drivers/net/usb/kaweth.c

   1 /****************************************************************
   2  *
   3  *     kaweth.c - driver for KL5KUSB101 based USB->Ethernet
   4  *
   5  *     (c) 2000 Interlan Communications
   6  *     (c) 2000 Stephane Alnet
   7  *     (C) 2001 Brad Hards
   8  *     (C) 2002 Oliver Neukum
   9  *
  10  *     Original author: The Zapman <zapman@interlan.net>
  11  *     Inspired by, and much credit goes to Michael Rothwell
  12  *     <rothwell@interlan.net> for the test equipment, help, and patience
  13  *     Based off of (and with thanks to) Petko Manolov's pegaus.c driver.
  14  *     Also many thanks to Joel Silverman and Ed Surprenant at Kawasaki
  15  *     for providing the firmware and driver resources.
  16  *
  17  *     This program is free software; you can redistribute it and/or
  18  *     modify it under the terms of the GNU General Public License as
  19  *     published by the Free Software Foundation; either version 2, or
  20  *     (at your option) any later version.
  21  *
  22  *     This program is distributed in the hope that it will be useful,
  23  *     but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25  *     GNU General Public License for more details.
  26  *
  27  *     You should have received a copy of the GNU General Public License
  28  *     along with this program; if not, write to the Free Software Foundation,
  29  *     Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  30  *
  31  ****************************************************************/
  32
  33 /* TODO:
  34  * Develop test procedures for USB net interfaces
  35  * Run test procedures
  36  * Fix bugs from previous two steps
  37  * Snoop other OSs for any tricks we're not doing
  38  * Reduce arbitrary timeouts
  39  * Smart multicast support
  40  * Temporary MAC change support
  41  * Tunable SOFs parameter - ioctl()?
  42  * Ethernet stats collection
  43  * Code formatting improvements
  44  */
  45
  46 #include <linux/module.h>
  47 #include <linux/slab.h>
  48 #include <linux/string.h>
  49 #include <linux/init.h>
  50 #include <linux/delay.h>
  51 #include <linux/netdevice.h>
  52 #include <linux/etherdevice.h>
  53 #include <linux/usb.h>
  54 #include <linux/types.h>
  55 #include <linux/ethtool.h>
  56 #include <linux/dma-mapping.h>
  57 #include <linux/wait.h>
  58 #include <linux/firmware.h>
  59 #include <asm/uaccess.h>
  60 #include <asm/byteorder.h>
  61
  62 #undef DEBUG
  63
  64 #define KAWETH_MTU                      1514
  65 #define KAWETH_BUF_SIZE                 1664
  66 #define KAWETH_TX_TIMEOUT               (5 * HZ)
  67 #define KAWETH_SCRATCH_SIZE             32
  68 #define KAWETH_FIRMWARE_BUF_SIZE        4096
  69 #define KAWETH_CONTROL_TIMEOUT          (30000)
  70
  71 #define KAWETH_STATUS_BROKEN            0x0000001
  72 #define KAWETH_STATUS_CLOSING           0x0000002
  73 #define KAWETH_STATUS_SUSPENDING        0x0000004
  74
  75 #define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING)
  76
  77 #define KAWETH_PACKET_FILTER_PROMISCUOUS        0x01
  78 #define KAWETH_PACKET_FILTER_ALL_MULTICAST      0x02
  79 #define KAWETH_PACKET_FILTER_DIRECTED           0x04
  80 #define KAWETH_PACKET_FILTER_BROADCAST          0x08
  81 #define KAWETH_PACKET_FILTER_MULTICAST          0x10
  82
  83 /* Table 7 */
  84 #define KAWETH_COMMAND_GET_ETHERNET_DESC        0x00
  85 #define KAWETH_COMMAND_MULTICAST_FILTERS        0x01
  86 #define KAWETH_COMMAND_SET_PACKET_FILTER        0x02
  87 #define KAWETH_COMMAND_STATISTICS               0x03
  88 #define KAWETH_COMMAND_SET_TEMP_MAC             0x06
  89 #define KAWETH_COMMAND_GET_TEMP_MAC             0x07
  90 #define KAWETH_COMMAND_SET_URB_SIZE             0x08
  91 #define KAWETH_COMMAND_SET_SOFS_WAIT            0x09
  92 #define KAWETH_COMMAND_SCAN                     0xFF
  93
  94 #define KAWETH_SOFS_TO_WAIT                     0x05
  95
  96 #define INTBUFFERSIZE                           4
  97
  98 #define STATE_OFFSET                            0
  99 #define STATE_MASK                              0x40
 100 #define STATE_SHIFT                             5
 101
 102 #define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED)
 103
 104
 105 MODULE_AUTHOR("Michael Zappe <zapman@interlan.net>, Stephane Alnet <stephane@u-picardie.fr>, Brad Hards <bhards@bigpond.net.au> and Oliver Neukum <oliver@neukum.org>");
 106 MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver");
 107 MODULE_LICENSE("GPL");
 108 MODULE_FIRMWARE("kaweth/new_code.bin");
 109 MODULE_FIRMWARE("kaweth/new_code_fix.bin");
 110 MODULE_FIRMWARE("kaweth/trigger_code.bin");
 111 MODULE_FIRMWARE("kaweth/trigger_code_fix.bin");
 112
 113 static const char driver_name[] = "kaweth";
 114
 115 static int kaweth_probe(
 116                 struct usb_interface *intf,
 117                 const struct usb_device_id *id  /* from id_table */
 118         );
 119 static void kaweth_disconnect(struct usb_interface *intf);
 120 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
 121                                        unsigned int pipe,
 122                                        struct usb_ctrlrequest *cmd, void *data,
 123                                        int len, int timeout);
 124 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message);
 125 static int kaweth_resume(struct usb_interface *intf);
 126
 127 /****************************************************************
 128  *     usb_device_id
 129  ****************************************************************/
 130 static struct usb_device_id usb_klsi_table[] = {
 131         { USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */
 132         { USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */
 133         { USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */
 134         { USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */
 135         { USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */
 136         { USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */
 137         { USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */
 138         { USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */
 139         { USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */
 140         { USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */
 141         { USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */
 142         { USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */
 143         { USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */
 144         { USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */
 145         { USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */
 146         { USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */
 147         { USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */
 148         { USB_DEVICE(0x0846, 0x1001) }, /* NetGear EA-101 */
 149         { USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */
 150         { USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */
 151         { USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */
 152         { USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */
 153         { USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */
 154         { USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */
 155         { USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */
 156         { USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */
 157         { USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */
 158         { USB_DEVICE(0x1485, 0x0001) }, /* Silicom U2E */
 159         { USB_DEVICE(0x1485, 0x0002) }, /* Psion Dacom Gold Port Ethernet */
 160         { USB_DEVICE(0x1645, 0x0005) }, /* Entrega E45 */
 161         { USB_DEVICE(0x1645, 0x0008) }, /* Entrega USB Ethernet Adapter */
 162         { USB_DEVICE(0x1645, 0x8005) }, /* PortGear Ethernet Adapter */
 163         { USB_DEVICE(0x1668, 0x0323) }, /* Actiontec USB Ethernet */
 164         { USB_DEVICE(0x2001, 0x4000) }, /* D-link DSB-650C */
 165         {} /* Null terminator */
 166 };
 167
 168 MODULE_DEVICE_TABLE (usb, usb_klsi_table);
 169
 170 /****************************************************************
 171  *     kaweth_driver
 172  ****************************************************************/
 173 static struct usb_driver kaweth_driver = {
 174         .name =         driver_name,
 175         .probe =        kaweth_probe,
 176         .disconnect =   kaweth_disconnect,
 177         .suspend =      kaweth_suspend,
 178         .resume =       kaweth_resume,
 179         .id_table =     usb_klsi_table,
 180         .supports_autosuspend = 1,
 181 };
 182
 183 typedef __u8 eth_addr_t[6];
 184
 185 /****************************************************************
 186  *     usb_eth_dev
 187  ****************************************************************/
 188 struct usb_eth_dev {
 189         char *name;
 190         __u16 vendor;
 191         __u16 device;
 192         void *pdata;
 193 };
 194
 195 /****************************************************************
 196  *     kaweth_ethernet_configuration
 197  *     Refer Table 8
 198  ****************************************************************/
 199 struct kaweth_ethernet_configuration
 200 {
 201         __u8 size;
 202         __u8 reserved1;
 203         __u8 reserved2;
 204         eth_addr_t hw_addr;
 205         __u32 statistics_mask;
 206         __le16 segment_size;
 207         __u16 max_multicast_filters;
 208         __u8 reserved3;
 209 } __attribute__ ((packed));
 210
 211 /****************************************************************
 212  *     kaweth_device
 213  ****************************************************************/
 214 struct kaweth_device
 215 {
 216         spinlock_t device_lock;
 217
 218         __u32 status;
 219         int end;
 220         int suspend_lowmem_rx;
 221         int suspend_lowmem_ctrl;
 222         int linkstate;
 223         int opened;
 224         struct delayed_work lowmem_work;
 225
 226         struct usb_device *dev;
 227         struct usb_interface *intf;
 228         struct net_device *net;
 229         wait_queue_head_t term_wait;
 230
 231         struct urb *rx_urb;
 232         struct urb *tx_urb;
 233         struct urb *irq_urb;
 234
 235         dma_addr_t intbufferhandle;
 236         __u8 *intbuffer;
 237         dma_addr_t rxbufferhandle;
 238         __u8 *rx_buf;
 239
 240
 241         struct sk_buff *tx_skb;
 242
 243         __u8 *firmware_buf;
 244         __u8 scratch[KAWETH_SCRATCH_SIZE];
 245         __u16 packet_filter_bitmap;
 246
 247         struct kaweth_ethernet_configuration configuration;
 248
 249         struct net_device_stats stats;
 250 };
 251
 252 /****************************************************************
 253  *     kaweth_control
 254  ****************************************************************/
 255 static int kaweth_control(struct kaweth_device *kaweth,
 256                           unsigned int pipe,
 257                           __u8 request,
 258                           __u8 requesttype,
 259                           __u16 value,
 260                           __u16 index,
 261                           void *data,
 262                           __u16 size,
 263                           int timeout)
 264 {
 265         struct usb_ctrlrequest *dr;
 266
 267         dbg("kaweth_control()");
 268
 269         if(in_interrupt()) {
 270                 dbg("in_interrupt()");
 271                 return -EBUSY;
 272         }
 273
 274         dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
 275
 276         if (!dr) {
 277                 dbg("kmalloc() failed");
 278                 return -ENOMEM;
 279         }
 280
 281         dr->bRequestType= requesttype;
 282         dr->bRequest = request;
 283         dr->wValue = cpu_to_le16(value);
 284         dr->wIndex = cpu_to_le16(index);
 285         dr->wLength = cpu_to_le16(size);
 286
 287         return kaweth_internal_control_msg(kaweth->dev,
 288                                         pipe,
 289                                         dr,
 290                                         data,
 291                                         size,
 292                                         timeout);
 293 }
 294
 295 /****************************************************************
 296  *     kaweth_read_configuration
 297  ****************************************************************/
 298 static int kaweth_read_configuration(struct kaweth_device *kaweth)
 299 {
 300         int retval;
 301
 302         dbg("Reading kaweth configuration");
 303
 304         retval = kaweth_control(kaweth,
 305                                 usb_rcvctrlpipe(kaweth->dev, 0),
 306                                 KAWETH_COMMAND_GET_ETHERNET_DESC,
 307                                 USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE,
 308                                 0,
 309                                 0,
 310                                 (void *)&kaweth->configuration,
 311                                 sizeof(kaweth->configuration),
 312                                 KAWETH_CONTROL_TIMEOUT);
 313
 314         return retval;
 315 }
 316
 317 /****************************************************************
 318  *     kaweth_set_urb_size
 319  ****************************************************************/
 320 static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size)
 321 {
 322         int retval;
 323
 324         dbg("Setting URB size to %d", (unsigned)urb_size);
 325
 326         retval = kaweth_control(kaweth,
 327                                 usb_sndctrlpipe(kaweth->dev, 0),
