linux/drivers/net/irda/irda-usb.c
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   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/init.h>
  62#include <linux/skbuff.h>
  63#include <linux/netdevice.h>
  64#include <linux/slab.h>
  65#include <linux/rtnetlink.h>
  66#include <linux/usb.h>
  67#include <linux/firmware.h>
  68
  69#include "irda-usb.h"
  70
  71/*------------------------------------------------------------------*/
  72
  73static int qos_mtt_bits = 0;
  74
  75/* These are the currently known IrDA USB dongles. Add new dongles here */
  76static struct usb_device_id dongles[] = {
  77        /* ACTiSYS Corp.,  ACT-IR2000U FIR-USB Adapter */
  78        { USB_DEVICE(0x9c4, 0x011), .driver_info = IUC_SPEED_BUG | IUC_NO_WINDOW },
  79        /* Look like ACTiSYS, Report : IBM Corp., IBM UltraPort IrDA */
  80        { USB_DEVICE(0x4428, 0x012), .driver_info = IUC_SPEED_BUG | IUC_NO_WINDOW },
  81        /* KC Technology Inc.,  KC-180 USB IrDA Device */
  82        { USB_DEVICE(0x50f, 0x180), .driver_info = IUC_SPEED_BUG | IUC_NO_WINDOW },
  83        /* Extended Systems, Inc.,  XTNDAccess IrDA USB (ESI-9685) */
  84        { USB_DEVICE(0x8e9, 0x100), .driver_info = IUC_SPEED_BUG | IUC_NO_WINDOW },
  85        /* SigmaTel STIR4210/4220/4116 USB IrDA (VFIR) Bridge */
  86        { USB_DEVICE(0x66f, 0x4210), .driver_info = IUC_STIR421X | IUC_SPEED_BUG },
  87        { USB_DEVICE(0x66f, 0x4220), .driver_info = IUC_STIR421X | IUC_SPEED_BUG },
  88        { USB_DEVICE(0x66f, 0x4116), .driver_info = IUC_STIR421X | IUC_SPEED_BUG },
  89        { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS |
  90          USB_DEVICE_ID_MATCH_INT_SUBCLASS,
  91          .bInterfaceClass = USB_CLASS_APP_SPEC,
  92          .bInterfaceSubClass = USB_CLASS_IRDA,
  93          .driver_info = IUC_DEFAULT, },
  94        { }, /* The end */
  95};
  96
  97/*
  98 * Important note :
  99 * Devices based on the SigmaTel chipset (0x66f, 0x4200) are not designed
 100 * using the "USB-IrDA specification" (yes, there exist such a thing), and
 101 * therefore not supported by this driver (don't add them above).
 102 * There is a Linux driver, stir4200, that support those USB devices.
 103 * Jean II
 104 */
 105
 106MODULE_DEVICE_TABLE(usb, dongles);
 107
 108/*------------------------------------------------------------------*/
 109
 110static void irda_usb_init_qos(struct irda_usb_cb *self) ;
 111static struct irda_class_desc *irda_usb_find_class_desc(struct usb_interface *intf);
 112static void irda_usb_disconnect(struct usb_interface *intf);
 113static void irda_usb_change_speed_xbofs(struct irda_usb_cb *self);
 114static netdev_tx_t irda_usb_hard_xmit(struct sk_buff *skb,
 115                                            struct net_device *dev);
 116static int irda_usb_open(struct irda_usb_cb *self);
 117static void irda_usb_close(struct irda_usb_cb *self);
 118static void speed_bulk_callback(struct urb *urb);
 119static void write_bulk_callback(struct urb *urb);
 120static void irda_usb_receive(struct urb *urb);
 121static void irda_usb_rx_defer_expired(unsigned long data);
 122static int irda_usb_net_open(struct net_device *dev);
 123static int irda_usb_net_close(struct net_device *dev);
 124static int irda_usb_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 125static void irda_usb_net_timeout(struct net_device *dev);
 126
 127/************************ TRANSMIT ROUTINES ************************/
 128/*
 129 * Receive packets from the IrDA stack and send them on the USB pipe.
 130 * Handle speed change, timeout and lot's of ugliness...
 131 */
 132
 133/*------------------------------------------------------------------*/
 134/*
 135 * Function irda_usb_build_header(self, skb, header)
 136 *
 137 *   Builds USB-IrDA outbound header
 138 *
 139 * When we send an IrDA frame over an USB pipe, we add to it a 1 byte
 140 * header. This function create this header with the proper values.
 141 *
 142 * Important note : the USB-IrDA spec 1.0 say very clearly in chapter 5.4.2.2
 143 * that the setting of the link speed and xbof number in this outbound header
 144 * should be applied *AFTER* the frame has been sent.
 145 * Unfortunately, some devices are not compliant with that... It seems that
 146 * reading the spec is far too difficult...
 147 * Jean II
 148 */
 149static void irda_usb_build_header(struct irda_usb_cb *self,
 150                                  __u8 *header,
 151                                  int   force)
 152{
 153        /* Here we check if we have an STIR421x chip,
 154         * and if either speed or xbofs (or both) needs
 155         * to be changed.
 156         */
 157        if (self->capability & IUC_STIR421X &&
 158            ((self->new_speed != -1) || (self->new_xbofs != -1))) {
 159
 160                /* With STIR421x, speed and xBOFs must be set at the same
 161                 * time, even if only one of them changes.
 162                 */
 163                if (self->new_speed == -1)
 164                        self->new_speed = self->speed ;
 165
 166                if (self->new_xbofs == -1)
 167                        self->new_xbofs = self->xbofs ;
 168        }
 169
 170        /* Set the link speed */
 171        if (self->new_speed != -1) {
 172                /* Hum... Ugly hack :-(
 173                 * Some device are not compliant with the spec and change
 174                 * parameters *before* sending the frame. - Jean II
 175                 */
 176                if ((self->capability & IUC_SPEED_BUG) &&
 177                    (!force) && (self->speed != -1)) {
 178                        /* No speed and xbofs change here
 179                         * (we'll do it later in the write callback) */
 180                        IRDA_DEBUG(2, "%s(), not changing speed yet\n", __func__);
 181                        *header = 0;
 182                        return;
 183                }
 184
 185                IRDA_DEBUG(2, "%s(), changing speed to %d\n", __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                IRDA_DEBUG(2, "%s(), changing xbofs to %d\n", __func__, self->new_xbofs);
 232                self->xbofs = self->new_xbofs;
 233                /* We will do ` self->new_xbofs = -1; ' in the completion
 234                 * handler just in case the current URB fail - Jean II */
 235
 236                switch (self->xbofs) {
 237                case 48:
 238                        *header |= 0x10;
 239                        break;
 240                case 28:
 241                case 24:        /* USB spec 1.0 says 24 */
 242                        *header |= 0x20;
 243                        break;
 244                default:
 245                case 12:
 246                        *header |= 0x30;
 247                        break;
 248                case 5: /* Bug in IrLAP spec? (should be 6) */
 249                case 6:
 250                        *header |= 0x40;
 251                        break;
 252                case 3:
 253                        *header |= 0x50;
 254                        break;
 255                case 2:
 256                        *header |= 0x60;
 257                        break;
 258                case 1:
 259                        *header |= 0x70;
 260                        break;
 261                case 0:
 262                        *header |= 0x80;
 263                        break;
 264                }
 265        }
 266}
 267
 268/*
 269*   calculate turnaround time for SigmaTel header
 270*/
 271static __u8 get_turnaround_time(struct sk_buff *skb)
 272{
 273        int turnaround_time = irda_get_mtt(skb);
 274
 275        if ( turnaround_time == 0 )
 276                return 0;
 277        else if ( turnaround_time <= 10 )
 278                return 1;
 279        else if ( turnaround_time <= 50 )
 280                return 2;
 281        else if ( turnaround_time <= 100 )
 282                return 3;
 283        else if ( turnaround_time <= 500 )
 284                return 4;
 285        else if ( turnaround_time <= 1000 )
 286                return 5;
 287        else if ( turnaround_time <= 5000 )
 288                return 6;
 289        else
 290                return 7;
 291}
 292
 293
 294/*------------------------------------------------------------------*/
 295/*
 296 * Send a command to change the speed of the dongle
 297 * Need to be called with spinlock on.
