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/init.h>
  68 #include <linux/slab.h>
  69 #include <linux/kref.h>
  70 #include <linux/usb.h>
  71 #include <linux/device.h>
  72 #include <linux/crc32.h>
  73
  74 #include <asm/unaligned.h>
  75 #include <asm/byteorder.h>
  76 #include <asm/uaccess.h>
  77
  78 #include <net/irda/irda.h>
  79 #include <net/irda/wrapper.h>
  80 #include <net/irda/crc.h>
  81
  82 /*
  83  * According to lsusb, 0x07c0 is assigned to
  84  * "Code Mercenaries Hard- und Software GmbH"
  85  */
  86 #define KING_VENDOR_ID 0x07c0
  87 #define KING_PRODUCT_ID 0x4200
  88
  89 /* These are the currently known USB ids */
  90 static struct usb_device_id dongles[] = {
  91     /* KingSun Co,Ltd  IrDA/USB Bridge */
  92     { USB_DEVICE(KING_VENDOR_ID, KING_PRODUCT_ID) },
  93     { }
  94 };
  95
  96 MODULE_DEVICE_TABLE(usb, dongles);
  97
  98 #define KINGSUN_MTT 0x07
  99
 100 #define KINGSUN_FIFO_SIZE               4096
 101 #define KINGSUN_EP_IN                   0
 102 #define KINGSUN_EP_OUT                  1
 103
 104 struct kingsun_cb {
 105         struct usb_device *usbdev;      /* init: probe_irda */
 106         struct net_device *netdev;      /* network layer */
 107         struct irlap_cb   *irlap;       /* The link layer we are binded to */
 108         struct net_device_stats stats;  /* network statistics */
 109         struct qos_info   qos;
 110
 111         __u8              *in_buf;      /* receive buffer */
 112         __u8              *out_buf;     /* transmit buffer */
 113         __u8              max_rx;       /* max. atomic read from dongle
 114                                            (usually 8), also size of in_buf */
 115         __u8              max_tx;       /* max. atomic write to dongle
 116                                            (usually 8) */
 117
 118         iobuff_t          rx_buff;      /* receive unwrap state machine */
 119         struct timeval    rx_time;
 120         spinlock_t lock;
 121         int receiving;
 122
 123         __u8 ep_in;
 124         __u8 ep_out;
 125
 126         struct urb       *tx_urb;
 127         struct urb       *rx_urb;
 128 };
 129
 130 /* Callback transmission routine */
 131 static void kingsun_send_irq(struct urb *urb)
 132 {
 133         struct kingsun_cb *kingsun = urb->context;
 134         struct net_device *netdev = kingsun->netdev;
 135
 136         /* in process of stopping, just drop data */
 137         if (!netif_running(kingsun->netdev)) {
 138                 err("kingsun_send_irq: Network not running!");
 139                 return;
 140         }
 141
 142         /* unlink, shutdown, unplug, other nasties */
 143         if (urb->status != 0) {
 144                 err("kingsun_send_irq: urb asynchronously failed - %d",
 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 int kingsun_hard_xmit(struct sk_buff *skb, struct net_device *netdev)
 154 {
 155         struct kingsun_cb *kingsun;
 156         int wraplen;
 157         int ret = 0;
 158
 159         if (skb == NULL || netdev == NULL)
 160                 return -EINVAL;
 161
 162         netif_stop_queue(netdev);
 163
 164         /* the IRDA wrapping routines don't deal with non linear skb */
 165         SKB_LINEAR_ASSERT(skb);
 166
 167         kingsun = netdev_priv(netdev);
 168
 169         spin_lock(&kingsun->lock);
 170
 171         /* Append data to the end of whatever data remains to be transmitted */
 172         wraplen = async_wrap_skb(skb,
 173                 kingsun->out_buf,
 174                 KINGSUN_FIFO_SIZE);
 175
 176         /* Calculate how much data can be transmitted in this urb */
 177         usb_fill_int_urb(kingsun->tx_urb, kingsun->usbdev,
 178                 usb_sndintpipe(kingsun->usbdev, kingsun->ep_out),
 179                 kingsun->out_buf, wraplen, kingsun_send_irq,
 180                 kingsun, 1);
 181
 182         if ((ret = usb_submit_urb(kingsun->tx_urb, GFP_ATOMIC))) {
 183                 err("kingsun_hard_xmit: failed tx_urb submit: %d", ret);
 184                 switch (ret) {
 185                 case -ENODEV:
 186                 case -EPIPE:
 187                         break;
 188                 default:
 189                         kingsun->stats.tx_errors++;
