweth->firmware_buf[5] = interrupt;
 436         kaweth->firmware_buf[6] = 0x00;
 437         kaweth->firmware_buf[7] = 0x00;
 438
 439         kaweth_dbg("Triggering firmware");
 440
 441         return kaweth_control(kaweth,
 442                               usb_sndctrlpipe(kaweth->dev, 0),
 443                               KAWETH_COMMAND_SCAN,
 444                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 445                               0,
 446                               0,
 447                               (void *)kaweth->firmware_buf,
 448                               8,
 449                               KAWETH_CONTROL_TIMEOUT);
 450 }
 451
 452 /****************************************************************
 453  *     kaweth_reset
 454  ****************************************************************/
 455 static int kaweth_reset(struct kaweth_device *kaweth)
 456 {
 457         int result;
 458
 459         kaweth_dbg("kaweth_reset(%p)", kaweth);
 460         result = kaweth_control(kaweth,
 461                                 usb_sndctrlpipe(kaweth->dev, 0),
 462                                 USB_REQ_SET_CONFIGURATION,
 463                                 0,
 464                                 kaweth->dev->config[0].desc.bConfigurationValue,
 465                                 0,
 466                                 NULL,
 467                                 0,
 468                                 KAWETH_CONTROL_TIMEOUT);
 469
 470         udelay(10000);
 471
 472         kaweth_dbg("kaweth_reset() returns %d.",result);
 473
 474         return result;
 475 }
 476
 477 static void kaweth_usb_receive(struct urb *, struct pt_regs *regs);
 478 static int kaweth_resubmit_rx_urb(struct kaweth_device *, int);
 479
 480 /****************************************************************
 481         int_callback
 482 *****************************************************************/
 483
 484 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, int mf)
 485 {
 486         int status;
 487
 488         status = usb_submit_urb (kaweth->irq_urb, mf);
 489         if (unlikely(status == -ENOMEM)) {
 490                 kaweth->suspend_lowmem_ctrl = 1;
 491                 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
 492         } else {
 493                 kaweth->suspend_lowmem_ctrl = 0;
 494         }
 495
 496         if (status)
 497                 err ("can't resubmit intr, %s-%s, status %d",
 498                                 kaweth->dev->bus->bus_name,
 499                                 kaweth->dev->devpath, status);
 500 }
 501
 502 static void int_callback(struct urb *u, struct pt_regs *regs)
 503 {
 504         struct kaweth_device *kaweth = u->context;
 505         int act_state;
 506
 507         switch (u->status) {
 508         case 0:                 /* success */
 509                 break;
 510         case -ECONNRESET:       /* unlink */
 511         case -ENOENT:
 512         case -ESHUTDOWN:
 513                 return;
 514         /* -EPIPE:  should clear the halt */
 515         default:                /* error */
 516                 goto resubmit;
 517         }
 518
 519         /* we check the link state to report changes */
 520         if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) {
 521                 if (!act_state)
 522                         netif_carrier_on(kaweth->net);
 523                 else
 524                         netif_carrier_off(kaweth->net);
 525
 526                 kaweth->linkstate = act_state;
 527         }
 528 resubmit:
 529         kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC);
 530 }
 531
 532 static void kaweth_resubmit_tl(void *d)
 533 {
 534         struct kaweth_device *kaweth = (struct kaweth_device *)d;
 535
 536         if (kaweth->status | KAWETH_STATUS_CLOSING)
 537                 return;
 538
 539         if (kaweth->suspend_lowmem_rx)
 540                 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
 541
 542         if (kaweth->suspend_lowmem_ctrl)
 543                 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
 544 }
 545
 546
 547 /****************************************************************
 548  *     kaweth_resubmit_rx_urb
 549  ****************************************************************/
 550 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth,
