Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 1911 insertions, 0 deletions

diff --git a/kernel/drivers/net/irda/irda-usb.c b/kernel/drivers/net/irda/irda-usb.c
new file mode 100644
index 000000000..f6c916312
--- /dev/null
+++ b/kernel/drivers/net/irda/irda-usb.c
@@ -0,0 +1,1911 @@
+/*****************************************************************************
+ *
+ * Filename:      irda-usb.c
+ * Version:       0.10
+ * Description:   IrDA-USB Driver
+ * Status:        Experimental 
+ * Author:        Dag Brattli <dag@brattli.net>
+ *
+ *	Copyright (C) 2000, Roman Weissgaerber <weissg@vienna.at>
+ *      Copyright (C) 2001, Dag Brattli <dag@brattli.net>
+ *      Copyright (C) 2001, Jean Tourrilhes <jt@hpl.hp.com>
+ *      Copyright (C) 2004, SigmaTel, Inc. <irquality@sigmatel.com>
+ *      Copyright (C) 2005, Milan Beno <beno@pobox.sk>
+ *      Copyright (C) 2006, Nick Fedchik <nick@fedchik.org.ua>
+ *          
+ *	This program is free software; you can redistribute it and/or modify
+ *	it under the terms of the GNU General Public License as published by
+ *	the Free Software Foundation; either version 2 of the License, or
+ *	(at your option) any later version.
+ *
+ *	This program is distributed in the hope that it will be useful,
+ *	but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *	GNU General Public License for more details.
+ *
+ *	You should have received a copy of the GNU General Public License
+ *	along with this program; if not, write to the Free Software
+ *	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *****************************************************************************/
+
+/*
+ *			    IMPORTANT NOTE
+ *			    --------------
+ *
+ * As of kernel 2.5.20, this is the state of compliance and testing of
+ * this driver (irda-usb) with regards to the USB low level drivers...
+ *
+ * This driver has been tested SUCCESSFULLY with the following drivers :
+ *	o usb-uhci-hcd	(For Intel/Via USB controllers)
+ *	o uhci-hcd	(Alternate/JE driver for Intel/Via USB controllers)
+ *	o ohci-hcd	(For other USB controllers)
+ *
+ * This driver has NOT been tested with the following drivers :
+ *	o ehci-hcd	(USB 2.0 controllers)
+ *
+ * Note that all HCD drivers do URB_ZERO_PACKET and timeout properly,
+ * so we don't have to worry about that anymore.
+ * One common problem is the failure to set the address on the dongle,
+ * but this happens before the driver gets loaded...
+ *
+ * Jean II
+ */
+
+/*------------------------------------------------------------------*/
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <linux/slab.h>
+#include <linux/rtnetlink.h>
+#include <linux/usb.h>
+#include <linux/firmware.h>
+
+#include "irda-usb.h"
+
+/*------------------------------------------------------------------*/
+
+static int qos_mtt_bits = 0;
+
+/* These are the currently known IrDA USB dongles. Add new dongles here */
+static struct usb_device_id dongles[] = {
+	/* ACTiSYS Corp.,  ACT-IR2000U FIR-USB Adapter */
+	{ USB_DEVICE(0x9c4, 0x011), .driver_info = IUC_SPEED_BUG | IUC_NO_WINDOW },
+	/* Look like ACTiSYS, Report : IBM Corp., IBM UltraPort IrDA */
+	{ USB_DEVICE(0x4428, 0x012), .driver_info = IUC_SPEED_BUG | IUC_NO_WINDOW },
+	/* KC Technology Inc.,  KC-180 USB IrDA Device */
+	{ USB_DEVICE(0x50f, 0x180), .driver_info = IUC_SPEED_BUG | IUC_NO_WINDOW },
+	/* Extended Systems, Inc.,  XTNDAccess IrDA USB (ESI-9685) */
+	{ USB_DEVICE(0x8e9, 0x100), .driver_info = IUC_SPEED_BUG | IUC_NO_WINDOW },
+	/* SigmaTel STIR4210/4220/4116 USB IrDA (VFIR) Bridge */
+	{ USB_DEVICE(0x66f, 0x4210), .driver_info = IUC_STIR421X | IUC_SPEED_BUG },
+	{ USB_DEVICE(0x66f, 0x4220), .driver_info = IUC_STIR421X | IUC_SPEED_BUG },
+	{ USB_DEVICE(0x66f, 0x4116), .driver_info = IUC_STIR421X | IUC_SPEED_BUG },
+	{ .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS |
+	  USB_DEVICE_ID_MATCH_INT_SUBCLASS,
+	  .bInterfaceClass = USB_CLASS_APP_SPEC,
+	  .bInterfaceSubClass = USB_CLASS_IRDA,
+	  .driver_info = IUC_DEFAULT, },
+	{ }, /* The end */
+};
+
+/*
+ * Important note :
+ * Devices based on the SigmaTel chipset (0x66f, 0x4200) are not designed
+ * using the "USB-IrDA specification" (yes, there exist such a thing), and
+ * therefore not supported by this driver (don't add them above).
+ * There is a Linux driver, stir4200, that support those USB devices.
+ * Jean II
+ */
+
+MODULE_DEVICE_TABLE(usb, dongles);
+
+/*------------------------------------------------------------------*/
+
+static void irda_usb_init_qos(struct irda_usb_cb *self) ;
+static struct irda_class_desc *irda_usb_find_class_desc(struct usb_interface *intf);
+static void irda_usb_disconnect(struct usb_interface *intf);
+static void irda_usb_change_speed_xbofs(struct irda_usb_cb *self);
+static netdev_tx_t irda_usb_hard_xmit(struct sk_buff *skb,
+					    struct net_device *dev);
+static int irda_usb_open(struct irda_usb_cb *self);
+static void irda_usb_close(struct irda_usb_cb *self);
+static void speed_bulk_callback(struct urb *urb);
+static void write_bulk_callback(struct urb *urb);
+static void irda_usb_receive(struct urb *urb);
+static void irda_usb_rx_defer_expired(unsigned long data);
+static int irda_usb_net_open(struct net_device *dev);
+static int irda_usb_net_close(struct net_device *dev);
+static int irda_usb_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
+static void irda_usb_net_timeout(struct net_device *dev);
+
+/************************ TRANSMIT ROUTINES ************************/
+/*
+ * Receive packets from the IrDA stack and send them on the USB pipe.
+ * Handle speed change, timeout and lot's of ugliness...
+ */
+
+/*------------------------------------------------------------------*/
+/*
+ * Function irda_usb_build_header(self, skb, header)
+ *
+ *   Builds USB-IrDA outbound header
+ *
+ * When we send an IrDA frame over an USB pipe, we add to it a 1 byte
+ * header. This function create this header with the proper values.
+ *
+ * Important note : the USB-IrDA spec 1.0 say very clearly in chapter 5.4.2.2
+ * that the setting of the link speed and xbof number in this outbound header
+ * should be applied *AFTER* the frame has been sent.
+ * Unfortunately, some devices are not compliant with that... It seems that
+ * reading the spec is far too difficult...
+ * Jean II
+ */
+static void irda_usb_build_header(struct irda_usb_cb *self,
+				  __u8 *header,
+				  int	force)
+{
+	/* Here we check if we have an STIR421x chip,
+	 * and if either speed or xbofs (or both) needs
+	 * to be changed.
+	 */
+	if (self->capability & IUC_STIR421X &&
+	    ((self->new_speed != -1) || (self->new_xbofs != -1))) {
+
+		/* With STIR421x, speed and xBOFs must be set at the same
+		 * time, even if only one of them changes.
