// SPDX-License-Identifier: (GPL-2.0 OR MPL-1.1)
/* src/prism2/driver/prism2sta.c
 *
 * Implements the station functionality for prism2
 *
 * Copyright (C) 1999 AbsoluteValue Systems, Inc.  All Rights Reserved.
 * --------------------------------------------------------------------
 *
 * linux-wlan
 *
 *   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 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.
 *
 * --------------------------------------------------------------------
 *
 * Inquiries regarding the linux-wlan Open Source project can be
 * made directly to:
 *
 * AbsoluteValue Systems Inc.
 * info@linux-wlan.com
 * http://www.linux-wlan.com
 *
 * --------------------------------------------------------------------
 *
 * Portions of the development of this software were funded by
 * Intersil Corporation as part of PRISM(R) chipset product development.
 *
 * --------------------------------------------------------------------
 *
 * This file implements the module and linux pcmcia routines for the
 * prism2 driver.
 *
 * --------------------------------------------------------------------
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/wireless.h>
#include <linux/netdevice.h>
#include <linux/workqueue.h>
#include <linux/byteorder/generic.h>
#include <linux/etherdevice.h>

#include <linux/io.h>
#include <linux/delay.h>
#include <asm/byteorder.h>
#include <linux/if_arp.h>
#include <linux/if_ether.h>
#include <linux/bitops.h>

#include "p80211types.h"
#include "p80211hdr.h"
#include "p80211mgmt.h"
#include "p80211conv.h"
#include "p80211msg.h"
#include "p80211netdev.h"
#include "p80211req.h"
#include "p80211metadef.h"
#include "p80211metastruct.h"
#include "hfa384x.h"
#include "prism2mgmt.h"

static char *dev_info = "prism2_usb";
static struct wlandevice *create_wlan(void);

int prism2_reset_holdtime = 30; /* Reset hold time in ms */
int prism2_reset_settletime = 100;      /* Reset settle time in ms */

static int prism2_doreset;      /* Do a reset at init? */

module_param(prism2_doreset, int, 0644);
MODULE_PARM_DESC(prism2_doreset, "Issue a reset on initialization");

module_param(prism2_reset_holdtime, int, 0644);
MODULE_PARM_DESC(prism2_reset_holdtime, "reset hold time in ms");
module_param(prism2_reset_settletime, int, 0644);
MODULE_PARM_DESC(prism2_reset_settletime, "reset settle time in ms");

MODULE_LICENSE("Dual MPL/GPL");

static int prism2sta_open(struct wlandevice *wlandev);
static int prism2sta_close(struct wlandevice *wlandev);
static void prism2sta_reset(struct wlandevice *wlandev);
static int prism2sta_txframe(struct wlandevice *wlandev, struct sk_buff *skb,
                             union p80211_hdr *p80211_hdr,
                             struct p80211_metawep *p80211_wep);
static int prism2sta_mlmerequest(struct wlandevice *wlandev,
                                 struct p80211msg *msg);
static int prism2sta_getcardinfo(struct wlandevice *wlandev);
static int prism2sta_globalsetup(struct wlandevice *wlandev);
static int prism2sta_setmulticast(struct wlandevice *wlandev,
                                  struct net_device *dev);

static void prism2sta_inf_handover(struct wlandevice *wlandev,
                                   struct hfa384x_inf_frame *inf);
static void prism2sta_inf_tallies(struct wlandevice *wlandev,
                                  struct hfa384x_inf_frame *inf);
static void prism2sta_inf_hostscanresults(struct wlandevice *wlandev,
                                          struct hfa384x_inf_frame *inf);
static void prism2sta_inf_scanresults(struct wlandevice *wlandev,
                                      struct hfa384x_inf_frame *inf);
static void prism2sta_inf_chinforesults(struct wlandevice *wlandev,
                                        struct hfa384x_inf_frame *inf);
static void prism2sta_inf_linkstatus(struct wlandevice *wlandev,
                                     struct hfa384x_inf_frame *inf);
static void prism2sta_inf_assocstatus(struct wlandevice *wlandev,
                                      struct hfa384x_inf_frame *inf);
static void prism2sta_inf_authreq(struct wlandevice *wlandev,
                                  struct hfa384x_inf_frame *inf);
static void prism2sta_inf_authreq_defer(struct wlandevice *wlandev,
                                        struct hfa384x_inf_frame *inf);
static void prism2sta_inf_psusercnt(struct wlandevice *wlandev,
                                    struct hfa384x_inf_frame *inf);

/*
 * prism2sta_open
 *
 * WLAN device open method.  Called from p80211netdev when kernel
 * device open (start) method is called in response to the
 * SIOCSIIFFLAGS ioctl changing the flags bit IFF_UP
 * from clear to set.
 *
 * Arguments:
 *      wlandev         wlan device structure
 *
 * Returns:
 *      0       success
 *      >0      f/w reported error
 *      <0      driver reported error
 *
 * Side effects:
 *
 * Call context:
 *      process thread
 */
static int prism2sta_open(struct wlandevice *wlandev)
{
        /* We don't currently have to do anything else.
         * The setup of the MAC should be subsequently completed via
         * the mlme commands.
         * Higher layers know we're ready from dev->start==1 and
         * dev->tbusy==0.  Our rx path knows to pass up received/
         * frames because of dev->flags&IFF_UP is true.
         */

        return 0;
}

/*
 * prism2sta_close
 *
 * WLAN device close method.  Called from p80211netdev when kernel
 * device close method is called in response to the
 * SIOCSIIFFLAGS ioctl changing the flags bit IFF_UP
 * from set to clear.
 *
 * Arguments:
 *      wlandev         wlan device structure
 *
 * Returns:
 *      0       success
 *      >0      f/w reported error
 *      <0      driver reported error
 *
 * Side effects:
 *
 * Call context:
 *      process thread
 */
static int prism2sta_close(struct wlandevice *wlandev)
{
        /* We don't currently have to do anything else.
         * Higher layers know we're not ready from dev->start==0 and
         * dev->tbusy==1.  Our rx path knows to not pass up received
         * frames because of dev->flags&IFF_UP is false.
         */

        return 0;
}

/*
 * prism2sta_reset
 *
 * Currently not implemented.
 *
 * Arguments:
 *      wlandev         wlan device structure
 *      none
 *
 * Returns:
 *      nothing
 *
 * Side effects:
 *
 * Call context:
 *      process thread
 */
static void prism2sta_reset(struct wlandevice *wlandev)
{
}

/*
 * prism2sta_txframe
 *
 * Takes a frame from p80211 and queues it for transmission.
 *
 * Arguments:
 *      wlandev         wlan device structure
 *      pb              packet buffer struct.  Contains an 802.11
 *                      data frame.
 *       p80211_hdr      points to the 802.11 header for the packet.
 * Returns:
 *      0               Success and more buffs available
 *      1               Success but no more buffs
 *      2               Allocation failure
 *      4               Buffer full or queue busy
 *
 * Side effects:
 *
 * Call context:
 *      process thread
 */
static int prism2sta_txframe(struct wlandevice *wlandev, struct sk_buff *skb,
                             union p80211_hdr *p80211_hdr,
                             struct p80211_metawep *p80211_wep)
{
        struct hfa384x *hw = wlandev->priv;

        /* If necessary, set the 802.11 WEP bit */
        if ((wlandev->hostwep & (HOSTWEP_PRIVACYINVOKED | HOSTWEP_ENCRYPT)) ==
            HOSTWEP_PRIVACYINVOKED) {
                p80211_hdr->a3.fc |= cpu_to_le16(WLAN_SET_FC_ISWEP(1));
        }

        return hfa384x_drvr_txframe(hw, skb, p80211_hdr, p80211_wep);
}

/*
 * prism2sta_mlmerequest
 *
 * wlan command message handler.  All we do here is pass the message
 * over to the prism2sta_mgmt_handler.
 *
 * Arguments:
 *      wlandev         wlan device structure
 *      msg             wlan command message
 * Returns:
 *      0               success
 *      <0              successful acceptance of message, but we're
 *                      waiting for an async process to finish before
 *                      we're done with the msg.  When the asynch
 *                      process is done, we'll call the p80211
 *                      function p80211req_confirm() .
 *      >0              An error occurred while we were handling
 *                      the message.
 *
 * Side effects:
 *
 * Call context:
 *      process thread
 */
static int prism2sta_mlmerequest(struct wlandevice *wlandev,
                                 struct p80211msg *msg)
{
        struct hfa384x *hw = wlandev->priv;

        int result = 0;

