kernel/drivers/net/irda/irda-usb.c

   1 /*****************************************************************************
   2  *
   3  * Filename:      irda-usb.c
   4  * Version:       0.10
   5  * Description:   IrDA-USB Driver
   6  * Status:        Experimental
   7  * Author:        Dag Brattli <dag@brattli.net>
   8  *
   9  *      Copyright (C) 2000, Roman Weissgaerber <weissg@vienna.at>
  10  *      Copyright (C) 2001, Dag Brattli <dag@brattli.net>
  11  *      Copyright (C) 2001, Jean Tourrilhes <jt@hpl.hp.com>
  12  *      Copyright (C) 2004, SigmaTel, Inc. <irquality@sigmatel.com>
  13  *      Copyright (C) 2005, Milan Beno <beno@pobox.sk>
  14  *      Copyright (C) 2006, Nick Fedchik <nick@fedchik.org.ua>
  15  *
  16  *      This program is free software; you can redistribute it and/or modify
  17  *      it under the terms of the GNU General Public License as published by
  18  *      the Free Software Foundation; either version 2 of the License, or
  19  *      (at your option) any later version.
  20  *
  21  *      This program is distributed in the hope that it will be useful,
  22  *      but WITHOUT ANY WARRANTY; without even the implied warranty of
  23  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24  *      GNU General Public License for more details.
  25  *
  26  *      You should have received a copy of the GNU General Public License
  27  *      along with this program; if not, write to the Free Software
  28  *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  29  *
  30  *****************************************************************************/
  31
  32 /*
  33  *                          IMPORTANT NOTE
  34  *                          --------------
  35  *
  36  * As of kernel 2.5.20, this is the state of compliance and testing of
  37  * this driver (irda-usb) with regards to the USB low level drivers...
  38  *
  39  * This driver has been tested SUCCESSFULLY with the following drivers :
  40  *      o usb-uhci-hcd  (For Intel/Via USB controllers)
  41  *      o uhci-hcd      (Alternate/JE driver for Intel/Via USB controllers)
  42  *      o ohci-hcd      (For other USB controllers)
  43  *
  44  * This driver has NOT been tested with the following drivers :
  45  *      o ehci-hcd      (USB 2.0 controllers)
  46  *
  47  * Note that all HCD drivers do URB_ZERO_PACKET and timeout properly,
  48  * so we don't have to worry about that anymore.
  49  * One common problem is the failure to set the address on the dongle,
  50  * but this happens before the driver gets loaded...
  51  *
  52  * Jean II
  53  */
  54
  55 /*------------------------------------------------------------------*/
  56
  57 #include <linux/module.h>
  58 #include <linux/moduleparam.h>
  59 #include <linux/kernel.h>
  60 #include <linux/types.h>
  61 #include <linux/skbuff.h>
  62 #include <linux/netdevice.h>
  63 #include <linux/slab.h>
  64 #include <linux/rtnetlink.h>
  65 #include <linux/usb.h>
  66 #include <linux/firmware.h>
  67
  68 #include "irda-usb.h"
  69
  70 /*------------------------------------------------------------------*/
  71
  72 static int qos_mtt_bits = 0;
  73
  74 /* These are the currently known IrDA USB dongles. Add new dongles here */
  75 static struct usb_device_id dongles[] = {
  76         /* ACTiSYS Corp.,  ACT-IR2000U FIR-USB Adapter */
  77         { USB_DEVICE(0x9c4, 0x011), .driver_info = IUC_SPEED_BUG | IUC_NO_WINDOW },
  78         /* Look like ACTiSYS, Report : IBM Corp., IBM UltraPort IrDA */
  79         { USB_DEVICE(0x4428, 0x012), .driver_info = IUC_SPEED_BUG | IUC_NO_WINDOW },
  80         /* KC Technology Inc.,  KC-180 USB IrDA Device */
  81         { USB_DEVICE(0x50f, 0x180), .driver_info = IUC_SPEED_BUG | IUC_NO_WINDOW },
  82         /* Extended Systems, Inc.,  XTNDAccess IrDA USB (ESI-9685) */
  83         { USB_DEVICE(0x8e9, 0x100), .driver_info = IUC_SPEED_BUG | IUC_NO_WINDOW },
  84         /* SigmaTel STIR4210/4220/4116 USB IrDA (VFIR) Bridge */
  85         { USB_DEVICE(0x66f, 0x4210), .driver_info = IUC_STIR421X | IUC_SPEED_BUG },
  86         { USB_DEVICE(0x66f, 0x4220), .driver_info = IUC_STIR421X | IUC_SPEED_BUG },
  87         { USB_DEVICE(0x66f, 0x4116), .driver_info = IUC_STIR421X | IUC_SPEED_BUG },
  88         { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS |
  89           USB_DEVICE_ID_MATCH_INT_SUBCLASS,
  90           .bInterfaceClass = USB_CLASS_APP_SPEC,
  91           .bInterfaceSubClass = USB_CLASS_IRDA,
  92           .driver_info = IUC_DEFAULT, },
  93         { }, /* The end */
  94 };
  95
  96 /*
  97  * Important note :
  98  * Devices based on the SigmaTel chipset (0x66f, 0x4200) are not designed
  99  * using the "USB-IrDA specification" (yes, there exist such a thing), and
 100  * therefore not supported by this driver (don't add them above).
 101  * There is a Linux driver, stir4200, that support those USB devices.
 102  * Jean II
 103  */
 104
 105 MODULE_DEVICE_TABLE(usb, dongles);
 106
 107 /*------------------------------------------------------------------*/
 108
 109 static void irda_usb_init_qos(struct irda_usb_cb *self) ;
 110 static struct irda_class_desc *irda_usb_find_class_desc(struct usb_interface *intf);
 111 static void irda_usb_disconnect(struct usb_interface *intf);
 112 static void irda_usb_change_speed_xbofs(struct irda_usb_cb *self);
 113 static netdev_tx_t irda_usb_hard_xmit(struct sk_buff *skb,
 114                                             struct net_device *dev);
 115 static int irda_usb_open(struct irda_usb_cb *self);
 116 static void irda_usb_close(struct irda_usb_cb *self);
 117 static void speed_bulk_callback(struct urb *urb);
 118 static void write_bulk_callback(struct urb *urb);
 119 static void irda_usb_receive(struct urb *urb);
 120 static void irda_usb_rx_defer_expired(unsigned long data);
 121 static int irda_usb_net_open(struct net_device *dev);
 122 static int irda_usb_net_close(struct net_device *dev);
 123 static int irda_usb_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 124 static void irda_usb_net_timeout(struct net_device *dev);
 125
 126 /************************ TRANSMIT ROUTINES ************************/
 127 /*
 128  * Receive packets from the IrDA stack and send them on the USB pipe.
 129  * Handle speed change, timeout and lot's of ugliness...
 130  */
 131
 132 /*------------------------------------------------------------------*/
 133 /*
 134  * Function irda_usb_build_header(self, skb, header)
 135  *
 136  *   Builds USB-IrDA outbound header
 137  *
 138  * When we send an IrDA frame over an USB pipe, we add to it a 1 byte
 139  * header. This function create this header with the proper values.
 140  *
 141  * Important note : the USB-IrDA spec 1.0 say very clearly in chapter 5.4.2.2
 142  * that the setting of the link speed and xbof number in this outbound header
 143  * should be applied *AFTER* the frame has been sent.
 144  * Unfortunately, some devices are not compliant with that... It seems that
 145  * reading the spec is far too difficult...
 146  * Jean II
 147  */
 148 static void irda_usb_build_header(struct irda_usb_cb *self,
 149                                   __u8 *header,
 150                                   int   force)
 151 {
 152         /* Here we check if we have an STIR421x chip,
 153          * and if either speed or xbofs (or both) needs
 154          * to be changed.
 155          */
 156         if (self->capability & IUC_STIR421X &&
 157             ((self->new_speed != -1) || (self->new_xbofs != -1))) {
 158
 159                 /* With STIR421x, speed and xBOFs must be set at the same
 160                  * time, even if only one of them changes.