+		 */
+		if (self->new_speed == -1)
+			self->new_speed = self->speed ;
+
+		if (self->new_xbofs == -1)
+			self->new_xbofs = self->xbofs ;
+	}
+
+	/* Set the link speed */
+	if (self->new_speed != -1) {
+		/* Hum... Ugly hack :-(
+		 * Some device are not compliant with the spec and change
+		 * parameters *before* sending the frame. - Jean II
+		 */
+		if ((self->capability & IUC_SPEED_BUG) &&
+		    (!force) && (self->speed != -1)) {
+			/* No speed and xbofs change here
+			 * (we'll do it later in the write callback) */
+			pr_debug("%s(), not changing speed yet\n", __func__);
+			*header = 0;
+			return;
+		}
+
+		pr_debug("%s(), changing speed to %d\n",
+			 __func__, self->new_speed);
+		self->speed = self->new_speed;
+		/* We will do ` self->new_speed = -1; ' in the completion
+		 * handler just in case the current URB fail - Jean II */
+
+		switch (self->speed) {
+		case 2400:
+		        *header = SPEED_2400;
+			break;
+		default:
+		case 9600:
+			*header = SPEED_9600;
+			break;
+		case 19200:
+			*header = SPEED_19200;
+			break;
+		case 38400:
+			*header = SPEED_38400;
+			break;
+		case 57600:
+		        *header = SPEED_57600;
+			break;
+		case 115200:
+		        *header = SPEED_115200;
+			break;
+		case 576000:
+		        *header = SPEED_576000;
+			break;
+		case 1152000:
+		        *header = SPEED_1152000;
+			break;
+		case 4000000:
+		        *header = SPEED_4000000;
+			self->new_xbofs = 0;
+			break;
+		case 16000000:
+			*header = SPEED_16000000;
+  			self->new_xbofs = 0;
+  			break;
+  		}
+	} else
+		/* No change */
+		*header = 0;
+	
+	/* Set the negotiated additional XBOFS */
+	if (self->new_xbofs != -1) {
+		pr_debug("%s(), changing xbofs to %d\n",
+			 __func__, self->new_xbofs);
+		self->xbofs = self->new_xbofs;
+		/* We will do ` self->new_xbofs = -1; ' in the completion
+		 * handler just in case the current URB fail - Jean II */
+
+		switch (self->xbofs) {
+		case 48:
+			*header |= 0x10;
+			break;
+		case 28:
+		case 24:	/* USB spec 1.0 says 24 */
+			*header |= 0x20;
+			break;
+		default:
+		case 12:
+			*header |= 0x30;
+			break;
+		case 5: /* Bug in IrLAP spec? (should be 6) */
+		case 6:
+			*header |= 0x40;
+			break;
+		case 3:
+			*header |= 0x50;
+			break;
+		case 2:
+			*header |= 0x60;
+			break;
+		case 1:
+			*header |= 0x70;
+			break;
+		case 0:
+			*header |= 0x80;
+			break;
+		}
+	}
+}
+
+/*
+*   calculate turnaround time for SigmaTel header
+*/
+static __u8 get_turnaround_time(struct sk_buff *skb)
+{
+	int turnaround_time = irda_get_mtt(skb);
+
+	if ( turnaround_time == 0 )
+		return 0;
+	else if ( turnaround_time <= 10 )
+		return 1;
+	else if ( turnaround_time <= 50 )
+		return 2;
+	else if ( turnaround_time <= 100 )
+		return 3;
+	else if ( turnaround_time <= 500 )
+		return 4;
+	else if ( turnaround_time <= 1000 )
+		return 5;
+	else if ( turnaround_time <= 5000 )
+		return 6;
+	else
+		return 7;
+}
+
+
+/*------------------------------------------------------------------*/
+/*
+ * Send a command to change the speed of the dongle
+ * Need to be called with spinlock on.
+ */
+static void irda_usb_change_speed_xbofs(struct irda_usb_cb *self)
+{
+	__u8 *frame;
+	struct urb *urb;
+	int ret;
+
+	pr_debug("%s(), speed=%d, xbofs=%d\n", __func__,
+		 self->new_speed, self->new_xbofs);
+
+	/* Grab the speed URB */
+	urb = self->speed_urb;
+	if (urb->status != 0) {
+		net_warn_ratelimited("%s(), URB still in use!\n", __func__);
+		return;
+	}
+
+	/* Allocate the fake frame */
+	frame = self->speed_buff;
+
+	/* Set the new speed and xbofs in this fake frame */
+	irda_usb_build_header(self, frame, 1);
+
+	if (self->capability & IUC_STIR421X) {
+		if (frame[0] == 0) return ; // do nothing if no change
+		frame[1] = 0; // other parameters don't change here
+		frame[2] = 0;
+	}
+
+	/* Submit the 0 length IrDA frame to trigger new speed settings */
+        usb_fill_bulk_urb(urb, self->usbdev,
+		      usb_sndbulkpipe(self->usbdev, self->bulk_out_ep),
+                      frame, IRDA_USB_SPEED_MTU,
+                      speed_bulk_callback, self);
+	urb->transfer_buffer_length = self->header_length;
+	urb->transfer_flags = 0;
+
+	/* Irq disabled -> GFP_ATOMIC */
+	if ((ret = usb_submit_urb(urb, GFP_ATOMIC))) {
+		net_warn_ratelimited("%s(), failed Speed URB\n", __func__);
+	}
+}
+
+/*------------------------------------------------------------------*/
+/*
+ * Speed URB callback
+ * Now, we can only get called for the speed URB.
+ */
+static void speed_bulk_callback(struct urb *urb)
+{
+	struct irda_usb_cb *self = urb->context;
+	
+	/* We should always have a context */
+	IRDA_ASSERT(self != NULL, return;);
+	/* We should always be called for the speed URB */
+	IRDA_ASSERT(urb == self->speed_urb, return;);
+
+	/* Check for timeout and other USB nasties */
+	if (urb->status != 0) {
+		/* I get a lot of -ECONNABORTED = -103 here - Jean II */
+		pr_debug("%s(), URB complete status %d, transfer_flags 0x%04X\n",
+			 __func__, urb->status, urb->transfer_flags);
+
+		/* Don't do anything here, that might confuse the USB layer.
+		 * Instead, we will wait for irda_usb_net_timeout(), the
+		 * network layer watchdog, to fix the situation.
+		 * Jean II */
+		/* A reset of the dongle might be welcomed here - Jean II */
+		return;
+	}
+
+	/* urb is now available */
+	//urb->status = 0; -> tested above
+
+	/* New speed and xbof is now committed in hardware */
+	self->new_speed = -1;
+	self->new_xbofs = -1;
+
+	/* Allow the stack to send more packets */
+	netif_wake_queue(self->netdev);
+}
+
+/*------------------------------------------------------------------*/
+/*
+ * Send an IrDA frame to the USB dongle (for transmission)
+ */
+static netdev_tx_t irda_usb_hard_xmit(struct sk_buff *skb,
+					    struct net_device *netdev)
+{
+	struct irda_usb_cb *self = netdev_priv(netdev);
+	struct urb *urb = self->tx_urb;
+	unsigned long flags;
+	s32 speed;
+	s16 xbofs;
+	int res, mtt;
+
+	pr_debug("%s() on %s\n", __func__, netdev->name);
+
+	netif_stop_queue(netdev);
+
+	/* Protect us from USB callbacks, net watchdog and else. */
+	spin_lock_irqsave(&self->lock, flags);
+
+	/* Check if the device is still there.
+	 * We need to check self->present under the spinlock because
+	 * of irda_usb_disconnect() is synchronous - Jean II */
+	if (!self->present) {
+		pr_debug("%s(), Device is gone...\n", __func__);
+		goto drop;
+	}
+
+	/* Check if we need to change the number of xbofs */
+        xbofs = irda_get_next_xbofs(skb);
+        if ((xbofs != self->xbofs) && (xbofs != -1)) {
+		self->new_xbofs = xbofs;
+	}
+
+        /* Check if we need to change the speed */
+	speed = irda_get_next_speed(skb);
+	if ((speed != self->speed) && (speed != -1)) {
+		/* Set the desired speed */
+		self->new_speed = speed;
+
+		/* Check for empty frame */
+		if (!skb->len) {
+			/* IrLAP send us an empty frame to make us change the
+			 * speed. Changing speed with the USB adapter is in
+			 * fact sending an empty frame to the adapter, so we
+			 * could just let the present function do its job.
+			 * However, we would wait for min turn time,
+			 * do an extra memcpy and increment packet counters...
+			 * Jean II */
+			irda_usb_change_speed_xbofs(self);
+			netdev->trans_start = jiffies;
+			/* Will netif_wake_queue() in callback */
+			goto drop;
+		}
+	}
+
+	if (urb->status != 0) {
+		net_warn_ratelimited("%s(), URB still in use!\n", __func__);
+		goto drop;
+	}
+
+	skb_copy_from_linear_data(skb, self->tx_buff + self->header_length, skb->len);
+
+	/* Change setting for next frame */
+	if (self->capability & IUC_STIR421X) {
+		__u8 turnaround_time;
+		__u8* frame = self->tx_buff;
+		turnaround_time = get_turnaround_time( skb );
+		irda_usb_build_header(self, frame, 0);
+		frame[2] = turnaround_time;
+		if ((skb->len != 0) &&
+		    ((skb->len % 128) == 0) &&
+		    ((skb->len % 512) != 0)) {
+			/* add extra byte for special SigmaTel feature */
+			frame[1] = 1;
+			skb_put(skb, 1);
+		} else {
+			frame[1] = 0;
+		}
+	} else {
+		irda_usb_build_header(self, self->tx_buff, 0);
+	}
+
+	/* FIXME: Make macro out of this one */
+	((struct irda_skb_cb *)skb->cb)->context = self;
+
+	usb_fill_bulk_urb(urb, self->usbdev,
+		      usb_sndbulkpipe(self->usbdev, self->bulk_out_ep),
+                      self->tx_buff, skb->len + self->header_length,
+                      write_bulk_callback, skb);
+
+	/* This flag (URB_ZERO_PACKET) indicates that what we send is not
+	 * a continuous stream of data but separate packets.
+	 * In this case, the USB layer will insert an empty USB frame (TD)
+	 * after each of our packets that is exact multiple of the frame size.
