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main.c

/**
  * This file contains the major functions in WLAN
  * driver. It includes init, exit, open, close and main
  * thread etc..
  */

#include <linux/moduleparam.h>
#include <linux/delay.h>
#include <linux/freezer.h>
#include <linux/etherdevice.h>
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <linux/kthread.h>

#include <net/iw_handler.h>
#include <net/ieee80211.h>

#include "host.h"
#include "decl.h"
#include "dev.h"
#include "wext.h"
#include "debugfs.h"
#include "assoc.h"
#include "join.h"

#define DRIVER_RELEASE_VERSION "323.p0"
const char libertas_driver_version[] = "COMM-USB8388-" DRIVER_RELEASE_VERSION
#ifdef  DEBUG
    "-dbg"
#endif
    "";


/* Module parameters */
unsigned int libertas_debug = 0;
module_param(libertas_debug, int, 0644);
EXPORT_SYMBOL_GPL(libertas_debug);


#define WLAN_TX_PWR_DEFAULT         20    /*100mW */
#define WLAN_TX_PWR_US_DEFAULT            20    /*100mW */
#define WLAN_TX_PWR_JP_DEFAULT            16    /*50mW */
#define WLAN_TX_PWR_FR_DEFAULT            20    /*100mW */
#define WLAN_TX_PWR_EMEA_DEFAULT    20    /*100mW */

/* Format { channel, frequency (MHz), maxtxpower } */
/* band: 'B/G', region: USA FCC/Canada IC */
static struct chan_freq_power channel_freq_power_US_BG[] = {
      {1, 2412, WLAN_TX_PWR_US_DEFAULT},
      {2, 2417, WLAN_TX_PWR_US_DEFAULT},
      {3, 2422, WLAN_TX_PWR_US_DEFAULT},
      {4, 2427, WLAN_TX_PWR_US_DEFAULT},
      {5, 2432, WLAN_TX_PWR_US_DEFAULT},
      {6, 2437, WLAN_TX_PWR_US_DEFAULT},
      {7, 2442, WLAN_TX_PWR_US_DEFAULT},
      {8, 2447, WLAN_TX_PWR_US_DEFAULT},
      {9, 2452, WLAN_TX_PWR_US_DEFAULT},
      {10, 2457, WLAN_TX_PWR_US_DEFAULT},
      {11, 2462, WLAN_TX_PWR_US_DEFAULT}
};

/* band: 'B/G', region: Europe ETSI */
static struct chan_freq_power channel_freq_power_EU_BG[] = {
      {1, 2412, WLAN_TX_PWR_EMEA_DEFAULT},
      {2, 2417, WLAN_TX_PWR_EMEA_DEFAULT},
      {3, 2422, WLAN_TX_PWR_EMEA_DEFAULT},
      {4, 2427, WLAN_TX_PWR_EMEA_DEFAULT},
      {5, 2432, WLAN_TX_PWR_EMEA_DEFAULT},
      {6, 2437, WLAN_TX_PWR_EMEA_DEFAULT},
      {7, 2442, WLAN_TX_PWR_EMEA_DEFAULT},
      {8, 2447, WLAN_TX_PWR_EMEA_DEFAULT},
      {9, 2452, WLAN_TX_PWR_EMEA_DEFAULT},
      {10, 2457, WLAN_TX_PWR_EMEA_DEFAULT},
      {11, 2462, WLAN_TX_PWR_EMEA_DEFAULT},
      {12, 2467, WLAN_TX_PWR_EMEA_DEFAULT},
      {13, 2472, WLAN_TX_PWR_EMEA_DEFAULT}
};

/* band: 'B/G', region: Spain */
static struct chan_freq_power channel_freq_power_SPN_BG[] = {
      {10, 2457, WLAN_TX_PWR_DEFAULT},
      {11, 2462, WLAN_TX_PWR_DEFAULT}
};

/* band: 'B/G', region: France */
static struct chan_freq_power channel_freq_power_FR_BG[] = {
      {10, 2457, WLAN_TX_PWR_FR_DEFAULT},
      {11, 2462, WLAN_TX_PWR_FR_DEFAULT},
      {12, 2467, WLAN_TX_PWR_FR_DEFAULT},
      {13, 2472, WLAN_TX_PWR_FR_DEFAULT}
};

/* band: 'B/G', region: Japan */
static struct chan_freq_power channel_freq_power_JPN_BG[] = {
      {1, 2412, WLAN_TX_PWR_JP_DEFAULT},
      {2, 2417, WLAN_TX_PWR_JP_DEFAULT},
      {3, 2422, WLAN_TX_PWR_JP_DEFAULT},
      {4, 2427, WLAN_TX_PWR_JP_DEFAULT},
      {5, 2432, WLAN_TX_PWR_JP_DEFAULT},
      {6, 2437, WLAN_TX_PWR_JP_DEFAULT},
      {7, 2442, WLAN_TX_PWR_JP_DEFAULT},
      {8, 2447, WLAN_TX_PWR_JP_DEFAULT},
      {9, 2452, WLAN_TX_PWR_JP_DEFAULT},
      {10, 2457, WLAN_TX_PWR_JP_DEFAULT},
      {11, 2462, WLAN_TX_PWR_JP_DEFAULT},
      {12, 2467, WLAN_TX_PWR_JP_DEFAULT},
      {13, 2472, WLAN_TX_PWR_JP_DEFAULT},
      {14, 2484, WLAN_TX_PWR_JP_DEFAULT}
};

/**
 * the structure for channel, frequency and power
 */
00114 struct region_cfp_table {
      u8 region;
      struct chan_freq_power *cfp_BG;
      int cfp_no_BG;
};

/**
 * the structure for the mapping between region and CFP
 */
static struct region_cfp_table region_cfp_table[] = {
      {0x10,                  /*US FCC */
       channel_freq_power_US_BG,
       ARRAY_SIZE(channel_freq_power_US_BG),
       }
      ,
      {0x20,                  /*CANADA IC */
       channel_freq_power_US_BG,
       ARRAY_SIZE(channel_freq_power_US_BG),
       }
      ,
      {0x30, /*EU*/ channel_freq_power_EU_BG,
       ARRAY_SIZE(channel_freq_power_EU_BG),
       }
      ,
      {0x31, /*SPAIN*/ channel_freq_power_SPN_BG,
       ARRAY_SIZE(channel_freq_power_SPN_BG),
       }
      ,
      {0x32, /*FRANCE*/ channel_freq_power_FR_BG,
       ARRAY_SIZE(channel_freq_power_FR_BG),
       }
      ,
      {0x40, /*JAPAN*/ channel_freq_power_JPN_BG,
       ARRAY_SIZE(channel_freq_power_JPN_BG),
       }
      ,
/*Add new region here */
};