 161                  */
 162                 if (self->new_speed == -1)
 163                         self->new_speed = self->speed ;
 164
 165                 if (self->new_xbofs == -1)
 166                         self->new_xbofs = self->xbofs ;
 167         }
 168
 169         /* Set the link speed */
 170         if (self->new_speed != -1) {
 171                 /* Hum... Ugly hack :-(
 172                  * Some device are not compliant with the spec and change
 173                  * parameters *before* sending the frame. - Jean II
 174                  */
 175                 if ((self->capability & IUC_SPEED_BUG) &&
 176                     (!force) && (self->speed != -1)) {
 177                         /* No speed and xbofs change here
 178                          * (we'll do it later in the write callback) */
 179                         pr_debug("%s(), not changing speed yet\n", __func__);
 180                         *header = 0;
 181                         return;
 182                 }
 183
 184                 pr_debug("%s(), changing speed to %d\n",
 185                          __func__, self->new_speed);
 186                 self->speed = self->new_speed;
 187                 /* We will do ` self->new_speed = -1; ' in the completion
 188                  * handler just in case the current URB fail - Jean II */
 189
 190                 switch (self->speed) {
 191                 case 2400:
 192                         *header = SPEED_2400;
 193                         break;
 194                 default:
 195                 case 9600:
 196                         *header = SPEED_9600;
 197                         break;
 198                 case 19200:
 199                         *header = SPEED_19200;
 200                         break;
 201                 case 38400:
 202                         *header = SPEED_38400;
 203                         break;
 204                 case 57600:
 205                         *header = SPEED_57600;
 206                         break;
 207                 case 115200:
 208                         *header = SPEED_115200;
 209                         break;
 210                 case 576000:
 211                         *header = SPEED_576000;
 212                         break;
 213                 case 1152000:
 214                         *header = SPEED_1152000;
 215                         break;
 216                 case 4000000:
 217                         *header = SPEED_4000000;
 218                         self->new_xbofs = 0;
 219                         break;
 220                 case 16000000:
 221                         *header = SPEED_16000000;
 222                         self->new_xbofs = 0;
 223                         break;
 224                 }
 225         } else
 226                 /* No change */
 227                 *header = 0;
 228
 229         /* Set the negotiated additional XBOFS */
 230         if (self->new_xbofs != -1) {
 231                 pr_debug("%s(), changing xbofs to %d\n",
 232                          __func__, self->new_xbofs);
 233                 self->xbofs = self->new_xbofs;
 234                 /* We will do ` self->new_xbofs = -1; ' in the completion
 235                  * handler just in case the current URB fail - Jean II */
 236
 237                 switch (self->xbofs) {
 238                 case 48:
 239                         *header |= 0x10;
 240                         break;
 241                 case 28:
 242                 case 24:        /* USB spec 1.0 says 24 */
 243                         *header |= 0x20;
 244                         break;
 245                 default:
 246                 case 12:
 247                         *header |= 0x30;
 248                         break;
 249                 case 5: /* Bug in IrLAP spec? (should be 6) */
 250                 case 6:
 251                         *header |= 0x40;
 252                         break;
 253                 case 3:
 254                         *header |= 0x50;
 255                         break;
 256                 case 2:
 257                         *header |= 0x60;
 258                         break;
 259                 case 1:
 260                         *header |= 0x70;
 261                         break;
 262                 case 0:
 263                         *header |= 0x80;
 264                         break;
 265                 }
 266         }
 267 }
 268
 269 /*
 270 *   calculate turnaround time for SigmaTel header
 271 */
 272 static __u8 get_turnaround_time(struct sk_buff *skb)
 273 {
 274         int turnaround_time = irda_get_mtt(skb);
 275
 276         if ( turnaround_time == 0 )
 277                 return 0;
 278         else if ( turnaround_time <= 10 )
 279                 return 1;
 280         else if ( turnaround_time <= 50 )
 281                 return 2;
 282         else if ( turnaround_time <= 100 )
 283                 return 3;
 284         else if ( turnaround_time <= 500 )
 285                 return 4;
 286         else if ( turnaround_time <= 1000 )
 287                 return 5;
 288         else if ( turnaround_time <= 5000 )
 289                 return 6;
 290         else
 291                 return 7;
 292 }
 293
 294
 295 /*------------------------------------------------------------------*/
 296 /*
 297  * Send a command to change the speed of the dongle
 298  * Need to be called with spinlock on.
 299  */
 300 static void irda_usb_change_speed_xbofs(struct irda_usb_cb *self)
 301 {
 302         __u8 *frame;
 303         struct urb *urb;
 304         int ret;
 305
 306         pr_debug("%s(), speed=%d, xbofs=%d\n", __func__,
 307                  self->new_speed, self->new_xbofs);
 308
 309         /* Grab the speed URB */
 310         urb = self->speed_urb;
 311         if (urb->status != 0) {
 312                 net_warn_ratelimited("%s(), URB still in use!\n", __func__);
 313                 return;
 314         }
 315
 316         /* Allocate the fake frame */
 317         frame = self->speed_buff;
 318
 319         /* Set the new speed and xbofs in this fake frame */
 320         irda_usb_build_header(self, frame, 1);
 321
 322         if (self->capability & IUC_STIR421X) {
 323                 if (frame[0] == 0) return ; // do nothing if no change
 324                 frame[1] = 0; // other parameters don't change here
 325                 frame[2] = 0;
 326         }
 327
 328         /* Submit the 0 length IrDA frame to trigger new speed settings */
 329         usb_fill_bulk_urb(urb, self->usbdev,
 330                       usb_sndbulkpipe(self->usbdev, self->bulk_out_ep),
 331                       frame, IRDA_USB_SPEED_MTU,
 332                       speed_bulk_callback, self);
 333         urb->transfer_buffer_length = self->header_length;
 334         urb->transfer_flags = 0;
 335
 336         /* Irq disabled -> GFP_ATOMIC */
 337         if ((ret = usb_submit_urb(urb, GFP_ATOMIC))) {
 338                 net_warn_ratelimited("%s(), failed Speed URB\n", __func__);
 339         }
 340 }
 341
 342 /*------------------------------------------------------------------*/
 343 /*
 344  * Speed URB callback
 345  * Now, we can only get called for the speed URB.
 346  */
 347 static void speed_bulk_callback(struct urb *urb)
 348 {
 349         struct irda_usb_cb *self = urb->context;
 350
 351         /* We should always have a context */
 352         IRDA_ASSERT(self != NULL, return;);
 353         /* We should always be called for the speed URB */
 354         IRDA_ASSERT(urb == self->speed_urb, return;);
 355
 356         /* Check for timeout and other USB nasties */
 357         if (urb->status != 0) {
 358                 /* I get a lot of -ECONNABORTED = -103 here - Jean II */
 359                 pr_debug("%s(), URB complete status %d, transfer_flags 0x%04X\n",
 360                          __func__, urb->status, urb->transfer_flags);
 361
 362                 /* Don't do anything here, that might confuse the USB layer.
 363                  * Instead, we will wait for irda_usb_net_timeout(), the
 364                  * network layer watchdog, to fix the situation.
 365                  * Jean II */
 366                 /* A reset of the dongle might be welcomed here - Jean II */
 367                 return;
 368         }
 369
 370         /* urb is now available */
 371         //urb->status = 0; -> tested above
 372
 373         /* New speed and xbof is now committed in hardware */
 374         self->new_speed = -1;
 375         self->new_xbofs = -1;
 376
 377         /* Allow the stack to send more packets */
 378         netif_wake_queue(self->netdev);
 379 }
 380
 381 /*------------------------------------------------------------------*/
 382 /*
 383  * Send an IrDA frame to the USB dongle (for transmission)
 384  */
 385 static netdev_tx_t irda_usb_hard_xmit(struct sk_buff *skb,
 386                                             struct net_device *netdev)
 387 {
 388         struct irda_usb_cb *self = netdev_priv(netdev);
 389         struct urb *urb = self->tx_urb;
 390         unsigned long flags;
 391         s32 speed;
 392         s16 xbofs;
 393         int res, mtt;
 394
 395         pr_debug("%s() on %s\n", __func__, netdev->name);
 396
 397         netif_stop_queue(netdev);
 398
 399         /* Protect us from USB callbacks, net watchdog and else. */
 400         spin_lock_irqsave(&self->lock, flags);
 401
 402         /* Check if the device is still there.
 403          * We need to check self->present under the spinlock because
 404          * of irda_usb_disconnect() is synchronous - Jean II */
 405         if (!self->present) {
 406                 pr_debug("%s(), Device is gone...\n", __func__);
 407                 goto drop;
 408         }
 409
 410         /* Check if we need to change the number of xbofs */
 411         xbofs = irda_get_next_xbofs(skb);
 412         if ((xbofs != self->xbofs) && (xbofs != -1)) {
 413                 self->new_xbofs = xbofs;
 414         }
 415
 416         /* Check if we need to change the speed */
 417         speed = irda_get_next_speed(skb);
 418         if ((speed != self->speed) && (speed != -1)) {
 419                 /* Set the desired speed */
 420                 self->new_speed = speed;
 421
 422                 /* Check for empty frame */
 423                 if (!skb->len) {
 424                         /* IrLAP send us an empty frame to make us change the
 425                          * speed. Changing speed with the USB adapter is in
 426                          * fact sending an empty frame to the adapter, so we
 427                          * could just let the present function do its job.
 428                          * However, we would wait for min turn time,
 429                          * do an extra memcpy and increment packet counters...
 430                          * Jean II */
 431                         irda_usb_change_speed_xbofs(self);
 432                         netdev->trans_start = jiffies;
 433                         /* Will netif_wake_queue() in callback */
 434                         goto drop;
 435                 }
 436         }
 437
 438         if (urb->status != 0) {
 439                 net_warn_ratelimited("%s(), URB still in use!\n", __func__);
 440                 goto drop;
 441         }
 442
 443         skb_copy_from_linear_data(skb, self->tx_buff + self->header_length, skb->len);
 444
 445         /* Change setting for next frame */
 446         if (self->capability & IUC_STIR421X) {
 447                 __u8 turnaround_time;
 448                 __u8* frame = self->tx_buff;
 449                 turnaround_time = get_turnaround_time( skb );
 450                 irda_usb_build_header(self, frame, 0);
 451                 frame[2] = turnaround_time;
 452                 if ((skb->len != 0) &&
 453                     ((skb->len % 128) == 0) &&
 454                     ((skb->len % 512) != 0)) {
 455                         /* add extra byte for special SigmaTel feature */
 456                         frame[1] = 1;
 457                         skb_put(skb, 1);
 458                 } else {
 459                         frame[1] = 0;
 460                 }
 461         } else {
 462                 irda_usb_build_header(self, self->tx_buff, 0);
 463         }
 464
 465         /* FIXME: Make macro out of this one */
 466         ((struct irda_skb_cb *)skb->cb)->context = self;
 467
 468         usb_fill_bulk_urb(urb, self->usbdev,
 469                       usb_sndbulkpipe(self->usbdev, self->bulk_out_ep),
 470                       self->tx_buff, skb->len + self->header_length,
 471                       write_bulk_callback, skb);
 472
 473         /* This flag (URB_ZERO_PACKET) indicates that what we send is not
 474          * a continuous stream of data but separate packets.
 475          * In this case, the USB layer will insert an empty USB frame (TD)
 476          * after each of our packets that is exact multiple of the frame size.
 477          * This is how the dongle will detect the end of packet - Jean II */
 478         urb->transfer_flags = URB_ZERO_PACKET;
 479
 480         /* Generate min turn time. FIXME: can we do better than this? */
 481         /* Trying to a turnaround time at this level is trying to measure
 482          * processor clock cycle with a wrist-watch, approximate at best...
