Update compat-wireless to 2.6.36-5-spn

chromeos/compat-wireless/drivers/net/wireless/orinoco/orinoco_usb.c

+/*
+ * USB Orinoco driver
+ *
+ * Copyright (c) 2003 Manuel Estrada Sainz
+ *
+ * The contents of this file are subject to the Mozilla Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License
+ * at http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+ * the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * Alternatively, the contents of this file may be used under the
+ * terms of the GNU General Public License version 2 (the "GPL"), in
+ * which case the provisions of the GPL are applicable instead of the
+ * above.  If you wish to allow the use of your version of this file
+ * only under the terms of the GPL and not to allow others to use your
+ * version of this file under the MPL, indicate your decision by
+ * deleting the provisions above and replace them with the notice and
+ * other provisions required by the GPL.  If you do not delete the
+ * provisions above, a recipient may use your version of this file
+ * under either the MPL or the GPL.
+ *
+ * Queueing code based on linux-wlan-ng 0.2.1-pre5
+ *
+ * Copyright (C) 1999 AbsoluteValue Systems, Inc.  All Rights Reserved.
+ *
+ *      The license is the same as above.
+ *
+ * Initialy based on USB Skeleton driver - 0.7
+ *
+ * Copyright (c) 2001 Greg Kroah-Hartman (greg@kroah.com)
+ *
+ *      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.
+ *
+ * NOTE: The original USB Skeleton driver is GPL, but all that code is
+ * gone so MPL/GPL applies.
+ */
+
+#define DRIVER_NAME "orinoco_usb"
+#define PFX DRIVER_NAME ": "
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/signal.h>
+#include <linux/errno.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/fcntl.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/smp_lock.h>
+#include <linux/usb.h>
+#include <linux/timer.h>
+
+#include <linux/netdevice.h>
+#include <linux/if_arp.h>
+#include <linux/etherdevice.h>
+#include <linux/wireless.h>
+#include <linux/firmware.h>
+
+#include "mic.h"
+#include "orinoco.h"
+
+#ifndef URB_ASYNC_UNLINK
+#define URB_ASYNC_UNLINK 0
+#endif
+
+/* 802.2 LLC/SNAP header used for Ethernet encapsulation over 802.11 */
+static const u8 encaps_hdr[] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00};
+#define ENCAPS_OVERHEAD         (sizeof(encaps_hdr) + 2)
+
+struct header_struct {
+        /* 802.3 */
+        u8 dest[ETH_ALEN];
+        u8 src[ETH_ALEN];
+        __be16 len;
+        /* 802.2 */
+        u8 dsap;
+        u8 ssap;
+        u8 ctrl;
+        /* SNAP */
+        u8 oui[3];
+        __be16 ethertype;
+} __packed;
+
+struct ez_usb_fw {
+        u16 size;
+        const u8 *code;
+};
+
+static struct ez_usb_fw firmware = {
+        .size = 0,
+        .code = NULL,
+};
+
+#ifdef CONFIG_USB_DEBUG
+static int debug = 1;
+#else
+static int debug;
+#endif
+
+/* Debugging macros */
+#undef dbg
+#define dbg(format, arg...) \
+        do { if (debug) printk(KERN_DEBUG PFX "%s: " format "\n", \
+                               __func__ , ## arg); } while (0)
+#undef err
+#define err(format, arg...) \
+        do { printk(KERN_ERR PFX format "\n", ## arg); } while (0)
+
+/* Module paramaters */
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Debug enabled or not");
+
+MODULE_FIRMWARE("orinoco_ezusb_fw");
+
+/*
+ * Under some conditions, the card gets stuck and stops paying attention
+ * to the world (i.e. data communication stalls) until we do something to
+ * it.  Sending an INQ_TALLIES command seems to be enough and should be
+ * harmless otherwise.  This behaviour has been observed when using the
+ * driver on a systemimager client during installation.  In the past a
+ * timer was used to send INQ_TALLIES commands when there was no other
+ * activity, but it was troublesome and was removed.
+ */
+
+#define USB_COMPAQ_VENDOR_ID     0x049f /* Compaq Computer Corp. */
+#define USB_COMPAQ_WL215_ID      0x001f /* Compaq WL215 USB Adapter */
+#define USB_COMPAQ_W200_ID       0x0076 /* Compaq W200 USB Adapter */
+#define USB_HP_WL215_ID          0x0082 /* Compaq WL215 USB Adapter */
+
+#define USB_MELCO_VENDOR_ID      0x0411
+#define USB_BUFFALO_L11_ID       0x0006 /* BUFFALO WLI-USB-L11 */
+#define USB_BUFFALO_L11G_WR_ID   0x000B /* BUFFALO WLI-USB-L11G-WR */
+#define USB_BUFFALO_L11G_ID      0x000D /* BUFFALO WLI-USB-L11G */
+
+#define USB_LUCENT_VENDOR_ID     0x047E /* Lucent Technologies */
+#define USB_LUCENT_ORINOCO_ID    0x0300 /* Lucent/Agere Orinoco USB Client */
+
+#define USB_AVAYA8_VENDOR_ID     0x0D98
+#define USB_AVAYAE_VENDOR_ID     0x0D9E
+#define USB_AVAYA_WIRELESS_ID    0x0300 /* Avaya Wireless USB Card */
+
+#define USB_AGERE_VENDOR_ID      0x0D4E /* Agere Systems */
+#define USB_AGERE_MODEL0801_ID   0x1000 /* Wireless USB Card Model 0801 */
+#define USB_AGERE_MODEL0802_ID   0x1001 /* Wireless USB Card Model 0802 */
+#define USB_AGERE_REBRANDED_ID   0x047A /* WLAN USB Card */
+
+#define USB_ELSA_VENDOR_ID       0x05CC
+#define USB_ELSA_AIRLANCER_ID    0x3100 /* ELSA AirLancer USB-11 */
+
+#define USB_LEGEND_VENDOR_ID     0x0E7C
+#define USB_LEGEND_JOYNET_ID     0x0300 /* Joynet WLAN USB Card */
+
+#define USB_SAMSUNG_VENDOR_ID    0x04E8
+#define USB_SAMSUNG_SEW2001U1_ID 0x5002 /* Samsung SEW-2001u Card */
+#define USB_SAMSUNG_SEW2001U2_ID 0x5B11 /* Samsung SEW-2001u Card */
+#define USB_SAMSUNG_SEW2003U_ID  0x7011 /* Samsung SEW-2003U Card */
+
+#define USB_IGATE_VENDOR_ID      0x0681
+#define USB_IGATE_IGATE_11M_ID   0x0012 /* I-GATE 11M USB Card */
+
+#define USB_FUJITSU_VENDOR_ID    0x0BF8
+#define USB_FUJITSU_E1100_ID     0x1002 /* connect2AIR WLAN E-1100 USB */
+
+#define USB_2WIRE_VENDOR_ID      0x1630
+#define USB_2WIRE_WIRELESS_ID    0xff81 /* 2Wire Wireless USB adapter */
+
+
+#define EZUSB_REQUEST_FW_TRANS          0xA0
+#define EZUSB_REQUEST_TRIGER            0xAA
+#define EZUSB_REQUEST_TRIG_AC           0xAC
+#define EZUSB_CPUCS_REG                 0x7F92
+
+#define EZUSB_RID_TX                    0x0700
+#define EZUSB_RID_RX                    0x0701
+#define EZUSB_RID_INIT1                 0x0702
+#define EZUSB_RID_ACK                   0x0710
+#define EZUSB_RID_READ_PDA              0x0800
+#define EZUSB_RID_PROG_INIT             0x0852
+#define EZUSB_RID_PROG_SET_ADDR         0x0853
+#define EZUSB_RID_PROG_BYTES            0x0854
+#define EZUSB_RID_PROG_END              0x0855
+#define EZUSB_RID_DOCMD                 0x0860
+
+/* Recognize info frames */
+#define EZUSB_IS_INFO(id)               ((id >= 0xF000) && (id <= 0xF2FF))
+
+#define EZUSB_MAGIC                     0x0210
+
+#define EZUSB_FRAME_DATA                1
+#define EZUSB_FRAME_CONTROL             2
+
+#define DEF_TIMEOUT                     (3*HZ)
+
+#define BULK_BUF_SIZE                   2048
+
+#define MAX_DL_SIZE (BULK_BUF_SIZE - sizeof(struct ezusb_packet))
+
+#define FW_BUF_SIZE                     64
+#define FW_VAR_OFFSET_PTR               0x359
+#define FW_VAR_VALUE                    0
+#define FW_HOLE_START                   0x100
+#define FW_HOLE_END                     0x300
+
+struct ezusb_packet {
+        __le16 magic;           /* 0x0210 */
+        u8 req_reply_count;
+        u8 ans_reply_count;
+        __le16 frame_type;      /* 0x01 for data frames, 0x02 otherwise */
+        __le16 size;            /* transport size */
+        __le16 crc;             /* CRC up to here */
+        __le16 hermes_len;
+        __le16 hermes_rid;
+        u8 data[0];
+} __packed;
+
+/* Table of devices that work or may work with this driver */
+static struct usb_device_id ezusb_table[] = {
+        {USB_DEVICE(USB_COMPAQ_VENDOR_ID, USB_COMPAQ_WL215_ID)},
+        {USB_DEVICE(USB_COMPAQ_VENDOR_ID, USB_HP_WL215_ID)},