 190                         netif_start_queue(netdev);
 191                 }
 192         } else {
 193                 kingsun->stats.tx_packets++;
 194                 kingsun->stats.tx_bytes += skb->len;
 195         }
 196
 197         dev_kfree_skb(skb);
 198         spin_unlock(&kingsun->lock);
 199
 200         return ret;
 201 }
 202
 203 /* Receive callback function */
 204 static void kingsun_rcv_irq(struct urb *urb)
 205 {
 206         struct kingsun_cb *kingsun = urb->context;
 207         int ret;
 208
 209         /* in process of stopping, just drop data */
 210         if (!netif_running(kingsun->netdev)) {
 211                 kingsun->receiving = 0;
 212                 return;
 213         }
 214
 215         /* unlink, shutdown, unplug, other nasties */
 216         if (urb->status != 0) {
 217                 err("kingsun_rcv_irq: urb asynchronously failed - %d",
 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->stats,
 236                                                   &kingsun->rx_buff, bytes[i]);
 237                         }
 238                         kingsun->netdev->last_rx = jiffies;
 239                         do_gettimeofday(&kingsun->rx_time);
 240                         kingsun->receiving =
 241                                 (kingsun->rx_buff.state != OUTSIDE_FRAME)
 242                                 ? 1 : 0;
 243                 }
 244         } else if (urb->actual_length > 0) {
 245                 err("%s(): Unexpected response length, expected %d got %d",
 246                     __FUNCTION__, 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                 err("kingsun-sir: irlap_open failed");
 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                 err("kingsun-sir: first urb-submit failed: %d", err);
 306                 goto close_irlap;
 307         }
 308
 309         netif_start_queue(netdev);
 310
 311         /* Situation at this point:
 312            - all work buffers allocated
 313            - urbs allocated and ready to fill
 314            - max rx packet known (in max_rx)
 315            - unwrap state machine initialized, in state outside of any frame
 316            - receive request in progress
 317            - IrLAP layer started, about to hand over packets to send
 318          */
 319
 320         return 0;
 321
 322  close_irlap:
 323         irlap_close(kingsun->irlap);
 324  free_mem:
 325         if (kingsun->tx_urb) {
 326                 usb_free_urb(kingsun->tx_urb);
 327                 kingsun->tx_urb = NULL;
 328         }
 329         if (kingsun->rx_urb) {
 330                 usb_free_urb(kingsun->rx_urb);
 331                 kingsun->rx_urb = NULL;
 332         }
 333         if (kingsun->rx_buff.skb) {
 334                 kfree_skb(kingsun->rx_buff.skb);
 335                 kingsun->rx_buff.skb = NULL;
 336                 kingsun->rx_buff.head = NULL;
 337         }
 338         return err;
 339 }
 340
 341 /*
 342  * Function kingsun_net_close (kingsun)
 343  *
 344  *    Network device is taken down. Usually this is done by
 345  *    "ifconfig irda0 down"
 346  */
 347 static int kingsun_net_close(struct net_device *netdev)
 348 {
 349         struct kingsun_cb *kingsun = netdev_priv(netdev);
 350
 351         /* Stop transmit processing */
 352         netif_stop_queue(netdev);
 353
 354         /* Mop up receive && transmit urb's */
 355         usb_kill_urb(kingsun->tx_urb);
 356         usb_kill_urb(kingsun->rx_urb);
 357
 358         usb_free_urb(kingsun->tx_urb);
 359         usb_free_urb(kingsun->rx_urb);
 360
 361         kingsun->tx_urb = NULL;
 362         kingsun->rx_urb = NULL;
 363
 364         kfree_skb(kingsun->rx_buff.skb);
 365         kingsun->rx_buff.skb = NULL;
 366         kingsun->rx_buff.head = NULL;
 367         kingsun->rx_buff.in_frame = FALSE;
 368         kingsun->rx_buff.state = OUTSIDE_FRAME;
 369         kingsun->receiving = 0;
 370
 371         /* Stop and remove instance of IrLAP */
 372         if (kingsun->irlap)
 373                 irlap_close(kingsun->irlap);
 374
 375         kingsun->irlap = NULL;
 376
 377         return 0;
 378 }
 379
 380 /*
 381  * IOCTLs : Extra out-of-band network commands...