 483          *
 484          * What we know is the last time we received a frame over USB.
 485          * Due to latency over USB that depend on the USB load, we don't
 486          * know when this frame was received over IrDA (a few ms before ?)
 487          * Then, same story for our outgoing frame...
 488          *
 489          * In theory, the USB dongle is supposed to handle the turnaround
 490          * by itself (spec 1.0, chater 4, page 6). Who knows ??? That's
 491          * why this code is enabled only for dongles that doesn't meet
 492          * the spec.
 493          * Jean II */
 494         if (self->capability & IUC_NO_TURN) {
 495                 mtt = irda_get_mtt(skb);
 496                 if (mtt) {
 497                         int diff;
 498                         diff = ktime_us_delta(ktime_get(), self->stamp);
 499 #ifdef IU_USB_MIN_RTT
 500                         /* Factor in USB delays -> Get rid of udelay() that
 501                          * would be lost in the noise - Jean II */
 502                         diff += IU_USB_MIN_RTT;
 503 #endif /* IU_USB_MIN_RTT */
 504
 505                         /* Check if the mtt is larger than the time we have
 506                          * already used by all the protocol processing
 507                          */
 508                         if (mtt > diff) {
 509                                 mtt -= diff;
 510                                 if (mtt > 1000)
 511                                         mdelay(mtt/1000);
 512                                 else
 513                                         udelay(mtt);
 514                         }
 515                 }
 516         }
 517
 518         /* Ask USB to send the packet - Irq disabled -> GFP_ATOMIC */
 519         if ((res = usb_submit_urb(urb, GFP_ATOMIC))) {
 520                 net_warn_ratelimited("%s(), failed Tx URB\n", __func__);
 521                 netdev->stats.tx_errors++;
 522                 /* Let USB recover : We will catch that in the watchdog */
 523                 /*netif_start_queue(netdev);*/
 524         } else {
 525                 /* Increment packet stats */
 526                 netdev->stats.tx_packets++;
 527                 netdev->stats.tx_bytes += skb->len;
 528
 529                 netdev->trans_start = jiffies;
 530         }
 531         spin_unlock_irqrestore(&self->lock, flags);
 532
 533         return NETDEV_TX_OK;
 534
 535 drop:
 536         /* Drop silently the skb and exit */
 537         dev_kfree_skb(skb);
 538         spin_unlock_irqrestore(&self->lock, flags);
 539         return NETDEV_TX_OK;
 540 }
 541
 542 /*------------------------------------------------------------------*/
 543 /*
 544  * Note : this function will be called only for tx_urb...
 545  */
 546 static void write_bulk_callback(struct urb *urb)
 547 {
 548         unsigned long flags;
 549         struct sk_buff *skb = urb->context;
 550         struct irda_usb_cb *self = ((struct irda_skb_cb *) skb->cb)->context;
 551
 552         /* We should always have a context */
 553         IRDA_ASSERT(self != NULL, return;);
 554         /* We should always be called for the speed URB */
 555         IRDA_ASSERT(urb == self->tx_urb, return;);
 556
 557         /* Free up the skb */
 558         dev_kfree_skb_any(skb);
 559         urb->context = NULL;
 560
 561         /* Check for timeout and other USB nasties */
 562         if (urb->status != 0) {
 563                 /* I get a lot of -ECONNABORTED = -103 here - Jean II */
 564                 pr_debug("%s(), URB complete status %d, transfer_flags 0x%04X\n",
 565                          __func__, urb->status, urb->transfer_flags);
 566
 567                 /* Don't do anything here, that might confuse the USB layer,
 568                  * and we could go in recursion and blow the kernel stack...
 569                  * Instead, we will wait for irda_usb_net_timeout(), the
 570                  * network layer watchdog, to fix the situation.
 571                  * Jean II */
 572                 /* A reset of the dongle might be welcomed here - Jean II */
 573                 return;
 574         }
 575
 576         /* urb is now available */
 577         //urb->status = 0; -> tested above
 578
 579         /* Make sure we read self->present properly */
 580         spin_lock_irqsave(&self->lock, flags);
 581
 582         /* If the network is closed, stop everything */
 583         if ((!self->netopen) || (!self->present)) {
 584                 pr_debug("%s(), Network is gone...\n", __func__);
 585                 spin_unlock_irqrestore(&self->lock, flags);
 586                 return;
 587         }
 588
 589         /* If changes to speed or xbofs is pending... */
 590         if ((self->new_speed != -1) || (self->new_xbofs != -1)) {
 591                 if ((self->new_speed != self->speed) ||
 592                     (self->new_xbofs != self->xbofs)) {
 593                         /* We haven't changed speed yet (because of
 594                          * IUC_SPEED_BUG), so do it now - Jean II */
 595                         pr_debug("%s(), Changing speed now...\n", __func__);
 596                         irda_usb_change_speed_xbofs(self);
 597                 } else {
 598                         /* New speed and xbof is now committed in hardware */
 599                         self->new_speed = -1;
 600                         self->new_xbofs = -1;
 601                         /* Done, waiting for next packet */
 602                         netif_wake_queue(self->netdev);
 603                 }
 604         } else {
 605                 /* Otherwise, allow the stack to send more packets */
 606                 netif_wake_queue(self->netdev);
 607         }
 608         spin_unlock_irqrestore(&self->lock, flags);
 609 }
 610
 611 /*------------------------------------------------------------------*/
 612 /*
 613  * Watchdog timer from the network layer.
 614  * After a predetermined timeout, if we don't give confirmation that
 615  * the packet has been sent (i.e. no call to netif_wake_queue()),
 616  * the network layer will call this function.
 617  * Note that URB that we submit have also a timeout. When the URB timeout
 618  * expire, the normal URB callback is called (write_bulk_callback()).
 619  */
 620 static void irda_usb_net_timeout(struct net_device *netdev)
 621 {
 622         unsigned long flags;
 623         struct irda_usb_cb *self = netdev_priv(netdev);
 624         struct urb *urb;
 625         int     done = 0;       /* If we have made any progress */
 626
 627         pr_debug("%s(), Network layer thinks we timed out!\n", __func__);
 628         IRDA_ASSERT(self != NULL, return;);
 629
 630         /* Protect us from USB callbacks, net Tx and else. */
 631         spin_lock_irqsave(&self->lock, flags);
 632
 633         /* self->present *MUST* be read under spinlock */
 634         if (!self->present) {
 635                 net_warn_ratelimited("%s(), device not present!\n", __func__);
 636                 netif_stop_queue(netdev);
 637                 spin_unlock_irqrestore(&self->lock, flags);
 638                 return;
 639         }
 640
 641         /* Check speed URB */
 642         urb = self->speed_urb;
 643         if (urb->status != 0) {
 644                 pr_debug("%s: Speed change timed out, urb->status=%d, urb->transfer_flags=0x%04X\n",
 645                          netdev->name, urb->status, urb->transfer_flags);
 646
 647                 switch (urb->status) {
 648                 case -EINPROGRESS:
 649                         usb_unlink_urb(urb);
 650                         /* Note : above will  *NOT* call netif_wake_queue()
 651                          * in completion handler, we will come back here.
 652                          * Jean II */
 653                         done = 1;
 654                         break;
 655                 case -ECONNRESET:
 656                 case -ENOENT:                   /* urb unlinked by us */
 657                 default:                        /* ??? - Play safe */
 658                         urb->status = 0;
 659                         netif_wake_queue(self->netdev);
 660                         done = 1;
 661                         break;
 662                 }
 663         }
 664
 665         /* Check Tx URB */
 666         urb = self->tx_urb;
 667         if (urb->status != 0) {
 668                 struct sk_buff *skb = urb->context;
 669
 670                 pr_debug("%s: Tx timed out, urb->status=%d, urb->transfer_flags=0x%04X\n",
 671                          netdev->name, urb->status, urb->transfer_flags);
 672
 673                 /* Increase error count */
 674                 netdev->stats.tx_errors++;
 675
 676 #ifdef IU_BUG_KICK_TIMEOUT
 677                 /* Can't be a bad idea to reset the speed ;-) - Jean II */
 678                 if(self->new_speed == -1)
 679                         self->new_speed = self->speed;
 680                 if(self->new_xbofs == -1)
 681                         self->new_xbofs = self->xbofs;
 682                 irda_usb_change_speed_xbofs(self);
 683 #endif /* IU_BUG_KICK_TIMEOUT */
 684
 685                 switch (urb->status) {
 686                 case -EINPROGRESS:
 687                         usb_unlink_urb(urb);
 688                         /* Note : above will  *NOT* call netif_wake_queue()
 689                          * in completion handler, because urb->status will
 690                          * be -ENOENT. We will fix that at the next watchdog,
 691                          * leaving more time to USB to recover...
 692                          * Jean II */
 693                         done = 1;
 694                         break;
 695                 case -ECONNRESET:
 696                 case -ENOENT:                   /* urb unlinked by us */
 697                 default:                        /* ??? - Play safe */
 698                         if(skb != NULL) {
 699                                 dev_kfree_skb_any(skb);
 700                                 urb->context = NULL;
 701                         }
 702                         urb->status = 0;
 703                         netif_wake_queue(self->netdev);
 704                         done = 1;
 705                         break;
 706                 }
 707         }
 708         spin_unlock_irqrestore(&self->lock, flags);
 709
 710         /* Maybe we need a reset */
 711         /* Note : Some drivers seem to use a usb_set_interface() when they
 712          * need to reset the hardware. Hum...
 713          */
 714
 715         /* if(done == 0) */
 716 }
 717
 718 /************************* RECEIVE ROUTINES *************************/
 719 /*
 720  * Receive packets from the USB layer stack and pass them to the IrDA stack.
 721  * Try to work around USB failures...