+        {USB_DEVICE(USB_COMPAQ_VENDOR_ID, USB_COMPAQ_W200_ID)},
+        {USB_DEVICE(USB_MELCO_VENDOR_ID, USB_BUFFALO_L11_ID)},
+        {USB_DEVICE(USB_MELCO_VENDOR_ID, USB_BUFFALO_L11G_WR_ID)},
+        {USB_DEVICE(USB_MELCO_VENDOR_ID, USB_BUFFALO_L11G_ID)},
+        {USB_DEVICE(USB_LUCENT_VENDOR_ID, USB_LUCENT_ORINOCO_ID)},
+        {USB_DEVICE(USB_AVAYA8_VENDOR_ID, USB_AVAYA_WIRELESS_ID)},
+        {USB_DEVICE(USB_AVAYAE_VENDOR_ID, USB_AVAYA_WIRELESS_ID)},
+        {USB_DEVICE(USB_AGERE_VENDOR_ID, USB_AGERE_MODEL0801_ID)},
+        {USB_DEVICE(USB_AGERE_VENDOR_ID, USB_AGERE_MODEL0802_ID)},
+        {USB_DEVICE(USB_ELSA_VENDOR_ID, USB_ELSA_AIRLANCER_ID)},
+        {USB_DEVICE(USB_LEGEND_VENDOR_ID, USB_LEGEND_JOYNET_ID)},
+        {USB_DEVICE_VER(USB_SAMSUNG_VENDOR_ID, USB_SAMSUNG_SEW2001U1_ID,
+                        0, 0)},
+        {USB_DEVICE(USB_SAMSUNG_VENDOR_ID, USB_SAMSUNG_SEW2001U2_ID)},
+        {USB_DEVICE(USB_SAMSUNG_VENDOR_ID, USB_SAMSUNG_SEW2003U_ID)},
+        {USB_DEVICE(USB_IGATE_VENDOR_ID, USB_IGATE_IGATE_11M_ID)},
+        {USB_DEVICE(USB_FUJITSU_VENDOR_ID, USB_FUJITSU_E1100_ID)},
+        {USB_DEVICE(USB_2WIRE_VENDOR_ID, USB_2WIRE_WIRELESS_ID)},
+        {USB_DEVICE(USB_AGERE_VENDOR_ID, USB_AGERE_REBRANDED_ID)},
+        {}                      /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(usb, ezusb_table);
+
+/* Structure to hold all of our device specific stuff */
+struct ezusb_priv {
+        struct usb_device *udev;
+        struct net_device *dev;
+        struct mutex mtx;
+        spinlock_t req_lock;
+        struct list_head req_pending;
+        struct list_head req_active;
+        spinlock_t reply_count_lock;
+        u16 hermes_reg_fake[0x40];
+        u8 *bap_buf;
+        struct urb *read_urb;
+        int read_pipe;
+        int write_pipe;
+        u8 reply_count;
+};
+
+enum ezusb_state {
+        EZUSB_CTX_START,
+        EZUSB_CTX_QUEUED,
+        EZUSB_CTX_REQ_SUBMITTED,
+        EZUSB_CTX_REQ_COMPLETE,
+        EZUSB_CTX_RESP_RECEIVED,
+        EZUSB_CTX_REQ_TIMEOUT,
+        EZUSB_CTX_REQ_FAILED,
+        EZUSB_CTX_RESP_TIMEOUT,
+        EZUSB_CTX_REQSUBMIT_FAIL,
+        EZUSB_CTX_COMPLETE,
+};
+
+struct request_context {
+        struct list_head list;
+        atomic_t refcount;
+        struct completion done; /* Signals that CTX is dead */
+        int killed;
+        struct urb *outurb;     /* OUT for req pkt */
+        struct ezusb_priv *upriv;
+        struct ezusb_packet *buf;
+        int buf_length;
+        struct timer_list timer;        /* Timeout handling */
+        enum ezusb_state state; /* Current state */
+        /* the RID that we will wait for */
+        u16 out_rid;
+        u16 in_rid;
+};
+
+
+/* Forward declarations */
+static void ezusb_ctx_complete(struct request_context *ctx);
+static void ezusb_req_queue_run(struct ezusb_priv *upriv);
+static void ezusb_bulk_in_callback(struct urb *urb);
+
+static inline u8 ezusb_reply_inc(u8 count)
+{
+        if (count < 0x7F)
+                return count + 1;
+        else
+                return 1;
+}
+
+static void ezusb_request_context_put(struct request_context *ctx)
+{
+        if (!atomic_dec_and_test(&ctx->refcount))
+                return;
+
+        WARN_ON(!ctx->done.done);
+        BUG_ON(ctx->outurb->status == -EINPROGRESS);
+        BUG_ON(timer_pending(&ctx->timer));
+        usb_free_urb(ctx->outurb);
+        kfree(ctx->buf);
+        kfree(ctx);
+}
+
+static inline void ezusb_mod_timer(struct ezusb_priv *upriv,
+                                   struct timer_list *timer,
+                                   unsigned long expire)
+{
+        if (!upriv->udev)
+                return;
+        mod_timer(timer, expire);
+}
+
+static void ezusb_request_timerfn(u_long _ctx)
+{
+        struct request_context *ctx = (void *) _ctx;
+
+        ctx->outurb->transfer_flags |= URB_ASYNC_UNLINK;
+        if (usb_unlink_urb(ctx->outurb) == -EINPROGRESS) {
+                ctx->state = EZUSB_CTX_REQ_TIMEOUT;
+        } else {
+                ctx->state = EZUSB_CTX_RESP_TIMEOUT;
+                dbg("couldn't unlink");
+                atomic_inc(&ctx->refcount);
+                ctx->killed = 1;
+                ezusb_ctx_complete(ctx);
+                ezusb_request_context_put(ctx);
+        }
+};
+
+static struct request_context *ezusb_alloc_ctx(struct ezusb_priv *upriv,
+                                               u16 out_rid, u16 in_rid)
+{
+        struct request_context *ctx;
+
+        ctx = kzalloc(sizeof(*ctx), GFP_ATOMIC);
+        if (!ctx)
+                return NULL;
+
+        ctx->buf = kmalloc(BULK_BUF_SIZE, GFP_ATOMIC);
+        if (!ctx->buf) {
+                kfree(ctx);
+                return NULL;
+        }
+        ctx->outurb = usb_alloc_urb(0, GFP_ATOMIC);
+        if (!ctx->outurb) {
+                kfree(ctx->buf);
+                kfree(ctx);
+                return NULL;
+        }
+
+        ctx->upriv = upriv;
+        ctx->state = EZUSB_CTX_START;
+        ctx->out_rid = out_rid;
+        ctx->in_rid = in_rid;
+
+        atomic_set(&ctx->refcount, 1);
+        init_completion(&ctx->done);
+
+        init_timer(&ctx->timer);
+        ctx->timer.function = ezusb_request_timerfn;
+        ctx->timer.data = (u_long) ctx;
+        return ctx;
+}
+
+
+/* Hopefully the real complete_all will soon be exported, in the mean
+ * while this should work. */
+static inline void ezusb_complete_all(struct completion *comp)
+{
+        complete(comp);
+        complete(comp);
+        complete(comp);
+        complete(comp);
+}
+
+static void ezusb_ctx_complete(struct request_context *ctx)
+{
+        struct ezusb_priv *upriv = ctx->upriv;
+        unsigned long flags;
+
+        spin_lock_irqsave(&upriv->req_lock, flags);
+
+        list_del_init(&ctx->list);
+        if (upriv->udev) {
+                spin_unlock_irqrestore(&upriv->req_lock, flags);
+                ezusb_req_queue_run(upriv);
+                spin_lock_irqsave(&upriv->req_lock, flags);
+        }
+
+        switch (ctx->state) {
+        case EZUSB_CTX_COMPLETE:
+        case EZUSB_CTX_REQSUBMIT_FAIL:
+        case EZUSB_CTX_REQ_FAILED:
+        case EZUSB_CTX_REQ_TIMEOUT:
+        case EZUSB_CTX_RESP_TIMEOUT:
+                spin_unlock_irqrestore(&upriv->req_lock, flags);
+
+                if ((ctx->out_rid == EZUSB_RID_TX) && upriv->dev) {
+                        struct net_device *dev = upriv->dev;
+                        struct orinoco_private *priv = ndev_priv(dev);
+                        struct net_device_stats *stats = &priv->stats;
+
+                        if (ctx->state != EZUSB_CTX_COMPLETE)
+                                stats->tx_errors++;
+                        else
+                                stats->tx_packets++;
+
+                        netif_wake_queue(dev);
+                }
+                ezusb_complete_all(&ctx->done);
+                ezusb_request_context_put(ctx);
+                break;
+
+        default:
+                spin_unlock_irqrestore(&upriv->req_lock, flags);
+                if (!upriv->udev) {
+                        /* This is normal, as all request contexts get flushed
+                         * when the device is disconnected */
+                        err("Called, CTX not terminating, but device gone");
+                        ezusb_complete_all(&ctx->done);
+                        ezusb_request_context_put(ctx);
+                        break;
+                }
+
+                err("Called, CTX not in terminating state.");
+                /* Things are really bad if this happens. Just leak
+                 * the CTX because it may still be linked to the
+                 * queue or the OUT urb may still be active.
