iwlwifi: fix station mimo power save values

[deliverable/linux.git] / drivers / net / wireless / iwlwifi / iwl-agn.c

/******************************************************************************
 *
 * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved.
 *
 * Portions of this file are derived from the ipw3945 project, as well
 * as portions of the ieee80211 subsystem header files.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
 *
 * The full GNU General Public License is included in this distribution in the
 * file called LICENSE.
 *
 * Contact Information:
 * James P. Ketrenos <ipw2100-admin@linux.intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 *****************************************************************************/

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/delay.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/wireless.h>
#include <linux/firmware.h>
#include <linux/etherdevice.h>
#include <linux/if_arp.h>

#include <net/mac80211.h>

#include <asm/div64.h>

#include "iwl-eeprom.h"
#include "iwl-dev.h"
#include "iwl-core.h"
#include "iwl-io.h"
#include "iwl-helpers.h"
#include "iwl-sta.h"
#include "iwl-calib.h"


/******************************************************************************
 *
 * module boiler plate
 *
 ******************************************************************************/

/*
 * module name, copyright, version, etc.
 * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
 */

#define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"

#ifdef CONFIG_IWLWIFI_DEBUG
#define VD "d"
#else
#define VD
#endif

#ifdef CONFIG_IWLAGN_SPECTRUM_MEASUREMENT
#define VS "s"
#else
#define VS
#endif

#define DRV_VERSION     IWLWIFI_VERSION VD VS


MODULE_DESCRIPTION(DRV_DESCRIPTION);
MODULE_VERSION(DRV_VERSION);
MODULE_AUTHOR(DRV_COPYRIGHT);
MODULE_LICENSE("GPL");
MODULE_ALIAS("iwl4965");

/*************** STATION TABLE MANAGEMENT ****
 * mac80211 should be examined to determine if sta_info is duplicating
 * the functionality provided here
 */

/**************************************************************/



static void iwl4965_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
{
        struct iwl_rxon_cmd *rxon = &priv->staging_rxon;

        if (hw_decrypt)
                rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
        else
                rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;

}

/**
 * iwl4965_check_rxon_cmd - validate RXON structure is valid
 *
 * NOTE:  This is really only useful during development and can eventually
 * be #ifdef'd out once the driver is stable and folks aren't actively
 * making changes
 */
static int iwl4965_check_rxon_cmd(struct iwl_rxon_cmd *rxon)
{
        int error = 0;
        int counter = 1;

        if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
                error |= le32_to_cpu(rxon->flags &
                                (RXON_FLG_TGJ_NARROW_BAND_MSK |
                                 RXON_FLG_RADAR_DETECT_MSK));
                if (error)
                        IWL_WARNING("check 24G fields %d | %d\n",
                                    counter++, error);
        } else {
                error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
                                0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
                if (error)
                        IWL_WARNING("check 52 fields %d | %d\n",
                                    counter++, error);
                error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
                if (error)
                        IWL_WARNING("check 52 CCK %d | %d\n",
                                    counter++, error);
        }
        error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
        if (error)
                IWL_WARNING("check mac addr %d | %d\n", counter++, error);

        /* make sure basic rates 6Mbps and 1Mbps are supported */
        error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
                  ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
        if (error)
                IWL_WARNING("check basic rate %d | %d\n", counter++, error);

        error |= (le16_to_cpu(rxon->assoc_id) > 2007);
        if (error)
                IWL_WARNING("check assoc id %d | %d\n", counter++, error);

        error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
                        == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
        if (error)
                IWL_WARNING("check CCK and short slot %d | %d\n",
                            counter++, error);

        error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
                        == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
        if (error)
                IWL_WARNING("check CCK & auto detect %d | %d\n",
                            counter++, error);

        error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
                        RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
        if (error)
                IWL_WARNING("check TGG and auto detect %d | %d\n",
                            counter++, error);

        if (error)
                IWL_WARNING("Tuning to channel %d\n",
                            le16_to_cpu(rxon->channel));

        if (error) {
                IWL_ERROR("Not a valid iwl4965_rxon_assoc_cmd field values\n");
                return -1;
        }
        return 0;
}

/**
 * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 * @priv: staging_rxon is compared to active_rxon
 *
 * If the RXON structure is changing enough to require a new tune,
 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 */
static int iwl_full_rxon_required(struct iwl_priv *priv)
{

        /* These items are only settable from the full RXON command */
        if (!(iwl_is_associated(priv)) ||
            compare_ether_addr(priv->staging_rxon.bssid_addr,
                               priv->active_rxon.bssid_addr) ||
            compare_ether_addr(priv->staging_rxon.node_addr,
                               priv->active_rxon.node_addr) ||
            compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
                               priv->active_rxon.wlap_bssid_addr) ||
            (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
            (priv->staging_rxon.channel != priv->active_rxon.channel) ||
            (priv->staging_rxon.air_propagation !=
             priv->active_rxon.air_propagation) ||
            (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
             priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
            (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
             priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
            (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
                return 1;

        /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
         * be updated with the RXON_ASSOC command -- however only some
         * flag transitions are allowed using RXON_ASSOC */

        /* Check if we are not switching bands */
        if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
            (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
                return 1;

        /* Check if we are switching association toggle */
        if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
                (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
                return 1;

        return 0;
}

/**
 * iwl4965_commit_rxon - commit staging_rxon to hardware
 *
 * The RXON command in staging_rxon is committed to the hardware and
 * the active_rxon structure is updated with the new data.  This
 * function correctly transitions out of the RXON_ASSOC_MSK state if
 * a HW tune is required based on the RXON structure changes.
 */
static int iwl4965_commit_rxon(struct iwl_priv *priv)
{
        /* cast away the const for active_rxon in this function */
        struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
        DECLARE_MAC_BUF(mac);
        int ret;
        bool new_assoc =
                !!(priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK);

        if (!iwl_is_alive(priv))
                return -EBUSY;

        /* always get timestamp with Rx frame */
        priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
        /* allow CTS-to-self if possible. this is relevant only for
         * 5000, but will not damage 4965 */
        priv->staging_rxon.flags |= RXON_FLG_SELF_CTS_EN;

        ret = iwl4965_check_rxon_cmd(&priv->staging_rxon);
        if (ret) {
                IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
                return -EINVAL;
        }

        /* If we don't need to send a full RXON, we can use
         * iwl4965_rxon_assoc_cmd which is used to reconfigure filter
         * and other flags for the current radio configuration. */
        if (!iwl_full_rxon_required(priv)) {
                ret = iwl_send_rxon_assoc(priv);
                if (ret) {
                        IWL_ERROR("Error setting RXON_ASSOC (%d)\n", ret);
                        return ret;
                }

                memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
                return 0;
        }

        /* station table will be cleared */
        priv->assoc_station_added = 0;

        /* If we are currently associated and the new config requires
         * an RXON_ASSOC and the new config wants the associated mask enabled,
         * we must clear the associated from the active configuration
         * before we apply the new config */
        if (iwl_is_associated(priv) && new_assoc) {
                IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
                active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;

                ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
                                      sizeof(struct iwl_rxon_cmd),
                                      &priv->active_rxon);

                /* If the mask clearing failed then we set
                 * active_rxon back to what it was previously */
                if (ret) {
                        active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
                        IWL_ERROR("Error clearing ASSOC_MSK (%d)\n", ret);
                        return ret;
                }
        }

        IWL_DEBUG_INFO("Sending RXON\n"
                       "* with%s RXON_FILTER_ASSOC_MSK\n"
                       "* channel = %d\n"
                       "* bssid = %s\n",
                       (new_assoc ? "" : "out"),
                       le16_to_cpu(priv->staging_rxon.channel),
                       print_mac(mac, priv->staging_rxon.bssid_addr));

        iwl4965_set_rxon_hwcrypto(priv, !priv->hw_params.sw_crypto);

        /* Apply the new configuration
         * RXON unassoc clears the station table in uCode, send it before
         * we add the bcast station. If assoc bit is set, we will send RXON
         * after having added the bcast and bssid station.
         */
        if (!new_assoc) {
                ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
                              sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
                if (ret) {
                        IWL_ERROR("Error setting new RXON (%d)\n", ret);
                        return ret;
                }
                memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
        }

        iwl_clear_stations_table(priv);

        if (!priv->error_recovering)
                priv->start_calib = 0;

        /* Add the broadcast address so we can send broadcast frames */
        if (iwl_rxon_add_station(priv, iwl_bcast_addr, 0) ==
                                                IWL_INVALID_STATION) {
                IWL_ERROR("Error adding BROADCAST address for transmit.\n");
                return -EIO;
        }

        /* If we have set the ASSOC_MSK and we are in BSS mode then
         * add the IWL_AP_ID to the station rate table */
        if (new_assoc) {
                if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
                        ret = iwl_rxon_add_station(priv,
                                           priv->active_rxon.bssid_addr, 1);
                        if (ret == IWL_INVALID_STATION) {
                                IWL_ERROR("Error adding AP address for TX.\n");
                                return -EIO;
                        }
                        priv->assoc_station_added = 1;
                        if (priv->default_wep_key &&
                            iwl_send_static_wepkey_cmd(priv, 0))
                                IWL_ERROR("Could not send WEP static key.\n");
                }

                /* Apply the new configuration
                 * RXON assoc doesn't clear the station table in uCode,
                 */
                ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
                              sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
                if (ret) {
                        IWL_ERROR("Error setting new RXON (%d)\n", ret);
                        return ret;
                }
                memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
        }

        iwl_init_sensitivity(priv);

        /* If we issue a new RXON command which required a tune then we must
         * send a new TXPOWER command or we won't be able to Tx any frames */
        ret = iwl_set_tx_power(priv, priv->tx_power_user_lmt, true);
        if (ret) {
                IWL_ERROR("Error sending TX power (%d)\n", ret);
                return ret;
        }

        return 0;
}

void iwl4965_update_chain_flags(struct iwl_priv *priv)
{

        iwl_set_rxon_chain(priv);
        iwl4965_commit_rxon(priv);
}

static int iwl4965_send_bt_config(struct iwl_priv *priv)
{
        struct iwl4965_bt_cmd bt_cmd = {
                .flags = 3,
                .lead_time = 0xAA,
                .max_kill = 1,
                .kill_ack_mask = 0,
                .kill_cts_mask = 0,
        };

        return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
                                sizeof(struct iwl4965_bt_cmd), &bt_cmd);
}

static void iwl_clear_free_frames(struct iwl_priv *priv)
{
        struct list_head *element;

        IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
                       priv->frames_count);

        while (!list_empty(&priv->free_frames)) {
                element = priv->free_frames.next;
                list_del(element);
                kfree(list_entry(element, struct iwl_frame, list));
                priv->frames_count--;
        }

        if (priv->frames_count) {
                IWL_WARNING("%d frames still in use.  Did we lose one?\n",
                            priv->frames_count);
                priv->frames_count = 0;
        }
}

static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
{
        struct iwl_frame *frame;
        struct list_head *element;
        if (list_empty(&priv->free_frames)) {
                frame = kzalloc(sizeof(*frame), GFP_KERNEL);
                if (!frame) {
                        IWL_ERROR("Could not allocate frame!\n");
                        return NULL;
                }

                priv->frames_count++;
                return frame;
        }

        element = priv->free_frames.next;
        list_del(element);
        return list_entry(element, struct iwl_frame, list);
}

static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
{
        memset(frame, 0, sizeof(*frame));
        list_add(&frame->list, &priv->free_frames);
}

static unsigned int iwl_fill_beacon_frame(struct iwl_priv *priv,
                                          struct ieee80211_hdr *hdr,
                                          const u8 *dest, int left)
{
        if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
            ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
             (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
                return 0;

        if (priv->ibss_beacon->len > left)
                return 0;

        memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);

        return priv->ibss_beacon->len;
}

static u8 iwl4965_rate_get_lowest_plcp(struct iwl_priv *priv)
{
        int i;
        int rate_mask;

        /* Set rate mask*/
        if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
                rate_mask = priv->active_rate_basic & 0xF;
        else
                rate_mask = priv->active_rate_basic & 0xFF0;

        /* Find lowest valid rate */
        for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
                                        i = iwl_rates[i].next_ieee) {
                if (rate_mask & (1 << i))
                        return iwl_rates[i].plcp;
        }

        /* No valid rate was found. Assign the lowest one */
        if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
                return IWL_RATE_1M_PLCP;
        else
                return IWL_RATE_6M_PLCP;
}

unsigned int iwl4965_hw_get_beacon_cmd(struct iwl_priv *priv,
                                       struct iwl_frame *frame, u8 rate)
{
        struct iwl_tx_beacon_cmd *tx_beacon_cmd;
        unsigned int frame_size;

        tx_beacon_cmd = &frame->u.beacon;
        memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));

        tx_beacon_cmd->tx.sta_id = priv->hw_params.bcast_sta_id;
        tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;

        frame_size = iwl_fill_beacon_frame(priv, tx_beacon_cmd->frame,
                                iwl_bcast_addr,
                                sizeof(frame->u) - sizeof(*tx_beacon_cmd));

        BUG_ON(frame_size > MAX_MPDU_SIZE);
        tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);

        if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
                tx_beacon_cmd->tx.rate_n_flags =
                        iwl_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
        else
                tx_beacon_cmd->tx.rate_n_flags =
                        iwl_hw_set_rate_n_flags(rate, 0);

        tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
                                     TX_CMD_FLG_TSF_MSK |
                                     TX_CMD_FLG_STA_RATE_MSK;

        return sizeof(*tx_beacon_cmd) + frame_size;
}
static int iwl4965_send_beacon_cmd(struct iwl_priv *priv)
{
        struct iwl_frame *frame;
        unsigned int frame_size;
        int rc;
        u8 rate;

        frame = iwl_get_free_frame(priv);

        if (!frame) {
                IWL_ERROR("Could not obtain free frame buffer for beacon "
                          "command.\n");
                return -ENOMEM;
        }

        rate = iwl4965_rate_get_lowest_plcp(priv);

        frame_size = iwl4965_hw_get_beacon_cmd(priv, frame, rate);

        rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
                              &frame->u.cmd[0]);

        iwl_free_frame(priv, frame);

        return rc;
}

/******************************************************************************
 *
 * Misc. internal state and helper functions
 *
 ******************************************************************************/

static void iwl4965_ht_conf(struct iwl_priv *priv,
                            struct ieee80211_bss_conf *bss_conf)
{
        struct ieee80211_ht_info *ht_conf = bss_conf->ht_conf;
        struct ieee80211_ht_bss_info *ht_bss_conf = bss_conf->ht_bss_conf;
        struct iwl_ht_info *iwl_conf = &priv->current_ht_config;

        IWL_DEBUG_MAC80211("enter: \n");

        iwl_conf->is_ht = bss_conf->assoc_ht;

        if (!iwl_conf->is_ht)
                return;

        priv->ps_mode = (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);

        if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
                iwl_conf->sgf |= HT_SHORT_GI_20MHZ;
        if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
                iwl_conf->sgf |= HT_SHORT_GI_40MHZ;

        iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
        iwl_conf->max_amsdu_size =
                !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);

        iwl_conf->supported_chan_width =
                !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH);
        iwl_conf->extension_chan_offset =
                ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_SEC_OFFSET;
        /* If no above or below channel supplied disable FAT channel */
        if (iwl_conf->extension_chan_offset != IEEE80211_HT_IE_CHA_SEC_ABOVE &&
            iwl_conf->extension_chan_offset != IEEE80211_HT_IE_CHA_SEC_BELOW) {
                iwl_conf->extension_chan_offset = IEEE80211_HT_IE_CHA_SEC_NONE;
                iwl_conf->supported_chan_width = 0;
        }

        memcpy(iwl_conf->supp_mcs_set, ht_conf->supp_mcs_set, 16);

        iwl_conf->control_channel = ht_bss_conf->primary_channel;
        iwl_conf->tx_chan_width =
                !!(ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_WIDTH);
        iwl_conf->ht_protection =
                ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_HT_PROTECTION;
        iwl_conf->non_GF_STA_present =
                !!(ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_NON_GF_STA_PRSNT);

        IWL_DEBUG_MAC80211("control channel %d\n", iwl_conf->control_channel);
        IWL_DEBUG_MAC80211("leave\n");
}