+	 * This is how the dongle will detect the end of packet - Jean II */
+	urb->transfer_flags = URB_ZERO_PACKET;
+
+	/* Generate min turn time. FIXME: can we do better than this? */
+	/* Trying to a turnaround time at this level is trying to measure
+	 * processor clock cycle with a wrist-watch, approximate at best...
+	 *
+	 * What we know is the last time we received a frame over USB.
+	 * Due to latency over USB that depend on the USB load, we don't
+	 * know when this frame was received over IrDA (a few ms before ?)
+	 * Then, same story for our outgoing frame...
+	 *
+	 * In theory, the USB dongle is supposed to handle the turnaround
+	 * by itself (spec 1.0, chater 4, page 6). Who knows ??? That's
+	 * why this code is enabled only for dongles that doesn't meet
+	 * the spec.
+	 * Jean II */
+	if (self->capability & IUC_NO_TURN) {
+		mtt = irda_get_mtt(skb);
+		if (mtt) {
+			int diff;
+			diff = ktime_us_delta(ktime_get(), self->stamp);
+#ifdef IU_USB_MIN_RTT
+			/* Factor in USB delays -> Get rid of udelay() that
+			 * would be lost in the noise - Jean II */
+			diff += IU_USB_MIN_RTT;
+#endif /* IU_USB_MIN_RTT */
+
+		        /* Check if the mtt is larger than the time we have
+			 * already used by all the protocol processing
+			 */
+			if (mtt > diff) {
+				mtt -= diff;
+				if (mtt > 1000)
+					mdelay(mtt/1000);
+				else
+					udelay(mtt);
+			}
+		}
+	}
+	
+	/* Ask USB to send the packet - Irq disabled -> GFP_ATOMIC */
+	if ((res = usb_submit_urb(urb, GFP_ATOMIC))) {
+		net_warn_ratelimited("%s(), failed Tx URB\n", __func__);
+		netdev->stats.tx_errors++;
+		/* Let USB recover : We will catch that in the watchdog */
+		/*netif_start_queue(netdev);*/
+	} else {
+		/* Increment packet stats */
+		netdev->stats.tx_packets++;
+                netdev->stats.tx_bytes += skb->len;
+		
+		netdev->trans_start = jiffies;
+	}
+	spin_unlock_irqrestore(&self->lock, flags);
+	
+	return NETDEV_TX_OK;
+
+drop:
+	/* Drop silently the skb and exit */
+	dev_kfree_skb(skb);
+	spin_unlock_irqrestore(&self->lock, flags);
+	return NETDEV_TX_OK;
+}
+
+/*------------------------------------------------------------------*/
+/*
+ * Note : this function will be called only for tx_urb...
+ */
+static void write_bulk_callback(struct urb *urb)
+{
+	unsigned long flags;
+	struct sk_buff *skb = urb->context;
+	struct irda_usb_cb *self = ((struct irda_skb_cb *) skb->cb)->context;
+	
+	/* We should always have a context */
+	IRDA_ASSERT(self != NULL, return;);
+	/* We should always be called for the speed URB */
+	IRDA_ASSERT(urb == self->tx_urb, return;);
+
+	/* Free up the skb */
+	dev_kfree_skb_any(skb);
+	urb->context = NULL;
+
+	/* Check for timeout and other USB nasties */
+	if (urb->status != 0) {
+		/* I get a lot of -ECONNABORTED = -103 here - Jean II */
+		pr_debug("%s(), URB complete status %d, transfer_flags 0x%04X\n",
+			 __func__, urb->status, urb->transfer_flags);
+
+		/* Don't do anything here, that might confuse the USB layer,
+		 * and we could go in recursion and blow the kernel stack...
+		 * Instead, we will wait for irda_usb_net_timeout(), the
+		 * network layer watchdog, to fix the situation.
+		 * Jean II */
+		/* A reset of the dongle might be welcomed here - Jean II */
+		return;
+	}
+
+	/* urb is now available */
+	//urb->status = 0; -> tested above
+
+	/* Make sure we read self->present properly */
+	spin_lock_irqsave(&self->lock, flags);
+
+	/* If the network is closed, stop everything */
+	if ((!self->netopen) || (!self->present)) {
+		pr_debug("%s(), Network is gone...\n", __func__);
+		spin_unlock_irqrestore(&self->lock, flags);
+		return;
+	}
+
+	/* If changes to speed or xbofs is pending... */
+	if ((self->new_speed != -1) || (self->new_xbofs != -1)) {
+		if ((self->new_speed != self->speed) ||
+		    (self->new_xbofs != self->xbofs)) {
+			/* We haven't changed speed yet (because of
+			 * IUC_SPEED_BUG), so do it now - Jean II */
+			pr_debug("%s(), Changing speed now...\n", __func__);
+			irda_usb_change_speed_xbofs(self);
+		} else {
+			/* New speed and xbof is now committed in hardware */
+			self->new_speed = -1;
+			self->new_xbofs = -1;
+			/* Done, waiting for next packet */
+			netif_wake_queue(self->netdev);
+		}
+	} else {
+		/* Otherwise, allow the stack to send more packets */
+		netif_wake_queue(self->netdev);
+	}
+	spin_unlock_irqrestore(&self->lock, flags);
+}
+
+/*------------------------------------------------------------------*/
+/*
+ * Watchdog timer from the network layer.
+ * After a predetermined timeout, if we don't give confirmation that
+ * the packet has been sent (i.e. no call to netif_wake_queue()),
+ * the network layer will call this function.
+ * Note that URB that we submit have also a timeout. When the URB timeout
+ * expire, the normal URB callback is called (write_bulk_callback()).
+ */
+static void irda_usb_net_timeout(struct net_device *netdev)
+{
+	unsigned long flags;
+	struct irda_usb_cb *self = netdev_priv(netdev);
+	struct urb *urb;
+	int	done = 0;	/* If we have made any progress */
+
+	pr_debug("%s(), Network layer thinks we timed out!\n", __func__);
+	IRDA_ASSERT(self != NULL, return;);
+
+	/* Protect us from USB callbacks, net Tx and else. */
+	spin_lock_irqsave(&self->lock, flags);
+
+	/* self->present *MUST* be read under spinlock */
+	if (!self->present) {
+		net_warn_ratelimited("%s(), device not present!\n", __func__);
+		netif_stop_queue(netdev);
+		spin_unlock_irqrestore(&self->lock, flags);
+		return;
+	}
+
+	/* Check speed URB */
+	urb = self->speed_urb;
+	if (urb->status != 0) {
+		pr_debug("%s: Speed change timed out, urb->status=%d, urb->transfer_flags=0x%04X\n",
+			 netdev->name, urb->status, urb->transfer_flags);
+
+		switch (urb->status) {
+		case -EINPROGRESS:
+			usb_unlink_urb(urb);
+			/* Note : above will  *NOT* call netif_wake_queue()
+			 * in completion handler, we will come back here.
+			 * Jean II */
+			done = 1;
+			break;
+		case -ECONNRESET:
+		case -ENOENT:			/* urb unlinked by us */
+		default:			/* ??? - Play safe */
+			urb->status = 0;
+			netif_wake_queue(self->netdev);
+			done = 1;
+			break;
+		}
+	}
+
+	/* Check Tx URB */
+	urb = self->tx_urb;
+	if (urb->status != 0) {
+		struct sk_buff *skb = urb->context;
+
+		pr_debug("%s: Tx timed out, urb->status=%d, urb->transfer_flags=0x%04X\n",
+			 netdev->name, urb->status, urb->transfer_flags);
+
+		/* Increase error count */
+		netdev->stats.tx_errors++;
+
+#ifdef IU_BUG_KICK_TIMEOUT
+		/* Can't be a bad idea to reset the speed ;-) - Jean II */
+		if(self->new_speed == -1)
+			self->new_speed = self->speed;
+		if(self->new_xbofs == -1)
+			self->new_xbofs = self->xbofs;
+		irda_usb_change_speed_xbofs(self);
+#endif /* IU_BUG_KICK_TIMEOUT */
+
+		switch (urb->status) {
+		case -EINPROGRESS:
+			usb_unlink_urb(urb);
+			/* Note : above will  *NOT* call netif_wake_queue()
+			 * in completion handler, because urb->status will
+			 * be -ENOENT. We will fix that at the next watchdog,
+			 * leaving more time to USB to recover...
+			 * Jean II */
+			done = 1;
+			break;
+		case -ECONNRESET:
+		case -ENOENT:			/* urb unlinked by us */
+		default:			/* ??? - Play safe */
+			if(skb != NULL) {
+				dev_kfree_skb_any(skb);
+				urb->context = NULL;
+			}
+			urb->status = 0;
+			netif_wake_queue(self->netdev);
+			done = 1;
+			break;
+		}
+	}
+	spin_unlock_irqrestore(&self->lock, flags);
+
+	/* Maybe we need a reset */
+	/* Note : Some drivers seem to use a usb_set_interface() when they
+	 * need to reset the hardware. Hum...
+	 */
+
+	/* if(done == 0) */
+}
+
+/************************* RECEIVE ROUTINES *************************/
+/*
+ * Receive packets from the USB layer stack and pass them to the IrDA stack.