+                 * Just leaking at least prevents an Oops or Panic.
+                 */
+                break;
+        }
+}
+
+/**
+ * ezusb_req_queue_run:
+ * Description:
+ *      Note: Only one active CTX at any one time, because there's no
+ *      other (reliable) way to match the response URB to the correct
+ *      CTX.
+ **/
+static void ezusb_req_queue_run(struct ezusb_priv *upriv)
+{
+        unsigned long flags;
+        struct request_context *ctx;
+        int result;
+
+        spin_lock_irqsave(&upriv->req_lock, flags);
+
+        if (!list_empty(&upriv->req_active))
+                goto unlock;
+
+        if (list_empty(&upriv->req_pending))
+                goto unlock;
+
+        ctx =
+            list_entry(upriv->req_pending.next, struct request_context,
+                       list);
+
+        if (!ctx->upriv->udev)
+                goto unlock;
+
+        /* We need to split this off to avoid a race condition */
+        list_move_tail(&ctx->list, &upriv->req_active);
+
+        if (ctx->state == EZUSB_CTX_QUEUED) {
+                atomic_inc(&ctx->refcount);
+                result = usb_submit_urb(ctx->outurb, GFP_ATOMIC);
+                if (result) {
+                        ctx->state = EZUSB_CTX_REQSUBMIT_FAIL;
+
+                        spin_unlock_irqrestore(&upriv->req_lock, flags);
+
+                        err("Fatal, failed to submit command urb."
+                            " error=%d\n", result);
+
+                        ezusb_ctx_complete(ctx);
+                        ezusb_request_context_put(ctx);
+                        goto done;
+                }
+
+                ctx->state = EZUSB_CTX_REQ_SUBMITTED;
+                ezusb_mod_timer(ctx->upriv, &ctx->timer,
+                                jiffies + DEF_TIMEOUT);
+        }
+
+ unlock:
+        spin_unlock_irqrestore(&upriv->req_lock, flags);
+
+ done:
+        return;
+}
+
+static void ezusb_req_enqueue_run(struct ezusb_priv *upriv,
+                                  struct request_context *ctx)
+{
+        unsigned long flags;
+
+        spin_lock_irqsave(&upriv->req_lock, flags);
+
+        if (!ctx->upriv->udev) {
+                spin_unlock_irqrestore(&upriv->req_lock, flags);
+                goto done;
+        }
+        atomic_inc(&ctx->refcount);
+        list_add_tail(&ctx->list, &upriv->req_pending);
+        spin_unlock_irqrestore(&upriv->req_lock, flags);
+
+        ctx->state = EZUSB_CTX_QUEUED;
+        ezusb_req_queue_run(upriv);
+
+ done:
+        return;
+}
+
+static void ezusb_request_out_callback(struct urb *urb)
+{
+        unsigned long flags;
+        enum ezusb_state state;
+        struct request_context *ctx = urb->context;
+        struct ezusb_priv *upriv = ctx->upriv;
+
+        spin_lock_irqsave(&upriv->req_lock, flags);
+
+        del_timer(&ctx->timer);
+
+        if (ctx->killed) {
+                spin_unlock_irqrestore(&upriv->req_lock, flags);
+                pr_warning("interrupt called with dead ctx");
+                goto out;
+        }
+
+        state = ctx->state;
+
+        if (urb->status == 0) {
+                switch (state) {
+                case EZUSB_CTX_REQ_SUBMITTED:
+                        if (ctx->in_rid) {
+                                ctx->state = EZUSB_CTX_REQ_COMPLETE;
+                                /* reply URB still pending */
+                                ezusb_mod_timer(upriv, &ctx->timer,
+                                                jiffies + DEF_TIMEOUT);
+                                spin_unlock_irqrestore(&upriv->req_lock,
+                                                       flags);
+                                break;
+                        }
+                        /* fall through */
+                case EZUSB_CTX_RESP_RECEIVED:
+                        /* IN already received before this OUT-ACK */
+                        ctx->state = EZUSB_CTX_COMPLETE;
+                        spin_unlock_irqrestore(&upriv->req_lock, flags);
+                        ezusb_ctx_complete(ctx);
+                        break;
+
+                default:
+                        spin_unlock_irqrestore(&upriv->req_lock, flags);
+                        err("Unexpected state(0x%x, %d) in OUT URB",
+                            state, urb->status);
+                        break;
+                }
+        } else {
+                /* If someone cancels the OUT URB then its status
+                 * should be either -ECONNRESET or -ENOENT.
+                 */
+                switch (state) {
+                case EZUSB_CTX_REQ_SUBMITTED:
+                case EZUSB_CTX_RESP_RECEIVED:
+                        ctx->state = EZUSB_CTX_REQ_FAILED;
+                        /* fall through */
+
+                case EZUSB_CTX_REQ_FAILED:
+                case EZUSB_CTX_REQ_TIMEOUT:
+                        spin_unlock_irqrestore(&upriv->req_lock, flags);
+
+                        ezusb_ctx_complete(ctx);
+                        break;
+
+                default:
+                        spin_unlock_irqrestore(&upriv->req_lock, flags);
+
+                        err("Unexpected state(0x%x, %d) in OUT URB",
+                            state, urb->status);
+                        break;
+                }
+        }
+ out:
+        ezusb_request_context_put(ctx);
+}
+
+static void ezusb_request_in_callback(struct ezusb_priv *upriv,
+                                      struct urb *urb)
+{
+        struct ezusb_packet *ans = urb->transfer_buffer;
+        struct request_context *ctx = NULL;
+        enum ezusb_state state;
+        unsigned long flags;
+
+        /* Find the CTX on the active queue that requested this URB */
+        spin_lock_irqsave(&upriv->req_lock, flags);
+        if (upriv->udev) {
+                struct list_head *item;
+
+                list_for_each(item, &upriv->req_active) {
+                        struct request_context *c;
+                        int reply_count;
+
+                        c = list_entry(item, struct request_context, list);
+                        reply_count =
+                            ezusb_reply_inc(c->buf->req_reply_count);
+                        if ((ans->ans_reply_count == reply_count)
+                            && (le16_to_cpu(ans->hermes_rid) == c->in_rid)) {
+                                ctx = c;
+                                break;
+                        }
+                        dbg("Skipped (0x%x/0x%x) (%d/%d)",
+                            le16_to_cpu(ans->hermes_rid),
+                            c->in_rid, ans->ans_reply_count, reply_count);
+                }
+        }
+
+        if (ctx == NULL) {
+                spin_unlock_irqrestore(&upriv->req_lock, flags);
+                err("%s: got unexpected RID: 0x%04X", __func__,
+                    le16_to_cpu(ans->hermes_rid));
+                ezusb_req_queue_run(upriv);
+                return;
+        }
+
+        /* The data we want is in the in buffer, exchange */
+        urb->transfer_buffer = ctx->buf;
+        ctx->buf = (void *) ans;
+        ctx->buf_length = urb->actual_length;
+
+        state = ctx->state;
+        switch (state) {
+        case EZUSB_CTX_REQ_SUBMITTED:
+                /* We have received our response URB before
+                 * our request has been acknowledged. Do NOT
+                 * destroy our CTX yet, because our OUT URB
+                 * is still alive ...