 382  */
 383 static int kingsun_net_ioctl(struct net_device *netdev, struct ifreq *rq,
 384                              int cmd)
 385 {
 386         struct if_irda_req *irq = (struct if_irda_req *) rq;
 387         struct kingsun_cb *kingsun = netdev_priv(netdev);
 388         int ret = 0;
 389
 390         switch (cmd) {
 391         case SIOCSBANDWIDTH: /* Set bandwidth */
 392                 if (!capable(CAP_NET_ADMIN))
 393                         return -EPERM;
 394
 395                 /* Check if the device is still there */
 396                 if (netif_device_present(kingsun->netdev))
 397                         /* No observed commands for speed change */
 398                         ret = -EOPNOTSUPP;
 399                 break;
 400
 401         case SIOCSMEDIABUSY: /* Set media busy */
 402                 if (!capable(CAP_NET_ADMIN))
 403                         return -EPERM;
 404
 405                 /* Check if the IrDA stack is still there */
 406                 if (netif_running(kingsun->netdev))
 407                         irda_device_set_media_busy(kingsun->netdev, TRUE);
 408                 break;
 409
 410         case SIOCGRECEIVING:
 411                 /* Only approximately true */
 412                 irq->ifr_receiving = kingsun->receiving;
 413                 break;
 414
 415         default:
 416                 ret = -EOPNOTSUPP;
 417         }
 418
 419         return ret;
 420 }
 421
 422 /*
 423  * Get device stats (for /proc/net/dev and ifconfig)
 424  */
 425 static struct net_device_stats *
 426 kingsun_net_get_stats(struct net_device *netdev)
 427 {
 428         struct kingsun_cb *kingsun = netdev_priv(netdev);
 429         return &kingsun->stats;
 430 }
 431
 432 /*
 433  * This routine is called by the USB subsystem for each new device
 434  * in the system. We need to check if the device is ours, and in
 435  * this case start handling it.
 436  */
 437 static int kingsun_probe(struct usb_interface *intf,
 438                       const struct usb_device_id *id)
 439 {
 440         struct usb_host_interface *interface;
 441         struct usb_endpoint_descriptor *endpoint;
 442
 443         struct usb_device *dev = interface_to_usbdev(intf);
 444         struct kingsun_cb *kingsun = NULL;
 445         struct net_device *net = NULL;
 446         int ret = -ENOMEM;
 447         int pipe, maxp_in, maxp_out;
 448         __u8 ep_in;
 449         __u8 ep_out;
 450
 451         /* Check that there really are two interrupt endpoints.
