drivers/net/usb/kaweth.c

   1 /****************************************************************
   2  *
   3  *     kaweth.c - driver for KL5KUSB101 based USB->Ethernet
   4  *
   5  *     (c) 2000 Interlan Communications
   6  *     (c) 2000 Stephane Alnet
   7  *     (C) 2001 Brad Hards
   8  *     (C) 2002 Oliver Neukum
   9  *
  10  *     Original author: The Zapman <zapman@interlan.net>
  11  *     Inspired by, and much credit goes to Michael Rothwell
  12  *     <rothwell@interlan.net> for the test equipment, help, and patience
  13  *     Based off of (and with thanks to) Petko Manolov's pegaus.c driver.
  14  *     Also many thanks to Joel Silverman and Ed Surprenant at Kawasaki
  15  *     for providing the firmware and driver resources.
  16  *
  17  *     This program is free software; you can redistribute it and/or
  18  *     modify it under the terms of the GNU General Public License as
  19  *     published by the Free Software Foundation; either version 2, or
  20  *     (at your option) any later version.
  21  *
  22  *     This program is distributed in the hope that it will be useful,
  23  *     but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25  *     GNU General Public License for more details.
  26  *
  27  *     You should have received a copy of the GNU General Public License
  28  *     along with this program; if not, write to the Free Software Foundation,
  29  *     Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  30  *
  31  ****************************************************************/
  32
  33 /* TODO:
  34  * Fix in_interrupt() problem
  35  * Develop test procedures for USB net interfaces
  36  * Run test procedures
  37  * Fix bugs from previous two steps
  38  * Snoop other OSs for any tricks we're not doing
  39  * SMP locking
  40  * Reduce arbitrary timeouts
  41  * Smart multicast support
  42  * Temporary MAC change support
  43  * Tunable SOFs parameter - ioctl()?
  44  * Ethernet stats collection
  45  * Code formatting improvements
  46  */
  47
  48 #include <linux/module.h>
  49 #include <linux/slab.h>
  50 #include <linux/string.h>
  51 #include <linux/init.h>
  52 #include <linux/delay.h>
  53 #include <linux/netdevice.h>
  54 #include <linux/etherdevice.h>
  55 #include <linux/usb.h>
  56 #include <linux/types.h>
  57 #include <linux/ethtool.h>
  58 #include <linux/dma-mapping.h>
  59 #include <linux/wait.h>
  60 #include <linux/firmware.h>
  61 #include <asm/uaccess.h>
  62 #include <asm/byteorder.h>
  63
  64 #undef DEBUG
  65
  66 #define KAWETH_MTU                      1514
  67 #define KAWETH_BUF_SIZE                 1664
  68 #define KAWETH_TX_TIMEOUT               (5 * HZ)
  69 #define KAWETH_SCRATCH_SIZE             32
  70 #define KAWETH_FIRMWARE_BUF_SIZE        4096
  71 #define KAWETH_CONTROL_TIMEOUT          (30000)
  72
  73 #define KAWETH_STATUS_BROKEN            0x0000001
  74 #define KAWETH_STATUS_CLOSING           0x0000002
  75 #define KAWETH_STATUS_SUSPENDING        0x0000004
  76
  77 #define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING)
  78
  79 #define KAWETH_PACKET_FILTER_PROMISCUOUS        0x01
  80 #define KAWETH_PACKET_FILTER_ALL_MULTICAST      0x02
  81 #define KAWETH_PACKET_FILTER_DIRECTED           0x04
  82 #define KAWETH_PACKET_FILTER_BROADCAST          0x08
  83 #define KAWETH_PACKET_FILTER_MULTICAST          0x10
  84
  85 /* Table 7 */
  86 #define KAWETH_COMMAND_GET_ETHERNET_DESC        0x00
  87 #define KAWETH_COMMAND_MULTICAST_FILTERS        0x01
  88 #define KAWETH_COMMAND_SET_PACKET_FILTER        0x02
  89 #define KAWETH_COMMAND_STATISTICS               0x03
  90 #define KAWETH_COMMAND_SET_TEMP_MAC             0x06
  91 #define KAWETH_COMMAND_GET_TEMP_MAC             0x07
  92 #define KAWETH_COMMAND_SET_URB_SIZE             0x08
  93 #define KAWETH_COMMAND_SET_SOFS_WAIT            0x09
  94 #define KAWETH_COMMAND_SCAN                     0xFF
  95
  96 #define KAWETH_SOFS_TO_WAIT                     0x05
  97
  98 #define INTBUFFERSIZE                           4
  99
 100 #define STATE_OFFSET                            0
 101 #define STATE_MASK                              0x40
 102 #define STATE_SHIFT                             5
 103
 104 #define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED)
 105
 106
 107 MODULE_AUTHOR("Michael Zappe <zapman@interlan.net>, Stephane Alnet <stephane@u-picardie.fr>, Brad Hards <bhards@bigpond.net.au> and Oliver Neukum <oliver@neukum.org>");
 108 MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver");
 109 MODULE_LICENSE("GPL");
 110 MODULE_FIRMWARE("kaweth/new_code.bin");
 111 MODULE_FIRMWARE("kaweth/new_code_fix.bin");
 112 MODULE_FIRMWARE("kaweth/trigger_code.bin");
 113 MODULE_FIRMWARE("kaweth/trigger_code_fix.bin");
 114
 115 static const char driver_name[] = "kaweth";
 116
 117 static int kaweth_probe(
 118                 struct usb_interface *intf,
 119                 const struct usb_device_id *id  /* from id_table */
 120         );
 121 static void kaweth_disconnect(struct usb_interface *intf);
 122 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
 123                                        unsigned int pipe,
 124                                        struct usb_ctrlrequest *cmd, void *data,
 125                                        int len, int timeout);
 126 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message);
 127 static int kaweth_resume(struct usb_interface *intf);
 128
 129 /****************************************************************
 130  *     usb_device_id
 131  ****************************************************************/
 132 static struct usb_device_id usb_klsi_table[] = {