+                 */
+                ctx->state = EZUSB_CTX_RESP_RECEIVED;
+                spin_unlock_irqrestore(&upriv->req_lock, flags);
+
+                /* Let the machine continue running. */
+                break;
+
+        case EZUSB_CTX_REQ_COMPLETE:
+                /* This is the usual path: our request
+                 * has already been acknowledged, and
+                 * we have now received the reply.
+                 */
+                ctx->state = EZUSB_CTX_COMPLETE;
+
+                /* Stop the intimer */
+                del_timer(&ctx->timer);
+                spin_unlock_irqrestore(&upriv->req_lock, flags);
+
+                /* Call the completion handler */
+                ezusb_ctx_complete(ctx);
+                break;
+
+        default:
+                spin_unlock_irqrestore(&upriv->req_lock, flags);
+
+                pr_warning("Matched IN URB, unexpected context state(0x%x)",
+                     state);
+                /* Throw this CTX away and try submitting another */
+                del_timer(&ctx->timer);
+                ctx->outurb->transfer_flags |= URB_ASYNC_UNLINK;
+                usb_unlink_urb(ctx->outurb);
+                ezusb_req_queue_run(upriv);
+                break;
+        }                       /* switch */
+}
+
+
+static void ezusb_req_ctx_wait(struct ezusb_priv *upriv,
+                               struct request_context *ctx)
+{
+        switch (ctx->state) {
+        case EZUSB_CTX_QUEUED:
+        case EZUSB_CTX_REQ_SUBMITTED:
+        case EZUSB_CTX_REQ_COMPLETE:
+        case EZUSB_CTX_RESP_RECEIVED:
+                if (in_softirq()) {
+                        /* If we get called from a timer, timeout timers don't
+                         * get the chance to run themselves. So we make sure
+                         * that we don't sleep for ever */
+                        int msecs = DEF_TIMEOUT * (1000 / HZ);
+                        while (!ctx->done.done && msecs--)
+                                udelay(1000);
+                } else {
+                        wait_event_interruptible(ctx->done.wait,
+                                                 ctx->done.done);
+                }
+                break;
+        default:
+                /* Done or failed - nothing to wait for */
+                break;
+        }
+}
+
+static inline u16 build_crc(struct ezusb_packet *data)
+{
+        u16 crc = 0;
+        u8 *bytes = (u8 *)data;
+        int i;
+
+        for (i = 0; i < 8; i++)
+                crc = (crc << 1) + bytes[i];
+
+        return crc;
+}
+
+/**
+ * ezusb_fill_req:
+ *
+ * if data == NULL and length > 0 the data is assumed to be already in
+ * the target buffer and only the header is filled.
+ *
+ */
+static int ezusb_fill_req(struct ezusb_packet *req, u16 length, u16 rid,
+                          const void *data, u16 frame_type, u8 reply_count)
+{
+        int total_size = sizeof(*req) + length;
+
+        BUG_ON(total_size > BULK_BUF_SIZE);
+
+        req->magic = cpu_to_le16(EZUSB_MAGIC);
+        req->req_reply_count = reply_count;
+        req->ans_reply_count = 0;
+        req->frame_type = cpu_to_le16(frame_type);
+        req->size = cpu_to_le16(length + 4);
+        req->crc = cpu_to_le16(build_crc(req));
+        req->hermes_len = cpu_to_le16(HERMES_BYTES_TO_RECLEN(length));
+        req->hermes_rid = cpu_to_le16(rid);
+        if (data)
+                memcpy(req->data, data, length);
+        return total_size;
+}
+
+static int ezusb_submit_in_urb(struct ezusb_priv *upriv)
+{
+        int retval = 0;
+        void *cur_buf = upriv->read_urb->transfer_buffer;
+
+        if (upriv->read_urb->status == -EINPROGRESS) {
+                dbg("urb busy, not resubmiting");
+                retval = -EBUSY;
+                goto exit;
+        }
+        usb_fill_bulk_urb(upriv->read_urb, upriv->udev, upriv->read_pipe,
+                          cur_buf, BULK_BUF_SIZE,
+                          ezusb_bulk_in_callback, upriv);
+        upriv->read_urb->transfer_flags = 0;
+        retval = usb_submit_urb(upriv->read_urb, GFP_ATOMIC);
+        if (retval)
+                err("%s submit failed %d", __func__, retval);
+
+ exit:
+        return retval;
+}
+
+static inline int ezusb_8051_cpucs(struct ezusb_priv *upriv, int reset)
+{
+        u8 res_val = reset;     /* avoid argument promotion */
+
+        if (!upriv->udev) {
+                err("%s: !upriv->udev", __func__);
+                return -EFAULT;
+        }
+        return usb_control_msg(upriv->udev,
+                               usb_sndctrlpipe(upriv->udev, 0),
+                               EZUSB_REQUEST_FW_TRANS,
+                               USB_TYPE_VENDOR | USB_RECIP_DEVICE |
+                               USB_DIR_OUT, EZUSB_CPUCS_REG, 0, &res_val,
+                               sizeof(res_val), DEF_TIMEOUT);
+}
+
+static int ezusb_firmware_download(struct ezusb_priv *upriv,
+                                   struct ez_usb_fw *fw)
+{
+        u8 fw_buffer[FW_BUF_SIZE];
+        int retval, addr;
+        int variant_offset;
+
+        /*
+         * This byte is 1 and should be replaced with 0.  The offset is
+         * 0x10AD in version 0.0.6.  The byte in question should follow
+         * the end of the code pointed to by the jump in the beginning
+         * of the firmware.  Also, it is read by code located at 0x358.