/*
 * QoS  support
*/
static void iwl_activate_qos(struct iwl_priv *priv, u8 force)
{
        if (test_bit(STATUS_EXIT_PENDING, &priv->status))
                return;

        if (!priv->qos_data.qos_enable)
                return;

        priv->qos_data.def_qos_parm.qos_flags = 0;

        if (priv->qos_data.qos_cap.q_AP.queue_request &&
            !priv->qos_data.qos_cap.q_AP.txop_request)
                priv->qos_data.def_qos_parm.qos_flags |=
                        QOS_PARAM_FLG_TXOP_TYPE_MSK;
        if (priv->qos_data.qos_active)
                priv->qos_data.def_qos_parm.qos_flags |=
                        QOS_PARAM_FLG_UPDATE_EDCA_MSK;

        if (priv->current_ht_config.is_ht)
                priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;

        if (force || iwl_is_associated(priv)) {
                IWL_DEBUG_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
                                priv->qos_data.qos_active,
                                priv->qos_data.def_qos_parm.qos_flags);

                iwl_send_cmd_pdu_async(priv, REPLY_QOS_PARAM,
                                       sizeof(struct iwl_qosparam_cmd),
                                       &priv->qos_data.def_qos_parm, NULL);
        }
}

#define MAX_UCODE_BEACON_INTERVAL       4096

static __le16 iwl4965_adjust_beacon_interval(u16 beacon_val)
{
        u16 new_val = 0;
        u16 beacon_factor = 0;

        beacon_factor =
            (beacon_val + MAX_UCODE_BEACON_INTERVAL)
                / MAX_UCODE_BEACON_INTERVAL;
        new_val = beacon_val / beacon_factor;

        return cpu_to_le16(new_val);
}

static void iwl4965_setup_rxon_timing(struct iwl_priv *priv)
{
        u64 interval_tm_unit;
        u64 tsf, result;
        unsigned long flags;
        struct ieee80211_conf *conf = NULL;
        u16 beacon_int = 0;

        conf = ieee80211_get_hw_conf(priv->hw);

        spin_lock_irqsave(&priv->lock, flags);
        priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp >> 32);
        priv->rxon_timing.timestamp.dw[0] =
                                cpu_to_le32(priv->timestamp & 0xFFFFFFFF);

        priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);

        tsf = priv->timestamp;

        beacon_int = priv->beacon_int;
        spin_unlock_irqrestore(&priv->lock, flags);

        if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
                if (beacon_int == 0) {
                        priv->rxon_timing.beacon_interval = cpu_to_le16(100);
                        priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
                } else {
                        priv->rxon_timing.beacon_interval =
                                cpu_to_le16(beacon_int);
                        priv->rxon_timing.beacon_interval =
                            iwl4965_adjust_beacon_interval(
                                le16_to_cpu(priv->rxon_timing.beacon_interval));
                }

                priv->rxon_timing.atim_window = 0;
        } else {
                priv->rxon_timing.beacon_interval =
                        iwl4965_adjust_beacon_interval(conf->beacon_int);
                /* TODO: we need to get atim_window from upper stack
                 * for now we set to 0 */
                priv->rxon_timing.atim_window = 0;
        }

        interval_tm_unit =
                (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
        result = do_div(tsf, interval_tm_unit);
        priv->rxon_timing.beacon_init_val =
            cpu_to_le32((u32) ((u64) interval_tm_unit - result));

        IWL_DEBUG_ASSOC
            ("beacon interval %d beacon timer %d beacon tim %d\n",
                le16_to_cpu(priv->rxon_timing.beacon_interval),
                le32_to_cpu(priv->rxon_timing.beacon_init_val),
                le16_to_cpu(priv->rxon_timing.atim_window));
}

static void iwl_set_flags_for_band(struct iwl_priv *priv,
                                   enum ieee80211_band band)
{
        if (band == IEEE80211_BAND_5GHZ) {
                priv->staging_rxon.flags &=
                    ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
                      | RXON_FLG_CCK_MSK);
                priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
        } else {
                /* Copied from iwl4965_post_associate() */
                if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
                        priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
                else
                        priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;

                if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
                        priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;

                priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
                priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
                priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
        }
}

/*
 * initialize rxon structure with default values from eeprom
 */
static void iwl4965_connection_init_rx_config(struct iwl_priv *priv)
{
        const struct iwl_channel_info *ch_info;

        memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));

        switch (priv->iw_mode) {
        case IEEE80211_IF_TYPE_AP:
                priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
                break;

        case IEEE80211_IF_TYPE_STA:
                priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
                priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
                break;

        case IEEE80211_IF_TYPE_IBSS:
                priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
                priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
                priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
                                                  RXON_FILTER_ACCEPT_GRP_MSK;
                break;

        case IEEE80211_IF_TYPE_MNTR:
                priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
                priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
                    RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
                break;
        default:
                IWL_ERROR("Unsupported interface type %d\n", priv->iw_mode);
                break;
        }

#if 0
        /* TODO:  Figure out when short_preamble would be set and cache from
         * that */
        if (!hw_to_local(priv->hw)->short_preamble)
                priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
        else
                priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
#endif

        ch_info = iwl_get_channel_info(priv, priv->band,
                                       le16_to_cpu(priv->active_rxon.channel));

        if (!ch_info)
                ch_info = &priv->channel_info[0];

        /*
         * in some case A channels are all non IBSS
         * in this case force B/G channel
         */
        if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
            !(is_channel_ibss(ch_info)))
                ch_info = &priv->channel_info[0];

        priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
        priv->band = ch_info->band;

        iwl_set_flags_for_band(priv, priv->band);

        priv->staging_rxon.ofdm_basic_rates =
            (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
        priv->staging_rxon.cck_basic_rates =
            (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;

        priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
                                        RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
        memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
        memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
        priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
        priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
        iwl_set_rxon_chain(priv);
}

static int iwl4965_set_mode(struct iwl_priv *priv, int mode)
{
        priv->iw_mode = mode;

        iwl4965_connection_init_rx_config(priv);
        memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);

        iwl_clear_stations_table(priv);

        /* dont commit rxon if rf-kill is on*/
        if (!iwl_is_ready_rf(priv))
                return -EAGAIN;

        cancel_delayed_work(&priv->scan_check);
        if (iwl_scan_cancel_timeout(priv, 100)) {
                IWL_WARNING("Aborted scan still in progress after 100ms\n");
                IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
                return -EAGAIN;
        }

        iwl4965_commit_rxon(priv);

        return 0;
}

static void iwl4965_set_rate(struct iwl_priv *priv)
{
        const struct ieee80211_supported_band *hw = NULL;
        struct ieee80211_rate *rate;
        int i;

        hw = iwl_get_hw_mode(priv, priv->band);
        if (!hw) {
                IWL_ERROR("Failed to set rate: unable to get hw mode\n");
                return;
        }

        priv->active_rate = 0;
        priv->active_rate_basic = 0;

        for (i = 0; i < hw->n_bitrates; i++) {
                rate = &(hw->bitrates[i]);
                if (rate->hw_value < IWL_RATE_COUNT)
                        priv->active_rate |= (1 << rate->hw_value);
        }

        IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
                       priv->active_rate, priv->active_rate_basic);

        /*
         * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
         * otherwise set it to the default of all CCK rates and 6, 12, 24 for
         * OFDM
         */
        if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
                priv->staging_rxon.cck_basic_rates =
                    ((priv->active_rate_basic &
                      IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
        else
                priv->staging_rxon.cck_basic_rates =
                    (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;

        if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
                priv->staging_rxon.ofdm_basic_rates =
                    ((priv->active_rate_basic &
                      (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
                      IWL_FIRST_OFDM_RATE) & 0xFF;
        else
                priv->staging_rxon.ofdm_basic_rates =
                   (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
}

#ifdef CONFIG_IWLAGN_SPECTRUM_MEASUREMENT

#include "iwl-spectrum.h"

#define BEACON_TIME_MASK_LOW    0x00FFFFFF
#define BEACON_TIME_MASK_HIGH   0xFF000000
#define TIME_UNIT               1024

/*
 * extended beacon time format
 * time in usec will be changed into a 32-bit value in 8:24 format
 * the high 1 byte is the beacon counts
 * the lower 3 bytes is the time in usec within one beacon interval
 */

static u32 iwl4965_usecs_to_beacons(u32 usec, u32 beacon_interval)
{
        u32 quot;
        u32 rem;
        u32 interval = beacon_interval * 1024;

        if (!interval || !usec)
                return 0;

        quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
        rem = (usec % interval) & BEACON_TIME_MASK_LOW;

        return (quot << 24) + rem;
}

/* base is usually what we get from ucode with each received frame,
 * the same as HW timer counter counting down
 */

static __le32 iwl4965_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
{
        u32 base_low = base & BEACON_TIME_MASK_LOW;
        u32 addon_low = addon & BEACON_TIME_MASK_LOW;
        u32 interval = beacon_interval * TIME_UNIT;
        u32 res = (base & BEACON_TIME_MASK_HIGH) +
            (addon & BEACON_TIME_MASK_HIGH);

        if (base_low > addon_low)
                res += base_low - addon_low;
        else if (base_low < addon_low) {
                res += interval + base_low - addon_low;
                res += (1 << 24);
        } else
                res += (1 << 24);

        return cpu_to_le32(res);
}

static int iwl4965_get_measurement(struct iwl_priv *priv,
                               struct ieee80211_measurement_params *params,
                               u8 type)
{
        struct iwl4965_spectrum_cmd spectrum;
        struct iwl_rx_packet *res;
        struct iwl_host_cmd cmd = {
                .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
                .data = (void *)&spectrum,
                .meta.flags = CMD_WANT_SKB,
        };
        u32 add_time = le64_to_cpu(params->start_time);
        int rc;
        int spectrum_resp_status;
        int duration = le16_to_cpu(params->duration);

        if (iwl_is_associated(priv))
                add_time =
                    iwl4965_usecs_to_beacons(
                        le64_to_cpu(params->start_time) - priv->last_tsf,
                        le16_to_cpu(priv->rxon_timing.beacon_interval));

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

        spectrum.channel_count = cpu_to_le16(1);
        spectrum.flags =
            RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
        spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
        cmd.len = sizeof(spectrum);
        spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));

        if (iwl_is_associated(priv))
                spectrum.start_time =
                    iwl4965_add_beacon_time(priv->last_beacon_time,
                                add_time,
                                le16_to_cpu(priv->rxon_timing.beacon_interval));
        else
                spectrum.start_time = 0;

        spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
        spectrum.channels[0].channel = params->channel;
        spectrum.channels[0].type = type;
        if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
                spectrum.flags |= RXON_FLG_BAND_24G_MSK |
                    RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;

        rc = iwl_send_cmd_sync(priv, &cmd);
        if (rc)
                return rc;

        res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
        if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
                IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
                rc = -EIO;
        }

        spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
        switch (spectrum_resp_status) {
        case 0:         /* Command will be handled */
                if (res->u.spectrum.id != 0xff) {
                        IWL_DEBUG_INFO
                            ("Replaced existing measurement: %d\n",
                             res->u.spectrum.id);
                        priv->measurement_status &= ~MEASUREMENT_READY;
                }
                priv->measurement_status |= MEASUREMENT_ACTIVE;
                rc = 0;
                break;

        case 1:         /* Command will not be handled */
                rc = -EAGAIN;
                break;
        }

        dev_kfree_skb_any(cmd.meta.u.skb);

        return rc;
}
#endif

/******************************************************************************
 *
 * Generic RX handler implementations
 *
 ******************************************************************************/
static void iwl_rx_reply_alive(struct iwl_priv *priv,
                                struct iwl_rx_mem_buffer *rxb)
{
        struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
        struct iwl_alive_resp *palive;
        struct delayed_work *pwork;

        palive = &pkt->u.alive_frame;

        IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
                       "0x%01X 0x%01X\n",
                       palive->is_valid, palive->ver_type,
                       palive->ver_subtype);

        if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
                IWL_DEBUG_INFO("Initialization Alive received.\n");
                memcpy(&priv->card_alive_init,
                       &pkt->u.alive_frame,
                       sizeof(struct iwl_init_alive_resp));
                pwork = &priv->init_alive_start;
        } else {
                IWL_DEBUG_INFO("Runtime Alive received.\n");
                memcpy(&priv->card_alive, &pkt->u.alive_frame,
                       sizeof(struct iwl_alive_resp));
                pwork = &priv->alive_start;
        }

        /* We delay the ALIVE response by 5ms to
         * give the HW RF Kill time to activate... */
        if (palive->is_valid == UCODE_VALID_OK)
                queue_delayed_work(priv->workqueue, pwork,
                                   msecs_to_jiffies(5));
        else
                IWL_WARNING("uCode did not respond OK.\n");
}

static void iwl4965_rx_reply_error(struct iwl_priv *priv,
                                   struct iwl_rx_mem_buffer *rxb)
{
        struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;

        IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
                "seq 0x%04X ser 0x%08X\n",
                le32_to_cpu(pkt->u.err_resp.error_type),
                get_cmd_string(pkt->u.err_resp.cmd_id),
                pkt->u.err_resp.cmd_id,
                le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
                le32_to_cpu(pkt->u.err_resp.error_info));
}

#define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x

static void iwl4965_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
{
        struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
        struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
        struct iwl4965_csa_notification *csa = &(pkt->u.csa_notif);
        IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
                      le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
        rxon->channel = csa->channel;
        priv->staging_rxon.channel = csa->channel;
}

static void iwl4965_rx_spectrum_measure_notif(struct iwl_priv *priv,
                                          struct iwl_rx_mem_buffer *rxb)
{
#ifdef CONFIG_IWLAGN_SPECTRUM_MEASUREMENT
        struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
        struct iwl4965_spectrum_notification *report = &(pkt->u.spectrum_notif);

        if (!report->state) {
                IWL_DEBUG(IWL_DL_11H,
                        "Spectrum Measure Notification: Start\n");
                return;
        }

        memcpy(&priv->measure_report, report, sizeof(*report));
        priv->measurement_status |= MEASUREMENT_READY;
#endif
}

static void iwl4965_rx_pm_sleep_notif(struct iwl_priv *priv,
                                      struct iwl_rx_mem_buffer *rxb)
{
#ifdef CONFIG_IWLWIFI_DEBUG
        struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
        struct iwl4965_sleep_notification *sleep = &(pkt->u.sleep_notif);
        IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
                     sleep->pm_sleep_mode, sleep->pm_wakeup_src);
#endif
}

static void iwl4965_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
                                             struct iwl_rx_mem_buffer *rxb)
{
        struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
        IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
                        "notification for %s:\n",
                        le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
        iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
}

static void iwl4965_bg_beacon_update(struct work_struct *work)
{
        struct iwl_priv *priv =
                container_of(work, struct iwl_priv, beacon_update);
        struct sk_buff *beacon;

        /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
        beacon = ieee80211_beacon_get(priv->hw, priv->vif);

        if (!beacon) {
                IWL_ERROR("update beacon failed\n");
                return;
        }

        mutex_lock(&priv->mutex);
        /* new beacon skb is allocated every time; dispose previous.*/
        if (priv->ibss_beacon)
                dev_kfree_skb(priv->ibss_beacon);

        priv->ibss_beacon = beacon;
        mutex_unlock(&priv->mutex);

        iwl4965_send_beacon_cmd(priv);
}

/**
 * iwl4965_bg_statistics_periodic - Timer callback to queue statistics
 *
 * This callback is provided in order to send a statistics request.
 *
 * This timer function is continually reset to execute within
 * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 * was received.  We need to ensure we receive the statistics in order
 * to update the temperature used for calibrating the TXPOWER.
 */
static void iwl4965_bg_statistics_periodic(unsigned long data)
{
        struct iwl_priv *priv = (struct iwl_priv *)data;

        if (test_bit(STATUS_EXIT_PENDING, &priv->status))
                return;

        iwl_send_statistics_request(priv, CMD_ASYNC);
}

static void iwl4965_rx_beacon_notif(struct iwl_priv *priv,
                                struct iwl_rx_mem_buffer *rxb)
{
#ifdef CONFIG_IWLWIFI_DEBUG
        struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
        struct iwl4965_beacon_notif *beacon = &(pkt->u.beacon_status);
        u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);

        IWL_DEBUG_RX("beacon status %x retries %d iss %d "
                "tsf %d %d rate %d\n",
                le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
                beacon->beacon_notify_hdr.failure_frame,
                le32_to_cpu(beacon->ibss_mgr_status),
                le32_to_cpu(beacon->high_tsf),
                le32_to_cpu(beacon->low_tsf), rate);
#endif

        if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
            (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
                queue_work(priv->workqueue, &priv->beacon_update);
}

