[PATCH] Marvell Libertas 8388 802.11b/g USB driver

Add the Marvell Libertas 8388 802.11 USB driver.

Signed-off-by: Marcelo Tosatti <marcelo@kvack.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 1258 insertions, 0 deletions

diff --git a/drivers/net/wireless/libertas/main.c b/drivers/net/wireless/libertas/main.c
new file mode 100644
index 00000000000..49704653011
--- /dev/null
+++ b/drivers/net/wireless/libertas/main.c
@@ -0,0 +1,1258 @@
+/**
+  * This file contains the major functions in WLAN
+  * driver. It includes init, exit, open, close and main
+  * thread etc..
+  */
+
+#include <linux/delay.h>
+#include <linux/freezer.h>
+#include <linux/etherdevice.h>
+#include <linux/netdevice.h>
+#include <linux/if_arp.h>
+
+#include <net/iw_handler.h>
+
+#include "host.h"
+#include "sbi.h"
+#include "decl.h"
+#include "dev.h"
+#include "fw.h"
+#include "wext.h"
+#include "debugfs.h"
+#include "assoc.h"
+
+#ifdef ENABLE_PM
+static struct pm_dev *wlan_pm_dev = NULL;
+#endif
+
+#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
+ */
+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,
+	 sizeof(channel_freq_power_US_BG) / sizeof(struct chan_freq_power),
+	 }
+	,
+	{0x20,			/*CANADA IC */
+	 channel_freq_power_US_BG,
+	 sizeof(channel_freq_power_US_BG) / sizeof(struct chan_freq_power),
+	 }
+	,
+	{0x30, /*EU*/ channel_freq_power_EU_BG,
+	 sizeof(channel_freq_power_EU_BG) / sizeof(struct chan_freq_power),
+	 }
+	,
+	{0x31, /*SPAIN*/ channel_freq_power_SPN_BG,
+	 sizeof(channel_freq_power_SPN_BG) / sizeof(struct chan_freq_power),
+	 }
+	,
+	{0x32, /*FRANCE*/ channel_freq_power_FR_BG,
+	 sizeof(channel_freq_power_FR_BG) / sizeof(struct chan_freq_power),
+	 }
+	,
+	{0x40, /*JAPAN*/ channel_freq_power_JPN_BG,
+	 sizeof(channel_freq_power_JPN_BG) / sizeof(struct chan_freq_power),
+	 }
+	,
+/*Add new region here */
+};
+
+/**
+ * the rates supported by the card
+ */
+u8 libertas_wlan_data_rates[WLAN_SUPPORTED_RATES] =
+    { 0x02, 0x04, 0x0B, 0x16, 0x00, 0x0C, 0x12,
+	0x18, 0x24, 0x30, 0x48, 0x60, 0x6C, 0x00
+};
+
+/**
+ * the rates supported
+ */
+u8 libertas_supported_rates[G_SUPPORTED_RATES] =
+    { 0x82, 0x84, 0x8b, 0x96, 0x0c, 0x12, 0x18, 0x24, 0x30, 0x48, 0x60, 0x6c,
+0 };
+
+/**
+ * the rates supported for ad-hoc G mode
+ */
+u8 libertas_adhoc_rates_g[G_SUPPORTED_RATES] =
+    { 0x82, 0x84, 0x8b, 0x96, 0x0c, 0x12, 0x18, 0x24, 0x30, 0x48, 0x60, 0x6c,
+0 };
+
+/**
+ * the rates supported for ad-hoc B mode
+ */
+u8 libertas_adhoc_rates_b[4] = { 0x82, 0x84, 0x8b, 0x96 };
+
+/**
+ * the global variable of a pointer to wlan_private
+ * structure variable
+ */
+static wlan_private *wlanpriv = NULL;
+
+#define MAX_DEVS 5
+static struct net_device *libertas_devs[MAX_DEVS];
+static int libertas_found = 0;
+
+/**
+ * the table to keep region code
+ */
+u16 libertas_region_code_to_index[MRVDRV_MAX_REGION_CODE] =
+    { 0x10, 0x20, 0x30, 0x31, 0x32, 0x40 };
+
+static u8 *default_fw_name = "usb8388.bin";
+
+/**
+ * Attributes exported through sysfs
+ */
+#define to_net_dev(class) container_of(class, struct net_device, class_dev)
+
+/**
+ * @brief Get function for sysfs attribute libertas_mpp
+ */
+static ssize_t libertas_mpp_get(struct class_device * dev, 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_mpp,