 328                                 KAWETH_COMMAND_SET_URB_SIZE,
 329                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 330                                 urb_size,
 331                                 0,
 332                                 (void *)&kaweth->scratch,
 333                                 0,
 334                                 KAWETH_CONTROL_TIMEOUT);
 335
 336         return retval;
 337 }
 338
 339 /****************************************************************
 340  *     kaweth_set_sofs_wait
 341  ****************************************************************/
 342 static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait)
 343 {
 344         int retval;
 345
 346         dbg("Set SOFS wait to %d", (unsigned)sofs_wait);
 347
 348         retval = kaweth_control(kaweth,
 349                                 usb_sndctrlpipe(kaweth->dev, 0),
 350                                 KAWETH_COMMAND_SET_SOFS_WAIT,
 351                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 352                                 sofs_wait,
 353                                 0,
 354                                 (void *)&kaweth->scratch,
 355                                 0,
 356                                 KAWETH_CONTROL_TIMEOUT);
 357
 358         return retval;
 359 }
 360
 361 /****************************************************************
 362  *     kaweth_set_receive_filter
 363  ****************************************************************/
 364 static int kaweth_set_receive_filter(struct kaweth_device *kaweth,
 365                                      __u16 receive_filter)
 366 {
 367         int retval;
 368
 369         dbg("Set receive filter to %d", (unsigned)receive_filter);
 370
 371         retval = kaweth_control(kaweth,
 372                                 usb_sndctrlpipe(kaweth->dev, 0),
 373                                 KAWETH_COMMAND_SET_PACKET_FILTER,
 374                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 375                                 receive_filter,
 376                                 0,
 377                                 (void *)&kaweth->scratch,
 378                                 0,
 379                                 KAWETH_CONTROL_TIMEOUT);
 380
 381         return retval;
 382 }
 383
 384 /****************************************************************
 385  *     kaweth_download_firmware
 386  ****************************************************************/
 387 static int kaweth_download_firmware(struct kaweth_device *kaweth,
 388                                     const char *fwname,
 389                                     __u8 interrupt,
 390                                     __u8 type)
 391 {
 392         const struct firmware *fw;
 393         int data_len;
 394         int ret;
 395
 396         ret = request_firmware(&fw, fwname, &kaweth->dev->dev);
 397         if (ret) {
 398                 err("Firmware request failed\n");
 399                 return ret;
 400         }
 401
 402         if (fw->size > KAWETH_FIRMWARE_BUF_SIZE) {
 403                 err("Firmware too big: %zu", fw->size);
 404                 return -ENOSPC;
 405         }
 406         data_len = fw->size;
 407         memcpy(kaweth->firmware_buf, fw->data, fw->size);
 408
 409         release_firmware(fw);
 410
 411         kaweth->firmware_buf[2] = (data_len & 0xFF) - 7;
 412         kaweth->firmware_buf[3] = data_len >> 8;
 413         kaweth->firmware_buf[4] = type;
 414         kaweth->firmware_buf[5] = interrupt;
 415
 416         dbg("High: %i, Low:%i", kaweth->firmware_buf[3],
 417                    kaweth->firmware_buf[2]);
 418
 419         dbg("Downloading firmware at %p to kaweth device at %p",
 420             fw->data, kaweth);
 421         dbg("Firmware length: %d", data_len);
 422
 423         return kaweth_control(kaweth,
 424                               usb_sndctrlpipe(kaweth->dev, 0),
 425                               KAWETH_COMMAND_SCAN,
 426                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 427                               0,
 428                               0,
 429                               (void *)kaweth->firmware_buf,
 430                               data_len,
 431                               KAWETH_CONTROL_TIMEOUT);
 432 }
 433
 434 /****************************************************************
 435  *     kaweth_trigger_firmware
 436  ****************************************************************/
 437 static int kaweth_trigger_firmware(struct kaweth_device *kaweth,
 438                                    __u8 interrupt)
 439 {
 440         kaweth->firmware_buf[0] = 0xB6;
 441         kaweth->firmware_buf[1] = 0xC3;
 442         kaweth->firmware_buf[2] = 0x01;
 443         kaweth->firmware_buf[3] = 0x00;
 444         kaweth->firmware_buf[4] = 0x06;
 445         kaweth->firmware_buf[5] = interrupt;
 446         kaweth->firmware_buf[6] = 0x00;
 447         kaweth->firmware_buf[7] = 0x00;
 448
 449         dbg("Triggering firmware");
 450
 451         return kaweth_control(kaweth,
 452                               usb_sndctrlpipe(kaweth->dev, 0),
 453                               KAWETH_COMMAND_SCAN,
 454                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 455                               0,
 456                               0,
 457                               (void *)kaweth->firmware_buf,
 458                               8,
 459                               KAWETH_CONTROL_TIMEOUT);
 460 }
 461
 462 /****************************************************************
 463  *     kaweth_reset
 464  ****************************************************************/
 465 static int kaweth_reset(struct kaweth_device *kaweth)
 466 {
 467         int result;
 468
 469         dbg("kaweth_reset(%p)", kaweth);
 470         result = kaweth_control(kaweth,
 471                                 usb_sndctrlpipe(kaweth->dev, 0),
 472                                 USB_REQ_SET_CONFIGURATION,
 473                                 0,
 474                                 kaweth->dev->config[0].desc.bConfigurationValue,
 475                                 0,
 476                                 NULL,
 477                                 0,
 478                                 KAWETH_CONTROL_TIMEOUT);
 479
 480         mdelay(10);
 481
 482         dbg("kaweth_reset() returns %d.",result);
 483
 484         return result;
 485 }
 486
 487 static void kaweth_usb_receive(struct urb *);
 488 static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t);
 489
 490 /****************************************************************
 491         int_callback
 492 *****************************************************************/
 493
 494 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf)
 495 {