 133         { USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */
 134         { USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */
 135         { USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */
 136         { USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */
 137         { USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */
 138         { USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */
 139         { USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */
 140         { USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */
 141         { USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */
 142         { USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */
 143         { USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */
 144         { USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */
 145         { USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */
 146         { USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */
 147         { USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */
 148         { USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */
 149         { USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */
 150         { USB_DEVICE(0x0846, 0x1001) }, /* NetGear EA-101 */
 151         { USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */
 152         { USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */
 153         { USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */
 154         { USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */
 155         { USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */
 156         { USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */
 157         { USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */
 158         { USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */
 159         { USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */
 160         { USB_DEVICE(0x1485, 0x0001) }, /* Silicom U2E */
 161         { USB_DEVICE(0x1485, 0x0002) }, /* Psion Dacom Gold Port Ethernet */
 162         { USB_DEVICE(0x1645, 0x0005) }, /* Entrega E45 */
 163         { USB_DEVICE(0x1645, 0x0008) }, /* Entrega USB Ethernet Adapter */
 164         { USB_DEVICE(0x1645, 0x8005) }, /* PortGear Ethernet Adapter */
 165         { USB_DEVICE(0x1668, 0x0323) }, /* Actiontec USB Ethernet */
 166         { USB_DEVICE(0x2001, 0x4000) }, /* D-link DSB-650C */
 167         {} /* Null terminator */
 168 };
 169
 170 MODULE_DEVICE_TABLE (usb, usb_klsi_table);
 171
 172 /****************************************************************
 173  *     kaweth_driver
 174  ****************************************************************/
 175 static struct usb_driver kaweth_driver = {
 176         .name =         driver_name,
 177         .probe =        kaweth_probe,
 178         .disconnect =   kaweth_disconnect,
 179         .suspend =      kaweth_suspend,
 180         .resume =       kaweth_resume,
 181         .id_table =     usb_klsi_table,
 182         .supports_autosuspend = 1,
 183 };
 184
 185 typedef __u8 eth_addr_t[6];
 186
 187 /****************************************************************
 188  *     usb_eth_dev
 189  ****************************************************************/
 190 struct usb_eth_dev {
 191         char *name;
 192         __u16 vendor;
 193         __u16 device;
 194         void *pdata;
 195 };
 196
 197 /****************************************************************
 198  *     kaweth_ethernet_configuration
 199  *     Refer Table 8
 200  ****************************************************************/
 201 struct kaweth_ethernet_configuration
 202 {
 203         __u8 size;
 204         __u8 reserved1;
 205         __u8 reserved2;
 206         eth_addr_t hw_addr;
 207         __u32 statistics_mask;
 208         __le16 segment_size;
 209         __u16 max_multicast_filters;
 210         __u8 reserved3;
 211 } __attribute__ ((packed));
 212
 213 /****************************************************************
 214  *     kaweth_device
 215  ****************************************************************/
 216 struct kaweth_device
 217 {
 218         spinlock_t device_lock;
 219
 220         __u32 status;
 221         int end;
 222         int suspend_lowmem_rx;
 223         int suspend_lowmem_ctrl;
 224         int linkstate;
 225         int opened;
 226         struct delayed_work lowmem_work;
 227
 228         struct usb_device *dev;
 229         struct usb_interface *intf;
 230         struct net_device *net;
 231         wait_queue_head_t term_wait;
 232
 233         struct urb *rx_urb;
 234         struct urb *tx_urb;
 235         struct urb *irq_urb;
 236
 237         dma_addr_t intbufferhandle;
 238         __u8 *intbuffer;
 239         dma_addr_t rxbufferhandle;
 240         __u8 *rx_buf;
 241
 242
 243         struct sk_buff *tx_skb;
 244
 245         __u8 *firmware_buf;
 246         __u8 scratch[KAWETH_SCRATCH_SIZE];
 247         __u16 packet_filter_bitmap;
 248
 249         struct kaweth_ethernet_configuration configuration;
 250
 251         struct net_device_stats stats;
 252 };
 253
 254
 255 /****************************************************************
 256  *     kaweth_control
 257  ****************************************************************/
 258 static int kaweth_control(struct kaweth_device *kaweth,
 259                           unsigned int pipe,
 260                           __u8 request,
 261                           __u8 requesttype,
 262                           __u16 value,
 263                           __u16 index,