+			cmd_option_waitforrsp, 0, (void *)&mesh_access);
+
+	return snprintf(buf, 3, "%d\n", mesh_access.data[0]);
+}
+
+/**
+ * @brief Set function for sysfs attribute libertas_mpp
+ */
+static ssize_t libertas_mpp_set(struct class_device * dev, const char * buf,
+		size_t count) {
+	struct cmd_ds_mesh_access mesh_access;
+
+
+	memset(&mesh_access, 0, sizeof(mesh_access));
+	sscanf(buf, "%d", &(mesh_access.data[0]));
+	libertas_prepare_and_send_command((to_net_dev(dev))->priv,
+			cmd_mesh_access,
+			cmd_act_mesh_set_mpp,
+			cmd_option_waitforrsp, 0, (void *)&mesh_access);
+	return strlen(buf);
+}
+
+/**
+ * libertas_mpp attribute to be exported per mshX interface
+ * through sysfs (/sys/class/net/mshX/libertas-mpp)
+ */
+static CLASS_DEVICE_ATTR(libertas_mpp, 0644, libertas_mpp_get,
+		libertas_mpp_set );
+
+/**
+ *  @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_info("FW not ready, pre_open_check() return failure\n");
+		LEAVE();
+		return -1;
+	}
+
+	return 0;
+}
+
+/**
+ *  @brief This function opens the device
+ *
+ *  @param dev     A pointer to net_device structure
+ *  @return 	   0
+ */
+static int wlan_dev_open(struct net_device *dev)
+{
+	wlan_private *priv = (wlan_private *) dev->priv;
+	wlan_adapter *adapter = priv->adapter;
+
+	ENTER();
+
+
+	priv->open = 1;
+
+	if (adapter->connect_status == libertas_connected) {
+		netif_carrier_on(priv->wlan_dev.netdev);
+	} else
+		netif_carrier_off(priv->wlan_dev.netdev);
+
+	LEAVE();
+	return 0;
+}
+/**
+ *  @brief This function opens the mshX interface
+ *
+ *  @param dev     A pointer to net_device structure
+ *  @return 	   0
+ */
+static int 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_start_queue(priv->mesh_dev);
+	if (priv->infra_open == 0)
+		return wlan_dev_open(priv->wlan_dev.netdev) ;
+	return 0;
+}
+
+/**
+ *  @brief This function opens the ethX interface
+ *
+ *  @param dev     A pointer to net_device structure
+ *  @return 	   0
+ */
+static int wlan_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->wlan_dev.netdev);
+	if (priv->open == 0)
+		return wlan_dev_open(priv->wlan_dev.netdev) ;
+	return 0;
+}
+
+static int wlan_dev_close(struct net_device *dev)
+{
+	wlan_private *priv = dev->priv;
+
+	ENTER();
+
+	netif_carrier_off(priv->wlan_dev.netdev);
+	priv->open = 0;
+
+	LEAVE();
+	return 0;
+}
+
+/**
+ *  @brief This function closes the mshX interface
+ *
+ *  @param dev     A pointer to net_device structure
+ *  @return 	   0
+ */
+static int 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 wlan_dev_close( ((wlan_private *) dev->priv)->wlan_dev.netdev) ;
+	else
+		return 0;
+}
+
+/**
+ *  @brief This function closes the ethX interface
+ *
+ *  @param dev     A pointer to net_device structure
+ *  @return 	   0
+ */
+static int wlan_close(struct net_device *dev) {
+	wlan_private *priv = (wlan_private *) dev->priv;
+
+	netif_stop_queue(priv->wlan_dev.netdev);
+	priv->infra_open = 0;
+	if (priv->mesh_open == 0)
+		return wlan_dev_close( ((wlan_private *) dev->priv)->wlan_dev.netdev) ;
+	else
+		return 0;
+}
+
+
+#ifdef ENABLE_PM
+
+/**
+ *  @brief This function is a callback function. it is called by
+ *  kernel to enter or exit power saving mode.