 551                                                 int mem_flags)
 552 {
 553         int result;
 554
 555         usb_fill_bulk_urb(kaweth->rx_urb,
 556                       kaweth->dev,
 557                       usb_rcvbulkpipe(kaweth->dev, 1),
 558                       kaweth->rx_buf,
 559                       KAWETH_BUF_SIZE,
 560                       kaweth_usb_receive,
 561                       kaweth);
 562         kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 563         kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle;
 564
 565         if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) {
 566                 if (result == -ENOMEM) {
 567                         kaweth->suspend_lowmem_rx = 1;
 568                         schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
 569                 }
 570                 kaweth_err("resubmitting rx_urb %d failed", result);
 571         } else {
 572                 kaweth->suspend_lowmem_rx = 0;
 573         }
 574
 575         return result;
 576 }
 577
 578 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth);
 579
 580 /****************************************************************
 581  *     kaweth_usb_receive
 582  ****************************************************************/
 583 static void kaweth_usb_receive(struct urb *urb, struct pt_regs *regs)
 584 {
 585         struct kaweth_device *kaweth = urb->context;
 586         struct net_device *net = kaweth->net;
 587
 588         int count = urb->actual_length;
 589         int count2 = urb->transfer_buffer_length;
 590
 591         __u16 pkt_len = le16_to_cpup((u16 *)kaweth->rx_buf);
 592
 593         struct sk_buff *skb;
 594
 595         if(unlikely(urb->status == -ECONNRESET || urb->status == -ECONNABORTED))
 596         /* we are killed - set a flag and wake the disconnect handler */
 597         {
 598                 kaweth->end = 1;
 599                 wake_up(&kaweth->term_wait);
 600                 return;
 601         }
 602
 603         if (kaweth->status & KAWETH_STATUS_CLOSING)
 604                 return;
 605
 606         if(urb->status && urb->status != -EREMOTEIO && count != 1) {
 607                 kaweth_err("%s RX status: %d count: %d packet_len: %d",
 608                            net->name,
 609                            urb->status,
 610                            count,
 611                            (int)pkt_len);
 612                 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 613                 return;
 614         }
 615
 616         if(kaweth->net && (count > 2)) {
 617                 if(pkt_len > (count - 2)) {
 618                         kaweth_err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count);
 619                         kaweth_err("Packet len & 2047: %x", pkt_len & 2047);
 620                         kaweth_err("Count 2: %x", count2);
 621                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 622                         return;
 623                 }
 624
 625                 if(!(skb = dev_alloc_skb(pkt_len+2))) {
 626                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 627                         return;
 628                 }
 629
 630                 skb_reserve(skb, 2);    /* Align IP on 16 byte boundaries */
 631
 632                 skb->dev = net;
 633
 634                 eth_copy_and_sum(skb, kaweth->rx_buf + 2, pkt_len, 0);
 635
 636                 skb_put(skb, pkt_len);
 637
 638                 skb->protocol = eth_type_trans(skb, net);
 639
 640                 netif_rx(skb);
 641
 642                 kaweth->stats.rx_packets++;
 643                 kaweth->stats.rx_bytes += pkt_len;
 644         }
 645
 646         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 647 }
 648
 649 /****************************************************************
 650  *     kaweth_open
 651  ****************************************************************/
 652 static int kaweth_open(struct net_device *net)
 653 {
 654         struct kaweth_device *kaweth = (struct kaweth_device *)net->priv;
 655         int res;
 656
 657         kaweth_dbg("Opening network device.");
 658
 659         res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL);
 660         if (res)
 661                 return -EIO;
 662
 663         usb_fill_int_urb(
 664                 kaweth->irq_urb,
 665                 kaweth->dev,
