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main.c

/* main.c - (formerly known as dldwd_cs.c, orinoco_cs.c and orinoco.c)
 *
 * A driver for Hermes or Prism 2 chipset based PCMCIA wireless
 * adaptors, with Lucent/Agere, Intersil or Symbol firmware.
 *
 * Current maintainers (as of 29 September 2003) are:
 *    Pavel Roskin <proski AT gnu.org>
 * and      David Gibson <hermes AT gibson.dropbear.id.au>
 *
 * (C) Copyright David Gibson, IBM Corporation 2001-2003.
 * Copyright (C) 2000 David Gibson, Linuxcare Australia.
 *    With some help from :
 * Copyright (C) 2001 Jean Tourrilhes, HP Labs
 * Copyright (C) 2001 Benjamin Herrenschmidt
 *
 * Based on dummy_cs.c 1.27 2000/06/12 21:27:25
 *
 * Portions based on wvlan_cs.c 1.0.6, Copyright Andreas Neuhaus <andy
 * AT fasta.fh-dortmund.de>
 *      http://www.stud.fh-dortmund.de/~andy/wvlan/
 *
 * 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.
 *
 * The initial developer of the original code is David A. Hinds
 * <dahinds AT users.sourceforge.net>.  Portions created by David
 * A. Hinds are Copyright (C) 1999 David A. Hinds.  All Rights
 * Reserved.
 *
 * 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.  */

/*
 * TODO
 *    o Handle de-encapsulation within network layer, provide 802.11
 *      headers (patch from Thomas 'Dent' Mirlacher)
 *    o Fix possible races in SPY handling.
 *    o Disconnect wireless extensions from fundamental configuration.
 *    o (maybe) Software WEP support (patch from Stano Meduna).
 *    o (maybe) Use multiple Tx buffers - driver handling queue
 *      rather than firmware.
 */

/* Locking and synchronization:
 *
 * The basic principle is that everything is serialized through a
 * single spinlock, priv->lock.  The lock is used in user, bh and irq
 * context, so when taken outside hardirq context it should always be
 * taken with interrupts disabled.  The lock protects both the
 * hardware and the struct orinoco_private.
 *
 * Another flag, priv->hw_unavailable indicates that the hardware is
 * unavailable for an extended period of time (e.g. suspended, or in
 * the middle of a hard reset).  This flag is protected by the
 * spinlock.  All code which touches the hardware should check the
 * flag after taking the lock, and if it is set, give up on whatever
 * they are doing and drop the lock again.  The orinoco_lock()
 * function handles this (it unlocks and returns -EBUSY if
 * hw_unavailable is non-zero).
 */

#define DRIVER_NAME "orinoco"

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/suspend.h>
#include <linux/if_arp.h>
#include <linux/wireless.h>
#include <linux/ieee80211.h>
#include <net/iw_handler.h>

#include "hermes_rid.h"
#include "hermes_dld.h"
#include "hw.h"
#include "scan.h"
#include "mic.h"
#include "fw.h"
#include "wext.h"
#include "main.h"

#include "orinoco.h"

/********************************************************************/
/* Module information                                               */
/********************************************************************/

MODULE_AUTHOR("Pavel Roskin <proski@gnu.org> & "
            "David Gibson <hermes@gibson.dropbear.id.au>");
MODULE_DESCRIPTION("Driver for Lucent Orinoco, Prism II based "
               "and similar wireless cards");
MODULE_LICENSE("Dual MPL/GPL");

/* Level of debugging. Used in the macros in orinoco.h */
#ifdef ORINOCO_DEBUG
int orinoco_debug = ORINOCO_DEBUG;
EXPORT_SYMBOL(orinoco_debug);
module_param(orinoco_debug, int, 0644);
MODULE_PARM_DESC(orinoco_debug, "Debug level");
#endif

static int suppress_linkstatus; /* = 0 */
module_param(suppress_linkstatus, bool, 0644);
MODULE_PARM_DESC(suppress_linkstatus, "Don't log link status changes");

static int ignore_disconnect; /* = 0 */
module_param(ignore_disconnect, int, 0644);
MODULE_PARM_DESC(ignore_disconnect,
             "Don't report lost link to the network layer");

int force_monitor; /* = 0 */
module_param(force_monitor, int, 0644);
MODULE_PARM_DESC(force_monitor, "Allow monitor mode for all firmware versions");

/********************************************************************/
/* Internal constants                                               */
/********************************************************************/

/* 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)

#define ORINOCO_MIN_MTU       256
#define ORINOCO_MAX_MTU       (IEEE80211_MAX_DATA_LEN - ENCAPS_OVERHEAD)

#define SYMBOL_MAX_VER_LEN    (14)
#define MAX_IRQLOOPS_PER_IRQ  10
#define MAX_IRQLOOPS_PER_JIFFY      (20000/HZ) /* Based on a guestimate of
                                  * how many events the
                                  * device could
                                  * legitimately generate */
#define TX_NICBUF_SIZE_BUG    1585        /* Bug in Symbol firmware */

#define DUMMY_FID       0xFFFF

/*#define MAX_MULTICAST(priv) (priv->firmware_type == FIRMWARE_TYPE_AGERE ? \
  HERMES_MAX_MULTICAST : 0)*/
#define MAX_MULTICAST(priv)   (HERMES_MAX_MULTICAST)

#define ORINOCO_INTEN         (HERMES_EV_RX | HERMES_EV_ALLOC \
                         | HERMES_EV_TX | HERMES_EV_TXEXC \
                         | HERMES_EV_WTERR | HERMES_EV_INFO \
                         | HERMES_EV_INFDROP)

static const struct ethtool_ops orinoco_ethtool_ops;

/********************************************************************/
/* Data types                                                       */
/********************************************************************/

/* Beginning of the Tx descriptor, used in TxExc handling */
00171 struct hermes_txexc_data {
      struct hermes_tx_descriptor desc;
      __le16 frame_ctl;
      __le16 duration_id;
      u8 addr1[ETH_ALEN];
} __attribute__ ((packed));

/* Rx frame header except compatibility 802.3 header */
00179 struct hermes_rx_descriptor {
      /* Control */
      __le16 status;
      __le32 time;
      u8 silence;
      u8 signal;
      u8 rate;
      u8 rxflow;
      __le32 reserved;

      /* 802.11 header */
      __le16 frame_ctl;
      __le16 duration_id;
      u8 addr1[ETH_ALEN];
      u8 addr2[ETH_ALEN];
      u8 addr3[ETH_ALEN];
      __le16 seq_ctl;
      u8 addr4[ETH_ALEN];

      /* Data length */
      __le16 data_len;
} __attribute__ ((packed));

00202 struct orinoco_rx_data {
      struct hermes_rx_descriptor *desc;
      struct sk_buff *skb;
      struct list_head list;
};

/********************************************************************/
/* Function prototypes                                              */
/********************************************************************/

static void __orinoco_set_multicast_list(struct net_device *dev);

/********************************************************************/
/* Internal helper functions                                        */
/********************************************************************/

void set_port_type(struct orinoco_private *priv)
{
      switch (priv->iw_mode) {
      case IW_MODE_INFRA:
            priv->port_type = 1;
            priv->createibss = 0;
            break;
      case IW_MODE_ADHOC:
            if (priv->prefer_port3) {
                  priv->port_type = 3;
                  priv->createibss = 0;
            } else {
                  priv->port_type = priv->ibss_port;
                  priv->createibss = 1;
            }
            break;
      case IW_MODE_MONITOR:
            priv->port_type = 3;
            priv->createibss = 0;
            break;
      default:
            printk(KERN_ERR "%s: Invalid priv->iw_mode in set_port_type()\n",
                   priv->ndev->name);
      }
}

/********************************************************************/
/* Device methods                                                   */
/********************************************************************/

static int orinoco_open(struct net_device *dev)
{
      struct orinoco_private *priv = netdev_priv(dev);
      unsigned long flags;
      int err;

      if (orinoco_lock(priv, &flags) != 0)
            return -EBUSY;

      err = __orinoco_up(dev);

      if (!err)
            priv->open = 1;

      orinoco_unlock(priv, &flags);

      return err;
}

static int orinoco_stop(struct net_device *dev)
{
      struct orinoco_private *priv = netdev_priv(dev);
      int err = 0;

      /* We mustn't use orinoco_lock() here, because we need to be
         able to close the interface even if hw_unavailable is set
         (e.g. as we're released after a PC Card removal) */
      spin_lock_irq(&priv->lock);

      priv->open = 0;

      err = __orinoco_down(dev);

      spin_unlock_irq(&priv->lock);

      return err;
}

static struct net_device_stats *orinoco_get_stats(struct net_device *dev)
{
      struct orinoco_private *priv = netdev_priv(dev);

      return &priv->stats;
}

static void orinoco_set_multicast_list(struct net_device *dev)
{
      struct orinoco_private *priv = netdev_priv(dev);
      unsigned long flags;

      if (orinoco_lock(priv, &flags) != 0) {
            printk(KERN_DEBUG "%s: orinoco_set_multicast_list() "
                   "called when hw_unavailable\n", dev->name);
            return;
      }

      __orinoco_set_multicast_list(dev);
      orinoco_unlock(priv, &flags);
}

static int orinoco_change_mtu(struct net_device *dev, int new_mtu)
{
      struct orinoco_private *priv = netdev_priv(dev);

      if ((new_mtu < ORINOCO_MIN_MTU) || (new_mtu > ORINOCO_MAX_MTU))
            return -EINVAL;

      /* MTU + encapsulation + header length */
      if ((new_mtu + ENCAPS_OVERHEAD + sizeof(struct ieee80211_hdr)) >
           (priv->nicbuf_size - ETH_HLEN))
            return -EINVAL;

      dev->mtu = new_mtu;

      return 0;
}

/********************************************************************/
/* Tx path                                                          */
/********************************************************************/

static int orinoco_xmit(struct sk_buff *skb, struct net_device *dev)
{
      struct orinoco_private *priv = netdev_priv(dev);
      struct net_device_stats *stats = &priv->stats;
      hermes_t *hw = &priv->hw;
      int err = 0;
      u16 txfid = priv->txfid;
      struct ethhdr *eh;
      int tx_control;
      unsigned long flags;

      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: orinoco_xmit() called while hw_unavailable\n",
                   dev->name);
            return NETDEV_TX_BUSY;
      }

      if (!netif_carrier_ok(dev) || (priv->iw_mode == IW_MODE_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;

      tx_control = HERMES_TXCTRL_TX_OK | HERMES_TXCTRL_TX_EX;

      if (priv->encode_alg == IW_ENCODE_ALG_TKIP)
            tx_control |= (priv->tx_key << HERMES_MIC_KEY_ID_SHIFT) |
                  HERMES_TXCTRL_MIC;

      if (priv->has_alt_txcntl) {
            /* WPA enabled firmwares have tx_cntl at the end of
             * the 802.11 header.  So write zeroed descriptor and
             * 802.11 header at the same time
             */
            char desc[HERMES_802_3_OFFSET];
            __le16 *txcntl = (__le16 *) &desc[HERMES_TXCNTL2_OFFSET];

            memset(&desc, 0, sizeof(desc));

