drivers/net/irda/kingsun-sir.c

   1 /*****************************************************************************
   2 *
   3 * Filename:      kingsun-sir.c
   4 * Version:       0.1.1
   5 * Description:   Irda KingSun/DonShine USB Dongle
   6 * Status:        Experimental
   7 * Author:        Alex Villacís Lasso <a_villacis@palosanto.com>
   8 *
   9 *       Based on stir4200 and mcs7780 drivers, with (strange?) differences
  10 *
  11 *       This program is free software; you can redistribute it and/or modify
  12 *       it under the terms of the GNU General Public License as published by
  13 *       the Free Software Foundation; either version 2 of the License.
  14 *
  15 *       This program is distributed in the hope that it will be useful,
  16 *       but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 *       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 *       GNU General Public License for more details.
  19 *
  20 *       You should have received a copy of the GNU General Public License
  21 *       along with this program; if not, write to the Free Software
  22 *       Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23 *
  24 *****************************************************************************/
  25
  26 /*
  27  * This is my current (2007-04-25) understanding of how this dongle is supposed
  28  * to work. This is based on reverse-engineering and examination of the packet
  29  * data sent and received by the WinXP driver using USBSnoopy. Feel free to
  30  * update here as more of this dongle is known:
  31  *
  32  * General: Unlike the other USB IrDA dongles, this particular dongle exposes,
  33  * not two bulk (in and out) endpoints, but two *interrupt* ones. This dongle,
  34  * like the bulk based ones (stir4200.c and mcs7780.c), requires polling in
  35  * order to receive data.
  36  * Transmission: Just like stir4200, this dongle uses a raw stream of data,
  37  * which needs to be wrapped and escaped in a similar way as in stir4200.c.
  38  * Reception: Poll-based, as in stir4200. Each read returns the contents of a
  39  * 8-byte buffer, of which the first byte (LSB) indicates the number of bytes
  40  * (1-7) of valid data contained within the remaining 7 bytes. For example, if
  41  * the buffer had the following contents:
  42  *  06 ff ff ff c0 01 04 aa
  43  * This means that (06) there are 6 bytes of valid data. The byte 0xaa at the
  44  * end is garbage (left over from a previous reception) and is discarded.
  45  * If a read returns an "impossible" value as the length of valid data (such as
  46  * 0x36) in the first byte, then the buffer is uninitialized (as is the case of
  47  * first plug-in) and its contents should be discarded. There is currently no
  48  * evidence that the top 5 bits of the 1st byte of the buffer can have values
  49  * other than 0 once reception begins.
  50  * Once valid bytes are collected, the assembled stream is a sequence of
  51  * wrapped IrDA frames that is unwrapped and unescaped as in stir4200.c.
  52  * BIG FAT WARNING: the dongle does *not* reset the RX buffer in any way after
  53  * a successful read from the host, which means that in absence of further
  54  * reception, repeated reads from the dongle will return the exact same
  55  * contents repeatedly. Attempts to be smart and cache a previous read seem
  56  * to result in corrupted packets, so this driver depends on the unwrap logic
  57  * to sort out any repeated reads.
  58  * Speed change: no commands observed so far to change speed, assumed fixed
  59  * 9600bps (SIR).