 298 */
 299static void irda_usb_change_speed_xbofs(struct irda_usb_cb *self)
 300{
 301        __u8 *frame;
 302        struct urb *urb;
 303        int ret;
 304
 305        IRDA_DEBUG(2, "%s(), speed=%d, xbofs=%d\n", __func__,
 306                   self->new_speed, self->new_xbofs);
 307
 308        /* Grab the speed URB */
 309        urb = self->speed_urb;
 310        if (urb->status != 0) {
 311                IRDA_WARNING("%s(), URB still in use!\n", __func__);
 312                return;
 313        }
 314
 315        /* Allocate the fake frame */
 316        frame = self->speed_buff;
 317
 318        /* Set the new speed and xbofs in this fake frame */
 319        irda_usb_build_header(self, frame, 1);
 320
 321        if (self->capability & IUC_STIR421X) {
 322                if (frame[0] == 0) return ; // do nothing if no change
 323                frame[1] = 0; // other parameters don't change here
 324                frame[2] = 0;
 325        }
 326
 327        /* Submit the 0 length IrDA frame to trigger new speed settings */
 328        usb_fill_bulk_urb(urb, self->usbdev,
 329                      usb_sndbulkpipe(self->usbdev, self->bulk_out_ep),
 330                      frame, IRDA_USB_SPEED_MTU,
 331                      speed_bulk_callback, self);
 332        urb->transfer_buffer_length = self->header_length;
 333        urb->transfer_flags = 0;
 334
 335        /* Irq disabled -> GFP_ATOMIC */
 336        if ((ret = usb_submit_urb(urb, GFP_ATOMIC))) {
 337                IRDA_WARNING("%s(), failed Speed URB\n", __func__);
 338        }
 339}
 340
 341/*------------------------------------------------------------------*/
 342/*
 343 * Speed URB callback
 344 * Now, we can only get called for the speed URB.
 345 */
 346static void speed_bulk_callback(struct urb *urb)
 347{
 348        struct irda_usb_cb *self = urb->context;
 349        
 350        IRDA_DEBUG(2, "%s()\n", __func__);
 351
 352        /* We should always have a context */
 353        IRDA_ASSERT(self != NULL, return;);
 354        /* We should always be called for the speed URB */
 355        IRDA_ASSERT(urb == self->speed_urb, return;);
 356
 357        /* Check for timeout and other USB nasties */
 358        if (urb->status != 0) {
 359                /* I get a lot of -ECONNABORTED = -103 here - Jean II */
 360                IRDA_DEBUG(0, "%s(), URB complete status %d, transfer_flags 0x%04X\n", __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 */
 385static 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        IRDA_DEBUG(4, "%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                IRDA_DEBUG(0, "%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                IRDA_WARNING("%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                        do_gettimeofday(&self->now);
 499                        diff = self->now.tv_usec - self->stamp.tv_usec;
 500#ifdef IU_USB_MIN_RTT
 501                        /* Factor in USB delays -> Get rid of udelay() that
 502                         * would be lost in the noise - Jean II */
 503                        diff += IU_USB_MIN_RTT;
 504#endif /* IU_USB_MIN_RTT */
 505                        /* If the usec counter did wraparound, the diff will
 506                         * go negative (tv_usec is a long), so we need to
 507                         * correct it by one second. Jean II */
 508                        if (diff < 0)
 509                                diff += 1000000;
 510
 511                        /* Check if the mtt is larger than the time we have
 512                         * already used by all the protocol processing
 513                         */
 514                        if (mtt > diff) {
 515                                mtt -= diff;
 516                                if (mtt > 1000)
 517                                        mdelay(mtt/1000);
 518                                else
 519                                        udelay(mtt);
 520                        }
 521                }
 522        }
 523        
 524        /* Ask USB to send the packet - Irq disabled -> GFP_ATOMIC */
 525        if ((res = usb_submit_urb(urb, GFP_ATOMIC))) {
 526                IRDA_WARNING("%s(), failed Tx URB\n", __func__);
 527                netdev->stats.tx_errors++;
 528                /* Let USB recover : We will catch that in the watchdog */
 529                /*netif_start_queue(netdev);*/
 530        } else {
 531                /* Increment packet stats */
 532                netdev->stats.tx_packets++;
 533                netdev->stats.tx_bytes += skb->len;
 534                
 535                netdev->trans_start = jiffies;
 536        }
 537        spin_unlock_irqrestore(&self->lock, flags);
 538        
 539        return NETDEV_TX_OK;
 540
 541drop:
 542        /* Drop silently the skb and exit */
 543        dev_kfree_skb(skb);
 544        spin_unlock_irqrestore(&self->lock, flags);
 545        return NETDEV_TX_OK;
 546}
 547
 548/*------------------------------------------------------------------*/
 549/*
 550 * Note : this function will be called only for tx_urb...
 551 */
 552static void write_bulk_callback(struct urb *urb)
 553{
 554        unsigned long flags;
 555        struct sk_buff *skb = urb->context;
 556        struct irda_usb_cb *self = ((struct irda_skb_cb *) skb->cb)->context;
 557        
 558        IRDA_DEBUG(2, "%s()\n", __func__);
 559
 560        /* We should always have a context */
 561        IRDA_ASSERT(self != NULL, return;);
 562        /* We should always be called for the speed URB */
 563        IRDA_ASSERT(urb == self->tx_urb, return;);
 564
 565        /* Free up the skb */
 566        dev_kfree_skb_any(skb);
 567        urb->context = NULL;
 568
 569        /* Check for timeout and other USB nasties */
 570        if (urb->status != 0) {
 571                /* I get a lot of -ECONNABORTED = -103 here - Jean II */
 572                IRDA_DEBUG(0, "%s(), URB complete status %d, transfer_flags 0x%04X\n", __func__, urb->status, urb->transfer_flags);
 573
 574                /* Don't do anything here, that might confuse the USB layer,
 575                 * and we could go in recursion and blow the kernel stack...
 576                 * Instead, we will wait for irda_usb_net_timeout(), the
 577                 * network layer watchdog, to fix the situation.
 578                 * Jean II */
 579                /* A reset of the dongle might be welcomed here - Jean II */
 580                return;
 581        }
 582
 583        /* urb is now available */
 584        //urb->status = 0; -> tested above
 585
 586        /* Make sure we read self->present properly */
 587        spin_lock_irqsave(&self->lock, flags);
 588
 589        /* If the network is closed, stop everything */
 590        if ((!self->netopen) || (!self->present)) {
 591                IRDA_DEBUG(0, "%s(), Network is gone...\n", __func__);
 592                spin_unlock_irqrestore(&self->lock, flags);
 593                return;
 594        }
 595
 596        /* If changes to speed or xbofs is pending... */
 597        if ((self->new_speed != -1) || (self->new_xbofs != -1)) {
 598                if ((self->new_speed != self->speed) ||
 599                    (self->new_xbofs != self->xbofs)) {
 600                        /* We haven't changed speed yet (because of
 601                         * IUC_SPEED_BUG), so do it now - Jean II */
 602                        IRDA_DEBUG(1, "%s(), Changing speed now...\n", __func__);
 603                        irda_usb_change_speed_xbofs(self);
 604                } else {
 605                        /* New speed and xbof is now committed in hardware */
 606                        self->new_speed = -1;
 607                        self->new_xbofs = -1;
 608                        /* Done, waiting for next packet */
 609                        netif_wake_queue(self->netdev);
 610                }
 611        } else {
 612                /* Otherwise, allow the stack to send more packets */
 613                netif_wake_queue(self->netdev);
 614        }
 615        spin_unlock_irqrestore(&self->lock, flags);
 616}
 617
 618/*------------------------------------------------------------------*/
 619/*
 620 * Watchdog timer from the network layer.
 621 * After a predetermined timeout, if we don't give confirmation that
 622 * the packet has been sent (i.e. no call to netif_wake_queue()),
 623 * the network layer will call this function.
 624 * Note that URB that we submit have also a timeout. When the URB timeout
 625 * expire, the normal URB callback is called (write_bulk_callback()).
 626 */
 627static void irda_usb_net_timeout(struct net_device *netdev)
 628{
 629        unsigned long flags;
 630        struct irda_usb_cb *self = netdev_priv(netdev);
 631        struct urb *urb;
 632        int     done = 0;       /* If we have made any progress */
 633
 634        IRDA_DEBUG(0, "%s(), Network layer thinks we timed out!\n", __func__);
 635        IRDA_ASSERT(self != NULL, return;);
 636
 637        /* Protect us from USB callbacks, net Tx and else. */
 638        spin_lock_irqsave(&self->lock, flags);
 639
 640        /* self->present *MUST* be read under spinlock */
 641        if (!self->present) {
 642                IRDA_WARNING("%s(), device not present!\n", __func__);
 643                netif_stop_queue(netdev);
 644                spin_unlock_irqrestore(&self->lock, flags);
 645                return;
 646        }
 647
 648        /* Check speed URB */
 649        urb = self->speed_urb;
 650        if (urb->status != 0) {
 651                IRDA_DEBUG(0, "%s: Speed change timed out, urb->status=%d, urb->transfer_flags=0x%04X\n", netdev->name, urb->status, urb->transfer_flags);
 652
 653                switch (urb->status) {
 654                case -EINPROGRESS:
 655                        usb_unlink_urb(urb);
 656                        /* Note : above will  *NOT* call netif_wake_queue()
 657                         * in completion handler, we will come back here.