+         */
+        variant_offset = be16_to_cpup((__be16 *) &fw->code[FW_VAR_OFFSET_PTR]);
+        if (variant_offset >= fw->size) {
+                printk(KERN_ERR PFX "Invalid firmware variant offset: "
+                       "0x%04x\n", variant_offset);
+                retval = -EINVAL;
+                goto fail;
+        }
+
+        retval = ezusb_8051_cpucs(upriv, 1);
+        if (retval < 0)
+                goto fail;
+        for (addr = 0; addr < fw->size; addr += FW_BUF_SIZE) {
+                /* 0x100-0x300 should be left alone, it contains card
+                 * specific data, like USB enumeration information */
+                if ((addr >= FW_HOLE_START) && (addr < FW_HOLE_END))
+                        continue;
+
+                memcpy(fw_buffer, &fw->code[addr], FW_BUF_SIZE);
+                if (variant_offset >= addr &&
+                    variant_offset < addr + FW_BUF_SIZE) {
+                        dbg("Patching card_variant byte at 0x%04X",
+                            variant_offset);
+                        fw_buffer[variant_offset - addr] = FW_VAR_VALUE;
+                }
+                retval = usb_control_msg(upriv->udev,
+                                         usb_sndctrlpipe(upriv->udev, 0),
+                                         EZUSB_REQUEST_FW_TRANS,
+                                         USB_TYPE_VENDOR | USB_RECIP_DEVICE
+                                         | USB_DIR_OUT,
+                                         addr, 0x0,
+                                         fw_buffer, FW_BUF_SIZE,
+                                         DEF_TIMEOUT);
+
+                if (retval < 0)
+                        goto fail;
+        }
+        retval = ezusb_8051_cpucs(upriv, 0);
+        if (retval < 0)
+                goto fail;
+
+        goto exit;
+ fail:
+        printk(KERN_ERR PFX "Firmware download failed, error %d\n",
+               retval);
+ exit:
+        return retval;
+}
+
+static int ezusb_access_ltv(struct ezusb_priv *upriv,
+                            struct request_context *ctx,
+                            u16 length, const void *data, u16 frame_type,
+                            void *ans_buff, int ans_size, u16 *ans_length)
+{
+        int req_size;
+        int retval = 0;
+        enum ezusb_state state;
+
+        BUG_ON(in_irq());
+
+        if (!upriv->udev) {
+                dbg("Device disconnected");
+                return -ENODEV;
+        }
+
+        if (upriv->read_urb->status != -EINPROGRESS)
+                err("%s: in urb not pending", __func__);
+
+        /* protect upriv->reply_count, guarantee sequential numbers */
+        spin_lock_bh(&upriv->reply_count_lock);
+        req_size = ezusb_fill_req(ctx->buf, length, ctx->out_rid, data,
+                                  frame_type, upriv->reply_count);
+        usb_fill_bulk_urb(ctx->outurb, upriv->udev, upriv->write_pipe,
+                          ctx->buf, req_size,
+                          ezusb_request_out_callback, ctx);
+
+        if (ctx->in_rid)
+                upriv->reply_count = ezusb_reply_inc(upriv->reply_count);
+
+        ezusb_req_enqueue_run(upriv, ctx);
+
+        spin_unlock_bh(&upriv->reply_count_lock);
+
+        if (ctx->in_rid)
+                ezusb_req_ctx_wait(upriv, ctx);
+
+        state = ctx->state;
+        switch (state) {
+        case EZUSB_CTX_COMPLETE:
+                retval = ctx->outurb->status;
+                break;
+
+        case EZUSB_CTX_QUEUED:
+        case EZUSB_CTX_REQ_SUBMITTED:
+                if (!ctx->in_rid)
+                        break;
+        default:
+                err("%s: Unexpected context state %d", __func__,
+                    state);
+                /* fall though */
+        case EZUSB_CTX_REQ_TIMEOUT:
+        case EZUSB_CTX_REQ_FAILED:
+        case EZUSB_CTX_RESP_TIMEOUT:
+        case EZUSB_CTX_REQSUBMIT_FAIL:
+                printk(KERN_ERR PFX "Access failed, resetting (state %d,"
+                       " reply_count %d)\n", state, upriv->reply_count);
+                upriv->reply_count = 0;
+                if (state == EZUSB_CTX_REQ_TIMEOUT
+                    || state == EZUSB_CTX_RESP_TIMEOUT) {
+                        printk(KERN_ERR PFX "ctx timed out\n");
+                        retval = -ETIMEDOUT;
+                } else {
+                        printk(KERN_ERR PFX "ctx failed\n");
+                        retval = -EFAULT;
+                }
+                goto exit;
+                break;
+        }
+        if (ctx->in_rid) {
+                struct ezusb_packet *ans = ctx->buf;
+                int exp_len;
+
+                if (ans->hermes_len != 0)
+                        exp_len = le16_to_cpu(ans->hermes_len) * 2 + 12;
+                else
+                        exp_len = 14;
+
+                if (exp_len != ctx->buf_length) {
+                        err("%s: length mismatch for RID 0x%04x: "
+                            "expected %d, got %d", __func__,
+                            ctx->in_rid, exp_len, ctx->buf_length);
+                        retval = -EIO;
+                        goto exit;
+                }
+
+                if (ans_buff)
+                        memcpy(ans_buff, ans->data,
+                               min_t(int, exp_len, ans_size));
+                if (ans_length)
+                        *ans_length = le16_to_cpu(ans->hermes_len);
+        }
+ exit:
+        ezusb_request_context_put(ctx);
+        return retval;
+}
+
+static int ezusb_write_ltv(hermes_t *hw, int bap, u16 rid,
+                           u16 length, const void *data)
+{
+        struct ezusb_priv *upriv = hw->priv;
+        u16 frame_type;
+        struct request_context *ctx;
+
+        if (length == 0)
+                return -EINVAL;
+
+        length = HERMES_RECLEN_TO_BYTES(length);
+
+        /* On memory mapped devices HERMES_RID_CNFGROUPADDRESSES can be
+         * set to be empty, but the USB bridge doesn't like it */
+        if (length == 0)
+                return 0;
+
+        ctx = ezusb_alloc_ctx(upriv, rid, EZUSB_RID_ACK);
+        if (!ctx)
+                return -ENOMEM;
+
+        if (rid == EZUSB_RID_TX)
+                frame_type = EZUSB_FRAME_DATA;
+        else
+                frame_type = EZUSB_FRAME_CONTROL;
+
+        return ezusb_access_ltv(upriv, ctx, length, data, frame_type,
+                                NULL, 0, NULL);
+}
+
+static int ezusb_read_ltv(hermes_t *hw, int bap, u16 rid,
+                          unsigned bufsize, u16 *length, void *buf)
+{
+        struct ezusb_priv *upriv = hw->priv;
+        struct request_context *ctx;
+
+        if ((bufsize < 0) || (bufsize % 2))
+                return -EINVAL;
+
+        ctx = ezusb_alloc_ctx(upriv, rid, rid);
+        if (!ctx)
+                return -ENOMEM;
+
+        return ezusb_access_ltv(upriv, ctx, 0, NULL, EZUSB_FRAME_CONTROL,
+                                buf, bufsize, length);
+}
+
+static int ezusb_doicmd_wait(hermes_t *hw, u16 cmd, u16 parm0, u16 parm1,
+                             u16 parm2, struct hermes_response *resp)
+{
+        struct ezusb_priv *upriv = hw->priv;
+        struct request_context *ctx;
+
+        __le16 data[4] = {
+                cpu_to_le16(cmd),
+                cpu_to_le16(parm0),
+                cpu_to_le16(parm1),
+                cpu_to_le16(parm2),
+        };
+        dbg("0x%04X, parm0 0x%04X, parm1 0x%04X, parm2 0x%04X",
+            cmd, parm0, parm1, parm2);
+        ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_DOCMD, EZUSB_RID_ACK);
+        if (!ctx)
+                return -ENOMEM;
+
+        return ezusb_access_ltv(upriv, ctx, sizeof(data), &data,
+                                EZUSB_FRAME_CONTROL, NULL, 0, NULL);
+}
+
+static int ezusb_docmd_wait(hermes_t *hw, u16 cmd, u16 parm0,
+                            struct hermes_response *resp)
+{
+        struct ezusb_priv *upriv = hw->priv;
+        struct request_context *ctx;
+
+        __le16 data[4] = {
+                cpu_to_le16(cmd),
+                cpu_to_le16(parm0),
+                0,
+                0,
+        };
+        dbg("0x%04X, parm0 0x%04X", cmd, parm0);
+        ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_DOCMD, EZUSB_RID_ACK);
+        if (!ctx)
+                return -ENOMEM;
+
+        return ezusb_access_ltv(upriv, ctx, sizeof(data), &data,
+                                EZUSB_FRAME_CONTROL, NULL, 0, NULL);
+}
+
+static int ezusb_bap_pread(struct hermes *hw, int bap,
+                           void *buf, int len, u16 id, u16 offset)
+{
+        struct ezusb_priv *upriv = hw->priv;
+        struct ezusb_packet *ans = (void *) upriv->read_urb->transfer_buffer;
+        int actual_length = upriv->read_urb->actual_length;
+
+        if (id == EZUSB_RID_RX) {
+                if ((sizeof(*ans) + offset + len) > actual_length) {
+                        printk(KERN_ERR PFX "BAP read beyond buffer end "
+                               "in rx frame\n");
+                        return -EINVAL;
+                }
+                memcpy(buf, ans->data + offset, len);
+                return 0;
+        }
+
+        if (EZUSB_IS_INFO(id)) {
+                /* Include 4 bytes for length/type */
+                if ((sizeof(*ans) + offset + len - 4) > actual_length) {
+                        printk(KERN_ERR PFX "BAP read beyond buffer end "
+                               "in info frame\n");
+                        return -EFAULT;
+                }
+                memcpy(buf, ans->data + offset - 4, len);
+        } else {
+                printk(KERN_ERR PFX "Unexpected fid 0x%04x\n", id);
+                return -EINVAL;
+        }
+
+        return 0;
+}
+
+static int ezusb_read_pda(struct hermes *hw, __le16 *pda,
+                          u32 pda_addr, u16 pda_len)
+{
+        struct ezusb_priv *upriv = hw->priv;
+        struct request_context *ctx;
+        __le16 data[] = {
+                cpu_to_le16(pda_addr & 0xffff),
+                cpu_to_le16(pda_len - 4)
+        };
+        ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_READ_PDA, EZUSB_RID_READ_PDA);
+        if (!ctx)
+                return -ENOMEM;
+
+        /* wl_lkm does not include PDA size in the PDA area.