        switch (msg->msgcode) {
        case DIDMSG_DOT11REQ_MIBGET:
                pr_debug("Received mibget request\n");
                result = prism2mgmt_mibset_mibget(wlandev, msg);
                break;
        case DIDMSG_DOT11REQ_MIBSET:
                pr_debug("Received mibset request\n");
                result = prism2mgmt_mibset_mibget(wlandev, msg);
                break;
        case DIDMSG_DOT11REQ_SCAN:
                pr_debug("Received scan request\n");
                result = prism2mgmt_scan(wlandev, msg);
                break;
        case DIDMSG_DOT11REQ_SCAN_RESULTS:
                pr_debug("Received scan_results request\n");
                result = prism2mgmt_scan_results(wlandev, msg);
                break;
        case DIDMSG_DOT11REQ_START:
                pr_debug("Received mlme start request\n");
                result = prism2mgmt_start(wlandev, msg);
                break;
                /*
                 * Prism2 specific messages
                 */
        case DIDMSG_P2REQ_READPDA:
                pr_debug("Received mlme readpda request\n");
                result = prism2mgmt_readpda(wlandev, msg);
                break;
        case DIDMSG_P2REQ_RAMDL_STATE:
                pr_debug("Received mlme ramdl_state request\n");
                result = prism2mgmt_ramdl_state(wlandev, msg);
                break;
        case DIDMSG_P2REQ_RAMDL_WRITE:
                pr_debug("Received mlme ramdl_write request\n");
                result = prism2mgmt_ramdl_write(wlandev, msg);
                break;
        case DIDMSG_P2REQ_FLASHDL_STATE:
                pr_debug("Received mlme flashdl_state request\n");
                result = prism2mgmt_flashdl_state(wlandev, msg);
                break;
        case DIDMSG_P2REQ_FLASHDL_WRITE:
                pr_debug("Received mlme flashdl_write request\n");
                result = prism2mgmt_flashdl_write(wlandev, msg);
                break;
                /*
                 * Linux specific messages
                 */
        case DIDMSG_LNXREQ_HOSTWEP:
                break;          /* ignore me. */
        case DIDMSG_LNXREQ_IFSTATE: {
                struct p80211msg_lnxreq_ifstate *ifstatemsg;

                pr_debug("Received mlme ifstate request\n");
                ifstatemsg = (struct p80211msg_lnxreq_ifstate *)msg;
                result = prism2sta_ifstate(wlandev,
                                           ifstatemsg->ifstate.data);
                ifstatemsg->resultcode.status =
                        P80211ENUM_msgitem_status_data_ok;
                ifstatemsg->resultcode.data = result;
                result = 0;
                break;
        }
        case DIDMSG_LNXREQ_WLANSNIFF:
                pr_debug("Received mlme wlansniff request\n");
                result = prism2mgmt_wlansniff(wlandev, msg);
                break;
        case DIDMSG_LNXREQ_AUTOJOIN:
                pr_debug("Received mlme autojoin request\n");
                result = prism2mgmt_autojoin(wlandev, msg);
                break;
        case DIDMSG_LNXREQ_COMMSQUALITY: {
                struct p80211msg_lnxreq_commsquality *qualmsg;

                pr_debug("Received commsquality request\n");

                qualmsg = (struct p80211msg_lnxreq_commsquality *)msg;

                qualmsg->link.status = P80211ENUM_msgitem_status_data_ok;
                qualmsg->level.status = P80211ENUM_msgitem_status_data_ok;
                qualmsg->noise.status = P80211ENUM_msgitem_status_data_ok;

                qualmsg->link.data = le16_to_cpu(hw->qual.cq_curr_bss);
                qualmsg->level.data = le16_to_cpu(hw->qual.asl_curr_bss);
                qualmsg->noise.data = le16_to_cpu(hw->qual.anl_curr_fc);
                qualmsg->txrate.data = hw->txrate;

                break;
        }
        default:
                netdev_warn(wlandev->netdev,
                            "Unknown mgmt request message 0x%08x",
                            msg->msgcode);
                break;
        }

        return result;
}

/*
 * prism2sta_ifstate
 *
 * Interface state.  This is the primary WLAN interface enable/disable
 * handler.  Following the driver/load/deviceprobe sequence, this
 * function must be called with a state of "enable" before any other
 * commands will be accepted.
 *
 * Arguments:
 *      wlandev         wlan device structure
 *      msgp            ptr to msg buffer
 *
 * Returns:
 *      A p80211 message resultcode value.
 *
 * Side effects:
 *
 * Call context:
 *      process thread  (usually)
 *      interrupt
 */
u32 prism2sta_ifstate(struct wlandevice *wlandev, u32 ifstate)
{
        struct hfa384x *hw = wlandev->priv;
        u32 result;

        result = P80211ENUM_resultcode_implementation_failure;

        pr_debug("Current MSD state(%d), requesting(%d)\n",
                 wlandev->msdstate, ifstate);
        switch (ifstate) {
        case P80211ENUM_ifstate_fwload:
                switch (wlandev->msdstate) {
                case WLAN_MSD_HWPRESENT:
                        wlandev->msdstate = WLAN_MSD_FWLOAD_PENDING;
                        /*
                         * Initialize the device+driver sufficiently
                         * for firmware loading.
                         */
                        result = hfa384x_drvr_start(hw);
                        if (result) {
                                netdev_err(wlandev->netdev,
                                           "hfa384x_drvr_start() failed,result=%d\n",
                                           (int)result);
                                result =
                                 P80211ENUM_resultcode_implementation_failure;
                                wlandev->msdstate = WLAN_MSD_HWPRESENT;
                                break;
                        }
                        wlandev->msdstate = WLAN_MSD_FWLOAD;
                        result = P80211ENUM_resultcode_success;
                        break;
                case WLAN_MSD_FWLOAD:
                        hfa384x_cmd_initialize(hw);
                        result = P80211ENUM_resultcode_success;
                        break;
                case WLAN_MSD_RUNNING:
                        netdev_warn(wlandev->netdev,
                                    "Cannot enter fwload state from enable state, you must disable first.\n");
                        result = P80211ENUM_resultcode_invalid_parameters;
                        break;
                case WLAN_MSD_HWFAIL:
                default:
                        /* probe() had a problem or the msdstate contains
                         * an unrecognized value, there's nothing we can do.
                         */
                        result = P80211ENUM_resultcode_implementation_failure;
                        break;
                }
                break;
        case P80211ENUM_ifstate_enable:
                switch (wlandev->msdstate) {
                case WLAN_MSD_HWPRESENT:
                case WLAN_MSD_FWLOAD:
                        wlandev->msdstate = WLAN_MSD_RUNNING_PENDING;
                        /* Initialize the device+driver for full
                         * operation. Note that this might me an FWLOAD to
                         * to RUNNING transition so we must not do a chip
                         * or board level reset.  Note that on failure,
                         * the MSD state is set to HWPRESENT because we
                         * can't make any assumptions about the state
                         * of the hardware or a previous firmware load.
                         */
                        result = hfa384x_drvr_start(hw);
                        if (result) {
                                netdev_err(wlandev->netdev,
                                           "hfa384x_drvr_start() failed,result=%d\n",
                                           (int)result);
                                result =
                                  P80211ENUM_resultcode_implementation_failure;
                                wlandev->msdstate = WLAN_MSD_HWPRESENT;
                                break;
                        }

                        result = prism2sta_getcardinfo(wlandev);
                        if (result) {
                                netdev_err(wlandev->netdev,
                                           "prism2sta_getcardinfo() failed,result=%d\n",
                                           (int)result);
                                result =
                                  P80211ENUM_resultcode_implementation_failure;
                                hfa384x_drvr_stop(hw);
                                wlandev->msdstate = WLAN_MSD_HWPRESENT;
                                break;
                        }
                        result = prism2sta_globalsetup(wlandev);
                        if (result) {
                                netdev_err(wlandev->netdev,
                                           "prism2sta_globalsetup() failed,result=%d\n",
                                           (int)result);
                                result =
                                  P80211ENUM_resultcode_implementation_failure;
                                hfa384x_drvr_stop(hw);
                                wlandev->msdstate = WLAN_MSD_HWPRESENT;
                                break;
                        }
                        wlandev->msdstate = WLAN_MSD_RUNNING;
                        hw->join_ap = 0;
                        hw->join_retries = 60;
                        result = P80211ENUM_resultcode_success;
                        break;
                case WLAN_MSD_RUNNING:
                        /* Do nothing, we're already in this state. */
                        result = P80211ENUM_resultcode_success;
                        break;
                case WLAN_MSD_HWFAIL:
                default:
                        /* probe() had a problem or the msdstate contains
                         * an unrecognized value, there's nothing we can do.
                         */
                        result = P80211ENUM_resultcode_implementation_failure;
                        break;
                }
                break;
        case P80211ENUM_ifstate_disable:
                switch (wlandev->msdstate) {
                case WLAN_MSD_HWPRESENT:
                        /* Do nothing, we're already in this state. */
                        result = P80211ENUM_resultcode_success;
                        break;
                case WLAN_MSD_FWLOAD:
                case WLAN_MSD_RUNNING:
                        wlandev->msdstate = WLAN_MSD_HWPRESENT_PENDING;
                        /*
                         * TODO: Shut down the MAC completely. Here a chip
                         * or board level reset is probably called for.
                         * After a "disable" _all_ results are lost, even
                         * those from a fwload.
                         */
                        if (!wlandev->hwremoved)
                                netif_carrier_off(wlandev->netdev);

