drivers/net/usb/kaweth.c

   1 /****************************************************************
   2  *
   3  *     kaweth.c - driver for KL5KUSB101 based USB->Ethernet
   4  *
   5  *     (c) 2000 Interlan Communications
   6  *     (c) 2000 Stephane Alnet
   7  *     (C) 2001 Brad Hards
   8  *     (C) 2002 Oliver Neukum
   9  *
  10  *     Original author: The Zapman <zapman@interlan.net>
  11  *     Inspired by, and much credit goes to Michael Rothwell
  12  *     <rothwell@interlan.net> for the test equipment, help, and patience
  13  *     Based off of (and with thanks to) Petko Manolov's pegaus.c driver.
  14  *     Also many thanks to Joel Silverman and Ed Surprenant at Kawasaki
  15  *     for providing the firmware and driver resources.
  16  *
  17  *     This program is free software; you can redistribute it and/or
  18  *     modify it under the terms of the GNU General Public License as
  19  *     published by the Free Software Foundation; either version 2, or
  20  *     (at your option) any later version.
  21  *
  22  *     This program is distributed in the hope that it will be useful,
  23  *     but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25  *     GNU General Public License for more details.
  26  *
  27  *     You should have received a copy of the GNU General Public License
  28  *     along with this program; if not, write to the Free Software Foundation,
  29  *     Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  30  *
  31  ****************************************************************/
  32
  33 /* TODO:
  34  * Fix in_interrupt() problem
  35  * Develop test procedures for USB net interfaces
  36  * Run test procedures
  37  * Fix bugs from previous two steps
  38  * Snoop other OSs for any tricks we're not doing
  39  * Reduce arbitrary timeouts
  40  * Smart multicast support
  41  * Temporary MAC change support
  42  * Tunable SOFs parameter - ioctl()?
  43  * Ethernet stats collection
  44  * Code formatting improvements
  45  */
  46
  47 #include <linux/module.h>
  48 #include <linux/slab.h>
  49 #include <linux/string.h>
  50 #include <linux/init.h>
  51 #include <linux/delay.h>
  52 #include <linux/netdevice.h>
  53 #include <linux/etherdevice.h>
  54 #include <linux/usb.h>
  55 #include <linux/types.h>
  56 #include <linux/ethtool.h>
  57 #include <linux/dma-mapping.h>
  58 #include <linux/wait.h>
  59 #include <linux/firmware.h>
  60 #include <asm/uaccess.h>
  61 #include <asm/byteorder.h>
  62
  63 #undef DEBUG
  64
  65 #define KAWETH_MTU                      1514
  66 #define KAWETH_BUF_SIZE                 1664
  67 #define KAWETH_TX_TIMEOUT               (5 * HZ)
  68 #define KAWETH_SCRATCH_SIZE             32
  69 #define KAWETH_FIRMWARE_BUF_SIZE        4096
  70 #define KAWETH_CONTROL_TIMEOUT          (30000)
  71
  72 #define KAWETH_STATUS_BROKEN            0x0000001
  73 #define KAWETH_STATUS_CLOSING           0x0000002
  74 #define KAWETH_STATUS_SUSPENDING        0x0000004
  75
  76 #define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING)
  77
  78 #define KAWETH_PACKET_FILTER_PROMISCUOUS        0x01
  79 #define KAWETH_PACKET_FILTER_ALL_MULTICAST      0x02
  80 #define KAWETH_PACKET_FILTER_DIRECTED           0x04
  81 #define KAWETH_PACKET_FILTER_BROADCAST          0x08
  82 #define KAWETH_PACKET_FILTER_MULTICAST          0x10
  83
  84 /* Table 7 */
  85 #define KAWETH_COMMAND_GET_ETHERNET_DESC        0x00
  86 #define KAWETH_COMMAND_MULTICAST_FILTERS        0x01
  87 #define KAWETH_COMMAND_SET_PACKET_FILTER        0x02
  88 #define KAWETH_COMMAND_STATISTICS               0x03
  89 #define KAWETH_COMMAND_SET_TEMP_MAC             0x06
  90 #define KAWETH_COMMAND_GET_TEMP_MAC             0x07
  91 #define KAWETH_COMMAND_SET_URB_SIZE             0x08
  92 #define KAWETH_COMMAND_SET_SOFS_WAIT            0x09
  93 #define KAWETH_COMMAND_SCAN                     0xFF
  94
  95 #define KAWETH_SOFS_TO_WAIT                     0x05
  96
  97 #define INTBUFFERSIZE                           4
  98
  99 #define STATE_OFFSET                            0
 100 #define STATE_MASK                              0x40
 101 #define STATE_SHIFT                             5
 102
 103 #define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED)
 104
 105
 106 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>");
 107 MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver");
 108 MODULE_LICENSE("GPL");
 109 MODULE_FIRMWARE("kaweth/new_code.bin");
 110 MODULE_FIRMWARE("kaweth/new_code_fix.bin");
 111 MODULE_FIRMWARE("kaweth/trigger_code.bin");
 112 MODULE_FIRMWARE("kaweth/trigger_code_fix.bin");
 113
 114 static const char driver_name[] = "kaweth";
 115
 116 static int kaweth_probe(
 117                 struct usb_interface *intf,
 118                 const struct usb_device_id *id  /* from id_table */
 119         );
 120 static void kaweth_disconnect(struct usb_interface *intf);
 121 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
 122                                        unsigned int pipe,
 123                                        struct usb_ctrlrequest *cmd, void *data,
 124                                        int len, int timeout);
 125 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message);
 126 static int kaweth_resume(struct usb_interface *intf);
 127
 128 /****************************************************************
 129  *     usb_device_id
 130  ****************************************************************/
 131 static struct usb_device_id usb_klsi_table[] = {
 132         { USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */
 133         { USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */
 134         { USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */
 135         { USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */
 136         { USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */
 137         { USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */
 138         { USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */
 139         { USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */
 140         { USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */
 141         { USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */
 142         { USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */
 143         { USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */
 144         { USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */
 145         { USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */
 146         { USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */
 147         { USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */
 148         { USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */
 149         { USB_DEVICE(0x0846, 0x1001) }, /* NetGear EA-101 */
 150         { USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */
 151         { USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */
 152         { USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */
 153         { USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */
 154         { USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */
 155         { USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */
 156         { USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */
 157         { USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */
 158         { USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */
 159         { USB_DEVICE(0x1485, 0x0001) }, /* Silicom U2E */
 160         { USB_DEVICE(0x1485, 0x0002) }, /* Psion Dacom Gold Port Ethernet */
 161         { USB_DEVICE(0x1645, 0x0005) }, /* Entrega E45 */
 162         { USB_DEVICE(0x1645, 0x0008) }, /* Entrega USB Ethernet Adapter */
 163         { USB_DEVICE(0x1645, 0x8005) }, /* PortGear Ethernet Adapter */
 164         { USB_DEVICE(0x1668, 0x0323) }, /* Actiontec USB Ethernet */
 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         .name =         driver_name,
 176         .probe =        kaweth_probe,
 177         .disconnect =   kaweth_disconnect,
 178         .suspend =      kaweth_suspend,
 179         .resume =       kaweth_resume,
 180         .id_table =     usb_klsi_table,
 181         .supports_autosuspend = 1,
 182 };
 183
 184 typedef __u8 eth_addr_t[6];
 185
 186 /****************************************************************
 187  *     usb_eth_dev
 188  ****************************************************************/
 189 struct usb_eth_dev {
 190         char *name;
 191         __u16 vendor;
 192         __u16 device;
 193         void *pdata;
 194 };
 195
 196 /****************************************************************
 197  *     kaweth_ethernet_configuration
 198  *     Refer Table 8
 199  ****************************************************************/
 200 struct kaweth_ethernet_configuration
 201 {
 202         __u8 size;
 203         __u8 reserved1;
 204         __u8 reserved2;
 205         eth_addr_t hw_addr;
 206         __u32 statistics_mask;
 207         __le16 segment_size;
 208         __u16 max_multicast_filters;
 209         __u8 reserved3;
 210 } __attribute__ ((packed));
 211
 212 /****************************************************************
 213  *     kaweth_device
 214  ****************************************************************/
 215 struct kaweth_device
 216 {
 217         spinlock_t device_lock;
 218
 219         __u32 status;
 220         int end;
 221         int suspend_lowmem_rx;
 222         int suspend_lowmem_ctrl;
 223         int linkstate;
 224         int opened;
 225         struct delayed_work lowmem_work;
 226
 227         struct usb_device *dev;
 228         struct usb_interface *intf;
 229         struct net_device *net;
 230         wait_queue_head_t term_wait;
 231
 232         struct urb *rx_urb;
 233         struct urb *tx_urb;
 234         struct urb *irq_urb;
 235
 236         dma_addr_t intbufferhandle;
 237         __u8 *intbuffer;
 238         dma_addr_t rxbufferhandle;
 239         __u8 *rx_buf;
 240
 241
 242         struct sk_buff *tx_skb;
 243
 244         __u8 *firmware_buf;
 245         __u8 scratch[KAWETH_SCRATCH_SIZE];
 246         __u16 packet_filter_bitmap;
 247
 248         struct kaweth_ethernet_configuration configuration;
 249
 250         struct net_device_stats stats;
 251 };
 252
 253 /****************************************************************
 254  *     kaweth_control
 255  ****************************************************************/
 256 static int kaweth_control(struct kaweth_device *kaweth,
 257                           unsigned int pipe,
 258                           __u8 request,
 259                           __u8 requesttype,
 260                           __u16 value,
 261                           __u16 index,
 262                           void *data,
 263                           __u16 size,
 264                           int timeout)
 265 {
 266         struct usb_ctrlrequest *dr;
 267
 268         dbg("kaweth_control()");
 269
 270         if(in_interrupt()) {
 271                 dbg("in_interrupt()");
 272                 return -EBUSY;
 273         }
 274
 275         dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
 276
 277         if (!dr) {
 278                 dbg("kmalloc() failed");
 279                 return -ENOMEM;
 280         }
 281
 282         dr->bRequestType= requesttype;
 283         dr->bRequest = request;
 284         dr->wValue = cpu_to_le16(value);
 285         dr->wIndex = cpu_to_le16(index);
 286         dr->wLength = cpu_to_le16(size);
 287
 288         return kaweth_internal_control_msg(kaweth->dev,
 289                                         pipe,
 290                                         dr,
 291                                         data,
 292                                         size,
 293                                         timeout);
 294 }
 295
 296 /****************************************************************
 297  *     kaweth_read_configuration
 298  ****************************************************************/
 299 static int kaweth_read_configuration(struct kaweth_device *kaweth)
 300 {
 301         int retval;
 302
 303         dbg("Reading kaweth configuration");
 304
 305         retval = kaweth_control(kaweth,
 306                                 usb_rcvctrlpipe(kaweth->dev, 0),
 307                                 KAWETH_COMMAND_GET_ETHERNET_DESC,
 308                                 USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE,
 309                                 0,
 310                                 0,
 311                                 (void *)&kaweth->configuration,
 312                                 sizeof(kaweth->configuration),
 313                                 KAWETH_CONTROL_TIMEOUT);
 314
 315         return retval;
 316 }
 317
 318 /****************************************************************
 319  *     kaweth_set_urb_size
 320  ****************************************************************/
 321 static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size)
 322 {
 323         int retval;
 324
 325         dbg("Setting URB size to %d", (unsigned)urb_size);
 326
 327         retval = kaweth_control(kaweth,