            *txcntl = cpu_to_le16(tx_control);
            err = hermes_bap_pwrite(hw, USER_BAP, &desc, sizeof(desc),
                              txfid, 0);
            if (err) {
                  if (net_ratelimit())
                        printk(KERN_ERR "%s: Error %d writing Tx "
                               "descriptor to BAP\n", dev->name, err);
                  goto busy;
            }
      } else {
            struct hermes_tx_descriptor desc;

            memset(&desc, 0, sizeof(desc));

            desc.tx_control = cpu_to_le16(tx_control);
            err = hermes_bap_pwrite(hw, USER_BAP, &desc, sizeof(desc),
                              txfid, 0);
            if (err) {
                  if (net_ratelimit())
                        printk(KERN_ERR "%s: Error %d writing Tx "
                               "descriptor to BAP\n", dev->name, err);
                  goto busy;
            }

            /* Clear the 802.11 header and data length fields - some
             * firmwares (e.g. Lucent/Agere 8.xx) appear to get confused
             * if this isn't done. */
            hermes_clear_words(hw, HERMES_DATA0,
                           HERMES_802_3_OFFSET - HERMES_802_11_OFFSET);
      }

      eh = (struct ethhdr *)skb->data;

      /* Encapsulate Ethernet-II frames */
      if (ntohs(eh->h_proto) > ETH_DATA_LEN) { /* Ethernet-II frame */
            struct header_struct {
                  struct ethhdr eth;      /* 802.3 header */
                  u8 encap[6];            /* 802.2 header */
            } __attribute__ ((packed)) hdr;

            /* Strip destination and source from the data */
            skb_pull(skb, 2 * ETH_ALEN);

            /* And move them to a separate header */
            memcpy(&hdr.eth, eh, 2 * ETH_ALEN);
            hdr.eth.h_proto = htons(sizeof(encaps_hdr) + skb->len);
            memcpy(hdr.encap, encaps_hdr, sizeof(encaps_hdr));

            /* Insert the SNAP header */
            if (skb_headroom(skb) < sizeof(hdr)) {
                  printk(KERN_ERR
                         "%s: Not enough headroom for 802.2 headers %d\n",
                         dev->name, skb_headroom(skb));
                  goto drop;
            }
            eh = (struct ethhdr *) skb_push(skb, sizeof(hdr));
            memcpy(eh, &hdr, sizeof(hdr));
      }

      err = hermes_bap_pwrite(hw, USER_BAP, skb->data, skb->len,
                        txfid, HERMES_802_3_OFFSET);
      if (err) {
            printk(KERN_ERR "%s: Error %d writing packet to BAP\n",
                   dev->name, err);
            goto busy;
      }

      /* Calculate Michael MIC */
      if (priv->encode_alg == IW_ENCODE_ALG_TKIP) {
            u8 mic_buf[MICHAEL_MIC_LEN + 1];
            u8 *mic;
            size_t offset;
            size_t len;

            if (skb->len % 2) {
                  /* MIC start is on an odd boundary */
                  mic_buf[0] = skb->data[skb->len - 1];
                  mic = &mic_buf[1];
                  offset = skb->len - 1;
                  len = MICHAEL_MIC_LEN + 1;
            } else {
                  mic = &mic_buf[0];
                  offset = skb->len;
                  len = MICHAEL_MIC_LEN;
            }

            orinoco_mic(priv->tx_tfm_mic,
                      priv->tkip_key[priv->tx_key].tx_mic,
                      eh->h_dest, eh->h_source, 0 /* priority */,
                      skb->data + ETH_HLEN, skb->len - ETH_HLEN, mic);

            /* Write the MIC */
            err = hermes_bap_pwrite(hw, USER_BAP, &mic_buf[0], len,
                              txfid, HERMES_802_3_OFFSET + offset);
            if (err) {
                  printk(KERN_ERR "%s: Error %d writing MIC to BAP\n",
                         dev->name, err);
                  goto busy;
            }
      }

      /* Finally, we actually initiate the send */
      netif_stop_queue(dev);

      err = hermes_docmd_wait(hw, HERMES_CMD_TX | HERMES_CMD_RECL,
                        txfid, 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 += HERMES_802_3_OFFSET + 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:
      if (err == -EIO)
            schedule_work(&priv->reset_work);
      orinoco_unlock(priv, &flags);
      return NETDEV_TX_BUSY;
}

static void __orinoco_ev_alloc(struct net_device *dev, hermes_t *hw)
{
      struct orinoco_private *priv = netdev_priv(dev);
      u16 fid = hermes_read_regn(hw, ALLOCFID);

      if (fid != priv->txfid) {
            if (fid != DUMMY_FID)
                  printk(KERN_WARNING "%s: Allocate event on unexpected fid (%04X)\n",
                         dev->name, fid);
            return;
      }

      hermes_write_regn(hw, ALLOCFID, DUMMY_FID);
}

static void __orinoco_ev_tx(struct net_device *dev, hermes_t *hw)
{
      struct orinoco_private *priv = netdev_priv(dev);
      struct net_device_stats *stats = &priv->stats;

      stats->tx_packets++;

      netif_wake_queue(dev);

      hermes_write_regn(hw, TXCOMPLFID, DUMMY_FID);
}

static void __orinoco_ev_txexc(struct net_device *dev, hermes_t *hw)
{
      struct orinoco_private *priv = netdev_priv(dev);
      struct net_device_stats *stats = &priv->stats;
      u16 fid = hermes_read_regn(hw, TXCOMPLFID);
      u16 status;
      struct hermes_txexc_data hdr;
      int err = 0;

      if (fid == DUMMY_FID)
            return; /* Nothing's really happened */

      /* Read part of the frame header - we need status and addr1 */
      err = hermes_bap_pread(hw, IRQ_BAP, &hdr,
                         sizeof(struct hermes_txexc_data),
                         fid, 0);

      hermes_write_regn(hw, TXCOMPLFID, DUMMY_FID);
      stats->tx_errors++;

      if (err) {
            printk(KERN_WARNING "%s: Unable to read descriptor on Tx error "
                   "(FID=%04X error %d)\n",
                   dev->name, fid, err);
            return;
      }

      DEBUG(1, "%s: Tx error, err %d (FID=%04X)\n", dev->name,
            err, fid);

      /* We produce a TXDROP event only for retry or lifetime
       * exceeded, because that's the only status that really mean
       * that this particular node went away.
       * Other errors means that *we* screwed up. - Jean II */
      status = le16_to_cpu(hdr.desc.status);
      if (status & (HERMES_TXSTAT_RETRYERR | HERMES_TXSTAT_AGEDERR)) {
            union iwreq_data  wrqu;

            /* Copy 802.11 dest address.
             * We use the 802.11 header because the frame may
             * not be 802.3 or may be mangled...
             * In Ad-Hoc mode, it will be the node address.
             * In managed mode, it will be most likely the AP addr
             * User space will figure out how to convert it to
             * whatever it needs (IP address or else).
             * - Jean II */
            memcpy(wrqu.addr.sa_data, hdr.addr1, ETH_ALEN);
            wrqu.addr.sa_family = ARPHRD_ETHER;

            /* Send event to user space */
            wireless_send_event(dev, IWEVTXDROP, &wrqu, NULL);
      }

      netif_wake_queue(dev);
}

static void orinoco_tx_timeout(struct net_device *dev)
{
      struct orinoco_private *priv = netdev_priv(dev);
      struct net_device_stats *stats = &priv->stats;
      struct hermes *hw = &priv->hw;

      printk(KERN_WARNING "%s: Tx timeout! "
             "ALLOCFID=%04x, TXCOMPLFID=%04x, EVSTAT=%04x\n",
             dev->name, hermes_read_regn(hw, ALLOCFID),
             hermes_read_regn(hw, TXCOMPLFID), hermes_read_regn(hw, EVSTAT));

      stats->tx_errors++;

      schedule_work(&priv->reset_work);
}

/********************************************************************/
/* Rx path (data frames)                                            */
/********************************************************************/

/* Does the frame have a SNAP header indicating it should be
 * de-encapsulated to Ethernet-II? */
static inline int is_ethersnap(void *_hdr)
{
      u8 *hdr = _hdr;

      /* We de-encapsulate all packets which, a) have SNAP headers
       * (i.e. SSAP=DSAP=0xaa and CTRL=0x3 in the 802.2 LLC header
       * and where b) the OUI of the SNAP header is 00:00:00 or
       * 00:00:f8 - we need both because different APs appear to use
       * different OUIs for some reason */
      return (memcmp(hdr, &encaps_hdr, 5) == 0)
            && ((hdr[5] == 0x00) || (hdr[5] == 0xf8));
}

static inline void orinoco_spy_gather(struct net_device *dev, u_char *mac,
                              int level, int noise)
{
      struct iw_quality wstats;
      wstats.level = level - 0x95;
      wstats.noise = noise - 0x95;
      wstats.qual = (level > noise) ? (level - noise) : 0;
      wstats.updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM;
      /* Update spy records */
      wireless_spy_update(dev, mac, &wstats);
}

static void orinoco_stat_gather(struct net_device *dev,
                        struct sk_buff *skb,
                        struct hermes_rx_descriptor *desc)
{
      struct orinoco_private *priv = netdev_priv(dev);

      /* Using spy support with lots of Rx packets, like in an
       * infrastructure (AP), will really slow down everything, because
       * the MAC address must be compared to each entry of the spy list.
       * If the user really asks for it (set some address in the
       * spy list), we do it, but he will pay the price.
       * Note that to get here, you need both WIRELESS_SPY
       * compiled in AND some addresses in the list !!!
       */
      /* Note : gcc will optimise the whole section away if
       * WIRELESS_SPY is not defined... - Jean II */
      if (SPY_NUMBER(priv)) {
            orinoco_spy_gather(dev, skb_mac_header(skb) + ETH_ALEN,
                           desc->signal, desc->silence);
      }
}

/*
 * orinoco_rx_monitor - handle received monitor frames.
 *
 * Arguments:
 *    dev         network device
 *    rxfid       received FID
 *    desc        rx descriptor of the frame
 *
 * Call context: interrupt
 */
static void orinoco_rx_monitor(struct net_device *dev, u16 rxfid,
                         struct hermes_rx_descriptor *desc)
{
      u32 hdrlen = 30;  /* return full header by default */
      u32 datalen = 0;
      u16 fc;
      int err;
      int len;
      struct sk_buff *skb;
      struct orinoco_private *priv = netdev_priv(dev);
      struct net_device_stats *stats = &priv->stats;
      hermes_t *hw = &priv->hw;

      len = le16_to_cpu(desc->data_len);

      /* Determine the size of the header and the data */
      fc = le16_to_cpu(desc->frame_ctl);
      switch (fc & IEEE80211_FCTL_FTYPE) {
      case IEEE80211_FTYPE_DATA:
            if ((fc & IEEE80211_FCTL_TODS)
                && (fc & IEEE80211_FCTL_FROMDS))
                  hdrlen = 30;
            else
                  hdrlen = 24;
            datalen = len;
            break;
      case IEEE80211_FTYPE_MGMT:
            hdrlen = 24;
            datalen = len;
            break;
      case IEEE80211_FTYPE_CTL:
            switch (fc & IEEE80211_FCTL_STYPE) {
            case IEEE80211_STYPE_PSPOLL:
            case IEEE80211_STYPE_RTS:
            case IEEE80211_STYPE_CFEND:
            case IEEE80211_STYPE_CFENDACK:
                  hdrlen = 16;
                  break;
            case IEEE80211_STYPE_CTS:
            case IEEE80211_STYPE_ACK:
                  hdrlen = 10;
                  break;
            }
            break;
      default:
            /* Unknown frame type */
            break;
      }

