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                         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                 net_warn_ratelimited("%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
 541 drop:
 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  */
 552 static 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         /* We should always have a context */
 559         IRDA_ASSERT(self != NULL, return;);
 560         /* We should always be called for the speed URB */
 561         IRDA_ASSERT(urb == self->tx_urb, return;);
 562
 563         /* Free up the skb */
 564         dev_kfree_skb_any(skb);
 565         urb->context = NULL;
 566
 567         /* Check for timeout and other USB nasties */
 568         if (urb->status != 0) {
 569                 /* I get a lot of -ECONNABORTED = -103 here - Jean II */
 570                 pr_debug("%s(), URB complete status %d, transfer_flags 0x%04X\n",
 571                          __func__, urb->status, urb->transfer_flags);
 572
 573                 /* Don't do anything here, that might confuse the USB layer,
 574                  * and we could go in recursion and blow the kernel stack...
 575                  * Instead, we will wait for irda_usb_net_timeout(), the
 576                  * network layer watchdog, to fix the situation.
 577                  * Jean II */
 578                 /* A reset of the dongle might be welcomed here - Jean II */
 579                 return;
 580         }
 581
 582         /* urb is now available */
 583         //urb->status = 0; -> tested above
 584
 585         /* Make sure we read self->present properly */
 586         spin_lock_irqsave(&self->lock, flags);
 587
 588         /* If the network is closed, stop everything */
 589         if ((!self->netopen) || (!self->present)) {
 590                 pr_debug("%s(), Network is gone...\n", __func__);
 591                 spin_unlock_irqrestore(&self->lock, flags);
 592                 return;
 593         }
 594
 595         /* If changes to speed or xbofs is pending... */
 596         if ((self->new_speed != -1) || (self->new_xbofs != -1)) {
 597                 if ((self->new_speed != self->speed) ||
 598                     (self->new_xbofs != self->xbofs)) {
 599                         /* We haven't changed speed yet (because of
 600                          * IUC_SPEED_BUG), so do it now - Jean II */
 601                         pr_debug("%s(), Changing speed now...\n", __func__);
 602                         irda_usb_change_speed_xbofs(self);
 603                 } else {
 604                         /* New speed and xbof is now committed in hardware */
 605                         self->new_speed = -1;
 606                         self->new_xbofs = -1;
 607                         /* Done, waiting for next packet */
 608                         netif_wake_queue(self->netdev);
 609                 }
 610         } else {
 611                 /* Otherwise, allow the stack to send more packets */
 612                 netif_wake_queue(self->netdev);
 613         }
 614         spin_unlock_irqrestore(&self->lock, flags);
 615 }
 616
 617 /*------------------------------------------------------------------*/
 618 /*
 619  * Watchdog timer from the network layer.
 620  * After a predetermined timeout, if we don't give confirmation that
 621  * the packet has been sent (i.e. no call to netif_wake_queue()),
 622  * the network layer will call this function.
 623  * Note that URB that we submit have also a timeout. When the URB timeout
 624  * expire, the normal URB callback is called (write_bulk_callback()).
 625  */
 626 static void irda_usb_net_timeout(struct net_device *netdev)
 627 {
 628         unsigned long flags;
 629         struct irda_usb_cb *self = netdev_priv(netdev);
 630         struct urb *urb;
 631         int     done = 0;       /* If we have made any progress */
 632
 633         pr_debug("%s(), Network layer thinks we timed out!\n", __func__);
 634         IRDA_ASSERT(self != NULL, return;);
 635
 636         /* Protect us from USB callbacks, net Tx and else. */
 637         spin_lock_irqsave(&self->lock, flags);
 638
 639         /* self->present *MUST* be read under spinlock */
 640         if (!self->present) {
 641                 net_warn_ratelimited("%s(), device not present!\n", __func__);
 642                 netif_stop_queue(netdev);
 643                 spin_unlock_irqrestore(&self->lock, flags);
 644                 return;
 645         }
 646
 647         /* Check speed URB */
 648         urb = self->speed_urb;
 649         if (urb->status != 0) {
 650                 pr_debug("%s: Speed change timed out, urb->status=%d, urb->transfer_flags=0x%04X\n",
 651                          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                 pr_debug("%s: Tx timed out, urb->status=%d, urb->transfer_flags=0x%04X\n",
 677                          netdev->name, urb->status, urb->transfer_flags);
 678
 679                 /* Increase error count */
 680                 netdev->stats.tx_errors++;
 681
 682 #ifdef IU_BUG_KICK_TIMEOUT
 683                 /* Can't be a bad idea to reset the speed ;-) - Jean II */
 684                 if(self->new_speed == -1)
 685                         self->new_speed = self->speed;
 686                 if(self->new_xbofs == -1)
 687                         self->new_xbofs = self->xbofs;
 688                 irda_usb_change_speed_xbofs(self);
 689 #endif /* IU_BUG_KICK_TIMEOUT */
 690
 691                 switch (urb->status) {
 692                 case -EINPROGRESS:
 693                         usb_unlink_urb(urb);
 694                         /* Note : above will  *NOT* call netif_wake_queue()
 695                          * in completion handler, because urb->status will
 696                          * be -ENOENT. We will fix that at the next watchdog,
 697                          * leaving more time to USB to recover...
 698                          * Jean II */
 699                         done = 1;
 700                         break;
 701                 case -ECONNRESET:
 702                 case -ENOENT:                   /* urb unlinked by us */
 703                 default:                        /* ??? - Play safe */
 704                         if(skb != NULL) {
 705                                 dev_kfree_skb_any(skb);
 706                                 urb->context = NULL;
 707                         }
 708                         urb->status = 0;
 709                         netif_wake_queue(self->netdev);
 710                         done = 1;
 711                         break;
 712                 }
 713         }
 714         spin_unlock_irqrestore(&self->lock, flags);
 715
 716         /* Maybe we need a reset */
 717         /* Note : Some drivers seem to use a usb_set_interface() when they
 718          * need to reset the hardware. Hum...
 719          */
 720
 721         /* if(done == 0) */
 722 }
 723
 724 /************************* RECEIVE ROUTINES *************************/
 725 /*
 726  * Receive packets from the USB layer stack and pass them to the IrDA stack.
 727  * Try to work around USB failures...