 328                                 usb_sndctrlpipe(kaweth->dev, 0),
 329                                 KAWETH_COMMAND_SET_URB_SIZE,
 330                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 331                                 urb_size,
 332                                 0,
 333                                 (void *)&kaweth->scratch,
 334                                 0,
 335                                 KAWETH_CONTROL_TIMEOUT);
 336
 337         return retval;
 338 }
 339
 340 /****************************************************************
 341  *     kaweth_set_sofs_wait
 342  ****************************************************************/
 343 static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait)
 344 {
 345         int retval;
 346
 347         dbg("Set SOFS wait to %d", (unsigned)sofs_wait);
 348
 349         retval = kaweth_control(kaweth,
 350                                 usb_sndctrlpipe(kaweth->dev, 0),
 351                                 KAWETH_COMMAND_SET_SOFS_WAIT,
 352                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 353                                 sofs_wait,
 354                                 0,
 355                                 (void *)&kaweth->scratch,
 356                                 0,
 357                                 KAWETH_CONTROL_TIMEOUT);
 358
 359         return retval;
 360 }
 361
 362 /****************************************************************
 363  *     kaweth_set_receive_filter
 364  ****************************************************************/
 365 static int kaweth_set_receive_filter(struct kaweth_device *kaweth,
 366                                      __u16 receive_filter)
 367 {
 368         int retval;
 369
 370         dbg("Set receive filter to %d", (unsigned)receive_filter);
 371
 372         retval = kaweth_control(kaweth,
 373                                 usb_sndctrlpipe(kaweth->dev, 0),
 374                                 KAWETH_COMMAND_SET_PACKET_FILTER,
 375                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 376                                 receive_filter,
 377                                 0,
 378                                 (void *)&kaweth->scratch,
 379                                 0,
 380                                 KAWETH_CONTROL_TIMEOUT);
 381
 382         return retval;
 383 }
 384
 385 /****************************************************************
 386  *     kaweth_download_firmware
 387  ****************************************************************/
 388 static int kaweth_download_firmware(struct kaweth_device *kaweth,
 389                                     const char *fwname,
 390                                     __u8 interrupt,
 391                                     __u8 type)
 392 {
 393         const struct firmware *fw;
 394         int data_len;
 395         int ret;
 396
 397         ret = request_firmware(&fw, fwname, &kaweth->dev->dev);
 398         if (ret) {
 399                 err("Firmware request failed\n");
 400                 return ret;
 401         }
 402
 403         if (fw->size > KAWETH_FIRMWARE_BUF_SIZE) {
 404                 err("Firmware too big: %zu", fw->size);
 405                 return -ENOSPC;
 406         }
 407         data_len = fw->size;
 408         memcpy(kaweth->firmware_buf, fw->data, fw->size);
 409
 410         release_firmware(fw);
 411
 412         kaweth->firmware_buf[2] = (data_len & 0xFF) - 7;
 413         kaweth->firmware_buf[3] = data_len >> 8;
 414         kaweth->firmware_buf[4] = type;
 415         kaweth->firmware_buf[5] = interrupt;
 416
 417         dbg("High: %i, Low:%i", kaweth->firmware_buf[3],
 418                    kaweth->firmware_buf[2]);
 419
 420         dbg("Downloading firmware at %p to kaweth device at %p",
 421             fw->data, kaweth);
 422         dbg("Firmware length: %d", data_len);
 423
 424         return kaweth_control(kaweth,
 425                               usb_sndctrlpipe(kaweth->dev, 0),
 426                               KAWETH_COMMAND_SCAN,
 427                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 428                               0,
 429                               0,
 430                               (void *)kaweth->firmware_buf,
 431                               data_len,
 432                               KAWETH_CONTROL_TIMEOUT);
 433 }
 434
 435 /****************************************************************
 436  *     kaweth_trigger_firmware
 437  ****************************************************************/
 438 static int kaweth_trigger_firmware(struct kaweth_device *kaweth,
 439                                    __u8 interrupt)
 440 {
 441         kaweth->firmware_buf[0] = 0xB6;
 442         kaweth->firmware_buf[1] = 0xC3;
 443         kaweth->firmware_buf[2] = 0x01;
 444         kaweth->firmware_buf[3] = 0x00;
 445         kaweth->firmware_buf[4] = 0x06;
 446         kaweth->firmware_buf[5] = interrupt;
 447         kaweth->firmware_buf[6] = 0x00;
 448         kaweth->firmware_buf[7] = 0x00;
 449
 450         dbg("Triggering firmware");
 451
 452         return kaweth_control(kaweth,
 453                               usb_sndctrlpipe(kaweth->dev, 0),
 454                               KAWETH_COMMAND_SCAN,
 455                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 456                               0,
 457                               0,
 458                               (void *)kaweth->firmware_buf,
 459                               8,
 460                               KAWETH_CONTROL_TIMEOUT);
 461 }
 462
 463 /****************************************************************
 464  *     kaweth_reset
 465  ****************************************************************/
 466 static int kaweth_reset(struct kaweth_device *kaweth)
 467 {
 468         int result;
 469
 470         dbg("kaweth_reset(%p)", kaweth);
 471         result = kaweth_control(kaweth,
 472                                 usb_sndctrlpipe(kaweth->dev, 0),
 473                                 USB_REQ_SET_CONFIGURATION,
 474                                 0,
 475                                 kaweth->dev->config[0].desc.bConfigurationValue,
 476                                 0,
 477                                 NULL,
 478                                 0,
 479                                 KAWETH_CONTROL_TIMEOUT);
 480
 481         mdelay(10);
 482
 483         dbg("kaweth_reset() returns %d.",result);
 484
 485         return result;
 486 }
 487
 488 static void kaweth_usb_receive(struct urb *);
 489 static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t);
 490