      /* sanity check the length */
      if (datalen > IEEE80211_MAX_DATA_LEN + 12) {
            printk(KERN_DEBUG "%s: oversized monitor frame, "
                   "data length = %d\n", dev->name, datalen);
            stats->rx_length_errors++;
            goto update_stats;
      }

      skb = dev_alloc_skb(hdrlen + datalen);
      if (!skb) {
            printk(KERN_WARNING "%s: Cannot allocate skb for monitor frame\n",
                   dev->name);
            goto update_stats;
      }

      /* Copy the 802.11 header to the skb */
      memcpy(skb_put(skb, hdrlen), &(desc->frame_ctl), hdrlen);
      skb_reset_mac_header(skb);

      /* If any, copy the data from the card to the skb */
      if (datalen > 0) {
            err = hermes_bap_pread(hw, IRQ_BAP, skb_put(skb, datalen),
                               ALIGN(datalen, 2), rxfid,
                               HERMES_802_2_OFFSET);
            if (err) {
                  printk(KERN_ERR "%s: error %d reading monitor frame\n",
                         dev->name, err);
                  goto drop;
            }
      }

      skb->dev = dev;
      skb->ip_summed = CHECKSUM_NONE;
      skb->pkt_type = PACKET_OTHERHOST;
      skb->protocol = cpu_to_be16(ETH_P_802_2);

      stats->rx_packets++;
      stats->rx_bytes += skb->len;

      netif_rx(skb);
      return;

 drop:
      dev_kfree_skb_irq(skb);
 update_stats:
      stats->rx_errors++;
      stats->rx_dropped++;
}

static void __orinoco_ev_rx(struct net_device *dev, hermes_t *hw)
{
      struct orinoco_private *priv = netdev_priv(dev);
      struct net_device_stats *stats = &priv->stats;
      struct iw_statistics *wstats = &priv->wstats;
      struct sk_buff *skb = NULL;
      u16 rxfid, status;
      int length;
      struct hermes_rx_descriptor *desc;
      struct orinoco_rx_data *rx_data;
      int err;

      desc = kmalloc(sizeof(*desc), GFP_ATOMIC);
      if (!desc) {
            printk(KERN_WARNING
                   "%s: Can't allocate space for RX descriptor\n",
                   dev->name);
            goto update_stats;
      }

      rxfid = hermes_read_regn(hw, RXFID);

      err = hermes_bap_pread(hw, IRQ_BAP, desc, sizeof(*desc),
                         rxfid, 0);
      if (err) {
            printk(KERN_ERR "%s: error %d reading Rx descriptor. "
                   "Frame dropped.\n", dev->name, err);
            goto update_stats;
      }

      status = le16_to_cpu(desc->status);

      if (status & HERMES_RXSTAT_BADCRC) {
            DEBUG(1, "%s: Bad CRC on Rx. Frame dropped.\n",
                  dev->name);
            stats->rx_crc_errors++;
            goto update_stats;
      }

      /* Handle frames in monitor mode */
      if (priv->iw_mode == IW_MODE_MONITOR) {
            orinoco_rx_monitor(dev, rxfid, desc);
            goto out;
      }

      if (status & HERMES_RXSTAT_UNDECRYPTABLE) {
            DEBUG(1, "%s: Undecryptable frame on Rx. Frame dropped.\n",
                  dev->name);
            wstats->discard.code++;
            goto update_stats;
      }

      length = le16_to_cpu(desc->data_len);

      /* Sanity checks */
      if (length < 3) { /* No for even an 802.2 LLC header */
            /* At least on Symbol firmware with PCF we get quite a
               lot of these legitimately - Poll frames with no
               data. */
            goto out;
      }
      if (length > IEEE80211_MAX_DATA_LEN) {
            printk(KERN_WARNING "%s: Oversized frame received (%d bytes)\n",
                   dev->name, length);
            stats->rx_length_errors++;
            goto update_stats;
      }

      /* Payload size does not include Michael MIC. Increase payload
       * size to read it together with the data. */
      if (status & HERMES_RXSTAT_MIC)
            length += MICHAEL_MIC_LEN;

      /* We need space for the packet data itself, plus an ethernet
         header, plus 2 bytes so we can align the IP header on a
         32bit boundary, plus 1 byte so we can read in odd length
         packets from the card, which has an IO granularity of 16
         bits */
      skb = dev_alloc_skb(length+ETH_HLEN+2+1);
      if (!skb) {
            printk(KERN_WARNING "%s: Can't allocate skb for Rx\n",
                   dev->name);
            goto update_stats;
      }

      /* We'll prepend the header, so reserve space for it.  The worst
         case is no decapsulation, when 802.3 header is prepended and
         nothing is removed.  2 is for aligning the IP header.  */
      skb_reserve(skb, ETH_HLEN + 2);

      err = hermes_bap_pread(hw, IRQ_BAP, skb_put(skb, length),
                         ALIGN(length, 2), rxfid,
                         HERMES_802_2_OFFSET);
      if (err) {
            printk(KERN_ERR "%s: error %d reading frame. "
                   "Frame dropped.\n", dev->name, err);
            goto drop;
      }

      /* Add desc and skb to rx queue */
      rx_data = kzalloc(sizeof(*rx_data), GFP_ATOMIC);
      if (!rx_data) {
            printk(KERN_WARNING "%s: Can't allocate RX packet\n",
                  dev->name);
            goto drop;
      }
      rx_data->desc = desc;
      rx_data->skb = skb;
      list_add_tail(&rx_data->list, &priv->rx_list);
      tasklet_schedule(&priv->rx_tasklet);

      return;

drop:
      dev_kfree_skb_irq(skb);
update_stats:
      stats->rx_errors++;
      stats->rx_dropped++;
out:
      kfree(desc);
}

static void orinoco_rx(struct net_device *dev,
                   struct hermes_rx_descriptor *desc,
                   struct sk_buff *skb)
{
      struct orinoco_private *priv = netdev_priv(dev);
      struct net_device_stats *stats = &priv->stats;
      u16 status, fc;
      int length;
      struct ethhdr *hdr;

      status = le16_to_cpu(desc->status);
      length = le16_to_cpu(desc->data_len);
      fc = le16_to_cpu(desc->frame_ctl);

      /* Calculate and check MIC */
      if (status & HERMES_RXSTAT_MIC) {
            int key_id = ((status & HERMES_RXSTAT_MIC_KEY_ID) >>
                        HERMES_MIC_KEY_ID_SHIFT);
            u8 mic[MICHAEL_MIC_LEN];
            u8 *rxmic;
            u8 *src = (fc & IEEE80211_FCTL_FROMDS) ?
                  desc->addr3 : desc->addr2;

            /* Extract Michael MIC from payload */
            rxmic = skb->data + skb->len - MICHAEL_MIC_LEN;

            skb_trim(skb, skb->len - MICHAEL_MIC_LEN);
            length -= MICHAEL_MIC_LEN;

            orinoco_mic(priv->rx_tfm_mic,
                      priv->tkip_key[key_id].rx_mic,
                      desc->addr1,
                      src,
                      0, /* priority or QoS? */
                      skb->data,
                      skb->len,
                      &mic[0]);

            if (memcmp(mic, rxmic,
                     MICHAEL_MIC_LEN)) {
                  union iwreq_data wrqu;
                  struct iw_michaelmicfailure wxmic;

                  printk(KERN_WARNING "%s: "
                         "Invalid Michael MIC in data frame from %pM, "
                         "using key %i\n",
                         dev->name, src, key_id);

                  /* TODO: update stats */

                  /* Notify userspace */
                  memset(&wxmic, 0, sizeof(wxmic));
                  wxmic.flags = key_id & IW_MICFAILURE_KEY_ID;
                  wxmic.flags |= (desc->addr1[0] & 1) ?
                        IW_MICFAILURE_GROUP : IW_MICFAILURE_PAIRWISE;
                  wxmic.src_addr.sa_family = ARPHRD_ETHER;
                  memcpy(wxmic.src_addr.sa_data, src, ETH_ALEN);

                  (void) orinoco_hw_get_tkip_iv(priv, key_id,
                                          &wxmic.tsc[0]);

                  memset(&wrqu, 0, sizeof(wrqu));
                  wrqu.data.length = sizeof(wxmic);
                  wireless_send_event(dev, IWEVMICHAELMICFAILURE, &wrqu,
                                  (char *) &wxmic);

                  goto drop;
            }
      }

      /* Handle decapsulation
       * In most cases, the firmware tell us about SNAP frames.
       * For some reason, the SNAP frames sent by LinkSys APs
       * are not properly recognised by most firmwares.
       * So, check ourselves */
      if (length >= ENCAPS_OVERHEAD &&
          (((status & HERMES_RXSTAT_MSGTYPE) == HERMES_RXSTAT_1042) ||
           ((status & HERMES_RXSTAT_MSGTYPE) == HERMES_RXSTAT_TUNNEL) ||
           is_ethersnap(skb->data))) {
            /* These indicate a SNAP within 802.2 LLC within
               802.11 frame which we'll need to de-encapsulate to
               the original EthernetII frame. */
            hdr = (struct ethhdr *)skb_push(skb,
                                    ETH_HLEN - ENCAPS_OVERHEAD);
      } else {
            /* 802.3 frame - prepend 802.3 header as is */
            hdr = (struct ethhdr *)skb_push(skb, ETH_HLEN);
            hdr->h_proto = htons(length);
      }
      memcpy(hdr->h_dest, desc->addr1, ETH_ALEN);
      if (fc & IEEE80211_FCTL_FROMDS)
            memcpy(hdr->h_source, desc->addr3, ETH_ALEN);
      else
            memcpy(hdr->h_source, desc->addr2, ETH_ALEN);

      skb->protocol = eth_type_trans(skb, dev);
      skb->ip_summed = CHECKSUM_NONE;
      if (fc & IEEE80211_FCTL_TODS)
            skb->pkt_type = PACKET_OTHERHOST;

      /* Process the wireless stats if needed */
      orinoco_stat_gather(dev, skb, desc);

      /* Pass the packet to the networking stack */
      netif_rx(skb);
      stats->rx_packets++;
      stats->rx_bytes += length;

      return;

 drop:
      dev_kfree_skb(skb);
      stats->rx_errors++;
      stats->rx_dropped++;
}

static void orinoco_rx_isr_tasklet(unsigned long data)
{
      struct net_device *dev = (struct net_device *) data;
      struct orinoco_private *priv = netdev_priv(dev);
      struct orinoco_rx_data *rx_data, *temp;
      struct hermes_rx_descriptor *desc;
      struct sk_buff *skb;
      unsigned long flags;