 722  */
 723
 724 /*
 725  * Note :
 726  * Some of you may have noticed that most dongle have an interrupt in pipe
 727  * that we don't use. Here is the little secret...
 728  * When we hang a Rx URB on the bulk in pipe, it generates some USB traffic
 729  * in every USB frame. This is unnecessary overhead.
 730  * The interrupt in pipe will generate an event every time a packet is
 731  * received. Reading an interrupt pipe adds minimal overhead, but has some
 732  * latency (~1ms).
 733  * If we are connected (speed != 9600), we want to minimise latency, so
 734  * we just always hang the Rx URB and ignore the interrupt.
 735  * If we are not connected (speed == 9600), there is usually no Rx traffic,
 736  * and we want to minimise the USB overhead. In this case we should wait
 737  * on the interrupt pipe and hang the Rx URB only when an interrupt is
 738  * received.
 739  * Jean II
 740  *
 741  * Note : don't read the above as what we are currently doing, but as
 742  * something we could do with KC dongle. Also don't forget that the
 743  * interrupt pipe is not part of the original standard, so this would
 744  * need to be optional...
 745  * Jean II
 746  */
 747
 748 /*------------------------------------------------------------------*/
 749 /*
 750  * Submit a Rx URB to the USB layer to handle reception of a frame
 751  * Mostly called by the completion callback of the previous URB.
 752  *
 753  * Jean II
 754  */
 755 static void irda_usb_submit(struct irda_usb_cb *self, struct sk_buff *skb, struct urb *urb)
 756 {
 757         struct irda_skb_cb *cb;
 758         int ret;
 759
 760         /* This should never happen */
 761         IRDA_ASSERT(skb != NULL, return;);
 762         IRDA_ASSERT(urb != NULL, return;);
 763
 764         /* Save ourselves in the skb */
 765         cb = (struct irda_skb_cb *) skb->cb;
 766         cb->context = self;
 767
 768         /* Reinitialize URB */
 769         usb_fill_bulk_urb(urb, self->usbdev,
 770                       usb_rcvbulkpipe(self->usbdev, self->bulk_in_ep),
 771                       skb->data, IRDA_SKB_MAX_MTU,
 772                       irda_usb_receive, skb);
 773         urb->status = 0;
 774
 775         /* Can be called from irda_usb_receive (irq handler) -> GFP_ATOMIC */
 776         ret = usb_submit_urb(urb, GFP_ATOMIC);
 777         if (ret) {
 778                 /* If this ever happen, we are in deep s***.
 779                  * Basically, the Rx path will stop... */
 780                 net_warn_ratelimited("%s(), Failed to submit Rx URB %d\n",
 781                                      __func__, ret);
 782         }
 783 }
 784
 785 /*------------------------------------------------------------------*/
 786 /*
 787  * Function irda_usb_receive(urb)
 788  *
 789  *     Called by the USB subsystem when a frame has been received
 790  *
 791  */
 792 static void irda_usb_receive(struct urb *urb)
 793 {
 794         struct sk_buff *skb = (struct sk_buff *) urb->context;
 795         struct irda_usb_cb *self;
 796         struct irda_skb_cb *cb;
 797         struct sk_buff *newskb;
 798         struct sk_buff *dataskb;
 799         struct urb *next_urb;
 800         unsigned int len, docopy;
 801
 802         pr_debug("%s(), len=%d\n", __func__, urb->actual_length);
 803
 804         /* Find ourselves */
 805         cb = (struct irda_skb_cb *) skb->cb;
 806         IRDA_ASSERT(cb != NULL, return;);
 807         self = (struct irda_usb_cb *) cb->context;
 808         IRDA_ASSERT(self != NULL, return;);
 809
 810         /* If the network is closed or the device gone, stop everything */
 811         if ((!self->netopen) || (!self->present)) {
 812                 pr_debug("%s(), Network is gone!\n", __func__);
 813                 /* Don't re-submit the URB : will stall the Rx path */
 814                 return;
 815         }
 816
 817         /* Check the status */
 818         if (urb->status != 0) {
 819                 switch (urb->status) {
 820                 case -EILSEQ:
 821                         self->netdev->stats.rx_crc_errors++;
 822                         /* Also precursor to a hot-unplug on UHCI. */
 823                         /* Fallthrough... */
 824                 case -ECONNRESET:
 825                         /* Random error, if I remember correctly */
 826                         /* uhci_cleanup_unlink() is going to kill the Rx
 827                          * URB just after we return. No problem, at this
 828                          * point the URB will be idle ;-) - Jean II */
 829                 case -ESHUTDOWN:
 830                         /* That's usually a hot-unplug. Submit will fail... */
 831                 case -ETIME:
 832                         /* Usually precursor to a hot-unplug on OHCI. */
 833                 default:
 834                         self->netdev->stats.rx_errors++;
 835                         pr_debug("%s(), RX status %d, transfer_flags 0x%04X\n",
 836                                  __func__, urb->status, urb->transfer_flags);
 837                         break;
 838                 }
 839                 /* If we received an error, we don't want to resubmit the
 840                  * Rx URB straight away but to give the USB layer a little
 841                  * bit of breathing room.
 842                  * We are in the USB thread context, therefore there is a
 843                  * danger of recursion (new URB we submit fails, we come
 844                  * back here).
 845                  * With recent USB stack (2.6.15+), I'm seeing that on
 846                  * hot unplug of the dongle...
 847                  * Lowest effective timer is 10ms...
 848                  * Jean II */
 849                 self->rx_defer_timer.function = irda_usb_rx_defer_expired;
 850                 self->rx_defer_timer.data = (unsigned long) urb;
 851                 mod_timer(&self->rx_defer_timer,
 852                           jiffies + msecs_to_jiffies(10));
 853
 854                 return;
 855         }
 856
 857         /* Check for empty frames */
 858         if (urb->actual_length <= self->header_length) {
 859                 net_warn_ratelimited("%s(), empty frame!\n", __func__);
 860                 goto done;
 861         }
 862
 863         /*
 864          * Remember the time we received this frame, so we can
 865          * reduce the min turn time a bit since we will know
 866          * how much time we have used for protocol processing
 867          */
 868         self->stamp = ktime_get();
 869
 870         /* Check if we need to copy the data to a new skb or not.
 871          * For most frames, we use ZeroCopy and pass the already
 872          * allocated skb up the stack.
 873          * If the frame is small, it is more efficient to copy it
 874          * to save memory (copy will be fast anyway - that's
 875          * called Rx-copy-break). Jean II */
 876         docopy = (urb->actual_length < IRDA_RX_COPY_THRESHOLD);
 877
 878         /* Allocate a new skb */
 879         if (self->capability & IUC_STIR421X)
 880                 newskb = dev_alloc_skb(docopy ? urb->actual_length :
 881                                        IRDA_SKB_MAX_MTU +
 882                                        USB_IRDA_STIR421X_HEADER);
 883         else
 884                 newskb = dev_alloc_skb(docopy ? urb->actual_length :
 885                                        IRDA_SKB_MAX_MTU);
 886
 887         if (!newskb)  {
 888                 self->netdev->stats.rx_dropped++;
 889                 /* We could deliver the current skb, but this would stall
 890                  * the Rx path. Better drop the packet... Jean II */
 891                 goto done;
 892         }
 893
 894         /* Make sure IP header get aligned (IrDA header is 5 bytes) */
 895         /* But IrDA-USB header is 1 byte. Jean II */
 896         //skb_reserve(newskb, USB_IRDA_HEADER - 1);
 897
 898         if(docopy) {
 899                 /* Copy packet, so we can recycle the original */
 900                 skb_copy_from_linear_data(skb, newskb->data, urb->actual_length);
 901                 /* Deliver this new skb */
 902                 dataskb = newskb;
 903                 /* And hook the old skb to the URB
 904                  * Note : we don't need to "clean up" the old skb,
 905                  * as we never touched it. Jean II */
 906         } else {
 907                 /* We are using ZeroCopy. Deliver old skb */
 908                 dataskb = skb;
 909                 /* And hook the new skb to the URB */
 910                 skb = newskb;
 911         }
 912
 913         /* Set proper length on skb & remove USB-IrDA header */
 914         skb_put(dataskb, urb->actual_length);
 915         skb_pull(dataskb, self->header_length);
 916
 917         /* Ask the networking layer to queue the packet for the IrDA stack */
 918         dataskb->dev = self->netdev;
 919         skb_reset_mac_header(dataskb);
 920         dataskb->protocol = htons(ETH_P_IRDA);
 921         len = dataskb->len;
 922         netif_rx(dataskb);
 923
 924         /* Keep stats up to date */
 925         self->netdev->stats.rx_bytes += len;
 926         self->netdev->stats.rx_packets++;
 927
 928 done:
 929         /* Note : at this point, the URB we've just received (urb)
 930          * is still referenced by the USB layer. For example, if we
 931          * have received a -ECONNRESET, uhci_cleanup_unlink() will
 932          * continue to process it (in fact, cleaning it up).
 933          * If we were to submit this URB, disaster would ensue.
 934          * Therefore, we submit our idle URB, and put this URB in our
 935          * idle slot....
 936          * Jean II */
 937         /* Note : with this scheme, we could submit the idle URB before
 938          * processing the Rx URB. I don't think it would buy us anything as
 939          * we are running in the USB thread context. Jean II */
 940         next_urb = self->idle_rx_urb;
 941
 942         /* Recycle Rx URB : Now, the idle URB is the present one */
 943         urb->context = NULL;
 944         self->idle_rx_urb = urb;
 945
 946         /* Submit the idle URB to replace the URB we've just received.
 947          * Do it last to avoid race conditions... Jean II */
 948         irda_usb_submit(self, skb, next_urb);
 949 }
 950
 951 /*------------------------------------------------------------------*/
 952 /*
 953  * In case of errors, we want the USB layer to have time to recover.
 954  * Now, it is time to resubmit ouur Rx URB...