 491 /****************************************************************
 492         int_callback
 493 *****************************************************************/
 494
 495 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf)
 496 {
 497         int status;
 498
 499         status = usb_submit_urb (kaweth->irq_urb, mf);
 500         if (unlikely(status == -ENOMEM)) {
 501                 kaweth->suspend_lowmem_ctrl = 1;
 502                 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
 503         } else {
 504                 kaweth->suspend_lowmem_ctrl = 0;
 505         }
 506
 507         if (status)
 508                 err ("can't resubmit intr, %s-%s, status %d",
 509                                 kaweth->dev->bus->bus_name,
 510                                 kaweth->dev->devpath, status);
 511 }
 512
 513 static void int_callback(struct urb *u)
 514 {
 515         struct kaweth_device *kaweth = u->context;
 516         int act_state;
 517         int status = u->status;
 518
 519         switch (status) {
 520         case 0:                 /* success */
 521                 break;
 522         case -ECONNRESET:       /* unlink */
 523         case -ENOENT:
 524         case -ESHUTDOWN:
 525                 return;
 526         /* -EPIPE:  should clear the halt */
 527         default:                /* error */
 528                 goto resubmit;
 529         }
 530
 531         /* we check the link state to report changes */
 532         if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) {
 533                 if (act_state)
 534                         netif_carrier_on(kaweth->net);
 535                 else
 536                         netif_carrier_off(kaweth->net);
 537
 538                 kaweth->linkstate = act_state;
 539         }
 540 resubmit:
 541         kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC);
 542 }
 543
 544 static void kaweth_resubmit_tl(struct work_struct *work)
 545 {
 546         struct kaweth_device *kaweth =
 547                 container_of(work, struct kaweth_device, lowmem_work.work);
 548
 549         if (IS_BLOCKED(kaweth->status))
 550                 return;
 551
 552         if (kaweth->suspend_lowmem_rx)
 553                 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
 554
 555         if (kaweth->suspend_lowmem_ctrl)
 556                 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
 557 }
 558
 559
 560 /****************************************************************
 561  *     kaweth_resubmit_rx_urb
 562  ****************************************************************/
 563 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth,
 564                                                 gfp_t mem_flags)
 565 {
 566         int result;
 567
 568         usb_fill_bulk_urb(kaweth->rx_urb,
 569                       kaweth->dev,
 570                       usb_rcvbulkpipe(kaweth->dev, 1),
 571                       kaweth->rx_buf,
 572                       KAWETH_BUF_SIZE,
 573                       kaweth_usb_receive,
 574                       kaweth);
 575         kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 576         kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle;
 577
 578         if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) {
 579                 if (result == -ENOMEM) {
 580                         kaweth->suspend_lowmem_rx = 1;
 581                         schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
 582                 }
 583                 err("resubmitting rx_urb %d failed", result);
 584         } else {
 585                 kaweth->suspend_lowmem_rx = 0;
 586         }
 587
 588         return result;
 589 }
 590
 591 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth);
 592
 593 /****************************************************************
 594  *     kaweth_usb_receive
 595  ****************************************************************/
 596 static void kaweth_usb_receive(struct urb *urb)
 597 {
 598         struct kaweth_device *kaweth = urb->context;
 599         struct net_device *net = kaweth->net;
 600         int status = urb->status;
 601
 602         int count = urb->actual_length;
 603         int count2 = urb->transfer_buffer_length;
 604
 605         __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf);
 606
 607         struct sk_buff *skb;
 608
 609         if(unlikely(status == -ECONNRESET || status == -ESHUTDOWN))
 610         /* we are killed - set a flag and wake the disconnect handler */
 611         {
 612                 kaweth->end = 1;
 613                 wake_up(&kaweth->term_wait);
 614                 return;
 615         }
 616
 617         spin_lock(&kaweth->device_lock);
 618         if (IS_BLOCKED(kaweth->status)) {
 619                 spin_unlock(&kaweth->device_lock);
 620                 return;
 621         }
 622         spin_unlock(&kaweth->device_lock);
 623
 624         if(status && status != -EREMOTEIO && count != 1) {
 625                 err("%s RX status: %d count: %d packet_len: %d",
 626                            net->name,
 627                            status,
 628                            count,
 629                            (int)pkt_len);
 630                 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 631                 return;
 632         }
 633
 634         if(kaweth->net && (count > 2)) {
 635                 if(pkt_len > (count - 2)) {
 636                         err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count);
 637                         err("Packet len & 2047: %x", pkt_len & 2047);
 638                         err("Count 2: %x", count2);
 639                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 640                         return;
 641                 }
 642
 643                 if(!(skb = dev_alloc_skb(pkt_len+2))) {
 644                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 645                         return;
 646                 }
 647
 648                 skb_reserve(skb, 2);    /* Align IP on 16 byte boundaries */
 649
 650                 skb_copy_to_linear_data(skb, kaweth->rx_buf + 2, pkt_len);
 651
 652                 skb_put(skb, pkt_len);
 653
 654                 skb->protocol = eth_type_trans(skb, net);
 655
 656                 netif_rx(skb);
 657
 658                 kaweth->stats.rx_packets++;
 659                 kaweth->stats.rx_bytes += pkt_len;
 660         }
 661
 662         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 663 }
 664
 665 /****************************************************************
 666  *     kaweth_open