 728  */
 729
 730 /*
 731  * Note :
 732  * Some of you may have noticed that most dongle have an interrupt in pipe
 733  * that we don't use. Here is the little secret...
 734  * When we hang a Rx URB on the bulk in pipe, it generates some USB traffic
 735  * in every USB frame. This is unnecessary overhead.
 736  * The interrupt in pipe will generate an event every time a packet is
 737  * received. Reading an interrupt pipe adds minimal overhead, but has some
 738  * latency (~1ms).
 739  * If we are connected (speed != 9600), we want to minimise latency, so
 740  * we just always hang the Rx URB and ignore the interrupt.
 741  * If we are not connected (speed == 9600), there is usually no Rx traffic,
 742  * and we want to minimise the USB overhead. In this case we should wait
 743  * on the interrupt pipe and hang the Rx URB only when an interrupt is
 744  * received.
 745  * Jean II
 746  *
 747  * Note : don't read the above as what we are currently doing, but as
 748  * something we could do with KC dongle. Also don't forget that the
 749  * interrupt pipe is not part of the original standard, so this would
 750  * need to be optional...
 751  * Jean II
 752  */
 753
 754 /*------------------------------------------------------------------*/
 755 /*
 756  * Submit a Rx URB to the USB layer to handle reception of a frame
 757  * Mostly called by the completion callback of the previous URB.
 758  *
 759  * Jean II
 760  */
 761 static void irda_usb_submit(struct irda_usb_cb *self, struct sk_buff *skb, struct urb *urb)
 762 {
 763         struct irda_skb_cb *cb;
 764         int ret;
 765
 766         /* This should never happen */
 767         IRDA_ASSERT(skb != NULL, return;);
 768         IRDA_ASSERT(urb != NULL, return;);
 769
 770         /* Save ourselves in the skb */
 771         cb = (struct irda_skb_cb *) skb->cb;
 772         cb->context = self;
 773
 774         /* Reinitialize URB */
 775         usb_fill_bulk_urb(urb, self->usbdev,
 776                       usb_rcvbulkpipe(self->usbdev, self->bulk_in_ep),
 777                       skb->data, IRDA_SKB_MAX_MTU,
 778                       irda_usb_receive, skb);
 779         urb->status = 0;
 780
 781         /* Can be called from irda_usb_receive (irq handler) -> GFP_ATOMIC */
 782         ret = usb_submit_urb(urb, GFP_ATOMIC);
 783         if (ret) {
 784                 /* If this ever happen, we are in deep s***.
 785                  * Basically, the Rx path will stop... */
 786                 net_warn_ratelimited("%s(), Failed to submit Rx URB %d\n",
 787                                      __func__, ret);
 788         }
 789 }
 790
 791 /*------------------------------------------------------------------*/
 792 /*
 793  * Function irda_usb_receive(urb)
 794  *
 795  *     Called by the USB subsystem when a frame has been received
 796  *
 797  */
 798 static void irda_usb_receive(struct urb *urb)
 799 {
 800         struct sk_buff *skb = (struct sk_buff *) urb->context;
 801         struct irda_usb_cb *self;
 802         struct irda_skb_cb *cb;
 803         struct sk_buff *newskb;
 804         struct sk_buff *dataskb;
 805         struct urb *next_urb;
 806         unsigned int len, docopy;
 807
 808         pr_debug("%s(), len=%d\n", __func__, urb->actual_length);
 809
 810         /* Find ourselves */
 811         cb = (struct irda_skb_cb *) skb->cb;
 812         IRDA_ASSERT(cb != NULL, return;);
 813         self = (struct irda_usb_cb *) cb->context;
 814         IRDA_ASSERT(self != NULL, return;);
 815
 816         /* If the network is closed or the device gone, stop everything */
 817         if ((!self->netopen) || (!self->present)) {
 818                 pr_debug("%s(), Network is gone!\n", __func__);
 819                 /* Don't re-submit the URB : will stall the Rx path */
 820                 return;
 821         }
 822
 823         /* Check the status */
 824         if (urb->status != 0) {
 825                 switch (urb->status) {
 826                 case -EILSEQ:
 827                         self->netdev->stats.rx_crc_errors++;
 828                         /* Also precursor to a hot-unplug on UHCI. */
 829                         /* Fallthrough... */
 830                 case -ECONNRESET:
 831                         /* Random error, if I remember correctly */
 832                         /* uhci_cleanup_unlink() is going to kill the Rx
 833                          * URB just after we return. No problem, at this
 834                          * point the URB will be idle ;-) - Jean II */
 835                 case -ESHUTDOWN:
 836                         /* That's usually a hot-unplug. Submit will fail... */
 837                 case -ETIME:
 838                         /* Usually precursor to a hot-unplug on OHCI. */
 839                 default:
 840                         self->netdev->stats.rx_errors++;
 841                         pr_debug("%s(), RX status %d, transfer_flags 0x%04X\n",
 842                                  __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                 net_warn_ratelimited("%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
 932 done:
 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  */
 960 static 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         /* Find ourselves */
 969         cb = (struct irda_skb_cb *) skb->cb;
 970         IRDA_ASSERT(cb != NULL, return;);
 971         self = (struct irda_usb_cb *) cb->context;
 972         IRDA_ASSERT(self != NULL, return;);
 973
 974         /* Same stuff as when Rx is done, see above... */
 975         next_urb = self->idle_rx_urb;
 976         urb->context = NULL;
 977         self->idle_rx_urb = urb;
 978         irda_usb_submit(self, skb, next_urb);
 979 }
 980
 981 /*------------------------------------------------------------------*/
 982 /*
 983  * Callbak from IrDA layer. IrDA wants to know if we have
 984  * started receiving anything.
 985  */
 986 static int irda_usb_is_receiving(struct irda_usb_cb *self)
 987 {
 988         /* Note : because of the way UHCI works, it's almost impossible
 989          * to get this info. The Controller DMA directly to memory and
 990          * signal only when the whole frame is finished. To know if the
 991          * first TD of the URB has been filled or not seems hard work...
 992          *
 993          * The other solution would be to use the "receiving" command
 994          * on the default decriptor with a usb_control_msg(), but that
 995          * would add USB traffic and would return result only in the
 996          * next USB frame (~1ms).
 997          *
 998          * I've been told that current dongles send status info on their
 999          * interrupt endpoint, and that's what the Windows driver uses
1000          * to know this info. Unfortunately, this is not yet in the spec...