                        hfa384x_drvr_stop(hw);

                        wlandev->macmode = WLAN_MACMODE_NONE;
                        wlandev->msdstate = WLAN_MSD_HWPRESENT;
                        result = P80211ENUM_resultcode_success;
                        break;
                case WLAN_MSD_HWFAIL:
                default:
                        /* probe() had a problem or the msdstate contains
                         * an unrecognized value, there's nothing we can do.
                         */
                        result = P80211ENUM_resultcode_implementation_failure;
                        break;
                }
                break;
        default:
                result = P80211ENUM_resultcode_invalid_parameters;
                break;
        }

        return result;
}

/*
 * prism2sta_getcardinfo
 *
 * Collect the NICID, firmware version and any other identifiers
 * we'd like to have in host-side data structures.
 *
 * Arguments:
 *      wlandev         wlan device structure
 *
 * Returns:
 *      0       success
 *      >0      f/w reported error
 *      <0      driver reported error
 *
 * Side effects:
 *
 * Call context:
 *      Either.
 */
static int prism2sta_getcardinfo(struct wlandevice *wlandev)
{
        int result = 0;
        struct hfa384x *hw = wlandev->priv;
        u16 temp;
        u8 snum[HFA384x_RID_NICSERIALNUMBER_LEN];

        /* Collect version and compatibility info */
        /*  Some are critical, some are not */
        /* NIC identity */
        result = hfa384x_drvr_getconfig(hw, HFA384x_RID_NICIDENTITY,
                                        &hw->ident_nic,
                                        sizeof(struct hfa384x_compident));
        if (result) {
                netdev_err(wlandev->netdev, "Failed to retrieve NICIDENTITY\n");
                goto failed;
        }

        /* get all the nic id fields in host byte order */
        le16_to_cpus(&hw->ident_nic.id);
        le16_to_cpus(&hw->ident_nic.variant);
        le16_to_cpus(&hw->ident_nic.major);
        le16_to_cpus(&hw->ident_nic.minor);

        netdev_info(wlandev->netdev, "ident: nic h/w: id=0x%02x %d.%d.%d\n",
                    hw->ident_nic.id, hw->ident_nic.major,
                    hw->ident_nic.minor, hw->ident_nic.variant);

        /* Primary f/w identity */
        result = hfa384x_drvr_getconfig(hw, HFA384x_RID_PRIIDENTITY,
                                        &hw->ident_pri_fw,
                                        sizeof(struct hfa384x_compident));
        if (result) {
                netdev_err(wlandev->netdev, "Failed to retrieve PRIIDENTITY\n");
                goto failed;
        }

        /* get all the private fw id fields in host byte order */
        le16_to_cpus(&hw->ident_pri_fw.id);
        le16_to_cpus(&hw->ident_pri_fw.variant);
        le16_to_cpus(&hw->ident_pri_fw.major);
        le16_to_cpus(&hw->ident_pri_fw.minor);

        netdev_info(wlandev->netdev, "ident: pri f/w: id=0x%02x %d.%d.%d\n",
                    hw->ident_pri_fw.id, hw->ident_pri_fw.major,
                    hw->ident_pri_fw.minor, hw->ident_pri_fw.variant);

        /* Station (Secondary?) f/w identity */
        result = hfa384x_drvr_getconfig(hw, HFA384x_RID_STAIDENTITY,
                                        &hw->ident_sta_fw,
                                        sizeof(struct hfa384x_compident));
        if (result) {
                netdev_err(wlandev->netdev, "Failed to retrieve STAIDENTITY\n");
                goto failed;
        }

        if (hw->ident_nic.id < 0x8000) {
                netdev_err(wlandev->netdev,
                           "FATAL: Card is not an Intersil Prism2/2.5/3\n");
                result = -1;
                goto failed;
        }

        /* get all the station fw id fields in host byte order */
        le16_to_cpus(&hw->ident_sta_fw.id);
        le16_to_cpus(&hw->ident_sta_fw.variant);
        le16_to_cpus(&hw->ident_sta_fw.major);
        le16_to_cpus(&hw->ident_sta_fw.minor);

        /* strip out the 'special' variant bits */
        hw->mm_mods = hw->ident_sta_fw.variant & GENMASK(15, 14);
        hw->ident_sta_fw.variant &= ~((u16)GENMASK(15, 14));

        if (hw->ident_sta_fw.id == 0x1f) {
                netdev_info(wlandev->netdev,
                            "ident: sta f/w: id=0x%02x %d.%d.%d\n",
                            hw->ident_sta_fw.id, hw->ident_sta_fw.major,
                            hw->ident_sta_fw.minor, hw->ident_sta_fw.variant);
        } else {
                netdev_info(wlandev->netdev,
                            "ident:  ap f/w: id=0x%02x %d.%d.%d\n",
                            hw->ident_sta_fw.id, hw->ident_sta_fw.major,
                            hw->ident_sta_fw.minor, hw->ident_sta_fw.variant);
                netdev_err(wlandev->netdev, "Unsupported Tertiary AP firmware loaded!\n");
                goto failed;
        }

        /* Compatibility range, Modem supplier */
        result = hfa384x_drvr_getconfig(hw, HFA384x_RID_MFISUPRANGE,
                                        &hw->cap_sup_mfi,
                                        sizeof(struct hfa384x_caplevel));
        if (result) {
                netdev_err(wlandev->netdev, "Failed to retrieve MFISUPRANGE\n");
                goto failed;
        }

        /* get all the Compatibility range, modem interface supplier
         * fields in byte order
         */
        le16_to_cpus(&hw->cap_sup_mfi.role);
        le16_to_cpus(&hw->cap_sup_mfi.id);
        le16_to_cpus(&hw->cap_sup_mfi.variant);
        le16_to_cpus(&hw->cap_sup_mfi.bottom);
        le16_to_cpus(&hw->cap_sup_mfi.top);

        netdev_info(wlandev->netdev,
                    "MFI:SUP:role=0x%02x:id=0x%02x:var=0x%02x:b/t=%d/%d\n",
                    hw->cap_sup_mfi.role, hw->cap_sup_mfi.id,
                    hw->cap_sup_mfi.variant, hw->cap_sup_mfi.bottom,
                    hw->cap_sup_mfi.top);

        /* Compatibility range, Controller supplier */
        result = hfa384x_drvr_getconfig(hw, HFA384x_RID_CFISUPRANGE,
                                        &hw->cap_sup_cfi,
                                        sizeof(struct hfa384x_caplevel));
        if (result) {
                netdev_err(wlandev->netdev, "Failed to retrieve CFISUPRANGE\n");
                goto failed;
        }

        /* get all the Compatibility range, controller interface supplier
         * fields in byte order
         */
        le16_to_cpus(&hw->cap_sup_cfi.role);
        le16_to_cpus(&hw->cap_sup_cfi.id);
        le16_to_cpus(&hw->cap_sup_cfi.variant);
        le16_to_cpus(&hw->cap_sup_cfi.bottom);
        le16_to_cpus(&hw->cap_sup_cfi.top);

        netdev_info(wlandev->netdev,
                    "CFI:SUP:role=0x%02x:id=0x%02x:var=0x%02x:b/t=%d/%d\n",
                    hw->cap_sup_cfi.role, hw->cap_sup_cfi.id,
                    hw->cap_sup_cfi.variant, hw->cap_sup_cfi.bottom,
                    hw->cap_sup_cfi.top);

        /* Compatibility range, Primary f/w supplier */
        result = hfa384x_drvr_getconfig(hw, HFA384x_RID_PRISUPRANGE,
                                        &hw->cap_sup_pri,
                                        sizeof(struct hfa384x_caplevel));
        if (result) {
                netdev_err(wlandev->netdev, "Failed to retrieve PRISUPRANGE\n");
                goto failed;
        }