 264                           void *data,
 265                           __u16 size,
 266                           int timeout)
 267 {
 268         struct usb_ctrlrequest *dr;
 269
 270         dbg("kaweth_control()");
 271
 272         if(in_interrupt()) {
 273                 dbg("in_interrupt()");
 274                 return -EBUSY;
 275         }
 276
 277         dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
 278
 279         if (!dr) {
 280                 dbg("kmalloc() failed");
 281                 return -ENOMEM;
 282         }
 283
 284         dr->bRequestType= requesttype;
 285         dr->bRequest = request;
 286         dr->wValue = cpu_to_le16p(&value);
 287         dr->wIndex = cpu_to_le16p(&index);
 288         dr->wLength = cpu_to_le16p(&size);
 289
 290         return kaweth_internal_control_msg(kaweth->dev,
 291                                         pipe,
 292                                         dr,
 293                                         data,
 294                                         size,
 295                                         timeout);
 296 }
 297
 298 /****************************************************************
 299  *     kaweth_read_configuration
 300  ****************************************************************/
 301 static int kaweth_read_configuration(struct kaweth_device *kaweth)
 302 {
 303         int retval;
 304
 305         dbg("Reading kaweth configuration");
 306
 307         retval = kaweth_control(kaweth,
 308                                 usb_rcvctrlpipe(kaweth->dev, 0),
 309                                 KAWETH_COMMAND_GET_ETHERNET_DESC,
 310                                 USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE,
 311                                 0,
 312                                 0,
 313                                 (void *)&kaweth->configuration,
 314                                 sizeof(kaweth->configuration),
 315                                 KAWETH_CONTROL_TIMEOUT);
 316
 317         return retval;
 318 }
 319
 320 /****************************************************************
 321  *     kaweth_set_urb_size
 322  ****************************************************************/
 323 static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size)
 324 {
 325         int retval;
 326
 327         dbg("Setting URB size to %d", (unsigned)urb_size);
 328
 329         retval = kaweth_control(kaweth,
 330                                 usb_sndctrlpipe(kaweth->dev, 0),
 331                                 KAWETH_COMMAND_SET_URB_SIZE,
 332                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 333                                 urb_size,
 334                                 0,
 335                                 (void *)&kaweth->scratch,
 336                                 0,
 337                                 KAWETH_CONTROL_TIMEOUT);
 338
 339         return retval;
 340 }
 341
 342 /****************************************************************
 343  *     kaweth_set_sofs_wait
 344  ****************************************************************/
 345 static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait)
 346 {
 347         int retval;
 348
 349         dbg("Set SOFS wait to %d", (unsigned)sofs_wait);
 350
 351         retval = kaweth_control(kaweth,
 352                                 usb_sndctrlpipe(kaweth->dev, 0),
 353                                 KAWETH_COMMAND_SET_SOFS_WAIT,
 354                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 355                                 sofs_wait,
 356                                 0,
 357                                 (void *)&kaweth->scratch,
 358                                 0,
 359                                 KAWETH_CONTROL_TIMEOUT);
 360
 361         return retval;
 362 }
 363
 364 /****************************************************************
 365  *     kaweth_set_receive_filter
 366  ****************************************************************/
 367 static int kaweth_set_receive_filter(struct kaweth_device *kaweth,
 368                                      __u16 receive_filter)
 369 {
 370         int retval;
 371
 372         dbg("Set receive filter to %d", (unsigned)receive_filter);
 373
 374         retval = kaweth_control(kaweth,
 375                                 usb_sndctrlpipe(kaweth->dev, 0),
 376                                 KAWETH_COMMAND_SET_PACKET_FILTER,
 377                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 378                                 receive_filter,
 379                                 0,
 380                                 (void *)&kaweth->scratch,
 381                                 0,
 382                                 KAWETH_CONTROL_TIMEOUT);
 383
 384         return retval;
 385 }
 386
 387 /****************************************************************
 388  *     kaweth_download_firmware
 389  ****************************************************************/
 390 static int kaweth_download_firmware(struct kaweth_device *kaweth,
 391                                     const char *fwname,
 392                                     __u8 interrupt,
 393                                     __u8 type)
 394 {
 395         const struct firmware *fw;
 396         int data_len;
 397         int ret;
 398
 399         ret = request_firmware(&fw, fwname, &kaweth->dev->dev);
 400         if (ret) {
 401                 err("Firmware request failed\n");
 402                 return ret;
 403         }
 404
 405         if (fw->size > KAWETH_FIRMWARE_BUF_SIZE) {
 406                 err("Firmware too big: %zu", fw->size);