1001          *
1002          * Jean II
1003          */
1004
1005         return 0; /* For now */
1006 }
1007
1008 #define STIR421X_PATCH_PRODUCT_VER     "Product Version: "
1009 #define STIR421X_PATCH_STMP_TAG        "STMP"
1010 #define STIR421X_PATCH_CODE_OFFSET     512 /* patch image starts before here */
1011 /* marks end of patch file header (PC DOS text file EOF character) */
1012 #define STIR421X_PATCH_END_OF_HDR_TAG  0x1A
1013 #define STIR421X_PATCH_BLOCK_SIZE      1023
1014
1015 /*
1016  * Function stir421x_fwupload (struct irda_usb_cb *self,
1017  *                             unsigned char *patch,
1018  *                             const unsigned int patch_len)
1019  *
1020  *   Upload firmware code to SigmaTel 421X IRDA-USB dongle
1021  */
1022 static int stir421x_fw_upload(struct irda_usb_cb *self,
1023                              const unsigned char *patch,
1024                              const unsigned int patch_len)
1025 {
1026         int ret = -ENOMEM;
1027         int actual_len = 0;
1028         unsigned int i;
1029         unsigned int block_size = 0;
1030         unsigned char *patch_block;
1031
1032         patch_block = kzalloc(STIR421X_PATCH_BLOCK_SIZE, GFP_KERNEL);
1033         if (patch_block == NULL)
1034                 return -ENOMEM;
1035
1036         /* break up patch into 1023-byte sections */
1037         for (i = 0; i < patch_len; i += block_size) {
1038                 block_size = patch_len - i;
1039
1040                 if (block_size > STIR421X_PATCH_BLOCK_SIZE)
1041                         block_size = STIR421X_PATCH_BLOCK_SIZE;
1042
1043                 /* upload the patch section */
1044                 memcpy(patch_block, patch + i, block_size);
1045
1046                 ret = usb_bulk_msg(self->usbdev,
1047                                    usb_sndbulkpipe(self->usbdev,
1048                                                    self->bulk_out_ep),
1049                                    patch_block, block_size,
1050                                    &actual_len, msecs_to_jiffies(500));
1051                 pr_debug("%s(): Bulk send %u bytes, ret=%d\n",
1052                          __func__, actual_len, ret);
1053
1054                 if (ret < 0)
1055                         break;
1056
1057                 mdelay(10);
1058         }
1059
1060         kfree(patch_block);
1061
1062         return ret;
1063  }
1064
1065 /*
1066  * Function stir421x_patch_device(struct irda_usb_cb *self)
1067  *
1068  * Get a firmware code from userspase using hotplug request_firmware() call
1069   */
1070 static int stir421x_patch_device(struct irda_usb_cb *self)
1071 {
1072         unsigned int i;
1073         int ret;
1074         char stir421x_fw_name[12];
1075         const struct firmware *fw;
1076         const unsigned char *fw_version_ptr; /* pointer to version string */
1077         unsigned long fw_version = 0;
1078
1079         /*
1080          * Known firmware patch file names for STIR421x dongles
1081          * are "42101001.sb" or "42101002.sb"
1082          */
1083         sprintf(stir421x_fw_name, "4210%4X.sb",
1084                 self->usbdev->descriptor.bcdDevice);
1085         ret = request_firmware(&fw, stir421x_fw_name, &self->usbdev->dev);
1086         if (ret < 0)
1087                 return ret;
1088
1089         /* We get a patch from userspace */
1090         net_info_ratelimited("%s(): Received firmware %s (%zu bytes)\n",
1091                              __func__, stir421x_fw_name, fw->size);
1092
1093         ret = -EINVAL;
1094
1095         /* Get the bcd product version */
1096         if (!memcmp(fw->data, STIR421X_PATCH_PRODUCT_VER,
1097                     sizeof(STIR421X_PATCH_PRODUCT_VER) - 1)) {
1098                 fw_version_ptr = fw->data +
1099                         sizeof(STIR421X_PATCH_PRODUCT_VER) - 1;
1100
1101                 /* Let's check if the product version is dotted */
1102                 if (fw_version_ptr[3] == '.' &&
1103                     fw_version_ptr[7] == '.') {
1104                         unsigned long major, minor, build;
1105                         major = simple_strtoul(fw_version_ptr, NULL, 10);
1106                         minor = simple_strtoul(fw_version_ptr + 4, NULL, 10);
1107                         build = simple_strtoul(fw_version_ptr + 8, NULL, 10);
1108
1109                         fw_version = (major << 12)
1110                                 + (minor << 8)
1111                                 + ((build / 10) << 4)
1112                                 + (build % 10);
1113
1114                         pr_debug("%s(): Firmware Product version %ld\n",
1115                                  __func__, fw_version);
1116                 }
1117         }
1118
1119         if (self->usbdev->descriptor.bcdDevice == cpu_to_le16(fw_version)) {
1120                 /*
1121                  * If we're here, we've found a correct patch
1122                  * The actual image starts after the "STMP" keyword
1123                  * so forward to the firmware header tag
1124                  */
1125                 for (i = 0; i < fw->size && fw->data[i] !=
1126                              STIR421X_PATCH_END_OF_HDR_TAG; i++) ;
1127                 /* here we check for the out of buffer case */
1128                 if (i < STIR421X_PATCH_CODE_OFFSET && i < fw->size &&
1129                                 STIR421X_PATCH_END_OF_HDR_TAG == fw->data[i]) {
1130                         if (!memcmp(fw->data + i + 1, STIR421X_PATCH_STMP_TAG,
1131                                     sizeof(STIR421X_PATCH_STMP_TAG) - 1)) {
1132
1133                                 /* We can upload the patch to the target */
1134                                 i += sizeof(STIR421X_PATCH_STMP_TAG);
1135                                 ret = stir421x_fw_upload(self, &fw->data[i],
1136                                                          fw->size - i);
1137                         }
1138                 }
1139         }
1140
1141         release_firmware(fw);
1142
1143         return ret;
1144 }
1145
1146
1147 /********************** IRDA DEVICE CALLBACKS **********************/
1148 /*
1149  * Main calls from the IrDA/Network subsystem.
1150  * Mostly registering a new irda-usb device and removing it....