+ * Try to work around USB failures...
+ */
+
+/*
+ * Note :
+ * Some of you may have noticed that most dongle have an interrupt in pipe
+ * that we don't use. Here is the little secret...
+ * When we hang a Rx URB on the bulk in pipe, it generates some USB traffic
+ * in every USB frame. This is unnecessary overhead.
+ * The interrupt in pipe will generate an event every time a packet is
+ * received. Reading an interrupt pipe adds minimal overhead, but has some
+ * latency (~1ms).
+ * If we are connected (speed != 9600), we want to minimise latency, so
+ * we just always hang the Rx URB and ignore the interrupt.
+ * If we are not connected (speed == 9600), there is usually no Rx traffic,
+ * and we want to minimise the USB overhead. In this case we should wait
+ * on the interrupt pipe and hang the Rx URB only when an interrupt is
+ * received.
+ * Jean II
+ *
+ * Note : don't read the above as what we are currently doing, but as
+ * something we could do with KC dongle. Also don't forget that the
+ * interrupt pipe is not part of the original standard, so this would
+ * need to be optional...
+ * Jean II
+ */
+
+/*------------------------------------------------------------------*/
+/*
+ * Submit a Rx URB to the USB layer to handle reception of a frame
+ * Mostly called by the completion callback of the previous URB.
+ *
+ * Jean II
+ */
+static void irda_usb_submit(struct irda_usb_cb *self, struct sk_buff *skb, struct urb *urb)
+{
+	struct irda_skb_cb *cb;
+	int ret;
+
+	/* This should never happen */
+	IRDA_ASSERT(skb != NULL, return;);
+	IRDA_ASSERT(urb != NULL, return;);
+
+	/* Save ourselves in the skb */
+	cb = (struct irda_skb_cb *) skb->cb;
+	cb->context = self;
+
+	/* Reinitialize URB */
+	usb_fill_bulk_urb(urb, self->usbdev, 
+		      usb_rcvbulkpipe(self->usbdev, self->bulk_in_ep), 
+		      skb->data, IRDA_SKB_MAX_MTU,
+                      irda_usb_receive, skb);
+	urb->status = 0;
+
+	/* Can be called from irda_usb_receive (irq handler) -> GFP_ATOMIC */
+	ret = usb_submit_urb(urb, GFP_ATOMIC);
+	if (ret) {
+		/* If this ever happen, we are in deep s***.
+		 * Basically, the Rx path will stop... */
+		net_warn_ratelimited("%s(), Failed to submit Rx URB %d\n",
+				     __func__, ret);
+	}
+}
+
+/*------------------------------------------------------------------*/
+/*
+ * Function irda_usb_receive(urb)
+ *
+ *     Called by the USB subsystem when a frame has been received
+ *
+ */
+static void irda_usb_receive(struct urb *urb)
+{
+	struct sk_buff *skb = (struct sk_buff *) urb->context;
+	struct irda_usb_cb *self; 
+	struct irda_skb_cb *cb;
+	struct sk_buff *newskb;
+	struct sk_buff *dataskb;
+	struct urb *next_urb;
+	unsigned int len, docopy;
+
+	pr_debug("%s(), len=%d\n", __func__, urb->actual_length);
+	
+	/* Find ourselves */
+	cb = (struct irda_skb_cb *) skb->cb;
+	IRDA_ASSERT(cb != NULL, return;);
+	self = (struct irda_usb_cb *) cb->context;
+	IRDA_ASSERT(self != NULL, return;);
+
+	/* If the network is closed or the device gone, stop everything */
+	if ((!self->netopen) || (!self->present)) {
+		pr_debug("%s(), Network is gone!\n", __func__);
+		/* Don't re-submit the URB : will stall the Rx path */
+		return;
+	}
+	
+	/* Check the status */
+	if (urb->status != 0) {
+		switch (urb->status) {
+		case -EILSEQ:
+			self->netdev->stats.rx_crc_errors++;
+			/* Also precursor to a hot-unplug on UHCI. */
+			/* Fallthrough... */
+		case -ECONNRESET:
+			/* Random error, if I remember correctly */
+			/* uhci_cleanup_unlink() is going to kill the Rx
+			 * URB just after we return. No problem, at this
+			 * point the URB will be idle ;-) - Jean II */
+		case -ESHUTDOWN:
+			/* That's usually a hot-unplug. Submit will fail... */
+		case -ETIME:
+			/* Usually precursor to a hot-unplug on OHCI. */
+		default:
+			self->netdev->stats.rx_errors++;
+			pr_debug("%s(), RX status %d, transfer_flags 0x%04X\n",
+				 __func__, urb->status, urb->transfer_flags);
+			break;
+		}
+		/* If we received an error, we don't want to resubmit the
+		 * Rx URB straight away but to give the USB layer a little
+		 * bit of breathing room.
+		 * We are in the USB thread context, therefore there is a
+		 * danger of recursion (new URB we submit fails, we come
+		 * back here).
+		 * With recent USB stack (2.6.15+), I'm seeing that on
+		 * hot unplug of the dongle...
+		 * Lowest effective timer is 10ms...
+		 * Jean II */
+		self->rx_defer_timer.function = irda_usb_rx_defer_expired;
+		self->rx_defer_timer.data = (unsigned long) urb;
+		mod_timer(&self->rx_defer_timer, jiffies + (10 * HZ / 1000));
+		return;
+	}
+	
+	/* Check for empty frames */
+	if (urb->actual_length <= self->header_length) {
+		net_warn_ratelimited("%s(), empty frame!\n", __func__);
+		goto done;
+	}
+
+	/*  
+	 * Remember the time we received this frame, so we can
+	 * reduce the min turn time a bit since we will know
+	 * how much time we have used for protocol processing
+	 */
+	self->stamp = ktime_get();
+
+	/* Check if we need to copy the data to a new skb or not.
+	 * For most frames, we use ZeroCopy and pass the already
+	 * allocated skb up the stack.
+	 * If the frame is small, it is more efficient to copy it
+	 * to save memory (copy will be fast anyway - that's
+	 * called Rx-copy-break). Jean II */
+	docopy = (urb->actual_length < IRDA_RX_COPY_THRESHOLD);
+
+	/* Allocate a new skb */
+	if (self->capability & IUC_STIR421X)
+		newskb = dev_alloc_skb(docopy ? urb->actual_length :
+				       IRDA_SKB_MAX_MTU +
+				       USB_IRDA_STIR421X_HEADER);
+	else
+		newskb = dev_alloc_skb(docopy ? urb->actual_length :
+				       IRDA_SKB_MAX_MTU);
+
+	if (!newskb)  {
+		self->netdev->stats.rx_dropped++;
+		/* We could deliver the current skb, but this would stall
+		 * the Rx path. Better drop the packet... Jean II */
+		goto done;  
+	}
+
+	/* Make sure IP header get aligned (IrDA header is 5 bytes) */
+	/* But IrDA-USB header is 1 byte. Jean II */
+	//skb_reserve(newskb, USB_IRDA_HEADER - 1);
+
+	if(docopy) {
+		/* Copy packet, so we can recycle the original */
+		skb_copy_from_linear_data(skb, newskb->data, urb->actual_length);
+		/* Deliver this new skb */
+		dataskb = newskb;
+		/* And hook the old skb to the URB
+		 * Note : we don't need to "clean up" the old skb,
+		 * as we never touched it. Jean II */
+	} else {
+		/* We are using ZeroCopy. Deliver old skb */
+		dataskb = skb;
+		/* And hook the new skb to the URB */
+		skb = newskb;
+	}
+
+	/* Set proper length on skb & remove USB-IrDA header */
+	skb_put(dataskb, urb->actual_length);
+	skb_pull(dataskb, self->header_length);
+
+	/* Ask the networking layer to queue the packet for the IrDA stack */
+	dataskb->dev = self->netdev;
+	skb_reset_mac_header(dataskb);
+	dataskb->protocol = htons(ETH_P_IRDA);
+	len = dataskb->len;
+	netif_rx(dataskb);
+
+	/* Keep stats up to date */
+	self->netdev->stats.rx_bytes += len;
+	self->netdev->stats.rx_packets++;
+
+done:
+	/* Note : at this point, the URB we've just received (urb)
+	 * is still referenced by the USB layer. For example, if we
+	 * have received a -ECONNRESET, uhci_cleanup_unlink() will
+	 * continue to process it (in fact, cleaning it up).
+	 * If we were to submit this URB, disaster would ensue.
+	 * Therefore, we submit our idle URB, and put this URB in our
+	 * idle slot....
+	 * Jean II */
+	/* Note : with this scheme, we could submit the idle URB before
+	 * processing the Rx URB. I don't think it would buy us anything as
+	 * we are running in the USB thread context. Jean II */
+	next_urb = self->idle_rx_urb;
+
+	/* Recycle Rx URB : Now, the idle URB is the present one */
+	urb->context = NULL;
+	self->idle_rx_urb = urb;
+
+	/* Submit the idle URB to replace the URB we've just received.