 452            Check based on the one in drivers/usb/input/usbmouse.c
 453          */
 454         interface = intf->cur_altsetting;
 455         if (interface->desc.bNumEndpoints != 2) {
 456                 err("kingsun-sir: expected 2 endpoints, found %d",
 457                     interface->desc.bNumEndpoints);
 458                 return -ENODEV;
 459         }
 460         endpoint = &interface->endpoint[KINGSUN_EP_IN].desc;
 461         if (!usb_endpoint_is_int_in(endpoint)) {
 462                 err("kingsun-sir: endpoint 0 is not interrupt IN");
 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                 err("%s: endpoint 0 has max packet size %d not in range",
 471                     __FILE__, maxp_in);
 472                 return -ENODEV;
 473         }
 474
 475         endpoint = &interface->endpoint[KINGSUN_EP_OUT].desc;
 476         if (!usb_endpoint_is_int_out(endpoint)) {
 477                 err("kingsun-sir: endpoint 1 is not interrupt OUT");
 478                 return -ENODEV;
 479         }
 480
 481         ep_out = endpoint->bEndpointAddress;
 482         pipe = usb_sndintpipe(dev, ep_out);
 483         maxp_out = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
 484
 485         /* Allocate network device container. */
 486         net = alloc_irdadev(sizeof(*kingsun));
 487         if(!net)
 488                 goto err_out1;
 489
 490         SET_NETDEV_DEV(net, &intf->dev);
 491         kingsun = netdev_priv(net);
 492         kingsun->irlap = NULL;
 493         kingsun->tx_urb = NULL;
 494         kingsun->rx_urb = NULL;
 495         kingsun->ep_in = ep_in;
 496         kingsun->ep_out = ep_out;
 497         kingsun->in_buf = NULL;
 498         kingsun->out_buf = NULL;
 499         kingsun->max_rx = (__u8)maxp_in;
 500         kingsun->max_tx = (__u8)maxp_out;
 501         kingsun->netdev = net;
 502         kingsun->usbdev = dev;
 503         kingsun->rx_buff.in_frame = FALSE;
 504         kingsun->rx_buff.state = OUTSIDE_FRAME;
 505         kingsun->rx_buff.skb = NULL;
 506         kingsun->receiving = 0;
 507         spin_lock_init(&kingsun->lock);
 508
 509         /* Allocate input buffer */
 510         kingsun->in_buf = kmalloc(kingsun->max_rx, GFP_KERNEL);
 511         if (!kingsun->in_buf)
 512                 goto free_mem;
 513
 514         /* Allocate output buffer */
 515         kingsun->out_buf = kmalloc(KINGSUN_FIFO_SIZE, GFP_KERNEL);
 516         if (!kingsun->out_buf)
 517                 goto free_mem;
 518
 519         printk(KERN_INFO "KingSun/DonShine IRDA/USB found at address %d, "
 520                 "Vendor: %x, Product: %x\n",
 521                dev->devnum, le16_to_cpu(dev->descriptor.idVendor),
 522                le16_to_cpu(dev->descriptor.idProduct));
 523
 524         /* Initialize QoS for this device */
 525         irda_init_max_qos_capabilies(&kingsun->qos);
 526
 527         /* That's the Rx capability. */
 528         kingsun->qos.baud_rate.bits       &= IR_9600;
 529         kingsun->qos.min_turn_time.bits   &= KINGSUN_MTT;
 530         irda_qos_bits_to_value(&kingsun->qos);
 531
 532         /* Override the network functions we need to use */
 533         net->hard_start_xmit = kingsun_hard_xmit;
 534         net->open            = kingsun_net_open;
 535         net->stop            = kingsun_net_close;
 536         net->get_stats       = kingsun_net_get_stats;
 537         net->do_ioctl        = kingsun_net_ioctl;
 538
 539         ret = register_netdev(net);
 540         if (ret != 0)
 541                 goto free_mem;
 542
 543         info("IrDA: Registered KingSun/DonShine device %s", net->name);
 544
 545         usb_set_intfdata(intf, kingsun);
 546
 547         /* Situation at this point:
 548            - all work buffers allocated
 549            - urbs not allocated, set to NULL
 550            - max rx packet known (in max_rx)
 551            - unwrap state machine (partially) initialized, but skb == NULL
 552          */
 553
 554         return 0;
 555
 556 free_mem:
 557         if (kingsun->out_buf) kfree(kingsun->out_buf);
 558         if (kingsun->in_buf) kfree(kingsun->in_buf);
 559         free_netdev(net);
 560 err_out1:
 561         return ret;
 562 }
 563
 564 /*
 565  * The current device is removed, the USB layer tell us to shut it down...