  60  */
  61
  62 #include <linux/module.h>
  63 #include <linux/moduleparam.h>
  64 #include <linux/kernel.h>
  65 #include <linux/types.h>
  66 #include <linux/errno.h>
  67 #include <linux/slab.h>
  68 #include <linux/usb.h>
  69 #include <linux/device.h>
  70 #include <linux/crc32.h>
  71
  72 #include <asm/unaligned.h>
  73 #include <asm/byteorder.h>
  74 #include <asm/uaccess.h>
  75
  76 #include <net/irda/irda.h>
  77 #include <net/irda/wrapper.h>
  78 #include <net/irda/crc.h>
  79
  80 /*
  81  * According to lsusb, 0x07c0 is assigned to
  82  * "Code Mercenaries Hard- und Software GmbH"
  83  */
  84 #define KING_VENDOR_ID 0x07c0
  85 #define KING_PRODUCT_ID 0x4200
  86
  87 /* These are the currently known USB ids */
  88 static struct usb_device_id dongles[] = {
  89     /* KingSun Co,Ltd  IrDA/USB Bridge */
  90     { USB_DEVICE(KING_VENDOR_ID, KING_PRODUCT_ID) },
  91     { }
  92 };
  93
  94 MODULE_DEVICE_TABLE(usb, dongles);
  95
  96 #define KINGSUN_MTT 0x07
  97
  98 #define KINGSUN_FIFO_SIZE               4096
  99 #define KINGSUN_EP_IN                   0
 100 #define KINGSUN_EP_OUT                  1
 101
 102 struct kingsun_cb {
 103         struct usb_device *usbdev;      /* init: probe_irda */
 104         struct net_device *netdev;      /* network layer */
 105         struct irlap_cb   *irlap;       /* The link layer we are binded to */
 106
 107         struct qos_info   qos;
 108
 109         __u8              *in_buf;      /* receive buffer */
 110         __u8              *out_buf;     /* transmit buffer */
 111         __u8              max_rx;       /* max. atomic read from dongle
 112                                            (usually 8), also size of in_buf */
 113         __u8              max_tx;       /* max. atomic write to dongle
 114                                            (usually 8) */
 115
 116         iobuff_t          rx_buff;      /* receive unwrap state machine */
 117         struct timeval    rx_time;
 118         spinlock_t lock;
 119         int receiving;
 120
 121         __u8 ep_in;
 122         __u8 ep_out;
 123
 124         struct urb       *tx_urb;
 125         struct urb       *rx_urb;
 126 };
 127
 128 /* Callback transmission routine */
 129 static void kingsun_send_irq(struct urb *urb)
 130 {
 131         struct kingsun_cb *kingsun = urb->context;
 132         struct net_device *netdev = kingsun->netdev;
 133
 134         /* in process of stopping, just drop data */
 135         if (!netif_running(kingsun->netdev)) {
 136                 dev_err(&kingsun->usbdev->dev,
 137                         "kingsun_send_irq: Network not running!\n");
 138                 return;
 139         }
 140
 141         /* unlink, shutdown, unplug, other nasties */
 142         if (urb->status != 0) {
 143                 dev_err(&kingsun->usbdev->dev,
 144                         "kingsun_send_irq: urb asynchronously failed - %d\n",
 145                         urb->status);
 146         }
 147         netif_wake_queue(netdev);
 148 }
 149
 150 /*
 151  * Called from net/core when new frame is available.
 152  */
 153 static netdev_tx_t kingsun_hard_xmit(struct sk_buff *skb,
 154                                            struct net_device *netdev)
 155 {
 156         struct kingsun_cb *kingsun;
 157         int wraplen;
 158         int ret = 0;
 159
 160         netif_stop_queue(netdev);
 161
 162         /* the IRDA wrapping routines don't deal with non linear skb */
 163         SKB_LINEAR_ASSERT(skb);
 164
 165         kingsun = netdev_priv(netdev);
 166
 167         spin_lock(&kingsun->lock);
 168
 169         /* Append data to the end of whatever data remains to be transmitted */
 170         wraplen = async_wrap_skb(skb,
 171                 kingsun->out_buf,
 172                 KINGSUN_FIFO_SIZE);
 173
 174         /* Calculate how much data can be transmitted in this urb */
 175         usb_fill_int_urb(kingsun->tx_urb, kingsun->usbdev,
 176                 usb_sndintpipe(kingsun->usbdev, kingsun->ep_out),
 177                 kingsun->out_buf, wraplen, kingsun_send_irq,
 178                 kingsun, 1);
 179
 180         if ((ret = usb_submit_urb(kingsun->tx_urb, GFP_ATOMIC))) {
 181                 dev_err(&kingsun->usbdev->dev,
 182                         "kingsun_hard_xmit: failed tx_urb submit: %d\n", ret);
 183                 switch (ret) {