      /* orinoco_rx requires the driver lock, and we also need to
       * protect priv->rx_list, so just hold the lock over the
       * lot.
       *
       * If orinoco_lock fails, we've unplugged the card. In this
       * case just abort. */
      if (orinoco_lock(priv, &flags) != 0)
            return;

      /* extract desc and skb from queue */
      list_for_each_entry_safe(rx_data, temp, &priv->rx_list, list) {
            desc = rx_data->desc;
            skb = rx_data->skb;
            list_del(&rx_data->list);
            kfree(rx_data);

            orinoco_rx(dev, desc, skb);

            kfree(desc);
      }

      orinoco_unlock(priv, &flags);
}

/********************************************************************/
/* Rx path (info frames)                                            */
/********************************************************************/

static void print_linkstatus(struct net_device *dev, u16 status)
{
      char *s;

      if (suppress_linkstatus)
            return;

      switch (status) {
      case HERMES_LINKSTATUS_NOT_CONNECTED:
            s = "Not Connected";
            break;
      case HERMES_LINKSTATUS_CONNECTED:
            s = "Connected";
            break;
      case HERMES_LINKSTATUS_DISCONNECTED:
            s = "Disconnected";
            break;
      case HERMES_LINKSTATUS_AP_CHANGE:
            s = "AP Changed";
            break;
      case HERMES_LINKSTATUS_AP_OUT_OF_RANGE:
            s = "AP Out of Range";
            break;
      case HERMES_LINKSTATUS_AP_IN_RANGE:
            s = "AP In Range";
            break;
      case HERMES_LINKSTATUS_ASSOC_FAILED:
            s = "Association Failed";
            break;
      default:
            s = "UNKNOWN";
      }

      printk(KERN_DEBUG "%s: New link status: %s (%04x)\n",
             dev->name, s, status);
}

/* Search scan results for requested BSSID, join it if found */
static void orinoco_join_ap(struct work_struct *work)
{
      struct orinoco_private *priv =
            container_of(work, struct orinoco_private, join_work);
      struct net_device *dev = priv->ndev;
      struct hermes *hw = &priv->hw;
      int err;
      unsigned long flags;
      struct join_req {
            u8 bssid[ETH_ALEN];
            __le16 channel;
      } __attribute__ ((packed)) req;
      const int atom_len = offsetof(struct prism2_scan_apinfo, atim);
      struct prism2_scan_apinfo *atom = NULL;
      int offset = 4;
      int found = 0;
      u8 *buf;
      u16 len;

      /* Allocate buffer for scan results */
      buf = kmalloc(MAX_SCAN_LEN, GFP_KERNEL);
      if (!buf)
            return;

      if (orinoco_lock(priv, &flags) != 0)
            goto fail_lock;

      /* Sanity checks in case user changed something in the meantime */
      if (!priv->bssid_fixed)
            goto out;

      if (strlen(priv->desired_essid) == 0)
            goto out;

      /* Read scan results from the firmware */
      err = hermes_read_ltv(hw, USER_BAP,
                        HERMES_RID_SCANRESULTSTABLE,
                        MAX_SCAN_LEN, &len, buf);
      if (err) {
            printk(KERN_ERR "%s: Cannot read scan results\n",
                   dev->name);
            goto out;
      }

      len = HERMES_RECLEN_TO_BYTES(len);

      /* Go through the scan results looking for the channel of the AP
       * we were requested to join */
      for (; offset + atom_len <= len; offset += atom_len) {
            atom = (struct prism2_scan_apinfo *) (buf + offset);
            if (memcmp(&atom->bssid, priv->desired_bssid, ETH_ALEN) == 0) {
                  found = 1;
                  break;
            }
      }

      if (!found) {
            DEBUG(1, "%s: Requested AP not found in scan results\n",
                  dev->name);
            goto out;
      }

      memcpy(req.bssid, priv->desired_bssid, ETH_ALEN);
      req.channel = atom->channel;  /* both are little-endian */
      err = HERMES_WRITE_RECORD(hw, USER_BAP, HERMES_RID_CNFJOINREQUEST,
                          &req);
      if (err)
            printk(KERN_ERR "%s: Error issuing join request\n", dev->name);

 out:
      orinoco_unlock(priv, &flags);

 fail_lock:
      kfree(buf);
}

/* Send new BSSID to userspace */
static void orinoco_send_bssid_wevent(struct orinoco_private *priv)
{
      struct net_device *dev = priv->ndev;
      struct hermes *hw = &priv->hw;
      union iwreq_data wrqu;
      int err;

      err = hermes_read_ltv(hw, USER_BAP, HERMES_RID_CURRENTBSSID,
                        ETH_ALEN, NULL, wrqu.ap_addr.sa_data);
      if (err != 0)
            return;

      wrqu.ap_addr.sa_family = ARPHRD_ETHER;

      /* Send event to user space */
      wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
}

static void orinoco_send_assocreqie_wevent(struct orinoco_private *priv)
{
      struct net_device *dev = priv->ndev;
      struct hermes *hw = &priv->hw;
      union iwreq_data wrqu;
      int err;
      u8 buf[88];
      u8 *ie;

      if (!priv->has_wpa)
            return;

      err = hermes_read_ltv(hw, USER_BAP, HERMES_RID_CURRENT_ASSOC_REQ_INFO,
                        sizeof(buf), NULL, &buf);
      if (err != 0)
            return;

      ie = orinoco_get_wpa_ie(buf, sizeof(buf));
      if (ie) {
            int rem = sizeof(buf) - (ie - &buf[0]);
            wrqu.data.length = ie[1] + 2;
            if (wrqu.data.length > rem)
                  wrqu.data.length = rem;

            if (wrqu.data.length)
                  /* Send event to user space */
                  wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, ie);
      }
}

static void orinoco_send_assocrespie_wevent(struct orinoco_private *priv)
{
      struct net_device *dev = priv->ndev;
      struct hermes *hw = &priv->hw;
      union iwreq_data wrqu;
      int err;
      u8 buf[88]; /* TODO: verify max size or IW_GENERIC_IE_MAX */
      u8 *ie;

      if (!priv->has_wpa)
            return;

      err = hermes_read_ltv(hw, USER_BAP, HERMES_RID_CURRENT_ASSOC_RESP_INFO,
                        sizeof(buf), NULL, &buf);
      if (err != 0)
            return;

      ie = orinoco_get_wpa_ie(buf, sizeof(buf));
      if (ie) {
            int rem = sizeof(buf) - (ie - &buf[0]);
            wrqu.data.length = ie[1] + 2;
            if (wrqu.data.length > rem)
                  wrqu.data.length = rem;

            if (wrqu.data.length)
                  /* Send event to user space */
                  wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, ie);
      }
}

static void orinoco_send_wevents(struct work_struct *work)
{
      struct orinoco_private *priv =
            container_of(work, struct orinoco_private, wevent_work);
      unsigned long flags;

      if (orinoco_lock(priv, &flags) != 0)
            return;

      orinoco_send_assocreqie_wevent(priv);
      orinoco_send_assocrespie_wevent(priv);
      orinoco_send_bssid_wevent(priv);

      orinoco_unlock(priv, &flags);
}

static void __orinoco_ev_info(struct net_device *dev, hermes_t *hw)
{
      struct orinoco_private *priv = netdev_priv(dev);
      u16 infofid;
      struct {
            __le16 len;
            __le16 type;
      } __attribute__ ((packed)) info;
      int len, type;
      int err;

      /* This is an answer to an INQUIRE command that we did earlier,
       * or an information "event" generated by the card
       * The controller return to us a pseudo frame containing
       * the information in question - Jean II */
      infofid = hermes_read_regn(hw, INFOFID);

      /* Read the info frame header - don't try too hard */
      err = hermes_bap_pread(hw, IRQ_BAP, &info, sizeof(info),
                         infofid, 0);
      if (err) {
            printk(KERN_ERR "%s: error %d reading info frame. "
                   "Frame dropped.\n", dev->name, err);
            return;
      }

      len = HERMES_RECLEN_TO_BYTES(le16_to_cpu(info.len));
      type = le16_to_cpu(info.type);

      switch (type) {
      case HERMES_INQ_TALLIES: {
            struct hermes_tallies_frame tallies;
            struct iw_statistics *wstats = &priv->wstats;

            if (len > sizeof(tallies)) {
                  printk(KERN_WARNING "%s: Tallies frame too long (%d bytes)\n",
                         dev->name, len);
                  len = sizeof(tallies);
            }

            err = hermes_bap_pread(hw, IRQ_BAP, &tallies, len,
                               infofid, sizeof(info));
            if (err)
                  break;

            /* Increment our various counters */
            /* wstats->discard.nwid - no wrong BSSID stuff */
            wstats->discard.code +=
                  le16_to_cpu(tallies.RxWEPUndecryptable);
            if (len == sizeof(tallies))
                  wstats->discard.code +=
                        le16_to_cpu(tallies.RxDiscards_WEPICVError) +
                        le16_to_cpu(tallies.RxDiscards_WEPExcluded);
            wstats->discard.misc +=
                  le16_to_cpu(tallies.TxDiscardsWrongSA);
            wstats->discard.fragment +=
                  le16_to_cpu(tallies.RxMsgInBadMsgFragments);
            wstats->discard.retries +=
                  le16_to_cpu(tallies.TxRetryLimitExceeded);
            /* wstats->miss.beacon - no match */
      }
      break;
      case HERMES_INQ_LINKSTATUS: {
            struct hermes_linkstatus linkstatus;
            u16 newstatus;
            int connected;

            if (priv->iw_mode == IW_MODE_MONITOR)
                  break;

            if (len != sizeof(linkstatus)) {
                  printk(KERN_WARNING "%s: Unexpected size for linkstatus frame (%d bytes)\n",
                         dev->name, len);
                  break;
            }

            err = hermes_bap_pread(hw, IRQ_BAP, &linkstatus, len,
                               infofid, sizeof(info));
            if (err)
                  break;
            newstatus = le16_to_cpu(linkstatus.linkstatus);

            /* Symbol firmware uses "out of range" to signal that
             * the hostscan frame can be requested.  */
            if (newstatus == HERMES_LINKSTATUS_AP_OUT_OF_RANGE &&
                priv->firmware_type == FIRMWARE_TYPE_SYMBOL &&
                priv->has_hostscan && priv->scan_inprogress) {
                  hermes_inquire(hw, HERMES_INQ_HOSTSCAN_SYMBOL);
                  break;
            }

            connected = (newstatus == HERMES_LINKSTATUS_CONNECTED)
                  || (newstatus == HERMES_LINKSTATUS_AP_CHANGE)
                  || (newstatus == HERMES_LINKSTATUS_AP_IN_RANGE);

            if (connected)
                  netif_carrier_on(dev);
            else if (!ignore_disconnect)
                  netif_carrier_off(dev);

            if (newstatus != priv->last_linkstatus) {
                  priv->last_linkstatus = newstatus;
                  print_linkstatus(dev, newstatus);
                  /* The info frame contains only one word which is the
                   * status (see hermes.h). The status is pretty boring
                   * in itself, that's why we export the new BSSID...
                   * Jean II */
                  schedule_work(&priv->wevent_work);
            }
      }
      break;
      case HERMES_INQ_SCAN:
            if (!priv->scan_inprogress && priv->bssid_fixed &&
                priv->firmware_type == FIRMWARE_TYPE_INTERSIL) {
                  schedule_work(&priv->join_work);
                  break;
            }
            /* fall through */
      case HERMES_INQ_HOSTSCAN:
      case HERMES_INQ_HOSTSCAN_SYMBOL: {
            /* Result of a scanning. Contains information about
             * cells in the vicinity - Jean II */
            union iwreq_data  wrqu;
            unsigned char *buf;

