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/usb.h>
  70 #include <linux/device.h>
  71 #include <linux/crc32.h>
  72
  73 #include <asm/unaligned.h>
  74 #include <asm/byteorder.h>
  75 #include <asm/uaccess.h>
  76
  77 #include <net/irda/irda.h>
  78 #include <net/irda/wrapper.h>
  79 #include <net/irda/crc.h>
  80
  81 /*
  82  * According to lsusb, 0x07c0 is assigned to
  83  * "Code Mercenaries Hard- und Software GmbH"
  84  */
  85 #define KING_VENDOR_ID 0x07c0
  86 #define KING_PRODUCT_ID 0x4200
  87
  88 /* These are the currently known USB ids */
  89 static struct usb_device_id dongles[] = {
  90     /* KingSun Co,Ltd  IrDA/USB Bridge */
  91     { USB_DEVICE(KING_VENDOR_ID, KING_PRODUCT_ID) },
  92     { }
  93 };
  94
  95 MODULE_DEVICE_TABLE(usb, dongles);
  96
  97 #define KINGSUN_MTT 0x07
  98
  99 #define KINGSUN_FIFO_SIZE               4096
 100 #define KINGSUN_EP_IN                   0
 101 #define KINGSUN_EP_OUT                  1
 102
 103 struct kingsun_cb {
 104         struct usb_device *usbdev;      /* init: probe_irda */
 105         struct net_device *netdev;      /* network layer */
 106         struct irlap_cb   *irlap;       /* The link layer we are binded to */
 107
 108         struct qos_info   qos;
 109
 110         __u8              *in_buf;      /* receive buffer */
 111         __u8              *out_buf;     /* transmit buffer */
 112         __u8              max_rx;       /* max. atomic read from dongle
 113                                            (usually 8), also size of in_buf */
 114         __u8              max_tx;       /* max. atomic write to dongle
 115                                            (usually 8) */
 116
 117         iobuff_t          rx_buff;      /* receive unwrap state machine */
 118         struct timeval    rx_time;
 119         spinlock_t lock;
 120         int receiving;
 121
 122         __u8 ep_in;
 123         __u8 ep_out;
 124
 125         struct urb       *tx_urb;
 126         struct urb       *rx_urb;
 127 };
 128
 129 /* Callback transmission routine */
 130 static void kingsun_send_irq(struct urb *urb)
 131 {
 132         struct kingsun_cb *kingsun = urb->context;
 133         struct net_device *netdev = kingsun->netdev;
 134
 135         /* in process of stopping, just drop data */
 136         if (!netif_running(kingsun->netdev)) {
 137                 dev_err(&kingsun->usbdev->dev,
 138                         "kingsun_send_irq: Network not running!\n");
 139                 return;
 140         }
 141
 142         /* unlink, shutdown, unplug, other nasties */
 143         if (urb->status != 0) {
 144                 dev_err(&kingsun->usbdev->dev,
 145                         "kingsun_send_irq: urb asynchronously failed - %d\n",
 146                         urb->status);
 147         }
 148         netif_wake_queue(netdev);
 149 }
 150
 151 /*
 152  * Called from net/core when new frame is available.
 153  */
 154 static netdev_tx_t kingsun_hard_xmit(struct sk_buff *skb,
 155                                            struct net_device *netdev)
 156 {
 157         struct kingsun_cb *kingsun;
 158         int wraplen;
 159         int ret = 0;
 160
 161         netif_stop_queue(netdev);
 162
 163         /* the IRDA wrapping routines don't deal with non linear skb */
 164         SKB_LINEAR_ASSERT(skb);
 165
 166         kingsun = netdev_priv(netdev);
 167
 168         spin_lock(&kingsun->lock);
 169
 170         /* Append data to the end of whatever data remains to be transmitted */
 171         wraplen = async_wrap_skb(skb,
 172                 kingsun->out_buf,
 173                 KINGSUN_FIFO_SIZE);
 174
 175         /* Calculate how much data can be transmitted in this urb */
 176         usb_fill_int_urb(kingsun->tx_urb, kingsun->usbdev,
 177                 usb_sndintpipe(kingsun->usbdev, kingsun->ep_out),
 178                 kingsun->out_buf, wraplen, kingsun_send_irq,