 184                 case -ENODEV:
 185                 case -EPIPE:
 186                         break;
 187                 default:
 188                         netdev->stats.tx_errors++;
 189                         netif_start_queue(netdev);
 190                 }
 191         } else {
 192                 netdev->stats.tx_packets++;
 193                 netdev->stats.tx_bytes += skb->len;
 194         }
 195
 196         dev_kfree_skb(skb);
 197         spin_unlock(&kingsun->lock);
 198
 199         return NETDEV_TX_OK;
 200 }
 201
 202 /* Receive callback function */
 203 static void kingsun_rcv_irq(struct urb *urb)
 204 {
 205         struct kingsun_cb *kingsun = urb->context;
 206         int ret;
 207
 208         /* in process of stopping, just drop data */
 209         if (!netif_running(kingsun->netdev)) {
 210                 kingsun->receiving = 0;
 211                 return;
 212         }
 213
 214         /* unlink, shutdown, unplug, other nasties */
 215         if (urb->status != 0) {
 216                 dev_err(&kingsun->usbdev->dev,
 217                         "kingsun_rcv_irq: urb asynchronously failed - %d\n",
 218                         urb->status);
 219                 kingsun->receiving = 0;
 220                 return;
 221         }
 222
 223         if (urb->actual_length == kingsun->max_rx) {
 224                 __u8 *bytes = urb->transfer_buffer;
 225                 int i;
 226
 227                 /* The very first byte in the buffer indicates the length of
 228                    valid data in the read. This byte must be in the range
 229                    1..kingsun->max_rx -1 . Values outside this range indicate
 230                    an uninitialized Rx buffer when the dongle has just been
 231                    plugged in. */
 232                 if (bytes[0] >= 1 && bytes[0] < kingsun->max_rx) {
 233                         for (i = 1; i <= bytes[0]; i++) {
 234                                 async_unwrap_char(kingsun->netdev,
 235                                                   &kingsun->netdev->stats,
 236                                                   &kingsun->rx_buff, bytes[i]);
 237                         }
 238                         do_gettimeofday(&kingsun->rx_time);
 239                         kingsun->receiving =
 240                                 (kingsun->rx_buff.state != OUTSIDE_FRAME)
 241                                 ? 1 : 0;
 242                 }
 243         } else if (urb->actual_length > 0) {
 244                 dev_err(&kingsun->usbdev->dev,
 245                         "%s(): Unexpected response length, expected %d got %d\n",
 246                         __func__, kingsun->max_rx, urb->actual_length);
 247         }
 248         /* This urb has already been filled in kingsun_net_open */
 249         ret = usb_submit_urb(urb, GFP_ATOMIC);
 250 }
 251
 252 /*
 253  * Function kingsun_net_open (dev)
 254  *
 255  *    Network device is taken up. Usually this is done by "ifconfig irda0 up"
 256  */
 257 static int kingsun_net_open(struct net_device *netdev)
 258 {
 259         struct kingsun_cb *kingsun = netdev_priv(netdev);
 260         int err = -ENOMEM;
 261         char hwname[16];
 262
 263         /* At this point, urbs are NULL, and skb is NULL (see kingsun_probe) */
 264         kingsun->receiving = 0;
 265
 266         /* Initialize for SIR to copy data directly into skb.  */
 267         kingsun->rx_buff.in_frame = FALSE;
 268         kingsun->rx_buff.state = OUTSIDE_FRAME;
 269         kingsun->rx_buff.truesize = IRDA_SKB_MAX_MTU;
 270         kingsun->rx_buff.skb = dev_alloc_skb(IRDA_SKB_MAX_MTU);
 271         if (!kingsun->rx_buff.skb)
 272                 goto free_mem;
 273
 274         skb_reserve(kingsun->rx_buff.skb, 1);
 275         kingsun->rx_buff.head = kingsun->rx_buff.skb->data;
 276         do_gettimeofday(&kingsun->rx_time);
 277
 278         kingsun->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 279         if (!kingsun->rx_urb)
 280                 goto free_mem;
 281
 282         kingsun->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 283         if (!kingsun->tx_urb)
 284                 goto free_mem;
 285
 286         /*
 287          * Now that everything should be initialized properly,
 288          * Open new IrLAP layer instance to take care of us...