 667  ****************************************************************/
 668 static int kaweth_open(struct net_device *net)
 669 {
 670         struct kaweth_device *kaweth = netdev_priv(net);
 671         int res;
 672
 673         dbg("Opening network device.");
 674
 675         res = usb_autopm_get_interface(kaweth->intf);
 676         if (res) {
 677                 err("Interface cannot be resumed.");
 678                 return -EIO;
 679         }
 680         res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL);
 681         if (res)
 682                 goto err_out;
 683
 684         usb_fill_int_urb(
 685                 kaweth->irq_urb,
 686                 kaweth->dev,
 687                 usb_rcvintpipe(kaweth->dev, 3),
 688                 kaweth->intbuffer,
 689                 INTBUFFERSIZE,
 690                 int_callback,
 691                 kaweth,
 692                 250); /* overriding the descriptor */
 693         kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle;
 694         kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 695
 696         res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL);
 697         if (res) {
 698                 usb_kill_urb(kaweth->rx_urb);
 699                 goto err_out;
 700         }
 701         kaweth->opened = 1;
 702
 703         netif_start_queue(net);
 704
 705         kaweth_async_set_rx_mode(kaweth);
 706         return 0;
 707
 708 err_out:
 709         usb_autopm_enable(kaweth->intf);
 710         return -EIO;
 711 }
 712
 713 /****************************************************************
 714  *     kaweth_kill_urbs
 715  ****************************************************************/
 716 static void kaweth_kill_urbs(struct kaweth_device *kaweth)
 717 {
 718         usb_kill_urb(kaweth->irq_urb);
 719         usb_kill_urb(kaweth->rx_urb);
 720         usb_kill_urb(kaweth->tx_urb);
 721
 722         cancel_delayed_work_sync(&kaweth->lowmem_work);
 723
 724         /* a scheduled work may have resubmitted,
 725            we hit them again */
 726         usb_kill_urb(kaweth->irq_urb);
 727         usb_kill_urb(kaweth->rx_urb);
 728 }
 729
 730 /****************************************************************
 731  *     kaweth_close
 732  ****************************************************************/
 733 static int kaweth_close(struct net_device *net)
 734 {
 735         struct kaweth_device *kaweth = netdev_priv(net);
 736
 737         netif_stop_queue(net);
 738         kaweth->opened = 0;
 739
 740         kaweth->status |= KAWETH_STATUS_CLOSING;
 741
 742         kaweth_kill_urbs(kaweth);
 743
 744         kaweth->status &= ~KAWETH_STATUS_CLOSING;
 745
 746         usb_autopm_enable(kaweth->intf);
 747
 748         return 0;
 749 }
 750
 751 static void kaweth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
 752 {
 753         struct kaweth_device *kaweth = netdev_priv(dev);
 754
 755         strlcpy(info->driver, driver_name, sizeof(info->driver));
 756         usb_make_path(kaweth->dev, info->bus_info, sizeof (info->bus_info));
 757 }
 758
 759 static u32 kaweth_get_link(struct net_device *dev)
 760 {
 761         struct kaweth_device *kaweth = netdev_priv(dev);
 762
 763         return kaweth->linkstate;
 764 }
 765
 766 static struct ethtool_ops ops = {
 767         .get_drvinfo    = kaweth_get_drvinfo,
 768         .get_link       = kaweth_get_link
 769 };
 770
 771 /****************************************************************
 772  *     kaweth_usb_transmit_complete
 773  ****************************************************************/
 774 static void kaweth_usb_transmit_complete(struct urb *urb)
 775 {
 776         struct kaweth_device *kaweth = urb->context;
 777         struct sk_buff *skb = kaweth->tx_skb;
 778         int status = urb->status;
 779
 780         if (unlikely(status != 0))
 781                 if (status != -ENOENT)
 782                         dbg("%s: TX status %d.", kaweth->net->name, status);
 783
 784         netif_wake_queue(kaweth->net);
 785         dev_kfree_skb_irq(skb);
 786 }
 787
 788 /****************************************************************
 789  *     kaweth_start_xmit
 790  ****************************************************************/
 791 static int kaweth_start_xmit(struct sk_buff *skb, struct net_device *net)
 792 {
 793         struct kaweth_device *kaweth = netdev_priv(net);
 794         __le16 *private_header;
 795
 796         int res;
 797
 798         spin_lock_irq(&kaweth->device_lock);
 799
 800         kaweth_async_set_rx_mode(kaweth);
 801         netif_stop_queue(net);
 802         if (IS_BLOCKED(kaweth->status)) {
 803                 goto skip;
 804         }
 805
 806         /* We now decide whether we can put our special header into the sk_buff */
 807         if (skb_cloned(skb) || skb_headroom(skb) < 2) {
 808                 /* no such luck - we make our own */
 809                 struct sk_buff *copied_skb;
 810                 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC);
 811                 dev_kfree_skb_irq(skb);
 812                 skb = copied_skb;
 813                 if (!copied_skb) {
 814                         kaweth->stats.tx_errors++;
 815                         netif_start_queue(net);
 816                         spin_unlock_irq(&kaweth->device_lock);
 817                         return 0;
 818                 }
 819         }
 820
 821         private_header = (__le16 *)__skb_push(skb, 2);
 822         *private_header = cpu_to_le16(skb->len-2);
 823         kaweth->tx_skb = skb;
 824
 825         usb_fill_bulk_urb(kaweth->tx_urb,
 826                       kaweth->dev,
 827                       usb_sndbulkpipe(kaweth->dev, 2),
 828                       private_header,
 829                       skb->len,
 830                       kaweth_usb_transmit_complete,
 831                       kaweth);
 832         kaweth->end = 0;
 833
 834         if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
 835         {
 836                 dev_warn(&net->dev, "kaweth failed tx_urb %d\n", res);
 837 skip:
 838                 kaweth->stats.tx_errors++;
 839
 840                 netif_start_queue(net);
 841                 dev_kfree_skb_irq(skb);
 842         }
 843         else
 844         {
 845                 kaweth->stats.tx_packets++;
 846                 kaweth->stats.tx_bytes += skb->len;
 847                 net->trans_start = jiffies;
 848         }
 849
 850         spin_unlock_irq(&kaweth->device_lock);
 851
 852         return 0;
 853 }
 854
 855 /****************************************************************
 856  *     kaweth_set_rx_mode