        /* get all the Compatibility range, primary firmware supplier
         * fields in byte order
         */
        le16_to_cpus(&hw->cap_sup_pri.role);
        le16_to_cpus(&hw->cap_sup_pri.id);
        le16_to_cpus(&hw->cap_sup_pri.variant);
        le16_to_cpus(&hw->cap_sup_pri.bottom);
        le16_to_cpus(&hw->cap_sup_pri.top);

        netdev_info(wlandev->netdev,
                    "PRI:SUP:role=0x%02x:id=0x%02x:var=0x%02x:b/t=%d/%d\n",
                    hw->cap_sup_pri.role, hw->cap_sup_pri.id,
                    hw->cap_sup_pri.variant, hw->cap_sup_pri.bottom,
                    hw->cap_sup_pri.top);

        /* Compatibility range, Station f/w supplier */
        result = hfa384x_drvr_getconfig(hw, HFA384x_RID_STASUPRANGE,
                                        &hw->cap_sup_sta,
                                        sizeof(struct hfa384x_caplevel));
        if (result) {
                netdev_err(wlandev->netdev, "Failed to retrieve STASUPRANGE\n");
                goto failed;
        }

        /* get all the Compatibility range, station firmware supplier
         * fields in byte order
         */
        le16_to_cpus(&hw->cap_sup_sta.role);
        le16_to_cpus(&hw->cap_sup_sta.id);
        le16_to_cpus(&hw->cap_sup_sta.variant);
        le16_to_cpus(&hw->cap_sup_sta.bottom);
        le16_to_cpus(&hw->cap_sup_sta.top);

        if (hw->cap_sup_sta.id == 0x04) {
                netdev_info(wlandev->netdev,
                            "STA:SUP:role=0x%02x:id=0x%02x:var=0x%02x:b/t=%d/%d\n",
                            hw->cap_sup_sta.role, hw->cap_sup_sta.id,
                            hw->cap_sup_sta.variant, hw->cap_sup_sta.bottom,
                            hw->cap_sup_sta.top);
        } else {
                netdev_info(wlandev->netdev,
                            "AP:SUP:role=0x%02x:id=0x%02x:var=0x%02x:b/t=%d/%d\n",
                            hw->cap_sup_sta.role, hw->cap_sup_sta.id,
                            hw->cap_sup_sta.variant, hw->cap_sup_sta.bottom,
                            hw->cap_sup_sta.top);
        }

        /* Compatibility range, primary f/w actor, CFI supplier */
        result = hfa384x_drvr_getconfig(hw, HFA384x_RID_PRI_CFIACTRANGES,
                                        &hw->cap_act_pri_cfi,
                                        sizeof(struct hfa384x_caplevel));
        if (result) {
                netdev_err(wlandev->netdev, "Failed to retrieve PRI_CFIACTRANGES\n");
                goto failed;
        }

        /* get all the Compatibility range, primary f/w actor, CFI supplier
         * fields in byte order
         */
        le16_to_cpus(&hw->cap_act_pri_cfi.role);
        le16_to_cpus(&hw->cap_act_pri_cfi.id);
        le16_to_cpus(&hw->cap_act_pri_cfi.variant);
        le16_to_cpus(&hw->cap_act_pri_cfi.bottom);
        le16_to_cpus(&hw->cap_act_pri_cfi.top);

        netdev_info(wlandev->netdev,
                    "PRI-CFI:ACT:role=0x%02x:id=0x%02x:var=0x%02x:b/t=%d/%d\n",
                    hw->cap_act_pri_cfi.role, hw->cap_act_pri_cfi.id,
                    hw->cap_act_pri_cfi.variant, hw->cap_act_pri_cfi.bottom,
                    hw->cap_act_pri_cfi.top);

        /* Compatibility range, sta f/w actor, CFI supplier */
        result = hfa384x_drvr_getconfig(hw, HFA384x_RID_STA_CFIACTRANGES,
                                        &hw->cap_act_sta_cfi,
                                        sizeof(struct hfa384x_caplevel));
        if (result) {
                netdev_err(wlandev->netdev, "Failed to retrieve STA_CFIACTRANGES\n");
                goto failed;
        }

        /* get all the Compatibility range, station f/w actor, CFI supplier
         * fields in byte order
         */
        le16_to_cpus(&hw->cap_act_sta_cfi.role);
        le16_to_cpus(&hw->cap_act_sta_cfi.id);
        le16_to_cpus(&hw->cap_act_sta_cfi.variant);
        le16_to_cpus(&hw->cap_act_sta_cfi.bottom);
        le16_to_cpus(&hw->cap_act_sta_cfi.top);

        netdev_info(wlandev->netdev,
                    "STA-CFI:ACT:role=0x%02x:id=0x%02x:var=0x%02x:b/t=%d/%d\n",
                    hw->cap_act_sta_cfi.role, hw->cap_act_sta_cfi.id,
                    hw->cap_act_sta_cfi.variant, hw->cap_act_sta_cfi.bottom,
                    hw->cap_act_sta_cfi.top);

        /* Compatibility range, sta f/w actor, MFI supplier */
        result = hfa384x_drvr_getconfig(hw, HFA384x_RID_STA_MFIACTRANGES,
                                        &hw->cap_act_sta_mfi,
                                        sizeof(struct hfa384x_caplevel));
        if (result) {
                netdev_err(wlandev->netdev, "Failed to retrieve STA_MFIACTRANGES\n");
                goto failed;
        }

        /* get all the Compatibility range, station f/w actor, MFI supplier
         * fields in byte order
         */
        le16_to_cpus(&hw->cap_act_sta_mfi.role);
        le16_to_cpus(&hw->cap_act_sta_mfi.id);
        le16_to_cpus(&hw->cap_act_sta_mfi.variant);
        le16_to_cpus(&hw->cap_act_sta_mfi.bottom);
        le16_to_cpus(&hw->cap_act_sta_mfi.top);

        netdev_info(wlandev->netdev,
                    "STA-MFI:ACT:role=0x%02x:id=0x%02x:var=0x%02x:b/t=%d/%d\n",
                    hw->cap_act_sta_mfi.role, hw->cap_act_sta_mfi.id,
                    hw->cap_act_sta_mfi.variant, hw->cap_act_sta_mfi.bottom,
                    hw->cap_act_sta_mfi.top);

        /* Serial Number */
        result = hfa384x_drvr_getconfig(hw, HFA384x_RID_NICSERIALNUMBER,
                                        snum, HFA384x_RID_NICSERIALNUMBER_LEN);
        if (!result) {
                netdev_info(wlandev->netdev, "Prism2 card SN: %*pEhp\n",
                            HFA384x_RID_NICSERIALNUMBER_LEN, snum);
        } else {
                netdev_err(wlandev->netdev, "Failed to retrieve Prism2 Card SN\n");
                goto failed;
        }

        /* Collect the MAC address */
        result = hfa384x_drvr_getconfig(hw, HFA384x_RID_CNFOWNMACADDR,
                                        wlandev->netdev->dev_addr, ETH_ALEN);
        if (result != 0) {
                netdev_err(wlandev->netdev, "Failed to retrieve mac address\n");
                goto failed;
        }

        /* short preamble is always implemented */
        wlandev->nsdcaps |= P80211_NSDCAP_SHORT_PREAMBLE;

        /* find out if hardware wep is implemented */
        hfa384x_drvr_getconfig16(hw, HFA384x_RID_PRIVACYOPTIMP, &temp);
        if (temp)
                wlandev->nsdcaps |= P80211_NSDCAP_HARDWAREWEP;

        /* get the dBm Scaling constant */
        hfa384x_drvr_getconfig16(hw, HFA384x_RID_CNFDBMADJUST, &temp);
        hw->dbmadjust = temp;

        /* Only enable scan by default on newer firmware */
        if (HFA384x_FIRMWARE_VERSION(hw->ident_sta_fw.major,
                                     hw->ident_sta_fw.minor,
                                     hw->ident_sta_fw.variant) <
            HFA384x_FIRMWARE_VERSION(1, 5, 5)) {
                wlandev->nsdcaps |= P80211_NSDCAP_NOSCAN;
        }

        /* TODO: Set any internally managed config items */

        goto done;
failed:
        netdev_err(wlandev->netdev, "Failed, result=%d\n", result);
done:
        return result;
}

/*
 * prism2sta_globalsetup
 *
 * Set any global RIDs that we want to set at device activation.
 *
 * Arguments:
 *      wlandev         wlan device structure
 *
 * Returns:
 *      0       success
 *      >0      f/w reported error
 *      <0      driver reported error
 *
 * Side effects:
 *
 * Call context:
 *      process thread
 */
static int prism2sta_globalsetup(struct wlandevice *wlandev)
{
        struct hfa384x *hw = wlandev->priv;