1151  * We only deal with the IrDA side of the business, the USB side will
1152  * be dealt with below...
1153  */
1154
1155
1156 /*------------------------------------------------------------------*/
1157 /*
1158  * Function irda_usb_net_open (dev)
1159  *
1160  *    Network device is taken up. Usually this is done by "ifconfig irda0 up"
1161  *
1162  * Note : don't mess with self->netopen - Jean II
1163  */
1164 static int irda_usb_net_open(struct net_device *netdev)
1165 {
1166         struct irda_usb_cb *self;
1167         unsigned long flags;
1168         char    hwname[16];
1169         int i;
1170
1171         IRDA_ASSERT(netdev != NULL, return -1;);
1172         self = netdev_priv(netdev);
1173         IRDA_ASSERT(self != NULL, return -1;);
1174
1175         spin_lock_irqsave(&self->lock, flags);
1176         /* Can only open the device if it's there */
1177         if(!self->present) {
1178                 spin_unlock_irqrestore(&self->lock, flags);
1179                 net_warn_ratelimited("%s(), device not present!\n", __func__);
1180                 return -1;
1181         }
1182
1183         if(self->needspatch) {
1184                 spin_unlock_irqrestore(&self->lock, flags);
1185                 net_warn_ratelimited("%s(), device needs patch\n", __func__);
1186                 return -EIO ;
1187         }
1188
1189         /* Initialise default speed and xbofs value
1190          * (IrLAP will change that soon) */
1191         self->speed = -1;
1192         self->xbofs = -1;
1193         self->new_speed = -1;
1194         self->new_xbofs = -1;
1195
1196         /* To do *before* submitting Rx urbs and starting net Tx queue
1197          * Jean II */
1198         self->netopen = 1;
1199         spin_unlock_irqrestore(&self->lock, flags);
1200
1201         /*
1202          * Now that everything should be initialized properly,
1203          * Open new IrLAP layer instance to take care of us...
1204          * Note : will send immediately a speed change...
1205          */
1206         sprintf(hwname, "usb#%d", self->usbdev->devnum);
1207         self->irlap = irlap_open(netdev, &self->qos, hwname);
1208         IRDA_ASSERT(self->irlap != NULL, return -1;);
1209
1210         /* Allow IrLAP to send data to us */
1211         netif_start_queue(netdev);
1212
1213         /* We submit all the Rx URB except for one that we keep idle.
1214          * Need to be initialised before submitting other USBs, because
1215          * in some cases as soon as we submit the URBs the USB layer
1216          * will trigger a dummy receive - Jean II */
1217         self->idle_rx_urb = self->rx_urb[IU_MAX_ACTIVE_RX_URBS];
1218         self->idle_rx_urb->context = NULL;
1219
1220         /* Now that we can pass data to IrLAP, allow the USB layer
1221          * to send us some data... */
1222         for (i = 0; i < IU_MAX_ACTIVE_RX_URBS; i++) {
1223                 struct sk_buff *skb = dev_alloc_skb(IRDA_SKB_MAX_MTU);
1224                 if (!skb) {
1225                         /* If this ever happen, we are in deep s***.
1226                          * Basically, we can't start the Rx path... */
1227                         return -1;
1228                 }
1229                 //skb_reserve(newskb, USB_IRDA_HEADER - 1);
1230                 irda_usb_submit(self, skb, self->rx_urb[i]);
1231         }
1232
1233         /* Ready to play !!! */
1234         return 0;
1235 }
1236
1237 /*------------------------------------------------------------------*/
1238 /*
1239  * Function irda_usb_net_close (self)
1240  *
1241  *    Network device is taken down. Usually this is done by
1242  *    "ifconfig irda0 down"
1243  */
1244 static int irda_usb_net_close(struct net_device *netdev)
1245 {
1246         struct irda_usb_cb *self;
1247         int     i;
1248
1249         IRDA_ASSERT(netdev != NULL, return -1;);
1250         self = netdev_priv(netdev);
1251         IRDA_ASSERT(self != NULL, return -1;);
1252
1253         /* Clear this flag *before* unlinking the urbs and *before*
1254          * stopping the network Tx queue - Jean II */
1255         self->netopen = 0;
1256
1257         /* Stop network Tx queue */
1258         netif_stop_queue(netdev);
1259
1260         /* Kill defered Rx URB */
1261         del_timer(&self->rx_defer_timer);
1262
1263         /* Deallocate all the Rx path buffers (URBs and skb) */
1264         for (i = 0; i < self->max_rx_urb; i++) {
1265                 struct urb *urb = self->rx_urb[i];
1266                 struct sk_buff *skb = (struct sk_buff *) urb->context;
1267                 /* Cancel the receive command */
1268                 usb_kill_urb(urb);
1269                 /* The skb is ours, free it */
1270                 if(skb) {
1271                         dev_kfree_skb(skb);
1272                         urb->context = NULL;
1273                 }
1274         }
1275         /* Cancel Tx and speed URB - need to be synchronous to avoid races */
1276         usb_kill_urb(self->tx_urb);
1277         usb_kill_urb(self->speed_urb);
1278
1279         /* Stop and remove instance of IrLAP */
1280         if (self->irlap)
1281                 irlap_close(self->irlap);
1282         self->irlap = NULL;
1283
1284         return 0;
1285 }
1286
1287 /*------------------------------------------------------------------*/
1288 /*
1289  * IOCTLs : Extra out-of-band network commands...