 666                 usb_rcvintpipe(kaweth->dev, 3),
 667                 kaweth->intbuffer,
 668                 INTBUFFERSIZE,
 669                 int_callback,
 670                 kaweth,
 671                 HZ/4);
 672         kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle;
 673         kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 674
 675         res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL);
 676         if (res) {
 677                 usb_unlink_urb(kaweth->rx_urb);
 678                 return -EIO;
 679         }
 680
 681         netif_start_queue(net);
 682
 683         kaweth_async_set_rx_mode(kaweth);
 684         return 0;
 685 }
 686
 687 /****************************************************************
 688  *     kaweth_close
 689  ****************************************************************/
 690 static int kaweth_close(struct net_device *net)
 691 {
 692         struct kaweth_device *kaweth = net->priv;
 693
 694         netif_stop_queue(net);
 695
 696         kaweth->status |= KAWETH_STATUS_CLOSING;
 697
 698         usb_unlink_urb(kaweth->irq_urb);
 699         usb_unlink_urb(kaweth->rx_urb);
 700
 701         flush_scheduled_work();
 702
 703         /* a scheduled work may have resubmitted,
 704            we hit them again */
 705         usb_unlink_urb(kaweth->irq_urb);
 706         usb_unlink_urb(kaweth->rx_urb);
 707
 708         kaweth->status &= ~KAWETH_STATUS_CLOSING;
 709
 710         return 0;
 711 }
 712
 713 static int netdev_ethtool_ioctl(struct net_device *dev, void __user *useraddr)
 714 {
 715         u32 ethcmd;
 716
 717         if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
 718                 return -EFAULT;
 719
 720         switch (ethcmd) {
 721         case ETHTOOL_GDRVINFO: {
 722                 struct ethtool_drvinfo info = {ETHTOOL_GDRVINFO};
 723                 strlcpy(info.driver, driver_name, sizeof(info.driver));
 724                 if (copy_to_user(useraddr, &info, sizeof(info)))
 725                         return -EFAULT;
 726                 return 0;
 727         }
 728         }
 729
 730         return -EOPNOTSUPP;
 731 }
 732
 733 /****************************************************************
 734  *     kaweth_ioctl
 735  ****************************************************************/
 736 static int kaweth_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
 737 {
 738         switch (cmd) {
 739         case SIOCETHTOOL:
 740                 return netdev_ethtool_ioctl(net, rq->ifr_data);
 741         }
 742         return -EOPNOTSUPP;
 743 }
 744
 745 /****************************************************************
 746  *     kaweth_usb_transmit_complete
 747  ****************************************************************/
 748 static void kaweth_usb_transmit_complete(struct urb *urb, struct pt_regs *regs)
 749 {
 750         struct kaweth_device *kaweth = urb->context;
 751         struct sk_buff *skb = kaweth->tx_skb;
 752
 753         if (unlikely(urb->status != 0))
 754                 kaweth_dbg("%s: TX status %d.", kaweth->net->name, urb->status);
 755
 756         netif_wake_queue(kaweth->net);
 757         dev_kfree_skb_irq(skb);
 758 }
 759
 760 /****************************************************************
 761  *     kaweth_start_xmit
 762  ****************************************************************/
 763 static int kaweth_start_xmit(struct sk_buff *skb, struct net_device *net)
 764 {
 765         struct kaweth_device *kaweth = net->priv;
 766         u16 *private_header;
 767
 768         int res;
 769
 770         spin_lock(&kaweth->device_lock);
 771
 772         if (kaweth->removed) {
 773         /* our device is undergoing disconnection - we bail out */
 774                 spin_unlock(&kaweth->device_lock);
 775                 dev_kfree_skb_irq(skb);
 776                 return 0;
 777         }
 778
 779         kaweth_async_set_rx_mode(kaweth);
 780         netif_stop_queue(net);
 781
 782         /* We now decide whether we can put our special header into the sk_buff */
 783         if (skb_cloned(skb) || skb_headroom(skb) < 2) {
 784                 /* no such luck - we make our own */
 785                 struct sk_buff *copied_skb;
 786                 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC);
 787                 dev_kfree_skb_irq(skb);
 788                 skb = copied_skb;