        /* Set the maximum frame size */
        return hfa384x_drvr_setconfig16(hw, HFA384x_RID_CNFMAXDATALEN,
                                        WLAN_DATA_MAXLEN);
}

static int prism2sta_setmulticast(struct wlandevice *wlandev,
                                  struct net_device *dev)
{
        int result = 0;
        struct hfa384x *hw = wlandev->priv;

        u16 promisc;

        /* If we're not ready, what's the point? */
        if (hw->state != HFA384x_STATE_RUNNING)
                goto exit;

        if ((dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) != 0)
                promisc = P80211ENUM_truth_true;
        else
                promisc = P80211ENUM_truth_false;

        result =
            hfa384x_drvr_setconfig16_async(hw, HFA384x_RID_PROMISCMODE,
                                           promisc);
exit:
        return result;
}

/*
 * prism2sta_inf_handover
 *
 * Handles the receipt of a Handover info frame. Should only be present
 * in APs only.
 *
 * Arguments:
 *      wlandev         wlan device structure
 *      inf             ptr to info frame (contents in hfa384x order)
 *
 * Returns:
 *      nothing
 *
 * Side effects:
 *
 * Call context:
 *      interrupt
 */
static void prism2sta_inf_handover(struct wlandevice *wlandev,
                                   struct hfa384x_inf_frame *inf)
{
        pr_debug("received infoframe:HANDOVER (unhandled)\n");
}

/*
 * prism2sta_inf_tallies
 *
 * Handles the receipt of a CommTallies info frame.
 *
 * Arguments:
 *      wlandev         wlan device structure
 *      inf             ptr to info frame (contents in hfa384x order)
 *
 * Returns:
 *      nothing
 *
 * Side effects:
 *
 * Call context:
 *      interrupt
 */
static void prism2sta_inf_tallies(struct wlandevice *wlandev,
                                  struct hfa384x_inf_frame *inf)
{
        struct hfa384x *hw = wlandev->priv;
        __le16 *src16;
        u32 *dst;
        __le32 *src32;
        int i;
        int cnt;

        /*
         * Determine if these are 16-bit or 32-bit tallies, based on the
         * record length of the info record.
         */

        cnt = sizeof(struct hfa384x_comm_tallies_32) / sizeof(u32);

        if (inf->framelen > 22) {
                dst = (u32 *)&hw->tallies;
                src32 = (__le32 *)&inf->info.commtallies32;
                for (i = 0; i < cnt; i++, dst++, src32++)
                        *dst += le32_to_cpu(*src32);
        } else {
                dst = (u32 *)&hw->tallies;
                src16 = (__le16 *)&inf->info.commtallies16;
                for (i = 0; i < cnt; i++, dst++, src16++)
                        *dst += le16_to_cpu(*src16);
        }
}

/*
 * prism2sta_inf_scanresults
 *
 * Handles the receipt of a Scan Results info frame.
 *
 * Arguments:
 *      wlandev         wlan device structure
 *      inf             ptr to info frame (contents in hfa384x order)
 *
 * Returns:
 *      nothing
 *
 * Side effects:
 *
 * Call context:
 *      interrupt
 */
static void prism2sta_inf_scanresults(struct wlandevice *wlandev,
                                      struct hfa384x_inf_frame *inf)
{
        struct hfa384x *hw = wlandev->priv;
        int nbss;
        struct hfa384x_scan_result *sr = &inf->info.scanresult;
        int i;
        struct hfa384x_join_request_data joinreq;
        int result;

        /* Get the number of results, first in bytes, then in results */
        nbss = (inf->framelen * sizeof(u16)) -
            sizeof(inf->infotype) - sizeof(inf->info.scanresult.scanreason);
        nbss /= sizeof(struct hfa384x_scan_result_sub);

        /* Print em */
        pr_debug("rx scanresults, reason=%d, nbss=%d:\n",
                 inf->info.scanresult.scanreason, nbss);
        for (i = 0; i < nbss; i++) {
                pr_debug("chid=%d anl=%d sl=%d bcnint=%d\n",
                         sr->result[i].chid,
                         sr->result[i].anl,
                         sr->result[i].sl, sr->result[i].bcnint);
                pr_debug("  capinfo=0x%04x proberesp_rate=%d\n",
                         sr->result[i].capinfo, sr->result[i].proberesp_rate);
        }
        /* issue a join request */
        joinreq.channel = sr->result[0].chid;
        memcpy(joinreq.bssid, sr->result[0].bssid, WLAN_BSSID_LEN);
        result = hfa384x_drvr_setconfig(hw,
                                        HFA384x_RID_JOINREQUEST,
                                        &joinreq, HFA384x_RID_JOINREQUEST_LEN);
        if (result) {
                netdev_err(wlandev->netdev, "setconfig(joinreq) failed, result=%d\n",
                           result);
        }
}

/*
 * prism2sta_inf_hostscanresults
 *
 * Handles the receipt of a Scan Results info frame.
 *
 * Arguments:
 *      wlandev         wlan device structure
 *      inf             ptr to info frame (contents in hfa384x order)
 *
 * Returns:
 *      nothing
 *
 * Side effects:
 *
 * Call context:
 *      interrupt
 */
static void prism2sta_inf_hostscanresults(struct wlandevice *wlandev,
                                          struct hfa384x_inf_frame *inf)
{
        struct hfa384x *hw = wlandev->priv;
        int nbss;

        nbss = (inf->framelen - 3) / 32;
        pr_debug("Received %d hostscan results\n", nbss);

        if (nbss > 32)
                nbss = 32;

        kfree(hw->scanresults);

        hw->scanresults = kmemdup(inf, sizeof(*inf), GFP_ATOMIC);

        if (nbss == 0)
                nbss = -1;

        /* Notify/wake the sleeping caller. */
        hw->scanflag = nbss;
        wake_up_interruptible(&hw->cmdq);
};

/*
 * prism2sta_inf_chinforesults
 *
 * Handles the receipt of a Channel Info Results info frame.
 *
 * Arguments:
 *      wlandev         wlan device structure
 *      inf             ptr to info frame (contents in hfa384x order)
 *
 * Returns:
 *      nothing
 *
 * Side effects:
 *
 * Call context:
 *      interrupt
 */
static void prism2sta_inf_chinforesults(struct wlandevice *wlandev,
                                        struct hfa384x_inf_frame *inf)
{
        struct hfa384x *hw = wlandev->priv;
        unsigned int i, n;

        hw->channel_info.results.scanchannels =
            inf->info.chinforesult.scanchannels;

        for (i = 0, n = 0; i < HFA384x_CHINFORESULT_MAX; i++) {
                struct hfa384x_ch_info_result_sub *result;
                struct hfa384x_ch_info_result_sub *chinforesult;
                int chan;

                if (!(hw->channel_info.results.scanchannels & (1 << i)))
                        continue;

                result = &inf->info.chinforesult.result[n];
                chan = result->chid - 1;

                if (chan < 0 || chan >= HFA384x_CHINFORESULT_MAX)
                        continue;

                chinforesult = &hw->channel_info.results.result[chan];
                chinforesult->chid = chan;
                chinforesult->anl = result->anl;
                chinforesult->pnl = result->pnl;
                chinforesult->active = result->active;

                pr_debug("chinfo: channel %d, %s level (avg/peak)=%d/%d dB, pcf %d\n",
                         chan + 1,
                         (chinforesult->active & HFA384x_CHINFORESULT_BSSACTIVE)
                                ? "signal" : "noise",
                         chinforesult->anl, chinforesult->pnl,
                         (chinforesult->active & HFA384x_CHINFORESULT_PCFACTIVE)
                                ? 1 : 0);
                n++;
        }
        atomic_set(&hw->channel_info.done, 2);

        hw->channel_info.count = n;
}

void prism2sta_processing_defer(struct work_struct *data)
{
        struct hfa384x *hw = container_of(data, struct hfa384x, link_bh);
        struct wlandevice *wlandev = hw->wlandev;
        struct hfa384x_bytestr32 ssid;
        int result;

        /* First let's process the auth frames */
        {
                struct sk_buff *skb;
                struct hfa384x_inf_frame *inf;

                while ((skb = skb_dequeue(&hw->authq))) {
                        inf = (struct hfa384x_inf_frame *)skb->data;
                        prism2sta_inf_authreq_defer(wlandev, inf);
                }
        }