            /* Scan is no longer in progress */
            priv->scan_inprogress = 0;

            /* Sanity check */
            if (len > 4096) {
                  printk(KERN_WARNING "%s: Scan results too large (%d bytes)\n",
                         dev->name, len);
                  break;
            }

            /* Allocate buffer for results */
            buf = kmalloc(len, GFP_ATOMIC);
            if (buf == NULL)
                  /* No memory, so can't printk()... */
                  break;

            /* Read scan data */
            err = hermes_bap_pread(hw, IRQ_BAP, (void *) buf, len,
                               infofid, sizeof(info));
            if (err) {
                  kfree(buf);
                  break;
            }

#ifdef ORINOCO_DEBUG
            {
                  int   i;
                  printk(KERN_DEBUG "Scan result [%02X", buf[0]);
                  for (i = 1; i < (len * 2); i++)
                        printk(":%02X", buf[i]);
                  printk("]\n");
            }
#endif      /* ORINOCO_DEBUG */

            if (orinoco_process_scan_results(priv, buf, len) == 0) {
                  /* Send an empty event to user space.
                   * We don't send the received data on the event because
                   * it would require us to do complex transcoding, and
                   * we want to minimise the work done in the irq handler
                   * Use a request to extract the data - Jean II */
                  wrqu.data.length = 0;
                  wrqu.data.flags = 0;
                  wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
            }
            kfree(buf);
      }
      break;
      case HERMES_INQ_CHANNELINFO:
      {
            struct agere_ext_scan_info *bss;

            if (!priv->scan_inprogress) {
                  printk(KERN_DEBUG "%s: Got chaninfo without scan, "
                         "len=%d\n", dev->name, len);
                  break;
            }

            /* An empty result indicates that the scan is complete */
            if (len == 0) {
                  union iwreq_data  wrqu;

                  /* Scan is no longer in progress */
                  priv->scan_inprogress = 0;

                  wrqu.data.length = 0;
                  wrqu.data.flags = 0;
                  wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
                  break;
            }

            /* Sanity check */
            else if (len > sizeof(*bss)) {
                  printk(KERN_WARNING
                         "%s: Ext scan results too large (%d bytes). "
                         "Truncating results to %zd bytes.\n",
                         dev->name, len, sizeof(*bss));
                  len = sizeof(*bss);
            } else if (len < (offsetof(struct agere_ext_scan_info,
                                 data) + 2)) {
                  /* Drop this result now so we don't have to
                   * keep checking later */
                  printk(KERN_WARNING
                         "%s: Ext scan results too short (%d bytes)\n",
                         dev->name, len);
                  break;
            }

            bss = kmalloc(sizeof(*bss), GFP_ATOMIC);
            if (bss == NULL)
                  break;

            /* Read scan data */
            err = hermes_bap_pread(hw, IRQ_BAP, (void *) bss, len,
                               infofid, sizeof(info));
            if (err) {
                  kfree(bss);
                  break;
            }

            orinoco_add_ext_scan_result(priv, bss);

            kfree(bss);
            break;
      }
      case HERMES_INQ_SEC_STAT_AGERE:
            /* Security status (Agere specific) */
            /* Ignore this frame for now */
            if (priv->firmware_type == FIRMWARE_TYPE_AGERE)
                  break;
            /* fall through */
      default:
            printk(KERN_DEBUG "%s: Unknown information frame received: "
                   "type 0x%04x, length %d\n", dev->name, type, len);
            /* We don't actually do anything about it */
            break;
      }
}

static void __orinoco_ev_infdrop(struct net_device *dev, hermes_t *hw)
{
      if (net_ratelimit())
            printk(KERN_DEBUG "%s: Information frame lost.\n", dev->name);
}

/********************************************************************/
/* Internal hardware control routines                               */
/********************************************************************/

int __orinoco_up(struct net_device *dev)
{
      struct orinoco_private *priv = netdev_priv(dev);
      struct hermes *hw = &priv->hw;
      int err;

      netif_carrier_off(dev); /* just to make sure */

      err = __orinoco_program_rids(dev);
      if (err) {
            printk(KERN_ERR "%s: Error %d configuring card\n",
                   dev->name, err);
            return err;
      }

      /* Fire things up again */
      hermes_set_irqmask(hw, ORINOCO_INTEN);
      err = hermes_enable_port(hw, 0);
      if (err) {
            printk(KERN_ERR "%s: Error %d enabling MAC port\n",
                   dev->name, err);
            return err;
      }

      netif_start_queue(dev);

      return 0;
}
EXPORT_SYMBOL(__orinoco_up);

int __orinoco_down(struct net_device *dev)
{
      struct orinoco_private *priv = netdev_priv(dev);
      struct hermes *hw = &priv->hw;
      int err;

      netif_stop_queue(dev);

      if (!priv->hw_unavailable) {
            if (!priv->broken_disableport) {
                  err = hermes_disable_port(hw, 0);
                  if (err) {
                        /* Some firmwares (e.g. Intersil 1.3.x) seem
                         * to have problems disabling the port, oh
                         * well, too bad. */
                        printk(KERN_WARNING "%s: Error %d disabling MAC port\n",
                               dev->name, err);
                        priv->broken_disableport = 1;
                  }
            }
            hermes_set_irqmask(hw, 0);
            hermes_write_regn(hw, EVACK, 0xffff);
      }

      /* firmware will have to reassociate */
      netif_carrier_off(dev);
      priv->last_linkstatus = 0xffff;

      return 0;
}
EXPORT_SYMBOL(__orinoco_down);

static int orinoco_allocate_fid(struct net_device *dev)
{
      struct orinoco_private *priv = netdev_priv(dev);
      struct hermes *hw = &priv->hw;
      int err;

      err = hermes_allocate(hw, priv->nicbuf_size, &priv->txfid);
      if (err == -EIO && priv->nicbuf_size > TX_NICBUF_SIZE_BUG) {
            /* Try workaround for old Symbol firmware bug */
            priv->nicbuf_size = TX_NICBUF_SIZE_BUG;
            err = hermes_allocate(hw, priv->nicbuf_size, &priv->txfid);

            printk(KERN_WARNING "%s: firmware ALLOC bug detected "
                   "(old Symbol firmware?). Work around %s\n",
                   dev->name, err ? "failed!" : "ok.");
      }

      return err;
}

int orinoco_reinit_firmware(struct net_device *dev)
{
      struct orinoco_private *priv = netdev_priv(dev);
      struct hermes *hw = &priv->hw;
      int err;

      err = hermes_init(hw);
      if (priv->do_fw_download && !err) {
            err = orinoco_download(priv);
            if (err)
                  priv->do_fw_download = 0;
      }
      if (!err)
            err = orinoco_allocate_fid(dev);

      return err;
}
EXPORT_SYMBOL(orinoco_reinit_firmware);

int __orinoco_program_rids(struct net_device *dev)
{
      struct orinoco_private *priv = netdev_priv(dev);
      hermes_t *hw = &priv->hw;
      int err;
      struct hermes_idstring idbuf;

      /* Set the MAC address */
      err = hermes_write_ltv(hw, USER_BAP, HERMES_RID_CNFOWNMACADDR,
                         HERMES_BYTES_TO_RECLEN(ETH_ALEN), dev->dev_addr);
      if (err) {
            printk(KERN_ERR "%s: Error %d setting MAC address\n",
                   dev->name, err);
            return err;
      }

      /* Set up the link mode */
      err = hermes_write_wordrec(hw, USER_BAP, HERMES_RID_CNFPORTTYPE,
                           priv->port_type);
      if (err) {
            printk(KERN_ERR "%s: Error %d setting port type\n",
                   dev->name, err);
            return err;
      }
      /* Set the channel/frequency */
      if (priv->channel != 0 && priv->iw_mode != IW_MODE_INFRA) {
            err = hermes_write_wordrec(hw, USER_BAP,
                                 HERMES_RID_CNFOWNCHANNEL,
                                 priv->channel);
            if (err) {
                  printk(KERN_ERR "%s: Error %d setting channel %d\n",
                         dev->name, err, priv->channel);
                  return err;
            }
      }

      if (priv->has_ibss) {
            u16 createibss;

            if ((strlen(priv->desired_essid) == 0) && (priv->createibss)) {
                  printk(KERN_WARNING "%s: This firmware requires an "
                         "ESSID in IBSS-Ad-Hoc mode.\n", dev->name);
                  /* With wvlan_cs, in this case, we would crash.
                   * hopefully, this driver will behave better...
                   * Jean II */
                  createibss = 0;
            } else {
                  createibss = priv->createibss;
            }

            err = hermes_write_wordrec(hw, USER_BAP,
                                 HERMES_RID_CNFCREATEIBSS,
                                 createibss);
            if (err) {
                  printk(KERN_ERR "%s: Error %d setting CREATEIBSS\n",
                         dev->name, err);
                  return err;
            }
      }

      /* Set the desired BSSID */
      err = __orinoco_hw_set_wap(priv);
      if (err) {
            printk(KERN_ERR "%s: Error %d setting AP address\n",
                   dev->name, err);
            return err;
      }
      /* Set the desired ESSID */
      idbuf.len = cpu_to_le16(strlen(priv->desired_essid));
      memcpy(&idbuf.val, priv->desired_essid, sizeof(idbuf.val));
      /* WinXP wants partner to configure OWNSSID even in IBSS mode. (jimc) */
      err = hermes_write_ltv(hw, USER_BAP, HERMES_RID_CNFOWNSSID,
                  HERMES_BYTES_TO_RECLEN(strlen(priv->desired_essid)+2),
                  &idbuf);
      if (err) {
            printk(KERN_ERR "%s: Error %d setting OWNSSID\n",
                   dev->name, err);
            return err;
      }
      err = hermes_write_ltv(hw, USER_BAP, HERMES_RID_CNFDESIREDSSID,
                  HERMES_BYTES_TO_RECLEN(strlen(priv->desired_essid)+2),
                  &idbuf);
      if (err) {
            printk(KERN_ERR "%s: Error %d setting DESIREDSSID\n",
                   dev->name, err);
            return err;
      }

      /* Set the station name */
      idbuf.len = cpu_to_le16(strlen(priv->nick));
      memcpy(&idbuf.val, priv->nick, sizeof(idbuf.val));
      err = hermes_write_ltv(hw, USER_BAP, HERMES_RID_CNFOWNNAME,
                         HERMES_BYTES_TO_RECLEN(strlen(priv->nick)+2),
                         &idbuf);
      if (err) {
            printk(KERN_ERR "%s: Error %d setting nickname\n",
                   dev->name, err);
            return err;
      }