 179                 kingsun, 1);
 180
 181         if ((ret = usb_submit_urb(kingsun->tx_urb, GFP_ATOMIC))) {
 182                 dev_err(&kingsun->usbdev->dev,
 183                         "kingsun_hard_xmit: failed tx_urb submit: %d\n", ret);
 184                 switch (ret) {
 185                 case -ENODEV:
 186                 case -EPIPE:
 187                         break;
 188                 default:
 189                         netdev->stats.tx_errors++;
 190                         netif_start_queue(netdev);
 191                 }
 192         } else {
 193                 netdev->stats.tx_packets++;
 194                 netdev->stats.tx_bytes += skb->len;
 195         }
 196
 197         dev_kfree_skb(skb);
 198         spin_unlock(&kingsun->lock);
 199
 200         return NETDEV_TX_OK;
 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                 dev_err(&kingsun->usbdev->dev,
 218                         "kingsun_rcv_irq: urb asynchronously failed - %d\n",
 219                         urb->status);
 220                 kingsun->receiving = 0;
 221                 return;
 222         }
 223
 224         if (urb->actual_length == kingsun->max_rx) {
 225                 __u8 *bytes = urb->transfer_buffer;
 226                 int i;
 227
 228                 /* The very first byte in the buffer indicates the length of
 229                    valid data in the read. This byte must be in the range
 230                    1..kingsun->max_rx -1 . Values outside this range indicate
 231                    an uninitialized Rx buffer when the dongle has just been
 232                    plugged in. */
 233                 if (bytes[0] >= 1 && bytes[0] < kingsun->max_rx) {
 234                         for (i = 1; i <= bytes[0]; i++) {
 235                                 async_unwrap_char(kingsun->netdev,
 236                                                   &kingsun->netdev->stats,
 237                                                   &kingsun->rx_buff, bytes[i]);
 238                         }
 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                 dev_err(&kingsun->usbdev->dev,
 246                         "%s(): Unexpected response length, expected %d got %d\n",
 247                         __func__, kingsun->max_rx, urb->actual_length);
 248         }
 249         /* This urb has already been filled in kingsun_net_open */
 250         ret = usb_submit_urb(urb, GFP_ATOMIC);
 251 }
 252
 253 /*
 254  * Function kingsun_net_open (dev)
 255  *
 256  *    Network device is taken up. Usually this is done by "ifconfig irda0 up"
 257  */
 258 static int kingsun_net_open(struct net_device *netdev)
 259 {
 260         struct kingsun_cb *kingsun = netdev_priv(netdev);
 261         int err = -ENOMEM;
 262         char hwname[16];
 263
 264         /* At this point, urbs are NULL, and skb is NULL (see kingsun_probe) */
 265         kingsun->receiving = 0;
 266
 267         /* Initialize for SIR to copy data directly into skb.  */
 268         kingsun->rx_buff.in_frame = FALSE;
 269         kingsun->rx_buff.state = OUTSIDE_FRAME;
 270         kingsun->rx_buff.truesize = IRDA_SKB_MAX_MTU;
 271         kingsun->rx_buff.skb = dev_alloc_skb(IRDA_SKB_MAX_MTU);
 272         if (!kingsun->rx_buff.skb)
 273                 goto free_mem;
 274
 275         skb_reserve(kingsun->rx_buff.skb, 1);
 276         kingsun->rx_buff.head = kingsun->rx_buff.skb->data;
 277         do_gettimeofday(&kingsun->rx_time);
 278
 279         kingsun->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 280         if (!kingsun->rx_urb)
 281                 goto free_mem;
 282
 283         kingsun->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 284         if (!kingsun->tx_urb)
 285                 goto free_mem;
 286
 287         /*
 288          * Now that everything should be initialized properly,
 289          * Open new IrLAP layer instance to take care of us...