/* Handle notification from uCode that card's power state is changing
 * due to software, hardware, or critical temperature RFKILL */
static void iwl4965_rx_card_state_notif(struct iwl_priv *priv,
                                    struct iwl_rx_mem_buffer *rxb)
{
        struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
        u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
        unsigned long status = priv->status;

        IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
                          (flags & HW_CARD_DISABLED) ? "Kill" : "On",
                          (flags & SW_CARD_DISABLED) ? "Kill" : "On");

        if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
                     RF_CARD_DISABLED)) {

                iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
                            CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);

                if (!iwl_grab_nic_access(priv)) {
                        iwl_write_direct32(
                                priv, HBUS_TARG_MBX_C,
                                HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);

                        iwl_release_nic_access(priv);
                }

                if (!(flags & RXON_CARD_DISABLED)) {
                        iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
                                    CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
                        if (!iwl_grab_nic_access(priv)) {
                                iwl_write_direct32(
                                        priv, HBUS_TARG_MBX_C,
                                        HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);

                                iwl_release_nic_access(priv);
                        }
                }

                if (flags & RF_CARD_DISABLED) {
                        iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
                                    CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
                        iwl_read32(priv, CSR_UCODE_DRV_GP1);
                        if (!iwl_grab_nic_access(priv))
                                iwl_release_nic_access(priv);
                }
        }

        if (flags & HW_CARD_DISABLED)
                set_bit(STATUS_RF_KILL_HW, &priv->status);
        else
                clear_bit(STATUS_RF_KILL_HW, &priv->status);


        if (flags & SW_CARD_DISABLED)
                set_bit(STATUS_RF_KILL_SW, &priv->status);
        else
                clear_bit(STATUS_RF_KILL_SW, &priv->status);

        if (!(flags & RXON_CARD_DISABLED))
                iwl_scan_cancel(priv);

        if ((test_bit(STATUS_RF_KILL_HW, &status) !=
             test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
            (test_bit(STATUS_RF_KILL_SW, &status) !=
             test_bit(STATUS_RF_KILL_SW, &priv->status)))
                queue_work(priv->workqueue, &priv->rf_kill);
        else
                wake_up_interruptible(&priv->wait_command_queue);
}

int iwl4965_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
{
        int ret;
        unsigned long flags;

        spin_lock_irqsave(&priv->lock, flags);
        ret = iwl_grab_nic_access(priv);
        if (ret)
                goto err;

        if (src == IWL_PWR_SRC_VAUX) {
                u32 val;
                ret = pci_read_config_dword(priv->pci_dev, PCI_POWER_SOURCE,
                                            &val);

                if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT)
                        iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
                                               APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
                                               ~APMG_PS_CTRL_MSK_PWR_SRC);
        } else {
                iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
                                       APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
                                       ~APMG_PS_CTRL_MSK_PWR_SRC);
        }

        iwl_release_nic_access(priv);
err:
        spin_unlock_irqrestore(&priv->lock, flags);
        return ret;
}

/**
 * iwl4965_setup_rx_handlers - Initialize Rx handler callbacks
 *
 * Setup the RX handlers for each of the reply types sent from the uCode
 * to the host.
 *
 * This function chains into the hardware specific files for them to setup
 * any hardware specific handlers as well.
 */
static void iwl_setup_rx_handlers(struct iwl_priv *priv)
{
        priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
        priv->rx_handlers[REPLY_ERROR] = iwl4965_rx_reply_error;
        priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl4965_rx_csa;
        priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
            iwl4965_rx_spectrum_measure_notif;
        priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl4965_rx_pm_sleep_notif;
        priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
            iwl4965_rx_pm_debug_statistics_notif;
        priv->rx_handlers[BEACON_NOTIFICATION] = iwl4965_rx_beacon_notif;

        /*
         * The same handler is used for both the REPLY to a discrete
         * statistics request from the host as well as for the periodic
         * statistics notifications (after received beacons) from the uCode.
         */
        priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_rx_statistics;
        priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics;

        iwl_setup_rx_scan_handlers(priv);

        /* status change handler */
        priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl4965_rx_card_state_notif;

        priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
            iwl_rx_missed_beacon_notif;
        /* Rx handlers */
        priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl_rx_reply_rx_phy;
        priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl_rx_reply_rx;
        /* block ack */
        priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl_rx_reply_compressed_ba;
        /* Set up hardware specific Rx handlers */
        priv->cfg->ops->lib->rx_handler_setup(priv);
}

/*
 * this should be called while priv->lock is locked
*/
static void __iwl_rx_replenish(struct iwl_priv *priv)
{
        iwl_rx_allocate(priv);
        iwl_rx_queue_restock(priv);
}


/**
 * iwl_rx_handle - Main entry function for receiving responses from uCode
 *
 * Uses the priv->rx_handlers callback function array to invoke
 * the appropriate handlers, including command responses,
 * frame-received notifications, and other notifications.
 */
void iwl_rx_handle(struct iwl_priv *priv)
{
        struct iwl_rx_mem_buffer *rxb;
        struct iwl_rx_packet *pkt;
        struct iwl_rx_queue *rxq = &priv->rxq;
        u32 r, i;
        int reclaim;
        unsigned long flags;
        u8 fill_rx = 0;
        u32 count = 8;

        /* uCode's read index (stored in shared DRAM) indicates the last Rx
         * buffer that the driver may process (last buffer filled by ucode). */
        r = priv->cfg->ops->lib->shared_mem_rx_idx(priv);
        i = rxq->read;

        /* Rx interrupt, but nothing sent from uCode */
        if (i == r)
                IWL_DEBUG(IWL_DL_RX, "r = %d, i = %d\n", r, i);

        if (iwl_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
                fill_rx = 1;

        while (i != r) {
                rxb = rxq->queue[i];

                /* If an RXB doesn't have a Rx queue slot associated with it,
                 * then a bug has been introduced in the queue refilling
                 * routines -- catch it here */
                BUG_ON(rxb == NULL);

                rxq->queue[i] = NULL;

                pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
                                            priv->hw_params.rx_buf_size,
                                            PCI_DMA_FROMDEVICE);
                pkt = (struct iwl_rx_packet *)rxb->skb->data;

                /* Reclaim a command buffer only if this packet is a response
                 *   to a (driver-originated) command.
                 * If the packet (e.g. Rx frame) originated from uCode,
                 *   there is no command buffer to reclaim.
                 * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
                 *   but apparently a few don't get set; catch them here. */
                reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
                        (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
                        (pkt->hdr.cmd != REPLY_RX) &&
                        (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
                        (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
                        (pkt->hdr.cmd != REPLY_TX);

                /* Based on type of command response or notification,
                 *   handle those that need handling via function in
                 *   rx_handlers table.  See iwl4965_setup_rx_handlers() */
                if (priv->rx_handlers[pkt->hdr.cmd]) {
                        IWL_DEBUG(IWL_DL_RX, "r = %d, i = %d, %s, 0x%02x\n", r,
                                i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
                        priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
                } else {
                        /* No handling needed */
                        IWL_DEBUG(IWL_DL_RX,
                                "r %d i %d No handler needed for %s, 0x%02x\n",
                                r, i, get_cmd_string(pkt->hdr.cmd),
                                pkt->hdr.cmd);
                }

                if (reclaim) {
                        /* Invoke any callbacks, transfer the skb to caller, and
                         * fire off the (possibly) blocking iwl_send_cmd()
                         * as we reclaim the driver command queue */
                        if (rxb && rxb->skb)
                                iwl_tx_cmd_complete(priv, rxb);
                        else
                                IWL_WARNING("Claim null rxb?\n");
                }

                /* For now we just don't re-use anything.  We can tweak this
                 * later to try and re-use notification packets and SKBs that
                 * fail to Rx correctly */
                if (rxb->skb != NULL) {
                        priv->alloc_rxb_skb--;
                        dev_kfree_skb_any(rxb->skb);
                        rxb->skb = NULL;
                }

                pci_unmap_single(priv->pci_dev, rxb->dma_addr,
                                 priv->hw_params.rx_buf_size,
                                 PCI_DMA_FROMDEVICE);
                spin_lock_irqsave(&rxq->lock, flags);
                list_add_tail(&rxb->list, &priv->rxq.rx_used);
                spin_unlock_irqrestore(&rxq->lock, flags);
                i = (i + 1) & RX_QUEUE_MASK;
                /* If there are a lot of unused frames,
                 * restock the Rx queue so ucode wont assert. */
                if (fill_rx) {
                        count++;
                        if (count >= 8) {
                                priv->rxq.read = i;
                                __iwl_rx_replenish(priv);
                                count = 0;
                        }
                }
        }

        /* Backtrack one entry */
        priv->rxq.read = i;
        iwl_rx_queue_restock(priv);
}

#ifdef CONFIG_IWLWIFI_DEBUG
static void iwl4965_print_rx_config_cmd(struct iwl_priv *priv)
{
        struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
        DECLARE_MAC_BUF(mac);

        IWL_DEBUG_RADIO("RX CONFIG:\n");
        iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
        IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
        IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
        IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
                        le32_to_cpu(rxon->filter_flags));
        IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
        IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
                        rxon->ofdm_basic_rates);
        IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
        IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
                        print_mac(mac, rxon->node_addr));
        IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
                        print_mac(mac, rxon->bssid_addr));
        IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
}
#endif

static void iwl4965_enable_interrupts(struct iwl_priv *priv)
{
        IWL_DEBUG_ISR("Enabling interrupts\n");
        set_bit(STATUS_INT_ENABLED, &priv->status);
        iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
}

/* call this function to flush any scheduled tasklet */
static inline void iwl_synchronize_irq(struct iwl_priv *priv)
{
        /* wait to make sure we flush pedding tasklet*/
        synchronize_irq(priv->pci_dev->irq);
        tasklet_kill(&priv->irq_tasklet);
}

static inline void iwl4965_disable_interrupts(struct iwl_priv *priv)
{
        clear_bit(STATUS_INT_ENABLED, &priv->status);

        /* disable interrupts from uCode/NIC to host */
        iwl_write32(priv, CSR_INT_MASK, 0x00000000);

        /* acknowledge/clear/reset any interrupts still pending
         * from uCode or flow handler (Rx/Tx DMA) */
        iwl_write32(priv, CSR_INT, 0xffffffff);
        iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
        IWL_DEBUG_ISR("Disabled interrupts\n");
}


/**
 * iwl4965_irq_handle_error - called for HW or SW error interrupt from card
 */
static void iwl4965_irq_handle_error(struct iwl_priv *priv)
{
        /* Set the FW error flag -- cleared on iwl4965_down */
        set_bit(STATUS_FW_ERROR, &priv->status);

        /* Cancel currently queued command. */
        clear_bit(STATUS_HCMD_ACTIVE, &priv->status);

#ifdef CONFIG_IWLWIFI_DEBUG
        if (priv->debug_level & IWL_DL_FW_ERRORS) {
                iwl_dump_nic_error_log(priv);
                iwl_dump_nic_event_log(priv);
                iwl4965_print_rx_config_cmd(priv);
        }
#endif

        wake_up_interruptible(&priv->wait_command_queue);

        /* Keep the restart process from trying to send host
         * commands by clearing the INIT status bit */
        clear_bit(STATUS_READY, &priv->status);

        if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
                IWL_DEBUG(IWL_DL_FW_ERRORS,
                          "Restarting adapter due to uCode error.\n");

                if (iwl_is_associated(priv)) {
                        memcpy(&priv->recovery_rxon, &priv->active_rxon,
                               sizeof(priv->recovery_rxon));
                        priv->error_recovering = 1;
                }
                if (priv->cfg->mod_params->restart_fw)
                        queue_work(priv->workqueue, &priv->restart);
        }
}

static void iwl4965_error_recovery(struct iwl_priv *priv)
{
        unsigned long flags;

        memcpy(&priv->staging_rxon, &priv->recovery_rxon,
               sizeof(priv->staging_rxon));
        priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
        iwl4965_commit_rxon(priv);

        iwl_rxon_add_station(priv, priv->bssid, 1);

        spin_lock_irqsave(&priv->lock, flags);
        priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
        priv->error_recovering = 0;
        spin_unlock_irqrestore(&priv->lock, flags);
}

static void iwl4965_irq_tasklet(struct iwl_priv *priv)
{
        u32 inta, handled = 0;
        u32 inta_fh;
        unsigned long flags;
#ifdef CONFIG_IWLWIFI_DEBUG
        u32 inta_mask;
#endif

        spin_lock_irqsave(&priv->lock, flags);

        /* Ack/clear/reset pending uCode interrupts.
         * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
         *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
        inta = iwl_read32(priv, CSR_INT);
        iwl_write32(priv, CSR_INT, inta);

        /* Ack/clear/reset pending flow-handler (DMA) interrupts.
         * Any new interrupts that happen after this, either while we're
         * in this tasklet, or later, will show up in next ISR/tasklet. */
        inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
        iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);

#ifdef CONFIG_IWLWIFI_DEBUG
        if (priv->debug_level & IWL_DL_ISR) {
                /* just for debug */
                inta_mask = iwl_read32(priv, CSR_INT_MASK);
                IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
                              inta, inta_mask, inta_fh);
        }
#endif

        /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
         * atomic, make sure that inta covers all the interrupts that
         * we've discovered, even if FH interrupt came in just after
         * reading CSR_INT. */
        if (inta_fh & CSR49_FH_INT_RX_MASK)
                inta |= CSR_INT_BIT_FH_RX;
        if (inta_fh & CSR49_FH_INT_TX_MASK)
                inta |= CSR_INT_BIT_FH_TX;

        /* Now service all interrupt bits discovered above. */
        if (inta & CSR_INT_BIT_HW_ERR) {
                IWL_ERROR("Microcode HW error detected.  Restarting.\n");

                /* Tell the device to stop sending interrupts */
                iwl4965_disable_interrupts(priv);

                iwl4965_irq_handle_error(priv);

                handled |= CSR_INT_BIT_HW_ERR;

                spin_unlock_irqrestore(&priv->lock, flags);

                return;
        }

#ifdef CONFIG_IWLWIFI_DEBUG
        if (priv->debug_level & (IWL_DL_ISR)) {
                /* NIC fires this, but we don't use it, redundant with WAKEUP */
                if (inta & CSR_INT_BIT_SCD)
                        IWL_DEBUG_ISR("Scheduler finished to transmit "
                                      "the frame/frames.\n");

                /* Alive notification via Rx interrupt will do the real work */
                if (inta & CSR_INT_BIT_ALIVE)
                        IWL_DEBUG_ISR("Alive interrupt\n");
        }
#endif
        /* Safely ignore these bits for debug checks below */
        inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);

        /* HW RF KILL switch toggled */
        if (inta & CSR_INT_BIT_RF_KILL) {
                int hw_rf_kill = 0;
                if (!(iwl_read32(priv, CSR_GP_CNTRL) &
                                CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
                        hw_rf_kill = 1;

                IWL_DEBUG(IWL_DL_RF_KILL, "RF_KILL bit toggled to %s.\n",
                                hw_rf_kill ? "disable radio":"enable radio");

                /* driver only loads ucode once setting the interface up.
                 * the driver as well won't allow loading if RFKILL is set
                 * therefore no need to restart the driver from this handler
                 */
                if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status))
                        clear_bit(STATUS_RF_KILL_HW, &priv->status);

                handled |= CSR_INT_BIT_RF_KILL;
        }

        /* Chip got too hot and stopped itself */
        if (inta & CSR_INT_BIT_CT_KILL) {
                IWL_ERROR("Microcode CT kill error detected.\n");
                handled |= CSR_INT_BIT_CT_KILL;
        }

        /* Error detected by uCode */
        if (inta & CSR_INT_BIT_SW_ERR) {
                IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
                          inta);
                iwl4965_irq_handle_error(priv);
                handled |= CSR_INT_BIT_SW_ERR;
        }

        /* uCode wakes up after power-down sleep */
        if (inta & CSR_INT_BIT_WAKEUP) {
                IWL_DEBUG_ISR("Wakeup interrupt\n");
                iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
                iwl_txq_update_write_ptr(priv, &priv->txq[0]);
                iwl_txq_update_write_ptr(priv, &priv->txq[1]);
                iwl_txq_update_write_ptr(priv, &priv->txq[2]);
                iwl_txq_update_write_ptr(priv, &priv->txq[3]);
                iwl_txq_update_write_ptr(priv, &priv->txq[4]);
                iwl_txq_update_write_ptr(priv, &priv->txq[5]);

                handled |= CSR_INT_BIT_WAKEUP;
        }

        /* All uCode command responses, including Tx command responses,
         * Rx "responses" (frame-received notification), and other
         * notifications from uCode come through here*/
        if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
                iwl_rx_handle(priv);
                handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
        }

        if (inta & CSR_INT_BIT_FH_TX) {
                IWL_DEBUG_ISR("Tx interrupt\n");
                handled |= CSR_INT_BIT_FH_TX;
                /* FH finished to write, send event */
                priv->ucode_write_complete = 1;
                wake_up_interruptible(&priv->wait_command_queue);
        }

        if (inta & ~handled)
                IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);

        if (inta & ~CSR_INI_SET_MASK) {
                IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
                         inta & ~CSR_INI_SET_MASK);
                IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
        }