 857  ****************************************************************/
 858 static void kaweth_set_rx_mode(struct net_device *net)
 859 {
 860         struct kaweth_device *kaweth = netdev_priv(net);
 861
 862         __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
 863                                      KAWETH_PACKET_FILTER_BROADCAST |
 864                                      KAWETH_PACKET_FILTER_MULTICAST;
 865
 866         dbg("Setting Rx mode to %d", packet_filter_bitmap);
 867
 868         netif_stop_queue(net);
 869
 870         if (net->flags & IFF_PROMISC) {
 871                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
 872         }
 873         else if ((net->mc_count) || (net->flags & IFF_ALLMULTI)) {
 874                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
 875         }
 876
 877         kaweth->packet_filter_bitmap = packet_filter_bitmap;
 878         netif_wake_queue(net);
 879 }
 880
 881 /****************************************************************
 882  *     kaweth_async_set_rx_mode
 883  ****************************************************************/
 884 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
 885 {
 886         __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
 887         kaweth->packet_filter_bitmap = 0;
 888         if (packet_filter_bitmap == 0)
 889                 return;
 890
 891         {
 892         int result;
 893         result = kaweth_control(kaweth,
 894                                 usb_sndctrlpipe(kaweth->dev, 0),
 895                                 KAWETH_COMMAND_SET_PACKET_FILTER,
 896                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 897                                 packet_filter_bitmap,
 898                                 0,
 899                                 (void *)&kaweth->scratch,
 900                                 0,
 901                                 KAWETH_CONTROL_TIMEOUT);
 902
 903         if(result < 0) {
 904                 err("Failed to set Rx mode: %d", result);
 905         }
 906         else {
 907                 dbg("Set Rx mode to %d", packet_filter_bitmap);
 908         }
 909         }
 910 }
 911
 912 /****************************************************************
 913  *     kaweth_netdev_stats
 914  ****************************************************************/
 915 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev)
 916 {
 917         struct kaweth_device *kaweth = netdev_priv(dev);
 918         return &kaweth->stats;
 919 }
 920
 921 /****************************************************************
 922  *     kaweth_tx_timeout
 923  ****************************************************************/
 924 static void kaweth_tx_timeout(struct net_device *net)
 925 {
 926         struct kaweth_device *kaweth = netdev_priv(net);
 927
 928         dev_warn(&net->dev, "%s: Tx timed out. Resetting.\n", net->name);
 929         kaweth->stats.tx_errors++;
 930         net->trans_start = jiffies;
 931
 932         usb_unlink_urb(kaweth->tx_urb);
 933 }
 934
 935 /****************************************************************
 936  *     kaweth_suspend
 937  ****************************************************************/
 938 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message)
 939 {
 940         struct kaweth_device *kaweth = usb_get_intfdata(intf);
 941         unsigned long flags;
 942
 943         dbg("Suspending device");
 944         spin_lock_irqsave(&kaweth->device_lock, flags);
 945         kaweth->status |= KAWETH_STATUS_SUSPENDING;
 946         spin_unlock_irqrestore(&kaweth->device_lock, flags);
 947
 948         kaweth_kill_urbs(kaweth);
 949         return 0;
 950 }
 951
 952 /****************************************************************
 953  *     kaweth_resume
 954  ****************************************************************/
 955 static int kaweth_resume(struct usb_interface *intf)
 956 {
 957         struct kaweth_device *kaweth = usb_get_intfdata(intf);
 958         unsigned long flags;
 959
 960         dbg("Resuming device");
 961         spin_lock_irqsave(&kaweth->device_lock, flags);
 962         kaweth->status &= ~KAWETH_STATUS_SUSPENDING;
 963         spin_unlock_irqrestore(&kaweth->device_lock, flags);
 964
 965         if (!kaweth->opened)
 966                 return 0;
 967         kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
 968         kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
 969
 970         return 0;
 971 }
 972
 973 /****************************************************************
 974  *     kaweth_probe
 975  ****************************************************************/
 976
 977
 978 static const struct net_device_ops kaweth_netdev_ops = {
 979         .ndo_open =                     kaweth_open,
 980         .ndo_stop =                     kaweth_close,
 981         .ndo_start_xmit =               kaweth_start_xmit,
 982         .ndo_tx_timeout =               kaweth_tx_timeout,
 983         .ndo_set_multicast_list =       kaweth_set_rx_mode,
 984         .ndo_get_stats =                kaweth_netdev_stats,
 985 };
 986
 987 static int kaweth_probe(
 988                 struct usb_interface *intf,
 989                 const struct usb_device_id *id      /* from id_table */
 990         )
 991 {
 992         struct usb_device *dev = interface_to_usbdev(intf);
 993         struct kaweth_device *kaweth;
 994         struct net_device *netdev;
 995         const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 996         int result = 0;
 997
 998         dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x",
 999                  dev->devnum,
1000                  le16_to_cpu(dev->descriptor.idVendor),
1001                  le16_to_cpu(dev->descriptor.idProduct),
1002                  le16_to_cpu(dev->descriptor.bcdDevice));
1003
1004         dbg("Device at %p", dev);
1005
1006         dbg("Descriptor length: %x type: %x",
1007                  (int)dev->descriptor.bLength,
1008                  (int)dev->descriptor.bDescriptorType);
1009
1010         netdev = alloc_etherdev(sizeof(*kaweth));
1011         if (!netdev)
1012                 return -ENOMEM;
1013
1014         kaweth = netdev_priv(netdev);
1015         kaweth->dev = dev;
1016         kaweth->net = netdev;
1017
1018         spin_lock_init(&kaweth->device_lock);
1019         init_waitqueue_head(&kaweth->term_wait);
1020
1021         dbg("Resetting.");
1022
1023         kaweth_reset(kaweth);
1024
1025         /*
1026          * If high byte of bcdDevice is nonzero, firmware is already
1027          * downloaded. Don't try to do it again, or we'll hang the device.