 496         int status;
 497
 498         status = usb_submit_urb (kaweth->irq_urb, mf);
 499         if (unlikely(status == -ENOMEM)) {
 500                 kaweth->suspend_lowmem_ctrl = 1;
 501                 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
 502         } else {
 503                 kaweth->suspend_lowmem_ctrl = 0;
 504         }
 505
 506         if (status)
 507                 err ("can't resubmit intr, %s-%s, status %d",
 508                                 kaweth->dev->bus->bus_name,
 509                                 kaweth->dev->devpath, status);
 510 }
 511
 512 static void int_callback(struct urb *u)
 513 {
 514         struct kaweth_device *kaweth = u->context;
 515         int act_state;
 516         int status = u->status;
 517
 518         switch (status) {
 519         case 0:                 /* success */
 520                 break;
 521         case -ECONNRESET:       /* unlink */
 522         case -ENOENT:
 523         case -ESHUTDOWN:
 524                 return;
 525         /* -EPIPE:  should clear the halt */
 526         default:                /* error */
 527                 goto resubmit;
 528         }
 529
 530         /* we check the link state to report changes */
 531         if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) {
 532                 if (act_state)
 533                         netif_carrier_on(kaweth->net);
 534                 else
 535                         netif_carrier_off(kaweth->net);
 536
 537                 kaweth->linkstate = act_state;
 538         }
 539 resubmit:
 540         kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC);
 541 }
 542
 543 static void kaweth_resubmit_tl(struct work_struct *work)
 544 {
 545         struct kaweth_device *kaweth =
 546                 container_of(work, struct kaweth_device, lowmem_work.work);
 547
 548         if (IS_BLOCKED(kaweth->status))
 549                 return;
 550
 551         if (kaweth->suspend_lowmem_rx)
 552                 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
 553
 554         if (kaweth->suspend_lowmem_ctrl)
 555                 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
 556 }
 557
 558
 559 /****************************************************************
 560  *     kaweth_resubmit_rx_urb
 561  ****************************************************************/
 562 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth,
 563                                                 gfp_t mem_flags)
 564 {
 565         int result;
 566
 567         usb_fill_bulk_urb(kaweth->rx_urb,
 568                       kaweth->dev,
 569                       usb_rcvbulkpipe(kaweth->dev, 1),
 570                       kaweth->rx_buf,
 571                       KAWETH_BUF_SIZE,
 572                       kaweth_usb_receive,
 573                       kaweth);
 574         kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 575         kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle;
 576
 577         if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) {
 578                 if (result == -ENOMEM) {
 579                         kaweth->suspend_lowmem_rx = 1;
 580                         schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
 581                 }
 582                 err("resubmitting rx_urb %d failed", result);
 583         } else {
 584                 kaweth->suspend_lowmem_rx = 0;
 585         }
 586
 587         return result;
 588 }
 589
 590 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth);
 591
 592 /****************************************************************
 593  *     kaweth_usb_receive
 594  ****************************************************************/
 595 static void kaweth_usb_receive(struct urb *urb)
 596 {
 597         struct kaweth_device *kaweth = urb->context;
 598         struct net_device *net = kaweth->net;
 599         int status = urb->status;
 600
 601         int count = urb->actual_length;
 602         int count2 = urb->transfer_buffer_length;
 603
 604         __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf);
 605
 606         struct sk_buff *skb;
 607
 608         if (unlikely(status == -EPIPE)) {
 609                 kaweth->stats.rx_errors++;
 610                 kaweth->end = 1;
 611                 wake_up(&kaweth->term_wait);
 612                 dbg("Status was -EPIPE.");
 613                 return;
 614         }
 615         if (unlikely(status == -ECONNRESET || status == -ESHUTDOWN)) {
 616                 /* we are killed - set a flag and wake the disconnect handler */
 617                 kaweth->end = 1;
 618                 wake_up(&kaweth->term_wait);
 619                 dbg("Status was -ECONNRESET or -ESHUTDOWN.");
 620                 return;
 621         }
 622         if (unlikely(status == -EPROTO || status == -ETIME ||
 623                      status == -EILSEQ)) {
 624                 kaweth->stats.rx_errors++;
 625                 dbg("Status was -EPROTO, -ETIME, or -EILSEQ.");
 626                 return;
 627         }
 628         if (unlikely(status == -EOVERFLOW)) {
 629                 kaweth->stats.rx_errors++;
 630                 dbg("Status was -EOVERFLOW.");
 631         }
 632         spin_lock(&kaweth->device_lock);
 633         if (IS_BLOCKED(kaweth->status)) {
 634                 spin_unlock(&kaweth->device_lock);
 635                 return;
 636         }
 637         spin_unlock(&kaweth->device_lock);
 638
 639         if(status && status != -EREMOTEIO && count != 1) {
 640                 err("%s RX status: %d count: %d packet_len: %d",
 641                            net->name,
 642                            status,
 643                            count,
 644                            (int)pkt_len);
 645                 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 646                 return;
 647         }
 648
 649         if(kaweth->net && (count > 2)) {
 650                 if(pkt_len > (count - 2)) {
 651                         err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count);
 652                         err("Packet len & 2047: %x", pkt_len & 2047);
 653                         err("Count 2: %x", count2);
 654                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 655                         return;
 656                 }
 657
 658                 if(!(skb = dev_alloc_skb(pkt_len+2))) {
 659                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 660                         return;
 661                 }
 662
 663                 skb_reserve(skb, 2);    /* Align IP on 16 byte boundaries */
 664
 665                 skb_copy_to_linear_data(skb, kaweth->rx_buf + 2, pkt_len);
 666
 667                 skb_put(skb, pkt_len);
 668
 669                 skb->protocol = eth_type_trans(skb, net);
 670
 671                 netif_rx(skb);
 672