/**
 * the table to keep region code
 */
u16 libertas_region_code_to_index[MRVDRV_MAX_REGION_CODE] =
    { 0x10, 0x20, 0x30, 0x31, 0x32, 0x40 };

/**
 * 802.11b/g supported bitrates (in 500Kb/s units)
 */
u8 libertas_bg_rates[MAX_RATES] =
    { 0x02, 0x04, 0x0b, 0x16, 0x0c, 0x12, 0x18, 0x24, 0x30, 0x48, 0x60, 0x6c,
0x00, 0x00 };

/**
 * FW rate table.  FW refers to rates by their index in this table, not by the
 * rate value itself.  Values of 0x00 are
 * reserved positions.
 */
static u8 fw_data_rates[MAX_RATES] =
    { 0x02, 0x04, 0x0B, 0x16, 0x00, 0x0C, 0x12,
      0x18, 0x24, 0x30, 0x48, 0x60, 0x6C, 0x00
};

/**
 *  @brief use index to get the data rate
 *
 *  @param idx                The index of data rate
 *  @return                   data rate or 0
 */
u32 libertas_fw_index_to_data_rate(u8 idx)
{
      if (idx >= sizeof(fw_data_rates))
            idx = 0;
      return fw_data_rates[idx];
}

/**
 *  @brief use rate to get the index
 *
 *  @param rate                 data rate
 *  @return                   index or 0
 */
u8 libertas_data_rate_to_fw_index(u32 rate)
{
      u8 i;

      if (!rate)
            return 0;

      for (i = 0; i < sizeof(fw_data_rates); i++) {
            if (rate == fw_data_rates[i])
                  return i;
      }
      return 0;
}

/**
 * Attributes exported through sysfs
 */

/**
 * @brief Get function for sysfs attribute anycast_mask
 */
static ssize_t libertas_anycast_get(struct device * dev,
            struct device_attribute *attr, char * buf)
{
      struct cmd_ds_mesh_access mesh_access;

      memset(&mesh_access, 0, sizeof(mesh_access));
      libertas_prepare_and_send_command(to_net_dev(dev)->priv,
                  CMD_MESH_ACCESS,
                  CMD_ACT_MESH_GET_ANYCAST,
                  CMD_OPTION_WAITFORRSP, 0, (void *)&mesh_access);

      return snprintf(buf, 12, "0x%X\n", le32_to_cpu(mesh_access.data[0]));
}

/**
 * @brief Set function for sysfs attribute anycast_mask
 */
static ssize_t libertas_anycast_set(struct device * dev,
            struct device_attribute *attr, const char * buf, size_t count)
{
      struct cmd_ds_mesh_access mesh_access;
      uint32_t datum;

      memset(&mesh_access, 0, sizeof(mesh_access));
      sscanf(buf, "%x", &datum);
      mesh_access.data[0] = cpu_to_le32(datum);

      libertas_prepare_and_send_command((to_net_dev(dev))->priv,
                  CMD_MESH_ACCESS,
                  CMD_ACT_MESH_SET_ANYCAST,
                  CMD_OPTION_WAITFORRSP, 0, (void *)&mesh_access);
      return strlen(buf);
}

int libertas_add_rtap(wlan_private *priv);
void libertas_remove_rtap(wlan_private *priv);

/**
 * Get function for sysfs attribute rtap
 */
static ssize_t libertas_rtap_get(struct device * dev,
            struct device_attribute *attr, char * buf)
{
      wlan_private *priv = (wlan_private *) (to_net_dev(dev))->priv;
      wlan_adapter *adapter = priv->adapter;
      return snprintf(buf, 5, "0x%X\n", adapter->monitormode);
}

/**
 *  Set function for sysfs attribute rtap
 */
static ssize_t libertas_rtap_set(struct device * dev,
            struct device_attribute *attr, const char * buf, size_t count)
{
      int monitor_mode;
      wlan_private *priv = (wlan_private *) (to_net_dev(dev))->priv;
      wlan_adapter *adapter = priv->adapter;

      sscanf(buf, "%x", &monitor_mode);
      if (monitor_mode != WLAN_MONITOR_OFF) {
            if(adapter->monitormode == monitor_mode)
                  return strlen(buf);
            if (adapter->monitormode == WLAN_MONITOR_OFF) {
                  if (adapter->mode == IW_MODE_INFRA)
                        libertas_send_deauthentication(priv);
                  else if (adapter->mode == IW_MODE_ADHOC)
                        libertas_stop_adhoc_network(priv);
                  libertas_add_rtap(priv);
            }
            adapter->monitormode = monitor_mode;
      }

      else {
            if(adapter->monitormode == WLAN_MONITOR_OFF)
                  return strlen(buf);
            adapter->monitormode = WLAN_MONITOR_OFF;
            libertas_remove_rtap(priv);
            netif_wake_queue(priv->dev);
            netif_wake_queue(priv->mesh_dev);
      }

      libertas_prepare_and_send_command(priv,
                  CMD_802_11_MONITOR_MODE, CMD_ACT_SET,
                  CMD_OPTION_WAITFORRSP, 0, &adapter->monitormode);
      return strlen(buf);
}

/**
 * libertas_rtap attribute to be exported per mshX interface
 * through sysfs (/sys/class/net/mshX/libertas-rtap)
 */
static DEVICE_ATTR(libertas_rtap, 0644, libertas_rtap_get,
            libertas_rtap_set );

/**
 * anycast_mask attribute to be exported per mshX interface
 * through sysfs (/sys/class/net/mshX/anycast_mask)
 */
static DEVICE_ATTR(anycast_mask, 0644, libertas_anycast_get, libertas_anycast_set);

static ssize_t libertas_autostart_enabled_get(struct device * dev,
            struct device_attribute *attr, char * buf)
{
      struct cmd_ds_mesh_access mesh_access;

      memset(&mesh_access, 0, sizeof(mesh_access));
      libertas_prepare_and_send_command(to_net_dev(dev)->priv,
                  CMD_MESH_ACCESS,
                  CMD_ACT_MESH_GET_AUTOSTART_ENABLED,
                  CMD_OPTION_WAITFORRSP, 0, (void *)&mesh_access);

      return sprintf(buf, "%d\n", le32_to_cpu(mesh_access.data[0]));
}

static ssize_t libertas_autostart_enabled_set(struct device * dev,
            struct device_attribute *attr, const char * buf, size_t count)
{
      struct cmd_ds_mesh_access mesh_access;
      uint32_t datum;
      wlan_private * priv = (to_net_dev(dev))->priv;
      int ret;

      memset(&mesh_access, 0, sizeof(mesh_access));
      sscanf(buf, "%d", &datum);
      mesh_access.data[0] = cpu_to_le32(datum);

      ret = libertas_prepare_and_send_command(priv,
                  CMD_MESH_ACCESS,
                  CMD_ACT_MESH_SET_AUTOSTART_ENABLED,
                  CMD_OPTION_WAITFORRSP, 0, (void *)&mesh_access);
      if (ret == 0)
            priv->mesh_autostart_enabled = datum ? 1 : 0;

      return strlen(buf);
}

static DEVICE_ATTR(autostart_enabled, 0644,
            libertas_autostart_enabled_get, libertas_autostart_enabled_set);

static struct attribute *libertas_mesh_sysfs_entries[] = {
      &dev_attr_anycast_mask.attr,
      &dev_attr_autostart_enabled.attr,
      NULL,
};

static struct attribute_group libertas_mesh_attr_group = {
      .attrs = libertas_mesh_sysfs_entries,
};