 658                         * Jean II */
 659                        done = 1;
 660                        break;
 661                case -ECONNRESET:
 662                case -ENOENT:                   /* urb unlinked by us */
 663                default:                        /* ??? - Play safe */
 664                        urb->status = 0;
 665                        netif_wake_queue(self->netdev);
 666                        done = 1;
 667                        break;
 668                }
 669        }
 670
 671        /* Check Tx URB */
 672        urb = self->tx_urb;
 673        if (urb->status != 0) {
 674                struct sk_buff *skb = urb->context;
 675
 676                IRDA_DEBUG(0, "%s: Tx timed out, urb->status=%d, urb->transfer_flags=0x%04X\n", netdev->name, urb->status, urb->transfer_flags);
 677
 678                /* Increase error count */
 679                netdev->stats.tx_errors++;
 680
 681#ifdef IU_BUG_KICK_TIMEOUT
 682                /* Can't be a bad idea to reset the speed ;-) - Jean II */
 683                if(self->new_speed == -1)
 684                        self->new_speed = self->speed;
 685                if(self->new_xbofs == -1)
 686                        self->new_xbofs = self->xbofs;
 687                irda_usb_change_speed_xbofs(self);
 688#endif /* IU_BUG_KICK_TIMEOUT */
 689
 690                switch (urb->status) {
 691                case -EINPROGRESS:
 692                        usb_unlink_urb(urb);
 693                        /* Note : above will  *NOT* call netif_wake_queue()
 694                         * in completion handler, because urb->status will
 695                         * be -ENOENT. We will fix that at the next watchdog,
 696                         * leaving more time to USB to recover...
 697                         * Jean II */
 698                        done = 1;
 699                        break;
 700                case -ECONNRESET:
 701                case -ENOENT:                   /* urb unlinked by us */
 702                default:                        /* ??? - Play safe */
 703                        if(skb != NULL) {
 704                                dev_kfree_skb_any(skb);
 705                                urb->context = NULL;
 706                        }
 707                        urb->status = 0;
 708                        netif_wake_queue(self->netdev);
 709                        done = 1;
 710                        break;
 711                }
 712        }
 713        spin_unlock_irqrestore(&self->lock, flags);
 714
 715        /* Maybe we need a reset */
 716        /* Note : Some drivers seem to use a usb_set_interface() when they
 717         * need to reset the hardware. Hum...
 718         */
 719
 720        /* if(done == 0) */
 721}
 722
 723/************************* RECEIVE ROUTINES *************************/
 724/*
 725 * Receive packets from the USB layer stack and pass them to the IrDA stack.
 726 * Try to work around USB failures...
 727 */
 728
 729/*
 730 * Note :
 731 * Some of you may have noticed that most dongle have an interrupt in pipe
 732 * that we don't use. Here is the little secret...
 733 * When we hang a Rx URB on the bulk in pipe, it generates some USB traffic
 734 * in every USB frame. This is unnecessary overhead.
 735 * The interrupt in pipe will generate an event every time a packet is
 736 * received. Reading an interrupt pipe adds minimal overhead, but has some
 737 * latency (~1ms).
 738 * If we are connected (speed != 9600), we want to minimise latency, so
 739 * we just always hang the Rx URB and ignore the interrupt.
 740 * If we are not connected (speed == 9600), there is usually no Rx traffic,
 741 * and we want to minimise the USB overhead. In this case we should wait
 742 * on the interrupt pipe and hang the Rx URB only when an interrupt is
 743 * received.
 744 * Jean II
 745 *
 746 * Note : don't read the above as what we are currently doing, but as
 747 * something we could do with KC dongle. Also don't forget that the
 748 * interrupt pipe is not part of the original standard, so this would
 749 * need to be optional...
 750 * Jean II
 751 */
 752
 753/*------------------------------------------------------------------*/
 754/*
 755 * Submit a Rx URB to the USB layer to handle reception of a frame
 756 * Mostly called by the completion callback of the previous URB.
 757 *
 758 * Jean II
 759 */
 760static void irda_usb_submit(struct irda_usb_cb *self, struct sk_buff *skb, struct urb *urb)
 761{
 762        struct irda_skb_cb *cb;
 763        int ret;
 764
 765        IRDA_DEBUG(2, "%s()\n", __func__);
 766
 767        /* This should never happen */
 768        IRDA_ASSERT(skb != NULL, return;);
 769        IRDA_ASSERT(urb != NULL, return;);
 770
 771        /* Save ourselves in the skb */
 772        cb = (struct irda_skb_cb *) skb->cb;
 773        cb->context = self;
 774
 775        /* Reinitialize URB */
 776        usb_fill_bulk_urb(urb, self->usbdev, 
 777                      usb_rcvbulkpipe(self->usbdev, self->bulk_in_ep), 
 778                      skb->data, IRDA_SKB_MAX_MTU,
 779                      irda_usb_receive, skb);
 780        urb->status = 0;
 781
 782        /* Can be called from irda_usb_receive (irq handler) -> GFP_ATOMIC */
 783        ret = usb_submit_urb(urb, GFP_ATOMIC);
 784        if (ret) {
 785                /* If this ever happen, we are in deep s***.
 786                 * Basically, the Rx path will stop... */
 787                IRDA_WARNING("%s(), Failed to submit Rx URB %d\n",
 788                             __func__, ret);
 789        }
 790}
 791
 792/*------------------------------------------------------------------*/
 793/*
 794 * Function irda_usb_receive(urb)
 795 *
 796 *     Called by the USB subsystem when a frame has been received
 797 *
 798 */
 799static void irda_usb_receive(struct urb *urb)
 800{
 801        struct sk_buff *skb = (struct sk_buff *) urb->context;
 802        struct irda_usb_cb *self; 
 803        struct irda_skb_cb *cb;
 804        struct sk_buff *newskb;
 805        struct sk_buff *dataskb;
 806        struct urb *next_urb;
 807        unsigned int len, docopy;
 808
 809        IRDA_DEBUG(2, "%s(), len=%d\n", __func__, urb->actual_length);
 810        
 811        /* Find ourselves */
 812        cb = (struct irda_skb_cb *) skb->cb;
 813        IRDA_ASSERT(cb != NULL, return;);
 814        self = (struct irda_usb_cb *) cb->context;
 815        IRDA_ASSERT(self != NULL, return;);
 816
 817        /* If the network is closed or the device gone, stop everything */
 818        if ((!self->netopen) || (!self->present)) {
 819                IRDA_DEBUG(0, "%s(), Network is gone!\n", __func__);
 820                /* Don't re-submit the URB : will stall the Rx path */
 821                return;
 822        }
 823        
 824        /* Check the status */
 825        if (urb->status != 0) {
 826                switch (urb->status) {
 827                case -EILSEQ:
 828                        self->netdev->stats.rx_crc_errors++;
 829                        /* Also precursor to a hot-unplug on UHCI. */
 830                        /* Fallthrough... */
 831                case -ECONNRESET:
 832                        /* Random error, if I remember correctly */
 833                        /* uhci_cleanup_unlink() is going to kill the Rx
 834                         * URB just after we return. No problem, at this
 835                         * point the URB will be idle ;-) - Jean II */
 836                case -ESHUTDOWN:
 837                        /* That's usually a hot-unplug. Submit will fail... */
 838                case -ETIME:
 839                        /* Usually precursor to a hot-unplug on OHCI. */
 840                default:
 841                        self->netdev->stats.rx_errors++;
 842                        IRDA_DEBUG(0, "%s(), RX status %d, transfer_flags 0x%04X\n", __func__, urb->status, urb->transfer_flags);
 843                        break;
 844                }
 845                /* If we received an error, we don't want to resubmit the
 846                 * Rx URB straight away but to give the USB layer a little
 847                 * bit of breathing room.
 848                 * We are in the USB thread context, therefore there is a
 849                 * danger of recursion (new URB we submit fails, we come
 850                 * back here).
 851                 * With recent USB stack (2.6.15+), I'm seeing that on
 852                 * hot unplug of the dongle...
 853                 * Lowest effective timer is 10ms...
 854                 * Jean II */
 855                self->rx_defer_timer.function = irda_usb_rx_defer_expired;
 856                self->rx_defer_timer.data = (unsigned long) urb;
 857                mod_timer(&self->rx_defer_timer, jiffies + (10 * HZ / 1000));
 858                return;
 859        }
 860        
 861        /* Check for empty frames */
 862        if (urb->actual_length <= self->header_length) {
 863                IRDA_WARNING("%s(), empty frame!\n", __func__);
 864                goto done;
 865        }
 866
 867        /*  
 868         * Remember the time we received this frame, so we can
 869         * reduce the min turn time a bit since we will know
 870         * how much time we have used for protocol processing
 871         */
 872        do_gettimeofday(&self->stamp);
 873
 874        /* Check if we need to copy the data to a new skb or not.