 955  */
 956 static void irda_usb_rx_defer_expired(unsigned long data)
 957 {
 958         struct urb *urb = (struct urb *) data;
 959         struct sk_buff *skb = (struct sk_buff *) urb->context;
 960         struct irda_usb_cb *self;
 961         struct irda_skb_cb *cb;
 962         struct urb *next_urb;
 963
 964         /* Find ourselves */
 965         cb = (struct irda_skb_cb *) skb->cb;
 966         IRDA_ASSERT(cb != NULL, return;);
 967         self = (struct irda_usb_cb *) cb->context;
 968         IRDA_ASSERT(self != NULL, return;);
 969
 970         /* Same stuff as when Rx is done, see above... */
 971         next_urb = self->idle_rx_urb;
 972         urb->context = NULL;
 973         self->idle_rx_urb = urb;
 974         irda_usb_submit(self, skb, next_urb);
 975 }
 976
 977 /*------------------------------------------------------------------*/
 978 /*
 979  * Callbak from IrDA layer. IrDA wants to know if we have
 980  * started receiving anything.
 981  */
 982 static int irda_usb_is_receiving(struct irda_usb_cb *self)
 983 {
 984         /* Note : because of the way UHCI works, it's almost impossible
 985          * to get this info. The Controller DMA directly to memory and
 986          * signal only when the whole frame is finished. To know if the
 987          * first TD of the URB has been filled or not seems hard work...
 988          *
 989          * The other solution would be to use the "receiving" command
 990          * on the default decriptor with a usb_control_msg(), but that
 991          * would add USB traffic and would return result only in the
 992          * next USB frame (~1ms).
 993          *
 994          * I've been told that current dongles send status info on their
 995          * interrupt endpoint, and that's what the Windows driver uses
 996          * to know this info. Unfortunately, this is not yet in the spec...
 997          *
 998          * Jean II
 999          */
1000
1001         return 0; /* For now */
1002 }
1003
1004 #define STIR421X_PATCH_PRODUCT_VER     "Product Version: "
1005 #define STIR421X_PATCH_STMP_TAG        "STMP"
1006 #define STIR421X_PATCH_CODE_OFFSET     512 /* patch image starts before here */
1007 /* marks end of patch file header (PC DOS text file EOF character) */
1008 #define STIR421X_PATCH_END_OF_HDR_TAG  0x1A
1009 #define STIR421X_PATCH_BLOCK_SIZE      1023
1010
1011 /*
1012  * Function stir421x_fwupload (struct irda_usb_cb *self,
1013  *                             unsigned char *patch,
1014  *                             const unsigned int patch_len)
1015  *
1016  *   Upload firmware code to SigmaTel 421X IRDA-USB dongle
1017  */
1018 static int stir421x_fw_upload(struct irda_usb_cb *self,
1019                              const unsigned char *patch,
1020                              const unsigned int patch_len)
1021 {
1022         int ret = -ENOMEM;
1023         int actual_len = 0;
1024         unsigned int i;
1025         unsigned int block_size = 0;
1026         unsigned char *patch_block;
1027
1028         patch_block = kzalloc(STIR421X_PATCH_BLOCK_SIZE, GFP_KERNEL);
1029         if (patch_block == NULL)
1030                 return -ENOMEM;
1031
1032         /* break up patch into 1023-byte sections */
1033         for (i = 0; i < patch_len; i += block_size) {
1034                 block_size = patch_len - i;
1035
1036                 if (block_size > STIR421X_PATCH_BLOCK_SIZE)
1037                         block_size = STIR421X_PATCH_BLOCK_SIZE;
1038
1039                 /* upload the patch section */
1040                 memcpy(patch_block, patch + i, block_size);
1041
1042                 ret = usb_bulk_msg(self->usbdev,
1043                                    usb_sndbulkpipe(self->usbdev,
1044                                                    self->bulk_out_ep),
1045                                    patch_block, block_size,
1046                                    &actual_len, msecs_to_jiffies(500));
1047                 pr_debug("%s(): Bulk send %u bytes, ret=%d\n",
1048                          __func__, actual_len, ret);
1049
1050                 if (ret < 0)
1051                         break;
1052
1053                 mdelay(10);
1054         }
1055
1056         kfree(patch_block);
1057
1058         return ret;
1059  }
1060
1061 /*
1062  * Function stir421x_patch_device(struct irda_usb_cb *self)
1063  *
1064  * Get a firmware code from userspase using hotplug request_firmware() call
1065   */
1066 static int stir421x_patch_device(struct irda_usb_cb *self)
1067 {
1068         unsigned int i;
1069         int ret;
1070         char stir421x_fw_name[12];
1071         const struct firmware *fw;
1072         const unsigned char *fw_version_ptr; /* pointer to version string */
1073         unsigned long fw_version = 0;
1074
1075         /*
1076          * Known firmware patch file names for STIR421x dongles
1077          * are "42101001.sb" or "42101002.sb"
1078          */
1079         sprintf(stir421x_fw_name, "4210%4X.sb",
1080                 self->usbdev->descriptor.bcdDevice);
1081         ret = request_firmware(&fw, stir421x_fw_name, &self->usbdev->dev);
1082         if (ret < 0)
1083                 return ret;
1084
1085         /* We get a patch from userspace */
1086         net_info_ratelimited("%s(): Received firmware %s (%zu bytes)\n",
1087                              __func__, stir421x_fw_name, fw->size);
1088
1089         ret = -EINVAL;
1090
1091         /* Get the bcd product version */
1092         if (!memcmp(fw->data, STIR421X_PATCH_PRODUCT_VER,
1093                     sizeof(STIR421X_PATCH_PRODUCT_VER) - 1)) {
1094                 fw_version_ptr = fw->data +
1095                         sizeof(STIR421X_PATCH_PRODUCT_VER) - 1;
1096
1097                 /* Let's check if the product version is dotted */
1098                 if (fw_version_ptr[3] == '.' &&
1099                     fw_version_ptr[7] == '.') {
1100                         unsigned long major, minor, build;
1101                         major = simple_strtoul(fw_version_ptr, NULL, 10);
1102                         minor = simple_strtoul(fw_version_ptr + 4, NULL, 10);
1103                         build = simple_strtoul(fw_version_ptr + 8, NULL, 10);
1104
1105                         fw_version = (major << 12)
1106                                 + (minor << 8)
1107                                 + ((build / 10) << 4)
1108                                 + (build % 10);
1109
1110                         pr_debug("%s(): Firmware Product version %ld\n",
1111                                  __func__, fw_version);
1112                 }
1113         }
1114
1115         if (self->usbdev->descriptor.bcdDevice == cpu_to_le16(fw_version)) {
1116                 /*
1117                  * If we're here, we've found a correct patch
1118                  * The actual image starts after the "STMP" keyword
1119                  * so forward to the firmware header tag
1120                  */
1121                 for (i = 0; i < fw->size && fw->data[i] !=
1122                              STIR421X_PATCH_END_OF_HDR_TAG; i++) ;
1123                 /* here we check for the out of buffer case */
1124                 if (i < STIR421X_PATCH_CODE_OFFSET && i < fw->size &&
1125                                 STIR421X_PATCH_END_OF_HDR_TAG == fw->data[i]) {
1126                         if (!memcmp(fw->data + i + 1, STIR421X_PATCH_STMP_TAG,
1127                                     sizeof(STIR421X_PATCH_STMP_TAG) - 1)) {
1128
1129                                 /* We can upload the patch to the target */
1130                                 i += sizeof(STIR421X_PATCH_STMP_TAG);
1131                                 ret = stir421x_fw_upload(self, &fw->data[i],
1132                                                          fw->size - i);
1133                         }
1134                 }
1135         }
1136
1137         release_firmware(fw);
1138
1139         return ret;
1140 }
1141
1142
1143 /********************** IRDA DEVICE CALLBACKS **********************/
1144 /*
1145  * Main calls from the IrDA/Network subsystem.
1146  * Mostly registering a new irda-usb device and removing it....
1147  * We only deal with the IrDA side of the business, the USB side will
1148  * be dealt with below...
1149  */
1150
1151
1152 /*------------------------------------------------------------------*/
1153 /*
1154  * Function irda_usb_net_open (dev)
1155  *
1156  *    Network device is taken up. Usually this is done by "ifconfig irda0 up"
1157  *
1158  * Note : don't mess with self->netopen - Jean II
1159  */
1160 static int irda_usb_net_open(struct net_device *netdev)
1161 {
1162         struct irda_usb_cb *self;
1163         unsigned long flags;
1164         char    hwname[16];
1165         int i;
1166
1167         IRDA_ASSERT(netdev != NULL, return -1;);
1168         self = netdev_priv(netdev);
1169         IRDA_ASSERT(self != NULL, return -1;);
1170
1171         spin_lock_irqsave(&self->lock, flags);
1172         /* Can only open the device if it's there */
1173         if(!self->present) {
1174                 spin_unlock_irqrestore(&self->lock, flags);
1175                 net_warn_ratelimited("%s(), device not present!\n", __func__);
1176                 return -1;
1177         }
1178
1179         if(self->needspatch) {
1180                 spin_unlock_irqrestore(&self->lock, flags);
1181                 net_warn_ratelimited("%s(), device needs patch\n", __func__);
1182                 return -EIO ;
1183         }
1184
1185         /* Initialise default speed and xbofs value
1186          * (IrLAP will change that soon) */
1187         self->speed = -1;
1188         self->xbofs = -1;
1189         self->new_speed = -1;
1190         self->new_xbofs = -1;
1191
1192         /* To do *before* submitting Rx urbs and starting net Tx queue
1193          * Jean II */
1194         self->netopen = 1;
1195         spin_unlock_irqrestore(&self->lock, flags);
1196
1197         /*
1198          * Now that everything should be initialized properly,
1199          * Open new IrLAP layer instance to take care of us...