+         * We will pad the information into pda, so other routines
+         * don't have to be modified */
+        pda[0] = cpu_to_le16(pda_len - 2);
+        /* Includes CFG_PROD_DATA but not itself */
+        pda[1] = cpu_to_le16(0x0800); /* CFG_PROD_DATA */
+
+        return ezusb_access_ltv(upriv, ctx, sizeof(data), &data,
+                                EZUSB_FRAME_CONTROL, &pda[2], pda_len - 4,
+                                NULL);
+}
+
+static int ezusb_program_init(struct hermes *hw, u32 entry_point)
+{
+        struct ezusb_priv *upriv = hw->priv;
+        struct request_context *ctx;
+        __le32 data = cpu_to_le32(entry_point);
+
+        ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_PROG_INIT, EZUSB_RID_ACK);
+        if (!ctx)
+                return -ENOMEM;
+
+        return ezusb_access_ltv(upriv, ctx, sizeof(data), &data,
+                                EZUSB_FRAME_CONTROL, NULL, 0, NULL);
+}
+
+static int ezusb_program_end(struct hermes *hw)
+{
+        struct ezusb_priv *upriv = hw->priv;
+        struct request_context *ctx;
+
+        ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_PROG_END, EZUSB_RID_ACK);
+        if (!ctx)
+                return -ENOMEM;
+
+        return ezusb_access_ltv(upriv, ctx, 0, NULL,
+                                EZUSB_FRAME_CONTROL, NULL, 0, NULL);
+}
+
+static int ezusb_program_bytes(struct hermes *hw, const char *buf,
+                               u32 addr, u32 len)
+{
+        struct ezusb_priv *upriv = hw->priv;
+        struct request_context *ctx;
+        __le32 data = cpu_to_le32(addr);
+        int err;
+
+        ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_PROG_SET_ADDR, EZUSB_RID_ACK);
+        if (!ctx)
+                return -ENOMEM;
+
+        err = ezusb_access_ltv(upriv, ctx, sizeof(data), &data,
+                               EZUSB_FRAME_CONTROL, NULL, 0, NULL);
+        if (err)
+                return err;
+
+        ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_PROG_BYTES, EZUSB_RID_ACK);
+        if (!ctx)
+                return -ENOMEM;
+
+        return ezusb_access_ltv(upriv, ctx, len, buf,
+                                EZUSB_FRAME_CONTROL, NULL, 0, NULL);
+}
+
+static int ezusb_program(struct hermes *hw, const char *buf,
+                         u32 addr, u32 len)
+{
+        u32 ch_addr;
+        u32 ch_len;
+        int err = 0;
+
+        /* We can only send 2048 bytes out of the bulk xmit at a time,
+         * so we have to split any programming into chunks of <2048
+         * bytes. */
+
+        ch_len = (len < MAX_DL_SIZE) ? len : MAX_DL_SIZE;
+        ch_addr = addr;
+
+        while (ch_addr < (addr + len)) {
+                pr_debug("Programming subblock of length %d "
+                         "to address 0x%08x. Data @ %p\n",
+                         ch_len, ch_addr, &buf[ch_addr - addr]);
+
+                err = ezusb_program_bytes(hw, &buf[ch_addr - addr],
+                                          ch_addr, ch_len);
+                if (err)
+                        break;
+
+                ch_addr += ch_len;
+                ch_len = ((addr + len - ch_addr) < MAX_DL_SIZE) ?
+                        (addr + len - ch_addr) : MAX_DL_SIZE;
+        }
+
+        return err;
+}
+
+static netdev_tx_t ezusb_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+        struct orinoco_private *priv = ndev_priv(dev);
+        struct net_device_stats *stats = &priv->stats;
+        struct ezusb_priv *upriv = priv->card;
+        u8 mic[MICHAEL_MIC_LEN+1];
+        int err = 0;
+        int tx_control;
+        unsigned long flags;
+        struct request_context *ctx;
+        u8 *buf;
+        int tx_size;
+
+        if (!netif_running(dev)) {
+                printk(KERN_ERR "%s: Tx on stopped device!\n",
+                       dev->name);
+                return NETDEV_TX_BUSY;
+        }
+
+        if (netif_queue_stopped(dev)) {
+                printk(KERN_DEBUG "%s: Tx while transmitter busy!\n",
+                       dev->name);
+                return NETDEV_TX_BUSY;
+        }
+
+        if (orinoco_lock(priv, &flags) != 0) {
+                printk(KERN_ERR
+                       "%s: ezusb_xmit() called while hw_unavailable\n",
+                       dev->name);
+                return NETDEV_TX_BUSY;
+        }
+
+        if (!netif_carrier_ok(dev) ||
+            (priv->iw_mode == NL80211_IFTYPE_MONITOR)) {
+                /* Oops, the firmware hasn't established a connection,
+                   silently drop the packet (this seems to be the
+                   safest approach). */
+                goto drop;
+        }
+
+        /* Check packet length */
+        if (skb->len < ETH_HLEN)
+                goto drop;
+
+        ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_TX, 0);
+        if (!ctx)
+                goto busy;
+
+        memset(ctx->buf, 0, BULK_BUF_SIZE);
+        buf = ctx->buf->data;
+
+        tx_control = 0;
+
+        err = orinoco_process_xmit_skb(skb, dev, priv, &tx_control,
+                                       &mic[0]);
+        if (err)
+                goto drop;
+
+        {
+                __le16 *tx_cntl = (__le16 *)buf;
+                *tx_cntl = cpu_to_le16(tx_control);
+                buf += sizeof(*tx_cntl);
+        }
+
+        memcpy(buf, skb->data, skb->len);
+        buf += skb->len;
+
+        if (tx_control & HERMES_TXCTRL_MIC) {
+                u8 *m = mic;
+                /* Mic has been offset so it can be copied to an even
+                 * address. We're copying eveything anyway, so we
+                 * don't need to copy that first byte. */
+                if (skb->len % 2)
+                        m++;
+                memcpy(buf, m, MICHAEL_MIC_LEN);
+                buf += MICHAEL_MIC_LEN;
+        }
+
+        /* Finally, we actually initiate the send */
+        netif_stop_queue(dev);
+
+        /* The card may behave better if we send evenly sized usb transfers */
+        tx_size = ALIGN(buf - ctx->buf->data, 2);
+
+        err = ezusb_access_ltv(upriv, ctx, tx_size, NULL,
+                               EZUSB_FRAME_DATA, NULL, 0, NULL);
+
+        if (err) {
+                netif_start_queue(dev);
+                if (net_ratelimit())
+                        printk(KERN_ERR "%s: Error %d transmitting packet\n",
+                                dev->name, err);
+                goto busy;
+        }
+
+        dev->trans_start = jiffies;
+        stats->tx_bytes += skb->len;
+        goto ok;
+
+ drop:
+        stats->tx_errors++;
+        stats->tx_dropped++;
+
+ ok:
+        orinoco_unlock(priv, &flags);
+        dev_kfree_skb(skb);
+        return NETDEV_TX_OK;
+
+ busy:
+        orinoco_unlock(priv, &flags);
+        return NETDEV_TX_BUSY;
+}
+
+static int ezusb_allocate(struct hermes *hw, u16 size, u16 *fid)
+{
+        *fid = EZUSB_RID_TX;
+        return 0;
+}
+
+
+static int ezusb_hard_reset(struct orinoco_private *priv)
+{
+        struct ezusb_priv *upriv = priv->card;
+        int retval = ezusb_8051_cpucs(upriv, 1);
+
+        if (retval < 0) {
+                err("Failed to reset");
+                return retval;
+        }
+
+        retval = ezusb_8051_cpucs(upriv, 0);
+        if (retval < 0) {
+                err("Failed to unreset");
+                return retval;
+        }
+
+        dbg("sending control message");
+        retval = usb_control_msg(upriv->udev,
+                                 usb_sndctrlpipe(upriv->udev, 0),
+                                 EZUSB_REQUEST_TRIGER,
+                                 USB_TYPE_VENDOR | USB_RECIP_DEVICE |
+                                 USB_DIR_OUT, 0x0, 0x0, NULL, 0,
+                                 DEF_TIMEOUT);
+        if (retval < 0) {
+                err("EZUSB_REQUEST_TRIGER failed retval %d", retval);
+                return retval;
+        }
+#if 0
+        dbg("Sending EZUSB_REQUEST_TRIG_AC");
+        retval = usb_control_msg(upriv->udev,