 289          */
 290         sprintf(hwname, "usb#%d", kingsun->usbdev->devnum);
 291         kingsun->irlap = irlap_open(netdev, &kingsun->qos, hwname);
 292         if (!kingsun->irlap) {
 293                 dev_err(&kingsun->usbdev->dev, "irlap_open failed\n");
 294                 goto free_mem;
 295         }
 296
 297         /* Start first reception */
 298         usb_fill_int_urb(kingsun->rx_urb, kingsun->usbdev,
 299                           usb_rcvintpipe(kingsun->usbdev, kingsun->ep_in),
 300                           kingsun->in_buf, kingsun->max_rx,
 301                           kingsun_rcv_irq, kingsun, 1);
 302         kingsun->rx_urb->status = 0;
 303         err = usb_submit_urb(kingsun->rx_urb, GFP_KERNEL);
 304         if (err) {
 305                 dev_err(&kingsun->usbdev->dev,
 306                         "first urb-submit failed: %d\n", err);
 307                 goto close_irlap;
 308         }
 309
 310         netif_start_queue(netdev);
 311
 312         /* Situation at this point:
 313            - all work buffers allocated
 314            - urbs allocated and ready to fill
 315            - max rx packet known (in max_rx)
 316            - unwrap state machine initialized, in state outside of any frame
 317            - receive request in progress
 318            - IrLAP layer started, about to hand over packets to send
 319          */
 320
 321         return 0;
 322
 323  close_irlap:
 324         irlap_close(kingsun->irlap);
 325  free_mem:
 326         if (kingsun->tx_urb) {
 327                 usb_free_urb(kingsun->tx_urb);
 328                 kingsun->tx_urb = NULL;
 329         }
 330         if (kingsun->rx_urb) {
 331                 usb_free_urb(kingsun->rx_urb);
 332                 kingsun->rx_urb = NULL;
 333         }
 334         if (kingsun->rx_buff.skb) {
 335                 kfree_skb(kingsun->rx_buff.skb);
 336                 kingsun->rx_buff.skb = NULL;
 337                 kingsun->rx_buff.head = NULL;
 338         }
 339         return err;
 340 }
 341
 342 /*
 343  * Function kingsun_net_close (kingsun)
 344  *
 345  *    Network device is taken down. Usually this is done by
 346  *    "ifconfig irda0 down"
 347  */
 348 static int kingsun_net_close(struct net_device *netdev)
 349 {
 350         struct kingsun_cb *kingsun = netdev_priv(netdev);
 351
 352         /* Stop transmit processing */
 353         netif_stop_queue(netdev);
 354
 355         /* Mop up receive && transmit urb's */
 356         usb_kill_urb(kingsun->tx_urb);
 357         usb_kill_urb(kingsun->rx_urb);
 358
 359         usb_free_urb(kingsun->tx_urb);
 360         usb_free_urb(kingsun->rx_urb);
 361
 362         kingsun->tx_urb = NULL;
 363         kingsun->rx_urb = NULL;
 364
 365         kfree_skb(kingsun->rx_buff.skb);
 366         kingsun->rx_buff.skb = NULL;
 367         kingsun->rx_buff.head = NULL;
 368         kingsun->rx_buff.in_frame = FALSE;
 369         kingsun->rx_buff.state = OUTSIDE_FRAME;
 370         kingsun->receiving = 0;
 371
 372         /* Stop and remove instance of IrLAP */
 373         if (kingsun->irlap)
 374                 irlap_close(kingsun->irlap);
 375
 376         kingsun->irlap = NULL;
 377
 378         return 0;
 379 }
 380
 381 /*
 382  * IOCTLs : Extra out-of-band network commands...
 383  */
 384 static int kingsun_net_ioctl(struct net_device *netdev, struct ifreq *rq,
 385                              int cmd)
 386 {
 387         struct if_irda_req *irq = (struct if_irda_req *) rq;
 388         struct kingsun_cb *kingsun = netdev_priv(netdev);
 389         int ret = 0;
 390
 391         switch (cmd) {
 392         case SIOCSBANDWIDTH: /* Set bandwidth */
 393                 if (!capable(CAP_NET_ADMIN))
 394                         return -EPERM;
 395
 396                 /* Check if the device is still there */
 397                 if (netif_device_present(kingsun->netdev))
 398                         /* No observed commands for speed change */
 399                         ret = -EOPNOTSUPP;
 400                 break;
 401
 402         case SIOCSMEDIABUSY: /* Set media busy */
 403                 if (!capable(CAP_NET_ADMIN))
 404                         return -EPERM;
 405
 406                 /* Check if the IrDA stack is still there */
 407                 if (netif_running(kingsun->netdev))
 408                         irda_device_set_media_busy(kingsun->netdev, TRUE);
 409                 break;
 410
 411         case SIOCGRECEIVING:
 412                 /* Only approximately true */
 413                 irq->ifr_receiving = kingsun->receiving;
 414                 break;
 415
 416         default:
 417                 ret = -EOPNOTSUPP;
 418         }
 419
 420         return ret;
 421 }
 422
 423 static const struct net_device_ops kingsun_ops = {
 424         .ndo_start_xmit      = kingsun_hard_xmit,
 425         .ndo_open            = kingsun_net_open,
 426         .ndo_stop            = kingsun_net_close,
 427         .ndo_do_ioctl        = kingsun_net_ioctl,
 428 };
 429
 430 /*
 431  * This routine is called by the USB subsystem for each new device
 432  * in the system. We need to check if the device is ours, and in
 433  * this case start handling it.