+ *
+ *  @param pmdev   A pointer to pm_dev
+ *  @param pmreq   pm_request_t
+ *  @param pmdata  A pointer to pmdata
+ *  @return 	   0 or -1
+ */
+static int wlan_pm_callback(struct pm_dev *pmdev, pm_request_t pmreq,
+			    void *pmdata)
+{
+	wlan_private *priv = wlanpriv;
+	wlan_adapter *adapter = priv->adapter;
+	struct net_device *dev = priv->wlan_dev.netdev;
+
+	lbs_pr_debug(1, "WPRM_PM_CALLBACK: pmreq = %d.\n", pmreq);
+
+	switch (pmreq) {
+	case PM_SUSPEND:
+		lbs_pr_debug(1, "WPRM_PM_CALLBACK: enter PM_SUSPEND.\n");
+
+		/* in associated mode */
+		if (adapter->connect_status == libertas_connected) {
+			if ((adapter->psstate != PS_STATE_SLEEP)
+			    ) {
+				lbs_pr_debug(1,
+				       "wlan_pm_callback: can't enter sleep mode\n");
+				return -1;
+			} else {
+
+				/*
+				 * Detach the network interface
+				 * if the network is running
+				 */
+				if (netif_running(dev)) {
+					netif_device_detach(dev);
+					lbs_pr_debug(1,
+					       "netif_device_detach().\n");
+				}
+				libertas_sbi_suspend(priv);
+			}
+			break;
+		}
+
+		/* in non associated mode */
+
+		/*
+		 * Detach the network interface
+		 * if the network is running
+		 */
+		if (netif_running(dev))
+			netif_device_detach(dev);
+
+		/*
+		 * Storing and restoring of the regs be taken care
+		 * at the driver rest will be done at wlan driver
+		 * this makes driver independent of the card
+		 */
+
+		libertas_sbi_suspend(priv);
+
+		break;
+
+	case PM_RESUME:
+		/* in associated mode */
+		if (adapter->connect_status == libertas_connected) {
+			{
+				/*
+				 * Bring the inteface up first
+				 * This case should not happen still ...
+				 */
+				libertas_sbi_resume(priv);
+
+				/*
+				 * Attach the network interface
+				 * if the network is running
+				 */
+				if (netif_running(dev)) {
+					netif_device_attach(dev);
+					lbs_pr_debug(1,
+					       "after netif_device_attach().\n");
+				}
+				lbs_pr_debug(1,
+				       "After netif attach, in associated mode.\n");
+			}
+			break;
+		}
+
+		/* in non associated mode */
+
+		/*
+		 * Bring the inteface up first
+		 * This case should not happen still ...
+		 */
+
+		libertas_sbi_resume(priv);
+
+		if (netif_running(dev))
+			netif_device_attach(dev);
+
+		lbs_pr_debug(1, "after netif attach, in NON associated mode.\n");
+		break;
+	}
+
+	return 0;
+}
+#endif				/* ENABLE_PM */
+
+static int wlan_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	int ret = 0;
+	wlan_private *priv = dev->priv;
+
+	ENTER();
+
+	if (priv->wlan_dev.dnld_sent || priv->adapter->TxLockFlag) {
+		priv->stats.tx_dropped++;
+		goto done;
+	}
+
+	netif_stop_queue(priv->wlan_dev.netdev);
+
+	if (libertas_process_tx(priv, skb) == 0)
+		dev->trans_start = jiffies;
+done:
+	LEAVE();
+	return ret;
+}
+
+/**
+ * @brief Mark mesh packets and handover them to wlan_hard_start_xmit
+ *
+ */
+static int mesh_pre_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	wlan_private *priv = dev->priv;
+	ENTER();
+	SET_MESH_FRAME(skb);
+	LEAVE();
+
+	return wlan_hard_start_xmit(skb, priv->wlan_dev.netdev);
+}
+
+/**
+ * @brief Mark non-mesh packets and handover them to wlan_hard_start_xmit
+ *
+ */
+static int wlan_pre_start_xmit(struct sk_buff *skb, struct net_device *dev) {
+	ENTER();
+	UNSET_MESH_FRAME(skb);
+	LEAVE();
+	return wlan_hard_start_xmit(skb, dev);
+}
+
+static void wlan_tx_timeout(struct net_device *dev)
+{
+	wlan_private *priv = (wlan_private *) dev->priv;
+
+	ENTER();
+