 290          */
 291         sprintf(hwname, "usb#%d", kingsun->usbdev->devnum);
 292         kingsun->irlap = irlap_open(netdev, &kingsun->qos, hwname);
 293         if (!kingsun->irlap) {
 294                 dev_err(&kingsun->usbdev->dev, "irlap_open failed\n");
 295                 goto free_mem;
 296         }
 297
 298         /* Start first reception */
 299         usb_fill_int_urb(kingsun->rx_urb, kingsun->usbdev,
 300                           usb_rcvintpipe(kingsun->usbdev, kingsun->ep_in),
 301                           kingsun->in_buf, kingsun->max_rx,
 302                           kingsun_rcv_irq, kingsun, 1);
 303         kingsun->rx_urb->status = 0;
 304         err = usb_submit_urb(kingsun->rx_urb, GFP_KERNEL);
 305         if (err) {
 306                 dev_err(&kingsun->usbdev->dev,
 307                         "first urb-submit failed: %d\n", err);
 308                 goto close_irlap;
 309         }
 310
 311         netif_start_queue(netdev);
 312
 313         /* Situation at this point:
 314            - all work buffers allocated
 315            - urbs allocated and ready to fill
 316            - max rx packet known (in max_rx)
 317            - unwrap state machine initialized, in state outside of any frame
 318            - receive request in progress
 319            - IrLAP layer started, about to hand over packets to send
 320          */
 321
 322         return 0;
 323
 324  close_irlap:
 325         irlap_close(kingsun->irlap);
 326  free_mem:
 327         if (kingsun->tx_urb) {
 328                 usb_free_urb(kingsun->tx_urb);
 329                 kingsun->tx_urb = NULL;
 330         }
 331         if (kingsun->rx_urb) {
 332                 usb_free_urb(kingsun->rx_urb);
 333                 kingsun->rx_urb = NULL;
 334         }
 335         if (kingsun->rx_buff.skb) {
 336                 kfree_skb(kingsun->rx_buff.skb);
 337                 kingsun->rx_buff.skb = NULL;
 338                 kingsun->rx_buff.head = NULL;
 339         }
 340         return err;
 341 }
 342
 343 /*
 344  * Function kingsun_net_close (kingsun)
 345  *
 346  *    Network device is taken down. Usually this is done by
 347  *    "ifconfig irda0 down"
 348  */
 349 static int kingsun_net_close(struct net_device *netdev)
 350 {
 351         struct kingsun_cb *kingsun = netdev_priv(netdev);
 352
 353         /* Stop transmit processing */
 354         netif_stop_queue(netdev);
 355
 356         /* Mop up receive && transmit urb's */
 357         usb_kill_urb(kingsun->tx_urb);
 358         usb_kill_urb(kingsun->rx_urb);
 359
 360         usb_free_urb(kingsun->tx_urb);
 361         usb_free_urb(kingsun->rx_urb);
 362
 363         kingsun->tx_urb = NULL;
 364         kingsun->rx_urb = NULL;
 365
 366         kfree_skb(kingsun->rx_buff.skb);
 367         kingsun->rx_buff.skb = NULL;
 368         kingsun->rx_buff.head = NULL;
 369         kingsun->rx_buff.in_frame = FALSE;
 370         kingsun->rx_buff.state = OUTSIDE_FRAME;
 371         kingsun->receiving = 0;
 372
 373         /* Stop and remove instance of IrLAP */
 374         if (kingsun->irlap)
 375                 irlap_close(kingsun->irlap);
 376
 377         kingsun->irlap = NULL;
 378
 379         return 0;
 380 }
 381
 382 /*
 383  * IOCTLs : Extra out-of-band network commands...
 384  */
 385 static int kingsun_net_ioctl(struct net_device *netdev, struct ifreq *rq,
 386                              int cmd)
 387 {
 388         struct if_irda_req *irq = (struct if_irda_req *) rq;
 389         struct kingsun_cb *kingsun = netdev_priv(netdev);
 390         int ret = 0;
 391
 392         switch (cmd) {
 393         case SIOCSBANDWIDTH: /* Set bandwidth */
 394                 if (!capable(CAP_NET_ADMIN))
 395                         return -EPERM;
 396
 397                 /* Check if the device is still there */
 398                 if (netif_device_present(kingsun->netdev))
 399                         /* No observed commands for speed change */
 400                         ret = -EOPNOTSUPP;
 401                 break;
 402
 403         case SIOCSMEDIABUSY: /* Set media busy */
 404                 if (!capable(CAP_NET_ADMIN))
 405                         return -EPERM;
 406
 407                 /* Check if the IrDA stack is still there */
 408                 if (netif_running(kingsun->netdev))
 409                         irda_device_set_media_busy(kingsun->netdev, TRUE);
 410                 break;
 411
 412         case SIOCGRECEIVING:
 413                 /* Only approximately true */
 414                 irq->ifr_receiving = kingsun->receiving;
 415                 break;
 416
 417         default:
 418                 ret = -EOPNOTSUPP;
 419         }
 420
 421         return ret;
 422 }
 423
 424 static const struct net_device_ops kingsun_ops = {
 425         .ndo_start_xmit      = kingsun_hard_xmit,
 426         .ndo_open            = kingsun_net_open,
 427         .ndo_stop            = kingsun_net_close,
 428         .ndo_do_ioctl        = kingsun_net_ioctl,
 429 };
 430
 431 /*
 432  * This routine is called by the USB subsystem for each new device
 433  * in the system. We need to check if the device is ours, and in
 434  * this case start handling it.