      /* Set AP density */
      if (priv->has_sensitivity) {
            err = hermes_write_wordrec(hw, USER_BAP,
                                 HERMES_RID_CNFSYSTEMSCALE,
                                 priv->ap_density);
            if (err) {
                  printk(KERN_WARNING "%s: Error %d setting SYSTEMSCALE. "
                         "Disabling sensitivity control\n",
                         dev->name, err);

                  priv->has_sensitivity = 0;
            }
      }

      /* Set RTS threshold */
      err = hermes_write_wordrec(hw, USER_BAP, HERMES_RID_CNFRTSTHRESHOLD,
                           priv->rts_thresh);
      if (err) {
            printk(KERN_ERR "%s: Error %d setting RTS threshold\n",
                   dev->name, err);
            return err;
      }

      /* Set fragmentation threshold or MWO robustness */
      if (priv->has_mwo)
            err = hermes_write_wordrec(hw, USER_BAP,
                                 HERMES_RID_CNFMWOROBUST_AGERE,
                                 priv->mwo_robust);
      else
            err = hermes_write_wordrec(hw, USER_BAP,
                                 HERMES_RID_CNFFRAGMENTATIONTHRESHOLD,
                                 priv->frag_thresh);
      if (err) {
            printk(KERN_ERR "%s: Error %d setting fragmentation\n",
                   dev->name, err);
            return err;
      }

      /* Set bitrate */
      err = __orinoco_hw_set_bitrate(priv);
      if (err) {
            printk(KERN_ERR "%s: Error %d setting bitrate\n",
                   dev->name, err);
            return err;
      }

      /* Set power management */
      if (priv->has_pm) {
            err = hermes_write_wordrec(hw, USER_BAP,
                                 HERMES_RID_CNFPMENABLED,
                                 priv->pm_on);
            if (err) {
                  printk(KERN_ERR "%s: Error %d setting up PM\n",
                         dev->name, err);
                  return err;
            }

            err = hermes_write_wordrec(hw, USER_BAP,
                                 HERMES_RID_CNFMULTICASTRECEIVE,
                                 priv->pm_mcast);
            if (err) {
                  printk(KERN_ERR "%s: Error %d setting up PM\n",
                         dev->name, err);
                  return err;
            }
            err = hermes_write_wordrec(hw, USER_BAP,
                                 HERMES_RID_CNFMAXSLEEPDURATION,
                                 priv->pm_period);
            if (err) {
                  printk(KERN_ERR "%s: Error %d setting up PM\n",
                         dev->name, err);
                  return err;
            }
            err = hermes_write_wordrec(hw, USER_BAP,
                                 HERMES_RID_CNFPMHOLDOVERDURATION,
                                 priv->pm_timeout);
            if (err) {
                  printk(KERN_ERR "%s: Error %d setting up PM\n",
                         dev->name, err);
                  return err;
            }
      }

      /* Set preamble - only for Symbol so far... */
      if (priv->has_preamble) {
            err = hermes_write_wordrec(hw, USER_BAP,
                                 HERMES_RID_CNFPREAMBLE_SYMBOL,
                                 priv->preamble);
            if (err) {
                  printk(KERN_ERR "%s: Error %d setting preamble\n",
                         dev->name, err);
                  return err;
            }
      }

      /* Set up encryption */
      if (priv->has_wep || priv->has_wpa) {
            err = __orinoco_hw_setup_enc(priv);
            if (err) {
                  printk(KERN_ERR "%s: Error %d activating encryption\n",
                         dev->name, err);
                  return err;
            }
      }

      if (priv->iw_mode == IW_MODE_MONITOR) {
            /* Enable monitor mode */
            dev->type = ARPHRD_IEEE80211;
            err = hermes_docmd_wait(hw, HERMES_CMD_TEST |
                                  HERMES_TEST_MONITOR, 0, NULL);
      } else {
            /* Disable monitor mode */
            dev->type = ARPHRD_ETHER;
            err = hermes_docmd_wait(hw, HERMES_CMD_TEST |
                                  HERMES_TEST_STOP, 0, NULL);
      }
      if (err)
            return err;

      /* Set promiscuity / multicast*/
      priv->promiscuous = 0;
      priv->mc_count = 0;

      /* FIXME: what about netif_tx_lock */
      __orinoco_set_multicast_list(dev);

      return 0;
}

/* FIXME: return int? */
static void
__orinoco_set_multicast_list(struct net_device *dev)
{
      struct orinoco_private *priv = netdev_priv(dev);
      int err = 0;
      int promisc, mc_count;

      /* The Hermes doesn't seem to have an allmulti mode, so we go
       * into promiscuous mode and let the upper levels deal. */
      if ((dev->flags & IFF_PROMISC) || (dev->flags & IFF_ALLMULTI) ||
          (dev->mc_count > MAX_MULTICAST(priv))) {
            promisc = 1;
            mc_count = 0;
      } else {
            promisc = 0;
            mc_count = dev->mc_count;
      }

      err = __orinoco_hw_set_multicast_list(priv, dev->mc_list, mc_count,
                                    promisc);
}

/* This must be called from user context, without locks held - use
 * schedule_work() */
void orinoco_reset(struct work_struct *work)
{
      struct orinoco_private *priv =
            container_of(work, struct orinoco_private, reset_work);
      struct net_device *dev = priv->ndev;
      struct hermes *hw = &priv->hw;
      int err;
      unsigned long flags;

      if (orinoco_lock(priv, &flags) != 0)
            /* When the hardware becomes available again, whatever
             * detects that is responsible for re-initializing
             * it. So no need for anything further */
            return;

      netif_stop_queue(dev);

      /* Shut off interrupts.  Depending on what state the hardware
       * is in, this might not work, but we'll try anyway */
      hermes_set_irqmask(hw, 0);
      hermes_write_regn(hw, EVACK, 0xffff);

      priv->hw_unavailable++;
      priv->last_linkstatus = 0xffff; /* firmware will have to reassociate */
      netif_carrier_off(dev);

      orinoco_unlock(priv, &flags);

      /* Scanning support: Cleanup of driver struct */
      orinoco_clear_scan_results(priv, 0);
      priv->scan_inprogress = 0;

      if (priv->hard_reset) {
            err = (*priv->hard_reset)(priv);
            if (err) {
                  printk(KERN_ERR "%s: orinoco_reset: Error %d "
                         "performing hard reset\n", dev->name, err);
                  goto disable;
            }
      }

      err = orinoco_reinit_firmware(dev);
      if (err) {
            printk(KERN_ERR "%s: orinoco_reset: Error %d re-initializing firmware\n",
                   dev->name, err);
            goto disable;
      }

      /* This has to be called from user context */
      spin_lock_irq(&priv->lock);

      priv->hw_unavailable--;

      /* priv->open or priv->hw_unavailable might have changed while
       * we dropped the lock */
      if (priv->open && (!priv->hw_unavailable)) {
            err = __orinoco_up(dev);
            if (err) {
                  printk(KERN_ERR "%s: orinoco_reset: Error %d reenabling card\n",
                         dev->name, err);
            } else
                  dev->trans_start = jiffies;
      }

      spin_unlock_irq(&priv->lock);

      return;
 disable:
      hermes_set_irqmask(hw, 0);
      netif_device_detach(dev);
      printk(KERN_ERR "%s: Device has been disabled!\n", dev->name);
}

/********************************************************************/
/* Interrupt handler                                                */
/********************************************************************/

static void __orinoco_ev_tick(struct net_device *dev, hermes_t *hw)
{
      printk(KERN_DEBUG "%s: TICK\n", dev->name);
}

static void __orinoco_ev_wterr(struct net_device *dev, hermes_t *hw)
{
      /* This seems to happen a fair bit under load, but ignoring it
         seems to work fine...*/
      printk(KERN_DEBUG "%s: MAC controller error (WTERR). Ignoring.\n",
             dev->name);
}

irqreturn_t orinoco_interrupt(int irq, void *dev_id)
{
      struct net_device *dev = dev_id;
      struct orinoco_private *priv = netdev_priv(dev);
      hermes_t *hw = &priv->hw;
      int count = MAX_IRQLOOPS_PER_IRQ;
      u16 evstat, events;
      /* These are used to detect a runaway interrupt situation.
       *
       * If we get more than MAX_IRQLOOPS_PER_JIFFY iterations in a jiffy,
       * we panic and shut down the hardware
       */
      /* jiffies value the last time we were called */
      static int last_irq_jiffy; /* = 0 */
      static int loops_this_jiffy; /* = 0 */
      unsigned long flags;

      if (orinoco_lock(priv, &flags) != 0) {
            /* If hw is unavailable - we don't know if the irq was
             * for us or not */
            return IRQ_HANDLED;
      }

      evstat = hermes_read_regn(hw, EVSTAT);
      events = evstat & hw->inten;
      if (!events) {
            orinoco_unlock(priv, &flags);
            return IRQ_NONE;
      }

      if (jiffies != last_irq_jiffy)
            loops_this_jiffy = 0;
      last_irq_jiffy = jiffies;

      while (events && count--) {
            if (++loops_this_jiffy > MAX_IRQLOOPS_PER_JIFFY) {
                  printk(KERN_WARNING "%s: IRQ handler is looping too "
                         "much! Resetting.\n", dev->name);
                  /* Disable interrupts for now */
                  hermes_set_irqmask(hw, 0);
                  schedule_work(&priv->reset_work);
                  break;
            }

            /* Check the card hasn't been removed */
            if (!hermes_present(hw)) {
                  DEBUG(0, "orinoco_interrupt(): card removed\n");
                  break;
            }

            if (events & HERMES_EV_TICK)
                  __orinoco_ev_tick(dev, hw);
            if (events & HERMES_EV_WTERR)
                  __orinoco_ev_wterr(dev, hw);
            if (events & HERMES_EV_INFDROP)
                  __orinoco_ev_infdrop(dev, hw);
            if (events & HERMES_EV_INFO)
                  __orinoco_ev_info(dev, hw);
            if (events & HERMES_EV_RX)
                  __orinoco_ev_rx(dev, hw);
            if (events & HERMES_EV_TXEXC)
                  __orinoco_ev_txexc(dev, hw);
            if (events & HERMES_EV_TX)
                  __orinoco_ev_tx(dev, hw);
            if (events & HERMES_EV_ALLOC)
                  __orinoco_ev_alloc(dev, hw);

            hermes_write_regn(hw, EVACK, evstat);

            evstat = hermes_read_regn(hw, EVSTAT);
            events = evstat & hw->inten;
      };

      orinoco_unlock(priv, &flags);
      return IRQ_HANDLED;
}
EXPORT_SYMBOL(orinoco_interrupt);

/********************************************************************/
/* Power management                                                 */
/********************************************************************/
#if defined(CONFIG_PM_SLEEP) && !defined(CONFIG_HERMES_CACHE_FW_ON_INIT)
static int orinoco_pm_notifier(struct notifier_block *notifier,
                         unsigned long pm_event,
                         void *unused)
{
      struct orinoco_private *priv = container_of(notifier,
                                        struct orinoco_private,
                                        pm_notifier);