1290  */
1291 static int irda_usb_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1292 {
1293         unsigned long flags;
1294         struct if_irda_req *irq = (struct if_irda_req *) rq;
1295         struct irda_usb_cb *self;
1296         int ret = 0;
1297
1298         IRDA_ASSERT(dev != NULL, return -1;);
1299         self = netdev_priv(dev);
1300         IRDA_ASSERT(self != NULL, return -1;);
1301
1302         pr_debug("%s(), %s, (cmd=0x%X)\n", __func__, dev->name, cmd);
1303
1304         switch (cmd) {
1305         case SIOCSBANDWIDTH: /* Set bandwidth */
1306                 if (!capable(CAP_NET_ADMIN))
1307                         return -EPERM;
1308                 /* Protect us from USB callbacks, net watchdog and else. */
1309                 spin_lock_irqsave(&self->lock, flags);
1310                 /* Check if the device is still there */
1311                 if(self->present) {
1312                         /* Set the desired speed */
1313                         self->new_speed = irq->ifr_baudrate;
1314                         irda_usb_change_speed_xbofs(self);
1315                 }
1316                 spin_unlock_irqrestore(&self->lock, flags);
1317                 break;
1318         case SIOCSMEDIABUSY: /* Set media busy */
1319                 if (!capable(CAP_NET_ADMIN))
1320                         return -EPERM;
1321                 /* Check if the IrDA stack is still there */
1322                 if(self->netopen)
1323                         irda_device_set_media_busy(self->netdev, TRUE);
1324                 break;
1325         case SIOCGRECEIVING: /* Check if we are receiving right now */
1326                 irq->ifr_receiving = irda_usb_is_receiving(self);
1327                 break;
1328         default:
1329                 ret = -EOPNOTSUPP;
1330         }
1331
1332         return ret;
1333 }
1334
1335 /*------------------------------------------------------------------*/
1336
1337 /********************* IRDA CONFIG SUBROUTINES *********************/
1338 /*
1339  * Various subroutines dealing with IrDA and network stuff we use to
1340  * configure and initialise each irda-usb instance.
1341  * These functions are used below in the main calls of the driver...
1342  */
1343
1344 /*------------------------------------------------------------------*/
1345 /*
1346  * Set proper values in the IrDA QOS structure
1347  */
1348 static inline void irda_usb_init_qos(struct irda_usb_cb *self)
1349 {
1350         struct irda_class_desc *desc;
1351
1352
1353         desc = self->irda_desc;
1354
1355         /* Initialize QoS for this device */
1356         irda_init_max_qos_capabilies(&self->qos);
1357
1358         /* See spec section 7.2 for meaning.
1359          * Values are little endian (as most USB stuff), the IrDA stack
1360          * use it in native order (see parameters.c). - Jean II */
1361         self->qos.baud_rate.bits       = le16_to_cpu(desc->wBaudRate);
1362         self->qos.min_turn_time.bits   = desc->bmMinTurnaroundTime;
1363         self->qos.additional_bofs.bits = desc->bmAdditionalBOFs;
1364         self->qos.window_size.bits     = desc->bmWindowSize;
1365         self->qos.data_size.bits       = desc->bmDataSize;
1366
1367         pr_debug("%s(), dongle says speed=0x%X, size=0x%X, window=0x%X, bofs=0x%X, turn=0x%X\n",
1368                  __func__, self->qos.baud_rate.bits, self->qos.data_size.bits,
1369                  self->qos.window_size.bits, self->qos.additional_bofs.bits,
1370                  self->qos.min_turn_time.bits);
1371
1372         /* Don't always trust what the dongle tell us */
1373         if(self->capability & IUC_SIR_ONLY)
1374                 self->qos.baud_rate.bits        &= 0x00ff;
1375         if(self->capability & IUC_SMALL_PKT)
1376                 self->qos.data_size.bits         = 0x07;
1377         if(self->capability & IUC_NO_WINDOW)
1378                 self->qos.window_size.bits       = 0x01;
1379         if(self->capability & IUC_MAX_WINDOW)
1380                 self->qos.window_size.bits       = 0x7f;
1381         if(self->capability & IUC_MAX_XBOFS)
1382                 self->qos.additional_bofs.bits   = 0x01;
1383
1384 #if 1
1385         /* Module parameter can override the rx window size */
1386         if (qos_mtt_bits)
1387                 self->qos.min_turn_time.bits = qos_mtt_bits;
1388 #endif
1389         /*
1390          * Note : most of those values apply only for the receive path,
1391          * the transmit path will be set differently - Jean II
1392          */
1393         irda_qos_bits_to_value(&self->qos);
1394 }
1395
1396 /*------------------------------------------------------------------*/
1397 static const struct net_device_ops irda_usb_netdev_ops = {
1398         .ndo_open       = irda_usb_net_open,
1399         .ndo_stop       = irda_usb_net_close,
1400         .ndo_do_ioctl   = irda_usb_net_ioctl,
1401         .ndo_start_xmit = irda_usb_hard_xmit,
1402         .ndo_tx_timeout = irda_usb_net_timeout,
1403 };
1404
1405 /*
1406  * Initialise the network side of the irda-usb instance
1407  * Called when a new USB instance is registered in irda_usb_probe()
1408  */
1409 static inline int irda_usb_open(struct irda_usb_cb *self)
1410 {
1411         struct net_device *netdev = self->netdev;
1412
1413         netdev->netdev_ops = &irda_usb_netdev_ops;
1414
1415         irda_usb_init_qos(self);
1416
1417         return register_netdev(netdev);
1418 }
1419
1420 /*------------------------------------------------------------------*/
1421 /*
1422  * Cleanup the network side of the irda-usb instance
1423  * Called when a USB instance is removed in irda_usb_disconnect()
1424  */
1425 static inline void irda_usb_close(struct irda_usb_cb *self)
1426 {
1427         /* Remove netdevice */
1428         unregister_netdev(self->netdev);
1429
1430         /* Remove the speed buffer */
1431         kfree(self->speed_buff);
1432         self->speed_buff = NULL;
1433
1434         kfree(self->tx_buff);
1435         self->tx_buff = NULL;
1436 }
1437
1438 /********************** USB CONFIG SUBROUTINES **********************/
1439 /*
1440  * Various subroutines dealing with USB stuff we use to configure and
1441  * initialise each irda-usb instance.
1442  * These functions are used below in the main calls of the driver...
1443  */
1444
1445 /*------------------------------------------------------------------*/
1446 /*
1447  * Function irda_usb_parse_endpoints(dev, ifnum)
1448  *
1449  *    Parse the various endpoints and find the one we need.
1450  *
1451  * The endpoint are the pipes used to communicate with the USB device.
1452  * The spec defines 2 endpoints of type bulk transfer, one in, and one out.
1453  * These are used to pass frames back and forth with the dongle.
1454  * Most dongle have also an interrupt endpoint, that will be probably
1455  * documented in the next spec...