 407                 return -ENOSPC;
 408         }
 409         data_len = fw->size;
 410         memcpy(kaweth->firmware_buf, fw->data, fw->size);
 411
 412         release_firmware(fw);
 413
 414         kaweth->firmware_buf[2] = (data_len & 0xFF) - 7;
 415         kaweth->firmware_buf[3] = data_len >> 8;
 416         kaweth->firmware_buf[4] = type;
 417         kaweth->firmware_buf[5] = interrupt;
 418
 419         dbg("High: %i, Low:%i", kaweth->firmware_buf[3],
 420                    kaweth->firmware_buf[2]);
 421
 422         dbg("Downloading firmware at %p to kaweth device at %p",
 423             fw->data, kaweth);
 424         dbg("Firmware length: %d", data_len);
 425
 426         return kaweth_control(kaweth,
 427                               usb_sndctrlpipe(kaweth->dev, 0),
 428                               KAWETH_COMMAND_SCAN,
 429                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 430                               0,
 431                               0,
 432                               (void *)kaweth->firmware_buf,
 433                               data_len,
 434                               KAWETH_CONTROL_TIMEOUT);
 435 }
 436
 437 /****************************************************************
 438  *     kaweth_trigger_firmware
 439  ****************************************************************/
 440 static int kaweth_trigger_firmware(struct kaweth_device *kaweth,
 441                                    __u8 interrupt)
 442 {
 443         kaweth->firmware_buf[0] = 0xB6;
 444         kaweth->firmware_buf[1] = 0xC3;
 445         kaweth->firmware_buf[2] = 0x01;
 446         kaweth->firmware_buf[3] = 0x00;
 447         kaweth->firmware_buf[4] = 0x06;
 448         kaweth->firmware_buf[5] = interrupt;
 449         kaweth->firmware_buf[6] = 0x00;
 450         kaweth->firmware_buf[7] = 0x00;
 451
 452         dbg("Triggering firmware");
 453
 454         return kaweth_control(kaweth,
 455                               usb_sndctrlpipe(kaweth->dev, 0),
 456                               KAWETH_COMMAND_SCAN,
 457                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 458                               0,
 459                               0,
 460                               (void *)kaweth->firmware_buf,
 461                               8,
 462                               KAWETH_CONTROL_TIMEOUT);
 463 }
 464
 465 /****************************************************************
 466  *     kaweth_reset
 467  ****************************************************************/
 468 static int kaweth_reset(struct kaweth_device *kaweth)
 469 {
 470         int result;
 471
 472         dbg("kaweth_reset(%p)", kaweth);
 473         result = kaweth_control(kaweth,
 474                                 usb_sndctrlpipe(kaweth->dev, 0),
 475                                 USB_REQ_SET_CONFIGURATION,
 476                                 0,
 477                                 kaweth->dev->config[0].desc.bConfigurationValue,
 478                                 0,
 479                                 NULL,
 480                                 0,
 481                                 KAWETH_CONTROL_TIMEOUT);
 482
 483         mdelay(10);
 484
 485         dbg("kaweth_reset() returns %d.",result);
 486
 487         return result;
 488 }
 489
 490 static void kaweth_usb_receive(struct urb *);
 491 static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t);
 492
 493 /****************************************************************
 494         int_callback
 495 *****************************************************************/
 496
 497 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf)
 498 {
 499         int status;
 500
 501         status = usb_submit_urb (kaweth->irq_urb, mf);
 502         if (unlikely(status == -ENOMEM)) {
 503                 kaweth->suspend_lowmem_ctrl = 1;
 504                 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
 505         } else {
 506                 kaweth->suspend_lowmem_ctrl = 0;
 507         }
 508
 509         if (status)
 510                 err ("can't resubmit intr, %s-%s, status %d",
 511                                 kaweth->dev->bus->bus_name,
 512                                 kaweth->dev->devpath, status);
 513 }
 514
 515 static void int_callback(struct urb *u)
 516 {
 517         struct kaweth_device *kaweth = u->context;
 518         int act_state;
 519
 520         switch (u->status) {
 521         case 0:                 /* success */
 522                 break;
 523         case -ECONNRESET:       /* unlink */
 524         case -ENOENT:
 525         case -ESHUTDOWN:
 526                 return;
 527         /* -EPIPE:  should clear the halt */
 528         default:                /* error */
 529                 goto resubmit;
 530         }
 531
 532         /* we check the link state to report changes */
 533         if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) {
 534                 if (act_state)
 535                         netif_carrier_on(kaweth->net);
 536                 else
 537                         netif_carrier_off(kaweth->net);
 538
 539                 kaweth->linkstate = act_state;
 540         }
 541 resubmit:
 542         kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC);
 543 }
 544
 545 static void kaweth_resubmit_tl(struct work_struct *work)
 546 {
 547         struct kaweth_device *kaweth =
 548                 container_of(work, struct kaweth_device, lowmem_work.work);
 549
 550         if (IS_BLOCKED(kaweth->status))
 551                 return;
 552
 553         if (kaweth->suspend_lowmem_rx)