        /* Re-enable all interrupts */
        /* only Re-enable if diabled by irq */
        if (test_bit(STATUS_INT_ENABLED, &priv->status))
                iwl4965_enable_interrupts(priv);

#ifdef CONFIG_IWLWIFI_DEBUG
        if (priv->debug_level & (IWL_DL_ISR)) {
                inta = iwl_read32(priv, CSR_INT);
                inta_mask = iwl_read32(priv, CSR_INT_MASK);
                inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
                IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
                        "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
        }
#endif
        spin_unlock_irqrestore(&priv->lock, flags);
}

static irqreturn_t iwl4965_isr(int irq, void *data)
{
        struct iwl_priv *priv = data;
        u32 inta, inta_mask;
        u32 inta_fh;
        if (!priv)
                return IRQ_NONE;

        spin_lock(&priv->lock);

        /* Disable (but don't clear!) interrupts here to avoid
         *    back-to-back ISRs and sporadic interrupts from our NIC.
         * If we have something to service, the tasklet will re-enable ints.
         * If we *don't* have something, we'll re-enable before leaving here. */
        inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
        iwl_write32(priv, CSR_INT_MASK, 0x00000000);

        /* Discover which interrupts are active/pending */
        inta = iwl_read32(priv, CSR_INT);
        inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);

        /* Ignore interrupt if there's nothing in NIC to service.
         * This may be due to IRQ shared with another device,
         * or due to sporadic interrupts thrown from our NIC. */
        if (!inta && !inta_fh) {
                IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
                goto none;
        }

        if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
                /* Hardware disappeared. It might have already raised
                 * an interrupt */
                IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
                goto unplugged;
        }

        IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
                      inta, inta_mask, inta_fh);

        inta &= ~CSR_INT_BIT_SCD;

        /* iwl4965_irq_tasklet() will service interrupts and re-enable them */
        if (likely(inta || inta_fh))
                tasklet_schedule(&priv->irq_tasklet);

 unplugged:
        spin_unlock(&priv->lock);
        return IRQ_HANDLED;

 none:
        /* re-enable interrupts here since we don't have anything to service. */
        /* only Re-enable if diabled by irq */
        if (test_bit(STATUS_INT_ENABLED, &priv->status))
                iwl4965_enable_interrupts(priv);
        spin_unlock(&priv->lock);
        return IRQ_NONE;
}

/******************************************************************************
 *
 * uCode download functions
 *
 ******************************************************************************/

static void iwl4965_dealloc_ucode_pci(struct iwl_priv *priv)
{
        iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
        iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
        iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
        iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
        iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
        iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
}

static void iwl4965_nic_start(struct iwl_priv *priv)
{
        /* Remove all resets to allow NIC to operate */
        iwl_write32(priv, CSR_RESET, 0);
}


/**
 * iwl4965_read_ucode - Read uCode images from disk file.
 *
 * Copy into buffers for card to fetch via bus-mastering
 */
static int iwl4965_read_ucode(struct iwl_priv *priv)
{
        struct iwl_ucode *ucode;
        int ret;
        const struct firmware *ucode_raw;
        const char *name = priv->cfg->fw_name;
        u8 *src;
        size_t len;
        u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;

        /* Ask kernel firmware_class module to get the boot firmware off disk.
         * request_firmware() is synchronous, file is in memory on return. */
        ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
        if (ret < 0) {
                IWL_ERROR("%s firmware file req failed: Reason %d\n",
                                        name, ret);
                goto error;
        }

        IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
                       name, ucode_raw->size);

        /* Make sure that we got at least our header! */
        if (ucode_raw->size < sizeof(*ucode)) {
                IWL_ERROR("File size way too small!\n");
                ret = -EINVAL;
                goto err_release;
        }

        /* Data from ucode file:  header followed by uCode images */
        ucode = (void *)ucode_raw->data;

        ver = le32_to_cpu(ucode->ver);
        inst_size = le32_to_cpu(ucode->inst_size);
        data_size = le32_to_cpu(ucode->data_size);
        init_size = le32_to_cpu(ucode->init_size);
        init_data_size = le32_to_cpu(ucode->init_data_size);
        boot_size = le32_to_cpu(ucode->boot_size);

        IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
        IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
                       inst_size);
        IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
                       data_size);
        IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
                       init_size);
        IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
                       init_data_size);
        IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
                       boot_size);

        /* Verify size of file vs. image size info in file's header */
        if (ucode_raw->size < sizeof(*ucode) +
                inst_size + data_size + init_size +
                init_data_size + boot_size) {

                IWL_DEBUG_INFO("uCode file size %d too small\n",
                               (int)ucode_raw->size);
                ret = -EINVAL;
                goto err_release;
        }

        /* Verify that uCode images will fit in card's SRAM */
        if (inst_size > priv->hw_params.max_inst_size) {
                IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
                               inst_size);
                ret = -EINVAL;
                goto err_release;
        }

        if (data_size > priv->hw_params.max_data_size) {
                IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
                                data_size);
                ret = -EINVAL;
                goto err_release;
        }
        if (init_size > priv->hw_params.max_inst_size) {
                IWL_DEBUG_INFO
                    ("uCode init instr len %d too large to fit in\n",
                      init_size);
                ret = -EINVAL;
                goto err_release;
        }
        if (init_data_size > priv->hw_params.max_data_size) {
                IWL_DEBUG_INFO
                    ("uCode init data len %d too large to fit in\n",
                      init_data_size);
                ret = -EINVAL;
                goto err_release;
        }
        if (boot_size > priv->hw_params.max_bsm_size) {
                IWL_DEBUG_INFO
                    ("uCode boot instr len %d too large to fit in\n",
                      boot_size);
                ret = -EINVAL;
                goto err_release;
        }

        /* Allocate ucode buffers for card's bus-master loading ... */

        /* Runtime instructions and 2 copies of data:
         * 1) unmodified from disk
         * 2) backup cache for save/restore during power-downs */
        priv->ucode_code.len = inst_size;
        iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);

        priv->ucode_data.len = data_size;
        iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);

        priv->ucode_data_backup.len = data_size;
        iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);

        /* Initialization instructions and data */
        if (init_size && init_data_size) {
                priv->ucode_init.len = init_size;
                iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);

                priv->ucode_init_data.len = init_data_size;
                iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);

                if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
                        goto err_pci_alloc;
        }

        /* Bootstrap (instructions only, no data) */
        if (boot_size) {
                priv->ucode_boot.len = boot_size;
                iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);

                if (!priv->ucode_boot.v_addr)
                        goto err_pci_alloc;
        }

        /* Copy images into buffers for card's bus-master reads ... */

        /* Runtime instructions (first block of data in file) */
        src = &ucode->data[0];
        len = priv->ucode_code.len;
        IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
        memcpy(priv->ucode_code.v_addr, src, len);
        IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
                priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);

        /* Runtime data (2nd block)
         * NOTE:  Copy into backup buffer will be done in iwl4965_up()  */
        src = &ucode->data[inst_size];
        len = priv->ucode_data.len;
        IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
        memcpy(priv->ucode_data.v_addr, src, len);
        memcpy(priv->ucode_data_backup.v_addr, src, len);

        /* Initialization instructions (3rd block) */
        if (init_size) {
                src = &ucode->data[inst_size + data_size];
                len = priv->ucode_init.len;
                IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
                                len);
                memcpy(priv->ucode_init.v_addr, src, len);
        }

        /* Initialization data (4th block) */
        if (init_data_size) {
                src = &ucode->data[inst_size + data_size + init_size];
                len = priv->ucode_init_data.len;
                IWL_DEBUG_INFO("Copying (but not loading) init data len %Zd\n",
                               len);
                memcpy(priv->ucode_init_data.v_addr, src, len);
        }

        /* Bootstrap instructions (5th block) */
        src = &ucode->data[inst_size + data_size + init_size + init_data_size];
        len = priv->ucode_boot.len;
        IWL_DEBUG_INFO("Copying (but not loading) boot instr len %Zd\n", len);
        memcpy(priv->ucode_boot.v_addr, src, len);

        /* We have our copies now, allow OS release its copies */
        release_firmware(ucode_raw);
        return 0;

 err_pci_alloc:
        IWL_ERROR("failed to allocate pci memory\n");
        ret = -ENOMEM;
        iwl4965_dealloc_ucode_pci(priv);

 err_release:
        release_firmware(ucode_raw);

 error:
        return ret;
}

/**
 * iwl_alive_start - called after REPLY_ALIVE notification received
 *                   from protocol/runtime uCode (initialization uCode's
 *                   Alive gets handled by iwl_init_alive_start()).
 */
static void iwl_alive_start(struct iwl_priv *priv)
{
        int ret = 0;

        IWL_DEBUG_INFO("Runtime Alive received.\n");

        if (priv->card_alive.is_valid != UCODE_VALID_OK) {
                /* We had an error bringing up the hardware, so take it
                 * all the way back down so we can try again */
                IWL_DEBUG_INFO("Alive failed.\n");
                goto restart;
        }

        /* Initialize uCode has loaded Runtime uCode ... verify inst image.
         * This is a paranoid check, because we would not have gotten the
         * "runtime" alive if code weren't properly loaded.  */
        if (iwl_verify_ucode(priv)) {
                /* Runtime instruction load was bad;
                 * take it all the way back down so we can try again */
                IWL_DEBUG_INFO("Bad runtime uCode load.\n");
                goto restart;
        }

        iwl_clear_stations_table(priv);
        ret = priv->cfg->ops->lib->alive_notify(priv);
        if (ret) {
                IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
                            ret);
                goto restart;
        }

        /* After the ALIVE response, we can send host commands to 4965 uCode */
        set_bit(STATUS_ALIVE, &priv->status);

        if (iwl_is_rfkill(priv))
                return;

        ieee80211_wake_queues(priv->hw);

        priv->active_rate = priv->rates_mask;
        priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;

        if (iwl_is_associated(priv)) {
                struct iwl_rxon_cmd *active_rxon =
                                (struct iwl_rxon_cmd *)&priv->active_rxon;

                memcpy(&priv->staging_rxon, &priv->active_rxon,
                       sizeof(priv->staging_rxon));
                active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
        } else {
                /* Initialize our rx_config data */
                iwl4965_connection_init_rx_config(priv);
                memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
        }

        /* Configure Bluetooth device coexistence support */
        iwl4965_send_bt_config(priv);

        iwl_reset_run_time_calib(priv);

        /* Configure the adapter for unassociated operation */
        iwl4965_commit_rxon(priv);

        /* At this point, the NIC is initialized and operational */
        iwl_rf_kill_ct_config(priv);

        iwl_leds_register(priv);

        IWL_DEBUG_INFO("ALIVE processing complete.\n");
        set_bit(STATUS_READY, &priv->status);
        wake_up_interruptible(&priv->wait_command_queue);

        if (priv->error_recovering)
                iwl4965_error_recovery(priv);

        iwl_power_update_mode(priv, 1);
        ieee80211_notify_mac(priv->hw, IEEE80211_NOTIFY_RE_ASSOC);

        if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
                iwl4965_set_mode(priv, priv->iw_mode);

        return;

 restart:
        queue_work(priv->workqueue, &priv->restart);
}

static void iwl_cancel_deferred_work(struct iwl_priv *priv);

static void __iwl4965_down(struct iwl_priv *priv)
{
        unsigned long flags;
        int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);

        IWL_DEBUG_INFO(DRV_NAME " is going down\n");

        if (!exit_pending)
                set_bit(STATUS_EXIT_PENDING, &priv->status);

        iwl_leds_unregister(priv);

        iwl_clear_stations_table(priv);

        /* Unblock any waiting calls */
        wake_up_interruptible_all(&priv->wait_command_queue);

        /* Wipe out the EXIT_PENDING status bit if we are not actually
         * exiting the module */
        if (!exit_pending)
                clear_bit(STATUS_EXIT_PENDING, &priv->status);

        /* stop and reset the on-board processor */
        iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);

        /* tell the device to stop sending interrupts */
        spin_lock_irqsave(&priv->lock, flags);
        iwl4965_disable_interrupts(priv);
        spin_unlock_irqrestore(&priv->lock, flags);
        iwl_synchronize_irq(priv);

        if (priv->mac80211_registered)
                ieee80211_stop_queues(priv->hw);

        /* If we have not previously called iwl4965_init() then
         * clear all bits but the RF Kill and SUSPEND bits and return */
        if (!iwl_is_init(priv)) {
                priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
                                        STATUS_RF_KILL_HW |
                               test_bit(STATUS_RF_KILL_SW, &priv->status) <<
                                        STATUS_RF_KILL_SW |
                               test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
                                        STATUS_GEO_CONFIGURED |
                               test_bit(STATUS_IN_SUSPEND, &priv->status) <<
                                        STATUS_IN_SUSPEND |
                               test_bit(STATUS_EXIT_PENDING, &priv->status) <<
                                        STATUS_EXIT_PENDING;
                goto exit;
        }

        /* ...otherwise clear out all the status bits but the RF Kill and
         * SUSPEND bits and continue taking the NIC down. */
        priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
                                STATUS_RF_KILL_HW |
                        test_bit(STATUS_RF_KILL_SW, &priv->status) <<
                                STATUS_RF_KILL_SW |
                        test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
                                STATUS_GEO_CONFIGURED |
                        test_bit(STATUS_IN_SUSPEND, &priv->status) <<
                                STATUS_IN_SUSPEND |
                        test_bit(STATUS_FW_ERROR, &priv->status) <<
                                STATUS_FW_ERROR |
                       test_bit(STATUS_EXIT_PENDING, &priv->status) <<
                                STATUS_EXIT_PENDING;

        spin_lock_irqsave(&priv->lock, flags);
        iwl_clear_bit(priv, CSR_GP_CNTRL,
                         CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
        spin_unlock_irqrestore(&priv->lock, flags);

        iwl_txq_ctx_stop(priv);
        iwl_rxq_stop(priv);

        spin_lock_irqsave(&priv->lock, flags);
        if (!iwl_grab_nic_access(priv)) {
                iwl_write_prph(priv, APMG_CLK_DIS_REG,
                                         APMG_CLK_VAL_DMA_CLK_RQT);
                iwl_release_nic_access(priv);
        }
        spin_unlock_irqrestore(&priv->lock, flags);

        udelay(5);

        /* FIXME: apm_ops.suspend(priv) */
        priv->cfg->ops->lib->apm_ops.reset(priv);
        priv->cfg->ops->lib->free_shared_mem(priv);

 exit:
        memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));

        if (priv->ibss_beacon)
                dev_kfree_skb(priv->ibss_beacon);
        priv->ibss_beacon = NULL;

        /* clear out any free frames */
        iwl_clear_free_frames(priv);
}

static void iwl4965_down(struct iwl_priv *priv)
{
        mutex_lock(&priv->mutex);
        __iwl4965_down(priv);
        mutex_unlock(&priv->mutex);

        iwl_cancel_deferred_work(priv);
}

#define MAX_HW_RESTARTS 5

static int __iwl4965_up(struct iwl_priv *priv)
{
        int i;
        int ret;

        if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
                IWL_WARNING("Exit pending; will not bring the NIC up\n");
                return -EIO;
        }

        if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
                IWL_ERROR("ucode not available for device bringup\n");
                return -EIO;
        }

        /* If platform's RF_KILL switch is NOT set to KILL */
        if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
                clear_bit(STATUS_RF_KILL_HW, &priv->status);
        else
                set_bit(STATUS_RF_KILL_HW, &priv->status);

        if (iwl_is_rfkill(priv)) {
                iwl4965_enable_interrupts(priv);
                IWL_WARNING("Radio disabled by %s RF Kill switch\n",
                    test_bit(STATUS_RF_KILL_HW, &priv->status) ? "HW" : "SW");
                return 0;
        }

        iwl_write32(priv, CSR_INT, 0xFFFFFFFF);

        ret = priv->cfg->ops->lib->alloc_shared_mem(priv);
        if (ret) {
                IWL_ERROR("Unable to allocate shared memory\n");
                return ret;
        }

        ret = iwl_hw_nic_init(priv);
        if (ret) {
                IWL_ERROR("Unable to init nic\n");
                return ret;
        }