 566  */
 567 static void kingsun_disconnect(struct usb_interface *intf)
 568 {
 569         struct kingsun_cb *kingsun = usb_get_intfdata(intf);
 570
 571         if (!kingsun)
 572                 return;
 573
 574         unregister_netdev(kingsun->netdev);
 575
 576         /* Mop up receive && transmit urb's */
 577         if (kingsun->tx_urb != NULL) {
 578                 usb_kill_urb(kingsun->tx_urb);
 579                 usb_free_urb(kingsun->tx_urb);
 580                 kingsun->tx_urb = NULL;
 581         }
 582         if (kingsun->rx_urb != NULL) {
 583                 usb_kill_urb(kingsun->rx_urb);
 584                 usb_free_urb(kingsun->rx_urb);
 585                 kingsun->rx_urb = NULL;
 586         }
 587
 588         kfree(kingsun->out_buf);
 589         kfree(kingsun->in_buf);
 590         free_netdev(kingsun->netdev);
 591
 592         usb_set_intfdata(intf, NULL);
 593 }
 594
 595 #ifdef CONFIG_PM
 596 /* USB suspend, so power off the transmitter/receiver */
 597 static int kingsun_suspend(struct usb_interface *intf, pm_message_t message)
 598 {
 599         struct kingsun_cb *kingsun = usb_get_intfdata(intf);
 600
 601         netif_device_detach(kingsun->netdev);
 602         if (kingsun->tx_urb != NULL) usb_kill_urb(kingsun->tx_urb);
 603         if (kingsun->rx_urb != NULL) usb_kill_urb(kingsun->rx_urb);
 604         return 0;
 605 }
 606
 607 /* Coming out of suspend, so reset hardware */
 608 static int kingsun_resume(struct usb_interface *intf)
 609 {
 610         struct kingsun_cb *kingsun = usb_get_intfdata(intf);
 611
 612         if (kingsun->rx_urb != NULL)
 613                 usb_submit_urb(kingsun->rx_urb, GFP_KERNEL);
 614         netif_device_attach(kingsun->netdev);
 615
 616         return 0;
 617 }
 618 #endif
 619
 620 /*
 621  * USB device callbacks
 622  */
 623 static struct usb_driver irda_driver = {
 624         .name           = "kingsun-sir",
 625         .probe          = kingsun_probe,
 626         .disconnect     = kingsun_disconnect,
 627         .id_table       = dongles,
 628 #ifdef CONFIG_PM
 629         .suspend        = kingsun_suspend,
 630         .resume         = kingsun_resume,
 631 #endif
 632 };
 633
 634 /*
 635  * Module insertion
 636  */
 637 static int __init kingsun_init(void)
 638 {
 639         return usb_register(&irda_driver);
 640 }
 641 module_init(kingsun_init);
 642
 643 /*
 644  * Module removal
 645  */
 646 static void __exit kingsun_cleanup(void)
 647 {
 648         /* Deregister the driver and remove all pending instances */
 649         usb_deregister(&irda_driver);
 650 }
 651 module_exit(kingsun_cleanup);
 652
 653 MODULE_AUTHOR("Alex Villacís Lasso <a_villacis@palosanto.com>");
 654 MODULE_DESCRIPTION("IrDA-USB Dongle Driver for KingSun/DonShine");
 655 MODULE_LICENSE("GPL");