/**
 *  @brief Check if the device can be open and wait if necessary.
 *
 *  @param dev     A pointer to net_device structure
 *  @return          0
 *
 * For USB adapter, on some systems the device open handler will be
 * called before FW ready. Use the following flag check and wait
 * function to work around the issue.
 *
 */
static int pre_open_check(struct net_device *dev)
{
      wlan_private *priv = (wlan_private *) dev->priv;
      wlan_adapter *adapter = priv->adapter;
      int i = 0;

      while (!adapter->fw_ready && i < 20) {
            i++;
            msleep_interruptible(100);
      }
      if (!adapter->fw_ready) {
            lbs_pr_err("firmware not ready\n");
            return -1;
      }

      return 0;
}

/**
 *  @brief This function opens the device
 *
 *  @param dev     A pointer to net_device structure
 *  @return          0
 */
static int libertas_dev_open(struct net_device *dev)
{
      wlan_private *priv = (wlan_private *) dev->priv;
      wlan_adapter *adapter = priv->adapter;

      lbs_deb_enter(LBS_DEB_NET);

      priv->open = 1;

      if (adapter->connect_status == LIBERTAS_CONNECTED) {
            netif_carrier_on(priv->dev);
            if (priv->mesh_dev)
                  netif_carrier_on(priv->mesh_dev);
      } else {
            netif_carrier_off(priv->dev);
            if (priv->mesh_dev)
                  netif_carrier_off(priv->mesh_dev);
      }

      lbs_deb_leave(LBS_DEB_NET);
      return 0;
}
/**
 *  @brief This function opens the mshX interface
 *
 *  @param dev     A pointer to net_device structure
 *  @return          0
 */
static int libertas_mesh_open(struct net_device *dev)
{
      wlan_private *priv = (wlan_private *) dev->priv ;

      if (pre_open_check(dev) == -1)
            return -1;
      priv->mesh_open = 1 ;
      netif_wake_queue(priv->mesh_dev);
      if (priv->infra_open == 0)
            return libertas_dev_open(priv->dev) ;
      return 0;
}

/**
 *  @brief This function opens the ethX interface
 *
 *  @param dev     A pointer to net_device structure
 *  @return          0
 */
static int libertas_open(struct net_device *dev)
{
      wlan_private *priv = (wlan_private *) dev->priv ;

      if(pre_open_check(dev) == -1)
            return -1;
      priv->infra_open = 1 ;
      netif_wake_queue(priv->dev);
      if (priv->open == 0)
            return libertas_dev_open(priv->dev) ;
      return 0;
}

static int libertas_dev_close(struct net_device *dev)
{
      wlan_private *priv = dev->priv;

      lbs_deb_enter(LBS_DEB_NET);

      netif_carrier_off(priv->dev);
      priv->open = 0;

      lbs_deb_leave(LBS_DEB_NET);
      return 0;
}

/**
 *  @brief This function closes the mshX interface
 *
 *  @param dev     A pointer to net_device structure
 *  @return          0
 */
static int libertas_mesh_close(struct net_device *dev)
{
      wlan_private *priv = (wlan_private *) (dev->priv);

      priv->mesh_open = 0;
      netif_stop_queue(priv->mesh_dev);
      if (priv->infra_open == 0)
            return libertas_dev_close(dev);
      else
            return 0;
}

/**
 *  @brief This function closes the ethX interface
 *
 *  @param dev     A pointer to net_device structure
 *  @return          0
 */
static int libertas_close(struct net_device *dev)
{
      wlan_private *priv = (wlan_private *) dev->priv;

      netif_stop_queue(dev);
      priv->infra_open = 0;
      if (priv->mesh_open == 0)
            return libertas_dev_close(dev);
      else
            return 0;
}


static int libertas_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
      int ret = 0;
      wlan_private *priv = dev->priv;

      lbs_deb_enter(LBS_DEB_NET);

      if (priv->dnld_sent || priv->adapter->TxLockFlag) {
            priv->stats.tx_dropped++;
            goto done;
      }

      netif_stop_queue(priv->dev);
      if (priv->mesh_dev)
            netif_stop_queue(priv->mesh_dev);

      if (libertas_process_tx(priv, skb) == 0)
            dev->trans_start = jiffies;
done:
      lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
      return ret;
}

/**
 * @brief Mark mesh packets and handover them to libertas_hard_start_xmit
 *
 */
static int libertas_mesh_pre_start_xmit(struct sk_buff *skb,
            struct net_device *dev)
{
      wlan_private *priv = dev->priv;
      int ret;

      lbs_deb_enter(LBS_DEB_MESH);
      if(priv->adapter->monitormode != WLAN_MONITOR_OFF) {
            netif_stop_queue(dev);
            return -EOPNOTSUPP;
      }

      SET_MESH_FRAME(skb);

      ret = libertas_hard_start_xmit(skb, priv->dev);
      lbs_deb_leave_args(LBS_DEB_MESH, "ret %d", ret);
      return ret;
}

/**
 * @brief Mark non-mesh packets and handover them to libertas_hard_start_xmit
 *
 */
static int libertas_pre_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
      wlan_private *priv = dev->priv;
      int ret;

      lbs_deb_enter(LBS_DEB_NET);

      if(priv->adapter->monitormode != WLAN_MONITOR_OFF) {
            netif_stop_queue(dev);
            return -EOPNOTSUPP;
      }