+	 * Do it last to avoid race conditions... Jean II */
+	irda_usb_submit(self, skb, next_urb);
+}
+
+/*------------------------------------------------------------------*/
+/*
+ * In case of errors, we want the USB layer to have time to recover.
+ * Now, it is time to resubmit ouur Rx URB...
+ */
+static void irda_usb_rx_defer_expired(unsigned long data)
+{
+	struct urb *urb = (struct urb *) data;
+	struct sk_buff *skb = (struct sk_buff *) urb->context;
+	struct irda_usb_cb *self; 
+	struct irda_skb_cb *cb;
+	struct urb *next_urb;
+
+	/* Find ourselves */
+	cb = (struct irda_skb_cb *) skb->cb;
+	IRDA_ASSERT(cb != NULL, return;);
+	self = (struct irda_usb_cb *) cb->context;
+	IRDA_ASSERT(self != NULL, return;);
+
+	/* Same stuff as when Rx is done, see above... */
+	next_urb = self->idle_rx_urb;
+	urb->context = NULL;
+	self->idle_rx_urb = urb;
+	irda_usb_submit(self, skb, next_urb);
+}
+
+/*------------------------------------------------------------------*/
+/*
+ * Callbak from IrDA layer. IrDA wants to know if we have
+ * started receiving anything.
+ */
+static int irda_usb_is_receiving(struct irda_usb_cb *self)
+{
+	/* Note : because of the way UHCI works, it's almost impossible
+	 * to get this info. The Controller DMA directly to memory and
+	 * signal only when the whole frame is finished. To know if the
+	 * first TD of the URB has been filled or not seems hard work...
+	 *
+	 * The other solution would be to use the "receiving" command
+	 * on the default decriptor with a usb_control_msg(), but that
+	 * would add USB traffic and would return result only in the
+	 * next USB frame (~1ms).
+	 *
+	 * I've been told that current dongles send status info on their
+	 * interrupt endpoint, and that's what the Windows driver uses
+	 * to know this info. Unfortunately, this is not yet in the spec...
+	 *
+	 * Jean II
+	 */
+
+	return 0; /* For now */
+}
+
+#define STIR421X_PATCH_PRODUCT_VER     "Product Version: "
+#define STIR421X_PATCH_STMP_TAG        "STMP"
+#define STIR421X_PATCH_CODE_OFFSET     512 /* patch image starts before here */
+/* marks end of patch file header (PC DOS text file EOF character) */
+#define STIR421X_PATCH_END_OF_HDR_TAG  0x1A
+#define STIR421X_PATCH_BLOCK_SIZE      1023
+
+/*
+ * Function stir421x_fwupload (struct irda_usb_cb *self,
+ *                             unsigned char *patch,
+ *                             const unsigned int patch_len)
+ *
+ *   Upload firmware code to SigmaTel 421X IRDA-USB dongle
+ */
+static int stir421x_fw_upload(struct irda_usb_cb *self,
+			     const unsigned char *patch,
+			     const unsigned int patch_len)
+{
+        int ret = -ENOMEM;
+        int actual_len = 0;
+        unsigned int i;
+        unsigned int block_size = 0;
+        unsigned char *patch_block;
+
+        patch_block = kzalloc(STIR421X_PATCH_BLOCK_SIZE, GFP_KERNEL);
+	if (patch_block == NULL)
+		return -ENOMEM;
+
+	/* break up patch into 1023-byte sections */
+	for (i = 0; i < patch_len; i += block_size) {
+		block_size = patch_len - i;
+
+		if (block_size > STIR421X_PATCH_BLOCK_SIZE)
+			block_size = STIR421X_PATCH_BLOCK_SIZE;
+
+		/* upload the patch section */
+		memcpy(patch_block, patch + i, block_size);
+
+		ret = usb_bulk_msg(self->usbdev,
+				   usb_sndbulkpipe(self->usbdev,
+						   self->bulk_out_ep),
+				   patch_block, block_size,
+				   &actual_len, msecs_to_jiffies(500));
+		pr_debug("%s(): Bulk send %u bytes, ret=%d\n",
+			 __func__, actual_len, ret);
+
+		if (ret < 0)
+			break;
+
+		mdelay(10);
+	}
+
+	kfree(patch_block);
+
+        return ret;
+ }
+
+/*
+ * Function stir421x_patch_device(struct irda_usb_cb *self)
+ *
+ * Get a firmware code from userspase using hotplug request_firmware() call
+  */
+static int stir421x_patch_device(struct irda_usb_cb *self)
+{
+	unsigned int i;
+	int ret;
+	char stir421x_fw_name[12];
+	const struct firmware *fw;
+	const unsigned char *fw_version_ptr; /* pointer to version string */
+	unsigned long fw_version = 0;
+
+        /*
+         * Known firmware patch file names for STIR421x dongles
+         * are "42101001.sb" or "42101002.sb"
+         */
+        sprintf(stir421x_fw_name, "4210%4X.sb",
+                self->usbdev->descriptor.bcdDevice);
+        ret = request_firmware(&fw, stir421x_fw_name, &self->usbdev->dev);
+        if (ret < 0)
+                return ret;
+
+        /* We get a patch from userspace */
+	net_info_ratelimited("%s(): Received firmware %s (%zu bytes)\n",
+			     __func__, stir421x_fw_name, fw->size);
+
+        ret = -EINVAL;
+
+	/* Get the bcd product version */
+        if (!memcmp(fw->data, STIR421X_PATCH_PRODUCT_VER,
+                    sizeof(STIR421X_PATCH_PRODUCT_VER) - 1)) {
+                fw_version_ptr = fw->data +
+			sizeof(STIR421X_PATCH_PRODUCT_VER) - 1;
+
+                /* Let's check if the product version is dotted */
+                if (fw_version_ptr[3] == '.' &&
+		    fw_version_ptr[7] == '.') {
+			unsigned long major, minor, build;
+			major = simple_strtoul(fw_version_ptr, NULL, 10);
+			minor = simple_strtoul(fw_version_ptr + 4, NULL, 10);
+			build = simple_strtoul(fw_version_ptr + 8, NULL, 10);
+
+			fw_version = (major << 12)
+				+ (minor << 8)
+				+ ((build / 10) << 4)
+				+ (build % 10);
+
+			pr_debug("%s(): Firmware Product version %ld\n",
+				 __func__, fw_version);
+                }
+        }
+
+        if (self->usbdev->descriptor.bcdDevice == cpu_to_le16(fw_version)) {
+                /*
+		 * If we're here, we've found a correct patch
+                 * The actual image starts after the "STMP" keyword
+                 * so forward to the firmware header tag
+                 */
+                for (i = 0; i < fw->size && fw->data[i] !=
+			     STIR421X_PATCH_END_OF_HDR_TAG; i++) ;
+                /* here we check for the out of buffer case */
+                if (i < STIR421X_PATCH_CODE_OFFSET && i < fw->size &&
+				STIR421X_PATCH_END_OF_HDR_TAG == fw->data[i]) {
+                        if (!memcmp(fw->data + i + 1, STIR421X_PATCH_STMP_TAG,
+                                    sizeof(STIR421X_PATCH_STMP_TAG) - 1)) {
+
+				/* We can upload the patch to the target */
+				i += sizeof(STIR421X_PATCH_STMP_TAG);
+                                ret = stir421x_fw_upload(self, &fw->data[i],
+							 fw->size - i);
+                        }
+                }
+        }
+
+        release_firmware(fw);
+
+        return ret;
+}
+
+
+/********************** IRDA DEVICE CALLBACKS **********************/
+/*
+ * Main calls from the IrDA/Network subsystem.
+ * Mostly registering a new irda-usb device and removing it....
+ * We only deal with the IrDA side of the business, the USB side will
+ * be dealt with below...
+ */
+
+
+/*------------------------------------------------------------------*/
+/*
+ * Function irda_usb_net_open (dev)
+ *
+ *    Network device is taken up. Usually this is done by "ifconfig irda0 up" 
+ *   
+ * Note : don't mess with self->netopen - Jean II
+ */
+static int irda_usb_net_open(struct net_device *netdev)
+{
+	struct irda_usb_cb *self;
+	unsigned long flags;
+	char	hwname[16];
+	int i;
+	
+	IRDA_ASSERT(netdev != NULL, return -1;);
+	self = netdev_priv(netdev);
+	IRDA_ASSERT(self != NULL, return -1;);
+
+	spin_lock_irqsave(&self->lock, flags);
+	/* Can only open the device if it's there */
+	if(!self->present) {
+		spin_unlock_irqrestore(&self->lock, flags);
+		net_warn_ratelimited("%s(), device not present!\n", __func__);
+		return -1;
+	}
+
+	if(self->needspatch) {
+		spin_unlock_irqrestore(&self->lock, flags);
+		net_warn_ratelimited("%s(), device needs patch\n", __func__);
+		return -EIO ;
+	}
+
+	/* Initialise default speed and xbofs value
+	 * (IrLAP will change that soon) */
+	self->speed = -1;
+	self->xbofs = -1;
+	self->new_speed = -1;
+	self->new_xbofs = -1;
+
+	/* To do *before* submitting Rx urbs and starting net Tx queue
+	 * Jean II */
+	self->netopen = 1;
+	spin_unlock_irqrestore(&self->lock, flags);
+
+	/* 
+	 * Now that everything should be initialized properly,
+	 * Open new IrLAP layer instance to take care of us...