+                                 usb_sndctrlpipe(upriv->udev, 0),
+                                 EZUSB_REQUEST_TRIG_AC,
+                                 USB_TYPE_VENDOR | USB_RECIP_DEVICE |
+                                 USB_DIR_OUT, 0x00FA, 0x0, NULL, 0,
+                                 DEF_TIMEOUT);
+        if (retval < 0) {
+                err("EZUSB_REQUEST_TRIG_AC failed retval %d", retval);
+                return retval;
+        }
+#endif
+
+        return 0;
+}
+
+
+static int ezusb_init(hermes_t *hw)
+{
+        struct ezusb_priv *upriv = hw->priv;
+        int retval;
+
+        BUG_ON(in_interrupt());
+        BUG_ON(!upriv);
+
+        upriv->reply_count = 0;
+        /* Write the MAGIC number on the simulated registers to keep
+         * orinoco.c happy */
+        hermes_write_regn(hw, SWSUPPORT0, HERMES_MAGIC);
+        hermes_write_regn(hw, RXFID, EZUSB_RID_RX);
+
+        usb_kill_urb(upriv->read_urb);
+        ezusb_submit_in_urb(upriv);
+
+        retval = ezusb_write_ltv(hw, 0, EZUSB_RID_INIT1,
+                                 HERMES_BYTES_TO_RECLEN(2), "\x10\x00");
+        if (retval < 0) {
+                printk(KERN_ERR PFX "EZUSB_RID_INIT1 error %d\n", retval);
+                return retval;
+        }
+
+        retval = ezusb_docmd_wait(hw, HERMES_CMD_INIT, 0, NULL);
+        if (retval < 0) {
+                printk(KERN_ERR PFX "HERMES_CMD_INIT error %d\n", retval);
+                return retval;
+        }
+
+        return 0;
+}
+
+static void ezusb_bulk_in_callback(struct urb *urb)
+{
+        struct ezusb_priv *upriv = (struct ezusb_priv *) urb->context;
+        struct ezusb_packet *ans = urb->transfer_buffer;
+        u16 crc;
+        u16 hermes_rid;
+
+        if (upriv->udev == NULL) {
+                dbg("disconnected");
+                return;
+        }
+
+        if (urb->status == -ETIMEDOUT) {
+                /* When a device gets unplugged we get this every time
+                 * we resubmit, flooding the logs.  Since we don't use
+                 * USB timeouts, it shouldn't happen any other time*/
+                pr_warning("%s: urb timed out, not resubmiting", __func__);
+                return;
+        }
+        if (urb->status == -ECONNABORTED) {
+                pr_warning("%s: connection abort, resubmiting urb",
+                     __func__);
+                goto resubmit;
+        }
+        if ((urb->status == -EILSEQ)
+            || (urb->status == -ENOENT)
+            || (urb->status == -ECONNRESET)) {
+                dbg("status %d, not resubmiting", urb->status);
+                return;
+        }
+        if (urb->status)
+                dbg("status: %d length: %d",
+                    urb->status, urb->actual_length);
+        if (urb->actual_length < sizeof(*ans)) {
+                err("%s: short read, ignoring", __func__);
+                goto resubmit;
+        }
+        crc = build_crc(ans);
+        if (le16_to_cpu(ans->crc) != crc) {
+                err("CRC error, ignoring packet");
+                goto resubmit;
+        }
+
+        hermes_rid = le16_to_cpu(ans->hermes_rid);
+        if ((hermes_rid != EZUSB_RID_RX) && !EZUSB_IS_INFO(hermes_rid)) {
+                ezusb_request_in_callback(upriv, urb);
+        } else if (upriv->dev) {
+                struct net_device *dev = upriv->dev;
+                struct orinoco_private *priv = ndev_priv(dev);
+                hermes_t *hw = &priv->hw;
+
+                if (hermes_rid == EZUSB_RID_RX) {
+                        __orinoco_ev_rx(dev, hw);
+                } else {
+                        hermes_write_regn(hw, INFOFID,
+                                          le16_to_cpu(ans->hermes_rid));
+                        __orinoco_ev_info(dev, hw);
+                }
+        }
+
+ resubmit:
+        if (upriv->udev)
+                ezusb_submit_in_urb(upriv);
+}
+
+static inline void ezusb_delete(struct ezusb_priv *upriv)
+{
+        struct net_device *dev;
+        struct list_head *item;
+        struct list_head *tmp_item;
+        unsigned long flags;
+
+        BUG_ON(in_interrupt());
+        BUG_ON(!upriv);
+
+        dev = upriv->dev;
+        mutex_lock(&upriv->mtx);
+
+        upriv->udev = NULL;     /* No timer will be rearmed from here */
+
+        usb_kill_urb(upriv->read_urb);
+
+        spin_lock_irqsave(&upriv->req_lock, flags);
+        list_for_each_safe(item, tmp_item, &upriv->req_active) {
+                struct request_context *ctx;
+                int err;
+
+                ctx = list_entry(item, struct request_context, list);
+                atomic_inc(&ctx->refcount);
+
+                ctx->outurb->transfer_flags |= URB_ASYNC_UNLINK;
+                err = usb_unlink_urb(ctx->outurb);
+
+                spin_unlock_irqrestore(&upriv->req_lock, flags);
+                if (err == -EINPROGRESS)
+                        wait_for_completion(&ctx->done);
+
+                del_timer_sync(&ctx->timer);
+                /* FIXME: there is an slight chance for the irq handler to
+                 * be running */
+                if (!list_empty(&ctx->list))
+                        ezusb_ctx_complete(ctx);
+
+                ezusb_request_context_put(ctx);
+                spin_lock_irqsave(&upriv->req_lock, flags);
+        }
+        spin_unlock_irqrestore(&upriv->req_lock, flags);
+
+        list_for_each_safe(item, tmp_item, &upriv->req_pending)
+            ezusb_ctx_complete(list_entry(item,
+                                          struct request_context, list));
+
+        if (upriv->read_urb && upriv->read_urb->status == -EINPROGRESS)
+                printk(KERN_ERR PFX "Some URB in progress\n");
+
+        mutex_unlock(&upriv->mtx);
+
+        if (upriv->read_urb) {
+                kfree(upriv->read_urb->transfer_buffer);
+                usb_free_urb(upriv->read_urb);
+        }
+        kfree(upriv->bap_buf);
+        if (upriv->dev) {
+                struct orinoco_private *priv = ndev_priv(upriv->dev);
+                orinoco_if_del(priv);
+                free_orinocodev(priv);
+        }
+}
+
+static void ezusb_lock_irqsave(spinlock_t *lock,
+                               unsigned long *flags) __acquires(lock)
+{
+        spin_lock_bh(lock);
+}
+
+static void ezusb_unlock_irqrestore(spinlock_t *lock,
+                                    unsigned long *flags) __releases(lock)
+{
+        spin_unlock_bh(lock);
+}
+
+static void ezusb_lock_irq(spinlock_t *lock) __acquires(lock)
+{
+        spin_lock_bh(lock);
+}
+
+static void ezusb_unlock_irq(spinlock_t *lock) __releases(lock)
+{
+        spin_unlock_bh(lock);
+}
+
+static const struct hermes_ops ezusb_ops = {
+        .init = ezusb_init,
+        .cmd_wait = ezusb_docmd_wait,
+        .init_cmd_wait = ezusb_doicmd_wait,
+        .allocate = ezusb_allocate,
+        .read_ltv = ezusb_read_ltv,
+        .write_ltv = ezusb_write_ltv,
+        .bap_pread = ezusb_bap_pread,
+        .read_pda_h = ezusb_read_pda,
+        .program_init = ezusb_program_init,
+        .program_end = ezusb_program_end,
+        .program = ezusb_program,
+        .lock_irqsave = ezusb_lock_irqsave,
+        .unlock_irqrestore = ezusb_unlock_irqrestore,
+        .lock_irq = ezusb_lock_irq,
+        .unlock_irq = ezusb_unlock_irq,
+};
+
+static const struct net_device_ops ezusb_netdev_ops = {
+        .ndo_open               = orinoco_open,
+        .ndo_stop               = orinoco_stop,
+        .ndo_start_xmit         = ezusb_xmit,
+        .ndo_set_multicast_list = orinoco_set_multicast_list,
+        .ndo_change_mtu         = orinoco_change_mtu,
+        .ndo_set_mac_address    = eth_mac_addr,
+        .ndo_validate_addr      = eth_validate_addr,
+        .ndo_tx_timeout         = orinoco_tx_timeout,
+        .ndo_get_stats          = orinoco_get_stats,
+};
+
+static int ezusb_probe(struct usb_interface *interface,
+                       const struct usb_device_id *id)
+{