 875         * For most frames, we use ZeroCopy and pass the already
 876         * allocated skb up the stack.
 877         * If the frame is small, it is more efficient to copy it
 878         * to save memory (copy will be fast anyway - that's
 879         * called Rx-copy-break). Jean II */
 880        docopy = (urb->actual_length < IRDA_RX_COPY_THRESHOLD);
 881
 882        /* Allocate a new skb */
 883        if (self->capability & IUC_STIR421X)
 884                newskb = dev_alloc_skb(docopy ? urb->actual_length :
 885                                       IRDA_SKB_MAX_MTU +
 886                                       USB_IRDA_STIR421X_HEADER);
 887        else
 888                newskb = dev_alloc_skb(docopy ? urb->actual_length :
 889                                       IRDA_SKB_MAX_MTU);
 890
 891        if (!newskb)  {
 892                self->netdev->stats.rx_dropped++;
 893                /* We could deliver the current skb, but this would stall
 894                 * the Rx path. Better drop the packet... Jean II */
 895                goto done;  
 896        }
 897
 898        /* Make sure IP header get aligned (IrDA header is 5 bytes) */
 899        /* But IrDA-USB header is 1 byte. Jean II */
 900        //skb_reserve(newskb, USB_IRDA_HEADER - 1);
 901
 902        if(docopy) {
 903                /* Copy packet, so we can recycle the original */
 904                skb_copy_from_linear_data(skb, newskb->data, urb->actual_length);
 905                /* Deliver this new skb */
 906                dataskb = newskb;
 907                /* And hook the old skb to the URB
 908                 * Note : we don't need to "clean up" the old skb,
 909                 * as we never touched it. Jean II */
 910        } else {
 911                /* We are using ZeroCopy. Deliver old skb */
 912                dataskb = skb;
 913                /* And hook the new skb to the URB */
 914                skb = newskb;
 915        }
 916
 917        /* Set proper length on skb & remove USB-IrDA header */
 918        skb_put(dataskb, urb->actual_length);
 919        skb_pull(dataskb, self->header_length);
 920
 921        /* Ask the networking layer to queue the packet for the IrDA stack */
 922        dataskb->dev = self->netdev;
 923        skb_reset_mac_header(dataskb);
 924        dataskb->protocol = htons(ETH_P_IRDA);
 925        len = dataskb->len;
 926        netif_rx(dataskb);
 927
 928        /* Keep stats up to date */
 929        self->netdev->stats.rx_bytes += len;
 930        self->netdev->stats.rx_packets++;
 931
 932done:
 933        /* Note : at this point, the URB we've just received (urb)
 934         * is still referenced by the USB layer. For example, if we
 935         * have received a -ECONNRESET, uhci_cleanup_unlink() will
 936         * continue to process it (in fact, cleaning it up).
 937         * If we were to submit this URB, disaster would ensue.
 938         * Therefore, we submit our idle URB, and put this URB in our
 939         * idle slot....
 940         * Jean II */
 941        /* Note : with this scheme, we could submit the idle URB before
 942         * processing the Rx URB. I don't think it would buy us anything as
 943         * we are running in the USB thread context. Jean II */
 944        next_urb = self->idle_rx_urb;
 945
 946        /* Recycle Rx URB : Now, the idle URB is the present one */
 947        urb->context = NULL;
 948        self->idle_rx_urb = urb;
 949
 950        /* Submit the idle URB to replace the URB we've just received.
 951         * Do it last to avoid race conditions... Jean II */
 952        irda_usb_submit(self, skb, next_urb);
 953}
 954
 955/*------------------------------------------------------------------*/
 956/*
 957 * In case of errors, we want the USB layer to have time to recover.
 958 * Now, it is time to resubmit ouur Rx URB...
 959 */
 960static void irda_usb_rx_defer_expired(unsigned long data)
 961{
 962        struct urb *urb = (struct urb *) data;
 963        struct sk_buff *skb = (struct sk_buff *) urb->context;
 964        struct irda_usb_cb *self; 
 965        struct irda_skb_cb *cb;
 966        struct urb *next_urb;
 967
 968        IRDA_DEBUG(2, "%s()\n", __func__);
 969
 970        /* Find ourselves */
 971        cb = (struct irda_skb_cb *) skb->cb;
 972        IRDA_ASSERT(cb != NULL, return;);
 973        self = (struct irda_usb_cb *) cb->context;
 974        IRDA_ASSERT(self != NULL, return;);
 975
 976        /* Same stuff as when Rx is done, see above... */
 977        next_urb = self->idle_rx_urb;
 978        urb->context = NULL;
 979        self->idle_rx_urb = urb;
 980        irda_usb_submit(self, skb, next_urb);
 981}
 982
 983/*------------------------------------------------------------------*/
 984/*
 985 * Callbak from IrDA layer. IrDA wants to know if we have
 986 * started receiving anything.
 987 */
 988static int irda_usb_is_receiving(struct irda_usb_cb *self)
 989{
 990        /* Note : because of the way UHCI works, it's almost impossible
 991         * to get this info. The Controller DMA directly to memory and
 992         * signal only when the whole frame is finished. To know if the
 993         * first TD of the URB has been filled or not seems hard work...
 994         *
 995         * The other solution would be to use the "receiving" command
 996         * on the default decriptor with a usb_control_msg(), but that
 997         * would add USB traffic and would return result only in the
 998         * next USB frame (~1ms).
 999         *
1000         * I've been told that current dongles send status info on their
1001         * interrupt endpoint, and that's what the Windows driver uses
1002         * to know this info. Unfortunately, this is not yet in the spec...
1003         *
1004         * Jean II
1005         */
1006
1007        return 0; /* For now */
1008}
1009
1010#define STIR421X_PATCH_PRODUCT_VER     "Product Version: "
1011#define STIR421X_PATCH_STMP_TAG        "STMP"
1012#define STIR421X_PATCH_CODE_OFFSET     512 /* patch image starts before here */
1013/* marks end of patch file header (PC DOS text file EOF character) */
1014#define STIR421X_PATCH_END_OF_HDR_TAG  0x1A
1015#define STIR421X_PATCH_BLOCK_SIZE      1023
1016
1017/*
1018 * Function stir421x_fwupload (struct irda_usb_cb *self,
1019 *                             unsigned char *patch,
1020 *                             const unsigned int patch_len)
1021 *
1022 *   Upload firmware code to SigmaTel 421X IRDA-USB dongle
1023 */
1024static int stir421x_fw_upload(struct irda_usb_cb *self,
1025                             const unsigned char *patch,
1026                             const unsigned int patch_len)
1027{
1028        int ret = -ENOMEM;
1029        int actual_len = 0;
1030        unsigned int i;
1031        unsigned int block_size = 0;
1032        unsigned char *patch_block;
1033
1034        patch_block = kzalloc(STIR421X_PATCH_BLOCK_SIZE, GFP_KERNEL);
1035        if (patch_block == NULL)
1036                return -ENOMEM;
1037
1038        /* break up patch into 1023-byte sections */
1039        for (i = 0; i < patch_len; i += block_size) {
1040                block_size = patch_len - i;
1041
1042                if (block_size > STIR421X_PATCH_BLOCK_SIZE)
1043                        block_size = STIR421X_PATCH_BLOCK_SIZE;
1044
1045                /* upload the patch section */
1046                memcpy(patch_block, patch + i, block_size);
1047
1048                ret = usb_bulk_msg(self->usbdev,
1049                                   usb_sndbulkpipe(self->usbdev,
1050                                                   self->bulk_out_ep),
1051                                   patch_block, block_size,
1052                                   &actual_len, msecs_to_jiffies(500));
1053                IRDA_DEBUG(3,"%s(): Bulk send %u bytes, ret=%d\n",
1054                           __func__, actual_len, ret);
1055
1056                if (ret < 0)
1057                        break;
1058
1059                mdelay(10);
1060        }
1061
1062        kfree(patch_block);
1063
1064        return ret;
1065 }
1066
1067/*
1068 * Function stir421x_patch_device(struct irda_usb_cb *self)
1069 *
1070 * Get a firmware code from userspase using hotplug request_firmware() call
1071  */
1072static int stir421x_patch_device(struct irda_usb_cb *self)
1073{
1074        unsigned int i;
1075        int ret;
1076        char stir421x_fw_name[12];
1077        const struct firmware *fw;
1078        const unsigned char *fw_version_ptr; /* pointer to version string */
1079        unsigned long fw_version = 0;
1080
1081        /*
1082         * Known firmware patch file names for STIR421x dongles