      UNSET_MESH_FRAME(skb);

      ret = libertas_hard_start_xmit(skb, dev);
      lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
      return ret;
}

static void libertas_tx_timeout(struct net_device *dev)
{
      wlan_private *priv = (wlan_private *) dev->priv;

      lbs_deb_enter(LBS_DEB_TX);

      lbs_pr_err("tx watch dog timeout\n");

      priv->dnld_sent = DNLD_RES_RECEIVED;
      dev->trans_start = jiffies;

      if (priv->adapter->currenttxskb) {
            if (priv->adapter->monitormode != WLAN_MONITOR_OFF) {
                  /* If we are here, we have not received feedback from
                     the previous packet.  Assume TX_FAIL and move on. */
                  priv->adapter->eventcause = 0x01000000;
                  libertas_send_tx_feedback(priv);
            } else
                  wake_up_interruptible(&priv->waitq);
      } else if (priv->adapter->connect_status == LIBERTAS_CONNECTED) {
            netif_wake_queue(priv->dev);
            if (priv->mesh_dev)
                  netif_wake_queue(priv->mesh_dev);
      }

      lbs_deb_leave(LBS_DEB_TX);
}

/**
 *  @brief This function returns the network statistics
 *
 *  @param dev     A pointer to wlan_private structure
 *  @return          A pointer to net_device_stats structure
 */
static struct net_device_stats *libertas_get_stats(struct net_device *dev)
{
      wlan_private *priv = (wlan_private *) dev->priv;

      return &priv->stats;
}

static int libertas_set_mac_address(struct net_device *dev, void *addr)
{
      int ret = 0;
      wlan_private *priv = (wlan_private *) dev->priv;
      wlan_adapter *adapter = priv->adapter;
      struct sockaddr *phwaddr = addr;

      lbs_deb_enter(LBS_DEB_NET);

      /* In case it was called from the mesh device */
      dev = priv->dev ;

      memset(adapter->current_addr, 0, ETH_ALEN);

      /* dev->dev_addr is 8 bytes */
      lbs_deb_hex(LBS_DEB_NET, "dev->dev_addr", dev->dev_addr, ETH_ALEN);

      lbs_deb_hex(LBS_DEB_NET, "addr", phwaddr->sa_data, ETH_ALEN);
      memcpy(adapter->current_addr, phwaddr->sa_data, ETH_ALEN);

      ret = libertas_prepare_and_send_command(priv, CMD_802_11_MAC_ADDRESS,
                            CMD_ACT_SET,
                            CMD_OPTION_WAITFORRSP, 0, NULL);

      if (ret) {
            lbs_deb_net("set MAC address failed\n");
            ret = -1;
            goto done;
      }

      lbs_deb_hex(LBS_DEB_NET, "adapter->macaddr", adapter->current_addr, ETH_ALEN);
      memcpy(dev->dev_addr, adapter->current_addr, ETH_ALEN);
      if (priv->mesh_dev)
            memcpy(priv->mesh_dev->dev_addr, adapter->current_addr, ETH_ALEN);

done:
      lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
      return ret;
}

static int libertas_copy_multicast_address(wlan_adapter * adapter,
                             struct net_device *dev)
{
      int i = 0;
      struct dev_mc_list *mcptr = dev->mc_list;

      for (i = 0; i < dev->mc_count; i++) {
            memcpy(&adapter->multicastlist[i], mcptr->dmi_addr, ETH_ALEN);
            mcptr = mcptr->next;
      }

      return i;

}

static void libertas_set_multicast_list(struct net_device *dev)
{
      wlan_private *priv = dev->priv;
      wlan_adapter *adapter = priv->adapter;
      int oldpacketfilter;
      DECLARE_MAC_BUF(mac);

      lbs_deb_enter(LBS_DEB_NET);

      oldpacketfilter = adapter->currentpacketfilter;

      if (dev->flags & IFF_PROMISC) {
            lbs_deb_net("enable promiscuous mode\n");
            adapter->currentpacketfilter |=
                CMD_ACT_MAC_PROMISCUOUS_ENABLE;
            adapter->currentpacketfilter &=
                ~(CMD_ACT_MAC_ALL_MULTICAST_ENABLE |
                  CMD_ACT_MAC_MULTICAST_ENABLE);
      } else {
            /* Multicast */
            adapter->currentpacketfilter &=
                ~CMD_ACT_MAC_PROMISCUOUS_ENABLE;

            if (dev->flags & IFF_ALLMULTI || dev->mc_count >
                MRVDRV_MAX_MULTICAST_LIST_SIZE) {
                  lbs_deb_net( "enabling all multicast\n");
                  adapter->currentpacketfilter |=
                      CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
                  adapter->currentpacketfilter &=
                      ~CMD_ACT_MAC_MULTICAST_ENABLE;
            } else {
                  adapter->currentpacketfilter &=
                      ~CMD_ACT_MAC_ALL_MULTICAST_ENABLE;

                  if (!dev->mc_count) {
                        lbs_deb_net("no multicast addresses, "
                               "disabling multicast\n");
                        adapter->currentpacketfilter &=
                            ~CMD_ACT_MAC_MULTICAST_ENABLE;
                  } else {
                        int i;

                        adapter->currentpacketfilter |=
                            CMD_ACT_MAC_MULTICAST_ENABLE;

                        adapter->nr_of_multicastmacaddr =
                            libertas_copy_multicast_address(adapter, dev);

                        lbs_deb_net("multicast addresses: %d\n",
                               dev->mc_count);

                        for (i = 0; i < dev->mc_count; i++) {
                              lbs_deb_net("Multicast address %d:%s\n",
                                     i, print_mac(mac,
                                     adapter->multicastlist[i]));
                        }
                        /* send multicast addresses to firmware */
                        libertas_prepare_and_send_command(priv,
                                          CMD_MAC_MULTICAST_ADR,
                                          CMD_ACT_SET, 0, 0,
                                          NULL);
                  }
            }
      }

      if (adapter->currentpacketfilter != oldpacketfilter) {
            libertas_set_mac_packet_filter(priv);
      }

      lbs_deb_leave(LBS_DEB_NET);
}

/**
 *  @brief This function handles the major jobs in the WLAN driver.
 *  It handles all events generated by firmware, RX data received
 *  from firmware and TX data sent from kernel.
 *
 *  @param data    A pointer to wlan_thread structure
 *  @return          0
 */
static int libertas_thread(void *data)
{
      struct net_device *dev = data;
      wlan_private *priv = dev->priv;
      wlan_adapter *adapter = priv->adapter;
      wait_queue_t wait;
      u8 ireg = 0;

      lbs_deb_enter(LBS_DEB_THREAD);

      init_waitqueue_entry(&wait, current);

      set_freezable();
      for (;;) {
            lbs_deb_thread( "main-thread 111: intcounter=%d "
                   "currenttxskb=%p dnld_sent=%d\n",
                   adapter->intcounter,
                   adapter->currenttxskb, priv->dnld_sent);

            add_wait_queue(&priv->waitq, &wait);
            set_current_state(TASK_INTERRUPTIBLE);
            spin_lock_irq(&adapter->driver_lock);
            if ((adapter->psstate == PS_STATE_SLEEP) ||
                (!adapter->intcounter
                 && (priv->dnld_sent || adapter->cur_cmd ||
                   list_empty(&adapter->cmdpendingq)))) {
                  lbs_deb_thread(
                         "main-thread sleeping... Conn=%d IntC=%d PS_mode=%d PS_State=%d\n",
                         adapter->connect_status, adapter->intcounter,
                         adapter->psmode, adapter->psstate);
                  spin_unlock_irq(&adapter->driver_lock);
                  schedule();
            } else
                  spin_unlock_irq(&adapter->driver_lock);