1456  */
1457 static inline int irda_usb_parse_endpoints(struct irda_usb_cb *self, struct usb_host_endpoint *endpoint, int ennum)
1458 {
1459         int i;          /* Endpoint index in table */
1460
1461         /* Init : no endpoints */
1462         self->bulk_in_ep = 0;
1463         self->bulk_out_ep = 0;
1464         self->bulk_int_ep = 0;
1465
1466         /* Let's look at all those endpoints */
1467         for(i = 0; i < ennum; i++) {
1468                 /* All those variables will get optimised by the compiler,
1469                  * so let's aim for clarity... - Jean II */
1470                 __u8 ep;        /* Endpoint address */
1471                 __u8 dir;       /* Endpoint direction */
1472                 __u8 attr;      /* Endpoint attribute */
1473                 __u16 psize;    /* Endpoint max packet size in bytes */
1474
1475                 /* Get endpoint address, direction and attribute */
1476                 ep = endpoint[i].desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1477                 dir = endpoint[i].desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK;
1478                 attr = endpoint[i].desc.bmAttributes;
1479                 psize = le16_to_cpu(endpoint[i].desc.wMaxPacketSize);
1480
1481                 /* Is it a bulk endpoint ??? */
1482                 if(attr == USB_ENDPOINT_XFER_BULK) {
1483                         /* We need to find an IN and an OUT */
1484                         if(dir == USB_DIR_IN) {
1485                                 /* This is our Rx endpoint */
1486                                 self->bulk_in_ep = ep;
1487                         } else {
1488                                 /* This is our Tx endpoint */
1489                                 self->bulk_out_ep = ep;
1490                                 self->bulk_out_mtu = psize;
1491                         }
1492                 } else {
1493                         if((attr == USB_ENDPOINT_XFER_INT) &&
1494                            (dir == USB_DIR_IN)) {
1495                                 /* This is our interrupt endpoint */
1496                                 self->bulk_int_ep = ep;
1497                         } else {
1498                                 net_err_ratelimited("%s(), Unrecognised endpoint %02X\n",
1499                                                     __func__, ep);
1500                         }
1501                 }
1502         }
1503
1504         pr_debug("%s(), And our endpoints are : in=%02X, out=%02X (%d), int=%02X\n",
1505                  __func__, self->bulk_in_ep, self->bulk_out_ep,
1506                  self->bulk_out_mtu, self->bulk_int_ep);
1507
1508         return (self->bulk_in_ep != 0) && (self->bulk_out_ep != 0);
1509 }
1510
1511 #ifdef IU_DUMP_CLASS_DESC
1512 /*------------------------------------------------------------------*/
1513 /*
1514  * Function usb_irda_dump_class_desc(desc)
1515  *
1516  *    Prints out the contents of the IrDA class descriptor
1517  *
1518  */
1519 static inline void irda_usb_dump_class_desc(struct irda_class_desc *desc)
1520 {
1521         /* Values are little endian */
1522         printk("bLength=%x\n", desc->bLength);
1523         printk("bDescriptorType=%x\n", desc->bDescriptorType);
1524         printk("bcdSpecRevision=%x\n", le16_to_cpu(desc->bcdSpecRevision));
1525         printk("bmDataSize=%x\n", desc->bmDataSize);
1526         printk("bmWindowSize=%x\n", desc->bmWindowSize);
1527         printk("bmMinTurnaroundTime=%d\n", desc->bmMinTurnaroundTime);
1528         printk("wBaudRate=%x\n", le16_to_cpu(desc->wBaudRate));
1529         printk("bmAdditionalBOFs=%x\n", desc->bmAdditionalBOFs);
1530         printk("bIrdaRateSniff=%x\n", desc->bIrdaRateSniff);
1531         printk("bMaxUnicastList=%x\n", desc->bMaxUnicastList);
1532 }
1533 #endif /* IU_DUMP_CLASS_DESC */
1534
1535 /*------------------------------------------------------------------*/
1536 /*
1537  * Function irda_usb_find_class_desc(intf)
1538  *
1539  *    Returns instance of IrDA class descriptor, or NULL if not found
1540  *
1541  * The class descriptor is some extra info that IrDA USB devices will
1542  * offer to us, describing their IrDA characteristics. We will use that in
1543  * irda_usb_init_qos()
1544  */
1545 static inline struct irda_class_desc *irda_usb_find_class_desc(struct usb_interface *intf)
1546 {
1547         struct usb_device *dev = interface_to_usbdev (intf);
1548         struct irda_class_desc *desc;
1549         int ret;
1550
1551         desc = kzalloc(sizeof(*desc), GFP_KERNEL);
1552         if (!desc)
1553                 return NULL;
1554
1555         /* USB-IrDA class spec 1.0:
1556          *      6.1.3: Standard "Get Descriptor" Device Request is not
1557          *             appropriate to retrieve class-specific descriptor
1558          *      6.2.5: Class Specific "Get Class Descriptor" Interface Request
1559          *             is mandatory and returns the USB-IrDA class descriptor
1560          */
1561
1562         ret = usb_control_msg(dev, usb_rcvctrlpipe(dev,0),
1563                 IU_REQ_GET_CLASS_DESC,
1564                 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
1565                 0, intf->altsetting->desc.bInterfaceNumber, desc,
1566                 sizeof(*desc), 500);
1567
1568         pr_debug("%s(), ret=%d\n", __func__, ret);
1569         if (ret < sizeof(*desc)) {
1570                 net_warn_ratelimited("usb-irda: class_descriptor read %s (%d)\n",
1571                                      ret < 0 ? "failed" : "too short", ret);
1572         }
1573         else if (desc->bDescriptorType != USB_DT_IRDA) {
1574                 net_warn_ratelimited("usb-irda: bad class_descriptor type\n");
1575         }
1576         else {
1577 #ifdef IU_DUMP_CLASS_DESC
1578                 irda_usb_dump_class_desc(desc);
1579 #endif  /* IU_DUMP_CLASS_DESC */
1580
1581                 return desc;
1582         }
1583         kfree(desc);
1584         return NULL;
1585 }
1586
1587 /*********************** USB DEVICE CALLBACKS ***********************/
1588 /*
1589  * Main calls from the USB subsystem.
1590  * Mostly registering a new irda-usb device and removing it....
1591  */
1592
1593 /*------------------------------------------------------------------*/
1594 /*
1595  * This routine is called by the USB subsystem for each new device
1596  * in the system. We need to check if the device is ours, and in
1597  * this case start handling it.