1083         * are "42101001.sb" or "42101002.sb"
1084         */
1085        sprintf(stir421x_fw_name, "4210%4X.sb",
1086                self->usbdev->descriptor.bcdDevice);
1087        ret = request_firmware(&fw, stir421x_fw_name, &self->usbdev->dev);
1088        if (ret < 0)
1089                return ret;
1090
1091        /* We get a patch from userspace */
1092        IRDA_MESSAGE("%s(): Received firmware %s (%zu bytes)\n",
1093                     __func__, stir421x_fw_name, fw->size);
1094
1095        ret = -EINVAL;
1096
1097        /* Get the bcd product version */
1098        if (!memcmp(fw->data, STIR421X_PATCH_PRODUCT_VER,
1099                    sizeof(STIR421X_PATCH_PRODUCT_VER) - 1)) {
1100                fw_version_ptr = fw->data +
1101                        sizeof(STIR421X_PATCH_PRODUCT_VER) - 1;
1102
1103                /* Let's check if the product version is dotted */
1104                if (fw_version_ptr[3] == '.' &&
1105                    fw_version_ptr[7] == '.') {
1106                        unsigned long major, minor, build;
1107                        major = simple_strtoul(fw_version_ptr, NULL, 10);
1108                        minor = simple_strtoul(fw_version_ptr + 4, NULL, 10);
1109                        build = simple_strtoul(fw_version_ptr + 8, NULL, 10);
1110
1111                        fw_version = (major << 12)
1112                                + (minor << 8)
1113                                + ((build / 10) << 4)
1114                                + (build % 10);
1115
1116                        IRDA_DEBUG(3, "%s(): Firmware Product version %ld\n",
1117                                   __func__, fw_version);
1118                }
1119        }
1120
1121        if (self->usbdev->descriptor.bcdDevice == cpu_to_le16(fw_version)) {
1122                /*
1123                 * If we're here, we've found a correct patch
1124                 * The actual image starts after the "STMP" keyword
1125                 * so forward to the firmware header tag
1126                 */
1127                for (i = 0; i < fw->size && fw->data[i] !=
1128                             STIR421X_PATCH_END_OF_HDR_TAG; i++) ;
1129                /* here we check for the out of buffer case */
1130                if (i < STIR421X_PATCH_CODE_OFFSET && i < fw->size &&
1131                                STIR421X_PATCH_END_OF_HDR_TAG == fw->data[i]) {
1132                        if (!memcmp(fw->data + i + 1, STIR421X_PATCH_STMP_TAG,
1133                                    sizeof(STIR421X_PATCH_STMP_TAG) - 1)) {
1134
1135                                /* We can upload the patch to the target */
1136                                i += sizeof(STIR421X_PATCH_STMP_TAG);
1137                                ret = stir421x_fw_upload(self, &fw->data[i],
1138                                                         fw->size - i);
1139                        }
1140                }
1141        }
1142
1143        release_firmware(fw);
1144
1145        return ret;
1146}
1147
1148
1149/********************** IRDA DEVICE CALLBACKS **********************/
1150/*
1151 * Main calls from the IrDA/Network subsystem.
1152 * Mostly registering a new irda-usb device and removing it....
1153 * We only deal with the IrDA side of the business, the USB side will
1154 * be dealt with below...
1155 */
1156
1157
1158/*------------------------------------------------------------------*/
1159/*
1160 * Function irda_usb_net_open (dev)
1161 *
1162 *    Network device is taken up. Usually this is done by "ifconfig irda0 up" 
1163 *   
1164 * Note : don't mess with self->netopen - Jean II
1165 */
1166static int irda_usb_net_open(struct net_device *netdev)
1167{
1168        struct irda_usb_cb *self;
1169        unsigned long flags;
1170        char    hwname[16];
1171        int i;
1172        
1173        IRDA_DEBUG(1, "%s()\n", __func__);
1174
1175        IRDA_ASSERT(netdev != NULL, return -1;);
1176        self = netdev_priv(netdev);
1177        IRDA_ASSERT(self != NULL, return -1;);
1178
1179        spin_lock_irqsave(&self->lock, flags);
1180        /* Can only open the device if it's there */
1181        if(!self->present) {
1182                spin_unlock_irqrestore(&self->lock, flags);
1183                IRDA_WARNING("%s(), device not present!\n", __func__);
1184                return -1;
1185        }
1186
1187        if(self->needspatch) {
1188                spin_unlock_irqrestore(&self->lock, flags);
1189                IRDA_WARNING("%s(), device needs patch\n", __func__) ;
1190                return -EIO ;
1191        }
1192
1193        /* Initialise default speed and xbofs value
1194         * (IrLAP will change that soon) */
1195        self->speed = -1;
1196        self->xbofs = -1;
1197        self->new_speed = -1;
1198        self->new_xbofs = -1;
1199
1200        /* To do *before* submitting Rx urbs and starting net Tx queue
1201         * Jean II */
1202        self->netopen = 1;
1203        spin_unlock_irqrestore(&self->lock, flags);
1204
1205        /* 
1206         * Now that everything should be initialized properly,
1207         * Open new IrLAP layer instance to take care of us...
1208         * Note : will send immediately a speed change...
1209         */
1210        sprintf(hwname, "usb#%d", self->usbdev->devnum);
1211        self->irlap = irlap_open(netdev, &self->qos, hwname);
1212        IRDA_ASSERT(self->irlap != NULL, return -1;);
1213
1214        /* Allow IrLAP to send data to us */
1215        netif_start_queue(netdev);
1216
1217        /* We submit all the Rx URB except for one that we keep idle.
1218         * Need to be initialised before submitting other USBs, because
1219         * in some cases as soon as we submit the URBs the USB layer
1220         * will trigger a dummy receive - Jean II */
1221        self->idle_rx_urb = self->rx_urb[IU_MAX_ACTIVE_RX_URBS];
1222        self->idle_rx_urb->context = NULL;
1223
1224        /* Now that we can pass data to IrLAP, allow the USB layer
1225         * to send us some data... */
1226        for (i = 0; i < IU_MAX_ACTIVE_RX_URBS; i++) {
1227                struct sk_buff *skb = dev_alloc_skb(IRDA_SKB_MAX_MTU);
1228                if (!skb) {
1229                        /* If this ever happen, we are in deep s***.
1230                         * Basically, we can't start the Rx path... */
1231                        IRDA_WARNING("%s(), Failed to allocate Rx skb\n",
1232                                     __func__);
1233                        return -1;
1234                }
1235                //skb_reserve(newskb, USB_IRDA_HEADER - 1);
1236                irda_usb_submit(self, skb, self->rx_urb[i]);
1237        }
1238
1239        /* Ready to play !!! */
1240        return 0;
1241}
1242
1243/*------------------------------------------------------------------*/
1244/*
1245 * Function irda_usb_net_close (self)
1246 *
1247 *    Network device is taken down. Usually this is done by 
1248 *    "ifconfig irda0 down" 
1249 */
1250static int irda_usb_net_close(struct net_device *netdev)
1251{
1252        struct irda_usb_cb *self;
1253        int     i;
1254
1255        IRDA_DEBUG(1, "%s()\n", __func__);
1256
1257        IRDA_ASSERT(netdev != NULL, return -1;);
1258        self = netdev_priv(netdev);
1259        IRDA_ASSERT(self != NULL, return -1;);
1260
1261        /* Clear this flag *before* unlinking the urbs and *before*
1262         * stopping the network Tx queue - Jean II */
1263        self->netopen = 0;
1264
1265        /* Stop network Tx queue */
1266        netif_stop_queue(netdev);
1267
1268        /* Kill defered Rx URB */
1269        del_timer(&self->rx_defer_timer);
1270
1271        /* Deallocate all the Rx path buffers (URBs and skb) */
1272        for (i = 0; i < self->max_rx_urb; i++) {
1273                struct urb *urb = self->rx_urb[i];
1274                struct sk_buff *skb = (struct sk_buff *) urb->context;
1275                /* Cancel the receive command */
1276                usb_kill_urb(urb);
1277                /* The skb is ours, free it */
1278                if(skb) {
1279                        dev_kfree_skb(skb);
1280                        urb->context = NULL;
1281                }
1282        }
1283        /* Cancel Tx and speed URB - need to be synchronous to avoid races */
1284        usb_kill_urb(self->tx_urb);
1285        usb_kill_urb(self->speed_urb);
1286
1287        /* Stop and remove instance of IrLAP */
1288        if (self->irlap)
1289                irlap_close(self->irlap);
1290        self->irlap = NULL;
1291
1292        return 0;
1293}
1294
1295/*------------------------------------------------------------------*/
1296/*
1297 * IOCTLs : Extra out-of-band network commands...