+	lbs_pr_err("tx watch dog timeout!\n");
+
+	priv->wlan_dev.dnld_sent = DNLD_RES_RECEIVED;
+	dev->trans_start = jiffies;
+
+	if (priv->adapter->currenttxskb) {
+		if (priv->adapter->radiomode == WLAN_RADIOMODE_RADIOTAP) {
+			/* 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->mainthread.waitq);
+	} else if (priv->adapter->connect_status == libertas_connected)
+		netif_wake_queue(priv->wlan_dev.netdev);
+
+	LEAVE();
+}
+
+/**
+ *  @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 *wlan_get_stats(struct net_device *dev)
+{
+	wlan_private *priv = (wlan_private *) dev->priv;
+
+	return &priv->stats;
+}
+
+static int wlan_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;
+
+	ENTER();
+
+	memset(adapter->current_addr, 0, ETH_ALEN);
+
+	/* dev->dev_addr is 8 bytes */
+	lbs_dbg_hex("dev->dev_addr:", dev->dev_addr, ETH_ALEN);
+
+	lbs_dbg_hex("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_pr_debug(1, "set mac address failed.\n");
+		ret = -1;
+		goto done;
+	}
+
+	lbs_dbg_hex("adapter->macaddr:", adapter->current_addr, ETH_ALEN);
+	memcpy(dev->dev_addr, adapter->current_addr, ETH_ALEN);
+	memcpy(((wlan_private *) dev->priv)->mesh_dev->dev_addr, adapter->current_addr, ETH_ALEN);
+
+done:
+	LEAVE();
+	return ret;
+}
+
+static int wlan_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 wlan_set_multicast_list(struct net_device *dev)
+{
+	wlan_private *priv = dev->priv;
+	wlan_adapter *adapter = priv->adapter;
+	int oldpacketfilter;
+
+	ENTER();
+
+	oldpacketfilter = adapter->currentpacketfilter;
+
+	if (dev->flags & IFF_PROMISC) {
+		lbs_pr_debug(1, "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_pr_debug(1, "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_pr_debug(1, "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 =
+				    wlan_copy_multicast_address(adapter, dev);
+
+				lbs_pr_debug(1, "Multicast addresses: %d\n",
+				       dev->mc_count);
+
+				for (i = 0; i < dev->mc_count; i++) {
+					lbs_pr_debug(1, "Multicast address %d:"
+					       "%x %x %x %x %x %x\n", i,
+					       adapter->multicastlist[i][0],
+					       adapter->multicastlist[i][1],
+					       adapter->multicastlist[i][2],
+					       adapter->multicastlist[i][3],
+					       adapter->multicastlist[i][4],
+					       adapter->multicastlist[i][5]);
+				}
+				/* set 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);
+	}
+
+	LEAVE();
+}
+
+/**
+ *  @brief This function hanldes the major job in WLAN driver.
+ *  it handles the event 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 wlan_service_main_thread(void *data)
+{
+	struct wlan_thread *thread = data;
+	wlan_private *priv = thread->priv;
+	wlan_adapter *adapter = priv->adapter;
+	wait_queue_t wait;
+	u8 ireg = 0;
+
+	ENTER();
+
+	wlan_activate_thread(thread);
+
+	init_waitqueue_entry(&wait, current);
+
+	for (;;) {
+		lbs_pr_debug(1, "main-thread 111: intcounter=%d "
+		       "currenttxskb=%p dnld_sent=%d\n",
+		       adapter->intcounter,
+		       adapter->currenttxskb, priv->wlan_dev.dnld_sent);
+
+		add_wait_queue(&thread->waitq, &wait);
+		set_current_state(TASK_INTERRUPTIBLE);
+		spin_lock_irq(&adapter->driver_lock);
+		if ((adapter->psstate == PS_STATE_SLEEP) ||
+		    (!adapter->intcounter
+		     && (priv->wlan_dev.dnld_sent || adapter->cur_cmd ||
+			 list_empty(&adapter->cmdpendingq)))) {
+			lbs_pr_debug(1,
+			       "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_pr_debug(1,