 673                 kaweth->stats.rx_packets++;
 674                 kaweth->stats.rx_bytes += pkt_len;
 675         }
 676
 677         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
 678 }
 679
 680 /****************************************************************
 681  *     kaweth_open
 682  ****************************************************************/
 683 static int kaweth_open(struct net_device *net)
 684 {
 685         struct kaweth_device *kaweth = netdev_priv(net);
 686         int res;
 687
 688         dbg("Opening network device.");
 689
 690         res = usb_autopm_get_interface(kaweth->intf);
 691         if (res) {
 692                 err("Interface cannot be resumed.");
 693                 return -EIO;
 694         }
 695         res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL);
 696         if (res)
 697                 goto err_out;
 698
 699         usb_fill_int_urb(
 700                 kaweth->irq_urb,
 701                 kaweth->dev,
 702                 usb_rcvintpipe(kaweth->dev, 3),
 703                 kaweth->intbuffer,
 704                 INTBUFFERSIZE,
 705                 int_callback,
 706                 kaweth,
 707                 250); /* overriding the descriptor */
 708         kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle;
 709         kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 710
 711         res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL);
 712         if (res) {
 713                 usb_kill_urb(kaweth->rx_urb);
 714                 goto err_out;
 715         }
 716         kaweth->opened = 1;
 717
 718         netif_start_queue(net);
 719
 720         kaweth_async_set_rx_mode(kaweth);
 721         return 0;
 722
 723 err_out:
 724         usb_autopm_enable(kaweth->intf);
 725         return -EIO;
 726 }
 727
 728 /****************************************************************
 729  *     kaweth_kill_urbs
 730  ****************************************************************/
 731 static void kaweth_kill_urbs(struct kaweth_device *kaweth)
 732 {
 733         usb_kill_urb(kaweth->irq_urb);
 734         usb_kill_urb(kaweth->rx_urb);
 735         usb_kill_urb(kaweth->tx_urb);
 736
 737         cancel_delayed_work_sync(&kaweth->lowmem_work);
 738
 739         /* a scheduled work may have resubmitted,
 740            we hit them again */
 741         usb_kill_urb(kaweth->irq_urb);
 742         usb_kill_urb(kaweth->rx_urb);
 743 }
 744
 745 /****************************************************************
 746  *     kaweth_close
 747  ****************************************************************/
 748 static int kaweth_close(struct net_device *net)
 749 {
 750         struct kaweth_device *kaweth = netdev_priv(net);
 751
 752         netif_stop_queue(net);
 753         kaweth->opened = 0;
 754
 755         kaweth->status |= KAWETH_STATUS_CLOSING;
 756
 757         kaweth_kill_urbs(kaweth);
 758
 759         kaweth->status &= ~KAWETH_STATUS_CLOSING;
 760
 761         usb_autopm_enable(kaweth->intf);
 762
 763         return 0;
 764 }
 765
 766 static void kaweth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
 767 {
 768         struct kaweth_device *kaweth = netdev_priv(dev);
 769
 770         strlcpy(info->driver, driver_name, sizeof(info->driver));
 771         usb_make_path(kaweth->dev, info->bus_info, sizeof (info->bus_info));
 772 }
 773
 774 static u32 kaweth_get_link(struct net_device *dev)
 775 {
 776         struct kaweth_device *kaweth = netdev_priv(dev);
 777
 778         return kaweth->linkstate;
 779 }
 780
 781 static struct ethtool_ops ops = {
 782         .get_drvinfo    = kaweth_get_drvinfo,
 783         .get_link       = kaweth_get_link
 784 };
 785
 786 /****************************************************************
 787  *     kaweth_usb_transmit_complete
 788  ****************************************************************/
 789 static void kaweth_usb_transmit_complete(struct urb *urb)
 790 {
 791         struct kaweth_device *kaweth = urb->context;
 792         struct sk_buff *skb = kaweth->tx_skb;
 793         int status = urb->status;
 794
 795         if (unlikely(status != 0))
 796                 if (status != -ENOENT)
 797                         dbg("%s: TX status %d.", kaweth->net->name, status);
 798
 799         netif_wake_queue(kaweth->net);
 800         dev_kfree_skb_irq(skb);
 801 }
 802
 803 /****************************************************************
 804  *     kaweth_start_xmit
 805  ****************************************************************/
 806 static int kaweth_start_xmit(struct sk_buff *skb, struct net_device *net)
 807 {
 808         struct kaweth_device *kaweth = netdev_priv(net);
 809         __le16 *private_header;
 810
 811         int res;
 812
 813         spin_lock_irq(&kaweth->device_lock);
 814
 815         kaweth_async_set_rx_mode(kaweth);
 816         netif_stop_queue(net);
 817         if (IS_BLOCKED(kaweth->status)) {
 818                 goto skip;
 819         }
 820
 821         /* We now decide whether we can put our special header into the sk_buff */
 822         if (skb_cloned(skb) || skb_headroom(skb) < 2) {
 823                 /* no such luck - we make our own */
 824                 struct sk_buff *copied_skb;
 825                 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC);
 826                 dev_kfree_skb_irq(skb);
 827                 skb = copied_skb;
 828                 if (!copied_skb) {
 829                         kaweth->stats.tx_errors++;
 830                         netif_start_queue(net);
 831                         spin_unlock_irq(&kaweth->device_lock);
 832                         return NETDEV_TX_OK;
 833                 }
 834         }
 835
 836         private_header = (__le16 *)__skb_push(skb, 2);
 837         *private_header = cpu_to_le16(skb->len-2);
 838         kaweth->tx_skb = skb;
 839
 840         usb_fill_bulk_urb(kaweth->tx_urb,
 841                       kaweth->dev,
 842                       usb_sndbulkpipe(kaweth->dev, 2),
 843                       private_header,
 844                       skb->len,
 845                       kaweth_usb_transmit_complete,
 846                       kaweth);
 847         kaweth->end = 0;
 848
 849         if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
 850         {
 851                 dev_warn(&net->dev, "kaweth failed tx_urb %d\n", res);
 852 skip:
 853                 kaweth->stats.tx_errors++;
 854
 855                 netif_start_queue(net);
 856                 dev_kfree_skb_irq(skb);
 857         }
 858         else
 859         {
 860                 kaweth->stats.tx_packets++;
 861                 kaweth->stats.tx_bytes += skb->len;
 862                 net->trans_start = jiffies;
 863         }
 864
 865         spin_unlock_irq(&kaweth->device_lock);
 866
 867         return NETDEV_TX_OK;