            lbs_deb_thread(
                   "main-thread 222 (waking up): intcounter=%d currenttxskb=%p "
                   "dnld_sent=%d\n", adapter->intcounter,
                   adapter->currenttxskb, priv->dnld_sent);

            set_current_state(TASK_RUNNING);
            remove_wait_queue(&priv->waitq, &wait);
            try_to_freeze();

            lbs_deb_thread("main-thread 333: intcounter=%d currenttxskb=%p "
                   "dnld_sent=%d\n",
                   adapter->intcounter,
                   adapter->currenttxskb, priv->dnld_sent);

            if (kthread_should_stop()
                || adapter->surpriseremoved) {
                  lbs_deb_thread(
                         "main-thread: break from main thread: surpriseremoved=0x%x\n",
                         adapter->surpriseremoved);
                  break;
            }


            spin_lock_irq(&adapter->driver_lock);
            if (adapter->intcounter) {
                  u8 int_status;
                  adapter->intcounter = 0;
                  int_status = priv->hw_get_int_status(priv, &ireg);

                  if (int_status) {
                        lbs_deb_thread(
                               "main-thread: reading HOST_INT_STATUS_REG failed\n");
                        spin_unlock_irq(&adapter->driver_lock);
                        continue;
                  }
                  adapter->hisregcpy |= ireg;
            }

            lbs_deb_thread("main-thread 444: intcounter=%d currenttxskb=%p "
                   "dnld_sent=%d\n",
                   adapter->intcounter,
                   adapter->currenttxskb, priv->dnld_sent);

            /* command response? */
            if (adapter->hisregcpy & MRVDRV_CMD_UPLD_RDY) {
                  lbs_deb_thread("main-thread: cmd response ready\n");

                  adapter->hisregcpy &= ~MRVDRV_CMD_UPLD_RDY;
                  spin_unlock_irq(&adapter->driver_lock);
                  libertas_process_rx_command(priv);
                  spin_lock_irq(&adapter->driver_lock);
            }

            /* Any Card Event */
            if (adapter->hisregcpy & MRVDRV_CARDEVENT) {
                  lbs_deb_thread("main-thread: Card Event Activity\n");

                  adapter->hisregcpy &= ~MRVDRV_CARDEVENT;

                  if (priv->hw_read_event_cause(priv)) {
                        lbs_pr_alert(
                               "main-thread: hw_read_event_cause failed\n");
                        spin_unlock_irq(&adapter->driver_lock);
                        continue;
                  }
                  spin_unlock_irq(&adapter->driver_lock);
                  libertas_process_event(priv);
            } else
                  spin_unlock_irq(&adapter->driver_lock);

            /* Check if we need to confirm Sleep Request received previously */
            if (adapter->psstate == PS_STATE_PRE_SLEEP) {
                  if (!priv->dnld_sent && !adapter->cur_cmd) {
                        if (adapter->connect_status ==
                            LIBERTAS_CONNECTED) {
                              lbs_deb_thread(
                                     "main_thread: PRE_SLEEP--intcounter=%d currenttxskb=%p "
                                     "dnld_sent=%d cur_cmd=%p, confirm now\n",
                                     adapter->intcounter,
                                     adapter->currenttxskb,
                                     priv->dnld_sent,
                                     adapter->cur_cmd);

                              libertas_ps_confirm_sleep(priv,
                                           (u16) adapter->psmode);
                        } else {
                              /* workaround for firmware sending
                               * deauth/linkloss event immediately
                               * after sleep request, remove this
                               * after firmware fixes it
                               */
                              adapter->psstate = PS_STATE_AWAKE;
                              lbs_pr_alert(
                                     "main-thread: ignore PS_SleepConfirm in non-connected state\n");
                        }
                  }
            }

            /* The PS state is changed during processing of Sleep Request
             * event above
             */
            if ((priv->adapter->psstate == PS_STATE_SLEEP) ||
                (priv->adapter->psstate == PS_STATE_PRE_SLEEP))
                  continue;

            /* Execute the next command */
            if (!priv->dnld_sent && !priv->adapter->cur_cmd)
                  libertas_execute_next_command(priv);

            /* Wake-up command waiters which can't sleep in
             * libertas_prepare_and_send_command
             */
            if (!adapter->nr_cmd_pending)
                  wake_up_all(&adapter->cmd_pending);

            libertas_tx_runqueue(priv);
      }

      del_timer(&adapter->command_timer);
      adapter->nr_cmd_pending = 0;
      wake_up_all(&adapter->cmd_pending);

      lbs_deb_leave(LBS_DEB_THREAD);
      return 0;
}

/**
 *  @brief This function downloads firmware image, gets
 *  HW spec from firmware and set basic parameters to
 *  firmware.
 *
 *  @param priv    A pointer to wlan_private structure
 *  @return          0 or -1
 */
static int wlan_setup_firmware(wlan_private * priv)
{
      int ret = -1;
      wlan_adapter *adapter = priv->adapter;
      struct cmd_ds_mesh_access mesh_access;

      lbs_deb_enter(LBS_DEB_FW);

      /*
       * Read MAC address from HW
       */
      memset(adapter->current_addr, 0xff, ETH_ALEN);

      ret = libertas_prepare_and_send_command(priv, CMD_GET_HW_SPEC,
                            0, CMD_OPTION_WAITFORRSP, 0, NULL);

      if (ret) {
            ret = -1;
            goto done;
      }

      libertas_set_mac_packet_filter(priv);

      /* Get the supported Data rates */
      ret = libertas_prepare_and_send_command(priv, CMD_802_11_DATA_RATE,
                            CMD_ACT_GET_TX_RATE,
                            CMD_OPTION_WAITFORRSP, 0, NULL);

      if (ret) {
            ret = -1;
            goto done;
      }

      /* Disable mesh autostart */
      if (priv->mesh_dev) {
            memset(&mesh_access, 0, sizeof(mesh_access));
            mesh_access.data[0] = cpu_to_le32(0);
            ret = libertas_prepare_and_send_command(priv,
                        CMD_MESH_ACCESS,
                        CMD_ACT_MESH_SET_AUTOSTART_ENABLED,
                        CMD_OPTION_WAITFORRSP, 0, (void *)&mesh_access);
            if (ret) {
                  ret = -1;
                  goto done;
            }
            priv->mesh_autostart_enabled = 0;
      }