        /* Now let's handle the linkstatus stuff */
        if (hw->link_status == hw->link_status_new)
                return;

        hw->link_status = hw->link_status_new;

        switch (hw->link_status) {
        case HFA384x_LINK_NOTCONNECTED:
                /* I'm currently assuming that this is the initial link
                 * state.  It should only be possible immediately
                 * following an Enable command.
                 * Response:
                 * Block Transmits, Ignore receives of data frames
                 */
                netif_carrier_off(wlandev->netdev);

                netdev_info(wlandev->netdev, "linkstatus=NOTCONNECTED (unhandled)\n");
                break;

        case HFA384x_LINK_CONNECTED:
                /* This one indicates a successful scan/join/auth/assoc.
                 * When we have the full MLME complement, this event will
                 * signify successful completion of both mlme_authenticate
                 * and mlme_associate.  State management will get a little
                 * ugly here.
                 * Response:
                 * Indicate authentication and/or association
                 * Enable Transmits, Receives and pass up data frames
                 */

                netif_carrier_on(wlandev->netdev);

                /* If we are joining a specific AP, set our
                 * state and reset retries
                 */
                if (hw->join_ap == 1)
                        hw->join_ap = 2;
                hw->join_retries = 60;

                /* Don't call this in monitor mode */
                if (wlandev->netdev->type == ARPHRD_ETHER) {
                        u16 portstatus;

                        netdev_info(wlandev->netdev, "linkstatus=CONNECTED\n");

                        /* For non-usb devices, we can use the sync versions */
                        /* Collect the BSSID, and set state to allow tx */

                        result = hfa384x_drvr_getconfig(hw,
                                                        HFA384x_RID_CURRENTBSSID,
                                                        wlandev->bssid,
                                                        WLAN_BSSID_LEN);
                        if (result) {
                                pr_debug
                                    ("getconfig(0x%02x) failed, result = %d\n",
                                     HFA384x_RID_CURRENTBSSID, result);
                                return;
                        }

                        result = hfa384x_drvr_getconfig(hw,
                                                        HFA384x_RID_CURRENTSSID,
                                                        &ssid, sizeof(ssid));
                        if (result) {
                                pr_debug
                                    ("getconfig(0x%02x) failed, result = %d\n",
                                     HFA384x_RID_CURRENTSSID, result);
                                return;
                        }
                        prism2mgmt_bytestr2pstr((struct hfa384x_bytestr *)&ssid,
                                                (struct p80211pstrd *)&wlandev->ssid);

                        /* Collect the port status */
                        result = hfa384x_drvr_getconfig16(hw,
                                                          HFA384x_RID_PORTSTATUS,
                                                          &portstatus);
                        if (result) {
                                pr_debug
                                    ("getconfig(0x%02x) failed, result = %d\n",
                                     HFA384x_RID_PORTSTATUS, result);
                                return;
                        }
                        wlandev->macmode =
                            (portstatus == HFA384x_PSTATUS_CONN_IBSS) ?
                            WLAN_MACMODE_IBSS_STA : WLAN_MACMODE_ESS_STA;

                        /* signal back up to cfg80211 layer */
                        prism2_connect_result(wlandev, P80211ENUM_truth_false);

                        /* Get the ball rolling on the comms quality stuff */
                        prism2sta_commsqual_defer(&hw->commsqual_bh);
                }
                break;

        case HFA384x_LINK_DISCONNECTED:
                /* This one indicates that our association is gone.  We've
                 * lost connection with the AP and/or been disassociated.
                 * This indicates that the MAC has completely cleared it's
                 * associated state.  We * should send a deauth indication
                 * (implying disassoc) up * to the MLME.
                 * Response:
                 * Indicate Deauthentication
                 * Block Transmits, Ignore receives of data frames
                 */
                if (wlandev->netdev->type == ARPHRD_ETHER)
                        netdev_info(wlandev->netdev,
                                    "linkstatus=DISCONNECTED (unhandled)\n");
                wlandev->macmode = WLAN_MACMODE_NONE;

                netif_carrier_off(wlandev->netdev);

                /* signal back up to cfg80211 layer */
                prism2_disconnected(wlandev);

                break;

        case HFA384x_LINK_AP_CHANGE:
                /* This one indicates that the MAC has decided to and
                 * successfully completed a change to another AP.  We
                 * should probably implement a reassociation indication
                 * in response to this one.  I'm thinking that the
                 * p80211 layer needs to be notified in case of
                 * buffering/queueing issues.  User mode also needs to be
                 * notified so that any BSS dependent elements can be
                 * updated.
                 * associated state.  We * should send a deauth indication
                 * (implying disassoc) up * to the MLME.
                 * Response:
                 * Indicate Reassociation
                 * Enable Transmits, Receives and pass up data frames
                 */
                netdev_info(wlandev->netdev, "linkstatus=AP_CHANGE\n");

                result = hfa384x_drvr_getconfig(hw,
                                                HFA384x_RID_CURRENTBSSID,
                                                wlandev->bssid, WLAN_BSSID_LEN);
                if (result) {
                        pr_debug("getconfig(0x%02x) failed, result = %d\n",
                                 HFA384x_RID_CURRENTBSSID, result);
                        return;
                }

                result = hfa384x_drvr_getconfig(hw,
                                                HFA384x_RID_CURRENTSSID,
                                                &ssid, sizeof(ssid));
                if (result) {
                        pr_debug("getconfig(0x%02x) failed, result = %d\n",
                                 HFA384x_RID_CURRENTSSID, result);
                        return;
                }
                prism2mgmt_bytestr2pstr((struct hfa384x_bytestr *)&ssid,
                                        (struct p80211pstrd *)&wlandev->ssid);

                hw->link_status = HFA384x_LINK_CONNECTED;
                netif_carrier_on(wlandev->netdev);

                /* signal back up to cfg80211 layer */
                prism2_roamed(wlandev);

                break;

        case HFA384x_LINK_AP_OUTOFRANGE:
                /* This one indicates that the MAC has decided that the
                 * AP is out of range, but hasn't found a better candidate
                 * so the MAC maintains its "associated" state in case
                 * we get back in range.  We should block transmits and
                 * receives in this state.  Do we need an indication here?
                 * Probably not since a polling user-mode element would
                 * get this status from from p2PortStatus(FD40). What about
                 * p80211?
                 * Response:
                 * Block Transmits, Ignore receives of data frames
                 */
                netdev_info(wlandev->netdev, "linkstatus=AP_OUTOFRANGE (unhandled)\n");

                netif_carrier_off(wlandev->netdev);

                break;

        case HFA384x_LINK_AP_INRANGE:
                /* This one indicates that the MAC has decided that the
                 * AP is back in range.  We continue working with our
                 * existing association.
                 * Response:
                 * Enable Transmits, Receives and pass up data frames
                 */
                netdev_info(wlandev->netdev, "linkstatus=AP_INRANGE\n");

                hw->link_status = HFA384x_LINK_CONNECTED;
                netif_carrier_on(wlandev->netdev);

                break;

        case HFA384x_LINK_ASSOCFAIL:
                /* This one is actually a peer to CONNECTED.  We've
                 * requested a join for a given SSID and optionally BSSID.
                 * We can use this one to indicate authentication and
                 * association failures.  The trick is going to be
                 * 1) identifying the failure, and 2) state management.
                 * Response:
                 * Disable Transmits, Ignore receives of data frames
                 */
                if (hw->join_ap && --hw->join_retries > 0) {
                        struct hfa384x_join_request_data joinreq;

                        joinreq = hw->joinreq;
                        /* Send the join request */
                        hfa384x_drvr_setconfig(hw,
                                               HFA384x_RID_JOINREQUEST,
                                               &joinreq,
                                               HFA384x_RID_JOINREQUEST_LEN);
                        netdev_info(wlandev->netdev,
                                    "linkstatus=ASSOCFAIL (re-submitting join)\n");
                } else {
                        netdev_info(wlandev->netdev, "linkstatus=ASSOCFAIL (unhandled)\n");
                }

                netif_carrier_off(wlandev->netdev);