1200          * Note : will send immediately a speed change...
1201          */
1202         sprintf(hwname, "usb#%d", self->usbdev->devnum);
1203         self->irlap = irlap_open(netdev, &self->qos, hwname);
1204         IRDA_ASSERT(self->irlap != NULL, return -1;);
1205
1206         /* Allow IrLAP to send data to us */
1207         netif_start_queue(netdev);
1208
1209         /* We submit all the Rx URB except for one that we keep idle.
1210          * Need to be initialised before submitting other USBs, because
1211          * in some cases as soon as we submit the URBs the USB layer
1212          * will trigger a dummy receive - Jean II */
1213         self->idle_rx_urb = self->rx_urb[IU_MAX_ACTIVE_RX_URBS];
1214         self->idle_rx_urb->context = NULL;
1215
1216         /* Now that we can pass data to IrLAP, allow the USB layer
1217          * to send us some data... */
1218         for (i = 0; i < IU_MAX_ACTIVE_RX_URBS; i++) {
1219                 struct sk_buff *skb = dev_alloc_skb(IRDA_SKB_MAX_MTU);
1220                 if (!skb) {
1221                         /* If this ever happen, we are in deep s***.
1222                          * Basically, we can't start the Rx path... */
1223                         return -1;
1224                 }
1225                 //skb_reserve(newskb, USB_IRDA_HEADER - 1);
1226                 irda_usb_submit(self, skb, self->rx_urb[i]);
1227         }
1228
1229         /* Ready to play !!! */
1230         return 0;
1231 }
1232
1233 /*------------------------------------------------------------------*/
1234 /*
1235  * Function irda_usb_net_close (self)
1236  *
1237  *    Network device is taken down. Usually this is done by
1238  *    "ifconfig irda0 down"
1239  */
1240 static int irda_usb_net_close(struct net_device *netdev)
1241 {
1242         struct irda_usb_cb *self;
1243         int     i;
1244
1245         IRDA_ASSERT(netdev != NULL, return -1;);
1246         self = netdev_priv(netdev);
1247         IRDA_ASSERT(self != NULL, return -1;);
1248
1249         /* Clear this flag *before* unlinking the urbs and *before*
1250          * stopping the network Tx queue - Jean II */
1251         self->netopen = 0;
1252
1253         /* Stop network Tx queue */
1254         netif_stop_queue(netdev);
1255
1256         /* Kill defered Rx URB */
1257         del_timer(&self->rx_defer_timer);
1258
1259         /* Deallocate all the Rx path buffers (URBs and skb) */
1260         for (i = 0; i < self->max_rx_urb; i++) {
1261                 struct urb *urb = self->rx_urb[i];
1262                 struct sk_buff *skb = (struct sk_buff *) urb->context;
1263                 /* Cancel the receive command */
1264                 usb_kill_urb(urb);
1265                 /* The skb is ours, free it */
1266                 if(skb) {
1267                         dev_kfree_skb(skb);
1268                         urb->context = NULL;
1269                 }
1270         }
1271         /* Cancel Tx and speed URB - need to be synchronous to avoid races */
1272         usb_kill_urb(self->tx_urb);
1273         usb_kill_urb(self->speed_urb);
1274
1275         /* Stop and remove instance of IrLAP */
1276         if (self->irlap)
1277                 irlap_close(self->irlap);
1278         self->irlap = NULL;
1279
1280         return 0;
1281 }
1282
1283 /*------------------------------------------------------------------*/
1284 /*
1285  * IOCTLs : Extra out-of-band network commands...
1286  */
1287 static int irda_usb_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1288 {
1289         unsigned long flags;
1290         struct if_irda_req *irq = (struct if_irda_req *) rq;
1291         struct irda_usb_cb *self;
1292         int ret = 0;
1293
1294         IRDA_ASSERT(dev != NULL, return -1;);
1295         self = netdev_priv(dev);
1296         IRDA_ASSERT(self != NULL, return -1;);
1297
1298         pr_debug("%s(), %s, (cmd=0x%X)\n", __func__, dev->name, cmd);
1299
1300         switch (cmd) {
1301         case SIOCSBANDWIDTH: /* Set bandwidth */
1302                 if (!capable(CAP_NET_ADMIN))
1303                         return -EPERM;
1304                 /* Protect us from USB callbacks, net watchdog and else. */
1305                 spin_lock_irqsave(&self->lock, flags);
1306                 /* Check if the device is still there */
1307                 if(self->present) {
1308                         /* Set the desired speed */
1309                         self->new_speed = irq->ifr_baudrate;
1310                         irda_usb_change_speed_xbofs(self);
1311                 }
1312                 spin_unlock_irqrestore(&self->lock, flags);
1313                 break;
1314         case SIOCSMEDIABUSY: /* Set media busy */
1315                 if (!capable(CAP_NET_ADMIN))
1316                         return -EPERM;
1317                 /* Check if the IrDA stack is still there */
1318                 if(self->netopen)
1319                         irda_device_set_media_busy(self->netdev, TRUE);
1320                 break;
1321         case SIOCGRECEIVING: /* Check if we are receiving right now */
1322                 irq->ifr_receiving = irda_usb_is_receiving(self);
1323                 break;
1324         default:
1325                 ret = -EOPNOTSUPP;
1326         }
1327
1328         return ret;
1329 }
1330
1331 /*------------------------------------------------------------------*/
1332
1333 /********************* IRDA CONFIG SUBROUTINES *********************/
1334 /*
1335  * Various subroutines dealing with IrDA and network stuff we use to
1336  * configure and initialise each irda-usb instance.
1337  * These functions are used below in the main calls of the driver...
1338  */
1339
1340 /*------------------------------------------------------------------*/
1341 /*
1342  * Set proper values in the IrDA QOS structure
1343  */
1344 static inline void irda_usb_init_qos(struct irda_usb_cb *self)
1345 {
1346         struct irda_class_desc *desc;
1347
1348
1349         desc = self->irda_desc;
1350
1351         /* Initialize QoS for this device */
1352         irda_init_max_qos_capabilies(&self->qos);
1353
1354         /* See spec section 7.2 for meaning.
1355          * Values are little endian (as most USB stuff), the IrDA stack
1356          * use it in native order (see parameters.c). - Jean II */
1357         self->qos.baud_rate.bits       = le16_to_cpu(desc->wBaudRate);
1358         self->qos.min_turn_time.bits   = desc->bmMinTurnaroundTime;
1359         self->qos.additional_bofs.bits = desc->bmAdditionalBOFs;
1360         self->qos.window_size.bits     = desc->bmWindowSize;
1361         self->qos.data_size.bits       = desc->bmDataSize;
1362
1363         pr_debug("%s(), dongle says speed=0x%X, size=0x%X, window=0x%X, bofs=0x%X, turn=0x%X\n",
1364                  __func__, self->qos.baud_rate.bits, self->qos.data_size.bits,
1365                  self->qos.window_size.bits, self->qos.additional_bofs.bits,
1366                  self->qos.min_turn_time.bits);
1367
1368         /* Don't always trust what the dongle tell us */
1369         if(self->capability & IUC_SIR_ONLY)
1370                 self->qos.baud_rate.bits        &= 0x00ff;
1371         if(self->capability & IUC_SMALL_PKT)
1372                 self->qos.data_size.bits         = 0x07;
1373         if(self->capability & IUC_NO_WINDOW)
1374                 self->qos.window_size.bits       = 0x01;
1375         if(self->capability & IUC_MAX_WINDOW)
1376                 self->qos.window_size.bits       = 0x7f;
1377         if(self->capability & IUC_MAX_XBOFS)
1378                 self->qos.additional_bofs.bits   = 0x01;
1379
1380 #if 1
1381         /* Module parameter can override the rx window size */
1382         if (qos_mtt_bits)
1383                 self->qos.min_turn_time.bits = qos_mtt_bits;
1384 #endif
1385         /*
1386          * Note : most of those values apply only for the receive path,
1387          * the transmit path will be set differently - Jean II
1388          */
1389         irda_qos_bits_to_value(&self->qos);
1390 }
1391
1392 /*------------------------------------------------------------------*/
1393 static const struct net_device_ops irda_usb_netdev_ops = {
1394         .ndo_open       = irda_usb_net_open,
1395         .ndo_stop       = irda_usb_net_close,
1396         .ndo_do_ioctl   = irda_usb_net_ioctl,
1397         .ndo_start_xmit = irda_usb_hard_xmit,
1398         .ndo_tx_timeout = irda_usb_net_timeout,
1399 };
1400
1401 /*
1402  * Initialise the network side of the irda-usb instance
1403  * Called when a new USB instance is registered in irda_usb_probe()
1404  */
1405 static inline int irda_usb_open(struct irda_usb_cb *self)
1406 {
1407         struct net_device *netdev = self->netdev;
1408
1409         netdev->netdev_ops = &irda_usb_netdev_ops;
1410
1411         irda_usb_init_qos(self);
1412
1413         return register_netdev(netdev);
1414 }
1415
1416 /*------------------------------------------------------------------*/
1417 /*
1418  * Cleanup the network side of the irda-usb instance
1419  * Called when a USB instance is removed in irda_usb_disconnect()
1420  */
1421 static inline void irda_usb_close(struct irda_usb_cb *self)
1422 {
1423         /* Remove netdevice */
1424         unregister_netdev(self->netdev);
1425
1426         /* Remove the speed buffer */
1427         kfree(self->speed_buff);
1428         self->speed_buff = NULL;
1429
1430         kfree(self->tx_buff);
1431         self->tx_buff = NULL;
1432 }
1433
1434 /********************** USB CONFIG SUBROUTINES **********************/
1435 /*
1436  * Various subroutines dealing with USB stuff we use to configure and
1437  * initialise each irda-usb instance.
1438  * These functions are used below in the main calls of the driver...