       /* Set the boot2 version in firmware */
       ret = libertas_prepare_and_send_command(priv, CMD_SET_BOOT2_VER,
                                   0, CMD_OPTION_WAITFORRSP, 0, NULL);

      ret = 0;
done:
      lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
      return ret;
}

/**
 *  This function handles the timeout of command sending.
 *  It will re-send the same command again.
 */
static void command_timer_fn(unsigned long data)
{
      wlan_private *priv = (wlan_private *)data;
      wlan_adapter *adapter = priv->adapter;
      struct cmd_ctrl_node *ptempnode;
      struct cmd_ds_command *cmd;
      unsigned long flags;

      ptempnode = adapter->cur_cmd;
      if (ptempnode == NULL) {
            lbs_deb_fw("ptempnode empty\n");
            return;
      }

      cmd = (struct cmd_ds_command *)ptempnode->bufvirtualaddr;
      if (!cmd) {
            lbs_deb_fw("cmd is NULL\n");
            return;
      }

      lbs_deb_fw("command_timer_fn fired, cmd %x\n", cmd->command);

      if (!adapter->fw_ready)
            return;

      spin_lock_irqsave(&adapter->driver_lock, flags);
      adapter->cur_cmd = NULL;
      spin_unlock_irqrestore(&adapter->driver_lock, flags);

      lbs_deb_fw("re-sending same command because of timeout\n");
      libertas_queue_cmd(adapter, ptempnode, 0);

      wake_up_interruptible(&priv->waitq);

      return;
}

static int libertas_init_adapter(wlan_private * priv)
{
      wlan_adapter *adapter = priv->adapter;
      size_t bufsize;
      int i, ret = 0;

      /* Allocate buffer to store the BSSID list */
      bufsize = MAX_NETWORK_COUNT * sizeof(struct bss_descriptor);
      adapter->networks = kzalloc(bufsize, GFP_KERNEL);
      if (!adapter->networks) {
            lbs_pr_err("Out of memory allocating beacons\n");
            ret = -1;
            goto out;
      }

      /* Initialize scan result lists */
      INIT_LIST_HEAD(&adapter->network_free_list);
      INIT_LIST_HEAD(&adapter->network_list);
      for (i = 0; i < MAX_NETWORK_COUNT; i++) {
            list_add_tail(&adapter->networks[i].list,
                        &adapter->network_free_list);
      }

      adapter->libertas_ps_confirm_sleep.seqnum = cpu_to_le16(++adapter->seqnum);
      adapter->libertas_ps_confirm_sleep.command =
          cpu_to_le16(CMD_802_11_PS_MODE);
      adapter->libertas_ps_confirm_sleep.size =
          cpu_to_le16(sizeof(struct PS_CMD_ConfirmSleep));
      adapter->libertas_ps_confirm_sleep.action =
          cpu_to_le16(CMD_SUBCMD_SLEEP_CONFIRMED);

      memset(adapter->current_addr, 0xff, ETH_ALEN);

      adapter->connect_status = LIBERTAS_DISCONNECTED;
      adapter->secinfo.auth_mode = IW_AUTH_ALG_OPEN_SYSTEM;
      adapter->mode = IW_MODE_INFRA;
      adapter->curbssparams.channel = DEFAULT_AD_HOC_CHANNEL;
      adapter->currentpacketfilter = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON;
      adapter->radioon = RADIO_ON;
      adapter->auto_rate = 1;
      adapter->capability = WLAN_CAPABILITY_SHORT_PREAMBLE;
      adapter->psmode = WLAN802_11POWERMODECAM;
      adapter->psstate = PS_STATE_FULL_POWER;

      mutex_init(&adapter->lock);

      memset(&adapter->tx_queue_ps, 0, NR_TX_QUEUE*sizeof(struct sk_buff*));
      adapter->tx_queue_idx = 0;
      spin_lock_init(&adapter->txqueue_lock);

      setup_timer(&adapter->command_timer, command_timer_fn,
                  (unsigned long)priv);

      INIT_LIST_HEAD(&adapter->cmdfreeq);
      INIT_LIST_HEAD(&adapter->cmdpendingq);

      spin_lock_init(&adapter->driver_lock);
      init_waitqueue_head(&adapter->cmd_pending);
      adapter->nr_cmd_pending = 0;

      /* Allocate the command buffers */
      if (libertas_allocate_cmd_buffer(priv)) {
            lbs_pr_err("Out of memory allocating command buffers\n");
            ret = -1;
      }

out:
      return ret;
}

static void libertas_free_adapter(wlan_private * priv)
{
      wlan_adapter *adapter = priv->adapter;

      if (!adapter) {
            lbs_deb_fw("why double free adapter?\n");
            return;
      }

      lbs_deb_fw("free command buffer\n");
      libertas_free_cmd_buffer(priv);

      lbs_deb_fw("free command_timer\n");
      del_timer(&adapter->command_timer);

      lbs_deb_fw("free scan results table\n");
      kfree(adapter->networks);
      adapter->networks = NULL;

      /* Free the adapter object itself */
      lbs_deb_fw("free adapter\n");
      kfree(adapter);
      priv->adapter = NULL;
}

/**
 * @brief This function adds the card. it will probe the
 * card, allocate the wlan_priv and initialize the device.
 *
 *  @param card    A pointer to card
 *  @return          A pointer to wlan_private structure
 */
wlan_private *libertas_add_card(void *card, struct device *dmdev)
{
      struct net_device *dev = NULL;
      wlan_private *priv = NULL;

      lbs_deb_enter(LBS_DEB_NET);

      /* Allocate an Ethernet device and register it */
      if (!(dev = alloc_etherdev(sizeof(wlan_private)))) {
            lbs_pr_err("init ethX device failed\n");
            goto done;
      }
      priv = dev->priv;

      /* allocate buffer for wlan_adapter */
      if (!(priv->adapter = kzalloc(sizeof(wlan_adapter), GFP_KERNEL))) {
            lbs_pr_err("allocate buffer for wlan_adapter failed\n");
            goto err_kzalloc;
      }

      if (libertas_init_adapter(priv)) {
            lbs_pr_err("failed to initialize adapter structure.\n");
            goto err_init_adapter;
      }

      priv->dev = dev;
      priv->card = card;
      priv->mesh_open = 0;
      priv->infra_open = 0;
      priv->hotplug_device = dmdev;

      /* Setup the OS Interface to our functions */
      dev->open = libertas_open;
      dev->hard_start_xmit = libertas_pre_start_xmit;
      dev->stop = libertas_close;
      dev->set_mac_address = libertas_set_mac_address;
      dev->tx_timeout = libertas_tx_timeout;
      dev->get_stats = libertas_get_stats;
      dev->watchdog_timeo = 5 * HZ;
      dev->ethtool_ops = &libertas_ethtool_ops;
#ifdef      WIRELESS_EXT
      dev->wireless_handlers = (struct iw_handler_def *)&libertas_handler_def;
#endif
      dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
      dev->set_multicast_list = libertas_set_multicast_list;