 435  */
 436 static int kingsun_probe(struct usb_interface *intf,
 437                       const struct usb_device_id *id)
 438 {
 439         struct usb_host_interface *interface;
 440         struct usb_endpoint_descriptor *endpoint;
 441
 442         struct usb_device *dev = interface_to_usbdev(intf);
 443         struct kingsun_cb *kingsun = NULL;
 444         struct net_device *net = NULL;
 445         int ret = -ENOMEM;
 446         int pipe, maxp_in, maxp_out;
 447         __u8 ep_in;
 448         __u8 ep_out;
 449
 450         /* Check that there really are two interrupt endpoints.
 451            Check based on the one in drivers/usb/input/usbmouse.c
 452          */
 453         interface = intf->cur_altsetting;
 454         if (interface->desc.bNumEndpoints != 2) {
 455                 dev_err(&intf->dev,
 456                         "kingsun-sir: expected 2 endpoints, found %d\n",
 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                 dev_err(&intf->dev,
 463                         "kingsun-sir: endpoint 0 is not interrupt IN\n");
 464                 return -ENODEV;
 465         }
 466
 467         ep_in = endpoint->bEndpointAddress;
 468         pipe = usb_rcvintpipe(dev, ep_in);
 469         maxp_in = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
 470         if (maxp_in > 255 || maxp_in <= 1) {
 471                 dev_err(&intf->dev,
 472                         "endpoint 0 has max packet size %d not in range\n",
 473                         maxp_in);
 474                 return -ENODEV;
 475         }
 476
 477         endpoint = &interface->endpoint[KINGSUN_EP_OUT].desc;
 478         if (!usb_endpoint_is_int_out(endpoint)) {
 479                 dev_err(&intf->dev,
 480                         "kingsun-sir: endpoint 1 is not interrupt OUT\n");
 481                 return -ENODEV;
 482         }
 483
 484         ep_out = endpoint->bEndpointAddress;
 485         pipe = usb_sndintpipe(dev, ep_out);
 486         maxp_out = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
 487
 488         /* Allocate network device container. */
 489         net = alloc_irdadev(sizeof(*kingsun));
 490         if(!net)
 491                 goto err_out1;
 492
 493         SET_NETDEV_DEV(net, &intf->dev);
 494         kingsun = netdev_priv(net);
 495         kingsun->irlap = NULL;
 496         kingsun->tx_urb = NULL;
 497         kingsun->rx_urb = NULL;
 498         kingsun->ep_in = ep_in;
 499         kingsun->ep_out = ep_out;
 500         kingsun->in_buf = NULL;
 501         kingsun->out_buf = NULL;
 502         kingsun->max_rx = (__u8)maxp_in;
 503         kingsun->max_tx = (__u8)maxp_out;
 504         kingsun->netdev = net;
 505         kingsun->usbdev = dev;
 506         kingsun->rx_buff.in_frame = FALSE;
 507         kingsun->rx_buff.state = OUTSIDE_FRAME;
 508         kingsun->rx_buff.skb = NULL;
 509         kingsun->receiving = 0;
 510         spin_lock_init(&kingsun->lock);
 511
 512         /* Allocate input buffer */
 513         kingsun->in_buf = kmalloc(kingsun->max_rx, GFP_KERNEL);
 514         if (!kingsun->in_buf)
 515                 goto free_mem;
 516
 517         /* Allocate output buffer */
 518         kingsun->out_buf = kmalloc(KINGSUN_FIFO_SIZE, GFP_KERNEL);
 519         if (!kingsun->out_buf)
 520                 goto free_mem;
 521
 522         printk(KERN_INFO "KingSun/DonShine IRDA/USB found at address %d, "
 523                 "Vendor: %x, Product: %x\n",
 524                dev->devnum, le16_to_cpu(dev->descriptor.idVendor),
 525                le16_to_cpu(dev->descriptor.idProduct));
 526
 527         /* Initialize QoS for this device */
 528         irda_init_max_qos_capabilies(&kingsun->qos);
 529
 530         /* That's the Rx capability. */
 531         kingsun->qos.baud_rate.bits       &= IR_9600;
 532         kingsun->qos.min_turn_time.bits   &= KINGSUN_MTT;
 533         irda_qos_bits_to_value(&kingsun->qos);
 534
 535         /* Override the network functions we need to use */
 536         net->netdev_ops = &kingsun_ops;
 537
 538         ret = register_netdev(net);
 539         if (ret != 0)
 540                 goto free_mem;
 541
 542         dev_info(&net->dev, "IrDA: Registered KingSun/DonShine device %s\n",
 543                  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 module_usb_driver(irda_driver);
 635
 636 MODULE_AUTHOR("Alex Villacís Lasso <a_villacis@palosanto.com>");
 637 MODULE_DESCRIPTION("IrDA-USB Dongle Driver for KingSun/DonShine");
 638 MODULE_LICENSE("GPL");