 554                 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
 555
 556         if (kaweth->suspend_lowmem_ctrl)
 557                 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
 558 }
 559
 560
 561 /****************************************************************
 562  *     kaweth_resubmit_rx_urb
 563  ****************************************************************/
 564 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth,
 565                                                 gfp_t mem_flags)
 566 {
 567         int result;
 568
 569         usb_fill_bulk_urb(kaweth->rx_urb,
 570                       kaweth->dev,
 571                       usb_rcvbulkpipe(kaweth->dev, 1),
 572                       kaweth->rx_buf,
 573                       KAWETH_BUF_SIZE,
 574                       kaweth_usb_receive,
 575                       kaweth);
 576         kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 577         kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle;
 578
 579         if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) {
 580                 if (result == -ENOMEM) {
 581                         kaweth->suspend_lowmem_rx = 1;
 582                         schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
 583                 }
 584                 err("resubmitting rx_urb %d failed", result);
 585         } else {
 586                 kaweth->suspend_lowmem_rx = 0;
 587         }
 588
 589         return result;
 590 }
 591
 592 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth);
 593
 594 /****************************************************************
 595  *     kaweth_usb_receive
 596  ****************************************************************/
 597 static void kaweth_usb_receive(struct urb *urb)
 598 {
 599         struct kaweth_device *kaweth = urb->context;
 600         struct net_device *net = kaweth->net;
 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(urb->status == -ECONNRESET || urb->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(urb->status && urb->status != -EREMOTEIO && count != 1) {
 625                 err("%s RX status: %d count: %d packet_len: %d",
 626                            net->name,
 627                            urb->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
 779         if (unlikely(urb->status != 0))
 780                 if (urb->status != -ENOENT)
 781                         dbg("%s: TX status %d.", kaweth->net->name, urb->status);
 782
 783         netif_wake_queue(kaweth->net);
 784         dev_kfree_skb_irq(skb);
 785 }
 786
 787 /****************************************************************
 788  *     kaweth_start_xmit
 789  ****************************************************************/
 790 static int kaweth_start_xmit(struct sk_buff *skb, struct net_device *net)
 791 {
 792         struct kaweth_device *kaweth = netdev_priv(net);
 793         __le16 *private_header;
 794
 795         int res;
 796
 797         spin_lock(&kaweth->device_lock);
 798
 799         kaweth_async_set_rx_mode(kaweth);
 800         netif_stop_queue(net);
 801         if (IS_BLOCKED(kaweth->status)) {
 802                 goto skip;
 803         }
 804
 805         /* We now decide whether we can put our special header into the sk_buff */
 806         if (skb_cloned(skb) || skb_headroom(skb) < 2) {
 807                 /* no such luck - we make our own */
 808                 struct sk_buff *copied_skb;
 809                 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC);
 810                 dev_kfree_skb_irq(skb);
 811                 skb = copied_skb;
 812                 if (!copied_skb) {
 813                         kaweth->stats.tx_errors++;
 814                         netif_start_queue(net);
 815                         spin_unlock(&kaweth->device_lock);
 816                         return 0;
 817                 }
 818         }
 819
 820         private_header = (__le16 *)__skb_push(skb, 2);
 821         *private_header = cpu_to_le16(skb->len-2);
 822         kaweth->tx_skb = skb;
 823
 824         usb_fill_bulk_urb(kaweth->tx_urb,
 825                       kaweth->dev,
 826                       usb_sndbulkpipe(kaweth->dev, 2),
 827                       private_header,
 828                       skb->len,
 829                       kaweth_usb_transmit_complete,
 830                       kaweth);
 831         kaweth->end = 0;
 832
 833         if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
 834         {
 835                 warn("kaweth failed tx_urb %d", res);
 836 skip:
 837                 kaweth->stats.tx_errors++;
 838
 839                 netif_start_queue(net);
 840                 dev_kfree_skb_irq(skb);
 841         }
 842         else
 843         {
 844                 kaweth->stats.tx_packets++;
 845                 kaweth->stats.tx_bytes += skb->len;
 846                 net->trans_start = jiffies;
 847         }
 848
 849         spin_unlock(&kaweth->device_lock);
 850
 851         return 0;
 852 }
 853
 854 /****************************************************************
 855  *     kaweth_set_rx_mode
 856  ****************************************************************/
 857 static void kaweth_set_rx_mode(struct net_device *net)
 858 {
 859         struct kaweth_device *kaweth = netdev_priv(net);
 860
 861         __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
 862                                      KAWETH_PACKET_FILTER_BROADCAST |
 863                                      KAWETH_PACKET_FILTER_MULTICAST;
 864
 865         dbg("Setting Rx mode to %d", packet_filter_bitmap);
 866
 867         netif_stop_queue(net);
 868