 434  */
 435 static int kingsun_probe(struct usb_interface *intf,
 436                       const struct usb_device_id *id)
 437 {
 438         struct usb_host_interface *interface;
 439         struct usb_endpoint_descriptor *endpoint;
 440
 441         struct usb_device *dev = interface_to_usbdev(intf);
 442         struct kingsun_cb *kingsun = NULL;
 443         struct net_device *net = NULL;
 444         int ret = -ENOMEM;
 445         int pipe, maxp_in, maxp_out;
 446         __u8 ep_in;
 447         __u8 ep_out;
 448
 449         /* Check that there really are two interrupt endpoints.
 450            Check based on the one in drivers/usb/input/usbmouse.c
 451          */
 452         interface = intf->cur_altsetting;
 453         if (interface->desc.bNumEndpoints != 2) {
 454                 dev_err(&intf->dev,
 455                         "kingsun-sir: expected 2 endpoints, found %d\n",
 456                         interface->desc.bNumEndpoints);
 457                 return -ENODEV;
 458         }
 459         endpoint = &interface->endpoint[KINGSUN_EP_IN].desc;
 460         if (!usb_endpoint_is_int_in(endpoint)) {
 461                 dev_err(&intf->dev,
 462                         "kingsun-sir: endpoint 0 is not interrupt IN\n");
 463                 return -ENODEV;
 464         }
 465
 466         ep_in = endpoint->bEndpointAddress;
 467         pipe = usb_rcvintpipe(dev, ep_in);
 468         maxp_in = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
 469         if (maxp_in > 255 || maxp_in <= 1) {
 470                 dev_err(&intf->dev,
 471                         "endpoint 0 has max packet size %d not in range\n",
 472                         maxp_in);
 473                 return -ENODEV;
 474         }
 475
 476         endpoint = &interface->endpoint[KINGSUN_EP_OUT].desc;
 477         if (!usb_endpoint_is_int_out(endpoint)) {
 478                 dev_err(&intf->dev,
 479                         "kingsun-sir: endpoint 1 is not interrupt OUT\n");
 480                 return -ENODEV;
 481         }
 482
 483         ep_out = endpoint->bEndpointAddress;
 484         pipe = usb_sndintpipe(dev, ep_out);
 485         maxp_out = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
 486
 487         /* Allocate network device container. */
 488         net = alloc_irdadev(sizeof(*kingsun));
 489         if(!net)
 490                 goto err_out1;
 491
 492         SET_NETDEV_DEV(net, &intf->dev);
 493         kingsun = netdev_priv(net);
 494         kingsun->irlap = NULL;
 495         kingsun->tx_urb = NULL;
 496         kingsun->rx_urb = NULL;
 497         kingsun->ep_in = ep_in;
 498         kingsun->ep_out = ep_out;
 499         kingsun->in_buf = NULL;
 500         kingsun->out_buf = NULL;
 501         kingsun->max_rx = (__u8)maxp_in;
 502         kingsun->max_tx = (__u8)maxp_out;
 503         kingsun->netdev = net;
 504         kingsun->usbdev = dev;
 505         kingsun->rx_buff.in_frame = FALSE;
 506         kingsun->rx_buff.state = OUTSIDE_FRAME;
 507         kingsun->rx_buff.skb = NULL;
 508         kingsun->receiving = 0;
 509         spin_lock_init(&kingsun->lock);
 510
 511         /* Allocate input buffer */
 512         kingsun->in_buf = kmalloc(kingsun->max_rx, GFP_KERNEL);
 513         if (!kingsun->in_buf)
 514                 goto free_mem;
 515
 516         /* Allocate output buffer */
 517         kingsun->out_buf = kmalloc(KINGSUN_FIFO_SIZE, GFP_KERNEL);
 518         if (!kingsun->out_buf)
 519                 goto free_mem;
 520
 521         printk(KERN_INFO "KingSun/DonShine IRDA/USB found at address %d, "
 522                 "Vendor: %x, Product: %x\n",
 523                dev->devnum, le16_to_cpu(dev->descriptor.idVendor),
 524                le16_to_cpu(dev->descriptor.idProduct));