 789                 if (!copied_skb) {
 790                         kaweth->stats.tx_errors++;
 791                         netif_start_queue(net);
 792                         spin_unlock(&kaweth->device_lock);
 793                         return 0;
 794                 }
 795         }
 796
 797         private_header = (u16 *)__skb_push(skb, 2);
 798         *private_header = cpu_to_le16(skb->len-2);
 799         kaweth->tx_skb = skb;
 800
 801         usb_fill_bulk_urb(kaweth->tx_urb,
 802                       kaweth->dev,
 803                       usb_sndbulkpipe(kaweth->dev, 2),
 804                       private_header,
 805                       skb->len,
 806                       kaweth_usb_transmit_complete,
 807                       kaweth);
 808         kaweth->end = 0;
 809         kaweth->tx_urb->transfer_flags |= URB_ASYNC_UNLINK;
 810
 811         if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
 812         {
 813                 kaweth_warn("kaweth failed tx_urb %d", res);
 814                 kaweth->stats.tx_errors++;
 815
 816                 netif_start_queue(net);
 817                 dev_kfree_skb_irq(skb);
 818         }
 819         else
 820         {
 821                 kaweth->stats.tx_packets++;
 822                 kaweth->stats.tx_bytes += skb->len;
 823                 net->trans_start = jiffies;
 824         }
 825
 826         spin_unlock(&kaweth->device_lock);
 827
 828         return 0;
 829 }
 830
 831 /****************************************************************
 832  *     kaweth_set_rx_mode
 833  ****************************************************************/
 834 static void kaweth_set_rx_mode(struct net_device *net)
 835 {
 836         struct kaweth_device *kaweth = net->priv;
 837
 838         __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
 839                                      KAWETH_PACKET_FILTER_BROADCAST |
 840                                      KAWETH_PACKET_FILTER_MULTICAST;
 841
 842         kaweth_dbg("Setting Rx mode to %d", packet_filter_bitmap);
 843
 844         netif_stop_queue(net);
 845
 846         if (net->flags & IFF_PROMISC) {
 847                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
 848         }
 849         else if ((net->mc_count) || (net->flags & IFF_ALLMULTI)) {
 850                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
 851         }
 852
 853         kaweth->packet_filter_bitmap = packet_filter_bitmap;
 854         netif_wake_queue(net);
 855 }
 856
 857 /****************************************************************
 858  *     kaweth_async_set_rx_mode
 859  ****************************************************************/
 860 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
 861 {
 862         __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
 863         kaweth->packet_filter_bitmap = 0;
 864         if (packet_filter_bitmap == 0)
 865                 return;
 866
 867         {
 868         int result;
 869         result = kaweth_control(kaweth,
 870                                 usb_sndctrlpipe(kaweth->dev, 0),
 871                                 KAWETH_COMMAND_SET_PACKET_FILTER,
 872                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 873                                 packet_filter_bitmap,
 874                                 0,
 875                                 (void *)&kaweth->scratch,
 876                                 0,
 877                                 KAWETH_CONTROL_TIMEOUT);
 878
 879         if(result < 0) {
 880                 kaweth_err("Failed to set Rx mode: %d", result);
 881         }
 882         else {
 883                 kaweth_dbg("Set Rx mode to %d", packet_filter_bitmap);
 884         }
 885         }
 886 }
 887
 888 /****************************************************************
 889  *     kaweth_netdev_stats
 890  ****************************************************************/
 891 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev)
 892 {
 893         return &((struct kaweth_device *)dev->priv)->stats;
 894 }
 895
 896 /****************************************************************
 897  *     kaweth_tx_timeout
 898  ****************************************************************/
 899 static void kaweth_tx_timeout(struct net_device *net)
 900 {
 901         struct kaweth_device *kaweth = net->priv;
 902