 868 }
 869
 870 /****************************************************************
 871  *     kaweth_set_rx_mode
 872  ****************************************************************/
 873 static void kaweth_set_rx_mode(struct net_device *net)
 874 {
 875         struct kaweth_device *kaweth = netdev_priv(net);
 876
 877         __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
 878                                      KAWETH_PACKET_FILTER_BROADCAST |
 879                                      KAWETH_PACKET_FILTER_MULTICAST;
 880
 881         dbg("Setting Rx mode to %d", packet_filter_bitmap);
 882
 883         netif_stop_queue(net);
 884
 885         if (net->flags & IFF_PROMISC) {
 886                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
 887         }
 888         else if ((net->mc_count) || (net->flags & IFF_ALLMULTI)) {
 889                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
 890         }
 891
 892         kaweth->packet_filter_bitmap = packet_filter_bitmap;
 893         netif_wake_queue(net);
 894 }
 895
 896 /****************************************************************
 897  *     kaweth_async_set_rx_mode
 898  ****************************************************************/
 899 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
 900 {
 901         int result;
 902         __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
 903
 904         kaweth->packet_filter_bitmap = 0;
 905         if (packet_filter_bitmap == 0)
 906                 return;
 907
 908         if (in_interrupt())
 909                 return;
 910
 911         result = kaweth_control(kaweth,
 912                                 usb_sndctrlpipe(kaweth->dev, 0),
 913                                 KAWETH_COMMAND_SET_PACKET_FILTER,
 914                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 915                                 packet_filter_bitmap,
 916                                 0,
 917                                 (void *)&kaweth->scratch,
 918                                 0,
 919                                 KAWETH_CONTROL_TIMEOUT);
 920
 921         if(result < 0) {
 922                 err("Failed to set Rx mode: %d", result);
 923         }
 924         else {
 925                 dbg("Set Rx mode to %d", packet_filter_bitmap);
 926         }
 927 }
 928
 929 /****************************************************************
 930  *     kaweth_netdev_stats
 931  ****************************************************************/
 932 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev)
 933 {
 934         struct kaweth_device *kaweth = netdev_priv(dev);
 935         return &kaweth->stats;
 936 }
 937
 938 /****************************************************************
 939  *     kaweth_tx_timeout
 940  ****************************************************************/
 941 static void kaweth_tx_timeout(struct net_device *net)
 942 {
 943         struct kaweth_device *kaweth = netdev_priv(net);
 944
 945         dev_warn(&net->dev, "%s: Tx timed out. Resetting.\n", net->name);
 946         kaweth->stats.tx_errors++;
 947         net->trans_start = jiffies;
 948
 949         usb_unlink_urb(kaweth->tx_urb);
 950 }
 951
 952 /****************************************************************
 953  *     kaweth_suspend
 954  ****************************************************************/
 955 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message)
 956 {
 957         struct kaweth_device *kaweth = usb_get_intfdata(intf);
 958         unsigned long flags;
 959
 960         dbg("Suspending 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         kaweth_kill_urbs(kaweth);
 966         return 0;
 967 }
 968
 969 /****************************************************************
 970  *     kaweth_resume
 971  ****************************************************************/
 972 static int kaweth_resume(struct usb_interface *intf)
 973 {
 974         struct kaweth_device *kaweth = usb_get_intfdata(intf);
 975         unsigned long flags;
 976
 977         dbg("Resuming device");
 978         spin_lock_irqsave(&kaweth->device_lock, flags);
 979         kaweth->status &= ~KAWETH_STATUS_SUSPENDING;
 980         spin_unlock_irqrestore(&kaweth->device_lock, flags);
 981
 982         if (!kaweth->opened)
 983                 return 0;
 984         kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
 985         kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
 986
 987         return 0;
 988 }
 989
 990 /****************************************************************
 991  *     kaweth_probe
 992  ****************************************************************/
 993
 994
 995 static const struct net_device_ops kaweth_netdev_ops = {
 996         .ndo_open =                     kaweth_open,
 997         .ndo_stop =                     kaweth_close,
 998         .ndo_start_xmit =               kaweth_start_xmit,
 999         .ndo_tx_timeout =               kaweth_tx_timeout,
1000         .ndo_set_multicast_list =       kaweth_set_rx_mode,
1001         .ndo_get_stats =                kaweth_netdev_stats,
1002         .ndo_change_mtu =               eth_change_mtu,
1003         .ndo_set_mac_address =          eth_mac_addr,
1004         .ndo_validate_addr =            eth_validate_addr,
1005 };
1006
1007 static int kaweth_probe(
1008                 struct usb_interface *intf,
1009                 const struct usb_device_id *id      /* from id_table */
1010         )
1011 {
1012         struct usb_device *dev = interface_to_usbdev(intf);
1013         struct kaweth_device *kaweth;
1014         struct net_device *netdev;
1015         const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
1016         int result = 0;
1017
1018         dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x",
1019                  dev->devnum,
1020                  le16_to_cpu(dev->descriptor.idVendor),
1021                  le16_to_cpu(dev->descriptor.idProduct),
1022                  le16_to_cpu(dev->descriptor.bcdDevice));
1023
1024         dbg("Device at %p", dev);
1025
1026         dbg("Descriptor length: %x type: %x",
1027                  (int)dev->descriptor.bLength,
1028                  (int)dev->descriptor.bDescriptorType);
1029
1030         netdev = alloc_etherdev(sizeof(*kaweth));
1031         if (!netdev)
1032                 return -ENOMEM;
1033
1034         kaweth = netdev_priv(netdev);
1035         kaweth->dev = dev;
1036         kaweth->net = netdev;
1037
1038         spin_lock_init(&kaweth->device_lock);
1039         init_waitqueue_head(&kaweth->term_wait);
1040
1041         dbg("Resetting.");
1042
1043         kaweth_reset(kaweth);
1044
1045         /*
1046          * If high byte of bcdDevice is nonzero, firmware is already
1047          * downloaded. Don't try to do it again, or we'll hang the device.