+		       "main-thread 222 (waking up): intcounter=%d currenttxskb=%p "
+		       "dnld_sent=%d\n", adapter->intcounter,
+		       adapter->currenttxskb, priv->wlan_dev.dnld_sent);
+
+		set_current_state(TASK_RUNNING);
+		remove_wait_queue(&thread->waitq, &wait);
+		try_to_freeze();
+
+		lbs_pr_debug(1, "main-thread 333: intcounter=%d currenttxskb=%p "
+		       "dnld_sent=%d\n",
+		       adapter->intcounter,
+		       adapter->currenttxskb, priv->wlan_dev.dnld_sent);
+
+		if (kthread_should_stop()
+		    || adapter->surpriseremoved) {
+			lbs_pr_debug(1,
+			       "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 = libertas_sbi_get_int_status(priv, &ireg);
+
+			if (int_status) {
+				lbs_pr_debug(1,
+				       "main-thread: reading HOST_INT_STATUS_REG failed\n");
+				spin_unlock_irq(&adapter->driver_lock);
+				continue;
+			}
+			adapter->hisregcpy |= ireg;
+		}
+
+		lbs_pr_debug(1, "main-thread 444: intcounter=%d currenttxskb=%p "
+		       "dnld_sent=%d\n",
+		       adapter->intcounter,
+		       adapter->currenttxskb, priv->wlan_dev.dnld_sent);
+
+		/* command response? */
+		if (adapter->hisregcpy & his_cmdupldrdy) {
+			lbs_pr_debug(1, "main-thread: cmd response ready.\n");
+
+			adapter->hisregcpy &= ~his_cmdupldrdy;
+			spin_unlock_irq(&adapter->driver_lock);
+			libertas_process_rx_command(priv);
+			spin_lock_irq(&adapter->driver_lock);
+		}
+
+		/* Any Card Event */
+		if (adapter->hisregcpy & his_cardevent) {
+			lbs_pr_debug(1, "main-thread: Card Event Activity.\n");
+
+			adapter->hisregcpy &= ~his_cardevent;
+
+			if (libertas_sbi_read_event_cause(priv)) {
+				lbs_pr_alert(
+				       "main-thread: libertas_sbi_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->wlan_dev.dnld_sent && !adapter->cur_cmd) {
+				if (adapter->connect_status ==
+				    libertas_connected) {
+					lbs_pr_debug(1,
+					       "main_thread: PRE_SLEEP--intcounter=%d currenttxskb=%p "
+					       "dnld_sent=%d cur_cmd=%p, confirm now\n",
+					       adapter->intcounter,
+					       adapter->currenttxskb,
+					       priv->wlan_dev.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->wlan_dev.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);
+	wlan_deactivate_thread(thread);
+
+	LEAVE();
+	return 0;
+}
+
+/**
+ * @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 *wlan_add_card(void *card)
+{
+	struct net_device *dev = NULL;
+	struct net_device *mesh_dev = NULL;
+	wlan_private *priv = NULL;
+
+	ENTER();
+
+	/* Allocate an Ethernet device and register it */
+	if (!(dev = alloc_etherdev(sizeof(wlan_private)))) {
+		lbs_pr_alert( "Init ethernet device failed!\n");
+		return NULL;
+	}
+
+	priv = dev->priv;
+
+	/* allocate buffer for wlan_adapter */
+	if (!(priv->adapter = kmalloc(sizeof(wlan_adapter), GFP_KERNEL))) {
+		lbs_pr_alert( "Allocate buffer for wlan_adapter failed!\n");
+		goto err_kmalloc;
+	}
+
+	/* Allocate a virtual mesh device */
+	if (!(mesh_dev = alloc_netdev(0, "msh%d", ether_setup))) {
+		lbs_pr_debug(1, "Init ethernet device failed!\n");
+		return NULL;
+	}
+
+	/* Both intervaces share the priv structure */
+	mesh_dev->priv = priv;
+
+	/* init wlan_adapter */
+	memset(priv->adapter, 0, sizeof(wlan_adapter));
+
+	priv->wlan_dev.netdev = dev;
+	priv->wlan_dev.card = card;
+	priv->mesh_open = 0;
+	priv->infra_open = 0;
+	priv->mesh_dev = mesh_dev;
+	wlanpriv = priv;
+
+	SET_MODULE_OWNER(dev);
+	SET_MODULE_OWNER(mesh_dev);
+
+	/* Setup the OS Interface to our functions */
+	dev->open = wlan_open;