+	 * Note : will send immediately a speed change...
+	 */
+	sprintf(hwname, "usb#%d", self->usbdev->devnum);
+	self->irlap = irlap_open(netdev, &self->qos, hwname);
+	IRDA_ASSERT(self->irlap != NULL, return -1;);
+
+	/* Allow IrLAP to send data to us */
+	netif_start_queue(netdev);
+
+	/* We submit all the Rx URB except for one that we keep idle.
+	 * Need to be initialised before submitting other USBs, because
+	 * in some cases as soon as we submit the URBs the USB layer
+	 * will trigger a dummy receive - Jean II */
+	self->idle_rx_urb = self->rx_urb[IU_MAX_ACTIVE_RX_URBS];
+	self->idle_rx_urb->context = NULL;
+
+	/* Now that we can pass data to IrLAP, allow the USB layer
+	 * to send us some data... */
+	for (i = 0; i < IU_MAX_ACTIVE_RX_URBS; i++) {
+		struct sk_buff *skb = dev_alloc_skb(IRDA_SKB_MAX_MTU);
+		if (!skb) {
+			/* If this ever happen, we are in deep s***.
+			 * Basically, we can't start the Rx path... */
+			return -1;
+		}
+		//skb_reserve(newskb, USB_IRDA_HEADER - 1);
+		irda_usb_submit(self, skb, self->rx_urb[i]);
+	}
+
+	/* Ready to play !!! */
+	return 0;
+}
+
+/*------------------------------------------------------------------*/
+/*
+ * Function irda_usb_net_close (self)
+ *
+ *    Network device is taken down. Usually this is done by 
+ *    "ifconfig irda0 down" 
+ */
+static int irda_usb_net_close(struct net_device *netdev)
+{
+	struct irda_usb_cb *self;
+	int	i;
+
+	IRDA_ASSERT(netdev != NULL, return -1;);
+	self = netdev_priv(netdev);
+	IRDA_ASSERT(self != NULL, return -1;);
+
+	/* Clear this flag *before* unlinking the urbs and *before*
+	 * stopping the network Tx queue - Jean II */
+	self->netopen = 0;
+
+	/* Stop network Tx queue */
+	netif_stop_queue(netdev);
+
+	/* Kill defered Rx URB */
+	del_timer(&self->rx_defer_timer);
+
+	/* Deallocate all the Rx path buffers (URBs and skb) */
+	for (i = 0; i < self->max_rx_urb; i++) {
+		struct urb *urb = self->rx_urb[i];
+		struct sk_buff *skb = (struct sk_buff *) urb->context;
+		/* Cancel the receive command */
+		usb_kill_urb(urb);
+		/* The skb is ours, free it */
+		if(skb) {
+			dev_kfree_skb(skb);
+			urb->context = NULL;
+		}
+	}
+	/* Cancel Tx and speed URB - need to be synchronous to avoid races */
+	usb_kill_urb(self->tx_urb);
+	usb_kill_urb(self->speed_urb);
+
+	/* Stop and remove instance of IrLAP */
+	if (self->irlap)
+		irlap_close(self->irlap);
+	self->irlap = NULL;
+
+	return 0;
+}
+
+/*------------------------------------------------------------------*/
+/*
+ * IOCTLs : Extra out-of-band network commands...
+ */
+static int irda_usb_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
+{
+	unsigned long flags;
+	struct if_irda_req *irq = (struct if_irda_req *) rq;
+	struct irda_usb_cb *self;
+	int ret = 0;
+
+	IRDA_ASSERT(dev != NULL, return -1;);
+	self = netdev_priv(dev);
+	IRDA_ASSERT(self != NULL, return -1;);
+
+	pr_debug("%s(), %s, (cmd=0x%X)\n", __func__, dev->name, cmd);
+
+	switch (cmd) {
+	case SIOCSBANDWIDTH: /* Set bandwidth */
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+		/* Protect us from USB callbacks, net watchdog and else. */
+		spin_lock_irqsave(&self->lock, flags);
+		/* Check if the device is still there */
+		if(self->present) {
+			/* Set the desired speed */
+			self->new_speed = irq->ifr_baudrate;
+			irda_usb_change_speed_xbofs(self);
+		}
+		spin_unlock_irqrestore(&self->lock, flags);
+		break;
+	case SIOCSMEDIABUSY: /* Set media busy */
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+		/* Check if the IrDA stack is still there */
+		if(self->netopen)
+			irda_device_set_media_busy(self->netdev, TRUE);
+		break;
+	case SIOCGRECEIVING: /* Check if we are receiving right now */
+		irq->ifr_receiving = irda_usb_is_receiving(self);
+		break;
+	default:
+		ret = -EOPNOTSUPP;
+	}
+	
+	return ret;
+}
+
+/*------------------------------------------------------------------*/
+
+/********************* IRDA CONFIG SUBROUTINES *********************/
+/*
+ * Various subroutines dealing with IrDA and network stuff we use to
+ * configure and initialise each irda-usb instance.
+ * These functions are used below in the main calls of the driver...
+ */
+
+/*------------------------------------------------------------------*/
+/*
+ * Set proper values in the IrDA QOS structure
+ */
+static inline void irda_usb_init_qos(struct irda_usb_cb *self)
+{
+	struct irda_class_desc *desc;
+
+	
+	desc = self->irda_desc;
+	
+	/* Initialize QoS for this device */
+	irda_init_max_qos_capabilies(&self->qos);
+
+	/* See spec section 7.2 for meaning.
+	 * Values are little endian (as most USB stuff), the IrDA stack
+	 * use it in native order (see parameters.c). - Jean II */
+	self->qos.baud_rate.bits       = le16_to_cpu(desc->wBaudRate);
+	self->qos.min_turn_time.bits   = desc->bmMinTurnaroundTime;
+	self->qos.additional_bofs.bits = desc->bmAdditionalBOFs;
+	self->qos.window_size.bits     = desc->bmWindowSize;
+	self->qos.data_size.bits       = desc->bmDataSize;
+
+	pr_debug("%s(), dongle says speed=0x%X, size=0x%X, window=0x%X, bofs=0x%X, turn=0x%X\n",
+		 __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);
+
+	/* Don't always trust what the dongle tell us */
+	if(self->capability & IUC_SIR_ONLY)
+		self->qos.baud_rate.bits	&= 0x00ff;
+	if(self->capability & IUC_SMALL_PKT)
+		self->qos.data_size.bits	 = 0x07;
+	if(self->capability & IUC_NO_WINDOW)
+		self->qos.window_size.bits	 = 0x01;
+	if(self->capability & IUC_MAX_WINDOW)
+		self->qos.window_size.bits	 = 0x7f;
+	if(self->capability & IUC_MAX_XBOFS)
+		self->qos.additional_bofs.bits	 = 0x01;
+
+#if 1
+	/* Module parameter can override the rx window size */
+	if (qos_mtt_bits)
+		self->qos.min_turn_time.bits = qos_mtt_bits;
+#endif	    
+	/* 
+	 * Note : most of those values apply only for the receive path,
+	 * the transmit path will be set differently - Jean II 
+	 */
+	irda_qos_bits_to_value(&self->qos);
+}
+
+/*------------------------------------------------------------------*/
+static const struct net_device_ops irda_usb_netdev_ops = {
+	.ndo_open       = irda_usb_net_open,
+	.ndo_stop       = irda_usb_net_close,
+	.ndo_do_ioctl   = irda_usb_net_ioctl,
+	.ndo_start_xmit = irda_usb_hard_xmit,
+	.ndo_tx_timeout	= irda_usb_net_timeout,
+};
+
+/*
+ * Initialise the network side of the irda-usb instance
+ * Called when a new USB instance is registered in irda_usb_probe()
+ */
+static inline int irda_usb_open(struct irda_usb_cb *self)
+{
+	struct net_device *netdev = self->netdev;
+
+	netdev->netdev_ops = &irda_usb_netdev_ops;
+
+	irda_usb_init_qos(self);
+
+	return register_netdev(netdev);
+}
+
+/*------------------------------------------------------------------*/
+/*
+ * Cleanup the network side of the irda-usb instance
+ * Called when a USB instance is removed in irda_usb_disconnect()
+ */
+static inline void irda_usb_close(struct irda_usb_cb *self)
+{
+	/* Remove netdevice */
+	unregister_netdev(self->netdev);
+
+	/* Remove the speed buffer */
+	kfree(self->speed_buff);
+	self->speed_buff = NULL;
+
+	kfree(self->tx_buff);
+	self->tx_buff = NULL;
+}
+
+/********************** USB CONFIG SUBROUTINES **********************/
+/*
+ * Various subroutines dealing with USB stuff we use to configure and
+ * initialise each irda-usb instance.