 869         if (net->flags & IFF_PROMISC) {
 870                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
 871         }
 872         else if ((net->mc_count) || (net->flags & IFF_ALLMULTI)) {
 873                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
 874         }
 875
 876         kaweth->packet_filter_bitmap = packet_filter_bitmap;
 877         netif_wake_queue(net);
 878 }
 879
 880 /****************************************************************
 881  *     kaweth_async_set_rx_mode
 882  ****************************************************************/
 883 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
 884 {
 885         __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
 886         kaweth->packet_filter_bitmap = 0;
 887         if (packet_filter_bitmap == 0)
 888                 return;
 889
 890         {
 891         int result;
 892         result = kaweth_control(kaweth,
 893                                 usb_sndctrlpipe(kaweth->dev, 0),
 894                                 KAWETH_COMMAND_SET_PACKET_FILTER,
 895                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 896                                 packet_filter_bitmap,
 897                                 0,
 898                                 (void *)&kaweth->scratch,
 899                                 0,
 900                                 KAWETH_CONTROL_TIMEOUT);
 901
 902         if(result < 0) {
 903                 err("Failed to set Rx mode: %d", result);
 904         }
 905         else {
 906                 dbg("Set Rx mode to %d", packet_filter_bitmap);
 907         }
 908         }
 909 }
 910
 911 /****************************************************************
 912  *     kaweth_netdev_stats
 913  ****************************************************************/
 914 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev)
 915 {
 916         struct kaweth_device *kaweth = netdev_priv(dev);
 917         return &kaweth->stats;
 918 }
 919
 920 /****************************************************************
 921  *     kaweth_tx_timeout
 922  ****************************************************************/
 923 static void kaweth_tx_timeout(struct net_device *net)
 924 {
 925         struct kaweth_device *kaweth = netdev_priv(net);
 926
 927         warn("%s: Tx timed out. Resetting.", net->name);
 928         kaweth->stats.tx_errors++;
 929         net->trans_start = jiffies;
 930
 931         usb_unlink_urb(kaweth->tx_urb);
 932 }
 933
 934 /****************************************************************
 935  *     kaweth_suspend
 936  ****************************************************************/
 937 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message)
 938 {
 939         struct kaweth_device *kaweth = usb_get_intfdata(intf);
 940         unsigned long flags;
 941
 942         dbg("Suspending device");
 943         spin_lock_irqsave(&kaweth->device_lock, flags);
 944         kaweth->status |= KAWETH_STATUS_SUSPENDING;
 945         spin_unlock_irqrestore(&kaweth->device_lock, flags);
 946
 947         kaweth_kill_urbs(kaweth);
 948         return 0;
 949 }
 950
 951 /****************************************************************
 952  *     kaweth_resume
 953  ****************************************************************/
 954 static int kaweth_resume(struct usb_interface *intf)
 955 {
 956         struct kaweth_device *kaweth = usb_get_intfdata(intf);
 957         unsigned long flags;
 958
 959         dbg("Resuming device");
 960         spin_lock_irqsave(&kaweth->device_lock, flags);
 961         kaweth->status &= ~KAWETH_STATUS_SUSPENDING;
 962         spin_unlock_irqrestore(&kaweth->device_lock, flags);
 963
 964         if (!kaweth->opened)
 965                 return 0;
 966         kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
 967         kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
 968
 969         return 0;
 970 }
 971
 972 /****************************************************************
 973  *     kaweth_probe
 974  ****************************************************************/
 975 static int kaweth_probe(
 976                 struct usb_interface *intf,
 977                 const struct usb_device_id *id      /* from id_table */
 978         )
 979 {
 980         struct usb_device *dev = interface_to_usbdev(intf);
 981         struct kaweth_device *kaweth;
 982         struct net_device *netdev;
 983         const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 984         int result = 0;
 985
 986         dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x",
 987                  dev->devnum,
 988                  le16_to_cpu(dev->descriptor.idVendor),
 989                  le16_to_cpu(dev->descriptor.idProduct),
 990                  le16_to_cpu(dev->descriptor.bcdDevice));
 991
 992         dbg("Device at %p", dev);
 993
 994         dbg("Descriptor length: %x type: %x",
 995                  (int)dev->descriptor.bLength,
 996                  (int)dev->descriptor.bDescriptorType);
 997
 998         netdev = alloc_etherdev(sizeof(*kaweth));
 999         if (!netdev)
1000                 return -ENOMEM;
1001
1002         kaweth = netdev_priv(netdev);
1003         kaweth->dev = dev;
1004         kaweth->net = netdev;
1005
1006         spin_lock_init(&kaweth->device_lock);
1007         init_waitqueue_head(&kaweth->term_wait);
1008
1009         dbg("Resetting.");
1010
1011         kaweth_reset(kaweth);
1012
1013         /*
1014          * If high byte of bcdDevice is nonzero, firmware is already
1015          * downloaded. Don't try to do it again, or we'll hang the device.