                /* signal back up to cfg80211 layer */
                prism2_connect_result(wlandev, P80211ENUM_truth_true);

                break;

        default:
                /* This is bad, IO port problems? */
                netdev_warn(wlandev->netdev,
                            "unknown linkstatus=0x%02x\n", hw->link_status);
                return;
        }

        wlandev->linkstatus = (hw->link_status == HFA384x_LINK_CONNECTED);
}

/*
 * prism2sta_inf_linkstatus
 *
 * Handles the receipt of a Link Status info frame.
 *
 * Arguments:
 *      wlandev         wlan device structure
 *      inf             ptr to info frame (contents in hfa384x order)
 *
 * Returns:
 *      nothing
 *
 * Side effects:
 *
 * Call context:
 *      interrupt
 */
static void prism2sta_inf_linkstatus(struct wlandevice *wlandev,
                                     struct hfa384x_inf_frame *inf)
{
        struct hfa384x *hw = wlandev->priv;

        hw->link_status_new = le16_to_cpu(inf->info.linkstatus.linkstatus);

        schedule_work(&hw->link_bh);
}

/*
 * prism2sta_inf_assocstatus
 *
 * Handles the receipt of an Association Status info frame. Should
 * be present in APs only.
 *
 * Arguments:
 *      wlandev         wlan device structure
 *      inf             ptr to info frame (contents in hfa384x order)
 *
 * Returns:
 *      nothing
 *
 * Side effects:
 *
 * Call context:
 *      interrupt
 */
static void prism2sta_inf_assocstatus(struct wlandevice *wlandev,
                                      struct hfa384x_inf_frame *inf)
{
        struct hfa384x *hw = wlandev->priv;
        struct hfa384x_assoc_status rec;
        int i;

        memcpy(&rec, &inf->info.assocstatus, sizeof(rec));
        le16_to_cpus(&rec.assocstatus);
        le16_to_cpus(&rec.reason);

        /*
         * Find the address in the list of authenticated stations.
         * If it wasn't found, then this address has not been previously
         * authenticated and something weird has happened if this is
         * anything other than an "authentication failed" message.
         * If the address was found, then set the "associated" flag for
         * that station, based on whether the station is associating or
         * losing its association.  Something weird has also happened
         * if we find the address in the list of authenticated stations
         * but we are getting an "authentication failed" message.
         */

        for (i = 0; i < hw->authlist.cnt; i++)
                if (ether_addr_equal(rec.sta_addr, hw->authlist.addr[i]))
                        break;

        if (i >= hw->authlist.cnt) {
                if (rec.assocstatus != HFA384x_ASSOCSTATUS_AUTHFAIL)
                        netdev_warn(wlandev->netdev,
                                    "assocstatus info frame received for non-authenticated station.\n");
        } else {
                hw->authlist.assoc[i] =
                    (rec.assocstatus == HFA384x_ASSOCSTATUS_STAASSOC ||
                     rec.assocstatus == HFA384x_ASSOCSTATUS_REASSOC);

                if (rec.assocstatus == HFA384x_ASSOCSTATUS_AUTHFAIL)
                        netdev_warn(wlandev->netdev,
                                    "authfail assocstatus info frame received for authenticated station.\n");
        }
}

/*
 * prism2sta_inf_authreq
 *
 * Handles the receipt of an Authentication Request info frame. Should
 * be present in APs only.
 *
 * Arguments:
 *      wlandev         wlan device structure
 *      inf             ptr to info frame (contents in hfa384x order)
 *
 * Returns:
 *      nothing
 *
 * Side effects:
 *
 * Call context:
 *      interrupt
 *
 */
static void prism2sta_inf_authreq(struct wlandevice *wlandev,
                                  struct hfa384x_inf_frame *inf)
{
        struct hfa384x *hw = wlandev->priv;
        struct sk_buff *skb;

        skb = dev_alloc_skb(sizeof(*inf));
        if (skb) {
                skb_put(skb, sizeof(*inf));
                memcpy(skb->data, inf, sizeof(*inf));
                skb_queue_tail(&hw->authq, skb);
                schedule_work(&hw->link_bh);
        }
}

static void prism2sta_inf_authreq_defer(struct wlandevice *wlandev,
                                        struct hfa384x_inf_frame *inf)
{
        struct hfa384x *hw = wlandev->priv;
        struct hfa384x_authenticate_station_data rec;

        int i, added, result, cnt;
        u8 *addr;

        /*
         * Build the AuthenticateStation record.  Initialize it for denying
         * authentication.
         */

        ether_addr_copy(rec.address, inf->info.authreq.sta_addr);
        rec.status = cpu_to_le16(P80211ENUM_status_unspec_failure);

        /*
         * Authenticate based on the access mode.
         */

        switch (hw->accessmode) {
        case WLAN_ACCESS_NONE:

                /*
                 * Deny all new authentications.  However, if a station
                 * is ALREADY authenticated, then accept it.
                 */

                for (i = 0; i < hw->authlist.cnt; i++)
                        if (ether_addr_equal(rec.address,
                                             hw->authlist.addr[i])) {
                                rec.status = cpu_to_le16(P80211ENUM_status_successful);
                                break;
                        }

                break;

        case WLAN_ACCESS_ALL:

                /*
                 * Allow all authentications.
                 */

                rec.status = cpu_to_le16(P80211ENUM_status_successful);
                break;

        case WLAN_ACCESS_ALLOW:

                /*
                 * Only allow the authentication if the MAC address
                 * is in the list of allowed addresses.
                 *
                 * Since this is the interrupt handler, we may be here
                 * while the access list is in the middle of being
                 * updated.  Choose the list which is currently okay.
                 * See "prism2mib_priv_accessallow()" for details.
                 */

                if (hw->allow.modify == 0) {
                        cnt = hw->allow.cnt;
                        addr = hw->allow.addr[0];
                } else {
                        cnt = hw->allow.cnt1;
                        addr = hw->allow.addr1[0];
                }

                for (i = 0; i < cnt; i++, addr += ETH_ALEN)
                        if (ether_addr_equal(rec.address, addr)) {
                                rec.status = cpu_to_le16(P80211ENUM_status_successful);
                                break;
                        }

                break;

        case WLAN_ACCESS_DENY:

                /*
                 * Allow the authentication UNLESS the MAC address is
                 * in the list of denied addresses.
                 *
                 * Since this is the interrupt handler, we may be here
                 * while the access list is in the middle of being
                 * updated.  Choose the list which is currently okay.
                 * See "prism2mib_priv_accessdeny()" for details.
                 */

                if (hw->deny.modify == 0) {
                        cnt = hw->deny.cnt;
                        addr = hw->deny.addr[0];
                } else {
                        cnt = hw->deny.cnt1;
                        addr = hw->deny.addr1[0];
                }

                rec.status = cpu_to_le16(P80211ENUM_status_successful);

                for (i = 0; i < cnt; i++, addr += ETH_ALEN)
                        if (ether_addr_equal(rec.address, addr)) {
                                rec.status = cpu_to_le16(P80211ENUM_status_unspec_failure);
                                break;
                        }

                break;
        }

        /*
         * If the authentication is okay, then add the MAC address to the
         * list of authenticated stations.  Don't add the address if it
         * is already in the list. (802.11b does not seem to disallow
         * a station from issuing an authentication request when the
         * station is already authenticated. Does this sort of thing
         * ever happen?  We might as well do the check just in case.)
         */

        added = 0;

        if (rec.status == cpu_to_le16(P80211ENUM_status_successful)) {
                for (i = 0; i < hw->authlist.cnt; i++)
                        if (ether_addr_equal(rec.address,
                                             hw->authlist.addr[i]))
                                break;

                if (i >= hw->authlist.cnt) {
                        if (hw->authlist.cnt >= WLAN_AUTH_MAX) {
                                rec.status = cpu_to_le16(P80211ENUM_status_ap_full);
                        } else {
                                ether_addr_copy(hw->authlist.addr[hw->authlist.cnt],
                                                rec.address);
                                hw->authlist.cnt++;
                                added = 1;
                        }
                }
        }

        /*
         * Send back the results of the authentication.  If this doesn't work,
         * then make sure to remove the address from the authenticated list if
         * it was added.
         */

        rec.algorithm = inf->info.authreq.algorithm;

        result = hfa384x_drvr_setconfig(hw, HFA384x_RID_AUTHENTICATESTA,
                                        &rec, sizeof(rec));
        if (result) {
                if (added)
                        hw->authlist.cnt--;
                netdev_err(wlandev->netdev,
                           "setconfig(authenticatestation) failed, result=%d\n",
                           result);
        }
}