1048          */
1049
1050         if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) {
1051                 dev_info(&intf->dev, "Firmware present in device.\n");
1052         } else {
1053                 /* Download the firmware */
1054                 dev_info(&intf->dev, "Downloading firmware...\n");
1055                 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
1056                 if ((result = kaweth_download_firmware(kaweth,
1057                                                       "kaweth/new_code.bin",
1058                                                       100,
1059                                                       2)) < 0) {
1060                         err("Error downloading firmware (%d)", result);
1061                         goto err_fw;
1062                 }
1063
1064                 if ((result = kaweth_download_firmware(kaweth,
1065                                                       "kaweth/new_code_fix.bin",
1066                                                       100,
1067                                                       3)) < 0) {
1068                         err("Error downloading firmware fix (%d)", result);
1069                         goto err_fw;
1070                 }
1071
1072                 if ((result = kaweth_download_firmware(kaweth,
1073                                                       "kaweth/trigger_code.bin",
1074                                                       126,
1075                                                       2)) < 0) {
1076                         err("Error downloading trigger code (%d)", result);
1077                         goto err_fw;
1078
1079                 }
1080
1081                 if ((result = kaweth_download_firmware(kaweth,
1082                                                       "kaweth/trigger_code_fix.bin",
1083                                                       126,
1084                                                       3)) < 0) {
1085                         err("Error downloading trigger code fix (%d)", result);
1086                         goto err_fw;
1087                 }
1088
1089
1090                 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
1091                         err("Error triggering firmware (%d)", result);
1092                         goto err_fw;
1093                 }
1094
1095                 /* Device will now disappear for a moment...  */
1096                 dev_info(&intf->dev, "Firmware loaded.  I'll be back...\n");
1097 err_fw:
1098                 free_page((unsigned long)kaweth->firmware_buf);
1099                 free_netdev(netdev);
1100                 return -EIO;
1101         }
1102
1103         result = kaweth_read_configuration(kaweth);
1104
1105         if(result < 0) {
1106                 err("Error reading configuration (%d), no net device created", result);
1107                 goto err_free_netdev;
1108         }
1109
1110         dev_info(&intf->dev, "Statistics collection: %x\n", kaweth->configuration.statistics_mask);
1111         dev_info(&intf->dev, "Multicast filter limit: %x\n", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
1112         dev_info(&intf->dev, "MTU: %d\n", le16_to_cpu(kaweth->configuration.segment_size));
1113         dev_info(&intf->dev, "Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x\n",
1114                  (int)kaweth->configuration.hw_addr[0],
1115                  (int)kaweth->configuration.hw_addr[1],
1116                  (int)kaweth->configuration.hw_addr[2],
1117                  (int)kaweth->configuration.hw_addr[3],
1118                  (int)kaweth->configuration.hw_addr[4],
1119                  (int)kaweth->configuration.hw_addr[5]);
1120
1121         if(!memcmp(&kaweth->configuration.hw_addr,
1122                    &bcast_addr,
1123                    sizeof(bcast_addr))) {
1124                 err("Firmware not functioning properly, no net device created");
1125                 goto err_free_netdev;
1126         }
1127
1128         if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
1129                 dbg("Error setting URB size");
1130                 goto err_free_netdev;
1131         }
1132
1133         if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
1134                 err("Error setting SOFS wait");
1135                 goto err_free_netdev;
1136         }
1137
1138         result = kaweth_set_receive_filter(kaweth,
1139                                            KAWETH_PACKET_FILTER_DIRECTED |
1140                                            KAWETH_PACKET_FILTER_BROADCAST |
1141                                            KAWETH_PACKET_FILTER_MULTICAST);
1142
1143         if(result < 0) {
1144                 err("Error setting receive filter");
1145                 goto err_free_netdev;
1146         }
1147
1148         dbg("Initializing net device.");
1149
1150         kaweth->intf = intf;
1151
1152         kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1153         if (!kaweth->tx_urb)
1154                 goto err_free_netdev;
1155         kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1156         if (!kaweth->rx_urb)
1157                 goto err_only_tx;
1158         kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1159         if (!kaweth->irq_urb)
1160                 goto err_tx_and_rx;
1161
1162         kaweth->intbuffer = usb_buffer_alloc(   kaweth->dev,
1163                                                 INTBUFFERSIZE,
1164                                                 GFP_KERNEL,
1165                                                 &kaweth->intbufferhandle);
1166         if (!kaweth->intbuffer)
1167                 goto err_tx_and_rx_and_irq;
1168         kaweth->rx_buf = usb_buffer_alloc(      kaweth->dev,
1169                                                 KAWETH_BUF_SIZE,
1170                                                 GFP_KERNEL,
1171                                                 &kaweth->rxbufferhandle);
1172         if (!kaweth->rx_buf)
1173                 goto err_all_but_rxbuf;
1174
1175         memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr));
1176         memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr,
1177                sizeof(kaweth->configuration.hw_addr));
1178