        /* make sure rfkill handshake bits are cleared */
        iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
        iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
                    CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);

        /* clear (again), then enable host interrupts */
        iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
        iwl4965_enable_interrupts(priv);

        /* really make sure rfkill handshake bits are cleared */
        iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
        iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);

        /* Copy original ucode data image from disk into backup cache.
         * This will be used to initialize the on-board processor's
         * data SRAM for a clean start when the runtime program first loads. */
        memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
               priv->ucode_data.len);

        for (i = 0; i < MAX_HW_RESTARTS; i++) {

                iwl_clear_stations_table(priv);

                /* load bootstrap state machine,
                 * load bootstrap program into processor's memory,
                 * prepare to load the "initialize" uCode */
                ret = priv->cfg->ops->lib->load_ucode(priv);

                if (ret) {
                        IWL_ERROR("Unable to set up bootstrap uCode: %d\n", ret);
                        continue;
                }

                /* Clear out the uCode error bit if it is set */
                clear_bit(STATUS_FW_ERROR, &priv->status);

                /* start card; "initialize" will load runtime ucode */
                iwl4965_nic_start(priv);

                IWL_DEBUG_INFO(DRV_NAME " is coming up\n");

                return 0;
        }

        set_bit(STATUS_EXIT_PENDING, &priv->status);
        __iwl4965_down(priv);
        clear_bit(STATUS_EXIT_PENDING, &priv->status);

        /* tried to restart and config the device for as long as our
         * patience could withstand */
        IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
        return -EIO;
}


/*****************************************************************************
 *
 * Workqueue callbacks
 *
 *****************************************************************************/

static void iwl_bg_init_alive_start(struct work_struct *data)
{
        struct iwl_priv *priv =
            container_of(data, struct iwl_priv, init_alive_start.work);

        if (test_bit(STATUS_EXIT_PENDING, &priv->status))
                return;

        mutex_lock(&priv->mutex);
        priv->cfg->ops->lib->init_alive_start(priv);
        mutex_unlock(&priv->mutex);
}

static void iwl_bg_alive_start(struct work_struct *data)
{
        struct iwl_priv *priv =
            container_of(data, struct iwl_priv, alive_start.work);

        if (test_bit(STATUS_EXIT_PENDING, &priv->status))
                return;

        mutex_lock(&priv->mutex);
        iwl_alive_start(priv);
        mutex_unlock(&priv->mutex);
}

static void iwl4965_bg_rf_kill(struct work_struct *work)
{
        struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);

        wake_up_interruptible(&priv->wait_command_queue);

        if (test_bit(STATUS_EXIT_PENDING, &priv->status))
                return;

        mutex_lock(&priv->mutex);

        if (!iwl_is_rfkill(priv)) {
                IWL_DEBUG(IWL_DL_RF_KILL,
                          "HW and/or SW RF Kill no longer active, restarting "
                          "device\n");
                if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
                        queue_work(priv->workqueue, &priv->restart);
        } else {
                /* make sure mac80211 stop sending Tx frame */
                if (priv->mac80211_registered)
                        ieee80211_stop_queues(priv->hw);

                if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
                        IWL_DEBUG_RF_KILL("Can not turn radio back on - "
                                          "disabled by SW switch\n");
                else
                        IWL_WARNING("Radio Frequency Kill Switch is On:\n"
                                    "Kill switch must be turned off for "
                                    "wireless networking to work.\n");
        }
        mutex_unlock(&priv->mutex);
        iwl_rfkill_set_hw_state(priv);
}

static void iwl4965_bg_set_monitor(struct work_struct *work)
{
        struct iwl_priv *priv = container_of(work,
                                struct iwl_priv, set_monitor);
        int ret;

        IWL_DEBUG(IWL_DL_STATE, "setting monitor mode\n");

        mutex_lock(&priv->mutex);

        ret = iwl4965_set_mode(priv, IEEE80211_IF_TYPE_MNTR);

        if (ret) {
                if (ret == -EAGAIN)
                        IWL_DEBUG(IWL_DL_STATE, "leave - not ready\n");
                else
                        IWL_ERROR("iwl4965_set_mode() failed ret = %d\n", ret);
        }

        mutex_unlock(&priv->mutex);
}

static void iwl_bg_run_time_calib_work(struct work_struct *work)
{
        struct iwl_priv *priv = container_of(work, struct iwl_priv,
                        run_time_calib_work);

        mutex_lock(&priv->mutex);

        if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
            test_bit(STATUS_SCANNING, &priv->status)) {
                mutex_unlock(&priv->mutex);
                return;
        }

        if (priv->start_calib) {
                iwl_chain_noise_calibration(priv, &priv->statistics);

                iwl_sensitivity_calibration(priv, &priv->statistics);
        }

        mutex_unlock(&priv->mutex);
        return;
}

static void iwl4965_bg_up(struct work_struct *data)
{
        struct iwl_priv *priv = container_of(data, struct iwl_priv, up);

        if (test_bit(STATUS_EXIT_PENDING, &priv->status))
                return;

        mutex_lock(&priv->mutex);
        __iwl4965_up(priv);
        mutex_unlock(&priv->mutex);
        iwl_rfkill_set_hw_state(priv);
}

static void iwl4965_bg_restart(struct work_struct *data)
{
        struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);

        if (test_bit(STATUS_EXIT_PENDING, &priv->status))
                return;

        iwl4965_down(priv);
        queue_work(priv->workqueue, &priv->up);
}

static void iwl4965_bg_rx_replenish(struct work_struct *data)
{
        struct iwl_priv *priv =
            container_of(data, struct iwl_priv, rx_replenish);

        if (test_bit(STATUS_EXIT_PENDING, &priv->status))
                return;

        mutex_lock(&priv->mutex);
        iwl_rx_replenish(priv);
        mutex_unlock(&priv->mutex);
}

#define IWL_DELAY_NEXT_SCAN (HZ*2)

static void iwl4965_post_associate(struct iwl_priv *priv)
{
        struct ieee80211_conf *conf = NULL;
        int ret = 0;
        DECLARE_MAC_BUF(mac);
        unsigned long flags;

        if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
                IWL_ERROR("%s Should not be called in AP mode\n", __func__);
                return;
        }

        IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
                        priv->assoc_id,
                        print_mac(mac, priv->active_rxon.bssid_addr));


        if (test_bit(STATUS_EXIT_PENDING, &priv->status))
                return;


        if (!priv->vif || !priv->is_open)
                return;

        iwl_scan_cancel_timeout(priv, 200);

        conf = ieee80211_get_hw_conf(priv->hw);

        priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
        iwl4965_commit_rxon(priv);

        memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
        iwl4965_setup_rxon_timing(priv);
        ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
                              sizeof(priv->rxon_timing), &priv->rxon_timing);
        if (ret)
                IWL_WARNING("REPLY_RXON_TIMING failed - "
                            "Attempting to continue.\n");

        priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;

        if (priv->current_ht_config.is_ht)
                iwl_set_rxon_ht(priv, &priv->current_ht_config);

        iwl_set_rxon_chain(priv);
        priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);

        IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
                        priv->assoc_id, priv->beacon_int);

        if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
                priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
        else
                priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;

        if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
                if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
                        priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
                else
                        priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;

                if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
                        priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;

        }

        iwl4965_commit_rxon(priv);

        switch (priv->iw_mode) {
        case IEEE80211_IF_TYPE_STA:
                break;

        case IEEE80211_IF_TYPE_IBSS:

                /* assume default assoc id */
                priv->assoc_id = 1;

                iwl_rxon_add_station(priv, priv->bssid, 0);
                iwl4965_send_beacon_cmd(priv);

                break;

        default:
                IWL_ERROR("%s Should not be called in %d mode\n",
                          __func__, priv->iw_mode);
                break;
        }

        /* Enable Rx differential gain and sensitivity calibrations */
        iwl_chain_noise_reset(priv);
        priv->start_calib = 1;

        if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
                priv->assoc_station_added = 1;

        spin_lock_irqsave(&priv->lock, flags);
        iwl_activate_qos(priv, 0);
        spin_unlock_irqrestore(&priv->lock, flags);

        iwl_power_update_mode(priv, 0);
        /* we have just associated, don't start scan too early */
        priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
}

static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);

static void iwl_bg_scan_completed(struct work_struct *work)
{
        struct iwl_priv *priv =
            container_of(work, struct iwl_priv, scan_completed);

        IWL_DEBUG_SCAN("SCAN complete scan\n");

        if (test_bit(STATUS_EXIT_PENDING, &priv->status))
                return;

        if (test_bit(STATUS_CONF_PENDING, &priv->status))
                iwl4965_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));

        ieee80211_scan_completed(priv->hw);

        /* Since setting the TXPOWER may have been deferred while
         * performing the scan, fire one off */
        mutex_lock(&priv->mutex);
        iwl_set_tx_power(priv, priv->tx_power_user_lmt, true);
        mutex_unlock(&priv->mutex);
}

/*****************************************************************************
 *
 * mac80211 entry point functions
 *
 *****************************************************************************/

#define UCODE_READY_TIMEOUT     (4 * HZ)

static int iwl4965_mac_start(struct ieee80211_hw *hw)
{
        struct iwl_priv *priv = hw->priv;
        int ret;
        u16 pci_cmd;

        IWL_DEBUG_MAC80211("enter\n");

        if (pci_enable_device(priv->pci_dev)) {
                IWL_ERROR("Fail to pci_enable_device\n");
                return -ENODEV;
        }
        pci_restore_state(priv->pci_dev);
        pci_enable_msi(priv->pci_dev);

        /* enable interrupts if needed: hw bug w/a */
        pci_read_config_word(priv->pci_dev, PCI_COMMAND, &pci_cmd);
        if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
                pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
                pci_write_config_word(priv->pci_dev, PCI_COMMAND, pci_cmd);
        }

        ret = request_irq(priv->pci_dev->irq, iwl4965_isr, IRQF_SHARED,
                          DRV_NAME, priv);
        if (ret) {
                IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
                goto out_disable_msi;
        }

        /* we should be verifying the device is ready to be opened */
        mutex_lock(&priv->mutex);

        memset(&priv->staging_rxon, 0, sizeof(struct iwl_rxon_cmd));
        /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
         * ucode filename and max sizes are card-specific. */

        if (!priv->ucode_code.len) {
                ret = iwl4965_read_ucode(priv);
                if (ret) {
                        IWL_ERROR("Could not read microcode: %d\n", ret);
                        mutex_unlock(&priv->mutex);
                        goto out_release_irq;
                }
        }

        ret = __iwl4965_up(priv);

        mutex_unlock(&priv->mutex);

        iwl_rfkill_set_hw_state(priv);

        if (ret)
                goto out_release_irq;

        if (iwl_is_rfkill(priv))
                goto out;

        IWL_DEBUG_INFO("Start UP work done.\n");

        if (test_bit(STATUS_IN_SUSPEND, &priv->status))
                return 0;

        /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
         * mac80211 will not be run successfully. */
        ret = wait_event_interruptible_timeout(priv->wait_command_queue,
                        test_bit(STATUS_READY, &priv->status),
                        UCODE_READY_TIMEOUT);
        if (!ret) {
                if (!test_bit(STATUS_READY, &priv->status)) {
                        IWL_ERROR("START_ALIVE timeout after %dms.\n",
                                jiffies_to_msecs(UCODE_READY_TIMEOUT));
                        ret = -ETIMEDOUT;
                        goto out_release_irq;
                }
        }

out:
        priv->is_open = 1;
        IWL_DEBUG_MAC80211("leave\n");
        return 0;

out_release_irq:
        free_irq(priv->pci_dev->irq, priv);
out_disable_msi:
        pci_disable_msi(priv->pci_dev);
        pci_disable_device(priv->pci_dev);
        priv->is_open = 0;
        IWL_DEBUG_MAC80211("leave - failed\n");
        return ret;
}

static void iwl4965_mac_stop(struct ieee80211_hw *hw)
{
        struct iwl_priv *priv = hw->priv;

        IWL_DEBUG_MAC80211("enter\n");

        if (!priv->is_open) {
                IWL_DEBUG_MAC80211("leave - skip\n");
                return;
        }

        priv->is_open = 0;

        if (iwl_is_ready_rf(priv)) {
                /* stop mac, cancel any scan request and clear
                 * RXON_FILTER_ASSOC_MSK BIT
                 */
                mutex_lock(&priv->mutex);
                iwl_scan_cancel_timeout(priv, 100);
                mutex_unlock(&priv->mutex);
        }

        iwl4965_down(priv);

        flush_workqueue(priv->workqueue);
        free_irq(priv->pci_dev->irq, priv);
        pci_disable_msi(priv->pci_dev);
        pci_save_state(priv->pci_dev);
        pci_disable_device(priv->pci_dev);

        IWL_DEBUG_MAC80211("leave\n");
}

static int iwl4965_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
{
        struct iwl_priv *priv = hw->priv;

        IWL_DEBUG_MACDUMP("enter\n");

        if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
                IWL_DEBUG_MAC80211("leave - monitor\n");
                dev_kfree_skb_any(skb);
                return 0;
        }

        IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
                     ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);

        if (iwl_tx_skb(priv, skb))
                dev_kfree_skb_any(skb);

        IWL_DEBUG_MACDUMP("leave\n");
        return 0;
}

static int iwl4965_mac_add_interface(struct ieee80211_hw *hw,
                                 struct ieee80211_if_init_conf *conf)
{
        struct iwl_priv *priv = hw->priv;
        unsigned long flags;
        DECLARE_MAC_BUF(mac);

        IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);

        if (priv->vif) {
                IWL_DEBUG_MAC80211("leave - vif != NULL\n");
                return -EOPNOTSUPP;
        }

        spin_lock_irqsave(&priv->lock, flags);
        priv->vif = conf->vif;

        spin_unlock_irqrestore(&priv->lock, flags);

        mutex_lock(&priv->mutex);

        if (conf->mac_addr) {
                IWL_DEBUG_MAC80211("Set %s\n", print_mac(mac, conf->mac_addr));
                memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
        }

        if (iwl4965_set_mode(priv, conf->type) == -EAGAIN)
                /* we are not ready, will run again when ready */
                set_bit(STATUS_MODE_PENDING, &priv->status);

        mutex_unlock(&priv->mutex);

        IWL_DEBUG_MAC80211("leave\n");
        return 0;
}

/**
 * iwl4965_mac_config - mac80211 config callback
 *
 * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
 * be set inappropriately and the driver currently sets the hardware up to
 * use it whenever needed.
 */
static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
{
        struct iwl_priv *priv = hw->priv;
        const struct iwl_channel_info *ch_info;
        unsigned long flags;
        int ret = 0;
        u16 channel;

        mutex_lock(&priv->mutex);
        IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);

        priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);

        if (conf->radio_enabled && iwl_radio_kill_sw_enable_radio(priv)) {
                IWL_DEBUG_MAC80211("leave - RF-KILL - waiting for uCode\n");
                goto out;
        }

        if (!conf->radio_enabled)
                iwl_radio_kill_sw_disable_radio(priv);

        if (!iwl_is_ready(priv)) {
                IWL_DEBUG_MAC80211("leave - not ready\n");
                ret = -EIO;
                goto out;
        }

        if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
                     test_bit(STATUS_SCANNING, &priv->status))) {
                IWL_DEBUG_MAC80211("leave - scanning\n");
                set_bit(STATUS_CONF_PENDING, &priv->status);
                mutex_unlock(&priv->mutex);
                return 0;
        }

        channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
        ch_info = iwl_get_channel_info(priv, conf->channel->band, channel);
        if (!is_channel_valid(ch_info)) {
                IWL_DEBUG_MAC80211("leave - invalid channel\n");
                ret = -EINVAL;
                goto out;
        }

        if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS &&
            !is_channel_ibss(ch_info)) {
                IWL_ERROR("channel %d in band %d not IBSS channel\n",
                        conf->channel->hw_value, conf->channel->band);
                ret = -EINVAL;
                goto out;
        }

        spin_lock_irqsave(&priv->lock, flags);


        /* if we are switching from ht to 2.4 clear flags
         * from any ht related info since 2.4 does not
         * support ht */
        if ((le16_to_cpu(priv->staging_rxon.channel) != channel)
#ifdef IEEE80211_CONF_CHANNEL_SWITCH
            && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
#endif
        )
                priv->staging_rxon.flags = 0;

        iwl_set_rxon_channel(priv, conf->channel->band, channel);

        iwl_set_flags_for_band(priv, conf->channel->band);