 903         kaweth_warn("%s: Tx timed out. Resetting.", net->name);
 904         kaweth->stats.tx_errors++;
 905         net->trans_start = jiffies;
 906
 907         usb_unlink_urb(kaweth->tx_urb);
 908 }
 909
 910 /****************************************************************
 911  *     kaweth_probe
 912  ****************************************************************/
 913 static int kaweth_probe(
 914                 struct usb_interface *intf,
 915                 const struct usb_device_id *id      /* from id_table */
 916         )
 917 {
 918         struct usb_device *dev = interface_to_usbdev(intf);
 919         struct kaweth_device *kaweth;
 920         struct net_device *netdev;
 921         const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 922         int result = 0;
 923
 924         kaweth_dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x",
 925                  dev->devnum,
 926                  (int)dev->descriptor.idVendor,
 927                  (int)dev->descriptor.idProduct,
 928                  (int)dev->descriptor.bcdDevice);
 929
 930         kaweth_dbg("Device at %p", dev);
 931
 932         kaweth_dbg("Descriptor length: %x type: %x",
 933                  (int)dev->descriptor.bLength,
 934                  (int)dev->descriptor.bDescriptorType);
 935
 936         if(!(kaweth = kmalloc(sizeof(struct kaweth_device), GFP_KERNEL)))
 937                 return -ENOMEM;
 938
 939         memset(kaweth, 0, sizeof(struct kaweth_device));
 940
 941         kaweth->dev = dev;
 942         spin_lock_init(&kaweth->device_lock);
 943         init_waitqueue_head(&kaweth->term_wait);
 944
 945         kaweth_dbg("Resetting.");
 946
 947         kaweth_reset(kaweth);
 948
 949         /*
 950          * If high byte of bcdDevice is nonzero, firmware is already
 951          * downloaded. Don't try to do it again, or we'll hang the device.
 952          */
 953
 954         if (dev->descriptor.bcdDevice >> 8) {
 955                 kaweth_info("Firmware present in device.");
 956         } else {
 957                 /* Download the firmware */
 958                 kaweth_info("Downloading firmware...");
 959                 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
 960                 if ((result = kaweth_download_firmware(kaweth,
 961                                                       kaweth_new_code,
 962                                                       len_kaweth_new_code,
 963                                                       100,
 964                                                       2)) < 0) {
 965                         kaweth_err("Error downloading firmware (%d)", result);
 966                         free_page((unsigned long)kaweth->firmware_buf);
 967                         kfree(kaweth);
 968                         return -EIO;
 969                 }
 970
 971                 if ((result = kaweth_download_firmware(kaweth,
 972                                                       kaweth_new_code_fix,
 973                                                       len_kaweth_new_code_fix,
 974                                                       100,
 975                                                       3)) < 0) {
 976                         kaweth_err("Error downloading firmware fix (%d)", result);
 977                         free_page((unsigned long)kaweth->firmware_buf);
 978                         kfree(kaweth);
 979                         return -EIO;
 980                 }
 981
 982                 if ((result = kaweth_download_firmware(kaweth,
 983                                                       kaweth_trigger_code,
 984                                                       len_kaweth_trigger_code,
 985                                                       126,
 986                                                       2)) < 0) {
 987                         kaweth_err("Error downloading trigger code (%d)", result);
 988                         free_page((unsigned long)kaweth->firmware_buf);
 989                         kfree(kaweth);
 990                         return -EIO;
 991                 }
 992
 993                 if ((result = kaweth_download_firmware(kaweth,
 994                                                       kaweth_trigger_code_fix,
 995                                                       len_kaweth_trigger_code_fix,