+	dev->hard_start_xmit = wlan_pre_start_xmit;
+	dev->stop = wlan_close;
+	dev->do_ioctl = libertas_do_ioctl;
+	dev->set_mac_address = wlan_set_mac_address;
+	mesh_dev->open = mesh_open;
+	mesh_dev->hard_start_xmit = mesh_pre_start_xmit;
+	mesh_dev->stop = mesh_close;
+	mesh_dev->do_ioctl = libertas_do_ioctl;
+	memcpy(mesh_dev->dev_addr, wlanpriv->wlan_dev.netdev->dev_addr,
+			sizeof(wlanpriv->wlan_dev.netdev->dev_addr));
+
+#define	WLAN_WATCHDOG_TIMEOUT	(5 * HZ)
+
+	dev->tx_timeout = wlan_tx_timeout;
+	dev->get_stats = wlan_get_stats;
+	dev->watchdog_timeo = WLAN_WATCHDOG_TIMEOUT;
+	dev->ethtool_ops = &libertas_ethtool_ops;
+	mesh_dev->get_stats = wlan_get_stats;
+	mesh_dev->ethtool_ops = &libertas_ethtool_ops;
+
+#ifdef	WIRELESS_EXT
+	dev->wireless_handlers = (struct iw_handler_def *)&libertas_handler_def;
+	mesh_dev->wireless_handlers = (struct iw_handler_def *)&libertas_handler_def;
+#endif
+#define NETIF_F_DYNALLOC 16
+	dev->features |= NETIF_F_DYNALLOC;
+	dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
+	dev->set_multicast_list = wlan_set_multicast_list;
+
+	INIT_LIST_HEAD(&priv->adapter->cmdfreeq);
+	INIT_LIST_HEAD(&priv->adapter->cmdpendingq);
+
+	spin_lock_init(&priv->adapter->driver_lock);
+	init_waitqueue_head(&priv->adapter->cmd_pending);
+	priv->adapter->nr_cmd_pending = 0;
+
+	lbs_pr_debug(1, "Starting kthread...\n");
+	priv->mainthread.priv = priv;
+	wlan_create_thread(wlan_service_main_thread,
+			   &priv->mainthread, "wlan_main_service");
+
+	priv->assoc_thread =
+		create_singlethread_workqueue("libertas_assoc");
+	INIT_DELAYED_WORK(&priv->assoc_work, wlan_association_worker);
+
+	/*
+	 * Register the device. Fillup the private data structure with
+	 * relevant information from the card and request for the required
+	 * IRQ.
+	 */
+	if (libertas_sbi_register_dev(priv) < 0) {
+		lbs_pr_info("failed to register wlan device!\n");
+		goto err_registerdev;
+	}
+
+	/* init FW and HW */
+	if (libertas_init_fw(priv)) {
+		lbs_pr_debug(1, "Firmware Init failed\n");
+		goto err_registerdev;
+	}
+
+	if (register_netdev(dev)) {
+		lbs_pr_err("Cannot register network device!\n");
+		goto err_init_fw;
+	}
+
+	/* Register virtual mesh interface */
+	if (register_netdev(mesh_dev)) {
+		lbs_pr_info("Cannot register mesh virtual interface!\n");
+		goto err_init_fw;
+	}
+
+	lbs_pr_info("%s: Marvell Wlan 802.11 adapter ", dev->name);
+
+	libertas_debugfs_init_one(priv, dev);
+
+	if (libertas_found == MAX_DEVS)
+		goto err_init_fw;
+	libertas_devs[libertas_found] = dev;
+	libertas_found++;
+#ifdef ENABLE_PM
+	if (!(wlan_pm_dev = pm_register(PM_UNKNOWN_DEV, 0, wlan_pm_callback)))
+		lbs_pr_alert( "failed to register PM callback\n");
+#endif
+	if (class_device_create_file(&(mesh_dev->class_dev), &class_device_attr_libertas_mpp))
+		goto err_create_file;
+
+	LEAVE();
+	return priv;
+
+err_create_file:
+	class_device_remove_file(&(mesh_dev->class_dev), &class_device_attr_libertas_mpp);
+err_init_fw:
+	libertas_sbi_unregister_dev(priv);
+err_registerdev:
+	destroy_workqueue(priv->assoc_thread);
+	/* Stop the thread servicing the interrupts */
+	wake_up_interruptible(&priv->mainthread.waitq);
+	wlan_terminate_thread(&priv->mainthread);
+	kfree(priv->adapter);
+err_kmalloc:
+	free_netdev(dev);
+	free_netdev(mesh_dev);
+	wlanpriv = NULL;
+
+	LEAVE();
+	return NULL;
+}
+
+static void wake_pending_cmdnodes(wlan_private *priv)
+{
+	struct cmd_ctrl_node *cmdnode;
+	unsigned long flags;
+