        /* The list of supported rates and rate mask can be different
         * for each band; since the band may have changed, reset
         * the rate mask to what mac80211 lists */
        iwl4965_set_rate(priv);

        spin_unlock_irqrestore(&priv->lock, flags);

#ifdef IEEE80211_CONF_CHANNEL_SWITCH
        if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
                iwl4965_hw_channel_switch(priv, conf->channel);
                goto out;
        }
#endif

        if (!conf->radio_enabled) {
                IWL_DEBUG_MAC80211("leave - radio disabled\n");
                goto out;
        }

        if (iwl_is_rfkill(priv)) {
                IWL_DEBUG_MAC80211("leave - RF kill\n");
                ret = -EIO;
                goto out;
        }

        IWL_DEBUG_MAC80211("TX Power old=%d new=%d\n",
                           priv->tx_power_user_lmt, conf->power_level);

        iwl_set_tx_power(priv, conf->power_level, false);

        iwl4965_set_rate(priv);

        if (memcmp(&priv->active_rxon,
                   &priv->staging_rxon, sizeof(priv->staging_rxon)))
                iwl4965_commit_rxon(priv);
        else
                IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");

        IWL_DEBUG_MAC80211("leave\n");

out:
        clear_bit(STATUS_CONF_PENDING, &priv->status);
        mutex_unlock(&priv->mutex);
        return ret;
}

static void iwl4965_config_ap(struct iwl_priv *priv)
{
        int ret = 0;
        unsigned long flags;

        if (test_bit(STATUS_EXIT_PENDING, &priv->status))
                return;

        /* The following should be done only at AP bring up */
        if (!(iwl_is_associated(priv))) {

                /* RXON - unassoc (to set timing command) */
                priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
                iwl4965_commit_rxon(priv);

                /* RXON Timing */
                memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
                iwl4965_setup_rxon_timing(priv);
                ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
                                sizeof(priv->rxon_timing), &priv->rxon_timing);
                if (ret)
                        IWL_WARNING("REPLY_RXON_TIMING failed - "
                                        "Attempting to continue.\n");

                iwl_set_rxon_chain(priv);

                /* FIXME: what should be the assoc_id for AP? */
                priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
                if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
                        priv->staging_rxon.flags |=
                                RXON_FLG_SHORT_PREAMBLE_MSK;
                else
                        priv->staging_rxon.flags &=
                                ~RXON_FLG_SHORT_PREAMBLE_MSK;

                if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
                        if (priv->assoc_capability &
                                WLAN_CAPABILITY_SHORT_SLOT_TIME)
                                priv->staging_rxon.flags |=
                                        RXON_FLG_SHORT_SLOT_MSK;
                        else
                                priv->staging_rxon.flags &=
                                        ~RXON_FLG_SHORT_SLOT_MSK;

                        if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
                                priv->staging_rxon.flags &=
                                        ~RXON_FLG_SHORT_SLOT_MSK;
                }
                /* restore RXON assoc */
                priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
                iwl4965_commit_rxon(priv);
                spin_lock_irqsave(&priv->lock, flags);
                iwl_activate_qos(priv, 1);
                spin_unlock_irqrestore(&priv->lock, flags);
                iwl_rxon_add_station(priv, iwl_bcast_addr, 0);
        }
        iwl4965_send_beacon_cmd(priv);

        /* FIXME - we need to add code here to detect a totally new
         * configuration, reset the AP, unassoc, rxon timing, assoc,
         * clear sta table, add BCAST sta... */
}

/* temporary */
static int iwl4965_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb);

static int iwl4965_mac_config_interface(struct ieee80211_hw *hw,
                                        struct ieee80211_vif *vif,
                                    struct ieee80211_if_conf *conf)
{
        struct iwl_priv *priv = hw->priv;
        DECLARE_MAC_BUF(mac);
        unsigned long flags;
        int rc;

        if (conf == NULL)
                return -EIO;

        if (priv->vif != vif) {
                IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
                return 0;
        }

        if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS &&
            conf->changed & IEEE80211_IFCC_BEACON) {
                struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
                if (!beacon)
                        return -ENOMEM;
                rc = iwl4965_mac_beacon_update(hw, beacon);
                if (rc)
                        return rc;
        }

        if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
            (!conf->ssid_len)) {
                IWL_DEBUG_MAC80211
                    ("Leaving in AP mode because HostAPD is not ready.\n");
                return 0;
        }

        if (!iwl_is_alive(priv))
                return -EAGAIN;

        mutex_lock(&priv->mutex);

        if (conf->bssid)
                IWL_DEBUG_MAC80211("bssid: %s\n",
                                   print_mac(mac, conf->bssid));

/*
 * very dubious code was here; the probe filtering flag is never set:
 *
        if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
            !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
 */

        if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
                if (!conf->bssid) {
                        conf->bssid = priv->mac_addr;
                        memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
                        IWL_DEBUG_MAC80211("bssid was set to: %s\n",
                                           print_mac(mac, conf->bssid));
                }
                if (priv->ibss_beacon)
                        dev_kfree_skb(priv->ibss_beacon);

                priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
        }

        if (iwl_is_rfkill(priv))
                goto done;

        if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
            !is_multicast_ether_addr(conf->bssid)) {
                /* If there is currently a HW scan going on in the background
                 * then we need to cancel it else the RXON below will fail. */
                if (iwl_scan_cancel_timeout(priv, 100)) {
                        IWL_WARNING("Aborted scan still in progress "
                                    "after 100ms\n");
                        IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
                        mutex_unlock(&priv->mutex);
                        return -EAGAIN;
                }
                memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);

                /* TODO: Audit driver for usage of these members and see
                 * if mac80211 deprecates them (priv->bssid looks like it
                 * shouldn't be there, but I haven't scanned the IBSS code
                 * to verify) - jpk */
                memcpy(priv->bssid, conf->bssid, ETH_ALEN);

                if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
                        iwl4965_config_ap(priv);
                else {
                        rc = iwl4965_commit_rxon(priv);
                        if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
                                iwl_rxon_add_station(
                                        priv, priv->active_rxon.bssid_addr, 1);
                }

        } else {
                iwl_scan_cancel_timeout(priv, 100);
                priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
                iwl4965_commit_rxon(priv);
        }

 done:
        spin_lock_irqsave(&priv->lock, flags);
        if (!conf->ssid_len)
                memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
        else
                memcpy(priv->essid, conf->ssid, conf->ssid_len);

        priv->essid_len = conf->ssid_len;
        spin_unlock_irqrestore(&priv->lock, flags);

        IWL_DEBUG_MAC80211("leave\n");
        mutex_unlock(&priv->mutex);

        return 0;
}

static void iwl4965_configure_filter(struct ieee80211_hw *hw,
                                 unsigned int changed_flags,
                                 unsigned int *total_flags,
                                 int mc_count, struct dev_addr_list *mc_list)
{
        struct iwl_priv *priv = hw->priv;

        if (changed_flags & (*total_flags) & FIF_OTHER_BSS) {
                IWL_DEBUG_MAC80211("Enter: type %d (0x%x, 0x%x)\n",
                                   IEEE80211_IF_TYPE_MNTR,
                                   changed_flags, *total_flags);
                /* queue work 'cuz mac80211 is holding a lock which
                 * prevents us from issuing (synchronous) f/w cmds */
                queue_work(priv->workqueue, &priv->set_monitor);
        }
        *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI |
                        FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
}

static void iwl4965_mac_remove_interface(struct ieee80211_hw *hw,
                                     struct ieee80211_if_init_conf *conf)
{
        struct iwl_priv *priv = hw->priv;

        IWL_DEBUG_MAC80211("enter\n");

        mutex_lock(&priv->mutex);

        if (iwl_is_ready_rf(priv)) {
                iwl_scan_cancel_timeout(priv, 100);
                priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
                iwl4965_commit_rxon(priv);
        }
        if (priv->vif == conf->vif) {
                priv->vif = NULL;
                memset(priv->bssid, 0, ETH_ALEN);
                memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
                priv->essid_len = 0;
        }
        mutex_unlock(&priv->mutex);

        IWL_DEBUG_MAC80211("leave\n");

}

#define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
static void iwl4965_bss_info_changed(struct ieee80211_hw *hw,
                                     struct ieee80211_vif *vif,
                                     struct ieee80211_bss_conf *bss_conf,
                                     u32 changes)
{
        struct iwl_priv *priv = hw->priv;

        IWL_DEBUG_MAC80211("changes = 0x%X\n", changes);

        if (changes & BSS_CHANGED_ERP_PREAMBLE) {
                IWL_DEBUG_MAC80211("ERP_PREAMBLE %d\n",
                                   bss_conf->use_short_preamble);
                if (bss_conf->use_short_preamble)
                        priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
                else
                        priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
        }

        if (changes & BSS_CHANGED_ERP_CTS_PROT) {
                IWL_DEBUG_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
                if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
                        priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
                else
                        priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
        }

        if (changes & BSS_CHANGED_HT) {
                IWL_DEBUG_MAC80211("HT %d\n", bss_conf->assoc_ht);
                iwl4965_ht_conf(priv, bss_conf);
                iwl_set_rxon_chain(priv);
        }

        if (changes & BSS_CHANGED_ASSOC) {
                IWL_DEBUG_MAC80211("ASSOC %d\n", bss_conf->assoc);
                /* This should never happen as this function should
                 * never be called from interrupt context. */
                if (WARN_ON_ONCE(in_interrupt()))
                        return;
                if (bss_conf->assoc) {
                        priv->assoc_id = bss_conf->aid;
                        priv->beacon_int = bss_conf->beacon_int;
                        priv->power_data.dtim_period = bss_conf->dtim_period;
                        priv->timestamp = bss_conf->timestamp;
                        priv->assoc_capability = bss_conf->assoc_capability;
                        priv->next_scan_jiffies = jiffies +
                                        IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
                        mutex_lock(&priv->mutex);
                        iwl4965_post_associate(priv);
                        mutex_unlock(&priv->mutex);
                } else {
                        priv->assoc_id = 0;
                        IWL_DEBUG_MAC80211("DISASSOC %d\n", bss_conf->assoc);
                }
        } else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
                        IWL_DEBUG_MAC80211("Associated Changes %d\n", changes);
                        iwl_send_rxon_assoc(priv);
        }

}

static int iwl4965_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
{
        int rc = 0;
        unsigned long flags;
        struct iwl_priv *priv = hw->priv;

        IWL_DEBUG_MAC80211("enter\n");

        mutex_lock(&priv->mutex);
        spin_lock_irqsave(&priv->lock, flags);

        if (!iwl_is_ready_rf(priv)) {
                rc = -EIO;
                IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
                goto out_unlock;
        }

        if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
                rc = -EIO;
                IWL_ERROR("ERROR: APs don't scan\n");
                goto out_unlock;
        }

        /* we don't schedule scan within next_scan_jiffies period */
        if (priv->next_scan_jiffies &&
                        time_after(priv->next_scan_jiffies, jiffies)) {
                rc = -EAGAIN;
                goto out_unlock;
        }
        /* if we just finished scan ask for delay */
        if (priv->last_scan_jiffies && time_after(priv->last_scan_jiffies +
                                IWL_DELAY_NEXT_SCAN, jiffies)) {
                rc = -EAGAIN;
                goto out_unlock;
        }
        if (len) {
                IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
                               iwl_escape_essid(ssid, len), (int)len);

                priv->one_direct_scan = 1;
                priv->direct_ssid_len = (u8)
                    min((u8) len, (u8) IW_ESSID_MAX_SIZE);
                memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
        } else
                priv->one_direct_scan = 0;

        rc = iwl_scan_initiate(priv);

        IWL_DEBUG_MAC80211("leave\n");

out_unlock:
        spin_unlock_irqrestore(&priv->lock, flags);
        mutex_unlock(&priv->mutex);

        return rc;
}

static void iwl4965_mac_update_tkip_key(struct ieee80211_hw *hw,
                        struct ieee80211_key_conf *keyconf, const u8 *addr,
                        u32 iv32, u16 *phase1key)
{
        struct iwl_priv *priv = hw->priv;
        u8 sta_id = IWL_INVALID_STATION;
        unsigned long flags;
        __le16 key_flags = 0;
        int i;
        DECLARE_MAC_BUF(mac);

        IWL_DEBUG_MAC80211("enter\n");

        sta_id = iwl_find_station(priv, addr);
        if (sta_id == IWL_INVALID_STATION) {
                IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
                                   print_mac(mac, addr));
                return;
        }

        iwl_scan_cancel_timeout(priv, 100);

        key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
        key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
        key_flags &= ~STA_KEY_FLG_INVALID;

        if (sta_id == priv->hw_params.bcast_sta_id)
                key_flags |= STA_KEY_MULTICAST_MSK;

        spin_lock_irqsave(&priv->sta_lock, flags);

        priv->stations[sta_id].sta.key.key_flags = key_flags;
        priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;

        for (i = 0; i < 5; i++)
                priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
                        cpu_to_le16(phase1key[i]);

        priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
        priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;

        iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);

        spin_unlock_irqrestore(&priv->sta_lock, flags);

        IWL_DEBUG_MAC80211("leave\n");
}

static int iwl4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
                           const u8 *local_addr, const u8 *addr,
                           struct ieee80211_key_conf *key)
{
        struct iwl_priv *priv = hw->priv;
        DECLARE_MAC_BUF(mac);
        int ret = 0;
        u8 sta_id = IWL_INVALID_STATION;
        u8 is_default_wep_key = 0;

        IWL_DEBUG_MAC80211("enter\n");

        if (priv->hw_params.sw_crypto) {
                IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
                return -EOPNOTSUPP;
        }

        if (is_zero_ether_addr(addr))
                /* only support pairwise keys */
                return -EOPNOTSUPP;

        sta_id = iwl_find_station(priv, addr);
        if (sta_id == IWL_INVALID_STATION) {
                IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
                                   print_mac(mac, addr));
                return -EINVAL;

        }

        mutex_lock(&priv->mutex);
        iwl_scan_cancel_timeout(priv, 100);
        mutex_unlock(&priv->mutex);

        /* If we are getting WEP group key and we didn't receive any key mapping
         * so far, we are in legacy wep mode (group key only), otherwise we are
         * in 1X mode.
         * In legacy wep mode, we use another host command to the uCode */
        if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
                priv->iw_mode != IEEE80211_IF_TYPE_AP) {
                if (cmd == SET_KEY)
                        is_default_wep_key = !priv->key_mapping_key;
                else
                        is_default_wep_key =
                                        (key->hw_key_idx == HW_KEY_DEFAULT);
        }

        switch (cmd) {
        case SET_KEY:
                if (is_default_wep_key)
                        ret = iwl_set_default_wep_key(priv, key);
                else
                        ret = iwl_set_dynamic_key(priv, key, sta_id);

                IWL_DEBUG_MAC80211("enable hwcrypto key\n");
                break;
        case DISABLE_KEY:
                if (is_default_wep_key)
                        ret = iwl_remove_default_wep_key(priv, key);
                else
                        ret = iwl_remove_dynamic_key(priv, key, sta_id);

                IWL_DEBUG_MAC80211("disable hwcrypto key\n");
                break;
        default:
                ret = -EINVAL;
        }

        IWL_DEBUG_MAC80211("leave\n");

        return ret;
}

static int iwl4965_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
                           const struct ieee80211_tx_queue_params *params)
{
        struct iwl_priv *priv = hw->priv;
        unsigned long flags;
        int q;

        IWL_DEBUG_MAC80211("enter\n");

        if (!iwl_is_ready_rf(priv)) {
                IWL_DEBUG_MAC80211("leave - RF not ready\n");
                return -EIO;
        }

        if (queue >= AC_NUM) {
                IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
                return 0;
        }

        if (!priv->qos_data.qos_enable) {
                priv->qos_data.qos_active = 0;
                IWL_DEBUG_MAC80211("leave - qos not enabled\n");
                return 0;
        }
        q = AC_NUM - 1 - queue;

        spin_lock_irqsave(&priv->lock, flags);

        priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
        priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
        priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
        priv->qos_data.def_qos_parm.ac[q].edca_txop =
                        cpu_to_le16((params->txop * 32));

        priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
        priv->qos_data.qos_active = 1;

        if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
                iwl_activate_qos(priv, 1);
        else if (priv->assoc_id && iwl_is_associated(priv))
                iwl_activate_qos(priv, 0);

        spin_unlock_irqrestore(&priv->lock, flags);