 525
 526         /* Initialize QoS for this device */
 527         irda_init_max_qos_capabilies(&kingsun->qos);
 528
 529         /* That's the Rx capability. */
 530         kingsun->qos.baud_rate.bits       &= IR_9600;
 531         kingsun->qos.min_turn_time.bits   &= KINGSUN_MTT;
 532         irda_qos_bits_to_value(&kingsun->qos);
 533
 534         /* Override the network functions we need to use */
 535         net->netdev_ops = &kingsun_ops;
 536
 537         ret = register_netdev(net);
 538         if (ret != 0)
 539                 goto free_mem;
 540
 541         dev_info(&net->dev, "IrDA: Registered KingSun/DonShine device %s\n",
 542                  net->name);
 543
 544         usb_set_intfdata(intf, kingsun);
 545
 546         /* Situation at this point:
 547            - all work buffers allocated
 548            - urbs not allocated, set to NULL
 549            - max rx packet known (in max_rx)
 550            - unwrap state machine (partially) initialized, but skb == NULL
 551          */
 552
 553         return 0;
 554
 555 free_mem:
 556         kfree(kingsun->out_buf);
 557         kfree(kingsun->in_buf);
 558         free_netdev(net);
 559 err_out1:
 560         return ret;
 561 }
 562
 563 /*
 564  * The current device is removed, the USB layer tell us to shut it down...
 565  */
 566 static void kingsun_disconnect(struct usb_interface *intf)
 567 {
 568         struct kingsun_cb *kingsun = usb_get_intfdata(intf);
 569
 570         if (!kingsun)
 571                 return;
 572
 573         unregister_netdev(kingsun->netdev);
 574
 575         /* Mop up receive && transmit urb's */
 576         if (kingsun->tx_urb != NULL) {
 577                 usb_kill_urb(kingsun->tx_urb);
 578                 usb_free_urb(kingsun->tx_urb);
 579                 kingsun->tx_urb = NULL;
 580         }
 581         if (kingsun->rx_urb != NULL) {
 582                 usb_kill_urb(kingsun->rx_urb);
 583                 usb_free_urb(kingsun->rx_urb);
 584                 kingsun->rx_urb = NULL;
 585         }
 586
 587         kfree(kingsun->out_buf);
 588         kfree(kingsun->in_buf);
 589         free_netdev(kingsun->netdev);
 590
 591         usb_set_intfdata(intf, NULL);
 592 }
 593
 594 #ifdef CONFIG_PM
 595 /* USB suspend, so power off the transmitter/receiver */
 596 static int kingsun_suspend(struct usb_interface *intf, pm_message_t message)
 597 {
 598         struct kingsun_cb *kingsun = usb_get_intfdata(intf);
 599
 600         netif_device_detach(kingsun->netdev);
 601         if (kingsun->tx_urb != NULL) usb_kill_urb(kingsun->tx_urb);
 602         if (kingsun->rx_urb != NULL) usb_kill_urb(kingsun->rx_urb);
 603         return 0;
 604 }
 605
 606 /* Coming out of suspend, so reset hardware */
 607 static int kingsun_resume(struct usb_interface *intf)
 608 {
 609         struct kingsun_cb *kingsun = usb_get_intfdata(intf);
 610
 611         if (kingsun->rx_urb != NULL)
 612                 usb_submit_urb(kingsun->rx_urb, GFP_KERNEL);
 613         netif_device_attach(kingsun->netdev);
 614
 615         return 0;
 616 }
 617 #endif
 618
 619 /*
 620  * USB device callbacks
 621  */
 622 static struct usb_driver irda_driver = {
 623         .name           = "kingsun-sir",
 624         .probe          = kingsun_probe,
 625         .disconnect     = kingsun_disconnect,
 626         .id_table       = dongles,
 627 #ifdef CONFIG_PM
 628         .suspend        = kingsun_suspend,
 629         .resume         = kingsun_resume,
 630 #endif
 631 };
 632
 633 module_usb_driver(irda_driver);
 634
 635 MODULE_AUTHOR("Alex Villacís Lasso <a_villacis@palosanto.com>");
 636 MODULE_DESCRIPTION("IrDA-USB Dongle Driver for KingSun/DonShine");
 637 MODULE_LICENSE("GPL");