+ * These functions are used below in the main calls of the driver...
+ */
+
+/*------------------------------------------------------------------*/
+/*
+ * Function irda_usb_parse_endpoints(dev, ifnum)
+ *
+ *    Parse the various endpoints and find the one we need.
+ *
+ * The endpoint are the pipes used to communicate with the USB device.
+ * The spec defines 2 endpoints of type bulk transfer, one in, and one out.
+ * These are used to pass frames back and forth with the dongle.
+ * Most dongle have also an interrupt endpoint, that will be probably
+ * documented in the next spec...
+ */
+static inline int irda_usb_parse_endpoints(struct irda_usb_cb *self, struct usb_host_endpoint *endpoint, int ennum)
+{
+	int i;		/* Endpoint index in table */
+		
+	/* Init : no endpoints */
+	self->bulk_in_ep = 0;
+	self->bulk_out_ep = 0;
+	self->bulk_int_ep = 0;
+
+	/* Let's look at all those endpoints */
+	for(i = 0; i < ennum; i++) {
+		/* All those variables will get optimised by the compiler,
+		 * so let's aim for clarity... - Jean II */
+		__u8 ep;	/* Endpoint address */
+		__u8 dir;	/* Endpoint direction */
+		__u8 attr;	/* Endpoint attribute */
+		__u16 psize;	/* Endpoint max packet size in bytes */
+
+		/* Get endpoint address, direction and attribute */
+		ep = endpoint[i].desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
+		dir = endpoint[i].desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK;
+		attr = endpoint[i].desc.bmAttributes;
+		psize = le16_to_cpu(endpoint[i].desc.wMaxPacketSize);
+
+		/* Is it a bulk endpoint ??? */
+		if(attr == USB_ENDPOINT_XFER_BULK) {
+			/* We need to find an IN and an OUT */
+			if(dir == USB_DIR_IN) {
+				/* This is our Rx endpoint */
+				self->bulk_in_ep = ep;
+			} else {
+				/* This is our Tx endpoint */
+				self->bulk_out_ep = ep;
+				self->bulk_out_mtu = psize;
+			}
+		} else {
+			if((attr == USB_ENDPOINT_XFER_INT) &&
+			   (dir == USB_DIR_IN)) {
+				/* This is our interrupt endpoint */
+				self->bulk_int_ep = ep;
+			} else {
+				net_err_ratelimited("%s(), Unrecognised endpoint %02X\n",
+						    __func__, ep);
+			}
+		}
+	}
+
+	pr_debug("%s(), And our endpoints are : in=%02X, out=%02X (%d), int=%02X\n",
+		 __func__, self->bulk_in_ep, self->bulk_out_ep,
+		 self->bulk_out_mtu, self->bulk_int_ep);
+
+	return (self->bulk_in_ep != 0) && (self->bulk_out_ep != 0);
+}
+
+#ifdef IU_DUMP_CLASS_DESC
+/*------------------------------------------------------------------*/
+/*
+ * Function usb_irda_dump_class_desc(desc)
+ *
+ *    Prints out the contents of the IrDA class descriptor
+ *
+ */
+static inline void irda_usb_dump_class_desc(struct irda_class_desc *desc)
+{
+	/* Values are little endian */
+	printk("bLength=%x\n", desc->bLength);
+	printk("bDescriptorType=%x\n", desc->bDescriptorType);
+	printk("bcdSpecRevision=%x\n", le16_to_cpu(desc->bcdSpecRevision)); 
+	printk("bmDataSize=%x\n", desc->bmDataSize);
+	printk("bmWindowSize=%x\n", desc->bmWindowSize);
+	printk("bmMinTurnaroundTime=%d\n", desc->bmMinTurnaroundTime);
+	printk("wBaudRate=%x\n", le16_to_cpu(desc->wBaudRate));
+	printk("bmAdditionalBOFs=%x\n", desc->bmAdditionalBOFs);
+	printk("bIrdaRateSniff=%x\n", desc->bIrdaRateSniff);
+	printk("bMaxUnicastList=%x\n", desc->bMaxUnicastList);
+}
+#endif /* IU_DUMP_CLASS_DESC */
+
+/*------------------------------------------------------------------*/
+/*
+ * Function irda_usb_find_class_desc(intf)
+ *
+ *    Returns instance of IrDA class descriptor, or NULL if not found
+ *
+ * The class descriptor is some extra info that IrDA USB devices will
+ * offer to us, describing their IrDA characteristics. We will use that in
+ * irda_usb_init_qos()
+ */
+static inline struct irda_class_desc *irda_usb_find_class_desc(struct usb_interface *intf)
+{
+	struct usb_device *dev = interface_to_usbdev (intf);
+	struct irda_class_desc *desc;
+	int ret;
+
+	desc = kzalloc(sizeof(*desc), GFP_KERNEL);
+	if (!desc)
+		return NULL;
+
+	/* USB-IrDA class spec 1.0:
+	 *	6.1.3: Standard "Get Descriptor" Device Request is not
+	 *	       appropriate to retrieve class-specific descriptor
+	 *	6.2.5: Class Specific "Get Class Descriptor" Interface Request
+	 *	       is mandatory and returns the USB-IrDA class descriptor
+	 */
+
+	ret = usb_control_msg(dev, usb_rcvctrlpipe(dev,0),
+		IU_REQ_GET_CLASS_DESC,
+		USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
+		0, intf->altsetting->desc.bInterfaceNumber, desc,
+		sizeof(*desc), 500);
+	
+	pr_debug("%s(), ret=%d\n", __func__, ret);
+	if (ret < sizeof(*desc)) {
+		net_warn_ratelimited("usb-irda: class_descriptor read %s (%d)\n",
+				     ret < 0 ? "failed" : "too short", ret);
+	}
+	else if (desc->bDescriptorType != USB_DT_IRDA) {
+		net_warn_ratelimited("usb-irda: bad class_descriptor type\n");
+	}
+	else {
+#ifdef IU_DUMP_CLASS_DESC
+		irda_usb_dump_class_desc(desc);
+#endif	/* IU_DUMP_CLASS_DESC */
+
+		return desc;
+	}
+	kfree(desc);
+	return NULL;
+}
+
+/*********************** USB DEVICE CALLBACKS ***********************/
+/*
+ * Main calls from the USB subsystem.
+ * Mostly registering a new irda-usb device and removing it....
+ */
+
+/*------------------------------------------------------------------*/
+/*
+ * This routine is called by the USB subsystem for each new device
+ * in the system. We need to check if the device is ours, and in
+ * this case start handling it.
+ * The USB layer protect us from reentrancy (via BKL), so we don't need
+ * to spinlock in there... Jean II
+ */
+static int irda_usb_probe(struct usb_interface *intf,
+			  const struct usb_device_id *id)
+{
+	struct net_device *net;
+	struct usb_device *dev = interface_to_usbdev(intf);
+	struct irda_usb_cb *self;
+	struct usb_host_interface *interface;
+	struct irda_class_desc *irda_desc;
+	int ret = -ENOMEM;
+	int i;		/* Driver instance index / Rx URB index */
+
+	/* Note : the probe make sure to call us only for devices that
+	 * matches the list of dongle (top of the file). So, we
+	 * don't need to check if the dongle is really ours.
+	 * Jean II */
+
+	net_info_ratelimited("IRDA-USB found at address %d, Vendor: %x, Product: %x\n",
+			     dev->devnum, le16_to_cpu(dev->descriptor.idVendor),
+			     le16_to_cpu(dev->descriptor.idProduct));
+
+	net = alloc_irdadev(sizeof(*self));
+	if (!net) 
+		goto err_out;
+
+	SET_NETDEV_DEV(net, &intf->dev);
+	self = netdev_priv(net);
+	self->netdev = net;
+	spin_lock_init(&self->lock);
+	init_timer(&self->rx_defer_timer);
+
+	self->capability = id->driver_info;
+	self->needspatch = ((self->capability & IUC_STIR421X) != 0);
+
+	/* Create all of the needed urbs */
+	if (self->capability & IUC_STIR421X) {
+		self->max_rx_urb = IU_SIGMATEL_MAX_RX_URBS;
+		self->header_length = USB_IRDA_STIR421X_HEADER;
+	} else {
+		self->max_rx_urb = IU_MAX_RX_URBS;
+		self->header_length = USB_IRDA_HEADER;
+	}
+
+	self->rx_urb = kcalloc(self->max_rx_urb, sizeof(struct urb *),
+				GFP_KERNEL);
+	if (!self->rx_urb)
+		goto err_free_net;
+
+	for (i = 0; i < self->max_rx_urb; i++) {
+		self->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
+		if (!self->rx_urb[i]) {
+			goto err_out_1;
+		}
+	}
+	self->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
+	if (!self->tx_urb) {
+		goto err_out_1;
+	}
+	self->speed_urb = usb_alloc_urb(0, GFP_KERNEL);
+	if (!self->speed_urb) {
+		goto err_out_2;
+	}
+
+	/* Is this really necessary? (no, except maybe for broken devices) */
+	if (usb_reset_configuration (dev) < 0) {
+		dev_err(&intf->dev, "reset_configuration failed\n");
+		ret = -EIO;
+		goto err_out_3;
+	}
+
+	/* Is this really necessary? */
+	/* Note : some driver do hardcode the interface number, some others
+	 * specify an alternate, but very few driver do like this.