1298 */
1299static int irda_usb_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1300{
1301        unsigned long flags;
1302        struct if_irda_req *irq = (struct if_irda_req *) rq;
1303        struct irda_usb_cb *self;
1304        int ret = 0;
1305
1306        IRDA_ASSERT(dev != NULL, return -1;);
1307        self = netdev_priv(dev);
1308        IRDA_ASSERT(self != NULL, return -1;);
1309
1310        IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __func__, dev->name, cmd);
1311
1312        switch (cmd) {
1313        case SIOCSBANDWIDTH: /* Set bandwidth */
1314                if (!capable(CAP_NET_ADMIN))
1315                        return -EPERM;
1316                /* Protect us from USB callbacks, net watchdog and else. */
1317                spin_lock_irqsave(&self->lock, flags);
1318                /* Check if the device is still there */
1319                if(self->present) {
1320                        /* Set the desired speed */
1321                        self->new_speed = irq->ifr_baudrate;
1322                        irda_usb_change_speed_xbofs(self);
1323                }
1324                spin_unlock_irqrestore(&self->lock, flags);
1325                break;
1326        case SIOCSMEDIABUSY: /* Set media busy */
1327                if (!capable(CAP_NET_ADMIN))
1328                        return -EPERM;
1329                /* Check if the IrDA stack is still there */
1330                if(self->netopen)
1331                        irda_device_set_media_busy(self->netdev, TRUE);
1332                break;
1333        case SIOCGRECEIVING: /* Check if we are receiving right now */
1334                irq->ifr_receiving = irda_usb_is_receiving(self);
1335                break;
1336        default:
1337                ret = -EOPNOTSUPP;
1338        }
1339        
1340        return ret;
1341}
1342
1343/*------------------------------------------------------------------*/
1344
1345/********************* IRDA CONFIG SUBROUTINES *********************/
1346/*
1347 * Various subroutines dealing with IrDA and network stuff we use to
1348 * configure and initialise each irda-usb instance.
1349 * These functions are used below in the main calls of the driver...
1350 */
1351
1352/*------------------------------------------------------------------*/
1353/*
1354 * Set proper values in the IrDA QOS structure
1355 */
1356static inline void irda_usb_init_qos(struct irda_usb_cb *self)
1357{
1358        struct irda_class_desc *desc;
1359
1360        IRDA_DEBUG(3, "%s()\n", __func__);
1361        
1362        desc = self->irda_desc;
1363        
1364        /* Initialize QoS for this device */
1365        irda_init_max_qos_capabilies(&self->qos);
1366
1367        /* See spec section 7.2 for meaning.
1368         * Values are little endian (as most USB stuff), the IrDA stack
1369         * use it in native order (see parameters.c). - Jean II */
1370        self->qos.baud_rate.bits       = le16_to_cpu(desc->wBaudRate);
1371        self->qos.min_turn_time.bits   = desc->bmMinTurnaroundTime;
1372        self->qos.additional_bofs.bits = desc->bmAdditionalBOFs;
1373        self->qos.window_size.bits     = desc->bmWindowSize;
1374        self->qos.data_size.bits       = desc->bmDataSize;
1375
1376        IRDA_DEBUG(0, "%s(), dongle says speed=0x%X, size=0x%X, window=0x%X, bofs=0x%X, turn=0x%X\n", 
1377                __func__, self->qos.baud_rate.bits, self->qos.data_size.bits, self->qos.window_size.bits, self->qos.additional_bofs.bits, self->qos.min_turn_time.bits);
1378
1379        /* Don't always trust what the dongle tell us */
1380        if(self->capability & IUC_SIR_ONLY)
1381                self->qos.baud_rate.bits        &= 0x00ff;
1382        if(self->capability & IUC_SMALL_PKT)
1383                self->qos.data_size.bits         = 0x07;
1384        if(self->capability & IUC_NO_WINDOW)
1385                self->qos.window_size.bits       = 0x01;
1386        if(self->capability & IUC_MAX_WINDOW)
1387                self->qos.window_size.bits       = 0x7f;
1388        if(self->capability & IUC_MAX_XBOFS)
1389                self->qos.additional_bofs.bits   = 0x01;
1390
1391#if 1
1392        /* Module parameter can override the rx window size */
1393        if (qos_mtt_bits)
1394                self->qos.min_turn_time.bits = qos_mtt_bits;
1395#endif      
1396        /* 
1397         * Note : most of those values apply only for the receive path,
1398         * the transmit path will be set differently - Jean II 
1399         */
1400        irda_qos_bits_to_value(&self->qos);
1401}
1402
1403/*------------------------------------------------------------------*/
1404static const struct net_device_ops irda_usb_netdev_ops = {
1405        .ndo_open       = irda_usb_net_open,
1406        .ndo_stop       = irda_usb_net_close,
1407        .ndo_do_ioctl   = irda_usb_net_ioctl,
1408        .ndo_start_xmit = irda_usb_hard_xmit,
1409        .ndo_tx_timeout = irda_usb_net_timeout,
1410};
1411
1412/*
1413 * Initialise the network side of the irda-usb instance
1414 * Called when a new USB instance is registered in irda_usb_probe()
1415 */
1416static inline int irda_usb_open(struct irda_usb_cb *self)
1417{
1418        struct net_device *netdev = self->netdev;
1419
1420        IRDA_DEBUG(1, "%s()\n", __func__);
1421
1422        netdev->netdev_ops = &irda_usb_netdev_ops;
1423
1424        irda_usb_init_qos(self);
1425
1426        return register_netdev(netdev);
1427}
1428
1429/*------------------------------------------------------------------*/
1430/*
1431 * Cleanup the network side of the irda-usb instance
1432 * Called when a USB instance is removed in irda_usb_disconnect()
1433 */
1434static inline void irda_usb_close(struct irda_usb_cb *self)
1435{
1436        IRDA_DEBUG(1, "%s()\n", __func__);
1437
1438        /* Remove netdevice */
1439        unregister_netdev(self->netdev);
1440
1441        /* Remove the speed buffer */
1442        kfree(self->speed_buff);
1443        self->speed_buff = NULL;
1444
1445        kfree(self->tx_buff);
1446        self->tx_buff = NULL;
1447}
1448
1449/********************** USB CONFIG SUBROUTINES **********************/
1450/*
1451 * Various subroutines dealing with USB stuff we use to configure and
1452 * initialise each irda-usb instance.
1453 * These functions are used below in the main calls of the driver...
1454 */
1455
1456/*------------------------------------------------------------------*/
1457/*
1458 * Function irda_usb_parse_endpoints(dev, ifnum)
1459 *
1460 *    Parse the various endpoints and find the one we need.
1461 *
1462 * The endpoint are the pipes used to communicate with the USB device.
1463 * The spec defines 2 endpoints of type bulk transfer, one in, and one out.
1464 * These are used to pass frames back and forth with the dongle.
1465 * Most dongle have also an interrupt endpoint, that will be probably
1466 * documented in the next spec...