 996                                                       126,
 997                                                       3)) < 0) {
 998                         kaweth_err("Error downloading trigger code fix (%d)", result);
 999                         free_page((unsigned long)kaweth->firmware_buf);
1000                         kfree(kaweth);
1001                         return -EIO;
1002                 }
1003
1004
1005                 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
1006                         kaweth_err("Error triggering firmware (%d)", result);
1007                         free_page((unsigned long)kaweth->firmware_buf);
1008                         kfree(kaweth);
1009                         return -EIO;
1010                 }
1011
1012                 /* Device will now disappear for a moment...  */
1013                 kaweth_info("Firmware loaded.  I'll be back...");
1014                 free_page((unsigned long)kaweth->firmware_buf);
1015                 kfree(kaweth);
1016                 return -EIO;
1017         }
1018
1019         result = kaweth_read_configuration(kaweth);
1020
1021         if(result < 0) {
1022                 kaweth_err("Error reading configuration (%d), no net device created", result);
1023                 kfree(kaweth);
1024                 return -EIO;
1025         }
1026
1027         kaweth_info("Statistics collection: %x", kaweth->configuration.statistics_mask);
1028         kaweth_info("Multicast filter limit: %x", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
1029         kaweth_info("MTU: %d", le16_to_cpu(kaweth->configuration.segment_size));
1030         kaweth_info("Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
1031                  (int)kaweth->configuration.hw_addr[0],
1032                  (int)kaweth->configuration.hw_addr[1],
1033                  (int)kaweth->configuration.hw_addr[2],
1034                  (int)kaweth->configuration.hw_addr[3],
1035                  (int)kaweth->configuration.hw_addr[4],
1036                  (int)kaweth->configuration.hw_addr[5]);
1037
1038         if(!memcmp(&kaweth->configuration.hw_addr,
1039                    &bcast_addr,
1040                    sizeof(bcast_addr))) {
1041                 kaweth_err("Firmware not functioning properly, no net device created");
1042                 kfree(kaweth);
1043                 return -EIO;
1044         }
1045
1046         if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
1047                 kaweth_dbg("Error setting URB size");
1048                 goto err_no_netdev;
1049         }
1050
1051         if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
1052                 kaweth_err("Error setting SOFS wait");
1053                 goto err_no_netdev;
1054         }
1055
1056         result = kaweth_set_receive_filter(kaweth,
1057                                            KAWETH_PACKET_FILTER_DIRECTED |
1058                                            KAWETH_PACKET_FILTER_BROADCAST |
1059                                            KAWETH_PACKET_FILTER_MULTICAST);
1060
1061         if(result < 0) {
1062                 kaweth_err("Error setting receive filter");
1063                 kfree(kaweth);
1064                 return -EIO;
1065         }
1066
1067         kaweth_dbg("Initializing net device.");
1068
1069         if (!(netdev = alloc_etherdev(0))) {
1070                 kfree(kaweth);
1071                 return -ENOMEM;
1072         }
1073
1074         kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1075         if (!kaweth->tx_urb)
1076                 goto err_no_urb;
1077         kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1078         if (!kaweth->rx_urb)
1079                 goto err_only_tx;
1080         kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1081         if (!kaweth->irq_urb)
1082                 goto err_tx_and_rx;
1083
1084         kaweth->intbuffer = usb_buffer_alloc(   kaweth->dev,
1085                                                 INTBUFFERSIZE,
1086                                                 GFP_KERNEL,
1087                                                 &kaweth->intbufferhandle);
1088         if (!kaweth->intbuffer)
1089                 goto err_tx_and_rx_and_irq;
1090         kaweth->rx_buf = usb_buffer_alloc(      kaweth->dev,
1091                                                 KAWETH_BUF_SIZE,
1092                                                 GFP_KERNEL,