1598  * The USB layer protect us from reentrancy (via BKL), so we don't need
1599  * to spinlock in there... Jean II
1600  */
1601 static int irda_usb_probe(struct usb_interface *intf,
1602                           const struct usb_device_id *id)
1603 {
1604         struct net_device *net;
1605         struct usb_device *dev = interface_to_usbdev(intf);
1606         struct irda_usb_cb *self;
1607         struct usb_host_interface *interface;
1608         struct irda_class_desc *irda_desc;
1609         int ret = -ENOMEM;
1610         int i;          /* Driver instance index / Rx URB index */
1611
1612         /* Note : the probe make sure to call us only for devices that
1613          * matches the list of dongle (top of the file). So, we
1614          * don't need to check if the dongle is really ours.
1615          * Jean II */
1616
1617         net_info_ratelimited("IRDA-USB found at address %d, Vendor: %x, Product: %x\n",
1618                              dev->devnum, le16_to_cpu(dev->descriptor.idVendor),
1619                              le16_to_cpu(dev->descriptor.idProduct));
1620
1621         net = alloc_irdadev(sizeof(*self));
1622         if (!net)
1623                 goto err_out;
1624
1625         SET_NETDEV_DEV(net, &intf->dev);
1626         self = netdev_priv(net);
1627         self->netdev = net;
1628         spin_lock_init(&self->lock);
1629         init_timer(&self->rx_defer_timer);
1630
1631         self->capability = id->driver_info;
1632         self->needspatch = ((self->capability & IUC_STIR421X) != 0);
1633
1634         /* Create all of the needed urbs */
1635         if (self->capability & IUC_STIR421X) {
1636                 self->max_rx_urb = IU_SIGMATEL_MAX_RX_URBS;
1637                 self->header_length = USB_IRDA_STIR421X_HEADER;
1638         } else {
1639                 self->max_rx_urb = IU_MAX_RX_URBS;
1640                 self->header_length = USB_IRDA_HEADER;
1641         }
1642
1643         self->rx_urb = kcalloc(self->max_rx_urb, sizeof(struct urb *),
1644                                 GFP_KERNEL);
1645         if (!self->rx_urb)
1646                 goto err_free_net;
1647
1648         for (i = 0; i < self->max_rx_urb; i++) {
1649                 self->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
1650                 if (!self->rx_urb[i]) {
1651                         goto err_out_1;
1652                 }
1653         }
1654         self->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1655         if (!self->tx_urb) {
1656                 goto err_out_1;
1657         }
1658         self->speed_urb = usb_alloc_urb(0, GFP_KERNEL);
1659         if (!self->speed_urb) {
1660                 goto err_out_2;
1661         }
1662
1663         /* Is this really necessary? (no, except maybe for broken devices) */
1664         if (usb_reset_configuration (dev) < 0) {
1665                 dev_err(&intf->dev, "reset_configuration failed\n");
1666                 ret = -EIO;
1667                 goto err_out_3;
1668         }
1669
1670         /* Is this really necessary? */
1671         /* Note : some driver do hardcode the interface number, some others
1672          * specify an alternate, but very few driver do like this.
1673          * Jean II */
1674         ret = usb_set_interface(dev, intf->altsetting->desc.bInterfaceNumber, 0);
1675         pr_debug("usb-irda: set interface %d result %d\n",
1676                  intf->altsetting->desc.bInterfaceNumber, ret);
1677         switch (ret) {
1678                 case 0:
1679                         break;
1680                 case -EPIPE:            /* -EPIPE = -32 */
1681                         /* Martin Diehl says if we get a -EPIPE we should
1682                          * be fine and we don't need to do a usb_clear_halt().
1683                          * - Jean II */
1684                         pr_debug("%s(), Received -EPIPE, ignoring...\n",
1685                                  __func__);
1686                         break;
1687                 default:
1688                         pr_debug("%s(), Unknown error %d\n", __func__, ret);
1689                         ret = -EIO;
1690                         goto err_out_3;
1691         }
1692
1693         /* Find our endpoints */
1694         interface = intf->cur_altsetting;
1695         if(!irda_usb_parse_endpoints(self, interface->endpoint,
1696                                      interface->desc.bNumEndpoints)) {
1697                 net_err_ratelimited("%s(), Bogus endpoints...\n", __func__);
1698                 ret = -EIO;
1699                 goto err_out_3;
1700         }
1701
1702         self->usbdev = dev;
1703
1704         /* Find IrDA class descriptor */
1705         irda_desc = irda_usb_find_class_desc(intf);
1706         ret = -ENODEV;
1707         if (!irda_desc)
1708                 goto err_out_3;
1709
1710         if (self->needspatch) {
1711                 ret = usb_control_msg (self->usbdev, usb_sndctrlpipe (self->usbdev, 0),
1712                                        0x02, 0x40, 0, 0, NULL, 0, 500);
1713                 if (ret < 0) {
1714                         pr_debug("usb_control_msg failed %d\n", ret);
1715                         goto err_out_3;
1716                 } else {
1717                         mdelay(10);
1718                 }
1719         }
1720
1721         self->irda_desc =  irda_desc;
1722         self->present = 1;
1723         self->netopen = 0;
1724         self->usbintf = intf;
1725
1726         /* Allocate the buffer for speed changes */
1727         /* Don't change this buffer size and allocation without doing
1728          * some heavy and complete testing. Don't ask why :-(
1729          * Jean II */
1730         self->speed_buff = kzalloc(IRDA_USB_SPEED_MTU, GFP_KERNEL);
1731         if (!self->speed_buff)
1732                 goto err_out_3;
1733
1734         self->tx_buff = kzalloc(IRDA_SKB_MAX_MTU + self->header_length,
1735                                 GFP_KERNEL);
1736         if (!self->tx_buff)
1737                 goto err_out_4;
1738
1739         ret = irda_usb_open(self);
1740         if (ret)
1741                 goto err_out_5;
1742
1743         net_info_ratelimited("IrDA: Registered device %s\n", net->name);
1744         usb_set_intfdata(intf, self);
1745
1746         if (self->needspatch) {
1747                 /* Now we fetch and upload the firmware patch */
1748                 ret = stir421x_patch_device(self);
1749                 self->needspatch = (ret < 0);
1750                 if (self->needspatch) {
1751                         net_err_ratelimited("STIR421X: Couldn't upload patch\n");
1752                         goto err_out_6;
1753                 }
1754
1755                 /* replace IrDA class descriptor with what patched device is now reporting */
1756                 irda_desc = irda_usb_find_class_desc (self->usbintf);
1757                 if (!irda_desc) {
1758                         ret = -ENODEV;
1759                         goto err_out_6;
1760                 }
1761                 kfree(self->irda_desc);
1762                 self->irda_desc = irda_desc;
1763                 irda_usb_init_qos(self);
1764         }
1765
1766         return 0;
1767 err_out_6:
1768         unregister_netdev(self->netdev);
1769 err_out_5:
1770         kfree(self->tx_buff);
1771 err_out_4:
1772         kfree(self->speed_buff);
1773 err_out_3:
1774         /* Free all urbs that we may have created */
1775         usb_free_urb(self->speed_urb);
1776 err_out_2:
1777         usb_free_urb(self->tx_urb);
1778 err_out_1:
1779         for (i = 0; i < self->max_rx_urb; i++)
1780                 usb_free_urb(self->rx_urb[i]);
1781         kfree(self->rx_urb);
1782 err_free_net:
1783         free_netdev(net);
1784 err_out:
1785         return ret;
1786 }
1787
1788 /*------------------------------------------------------------------*/
1789 /*
1790  * The current irda-usb device is removed, the USB layer tell us
1791  * to shut it down...