1467 */
1468static inline int irda_usb_parse_endpoints(struct irda_usb_cb *self, struct usb_host_endpoint *endpoint, int ennum)
1469{
1470        int i;          /* Endpoint index in table */
1471                
1472        /* Init : no endpoints */
1473        self->bulk_in_ep = 0;
1474        self->bulk_out_ep = 0;
1475        self->bulk_int_ep = 0;
1476
1477        /* Let's look at all those endpoints */
1478        for(i = 0; i < ennum; i++) {
1479                /* All those variables will get optimised by the compiler,
1480                 * so let's aim for clarity... - Jean II */
1481                __u8 ep;        /* Endpoint address */
1482                __u8 dir;       /* Endpoint direction */
1483                __u8 attr;      /* Endpoint attribute */
1484                __u16 psize;    /* Endpoint max packet size in bytes */
1485
1486                /* Get endpoint address, direction and attribute */
1487                ep = endpoint[i].desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1488                dir = endpoint[i].desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK;
1489                attr = endpoint[i].desc.bmAttributes;
1490                psize = le16_to_cpu(endpoint[i].desc.wMaxPacketSize);
1491
1492                /* Is it a bulk endpoint ??? */
1493                if(attr == USB_ENDPOINT_XFER_BULK) {
1494                        /* We need to find an IN and an OUT */
1495                        if(dir == USB_DIR_IN) {
1496                                /* This is our Rx endpoint */
1497                                self->bulk_in_ep = ep;
1498                        } else {
1499                                /* This is our Tx endpoint */
1500                                self->bulk_out_ep = ep;
1501                                self->bulk_out_mtu = psize;
1502                        }
1503                } else {
1504                        if((attr == USB_ENDPOINT_XFER_INT) &&
1505                           (dir == USB_DIR_IN)) {
1506                                /* This is our interrupt endpoint */
1507                                self->bulk_int_ep = ep;
1508                        } else {
1509                                IRDA_ERROR("%s(), Unrecognised endpoint %02X.\n", __func__, ep);
1510                        }
1511                }
1512        }
1513
1514        IRDA_DEBUG(0, "%s(), And our endpoints are : in=%02X, out=%02X (%d), int=%02X\n",
1515                __func__, self->bulk_in_ep, self->bulk_out_ep, self->bulk_out_mtu, self->bulk_int_ep);
1516
1517        return (self->bulk_in_ep != 0) && (self->bulk_out_ep != 0);
1518}
1519
1520#ifdef IU_DUMP_CLASS_DESC
1521/*------------------------------------------------------------------*/
1522/*
1523 * Function usb_irda_dump_class_desc(desc)
1524 *
1525 *    Prints out the contents of the IrDA class descriptor
1526 *
1527 */
1528static inline void irda_usb_dump_class_desc(struct irda_class_desc *desc)
1529{
1530        /* Values are little endian */
1531        printk("bLength=%x\n", desc->bLength);
1532        printk("bDescriptorType=%x\n", desc->bDescriptorType);
1533        printk("bcdSpecRevision=%x\n", le16_to_cpu(desc->bcdSpecRevision)); 
1534        printk("bmDataSize=%x\n", desc->bmDataSize);
1535        printk("bmWindowSize=%x\n", desc->bmWindowSize);
1536        printk("bmMinTurnaroundTime=%d\n", desc->bmMinTurnaroundTime);
1537        printk("wBaudRate=%x\n", le16_to_cpu(desc->wBaudRate));
1538        printk("bmAdditionalBOFs=%x\n", desc->bmAdditionalBOFs);
1539        printk("bIrdaRateSniff=%x\n", desc->bIrdaRateSniff);
1540        printk("bMaxUnicastList=%x\n", desc->bMaxUnicastList);
1541}
1542#endif /* IU_DUMP_CLASS_DESC */
1543
1544/*------------------------------------------------------------------*/
1545/*
1546 * Function irda_usb_find_class_desc(intf)
1547 *
1548 *    Returns instance of IrDA class descriptor, or NULL if not found
1549 *
1550 * The class descriptor is some extra info that IrDA USB devices will
1551 * offer to us, describing their IrDA characteristics. We will use that in
1552 * irda_usb_init_qos()
1553 */
1554static inline struct irda_class_desc *irda_usb_find_class_desc(struct usb_interface *intf)
1555{
1556        struct usb_device *dev = interface_to_usbdev (intf);
1557        struct irda_class_desc *desc;
1558        int ret;
1559
1560        desc = kzalloc(sizeof(*desc), GFP_KERNEL);
1561        if (!desc)
1562                return NULL;
1563
1564        /* USB-IrDA class spec 1.0:
1565         *      6.1.3: Standard "Get Descriptor" Device Request is not
1566         *             appropriate to retrieve class-specific descriptor
1567         *      6.2.5: Class Specific "Get Class Descriptor" Interface Request
1568         *             is mandatory and returns the USB-IrDA class descriptor
1569         */
1570
1571        ret = usb_control_msg(dev, usb_rcvctrlpipe(dev,0),
1572                IU_REQ_GET_CLASS_DESC,
1573                USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
1574                0, intf->altsetting->desc.bInterfaceNumber, desc,
1575                sizeof(*desc), 500);
1576        
1577        IRDA_DEBUG(1, "%s(), ret=%d\n", __func__, ret);
1578        if (ret < sizeof(*desc)) {
1579                IRDA_WARNING("usb-irda: class_descriptor read %s (%d)\n",
1580                             (ret<0) ? "failed" : "too short", ret);
1581        }
1582        else if (desc->bDescriptorType != USB_DT_IRDA) {
1583                IRDA_WARNING("usb-irda: bad class_descriptor type\n");
1584        }
1585        else {
1586#ifdef IU_DUMP_CLASS_DESC
1587                irda_usb_dump_class_desc(desc);
1588#endif  /* IU_DUMP_CLASS_DESC */
1589
1590                return desc;
1591        }
1592        kfree(desc);
1593        return NULL;
1594}
1595
1596/*********************** USB DEVICE CALLBACKS ***********************/
1597/*
1598 * Main calls from the USB subsystem.
1599 * Mostly registering a new irda-usb device and removing it....
1600 */
1601
1602/*------------------------------------------------------------------*/
1603/*
1604 * This routine is called by the USB subsystem for each new device
1605 * in the system. We need to check if the device is ours, and in
1606 * this case start handling it.
1607 * The USB layer protect us from reentrancy (via BKL), so we don't need
1608 * to spinlock in there... Jean II
1609 */
1610static int irda_usb_probe(struct usb_interface *intf,
1611                          const struct usb_device_id *id)
1612{
1613        struct net_device *net;
1614        struct usb_device *dev = interface_to_usbdev(intf);
1615        struct irda_usb_cb *self;
1616        struct usb_host_interface *interface;
1617        struct irda_class_desc *irda_desc;
1618        int ret = -ENOMEM;
1619        int i;          /* Driver instance index / Rx URB index */
1620
1621        /* Note : the probe make sure to call us only for devices that
1622         * matches the list of dongle (top of the file). So, we
1623         * don't need to check if the dongle is really ours.
1624         * Jean II */
1625
1626        IRDA_MESSAGE("IRDA-USB found at address %d, Vendor: %x, Product: %x\n",
1627                     dev->devnum, le16_to_cpu(dev->descriptor.idVendor),
1628                     le16_to_cpu(dev->descriptor.idProduct));
1629
1630        net = alloc_irdadev(sizeof(*self));
1631        if (!net) 
1632                goto err_out;
1633
1634        SET_NETDEV_DEV(net, &intf->dev);
1635        self = netdev_priv(net);
1636        self->netdev = net;
1637        spin_lock_init(&self->lock);
1638        init_timer(&self->rx_defer_timer);
1639
1640        self->capability = id->driver_info;
1641        self->needspatch = ((self->capability & IUC_STIR421X) != 0);
1642
1643        /* Create all of the needed urbs */
1644        if (self->capability & IUC_STIR421X) {
1645                self->max_rx_urb = IU_SIGMATEL_MAX_RX_URBS;
1646                self->header_length = USB_IRDA_STIR421X_HEADER;
1647        } else {
1648                self->max_rx_urb = IU_MAX_RX_URBS;
1649                self->header_length = USB_IRDA_HEADER;
1650        }
1651
1652        self->rx_urb = kcalloc(self->max_rx_urb, sizeof(struct urb *),
1653                                GFP_KERNEL);
1654        if (!self->rx_urb)
1655                goto err_free_net;
1656
1657        for (i = 0; i < self->max_rx_urb; i++) {
1658                self->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
1659                if (!self->rx_urb[i]) {
1660                        goto err_out_1;
1661                }
1662        }
1663        self->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1664        if (!self->tx_urb) {
1665                goto err_out_1;
1666        }
1667        self->speed_urb = usb_alloc_urb(0, GFP_KERNEL);
1668        if (!self->speed_urb) {
1669                goto err_out_2;
1670        }
1671
1672        /* Is this really necessary? (no, except maybe for broken devices) */
1673        if (usb_reset_configuration (dev) < 0) {
1674                dev_err(&intf->dev, "reset_configuration failed\n");
1675                ret = -EIO;
1676                goto err_out_3;
1677        }
1678
1679        /* Is this really necessary? */
1680        /* Note : some driver do hardcode the interface number, some others
1681         * specify an alternate, but very few driver do like this.
1682         * Jean II */
1683        ret = usb_set_interface(dev, intf->altsetting->desc.bInterfaceNumber, 0);
1684        IRDA_DEBUG(1, "usb-irda: set interface %d result %d\n", intf->altsetting->desc.bInterfaceNumber, ret);
1685        switch (ret) {
1686                case 0:
1687                        break;
1688                case -EPIPE:            /* -EPIPE = -32 */
1689                        /* Martin Diehl says if we get a -EPIPE we should
1690                         * be fine and we don't need to do a usb_clear_halt().