      SET_NETDEV_DEV(dev, dmdev);

      priv->rtap_net_dev = NULL;
      if (device_create_file(dmdev, &dev_attr_libertas_rtap))
            goto err_init_adapter;

      lbs_deb_thread("Starting main thread...\n");
      init_waitqueue_head(&priv->waitq);
      priv->main_thread = kthread_run(libertas_thread, dev, "libertas_main");
      if (IS_ERR(priv->main_thread)) {
            lbs_deb_thread("Error creating main thread.\n");
            goto err_kthread_run;
      }

      priv->work_thread = create_singlethread_workqueue("libertas_worker");
      INIT_DELAYED_WORK(&priv->assoc_work, libertas_association_worker);
      INIT_DELAYED_WORK(&priv->scan_work, libertas_scan_worker);
      INIT_WORK(&priv->sync_channel, libertas_sync_channel);

      goto done;

err_kthread_run:
      device_remove_file(dmdev, &dev_attr_libertas_rtap);

err_init_adapter:
      libertas_free_adapter(priv);

err_kzalloc:
      free_netdev(dev);
      priv = NULL;

done:
      lbs_deb_leave_args(LBS_DEB_NET, "priv %p", priv);
      return priv;
}
EXPORT_SYMBOL_GPL(libertas_add_card);


int libertas_remove_card(wlan_private *priv)
{
      wlan_adapter *adapter = priv->adapter;
      struct net_device *dev = priv->dev;
      union iwreq_data wrqu;

      lbs_deb_enter(LBS_DEB_MAIN);

      libertas_remove_rtap(priv);

      dev = priv->dev;
      device_remove_file(priv->hotplug_device, &dev_attr_libertas_rtap);

      cancel_delayed_work(&priv->scan_work);
      cancel_delayed_work(&priv->assoc_work);
      destroy_workqueue(priv->work_thread);

      if (adapter->psmode == WLAN802_11POWERMODEMAX_PSP) {
            adapter->psmode = WLAN802_11POWERMODECAM;
            libertas_ps_wakeup(priv, CMD_OPTION_WAITFORRSP);
      }

      memset(wrqu.ap_addr.sa_data, 0xaa, ETH_ALEN);
      wrqu.ap_addr.sa_family = ARPHRD_ETHER;
      wireless_send_event(priv->dev, SIOCGIWAP, &wrqu, NULL);

      /* Stop the thread servicing the interrupts */
      adapter->surpriseremoved = 1;
      kthread_stop(priv->main_thread);

      libertas_free_adapter(priv);

      priv->dev = NULL;
      free_netdev(dev);

      lbs_deb_leave(LBS_DEB_MAIN);
      return 0;
}
EXPORT_SYMBOL_GPL(libertas_remove_card);


int libertas_start_card(wlan_private *priv)
{
      struct net_device *dev = priv->dev;
      int ret = -1;

      lbs_deb_enter(LBS_DEB_MAIN);

      /* poke the firmware */
      ret = wlan_setup_firmware(priv);
      if (ret)
            goto done;

      /* init 802.11d */
      libertas_init_11d(priv);

      if (register_netdev(dev)) {
            lbs_pr_err("cannot register ethX device\n");
            goto done;
      }

      libertas_debugfs_init_one(priv, dev);

      lbs_pr_info("%s: Marvell WLAN 802.11 adapter\n", dev->name);

      ret = 0;

done:
      lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
      return ret;
}
EXPORT_SYMBOL_GPL(libertas_start_card);


int libertas_stop_card(wlan_private *priv)
{
      struct net_device *dev = priv->dev;
      int ret = -1;
      struct cmd_ctrl_node *cmdnode;
      unsigned long flags;

      lbs_deb_enter(LBS_DEB_MAIN);

      netif_stop_queue(priv->dev);
      netif_carrier_off(priv->dev);

      libertas_debugfs_remove_one(priv);

      /* Flush pending command nodes */
      spin_lock_irqsave(&priv->adapter->driver_lock, flags);
      list_for_each_entry(cmdnode, &priv->adapter->cmdpendingq, list) {
            cmdnode->cmdwaitqwoken = 1;
            wake_up_interruptible(&cmdnode->cmdwait_q);
      }
      spin_unlock_irqrestore(&priv->adapter->driver_lock, flags);

      unregister_netdev(dev);

      lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
      return ret;
}
EXPORT_SYMBOL_GPL(libertas_stop_card);


/**
 * @brief This function adds mshX interface
 *
 *  @param priv    A pointer to the wlan_private structure
 *  @return          0 if successful, -X otherwise
 */
int libertas_add_mesh(wlan_private *priv, struct device *dev)
{
      struct net_device *mesh_dev = NULL;
      int ret = 0;

      lbs_deb_enter(LBS_DEB_MESH);

      /* Allocate a virtual mesh device */
      if (!(mesh_dev = alloc_netdev(0, "msh%d", ether_setup))) {
            lbs_deb_mesh("init mshX device failed\n");
            ret = -ENOMEM;
            goto done;
      }
      mesh_dev->priv = priv;
      priv->mesh_dev = mesh_dev;

      mesh_dev->open = libertas_mesh_open;
      mesh_dev->hard_start_xmit = libertas_mesh_pre_start_xmit;
      mesh_dev->stop = libertas_mesh_close;
      mesh_dev->get_stats = libertas_get_stats;
      mesh_dev->set_mac_address = libertas_set_mac_address;
      mesh_dev->ethtool_ops = &libertas_ethtool_ops;
      memcpy(mesh_dev->dev_addr, priv->dev->dev_addr,
                  sizeof(priv->dev->dev_addr));

      SET_NETDEV_DEV(priv->mesh_dev, dev);

#ifdef      WIRELESS_EXT
      mesh_dev->wireless_handlers = (struct iw_handler_def *)&mesh_handler_def;
#endif
      /* Register virtual mesh interface */
      ret = register_netdev(mesh_dev);
      if (ret) {
            lbs_pr_err("cannot register mshX virtual interface\n");
            goto err_free;
      }

      ret = sysfs_create_group(&(mesh_dev->dev.kobj), &libertas_mesh_attr_group);
      if (ret)
            goto err_unregister;