1028          */
1029
1030         if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) {
1031                 dev_info(&intf->dev, "Firmware present in device.\n");
1032         } else {
1033                 /* Download the firmware */
1034                 dev_info(&intf->dev, "Downloading firmware...\n");
1035                 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
1036                 if ((result = kaweth_download_firmware(kaweth,
1037                                                       "kaweth/new_code.bin",
1038                                                       100,
1039                                                       2)) < 0) {
1040                         err("Error downloading firmware (%d)", result);
1041                         goto err_fw;
1042                 }
1043
1044                 if ((result = kaweth_download_firmware(kaweth,
1045                                                       "kaweth/new_code_fix.bin",
1046                                                       100,
1047                                                       3)) < 0) {
1048                         err("Error downloading firmware fix (%d)", result);
1049                         goto err_fw;
1050                 }
1051
1052                 if ((result = kaweth_download_firmware(kaweth,
1053                                                       "kaweth/trigger_code.bin",
1054                                                       126,
1055                                                       2)) < 0) {
1056                         err("Error downloading trigger code (%d)", result);
1057                         goto err_fw;
1058
1059                 }
1060
1061                 if ((result = kaweth_download_firmware(kaweth,
1062                                                       "kaweth/trigger_code_fix.bin",
1063                                                       126,
1064                                                       3)) < 0) {
1065                         err("Error downloading trigger code fix (%d)", result);
1066                         goto err_fw;
1067                 }
1068
1069
1070                 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
1071                         err("Error triggering firmware (%d)", result);
1072                         goto err_fw;
1073                 }
1074
1075                 /* Device will now disappear for a moment...  */
1076                 dev_info(&intf->dev, "Firmware loaded.  I'll be back...\n");
1077 err_fw:
1078                 free_page((unsigned long)kaweth->firmware_buf);
1079                 free_netdev(netdev);
1080                 return -EIO;
1081         }
1082
1083         result = kaweth_read_configuration(kaweth);
1084
1085         if(result < 0) {
1086                 err("Error reading configuration (%d), no net device created", result);
1087                 goto err_free_netdev;
1088         }
1089
1090         dev_info(&intf->dev, "Statistics collection: %x\n", kaweth->configuration.statistics_mask);
1091         dev_info(&intf->dev, "Multicast filter limit: %x\n", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
1092         dev_info(&intf->dev, "MTU: %d\n", le16_to_cpu(kaweth->configuration.segment_size));
1093         dev_info(&intf->dev, "Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x\n",
1094                  (int)kaweth->configuration.hw_addr[0],
1095                  (int)kaweth->configuration.hw_addr[1],
1096                  (int)kaweth->configuration.hw_addr[2],
1097                  (int)kaweth->configuration.hw_addr[3],
1098                  (int)kaweth->configuration.hw_addr[4],
1099                  (int)kaweth->configuration.hw_addr[5]);
1100
1101         if(!memcmp(&kaweth->configuration.hw_addr,
1102                    &bcast_addr,
1103                    sizeof(bcast_addr))) {
1104                 err("Firmware not functioning properly, no net device created");
1105                 goto err_free_netdev;
1106         }
1107
1108         if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
1109                 dbg("Error setting URB size");
1110                 goto err_free_netdev;
1111         }
1112
1113         if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
1114                 err("Error setting SOFS wait");
1115                 goto err_free_netdev;
1116         }
1117
1118         result = kaweth_set_receive_filter(kaweth,
1119                                            KAWETH_PACKET_FILTER_DIRECTED |
1120                                            KAWETH_PACKET_FILTER_BROADCAST |
1121                                            KAWETH_PACKET_FILTER_MULTICAST);
1122
1123         if(result < 0) {
1124                 err("Error setting receive filter");
1125                 goto err_free_netdev;
1126         }
1127
1128         dbg("Initializing net device.");
1129
1130         kaweth->intf = intf;
1131
1132         kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1133         if (!kaweth->tx_urb)
1134                 goto err_free_netdev;
1135         kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1136         if (!kaweth->rx_urb)
1137                 goto err_only_tx;
1138         kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1139         if (!kaweth->irq_urb)
1140                 goto err_tx_and_rx;
1141
1142         kaweth->intbuffer = usb_buffer_alloc(   kaweth->dev,
1143                                                 INTBUFFERSIZE,
1144                                                 GFP_KERNEL,
1145                                                 &kaweth->intbufferhandle);
1146         if (!kaweth->intbuffer)
1147                 goto err_tx_and_rx_and_irq;
1148         kaweth->rx_buf = usb_buffer_alloc(      kaweth->dev,
1149                                                 KAWETH_BUF_SIZE,
1150                                                 GFP_KERNEL,
1151                                                 &kaweth->rxbufferhandle);
1152         if (!kaweth->rx_buf)
1153                 goto err_all_but_rxbuf;
1154
1155         memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr));
1156         memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr,
1157                sizeof(kaweth->configuration.hw_addr));
1158