1016          */
1017
1018         if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) {
1019                 info("Firmware present in device.");
1020         } else {
1021                 /* Download the firmware */
1022                 info("Downloading firmware...");
1023                 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
1024                 if ((result = kaweth_download_firmware(kaweth,
1025                                                       "kaweth/new_code.bin",
1026                                                       100,
1027                                                       2)) < 0) {
1028                         err("Error downloading firmware (%d)", result);
1029                         goto err_fw;
1030                 }
1031
1032                 if ((result = kaweth_download_firmware(kaweth,
1033                                                       "kaweth/new_code_fix.bin",
1034                                                       100,
1035                                                       3)) < 0) {
1036                         err("Error downloading firmware fix (%d)", result);
1037                         goto err_fw;
1038                 }
1039
1040                 if ((result = kaweth_download_firmware(kaweth,
1041                                                       "kaweth/trigger_code.bin",
1042                                                       126,
1043                                                       2)) < 0) {
1044                         err("Error downloading trigger code (%d)", result);
1045                         goto err_fw;
1046
1047                 }
1048
1049                 if ((result = kaweth_download_firmware(kaweth,
1050                                                       "kaweth/trigger_code_fix.bin",
1051                                                       126,
1052                                                       3)) < 0) {
1053                         err("Error downloading trigger code fix (%d)", result);
1054                         goto err_fw;
1055                 }
1056
1057
1058                 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
1059                         err("Error triggering firmware (%d)", result);
1060                         goto err_fw;
1061                 }
1062
1063                 /* Device will now disappear for a moment...  */
1064                 info("Firmware loaded.  I'll be back...");
1065 err_fw:
1066                 free_page((unsigned long)kaweth->firmware_buf);
1067                 free_netdev(netdev);
1068                 return -EIO;
1069         }
1070
1071         result = kaweth_read_configuration(kaweth);
1072
1073         if(result < 0) {
1074                 err("Error reading configuration (%d), no net device created", result);
1075                 goto err_free_netdev;
1076         }
1077
1078         info("Statistics collection: %x", kaweth->configuration.statistics_mask);
1079         info("Multicast filter limit: %x", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
1080         info("MTU: %d", le16_to_cpu(kaweth->configuration.segment_size));
1081         info("Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
1082                  (int)kaweth->configuration.hw_addr[0],
1083                  (int)kaweth->configuration.hw_addr[1],
1084                  (int)kaweth->configuration.hw_addr[2],
1085                  (int)kaweth->configuration.hw_addr[3],
1086                  (int)kaweth->configuration.hw_addr[4],
1087                  (int)kaweth->configuration.hw_addr[5]);
1088
1089         if(!memcmp(&kaweth->configuration.hw_addr,
1090                    &bcast_addr,
1091                    sizeof(bcast_addr))) {
1092                 err("Firmware not functioning properly, no net device created");
1093                 goto err_free_netdev;
1094         }
1095
1096         if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
1097                 dbg("Error setting URB size");
1098                 goto err_free_netdev;
1099         }
1100
1101         if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
1102                 err("Error setting SOFS wait");
1103                 goto err_free_netdev;
1104         }
1105
1106         result = kaweth_set_receive_filter(kaweth,
1107                                            KAWETH_PACKET_FILTER_DIRECTED |
1108                                            KAWETH_PACKET_FILTER_BROADCAST |
1109                                            KAWETH_PACKET_FILTER_MULTICAST);
1110
1111         if(result < 0) {
1112                 err("Error setting receive filter");
1113                 goto err_free_netdev;
1114         }
1115
1116         dbg("Initializing net device.");
1117
1118         kaweth->intf = intf;
1119
1120         kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1121         if (!kaweth->tx_urb)
1122                 goto err_free_netdev;
1123         kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1124         if (!kaweth->rx_urb)
1125                 goto err_only_tx;
1126         kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1127         if (!kaweth->irq_urb)
1128                 goto err_tx_and_rx;
1129
1130         kaweth->intbuffer = usb_buffer_alloc(   kaweth->dev,
1131                                                 INTBUFFERSIZE,
1132                                                 GFP_KERNEL,
1133                                                 &kaweth->intbufferhandle);
1134         if (!kaweth->intbuffer)
1135                 goto err_tx_and_rx_and_irq;
1136         kaweth->rx_buf = usb_buffer_alloc(      kaweth->dev,
1137                                                 KAWETH_BUF_SIZE,
1138                                                 GFP_KERNEL,
1139                                                 &kaweth->rxbufferhandle);
1140         if (!kaweth->rx_buf)
1141                 goto err_all_but_rxbuf;
1142
1143         memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr));
1144         memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr,
1145                sizeof(kaweth->configuration.hw_addr));
1146
1147         netdev->open = kaweth_open;
1148         netdev->stop = kaweth_close;
1149
1150         netdev->watchdog_timeo = KAWETH_TX_TIMEOUT;