1691                         * - Jean II */
1692                        IRDA_DEBUG(0, "%s(), Received -EPIPE, ignoring...\n", __func__);
1693                        break;
1694                default:
1695                        IRDA_DEBUG(0, "%s(), Unknown error %d\n", __func__, ret);
1696                        ret = -EIO;
1697                        goto err_out_3;
1698        }
1699
1700        /* Find our endpoints */
1701        interface = intf->cur_altsetting;
1702        if(!irda_usb_parse_endpoints(self, interface->endpoint,
1703                                     interface->desc.bNumEndpoints)) {
1704                IRDA_ERROR("%s(), Bogus endpoints...\n", __func__);
1705                ret = -EIO;
1706                goto err_out_3;
1707        }
1708
1709        self->usbdev = dev;
1710
1711        /* Find IrDA class descriptor */
1712        irda_desc = irda_usb_find_class_desc(intf);
1713        ret = -ENODEV;
1714        if (!irda_desc)
1715                goto err_out_3;
1716
1717        if (self->needspatch) {
1718                ret = usb_control_msg (self->usbdev, usb_sndctrlpipe (self->usbdev, 0),
1719                                       0x02, 0x40, 0, 0, NULL, 0, 500);
1720                if (ret < 0) {
1721                        IRDA_DEBUG (0, "usb_control_msg failed %d\n", ret);
1722                        goto err_out_3;
1723                } else {
1724                        mdelay(10);
1725                }
1726        }
1727
1728        self->irda_desc =  irda_desc;
1729        self->present = 1;
1730        self->netopen = 0;
1731        self->usbintf = intf;
1732
1733        /* Allocate the buffer for speed changes */
1734        /* Don't change this buffer size and allocation without doing
1735         * some heavy and complete testing. Don't ask why :-(
1736         * Jean II */
1737        self->speed_buff = kzalloc(IRDA_USB_SPEED_MTU, GFP_KERNEL);
1738        if (!self->speed_buff)
1739                goto err_out_3;
1740
1741        self->tx_buff = kzalloc(IRDA_SKB_MAX_MTU + self->header_length,
1742                                GFP_KERNEL);
1743        if (!self->tx_buff)
1744                goto err_out_4;
1745
1746        ret = irda_usb_open(self);
1747        if (ret) 
1748                goto err_out_5;
1749
1750        IRDA_MESSAGE("IrDA: Registered device %s\n", net->name);
1751        usb_set_intfdata(intf, self);
1752
1753        if (self->needspatch) {
1754                /* Now we fetch and upload the firmware patch */
1755                ret = stir421x_patch_device(self);
1756                self->needspatch = (ret < 0);
1757                if (self->needspatch) {
1758                        IRDA_ERROR("STIR421X: Couldn't upload patch\n");
1759                        goto err_out_6;
1760                }
1761
1762                /* replace IrDA class descriptor with what patched device is now reporting */
1763                irda_desc = irda_usb_find_class_desc (self->usbintf);
1764                if (!irda_desc) {
1765                        ret = -ENODEV;
1766                        goto err_out_6;
1767                }
1768                kfree(self->irda_desc);
1769                self->irda_desc = irda_desc;
1770                irda_usb_init_qos(self);
1771        }
1772
1773        return 0;
1774err_out_6:
1775        unregister_netdev(self->netdev);
1776err_out_5:
1777        kfree(self->tx_buff);
1778err_out_4:
1779        kfree(self->speed_buff);
1780err_out_3:
1781        /* Free all urbs that we may have created */
1782        usb_free_urb(self->speed_urb);
1783err_out_2:
1784        usb_free_urb(self->tx_urb);
1785err_out_1:
1786        for (i = 0; i < self->max_rx_urb; i++)
1787                usb_free_urb(self->rx_urb[i]);
1788        kfree(self->rx_urb);
1789err_free_net:
1790        free_netdev(net);
1791err_out:
1792        return ret;
1793}
1794
1795/*------------------------------------------------------------------*/
1796/*
1797 * The current irda-usb device is removed, the USB layer tell us
1798 * to shut it down...
1799 * One of the constraints is that when we exit this function,
1800 * we cannot use the usb_device no more. Gone. Destroyed. kfree().
1801 * Most other subsystem allow you to destroy the instance at a time
1802 * when it's convenient to you, to postpone it to a later date, but
1803 * not the USB subsystem.
1804 * So, we must make bloody sure that everything gets deactivated.
1805 * Jean II
1806 */
1807static void irda_usb_disconnect(struct usb_interface *intf)
1808{
1809        unsigned long flags;
1810        struct irda_usb_cb *self = usb_get_intfdata(intf);
1811        int i;
1812
1813        IRDA_DEBUG(1, "%s()\n", __func__);
1814
1815        usb_set_intfdata(intf, NULL);
1816        if (!self)
1817                return;
1818
1819        /* Make sure that the Tx path is not executing. - Jean II */
1820        spin_lock_irqsave(&self->lock, flags);
1821
1822        /* Oups ! We are not there any more.
1823         * This will stop/desactivate the Tx path. - Jean II */
1824        self->present = 0;
1825
1826        /* Kill defered Rx URB */
1827        del_timer(&self->rx_defer_timer);
1828
1829        /* We need to have irq enabled to unlink the URBs. That's OK,
1830         * at this point the Tx path is gone - Jean II */
1831        spin_unlock_irqrestore(&self->lock, flags);
1832
1833        /* Hum... Check if networking is still active (avoid races) */
1834        if((self->netopen) || (self->irlap)) {
1835                /* Accept no more transmissions */
1836                /*netif_device_detach(self->netdev);*/
1837                netif_stop_queue(self->netdev);
1838                /* Stop all the receive URBs. Must be synchronous. */
1839                for (i = 0; i < self->max_rx_urb; i++)
1840                        usb_kill_urb(self->rx_urb[i]);
1841                /* Cancel Tx and speed URB.
1842                 * Make sure it's synchronous to avoid races. */
1843                usb_kill_urb(self->tx_urb);
1844                usb_kill_urb(self->speed_urb);
1845        }
1846
1847        /* Cleanup the device stuff */
1848        irda_usb_close(self);
1849        /* No longer attached to USB bus */
1850        self->usbdev = NULL;
1851        self->usbintf = NULL;
1852
1853        /* Clean up our urbs */
1854        for (i = 0; i < self->max_rx_urb; i++)
1855                usb_free_urb(self->rx_urb[i]);
1856        kfree(self->rx_urb);
1857        /* Clean up Tx and speed URB */
1858        usb_free_urb(self->tx_urb);
1859        usb_free_urb(self->speed_urb);
1860
1861        /* Free self and network device */
1862        free_netdev(self->netdev);
1863        IRDA_DEBUG(0, "%s(), USB IrDA Disconnected\n", __func__);
1864}
1865
1866#ifdef CONFIG_PM
1867/* USB suspend, so power off the transmitter/receiver */
1868static int irda_usb_suspend(struct usb_interface *intf, pm_message_t message)
1869{
1870        struct irda_usb_cb *self = usb_get_intfdata(intf);
1871        int i;
1872
1873        netif_device_detach(self->netdev);
1874
1875        if (self->tx_urb != NULL)
1876                usb_kill_urb(self->tx_urb);
1877        if (self->speed_urb != NULL)
1878                usb_kill_urb(self->speed_urb);
1879        for (i = 0; i < self->max_rx_urb; i++) {
1880                if (self->rx_urb[i] != NULL)
1881                        usb_kill_urb(self->rx_urb[i]);
1882        }
1883        return 0;
1884}
1885
1886/* Coming out of suspend, so reset hardware */
1887static int irda_usb_resume(struct usb_interface *intf)
1888{
1889        struct irda_usb_cb *self = usb_get_intfdata(intf);
1890        int i;
1891
1892        for (i = 0; i < self->max_rx_urb; i++) {
1893                if (self->rx_urb[i] != NULL)
1894                        usb_submit_urb(self->rx_urb[i], GFP_KERNEL);
1895        }
1896
1897        netif_device_attach(self->netdev);
1898        return 0;
1899}
1900#endif
1901
1902/*------------------------------------------------------------------*/
1903/*
1904 * USB device callbacks
1905 */
1906static struct usb_driver irda_driver = {
1907        .name           = "irda-usb",
1908        .probe          = irda_usb_probe,
1909        .disconnect     = irda_usb_disconnect,
1910        .id_table       = dongles,
1911#ifdef CONFIG_PM
1912        .suspend        = irda_usb_suspend,
1913        .resume         = irda_usb_resume,
1914#endif
1915};
1916
1917module_usb_driver(irda_driver);
1918
1919/*
1920 * Module parameters
1921 */
1922module_param(qos_mtt_bits, int, 0);
1923MODULE_PARM_DESC(qos_mtt_bits, "Minimum Turn Time");
1924MODULE_AUTHOR("Roman Weissgaerber <weissg@vienna.at>, Dag Brattli <dag@brattli.net>, Jean Tourrilhes <jt@hpl.hp.com> and Nick Fedchik <nick@fedchik.org.ua>");
1925MODULE_DESCRIPTION("IrDA-USB Dongle Driver");
1926MODULE_LICENSE("GPL");
1927