1159         netdev->netdev_ops = &kaweth_netdev_ops;
1160         netdev->watchdog_timeo = KAWETH_TX_TIMEOUT;
1161         netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size);
1162         SET_ETHTOOL_OPS(netdev, &ops);
1163
1164         /* kaweth is zeroed as part of alloc_netdev */
1165         INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl);
1166         usb_set_intfdata(intf, kaweth);
1167
1168 #if 0
1169 // dma_supported() is deeply broken on almost all architectures
1170         if (dma_supported (&intf->dev, 0xffffffffffffffffULL))
1171                 kaweth->net->features |= NETIF_F_HIGHDMA;
1172 #endif
1173
1174         SET_NETDEV_DEV(netdev, &intf->dev);
1175         if (register_netdev(netdev) != 0) {
1176                 err("Error registering netdev.");
1177                 goto err_intfdata;
1178         }
1179
1180         dev_info(&intf->dev, "kaweth interface created at %s\n",
1181                  kaweth->net->name);
1182
1183         dbg("Kaweth probe returning.");
1184
1185         return 0;
1186
1187 err_intfdata:
1188         usb_set_intfdata(intf, NULL);
1189         usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1190 err_all_but_rxbuf:
1191         usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1192 err_tx_and_rx_and_irq:
1193         usb_free_urb(kaweth->irq_urb);
1194 err_tx_and_rx:
1195         usb_free_urb(kaweth->rx_urb);
1196 err_only_tx:
1197         usb_free_urb(kaweth->tx_urb);
1198 err_free_netdev:
1199         free_netdev(netdev);
1200
1201         return -EIO;
1202 }
1203
1204 /****************************************************************
1205  *     kaweth_disconnect
1206  ****************************************************************/
1207 static void kaweth_disconnect(struct usb_interface *intf)
1208 {
1209         struct kaweth_device *kaweth = usb_get_intfdata(intf);
1210         struct net_device *netdev;
1211
1212         dev_info(&intf->dev, "Unregistering\n");
1213
1214         usb_set_intfdata(intf, NULL);
1215         if (!kaweth) {
1216                 dev_warn(&intf->dev, "unregistering non-existant device\n");
1217                 return;
1218         }
1219         netdev = kaweth->net;
1220
1221         dbg("Unregistering net device");
1222         unregister_netdev(netdev);
1223
1224         usb_free_urb(kaweth->rx_urb);
1225         usb_free_urb(kaweth->tx_urb);
1226         usb_free_urb(kaweth->irq_urb);
1227
1228         usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1229         usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1230
1231         free_netdev(netdev);
1232 }
1233
1234
1235 // FIXME this completion stuff is a modified clone of
1236 // an OLD version of some stuff in usb.c ...
1237 struct usb_api_data {
1238         wait_queue_head_t wqh;
1239         int done;
1240 };
1241
1242 /*-------------------------------------------------------------------*
1243  * completion handler for compatibility wrappers (sync control/bulk) *
1244  *-------------------------------------------------------------------*/
1245 static void usb_api_blocking_completion(struct urb *urb)
1246 {
1247         struct usb_api_data *awd = (struct usb_api_data *)urb->context;
1248
1249         awd->done=1;
1250         wake_up(&awd->wqh);
1251 }
1252
1253 /*-------------------------------------------------------------------*
1254  *                         COMPATIBILITY STUFF                       *
1255  *-------------------------------------------------------------------*/
1256
1257 // Starts urb and waits for completion or timeout
1258 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
1259 {
1260         struct usb_api_data awd;
1261         int status;
1262
1263         init_waitqueue_head(&awd.wqh);
1264         awd.done = 0;
1265
1266         urb->context = &awd;
1267         status = usb_submit_urb(urb, GFP_NOIO);
1268         if (status) {
1269                 // something went wrong
1270                 usb_free_urb(urb);
1271                 return status;
1272         }
1273
1274         if (!wait_event_timeout(awd.wqh, awd.done, timeout)) {
1275                 // timeout
1276                 dev_warn(&urb->dev->dev, "usb_control/bulk_msg: timeout\n");
1277                 usb_kill_urb(urb);  // remove urb safely
1278                 status = -ETIMEDOUT;
1279         }
1280         else {
1281                 status = urb->status;
1282         }
1283
1284         if (actual_length) {
1285                 *actual_length = urb->actual_length;
1286         }
1287
1288         usb_free_urb(urb);
1289         return status;
1290 }
1291
1292 /*-------------------------------------------------------------------*/
1293 // returns status (negative) or length (positive)
1294 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
1295                                        unsigned int pipe,
1296                                        struct usb_ctrlrequest *cmd, void *data,
1297                                        int len, int timeout)
1298 {
1299         struct urb *urb;
1300         int retv;
1301         int length = 0; /* shut up GCC */
1302
1303         urb = usb_alloc_urb(0, GFP_NOIO);
1304         if (!urb)
1305                 return -ENOMEM;
1306
1307         usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data,
1308                          len, usb_api_blocking_completion, NULL);
1309
1310         retv = usb_start_wait_urb(urb, timeout, &length);
1311         if (retv < 0) {
1312                 return retv;
1313         }
1314         else {
1315                 return length;
1316         }
1317 }
1318
1319
1320 /****************************************************************
1321  *     kaweth_init
1322  ****************************************************************/
1323 static int __init kaweth_init(void)
1324 {
1325         dbg("Driver loading");
1326         return usb_register(&kaweth_driver);
1327 }
1328
1329 /****************************************************************
1330  *     kaweth_exit
1331  ****************************************************************/
1332 static void __exit kaweth_exit(void)
1333 {
1334         usb_deregister(&kaweth_driver);
1335 }
1336
1337 module_init(kaweth_init);
1338 module_exit(kaweth_exit);
1339
1340
1341
1342
1343
1344
1345
1346
1347