1439  */
1440
1441 /*------------------------------------------------------------------*/
1442 /*
1443  * Function irda_usb_parse_endpoints(dev, ifnum)
1444  *
1445  *    Parse the various endpoints and find the one we need.
1446  *
1447  * The endpoint are the pipes used to communicate with the USB device.
1448  * The spec defines 2 endpoints of type bulk transfer, one in, and one out.
1449  * These are used to pass frames back and forth with the dongle.
1450  * Most dongle have also an interrupt endpoint, that will be probably
1451  * documented in the next spec...
1452  */
1453 static inline int irda_usb_parse_endpoints(struct irda_usb_cb *self, struct usb_host_endpoint *endpoint, int ennum)
1454 {
1455         int i;          /* Endpoint index in table */
1456
1457         /* Init : no endpoints */
1458         self->bulk_in_ep = 0;
1459         self->bulk_out_ep = 0;
1460         self->bulk_int_ep = 0;
1461
1462         /* Let's look at all those endpoints */
1463         for(i = 0; i < ennum; i++) {
1464                 /* All those variables will get optimised by the compiler,
1465                  * so let's aim for clarity... - Jean II */
1466                 __u8 ep;        /* Endpoint address */
1467                 __u8 dir;       /* Endpoint direction */
1468                 __u8 attr;      /* Endpoint attribute */
1469                 __u16 psize;    /* Endpoint max packet size in bytes */
1470
1471                 /* Get endpoint address, direction and attribute */
1472                 ep = endpoint[i].desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1473                 dir = endpoint[i].desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK;
1474                 attr = endpoint[i].desc.bmAttributes;
1475                 psize = le16_to_cpu(endpoint[i].desc.wMaxPacketSize);
1476
1477                 /* Is it a bulk endpoint ??? */
1478                 if(attr == USB_ENDPOINT_XFER_BULK) {
1479                         /* We need to find an IN and an OUT */
1480                         if(dir == USB_DIR_IN) {
1481                                 /* This is our Rx endpoint */
1482                                 self->bulk_in_ep = ep;
1483                         } else {
1484                                 /* This is our Tx endpoint */
1485                                 self->bulk_out_ep = ep;
1486                                 self->bulk_out_mtu = psize;
1487                         }
1488                 } else {
1489                         if((attr == USB_ENDPOINT_XFER_INT) &&
1490                            (dir == USB_DIR_IN)) {
1491                                 /* This is our interrupt endpoint */
1492                                 self->bulk_int_ep = ep;
1493                         } else {
1494                                 net_err_ratelimited("%s(), Unrecognised endpoint %02X\n",
1495                                                     __func__, ep);
1496                         }
1497                 }
1498         }
1499
1500         pr_debug("%s(), And our endpoints are : in=%02X, out=%02X (%d), int=%02X\n",
1501                  __func__, self->bulk_in_ep, self->bulk_out_ep,
1502                  self->bulk_out_mtu, self->bulk_int_ep);
1503
1504         return (self->bulk_in_ep != 0) && (self->bulk_out_ep != 0);
1505 }
1506
1507 #ifdef IU_DUMP_CLASS_DESC
1508 /*------------------------------------------------------------------*/
1509 /*
1510  * Function usb_irda_dump_class_desc(desc)
1511  *
1512  *    Prints out the contents of the IrDA class descriptor
1513  *
1514  */
1515 static inline void irda_usb_dump_class_desc(struct irda_class_desc *desc)
1516 {
1517         /* Values are little endian */
1518         printk("bLength=%x\n", desc->bLength);
1519         printk("bDescriptorType=%x\n", desc->bDescriptorType);
1520         printk("bcdSpecRevision=%x\n", le16_to_cpu(desc->bcdSpecRevision));
1521         printk("bmDataSize=%x\n", desc->bmDataSize);
1522         printk("bmWindowSize=%x\n", desc->bmWindowSize);
1523         printk("bmMinTurnaroundTime=%d\n", desc->bmMinTurnaroundTime);
1524         printk("wBaudRate=%x\n", le16_to_cpu(desc->wBaudRate));
1525         printk("bmAdditionalBOFs=%x\n", desc->bmAdditionalBOFs);
1526         printk("bIrdaRateSniff=%x\n", desc->bIrdaRateSniff);
1527         printk("bMaxUnicastList=%x\n", desc->bMaxUnicastList);
1528 }
1529 #endif /* IU_DUMP_CLASS_DESC */
1530
1531 /*------------------------------------------------------------------*/
1532 /*
1533  * Function irda_usb_find_class_desc(intf)
1534  *
1535  *    Returns instance of IrDA class descriptor, or NULL if not found
1536  *
1537  * The class descriptor is some extra info that IrDA USB devices will
1538  * offer to us, describing their IrDA characteristics. We will use that in
1539  * irda_usb_init_qos()
1540  */
1541 static inline struct irda_class_desc *irda_usb_find_class_desc(struct usb_interface *intf)
1542 {
1543         struct usb_device *dev = interface_to_usbdev (intf);
1544         struct irda_class_desc *desc;
1545         int ret;
1546
1547         desc = kzalloc(sizeof(*desc), GFP_KERNEL);
1548         if (!desc)
1549                 return NULL;
1550
1551         /* USB-IrDA class spec 1.0:
1552          *      6.1.3: Standard "Get Descriptor" Device Request is not
1553          *             appropriate to retrieve class-specific descriptor
1554          *      6.2.5: Class Specific "Get Class Descriptor" Interface Request
1555          *             is mandatory and returns the USB-IrDA class descriptor
1556          */
1557
1558         ret = usb_control_msg(dev, usb_rcvctrlpipe(dev,0),
1559                 IU_REQ_GET_CLASS_DESC,
1560                 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
1561                 0, intf->altsetting->desc.bInterfaceNumber, desc,
1562                 sizeof(*desc), 500);
1563
1564         pr_debug("%s(), ret=%d\n", __func__, ret);
1565         if (ret < sizeof(*desc)) {
1566                 net_warn_ratelimited("usb-irda: class_descriptor read %s (%d)\n",
1567                                      ret < 0 ? "failed" : "too short", ret);
1568         }
1569         else if (desc->bDescriptorType != USB_DT_IRDA) {
1570                 net_warn_ratelimited("usb-irda: bad class_descriptor type\n");
1571         }
1572         else {
1573 #ifdef IU_DUMP_CLASS_DESC
1574                 irda_usb_dump_class_desc(desc);
1575 #endif  /* IU_DUMP_CLASS_DESC */
1576
1577                 return desc;
1578         }
1579         kfree(desc);
1580         return NULL;
1581 }
1582
1583 /*********************** USB DEVICE CALLBACKS ***********************/
1584 /*
1585  * Main calls from the USB subsystem.
1586  * Mostly registering a new irda-usb device and removing it....
1587  */
1588
1589 /*------------------------------------------------------------------*/
1590 /*
1591  * This routine is called by the USB subsystem for each new device
1592  * in the system. We need to check if the device is ours, and in
1593  * this case start handling it.
1594  * The USB layer protect us from reentrancy (via BKL), so we don't need
1595  * to spinlock in there... Jean II
1596  */
1597 static int irda_usb_probe(struct usb_interface *intf,
1598                           const struct usb_device_id *id)
1599 {
1600         struct net_device *net;
1601         struct usb_device *dev = interface_to_usbdev(intf);
1602         struct irda_usb_cb *self;
1603         struct usb_host_interface *interface;
1604         struct irda_class_desc *irda_desc;
1605         int ret = -ENOMEM;
1606         int i;          /* Driver instance index / Rx URB index */
1607
1608         /* Note : the probe make sure to call us only for devices that
1609          * matches the list of dongle (top of the file). So, we
1610          * don't need to check if the dongle is really ours.
1611          * Jean II */
1612
1613         net_info_ratelimited("IRDA-USB found at address %d, Vendor: %x, Product: %x\n",
1614                              dev->devnum, le16_to_cpu(dev->descriptor.idVendor),
1615                              le16_to_cpu(dev->descriptor.idProduct));
1616
1617         net = alloc_irdadev(sizeof(*self));
1618         if (!net)
1619                 goto err_out;
1620
1621         SET_NETDEV_DEV(net, &intf->dev);
1622         self = netdev_priv(net);
1623         self->netdev = net;
1624         spin_lock_init(&self->lock);
1625         init_timer(&self->rx_defer_timer);
1626
1627         self->capability = id->driver_info;
1628         self->needspatch = ((self->capability & IUC_STIR421X) != 0);
1629
1630         /* Create all of the needed urbs */
1631         if (self->capability & IUC_STIR421X) {
1632                 self->max_rx_urb = IU_SIGMATEL_MAX_RX_URBS;
1633                 self->header_length = USB_IRDA_STIR421X_HEADER;
1634         } else {
1635                 self->max_rx_urb = IU_MAX_RX_URBS;
1636                 self->header_length = USB_IRDA_HEADER;
1637         }
1638
1639         self->rx_urb = kcalloc(self->max_rx_urb, sizeof(struct urb *),
1640                                 GFP_KERNEL);
1641         if (!self->rx_urb)
1642                 goto err_free_net;
1643
1644         for (i = 0; i < self->max_rx_urb; i++) {
1645                 self->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
1646                 if (!self->rx_urb[i]) {
1647                         goto err_out_1;
1648                 }
1649         }
1650         self->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1651         if (!self->tx_urb) {
1652                 goto err_out_1;
1653         }
1654         self->speed_urb = usb_alloc_urb(0, GFP_KERNEL);
1655         if (!self->speed_urb) {
1656                 goto err_out_2;
1657         }
1658
1659         /* Is this really necessary? (no, except maybe for broken devices) */
1660         if (usb_reset_configuration (dev) < 0) {
1661                 dev_err(&intf->dev, "reset_configuration failed\n");
1662                 ret = -EIO;
1663                 goto err_out_3;
1664         }
1665
1666         /* Is this really necessary? */
1667         /* Note : some driver do hardcode the interface number, some others
1668          * specify an alternate, but very few driver do like this.