/*
 * prism2sta_inf_psusercnt
 *
 * Handles the receipt of a PowerSaveUserCount info frame. Should
 * be present in APs only.
 *
 * Arguments:
 *      wlandev         wlan device structure
 *      inf             ptr to info frame (contents in hfa384x order)
 *
 * Returns:
 *      nothing
 *
 * Side effects:
 *
 * Call context:
 *      interrupt
 */
static void prism2sta_inf_psusercnt(struct wlandevice *wlandev,
                                    struct hfa384x_inf_frame *inf)
{
        struct hfa384x *hw = wlandev->priv;

        hw->psusercount = le16_to_cpu(inf->info.psusercnt.usercnt);
}

/*
 * prism2sta_ev_info
 *
 * Handles the Info event.
 *
 * Arguments:
 *      wlandev         wlan device structure
 *      inf             ptr to a generic info frame
 *
 * Returns:
 *      nothing
 *
 * Side effects:
 *
 * Call context:
 *      interrupt
 */
void prism2sta_ev_info(struct wlandevice *wlandev,
                       struct hfa384x_inf_frame *inf)
{
        le16_to_cpus(&inf->infotype);
        /* Dispatch */
        switch (inf->infotype) {
        case HFA384x_IT_HANDOVERADDR:
                prism2sta_inf_handover(wlandev, inf);
                break;
        case HFA384x_IT_COMMTALLIES:
                prism2sta_inf_tallies(wlandev, inf);
                break;
        case HFA384x_IT_HOSTSCANRESULTS:
                prism2sta_inf_hostscanresults(wlandev, inf);
                break;
        case HFA384x_IT_SCANRESULTS:
                prism2sta_inf_scanresults(wlandev, inf);
                break;
        case HFA384x_IT_CHINFORESULTS:
                prism2sta_inf_chinforesults(wlandev, inf);
                break;
        case HFA384x_IT_LINKSTATUS:
                prism2sta_inf_linkstatus(wlandev, inf);
                break;
        case HFA384x_IT_ASSOCSTATUS:
                prism2sta_inf_assocstatus(wlandev, inf);
                break;
        case HFA384x_IT_AUTHREQ:
                prism2sta_inf_authreq(wlandev, inf);
                break;
        case HFA384x_IT_PSUSERCNT:
                prism2sta_inf_psusercnt(wlandev, inf);
                break;
        case HFA384x_IT_KEYIDCHANGED:
                netdev_warn(wlandev->netdev, "Unhandled IT_KEYIDCHANGED\n");
                break;
        case HFA384x_IT_ASSOCREQ:
                netdev_warn(wlandev->netdev, "Unhandled IT_ASSOCREQ\n");
                break;
        case HFA384x_IT_MICFAILURE:
                netdev_warn(wlandev->netdev, "Unhandled IT_MICFAILURE\n");
                break;
        default:
                netdev_warn(wlandev->netdev,
                            "Unknown info type=0x%02x\n", inf->infotype);
                break;
        }
}

/*
 * prism2sta_ev_txexc
 *
 * Handles the TxExc event.  A Transmit Exception event indicates
 * that the MAC's TX process was unsuccessful - so the packet did
 * not get transmitted.
 *
 * Arguments:
 *      wlandev         wlan device structure
 *      status          tx frame status word
 *
 * Returns:
 *      nothing
 *
 * Side effects:
 *
 * Call context:
 *      interrupt
 */
void prism2sta_ev_txexc(struct wlandevice *wlandev, u16 status)
{
        pr_debug("TxExc status=0x%x.\n", status);
}

/*
 * prism2sta_ev_tx
 *
 * Handles the Tx event.
 *
 * Arguments:
 *      wlandev         wlan device structure
 *      status          tx frame status word
 * Returns:
 *      nothing
 *
 * Side effects:
 *
 * Call context:
 *      interrupt
 */
void prism2sta_ev_tx(struct wlandevice *wlandev, u16 status)
{
        pr_debug("Tx Complete, status=0x%04x\n", status);
        /* update linux network stats */
        wlandev->netdev->stats.tx_packets++;
}

/*
 * prism2sta_ev_alloc
 *
 * Handles the Alloc event.
 *
 * Arguments:
 *      wlandev         wlan device structure
 *
 * Returns:
 *      nothing
 *
 * Side effects:
 *
 * Call context:
 *      interrupt
 */
void prism2sta_ev_alloc(struct wlandevice *wlandev)
{
        netif_wake_queue(wlandev->netdev);
}

/*
 * create_wlan
 *
 * Called at module init time.  This creates the struct wlandevice structure
 * and initializes it with relevant bits.
 *
 * Arguments:
 *      none
 *
 * Returns:
 *      the created struct wlandevice structure.
 *
 * Side effects:
 *      also allocates the priv/hw structures.
 *
 * Call context:
 *      process thread
 *
 */
static struct wlandevice *create_wlan(void)
{
        struct wlandevice *wlandev = NULL;
        struct hfa384x *hw = NULL;

        /* Alloc our structures */
        wlandev = kzalloc(sizeof(*wlandev), GFP_KERNEL);
        hw = kzalloc(sizeof(*hw), GFP_KERNEL);

        if (!wlandev || !hw) {
                kfree(wlandev);
                kfree(hw);
                return NULL;
        }

        /* Initialize the network device object. */
        wlandev->nsdname = dev_info;
        wlandev->msdstate = WLAN_MSD_HWPRESENT_PENDING;
        wlandev->priv = hw;
        wlandev->open = prism2sta_open;
        wlandev->close = prism2sta_close;
        wlandev->reset = prism2sta_reset;
        wlandev->txframe = prism2sta_txframe;
        wlandev->mlmerequest = prism2sta_mlmerequest;
        wlandev->set_multicast_list = prism2sta_setmulticast;
        wlandev->tx_timeout = hfa384x_tx_timeout;

        wlandev->nsdcaps = P80211_NSDCAP_HWFRAGMENT | P80211_NSDCAP_AUTOJOIN;

        /* Initialize the device private data structure. */
        hw->dot11_desired_bss_type = 1;

        return wlandev;
}

void prism2sta_commsqual_defer(struct work_struct *data)
{
        struct hfa384x *hw = container_of(data, struct hfa384x, commsqual_bh);
        struct wlandevice *wlandev = hw->wlandev;
        struct hfa384x_bytestr32 ssid;
        struct p80211msg_dot11req_mibget msg;
        struct p80211item_uint32 *mibitem = (struct p80211item_uint32 *)
                                                &msg.mibattribute.data;
        int result = 0;

        if (hw->wlandev->hwremoved)
                return;

        /* we don't care if we're in AP mode */
        if ((wlandev->macmode == WLAN_MACMODE_NONE) ||
            (wlandev->macmode == WLAN_MACMODE_ESS_AP)) {
                return;
        }

        /* It only makes sense to poll these in non-IBSS */
        if (wlandev->macmode != WLAN_MACMODE_IBSS_STA) {
                result = hfa384x_drvr_getconfig(hw, HFA384x_RID_DBMCOMMSQUALITY,
                                                &hw->qual, HFA384x_RID_DBMCOMMSQUALITY_LEN);

                if (result) {
                        netdev_err(wlandev->netdev, "error fetching commsqual\n");
                        return;
                }

                pr_debug("commsqual %d %d %d\n",
                         le16_to_cpu(hw->qual.cq_curr_bss),
                         le16_to_cpu(hw->qual.asl_curr_bss),
                         le16_to_cpu(hw->qual.anl_curr_fc));
        }

        /* Get the signal rate */
        msg.msgcode = DIDMSG_DOT11REQ_MIBGET;
        mibitem->did = DIDMIB_P2_MAC_CURRENTTXRATE;
        result = p80211req_dorequest(wlandev, (u8 *)&msg);

        if (result) {
                pr_debug("get signal rate failed, result = %d\n",
                         result);
                return;
        }

        switch (mibitem->data) {
        case HFA384x_RATEBIT_1:
                hw->txrate = 10;
                break;
        case HFA384x_RATEBIT_2:
                hw->txrate = 20;
                break;
        case HFA384x_RATEBIT_5dot5:
                hw->txrate = 55;
                break;
        case HFA384x_RATEBIT_11:
                hw->txrate = 110;
                break;
        default:
                pr_debug("Bad ratebit (%d)\n", mibitem->data);
        }

        /* Lastly, we need to make sure the BSSID didn't change on us */
        result = hfa384x_drvr_getconfig(hw,
                                        HFA384x_RID_CURRENTBSSID,
                                        wlandev->bssid, WLAN_BSSID_LEN);
        if (result) {
                pr_debug("getconfig(0x%02x) failed, result = %d\n",
                         HFA384x_RID_CURRENTBSSID, result);
                return;
        }

        result = hfa384x_drvr_getconfig(hw,
                                        HFA384x_RID_CURRENTSSID,
                                        &ssid, sizeof(ssid));
        if (result) {
                pr_debug("getconfig(0x%02x) failed, result = %d\n",
                         HFA384x_RID_CURRENTSSID, result);
                return;
        }
        prism2mgmt_bytestr2pstr((struct hfa384x_bytestr *)&ssid,
                                (struct p80211pstrd *)&wlandev->ssid);

        /* Reschedule timer */
        mod_timer(&hw->commsqual_timer, jiffies + HZ);
}

void prism2sta_commsqual_timer(struct timer_list *t)
{
        struct hfa384x *hw = from_timer(hw, t, commsqual_timer);

        schedule_work(&hw->commsqual_bh);
}