      /* All we need to do is cache the firmware before suspend, and
       * release it when we come out.
       *
       * Only need to do this if we're downloading firmware. */
      if (!priv->do_fw_download)
            return NOTIFY_DONE;

      switch (pm_event) {
      case PM_HIBERNATION_PREPARE:
      case PM_SUSPEND_PREPARE:
            orinoco_cache_fw(priv, 0);
            break;

      case PM_POST_RESTORE:
            /* Restore from hibernation failed. We need to clean
             * up in exactly the same way, so fall through. */
      case PM_POST_HIBERNATION:
      case PM_POST_SUSPEND:
            orinoco_uncache_fw(priv);
            break;

      case PM_RESTORE_PREPARE:
      default:
            break;
      }

      return NOTIFY_DONE;
}

static void orinoco_register_pm_notifier(struct orinoco_private *priv)
{
      priv->pm_notifier.notifier_call = orinoco_pm_notifier;
      register_pm_notifier(&priv->pm_notifier);
}

static void orinoco_unregister_pm_notifier(struct orinoco_private *priv)
{
      unregister_pm_notifier(&priv->pm_notifier);
}
#else /* !PM_SLEEP || HERMES_CACHE_FW_ON_INIT */
#define orinoco_register_pm_notifier(priv) do { } while(0)
#define orinoco_unregister_pm_notifier(priv) do { } while(0)
#endif

/********************************************************************/
/* Initialization                                                   */
/********************************************************************/

02099 struct comp_id {
      u16 id, variant, major, minor;
} __attribute__ ((packed));

static inline fwtype_t determine_firmware_type(struct comp_id *nic_id)
{
      if (nic_id->id < 0x8000)
            return FIRMWARE_TYPE_AGERE;
      else if (nic_id->id == 0x8000 && nic_id->major == 0)
            return FIRMWARE_TYPE_SYMBOL;
      else
            return FIRMWARE_TYPE_INTERSIL;
}

/* Set priv->firmware type, determine firmware properties */
static int determine_firmware(struct net_device *dev)
{
      struct orinoco_private *priv = netdev_priv(dev);
      hermes_t *hw = &priv->hw;
      int err;
      struct comp_id nic_id, sta_id;
      unsigned int firmver;
      char tmp[SYMBOL_MAX_VER_LEN+1] __attribute__((aligned(2)));

      /* Get the hardware version */
      err = HERMES_READ_RECORD(hw, USER_BAP, HERMES_RID_NICID, &nic_id);
      if (err) {
            printk(KERN_ERR "%s: Cannot read hardware identity: error %d\n",
                   dev->name, err);
            return err;
      }

      le16_to_cpus(&nic_id.id);
      le16_to_cpus(&nic_id.variant);
      le16_to_cpus(&nic_id.major);
      le16_to_cpus(&nic_id.minor);
      printk(KERN_DEBUG "%s: Hardware identity %04x:%04x:%04x:%04x\n",
             dev->name, nic_id.id, nic_id.variant,
             nic_id.major, nic_id.minor);

      priv->firmware_type = determine_firmware_type(&nic_id);

      /* Get the firmware version */
      err = HERMES_READ_RECORD(hw, USER_BAP, HERMES_RID_STAID, &sta_id);
      if (err) {
            printk(KERN_ERR "%s: Cannot read station identity: error %d\n",
                   dev->name, err);
            return err;
      }

      le16_to_cpus(&sta_id.id);
      le16_to_cpus(&sta_id.variant);
      le16_to_cpus(&sta_id.major);
      le16_to_cpus(&sta_id.minor);
      printk(KERN_DEBUG "%s: Station identity  %04x:%04x:%04x:%04x\n",
             dev->name, sta_id.id, sta_id.variant,
             sta_id.major, sta_id.minor);

      switch (sta_id.id) {
      case 0x15:
            printk(KERN_ERR "%s: Primary firmware is active\n",
                   dev->name);
            return -ENODEV;
      case 0x14b:
            printk(KERN_ERR "%s: Tertiary firmware is active\n",
                   dev->name);
            return -ENODEV;
      case 0x1f:  /* Intersil, Agere, Symbol Spectrum24 */
      case 0x21:  /* Symbol Spectrum24 Trilogy */
            break;
      default:
            printk(KERN_NOTICE "%s: Unknown station ID, please report\n",
                   dev->name);
            break;
      }

      /* Default capabilities */
      priv->has_sensitivity = 1;
      priv->has_mwo = 0;
      priv->has_preamble = 0;
      priv->has_port3 = 1;
      priv->has_ibss = 1;
      priv->has_wep = 0;
      priv->has_big_wep = 0;
      priv->has_alt_txcntl = 0;
      priv->has_ext_scan = 0;
      priv->has_wpa = 0;
      priv->do_fw_download = 0;

      /* Determine capabilities from the firmware version */
      switch (priv->firmware_type) {
      case FIRMWARE_TYPE_AGERE:
            /* Lucent Wavelan IEEE, Lucent Orinoco, Cabletron RoamAbout,
               ELSA, Melco, HP, IBM, Dell 1150, Compaq 110/210 */
            snprintf(priv->fw_name, sizeof(priv->fw_name) - 1,
                   "Lucent/Agere %d.%02d", sta_id.major, sta_id.minor);

            firmver = ((unsigned long)sta_id.major << 16) | sta_id.minor;

            priv->has_ibss = (firmver >= 0x60006);
            priv->has_wep = (firmver >= 0x40020);
            priv->has_big_wep = 1; /* FIXME: this is wrong - how do we tell
                                Gold cards from the others? */
            priv->has_mwo = (firmver >= 0x60000);
            priv->has_pm = (firmver >= 0x40020); /* Don't work in 7.52 ? */
            priv->ibss_port = 1;
            priv->has_hostscan = (firmver >= 0x8000a);
            priv->do_fw_download = 1;
            priv->broken_monitor = (firmver >= 0x80000);
            priv->has_alt_txcntl = (firmver >= 0x90000); /* All 9.x ? */
            priv->has_ext_scan = (firmver >= 0x90000); /* All 9.x ? */
            priv->has_wpa = (firmver >= 0x9002a);
            /* Tested with Agere firmware :
             *    1.16 ; 4.08 ; 4.52 ; 6.04 ; 6.16 ; 7.28 => Jean II
             * Tested CableTron firmware : 4.32 => Anton */
            break;
      case FIRMWARE_TYPE_SYMBOL:
            /* Symbol , 3Com AirConnect, Intel, Ericsson WLAN */
            /* Intel MAC : 00:02:B3:* */
            /* 3Com MAC : 00:50:DA:* */
            memset(tmp, 0, sizeof(tmp));
            /* Get the Symbol firmware version */
            err = hermes_read_ltv(hw, USER_BAP,
                              HERMES_RID_SECONDARYVERSION_SYMBOL,
                              SYMBOL_MAX_VER_LEN, NULL, &tmp);
            if (err) {
                  printk(KERN_WARNING
                         "%s: Error %d reading Symbol firmware info. "
                         "Wildly guessing capabilities...\n",
                         dev->name, err);
                  firmver = 0;
                  tmp[0] = '\0';
            } else {
                  /* The firmware revision is a string, the format is
                   * something like : "V2.20-01".
                   * Quick and dirty parsing... - Jean II
                   */
                  firmver = ((tmp[1] - '0') << 16)
                        | ((tmp[3] - '0') << 12)
                        | ((tmp[4] - '0') << 8)
                        | ((tmp[6] - '0') << 4)
                        | (tmp[7] - '0');

                  tmp[SYMBOL_MAX_VER_LEN] = '\0';
            }

            snprintf(priv->fw_name, sizeof(priv->fw_name) - 1,
                   "Symbol %s", tmp);

            priv->has_ibss = (firmver >= 0x20000);
            priv->has_wep = (firmver >= 0x15012);
            priv->has_big_wep = (firmver >= 0x20000);
            priv->has_pm = (firmver >= 0x20000 && firmver < 0x22000) ||
                         (firmver >= 0x29000 && firmver < 0x30000) ||
                         firmver >= 0x31000;
            priv->has_preamble = (firmver >= 0x20000);
            priv->ibss_port = 4;

            /* Symbol firmware is found on various cards, but
             * there has been no attempt to check firmware
             * download on non-spectrum_cs based cards.
             *
             * Given that the Agere firmware download works
             * differently, we should avoid doing a firmware
             * download with the Symbol algorithm on non-spectrum
             * cards.
             *
             * For now we can identify a spectrum_cs based card
             * because it has a firmware reset function.
             */
            priv->do_fw_download = (priv->stop_fw != NULL);

            priv->broken_disableport = (firmver == 0x25013) ||
                        (firmver >= 0x30000 && firmver <= 0x31000);
            priv->has_hostscan = (firmver >= 0x31001) ||
                             (firmver >= 0x29057 && firmver < 0x30000);
            /* Tested with Intel firmware : 0x20015 => Jean II */
            /* Tested with 3Com firmware : 0x15012 & 0x22001 => Jean II */
            break;
      case FIRMWARE_TYPE_INTERSIL:
            /* D-Link, Linksys, Adtron, ZoomAir, and many others...
             * Samsung, Compaq 100/200 and Proxim are slightly
             * different and less well tested */
            /* D-Link MAC : 00:40:05:* */
            /* Addtron MAC : 00:90:D1:* */
            snprintf(priv->fw_name, sizeof(priv->fw_name) - 1,
                   "Intersil %d.%d.%d", sta_id.major, sta_id.minor,
                   sta_id.variant);

            firmver = ((unsigned long)sta_id.major << 16) |
                  ((unsigned long)sta_id.minor << 8) | sta_id.variant;

            priv->has_ibss = (firmver >= 0x000700); /* FIXME */
            priv->has_big_wep = priv->has_wep = (firmver >= 0x000800);
            priv->has_pm = (firmver >= 0x000700);
            priv->has_hostscan = (firmver >= 0x010301);

            if (firmver >= 0x000800)
                  priv->ibss_port = 0;
            else {
                  printk(KERN_NOTICE "%s: Intersil firmware earlier "
                         "than v0.8.x - several features not supported\n",
                         dev->name);
                  priv->ibss_port = 1;
            }
            break;
      }
      printk(KERN_DEBUG "%s: Firmware determined as %s\n", dev->name,
             priv->fw_name);

      return 0;
}

static int orinoco_init(struct net_device *dev)
{
      struct orinoco_private *priv = netdev_priv(dev);
      hermes_t *hw = &priv->hw;
      int err = 0;
      struct hermes_idstring nickbuf;
      u16 reclen;
      int len;

      /* No need to lock, the hw_unavailable flag is already set in
       * alloc_orinocodev() */
      priv->nicbuf_size = IEEE80211_MAX_FRAME_LEN + ETH_HLEN;

      /* Initialize the firmware */
      err = hermes_init(hw);
      if (err != 0) {
            printk(KERN_ERR "%s: failed to initialize firmware (err = %d)\n",
                   dev->name, err);
            goto out;
      }

      err = determine_firmware(dev);
      if (err != 0) {
            printk(KERN_ERR "%s: Incompatible firmware, aborting\n",
                   dev->name);
            goto out;
      }

      if (priv->do_fw_download) {
#ifdef CONFIG_HERMES_CACHE_FW_ON_INIT
            orinoco_cache_fw(priv, 0);
#endif

            err = orinoco_download(priv);
            if (err)
                  priv->do_fw_download = 0;