1792  * One of the constraints is that when we exit this function,
1793  * we cannot use the usb_device no more. Gone. Destroyed. kfree().
1794  * Most other subsystem allow you to destroy the instance at a time
1795  * when it's convenient to you, to postpone it to a later date, but
1796  * not the USB subsystem.
1797  * So, we must make bloody sure that everything gets deactivated.
1798  * Jean II
1799  */
1800 static void irda_usb_disconnect(struct usb_interface *intf)
1801 {
1802         unsigned long flags;
1803         struct irda_usb_cb *self = usb_get_intfdata(intf);
1804         int i;
1805
1806         usb_set_intfdata(intf, NULL);
1807         if (!self)
1808                 return;
1809
1810         /* Make sure that the Tx path is not executing. - Jean II */
1811         spin_lock_irqsave(&self->lock, flags);
1812
1813         /* Oups ! We are not there any more.
1814          * This will stop/desactivate the Tx path. - Jean II */
1815         self->present = 0;
1816
1817         /* Kill defered Rx URB */
1818         del_timer(&self->rx_defer_timer);
1819
1820         /* We need to have irq enabled to unlink the URBs. That's OK,
1821          * at this point the Tx path is gone - Jean II */
1822         spin_unlock_irqrestore(&self->lock, flags);
1823
1824         /* Hum... Check if networking is still active (avoid races) */
1825         if((self->netopen) || (self->irlap)) {
1826                 /* Accept no more transmissions */
1827                 /*netif_device_detach(self->netdev);*/
1828                 netif_stop_queue(self->netdev);
1829                 /* Stop all the receive URBs. Must be synchronous. */
1830                 for (i = 0; i < self->max_rx_urb; i++)
1831                         usb_kill_urb(self->rx_urb[i]);
1832                 /* Cancel Tx and speed URB.
1833                  * Make sure it's synchronous to avoid races. */
1834                 usb_kill_urb(self->tx_urb);
1835                 usb_kill_urb(self->speed_urb);
1836         }
1837
1838         /* Cleanup the device stuff */
1839         irda_usb_close(self);
1840         /* No longer attached to USB bus */
1841         self->usbdev = NULL;
1842         self->usbintf = NULL;
1843
1844         /* Clean up our urbs */
1845         for (i = 0; i < self->max_rx_urb; i++)
1846                 usb_free_urb(self->rx_urb[i]);
1847         kfree(self->rx_urb);
1848         /* Clean up Tx and speed URB */
1849         usb_free_urb(self->tx_urb);
1850         usb_free_urb(self->speed_urb);
1851
1852         /* Free self and network device */
1853         free_netdev(self->netdev);
1854         pr_debug("%s(), USB IrDA Disconnected\n", __func__);
1855 }
1856
1857 #ifdef CONFIG_PM
1858 /* USB suspend, so power off the transmitter/receiver */
1859 static int irda_usb_suspend(struct usb_interface *intf, pm_message_t message)
1860 {
1861         struct irda_usb_cb *self = usb_get_intfdata(intf);
1862         int i;
1863
1864         netif_device_detach(self->netdev);
1865
1866         if (self->tx_urb != NULL)
1867                 usb_kill_urb(self->tx_urb);
1868         if (self->speed_urb != NULL)
1869                 usb_kill_urb(self->speed_urb);
1870         for (i = 0; i < self->max_rx_urb; i++) {
1871                 if (self->rx_urb[i] != NULL)
1872                         usb_kill_urb(self->rx_urb[i]);
1873         }
1874         return 0;
1875 }
1876
1877 /* Coming out of suspend, so reset hardware */
1878 static int irda_usb_resume(struct usb_interface *intf)
1879 {
1880         struct irda_usb_cb *self = usb_get_intfdata(intf);
1881         int i;
1882
1883         for (i = 0; i < self->max_rx_urb; i++) {
1884                 if (self->rx_urb[i] != NULL)
1885                         usb_submit_urb(self->rx_urb[i], GFP_KERNEL);
1886         }
1887
1888         netif_device_attach(self->netdev);
1889         return 0;
1890 }
1891 #endif
1892
1893 /*------------------------------------------------------------------*/
1894 /*
1895  * USB device callbacks
1896  */
1897 static struct usb_driver irda_driver = {
1898         .name           = "irda-usb",
1899         .probe          = irda_usb_probe,
1900         .disconnect     = irda_usb_disconnect,
1901         .id_table       = dongles,
1902 #ifdef CONFIG_PM
1903         .suspend        = irda_usb_suspend,
1904         .resume         = irda_usb_resume,
1905 #endif
1906 };
1907
1908 module_usb_driver(irda_driver);
1909
1910 /*
1911  * Module parameters
1912  */
1913 module_param(qos_mtt_bits, int, 0);
1914 MODULE_PARM_DESC(qos_mtt_bits, "Minimum Turn Time");
1915 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>");
1916 MODULE_DESCRIPTION("IrDA-USB Dongle Driver");
1917 MODULE_LICENSE("GPL");