+	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);
+}
+
+
+int wlan_remove_card(void *card)
+{
+	wlan_private *priv = libertas_sbi_get_priv(card);
+	wlan_adapter *adapter;
+	struct net_device *dev;
+	struct net_device *mesh_dev;
+	union iwreq_data wrqu;
+	int i;
+
+	ENTER();
+
+	if (!priv) {
+		LEAVE();
+		return 0;
+	}
+
+	adapter = priv->adapter;
+
+	if (!adapter) {
+		LEAVE();
+		return 0;
+	}
+
+	dev = priv->wlan_dev.netdev;
+	mesh_dev = priv->mesh_dev;
+
+	netif_stop_queue(mesh_dev);
+	netif_stop_queue(priv->wlan_dev.netdev);
+	netif_carrier_off(priv->wlan_dev.netdev);
+
+	wake_pending_cmdnodes(priv);
+
+	class_device_remove_file(&(mesh_dev->class_dev), &class_device_attr_libertas_mpp);
+	unregister_netdev(mesh_dev);
+	unregister_netdev(dev);
+
+	cancel_delayed_work(&priv->assoc_work);
+	destroy_workqueue(priv->assoc_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->wlan_dev.netdev, SIOCGIWAP, &wrqu, NULL);
+
+#ifdef ENABLE_PM
+	pm_unregister(wlan_pm_dev);
+#endif
+
+	adapter->surpriseremoved = 1;
+
+	/* Stop the thread servicing the interrupts */
+	wlan_terminate_thread(&priv->mainthread);
+
+	libertas_debugfs_remove_one(priv);
+
+	lbs_pr_debug(1, "Free adapter\n");
+	libertas_free_adapter(priv);
+
+	for (i = 0; i<libertas_found; i++) {
+		if (libertas_devs[i]==priv->wlan_dev.netdev) {
+			libertas_devs[i] = libertas_devs[--libertas_found];
+			libertas_devs[libertas_found] = NULL ;
+			break ;
+		}
+	}
+
+	lbs_pr_debug(1, "Unregister finish\n");
+
+	priv->wlan_dev.netdev = NULL;
+	priv->mesh_dev = NULL ;
+	free_netdev(mesh_dev);
+	free_netdev(dev);
+	wlanpriv = NULL;
+
+	LEAVE();
+	return 0;
+}
+
+/**
+ *  @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;
+
+	ENTER();
+
+	end = sizeof(region_cfp_table)/sizeof(struct region_cfp_table);
+
+	for (i = 0; i < end ; i++) {
+		lbs_pr_debug(1, "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;
+			LEAVE();
+			return region_cfp_table[i].cfp_BG;
+		}
+	}
+
+	LEAVE();
+	return NULL;
+}
+
+int libertas_set_regiontable(wlan_private * priv, u8 region, u8 band)
+{
+	wlan_adapter *adapter = priv->adapter;
+	int i = 0;
+
+	struct chan_freq_power *cfp;
+	int cfp_no;
+
+	ENTER();
+
+	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_pr_debug(1, "wrong region code %#x in band B-G\n",
+			       region);
+			return -1;
+		}
+		adapter->region_channel[i].valid = 1;
+		adapter->region_channel[i].region = region;
+		adapter->region_channel[i].band = band;
+		i++;
+	}
+	LEAVE();
+	return 0;
+}
+
+/**
+ *  @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;
+
+	ENTER();
+
+	lbs_pr_debug(1, "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);
+	}
+
+	wake_up_interruptible(&priv->mainthread.waitq);
+
+	LEAVE();
+}
+
+static int wlan_init_module(void)
+{
+	int ret = 0;
+
+	ENTER();
+
+	if (libertas_fw_name == NULL) {
+		libertas_fw_name = default_fw_name;
+	}
+
+	libertas_debugfs_init();
+
+	if (libertas_sbi_register()) {
+		ret = -1;
+		libertas_debugfs_remove();
+		goto done;
+	}
+
+done:
+	LEAVE();
+	return ret;
+}
+
+static void wlan_cleanup_module(void)
+{
+	int i;
+
+	ENTER();
+
+	for (i = 0; i<libertas_found; i++) {
+		wlan_private *priv = libertas_devs[i]->priv;
+		reset_device(priv);
+	}
+
+	libertas_sbi_unregister();
+	libertas_debugfs_remove();
+
+	LEAVE();
+}
+
+module_init(wlan_init_module);
+module_exit(wlan_cleanup_module);
+
+MODULE_DESCRIPTION("M-WLAN Driver");
+MODULE_AUTHOR("Marvell International Ltd.");
+MODULE_LICENSE("GPL");