            /* Check firmware version again */
            err = determine_firmware(dev);
            if (err != 0) {
                  printk(KERN_ERR "%s: Incompatible firmware, aborting\n",
                         dev->name);
                  goto out;
            }
      }

      if (priv->has_port3)
            printk(KERN_DEBUG "%s: Ad-hoc demo mode supported\n",
                   dev->name);
      if (priv->has_ibss)
            printk(KERN_DEBUG "%s: IEEE standard IBSS ad-hoc mode supported\n",
                   dev->name);
      if (priv->has_wep) {
            printk(KERN_DEBUG "%s: WEP supported, %s-bit key\n", dev->name,
                   priv->has_big_wep ? "104" : "40");
      }
      if (priv->has_wpa) {
            printk(KERN_DEBUG "%s: WPA-PSK supported\n", dev->name);
            if (orinoco_mic_init(priv)) {
                  printk(KERN_ERR "%s: Failed to setup MIC crypto "
                         "algorithm. Disabling WPA support\n", dev->name);
                  priv->has_wpa = 0;
            }
      }

      /* Now we have the firmware capabilities, allocate appropiate
       * sized scan buffers */
      if (orinoco_bss_data_allocate(priv))
            goto out;
      orinoco_bss_data_init(priv);

      /* Get the MAC address */
      err = hermes_read_ltv(hw, USER_BAP, HERMES_RID_CNFOWNMACADDR,
                        ETH_ALEN, NULL, dev->dev_addr);
      if (err) {
            printk(KERN_WARNING "%s: failed to read MAC address!\n",
                   dev->name);
            goto out;
      }

      printk(KERN_DEBUG "%s: MAC address %pM\n",
             dev->name, dev->dev_addr);

      /* Get the station name */
      err = hermes_read_ltv(hw, USER_BAP, HERMES_RID_CNFOWNNAME,
                        sizeof(nickbuf), &reclen, &nickbuf);
      if (err) {
            printk(KERN_ERR "%s: failed to read station name\n",
                   dev->name);
            goto out;
      }
      if (nickbuf.len)
            len = min(IW_ESSID_MAX_SIZE, (int)le16_to_cpu(nickbuf.len));
      else
            len = min(IW_ESSID_MAX_SIZE, 2 * reclen);
      memcpy(priv->nick, &nickbuf.val, len);
      priv->nick[len] = '\0';

      printk(KERN_DEBUG "%s: Station name \"%s\"\n", dev->name, priv->nick);

      err = orinoco_allocate_fid(dev);
      if (err) {
            printk(KERN_ERR "%s: failed to allocate NIC buffer!\n",
                   dev->name);
            goto out;
      }

      /* Get allowed channels */
      err = hermes_read_wordrec(hw, USER_BAP, HERMES_RID_CHANNELLIST,
                          &priv->channel_mask);
      if (err) {
            printk(KERN_ERR "%s: failed to read channel list!\n",
                   dev->name);
            goto out;
      }

      /* Get initial AP density */
      err = hermes_read_wordrec(hw, USER_BAP, HERMES_RID_CNFSYSTEMSCALE,
                          &priv->ap_density);
      if (err || priv->ap_density < 1 || priv->ap_density > 3)
            priv->has_sensitivity = 0;

      /* Get initial RTS threshold */
      err = hermes_read_wordrec(hw, USER_BAP, HERMES_RID_CNFRTSTHRESHOLD,
                          &priv->rts_thresh);
      if (err) {
            printk(KERN_ERR "%s: failed to read RTS threshold!\n",
                   dev->name);
            goto out;
      }

      /* Get initial fragmentation settings */
      if (priv->has_mwo)
            err = hermes_read_wordrec(hw, USER_BAP,
                                HERMES_RID_CNFMWOROBUST_AGERE,
                                &priv->mwo_robust);
      else
            err = hermes_read_wordrec(hw, USER_BAP,
                                HERMES_RID_CNFFRAGMENTATIONTHRESHOLD,
                                &priv->frag_thresh);
      if (err) {
            printk(KERN_ERR "%s: failed to read fragmentation settings!\n",
                   dev->name);
            goto out;
      }

      /* Power management setup */
      if (priv->has_pm) {
            priv->pm_on = 0;
            priv->pm_mcast = 1;
            err = hermes_read_wordrec(hw, USER_BAP,
                                HERMES_RID_CNFMAXSLEEPDURATION,
                                &priv->pm_period);
            if (err) {
                  printk(KERN_ERR "%s: failed to read power management period!\n",
                         dev->name);
                  goto out;
            }
            err = hermes_read_wordrec(hw, USER_BAP,
                                HERMES_RID_CNFPMHOLDOVERDURATION,
                                &priv->pm_timeout);
            if (err) {
                  printk(KERN_ERR "%s: failed to read power management timeout!\n",
                         dev->name);
                  goto out;
            }
      }

      /* Preamble setup */
      if (priv->has_preamble) {
            err = hermes_read_wordrec(hw, USER_BAP,
                                HERMES_RID_CNFPREAMBLE_SYMBOL,
                                &priv->preamble);
            if (err)
                  goto out;
      }

      /* Set up the default configuration */
      priv->iw_mode = IW_MODE_INFRA;
      /* By default use IEEE/IBSS ad-hoc mode if we have it */
      priv->prefer_port3 = priv->has_port3 && (!priv->has_ibss);
      set_port_type(priv);
      priv->channel = 0; /* use firmware default */

      priv->promiscuous = 0;
      priv->encode_alg = IW_ENCODE_ALG_NONE;
      priv->tx_key = 0;
      priv->wpa_enabled = 0;
      priv->tkip_cm_active = 0;
      priv->key_mgmt = 0;
      priv->wpa_ie_len = 0;
      priv->wpa_ie = NULL;

      /* Make the hardware available, as long as it hasn't been
       * removed elsewhere (e.g. by PCMCIA hot unplug) */
      spin_lock_irq(&priv->lock);
      priv->hw_unavailable--;
      spin_unlock_irq(&priv->lock);

      printk(KERN_DEBUG "%s: ready\n", dev->name);

 out:
      return err;
}

static const struct net_device_ops orinoco_netdev_ops = {
      .ndo_init         = orinoco_init,
      .ndo_open         = orinoco_open,
      .ndo_stop         = orinoco_stop,
      .ndo_start_xmit         = orinoco_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,
};

struct net_device
*alloc_orinocodev(int sizeof_card,
              struct device *device,
              int (*hard_reset)(struct orinoco_private *),
              int (*stop_fw)(struct orinoco_private *, int))
{
      struct net_device *dev;
      struct orinoco_private *priv;

      dev = alloc_etherdev(sizeof(struct orinoco_private) + sizeof_card);
      if (!dev)
            return NULL;
      priv = netdev_priv(dev);
      priv->ndev = dev;
      if (sizeof_card)
            priv->card = (void *)((unsigned long)priv
                              + sizeof(struct orinoco_private));
      else
            priv->card = NULL;
      priv->dev = device;

      /* Setup / override net_device fields */
      dev->netdev_ops = &orinoco_netdev_ops;
      dev->watchdog_timeo = HZ; /* 1 second timeout */
      dev->ethtool_ops = &orinoco_ethtool_ops;
      dev->wireless_handlers = &orinoco_handler_def;
#ifdef WIRELESS_SPY
      priv->wireless_data.spy_data = &priv->spy_data;
      dev->wireless_data = &priv->wireless_data;
#endif

      /* Reserve space in skb for the SNAP header */
      dev->hard_header_len += ENCAPS_OVERHEAD;

      /* Set up default callbacks */
      priv->hard_reset = hard_reset;
      priv->stop_fw = stop_fw;

      spin_lock_init(&priv->lock);
      priv->open = 0;
      priv->hw_unavailable = 1; /* orinoco_init() must clear this
                           * before anything else touches the
                           * hardware */
      INIT_WORK(&priv->reset_work, orinoco_reset);
      INIT_WORK(&priv->join_work, orinoco_join_ap);
      INIT_WORK(&priv->wevent_work, orinoco_send_wevents);

      INIT_LIST_HEAD(&priv->rx_list);
      tasklet_init(&priv->rx_tasklet, orinoco_rx_isr_tasklet,
                 (unsigned long) dev);

      netif_carrier_off(dev);
      priv->last_linkstatus = 0xffff;

#if defined(CONFIG_HERMES_CACHE_FW_ON_INIT) || defined(CONFIG_PM_SLEEP)
      priv->cached_pri_fw = NULL;
      priv->cached_fw = NULL;
#endif

      /* Register PM notifiers */
      orinoco_register_pm_notifier(priv);

      return dev;
}
EXPORT_SYMBOL(alloc_orinocodev);

void free_orinocodev(struct net_device *dev)
{
      struct orinoco_private *priv = netdev_priv(dev);
      struct orinoco_rx_data *rx_data, *temp;

      /* If the tasklet is scheduled when we call tasklet_kill it
       * will run one final time. However the tasklet will only
       * drain priv->rx_list if the hw is still available. */
      tasklet_kill(&priv->rx_tasklet);

      /* Explicitly drain priv->rx_list */
      list_for_each_entry_safe(rx_data, temp, &priv->rx_list, list) {
            list_del(&rx_data->list);

            dev_kfree_skb(rx_data->skb);
            kfree(rx_data->desc);
            kfree(rx_data);
      }

      orinoco_unregister_pm_notifier(priv);
      orinoco_uncache_fw(priv);

      priv->wpa_ie_len = 0;
      kfree(priv->wpa_ie);
      orinoco_mic_free(priv);
      orinoco_bss_data_free(priv);
      free_netdev(dev);
}
EXPORT_SYMBOL(free_orinocodev);

static void orinoco_get_drvinfo(struct net_device *dev,
                        struct ethtool_drvinfo *info)
{
      struct orinoco_private *priv = netdev_priv(dev);

      strncpy(info->driver, DRIVER_NAME, sizeof(info->driver) - 1);
      strncpy(info->version, DRIVER_VERSION, sizeof(info->version) - 1);
      strncpy(info->fw_version, priv->fw_name, sizeof(info->fw_version) - 1);
      if (dev->dev.parent)
            strncpy(info->bus_info, dev_name(dev->dev.parent),
                  sizeof(info->bus_info) - 1);
      else
            snprintf(info->bus_info, sizeof(info->bus_info) - 1,
                   "PCMCIA %p", priv->hw.iobase);
}

static const struct ethtool_ops orinoco_ethtool_ops = {
      .get_drvinfo = orinoco_get_drvinfo,
      .get_link = ethtool_op_get_link,
};

/********************************************************************/
/* Module initialization                                            */
/********************************************************************/

/* Can't be declared "const" or the whole __initdata section will
 * become const */
static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
      " (David Gibson <hermes@gibson.dropbear.id.au>, "
      "Pavel Roskin <proski@gnu.org>, et al)";

static int __init init_orinoco(void)
{
      printk(KERN_DEBUG "%s\n", version);
      return 0;
}

static void __exit exit_orinoco(void)
{
}

module_init(init_orinoco);
module_exit(exit_orinoco);

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