      /* Everything successful */
      ret = 0;
      goto done;

err_unregister:
      unregister_netdev(mesh_dev);

err_free:
      free_netdev(mesh_dev);

done:
      lbs_deb_leave_args(LBS_DEB_MESH, "ret %d", ret);
      return ret;
}
EXPORT_SYMBOL_GPL(libertas_add_mesh);


void libertas_remove_mesh(wlan_private *priv)
{
      struct net_device *mesh_dev;

      lbs_deb_enter(LBS_DEB_MAIN);

      if (!priv)
            goto out;

      mesh_dev = priv->mesh_dev;

      netif_stop_queue(mesh_dev);
      netif_carrier_off(priv->mesh_dev);

      sysfs_remove_group(&(mesh_dev->dev.kobj), &libertas_mesh_attr_group);
      unregister_netdev(mesh_dev);

      priv->mesh_dev = NULL ;
      free_netdev(mesh_dev);

out:
      lbs_deb_leave(LBS_DEB_MAIN);
}
EXPORT_SYMBOL_GPL(libertas_remove_mesh);

/**
 *  @brief This function finds the CFP in
 *  region_cfp_table based on region and band parameter.
 *
 *  @param region  The region code
 *  @param band      The band
 *  @param cfp_no  A pointer to CFP number
 *  @return          A pointer to CFP
 */
struct chan_freq_power *libertas_get_region_cfp_table(u8 region, u8 band, int *cfp_no)
{
      int i, end;

      lbs_deb_enter(LBS_DEB_MAIN);

      end = ARRAY_SIZE(region_cfp_table);

      for (i = 0; i < end ; i++) {
            lbs_deb_main("region_cfp_table[i].region=%d\n",
                  region_cfp_table[i].region);
            if (region_cfp_table[i].region == region) {
                  *cfp_no = region_cfp_table[i].cfp_no_BG;
                  lbs_deb_leave(LBS_DEB_MAIN);
                  return region_cfp_table[i].cfp_BG;
            }
      }

      lbs_deb_leave_args(LBS_DEB_MAIN, "ret NULL");
      return NULL;
}

int libertas_set_regiontable(wlan_private * priv, u8 region, u8 band)
{
      wlan_adapter *adapter = priv->adapter;
      int ret = 0;
      int i = 0;

      struct chan_freq_power *cfp;
      int cfp_no;

      lbs_deb_enter(LBS_DEB_MAIN);

      memset(adapter->region_channel, 0, sizeof(adapter->region_channel));

      {
            cfp = libertas_get_region_cfp_table(region, band, &cfp_no);
            if (cfp != NULL) {
                  adapter->region_channel[i].nrcfp = cfp_no;
                  adapter->region_channel[i].CFP = cfp;
            } else {
                  lbs_deb_main("wrong region code %#x in band B/G\n",
                         region);
                  ret = -1;
                  goto out;
            }
            adapter->region_channel[i].valid = 1;
            adapter->region_channel[i].region = region;
            adapter->region_channel[i].band = band;
            i++;
      }
out:
      lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
      return ret;
}

/**
 *  @brief This function handles the interrupt. it will change PS
 *  state if applicable. it will wake up main_thread to handle
 *  the interrupt event as well.
 *
 *  @param dev     A pointer to net_device structure
 *  @return          n/a
 */
void libertas_interrupt(struct net_device *dev)
{
      wlan_private *priv = dev->priv;

      lbs_deb_enter(LBS_DEB_THREAD);

      lbs_deb_thread("libertas_interrupt: intcounter=%d\n",
             priv->adapter->intcounter);

      priv->adapter->intcounter++;

      if (priv->adapter->psstate == PS_STATE_SLEEP) {
            priv->adapter->psstate = PS_STATE_AWAKE;
            netif_wake_queue(dev);
            if (priv->mesh_dev)
                  netif_wake_queue(priv->mesh_dev);
      }

      wake_up_interruptible(&priv->waitq);

      lbs_deb_leave(LBS_DEB_THREAD);
}
EXPORT_SYMBOL_GPL(libertas_interrupt);

int libertas_reset_device(wlan_private *priv)
{
      int ret;

      lbs_deb_enter(LBS_DEB_MAIN);
      ret = libertas_prepare_and_send_command(priv, CMD_802_11_RESET,
                            CMD_ACT_HALT, 0, 0, NULL);
      msleep_interruptible(10);

      lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
      return ret;
}
EXPORT_SYMBOL_GPL(libertas_reset_device);

static int libertas_init_module(void)
{
      lbs_deb_enter(LBS_DEB_MAIN);
      libertas_debugfs_init();
      lbs_deb_leave(LBS_DEB_MAIN);
      return 0;
}

static void libertas_exit_module(void)
{
      lbs_deb_enter(LBS_DEB_MAIN);

      libertas_debugfs_remove();

      lbs_deb_leave(LBS_DEB_MAIN);
}

/*
 * rtap interface support fuctions
 */

static int libertas_rtap_open(struct net_device *dev)
{
        netif_carrier_off(dev);
        netif_stop_queue(dev);
        return 0;
}

static int libertas_rtap_stop(struct net_device *dev)
{
        return 0;
}

static int libertas_rtap_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
        netif_stop_queue(dev);
        return -EOPNOTSUPP;
}

static struct net_device_stats *libertas_rtap_get_stats(struct net_device *dev)
{
      wlan_private *priv = dev->priv;
      return &priv->ieee->stats;
}


void libertas_remove_rtap(wlan_private *priv)
{
      if (priv->rtap_net_dev == NULL)
            return;
      unregister_netdev(priv->rtap_net_dev);
      free_ieee80211(priv->rtap_net_dev);
      priv->rtap_net_dev = NULL;
}

int libertas_add_rtap(wlan_private *priv)
{
      int rc = 0;

      if (priv->rtap_net_dev)
            return -EPERM;

      priv->rtap_net_dev = alloc_ieee80211(0);
      if (priv->rtap_net_dev == NULL)
            return -ENOMEM;


      priv->ieee = netdev_priv(priv->rtap_net_dev);

      strcpy(priv->rtap_net_dev->name, "rtap%d");

      priv->rtap_net_dev->type = ARPHRD_IEEE80211_RADIOTAP;
      priv->rtap_net_dev->open = libertas_rtap_open;
      priv->rtap_net_dev->stop = libertas_rtap_stop;
      priv->rtap_net_dev->get_stats = libertas_rtap_get_stats;
      priv->rtap_net_dev->hard_start_xmit = libertas_rtap_hard_start_xmit;
      priv->rtap_net_dev->set_multicast_list = libertas_set_multicast_list;
      priv->rtap_net_dev->priv = priv;

      priv->ieee->iw_mode = IW_MODE_MONITOR;

      rc = register_netdev(priv->rtap_net_dev);
      if (rc) {
            free_ieee80211(priv->rtap_net_dev);
            priv->rtap_net_dev = NULL;
            return rc;
      }

      return 0;
}


module_init(libertas_init_module);
module_exit(libertas_exit_module);

MODULE_DESCRIPTION("Libertas WLAN Driver Library");
MODULE_AUTHOR("Marvell International Ltd.");
MODULE_LICENSE("GPL");

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