+        struct usb_device *udev = interface_to_usbdev(interface);
+        struct orinoco_private *priv;
+        hermes_t *hw;
+        struct ezusb_priv *upriv = NULL;
+        struct usb_interface_descriptor *iface_desc;
+        struct usb_endpoint_descriptor *ep;
+        const struct firmware *fw_entry;
+        int retval = 0;
+        int i;
+
+        priv = alloc_orinocodev(sizeof(*upriv), &udev->dev,
+                                ezusb_hard_reset, NULL);
+        if (!priv) {
+                err("Couldn't allocate orinocodev");
+                goto exit;
+        }
+
+        hw = &priv->hw;
+
+        upriv = priv->card;
+
+        mutex_init(&upriv->mtx);
+        spin_lock_init(&upriv->reply_count_lock);
+
+        spin_lock_init(&upriv->req_lock);
+        INIT_LIST_HEAD(&upriv->req_pending);
+        INIT_LIST_HEAD(&upriv->req_active);
+
+        upriv->udev = udev;
+
+        hw->iobase = (void __force __iomem *) &upriv->hermes_reg_fake;
+        hw->reg_spacing = HERMES_16BIT_REGSPACING;
+        hw->priv = upriv;
+        hw->ops = &ezusb_ops;
+
+        /* set up the endpoint information */
+        /* check out the endpoints */
+
+        iface_desc = &interface->altsetting[0].desc;
+        for (i = 0; i < iface_desc->bNumEndpoints; ++i) {
+                ep = &interface->altsetting[0].endpoint[i].desc;
+
+                if (((ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
+                     == USB_DIR_IN) &&
+                    ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
+                     == USB_ENDPOINT_XFER_BULK)) {
+                        /* we found a bulk in endpoint */
+                        if (upriv->read_urb != NULL) {
+                                pr_warning("Found a second bulk in ep, ignored");
+                                continue;
+                        }
+
+                        upriv->read_urb = usb_alloc_urb(0, GFP_KERNEL);
+                        if (!upriv->read_urb) {
+                                err("No free urbs available");
+                                goto error;
+                        }
+                        if (le16_to_cpu(ep->wMaxPacketSize) != 64)
+                                pr_warning("bulk in: wMaxPacketSize!= 64");
+                        if (ep->bEndpointAddress != (2 | USB_DIR_IN))
+                                pr_warning("bulk in: bEndpointAddress: %d",
+                                     ep->bEndpointAddress);
+                        upriv->read_pipe = usb_rcvbulkpipe(udev,
+                                                         ep->
+                                                         bEndpointAddress);
+                        upriv->read_urb->transfer_buffer =
+                            kmalloc(BULK_BUF_SIZE, GFP_KERNEL);
+                        if (!upriv->read_urb->transfer_buffer) {
+                                err("Couldn't allocate IN buffer");
+                                goto error;
+                        }
+                }
+
+                if (((ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
+                     == USB_DIR_OUT) &&
+                    ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
+                     == USB_ENDPOINT_XFER_BULK)) {
+                        /* we found a bulk out endpoint */
+                        if (upriv->bap_buf != NULL) {
+                                pr_warning("Found a second bulk out ep, ignored");
+                                continue;
+                        }
+
+                        if (le16_to_cpu(ep->wMaxPacketSize) != 64)
+                                pr_warning("bulk out: wMaxPacketSize != 64");
+                        if (ep->bEndpointAddress != 2)
+                                pr_warning("bulk out: bEndpointAddress: %d",
+                                     ep->bEndpointAddress);
+                        upriv->write_pipe = usb_sndbulkpipe(udev,
+                                                          ep->
+                                                          bEndpointAddress);
+                        upriv->bap_buf = kmalloc(BULK_BUF_SIZE, GFP_KERNEL);
+                        if (!upriv->bap_buf) {
+                                err("Couldn't allocate bulk_out_buffer");
+                                goto error;
+                        }
+                }
+        }
+        if (!upriv->bap_buf || !upriv->read_urb) {
+                err("Didn't find the required bulk endpoints");
+                goto error;
+        }
+
+        if (request_firmware(&fw_entry, "orinoco_ezusb_fw",
+                             &interface->dev) == 0) {
+                firmware.size = fw_entry->size;
+                firmware.code = fw_entry->data;
+        }
+        if (firmware.size && firmware.code) {
+                ezusb_firmware_download(upriv, &firmware);
+        } else {
+                err("No firmware to download");
+                goto error;
+        }
+
+        if (ezusb_hard_reset(priv) < 0) {
+                err("Cannot reset the device");
+                goto error;
+        }
+
+        /* If the firmware is already downloaded orinoco.c will call
+         * ezusb_init but if the firmware is not already there, that will make
+         * the kernel very unstable, so we try initializing here and quit in
+         * case of error */
+        if (ezusb_init(hw) < 0) {
+                err("Couldn't initialize the device");
+                err("Firmware may not be downloaded or may be wrong.");
+                goto error;
+        }
+
+        /* Initialise the main driver */
+        if (orinoco_init(priv) != 0) {
+                err("orinoco_init() failed\n");
+                goto error;
+        }
+
+        if (orinoco_if_add(priv, 0, 0, &ezusb_netdev_ops) != 0) {
+                upriv->dev = NULL;
+                err("%s: orinoco_if_add() failed", __func__);
+                goto error;
+        }
+        upriv->dev = priv->ndev;
+
+        goto exit;
+
+ error:
+        ezusb_delete(upriv);
+        if (upriv->dev) {
+                /* upriv->dev was 0, so ezusb_delete() didn't free it */
+                free_orinocodev(priv);
+        }
+        upriv = NULL;
+        retval = -EFAULT;
+ exit:
+        if (fw_entry) {
+                firmware.code = NULL;
+                firmware.size = 0;
+                release_firmware(fw_entry);
+        }
+        usb_set_intfdata(interface, upriv);
+        return retval;
+}
+
+
+static void ezusb_disconnect(struct usb_interface *intf)
+{
+        struct ezusb_priv *upriv = usb_get_intfdata(intf);
+        usb_set_intfdata(intf, NULL);
+        ezusb_delete(upriv);
+        printk(KERN_INFO PFX "Disconnected\n");
+}
+
+
+/* usb specific object needed to register this driver with the usb subsystem */
+static struct usb_driver orinoco_driver = {
+        .name = DRIVER_NAME,
+        .probe = ezusb_probe,
+        .disconnect = ezusb_disconnect,
+        .id_table = ezusb_table,
+};
+
+/* Can't be declared "const" or the whole __initdata section will
+ * become const */
+static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
+    " (Manuel Estrada Sainz)";
+
+static int __init ezusb_module_init(void)
+{
+        int err;
+
+        printk(KERN_DEBUG "%s\n", version);
+
+        /* register this driver with the USB subsystem */
+        err = usb_register(&orinoco_driver);
+        if (err < 0) {
+                printk(KERN_ERR PFX "usb_register failed, error %d\n",
+                       err);
+                return err;
+        }
+
+        return 0;
+}
+
+static void __exit ezusb_module_exit(void)
+{
+        /* deregister this driver with the USB subsystem */
+        usb_deregister(&orinoco_driver);
+}
+
+
+module_init(ezusb_module_init);
+module_exit(ezusb_module_exit);
+
+MODULE_AUTHOR("Manuel Estrada Sainz");
+MODULE_DESCRIPTION
+    ("Driver for Orinoco wireless LAN cards using EZUSB bridge");
+MODULE_LICENSE("Dual MPL/GPL");