        IWL_DEBUG_MAC80211("leave\n");
        return 0;
}

static int iwl4965_mac_ampdu_action(struct ieee80211_hw *hw,
                             enum ieee80211_ampdu_mlme_action action,
                             const u8 *addr, u16 tid, u16 *ssn)
{
        struct iwl_priv *priv = hw->priv;
        DECLARE_MAC_BUF(mac);

        IWL_DEBUG_HT("A-MPDU action on addr %s tid %d\n",
                     print_mac(mac, addr), tid);

        if (!(priv->cfg->sku & IWL_SKU_N))
                return -EACCES;

        switch (action) {
        case IEEE80211_AMPDU_RX_START:
                IWL_DEBUG_HT("start Rx\n");
                return iwl_rx_agg_start(priv, addr, tid, *ssn);
        case IEEE80211_AMPDU_RX_STOP:
                IWL_DEBUG_HT("stop Rx\n");
                return iwl_rx_agg_stop(priv, addr, tid);
        case IEEE80211_AMPDU_TX_START:
                IWL_DEBUG_HT("start Tx\n");
                return iwl_tx_agg_start(priv, addr, tid, ssn);
        case IEEE80211_AMPDU_TX_STOP:
                IWL_DEBUG_HT("stop Tx\n");
                return iwl_tx_agg_stop(priv, addr, tid);
        default:
                IWL_DEBUG_HT("unknown\n");
                return -EINVAL;
                break;
        }
        return 0;
}
static int iwl4965_mac_get_tx_stats(struct ieee80211_hw *hw,
                                struct ieee80211_tx_queue_stats *stats)
{
        struct iwl_priv *priv = hw->priv;
        int i, avail;
        struct iwl_tx_queue *txq;
        struct iwl_queue *q;
        unsigned long flags;

        IWL_DEBUG_MAC80211("enter\n");

        if (!iwl_is_ready_rf(priv)) {
                IWL_DEBUG_MAC80211("leave - RF not ready\n");
                return -EIO;
        }

        spin_lock_irqsave(&priv->lock, flags);

        for (i = 0; i < AC_NUM; i++) {
                txq = &priv->txq[i];
                q = &txq->q;
                avail = iwl_queue_space(q);

                stats[i].len = q->n_window - avail;
                stats[i].limit = q->n_window - q->high_mark;
                stats[i].count = q->n_window;

        }
        spin_unlock_irqrestore(&priv->lock, flags);

        IWL_DEBUG_MAC80211("leave\n");

        return 0;
}

static int iwl4965_mac_get_stats(struct ieee80211_hw *hw,
                             struct ieee80211_low_level_stats *stats)
{
        struct iwl_priv *priv = hw->priv;

        priv = hw->priv;
        IWL_DEBUG_MAC80211("enter\n");
        IWL_DEBUG_MAC80211("leave\n");

        return 0;
}

static void iwl4965_mac_reset_tsf(struct ieee80211_hw *hw)
{
        struct iwl_priv *priv = hw->priv;
        unsigned long flags;

        mutex_lock(&priv->mutex);
        IWL_DEBUG_MAC80211("enter\n");

        spin_lock_irqsave(&priv->lock, flags);
        memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
        spin_unlock_irqrestore(&priv->lock, flags);

        iwl_reset_qos(priv);

        spin_lock_irqsave(&priv->lock, flags);
        priv->assoc_id = 0;
        priv->assoc_capability = 0;
        priv->assoc_station_added = 0;

        /* new association get rid of ibss beacon skb */
        if (priv->ibss_beacon)
                dev_kfree_skb(priv->ibss_beacon);

        priv->ibss_beacon = NULL;

        priv->beacon_int = priv->hw->conf.beacon_int;
        priv->timestamp = 0;
        if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
                priv->beacon_int = 0;

        spin_unlock_irqrestore(&priv->lock, flags);

        if (!iwl_is_ready_rf(priv)) {
                IWL_DEBUG_MAC80211("leave - not ready\n");
                mutex_unlock(&priv->mutex);
                return;
        }

        /* we are restarting association process
         * clear RXON_FILTER_ASSOC_MSK bit
         */
        if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
                iwl_scan_cancel_timeout(priv, 100);
                priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
                iwl4965_commit_rxon(priv);
        }

        iwl_power_update_mode(priv, 0);

        /* Per mac80211.h: This is only used in IBSS mode... */
        if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {

                IWL_DEBUG_MAC80211("leave - not in IBSS\n");
                mutex_unlock(&priv->mutex);
                return;
        }

        iwl4965_set_rate(priv);

        mutex_unlock(&priv->mutex);

        IWL_DEBUG_MAC80211("leave\n");
}

static int iwl4965_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
{
        struct iwl_priv *priv = hw->priv;
        unsigned long flags;
        __le64 timestamp;

        mutex_lock(&priv->mutex);
        IWL_DEBUG_MAC80211("enter\n");

        if (!iwl_is_ready_rf(priv)) {
                IWL_DEBUG_MAC80211("leave - RF not ready\n");
                mutex_unlock(&priv->mutex);
                return -EIO;
        }

        if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
                IWL_DEBUG_MAC80211("leave - not IBSS\n");
                mutex_unlock(&priv->mutex);
                return -EIO;
        }

        spin_lock_irqsave(&priv->lock, flags);

        if (priv->ibss_beacon)
                dev_kfree_skb(priv->ibss_beacon);

        priv->ibss_beacon = skb;

        priv->assoc_id = 0;
        timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
        priv->timestamp = le64_to_cpu(timestamp);

        IWL_DEBUG_MAC80211("leave\n");
        spin_unlock_irqrestore(&priv->lock, flags);

        iwl_reset_qos(priv);

        iwl4965_post_associate(priv);

        mutex_unlock(&priv->mutex);

        return 0;
}

/*****************************************************************************
 *
 * sysfs attributes
 *
 *****************************************************************************/

#ifdef CONFIG_IWLWIFI_DEBUG

/*
 * The following adds a new attribute to the sysfs representation
 * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
 * used for controlling the debug level.
 *
 * See the level definitions in iwl for details.
 */

static ssize_t show_debug_level(struct device *d,
                                struct device_attribute *attr, char *buf)
{
        struct iwl_priv *priv = d->driver_data;

        return sprintf(buf, "0x%08X\n", priv->debug_level);
}
static ssize_t store_debug_level(struct device *d,
                                struct device_attribute *attr,
                                 const char *buf, size_t count)
{
        struct iwl_priv *priv = d->driver_data;
        char *p = (char *)buf;
        u32 val;

        val = simple_strtoul(p, &p, 0);
        if (p == buf)
                printk(KERN_INFO DRV_NAME
                       ": %s is not in hex or decimal form.\n", buf);
        else
                priv->debug_level = val;

        return strnlen(buf, count);
}

static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
                        show_debug_level, store_debug_level);


#endif /* CONFIG_IWLWIFI_DEBUG */


static ssize_t show_version(struct device *d,
                                struct device_attribute *attr, char *buf)
{
        struct iwl_priv *priv = d->driver_data;
        struct iwl_alive_resp *palive = &priv->card_alive;
        ssize_t pos = 0;
        u16 eeprom_ver;

        if (palive->is_valid)
                pos += sprintf(buf + pos,
                                "fw version: 0x%01X.0x%01X.0x%01X.0x%01X\n"
                                "fw type: 0x%01X 0x%01X\n",
                                palive->ucode_major, palive->ucode_minor,
                                palive->sw_rev[0], palive->sw_rev[1],
                                palive->ver_type, palive->ver_subtype);
        else
                pos += sprintf(buf + pos, "fw not loaded\n");

        if (priv->eeprom) {
                eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
                pos += sprintf(buf + pos, "EEPROM version: 0x%x\n",
                                 eeprom_ver);
        } else {
                pos += sprintf(buf + pos, "EEPROM not initialzed\n");
        }

        return pos;
}

static DEVICE_ATTR(version, S_IWUSR | S_IRUGO, show_version, NULL);

static ssize_t show_temperature(struct device *d,
                                struct device_attribute *attr, char *buf)
{
        struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;

        if (!iwl_is_alive(priv))
                return -EAGAIN;

        return sprintf(buf, "%d\n", priv->temperature);
}

static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);

static ssize_t show_tx_power(struct device *d,
                             struct device_attribute *attr, char *buf)
{
        struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
        return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
}

static ssize_t store_tx_power(struct device *d,
                              struct device_attribute *attr,
                              const char *buf, size_t count)
{
        struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
        char *p = (char *)buf;
        u32 val;

        val = simple_strtoul(p, &p, 10);
        if (p == buf)
                printk(KERN_INFO DRV_NAME
                       ": %s is not in decimal form.\n", buf);
        else
                iwl_set_tx_power(priv, val, false);

        return count;
}

static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);

static ssize_t show_flags(struct device *d,
                          struct device_attribute *attr, char *buf)
{
        struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;

        return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
}

static ssize_t store_flags(struct device *d,
                           struct device_attribute *attr,
                           const char *buf, size_t count)
{
        struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
        u32 flags = simple_strtoul(buf, NULL, 0);

        mutex_lock(&priv->mutex);
        if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
                /* Cancel any currently running scans... */
                if (iwl_scan_cancel_timeout(priv, 100))
                        IWL_WARNING("Could not cancel scan.\n");
                else {
                        IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
                                       flags);
                        priv->staging_rxon.flags = cpu_to_le32(flags);
                        iwl4965_commit_rxon(priv);
                }
        }
        mutex_unlock(&priv->mutex);

        return count;
}

static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);

static ssize_t show_filter_flags(struct device *d,
                                 struct device_attribute *attr, char *buf)
{
        struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;

        return sprintf(buf, "0x%04X\n",
                le32_to_cpu(priv->active_rxon.filter_flags));
}

static ssize_t store_filter_flags(struct device *d,
                                  struct device_attribute *attr,
                                  const char *buf, size_t count)
{
        struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
        u32 filter_flags = simple_strtoul(buf, NULL, 0);

        mutex_lock(&priv->mutex);
        if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
                /* Cancel any currently running scans... */
                if (iwl_scan_cancel_timeout(priv, 100))
                        IWL_WARNING("Could not cancel scan.\n");
                else {
                        IWL_DEBUG_INFO("Committing rxon.filter_flags = "
                                       "0x%04X\n", filter_flags);
                        priv->staging_rxon.filter_flags =
                                cpu_to_le32(filter_flags);
                        iwl4965_commit_rxon(priv);
                }
        }
        mutex_unlock(&priv->mutex);

        return count;
}

static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
                   store_filter_flags);

#ifdef CONFIG_IWLAGN_SPECTRUM_MEASUREMENT

static ssize_t show_measurement(struct device *d,
                                struct device_attribute *attr, char *buf)
{
        struct iwl_priv *priv = dev_get_drvdata(d);
        struct iwl4965_spectrum_notification measure_report;
        u32 size = sizeof(measure_report), len = 0, ofs = 0;
        u8 *data = (u8 *)&measure_report;
        unsigned long flags;

        spin_lock_irqsave(&priv->lock, flags);
        if (!(priv->measurement_status & MEASUREMENT_READY)) {
                spin_unlock_irqrestore(&priv->lock, flags);
                return 0;
        }
        memcpy(&measure_report, &priv->measure_report, size);
        priv->measurement_status = 0;
        spin_unlock_irqrestore(&priv->lock, flags);

        while (size && (PAGE_SIZE - len)) {
                hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
                                   PAGE_SIZE - len, 1);
                len = strlen(buf);
                if (PAGE_SIZE - len)
                        buf[len++] = '\n';

                ofs += 16;
                size -= min(size, 16U);
        }

        return len;
}

static ssize_t store_measurement(struct device *d,
                                 struct device_attribute *attr,
                                 const char *buf, size_t count)
{
        struct iwl_priv *priv = dev_get_drvdata(d);
        struct ieee80211_measurement_params params = {
                .channel = le16_to_cpu(priv->active_rxon.channel),
                .start_time = cpu_to_le64(priv->last_tsf),
                .duration = cpu_to_le16(1),
        };
        u8 type = IWL_MEASURE_BASIC;
        u8 buffer[32];
        u8 channel;

        if (count) {
                char *p = buffer;
                strncpy(buffer, buf, min(sizeof(buffer), count));
                channel = simple_strtoul(p, NULL, 0);
                if (channel)
                        params.channel = channel;

                p = buffer;
                while (*p && *p != ' ')
                        p++;
                if (*p)
                        type = simple_strtoul(p + 1, NULL, 0);
        }

        IWL_DEBUG_INFO("Invoking measurement of type %d on "
                       "channel %d (for '%s')\n", type, params.channel, buf);
        iwl4965_get_measurement(priv, &params, type);

        return count;
}

static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
                   show_measurement, store_measurement);
#endif /* CONFIG_IWLAGN_SPECTRUM_MEASUREMENT */

static ssize_t store_retry_rate(struct device *d,
                                struct device_attribute *attr,
                                const char *buf, size_t count)
{
        struct iwl_priv *priv = dev_get_drvdata(d);

        priv->retry_rate = simple_strtoul(buf, NULL, 0);
        if (priv->retry_rate <= 0)
                priv->retry_rate = 1;

        return count;
}

static ssize_t show_retry_rate(struct device *d,
                               struct device_attribute *attr, char *buf)
{
        struct iwl_priv *priv = dev_get_drvdata(d);
        return sprintf(buf, "%d", priv->retry_rate);
}

static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
                   store_retry_rate);

static ssize_t store_power_level(struct device *d,
                                 struct device_attribute *attr,
                                 const char *buf, size_t count)
{
        struct iwl_priv *priv = dev_get_drvdata(d);
        int ret;
        int mode;

        mode = simple_strtoul(buf, NULL, 0);
        mutex_lock(&priv->mutex);

        if (!iwl_is_ready(priv)) {
                ret = -EAGAIN;
                goto out;
        }

        ret = iwl_power_set_user_mode(priv, mode);
        if (ret) {
                IWL_DEBUG_MAC80211("failed setting power mode.\n");
                goto out;
        }
        ret = count;

 out:
        mutex_unlock(&priv->mutex);
        return ret;
}

static ssize_t show_power_level(struct device *d,
                                struct device_attribute *attr, char *buf)
{
        struct iwl_priv *priv = dev_get_drvdata(d);
        int mode = priv->power_data.user_power_setting;
        int system = priv->power_data.system_power_setting;
        int level = priv->power_data.power_mode;
        char *p = buf;

        switch (system) {
        case IWL_POWER_SYS_AUTO:
                p += sprintf(p, "SYSTEM:auto");
                break;
        case IWL_POWER_SYS_AC:
                p += sprintf(p, "SYSTEM:ac");
                break;
        case IWL_POWER_SYS_BATTERY:
                p += sprintf(p, "SYSTEM:battery");
                break;
        }

        p += sprintf(p, "\tMODE:%s", (mode < IWL_POWER_AUTO)?"fixed":"auto");
        p += sprintf(p, "\tINDEX:%d", level);
        p += sprintf(p, "\n");
        return p - buf + 1;
}

static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
                   store_power_level);

static ssize_t show_channels(struct device *d,
                             struct device_attribute *attr, char *buf)
{

        struct iwl_priv *priv = dev_get_drvdata(d);
        struct ieee80211_channel *channels = NULL;
        const struct ieee80211_supported_band *supp_band = NULL;
        int len = 0, i;
        int count = 0;

        if (!test_bit(STATUS_GEO_CONFIGURED, &priv->status))
                return -EAGAIN;

        supp_band = iwl_get_hw_mode(priv, IEEE80211_BAND_2GHZ);
        channels = supp_band->channels;
        count = supp_band->n_channels;

        len += sprintf(&buf[len],
                        "Displaying %d channels in 2.4GHz band "
                        "(802.11bg):\n", count);

        for (i = 0; i < count; i++)
                len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
                                ieee80211_frequency_to_channel(
                                channels[i].center_freq),
                                channels[i].max_power,
                                channels[i].flags & IEEE80211_CHAN_RADAR ?
                                " (IEEE 802.11h required)" : "",
                                (!(channels[i].flags & IEEE80211_CHAN_NO_IBSS)
                                || (channels[i].flags &
                                IEEE80211_CHAN_RADAR)) ? "" :
                                ", IBSS",
                                channels[i].flags &
                                IEEE80211_CHAN_PASSIVE_SCAN ?
                                "passive only" : "active/passive");

        supp_band = iwl_get_hw_mode(priv, IEEE80211_BAND_5GHZ);
        channels = supp_band->channels;
        count = supp_band->n_channels;

        len += sprintf(&buf[len], "Displaying %d channels in 5.2GHz band "
                        "(802.11a):\n", count);

        for (i = 0; i < count; i++)
                len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
                                ieee80211_frequency_to_channel(
                                channels[i].center_freq),
                                channels[i].max_power,
                                channels[i].flags & IEEE80211_CHAN_RADAR ?
                                " (IEEE 802.11h required)" : "",
                                ((channels[i].flags & IEEE80211_CHAN_NO_IBSS)
                                || (channels[i].flags &
                                IEEE80211_CHAN_RADAR)) ? "" :
                                ", IBSS",
                                channels[i].flags &
                                IEEE80211_CHAN_PASSIVE_SCAN ?
                                "passive only" : "active/passive");

        return len;
}

static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);

static ssize_t show_statistics(struct device *d,
                               struct device_attribute *attr, char *buf)
{
        struct iwl_priv *priv = dev_get_drvdata(d);
        u32 size = sizeof(struct iwl_notif_statistics);
        u32 len = 0, ofs = 0;
        u8 *data = (u8 *)&priv->statistics;
        int rc = 0;

        if (!iwl_is_alive(priv))
                return -EAGAIN;

        mutex_lock(&priv->mutex);
        rc = iwl_send_statistics_request(priv, 0);
        mutex_unlock(&priv->mutex);

        if (rc) {
                len = sprintf(buf,
                              "Error sending statistics request: 0x%08X\n", rc);
                return len;
        }

        while (size && (PAGE_SIZE - len)) {
                hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
                                   PAGE_SIZE - len, 1);
                len = strlen(buf);
                if (PAGE_SIZE - len)
                        buf[len++] = '\n';

                ofs += 16;
                size -= min(size, 16U);
        }

        return len;
}

static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);

static ssize_t show_status(struct device *d,
                           struct device_attribute *attr, char *buf)
{
        struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
        if (!iwl_is_alive(priv))
                return -EAGAIN;
        return sprintf(buf, "0x%08x\n", (int)priv->status);
}

static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);