1093                                                 &kaweth->rxbufferhandle);
1094         if (!kaweth->rx_buf)
1095                 goto err_all_but_rxbuf;
1096
1097         kaweth->net = netdev;
1098         memcpy(kaweth->net->broadcast, &bcast_addr, sizeof(bcast_addr));
1099         memcpy(kaweth->net->dev_addr,
1100                &kaweth->configuration.hw_addr,
1101                sizeof(kaweth->configuration.hw_addr));
1102
1103         kaweth->net->priv = kaweth;
1104         kaweth->net->open = kaweth_open;
1105         kaweth->net->stop = kaweth_close;
1106
1107         kaweth->net->watchdog_timeo = KAWETH_TX_TIMEOUT;
1108         kaweth->net->tx_timeout = kaweth_tx_timeout;
1109
1110         kaweth->net->do_ioctl = kaweth_ioctl;
1111         kaweth->net->hard_start_xmit = kaweth_start_xmit;
1112         kaweth->net->set_multicast_list = kaweth_set_rx_mode;
1113         kaweth->net->get_stats = kaweth_netdev_stats;
1114         kaweth->net->mtu = le16_to_cpu(kaweth->configuration.segment_size);
1115
1116         memset(&kaweth->stats, 0, sizeof(kaweth->stats));
1117
1118         INIT_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl, (void *)kaweth);
1119
1120         SET_MODULE_OWNER(netdev);
1121
1122         usb_set_intfdata(intf, kaweth);
1123
1124 #if 0
1125 // dma_supported() is deeply broken on almost all architectures
1126         if (dma_supported (&intf->dev, 0xffffffffffffffffULL))
1127                 kaweth->net->features |= NETIF_F_HIGHDMA;
1128 #endif
1129
1130         SET_NETDEV_DEV(netdev, &intf->dev);
1131         if (register_netdev(netdev) != 0) {
1132                 kaweth_err("Error registering netdev.");
1133                 goto err_intfdata;
1134         }
1135
1136         kaweth_info("kaweth interface created at %s", kaweth->net->name);
1137
1138         kaweth_dbg("Kaweth probe returning.");
1139
1140         return 0;
1141
1142 err_intfdata:
1143         usb_set_intfdata(intf, NULL);
1144         usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1145 err_all_but_rxbuf:
1146         usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1147 err_tx_and_rx_and_irq:
1148         usb_free_urb(kaweth->irq_urb);
1149 err_tx_and_rx:
1150         usb_free_urb(kaweth->rx_urb);
1151 err_only_tx:
1152         usb_free_urb(kaweth->tx_urb);
1153 err_no_urb:
1154         free_netdev(netdev);
1155 err_no_netdev:
1156         kfree(kaweth);
1157         return -EIO;
1158 }
1159
1160 /****************************************************************
1161  *     kaweth_disconnect
1162  ****************************************************************/
1163 static void kaweth_disconnect(struct usb_interface *intf)
1164 {
1165         struct kaweth_device *kaweth = usb_get_intfdata(intf);
1166
1167         kaweth_info("Unregistering");
1168
1169         usb_set_intfdata(intf, NULL);
1170         if (!kaweth) {
1171                 kaweth_warn("unregistering non-existant device");
1172                 return;
1173         }
1174
1175         kaweth->removed = 1;
1176         usb_unlink_urb(kaweth->irq_urb);
1177         usb_unlink_urb(kaweth->rx_urb);
1178
1179         /* we need to wait for the urb to be cancelled, if it is active */
1180         spin_lock(&kaweth->device_lock);
1181         if (usb_unlink_urb(kaweth->tx_urb) == -EINPROGRESS) {
1182                 spin_unlock(&kaweth->device_lock);
1183                 wait_event(kaweth->term_wait, kaweth->end);
1184         } else {
1185                 spin_unlock(&kaweth->device_lock);
1186         }
1187
1188         if(kaweth->net) {
1189                 if(kaweth->net->flags & IFF_UP) {
1190                         kaweth_dbg("Closing net device");
1191                         dev_close(kaweth->net);
1192                 }
1193
1194                 kaweth_dbg("Unregistering net device");
1195                 unregister_netdev(kaweth->net);
1196                 free_netdev(kaweth->net);
1197         }
1198
1199         usb_free_urb(kaweth->rx_urb);
1200         usb_free_urb(kaweth->tx_urb);
1201         usb_free_urb(kaweth->irq_urb);
1202
1203
1204         usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1205         usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1206
1207         kfree(kaweth);
1208 }
1209
1210
1211 // FIXME this completion stuff is a modified clone of
1212 // an OLD version of some stuff in usb.c ...