1151         netdev->tx_timeout = kaweth_tx_timeout;
1152
1153         netdev->hard_start_xmit = kaweth_start_xmit;
1154         netdev->set_multicast_list = kaweth_set_rx_mode;
1155         netdev->get_stats = kaweth_netdev_stats;
1156         netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size);
1157         SET_ETHTOOL_OPS(netdev, &ops);
1158
1159         /* kaweth is zeroed as part of alloc_netdev */
1160
1161         INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl);
1162
1163         usb_set_intfdata(intf, kaweth);
1164
1165 #if 0
1166 // dma_supported() is deeply broken on almost all architectures
1167         if (dma_supported (&intf->dev, 0xffffffffffffffffULL))
1168                 kaweth->net->features |= NETIF_F_HIGHDMA;
1169 #endif
1170
1171         SET_NETDEV_DEV(netdev, &intf->dev);
1172         if (register_netdev(netdev) != 0) {
1173                 err("Error registering netdev.");
1174                 goto err_intfdata;
1175         }
1176
1177         info("kaweth interface created at %s", kaweth->net->name);
1178
1179         dbg("Kaweth probe returning.");
1180
1181         return 0;
1182
1183 err_intfdata:
1184         usb_set_intfdata(intf, NULL);
1185         usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1186 err_all_but_rxbuf:
1187         usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1188 err_tx_and_rx_and_irq:
1189         usb_free_urb(kaweth->irq_urb);
1190 err_tx_and_rx:
1191         usb_free_urb(kaweth->rx_urb);
1192 err_only_tx:
1193         usb_free_urb(kaweth->tx_urb);
1194 err_free_netdev:
1195         free_netdev(netdev);
1196
1197         return -EIO;
1198 }
1199
1200 /****************************************************************
1201  *     kaweth_disconnect
1202  ****************************************************************/
1203 static void kaweth_disconnect(struct usb_interface *intf)
1204 {
1205         struct kaweth_device *kaweth = usb_get_intfdata(intf);
1206         struct net_device *netdev;
1207
1208         info("Unregistering");
1209
1210         usb_set_intfdata(intf, NULL);
1211         if (!kaweth) {
1212                 warn("unregistering non-existant device");
1213                 return;
1214         }
1215         netdev = kaweth->net;
1216
1217         dbg("Unregistering net device");
1218         unregister_netdev(netdev);
1219
1220         usb_free_urb(kaweth->rx_urb);
1221         usb_free_urb(kaweth->tx_urb);
1222         usb_free_urb(kaweth->irq_urb);
1223
1224         usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1225         usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1226
1227         free_netdev(netdev);
1228 }
1229
1230
1231 // FIXME this completion stuff is a modified clone of
1232 // an OLD version of some stuff in usb.c ...
1233 struct usb_api_data {
1234         wait_queue_head_t wqh;
1235         int done;
1236 };
1237
1238 /*-------------------------------------------------------------------*
1239  * completion handler for compatibility wrappers (sync control/bulk) *
1240  *-------------------------------------------------------------------*/
1241 static void usb_api_blocking_completion(struct urb *urb)
1242 {
1243         struct usb_api_data *awd = (struct usb_api_data *)urb->context;
1244
1245         awd->done=1;
1246         wake_up(&awd->wqh);
1247 }
1248
1249 /*-------------------------------------------------------------------*
1250  *                         COMPATIBILITY STUFF                       *
1251  *-------------------------------------------------------------------*/
1252
1253 // Starts urb and waits for completion or timeout
1254 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
1255 {
1256         struct usb_api_data awd;
1257         int status;
1258
1259         init_waitqueue_head(&awd.wqh);
1260         awd.done = 0;
1261
1262         urb->context = &awd;
1263         status = usb_submit_urb(urb, GFP_NOIO);
1264         if (status) {
1265                 // something went wrong
1266                 usb_free_urb(urb);
1267                 return status;
1268         }
1269
1270         if (!wait_event_timeout(awd.wqh, awd.done, timeout)) {
1271                 // timeout
1272                 warn("usb_control/bulk_msg: timeout");
1273                 usb_kill_urb(urb);  // remove urb safely
1274                 status = -ETIMEDOUT;
1275         }
1276         else {
1277                 status = urb->status;
1278         }
1279
1280         if (actual_length) {
1281                 *actual_length = urb->actual_length;
1282         }
1283
1284         usb_free_urb(urb);
1285         return status;
1286 }
1287
1288 /*-------------------------------------------------------------------*/
1289 // returns status (negative) or length (positive)
1290 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
1291                                        unsigned int pipe,
1292                                        struct usb_ctrlrequest *cmd, void *data,
1293                                        int len, int timeout)
1294 {
1295         struct urb *urb;
1296         int retv;
1297         int length = 0; /* shut up GCC */
1298
1299         urb = usb_alloc_urb(0, GFP_NOIO);
1300         if (!urb)
1301                 return -ENOMEM;
1302
1303         usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data,
1304                          len, usb_api_blocking_completion, NULL);
1305
1306         retv = usb_start_wait_urb(urb, timeout, &length);
1307         if (retv < 0) {
1308                 return retv;
1309         }
1310         else {
1311                 return length;
1312         }
1313 }
1314
1315
1316 /****************************************************************
1317  *     kaweth_init
1318  ****************************************************************/
1319 static int __init kaweth_init(void)
1320 {
1321         dbg("Driver loading");
1322         return usb_register(&kaweth_driver);
1323 }
1324
1325 /****************************************************************
1326  *     kaweth_exit
1327  ****************************************************************/
1328 static void __exit kaweth_exit(void)
1329 {
1330         usb_deregister(&kaweth_driver);
1331 }
1332
1333 module_init(kaweth_init);
1334 module_exit(kaweth_exit);
1335
1336
1337
1338
1339
1340
1341
1342
1343