1179         netdev->netdev_ops = &kaweth_netdev_ops;
1180         netdev->watchdog_timeo = KAWETH_TX_TIMEOUT;
1181         netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size);
1182         SET_ETHTOOL_OPS(netdev, &ops);
1183
1184         /* kaweth is zeroed as part of alloc_netdev */
1185         INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl);
1186         usb_set_intfdata(intf, kaweth);
1187
1188 #if 0
1189 // dma_supported() is deeply broken on almost all architectures
1190         if (dma_supported (&intf->dev, 0xffffffffffffffffULL))
1191                 kaweth->net->features |= NETIF_F_HIGHDMA;
1192 #endif
1193
1194         SET_NETDEV_DEV(netdev, &intf->dev);
1195         if (register_netdev(netdev) != 0) {
1196                 err("Error registering netdev.");
1197                 goto err_intfdata;
1198         }
1199
1200         dev_info(&intf->dev, "kaweth interface created at %s\n",
1201                  kaweth->net->name);
1202
1203         dbg("Kaweth probe returning.");
1204
1205         return 0;
1206
1207 err_intfdata:
1208         usb_set_intfdata(intf, NULL);
1209         usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1210 err_all_but_rxbuf:
1211         usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1212 err_tx_and_rx_and_irq:
1213         usb_free_urb(kaweth->irq_urb);
1214 err_tx_and_rx:
1215         usb_free_urb(kaweth->rx_urb);
1216 err_only_tx:
1217         usb_free_urb(kaweth->tx_urb);
1218 err_free_netdev:
1219         free_netdev(netdev);
1220
1221         return -EIO;
1222 }
1223
1224 /****************************************************************
1225  *     kaweth_disconnect
1226  ****************************************************************/
1227 static void kaweth_disconnect(struct usb_interface *intf)
1228 {
1229         struct kaweth_device *kaweth = usb_get_intfdata(intf);
1230         struct net_device *netdev;
1231
1232         dev_info(&intf->dev, "Unregistering\n");
1233
1234         usb_set_intfdata(intf, NULL);
1235         if (!kaweth) {
1236                 dev_warn(&intf->dev, "unregistering non-existant device\n");
1237                 return;
1238         }
1239         netdev = kaweth->net;
1240
1241         dbg("Unregistering net device");
1242         unregister_netdev(netdev);
1243
1244         usb_free_urb(kaweth->rx_urb);
1245         usb_free_urb(kaweth->tx_urb);
1246         usb_free_urb(kaweth->irq_urb);
1247
1248         usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1249         usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1250
1251         free_netdev(netdev);
1252 }
1253
1254
1255 // FIXME this completion stuff is a modified clone of
1256 // an OLD version of some stuff in usb.c ...
1257 struct usb_api_data {
1258         wait_queue_head_t wqh;
1259         int done;
1260 };
1261
1262 /*-------------------------------------------------------------------*
1263  * completion handler for compatibility wrappers (sync control/bulk) *
1264  *-------------------------------------------------------------------*/
1265 static void usb_api_blocking_completion(struct urb *urb)
1266 {
1267         struct usb_api_data *awd = (struct usb_api_data *)urb->context;
1268
1269         awd->done=1;
1270         wake_up(&awd->wqh);
1271 }
1272
1273 /*-------------------------------------------------------------------*
1274  *                         COMPATIBILITY STUFF                       *
1275  *-------------------------------------------------------------------*/
1276
1277 // Starts urb and waits for completion or timeout
1278 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
1279 {
1280         struct usb_api_data awd;
1281         int status;
1282
1283         init_waitqueue_head(&awd.wqh);
1284         awd.done = 0;
1285
1286         urb->context = &awd;
1287         status = usb_submit_urb(urb, GFP_NOIO);
1288         if (status) {
1289                 // something went wrong
1290                 usb_free_urb(urb);
1291                 return status;
1292         }
1293
1294         if (!wait_event_timeout(awd.wqh, awd.done, timeout)) {
1295                 // timeout
1296                 dev_warn(&urb->dev->dev, "usb_control/bulk_msg: timeout\n");
1297                 usb_kill_urb(urb);  // remove urb safely
1298                 status = -ETIMEDOUT;
1299         }
1300         else {
1301                 status = urb->status;
1302         }
1303
1304         if (actual_length) {
1305                 *actual_length = urb->actual_length;
1306         }
1307
1308         usb_free_urb(urb);
1309         return status;
1310 }
1311
1312 /*-------------------------------------------------------------------*/
1313 // returns status (negative) or length (positive)
1314 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
1315                                        unsigned int pipe,
1316                                        struct usb_ctrlrequest *cmd, void *data,
1317                                        int len, int timeout)
1318 {
1319         struct urb *urb;
1320         int retv;
1321         int length = 0; /* shut up GCC */
1322
1323         urb = usb_alloc_urb(0, GFP_NOIO);
1324         if (!urb)
1325                 return -ENOMEM;
1326
1327         usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data,
1328                          len, usb_api_blocking_completion, NULL);
1329
1330         retv = usb_start_wait_urb(urb, timeout, &length);
1331         if (retv < 0) {
1332                 return retv;
1333         }
1334         else {
1335                 return length;
1336         }
1337 }
1338
1339
1340 /****************************************************************
1341  *     kaweth_init
1342  ****************************************************************/
1343 static int __init kaweth_init(void)
1344 {
1345         dbg("Driver loading");
1346         return usb_register(&kaweth_driver);
1347 }
1348
1349 /****************************************************************
1350  *     kaweth_exit
1351  ****************************************************************/
1352 static void __exit kaweth_exit(void)
1353 {
1354         usb_deregister(&kaweth_driver);
1355 }
1356
1357 module_init(kaweth_init);
1358 module_exit(kaweth_exit);
1359
1360
1361
1362
1363
1364
1365
1366
1367