+	 * Jean II */
+	ret = usb_set_interface(dev, intf->altsetting->desc.bInterfaceNumber, 0);
+	pr_debug("usb-irda: set interface %d result %d\n",
+		 intf->altsetting->desc.bInterfaceNumber, ret);
+	switch (ret) {
+		case 0:
+			break;
+		case -EPIPE:		/* -EPIPE = -32 */
+			/* Martin Diehl says if we get a -EPIPE we should
+			 * be fine and we don't need to do a usb_clear_halt().
+			 * - Jean II */
+			pr_debug("%s(), Received -EPIPE, ignoring...\n",
+				 __func__);
+			break;
+		default:
+			pr_debug("%s(), Unknown error %d\n", __func__, ret);
+			ret = -EIO;
+			goto err_out_3;
+	}
+
+	/* Find our endpoints */
+	interface = intf->cur_altsetting;
+	if(!irda_usb_parse_endpoints(self, interface->endpoint,
+				     interface->desc.bNumEndpoints)) {
+		net_err_ratelimited("%s(), Bogus endpoints...\n", __func__);
+		ret = -EIO;
+		goto err_out_3;
+	}
+
+	self->usbdev = dev;
+
+	/* Find IrDA class descriptor */
+	irda_desc = irda_usb_find_class_desc(intf);
+	ret = -ENODEV;
+	if (!irda_desc)
+		goto err_out_3;
+
+	if (self->needspatch) {
+		ret = usb_control_msg (self->usbdev, usb_sndctrlpipe (self->usbdev, 0),
+				       0x02, 0x40, 0, 0, NULL, 0, 500);
+		if (ret < 0) {
+			pr_debug("usb_control_msg failed %d\n", ret);
+			goto err_out_3;
+		} else {
+			mdelay(10);
+		}
+	}
+
+	self->irda_desc =  irda_desc;
+	self->present = 1;
+	self->netopen = 0;
+	self->usbintf = intf;
+
+	/* Allocate the buffer for speed changes */
+	/* Don't change this buffer size and allocation without doing
+	 * some heavy and complete testing. Don't ask why :-(
+	 * Jean II */
+	self->speed_buff = kzalloc(IRDA_USB_SPEED_MTU, GFP_KERNEL);
+	if (!self->speed_buff)
+		goto err_out_3;
+
+	self->tx_buff = kzalloc(IRDA_SKB_MAX_MTU + self->header_length,
+				GFP_KERNEL);
+	if (!self->tx_buff)
+		goto err_out_4;
+
+	ret = irda_usb_open(self);
+	if (ret) 
+		goto err_out_5;
+
+	net_info_ratelimited("IrDA: Registered device %s\n", net->name);
+	usb_set_intfdata(intf, self);
+
+	if (self->needspatch) {
+		/* Now we fetch and upload the firmware patch */
+		ret = stir421x_patch_device(self);
+		self->needspatch = (ret < 0);
+		if (self->needspatch) {
+			net_err_ratelimited("STIR421X: Couldn't upload patch\n");
+			goto err_out_6;
+		}
+
+		/* replace IrDA class descriptor with what patched device is now reporting */
+		irda_desc = irda_usb_find_class_desc (self->usbintf);
+		if (!irda_desc) {
+			ret = -ENODEV;
+			goto err_out_6;
+		}
+		kfree(self->irda_desc);
+		self->irda_desc = irda_desc;
+		irda_usb_init_qos(self);
+	}
+
+	return 0;
+err_out_6:
+	unregister_netdev(self->netdev);
+err_out_5:
+	kfree(self->tx_buff);
+err_out_4:
+	kfree(self->speed_buff);
+err_out_3:
+	/* Free all urbs that we may have created */
+	usb_free_urb(self->speed_urb);
+err_out_2:
+	usb_free_urb(self->tx_urb);
+err_out_1:
+	for (i = 0; i < self->max_rx_urb; i++)
+		usb_free_urb(self->rx_urb[i]);
+	kfree(self->rx_urb);
+err_free_net:
+	free_netdev(net);
+err_out:
+	return ret;
+}
+
+/*------------------------------------------------------------------*/
+/*
+ * The current irda-usb device is removed, the USB layer tell us
+ * to shut it down...
+ * One of the constraints is that when we exit this function,
+ * we cannot use the usb_device no more. Gone. Destroyed. kfree().
+ * Most other subsystem allow you to destroy the instance at a time
+ * when it's convenient to you, to postpone it to a later date, but
+ * not the USB subsystem.
+ * So, we must make bloody sure that everything gets deactivated.
+ * Jean II
+ */
+static void irda_usb_disconnect(struct usb_interface *intf)
+{
+	unsigned long flags;
+	struct irda_usb_cb *self = usb_get_intfdata(intf);
+	int i;
+
+	usb_set_intfdata(intf, NULL);
+	if (!self)
+		return;
+
+	/* Make sure that the Tx path is not executing. - Jean II */
+	spin_lock_irqsave(&self->lock, flags);
+
+	/* Oups ! We are not there any more.
+	 * This will stop/desactivate the Tx path. - Jean II */
+	self->present = 0;
+
+	/* Kill defered Rx URB */
+	del_timer(&self->rx_defer_timer);
+
+	/* We need to have irq enabled to unlink the URBs. That's OK,
+	 * at this point the Tx path is gone - Jean II */
+	spin_unlock_irqrestore(&self->lock, flags);
+
+	/* Hum... Check if networking is still active (avoid races) */
+	if((self->netopen) || (self->irlap)) {
+		/* Accept no more transmissions */
+		/*netif_device_detach(self->netdev);*/
+		netif_stop_queue(self->netdev);
+		/* Stop all the receive URBs. Must be synchronous. */
+		for (i = 0; i < self->max_rx_urb; i++)
+			usb_kill_urb(self->rx_urb[i]);
+		/* Cancel Tx and speed URB.
+		 * Make sure it's synchronous to avoid races. */
+		usb_kill_urb(self->tx_urb);
+		usb_kill_urb(self->speed_urb);
+	}
+
+	/* Cleanup the device stuff */
+	irda_usb_close(self);
+	/* No longer attached to USB bus */
+	self->usbdev = NULL;
+	self->usbintf = NULL;
+
+	/* Clean up our urbs */
+	for (i = 0; i < self->max_rx_urb; i++)
+		usb_free_urb(self->rx_urb[i]);
+	kfree(self->rx_urb);
+	/* Clean up Tx and speed URB */
+	usb_free_urb(self->tx_urb);
+	usb_free_urb(self->speed_urb);
+
+	/* Free self and network device */
+	free_netdev(self->netdev);
+	pr_debug("%s(), USB IrDA Disconnected\n", __func__);
+}
+
+#ifdef CONFIG_PM
+/* USB suspend, so power off the transmitter/receiver */
+static int irda_usb_suspend(struct usb_interface *intf, pm_message_t message)
+{
+	struct irda_usb_cb *self = usb_get_intfdata(intf);
+	int i;
+
+	netif_device_detach(self->netdev);
+
+	if (self->tx_urb != NULL)
+		usb_kill_urb(self->tx_urb);
+	if (self->speed_urb != NULL)
+		usb_kill_urb(self->speed_urb);
+	for (i = 0; i < self->max_rx_urb; i++) {
+		if (self->rx_urb[i] != NULL)
+			usb_kill_urb(self->rx_urb[i]);
+	}
+	return 0;
+}
+
+/* Coming out of suspend, so reset hardware */
+static int irda_usb_resume(struct usb_interface *intf)
+{
+	struct irda_usb_cb *self = usb_get_intfdata(intf);
+	int i;
+
+	for (i = 0; i < self->max_rx_urb; i++) {
+		if (self->rx_urb[i] != NULL)
+			usb_submit_urb(self->rx_urb[i], GFP_KERNEL);
+	}
+
+	netif_device_attach(self->netdev);
+	return 0;
+}
+#endif
+
+/*------------------------------------------------------------------*/
+/*
+ * USB device callbacks
+ */
+static struct usb_driver irda_driver = {
+	.name		= "irda-usb",
+	.probe		= irda_usb_probe,
+	.disconnect	= irda_usb_disconnect,
+	.id_table	= dongles,
+#ifdef CONFIG_PM
+	.suspend	= irda_usb_suspend,
+	.resume		= irda_usb_resume,
+#endif
+};
+
+module_usb_driver(irda_driver);
+
+/*
+ * Module parameters
+ */
+module_param(qos_mtt_bits, int, 0);
+MODULE_PARM_DESC(qos_mtt_bits, "Minimum Turn Time");
+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>");
+MODULE_DESCRIPTION("IrDA-USB Dongle Driver");
+MODULE_LICENSE("GPL");