/*****************************************************************************
 *
 * driver setup and teardown
 *
 *****************************************************************************/

static void iwl_setup_deferred_work(struct iwl_priv *priv)
{
        priv->workqueue = create_workqueue(DRV_NAME);

        init_waitqueue_head(&priv->wait_command_queue);

        INIT_WORK(&priv->up, iwl4965_bg_up);
        INIT_WORK(&priv->restart, iwl4965_bg_restart);
        INIT_WORK(&priv->rx_replenish, iwl4965_bg_rx_replenish);
        INIT_WORK(&priv->rf_kill, iwl4965_bg_rf_kill);
        INIT_WORK(&priv->beacon_update, iwl4965_bg_beacon_update);
        INIT_WORK(&priv->set_monitor, iwl4965_bg_set_monitor);
        INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
        INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
        INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);

        /* FIXME : remove when resolved PENDING */
        INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
        iwl_setup_scan_deferred_work(priv);

        if (priv->cfg->ops->lib->setup_deferred_work)
                priv->cfg->ops->lib->setup_deferred_work(priv);

        init_timer(&priv->statistics_periodic);
        priv->statistics_periodic.data = (unsigned long)priv;
        priv->statistics_periodic.function = iwl4965_bg_statistics_periodic;

        tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
                     iwl4965_irq_tasklet, (unsigned long)priv);
}

static void iwl_cancel_deferred_work(struct iwl_priv *priv)
{
        if (priv->cfg->ops->lib->cancel_deferred_work)
                priv->cfg->ops->lib->cancel_deferred_work(priv);

        cancel_delayed_work_sync(&priv->init_alive_start);
        cancel_delayed_work(&priv->scan_check);
        cancel_delayed_work(&priv->alive_start);
        cancel_work_sync(&priv->beacon_update);
        del_timer_sync(&priv->statistics_periodic);
}

static struct attribute *iwl4965_sysfs_entries[] = {
        &dev_attr_channels.attr,
        &dev_attr_flags.attr,
        &dev_attr_filter_flags.attr,
#ifdef CONFIG_IWLAGN_SPECTRUM_MEASUREMENT
        &dev_attr_measurement.attr,
#endif
        &dev_attr_power_level.attr,
        &dev_attr_retry_rate.attr,
        &dev_attr_statistics.attr,
        &dev_attr_status.attr,
        &dev_attr_temperature.attr,
        &dev_attr_tx_power.attr,
#ifdef CONFIG_IWLWIFI_DEBUG
        &dev_attr_debug_level.attr,
#endif
        &dev_attr_version.attr,

        NULL
};

static struct attribute_group iwl4965_attribute_group = {
        .name = NULL,           /* put in device directory */
        .attrs = iwl4965_sysfs_entries,
};

static struct ieee80211_ops iwl4965_hw_ops = {
        .tx = iwl4965_mac_tx,
        .start = iwl4965_mac_start,
        .stop = iwl4965_mac_stop,
        .add_interface = iwl4965_mac_add_interface,
        .remove_interface = iwl4965_mac_remove_interface,
        .config = iwl4965_mac_config,
        .config_interface = iwl4965_mac_config_interface,
        .configure_filter = iwl4965_configure_filter,
        .set_key = iwl4965_mac_set_key,
        .update_tkip_key = iwl4965_mac_update_tkip_key,
        .get_stats = iwl4965_mac_get_stats,
        .get_tx_stats = iwl4965_mac_get_tx_stats,
        .conf_tx = iwl4965_mac_conf_tx,
        .reset_tsf = iwl4965_mac_reset_tsf,
        .bss_info_changed = iwl4965_bss_info_changed,
        .ampdu_action = iwl4965_mac_ampdu_action,
        .hw_scan = iwl4965_mac_hw_scan
};

static int iwl4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
        int err = 0;
        struct iwl_priv *priv;
        struct ieee80211_hw *hw;
        struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
        unsigned long flags;
        DECLARE_MAC_BUF(mac);

        /************************
         * 1. Allocating HW data
         ************************/

        /* Disabling hardware scan means that mac80211 will perform scans
         * "the hard way", rather than using device's scan. */
        if (cfg->mod_params->disable_hw_scan) {
                if (cfg->mod_params->debug & IWL_DL_INFO)
                        dev_printk(KERN_DEBUG, &(pdev->dev),
                                   "Disabling hw_scan\n");
                iwl4965_hw_ops.hw_scan = NULL;
        }

        hw = iwl_alloc_all(cfg, &iwl4965_hw_ops);
        if (!hw) {
                err = -ENOMEM;
                goto out;
        }
        priv = hw->priv;
        /* At this point both hw and priv are allocated. */

        SET_IEEE80211_DEV(hw, &pdev->dev);

        IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
        priv->cfg = cfg;
        priv->pci_dev = pdev;

#ifdef CONFIG_IWLWIFI_DEBUG
        priv->debug_level = priv->cfg->mod_params->debug;
        atomic_set(&priv->restrict_refcnt, 0);
#endif

        /**************************
         * 2. Initializing PCI bus
         **************************/
        if (pci_enable_device(pdev)) {
                err = -ENODEV;
                goto out_ieee80211_free_hw;
        }

        pci_set_master(pdev);

        err = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
        if (!err)
                err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
        if (err) {
                err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
                if (!err)
                        err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
                /* both attempts failed: */
                if (err) {
                        printk(KERN_WARNING "%s: No suitable DMA available.\n",
                                DRV_NAME);
                        goto out_pci_disable_device;
                }
        }

        err = pci_request_regions(pdev, DRV_NAME);
        if (err)
                goto out_pci_disable_device;

        pci_set_drvdata(pdev, priv);

        /* We disable the RETRY_TIMEOUT register (0x41) to keep
         * PCI Tx retries from interfering with C3 CPU state */
        pci_write_config_byte(pdev, 0x41, 0x00);

        /***********************
         * 3. Read REV register
         ***********************/
        priv->hw_base = pci_iomap(pdev, 0, 0);
        if (!priv->hw_base) {
                err = -ENODEV;
                goto out_pci_release_regions;
        }

        IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
                (unsigned long long) pci_resource_len(pdev, 0));
        IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);

        iwl_hw_detect(priv);
        printk(KERN_INFO DRV_NAME
                ": Detected Intel Wireless WiFi Link %s REV=0x%X\n",
                priv->cfg->name, priv->hw_rev);

        /* amp init */
        err = priv->cfg->ops->lib->apm_ops.init(priv);
        if (err < 0) {
                IWL_DEBUG_INFO("Failed to init APMG\n");
                goto out_iounmap;
        }
        /*****************
         * 4. Read EEPROM
         *****************/
        /* Read the EEPROM */
        err = iwl_eeprom_init(priv);
        if (err) {
                IWL_ERROR("Unable to init EEPROM\n");
                goto out_iounmap;
        }
        err = iwl_eeprom_check_version(priv);
        if (err)
                goto out_iounmap;

        /* extract MAC Address */
        iwl_eeprom_get_mac(priv, priv->mac_addr);
        IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
        SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);

        /************************
         * 5. Setup HW constants
         ************************/
        if (iwl_set_hw_params(priv)) {
                IWL_ERROR("failed to set hw parameters\n");
                goto out_free_eeprom;
        }

        /*******************
         * 6. Setup priv
         *******************/

        err = iwl_init_drv(priv);
        if (err)
                goto out_free_eeprom;
        /* At this point both hw and priv are initialized. */

        /**********************************
         * 7. Initialize module parameters
         **********************************/

        /* Disable radio (SW RF KILL) via parameter when loading driver */
        if (priv->cfg->mod_params->disable) {
                set_bit(STATUS_RF_KILL_SW, &priv->status);
                IWL_DEBUG_INFO("Radio disabled.\n");
        }

        /********************
         * 8. Setup services
         ********************/
        spin_lock_irqsave(&priv->lock, flags);
        iwl4965_disable_interrupts(priv);
        spin_unlock_irqrestore(&priv->lock, flags);

        err = sysfs_create_group(&pdev->dev.kobj, &iwl4965_attribute_group);
        if (err) {
                IWL_ERROR("failed to create sysfs device attributes\n");
                goto out_uninit_drv;
        }


        iwl_setup_deferred_work(priv);
        iwl_setup_rx_handlers(priv);

        /********************
         * 9. Conclude
         ********************/
        pci_save_state(pdev);
        pci_disable_device(pdev);

        /**********************************
         * 10. Setup and register mac80211
         **********************************/

        err = iwl_setup_mac(priv);
        if (err)
                goto out_remove_sysfs;

        err = iwl_dbgfs_register(priv, DRV_NAME);
        if (err)
                IWL_ERROR("failed to create debugfs files\n");

        err = iwl_rfkill_init(priv);
        if (err)
                IWL_ERROR("Unable to initialize RFKILL system. "
                                  "Ignoring error: %d\n", err);
        iwl_power_initialize(priv);
        return 0;

 out_remove_sysfs:
        sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
 out_uninit_drv:
        iwl_uninit_drv(priv);
 out_free_eeprom:
        iwl_eeprom_free(priv);
 out_iounmap:
        pci_iounmap(pdev, priv->hw_base);
 out_pci_release_regions:
        pci_release_regions(pdev);
        pci_set_drvdata(pdev, NULL);
 out_pci_disable_device:
        pci_disable_device(pdev);
 out_ieee80211_free_hw:
        ieee80211_free_hw(priv->hw);
 out:
        return err;
}

static void __devexit iwl4965_pci_remove(struct pci_dev *pdev)
{
        struct iwl_priv *priv = pci_get_drvdata(pdev);
        unsigned long flags;

        if (!priv)
                return;

        IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");

        iwl_dbgfs_unregister(priv);
        sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);

        if (priv->mac80211_registered) {
                ieee80211_unregister_hw(priv->hw);
                priv->mac80211_registered = 0;
        }

        set_bit(STATUS_EXIT_PENDING, &priv->status);

        iwl4965_down(priv);

        /* make sure we flush any pending irq or
         * tasklet for the driver
         */
        spin_lock_irqsave(&priv->lock, flags);
        iwl4965_disable_interrupts(priv);
        spin_unlock_irqrestore(&priv->lock, flags);

        iwl_synchronize_irq(priv);

        iwl_rfkill_unregister(priv);
        iwl4965_dealloc_ucode_pci(priv);

        if (priv->rxq.bd)
                iwl_rx_queue_free(priv, &priv->rxq);
        iwl_hw_txq_ctx_free(priv);

        iwl_clear_stations_table(priv);
        iwl_eeprom_free(priv);


        /*netif_stop_queue(dev); */
        flush_workqueue(priv->workqueue);

        /* ieee80211_unregister_hw calls iwl4965_mac_stop, which flushes
         * priv->workqueue... so we can't take down the workqueue
         * until now... */
        destroy_workqueue(priv->workqueue);
        priv->workqueue = NULL;

        pci_iounmap(pdev, priv->hw_base);
        pci_release_regions(pdev);
        pci_disable_device(pdev);
        pci_set_drvdata(pdev, NULL);

        iwl_uninit_drv(priv);

        if (priv->ibss_beacon)
                dev_kfree_skb(priv->ibss_beacon);

        ieee80211_free_hw(priv->hw);
}

#ifdef CONFIG_PM

static int iwl4965_pci_suspend(struct pci_dev *pdev, pm_message_t state)
{
        struct iwl_priv *priv = pci_get_drvdata(pdev);

        if (priv->is_open) {
                set_bit(STATUS_IN_SUSPEND, &priv->status);
                iwl4965_mac_stop(priv->hw);
                priv->is_open = 1;
        }

        pci_set_power_state(pdev, PCI_D3hot);

        return 0;
}

static int iwl4965_pci_resume(struct pci_dev *pdev)
{
        struct iwl_priv *priv = pci_get_drvdata(pdev);

        pci_set_power_state(pdev, PCI_D0);

        if (priv->is_open)
                iwl4965_mac_start(priv->hw);

        clear_bit(STATUS_IN_SUSPEND, &priv->status);
        return 0;
}

#endif /* CONFIG_PM */

/*****************************************************************************
 *
 * driver and module entry point
 *
 *****************************************************************************/

/* Hardware specific file defines the PCI IDs table for that hardware module */
static struct pci_device_id iwl_hw_card_ids[] = {
#ifdef CONFIG_IWL4965
        {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
        {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
#endif /* CONFIG_IWL4965 */
#ifdef CONFIG_IWL5000
        {IWL_PCI_DEVICE(0x4232, 0x1205, iwl5100_bg_cfg)},
        {IWL_PCI_DEVICE(0x4232, 0x1305, iwl5100_bg_cfg)},
        {IWL_PCI_DEVICE(0x4232, 0x1206, iwl5100_abg_cfg)},
        {IWL_PCI_DEVICE(0x4232, 0x1306, iwl5100_abg_cfg)},
        {IWL_PCI_DEVICE(0x4232, 0x1326, iwl5100_abg_cfg)},
        {IWL_PCI_DEVICE(0x4237, 0x1216, iwl5100_abg_cfg)},
        {IWL_PCI_DEVICE(0x4232, PCI_ANY_ID, iwl5100_agn_cfg)},
        {IWL_PCI_DEVICE(0x4235, PCI_ANY_ID, iwl5300_agn_cfg)},
        {IWL_PCI_DEVICE(0x4236, PCI_ANY_ID, iwl5300_agn_cfg)},
        {IWL_PCI_DEVICE(0x4237, PCI_ANY_ID, iwl5100_agn_cfg)},
        {IWL_PCI_DEVICE(0x423A, PCI_ANY_ID, iwl5350_agn_cfg)},
#endif /* CONFIG_IWL5000 */
        {0}
};
MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);

static struct pci_driver iwl_driver = {
        .name = DRV_NAME,
        .id_table = iwl_hw_card_ids,
        .probe = iwl4965_pci_probe,
        .remove = __devexit_p(iwl4965_pci_remove),
#ifdef CONFIG_PM
        .suspend = iwl4965_pci_suspend,
        .resume = iwl4965_pci_resume,
#endif
};

static int __init iwl4965_init(void)
{

        int ret;
        printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
        printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");

        ret = iwlagn_rate_control_register();
        if (ret) {
                IWL_ERROR("Unable to register rate control algorithm: %d\n", ret);
                return ret;
        }

        ret = pci_register_driver(&iwl_driver);
        if (ret) {
                IWL_ERROR("Unable to initialize PCI module\n");
                goto error_register;
        }

        return ret;

error_register:
        iwlagn_rate_control_unregister();
        return ret;
}

static void __exit iwl4965_exit(void)
{
        pci_unregister_driver(&iwl_driver);
        iwlagn_rate_control_unregister();
}

module_exit(iwl4965_exit);
module_init(iwl4965_init);