1669          * Jean II */
1670         ret = usb_set_interface(dev, intf->altsetting->desc.bInterfaceNumber, 0);
1671         pr_debug("usb-irda: set interface %d result %d\n",
1672                  intf->altsetting->desc.bInterfaceNumber, ret);
1673         switch (ret) {
1674                 case 0:
1675                         break;
1676                 case -EPIPE:            /* -EPIPE = -32 */
1677                         /* Martin Diehl says if we get a -EPIPE we should
1678                          * be fine and we don't need to do a usb_clear_halt().
1679                          * - Jean II */
1680                         pr_debug("%s(), Received -EPIPE, ignoring...\n",
1681                                  __func__);
1682                         break;
1683                 default:
1684                         pr_debug("%s(), Unknown error %d\n", __func__, ret);
1685                         ret = -EIO;
1686                         goto err_out_3;
1687         }
1688
1689         /* Find our endpoints */
1690         interface = intf->cur_altsetting;
1691         if(!irda_usb_parse_endpoints(self, interface->endpoint,
1692                                      interface->desc.bNumEndpoints)) {
1693                 net_err_ratelimited("%s(), Bogus endpoints...\n", __func__);
1694                 ret = -EIO;
1695                 goto err_out_3;
1696         }
1697
1698         self->usbdev = dev;
1699
1700         /* Find IrDA class descriptor */
1701         irda_desc = irda_usb_find_class_desc(intf);
1702         ret = -ENODEV;
1703         if (!irda_desc)
1704                 goto err_out_3;
1705
1706         if (self->needspatch) {
1707                 ret = usb_control_msg (self->usbdev, usb_sndctrlpipe (self->usbdev, 0),
1708                                        0x02, 0x40, 0, 0, NULL, 0, 500);
1709                 if (ret < 0) {
1710                         pr_debug("usb_control_msg failed %d\n", ret);
1711                         goto err_out_3;
1712                 } else {
1713                         mdelay(10);
1714                 }
1715         }
1716
1717         self->irda_desc =  irda_desc;
1718         self->present = 1;
1719         self->netopen = 0;
1720         self->usbintf = intf;
1721
1722         /* Allocate the buffer for speed changes */
1723         /* Don't change this buffer size and allocation without doing
1724          * some heavy and complete testing. Don't ask why :-(
1725          * Jean II */
1726         self->speed_buff = kzalloc(IRDA_USB_SPEED_MTU, GFP_KERNEL);
1727         if (!self->speed_buff)
1728                 goto err_out_3;
1729
1730         self->tx_buff = kzalloc(IRDA_SKB_MAX_MTU + self->header_length,
1731                                 GFP_KERNEL);
1732         if (!self->tx_buff)
1733                 goto err_out_4;
1734
1735         ret = irda_usb_open(self);
1736         if (ret)
1737                 goto err_out_5;
1738
1739         net_info_ratelimited("IrDA: Registered device %s\n", net->name);
1740         usb_set_intfdata(intf, self);
1741
1742         if (self->needspatch) {
1743                 /* Now we fetch and upload the firmware patch */
1744                 ret = stir421x_patch_device(self);
1745                 self->needspatch = (ret < 0);
1746                 if (self->needspatch) {
1747                         net_err_ratelimited("STIR421X: Couldn't upload patch\n");
1748                         goto err_out_6;
1749                 }
1750
1751                 /* replace IrDA class descriptor with what patched device is now reporting */
1752                 irda_desc = irda_usb_find_class_desc (self->usbintf);
1753                 if (!irda_desc) {
1754                         ret = -ENODEV;
1755                         goto err_out_6;
1756                 }
1757                 kfree(self->irda_desc);
1758                 self->irda_desc = irda_desc;
1759                 irda_usb_init_qos(self);
1760         }
1761
1762         return 0;
1763 err_out_6:
1764         unregister_netdev(self->netdev);
1765 err_out_5:
1766         kfree(self->tx_buff);
1767 err_out_4:
1768         kfree(self->speed_buff);
1769 err_out_3:
1770         /* Free all urbs that we may have created */
1771         usb_free_urb(self->speed_urb);
1772 err_out_2:
1773         usb_free_urb(self->tx_urb);
1774 err_out_1:
1775         for (i = 0; i < self->max_rx_urb; i++)
1776                 usb_free_urb(self->rx_urb[i]);
1777         kfree(self->rx_urb);
1778 err_free_net:
1779         free_netdev(net);
1780 err_out:
1781         return ret;
1782 }
1783
1784 /*------------------------------------------------------------------*/
1785 /*
1786  * The current irda-usb device is removed, the USB layer tell us
1787  * to shut it down...
1788  * One of the constraints is that when we exit this function,
1789  * we cannot use the usb_device no more. Gone. Destroyed. kfree().
1790  * Most other subsystem allow you to destroy the instance at a time
1791  * when it's convenient to you, to postpone it to a later date, but
1792  * not the USB subsystem.
1793  * So, we must make bloody sure that everything gets deactivated.
1794  * Jean II
1795  */
1796 static void irda_usb_disconnect(struct usb_interface *intf)
1797 {
1798         unsigned long flags;
1799         struct irda_usb_cb *self = usb_get_intfdata(intf);
1800         int i;
1801
1802         usb_set_intfdata(intf, NULL);
1803         if (!self)
1804                 return;
1805
1806         /* Make sure that the Tx path is not executing. - Jean II */
1807         spin_lock_irqsave(&self->lock, flags);
1808
1809         /* Oups ! We are not there any more.
1810          * This will stop/desactivate the Tx path. - Jean II */
1811         self->present = 0;
1812
1813         /* Kill defered Rx URB */
1814         del_timer(&self->rx_defer_timer);
1815
1816         /* We need to have irq enabled to unlink the URBs. That's OK,
1817          * at this point the Tx path is gone - Jean II */
1818         spin_unlock_irqrestore(&self->lock, flags);
1819
1820         /* Hum... Check if networking is still active (avoid races) */
1821         if((self->netopen) || (self->irlap)) {
1822                 /* Accept no more transmissions */
1823                 /*netif_device_detach(self->netdev);*/
1824                 netif_stop_queue(self->netdev);
1825                 /* Stop all the receive URBs. Must be synchronous. */
1826                 for (i = 0; i < self->max_rx_urb; i++)
1827                         usb_kill_urb(self->rx_urb[i]);
1828                 /* Cancel Tx and speed URB.
1829                  * Make sure it's synchronous to avoid races. */
1830                 usb_kill_urb(self->tx_urb);
1831                 usb_kill_urb(self->speed_urb);
1832         }
1833
1834         /* Cleanup the device stuff */
1835         irda_usb_close(self);
1836         /* No longer attached to USB bus */
1837         self->usbdev = NULL;
1838         self->usbintf = NULL;
1839
1840         /* Clean up our urbs */
1841         for (i = 0; i < self->max_rx_urb; i++)
1842                 usb_free_urb(self->rx_urb[i]);
1843         kfree(self->rx_urb);
1844         /* Clean up Tx and speed URB */
1845         usb_free_urb(self->tx_urb);
1846         usb_free_urb(self->speed_urb);
1847
1848         /* Free self and network device */
1849         free_netdev(self->netdev);
1850         pr_debug("%s(), USB IrDA Disconnected\n", __func__);
1851 }
1852
1853 #ifdef CONFIG_PM
1854 /* USB suspend, so power off the transmitter/receiver */
1855 static int irda_usb_suspend(struct usb_interface *intf, pm_message_t message)
1856 {
1857         struct irda_usb_cb *self = usb_get_intfdata(intf);
1858         int i;
1859
1860         netif_device_detach(self->netdev);
1861
1862         if (self->tx_urb != NULL)
1863                 usb_kill_urb(self->tx_urb);
1864         if (self->speed_urb != NULL)
1865                 usb_kill_urb(self->speed_urb);
1866         for (i = 0; i < self->max_rx_urb; i++) {
1867                 if (self->rx_urb[i] != NULL)
1868                         usb_kill_urb(self->rx_urb[i]);
1869         }
1870         return 0;
1871 }
1872
1873 /* Coming out of suspend, so reset hardware */
1874 static int irda_usb_resume(struct usb_interface *intf)
1875 {
1876         struct irda_usb_cb *self = usb_get_intfdata(intf);
1877         int i;
1878
1879         for (i = 0; i < self->max_rx_urb; i++) {
1880                 if (self->rx_urb[i] != NULL)
1881                         usb_submit_urb(self->rx_urb[i], GFP_KERNEL);
1882         }
1883
1884         netif_device_attach(self->netdev);
1885         return 0;
1886 }
1887 #endif
1888
1889 /*------------------------------------------------------------------*/
1890 /*
1891  * USB device callbacks
1892  */
1893 static struct usb_driver irda_driver = {
1894         .name           = "irda-usb",
1895         .probe          = irda_usb_probe,
1896         .disconnect     = irda_usb_disconnect,
1897         .id_table       = dongles,
1898 #ifdef CONFIG_PM
1899         .suspend        = irda_usb_suspend,
1900         .resume         = irda_usb_resume,
1901 #endif
1902 };
1903
1904 module_usb_driver(irda_driver);
1905
1906 /*
1907  * Module parameters
1908  */
1909 module_param(qos_mtt_bits, int, 0);
1910 MODULE_PARM_DESC(qos_mtt_bits, "Minimum Turn Time");
1911 MODULE_AUTHOR("Roman Weissgaerber <weissg@vienna.at>, Dag Brattli <dag@brattli.net>, Jean Tourrilhes <jt@hpl.hp.com> and Nick Fedchik <nick@fedchik.org.ua>");
1912 MODULE_DESCRIPTION("IrDA-USB Dongle Driver");
1913 MODULE_LICENSE("GPL");