1213 struct usb_api_data {
1214         wait_queue_head_t wqh;
1215         int done;
1216 };
1217
1218 /*-------------------------------------------------------------------*
1219  * completion handler for compatibility wrappers (sync control/bulk) *
1220  *-------------------------------------------------------------------*/
1221 static void usb_api_blocking_completion(struct urb *urb, struct pt_regs *regs)
1222 {
1223         struct usb_api_data *awd = (struct usb_api_data *)urb->context;
1224
1225         awd->done=1;
1226         wake_up(&awd->wqh);
1227 }
1228
1229 /*-------------------------------------------------------------------*
1230  *                         COMPATIBILITY STUFF                       *
1231  *-------------------------------------------------------------------*/
1232
1233 // Starts urb and waits for completion or timeout
1234 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
1235 {
1236         DECLARE_WAITQUEUE(wait, current);
1237         struct usb_api_data awd;
1238         int status;
1239
1240         init_waitqueue_head(&awd.wqh);
1241         awd.done = 0;
1242
1243         add_wait_queue(&awd.wqh, &wait);
1244         urb->context = &awd;
1245         status = usb_submit_urb(urb, GFP_NOIO);
1246         if (status) {
1247                 // something went wrong
1248                 usb_free_urb(urb);
1249                 remove_wait_queue(&awd.wqh, &wait);
1250                 return status;
1251         }
1252
1253         set_current_state(TASK_UNINTERRUPTIBLE);
1254         while (timeout && !awd.done) {
1255                 timeout = schedule_timeout(timeout);
1256                 set_current_state(TASK_UNINTERRUPTIBLE);
1257         }
1258
1259         set_current_state(TASK_RUNNING);
1260         remove_wait_queue(&awd.wqh, &wait);
1261
1262         if (!timeout) {
1263                 // timeout
1264                 kaweth_warn("usb_control/bulk_msg: timeout");
1265                 usb_unlink_urb(urb);  // remove urb safely
1266                 status = -ETIMEDOUT;
1267         }
1268         else {
1269                 status = urb->status;
1270         }
1271
1272         if (actual_length) {
1273                 *actual_length = urb->actual_length;
1274         }
1275
1276         usb_free_urb(urb);
1277         return status;
1278 }
1279
1280 /*-------------------------------------------------------------------*/
1281 // returns status (negative) or length (positive)
1282 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
1283                                        unsigned int pipe,
1284                                        struct usb_ctrlrequest *cmd, void *data,
1285                                        int len, int timeout)
1286 {
1287         struct urb *urb;
1288         int retv;
1289         int length;
1290
1291         urb = usb_alloc_urb(0, GFP_NOIO);
1292         if (!urb)
1293                 return -ENOMEM;
1294
1295         usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data,
1296                          len, usb_api_blocking_completion,0);
1297
1298         retv = usb_start_wait_urb(urb, timeout, &length);
1299         if (retv < 0) {
1300                 return retv;
1301         }
1302         else {
1303                 return length;
1304         }
1305 }
1306
1307
1308 /****************************************************************
1309  *     kaweth_init
1310  ****************************************************************/
1311 static int __init kaweth_init(void)
1312 {
1313         kaweth_dbg("Driver loading");
1314         return usb_register(&kaweth_driver);
1315 }
1316
1317 /****************************************************************
1318  *     kaweth_exit
1319  ****************************************************************/
1320 static void __exit kaweth_exit(void)
1321 {
1322         usb_deregister(&kaweth_driver);
1323 }
1324
1325 module_init(kaweth_init);
1326 module_exit(kaweth_exit);
1327
1328
1329
1330
1331
1332
1333
1334
1335